1 Changes in version 0.2.2.7-alpha - 2009-??-??
3 - New config option "CircuitStreamTimeout" to override our internal
4 timeout schedule for how many seconds until we detach a stream from
5 a circuit and try a new circuit. If your network is particularly
6 slow, you might want to set this to a number like 60.
9 - Fix compilation on OSX 10.3, which has a stub mlockall() but
10 hides it. Bugfix on 0.2.2.6-alpha.
11 - After we free an internal connection structure, overwrite it
12 with a different memory value than we use for overwriting a freed
13 internal circuit structure. Should help with debugging. Suggested
15 - Fix an instance where a Tor directory mirror might accidentally
16 log the IP address of a misbehaving Tor client. Bugfix on
20 Changes in version 0.2.2.6-alpha - 2009-11-19
22 - Directory authorities can now create, vote on, and serve multiple
23 parallel formats of directory data as part of their voting process.
24 Partially implements Proposal 162: "Publish the consensus in
26 - Directory authorities can now agree on and publish small summaries
27 of router information that clients can use in place of regular
28 server descriptors. This transition will eventually allow clients
29 to use far less bandwidth for downloading information about the
30 network. Begins the implementation of Proposal 158: "Clients
31 download consensus + microdescriptors".
32 - The directory voting system is now extensible to use multiple hash
33 algorithms for signatures and resource selection. Newer formats
34 are signed with SHA256, with a possibility for moving to a better
35 hash algorithm in the future.
36 - New DisableAllSwap option. If set to 1, Tor will attempt to lock all
37 current and future memory pages via mlockall(). On supported
38 platforms (modern Linux and probably BSD but not Windows or OS X),
39 this should effectively disable any and all attempts to page out
40 memory. This option requires that you start your Tor as root --
41 if you use DisableAllSwap, please consider using the User option
42 to properly reduce the privileges of your Tor.
43 - Numerous changes, bugfixes, and workarounds from Nathan Freitas
44 to help Tor build correctly for Android phones.
47 - Work around a security feature in OpenSSL 0.9.8l that prevents our
48 handshake from working unless we explicitly tell OpenSSL that we
49 are using SSL renegotiation safely. We are, but OpenSSL 0.9.8l
50 won't work unless we say we are.
53 - Fix a crash bug when trying to initialize the evdns module in
54 Libevent 2. Bugfix on 0.2.1.16-rc.
55 - Stop logging at severity 'warn' when some other Tor client tries
56 to establish a circuit with us using weak DH keys. It's a protocol
57 violation, but that doesn't mean ordinary users need to hear about
58 it. Fixes the bug part of bug 1114. Bugfix on 0.1.0.13.
59 - Do not refuse to learn about authority certs and v2 networkstatus
60 documents that are older than the latest consensus. This bug might
61 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
62 Spotted and fixed by xmux.
63 - Fix numerous small code-flaws found by Coverity Scan Rung 3.
64 - If all authorities restart at once right before a consensus vote,
65 nobody will vote about "Running", and clients will get a consensus
66 with no usable relays. Instead, authorities refuse to build a
67 consensus if this happens. Bugfix on 0.2.0.10-alpha; fixes bug 1066.
68 - If your relay can't keep up with the number of incoming create
69 cells, it would log one warning per failure into your logs. Limit
70 warnings to 1 per minute. Bugfix on 0.0.2pre10; fixes bug 1042.
71 - Bridges now use "reject *:*" as their default exit policy. Bugfix
72 on 0.2.0.3-alpha; fixes bug 1113.
73 - Fix a memory leak on directory authorities during voting that was
74 introduced in 0.2.2.1-alpha. Found via valgrind.
77 Changes in version 0.2.2.5-alpha - 2009-10-11
78 Tor 0.2.2.5-alpha fixes a few compile problems in 0.2.2.4-alpha.
81 - Make the tarball compile again. Oops. Bugfix on 0.2.2.4-alpha.
83 o New directory authorities:
84 - Move dizum to an alternate IP address.
87 Changes in version 0.2.2.4-alpha - 2009-10-10
88 Tor 0.2.2.4-alpha fixes more crash bugs in 0.2.2.2-alpha. It also
89 introduces a new unit test framework, shifts directry authority
90 addresses around to reduce the impact from recent blocking events,
91 and fixes a few smaller bugs.
94 - Fix several more asserts in the circuit_build_times code, for
95 example one that causes Tor to fail to start once we have
96 accumulated 5000 build times in the state file. Bugfixes on
97 0.2.2.2-alpha; fixes bug 1108.
99 o New directory authorities:
100 - Move moria1 and Tonga to alternate IP addresses.
103 - Log SSL state transitions at debug level during handshake, and
104 include SSL states in error messages. This may help debug future
105 SSL handshake issues.
106 - Add a new "Handshake" log domain for activities that happen
107 during the TLS handshake.
108 - Revert to the "June 3 2009" ip-to-country file. The September one
109 seems to have removed most US IP addresses.
110 - Directory authorities now reject Tor relays with versions less than
111 0.1.2.14. This step cuts out four relays from the current network,
112 none of which are very big.
115 - Fix a couple of smaller issues with gathering statistics. Bugfixes
117 - Fix two memory leaks in the error case of
118 circuit_build_times_parse_state(). Bugfix on 0.2.2.2-alpha.
119 - Don't count one-hop circuits when we're estimating how long it
120 takes circuits to build on average. Otherwise we'll set our circuit
121 build timeout lower than we should. Bugfix on 0.2.2.2-alpha.
122 - Directory authorities no longer change their opinion of, or vote on,
123 whether a router is Running, unless they have themselves been
124 online long enough to have some idea. Bugfix on 0.2.0.6-alpha.
127 o Code simplifications and refactoring:
128 - Revise our unit tests to use the "tinytest" framework, so we
129 can run tests in their own processes, have smarter setup/teardown
130 code, and so on. The unit test code has moved to its own
131 subdirectory, and has been split into multiple modules.
134 Changes in version 0.2.2.3-alpha - 2009-09-23
135 Tor 0.2.2.3-alpha fixes a few crash bugs in 0.2.2.2-alpha.
138 - Fix an overzealous assert in our new circuit build timeout code.
139 Bugfix on 0.2.2.2-alpha; fixes bug 1103.
142 - If the networkstatus consensus tells us that we should use a
143 negative circuit package window, ignore it. Otherwise we'll
144 believe it and then trigger an assert. Bugfix on 0.2.2.2-alpha.
147 Changes in version 0.2.2.2-alpha - 2009-09-21
148 Tor 0.2.2.2-alpha introduces our latest performance improvement for
149 clients: Tor tracks the average time it takes to build a circuit, and
150 avoids using circuits that take too long to build. For fast connections,
151 this feature can cut your expected latency in half. For slow or flaky
152 connections, it could ruin your Tor experience. Let us know if it does!
155 - Tor now tracks how long it takes to build client-side circuits
156 over time, and adapts its timeout to local network performance.
157 Since a circuit that takes a long time to build will also provide
158 bad performance, we get significant latency improvements by
159 discarding the slowest 20% of circuits. Specifically, Tor creates
160 circuits more aggressively than usual until it has enough data
161 points for a good timeout estimate. Implements proposal 151.
162 We are especially looking for reports (good and bad) from users with
163 both EDGE and broadband connections that can move from broadband
164 to EDGE and find out if the build-time data in the .tor/state gets
165 reset without loss of Tor usability. You should also see a notice
166 log message telling you that Tor has reset its timeout.
167 - Directory authorities can now vote on arbitary integer values as
168 part of the consensus process. This is designed to help set
169 network-wide parameters. Implements proposal 167.
170 - Tor now reads the "circwindow" parameter out of the consensus,
171 and uses that value for its circuit package window rather than the
172 default of 1000 cells. Begins the implementation of proposal 168.
175 - Fix a remotely triggerable memory leak when a consensus document
176 contains more than one signature from the same voter. Bugfix on
180 - Fix an extremely rare infinite recursion bug that could occur if
181 we tried to log a message after shutting down the log subsystem.
182 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
183 - Fix parsing for memory or time units given without a space between
184 the number and the unit. Bugfix on 0.2.2.1-alpha; fixes bug 1076.
185 - A networkstatus vote must contain exactly one signature. Spec
186 conformance issue. Bugfix on 0.2.0.3-alpha.
187 - Fix an obscure bug where hidden services on 64-bit big-endian
188 systems might mis-read the timestamp in v3 introduce cells, and
189 refuse to connect back to the client. Discovered by "rotor".
190 Bugfix on 0.2.1.6-alpha.
191 - We were triggering a CLOCK_SKEW controller status event whenever
192 we connect via the v2 connection protocol to any relay that has
193 a wrong clock. Instead, we should only inform the controller when
194 it's a trusted authority that claims our clock is wrong. Bugfix
195 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
196 - We were telling the controller about CHECKING_REACHABILITY and
197 REACHABILITY_FAILED status events whenever we launch a testing
198 circuit or notice that one has failed. Instead, only tell the
199 controller when we want to inform the user of overall success or
200 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
202 - Don't warn when we're using a circuit that ends with a node
203 excluded in ExcludeExitNodes, but the circuit is not used to access
204 the outside world. This should help fix bug 1090, but more problems
205 remain. Bugfix on 0.2.1.6-alpha.
206 - Work around a small memory leak in some versions of OpenSSL that
207 stopped the memory used by the hostname TLS extension from being
209 - Make our 'torify' script more portable; if we have only one of
210 'torsocks' or 'tsocks' installed, don't complain to the user;
211 and explain our warning about tsocks better.
214 - Add a "getinfo status/accepted-server-descriptor" controller
215 command, which is the recommended way for controllers to learn
216 whether our server descriptor has been successfully received by at
217 least on directory authority. Un-recommend good-server-descriptor
218 getinfo and status events until we have a better design for them.
219 - Update to the "September 4 2009" ip-to-country file.
222 Changes in version 0.2.2.1-alpha - 2009-08-26
223 Tor 0.2.2.1-alpha disables ".exit" address notation by default, allows
224 Tor clients to bootstrap on networks where only port 80 is reachable,
225 makes it more straightforward to support hardware crypto accelerators,
226 and starts the groundwork for gathering stats safely at relays.
229 - Start the process of disabling ".exit" address notation, since it
230 can be used for a variety of esoteric application-level attacks
231 on users. To reenable it, set "AllowDotExit 1" in your torrc. Fix
234 o New directory authorities:
235 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
239 - New AccelName and AccelDir options add support for dynamic OpenSSL
240 hardware crypto acceleration engines.
241 - Tor now supports tunneling all of its outgoing connections over
242 a SOCKS proxy, using the SOCKS4Proxy and/or SOCKS5Proxy
243 configuration options. Code by Christopher Davis.
246 - Send circuit or stream sendme cells when our window has decreased
247 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
248 by Karsten when testing the "reduce circuit window" performance
249 patch. Bugfix on the 54th commit on Tor -- from July 2002,
250 before the release of Tor 0.0.0. This is the new winner of the
253 o New options for gathering stats safely:
254 - Directories that set "DirReqStatistics 1" write statistics on
255 directory request to disk every 24 hours. As compared to the
256 --enable-geoip-stats flag in 0.2.1.x, there are a few improvements:
257 1) stats are written to disk exactly every 24 hours; 2) estimated
258 shares of v2 and v3 requests are determined as mean values, not at
259 the end of a measurement period; 3) unresolved requests are listed
260 with country code '??'; 4) directories also measure download times.
261 - Exit nodes that set "ExitPortStatistics 1" write statistics on the
262 number of exit streams and transferred bytes per port to disk every
264 - Relays that set "CellStatistics 1" write statistics on how long
265 cells spend in their circuit queues to disk every 24 hours.
266 - Entry nodes that set "EntryStatistics 1" write statistics on the
267 rough number and origins of connecting clients to disk every 24
269 - Relays that write any of the above statistics to disk and set
270 "ExtraInfoStatistics 1" include the past 24 hours of statistics in
271 their extra-info documents.
274 - New --digests command-line switch to output the digests of the
275 source files Tor was built with.
276 - The "torify" script now uses torsocks where available.
277 - The memarea code now uses a sentinel value at the end of each area
278 to make sure nothing writes beyond the end of an area. This might
279 help debug some conceivable causes of bug 930.
280 - Time and memory units in the configuration file can now be set to
281 fractional units. For example, "2.5 GB" is now a valid value for
283 - Certain Tor clients (such as those behind check.torproject.org) may
284 want to fetch the consensus in an extra early manner. To enable this
285 a user may now set FetchDirInfoExtraEarly to 1. This also depends on
286 setting FetchDirInfoEarly to 1. Previous behavior will stay the same
287 as only certain clients who must have this information sooner should
289 - Instead of adding the svn revision to the Tor version string, report
290 the git commit (when we're building from a git checkout).
293 - If any the v3 certs we download are unparseable, we should actually
294 notice the failure so we don't retry indefinitely. Bugfix on
295 0.2.0.x; reported by "rotator".
296 - If the cached cert file is unparseable, warn but don't exit.
297 - Fix possible segmentation fault on directory authorities. Bugfix on
299 - When Tor fails to parse a descriptor of any kind, dump it to disk.
300 Might help diagnosing bug 1051.
302 o Deprecated and removed features:
303 - The controller no longer accepts the old obsolete "addr-mappings/"
304 or "unregistered-servers-" GETINFO values.
305 - Hidden services no longer publish version 0 descriptors, and clients
306 do not request or use version 0 descriptors. However, the old hidden
307 service authorities still accept and serve version 0 descriptors
308 when contacted by older hidden services/clients.
309 - The EXTENDED_EVENTS and VERBOSE_NAMES controller features are now
310 always on; using them is necessary for correct forward-compatible
312 - Remove support for .noconnect style addresses. Nobody was using
313 them, and they provided another avenue for detecting Tor users
314 via application-level web tricks.
317 - Upgrade Vidalia from 0.1.15 to 0.2.3 in the Windows and OS X
318 installer bundles. See
319 https://trac.vidalia-project.net/browser/vidalia/tags/vidalia-0.2.3/CHANGELOG
320 for details of what's new in Vidalia 0.2.3.
321 - Windows Vidalia Bundle: update Privoxy from 3.0.6 to 3.0.14-beta.
322 - OS X Vidalia Bundle: move to Polipo 1.0.4 with Tor specific
323 configuration file, rather than the old Privoxy.
324 - OS X Vidalia Bundle: Vidalia, Tor, and Polipo are compiled as
325 x86-only for better compatibility with OS X 10.6, aka Snow Leopard.
326 - OS X Tor Expert Bundle: Tor is compiled as x86-only for
327 better compatibility with OS X 10.6, aka Snow Leopard.
328 - OS X Vidalia Bundle: The multi-package installer is now replaced
329 by a simple drag and drop to the /Applications folder. This change
330 occurred with the upgrade to Vidalia 0.2.3.
333 Changes in Version 0.2.1.21 - 20??-??-??
335 - Work around a security feature in OpenSSL 0.9.8l that prevents our
336 handshake from working unless we explicitly tell OpenSSL that we are
337 using SSL renegotiation safely. We are, of course, but OpenSSL
338 0.9.8l won't work unless we say we are.
341 - Do not refuse to learn about authority certs and v2 networkstatus
342 documents that are older than the latest consensus. This bug might
343 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
344 Spotted and fixed by xmux.
345 - Fix a couple of very-hard-to-trigger memory leaks, and one hard-to-
346 trigger platform-specific option misparsing case found by Coverity
350 Changes in version 0.2.1.20 - 2009-10-15
351 Tor 0.2.1.20 fixes a crash bug when you're accessing many hidden
352 services at once, prepares for more performance improvements, and
353 fixes a bunch of smaller bugs.
355 The Windows and OS X bundles also include a more recent Vidalia,
356 and switch from Privoxy to Polipo.
358 The OS X installers are now drag and drop. It's best to un-install
359 Tor/Vidalia and then install this new bundle, rather than upgrade. If
360 you want to upgrade, you'll need to update the paths for Tor and Polipo
361 in the Vidalia Settings window.
364 - Send circuit or stream sendme cells when our window has decreased
365 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
366 by Karsten when testing the "reduce circuit window" performance
367 patch. Bugfix on the 54th commit on Tor -- from July 2002,
368 before the release of Tor 0.0.0. This is the new winner of the
370 - Fix a remotely triggerable memory leak when a consensus document
371 contains more than one signature from the same voter. Bugfix on
373 - Avoid segfault in rare cases when finishing an introduction circuit
374 as a client and finding out that we don't have an introduction key
375 for it. Fixes bug 1073. Reported by Aaron Swartz.
378 - Tor now reads the "circwindow" parameter out of the consensus,
379 and uses that value for its circuit package window rather than the
380 default of 1000 cells. Begins the implementation of proposal 168.
382 o New directory authorities:
383 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
385 - Move moria1 and tonga to alternate IP addresses.
388 - Fix a signed/unsigned compile warning in 0.2.1.19.
389 - Fix possible segmentation fault on directory authorities. Bugfix on
391 - Fix an extremely rare infinite recursion bug that could occur if
392 we tried to log a message after shutting down the log subsystem.
393 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
394 - Fix an obscure bug where hidden services on 64-bit big-endian
395 systems might mis-read the timestamp in v3 introduce cells, and
396 refuse to connect back to the client. Discovered by "rotor".
397 Bugfix on 0.2.1.6-alpha.
398 - We were triggering a CLOCK_SKEW controller status event whenever
399 we connect via the v2 connection protocol to any relay that has
400 a wrong clock. Instead, we should only inform the controller when
401 it's a trusted authority that claims our clock is wrong. Bugfix
402 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
403 - We were telling the controller about CHECKING_REACHABILITY and
404 REACHABILITY_FAILED status events whenever we launch a testing
405 circuit or notice that one has failed. Instead, only tell the
406 controller when we want to inform the user of overall success or
407 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
409 - Don't warn when we're using a circuit that ends with a node
410 excluded in ExcludeExitNodes, but the circuit is not used to access
411 the outside world. This should help fix bug 1090. Bugfix on
413 - Work around a small memory leak in some versions of OpenSSL that
414 stopped the memory used by the hostname TLS extension from being
418 - Add a "getinfo status/accepted-server-descriptor" controller
419 command, which is the recommended way for controllers to learn
420 whether our server descriptor has been successfully received by at
421 least on directory authority. Un-recommend good-server-descriptor
422 getinfo and status events until we have a better design for them.
425 Changes in version 0.2.1.19 - 2009-07-28
426 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
427 services on Tor 0.2.1.3-alpha through 0.2.1.18.
430 - Make accessing hidden services on 0.2.1.x work right again.
431 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
432 part of patch provided by "optimist".
435 - When a relay/bridge is writing out its identity key fingerprint to
436 the "fingerprint" file and to its logs, write it without spaces. Now
437 it will look like the fingerprints in our bridges documentation,
438 and confuse fewer users.
441 - Relays no longer publish a new server descriptor if they change
442 their MaxAdvertisedBandwidth config option but it doesn't end up
443 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
444 fixes bug 1026. Patch from Sebastian.
445 - Avoid leaking memory every time we get a create cell but we have
446 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
447 fixes bug 1034. Reported by BarkerJr.
450 Changes in version 0.2.1.18 - 2009-07-24
451 Tor 0.2.1.18 lays the foundations for performance improvements,
452 adds status events to help users diagnose bootstrap problems, adds
453 optional authentication/authorization for hidden services, fixes a
454 variety of potential anonymity problems, and includes a huge pile of
455 other features and bug fixes.
458 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
461 Changes in version 0.2.1.17-rc - 2009-07-07
462 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
463 candidate for the 0.2.1.x series. It lays the groundwork for further
464 client performance improvements, and also fixes a big bug with directory
465 authorities that were causing them to assign Guard and Stable flags
468 The Windows bundles also finally include the geoip database that we
469 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
470 should actually install Torbutton rather than giving you a cryptic
471 failure message (oops).
474 - Clients now use the bandwidth values in the consensus, rather than
475 the bandwidth values in each relay descriptor. This approach opens
476 the door to more accurate bandwidth estimates once the directory
477 authorities start doing active measurements. Implements more of
481 - When Tor clients restart after 1-5 days, they discard all their
482 cached descriptors as too old, but they still use the cached
483 consensus document. This approach is good for robustness, but
484 bad for performance: since they don't know any bandwidths, they
485 end up choosing at random rather than weighting their choice by
486 speed. Fixed by the above feature of putting bandwidths in the
487 consensus. Bugfix on 0.2.0.x.
488 - Directory authorities were neglecting to mark relays down in their
489 internal histories if the relays fall off the routerlist without
490 ever being found unreachable. So there were relays in the histories
491 that haven't been seen for eight months, and are listed as being
492 up for eight months. This wreaked havoc on the "median wfu"
493 and "median mtbf" calculations, in turn making Guard and Stable
494 flags very wrong, hurting network performance. Fixes bugs 696 and
495 969. Bugfix on 0.2.0.6-alpha.
498 - Serve the DirPortFrontPage page even when we have been approaching
499 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
500 - The control port would close the connection before flushing long
501 replies, such as the network consensus, if a QUIT command was issued
502 before the reply had completed. Now, the control port flushes all
503 pending replies before closing the connection. Also fixed a spurious
504 warning when a QUIT command is issued after a malformed or rejected
505 AUTHENTICATE command, but before the connection was closed. Patch
506 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
507 - When we can't find an intro key for a v2 hidden service descriptor,
508 fall back to the v0 hidden service descriptor and log a bug message.
509 Workaround for bug 1024.
510 - Fix a log message that did not respect the SafeLogging option.
514 - If we're a relay and we change our IP address, be more verbose
515 about the reason that made us change. Should help track down
516 further bugs for relays on dynamic IP addresses.
519 Changes in version 0.2.0.35 - 2009-06-24
521 - Avoid crashing in the presence of certain malformed descriptors.
522 Found by lark, and by automated fuzzing.
523 - Fix an edge case where a malicious exit relay could convince a
524 controller that the client's DNS question resolves to an internal IP
525 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
528 - Finally fix the bug where dynamic-IP relays disappear when their
529 IP address changes: directory mirrors were mistakenly telling
530 them their old address if they asked via begin_dir, so they
531 never got an accurate answer about their new address, so they
532 just vanished after a day. For belt-and-suspenders, relays that
533 don't set Address in their config now avoid using begin_dir for
534 all direct connections. Should fix bugs 827, 883, and 900.
535 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
536 that would occur on some exit nodes when DNS failures and timeouts
537 occurred in certain patterns. Fix for bug 957.
540 - When starting with a cache over a few days old, do not leak
541 memory for the obsolete router descriptors in it. Bugfix on
542 0.2.0.33; fixes bug 672.
543 - Hidden service clients didn't use a cached service descriptor that
544 was older than 15 minutes, but wouldn't fetch a new one either,
545 because there was already one in the cache. Now, fetch a v2
546 descriptor unless the same descriptor was added to the cache within
547 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
550 Changes in version 0.2.1.16-rc - 2009-06-20
551 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
552 a bunch of minor bugs.
555 - Fix an edge case where a malicious exit relay could convince a
556 controller that the client's DNS question resolves to an internal IP
557 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
559 o Major performance improvements (on 0.2.0.x):
560 - Disable and refactor some debugging checks that forced a linear scan
561 over the whole server-side DNS cache. These accounted for over 50%
562 of CPU time on a relatively busy exit node's gprof profile. Found
564 - Disable some debugging checks that appeared in exit node profile
568 - Update to the "June 3 2009" ip-to-country file.
569 - Do not have tor-resolve automatically refuse all .onion addresses;
570 if AutomapHostsOnResolve is set in your torrc, this will work fine.
572 o Minor bugfixes (on 0.2.0.x):
573 - Log correct error messages for DNS-related network errors on
575 - Fix a race condition that could cause crashes or memory corruption
576 when running as a server with a controller listening for log
578 - Avoid crashing when we have a policy specified in a DirPolicy or
579 SocksPolicy or ReachableAddresses option with ports set on it,
580 and we re-load the policy. May fix bug 996.
581 - Hidden service clients didn't use a cached service descriptor that
582 was older than 15 minutes, but wouldn't fetch a new one either,
583 because there was already one in the cache. Now, fetch a v2
584 descriptor unless the same descriptor was added to the cache within
585 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
587 o Minor bugfixes (on 0.2.1.x):
588 - Don't warn users about low port and hibernation mix when they
589 provide a *ListenAddress directive to fix that. Bugfix on
591 - When switching back and forth between bridge mode, do not start
592 gathering GeoIP data until two hours have passed.
593 - Do not complain that the user has requested an excluded node as
594 an exit when the node is not really an exit. This could happen
595 because the circuit was for testing, or an introduction point.
599 Changes in version 0.2.1.15-rc - 2009-05-25
600 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
601 series. It fixes a major bug on fast exit relays, as well as a variety
604 o Major bugfixes (on 0.2.0.x):
605 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
606 that would occur on some exit nodes when DNS failures and timeouts
607 occurred in certain patterns. Fix for bug 957.
609 o Minor bugfixes (on 0.2.0.x):
610 - Actually return -1 in the error case for read_bandwidth_usage().
611 Harmless bug, since we currently don't care about the return value
612 anywhere. Bugfix on 0.2.0.9-alpha.
613 - Provide a more useful log message if bug 977 (related to buffer
614 freelists) ever reappears, and do not crash right away.
615 - Fix an assertion failure on 64-bit platforms when we allocated
616 memory right up to the end of a memarea, then realigned the memory
617 one step beyond the end. Fixes a possible cause of bug 930.
618 - Protect the count of open sockets with a mutex, so we can't
619 corrupt it when two threads are closing or opening sockets at once.
620 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
621 - Don't allow a bridge to publish its router descriptor to a
622 non-bridge directory authority. Fixes part of bug 932.
623 - When we change to or from being a bridge, reset our counts of
624 client usage by country. Fixes bug 932.
625 - Fix a bug that made stream bandwidth get misreported to the
627 - Stop using malloc_usable_size() to use more area than we had
628 actually allocated: it was safe, but made valgrind really unhappy.
629 - Fix a memory leak when v3 directory authorities load their keys
630 and cert from disk. Bugfix on 0.2.0.1-alpha.
632 o Minor bugfixes (on 0.2.1.x):
633 - Fix use of freed memory when deciding to mark a non-addable
634 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
637 Changes in version 0.2.1.14-rc - 2009-04-12
638 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
639 series. It begins fixing some major performance problems, and also
640 finally addresses the bug that was causing relays on dynamic IP
641 addresses to fall out of the directory.
644 - Clients replace entry guards that were chosen more than a few months
645 ago. This change should significantly improve client performance,
646 especially once more people upgrade, since relays that have been
647 a guard for a long time are currently overloaded.
649 o Major bugfixes (on 0.2.0):
650 - Finally fix the bug where dynamic-IP relays disappear when their
651 IP address changes: directory mirrors were mistakenly telling
652 them their old address if they asked via begin_dir, so they
653 never got an accurate answer about their new address, so they
654 just vanished after a day. For belt-and-suspenders, relays that
655 don't set Address in their config now avoid using begin_dir for
656 all direct connections. Should fix bugs 827, 883, and 900.
657 - Relays were falling out of the networkstatus consensus for
658 part of a day if they changed their local config but the
659 authorities discarded their new descriptor as "not sufficiently
660 different". Now directory authorities accept a descriptor as changed
661 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
663 - Avoid crashing in the presence of certain malformed descriptors.
664 Found by lark, and by automated fuzzing.
667 - When generating circuit events with verbose nicknames for
668 controllers, try harder to look up nicknames for routers on a
669 circuit. (Previously, we would look in the router descriptors we had
670 for nicknames, but not in the consensus.) Partial fix for bug 941.
671 - If the bridge config line doesn't specify a port, assume 443.
672 This makes bridge lines a bit smaller and easier for users to
674 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
675 bytes (aka 20KB/s), to match our documentation. Also update
676 directory authorities so they always assign the Fast flag to relays
677 with 20KB/s of capacity. Now people running relays won't suddenly
678 find themselves not seeing any use, if the network gets faster
680 - Update to the "April 3 2009" ip-to-country file.
683 - Avoid trying to print raw memory to the logs when we decide to
684 give up on downloading a given relay descriptor. Bugfix on
686 - In tor-resolve, when the Tor client to use is specified by
687 <hostname>:<port>, actually use the specified port rather than
688 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
689 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
690 - When starting with a cache over a few days old, do not leak
691 memory for the obsolete router descriptors in it. Bugfix on
693 - Avoid double-free on list of successfully uploaded hidden
694 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
695 - Change memarea_strndup() implementation to work even when
696 duplicating a string at the end of a page. This bug was
697 harmless for now, but could have meant crashes later. Fix by
698 lark. Bugfix on 0.2.1.1-alpha.
699 - Limit uploaded directory documents to be 16M rather than 500K.
700 The directory authorities were refusing v3 consensus votes from
701 other authorities, since the votes are now 504K. Fixes bug 959;
702 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
703 - Directory authorities should never send a 503 "busy" response to
704 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
708 Changes in version 0.2.1.13-alpha - 2009-03-09
709 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
710 cleanups. We're finally getting close to a release candidate.
713 - Correctly update the list of which countries we exclude as
714 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
715 lark. Bugfix on 0.2.1.6-alpha.
717 o Minor bugfixes (on 0.2.0.x and earlier):
718 - Automatically detect MacOSX versions earlier than 10.4.0, and
719 disable kqueue from inside Tor when running with these versions.
720 We previously did this from the startup script, but that was no
721 help to people who didn't use the startup script. Resolves bug 863.
722 - When we had picked an exit node for a connection, but marked it as
723 "optional", and it turned out we had no onion key for the exit,
724 stop wanting that exit and try again. This situation may not
725 be possible now, but will probably become feasible with proposal
726 158. Spotted by rovv. Fixes another case of bug 752.
727 - Clients no longer cache certificates for authorities they do not
728 recognize. Bugfix on 0.2.0.9-alpha.
729 - When we can't transmit a DNS request due to a network error, retry
730 it after a while, and eventually transmit a failing response to
731 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
732 - If the controller claimed responsibility for a stream, but that
733 stream never finished making its connection, it would live
734 forever in circuit_wait state. Now we close it after SocksTimeout
735 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
736 - Drop begin cells to a hidden service if they come from the middle
737 of a circuit. Patch from lark.
738 - When we erroneously receive two EXTEND cells for the same circuit
739 ID on the same connection, drop the second. Patch from lark.
740 - Fix a crash that occurs on exit nodes when a nameserver request
741 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
742 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
744 - Do not assume that a stack-allocated character array will be
745 64-bit aligned on platforms that demand that uint64_t access is
746 aligned. Possible fix for bug 604.
747 - Parse dates and IPv4 addresses in a locale- and libc-independent
748 manner, to avoid platform-dependent behavior on malformed input.
749 - Build correctly when configured to build outside the main source
750 path. Patch from Michael Gold.
751 - We were already rejecting relay begin cells with destination port
752 of 0. Now also reject extend cells with destination port or address
753 of 0. Suggested by lark.
755 o Minor bugfixes (on 0.2.1.x):
756 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
757 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
758 - If we're an exit node, scrub the IP address to which we are exiting
759 in the logs. Bugfix on 0.2.1.8-alpha.
762 - On Linux, use the prctl call to re-enable core dumps when the user
764 - New controller event NEWCONSENSUS that lists the networkstatus
765 lines for every recommended relay. Now controllers like Torflow
766 can keep up-to-date on which relays they should be using.
767 - Update to the "February 26 2009" ip-to-country file.
770 Changes in version 0.2.0.34 - 2009-02-08
771 Tor 0.2.0.34 features several more security-related fixes. You should
772 upgrade, especially if you run an exit relay (remote crash) or a
773 directory authority (remote infinite loop), or you're on an older
774 (pre-XP) or not-recently-patched Windows (remote exploit).
776 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
777 have many known flaws, and nobody should be using them. You should
778 upgrade. If you're using a Linux or BSD and its packages are obsolete,
779 stop using those packages and upgrade anyway.
782 - Fix an infinite-loop bug on handling corrupt votes under certain
783 circumstances. Bugfix on 0.2.0.8-alpha.
784 - Fix a temporary DoS vulnerability that could be performed by
785 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
786 - Avoid a potential crash on exit nodes when processing malformed
787 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
788 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
789 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
792 - Fix compilation on systems where time_t is a 64-bit integer.
793 Patch from Matthias Drochner.
794 - Don't consider expiring already-closed client connections. Fixes
795 bug 893. Bugfix on 0.0.2pre20.
798 Changes in version 0.2.1.12-alpha - 2009-02-08
799 Tor 0.2.1.12-alpha features several more security-related fixes. You
800 should upgrade, especially if you run an exit relay (remote crash) or
801 a directory authority (remote infinite loop), or you're on an older
802 (pre-XP) or not-recently-patched Windows (remote exploit). It also
803 includes a big pile of minor bugfixes and cleanups.
806 - Fix an infinite-loop bug on handling corrupt votes under certain
807 circumstances. Bugfix on 0.2.0.8-alpha.
808 - Fix a temporary DoS vulnerability that could be performed by
809 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
810 - Avoid a potential crash on exit nodes when processing malformed
811 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
814 - Let controllers actually ask for the "clients_seen" event for
815 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
816 reported by Matt Edman.
817 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
819 - Fix a bug in address parsing that was preventing bridges or hidden
820 service targets from being at IPv6 addresses.
821 - Solve a bug that kept hardware crypto acceleration from getting
822 enabled when accounting was turned on. Fixes bug 907. Bugfix on
824 - Remove a bash-ism from configure.in to build properly on non-Linux
825 platforms. Bugfix on 0.2.1.1-alpha.
826 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
827 headers. Bugfix on 0.2.0.10-alpha.
828 - Don't consider expiring already-closed client connections. Fixes
829 bug 893. Bugfix on 0.0.2pre20.
830 - Fix another interesting corner-case of bug 891 spotted by rovv:
831 Previously, if two hosts had different amounts of clock drift, and
832 one of them created a new connection with just the wrong timing,
833 the other might decide to deprecate the new connection erroneously.
834 Bugfix on 0.1.1.13-alpha.
835 - Resolve a very rare crash bug that could occur when the user forced
836 a nameserver reconfiguration during the middle of a nameserver
837 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
838 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
839 Bugfix on 0.2.1.7-alpha.
840 - If we're using bridges and our network goes away, be more willing
841 to forgive our bridges and try again when we get an application
842 request. Bugfix on 0.2.0.x.
845 - Support platforms where time_t is 64 bits long. (Congratulations,
846 NetBSD!) Patch from Matthias Drochner.
847 - Add a 'getinfo status/clients-seen' controller command, in case
848 controllers want to hear clients_seen events but connect late.
851 - Disable GCC's strict alias optimization by default, to avoid the
852 likelihood of its introducing subtle bugs whenever our code violates
853 the letter of C99's alias rules.
856 Changes in version 0.2.0.33 - 2009-01-21
857 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
858 useful to users. It also finally fixes a bug where a relay or client
859 that's been off for many days would take a long time to bootstrap.
861 This update also fixes an important security-related bug reported by
862 Ilja van Sprundel. You should upgrade. (We'll send out more details
863 about the bug once people have had some time to upgrade.)
866 - Fix a heap-corruption bug that may be remotely triggerable on
867 some platforms. Reported by Ilja van Sprundel.
870 - When a stream at an exit relay is in state "resolving" or
871 "connecting" and it receives an "end" relay cell, the exit relay
872 would silently ignore the end cell and not close the stream. If
873 the client never closes the circuit, then the exit relay never
874 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
876 - When sending CREATED cells back for a given circuit, use a 64-bit
877 connection ID to find the right connection, rather than an addr:port
878 combination. Now that we can have multiple OR connections between
879 the same ORs, it is no longer possible to use addr:port to uniquely
880 identify a connection.
881 - Bridge relays that had DirPort set to 0 would stop fetching
882 descriptors shortly after startup, and then briefly resume
883 after a new bandwidth test and/or after publishing a new bridge
884 descriptor. Bridge users that try to bootstrap from them would
885 get a recent networkstatus but would get descriptors from up to
886 18 hours earlier, meaning most of the descriptors were obsolete
887 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
888 - Prevent bridge relays from serving their 'extrainfo' document
889 to anybody who asks, now that extrainfo docs include potentially
890 sensitive aggregated client geoip summaries. Bugfix on
892 - If the cached networkstatus consensus is more than five days old,
893 discard it rather than trying to use it. In theory it could be
894 useful because it lists alternate directory mirrors, but in practice
895 it just means we spend many minutes trying directory mirrors that
896 are long gone from the network. Also discard router descriptors as
897 we load them if they are more than five days old, since the onion
898 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
901 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
902 could make gcc generate non-functional binary search code. Bugfix
904 - Build correctly on platforms without socklen_t.
905 - Compile without warnings on solaris.
906 - Avoid potential crash on internal error during signature collection.
907 Fixes bug 864. Patch from rovv.
908 - Correct handling of possible malformed authority signing key
909 certificates with internal signature types. Fixes bug 880.
910 Bugfix on 0.2.0.3-alpha.
911 - Fix a hard-to-trigger resource leak when logging credential status.
913 - When we can't initialize DNS because the network is down, do not
914 automatically stop Tor from starting. Instead, we retry failed
915 dns_init() every 10 minutes, and change the exit policy to reject
916 *:* until one succeeds. Fixes bug 691.
917 - Use 64 bits instead of 32 bits for connection identifiers used with
918 the controller protocol, to greatly reduce risk of identifier reuse.
919 - When we're choosing an exit node for a circuit, and we have
920 no pending streams, choose a good general exit rather than one that
921 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
922 - Fix another case of assuming, when a specific exit is requested,
923 that we know more than the user about what hosts it allows.
924 Fixes one case of bug 752. Patch from rovv.
925 - Clip the MaxCircuitDirtiness config option to a minimum of 10
926 seconds. Warn the user if lower values are given in the
927 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
928 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
929 user if lower values are given in the configuration. Bugfix on
930 0.1.1.17-rc. Patch by Sebastian.
931 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
932 the cache because we already had a v0 descriptor with the same ID.
933 Bugfix on 0.2.0.18-alpha.
934 - Fix a race condition when freeing keys shared between main thread
935 and CPU workers that could result in a memory leak. Bugfix on
936 0.1.0.1-rc. Fixes bug 889.
937 - Send a valid END cell back when a client tries to connect to a
938 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
939 840. Patch from rovv.
940 - Check which hops rendezvous stream cells are associated with to
941 prevent possible guess-the-streamid injection attacks from
942 intermediate hops. Fixes another case of bug 446. Based on patch
944 - If a broken client asks a non-exit router to connect somewhere,
945 do not even do the DNS lookup before rejecting the connection.
946 Fixes another case of bug 619. Patch from rovv.
947 - When a relay gets a create cell it can't decrypt (e.g. because it's
948 using the wrong onion key), we were dropping it and letting the
949 client time out. Now actually answer with a destroy cell. Fixes
950 bug 904. Bugfix on 0.0.2pre8.
952 o Minor bugfixes (hidden services):
953 - Do not throw away existing introduction points on SIGHUP. Bugfix on
954 0.0.6pre1. Patch by Karsten. Fixes bug 874.
957 - Report the case where all signatures in a detached set are rejected
958 differently than the case where there is an error handling the
960 - When we realize that another process has modified our cached
961 descriptors, print out a more useful error message rather than
962 triggering an assertion. Fixes bug 885. Patch from Karsten.
963 - Implement the 0x20 hack to better resist DNS poisoning: set the
964 case on outgoing DNS requests randomly, and reject responses that do
965 not match the case correctly. This logic can be disabled with the
966 ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
967 of servers that do not reliably preserve case in replies. See
968 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
970 - Check DNS replies for more matching fields to better resist DNS
972 - Never use OpenSSL compression: it wastes RAM and CPU trying to
973 compress cells, which are basically all encrypted, compressed, or
977 Changes in version 0.2.1.11-alpha - 2009-01-20
978 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
979 week it will take a long time to bootstrap again" bug. It also fixes
980 an important security-related bug reported by Ilja van Sprundel. You
981 should upgrade. (We'll send out more details about the bug once people
982 have had some time to upgrade.)
985 - Fix a heap-corruption bug that may be remotely triggerable on
986 some platforms. Reported by Ilja van Sprundel.
989 - Discard router descriptors as we load them if they are more than
990 five days old. Otherwise if Tor is off for a long time and then
991 starts with cached descriptors, it will try to use the onion
992 keys in those obsolete descriptors when building circuits. Bugfix
993 on 0.2.0.x. Fixes bug 887.
996 - Try to make sure that the version of Libevent we're running with
997 is binary-compatible with the one we built with. May address bug
999 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
1000 for bug 905. Bugfix on 0.2.1.7-alpha.
1001 - Add a new --enable-local-appdata configuration switch to change
1002 the default location of the datadir on win32 from APPDATA to
1003 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
1004 entirely. Patch from coderman.
1007 - Make outbound DNS packets respect the OutboundBindAddress setting.
1008 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
1009 - When our circuit fails at the first hop (e.g. we get a destroy
1010 cell back), avoid using that OR connection anymore, and also
1011 tell all the one-hop directory requests waiting for it that they
1012 should fail. Bugfix on 0.2.1.3-alpha.
1013 - In the torify(1) manpage, mention that tsocks will leak your
1017 Changes in version 0.2.1.10-alpha - 2009-01-06
1018 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
1019 would make the bridge relay not so useful if it had DirPort set to 0,
1020 and one that could let an attacker learn a little bit of information
1021 about the bridge's users), and a bug that would cause your Tor relay
1022 to ignore a circuit create request it can't decrypt (rather than reply
1023 with an error). It also fixes a wide variety of other bugs.
1026 - If the cached networkstatus consensus is more than five days old,
1027 discard it rather than trying to use it. In theory it could
1028 be useful because it lists alternate directory mirrors, but in
1029 practice it just means we spend many minutes trying directory
1030 mirrors that are long gone from the network. Helps bug 887 a bit;
1032 - Bridge relays that had DirPort set to 0 would stop fetching
1033 descriptors shortly after startup, and then briefly resume
1034 after a new bandwidth test and/or after publishing a new bridge
1035 descriptor. Bridge users that try to bootstrap from them would
1036 get a recent networkstatus but would get descriptors from up to
1037 18 hours earlier, meaning most of the descriptors were obsolete
1038 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
1039 - Prevent bridge relays from serving their 'extrainfo' document
1040 to anybody who asks, now that extrainfo docs include potentially
1041 sensitive aggregated client geoip summaries. Bugfix on
1045 - New controller event "clients_seen" to report a geoip-based summary
1046 of which countries we've seen clients from recently. Now controllers
1047 like Vidalia can show bridge operators that they're actually making
1049 - Build correctly against versions of OpenSSL 0.9.8 or later built
1050 without support for deprecated functions.
1051 - Update to the "December 19 2008" ip-to-country file.
1053 o Minor bugfixes (on 0.2.0.x):
1054 - Authorities now vote for the Stable flag for any router whose
1055 weighted MTBF is at least 5 days, regardless of the mean MTBF.
1056 - Do not remove routers as too old if we do not have any consensus
1057 document. Bugfix on 0.2.0.7-alpha.
1058 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
1059 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
1060 - When an exit relay resolves a stream address to a local IP address,
1061 do not just keep retrying that same exit relay over and
1062 over. Instead, just close the stream. Addresses bug 872. Bugfix
1063 on 0.2.0.32. Patch from rovv.
1064 - If a hidden service sends us an END cell, do not consider
1065 retrying the connection; just close it. Patch from rovv.
1066 - When we made bridge authorities stop serving bridge descriptors over
1067 unencrypted links, we also broke DirPort reachability testing for
1068 bridges. So bridges with a non-zero DirPort were printing spurious
1069 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
1070 - When a relay gets a create cell it can't decrypt (e.g. because it's
1071 using the wrong onion key), we were dropping it and letting the
1072 client time out. Now actually answer with a destroy cell. Fixes
1073 bug 904. Bugfix on 0.0.2pre8.
1074 - Squeeze 2-5% out of client performance (according to oprofile) by
1075 improving the implementation of some policy-manipulation functions.
1077 o Minor bugfixes (on 0.2.1.x):
1078 - Make get_interface_address() function work properly again; stop
1079 guessing the wrong parts of our address as our address.
1080 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
1081 send on that circuit. Otherwise we might violate the proposal-110
1082 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
1084 - When we're sending non-EXTEND cells to the first hop in a circuit,
1085 for example to use an encrypted directory connection, we don't need
1086 to use RELAY_EARLY cells: the first hop knows what kind of cell
1087 it is, and nobody else can even see the cell type. Conserving
1088 RELAY_EARLY cells makes it easier to cannibalize circuits like
1090 - Stop logging nameserver addresses in reverse order.
