1 Changes in Version 0.2.1.21 - 20??-??-??
3 - Do not refuse to learn about authority certs and v2 networkstatus
4 documents that are older than the latest consensus. This bug might
5 have degraded client bootstrapping. Bugfix on 0.2.0.10-alpha.
6 Spotted and fixed by xmux.
9 Changes in version 0.2.1.20 - 2009-10-15
11 - Send circuit or stream sendme cells when our window has decreased
12 by 100 cells, not when it has decreased by 101 cells. Bug uncovered
13 by Karsten when testing the "reduce circuit window" performance
14 patch. Bugfix on the 54th commit on Tor -- from July 2002,
15 before the release of Tor 0.0.0. This is the new winner of the
17 - Fix a remotely triggerable memory leak when a consensus document
18 contains more than one signature from the same voter. Bugfix on
20 - Avoid segfault in rare cases when finishing an introduction circuit
21 as a client and finding out that we don't have an introduction key
22 for it. Fixes bug 1073. Reported by Aaron Swartz.
25 - Tor now reads the "circwindow" parameter out of the consensus,
26 and uses that value for its circuit package window rather than the
27 default of 1000 cells. Begins the implementation of proposal 168.
29 o New directory authorities:
30 - Set up urras (run by Jacob Appelbaum) as the seventh v3 directory
32 - Move moria1 and tonga to alternate IP addresses.
35 - Fix a signed/unsigned compile warning in 0.2.1.19.
36 - Fix possible segmentation fault on directory authorities. Bugfix on
38 - Fix an extremely rare infinite recursion bug that could occur if
39 we tried to log a message after shutting down the log subsystem.
40 Found by Matt Edman. Bugfix on 0.2.0.16-alpha.
41 - Fix an obscure bug where hidden services on 64-bit big-endian
42 systems might mis-read the timestamp in v3 introduce cells, and
43 refuse to connect back to the client. Discovered by "rotor".
44 Bugfix on 0.2.1.6-alpha.
45 - We were triggering a CLOCK_SKEW controller status event whenever
46 we connect via the v2 connection protocol to any relay that has
47 a wrong clock. Instead, we should only inform the controller when
48 it's a trusted authority that claims our clock is wrong. Bugfix
49 on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
50 - We were telling the controller about CHECKING_REACHABILITY and
51 REACHABILITY_FAILED status events whenever we launch a testing
52 circuit or notice that one has failed. Instead, only tell the
53 controller when we want to inform the user of overall success or
54 overall failure. Bugfix on 0.1.2.6-alpha. Fixes bug 1075. Reported
56 - Don't warn when we're using a circuit that ends with a node
57 excluded in ExcludeExitNodes, but the circuit is not used to access
58 the outside world. This should help fix bug 1090. Bugfix on
60 - Work around a small memory leak in some versions of OpenSSL that
61 stopped the memory used by the hostname TLS extension from being
65 - Add a "getinfo status/accepted-server-descriptor" controller
66 command, which is the recommended way for controllers to learn
67 whether our server descriptor has been successfully received by at
68 least on directory authority. Un-recommend good-server-descriptor
69 getinfo and status events until we have a better design for them.
72 Changes in version 0.2.1.19 - 2009-07-28
73 Tor 0.2.1.19 fixes a major bug with accessing and providing hidden
74 services on Tor 0.2.1.3-alpha through 0.2.1.18.
77 - Make accessing hidden services on 0.2.1.x work right again.
78 Bugfix on 0.2.1.3-alpha; workaround for bug 1038. Diagnosis and
79 part of patch provided by "optimist".
82 - When a relay/bridge is writing out its identity key fingerprint to
83 the "fingerprint" file and to its logs, write it without spaces. Now
84 it will look like the fingerprints in our bridges documentation,
85 and confuse fewer users.
88 - Relays no longer publish a new server descriptor if they change
89 their MaxAdvertisedBandwidth config option but it doesn't end up
90 changing their advertised bandwidth numbers. Bugfix on 0.2.0.28-rc;
91 fixes bug 1026. Patch from Sebastian.
92 - Avoid leaking memory every time we get a create cell but we have
93 so many already queued that we refuse it. Bugfix on 0.2.0.19-alpha;
94 fixes bug 1034. Reported by BarkerJr.
97 Changes in version 0.2.1.18 - 2009-07-24
98 Tor 0.2.1.18 lays the foundations for performance improvements,
99 adds status events to help users diagnose bootstrap problems, adds
100 optional authentication/authorization for hidden services, fixes a
101 variety of potential anonymity problems, and includes a huge pile of
102 other features and bug fixes.
105 - Add LIBS=-lrt to Makefile.am so the Tor RPMs use a static libevent.
108 Changes in version 0.2.1.17-rc - 2009-07-07
109 Tor 0.2.1.17-rc marks the fourth -- and hopefully last -- release
110 candidate for the 0.2.1.x series. It lays the groundwork for further
111 client performance improvements, and also fixes a big bug with directory
112 authorities that were causing them to assign Guard and Stable flags
115 The Windows bundles also finally include the geoip database that we
116 thought we'd been shipping since 0.2.0.x (oops), and the OS X bundles
117 should actually install Torbutton rather than giving you a cryptic
118 failure message (oops).
121 - Clients now use the bandwidth values in the consensus, rather than
122 the bandwidth values in each relay descriptor. This approach opens
123 the door to more accurate bandwidth estimates once the directory
124 authorities start doing active measurements. Implements more of
128 - When Tor clients restart after 1-5 days, they discard all their
129 cached descriptors as too old, but they still use the cached
130 consensus document. This approach is good for robustness, but
131 bad for performance: since they don't know any bandwidths, they
132 end up choosing at random rather than weighting their choice by
133 speed. Fixed by the above feature of putting bandwidths in the
134 consensus. Bugfix on 0.2.0.x.
135 - Directory authorities were neglecting to mark relays down in their
136 internal histories if the relays fall off the routerlist without
137 ever being found unreachable. So there were relays in the histories
138 that haven't been seen for eight months, and are listed as being
139 up for eight months. This wreaked havoc on the "median wfu"
140 and "median mtbf" calculations, in turn making Guard and Stable
141 flags very wrong, hurting network performance. Fixes bugs 696 and
142 969. Bugfix on 0.2.0.6-alpha.
145 - Serve the DirPortFrontPage page even when we have been approaching
146 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
147 - The control port would close the connection before flushing long
148 replies, such as the network consensus, if a QUIT command was issued
149 before the reply had completed. Now, the control port flushes all
150 pending replies before closing the connection. Also fixed a spurious
151 warning when a QUIT command is issued after a malformed or rejected
152 AUTHENTICATE command, but before the connection was closed. Patch
153 by Marcus Griep. Bugfix on 0.2.0.x; fixes bugs 1015 and 1016.
154 - When we can't find an intro key for a v2 hidden service descriptor,
155 fall back to the v0 hidden service descriptor and log a bug message.
156 Workaround for bug 1024.
157 - Fix a log message that did not respect the SafeLogging option.
161 - If we're a relay and we change our IP address, be more verbose
162 about the reason that made us change. Should help track down
163 further bugs for relays on dynamic IP addresses.
166 Changes in version 0.2.0.35 - 2009-06-24
168 - Avoid crashing in the presence of certain malformed descriptors.
169 Found by lark, and by automated fuzzing.
170 - Fix an edge case where a malicious exit relay could convince a
171 controller that the client's DNS question resolves to an internal IP
172 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
175 - Finally fix the bug where dynamic-IP relays disappear when their
176 IP address changes: directory mirrors were mistakenly telling
177 them their old address if they asked via begin_dir, so they
178 never got an accurate answer about their new address, so they
179 just vanished after a day. For belt-and-suspenders, relays that
180 don't set Address in their config now avoid using begin_dir for
181 all direct connections. Should fix bugs 827, 883, and 900.
182 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
183 that would occur on some exit nodes when DNS failures and timeouts
184 occurred in certain patterns. Fix for bug 957.
187 - When starting with a cache over a few days old, do not leak
188 memory for the obsolete router descriptors in it. Bugfix on
189 0.2.0.33; fixes bug 672.
190 - Hidden service clients didn't use a cached service descriptor that
191 was older than 15 minutes, but wouldn't fetch a new one either,
192 because there was already one in the cache. Now, fetch a v2
193 descriptor unless the same descriptor was added to the cache within
194 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
197 Changes in version 0.2.1.16-rc - 2009-06-20
198 Tor 0.2.1.16-rc speeds up performance for fast exit relays, and fixes
199 a bunch of minor bugs.
202 - Fix an edge case where a malicious exit relay could convince a
203 controller that the client's DNS question resolves to an internal IP
204 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
206 o Major performance improvements (on 0.2.0.x):
207 - Disable and refactor some debugging checks that forced a linear scan
208 over the whole server-side DNS cache. These accounted for over 50%
209 of CPU time on a relatively busy exit node's gprof profile. Found
211 - Disable some debugging checks that appeared in exit node profile
215 - Update to the "June 3 2009" ip-to-country file.
216 - Do not have tor-resolve automatically refuse all .onion addresses;
217 if AutomapHostsOnResolve is set in your torrc, this will work fine.
219 o Minor bugfixes (on 0.2.0.x):
220 - Log correct error messages for DNS-related network errors on
222 - Fix a race condition that could cause crashes or memory corruption
223 when running as a server with a controller listening for log
225 - Avoid crashing when we have a policy specified in a DirPolicy or
226 SocksPolicy or ReachableAddresses option with ports set on it,
227 and we re-load the policy. May fix bug 996.
228 - Hidden service clients didn't use a cached service descriptor that
229 was older than 15 minutes, but wouldn't fetch a new one either,
230 because there was already one in the cache. Now, fetch a v2
231 descriptor unless the same descriptor was added to the cache within
232 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
234 o Minor bugfixes (on 0.2.1.x):
235 - Don't warn users about low port and hibernation mix when they
236 provide a *ListenAddress directive to fix that. Bugfix on
238 - When switching back and forth between bridge mode, do not start
239 gathering GeoIP data until two hours have passed.
240 - Do not complain that the user has requested an excluded node as
241 an exit when the node is not really an exit. This could happen
242 because the circuit was for testing, or an introduction point.
246 Changes in version 0.2.1.15-rc - 2009-05-25
247 Tor 0.2.1.15-rc marks the second release candidate for the 0.2.1.x
248 series. It fixes a major bug on fast exit relays, as well as a variety
251 o Major bugfixes (on 0.2.0.x):
252 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
253 that would occur on some exit nodes when DNS failures and timeouts
254 occurred in certain patterns. Fix for bug 957.
256 o Minor bugfixes (on 0.2.0.x):
257 - Actually return -1 in the error case for read_bandwidth_usage().
258 Harmless bug, since we currently don't care about the return value
259 anywhere. Bugfix on 0.2.0.9-alpha.
260 - Provide a more useful log message if bug 977 (related to buffer
261 freelists) ever reappears, and do not crash right away.
262 - Fix an assertion failure on 64-bit platforms when we allocated
263 memory right up to the end of a memarea, then realigned the memory
264 one step beyond the end. Fixes a possible cause of bug 930.
265 - Protect the count of open sockets with a mutex, so we can't
266 corrupt it when two threads are closing or opening sockets at once.
267 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
268 - Don't allow a bridge to publish its router descriptor to a
269 non-bridge directory authority. Fixes part of bug 932.
270 - When we change to or from being a bridge, reset our counts of
271 client usage by country. Fixes bug 932.
272 - Fix a bug that made stream bandwidth get misreported to the
274 - Stop using malloc_usable_size() to use more area than we had
275 actually allocated: it was safe, but made valgrind really unhappy.
276 - Fix a memory leak when v3 directory authorities load their keys
277 and cert from disk. Bugfix on 0.2.0.1-alpha.
279 o Minor bugfixes (on 0.2.1.x):
280 - Fix use of freed memory when deciding to mark a non-addable
281 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
284 Changes in version 0.2.1.14-rc - 2009-04-12
285 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
286 series. It begins fixing some major performance problems, and also
287 finally addresses the bug that was causing relays on dynamic IP
288 addresses to fall out of the directory.
291 - Clients replace entry guards that were chosen more than a few months
292 ago. This change should significantly improve client performance,
293 especially once more people upgrade, since relays that have been
294 a guard for a long time are currently overloaded.
296 o Major bugfixes (on 0.2.0):
297 - Finally fix the bug where dynamic-IP relays disappear when their
298 IP address changes: directory mirrors were mistakenly telling
299 them their old address if they asked via begin_dir, so they
300 never got an accurate answer about their new address, so they
301 just vanished after a day. For belt-and-suspenders, relays that
302 don't set Address in their config now avoid using begin_dir for
303 all direct connections. Should fix bugs 827, 883, and 900.
304 - Relays were falling out of the networkstatus consensus for
305 part of a day if they changed their local config but the
306 authorities discarded their new descriptor as "not sufficiently
307 different". Now directory authorities accept a descriptor as changed
308 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
310 - Avoid crashing in the presence of certain malformed descriptors.
311 Found by lark, and by automated fuzzing.
314 - When generating circuit events with verbose nicknames for
315 controllers, try harder to look up nicknames for routers on a
316 circuit. (Previously, we would look in the router descriptors we had
317 for nicknames, but not in the consensus.) Partial fix for bug 941.
318 - If the bridge config line doesn't specify a port, assume 443.
319 This makes bridge lines a bit smaller and easier for users to
321 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
322 bytes (aka 20KB/s), to match our documentation. Also update
323 directory authorities so they always assign the Fast flag to relays
324 with 20KB/s of capacity. Now people running relays won't suddenly
325 find themselves not seeing any use, if the network gets faster
327 - Update to the "April 3 2009" ip-to-country file.
330 - Avoid trying to print raw memory to the logs when we decide to
331 give up on downloading a given relay descriptor. Bugfix on
333 - In tor-resolve, when the Tor client to use is specified by
334 <hostname>:<port>, actually use the specified port rather than
335 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
336 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
337 - When starting with a cache over a few days old, do not leak
338 memory for the obsolete router descriptors in it. Bugfix on
340 - Avoid double-free on list of successfully uploaded hidden
341 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
342 - Change memarea_strndup() implementation to work even when
343 duplicating a string at the end of a page. This bug was
344 harmless for now, but could have meant crashes later. Fix by
345 lark. Bugfix on 0.2.1.1-alpha.
346 - Limit uploaded directory documents to be 16M rather than 500K.
347 The directory authorities were refusing v3 consensus votes from
348 other authorities, since the votes are now 504K. Fixes bug 959;
349 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
350 - Directory authorities should never send a 503 "busy" response to
351 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
355 Changes in version 0.2.1.13-alpha - 2009-03-09
356 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
357 cleanups. We're finally getting close to a release candidate.
360 - Correctly update the list of which countries we exclude as
361 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
362 lark. Bugfix on 0.2.1.6-alpha.
364 o Minor bugfixes (on 0.2.0.x and earlier):
365 - Automatically detect MacOSX versions earlier than 10.4.0, and
366 disable kqueue from inside Tor when running with these versions.
367 We previously did this from the startup script, but that was no
368 help to people who didn't use the startup script. Resolves bug 863.
369 - When we had picked an exit node for a connection, but marked it as
370 "optional", and it turned out we had no onion key for the exit,
371 stop wanting that exit and try again. This situation may not
372 be possible now, but will probably become feasible with proposal
373 158. Spotted by rovv. Fixes another case of bug 752.
374 - Clients no longer cache certificates for authorities they do not
375 recognize. Bugfix on 0.2.0.9-alpha.
376 - When we can't transmit a DNS request due to a network error, retry
377 it after a while, and eventually transmit a failing response to
378 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
379 - If the controller claimed responsibility for a stream, but that
380 stream never finished making its connection, it would live
381 forever in circuit_wait state. Now we close it after SocksTimeout
382 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
383 - Drop begin cells to a hidden service if they come from the middle
384 of a circuit. Patch from lark.
385 - When we erroneously receive two EXTEND cells for the same circuit
386 ID on the same connection, drop the second. Patch from lark.
387 - Fix a crash that occurs on exit nodes when a nameserver request
388 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
389 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
391 - Do not assume that a stack-allocated character array will be
392 64-bit aligned on platforms that demand that uint64_t access is
393 aligned. Possible fix for bug 604.
394 - Parse dates and IPv4 addresses in a locale- and libc-independent
395 manner, to avoid platform-dependent behavior on malformed input.
396 - Build correctly when configured to build outside the main source
397 path. Patch from Michael Gold.
398 - We were already rejecting relay begin cells with destination port
399 of 0. Now also reject extend cells with destination port or address
400 of 0. Suggested by lark.
402 o Minor bugfixes (on 0.2.1.x):
403 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
404 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
405 - If we're an exit node, scrub the IP address to which we are exiting
406 in the logs. Bugfix on 0.2.1.8-alpha.
409 - On Linux, use the prctl call to re-enable core dumps when the user
411 - New controller event NEWCONSENSUS that lists the networkstatus
412 lines for every recommended relay. Now controllers like Torflow
413 can keep up-to-date on which relays they should be using.
414 - Update to the "February 26 2009" ip-to-country file.
417 Changes in version 0.2.0.34 - 2009-02-08
418 Tor 0.2.0.34 features several more security-related fixes. You should
419 upgrade, especially if you run an exit relay (remote crash) or a
420 directory authority (remote infinite loop), or you're on an older
421 (pre-XP) or not-recently-patched Windows (remote exploit).
423 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
424 have many known flaws, and nobody should be using them. You should
425 upgrade. If you're using a Linux or BSD and its packages are obsolete,
426 stop using those packages and upgrade anyway.
429 - Fix an infinite-loop bug on handling corrupt votes under certain
430 circumstances. Bugfix on 0.2.0.8-alpha.
431 - Fix a temporary DoS vulnerability that could be performed by
432 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
433 - Avoid a potential crash on exit nodes when processing malformed
434 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
435 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
436 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
439 - Fix compilation on systems where time_t is a 64-bit integer.
440 Patch from Matthias Drochner.
441 - Don't consider expiring already-closed client connections. Fixes
442 bug 893. Bugfix on 0.0.2pre20.
445 Changes in version 0.2.1.12-alpha - 2009-02-08
446 Tor 0.2.1.12-alpha features several more security-related fixes. You
447 should upgrade, especially if you run an exit relay (remote crash) or
448 a directory authority (remote infinite loop), or you're on an older
449 (pre-XP) or not-recently-patched Windows (remote exploit). It also
450 includes a big pile of minor bugfixes and cleanups.
453 - Fix an infinite-loop bug on handling corrupt votes under certain
454 circumstances. Bugfix on 0.2.0.8-alpha.
455 - Fix a temporary DoS vulnerability that could be performed by
456 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
457 - Avoid a potential crash on exit nodes when processing malformed
458 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
461 - Let controllers actually ask for the "clients_seen" event for
462 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
463 reported by Matt Edman.
464 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
466 - Fix a bug in address parsing that was preventing bridges or hidden
467 service targets from being at IPv6 addresses.
468 - Solve a bug that kept hardware crypto acceleration from getting
469 enabled when accounting was turned on. Fixes bug 907. Bugfix on
471 - Remove a bash-ism from configure.in to build properly on non-Linux
472 platforms. Bugfix on 0.2.1.1-alpha.
473 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
474 headers. Bugfix on 0.2.0.10-alpha.
475 - Don't consider expiring already-closed client connections. Fixes
476 bug 893. Bugfix on 0.0.2pre20.
477 - Fix another interesting corner-case of bug 891 spotted by rovv:
478 Previously, if two hosts had different amounts of clock drift, and
479 one of them created a new connection with just the wrong timing,
480 the other might decide to deprecate the new connection erroneously.
481 Bugfix on 0.1.1.13-alpha.
482 - Resolve a very rare crash bug that could occur when the user forced
483 a nameserver reconfiguration during the middle of a nameserver
484 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
485 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
486 Bugfix on 0.2.1.7-alpha.
487 - If we're using bridges and our network goes away, be more willing
488 to forgive our bridges and try again when we get an application
489 request. Bugfix on 0.2.0.x.
492 - Support platforms where time_t is 64 bits long. (Congratulations,
493 NetBSD!) Patch from Matthias Drochner.
494 - Add a 'getinfo status/clients-seen' controller command, in case
495 controllers want to hear clients_seen events but connect late.
498 - Disable GCC's strict alias optimization by default, to avoid the
499 likelihood of its introducing subtle bugs whenever our code violates
500 the letter of C99's alias rules.
503 Changes in version 0.2.0.33 - 2009-01-21
504 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
505 useful to users. It also finally fixes a bug where a relay or client
506 that's been off for many days would take a long time to bootstrap.
508 This update also fixes an important security-related bug reported by
509 Ilja van Sprundel. You should upgrade. (We'll send out more details
510 about the bug once people have had some time to upgrade.)
513 - Fix a heap-corruption bug that may be remotely triggerable on
514 some platforms. Reported by Ilja van Sprundel.
517 - When a stream at an exit relay is in state "resolving" or
518 "connecting" and it receives an "end" relay cell, the exit relay
519 would silently ignore the end cell and not close the stream. If
520 the client never closes the circuit, then the exit relay never
521 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
523 - When sending CREATED cells back for a given circuit, use a 64-bit
524 connection ID to find the right connection, rather than an addr:port
525 combination. Now that we can have multiple OR connections between
526 the same ORs, it is no longer possible to use addr:port to uniquely
527 identify a connection.
