1 Changes in version 0.2.2.12-alpha - 2010-04-??
4 Changes in version 0.2.2.11-alpha - 2010-04-15
6 - Directory mirrors were fetching relay descriptors only from v2
7 directory authorities, rather than v3 authorities like they should.
8 Only 2 v2 authorities remain (compared to 7 v3 authorities), leading
9 to a serious bottleneck. Bugfix on 0.2.0.9-alpha. Fixes bug 1324.
10 - Fix a parsing error that made every possible value of
11 CircPriorityHalflifeMsec get treated as "1 msec". Bugfix
12 on 0.2.2.7-alpha. Rename CircPriorityHalflifeMsec to
13 CircuitPriorityHalflifeMsec, so authorities can tell newer relays
14 about the option without breaking older ones.
15 - Fix SSL renegotiation behavior on OpenSSL versions like on Centos
16 that claim to be earlier than 0.9.8m, but which have in reality
17 backported huge swaths of 0.9.8m or 0.9.8n renegotiation
18 behavior. Possible fix for some cases of bug 1346.
21 - Experiment with a more aggressive approach to preventing clients
22 from making one-hop exit streams. Exit relays who want to try it
23 out can set "RefuseUnknownExits 1" in their torrc, and then look
24 for "Attempt by %s to open a stream" log messages. Let us know
26 - Add support for statically linking zlib by specifying
27 --enable-static-zlib, to go with our support for statically linking
28 openssl and libevent. Resolves bug 1358.
31 - Fix a segfault that happens whenever a Tor client that is using
32 libevent2's bufferevents gets a hup signal. Bugfix on 0.2.2.5-alpha;
34 - When we cleaned up the contrib/tor-exit-notice.html file, we left
35 out the first line. Fixes bug 1295.
36 - When building the manpage from a tarball, we required asciidoc, but
37 the asciidoc -> roff/html conversion was already done for the
38 tarball. Make 'make' complain only when we need asciidoc (either
39 because we're compiling directly from git, or because we altered
40 the asciidoc manpage in the tarball). Bugfix on 0.2.2.9-alpha.
41 - When none of the directory authorities vote on any params, Tor
42 segfaulted when trying to make the consensus from the votes. We
43 didn't trigger the bug in practice, because authorities do include
44 params in their votes. Bugfix on 0.2.2.10-alpha; fixes bug 1322.
47 - In the util/threads test, no longer free the test_mutex before all
48 worker threads have finished. Bugfix on 0.2.1.6-alpha.
49 - The master thread could starve the worker threads quite badly on
50 certain systems, causing them to run only partially in the allowed
51 window. This resulted in test failures. Now the master thread sleeps
52 occasionally for a few microseconds while the two worker-threads
53 compete for the mutex. Bugfix on 0.2.0.1-alpha.
56 Changes in version 0.2.2.10-alpha - 2010-03-07
57 Tor 0.2.2.10-alpha fixes a regression introduced in 0.2.2.9-alpha that
58 could prevent relays from guessing their IP address correctly. It also
59 starts the groundwork for another client-side performance boost, since
60 currently we're not making efficient use of relays that have both the
61 Guard flag and the Exit flag.
64 - Fix a regression from our patch for bug 1244 that caused relays
65 to guess their IP address incorrectly if they didn't set Address
66 in their torrc and/or their address fails to resolve. Bugfix on
67 0.2.2.9-alpha; fixes bug 1269.
69 o Major features (performance):
70 - Directory authorities now compute consensus weightings that instruct
71 clients how to weight relays flagged as Guard, Exit, Guard+Exit,
72 and no flag. Clients that use these weightings will distribute
73 network load more evenly across these different relay types. The
74 weightings are in the consensus so we can change them globally in
75 the future. Extra thanks to "outofwords" for finding some nasty
76 security bugs in the first implementation of this feature.
78 o Minor features (performance):
79 - Always perform router selections using weighted relay bandwidth,
80 even if we don't need a high capacity circuit at the time. Non-fast
81 circuits now only differ from fast ones in that they can use relays
82 not marked with the Fast flag. This "feature" could turn out to
83 be a horrible bug; we should investigate more before it goes into
87 - Allow disabling building of the manpages. Skipping the manpage
88 speeds up the build considerably.
90 o Minor bugfixes (on 0.2.2.x):
91 - Fix a memleak in the EXTENDCIRCUIT logic. Spotted by coverity.
92 Bugfix on 0.2.2.9-alpha.
93 - Disallow values larger than INT32_MAX for PerConnBWRate|Burst
94 config option. Bugfix on 0.2.2.7-alpha.
95 - Ship the asciidoc-helper file in the tarball, so that people can
96 build from source if they want to, and touching the .1.txt files
97 doesn't break the build. Bugfix on 0.2.2.9-alpha.
99 o Minor bugfixes (on 0.2.1.x or earlier):
100 - Fix a dereference-then-NULL-check sequence when publishing
101 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
103 - Fix another dereference-then-NULL-check sequence. Bugfix on
104 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
105 - Make sure we treat potentially not NUL-terminated strings correctly.
106 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
108 o Code simplifications and refactoring:
109 - Fix some urls in the exit notice file and make it XHTML1.1 strict
110 compliant. Based on a patch from Christian Kujau.
111 - Don't use sed in asciidoc-helper anymore.
112 - Make the build process fail if asciidoc cannot be found and
113 building with asciidoc isn't disabled.
116 Changes in version 0.2.2.9-alpha - 2010-02-22
117 Tor 0.2.2.9-alpha makes Tor work again on the latest OS X, updates the
118 location of a directory authority, and cleans up a bunch of small bugs.
120 o Directory authority changes:
121 - Change IP address for dannenberg (v3 directory authority), and
122 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
123 service directory authority) from the list.
126 - Make Tor work again on the latest OS X: when deciding whether to
127 use strange flags to turn TLS renegotiation on, detect the OpenSSL
128 version at run-time, not compile time. We need to do this because
129 Apple doesn't update its dev-tools headers when it updates its
130 libraries in a security patch.
131 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
132 that could happen on 32-bit platforms with 64-bit time_t. Also fix
133 a memory leak when requesting a hidden service descriptor we've
134 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
136 - Authorities could be tricked into giving out the Exit flag to relays
137 that didn't allow exiting to any ports. This bug could screw
138 with load balancing and stats. Bugfix on 0.1.1.6-alpha; fixes bug
139 1238. Bug discovered by Martin Kowalczyk.
140 - When freeing a session key, zero it out completely. We only zeroed
141 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
142 patched by ekir. Fixes bug 1254.
145 - Fix static compilation by listing the openssl libraries in the right
146 order. Bugfix on Tor 0.2.2.8-alpha; fixes bug 1237.
147 - Resume handling .exit hostnames in a special way: originally we
148 stripped the .exit part and used the requested exit relay. In
149 0.2.2.1-alpha we stopped treating them in any special way, meaning
150 if you use a .exit address then Tor will pass it on to the exit
151 relay. Now we reject the .exit stream outright, since that behavior
152 might be more expected by the user. Found and diagnosed by Scott
153 Bennett and Downie on or-talk.
154 - Don't spam the controller with events when we have no file
155 descriptors available. Bugfix on 0.2.1.5-alpha. (Rate-limiting
156 for log messages was already solved from bug 748.)
157 - Avoid a bogus overlapped memcpy in tor_addr_copy(). Reported by
159 - Make the DNSPort option work with libevent 2.x. Don't alter the
160 behaviour for libevent 1.x. Fixes bug 1143. Found by SwissTorExit.
161 - Emit a GUARD DROPPED controller event for a case we missed.
162 - Make more fields in the controller protocol case-insensitive, since
163 control-spec.txt said they were.
164 - Refactor resolve_my_address() to not use gethostbyname() anymore.
165 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
166 - Fix a spec conformance issue: the network-status-version token
167 must be the first token in a v3 consensus or vote. Discovered by
168 parakeep. Bugfix on 0.2.0.3-alpha.
170 o Code simplifications and refactoring:
171 - Generate our manpage and HTML documentation using Asciidoc. This
172 change should make it easier to maintain the documentation, and
174 - Remove the --enable-iphone option. According to reports from Marco
175 Bonetti, Tor builds fine without any special tweaking on recent
177 - Removed some unnecessary files from the source distribution. The
178 AUTHORS file has now been merged into the people page on the
179 website. The roadmaps and design doc can now be found in the
180 projects directory in svn.
181 - Enabled various circuit build timeout constants to be controlled
182 by consensus parameters. Also set better defaults for these
183 parameters based on experimentation on broadband and simulated
187 - The 'EXTENDCIRCUIT' control port command can now be used with
188 a circ id of 0 and no path. This feature will cause Tor to build
189 a new 'fast' general purpose circuit using its own path selection
191 - Added a BUILDTIMEOUT_SET controller event to describe changes
192 to the circuit build timeout.
193 - Future-proof the controller protocol a bit by ignoring keyword
194 arguments we do not recognize.
195 - Expand homedirs passed to tor-checkkey. This should silence a
196 coverity complaint about passing a user-supplied string into
197 open() without checking it.
200 Changes in version 0.2.1.25 - 2010-03-16
201 Tor 0.2.1.25 fixes a regression introduced in 0.2.1.23 that could
202 prevent relays from guessing their IP address correctly. It also fixes
203 several minor potential security bugs.
206 - Fix a regression from our patch for bug 1244 that caused relays
207 to guess their IP address incorrectly if they didn't set Address
208 in their torrc and/or their address fails to resolve. Bugfix on
209 0.2.1.23; fixes bug 1269.
210 - When freeing a session key, zero it out completely. We only zeroed
211 the first ptrsize bytes. Bugfix on 0.0.2pre8. Discovered and
212 patched by ekir. Fixes bug 1254.
215 - Fix a dereference-then-NULL-check sequence when publishing
216 descriptors. Bugfix on 0.2.1.5-alpha. Discovered by ekir; fixes
218 - Fix another dereference-then-NULL-check sequence. Bugfix on
219 0.2.1.14-rc. Discovered by ekir; fixes bug 1256.
220 - Make sure we treat potentially not NUL-terminated strings correctly.
221 Bugfix on 0.1.1.13-alpha. Discovered by rieo; fixes bug 1257.
225 Changes in version 0.2.1.24 - 2010-02-21
226 Tor 0.2.1.24 makes Tor work again on the latest OS X -- this time
230 - Work correctly out-of-the-box with even more vendor-patched versions
231 of OpenSSL. In particular, make it so Debian and OS X don't need
232 customized patches to run/build.
235 Changes in version 0.2.1.23 - 2010-02-13
236 Tor 0.2.1.23 fixes a huge client-side performance bug, makes Tor work
237 again on the latest OS X, and updates the location of a directory
240 o Major bugfixes (performance):
241 - We were selecting our guards uniformly at random, and then weighting
242 which of our guards we'd use uniformly at random. This imbalance
243 meant that Tor clients were severely limited on throughput (and
244 probably latency too) by the first hop in their circuit. Now we
245 select guards weighted by currently advertised bandwidth. We also
246 automatically discard guards picked using the old algorithm. Fixes
247 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
250 - Make Tor work again on the latest OS X: when deciding whether to
251 use strange flags to turn TLS renegotiation on, detect the OpenSSL
252 version at run-time, not compile time. We need to do this because
253 Apple doesn't update its dev-tools headers when it updates its
254 libraries in a security patch.
255 - Fix a potential buffer overflow in lookup_last_hid_serv_request()
256 that could happen on 32-bit platforms with 64-bit time_t. Also fix
257 a memory leak when requesting a hidden service descriptor we've
258 requested before. Fixes bug 1242, bugfix on 0.2.0.18-alpha. Found
261 o Directory authority changes:
262 - Change IP address for dannenberg (v3 directory authority), and
263 remove moria2 (obsolete v1, v2 directory authority and v0 hidden
264 service directory authority) from the list.
267 - Refactor resolve_my_address() to not use gethostbyname() anymore.
268 Fixes bug 1244; bugfix on 0.0.2pre25. Reported by Mike Mestnik.
271 - Avoid a mad rush at the beginning of each month when each client
272 rotates half of its guards. Instead we spread the rotation out
273 throughout the month, but we still avoid leaving a precise timestamp
274 in the state file about when we first picked the guard. Improves
275 over the behavior introduced in 0.1.2.17.
278 Changes in version 0.2.2.8-alpha - 2010-01-26
279 Tor 0.2.2.8-alpha fixes a crash bug in 0.2.2.7-alpha that has been
280 causing bridge relays to disappear. If you're running a bridge,
284 - Fix a memory corruption bug on bridges that occured during the
285 inclusion of stats data in extra-info descriptors. Also fix the
286 interface for geoip_get_bridge_stats* to prevent similar bugs in
287 the future. Diagnosis by Tas, patch by Karsten and Sebastian.
288 Fixes bug 1208; bugfix on 0.2.2.7-alpha.
291 - Ignore OutboundBindAddress when connecting to localhost.
292 Connections to localhost need to come _from_ localhost, or else
293 local servers (like DNS and outgoing HTTP/SOCKS proxies) will often
297 Changes in version 0.2.2.7-alpha - 2010-01-19
298 Tor 0.2.2.7-alpha fixes a huge client-side performance bug, as well
299 as laying the groundwork for further relay-side performance fixes. It
300 also starts cleaning up client behavior with respect to the EntryNodes,
301 ExitNodes, and StrictNodes config options.
303 This release also rotates two directory authority keys, due to a
304 security breach of some of the Torproject servers.
306 o Directory authority changes:
307 - Rotate keys (both v3 identity and relay identity) for moria1
310 o Major features (performance):
311 - We were selecting our guards uniformly at random, and then weighting
312 which of our guards we'd use uniformly at random. This imbalance
313 meant that Tor clients were severely limited on throughput (and
314 probably latency too) by the first hop in their circuit. Now we
315 select guards weighted by currently advertised bandwidth. We also
316 automatically discard guards picked using the old algorithm. Fixes
317 bug 1217; bugfix on 0.2.1.3-alpha. Found by Mike Perry.
318 - When choosing which cells to relay first, relays can now favor
319 circuits that have been quiet recently, to provide lower latency
320 for low-volume circuits. By default, relays enable or disable this
321 feature based on a setting in the consensus. You can override
322 this default by using the new "CircuitPriorityHalflife" config
323 option. Design and code by Ian Goldberg, Can Tang, and Chris
325 - Add separate per-conn write limiting to go with the per-conn read
326 limiting. We added a global write limit in Tor 0.1.2.5-alpha,
327 but never per-conn write limits.
328 - New consensus params "bwconnrate" and "bwconnburst" to let us
329 rate-limit client connections as they enter the network. It's
330 controlled in the consensus so we can turn it on and off for
331 experiments. It's starting out off. Based on proposal 163.
333 o Major features (relay selection options):
334 - Switch to a StrictNodes config option, rather than the previous
335 "StrictEntryNodes" / "StrictExitNodes" separation that was missing a
336 "StrictExcludeNodes" option.
337 - If EntryNodes, ExitNodes, ExcludeNodes, or ExcludeExitNodes
338 change during a config reload, mark and discard all our origin
339 circuits. This fix should address edge cases where we change the
340 config options and but then choose a circuit that we created before
342 - If EntryNodes or ExitNodes are set, be more willing to use an
343 unsuitable (e.g. slow or unstable) circuit. The user asked for it,
345 - Make EntryNodes config option much more aggressive even when
346 StrictNodes is not set. Before it would prepend your requested
347 entrynodes to your list of guard nodes, but feel free to use others
348 after that. Now it chooses only from your EntryNodes if any of
349 those are available, and only falls back to others if a) they're
350 all down and b) StrictNodes is not set.
351 - Now we refresh your entry guards from EntryNodes at each consensus
352 fetch -- rather than just at startup and then they slowly rot as
356 - Stop bridge directory authorities from answering dbg-stability.txt
357 directory queries, which would let people fetch a list of all
358 bridge identities they track. Bugfix on 0.2.1.6-alpha.
361 - Log a notice when we get a new control connection. Now it's easier
362 for security-conscious users to recognize when a local application
363 is knocking on their controller door. Suggested by bug 1196.
364 - New config option "CircuitStreamTimeout" to override our internal
365 timeout schedule for how many seconds until we detach a stream from
366 a circuit and try a new circuit. If your network is particularly
367 slow, you might want to set this to a number like 60.
368 - New controller command "getinfo config-text". It returns the
369 contents that Tor would write if you send it a SAVECONF command,
370 so the controller can write the file to disk itself.
371 - New options for SafeLogging to allow scrubbing only log messages
372 generated while acting as a relay.
373 - Ship the bridges spec file in the tarball too.
374 - Avoid a mad rush at the beginning of each month when each client
375 rotates half of its guards. Instead we spread the rotation out
376 throughout the month, but we still avoid leaving a precise timestamp
377 in the state file about when we first picked the guard. Improves
378 over the behavior introduced in 0.1.2.17.
380 o Minor bugfixes (compiling):
381 - Fix compilation on OS X 10.3, which has a stub mlockall() but
382 hides it. Bugfix on 0.2.2.6-alpha.
383 - Fix compilation on Solaris by removing support for the
384 DisableAllSwap config option. Solaris doesn't have an rlimit for
385 mlockall, so we cannot use it safely. Fixes bug 1198; bugfix on
388 o Minor bugfixes (crashes):
389 - Do not segfault when writing buffer stats when we haven't observed
390 a single circuit to report about. Found by Fabian Lanze. Bugfix on
392 - If we're in the pathological case where there's no exit bandwidth
393 but there is non-exit bandwidth, or no guard bandwidth but there
394 is non-guard bandwidth, don't crash during path selection. Bugfix
396 - Fix an impossible-to-actually-trigger buffer overflow in relay
397 descriptor generation. Bugfix on 0.1.0.15.
399 o Minor bugfixes (privacy):
400 - Fix an instance where a Tor directory mirror might accidentally
401 log the IP address of a misbehaving Tor client. Bugfix on
403 - Don't list Windows capabilities in relay descriptors. We never made
404 use of them, and maybe it's a bad idea to publish them. Bugfix
407 o Minor bugfixes (other):
408 - Resolve an edge case in path weighting that could make us misweight
409 our relay selection. Fixes bug 1203; bugfix on 0.0.8rc1.
410 - Fix statistics on client numbers by country as seen by bridges that
411 were broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour
412 intervals instead of variable 12-to-48-hour intervals.
413 - After we free an internal connection structure, overwrite it
414 with a different memory value than we use for overwriting a freed
415 internal circuit structure. Should help with debugging. Suggested
417 - Update our OpenSSL 0.9.8l fix so that it works with OpenSSL 0.9.8m
421 - Remove the HSAuthorityRecordStats option that version 0 hidden
422 service authorities could have used to track statistics of overall
423 hidden service usage.
426 Changes in version 0.2.1.22 - 2010-01-19
427 Tor 0.2.1.22 fixes a critical privacy problem in bridge directory
428 authorities -- it would tell you its whole history of bridge descriptors
429 if you make the right directory request. This stable update also
430 rotates two of the seven v3 directory authority keys and locations.
432 o Directory authority changes:
433 - Rotate keys (both v3 identity and relay identity) for moria1
437 - Stop bridge directory authorities from answering dbg-stability.txt
438 directory queries, which would let people fetch a list of all
439 bridge identities they track. Bugfix on 0.2.1.6-alpha.
442 Changes in version 0.2.1.21 - 2009-12-21
443 Tor 0.2.1.21 fixes an incompatibility with the most recent OpenSSL
444 library. If you use Tor on Linux / Unix and you're getting SSL
445 renegotiation errors, upgrading should help. We also recommend an
446 upgrade if you're an exit relay.
449 - Work around a security feature in OpenSSL 0.9.8l that prevents our
450 handshake from working unless we explicitly tell OpenSSL that we
451 are using SSL renegotiation safely. We are, of course, but OpenSSL
452 0.9.8l won't work unless we say we are.
453 - Avoid crashing if the client is trying to upload many bytes and the
454 circuit gets torn down at the same time, or if the flip side
455 happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
458 - Do not refuse to learn about authority certs and v2 networkstatus
459 documents that are older than the latest consensus. This bug might
460 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
461 Spotted and fixed by xmux.
462 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
463 trigger platform-specific option misparsing case found by Coverity
465 - Fix a compilation warning on Fedora 12 by removing an impossible-to-
466 trigger assert. Fixes bug 1173.
469 Changes in version 0.2.2.6-alpha - 2009-11-19
470 Tor 0.2.2.6-alpha lays the groundwork for many upcoming features:
471 support for the new lower-footprint "microdescriptor" directory design,
472 future-proofing our consensus format against new hash functions or
473 other changes, and an Android port. It also makes Tor compatible with
474 the upcoming OpenSSL 0.9.8l release, and fixes a variety of bugs.
477 - Directory authorities can now create, vote on, and serve multiple
478 parallel formats of directory data as part of their voting process.
479 Partially implements Proposal 162: "Publish the consensus in
481 - Directory authorities can now agree on and publish small summaries
482 of router information that clients can use in place of regular
483 server descriptors. This transition will eventually allow clients
484 to use far less bandwidth for downloading information about the
485 network. Begins the implementation of Proposal 158: "Clients
486 download consensus + microdescriptors".
487 - The directory voting system is now extensible to use multiple hash
488 algorithms for signatures and resource selection. Newer formats
489 are signed with SHA256, with a possibility for moving to a better
490 hash algorithm in the future.
491 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
492 current and future memory pages via mlockall(). On supported
493 platforms (modern Linux and probably BSD but not Windows or OS X),
494 this should effectively disable any and all attempts to page out
495 memory. This option requires that you start your Tor as root --
496 if you use DisableAllSwap, please consider using the User option
497 to properly reduce the privileges of your Tor.
498 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
499 to help Tor build correctly for Android phones.
502 - Work around a security feature in OpenSSL 0.9.8l that prevents our
503 handshake from working unless we explicitly tell OpenSSL that we
504 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
505 won't work unless we say we are.
508 - Fix a crash bug when trying to initialize the evdns module in
509 Libevent 2. Bugfix on 0.2.1.16-rc.
510 - Stop logging at severity 'warn' when some other Tor client tries
511 to establish a circuit with us using weak DH keys. It's a protocol
512 violation, but that doesn't mean ordinary users need to hear about
513 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
514 - Do not refuse to learn about authority certs and v2 networkstatus
515 documents that are older than the latest consensus. This bug might
516 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
517 Spotted and fixed by xmux.
518 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
519 - If all authorities restart at once right before a consensus vote,
520 nobody will vote about "Running", and clients will get a consensus
521 with no usable relays. Instead, authorities refuse to build a
522 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
523 - If your relay can't keep up with the number of incoming create
524 cells, it would log one warning per failure into your logs. Limit
525 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
526 - Bridges now use "reject *:*" as their default exit policy. Bugfix
527 on 0.2.0.3-alpha; fixes bug 1113.
528 - Fix a memory leak on directory authorities during voting that was
529 introduced in 0.2.2.1-alpha. Found via valgrind.
532 Changes in version 0.2.1.20 - 2009-10-15
533 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
534 services at once, prepares for more performance improvements, and
535 fixes a bunch of smaller bugs.
537 The Windows and OS X bundles also include a more recent Vidalia,
538 and switch from Privoxy to Polipo.
540 The OS X installers are now drag and drop. It's best to un-install
541 Tor/Vidalia and then install this new bundle, rather than upgrade. If
542 you want to upgrade, you'll need to update the paths for Tor and Polipo
543 in the Vidalia Settings window.
546 - Send circuit or stream sendme cells when our window has decreased
547 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
548 by Karsten when testing the "reduce circuit window" performance
549 patch. Bugfix on the 54th commit on Tor -- from July 2002,
550 before the release of Tor 0.0.0. This is the new winner of the
552 - Fix a remotely triggerable memory leak when a consensus document
553 contains more than one signature from the same voter. Bugfix on
555 - Avoid segfault in rare cases when finishing an introduction circuit
556 as a client and finding out that we don't have an introduction key
557 for it. Fixes bug 1073. Reported by Aaron Swartz.
560 - Tor now reads the "circwindow" parameter out of the consensus,
561 and uses that value for its circuit package window rather than the
562 default of 1000 cells. Begins the implementation of proposal 168.
564 o New directory authorities:
565 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
567 - Move moria1 and tonga to alternate IP addresses.
570 - Fix a signed/unsigned compile warning in 0.2.1.19.
571 - Fix possible segmentation fault on directory authorities. Bugfix on
573 - Fix an extremely rare infinite recursion bug that could occur if
574 we tried to log a message after shutting down the log subsystem.
575 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
576 - Fix an obscure bug where hidden services on 64-bit big-endian
577 systems might mis-read the timestamp in v3 introduce cells, and
578 refuse to connect back to the client. Discovered by "rotor".
579 Bugfix on 0.2.1.6-alpha.
580 - We were triggering a CLOCK_SKEW controller status event whenever
581 we connect via the v2 connection protocol to any relay that has
582 a wrong clock. Instead, we should only inform the controller when
583 it's a trusted authority that claims our clock is wrong. Bugfix
584 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
585 - We were telling the controller about CHECKING_REACHABILITY and
586 REACHABILITY_FAILED status events whenever we launch a testing
587 circuit or notice that one has failed. Instead, only tell the
588 controller when we want to inform the user of overall success or
589 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
591 - Don't warn when we're using a circuit that ends with a node
592 excluded in ExcludeExitNodes, but the circuit is not used to access
593 the outside world. This should help fix bug 1090. Bugfix on
595 - Work around a small memory leak in some versions of OpenSSL that
596 stopped the memory used by the hostname TLS extension from being
600 - Add a "getinfo status/accepted-server-descriptor" controller
601 command, which is the recommended way for controllers to learn
602 whether our server descriptor has been successfully received by at
603 least on directory authority. Un-recommend good-server-descriptor
604 getinfo and status events until we have a better design for them.
607 Changes in version 0.2.2.5-alpha - 2009-10-11
608 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
611 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
613 o New directory authorities:
614 - Move dizum to an alternate IP address.
617 Changes in version 0.2.2.4-alpha - 2009-10-10
618 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
619 introduces a new unit test framework, shifts directry authority
620 addresses around to reduce the impact from recent blocking events,
621 and fixes a few smaller bugs.
624 - Fix several more asserts in the circuit_build_times code, for
625 example one that causes Tor to fail to start once we have
626 accumulated 5000 build times in the state file. Bugfixes on
627 0.2.2.2-alpha; fixes bug 1108.
629 o New directory authorities:
630 - Move moria1 and Tonga to alternate IP addresses.
633 - Log SSL state transitions at debug level during handshake, and
634 include SSL states in error messages. This may help debug future
635 SSL handshake issues.
636 - Add a new "Handshake" log domain for activities that happen
637 during the TLS handshake.
638 - Revert to the "June 3 2009" ip-to-country file. The September one
639 seems to have removed most US IP addresses.
640 - Directory authorities now reject Tor relays with versions less than
641 0.1.2.14. This step cuts out four relays from the current network,
642 none of which are very big.
645 - Fix a couple of smaller issues with gathering statistics. Bugfixes
647 - Fix two memory leaks in the error case of
648 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
649 - Don't count one-hop circuits when we're estimating how long it
650 takes circuits to build on average. Otherwise we'll set our circuit
651 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
652 - Directory authorities no longer change their opinion of, or vote on,
653 whether a router is Running, unless they have themselves been
654 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
657 o Code simplifications and refactoring:
658 - Revise our unit tests to use the "tinytest" framework, so we
659 can run tests in their own processes, have smarter setup/teardown
660 code, and so on. The unit test code has moved to its own
661 subdirectory, and has been split into multiple modules.
664 Changes in version 0.2.2.3-alpha - 2009-09-23
665 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
668 - Fix an overzealous assert in our new circuit build timeout code.
669 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
672 - If the networkstatus consensus tells us that we should use a
673 negative circuit package window, ignore it. Otherwise we'll
674 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
677 Changes in version 0.2.2.2-alpha - 2009-09-21
678 Tor 0.2.2.2-alpha introduces our latest performance improvement for
679 clients: Tor tracks the average time it takes to build a circuit, and
680 avoids using circuits that take too long to build. For fast connections,
681 this feature can cut your expected latency in half. For slow or flaky
682 connections, it could ruin your Tor experience. Let us know if it does!
685 - Tor now tracks how long it takes to build client-side circuits
686 over time, and adapts its timeout to local network performance.
687 Since a circuit that takes a long time to build will also provide
688 bad performance, we get significant latency improvements by
689 discarding the slowest 20% of circuits. Specifically, Tor creates
690 circuits more aggressively than usual until it has enough data
691 points for a good timeout estimate. Implements proposal 151.
692 We are especially looking for reports (good and bad) from users with
693 both EDGE and broadband connections that can move from broadband
694 to EDGE and find out if the build-time data in the .tor/state gets
695 reset without loss of Tor usability. You should also see a notice
696 log message telling you that Tor has reset its timeout.
697 - Directory authorities can now vote on arbitary integer values as
698 part of the consensus process. This is designed to help set
699 network-wide parameters. Implements proposal 167.
700 - Tor now reads the "circwindow" parameter out of the consensus,
701 and uses that value for its circuit package window rather than the
702 default of 1000 cells. Begins the implementation of proposal 168.
705 - Fix a remotely triggerable memory leak when a consensus document
706 contains more than one signature from the same voter. Bugfix on
710 - Fix an extremely rare infinite recursion bug that could occur if
711 we tried to log a message after shutting down the log subsystem.
712 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
713 - Fix parsing for memory or time units given without a space between
714 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
715 - A networkstatus vote must contain exactly one signature. Spec
716 conformance issue. Bugfix on 0.2.0.3-alpha.
717 - Fix an obscure bug where hidden services on 64-bit big-endian
718 systems might mis-read the timestamp in v3 introduce cells, and
719 refuse to connect back to the client. Discovered by "rotor".
720 Bugfix on 0.2.1.6-alpha.
721 - We were triggering a CLOCK_SKEW controller status event whenever
722 we connect via the v2 connection protocol to any relay that has
723 a wrong clock. Instead, we should only inform the controller when
724 it's a trusted authority that claims our clock is wrong. Bugfix
725 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
726 - We were telling the controller about CHECKING_REACHABILITY and
727 REACHABILITY_FAILED status events whenever we launch a testing
728 circuit or notice that one has failed. Instead, only tell the
729 controller when we want to inform the user of overall success or
730 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
732 - Don't warn when we're using a circuit that ends with a node
733 excluded in ExcludeExitNodes, but the circuit is not used to access
734 the outside world. This should help fix bug 1090, but more problems
735 remain. Bugfix on 0.2.1.6-alpha.
736 - Work around a small memory leak in some versions of OpenSSL that
737 stopped the memory used by the hostname TLS extension from being
739 - Make our 'torify' script more portable; if we have only one of
740 'torsocks' or 'tsocks' installed, don't complain to the user;
741 and explain our warning about tsocks better.
744 - Add a "getinfo status/accepted-server-descriptor" controller
745 command, which is the recommended way for controllers to learn
746 whether our server descriptor has been successfully received by at
747 least on directory authority. Un-recommend good-server-descriptor
748 getinfo and status events until we have a better design for them.
749 - Update to the "September 4 2009" ip-to-country file.
752 Changes in version 0.2.2.1-alpha - 2009-08-26
753 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
754 Tor clients to bootstrap on networks where only port 80 is reachable,
755 makes it more straightforward to support hardware crypto accelerators,
756 and starts the groundwork for gathering stats safely at relays.
759 - Start the process of disabling ".exit" address notation, since it
760 can be used for a variety of esoteric application-level attacks
761 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
764 o New directory authorities:
765 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
769 - New AccelName and AccelDir options add support for dynamic OpenSSL
770 hardware crypto acceleration engines.
771 - Tor now supports tunneling all of its outgoing connections over
772 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
773 configuration options. Code by Christopher Davis.
776 - Send circuit or stream sendme cells when our window has decreased
777 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
778 by Karsten when testing the "reduce circuit window" performance
779 patch. Bugfix on the 54th commit on Tor -- from July 2002,
780 before the release of Tor 0.0.0. This is the new winner of the
783 o New options for gathering stats safely:
784 - Directories that set "DirReqStatistics 1" write statistics on
785 directory request to disk every 24 hours. As compared to the
786 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
787 1) stats are written to disk exactly every 24 hours; 2) estimated
788 shares of v2 and v3 requests are determined as mean values, not at
789 the end of a measurement period; 3) unresolved requests are listed
790 with country code '??'; 4) directories also measure download times.
791 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
792 number of exit streams and transferred bytes per port to disk every
794 - Relays that set "CellStatistics 1" write statistics on how long
795 cells spend in their circuit queues to disk every 24 hours.
796 - Entry nodes that set "EntryStatistics 1" write statistics on the
797 rough number and origins of connecting clients to disk every 24
799 - Relays that write any of the above statistics to disk and set
800 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
801 their extra-info documents.
804 - New --digests command-line switch to output the digests of the
805 source files Tor was built with.
806 - The "torify" script now uses torsocks where available.
807 - The memarea code now uses a sentinel value at the end of each area
808 to make sure nothing writes beyond the end of an area. This might
809 help debug some conceivable causes of bug 930.
810 - Time and memory units in the configuration file can now be set to
811 fractional units. For example, "2.5 GB" is now a valid value for
813 - Certain Tor clients (such as those behind check.torproject.org) may
814 want to fetch the consensus in an extra early manner. To enable this
815 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
816 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
817 as only certain clients who must have this information sooner should
819 - Instead of adding the svn revision to the Tor version string, report
820 the git commit (when we're building from a git checkout).
823 - If any the v3 certs we download are unparseable, we should actually
824 notice the failure so we don't retry indefinitely. Bugfix on
825 0.2.0.x; reported by "rotator".
826 - If the cached cert file is unparseable, warn but don't exit.
827 - Fix possible segmentation fault on directory authorities. Bugfix on
829 - When Tor fails to parse a descriptor of any kind, dump it to disk.
830 Might help diagnosing bug 1051.
832 o Deprecated and removed features:
833 - The controller no longer accepts the old obsolete "addr-mappings/"
834 or "unregistered-servers-" GETINFO values.
835 - Hidden services no longer publish version 0 descriptors, and clients
836 do not request or use version 0 descriptors. However, the old hidden
837 service authorities still accept and serve version 0 descriptors
838 when contacted by older hidden services/clients.
839 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
840 always on; using them is necessary for correct forward-compatible
842 - Remove support for .noconnect style addresses. Nobody was using
843 them, and they provided another avenue for detecting Tor users
844 via application-level web tricks.
847 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
848 installer bundles. See
849 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
850 for details of what's new in Vidalia 0.2.3.
851 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
852 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
853 configuration file, rather than the old Privoxy.
854 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
855 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
856 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
857 better compatibility with OS X 10.6, aka Snow Leopard.
858 - OS X Vidalia Bundle: The multi-package installer is now replaced
859 by a simple drag and drop to the /Applications folder. This change
860 occurred with the upgrade to Vidalia 0.2.3.
863 Changes in version 0.2.1.19 - 2009-07-28
864 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
865 services on Tor 0.2.1.3-alpha through 0.2.1.18.
868 - Make accessing hidden services on 0.2.1.x work right again.
869 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
870 part of patch provided by "optimist".
873 - When a relay/bridge is writing out its identity key fingerprint to
874 the "fingerprint" file and to its logs, write it without spaces. Now
875 it will look like the fingerprints in our bridges documentation,
876 and confuse fewer users.
879 - Relays no longer publish a new server descriptor if they change
880 their MaxAdvertisedBandwidth config option but it doesn't end up
881 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
882 fixes bug 1026. Patch from Sebastian.
883 - Avoid leaking memory every time we get a create cell but we have
884 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
885 fixes bug 1034. Reported by BarkerJr.
888 Changes in version 0.2.1.18 - 2009-07-24
889 Tor 0.2.1.18 lays the foundations for performance improvements,
890 adds status events to help users diagnose bootstrap problems, adds
891 optional authentication/authorization for hidden services, fixes a
892 variety of potential anonymity problems, and includes a huge pile of
893 other features and bug fixes.
896 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
899 Changes in version 0.2.1.17-rc - 2009-07-07
900 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
901 candidate for the 0.2.1.x series. It lays the groundwork for further
902 client performance improvements, and also fixes a big bug with directory
903 authorities that were causing them to assign Guard and Stable flags
906 The Windows bundles also finally include the geoip database that we
907 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
908 should actually install Torbutton rather than giving you a cryptic
909 failure message (oops).
912 - Clients now use the bandwidth values in the consensus, rather than
913 the bandwidth values in each relay descriptor. This approach opens
914 the door to more accurate bandwidth estimates once the directory
915 authorities start doing active measurements. Implements more of
919 - When Tor clients restart after 1-5 days, they discard all their
920 cached descriptors as too old, but they still use the cached
921 consensus document. This approach is good for robustness, but
922 bad for performance: since they don't know any bandwidths, they
923 end up choosing at random rather than weighting their choice by
924 speed. Fixed by the above feature of putting bandwidths in the
925 consensus. Bugfix on 0.2.0.x.
926 - Directory authorities were neglecting to mark relays down in their
927 internal histories if the relays fall off the routerlist without
928 ever being found unreachable. So there were relays in the histories
929 that haven't been seen for eight months, and are listed as being
930 up for eight months. This wreaked havoc on the "median wfu"
931 and "median mtbf" calculations, in turn making Guard and Stable
932 flags very wrong, hurting network performance. Fixes bugs 696 and
933 969. Bugfix on 0.2.0.6-alpha.
936 - Serve the DirPortFrontPage page even when we have been approaching
937 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
938 - The control port would close the connection before flushing long
939 replies, such as the network consensus, if a QUIT command was issued
940 before the reply had completed. Now, the control port flushes all
941 pending replies before closing the connection. Also fixed a spurious
942 warning when a QUIT command is issued after a malformed or rejected
943 AUTHENTICATE command, but before the connection was closed. Patch
944 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
945 - When we can't find an intro key for a v2 hidden service descriptor,
946 fall back to the v0 hidden service descriptor and log a bug message.
947 Workaround for bug 1024.
948 - Fix a log message that did not respect the SafeLogging option.
952 - If we're a relay and we change our IP address, be more verbose
953 about the reason that made us change. Should help track down
954 further bugs for relays on dynamic IP addresses.
957 Changes in version 0.2.0.35 - 2009-06-24
959 - Avoid crashing in the presence of certain malformed descriptors.
960 Found by lark, and by automated fuzzing.
961 - Fix an edge case where a malicious exit relay could convince a
962 controller that the client's DNS question resolves to an internal IP
963 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
966 - Finally fix the bug where dynamic-IP relays disappear when their
967 IP address changes: directory mirrors were mistakenly telling
968 them their old address if they asked via begin_dir, so they
969 never got an accurate answer about their new address, so they
970 just vanished after a day. For belt-and-suspenders, relays that
971 don't set Address in their config now avoid using begin_dir for
972 all direct connections. Should fix bugs 827, 883, and 900.
973 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
974 that would occur on some exit nodes when DNS failures and timeouts
975 occurred in certain patterns. Fix for bug 957.
978 - When starting with a cache over a few days old, do not leak
979 memory for the obsolete router descriptors in it. Bugfix on
980 0.2.0.33; fixes bug 672.
981 - Hidden service clients didn't use a cached service descriptor that
982 was older than 15 minutes, but wouldn't fetch a new one either,
983 because there was already one in the cache. Now, fetch a v2
984 descriptor unless the same descriptor was added to the cache within
985 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
988 Changes in version 0.2.1.16-rc - 2009-06-20
989 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
990 a bunch of minor bugs.
993 - Fix an edge case where a malicious exit relay could convince a
994 controller that the client's DNS question resolves to an internal IP
995 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
997 o Major performance improvements (on 0.2.0.x):
998 - Disable and refactor some debugging checks that forced a linear scan
999 over the whole server-side DNS cache. These accounted for over 50%
1000 of CPU time on a relatively busy exit node's gprof profile. Found
1002 - Disable some debugging checks that appeared in exit node profile
1006 - Update to the "June 3 2009" ip-to-country file.
1007 - Do not have tor-resolve automatically refuse all .onion addresses;
1008 if AutomapHostsOnResolve is set in your torrc, this will work fine.
1010 o Minor bugfixes (on 0.2.0.x):
1011 - Log correct error messages for DNS-related network errors on
1013 - Fix a race condition that could cause crashes or memory corruption
1014 when running as a server with a controller listening for log
1016 - Avoid crashing when we have a policy specified in a DirPolicy or
1017 SocksPolicy or ReachableAddresses option with ports set on it,
1018 and we re-load the policy. May fix bug 996.
1019 - Hidden service clients didn't use a cached service descriptor that
1020 was older than 15 minutes, but wouldn't fetch a new one either,
1021 because there was already one in the cache. Now, fetch a v2
1022 descriptor unless the same descriptor was added to the cache within
1023 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
1025 o Minor bugfixes (on 0.2.1.x):
1026 - Don't warn users about low port and hibernation mix when they
1027 provide a *ListenAddress directive to fix that. Bugfix on
1029 - When switching back and forth between bridge mode, do not start
1030 gathering GeoIP data until two hours have passed.
1031 - Do not complain that the user has requested an excluded node as
1032 an exit when the node is not really an exit. This could happen
1033 because the circuit was for testing, or an introduction point.
1037 Changes in version 0.2.1.15-rc - 2009-05-25
1038 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
1039 series. It fixes a major bug on fast exit relays, as well as a variety
1042 o Major bugfixes (on 0.2.0.x):
1043 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
1044 that would occur on some exit nodes when DNS failures and timeouts
1045 occurred in certain patterns. Fix for bug 957.
1047 o Minor bugfixes (on 0.2.0.x):
1048 - Actually return -1 in the error case for read_bandwidth_usage().
1049 Harmless bug, since we currently don't care about the return value
1050 anywhere. Bugfix on 0.2.0.9-alpha.
1051 - Provide a more useful log message if bug 977 (related to buffer
1052 freelists) ever reappears, and do not crash right away.
1053 - Fix an assertion failure on 64-bit platforms when we allocated
1054 memory right up to the end of a memarea, then realigned the memory
1055 one step beyond the end. Fixes a possible cause of bug 930.
1056 - Protect the count of open sockets with a mutex, so we can't
1057 corrupt it when two threads are closing or opening sockets at once.
1058 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
1059 - Don't allow a bridge to publish its router descriptor to a
1060 non-bridge directory authority. Fixes part of bug 932.
1061 - When we change to or from being a bridge, reset our counts of
1062 client usage by country. Fixes bug 932.
1063 - Fix a bug that made stream bandwidth get misreported to the
1065 - Stop using malloc_usable_size() to use more area than we had
1066 actually allocated: it was safe, but made valgrind really unhappy.
1067 - Fix a memory leak when v3 directory authorities load their keys
1068 and cert from disk. Bugfix on 0.2.0.1-alpha.
1070 o Minor bugfixes (on 0.2.1.x):
1071 - Fix use of freed memory when deciding to mark a non-addable
1072 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
1075 Changes in version 0.2.1.14-rc - 2009-04-12
1076 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
1077 series. It begins fixing some major performance problems, and also
1078 finally addresses the bug that was causing relays on dynamic IP
1079 addresses to fall out of the directory.
1082 - Clients replace entry guards that were chosen more than a few months
1083 ago. This change should significantly improve client performance,
1084 especially once more people upgrade, since relays that have been
1085 a guard for a long time are currently overloaded.
1087 o Major bugfixes (on 0.2.0):
1088 - Finally fix the bug where dynamic-IP relays disappear when their
1089 IP address changes: directory mirrors were mistakenly telling
1090 them their old address if they asked via begin_dir, so they
1091 never got an accurate answer about their new address, so they
1092 just vanished after a day. For belt-and-suspenders, relays that
1093 don't set Address in their config now avoid using begin_dir for
1094 all direct connections. Should fix bugs 827, 883, and 900.
1095 - Relays were falling out of the networkstatus consensus for
1096 part of a day if they changed their local config but the
1097 authorities discarded their new descriptor as "not sufficiently
1098 different". Now directory authorities accept a descriptor as changed
1099 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
1101 - Avoid crashing in the presence of certain malformed descriptors.
1102 Found by lark, and by automated fuzzing.
1105 - When generating circuit events with verbose nicknames for
1106 controllers, try harder to look up nicknames for routers on a
1107 circuit. (Previously, we would look in the router descriptors we had
1108 for nicknames, but not in the consensus.) Partial fix for bug 941.
1109 - If the bridge config line doesn't specify a port, assume 443.
1110 This makes bridge lines a bit smaller and easier for users to
1112 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
1113 bytes (aka 20KB/s), to match our documentation. Also update
1114 directory authorities so they always assign the Fast flag to relays
1115 with 20KB/s of capacity. Now people running relays won't suddenly
1116 find themselves not seeing any use, if the network gets faster
1118 - Update to the "April 3 2009" ip-to-country file.
1121 - Avoid trying to print raw memory to the logs when we decide to
1122 give up on downloading a given relay descriptor. Bugfix on
1124 - In tor-resolve, when the Tor client to use is specified by
1125 <hostname>:<port>, actually use the specified port rather than
1126 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
1127 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
1128 - When starting with a cache over a few days old, do not leak
1129 memory for the obsolete router descriptors in it. Bugfix on
1131 - Avoid double-free on list of successfully uploaded hidden
1132 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
1133 - Change memarea_strndup() implementation to work even when
1134 duplicating a string at the end of a page. This bug was
1135 harmless for now, but could have meant crashes later. Fix by
1136 lark. Bugfix on 0.2.1.1-alpha.
1137 - Limit uploaded directory documents to be 16M rather than 500K.
1138 The directory authorities were refusing v3 consensus votes from
1139 other authorities, since the votes are now 504K. Fixes bug 959;
1140 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
1141 - Directory authorities should never send a 503 "busy" response to
1142 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
1146 Changes in version 0.2.1.13-alpha - 2009-03-09
1147 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
1148 cleanups. We're finally getting close to a release candidate.
1151 - Correctly update the list of which countries we exclude as
1152 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
1153 lark. Bugfix on 0.2.1.6-alpha.
1155 o Minor bugfixes (on 0.2.0.x and earlier):
1156 - Automatically detect MacOSX versions earlier than 10.4.0, and
1157 disable kqueue from inside Tor when running with these versions.
1158 We previously did this from the startup script, but that was no
1159 help to people who didn't use the startup script. Resolves bug 863.
1160 - When we had picked an exit node for a connection, but marked it as
1161 "optional", and it turned out we had no onion key for the exit,
1162 stop wanting that exit and try again. This situation may not
1163 be possible now, but will probably become feasible with proposal
1164 158. Spotted by rovv. Fixes another case of bug 752.
1165 - Clients no longer cache certificates for authorities they do not
1166 recognize. Bugfix on 0.2.0.9-alpha.
1167 - When we can't transmit a DNS request due to a network error, retry
1168 it after a while, and eventually transmit a failing response to
1169 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
1170 - If the controller claimed responsibility for a stream, but that
1171 stream never finished making its connection, it would live
1172 forever in circuit_wait state. Now we close it after SocksTimeout
1173 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
1174 - Drop begin cells to a hidden service if they come from the middle
1175 of a circuit. Patch from lark.