1091 - If we are retrying a directory download slowly over and over, do
1092 not automatically give up after the 254th failure. Bugfix on
1094 - Resume reporting accurate "stream end" reasons to the local control
1095 port. They were lost in the changes for Proposal 148. Bugfix on
1098 o Deprecated and removed features:
1099 - The old "tor --version --version" command, which would print out
1100 the subversion "Id" of most of the source files, is now removed. It
1101 turned out to be less useful than we'd expected, and harder to
1104 o Code simplifications and refactoring:
1105 - Change our header file guard macros to be less likely to conflict
1106 with system headers. Adam Langley noticed that we were conflicting
1107 with log.h on Android.
1108 - Tool-assisted documentation cleanup. Nearly every function or
1109 static variable in Tor should have its own documentation now.
1112 Changes in version 0.2.1.9-alpha - 2008-12-25
1113 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
1115 o New directory authorities:
1116 - gabelmoo (the authority run by Karsten Loesing) now has a new
1120 - Never use a connection with a mismatched address to extend a
1121 circuit, unless that connection is canonical. A canonical
1122 connection is one whose address is authenticated by the router's
1123 identity key, either in a NETINFO cell or in a router descriptor.
1124 - Avoid a possible memory corruption bug when receiving hidden service
1125 descriptors. Bugfix on 0.2.1.6-alpha.
1128 - Fix a logic error that would automatically reject all but the first
1129 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
1130 part of bug 813/868. Bug spotted by coderman.
1131 - When a stream at an exit relay is in state "resolving" or
1132 "connecting" and it receives an "end" relay cell, the exit relay
1133 would silently ignore the end cell and not close the stream. If
1134 the client never closes the circuit, then the exit relay never
1135 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
1137 - When we can't initialize DNS because the network is down, do not
1138 automatically stop Tor from starting. Instead, retry failed
1139 dns_init() every 10 minutes, and change the exit policy to reject
1140 *:* until one succeeds. Fixes bug 691.
1143 - Give a better error message when an overzealous init script says
1144 "sudo -u username tor --user username". Makes Bug 882 easier for
1146 - When a directory authority gives us a new guess for our IP address,
1147 log which authority we used. Hopefully this will help us debug
1148 the recent complaints about bad IP address guesses.
1149 - Detect svn revision properly when we're using git-svn.
1150 - Try not to open more than one descriptor-downloading connection
1151 to an authority at once. This should reduce load on directory
1152 authorities. Fixes bug 366.
1153 - Add cross-certification to newly generated certificates, so that
1154 a signing key is enough information to look up a certificate.
1155 Partial implementation of proposal 157.
1156 - Start serving certificates by <identity digest, signing key digest>
1157 pairs. Partial implementation of proposal 157.
1158 - Clients now never report any stream end reason except 'MISC'.
1159 Implements proposal 148.
1160 - On platforms with a maximum syslog string length, truncate syslog
1161 messages to that length ourselves, rather than relying on the
1162 system to do it for us.
1163 - Optimize out calls to time(NULL) that occur for every IO operation,
1164 or for every cell. On systems where time() is a slow syscall,
1165 this fix will be slightly helpful.
1166 - Exit servers can now answer resolve requests for ip6.arpa addresses.
1167 - When we download a descriptor that we then immediately (as
1168 a directory authority) reject, do not retry downloading it right
1169 away. Should save some bandwidth on authorities. Fix for bug
1170 888. Patch by Sebastian Hahn.
1171 - When a download gets us zero good descriptors, do not notify
1172 Tor that new directory information has arrived.
1173 - Avoid some nasty corner cases in the logic for marking connections
1174 as too old or obsolete or noncanonical for circuits. Partial
1177 o Minor features (controller):
1178 - New CONSENSUS_ARRIVED event to note when a new consensus has
1179 been fetched and validated.
1180 - When we realize that another process has modified our cached
1181 descriptors file, print out a more useful error message rather
1182 than triggering an assertion. Fixes bug 885. Patch from Karsten.
1183 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
1184 controllers to prevent SIGHUP from reloading the
1185 configuration. Fixes bug 856.
1188 - Resume using the correct "REASON=" stream when telling the
1189 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
1190 - When a canonical connection appears later in our internal list
1191 than a noncanonical one for a given OR ID, always use the
1192 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
1194 - Clip the MaxCircuitDirtiness config option to a minimum of 10
1195 seconds. Warn the user if lower values are given in the
1196 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
1197 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
1198 user if lower values are given in the configuration. Bugfix on
1199 0.1.1.17-rc. Patch by Sebastian.
1200 - Fix a race condition when freeing keys shared between main thread
1201 and CPU workers that could result in a memory leak. Bugfix on
1202 0.1.0.1-rc. Fixes bug 889.
1204 o Minor bugfixes (hidden services):
1205 - Do not throw away existing introduction points on SIGHUP (bugfix on
1206 0.0.6pre1); also, do not stall hidden services because we're
1207 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
1208 by John Brooks. Patch by Karsten. Fixes bug 874.
1209 - Fix a memory leak when we decline to add a v2 rendezvous
1210 descriptor to the cache because we already had a v0 descriptor
1211 with the same ID. Bugfix on 0.2.0.18-alpha.
1213 o Deprecated and removed features:
1214 - RedirectExits has been removed. It was deprecated since
1216 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
1217 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
1218 - Cell pools are now always enabled; --disable-cell-pools is ignored.
1220 o Code simplifications and refactoring:
1221 - Rename the confusing or_is_obsolete field to the more appropriate
1222 is_bad_for_new_circs, and move it to or_connection_t where it
1224 - Move edge-only flags from connection_t to edge_connection_t: not
1225 only is this better coding, but on machines of plausible alignment,
1226 it should save 4-8 bytes per connection_t. "Every little bit helps."
1227 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
1228 for consistency; keep old option working for backward compatibility.
1229 - Simplify the code for finding connections to use for a circuit.
1232 Changes in version 0.2.1.8-alpha - 2008-12-08
1233 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
1234 builds better on unusual platforms like Solaris and old OS X, and
1235 fixes a variety of other issues.
1238 - New DirPortFrontPage option that takes an html file and publishes
1239 it as "/" on the DirPort. Now relay operators can provide a
1240 disclaimer without needing to set up a separate webserver. There's
1241 a sample disclaimer in contrib/tor-exit-notice.html.
1244 - When the client is choosing entry guards, now it selects at most
1245 one guard from a given relay family. Otherwise we could end up with
1246 all of our entry points into the network run by the same operator.
1247 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
1250 - Fix a DOS opportunity during the voting signature collection process
1251 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
1252 - Fix a possible segfault when establishing an exit connection. Bugfix
1256 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
1258 - Made Tor a little less aggressive about deleting expired
1259 certificates. Partial fix for bug 854.
1260 - Stop doing unaligned memory access that generated bus errors on
1261 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
1262 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
1263 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
1264 - Make USR2 log-level switch take effect immediately. Bugfix on
1266 - If one win32 nameserver fails to get added, continue adding the
1267 rest, and don't automatically fail.
1268 - Use fcntl() for locking when flock() is not available. Should fix
1269 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
1270 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
1271 could make gcc generate non-functional binary search code. Bugfix
1273 - Build correctly on platforms without socklen_t.
1274 - Avoid potential crash on internal error during signature collection.
1275 Fixes bug 864. Patch from rovv.
1276 - Do not use C's stdio library for writing to log files. This will
1277 improve logging performance by a minute amount, and will stop
1278 leaking fds when our disk is full. Fixes bug 861.
1279 - Stop erroneous use of O_APPEND in cases where we did not in fact
1280 want to re-seek to the end of a file before every last write().
1281 - Correct handling of possible malformed authority signing key
1282 certificates with internal signature types. Fixes bug 880. Bugfix
1284 - Fix a hard-to-trigger resource leak when logging credential status.
1288 - Directory mirrors no longer fetch the v1 directory or
1289 running-routers files. They are obsolete, and nobody asks for them
1290 anymore. This is the first step to making v1 authorities obsolete.
1292 o Minor features (controller):
1293 - Return circuit purposes in response to GETINFO circuit-status. Fixes
1297 Changes in version 0.2.0.32 - 2008-11-20
1298 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
1299 packages (and maybe other packages) noticed by Theo de Raadt, fixes
1300 a smaller security flaw that might allow an attacker to access local
1301 services, further improves hidden service performance, and fixes a
1302 variety of other issues.
1305 - The "User" and "Group" config options did not clear the
1306 supplementary group entries for the Tor process. The "User" option
1307 is now more robust, and we now set the groups to the specified
1308 user's primary group. The "Group" option is now ignored. For more
1309 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
1310 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
1311 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
1312 - The "ClientDNSRejectInternalAddresses" config option wasn't being
1313 consistently obeyed: if an exit relay refuses a stream because its
1314 exit policy doesn't allow it, we would remember what IP address
1315 the relay said the destination address resolves to, even if it's
1316 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
1319 - Fix a DOS opportunity during the voting signature collection process
1320 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
1322 o Major bugfixes (hidden services):
1323 - When fetching v0 and v2 rendezvous service descriptors in parallel,
1324 we were failing the whole hidden service request when the v0
1325 descriptor fetch fails, even if the v2 fetch is still pending and
1326 might succeed. Similarly, if the last v2 fetch fails, we were
1327 failing the whole hidden service request even if a v0 fetch is
1328 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
1329 - When extending a circuit to a hidden service directory to upload a
1330 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
1331 requests failed, because the router descriptor has not been
1332 downloaded yet. In these cases, do not attempt to upload the
1333 rendezvous descriptor, but wait until the router descriptor is
1334 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
1335 descriptor from a hidden service directory for which the router
1336 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
1340 - Fix several infrequent memory leaks spotted by Coverity.
1341 - When testing for libevent functions, set the LDFLAGS variable
1342 correctly. Found by Riastradh.
1343 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
1344 bootstrapping with tunneled directory connections. Bugfix on
1345 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
1346 - When asked to connect to A.B.exit:80, if we don't know the IP for A
1347 and we know that server B rejects most-but-not all connections to
1348 port 80, we would previously reject the connection. Now, we assume
1349 the user knows what they were asking for. Fixes bug 752. Bugfix
1350 on 0.0.9rc5. Diagnosed by BarkerJr.
1351 - If we overrun our per-second write limits a little, count this as
1352 having used up our write allocation for the second, and choke
1353 outgoing directory writes. Previously, we had only counted this when
1354 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
1355 Bugfix on 0.2.0.x (??).
1356 - Remove the old v2 directory authority 'lefkada' from the default
1357 list. It has been gone for many months.
1358 - Stop doing unaligned memory access that generated bus errors on
1359 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
1360 - Make USR2 log-level switch take effect immediately. Bugfix on
1363 o Minor bugfixes (controller):
1364 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
1365 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
1368 Changes in version 0.2.1.7-alpha - 2008-11-08
1369 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
1370 packages (and maybe other packages) noticed by Theo de Raadt, fixes
1371 a smaller security flaw that might allow an attacker to access local
1372 services, adds better defense against DNS poisoning attacks on exit
1373 relays, further improves hidden service performance, and fixes a
1374 variety of other issues.
1377 - The "ClientDNSRejectInternalAddresses" config option wasn't being
1378 consistently obeyed: if an exit relay refuses a stream because its
1379 exit policy doesn't allow it, we would remember what IP address
1380 the relay said the destination address resolves to, even if it's
1381 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
1382 - The "User" and "Group" config options did not clear the
1383 supplementary group entries for the Tor process. The "User" option
1384 is now more robust, and we now set the groups to the specified
1385 user's primary group. The "Group" option is now ignored. For more
1386 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
1387 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
1388 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
1389 - Do not use or believe expired v3 authority certificates. Patch
1390 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
1393 - Now NodeFamily and MyFamily config options allow spaces in
1394 identity fingerprints, so it's easier to paste them in.
1395 Suggested by Lucky Green.
1396 - Implement the 0x20 hack to better resist DNS poisoning: set the
1397 case on outgoing DNS requests randomly, and reject responses that do
1398 not match the case correctly. This logic can be disabled with the
1399 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
1400 of servers that do not reliably preserve case in replies. See
1401 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
1403 - Preserve case in replies to DNSPort requests in order to support
1404 the 0x20 hack for resisting DNS poisoning attacks.
1406 o Hidden service performance improvements:
1407 - When the client launches an introduction circuit, retry with a
1408 new circuit after 30 seconds rather than 60 seconds.
1409 - Launch a second client-side introduction circuit in parallel
1410 after a delay of 15 seconds (based on work by Christian Wilms).
1411 - Hidden services start out building five intro circuits rather
1412 than three, and when the first three finish they publish a service
1413 descriptor using those. Now we publish our service descriptor much
1414 faster after restart.
1417 - Minor fix in the warning messages when you're having problems
1418 bootstrapping; also, be more forgiving of bootstrap problems when
1419 we're still making incremental progress on a given bootstrap phase.
1420 - When we're choosing an exit node for a circuit, and we have
1421 no pending streams, choose a good general exit rather than one that
1422 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
1423 - Send a valid END cell back when a client tries to connect to a
1424 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
1425 840. Patch from rovv.
1426 - If a broken client asks a non-exit router to connect somewhere,
1427 do not even do the DNS lookup before rejecting the connection.
1428 Fixes another case of bug 619. Patch from rovv.
1429 - Fix another case of assuming, when a specific exit is requested,
1430 that we know more than the user about what hosts it allows.
1431 Fixes another case of bug 752. Patch from rovv.
1432 - Check which hops rendezvous stream cells are associated with to
1433 prevent possible guess-the-streamid injection attacks from
1434 intermediate hops. Fixes another case of bug 446. Based on patch
1436 - Avoid using a negative right-shift when comparing 32-bit
1437 addresses. Possible fix for bug 845 and bug 811.
1438 - Make the assert_circuit_ok() function work correctly on circuits that
1439 have already been marked for close.
1440 - Fix read-off-the-end-of-string error in unit tests when decoding
1441 introduction points.
1442 - Fix uninitialized size field for memory area allocation: may improve
1443 memory performance during directory parsing.
1444 - Treat duplicate certificate fetches as failures, so that we do
1445 not try to re-fetch an expired certificate over and over and over.
1446 - Do not say we're fetching a certificate when we'll in fact skip it
1447 because of a pending download.
1450 Changes in version 0.2.1.6-alpha - 2008-09-30
1451 Tor 0.2.1.6-alpha further improves performance and robustness of
1452 hidden services, starts work on supporting per-country relay selection,
1453 and fixes a variety of smaller issues.
1456 - Implement proposal 121: make it possible to build hidden services
1457 that only certain clients are allowed to connect to. This is
1458 enforced at several points, so that unauthorized clients are unable
1459 to send INTRODUCE cells to the service, or even (depending on the
1460 type of authentication) to learn introduction points. This feature
1461 raises the bar for certain kinds of active attacks against hidden
1462 services. Code by Karsten Loesing.
1463 - Relays now store and serve v2 hidden service descriptors by default,
1464 i.e., the new default value for HidServDirectoryV2 is 1. This is
1465 the last step in proposal 114, which aims to make hidden service
1466 lookups more reliable.
1467 - Start work to allow node restrictions to include country codes. The
1468 syntax to exclude nodes in a country with country code XX is
1469 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
1470 refinement to decide what config options should take priority if
1471 you ask to both use a particular node and exclude it.
1472 - Allow ExitNodes list to include IP ranges and country codes, just
1473 like the Exclude*Nodes lists. Patch from Robert Hogan.
1476 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
1477 Tor to fail to start if you had it configured to use a bridge
1478 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
1479 - When extending a circuit to a hidden service directory to upload a
1480 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
1481 requests failed, because the router descriptor had not been
1482 downloaded yet. In these cases, we now wait until the router
1483 descriptor is downloaded, and then retry. Likewise, clients
1484 now skip over a hidden service directory if they don't yet have
1485 its router descriptor, rather than futilely requesting it and
1486 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
1488 - When fetching v0 and v2 rendezvous service descriptors in parallel,
1489 we were failing the whole hidden service request when the v0
1490 descriptor fetch fails, even if the v2 fetch is still pending and
1491 might succeed. Similarly, if the last v2 fetch fails, we were
1492 failing the whole hidden service request even if a v0 fetch is
1493 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
1494 - DNS replies need to have names matching their requests, but
1495 these names should be in the questions section, not necessarily
1496 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
1499 - Update to the "September 1 2008" ip-to-country file.
1500 - Allow ports 465 and 587 in the default exit policy again. We had
1501 rejected them in 0.1.0.15, because back in 2005 they were commonly
1502 misconfigured and ended up as spam targets. We hear they are better
1503 locked down these days.
1504 - Use a lockfile to make sure that two Tor processes are not
1505 simultaneously running with the same datadir.
1506 - Serve the latest v3 networkstatus consensus via the control
1507 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
1508 - Better logging about stability/reliability calculations on directory
1510 - Drop the requirement to have an open dir port for storing and
1511 serving v2 hidden service descriptors.
1512 - Directory authorities now serve a /tor/dbg-stability.txt URL to
1513 help debug WFU and MTBF calculations.
1514 - Implement most of Proposal 152: allow specialized servers to permit
1515 single-hop circuits, and clients to use those servers to build
1516 single-hop circuits when using a specialized controller. Patch
1517 from Josh Albrecht. Resolves feature request 768.
1518 - Add a -p option to tor-resolve for specifying the SOCKS port: some
1519 people find host:port too confusing.
1520 - Make TrackHostExit mappings expire a while after their last use, not
1521 after their creation. Patch from Robert Hogan.
1522 - Provide circuit purposes along with circuit events to the controller.
1525 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
1527 - Fixed some memory leaks -- some quite frequent, some almost
1528 impossible to trigger -- based on results from Coverity.
1529 - When testing for libevent functions, set the LDFLAGS variable
1530 correctly. Found by Riastradh.
1531 - Fix an assertion bug in parsing policy-related options; possible fix
1533 - Catch and report a few more bootstrapping failure cases when Tor
1534 fails to establish a TCP connection. Cleanup on 0.2.1.x.
1535 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
1536 bootstrapping with tunneled directory connections. Bugfix on
1537 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
1538 - When asked to connect to A.B.exit:80, if we don't know the IP for A
1539 and we know that server B rejects most-but-not all connections to
1540 port 80, we would previously reject the connection. Now, we assume
1541 the user knows what they were asking for. Fixes bug 752. Bugfix
1542 on 0.0.9rc5. Diagnosed by BarkerJr.
1543 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
1544 service directories if they have no advertised dir port. Bugfix
1546 - If we overrun our per-second write limits a little, count this as
1547 having used up our write allocation for the second, and choke
1548 outgoing directory writes. Previously, we had only counted this when
1549 we had met our limits precisely. Fixes bug 824. Patch by rovv.
1550 Bugfix on 0.2.0.x (??).
1551 - Avoid a "0 divided by 0" calculation when calculating router uptime
1552 at directory authorities. Bugfix on 0.2.0.8-alpha.
1553 - Make DNS resolved controller events into "CLOSED", not
1554 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
1556 - Fix a bug where an unreachable relay would establish enough
1557 reachability testing circuits to do a bandwidth test -- if
1558 we already have a connection to the middle hop of the testing
1559 circuit, then it could establish the last hop by using the existing
1560 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
1561 circuits no longer use entry guards in 0.2.1.3-alpha.
1562 - If we have correct permissions on $datadir, we complain to stdout
1563 and fail to start. But dangerous permissions on
1564 $datadir/cached-status/ would cause us to open a log and complain
1565 there. Now complain to stdout and fail to start in both cases. Fixes
1566 bug 820, reported by seeess.
1567 - Remove the old v2 directory authority 'lefkada' from the default
1568 list. It has been gone for many months.
1570 o Code simplifications and refactoring:
1571 - Revise the connection_new functions so that a more typesafe variant
1572 exists. This will work better with Coverity, and let us find any
1573 actual mistakes we're making here.
1574 - Refactor unit testing logic so that dmalloc can be used sensibly
1575 with unit tests to check for memory leaks.
1576 - Move all hidden-service related fields from connection and circuit
1577 structure to substructures: this way they won't eat so much memory.
1580 Changes in version 0.2.0.31 - 2008-09-03
1581 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
1582 a big bug we're seeing where in rare cases traffic from one Tor stream
1583 gets mixed into another stream, and fixes a variety of smaller issues.
1586 - Make sure that two circuits can never exist on the same connection
1587 with the same circuit ID, even if one is marked for close. This
1588 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
1589 - Relays now reject risky extend cells: if the extend cell includes
1590 a digest of all zeroes, or asks to extend back to the relay that
1591 sent the extend cell, tear down the circuit. Ideas suggested
1593 - If not enough of our entry guards are available so we add a new
1594 one, we might use the new one even if it overlapped with the
1595 current circuit's exit relay (or its family). Anonymity bugfix
1596 pointed out by rovv.
1599 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
1600 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
1601 - Correctly detect the presence of the linux/netfilter_ipv4.h header
1602 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
1603 - Pick size of default geoip filename string correctly on windows.
1604 Fixes bug 806. Bugfix on 0.2.0.30.
1605 - Make the autoconf script accept the obsolete --with-ssl-dir
1606 option as an alias for the actually-working --with-openssl-dir
1607 option. Fix the help documentation to recommend --with-openssl-dir.
1608 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
1609 - When using the TransPort option on OpenBSD, and using the User
1610 option to change UID and drop privileges, make sure to open
1611 /dev/pf before dropping privileges. Fixes bug 782. Patch from
1612 Christopher Davis. Bugfix on 0.1.2.1-alpha.
1613 - Try to attach connections immediately upon receiving a RENDEZVOUS2
1614 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
1615 on the client side when connecting to a hidden service. Bugfix
1616 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
1617 - When closing an application-side connection because its circuit is
1618 getting torn down, generate the stream event correctly. Bugfix on
1619 0.1.2.x. Anonymous patch.
1622 Changes in version 0.2.1.5-alpha - 2008-08-31
1623 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
1624 in a lot of the infrastructure for adding authorization to hidden
1625 services, lays the groundwork for having clients read their load
1626 balancing information out of the networkstatus consensus rather than
1627 the individual router descriptors, addresses two potential anonymity
1628 issues, and fixes a variety of smaller issues.
1631 - Convert many internal address representations to optionally hold
1633 - Generate and accept IPv6 addresses in many protocol elements.
1634 - Make resolver code handle nameservers located at ipv6 addresses.
1635 - Begin implementation of proposal 121 ("Client authorization for
1636 hidden services"): configure hidden services with client
1637 authorization, publish descriptors for them, and configure
1638 authorization data for hidden services at clients. The next
1639 step is to actually access hidden services that perform client
1641 - More progress toward proposal 141: Network status consensus
1642 documents and votes now contain bandwidth information for each
1643 router and a summary of that router's exit policy. Eventually this
1644 will be used by clients so that they do not have to download every
1645 known descriptor before building circuits.
1647 o Major bugfixes (on 0.2.0.x and before):
1648 - When sending CREATED cells back for a given circuit, use a 64-bit
1649 connection ID to find the right connection, rather than an addr:port
1650 combination. Now that we can have multiple OR connections between
1651 the same ORs, it is no longer possible to use addr:port to uniquely
1652 identify a connection.
1653 - Relays now reject risky extend cells: if the extend cell includes
1654 a digest of all zeroes, or asks to extend back to the relay that
1655 sent the extend cell, tear down the circuit. Ideas suggested
1657 - If not enough of our entry guards are available so we add a new
1658 one, we might use the new one even if it overlapped with the
1659 current circuit's exit relay (or its family). Anonymity bugfix
1660 pointed out by rovv.
1663 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
1664 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
1665 - When using the TransPort option on OpenBSD, and using the User
1666 option to change UID and drop privileges, make sure to open /dev/pf
1667 before dropping privileges. Fixes bug 782. Patch from Christopher
1668 Davis. Bugfix on 0.1.2.1-alpha.
1669 - Correctly detect the presence of the linux/netfilter_ipv4.h header
1670 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
1671 - Add a missing safe_str() call for a debug log message.
1672 - Use 64 bits instead of 32 bits for connection identifiers used with
1673 the controller protocol, to greatly reduce risk of identifier reuse.
1674 - Make the autoconf script accept the obsolete --with-ssl-dir
1675 option as an alias for the actually-working --with-openssl-dir
1676 option. Fix the help documentation to recommend --with-openssl-dir.
1677 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
1680 - Rate-limit too-many-sockets messages: when they happen, they happen
1681 a lot. Resolves bug 748.
1682 - Resist DNS poisoning a little better by making sure that names in
1683 answer sections match.
1684 - Print the SOCKS5 error message string as well as the error code
1685 when a tor-resolve request fails. Patch from Jacob.
1688 Changes in version 0.2.1.4-alpha - 2008-08-04
1689 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
1692 - The address part of exit policies was not correctly written
1693 to router descriptors. This generated router descriptors that failed
1694 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
1696 - Tor triggered a false assert when extending a circuit to a relay
1697 but we already have a connection open to that relay. Noticed by
1698 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
1701 - Fix a hidden service logging bug: in some edge cases, the router
1702 descriptor of a previously picked introduction point becomes
1703 obsolete and we need to give up on it rather than continually
1704 complaining that it has become obsolete. Observed by xiando. Bugfix
1708 - Take out the TestVia config option, since it was a workaround for
1709 a bug that was fixed in Tor 0.1.1.21.
1712 Changes in version 0.2.1.3-alpha - 2008-08-03
1713 Tor 0.2.1.3-alpha implements most of the pieces to prevent
1714 infinite-length circuit attacks (see proposal 110); fixes a bug that
1715 might cause exit relays to corrupt streams they send back; allows
1716 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
1717 ExcludeExitNodes config options; and fixes a big pile of bugs.
1719 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
1720 - Send a bootstrap problem "warn" event on the first problem if the
1721 reason is NO_ROUTE (that is, our network is down).
1724 - Implement most of proposal 110: The first K cells to be sent
1725 along a circuit are marked as special "early" cells; only K "early"
1726 cells will be allowed. Once this code is universal, we can block
1727 certain kinds of DOS attack by requiring that EXTEND commands must
1728 be sent using an "early" cell.
1731 - Try to attach connections immediately upon receiving a RENDEZVOUS2
1732 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
1733 on the client side when connecting to a hidden service. Bugfix
1734 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
1735 - Ensure that two circuits can never exist on the same connection
1736 with the same circuit ID, even if one is marked for close. This
1737 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
1740 - When relays do their initial bandwidth measurement, don't limit
1741 to just our entry guards for the test circuits. Otherwise we tend
1742 to have multiple test circuits going through a single entry guard,
1743 which makes our bandwidth test less accurate. Fixes part of bug 654;
1744 patch contributed by Josh Albrecht.
1745 - Add an ExcludeExitNodes option so users can list a set of nodes
1746 that should be be excluded from the exit node position, but
1747 allowed elsewhere. Implements proposal 151.
1748 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
1749 ExcludeNodes and ExcludeExitNodes lists.
1750 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
1751 be more efficient. Formerly it was quadratic in the number of
1752 servers; now it should be linear. Fixes bug 509.
1753 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
1754 and n_conn_id_digest fields into a separate structure that's
1755 only needed when the circuit has not yet attached to an n_conn.
1758 - Change the contrib/tor.logrotate script so it makes the new
1759 logs as "_tor:_tor" rather than the default, which is generally
1760 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
1761 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1762 warnings (occasionally), but it can also cause the compiler to
1763 eliminate error-checking code. Suggested by Peter Gutmann.
1764 - When a hidden service is giving up on an introduction point candidate
1765 that was not included in the last published rendezvous descriptor,
1766 don't reschedule publication of the next descriptor. Fixes bug 763.
1768 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
1769 HiddenServiceExcludeNodes as obsolete: they never worked properly,
1770 and nobody claims to be using them. Fixes bug 754. Bugfix on
1771 0.1.0.1-rc. Patch from Christian Wilms.
1772 - Fix a small alignment and memory-wasting bug on buffer chunks.
1775 o Minor bugfixes (controller):
1776 - When closing an application-side connection because its circuit
1777 is getting torn down, generate the stream event correctly.
1778 Bugfix on 0.1.2.x. Anonymous patch.
1781 - Remove all backward-compatibility code to support relays running
1782 versions of Tor so old that they no longer work at all on the
1786 Changes in version 0.2.0.30 - 2008-07-15
1788 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1789 warnings (occasionally), but it can also cause the compiler to
1790 eliminate error-checking code. Suggested by Peter Gutmann.
1793 Changes in version 0.2.0.29-rc - 2008-07-08
1794 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
1795 hidden-service performance bugs, and fixes a bunch of smaller bugs.
1798 - If you have more than one bridge but don't know their keys,
1799 you would only launch a request for the descriptor of the first one
1800 on your list. (Tor considered launching requests for the others, but
1801 found that it already had a connection on the way for $0000...0000
1802 so it didn't open another.) Bugfix on 0.2.0.x.
1803 - If you have more than one bridge but don't know their keys, and the
1804 connection to one of the bridges failed, you would cancel all
1805 pending bridge connections. (After all, they all have the same
1806 digest.) Bugfix on 0.2.0.x.
1807 - When a hidden service was trying to establish an introduction point,
1808 and Tor had built circuits preemptively for such purposes, we
1809 were ignoring all the preemptive circuits and launching a new one
1810 instead. Bugfix on 0.2.0.14-alpha.
1811 - When a hidden service was trying to establish an introduction point,
1812 and Tor *did* manage to reuse one of the preemptively built
1813 circuits, it didn't correctly remember which one it used,
1814 so it asked for another one soon after, until there were no
1815 more preemptive circuits, at which point it launched one from
1816 scratch. Bugfix on 0.0.9.x.
1817 - Make directory servers include the X-Your-Address-Is: http header in
1818 their responses even for begin_dir conns. Now clients who only
1819 ever use begin_dir connections still have a way to learn their IP
1820 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
1823 - Fix a macro/CPP interaction that was confusing some compilers:
1824 some GCCs don't like #if/#endif pairs inside macro arguments.
1826 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
1827 Fixes bug 704; fix from Steven Murdoch.
1828 - When opening /dev/null in finish_daemonize(), do not pass the
1829 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
1830 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
1831 - Correctly detect transparent proxy support on Linux hosts that
1832 require in.h to be included before netfilter_ipv4.h. Patch
1834 - Disallow session resumption attempts during the renegotiation
1835 stage of the v2 handshake protocol. Clients should never be trying
1836 session resumption at this point, but apparently some did, in
1837 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
1838 found by Geoff Goodell.
1841 Changes in version 0.2.1.2-alpha - 2008-06-20
1842 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
1843 make it easier to set up your own private Tor network; fixes several
1844 big bugs with using more than one bridge relay; fixes a big bug with
1845 offering hidden services quickly after Tor starts; and uses a better
1846 API for reporting potential bootstrapping problems to the controller.
1849 - New TestingTorNetwork config option to allow adjustment of
1850 previously constant values that, while reasonable, could slow
1851 bootstrapping. Implements proposal 135. Patch from Karsten.
1854 - If you have more than one bridge but don't know their digests,
1855 you would only learn a request for the descriptor of the first one
1856 on your list. (Tor considered launching requests for the others, but
1857 found that it already had a connection on the way for $0000...0000
1858 so it didn't open another.) Bugfix on 0.2.0.x.
1859 - If you have more than one bridge but don't know their digests,
1860 and the connection to one of the bridges failed, you would cancel
1861 all pending bridge connections. (After all, they all have the
1862 same digest.) Bugfix on 0.2.0.x.
1863 - When establishing a hidden service, introduction points that
1864 originate from cannibalized circuits are completely ignored and not
1865 included in rendezvous service descriptors. This might be another
1866 reason for delay in making a hidden service available. Bugfix
1867 from long ago (0.0.9.x?)
1870 - Allow OpenSSL to use dynamic locks if it wants.
1871 - When building a consensus, do not include routers that are down.
1872 This will cut down 30% to 40% on consensus size. Implements
1874 - In directory authorities' approved-routers files, allow
1875 fingerprints with or without space.
1876 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
1877 controller can query our current bootstrap state in case it attaches
1878 partway through and wants to catch up.
1879 - Send an initial "Starting" bootstrap status event, so we have a
1880 state to start out in.
1883 - Asking for a conditional consensus at .../consensus/<fingerprints>
1884 would crash a dirserver if it did not already have a
1885 consensus. Bugfix on 0.2.1.1-alpha.
1886 - Clean up some macro/CPP interactions: some GCC versions don't like
1887 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
1890 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
1891 - Directory authorities shouldn't complain about bootstrapping
1892 problems just because they do a lot of reachability testing and
1893 some of the connection attempts fail.
1894 - Start sending "count" and "recommendation" key/value pairs in
1895 bootstrap problem status events, so the controller can hear about
1896 problems even before Tor decides they're worth reporting for sure.
1897 - If you're using bridges, generate "bootstrap problem" warnings
1898 as soon as you run out of working bridges, rather than waiting
1899 for ten failures -- which will never happen if you have less than
1901 - If we close our OR connection because there's been a circuit
1902 pending on it for too long, we were telling our bootstrap status
1903 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
1906 Changes in version 0.2.1.1-alpha - 2008-06-13
1907 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
1908 were making the Tor process bloat especially on Linux; makes our TLS
1909 handshake blend in better; sends "bootstrap phase" status events to
1910 the controller, so it can keep the user informed of progress (and
1911 problems) fetching directory information and establishing circuits;
1912 and adds a variety of smaller features.
1915 - More work on making our TLS handshake blend in: modify the list
1916 of ciphers advertised by OpenSSL in client mode to even more
1917 closely resemble a common web browser. We cheat a little so that
1918 we can advertise ciphers that the locally installed OpenSSL doesn't
1920 - Start sending "bootstrap phase" status events to the controller,
1921 so it can keep the user informed of progress fetching directory
1922 information and establishing circuits. Also inform the controller
1923 if we think we're stuck at a particular bootstrap phase. Implements
1925 - Resume using OpenSSL's RAND_poll() for better (and more portable)
1926 cross-platform entropy collection again. We used to use it, then
1927 stopped using it because of a bug that could crash systems that
1928 called RAND_poll when they had a lot of fds open. It looks like the
1929 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
1930 at startup, and to call RAND_poll() when we reseed later only if
1931 we have a non-buggy OpenSSL version.
1934 - When we choose to abandon a new entry guard because we think our
1935 older ones might be better, close any circuits pending on that
1936 new entry guard connection. This fix should make us recover much
1937 faster when our network is down and then comes back. Bugfix on
1938 0.1.2.8-beta; found by lodger.
1940 o Memory fixes and improvements:
1941 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
1942 to avoid unused RAM in buffer chunks and memory pools.
1943 - Speed up parsing and cut down on memory fragmentation by using
1944 stack-style allocations for parsing directory objects. Previously,
1945 this accounted for over 40% of allocations from within Tor's code
1946 on a typical directory cache.
1947 - Use a Bloom filter rather than a digest-based set to track which
1948 descriptors we need to keep around when we're cleaning out old
1949 router descriptors. This speeds up the computation significantly,
1950 and may reduce fragmentation.
1951 - Reduce the default smartlist size from 32 to 16; it turns out that
1952 most smartlists hold around 8-12 elements tops.
1953 - Make dumpstats() log the fullness and size of openssl-internal
1955 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
1956 patch to their OpenSSL, turn it on to save memory on servers. This
1957 patch will (with any luck) get included in a mainline distribution
1959 - Never use OpenSSL compression: it wastes RAM and CPU trying to
1960 compress cells, which are basically all encrypted, compressed,
1964 - Stop reloading the router list from disk for no reason when we
1965 run out of reachable directory mirrors. Once upon a time reloading
1966 it would set the 'is_running' flag back to 1 for them. It hasn't
1967 done that for a long time.
1968 - In very rare situations new hidden service descriptors were
1969 published earlier than 30 seconds after the last change to the
1970 service. (We currently think that a hidden service descriptor
1971 that's been stable for 30 seconds is worth publishing.)
1974 - Allow separate log levels to be configured for different logging
1975 domains. For example, this allows one to log all notices, warnings,
1976 or errors, plus all memory management messages of level debug or
1977 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
1978 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
1979 and stop using a warning that had become unfixably verbose under
1981 - New --hush command-line option similar to --quiet. While --quiet
1982 disables all logging to the console on startup, --hush limits the
1983 output to messages of warning and error severity.
1984 - Servers support a new URL scheme for consensus downloads that
1985 allows the client to specify which authorities are trusted.
1986 The server then only sends the consensus if the client will trust
1987 it. Otherwise a 404 error is sent back. Clients use this
1988 new scheme when the server supports it (meaning it's running
1989 0.2.1.1-alpha or later). Implements proposal 134.
1990 - New configure/torrc options (--enable-geoip-stats,
1991 DirRecordUsageByCountry) to record how many IPs we've served
1992 directory info to in each country code, how many status documents
1993 total we've sent to each country code, and what share of the total
1994 directory requests we should expect to see.
1995 - Use the TLS1 hostname extension to more closely resemble browser
1997 - Lots of new unit tests.
1998 - Add a macro to implement the common pattern of iterating through
1999 two parallel lists in lockstep.
2002 Changes in version 0.2.0.28-rc - 2008-06-13
2003 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
2004 performance bug, and fixes a bunch of smaller bugs.
2007 - Fix a bug where, when we were choosing the 'end stream reason' to
2008 put in our relay end cell that we send to the exit relay, Tor
2009 clients on Windows were sometimes sending the wrong 'reason'. The
2010 anonymity problem is that exit relays may be able to guess whether
2011 the client is running Windows, thus helping partition the anonymity
2012 set. Down the road we should stop sending reasons to exit relays,
2013 or otherwise prevent future versions of this bug.
2016 - While setting up a hidden service, some valid introduction circuits
2017 were overlooked and abandoned. This might be the reason for
2018 the long delay in making a hidden service available. Bugfix on
2022 - Update to the "June 9 2008" ip-to-country file.
2023 - Run 'make test' as part of 'make dist', so we stop releasing so
2024 many development snapshots that fail their unit tests.
2027 - When we're checking if we have enough dir info for each relay
2028 to begin establishing circuits, make sure that we actually have
2029 the descriptor listed in the consensus, not just any descriptor.
2031 - Bridge relays no longer print "xx=0" in their extrainfo document
2032 for every single country code in the geoip db. Bugfix on
2034 - Only warn when we fail to load the geoip file if we were planning to
2035 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
2036 - If we change our MaxAdvertisedBandwidth and then reload torrc,
2037 Tor won't realize it should publish a new relay descriptor. Fixes
2038 bug 688, reported by mfr. Bugfix on 0.1.2.x.
2039 - When we haven't had any application requests lately, don't bother
2040 logging that we have expired a bunch of descriptors. Bugfix
2042 - Make relay cells written on a connection count as non-padding when
2043 tracking how long a connection has been in use. Bugfix on
2044 0.2.0.1-alpha. Spotted by lodger.
2045 - Fix unit tests in 0.2.0.27-rc.
2046 - Fix compile on Windows.
2049 Changes in version 0.2.0.27-rc - 2008-06-03
2050 Tor 0.2.0.27-rc adds a few features we left out of the earlier
2051 release candidates. In particular, we now include an IP-to-country
2052 GeoIP database, so controllers can easily look up what country a
2053 given relay is in, and so bridge relays can give us some sanitized
2054 summaries about which countries are making use of bridges. (See proposal
2055 126-geoip-fetching.txt for details.)
2058 - Include an IP-to-country GeoIP file in the tarball, so bridge
2059 relays can report sanitized summaries of the usage they're seeing.
2062 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
2063 Robert Hogan. Fixes the first part of bug 681.
2064 - Make bridge authorities never serve extrainfo docs.
2065 - Add support to detect Libevent versions in the 1.4.x series
2067 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
2068 - Include a new contrib/tor-exit-notice.html file that exit relay
2069 operators can put on their website to help reduce abuse queries.
2072 - When tunneling an encrypted directory connection, and its first
2073 circuit fails, do not leave it unattached and ask the controller
2074 to deal. Fixes the second part of bug 681.
2075 - Make bridge authorities correctly expire old extrainfo documents
2079 Changes in version 0.2.0.26-rc - 2008-05-13
2080 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
2081 in Debian's OpenSSL packages. All users running any 0.2.0.x version
2082 should upgrade, whether they're running Debian or not.
2084 o Major security fixes:
2085 - Use new V3 directory authority keys on the tor26, gabelmoo, and
2086 moria1 V3 directory authorities. The old keys were generated with
2087 a vulnerable version of Debian's OpenSSL package, and must be
2088 considered compromised. Other authorities' keys were not generated
2089 with an affected version of OpenSSL.
2092 - List authority signatures as "unrecognized" based on DirServer
2093 lines, not on cert cache. Bugfix on 0.2.0.x.
2096 - Add a new V3AuthUseLegacyKey option to make it easier for
2097 authorities to change their identity keys if they have to.
2100 Changes in version 0.2.0.25-rc - 2008-04-23
2101 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
2104 - Remember to initialize threading before initializing logging.
2105 Otherwise, many BSD-family implementations will crash hard on
2106 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
2109 - Authorities correctly free policies on bad servers on
2110 exit. Fixes bug 672. Bugfix on 0.2.0.x.
2113 Changes in version 0.2.0.24-rc - 2008-04-22
2114 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
2115 v3 directory authority, makes relays with dynamic IP addresses and no
2116 DirPort notice more quickly when their IP address changes, fixes a few
2117 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
2119 o New directory authorities:
2120 - Take lefkada out of the list of v3 directory authorities, since
2121 it has been down for months.
2122 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
2126 - Detect address changes more quickly on non-directory mirror
2127 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
2129 o Minor features (security):
2130 - Reject requests for reverse-dns lookup of names that are in
2131 a private address space. Patch from lodger.
2132 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
2135 o Minor bugfixes (crashes):
2136 - Avoid a rare assert that can trigger when Tor doesn't have much
2137 directory information yet and it tries to fetch a v2 hidden
2138 service descriptor. Fixes bug 651, reported by nwf.
2139 - Initialize log mutex before initializing dmalloc. Otherwise,
2140 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
2141 - Use recursive pthread mutexes in order to avoid deadlock when
2142 logging debug-level messages to a controller. Bug spotted by nwf,
2143 bugfix on 0.2.0.16-alpha.
2145 o Minor bugfixes (resource management):
2146 - Keep address policies from leaking memory: start their refcount
2147 at 1, not 2. Bugfix on 0.2.0.16-alpha.
2148 - Free authority certificates on exit, so they don't look like memory
2149 leaks. Bugfix on 0.2.0.19-alpha.
2150 - Free static hashtables for policy maps and for TLS connections on
2151 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
2152 - Avoid allocating extra space when computing consensuses on 64-bit
2153 platforms. Bug spotted by aakova.
2155 o Minor bugfixes (misc):
2156 - Do not read the configuration file when we've only been told to
2157 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
2158 based on patch from Sebastian Hahn.
2159 - Exit relays that are used as a client can now reach themselves
2160 using the .exit notation, rather than just launching an infinite
2161 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
2162 - When attempting to open a logfile fails, tell us why.
2163 - Fix a dumb bug that was preventing us from knowing that we should
2164 preemptively build circuits to handle expected directory requests.
2165 Fixes bug 660. Bugfix on 0.1.2.x.
2166 - Warn less verbosely about clock skew from netinfo cells from
2167 untrusted sources. Fixes bug 663.
2168 - Make controller stream events for DNS requests more consistent,
2169 by adding "new stream" events for DNS requests, and removing
2170 spurious "stream closed" events" for cached reverse resolves.
2171 Patch from mwenge. Fixes bug 646.
2172 - Correctly notify one-hop connections when a circuit build has
2173 failed. Possible fix for bug 669. Found by lodger.
2176 Changes in version 0.2.0.23-rc - 2008-03-24
2177 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
2178 makes bootstrapping faster if the first directory mirror you contact
2179 is down. The bundles also include the new Vidalia 0.1.2 release.
2182 - When a tunneled directory request is made to a directory server
2183 that's down, notice after 30 seconds rather than 120 seconds. Also,
2184 fail any begindir streams that are pending on it, so they can
2185 retry elsewhere. This was causing multi-minute delays on bootstrap.
2188 Changes in version 0.2.0.22-rc - 2008-03-18
2189 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
2190 enables encrypted directory connections by default for non-relays, fixes
2191 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
2192 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
2195 - Enable encrypted directory connections by default for non-relays,
2196 so censor tools that block Tor directory connections based on their
2197 plaintext patterns will no longer work. This means Tor works in
2198 certain censored countries by default again.
2201 - Make sure servers always request certificates from clients during
2202 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
2203 - Do not enter a CPU-eating loop when a connection is closed in
2204 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
2205 diagnosed by lodger; bugfix on 0.2.0.20-rc.
2206 - Fix assertion failure that could occur when a blocked circuit
2207 became unblocked, and it had pending client DNS requests. Bugfix
2208 on 0.2.0.1-alpha. Fixes bug 632.
2210 o Minor bugfixes (on 0.1.2.x):
2211 - Generate "STATUS_SERVER" events rather than misspelled
2212 "STATUS_SEVER" events. Caught by mwenge.
2213 - When counting the number of bytes written on a TLS connection,
2214 look at the BIO actually used for writing to the network, not
2215 at the BIO used (sometimes) to buffer data for the network.