528 - Bridge relays that had DirPort set to 0 would stop fetching
529 descriptors shortly after startup, and then briefly resume
530 after a new bandwidth test and/or after publishing a new bridge
531 descriptor. Bridge users that try to bootstrap from them would
532 get a recent networkstatus but would get descriptors from up to
533 18 hours earlier, meaning most of the descriptors were obsolete
534 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
535 - Prevent bridge relays from serving their 'extrainfo' document
536 to anybody who asks, now that extrainfo docs include potentially
537 sensitive aggregated client geoip summaries. Bugfix on
539 - If the cached networkstatus consensus is more than five days old,
540 discard it rather than trying to use it. In theory it could be
541 useful because it lists alternate directory mirrors, but in practice
542 it just means we spend many minutes trying directory mirrors that
543 are long gone from the network. Also discard router descriptors as
544 we load them if they are more than five days old, since the onion
545 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
548 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
549 could make gcc generate non-functional binary search code. Bugfix
551 - Build correctly on platforms without socklen_t.
552 - Compile without warnings on solaris.
553 - Avoid potential crash on internal error during signature collection.
554 Fixes bug 864. Patch from rovv.
555 - Correct handling of possible malformed authority signing key
556 certificates with internal signature types. Fixes bug 880.
557 Bugfix on 0.2.0.3-alpha.
558 - Fix a hard-to-trigger resource leak when logging credential status.
560 - When we can't initialize DNS because the network is down, do not
561 automatically stop Tor from starting. Instead, we retry failed
562 dns_init() every 10 minutes, and change the exit policy to reject
563 *:* until one succeeds. Fixes bug 691.
564 - Use 64 bits instead of 32 bits for connection identifiers used with
565 the controller protocol, to greatly reduce risk of identifier reuse.
566 - When we're choosing an exit node for a circuit, and we have
567 no pending streams, choose a good general exit rather than one that
568 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
569 - Fix another case of assuming, when a specific exit is requested,
570 that we know more than the user about what hosts it allows.
571 Fixes one case of bug 752. Patch from rovv.
572 - Clip the MaxCircuitDirtiness config option to a minimum of 10
573 seconds. Warn the user if lower values are given in the
574 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
575 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
576 user if lower values are given in the configuration. Bugfix on
577 0.1.1.17-rc. Patch by Sebastian.
578 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
579 the cache because we already had a v0 descriptor with the same ID.
580 Bugfix on 0.2.0.18-alpha.
581 - Fix a race condition when freeing keys shared between main thread
582 and CPU workers that could result in a memory leak. Bugfix on
583 0.1.0.1-rc. Fixes bug 889.
584 - Send a valid END cell back when a client tries to connect to a
585 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
586 840. Patch from rovv.
587 - Check which hops rendezvous stream cells are associated with to
588 prevent possible guess-the-streamid injection attacks from
589 intermediate hops. Fixes another case of bug 446. Based on patch
591 - If a broken client asks a non-exit router to connect somewhere,
592 do not even do the DNS lookup before rejecting the connection.
593 Fixes another case of bug 619. Patch from rovv.
594 - When a relay gets a create cell it can't decrypt (e.g. because it's
595 using the wrong onion key), we were dropping it and letting the
596 client time out. Now actually answer with a destroy cell. Fixes
597 bug 904. Bugfix on 0.0.2pre8.
599 o Minor bugfixes (hidden services):
600 - Do not throw away existing introduction points on SIGHUP. Bugfix on
601 0.0.6pre1. Patch by Karsten. Fixes bug 874.
604 - Report the case where all signatures in a detached set are rejected
605 differently than the case where there is an error handling the
607 - When we realize that another process has modified our cached
608 descriptors, print out a more useful error message rather than
609 triggering an assertion. Fixes bug 885. Patch from Karsten.
610 - Implement the 0x20 hack to better resist DNS poisoning: set the
611 case on outgoing DNS requests randomly, and reject responses that do
612 not match the case correctly. This logic can be disabled with the
613 ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
614 of servers that do not reliably preserve case in replies. See
615 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
617 - Check DNS replies for more matching fields to better resist DNS
619 - Never use OpenSSL compression: it wastes RAM and CPU trying to
620 compress cells, which are basically all encrypted, compressed, or
624 Changes in version 0.2.1.11-alpha - 2009-01-20
625 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
626 week it will take a long time to bootstrap again" bug. It also fixes
627 an important security-related bug reported by Ilja van Sprundel. You
628 should upgrade. (We'll send out more details about the bug once people
629 have had some time to upgrade.)
632 - Fix a heap-corruption bug that may be remotely triggerable on
633 some platforms. Reported by Ilja van Sprundel.
636 - Discard router descriptors as we load them if they are more than
637 five days old. Otherwise if Tor is off for a long time and then
638 starts with cached descriptors, it will try to use the onion
639 keys in those obsolete descriptors when building circuits. Bugfix
640 on 0.2.0.x. Fixes bug 887.
643 - Try to make sure that the version of Libevent we're running with
644 is binary-compatible with the one we built with. May address bug
646 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
647 for bug 905. Bugfix on 0.2.1.7-alpha.
648 - Add a new --enable-local-appdata configuration switch to change
649 the default location of the datadir on win32 from APPDATA to
650 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
651 entirely. Patch from coderman.
654 - Make outbound DNS packets respect the OutboundBindAddress setting.
655 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
656 - When our circuit fails at the first hop (e.g. we get a destroy
657 cell back), avoid using that OR connection anymore, and also
658 tell all the one-hop directory requests waiting for it that they
659 should fail. Bugfix on 0.2.1.3-alpha.
660 - In the torify(1) manpage, mention that tsocks will leak your
664 Changes in version 0.2.1.10-alpha - 2009-01-06
665 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
666 would make the bridge relay not so useful if it had DirPort set to 0,
667 and one that could let an attacker learn a little bit of information
668 about the bridge's users), and a bug that would cause your Tor relay
669 to ignore a circuit create request it can't decrypt (rather than reply
670 with an error). It also fixes a wide variety of other bugs.
673 - If the cached networkstatus consensus is more than five days old,
674 discard it rather than trying to use it. In theory it could
675 be useful because it lists alternate directory mirrors, but in
676 practice it just means we spend many minutes trying directory
677 mirrors that are long gone from the network. Helps bug 887 a bit;
679 - Bridge relays that had DirPort set to 0 would stop fetching
680 descriptors shortly after startup, and then briefly resume
681 after a new bandwidth test and/or after publishing a new bridge
682 descriptor. Bridge users that try to bootstrap from them would
683 get a recent networkstatus but would get descriptors from up to
684 18 hours earlier, meaning most of the descriptors were obsolete
685 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
686 - Prevent bridge relays from serving their 'extrainfo' document
687 to anybody who asks, now that extrainfo docs include potentially
688 sensitive aggregated client geoip summaries. Bugfix on
692 - New controller event "clients_seen" to report a geoip-based summary
693 of which countries we've seen clients from recently. Now controllers
694 like Vidalia can show bridge operators that they're actually making
696 - Build correctly against versions of OpenSSL 0.9.8 or later built
697 without support for deprecated functions.
698 - Update to the "December 19 2008" ip-to-country file.
700 o Minor bugfixes (on 0.2.0.x):
701 - Authorities now vote for the Stable flag for any router whose
702 weighted MTBF is at least 5 days, regardless of the mean MTBF.
703 - Do not remove routers as too old if we do not have any consensus
704 document. Bugfix on 0.2.0.7-alpha.
705 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
706 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
707 - When an exit relay resolves a stream address to a local IP address,
708 do not just keep retrying that same exit relay over and
709 over. Instead, just close the stream. Addresses bug 872. Bugfix
710 on 0.2.0.32. Patch from rovv.
711 - If a hidden service sends us an END cell, do not consider
712 retrying the connection; just close it. Patch from rovv.
713 - When we made bridge authorities stop serving bridge descriptors over
714 unencrypted links, we also broke DirPort reachability testing for
715 bridges. So bridges with a non-zero DirPort were printing spurious
716 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
717 - When a relay gets a create cell it can't decrypt (e.g. because it's
718 using the wrong onion key), we were dropping it and letting the
719 client time out. Now actually answer with a destroy cell. Fixes
720 bug 904. Bugfix on 0.0.2pre8.
721 - Squeeze 2-5% out of client performance (according to oprofile) by
722 improving the implementation of some policy-manipulation functions.
724 o Minor bugfixes (on 0.2.1.x):
725 - Make get_interface_address() function work properly again; stop
726 guessing the wrong parts of our address as our address.
727 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
728 send on that circuit. Otherwise we might violate the proposal-110
729 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
731 - When we're sending non-EXTEND cells to the first hop in a circuit,
732 for example to use an encrypted directory connection, we don't need
733 to use RELAY_EARLY cells: the first hop knows what kind of cell
734 it is, and nobody else can even see the cell type. Conserving
735 RELAY_EARLY cells makes it easier to cannibalize circuits like
737 - Stop logging nameserver addresses in reverse order.
738 - If we are retrying a directory download slowly over and over, do
739 not automatically give up after the 254th failure. Bugfix on
741 - Resume reporting accurate "stream end" reasons to the local control
742 port. They were lost in the changes for Proposal 148. Bugfix on
745 o Deprecated and removed features:
746 - The old "tor --version --version" command, which would print out
747 the subversion "Id" of most of the source files, is now removed. It
748 turned out to be less useful than we'd expected, and harder to
751 o Code simplifications and refactoring:
752 - Change our header file guard macros to be less likely to conflict
753 with system headers. Adam Langley noticed that we were conflicting
754 with log.h on Android.
755 - Tool-assisted documentation cleanup. Nearly every function or
756 static variable in Tor should have its own documentation now.
759 Changes in version 0.2.1.9-alpha - 2008-12-25
760 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
762 o New directory authorities:
763 - gabelmoo (the authority run by Karsten Loesing) now has a new
767 - Never use a connection with a mismatched address to extend a
768 circuit, unless that connection is canonical. A canonical
769 connection is one whose address is authenticated by the router's
770 identity key, either in a NETINFO cell or in a router descriptor.
771 - Avoid a possible memory corruption bug when receiving hidden service
772 descriptors. Bugfix on 0.2.1.6-alpha.
775 - Fix a logic error that would automatically reject all but the first
776 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
777 part of bug 813/868. Bug spotted by coderman.
778 - When a stream at an exit relay is in state "resolving" or
779 "connecting" and it receives an "end" relay cell, the exit relay
780 would silently ignore the end cell and not close the stream. If
781 the client never closes the circuit, then the exit relay never
782 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
784 - When we can't initialize DNS because the network is down, do not
785 automatically stop Tor from starting. Instead, retry failed
786 dns_init() every 10 minutes, and change the exit policy to reject
787 *:* until one succeeds. Fixes bug 691.
790 - Give a better error message when an overzealous init script says
791 "sudo -u username tor --user username". Makes Bug 882 easier for
793 - When a directory authority gives us a new guess for our IP address,
794 log which authority we used. Hopefully this will help us debug
795 the recent complaints about bad IP address guesses.
796 - Detect svn revision properly when we're using git-svn.
797 - Try not to open more than one descriptor-downloading connection
798 to an authority at once. This should reduce load on directory
799 authorities. Fixes bug 366.
800 - Add cross-certification to newly generated certificates, so that
801 a signing key is enough information to look up a certificate.
802 Partial implementation of proposal 157.
803 - Start serving certificates by <identity digest, signing key digest>
804 pairs. Partial implementation of proposal 157.
805 - Clients now never report any stream end reason except 'MISC'.
806 Implements proposal 148.
807 - On platforms with a maximum syslog string length, truncate syslog
808 messages to that length ourselves, rather than relying on the
809 system to do it for us.
810 - Optimize out calls to time(NULL) that occur for every IO operation,
811 or for every cell. On systems where time() is a slow syscall,
812 this fix will be slightly helpful.
813 - Exit servers can now answer resolve requests for ip6.arpa addresses.
814 - When we download a descriptor that we then immediately (as
815 a directory authority) reject, do not retry downloading it right
816 away. Should save some bandwidth on authorities. Fix for bug
817 888. Patch by Sebastian Hahn.
818 - When a download gets us zero good descriptors, do not notify
819 Tor that new directory information has arrived.
820 - Avoid some nasty corner cases in the logic for marking connections
821 as too old or obsolete or noncanonical for circuits. Partial
824 o Minor features (controller):
825 - New CONSENSUS_ARRIVED event to note when a new consensus has
826 been fetched and validated.
827 - When we realize that another process has modified our cached
828 descriptors file, print out a more useful error message rather
829 than triggering an assertion. Fixes bug 885. Patch from Karsten.
830 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
831 controllers to prevent SIGHUP from reloading the
832 configuration. Fixes bug 856.
835 - Resume using the correct "REASON=" stream when telling the
836 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
837 - When a canonical connection appears later in our internal list
838 than a noncanonical one for a given OR ID, always use the
839 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
841 - Clip the MaxCircuitDirtiness config option to a minimum of 10
842 seconds. Warn the user if lower values are given in the
843 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
844 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
845 user if lower values are given in the configuration. Bugfix on
846 0.1.1.17-rc. Patch by Sebastian.
847 - Fix a race condition when freeing keys shared between main thread
848 and CPU workers that could result in a memory leak. Bugfix on
849 0.1.0.1-rc. Fixes bug 889.
851 o Minor bugfixes (hidden services):
852 - Do not throw away existing introduction points on SIGHUP (bugfix on
853 0.0.6pre1); also, do not stall hidden services because we're
854 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
855 by John Brooks. Patch by Karsten. Fixes bug 874.
856 - Fix a memory leak when we decline to add a v2 rendezvous
857 descriptor to the cache because we already had a v0 descriptor
858 with the same ID. Bugfix on 0.2.0.18-alpha.
860 o Deprecated and removed features:
861 - RedirectExits has been removed. It was deprecated since
863 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
864 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
865 - Cell pools are now always enabled; --disable-cell-pools is ignored.
867 o Code simplifications and refactoring:
868 - Rename the confusing or_is_obsolete field to the more appropriate
869 is_bad_for_new_circs, and move it to or_connection_t where it
871 - Move edge-only flags from connection_t to edge_connection_t: not
872 only is this better coding, but on machines of plausible alignment,
873 it should save 4-8 bytes per connection_t. "Every little bit helps."
874 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
875 for consistency; keep old option working for backward compatibility.
876 - Simplify the code for finding connections to use for a circuit.
879 Changes in version 0.2.1.8-alpha - 2008-12-08
880 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
881 builds better on unusual platforms like Solaris and old OS X, and
882 fixes a variety of other issues.
885 - New DirPortFrontPage option that takes an html file and publishes
886 it as "/" on the DirPort. Now relay operators can provide a
887 disclaimer without needing to set up a separate webserver. There's
888 a sample disclaimer in contrib/tor-exit-notice.html.
891 - When the client is choosing entry guards, now it selects at most
892 one guard from a given relay family. Otherwise we could end up with
893 all of our entry points into the network run by the same operator.
894 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
897 - Fix a DOS opportunity during the voting signature collection process
898 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
899 - Fix a possible segfault when establishing an exit connection. Bugfix
903 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
905 - Made Tor a little less aggressive about deleting expired
906 certificates. Partial fix for bug 854.
907 - Stop doing unaligned memory access that generated bus errors on
908 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
909 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
910 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
911 - Make USR2 log-level switch take effect immediately. Bugfix on
913 - If one win32 nameserver fails to get added, continue adding the
914 rest, and don't automatically fail.
915 - Use fcntl() for locking when flock() is not available. Should fix
916 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
917 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
918 could make gcc generate non-functional binary search code. Bugfix
920 - Build correctly on platforms without socklen_t.
921 - Avoid potential crash on internal error during signature collection.
922 Fixes bug 864. Patch from rovv.
923 - Do not use C's stdio library for writing to log files. This will
924 improve logging performance by a minute amount, and will stop
925 leaking fds when our disk is full. Fixes bug 861.
926 - Stop erroneous use of O_APPEND in cases where we did not in fact
927 want to re-seek to the end of a file before every last write().
928 - Correct handling of possible malformed authority signing key
929 certificates with internal signature types. Fixes bug 880. Bugfix
931 - Fix a hard-to-trigger resource leak when logging credential status.
935 - Directory mirrors no longer fetch the v1 directory or
936 running-routers files. They are obsolete, and nobody asks for them
937 anymore. This is the first step to making v1 authorities obsolete.
939 o Minor features (controller):
940 - Return circuit purposes in response to GETINFO circuit-status. Fixes
944 Changes in version 0.2.0.32 - 2008-11-20
945 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
946 packages (and maybe other packages) noticed by Theo de Raadt, fixes
947 a smaller security flaw that might allow an attacker to access local
948 services, further improves hidden service performance, and fixes a
949 variety of other issues.
952 - The "User" and "Group" config options did not clear the
953 supplementary group entries for the Tor process. The "User" option
954 is now more robust, and we now set the groups to the specified
955 user's primary group. The "Group" option is now ignored. For more
956 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
957 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
958 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
959 - The "ClientDNSRejectInternalAddresses" config option wasn't being
960 consistently obeyed: if an exit relay refuses a stream because its
961 exit policy doesn't allow it, we would remember what IP address
962 the relay said the destination address resolves to, even if it's
963 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
966 - Fix a DOS opportunity during the voting signature collection process
967 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
969 o Major bugfixes (hidden services):
970 - When fetching v0 and v2 rendezvous service descriptors in parallel,
971 we were failing the whole hidden service request when the v0
972 descriptor fetch fails, even if the v2 fetch is still pending and
973 might succeed. Similarly, if the last v2 fetch fails, we were
974 failing the whole hidden service request even if a v0 fetch is
975 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
976 - When extending a circuit to a hidden service directory to upload a
977 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
978 requests failed, because the router descriptor has not been
979 downloaded yet. In these cases, do not attempt to upload the
980 rendezvous descriptor, but wait until the router descriptor is
981 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
982 descriptor from a hidden service directory for which the router
983 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
987 - Fix several infrequent memory leaks spotted by Coverity.
988 - When testing for libevent functions, set the LDFLAGS variable
989 correctly. Found by Riastradh.
990 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
991 bootstrapping with tunneled directory connections. Bugfix on
992 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
993 - When asked to connect to A.B.exit:80, if we don't know the IP for A
994 and we know that server B rejects most-but-not all connections to
995 port 80, we would previously reject the connection. Now, we assume
996 the user knows what they were asking for. Fixes bug 752. Bugfix
997 on 0.0.9rc5. Diagnosed by BarkerJr.
998 - If we overrun our per-second write limits a little, count this as
999 having used up our write allocation for the second, and choke
1000 outgoing directory writes. Previously, we had only counted this when
1001 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
1002 Bugfix on 0.2.0.x (??).
1003 - Remove the old v2 directory authority 'lefkada' from the default
1004 list. It has been gone for many months.
1005 - Stop doing unaligned memory access that generated bus errors on
1006 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
1007 - Make USR2 log-level switch take effect immediately. Bugfix on
1010 o Minor bugfixes (controller):
1011 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
1012 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
1015 Changes in version 0.2.1.7-alpha - 2008-11-08
1016 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
1017 packages (and maybe other packages) noticed by Theo de Raadt, fixes
1018 a smaller security flaw that might allow an attacker to access local
1019 services, adds better defense against DNS poisoning attacks on exit
1020 relays, further improves hidden service performance, and fixes a
1021 variety of other issues.
1024 - The "ClientDNSRejectInternalAddresses" config option wasn't being
1025 consistently obeyed: if an exit relay refuses a stream because its
1026 exit policy doesn't allow it, we would remember what IP address
1027 the relay said the destination address resolves to, even if it's
1028 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
1029 - The "User" and "Group" config options did not clear the
1030 supplementary group entries for the Tor process. The "User" option
1031 is now more robust, and we now set the groups to the specified
1032 user's primary group. The "Group" option is now ignored. For more
1033 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
1034 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
1035 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
1036 - Do not use or believe expired v3 authority certificates. Patch
1037 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
1040 - Now NodeFamily and MyFamily config options allow spaces in
1041 identity fingerprints, so it's easier to paste them in.
1042 Suggested by Lucky Green.
1043 - Implement the 0x20 hack to better resist DNS poisoning: set the
1044 case on outgoing DNS requests randomly, and reject responses that do
1045 not match the case correctly. This logic can be disabled with the
1046 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
1047 of servers that do not reliably preserve case in replies. See
1048 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
1050 - Preserve case in replies to DNSPort requests in order to support
1051 the 0x20 hack for resisting DNS poisoning attacks.
1053 o Hidden service performance improvements:
1054 - When the client launches an introduction circuit, retry with a
1055 new circuit after 30 seconds rather than 60 seconds.
1056 - Launch a second client-side introduction circuit in parallel
1057 after a delay of 15 seconds (based on work by Christian Wilms).
1058 - Hidden services start out building five intro circuits rather
1059 than three, and when the first three finish they publish a service
1060 descriptor using those. Now we publish our service descriptor much
1061 faster after restart.
1064 - Minor fix in the warning messages when you're having problems
1065 bootstrapping; also, be more forgiving of bootstrap problems when
1066 we're still making incremental progress on a given bootstrap phase.
1067 - When we're choosing an exit node for a circuit, and we have
1068 no pending streams, choose a good general exit rather than one that
1069 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
1070 - Send a valid END cell back when a client tries to connect to a
1071 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
1072 840. Patch from rovv.
1073 - If a broken client asks a non-exit router to connect somewhere,
1074 do not even do the DNS lookup before rejecting the connection.
1075 Fixes another case of bug 619. Patch from rovv.
1076 - Fix another case of assuming, when a specific exit is requested,
1077 that we know more than the user about what hosts it allows.