1176 - When we erroneously receive two EXTEND cells for the same circuit
1177 ID on the same connection, drop the second. Patch from lark.
1178 - Fix a crash that occurs on exit nodes when a nameserver request
1179 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
1180 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
1182 - Do not assume that a stack-allocated character array will be
1183 64-bit aligned on platforms that demand that uint64_t access is
1184 aligned. Possible fix for bug 604.
1185 - Parse dates and IPv4 addresses in a locale- and libc-independent
1186 manner, to avoid platform-dependent behavior on malformed input.
1187 - Build correctly when configured to build outside the main source
1188 path. Patch from Michael Gold.
1189 - We were already rejecting relay begin cells with destination port
1190 of 0. Now also reject extend cells with destination port or address
1191 of 0. Suggested by lark.
1193 o Minor bugfixes (on 0.2.1.x):
1194 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
1195 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
1196 - If we're an exit node, scrub the IP address to which we are exiting
1197 in the logs. Bugfix on 0.2.1.8-alpha.
1200 - On Linux, use the prctl call to re-enable core dumps when the user
1202 - New controller event NEWCONSENSUS that lists the networkstatus
1203 lines for every recommended relay. Now controllers like Torflow
1204 can keep up-to-date on which relays they should be using.
1205 - Update to the "February 26 2009" ip-to-country file.
1208 Changes in version 0.2.0.34 - 2009-02-08
1209 Tor 0.2.0.34 features several more security-related fixes. You should
1210 upgrade, especially if you run an exit relay (remote crash) or a
1211 directory authority (remote infinite loop), or you're on an older
1212 (pre-XP) or not-recently-patched Windows (remote exploit).
1214 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
1215 have many known flaws, and nobody should be using them. You should
1216 upgrade. If you're using a Linux or BSD and its packages are obsolete,
1217 stop using those packages and upgrade anyway.
1220 - Fix an infinite-loop bug on handling corrupt votes under certain
1221 circumstances. Bugfix on 0.2.0.8-alpha.
1222 - Fix a temporary DoS vulnerability that could be performed by
1223 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
1224 - Avoid a potential crash on exit nodes when processing malformed
1225 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
1226 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
1227 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
1230 - Fix compilation on systems where time_t is a 64-bit integer.
1231 Patch from Matthias Drochner.
1232 - Don't consider expiring already-closed client connections. Fixes
1233 bug 893. Bugfix on 0.0.2pre20.
1236 Changes in version 0.2.1.12-alpha - 2009-02-08
1237 Tor 0.2.1.12-alpha features several more security-related fixes. You
1238 should upgrade, especially if you run an exit relay (remote crash) or
1239 a directory authority (remote infinite loop), or you're on an older
1240 (pre-XP) or not-recently-patched Windows (remote exploit). It also
1241 includes a big pile of minor bugfixes and cleanups.
1244 - Fix an infinite-loop bug on handling corrupt votes under certain
1245 circumstances. Bugfix on 0.2.0.8-alpha.
1246 - Fix a temporary DoS vulnerability that could be performed by
1247 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
1248 - Avoid a potential crash on exit nodes when processing malformed
1249 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
1252 - Let controllers actually ask for the "clients_seen" event for
1253 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
1254 reported by Matt Edman.
1255 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
1257 - Fix a bug in address parsing that was preventing bridges or hidden
1258 service targets from being at IPv6 addresses.
1259 - Solve a bug that kept hardware crypto acceleration from getting
1260 enabled when accounting was turned on. Fixes bug 907. Bugfix on
1262 - Remove a bash-ism from configure.in to build properly on non-Linux
1263 platforms. Bugfix on 0.2.1.1-alpha.
1264 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
1265 headers. Bugfix on 0.2.0.10-alpha.
1266 - Don't consider expiring already-closed client connections. Fixes
1267 bug 893. Bugfix on 0.0.2pre20.
1268 - Fix another interesting corner-case of bug 891 spotted by rovv:
1269 Previously, if two hosts had different amounts of clock drift, and
1270 one of them created a new connection with just the wrong timing,
1271 the other might decide to deprecate the new connection erroneously.
1272 Bugfix on 0.1.1.13-alpha.
1273 - Resolve a very rare crash bug that could occur when the user forced
1274 a nameserver reconfiguration during the middle of a nameserver
1275 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
1276 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
1277 Bugfix on 0.2.1.7-alpha.
1278 - If we're using bridges and our network goes away, be more willing
1279 to forgive our bridges and try again when we get an application
1280 request. Bugfix on 0.2.0.x.
1283 - Support platforms where time_t is 64 bits long. (Congratulations,
1284 NetBSD!) Patch from Matthias Drochner.
1285 - Add a 'getinfo status/clients-seen' controller command, in case
1286 controllers want to hear clients_seen events but connect late.
1289 - Disable GCC's strict alias optimization by default, to avoid the
1290 likelihood of its introducing subtle bugs whenever our code violates
1291 the letter of C99's alias rules.
1294 Changes in version 0.2.0.33 - 2009-01-21
1295 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
1296 useful to users. It also finally fixes a bug where a relay or client
1297 that's been off for many days would take a long time to bootstrap.
1299 This update also fixes an important security-related bug reported by
1300 Ilja van Sprundel. You should upgrade. (We'll send out more details
1301 about the bug once people have had some time to upgrade.)
1304 - Fix a heap-corruption bug that may be remotely triggerable on
1305 some platforms. Reported by Ilja van Sprundel.
1308 - When a stream at an exit relay is in state "resolving" or
1309 "connecting" and it receives an "end" relay cell, the exit relay
1310 would silently ignore the end cell and not close the stream. If
1311 the client never closes the circuit, then the exit relay never
1312 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
1314 - When sending CREATED cells back for a given circuit, use a 64-bit
1315 connection ID to find the right connection, rather than an addr:port
1316 combination. Now that we can have multiple OR connections between
1317 the same ORs, it is no longer possible to use addr:port to uniquely
1318 identify a connection.
1319 - Bridge relays that had DirPort set to 0 would stop fetching
1320 descriptors shortly after startup, and then briefly resume
1321 after a new bandwidth test and/or after publishing a new bridge
1322 descriptor. Bridge users that try to bootstrap from them would
1323 get a recent networkstatus but would get descriptors from up to
1324 18 hours earlier, meaning most of the descriptors were obsolete
1325 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
1326 - Prevent bridge relays from serving their 'extrainfo' document
1327 to anybody who asks, now that extrainfo docs include potentially
1328 sensitive aggregated client geoip summaries. Bugfix on
1330 - If the cached networkstatus consensus is more than five days old,
1331 discard it rather than trying to use it. In theory it could be
1332 useful because it lists alternate directory mirrors, but in practice
1333 it just means we spend many minutes trying directory mirrors that
1334 are long gone from the network. Also discard router descriptors as
1335 we load them if they are more than five days old, since the onion
1336 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
1339 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
1340 could make gcc generate non-functional binary search code. Bugfix
1342 - Build correctly on platforms without socklen_t.
1343 - Compile without warnings on solaris.
1344 - Avoid potential crash on internal error during signature collection.
1345 Fixes bug 864. Patch from rovv.
1346 - Correct handling of possible malformed authority signing key
1347 certificates with internal signature types. Fixes bug 880.
1348 Bugfix on 0.2.0.3-alpha.
1349 - Fix a hard-to-trigger resource leak when logging credential status.
1351 - When we can't initialize DNS because the network is down, do not
1352 automatically stop Tor from starting. Instead, we retry failed
1353 dns_init() every 10 minutes, and change the exit policy to reject
1354 *:* until one succeeds. Fixes bug 691.
1355 - Use 64 bits instead of 32 bits for connection identifiers used with
1356 the controller protocol, to greatly reduce risk of identifier reuse.
1357 - When we're choosing an exit node for a circuit, and we have
1358 no pending streams, choose a good general exit rather than one that
1359 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
1360 - Fix another case of assuming, when a specific exit is requested,
1361 that we know more than the user about what hosts it allows.
1362 Fixes one case of bug 752. Patch from rovv.
1363 - Clip the MaxCircuitDirtiness config option to a minimum of 10
1364 seconds. Warn the user if lower values are given in the
1365 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
1366 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
1367 user if lower values are given in the configuration. Bugfix on
1368 0.1.1.17-rc. Patch by Sebastian.
1369 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
1370 the cache because we already had a v0 descriptor with the same ID.
1371 Bugfix on 0.2.0.18-alpha.
1372 - Fix a race condition when freeing keys shared between main thread
1373 and CPU workers that could result in a memory leak. Bugfix on
1374 0.1.0.1-rc. Fixes bug 889.
1375 - Send a valid END cell back when a client tries to connect to a
1376 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
1377 840. Patch from rovv.
1378 - Check which hops rendezvous stream cells are associated with to
1379 prevent possible guess-the-streamid injection attacks from
1380 intermediate hops. Fixes another case of bug 446. Based on patch
1382 - If a broken client asks a non-exit router to connect somewhere,
1383 do not even do the DNS lookup before rejecting the connection.
1384 Fixes another case of bug 619. Patch from rovv.
1385 - When a relay gets a create cell it can't decrypt (e.g. because it's
1386 using the wrong onion key), we were dropping it and letting the
1387 client time out. Now actually answer with a destroy cell. Fixes
1388 bug 904. Bugfix on 0.0.2pre8.
1390 o Minor bugfixes (hidden services):
1391 - Do not throw away existing introduction points on SIGHUP. Bugfix on
1392 0.0.6pre1. Patch by Karsten. Fixes bug 874.
1395 - Report the case where all signatures in a detached set are rejected
1396 differently than the case where there is an error handling the
1398 - When we realize that another process has modified our cached
1399 descriptors, print out a more useful error message rather than
1400 triggering an assertion. Fixes bug 885. Patch from Karsten.
1401 - Implement the 0x20 hack to better resist DNS poisoning: set the
1402 case on outgoing DNS requests randomly, and reject responses that do
1403 not match the case correctly. This logic can be disabled with the
1404 ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
1405 of servers that do not reliably preserve case in replies. See
1406 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
1408 - Check DNS replies for more matching fields to better resist DNS
1410 - Never use OpenSSL compression: it wastes RAM and CPU trying to
1411 compress cells, which are basically all encrypted, compressed, or
1415 Changes in version 0.2.1.11-alpha - 2009-01-20
1416 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
1417 week it will take a long time to bootstrap again" bug. It also fixes
1418 an important security-related bug reported by Ilja van Sprundel. You
1419 should upgrade. (We'll send out more details about the bug once people
1420 have had some time to upgrade.)
1423 - Fix a heap-corruption bug that may be remotely triggerable on
1424 some platforms. Reported by Ilja van Sprundel.
1427 - Discard router descriptors as we load them if they are more than
1428 five days old. Otherwise if Tor is off for a long time and then
1429 starts with cached descriptors, it will try to use the onion
1430 keys in those obsolete descriptors when building circuits. Bugfix
1431 on 0.2.0.x. Fixes bug 887.
1434 - Try to make sure that the version of Libevent we're running with
1435 is binary-compatible with the one we built with. May address bug
1437 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
1438 for bug 905. Bugfix on 0.2.1.7-alpha.
1439 - Add a new --enable-local-appdata configuration switch to change
1440 the default location of the datadir on win32 from APPDATA to
1441 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
1442 entirely. Patch from coderman.
1445 - Make outbound DNS packets respect the OutboundBindAddress setting.
1446 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
1447 - When our circuit fails at the first hop (e.g. we get a destroy
1448 cell back), avoid using that OR connection anymore, and also
1449 tell all the one-hop directory requests waiting for it that they
1450 should fail. Bugfix on 0.2.1.3-alpha.
1451 - In the torify(1) manpage, mention that tsocks will leak your
1455 Changes in version 0.2.1.10-alpha - 2009-01-06
1456 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
1457 would make the bridge relay not so useful if it had DirPort set to 0,
1458 and one that could let an attacker learn a little bit of information
1459 about the bridge's users), and a bug that would cause your Tor relay
1460 to ignore a circuit create request it can't decrypt (rather than reply
1461 with an error). It also fixes a wide variety of other bugs.
1464 - If the cached networkstatus consensus is more than five days old,
1465 discard it rather than trying to use it. In theory it could
1466 be useful because it lists alternate directory mirrors, but in
1467 practice it just means we spend many minutes trying directory
1468 mirrors that are long gone from the network. Helps bug 887 a bit;
1470 - Bridge relays that had DirPort set to 0 would stop fetching
1471 descriptors shortly after startup, and then briefly resume
1472 after a new bandwidth test and/or after publishing a new bridge
1473 descriptor. Bridge users that try to bootstrap from them would
1474 get a recent networkstatus but would get descriptors from up to
1475 18 hours earlier, meaning most of the descriptors were obsolete
1476 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
1477 - Prevent bridge relays from serving their 'extrainfo' document
1478 to anybody who asks, now that extrainfo docs include potentially
1479 sensitive aggregated client geoip summaries. Bugfix on
1483 - New controller event "clients_seen" to report a geoip-based summary
1484 of which countries we've seen clients from recently. Now controllers
1485 like Vidalia can show bridge operators that they're actually making
1487 - Build correctly against versions of OpenSSL 0.9.8 or later built
1488 without support for deprecated functions.
1489 - Update to the "December 19 2008" ip-to-country file.
1491 o Minor bugfixes (on 0.2.0.x):
1492 - Authorities now vote for the Stable flag for any router whose
1493 weighted MTBF is at least 5 days, regardless of the mean MTBF.
1494 - Do not remove routers as too old if we do not have any consensus
1495 document. Bugfix on 0.2.0.7-alpha.
1496 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
1497 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
1498 - When an exit relay resolves a stream address to a local IP address,
1499 do not just keep retrying that same exit relay over and
1500 over. Instead, just close the stream. Addresses bug 872. Bugfix
1501 on 0.2.0.32. Patch from rovv.
1502 - If a hidden service sends us an END cell, do not consider
1503 retrying the connection; just close it. Patch from rovv.
1504 - When we made bridge authorities stop serving bridge descriptors over
1505 unencrypted links, we also broke DirPort reachability testing for
1506 bridges. So bridges with a non-zero DirPort were printing spurious
1507 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
1508 - When a relay gets a create cell it can't decrypt (e.g. because it's
1509 using the wrong onion key), we were dropping it and letting the
1510 client time out. Now actually answer with a destroy cell. Fixes
1511 bug 904. Bugfix on 0.0.2pre8.
1512 - Squeeze 2-5% out of client performance (according to oprofile) by
1513 improving the implementation of some policy-manipulation functions.
1515 o Minor bugfixes (on 0.2.1.x):
1516 - Make get_interface_address() function work properly again; stop
1517 guessing the wrong parts of our address as our address.
1518 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
1519 send on that circuit. Otherwise we might violate the proposal-110
1520 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
1522 - When we're sending non-EXTEND cells to the first hop in a circuit,
1523 for example to use an encrypted directory connection, we don't need
1524 to use RELAY_EARLY cells: the first hop knows what kind of cell
1525 it is, and nobody else can even see the cell type. Conserving
1526 RELAY_EARLY cells makes it easier to cannibalize circuits like
1528 - Stop logging nameserver addresses in reverse order.
1529 - If we are retrying a directory download slowly over and over, do
1530 not automatically give up after the 254th failure. Bugfix on
1532 - Resume reporting accurate "stream end" reasons to the local control
1533 port. They were lost in the changes for Proposal 148. Bugfix on
1536 o Deprecated and removed features:
1537 - The old "tor --version --version" command, which would print out
1538 the subversion "Id" of most of the source files, is now removed. It
1539 turned out to be less useful than we'd expected, and harder to
1542 o Code simplifications and refactoring:
1543 - Change our header file guard macros to be less likely to conflict
1544 with system headers. Adam Langley noticed that we were conflicting
1545 with log.h on Android.
1546 - Tool-assisted documentation cleanup. Nearly every function or
1547 static variable in Tor should have its own documentation now.
1550 Changes in version 0.2.1.9-alpha - 2008-12-25
1551 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
1553 o New directory authorities:
1554 - gabelmoo (the authority run by Karsten Loesing) now has a new
1558 - Never use a connection with a mismatched address to extend a
1559 circuit, unless that connection is canonical. A canonical
1560 connection is one whose address is authenticated by the router's
1561 identity key, either in a NETINFO cell or in a router descriptor.
1562 - Avoid a possible memory corruption bug when receiving hidden service
1563 descriptors. Bugfix on 0.2.1.6-alpha.
1566 - Fix a logic error that would automatically reject all but the first
1567 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
1568 part of bug 813/868. Bug spotted by coderman.
1569 - When a stream at an exit relay is in state "resolving" or
1570 "connecting" and it receives an "end" relay cell, the exit relay
1571 would silently ignore the end cell and not close the stream. If
1572 the client never closes the circuit, then the exit relay never
1573 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
1575 - When we can't initialize DNS because the network is down, do not
1576 automatically stop Tor from starting. Instead, retry failed
1577 dns_init() every 10 minutes, and change the exit policy to reject
1578 *:* until one succeeds. Fixes bug 691.
1581 - Give a better error message when an overzealous init script says
1582 "sudo -u username tor --user username". Makes Bug 882 easier for
1584 - When a directory authority gives us a new guess for our IP address,
1585 log which authority we used. Hopefully this will help us debug
1586 the recent complaints about bad IP address guesses.
1587 - Detect svn revision properly when we're using git-svn.
1588 - Try not to open more than one descriptor-downloading connection
1589 to an authority at once. This should reduce load on directory
1590 authorities. Fixes bug 366.
1591 - Add cross-certification to newly generated certificates, so that
1592 a signing key is enough information to look up a certificate.
1593 Partial implementation of proposal 157.
1594 - Start serving certificates by <identity digest, signing key digest>
1595 pairs. Partial implementation of proposal 157.
1596 - Clients now never report any stream end reason except 'MISC'.
1597 Implements proposal 148.
1598 - On platforms with a maximum syslog string length, truncate syslog
1599 messages to that length ourselves, rather than relying on the
1600 system to do it for us.
1601 - Optimize out calls to time(NULL) that occur for every IO operation,
1602 or for every cell. On systems where time() is a slow syscall,
1603 this fix will be slightly helpful.
1604 - Exit servers can now answer resolve requests for ip6.arpa addresses.
1605 - When we download a descriptor that we then immediately (as
1606 a directory authority) reject, do not retry downloading it right
1607 away. Should save some bandwidth on authorities. Fix for bug
1608 888. Patch by Sebastian Hahn.
1609 - When a download gets us zero good descriptors, do not notify
1610 Tor that new directory information has arrived.
1611 - Avoid some nasty corner cases in the logic for marking connections
1612 as too old or obsolete or noncanonical for circuits. Partial
1615 o Minor features (controller):
1616 - New CONSENSUS_ARRIVED event to note when a new consensus has
1617 been fetched and validated.
1618 - When we realize that another process has modified our cached
1619 descriptors file, print out a more useful error message rather
1620 than triggering an assertion. Fixes bug 885. Patch from Karsten.
1621 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
1622 controllers to prevent SIGHUP from reloading the
1623 configuration. Fixes bug 856.
1626 - Resume using the correct "REASON=" stream when telling the
1627 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
1628 - When a canonical connection appears later in our internal list
1629 than a noncanonical one for a given OR ID, always use the
1630 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
1632 - Clip the MaxCircuitDirtiness config option to a minimum of 10
1633 seconds. Warn the user if lower values are given in the
1634 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
1635 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
1636 user if lower values are given in the configuration. Bugfix on
1637 0.1.1.17-rc. Patch by Sebastian.
1638 - Fix a race condition when freeing keys shared between main thread
1639 and CPU workers that could result in a memory leak. Bugfix on
1640 0.1.0.1-rc. Fixes bug 889.
1642 o Minor bugfixes (hidden services):
1643 - Do not throw away existing introduction points on SIGHUP (bugfix on
1644 0.0.6pre1); also, do not stall hidden services because we're
1645 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
1646 by John Brooks. Patch by Karsten. Fixes bug 874.
1647 - Fix a memory leak when we decline to add a v2 rendezvous
1648 descriptor to the cache because we already had a v0 descriptor
1649 with the same ID. Bugfix on 0.2.0.18-alpha.
1651 o Deprecated and removed features:
1652 - RedirectExits has been removed. It was deprecated since
1654 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
1655 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
1656 - Cell pools are now always enabled; --disable-cell-pools is ignored.
1658 o Code simplifications and refactoring:
1659 - Rename the confusing or_is_obsolete field to the more appropriate
1660 is_bad_for_new_circs, and move it to or_connection_t where it
1662 - Move edge-only flags from connection_t to edge_connection_t: not
1663 only is this better coding, but on machines of plausible alignment,
1664 it should save 4-8 bytes per connection_t. "Every little bit helps."
1665 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
1666 for consistency; keep old option working for backward compatibility.
1667 - Simplify the code for finding connections to use for a circuit.
1670 Changes in version 0.2.1.8-alpha - 2008-12-08
1671 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
1672 builds better on unusual platforms like Solaris and old OS X, and
1673 fixes a variety of other issues.
1676 - New DirPortFrontPage option that takes an html file and publishes
1677 it as "/" on the DirPort. Now relay operators can provide a
1678 disclaimer without needing to set up a separate webserver. There's
1679 a sample disclaimer in contrib/tor-exit-notice.html.
1682 - When the client is choosing entry guards, now it selects at most
1683 one guard from a given relay family. Otherwise we could end up with
1684 all of our entry points into the network run by the same operator.
1685 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
1688 - Fix a DOS opportunity during the voting signature collection process
1689 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
1690 - Fix a possible segfault when establishing an exit connection. Bugfix
1694 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
1696 - Made Tor a little less aggressive about deleting expired
1697 certificates. Partial fix for bug 854.
1698 - Stop doing unaligned memory access that generated bus errors on
1699 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
1700 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
1701 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
1702 - Make USR2 log-level switch take effect immediately. Bugfix on
1704 - If one win32 nameserver fails to get added, continue adding the
1705 rest, and don't automatically fail.
1706 - Use fcntl() for locking when flock() is not available. Should fix
1707 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
1708 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
1709 could make gcc generate non-functional binary search code. Bugfix
1711 - Build correctly on platforms without socklen_t.
1712 - Avoid potential crash on internal error during signature collection.
1713 Fixes bug 864. Patch from rovv.
1714 - Do not use C's stdio library for writing to log files. This will
1715 improve logging performance by a minute amount, and will stop
1716 leaking fds when our disk is full. Fixes bug 861.
1717 - Stop erroneous use of O_APPEND in cases where we did not in fact
1718 want to re-seek to the end of a file before every last write().
1719 - Correct handling of possible malformed authority signing key
1720 certificates with internal signature types. Fixes bug 880. Bugfix
1722 - Fix a hard-to-trigger resource leak when logging credential status.
1726 - Directory mirrors no longer fetch the v1 directory or
1727 running-routers files. They are obsolete, and nobody asks for them
1728 anymore. This is the first step to making v1 authorities obsolete.
1730 o Minor features (controller):
1731 - Return circuit purposes in response to GETINFO circuit-status. Fixes
1735 Changes in version 0.2.0.32 - 2008-11-20
1736 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
1737 packages (and maybe other packages) noticed by Theo de Raadt, fixes
1738 a smaller security flaw that might allow an attacker to access local
1739 services, further improves hidden service performance, and fixes a
1740 variety of other issues.
1743 - The "User" and "Group" config options did not clear the
1744 supplementary group entries for the Tor process. The "User" option
1745 is now more robust, and we now set the groups to the specified
1746 user's primary group. The "Group" option is now ignored. For more
1747 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
1748 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
1749 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
1750 - The "ClientDNSRejectInternalAddresses" config option wasn't being
1751 consistently obeyed: if an exit relay refuses a stream because its
1752 exit policy doesn't allow it, we would remember what IP address
1753 the relay said the destination address resolves to, even if it's
1754 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
1757 - Fix a DOS opportunity during the voting signature collection process
1758 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
1760 o Major bugfixes (hidden services):
1761 - When fetching v0 and v2 rendezvous service descriptors in parallel,
1762 we were failing the whole hidden service request when the v0
1763 descriptor fetch fails, even if the v2 fetch is still pending and
1764 might succeed. Similarly, if the last v2 fetch fails, we were
1765 failing the whole hidden service request even if a v0 fetch is
1766 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
1767 - When extending a circuit to a hidden service directory to upload a
1768 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
1769 requests failed, because the router descriptor has not been
1770 downloaded yet. In these cases, do not attempt to upload the
1771 rendezvous descriptor, but wait until the router descriptor is
1772 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
1773 descriptor from a hidden service directory for which the router
1774 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
1778 - Fix several infrequent memory leaks spotted by Coverity.
1779 - When testing for libevent functions, set the LDFLAGS variable
1780 correctly. Found by Riastradh.
1781 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
1782 bootstrapping with tunneled directory connections. Bugfix on
1783 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
1784 - When asked to connect to A.B.exit:80, if we don't know the IP for A
1785 and we know that server B rejects most-but-not all connections to
1786 port 80, we would previously reject the connection. Now, we assume
1787 the user knows what they were asking for. Fixes bug 752. Bugfix
1788 on 0.0.9rc5. Diagnosed by BarkerJr.
1789 - If we overrun our per-second write limits a little, count this as
1790 having used up our write allocation for the second, and choke
1791 outgoing directory writes. Previously, we had only counted this when
1792 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
1793 Bugfix on 0.2.0.x (??).
1794 - Remove the old v2 directory authority 'lefkada' from the default
1795 list. It has been gone for many months.
1796 - Stop doing unaligned memory access that generated bus errors on
1797 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
1798 - Make USR2 log-level switch take effect immediately. Bugfix on
1801 o Minor bugfixes (controller):
1802 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
1803 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
1806 Changes in version 0.2.1.7-alpha - 2008-11-08
1807 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
1808 packages (and maybe other packages) noticed by Theo de Raadt, fixes
1809 a smaller security flaw that might allow an attacker to access local
1810 services, adds better defense against DNS poisoning attacks on exit
1811 relays, further improves hidden service performance, and fixes a
1812 variety of other issues.
1815 - The "ClientDNSRejectInternalAddresses" config option wasn't being
1816 consistently obeyed: if an exit relay refuses a stream because its
1817 exit policy doesn't allow it, we would remember what IP address
1818 the relay said the destination address resolves to, even if it's
1819 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
1820 - The "User" and "Group" config options did not clear the
1821 supplementary group entries for the Tor process. The "User" option
1822 is now more robust, and we now set the groups to the specified
1823 user's primary group. The "Group" option is now ignored. For more
1824 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
1825 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
1826 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
1827 - Do not use or believe expired v3 authority certificates. Patch
1828 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
1831 - Now NodeFamily and MyFamily config options allow spaces in
1832 identity fingerprints, so it's easier to paste them in.
1833 Suggested by Lucky Green.
1834 - Implement the 0x20 hack to better resist DNS poisoning: set the
1835 case on outgoing DNS requests randomly, and reject responses that do
1836 not match the case correctly. This logic can be disabled with the
1837 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
1838 of servers that do not reliably preserve case in replies. See
1839 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
1841 - Preserve case in replies to DNSPort requests in order to support
1842 the 0x20 hack for resisting DNS poisoning attacks.
1844 o Hidden service performance improvements:
1845 - When the client launches an introduction circuit, retry with a
1846 new circuit after 30 seconds rather than 60 seconds.
1847 - Launch a second client-side introduction circuit in parallel
1848 after a delay of 15 seconds (based on work by Christian Wilms).
1849 - Hidden services start out building five intro circuits rather
1850 than three, and when the first three finish they publish a service
1851 descriptor using those. Now we publish our service descriptor much
1852 faster after restart.
1855 - Minor fix in the warning messages when you're having problems
1856 bootstrapping; also, be more forgiving of bootstrap problems when
1857 we're still making incremental progress on a given bootstrap phase.
1858 - When we're choosing an exit node for a circuit, and we have
1859 no pending streams, choose a good general exit rather than one that
1860 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
1861 - Send a valid END cell back when a client tries to connect to a
1862 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
1863 840. Patch from rovv.
1864 - If a broken client asks a non-exit router to connect somewhere,
1865 do not even do the DNS lookup before rejecting the connection.
1866 Fixes another case of bug 619. Patch from rovv.
1867 - Fix another case of assuming, when a specific exit is requested,
1868 that we know more than the user about what hosts it allows.
1869 Fixes another case of bug 752. Patch from rovv.
1870 - Check which hops rendezvous stream cells are associated with to
1871 prevent possible guess-the-streamid injection attacks from
1872 intermediate hops. Fixes another case of bug 446. Based on patch
1874 - Avoid using a negative right-shift when comparing 32-bit
1875 addresses. Possible fix for bug 845 and bug 811.
1876 - Make the assert_circuit_ok() function work correctly on circuits that
1877 have already been marked for close.
1878 - Fix read-off-the-end-of-string error in unit tests when decoding
1879 introduction points.
1880 - Fix uninitialized size field for memory area allocation: may improve
1881 memory performance during directory parsing.
1882 - Treat duplicate certificate fetches as failures, so that we do
1883 not try to re-fetch an expired certificate over and over and over.
1884 - Do not say we're fetching a certificate when we'll in fact skip it
1885 because of a pending download.
1888 Changes in version 0.2.1.6-alpha - 2008-09-30
1889 Tor 0.2.1.6-alpha further improves performance and robustness of
1890 hidden services, starts work on supporting per-country relay selection,
1891 and fixes a variety of smaller issues.
1894 - Implement proposal 121: make it possible to build hidden services
1895 that only certain clients are allowed to connect to. This is
1896 enforced at several points, so that unauthorized clients are unable
1897 to send INTRODUCE cells to the service, or even (depending on the
1898 type of authentication) to learn introduction points. This feature
1899 raises the bar for certain kinds of active attacks against hidden
1900 services. Code by Karsten Loesing.
1901 - Relays now store and serve v2 hidden service descriptors by default,
1902 i.e., the new default value for HidServDirectoryV2 is 1. This is
1903 the last step in proposal 114, which aims to make hidden service
1904 lookups more reliable.
1905 - Start work to allow node restrictions to include country codes. The
1906 syntax to exclude nodes in a country with country code XX is
1907 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
1908 refinement to decide what config options should take priority if
1909 you ask to both use a particular node and exclude it.
1910 - Allow ExitNodes list to include IP ranges and country codes, just
1911 like the Exclude*Nodes lists. Patch from Robert Hogan.
1914 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
1915 Tor to fail to start if you had it configured to use a bridge
1916 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
1917 - When extending a circuit to a hidden service directory to upload a
1918 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
1919 requests failed, because the router descriptor had not been
1920 downloaded yet. In these cases, we now wait until the router
1921 descriptor is downloaded, and then retry. Likewise, clients
1922 now skip over a hidden service directory if they don't yet have
1923 its router descriptor, rather than futilely requesting it and
1924 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
1926 - When fetching v0 and v2 rendezvous service descriptors in parallel,
1927 we were failing the whole hidden service request when the v0
1928 descriptor fetch fails, even if the v2 fetch is still pending and
1929 might succeed. Similarly, if the last v2 fetch fails, we were
1930 failing the whole hidden service request even if a v0 fetch is
1931 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
1932 - DNS replies need to have names matching their requests, but
1933 these names should be in the questions section, not necessarily
1934 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
1937 - Update to the "September 1 2008" ip-to-country file.
1938 - Allow ports 465 and 587 in the default exit policy again. We had
1939 rejected them in 0.1.0.15, because back in 2005 they were commonly
1940 misconfigured and ended up as spam targets. We hear they are better
1941 locked down these days.
1942 - Use a lockfile to make sure that two Tor processes are not
1943 simultaneously running with the same datadir.
1944 - Serve the latest v3 networkstatus consensus via the control
1945 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
1946 - Better logging about stability/reliability calculations on directory
1948 - Drop the requirement to have an open dir port for storing and
1949 serving v2 hidden service descriptors.
1950 - Directory authorities now serve a /tor/dbg-stability.txt URL to
1951 help debug WFU and MTBF calculations.
1952 - Implement most of Proposal 152: allow specialized servers to permit
1953 single-hop circuits, and clients to use those servers to build
1954 single-hop circuits when using a specialized controller. Patch
1955 from Josh Albrecht. Resolves feature request 768.
1956 - Add a -p option to tor-resolve for specifying the SOCKS port: some
1957 people find host:port too confusing.
1958 - Make TrackHostExit mappings expire a while after their last use, not
1959 after their creation. Patch from Robert Hogan.
1960 - Provide circuit purposes along with circuit events to the controller.
1963 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
1965 - Fixed some memory leaks -- some quite frequent, some almost
1966 impossible to trigger -- based on results from Coverity.
1967 - When testing for libevent functions, set the LDFLAGS variable
1968 correctly. Found by Riastradh.
1969 - Fix an assertion bug in parsing policy-related options; possible fix
1971 - Catch and report a few more bootstrapping failure cases when Tor
1972 fails to establish a TCP connection. Cleanup on 0.2.1.x.
1973 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
1974 bootstrapping with tunneled directory connections. Bugfix on
1975 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
1976 - When asked to connect to A.B.exit:80, if we don't know the IP for A
1977 and we know that server B rejects most-but-not all connections to
1978 port 80, we would previously reject the connection. Now, we assume
1979 the user knows what they were asking for. Fixes bug 752. Bugfix
1980 on 0.0.9rc5. Diagnosed by BarkerJr.
1981 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
1982 service directories if they have no advertised dir port. Bugfix
1984 - If we overrun our per-second write limits a little, count this as
1985 having used up our write allocation for the second, and choke
1986 outgoing directory writes. Previously, we had only counted this when
1987 we had met our limits precisely. Fixes bug 824. Patch by rovv.
1988 Bugfix on 0.2.0.x (??).
1989 - Avoid a "0 divided by 0" calculation when calculating router uptime
1990 at directory authorities. Bugfix on 0.2.0.8-alpha.
1991 - Make DNS resolved controller events into "CLOSED", not
1992 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
1994 - Fix a bug where an unreachable relay would establish enough
1995 reachability testing circuits to do a bandwidth test -- if
1996 we already have a connection to the middle hop of the testing
1997 circuit, then it could establish the last hop by using the existing
1998 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
1999 circuits no longer use entry guards in 0.2.1.3-alpha.
2000 - If we have correct permissions on $datadir, we complain to stdout
2001 and fail to start. But dangerous permissions on
2002 $datadir/cached-status/ would cause us to open a log and complain
2003 there. Now complain to stdout and fail to start in both cases. Fixes
2004 bug 820, reported by seeess.
2005 - Remove the old v2 directory authority 'lefkada' from the default
2006 list. It has been gone for many months.
2008 o Code simplifications and refactoring:
2009 - Revise the connection_new functions so that a more typesafe variant
2010 exists. This will work better with Coverity, and let us find any
2011 actual mistakes we're making here.
2012 - Refactor unit testing logic so that dmalloc can be used sensibly
2013 with unit tests to check for memory leaks.
2014 - Move all hidden-service related fields from connection and circuit
2015 structure to substructures: this way they won't eat so much memory.
2018 Changes in version 0.2.0.31 - 2008-09-03
2019 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
2020 a big bug we're seeing where in rare cases traffic from one Tor stream
2021 gets mixed into another stream, and fixes a variety of smaller issues.
2024 - Make sure that two circuits can never exist on the same connection
2025 with the same circuit ID, even if one is marked for close. This
2026 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
2027 - Relays now reject risky extend cells: if the extend cell includes
2028 a digest of all zeroes, or asks to extend back to the relay that
2029 sent the extend cell, tear down the circuit. Ideas suggested
2031 - If not enough of our entry guards are available so we add a new
2032 one, we might use the new one even if it overlapped with the
2033 current circuit's exit relay (or its family). Anonymity bugfix
2034 pointed out by rovv.
2037 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
2038 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
2039 - Correctly detect the presence of the linux/netfilter_ipv4.h header
2040 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
2041 - Pick size of default geoip filename string correctly on windows.
2042 Fixes bug 806. Bugfix on 0.2.0.30.
2043 - Make the autoconf script accept the obsolete --with-ssl-dir
2044 option as an alias for the actually-working --with-openssl-dir
2045 option. Fix the help documentation to recommend --with-openssl-dir.
2046 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
2047 - When using the TransPort option on OpenBSD, and using the User
2048 option to change UID and drop privileges, make sure to open
2049 /dev/pf before dropping privileges. Fixes bug 782. Patch from
2050 Christopher Davis. Bugfix on 0.1.2.1-alpha.
2051 - Try to attach connections immediately upon receiving a RENDEZVOUS2
2052 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
2053 on the client side when connecting to a hidden service. Bugfix
2054 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
2055 - When closing an application-side connection because its circuit is
2056 getting torn down, generate the stream event correctly. Bugfix on
2057 0.1.2.x. Anonymous patch.
2060 Changes in version 0.2.1.5-alpha - 2008-08-31
2061 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
2062 in a lot of the infrastructure for adding authorization to hidden
2063 services, lays the groundwork for having clients read their load
2064 balancing information out of the networkstatus consensus rather than
2065 the individual router descriptors, addresses two potential anonymity
2066 issues, and fixes a variety of smaller issues.
2069 - Convert many internal address representations to optionally hold
2071 - Generate and accept IPv6 addresses in many protocol elements.
2072 - Make resolver code handle nameservers located at ipv6 addresses.
2073 - Begin implementation of proposal 121 ("Client authorization for
2074 hidden services"): configure hidden services with client
2075 authorization, publish descriptors for them, and configure
2076 authorization data for hidden services at clients. The next
2077 step is to actually access hidden services that perform client
2079 - More progress toward proposal 141: Network status consensus
2080 documents and votes now contain bandwidth information for each
2081 router and a summary of that router's exit policy. Eventually this
2082 will be used by clients so that they do not have to download every
2083 known descriptor before building circuits.
2085 o Major bugfixes (on 0.2.0.x and before):
2086 - When sending CREATED cells back for a given circuit, use a 64-bit
2087 connection ID to find the right connection, rather than an addr:port
2088 combination. Now that we can have multiple OR connections between
2089 the same ORs, it is no longer possible to use addr:port to uniquely
2090 identify a connection.
2091 - Relays now reject risky extend cells: if the extend cell includes
2092 a digest of all zeroes, or asks to extend back to the relay that
2093 sent the extend cell, tear down the circuit. Ideas suggested
2095 - If not enough of our entry guards are available so we add a new
2096 one, we might use the new one even if it overlapped with the
2097 current circuit's exit relay (or its family). Anonymity bugfix
2098 pointed out by rovv.
2101 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
2102 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
2103 - When using the TransPort option on OpenBSD, and using the User
2104 option to change UID and drop privileges, make sure to open /dev/pf
2105 before dropping privileges. Fixes bug 782. Patch from Christopher
2106 Davis. Bugfix on 0.1.2.1-alpha.
2107 - Correctly detect the presence of the linux/netfilter_ipv4.h header
2108 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
2109 - Add a missing safe_str() call for a debug log message.
2110 - Use 64 bits instead of 32 bits for connection identifiers used with
2111 the controller protocol, to greatly reduce risk of identifier reuse.
2112 - Make the autoconf script accept the obsolete --with-ssl-dir
2113 option as an alias for the actually-working --with-openssl-dir
2114 option. Fix the help documentation to recommend --with-openssl-dir.
2115 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
2118 - Rate-limit too-many-sockets messages: when they happen, they happen
2119 a lot. Resolves bug 748.
2120 - Resist DNS poisoning a little better by making sure that names in
2121 answer sections match.
2122 - Print the SOCKS5 error message string as well as the error code
2123 when a tor-resolve request fails. Patch from Jacob.
2126 Changes in version 0.2.1.4-alpha - 2008-08-04
2127 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
2130 - The address part of exit policies was not correctly written
2131 to router descriptors. This generated router descriptors that failed
2132 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
2134 - Tor triggered a false assert when extending a circuit to a relay
2135 but we already have a connection open to that relay. Noticed by
2136 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
2139 - Fix a hidden service logging bug: in some edge cases, the router
2140 descriptor of a previously picked introduction point becomes
2141 obsolete and we need to give up on it rather than continually
2142 complaining that it has become obsolete. Observed by xiando. Bugfix
2146 - Take out the TestVia config option, since it was a workaround for
2147 a bug that was fixed in Tor 0.1.1.21.
2150 Changes in version 0.2.1.3-alpha - 2008-08-03
2151 Tor 0.2.1.3-alpha implements most of the pieces to prevent
2152 infinite-length circuit attacks (see proposal 110); fixes a bug that
2153 might cause exit relays to corrupt streams they send back; allows
2154 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
2155 ExcludeExitNodes config options; and fixes a big pile of bugs.
2157 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
2158 - Send a bootstrap problem "warn" event on the first problem if the
2159 reason is NO_ROUTE (that is, our network is down).
2162 - Implement most of proposal 110: The first K cells to be sent
2163 along a circuit are marked as special "early" cells; only K "early"
2164 cells will be allowed. Once this code is universal, we can block
2165 certain kinds of DOS attack by requiring that EXTEND commands must
2166 be sent using an "early" cell.
2169 - Try to attach connections immediately upon receiving a RENDEZVOUS2
2170 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
2171 on the client side when connecting to a hidden service. Bugfix
2172 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
2173 - Ensure that two circuits can never exist on the same connection
2174 with the same circuit ID, even if one is marked for close. This
2175 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
2178 - When relays do their initial bandwidth measurement, don't limit
2179 to just our entry guards for the test circuits. Otherwise we tend
2180 to have multiple test circuits going through a single entry guard,
2181 which makes our bandwidth test less accurate. Fixes part of bug 654;
2182 patch contributed by Josh Albrecht.
2183 - Add an ExcludeExitNodes option so users can list a set of nodes
2184 that should be be excluded from the exit node position, but
2185 allowed elsewhere. Implements proposal 151.
2186 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
2187 ExcludeNodes and ExcludeExitNodes lists.
2188 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
2189 be more efficient. Formerly it was quadratic in the number of
2190 servers; now it should be linear. Fixes bug 509.
2191 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
2192 and n_conn_id_digest fields into a separate structure that's
2193 only needed when the circuit has not yet attached to an n_conn.
2196 - Change the contrib/tor.logrotate script so it makes the new
2197 logs as "_tor:_tor" rather than the default, which is generally
2198 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
2199 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
2200 warnings (occasionally), but it can also cause the compiler to
2201 eliminate error-checking code. Suggested by Peter Gutmann.
2202 - When a hidden service is giving up on an introduction point candidate
2203 that was not included in the last published rendezvous descriptor,
2204 don't reschedule publication of the next descriptor. Fixes bug 763.
2206 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
2207 HiddenServiceExcludeNodes as obsolete: they never worked properly,
2208 and nobody claims to be using them. Fixes bug 754. Bugfix on
2209 0.1.0.1-rc. Patch from Christian Wilms.
2210 - Fix a small alignment and memory-wasting bug on buffer chunks.
2213 o Minor bugfixes (controller):
2214 - When closing an application-side connection because its circuit
2215 is getting torn down, generate the stream event correctly.
2216 Bugfix on 0.1.2.x. Anonymous patch.
2219 - Remove all backward-compatibility code to support relays running
2220 versions of Tor so old that they no longer work at all on the
2224 Changes in version 0.2.0.30 - 2008-07-15
2226 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
2227 warnings (occasionally), but it can also cause the compiler to
2228 eliminate error-checking code. Suggested by Peter Gutmann.
2231 Changes in version 0.2.0.29-rc - 2008-07-08
2232 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
2233 hidden-service performance bugs, and fixes a bunch of smaller bugs.
2236 - If you have more than one bridge but don't know their keys,
2237 you would only launch a request for the descriptor of the first one
2238 on your list. (Tor considered launching requests for the others, but
2239 found that it already had a connection on the way for $0000...0000
2240 so it didn't open another.) Bugfix on 0.2.0.x.
2241 - If you have more than one bridge but don't know their keys, and the
2242 connection to one of the bridges failed, you would cancel all
2243 pending bridge connections. (After all, they all have the same
2244 digest.) Bugfix on 0.2.0.x.
2245 - When a hidden service was trying to establish an introduction point,
2246 and Tor had built circuits preemptively for such purposes, we
2247 were ignoring all the preemptive circuits and launching a new one
2248 instead. Bugfix on 0.2.0.14-alpha.
2249 - When a hidden service was trying to establish an introduction point,
2250 and Tor *did* manage to reuse one of the preemptively built
2251 circuits, it didn't correctly remember which one it used,
2252 so it asked for another one soon after, until there were no
2253 more preemptive circuits, at which point it launched one from
2254 scratch. Bugfix on 0.0.9.x.
2255 - Make directory servers include the X-Your-Address-Is: http header in
2256 their responses even for begin_dir conns. Now clients who only
2257 ever use begin_dir connections still have a way to learn their IP
2258 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
2261 - Fix a macro/CPP interaction that was confusing some compilers:
2262 some GCCs don't like #if/#endif pairs inside macro arguments.
2264 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
2265 Fixes bug 704; fix from Steven Murdoch.
2266 - When opening /dev/null in finish_daemonize(), do not pass the
2267 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
2268 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
2269 - Correctly detect transparent proxy support on Linux hosts that
2270 require in.h to be included before netfilter_ipv4.h. Patch
2272 - Disallow session resumption attempts during the renegotiation
2273 stage of the v2 handshake protocol. Clients should never be trying
2274 session resumption at this point, but apparently some did, in
2275 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
2276 found by Geoff Goodell.
2279 Changes in version 0.2.1.2-alpha - 2008-06-20
2280 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
2281 make it easier to set up your own private Tor network; fixes several
2282 big bugs with using more than one bridge relay; fixes a big bug with
2283 offering hidden services quickly after Tor starts; and uses a better
2284 API for reporting potential bootstrapping problems to the controller.
2287 - New TestingTorNetwork config option to allow adjustment of
2288 previously constant values that, while reasonable, could slow
2289 bootstrapping. Implements proposal 135. Patch from Karsten.
2292 - If you have more than one bridge but don't know their digests,
2293 you would only learn a request for the descriptor of the first one
2294 on your list. (Tor considered launching requests for the others, but
2295 found that it already had a connection on the way for $0000...0000
2296 so it didn't open another.) Bugfix on 0.2.0.x.
2297 - If you have more than one bridge but don't know their digests,
2298 and the connection to one of the bridges failed, you would cancel
2299 all pending bridge connections. (After all, they all have the
2300 same digest.) Bugfix on 0.2.0.x.
2301 - When establishing a hidden service, introduction points that
2302 originate from cannibalized circuits are completely ignored and not
2303 included in rendezvous service descriptors. This might be another
2304 reason for delay in making a hidden service available. Bugfix
2305 from long ago (0.0.9.x?)
2308 - Allow OpenSSL to use dynamic locks if it wants.
2309 - When building a consensus, do not include routers that are down.
2310 This will cut down 30% to 40% on consensus size. Implements
2312 - In directory authorities' approved-routers files, allow
2313 fingerprints with or without space.
2314 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
2315 controller can query our current bootstrap state in case it attaches
2316 partway through and wants to catch up.
2317 - Send an initial "Starting" bootstrap status event, so we have a
2318 state to start out in.
2321 - Asking for a conditional consensus at .../consensus/<fingerprints>
2322 would crash a dirserver if it did not already have a
2323 consensus. Bugfix on 0.2.1.1-alpha.