2216 Looking at different BIOs could result in write counts on the
2217 order of ULONG_MAX. Fixes bug 614.
2218 - On Windows, correctly detect errors when listing the contents of
2219 a directory. Fix from lodger.
2221 o Minor bugfixes (on 0.2.0.x):
2222 - Downgrade "sslv3 alert handshake failure" message to INFO.
2223 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
2224 left BandwidthRate and BandwidthBurst at the default, we would be
2225 silently limited by those defaults. Now raise them to match the
2226 RelayBandwidth* values.
2227 - Fix the SVK version detection logic to work correctly on a branch.
2228 - Make --enable-openbsd-malloc work correctly on Linux with alpha
2229 CPUs. Fixes bug 625.
2230 - Logging functions now check that the passed severity is sane.
2231 - Use proper log levels in the testsuite call of
2232 get_interface_address6().
2233 - When using a nonstandard malloc, do not use the platform values for
2234 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
2235 - Make the openbsd malloc code use 8k pages on alpha CPUs and
2237 - Detect mismatched page sizes when using --enable-openbsd-malloc.
2238 - Avoid double-marked-for-close warning when certain kinds of invalid
2239 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
2240 for bug 617. Bugfix on 0.2.0.1-alpha.
2241 - Make sure that the "NULL-means-reject *:*" convention is followed by
2242 all the policy manipulation functions, avoiding some possible crash
2243 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
2244 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
2245 actually works, and doesn't warn about every single reverse lookup.
2246 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
2249 - Only log guard node status when guard node status has changed.
2250 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
2251 make "INFO" 75% less verbose.
2254 Changes in version 0.2.0.21-rc - 2008-03-02
2255 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
2256 makes Tor work well with Vidalia again, fixes a rare assert bug,
2257 and fixes a pair of more minor bugs. The bundles also include Vidalia
2258 0.1.0 and Torbutton 1.1.16.
2261 - The control port should declare that it requires password auth
2262 when HashedControlSessionPassword is set too. Patch from Matt Edman;
2263 bugfix on 0.2.0.20-rc. Fixes bug 615.
2264 - Downgrade assert in connection_buckets_decrement() to a log message.
2265 This may help us solve bug 614, and in any case will make its
2266 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
2267 - We were sometimes miscounting the number of bytes read from the
2268 network, causing our rate limiting to not be followed exactly.
2269 Bugfix on 0.2.0.16-alpha. Reported by lodger.
2272 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
2273 OpenSSL versions should have been working fine. Diagnosis and patch
2274 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
2275 Bugfix on 0.2.0.20-rc.
2278 Changes in version 0.2.0.20-rc - 2008-02-24
2279 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
2280 makes more progress towards normalizing Tor's TLS handshake, makes
2281 hidden services work better again, helps relays bootstrap if they don't
2282 know their IP address, adds optional support for linking in openbsd's
2283 allocator or tcmalloc, allows really fast relays to scale past 15000
2284 sockets, and fixes a bunch of minor bugs reported by Veracode.
2287 - Enable the revised TLS handshake based on the one designed by
2288 Steven Murdoch in proposal 124, as revised in proposal 130. It
2289 includes version negotiation for OR connections as described in
2290 proposal 105. The new handshake is meant to be harder for censors
2291 to fingerprint, and it adds the ability to detect certain kinds of
2292 man-in-the-middle traffic analysis attacks. The version negotiation
2293 feature will allow us to improve Tor's link protocol more safely
2295 - Choose which bridge to use proportional to its advertised bandwidth,
2296 rather than uniformly at random. This should speed up Tor for
2297 bridge users. Also do this for people who set StrictEntryNodes.
2298 - When a TrackHostExits-chosen exit fails too many times in a row,
2299 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
2302 - Resolved problems with (re-)fetching hidden service descriptors.
2303 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
2305 - If we only ever used Tor for hidden service lookups or posts, we
2306 would stop building circuits and start refusing connections after
2307 24 hours, since we falsely believed that Tor was dormant. Reported
2308 by nwf; bugfix on 0.1.2.x.
2309 - Servers that don't know their own IP address should go to the
2310 authorities for their first directory fetch, even if their DirPort
2311 is off or if they don't know they're reachable yet. This will help
2312 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
2313 - When counting the number of open sockets, count not only the number
2314 of sockets we have received from the socket() call, but also
2315 the number we've gotten from accept() and socketpair(). This bug
2316 made us fail to count all sockets that we were using for incoming
2317 connections. Bugfix on 0.2.0.x.
2318 - Fix code used to find strings within buffers, when those strings
2319 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
2320 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
2321 - Add a new __HashedControlSessionPassword option for controllers
2322 to use for one-off session password hashes that shouldn't get
2323 saved to disk by SAVECONF --- Vidalia users were accumulating a
2324 pile of HashedControlPassword lines in their torrc files, one for
2325 each time they had restarted Tor and then clicked Save. Make Tor
2326 automatically convert "HashedControlPassword" to this new option but
2327 only when it's given on the command line. Partial fix for bug 586.
2329 o Minor features (performance):
2330 - Tune parameters for cell pool allocation to minimize amount of
2332 - Add OpenBSD malloc code from phk as an optional malloc
2333 replacement on Linux: some glibc libraries do very poorly
2334 with Tor's memory allocation patterns. Pass
2335 --enable-openbsd-malloc to get the replacement malloc code.
2336 - Add a --with-tcmalloc option to the configure script to link
2337 against tcmalloc (if present). Does not yet search for
2338 non-system include paths.
2339 - Stop imposing an arbitrary maximum on the number of file descriptors
2340 used for busy servers. Bug reported by Olaf Selke; patch from
2343 o Minor features (other):
2344 - When SafeLogging is disabled, log addresses along with all TLS
2346 - When building with --enable-gcc-warnings, check for whether Apple's
2347 warning "-Wshorten-64-to-32" is available.
2348 - Add a --passphrase-fd argument to the tor-gencert command for
2351 o Minor bugfixes (memory leaks and code problems):
2352 - We were leaking a file descriptor if Tor started with a zero-length
2353 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
2354 - Detect size overflow in zlib code. Reported by Justin Ferguson and
2356 - We were comparing the raw BridgePassword entry with a base64'ed
2357 version of it, when handling a "/tor/networkstatus-bridges"
2358 directory request. Now compare correctly. Noticed by Veracode.
2359 - Recover from bad tracked-since value in MTBF-history file.
2361 - Alter the code that tries to recover from unhandled write
2362 errors, to not try to flush onto a socket that's given us
2363 unhandled errors. Bugfix on 0.1.2.x.
2364 - Make Unix controlsockets work correctly on OpenBSD. Patch from
2365 tup. Bugfix on 0.2.0.3-alpha.
2367 o Minor bugfixes (other):
2368 - If we have an extra-info document for our server, always make
2369 it available on the control port, even if we haven't gotten
2370 a copy of it from an authority yet. Patch from mwenge.
2371 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
2372 - Directory mirrors no longer include a guess at the client's IP
2373 address if the connection appears to be coming from the same /24
2374 network; it was producing too many wrong guesses.
2375 - Make the new hidden service code respect the SafeLogging setting.
2376 Bugfix on 0.2.0.x. Patch from Karsten.
2377 - When starting as an authority, do not overwrite all certificates
2378 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
2379 - If we're trying to flush the last bytes on a connection (for
2380 example, when answering a directory request), reset the
2381 time-to-give-up timeout every time we manage to write something
2382 on the socket. Bugfix on 0.1.2.x.
2383 - Change the behavior of "getinfo status/good-server-descriptor"
2384 so it doesn't return failure when any authority disappears.
2385 - Even though the man page said that "TrackHostExits ." should
2386 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
2387 - Report TLS "zero return" case as a "clean close" and "IO error"
2388 as a "close". Stop calling closes "unexpected closes": existing
2389 Tors don't use SSL_close(), so having a connection close without
2390 the TLS shutdown handshake is hardly unexpected.
2391 - Send NAMESERVER_STATUS messages for a single failed nameserver
2394 o Code simplifications and refactoring:
2395 - Remove the tor_strpartition function: its logic was confused,
2396 and it was only used for one thing that could be implemented far
2400 Changes in version 0.2.0.19-alpha - 2008-02-09
2401 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
2402 handshake, makes path selection for relays more secure and IP address
2403 guessing more robust, and generally fixes a lot of bugs in preparation
2404 for calling the 0.2.0 branch stable.
2407 - Do not include recognizeable strings in the commonname part of
2408 Tor's x509 certificates.
2411 - If we're a relay, avoid picking ourselves as an introduction point,
2412 a rendezvous point, or as the final hop for internal circuits. Bug
2413 reported by taranis and lodger. Bugfix on 0.1.2.x.
2414 - Patch from "Andrew S. Lists" to catch when we contact a directory
2415 mirror at IP address X and he says we look like we're coming from
2416 IP address X. Bugfix on 0.1.2.x.
2418 o Minor features (security):
2419 - Be more paranoid about overwriting sensitive memory on free(),
2420 as a defensive programming tactic to ensure forward secrecy.
2422 o Minor features (directory authority):
2423 - Actually validate the options passed to AuthDirReject,
2424 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
2425 - Reject router descriptors with out-of-range bandwidthcapacity or
2426 bandwidthburst values.
2428 o Minor features (controller):
2429 - Reject controller commands over 1MB in length. This keeps rogue
2430 processes from running us out of memory.
2432 o Minor features (misc):
2433 - Give more descriptive well-formedness errors for out-of-range
2434 hidden service descriptor/protocol versions.
2435 - Make memory debugging information describe more about history
2436 of cell allocation, so we can help reduce our memory use.
2438 o Deprecated features (controller):
2439 - The status/version/num-versioning and status/version/num-concurring
2440 GETINFO options are no longer useful in the v3 directory protocol:
2441 treat them as deprecated, and warn when they're used.
2444 - When our consensus networkstatus has been expired for a while, stop
2445 being willing to build circuits using it. Fixes bug 401. Bugfix
2447 - Directory caches now fetch certificates from all authorities
2448 listed in a networkstatus consensus, even when they do not
2449 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
2450 - When connecting to a bridge without specifying its key, insert
2451 the connection into the identity-to-connection map as soon as
2452 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
2453 - Detect versions of OS X where malloc_good_size() is present in the
2454 library but never actually declared. Resolves bug 587. Bugfix
2456 - Stop incorrectly truncating zlib responses to directory authority
2457 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
2458 - Stop recommending that every server operator send mail to tor-ops.
2459 Resolves bug 597. Bugfix on 0.1.2.x.
2460 - Don't trigger an assert if we start a directory authority with a
2461 private IP address (like 127.0.0.1).
2462 - Avoid possible failures when generating a directory with routers
2463 with over-long versions strings, or too many flags set. Bugfix
2465 - If an attempt to launch a DNS resolve request over the control
2466 port fails because we have overrun the limit on the number of
2467 connections, tell the controller that the request has failed.
2468 - Avoid using too little bandwidth when our clock skips a few
2469 seconds. Bugfix on 0.1.2.x.
2470 - Fix shell error when warning about missing packages in configure
2471 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
2472 - Do not become confused when receiving a spurious VERSIONS-like
2473 cell from a confused v1 client. Bugfix on 0.2.0.x.
2474 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
2475 introduction points for a hidden service have failed. Patch from
2476 Karsten Loesing. Bugfix on 0.2.0.x.
2478 o Code simplifications and refactoring:
2479 - Remove some needless generality from cpuworker code, for improved
2481 - Stop overloading the circuit_t.onionskin field for both "onionskin
2482 from a CREATE cell that we are waiting for a cpuworker to be
2483 assigned" and "onionskin from an EXTEND cell that we are going to
2484 send to an OR as soon as we are connected". Might help with bug 600.
2485 - Add an in-place version of aes_crypt() so that we can avoid doing a
2486 needless memcpy() call on each cell payload.
2489 Changes in version 0.2.0.18-alpha - 2008-01-25
2490 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
2491 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
2492 that can warn or reject connections to ports generally associated with
2493 vulnerable-plaintext protocols.
2495 o New directory authorities:
2496 - Set up dannenberg (run by CCC) as the sixth v3 directory
2500 - Fix a major memory leak when attempting to use the v2 TLS
2501 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
2502 - We accidentally enabled the under-development v2 TLS handshake
2503 code, which was causing log entries like "TLS error while
2504 renegotiating handshake". Disable it again. Resolves bug 590.
2505 - We were computing the wrong Content-Length: header for directory
2506 responses that need to be compressed on the fly, causing clients
2507 asking for those items to always fail. Bugfix on 0.2.0.x; partially
2511 - Avoid going directly to the directory authorities even if you're a
2512 relay, if you haven't found yourself reachable yet or if you've
2513 decided not to advertise your dirport yet. Addresses bug 556.
2514 - If we've gone 12 hours since our last bandwidth check, and we
2515 estimate we have less than 50KB bandwidth capacity but we could
2516 handle more, do another bandwidth test.
2517 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
2518 Tor can warn and/or refuse connections to ports commonly used with
2519 vulnerable-plaintext protocols. Currently we warn on ports 23,
2520 109, 110, and 143, but we don't reject any.
2523 - When we setconf ClientOnly to 1, close any current OR and Dir
2524 listeners. Reported by mwenge.
2525 - When we get a consensus that's been signed by more people than
2526 we expect, don't log about it; it's not a big deal. Reported
2530 - Don't answer "/tor/networkstatus-bridges" directory requests if
2531 the request isn't encrypted.
2532 - Make "ClientOnly 1" config option disable directory ports too.
2533 - Patches from Karsten Loesing to make v2 hidden services more
2534 robust: work even when there aren't enough HSDir relays available;
2535 retry when a v2 rend desc fetch fails; but don't retry if we
2536 already have a usable v0 rend desc.
2539 Changes in version 0.2.0.17-alpha - 2008-01-17
2540 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
2543 - Make the tor-gencert man page get included correctly in the tarball.
2546 Changes in version 0.2.0.16-alpha - 2008-01-17
2547 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
2548 Loesing, and generally cleans up a lot of features and minor bugs.
2550 o New directory authorities:
2551 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
2554 o Major performance improvements:
2555 - Switch our old ring buffer implementation for one more like that
2556 used by free Unix kernels. The wasted space in a buffer with 1mb
2557 of data will now be more like 8k than 1mb. The new implementation
2558 also avoids realloc();realloc(); patterns that can contribute to
2559 memory fragmentation.
2562 - Configuration files now accept C-style strings as values. This
2563 helps encode characters not allowed in the current configuration
2564 file format, such as newline or #. Addresses bug 557.
2565 - Although we fixed bug 539 (where servers would send HTTP status 503
2566 responses _and_ send a body too), there are still servers out
2567 there that haven't upgraded. Therefore, make clients parse such
2568 bodies when they receive them.
2569 - When we're not serving v2 directory information, there is no reason
2570 to actually keep any around. Remove the obsolete files and directory
2571 on startup if they are very old and we aren't going to serve them.
2573 o Minor performance improvements:
2574 - Reference-count and share copies of address policy entries; only 5%
2575 of them were actually distinct.
2576 - Never walk through the list of logs if we know that no log is
2577 interested in a given message.
2580 - When an authority has not signed a consensus, do not try to
2581 download a nonexistent "certificate with key 00000000". Bugfix
2582 on 0.2.0.x. Fixes bug 569.
2583 - Fix a rare assert error when we're closing one of our threads:
2584 use a mutex to protect the list of logs, so we never write to the
2585 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
2586 bug 575, which is kind of the revenge of bug 222.
2587 - Patch from Karsten Loesing to complain less at both the client
2588 and the relay when a relay used to have the HSDir flag but doesn't
2589 anymore, and we try to upload a hidden service descriptor.
2590 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
2592 - Do not try to download missing certificates until we have tried
2593 to check our fallback consensus. Fixes bug 583.
2594 - Make bridges round reported GeoIP stats info up to the nearest
2595 estimate, not down. Now we can distinguish between "0 people from
2596 this country" and "1 person from this country".
2597 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
2598 - Avoid possible segfault if key generation fails in
2599 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
2600 - Avoid segfault in the case where a badly behaved v2 versioning
2601 directory sends a signed networkstatus with missing client-versions.
2603 - Avoid segfaults on certain complex invocations of
2604 router_get_by_hexdigest(). Bugfix on 0.1.2.
2605 - Correct bad index on array access in parse_http_time(). Bugfix
2607 - Fix possible bug in vote generation when server versions are present
2608 but client versions are not.
2609 - Fix rare bug on REDIRECTSTREAM control command when called with no
2610 port set: it could erroneously report an error when none had
2612 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
2613 compressing large objects and find ourselves with more than 4k
2614 left over. Bugfix on 0.2.0.
2615 - Fix a small memory leak when setting up a hidden service.
2616 - Fix a few memory leaks that could in theory happen under bizarre
2618 - Fix an assert if we post a general-purpose descriptor via the
2619 control port but that descriptor isn't mentioned in our current
2620 network consensus. Bug reported by Jon McLachlan; bugfix on
2623 o Minor features (controller):
2624 - Get NS events working again. Patch from tup.
2625 - The GETCONF command now escapes and quotes configuration values
2626 that don't otherwise fit into the torrc file.
2627 - The SETCONF command now handles quoted values correctly.
2629 o Minor features (directory authorities):
2630 - New configuration options to override default maximum number of
2631 servers allowed on a single IP address. This is important for
2632 running a test network on a single host.
2633 - Actually implement the -s option to tor-gencert.
2634 - Add a manual page for tor-gencert.
2636 o Minor features (bridges):
2637 - Bridge authorities no longer serve bridge descriptors over
2638 unencrypted connections.
2640 o Minor features (other):
2641 - Add hidden services and DNSPorts to the list of things that make
2642 Tor accept that it has running ports. Change starting Tor with no
2643 ports from a fatal error to a warning; we might change it back if
2644 this turns out to confuse anybody. Fixes bug 579.
2647 Changes in version 0.1.2.19 - 2008-01-17
2648 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
2649 exit policy a little bit more conservative so it's safer to run an
2650 exit relay on a home system, and fixes a variety of smaller issues.
2653 - Exit policies now reject connections that are addressed to a
2654 relay's public (external) IP address too, unless
2655 ExitPolicyRejectPrivate is turned off. We do this because too
2656 many relays are running nearby to services that trust them based
2660 - When the clock jumps forward a lot, do not allow the bandwidth
2661 buckets to become negative. Fixes bug 544.
2662 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2663 on every successful resolve. Reported by Mike Perry.
2664 - Purge old entries from the "rephist" database and the hidden
2665 service descriptor database even when DirPort is zero.
2666 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
2667 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
2668 crashing or mis-answering these requests.
2669 - When we decide to send a 503 response to a request for servers, do
2670 not then also send the server descriptors: this defeats the whole
2671 purpose. Fixes bug 539.
2674 - Changing the ExitPolicyRejectPrivate setting should cause us to
2675 rebuild our server descriptor.
2676 - Fix handling of hex nicknames when answering controller requests for
2677 networkstatus by name, or when deciding whether to warn about
2678 unknown routers in a config option. (Patch from mwenge.)
2679 - Fix a couple of hard-to-trigger autoconf problems that could result
2680 in really weird results on platforms whose sys/types.h files define
2681 nonstandard integer types.
2682 - Don't try to create the datadir when running --verify-config or
2683 --hash-password. Resolves bug 540.
2684 - If we were having problems getting a particular descriptor from the
2685 directory caches, and then we learned about a new descriptor for
2686 that router, we weren't resetting our failure count. Reported
2688 - Although we fixed bug 539 (where servers would send HTTP status 503
2689 responses _and_ send a body too), there are still servers out there
2690 that haven't upgraded. Therefore, make clients parse such bodies
2691 when they receive them.
2692 - Run correctly on systems where rlim_t is larger than unsigned long.
2693 This includes some 64-bit systems.
2694 - Run correctly on platforms (like some versions of OS X 10.5) where
2695 the real limit for number of open files is OPEN_FILES, not rlim_max
2696 from getrlimit(RLIMIT_NOFILES).
2697 - Avoid a spurious free on base64 failure.
2698 - Avoid segfaults on certain complex invocations of
2699 router_get_by_hexdigest().
2700 - Fix rare bug on REDIRECTSTREAM control command when called with no
2701 port set: it could erroneously report an error when none had
2705 Changes in version 0.2.0.15-alpha - 2007-12-25
2706 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
2707 features added in 0.2.0.13-alpha.
2710 - Fix several remotely triggerable asserts based on DirPort requests
2711 for a v2 or v3 networkstatus object before we were prepared. This
2712 was particularly bad for 0.2.0.13 and later bridge relays, who
2713 would never have a v2 networkstatus and would thus always crash
2714 when used. Bugfixes on 0.2.0.x.
2715 - Estimate the v3 networkstatus size more accurately, rather than
2716 estimating it at zero bytes and giving it artificially high priority
2717 compared to other directory requests. Bugfix on 0.2.0.x.
2720 - Fix configure.in logic for cross-compilation.
2721 - When we load a bridge descriptor from the cache, and it was
2722 previously unreachable, mark it as retriable so we won't just
2723 ignore it. Also, try fetching a new copy immediately. Bugfixes
2725 - The bridge GeoIP stats were counting other relays, for example
2726 self-reachability and authority-reachability tests.
2729 - Support compilation to target iPhone; patch from cjacker huang.
2730 To build for iPhone, pass the --enable-iphone option to configure.
2733 Changes in version 0.2.0.14-alpha - 2007-12-23
2735 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
2736 without a datadirectory from a previous Tor install. Reported
2738 - Fix a crash when we fetch a descriptor that turns out to be
2739 unexpected (it used to be in our networkstatus when we started
2740 fetching it, but it isn't in our current networkstatus), and we
2741 aren't using bridges. Bugfix on 0.2.0.x.
2742 - Fix a crash when accessing hidden services: it would work the first
2743 time you use a given introduction point for your service, but
2744 on subsequent requests we'd be using garbage memory. Fixed by
2745 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
2746 - Fix a crash when we load a bridge descriptor from disk but we don't
2747 currently have a Bridge line for it in our torrc. Bugfix on
2751 - If bridge authorities set BridgePassword, they will serve a
2752 snapshot of known bridge routerstatuses from their DirPort to
2753 anybody who knows that password. Unset by default.
2756 - Make the unit tests build again.
2757 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
2758 - Make PublishServerDescriptor default to 1, so the default doesn't
2759 have to change as we invent new directory protocol versions.
2760 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
2761 be included unless sys/time.h is already included. Fixes
2762 bug 553. Bugfix on 0.2.0.x.
2763 - If we receive a general-purpose descriptor and then receive an
2764 identical bridge-purpose descriptor soon after, don't discard
2765 the next one as a duplicate.
2768 - If BridgeRelay is set to 1, then the default for
2769 PublishServerDescriptor is now "bridge" rather than "v2,v3".
2770 - If the user sets RelayBandwidthRate but doesn't set
2771 RelayBandwidthBurst, then make them equal rather than erroring out.
2774 Changes in version 0.2.0.13-alpha - 2007-12-21
2775 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
2776 Goodell, fixes many more bugs, and adds a lot of infrastructure for
2779 o New directory authorities:
2780 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
2784 - Only update guard status (usable / not usable) once we have
2785 enough directory information. This was causing us to always pick
2786 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
2787 causing us to discard all our guards on startup if we hadn't been
2788 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
2789 - Purge old entries from the "rephist" database and the hidden
2790 service descriptor databases even when DirPort is zero. Bugfix
2792 - We were ignoring our RelayBandwidthRate for the first 30 seconds
2793 after opening a circuit -- even a relayed circuit. Bugfix on
2795 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
2796 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
2797 crashing or mis-answering these types of requests.
2798 - Relays were publishing their server descriptor to v1 and v2
2799 directory authorities, but they didn't try publishing to v3-only
2800 authorities. Fix this; and also stop publishing to v1 authorities.
2802 - When we were reading router descriptors from cache, we were ignoring
2803 the annotations -- so for example we were reading in bridge-purpose
2804 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
2805 - When we decided to send a 503 response to a request for servers, we
2806 were then also sending the server descriptors: this defeats the
2807 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
2810 - Bridge relays now behave like clients with respect to time
2811 intervals for downloading new consensus documents -- otherwise they
2812 stand out. Bridge users now wait until the end of the interval,
2813 so their bridge relay will be sure to have a new consensus document.
2814 - Three new config options (AlternateDirAuthority,
2815 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
2816 user selectively replace the default directory authorities by type,
2817 rather than the all-or-nothing replacement that DirServer offers.
2818 - Tor can now be configured to read a GeoIP file from disk in one
2819 of two formats. This can be used by controllers to map IP addresses
2820 to countries. Eventually, it may support exit-by-country.
2821 - When possible, bridge relays remember which countries users
2822 are coming from, and report aggregate information in their
2823 extra-info documents, so that the bridge authorities can learn
2824 where Tor is blocked.
2825 - Bridge directory authorities now do reachability testing on the
2826 bridges they know. They provide router status summaries to the
2827 controller via "getinfo ns/purpose/bridge", and also dump summaries
2828 to a file periodically.
2829 - Stop fetching directory info so aggressively if your DirPort is
2830 on but your ORPort is off; stop fetching v2 dir info entirely.
2831 You can override these choices with the new FetchDirInfoEarly
2835 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
2836 consensus documents when there are too many relays at a single
2837 IP address. Now clear it in v2 network status documents too, and
2838 also clear it in routerinfo_t when the relay is no longer listed
2839 in the relevant networkstatus document.
2840 - Don't crash if we get an unexpected value for the
2841 PublishServerDescriptor config option. Reported by Matt Edman;
2842 bugfix on 0.2.0.9-alpha.
2843 - Our new v2 hidden service descriptor format allows descriptors
2844 that have no introduction points. But Tor crashed when we tried
2845 to build a descriptor with no intro points (and it would have
2846 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
2848 - Fix building with dmalloc 5.5.2 with glibc.
2849 - Reject uploaded descriptors and extrainfo documents if they're
2850 huge. Otherwise we'll cache them all over the network and it'll
2851 clog everything up. Reported by Aljosha Judmayer.
2852 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
2853 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
2854 - When the DANGEROUS_VERSION controller status event told us we're
2855 running an obsolete version, it used the string "OLD" to describe
2856 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
2857 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
2858 - If we can't expand our list of entry guards (e.g. because we're
2859 using bridges or we have StrictEntryNodes set), don't mark relays
2860 down when they fail a directory request. Otherwise we're too quick
2861 to mark all our entry points down. Bugfix on 0.1.2.x.
2862 - Fix handling of hex nicknames when answering controller requests for
2863 networkstatus by name, or when deciding whether to warn about unknown
2864 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
2865 - Fix a couple of hard-to-trigger autoconf problems that could result
2866 in really weird results on platforms whose sys/types.h files define
2867 nonstandard integer types. Bugfix on 0.1.2.x.
2868 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
2869 - Don't crash on name lookup when we have no current consensus. Fixes
2870 bug 538; bugfix on 0.2.0.x.
2871 - Only Tors that want to mirror the v2 directory info should
2872 create the "cached-status" directory in their datadir. (All Tors
2873 used to create it.) Bugfix on 0.2.0.9-alpha.
2874 - Directory authorities should only automatically download Extra Info
2875 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
2878 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
2879 consumers. (We already do this on HUP.)
2880 - Authorities and caches fetch the v2 networkstatus documents
2881 less often, now that v3 is encouraged.
2882 - Add a new config option BridgeRelay that specifies you want to
2883 be a bridge relay. Right now the only difference is that it makes
2884 you answer begin_dir requests, and it makes you cache dir info,
2885 even if your DirPort isn't on.
2886 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
2887 ask about source, timestamp of arrival, purpose, etc. We need
2888 something like this to help Vidalia not do GeoIP lookups on bridge
2890 - Allow multiple HashedControlPassword config lines, to support
2891 multiple controller passwords.
2892 - Authorities now decide whether they're authoritative for a given
2893 router based on the router's purpose.
2894 - New config options AuthDirBadDir and AuthDirListBadDirs for
2895 authorities to mark certain relays as "bad directories" in the
2896 networkstatus documents. Also supports the "!baddir" directive in
2897 the approved-routers file.
2900 Changes in version 0.2.0.12-alpha - 2007-11-16
2901 This twelfth development snapshot fixes some more build problems as
2902 well as a few minor bugs.
2905 - Make it build on OpenBSD again. Patch from tup.
2906 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
2907 package-building for Red Hat, OS X, etc.
2909 o Minor bugfixes (on 0.1.2.x):
2910 - Changing the ExitPolicyRejectPrivate setting should cause us to
2911 rebuild our server descriptor.
2913 o Minor bugfixes (on 0.2.0.x):
2914 - When we're lacking a consensus, don't try to perform rendezvous
2915 operations. Reported by Karsten Loesing.
2916 - Fix a small memory leak whenever we decide against using a
2917 newly picked entry guard. Reported by Mike Perry.
2918 - When authorities detected more than two relays running on the same
2919 IP address, they were clearing all the status flags but forgetting
2920 to clear the "hsdir" flag. So clients were being told that a
2921 given relay was the right choice for a v2 hsdir lookup, yet they
2922 never had its descriptor because it was marked as 'not running'
2924 - If we're trying to fetch a bridge descriptor and there's no way
2925 the bridge authority could help us (for example, we don't know
2926 a digest, or there is no bridge authority), don't be so eager to
2927 fall back to asking the bridge authority.
2928 - If we're using bridges or have strictentrynodes set, and our
2929 chosen exit is in the same family as all our bridges/entry guards,
2930 then be flexible about families.
2933 - When we negotiate a v2 link-layer connection (not yet implemented),
2934 accept RELAY_EARLY cells and turn them into RELAY cells if we've
2935 negotiated a v1 connection for their next step. Initial code for
2939 Changes in version 0.2.0.11-alpha - 2007-11-12
2940 This eleventh development snapshot fixes some build problems with
2941 the previous snapshot. It also includes a more secure-by-default exit
2942 policy for relays, fixes an enormous memory leak for exit relays, and
2943 fixes another bug where servers were falling out of the directory list.
2946 - Exit policies now reject connections that are addressed to a
2947 relay's public (external) IP address too, unless
2948 ExitPolicyRejectPrivate is turned off. We do this because too
2949 many relays are running nearby to services that trust them based
2950 on network address. Bugfix on 0.1.2.x.
2953 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2954 on every successful resolve. Reported by Mike Perry; bugfix
2956 - On authorities, never downgrade to old router descriptors simply
2957 because they're listed in the consensus. This created a catch-22
2958 where we wouldn't list a new descriptor because there was an
2959 old one in the consensus, and we couldn't get the new one in the
2960 consensus because we wouldn't list it. Possible fix for bug 548.
2961 Also, this might cause bug 543 to appear on authorities; if so,
2962 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
2964 o Packaging fixes on 0.2.0.10-alpha:
2965 - We were including instructions about what to do with the
2966 src/config/fallback-consensus file, but we weren't actually
2967 including it in the tarball. Disable all of that for now.
2970 - Allow people to say PreferTunnelledDirConns rather than
2971 PreferTunneledDirConns, for those alternate-spellers out there.
2974 - Don't reevaluate all the information from our consensus document
2975 just because we've downloaded a v2 networkstatus that we intend
2976 to cache. Fixes bug 545; bugfix on 0.2.0.x.
2979 Changes in version 0.2.0.10-alpha - 2007-11-10
2980 This tenth development snapshot adds a third v3 directory authority
2981 run by Mike Perry, adds most of Karsten Loesing's new hidden service
2982 descriptor format, fixes a bad crash bug and new bridge bugs introduced
2983 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
2984 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
2985 addresses many more minor issues.
2987 o New directory authorities:
2988 - Set up ides (run by Mike Perry) as the third v3 directory authority.
2991 - Allow tunnelled directory connections to ask for an encrypted
2992 "begin_dir" connection or an anonymized "uses a full Tor circuit"
2993 connection independently. Now we can make anonymized begin_dir
2994 connections for (e.g.) more secure hidden service posting and
2996 - More progress on proposal 114: code from Karsten Loesing to
2997 implement new hidden service descriptor format.
2998 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
2999 accommodate the growing number of servers that use the default
3000 and are reaching it.
3001 - Directory authorities use a new formula for selecting which nodes
3002 to advertise as Guards: they must be in the top 7/8 in terms of
3003 how long we have known about them, and above the median of those
3004 nodes in terms of weighted fractional uptime.
3005 - Make "not enough dir info yet" warnings describe *why* Tor feels
3006 it doesn't have enough directory info yet.
3009 - Stop servers from crashing if they set a Family option (or
3010 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
3012 - Make bridge users work again -- the move to v3 directories in
3013 0.2.0.9-alpha had introduced a number of bugs that made bridges
3014 no longer work for clients.
3015 - When the clock jumps forward a lot, do not allow the bandwidth
3016 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
3018 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
3019 - When the consensus lists a router descriptor that we previously were
3020 mirroring, but that we considered non-canonical, reload the
3021 descriptor as canonical. This fixes bug 543 where Tor servers
3022 would start complaining after a few days that they don't have
3023 enough directory information to build a circuit.
3024 - Consider replacing the current consensus when certificates arrive
3025 that make the pending consensus valid. Previously, we were only
3026 considering replacement when the new certs _didn't_ help.
3027 - Fix an assert error on startup if we didn't already have the
3028 consensus and certs cached in our datadirectory: we were caching
3029 the consensus in consensus_waiting_for_certs but then free'ing it
3031 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
3032 Request) if we need more v3 certs but we've already got pending
3033 requests for all of them.
3034 - Correctly back off from failing certificate downloads. Fixes
3036 - Authorities don't vote on the Running flag if they have been running
3037 for less than 30 minutes themselves. Fixes bug 547, where a newly
3038 started authority would vote that everyone was down.
3041 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
3042 it, it had no AES, and it hasn't seen any security patches since
3046 - Clients now hold circuitless TLS connections open for 1.5 times
3047 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
3048 rebuild a new circuit over them within that timeframe. Previously,
3049 they held them open only for KeepalivePeriod (5 minutes).
3050 - Use "If-Modified-Since" to avoid retrieving consensus
3051 networkstatuses that we already have.
3052 - When we have no consensus, check FallbackNetworkstatusFile (defaults
3053 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
3054 we start knowing some directory caches.
3055 - When we receive a consensus from the future, warn about skew.
3056 - Improve skew reporting: try to give the user a better log message
3057 about how skewed they are, and how much this matters.
3058 - When we have a certificate for an authority, believe that
3059 certificate's claims about the authority's IP address.
3060 - New --quiet command-line option to suppress the default console log.
3061 Good in combination with --hash-password.
3062 - Authorities send back an X-Descriptor-Not-New header in response to
3063 an accepted-but-discarded descriptor upload. Partially implements
3065 - Make the log message for "tls error. breaking." more useful.
3066 - Better log messages about certificate downloads, to attempt to
3067 track down the second incarnation of bug 546.
3069 o Minor features (bridges):
3070 - If bridge users set UpdateBridgesFromAuthority, but the digest
3071 they ask for is a 404 from the bridge authority, they now fall
3072 back to trying the bridge directly.
3073 - Bridges now use begin_dir to publish their server descriptor to
3074 the bridge authority, even when they haven't set TunnelDirConns.
3076 o Minor features (controller):
3077 - When reporting clock skew, and we know that the clock is _at least
3078 as skewed_ as some value, but we don't know the actual value,
3079 report the value as a "minimum skew."
3082 - Update linux-tor-prio.sh script to allow QoS based on the uid of
3083 the Tor process. Patch from Marco Bonetti with tweaks from Mike
3087 - Refuse to start if both ORPort and UseBridges are set. Bugfix
3088 on 0.2.0.x, suggested by Matt Edman.
3089 - Don't stop fetching descriptors when FetchUselessDescriptors is
3090 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
3091 reported by tup and ioerror.
3092 - Better log message on vote from unknown authority.
3093 - Don't log "Launching 0 request for 0 router" message.
3095 o Minor bugfixes (memory leaks):
3096 - Stop leaking memory every time we parse a v3 certificate. Bugfix
3098 - Stop leaking memory every time we load a v3 certificate. Bugfix
3099 on 0.2.0.1-alpha. Fixes bug 536.
3100 - Stop leaking a cached networkstatus on exit. Bugfix on
3102 - Stop leaking voter information every time we free a consensus.
3103 Bugfix on 0.2.0.3-alpha.
3104 - Stop leaking signed data every time we check a voter signature.
3105 Bugfix on 0.2.0.3-alpha.
3106 - Stop leaking a signature every time we fail to parse a consensus or
3107 a vote. Bugfix on 0.2.0.3-alpha.
3108 - Stop leaking v2_download_status_map on shutdown. Bugfix on
3110 - Stop leaking conn->nickname every time we make a connection to a
3111 Tor relay without knowing its expected identity digest (e.g. when
3112 using bridges). Bugfix on 0.2.0.3-alpha.
3114 - Minor bugfixes (portability):
3115 - Run correctly on platforms where rlim_t is larger than unsigned
3116 long, and/or where the real limit for number of open files is
3117 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
3118 particular, these may be needed for OS X 10.5.
3121 Changes in version 0.1.2.18 - 2007-10-28
3122 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
3123 hidden service introduction that were causing huge delays, and a big
3124 bug that was causing some servers to disappear from the network status
3125 lists for a few hours each day.
3127 o Major bugfixes (crashes):
3128 - If a connection is shut down abruptly because of something that
3129 happened inside connection_flushed_some(), do not call
3130 connection_finished_flushing(). Should fix bug 451:
3131 "connection_stop_writing: Assertion conn->write_event failed"
3132 Bugfix on 0.1.2.7-alpha.
3133 - Fix possible segfaults in functions called from
3134 rend_process_relay_cell().
3136 o Major bugfixes (hidden services):
3137 - Hidden services were choosing introduction points uniquely by
3138 hexdigest, but when constructing the hidden service descriptor
3139 they merely wrote the (potentially ambiguous) nickname.
3140 - Clients now use the v2 intro format for hidden service
3141 connections: they specify their chosen rendezvous point by identity
3142 digest rather than by (potentially ambiguous) nickname. These
3143 changes could speed up hidden service connections dramatically.
3145 o Major bugfixes (other):
3146 - Stop publishing a new server descriptor just because we get a
3147 HUP signal. This led (in a roundabout way) to some servers getting
3148 dropped from the networkstatus lists for a few hours each day.
3149 - When looking for a circuit to cannibalize, consider family as well
3150 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
3151 circuit cannibalization).
3152 - When a router wasn't listed in a new networkstatus, we were leaving
3153 the flags for that router alone -- meaning it remained Named,
3154 Running, etc -- even though absence from the networkstatus means
3155 that it shouldn't be considered to exist at all anymore. Now we
3156 clear all the flags for routers that fall out of the networkstatus
3157 consensus. Fixes bug 529.
3160 - Don't try to access (or alter) the state file when running
3161 --list-fingerprint or --verify-config or --hash-password. Resolves
3163 - When generating information telling us how to extend to a given
3164 router, do not try to include the nickname if it is
3165 absent. Resolves bug 467.
3166 - Fix a user-triggerable segfault in expand_filename(). (There isn't
3167 a way to trigger this remotely.)
3168 - When sending a status event to the controller telling it that an
3169 OR address is reachable, set the port correctly. (Previously we
3170 were reporting the dir port.)
3171 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
3172 command. Bugfix on 0.1.2.17.
3173 - When loading bandwidth history, do not believe any information in
3174 the future. Fixes bug 434.
3175 - When loading entry guard information, do not believe any information
3177 - When we have our clock set far in the future and generate an
3178 onion key, then re-set our clock to be correct, we should not stop
3179 the onion key from getting rotated.
3180 - On some platforms, accept() can return a broken address. Detect
3181 this more quietly, and deal accordingly. Fixes bug 483.
3182 - It's not actually an error to find a non-pending entry in the DNS
3183 cache when canceling a pending resolve. Don't log unless stuff
3184 is fishy. Resolves bug 463.
3185 - Don't reset trusted dir server list when we set a configuration
3186 option. Patch from Robert Hogan.
3187 - Don't try to create the datadir when running --verify-config or
3188 --hash-password. Resolves bug 540.
3191 Changes in version 0.2.0.9-alpha - 2007-10-24
3192 This ninth development snapshot switches clients to the new v3 directory
3193 system; allows servers to be listed in the network status even when they
3194 have the same nickname as a registered server; and fixes many other
3195 bugs including a big one that was causing some servers to disappear
3196 from the network status lists for a few hours each day.
3198 o Major features (directory system):
3199 - Clients now download v3 consensus networkstatus documents instead
3200 of v2 networkstatus documents. Clients and caches now base their
3201 opinions about routers on these consensus documents. Clients only
3202 download router descriptors listed in the consensus.
3203 - Authorities now list servers who have the same nickname as
3204 a different named server, but list them with a new flag,
3205 "Unnamed". Now we can list servers that happen to pick the same
3206 nickname as a server that registered two years ago and then
3207 disappeared. Partially implements proposal 122.
3208 - If the consensus lists a router as "Unnamed", the name is assigned
3209 to a different router: do not identify the router by that name.
3210 Partially implements proposal 122.
3211 - Authorities can now come to a consensus on which method to use to
3212 compute the consensus. This gives us forward compatibility.
3215 - Stop publishing a new server descriptor just because we HUP or
3216 when we find our DirPort to be reachable but won't actually publish
3217 it. New descriptors without any real changes are dropped by the
3218 authorities, and can screw up our "publish every 18 hours" schedule.
3220 - When a router wasn't listed in a new networkstatus, we were leaving
3221 the flags for that router alone -- meaning it remained Named,
3222 Running, etc -- even though absence from the networkstatus means
3223 that it shouldn't be considered to exist at all anymore. Now we
3224 clear all the flags for routers that fall out of the networkstatus
3225 consensus. Fixes bug 529; bugfix on 0.1.2.x.
3226 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
3227 extrainfo documents and then discard them immediately for not
3228 matching the latest router. Bugfix on 0.2.0.1-alpha.
3230 o Minor features (v3 directory protocol):
3231 - Allow tor-gencert to generate a new certificate without replacing
3233 - Allow certificates to include an address.
3234 - When we change our directory-cache settings, reschedule all voting
3235 and download operations.
3236 - Reattempt certificate downloads immediately on failure, as long as
3237 we haven't failed a threshold number of times yet.
3238 - Delay retrying consensus downloads while we're downloading
3239 certificates to verify the one we just got. Also, count getting a
3240 consensus that we already have (or one that isn't valid) as a failure,
3241 and count failing to get the certificates after 20 minutes as a
3243 - Build circuits and download descriptors even if our consensus is a
3244 little expired. (This feature will go away once authorities are
3247 o Minor features (router descriptor cache):
3248 - If we find a cached-routers file that's been sitting around for more
3249 than 28 days unmodified, then most likely it's a leftover from
3250 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
3252 - When we (as a cache) download a descriptor because it was listed
3253 in a consensus, remember when the consensus was supposed to expire,
3254 and don't expire the descriptor until then.
3256 o Minor features (performance):
3257 - Call routerlist_remove_old_routers() much less often. This should
3258 speed startup, especially on directory caches.
3259 - Don't try to launch new descriptor downloads quite so often when we
3260 already have enough directory information to build circuits.
3261 - Base64 decoding was actually showing up on our profile when parsing
3262 the initial descriptor file; switch to an in-process all-at-once
3263 implementation that's about 3.5x times faster than calling out to
3266 o Minor features (compilation):
3267 - Detect non-ASCII platforms (if any still exist) and refuse to
3268 build there: some of our code assumes that 'A' is 65 and so on.
3270 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
3271 - Make the "next period" votes into "current period" votes immediately
3272 after publishing the consensus; avoid a heisenbug that made them
3273 stick around indefinitely.
3274 - When we discard a vote as a duplicate, do not report this as
3276 - Treat missing v3 keys or certificates as an error when running as a
3277 v3 directory authority.
3278 - When we're configured to be a v3 authority, but we're only listed
3279 as a non-v3 authority in our DirServer line for ourself, correct
3281 - If an authority doesn't have a qualified hostname, just put
3282 its address in the vote. This fixes the problem where we referred to
3283 "moria on moria:9031."
3284 - Distinguish between detached signatures for the wrong period, and
3285 detached signatures for a divergent vote.
3286 - Fix a small memory leak when computing a consensus.
3287 - When there's no concensus, we were forming a vote every 30
3288 minutes, but writing the "valid-after" line in our vote based
3289 on our configured V3AuthVotingInterval: so unless the intervals
3290 matched up, we immediately rejected our own vote because it didn't
3291 start at the voting interval that caused us to construct a vote.
3293 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
3294 - Delete unverified-consensus when the real consensus is set.
3295 - Consider retrying a consensus networkstatus fetch immediately
3296 after one fails: don't wait 60 seconds to notice.
3297 - When fetching a consensus as a cache, wait until a newer consensus
3298 should exist before trying to replace the current one.
3299 - Use a more forgiving schedule for retrying failed consensus
3300 downloads than for other types.