1078 Fixes another case of bug 752. Patch from rovv.
1079 - Check which hops rendezvous stream cells are associated with to
1080 prevent possible guess-the-streamid injection attacks from
1081 intermediate hops. Fixes another case of bug 446. Based on patch
1083 - Avoid using a negative right-shift when comparing 32-bit
1084 addresses. Possible fix for bug 845 and bug 811.
1085 - Make the assert_circuit_ok() function work correctly on circuits that
1086 have already been marked for close.
1087 - Fix read-off-the-end-of-string error in unit tests when decoding
1088 introduction points.
1089 - Fix uninitialized size field for memory area allocation: may improve
1090 memory performance during directory parsing.
1091 - Treat duplicate certificate fetches as failures, so that we do
1092 not try to re-fetch an expired certificate over and over and over.
1093 - Do not say we're fetching a certificate when we'll in fact skip it
1094 because of a pending download.
1097 Changes in version 0.2.1.6-alpha - 2008-09-30
1098 Tor 0.2.1.6-alpha further improves performance and robustness of
1099 hidden services, starts work on supporting per-country relay selection,
1100 and fixes a variety of smaller issues.
1103 - Implement proposal 121: make it possible to build hidden services
1104 that only certain clients are allowed to connect to. This is
1105 enforced at several points, so that unauthorized clients are unable
1106 to send INTRODUCE cells to the service, or even (depending on the
1107 type of authentication) to learn introduction points. This feature
1108 raises the bar for certain kinds of active attacks against hidden
1109 services. Code by Karsten Loesing.
1110 - Relays now store and serve v2 hidden service descriptors by default,
1111 i.e., the new default value for HidServDirectoryV2 is 1. This is
1112 the last step in proposal 114, which aims to make hidden service
1113 lookups more reliable.
1114 - Start work to allow node restrictions to include country codes. The
1115 syntax to exclude nodes in a country with country code XX is
1116 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
1117 refinement to decide what config options should take priority if
1118 you ask to both use a particular node and exclude it.
1119 - Allow ExitNodes list to include IP ranges and country codes, just
1120 like the Exclude*Nodes lists. Patch from Robert Hogan.
1123 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
1124 Tor to fail to start if you had it configured to use a bridge
1125 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
1126 - When extending a circuit to a hidden service directory to upload a
1127 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
1128 requests failed, because the router descriptor had not been
1129 downloaded yet. In these cases, we now wait until the router
1130 descriptor is downloaded, and then retry. Likewise, clients
1131 now skip over a hidden service directory if they don't yet have
1132 its router descriptor, rather than futilely requesting it and
1133 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
1135 - When fetching v0 and v2 rendezvous service descriptors in parallel,
1136 we were failing the whole hidden service request when the v0
1137 descriptor fetch fails, even if the v2 fetch is still pending and
1138 might succeed. Similarly, if the last v2 fetch fails, we were
1139 failing the whole hidden service request even if a v0 fetch is
1140 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
1141 - DNS replies need to have names matching their requests, but
1142 these names should be in the questions section, not necessarily
1143 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
1146 - Update to the "September 1 2008" ip-to-country file.
1147 - Allow ports 465 and 587 in the default exit policy again. We had
1148 rejected them in 0.1.0.15, because back in 2005 they were commonly
1149 misconfigured and ended up as spam targets. We hear they are better
1150 locked down these days.
1151 - Use a lockfile to make sure that two Tor processes are not
1152 simultaneously running with the same datadir.
1153 - Serve the latest v3 networkstatus consensus via the control
1154 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
1155 - Better logging about stability/reliability calculations on directory
1157 - Drop the requirement to have an open dir port for storing and
1158 serving v2 hidden service descriptors.
1159 - Directory authorities now serve a /tor/dbg-stability.txt URL to
1160 help debug WFU and MTBF calculations.
1161 - Implement most of Proposal 152: allow specialized servers to permit
1162 single-hop circuits, and clients to use those servers to build
1163 single-hop circuits when using a specialized controller. Patch
1164 from Josh Albrecht. Resolves feature request 768.
1165 - Add a -p option to tor-resolve for specifying the SOCKS port: some
1166 people find host:port too confusing.
1167 - Make TrackHostExit mappings expire a while after their last use, not
1168 after their creation. Patch from Robert Hogan.
1169 - Provide circuit purposes along with circuit events to the controller.
1172 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
1174 - Fixed some memory leaks -- some quite frequent, some almost
1175 impossible to trigger -- based on results from Coverity.
1176 - When testing for libevent functions, set the LDFLAGS variable
1177 correctly. Found by Riastradh.
1178 - Fix an assertion bug in parsing policy-related options; possible fix
1180 - Catch and report a few more bootstrapping failure cases when Tor
1181 fails to establish a TCP connection. Cleanup on 0.2.1.x.
1182 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
1183 bootstrapping with tunneled directory connections. Bugfix on
1184 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
1185 - When asked to connect to A.B.exit:80, if we don't know the IP for A
1186 and we know that server B rejects most-but-not all connections to
1187 port 80, we would previously reject the connection. Now, we assume
1188 the user knows what they were asking for. Fixes bug 752. Bugfix
1189 on 0.0.9rc5. Diagnosed by BarkerJr.
1190 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
1191 service directories if they have no advertised dir port. Bugfix
1193 - If we overrun our per-second write limits a little, count this as
1194 having used up our write allocation for the second, and choke
1195 outgoing directory writes. Previously, we had only counted this when
1196 we had met our limits precisely. Fixes bug 824. Patch by rovv.
1197 Bugfix on 0.2.0.x (??).
1198 - Avoid a "0 divided by 0" calculation when calculating router uptime
1199 at directory authorities. Bugfix on 0.2.0.8-alpha.
1200 - Make DNS resolved controller events into "CLOSED", not
1201 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
1203 - Fix a bug where an unreachable relay would establish enough
1204 reachability testing circuits to do a bandwidth test -- if
1205 we already have a connection to the middle hop of the testing
1206 circuit, then it could establish the last hop by using the existing
1207 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
1208 circuits no longer use entry guards in 0.2.1.3-alpha.
1209 - If we have correct permissions on $datadir, we complain to stdout
1210 and fail to start. But dangerous permissions on
1211 $datadir/cached-status/ would cause us to open a log and complain
1212 there. Now complain to stdout and fail to start in both cases. Fixes
1213 bug 820, reported by seeess.
1214 - Remove the old v2 directory authority 'lefkada' from the default
1215 list. It has been gone for many months.
1217 o Code simplifications and refactoring:
1218 - Revise the connection_new functions so that a more typesafe variant
1219 exists. This will work better with Coverity, and let us find any
1220 actual mistakes we're making here.
1221 - Refactor unit testing logic so that dmalloc can be used sensibly
1222 with unit tests to check for memory leaks.
1223 - Move all hidden-service related fields from connection and circuit
1224 structure to substructures: this way they won't eat so much memory.
1227 Changes in version 0.2.0.31 - 2008-09-03
1228 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
1229 a big bug we're seeing where in rare cases traffic from one Tor stream
1230 gets mixed into another stream, and fixes a variety of smaller issues.
1233 - Make sure that two circuits can never exist on the same connection
1234 with the same circuit ID, even if one is marked for close. This
1235 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
1236 - Relays now reject risky extend cells: if the extend cell includes
1237 a digest of all zeroes, or asks to extend back to the relay that
1238 sent the extend cell, tear down the circuit. Ideas suggested
1240 - If not enough of our entry guards are available so we add a new
1241 one, we might use the new one even if it overlapped with the
1242 current circuit's exit relay (or its family). Anonymity bugfix
1243 pointed out by rovv.
1246 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
1247 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
1248 - Correctly detect the presence of the linux/netfilter_ipv4.h header
1249 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
1250 - Pick size of default geoip filename string correctly on windows.
1251 Fixes bug 806. Bugfix on 0.2.0.30.
1252 - Make the autoconf script accept the obsolete --with-ssl-dir
1253 option as an alias for the actually-working --with-openssl-dir
1254 option. Fix the help documentation to recommend --with-openssl-dir.
1255 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
1256 - When using the TransPort option on OpenBSD, and using the User
1257 option to change UID and drop privileges, make sure to open
1258 /dev/pf before dropping privileges. Fixes bug 782. Patch from
1259 Christopher Davis. Bugfix on 0.1.2.1-alpha.
1260 - Try to attach connections immediately upon receiving a RENDEZVOUS2
1261 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
1262 on the client side when connecting to a hidden service. Bugfix
1263 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
1264 - When closing an application-side connection because its circuit is
1265 getting torn down, generate the stream event correctly. Bugfix on
1266 0.1.2.x. Anonymous patch.
1269 Changes in version 0.2.1.5-alpha - 2008-08-31
1270 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
1271 in a lot of the infrastructure for adding authorization to hidden
1272 services, lays the groundwork for having clients read their load
1273 balancing information out of the networkstatus consensus rather than
1274 the individual router descriptors, addresses two potential anonymity
1275 issues, and fixes a variety of smaller issues.
1278 - Convert many internal address representations to optionally hold
1280 - Generate and accept IPv6 addresses in many protocol elements.
1281 - Make resolver code handle nameservers located at ipv6 addresses.
1282 - Begin implementation of proposal 121 ("Client authorization for
1283 hidden services"): configure hidden services with client
1284 authorization, publish descriptors for them, and configure
1285 authorization data for hidden services at clients. The next
1286 step is to actually access hidden services that perform client
1288 - More progress toward proposal 141: Network status consensus
1289 documents and votes now contain bandwidth information for each
1290 router and a summary of that router's exit policy. Eventually this
1291 will be used by clients so that they do not have to download every
1292 known descriptor before building circuits.
1294 o Major bugfixes (on 0.2.0.x and before):
1295 - When sending CREATED cells back for a given circuit, use a 64-bit
1296 connection ID to find the right connection, rather than an addr:port
1297 combination. Now that we can have multiple OR connections between
1298 the same ORs, it is no longer possible to use addr:port to uniquely
1299 identify a connection.
1300 - Relays now reject risky extend cells: if the extend cell includes
1301 a digest of all zeroes, or asks to extend back to the relay that
1302 sent the extend cell, tear down the circuit. Ideas suggested
1304 - If not enough of our entry guards are available so we add a new
1305 one, we might use the new one even if it overlapped with the
1306 current circuit's exit relay (or its family). Anonymity bugfix
1307 pointed out by rovv.
1310 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
1311 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
1312 - When using the TransPort option on OpenBSD, and using the User
1313 option to change UID and drop privileges, make sure to open /dev/pf
1314 before dropping privileges. Fixes bug 782. Patch from Christopher
1315 Davis. Bugfix on 0.1.2.1-alpha.
1316 - Correctly detect the presence of the linux/netfilter_ipv4.h header
1317 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
1318 - Add a missing safe_str() call for a debug log message.
1319 - Use 64 bits instead of 32 bits for connection identifiers used with
1320 the controller protocol, to greatly reduce risk of identifier reuse.
1321 - Make the autoconf script accept the obsolete --with-ssl-dir
1322 option as an alias for the actually-working --with-openssl-dir
1323 option. Fix the help documentation to recommend --with-openssl-dir.
1324 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
1327 - Rate-limit too-many-sockets messages: when they happen, they happen
1328 a lot. Resolves bug 748.
1329 - Resist DNS poisoning a little better by making sure that names in
1330 answer sections match.
1331 - Print the SOCKS5 error message string as well as the error code
1332 when a tor-resolve request fails. Patch from Jacob.
1335 Changes in version 0.2.1.4-alpha - 2008-08-04
1336 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
1339 - The address part of exit policies was not correctly written
1340 to router descriptors. This generated router descriptors that failed
1341 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
1343 - Tor triggered a false assert when extending a circuit to a relay
1344 but we already have a connection open to that relay. Noticed by
1345 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
1348 - Fix a hidden service logging bug: in some edge cases, the router
1349 descriptor of a previously picked introduction point becomes
1350 obsolete and we need to give up on it rather than continually
1351 complaining that it has become obsolete. Observed by xiando. Bugfix
1355 - Take out the TestVia config option, since it was a workaround for
1356 a bug that was fixed in Tor 0.1.1.21.
1359 Changes in version 0.2.1.3-alpha - 2008-08-03
1360 Tor 0.2.1.3-alpha implements most of the pieces to prevent
1361 infinite-length circuit attacks (see proposal 110); fixes a bug that
1362 might cause exit relays to corrupt streams they send back; allows
1363 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
1364 ExcludeExitNodes config options; and fixes a big pile of bugs.
1366 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
1367 - Send a bootstrap problem "warn" event on the first problem if the
1368 reason is NO_ROUTE (that is, our network is down).
1371 - Implement most of proposal 110: The first K cells to be sent
1372 along a circuit are marked as special "early" cells; only K "early"
1373 cells will be allowed. Once this code is universal, we can block
1374 certain kinds of DOS attack by requiring that EXTEND commands must
1375 be sent using an "early" cell.
1378 - Try to attach connections immediately upon receiving a RENDEZVOUS2
1379 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
1380 on the client side when connecting to a hidden service. Bugfix
1381 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
1382 - Ensure that two circuits can never exist on the same connection
1383 with the same circuit ID, even if one is marked for close. This
1384 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
1387 - When relays do their initial bandwidth measurement, don't limit
1388 to just our entry guards for the test circuits. Otherwise we tend
1389 to have multiple test circuits going through a single entry guard,
1390 which makes our bandwidth test less accurate. Fixes part of bug 654;
1391 patch contributed by Josh Albrecht.
1392 - Add an ExcludeExitNodes option so users can list a set of nodes
1393 that should be be excluded from the exit node position, but
1394 allowed elsewhere. Implements proposal 151.
1395 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
1396 ExcludeNodes and ExcludeExitNodes lists.
1397 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
1398 be more efficient. Formerly it was quadratic in the number of
1399 servers; now it should be linear. Fixes bug 509.
1400 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
1401 and n_conn_id_digest fields into a separate structure that's
1402 only needed when the circuit has not yet attached to an n_conn.
1405 - Change the contrib/tor.logrotate script so it makes the new
1406 logs as "_tor:_tor" rather than the default, which is generally
1407 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
1408 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1409 warnings (occasionally), but it can also cause the compiler to
1410 eliminate error-checking code. Suggested by Peter Gutmann.
1411 - When a hidden service is giving up on an introduction point candidate
1412 that was not included in the last published rendezvous descriptor,
1413 don't reschedule publication of the next descriptor. Fixes bug 763.
1415 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
1416 HiddenServiceExcludeNodes as obsolete: they never worked properly,
1417 and nobody claims to be using them. Fixes bug 754. Bugfix on
1418 0.1.0.1-rc. Patch from Christian Wilms.
1419 - Fix a small alignment and memory-wasting bug on buffer chunks.
1422 o Minor bugfixes (controller):
1423 - When closing an application-side connection because its circuit
1424 is getting torn down, generate the stream event correctly.
1425 Bugfix on 0.1.2.x. Anonymous patch.
1428 - Remove all backward-compatibility code to support relays running
1429 versions of Tor so old that they no longer work at all on the
1433 Changes in version 0.2.0.30 - 2008-07-15
1435 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1436 warnings (occasionally), but it can also cause the compiler to
1437 eliminate error-checking code. Suggested by Peter Gutmann.
1440 Changes in version 0.2.0.29-rc - 2008-07-08
1441 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
1442 hidden-service performance bugs, and fixes a bunch of smaller bugs.
1445 - If you have more than one bridge but don't know their keys,
1446 you would only launch a request for the descriptor of the first one
1447 on your list. (Tor considered launching requests for the others, but
1448 found that it already had a connection on the way for $0000...0000
1449 so it didn't open another.) Bugfix on 0.2.0.x.
1450 - If you have more than one bridge but don't know their keys, and the
1451 connection to one of the bridges failed, you would cancel all
1452 pending bridge connections. (After all, they all have the same
1453 digest.) Bugfix on 0.2.0.x.
1454 - When a hidden service was trying to establish an introduction point,
1455 and Tor had built circuits preemptively for such purposes, we
1456 were ignoring all the preemptive circuits and launching a new one
1457 instead. Bugfix on 0.2.0.14-alpha.
1458 - When a hidden service was trying to establish an introduction point,
1459 and Tor *did* manage to reuse one of the preemptively built
1460 circuits, it didn't correctly remember which one it used,
1461 so it asked for another one soon after, until there were no
1462 more preemptive circuits, at which point it launched one from
1463 scratch. Bugfix on 0.0.9.x.
1464 - Make directory servers include the X-Your-Address-Is: http header in
1465 their responses even for begin_dir conns. Now clients who only
1466 ever use begin_dir connections still have a way to learn their IP
1467 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
1470 - Fix a macro/CPP interaction that was confusing some compilers:
1471 some GCCs don't like #if/#endif pairs inside macro arguments.
1473 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
1474 Fixes bug 704; fix from Steven Murdoch.
1475 - When opening /dev/null in finish_daemonize(), do not pass the
1476 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
1477 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
1478 - Correctly detect transparent proxy support on Linux hosts that
1479 require in.h to be included before netfilter_ipv4.h. Patch
1481 - Disallow session resumption attempts during the renegotiation
1482 stage of the v2 handshake protocol. Clients should never be trying
1483 session resumption at this point, but apparently some did, in
1484 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
1485 found by Geoff Goodell.
1488 Changes in version 0.2.1.2-alpha - 2008-06-20
1489 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
1490 make it easier to set up your own private Tor network; fixes several
1491 big bugs with using more than one bridge relay; fixes a big bug with
1492 offering hidden services quickly after Tor starts; and uses a better
1493 API for reporting potential bootstrapping problems to the controller.
1496 - New TestingTorNetwork config option to allow adjustment of
1497 previously constant values that, while reasonable, could slow
1498 bootstrapping. Implements proposal 135. Patch from Karsten.
1501 - If you have more than one bridge but don't know their digests,
1502 you would only learn a request for the descriptor of the first one
1503 on your list. (Tor considered launching requests for the others, but
1504 found that it already had a connection on the way for $0000...0000
1505 so it didn't open another.) Bugfix on 0.2.0.x.
1506 - If you have more than one bridge but don't know their digests,
1507 and the connection to one of the bridges failed, you would cancel
1508 all pending bridge connections. (After all, they all have the
1509 same digest.) Bugfix on 0.2.0.x.
1510 - When establishing a hidden service, introduction points that
1511 originate from cannibalized circuits are completely ignored and not
1512 included in rendezvous service descriptors. This might be another
1513 reason for delay in making a hidden service available. Bugfix
1514 from long ago (0.0.9.x?)
1517 - Allow OpenSSL to use dynamic locks if it wants.
1518 - When building a consensus, do not include routers that are down.
1519 This will cut down 30% to 40% on consensus size. Implements
1521 - In directory authorities' approved-routers files, allow
1522 fingerprints with or without space.
1523 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
1524 controller can query our current bootstrap state in case it attaches
1525 partway through and wants to catch up.
1526 - Send an initial "Starting" bootstrap status event, so we have a
1527 state to start out in.
1530 - Asking for a conditional consensus at .../consensus/<fingerprints>
1531 would crash a dirserver if it did not already have a
1532 consensus. Bugfix on 0.2.1.1-alpha.
1533 - Clean up some macro/CPP interactions: some GCC versions don't like
1534 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
1537 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
1538 - Directory authorities shouldn't complain about bootstrapping
1539 problems just because they do a lot of reachability testing and
1540 some of the connection attempts fail.
1541 - Start sending "count" and "recommendation" key/value pairs in
1542 bootstrap problem status events, so the controller can hear about
1543 problems even before Tor decides they're worth reporting for sure.
1544 - If you're using bridges, generate "bootstrap problem" warnings
1545 as soon as you run out of working bridges, rather than waiting
1546 for ten failures -- which will never happen if you have less than
1548 - If we close our OR connection because there's been a circuit
1549 pending on it for too long, we were telling our bootstrap status
1550 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
1553 Changes in version 0.2.1.1-alpha - 2008-06-13
1554 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
1555 were making the Tor process bloat especially on Linux; makes our TLS
1556 handshake blend in better; sends "bootstrap phase" status events to
1557 the controller, so it can keep the user informed of progress (and
1558 problems) fetching directory information and establishing circuits;
1559 and adds a variety of smaller features.
1562 - More work on making our TLS handshake blend in: modify the list
1563 of ciphers advertised by OpenSSL in client mode to even more
1564 closely resemble a common web browser. We cheat a little so that
1565 we can advertise ciphers that the locally installed OpenSSL doesn't
1567 - Start sending "bootstrap phase" status events to the controller,
1568 so it can keep the user informed of progress fetching directory
1569 information and establishing circuits. Also inform the controller
1570 if we think we're stuck at a particular bootstrap phase. Implements
1572 - Resume using OpenSSL's RAND_poll() for better (and more portable)
1573 cross-platform entropy collection again. We used to use it, then
1574 stopped using it because of a bug that could crash systems that
1575 called RAND_poll when they had a lot of fds open. It looks like the
1576 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
1577 at startup, and to call RAND_poll() when we reseed later only if
1578 we have a non-buggy OpenSSL version.
1581 - When we choose to abandon a new entry guard because we think our
1582 older ones might be better, close any circuits pending on that
1583 new entry guard connection. This fix should make us recover much
1584 faster when our network is down and then comes back. Bugfix on
1585 0.1.2.8-beta; found by lodger.
1587 o Memory fixes and improvements:
1588 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
1589 to avoid unused RAM in buffer chunks and memory pools.
1590 - Speed up parsing and cut down on memory fragmentation by using
1591 stack-style allocations for parsing directory objects. Previously,
1592 this accounted for over 40% of allocations from within Tor's code
1593 on a typical directory cache.