2324 - Clean up some macro/CPP interactions: some GCC versions don't like
2325 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
2328 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
2329 - Directory authorities shouldn't complain about bootstrapping
2330 problems just because they do a lot of reachability testing and
2331 some of the connection attempts fail.
2332 - Start sending "count" and "recommendation" key/value pairs in
2333 bootstrap problem status events, so the controller can hear about
2334 problems even before Tor decides they're worth reporting for sure.
2335 - If you're using bridges, generate "bootstrap problem" warnings
2336 as soon as you run out of working bridges, rather than waiting
2337 for ten failures -- which will never happen if you have less than
2339 - If we close our OR connection because there's been a circuit
2340 pending on it for too long, we were telling our bootstrap status
2341 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
2344 Changes in version 0.2.1.1-alpha - 2008-06-13
2345 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
2346 were making the Tor process bloat especially on Linux; makes our TLS
2347 handshake blend in better; sends "bootstrap phase" status events to
2348 the controller, so it can keep the user informed of progress (and
2349 problems) fetching directory information and establishing circuits;
2350 and adds a variety of smaller features.
2353 - More work on making our TLS handshake blend in: modify the list
2354 of ciphers advertised by OpenSSL in client mode to even more
2355 closely resemble a common web browser. We cheat a little so that
2356 we can advertise ciphers that the locally installed OpenSSL doesn't
2358 - Start sending "bootstrap phase" status events to the controller,
2359 so it can keep the user informed of progress fetching directory
2360 information and establishing circuits. Also inform the controller
2361 if we think we're stuck at a particular bootstrap phase. Implements
2363 - Resume using OpenSSL's RAND_poll() for better (and more portable)
2364 cross-platform entropy collection again. We used to use it, then
2365 stopped using it because of a bug that could crash systems that
2366 called RAND_poll when they had a lot of fds open. It looks like the
2367 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
2368 at startup, and to call RAND_poll() when we reseed later only if
2369 we have a non-buggy OpenSSL version.
2372 - When we choose to abandon a new entry guard because we think our
2373 older ones might be better, close any circuits pending on that
2374 new entry guard connection. This fix should make us recover much
2375 faster when our network is down and then comes back. Bugfix on
2376 0.1.2.8-beta; found by lodger.
2378 o Memory fixes and improvements:
2379 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
2380 to avoid unused RAM in buffer chunks and memory pools.
2381 - Speed up parsing and cut down on memory fragmentation by using
2382 stack-style allocations for parsing directory objects. Previously,
2383 this accounted for over 40% of allocations from within Tor's code
2384 on a typical directory cache.
2385 - Use a Bloom filter rather than a digest-based set to track which
2386 descriptors we need to keep around when we're cleaning out old
2387 router descriptors. This speeds up the computation significantly,
2388 and may reduce fragmentation.
2389 - Reduce the default smartlist size from 32 to 16; it turns out that
2390 most smartlists hold around 8-12 elements tops.
2391 - Make dumpstats() log the fullness and size of openssl-internal
2393 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
2394 patch to their OpenSSL, turn it on to save memory on servers. This
2395 patch will (with any luck) get included in a mainline distribution
2397 - Never use OpenSSL compression: it wastes RAM and CPU trying to
2398 compress cells, which are basically all encrypted, compressed,
2402 - Stop reloading the router list from disk for no reason when we
2403 run out of reachable directory mirrors. Once upon a time reloading
2404 it would set the 'is_running' flag back to 1 for them. It hasn't
2405 done that for a long time.
2406 - In very rare situations new hidden service descriptors were
2407 published earlier than 30 seconds after the last change to the
2408 service. (We currently think that a hidden service descriptor
2409 that's been stable for 30 seconds is worth publishing.)
2412 - Allow separate log levels to be configured for different logging
2413 domains. For example, this allows one to log all notices, warnings,
2414 or errors, plus all memory management messages of level debug or
2415 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
2416 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
2417 and stop using a warning that had become unfixably verbose under
2419 - New --hush command-line option similar to --quiet. While --quiet
2420 disables all logging to the console on startup, --hush limits the
2421 output to messages of warning and error severity.
2422 - Servers support a new URL scheme for consensus downloads that
2423 allows the client to specify which authorities are trusted.
2424 The server then only sends the consensus if the client will trust
2425 it. Otherwise a 404 error is sent back. Clients use this
2426 new scheme when the server supports it (meaning it's running
2427 0.2.1.1-alpha or later). Implements proposal 134.
2428 - New configure/torrc options (--enable-geoip-stats,
2429 DirRecordUsageByCountry) to record how many IPs we've served
2430 directory info to in each country code, how many status documents
2431 total we've sent to each country code, and what share of the total
2432 directory requests we should expect to see.
2433 - Use the TLS1 hostname extension to more closely resemble browser
2435 - Lots of new unit tests.
2436 - Add a macro to implement the common pattern of iterating through
2437 two parallel lists in lockstep.
2440 Changes in version 0.2.0.28-rc - 2008-06-13
2441 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
2442 performance bug, and fixes a bunch of smaller bugs.
2445 - Fix a bug where, when we were choosing the 'end stream reason' to
2446 put in our relay end cell that we send to the exit relay, Tor
2447 clients on Windows were sometimes sending the wrong 'reason'. The
2448 anonymity problem is that exit relays may be able to guess whether
2449 the client is running Windows, thus helping partition the anonymity
2450 set. Down the road we should stop sending reasons to exit relays,
2451 or otherwise prevent future versions of this bug.
2454 - While setting up a hidden service, some valid introduction circuits
2455 were overlooked and abandoned. This might be the reason for
2456 the long delay in making a hidden service available. Bugfix on
2460 - Update to the "June 9 2008" ip-to-country file.
2461 - Run 'make test' as part of 'make dist', so we stop releasing so
2462 many development snapshots that fail their unit tests.
2465 - When we're checking if we have enough dir info for each relay
2466 to begin establishing circuits, make sure that we actually have
2467 the descriptor listed in the consensus, not just any descriptor.
2469 - Bridge relays no longer print "xx=0" in their extrainfo document
2470 for every single country code in the geoip db. Bugfix on
2472 - Only warn when we fail to load the geoip file if we were planning to
2473 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
2474 - If we change our MaxAdvertisedBandwidth and then reload torrc,
2475 Tor won't realize it should publish a new relay descriptor. Fixes
2476 bug 688, reported by mfr. Bugfix on 0.1.2.x.
2477 - When we haven't had any application requests lately, don't bother
2478 logging that we have expired a bunch of descriptors. Bugfix
2480 - Make relay cells written on a connection count as non-padding when
2481 tracking how long a connection has been in use. Bugfix on
2482 0.2.0.1-alpha. Spotted by lodger.
2483 - Fix unit tests in 0.2.0.27-rc.
2484 - Fix compile on Windows.
2487 Changes in version 0.2.0.27-rc - 2008-06-03
2488 Tor 0.2.0.27-rc adds a few features we left out of the earlier
2489 release candidates. In particular, we now include an IP-to-country
2490 GeoIP database, so controllers can easily look up what country a
2491 given relay is in, and so bridge relays can give us some sanitized
2492 summaries about which countries are making use of bridges. (See proposal
2493 126-geoip-fetching.txt for details.)
2496 - Include an IP-to-country GeoIP file in the tarball, so bridge
2497 relays can report sanitized summaries of the usage they're seeing.
2500 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
2501 Robert Hogan. Fixes the first part of bug 681.
2502 - Make bridge authorities never serve extrainfo docs.
2503 - Add support to detect Libevent versions in the 1.4.x series
2505 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
2506 - Include a new contrib/tor-exit-notice.html file that exit relay
2507 operators can put on their website to help reduce abuse queries.
2510 - When tunneling an encrypted directory connection, and its first
2511 circuit fails, do not leave it unattached and ask the controller
2512 to deal. Fixes the second part of bug 681.
2513 - Make bridge authorities correctly expire old extrainfo documents
2517 Changes in version 0.2.0.26-rc - 2008-05-13
2518 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
2519 in Debian's OpenSSL packages. All users running any 0.2.0.x version
2520 should upgrade, whether they're running Debian or not.
2522 o Major security fixes:
2523 - Use new V3 directory authority keys on the tor26, gabelmoo, and
2524 moria1 V3 directory authorities. The old keys were generated with
2525 a vulnerable version of Debian's OpenSSL package, and must be
2526 considered compromised. Other authorities' keys were not generated
2527 with an affected version of OpenSSL.
2530 - List authority signatures as "unrecognized" based on DirServer
2531 lines, not on cert cache. Bugfix on 0.2.0.x.
2534 - Add a new V3AuthUseLegacyKey option to make it easier for
2535 authorities to change their identity keys if they have to.
2538 Changes in version 0.2.0.25-rc - 2008-04-23
2539 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
2542 - Remember to initialize threading before initializing logging.
2543 Otherwise, many BSD-family implementations will crash hard on
2544 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
2547 - Authorities correctly free policies on bad servers on
2548 exit. Fixes bug 672. Bugfix on 0.2.0.x.
2551 Changes in version 0.2.0.24-rc - 2008-04-22
2552 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
2553 v3 directory authority, makes relays with dynamic IP addresses and no
2554 DirPort notice more quickly when their IP address changes, fixes a few
2555 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
2557 o New directory authorities:
2558 - Take lefkada out of the list of v3 directory authorities, since
2559 it has been down for months.
2560 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
2564 - Detect address changes more quickly on non-directory mirror
2565 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
2567 o Minor features (security):
2568 - Reject requests for reverse-dns lookup of names that are in
2569 a private address space. Patch from lodger.
2570 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
2573 o Minor bugfixes (crashes):
2574 - Avoid a rare assert that can trigger when Tor doesn't have much
2575 directory information yet and it tries to fetch a v2 hidden
2576 service descriptor. Fixes bug 651, reported by nwf.
2577 - Initialize log mutex before initializing dmalloc. Otherwise,
2578 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
2579 - Use recursive pthread mutexes in order to avoid deadlock when
2580 logging debug-level messages to a controller. Bug spotted by nwf,
2581 bugfix on 0.2.0.16-alpha.
2583 o Minor bugfixes (resource management):
2584 - Keep address policies from leaking memory: start their refcount
2585 at 1, not 2. Bugfix on 0.2.0.16-alpha.
2586 - Free authority certificates on exit, so they don't look like memory
2587 leaks. Bugfix on 0.2.0.19-alpha.
2588 - Free static hashtables for policy maps and for TLS connections on
2589 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
2590 - Avoid allocating extra space when computing consensuses on 64-bit
2591 platforms. Bug spotted by aakova.
2593 o Minor bugfixes (misc):
2594 - Do not read the configuration file when we've only been told to
2595 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
2596 based on patch from Sebastian Hahn.
2597 - Exit relays that are used as a client can now reach themselves
2598 using the .exit notation, rather than just launching an infinite
2599 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
2600 - When attempting to open a logfile fails, tell us why.
2601 - Fix a dumb bug that was preventing us from knowing that we should
2602 preemptively build circuits to handle expected directory requests.
2603 Fixes bug 660. Bugfix on 0.1.2.x.
2604 - Warn less verbosely about clock skew from netinfo cells from
2605 untrusted sources. Fixes bug 663.
2606 - Make controller stream events for DNS requests more consistent,
2607 by adding "new stream" events for DNS requests, and removing
2608 spurious "stream closed" events" for cached reverse resolves.
2609 Patch from mwenge. Fixes bug 646.
2610 - Correctly notify one-hop connections when a circuit build has
2611 failed. Possible fix for bug 669. Found by lodger.
2614 Changes in version 0.2.0.23-rc - 2008-03-24
2615 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
2616 makes bootstrapping faster if the first directory mirror you contact
2617 is down. The bundles also include the new Vidalia 0.1.2 release.
2620 - When a tunneled directory request is made to a directory server
2621 that's down, notice after 30 seconds rather than 120 seconds. Also,
2622 fail any begindir streams that are pending on it, so they can
2623 retry elsewhere. This was causing multi-minute delays on bootstrap.
2626 Changes in version 0.2.0.22-rc - 2008-03-18
2627 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
2628 enables encrypted directory connections by default for non-relays, fixes
2629 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
2630 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
2633 - Enable encrypted directory connections by default for non-relays,
2634 so censor tools that block Tor directory connections based on their
2635 plaintext patterns will no longer work. This means Tor works in
2636 certain censored countries by default again.
2639 - Make sure servers always request certificates from clients during
2640 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
2641 - Do not enter a CPU-eating loop when a connection is closed in
2642 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
2643 diagnosed by lodger; bugfix on 0.2.0.20-rc.
2644 - Fix assertion failure that could occur when a blocked circuit
2645 became unblocked, and it had pending client DNS requests. Bugfix
2646 on 0.2.0.1-alpha. Fixes bug 632.
2648 o Minor bugfixes (on 0.1.2.x):
2649 - Generate "STATUS_SERVER" events rather than misspelled
2650 "STATUS_SEVER" events. Caught by mwenge.
2651 - When counting the number of bytes written on a TLS connection,
2652 look at the BIO actually used for writing to the network, not
2653 at the BIO used (sometimes) to buffer data for the network.
2654 Looking at different BIOs could result in write counts on the
2655 order of ULONG_MAX. Fixes bug 614.
2656 - On Windows, correctly detect errors when listing the contents of
2657 a directory. Fix from lodger.
2659 o Minor bugfixes (on 0.2.0.x):
2660 - Downgrade "sslv3 alert handshake failure" message to INFO.
2661 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
2662 left BandwidthRate and BandwidthBurst at the default, we would be
2663 silently limited by those defaults. Now raise them to match the
2664 RelayBandwidth* values.
2665 - Fix the SVK version detection logic to work correctly on a branch.
2666 - Make --enable-openbsd-malloc work correctly on Linux with alpha
2667 CPUs. Fixes bug 625.
2668 - Logging functions now check that the passed severity is sane.
2669 - Use proper log levels in the testsuite call of
2670 get_interface_address6().
2671 - When using a nonstandard malloc, do not use the platform values for
2672 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
2673 - Make the openbsd malloc code use 8k pages on alpha CPUs and
2675 - Detect mismatched page sizes when using --enable-openbsd-malloc.
2676 - Avoid double-marked-for-close warning when certain kinds of invalid
2677 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
2678 for bug 617. Bugfix on 0.2.0.1-alpha.
2679 - Make sure that the "NULL-means-reject *:*" convention is followed by
2680 all the policy manipulation functions, avoiding some possible crash
2681 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
2682 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
2683 actually works, and doesn't warn about every single reverse lookup.
2684 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
2687 - Only log guard node status when guard node status has changed.
2688 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
2689 make "INFO" 75% less verbose.
2692 Changes in version 0.2.0.21-rc - 2008-03-02
2693 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
2694 makes Tor work well with Vidalia again, fixes a rare assert bug,
2695 and fixes a pair of more minor bugs. The bundles also include Vidalia
2696 0.1.0 and Torbutton 1.1.16.
2699 - The control port should declare that it requires password auth
2700 when HashedControlSessionPassword is set too. Patch from Matt Edman;
2701 bugfix on 0.2.0.20-rc. Fixes bug 615.
2702 - Downgrade assert in connection_buckets_decrement() to a log message.
2703 This may help us solve bug 614, and in any case will make its
2704 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
2705 - We were sometimes miscounting the number of bytes read from the
2706 network, causing our rate limiting to not be followed exactly.
2707 Bugfix on 0.2.0.16-alpha. Reported by lodger.
2710 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
2711 OpenSSL versions should have been working fine. Diagnosis and patch
2712 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
2713 Bugfix on 0.2.0.20-rc.
2716 Changes in version 0.2.0.20-rc - 2008-02-24
2717 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
2718 makes more progress towards normalizing Tor's TLS handshake, makes
2719 hidden services work better again, helps relays bootstrap if they don't
2720 know their IP address, adds optional support for linking in openbsd's
2721 allocator or tcmalloc, allows really fast relays to scale past 15000
2722 sockets, and fixes a bunch of minor bugs reported by Veracode.
2725 - Enable the revised TLS handshake based on the one designed by
2726 Steven Murdoch in proposal 124, as revised in proposal 130. It
2727 includes version negotiation for OR connections as described in
2728 proposal 105. The new handshake is meant to be harder for censors
2729 to fingerprint, and it adds the ability to detect certain kinds of
2730 man-in-the-middle traffic analysis attacks. The version negotiation
2731 feature will allow us to improve Tor's link protocol more safely
2733 - Choose which bridge to use proportional to its advertised bandwidth,
2734 rather than uniformly at random. This should speed up Tor for
2735 bridge users. Also do this for people who set StrictEntryNodes.
2736 - When a TrackHostExits-chosen exit fails too many times in a row,
2737 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
2740 - Resolved problems with (re-)fetching hidden service descriptors.
2741 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
2743 - If we only ever used Tor for hidden service lookups or posts, we
2744 would stop building circuits and start refusing connections after
2745 24 hours, since we falsely believed that Tor was dormant. Reported
2746 by nwf; bugfix on 0.1.2.x.
2747 - Servers that don't know their own IP address should go to the
2748 authorities for their first directory fetch, even if their DirPort
2749 is off or if they don't know they're reachable yet. This will help
2750 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
2751 - When counting the number of open sockets, count not only the number
2752 of sockets we have received from the socket() call, but also
2753 the number we've gotten from accept() and socketpair(). This bug
2754 made us fail to count all sockets that we were using for incoming
2755 connections. Bugfix on 0.2.0.x.
2756 - Fix code used to find strings within buffers, when those strings
2757 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
2758 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
2759 - Add a new __HashedControlSessionPassword option for controllers
2760 to use for one-off session password hashes that shouldn't get
2761 saved to disk by SAVECONF --- Vidalia users were accumulating a
2762 pile of HashedControlPassword lines in their torrc files, one for
2763 each time they had restarted Tor and then clicked Save. Make Tor
2764 automatically convert "HashedControlPassword" to this new option but
2765 only when it's given on the command line. Partial fix for bug 586.
2767 o Minor features (performance):
2768 - Tune parameters for cell pool allocation to minimize amount of
2770 - Add OpenBSD malloc code from phk as an optional malloc
2771 replacement on Linux: some glibc libraries do very poorly
2772 with Tor's memory allocation patterns. Pass
2773 --enable-openbsd-malloc to get the replacement malloc code.
2774 - Add a --with-tcmalloc option to the configure script to link
2775 against tcmalloc (if present). Does not yet search for
2776 non-system include paths.
2777 - Stop imposing an arbitrary maximum on the number of file descriptors
2778 used for busy servers. Bug reported by Olaf Selke; patch from
2781 o Minor features (other):
2782 - When SafeLogging is disabled, log addresses along with all TLS
2784 - When building with --enable-gcc-warnings, check for whether Apple's
2785 warning "-Wshorten-64-to-32" is available.
2786 - Add a --passphrase-fd argument to the tor-gencert command for
2789 o Minor bugfixes (memory leaks and code problems):
2790 - We were leaking a file descriptor if Tor started with a zero-length
2791 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
2792 - Detect size overflow in zlib code. Reported by Justin Ferguson and
2794 - We were comparing the raw BridgePassword entry with a base64'ed
2795 version of it, when handling a "/tor/networkstatus-bridges"
2796 directory request. Now compare correctly. Noticed by Veracode.
2797 - Recover from bad tracked-since value in MTBF-history file.
2799 - Alter the code that tries to recover from unhandled write
2800 errors, to not try to flush onto a socket that's given us
2801 unhandled errors. Bugfix on 0.1.2.x.
2802 - Make Unix controlsockets work correctly on OpenBSD. Patch from
2803 tup. Bugfix on 0.2.0.3-alpha.
2805 o Minor bugfixes (other):
2806 - If we have an extra-info document for our server, always make
2807 it available on the control port, even if we haven't gotten
2808 a copy of it from an authority yet. Patch from mwenge.
2809 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
2810 - Directory mirrors no longer include a guess at the client's IP
2811 address if the connection appears to be coming from the same /24
2812 network; it was producing too many wrong guesses.
2813 - Make the new hidden service code respect the SafeLogging setting.
2814 Bugfix on 0.2.0.x. Patch from Karsten.
2815 - When starting as an authority, do not overwrite all certificates
2816 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
2817 - If we're trying to flush the last bytes on a connection (for
2818 example, when answering a directory request), reset the
2819 time-to-give-up timeout every time we manage to write something
2820 on the socket. Bugfix on 0.1.2.x.
2821 - Change the behavior of "getinfo status/good-server-descriptor"
2822 so it doesn't return failure when any authority disappears.
2823 - Even though the man page said that "TrackHostExits ." should
2824 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
2825 - Report TLS "zero return" case as a "clean close" and "IO error"
2826 as a "close". Stop calling closes "unexpected closes": existing
2827 Tors don't use SSL_close(), so having a connection close without
2828 the TLS shutdown handshake is hardly unexpected.
2829 - Send NAMESERVER_STATUS messages for a single failed nameserver
2832 o Code simplifications and refactoring:
2833 - Remove the tor_strpartition function: its logic was confused,
2834 and it was only used for one thing that could be implemented far
2838 Changes in version 0.2.0.19-alpha - 2008-02-09
2839 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
2840 handshake, makes path selection for relays more secure and IP address
2841 guessing more robust, and generally fixes a lot of bugs in preparation
2842 for calling the 0.2.0 branch stable.
2845 - Do not include recognizeable strings in the commonname part of
2846 Tor's x509 certificates.
2849 - If we're a relay, avoid picking ourselves as an introduction point,
2850 a rendezvous point, or as the final hop for internal circuits. Bug
2851 reported by taranis and lodger. Bugfix on 0.1.2.x.
2852 - Patch from "Andrew S. Lists" to catch when we contact a directory
2853 mirror at IP address X and he says we look like we're coming from
2854 IP address X. Bugfix on 0.1.2.x.
2856 o Minor features (security):
2857 - Be more paranoid about overwriting sensitive memory on free(),
2858 as a defensive programming tactic to ensure forward secrecy.
2860 o Minor features (directory authority):
2861 - Actually validate the options passed to AuthDirReject,
2862 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
2863 - Reject router descriptors with out-of-range bandwidthcapacity or
2864 bandwidthburst values.
2866 o Minor features (controller):
2867 - Reject controller commands over 1MB in length. This keeps rogue
2868 processes from running us out of memory.
2870 o Minor features (misc):
2871 - Give more descriptive well-formedness errors for out-of-range
2872 hidden service descriptor/protocol versions.
2873 - Make memory debugging information describe more about history
2874 of cell allocation, so we can help reduce our memory use.
2876 o Deprecated features (controller):
2877 - The status/version/num-versioning and status/version/num-concurring
2878 GETINFO options are no longer useful in the v3 directory protocol:
2879 treat them as deprecated, and warn when they're used.
2882 - When our consensus networkstatus has been expired for a while, stop
2883 being willing to build circuits using it. Fixes bug 401. Bugfix
2885 - Directory caches now fetch certificates from all authorities
2886 listed in a networkstatus consensus, even when they do not
2887 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
2888 - When connecting to a bridge without specifying its key, insert
2889 the connection into the identity-to-connection map as soon as
2890 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
2891 - Detect versions of OS X where malloc_good_size() is present in the
2892 library but never actually declared. Resolves bug 587. Bugfix
2894 - Stop incorrectly truncating zlib responses to directory authority
2895 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
2896 - Stop recommending that every server operator send mail to tor-ops.
2897 Resolves bug 597. Bugfix on 0.1.2.x.
2898 - Don't trigger an assert if we start a directory authority with a
2899 private IP address (like 127.0.0.1).
2900 - Avoid possible failures when generating a directory with routers
2901 with over-long versions strings, or too many flags set. Bugfix
2903 - If an attempt to launch a DNS resolve request over the control
2904 port fails because we have overrun the limit on the number of
2905 connections, tell the controller that the request has failed.
2906 - Avoid using too little bandwidth when our clock skips a few
2907 seconds. Bugfix on 0.1.2.x.
2908 - Fix shell error when warning about missing packages in configure
2909 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
2910 - Do not become confused when receiving a spurious VERSIONS-like
2911 cell from a confused v1 client. Bugfix on 0.2.0.x.
2912 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
2913 introduction points for a hidden service have failed. Patch from
2914 Karsten Loesing. Bugfix on 0.2.0.x.
2916 o Code simplifications and refactoring:
2917 - Remove some needless generality from cpuworker code, for improved
2919 - Stop overloading the circuit_t.onionskin field for both "onionskin
2920 from a CREATE cell that we are waiting for a cpuworker to be
2921 assigned" and "onionskin from an EXTEND cell that we are going to
2922 send to an OR as soon as we are connected". Might help with bug 600.
2923 - Add an in-place version of aes_crypt() so that we can avoid doing a
2924 needless memcpy() call on each cell payload.
2927 Changes in version 0.2.0.18-alpha - 2008-01-25
2928 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
2929 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
2930 that can warn or reject connections to ports generally associated with
2931 vulnerable-plaintext protocols.
2933 o New directory authorities:
2934 - Set up dannenberg (run by CCC) as the sixth v3 directory
2938 - Fix a major memory leak when attempting to use the v2 TLS
2939 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
2940 - We accidentally enabled the under-development v2 TLS handshake
2941 code, which was causing log entries like "TLS error while
2942 renegotiating handshake". Disable it again. Resolves bug 590.
2943 - We were computing the wrong Content-Length: header for directory
2944 responses that need to be compressed on the fly, causing clients
2945 asking for those items to always fail. Bugfix on 0.2.0.x; partially
2949 - Avoid going directly to the directory authorities even if you're a
2950 relay, if you haven't found yourself reachable yet or if you've
2951 decided not to advertise your dirport yet. Addresses bug 556.
2952 - If we've gone 12 hours since our last bandwidth check, and we
2953 estimate we have less than 50KB bandwidth capacity but we could
2954 handle more, do another bandwidth test.
2955 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
2956 Tor can warn and/or refuse connections to ports commonly used with
2957 vulnerable-plaintext protocols. Currently we warn on ports 23,
2958 109, 110, and 143, but we don't reject any.
2961 - When we setconf ClientOnly to 1, close any current OR and Dir
2962 listeners. Reported by mwenge.
2963 - When we get a consensus that's been signed by more people than
2964 we expect, don't log about it; it's not a big deal. Reported
2968 - Don't answer "/tor/networkstatus-bridges" directory requests if
2969 the request isn't encrypted.
2970 - Make "ClientOnly 1" config option disable directory ports too.
2971 - Patches from Karsten Loesing to make v2 hidden services more
2972 robust: work even when there aren't enough HSDir relays available;
2973 retry when a v2 rend desc fetch fails; but don't retry if we
2974 already have a usable v0 rend desc.
2977 Changes in version 0.2.0.17-alpha - 2008-01-17
2978 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
2981 - Make the tor-gencert man page get included correctly in the tarball.
2984 Changes in version 0.2.0.16-alpha - 2008-01-17
2985 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
2986 Loesing, and generally cleans up a lot of features and minor bugs.
2988 o New directory authorities:
2989 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
2992 o Major performance improvements:
2993 - Switch our old ring buffer implementation for one more like that
2994 used by free Unix kernels. The wasted space in a buffer with 1mb
2995 of data will now be more like 8k than 1mb. The new implementation
2996 also avoids realloc();realloc(); patterns that can contribute to
2997 memory fragmentation.
3000 - Configuration files now accept C-style strings as values. This
3001 helps encode characters not allowed in the current configuration
3002 file format, such as newline or #. Addresses bug 557.
3003 - Although we fixed bug 539 (where servers would send HTTP status 503
3004 responses _and_ send a body too), there are still servers out
3005 there that haven't upgraded. Therefore, make clients parse such
3006 bodies when they receive them.
3007 - When we're not serving v2 directory information, there is no reason
3008 to actually keep any around. Remove the obsolete files and directory
3009 on startup if they are very old and we aren't going to serve them.
3011 o Minor performance improvements:
3012 - Reference-count and share copies of address policy entries; only 5%
3013 of them were actually distinct.
3014 - Never walk through the list of logs if we know that no log is
3015 interested in a given message.
3018 - When an authority has not signed a consensus, do not try to
3019 download a nonexistent "certificate with key 00000000". Bugfix
3020 on 0.2.0.x. Fixes bug 569.
3021 - Fix a rare assert error when we're closing one of our threads:
3022 use a mutex to protect the list of logs, so we never write to the
3023 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
3024 bug 575, which is kind of the revenge of bug 222.
3025 - Patch from Karsten Loesing to complain less at both the client
3026 and the relay when a relay used to have the HSDir flag but doesn't
3027 anymore, and we try to upload a hidden service descriptor.
3028 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
3030 - Do not try to download missing certificates until we have tried
3031 to check our fallback consensus. Fixes bug 583.
3032 - Make bridges round reported GeoIP stats info up to the nearest
3033 estimate, not down. Now we can distinguish between "0 people from
3034 this country" and "1 person from this country".
3035 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
3036 - Avoid possible segfault if key generation fails in
3037 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
3038 - Avoid segfault in the case where a badly behaved v2 versioning
3039 directory sends a signed networkstatus with missing client-versions.
3041 - Avoid segfaults on certain complex invocations of
3042 router_get_by_hexdigest(). Bugfix on 0.1.2.
3043 - Correct bad index on array access in parse_http_time(). Bugfix
3045 - Fix possible bug in vote generation when server versions are present
3046 but client versions are not.
3047 - Fix rare bug on REDIRECTSTREAM control command when called with no
3048 port set: it could erroneously report an error when none had
3050 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
3051 compressing large objects and find ourselves with more than 4k
3052 left over. Bugfix on 0.2.0.
3053 - Fix a small memory leak when setting up a hidden service.
3054 - Fix a few memory leaks that could in theory happen under bizarre
3056 - Fix an assert if we post a general-purpose descriptor via the
3057 control port but that descriptor isn't mentioned in our current
3058 network consensus. Bug reported by Jon McLachlan; bugfix on
3061 o Minor features (controller):
3062 - Get NS events working again. Patch from tup.
3063 - The GETCONF command now escapes and quotes configuration values
3064 that don't otherwise fit into the torrc file.
3065 - The SETCONF command now handles quoted values correctly.
3067 o Minor features (directory authorities):
3068 - New configuration options to override default maximum number of
3069 servers allowed on a single IP address. This is important for
3070 running a test network on a single host.
3071 - Actually implement the -s option to tor-gencert.
3072 - Add a manual page for tor-gencert.
3074 o Minor features (bridges):
3075 - Bridge authorities no longer serve bridge descriptors over
3076 unencrypted connections.
3078 o Minor features (other):
3079 - Add hidden services and DNSPorts to the list of things that make
3080 Tor accept that it has running ports. Change starting Tor with no
3081 ports from a fatal error to a warning; we might change it back if
3082 this turns out to confuse anybody. Fixes bug 579.
3085 Changes in version 0.1.2.19 - 2008-01-17
3086 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
3087 exit policy a little bit more conservative so it's safer to run an
3088 exit relay on a home system, and fixes a variety of smaller issues.
3091 - Exit policies now reject connections that are addressed to a
3092 relay's public (external) IP address too, unless
3093 ExitPolicyRejectPrivate is turned off. We do this because too
3094 many relays are running nearby to services that trust them based
3098 - When the clock jumps forward a lot, do not allow the bandwidth
3099 buckets to become negative. Fixes bug 544.
3100 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
3101 on every successful resolve. Reported by Mike Perry.
3102 - Purge old entries from the "rephist" database and the hidden
3103 service descriptor database even when DirPort is zero.
3104 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
3105 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
3106 crashing or mis-answering these requests.
3107 - When we decide to send a 503 response to a request for servers, do
3108 not then also send the server descriptors: this defeats the whole
3109 purpose. Fixes bug 539.
3112 - Changing the ExitPolicyRejectPrivate setting should cause us to
3113 rebuild our server descriptor.
3114 - Fix handling of hex nicknames when answering controller requests for
3115 networkstatus by name, or when deciding whether to warn about
3116 unknown routers in a config option. (Patch from mwenge.)
3117 - Fix a couple of hard-to-trigger autoconf problems that could result
3118 in really weird results on platforms whose sys/types.h files define
3119 nonstandard integer types.
3120 - Don't try to create the datadir when running --verify-config or
3121 --hash-password. Resolves bug 540.
3122 - If we were having problems getting a particular descriptor from the
3123 directory caches, and then we learned about a new descriptor for
3124 that router, we weren't resetting our failure count. Reported
3126 - Although we fixed bug 539 (where servers would send HTTP status 503
3127 responses _and_ send a body too), there are still servers out there
3128 that haven't upgraded. Therefore, make clients parse such bodies
3129 when they receive them.
3130 - Run correctly on systems where rlim_t is larger than unsigned long.
3131 This includes some 64-bit systems.
3132 - Run correctly on platforms (like some versions of OS X 10.5) where
3133 the real limit for number of open files is OPEN_FILES, not rlim_max
3134 from getrlimit(RLIMIT_NOFILES).
3135 - Avoid a spurious free on base64 failure.
3136 - Avoid segfaults on certain complex invocations of
3137 router_get_by_hexdigest().
3138 - Fix rare bug on REDIRECTSTREAM control command when called with no
3139 port set: it could erroneously report an error when none had
3143 Changes in version 0.2.0.15-alpha - 2007-12-25
3144 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
3145 features added in 0.2.0.13-alpha.
3148 - Fix several remotely triggerable asserts based on DirPort requests
3149 for a v2 or v3 networkstatus object before we were prepared. This
3150 was particularly bad for 0.2.0.13 and later bridge relays, who
3151 would never have a v2 networkstatus and would thus always crash
3152 when used. Bugfixes on 0.2.0.x.
3153 - Estimate the v3 networkstatus size more accurately, rather than
3154 estimating it at zero bytes and giving it artificially high priority
3155 compared to other directory requests. Bugfix on 0.2.0.x.
3158 - Fix configure.in logic for cross-compilation.
3159 - When we load a bridge descriptor from the cache, and it was
3160 previously unreachable, mark it as retriable so we won't just
3161 ignore it. Also, try fetching a new copy immediately. Bugfixes
3163 - The bridge GeoIP stats were counting other relays, for example
3164 self-reachability and authority-reachability tests.
3167 - Support compilation to target iPhone; patch from cjacker huang.
3168 To build for iPhone, pass the --enable-iphone option to configure.
3171 Changes in version 0.2.0.14-alpha - 2007-12-23
3173 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
3174 without a datadirectory from a previous Tor install. Reported
3176 - Fix a crash when we fetch a descriptor that turns out to be
3177 unexpected (it used to be in our networkstatus when we started
3178 fetching it, but it isn't in our current networkstatus), and we
3179 aren't using bridges. Bugfix on 0.2.0.x.
3180 - Fix a crash when accessing hidden services: it would work the first
3181 time you use a given introduction point for your service, but
3182 on subsequent requests we'd be using garbage memory. Fixed by
3183 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
3184 - Fix a crash when we load a bridge descriptor from disk but we don't
3185 currently have a Bridge line for it in our torrc. Bugfix on
3189 - If bridge authorities set BridgePassword, they will serve a
3190 snapshot of known bridge routerstatuses from their DirPort to
3191 anybody who knows that password. Unset by default.
3194 - Make the unit tests build again.
3195 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
3196 - Make PublishServerDescriptor default to 1, so the default doesn't
3197 have to change as we invent new directory protocol versions.
3198 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
3199 be included unless sys/time.h is already included. Fixes
3200 bug 553. Bugfix on 0.2.0.x.
3201 - If we receive a general-purpose descriptor and then receive an
3202 identical bridge-purpose descriptor soon after, don't discard
3203 the next one as a duplicate.
3206 - If BridgeRelay is set to 1, then the default for
3207 PublishServerDescriptor is now "bridge" rather than "v2,v3".
3208 - If the user sets RelayBandwidthRate but doesn't set
3209 RelayBandwidthBurst, then make them equal rather than erroring out.
3212 Changes in version 0.2.0.13-alpha - 2007-12-21
3213 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
3214 Goodell, fixes many more bugs, and adds a lot of infrastructure for
3217 o New directory authorities:
3218 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
3222 - Only update guard status (usable / not usable) once we have
3223 enough directory information. This was causing us to always pick
3224 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
3225 causing us to discard all our guards on startup if we hadn't been
3226 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
3227 - Purge old entries from the "rephist" database and the hidden
3228 service descriptor databases even when DirPort is zero. Bugfix
3230 - We were ignoring our RelayBandwidthRate for the first 30 seconds
3231 after opening a circuit -- even a relayed circuit. Bugfix on
3233 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
3234 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
3235 crashing or mis-answering these types of requests.
3236 - Relays were publishing their server descriptor to v1 and v2
3237 directory authorities, but they didn't try publishing to v3-only
3238 authorities. Fix this; and also stop publishing to v1 authorities.
3240 - When we were reading router descriptors from cache, we were ignoring
3241 the annotations -- so for example we were reading in bridge-purpose
3242 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
3243 - When we decided to send a 503 response to a request for servers, we
3244 were then also sending the server descriptors: this defeats the
3245 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
3248 - Bridge relays now behave like clients with respect to time
3249 intervals for downloading new consensus documents -- otherwise they
3250 stand out. Bridge users now wait until the end of the interval,
3251 so their bridge relay will be sure to have a new consensus document.
3252 - Three new config options (AlternateDirAuthority,
3253 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
3254 user selectively replace the default directory authorities by type,
3255 rather than the all-or-nothing replacement that DirServer offers.
3256 - Tor can now be configured to read a GeoIP file from disk in one
3257 of two formats. This can be used by controllers to map IP addresses
3258 to countries. Eventually, it may support exit-by-country.
3259 - When possible, bridge relays remember which countries users
3260 are coming from, and report aggregate information in their
3261 extra-info documents, so that the bridge authorities can learn
3262 where Tor is blocked.
3263 - Bridge directory authorities now do reachability testing on the
3264 bridges they know. They provide router status summaries to the
3265 controller via "getinfo ns/purpose/bridge", and also dump summaries
3266 to a file periodically.
3267 - Stop fetching directory info so aggressively if your DirPort is
3268 on but your ORPort is off; stop fetching v2 dir info entirely.
3269 You can override these choices with the new FetchDirInfoEarly
3273 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
3274 consensus documents when there are too many relays at a single
3275 IP address. Now clear it in v2 network status documents too, and
3276 also clear it in routerinfo_t when the relay is no longer listed
3277 in the relevant networkstatus document.
3278 - Don't crash if we get an unexpected value for the
3279 PublishServerDescriptor config option. Reported by Matt Edman;
3280 bugfix on 0.2.0.9-alpha.
3281 - Our new v2 hidden service descriptor format allows descriptors
3282 that have no introduction points. But Tor crashed when we tried
3283 to build a descriptor with no intro points (and it would have
3284 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
3286 - Fix building with dmalloc 5.5.2 with glibc.
3287 - Reject uploaded descriptors and extrainfo documents if they're
3288 huge. Otherwise we'll cache them all over the network and it'll
3289 clog everything up. Reported by Aljosha Judmayer.
3290 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
3291 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
3292 - When the DANGEROUS_VERSION controller status event told us we're
3293 running an obsolete version, it used the string "OLD" to describe
3294 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
3295 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
3296 - If we can't expand our list of entry guards (e.g. because we're
3297 using bridges or we have StrictEntryNodes set), don't mark relays
3298 down when they fail a directory request. Otherwise we're too quick
3299 to mark all our entry points down. Bugfix on 0.1.2.x.
3300 - Fix handling of hex nicknames when answering controller requests for
3301 networkstatus by name, or when deciding whether to warn about unknown
3302 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
3303 - Fix a couple of hard-to-trigger autoconf problems that could result
3304 in really weird results on platforms whose sys/types.h files define
3305 nonstandard integer types. Bugfix on 0.1.2.x.
3306 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
3307 - Don't crash on name lookup when we have no current consensus. Fixes
3308 bug 538; bugfix on 0.2.0.x.
3309 - Only Tors that want to mirror the v2 directory info should
3310 create the "cached-status" directory in their datadir. (All Tors
3311 used to create it.) Bugfix on 0.2.0.9-alpha.
3312 - Directory authorities should only automatically download Extra Info
3313 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
3316 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
3317 consumers. (We already do this on HUP.)
3318 - Authorities and caches fetch the v2 networkstatus documents
3319 less often, now that v3 is encouraged.
3320 - Add a new config option BridgeRelay that specifies you want to
3321 be a bridge relay. Right now the only difference is that it makes
3322 you answer begin_dir requests, and it makes you cache dir info,
3323 even if your DirPort isn't on.
3324 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
3325 ask about source, timestamp of arrival, purpose, etc. We need
3326 something like this to help Vidalia not do GeoIP lookups on bridge
3328 - Allow multiple HashedControlPassword config lines, to support
3329 multiple controller passwords.
3330 - Authorities now decide whether they're authoritative for a given
3331 router based on the router's purpose.
3332 - New config options AuthDirBadDir and AuthDirListBadDirs for
3333 authorities to mark certain relays as "bad directories" in the
3334 networkstatus documents. Also supports the "!baddir" directive in
3335 the approved-routers file.
3338 Changes in version 0.2.0.12-alpha - 2007-11-16
3339 This twelfth development snapshot fixes some more build problems as
3340 well as a few minor bugs.
3343 - Make it build on OpenBSD again. Patch from tup.
3344 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
3345 package-building for Red Hat, OS X, etc.
3347 o Minor bugfixes (on 0.1.2.x):
3348 - Changing the ExitPolicyRejectPrivate setting should cause us to
3349 rebuild our server descriptor.
3351 o Minor bugfixes (on 0.2.0.x):
3352 - When we're lacking a consensus, don't try to perform rendezvous
3353 operations. Reported by Karsten Loesing.
3354 - Fix a small memory leak whenever we decide against using a
3355 newly picked entry guard. Reported by Mike Perry.
3356 - When authorities detected more than two relays running on the same
3357 IP address, they were clearing all the status flags but forgetting
3358 to clear the "hsdir" flag. So clients were being told that a
3359 given relay was the right choice for a v2 hsdir lookup, yet they
3360 never had its descriptor because it was marked as 'not running'
3362 - If we're trying to fetch a bridge descriptor and there's no way
3363 the bridge authority could help us (for example, we don't know
3364 a digest, or there is no bridge authority), don't be so eager to
3365 fall back to asking the bridge authority.
3366 - If we're using bridges or have strictentrynodes set, and our
3367 chosen exit is in the same family as all our bridges/entry guards,
3368 then be flexible about families.
3371 - When we negotiate a v2 link-layer connection (not yet implemented),
3372 accept RELAY_EARLY cells and turn them into RELAY cells if we've
3373 negotiated a v1 connection for their next step. Initial code for
3377 Changes in version 0.2.0.11-alpha - 2007-11-12
3378 This eleventh development snapshot fixes some build problems with
3379 the previous snapshot. It also includes a more secure-by-default exit
3380 policy for relays, fixes an enormous memory leak for exit relays, and
3381 fixes another bug where servers were falling out of the directory list.
3384 - Exit policies now reject connections that are addressed to a
3385 relay's public (external) IP address too, unless
3386 ExitPolicyRejectPrivate is turned off. We do this because too
3387 many relays are running nearby to services that trust them based
3388 on network address. Bugfix on 0.1.2.x.
3391 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
3392 on every successful resolve. Reported by Mike Perry; bugfix
3394 - On authorities, never downgrade to old router descriptors simply
3395 because they're listed in the consensus. This created a catch-22
3396 where we wouldn't list a new descriptor because there was an
3397 old one in the consensus, and we couldn't get the new one in the
3398 consensus because we wouldn't list it. Possible fix for bug 548.
3399 Also, this might cause bug 543 to appear on authorities; if so,
3400 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
3402 o Packaging fixes on 0.2.0.10-alpha:
3403 - We were including instructions about what to do with the
3404 src/config/fallback-consensus file, but we weren't actually
3405 including it in the tarball. Disable all of that for now.
3408 - Allow people to say PreferTunnelledDirConns rather than
3409 PreferTunneledDirConns, for those alternate-spellers out there.
3412 - Don't reevaluate all the information from our consensus document
3413 just because we've downloaded a v2 networkstatus that we intend
3414 to cache. Fixes bug 545; bugfix on 0.2.0.x.
3417 Changes in version 0.2.0.10-alpha - 2007-11-10
3418 This tenth development snapshot adds a third v3 directory authority
3419 run by Mike Perry, adds most of Karsten Loesing's new hidden service
3420 descriptor format, fixes a bad crash bug and new bridge bugs introduced
3421 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
3422 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
3423 addresses many more minor issues.
3425 o New directory authorities:
3426 - Set up ides (run by Mike Perry) as the third v3 directory authority.
3429 - Allow tunnelled directory connections to ask for an encrypted
3430 "begin_dir" connection or an anonymized "uses a full Tor circuit"
3431 connection independently. Now we can make anonymized begin_dir
3432 connections for (e.g.) more secure hidden service posting and
3434 - More progress on proposal 114: code from Karsten Loesing to
3435 implement new hidden service descriptor format.
3436 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
3437 accommodate the growing number of servers that use the default
3438 and are reaching it.
3439 - Directory authorities use a new formula for selecting which nodes
3440 to advertise as Guards: they must be in the top 7/8 in terms of
3441 how long we have known about them, and above the median of those
3442 nodes in terms of weighted fractional uptime.
3443 - Make "not enough dir info yet" warnings describe *why* Tor feels
3444 it doesn't have enough directory info yet.
3447 - Stop servers from crashing if they set a Family option (or
3448 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
3450 - Make bridge users work again -- the move to v3 directories in
3451 0.2.0.9-alpha had introduced a number of bugs that made bridges
3452 no longer work for clients.
3453 - When the clock jumps forward a lot, do not allow the bandwidth
3454 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
3456 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
3457 - When the consensus lists a router descriptor that we previously were
3458 mirroring, but that we considered non-canonical, reload the
3459 descriptor as canonical. This fixes bug 543 where Tor servers
3460 would start complaining after a few days that they don't have
3461 enough directory information to build a circuit.
3462 - Consider replacing the current consensus when certificates arrive
3463 that make the pending consensus valid. Previously, we were only
3464 considering replacement when the new certs _didn't_ help.
3465 - Fix an assert error on startup if we didn't already have the
3466 consensus and certs cached in our datadirectory: we were caching
3467 the consensus in consensus_waiting_for_certs but then free'ing it
3469 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
3470 Request) if we need more v3 certs but we've already got pending
3471 requests for all of them.
3472 - Correctly back off from failing certificate downloads. Fixes
3474 - Authorities don't vote on the Running flag if they have been running
3475 for less than 30 minutes themselves. Fixes bug 547, where a newly
3476 started authority would vote that everyone was down.
3479 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
3480 it, it had no AES, and it hasn't seen any security patches since
3484 - Clients now hold circuitless TLS connections open for 1.5 times
3485 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
3486 rebuild a new circuit over them within that timeframe. Previously,
3487 they held them open only for KeepalivePeriod (5 minutes).
3488 - Use "If-Modified-Since" to avoid retrieving consensus
3489 networkstatuses that we already have.
3490 - When we have no consensus, check FallbackNetworkstatusFile (defaults
3491 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
3492 we start knowing some directory caches.