3302 o Minor bugfixes (other directory issues):
3303 - Correct the implementation of "download votes by digest." Bugfix on
3305 - Authorities no longer send back "400 you're unreachable please fix
3306 it" errors to Tor servers that aren't online all the time. We're
3307 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
3309 o Minor bugfixes (controller):
3310 - Don't reset trusted dir server list when we set a configuration
3311 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
3312 - Respond to INT and TERM SIGNAL commands before we execute the
3313 signal, in case the signal shuts us down. We had a patch in
3314 0.1.2.1-alpha that tried to do this by queueing the response on
3315 the connection's buffer before shutting down, but that really
3316 isn't the same thing at all. Bug located by Matt Edman.
3318 o Minor bugfixes (misc):
3319 - Correctly check for bad options to the "PublishServerDescriptor"
3320 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
3321 - Stop leaking memory on failing case of base32_decode, and make
3322 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
3323 - Don't try to download extrainfo documents when we're trying to
3324 fetch enough directory info to build a circuit: having enough
3325 info should get priority. Bugfix on 0.2.0.x.
3326 - Don't complain that "your server has not managed to confirm that its
3327 ports are reachable" if we haven't been able to build any circuits
3328 yet. Bug found by spending four hours without a v3 consensus. Bugfix
3330 - Detect the reason for failing to mmap a descriptor file we just
3331 wrote, and give a more useful log message. Fixes bug 533. Bugfix
3334 o Code simplifications and refactoring:
3335 - Remove support for the old bw_accounting file: we've been storing
3336 bandwidth accounting information in the state file since
3337 0.1.2.5-alpha. This may result in bandwidth accounting errors
3338 if you try to upgrade from 0.1.1.x or earlier, or if you try to
3339 downgrade to 0.1.1.x or earlier.
3340 - New convenience code to locate a file within the DataDirectory.
3341 - Move non-authority functionality out of dirvote.c.
3342 - Refactor the arguments for router_pick_{directory_|trusteddir}server
3343 so that they all take the same named flags.
3346 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
3347 Unix users an easy way to script their Tor process (e.g. by
3348 adjusting bandwidth based on the time of the day).
3351 Changes in version 0.2.0.8-alpha - 2007-10-12
3352 This eighth development snapshot fixes a crash bug that's been bothering
3353 us since February 2007, lets bridge authorities store a list of bridge
3354 descriptors they've seen, gets v3 directory voting closer to working,
3355 starts caching v3 directory consensus documents on directory mirrors,
3356 and fixes a variety of smaller issues including some minor memory leaks.
3358 o Major features (router descriptor cache):
3359 - Store routers in a file called cached-descriptors instead of in
3360 cached-routers. Initialize cached-descriptors from cached-routers
3361 if the old format is around. The new format allows us to store
3362 annotations along with descriptors.
3363 - Use annotations to record the time we received each descriptor, its
3364 source, and its purpose.
3365 - Disable the SETROUTERPURPOSE controller command: it is now
3367 - Controllers should now specify cache=no or cache=yes when using
3368 the +POSTDESCRIPTOR command.
3369 - Bridge authorities now write bridge descriptors to disk, meaning
3370 we can export them to other programs and begin distributing them
3373 o Major features (directory authorities):
3374 - When a v3 authority is missing votes or signatures, it now tries
3376 - Directory authorities track weighted fractional uptime as well as
3377 weighted mean-time-between failures. WFU is suitable for deciding
3378 whether a node is "usually up", while MTBF is suitable for deciding
3379 whether a node is "likely to stay up." We need both, because
3380 "usually up" is a good requirement for guards, while "likely to
3381 stay up" is a good requirement for long-lived connections.
3383 o Major features (v3 directory system):
3384 - Caches now download v3 network status documents as needed,
3385 and download the descriptors listed in them.
3386 - All hosts now attempt to download and keep fresh v3 authority
3387 certificates, and re-attempt after failures.
3388 - More internal-consistency checks for vote parsing.
3390 o Major bugfixes (crashes):
3391 - If a connection is shut down abruptly because of something that
3392 happened inside connection_flushed_some(), do not call
3393 connection_finished_flushing(). Should fix bug 451. Bugfix on
3396 o Major bugfixes (performance):
3397 - Fix really bad O(n^2) performance when parsing a long list of
3398 routers: Instead of searching the entire list for an "extra-info "
3399 string which usually wasn't there, once for every routerinfo
3400 we read, just scan lines forward until we find one we like.
3402 - When we add data to a write buffer in response to the data on that
3403 write buffer getting low because of a flush, do not consider the
3404 newly added data as a candidate for immediate flushing, but rather
3405 make it wait until the next round of writing. Otherwise, we flush
3406 and refill recursively, and a single greedy TLS connection can
3407 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
3409 o Minor features (v3 authority system):
3410 - Add more ways for tools to download the votes that lead to the
3412 - Send a 503 when low on bandwidth and a vote, consensus, or
3413 certificate is requested.
3414 - If-modified-since is now implemented properly for all kinds of
3415 certificate requests.
3417 o Minor bugfixes (network statuses):
3418 - Tweak the implementation of proposal 109 slightly: allow at most
3419 two Tor servers on the same IP address, except if it's the location
3420 of a directory authority, in which case allow five. Bugfix on
3423 o Minor bugfixes (controller):
3424 - When sending a status event to the controller telling it that an
3425 OR address is reachable, set the port correctly. (Previously we
3426 were reporting the dir port.) Bugfix on 0.1.2.x.
3428 o Minor bugfixes (v3 directory system):
3429 - Fix logic to look up a cert by its signing key digest. Bugfix on
3431 - Only change the reply to a vote to "OK" if it's not already
3432 set. This gets rid of annoying "400 OK" log messages, which may
3433 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
3434 - When we get a valid consensus, recompute the voting schedule.
3435 - Base the valid-after time of a vote on the consensus voting
3436 schedule, not on our preferred schedule.
3437 - Make the return values and messages from signature uploads and
3438 downloads more sensible.
3439 - Fix a memory leak when serving votes and consensus documents, and
3440 another when serving certificates.
3442 o Minor bugfixes (performance):
3443 - Use a slightly simpler string hashing algorithm (copying Python's
3444 instead of Java's) and optimize our digest hashing algorithm to take
3445 advantage of 64-bit platforms and to remove some possibly-costly
3447 - Fix a minor memory leak whenever we parse guards from our state
3448 file. Bugfix on 0.2.0.7-alpha.
3449 - Fix a minor memory leak whenever we write out a file. Bugfix on
3451 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
3452 command. Bugfix on 0.2.0.5-alpha.
3454 o Minor bugfixes (portability):
3455 - On some platforms, accept() can return a broken address. Detect
3456 this more quietly, and deal accordingly. Fixes bug 483.
3457 - Stop calling tor_strlower() on uninitialized memory in some cases.
3458 Bugfix in 0.2.0.7-alpha.
3460 o Minor bugfixes (usability):
3461 - Treat some 403 responses from directory servers as INFO rather than
3462 WARN-severity events.
3463 - It's not actually an error to find a non-pending entry in the DNS
3464 cache when canceling a pending resolve. Don't log unless stuff is
3465 fishy. Resolves bug 463.
3467 o Minor bugfixes (anonymity):
3468 - Never report that we've used more bandwidth than we're willing to
3469 relay: it leaks how much non-relay traffic we're using. Resolves
3471 - When looking for a circuit to cannibalize, consider family as well
3472 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
3473 circuit cannibalization).
3475 o Code simplifications and refactoring:
3476 - Make a bunch of functions static. Remove some dead code.
3477 - Pull out about a third of the really big routerlist.c; put it in a
3478 new module, networkstatus.c.
3479 - Merge the extra fields in local_routerstatus_t back into
3480 routerstatus_t: we used to need one routerstatus_t for each
3481 authority's opinion, plus a local_routerstatus_t for the locally
3482 computed consensus opinion. To save space, we put the locally
3483 modified fields into local_routerstatus_t, and only the common
3484 stuff into routerstatus_t. But once v3 directories are in use,
3485 clients and caches will no longer need to hold authority opinions;
3486 thus, the rationale for keeping the types separate is now gone.
3487 - Make the code used to reschedule and reattempt downloads more
3489 - Turn all 'Are we a directory server/mirror?' logic into a call to
3491 - Remove the code to generate the oldest (v1) directory format.
3492 The code has been disabled since 0.2.0.5-alpha.
3495 Changes in version 0.2.0.7-alpha - 2007-09-21
3496 This seventh development snapshot makes bridges work again, makes bridge
3497 authorities work for the first time, fixes two huge performance flaws
3498 in hidden services, and fixes a variety of minor issues.
3500 o New directory authorities:
3501 - Set up moria1 and tor26 as the first v3 directory authorities. See
3502 doc/spec/dir-spec.txt for details on the new directory design.
3504 o Major bugfixes (crashes):
3505 - Fix possible segfaults in functions called from
3506 rend_process_relay_cell(). Bugfix on 0.1.2.x.
3508 o Major bugfixes (bridges):
3509 - Fix a bug that made servers send a "404 Not found" in response to
3510 attempts to fetch their server descriptor. This caused Tor servers
3511 to take many minutes to establish reachability for their DirPort,
3512 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
3513 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
3514 users configure that and specify a bridge with an identity
3515 fingerprint, now they will lookup the bridge descriptor at the
3516 default bridge authority via a one-hop tunnel, but once circuits
3517 are established they will switch to a three-hop tunnel for later
3518 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
3520 o Major bugfixes (hidden services):
3521 - Hidden services were choosing introduction points uniquely by
3522 hexdigest, but when constructing the hidden service descriptor
3523 they merely wrote the (potentially ambiguous) nickname.
3524 - Clients now use the v2 intro format for hidden service
3525 connections: they specify their chosen rendezvous point by identity
3526 digest rather than by (potentially ambiguous) nickname. Both
3527 are bugfixes on 0.1.2.x, and they could speed up hidden service
3528 connections dramatically. Thanks to Karsten Loesing.
3530 o Minor features (security):
3531 - As a client, do not believe any server that tells us that an
3532 address maps to an internal address space.
3533 - Make it possible to enable HashedControlPassword and
3534 CookieAuthentication at the same time.
3536 o Minor features (guard nodes):
3537 - Tag every guard node in our state file with the version that
3538 we believe added it, or with our own version if we add it. This way,
3539 if a user temporarily runs an old version of Tor and then switches
3540 back to a new one, she doesn't automatically lose her guards.
3542 o Minor features (speed):
3543 - When implementing AES counter mode, update only the portions of the
3544 counter buffer that need to change, and don't keep separate
3545 network-order and host-order counters when they are the same (i.e.,
3546 on big-endian hosts.)
3548 o Minor features (controller):
3549 - Accept LF instead of CRLF on controller, since some software has a
3550 hard time generating real Internet newlines.
3551 - Add GETINFO values for the server status events
3552 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
3556 - Routers no longer include bandwidth-history lines in their
3557 descriptors; this information is already available in extra-info
3558 documents, and including it in router descriptors took up 60%
3559 (!) of compressed router descriptor downloads. Completes
3560 implementation of proposal 104.
3561 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
3562 and TorControl.py, as they use the old v0 controller protocol,
3563 and are obsoleted by TorFlow anyway.
3564 - Drop support for v1 rendezvous descriptors, since we never used
3565 them anyway, and the code has probably rotted by now. Based on
3566 patch from Karsten Loesing.
3567 - On OSX, stop warning the user that kqueue support in libevent is
3568 "experimental", since it seems to have worked fine for ages.
3571 - When generating information telling us how to extend to a given
3572 router, do not try to include the nickname if it is absent. Fixes
3573 bug 467. Bugfix on 0.2.0.3-alpha.
3574 - Fix a user-triggerable (but not remotely-triggerable) segfault
3575 in expand_filename(). Bugfix on 0.1.2.x.
3576 - Fix a memory leak when freeing incomplete requests from DNSPort.
3577 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
3578 - Don't try to access (or alter) the state file when running
3579 --list-fingerprint or --verify-config or --hash-password. (Resolves
3580 bug 499.) Bugfix on 0.1.2.x.
3581 - Servers used to decline to publish their DirPort if their
3582 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
3583 were below a threshold. Now they only look at BandwidthRate and
3584 RelayBandwidthRate. Bugfix on 0.1.2.x.
3585 - Remove an optimization in the AES counter-mode code that assumed
3586 that the counter never exceeded 2^68. When the counter can be set
3587 arbitrarily as an IV (as it is by Karsten's new hidden services
3588 code), this assumption no longer holds. Bugfix on 0.1.2.x.
3589 - Resume listing "AUTHORITY" flag for authorities in network status.
3590 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
3592 o Code simplifications and refactoring:
3593 - Revamp file-writing logic so we don't need to have the entire
3594 contents of a file in memory at once before we write to disk. Tor,
3596 - Turn "descriptor store" into a full-fledged type.
3597 - Move all NT services code into a separate source file.
3598 - Unify all code that computes medians, percentile elements, etc.
3599 - Get rid of a needless malloc when parsing address policies.
3602 Changes in version 0.1.2.17 - 2007-08-30
3603 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
3604 X bundles. Vidalia 0.0.14 makes authentication required for the
3605 ControlPort in the default configuration, which addresses important
3606 security risks. Everybody who uses Vidalia (or another controller)
3609 In addition, this Tor update fixes major load balancing problems with
3610 path selection, which should speed things up a lot once many people
3613 o Major bugfixes (security):
3614 - We removed support for the old (v0) control protocol. It has been
3615 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
3616 become more of a headache than it's worth.
3618 o Major bugfixes (load balancing):
3619 - When choosing nodes for non-guard positions, weight guards
3620 proportionally less, since they already have enough load. Patch
3622 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
3623 will allow fast Tor servers to get more attention.
3624 - When we're upgrading from an old Tor version, forget our current
3625 guards and pick new ones according to the new weightings. These
3626 three load balancing patches could raise effective network capacity
3627 by a factor of four. Thanks to Mike Perry for measurements.
3629 o Major bugfixes (stream expiration):
3630 - Expire not-yet-successful application streams in all cases if
3631 they've been around longer than SocksTimeout. Right now there are
3632 some cases where the stream will live forever, demanding a new
3633 circuit every 15 seconds. Fixes bug 454; reported by lodger.
3635 o Minor features (controller):
3636 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
3637 is valid before any authentication has been received. It tells
3638 a controller what kind of authentication is expected, and what
3639 protocol is spoken. Implements proposal 119.
3641 o Minor bugfixes (performance):
3642 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
3643 greatly speeding up loading cached-routers from disk on startup.
3644 - Disable sentinel-based debugging for buffer code: we squashed all
3645 the bugs that this was supposed to detect a long time ago, and now
3646 its only effect is to change our buffer sizes from nice powers of
3647 two (which platform mallocs tend to like) to values slightly over
3648 powers of two (which make some platform mallocs sad).
3650 o Minor bugfixes (misc):
3651 - If exit bandwidth ever exceeds one third of total bandwidth, then
3652 use the correct formula to weight exit nodes when choosing paths.
3653 Based on patch from Mike Perry.
3654 - Choose perfectly fairly among routers when choosing by bandwidth and
3655 weighting by fraction of bandwidth provided by exits. Previously, we
3656 would choose with only approximate fairness, and correct ourselves
3657 if we ran off the end of the list.
3658 - If we require CookieAuthentication but we fail to write the
3659 cookie file, we would warn but not exit, and end up in a state
3660 where no controller could authenticate. Now we exit.
3661 - If we require CookieAuthentication, stop generating a new cookie
3662 every time we change any piece of our config.
3663 - Refuse to start with certain directory authority keys, and
3664 encourage people using them to stop.
3665 - Terminate multi-line control events properly. Original patch
3667 - Fix a minor memory leak when we fail to find enough suitable
3668 servers to choose a circuit.
3669 - Stop leaking part of the descriptor when we run into a particularly
3670 unparseable piece of it.
3673 Changes in version 0.2.0.6-alpha - 2007-08-26
3674 This sixth development snapshot features a new Vidalia version in the
3675 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
3676 the ControlPort in the default configuration, which addresses important
3679 In addition, this snapshot fixes major load balancing problems
3680 with path selection, which should speed things up a lot once many
3681 people have upgraded. The directory authorities also use a new
3682 mean-time-between-failure approach to tracking which servers are stable,
3683 rather than just looking at the most recent uptime.
3685 o New directory authorities:
3686 - Set up Tonga as the default bridge directory authority.
3689 - Directory authorities now track servers by weighted
3690 mean-times-between-failures. When we have 4 or more days of data,
3691 use measured MTBF rather than declared uptime to decide whether
3692 to call a router Stable. Implements proposal 108.
3694 o Major bugfixes (load balancing):
3695 - When choosing nodes for non-guard positions, weight guards
3696 proportionally less, since they already have enough load. Patch
3698 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
3699 will allow fast Tor servers to get more attention.
3700 - When we're upgrading from an old Tor version, forget our current
3701 guards and pick new ones according to the new weightings. These
3702 three load balancing patches could raise effective network capacity
3703 by a factor of four. Thanks to Mike Perry for measurements.
3705 o Major bugfixes (descriptor parsing):
3706 - Handle unexpected whitespace better in malformed descriptors. Bug
3707 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
3710 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
3711 GETINFO for Torstat to use until it can switch to using extrainfos.
3712 - Optionally (if built with -DEXPORTMALLINFO) export the output
3713 of mallinfo via http, as tor/mallinfo.txt. Only accessible
3717 - Do not intermix bridge routers with controller-added
3718 routers. (Bugfix on 0.2.0.x)
3719 - Do not fail with an assert when accept() returns an unexpected
3720 address family. Addresses but does not wholly fix bug 483. (Bugfix
3722 - Let directory authorities startup even when they can't generate
3723 a descriptor immediately, e.g. because they don't know their
3725 - Stop putting the authentication cookie in a file called "0"
3726 in your working directory if you don't specify anything for the
3727 new CookieAuthFile option. Reported by Matt Edman.
3728 - Make it possible to read the PROTOCOLINFO response in a way that
3729 conforms to our control-spec. Reported by Matt Edman.
3730 - Fix a minor memory leak when we fail to find enough suitable
3731 servers to choose a circuit. Bugfix on 0.1.2.x.
3732 - Stop leaking part of the descriptor when we run into a particularly
3733 unparseable piece of it. Bugfix on 0.1.2.x.
3734 - Unmap the extrainfo cache file on exit.
3737 Changes in version 0.2.0.5-alpha - 2007-08-19
3738 This fifth development snapshot fixes compilation on Windows again;
3739 fixes an obnoxious client-side bug that slowed things down and put
3740 extra load on the network; gets us closer to using the v3 directory
3741 voting scheme; makes it easier for Tor controllers to use cookie-based
3742 authentication; and fixes a variety of other bugs.
3745 - Version 1 directories are no longer generated in full. Instead,
3746 authorities generate and serve "stub" v1 directories that list
3747 no servers. This will stop Tor versions 0.1.0.x and earlier from
3748 working, but (for security reasons) nobody should be running those
3751 o Major bugfixes (compilation, 0.2.0.x):
3752 - Try to fix Win32 compilation again: improve checking for IPv6 types.
3753 - Try to fix MSVC compilation: build correctly on platforms that do
3754 not define s6_addr16 or s6_addr32.
3755 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
3758 o Major bugfixes (stream expiration):
3759 - Expire not-yet-successful application streams in all cases if
3760 they've been around longer than SocksTimeout. Right now there are
3761 some cases where the stream will live forever, demanding a new
3762 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
3765 o Minor features (directory servers):
3766 - When somebody requests a list of statuses or servers, and we have
3767 none of those, return a 404 rather than an empty 200.
3769 o Minor features (directory voting):
3770 - Store v3 consensus status consensuses on disk, and reload them
3773 o Minor features (security):
3774 - Warn about unsafe ControlPort configurations.
3775 - Refuse to start with certain directory authority keys, and
3776 encourage people using them to stop.
3778 o Minor features (controller):
3779 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
3780 is valid before any authentication has been received. It tells
3781 a controller what kind of authentication is expected, and what
3782 protocol is spoken. Implements proposal 119.
3783 - New config option CookieAuthFile to choose a new location for the
3784 cookie authentication file, and config option
3785 CookieAuthFileGroupReadable to make it group-readable.
3787 o Minor features (unit testing):
3788 - Add command-line arguments to unit-test executable so that we can
3789 invoke any chosen test from the command line rather than having
3790 to run the whole test suite at once; and so that we can turn on
3791 logging for the unit tests.
3793 o Minor bugfixes (on 0.1.2.x):
3794 - If we require CookieAuthentication but we fail to write the
3795 cookie file, we would warn but not exit, and end up in a state
3796 where no controller could authenticate. Now we exit.
3797 - If we require CookieAuthentication, stop generating a new cookie
3798 every time we change any piece of our config.
3799 - When loading bandwidth history, do not believe any information in
3800 the future. Fixes bug 434.
3801 - When loading entry guard information, do not believe any information
3803 - When we have our clock set far in the future and generate an
3804 onion key, then re-set our clock to be correct, we should not stop
3805 the onion key from getting rotated.
3806 - Clean up torrc sample config file.
3807 - Do not automatically run configure from autogen.sh. This
3808 non-standard behavior tended to annoy people who have built other
3811 o Minor bugfixes (on 0.2.0.x):
3812 - Fix a bug with AutomapHostsOnResolve that would always cause
3813 the second request to fail. Bug reported by Kate. Bugfix on
3815 - Fix a bug in ADDRMAP controller replies that would sometimes
3816 try to print a NULL. Patch from tup.
3817 - Read v3 directory authority keys from the right location.
3818 - Numerous bugfixes to directory voting code.
3821 Changes in version 0.1.2.16 - 2007-08-01
3822 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
3823 remote attacker in certain situations to rewrite the user's torrc
3824 configuration file. This can completely compromise anonymity of users
3825 in most configurations, including those running the Vidalia bundles,
3826 TorK, etc. Or worse.
3828 o Major security fixes:
3829 - Close immediately after missing authentication on control port;
3830 do not allow multiple authentication attempts.
3833 Changes in version 0.2.0.4-alpha - 2007-08-01
3834 This fourth development snapshot fixes a critical security vulnerability
3835 for most users, specifically those running Vidalia, TorK, etc. Everybody
3836 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
3838 o Major security fixes:
3839 - Close immediately after missing authentication on control port;
3840 do not allow multiple authentication attempts.
3842 o Major bugfixes (compilation):
3843 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
3846 o Minor features (performance):
3847 - Be even more aggressive about releasing RAM from small
3848 empty buffers. Thanks to our free-list code, this shouldn't be too
3849 performance-intensive.
3850 - Disable sentinel-based debugging for buffer code: we squashed all
3851 the bugs that this was supposed to detect a long time ago, and
3852 now its only effect is to change our buffer sizes from nice
3853 powers of two (which platform mallocs tend to like) to values
3854 slightly over powers of two (which make some platform mallocs sad).
3855 - Log malloc statistics from mallinfo() on platforms where it
3859 Changes in version 0.2.0.3-alpha - 2007-07-29
3860 This third development snapshot introduces new experimental
3861 blocking-resistance features and a preliminary version of the v3
3862 directory voting design, and includes many other smaller features
3866 - The first pieces of our "bridge" design for blocking-resistance
3867 are implemented. People can run bridge directory authorities;
3868 people can run bridges; and people can configure their Tor clients
3869 with a set of bridges to use as the first hop into the Tor network.
3870 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
3872 - Create listener connections before we setuid to the configured
3873 User and Group. Now non-Windows users can choose port values
3874 under 1024, start Tor as root, and have Tor bind those ports
3875 before it changes to another UID. (Windows users could already
3877 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
3878 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
3879 on "vserver" accounts. (Patch from coderman.)
3880 - Be even more aggressive about separating local traffic from relayed
3881 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
3883 o Major features (experimental):
3884 - First cut of code for "v3 dir voting": directory authorities will
3885 vote on a common network status document rather than each publishing
3886 their own opinion. This code needs more testing and more corner-case
3887 handling before it's ready for use.
3890 - Directory authorities now call routers Fast if their bandwidth is
3891 at least 100KB/s, and consider their bandwidth adequate to be a
3892 Guard if it is at least 250KB/s, no matter the medians. This fix
3893 complements proposal 107. [Bugfix on 0.1.2.x]
3894 - Directory authorities now never mark more than 3 servers per IP as
3895 Valid and Running. (Implements proposal 109, by Kevin Bauer and
3897 - Minor change to organizationName and commonName generation
3898 procedures in TLS certificates during Tor handshakes, to invalidate
3899 some earlier censorware approaches. This is not a long-term
3900 solution, but applying it will give us a bit of time to look into
3901 the epidemiology of countermeasures as they spread.
3903 o Major bugfixes (directory):
3904 - Rewrite directory tokenization code to never run off the end of
3905 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
3907 o Minor features (controller):
3908 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
3909 match requests to applications. (Patch from Robert Hogan.)
3910 - Report address and port correctly on connections to DNSPort. (Patch
3912 - Add a RESOLVE command to launch hostname lookups. (Original patch
3914 - Add GETINFO status/enough-dir-info to let controllers tell whether
3915 Tor has downloaded sufficient directory information. (Patch
3917 - You can now use the ControlSocket option to tell Tor to listen for
3918 controller connections on Unix domain sockets on systems that
3919 support them. (Patch from Peter Palfrader.)
3920 - STREAM NEW events are generated for DNSPort requests and for
3921 tunneled directory connections. (Patch from Robert Hogan.)
3922 - New "GETINFO address-mappings/*" command to get address mappings
3923 with expiry information. "addr-mappings/*" is now deprecated.
3926 o Minor features (misc):
3927 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
3929 - The tor-gencert tool for v3 directory authorities now creates all
3930 files as readable to the file creator only, and write-protects
3931 the authority identity key.
3932 - When dumping memory usage, list bytes used in buffer memory
3934 - When running with dmalloc, dump more stats on hup and on exit.
3935 - Directory authorities now fail quickly and (relatively) harmlessly
3936 if they generate a network status document that is somehow
3939 o Traffic load balancing improvements:
3940 - If exit bandwidth ever exceeds one third of total bandwidth, then
3941 use the correct formula to weight exit nodes when choosing paths.
3942 (Based on patch from Mike Perry.)
3943 - Choose perfectly fairly among routers when choosing by bandwidth and
3944 weighting by fraction of bandwidth provided by exits. Previously, we
3945 would choose with only approximate fairness, and correct ourselves
3946 if we ran off the end of the list. [Bugfix on 0.1.2.x]
3948 o Performance improvements:
3949 - Be more aggressive with freeing buffer RAM or putting it on the
3951 - Use Critical Sections rather than Mutexes for synchronizing threads
3952 on win32; Mutexes are heavier-weight, and designed for synchronizing
3955 o Deprecated and removed features:
3956 - RedirectExits is now deprecated.
3957 - Stop allowing address masks that do not correspond to bit prefixes.
3958 We have warned about these for a really long time; now it's time
3959 to reject them. (Patch from croup.)
3961 o Minor bugfixes (directory):
3962 - Fix another crash bug related to extra-info caching. (Bug found by
3963 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
3964 - Directories no longer return a "304 not modified" when they don't
3965 have the networkstatus the client asked for. Also fix a memory
3966 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
3967 - We had accidentally labelled 0.1.2.x directory servers as not
3968 suitable for begin_dir requests, and had labelled no directory
3969 servers as suitable for uploading extra-info documents. [Bugfix
3972 o Minor bugfixes (dns):
3973 - Fix a crash when DNSPort is set more than once. (Patch from Robert
3974 Hogan.) [Bugfix on 0.2.0.2-alpha]
3975 - Add DNSPort connections to the global connection list, so that we
3976 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
3978 - Fix a dangling reference that could lead to a crash when DNSPort is
3979 changed or closed (Patch from Robert Hogan.) [Bugfix on
3982 o Minor bugfixes (controller):
3983 - Provide DNS expiry times in GMT, not in local time. For backward
3984 compatibility, ADDRMAP events only provide GMT expiry in an extended
3985 field. "GETINFO address-mappings" always does the right thing.
3986 - Use CRLF line endings properly in NS events.
3987 - Terminate multi-line control events properly. (Original patch
3988 from tup.) [Bugfix on 0.1.2.x-alpha]
3989 - Do not include spaces in SOURCE_ADDR fields in STREAM
3990 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
3993 Changes in version 0.1.2.15 - 2007-07-17
3994 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
3995 problems, fixes compilation on BSD, and fixes a variety of other
3996 bugs. Everybody should upgrade.
3998 o Major bugfixes (compilation):
3999 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
4001 o Major bugfixes (crashes):
4002 - Try even harder not to dereference the first character after
4003 an mmap(). Reported by lodger.
4004 - Fix a crash bug in directory authorities when we re-number the
4005 routerlist while inserting a new router.
4006 - When the cached-routers file is an even multiple of the page size,
4007 don't run off the end and crash. (Fixes bug 455; based on idea
4009 - Fix eventdns.c behavior on Solaris: It is critical to include
4010 orconfig.h _before_ sys/types.h, so that we can get the expected
4011 definition of _FILE_OFFSET_BITS.
4013 o Major bugfixes (security):
4014 - Fix a possible buffer overrun when using BSD natd support. Bug
4016 - When sending destroy cells from a circuit's origin, don't include
4017 the reason for tearing down the circuit. The spec says we didn't,
4018 and now we actually don't. Reported by lodger.
4019 - Keep streamids from different exits on a circuit separate. This
4020 bug may have allowed other routers on a given circuit to inject
4021 cells into streams. Reported by lodger; fixes bug 446.
4022 - If there's a never-before-connected-to guard node in our list,
4023 never choose any guards past it. This way we don't expand our
4024 guard list unless we need to.
4026 o Minor bugfixes (guard nodes):
4027 - Weight guard selection by bandwidth, so that low-bandwidth nodes
4028 don't get overused as guards.
4030 o Minor bugfixes (directory):
4031 - Correctly count the number of authorities that recommend each
4032 version. Previously, we were under-counting by 1.
4033 - Fix a potential crash bug when we load many server descriptors at
4034 once and some of them make others of them obsolete. Fixes bug 458.
4036 o Minor bugfixes (hidden services):
4037 - Stop tearing down the whole circuit when the user asks for a
4038 connection to a port that the hidden service didn't configure.
4041 o Minor bugfixes (misc):
4042 - On Windows, we were preventing other processes from reading
4043 cached-routers while Tor was running. Reported by janbar.
4044 - Fix a possible (but very unlikely) bug in picking routers by
4045 bandwidth. Add a log message to confirm that it is in fact
4046 unlikely. Patch from lodger.
4047 - Backport a couple of memory leak fixes.
4048 - Backport miscellaneous cosmetic bugfixes.
4051 Changes in version 0.2.0.2-alpha - 2007-06-02
4052 o Major bugfixes on 0.2.0.1-alpha:
4053 - Fix an assertion failure related to servers without extra-info digests.
4054 Resolves bugs 441 and 442.
4056 o Minor features (directory):
4057 - Support "If-Modified-Since" when answering HTTP requests for
4058 directories, running-routers documents, and network-status documents.
4059 (There's no need to support it for router descriptors, since those
4060 are downloaded by descriptor digest.)
4062 o Minor build issues:
4063 - Clear up some MIPSPro compiler warnings.
4064 - When building from a tarball on a machine that happens to have SVK
4065 installed, report the micro-revision as whatever version existed
4066 in the tarball, not as "x".
4069 Changes in version 0.2.0.1-alpha - 2007-06-01
4070 This early development snapshot provides new features for people running
4071 Tor as both a client and a server (check out the new RelayBandwidth
4072 config options); lets Tor run as a DNS proxy; and generally moves us
4073 forward on a lot of fronts.
4075 o Major features, server usability:
4076 - New config options RelayBandwidthRate and RelayBandwidthBurst:
4077 a separate set of token buckets for relayed traffic. Right now
4078 relayed traffic is defined as answers to directory requests, and
4079 OR connections that don't have any local circuits on them.
4081 o Major features, client usability:
4082 - A client-side DNS proxy feature to replace the need for
4083 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
4084 for DNS requests on port 9999, use the Tor network to resolve them
4085 anonymously, and send the reply back like a regular DNS server.
4086 The code still only implements a subset of DNS.
4087 - Make PreferTunneledDirConns and TunnelDirConns work even when
4088 we have no cached directory info. This means Tor clients can now
4089 do all of their connections protected by TLS.
4091 o Major features, performance and efficiency:
4092 - Directory authorities accept and serve "extra info" documents for
4093 routers. These documents contain fields from router descriptors
4094 that aren't usually needed, and that use a lot of excess
4095 bandwidth. Once these fields are removed from router descriptors,
4096 the bandwidth savings should be about 60%. [Partially implements
4098 - Servers upload extra-info documents to any authority that accepts
4099 them. Authorities (and caches that have been configured to download
4100 extra-info documents) download them as needed. [Partially implements
4102 - Change the way that Tor buffers data that it is waiting to write.
4103 Instead of queueing data cells in an enormous ring buffer for each
4104 client->OR or OR->OR connection, we now queue cells on a separate
4105 queue for each circuit. This lets us use less slack memory, and
4106 will eventually let us be smarter about prioritizing different kinds
4108 - Use memory pools to allocate cells with better speed and memory
4109 efficiency, especially on platforms where malloc() is inefficient.
4110 - Stop reading on edge connections when their corresponding circuit
4111 buffers are full; start again as the circuits empty out.
4113 o Major features, other:
4114 - Add an HSAuthorityRecordStats option that hidden service authorities
4115 can use to track statistics of overall hidden service usage without
4116 logging information that would be very useful to an attacker.
4117 - Start work implementing multi-level keys for directory authorities:
4118 Add a standalone tool to generate key certificates. (Proposal 103.)
4121 - Directory authorities now call routers Stable if they have an
4122 uptime of at least 30 days, even if that's not the median uptime
4123 in the network. Implements proposal 107, suggested by Kevin Bauer
4126 o Minor fixes (resource management):
4127 - Count the number of open sockets separately from the number
4128 of active connection_t objects. This will let us avoid underusing
4129 our allocated connection limit.
4130 - We no longer use socket pairs to link an edge connection to an
4131 anonymous directory connection or a DirPort test connection.
4132 Instead, we track the link internally and transfer the data
4133 in-process. This saves two sockets per "linked" connection (at the
4134 client and at the server), and avoids the nasty Windows socketpair()
4136 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
4137 for every single inactive connection_t. Free items from the
4138 4k/16k-buffer free lists when they haven't been used for a while.
4140 o Minor features (build):
4141 - Make autoconf search for libevent, openssl, and zlib consistently.
4142 - Update deprecated macros in configure.in.
4143 - When warning about missing headers, tell the user to let us
4144 know if the compile succeeds anyway, so we can downgrade the
4146 - Include the current subversion revision as part of the version
4147 string: either fetch it directly if we're in an SVN checkout, do
4148 some magic to guess it if we're in an SVK checkout, or use
4149 the last-detected version if we're building from a .tar.gz.
4150 Use this version consistently in log messages.
4152 o Minor features (logging):
4153 - Always prepend "Bug: " to any log message about a bug.
4154 - Put a platform string (e.g. "Linux i686") in the startup log
4155 message, so when people paste just their logs, we know if it's
4156 OpenBSD or Windows or what.
4157 - When logging memory usage, break down memory used in buffers by
4160 o Minor features (directory system):
4161 - New config option V2AuthoritativeDirectory that all directory
4162 authorities should set. This will let future authorities choose
4163 not to serve V2 directory information.
4164 - Directory authorities allow multiple router descriptors and/or extra
4165 info documents to be uploaded in a single go. This will make
4166 implementing proposal 104 simpler.
4168 o Minor features (controller):
4169 - Add a new config option __DisablePredictedCircuits designed for
4170 use by the controller, when we don't want Tor to build any circuits
4172 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
4173 so we can exit from the middle of the circuit.
4174 - Implement "getinfo status/circuit-established".
4175 - Implement "getinfo status/version/..." so a controller can tell
4176 whether the current version is recommended, and whether any versions
4177 are good, and how many authorities agree. (Patch from shibz.)
4179 o Minor features (hidden services):
4180 - Allow multiple HiddenServicePort directives with the same virtual
4181 port; when they occur, the user is sent round-robin to one
4182 of the target ports chosen at random. Partially fixes bug 393 by
4183 adding limited ad-hoc round-robining.
4185 o Minor features (other):
4187 - Add a new AutomapHostsOnResolve option: when it is enabled, any
4188 resolve request for hosts matching a given pattern causes Tor to
4189 generate an internal virtual address mapping for that host. This
4190 allows DNSPort to work sensibly with hidden service users. By
4191 default, .exit and .onion addresses are remapped; the list of
4192 patterns can be reconfigured with AutomapHostsSuffixes.
4193 - Add an "-F" option to tor-resolve to force a resolve for a .onion
4194 address. Thanks to the AutomapHostsOnResolve option, this is no
4195 longer a completely silly thing to do.
4196 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
4197 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
4198 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
4199 minus 1 byte: the actual maximum declared bandwidth.
4202 - Removed support for the old binary "version 0" controller protocol.
4203 This has been deprecated since 0.1.1, and warnings have been issued
4204 since 0.1.2. When we encounter a v0 control message, we now send
4205 back an error and close the connection.
4206 - Remove the old "dns worker" server DNS code: it hasn't been default
4207 since 0.1.2.2-alpha, and all the servers seem to be using the new
4210 o Minor bugfixes (portability):
4211 - Even though Windows is equally happy with / and \ as path separators,
4212 try to use \ consistently on Windows and / consistently on Unix: it
4213 makes the log messages nicer.
4214 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
4215 - Read resolv.conf files correctly on platforms where read() returns
4216 partial results on small file reads.
4218 o Minor bugfixes (directory):
4219 - Correctly enforce that elements of directory objects do not appear
4220 more often than they are allowed to appear.
4221 - When we are reporting the DirServer line we just parsed, we were
4222 logging the second stanza of the key fingerprint, not the first.
4224 o Minor bugfixes (logging):
4225 - When we hit an EOF on a log (probably because we're shutting down),
4226 don't try to remove the log from the list: just mark it as
4227 unusable. (Bulletproofs against bug 222.)
4229 o Minor bugfixes (other):
4230 - In the exitlist script, only consider the most recently published
4231 server descriptor for each server. Also, when the user requests
4232 a list of servers that _reject_ connections to a given address,
4233 explicitly exclude the IPs that also have servers that accept
4234 connections to that address. (Resolves bug 405.)
4235 - Stop allowing hibernating servers to be "stable" or "fast".
4236 - On Windows, we were preventing other processes from reading
4237 cached-routers while Tor was running. (Reported by janbar)
4238 - Make the NodeFamilies config option work. (Reported by
4239 lodger -- it has never actually worked, even though we added it
4241 - Check return values from pthread_mutex functions.
4242 - Don't save non-general-purpose router descriptors to the disk cache,
4243 because we have no way of remembering what their purpose was when
4245 - Add even more asserts to hunt down bug 417.
4246 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
4247 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
4248 Add a log message to confirm that it is in fact unlikely.
4250 o Minor bugfixes (controller):
4251 - Make 'getinfo fingerprint' return a 551 error if we're not a
4252 server, so we match what the control spec claims we do. Reported
4254 - Fix a typo in an error message when extendcircuit fails that
4255 caused us to not follow the \r\n-based delimiter protocol. Reported
4258 o Code simplifications and refactoring:
4259 - Stop passing around circuit_t and crypt_path_t pointers that are
4260 implicit in other procedure arguments.
4261 - Drop the old code to choke directory connections when the
4262 corresponding OR connections got full: thanks to the cell queue
4263 feature, OR conns don't get full any more.
4264 - Make dns_resolve() handle attaching connections to circuits
4265 properly, so the caller doesn't have to.
4266 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
4267 - Keep the connection array as a dynamic smartlist_t, rather than as
4268 a fixed-sized array. This is important, as the number of connections
4269 is becoming increasingly decoupled from the number of sockets.
4272 Changes in version 0.1.2.14 - 2007-05-25
4273 Tor 0.1.2.14 changes the addresses of two directory authorities (this
4274 change especially affects those who serve or use hidden services),
4275 and fixes several other crash- and security-related bugs.
4277 o Directory authority changes:
4278 - Two directory authorities (moria1 and moria2) just moved to new
4279 IP addresses. This change will particularly affect those who serve
4280 or use hidden services.
4282 o Major bugfixes (crashes):
4283 - If a directory server runs out of space in the connection table
4284 as it's processing a begin_dir request, it will free the exit stream
4285 but leave it attached to the circuit, leading to unpredictable
4286 behavior. (Reported by seeess, fixes bug 425.)
4287 - Fix a bug in dirserv_remove_invalid() that would cause authorities
4288 to corrupt memory under some really unlikely scenarios.
4289 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
4290 - Avoid segfaults when reading from mmaped descriptor file. (Reported
4293 o Major bugfixes (security):
4294 - When choosing an entry guard for a circuit, avoid using guards
4295 that are in the same family as the chosen exit -- not just guards
4296 that are exactly the chosen exit. (Reported by lodger.)
4298 o Major bugfixes (resource management):
4299 - If a directory authority is down, skip it when deciding where to get
4300 networkstatus objects or descriptors. Otherwise we keep asking
4301 every 10 seconds forever. Fixes bug 384.
4302 - Count it as a failure if we fetch a valid network-status but we
4303 don't want to keep it. Otherwise we'll keep fetching it and keep
4304 not wanting to keep it. Fixes part of bug 422.
4305 - If all of our dirservers have given us bad or no networkstatuses
4306 lately, then stop hammering them once per minute even when we
4307 think they're failed. Fixes another part of bug 422.
4310 - Actually set the purpose correctly for descriptors inserted with
4312 - When we have k non-v2 authorities in our DirServer config,
4313 we ignored the last k authorities in the list when updating our
4315 - Correctly back-off from requesting router descriptors that we are
4316 having a hard time downloading.
4317 - Read resolv.conf files correctly on platforms where read() returns
4318 partial results on small file reads.
4319 - Don't rebuild the entire router store every time we get 32K of
4320 routers: rebuild it when the journal gets very large, or when
4321 the gaps in the store get very large.
4324 - When routers publish SVN revisions in their router descriptors,
4325 authorities now include those versions correctly in networkstatus
4327 - Warn when using a version of libevent before 1.3b to run a server on
4328 OSX or BSD: these versions interact badly with userspace threads.
4331 Changes in version 0.1.2.13 - 2007-04-24
4332 This release features some major anonymity fixes, such as safer path
4333 selection; better client performance; faster bootstrapping, better
4334 address detection, and better DNS support for servers; write limiting as
4335 well as read limiting to make servers easier to run; and a huge pile of
4336 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
4338 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
4339 of the Freenode IRC network, remembering his patience and vision for
4340 free speech on the Internet.
4343 - Fix a memory leak when we ask for "all" networkstatuses and we
4344 get one we don't recognize.
4345 - Add more asserts to hunt down bug 417.
4346 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
4349 Changes in version 0.1.2.12-rc - 2007-03-16
4351 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
4352 directory information requested inside Tor connections (i.e. via
4353 begin_dir cells). It only triggered when the same connection was
4354 serving other data at the same time. Reported by seeess.
4357 - When creating a circuit via the controller, send a 'launched'
4358 event when we're done, so we follow the spec better.
4361 Changes in version 0.1.2.11-rc - 2007-03-15
4362 o Minor bugfixes (controller), reported by daejees:
4363 - Correct the control spec to match how the code actually responds
4364 to 'getinfo addr-mappings/*'.
4365 - The control spec described a GUARDS event, but the code
4366 implemented a GUARD event. Standardize on GUARD, but let people
4370 Changes in version 0.1.2.10-rc - 2007-03-07
4371 o Major bugfixes (Windows):
4372 - Do not load the NT services library functions (which may not exist)
4373 just to detect if we're a service trying to shut down. Now we run
4374 on Win98 and friends again.
4376 o Minor bugfixes (other):
4377 - Clarify a couple of log messages.
4378 - Fix a misleading socks5 error number.
4381 Changes in version 0.1.2.9-rc - 2007-03-02
4382 o Major bugfixes (Windows):
4383 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
4384 of the usual GCC "%llu". This prevents a bug when saving 64-bit
4385 int configuration values: the high-order 32 bits would get
4386 truncated. In particular, we were being bitten by the default
4387 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
4388 and maybe also bug 397.)
4390 o Minor bugfixes (performance):
4391 - Use OpenSSL's AES implementation on platforms where it's faster.
4392 This could save us as much as 10% CPU usage.
4394 o Minor bugfixes (server):
4395 - Do not rotate onion key immediately after setting it for the first
4398 o Minor bugfixes (directory authorities):
4399 - Stop calling servers that have been hibernating for a long time
4400 "stable". Also, stop letting hibernating or obsolete servers affect
4401 uptime and bandwidth cutoffs.
4402 - Stop listing hibernating servers in the v1 directory.
4404 o Minor bugfixes (hidden services):
4405 - Upload hidden service descriptors slightly less often, to reduce
4406 load on authorities.