1594 - Use a Bloom filter rather than a digest-based set to track which
1595 descriptors we need to keep around when we're cleaning out old
1596 router descriptors. This speeds up the computation significantly,
1597 and may reduce fragmentation.
1598 - Reduce the default smartlist size from 32 to 16; it turns out that
1599 most smartlists hold around 8-12 elements tops.
1600 - Make dumpstats() log the fullness and size of openssl-internal
1602 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
1603 patch to their OpenSSL, turn it on to save memory on servers. This
1604 patch will (with any luck) get included in a mainline distribution
1606 - Never use OpenSSL compression: it wastes RAM and CPU trying to
1607 compress cells, which are basically all encrypted, compressed,
1611 - Stop reloading the router list from disk for no reason when we
1612 run out of reachable directory mirrors. Once upon a time reloading
1613 it would set the 'is_running' flag back to 1 for them. It hasn't
1614 done that for a long time.
1615 - In very rare situations new hidden service descriptors were
1616 published earlier than 30 seconds after the last change to the
1617 service. (We currently think that a hidden service descriptor
1618 that's been stable for 30 seconds is worth publishing.)
1621 - Allow separate log levels to be configured for different logging
1622 domains. For example, this allows one to log all notices, warnings,
1623 or errors, plus all memory management messages of level debug or
1624 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
1625 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
1626 and stop using a warning that had become unfixably verbose under
1628 - New --hush command-line option similar to --quiet. While --quiet
1629 disables all logging to the console on startup, --hush limits the
1630 output to messages of warning and error severity.
1631 - Servers support a new URL scheme for consensus downloads that
1632 allows the client to specify which authorities are trusted.
1633 The server then only sends the consensus if the client will trust
1634 it. Otherwise a 404 error is sent back. Clients use this
1635 new scheme when the server supports it (meaning it's running
1636 0.2.1.1-alpha or later). Implements proposal 134.
1637 - New configure/torrc options (--enable-geoip-stats,
1638 DirRecordUsageByCountry) to record how many IPs we've served
1639 directory info to in each country code, how many status documents
1640 total we've sent to each country code, and what share of the total
1641 directory requests we should expect to see.
1642 - Use the TLS1 hostname extension to more closely resemble browser
1644 - Lots of new unit tests.
1645 - Add a macro to implement the common pattern of iterating through
1646 two parallel lists in lockstep.
1649 Changes in version 0.2.0.28-rc - 2008-06-13
1650 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
1651 performance bug, and fixes a bunch of smaller bugs.
1654 - Fix a bug where, when we were choosing the 'end stream reason' to
1655 put in our relay end cell that we send to the exit relay, Tor
1656 clients on Windows were sometimes sending the wrong 'reason'. The
1657 anonymity problem is that exit relays may be able to guess whether
1658 the client is running Windows, thus helping partition the anonymity
1659 set. Down the road we should stop sending reasons to exit relays,
1660 or otherwise prevent future versions of this bug.
1663 - While setting up a hidden service, some valid introduction circuits
1664 were overlooked and abandoned. This might be the reason for
1665 the long delay in making a hidden service available. Bugfix on
1669 - Update to the "June 9 2008" ip-to-country file.
1670 - Run 'make test' as part of 'make dist', so we stop releasing so
1671 many development snapshots that fail their unit tests.
1674 - When we're checking if we have enough dir info for each relay
1675 to begin establishing circuits, make sure that we actually have
1676 the descriptor listed in the consensus, not just any descriptor.
1678 - Bridge relays no longer print "xx=0" in their extrainfo document
1679 for every single country code in the geoip db. Bugfix on
1681 - Only warn when we fail to load the geoip file if we were planning to
1682 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
1683 - If we change our MaxAdvertisedBandwidth and then reload torrc,
1684 Tor won't realize it should publish a new relay descriptor. Fixes
1685 bug 688, reported by mfr. Bugfix on 0.1.2.x.
1686 - When we haven't had any application requests lately, don't bother
1687 logging that we have expired a bunch of descriptors. Bugfix
1689 - Make relay cells written on a connection count as non-padding when
1690 tracking how long a connection has been in use. Bugfix on
1691 0.2.0.1-alpha. Spotted by lodger.
1692 - Fix unit tests in 0.2.0.27-rc.
1693 - Fix compile on Windows.
1696 Changes in version 0.2.0.27-rc - 2008-06-03
1697 Tor 0.2.0.27-rc adds a few features we left out of the earlier
1698 release candidates. In particular, we now include an IP-to-country
1699 GeoIP database, so controllers can easily look up what country a
1700 given relay is in, and so bridge relays can give us some sanitized
1701 summaries about which countries are making use of bridges. (See proposal
1702 126-geoip-fetching.txt for details.)
1705 - Include an IP-to-country GeoIP file in the tarball, so bridge
1706 relays can report sanitized summaries of the usage they're seeing.
1709 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
1710 Robert Hogan. Fixes the first part of bug 681.
1711 - Make bridge authorities never serve extrainfo docs.
1712 - Add support to detect Libevent versions in the 1.4.x series
1714 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
1715 - Include a new contrib/tor-exit-notice.html file that exit relay
1716 operators can put on their website to help reduce abuse queries.
1719 - When tunneling an encrypted directory connection, and its first
1720 circuit fails, do not leave it unattached and ask the controller
1721 to deal. Fixes the second part of bug 681.
1722 - Make bridge authorities correctly expire old extrainfo documents
1726 Changes in version 0.2.0.26-rc - 2008-05-13
1727 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
1728 in Debian's OpenSSL packages. All users running any 0.2.0.x version
1729 should upgrade, whether they're running Debian or not.
1731 o Major security fixes:
1732 - Use new V3 directory authority keys on the tor26, gabelmoo, and
1733 moria1 V3 directory authorities. The old keys were generated with
1734 a vulnerable version of Debian's OpenSSL package, and must be
1735 considered compromised. Other authorities' keys were not generated
1736 with an affected version of OpenSSL.
1739 - List authority signatures as "unrecognized" based on DirServer
1740 lines, not on cert cache. Bugfix on 0.2.0.x.
1743 - Add a new V3AuthUseLegacyKey option to make it easier for
1744 authorities to change their identity keys if they have to.
1747 Changes in version 0.2.0.25-rc - 2008-04-23
1748 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
1751 - Remember to initialize threading before initializing logging.
1752 Otherwise, many BSD-family implementations will crash hard on
1753 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
1756 - Authorities correctly free policies on bad servers on
1757 exit. Fixes bug 672. Bugfix on 0.2.0.x.
1760 Changes in version 0.2.0.24-rc - 2008-04-22
1761 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
1762 v3 directory authority, makes relays with dynamic IP addresses and no
1763 DirPort notice more quickly when their IP address changes, fixes a few
1764 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
1766 o New directory authorities:
1767 - Take lefkada out of the list of v3 directory authorities, since
1768 it has been down for months.
1769 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
1773 - Detect address changes more quickly on non-directory mirror
1774 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
1776 o Minor features (security):
1777 - Reject requests for reverse-dns lookup of names that are in
1778 a private address space. Patch from lodger.
1779 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
1782 o Minor bugfixes (crashes):
1783 - Avoid a rare assert that can trigger when Tor doesn't have much
1784 directory information yet and it tries to fetch a v2 hidden
1785 service descriptor. Fixes bug 651, reported by nwf.
1786 - Initialize log mutex before initializing dmalloc. Otherwise,
1787 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
1788 - Use recursive pthread mutexes in order to avoid deadlock when
1789 logging debug-level messages to a controller. Bug spotted by nwf,
1790 bugfix on 0.2.0.16-alpha.
1792 o Minor bugfixes (resource management):
1793 - Keep address policies from leaking memory: start their refcount
1794 at 1, not 2. Bugfix on 0.2.0.16-alpha.
1795 - Free authority certificates on exit, so they don't look like memory
1796 leaks. Bugfix on 0.2.0.19-alpha.
1797 - Free static hashtables for policy maps and for TLS connections on
1798 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
1799 - Avoid allocating extra space when computing consensuses on 64-bit
1800 platforms. Bug spotted by aakova.
1802 o Minor bugfixes (misc):
1803 - Do not read the configuration file when we've only been told to
1804 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
1805 based on patch from Sebastian Hahn.
1806 - Exit relays that are used as a client can now reach themselves
1807 using the .exit notation, rather than just launching an infinite
1808 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
1809 - When attempting to open a logfile fails, tell us why.
1810 - Fix a dumb bug that was preventing us from knowing that we should
1811 preemptively build circuits to handle expected directory requests.
1812 Fixes bug 660. Bugfix on 0.1.2.x.
1813 - Warn less verbosely about clock skew from netinfo cells from
1814 untrusted sources. Fixes bug 663.
1815 - Make controller stream events for DNS requests more consistent,
1816 by adding "new stream" events for DNS requests, and removing
1817 spurious "stream closed" events" for cached reverse resolves.
1818 Patch from mwenge. Fixes bug 646.
1819 - Correctly notify one-hop connections when a circuit build has
1820 failed. Possible fix for bug 669. Found by lodger.
1823 Changes in version 0.2.0.23-rc - 2008-03-24
1824 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
1825 makes bootstrapping faster if the first directory mirror you contact
1826 is down. The bundles also include the new Vidalia 0.1.2 release.
1829 - When a tunneled directory request is made to a directory server
1830 that's down, notice after 30 seconds rather than 120 seconds. Also,
1831 fail any begindir streams that are pending on it, so they can
1832 retry elsewhere. This was causing multi-minute delays on bootstrap.
1835 Changes in version 0.2.0.22-rc - 2008-03-18
1836 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
1837 enables encrypted directory connections by default for non-relays, fixes
1838 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
1839 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
1842 - Enable encrypted directory connections by default for non-relays,
1843 so censor tools that block Tor directory connections based on their
1844 plaintext patterns will no longer work. This means Tor works in
1845 certain censored countries by default again.
1848 - Make sure servers always request certificates from clients during
1849 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
1850 - Do not enter a CPU-eating loop when a connection is closed in
1851 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
1852 diagnosed by lodger; bugfix on 0.2.0.20-rc.
1853 - Fix assertion failure that could occur when a blocked circuit
1854 became unblocked, and it had pending client DNS requests. Bugfix
1855 on 0.2.0.1-alpha. Fixes bug 632.
1857 o Minor bugfixes (on 0.1.2.x):
1858 - Generate "STATUS_SERVER" events rather than misspelled
1859 "STATUS_SEVER" events. Caught by mwenge.
1860 - When counting the number of bytes written on a TLS connection,
1861 look at the BIO actually used for writing to the network, not
1862 at the BIO used (sometimes) to buffer data for the network.
1863 Looking at different BIOs could result in write counts on the
1864 order of ULONG_MAX. Fixes bug 614.
1865 - On Windows, correctly detect errors when listing the contents of
1866 a directory. Fix from lodger.
1868 o Minor bugfixes (on 0.2.0.x):
1869 - Downgrade "sslv3 alert handshake failure" message to INFO.
1870 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
1871 left BandwidthRate and BandwidthBurst at the default, we would be
1872 silently limited by those defaults. Now raise them to match the
1873 RelayBandwidth* values.
1874 - Fix the SVK version detection logic to work correctly on a branch.
1875 - Make --enable-openbsd-malloc work correctly on Linux with alpha
1876 CPUs. Fixes bug 625.
1877 - Logging functions now check that the passed severity is sane.
1878 - Use proper log levels in the testsuite call of
1879 get_interface_address6().
1880 - When using a nonstandard malloc, do not use the platform values for
1881 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
1882 - Make the openbsd malloc code use 8k pages on alpha CPUs and
1884 - Detect mismatched page sizes when using --enable-openbsd-malloc.
1885 - Avoid double-marked-for-close warning when certain kinds of invalid
1886 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
1887 for bug 617. Bugfix on 0.2.0.1-alpha.
1888 - Make sure that the "NULL-means-reject *:*" convention is followed by
1889 all the policy manipulation functions, avoiding some possible crash
1890 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
1891 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
1892 actually works, and doesn't warn about every single reverse lookup.
1893 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
1896 - Only log guard node status when guard node status has changed.
1897 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
1898 make "INFO" 75% less verbose.
1901 Changes in version 0.2.0.21-rc - 2008-03-02
1902 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
1903 makes Tor work well with Vidalia again, fixes a rare assert bug,
1904 and fixes a pair of more minor bugs. The bundles also include Vidalia
1905 0.1.0 and Torbutton 1.1.16.
1908 - The control port should declare that it requires password auth
1909 when HashedControlSessionPassword is set too. Patch from Matt Edman;
1910 bugfix on 0.2.0.20-rc. Fixes bug 615.
1911 - Downgrade assert in connection_buckets_decrement() to a log message.
1912 This may help us solve bug 614, and in any case will make its
1913 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
1914 - We were sometimes miscounting the number of bytes read from the
1915 network, causing our rate limiting to not be followed exactly.
1916 Bugfix on 0.2.0.16-alpha. Reported by lodger.
1919 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
1920 OpenSSL versions should have been working fine. Diagnosis and patch
1921 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
1922 Bugfix on 0.2.0.20-rc.
1925 Changes in version 0.2.0.20-rc - 2008-02-24
1926 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
1927 makes more progress towards normalizing Tor's TLS handshake, makes
1928 hidden services work better again, helps relays bootstrap if they don't
1929 know their IP address, adds optional support for linking in openbsd's
1930 allocator or tcmalloc, allows really fast relays to scale past 15000
1931 sockets, and fixes a bunch of minor bugs reported by Veracode.
1934 - Enable the revised TLS handshake based on the one designed by
1935 Steven Murdoch in proposal 124, as revised in proposal 130. It
1936 includes version negotiation for OR connections as described in
1937 proposal 105. The new handshake is meant to be harder for censors
1938 to fingerprint, and it adds the ability to detect certain kinds of
1939 man-in-the-middle traffic analysis attacks. The version negotiation
1940 feature will allow us to improve Tor's link protocol more safely
1942 - Choose which bridge to use proportional to its advertised bandwidth,
1943 rather than uniformly at random. This should speed up Tor for
1944 bridge users. Also do this for people who set StrictEntryNodes.
1945 - When a TrackHostExits-chosen exit fails too many times in a row,
1946 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
1949 - Resolved problems with (re-)fetching hidden service descriptors.
1950 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
1952 - If we only ever used Tor for hidden service lookups or posts, we
1953 would stop building circuits and start refusing connections after
1954 24 hours, since we falsely believed that Tor was dormant. Reported
1955 by nwf; bugfix on 0.1.2.x.
1956 - Servers that don't know their own IP address should go to the
1957 authorities for their first directory fetch, even if their DirPort
1958 is off or if they don't know they're reachable yet. This will help
1959 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
1960 - When counting the number of open sockets, count not only the number
1961 of sockets we have received from the socket() call, but also
1962 the number we've gotten from accept() and socketpair(). This bug
1963 made us fail to count all sockets that we were using for incoming
1964 connections. Bugfix on 0.2.0.x.
1965 - Fix code used to find strings within buffers, when those strings
1966 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
1967 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
1968 - Add a new __HashedControlSessionPassword option for controllers
1969 to use for one-off session password hashes that shouldn't get
1970 saved to disk by SAVECONF --- Vidalia users were accumulating a
1971 pile of HashedControlPassword lines in their torrc files, one for
1972 each time they had restarted Tor and then clicked Save. Make Tor
1973 automatically convert "HashedControlPassword" to this new option but
1974 only when it's given on the command line. Partial fix for bug 586.
1976 o Minor features (performance):
1977 - Tune parameters for cell pool allocation to minimize amount of
1979 - Add OpenBSD malloc code from phk as an optional malloc
1980 replacement on Linux: some glibc libraries do very poorly
1981 with Tor's memory allocation patterns. Pass
1982 --enable-openbsd-malloc to get the replacement malloc code.
1983 - Add a --with-tcmalloc option to the configure script to link
1984 against tcmalloc (if present). Does not yet search for
1985 non-system include paths.
1986 - Stop imposing an arbitrary maximum on the number of file descriptors
1987 used for busy servers. Bug reported by Olaf Selke; patch from
1990 o Minor features (other):
1991 - When SafeLogging is disabled, log addresses along with all TLS
1993 - When building with --enable-gcc-warnings, check for whether Apple's
1994 warning "-Wshorten-64-to-32" is available.
1995 - Add a --passphrase-fd argument to the tor-gencert command for
1998 o Minor bugfixes (memory leaks and code problems):
1999 - We were leaking a file descriptor if Tor started with a zero-length
2000 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
2001 - Detect size overflow in zlib code. Reported by Justin Ferguson and
2003 - We were comparing the raw BridgePassword entry with a base64'ed
2004 version of it, when handling a "/tor/networkstatus-bridges"
2005 directory request. Now compare correctly. Noticed by Veracode.
2006 - Recover from bad tracked-since value in MTBF-history file.
2008 - Alter the code that tries to recover from unhandled write
2009 errors, to not try to flush onto a socket that's given us
2010 unhandled errors. Bugfix on 0.1.2.x.
2011 - Make Unix controlsockets work correctly on OpenBSD. Patch from
2012 tup. Bugfix on 0.2.0.3-alpha.
2014 o Minor bugfixes (other):
2015 - If we have an extra-info document for our server, always make
2016 it available on the control port, even if we haven't gotten
2017 a copy of it from an authority yet. Patch from mwenge.
2018 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
2019 - Directory mirrors no longer include a guess at the client's IP
2020 address if the connection appears to be coming from the same /24
2021 network; it was producing too many wrong guesses.
2022 - Make the new hidden service code respect the SafeLogging setting.
2023 Bugfix on 0.2.0.x. Patch from Karsten.
2024 - When starting as an authority, do not overwrite all certificates
2025 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
2026 - If we're trying to flush the last bytes on a connection (for
2027 example, when answering a directory request), reset the
2028 time-to-give-up timeout every time we manage to write something
2029 on the socket. Bugfix on 0.1.2.x.
2030 - Change the behavior of "getinfo status/good-server-descriptor"
2031 so it doesn't return failure when any authority disappears.
2032 - Even though the man page said that "TrackHostExits ." should
2033 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
2034 - Report TLS "zero return" case as a "clean close" and "IO error"
2035 as a "close". Stop calling closes "unexpected closes": existing
2036 Tors don't use SSL_close(), so having a connection close without
2037 the TLS shutdown handshake is hardly unexpected.
2038 - Send NAMESERVER_STATUS messages for a single failed nameserver
2041 o Code simplifications and refactoring:
2042 - Remove the tor_strpartition function: its logic was confused,
2043 and it was only used for one thing that could be implemented far
2047 Changes in version 0.2.0.19-alpha - 2008-02-09
2048 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
2049 handshake, makes path selection for relays more secure and IP address
2050 guessing more robust, and generally fixes a lot of bugs in preparation
2051 for calling the 0.2.0 branch stable.
2054 - Do not include recognizeable strings in the commonname part of
2055 Tor's x509 certificates.
2058 - If we're a relay, avoid picking ourselves as an introduction point,
2059 a rendezvous point, or as the final hop for internal circuits. Bug
2060 reported by taranis and lodger. Bugfix on 0.1.2.x.
2061 - Patch from "Andrew S. Lists" to catch when we contact a directory
2062 mirror at IP address X and he says we look like we're coming from
2063 IP address X. Bugfix on 0.1.2.x.
2065 o Minor features (security):
2066 - Be more paranoid about overwriting sensitive memory on free(),
2067 as a defensive programming tactic to ensure forward secrecy.
2069 o Minor features (directory authority):
2070 - Actually validate the options passed to AuthDirReject,
2071 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
2072 - Reject router descriptors with out-of-range bandwidthcapacity or
2073 bandwidthburst values.
2075 o Minor features (controller):
2076 - Reject controller commands over 1MB in length. This keeps rogue
2077 processes from running us out of memory.
2079 o Minor features (misc):
2080 - Give more descriptive well-formedness errors for out-of-range
2081 hidden service descriptor/protocol versions.
2082 - Make memory debugging information describe more about history
2083 of cell allocation, so we can help reduce our memory use.
2085 o Deprecated features (controller):
2086 - The status/version/num-versioning and status/version/num-concurring
2087 GETINFO options are no longer useful in the v3 directory protocol:
2088 treat them as deprecated, and warn when they're used.
2091 - When our consensus networkstatus has been expired for a while, stop
2092 being willing to build circuits using it. Fixes bug 401. Bugfix
2094 - Directory caches now fetch certificates from all authorities
2095 listed in a networkstatus consensus, even when they do not
2096 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
2097 - When connecting to a bridge without specifying its key, insert
2098 the connection into the identity-to-connection map as soon as
2099 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
2100 - Detect versions of OS X where malloc_good_size() is present in the
2101 library but never actually declared. Resolves bug 587. Bugfix
2103 - Stop incorrectly truncating zlib responses to directory authority
2104 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
2105 - Stop recommending that every server operator send mail to tor-ops.
2106 Resolves bug 597. Bugfix on 0.1.2.x.
2107 - Don't trigger an assert if we start a directory authority with a
2108 private IP address (like 127.0.0.1).
2109 - Avoid possible failures when generating a directory with routers
2110 with over-long versions strings, or too many flags set. Bugfix
2112 - If an attempt to launch a DNS resolve request over the control
2113 port fails because we have overrun the limit on the number of
2114 connections, tell the controller that the request has failed.
2115 - Avoid using too little bandwidth when our clock skips a few
2116 seconds. Bugfix on 0.1.2.x.
2117 - Fix shell error when warning about missing packages in configure
2118 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
2119 - Do not become confused when receiving a spurious VERSIONS-like
2120 cell from a confused v1 client. Bugfix on 0.2.0.x.