3493 - When we receive a consensus from the future, warn about skew.
3494 - Improve skew reporting: try to give the user a better log message
3495 about how skewed they are, and how much this matters.
3496 - When we have a certificate for an authority, believe that
3497 certificate's claims about the authority's IP address.
3498 - New --quiet command-line option to suppress the default console log.
3499 Good in combination with --hash-password.
3500 - Authorities send back an X-Descriptor-Not-New header in response to
3501 an accepted-but-discarded descriptor upload. Partially implements
3503 - Make the log message for "tls error. breaking." more useful.
3504 - Better log messages about certificate downloads, to attempt to
3505 track down the second incarnation of bug 546.
3507 o Minor features (bridges):
3508 - If bridge users set UpdateBridgesFromAuthority, but the digest
3509 they ask for is a 404 from the bridge authority, they now fall
3510 back to trying the bridge directly.
3511 - Bridges now use begin_dir to publish their server descriptor to
3512 the bridge authority, even when they haven't set TunnelDirConns.
3514 o Minor features (controller):
3515 - When reporting clock skew, and we know that the clock is _at least
3516 as skewed_ as some value, but we don't know the actual value,
3517 report the value as a "minimum skew."
3520 - Update linux-tor-prio.sh script to allow QoS based on the uid of
3521 the Tor process. Patch from Marco Bonetti with tweaks from Mike
3525 - Refuse to start if both ORPort and UseBridges are set. Bugfix
3526 on 0.2.0.x, suggested by Matt Edman.
3527 - Don't stop fetching descriptors when FetchUselessDescriptors is
3528 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
3529 reported by tup and ioerror.
3530 - Better log message on vote from unknown authority.
3531 - Don't log "Launching 0 request for 0 router" message.
3533 o Minor bugfixes (memory leaks):
3534 - Stop leaking memory every time we parse a v3 certificate. Bugfix
3536 - Stop leaking memory every time we load a v3 certificate. Bugfix
3537 on 0.2.0.1-alpha. Fixes bug 536.
3538 - Stop leaking a cached networkstatus on exit. Bugfix on
3540 - Stop leaking voter information every time we free a consensus.
3541 Bugfix on 0.2.0.3-alpha.
3542 - Stop leaking signed data every time we check a voter signature.
3543 Bugfix on 0.2.0.3-alpha.
3544 - Stop leaking a signature every time we fail to parse a consensus or
3545 a vote. Bugfix on 0.2.0.3-alpha.
3546 - Stop leaking v2_download_status_map on shutdown. Bugfix on
3548 - Stop leaking conn->nickname every time we make a connection to a
3549 Tor relay without knowing its expected identity digest (e.g. when
3550 using bridges). Bugfix on 0.2.0.3-alpha.
3552 - Minor bugfixes (portability):
3553 - Run correctly on platforms where rlim_t is larger than unsigned
3554 long, and/or where the real limit for number of open files is
3555 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
3556 particular, these may be needed for OS X 10.5.
3559 Changes in version 0.1.2.18 - 2007-10-28
3560 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
3561 hidden service introduction that were causing huge delays, and a big
3562 bug that was causing some servers to disappear from the network status
3563 lists for a few hours each day.
3565 o Major bugfixes (crashes):
3566 - If a connection is shut down abruptly because of something that
3567 happened inside connection_flushed_some(), do not call
3568 connection_finished_flushing(). Should fix bug 451:
3569 "connection_stop_writing: Assertion conn->write_event failed"
3570 Bugfix on 0.1.2.7-alpha.
3571 - Fix possible segfaults in functions called from
3572 rend_process_relay_cell().
3574 o Major bugfixes (hidden services):
3575 - Hidden services were choosing introduction points uniquely by
3576 hexdigest, but when constructing the hidden service descriptor
3577 they merely wrote the (potentially ambiguous) nickname.
3578 - Clients now use the v2 intro format for hidden service
3579 connections: they specify their chosen rendezvous point by identity
3580 digest rather than by (potentially ambiguous) nickname. These
3581 changes could speed up hidden service connections dramatically.
3583 o Major bugfixes (other):
3584 - Stop publishing a new server descriptor just because we get a
3585 HUP signal. This led (in a roundabout way) to some servers getting
3586 dropped from the networkstatus lists for a few hours each day.
3587 - When looking for a circuit to cannibalize, consider family as well
3588 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
3589 circuit cannibalization).
3590 - When a router wasn't listed in a new networkstatus, we were leaving
3591 the flags for that router alone -- meaning it remained Named,
3592 Running, etc -- even though absence from the networkstatus means
3593 that it shouldn't be considered to exist at all anymore. Now we
3594 clear all the flags for routers that fall out of the networkstatus
3595 consensus. Fixes bug 529.
3598 - Don't try to access (or alter) the state file when running
3599 --list-fingerprint or --verify-config or --hash-password. Resolves
3601 - When generating information telling us how to extend to a given
3602 router, do not try to include the nickname if it is
3603 absent. Resolves bug 467.
3604 - Fix a user-triggerable segfault in expand_filename(). (There isn't
3605 a way to trigger this remotely.)
3606 - When sending a status event to the controller telling it that an
3607 OR address is reachable, set the port correctly. (Previously we
3608 were reporting the dir port.)
3609 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
3610 command. Bugfix on 0.1.2.17.
3611 - When loading bandwidth history, do not believe any information in
3612 the future. Fixes bug 434.
3613 - When loading entry guard information, do not believe any information
3615 - When we have our clock set far in the future and generate an
3616 onion key, then re-set our clock to be correct, we should not stop
3617 the onion key from getting rotated.
3618 - On some platforms, accept() can return a broken address. Detect
3619 this more quietly, and deal accordingly. Fixes bug 483.
3620 - It's not actually an error to find a non-pending entry in the DNS
3621 cache when canceling a pending resolve. Don't log unless stuff
3622 is fishy. Resolves bug 463.
3623 - Don't reset trusted dir server list when we set a configuration
3624 option. Patch from Robert Hogan.
3625 - Don't try to create the datadir when running --verify-config or
3626 --hash-password. Resolves bug 540.
3629 Changes in version 0.2.0.9-alpha - 2007-10-24
3630 This ninth development snapshot switches clients to the new v3 directory
3631 system; allows servers to be listed in the network status even when they
3632 have the same nickname as a registered server; and fixes many other
3633 bugs including a big one that was causing some servers to disappear
3634 from the network status lists for a few hours each day.
3636 o Major features (directory system):
3637 - Clients now download v3 consensus networkstatus documents instead
3638 of v2 networkstatus documents. Clients and caches now base their
3639 opinions about routers on these consensus documents. Clients only
3640 download router descriptors listed in the consensus.
3641 - Authorities now list servers who have the same nickname as
3642 a different named server, but list them with a new flag,
3643 "Unnamed". Now we can list servers that happen to pick the same
3644 nickname as a server that registered two years ago and then
3645 disappeared. Partially implements proposal 122.
3646 - If the consensus lists a router as "Unnamed", the name is assigned
3647 to a different router: do not identify the router by that name.
3648 Partially implements proposal 122.
3649 - Authorities can now come to a consensus on which method to use to
3650 compute the consensus. This gives us forward compatibility.
3653 - Stop publishing a new server descriptor just because we HUP or
3654 when we find our DirPort to be reachable but won't actually publish
3655 it. New descriptors without any real changes are dropped by the
3656 authorities, and can screw up our "publish every 18 hours" schedule.
3658 - When a router wasn't listed in a new networkstatus, we were leaving
3659 the flags for that router alone -- meaning it remained Named,
3660 Running, etc -- even though absence from the networkstatus means
3661 that it shouldn't be considered to exist at all anymore. Now we
3662 clear all the flags for routers that fall out of the networkstatus
3663 consensus. Fixes bug 529; bugfix on 0.1.2.x.
3664 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
3665 extrainfo documents and then discard them immediately for not
3666 matching the latest router. Bugfix on 0.2.0.1-alpha.
3668 o Minor features (v3 directory protocol):
3669 - Allow tor-gencert to generate a new certificate without replacing
3671 - Allow certificates to include an address.
3672 - When we change our directory-cache settings, reschedule all voting
3673 and download operations.
3674 - Reattempt certificate downloads immediately on failure, as long as
3675 we haven't failed a threshold number of times yet.
3676 - Delay retrying consensus downloads while we're downloading
3677 certificates to verify the one we just got. Also, count getting a
3678 consensus that we already have (or one that isn't valid) as a failure,
3679 and count failing to get the certificates after 20 minutes as a
3681 - Build circuits and download descriptors even if our consensus is a
3682 little expired. (This feature will go away once authorities are
3685 o Minor features (router descriptor cache):
3686 - If we find a cached-routers file that's been sitting around for more
3687 than 28 days unmodified, then most likely it's a leftover from
3688 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
3690 - When we (as a cache) download a descriptor because it was listed
3691 in a consensus, remember when the consensus was supposed to expire,
3692 and don't expire the descriptor until then.
3694 o Minor features (performance):
3695 - Call routerlist_remove_old_routers() much less often. This should
3696 speed startup, especially on directory caches.
3697 - Don't try to launch new descriptor downloads quite so often when we
3698 already have enough directory information to build circuits.
3699 - Base64 decoding was actually showing up on our profile when parsing
3700 the initial descriptor file; switch to an in-process all-at-once
3701 implementation that's about 3.5x times faster than calling out to
3704 o Minor features (compilation):
3705 - Detect non-ASCII platforms (if any still exist) and refuse to
3706 build there: some of our code assumes that 'A' is 65 and so on.
3708 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
3709 - Make the "next period" votes into "current period" votes immediately
3710 after publishing the consensus; avoid a heisenbug that made them
3711 stick around indefinitely.
3712 - When we discard a vote as a duplicate, do not report this as
3714 - Treat missing v3 keys or certificates as an error when running as a
3715 v3 directory authority.
3716 - When we're configured to be a v3 authority, but we're only listed
3717 as a non-v3 authority in our DirServer line for ourself, correct
3719 - If an authority doesn't have a qualified hostname, just put
3720 its address in the vote. This fixes the problem where we referred to
3721 "moria on moria:9031."
3722 - Distinguish between detached signatures for the wrong period, and
3723 detached signatures for a divergent vote.
3724 - Fix a small memory leak when computing a consensus.
3725 - When there's no concensus, we were forming a vote every 30
3726 minutes, but writing the "valid-after" line in our vote based
3727 on our configured V3AuthVotingInterval: so unless the intervals
3728 matched up, we immediately rejected our own vote because it didn't
3729 start at the voting interval that caused us to construct a vote.
3731 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
3732 - Delete unverified-consensus when the real consensus is set.
3733 - Consider retrying a consensus networkstatus fetch immediately
3734 after one fails: don't wait 60 seconds to notice.
3735 - When fetching a consensus as a cache, wait until a newer consensus
3736 should exist before trying to replace the current one.
3737 - Use a more forgiving schedule for retrying failed consensus
3738 downloads than for other types.
3740 o Minor bugfixes (other directory issues):
3741 - Correct the implementation of "download votes by digest." Bugfix on
3743 - Authorities no longer send back "400 you're unreachable please fix
3744 it" errors to Tor servers that aren't online all the time. We're
3745 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
3747 o Minor bugfixes (controller):
3748 - Don't reset trusted dir server list when we set a configuration
3749 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
3750 - Respond to INT and TERM SIGNAL commands before we execute the
3751 signal, in case the signal shuts us down. We had a patch in
3752 0.1.2.1-alpha that tried to do this by queueing the response on
3753 the connection's buffer before shutting down, but that really
3754 isn't the same thing at all. Bug located by Matt Edman.
3756 o Minor bugfixes (misc):
3757 - Correctly check for bad options to the "PublishServerDescriptor"
3758 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
3759 - Stop leaking memory on failing case of base32_decode, and make
3760 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
3761 - Don't try to download extrainfo documents when we're trying to
3762 fetch enough directory info to build a circuit: having enough
3763 info should get priority. Bugfix on 0.2.0.x.
3764 - Don't complain that "your server has not managed to confirm that its
3765 ports are reachable" if we haven't been able to build any circuits
3766 yet. Bug found by spending four hours without a v3 consensus. Bugfix
3768 - Detect the reason for failing to mmap a descriptor file we just
3769 wrote, and give a more useful log message. Fixes bug 533. Bugfix
3772 o Code simplifications and refactoring:
3773 - Remove support for the old bw_accounting file: we've been storing
3774 bandwidth accounting information in the state file since
3775 0.1.2.5-alpha. This may result in bandwidth accounting errors
3776 if you try to upgrade from 0.1.1.x or earlier, or if you try to
3777 downgrade to 0.1.1.x or earlier.
3778 - New convenience code to locate a file within the DataDirectory.
3779 - Move non-authority functionality out of dirvote.c.
3780 - Refactor the arguments for router_pick_{directory_|trusteddir}server
3781 so that they all take the same named flags.
3784 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
3785 Unix users an easy way to script their Tor process (e.g. by
3786 adjusting bandwidth based on the time of the day).
3789 Changes in version 0.2.0.8-alpha - 2007-10-12
3790 This eighth development snapshot fixes a crash bug that's been bothering
3791 us since February 2007, lets bridge authorities store a list of bridge
3792 descriptors they've seen, gets v3 directory voting closer to working,
3793 starts caching v3 directory consensus documents on directory mirrors,
3794 and fixes a variety of smaller issues including some minor memory leaks.
3796 o Major features (router descriptor cache):
3797 - Store routers in a file called cached-descriptors instead of in
3798 cached-routers. Initialize cached-descriptors from cached-routers
3799 if the old format is around. The new format allows us to store
3800 annotations along with descriptors.
3801 - Use annotations to record the time we received each descriptor, its
3802 source, and its purpose.
3803 - Disable the SETROUTERPURPOSE controller command: it is now
3805 - Controllers should now specify cache=no or cache=yes when using
3806 the +POSTDESCRIPTOR command.
3807 - Bridge authorities now write bridge descriptors to disk, meaning
3808 we can export them to other programs and begin distributing them
3811 o Major features (directory authorities):
3812 - When a v3 authority is missing votes or signatures, it now tries
3814 - Directory authorities track weighted fractional uptime as well as
3815 weighted mean-time-between failures. WFU is suitable for deciding
3816 whether a node is "usually up", while MTBF is suitable for deciding
3817 whether a node is "likely to stay up." We need both, because
3818 "usually up" is a good requirement for guards, while "likely to
3819 stay up" is a good requirement for long-lived connections.
3821 o Major features (v3 directory system):
3822 - Caches now download v3 network status documents as needed,
3823 and download the descriptors listed in them.
3824 - All hosts now attempt to download and keep fresh v3 authority
3825 certificates, and re-attempt after failures.
3826 - More internal-consistency checks for vote parsing.
3828 o Major bugfixes (crashes):
3829 - If a connection is shut down abruptly because of something that
3830 happened inside connection_flushed_some(), do not call
3831 connection_finished_flushing(). Should fix bug 451. Bugfix on
3834 o Major bugfixes (performance):
3835 - Fix really bad O(n^2) performance when parsing a long list of
3836 routers: Instead of searching the entire list for an "extra-info "
3837 string which usually wasn't there, once for every routerinfo
3838 we read, just scan lines forward until we find one we like.
3840 - When we add data to a write buffer in response to the data on that
3841 write buffer getting low because of a flush, do not consider the
3842 newly added data as a candidate for immediate flushing, but rather
3843 make it wait until the next round of writing. Otherwise, we flush
3844 and refill recursively, and a single greedy TLS connection can
3845 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
3847 o Minor features (v3 authority system):
3848 - Add more ways for tools to download the votes that lead to the
3850 - Send a 503 when low on bandwidth and a vote, consensus, or
3851 certificate is requested.
3852 - If-modified-since is now implemented properly for all kinds of
3853 certificate requests.
3855 o Minor bugfixes (network statuses):
3856 - Tweak the implementation of proposal 109 slightly: allow at most
3857 two Tor servers on the same IP address, except if it's the location
3858 of a directory authority, in which case allow five. Bugfix on
3861 o Minor bugfixes (controller):
3862 - When sending a status event to the controller telling it that an
3863 OR address is reachable, set the port correctly. (Previously we
3864 were reporting the dir port.) Bugfix on 0.1.2.x.
3866 o Minor bugfixes (v3 directory system):
3867 - Fix logic to look up a cert by its signing key digest. Bugfix on
3869 - Only change the reply to a vote to "OK" if it's not already
3870 set. This gets rid of annoying "400 OK" log messages, which may
3871 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
3872 - When we get a valid consensus, recompute the voting schedule.
3873 - Base the valid-after time of a vote on the consensus voting
3874 schedule, not on our preferred schedule.
3875 - Make the return values and messages from signature uploads and
3876 downloads more sensible.
3877 - Fix a memory leak when serving votes and consensus documents, and
3878 another when serving certificates.
3880 o Minor bugfixes (performance):
3881 - Use a slightly simpler string hashing algorithm (copying Python's
3882 instead of Java's) and optimize our digest hashing algorithm to take
3883 advantage of 64-bit platforms and to remove some possibly-costly
3885 - Fix a minor memory leak whenever we parse guards from our state
3886 file. Bugfix on 0.2.0.7-alpha.
3887 - Fix a minor memory leak whenever we write out a file. Bugfix on
3889 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
3890 command. Bugfix on 0.2.0.5-alpha.
3892 o Minor bugfixes (portability):
3893 - On some platforms, accept() can return a broken address. Detect
3894 this more quietly, and deal accordingly. Fixes bug 483.
3895 - Stop calling tor_strlower() on uninitialized memory in some cases.
3896 Bugfix in 0.2.0.7-alpha.
3898 o Minor bugfixes (usability):
3899 - Treat some 403 responses from directory servers as INFO rather than
3900 WARN-severity events.
3901 - It's not actually an error to find a non-pending entry in the DNS
3902 cache when canceling a pending resolve. Don't log unless stuff is
3903 fishy. Resolves bug 463.
3905 o Minor bugfixes (anonymity):
3906 - Never report that we've used more bandwidth than we're willing to
3907 relay: it leaks how much non-relay traffic we're using. Resolves
3909 - When looking for a circuit to cannibalize, consider family as well
3910 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
3911 circuit cannibalization).
3913 o Code simplifications and refactoring:
3914 - Make a bunch of functions static. Remove some dead code.
3915 - Pull out about a third of the really big routerlist.c; put it in a
3916 new module, networkstatus.c.
3917 - Merge the extra fields in local_routerstatus_t back into
3918 routerstatus_t: we used to need one routerstatus_t for each
3919 authority's opinion, plus a local_routerstatus_t for the locally
3920 computed consensus opinion. To save space, we put the locally
3921 modified fields into local_routerstatus_t, and only the common
3922 stuff into routerstatus_t. But once v3 directories are in use,
3923 clients and caches will no longer need to hold authority opinions;
3924 thus, the rationale for keeping the types separate is now gone.
3925 - Make the code used to reschedule and reattempt downloads more
3927 - Turn all 'Are we a directory server/mirror?' logic into a call to
3929 - Remove the code to generate the oldest (v1) directory format.
3930 The code has been disabled since 0.2.0.5-alpha.
3933 Changes in version 0.2.0.7-alpha - 2007-09-21
3934 This seventh development snapshot makes bridges work again, makes bridge
3935 authorities work for the first time, fixes two huge performance flaws
3936 in hidden services, and fixes a variety of minor issues.
3938 o New directory authorities:
3939 - Set up moria1 and tor26 as the first v3 directory authorities. See
3940 doc/spec/dir-spec.txt for details on the new directory design.
3942 o Major bugfixes (crashes):
3943 - Fix possible segfaults in functions called from
3944 rend_process_relay_cell(). Bugfix on 0.1.2.x.
3946 o Major bugfixes (bridges):
3947 - Fix a bug that made servers send a "404 Not found" in response to
3948 attempts to fetch their server descriptor. This caused Tor servers
3949 to take many minutes to establish reachability for their DirPort,
3950 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
3951 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
3952 users configure that and specify a bridge with an identity
3953 fingerprint, now they will lookup the bridge descriptor at the
3954 default bridge authority via a one-hop tunnel, but once circuits
3955 are established they will switch to a three-hop tunnel for later
3956 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
3958 o Major bugfixes (hidden services):
3959 - Hidden services were choosing introduction points uniquely by
3960 hexdigest, but when constructing the hidden service descriptor
3961 they merely wrote the (potentially ambiguous) nickname.
3962 - Clients now use the v2 intro format for hidden service
3963 connections: they specify their chosen rendezvous point by identity
3964 digest rather than by (potentially ambiguous) nickname. Both
3965 are bugfixes on 0.1.2.x, and they could speed up hidden service
3966 connections dramatically. Thanks to Karsten Loesing.
3968 o Minor features (security):
3969 - As a client, do not believe any server that tells us that an
3970 address maps to an internal address space.
3971 - Make it possible to enable HashedControlPassword and
3972 CookieAuthentication at the same time.
3974 o Minor features (guard nodes):
3975 - Tag every guard node in our state file with the version that
3976 we believe added it, or with our own version if we add it. This way,
3977 if a user temporarily runs an old version of Tor and then switches
3978 back to a new one, she doesn't automatically lose her guards.
3980 o Minor features (speed):
3981 - When implementing AES counter mode, update only the portions of the
3982 counter buffer that need to change, and don't keep separate
3983 network-order and host-order counters when they are the same (i.e.,
3984 on big-endian hosts.)
3986 o Minor features (controller):
3987 - Accept LF instead of CRLF on controller, since some software has a
3988 hard time generating real Internet newlines.
3989 - Add GETINFO values for the server status events
3990 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
3994 - Routers no longer include bandwidth-history lines in their
3995 descriptors; this information is already available in extra-info
3996 documents, and including it in router descriptors took up 60%
3997 (!) of compressed router descriptor downloads. Completes
3998 implementation of proposal 104.
3999 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
4000 and TorControl.py, as they use the old v0 controller protocol,
4001 and are obsoleted by TorFlow anyway.
4002 - Drop support for v1 rendezvous descriptors, since we never used
4003 them anyway, and the code has probably rotted by now. Based on
4004 patch from Karsten Loesing.
4005 - On OSX, stop warning the user that kqueue support in libevent is
4006 "experimental", since it seems to have worked fine for ages.
4009 - When generating information telling us how to extend to a given
4010 router, do not try to include the nickname if it is absent. Fixes
4011 bug 467. Bugfix on 0.2.0.3-alpha.
4012 - Fix a user-triggerable (but not remotely-triggerable) segfault
4013 in expand_filename(). Bugfix on 0.1.2.x.
4014 - Fix a memory leak when freeing incomplete requests from DNSPort.
4015 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
4016 - Don't try to access (or alter) the state file when running
4017 --list-fingerprint or --verify-config or --hash-password. (Resolves
4018 bug 499.) Bugfix on 0.1.2.x.
4019 - Servers used to decline to publish their DirPort if their
4020 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
4021 were below a threshold. Now they only look at BandwidthRate and
4022 RelayBandwidthRate. Bugfix on 0.1.2.x.
4023 - Remove an optimization in the AES counter-mode code that assumed
4024 that the counter never exceeded 2^68. When the counter can be set
4025 arbitrarily as an IV (as it is by Karsten's new hidden services
4026 code), this assumption no longer holds. Bugfix on 0.1.2.x.
4027 - Resume listing "AUTHORITY" flag for authorities in network status.
4028 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
4030 o Code simplifications and refactoring:
4031 - Revamp file-writing logic so we don't need to have the entire
4032 contents of a file in memory at once before we write to disk. Tor,
4034 - Turn "descriptor store" into a full-fledged type.
4035 - Move all NT services code into a separate source file.
4036 - Unify all code that computes medians, percentile elements, etc.
4037 - Get rid of a needless malloc when parsing address policies.
4040 Changes in version 0.1.2.17 - 2007-08-30
4041 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
4042 X bundles. Vidalia 0.0.14 makes authentication required for the
4043 ControlPort in the default configuration, which addresses important
4044 security risks. Everybody who uses Vidalia (or another controller)
4047 In addition, this Tor update fixes major load balancing problems with
4048 path selection, which should speed things up a lot once many people
4051 o Major bugfixes (security):
4052 - We removed support for the old (v0) control protocol. It has been
4053 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
4054 become more of a headache than it's worth.
4056 o Major bugfixes (load balancing):
4057 - When choosing nodes for non-guard positions, weight guards
4058 proportionally less, since they already have enough load. Patch
4060 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
4061 will allow fast Tor servers to get more attention.
4062 - When we're upgrading from an old Tor version, forget our current
4063 guards and pick new ones according to the new weightings. These
4064 three load balancing patches could raise effective network capacity
4065 by a factor of four. Thanks to Mike Perry for measurements.
4067 o Major bugfixes (stream expiration):
4068 - Expire not-yet-successful application streams in all cases if
4069 they've been around longer than SocksTimeout. Right now there are
4070 some cases where the stream will live forever, demanding a new
4071 circuit every 15 seconds. Fixes bug 454; reported by lodger.
4073 o Minor features (controller):
4074 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
4075 is valid before any authentication has been received. It tells
4076 a controller what kind of authentication is expected, and what
4077 protocol is spoken. Implements proposal 119.
4079 o Minor bugfixes (performance):
4080 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
4081 greatly speeding up loading cached-routers from disk on startup.
4082 - Disable sentinel-based debugging for buffer code: we squashed all
4083 the bugs that this was supposed to detect a long time ago, and now
4084 its only effect is to change our buffer sizes from nice powers of
4085 two (which platform mallocs tend to like) to values slightly over
4086 powers of two (which make some platform mallocs sad).
4088 o Minor bugfixes (misc):
4089 - If exit bandwidth ever exceeds one third of total bandwidth, then
4090 use the correct formula to weight exit nodes when choosing paths.
4091 Based on patch from Mike Perry.
4092 - Choose perfectly fairly among routers when choosing by bandwidth and
4093 weighting by fraction of bandwidth provided by exits. Previously, we
4094 would choose with only approximate fairness, and correct ourselves
4095 if we ran off the end of the list.
4096 - If we require CookieAuthentication but we fail to write the
4097 cookie file, we would warn but not exit, and end up in a state
4098 where no controller could authenticate. Now we exit.
4099 - If we require CookieAuthentication, stop generating a new cookie
4100 every time we change any piece of our config.
4101 - Refuse to start with certain directory authority keys, and
4102 encourage people using them to stop.
4103 - Terminate multi-line control events properly. Original patch
4105 - Fix a minor memory leak when we fail to find enough suitable
4106 servers to choose a circuit.
4107 - Stop leaking part of the descriptor when we run into a particularly
4108 unparseable piece of it.
4111 Changes in version 0.2.0.6-alpha - 2007-08-26
4112 This sixth development snapshot features a new Vidalia version in the
4113 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
4114 the ControlPort in the default configuration, which addresses important
4117 In addition, this snapshot fixes major load balancing problems
4118 with path selection, which should speed things up a lot once many
4119 people have upgraded. The directory authorities also use a new
4120 mean-time-between-failure approach to tracking which servers are stable,
4121 rather than just looking at the most recent uptime.
4123 o New directory authorities:
4124 - Set up Tonga as the default bridge directory authority.
4127 - Directory authorities now track servers by weighted
4128 mean-times-between-failures. When we have 4 or more days of data,
4129 use measured MTBF rather than declared uptime to decide whether
4130 to call a router Stable. Implements proposal 108.
4132 o Major bugfixes (load balancing):
4133 - When choosing nodes for non-guard positions, weight guards
4134 proportionally less, since they already have enough load. Patch
4136 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
4137 will allow fast Tor servers to get more attention.
4138 - When we're upgrading from an old Tor version, forget our current
4139 guards and pick new ones according to the new weightings. These
4140 three load balancing patches could raise effective network capacity
4141 by a factor of four. Thanks to Mike Perry for measurements.
4143 o Major bugfixes (descriptor parsing):
4144 - Handle unexpected whitespace better in malformed descriptors. Bug
4145 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
4148 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
4149 GETINFO for Torstat to use until it can switch to using extrainfos.
4150 - Optionally (if built with -DEXPORTMALLINFO) export the output
4151 of mallinfo via http, as tor/mallinfo.txt. Only accessible
4155 - Do not intermix bridge routers with controller-added
4156 routers. (Bugfix on 0.2.0.x)
4157 - Do not fail with an assert when accept() returns an unexpected
4158 address family. Addresses but does not wholly fix bug 483. (Bugfix
4160 - Let directory authorities startup even when they can't generate
4161 a descriptor immediately, e.g. because they don't know their
4163 - Stop putting the authentication cookie in a file called "0"
4164 in your working directory if you don't specify anything for the
4165 new CookieAuthFile option. Reported by Matt Edman.
4166 - Make it possible to read the PROTOCOLINFO response in a way that
4167 conforms to our control-spec. Reported by Matt Edman.
4168 - Fix a minor memory leak when we fail to find enough suitable
4169 servers to choose a circuit. Bugfix on 0.1.2.x.
4170 - Stop leaking part of the descriptor when we run into a particularly
4171 unparseable piece of it. Bugfix on 0.1.2.x.
4172 - Unmap the extrainfo cache file on exit.
4175 Changes in version 0.2.0.5-alpha - 2007-08-19
4176 This fifth development snapshot fixes compilation on Windows again;
4177 fixes an obnoxious client-side bug that slowed things down and put
4178 extra load on the network; gets us closer to using the v3 directory
4179 voting scheme; makes it easier for Tor controllers to use cookie-based
4180 authentication; and fixes a variety of other bugs.
4183 - Version 1 directories are no longer generated in full. Instead,
4184 authorities generate and serve "stub" v1 directories that list
4185 no servers. This will stop Tor versions 0.1.0.x and earlier from
4186 working, but (for security reasons) nobody should be running those
4189 o Major bugfixes (compilation, 0.2.0.x):
4190 - Try to fix Win32 compilation again: improve checking for IPv6 types.
4191 - Try to fix MSVC compilation: build correctly on platforms that do
4192 not define s6_addr16 or s6_addr32.
4193 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
4196 o Major bugfixes (stream expiration):
4197 - Expire not-yet-successful application streams in all cases if
4198 they've been around longer than SocksTimeout. Right now there are
4199 some cases where the stream will live forever, demanding a new
4200 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
4203 o Minor features (directory servers):
4204 - When somebody requests a list of statuses or servers, and we have
4205 none of those, return a 404 rather than an empty 200.
4207 o Minor features (directory voting):
4208 - Store v3 consensus status consensuses on disk, and reload them
4211 o Minor features (security):
4212 - Warn about unsafe ControlPort configurations.
4213 - Refuse to start with certain directory authority keys, and
4214 encourage people using them to stop.
4216 o Minor features (controller):
4217 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
4218 is valid before any authentication has been received. It tells
4219 a controller what kind of authentication is expected, and what
4220 protocol is spoken. Implements proposal 119.
4221 - New config option CookieAuthFile to choose a new location for the
4222 cookie authentication file, and config option
4223 CookieAuthFileGroupReadable to make it group-readable.
4225 o Minor features (unit testing):
4226 - Add command-line arguments to unit-test executable so that we can
4227 invoke any chosen test from the command line rather than having
4228 to run the whole test suite at once; and so that we can turn on
4229 logging for the unit tests.
4231 o Minor bugfixes (on 0.1.2.x):
4232 - If we require CookieAuthentication but we fail to write the
4233 cookie file, we would warn but not exit, and end up in a state
4234 where no controller could authenticate. Now we exit.
4235 - If we require CookieAuthentication, stop generating a new cookie
4236 every time we change any piece of our config.
4237 - When loading bandwidth history, do not believe any information in
4238 the future. Fixes bug 434.
4239 - When loading entry guard information, do not believe any information
4241 - When we have our clock set far in the future and generate an
4242 onion key, then re-set our clock to be correct, we should not stop
4243 the onion key from getting rotated.
4244 - Clean up torrc sample config file.
4245 - Do not automatically run configure from autogen.sh. This
4246 non-standard behavior tended to annoy people who have built other
4249 o Minor bugfixes (on 0.2.0.x):
4250 - Fix a bug with AutomapHostsOnResolve that would always cause
4251 the second request to fail. Bug reported by Kate. Bugfix on
4253 - Fix a bug in ADDRMAP controller replies that would sometimes
4254 try to print a NULL. Patch from tup.
4255 - Read v3 directory authority keys from the right location.
4256 - Numerous bugfixes to directory voting code.
4259 Changes in version 0.1.2.16 - 2007-08-01
4260 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
4261 remote attacker in certain situations to rewrite the user's torrc
4262 configuration file. This can completely compromise anonymity of users
4263 in most configurations, including those running the Vidalia bundles,
4264 TorK, etc. Or worse.
4266 o Major security fixes:
4267 - Close immediately after missing authentication on control port;
4268 do not allow multiple authentication attempts.
4271 Changes in version 0.2.0.4-alpha - 2007-08-01
4272 This fourth development snapshot fixes a critical security vulnerability
4273 for most users, specifically those running Vidalia, TorK, etc. Everybody
4274 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
4276 o Major security fixes:
4277 - Close immediately after missing authentication on control port;
4278 do not allow multiple authentication attempts.
4280 o Major bugfixes (compilation):
4281 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
4284 o Minor features (performance):
4285 - Be even more aggressive about releasing RAM from small
4286 empty buffers. Thanks to our free-list code, this shouldn't be too
4287 performance-intensive.
4288 - Disable sentinel-based debugging for buffer code: we squashed all
4289 the bugs that this was supposed to detect a long time ago, and
4290 now its only effect is to change our buffer sizes from nice
4291 powers of two (which platform mallocs tend to like) to values
4292 slightly over powers of two (which make some platform mallocs sad).
4293 - Log malloc statistics from mallinfo() on platforms where it
4297 Changes in version 0.2.0.3-alpha - 2007-07-29
4298 This third development snapshot introduces new experimental
4299 blocking-resistance features and a preliminary version of the v3
4300 directory voting design, and includes many other smaller features
4304 - The first pieces of our "bridge" design for blocking-resistance
4305 are implemented. People can run bridge directory authorities;
4306 people can run bridges; and people can configure their Tor clients
4307 with a set of bridges to use as the first hop into the Tor network.
4308 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
4310 - Create listener connections before we setuid to the configured
4311 User and Group. Now non-Windows users can choose port values
4312 under 1024, start Tor as root, and have Tor bind those ports
4313 before it changes to another UID. (Windows users could already
4315 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
4316 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
4317 on "vserver" accounts. (Patch from coderman.)
4318 - Be even more aggressive about separating local traffic from relayed
4319 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
4321 o Major features (experimental):
4322 - First cut of code for "v3 dir voting": directory authorities will
4323 vote on a common network status document rather than each publishing
4324 their own opinion. This code needs more testing and more corner-case
4325 handling before it's ready for use.
4328 - Directory authorities now call routers Fast if their bandwidth is
4329 at least 100KB/s, and consider their bandwidth adequate to be a
4330 Guard if it is at least 250KB/s, no matter the medians. This fix
4331 complements proposal 107. [Bugfix on 0.1.2.x]
4332 - Directory authorities now never mark more than 3 servers per IP as
4333 Valid and Running. (Implements proposal 109, by Kevin Bauer and
4335 - Minor change to organizationName and commonName generation
4336 procedures in TLS certificates during Tor handshakes, to invalidate
4337 some earlier censorware approaches. This is not a long-term
4338 solution, but applying it will give us a bit of time to look into
4339 the epidemiology of countermeasures as they spread.
4341 o Major bugfixes (directory):
4342 - Rewrite directory tokenization code to never run off the end of
4343 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
4345 o Minor features (controller):
4346 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
4347 match requests to applications. (Patch from Robert Hogan.)
4348 - Report address and port correctly on connections to DNSPort. (Patch
4350 - Add a RESOLVE command to launch hostname lookups. (Original patch
4352 - Add GETINFO status/enough-dir-info to let controllers tell whether
4353 Tor has downloaded sufficient directory information. (Patch
4355 - You can now use the ControlSocket option to tell Tor to listen for
4356 controller connections on Unix domain sockets on systems that
4357 support them. (Patch from Peter Palfrader.)
4358 - STREAM NEW events are generated for DNSPort requests and for
4359 tunneled directory connections. (Patch from Robert Hogan.)
4360 - New "GETINFO address-mappings/*" command to get address mappings
4361 with expiry information. "addr-mappings/*" is now deprecated.
4364 o Minor features (misc):
4365 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
4367 - The tor-gencert tool for v3 directory authorities now creates all
4368 files as readable to the file creator only, and write-protects
4369 the authority identity key.
4370 - When dumping memory usage, list bytes used in buffer memory
4372 - When running with dmalloc, dump more stats on hup and on exit.
4373 - Directory authorities now fail quickly and (relatively) harmlessly
4374 if they generate a network status document that is somehow
4377 o Traffic load balancing improvements:
4378 - If exit bandwidth ever exceeds one third of total bandwidth, then
4379 use the correct formula to weight exit nodes when choosing paths.
4380 (Based on patch from Mike Perry.)
4381 - Choose perfectly fairly among routers when choosing by bandwidth and
4382 weighting by fraction of bandwidth provided by exits. Previously, we
4383 would choose with only approximate fairness, and correct ourselves
4384 if we ran off the end of the list. [Bugfix on 0.1.2.x]
4386 o Performance improvements:
4387 - Be more aggressive with freeing buffer RAM or putting it on the
4389 - Use Critical Sections rather than Mutexes for synchronizing threads
4390 on win32; Mutexes are heavier-weight, and designed for synchronizing
4393 o Deprecated and removed features:
4394 - RedirectExits is now deprecated.
4395 - Stop allowing address masks that do not correspond to bit prefixes.
4396 We have warned about these for a really long time; now it's time
4397 to reject them. (Patch from croup.)
4399 o Minor bugfixes (directory):
4400 - Fix another crash bug related to extra-info caching. (Bug found by
4401 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
4402 - Directories no longer return a "304 not modified" when they don't
4403 have the networkstatus the client asked for. Also fix a memory
4404 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
4405 - We had accidentally labelled 0.1.2.x directory servers as not
4406 suitable for begin_dir requests, and had labelled no directory
4407 servers as suitable for uploading extra-info documents. [Bugfix
4410 o Minor bugfixes (dns):
4411 - Fix a crash when DNSPort is set more than once. (Patch from Robert
4412 Hogan.) [Bugfix on 0.2.0.2-alpha]
4413 - Add DNSPort connections to the global connection list, so that we
4414 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
4416 - Fix a dangling reference that could lead to a crash when DNSPort is
4417 changed or closed (Patch from Robert Hogan.) [Bugfix on
4420 o Minor bugfixes (controller):
4421 - Provide DNS expiry times in GMT, not in local time. For backward
4422 compatibility, ADDRMAP events only provide GMT expiry in an extended
4423 field. "GETINFO address-mappings" always does the right thing.
4424 - Use CRLF line endings properly in NS events.
4425 - Terminate multi-line control events properly. (Original patch
4426 from tup.) [Bugfix on 0.1.2.x-alpha]
4427 - Do not include spaces in SOURCE_ADDR fields in STREAM
4428 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
4431 Changes in version 0.1.2.15 - 2007-07-17
4432 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
4433 problems, fixes compilation on BSD, and fixes a variety of other
4434 bugs. Everybody should upgrade.
4436 o Major bugfixes (compilation):
4437 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
4439 o Major bugfixes (crashes):
4440 - Try even harder not to dereference the first character after
4441 an mmap(). Reported by lodger.
4442 - Fix a crash bug in directory authorities when we re-number the
4443 routerlist while inserting a new router.
4444 - When the cached-routers file is an even multiple of the page size,
4445 don't run off the end and crash. (Fixes bug 455; based on idea
4447 - Fix eventdns.c behavior on Solaris: It is critical to include
4448 orconfig.h _before_ sys/types.h, so that we can get the expected
4449 definition of _FILE_OFFSET_BITS.
4451 o Major bugfixes (security):
4452 - Fix a possible buffer overrun when using BSD natd support. Bug
4454 - When sending destroy cells from a circuit's origin, don't include
4455 the reason for tearing down the circuit. The spec says we didn't,
4456 and now we actually don't. Reported by lodger.
4457 - Keep streamids from different exits on a circuit separate. This
4458 bug may have allowed other routers on a given circuit to inject
4459 cells into streams. Reported by lodger; fixes bug 446.
4460 - If there's a never-before-connected-to guard node in our list,
4461 never choose any guards past it. This way we don't expand our
4462 guard list unless we need to.
4464 o Minor bugfixes (guard nodes):
4465 - Weight guard selection by bandwidth, so that low-bandwidth nodes
4466 don't get overused as guards.
4468 o Minor bugfixes (directory):
4469 - Correctly count the number of authorities that recommend each
4470 version. Previously, we were under-counting by 1.
4471 - Fix a potential crash bug when we load many server descriptors at
4472 once and some of them make others of them obsolete. Fixes bug 458.
4474 o Minor bugfixes (hidden services):
4475 - Stop tearing down the whole circuit when the user asks for a
4476 connection to a port that the hidden service didn't configure.
4479 o Minor bugfixes (misc):
4480 - On Windows, we were preventing other processes from reading
4481 cached-routers while Tor was running. Reported by janbar.
4482 - Fix a possible (but very unlikely) bug in picking routers by
4483 bandwidth. Add a log message to confirm that it is in fact
4484 unlikely. Patch from lodger.
4485 - Backport a couple of memory leak fixes.
4486 - Backport miscellaneous cosmetic bugfixes.
4489 Changes in version 0.2.0.2-alpha - 2007-06-02
4490 o Major bugfixes on 0.2.0.1-alpha:
4491 - Fix an assertion failure related to servers without extra-info digests.
4492 Resolves bugs 441 and 442.
4494 o Minor features (directory):
4495 - Support "If-Modified-Since" when answering HTTP requests for
4496 directories, running-routers documents, and network-status documents.
4497 (There's no need to support it for router descriptors, since those
4498 are downloaded by descriptor digest.)
4500 o Minor build issues:
4501 - Clear up some MIPSPro compiler warnings.
4502 - When building from a tarball on a machine that happens to have SVK
4503 installed, report the micro-revision as whatever version existed
4504 in the tarball, not as "x".
4507 Changes in version 0.2.0.1-alpha - 2007-06-01
4508 This early development snapshot provides new features for people running
4509 Tor as both a client and a server (check out the new RelayBandwidth
4510 config options); lets Tor run as a DNS proxy; and generally moves us
4511 forward on a lot of fronts.
4513 o Major features, server usability:
4514 - New config options RelayBandwidthRate and RelayBandwidthBurst:
4515 a separate set of token buckets for relayed traffic. Right now
4516 relayed traffic is defined as answers to directory requests, and
4517 OR connections that don't have any local circuits on them.
4519 o Major features, client usability:
4520 - A client-side DNS proxy feature to replace the need for
4521 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
4522 for DNS requests on port 9999, use the Tor network to resolve them
4523 anonymously, and send the reply back like a regular DNS server.
4524 The code still only implements a subset of DNS.
4525 - Make PreferTunneledDirConns and TunnelDirConns work even when
4526 we have no cached directory info. This means Tor clients can now
4527 do all of their connections protected by TLS.
4529 o Major features, performance and efficiency:
4530 - Directory authorities accept and serve "extra info" documents for
4531 routers. These documents contain fields from router descriptors
4532 that aren't usually needed, and that use a lot of excess
4533 bandwidth. Once these fields are removed from router descriptors,
4534 the bandwidth savings should be about 60%. [Partially implements
4536 - Servers upload extra-info documents to any authority that accepts
4537 them. Authorities (and caches that have been configured to download
4538 extra-info documents) download them as needed. [Partially implements
4540 - Change the way that Tor buffers data that it is waiting to write.
4541 Instead of queueing data cells in an enormous ring buffer for each
4542 client->OR or OR->OR connection, we now queue cells on a separate
4543 queue for each circuit. This lets us use less slack memory, and
4544 will eventually let us be smarter about prioritizing different kinds
4546 - Use memory pools to allocate cells with better speed and memory
4547 efficiency, especially on platforms where malloc() is inefficient.
4548 - Stop reading on edge connections when their corresponding circuit
4549 buffers are full; start again as the circuits empty out.
4551 o Major features, other:
4552 - Add an HSAuthorityRecordStats option that hidden service authorities
4553 can use to track statistics of overall hidden service usage without
4554 logging information that would be very useful to an attacker.
4555 - Start work implementing multi-level keys for directory authorities:
4556 Add a standalone tool to generate key certificates. (Proposal 103.)
4559 - Directory authorities now call routers Stable if they have an
4560 uptime of at least 30 days, even if that's not the median uptime
4561 in the network. Implements proposal 107, suggested by Kevin Bauer
4564 o Minor fixes (resource management):
4565 - Count the number of open sockets separately from the number
4566 of active connection_t objects. This will let us avoid underusing
4567 our allocated connection limit.
4568 - We no longer use socket pairs to link an edge connection to an
4569 anonymous directory connection or a DirPort test connection.
4570 Instead, we track the link internally and transfer the data
4571 in-process. This saves two sockets per "linked" connection (at the
4572 client and at the server), and avoids the nasty Windows socketpair()
4574 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
4575 for every single inactive connection_t. Free items from the
4576 4k/16k-buffer free lists when they haven't been used for a while.
4578 o Minor features (build):
4579 - Make autoconf search for libevent, openssl, and zlib consistently.
4580 - Update deprecated macros in configure.in.
4581 - When warning about missing headers, tell the user to let us
4582 know if the compile succeeds anyway, so we can downgrade the
4584 - Include the current subversion revision as part of the version
4585 string: either fetch it directly if we're in an SVN checkout, do
4586 some magic to guess it if we're in an SVK checkout, or use
4587 the last-detected version if we're building from a .tar.gz.
4588 Use this version consistently in log messages.
4590 o Minor features (logging):
4591 - Always prepend "Bug: " to any log message about a bug.
4592 - Put a platform string (e.g. "Linux i686") in the startup log
4593 message, so when people paste just their logs, we know if it's
4594 OpenBSD or Windows or what.
4595 - When logging memory usage, break down memory used in buffers by
4598 o Minor features (directory system):
4599 - New config option V2AuthoritativeDirectory that all directory
4600 authorities should set. This will let future authorities choose
4601 not to serve V2 directory information.
4602 - Directory authorities allow multiple router descriptors and/or extra
4603 info documents to be uploaded in a single go. This will make
4604 implementing proposal 104 simpler.
4606 o Minor features (controller):
4607 - Add a new config option __DisablePredictedCircuits designed for
4608 use by the controller, when we don't want Tor to build any circuits
4610 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
4611 so we can exit from the middle of the circuit.
4612 - Implement "getinfo status/circuit-established".
4613 - Implement "getinfo status/version/..." so a controller can tell
4614 whether the current version is recommended, and whether any versions
4615 are good, and how many authorities agree. (Patch from shibz.)
4617 o Minor features (hidden services):
4618 - Allow multiple HiddenServicePort directives with the same virtual
4619 port; when they occur, the user is sent round-robin to one
4620 of the target ports chosen at random. Partially fixes bug 393 by
4621 adding limited ad-hoc round-robining.