4408 o Minor bugfixes (other):
4409 - Fix an assert that could trigger if a controller quickly set then
4410 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
4411 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
4413 - Fix a potential race condition in the rpm installer. Found by
4415 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
4416 of 2 as indicating that the server is completely bad; it sometimes
4417 means that the server is just bad for the request in question. (may fix
4418 the last of bug 326.)
4419 - Disable encrypted directory connections when we don't have a server
4420 descriptor for the destination. We'll get this working again in
4424 Changes in version 0.1.2.8-beta - 2007-02-26
4425 o Major bugfixes (crashes):
4426 - Stop crashing when the controller asks us to resetconf more than
4427 one config option at once. (Vidalia 0.0.11 does this.)
4428 - Fix a crash that happened on Win98 when we're given command-line
4429 arguments: don't try to load NT service functions from advapi32.dll
4430 except when we need them. (Bug introduced in 0.1.2.7-alpha;
4432 - Fix a longstanding obscure crash bug that could occur when
4433 we run out of DNS worker processes. (Resolves bug 390.)
4435 o Major bugfixes (hidden services):
4436 - Correctly detect whether hidden service descriptor downloads are
4437 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
4439 o Major bugfixes (accounting):
4440 - When we start during an accounting interval before it's time to wake
4441 up, remember to wake up at the correct time. (May fix bug 342.)
4443 o Minor bugfixes (controller):
4444 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
4445 clear the corresponding on_circuit variable, and remember later
4446 that we don't need to send a redundant CLOSED event. (Resolves part
4448 - Report events where a resolve succeeded or where we got a socks
4449 protocol error correctly, rather than calling both of them
4451 - Change reported stream target addresses to IP consistently when
4452 we finally get the IP from an exit node.
4453 - Send log messages to the controller even if they happen to be very
4456 o Minor bugfixes (other):
4457 - Display correct results when reporting which versions are
4458 recommended, and how recommended they are. (Resolves bug 383.)
4459 - Improve our estimates for directory bandwidth to be less random:
4460 guess that an unrecognized directory will have the average bandwidth
4461 from all known directories, not that it will have the average
4462 bandwidth from those directories earlier than it on the list.
4463 - If we start a server with ClientOnly 1, then set ClientOnly to 0
4464 and hup, stop triggering an assert based on an empty onion_key.
4465 - On platforms with no working mmap() equivalent, don't warn the
4466 user when cached-routers doesn't exist.
4467 - Warn the user when mmap() [or its equivalent] fails for some reason
4468 other than file-not-found.
4469 - Don't warn the user when cached-routers.new doesn't exist: that's
4470 perfectly fine when starting up for the first time.
4471 - When EntryNodes are configured, rebuild the guard list to contain,
4472 in order: the EntryNodes that were guards before; the rest of the
4473 EntryNodes; the nodes that were guards before.
4474 - Mask out all signals in sub-threads; only the libevent signal
4475 handler should be processing them. This should prevent some crashes
4476 on some machines using pthreads. (Patch from coderman.)
4477 - Fix switched arguments on memset in the implementation of
4478 tor_munmap() for systems with no mmap() call.
4479 - When Tor receives a router descriptor that it asked for, but
4480 no longer wants (because it has received fresh networkstatuses
4481 in the meantime), do not warn the user. Cache the descriptor if
4482 we're a cache; drop it if we aren't.
4483 - Make earlier entry guards _really_ get retried when the network
4485 - On a malformed DNS reply, always give an error to the corresponding
4487 - Build with recent libevents on platforms that do not define the
4488 nonstandard types "u_int8_t" and friends.
4490 o Minor features (controller):
4491 - Warn the user when an application uses the obsolete binary v0
4492 control protocol. We're planning to remove support for it during
4493 the next development series, so it's good to give people some
4495 - Add STREAM_BW events to report per-entry-stream bandwidth
4496 use. (Patch from Robert Hogan.)
4497 - Rate-limit SIGNEWNYM signals in response to controllers that
4498 impolitely generate them for every single stream. (Patch from
4499 mwenge; closes bug 394.)
4500 - Make REMAP stream events have a SOURCE (cache or exit), and
4501 make them generated in every case where we get a successful
4502 connected or resolved cell.
4504 o Minor bugfixes (performance):
4505 - Call router_have_min_dir_info half as often. (This is showing up in
4506 some profiles, but not others.)
4507 - When using GCC, make log_debug never get called at all, and its
4508 arguments never get evaluated, when no debug logs are configured.
4509 (This is showing up in some profiles, but not others.)
4512 - Remove some never-implemented options. Mark PathlenCoinWeight as
4514 - Implement proposal 106: Stop requiring clients to have well-formed
4515 certificates; stop checking nicknames in certificates. (Clients
4516 have certificates so that they can look like Tor servers, but in
4517 the future we might want to allow them to look like regular TLS
4518 clients instead. Nicknames in certificates serve no purpose other
4519 than making our protocol easier to recognize on the wire.)
4520 - Revise messages on handshake failure again to be even more clear about
4521 which are incoming connections and which are outgoing.
4522 - Discard any v1 directory info that's over 1 month old (for
4523 directories) or over 1 week old (for running-routers lists).
4524 - Do not warn when individual nodes in the configuration's EntryNodes,
4525 ExitNodes, etc are down: warn only when all possible nodes
4526 are down. (Fixes bug 348.)
4527 - Always remove expired routers and networkstatus docs before checking
4528 whether we have enough information to build circuits. (Fixes
4530 - Put a lower-bound on MaxAdvertisedBandwidth.
4533 Changes in version 0.1.2.7-alpha - 2007-02-06
4534 o Major bugfixes (rate limiting):
4535 - Servers decline directory requests much more aggressively when
4536 they're low on bandwidth. Otherwise they end up queueing more and
4537 more directory responses, which can't be good for latency.
4538 - But never refuse directory requests from local addresses.
4539 - Fix a memory leak when sending a 503 response for a networkstatus
4541 - Be willing to read or write on local connections (e.g. controller
4542 connections) even when the global rate limiting buckets are empty.
4543 - If our system clock jumps back in time, don't publish a negative
4544 uptime in the descriptor. Also, don't let the global rate limiting
4545 buckets go absurdly negative.
4546 - Flush local controller connection buffers periodically as we're
4547 writing to them, so we avoid queueing 4+ megabytes of data before
4550 o Major bugfixes (NT services):
4551 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
4552 command-line flag so that admins can override the default by saying
4553 "tor --service install --user "SomeUser"". This will not affect
4554 existing installed services. Also, warn the user that the service
4555 will look for its configuration file in the service user's
4556 %appdata% directory. (We can't do the 'hardwire the user's appdata
4557 directory' trick any more, since we may not have read access to that
4560 o Major bugfixes (other):
4561 - Previously, we would cache up to 16 old networkstatus documents
4562 indefinitely, if they came from nontrusted authorities. Now we
4563 discard them if they are more than 10 days old.
4564 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
4566 - Detect and reject malformed DNS responses containing circular
4568 - If exits are rare enough that we're not marking exits as guards,
4569 ignore exit bandwidth when we're deciding the required bandwidth
4571 - When we're handling a directory connection tunneled over Tor,
4572 don't fill up internal memory buffers with all the data we want
4573 to tunnel; instead, only add it if the OR connection that will
4574 eventually receive it has some room for it. (This can lead to
4575 slowdowns in tunneled dir connections; a better solution will have
4578 o Minor bugfixes (dns):
4579 - Add some defensive programming to eventdns.c in an attempt to catch
4580 possible memory-stomping bugs.
4581 - Detect and reject DNS replies containing IPv4 or IPv6 records with
4582 an incorrect number of bytes. (Previously, we would ignore the
4584 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
4585 in the correct order, and doesn't crash.
4586 - Free memory held in recently-completed DNS lookup attempts on exit.
4587 This was not a memory leak, but may have been hiding memory leaks.
4588 - Handle TTL values correctly on reverse DNS lookups.
4589 - Treat failure to parse resolv.conf as an error.
4591 o Minor bugfixes (other):
4592 - Fix crash with "tor --list-fingerprint" (reported by seeess).
4593 - When computing clock skew from directory HTTP headers, consider what
4594 time it was when we finished asking for the directory, not what
4596 - Expire socks connections if they spend too long waiting for the
4597 handshake to finish. Previously we would let them sit around for
4598 days, if the connecting application didn't close them either.
4599 - And if the socks handshake hasn't started, don't send a
4600 "DNS resolve socks failed" handshake reply; just close it.
4601 - Stop using C functions that OpenBSD's linker doesn't like.
4602 - Don't launch requests for descriptors unless we have networkstatuses
4603 from at least half of the authorities. This delays the first
4604 download slightly under pathological circumstances, but can prevent
4605 us from downloading a bunch of descriptors we don't need.
4606 - Do not log IPs with TLS failures for incoming TLS
4607 connections. (Fixes bug 382.)
4608 - If the user asks to use invalid exit nodes, be willing to use
4610 - Stop using the reserved ac_cv namespace in our configure script.
4611 - Call stat() slightly less often; use fstat() when possible.
4612 - Refactor the way we handle pending circuits when an OR connection
4613 completes or fails, in an attempt to fix a rare crash bug.
4614 - Only rewrite a conn's address based on X-Forwarded-For: headers
4615 if it's a parseable public IP address; and stop adding extra quotes
4616 to the resulting address.
4619 - Weight directory requests by advertised bandwidth. Now we can
4620 let servers enable write limiting but still allow most clients to
4621 succeed at their directory requests. (We still ignore weights when
4622 choosing a directory authority; I hope this is a feature.)
4625 - Create a new file ReleaseNotes which was the old ChangeLog. The
4626 new ChangeLog file now includes the summaries for all development
4628 - Check for addresses with invalid characters at the exit as well
4629 as at the client, and warn less verbosely when they fail. You can
4630 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
4631 - Adapt a patch from goodell to let the contrib/exitlist script
4632 take arguments rather than require direct editing.
4633 - Inform the server operator when we decide not to advertise a
4634 DirPort due to AccountingMax enabled or a low BandwidthRate. It
4635 was confusing Zax, so now we're hopefully more helpful.
4636 - Bring us one step closer to being able to establish an encrypted
4637 directory tunnel without knowing a descriptor first. Still not
4638 ready yet. As part of the change, now assume we can use a
4639 create_fast cell if we don't know anything about a router.
4640 - Allow exit nodes to use nameservers running on ports other than 53.
4641 - Servers now cache reverse DNS replies.
4642 - Add an --ignore-missing-torrc command-line option so that we can
4643 get the "use sensible defaults if the configuration file doesn't
4644 exist" behavior even when specifying a torrc location on the command
4647 o Minor features (controller):
4648 - Track reasons for OR connection failure; make these reasons
4649 available via the controller interface. (Patch from Mike Perry.)
4650 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
4651 can learn when clients are sending malformed hostnames to Tor.
4652 - Clean up documentation for controller status events.
4653 - Add a REMAP status to stream events to note that a stream's
4654 address has changed because of a cached address or a MapAddress
4658 Changes in version 0.1.2.6-alpha - 2007-01-09
4660 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
4661 connection handles more than 4 gigs in either direction, we crash.
4662 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
4663 advertised exit node, somebody might try to exit from us when
4664 we're bootstrapping and before we've built our descriptor yet.
4665 Refuse the connection rather than crashing.
4668 - Warn if we (as a server) find that we've resolved an address that we
4669 weren't planning to resolve.
4670 - Warn that using select() on any libevent version before 1.1 will be
4671 unnecessarily slow (even for select()).
4672 - Flush ERR-level controller status events just like we currently
4673 flush ERR-level log events, so that a Tor shutdown doesn't prevent
4674 the controller from learning about current events.
4676 o Minor features (more controller status events):
4677 - Implement EXTERNAL_ADDRESS server status event so controllers can
4678 learn when our address changes.
4679 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
4680 can learn when directories reject our descriptor.
4681 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
4682 can learn when a client application is speaking a non-socks protocol
4684 - Implement DANGEROUS_SOCKS client status event so controllers
4685 can learn when a client application is leaking DNS addresses.
4686 - Implement BUG general status event so controllers can learn when
4687 Tor is unhappy about its internal invariants.
4688 - Implement CLOCK_SKEW general status event so controllers can learn
4689 when Tor thinks the system clock is set incorrectly.
4690 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
4691 server status events so controllers can learn when their descriptors
4692 are accepted by a directory.
4693 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
4694 server status events so controllers can learn about Tor's progress in
4695 deciding whether it's reachable from the outside.
4696 - Implement BAD_LIBEVENT general status event so controllers can learn
4697 when we have a version/method combination in libevent that needs to
4699 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
4700 and DNS_USELESS server status events so controllers can learn
4701 about changes to DNS server status.
4703 o Minor features (directory):
4704 - Authorities no longer recommend exits as guards if this would shift
4705 too much load to the exit nodes.
4708 Changes in version 0.1.2.5-alpha - 2007-01-06
4710 - Enable write limiting as well as read limiting. Now we sacrifice
4711 capacity if we're pushing out lots of directory traffic, rather
4712 than overrunning the user's intended bandwidth limits.
4713 - Include TLS overhead when counting bandwidth usage; previously, we
4714 would count only the bytes sent over TLS, but not the bytes used
4716 - Support running the Tor service with a torrc not in the same
4717 directory as tor.exe and default to using the torrc located in
4718 the %appdata%\Tor\ of the user who installed the service. Patch
4720 - Servers now check for the case when common DNS requests are going to
4721 wildcarded addresses (i.e. all getting the same answer), and change
4722 their exit policy to reject *:* if it's happening.
4723 - Implement BEGIN_DIR cells, so we can connect to the directory
4724 server via TLS to do encrypted directory requests rather than
4725 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
4726 config options if you like.
4728 o Minor features (config and docs):
4729 - Start using the state file to store bandwidth accounting data:
4730 the bw_accounting file is now obsolete. We'll keep generating it
4731 for a while for people who are still using 0.1.2.4-alpha.
4732 - Try to batch changes to the state file so that we do as few
4733 disk writes as possible while still storing important things in
4735 - The state file and the bw_accounting file get saved less often when
4736 the AvoidDiskWrites config option is set.
4737 - Make PIDFile work on Windows (untested).
4738 - Add internal descriptions for a bunch of configuration options:
4739 accessible via controller interface and in comments in saved
4741 - Reject *:563 (NNTPS) in the default exit policy. We already reject
4742 NNTP by default, so this seems like a sensible addition.
4743 - Clients now reject hostnames with invalid characters. This should
4744 avoid some inadvertent info leaks. Add an option
4745 AllowNonRFC953Hostnames to disable this behavior, in case somebody
4746 is running a private network with hosts called @, !, and #.
4747 - Add a maintainer script to tell us which options are missing
4748 documentation: "make check-docs".
4749 - Add a new address-spec.txt document to describe our special-case
4750 addresses: .exit, .onion, and .noconnnect.
4752 o Minor features (DNS):
4753 - Ongoing work on eventdns infrastructure: now it has dns server
4754 and ipv6 support. One day Tor will make use of it.
4755 - Add client-side caching for reverse DNS lookups.
4756 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
4757 - When we change nameservers or IP addresses, reset and re-launch
4758 our tests for DNS hijacking.
4760 o Minor features (directory):
4761 - Authorities now specify server versions in networkstatus. This adds
4762 about 2% to the size of compressed networkstatus docs, and allows
4763 clients to tell which servers support BEGIN_DIR and which don't.
4764 The implementation is forward-compatible with a proposed future
4765 protocol version scheme not tied to Tor versions.
4766 - DirServer configuration lines now have an orport= option so
4767 clients can open encrypted tunnels to the authorities without
4768 having downloaded their descriptors yet. Enabled for moria1,
4769 moria2, tor26, and lefkada now in the default configuration.
4770 - Directory servers are more willing to send a 503 "busy" if they
4771 are near their write limit, especially for v1 directory requests.
4772 Now they can use their limited bandwidth for actual Tor traffic.
4773 - Clients track responses with status 503 from dirservers. After a
4774 dirserver has given us a 503, we try not to use it until an hour has
4775 gone by, or until we have no dirservers that haven't given us a 503.
4776 - When we get a 503 from a directory, and we're not a server, we don't
4777 count the failure against the total number of failures allowed
4778 for the thing we're trying to download.
4779 - Report X-Your-Address-Is correctly from tunneled directory
4780 connections; don't report X-Your-Address-Is when it's an internal
4781 address; and never believe reported remote addresses when they're
4783 - Protect against an unlikely DoS attack on directory servers.
4784 - Add a BadDirectory flag to network status docs so that authorities
4785 can (eventually) tell clients about caches they believe to be
4788 o Minor features (controller):
4789 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
4790 - Reimplement GETINFO so that info/names stays in sync with the
4792 - Implement "GETINFO fingerprint".
4793 - Implement "SETEVENTS GUARD" so controllers can get updates on
4794 entry guard status as it changes.
4796 o Minor features (clean up obsolete pieces):
4797 - Remove some options that have been deprecated since at least
4798 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
4799 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
4801 - We no longer look for identity and onion keys in "identity.key" and
4802 "onion.key" -- these were replaced by secret_id_key and
4803 secret_onion_key in 0.0.8pre1.
4804 - We no longer require unrecognized directory entries to be
4807 o Major bugfixes (security):
4808 - Stop sending the HttpProxyAuthenticator string to directory
4809 servers when directory connections are tunnelled through Tor.
4810 - Clients no longer store bandwidth history in the state file.
4811 - Do not log introduction points for hidden services if SafeLogging
4813 - When generating bandwidth history, round down to the nearest
4814 1k. When storing accounting data, round up to the nearest 1k.
4815 - When we're running as a server, remember when we last rotated onion
4816 keys, so that we will rotate keys once they're a week old even if
4817 we never stay up for a week ourselves.
4819 o Major bugfixes (other):
4820 - Fix a longstanding bug in eventdns that prevented the count of
4821 timed-out resolves from ever being reset. This bug caused us to
4822 give up on a nameserver the third time it timed out, and try it
4823 10 seconds later... and to give up on it every time it timed out
4825 - Take out the '5 second' timeout from the connection retry
4826 schedule. Now the first connect attempt will wait a full 10
4827 seconds before switching to a new circuit. Perhaps this will help
4828 a lot. Based on observations from Mike Perry.
4829 - Fix a bug on the Windows implementation of tor_mmap_file() that
4830 would prevent the cached-routers file from ever loading. Reported
4834 - Fix an assert failure when a directory authority sets
4835 AuthDirRejectUnlisted and then receives a descriptor from an
4836 unlisted router. Reported by seeess.
4837 - Avoid a double-free when parsing malformed DirServer lines.
4838 - Fix a bug when a BSD-style PF socket is first used. Patch from
4840 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
4841 to resolve an address at a given exit node even when they ask for
4843 - Servers no longer ever list themselves in their "family" line,
4844 even if configured to do so. This makes it easier to configure
4845 family lists conveniently.
4846 - When running as a server, don't fall back to 127.0.0.1 when no
4847 nameservers are configured in /etc/resolv.conf; instead, make the
4848 user fix resolv.conf or specify nameservers explicitly. (Resolves
4850 - Stop accepting certain malformed ports in configured exit policies.
4851 - Don't re-write the fingerprint file every restart, unless it has
4853 - Stop warning when a single nameserver fails: only warn when _all_ of
4854 our nameservers have failed. Also, when we only have one nameserver,
4855 raise the threshold for deciding that the nameserver is dead.
4856 - Directory authorities now only decide that routers are reachable
4857 if their identity keys are as expected.
4858 - When the user uses bad syntax in the Log config line, stop
4859 suggesting other bad syntax as a replacement.
4860 - Correctly detect ipv6 DNS capability on OpenBSD.
4862 o Minor bugfixes (controller):
4863 - Report the circuit number correctly in STREAM CLOSED events. Bug
4864 reported by Mike Perry.
4865 - Do not report bizarre values for results of accounting GETINFOs
4866 when the last second's write or read exceeds the allotted bandwidth.
4867 - Report "unrecognized key" rather than an empty string when the
4868 controller tries to fetch a networkstatus that doesn't exist.
4871 Changes in version 0.1.1.26 - 2006-12-14
4872 o Security bugfixes:
4873 - Stop sending the HttpProxyAuthenticator string to directory
4874 servers when directory connections are tunnelled through Tor.
4875 - Clients no longer store bandwidth history in the state file.
4876 - Do not log introduction points for hidden services if SafeLogging
4880 - Fix an assert failure when a directory authority sets
4881 AuthDirRejectUnlisted and then receives a descriptor from an
4882 unlisted router (reported by seeess).
4885 Changes in version 0.1.2.4-alpha - 2006-12-03
4887 - Add support for using natd; this allows FreeBSDs earlier than
4888 5.1.2 to have ipfw send connections through Tor without using
4889 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
4892 - Make all connections to addresses of the form ".noconnect"
4893 immediately get closed. This lets application/controller combos
4894 successfully test whether they're talking to the same Tor by
4895 watching for STREAM events.
4896 - Make cross.sh cross-compilation script work even when autogen.sh
4897 hasn't been run. (Patch from Michael Mohr.)
4898 - Statistics dumped by -USR2 now include a breakdown of public key
4899 operations, for profiling.
4902 - Fix a major leak when directory authorities parse their
4903 approved-routers list, a minor memory leak when we fail to pick
4904 an exit node, and a few rare leaks on errors.
4905 - Handle TransPort connections even when the server sends data before
4906 the client sends data. Previously, the connection would just hang
4907 until the client sent data. (Patch from tup based on patch from
4909 - Avoid assert failure when our cached-routers file is empty on
4913 - Don't log spurious warnings when we see a circuit close reason we
4914 don't recognize; it's probably just from a newer version of Tor.
4915 - Have directory authorities allow larger amounts of drift in uptime
4916 without replacing the server descriptor: previously, a server that
4917 restarted every 30 minutes could have 48 "interesting" descriptors
4919 - Start linking to the Tor specification and Tor reference manual
4920 correctly in the Windows installer.
4921 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4922 Tor/Privoxy we also uninstall Vidalia.
4923 - Resume building on Irix64, and fix a lot of warnings from its
4925 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
4926 when we're running as a client.
4929 Changes in version 0.1.1.25 - 2006-11-04
4931 - When a client asks us to resolve (rather than connect to)
4932 an address, and we have a cached answer, give them the cached
4933 answer. Previously, we would give them no answer at all.
4934 - We were building exactly the wrong circuits when we predict
4935 hidden service requirements, meaning Tor would have to build all
4936 its circuits on demand.
4937 - If none of our live entry guards have a high uptime, but we
4938 require a guard with a high uptime, try adding a new guard before
4939 we give up on the requirement. This patch should make long-lived
4940 connections more stable on average.
4941 - When testing reachability of our DirPort, don't launch new
4942 tests when there's already one in progress -- unreachable
4943 servers were stacking up dozens of testing streams.
4945 o Security bugfixes:
4946 - When the user sends a NEWNYM signal, clear the client-side DNS
4947 cache too. Otherwise we continue to act on previous information.
4950 - Avoid a memory corruption bug when creating a hash table for
4952 - Avoid possibility of controller-triggered crash when misusing
4953 certain commands from a v0 controller on platforms that do not
4954 handle printf("%s",NULL) gracefully.
4955 - Avoid infinite loop on unexpected controller input.
4956 - Don't log spurious warnings when we see a circuit close reason we
4957 don't recognize; it's probably just from a newer version of Tor.
4958 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4959 Tor/Privoxy we also uninstall Vidalia.
4962 Changes in version 0.1.2.3-alpha - 2006-10-29
4964 - Prepare for servers to publish descriptors less often: never
4965 discard a descriptor simply for being too old until either it is
4966 recommended by no authorities, or until we get a better one for
4967 the same router. Make caches consider retaining old recommended
4968 routers for even longer.
4969 - If most authorities set a BadExit flag for a server, clients
4970 don't think of it as a general-purpose exit. Clients only consider
4971 authorities that advertise themselves as listing bad exits.
4972 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
4973 headers for content, so that we can work better in the presence of
4974 caching HTTP proxies.
4975 - Allow authorities to list nodes as bad exits by fingerprint or by
4978 o Minor features, controller:
4979 - Add a REASON field to CIRC events; for backward compatibility, this
4980 field is sent only to controllers that have enabled the extended
4981 event format. Also, add additional reason codes to explain why
4982 a given circuit has been destroyed or truncated. (Patches from
4984 - Add a REMOTE_REASON field to extended CIRC events to tell the
4985 controller about why a remote OR told us to close a circuit.
4986 - Stream events also now have REASON and REMOTE_REASON fields,
4987 working much like those for circuit events.
4988 - There's now a GETINFO ns/... field so that controllers can ask Tor
4989 about the current status of a router.
4990 - A new event type "NS" to inform a controller when our opinion of
4991 a router's status has changed.
4992 - Add a GETINFO events/names and GETINFO features/names so controllers
4993 can tell which events and features are supported.
4994 - A new CLEARDNSCACHE signal to allow controllers to clear the
4995 client-side DNS cache without expiring circuits.
4997 o Security bugfixes:
4998 - When the user sends a NEWNYM signal, clear the client-side DNS
4999 cache too. Otherwise we continue to act on previous information.
5002 - Avoid sending junk to controllers or segfaulting when a controller
5003 uses EVENT_NEW_DESC with verbose nicknames.
5004 - Stop triggering asserts if the controller tries to extend hidden
5005 service circuits (reported by mwenge).
5006 - Avoid infinite loop on unexpected controller input.
5007 - When the controller does a "GETINFO network-status", tell it
5008 about even those routers whose descriptors are very old, and use
5009 long nicknames where appropriate.
5010 - Change NT service functions to be loaded on demand. This lets us
5011 build with MinGW without breaking Tor for Windows 98 users.
5012 - Do DirPort reachability tests less often, since a single test
5013 chews through many circuits before giving up.
5014 - In the hidden service example in torrc.sample, stop recommending
5015 esoteric and discouraged hidden service options.
5016 - When stopping an NT service, wait up to 10 sec for it to actually
5017 stop. (Patch from Matt Edman; resolves bug 295.)
5018 - Fix handling of verbose nicknames with ORCONN controller events:
5019 make them show up exactly when requested, rather than exactly when
5021 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
5022 printing a duplicate "$" in the keys we send (reported by mwenge).
5023 - Correctly set maximum connection limit on Cygwin. (This time
5025 - Try to detect Windows correctly when cross-compiling.
5026 - Detect the size of the routers file correctly even if it is
5027 corrupted (on systems without mmap) or not page-aligned (on systems
5028 with mmap). This bug was harmless.
5029 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
5030 to open a stream fails; now we do in more cases. This should
5031 make clients able to find a good exit faster in some cases, since
5032 unhandleable requests will now get an error rather than timing out.
5033 - Resolve two memory leaks when rebuilding the on-disk router cache
5034 (reported by fookoowa).
5035 - Clean up minor code warnings suggested by the MIPSpro C compiler,
5036 and reported by some Centos users.
5037 - Controller signals now work on non-Unix platforms that don't define
5038 SIGUSR1 and SIGUSR2 the way we expect.
5039 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
5040 values before failing, and always enables eventdns.
5041 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
5042 Try to fix this in configure.in by checking for most functions
5043 before we check for libevent.
5046 Changes in version 0.1.2.2-alpha - 2006-10-07
5048 - Make our async eventdns library on-by-default for Tor servers,
5049 and plan to deprecate the separate dnsworker threads.
5050 - Add server-side support for "reverse" DNS lookups (using PTR
5051 records so clients can determine the canonical hostname for a given
5052 IPv4 address). Only supported by servers using eventdns; servers
5053 now announce in their descriptors whether they support eventdns.
5054 - Specify and implement client-side SOCKS5 interface for reverse DNS
5055 lookups (see doc/socks-extensions.txt).
5056 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
5057 connect to directory servers through Tor. Previously, clients needed
5058 to find Tor exits to make private connections to directory servers.
5059 - Avoid choosing Exit nodes for entry or middle hops when the
5060 total bandwidth available from non-Exit nodes is much higher than
5061 the total bandwidth available from Exit nodes.
5062 - Workaround for name servers (like Earthlink's) that hijack failing
5063 DNS requests and replace the no-such-server answer with a "helpful"
5064 redirect to an advertising-driven search portal. Also work around
5065 DNS hijackers who "helpfully" decline to hijack known-invalid
5066 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
5067 lets you turn it off.
5068 - Send out a burst of long-range padding cells once we've established
5069 that we're reachable. Spread them over 4 circuits, so hopefully
5070 a few will be fast. This exercises our bandwidth and bootstraps
5071 us into the directory more quickly.
5073 o New/improved config options:
5074 - Add new config option "ResolvConf" to let the server operator
5075 choose an alternate resolve.conf file when using eventdns.
5076 - Add an "EnforceDistinctSubnets" option to control our "exclude
5077 servers on the same /16" behavior. It's still on by default; this
5078 is mostly for people who want to operate private test networks with
5079 all the machines on the same subnet.
5080 - If one of our entry guards is on the ExcludeNodes list, or the
5081 directory authorities don't think it's a good guard, treat it as
5082 if it were unlisted: stop using it as a guard, and throw it off
5083 the guards list if it stays that way for a long time.
5084 - Allow directory authorities to be marked separately as authorities
5085 for the v1 directory protocol, the v2 directory protocol, and
5086 as hidden service directories, to make it easier to retire old
5087 authorities. V1 authorities should set "HSAuthoritativeDir 1"
5088 to continue being hidden service authorities too.
5089 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
5091 o Minor features, controller:
5092 - Fix CIRC controller events so that controllers can learn the
5093 identity digests of non-Named servers used in circuit paths.
5094 - Let controllers ask for more useful identifiers for servers. Instead
5095 of learning identity digests for un-Named servers and nicknames
5096 for Named servers, the new identifiers include digest, nickname,
5097 and indication of Named status. Off by default; see control-spec.txt
5098 for more information.
5099 - Add a "getinfo address" controller command so it can display Tor's
5100 best guess to the user.
5101 - New controller event to alert the controller when our server
5102 descriptor has changed.
5103 - Give more meaningful errors on controller authentication failure.
5105 o Minor features, other:
5106 - When asked to resolve a hostname, don't use non-exit servers unless
5107 requested to do so. This allows servers with broken DNS to be
5108 useful to the network.
5109 - Divide eventdns log messages into warn and info messages.
5110 - Reserve the nickname "Unnamed" for routers that can't pick
5111 a hostname: any router can call itself Unnamed; directory
5112 authorities will never allocate Unnamed to any particular router;
5113 clients won't believe that any router is the canonical Unnamed.
5114 - Only include function names in log messages for info/debug messages.
5115 For notice/warn/err, the content of the message should be clear on
5116 its own, and printing the function name only confuses users.
5117 - Avoid some false positives during reachability testing: don't try
5118 to test via a server that's on the same /24 as us.
5119 - If we fail to build a circuit to an intended enclave, and it's
5120 not mandatory that we use that enclave, stop wanting it.
5121 - When eventdns is enabled, allow multithreaded builds on NetBSD and
5122 OpenBSD. (We had previously disabled threads on these platforms
5123 because they didn't have working thread-safe resolver functions.)
5125 o Major bugfixes, anonymity/security:
5126 - If a client asked for a server by name, and there's a named server
5127 in our network-status but we don't have its descriptor yet, we
5128 could return an unnamed server instead.
5129 - Fix NetBSD bug that could allow someone to force uninitialized RAM
5130 to be sent to a server's DNS resolver. This only affects NetBSD
5131 and other platforms that do not bounds-check tolower().
5132 - Reject (most) attempts to use Tor circuits with length one. (If
5133 many people start using Tor as a one-hop proxy, exit nodes become
5134 a more attractive target for compromise.)
5135 - Just because your DirPort is open doesn't mean people should be
5136 able to remotely teach you about hidden service descriptors. Now
5137 only accept rendezvous posts if you've got HSAuthoritativeDir set.
5139 o Major bugfixes, other:
5140 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
5141 - When a client asks the server to resolve (not connect to)
5142 an address, and it has a cached answer, give them the cached answer.
5143 Previously, the server would give them no answer at all.
5144 - Allow really slow clients to not hang up five minutes into their
5145 directory downloads (suggested by Adam J. Richter).
5146 - We were building exactly the wrong circuits when we anticipated
5147 hidden service requirements, meaning Tor would have to build all
5148 its circuits on demand.
5149 - Avoid crashing when we mmap a router cache file of size 0.
5150 - When testing reachability of our DirPort, don't launch new
5151 tests when there's already one in progress -- unreachable
5152 servers were stacking up dozens of testing streams.
5154 o Minor bugfixes, correctness:
5155 - If we're a directory mirror and we ask for "all" network status
5156 documents, we would discard status documents from authorities
5158 - Avoid a memory corruption bug when creating a hash table for
5160 - Avoid controller-triggered crash when misusing certain commands
5161 from a v0 controller on platforms that do not handle
5162 printf("%s",NULL) gracefully.
5163 - Don't crash when a controller sends a third argument to an
5164 "extendcircuit" request.
5165 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
5166 response; fix error code when "getinfo dir/status/" fails.
5167 - Avoid crash when telling controller stream-status and a stream
5169 - Patch from Adam Langley to fix assert() in eventdns.c.
5170 - Fix a debug log message in eventdns to say "X resolved to Y"
5171 instead of "X resolved to X".
5172 - Make eventdns give strings for DNS errors, not just error numbers.
5173 - Track unreachable entry guards correctly: don't conflate
5174 'unreachable by us right now' with 'listed as down by the directory
5175 authorities'. With the old code, if a guard was unreachable by
5176 us but listed as running, it would clog our guard list forever.
5177 - Behave correctly in case we ever have a network with more than
5178 2GB/s total advertised capacity.
5179 - Make TrackExitHosts case-insensitive, and fix the behavior of
5180 ".suffix" TrackExitHosts items to avoid matching in the middle of
5182 - Finally fix the openssl warnings from newer gccs that believe that
5183 ignoring a return value is okay, but casting a return value and
5184 then ignoring it is a sign of madness.
5185 - Prevent the contrib/exitlist script from printing the same
5186 result more than once.
5187 - Patch from Steve Hildrey: Generate network status correctly on
5188 non-versioning dirservers.
5189 - Don't listen to the X-Your-Address-Is hint if you did the lookup
5190 via Tor; otherwise you'll think you're the exit node's IP address.
5192 o Minor bugfixes, performance:
5193 - Two small performance improvements on parsing descriptors.
5194 - Major performance improvement on inserting descriptors: change
5195 algorithm from O(n^2) to O(n).
5196 - Make the common memory allocation path faster on machines where
5197 malloc(0) returns a pointer.
5198 - Start remembering X-Your-Address-Is directory hints even if you're
5199 a client, so you can become a server more smoothly.
5200 - Avoid duplicate entries on MyFamily line in server descriptor.
5202 o Packaging, features:
5203 - Remove architecture from OS X builds. The official builds are
5204 now universal binaries.
5205 - The Debian package now uses --verify-config when (re)starting,
5206 to distinguish configuration errors from other errors.
5207 - Update RPMs to require libevent 1.1b.
5209 o Packaging, bugfixes:
5210 - Patches so Tor builds with MinGW on Windows.
5211 - Patches so Tor might run on Cygwin again.
5212 - Resume building on non-gcc compilers and ancient gcc. Resume
5213 building with the -O0 compile flag. Resume building cleanly on
5215 - Run correctly on OS X platforms with case-sensitive filesystems.
5216 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
5217 - Add autoconf checks so Tor can build on Solaris x86 again.
5220 - Documented (and renamed) ServerDNSSearchDomains and
5221 ServerDNSResolvConfFile options.
5222 - Be clearer that the *ListenAddress directives can be repeated
5226 Changes in version 0.1.1.24 - 2006-09-29
5228 - Allow really slow clients to not hang up five minutes into their
5229 directory downloads (suggested by Adam J. Richter).
5230 - Fix major performance regression from 0.1.0.x: instead of checking
5231 whether we have enough directory information every time we want to
5232 do something, only check when the directory information has changed.
5233 This should improve client CPU usage by 25-50%.
5234 - Don't crash if, after a server has been running for a while,
5235 it can't resolve its hostname.
5238 - Allow Tor to start when RunAsDaemon is set but no logs are set.
5239 - Don't crash when the controller receives a third argument to an
5240 "extendcircuit" request.
5241 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
5242 response; fix error code when "getinfo dir/status/" fails.
5243 - Fix configure.in to not produce broken configure files with
5244 more recent versions of autoconf. Thanks to Clint for his auto*
5246 - Fix security bug on NetBSD that could allow someone to force
5247 uninitialized RAM to be sent to a server's DNS resolver. This
5248 only affects NetBSD and other platforms that do not bounds-check
5250 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
5251 methods: these are known to be buggy.
5252 - If we're a directory mirror and we ask for "all" network status
5253 documents, we would discard status documents from authorities
5257 Changes in version 0.1.2.1-alpha - 2006-08-27
5259 - Add "eventdns" async dns library from Adam Langley, tweaked to
5260 build on OSX and Windows. Only enabled if you pass the
5261 --enable-eventdns argument to configure.
5262 - Allow servers with no hostname or IP address to learn their
5263 IP address by asking the directory authorities. This code only
5264 kicks in when you would normally have exited with a "no address"
5265 error. Nothing's authenticated, so use with care.
5266 - Rather than waiting a fixed amount of time between retrying
5267 application connections, we wait only 5 seconds for the first,
5268 10 seconds for the second, and 15 seconds for each retry after
5269 that. Hopefully this will improve the expected user experience.
5270 - Patch from Tup to add support for transparent AP connections:
5271 this basically bundles the functionality of trans-proxy-tor
5272 into the Tor mainline. Now hosts with compliant pf/netfilter
5273 implementations can redirect TCP connections straight to Tor
5274 without diverting through SOCKS. Needs docs.
5275 - Busy directory servers save lots of memory by spooling server
5276 descriptors, v1 directories, and v2 networkstatus docs to buffers
5277 as needed rather than en masse. Also mmap the cached-routers
5278 files, so we don't need to keep the whole thing in memory too.
5279 - Automatically avoid picking more than one node from the same
5280 /16 network when constructing a circuit.
5281 - Revise and clean up the torrc.sample that we ship with; add
5282 a section for BandwidthRate and BandwidthBurst.
5285 - Split circuit_t into origin_circuit_t and or_circuit_t, and
5286 split connection_t into edge, or, dir, control, and base structs.
5287 These will save quite a bit of memory on busy servers, and they'll
5288 also help us track down bugs in the code and bugs in the spec.
5289 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
5290 or later. Log when we are doing this, so we can diagnose it when
5291 it fails. (Also, recommend libevent 1.1b for kqueue and
5292 win32 methods; deprecate libevent 1.0b harder; make libevent
5293 recommendation system saner.)
5294 - Start being able to build universal binaries on OS X (thanks
5296 - Export the default exit policy via the control port, so controllers
5297 don't need to guess what it is / will be later.
5298 - Add a man page entry for ProtocolWarnings.
5299 - Add TestVia config option to the man page.
5300 - Remove even more protocol-related warnings from Tor server logs,
5301 such as bad TLS handshakes and malformed begin cells.
5302 - Stop fetching descriptors if you're not a dir mirror and you
5303 haven't tried to establish any circuits lately. [This currently
5304 causes some dangerous behavior, because when you start up again
5305 you'll use your ancient server descriptors.]
5306 - New DirPort behavior: if you have your dirport set, you download
5307 descriptors aggressively like a directory mirror, whether or not
5309 - Get rid of the router_retry_connections notion. Now routers
5310 no longer try to rebuild long-term connections to directory
5311 authorities, and directory authorities no longer try to rebuild
5312 long-term connections to all servers. We still don't hang up
5313 connections in these two cases though -- we need to look at it
5314 more carefully to avoid flapping, and we likely need to wait til
5315 0.1.1.x is obsolete.
5316 - Drop compatibility with obsolete Tors that permit create cells
5317 to have the wrong circ_id_type.
5318 - Re-enable per-connection rate limiting. Get rid of the "OP
5319 bandwidth" concept. Lay groundwork for "bandwidth classes" --
5320 separate global buckets that apply depending on what sort of conn
5322 - Start publishing one minute or so after we find our ORPort
5323 to be reachable. This will help reduce the number of descriptors
5324 we have for ourselves floating around, since it's quite likely
5325 other things (e.g. DirPort) will change during that minute too.
5326 - Fork the v1 directory protocol into its own spec document,
5327 and mark dir-spec.txt as the currently correct (v2) spec.
5330 - When we find our DirPort to be reachable, publish a new descriptor
5331 so we'll tell the world (reported by pnx).
5332 - Publish a new descriptor after we hup/reload. This is important
5333 if our config has changed such that we'll want to start advertising
5334 our DirPort now, etc.
5335 - Allow Tor to start when RunAsDaemon is set but no logs are set.
5336 - When we have a state file we cannot parse, tell the user and
5337 move it aside. Now we avoid situations where the user starts
5338 Tor in 1904, Tor writes a state file with that timestamp in it,
5339 the user fixes her clock, and Tor refuses to start.
5340 - Fix configure.in to not produce broken configure files with
5341 more recent versions of autoconf. Thanks to Clint for his auto*
5343 - "tor --verify-config" now exits with -1(255) or 0 depending on
5344 whether the config options are bad or good.
5345 - Resolve bug 321 when using dnsworkers: append a period to every
5346 address we resolve at the exit node, so that we do not accidentally
5347 pick up local addresses, and so that failing searches are retried
5348 in the resolver search domains. (This is already solved for
5349 eventdns.) (This breaks Blossom servers for now.)
5350 - If we are using an exit enclave and we can't connect, e.g. because
5351 its webserver is misconfigured to not listen on localhost, then
5352 back off and try connecting from somewhere else before we fail.
5355 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
5356 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
5357 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
5358 when the IP address is mapped through MapAddress to a hostname.
5359 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
5360 useless IPv6 DNS resolves.
5361 - Patch suggested by Karsten Loesing: respond to SIGNAL command
5362 before we execute the signal, in case the signal shuts us down.
5363 - Clean up AllowInvalidNodes man page entry.
5364 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
5365 - Add more asserts to track down an assert error on a windows Tor
5366 server with connection_add being called with socket == -1.
5367 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
5368 - Fix misleading log messages: an entry guard that is "unlisted",
5369 as well as not known to be "down" (because we've never heard
5370 of it), is not therefore "up".
5371 - Remove code to special-case "-cvs" ending, since it has not
5372 actually mattered since 0.0.9.
5373 - Make our socks5 handling more robust to broken socks clients:
5374 throw out everything waiting on the buffer in between socks
5375 handshake phases, since they can't possibly (so the theory
5376 goes) have predicted what we plan to respond to them.
5379 Changes in version 0.1.1.23 - 2006-07-30
5381 - Fast Tor servers, especially exit nodes, were triggering asserts
5382 due to a bug in handling the list of pending DNS resolves. Some
5383 bugs still remain here; we're hunting them.
5384 - Entry guards could crash clients by sending unexpected input.
5385 - More fixes on reachability testing: if you find yourself reachable,
5386 then don't ever make any client requests (so you stop predicting
5387 circuits), then hup or have your clock jump, then later your IP
5388 changes, you won't think circuits are working, so you won't try to
5389 test reachability, so you won't publish.
5392 - Avoid a crash if the controller does a resetconf firewallports
5393 and then a setconf fascistfirewall=1.
5394 - Avoid an integer underflow when the dir authority decides whether
5395 a router is stable: we might wrongly label it stable, and compute
5396 a slightly wrong median stability, when a descriptor is published
5398 - Fix a place where we might trigger an assert if we can't build our
5399 own server descriptor yet.
5402 Changes in version 0.1.1.22 - 2006-07-05
5404 - Fix a big bug that was causing servers to not find themselves
5405 reachable if they changed IP addresses. Since only 0.1.1.22+
5406 servers can do reachability testing correctly, now we automatically
5407 make sure to test via one of these.
5408 - Fix to allow clients and mirrors to learn directory info from
5409 descriptor downloads that get cut off partway through.
5410 - Directory authorities had a bug in deciding if a newly published
5411 descriptor was novel enough to make everybody want a copy -- a few
5412 servers seem to be publishing new descriptors many times a minute.
5414 - Fix a rare bug that was causing some servers to complain about
5415 "closing wedged cpuworkers" and skip some circuit create requests.
5416 - Make the Exit flag in directory status documents actually work.
5419 Changes in version 0.1.1.21 - 2006-06-10
5420 o Crash and assert fixes from 0.1.1.20:
5421 - Fix a rare crash on Tor servers that have enabled hibernation.
5422 - Fix a seg fault on startup for Tor networks that use only one
5423 directory authority.
5424 - Fix an assert from a race condition that occurs on Tor servers
5425 while exiting, where various threads are trying to log that they're
5426 exiting, and delete the logs, at the same time.
5427 - Make our unit tests pass again on certain obscure platforms.
5430 - Add support for building SUSE RPM packages.
5431 - Speed up initial bootstrapping for clients: if we are making our
5432 first ever connection to any entry guard, then don't mark it down
5434 - When only one Tor server in the network is labelled as a guard,
5435 and we've already picked him, we would cycle endlessly picking him
5436 again, being unhappy about it, etc. Now we specifically exclude
5437 current guards when picking a new guard.