2121 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
2122 introduction points for a hidden service have failed. Patch from
2123 Karsten Loesing. Bugfix on 0.2.0.x.
2125 o Code simplifications and refactoring:
2126 - Remove some needless generality from cpuworker code, for improved
2128 - Stop overloading the circuit_t.onionskin field for both "onionskin
2129 from a CREATE cell that we are waiting for a cpuworker to be
2130 assigned" and "onionskin from an EXTEND cell that we are going to
2131 send to an OR as soon as we are connected". Might help with bug 600.
2132 - Add an in-place version of aes_crypt() so that we can avoid doing a
2133 needless memcpy() call on each cell payload.
2136 Changes in version 0.2.0.18-alpha - 2008-01-25
2137 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
2138 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
2139 that can warn or reject connections to ports generally associated with
2140 vulnerable-plaintext protocols.
2142 o New directory authorities:
2143 - Set up dannenberg (run by CCC) as the sixth v3 directory
2147 - Fix a major memory leak when attempting to use the v2 TLS
2148 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
2149 - We accidentally enabled the under-development v2 TLS handshake
2150 code, which was causing log entries like "TLS error while
2151 renegotiating handshake". Disable it again. Resolves bug 590.
2152 - We were computing the wrong Content-Length: header for directory
2153 responses that need to be compressed on the fly, causing clients
2154 asking for those items to always fail. Bugfix on 0.2.0.x; partially
2158 - Avoid going directly to the directory authorities even if you're a
2159 relay, if you haven't found yourself reachable yet or if you've
2160 decided not to advertise your dirport yet. Addresses bug 556.
2161 - If we've gone 12 hours since our last bandwidth check, and we
2162 estimate we have less than 50KB bandwidth capacity but we could
2163 handle more, do another bandwidth test.
2164 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
2165 Tor can warn and/or refuse connections to ports commonly used with
2166 vulnerable-plaintext protocols. Currently we warn on ports 23,
2167 109, 110, and 143, but we don't reject any.
2170 - When we setconf ClientOnly to 1, close any current OR and Dir
2171 listeners. Reported by mwenge.
2172 - When we get a consensus that's been signed by more people than
2173 we expect, don't log about it; it's not a big deal. Reported
2177 - Don't answer "/tor/networkstatus-bridges" directory requests if
2178 the request isn't encrypted.
2179 - Make "ClientOnly 1" config option disable directory ports too.
2180 - Patches from Karsten Loesing to make v2 hidden services more
2181 robust: work even when there aren't enough HSDir relays available;
2182 retry when a v2 rend desc fetch fails; but don't retry if we
2183 already have a usable v0 rend desc.
2186 Changes in version 0.2.0.17-alpha - 2008-01-17
2187 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
2190 - Make the tor-gencert man page get included correctly in the tarball.
2193 Changes in version 0.2.0.16-alpha - 2008-01-17
2194 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
2195 Loesing, and generally cleans up a lot of features and minor bugs.
2197 o New directory authorities:
2198 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
2201 o Major performance improvements:
2202 - Switch our old ring buffer implementation for one more like that
2203 used by free Unix kernels. The wasted space in a buffer with 1mb
2204 of data will now be more like 8k than 1mb. The new implementation
2205 also avoids realloc();realloc(); patterns that can contribute to
2206 memory fragmentation.
2209 - Configuration files now accept C-style strings as values. This
2210 helps encode characters not allowed in the current configuration
2211 file format, such as newline or #. Addresses bug 557.
2212 - Although we fixed bug 539 (where servers would send HTTP status 503
2213 responses _and_ send a body too), there are still servers out
2214 there that haven't upgraded. Therefore, make clients parse such
2215 bodies when they receive them.
2216 - When we're not serving v2 directory information, there is no reason
2217 to actually keep any around. Remove the obsolete files and directory
2218 on startup if they are very old and we aren't going to serve them.
2220 o Minor performance improvements:
2221 - Reference-count and share copies of address policy entries; only 5%
2222 of them were actually distinct.
2223 - Never walk through the list of logs if we know that no log is
2224 interested in a given message.
2227 - When an authority has not signed a consensus, do not try to
2228 download a nonexistent "certificate with key 00000000". Bugfix
2229 on 0.2.0.x. Fixes bug 569.
2230 - Fix a rare assert error when we're closing one of our threads:
2231 use a mutex to protect the list of logs, so we never write to the
2232 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
2233 bug 575, which is kind of the revenge of bug 222.
2234 - Patch from Karsten Loesing to complain less at both the client
2235 and the relay when a relay used to have the HSDir flag but doesn't
2236 anymore, and we try to upload a hidden service descriptor.
2237 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
2239 - Do not try to download missing certificates until we have tried
2240 to check our fallback consensus. Fixes bug 583.
2241 - Make bridges round reported GeoIP stats info up to the nearest
2242 estimate, not down. Now we can distinguish between "0 people from
2243 this country" and "1 person from this country".
2244 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
2245 - Avoid possible segfault if key generation fails in
2246 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
2247 - Avoid segfault in the case where a badly behaved v2 versioning
2248 directory sends a signed networkstatus with missing client-versions.
2250 - Avoid segfaults on certain complex invocations of
2251 router_get_by_hexdigest(). Bugfix on 0.1.2.
2252 - Correct bad index on array access in parse_http_time(). Bugfix
2254 - Fix possible bug in vote generation when server versions are present
2255 but client versions are not.
2256 - Fix rare bug on REDIRECTSTREAM control command when called with no
2257 port set: it could erroneously report an error when none had
2259 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
2260 compressing large objects and find ourselves with more than 4k
2261 left over. Bugfix on 0.2.0.
2262 - Fix a small memory leak when setting up a hidden service.
2263 - Fix a few memory leaks that could in theory happen under bizarre
2265 - Fix an assert if we post a general-purpose descriptor via the
2266 control port but that descriptor isn't mentioned in our current
2267 network consensus. Bug reported by Jon McLachlan; bugfix on
2270 o Minor features (controller):
2271 - Get NS events working again. Patch from tup.
2272 - The GETCONF command now escapes and quotes configuration values
2273 that don't otherwise fit into the torrc file.
2274 - The SETCONF command now handles quoted values correctly.
2276 o Minor features (directory authorities):
2277 - New configuration options to override default maximum number of
2278 servers allowed on a single IP address. This is important for
2279 running a test network on a single host.
2280 - Actually implement the -s option to tor-gencert.
2281 - Add a manual page for tor-gencert.
2283 o Minor features (bridges):
2284 - Bridge authorities no longer serve bridge descriptors over
2285 unencrypted connections.
2287 o Minor features (other):
2288 - Add hidden services and DNSPorts to the list of things that make
2289 Tor accept that it has running ports. Change starting Tor with no
2290 ports from a fatal error to a warning; we might change it back if
2291 this turns out to confuse anybody. Fixes bug 579.
2294 Changes in version 0.1.2.19 - 2008-01-17
2295 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
2296 exit policy a little bit more conservative so it's safer to run an
2297 exit relay on a home system, and fixes a variety of smaller issues.
2300 - Exit policies now reject connections that are addressed to a
2301 relay's public (external) IP address too, unless
2302 ExitPolicyRejectPrivate is turned off. We do this because too
2303 many relays are running nearby to services that trust them based
2307 - When the clock jumps forward a lot, do not allow the bandwidth
2308 buckets to become negative. Fixes bug 544.
2309 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2310 on every successful resolve. Reported by Mike Perry.
2311 - Purge old entries from the "rephist" database and the hidden
2312 service descriptor database even when DirPort is zero.
2313 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
2314 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
2315 crashing or mis-answering these requests.
2316 - When we decide to send a 503 response to a request for servers, do
2317 not then also send the server descriptors: this defeats the whole
2318 purpose. Fixes bug 539.
2321 - Changing the ExitPolicyRejectPrivate setting should cause us to
2322 rebuild our server descriptor.
2323 - Fix handling of hex nicknames when answering controller requests for
2324 networkstatus by name, or when deciding whether to warn about
2325 unknown routers in a config option. (Patch from mwenge.)
2326 - Fix a couple of hard-to-trigger autoconf problems that could result
2327 in really weird results on platforms whose sys/types.h files define
2328 nonstandard integer types.
2329 - Don't try to create the datadir when running --verify-config or
2330 --hash-password. Resolves bug 540.
2331 - If we were having problems getting a particular descriptor from the
2332 directory caches, and then we learned about a new descriptor for
2333 that router, we weren't resetting our failure count. Reported
2335 - Although we fixed bug 539 (where servers would send HTTP status 503
2336 responses _and_ send a body too), there are still servers out there
2337 that haven't upgraded. Therefore, make clients parse such bodies
2338 when they receive them.
2339 - Run correctly on systems where rlim_t is larger than unsigned long.
2340 This includes some 64-bit systems.
2341 - Run correctly on platforms (like some versions of OS X 10.5) where
2342 the real limit for number of open files is OPEN_FILES, not rlim_max
2343 from getrlimit(RLIMIT_NOFILES).
2344 - Avoid a spurious free on base64 failure.
2345 - Avoid segfaults on certain complex invocations of
2346 router_get_by_hexdigest().
2347 - Fix rare bug on REDIRECTSTREAM control command when called with no
2348 port set: it could erroneously report an error when none had
2352 Changes in version 0.2.0.15-alpha - 2007-12-25
2353 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
2354 features added in 0.2.0.13-alpha.
2357 - Fix several remotely triggerable asserts based on DirPort requests
2358 for a v2 or v3 networkstatus object before we were prepared. This
2359 was particularly bad for 0.2.0.13 and later bridge relays, who
2360 would never have a v2 networkstatus and would thus always crash
2361 when used. Bugfixes on 0.2.0.x.
2362 - Estimate the v3 networkstatus size more accurately, rather than
2363 estimating it at zero bytes and giving it artificially high priority
2364 compared to other directory requests. Bugfix on 0.2.0.x.
2367 - Fix configure.in logic for cross-compilation.
2368 - When we load a bridge descriptor from the cache, and it was
2369 previously unreachable, mark it as retriable so we won't just
2370 ignore it. Also, try fetching a new copy immediately. Bugfixes
2372 - The bridge GeoIP stats were counting other relays, for example
2373 self-reachability and authority-reachability tests.
2376 - Support compilation to target iPhone; patch from cjacker huang.
2377 To build for iPhone, pass the --enable-iphone option to configure.
2380 Changes in version 0.2.0.14-alpha - 2007-12-23
2382 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
2383 without a datadirectory from a previous Tor install. Reported
2385 - Fix a crash when we fetch a descriptor that turns out to be
2386 unexpected (it used to be in our networkstatus when we started
2387 fetching it, but it isn't in our current networkstatus), and we
2388 aren't using bridges. Bugfix on 0.2.0.x.
2389 - Fix a crash when accessing hidden services: it would work the first
2390 time you use a given introduction point for your service, but
2391 on subsequent requests we'd be using garbage memory. Fixed by
2392 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
2393 - Fix a crash when we load a bridge descriptor from disk but we don't
2394 currently have a Bridge line for it in our torrc. Bugfix on
2398 - If bridge authorities set BridgePassword, they will serve a
2399 snapshot of known bridge routerstatuses from their DirPort to
2400 anybody who knows that password. Unset by default.
2403 - Make the unit tests build again.
2404 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
2405 - Make PublishServerDescriptor default to 1, so the default doesn't
2406 have to change as we invent new directory protocol versions.
2407 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
2408 be included unless sys/time.h is already included. Fixes
2409 bug 553. Bugfix on 0.2.0.x.
2410 - If we receive a general-purpose descriptor and then receive an
2411 identical bridge-purpose descriptor soon after, don't discard
2412 the next one as a duplicate.
2415 - If BridgeRelay is set to 1, then the default for
2416 PublishServerDescriptor is now "bridge" rather than "v2,v3".
2417 - If the user sets RelayBandwidthRate but doesn't set
2418 RelayBandwidthBurst, then make them equal rather than erroring out.
2421 Changes in version 0.2.0.13-alpha - 2007-12-21
2422 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
2423 Goodell, fixes many more bugs, and adds a lot of infrastructure for
2426 o New directory authorities:
2427 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
2431 - Only update guard status (usable / not usable) once we have
2432 enough directory information. This was causing us to always pick
2433 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
2434 causing us to discard all our guards on startup if we hadn't been
2435 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
2436 - Purge old entries from the "rephist" database and the hidden
2437 service descriptor databases even when DirPort is zero. Bugfix
2439 - We were ignoring our RelayBandwidthRate for the first 30 seconds
2440 after opening a circuit -- even a relayed circuit. Bugfix on
2442 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
2443 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
2444 crashing or mis-answering these types of requests.
2445 - Relays were publishing their server descriptor to v1 and v2
2446 directory authorities, but they didn't try publishing to v3-only
2447 authorities. Fix this; and also stop publishing to v1 authorities.
2449 - When we were reading router descriptors from cache, we were ignoring
2450 the annotations -- so for example we were reading in bridge-purpose
2451 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
2452 - When we decided to send a 503 response to a request for servers, we
2453 were then also sending the server descriptors: this defeats the
2454 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
2457 - Bridge relays now behave like clients with respect to time
2458 intervals for downloading new consensus documents -- otherwise they
2459 stand out. Bridge users now wait until the end of the interval,
2460 so their bridge relay will be sure to have a new consensus document.
2461 - Three new config options (AlternateDirAuthority,
2462 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
2463 user selectively replace the default directory authorities by type,
2464 rather than the all-or-nothing replacement that DirServer offers.
2465 - Tor can now be configured to read a GeoIP file from disk in one
2466 of two formats. This can be used by controllers to map IP addresses
2467 to countries. Eventually, it may support exit-by-country.
2468 - When possible, bridge relays remember which countries users
2469 are coming from, and report aggregate information in their
2470 extra-info documents, so that the bridge authorities can learn
2471 where Tor is blocked.
2472 - Bridge directory authorities now do reachability testing on the
2473 bridges they know. They provide router status summaries to the
2474 controller via "getinfo ns/purpose/bridge", and also dump summaries
2475 to a file periodically.
2476 - Stop fetching directory info so aggressively if your DirPort is
2477 on but your ORPort is off; stop fetching v2 dir info entirely.
2478 You can override these choices with the new FetchDirInfoEarly
2482 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
2483 consensus documents when there are too many relays at a single
2484 IP address. Now clear it in v2 network status documents too, and
2485 also clear it in routerinfo_t when the relay is no longer listed
2486 in the relevant networkstatus document.
2487 - Don't crash if we get an unexpected value for the
2488 PublishServerDescriptor config option. Reported by Matt Edman;
2489 bugfix on 0.2.0.9-alpha.
2490 - Our new v2 hidden service descriptor format allows descriptors
2491 that have no introduction points. But Tor crashed when we tried
2492 to build a descriptor with no intro points (and it would have
2493 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
2495 - Fix building with dmalloc 5.5.2 with glibc.
2496 - Reject uploaded descriptors and extrainfo documents if they're
2497 huge. Otherwise we'll cache them all over the network and it'll
2498 clog everything up. Reported by Aljosha Judmayer.
2499 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
2500 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
2501 - When the DANGEROUS_VERSION controller status event told us we're
2502 running an obsolete version, it used the string "OLD" to describe
2503 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
2504 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
2505 - If we can't expand our list of entry guards (e.g. because we're
2506 using bridges or we have StrictEntryNodes set), don't mark relays
2507 down when they fail a directory request. Otherwise we're too quick
2508 to mark all our entry points down. Bugfix on 0.1.2.x.
2509 - Fix handling of hex nicknames when answering controller requests for
2510 networkstatus by name, or when deciding whether to warn about unknown
2511 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
2512 - Fix a couple of hard-to-trigger autoconf problems that could result
2513 in really weird results on platforms whose sys/types.h files define
2514 nonstandard integer types. Bugfix on 0.1.2.x.
2515 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
2516 - Don't crash on name lookup when we have no current consensus. Fixes
2517 bug 538; bugfix on 0.2.0.x.
2518 - Only Tors that want to mirror the v2 directory info should
2519 create the "cached-status" directory in their datadir. (All Tors
2520 used to create it.) Bugfix on 0.2.0.9-alpha.
2521 - Directory authorities should only automatically download Extra Info
2522 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
2525 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
2526 consumers. (We already do this on HUP.)
2527 - Authorities and caches fetch the v2 networkstatus documents
2528 less often, now that v3 is encouraged.
2529 - Add a new config option BridgeRelay that specifies you want to
2530 be a bridge relay. Right now the only difference is that it makes
2531 you answer begin_dir requests, and it makes you cache dir info,
2532 even if your DirPort isn't on.
2533 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
2534 ask about source, timestamp of arrival, purpose, etc. We need
2535 something like this to help Vidalia not do GeoIP lookups on bridge
2537 - Allow multiple HashedControlPassword config lines, to support
2538 multiple controller passwords.
2539 - Authorities now decide whether they're authoritative for a given
2540 router based on the router's purpose.
2541 - New config options AuthDirBadDir and AuthDirListBadDirs for
2542 authorities to mark certain relays as "bad directories" in the
2543 networkstatus documents. Also supports the "!baddir" directive in
2544 the approved-routers file.
2547 Changes in version 0.2.0.12-alpha - 2007-11-16
2548 This twelfth development snapshot fixes some more build problems as
2549 well as a few minor bugs.
2552 - Make it build on OpenBSD again. Patch from tup.
2553 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
2554 package-building for Red Hat, OS X, etc.
2556 o Minor bugfixes (on 0.1.2.x):
2557 - Changing the ExitPolicyRejectPrivate setting should cause us to
2558 rebuild our server descriptor.
2560 o Minor bugfixes (on 0.2.0.x):
2561 - When we're lacking a consensus, don't try to perform rendezvous
2562 operations. Reported by Karsten Loesing.
2563 - Fix a small memory leak whenever we decide against using a
2564 newly picked entry guard. Reported by Mike Perry.
2565 - When authorities detected more than two relays running on the same
2566 IP address, they were clearing all the status flags but forgetting
2567 to clear the "hsdir" flag. So clients were being told that a
2568 given relay was the right choice for a v2 hsdir lookup, yet they
2569 never had its descriptor because it was marked as 'not running'
2571 - If we're trying to fetch a bridge descriptor and there's no way
2572 the bridge authority could help us (for example, we don't know
2573 a digest, or there is no bridge authority), don't be so eager to
2574 fall back to asking the bridge authority.
2575 - If we're using bridges or have strictentrynodes set, and our
2576 chosen exit is in the same family as all our bridges/entry guards,
2577 then be flexible about families.
2580 - When we negotiate a v2 link-layer connection (not yet implemented),
2581 accept RELAY_EARLY cells and turn them into RELAY cells if we've
2582 negotiated a v1 connection for their next step. Initial code for
2586 Changes in version 0.2.0.11-alpha - 2007-11-12
2587 This eleventh development snapshot fixes some build problems with
2588 the previous snapshot. It also includes a more secure-by-default exit
2589 policy for relays, fixes an enormous memory leak for exit relays, and
2590 fixes another bug where servers were falling out of the directory list.
2593 - Exit policies now reject connections that are addressed to a
2594 relay's public (external) IP address too, unless
2595 ExitPolicyRejectPrivate is turned off. We do this because too
2596 many relays are running nearby to services that trust them based
2597 on network address. Bugfix on 0.1.2.x.
2600 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2601 on every successful resolve. Reported by Mike Perry; bugfix
2603 - On authorities, never downgrade to old router descriptors simply
2604 because they're listed in the consensus. This created a catch-22
2605 where we wouldn't list a new descriptor because there was an
2606 old one in the consensus, and we couldn't get the new one in the
2607 consensus because we wouldn't list it. Possible fix for bug 548.
2608 Also, this might cause bug 543 to appear on authorities; if so,
2609 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
2611 o Packaging fixes on 0.2.0.10-alpha:
2612 - We were including instructions about what to do with the
2613 src/config/fallback-consensus file, but we weren't actually
2614 including it in the tarball. Disable all of that for now.
2617 - Allow people to say PreferTunnelledDirConns rather than
2618 PreferTunneledDirConns, for those alternate-spellers out there.
2621 - Don't reevaluate all the information from our consensus document
2622 just because we've downloaded a v2 networkstatus that we intend
2623 to cache. Fixes bug 545; bugfix on 0.2.0.x.
2626 Changes in version 0.2.0.10-alpha - 2007-11-10
2627 This tenth development snapshot adds a third v3 directory authority
2628 run by Mike Perry, adds most of Karsten Loesing's new hidden service
2629 descriptor format, fixes a bad crash bug and new bridge bugs introduced
2630 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
2631 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
2632 addresses many more minor issues.
2634 o New directory authorities:
2635 - Set up ides (run by Mike Perry) as the third v3 directory authority.
2638 - Allow tunnelled directory connections to ask for an encrypted
2639 "begin_dir" connection or an anonymized "uses a full Tor circuit"
2640 connection independently. Now we can make anonymized begin_dir
2641 connections for (e.g.) more secure hidden service posting and
2643 - More progress on proposal 114: code from Karsten Loesing to
2644 implement new hidden service descriptor format.
2645 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
2646 accommodate the growing number of servers that use the default
2647 and are reaching it.
2648 - Directory authorities use a new formula for selecting which nodes
2649 to advertise as Guards: they must be in the top 7/8 in terms of
2650 how long we have known about them, and above the median of those
2651 nodes in terms of weighted fractional uptime.
2652 - Make "not enough dir info yet" warnings describe *why* Tor feels
2653 it doesn't have enough directory info yet.