4623 o Minor features (other):
4625 - Add a new AutomapHostsOnResolve option: when it is enabled, any
4626 resolve request for hosts matching a given pattern causes Tor to
4627 generate an internal virtual address mapping for that host. This
4628 allows DNSPort to work sensibly with hidden service users. By
4629 default, .exit and .onion addresses are remapped; the list of
4630 patterns can be reconfigured with AutomapHostsSuffixes.
4631 - Add an "-F" option to tor-resolve to force a resolve for a .onion
4632 address. Thanks to the AutomapHostsOnResolve option, this is no
4633 longer a completely silly thing to do.
4634 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
4635 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
4636 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
4637 minus 1 byte: the actual maximum declared bandwidth.
4640 - Removed support for the old binary "version 0" controller protocol.
4641 This has been deprecated since 0.1.1, and warnings have been issued
4642 since 0.1.2. When we encounter a v0 control message, we now send
4643 back an error and close the connection.
4644 - Remove the old "dns worker" server DNS code: it hasn't been default
4645 since 0.1.2.2-alpha, and all the servers seem to be using the new
4648 o Minor bugfixes (portability):
4649 - Even though Windows is equally happy with / and \ as path separators,
4650 try to use \ consistently on Windows and / consistently on Unix: it
4651 makes the log messages nicer.
4652 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
4653 - Read resolv.conf files correctly on platforms where read() returns
4654 partial results on small file reads.
4656 o Minor bugfixes (directory):
4657 - Correctly enforce that elements of directory objects do not appear
4658 more often than they are allowed to appear.
4659 - When we are reporting the DirServer line we just parsed, we were
4660 logging the second stanza of the key fingerprint, not the first.
4662 o Minor bugfixes (logging):
4663 - When we hit an EOF on a log (probably because we're shutting down),
4664 don't try to remove the log from the list: just mark it as
4665 unusable. (Bulletproofs against bug 222.)
4667 o Minor bugfixes (other):
4668 - In the exitlist script, only consider the most recently published
4669 server descriptor for each server. Also, when the user requests
4670 a list of servers that _reject_ connections to a given address,
4671 explicitly exclude the IPs that also have servers that accept
4672 connections to that address. (Resolves bug 405.)
4673 - Stop allowing hibernating servers to be "stable" or "fast".
4674 - On Windows, we were preventing other processes from reading
4675 cached-routers while Tor was running. (Reported by janbar)
4676 - Make the NodeFamilies config option work. (Reported by
4677 lodger -- it has never actually worked, even though we added it
4679 - Check return values from pthread_mutex functions.
4680 - Don't save non-general-purpose router descriptors to the disk cache,
4681 because we have no way of remembering what their purpose was when
4683 - Add even more asserts to hunt down bug 417.
4684 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
4685 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
4686 Add a log message to confirm that it is in fact unlikely.
4688 o Minor bugfixes (controller):
4689 - Make 'getinfo fingerprint' return a 551 error if we're not a
4690 server, so we match what the control spec claims we do. Reported
4692 - Fix a typo in an error message when extendcircuit fails that
4693 caused us to not follow the \r\n-based delimiter protocol. Reported
4696 o Code simplifications and refactoring:
4697 - Stop passing around circuit_t and crypt_path_t pointers that are
4698 implicit in other procedure arguments.
4699 - Drop the old code to choke directory connections when the
4700 corresponding OR connections got full: thanks to the cell queue
4701 feature, OR conns don't get full any more.
4702 - Make dns_resolve() handle attaching connections to circuits
4703 properly, so the caller doesn't have to.
4704 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
4705 - Keep the connection array as a dynamic smartlist_t, rather than as
4706 a fixed-sized array. This is important, as the number of connections
4707 is becoming increasingly decoupled from the number of sockets.
4710 Changes in version 0.1.2.14 - 2007-05-25
4711 Tor 0.1.2.14 changes the addresses of two directory authorities (this
4712 change especially affects those who serve or use hidden services),
4713 and fixes several other crash- and security-related bugs.
4715 o Directory authority changes:
4716 - Two directory authorities (moria1 and moria2) just moved to new
4717 IP addresses. This change will particularly affect those who serve
4718 or use hidden services.
4720 o Major bugfixes (crashes):
4721 - If a directory server runs out of space in the connection table
4722 as it's processing a begin_dir request, it will free the exit stream
4723 but leave it attached to the circuit, leading to unpredictable
4724 behavior. (Reported by seeess, fixes bug 425.)
4725 - Fix a bug in dirserv_remove_invalid() that would cause authorities
4726 to corrupt memory under some really unlikely scenarios.
4727 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
4728 - Avoid segfaults when reading from mmaped descriptor file. (Reported
4731 o Major bugfixes (security):
4732 - When choosing an entry guard for a circuit, avoid using guards
4733 that are in the same family as the chosen exit -- not just guards
4734 that are exactly the chosen exit. (Reported by lodger.)
4736 o Major bugfixes (resource management):
4737 - If a directory authority is down, skip it when deciding where to get
4738 networkstatus objects or descriptors. Otherwise we keep asking
4739 every 10 seconds forever. Fixes bug 384.
4740 - Count it as a failure if we fetch a valid network-status but we
4741 don't want to keep it. Otherwise we'll keep fetching it and keep
4742 not wanting to keep it. Fixes part of bug 422.
4743 - If all of our dirservers have given us bad or no networkstatuses
4744 lately, then stop hammering them once per minute even when we
4745 think they're failed. Fixes another part of bug 422.
4748 - Actually set the purpose correctly for descriptors inserted with
4750 - When we have k non-v2 authorities in our DirServer config,
4751 we ignored the last k authorities in the list when updating our
4753 - Correctly back-off from requesting router descriptors that we are
4754 having a hard time downloading.
4755 - Read resolv.conf files correctly on platforms where read() returns
4756 partial results on small file reads.
4757 - Don't rebuild the entire router store every time we get 32K of
4758 routers: rebuild it when the journal gets very large, or when
4759 the gaps in the store get very large.
4762 - When routers publish SVN revisions in their router descriptors,
4763 authorities now include those versions correctly in networkstatus
4765 - Warn when using a version of libevent before 1.3b to run a server on
4766 OSX or BSD: these versions interact badly with userspace threads.
4769 Changes in version 0.1.2.13 - 2007-04-24
4770 This release features some major anonymity fixes, such as safer path
4771 selection; better client performance; faster bootstrapping, better
4772 address detection, and better DNS support for servers; write limiting as
4773 well as read limiting to make servers easier to run; and a huge pile of
4774 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
4776 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
4777 of the Freenode IRC network, remembering his patience and vision for
4778 free speech on the Internet.
4781 - Fix a memory leak when we ask for "all" networkstatuses and we
4782 get one we don't recognize.
4783 - Add more asserts to hunt down bug 417.
4784 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
4787 Changes in version 0.1.2.12-rc - 2007-03-16
4789 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
4790 directory information requested inside Tor connections (i.e. via
4791 begin_dir cells). It only triggered when the same connection was
4792 serving other data at the same time. Reported by seeess.
4795 - When creating a circuit via the controller, send a 'launched'
4796 event when we're done, so we follow the spec better.
4799 Changes in version 0.1.2.11-rc - 2007-03-15
4800 o Minor bugfixes (controller), reported by daejees:
4801 - Correct the control spec to match how the code actually responds
4802 to 'getinfo addr-mappings/*'.
4803 - The control spec described a GUARDS event, but the code
4804 implemented a GUARD event. Standardize on GUARD, but let people
4808 Changes in version 0.1.2.10-rc - 2007-03-07
4809 o Major bugfixes (Windows):
4810 - Do not load the NT services library functions (which may not exist)
4811 just to detect if we're a service trying to shut down. Now we run
4812 on Win98 and friends again.
4814 o Minor bugfixes (other):
4815 - Clarify a couple of log messages.
4816 - Fix a misleading socks5 error number.
4819 Changes in version 0.1.2.9-rc - 2007-03-02
4820 o Major bugfixes (Windows):
4821 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
4822 of the usual GCC "%llu". This prevents a bug when saving 64-bit
4823 int configuration values: the high-order 32 bits would get
4824 truncated. In particular, we were being bitten by the default
4825 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
4826 and maybe also bug 397.)
4828 o Minor bugfixes (performance):
4829 - Use OpenSSL's AES implementation on platforms where it's faster.
4830 This could save us as much as 10% CPU usage.
4832 o Minor bugfixes (server):
4833 - Do not rotate onion key immediately after setting it for the first
4836 o Minor bugfixes (directory authorities):
4837 - Stop calling servers that have been hibernating for a long time
4838 "stable". Also, stop letting hibernating or obsolete servers affect
4839 uptime and bandwidth cutoffs.
4840 - Stop listing hibernating servers in the v1 directory.
4842 o Minor bugfixes (hidden services):
4843 - Upload hidden service descriptors slightly less often, to reduce
4844 load on authorities.
4846 o Minor bugfixes (other):
4847 - Fix an assert that could trigger if a controller quickly set then
4848 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
4849 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
4851 - Fix a potential race condition in the rpm installer. Found by
4853 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
4854 of 2 as indicating that the server is completely bad; it sometimes
4855 means that the server is just bad for the request in question. (may fix
4856 the last of bug 326.)
4857 - Disable encrypted directory connections when we don't have a server
4858 descriptor for the destination. We'll get this working again in
4862 Changes in version 0.1.2.8-beta - 2007-02-26
4863 o Major bugfixes (crashes):
4864 - Stop crashing when the controller asks us to resetconf more than
4865 one config option at once. (Vidalia 0.0.11 does this.)
4866 - Fix a crash that happened on Win98 when we're given command-line
4867 arguments: don't try to load NT service functions from advapi32.dll
4868 except when we need them. (Bug introduced in 0.1.2.7-alpha;
4870 - Fix a longstanding obscure crash bug that could occur when
4871 we run out of DNS worker processes. (Resolves bug 390.)
4873 o Major bugfixes (hidden services):
4874 - Correctly detect whether hidden service descriptor downloads are
4875 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
4877 o Major bugfixes (accounting):
4878 - When we start during an accounting interval before it's time to wake
4879 up, remember to wake up at the correct time. (May fix bug 342.)
4881 o Minor bugfixes (controller):
4882 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
4883 clear the corresponding on_circuit variable, and remember later
4884 that we don't need to send a redundant CLOSED event. (Resolves part
4886 - Report events where a resolve succeeded or where we got a socks
4887 protocol error correctly, rather than calling both of them
4889 - Change reported stream target addresses to IP consistently when
4890 we finally get the IP from an exit node.
4891 - Send log messages to the controller even if they happen to be very
4894 o Minor bugfixes (other):
4895 - Display correct results when reporting which versions are
4896 recommended, and how recommended they are. (Resolves bug 383.)
4897 - Improve our estimates for directory bandwidth to be less random:
4898 guess that an unrecognized directory will have the average bandwidth
4899 from all known directories, not that it will have the average
4900 bandwidth from those directories earlier than it on the list.
4901 - If we start a server with ClientOnly 1, then set ClientOnly to 0
4902 and hup, stop triggering an assert based on an empty onion_key.
4903 - On platforms with no working mmap() equivalent, don't warn the
4904 user when cached-routers doesn't exist.
4905 - Warn the user when mmap() [or its equivalent] fails for some reason
4906 other than file-not-found.
4907 - Don't warn the user when cached-routers.new doesn't exist: that's
4908 perfectly fine when starting up for the first time.
4909 - When EntryNodes are configured, rebuild the guard list to contain,
4910 in order: the EntryNodes that were guards before; the rest of the
4911 EntryNodes; the nodes that were guards before.
4912 - Mask out all signals in sub-threads; only the libevent signal
4913 handler should be processing them. This should prevent some crashes
4914 on some machines using pthreads. (Patch from coderman.)
4915 - Fix switched arguments on memset in the implementation of
4916 tor_munmap() for systems with no mmap() call.
4917 - When Tor receives a router descriptor that it asked for, but
4918 no longer wants (because it has received fresh networkstatuses
4919 in the meantime), do not warn the user. Cache the descriptor if
4920 we're a cache; drop it if we aren't.
4921 - Make earlier entry guards _really_ get retried when the network
4923 - On a malformed DNS reply, always give an error to the corresponding
4925 - Build with recent libevents on platforms that do not define the
4926 nonstandard types "u_int8_t" and friends.
4928 o Minor features (controller):
4929 - Warn the user when an application uses the obsolete binary v0
4930 control protocol. We're planning to remove support for it during
4931 the next development series, so it's good to give people some
4933 - Add STREAM_BW events to report per-entry-stream bandwidth
4934 use. (Patch from Robert Hogan.)
4935 - Rate-limit SIGNEWNYM signals in response to controllers that
4936 impolitely generate them for every single stream. (Patch from
4937 mwenge; closes bug 394.)
4938 - Make REMAP stream events have a SOURCE (cache or exit), and
4939 make them generated in every case where we get a successful
4940 connected or resolved cell.
4942 o Minor bugfixes (performance):
4943 - Call router_have_min_dir_info half as often. (This is showing up in
4944 some profiles, but not others.)
4945 - When using GCC, make log_debug never get called at all, and its
4946 arguments never get evaluated, when no debug logs are configured.
4947 (This is showing up in some profiles, but not others.)
4950 - Remove some never-implemented options. Mark PathlenCoinWeight as
4952 - Implement proposal 106: Stop requiring clients to have well-formed
4953 certificates; stop checking nicknames in certificates. (Clients
4954 have certificates so that they can look like Tor servers, but in
4955 the future we might want to allow them to look like regular TLS
4956 clients instead. Nicknames in certificates serve no purpose other
4957 than making our protocol easier to recognize on the wire.)
4958 - Revise messages on handshake failure again to be even more clear about
4959 which are incoming connections and which are outgoing.
4960 - Discard any v1 directory info that's over 1 month old (for
4961 directories) or over 1 week old (for running-routers lists).
4962 - Do not warn when individual nodes in the configuration's EntryNodes,
4963 ExitNodes, etc are down: warn only when all possible nodes
4964 are down. (Fixes bug 348.)
4965 - Always remove expired routers and networkstatus docs before checking
4966 whether we have enough information to build circuits. (Fixes
4968 - Put a lower-bound on MaxAdvertisedBandwidth.
4971 Changes in version 0.1.2.7-alpha - 2007-02-06
4972 o Major bugfixes (rate limiting):
4973 - Servers decline directory requests much more aggressively when
4974 they're low on bandwidth. Otherwise they end up queueing more and
4975 more directory responses, which can't be good for latency.
4976 - But never refuse directory requests from local addresses.
4977 - Fix a memory leak when sending a 503 response for a networkstatus
4979 - Be willing to read or write on local connections (e.g. controller
4980 connections) even when the global rate limiting buckets are empty.
4981 - If our system clock jumps back in time, don't publish a negative
4982 uptime in the descriptor. Also, don't let the global rate limiting
4983 buckets go absurdly negative.
4984 - Flush local controller connection buffers periodically as we're
4985 writing to them, so we avoid queueing 4+ megabytes of data before
4988 o Major bugfixes (NT services):
4989 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
4990 command-line flag so that admins can override the default by saying
4991 "tor --service install --user "SomeUser"". This will not affect
4992 existing installed services. Also, warn the user that the service
4993 will look for its configuration file in the service user's
4994 %appdata% directory. (We can't do the 'hardwire the user's appdata
4995 directory' trick any more, since we may not have read access to that
4998 o Major bugfixes (other):
4999 - Previously, we would cache up to 16 old networkstatus documents
5000 indefinitely, if they came from nontrusted authorities. Now we
5001 discard them if they are more than 10 days old.
5002 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
5004 - Detect and reject malformed DNS responses containing circular
5006 - If exits are rare enough that we're not marking exits as guards,
5007 ignore exit bandwidth when we're deciding the required bandwidth
5009 - When we're handling a directory connection tunneled over Tor,
5010 don't fill up internal memory buffers with all the data we want
5011 to tunnel; instead, only add it if the OR connection that will
5012 eventually receive it has some room for it. (This can lead to
5013 slowdowns in tunneled dir connections; a better solution will have
5016 o Minor bugfixes (dns):
5017 - Add some defensive programming to eventdns.c in an attempt to catch
5018 possible memory-stomping bugs.
5019 - Detect and reject DNS replies containing IPv4 or IPv6 records with
5020 an incorrect number of bytes. (Previously, we would ignore the
5022 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
5023 in the correct order, and doesn't crash.
5024 - Free memory held in recently-completed DNS lookup attempts on exit.
5025 This was not a memory leak, but may have been hiding memory leaks.
5026 - Handle TTL values correctly on reverse DNS lookups.
5027 - Treat failure to parse resolv.conf as an error.
5029 o Minor bugfixes (other):
5030 - Fix crash with "tor --list-fingerprint" (reported by seeess).
5031 - When computing clock skew from directory HTTP headers, consider what
5032 time it was when we finished asking for the directory, not what
5034 - Expire socks connections if they spend too long waiting for the
5035 handshake to finish. Previously we would let them sit around for
5036 days, if the connecting application didn't close them either.
5037 - And if the socks handshake hasn't started, don't send a
5038 "DNS resolve socks failed" handshake reply; just close it.
5039 - Stop using C functions that OpenBSD's linker doesn't like.
5040 - Don't launch requests for descriptors unless we have networkstatuses
5041 from at least half of the authorities. This delays the first
5042 download slightly under pathological circumstances, but can prevent
5043 us from downloading a bunch of descriptors we don't need.
5044 - Do not log IPs with TLS failures for incoming TLS
5045 connections. (Fixes bug 382.)
5046 - If the user asks to use invalid exit nodes, be willing to use
5048 - Stop using the reserved ac_cv namespace in our configure script.
5049 - Call stat() slightly less often; use fstat() when possible.
5050 - Refactor the way we handle pending circuits when an OR connection
5051 completes or fails, in an attempt to fix a rare crash bug.
5052 - Only rewrite a conn's address based on X-Forwarded-For: headers
5053 if it's a parseable public IP address; and stop adding extra quotes
5054 to the resulting address.
5057 - Weight directory requests by advertised bandwidth. Now we can
5058 let servers enable write limiting but still allow most clients to
5059 succeed at their directory requests. (We still ignore weights when
5060 choosing a directory authority; I hope this is a feature.)
5063 - Create a new file ReleaseNotes which was the old ChangeLog. The
5064 new ChangeLog file now includes the summaries for all development
5066 - Check for addresses with invalid characters at the exit as well
5067 as at the client, and warn less verbosely when they fail. You can
5068 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
5069 - Adapt a patch from goodell to let the contrib/exitlist script
5070 take arguments rather than require direct editing.
5071 - Inform the server operator when we decide not to advertise a
5072 DirPort due to AccountingMax enabled or a low BandwidthRate. It
5073 was confusing Zax, so now we're hopefully more helpful.
5074 - Bring us one step closer to being able to establish an encrypted
5075 directory tunnel without knowing a descriptor first. Still not
5076 ready yet. As part of the change, now assume we can use a
5077 create_fast cell if we don't know anything about a router.
5078 - Allow exit nodes to use nameservers running on ports other than 53.
5079 - Servers now cache reverse DNS replies.
5080 - Add an --ignore-missing-torrc command-line option so that we can
5081 get the "use sensible defaults if the configuration file doesn't
5082 exist" behavior even when specifying a torrc location on the command
5085 o Minor features (controller):
5086 - Track reasons for OR connection failure; make these reasons
5087 available via the controller interface. (Patch from Mike Perry.)
5088 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
5089 can learn when clients are sending malformed hostnames to Tor.
5090 - Clean up documentation for controller status events.
5091 - Add a REMAP status to stream events to note that a stream's
5092 address has changed because of a cached address or a MapAddress
5096 Changes in version 0.1.2.6-alpha - 2007-01-09
5098 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
5099 connection handles more than 4 gigs in either direction, we crash.
5100 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
5101 advertised exit node, somebody might try to exit from us when
5102 we're bootstrapping and before we've built our descriptor yet.
5103 Refuse the connection rather than crashing.
5106 - Warn if we (as a server) find that we've resolved an address that we
5107 weren't planning to resolve.
5108 - Warn that using select() on any libevent version before 1.1 will be
5109 unnecessarily slow (even for select()).
5110 - Flush ERR-level controller status events just like we currently
5111 flush ERR-level log events, so that a Tor shutdown doesn't prevent
5112 the controller from learning about current events.
5114 o Minor features (more controller status events):
5115 - Implement EXTERNAL_ADDRESS server status event so controllers can
5116 learn when our address changes.
5117 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
5118 can learn when directories reject our descriptor.
5119 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
5120 can learn when a client application is speaking a non-socks protocol
5122 - Implement DANGEROUS_SOCKS client status event so controllers
5123 can learn when a client application is leaking DNS addresses.
5124 - Implement BUG general status event so controllers can learn when
5125 Tor is unhappy about its internal invariants.
5126 - Implement CLOCK_SKEW general status event so controllers can learn
5127 when Tor thinks the system clock is set incorrectly.
5128 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
5129 server status events so controllers can learn when their descriptors
5130 are accepted by a directory.
5131 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
5132 server status events so controllers can learn about Tor's progress in
5133 deciding whether it's reachable from the outside.
5134 - Implement BAD_LIBEVENT general status event so controllers can learn
5135 when we have a version/method combination in libevent that needs to
5137 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
5138 and DNS_USELESS server status events so controllers can learn
5139 about changes to DNS server status.
5141 o Minor features (directory):
5142 - Authorities no longer recommend exits as guards if this would shift
5143 too much load to the exit nodes.
5146 Changes in version 0.1.2.5-alpha - 2007-01-06
5148 - Enable write limiting as well as read limiting. Now we sacrifice
5149 capacity if we're pushing out lots of directory traffic, rather
5150 than overrunning the user's intended bandwidth limits.
5151 - Include TLS overhead when counting bandwidth usage; previously, we
5152 would count only the bytes sent over TLS, but not the bytes used
5154 - Support running the Tor service with a torrc not in the same
5155 directory as tor.exe and default to using the torrc located in
5156 the %appdata%\Tor\ of the user who installed the service. Patch
5158 - Servers now check for the case when common DNS requests are going to
5159 wildcarded addresses (i.e. all getting the same answer), and change
5160 their exit policy to reject *:* if it's happening.
5161 - Implement BEGIN_DIR cells, so we can connect to the directory
5162 server via TLS to do encrypted directory requests rather than
5163 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
5164 config options if you like.
5166 o Minor features (config and docs):
5167 - Start using the state file to store bandwidth accounting data:
5168 the bw_accounting file is now obsolete. We'll keep generating it
5169 for a while for people who are still using 0.1.2.4-alpha.
5170 - Try to batch changes to the state file so that we do as few
5171 disk writes as possible while still storing important things in
5173 - The state file and the bw_accounting file get saved less often when
5174 the AvoidDiskWrites config option is set.
5175 - Make PIDFile work on Windows (untested).
5176 - Add internal descriptions for a bunch of configuration options:
5177 accessible via controller interface and in comments in saved
5179 - Reject *:563 (NNTPS) in the default exit policy. We already reject
5180 NNTP by default, so this seems like a sensible addition.
5181 - Clients now reject hostnames with invalid characters. This should
5182 avoid some inadvertent info leaks. Add an option
5183 AllowNonRFC953Hostnames to disable this behavior, in case somebody
5184 is running a private network with hosts called @, !, and #.
5185 - Add a maintainer script to tell us which options are missing
5186 documentation: "make check-docs".
5187 - Add a new address-spec.txt document to describe our special-case
5188 addresses: .exit, .onion, and .noconnnect.
5190 o Minor features (DNS):
5191 - Ongoing work on eventdns infrastructure: now it has dns server
5192 and ipv6 support. One day Tor will make use of it.
5193 - Add client-side caching for reverse DNS lookups.
5194 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
5195 - When we change nameservers or IP addresses, reset and re-launch
5196 our tests for DNS hijacking.
5198 o Minor features (directory):
5199 - Authorities now specify server versions in networkstatus. This adds
5200 about 2% to the size of compressed networkstatus docs, and allows
5201 clients to tell which servers support BEGIN_DIR and which don't.
5202 The implementation is forward-compatible with a proposed future
5203 protocol version scheme not tied to Tor versions.
5204 - DirServer configuration lines now have an orport= option so
5205 clients can open encrypted tunnels to the authorities without
5206 having downloaded their descriptors yet. Enabled for moria1,
5207 moria2, tor26, and lefkada now in the default configuration.
5208 - Directory servers are more willing to send a 503 "busy" if they
5209 are near their write limit, especially for v1 directory requests.
5210 Now they can use their limited bandwidth for actual Tor traffic.
5211 - Clients track responses with status 503 from dirservers. After a
5212 dirserver has given us a 503, we try not to use it until an hour has
5213 gone by, or until we have no dirservers that haven't given us a 503.
5214 - When we get a 503 from a directory, and we're not a server, we don't
5215 count the failure against the total number of failures allowed
5216 for the thing we're trying to download.
5217 - Report X-Your-Address-Is correctly from tunneled directory
5218 connections; don't report X-Your-Address-Is when it's an internal
5219 address; and never believe reported remote addresses when they're
5221 - Protect against an unlikely DoS attack on directory servers.
5222 - Add a BadDirectory flag to network status docs so that authorities
5223 can (eventually) tell clients about caches they believe to be
5226 o Minor features (controller):
5227 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
5228 - Reimplement GETINFO so that info/names stays in sync with the
5230 - Implement "GETINFO fingerprint".
5231 - Implement "SETEVENTS GUARD" so controllers can get updates on
5232 entry guard status as it changes.
5234 o Minor features (clean up obsolete pieces):
5235 - Remove some options that have been deprecated since at least
5236 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
5237 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
5239 - We no longer look for identity and onion keys in "identity.key" and
5240 "onion.key" -- these were replaced by secret_id_key and
5241 secret_onion_key in 0.0.8pre1.
5242 - We no longer require unrecognized directory entries to be
5245 o Major bugfixes (security):
5246 - Stop sending the HttpProxyAuthenticator string to directory
5247 servers when directory connections are tunnelled through Tor.
5248 - Clients no longer store bandwidth history in the state file.
5249 - Do not log introduction points for hidden services if SafeLogging
5251 - When generating bandwidth history, round down to the nearest
5252 1k. When storing accounting data, round up to the nearest 1k.
5253 - When we're running as a server, remember when we last rotated onion
5254 keys, so that we will rotate keys once they're a week old even if
5255 we never stay up for a week ourselves.
5257 o Major bugfixes (other):
5258 - Fix a longstanding bug in eventdns that prevented the count of
5259 timed-out resolves from ever being reset. This bug caused us to
5260 give up on a nameserver the third time it timed out, and try it
5261 10 seconds later... and to give up on it every time it timed out
5263 - Take out the '5 second' timeout from the connection retry
5264 schedule. Now the first connect attempt will wait a full 10
5265 seconds before switching to a new circuit. Perhaps this will help
5266 a lot. Based on observations from Mike Perry.
5267 - Fix a bug on the Windows implementation of tor_mmap_file() that
5268 would prevent the cached-routers file from ever loading. Reported
5272 - Fix an assert failure when a directory authority sets
5273 AuthDirRejectUnlisted and then receives a descriptor from an
5274 unlisted router. Reported by seeess.
5275 - Avoid a double-free when parsing malformed DirServer lines.
5276 - Fix a bug when a BSD-style PF socket is first used. Patch from
5278 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
5279 to resolve an address at a given exit node even when they ask for
5281 - Servers no longer ever list themselves in their "family" line,
5282 even if configured to do so. This makes it easier to configure
5283 family lists conveniently.
5284 - When running as a server, don't fall back to 127.0.0.1 when no
5285 nameservers are configured in /etc/resolv.conf; instead, make the
5286 user fix resolv.conf or specify nameservers explicitly. (Resolves
5288 - Stop accepting certain malformed ports in configured exit policies.
5289 - Don't re-write the fingerprint file every restart, unless it has
5291 - Stop warning when a single nameserver fails: only warn when _all_ of
5292 our nameservers have failed. Also, when we only have one nameserver,
5293 raise the threshold for deciding that the nameserver is dead.
5294 - Directory authorities now only decide that routers are reachable
5295 if their identity keys are as expected.
5296 - When the user uses bad syntax in the Log config line, stop
5297 suggesting other bad syntax as a replacement.
5298 - Correctly detect ipv6 DNS capability on OpenBSD.
5300 o Minor bugfixes (controller):
5301 - Report the circuit number correctly in STREAM CLOSED events. Bug
5302 reported by Mike Perry.
5303 - Do not report bizarre values for results of accounting GETINFOs
5304 when the last second's write or read exceeds the allotted bandwidth.
5305 - Report "unrecognized key" rather than an empty string when the
5306 controller tries to fetch a networkstatus that doesn't exist.
5309 Changes in version 0.1.1.26 - 2006-12-14
5310 o Security bugfixes:
5311 - Stop sending the HttpProxyAuthenticator string to directory
5312 servers when directory connections are tunnelled through Tor.
5313 - Clients no longer store bandwidth history in the state file.
5314 - Do not log introduction points for hidden services if SafeLogging
5318 - Fix an assert failure when a directory authority sets
5319 AuthDirRejectUnlisted and then receives a descriptor from an
5320 unlisted router (reported by seeess).
5323 Changes in version 0.1.2.4-alpha - 2006-12-03
5325 - Add support for using natd; this allows FreeBSDs earlier than
5326 5.1.2 to have ipfw send connections through Tor without using
5327 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
5330 - Make all connections to addresses of the form ".noconnect"
5331 immediately get closed. This lets application/controller combos
5332 successfully test whether they're talking to the same Tor by
5333 watching for STREAM events.
5334 - Make cross.sh cross-compilation script work even when autogen.sh
5335 hasn't been run. (Patch from Michael Mohr.)
5336 - Statistics dumped by -USR2 now include a breakdown of public key
5337 operations, for profiling.
5340 - Fix a major leak when directory authorities parse their
5341 approved-routers list, a minor memory leak when we fail to pick
5342 an exit node, and a few rare leaks on errors.
5343 - Handle TransPort connections even when the server sends data before
5344 the client sends data. Previously, the connection would just hang
5345 until the client sent data. (Patch from tup based on patch from
5347 - Avoid assert failure when our cached-routers file is empty on
5351 - Don't log spurious warnings when we see a circuit close reason we
5352 don't recognize; it's probably just from a newer version of Tor.
5353 - Have directory authorities allow larger amounts of drift in uptime
5354 without replacing the server descriptor: previously, a server that
5355 restarted every 30 minutes could have 48 "interesting" descriptors
5357 - Start linking to the Tor specification and Tor reference manual
5358 correctly in the Windows installer.
5359 - Add Vidalia to the OS X uninstaller script, so when we uninstall
5360 Tor/Privoxy we also uninstall Vidalia.
5361 - Resume building on Irix64, and fix a lot of warnings from its
5363 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
5364 when we're running as a client.
5367 Changes in version 0.1.1.25 - 2006-11-04
5369 - When a client asks us to resolve (rather than connect to)
5370 an address, and we have a cached answer, give them the cached
5371 answer. Previously, we would give them no answer at all.
5372 - We were building exactly the wrong circuits when we predict
5373 hidden service requirements, meaning Tor would have to build all
5374 its circuits on demand.
5375 - If none of our live entry guards have a high uptime, but we
5376 require a guard with a high uptime, try adding a new guard before
5377 we give up on the requirement. This patch should make long-lived
5378 connections more stable on average.
5379 - When testing reachability of our DirPort, don't launch new
5380 tests when there's already one in progress -- unreachable
5381 servers were stacking up dozens of testing streams.
5383 o Security bugfixes:
5384 - When the user sends a NEWNYM signal, clear the client-side DNS
5385 cache too. Otherwise we continue to act on previous information.
5388 - Avoid a memory corruption bug when creating a hash table for
5390 - Avoid possibility of controller-triggered crash when misusing
5391 certain commands from a v0 controller on platforms that do not
5392 handle printf("%s",NULL) gracefully.
5393 - Avoid infinite loop on unexpected controller input.
5394 - Don't log spurious warnings when we see a circuit close reason we
5395 don't recognize; it's probably just from a newer version of Tor.
5396 - Add Vidalia to the OS X uninstaller script, so when we uninstall
5397 Tor/Privoxy we also uninstall Vidalia.
5400 Changes in version 0.1.2.3-alpha - 2006-10-29
5402 - Prepare for servers to publish descriptors less often: never
5403 discard a descriptor simply for being too old until either it is
5404 recommended by no authorities, or until we get a better one for
5405 the same router. Make caches consider retaining old recommended
5406 routers for even longer.
5407 - If most authorities set a BadExit flag for a server, clients
5408 don't think of it as a general-purpose exit. Clients only consider
5409 authorities that advertise themselves as listing bad exits.
5410 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
5411 headers for content, so that we can work better in the presence of
5412 caching HTTP proxies.
5413 - Allow authorities to list nodes as bad exits by fingerprint or by
5416 o Minor features, controller:
5417 - Add a REASON field to CIRC events; for backward compatibility, this
5418 field is sent only to controllers that have enabled the extended
5419 event format. Also, add additional reason codes to explain why
5420 a given circuit has been destroyed or truncated. (Patches from
5422 - Add a REMOTE_REASON field to extended CIRC events to tell the
5423 controller about why a remote OR told us to close a circuit.
5424 - Stream events also now have REASON and REMOTE_REASON fields,
5425 working much like those for circuit events.
5426 - There's now a GETINFO ns/... field so that controllers can ask Tor
5427 about the current status of a router.
5428 - A new event type "NS" to inform a controller when our opinion of
5429 a router's status has changed.
5430 - Add a GETINFO events/names and GETINFO features/names so controllers
5431 can tell which events and features are supported.
5432 - A new CLEARDNSCACHE signal to allow controllers to clear the
5433 client-side DNS cache without expiring circuits.
5435 o Security bugfixes:
5436 - When the user sends a NEWNYM signal, clear the client-side DNS
5437 cache too. Otherwise we continue to act on previous information.
5440 - Avoid sending junk to controllers or segfaulting when a controller
5441 uses EVENT_NEW_DESC with verbose nicknames.
5442 - Stop triggering asserts if the controller tries to extend hidden
5443 service circuits (reported by mwenge).
5444 - Avoid infinite loop on unexpected controller input.
5445 - When the controller does a "GETINFO network-status", tell it
5446 about even those routers whose descriptors are very old, and use
5447 long nicknames where appropriate.
5448 - Change NT service functions to be loaded on demand. This lets us
5449 build with MinGW without breaking Tor for Windows 98 users.
5450 - Do DirPort reachability tests less often, since a single test
5451 chews through many circuits before giving up.
5452 - In the hidden service example in torrc.sample, stop recommending
5453 esoteric and discouraged hidden service options.
5454 - When stopping an NT service, wait up to 10 sec for it to actually
5455 stop. (Patch from Matt Edman; resolves bug 295.)
5456 - Fix handling of verbose nicknames with ORCONN controller events:
5457 make them show up exactly when requested, rather than exactly when
5459 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
5460 printing a duplicate "$" in the keys we send (reported by mwenge).
5461 - Correctly set maximum connection limit on Cygwin. (This time
5463 - Try to detect Windows correctly when cross-compiling.
5464 - Detect the size of the routers file correctly even if it is
5465 corrupted (on systems without mmap) or not page-aligned (on systems
5466 with mmap). This bug was harmless.
5467 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
5468 to open a stream fails; now we do in more cases. This should
5469 make clients able to find a good exit faster in some cases, since
5470 unhandleable requests will now get an error rather than timing out.
5471 - Resolve two memory leaks when rebuilding the on-disk router cache
5472 (reported by fookoowa).
5473 - Clean up minor code warnings suggested by the MIPSpro C compiler,
5474 and reported by some Centos users.
5475 - Controller signals now work on non-Unix platforms that don't define
5476 SIGUSR1 and SIGUSR2 the way we expect.
5477 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
5478 values before failing, and always enables eventdns.
5479 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
5480 Try to fix this in configure.in by checking for most functions
5481 before we check for libevent.
5484 Changes in version 0.1.2.2-alpha - 2006-10-07
5486 - Make our async eventdns library on-by-default for Tor servers,
5487 and plan to deprecate the separate dnsworker threads.
5488 - Add server-side support for "reverse" DNS lookups (using PTR
5489 records so clients can determine the canonical hostname for a given
5490 IPv4 address). Only supported by servers using eventdns; servers
5491 now announce in their descriptors whether they support eventdns.
5492 - Specify and implement client-side SOCKS5 interface for reverse DNS
5493 lookups (see doc/socks-extensions.txt).
5494 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
5495 connect to directory servers through Tor. Previously, clients needed
5496 to find Tor exits to make private connections to directory servers.
5497 - Avoid choosing Exit nodes for entry or middle hops when the
5498 total bandwidth available from non-Exit nodes is much higher than
5499 the total bandwidth available from Exit nodes.
5500 - Workaround for name servers (like Earthlink's) that hijack failing
5501 DNS requests and replace the no-such-server answer with a "helpful"
5502 redirect to an advertising-driven search portal. Also work around
5503 DNS hijackers who "helpfully" decline to hijack known-invalid
5504 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
5505 lets you turn it off.
5506 - Send out a burst of long-range padding cells once we've established
5507 that we're reachable. Spread them over 4 circuits, so hopefully
5508 a few will be fast. This exercises our bandwidth and bootstraps
5509 us into the directory more quickly.
5511 o New/improved config options:
5512 - Add new config option "ResolvConf" to let the server operator
5513 choose an alternate resolve.conf file when using eventdns.
5514 - Add an "EnforceDistinctSubnets" option to control our "exclude
5515 servers on the same /16" behavior. It's still on by default; this
5516 is mostly for people who want to operate private test networks with
5517 all the machines on the same subnet.
5518 - If one of our entry guards is on the ExcludeNodes list, or the
5519 directory authorities don't think it's a good guard, treat it as
5520 if it were unlisted: stop using it as a guard, and throw it off
5521 the guards list if it stays that way for a long time.
5522 - Allow directory authorities to be marked separately as authorities
5523 for the v1 directory protocol, the v2 directory protocol, and
5524 as hidden service directories, to make it easier to retire old
5525 authorities. V1 authorities should set "HSAuthoritativeDir 1"
5526 to continue being hidden service authorities too.
5527 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
5529 o Minor features, controller:
5530 - Fix CIRC controller events so that controllers can learn the
5531 identity digests of non-Named servers used in circuit paths.
5532 - Let controllers ask for more useful identifiers for servers. Instead
5533 of learning identity digests for un-Named servers and nicknames
5534 for Named servers, the new identifiers include digest, nickname,
5535 and indication of Named status. Off by default; see control-spec.txt
5536 for more information.
5537 - Add a "getinfo address" controller command so it can display Tor's
5538 best guess to the user.
5539 - New controller event to alert the controller when our server
5540 descriptor has changed.
5541 - Give more meaningful errors on controller authentication failure.
5543 o Minor features, other:
5544 - When asked to resolve a hostname, don't use non-exit servers unless
5545 requested to do so. This allows servers with broken DNS to be
5546 useful to the network.
5547 - Divide eventdns log messages into warn and info messages.
5548 - Reserve the nickname "Unnamed" for routers that can't pick
5549 a hostname: any router can call itself Unnamed; directory
5550 authorities will never allocate Unnamed to any particular router;
5551 clients won't believe that any router is the canonical Unnamed.
5552 - Only include function names in log messages for info/debug messages.
5553 For notice/warn/err, the content of the message should be clear on
5554 its own, and printing the function name only confuses users.
5555 - Avoid some false positives during reachability testing: don't try
5556 to test via a server that's on the same /24 as us.
5557 - If we fail to build a circuit to an intended enclave, and it's
5558 not mandatory that we use that enclave, stop wanting it.
5559 - When eventdns is enabled, allow multithreaded builds on NetBSD and
5560 OpenBSD. (We had previously disabled threads on these platforms
5561 because they didn't have working thread-safe resolver functions.)
5563 o Major bugfixes, anonymity/security:
5564 - If a client asked for a server by name, and there's a named server
5565 in our network-status but we don't have its descriptor yet, we
5566 could return an unnamed server instead.
5567 - Fix NetBSD bug that could allow someone to force uninitialized RAM
5568 to be sent to a server's DNS resolver. This only affects NetBSD
5569 and other platforms that do not bounds-check tolower().
5570 - Reject (most) attempts to use Tor circuits with length one. (If
5571 many people start using Tor as a one-hop proxy, exit nodes become
5572 a more attractive target for compromise.)
5573 - Just because your DirPort is open doesn't mean people should be
5574 able to remotely teach you about hidden service descriptors. Now
5575 only accept rendezvous posts if you've got HSAuthoritativeDir set.
5577 o Major bugfixes, other:
5578 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
5579 - When a client asks the server to resolve (not connect to)
5580 an address, and it has a cached answer, give them the cached answer.
5581 Previously, the server would give them no answer at all.
5582 - Allow really slow clients to not hang up five minutes into their
5583 directory downloads (suggested by Adam J. Richter).
5584 - We were building exactly the wrong circuits when we anticipated
5585 hidden service requirements, meaning Tor would have to build all
5586 its circuits on demand.
5587 - Avoid crashing when we mmap a router cache file of size 0.
5588 - When testing reachability of our DirPort, don't launch new
5589 tests when there's already one in progress -- unreachable
5590 servers were stacking up dozens of testing streams.
5592 o Minor bugfixes, correctness:
5593 - If we're a directory mirror and we ask for "all" network status
5594 documents, we would discard status documents from authorities
5596 - Avoid a memory corruption bug when creating a hash table for
5598 - Avoid controller-triggered crash when misusing certain commands
5599 from a v0 controller on platforms that do not handle
5600 printf("%s",NULL) gracefully.
5601 - Don't crash when a controller sends a third argument to an
5602 "extendcircuit" request.
5603 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
5604 response; fix error code when "getinfo dir/status/" fails.
5605 - Avoid crash when telling controller stream-status and a stream
5607 - Patch from Adam Langley to fix assert() in eventdns.c.
5608 - Fix a debug log message in eventdns to say "X resolved to Y"
5609 instead of "X resolved to X".
5610 - Make eventdns give strings for DNS errors, not just error numbers.
5611 - Track unreachable entry guards correctly: don't conflate
5612 'unreachable by us right now' with 'listed as down by the directory
5613 authorities'. With the old code, if a guard was unreachable by
5614 us but listed as running, it would clog our guard list forever.
5615 - Behave correctly in case we ever have a network with more than
5616 2GB/s total advertised capacity.
5617 - Make TrackExitHosts case-insensitive, and fix the behavior of
5618 ".suffix" TrackExitHosts items to avoid matching in the middle of
5620 - Finally fix the openssl warnings from newer gccs that believe that
5621 ignoring a return value is okay, but casting a return value and
5622 then ignoring it is a sign of madness.
5623 - Prevent the contrib/exitlist script from printing the same
5624 result more than once.
5625 - Patch from Steve Hildrey: Generate network status correctly on
5626 non-versioning dirservers.
5627 - Don't listen to the X-Your-Address-Is hint if you did the lookup
5628 via Tor; otherwise you'll think you're the exit node's IP address.
5630 o Minor bugfixes, performance:
5631 - Two small performance improvements on parsing descriptors.
5632 - Major performance improvement on inserting descriptors: change
5633 algorithm from O(n^2) to O(n).
5634 - Make the common memory allocation path faster on machines where
5635 malloc(0) returns a pointer.
5636 - Start remembering X-Your-Address-Is directory hints even if you're
5637 a client, so you can become a server more smoothly.
5638 - Avoid duplicate entries on MyFamily line in server descriptor.
5640 o Packaging, features:
5641 - Remove architecture from OS X builds. The official builds are
5642 now universal binaries.
5643 - The Debian package now uses --verify-config when (re)starting,
5644 to distinguish configuration errors from other errors.
5645 - Update RPMs to require libevent 1.1b.
5647 o Packaging, bugfixes:
5648 - Patches so Tor builds with MinGW on Windows.
5649 - Patches so Tor might run on Cygwin again.
5650 - Resume building on non-gcc compilers and ancient gcc. Resume
5651 building with the -O0 compile flag. Resume building cleanly on
5653 - Run correctly on OS X platforms with case-sensitive filesystems.
5654 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
5655 - Add autoconf checks so Tor can build on Solaris x86 again.
5658 - Documented (and renamed) ServerDNSSearchDomains and
5659 ServerDNSResolvConfFile options.
5660 - Be clearer that the *ListenAddress directives can be repeated
5664 Changes in version 0.1.1.24 - 2006-09-29
5666 - Allow really slow clients to not hang up five minutes into their
5667 directory downloads (suggested by Adam J. Richter).
5668 - Fix major performance regression from 0.1.0.x: instead of checking
5669 whether we have enough directory information every time we want to
5670 do something, only check when the directory information has changed.
5671 This should improve client CPU usage by 25-50%.
5672 - Don't crash if, after a server has been running for a while,
5673 it can't resolve its hostname.
5676 - Allow Tor to start when RunAsDaemon is set but no logs are set.
5677 - Don't crash when the controller receives a third argument to an
5678 "extendcircuit" request.
5679 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
5680 response; fix error code when "getinfo dir/status/" fails.
5681 - Fix configure.in to not produce broken configure files with
5682 more recent versions of autoconf. Thanks to Clint for his auto*
5684 - Fix security bug on NetBSD that could allow someone to force
5685 uninitialized RAM to be sent to a server's DNS resolver. This
5686 only affects NetBSD and other platforms that do not bounds-check
5688 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
5689 methods: these are known to be buggy.
5690 - If we're a directory mirror and we ask for "all" network status
5691 documents, we would discard status documents from authorities
5695 Changes in version 0.1.2.1-alpha - 2006-08-27
5697 - Add "eventdns" async dns library from Adam Langley, tweaked to
5698 build on OSX and Windows. Only enabled if you pass the
5699 --enable-eventdns argument to configure.
5700 - Allow servers with no hostname or IP address to learn their
5701 IP address by asking the directory authorities. This code only
5702 kicks in when you would normally have exited with a "no address"
5703 error. Nothing's authenticated, so use with care.
5704 - Rather than waiting a fixed amount of time between retrying
5705 application connections, we wait only 5 seconds for the first,
5706 10 seconds for the second, and 15 seconds for each retry after
5707 that. Hopefully this will improve the expected user experience.
5708 - Patch from Tup to add support for transparent AP connections:
5709 this basically bundles the functionality of trans-proxy-tor
5710 into the Tor mainline. Now hosts with compliant pf/netfilter
5711 implementations can redirect TCP connections straight to Tor
5712 without diverting through SOCKS. Needs docs.
5713 - Busy directory servers save lots of memory by spooling server
5714 descriptors, v1 directories, and v2 networkstatus docs to buffers
5715 as needed rather than en masse. Also mmap the cached-routers
5716 files, so we don't need to keep the whole thing in memory too.
5717 - Automatically avoid picking more than one node from the same
5718 /16 network when constructing a circuit.
5719 - Revise and clean up the torrc.sample that we ship with; add
5720 a section for BandwidthRate and BandwidthBurst.
5723 - Split circuit_t into origin_circuit_t and or_circuit_t, and
5724 split connection_t into edge, or, dir, control, and base structs.
5725 These will save quite a bit of memory on busy servers, and they'll
5726 also help us track down bugs in the code and bugs in the spec.