5438 - Servers send create cells more reliably after the TLS connection
5439 is established: we were sometimes forgetting to send half of them
5440 when we had more than one pending.
5441 - If we get a create cell that asks us to extend somewhere, but the
5442 Tor server there doesn't match the expected digest, we now send
5443 a destroy cell back, rather than silently doing nothing.
5444 - Make options->RedirectExit work again.
5445 - Make cookie authentication for the controller work again.
5446 - Stop being picky about unusual characters in the arguments to
5447 mapaddress. It's none of our business.
5448 - Add a new config option "TestVia" that lets you specify preferred
5449 middle hops to use for test circuits. Perhaps this will let me
5450 debug the reachability problems better.
5452 o Log / documentation fixes:
5453 - If we're a server and some peer has a broken TLS certificate, don't
5454 log about it unless ProtocolWarnings is set, i.e., we want to hear
5455 about protocol violations by others.
5456 - Fix spelling of VirtualAddrNetwork in man page.
5457 - Add a better explanation at the top of the autogenerated torrc file
5458 about what happened to our old torrc.
5461 Changes in version 0.1.1.20 - 2006-05-23
5463 - Downgrade a log severity where servers complain that they're
5465 - Avoid a compile warning on FreeBSD.
5466 - Remove string size limit on NEWDESC messages; solve bug 291.
5467 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
5468 more thoroughly when we're running on windows.
5471 Changes in version 0.1.1.19-rc - 2006-05-03
5473 - Regenerate our local descriptor if it's dirty and we try to use
5474 it locally (e.g. if it changes during reachability detection).
5475 - If we setconf our ORPort to 0, we continued to listen on the
5476 old ORPort and receive connections.
5477 - Avoid a second warning about machine/limits.h on Debian
5479 - Be willing to add our own routerinfo into the routerlist.
5480 Now authorities will include themselves in their directories
5481 and network-statuses.
5482 - Stop trying to upload rendezvous descriptors to every
5483 directory authority: only try the v1 authorities.
5484 - Servers no longer complain when they think they're not
5485 registered with the directory authorities. There were too many
5487 - Backport dist-rpm changes so rpms can be built without errors.
5490 - Implement an option, VirtualAddrMask, to set which addresses
5491 get handed out in response to mapaddress requests. This works
5492 around a bug in tsocks where 127.0.0.0/8 is never socksified.
5495 Changes in version 0.1.1.18-rc - 2006-04-10
5497 - Work harder to download live network-statuses from all the
5498 directory authorities we know about. Improve the threshold
5499 decision logic so we're more robust to edge cases.
5500 - When fetching rendezvous descriptors, we were willing to ask
5501 v2 authorities too, which would always return 404.
5504 - Stop listing down or invalid nodes in the v1 directory. This will
5505 reduce its bulk by about 1/3, and reduce load on directory
5507 - When deciding whether a router is Fast or Guard-worthy, consider
5508 his advertised BandwidthRate and not just the BandwidthCapacity.
5509 - No longer ship INSTALL and README files -- they are useless now.
5510 - Force rpmbuild to behave and honor target_cpu.
5511 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
5512 - Start to include translated versions of the tor-doc-*.html
5513 files, along with the screenshots. Still needs more work.
5514 - Start sending back 512 and 451 errors if mapaddress fails,
5515 rather than not sending anything back at all.
5516 - When we fail to bind or listen on an incoming or outgoing
5517 socket, we should close it before failing. otherwise we just
5518 leak it. (thanks to weasel for finding.)
5519 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
5520 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
5521 - Make NoPublish (even though deprecated) work again.
5522 - Fix a minor security flaw where a versioning auth dirserver
5523 could list a recommended version many times in a row to make
5524 clients more convinced that it's recommended.
5525 - Fix crash bug if there are two unregistered servers running
5526 with the same nickname, one of them is down, and you ask for
5527 them by nickname in your EntryNodes or ExitNodes. Also, try
5528 to pick the one that's running rather than an arbitrary one.
5529 - Fix an infinite loop we could hit if we go offline for too long.
5530 - Complain when we hit WSAENOBUFS on recv() or write() too.
5531 Perhaps this will help us hunt the bug.
5532 - If you're not a versioning dirserver, don't put the string
5533 "client-versions \nserver-versions \n" in your network-status.
5534 - Lower the minimum required number of file descriptors to 1000,
5535 so we can have some overhead for Valgrind on Linux, where the
5536 default ulimit -n is 1024.
5539 - Add tor.dizum.com as the fifth authoritative directory server.
5540 - Add a new config option FetchUselessDescriptors, off by default,
5541 for when you plan to run "exitlist" on your client and you want
5542 to know about even the non-running descriptors.
5545 Changes in version 0.1.1.17-rc - 2006-03-28
5547 - Clients and servers since 0.1.1.10-alpha have been expiring
5548 connections whenever they are idle for 5 minutes and they *do*
5549 have circuits on them. Oops. With this new version, clients will
5550 discard their previous entry guard choices and avoid choosing
5551 entry guards running these flawed versions.
5552 - Fix memory leak when uncompressing concatenated zlib streams. This
5553 was causing substantial leaks over time on Tor servers.
5554 - The v1 directory was including servers as much as 48 hours old,
5555 because that's how the new routerlist->routers works. Now only
5556 include them if they're 20 hours old or less.
5559 - Resume building on irix64, netbsd 2.0, etc.
5560 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
5562 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
5563 and it is confusing some users.
5564 - Mirrors stop caching the v1 directory so often.
5565 - Make the max number of old descriptors that a cache will hold
5566 rise with the number of directory authorities, so we can scale.
5567 - Change our win32 uname() hack to be more forgiving about what
5568 win32 versions it thinks it's found.
5571 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
5573 - When the controller's *setconf commands fail, collect an error
5574 message in a string and hand it back to the controller.
5575 - Make the v2 dir's "Fast" flag based on relative capacity, just
5576 like "Stable" is based on median uptime. Name everything in the
5577 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
5578 - Log server fingerprint on startup, so new server operators don't
5579 have to go hunting around their filesystem for it.
5580 - Return a robots.txt on our dirport to discourage google indexing.
5581 - Let the controller ask for GETINFO dir/status/foo so it can ask
5582 directly rather than connecting to the dir port. Only works when
5583 dirport is set for now.
5585 o New config options rather than constants in the code:
5586 - SocksTimeout: How long do we let a socks connection wait
5587 unattached before we fail it?
5588 - CircuitBuildTimeout: Cull non-open circuits that were born
5589 at least this many seconds ago.
5590 - CircuitIdleTimeout: Cull open clean circuits that were born
5591 at least this many seconds ago.
5594 Changes in version 0.1.1.16-rc - 2006-03-18
5595 o Bugfixes on 0.1.1.15-rc:
5596 - Fix assert when the controller asks to attachstream a connect-wait
5597 or resolve-wait stream.
5598 - Now do address rewriting when the controller asks us to attach
5599 to a particular circuit too. This will let Blossom specify
5600 "moria2.exit" without having to learn what moria2's IP address is.
5601 - Make the "tor --verify-config" command-line work again, so people
5602 can automatically check if their torrc will parse.
5603 - Authoritative dirservers no longer require an open connection from
5604 a server to consider him "reachable". We need this change because
5605 when we add new auth dirservers, old servers won't know not to
5607 - Let Tor build on Sun CC again.
5608 - Fix an off-by-one buffer size in dirserv.c that magically never
5609 hit our three authorities but broke sjmurdoch's own tor network.
5610 - If we as a directory mirror don't know of any v1 directory
5611 authorities, then don't try to cache any v1 directories.
5612 - Stop warning about unknown servers in our family when they are
5613 given as hex digests.
5614 - Stop complaining as quickly to the server operator that he
5615 hasn't registered his nickname/key binding.
5616 - Various cleanups so we can add new V2 Auth Dirservers.
5617 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
5618 reflect the updated flags in our v2 dir protocol.
5619 - Resume allowing non-printable characters for exit streams (both
5620 for connecting and for resolving). Now we tolerate applications
5621 that don't follow the RFCs. But continue to block malformed names
5624 o Bugfixes on 0.1.0.x:
5625 - Fix assert bug in close_logs(): when we close and delete logs,
5626 remove them all from the global "logfiles" list.
5627 - Fix minor integer overflow in calculating when we expect to use up
5628 our bandwidth allocation before hibernating.
5629 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
5630 there are multiple SSLs installed with different versions.
5631 - When we try to be a server and Address is not explicitly set and
5632 our hostname resolves to a private IP address, try to use an
5633 interface address if it has a public address. Now Windows machines
5634 that think of themselves as localhost can work by default.
5637 - Let the controller ask for GETINFO dir/server/foo so it can ask
5638 directly rather than connecting to the dir port.
5639 - Let the controller tell us about certain router descriptors
5640 that it doesn't want Tor to use in circuits. Implement
5641 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
5642 - New config option SafeSocks to reject all application connections
5643 using unsafe socks protocols. Defaults to off.
5646 Changes in version 0.1.1.15-rc - 2006-03-11
5647 o Bugfixes and cleanups:
5648 - When we're printing strings from the network, don't try to print
5649 non-printable characters. This protects us against shell escape
5650 sequence exploits, and also against attacks to fool humans into
5651 misreading their logs.
5652 - Fix a bug where Tor would fail to establish any connections if you
5653 left it off for 24 hours and then started it: we were happy with
5654 the obsolete network statuses, but they all referred to router
5655 descriptors that were too old to fetch, so we ended up with no
5656 valid router descriptors.
5657 - Fix a seg fault in the controller's "getinfo orconn-status"
5658 command while listing status on incoming handshaking connections.
5659 Introduce a status name "NEW" for these connections.
5660 - If we get a linelist or linelist_s config option from the torrc
5661 (e.g. ExitPolicy) and it has no value, warn and skip rather than
5662 silently resetting it to its default.
5663 - Don't abandon entry guards until they've been down or gone for
5665 - Cleaner and quieter log messages.
5668 - New controller signal NEWNYM that makes new application requests
5670 - Add a new circuit purpose 'controller' to let the controller ask
5671 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
5672 controller command to let you specify the purpose if you're
5673 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
5674 command to let you change a circuit's purpose after it's been
5676 - Accept "private:*" in routerdesc exit policies; not generated yet
5677 because older Tors do not understand it.
5678 - Add BSD-style contributed startup script "rc.subr" from Peter
5682 Changes in version 0.1.1.14-alpha - 2006-02-20
5683 o Bugfixes on 0.1.1.x:
5684 - Don't die if we ask for a stdout or stderr log (even implicitly)
5685 and we're set to RunAsDaemon -- just warn.
5686 - We still had a few bugs in the OR connection rotation code that
5687 caused directory servers to slowly aggregate connections to other
5688 fast Tor servers. This time for sure!
5689 - Make log entries on Win32 include the name of the function again.
5690 - We were treating a pair of exit policies if they were equal even
5691 if one said accept and the other said reject -- causing us to
5692 not always publish a new descriptor since we thought nothing
5694 - Retry pending server downloads as well as pending networkstatus
5695 downloads when we unexpectedly get a socks request.
5696 - We were ignoring the IS_FAST flag in the directory status,
5697 meaning we were willing to pick trivial-bandwidth nodes for "fast"
5699 - If the controller's SAVECONF command fails (e.g. due to file
5700 permissions), let the controller know that it failed.
5703 - If we're trying to be a Tor server and running Windows 95/98/ME
5704 as a server, explain that we'll likely crash.
5705 - When we're a server, a client asks for an old-style directory,
5706 and our write bucket is empty, don't give it to him. This way
5707 small servers can continue to serve the directory *sometimes*,
5708 without getting overloaded.
5709 - Compress exit policies even more -- look for duplicate lines
5711 - Clients now honor the "guard" flag in the router status when
5712 picking entry guards, rather than looking at is_fast or is_stable.
5713 - Retain unrecognized lines in $DATADIR/state file, so that we can
5714 be forward-compatible.
5715 - Generate 18.0.0.0/8 address policy format in descs when we can;
5716 warn when the mask is not reducible to a bit-prefix.
5717 - Let the user set ControlListenAddress in the torrc. This can be
5718 dangerous, but there are some cases (like a secured LAN) where it
5720 - Split ReachableAddresses into ReachableDirAddresses and
5721 ReachableORAddresses, so we can restrict Dir conns to port 80
5722 and OR conns to port 443.
5723 - Now we can target arch and OS in rpm builds (contributed by
5724 Phobos). Also make the resulting dist-rpm filename match the
5726 - New config options to help controllers: FetchServerDescriptors
5727 and FetchHidServDescriptors for whether to fetch server
5728 info and hidserv info or let the controller do it, and
5729 PublishServerDescriptor and PublishHidServDescriptors.
5730 - Also let the controller set the __AllDirActionsPrivate config
5731 option if you want all directory fetches/publishes to happen via
5732 Tor (it assumes your controller bootstraps your circuits).
5735 Changes in version 0.1.0.17 - 2006-02-17
5736 o Crash bugfixes on 0.1.0.x:
5737 - When servers with a non-zero DirPort came out of hibernation,
5738 sometimes they would trigger an assert.
5740 o Other important bugfixes:
5741 - On platforms that don't have getrlimit (like Windows), we were
5742 artificially constraining ourselves to a max of 1024
5743 connections. Now just assume that we can handle as many as 15000
5744 connections. Hopefully this won't cause other problems.
5746 o Backported features:
5747 - When we're a server, a client asks for an old-style directory,
5748 and our write bucket is empty, don't give it to him. This way
5749 small servers can continue to serve the directory *sometimes*,
5750 without getting overloaded.
5751 - Whenever you get a 503 in response to a directory fetch, try
5752 once more. This will become important once servers start sending
5753 503's whenever they feel busy.
5754 - Fetch a new directory every 120 minutes, not every 40 minutes.
5755 Now that we have hundreds of thousands of users running the old
5756 directory algorithm, it's starting to hurt a lot.
5757 - Bump up the period for forcing a hidden service descriptor upload
5758 from 20 minutes to 1 hour.
5761 Changes in version 0.1.1.13-alpha - 2006-02-09
5762 o Crashes in 0.1.1.x:
5763 - When you tried to setconf ORPort via the controller, Tor would
5764 crash. So people using TorCP to become a server were sad.
5765 - Solve (I hope) the stack-smashing bug that we were seeing on fast
5766 servers. The problem appears to be something do with OpenSSL's
5767 random number generation, or how we call it, or something. Let me
5768 know if the crashes continue.
5769 - Turn crypto hardware acceleration off by default, until we find
5770 somebody smart who can test it for us. (It appears to produce
5771 seg faults in at least some cases.)
5772 - Fix a rare assert error when we've tried all intro points for
5773 a hidden service and we try fetching the service descriptor again:
5774 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
5777 - Fix a major load balance bug: we were round-robining in 16 KB
5778 chunks, and servers with bandwidthrate of 20 KB, while downloading
5779 a 600 KB directory, would starve their other connections. Now we
5780 try to be a bit more fair.
5781 - Dir authorities and mirrors were never expiring the newest
5782 descriptor for each server, causing memory and directory bloat.
5783 - Fix memory-bloating and connection-bloating bug on servers: We
5784 were never closing any connection that had ever had a circuit on
5785 it, because we were checking conn->n_circuits == 0, yet we had a
5786 bug that let it go negative.
5787 - Make Tor work using squid as your http proxy again -- squid
5788 returns an error if you ask for a URL that's too long, and it uses
5789 a really generic error message. Plus, many people are behind a
5790 transparent squid so they don't even realize it.
5791 - On platforms that don't have getrlimit (like Windows), we were
5792 artificially constraining ourselves to a max of 1024
5793 connections. Now just assume that we can handle as many as 15000
5794 connections. Hopefully this won't cause other problems.
5795 - Add a new config option ExitPolicyRejectPrivate which defaults to
5796 1. This means all exit policies will begin with rejecting private
5797 addresses, unless the server operator explicitly turns it off.
5800 - Clients no longer download descriptors for non-running
5802 - Before we add new directory authorities, we should make it
5803 clear that only v1 authorities should receive/publish hidden
5804 service descriptors.
5807 - As soon as we've fetched some more directory info, immediately
5808 try to download more server descriptors. This way we don't have
5809 a 10 second pause during initial bootstrapping.
5810 - Remove even more loud log messages that the server operator can't
5812 - When we're running an obsolete or un-recommended version, make
5813 the log message more clear about what the problem is and what
5814 versions *are* still recommended.
5815 - Provide a more useful warn message when our onion queue gets full:
5816 the CPU is too slow or the exit policy is too liberal.
5817 - Don't warn when we receive a 503 from a dirserver/cache -- this
5818 will pave the way for them being able to refuse if they're busy.
5819 - When we fail to bind a listener, try to provide a more useful
5820 log message: e.g., "Is Tor already running?"
5821 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
5822 Goldberg can prove things about our handshake protocol more
5824 - MaxConn has been obsolete for a while now. Document the ConnLimit
5825 config option, which is a *minimum* number of file descriptors
5826 that must be available else Tor refuses to start.
5827 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
5828 if you log to syslog and want something other than LOG_DAEMON.
5829 - Make dirservers generate a separate "guard" flag to mean,
5830 "would make a good entry guard". Make clients parse it and vote
5831 on it. Not used by clients yet.
5832 - Implement --with-libevent-dir option to ./configure. Also, improve
5833 search techniques to find libevent, and use those for openssl too.
5834 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
5835 - Only start testing reachability once we've established a
5836 circuit. This will make startup on dirservers less noisy.
5837 - Don't try to upload hidden service descriptors until we have
5838 established a circuit.
5839 - Fix the controller's "attachstream 0" command to treat conn like
5840 it just connected, doing address remapping, handling .exit and
5841 .onion idioms, and so on. Now we're more uniform in making sure
5842 that the controller hears about new and closing connections.
5845 Changes in version 0.1.1.12-alpha - 2006-01-11
5846 o Bugfixes on 0.1.1.x:
5847 - The fix to close duplicate server connections was closing all
5848 Tor client connections if they didn't establish a circuit
5849 quickly enough. Oops.
5850 - Fix minor memory issue (double-free) that happened on exit.
5852 o Bugfixes on 0.1.0.x:
5853 - Tor didn't warn when it failed to open a log file.
5856 Changes in version 0.1.1.11-alpha - 2006-01-10
5857 o Crashes in 0.1.1.x:
5858 - Include all the assert/crash fixes from 0.1.0.16.
5859 - If you start Tor and then quit very quickly, there were some
5860 races that tried to free things that weren't allocated yet.
5861 - Fix a rare memory stomp if you're running hidden services.
5862 - Fix segfault when specifying DirServer in config without nickname.
5863 - Fix a seg fault when you finish connecting to a server but at
5864 that moment you dump his server descriptor.
5865 - Extendcircuit and Attachstream controller commands would
5866 assert/crash if you don't give them enough arguments.
5867 - Fix an assert error when we're out of space in the connection_list
5868 and we try to post a hidden service descriptor (reported by weasel).
5869 - If you specify a relative torrc path and you set RunAsDaemon in
5870 your torrc, then it chdir()'s to the new directory. If you HUP,
5871 it tries to load the new torrc location, fails, and exits.
5872 The fix: no longer allow a relative path to torrc using -f.
5875 - Implement "entry guards": automatically choose a handful of entry
5876 nodes and stick with them for all circuits. Only pick new guards
5877 when the ones you have are unsuitable, and if the old guards
5878 become suitable again, switch back. This will increase security
5879 dramatically against certain end-point attacks. The EntryNodes
5880 config option now provides some hints about which entry guards you
5881 want to use most; and StrictEntryNodes means to only use those.
5882 - New directory logic: download by descriptor digest, not by
5883 fingerprint. Caches try to download all listed digests from
5884 authorities; clients try to download "best" digests from caches.
5885 This avoids partitioning and isolating attacks better.
5886 - Make the "stable" router flag in network-status be the median of
5887 the uptimes of running valid servers, and make clients pay
5888 attention to the network-status flags. Thus the cutoff adapts
5889 to the stability of the network as a whole, making IRC, IM, etc
5890 connections more reliable.
5893 - Tor servers with dynamic IP addresses were needing to wait 18
5894 hours before they could start doing reachability testing using
5895 the new IP address and ports. This is because they were using
5896 the internal descriptor to learn what to test, yet they were only
5897 rebuilding the descriptor once they decided they were reachable.
5898 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
5899 to download certain server descriptors, throw them away, and then
5900 fetch them again after 30 minutes. Now mirrors throw away these
5901 server descriptors so clients can't get them.
5902 - We were leaving duplicate connections to other ORs open for a week,
5903 rather than closing them once we detect a duplicate. This only
5904 really affected authdirservers, but it affected them a lot.
5905 - Spread the authdirservers' reachability testing over the entire
5906 testing interval, so we don't try to do 500 TLS's at once every
5910 - If the network is down, and we try to connect to a conn because
5911 we have a circuit in mind, and we timeout (30 seconds) because the
5912 network never answers, we were expiring the circuit, but we weren't
5913 obsoleting the connection or telling the entry_guards functions.
5914 - Some Tor servers process billions of cells per day. These statistics
5915 need to be uint64_t's.
5916 - Check for integer overflows in more places, when adding elements
5917 to smartlists. This could possibly prevent a buffer overflow
5918 on malicious huge inputs. I don't see any, but I haven't looked
5920 - ReachableAddresses kept growing new "reject *:*" lines on every
5922 - When you "setconf log" via the controller, it should remove all
5923 logs. We were automatically adding back in a "log notice stdout".
5924 - Newly bootstrapped Tor networks couldn't establish hidden service
5925 circuits until they had nodes with high uptime. Be more tolerant.
5926 - We were marking servers down when they could not answer every piece
5927 of the directory request we sent them. This was far too harsh.
5928 - Fix the torify (tsocks) config file to not use Tor for localhost
5930 - Directory authorities now go to the proper authority when asking for
5931 a networkstatus, even when they want a compressed one.
5932 - Fix a harmless bug that was causing Tor servers to log
5933 "Got an end because of misc error, but we're not an AP. Closing."
5934 - Authorities were treating their own descriptor changes as cosmetic,
5935 meaning the descriptor available in the network-status and the
5936 descriptor that clients downloaded were different.
5937 - The OS X installer was adding a symlink for tor_resolve but
5938 the binary was called tor-resolve (reported by Thomas Hardly).
5939 - Workaround a problem with some http proxies where they refuse GET
5940 requests that specify "Content-Length: 0" (reported by Adrian).
5941 - Fix wrong log message when you add a "HiddenServiceNodes" config
5942 line without any HiddenServiceDir line (reported by Chris Thomas).
5945 - Write the TorVersion into the state file so we have a prayer of
5946 keeping forward and backward compatibility.
5947 - Revive the FascistFirewall config option rather than eliminating it:
5948 now it's a synonym for ReachableAddresses *:80,*:443.
5949 - Clients choose directory servers from the network status lists,
5950 not from their internal list of router descriptors. Now they can
5951 go to caches directly rather than needing to go to authorities
5953 - Directory authorities ignore router descriptors that have only
5954 cosmetic differences: do this for 0.1.0.x servers now too.
5955 - Add a new flag to network-status indicating whether the server
5956 can answer v2 directory requests too.
5957 - Authdirs now stop whining so loudly about bad descriptors that
5958 they fetch from other dirservers. So when there's a log complaint,
5959 it's for sure from a freshly uploaded descriptor.
5960 - Reduce memory requirements in our structs by changing the order
5962 - There used to be two ways to specify your listening ports in a
5963 server descriptor: on the "router" line and with a separate "ports"
5964 line. Remove support for the "ports" line.
5965 - New config option "AuthDirRejectUnlisted" for auth dirservers as
5966 a panic button: if we get flooded with unusable servers we can
5967 revert to only listing servers in the approved-routers file.
5968 - Auth dir servers can now mark a fingerprint as "!reject" or
5969 "!invalid" in the approved-routers file (as its nickname), to
5970 refuse descriptors outright or include them but marked as invalid.
5971 - Servers store bandwidth history across restarts/crashes.
5972 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
5973 get a better idea of why their circuits failed. Not used yet.
5974 - Directory mirrors now cache up to 16 unrecognized network-status
5975 docs. Now we can add new authdirservers and they'll be cached too.
5976 - When picking a random directory, prefer non-authorities if any
5978 - New controller option "getinfo desc/all-recent" to fetch the
5979 latest server descriptor for every router that Tor knows about.
5982 Changes in version 0.1.0.16 - 2006-01-02
5983 o Crash bugfixes on 0.1.0.x:
5984 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5985 corrupting the heap, losing FDs, or crashing when we need to resize
5986 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5987 - It turns out sparc64 platforms crash on unaligned memory access
5988 too -- so detect and avoid this.
5989 - Handle truncated compressed data correctly (by detecting it and
5991 - Fix possible-but-unlikely free(NULL) in control.c.
5992 - When we were closing connections, there was a rare case that
5993 stomped on memory, triggering seg faults and asserts.
5994 - Avoid potential infinite recursion when building a descriptor. (We
5995 don't know that it ever happened, but better to fix it anyway.)
5996 - We were neglecting to unlink marked circuits from soon-to-close OR
5997 connections, which caused some rare scribbling on freed memory.
5998 - Fix a memory stomping race bug when closing the joining point of two
5999 rendezvous circuits.
6000 - Fix an assert in time parsing found by Steven Murdoch.
6002 o Other bugfixes on 0.1.0.x:
6003 - When we're doing reachability testing, provide more useful log
6004 messages so the operator knows what to expect.
6005 - Do not check whether DirPort is reachable when we are suppressing
6006 advertising it because of hibernation.
6007 - When building with -static or on Solaris, we sometimes needed -ldl.
6008 - When we're deciding whether a stream has enough circuits around
6009 that can handle it, count the freshly dirty ones and not the ones
6010 that are so dirty they won't be able to handle it.
6011 - When we're expiring old circuits, we had a logic error that caused
6012 us to close new rendezvous circuits rather than old ones.
6013 - Give a more helpful log message when you try to change ORPort via
6014 the controller: you should upgrade Tor if you want that to work.
6015 - We were failing to parse Tor versions that start with "Tor ".
6016 - Tolerate faulty streams better: when a stream fails for reason
6017 exitpolicy, stop assuming that the router is lying about his exit
6018 policy. When a stream fails for reason misc, allow it to retry just
6019 as if it was resolvefailed. When a stream has failed three times,
6020 reset its failure count so we can try again and get all three tries.
6023 Changes in version 0.1.1.10-alpha - 2005-12-11
6024 o Correctness bugfixes on 0.1.0.x:
6025 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
6026 corrupting the heap, losing FDs, or crashing when we need to resize
6027 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
6028 - Stop doing the complex voodoo overkill checking for insecure
6029 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
6030 - When we were closing connections, there was a rare case that
6031 stomped on memory, triggering seg faults and asserts.
6032 - We were neglecting to unlink marked circuits from soon-to-close OR
6033 connections, which caused some rare scribbling on freed memory.
6034 - When we're deciding whether a stream has enough circuits around
6035 that can handle it, count the freshly dirty ones and not the ones
6036 that are so dirty they won't be able to handle it.
6037 - Recover better from TCP connections to Tor servers that are
6038 broken but don't tell you (it happens!); and rotate TLS
6039 connections once a week.
6040 - When we're expiring old circuits, we had a logic error that caused
6041 us to close new rendezvous circuits rather than old ones.
6042 - Fix a scary-looking but apparently harmless bug where circuits
6043 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
6044 servers, and never switch to state CIRCUIT_STATE_OPEN.
6045 - When building with -static or on Solaris, we sometimes needed to
6047 - Give a useful message when people run Tor as the wrong user,
6048 rather than telling them to start chowning random directories.
6049 - We were failing to inform the controller about new .onion streams.
6051 o Security bugfixes on 0.1.0.x:
6052 - Refuse server descriptors if the fingerprint line doesn't match
6053 the included identity key. Tor doesn't care, but other apps (and
6054 humans) might actually be trusting the fingerprint line.
6055 - We used to kill the circuit when we receive a relay command we
6056 don't recognize. Now we just drop it.
6057 - Start obeying our firewall options more rigorously:
6058 . If we can't get to a dirserver directly, try going via Tor.
6059 . Don't ever try to connect (as a client) to a place our
6060 firewall options forbid.
6061 . If we specify a proxy and also firewall options, obey the
6062 firewall options even when we're using the proxy: some proxies
6063 can only proxy to certain destinations.
6064 - Fix a bug found by Lasse Overlier: when we were making internal
6065 circuits (intended to be cannibalized later for rendezvous and
6066 introduction circuits), we were picking them so that they had
6067 useful exit nodes. There was no need for this, and it actually
6068 aids some statistical attacks.
6069 - Start treating internal circuits and exit circuits separately.
6070 It's important to keep them separate because internal circuits
6071 have their last hops picked like middle hops, rather than like
6072 exit hops. So exiting on them will break the user's expectations.
6074 o Bugfixes on 0.1.1.x:
6075 - Take out the mis-feature where we tried to detect IP address
6076 flapping for people with DynDNS, and chose not to upload a new
6077 server descriptor sometimes.
6078 - Try to be compatible with OpenSSL 0.9.6 again.
6079 - Log fix: when the controller is logging about .onion addresses,
6080 sometimes it didn't include the ".onion" part of the address.
6081 - Don't try to modify options->DirServers internally -- if the
6082 user didn't specify any, just add the default ones directly to
6083 the trusted dirserver list. This fixes a bug where people running
6084 controllers would use SETCONF on some totally unrelated config
6085 option, and Tor would start yelling at them about changing their
6087 - Let the controller's redirectstream command specify a port, in
6088 case the controller wants to change that too.
6089 - When we requested a pile of server descriptors, we sometimes
6090 accidentally launched a duplicate request for the first one.
6091 - Bugfix for trackhostexits: write down the fingerprint of the
6092 chosen exit, not its nickname, because the chosen exit might not
6094 - When parsing foo.exit, if foo is unknown, and we are leaving
6095 circuits unattached, set the chosen_exit field and leave the
6096 address empty. This matters because controllers got confused
6098 - Directory authorities no longer try to download server
6099 descriptors that they know they will reject.
6101 o Features and updates:
6102 - Replace balanced trees with hash tables: this should make stuff
6103 significantly faster.
6104 - Resume using the AES counter-mode implementation that we ship,
6105 rather than OpenSSL's. Ours is significantly faster.
6106 - Many other CPU and memory improvements.
6107 - Add a new config option FastFirstHopPK (on by default) so clients
6108 do a trivial crypto handshake for their first hop, since TLS has
6109 already taken care of confidentiality and authentication.
6110 - Add a new config option TestSocks so people can see if their
6111 applications are using socks4, socks4a, socks5-with-ip, or
6112 socks5-with-hostname. This way they don't have to keep mucking
6113 with tcpdump and wondering if something got cached somewhere.
6114 - Warn when listening on a public address for socks. I suspect a
6115 lot of people are setting themselves up as open socks proxies,
6116 and they have no idea that jerks on the Internet are using them,
6117 since they simply proxy the traffic into the Tor network.
6118 - Add "private:*" as an alias in configuration for policies. Now
6119 you can simplify your exit policy rather than needing to list
6120 every single internal or nonroutable network space.
6121 - Add a new controller event type that allows controllers to get
6122 all server descriptors that were uploaded to a router in its role
6123 as authoritative dirserver.
6124 - Start shipping socks-extensions.txt, tor-doc-unix.html,
6125 tor-doc-server.html, and stylesheet.css in the tarball.
6126 - Stop shipping tor-doc.html in the tarball.
6129 Changes in version 0.1.1.9-alpha - 2005-11-15
6130 o Usability improvements:
6131 - Start calling it FooListenAddress rather than FooBindAddress,
6132 since few of our users know what it means to bind an address
6134 - Reduce clutter in server logs. We're going to try to make
6135 them actually usable now. New config option ProtocolWarnings that
6136 lets you hear about how _other Tors_ are breaking the protocol. Off
6138 - Divide log messages into logging domains. Once we put some sort
6139 of interface on this, it will let people looking at more verbose
6140 log levels specify the topics they want to hear more about.
6141 - Make directory servers return better http 404 error messages
6142 instead of a generic "Servers unavailable".
6143 - Check for even more Windows version flags when writing the platform
6144 string in server descriptors, and note any we don't recognize.
6145 - Clean up more of the OpenSSL memory when exiting, so we can detect
6146 memory leaks better.
6147 - Make directory authorities be non-versioning, non-naming by
6148 default. Now we can add new directory servers without requiring
6149 their operators to pay close attention.
6150 - When logging via syslog, include the pid whenever we provide
6151 a log entry. Suggested by Todd Fries.
6153 o Performance improvements:
6154 - Directory servers now silently throw away new descriptors that
6155 haven't changed much if the timestamps are similar. We do this to
6156 tolerate older Tor servers that upload a new descriptor every 15
6157 minutes. (It seemed like a good idea at the time.)
6158 - Inline bottleneck smartlist functions; use fast versions by default.
6159 - Add a "Map from digest to void*" abstraction digestmap_t so we
6160 can do less hex encoding/decoding. Use it in router_get_by_digest()
6161 to resolve a performance bottleneck.
6162 - Allow tor_gzip_uncompress to extract as much as possible from
6163 truncated compressed data. Try to extract as many
6164 descriptors as possible from truncated http responses (when
6165 DIR_PURPOSE_FETCH_ROUTERDESC).
6166 - Make circ->onionskin a pointer, not a static array. moria2 was using
6167 125000 circuit_t's after it had been up for a few weeks, which
6168 translates to 20+ megs of wasted space.
6169 - The private half of our EDH handshake keys are now chosen out
6170 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
6172 o Security improvements:
6173 - Start making directory caches retain old routerinfos, so soon
6174 clients can start asking by digest of descriptor rather than by
6175 fingerprint of server.
6176 - Add half our entropy from RAND_poll in OpenSSL. This knows how
6177 to use egd (if present), openbsd weirdness (if present), vms/os2
6178 weirdness (if we ever port there), and more in the future.
6180 o Bugfixes on 0.1.0.x:
6181 - Do round-robin writes of at most 16 kB per write. This might be
6182 more fair on loaded Tor servers, and it might resolve our Windows
6183 crash bug. It might also slow things down.
6184 - Our TLS handshakes were generating a single public/private
6185 keypair for the TLS context, rather than making a new one for
6186 each new connections. Oops. (But we were still rotating them
6187 periodically, so it's not so bad.)
6188 - When we were cannibalizing a circuit with a particular exit
6189 node in mind, we weren't checking to see if that exit node was
6190 already present earlier in the circuit. Oops.
6191 - When a Tor server's IP changes (e.g. from a dyndns address),
6192 upload a new descriptor so clients will learn too.
6193 - Really busy servers were keeping enough circuits open on stable
6194 connections that they were wrapping around the circuit_id
6195 space. (It's only two bytes.) This exposed a bug where we would
6196 feel free to reuse a circuit_id even if it still exists but has
6197 been marked for close. Try to fix this bug. Some bug remains.
6198 - If we would close a stream early (e.g. it asks for a .exit that
6199 we know would refuse it) but the LeaveStreamsUnattached config
6200 option is set by the controller, then don't close it.
6202 o Bugfixes on 0.1.1.8-alpha:
6203 - Fix a big pile of memory leaks, some of them serious.
6204 - Do not try to download a routerdesc if we would immediately reject
6206 - Resume inserting a newline between all router descriptors when
6207 generating (old style) signed directories, since our spec says
6209 - When providing content-type application/octet-stream for
6210 server descriptors using .z, we were leaving out the
6211 content-encoding header. Oops. (Everything tolerated this just
6212 fine, but that doesn't mean we need to be part of the problem.)
6213 - Fix a potential seg fault in getconf and getinfo using version 1
6214 of the controller protocol.
6215 - Avoid crash: do not check whether DirPort is reachable when we
6216 are suppressing it because of hibernation.
6217 - Make --hash-password not crash on exit.
6220 Changes in version 0.1.1.8-alpha - 2005-10-07
6221 o New features (major):
6222 - Clients don't download or use the directory anymore. Now they
6223 download and use network-statuses from the trusted dirservers,
6224 and fetch individual server descriptors as needed from mirrors.
6225 See dir-spec.txt for all the gory details.
6226 - Be more conservative about whether to advertise our DirPort.
6227 The main change is to not advertise if we're running at capacity
6228 and either a) we could hibernate or b) our capacity is low and
6229 we're using a default DirPort.
6230 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
6232 o New features (minor):
6233 - Try to be smart about when to retry network-status and
6234 server-descriptor fetches. Still needs some tuning.
6235 - Stop parsing, storing, or using running-routers output (but
6236 mirrors still cache and serve it).
6237 - Consider a threshold of versioning dirservers (dirservers who have
6238 an opinion about which Tor versions are still recommended) before
6239 deciding whether to warn the user that he's obsolete.
6240 - Dirservers can now reject/invalidate by key and IP, with the
6241 config options "AuthDirInvalid" and "AuthDirReject". This is
6242 useful since currently we automatically list servers as running
6243 and usable even if we know they're jerks.
6244 - Provide dire warnings to any users who set DirServer; move it out
6245 of torrc.sample and into torrc.complete.
6246 - Add MyFamily to torrc.sample in the server section.
6247 - Add nicknames to the DirServer line, so we can refer to them
6248 without requiring all our users to memorize their IP addresses.
6249 - When we get an EOF or a timeout on a directory connection, note
6250 how many bytes of serverdesc we are dropping. This will help
6251 us determine whether it is smart to parse incomplete serverdesc
6253 - Add a new function to "change pseudonyms" -- that is, to stop
6254 using any currently-dirty circuits for new streams, so we don't
6255 link new actions to old actions. Currently it's only called on
6256 HUP (or SIGNAL RELOAD).
6257 - On sighup, if UseHelperNodes changed to 1, use new circuits.
6258 - Start using RAND_bytes rather than RAND_pseudo_bytes from
6259 OpenSSL. Also, reseed our entropy every hour, not just at
6260 startup. And entropy in 512-bit chunks, not 160-bit chunks.
6262 o Fixes on 0.1.1.7-alpha:
6263 - Nobody ever implemented EVENT_ADDRMAP for control protocol
6264 version 0, so don't let version 0 controllers ask for it.
6265 - If you requested something with too many newlines via the
6266 v1 controller protocol, you could crash tor.
6267 - Fix a number of memory leaks, including some pretty serious ones.
6268 - Re-enable DirPort testing again, so Tor servers will be willing
6269 to advertise their DirPort if it's reachable.
6270 - On TLS handshake, only check the other router's nickname against
6271 its expected nickname if is_named is set.
6273 o Fixes forward-ported from 0.1.0.15:
6274 - Don't crash when we don't have any spare file descriptors and we
6275 try to spawn a dns or cpu worker.
6276 - Make the numbers in read-history and write-history into uint64s,
6277 so they don't overflow and publish negatives in the descriptor.
6280 - For the OS X package's modified privoxy config file, comment
6281 out the "logfile" line so we don't log everything passed
6283 - We were whining about using socks4 or socks5-with-local-lookup
6284 even when it's an IP in the "virtual" range we designed exactly
6286 - We were leaking some memory every time the client changes IPs.
6287 - Never call free() on tor_malloc()d memory. This will help us
6288 use dmalloc to detect memory leaks.
6289 - Check for named servers when looking them up by nickname;
6290 warn when we'recalling a non-named server by its nickname;
6291 don't warn twice about the same name.
6292 - Try to list MyFamily elements by key, not by nickname, and warn
6293 if we've not heard of the server.
6294 - Make windows platform detection (uname equivalent) smarter.
6295 - It turns out sparc64 doesn't like unaligned access either.
6298 Changes in version 0.1.0.15 - 2005-09-23
6299 o Bugfixes on 0.1.0.x:
6300 - Reject ports 465 and 587 (spam targets) in default exit policy.
6301 - Don't crash when we don't have any spare file descriptors and we
6302 try to spawn a dns or cpu worker.
6303 - Get rid of IgnoreVersion undocumented config option, and make us
6304 only warn, never exit, when we're running an obsolete version.
6305 - Don't try to print a null string when your server finds itself to
6306 be unreachable and the Address config option is empty.
6307 - Make the numbers in read-history and write-history into uint64s,
6308 so they don't overflow and publish negatives in the descriptor.
6309 - Fix a minor memory leak in smartlist_string_remove().
6310 - We were only allowing ourselves to upload a server descriptor at
6311 most every 20 minutes, even if it changed earlier than that.
6312 - Clean up log entries that pointed to old URLs.
6315 Changes in version 0.1.1.7-alpha - 2005-09-14
6316 o Fixes on 0.1.1.6-alpha:
6317 - Exit servers were crashing when people asked them to make a
6318 connection to an address not in their exit policy.
6319 - Looking up a non-existent stream for a v1 control connection would
6321 - Fix a seg fault if we ask a dirserver for a descriptor by
6322 fingerprint but he doesn't know about him.
6323 - SETCONF was appending items to linelists, not clearing them.
6324 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
6325 out and refuse the setconf if it would fail.
6326 - Downgrade the dirserver log messages when whining about
6330 - Add Peter Palfrader's check-tor script to tor/contrib/
6331 It lets you easily check whether a given server (referenced by
6332 nickname) is reachable by you.
6333 - Numerous changes to move towards client-side v2 directories. Not
6337 - If the user gave tor an odd number of command-line arguments,
6338 we were silently ignoring the last one. Now we complain and fail.
6339 [This wins the oldest-bug prize -- this bug has been present since
6340 November 2002, as released in Tor 0.0.0.]
6341 - Do not use unaligned memory access on alpha, mips, or mipsel.
6342 It *works*, but is very slow, so we treat them as if it doesn't.
6343 - Retry directory requests if we fail to get an answer we like
6344 from a given dirserver (we were retrying before, but only if
6345 we fail to connect).
6346 - When writing the RecommendedVersions line, sort them first.
6347 - When the client asked for a rendezvous port that the hidden
6348 service didn't want to provide, we were sending an IP address
6349 back along with the end cell. Fortunately, it was zero. But stop
6351 - Correct "your server is reachable" log entries to indicate that
6352 it was self-testing that told us so.
6355 Changes in version 0.1.1.6-alpha - 2005-09-09
6356 o Fixes on 0.1.1.5-alpha:
6357 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
6358 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
6359 - Fix bug with tor_memmem finding a match at the end of the string.
6360 - Make unit tests run without segfaulting.
6361 - Resolve some solaris x86 compile warnings.
6362 - Handle duplicate lines in approved-routers files without warning.
6363 - Fix bug where as soon as a server refused any requests due to his
6364 exit policy (e.g. when we ask for localhost and he tells us that's
6365 127.0.0.1 and he won't do it), we decided he wasn't obeying his
6366 exit policy using him for any exits.
6367 - Only do openssl hardware accelerator stuff if openssl version is
6370 o New controller features/fixes:
6371 - Add a "RESETCONF" command so you can set config options like
6372 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
6373 a config option in the torrc with no value, then it clears it
6374 entirely (rather than setting it to its default).
6375 - Add a "GETINFO config-file" to tell us where torrc is.
6376 - Avoid sending blank lines when GETINFO replies should be empty.
6377 - Add a QUIT command for the controller (for using it manually).
6378 - Fix a bug in SAVECONF that was adding default dirservers and
6379 other redundant entries to the torrc file.
6381 o Start on the new directory design:
6382 - Generate, publish, cache, serve new network-status format.
6383 - Publish individual descriptors (by fingerprint, by "all", and by
6385 - Publish client and server recommended versions separately.
6386 - Allow tor_gzip_uncompress() to handle multiple concatenated
6387 compressed strings. Serve compressed groups of router
6388 descriptors. The compression logic here could be more
6390 - Distinguish v1 authorities (all currently trusted directories)
6391 from v2 authorities (all trusted directories).
6392 - Change DirServers config line to note which dirs are v1 authorities.
6393 - Add configuration option "V1AuthoritativeDirectory 1" which
6394 moria1, moria2, and tor26 should set.
6395 - Remove option when getting directory cache to see whether they
6396 support running-routers; they all do now. Replace it with one
6397 to see whether caches support v2 stuff.
6400 - Dirservers now do their own external reachability testing of each
6401 Tor server, and only list them as running if they've been found to
6402 be reachable. We also send back warnings to the server's logs if
6403 it uploads a descriptor that we already believe is unreachable.
6404 - Implement exit enclaves: if we know an IP address for the
6405 destination, and there's a running Tor server at that address
6406 which allows exit to the destination, then extend the circuit to
6407 that exit first. This provides end-to-end encryption and end-to-end
6408 authentication. Also, if the user wants a .exit address or enclave,
6409 use 4 hops rather than 3, and cannibalize a general circ for it
6411 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
6412 controller. Also, rotate dns and cpu workers if the controller
6413 changes options that will affect them; and initialize the dns
6414 worker cache tree whether or not we start out as a server.