2656 - Stop servers from crashing if they set a Family option (or
2657 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
2659 - Make bridge users work again -- the move to v3 directories in
2660 0.2.0.9-alpha had introduced a number of bugs that made bridges
2661 no longer work for clients.
2662 - When the clock jumps forward a lot, do not allow the bandwidth
2663 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
2665 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
2666 - When the consensus lists a router descriptor that we previously were
2667 mirroring, but that we considered non-canonical, reload the
2668 descriptor as canonical. This fixes bug 543 where Tor servers
2669 would start complaining after a few days that they don't have
2670 enough directory information to build a circuit.
2671 - Consider replacing the current consensus when certificates arrive
2672 that make the pending consensus valid. Previously, we were only
2673 considering replacement when the new certs _didn't_ help.
2674 - Fix an assert error on startup if we didn't already have the
2675 consensus and certs cached in our datadirectory: we were caching
2676 the consensus in consensus_waiting_for_certs but then free'ing it
2678 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
2679 Request) if we need more v3 certs but we've already got pending
2680 requests for all of them.
2681 - Correctly back off from failing certificate downloads. Fixes
2683 - Authorities don't vote on the Running flag if they have been running
2684 for less than 30 minutes themselves. Fixes bug 547, where a newly
2685 started authority would vote that everyone was down.
2688 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
2689 it, it had no AES, and it hasn't seen any security patches since
2693 - Clients now hold circuitless TLS connections open for 1.5 times
2694 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
2695 rebuild a new circuit over them within that timeframe. Previously,
2696 they held them open only for KeepalivePeriod (5 minutes).
2697 - Use "If-Modified-Since" to avoid retrieving consensus
2698 networkstatuses that we already have.
2699 - When we have no consensus, check FallbackNetworkstatusFile (defaults
2700 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
2701 we start knowing some directory caches.
2702 - When we receive a consensus from the future, warn about skew.
2703 - Improve skew reporting: try to give the user a better log message
2704 about how skewed they are, and how much this matters.
2705 - When we have a certificate for an authority, believe that
2706 certificate's claims about the authority's IP address.
2707 - New --quiet command-line option to suppress the default console log.
2708 Good in combination with --hash-password.
2709 - Authorities send back an X-Descriptor-Not-New header in response to
2710 an accepted-but-discarded descriptor upload. Partially implements
2712 - Make the log message for "tls error. breaking." more useful.
2713 - Better log messages about certificate downloads, to attempt to
2714 track down the second incarnation of bug 546.
2716 o Minor features (bridges):
2717 - If bridge users set UpdateBridgesFromAuthority, but the digest
2718 they ask for is a 404 from the bridge authority, they now fall
2719 back to trying the bridge directly.
2720 - Bridges now use begin_dir to publish their server descriptor to
2721 the bridge authority, even when they haven't set TunnelDirConns.
2723 o Minor features (controller):
2724 - When reporting clock skew, and we know that the clock is _at least
2725 as skewed_ as some value, but we don't know the actual value,
2726 report the value as a "minimum skew."
2729 - Update linux-tor-prio.sh script to allow QoS based on the uid of
2730 the Tor process. Patch from Marco Bonetti with tweaks from Mike
2734 - Refuse to start if both ORPort and UseBridges are set. Bugfix
2735 on 0.2.0.x, suggested by Matt Edman.
2736 - Don't stop fetching descriptors when FetchUselessDescriptors is
2737 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
2738 reported by tup and ioerror.
2739 - Better log message on vote from unknown authority.
2740 - Don't log "Launching 0 request for 0 router" message.
2742 o Minor bugfixes (memory leaks):
2743 - Stop leaking memory every time we parse a v3 certificate. Bugfix
2745 - Stop leaking memory every time we load a v3 certificate. Bugfix
2746 on 0.2.0.1-alpha. Fixes bug 536.
2747 - Stop leaking a cached networkstatus on exit. Bugfix on
2749 - Stop leaking voter information every time we free a consensus.
2750 Bugfix on 0.2.0.3-alpha.
2751 - Stop leaking signed data every time we check a voter signature.
2752 Bugfix on 0.2.0.3-alpha.
2753 - Stop leaking a signature every time we fail to parse a consensus or
2754 a vote. Bugfix on 0.2.0.3-alpha.
2755 - Stop leaking v2_download_status_map on shutdown. Bugfix on
2757 - Stop leaking conn->nickname every time we make a connection to a
2758 Tor relay without knowing its expected identity digest (e.g. when
2759 using bridges). Bugfix on 0.2.0.3-alpha.
2761 - Minor bugfixes (portability):
2762 - Run correctly on platforms where rlim_t is larger than unsigned
2763 long, and/or where the real limit for number of open files is
2764 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
2765 particular, these may be needed for OS X 10.5.
2768 Changes in version 0.1.2.18 - 2007-10-28
2769 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
2770 hidden service introduction that were causing huge delays, and a big
2771 bug that was causing some servers to disappear from the network status
2772 lists for a few hours each day.
2774 o Major bugfixes (crashes):
2775 - If a connection is shut down abruptly because of something that
2776 happened inside connection_flushed_some(), do not call
2777 connection_finished_flushing(). Should fix bug 451:
2778 "connection_stop_writing: Assertion conn->write_event failed"
2779 Bugfix on 0.1.2.7-alpha.
2780 - Fix possible segfaults in functions called from
2781 rend_process_relay_cell().
2783 o Major bugfixes (hidden services):
2784 - Hidden services were choosing introduction points uniquely by
2785 hexdigest, but when constructing the hidden service descriptor
2786 they merely wrote the (potentially ambiguous) nickname.
2787 - Clients now use the v2 intro format for hidden service
2788 connections: they specify their chosen rendezvous point by identity
2789 digest rather than by (potentially ambiguous) nickname. These
2790 changes could speed up hidden service connections dramatically.
2792 o Major bugfixes (other):
2793 - Stop publishing a new server descriptor just because we get a
2794 HUP signal. This led (in a roundabout way) to some servers getting
2795 dropped from the networkstatus lists for a few hours each day.
2796 - When looking for a circuit to cannibalize, consider family as well
2797 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
2798 circuit cannibalization).
2799 - When a router wasn't listed in a new networkstatus, we were leaving
2800 the flags for that router alone -- meaning it remained Named,
2801 Running, etc -- even though absence from the networkstatus means
2802 that it shouldn't be considered to exist at all anymore. Now we
2803 clear all the flags for routers that fall out of the networkstatus
2804 consensus. Fixes bug 529.
2807 - Don't try to access (or alter) the state file when running
2808 --list-fingerprint or --verify-config or --hash-password. Resolves
2810 - When generating information telling us how to extend to a given
2811 router, do not try to include the nickname if it is
2812 absent. Resolves bug 467.
2813 - Fix a user-triggerable segfault in expand_filename(). (There isn't
2814 a way to trigger this remotely.)
2815 - When sending a status event to the controller telling it that an
2816 OR address is reachable, set the port correctly. (Previously we
2817 were reporting the dir port.)
2818 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
2819 command. Bugfix on 0.1.2.17.
2820 - When loading bandwidth history, do not believe any information in
2821 the future. Fixes bug 434.
2822 - When loading entry guard information, do not believe any information
2824 - When we have our clock set far in the future and generate an
2825 onion key, then re-set our clock to be correct, we should not stop
2826 the onion key from getting rotated.
2827 - On some platforms, accept() can return a broken address. Detect
2828 this more quietly, and deal accordingly. Fixes bug 483.
2829 - It's not actually an error to find a non-pending entry in the DNS
2830 cache when canceling a pending resolve. Don't log unless stuff
2831 is fishy. Resolves bug 463.
2832 - Don't reset trusted dir server list when we set a configuration
2833 option. Patch from Robert Hogan.
2834 - Don't try to create the datadir when running --verify-config or
2835 --hash-password. Resolves bug 540.
2838 Changes in version 0.2.0.9-alpha - 2007-10-24
2839 This ninth development snapshot switches clients to the new v3 directory
2840 system; allows servers to be listed in the network status even when they
2841 have the same nickname as a registered server; and fixes many other
2842 bugs including a big one that was causing some servers to disappear
2843 from the network status lists for a few hours each day.
2845 o Major features (directory system):
2846 - Clients now download v3 consensus networkstatus documents instead
2847 of v2 networkstatus documents. Clients and caches now base their
2848 opinions about routers on these consensus documents. Clients only
2849 download router descriptors listed in the consensus.
2850 - Authorities now list servers who have the same nickname as
2851 a different named server, but list them with a new flag,
2852 "Unnamed". Now we can list servers that happen to pick the same
2853 nickname as a server that registered two years ago and then
2854 disappeared. Partially implements proposal 122.
2855 - If the consensus lists a router as "Unnamed", the name is assigned
2856 to a different router: do not identify the router by that name.
2857 Partially implements proposal 122.
2858 - Authorities can now come to a consensus on which method to use to
2859 compute the consensus. This gives us forward compatibility.
2862 - Stop publishing a new server descriptor just because we HUP or
2863 when we find our DirPort to be reachable but won't actually publish
2864 it. New descriptors without any real changes are dropped by the
2865 authorities, and can screw up our "publish every 18 hours" schedule.
2867 - When a router wasn't listed in a new networkstatus, we were leaving
2868 the flags for that router alone -- meaning it remained Named,
2869 Running, etc -- even though absence from the networkstatus means
2870 that it shouldn't be considered to exist at all anymore. Now we
2871 clear all the flags for routers that fall out of the networkstatus
2872 consensus. Fixes bug 529; bugfix on 0.1.2.x.
2873 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
2874 extrainfo documents and then discard them immediately for not
2875 matching the latest router. Bugfix on 0.2.0.1-alpha.
2877 o Minor features (v3 directory protocol):
2878 - Allow tor-gencert to generate a new certificate without replacing
2880 - Allow certificates to include an address.
2881 - When we change our directory-cache settings, reschedule all voting
2882 and download operations.
2883 - Reattempt certificate downloads immediately on failure, as long as
2884 we haven't failed a threshold number of times yet.
2885 - Delay retrying consensus downloads while we're downloading
2886 certificates to verify the one we just got. Also, count getting a
2887 consensus that we already have (or one that isn't valid) as a failure,
2888 and count failing to get the certificates after 20 minutes as a
2890 - Build circuits and download descriptors even if our consensus is a
2891 little expired. (This feature will go away once authorities are
2894 o Minor features (router descriptor cache):
2895 - If we find a cached-routers file that's been sitting around for more
2896 than 28 days unmodified, then most likely it's a leftover from
2897 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
2899 - When we (as a cache) download a descriptor because it was listed
2900 in a consensus, remember when the consensus was supposed to expire,
2901 and don't expire the descriptor until then.
2903 o Minor features (performance):
2904 - Call routerlist_remove_old_routers() much less often. This should
2905 speed startup, especially on directory caches.
2906 - Don't try to launch new descriptor downloads quite so often when we
2907 already have enough directory information to build circuits.
2908 - Base64 decoding was actually showing up on our profile when parsing
2909 the initial descriptor file; switch to an in-process all-at-once
2910 implementation that's about 3.5x times faster than calling out to
2913 o Minor features (compilation):
2914 - Detect non-ASCII platforms (if any still exist) and refuse to
2915 build there: some of our code assumes that 'A' is 65 and so on.
2917 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
2918 - Make the "next period" votes into "current period" votes immediately
2919 after publishing the consensus; avoid a heisenbug that made them
2920 stick around indefinitely.
2921 - When we discard a vote as a duplicate, do not report this as
2923 - Treat missing v3 keys or certificates as an error when running as a
2924 v3 directory authority.
2925 - When we're configured to be a v3 authority, but we're only listed
2926 as a non-v3 authority in our DirServer line for ourself, correct
2928 - If an authority doesn't have a qualified hostname, just put
2929 its address in the vote. This fixes the problem where we referred to
2930 "moria on moria:9031."
2931 - Distinguish between detached signatures for the wrong period, and
2932 detached signatures for a divergent vote.
2933 - Fix a small memory leak when computing a consensus.
2934 - When there's no concensus, we were forming a vote every 30
2935 minutes, but writing the "valid-after" line in our vote based
2936 on our configured V3AuthVotingInterval: so unless the intervals
2937 matched up, we immediately rejected our own vote because it didn't
2938 start at the voting interval that caused us to construct a vote.
2940 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
2941 - Delete unverified-consensus when the real consensus is set.
2942 - Consider retrying a consensus networkstatus fetch immediately
2943 after one fails: don't wait 60 seconds to notice.
2944 - When fetching a consensus as a cache, wait until a newer consensus
2945 should exist before trying to replace the current one.
2946 - Use a more forgiving schedule for retrying failed consensus
2947 downloads than for other types.
2949 o Minor bugfixes (other directory issues):
2950 - Correct the implementation of "download votes by digest." Bugfix on
2952 - Authorities no longer send back "400 you're unreachable please fix
2953 it" errors to Tor servers that aren't online all the time. We're
2954 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
2956 o Minor bugfixes (controller):
2957 - Don't reset trusted dir server list when we set a configuration
2958 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
2959 - Respond to INT and TERM SIGNAL commands before we execute the
2960 signal, in case the signal shuts us down. We had a patch in
2961 0.1.2.1-alpha that tried to do this by queueing the response on
2962 the connection's buffer before shutting down, but that really
2963 isn't the same thing at all. Bug located by Matt Edman.
2965 o Minor bugfixes (misc):
2966 - Correctly check for bad options to the "PublishServerDescriptor"
2967 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
2968 - Stop leaking memory on failing case of base32_decode, and make
2969 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
2970 - Don't try to download extrainfo documents when we're trying to
2971 fetch enough directory info to build a circuit: having enough
2972 info should get priority. Bugfix on 0.2.0.x.
2973 - Don't complain that "your server has not managed to confirm that its
2974 ports are reachable" if we haven't been able to build any circuits
2975 yet. Bug found by spending four hours without a v3 consensus. Bugfix
2977 - Detect the reason for failing to mmap a descriptor file we just
2978 wrote, and give a more useful log message. Fixes bug 533. Bugfix
2981 o Code simplifications and refactoring:
2982 - Remove support for the old bw_accounting file: we've been storing
2983 bandwidth accounting information in the state file since
2984 0.1.2.5-alpha. This may result in bandwidth accounting errors
2985 if you try to upgrade from 0.1.1.x or earlier, or if you try to
2986 downgrade to 0.1.1.x or earlier.
2987 - New convenience code to locate a file within the DataDirectory.
2988 - Move non-authority functionality out of dirvote.c.
2989 - Refactor the arguments for router_pick_{directory_|trusteddir}server
2990 so that they all take the same named flags.
2993 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
2994 Unix users an easy way to script their Tor process (e.g. by
2995 adjusting bandwidth based on the time of the day).
2998 Changes in version 0.2.0.8-alpha - 2007-10-12
2999 This eighth development snapshot fixes a crash bug that's been bothering
3000 us since February 2007, lets bridge authorities store a list of bridge
3001 descriptors they've seen, gets v3 directory voting closer to working,
3002 starts caching v3 directory consensus documents on directory mirrors,
3003 and fixes a variety of smaller issues including some minor memory leaks.
3005 o Major features (router descriptor cache):
3006 - Store routers in a file called cached-descriptors instead of in
3007 cached-routers. Initialize cached-descriptors from cached-routers
3008 if the old format is around. The new format allows us to store
3009 annotations along with descriptors.
3010 - Use annotations to record the time we received each descriptor, its
3011 source, and its purpose.
3012 - Disable the SETROUTERPURPOSE controller command: it is now
3014 - Controllers should now specify cache=no or cache=yes when using
3015 the +POSTDESCRIPTOR command.
3016 - Bridge authorities now write bridge descriptors to disk, meaning
3017 we can export them to other programs and begin distributing them
3020 o Major features (directory authorities):
3021 - When a v3 authority is missing votes or signatures, it now tries
3023 - Directory authorities track weighted fractional uptime as well as
3024 weighted mean-time-between failures. WFU is suitable for deciding
3025 whether a node is "usually up", while MTBF is suitable for deciding
3026 whether a node is "likely to stay up." We need both, because
3027 "usually up" is a good requirement for guards, while "likely to
3028 stay up" is a good requirement for long-lived connections.
3030 o Major features (v3 directory system):
3031 - Caches now download v3 network status documents as needed,
3032 and download the descriptors listed in them.
3033 - All hosts now attempt to download and keep fresh v3 authority
3034 certificates, and re-attempt after failures.
3035 - More internal-consistency checks for vote parsing.
3037 o Major bugfixes (crashes):
3038 - If a connection is shut down abruptly because of something that
3039 happened inside connection_flushed_some(), do not call
3040 connection_finished_flushing(). Should fix bug 451. Bugfix on
3043 o Major bugfixes (performance):
3044 - Fix really bad O(n^2) performance when parsing a long list of
3045 routers: Instead of searching the entire list for an "extra-info "
3046 string which usually wasn't there, once for every routerinfo
3047 we read, just scan lines forward until we find one we like.
3049 - When we add data to a write buffer in response to the data on that
3050 write buffer getting low because of a flush, do not consider the
3051 newly added data as a candidate for immediate flushing, but rather
3052 make it wait until the next round of writing. Otherwise, we flush
3053 and refill recursively, and a single greedy TLS connection can
3054 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
3056 o Minor features (v3 authority system):
3057 - Add more ways for tools to download the votes that lead to the
3059 - Send a 503 when low on bandwidth and a vote, consensus, or
3060 certificate is requested.
3061 - If-modified-since is now implemented properly for all kinds of
3062 certificate requests.
3064 o Minor bugfixes (network statuses):
3065 - Tweak the implementation of proposal 109 slightly: allow at most
3066 two Tor servers on the same IP address, except if it's the location
3067 of a directory authority, in which case allow five. Bugfix on
3070 o Minor bugfixes (controller):
3071 - When sending a status event to the controller telling it that an
3072 OR address is reachable, set the port correctly. (Previously we
3073 were reporting the dir port.) Bugfix on 0.1.2.x.
3075 o Minor bugfixes (v3 directory system):
3076 - Fix logic to look up a cert by its signing key digest. Bugfix on
3078 - Only change the reply to a vote to "OK" if it's not already
3079 set. This gets rid of annoying "400 OK" log messages, which may
3080 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
3081 - When we get a valid consensus, recompute the voting schedule.
3082 - Base the valid-after time of a vote on the consensus voting
3083 schedule, not on our preferred schedule.
3084 - Make the return values and messages from signature uploads and
3085 downloads more sensible.
3086 - Fix a memory leak when serving votes and consensus documents, and
3087 another when serving certificates.
3089 o Minor bugfixes (performance):
3090 - Use a slightly simpler string hashing algorithm (copying Python's
3091 instead of Java's) and optimize our digest hashing algorithm to take
3092 advantage of 64-bit platforms and to remove some possibly-costly
3094 - Fix a minor memory leak whenever we parse guards from our state
3095 file. Bugfix on 0.2.0.7-alpha.
3096 - Fix a minor memory leak whenever we write out a file. Bugfix on
3098 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
3099 command. Bugfix on 0.2.0.5-alpha.
3101 o Minor bugfixes (portability):
3102 - On some platforms, accept() can return a broken address. Detect
3103 this more quietly, and deal accordingly. Fixes bug 483.
3104 - Stop calling tor_strlower() on uninitialized memory in some cases.
3105 Bugfix in 0.2.0.7-alpha.
3107 o Minor bugfixes (usability):
3108 - Treat some 403 responses from directory servers as INFO rather than
3109 WARN-severity events.
3110 - It's not actually an error to find a non-pending entry in the DNS
3111 cache when canceling a pending resolve. Don't log unless stuff is
3112 fishy. Resolves bug 463.
3114 o Minor bugfixes (anonymity):
3115 - Never report that we've used more bandwidth than we're willing to
3116 relay: it leaks how much non-relay traffic we're using. Resolves
3118 - When looking for a circuit to cannibalize, consider family as well
3119 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
3120 circuit cannibalization).
3122 o Code simplifications and refactoring:
3123 - Make a bunch of functions static. Remove some dead code.
3124 - Pull out about a third of the really big routerlist.c; put it in a
3125 new module, networkstatus.c.
3126 - Merge the extra fields in local_routerstatus_t back into
3127 routerstatus_t: we used to need one routerstatus_t for each
3128 authority's opinion, plus a local_routerstatus_t for the locally
3129 computed consensus opinion. To save space, we put the locally
3130 modified fields into local_routerstatus_t, and only the common
3131 stuff into routerstatus_t. But once v3 directories are in use,
3132 clients and caches will no longer need to hold authority opinions;
3133 thus, the rationale for keeping the types separate is now gone.
3134 - Make the code used to reschedule and reattempt downloads more
3136 - Turn all 'Are we a directory server/mirror?' logic into a call to
3138 - Remove the code to generate the oldest (v1) directory format.
3139 The code has been disabled since 0.2.0.5-alpha.
3142 Changes in version 0.2.0.7-alpha - 2007-09-21
3143 This seventh development snapshot makes bridges work again, makes bridge
3144 authorities work for the first time, fixes two huge performance flaws
3145 in hidden services, and fixes a variety of minor issues.
3147 o New directory authorities:
3148 - Set up moria1 and tor26 as the first v3 directory authorities. See
3149 doc/spec/dir-spec.txt for details on the new directory design.
3151 o Major bugfixes (crashes):
3152 - Fix possible segfaults in functions called from
3153 rend_process_relay_cell(). Bugfix on 0.1.2.x.