5727 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
5728 or later. Log when we are doing this, so we can diagnose it when
5729 it fails. (Also, recommend libevent 1.1b for kqueue and
5730 win32 methods; deprecate libevent 1.0b harder; make libevent
5731 recommendation system saner.)
5732 - Start being able to build universal binaries on OS X (thanks
5734 - Export the default exit policy via the control port, so controllers
5735 don't need to guess what it is / will be later.
5736 - Add a man page entry for ProtocolWarnings.
5737 - Add TestVia config option to the man page.
5738 - Remove even more protocol-related warnings from Tor server logs,
5739 such as bad TLS handshakes and malformed begin cells.
5740 - Stop fetching descriptors if you're not a dir mirror and you
5741 haven't tried to establish any circuits lately. [This currently
5742 causes some dangerous behavior, because when you start up again
5743 you'll use your ancient server descriptors.]
5744 - New DirPort behavior: if you have your dirport set, you download
5745 descriptors aggressively like a directory mirror, whether or not
5747 - Get rid of the router_retry_connections notion. Now routers
5748 no longer try to rebuild long-term connections to directory
5749 authorities, and directory authorities no longer try to rebuild
5750 long-term connections to all servers. We still don't hang up
5751 connections in these two cases though -- we need to look at it
5752 more carefully to avoid flapping, and we likely need to wait til
5753 0.1.1.x is obsolete.
5754 - Drop compatibility with obsolete Tors that permit create cells
5755 to have the wrong circ_id_type.
5756 - Re-enable per-connection rate limiting. Get rid of the "OP
5757 bandwidth" concept. Lay groundwork for "bandwidth classes" --
5758 separate global buckets that apply depending on what sort of conn
5760 - Start publishing one minute or so after we find our ORPort
5761 to be reachable. This will help reduce the number of descriptors
5762 we have for ourselves floating around, since it's quite likely
5763 other things (e.g. DirPort) will change during that minute too.
5764 - Fork the v1 directory protocol into its own spec document,
5765 and mark dir-spec.txt as the currently correct (v2) spec.
5768 - When we find our DirPort to be reachable, publish a new descriptor
5769 so we'll tell the world (reported by pnx).
5770 - Publish a new descriptor after we hup/reload. This is important
5771 if our config has changed such that we'll want to start advertising
5772 our DirPort now, etc.
5773 - Allow Tor to start when RunAsDaemon is set but no logs are set.
5774 - When we have a state file we cannot parse, tell the user and
5775 move it aside. Now we avoid situations where the user starts
5776 Tor in 1904, Tor writes a state file with that timestamp in it,
5777 the user fixes her clock, and Tor refuses to start.
5778 - Fix configure.in to not produce broken configure files with
5779 more recent versions of autoconf. Thanks to Clint for his auto*
5781 - "tor --verify-config" now exits with -1(255) or 0 depending on
5782 whether the config options are bad or good.
5783 - Resolve bug 321 when using dnsworkers: append a period to every
5784 address we resolve at the exit node, so that we do not accidentally
5785 pick up local addresses, and so that failing searches are retried
5786 in the resolver search domains. (This is already solved for
5787 eventdns.) (This breaks Blossom servers for now.)
5788 - If we are using an exit enclave and we can't connect, e.g. because
5789 its webserver is misconfigured to not listen on localhost, then
5790 back off and try connecting from somewhere else before we fail.
5793 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
5794 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
5795 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
5796 when the IP address is mapped through MapAddress to a hostname.
5797 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
5798 useless IPv6 DNS resolves.
5799 - Patch suggested by Karsten Loesing: respond to SIGNAL command
5800 before we execute the signal, in case the signal shuts us down.
5801 - Clean up AllowInvalidNodes man page entry.
5802 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
5803 - Add more asserts to track down an assert error on a windows Tor
5804 server with connection_add being called with socket == -1.
5805 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
5806 - Fix misleading log messages: an entry guard that is "unlisted",
5807 as well as not known to be "down" (because we've never heard
5808 of it), is not therefore "up".
5809 - Remove code to special-case "-cvs" ending, since it has not
5810 actually mattered since 0.0.9.
5811 - Make our socks5 handling more robust to broken socks clients:
5812 throw out everything waiting on the buffer in between socks
5813 handshake phases, since they can't possibly (so the theory
5814 goes) have predicted what we plan to respond to them.
5817 Changes in version 0.1.1.23 - 2006-07-30
5819 - Fast Tor servers, especially exit nodes, were triggering asserts
5820 due to a bug in handling the list of pending DNS resolves. Some
5821 bugs still remain here; we're hunting them.
5822 - Entry guards could crash clients by sending unexpected input.
5823 - More fixes on reachability testing: if you find yourself reachable,
5824 then don't ever make any client requests (so you stop predicting
5825 circuits), then hup or have your clock jump, then later your IP
5826 changes, you won't think circuits are working, so you won't try to
5827 test reachability, so you won't publish.
5830 - Avoid a crash if the controller does a resetconf firewallports
5831 and then a setconf fascistfirewall=1.
5832 - Avoid an integer underflow when the dir authority decides whether
5833 a router is stable: we might wrongly label it stable, and compute
5834 a slightly wrong median stability, when a descriptor is published
5836 - Fix a place where we might trigger an assert if we can't build our
5837 own server descriptor yet.
5840 Changes in version 0.1.1.22 - 2006-07-05
5842 - Fix a big bug that was causing servers to not find themselves
5843 reachable if they changed IP addresses. Since only 0.1.1.22+
5844 servers can do reachability testing correctly, now we automatically
5845 make sure to test via one of these.
5846 - Fix to allow clients and mirrors to learn directory info from
5847 descriptor downloads that get cut off partway through.
5848 - Directory authorities had a bug in deciding if a newly published
5849 descriptor was novel enough to make everybody want a copy -- a few
5850 servers seem to be publishing new descriptors many times a minute.
5852 - Fix a rare bug that was causing some servers to complain about
5853 "closing wedged cpuworkers" and skip some circuit create requests.
5854 - Make the Exit flag in directory status documents actually work.
5857 Changes in version 0.1.1.21 - 2006-06-10
5858 o Crash and assert fixes from 0.1.1.20:
5859 - Fix a rare crash on Tor servers that have enabled hibernation.
5860 - Fix a seg fault on startup for Tor networks that use only one
5861 directory authority.
5862 - Fix an assert from a race condition that occurs on Tor servers
5863 while exiting, where various threads are trying to log that they're
5864 exiting, and delete the logs, at the same time.
5865 - Make our unit tests pass again on certain obscure platforms.
5868 - Add support for building SUSE RPM packages.
5869 - Speed up initial bootstrapping for clients: if we are making our
5870 first ever connection to any entry guard, then don't mark it down
5872 - When only one Tor server in the network is labelled as a guard,
5873 and we've already picked him, we would cycle endlessly picking him
5874 again, being unhappy about it, etc. Now we specifically exclude
5875 current guards when picking a new guard.
5876 - Servers send create cells more reliably after the TLS connection
5877 is established: we were sometimes forgetting to send half of them
5878 when we had more than one pending.
5879 - If we get a create cell that asks us to extend somewhere, but the
5880 Tor server there doesn't match the expected digest, we now send
5881 a destroy cell back, rather than silently doing nothing.
5882 - Make options->RedirectExit work again.
5883 - Make cookie authentication for the controller work again.
5884 - Stop being picky about unusual characters in the arguments to
5885 mapaddress. It's none of our business.
5886 - Add a new config option "TestVia" that lets you specify preferred
5887 middle hops to use for test circuits. Perhaps this will let me
5888 debug the reachability problems better.
5890 o Log / documentation fixes:
5891 - If we're a server and some peer has a broken TLS certificate, don't
5892 log about it unless ProtocolWarnings is set, i.e., we want to hear
5893 about protocol violations by others.
5894 - Fix spelling of VirtualAddrNetwork in man page.
5895 - Add a better explanation at the top of the autogenerated torrc file
5896 about what happened to our old torrc.
5899 Changes in version 0.1.1.20 - 2006-05-23
5901 - Downgrade a log severity where servers complain that they're
5903 - Avoid a compile warning on FreeBSD.
5904 - Remove string size limit on NEWDESC messages; solve bug 291.
5905 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
5906 more thoroughly when we're running on windows.
5909 Changes in version 0.1.1.19-rc - 2006-05-03
5911 - Regenerate our local descriptor if it's dirty and we try to use
5912 it locally (e.g. if it changes during reachability detection).
5913 - If we setconf our ORPort to 0, we continued to listen on the
5914 old ORPort and receive connections.
5915 - Avoid a second warning about machine/limits.h on Debian
5917 - Be willing to add our own routerinfo into the routerlist.
5918 Now authorities will include themselves in their directories
5919 and network-statuses.
5920 - Stop trying to upload rendezvous descriptors to every
5921 directory authority: only try the v1 authorities.
5922 - Servers no longer complain when they think they're not
5923 registered with the directory authorities. There were too many
5925 - Backport dist-rpm changes so rpms can be built without errors.
5928 - Implement an option, VirtualAddrMask, to set which addresses
5929 get handed out in response to mapaddress requests. This works
5930 around a bug in tsocks where 127.0.0.0/8 is never socksified.
5933 Changes in version 0.1.1.18-rc - 2006-04-10
5935 - Work harder to download live network-statuses from all the
5936 directory authorities we know about. Improve the threshold
5937 decision logic so we're more robust to edge cases.
5938 - When fetching rendezvous descriptors, we were willing to ask
5939 v2 authorities too, which would always return 404.
5942 - Stop listing down or invalid nodes in the v1 directory. This will
5943 reduce its bulk by about 1/3, and reduce load on directory
5945 - When deciding whether a router is Fast or Guard-worthy, consider
5946 his advertised BandwidthRate and not just the BandwidthCapacity.
5947 - No longer ship INSTALL and README files -- they are useless now.
5948 - Force rpmbuild to behave and honor target_cpu.
5949 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
5950 - Start to include translated versions of the tor-doc-*.html
5951 files, along with the screenshots. Still needs more work.
5952 - Start sending back 512 and 451 errors if mapaddress fails,
5953 rather than not sending anything back at all.
5954 - When we fail to bind or listen on an incoming or outgoing
5955 socket, we should close it before failing. otherwise we just
5956 leak it. (thanks to weasel for finding.)
5957 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
5958 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
5959 - Make NoPublish (even though deprecated) work again.
5960 - Fix a minor security flaw where a versioning auth dirserver
5961 could list a recommended version many times in a row to make
5962 clients more convinced that it's recommended.
5963 - Fix crash bug if there are two unregistered servers running
5964 with the same nickname, one of them is down, and you ask for
5965 them by nickname in your EntryNodes or ExitNodes. Also, try
5966 to pick the one that's running rather than an arbitrary one.
5967 - Fix an infinite loop we could hit if we go offline for too long.
5968 - Complain when we hit WSAENOBUFS on recv() or write() too.
5969 Perhaps this will help us hunt the bug.
5970 - If you're not a versioning dirserver, don't put the string
5971 "client-versions \nserver-versions \n" in your network-status.
5972 - Lower the minimum required number of file descriptors to 1000,
5973 so we can have some overhead for Valgrind on Linux, where the
5974 default ulimit -n is 1024.
5977 - Add tor.dizum.com as the fifth authoritative directory server.
5978 - Add a new config option FetchUselessDescriptors, off by default,
5979 for when you plan to run "exitlist" on your client and you want
5980 to know about even the non-running descriptors.
5983 Changes in version 0.1.1.17-rc - 2006-03-28
5985 - Clients and servers since 0.1.1.10-alpha have been expiring
5986 connections whenever they are idle for 5 minutes and they *do*
5987 have circuits on them. Oops. With this new version, clients will
5988 discard their previous entry guard choices and avoid choosing
5989 entry guards running these flawed versions.
5990 - Fix memory leak when uncompressing concatenated zlib streams. This
5991 was causing substantial leaks over time on Tor servers.
5992 - The v1 directory was including servers as much as 48 hours old,
5993 because that's how the new routerlist->routers works. Now only
5994 include them if they're 20 hours old or less.
5997 - Resume building on irix64, netbsd 2.0, etc.
5998 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
6000 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
6001 and it is confusing some users.
6002 - Mirrors stop caching the v1 directory so often.
6003 - Make the max number of old descriptors that a cache will hold
6004 rise with the number of directory authorities, so we can scale.
6005 - Change our win32 uname() hack to be more forgiving about what
6006 win32 versions it thinks it's found.
6009 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
6011 - When the controller's *setconf commands fail, collect an error
6012 message in a string and hand it back to the controller.
6013 - Make the v2 dir's "Fast" flag based on relative capacity, just
6014 like "Stable" is based on median uptime. Name everything in the
6015 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
6016 - Log server fingerprint on startup, so new server operators don't
6017 have to go hunting around their filesystem for it.
6018 - Return a robots.txt on our dirport to discourage google indexing.
6019 - Let the controller ask for GETINFO dir/status/foo so it can ask
6020 directly rather than connecting to the dir port. Only works when
6021 dirport is set for now.
6023 o New config options rather than constants in the code:
6024 - SocksTimeout: How long do we let a socks connection wait
6025 unattached before we fail it?
6026 - CircuitBuildTimeout: Cull non-open circuits that were born
6027 at least this many seconds ago.
6028 - CircuitIdleTimeout: Cull open clean circuits that were born
6029 at least this many seconds ago.
6032 Changes in version 0.1.1.16-rc - 2006-03-18
6033 o Bugfixes on 0.1.1.15-rc:
6034 - Fix assert when the controller asks to attachstream a connect-wait
6035 or resolve-wait stream.
6036 - Now do address rewriting when the controller asks us to attach
6037 to a particular circuit too. This will let Blossom specify
6038 "moria2.exit" without having to learn what moria2's IP address is.
6039 - Make the "tor --verify-config" command-line work again, so people
6040 can automatically check if their torrc will parse.
6041 - Authoritative dirservers no longer require an open connection from
6042 a server to consider him "reachable". We need this change because
6043 when we add new auth dirservers, old servers won't know not to
6045 - Let Tor build on Sun CC again.
6046 - Fix an off-by-one buffer size in dirserv.c that magically never
6047 hit our three authorities but broke sjmurdoch's own tor network.
6048 - If we as a directory mirror don't know of any v1 directory
6049 authorities, then don't try to cache any v1 directories.
6050 - Stop warning about unknown servers in our family when they are
6051 given as hex digests.
6052 - Stop complaining as quickly to the server operator that he
6053 hasn't registered his nickname/key binding.
6054 - Various cleanups so we can add new V2 Auth Dirservers.
6055 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
6056 reflect the updated flags in our v2 dir protocol.
6057 - Resume allowing non-printable characters for exit streams (both
6058 for connecting and for resolving). Now we tolerate applications
6059 that don't follow the RFCs. But continue to block malformed names
6062 o Bugfixes on 0.1.0.x:
6063 - Fix assert bug in close_logs(): when we close and delete logs,
6064 remove them all from the global "logfiles" list.
6065 - Fix minor integer overflow in calculating when we expect to use up
6066 our bandwidth allocation before hibernating.
6067 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
6068 there are multiple SSLs installed with different versions.
6069 - When we try to be a server and Address is not explicitly set and
6070 our hostname resolves to a private IP address, try to use an
6071 interface address if it has a public address. Now Windows machines
6072 that think of themselves as localhost can work by default.
6075 - Let the controller ask for GETINFO dir/server/foo so it can ask
6076 directly rather than connecting to the dir port.
6077 - Let the controller tell us about certain router descriptors
6078 that it doesn't want Tor to use in circuits. Implement
6079 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
6080 - New config option SafeSocks to reject all application connections
6081 using unsafe socks protocols. Defaults to off.
6084 Changes in version 0.1.1.15-rc - 2006-03-11
6085 o Bugfixes and cleanups:
6086 - When we're printing strings from the network, don't try to print
6087 non-printable characters. This protects us against shell escape
6088 sequence exploits, and also against attacks to fool humans into
6089 misreading their logs.
6090 - Fix a bug where Tor would fail to establish any connections if you
6091 left it off for 24 hours and then started it: we were happy with
6092 the obsolete network statuses, but they all referred to router
6093 descriptors that were too old to fetch, so we ended up with no
6094 valid router descriptors.
6095 - Fix a seg fault in the controller's "getinfo orconn-status"
6096 command while listing status on incoming handshaking connections.
6097 Introduce a status name "NEW" for these connections.
6098 - If we get a linelist or linelist_s config option from the torrc
6099 (e.g. ExitPolicy) and it has no value, warn and skip rather than
6100 silently resetting it to its default.
6101 - Don't abandon entry guards until they've been down or gone for
6103 - Cleaner and quieter log messages.
6106 - New controller signal NEWNYM that makes new application requests
6108 - Add a new circuit purpose 'controller' to let the controller ask
6109 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
6110 controller command to let you specify the purpose if you're
6111 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
6112 command to let you change a circuit's purpose after it's been
6114 - Accept "private:*" in routerdesc exit policies; not generated yet
6115 because older Tors do not understand it.
6116 - Add BSD-style contributed startup script "rc.subr" from Peter
6120 Changes in version 0.1.1.14-alpha - 2006-02-20
6121 o Bugfixes on 0.1.1.x:
6122 - Don't die if we ask for a stdout or stderr log (even implicitly)
6123 and we're set to RunAsDaemon -- just warn.
6124 - We still had a few bugs in the OR connection rotation code that
6125 caused directory servers to slowly aggregate connections to other
6126 fast Tor servers. This time for sure!
6127 - Make log entries on Win32 include the name of the function again.
6128 - We were treating a pair of exit policies if they were equal even
6129 if one said accept and the other said reject -- causing us to
6130 not always publish a new descriptor since we thought nothing
6132 - Retry pending server downloads as well as pending networkstatus
6133 downloads when we unexpectedly get a socks request.
6134 - We were ignoring the IS_FAST flag in the directory status,
6135 meaning we were willing to pick trivial-bandwidth nodes for "fast"
6137 - If the controller's SAVECONF command fails (e.g. due to file
6138 permissions), let the controller know that it failed.
6141 - If we're trying to be a Tor server and running Windows 95/98/ME
6142 as a server, explain that we'll likely crash.
6143 - When we're a server, a client asks for an old-style directory,
6144 and our write bucket is empty, don't give it to him. This way
6145 small servers can continue to serve the directory *sometimes*,
6146 without getting overloaded.
6147 - Compress exit policies even more -- look for duplicate lines
6149 - Clients now honor the "guard" flag in the router status when
6150 picking entry guards, rather than looking at is_fast or is_stable.
6151 - Retain unrecognized lines in $DATADIR/state file, so that we can
6152 be forward-compatible.
6153 - Generate 18.0.0.0/8 address policy format in descs when we can;
6154 warn when the mask is not reducible to a bit-prefix.
6155 - Let the user set ControlListenAddress in the torrc. This can be
6156 dangerous, but there are some cases (like a secured LAN) where it
6158 - Split ReachableAddresses into ReachableDirAddresses and
6159 ReachableORAddresses, so we can restrict Dir conns to port 80
6160 and OR conns to port 443.
6161 - Now we can target arch and OS in rpm builds (contributed by
6162 Phobos). Also make the resulting dist-rpm filename match the
6164 - New config options to help controllers: FetchServerDescriptors
6165 and FetchHidServDescriptors for whether to fetch server
6166 info and hidserv info or let the controller do it, and
6167 PublishServerDescriptor and PublishHidServDescriptors.
6168 - Also let the controller set the __AllDirActionsPrivate config
6169 option if you want all directory fetches/publishes to happen via
6170 Tor (it assumes your controller bootstraps your circuits).
6173 Changes in version 0.1.0.17 - 2006-02-17
6174 o Crash bugfixes on 0.1.0.x:
6175 - When servers with a non-zero DirPort came out of hibernation,
6176 sometimes they would trigger an assert.
6178 o Other important bugfixes:
6179 - On platforms that don't have getrlimit (like Windows), we were
6180 artificially constraining ourselves to a max of 1024
6181 connections. Now just assume that we can handle as many as 15000
6182 connections. Hopefully this won't cause other problems.
6184 o Backported features:
6185 - When we're a server, a client asks for an old-style directory,
6186 and our write bucket is empty, don't give it to him. This way
6187 small servers can continue to serve the directory *sometimes*,
6188 without getting overloaded.
6189 - Whenever you get a 503 in response to a directory fetch, try
6190 once more. This will become important once servers start sending
6191 503's whenever they feel busy.
6192 - Fetch a new directory every 120 minutes, not every 40 minutes.
6193 Now that we have hundreds of thousands of users running the old
6194 directory algorithm, it's starting to hurt a lot.
6195 - Bump up the period for forcing a hidden service descriptor upload
6196 from 20 minutes to 1 hour.
6199 Changes in version 0.1.1.13-alpha - 2006-02-09
6200 o Crashes in 0.1.1.x:
6201 - When you tried to setconf ORPort via the controller, Tor would
6202 crash. So people using TorCP to become a server were sad.
6203 - Solve (I hope) the stack-smashing bug that we were seeing on fast
6204 servers. The problem appears to be something do with OpenSSL's
6205 random number generation, or how we call it, or something. Let me
6206 know if the crashes continue.
6207 - Turn crypto hardware acceleration off by default, until we find
6208 somebody smart who can test it for us. (It appears to produce
6209 seg faults in at least some cases.)
6210 - Fix a rare assert error when we've tried all intro points for
6211 a hidden service and we try fetching the service descriptor again:
6212 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
6215 - Fix a major load balance bug: we were round-robining in 16 KB
6216 chunks, and servers with bandwidthrate of 20 KB, while downloading
6217 a 600 KB directory, would starve their other connections. Now we
6218 try to be a bit more fair.
6219 - Dir authorities and mirrors were never expiring the newest
6220 descriptor for each server, causing memory and directory bloat.
6221 - Fix memory-bloating and connection-bloating bug on servers: We
6222 were never closing any connection that had ever had a circuit on
6223 it, because we were checking conn->n_circuits == 0, yet we had a
6224 bug that let it go negative.
6225 - Make Tor work using squid as your http proxy again -- squid
6226 returns an error if you ask for a URL that's too long, and it uses
6227 a really generic error message. Plus, many people are behind a
6228 transparent squid so they don't even realize it.
6229 - On platforms that don't have getrlimit (like Windows), we were
6230 artificially constraining ourselves to a max of 1024
6231 connections. Now just assume that we can handle as many as 15000
6232 connections. Hopefully this won't cause other problems.
6233 - Add a new config option ExitPolicyRejectPrivate which defaults to
6234 1. This means all exit policies will begin with rejecting private
6235 addresses, unless the server operator explicitly turns it off.
6238 - Clients no longer download descriptors for non-running
6240 - Before we add new directory authorities, we should make it
6241 clear that only v1 authorities should receive/publish hidden
6242 service descriptors.
6245 - As soon as we've fetched some more directory info, immediately
6246 try to download more server descriptors. This way we don't have
6247 a 10 second pause during initial bootstrapping.
6248 - Remove even more loud log messages that the server operator can't
6250 - When we're running an obsolete or un-recommended version, make
6251 the log message more clear about what the problem is and what
6252 versions *are* still recommended.
6253 - Provide a more useful warn message when our onion queue gets full:
6254 the CPU is too slow or the exit policy is too liberal.
6255 - Don't warn when we receive a 503 from a dirserver/cache -- this
6256 will pave the way for them being able to refuse if they're busy.
6257 - When we fail to bind a listener, try to provide a more useful
6258 log message: e.g., "Is Tor already running?"
6259 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
6260 Goldberg can prove things about our handshake protocol more
6262 - MaxConn has been obsolete for a while now. Document the ConnLimit
6263 config option, which is a *minimum* number of file descriptors
6264 that must be available else Tor refuses to start.
6265 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
6266 if you log to syslog and want something other than LOG_DAEMON.
6267 - Make dirservers generate a separate "guard" flag to mean,
6268 "would make a good entry guard". Make clients parse it and vote
6269 on it. Not used by clients yet.
6270 - Implement --with-libevent-dir option to ./configure. Also, improve
6271 search techniques to find libevent, and use those for openssl too.
6272 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
6273 - Only start testing reachability once we've established a
6274 circuit. This will make startup on dirservers less noisy.
6275 - Don't try to upload hidden service descriptors until we have
6276 established a circuit.
6277 - Fix the controller's "attachstream 0" command to treat conn like
6278 it just connected, doing address remapping, handling .exit and
6279 .onion idioms, and so on. Now we're more uniform in making sure
6280 that the controller hears about new and closing connections.
6283 Changes in version 0.1.1.12-alpha - 2006-01-11
6284 o Bugfixes on 0.1.1.x:
6285 - The fix to close duplicate server connections was closing all
6286 Tor client connections if they didn't establish a circuit
6287 quickly enough. Oops.
6288 - Fix minor memory issue (double-free) that happened on exit.
6290 o Bugfixes on 0.1.0.x:
6291 - Tor didn't warn when it failed to open a log file.
6294 Changes in version 0.1.1.11-alpha - 2006-01-10
6295 o Crashes in 0.1.1.x:
6296 - Include all the assert/crash fixes from 0.1.0.16.
6297 - If you start Tor and then quit very quickly, there were some
6298 races that tried to free things that weren't allocated yet.
6299 - Fix a rare memory stomp if you're running hidden services.
6300 - Fix segfault when specifying DirServer in config without nickname.
6301 - Fix a seg fault when you finish connecting to a server but at
6302 that moment you dump his server descriptor.
6303 - Extendcircuit and Attachstream controller commands would
6304 assert/crash if you don't give them enough arguments.
6305 - Fix an assert error when we're out of space in the connection_list
6306 and we try to post a hidden service descriptor (reported by weasel).
6307 - If you specify a relative torrc path and you set RunAsDaemon in
6308 your torrc, then it chdir()'s to the new directory. If you HUP,
6309 it tries to load the new torrc location, fails, and exits.
6310 The fix: no longer allow a relative path to torrc using -f.
6313 - Implement "entry guards": automatically choose a handful of entry
6314 nodes and stick with them for all circuits. Only pick new guards
6315 when the ones you have are unsuitable, and if the old guards
6316 become suitable again, switch back. This will increase security
6317 dramatically against certain end-point attacks. The EntryNodes
6318 config option now provides some hints about which entry guards you
6319 want to use most; and StrictEntryNodes means to only use those.
6320 - New directory logic: download by descriptor digest, not by
6321 fingerprint. Caches try to download all listed digests from
6322 authorities; clients try to download "best" digests from caches.
6323 This avoids partitioning and isolating attacks better.
6324 - Make the "stable" router flag in network-status be the median of
6325 the uptimes of running valid servers, and make clients pay
6326 attention to the network-status flags. Thus the cutoff adapts
6327 to the stability of the network as a whole, making IRC, IM, etc
6328 connections more reliable.
6331 - Tor servers with dynamic IP addresses were needing to wait 18
6332 hours before they could start doing reachability testing using
6333 the new IP address and ports. This is because they were using
6334 the internal descriptor to learn what to test, yet they were only
6335 rebuilding the descriptor once they decided they were reachable.
6336 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
6337 to download certain server descriptors, throw them away, and then
6338 fetch them again after 30 minutes. Now mirrors throw away these
6339 server descriptors so clients can't get them.
6340 - We were leaving duplicate connections to other ORs open for a week,
6341 rather than closing them once we detect a duplicate. This only
6342 really affected authdirservers, but it affected them a lot.
6343 - Spread the authdirservers' reachability testing over the entire
6344 testing interval, so we don't try to do 500 TLS's at once every
6348 - If the network is down, and we try to connect to a conn because
6349 we have a circuit in mind, and we timeout (30 seconds) because the
6350 network never answers, we were expiring the circuit, but we weren't
6351 obsoleting the connection or telling the entry_guards functions.
6352 - Some Tor servers process billions of cells per day. These statistics
6353 need to be uint64_t's.
6354 - Check for integer overflows in more places, when adding elements
6355 to smartlists. This could possibly prevent a buffer overflow
6356 on malicious huge inputs. I don't see any, but I haven't looked
6358 - ReachableAddresses kept growing new "reject *:*" lines on every
6360 - When you "setconf log" via the controller, it should remove all
6361 logs. We were automatically adding back in a "log notice stdout".
6362 - Newly bootstrapped Tor networks couldn't establish hidden service
6363 circuits until they had nodes with high uptime. Be more tolerant.
6364 - We were marking servers down when they could not answer every piece
6365 of the directory request we sent them. This was far too harsh.
6366 - Fix the torify (tsocks) config file to not use Tor for localhost
6368 - Directory authorities now go to the proper authority when asking for
6369 a networkstatus, even when they want a compressed one.
6370 - Fix a harmless bug that was causing Tor servers to log
6371 "Got an end because of misc error, but we're not an AP. Closing."
6372 - Authorities were treating their own descriptor changes as cosmetic,
6373 meaning the descriptor available in the network-status and the
6374 descriptor that clients downloaded were different.
6375 - The OS X installer was adding a symlink for tor_resolve but
6376 the binary was called tor-resolve (reported by Thomas Hardly).
6377 - Workaround a problem with some http proxies where they refuse GET
6378 requests that specify "Content-Length: 0" (reported by Adrian).
6379 - Fix wrong log message when you add a "HiddenServiceNodes" config
6380 line without any HiddenServiceDir line (reported by Chris Thomas).
6383 - Write the TorVersion into the state file so we have a prayer of
6384 keeping forward and backward compatibility.
6385 - Revive the FascistFirewall config option rather than eliminating it:
6386 now it's a synonym for ReachableAddresses *:80,*:443.
6387 - Clients choose directory servers from the network status lists,
6388 not from their internal list of router descriptors. Now they can
6389 go to caches directly rather than needing to go to authorities
6391 - Directory authorities ignore router descriptors that have only
6392 cosmetic differences: do this for 0.1.0.x servers now too.
6393 - Add a new flag to network-status indicating whether the server
6394 can answer v2 directory requests too.
6395 - Authdirs now stop whining so loudly about bad descriptors that
6396 they fetch from other dirservers. So when there's a log complaint,
6397 it's for sure from a freshly uploaded descriptor.
6398 - Reduce memory requirements in our structs by changing the order
6400 - There used to be two ways to specify your listening ports in a
6401 server descriptor: on the "router" line and with a separate "ports"
6402 line. Remove support for the "ports" line.
6403 - New config option "AuthDirRejectUnlisted" for auth dirservers as
6404 a panic button: if we get flooded with unusable servers we can
6405 revert to only listing servers in the approved-routers file.
6406 - Auth dir servers can now mark a fingerprint as "!reject" or
6407 "!invalid" in the approved-routers file (as its nickname), to
6408 refuse descriptors outright or include them but marked as invalid.
6409 - Servers store bandwidth history across restarts/crashes.
6410 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
6411 get a better idea of why their circuits failed. Not used yet.
6412 - Directory mirrors now cache up to 16 unrecognized network-status
6413 docs. Now we can add new authdirservers and they'll be cached too.
6414 - When picking a random directory, prefer non-authorities if any
6416 - New controller option "getinfo desc/all-recent" to fetch the
6417 latest server descriptor for every router that Tor knows about.
6420 Changes in version 0.1.0.16 - 2006-01-02
6421 o Crash bugfixes on 0.1.0.x:
6422 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
6423 corrupting the heap, losing FDs, or crashing when we need to resize
6424 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
6425 - It turns out sparc64 platforms crash on unaligned memory access
6426 too -- so detect and avoid this.
6427 - Handle truncated compressed data correctly (by detecting it and
6429 - Fix possible-but-unlikely free(NULL) in control.c.
6430 - When we were closing connections, there was a rare case that
6431 stomped on memory, triggering seg faults and asserts.
6432 - Avoid potential infinite recursion when building a descriptor. (We
6433 don't know that it ever happened, but better to fix it anyway.)
6434 - We were neglecting to unlink marked circuits from soon-to-close OR
6435 connections, which caused some rare scribbling on freed memory.
6436 - Fix a memory stomping race bug when closing the joining point of two
6437 rendezvous circuits.
6438 - Fix an assert in time parsing found by Steven Murdoch.
6440 o Other bugfixes on 0.1.0.x:
6441 - When we're doing reachability testing, provide more useful log
6442 messages so the operator knows what to expect.
6443 - Do not check whether DirPort is reachable when we are suppressing
6444 advertising it because of hibernation.
6445 - When building with -static or on Solaris, we sometimes needed -ldl.
6446 - When we're deciding whether a stream has enough circuits around
6447 that can handle it, count the freshly dirty ones and not the ones
6448 that are so dirty they won't be able to handle it.
6449 - When we're expiring old circuits, we had a logic error that caused
6450 us to close new rendezvous circuits rather than old ones.
6451 - Give a more helpful log message when you try to change ORPort via
6452 the controller: you should upgrade Tor if you want that to work.
6453 - We were failing to parse Tor versions that start with "Tor ".
6454 - Tolerate faulty streams better: when a stream fails for reason
6455 exitpolicy, stop assuming that the router is lying about his exit
6456 policy. When a stream fails for reason misc, allow it to retry just
6457 as if it was resolvefailed. When a stream has failed three times,
6458 reset its failure count so we can try again and get all three tries.
6461 Changes in version 0.1.1.10-alpha - 2005-12-11
6462 o Correctness bugfixes on 0.1.0.x:
6463 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
6464 corrupting the heap, losing FDs, or crashing when we need to resize
6465 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
6466 - Stop doing the complex voodoo overkill checking for insecure
6467 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
6468 - When we were closing connections, there was a rare case that
6469 stomped on memory, triggering seg faults and asserts.
6470 - We were neglecting to unlink marked circuits from soon-to-close OR
6471 connections, which caused some rare scribbling on freed memory.
6472 - When we're deciding whether a stream has enough circuits around
6473 that can handle it, count the freshly dirty ones and not the ones
6474 that are so dirty they won't be able to handle it.
6475 - Recover better from TCP connections to Tor servers that are
6476 broken but don't tell you (it happens!); and rotate TLS
6477 connections once a week.
6478 - When we're expiring old circuits, we had a logic error that caused
6479 us to close new rendezvous circuits rather than old ones.
6480 - Fix a scary-looking but apparently harmless bug where circuits
6481 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
6482 servers, and never switch to state CIRCUIT_STATE_OPEN.
6483 - When building with -static or on Solaris, we sometimes needed to
6485 - Give a useful message when people run Tor as the wrong user,
6486 rather than telling them to start chowning random directories.
6487 - We were failing to inform the controller about new .onion streams.
6489 o Security bugfixes on 0.1.0.x:
6490 - Refuse server descriptors if the fingerprint line doesn't match
6491 the included identity key. Tor doesn't care, but other apps (and
6492 humans) might actually be trusting the fingerprint line.
6493 - We used to kill the circuit when we receive a relay command we
6494 don't recognize. Now we just drop it.
6495 - Start obeying our firewall options more rigorously:
6496 . If we can't get to a dirserver directly, try going via Tor.
6497 . Don't ever try to connect (as a client) to a place our
6498 firewall options forbid.
6499 . If we specify a proxy and also firewall options, obey the
6500 firewall options even when we're using the proxy: some proxies
6501 can only proxy to certain destinations.
6502 - Fix a bug found by Lasse Overlier: when we were making internal
6503 circuits (intended to be cannibalized later for rendezvous and
6504 introduction circuits), we were picking them so that they had
6505 useful exit nodes. There was no need for this, and it actually
6506 aids some statistical attacks.
6507 - Start treating internal circuits and exit circuits separately.
6508 It's important to keep them separate because internal circuits
6509 have their last hops picked like middle hops, rather than like
6510 exit hops. So exiting on them will break the user's expectations.
6512 o Bugfixes on 0.1.1.x:
6513 - Take out the mis-feature where we tried to detect IP address
6514 flapping for people with DynDNS, and chose not to upload a new
6515 server descriptor sometimes.
6516 - Try to be compatible with OpenSSL 0.9.6 again.
6517 - Log fix: when the controller is logging about .onion addresses,
6518 sometimes it didn't include the ".onion" part of the address.
6519 - Don't try to modify options->DirServers internally -- if the
6520 user didn't specify any, just add the default ones directly to
6521 the trusted dirserver list. This fixes a bug where people running
6522 controllers would use SETCONF on some totally unrelated config
6523 option, and Tor would start yelling at them about changing their
6525 - Let the controller's redirectstream command specify a port, in
6526 case the controller wants to change that too.
6527 - When we requested a pile of server descriptors, we sometimes
6528 accidentally launched a duplicate request for the first one.
6529 - Bugfix for trackhostexits: write down the fingerprint of the
6530 chosen exit, not its nickname, because the chosen exit might not
6532 - When parsing foo.exit, if foo is unknown, and we are leaving
6533 circuits unattached, set the chosen_exit field and leave the
6534 address empty. This matters because controllers got confused
6536 - Directory authorities no longer try to download server
6537 descriptors that they know they will reject.
6539 o Features and updates:
6540 - Replace balanced trees with hash tables: this should make stuff
6541 significantly faster.
6542 - Resume using the AES counter-mode implementation that we ship,
6543 rather than OpenSSL's. Ours is significantly faster.
6544 - Many other CPU and memory improvements.
6545 - Add a new config option FastFirstHopPK (on by default) so clients
6546 do a trivial crypto handshake for their first hop, since TLS has
6547 already taken care of confidentiality and authentication.
6548 - Add a new config option TestSocks so people can see if their
6549 applications are using socks4, socks4a, socks5-with-ip, or
6550 socks5-with-hostname. This way they don't have to keep mucking
6551 with tcpdump and wondering if something got cached somewhere.
6552 - Warn when listening on a public address for socks. I suspect a
6553 lot of people are setting themselves up as open socks proxies,
6554 and they have no idea that jerks on the Internet are using them,
6555 since they simply proxy the traffic into the Tor network.
6556 - Add "private:*" as an alias in configuration for policies. Now
6557 you can simplify your exit policy rather than needing to list
6558 every single internal or nonroutable network space.
6559 - Add a new controller event type that allows controllers to get
6560 all server descriptors that were uploaded to a router in its role
6561 as authoritative dirserver.
6562 - Start shipping socks-extensions.txt, tor-doc-unix.html,
6563 tor-doc-server.html, and stylesheet.css in the tarball.
6564 - Stop shipping tor-doc.html in the tarball.
6567 Changes in version 0.1.1.9-alpha - 2005-11-15
6568 o Usability improvements:
6569 - Start calling it FooListenAddress rather than FooBindAddress,
6570 since few of our users know what it means to bind an address
6572 - Reduce clutter in server logs. We're going to try to make
6573 them actually usable now. New config option ProtocolWarnings that
6574 lets you hear about how _other Tors_ are breaking the protocol. Off
6576 - Divide log messages into logging domains. Once we put some sort
6577 of interface on this, it will let people looking at more verbose
6578 log levels specify the topics they want to hear more about.
6579 - Make directory servers return better http 404 error messages
6580 instead of a generic "Servers unavailable".
6581 - Check for even more Windows version flags when writing the platform
6582 string in server descriptors, and note any we don't recognize.
6583 - Clean up more of the OpenSSL memory when exiting, so we can detect
6584 memory leaks better.
6585 - Make directory authorities be non-versioning, non-naming by
6586 default. Now we can add new directory servers without requiring
6587 their operators to pay close attention.
6588 - When logging via syslog, include the pid whenever we provide
6589 a log entry. Suggested by Todd Fries.
6591 o Performance improvements:
6592 - Directory servers now silently throw away new descriptors that
6593 haven't changed much if the timestamps are similar. We do this to
6594 tolerate older Tor servers that upload a new descriptor every 15
6595 minutes. (It seemed like a good idea at the time.)
6596 - Inline bottleneck smartlist functions; use fast versions by default.
6597 - Add a "Map from digest to void*" abstraction digestmap_t so we
6598 can do less hex encoding/decoding. Use it in router_get_by_digest()
6599 to resolve a performance bottleneck.
6600 - Allow tor_gzip_uncompress to extract as much as possible from
6601 truncated compressed data. Try to extract as many
6602 descriptors as possible from truncated http responses (when
6603 DIR_PURPOSE_FETCH_ROUTERDESC).
6604 - Make circ->onionskin a pointer, not a static array. moria2 was using
6605 125000 circuit_t's after it had been up for a few weeks, which
6606 translates to 20+ megs of wasted space.
6607 - The private half of our EDH handshake keys are now chosen out
6608 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
6610 o Security improvements:
6611 - Start making directory caches retain old routerinfos, so soon
6612 clients can start asking by digest of descriptor rather than by
6613 fingerprint of server.
6614 - Add half our entropy from RAND_poll in OpenSSL. This knows how
6615 to use egd (if present), openbsd weirdness (if present), vms/os2
6616 weirdness (if we ever port there), and more in the future.
6618 o Bugfixes on 0.1.0.x:
6619 - Do round-robin writes of at most 16 kB per write. This might be
6620 more fair on loaded Tor servers, and it might resolve our Windows
6621 crash bug. It might also slow things down.
6622 - Our TLS handshakes were generating a single public/private
6623 keypair for the TLS context, rather than making a new one for
6624 each new connections. Oops. (But we were still rotating them
6625 periodically, so it's not so bad.)
6626 - When we were cannibalizing a circuit with a particular exit
6627 node in mind, we weren't checking to see if that exit node was
6628 already present earlier in the circuit. Oops.
6629 - When a Tor server's IP changes (e.g. from a dyndns address),
6630 upload a new descriptor so clients will learn too.
6631 - Really busy servers were keeping enough circuits open on stable
6632 connections that they were wrapping around the circuit_id
6633 space. (It's only two bytes.) This exposed a bug where we would
6634 feel free to reuse a circuit_id even if it still exists but has
6635 been marked for close. Try to fix this bug. Some bug remains.
6636 - If we would close a stream early (e.g. it asks for a .exit that
6637 we know would refuse it) but the LeaveStreamsUnattached config
6638 option is set by the controller, then don't close it.
6640 o Bugfixes on 0.1.1.8-alpha:
6641 - Fix a big pile of memory leaks, some of them serious.
6642 - Do not try to download a routerdesc if we would immediately reject
6644 - Resume inserting a newline between all router descriptors when
6645 generating (old style) signed directories, since our spec says
6647 - When providing content-type application/octet-stream for
6648 server descriptors using .z, we were leaving out the
6649 content-encoding header. Oops. (Everything tolerated this just
6650 fine, but that doesn't mean we need to be part of the problem.)
6651 - Fix a potential seg fault in getconf and getinfo using version 1
6652 of the controller protocol.
6653 - Avoid crash: do not check whether DirPort is reachable when we
6654 are suppressing it because of hibernation.
6655 - Make --hash-password not crash on exit.
6658 Changes in version 0.1.1.8-alpha - 2005-10-07
6659 o New features (major):
6660 - Clients don't download or use the directory anymore. Now they
6661 download and use network-statuses from the trusted dirservers,
6662 and fetch individual server descriptors as needed from mirrors.
6663 See dir-spec.txt for all the gory details.
6664 - Be more conservative about whether to advertise our DirPort.
6665 The main change is to not advertise if we're running at capacity
6666 and either a) we could hibernate or b) our capacity is low and
6667 we're using a default DirPort.
6668 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
6670 o New features (minor):
6671 - Try to be smart about when to retry network-status and
6672 server-descriptor fetches. Still needs some tuning.
6673 - Stop parsing, storing, or using running-routers output (but
6674 mirrors still cache and serve it).
6675 - Consider a threshold of versioning dirservers (dirservers who have
6676 an opinion about which Tor versions are still recommended) before
6677 deciding whether to warn the user that he's obsolete.
6678 - Dirservers can now reject/invalidate by key and IP, with the
6679 config options "AuthDirInvalid" and "AuthDirReject". This is
6680 useful since currently we automatically list servers as running
6681 and usable even if we know they're jerks.
6682 - Provide dire warnings to any users who set DirServer; move it out
6683 of torrc.sample and into torrc.complete.
6684 - Add MyFamily to torrc.sample in the server section.
6685 - Add nicknames to the DirServer line, so we can refer to them
6686 without requiring all our users to memorize their IP addresses.
6687 - When we get an EOF or a timeout on a directory connection, note
6688 how many bytes of serverdesc we are dropping. This will help
6689 us determine whether it is smart to parse incomplete serverdesc
6691 - Add a new function to "change pseudonyms" -- that is, to stop
6692 using any currently-dirty circuits for new streams, so we don't
6693 link new actions to old actions. Currently it's only called on
6694 HUP (or SIGNAL RELOAD).
6695 - On sighup, if UseHelperNodes changed to 1, use new circuits.
6696 - Start using RAND_bytes rather than RAND_pseudo_bytes from
6697 OpenSSL. Also, reseed our entropy every hour, not just at
6698 startup. And entropy in 512-bit chunks, not 160-bit chunks.
6700 o Fixes on 0.1.1.7-alpha:
6701 - Nobody ever implemented EVENT_ADDRMAP for control protocol
6702 version 0, so don't let version 0 controllers ask for it.
6703 - If you requested something with too many newlines via the
6704 v1 controller protocol, you could crash tor.
6705 - Fix a number of memory leaks, including some pretty serious ones.
6706 - Re-enable DirPort testing again, so Tor servers will be willing
6707 to advertise their DirPort if it's reachable.
6708 - On TLS handshake, only check the other router's nickname against
6709 its expected nickname if is_named is set.
6711 o Fixes forward-ported from 0.1.0.15:
6712 - Don't crash when we don't have any spare file descriptors and we
6713 try to spawn a dns or cpu worker.
6714 - Make the numbers in read-history and write-history into uint64s,
6715 so they don't overflow and publish negatives in the descriptor.
6718 - For the OS X package's modified privoxy config file, comment
6719 out the "logfile" line so we don't log everything passed
6721 - We were whining about using socks4 or socks5-with-local-lookup
6722 even when it's an IP in the "virtual" range we designed exactly
6724 - We were leaking some memory every time the client changes IPs.
6725 - Never call free() on tor_malloc()d memory. This will help us
6726 use dmalloc to detect memory leaks.
6727 - Check for named servers when looking them up by nickname;
6728 warn when we'recalling a non-named server by its nickname;
6729 don't warn twice about the same name.
6730 - Try to list MyFamily elements by key, not by nickname, and warn
6731 if we've not heard of the server.
6732 - Make windows platform detection (uname equivalent) smarter.
6733 - It turns out sparc64 doesn't like unaligned access either.
6736 Changes in version 0.1.0.15 - 2005-09-23
6737 o Bugfixes on 0.1.0.x:
6738 - Reject ports 465 and 587 (spam targets) in default exit policy.
6739 - Don't crash when we don't have any spare file descriptors and we
6740 try to spawn a dns or cpu worker.
6741 - Get rid of IgnoreVersion undocumented config option, and make us
6742 only warn, never exit, when we're running an obsolete version.
6743 - Don't try to print a null string when your server finds itself to
6744 be unreachable and the Address config option is empty.
6745 - Make the numbers in read-history and write-history into uint64s,
6746 so they don't overflow and publish negatives in the descriptor.
6747 - Fix a minor memory leak in smartlist_string_remove().
6748 - We were only allowing ourselves to upload a server descriptor at
6749 most every 20 minutes, even if it changed earlier than that.
6750 - Clean up log entries that pointed to old URLs.