6415 - Only upload a new server descriptor when options change, 18
6416 hours have passed, uptime is reset, or bandwidth changes a lot.
6417 - Check [X-]Forwarded-For headers in HTTP requests when generating
6418 log messages. This lets people run dirservers (and caches) behind
6419 Apache but still know which IP addresses are causing warnings.
6421 o Config option changes:
6422 - Replace (Fascist)Firewall* config options with a new
6423 ReachableAddresses option that understands address policies.
6424 For example, "ReachableAddresses *:80,*:443"
6425 - Get rid of IgnoreVersion undocumented config option, and make us
6426 only warn, never exit, when we're running an obsolete version.
6427 - Make MonthlyAccountingStart config option truly obsolete now.
6430 - Reject ports 465 and 587 in the default exit policy, since
6431 people have started using them for spam too.
6432 - It turns out we couldn't bootstrap a network since we added
6433 reachability detection in 0.1.0.1-rc. Good thing the Tor network
6434 has never gone down. Add an AssumeReachable config option to let
6435 servers and dirservers bootstrap. When we're trying to build a
6436 high-uptime or high-bandwidth circuit but there aren't enough
6437 suitable servers, try being less picky rather than simply failing.
6438 - Our logic to decide if the OR we connected to was the right guy
6439 was brittle and maybe open to a mitm for unverified routers.
6440 - We weren't cannibalizing circuits correctly for
6441 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
6442 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
6443 build those from scratch. This should make hidden services faster.
6444 - Predict required circuits better, with an eye toward making hidden
6445 services faster on the service end.
6446 - Retry streams if the exit node sends back a 'misc' failure. This
6447 should result in fewer random failures. Also, after failing
6448 from resolve failed or misc, reset the num failures, so we give
6449 it a fair shake next time we try.
6450 - Clean up the rendezvous warn log msgs, and downgrade some to info.
6451 - Reduce severity on logs about dns worker spawning and culling.
6452 - When we're shutting down and we do something like try to post a
6453 server descriptor or rendezvous descriptor, don't complain that
6454 we seem to be unreachable. Of course we are, we're shutting down.
6455 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
6456 We don't use them yet, but maybe one day our DNS resolver will be
6457 able to discover them.
6458 - Make ContactInfo mandatory for authoritative directory servers.
6459 - Require server descriptors to list IPv4 addresses -- hostnames
6460 are no longer allowed. This also fixes some potential security
6461 problems with people providing hostnames as their address and then
6462 preferentially resolving them to partition users.
6463 - Change log line for unreachability to explicitly suggest /etc/hosts
6464 as the culprit. Also make it clearer what IP address and ports we're
6465 testing for reachability.
6466 - Put quotes around user-supplied strings when logging so users are
6467 more likely to realize if they add bad characters (like quotes)
6469 - Let auth dir servers start without specifying an Address config
6471 - Make unit tests (and other invocations that aren't the real Tor)
6472 run without launching listeners, creating subdirectories, and so on.
6475 Changes in version 0.1.1.5-alpha - 2005-08-08
6476 o Bugfixes included in 0.1.0.14.
6478 o Bugfixes on 0.1.0.x:
6479 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
6480 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
6481 it would silently using ignore the 6668.
6484 Changes in version 0.1.0.14 - 2005-08-08
6485 o Bugfixes on 0.1.0.x:
6486 - Fix the other half of the bug with crypto handshakes
6488 - Fix an assert trigger if you send a 'signal term' via the
6489 controller when it's listening for 'event info' messages.
6492 Changes in version 0.1.1.4-alpha - 2005-08-04
6493 o Bugfixes included in 0.1.0.13.
6496 - Improve tor_gettimeofday() granularity on windows.
6497 - Make clients regenerate their keys when their IP address changes.
6498 - Implement some more GETINFO goodness: expose helper nodes, config
6499 options, getinfo keys.
6502 Changes in version 0.1.0.13 - 2005-08-04
6503 o Bugfixes on 0.1.0.x:
6504 - Fix a critical bug in the security of our crypto handshakes.
6505 - Fix a size_t underflow in smartlist_join_strings2() that made
6506 it do bad things when you hand it an empty smartlist.
6507 - Fix Windows installer to ship Tor license (thanks to Aphex for
6508 pointing out this oversight) and put a link to the doc directory
6510 - Explicitly set no-unaligned-access for sparc: it turns out the
6511 new gcc's let you compile broken code, but that doesn't make it
6515 Changes in version 0.1.1.3-alpha - 2005-07-23
6516 o Bugfixes on 0.1.1.2-alpha:
6517 - Fix a bug in handling the controller's "post descriptor"
6519 - Fix several bugs in handling the controller's "extend circuit"
6521 - Fix a bug in handling the controller's "stream status" event.
6522 - Fix an assert failure if we have a controller listening for
6523 circuit events and we go offline.
6524 - Re-allow hidden service descriptors to publish 0 intro points.
6525 - Fix a crash when generating your hidden service descriptor if
6526 you don't have enough intro points already.
6528 o New features on 0.1.1.2-alpha:
6529 - New controller function "getinfo accounting", to ask how
6530 many bytes we've used in this time period.
6531 - Experimental support for helper nodes: a lot of the risk from
6532 a small static adversary comes because users pick new random
6533 nodes every time they rebuild a circuit. Now users will try to
6534 stick to the same small set of entry nodes if they can. Not
6535 enabled by default yet.
6537 o Bugfixes on 0.1.0.12:
6538 - If you're an auth dir server, always publish your dirport,
6539 even if you haven't yet found yourself to be reachable.
6540 - Fix a size_t underflow in smartlist_join_strings2() that made
6541 it do bad things when you hand it an empty smartlist.
6544 Changes in version 0.1.0.12 - 2005-07-18
6545 o New directory servers:
6546 - tor26 has changed IP address.
6548 o Bugfixes on 0.1.0.x:
6549 - Fix a possible double-free in tor_gzip_uncompress().
6550 - When --disable-threads is set, do not search for or link against
6552 - Don't trigger an assert if an authoritative directory server
6553 claims its dirport is 0.
6554 - Fix bug with removing Tor as an NT service: some people were
6555 getting "The service did not return an error." Thanks to Matt
6559 Changes in version 0.1.1.2-alpha - 2005-07-15
6560 o New directory servers:
6561 - tor26 has changed IP address.
6563 o Bugfixes on 0.1.0.x, crashes/leaks:
6564 - Port the servers-not-obeying-their-exit-policies fix from
6566 - Fix an fd leak in start_daemon().
6567 - On Windows, you can't always reopen a port right after you've
6568 closed it. So change retry_listeners() to only close and re-open
6569 ports that have changed.
6570 - Fix a possible double-free in tor_gzip_uncompress().
6572 o Bugfixes on 0.1.0.x, usability:
6573 - When tor_socketpair() fails in Windows, give a reasonable
6574 Windows-style errno back.
6575 - Let people type "tor --install" as well as "tor -install" when
6577 want to make it an NT service.
6578 - NT service patch from Matt Edman to improve error messages.
6579 - When the controller asks for a config option with an abbreviated
6580 name, give the full name in our response.
6581 - Correct the man page entry on TrackHostExitsExpire.
6582 - Looks like we were never delivering deflated (i.e. compressed)
6583 running-routers lists, even when asked. Oops.
6584 - When --disable-threads is set, do not search for or link against
6587 o Bugfixes on 0.1.1.x:
6588 - Fix a seg fault with autodetecting which controller version is
6592 - New hidden service descriptor format: put a version in it, and
6593 let people specify introduction/rendezvous points that aren't
6594 in "the directory" (which is subjective anyway).
6595 - Allow the DEBUG controller event to work again. Mark certain log
6596 entries as "don't tell this to controllers", so we avoid cycles.
6599 Changes in version 0.1.0.11 - 2005-06-30
6600 o Bugfixes on 0.1.0.x:
6601 - Fix major security bug: servers were disregarding their
6602 exit policies if clients behaved unexpectedly.
6603 - Make OS X init script check for missing argument, so we don't
6604 confuse users who invoke it incorrectly.
6605 - Fix a seg fault in "tor --hash-password foo".
6606 - The MAPADDRESS control command was broken.
6609 Changes in version 0.1.1.1-alpha - 2005-06-29
6611 - Make OS X init script check for missing argument, so we don't
6612 confuse users who invoke it incorrectly.
6613 - Fix a seg fault in "tor --hash-password foo".
6614 - Fix a possible way to DoS dirservers.
6615 - When we complain that your exit policy implicitly allows local or
6616 private address spaces, name them explicitly so operators can
6618 - Make the log message less scary when all the dirservers are
6619 temporarily unreachable.
6620 - We were printing the number of idle dns workers incorrectly when
6624 - Revised controller protocol (version 1) that uses ascii rather
6625 than binary. Add supporting libraries in python and java so you
6626 can use the controller from your applications without caring how
6628 - Spiffy new support for crypto hardware accelerators. Can somebody
6632 Changes in version 0.0.9.10 - 2005-06-16
6633 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
6634 - Refuse relay cells that claim to have a length larger than the
6635 maximum allowed. This prevents a potential attack that could read
6636 arbitrary memory (e.g. keys) from an exit server's process
6640 Changes in version 0.1.0.10 - 2005-06-14
6641 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
6642 libevent before 1.1a.
6645 Changes in version 0.1.0.9-rc - 2005-06-09
6647 - Reset buf->highwater every time buf_shrink() is called, not just on
6648 a successful shrink. This was causing significant memory bloat.
6649 - Fix buffer overflow when checking hashed passwords.
6650 - Security fix: if seeding the RNG on Win32 fails, quit.
6651 - Allow seeding the RNG on Win32 even when you're not running as
6653 - Disable threading on Solaris too. Something is wonky with it,
6654 cpuworkers, and reentrant libs.
6655 - Reenable the part of the code that tries to flush as soon as an
6656 OR outbuf has a full TLS record available. Perhaps this will make
6657 OR outbufs not grow as huge except in rare cases, thus saving lots
6658 of CPU time plus memory.
6659 - Reject malformed .onion addresses rather then passing them on as
6660 normal web requests.
6661 - Adapt patch from Adam Langley: fix possible memory leak in
6662 tor_lookup_hostname().
6663 - Initialize libevent later in the startup process, so the logs are
6664 already established by the time we start logging libevent warns.
6665 - Use correct errno on win32 if libevent fails.
6666 - Check and warn about known-bad/slow libevent versions.
6667 - Pay more attention to the ClientOnly config option.
6668 - Have torctl.in/tor.sh.in check for location of su binary (needed
6670 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
6671 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
6672 HttpProxyAuthenticator
6673 - Stop warning about sigpipes in the logs. We're going to
6674 pretend that getting these occassionally is normal and fine.
6675 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
6677 installer screens; and don't put stuff into StartupItems unless
6678 the user asks you to.
6679 - Require servers that use the default dirservers to have public IP
6680 addresses. We have too many servers that are configured with private
6681 IPs and their admins never notice the log entries complaining that
6682 their descriptors are being rejected.
6683 - Add OSX uninstall instructions. An actual uninstall script will
6687 Changes in version 0.1.0.8-rc - 2005-05-23
6689 - It turns out that kqueue on OS X 10.3.9 was causing kernel
6690 panics. Disable kqueue on all OS X Tors.
6691 - Fix RPM: remove duplicate line accidentally added to the rpm
6693 - Disable threads on openbsd too, since its gethostaddr is not
6695 - Tolerate libevent 0.8 since it still works, even though it's
6697 - Enable building on Red Hat 9.0 again.
6698 - Allow the middle hop of the testing circuit to be running any
6699 version, now that most of them have the bugfix to let them connect
6700 to unknown servers. This will allow reachability testing to work
6701 even when 0.0.9.7-0.0.9.9 become obsolete.
6702 - Handle relay cells with rh.length too large. This prevents
6703 a potential attack that could read arbitrary memory (maybe even
6704 keys) from the exit server's process.
6705 - We screwed up the dirport reachability testing when we don't yet
6706 have a cached version of the directory. Hopefully now fixed.
6707 - Clean up router_load_single_router() (used by the controller),
6708 so it doesn't seg fault on error.
6709 - Fix a minor memory leak when somebody establishes an introduction
6710 point at your Tor server.
6711 - If a socks connection ends because read fails, don't warn that
6712 you're not sending a socks reply back.
6715 - Add HttpProxyAuthenticator config option too, that works like
6716 the HttpsProxyAuthenticator config option.
6717 - Encode hashed controller passwords in hex instead of base64,
6718 to make it easier to write controllers.
6721 Changes in version 0.1.0.7-rc - 2005-05-17
6723 - Fix a bug in the OS X package installer that prevented it from
6724 installing on Tiger.
6725 - Fix a script bug in the OS X package installer that made it
6726 complain during installation.
6727 - Find libevent even if it's hiding in /usr/local/ and your
6728 CFLAGS and LDFLAGS don't tell you to look there.
6729 - Be able to link with libevent as a shared library (the default
6730 after 1.0d), even if it's hiding in /usr/local/lib and even
6731 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
6732 assuming you're running gcc. Otherwise fail and give a useful
6734 - Fix a bug in the RPM packager: set home directory for _tor to
6735 something more reasonable when first installing.
6736 - Free a minor amount of memory that is still reachable on exit.
6739 Changes in version 0.1.0.6-rc - 2005-05-14
6741 - Implement --disable-threads configure option. Disable threads on
6742 netbsd by default, because it appears to have no reentrant resolver
6744 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
6745 release (1.1) detects and disables kqueue if it's broken.
6746 - Append default exit policy before checking for implicit internal
6747 addresses. Now we don't log a bunch of complaints on startup
6748 when using the default exit policy.
6749 - Some people were putting "Address " in their torrc, and they had
6750 a buggy resolver that resolved " " to 0.0.0.0. Oops.
6751 - If DataDir is ~/.tor, and that expands to /.tor, then default to
6752 LOCALSTATEDIR/tor instead.
6753 - Fix fragmented-message bug in TorControl.py.
6754 - Resolve a minor bug which would prevent unreachable dirports
6755 from getting suppressed in the published descriptor.
6756 - When the controller gave us a new descriptor, we weren't resolving
6757 it immediately, so Tor would think its address was 0.0.0.0 until
6758 we fetched a new directory.
6759 - Fix an uppercase/lowercase case error in suppressing a bogus
6760 libevent warning on some Linuxes.
6763 - Begin scrubbing sensitive strings from logs by default. Turn off
6764 the config option SafeLogging if you need to do debugging.
6765 - Switch to a new buffer management algorithm, which tries to avoid
6766 reallocing and copying quite as much. In first tests it looks like
6767 it uses *more* memory on average, but less cpu.
6768 - First cut at support for "create-fast" cells. Clients can use
6769 these when extending to their first hop, since the TLS already
6770 provides forward secrecy and authentication. Not enabled on
6772 - When dirservers refuse a router descriptor, we now log its
6773 contactinfo, platform, and the poster's IP address.
6774 - Call tor_free_all instead of connections_free_all after forking, to
6775 save memory on systems that need to fork.
6776 - Whine at you if you're a server and you don't set your contactinfo.
6777 - Implement --verify-config command-line option to check if your torrc
6778 is valid without actually launching Tor.
6779 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
6780 rather than just rejecting it.
6783 Changes in version 0.1.0.5-rc - 2005-04-27
6785 - Stop trying to print a null pointer if an OR conn fails because
6786 we didn't like its cert.
6788 - Switch our internal buffers implementation to use a ring buffer,
6789 to hopefully improve performance for fast servers a lot.
6790 - Add HttpsProxyAuthenticator support (basic auth only), based
6791 on patch from Adam Langley.
6792 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
6793 the fast servers that have been joining lately.
6794 - Give hidden service accesses extra time on the first attempt,
6795 since 60 seconds is often only barely enough. This might improve
6797 - Improve performance for dirservers: stop re-parsing the whole
6798 directory every time you regenerate it.
6799 - Add more debugging info to help us find the weird dns freebsd
6800 pthreads bug; cleaner debug messages to help track future issues.
6803 Changes in version 0.0.9.9 - 2005-04-23
6804 o Bugfixes on 0.0.9.x:
6805 - If unofficial Tor clients connect and send weird TLS certs, our
6806 Tor server triggers an assert. This release contains a minimal
6807 backport from the broader fix that we put into 0.1.0.4-rc.
6810 Changes in version 0.1.0.4-rc - 2005-04-23
6812 - If unofficial Tor clients connect and send weird TLS certs, our
6813 Tor server triggers an assert. Stop asserting, and start handling
6814 TLS errors better in other situations too.
6815 - When the controller asks us to tell it about all the debug-level
6816 logs, it turns out we were generating debug-level logs while
6817 telling it about them, which turns into a bad loop. Now keep
6818 track of whether you're sending a debug log to the controller,
6819 and don't log when you are.
6820 - Fix the "postdescriptor" feature of the controller interface: on
6821 non-complete success, only say "done" once.
6823 - Clients are now willing to load balance over up to 2mB, not 1mB,
6824 of advertised bandwidth capacity.
6825 - Add a NoPublish config option, so you can be a server (e.g. for
6826 testing running Tor servers in other Tor networks) without
6827 publishing your descriptor to the primary dirservers.
6830 Changes in version 0.1.0.3-rc - 2005-04-08
6831 o Improvements on 0.1.0.2-rc:
6832 - Client now retries when streams end early for 'hibernating' or
6833 'resource limit' reasons, rather than failing them.
6834 - More automated handling for dirserver operators:
6835 - Automatically approve nodes running 0.1.0.2-rc or later,
6836 now that the the reachability detection stuff is working.
6837 - Now we allow two unverified servers with the same nickname
6838 but different keys. But if a nickname is verified, only that
6839 nickname+key are allowed.
6840 - If you're an authdirserver connecting to an address:port,
6841 and it's not the OR you were expecting, forget about that
6842 descriptor. If he *was* the one you were expecting, then forget
6843 about all other descriptors for that address:port.
6844 - Allow servers to publish descriptors from 12 hours in the future.
6845 Corollary: only whine about clock skew from the dirserver if
6846 he's a trusted dirserver (since now even verified servers could
6847 have quite wrong clocks).
6848 - Adjust maximum skew and age for rendezvous descriptors: let skew
6849 be 48 hours rather than 90 minutes.
6850 - Efficiency improvements:
6851 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
6852 it much faster to look up a circuit for each relay cell.
6853 - Remove most calls to assert_all_pending_dns_resolves_ok(),
6854 since they're eating our cpu on exit nodes.
6855 - Stop wasting time doing a case insensitive comparison for every
6856 dns name every time we do any lookup. Canonicalize the names to
6857 lowercase and be done with it.
6858 - Start sending 'truncated' cells back rather than destroy cells,
6859 if the circuit closes in front of you. This means we won't have
6860 to abandon partially built circuits.
6861 - Only warn once per nickname from add_nickname_list_to_smartlist
6862 per failure, so an entrynode or exitnode choice that's down won't
6864 - Put a note in the torrc about abuse potential with the default
6866 - Revise control spec and implementation to allow all log messages to
6867 be sent to controller with their severities intact (suggested by
6868 Matt Edman). Update TorControl to handle new log event types.
6869 - Provide better explanation messages when controller's POSTDESCRIPTOR
6871 - Stop putting nodename in the Platform string in server descriptors.
6872 It doesn't actually help, and it is confusing/upsetting some people.
6874 o Bugfixes on 0.1.0.2-rc:
6875 - We were printing the host mask wrong in exit policies in server
6876 descriptors. This isn't a critical bug though, since we were still
6877 obeying the exit policy internally.
6878 - Fix Tor when compiled with libevent but without pthreads: move
6879 connection_unregister() from _connection_free() to
6881 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
6882 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
6883 when we look through the connection array, we'll find any of the
6884 cpu/dnsworkers. This is no good.
6886 o Bugfixes on 0.0.9.8:
6887 - Fix possible bug on threading platforms (e.g. win32) which was
6888 leaking a file descriptor whenever a cpuworker or dnsworker died.
6889 - When using preferred entry or exit nodes, ignore whether the
6890 circuit wants uptime or capacity. They asked for the nodes, they
6892 - chdir() to your datadirectory at the *end* of the daemonize process,
6893 not the beginning. This was a problem because the first time you
6894 run tor, if your datadir isn't there, and you have runasdaemon set
6895 to 1, it will try to chdir to it before it tries to create it. Oops.
6896 - Handle changed router status correctly when dirserver reloads
6897 fingerprint file. We used to be dropping all unverified descriptors
6898 right then. The bug was hidden because we would immediately
6899 fetch a directory from another dirserver, which would include the
6900 descriptors we just dropped.
6901 - When we're connecting to an OR and he's got a different nickname/key
6902 than we were expecting, only complain loudly if we're an OP or a
6903 dirserver. Complaining loudly to the OR admins just confuses them.
6904 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
6905 artificially capped at 500kB.
6908 Changes in version 0.0.9.8 - 2005-04-07
6909 o Bugfixes on 0.0.9.x:
6910 - We have a bug that I haven't found yet. Sometimes, very rarely,
6911 cpuworkers get stuck in the 'busy' state, even though the cpuworker
6912 thinks of itself as idle. This meant that no new circuits ever got
6913 established. Here's a workaround to kill any cpuworker that's been
6914 busy for more than 100 seconds.
6917 Changes in version 0.1.0.2-rc - 2005-04-01
6918 o Bugfixes on 0.1.0.1-rc:
6919 - Fixes on reachability detection:
6920 - Don't check for reachability while hibernating.
6921 - If ORPort is reachable but DirPort isn't, still publish the
6922 descriptor, but zero out DirPort until it's found reachable.
6923 - When building testing circs for ORPort testing, use only
6924 high-bandwidth nodes, so fewer circuits fail.
6925 - Complain about unreachable ORPort separately from unreachable
6926 DirPort, so the user knows what's going on.
6927 - Make sure we only conclude ORPort reachability if we didn't
6928 initiate the conn. Otherwise we could falsely conclude that
6929 we're reachable just because we connected to the guy earlier
6930 and he used that same pipe to extend to us.
6931 - Authdirservers shouldn't do ORPort reachability detection,
6932 since they're in clique mode, so it will be rare to find a
6933 server not already connected to them.
6934 - When building testing circuits, always pick middle hops running
6935 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
6936 bug. (This is a kludge; it will go away when 0.0.9.x becomes
6938 - When we decide we're reachable, actually publish our descriptor
6940 - Fix bug in redirectstream in the controller.
6941 - Fix the state descriptor strings so logs don't claim edge streams
6942 are in a different state than they actually are.
6943 - Use recent libevent features when possible (this only really affects
6944 win32 and osx right now, because the new libevent with these
6945 features hasn't been released yet). Add code to suppress spurious
6947 - Prevent possible segfault in connection_close_unattached_ap().
6948 - Fix newlines on torrc in win32.
6949 - Improve error msgs when tor-resolve fails.
6951 o Improvements on 0.0.9.x:
6952 - New experimental script tor/contrib/ExerciseServer.py (needs more
6953 work) that uses the controller interface to build circuits and
6954 fetch pages over them. This will help us bootstrap servers that
6955 have lots of capacity but haven't noticed it yet.
6956 - New experimental script tor/contrib/PathDemo.py (needs more work)
6957 that uses the controller interface to let you choose whole paths
6959 "<hostname>.<path,separated by dots>.<length of path>.path"
6960 - When we've connected to an OR and handshaked but didn't like
6961 the result, we were closing the conn without sending destroy
6962 cells back for pending circuits. Now send those destroys.
6965 Changes in version 0.0.9.7 - 2005-04-01
6966 o Bugfixes on 0.0.9.x:
6967 - Fix another race crash bug (thanks to Glenn Fink for reporting).
6968 - Compare identity to identity, not to nickname, when extending to
6969 a router not already in the directory. This was preventing us from
6970 extending to unknown routers. Oops.
6971 - Make sure to create OS X Tor user in <500 range, so we aren't
6972 creating actual system users.
6973 - Note where connection-that-hasn't-sent-end was marked, and fix
6974 a few really loud instances of this harmless bug (it's fixed more
6978 Changes in version 0.1.0.1-rc - 2005-03-28
6980 - Add reachability testing. Your Tor server will automatically try
6981 to see if its ORPort and DirPort are reachable from the outside,
6982 and it won't upload its descriptor until it decides they are.
6983 - Handle unavailable hidden services better. Handle slow or busy
6984 hidden services better.
6985 - Add support for CONNECTing through https proxies, with "HttpsProxy"
6987 - New exit policy: accept most low-numbered ports, rather than
6988 rejecting most low-numbered ports.
6989 - More Tor controller support (still experimental). See
6990 http://tor.eff.org/doc/control-spec.txt for all the new features,
6991 including signals to emulate unix signals from any platform;
6992 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
6993 closestream; closecircuit; etc.
6994 - Make nt services work and start on startup on win32 (based on
6995 patch by Matt Edman).
6996 - Add a new AddressMap config directive to rewrite incoming socks
6997 addresses. This lets you, for example, declare an implicit
6998 required exit node for certain sites.
6999 - Add a new TrackHostExits config directive to trigger addressmaps
7000 for certain incoming socks addresses -- for sites that break when
7001 your exit keeps changing (based on patch by Mike Perry).
7002 - Redo the client-side dns cache so it's just an addressmap too.
7003 - Notice when our IP changes, and reset stats/uptime/reachability.
7004 - When an application is using socks5, give him the whole variety of
7005 potential socks5 responses (connect refused, host unreachable, etc),
7006 rather than just "success" or "failure".
7007 - A more sane version numbering system. See
7008 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
7009 - New contributed script "exitlist": a simple python script to
7010 parse directories and find Tor nodes that exit to listed
7012 - New contributed script "privoxy-tor-toggle" to toggle whether
7013 Privoxy uses Tor. Seems to be configured for Debian by default.
7014 - Report HTTP reasons to client when getting a response from directory
7015 servers -- so you can actually know what went wrong.
7016 - New config option MaxAdvertisedBandwidth which lets you advertise
7017 a low bandwidthrate (to not attract as many circuits) while still
7018 allowing a higher bandwidthrate in reality.
7020 o Robustness/stability fixes:
7021 - Make Tor use Niels Provos's libevent instead of its current
7022 poll-but-sometimes-select mess. This will let us use faster async
7023 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
7025 - pthread support now too. This was forced because when we forked,
7026 we ended up wasting a lot of duplicate ram over time. Also switch
7027 to foo_r versions of some library calls to allow reentry and
7029 - Better handling for heterogeneous / unreliable nodes:
7030 - Annotate circuits w/ whether they aim to contain high uptime nodes
7031 and/or high capacity nodes. When building circuits, choose
7033 - This means that every single node in an intro rend circuit,
7034 not just the last one, will have a minimum uptime.
7035 - New config option LongLivedPorts to indicate application streams
7036 that will want high uptime circuits.
7037 - Servers reset uptime when a dir fetch entirely fails. This
7038 hopefully reflects stability of the server's network connectivity.
7039 - If somebody starts his tor server in Jan 2004 and then fixes his
7040 clock, don't make his published uptime be a year.
7041 - Reset published uptime when you wake up from hibernation.
7042 - Introduce a notion of 'internal' circs, which are chosen without
7043 regard to the exit policy of the last hop. Intro and rendezvous
7044 circs must be internal circs, to avoid leaking information. Resolve
7045 and connect streams can use internal circs if they want.
7046 - New circuit pooling algorithm: make sure to have enough circs around
7047 to satisfy any predicted ports, and also make sure to have 2 internal
7048 circs around if we've required internal circs lately (and with high
7049 uptime if we've seen that lately too).
7050 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
7051 which describes how often we retry making new circuits if current
7052 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
7053 how long we're willing to make use of an already-dirty circuit.
7054 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
7055 circ as necessary, if there are any completed ones lying around
7056 when we try to launch one.
7057 - Make hidden services try to establish a rendezvous for 30 seconds,
7058 rather than for n (where n=3) attempts to build a circuit.
7059 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
7060 "ShutdownWaitLength".
7061 - Try to be more zealous about calling connection_edge_end when
7062 things go bad with edge conns in connection.c.
7063 - Revise tor-spec to add more/better stream end reasons.
7064 - Revise all calls to connection_edge_end to avoid sending "misc",
7065 and to take errno into account where possible.
7068 - Fix a race condition that can trigger an assert, when we have a
7069 pending create cell and an OR connection fails right then.
7070 - Fix several double-mark-for-close bugs, e.g. where we were finding
7071 a conn for a cell even if that conn is already marked for close.
7072 - Make sequence of log messages when starting on win32 with no config
7073 file more reasonable.
7074 - When choosing an exit node for a new non-internal circ, don't take
7075 into account whether it'll be useful for any pending x.onion
7076 addresses -- it won't.
7077 - Turn addr_policy_compare from a tristate to a quadstate; this should
7078 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
7079 for google.com" problem.
7080 - Make "platform" string in descriptor more accurate for Win32 servers,
7081 so it's not just "unknown platform".
7082 - Fix an edge case in parsing config options (thanks weasel).
7083 If they say "--" on the commandline, it's not an option.
7084 - Reject odd-looking addresses at the client (e.g. addresses that
7085 contain a colon), rather than having the server drop them because
7087 - tor-resolve requests were ignoring .exit if there was a working circuit
7088 they could use instead.
7089 - REUSEADDR on normal platforms means you can rebind to the port
7090 right after somebody else has let it go. But REUSEADDR on win32
7091 means to let you bind to the port _even when somebody else
7092 already has it bound_! So, don't do that on Win32.
7093 - Change version parsing logic: a version is "obsolete" if it is not
7094 recommended and (1) there is a newer recommended version in the
7095 same series, or (2) there are no recommended versions in the same
7096 series, but there are some recommended versions in a newer series.
7097 A version is "new" if it is newer than any recommended version in
7099 - Stop most cases of hanging up on a socks connection without sending
7103 - Require BandwidthRate to be at least 20kB/s for servers.
7104 - When a dirserver causes you to give a warn, mention which dirserver
7106 - New config option DirAllowPrivateAddresses for authdirservers.
7107 Now by default they refuse router descriptors that have non-IP or
7108 private-IP addresses.
7109 - Stop publishing socksport in the directory, since it's not
7110 actually meant to be public. For compatibility, publish a 0 there
7112 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
7113 smart" value, that is low for servers and high for clients.
7114 - If our clock jumps forward by 100 seconds or more, assume something
7115 has gone wrong with our network and abandon all not-yet-used circs.
7116 - Warn when exit policy implicitly allows local addresses.
7117 - If we get an incredibly skewed timestamp from a dirserver mirror
7118 that isn't a verified OR, don't warn -- it's probably him that's
7120 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
7121 cookies to disk and doesn't log each web request to disk. (Thanks
7122 to Brett Carrington for pointing this out.)
7123 - When a client asks us for a dir mirror and we don't have one,
7124 launch an attempt to get a fresh one.
7125 - If we're hibernating and we get a SIGINT, exit immediately.
7126 - Add --with-dmalloc ./configure option, to track memory leaks.
7127 - And try to free all memory on closing, so we can detect what
7129 - Cache local dns resolves correctly even when they're .exit
7131 - Give a better warning when some other server advertises an
7132 ORPort that is actually an apache running ssl.
7133 - Add "opt hibernating 1" to server descriptor to make it clearer
7134 whether the server is hibernating.
7137 Changes in version 0.0.9.6 - 2005-03-24
7138 o Bugfixes on 0.0.9.x (crashes and asserts):
7139 - Add new end stream reasons to maintainance branch. Fix bug where
7140 reason (8) could trigger an assert. Prevent bug from recurring.
7141 - Apparently win32 stat wants paths to not end with a slash.
7142 - Fix assert triggers in assert_cpath_layer_ok(), where we were
7143 blowing away the circuit that conn->cpath_layer points to, then
7144 checking to see if the circ is well-formed. Backport check to make
7145 sure we dont use the cpath on a closed connection.
7146 - Prevent circuit_resume_edge_reading_helper() from trying to package
7147 inbufs for marked-for-close streams.
7148 - Don't crash on hup if your options->address has become unresolvable.
7149 - Some systems (like OS X) sometimes accept() a connection and tell
7150 you the remote host is 0.0.0.0:0. If this happens, due to some
7151 other mis-features, we get confused; so refuse the conn for now.
7153 o Bugfixes on 0.0.9.x (other):
7154 - Fix harmless but scary "Unrecognized content encoding" warn message.
7155 - Add new stream error reason: TORPROTOCOL reason means "you are not
7156 speaking a version of Tor I understand; say bye-bye to your stream."
7157 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
7158 into the future, now that we are more tolerant of skew. This
7159 resolves a bug where a Tor server would refuse to cache a directory
7160 because all the directories it gets are too far in the future;
7161 yet the Tor server never logs any complaints about clock skew.
7162 - Mac packaging magic: make man pages useable, and do not overwrite
7163 existing torrc files.
7164 - Make OS X log happily to /var/log/tor/tor.log
7167 Changes in version 0.0.9.5 - 2005-02-22
7168 o Bugfixes on 0.0.9.x:
7169 - Fix an assert race at exit nodes when resolve requests fail.
7170 - Stop picking unverified dir mirrors--it only leads to misery.
7171 - Patch from Matt Edman to make NT services work better. Service
7172 support is still not compiled into the executable by default.
7173 - Patch from Dmitri Bely so the Tor service runs better under
7174 the win32 SYSTEM account.
7175 - Make tor-resolve actually work (?) on Win32.
7176 - Fix a sign bug when getrlimit claims to have 4+ billion
7177 file descriptors available.
7178 - Stop refusing to start when bandwidthburst == bandwidthrate.
7179 - When create cells have been on the onion queue more than five
7180 seconds, just send back a destroy and take them off the list.
7183 Changes in version 0.0.9.4 - 2005-02-03
7184 o Bugfixes on 0.0.9:
7185 - Fix an assert bug that took down most of our servers: when
7186 a server claims to have 1 GB of bandwidthburst, don't
7188 - Don't crash as badly if we have spawned the max allowed number
7189 of dnsworkers, or we're out of file descriptors.
7190 - Block more file-sharing ports in the default exit policy.
7191 - MaxConn is now automatically set to the hard limit of max
7192 file descriptors we're allowed (ulimit -n), minus a few for
7194 - Give a clearer message when servers need to raise their
7195 ulimit -n when they start running out of file descriptors.
7196 - SGI Compatibility patches from Jan Schaumann.
7197 - Tolerate a corrupt cached directory better.
7198 - When a dirserver hasn't approved your server, list which one.
7199 - Go into soft hibernation after 95% of the bandwidth is used,
7200 not 99%. This is especially important for daily hibernators who
7201 have a small accounting max. Hopefully it will result in fewer
7202 cut connections when the hard hibernation starts.
7203 - Load-balance better when using servers that claim more than
7204 800kB/s of capacity.
7205 - Make NT services work (experimental, only used if compiled in).
7208 Changes in version 0.0.9.3 - 2005-01-21
7209 o Bugfixes on 0.0.9:
7210 - Backport the cpu use fixes from main branch, so busy servers won't
7211 need as much processor time.
7212 - Work better when we go offline and then come back, or when we
7213 run Tor at boot before the network is up. We do this by
7214 optimistically trying to fetch a new directory whenever an
7215 application request comes in and we think we're offline -- the
7216 human is hopefully a good measure of when the network is back.
7217 - Backport some minimal hidserv bugfixes: keep rend circuits open as
7218 long as you keep using them; actually publish hidserv descriptors
7219 shortly after they change, rather than waiting 20-40 minutes.
7220 - Enable Mac startup script by default.
7221 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
7222 - When you update AllowUnverifiedNodes or FirewallPorts via the
7223 controller's setconf feature, we were always appending, never
7225 - When you update HiddenServiceDir via setconf, it was screwing up
7226 the order of reading the lines, making it fail.
7227 - Do not rewrite a cached directory back to the cache; otherwise we
7228 will think it is recent and not fetch a newer one on startup.
7229 - Workaround for webservers that lie about Content-Encoding: Tor
7230 now tries to autodetect compressed directories and compression
7231 itself. This lets us Proxypass dir fetches through apache.
7234 Changes in version 0.0.9.2 - 2005-01-04
7235 o Bugfixes on 0.0.9 (crashes and asserts):
7236 - Fix an assert on startup when the disk is full and you're logging
7238 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
7239 style address, then we'd crash.
7240 - Fix an assert trigger when the running-routers string we get from
7241 a dirserver is broken.
7242 - Make worker threads start and run on win32. Now win32 servers
7244 - Bandaid (not actually fix, but now it doesn't crash) an assert
7245 where the dns worker dies mysteriously and the main Tor process
7246 doesn't remember anything about the address it was resolving.
7248 o Bugfixes on 0.0.9 (Win32):
7249 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
7250 name out of the warning/assert messages.
7251 - Fix a superficial "unhandled error on read" bug on win32.
7252 - The win32 installer no longer requires a click-through for our
7253 license, since our Free Software license grants rights but does not
7255 - Win32: When connecting to a dirserver fails, try another one
7256 immediately. (This was already working for non-win32 Tors.)
7257 - Stop trying to parse $HOME on win32 when hunting for default
7259 - Make tor-resolve.c work on win32 by calling network_init().
7261 o Bugfixes on 0.0.9 (other):
7262 - Make 0.0.9.x build on Solaris again.
7263 - Due to a fencepost error, we were blowing away the \n when reporting
7264 confvalue items in the controller. So asking for multiple config
7265 values at once couldn't work.
7266 - When listing circuits that are pending on an opening OR connection,
7267 if we're an OR we were listing circuits that *end* at us as
7268 being pending on every listener, dns/cpu worker, etc. Stop that.
7269 - Dirservers were failing to create 'running-routers' or 'directory'
7270 strings if we had more than some threshold of routers. Fix them so
7271 they can handle any number of routers.
7272 - Fix a superficial "Duplicate mark for close" bug.
7273 - Stop checking for clock skew for OR connections, even for servers.
7274 - Fix a fencepost error that was chopping off the last letter of any
7275 nickname that is the maximum allowed nickname length.
7276 - Update URLs in log messages so they point to the new website.
7277 - Fix a potential problem in mangling server private keys while
7278 writing to disk (not triggered yet, as far as we know).
7279 - Include the licenses for other free software we include in Tor,
7280 now that we're shipping binary distributions more regularly.
7283 Changes in version 0.0.9.1 - 2004-12-15
7284 o Bugfixes on 0.0.9:
7285 - Make hibernation actually work.
7286 - Make HashedControlPassword config option work.
7287 - When we're reporting event circuit status to a controller,
7288 don't use the stream status code.
7291 Changes in version 0.0.9 - 2004-12-12
7293 - Clean up manpage and torrc.sample file.
7294 - Clean up severities and text of log warnings.
7296 - Make servers trigger an assert when they enter hibernation.
7299 Changes in version 0.0.9rc7 - 2004-12-08
7300 o Bugfixes on 0.0.9rc:
7301 - Fix a stack-trashing crash when an exit node begins hibernating.
7302 - Avoid looking at unallocated memory while considering which
7303 ports we need to build circuits to cover.
7304 - Stop a sigpipe: when an 'end' cell races with eof from the app,
7305 we shouldn't hold-open-until-flush if the eof arrived first.
7306 - Fix a bug with init_cookie_authentication() in the controller.
7307 - When recommending new-format log lines, if the upper bound is
7308 LOG_ERR, leave it implicit.
7310 o Bugfixes on 0.0.8.1:
7311 - Fix a whole slew of memory leaks.
7312 - Fix isspace() and friends so they still make Solaris happy
7313 but also so they don't trigger asserts on win32.
7314 - Fix parse_iso_time on platforms without strptime (eg win32).
7315 - win32: tolerate extra "readable" events better.
7316 - win32: when being multithreaded, leave parent fdarray open.
7317 - Make unit tests work on win32.
7320 Changes in version 0.0.9rc6 - 2004-12-06
7321 o Bugfixes on 0.0.9pre:
7322 - Clean up some more integer underflow opportunities (not exploitable
7324 - While hibernating, hup should not regrow our listeners.
7325 - Send an end to the streams we close when we hibernate, rather
7326 than just chopping them off.
7327 - React to eof immediately on non-open edge connections.
7329 o Bugfixes on 0.0.8.1:
7330 - Calculate timeout for waiting for a connected cell from the time
7331 we sent the begin cell, not from the time the stream started. If
7332 it took a long time to establish the circuit, we would time out
7333 right after sending the begin cell.
7334 - Fix router_compare_addr_to_addr_policy: it was not treating a port
7335 of * as always matching, so we were picking reject *:* nodes as
7336 exit nodes too. Oops.
7339 - New circuit building strategy: keep a list of ports that we've
7340 used in the past 6 hours, and always try to have 2 circuits open
7341 or on the way that will handle each such port. Seed us with port
7342 80 so web users won't complain that Tor is "slow to start up".
7343 - Make kill -USR1 dump more useful stats about circuits.
7344 - When warning about retrying or giving up, print the address, so
7345 the user knows which one it's talking about.
7346 - If you haven't used a clean circuit in an hour, throw it away,
7347 just to be on the safe side. (This means after 6 hours a totally
7348 unused Tor client will have no circuits open.)
7351 Changes in version 0.0.9rc5 - 2004-12-01
7352 o Bugfixes on 0.0.8.1:
7353 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
7354 - Let resolve conns retry/expire also, rather than sticking around
7356 - If we are using select, make sure we stay within FD_SETSIZE.
7358 o Bugfixes on 0.0.9pre:
7359 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
7360 but doesn't seem to be currently; thanks to Ilja van Sprundel for
7362 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
7363 instead. Impose minima and maxima for all *Period options; impose
7364 even tighter maxima for fetching if we are a caching dirserver.
7365 Clip rather than rejecting.
7366 - Fetch cached running-routers from servers that serve it (that is,
7367 authdirservers and servers running 0.0.9rc5-cvs or later.)
7370 - Accept *:706 (silc) in default exit policy.
7371 - Implement new versioning format for post 0.1.
7372 - Support "foo.nickname.exit" addresses, to let Alice request the
7373 address "foo" as viewed by exit node "nickname". Based on a patch
7375 - Make tor --version --version dump the cvs Id of every file.
7378 Changes in version 0.0.9rc4 - 2004-11-28
7379 o Bugfixes on 0.0.8.1:
7380 - Make windows sockets actually non-blocking (oops), and handle
7381 win32 socket errors better.
7383 o Bugfixes on 0.0.9rc1:
7384 - Actually catch the -USR2 signal.
7387 Changes in version 0.0.9rc3 - 2004-11-25
7388 o Bugfixes on 0.0.8.1:
7389 - Flush the log file descriptor after we print "Tor opening log file",
7390 so we don't see those messages days later.
7392 o Bugfixes on 0.0.9rc1:
7393 - Make tor-resolve work again.
7394 - Avoid infinite loop in tor-resolve if tor hangs up on it.
7395 - Fix an assert trigger for clients/servers handling resolves.
7398 Changes in version 0.0.9rc2 - 2004-11-24
7399 o Bugfixes on 0.0.9rc1:
7400 - I broke socks5 support while fixing the eof bug.
7401 - Allow unitless bandwidths and intervals; they default to bytes
7403 - New servers don't start out hibernating; they are active until
7404 they run out of bytes, so they have a better estimate of how
7405 long it takes, and so their operators can know they're working.
7408 Changes in version 0.0.9rc1 - 2004-11-23
7409 o Bugfixes on 0.0.8.1:
7410 - Finally fix a bug that's been plaguing us for a year:
7411 With high load, circuit package window was reaching 0. Whenever
7412 we got a circuit-level sendme, we were reading a lot on each
7413 socket, but only writing out a bit. So we would eventually reach
7414 eof. This would be noticed and acted on even when there were still
7415 bytes sitting in the inbuf.
7416 - When poll() is interrupted, we shouldn't believe the revents values.
7418 o Bugfixes on 0.0.9pre6:
7419 - Fix hibernate bug that caused pre6 to be broken.
7420 - Don't keep rephist info for routers that haven't had activity for
7421 24 hours. (This matters now that clients have keys, since we track
7423 - Never call close_temp_logs while validating log options.
7424 - Fix backslash-escaping on tor.sh.in and torctl.in.
7427 - Implement weekly/monthly/daily accounting: now you specify your
7428 hibernation properties by
7429 AccountingMax N bytes|KB|MB|GB|TB
7430 AccountingStart day|week|month [day] HH:MM
7431 Defaults to "month 1 0:00".
7432 - Let bandwidth and interval config options be specified as 5 bytes,
7433 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
7434 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
7435 get back to normal.)
7436 - If your requested entry or exit node has advertised bandwidth 0,
7438 - Be more greedy about filling up relay cells -- we try reading again
7439 once we've processed the stuff we read, in case enough has arrived
7440 to fill the last cell completely.
7441 - Apply NT service patch from Osamu Fujino. Still needs more work.
7444 Changes in version 0.0.9pre6 - 2004-11-15
7445 o Bugfixes on 0.0.8.1:
7446 - Fix assert failure on malformed socks4a requests.
7447 - Use identity comparison, not nickname comparison, to choose which
7448 half of circuit-ID-space each side gets to use. This is needed
7449 because sometimes we think of a router as a nickname, and sometimes
7450 as a hex ID, and we can't predict what the other side will do.