3155 o Major bugfixes (bridges):
3156 - Fix a bug that made servers send a "404 Not found" in response to
3157 attempts to fetch their server descriptor. This caused Tor servers
3158 to take many minutes to establish reachability for their DirPort,
3159 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
3160 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
3161 users configure that and specify a bridge with an identity
3162 fingerprint, now they will lookup the bridge descriptor at the
3163 default bridge authority via a one-hop tunnel, but once circuits
3164 are established they will switch to a three-hop tunnel for later
3165 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
3167 o Major bugfixes (hidden services):
3168 - Hidden services were choosing introduction points uniquely by
3169 hexdigest, but when constructing the hidden service descriptor
3170 they merely wrote the (potentially ambiguous) nickname.
3171 - Clients now use the v2 intro format for hidden service
3172 connections: they specify their chosen rendezvous point by identity
3173 digest rather than by (potentially ambiguous) nickname. Both
3174 are bugfixes on 0.1.2.x, and they could speed up hidden service
3175 connections dramatically. Thanks to Karsten Loesing.
3177 o Minor features (security):
3178 - As a client, do not believe any server that tells us that an
3179 address maps to an internal address space.
3180 - Make it possible to enable HashedControlPassword and
3181 CookieAuthentication at the same time.
3183 o Minor features (guard nodes):
3184 - Tag every guard node in our state file with the version that
3185 we believe added it, or with our own version if we add it. This way,
3186 if a user temporarily runs an old version of Tor and then switches
3187 back to a new one, she doesn't automatically lose her guards.
3189 o Minor features (speed):
3190 - When implementing AES counter mode, update only the portions of the
3191 counter buffer that need to change, and don't keep separate
3192 network-order and host-order counters when they are the same (i.e.,
3193 on big-endian hosts.)
3195 o Minor features (controller):
3196 - Accept LF instead of CRLF on controller, since some software has a
3197 hard time generating real Internet newlines.
3198 - Add GETINFO values for the server status events
3199 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
3203 - Routers no longer include bandwidth-history lines in their
3204 descriptors; this information is already available in extra-info
3205 documents, and including it in router descriptors took up 60%
3206 (!) of compressed router descriptor downloads. Completes
3207 implementation of proposal 104.
3208 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
3209 and TorControl.py, as they use the old v0 controller protocol,
3210 and are obsoleted by TorFlow anyway.
3211 - Drop support for v1 rendezvous descriptors, since we never used
3212 them anyway, and the code has probably rotted by now. Based on
3213 patch from Karsten Loesing.
3214 - On OSX, stop warning the user that kqueue support in libevent is
3215 "experimental", since it seems to have worked fine for ages.
3218 - When generating information telling us how to extend to a given
3219 router, do not try to include the nickname if it is absent. Fixes
3220 bug 467. Bugfix on 0.2.0.3-alpha.
3221 - Fix a user-triggerable (but not remotely-triggerable) segfault
3222 in expand_filename(). Bugfix on 0.1.2.x.
3223 - Fix a memory leak when freeing incomplete requests from DNSPort.
3224 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
3225 - Don't try to access (or alter) the state file when running
3226 --list-fingerprint or --verify-config or --hash-password. (Resolves
3227 bug 499.) Bugfix on 0.1.2.x.
3228 - Servers used to decline to publish their DirPort if their
3229 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
3230 were below a threshold. Now they only look at BandwidthRate and
3231 RelayBandwidthRate. Bugfix on 0.1.2.x.
3232 - Remove an optimization in the AES counter-mode code that assumed
3233 that the counter never exceeded 2^68. When the counter can be set
3234 arbitrarily as an IV (as it is by Karsten's new hidden services
3235 code), this assumption no longer holds. Bugfix on 0.1.2.x.
3236 - Resume listing "AUTHORITY" flag for authorities in network status.
3237 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
3239 o Code simplifications and refactoring:
3240 - Revamp file-writing logic so we don't need to have the entire
3241 contents of a file in memory at once before we write to disk. Tor,
3243 - Turn "descriptor store" into a full-fledged type.
3244 - Move all NT services code into a separate source file.
3245 - Unify all code that computes medians, percentile elements, etc.
3246 - Get rid of a needless malloc when parsing address policies.
3249 Changes in version 0.1.2.17 - 2007-08-30
3250 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
3251 X bundles. Vidalia 0.0.14 makes authentication required for the
3252 ControlPort in the default configuration, which addresses important
3253 security risks. Everybody who uses Vidalia (or another controller)
3256 In addition, this Tor update fixes major load balancing problems with
3257 path selection, which should speed things up a lot once many people
3260 o Major bugfixes (security):
3261 - We removed support for the old (v0) control protocol. It has been
3262 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
3263 become more of a headache than it's worth.
3265 o Major bugfixes (load balancing):
3266 - When choosing nodes for non-guard positions, weight guards
3267 proportionally less, since they already have enough load. Patch
3269 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
3270 will allow fast Tor servers to get more attention.
3271 - When we're upgrading from an old Tor version, forget our current
3272 guards and pick new ones according to the new weightings. These
3273 three load balancing patches could raise effective network capacity
3274 by a factor of four. Thanks to Mike Perry for measurements.
3276 o Major bugfixes (stream expiration):
3277 - Expire not-yet-successful application streams in all cases if
3278 they've been around longer than SocksTimeout. Right now there are
3279 some cases where the stream will live forever, demanding a new
3280 circuit every 15 seconds. Fixes bug 454; reported by lodger.
3282 o Minor features (controller):
3283 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
3284 is valid before any authentication has been received. It tells
3285 a controller what kind of authentication is expected, and what
3286 protocol is spoken. Implements proposal 119.
3288 o Minor bugfixes (performance):
3289 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
3290 greatly speeding up loading cached-routers from disk on startup.
3291 - Disable sentinel-based debugging for buffer code: we squashed all
3292 the bugs that this was supposed to detect a long time ago, and now
3293 its only effect is to change our buffer sizes from nice powers of
3294 two (which platform mallocs tend to like) to values slightly over
3295 powers of two (which make some platform mallocs sad).
3297 o Minor bugfixes (misc):
3298 - If exit bandwidth ever exceeds one third of total bandwidth, then
3299 use the correct formula to weight exit nodes when choosing paths.
3300 Based on patch from Mike Perry.
3301 - Choose perfectly fairly among routers when choosing by bandwidth and
3302 weighting by fraction of bandwidth provided by exits. Previously, we
3303 would choose with only approximate fairness, and correct ourselves
3304 if we ran off the end of the list.
3305 - If we require CookieAuthentication but we fail to write the
3306 cookie file, we would warn but not exit, and end up in a state
3307 where no controller could authenticate. Now we exit.
3308 - If we require CookieAuthentication, stop generating a new cookie
3309 every time we change any piece of our config.
3310 - Refuse to start with certain directory authority keys, and
3311 encourage people using them to stop.
3312 - Terminate multi-line control events properly. Original patch
3314 - Fix a minor memory leak when we fail to find enough suitable
3315 servers to choose a circuit.
3316 - Stop leaking part of the descriptor when we run into a particularly
3317 unparseable piece of it.
3320 Changes in version 0.2.0.6-alpha - 2007-08-26
3321 This sixth development snapshot features a new Vidalia version in the
3322 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
3323 the ControlPort in the default configuration, which addresses important
3326 In addition, this snapshot fixes major load balancing problems
3327 with path selection, which should speed things up a lot once many
3328 people have upgraded. The directory authorities also use a new
3329 mean-time-between-failure approach to tracking which servers are stable,
3330 rather than just looking at the most recent uptime.
3332 o New directory authorities:
3333 - Set up Tonga as the default bridge directory authority.
3336 - Directory authorities now track servers by weighted
3337 mean-times-between-failures. When we have 4 or more days of data,
3338 use measured MTBF rather than declared uptime to decide whether
3339 to call a router Stable. Implements proposal 108.
3341 o Major bugfixes (load balancing):
3342 - When choosing nodes for non-guard positions, weight guards
3343 proportionally less, since they already have enough load. Patch
3345 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
3346 will allow fast Tor servers to get more attention.
3347 - When we're upgrading from an old Tor version, forget our current
3348 guards and pick new ones according to the new weightings. These
3349 three load balancing patches could raise effective network capacity
3350 by a factor of four. Thanks to Mike Perry for measurements.
3352 o Major bugfixes (descriptor parsing):
3353 - Handle unexpected whitespace better in malformed descriptors. Bug
3354 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
3357 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
3358 GETINFO for Torstat to use until it can switch to using extrainfos.
3359 - Optionally (if built with -DEXPORTMALLINFO) export the output
3360 of mallinfo via http, as tor/mallinfo.txt. Only accessible
3364 - Do not intermix bridge routers with controller-added
3365 routers. (Bugfix on 0.2.0.x)
3366 - Do not fail with an assert when accept() returns an unexpected
3367 address family. Addresses but does not wholly fix bug 483. (Bugfix
3369 - Let directory authorities startup even when they can't generate
3370 a descriptor immediately, e.g. because they don't know their
3372 - Stop putting the authentication cookie in a file called "0"
3373 in your working directory if you don't specify anything for the
3374 new CookieAuthFile option. Reported by Matt Edman.
3375 - Make it possible to read the PROTOCOLINFO response in a way that
3376 conforms to our control-spec. Reported by Matt Edman.
3377 - Fix a minor memory leak when we fail to find enough suitable
3378 servers to choose a circuit. Bugfix on 0.1.2.x.
3379 - Stop leaking part of the descriptor when we run into a particularly
3380 unparseable piece of it. Bugfix on 0.1.2.x.
3381 - Unmap the extrainfo cache file on exit.
3384 Changes in version 0.2.0.5-alpha - 2007-08-19
3385 This fifth development snapshot fixes compilation on Windows again;
3386 fixes an obnoxious client-side bug that slowed things down and put
3387 extra load on the network; gets us closer to using the v3 directory
3388 voting scheme; makes it easier for Tor controllers to use cookie-based
3389 authentication; and fixes a variety of other bugs.
3392 - Version 1 directories are no longer generated in full. Instead,
3393 authorities generate and serve "stub" v1 directories that list
3394 no servers. This will stop Tor versions 0.1.0.x and earlier from
3395 working, but (for security reasons) nobody should be running those
3398 o Major bugfixes (compilation, 0.2.0.x):
3399 - Try to fix Win32 compilation again: improve checking for IPv6 types.
3400 - Try to fix MSVC compilation: build correctly on platforms that do
3401 not define s6_addr16 or s6_addr32.
3402 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
3405 o Major bugfixes (stream expiration):
3406 - Expire not-yet-successful application streams in all cases if
3407 they've been around longer than SocksTimeout. Right now there are
3408 some cases where the stream will live forever, demanding a new
3409 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
3412 o Minor features (directory servers):
3413 - When somebody requests a list of statuses or servers, and we have
3414 none of those, return a 404 rather than an empty 200.
3416 o Minor features (directory voting):
3417 - Store v3 consensus status consensuses on disk, and reload them
3420 o Minor features (security):
3421 - Warn about unsafe ControlPort configurations.
3422 - Refuse to start with certain directory authority keys, and
3423 encourage people using them to stop.
3425 o Minor features (controller):
3426 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
3427 is valid before any authentication has been received. It tells
3428 a controller what kind of authentication is expected, and what
3429 protocol is spoken. Implements proposal 119.
3430 - New config option CookieAuthFile to choose a new location for the
3431 cookie authentication file, and config option
3432 CookieAuthFileGroupReadable to make it group-readable.
3434 o Minor features (unit testing):
3435 - Add command-line arguments to unit-test executable so that we can
3436 invoke any chosen test from the command line rather than having
3437 to run the whole test suite at once; and so that we can turn on
3438 logging for the unit tests.
3440 o Minor bugfixes (on 0.1.2.x):
3441 - If we require CookieAuthentication but we fail to write the
3442 cookie file, we would warn but not exit, and end up in a state
3443 where no controller could authenticate. Now we exit.
3444 - If we require CookieAuthentication, stop generating a new cookie
3445 every time we change any piece of our config.
3446 - When loading bandwidth history, do not believe any information in
3447 the future. Fixes bug 434.
3448 - When loading entry guard information, do not believe any information
3450 - When we have our clock set far in the future and generate an
3451 onion key, then re-set our clock to be correct, we should not stop
3452 the onion key from getting rotated.
3453 - Clean up torrc sample config file.
3454 - Do not automatically run configure from autogen.sh. This
3455 non-standard behavior tended to annoy people who have built other
3458 o Minor bugfixes (on 0.2.0.x):
3459 - Fix a bug with AutomapHostsOnResolve that would always cause
3460 the second request to fail. Bug reported by Kate. Bugfix on
3462 - Fix a bug in ADDRMAP controller replies that would sometimes
3463 try to print a NULL. Patch from tup.
3464 - Read v3 directory authority keys from the right location.
3465 - Numerous bugfixes to directory voting code.
3468 Changes in version 0.1.2.16 - 2007-08-01
3469 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
3470 remote attacker in certain situations to rewrite the user's torrc
3471 configuration file. This can completely compromise anonymity of users
3472 in most configurations, including those running the Vidalia bundles,
3473 TorK, etc. Or worse.
3475 o Major security fixes:
3476 - Close immediately after missing authentication on control port;
3477 do not allow multiple authentication attempts.
3480 Changes in version 0.2.0.4-alpha - 2007-08-01
3481 This fourth development snapshot fixes a critical security vulnerability
3482 for most users, specifically those running Vidalia, TorK, etc. Everybody
3483 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
3485 o Major security fixes:
3486 - Close immediately after missing authentication on control port;
3487 do not allow multiple authentication attempts.
3489 o Major bugfixes (compilation):
3490 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
3493 o Minor features (performance):
3494 - Be even more aggressive about releasing RAM from small
3495 empty buffers. Thanks to our free-list code, this shouldn't be too
3496 performance-intensive.
3497 - Disable sentinel-based debugging for buffer code: we squashed all
3498 the bugs that this was supposed to detect a long time ago, and
3499 now its only effect is to change our buffer sizes from nice
3500 powers of two (which platform mallocs tend to like) to values
3501 slightly over powers of two (which make some platform mallocs sad).
3502 - Log malloc statistics from mallinfo() on platforms where it
3506 Changes in version 0.2.0.3-alpha - 2007-07-29
3507 This third development snapshot introduces new experimental
3508 blocking-resistance features and a preliminary version of the v3
3509 directory voting design, and includes many other smaller features
3513 - The first pieces of our "bridge" design for blocking-resistance
3514 are implemented. People can run bridge directory authorities;
3515 people can run bridges; and people can configure their Tor clients
3516 with a set of bridges to use as the first hop into the Tor network.
3517 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
3519 - Create listener connections before we setuid to the configured
3520 User and Group. Now non-Windows users can choose port values
3521 under 1024, start Tor as root, and have Tor bind those ports
3522 before it changes to another UID. (Windows users could already
3524 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
3525 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
3526 on "vserver" accounts. (Patch from coderman.)
3527 - Be even more aggressive about separating local traffic from relayed
3528 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
3530 o Major features (experimental):
3531 - First cut of code for "v3 dir voting": directory authorities will
3532 vote on a common network status document rather than each publishing
3533 their own opinion. This code needs more testing and more corner-case
3534 handling before it's ready for use.
3537 - Directory authorities now call routers Fast if their bandwidth is
3538 at least 100KB/s, and consider their bandwidth adequate to be a
3539 Guard if it is at least 250KB/s, no matter the medians. This fix
3540 complements proposal 107. [Bugfix on 0.1.2.x]
3541 - Directory authorities now never mark more than 3 servers per IP as
3542 Valid and Running. (Implements proposal 109, by Kevin Bauer and
3544 - Minor change to organizationName and commonName generation
3545 procedures in TLS certificates during Tor handshakes, to invalidate
3546 some earlier censorware approaches. This is not a long-term
3547 solution, but applying it will give us a bit of time to look into
3548 the epidemiology of countermeasures as they spread.
3550 o Major bugfixes (directory):
3551 - Rewrite directory tokenization code to never run off the end of
3552 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
3554 o Minor features (controller):
3555 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
3556 match requests to applications. (Patch from Robert Hogan.)
3557 - Report address and port correctly on connections to DNSPort. (Patch
3559 - Add a RESOLVE command to launch hostname lookups. (Original patch
3561 - Add GETINFO status/enough-dir-info to let controllers tell whether
3562 Tor has downloaded sufficient directory information. (Patch
3564 - You can now use the ControlSocket option to tell Tor to listen for
3565 controller connections on Unix domain sockets on systems that
3566 support them. (Patch from Peter Palfrader.)
3567 - STREAM NEW events are generated for DNSPort requests and for
3568 tunneled directory connections. (Patch from Robert Hogan.)
3569 - New "GETINFO address-mappings/*" command to get address mappings
3570 with expiry information. "addr-mappings/*" is now deprecated.
3573 o Minor features (misc):
3574 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
3576 - The tor-gencert tool for v3 directory authorities now creates all
3577 files as readable to the file creator only, and write-protects
3578 the authority identity key.
3579 - When dumping memory usage, list bytes used in buffer memory
3581 - When running with dmalloc, dump more stats on hup and on exit.
3582 - Directory authorities now fail quickly and (relatively) harmlessly
3583 if they generate a network status document that is somehow
3586 o Traffic load balancing improvements:
3587 - If exit bandwidth ever exceeds one third of total bandwidth, then
3588 use the correct formula to weight exit nodes when choosing paths.
3589 (Based on patch from Mike Perry.)
3590 - Choose perfectly fairly among routers when choosing by bandwidth and
3591 weighting by fraction of bandwidth provided by exits. Previously, we
3592 would choose with only approximate fairness, and correct ourselves
3593 if we ran off the end of the list. [Bugfix on 0.1.2.x]
3595 o Performance improvements:
3596 - Be more aggressive with freeing buffer RAM or putting it on the
3598 - Use Critical Sections rather than Mutexes for synchronizing threads
3599 on win32; Mutexes are heavier-weight, and designed for synchronizing
3602 o Deprecated and removed features:
3603 - RedirectExits is now deprecated.
3604 - Stop allowing address masks that do not correspond to bit prefixes.
3605 We have warned about these for a really long time; now it's time
3606 to reject them. (Patch from croup.)
3608 o Minor bugfixes (directory):
3609 - Fix another crash bug related to extra-info caching. (Bug found by
3610 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
3611 - Directories no longer return a "304 not modified" when they don't
3612 have the networkstatus the client asked for. Also fix a memory
3613 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
3614 - We had accidentally labelled 0.1.2.x directory servers as not
3615 suitable for begin_dir requests, and had labelled no directory
3616 servers as suitable for uploading extra-info documents. [Bugfix
3619 o Minor bugfixes (dns):
3620 - Fix a crash when DNSPort is set more than once. (Patch from Robert
3621 Hogan.) [Bugfix on 0.2.0.2-alpha]
3622 - Add DNSPort connections to the global connection list, so that we
3623 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
3625 - Fix a dangling reference that could lead to a crash when DNSPort is
3626 changed or closed (Patch from Robert Hogan.) [Bugfix on
3629 o Minor bugfixes (controller):
3630 - Provide DNS expiry times in GMT, not in local time. For backward
3631 compatibility, ADDRMAP events only provide GMT expiry in an extended
3632 field. "GETINFO address-mappings" always does the right thing.
3633 - Use CRLF line endings properly in NS events.
3634 - Terminate multi-line control events properly. (Original patch
3635 from tup.) [Bugfix on 0.1.2.x-alpha]
3636 - Do not include spaces in SOURCE_ADDR fields in STREAM
3637 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
3640 Changes in version 0.1.2.15 - 2007-07-17
3641 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
3642 problems, fixes compilation on BSD, and fixes a variety of other
3643 bugs. Everybody should upgrade.
3645 o Major bugfixes (compilation):
3646 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
3648 o Major bugfixes (crashes):
3649 - Try even harder not to dereference the first character after
3650 an mmap(). Reported by lodger.
3651 - Fix a crash bug in directory authorities when we re-number the
3652 routerlist while inserting a new router.
3653 - When the cached-routers file is an even multiple of the page size,
3654 don't run off the end and crash. (Fixes bug 455; based on idea
3656 - Fix eventdns.c behavior on Solaris: It is critical to include
3657 orconfig.h _before_ sys/types.h, so that we can get the expected
3658 definition of _FILE_OFFSET_BITS.
3660 o Major bugfixes (security):
3661 - Fix a possible buffer overrun when using BSD natd support. Bug
3663 - When sending destroy cells from a circuit's origin, don't include
3664 the reason for tearing down the circuit. The spec says we didn't,
3665 and now we actually don't. Reported by lodger.
3666 - Keep streamids from different exits on a circuit separate. This
3667 bug may have allowed other routers on a given circuit to inject
3668 cells into streams. Reported by lodger; fixes bug 446.
3669 - If there's a never-before-connected-to guard node in our list,
3670 never choose any guards past it. This way we don't expand our
3671 guard list unless we need to.
3673 o Minor bugfixes (guard nodes):
3674 - Weight guard selection by bandwidth, so that low-bandwidth nodes
3675 don't get overused as guards.
3677 o Minor bugfixes (directory):
3678 - Correctly count the number of authorities that recommend each
3679 version. Previously, we were under-counting by 1.
3680 - Fix a potential crash bug when we load many server descriptors at
3681 once and some of them make others of them obsolete. Fixes bug 458.
3683 o Minor bugfixes (hidden services):
3684 - Stop tearing down the whole circuit when the user asks for a
3685 connection to a port that the hidden service didn't configure.
3688 o Minor bugfixes (misc):
3689 - On Windows, we were preventing other processes from reading
3690 cached-routers while Tor was running. Reported by janbar.
3691 - Fix a possible (but very unlikely) bug in picking routers by
3692 bandwidth. Add a log message to confirm that it is in fact
3693 unlikely. Patch from lodger.