6753 Changes in version 0.1.1.7-alpha - 2005-09-14
6754 o Fixes on 0.1.1.6-alpha:
6755 - Exit servers were crashing when people asked them to make a
6756 connection to an address not in their exit policy.
6757 - Looking up a non-existent stream for a v1 control connection would
6759 - Fix a seg fault if we ask a dirserver for a descriptor by
6760 fingerprint but he doesn't know about him.
6761 - SETCONF was appending items to linelists, not clearing them.
6762 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
6763 out and refuse the setconf if it would fail.
6764 - Downgrade the dirserver log messages when whining about
6768 - Add Peter Palfrader's check-tor script to tor/contrib/
6769 It lets you easily check whether a given server (referenced by
6770 nickname) is reachable by you.
6771 - Numerous changes to move towards client-side v2 directories. Not
6775 - If the user gave tor an odd number of command-line arguments,
6776 we were silently ignoring the last one. Now we complain and fail.
6777 [This wins the oldest-bug prize -- this bug has been present since
6778 November 2002, as released in Tor 0.0.0.]
6779 - Do not use unaligned memory access on alpha, mips, or mipsel.
6780 It *works*, but is very slow, so we treat them as if it doesn't.
6781 - Retry directory requests if we fail to get an answer we like
6782 from a given dirserver (we were retrying before, but only if
6783 we fail to connect).
6784 - When writing the RecommendedVersions line, sort them first.
6785 - When the client asked for a rendezvous port that the hidden
6786 service didn't want to provide, we were sending an IP address
6787 back along with the end cell. Fortunately, it was zero. But stop
6789 - Correct "your server is reachable" log entries to indicate that
6790 it was self-testing that told us so.
6793 Changes in version 0.1.1.6-alpha - 2005-09-09
6794 o Fixes on 0.1.1.5-alpha:
6795 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
6796 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
6797 - Fix bug with tor_memmem finding a match at the end of the string.
6798 - Make unit tests run without segfaulting.
6799 - Resolve some solaris x86 compile warnings.
6800 - Handle duplicate lines in approved-routers files without warning.
6801 - Fix bug where as soon as a server refused any requests due to his
6802 exit policy (e.g. when we ask for localhost and he tells us that's
6803 127.0.0.1 and he won't do it), we decided he wasn't obeying his
6804 exit policy using him for any exits.
6805 - Only do openssl hardware accelerator stuff if openssl version is
6808 o New controller features/fixes:
6809 - Add a "RESETCONF" command so you can set config options like
6810 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
6811 a config option in the torrc with no value, then it clears it
6812 entirely (rather than setting it to its default).
6813 - Add a "GETINFO config-file" to tell us where torrc is.
6814 - Avoid sending blank lines when GETINFO replies should be empty.
6815 - Add a QUIT command for the controller (for using it manually).
6816 - Fix a bug in SAVECONF that was adding default dirservers and
6817 other redundant entries to the torrc file.
6819 o Start on the new directory design:
6820 - Generate, publish, cache, serve new network-status format.
6821 - Publish individual descriptors (by fingerprint, by "all", and by
6823 - Publish client and server recommended versions separately.
6824 - Allow tor_gzip_uncompress() to handle multiple concatenated
6825 compressed strings. Serve compressed groups of router
6826 descriptors. The compression logic here could be more
6828 - Distinguish v1 authorities (all currently trusted directories)
6829 from v2 authorities (all trusted directories).
6830 - Change DirServers config line to note which dirs are v1 authorities.
6831 - Add configuration option "V1AuthoritativeDirectory 1" which
6832 moria1, moria2, and tor26 should set.
6833 - Remove option when getting directory cache to see whether they
6834 support running-routers; they all do now. Replace it with one
6835 to see whether caches support v2 stuff.
6838 - Dirservers now do their own external reachability testing of each
6839 Tor server, and only list them as running if they've been found to
6840 be reachable. We also send back warnings to the server's logs if
6841 it uploads a descriptor that we already believe is unreachable.
6842 - Implement exit enclaves: if we know an IP address for the
6843 destination, and there's a running Tor server at that address
6844 which allows exit to the destination, then extend the circuit to
6845 that exit first. This provides end-to-end encryption and end-to-end
6846 authentication. Also, if the user wants a .exit address or enclave,
6847 use 4 hops rather than 3, and cannibalize a general circ for it
6849 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
6850 controller. Also, rotate dns and cpu workers if the controller
6851 changes options that will affect them; and initialize the dns
6852 worker cache tree whether or not we start out as a server.
6853 - Only upload a new server descriptor when options change, 18
6854 hours have passed, uptime is reset, or bandwidth changes a lot.
6855 - Check [X-]Forwarded-For headers in HTTP requests when generating
6856 log messages. This lets people run dirservers (and caches) behind
6857 Apache but still know which IP addresses are causing warnings.
6859 o Config option changes:
6860 - Replace (Fascist)Firewall* config options with a new
6861 ReachableAddresses option that understands address policies.
6862 For example, "ReachableAddresses *:80,*:443"
6863 - Get rid of IgnoreVersion undocumented config option, and make us
6864 only warn, never exit, when we're running an obsolete version.
6865 - Make MonthlyAccountingStart config option truly obsolete now.
6868 - Reject ports 465 and 587 in the default exit policy, since
6869 people have started using them for spam too.
6870 - It turns out we couldn't bootstrap a network since we added
6871 reachability detection in 0.1.0.1-rc. Good thing the Tor network
6872 has never gone down. Add an AssumeReachable config option to let
6873 servers and dirservers bootstrap. When we're trying to build a
6874 high-uptime or high-bandwidth circuit but there aren't enough
6875 suitable servers, try being less picky rather than simply failing.
6876 - Our logic to decide if the OR we connected to was the right guy
6877 was brittle and maybe open to a mitm for unverified routers.
6878 - We weren't cannibalizing circuits correctly for
6879 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
6880 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
6881 build those from scratch. This should make hidden services faster.
6882 - Predict required circuits better, with an eye toward making hidden
6883 services faster on the service end.
6884 - Retry streams if the exit node sends back a 'misc' failure. This
6885 should result in fewer random failures. Also, after failing
6886 from resolve failed or misc, reset the num failures, so we give
6887 it a fair shake next time we try.
6888 - Clean up the rendezvous warn log msgs, and downgrade some to info.
6889 - Reduce severity on logs about dns worker spawning and culling.
6890 - When we're shutting down and we do something like try to post a
6891 server descriptor or rendezvous descriptor, don't complain that
6892 we seem to be unreachable. Of course we are, we're shutting down.
6893 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
6894 We don't use them yet, but maybe one day our DNS resolver will be
6895 able to discover them.
6896 - Make ContactInfo mandatory for authoritative directory servers.
6897 - Require server descriptors to list IPv4 addresses -- hostnames
6898 are no longer allowed. This also fixes some potential security
6899 problems with people providing hostnames as their address and then
6900 preferentially resolving them to partition users.
6901 - Change log line for unreachability to explicitly suggest /etc/hosts
6902 as the culprit. Also make it clearer what IP address and ports we're
6903 testing for reachability.
6904 - Put quotes around user-supplied strings when logging so users are
6905 more likely to realize if they add bad characters (like quotes)
6907 - Let auth dir servers start without specifying an Address config
6909 - Make unit tests (and other invocations that aren't the real Tor)
6910 run without launching listeners, creating subdirectories, and so on.
6913 Changes in version 0.1.1.5-alpha - 2005-08-08
6914 o Bugfixes included in 0.1.0.14.
6916 o Bugfixes on 0.1.0.x:
6917 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
6918 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
6919 it would silently using ignore the 6668.
6922 Changes in version 0.1.0.14 - 2005-08-08
6923 o Bugfixes on 0.1.0.x:
6924 - Fix the other half of the bug with crypto handshakes
6926 - Fix an assert trigger if you send a 'signal term' via the
6927 controller when it's listening for 'event info' messages.
6930 Changes in version 0.1.1.4-alpha - 2005-08-04
6931 o Bugfixes included in 0.1.0.13.
6934 - Improve tor_gettimeofday() granularity on windows.
6935 - Make clients regenerate their keys when their IP address changes.
6936 - Implement some more GETINFO goodness: expose helper nodes, config
6937 options, getinfo keys.
6940 Changes in version 0.1.0.13 - 2005-08-04
6941 o Bugfixes on 0.1.0.x:
6942 - Fix a critical bug in the security of our crypto handshakes.
6943 - Fix a size_t underflow in smartlist_join_strings2() that made
6944 it do bad things when you hand it an empty smartlist.
6945 - Fix Windows installer to ship Tor license (thanks to Aphex for
6946 pointing out this oversight) and put a link to the doc directory
6948 - Explicitly set no-unaligned-access for sparc: it turns out the
6949 new gcc's let you compile broken code, but that doesn't make it
6953 Changes in version 0.1.1.3-alpha - 2005-07-23
6954 o Bugfixes on 0.1.1.2-alpha:
6955 - Fix a bug in handling the controller's "post descriptor"
6957 - Fix several bugs in handling the controller's "extend circuit"
6959 - Fix a bug in handling the controller's "stream status" event.
6960 - Fix an assert failure if we have a controller listening for
6961 circuit events and we go offline.
6962 - Re-allow hidden service descriptors to publish 0 intro points.
6963 - Fix a crash when generating your hidden service descriptor if
6964 you don't have enough intro points already.
6966 o New features on 0.1.1.2-alpha:
6967 - New controller function "getinfo accounting", to ask how
6968 many bytes we've used in this time period.
6969 - Experimental support for helper nodes: a lot of the risk from
6970 a small static adversary comes because users pick new random
6971 nodes every time they rebuild a circuit. Now users will try to
6972 stick to the same small set of entry nodes if they can. Not
6973 enabled by default yet.
6975 o Bugfixes on 0.1.0.12:
6976 - If you're an auth dir server, always publish your dirport,
6977 even if you haven't yet found yourself to be reachable.
6978 - Fix a size_t underflow in smartlist_join_strings2() that made
6979 it do bad things when you hand it an empty smartlist.
6982 Changes in version 0.1.0.12 - 2005-07-18
6983 o New directory servers:
6984 - tor26 has changed IP address.
6986 o Bugfixes on 0.1.0.x:
6987 - Fix a possible double-free in tor_gzip_uncompress().
6988 - When --disable-threads is set, do not search for or link against
6990 - Don't trigger an assert if an authoritative directory server
6991 claims its dirport is 0.
6992 - Fix bug with removing Tor as an NT service: some people were
6993 getting "The service did not return an error." Thanks to Matt
6997 Changes in version 0.1.1.2-alpha - 2005-07-15
6998 o New directory servers:
6999 - tor26 has changed IP address.
7001 o Bugfixes on 0.1.0.x, crashes/leaks:
7002 - Port the servers-not-obeying-their-exit-policies fix from
7004 - Fix an fd leak in start_daemon().
7005 - On Windows, you can't always reopen a port right after you've
7006 closed it. So change retry_listeners() to only close and re-open
7007 ports that have changed.
7008 - Fix a possible double-free in tor_gzip_uncompress().
7010 o Bugfixes on 0.1.0.x, usability:
7011 - When tor_socketpair() fails in Windows, give a reasonable
7012 Windows-style errno back.
7013 - Let people type "tor --install" as well as "tor -install" when
7015 want to make it an NT service.
7016 - NT service patch from Matt Edman to improve error messages.
7017 - When the controller asks for a config option with an abbreviated
7018 name, give the full name in our response.
7019 - Correct the man page entry on TrackHostExitsExpire.
7020 - Looks like we were never delivering deflated (i.e. compressed)
7021 running-routers lists, even when asked. Oops.
7022 - When --disable-threads is set, do not search for or link against
7025 o Bugfixes on 0.1.1.x:
7026 - Fix a seg fault with autodetecting which controller version is
7030 - New hidden service descriptor format: put a version in it, and
7031 let people specify introduction/rendezvous points that aren't
7032 in "the directory" (which is subjective anyway).
7033 - Allow the DEBUG controller event to work again. Mark certain log
7034 entries as "don't tell this to controllers", so we avoid cycles.
7037 Changes in version 0.1.0.11 - 2005-06-30
7038 o Bugfixes on 0.1.0.x:
7039 - Fix major security bug: servers were disregarding their
7040 exit policies if clients behaved unexpectedly.
7041 - Make OS X init script check for missing argument, so we don't
7042 confuse users who invoke it incorrectly.
7043 - Fix a seg fault in "tor --hash-password foo".
7044 - The MAPADDRESS control command was broken.
7047 Changes in version 0.1.1.1-alpha - 2005-06-29
7049 - Make OS X init script check for missing argument, so we don't
7050 confuse users who invoke it incorrectly.
7051 - Fix a seg fault in "tor --hash-password foo".
7052 - Fix a possible way to DoS dirservers.
7053 - When we complain that your exit policy implicitly allows local or
7054 private address spaces, name them explicitly so operators can
7056 - Make the log message less scary when all the dirservers are
7057 temporarily unreachable.
7058 - We were printing the number of idle dns workers incorrectly when
7062 - Revised controller protocol (version 1) that uses ascii rather
7063 than binary. Add supporting libraries in python and java so you
7064 can use the controller from your applications without caring how
7066 - Spiffy new support for crypto hardware accelerators. Can somebody
7070 Changes in version 0.0.9.10 - 2005-06-16
7071 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
7072 - Refuse relay cells that claim to have a length larger than the
7073 maximum allowed. This prevents a potential attack that could read
7074 arbitrary memory (e.g. keys) from an exit server's process
7078 Changes in version 0.1.0.10 - 2005-06-14
7079 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
7080 libevent before 1.1a.
7083 Changes in version 0.1.0.9-rc - 2005-06-09
7085 - Reset buf->highwater every time buf_shrink() is called, not just on
7086 a successful shrink. This was causing significant memory bloat.
7087 - Fix buffer overflow when checking hashed passwords.
7088 - Security fix: if seeding the RNG on Win32 fails, quit.
7089 - Allow seeding the RNG on Win32 even when you're not running as
7091 - Disable threading on Solaris too. Something is wonky with it,
7092 cpuworkers, and reentrant libs.
7093 - Reenable the part of the code that tries to flush as soon as an
7094 OR outbuf has a full TLS record available. Perhaps this will make
7095 OR outbufs not grow as huge except in rare cases, thus saving lots
7096 of CPU time plus memory.
7097 - Reject malformed .onion addresses rather then passing them on as
7098 normal web requests.
7099 - Adapt patch from Adam Langley: fix possible memory leak in
7100 tor_lookup_hostname().
7101 - Initialize libevent later in the startup process, so the logs are
7102 already established by the time we start logging libevent warns.
7103 - Use correct errno on win32 if libevent fails.
7104 - Check and warn about known-bad/slow libevent versions.
7105 - Pay more attention to the ClientOnly config option.
7106 - Have torctl.in/tor.sh.in check for location of su binary (needed
7108 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
7109 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
7110 HttpProxyAuthenticator
7111 - Stop warning about sigpipes in the logs. We're going to
7112 pretend that getting these occassionally is normal and fine.
7113 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
7115 installer screens; and don't put stuff into StartupItems unless
7116 the user asks you to.
7117 - Require servers that use the default dirservers to have public IP
7118 addresses. We have too many servers that are configured with private
7119 IPs and their admins never notice the log entries complaining that
7120 their descriptors are being rejected.
7121 - Add OSX uninstall instructions. An actual uninstall script will
7125 Changes in version 0.1.0.8-rc - 2005-05-23
7127 - It turns out that kqueue on OS X 10.3.9 was causing kernel
7128 panics. Disable kqueue on all OS X Tors.
7129 - Fix RPM: remove duplicate line accidentally added to the rpm
7131 - Disable threads on openbsd too, since its gethostaddr is not
7133 - Tolerate libevent 0.8 since it still works, even though it's
7135 - Enable building on Red Hat 9.0 again.
7136 - Allow the middle hop of the testing circuit to be running any
7137 version, now that most of them have the bugfix to let them connect
7138 to unknown servers. This will allow reachability testing to work
7139 even when 0.0.9.7-0.0.9.9 become obsolete.
7140 - Handle relay cells with rh.length too large. This prevents
7141 a potential attack that could read arbitrary memory (maybe even
7142 keys) from the exit server's process.
7143 - We screwed up the dirport reachability testing when we don't yet
7144 have a cached version of the directory. Hopefully now fixed.
7145 - Clean up router_load_single_router() (used by the controller),
7146 so it doesn't seg fault on error.
7147 - Fix a minor memory leak when somebody establishes an introduction
7148 point at your Tor server.
7149 - If a socks connection ends because read fails, don't warn that
7150 you're not sending a socks reply back.
7153 - Add HttpProxyAuthenticator config option too, that works like
7154 the HttpsProxyAuthenticator config option.
7155 - Encode hashed controller passwords in hex instead of base64,
7156 to make it easier to write controllers.
7159 Changes in version 0.1.0.7-rc - 2005-05-17
7161 - Fix a bug in the OS X package installer that prevented it from
7162 installing on Tiger.
7163 - Fix a script bug in the OS X package installer that made it
7164 complain during installation.
7165 - Find libevent even if it's hiding in /usr/local/ and your
7166 CFLAGS and LDFLAGS don't tell you to look there.
7167 - Be able to link with libevent as a shared library (the default
7168 after 1.0d), even if it's hiding in /usr/local/lib and even
7169 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
7170 assuming you're running gcc. Otherwise fail and give a useful
7172 - Fix a bug in the RPM packager: set home directory for _tor to
7173 something more reasonable when first installing.
7174 - Free a minor amount of memory that is still reachable on exit.
7177 Changes in version 0.1.0.6-rc - 2005-05-14
7179 - Implement --disable-threads configure option. Disable threads on
7180 netbsd by default, because it appears to have no reentrant resolver
7182 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
7183 release (1.1) detects and disables kqueue if it's broken.
7184 - Append default exit policy before checking for implicit internal
7185 addresses. Now we don't log a bunch of complaints on startup
7186 when using the default exit policy.
7187 - Some people were putting "Address " in their torrc, and they had
7188 a buggy resolver that resolved " " to 0.0.0.0. Oops.
7189 - If DataDir is ~/.tor, and that expands to /.tor, then default to
7190 LOCALSTATEDIR/tor instead.
7191 - Fix fragmented-message bug in TorControl.py.
7192 - Resolve a minor bug which would prevent unreachable dirports
7193 from getting suppressed in the published descriptor.
7194 - When the controller gave us a new descriptor, we weren't resolving
7195 it immediately, so Tor would think its address was 0.0.0.0 until
7196 we fetched a new directory.
7197 - Fix an uppercase/lowercase case error in suppressing a bogus
7198 libevent warning on some Linuxes.
7201 - Begin scrubbing sensitive strings from logs by default. Turn off
7202 the config option SafeLogging if you need to do debugging.
7203 - Switch to a new buffer management algorithm, which tries to avoid
7204 reallocing and copying quite as much. In first tests it looks like
7205 it uses *more* memory on average, but less cpu.
7206 - First cut at support for "create-fast" cells. Clients can use
7207 these when extending to their first hop, since the TLS already
7208 provides forward secrecy and authentication. Not enabled on
7210 - When dirservers refuse a router descriptor, we now log its
7211 contactinfo, platform, and the poster's IP address.
7212 - Call tor_free_all instead of connections_free_all after forking, to
7213 save memory on systems that need to fork.
7214 - Whine at you if you're a server and you don't set your contactinfo.
7215 - Implement --verify-config command-line option to check if your torrc
7216 is valid without actually launching Tor.
7217 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
7218 rather than just rejecting it.
7221 Changes in version 0.1.0.5-rc - 2005-04-27
7223 - Stop trying to print a null pointer if an OR conn fails because
7224 we didn't like its cert.
7226 - Switch our internal buffers implementation to use a ring buffer,
7227 to hopefully improve performance for fast servers a lot.
7228 - Add HttpsProxyAuthenticator support (basic auth only), based
7229 on patch from Adam Langley.
7230 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
7231 the fast servers that have been joining lately.
7232 - Give hidden service accesses extra time on the first attempt,
7233 since 60 seconds is often only barely enough. This might improve
7235 - Improve performance for dirservers: stop re-parsing the whole
7236 directory every time you regenerate it.
7237 - Add more debugging info to help us find the weird dns freebsd
7238 pthreads bug; cleaner debug messages to help track future issues.
7241 Changes in version 0.0.9.9 - 2005-04-23
7242 o Bugfixes on 0.0.9.x:
7243 - If unofficial Tor clients connect and send weird TLS certs, our
7244 Tor server triggers an assert. This release contains a minimal
7245 backport from the broader fix that we put into 0.1.0.4-rc.
7248 Changes in version 0.1.0.4-rc - 2005-04-23
7250 - If unofficial Tor clients connect and send weird TLS certs, our
7251 Tor server triggers an assert. Stop asserting, and start handling
7252 TLS errors better in other situations too.
7253 - When the controller asks us to tell it about all the debug-level
7254 logs, it turns out we were generating debug-level logs while
7255 telling it about them, which turns into a bad loop. Now keep
7256 track of whether you're sending a debug log to the controller,
7257 and don't log when you are.
7258 - Fix the "postdescriptor" feature of the controller interface: on
7259 non-complete success, only say "done" once.
7261 - Clients are now willing to load balance over up to 2mB, not 1mB,
7262 of advertised bandwidth capacity.
7263 - Add a NoPublish config option, so you can be a server (e.g. for
7264 testing running Tor servers in other Tor networks) without
7265 publishing your descriptor to the primary dirservers.
7268 Changes in version 0.1.0.3-rc - 2005-04-08
7269 o Improvements on 0.1.0.2-rc:
7270 - Client now retries when streams end early for 'hibernating' or
7271 'resource limit' reasons, rather than failing them.
7272 - More automated handling for dirserver operators:
7273 - Automatically approve nodes running 0.1.0.2-rc or later,
7274 now that the the reachability detection stuff is working.
7275 - Now we allow two unverified servers with the same nickname
7276 but different keys. But if a nickname is verified, only that
7277 nickname+key are allowed.
7278 - If you're an authdirserver connecting to an address:port,
7279 and it's not the OR you were expecting, forget about that
7280 descriptor. If he *was* the one you were expecting, then forget
7281 about all other descriptors for that address:port.
7282 - Allow servers to publish descriptors from 12 hours in the future.
7283 Corollary: only whine about clock skew from the dirserver if
7284 he's a trusted dirserver (since now even verified servers could
7285 have quite wrong clocks).
7286 - Adjust maximum skew and age for rendezvous descriptors: let skew
7287 be 48 hours rather than 90 minutes.
7288 - Efficiency improvements:
7289 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
7290 it much faster to look up a circuit for each relay cell.
7291 - Remove most calls to assert_all_pending_dns_resolves_ok(),
7292 since they're eating our cpu on exit nodes.
7293 - Stop wasting time doing a case insensitive comparison for every
7294 dns name every time we do any lookup. Canonicalize the names to
7295 lowercase and be done with it.
7296 - Start sending 'truncated' cells back rather than destroy cells,
7297 if the circuit closes in front of you. This means we won't have
7298 to abandon partially built circuits.
7299 - Only warn once per nickname from add_nickname_list_to_smartlist
7300 per failure, so an entrynode or exitnode choice that's down won't
7302 - Put a note in the torrc about abuse potential with the default
7304 - Revise control spec and implementation to allow all log messages to
7305 be sent to controller with their severities intact (suggested by
7306 Matt Edman). Update TorControl to handle new log event types.
7307 - Provide better explanation messages when controller's POSTDESCRIPTOR
7309 - Stop putting nodename in the Platform string in server descriptors.
7310 It doesn't actually help, and it is confusing/upsetting some people.
7312 o Bugfixes on 0.1.0.2-rc:
7313 - We were printing the host mask wrong in exit policies in server
7314 descriptors. This isn't a critical bug though, since we were still
7315 obeying the exit policy internally.
7316 - Fix Tor when compiled with libevent but without pthreads: move
7317 connection_unregister() from _connection_free() to
7319 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
7320 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
7321 when we look through the connection array, we'll find any of the
7322 cpu/dnsworkers. This is no good.
7324 o Bugfixes on 0.0.9.8:
7325 - Fix possible bug on threading platforms (e.g. win32) which was
7326 leaking a file descriptor whenever a cpuworker or dnsworker died.
7327 - When using preferred entry or exit nodes, ignore whether the
7328 circuit wants uptime or capacity. They asked for the nodes, they
7330 - chdir() to your datadirectory at the *end* of the daemonize process,
7331 not the beginning. This was a problem because the first time you
7332 run tor, if your datadir isn't there, and you have runasdaemon set
7333 to 1, it will try to chdir to it before it tries to create it. Oops.
7334 - Handle changed router status correctly when dirserver reloads
7335 fingerprint file. We used to be dropping all unverified descriptors
7336 right then. The bug was hidden because we would immediately
7337 fetch a directory from another dirserver, which would include the
7338 descriptors we just dropped.
7339 - When we're connecting to an OR and he's got a different nickname/key
7340 than we were expecting, only complain loudly if we're an OP or a
7341 dirserver. Complaining loudly to the OR admins just confuses them.
7342 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
7343 artificially capped at 500kB.
7346 Changes in version 0.0.9.8 - 2005-04-07
7347 o Bugfixes on 0.0.9.x:
7348 - We have a bug that I haven't found yet. Sometimes, very rarely,
7349 cpuworkers get stuck in the 'busy' state, even though the cpuworker
7350 thinks of itself as idle. This meant that no new circuits ever got
7351 established. Here's a workaround to kill any cpuworker that's been
7352 busy for more than 100 seconds.
7355 Changes in version 0.1.0.2-rc - 2005-04-01
7356 o Bugfixes on 0.1.0.1-rc:
7357 - Fixes on reachability detection:
7358 - Don't check for reachability while hibernating.
7359 - If ORPort is reachable but DirPort isn't, still publish the
7360 descriptor, but zero out DirPort until it's found reachable.
7361 - When building testing circs for ORPort testing, use only
7362 high-bandwidth nodes, so fewer circuits fail.
7363 - Complain about unreachable ORPort separately from unreachable
7364 DirPort, so the user knows what's going on.
7365 - Make sure we only conclude ORPort reachability if we didn't
7366 initiate the conn. Otherwise we could falsely conclude that
7367 we're reachable just because we connected to the guy earlier
7368 and he used that same pipe to extend to us.
7369 - Authdirservers shouldn't do ORPort reachability detection,
7370 since they're in clique mode, so it will be rare to find a
7371 server not already connected to them.
7372 - When building testing circuits, always pick middle hops running
7373 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
7374 bug. (This is a kludge; it will go away when 0.0.9.x becomes
7376 - When we decide we're reachable, actually publish our descriptor
7378 - Fix bug in redirectstream in the controller.
7379 - Fix the state descriptor strings so logs don't claim edge streams
7380 are in a different state than they actually are.
7381 - Use recent libevent features when possible (this only really affects
7382 win32 and osx right now, because the new libevent with these
7383 features hasn't been released yet). Add code to suppress spurious
7385 - Prevent possible segfault in connection_close_unattached_ap().
7386 - Fix newlines on torrc in win32.
7387 - Improve error msgs when tor-resolve fails.
7389 o Improvements on 0.0.9.x:
7390 - New experimental script tor/contrib/ExerciseServer.py (needs more
7391 work) that uses the controller interface to build circuits and
7392 fetch pages over them. This will help us bootstrap servers that
7393 have lots of capacity but haven't noticed it yet.
7394 - New experimental script tor/contrib/PathDemo.py (needs more work)
7395 that uses the controller interface to let you choose whole paths
7397 "<hostname>.<path,separated by dots>.<length of path>.path"
7398 - When we've connected to an OR and handshaked but didn't like
7399 the result, we were closing the conn without sending destroy
7400 cells back for pending circuits. Now send those destroys.
7403 Changes in version 0.0.9.7 - 2005-04-01
7404 o Bugfixes on 0.0.9.x:
7405 - Fix another race crash bug (thanks to Glenn Fink for reporting).
7406 - Compare identity to identity, not to nickname, when extending to
7407 a router not already in the directory. This was preventing us from
7408 extending to unknown routers. Oops.
7409 - Make sure to create OS X Tor user in <500 range, so we aren't
7410 creating actual system users.
7411 - Note where connection-that-hasn't-sent-end was marked, and fix
7412 a few really loud instances of this harmless bug (it's fixed more
7416 Changes in version 0.1.0.1-rc - 2005-03-28
7418 - Add reachability testing. Your Tor server will automatically try
7419 to see if its ORPort and DirPort are reachable from the outside,
7420 and it won't upload its descriptor until it decides they are.
7421 - Handle unavailable hidden services better. Handle slow or busy
7422 hidden services better.
7423 - Add support for CONNECTing through https proxies, with "HttpsProxy"
7425 - New exit policy: accept most low-numbered ports, rather than
7426 rejecting most low-numbered ports.
7427 - More Tor controller support (still experimental). See
7428 http://tor.eff.org/doc/control-spec.txt for all the new features,
7429 including signals to emulate unix signals from any platform;
7430 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
7431 closestream; closecircuit; etc.
7432 - Make nt services work and start on startup on win32 (based on
7433 patch by Matt Edman).
7434 - Add a new AddressMap config directive to rewrite incoming socks
7435 addresses. This lets you, for example, declare an implicit
7436 required exit node for certain sites.
7437 - Add a new TrackHostExits config directive to trigger addressmaps
7438 for certain incoming socks addresses -- for sites that break when
7439 your exit keeps changing (based on patch by Mike Perry).
7440 - Redo the client-side dns cache so it's just an addressmap too.
7441 - Notice when our IP changes, and reset stats/uptime/reachability.
7442 - When an application is using socks5, give him the whole variety of
7443 potential socks5 responses (connect refused, host unreachable, etc),
7444 rather than just "success" or "failure".
7445 - A more sane version numbering system. See
7446 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
7447 - New contributed script "exitlist": a simple python script to
7448 parse directories and find Tor nodes that exit to listed
7450 - New contributed script "privoxy-tor-toggle" to toggle whether
7451 Privoxy uses Tor. Seems to be configured for Debian by default.
7452 - Report HTTP reasons to client when getting a response from directory
7453 servers -- so you can actually know what went wrong.
7454 - New config option MaxAdvertisedBandwidth which lets you advertise
7455 a low bandwidthrate (to not attract as many circuits) while still
7456 allowing a higher bandwidthrate in reality.
7458 o Robustness/stability fixes:
7459 - Make Tor use Niels Provos's libevent instead of its current
7460 poll-but-sometimes-select mess. This will let us use faster async
7461 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
7463 - pthread support now too. This was forced because when we forked,
7464 we ended up wasting a lot of duplicate ram over time. Also switch
7465 to foo_r versions of some library calls to allow reentry and
7467 - Better handling for heterogeneous / unreliable nodes:
7468 - Annotate circuits w/ whether they aim to contain high uptime nodes
7469 and/or high capacity nodes. When building circuits, choose
7471 - This means that every single node in an intro rend circuit,
7472 not just the last one, will have a minimum uptime.
7473 - New config option LongLivedPorts to indicate application streams
7474 that will want high uptime circuits.
7475 - Servers reset uptime when a dir fetch entirely fails. This
7476 hopefully reflects stability of the server's network connectivity.
7477 - If somebody starts his tor server in Jan 2004 and then fixes his
7478 clock, don't make his published uptime be a year.
7479 - Reset published uptime when you wake up from hibernation.
7480 - Introduce a notion of 'internal' circs, which are chosen without
7481 regard to the exit policy of the last hop. Intro and rendezvous
7482 circs must be internal circs, to avoid leaking information. Resolve
7483 and connect streams can use internal circs if they want.
7484 - New circuit pooling algorithm: make sure to have enough circs around
7485 to satisfy any predicted ports, and also make sure to have 2 internal
7486 circs around if we've required internal circs lately (and with high
7487 uptime if we've seen that lately too).
7488 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
7489 which describes how often we retry making new circuits if current
7490 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
7491 how long we're willing to make use of an already-dirty circuit.
7492 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
7493 circ as necessary, if there are any completed ones lying around
7494 when we try to launch one.
7495 - Make hidden services try to establish a rendezvous for 30 seconds,
7496 rather than for n (where n=3) attempts to build a circuit.
7497 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
7498 "ShutdownWaitLength".
7499 - Try to be more zealous about calling connection_edge_end when
7500 things go bad with edge conns in connection.c.
7501 - Revise tor-spec to add more/better stream end reasons.
7502 - Revise all calls to connection_edge_end to avoid sending "misc",
7503 and to take errno into account where possible.
7506 - Fix a race condition that can trigger an assert, when we have a
7507 pending create cell and an OR connection fails right then.
7508 - Fix several double-mark-for-close bugs, e.g. where we were finding
7509 a conn for a cell even if that conn is already marked for close.
7510 - Make sequence of log messages when starting on win32 with no config
7511 file more reasonable.
7512 - When choosing an exit node for a new non-internal circ, don't take
7513 into account whether it'll be useful for any pending x.onion
7514 addresses -- it won't.
7515 - Turn addr_policy_compare from a tristate to a quadstate; this should
7516 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
7517 for google.com" problem.
7518 - Make "platform" string in descriptor more accurate for Win32 servers,
7519 so it's not just "unknown platform".
7520 - Fix an edge case in parsing config options (thanks weasel).
7521 If they say "--" on the commandline, it's not an option.
7522 - Reject odd-looking addresses at the client (e.g. addresses that
7523 contain a colon), rather than having the server drop them because
7525 - tor-resolve requests were ignoring .exit if there was a working circuit
7526 they could use instead.
7527 - REUSEADDR on normal platforms means you can rebind to the port
7528 right after somebody else has let it go. But REUSEADDR on win32
7529 means to let you bind to the port _even when somebody else
7530 already has it bound_! So, don't do that on Win32.
7531 - Change version parsing logic: a version is "obsolete" if it is not
7532 recommended and (1) there is a newer recommended version in the
7533 same series, or (2) there are no recommended versions in the same
7534 series, but there are some recommended versions in a newer series.
7535 A version is "new" if it is newer than any recommended version in
7537 - Stop most cases of hanging up on a socks connection without sending
7541 - Require BandwidthRate to be at least 20kB/s for servers.
7542 - When a dirserver causes you to give a warn, mention which dirserver
7544 - New config option DirAllowPrivateAddresses for authdirservers.
7545 Now by default they refuse router descriptors that have non-IP or
7546 private-IP addresses.
7547 - Stop publishing socksport in the directory, since it's not
7548 actually meant to be public. For compatibility, publish a 0 there
7550 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
7551 smart" value, that is low for servers and high for clients.
7552 - If our clock jumps forward by 100 seconds or more, assume something
7553 has gone wrong with our network and abandon all not-yet-used circs.
7554 - Warn when exit policy implicitly allows local addresses.
7555 - If we get an incredibly skewed timestamp from a dirserver mirror
7556 that isn't a verified OR, don't warn -- it's probably him that's
7558 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
7559 cookies to disk and doesn't log each web request to disk. (Thanks
7560 to Brett Carrington for pointing this out.)
7561 - When a client asks us for a dir mirror and we don't have one,
7562 launch an attempt to get a fresh one.
7563 - If we're hibernating and we get a SIGINT, exit immediately.
7564 - Add --with-dmalloc ./configure option, to track memory leaks.
7565 - And try to free all memory on closing, so we can detect what
7567 - Cache local dns resolves correctly even when they're .exit
7569 - Give a better warning when some other server advertises an
7570 ORPort that is actually an apache running ssl.
7571 - Add "opt hibernating 1" to server descriptor to make it clearer
7572 whether the server is hibernating.
7575 Changes in version 0.0.9.6 - 2005-03-24
7576 o Bugfixes on 0.0.9.x (crashes and asserts):
7577 - Add new end stream reasons to maintainance branch. Fix bug where
7578 reason (8) could trigger an assert. Prevent bug from recurring.
7579 - Apparently win32 stat wants paths to not end with a slash.
7580 - Fix assert triggers in assert_cpath_layer_ok(), where we were
7581 blowing away the circuit that conn->cpath_layer points to, then
7582 checking to see if the circ is well-formed. Backport check to make
7583 sure we dont use the cpath on a closed connection.
7584 - Prevent circuit_resume_edge_reading_helper() from trying to package
7585 inbufs for marked-for-close streams.
7586 - Don't crash on hup if your options->address has become unresolvable.
7587 - Some systems (like OS X) sometimes accept() a connection and tell
7588 you the remote host is 0.0.0.0:0. If this happens, due to some
7589 other mis-features, we get confused; so refuse the conn for now.
7591 o Bugfixes on 0.0.9.x (other):
7592 - Fix harmless but scary "Unrecognized content encoding" warn message.
7593 - Add new stream error reason: TORPROTOCOL reason means "you are not
7594 speaking a version of Tor I understand; say bye-bye to your stream."
7595 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
7596 into the future, now that we are more tolerant of skew. This
7597 resolves a bug where a Tor server would refuse to cache a directory
7598 because all the directories it gets are too far in the future;
7599 yet the Tor server never logs any complaints about clock skew.
7600 - Mac packaging magic: make man pages useable, and do not overwrite
7601 existing torrc files.
7602 - Make OS X log happily to /var/log/tor/tor.log
7605 Changes in version 0.0.9.5 - 2005-02-22
7606 o Bugfixes on 0.0.9.x:
7607 - Fix an assert race at exit nodes when resolve requests fail.
7608 - Stop picking unverified dir mirrors--it only leads to misery.
7609 - Patch from Matt Edman to make NT services work better. Service
7610 support is still not compiled into the executable by default.
7611 - Patch from Dmitri Bely so the Tor service runs better under
7612 the win32 SYSTEM account.
7613 - Make tor-resolve actually work (?) on Win32.
7614 - Fix a sign bug when getrlimit claims to have 4+ billion
7615 file descriptors available.
7616 - Stop refusing to start when bandwidthburst == bandwidthrate.
7617 - When create cells have been on the onion queue more than five
7618 seconds, just send back a destroy and take them off the list.
7621 Changes in version 0.0.9.4 - 2005-02-03
7622 o Bugfixes on 0.0.9:
7623 - Fix an assert bug that took down most of our servers: when
7624 a server claims to have 1 GB of bandwidthburst, don't
7626 - Don't crash as badly if we have spawned the max allowed number
7627 of dnsworkers, or we're out of file descriptors.
7628 - Block more file-sharing ports in the default exit policy.
7629 - MaxConn is now automatically set to the hard limit of max
7630 file descriptors we're allowed (ulimit -n), minus a few for
7632 - Give a clearer message when servers need to raise their
7633 ulimit -n when they start running out of file descriptors.
7634 - SGI Compatibility patches from Jan Schaumann.
7635 - Tolerate a corrupt cached directory better.
7636 - When a dirserver hasn't approved your server, list which one.
7637 - Go into soft hibernation after 95% of the bandwidth is used,
7638 not 99%. This is especially important for daily hibernators who
7639 have a small accounting max. Hopefully it will result in fewer
7640 cut connections when the hard hibernation starts.
7641 - Load-balance better when using servers that claim more than
7642 800kB/s of capacity.
7643 - Make NT services work (experimental, only used if compiled in).
7646 Changes in version 0.0.9.3 - 2005-01-21
7647 o Bugfixes on 0.0.9:
7648 - Backport the cpu use fixes from main branch, so busy servers won't
7649 need as much processor time.
7650 - Work better when we go offline and then come back, or when we
7651 run Tor at boot before the network is up. We do this by
7652 optimistically trying to fetch a new directory whenever an
7653 application request comes in and we think we're offline -- the
7654 human is hopefully a good measure of when the network is back.
7655 - Backport some minimal hidserv bugfixes: keep rend circuits open as
7656 long as you keep using them; actually publish hidserv descriptors
7657 shortly after they change, rather than waiting 20-40 minutes.
7658 - Enable Mac startup script by default.
7659 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
7660 - When you update AllowUnverifiedNodes or FirewallPorts via the
7661 controller's setconf feature, we were always appending, never
7663 - When you update HiddenServiceDir via setconf, it was screwing up
7664 the order of reading the lines, making it fail.
7665 - Do not rewrite a cached directory back to the cache; otherwise we
7666 will think it is recent and not fetch a newer one on startup.
7667 - Workaround for webservers that lie about Content-Encoding: Tor
7668 now tries to autodetect compressed directories and compression
7669 itself. This lets us Proxypass dir fetches through apache.
7672 Changes in version 0.0.9.2 - 2005-01-04
7673 o Bugfixes on 0.0.9 (crashes and asserts):
7674 - Fix an assert on startup when the disk is full and you're logging
7676 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
7677 style address, then we'd crash.
7678 - Fix an assert trigger when the running-routers string we get from
7679 a dirserver is broken.
7680 - Make worker threads start and run on win32. Now win32 servers
7682 - Bandaid (not actually fix, but now it doesn't crash) an assert
7683 where the dns worker dies mysteriously and the main Tor process
7684 doesn't remember anything about the address it was resolving.
7686 o Bugfixes on 0.0.9 (Win32):
7687 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
7688 name out of the warning/assert messages.
7689 - Fix a superficial "unhandled error on read" bug on win32.
7690 - The win32 installer no longer requires a click-through for our
7691 license, since our Free Software license grants rights but does not
7693 - Win32: When connecting to a dirserver fails, try another one
7694 immediately. (This was already working for non-win32 Tors.)
7695 - Stop trying to parse $HOME on win32 when hunting for default
7697 - Make tor-resolve.c work on win32 by calling network_init().
7699 o Bugfixes on 0.0.9 (other):
7700 - Make 0.0.9.x build on Solaris again.
7701 - Due to a fencepost error, we were blowing away the \n when reporting
7702 confvalue items in the controller. So asking for multiple config
7703 values at once couldn't work.
7704 - When listing circuits that are pending on an opening OR connection,
7705 if we're an OR we were listing circuits that *end* at us as
7706 being pending on every listener, dns/cpu worker, etc. Stop that.
7707 - Dirservers were failing to create 'running-routers' or 'directory'
7708 strings if we had more than some threshold of routers. Fix them so
7709 they can handle any number of routers.
7710 - Fix a superficial "Duplicate mark for close" bug.
7711 - Stop checking for clock skew for OR connections, even for servers.
7712 - Fix a fencepost error that was chopping off the last letter of any
7713 nickname that is the maximum allowed nickname length.
7714 - Update URLs in log messages so they point to the new website.
7715 - Fix a potential problem in mangling server private keys while
7716 writing to disk (not triggered yet, as far as we know).
7717 - Include the licenses for other free software we include in Tor,
7718 now that we're shipping binary distributions more regularly.
7721 Changes in version 0.0.9.1 - 2004-12-15
7722 o Bugfixes on 0.0.9:
7723 - Make hibernation actually work.
7724 - Make HashedControlPassword config option work.
7725 - When we're reporting event circuit status to a controller,
7726 don't use the stream status code.
7729 Changes in version 0.0.9 - 2004-12-12
7731 - Clean up manpage and torrc.sample file.
7732 - Clean up severities and text of log warnings.
7734 - Make servers trigger an assert when they enter hibernation.
7737 Changes in version 0.0.9rc7 - 2004-12-08
7738 o Bugfixes on 0.0.9rc:
7739 - Fix a stack-trashing crash when an exit node begins hibernating.
7740 - Avoid looking at unallocated memory while considering which
7741 ports we need to build circuits to cover.
7742 - Stop a sigpipe: when an 'end' cell races with eof from the app,
7743 we shouldn't hold-open-until-flush if the eof arrived first.
7744 - Fix a bug with init_cookie_authentication() in the controller.
7745 - When recommending new-format log lines, if the upper bound is
7746 LOG_ERR, leave it implicit.
7748 o Bugfixes on 0.0.8.1:
7749 - Fix a whole slew of memory leaks.
7750 - Fix isspace() and friends so they still make Solaris happy
7751 but also so they don't trigger asserts on win32.
7752 - Fix parse_iso_time on platforms without strptime (eg win32).
7753 - win32: tolerate extra "readable" events better.
7754 - win32: when being multithreaded, leave parent fdarray open.
7755 - Make unit tests work on win32.
7758 Changes in version 0.0.9rc6 - 2004-12-06
7759 o Bugfixes on 0.0.9pre:
7760 - Clean up some more integer underflow opportunities (not exploitable
7762 - While hibernating, hup should not regrow our listeners.
7763 - Send an end to the streams we close when we hibernate, rather
7764 than just chopping them off.
7765 - React to eof immediately on non-open edge connections.
7767 o Bugfixes on 0.0.8.1:
7768 - Calculate timeout for waiting for a connected cell from the time
7769 we sent the begin cell, not from the time the stream started. If
7770 it took a long time to establish the circuit, we would time out
7771 right after sending the begin cell.
7772 - Fix router_compare_addr_to_addr_policy: it was not treating a port
7773 of * as always matching, so we were picking reject *:* nodes as
7774 exit nodes too. Oops.
7777 - New circuit building strategy: keep a list of ports that we've
7778 used in the past 6 hours, and always try to have 2 circuits open
7779 or on the way that will handle each such port. Seed us with port
7780 80 so web users won't complain that Tor is "slow to start up".
7781 - Make kill -USR1 dump more useful stats about circuits.
7782 - When warning about retrying or giving up, print the address, so
7783 the user knows which one it's talking about.
7784 - If you haven't used a clean circuit in an hour, throw it away,
7785 just to be on the safe side. (This means after 6 hours a totally
7786 unused Tor client will have no circuits open.)
7789 Changes in version 0.0.9rc5 - 2004-12-01
7790 o Bugfixes on 0.0.8.1:
7791 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
7792 - Let resolve conns retry/expire also, rather than sticking around
7794 - If we are using select, make sure we stay within FD_SETSIZE.
7796 o Bugfixes on 0.0.9pre:
7797 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
7798 but doesn't seem to be currently; thanks to Ilja van Sprundel for
7800 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
7801 instead. Impose minima and maxima for all *Period options; impose
7802 even tighter maxima for fetching if we are a caching dirserver.
7803 Clip rather than rejecting.
7804 - Fetch cached running-routers from servers that serve it (that is,
7805 authdirservers and servers running 0.0.9rc5-cvs or later.)
7808 - Accept *:706 (silc) in default exit policy.
7809 - Implement new versioning format for post 0.1.
7810 - Support "foo.nickname.exit" addresses, to let Alice request the
7811 address "foo" as viewed by exit node "nickname". Based on a patch
7813 - Make tor --version --version dump the cvs Id of every file.
7816 Changes in version 0.0.9rc4 - 2004-11-28
7817 o Bugfixes on 0.0.8.1:
7818 - Make windows sockets actually non-blocking (oops), and handle
7819 win32 socket errors better.
7821 o Bugfixes on 0.0.9rc1:
7822 - Actually catch the -USR2 signal.
7825 Changes in version 0.0.9rc3 - 2004-11-25
7826 o Bugfixes on 0.0.8.1:
7827 - Flush the log file descriptor after we print "Tor opening log file",
7828 so we don't see those messages days later.
7830 o Bugfixes on 0.0.9rc1:
7831 - Make tor-resolve work again.
7832 - Avoid infinite loop in tor-resolve if tor hangs up on it.
7833 - Fix an assert trigger for clients/servers handling resolves.