7451 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
7452 write() call will fail and we handle it there.
7453 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
7454 and smartlist_len, which are two major profiling offenders.
7456 o Bugfixes on 0.0.9pre5:
7457 - Fix a bug in read_all that was corrupting config files on windows.
7458 - When we're raising the max number of open file descriptors to
7459 'unlimited', don't log that we just raised it to '-1'.
7460 - Include event code with events, as required by control-spec.txt.
7461 - Don't give a fingerprint when clients do --list-fingerprint:
7462 it's misleading, because it will never be the same again.
7463 - Stop using strlcpy in tor_strndup, since it was slowing us
7465 - Remove warn on startup about missing cached-directory file.
7466 - Make kill -USR1 work again.
7467 - Hibernate if we start tor during the "wait for wakeup-time" phase
7468 of an accounting interval. Log our hibernation plans better.
7469 - Authoritative dirservers now also cache their directory, so they
7470 have it on start-up.
7473 - Fetch running-routers; cache running-routers; compress
7474 running-routers; serve compressed running-routers.z
7475 - Add NSI installer script contributed by J Doe.
7476 - Commit VC6 and VC7 workspace/project files.
7477 - Commit a tor.spec for making RPM files, with help from jbash.
7478 - Add contrib/torctl.in contributed by Glenn Fink.
7479 - Implement the control-spec's SAVECONF command, to write your
7480 configuration to torrc.
7481 - Get cookie authentication for the controller closer to working.
7482 - Include control-spec.txt in the tarball.
7483 - When set_conf changes our server descriptor, upload a new copy.
7484 But don't upload it too often if there are frequent changes.
7485 - Document authentication config in man page, and document signals
7487 - Clean up confusing parts of man page and torrc.sample.
7488 - Make expand_filename handle ~ and ~username.
7489 - Use autoconf to enable largefile support where necessary. Use
7490 ftello where available, since ftell can fail at 2GB.
7491 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
7492 log more informatively.
7493 - Give a slightly more useful output for "tor -h".
7494 - Refuse application socks connections to port 0.
7495 - Check clock skew for verified servers, but allow unverified
7496 servers and clients to have any clock skew.
7497 - Break DirFetchPostPeriod into:
7498 - DirFetchPeriod for fetching full directory,
7499 - StatusFetchPeriod for fetching running-routers,
7500 - DirPostPeriod for posting server descriptor,
7501 - RendPostPeriod for posting hidden service descriptors.
7502 - Make sure the hidden service descriptors are at a random offset
7503 from each other, to hinder linkability.
7506 Changes in version 0.0.9pre5 - 2004-11-09
7507 o Bugfixes on 0.0.9pre4:
7508 - Fix a seg fault in unit tests (doesn't affect main program).
7509 - Fix an assert bug where a hidden service provider would fail if
7510 the first hop of his rendezvous circuit was down.
7511 - Hidden service operators now correctly handle version 1 style
7512 INTRODUCE1 cells (nobody generates them still, so not a critical
7514 - If do_hup fails, actually notice.
7515 - Handle more errnos from accept() without closing the listener.
7516 Some OpenBSD machines were closing their listeners because
7517 they ran out of file descriptors.
7518 - Send resolve cells to exit routers that are running a new
7519 enough version of the resolve code to work right.
7520 - Better handling of winsock includes on non-MSV win32 compilers.
7521 - Some people had wrapped their tor client/server in a script
7522 that would restart it whenever it died. This did not play well
7523 with our "shut down if your version is obsolete" code. Now people
7524 don't fetch a new directory if their local cached version is
7526 - Make our autogen.sh work on ksh as well as bash.
7529 - Hibernation: New config option "AccountingMaxKB" lets you
7530 set how many KBytes per month you want to allow your server to
7531 consume. Rather than spreading those bytes out evenly over the
7532 month, we instead hibernate for some of the month and pop up
7533 at a deterministic time, work until the bytes are consumed, then
7534 hibernate again. Config option "MonthlyAccountingStart" lets you
7535 specify which day of the month your billing cycle starts on.
7536 - Control interface: a separate program can now talk to your
7537 client/server over a socket, and get/set config options, receive
7538 notifications of circuits and streams starting/finishing/dying,
7539 bandwidth used, etc. The next step is to get some GUIs working.
7540 Let us know if you want to help out. See doc/control-spec.txt .
7541 - Ship a contrib/tor-control.py as an example script to interact
7542 with the control port.
7543 - "tor --hash-password zzyxz" will output a salted password for
7544 use in authenticating to the control interface.
7545 - New log format in config:
7546 "Log minsev[-maxsev] stdout|stderr|syslog" or
7547 "Log minsev[-maxsev] file /var/foo"
7550 - DirPolicy config option, to let people reject incoming addresses
7551 from their dirserver.
7552 - "tor --list-fingerprint" will list your identity key fingerprint
7554 - Add "pass" target for RedirectExit, to make it easier to break
7555 out of a sequence of RedirectExit rules.
7556 - Clients now generate a TLS cert too, in preparation for having
7557 them act more like real nodes.
7558 - Ship src/win32/ in the tarball, so people can use it to build.
7559 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
7561 - New "router-status" line in directory, to better bind each verified
7562 nickname to its identity key.
7563 - Deprecate unofficial config option abbreviations, and abbreviations
7564 not on the command line.
7565 - Add a pure-C tor-resolve implementation.
7566 - Use getrlimit and friends to ensure we can reach MaxConn (currently
7567 1024) file descriptors.
7569 o Code security improvements, inspired by Ilja:
7570 - Replace sprintf with snprintf. (I think they were all safe, but
7572 - Replace strcpy/strncpy with strlcpy in more places.
7573 - Avoid strcat; use snprintf or strlcat instead.
7574 - snprintf wrapper with consistent (though not C99) overflow behavior.
7577 Changes in version 0.0.9pre4 - 2004-10-17
7578 o Bugfixes on 0.0.9pre3:
7579 - If the server doesn't specify an exit policy, use the real default
7580 exit policy, not reject *:*.
7581 - Ignore fascistfirewall when uploading/downloading hidden service
7582 descriptors, since we go through Tor for those; and when using
7583 an HttpProxy, since we assume it can reach them all.
7584 - When looking for an authoritative dirserver, use only the ones
7585 configured at boot. Don't bother looking in the directory.
7586 - The rest of the fix for get_default_conf_file() on older win32.
7587 - Make 'Routerfile' config option obsolete.
7590 - New 'MyFamily nick1,...' config option for a server to
7591 specify other servers that shouldn't be used in the same circuit
7592 with it. Only believed if nick1 also specifies us.
7593 - New 'NodeFamily nick1,nick2,...' config option for a client to
7594 specify nodes that it doesn't want to use in the same circuit.
7595 - New 'Redirectexit pattern address:port' config option for a
7596 server to redirect exit connections, e.g. to a local squid.
7599 Changes in version 0.0.9pre3 - 2004-10-13
7600 o Bugfixes on 0.0.8.1:
7601 - Better torrc example lines for dirbindaddress and orbindaddress.
7602 - Improved bounds checking on parsed ints (e.g. config options and
7603 the ones we find in directories.)
7604 - Better handling of size_t vs int, so we're more robust on 64
7606 - Fix the rest of the bug where a newly started OR would appear
7607 as unverified even after we've added his fingerprint and hupped
7609 - Fix a bug from 0.0.7: when read() failed on a stream, we would
7610 close it without sending back an end. So 'connection refused'
7611 would simply be ignored and the user would get no response.
7613 o Bugfixes on 0.0.9pre2:
7614 - Serving the cached-on-disk directory to people is bad. We now
7615 provide no directory until we've fetched a fresh one.
7616 - Workaround for bug on windows where cached-directories get crlf
7618 - Make get_default_conf_file() work on older windows too.
7619 - If we write a *:* exit policy line in the descriptor, don't write
7620 any more exit policy lines.
7623 - Use only 0.0.9pre1 and later servers for resolve cells.
7624 - Make the dirservers file obsolete.
7625 - Include a dir-signing-key token in directories to tell the
7626 parsing entity which key is being used to sign.
7627 - Remove the built-in bulky default dirservers string.
7628 - New config option "Dirserver %s:%d [fingerprint]", which can be
7629 repeated as many times as needed. If no dirservers specified,
7630 default to moria1,moria2,tor26.
7631 - Make moria2 advertise a dirport of 80, so people behind firewalls
7632 will be able to get a directory.
7633 - Http proxy support
7634 - Dirservers translate requests for http://%s:%d/x to /x
7635 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
7636 be routed through this host.
7637 - Clients ask for /tor/x rather than /x for new enough dirservers.
7638 This way we can one day coexist peacefully with apache.
7639 - Clients specify a "Host: %s%d" http header, to be compatible
7640 with more proxies, and so running squid on an exit node can work.
7643 Changes in version 0.0.8.1 - 2004-10-13
7645 - Fix a seg fault that can be triggered remotely for Tor
7646 clients/servers with an open dirport.
7647 - Fix a rare assert trigger, where routerinfos for entries in
7648 our cpath would expire while we're building the path.
7649 - Fix a bug in OutboundBindAddress so it (hopefully) works.
7650 - Fix a rare seg fault for people running hidden services on
7651 intermittent connections.
7652 - Fix a bug in parsing opt keywords with objects.
7653 - Fix a stale pointer assert bug when a stream detaches and
7655 - Fix a string format vulnerability (probably not exploitable)
7656 in reporting stats locally.
7657 - Fix an assert trigger: sometimes launching circuits can fail
7658 immediately, e.g. because too many circuits have failed recently.
7659 - Fix a compile warning on 64 bit platforms.
7662 Changes in version 0.0.9pre2 - 2004-10-03
7664 - Make fetching a cached directory work for 64-bit platforms too.
7665 - Make zlib.h a required header, not an optional header.
7668 Changes in version 0.0.9pre1 - 2004-10-01
7670 - Stop using separate defaults for no-config-file and
7671 empty-config-file. Now you have to explicitly turn off SocksPort,
7672 if you don't want it open.
7673 - Fix a bug in OutboundBindAddress so it (hopefully) works.
7674 - Improve man page to mention more of the 0.0.8 features.
7675 - Fix a rare seg fault for people running hidden services on
7676 intermittent connections.
7677 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
7679 - Fix more dns related bugs: send back resolve_failed and end cells
7680 more reliably when the resolve fails, rather than closing the
7681 circuit and then trying to send the cell. Also attach dummy resolve
7682 connections to a circuit *before* calling dns_resolve(), to fix
7683 a bug where cached answers would never be sent in RESOLVED cells.
7684 - When we run out of disk space, or other log writing error, don't
7685 crash. Just stop logging to that log and continue.
7686 - We were starting to daemonize before we opened our logs, so if
7687 there were any problems opening logs, we would complain to stderr,
7688 which wouldn't work, and then mysteriously exit.
7689 - Fix a rare bug where sometimes a verified OR would connect to us
7690 before he'd uploaded his descriptor, which would cause us to
7691 assign conn->nickname as though he's unverified. Now we look through
7692 the fingerprint list to see if he's there.
7693 - Fix a rare assert trigger, where routerinfos for entries in
7694 our cpath would expire while we're building the path.
7697 - Clients can ask dirservers for /dir.z to get a compressed version
7698 of the directory. Only works for servers running 0.0.9, of course.
7699 - Make clients cache directories and use them to seed their router
7700 lists at startup. This means clients have a datadir again.
7701 - Configuration infrastructure support for warning on obsolete
7703 - Respond to content-encoding headers by trying to uncompress as
7705 - Reply with a deflated directory when a client asks for "dir.z".
7706 We could use allow-encodings instead, but allow-encodings isn't
7707 specified in HTTP 1.0.
7708 - Raise the max dns workers from 50 to 100.
7709 - Discourage people from setting their dirfetchpostperiod more often
7710 than once per minute.
7711 - Protect dirservers from overzealous descriptor uploading -- wait
7712 10 seconds after directory gets dirty, before regenerating.
7715 Changes in version 0.0.8 - 2004-08-25
7716 o Port it to SunOS 5.9 / Athena
7719 Changes in version 0.0.8rc2 - 2004-08-20
7720 o Make it compile on cygwin again.
7721 o When picking unverified routers, skip those with low uptime and/or
7722 low bandwidth, depending on what properties you care about.
7725 Changes in version 0.0.8rc1 - 2004-08-18
7726 o Changes from 0.0.7.3:
7728 - Fix assert triggers: if the other side returns an address 0.0.0.0,
7729 don't put it into the client dns cache.
7730 - If a begin failed due to exit policy, but we believe the IP address
7731 should have been allowed, switch that router to exitpolicy reject *:*
7732 until we get our next directory.
7734 - Clients choose nodes proportional to advertised bandwidth.
7735 - Avoid using nodes with low uptime as introduction points.
7736 - Handle servers with dynamic IP addresses: don't replace
7737 options->Address with the resolved one at startup, and
7738 detect our address right before we make a routerinfo each time.
7739 - 'FascistFirewall' option to pick dirservers and ORs on specific
7740 ports; plus 'FirewallPorts' config option to tell FascistFirewall
7741 which ports are open. (Defaults to 80,443)
7742 - Be more aggressive about trying to make circuits when the network
7743 has changed (e.g. when you unsuspend your laptop).
7744 - Check for time skew on http headers; report date in response to
7746 - If the entrynode config line has only one node, don't pick it as
7748 - Add strict{entry|exit}nodes config options. If set to 1, then
7749 we refuse to build circuits that don't include the specified entry
7751 - OutboundBindAddress config option, to bind to a specific
7752 IP address for outgoing connect()s.
7753 - End truncated log entries (e.g. directories) with "[truncated]".
7755 o Patches to 0.0.8preX:
7757 - Patches to compile and run on win32 again (maybe)?
7758 - Fix crash when looking for ~/.torrc with no $HOME set.
7759 - Fix a race bug in the unit tests.
7760 - Handle verified/unverified name collisions better when new
7761 routerinfo's arrive in a directory.
7762 - Sometimes routers were getting entered into the stats before
7763 we'd assigned their identity_digest. Oops.
7764 - Only pick and establish intro points after we've gotten a
7767 - AllowUnverifiedNodes config option to let circuits choose no-name
7768 routers in entry,middle,exit,introduction,rendezvous positions.
7769 Allow middle and rendezvous positions by default.
7770 - Add a man page for tor-resolve.
7773 Changes in version 0.0.7.3 - 2004-08-12
7774 o Stop dnsworkers from triggering an assert failure when you
7775 ask them to resolve the host "".
7778 Changes in version 0.0.8pre3 - 2004-08-09
7779 o Changes from 0.0.7.2:
7780 - Allow multiple ORs with same nickname in routerlist -- now when
7781 people give us one identity key for a nickname, then later
7782 another, we don't constantly complain until the first expires.
7783 - Remember used bandwidth (both in and out), and publish 15-minute
7784 snapshots for the past day into our descriptor.
7785 - You can now fetch $DIRURL/running-routers to get just the
7786 running-routers line, not the whole descriptor list. (But
7787 clients don't use this yet.)
7788 - When people mistakenly use Tor as an http proxy, point them
7789 at the tor-doc.html rather than the INSTALL.
7790 - Remove our mostly unused -- and broken -- hex_encode()
7791 function. Use base16_encode() instead. (Thanks to Timo Lindfors
7792 for pointing out this bug.)
7793 - Rotate onion keys every 12 hours, not every 2 hours, so we have
7794 fewer problems with people using the wrong key.
7795 - Change the default exit policy to reject the default edonkey,
7796 kazaa, gnutella ports.
7797 - Add replace_file() to util.[ch] to handle win32's rename().
7799 o Changes from 0.0.8preX:
7800 - Fix two bugs in saving onion keys to disk when rotating, so
7801 hopefully we'll get fewer people using old onion keys.
7802 - Fix an assert error that was making SocksPolicy not work.
7803 - Be willing to expire routers that have an open dirport -- it's
7804 just the authoritative dirservers we want to not forget.
7805 - Reject tor-resolve requests for .onion addresses early, so we
7806 don't build a whole rendezvous circuit and then fail.
7807 - When you're warning a server that he's unverified, don't cry
7809 - Fix a race condition: don't try to extend onto a connection
7810 that's still handshaking.
7811 - For servers in clique mode, require the conn to be open before
7812 you'll choose it for your path.
7813 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
7814 end relay cell, etc.
7815 - Measure bandwidth capacity over the last 24 hours, not just 12
7816 - Bugfix: authoritative dirservers were making and signing a new
7817 directory for each client, rather than reusing the cached one.
7820 Changes in version 0.0.8pre2 - 2004-08-04
7821 o Changes from 0.0.7.2:
7823 - Check directory signature _before_ you decide whether you're
7824 you're running an obsolete version and should exit.
7825 - Check directory signature _before_ you parse the running-routers
7826 list to decide who's running or verified.
7827 - Bugfixes and features:
7828 - Check return value of fclose while writing to disk, so we don't
7829 end up with broken files when servers run out of disk space.
7830 - Log a warning if the user uses an unsafe socks variant, so people
7831 are more likely to learn about privoxy or socat.
7832 - Dirservers now include RFC1123-style dates in the HTTP headers,
7833 which one day we will use to better detect clock skew.
7835 o Changes from 0.0.8pre1:
7836 - Make it compile without warnings again on win32.
7837 - Log a warning if you're running an unverified server, to let you
7838 know you might want to get it verified.
7839 - Only pick a default nickname if you plan to be a server.
7842 Changes in version 0.0.8pre1 - 2004-07-23
7844 - Made our unit tests compile again on OpenBSD 3.5, and tor
7845 itself compile again on OpenBSD on a sparc64.
7846 - We were neglecting milliseconds when logging on win32, so
7847 everything appeared to happen at the beginning of each second.
7850 - 'Extend' relay cell payloads now include the digest of the
7851 intended next hop's identity key. Now we can verify that we're
7852 extending to the right router, and also extend to routers we
7853 hadn't heard of before.
7856 - Tor nodes can now act as relays (with an advertised ORPort)
7857 without being manually verified by the dirserver operators.
7858 - Uploaded descriptors of unverified routers are now accepted
7859 by the dirservers, and included in the directory.
7860 - Verified routers are listed by nickname in the running-routers
7861 list; unverified routers are listed as "$<fingerprint>".
7862 - We now use hash-of-identity-key in most places rather than
7863 nickname or addr:port, for improved security/flexibility.
7864 - To avoid Sybil attacks, paths still use only verified servers.
7865 But now we have a chance to play around with hybrid approaches.
7866 - Nodes track bandwidth usage to estimate capacity (not used yet).
7867 - ClientOnly option for nodes that never want to become servers.
7868 - Directory caching.
7869 - "AuthoritativeDir 1" option for the official dirservers.
7870 - Now other nodes (clients and servers) will cache the latest
7871 directory they've pulled down.
7872 - They can enable their DirPort to serve it to others.
7873 - Clients will pull down a directory from any node with an open
7874 DirPort, and check the signature/timestamp correctly.
7875 - Authoritative dirservers now fetch directories from other
7876 authdirservers, to stay better synced.
7877 - Running-routers list tells who's down also, along with noting
7878 if they're verified (listed by nickname) or unverified (listed
7880 - Allow dirservers to serve running-router list separately.
7881 This isn't used yet.
7882 - ORs connect-on-demand to other ORs
7883 - If you get an extend cell to an OR you're not connected to,
7884 connect, handshake, and forward the create cell.
7885 - The authoritative dirservers stay connected to everybody,
7886 and everybody stays connected to 0.0.7 servers, but otherwise
7887 clients/servers expire unused connections after 5 minutes.
7888 - When servers get a sigint, they delay 30 seconds (refusing new
7889 connections) then exit. A second sigint causes immediate exit.
7890 - File and name management:
7891 - Look for .torrc if no CONFDIR "torrc" is found.
7892 - If no datadir is defined, then choose, make, and secure ~/.tor
7894 - If torrc not found, exitpolicy reject *:*.
7895 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
7896 - If no nickname is defined, derive default from hostname.
7897 - Rename secret key files, e.g. identity.key -> secret_id_key,
7898 to discourage people from mailing their identity key to tor-ops.
7899 - Refuse to build a circuit before the directory has arrived --
7900 it won't work anyway, since you won't know the right onion keys
7902 - Try other dirservers immediately if the one you try is down. This
7903 should tolerate down dirservers better now.
7904 - Parse tor version numbers so we can do an is-newer-than check
7905 rather than an is-in-the-list check.
7906 - New socks command 'resolve', to let us shim gethostbyname()
7908 - A 'tor_resolve' script to access the socks resolve functionality.
7909 - A new socks-extensions.txt doc file to describe our
7910 interpretation and extensions to the socks protocols.
7911 - Add a ContactInfo option, which gets published in descriptor.
7912 - Publish OR uptime in descriptor (and thus in directory) too.
7913 - Write tor version at the top of each log file
7914 - New docs in the tarball:
7916 - Document that you should proxy your SSL traffic too.
7919 Changes in version 0.0.7.2 - 2004-07-07
7920 o A better fix for the 0.0.0.0 problem, that will hopefully
7921 eliminate the remaining related assertion failures.
7924 Changes in version 0.0.7.1 - 2004-07-04
7925 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
7926 since internally we use 0.0.0.0 to signify "not yet resolved".
7929 Changes in version 0.0.7 - 2004-06-07
7930 o Updated the man page to reflect the new features.
7933 Changes in version 0.0.7rc2 - 2004-06-06
7934 o Changes from 0.0.7rc1:
7935 - Make it build on Win32 again.
7936 o Changes from 0.0.6.2:
7937 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
7941 Changes in version 0.0.7rc1 - 2004-06-02
7943 - On sighup, we were adding another log without removing the first
7944 one. So log messages would get duplicated n times for n sighups.
7945 - Several cases of using a connection after we'd freed it. The
7946 problem was that connections that are pending resolve are in both
7947 the pending_resolve tree, and also the circuit's resolving_streams
7948 list. When you want to remove one, you must remove it from both.
7949 - Fix a double-mark-for-close where an end cell arrived for a
7950 resolving stream, and then the resolve failed.
7951 - Check directory signatures based on name of signer, not on whom
7952 we got the directory from. This will let us cache directories more
7955 - Crank up some of our constants to handle more users.
7958 Changes in version 0.0.7pre1 - 2004-06-02
7959 o Fixes for crashes and other obnoxious bugs:
7960 - Fix an epipe bug: sometimes when directory connections failed
7961 to connect, we would give them a chance to flush before closing
7963 - When we detached from a circuit because of resolvefailed, we
7964 would immediately try the same circuit twice more, and then
7965 give up on the resolve thinking we'd tried three different
7967 - Limit the number of intro circuits we'll attempt to build for a
7968 hidden service per 15-minute period.
7969 - Check recommended-software string *early*, before actually parsing
7970 the directory. Thus we can detect an obsolete version and exit,
7971 even if the new directory format doesn't parse.
7972 o Fixes for security bugs:
7973 - Remember which nodes are dirservers when you startup, and if a
7974 random OR enables his dirport, don't automatically assume he's
7975 a trusted dirserver.
7977 - Directory connections were asking the wrong poll socket to
7978 start writing, and not asking themselves to start writing.
7979 - When we detached from a circuit because we sent a begin but
7980 didn't get a connected, we would use it again the first time;
7981 but after that we would correctly switch to a different one.
7982 - Stop warning when the first onion decrypt attempt fails; they
7983 will sometimes legitimately fail now that we rotate keys.
7984 - Override unaligned-access-ok check when $host_cpu is ia64 or
7985 arm. Apparently they allow it but the kernel whines.
7986 - Dirservers try to reconnect periodically too, in case connections
7988 - Fix some memory leaks in directory servers.
7989 - Allow backslash in Win32 filenames.
7990 - Made Tor build complain-free on FreeBSD, hopefully without
7991 breaking other BSD builds. We'll see.
7993 - Doxygen markup on all functions and global variables.
7994 - Make directory functions update routerlist, not replace it. So
7995 now directory disagreements are not so critical a problem.
7996 - Remove the upper limit on number of descriptors in a dirserver's
7997 directory (not that we were anywhere close).
7998 - Allow multiple logfiles at different severity ranges.
7999 - Allow *BindAddress to specify ":port" rather than setting *Port
8000 separately. Allow multiple instances of each BindAddress config
8001 option, so you can bind to multiple interfaces if you want.
8002 - Allow multiple exit policy lines, which are processed in order.
8003 Now we don't need that huge line with all the commas in it.
8004 - Enable accept/reject policies on SOCKS connections, so you can bind
8005 to 0.0.0.0 but still control who can use your OP.
8008 Changes in version 0.0.6.2 - 2004-05-16
8009 o Our integrity-checking digest was checking only the most recent cell,
8010 not the previous cells like we'd thought.
8011 Thanks to Stefan Mark for finding the flaw!
8014 Changes in version 0.0.6.1 - 2004-05-06
8015 o Fix two bugs in our AES counter-mode implementation (this affected
8016 onion-level stream encryption, but not TLS-level). It turns
8017 out we were doing something much more akin to a 16-character
8018 polyalphabetic cipher. Oops.
8019 Thanks to Stefan Mark for finding the flaw!
8020 o Retire moria3 as a directory server, and add tor26 as a directory
8024 Changes in version 0.0.6 - 2004-05-02
8028 Changes in version 0.0.6rc4 - 2004-05-01
8029 o Update the built-in dirservers list to use the new directory format
8030 o Fix a rare seg fault: if a node offering a hidden service attempts
8031 to build a circuit to Alice's rendezvous point and fails before it
8032 reaches the last hop, it retries with a different circuit, but
8034 o Handle windows socket errors correctly.
8037 Changes in version 0.0.6rc3 - 2004-04-28
8038 o Don't expire non-general excess circuits (if we had enough
8039 circuits open, we were expiring rendezvous circuits -- even
8040 when they had a stream attached. oops.)
8041 o Fetch randomness from /dev/urandom better (not via fopen/fread)
8042 o Better debugging for tls errors
8043 o Some versions of openssl have an SSL_pending function that erroneously
8044 returns bytes when there is a non-application record pending.
8045 o Set Content-Type on the directory and hidserv descriptor.
8046 o Remove IVs from cipher code, since AES-ctr has none.
8047 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
8048 o We were using an array of length zero in a few places.
8049 o win32's gethostbyname can't resolve an IP to an IP.
8050 o win32's close can't close a socket.
8053 Changes in version 0.0.6rc2 - 2004-04-26
8054 o Fix a bug where we were closing tls connections intermittently.
8055 It turns out openssl keeps its errors around -- so if an error
8056 happens, and you don't ask about it, and then another openssl
8057 operation happens and succeeds, and you ask if there was an error,
8058 it tells you about the first error. Fun fun.
8059 o Fix a bug that's been lurking since 27 may 03 (!)
8060 When passing back a destroy cell, we would use the wrong circ id.
8061 'Mostly harmless', but still worth fixing.
8062 o Since we don't support truncateds much, don't bother sending them;
8063 just close the circ.
8064 o check for <machine/limits.h> so we build on NetBSD again (I hope).
8065 o don't crash if a conn that sent a begin has suddenly lost its circuit
8066 (this was quite rare).
8069 Changes in version 0.0.6rc1 - 2004-04-25
8070 o We now rotate link (tls context) keys and onion keys.
8071 o CREATE cells now include oaep padding, so you can tell
8072 if you decrypted them correctly.
8073 o Add bandwidthburst to server descriptor.
8074 o Directories now say which dirserver signed them.
8075 o Use a tor_assert macro that logs failed assertions too.
8078 Changes in version 0.0.6pre5 - 2004-04-18
8079 o changes from 0.0.6pre4:
8080 - make tor build on broken freebsd 5.2 installs
8081 - fix a failed assert when you try an intro point, get a nack, and try
8082 a second one and it works.
8083 - when alice uses a port that the hidden service doesn't accept,
8084 it now sends back an end cell (denied by exit policy). otherwise
8085 alice would just have to wait to time out.
8086 - fix another rare bug: when we had tried all the intro
8087 points for a hidden service, we fetched the descriptor
8088 again, but we left our introcirc thinking it had already
8089 sent an intro, so it kept waiting for a response...
8090 - bugfix: when you sleep your hidden-service laptop, as soon
8091 as it wakes up it tries to upload a service descriptor, but
8092 socketpair fails for some reason (localhost not up yet?).
8093 now we simply give up on that upload, and we'll try again later.
8094 i'd still like to find the bug though.
8095 - if an intro circ waiting for an ack dies before getting one, then
8097 - we were reusing stale service descriptors and refetching usable
8101 Changes in version 0.0.6pre4 - 2004-04-14
8102 o changes from 0.0.6pre3:
8103 - when bob fails to connect to the rendezvous point, and his
8104 circ didn't fail because of the rendezvous point itself, then
8105 he retries a couple of times
8106 - we expire introduction and rendezvous circs more thoroughly
8107 (sometimes they were hanging around forever)
8108 - we expire unattached rendezvous streams that have been around
8109 too long (they were sticking around forever).
8110 - fix a measly fencepost error that was crashing everybody with
8114 Changes in version 0.0.6pre3 - 2004-04-14
8115 o changes from 0.0.6pre2:
8116 - make hup work again
8117 - fix some memory leaks for dirservers
8118 - allow more skew in rendezvous descriptor timestamps, to help
8119 handle people like blanu who don't know what time it is
8120 - normal circs are 3 hops, but some rend/intro circs are 4, if
8121 the initiator doesn't get to choose the last hop
8122 - send acks for introductions, so alice can know whether to try
8124 - bob publishes intro points more correctly
8125 o changes from 0.0.5:
8126 - fix an assert trigger that's been plaguing us since the days
8127 of 0.0.2prexx (thanks weasel!)
8128 - retry stream correctly when we fail to connect because of
8129 exit-policy-reject (should try another) or can't-resolve-address
8130 (also should try another, because dns on random internet servers
8132 - when we hup a dirserver and we've *removed* a server from the
8133 approved-routers list, now we remove that server from the
8134 in-memory directories too
8137 Changes in version 0.0.6pre2 - 2004-04-08
8138 o We fixed our base32 implementation. Now it works on all architectures.
8141 Changes in version 0.0.6pre1 - 2004-04-08
8143 - Hidden services and rendezvous points are implemented. Go to
8144 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
8145 hidden services. (This only works via a socks4a proxy such as
8146 Privoxy, and currently it's quite slow.)
8149 Changes in version 0.0.5 - 2004-03-30
8153 Changes in version 0.0.5rc3 - 2004-03-29
8154 o Install torrc as torrc.sample -- we no longer clobber your
8156 o Re-enable recommendedversion checking (we broke it in rc2, oops)
8157 o Add in a 'notice' log level for things the operator should hear
8158 but that aren't warnings
8161 Changes in version 0.0.5rc2 - 2004-03-29
8162 o Hold socks connection open until reply is flushed (if possible)
8163 o Make exit nodes resolve IPs to IPs immediately, rather than asking
8164 the dns farm to do it.
8165 o Fix c99 aliasing warnings in rephist.c
8166 o Don't include server descriptors that are older than 24 hours in the
8168 o Give socks 'reject' replies their whole 15s to attempt to flush,
8169 rather than seeing the 60s timeout and assuming the flush had failed.
8170 o Clean automake droppings from the cvs repository
8173 Changes in version 0.0.5rc1 - 2004-03-28
8174 o Fix mangled-state bug in directory fetching (was causing sigpipes).
8175 o Only build circuits after we've fetched the directory: clients were
8176 using only the directory servers before they'd fetched a directory.
8177 This also means longer startup time; so it goes.
8178 o Fix an assert trigger where an OP would fail to handshake, and we'd
8179 expect it to have a nickname.
8180 o Work around a tsocks bug: do a socks reject when AP connection dies
8181 early, else tsocks goes into an infinite loop.
8184 Changes in version 0.0.4 - 2004-03-26
8185 o When connecting to a dirserver or OR and the network is down,
8189 Changes in version 0.0.3 - 2004-03-26
8190 o Warn and fail if server chose a nickname with illegal characters
8191 o Port to Solaris and Sparc:
8192 - include missing header fcntl.h
8193 - have autoconf find -lsocket -lnsl automatically
8194 - deal with hardware word alignment
8195 - make uname() work (solaris has a different return convention)
8196 - switch from using signal() to sigaction()
8197 o Preliminary work on reputation system:
8198 - Keep statistics on success/fail of connect attempts; they're published
8199 by kill -USR1 currently.
8200 - Add a RunTesting option to try to learn link state by creating test
8201 circuits, even when SocksPort is off.
8202 - Remove unused open circuits when there are too many.
8205 Changes in version 0.0.2 - 2004-03-19
8206 - Include strlcpy and strlcat for safer string ops
8207 - define INADDR_NONE so we compile (but still not run) on solaris
8210 Changes in version 0.0.2pre27 - 2004-03-14
8212 - Allow internal tor networks (we were rejecting internal IPs,
8213 now we allow them if they're set explicitly).
8214 - And fix a few endian issues.
8217 Changes in version 0.0.2pre26 - 2004-03-14
8219 - If a stream times out after 15s without a connected cell, don't
8220 try that circuit again: try a new one.
8221 - Retry streams at most 4 times. Then give up.
8222 - When a dirserver gets a descriptor from an unknown router, it
8223 logs its fingerprint (so the dirserver operator can choose to
8224 accept it even without mail from the server operator).
8225 - Inform unapproved servers when we reject their descriptors.
8226 - Make tor build on Windows again. It works as a client, who knows
8228 - Clearer instructions in the torrc for how to set up a server.
8229 - Be more efficient about reading fd's when our global token bucket
8230 (used for rate limiting) becomes empty.
8232 - Stop asserting that computers always go forward in time. It's
8234 - When we sent a cell (e.g. destroy) and then marked an OR connection
8235 expired, we might close it before finishing a flush if the other
8236 side isn't reading right then.
8237 - Don't allow dirservers to start if they haven't defined
8239 - We were caching transient dns failures. Oops.
8240 - Prevent servers from publishing an internal IP as their address.
8241 - Address a strcat vulnerability in circuit.c
8244 Changes in version 0.0.2pre25 - 2004-03-04
8246 - Put the OR's IP in its router descriptor, not its fqdn. That way
8247 we'll stop being stalled by gethostbyname for nodes with flaky dns,
8250 - If the user typed in an address that didn't resolve, the server
8254 Changes in version 0.0.2pre24 - 2004-03-03
8256 - Fix an assertion failure in dns.c, where we were trying to dequeue
8257 a pending dns resolve even if it wasn't pending
8258 - Fix a spurious socks5 warning about still trying to write after the
8259 connection is finished.
8260 - Hold certain marked_for_close connections open until they're finished
8261 flushing, rather than losing bytes by closing them too early.
8262 - Correctly report the reason for ending a stream
8263 - Remove some duplicate calls to connection_mark_for_close
8264 - Put switch_id and start_daemon earlier in the boot sequence, so it
8265 will actually try to chdir() to options.DataDirectory
8266 - Make 'make test' exit(1) if a test fails; fix some unit tests
8267 - Make tor fail when you use a config option it doesn't know about,
8268 rather than warn and continue.
8269 - Make --version work
8270 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
8273 Changes in version 0.0.2pre23 - 2004-02-29
8275 - Print a statement when the first circ is finished, so the user
8277 - If a relay cell is unrecognized at the end of the circuit,
8278 send back a destroy. (So attacks to mutate cells are more
8280 - New config option 'excludenodes' to avoid certain nodes for circuits.
8281 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
8282 so you can collect coredumps there.
8284 - Fix a bug in tls flushing where sometimes data got wedged and
8285 didn't flush until more data got sent. Hopefully this bug was
8286 a big factor in the random delays we were seeing.
8287 - Make 'connected' cells include the resolved IP, so the client
8288 dns cache actually gets populated.
8289 - Disallow changing from ORPort=0 to ORPort>0 on hup.
8290 - When we time-out on a stream and detach from the circuit, send an
8291 end cell down it first.
8292 - Only warn about an unknown router (in exitnodes, entrynodes,
8293 excludenodes) after we've fetched a directory.
8296 Changes in version 0.0.2pre22 - 2004-02-26
8298 - Servers publish less revealing uname information in descriptors.
8299 - More memory tracking and assertions, to crash more usefully when
8301 - If the default torrc isn't there, just use some default defaults.
8302 Plus provide an internal dirservers file if they don't have one.
8303 - When the user tries to use Tor as an http proxy, give them an http
8304 501 failure explaining that we're a socks proxy.
8305 - Dump a new router.desc on hup, to help confused people who change
8306 their exit policies and then wonder why router.desc doesn't reflect
8308 - Clean up the generic tor.sh init script that we ship with.
8310 - If the exit stream is pending on the resolve, and a destroy arrives,
8311 then the stream wasn't getting removed from the pending list. I
8312 think this was the one causing recent server crashes.
8313 - Use a more robust poll on OSX 10.3, since their poll is flaky.
8314 - When it couldn't resolve any dirservers, it was useless from then on.
8315 Now it reloads the RouterFile (or default dirservers) if it has no
8317 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
8318 many users don't even *have* a /usr/local/sbin/.
8321 Changes in version 0.0.2pre21 - 2004-02-18
8323 - There's a ChangeLog file that actually reflects the changelog.
8324 - There's a 'torify' wrapper script, with an accompanying
8325 tor-tsocks.conf, that simplifies the process of using tsocks for
8326 tor. It even has a man page.
8327 - The tor binary gets installed to sbin rather than bin now.
8328 - Retry streams where the connected cell hasn't arrived in 15 seconds
8329 - Clean up exit policy handling -- get the default out of the torrc,
8330 so we can update it without forcing each server operator to fix
8332 - Allow imaps and pop3s in default exit policy
8334 - Prevent picking middleman nodes as the last node in the circuit
8337 Changes in version 0.0.2pre20 - 2004-01-30
8339 - We now have a deb package, and it's in debian unstable. Go to
8341 - I've split the TotalBandwidth option into BandwidthRate (how many
8342 bytes per second you want to allow, long-term) and
8343 BandwidthBurst (how many bytes you will allow at once before the cap
8344 kicks in). This better token bucket approach lets you, say, set
8345 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
8346 performance while not exceeding your monthly bandwidth quota.
8347 - Push out a tls record's worth of data once you've got it, rather
8348 than waiting until you've read everything waiting to be read. This
8349 may improve performance by pipelining better. We'll see.
8350 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
8351 from failed circuits (if they haven't been connected yet) and attach
8353 - Expire old streams that haven't managed to connect. Some day we'll
8354 have them reattach to new circuits instead.
8357 - Fix several memory leaks that were causing servers to become bloated
8359 - Fix a few very rare assert triggers. A few more remain.
8360 - Setuid to User _before_ complaining about running as root.
8363 Changes in version 0.0.2pre19 - 2004-01-07
8365 - Fix deadlock condition in dns farm. We were telling a child to die by
8366 closing the parent's file descriptor to him. But newer children were
8367 inheriting the open file descriptor from the parent, and since they
8368 weren't closing it, the socket never closed, so the child never read
8369 eof, so he never knew to exit. Similarly, dns workers were holding
8370 open other sockets, leading to all sorts of chaos.
8371 - New cleaner daemon() code for forking and backgrounding.
8372 - If you log to a file, it now prints an entry at the top of the
8373 logfile so you know it's working.
8374 - The onionskin challenge length was 30 bytes longer than necessary.
8375 - Started to patch up the spec so it's not quite so out of date.
8378 Changes in version 0.0.2pre18 - 2004-01-02
8380 - Fix endian issues with the 'integrity' field in the relay header.
8381 - Fix a potential bug where connections in state
8382 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
8385 Changes in version 0.0.2pre17 - 2003-12-30
8387 - Made --debuglogfile (or any second log file, actually) work.
8388 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
8389 adversary could force us into an infinite loop.
8392 - Each onionskin handshake now includes a hash of the computed key,
8393 to prove the server's identity and help perfect forward secrecy.
8394 - Changed cell size from 256 to 512 bytes (working toward compatibility
8396 - Changed cell length to 2 bytes, and moved it to the relay header.
8397 - Implemented end-to-end integrity checking for the payloads of
8399 - Separated streamid from 'recognized' (otherwise circuits will get
8400 messed up when we try to have streams exit from the middle). We
8401 use the integrity-checking to confirm that a cell is addressed to
8403 - Randomize the initial circid and streamid values, so an adversary who
8404 breaks into a node can't learn how many circuits or streams have
8408 Changes in version 0.0.2pre16 - 2003-12-14
8410 - Fixed a bug that made HUP trigger an assert
8411 - Fixed a bug where a circuit that immediately failed wasn't being
8412 counted as a failed circuit in counting retries.
8415 - Now we close the circuit when we get a truncated cell: otherwise we're
8416 open to an anonymity attack where a bad node in the path truncates
8417 the circuit and then we open streams at him.
8418 - Add port ranges to exit policies
8419 - Add a conservative default exit policy
8420 - Warn if you're running tor as root
8421 - on HUP, retry OR connections and close/rebind listeners
8422 - options.EntryNodes: try these nodes first when picking the first node
8423 - options.ExitNodes: if your best choices happen to include any of
8424 your preferred exit nodes, you choose among just those preferred
8426 - options.ExcludedNodes: nodes that are never picked in path building
8429 Changes in version 0.0.2pre15 - 2003-12-03
8430 o Robustness and bugfixes:
8431 - Sometimes clients would cache incorrect DNS resolves, which would
8432 really screw things up.
8433 - An OP that goes offline would slowly leak all its sockets and stop
8435 - A wide variety of bugfixes in exit node selection, exit policy
8436 handling, and processing pending streams when a new circuit is
8438 - Pick nodes for a path only from those the directory says are up
8439 - Choose randomly from all running dirservers, not always the first one
8440 - Increase allowed http header size for directory fetch.
8441 - Stop writing to stderr (if we're daemonized it will be closed).
8442 - Enable -g always, so cores will be more useful to me.
8443 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
8446 - Wrote a man page. It lists commonly used options.
8449 - Change default loglevel to warn.
8450 - Make PidFile default to null rather than littering in your CWD.
8451 - OnionRouter config option is now obsolete. Instead it just checks
8453 - Moved to a single unified torrc file for both clients and servers.
8456 Changes in version 0.0.2pre14 - 2003-11-29
8457 o Robustness and bugfixes:
8458 - Force the admin to make the DataDirectory himself
8459 - to get ownership/permissions right
8460 - so clients no longer make a DataDirectory and then never use it
8461 - fix bug where a client who was offline for 45 minutes would never
8462 pull down a directory again
8463 - fix (or at least hide really well) the dns assert bug that was
8464 causing server crashes
8465 - warnings and improved robustness wrt clockskew for certs
8466 - use the native daemon(3) to daemonize, when available
8467 - exit if bind() fails
8468 - exit if neither socksport nor orport is defined
8469 - include our own tor_timegm (Win32 doesn't have its own)
8470 - bugfix for win32 with lots of connections
8471 - fix minor bias in PRNG
8472 - make dirserver more robust to corrupt cached directory
8475 - Wrote the design document (woo)
8477 o Circuit building and exit policies:
8478 - Circuits no longer try to use nodes that the directory has told them
8480 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
8481 bitcounts (18.0.0.0/8).
8482 - Make AP connections standby for a circuit if no suitable circuit
8483 exists, rather than failing
8484 - Circuits choose exit node based on addr/port, exit policies, and
8485 which AP connections are standing by
8486 - Bump min pathlen from 2 to 3
8487 - Relay end cells have a payload to describe why the stream ended.
8488 - If the stream failed because of exit policy, try again with a new
8490 - Clients have a dns cache to remember resolved addresses.
8491 - Notice more quickly when we have no working circuits
8494 - APPort is now called SocksPort
8495 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
8497 - RecommendedVersions is now a config variable rather than
8498 hardcoded (for dirservers)
8499 - Reloads config on HUP
8500 - Usage info on -h or --help
8501 - If you set User and Group config vars, it'll setu/gid to them.
8504 Changes in version 0.0.2pre13 - 2003-10-19
8505 o General stability:
8506 - SSL_write no longer fails when it returns WANTWRITE and the number
8507 of bytes in the buf has changed by the next SSL_write call.
8508 - Fix segfault fetching directory when network is down
8509 - Fix a variety of minor memory leaks
8510 - Dirservers reload the fingerprints file on HUP, so I don't have
8511 to take down the network when I approve a new router
8512 - Default server config file has explicit Address line to specify fqdn
8515 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
8516 - Make listener connections not ever alloc bufs
8518 o Autoconf improvements:
8519 - don't clobber an external CFLAGS in ./configure
8520 - Make install now works
8521 - create var/lib/tor on make install
8522 - autocreate a tor.sh initscript to help distribs
8523 - autocreate the torrc and sample-server-torrc with correct paths
8525 o Log files and Daemonizing now work:
8526 - If --DebugLogFile is specified, log to it at -l debug
8527 - If --LogFile is specified, use it instead of commandline
8528 - If --RunAsDaemon is set, tor forks and backgrounds on startup