7836 Changes in version 0.0.9rc2 - 2004-11-24
7837 o Bugfixes on 0.0.9rc1:
7838 - I broke socks5 support while fixing the eof bug.
7839 - Allow unitless bandwidths and intervals; they default to bytes
7841 - New servers don't start out hibernating; they are active until
7842 they run out of bytes, so they have a better estimate of how
7843 long it takes, and so their operators can know they're working.
7846 Changes in version 0.0.9rc1 - 2004-11-23
7847 o Bugfixes on 0.0.8.1:
7848 - Finally fix a bug that's been plaguing us for a year:
7849 With high load, circuit package window was reaching 0. Whenever
7850 we got a circuit-level sendme, we were reading a lot on each
7851 socket, but only writing out a bit. So we would eventually reach
7852 eof. This would be noticed and acted on even when there were still
7853 bytes sitting in the inbuf.
7854 - When poll() is interrupted, we shouldn't believe the revents values.
7856 o Bugfixes on 0.0.9pre6:
7857 - Fix hibernate bug that caused pre6 to be broken.
7858 - Don't keep rephist info for routers that haven't had activity for
7859 24 hours. (This matters now that clients have keys, since we track
7861 - Never call close_temp_logs while validating log options.
7862 - Fix backslash-escaping on tor.sh.in and torctl.in.
7865 - Implement weekly/monthly/daily accounting: now you specify your
7866 hibernation properties by
7867 AccountingMax N bytes|KB|MB|GB|TB
7868 AccountingStart day|week|month [day] HH:MM
7869 Defaults to "month 1 0:00".
7870 - Let bandwidth and interval config options be specified as 5 bytes,
7871 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
7872 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
7873 get back to normal.)
7874 - If your requested entry or exit node has advertised bandwidth 0,
7876 - Be more greedy about filling up relay cells -- we try reading again
7877 once we've processed the stuff we read, in case enough has arrived
7878 to fill the last cell completely.
7879 - Apply NT service patch from Osamu Fujino. Still needs more work.
7882 Changes in version 0.0.9pre6 - 2004-11-15
7883 o Bugfixes on 0.0.8.1:
7884 - Fix assert failure on malformed socks4a requests.
7885 - Use identity comparison, not nickname comparison, to choose which
7886 half of circuit-ID-space each side gets to use. This is needed
7887 because sometimes we think of a router as a nickname, and sometimes
7888 as a hex ID, and we can't predict what the other side will do.
7889 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
7890 write() call will fail and we handle it there.
7891 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
7892 and smartlist_len, which are two major profiling offenders.
7894 o Bugfixes on 0.0.9pre5:
7895 - Fix a bug in read_all that was corrupting config files on windows.
7896 - When we're raising the max number of open file descriptors to
7897 'unlimited', don't log that we just raised it to '-1'.
7898 - Include event code with events, as required by control-spec.txt.
7899 - Don't give a fingerprint when clients do --list-fingerprint:
7900 it's misleading, because it will never be the same again.
7901 - Stop using strlcpy in tor_strndup, since it was slowing us
7903 - Remove warn on startup about missing cached-directory file.
7904 - Make kill -USR1 work again.
7905 - Hibernate if we start tor during the "wait for wakeup-time" phase
7906 of an accounting interval. Log our hibernation plans better.
7907 - Authoritative dirservers now also cache their directory, so they
7908 have it on start-up.
7911 - Fetch running-routers; cache running-routers; compress
7912 running-routers; serve compressed running-routers.z
7913 - Add NSI installer script contributed by J Doe.
7914 - Commit VC6 and VC7 workspace/project files.
7915 - Commit a tor.spec for making RPM files, with help from jbash.
7916 - Add contrib/torctl.in contributed by Glenn Fink.
7917 - Implement the control-spec's SAVECONF command, to write your
7918 configuration to torrc.
7919 - Get cookie authentication for the controller closer to working.
7920 - Include control-spec.txt in the tarball.
7921 - When set_conf changes our server descriptor, upload a new copy.
7922 But don't upload it too often if there are frequent changes.
7923 - Document authentication config in man page, and document signals
7925 - Clean up confusing parts of man page and torrc.sample.
7926 - Make expand_filename handle ~ and ~username.
7927 - Use autoconf to enable largefile support where necessary. Use
7928 ftello where available, since ftell can fail at 2GB.
7929 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
7930 log more informatively.
7931 - Give a slightly more useful output for "tor -h".
7932 - Refuse application socks connections to port 0.
7933 - Check clock skew for verified servers, but allow unverified
7934 servers and clients to have any clock skew.
7935 - Break DirFetchPostPeriod into:
7936 - DirFetchPeriod for fetching full directory,
7937 - StatusFetchPeriod for fetching running-routers,
7938 - DirPostPeriod for posting server descriptor,
7939 - RendPostPeriod for posting hidden service descriptors.
7940 - Make sure the hidden service descriptors are at a random offset
7941 from each other, to hinder linkability.
7944 Changes in version 0.0.9pre5 - 2004-11-09
7945 o Bugfixes on 0.0.9pre4:
7946 - Fix a seg fault in unit tests (doesn't affect main program).
7947 - Fix an assert bug where a hidden service provider would fail if
7948 the first hop of his rendezvous circuit was down.
7949 - Hidden service operators now correctly handle version 1 style
7950 INTRODUCE1 cells (nobody generates them still, so not a critical
7952 - If do_hup fails, actually notice.
7953 - Handle more errnos from accept() without closing the listener.
7954 Some OpenBSD machines were closing their listeners because
7955 they ran out of file descriptors.
7956 - Send resolve cells to exit routers that are running a new
7957 enough version of the resolve code to work right.
7958 - Better handling of winsock includes on non-MSV win32 compilers.
7959 - Some people had wrapped their tor client/server in a script
7960 that would restart it whenever it died. This did not play well
7961 with our "shut down if your version is obsolete" code. Now people
7962 don't fetch a new directory if their local cached version is
7964 - Make our autogen.sh work on ksh as well as bash.
7967 - Hibernation: New config option "AccountingMaxKB" lets you
7968 set how many KBytes per month you want to allow your server to
7969 consume. Rather than spreading those bytes out evenly over the
7970 month, we instead hibernate for some of the month and pop up
7971 at a deterministic time, work until the bytes are consumed, then
7972 hibernate again. Config option "MonthlyAccountingStart" lets you
7973 specify which day of the month your billing cycle starts on.
7974 - Control interface: a separate program can now talk to your
7975 client/server over a socket, and get/set config options, receive
7976 notifications of circuits and streams starting/finishing/dying,
7977 bandwidth used, etc. The next step is to get some GUIs working.
7978 Let us know if you want to help out. See doc/control-spec.txt .
7979 - Ship a contrib/tor-control.py as an example script to interact
7980 with the control port.
7981 - "tor --hash-password zzyxz" will output a salted password for
7982 use in authenticating to the control interface.
7983 - New log format in config:
7984 "Log minsev[-maxsev] stdout|stderr|syslog" or
7985 "Log minsev[-maxsev] file /var/foo"
7988 - DirPolicy config option, to let people reject incoming addresses
7989 from their dirserver.
7990 - "tor --list-fingerprint" will list your identity key fingerprint
7992 - Add "pass" target for RedirectExit, to make it easier to break
7993 out of a sequence of RedirectExit rules.
7994 - Clients now generate a TLS cert too, in preparation for having
7995 them act more like real nodes.
7996 - Ship src/win32/ in the tarball, so people can use it to build.
7997 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
7999 - New "router-status" line in directory, to better bind each verified
8000 nickname to its identity key.
8001 - Deprecate unofficial config option abbreviations, and abbreviations
8002 not on the command line.
8003 - Add a pure-C tor-resolve implementation.
8004 - Use getrlimit and friends to ensure we can reach MaxConn (currently
8005 1024) file descriptors.
8007 o Code security improvements, inspired by Ilja:
8008 - Replace sprintf with snprintf. (I think they were all safe, but
8010 - Replace strcpy/strncpy with strlcpy in more places.
8011 - Avoid strcat; use snprintf or strlcat instead.
8012 - snprintf wrapper with consistent (though not C99) overflow behavior.
8015 Changes in version 0.0.9pre4 - 2004-10-17
8016 o Bugfixes on 0.0.9pre3:
8017 - If the server doesn't specify an exit policy, use the real default
8018 exit policy, not reject *:*.
8019 - Ignore fascistfirewall when uploading/downloading hidden service
8020 descriptors, since we go through Tor for those; and when using
8021 an HttpProxy, since we assume it can reach them all.
8022 - When looking for an authoritative dirserver, use only the ones
8023 configured at boot. Don't bother looking in the directory.
8024 - The rest of the fix for get_default_conf_file() on older win32.
8025 - Make 'Routerfile' config option obsolete.
8028 - New 'MyFamily nick1,...' config option for a server to
8029 specify other servers that shouldn't be used in the same circuit
8030 with it. Only believed if nick1 also specifies us.
8031 - New 'NodeFamily nick1,nick2,...' config option for a client to
8032 specify nodes that it doesn't want to use in the same circuit.
8033 - New 'Redirectexit pattern address:port' config option for a
8034 server to redirect exit connections, e.g. to a local squid.
8037 Changes in version 0.0.9pre3 - 2004-10-13
8038 o Bugfixes on 0.0.8.1:
8039 - Better torrc example lines for dirbindaddress and orbindaddress.
8040 - Improved bounds checking on parsed ints (e.g. config options and
8041 the ones we find in directories.)
8042 - Better handling of size_t vs int, so we're more robust on 64
8044 - Fix the rest of the bug where a newly started OR would appear
8045 as unverified even after we've added his fingerprint and hupped
8047 - Fix a bug from 0.0.7: when read() failed on a stream, we would
8048 close it without sending back an end. So 'connection refused'
8049 would simply be ignored and the user would get no response.
8051 o Bugfixes on 0.0.9pre2:
8052 - Serving the cached-on-disk directory to people is bad. We now
8053 provide no directory until we've fetched a fresh one.
8054 - Workaround for bug on windows where cached-directories get crlf
8056 - Make get_default_conf_file() work on older windows too.
8057 - If we write a *:* exit policy line in the descriptor, don't write
8058 any more exit policy lines.
8061 - Use only 0.0.9pre1 and later servers for resolve cells.
8062 - Make the dirservers file obsolete.
8063 - Include a dir-signing-key token in directories to tell the
8064 parsing entity which key is being used to sign.
8065 - Remove the built-in bulky default dirservers string.
8066 - New config option "Dirserver %s:%d [fingerprint]", which can be
8067 repeated as many times as needed. If no dirservers specified,
8068 default to moria1,moria2,tor26.
8069 - Make moria2 advertise a dirport of 80, so people behind firewalls
8070 will be able to get a directory.
8071 - Http proxy support
8072 - Dirservers translate requests for http://%s:%d/x to /x
8073 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
8074 be routed through this host.
8075 - Clients ask for /tor/x rather than /x for new enough dirservers.
8076 This way we can one day coexist peacefully with apache.
8077 - Clients specify a "Host: %s%d" http header, to be compatible
8078 with more proxies, and so running squid on an exit node can work.
8081 Changes in version 0.0.8.1 - 2004-10-13
8083 - Fix a seg fault that can be triggered remotely for Tor
8084 clients/servers with an open dirport.
8085 - Fix a rare assert trigger, where routerinfos for entries in
8086 our cpath would expire while we're building the path.
8087 - Fix a bug in OutboundBindAddress so it (hopefully) works.
8088 - Fix a rare seg fault for people running hidden services on
8089 intermittent connections.
8090 - Fix a bug in parsing opt keywords with objects.
8091 - Fix a stale pointer assert bug when a stream detaches and
8093 - Fix a string format vulnerability (probably not exploitable)
8094 in reporting stats locally.
8095 - Fix an assert trigger: sometimes launching circuits can fail
8096 immediately, e.g. because too many circuits have failed recently.
8097 - Fix a compile warning on 64 bit platforms.
8100 Changes in version 0.0.9pre2 - 2004-10-03
8102 - Make fetching a cached directory work for 64-bit platforms too.
8103 - Make zlib.h a required header, not an optional header.
8106 Changes in version 0.0.9pre1 - 2004-10-01
8108 - Stop using separate defaults for no-config-file and
8109 empty-config-file. Now you have to explicitly turn off SocksPort,
8110 if you don't want it open.
8111 - Fix a bug in OutboundBindAddress so it (hopefully) works.
8112 - Improve man page to mention more of the 0.0.8 features.
8113 - Fix a rare seg fault for people running hidden services on
8114 intermittent connections.
8115 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
8117 - Fix more dns related bugs: send back resolve_failed and end cells
8118 more reliably when the resolve fails, rather than closing the
8119 circuit and then trying to send the cell. Also attach dummy resolve
8120 connections to a circuit *before* calling dns_resolve(), to fix
8121 a bug where cached answers would never be sent in RESOLVED cells.
8122 - When we run out of disk space, or other log writing error, don't
8123 crash. Just stop logging to that log and continue.
8124 - We were starting to daemonize before we opened our logs, so if
8125 there were any problems opening logs, we would complain to stderr,
8126 which wouldn't work, and then mysteriously exit.
8127 - Fix a rare bug where sometimes a verified OR would connect to us
8128 before he'd uploaded his descriptor, which would cause us to
8129 assign conn->nickname as though he's unverified. Now we look through
8130 the fingerprint list to see if he's there.
8131 - Fix a rare assert trigger, where routerinfos for entries in
8132 our cpath would expire while we're building the path.
8135 - Clients can ask dirservers for /dir.z to get a compressed version
8136 of the directory. Only works for servers running 0.0.9, of course.
8137 - Make clients cache directories and use them to seed their router
8138 lists at startup. This means clients have a datadir again.
8139 - Configuration infrastructure support for warning on obsolete
8141 - Respond to content-encoding headers by trying to uncompress as
8143 - Reply with a deflated directory when a client asks for "dir.z".
8144 We could use allow-encodings instead, but allow-encodings isn't
8145 specified in HTTP 1.0.
8146 - Raise the max dns workers from 50 to 100.
8147 - Discourage people from setting their dirfetchpostperiod more often
8148 than once per minute.
8149 - Protect dirservers from overzealous descriptor uploading -- wait
8150 10 seconds after directory gets dirty, before regenerating.
8153 Changes in version 0.0.8 - 2004-08-25
8154 o Port it to SunOS 5.9 / Athena
8157 Changes in version 0.0.8rc2 - 2004-08-20
8158 o Make it compile on cygwin again.
8159 o When picking unverified routers, skip those with low uptime and/or
8160 low bandwidth, depending on what properties you care about.
8163 Changes in version 0.0.8rc1 - 2004-08-18
8164 o Changes from 0.0.7.3:
8166 - Fix assert triggers: if the other side returns an address 0.0.0.0,
8167 don't put it into the client dns cache.
8168 - If a begin failed due to exit policy, but we believe the IP address
8169 should have been allowed, switch that router to exitpolicy reject *:*
8170 until we get our next directory.
8172 - Clients choose nodes proportional to advertised bandwidth.
8173 - Avoid using nodes with low uptime as introduction points.
8174 - Handle servers with dynamic IP addresses: don't replace
8175 options->Address with the resolved one at startup, and
8176 detect our address right before we make a routerinfo each time.
8177 - 'FascistFirewall' option to pick dirservers and ORs on specific
8178 ports; plus 'FirewallPorts' config option to tell FascistFirewall
8179 which ports are open. (Defaults to 80,443)
8180 - Be more aggressive about trying to make circuits when the network
8181 has changed (e.g. when you unsuspend your laptop).
8182 - Check for time skew on http headers; report date in response to
8184 - If the entrynode config line has only one node, don't pick it as
8186 - Add strict{entry|exit}nodes config options. If set to 1, then
8187 we refuse to build circuits that don't include the specified entry
8189 - OutboundBindAddress config option, to bind to a specific
8190 IP address for outgoing connect()s.
8191 - End truncated log entries (e.g. directories) with "[truncated]".
8193 o Patches to 0.0.8preX:
8195 - Patches to compile and run on win32 again (maybe)?
8196 - Fix crash when looking for ~/.torrc with no $HOME set.
8197 - Fix a race bug in the unit tests.
8198 - Handle verified/unverified name collisions better when new
8199 routerinfo's arrive in a directory.
8200 - Sometimes routers were getting entered into the stats before
8201 we'd assigned their identity_digest. Oops.
8202 - Only pick and establish intro points after we've gotten a
8205 - AllowUnverifiedNodes config option to let circuits choose no-name
8206 routers in entry,middle,exit,introduction,rendezvous positions.
8207 Allow middle and rendezvous positions by default.
8208 - Add a man page for tor-resolve.
8211 Changes in version 0.0.7.3 - 2004-08-12
8212 o Stop dnsworkers from triggering an assert failure when you
8213 ask them to resolve the host "".
8216 Changes in version 0.0.8pre3 - 2004-08-09
8217 o Changes from 0.0.7.2:
8218 - Allow multiple ORs with same nickname in routerlist -- now when
8219 people give us one identity key for a nickname, then later
8220 another, we don't constantly complain until the first expires.
8221 - Remember used bandwidth (both in and out), and publish 15-minute
8222 snapshots for the past day into our descriptor.
8223 - You can now fetch $DIRURL/running-routers to get just the
8224 running-routers line, not the whole descriptor list. (But
8225 clients don't use this yet.)
8226 - When people mistakenly use Tor as an http proxy, point them
8227 at the tor-doc.html rather than the INSTALL.
8228 - Remove our mostly unused -- and broken -- hex_encode()
8229 function. Use base16_encode() instead. (Thanks to Timo Lindfors
8230 for pointing out this bug.)
8231 - Rotate onion keys every 12 hours, not every 2 hours, so we have
8232 fewer problems with people using the wrong key.
8233 - Change the default exit policy to reject the default edonkey,
8234 kazaa, gnutella ports.
8235 - Add replace_file() to util.[ch] to handle win32's rename().
8237 o Changes from 0.0.8preX:
8238 - Fix two bugs in saving onion keys to disk when rotating, so
8239 hopefully we'll get fewer people using old onion keys.
8240 - Fix an assert error that was making SocksPolicy not work.
8241 - Be willing to expire routers that have an open dirport -- it's
8242 just the authoritative dirservers we want to not forget.
8243 - Reject tor-resolve requests for .onion addresses early, so we
8244 don't build a whole rendezvous circuit and then fail.
8245 - When you're warning a server that he's unverified, don't cry
8247 - Fix a race condition: don't try to extend onto a connection
8248 that's still handshaking.
8249 - For servers in clique mode, require the conn to be open before
8250 you'll choose it for your path.
8251 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
8252 end relay cell, etc.
8253 - Measure bandwidth capacity over the last 24 hours, not just 12
8254 - Bugfix: authoritative dirservers were making and signing a new
8255 directory for each client, rather than reusing the cached one.
8258 Changes in version 0.0.8pre2 - 2004-08-04
8259 o Changes from 0.0.7.2:
8261 - Check directory signature _before_ you decide whether you're
8262 you're running an obsolete version and should exit.
8263 - Check directory signature _before_ you parse the running-routers
8264 list to decide who's running or verified.
8265 - Bugfixes and features:
8266 - Check return value of fclose while writing to disk, so we don't
8267 end up with broken files when servers run out of disk space.
8268 - Log a warning if the user uses an unsafe socks variant, so people
8269 are more likely to learn about privoxy or socat.
8270 - Dirservers now include RFC1123-style dates in the HTTP headers,
8271 which one day we will use to better detect clock skew.
8273 o Changes from 0.0.8pre1:
8274 - Make it compile without warnings again on win32.
8275 - Log a warning if you're running an unverified server, to let you
8276 know you might want to get it verified.
8277 - Only pick a default nickname if you plan to be a server.
8280 Changes in version 0.0.8pre1 - 2004-07-23
8282 - Made our unit tests compile again on OpenBSD 3.5, and tor
8283 itself compile again on OpenBSD on a sparc64.
8284 - We were neglecting milliseconds when logging on win32, so
8285 everything appeared to happen at the beginning of each second.
8288 - 'Extend' relay cell payloads now include the digest of the
8289 intended next hop's identity key. Now we can verify that we're
8290 extending to the right router, and also extend to routers we
8291 hadn't heard of before.
8294 - Tor nodes can now act as relays (with an advertised ORPort)
8295 without being manually verified by the dirserver operators.
8296 - Uploaded descriptors of unverified routers are now accepted
8297 by the dirservers, and included in the directory.
8298 - Verified routers are listed by nickname in the running-routers
8299 list; unverified routers are listed as "$<fingerprint>".
8300 - We now use hash-of-identity-key in most places rather than
8301 nickname or addr:port, for improved security/flexibility.
8302 - To avoid Sybil attacks, paths still use only verified servers.
8303 But now we have a chance to play around with hybrid approaches.
8304 - Nodes track bandwidth usage to estimate capacity (not used yet).
8305 - ClientOnly option for nodes that never want to become servers.
8306 - Directory caching.
8307 - "AuthoritativeDir 1" option for the official dirservers.
8308 - Now other nodes (clients and servers) will cache the latest
8309 directory they've pulled down.
8310 - They can enable their DirPort to serve it to others.
8311 - Clients will pull down a directory from any node with an open
8312 DirPort, and check the signature/timestamp correctly.
8313 - Authoritative dirservers now fetch directories from other
8314 authdirservers, to stay better synced.
8315 - Running-routers list tells who's down also, along with noting
8316 if they're verified (listed by nickname) or unverified (listed
8318 - Allow dirservers to serve running-router list separately.
8319 This isn't used yet.
8320 - ORs connect-on-demand to other ORs
8321 - If you get an extend cell to an OR you're not connected to,
8322 connect, handshake, and forward the create cell.
8323 - The authoritative dirservers stay connected to everybody,
8324 and everybody stays connected to 0.0.7 servers, but otherwise
8325 clients/servers expire unused connections after 5 minutes.
8326 - When servers get a sigint, they delay 30 seconds (refusing new
8327 connections) then exit. A second sigint causes immediate exit.
8328 - File and name management:
8329 - Look for .torrc if no CONFDIR "torrc" is found.
8330 - If no datadir is defined, then choose, make, and secure ~/.tor
8332 - If torrc not found, exitpolicy reject *:*.
8333 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
8334 - If no nickname is defined, derive default from hostname.
8335 - Rename secret key files, e.g. identity.key -> secret_id_key,
8336 to discourage people from mailing their identity key to tor-ops.
8337 - Refuse to build a circuit before the directory has arrived --
8338 it won't work anyway, since you won't know the right onion keys
8340 - Try other dirservers immediately if the one you try is down. This
8341 should tolerate down dirservers better now.
8342 - Parse tor version numbers so we can do an is-newer-than check
8343 rather than an is-in-the-list check.
8344 - New socks command 'resolve', to let us shim gethostbyname()
8346 - A 'tor_resolve' script to access the socks resolve functionality.
8347 - A new socks-extensions.txt doc file to describe our
8348 interpretation and extensions to the socks protocols.
8349 - Add a ContactInfo option, which gets published in descriptor.
8350 - Publish OR uptime in descriptor (and thus in directory) too.
8351 - Write tor version at the top of each log file
8352 - New docs in the tarball:
8354 - Document that you should proxy your SSL traffic too.
8357 Changes in version 0.0.7.2 - 2004-07-07
8358 o A better fix for the 0.0.0.0 problem, that will hopefully
8359 eliminate the remaining related assertion failures.
8362 Changes in version 0.0.7.1 - 2004-07-04
8363 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
8364 since internally we use 0.0.0.0 to signify "not yet resolved".
8367 Changes in version 0.0.7 - 2004-06-07
8368 o Updated the man page to reflect the new features.
8371 Changes in version 0.0.7rc2 - 2004-06-06
8372 o Changes from 0.0.7rc1:
8373 - Make it build on Win32 again.
8374 o Changes from 0.0.6.2:
8375 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
8379 Changes in version 0.0.7rc1 - 2004-06-02
8381 - On sighup, we were adding another log without removing the first
8382 one. So log messages would get duplicated n times for n sighups.
8383 - Several cases of using a connection after we'd freed it. The
8384 problem was that connections that are pending resolve are in both
8385 the pending_resolve tree, and also the circuit's resolving_streams
8386 list. When you want to remove one, you must remove it from both.
8387 - Fix a double-mark-for-close where an end cell arrived for a
8388 resolving stream, and then the resolve failed.
8389 - Check directory signatures based on name of signer, not on whom
8390 we got the directory from. This will let us cache directories more
8393 - Crank up some of our constants to handle more users.
8396 Changes in version 0.0.7pre1 - 2004-06-02
8397 o Fixes for crashes and other obnoxious bugs:
8398 - Fix an epipe bug: sometimes when directory connections failed
8399 to connect, we would give them a chance to flush before closing
8401 - When we detached from a circuit because of resolvefailed, we
8402 would immediately try the same circuit twice more, and then
8403 give up on the resolve thinking we'd tried three different
8405 - Limit the number of intro circuits we'll attempt to build for a
8406 hidden service per 15-minute period.
8407 - Check recommended-software string *early*, before actually parsing
8408 the directory. Thus we can detect an obsolete version and exit,
8409 even if the new directory format doesn't parse.
8410 o Fixes for security bugs:
8411 - Remember which nodes are dirservers when you startup, and if a
8412 random OR enables his dirport, don't automatically assume he's
8413 a trusted dirserver.
8415 - Directory connections were asking the wrong poll socket to
8416 start writing, and not asking themselves to start writing.
8417 - When we detached from a circuit because we sent a begin but
8418 didn't get a connected, we would use it again the first time;
8419 but after that we would correctly switch to a different one.
8420 - Stop warning when the first onion decrypt attempt fails; they
8421 will sometimes legitimately fail now that we rotate keys.
8422 - Override unaligned-access-ok check when $host_cpu is ia64 or
8423 arm. Apparently they allow it but the kernel whines.
8424 - Dirservers try to reconnect periodically too, in case connections
8426 - Fix some memory leaks in directory servers.
8427 - Allow backslash in Win32 filenames.
8428 - Made Tor build complain-free on FreeBSD, hopefully without
8429 breaking other BSD builds. We'll see.
8431 - Doxygen markup on all functions and global variables.
8432 - Make directory functions update routerlist, not replace it. So
8433 now directory disagreements are not so critical a problem.
8434 - Remove the upper limit on number of descriptors in a dirserver's
8435 directory (not that we were anywhere close).
8436 - Allow multiple logfiles at different severity ranges.
8437 - Allow *BindAddress to specify ":port" rather than setting *Port
8438 separately. Allow multiple instances of each BindAddress config
8439 option, so you can bind to multiple interfaces if you want.
8440 - Allow multiple exit policy lines, which are processed in order.
8441 Now we don't need that huge line with all the commas in it.
8442 - Enable accept/reject policies on SOCKS connections, so you can bind
8443 to 0.0.0.0 but still control who can use your OP.
8446 Changes in version 0.0.6.2 - 2004-05-16
8447 o Our integrity-checking digest was checking only the most recent cell,
8448 not the previous cells like we'd thought.
8449 Thanks to Stefan Mark for finding the flaw!
8452 Changes in version 0.0.6.1 - 2004-05-06
8453 o Fix two bugs in our AES counter-mode implementation (this affected
8454 onion-level stream encryption, but not TLS-level). It turns
8455 out we were doing something much more akin to a 16-character
8456 polyalphabetic cipher. Oops.
8457 Thanks to Stefan Mark for finding the flaw!
8458 o Retire moria3 as a directory server, and add tor26 as a directory
8462 Changes in version 0.0.6 - 2004-05-02
8466 Changes in version 0.0.6rc4 - 2004-05-01
8467 o Update the built-in dirservers list to use the new directory format
8468 o Fix a rare seg fault: if a node offering a hidden service attempts
8469 to build a circuit to Alice's rendezvous point and fails before it
8470 reaches the last hop, it retries with a different circuit, but
8472 o Handle windows socket errors correctly.
8475 Changes in version 0.0.6rc3 - 2004-04-28
8476 o Don't expire non-general excess circuits (if we had enough
8477 circuits open, we were expiring rendezvous circuits -- even
8478 when they had a stream attached. oops.)
8479 o Fetch randomness from /dev/urandom better (not via fopen/fread)
8480 o Better debugging for tls errors
8481 o Some versions of openssl have an SSL_pending function that erroneously
8482 returns bytes when there is a non-application record pending.
8483 o Set Content-Type on the directory and hidserv descriptor.
8484 o Remove IVs from cipher code, since AES-ctr has none.
8485 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
8486 o We were using an array of length zero in a few places.
8487 o win32's gethostbyname can't resolve an IP to an IP.
8488 o win32's close can't close a socket.
8491 Changes in version 0.0.6rc2 - 2004-04-26
8492 o Fix a bug where we were closing tls connections intermittently.
8493 It turns out openssl keeps its errors around -- so if an error
8494 happens, and you don't ask about it, and then another openssl
8495 operation happens and succeeds, and you ask if there was an error,
8496 it tells you about the first error. Fun fun.
8497 o Fix a bug that's been lurking since 27 may 03 (!)
8498 When passing back a destroy cell, we would use the wrong circ id.
8499 'Mostly harmless', but still worth fixing.
8500 o Since we don't support truncateds much, don't bother sending them;
8501 just close the circ.
8502 o check for <machine/limits.h> so we build on NetBSD again (I hope).
8503 o don't crash if a conn that sent a begin has suddenly lost its circuit
8504 (this was quite rare).
8507 Changes in version 0.0.6rc1 - 2004-04-25
8508 o We now rotate link (tls context) keys and onion keys.
8509 o CREATE cells now include oaep padding, so you can tell
8510 if you decrypted them correctly.
8511 o Add bandwidthburst to server descriptor.
8512 o Directories now say which dirserver signed them.
8513 o Use a tor_assert macro that logs failed assertions too.
8516 Changes in version 0.0.6pre5 - 2004-04-18
8517 o changes from 0.0.6pre4:
8518 - make tor build on broken freebsd 5.2 installs
8519 - fix a failed assert when you try an intro point, get a nack, and try
8520 a second one and it works.
8521 - when alice uses a port that the hidden service doesn't accept,
8522 it now sends back an end cell (denied by exit policy). otherwise
8523 alice would just have to wait to time out.
8524 - fix another rare bug: when we had tried all the intro
8525 points for a hidden service, we fetched the descriptor
8526 again, but we left our introcirc thinking it had already
8527 sent an intro, so it kept waiting for a response...
8528 - bugfix: when you sleep your hidden-service laptop, as soon
8529 as it wakes up it tries to upload a service descriptor, but
8530 socketpair fails for some reason (localhost not up yet?).
8531 now we simply give up on that upload, and we'll try again later.
8532 i'd still like to find the bug though.
8533 - if an intro circ waiting for an ack dies before getting one, then
8535 - we were reusing stale service descriptors and refetching usable
8539 Changes in version 0.0.6pre4 - 2004-04-14
8540 o changes from 0.0.6pre3:
8541 - when bob fails to connect to the rendezvous point, and his
8542 circ didn't fail because of the rendezvous point itself, then
8543 he retries a couple of times
8544 - we expire introduction and rendezvous circs more thoroughly
8545 (sometimes they were hanging around forever)
8546 - we expire unattached rendezvous streams that have been around
8547 too long (they were sticking around forever).
8548 - fix a measly fencepost error that was crashing everybody with
8552 Changes in version 0.0.6pre3 - 2004-04-14
8553 o changes from 0.0.6pre2:
8554 - make hup work again
8555 - fix some memory leaks for dirservers
8556 - allow more skew in rendezvous descriptor timestamps, to help
8557 handle people like blanu who don't know what time it is
8558 - normal circs are 3 hops, but some rend/intro circs are 4, if
8559 the initiator doesn't get to choose the last hop
8560 - send acks for introductions, so alice can know whether to try
8562 - bob publishes intro points more correctly
8563 o changes from 0.0.5:
8564 - fix an assert trigger that's been plaguing us since the days
8565 of 0.0.2prexx (thanks weasel!)
8566 - retry stream correctly when we fail to connect because of
8567 exit-policy-reject (should try another) or can't-resolve-address
8568 (also should try another, because dns on random internet servers
8570 - when we hup a dirserver and we've *removed* a server from the
8571 approved-routers list, now we remove that server from the
8572 in-memory directories too
8575 Changes in version 0.0.6pre2 - 2004-04-08
8576 o We fixed our base32 implementation. Now it works on all architectures.
8579 Changes in version 0.0.6pre1 - 2004-04-08
8581 - Hidden services and rendezvous points are implemented. Go to
8582 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
8583 hidden services. (This only works via a socks4a proxy such as
8584 Privoxy, and currently it's quite slow.)
8587 Changes in version 0.0.5 - 2004-03-30
8591 Changes in version 0.0.5rc3 - 2004-03-29
8592 o Install torrc as torrc.sample -- we no longer clobber your
8594 o Re-enable recommendedversion checking (we broke it in rc2, oops)
8595 o Add in a 'notice' log level for things the operator should hear
8596 but that aren't warnings
8599 Changes in version 0.0.5rc2 - 2004-03-29
8600 o Hold socks connection open until reply is flushed (if possible)
8601 o Make exit nodes resolve IPs to IPs immediately, rather than asking
8602 the dns farm to do it.
8603 o Fix c99 aliasing warnings in rephist.c
8604 o Don't include server descriptors that are older than 24 hours in the
8606 o Give socks 'reject' replies their whole 15s to attempt to flush,
8607 rather than seeing the 60s timeout and assuming the flush had failed.
8608 o Clean automake droppings from the cvs repository
8611 Changes in version 0.0.5rc1 - 2004-03-28
8612 o Fix mangled-state bug in directory fetching (was causing sigpipes).
8613 o Only build circuits after we've fetched the directory: clients were
8614 using only the directory servers before they'd fetched a directory.
8615 This also means longer startup time; so it goes.
8616 o Fix an assert trigger where an OP would fail to handshake, and we'd
8617 expect it to have a nickname.
8618 o Work around a tsocks bug: do a socks reject when AP connection dies
8619 early, else tsocks goes into an infinite loop.
8622 Changes in version 0.0.4 - 2004-03-26
8623 o When connecting to a dirserver or OR and the network is down,
8627 Changes in version 0.0.3 - 2004-03-26
8628 o Warn and fail if server chose a nickname with illegal characters
8629 o Port to Solaris and Sparc:
8630 - include missing header fcntl.h
8631 - have autoconf find -lsocket -lnsl automatically
8632 - deal with hardware word alignment
8633 - make uname() work (solaris has a different return convention)
8634 - switch from using signal() to sigaction()
8635 o Preliminary work on reputation system:
8636 - Keep statistics on success/fail of connect attempts; they're published
8637 by kill -USR1 currently.
8638 - Add a RunTesting option to try to learn link state by creating test
8639 circuits, even when SocksPort is off.
8640 - Remove unused open circuits when there are too many.
8643 Changes in version 0.0.2 - 2004-03-19
8644 - Include strlcpy and strlcat for safer string ops
8645 - define INADDR_NONE so we compile (but still not run) on solaris
8648 Changes in version 0.0.2pre27 - 2004-03-14
8650 - Allow internal tor networks (we were rejecting internal IPs,
8651 now we allow them if they're set explicitly).
8652 - And fix a few endian issues.
8655 Changes in version 0.0.2pre26 - 2004-03-14
8657 - If a stream times out after 15s without a connected cell, don't
8658 try that circuit again: try a new one.
8659 - Retry streams at most 4 times. Then give up.
8660 - When a dirserver gets a descriptor from an unknown router, it
8661 logs its fingerprint (so the dirserver operator can choose to
8662 accept it even without mail from the server operator).
8663 - Inform unapproved servers when we reject their descriptors.
8664 - Make tor build on Windows again. It works as a client, who knows
8666 - Clearer instructions in the torrc for how to set up a server.
8667 - Be more efficient about reading fd's when our global token bucket
8668 (used for rate limiting) becomes empty.
8670 - Stop asserting that computers always go forward in time. It's
8672 - When we sent a cell (e.g. destroy) and then marked an OR connection
8673 expired, we might close it before finishing a flush if the other
8674 side isn't reading right then.
8675 - Don't allow dirservers to start if they haven't defined
8677 - We were caching transient dns failures. Oops.
8678 - Prevent servers from publishing an internal IP as their address.
8679 - Address a strcat vulnerability in circuit.c
8682 Changes in version 0.0.2pre25 - 2004-03-04
8684 - Put the OR's IP in its router descriptor, not its fqdn. That way
8685 we'll stop being stalled by gethostbyname for nodes with flaky dns,
8688 - If the user typed in an address that didn't resolve, the server
8692 Changes in version 0.0.2pre24 - 2004-03-03
8694 - Fix an assertion failure in dns.c, where we were trying to dequeue
8695 a pending dns resolve even if it wasn't pending
8696 - Fix a spurious socks5 warning about still trying to write after the
8697 connection is finished.
8698 - Hold certain marked_for_close connections open until they're finished
8699 flushing, rather than losing bytes by closing them too early.
8700 - Correctly report the reason for ending a stream
8701 - Remove some duplicate calls to connection_mark_for_close
8702 - Put switch_id and start_daemon earlier in the boot sequence, so it
8703 will actually try to chdir() to options.DataDirectory
8704 - Make 'make test' exit(1) if a test fails; fix some unit tests
8705 - Make tor fail when you use a config option it doesn't know about,
8706 rather than warn and continue.
8707 - Make --version work
8708 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
8711 Changes in version 0.0.2pre23 - 2004-02-29
8713 - Print a statement when the first circ is finished, so the user
8715 - If a relay cell is unrecognized at the end of the circuit,
8716 send back a destroy. (So attacks to mutate cells are more
8718 - New config option 'excludenodes' to avoid certain nodes for circuits.
8719 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
8720 so you can collect coredumps there.
8722 - Fix a bug in tls flushing where sometimes data got wedged and
8723 didn't flush until more data got sent. Hopefully this bug was
8724 a big factor in the random delays we were seeing.
8725 - Make 'connected' cells include the resolved IP, so the client
8726 dns cache actually gets populated.
8727 - Disallow changing from ORPort=0 to ORPort>0 on hup.
8728 - When we time-out on a stream and detach from the circuit, send an
8729 end cell down it first.
8730 - Only warn about an unknown router (in exitnodes, entrynodes,
8731 excludenodes) after we've fetched a directory.
8734 Changes in version 0.0.2pre22 - 2004-02-26
8736 - Servers publish less revealing uname information in descriptors.
8737 - More memory tracking and assertions, to crash more usefully when
8739 - If the default torrc isn't there, just use some default defaults.
8740 Plus provide an internal dirservers file if they don't have one.
8741 - When the user tries to use Tor as an http proxy, give them an http
8742 501 failure explaining that we're a socks proxy.
8743 - Dump a new router.desc on hup, to help confused people who change
8744 their exit policies and then wonder why router.desc doesn't reflect
8746 - Clean up the generic tor.sh init script that we ship with.
8748 - If the exit stream is pending on the resolve, and a destroy arrives,
8749 then the stream wasn't getting removed from the pending list. I
8750 think this was the one causing recent server crashes.
8751 - Use a more robust poll on OSX 10.3, since their poll is flaky.
8752 - When it couldn't resolve any dirservers, it was useless from then on.
8753 Now it reloads the RouterFile (or default dirservers) if it has no
8755 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
8756 many users don't even *have* a /usr/local/sbin/.
8759 Changes in version 0.0.2pre21 - 2004-02-18
8761 - There's a ChangeLog file that actually reflects the changelog.
8762 - There's a 'torify' wrapper script, with an accompanying
8763 tor-tsocks.conf, that simplifies the process of using tsocks for
8764 tor. It even has a man page.
8765 - The tor binary gets installed to sbin rather than bin now.
8766 - Retry streams where the connected cell hasn't arrived in 15 seconds
8767 - Clean up exit policy handling -- get the default out of the torrc,
8768 so we can update it without forcing each server operator to fix
8770 - Allow imaps and pop3s in default exit policy
8772 - Prevent picking middleman nodes as the last node in the circuit
8775 Changes in version 0.0.2pre20 - 2004-01-30
8777 - We now have a deb package, and it's in debian unstable. Go to
8779 - I've split the TotalBandwidth option into BandwidthRate (how many
8780 bytes per second you want to allow, long-term) and
8781 BandwidthBurst (how many bytes you will allow at once before the cap
8782 kicks in). This better token bucket approach lets you, say, set
8783 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
8784 performance while not exceeding your monthly bandwidth quota.
8785 - Push out a tls record's worth of data once you've got it, rather
8786 than waiting until you've read everything waiting to be read. This
8787 may improve performance by pipelining better. We'll see.
8788 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
8789 from failed circuits (if they haven't been connected yet) and attach
8791 - Expire old streams that haven't managed to connect. Some day we'll
8792 have them reattach to new circuits instead.
8795 - Fix several memory leaks that were causing servers to become bloated
8797 - Fix a few very rare assert triggers. A few more remain.
8798 - Setuid to User _before_ complaining about running as root.
8801 Changes in version 0.0.2pre19 - 2004-01-07
8803 - Fix deadlock condition in dns farm. We were telling a child to die by
8804 closing the parent's file descriptor to him. But newer children were
8805 inheriting the open file descriptor from the parent, and since they
8806 weren't closing it, the socket never closed, so the child never read
8807 eof, so he never knew to exit. Similarly, dns workers were holding
8808 open other sockets, leading to all sorts of chaos.
8809 - New cleaner daemon() code for forking and backgrounding.
8810 - If you log to a file, it now prints an entry at the top of the
8811 logfile so you know it's working.
8812 - The onionskin challenge length was 30 bytes longer than necessary.
8813 - Started to patch up the spec so it's not quite so out of date.
8816 Changes in version 0.0.2pre18 - 2004-01-02
8818 - Fix endian issues with the 'integrity' field in the relay header.
8819 - Fix a potential bug where connections in state
8820 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
8823 Changes in version 0.0.2pre17 - 2003-12-30
8825 - Made --debuglogfile (or any second log file, actually) work.
8826 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
8827 adversary could force us into an infinite loop.
8830 - Each onionskin handshake now includes a hash of the computed key,
8831 to prove the server's identity and help perfect forward secrecy.
8832 - Changed cell size from 256 to 512 bytes (working toward compatibility
8834 - Changed cell length to 2 bytes, and moved it to the relay header.
8835 - Implemented end-to-end integrity checking for the payloads of
8837 - Separated streamid from 'recognized' (otherwise circuits will get
8838 messed up when we try to have streams exit from the middle). We
8839 use the integrity-checking to confirm that a cell is addressed to
8841 - Randomize the initial circid and streamid values, so an adversary who
8842 breaks into a node can't learn how many circuits or streams have
8846 Changes in version 0.0.2pre16 - 2003-12-14
8848 - Fixed a bug that made HUP trigger an assert
8849 - Fixed a bug where a circuit that immediately failed wasn't being
8850 counted as a failed circuit in counting retries.
8853 - Now we close the circuit when we get a truncated cell: otherwise we're
8854 open to an anonymity attack where a bad node in the path truncates
8855 the circuit and then we open streams at him.
8856 - Add port ranges to exit policies
8857 - Add a conservative default exit policy
8858 - Warn if you're running tor as root
8859 - on HUP, retry OR connections and close/rebind listeners
8860 - options.EntryNodes: try these nodes first when picking the first node
8861 - options.ExitNodes: if your best choices happen to include any of
8862 your preferred exit nodes, you choose among just those preferred
8864 - options.ExcludedNodes: nodes that are never picked in path building
8867 Changes in version 0.0.2pre15 - 2003-12-03
8868 o Robustness and bugfixes:
8869 - Sometimes clients would cache incorrect DNS resolves, which would
8870 really screw things up.
8871 - An OP that goes offline would slowly leak all its sockets and stop
8873 - A wide variety of bugfixes in exit node selection, exit policy
8874 handling, and processing pending streams when a new circuit is
8876 - Pick nodes for a path only from those the directory says are up
8877 - Choose randomly from all running dirservers, not always the first one
8878 - Increase allowed http header size for directory fetch.
8879 - Stop writing to stderr (if we're daemonized it will be closed).
8880 - Enable -g always, so cores will be more useful to me.
8881 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
8884 - Wrote a man page. It lists commonly used options.
8887 - Change default loglevel to warn.
8888 - Make PidFile default to null rather than littering in your CWD.
8889 - OnionRouter config option is now obsolete. Instead it just checks
8891 - Moved to a single unified torrc file for both clients and servers.
8894 Changes in version 0.0.2pre14 - 2003-11-29
8895 o Robustness and bugfixes:
8896 - Force the admin to make the DataDirectory himself
8897 - to get ownership/permissions right
8898 - so clients no longer make a DataDirectory and then never use it
8899 - fix bug where a client who was offline for 45 minutes would never
8900 pull down a directory again
8901 - fix (or at least hide really well) the dns assert bug that was
8902 causing server crashes
8903 - warnings and improved robustness wrt clockskew for certs
8904 - use the native daemon(3) to daemonize, when available
8905 - exit if bind() fails
8906 - exit if neither socksport nor orport is defined
8907 - include our own tor_timegm (Win32 doesn't have its own)
8908 - bugfix for win32 with lots of connections
8909 - fix minor bias in PRNG
8910 - make dirserver more robust to corrupt cached directory
8913 - Wrote the design document (woo)
8915 o Circuit building and exit policies:
8916 - Circuits no longer try to use nodes that the directory has told them
8918 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
8919 bitcounts (18.0.0.0/8).
8920 - Make AP connections standby for a circuit if no suitable circuit
8921 exists, rather than failing
8922 - Circuits choose exit node based on addr/port, exit policies, and
8923 which AP connections are standing by
8924 - Bump min pathlen from 2 to 3
8925 - Relay end cells have a payload to describe why the stream ended.
8926 - If the stream failed because of exit policy, try again with a new
8928 - Clients have a dns cache to remember resolved addresses.
8929 - Notice more quickly when we have no working circuits
8932 - APPort is now called SocksPort
8933 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
8935 - RecommendedVersions is now a config variable rather than
8936 hardcoded (for dirservers)
8937 - Reloads config on HUP
8938 - Usage info on -h or --help
8939 - If you set User and Group config vars, it'll setu/gid to them.
8942 Changes in version 0.0.2pre13 - 2003-10-19
8943 o General stability:
8944 - SSL_write no longer fails when it returns WANTWRITE and the number
8945 of bytes in the buf has changed by the next SSL_write call.
8946 - Fix segfault fetching directory when network is down
8947 - Fix a variety of minor memory leaks
8948 - Dirservers reload the fingerprints file on HUP, so I don't have
8949 to take down the network when I approve a new router
8950 - Default server config file has explicit Address line to specify fqdn
8953 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
8954 - Make listener connections not ever alloc bufs
8956 o Autoconf improvements:
8957 - don't clobber an external CFLAGS in ./configure
8958 - Make install now works
8959 - create var/lib/tor on make install
8960 - autocreate a tor.sh initscript to help distribs
8961 - autocreate the torrc and sample-server-torrc with correct paths
8963 o Log files and Daemonizing now work:
8964 - If --DebugLogFile is specified, log to it at -l debug
8965 - If --LogFile is specified, use it instead of commandline
8966 - If --RunAsDaemon is set, tor forks and backgrounds on startup