3694 - Backport a couple of memory leak fixes.
3695 - Backport miscellaneous cosmetic bugfixes.
3698 Changes in version 0.2.0.2-alpha - 2007-06-02
3699 o Major bugfixes on 0.2.0.1-alpha:
3700 - Fix an assertion failure related to servers without extra-info digests.
3701 Resolves bugs 441 and 442.
3703 o Minor features (directory):
3704 - Support "If-Modified-Since" when answering HTTP requests for
3705 directories, running-routers documents, and network-status documents.
3706 (There's no need to support it for router descriptors, since those
3707 are downloaded by descriptor digest.)
3709 o Minor build issues:
3710 - Clear up some MIPSPro compiler warnings.
3711 - When building from a tarball on a machine that happens to have SVK
3712 installed, report the micro-revision as whatever version existed
3713 in the tarball, not as "x".
3716 Changes in version 0.2.0.1-alpha - 2007-06-01
3717 This early development snapshot provides new features for people running
3718 Tor as both a client and a server (check out the new RelayBandwidth
3719 config options); lets Tor run as a DNS proxy; and generally moves us
3720 forward on a lot of fronts.
3722 o Major features, server usability:
3723 - New config options RelayBandwidthRate and RelayBandwidthBurst:
3724 a separate set of token buckets for relayed traffic. Right now
3725 relayed traffic is defined as answers to directory requests, and
3726 OR connections that don't have any local circuits on them.
3728 o Major features, client usability:
3729 - A client-side DNS proxy feature to replace the need for
3730 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
3731 for DNS requests on port 9999, use the Tor network to resolve them
3732 anonymously, and send the reply back like a regular DNS server.
3733 The code still only implements a subset of DNS.
3734 - Make PreferTunneledDirConns and TunnelDirConns work even when
3735 we have no cached directory info. This means Tor clients can now
3736 do all of their connections protected by TLS.
3738 o Major features, performance and efficiency:
3739 - Directory authorities accept and serve "extra info" documents for
3740 routers. These documents contain fields from router descriptors
3741 that aren't usually needed, and that use a lot of excess
3742 bandwidth. Once these fields are removed from router descriptors,
3743 the bandwidth savings should be about 60%. [Partially implements
3745 - Servers upload extra-info documents to any authority that accepts
3746 them. Authorities (and caches that have been configured to download
3747 extra-info documents) download them as needed. [Partially implements
3749 - Change the way that Tor buffers data that it is waiting to write.
3750 Instead of queueing data cells in an enormous ring buffer for each
3751 client->OR or OR->OR connection, we now queue cells on a separate
3752 queue for each circuit. This lets us use less slack memory, and
3753 will eventually let us be smarter about prioritizing different kinds
3755 - Use memory pools to allocate cells with better speed and memory
3756 efficiency, especially on platforms where malloc() is inefficient.
3757 - Stop reading on edge connections when their corresponding circuit
3758 buffers are full; start again as the circuits empty out.
3760 o Major features, other:
3761 - Add an HSAuthorityRecordStats option that hidden service authorities
3762 can use to track statistics of overall hidden service usage without
3763 logging information that would be very useful to an attacker.
3764 - Start work implementing multi-level keys for directory authorities:
3765 Add a standalone tool to generate key certificates. (Proposal 103.)
3768 - Directory authorities now call routers Stable if they have an
3769 uptime of at least 30 days, even if that's not the median uptime
3770 in the network. Implements proposal 107, suggested by Kevin Bauer
3773 o Minor fixes (resource management):
3774 - Count the number of open sockets separately from the number
3775 of active connection_t objects. This will let us avoid underusing
3776 our allocated connection limit.
3777 - We no longer use socket pairs to link an edge connection to an
3778 anonymous directory connection or a DirPort test connection.
3779 Instead, we track the link internally and transfer the data
3780 in-process. This saves two sockets per "linked" connection (at the
3781 client and at the server), and avoids the nasty Windows socketpair()
3783 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
3784 for every single inactive connection_t. Free items from the
3785 4k/16k-buffer free lists when they haven't been used for a while.
3787 o Minor features (build):
3788 - Make autoconf search for libevent, openssl, and zlib consistently.
3789 - Update deprecated macros in configure.in.
3790 - When warning about missing headers, tell the user to let us
3791 know if the compile succeeds anyway, so we can downgrade the
3793 - Include the current subversion revision as part of the version
3794 string: either fetch it directly if we're in an SVN checkout, do
3795 some magic to guess it if we're in an SVK checkout, or use
3796 the last-detected version if we're building from a .tar.gz.
3797 Use this version consistently in log messages.
3799 o Minor features (logging):
3800 - Always prepend "Bug: " to any log message about a bug.
3801 - Put a platform string (e.g. "Linux i686") in the startup log
3802 message, so when people paste just their logs, we know if it's
3803 OpenBSD or Windows or what.
3804 - When logging memory usage, break down memory used in buffers by
3807 o Minor features (directory system):
3808 - New config option V2AuthoritativeDirectory that all directory
3809 authorities should set. This will let future authorities choose
3810 not to serve V2 directory information.
3811 - Directory authorities allow multiple router descriptors and/or extra
3812 info documents to be uploaded in a single go. This will make
3813 implementing proposal 104 simpler.
3815 o Minor features (controller):
3816 - Add a new config option __DisablePredictedCircuits designed for
3817 use by the controller, when we don't want Tor to build any circuits
3819 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
3820 so we can exit from the middle of the circuit.
3821 - Implement "getinfo status/circuit-established".
3822 - Implement "getinfo status/version/..." so a controller can tell
3823 whether the current version is recommended, and whether any versions
3824 are good, and how many authorities agree. (Patch from shibz.)
3826 o Minor features (hidden services):
3827 - Allow multiple HiddenServicePort directives with the same virtual
3828 port; when they occur, the user is sent round-robin to one
3829 of the target ports chosen at random. Partially fixes bug 393 by
3830 adding limited ad-hoc round-robining.
3832 o Minor features (other):
3834 - Add a new AutomapHostsOnResolve option: when it is enabled, any
3835 resolve request for hosts matching a given pattern causes Tor to
3836 generate an internal virtual address mapping for that host. This
3837 allows DNSPort to work sensibly with hidden service users. By
3838 default, .exit and .onion addresses are remapped; the list of
3839 patterns can be reconfigured with AutomapHostsSuffixes.
3840 - Add an "-F" option to tor-resolve to force a resolve for a .onion
3841 address. Thanks to the AutomapHostsOnResolve option, this is no
3842 longer a completely silly thing to do.
3843 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
3844 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
3845 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
3846 minus 1 byte: the actual maximum declared bandwidth.
3849 - Removed support for the old binary "version 0" controller protocol.
3850 This has been deprecated since 0.1.1, and warnings have been issued
3851 since 0.1.2. When we encounter a v0 control message, we now send
3852 back an error and close the connection.
3853 - Remove the old "dns worker" server DNS code: it hasn't been default
3854 since 0.1.2.2-alpha, and all the servers seem to be using the new
3857 o Minor bugfixes (portability):
3858 - Even though Windows is equally happy with / and \ as path separators,
3859 try to use \ consistently on Windows and / consistently on Unix: it
3860 makes the log messages nicer.
3861 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
3862 - Read resolv.conf files correctly on platforms where read() returns
3863 partial results on small file reads.
3865 o Minor bugfixes (directory):
3866 - Correctly enforce that elements of directory objects do not appear
3867 more often than they are allowed to appear.
3868 - When we are reporting the DirServer line we just parsed, we were
3869 logging the second stanza of the key fingerprint, not the first.
3871 o Minor bugfixes (logging):
3872 - When we hit an EOF on a log (probably because we're shutting down),
3873 don't try to remove the log from the list: just mark it as
3874 unusable. (Bulletproofs against bug 222.)
3876 o Minor bugfixes (other):
3877 - In the exitlist script, only consider the most recently published
3878 server descriptor for each server. Also, when the user requests
3879 a list of servers that _reject_ connections to a given address,
3880 explicitly exclude the IPs that also have servers that accept
3881 connections to that address. (Resolves bug 405.)
3882 - Stop allowing hibernating servers to be "stable" or "fast".
3883 - On Windows, we were preventing other processes from reading
3884 cached-routers while Tor was running. (Reported by janbar)
3885 - Make the NodeFamilies config option work. (Reported by
3886 lodger -- it has never actually worked, even though we added it
3888 - Check return values from pthread_mutex functions.
3889 - Don't save non-general-purpose router descriptors to the disk cache,
3890 because we have no way of remembering what their purpose was when
3892 - Add even more asserts to hunt down bug 417.
3893 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
3894 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
3895 Add a log message to confirm that it is in fact unlikely.
3897 o Minor bugfixes (controller):
3898 - Make 'getinfo fingerprint' return a 551 error if we're not a
3899 server, so we match what the control spec claims we do. Reported
3901 - Fix a typo in an error message when extendcircuit fails that
3902 caused us to not follow the \r\n-based delimiter protocol. Reported
3905 o Code simplifications and refactoring:
3906 - Stop passing around circuit_t and crypt_path_t pointers that are
3907 implicit in other procedure arguments.
3908 - Drop the old code to choke directory connections when the
3909 corresponding OR connections got full: thanks to the cell queue
3910 feature, OR conns don't get full any more.
3911 - Make dns_resolve() handle attaching connections to circuits
3912 properly, so the caller doesn't have to.
3913 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
3914 - Keep the connection array as a dynamic smartlist_t, rather than as
3915 a fixed-sized array. This is important, as the number of connections
3916 is becoming increasingly decoupled from the number of sockets.
3919 Changes in version 0.1.2.14 - 2007-05-25
3920 Tor 0.1.2.14 changes the addresses of two directory authorities (this
3921 change especially affects those who serve or use hidden services),
3922 and fixes several other crash- and security-related bugs.
3924 o Directory authority changes:
3925 - Two directory authorities (moria1 and moria2) just moved to new
3926 IP addresses. This change will particularly affect those who serve
3927 or use hidden services.
3929 o Major bugfixes (crashes):
3930 - If a directory server runs out of space in the connection table
3931 as it's processing a begin_dir request, it will free the exit stream
3932 but leave it attached to the circuit, leading to unpredictable
3933 behavior. (Reported by seeess, fixes bug 425.)
3934 - Fix a bug in dirserv_remove_invalid() that would cause authorities
3935 to corrupt memory under some really unlikely scenarios.
3936 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
3937 - Avoid segfaults when reading from mmaped descriptor file. (Reported
3940 o Major bugfixes (security):
3941 - When choosing an entry guard for a circuit, avoid using guards
3942 that are in the same family as the chosen exit -- not just guards
3943 that are exactly the chosen exit. (Reported by lodger.)
3945 o Major bugfixes (resource management):
3946 - If a directory authority is down, skip it when deciding where to get
3947 networkstatus objects or descriptors. Otherwise we keep asking
3948 every 10 seconds forever. Fixes bug 384.
3949 - Count it as a failure if we fetch a valid network-status but we
3950 don't want to keep it. Otherwise we'll keep fetching it and keep
3951 not wanting to keep it. Fixes part of bug 422.
3952 - If all of our dirservers have given us bad or no networkstatuses
3953 lately, then stop hammering them once per minute even when we
3954 think they're failed. Fixes another part of bug 422.
3957 - Actually set the purpose correctly for descriptors inserted with
3959 - When we have k non-v2 authorities in our DirServer config,
3960 we ignored the last k authorities in the list when updating our
3962 - Correctly back-off from requesting router descriptors that we are
3963 having a hard time downloading.
3964 - Read resolv.conf files correctly on platforms where read() returns
3965 partial results on small file reads.
3966 - Don't rebuild the entire router store every time we get 32K of
3967 routers: rebuild it when the journal gets very large, or when
3968 the gaps in the store get very large.
3971 - When routers publish SVN revisions in their router descriptors,
3972 authorities now include those versions correctly in networkstatus
3974 - Warn when using a version of libevent before 1.3b to run a server on
3975 OSX or BSD: these versions interact badly with userspace threads.
3978 Changes in version 0.1.2.13 - 2007-04-24
3979 This release features some major anonymity fixes, such as safer path
3980 selection; better client performance; faster bootstrapping, better
3981 address detection, and better DNS support for servers; write limiting as
3982 well as read limiting to make servers easier to run; and a huge pile of
3983 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
3985 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
3986 of the Freenode IRC network, remembering his patience and vision for
3987 free speech on the Internet.
3990 - Fix a memory leak when we ask for "all" networkstatuses and we
3991 get one we don't recognize.
3992 - Add more asserts to hunt down bug 417.
3993 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
3996 Changes in version 0.1.2.12-rc - 2007-03-16
3998 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
3999 directory information requested inside Tor connections (i.e. via
4000 begin_dir cells). It only triggered when the same connection was
4001 serving other data at the same time. Reported by seeess.
4004 - When creating a circuit via the controller, send a 'launched'
4005 event when we're done, so we follow the spec better.
4008 Changes in version 0.1.2.11-rc - 2007-03-15
4009 o Minor bugfixes (controller), reported by daejees:
4010 - Correct the control spec to match how the code actually responds
4011 to 'getinfo addr-mappings/*'.
4012 - The control spec described a GUARDS event, but the code
4013 implemented a GUARD event. Standardize on GUARD, but let people
4017 Changes in version 0.1.2.10-rc - 2007-03-07
4018 o Major bugfixes (Windows):
4019 - Do not load the NT services library functions (which may not exist)
4020 just to detect if we're a service trying to shut down. Now we run
4021 on Win98 and friends again.
4023 o Minor bugfixes (other):
4024 - Clarify a couple of log messages.
4025 - Fix a misleading socks5 error number.
4028 Changes in version 0.1.2.9-rc - 2007-03-02
4029 o Major bugfixes (Windows):
4030 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
4031 of the usual GCC "%llu". This prevents a bug when saving 64-bit
4032 int configuration values: the high-order 32 bits would get
4033 truncated. In particular, we were being bitten by the default
4034 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
4035 and maybe also bug 397.)
4037 o Minor bugfixes (performance):
4038 - Use OpenSSL's AES implementation on platforms where it's faster.
4039 This could save us as much as 10% CPU usage.
4041 o Minor bugfixes (server):
4042 - Do not rotate onion key immediately after setting it for the first
4045 o Minor bugfixes (directory authorities):
4046 - Stop calling servers that have been hibernating for a long time
4047 "stable". Also, stop letting hibernating or obsolete servers affect
4048 uptime and bandwidth cutoffs.
4049 - Stop listing hibernating servers in the v1 directory.
4051 o Minor bugfixes (hidden services):
4052 - Upload hidden service descriptors slightly less often, to reduce
4053 load on authorities.
4055 o Minor bugfixes (other):
4056 - Fix an assert that could trigger if a controller quickly set then
4057 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
4058 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
4060 - Fix a potential race condition in the rpm installer. Found by
4062 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
4063 of 2 as indicating that the server is completely bad; it sometimes
4064 means that the server is just bad for the request in question. (may fix
4065 the last of bug 326.)
4066 - Disable encrypted directory connections when we don't have a server
4067 descriptor for the destination. We'll get this working again in
4071 Changes in version 0.1.2.8-beta - 2007-02-26
4072 o Major bugfixes (crashes):
4073 - Stop crashing when the controller asks us to resetconf more than
4074 one config option at once. (Vidalia 0.0.11 does this.)
4075 - Fix a crash that happened on Win98 when we're given command-line
4076 arguments: don't try to load NT service functions from advapi32.dll
4077 except when we need them. (Bug introduced in 0.1.2.7-alpha;
4079 - Fix a longstanding obscure crash bug that could occur when
4080 we run out of DNS worker processes. (Resolves bug 390.)
4082 o Major bugfixes (hidden services):
4083 - Correctly detect whether hidden service descriptor downloads are
4084 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
4086 o Major bugfixes (accounting):
4087 - When we start during an accounting interval before it's time to wake
4088 up, remember to wake up at the correct time. (May fix bug 342.)
4090 o Minor bugfixes (controller):
4091 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
4092 clear the corresponding on_circuit variable, and remember later
4093 that we don't need to send a redundant CLOSED event. (Resolves part
4095 - Report events where a resolve succeeded or where we got a socks
4096 protocol error correctly, rather than calling both of them
4098 - Change reported stream target addresses to IP consistently when
4099 we finally get the IP from an exit node.
4100 - Send log messages to the controller even if they happen to be very
4103 o Minor bugfixes (other):
4104 - Display correct results when reporting which versions are
4105 recommended, and how recommended they are. (Resolves bug 383.)
4106 - Improve our estimates for directory bandwidth to be less random:
4107 guess that an unrecognized directory will have the average bandwidth
4108 from all known directories, not that it will have the average
4109 bandwidth from those directories earlier than it on the list.
4110 - If we start a server with ClientOnly 1, then set ClientOnly to 0
4111 and hup, stop triggering an assert based on an empty onion_key.
4112 - On platforms with no working mmap() equivalent, don't warn the
4113 user when cached-routers doesn't exist.
4114 - Warn the user when mmap() [or its equivalent] fails for some reason
4115 other than file-not-found.
4116 - Don't warn the user when cached-routers.new doesn't exist: that's
4117 perfectly fine when starting up for the first time.
4118 - When EntryNodes are configured, rebuild the guard list to contain,
4119 in order: the EntryNodes that were guards before; the rest of the
4120 EntryNodes; the nodes that were guards before.
4121 - Mask out all signals in sub-threads; only the libevent signal
4122 handler should be processing them. This should prevent some crashes
4123 on some machines using pthreads. (Patch from coderman.)
4124 - Fix switched arguments on memset in the implementation of
4125 tor_munmap() for systems with no mmap() call.
4126 - When Tor receives a router descriptor that it asked for, but
4127 no longer wants (because it has received fresh networkstatuses
4128 in the meantime), do not warn the user. Cache the descriptor if
4129 we're a cache; drop it if we aren't.
4130 - Make earlier entry guards _really_ get retried when the network
4132 - On a malformed DNS reply, always give an error to the corresponding
4134 - Build with recent libevents on platforms that do not define the
4135 nonstandard types "u_int8_t" and friends.
4137 o Minor features (controller):
4138 - Warn the user when an application uses the obsolete binary v0
4139 control protocol. We're planning to remove support for it during
4140 the next development series, so it's good to give people some
4142 - Add STREAM_BW events to report per-entry-stream bandwidth
4143 use. (Patch from Robert Hogan.)
4144 - Rate-limit SIGNEWNYM signals in response to controllers that
4145 impolitely generate them for every single stream. (Patch from
4146 mwenge; closes bug 394.)
4147 - Make REMAP stream events have a SOURCE (cache or exit), and
4148 make them generated in every case where we get a successful
4149 connected or resolved cell.
4151 o Minor bugfixes (performance):
4152 - Call router_have_min_dir_info half as often. (This is showing up in
4153 some profiles, but not others.)
4154 - When using GCC, make log_debug never get called at all, and its
4155 arguments never get evaluated, when no debug logs are configured.
4156 (This is showing up in some profiles, but not others.)
4159 - Remove some never-implemented options. Mark PathlenCoinWeight as
4161 - Implement proposal 106: Stop requiring clients to have well-formed
4162 certificates; stop checking nicknames in certificates. (Clients
4163 have certificates so that they can look like Tor servers, but in
4164 the future we might want to allow them to look like regular TLS
4165 clients instead. Nicknames in certificates serve no purpose other
4166 than making our protocol easier to recognize on the wire.)
4167 - Revise messages on handshake failure again to be even more clear about
4168 which are incoming connections and which are outgoing.
4169 - Discard any v1 directory info that's over 1 month old (for
4170 directories) or over 1 week old (for running-routers lists).
4171 - Do not warn when individual nodes in the configuration's EntryNodes,
4172 ExitNodes, etc are down: warn only when all possible nodes
4173 are down. (Fixes bug 348.)
4174 - Always remove expired routers and networkstatus docs before checking
4175 whether we have enough information to build circuits. (Fixes
4177 - Put a lower-bound on MaxAdvertisedBandwidth.
4180 Changes in version 0.1.2.7-alpha - 2007-02-06
4181 o Major bugfixes (rate limiting):
4182 - Servers decline directory requests much more aggressively when
4183 they're low on bandwidth. Otherwise they end up queueing more and
4184 more directory responses, which can't be good for latency.
4185 - But never refuse directory requests from local addresses.
4186 - Fix a memory leak when sending a 503 response for a networkstatus
4188 - Be willing to read or write on local connections (e.g. controller
4189 connections) even when the global rate limiting buckets are empty.
4190 - If our system clock jumps back in time, don't publish a negative
4191 uptime in the descriptor. Also, don't let the global rate limiting
4192 buckets go absurdly negative.
4193 - Flush local controller connection buffers periodically as we're
4194 writing to them, so we avoid queueing 4+ megabytes of data before
4197 o Major bugfixes (NT services):
4198 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
4199 command-line flag so that admins can override the default by saying
4200 "tor --service install --user "SomeUser"". This will not affect
4201 existing installed services. Also, warn the user that the service
4202 will look for its configuration file in the service user's
4203 %appdata% directory. (We can't do the 'hardwire the user's appdata
4204 directory' trick any more, since we may not have read access to that
4207 o Major bugfixes (other):
4208 - Previously, we would cache up to 16 old networkstatus documents
4209 indefinitely, if they came from nontrusted authorities. Now we
4210 discard them if they are more than 10 days old.
4211 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
4213 - Detect and reject malformed DNS responses containing circular
4215 - If exits are rare enough that we're not marking exits as guards,
4216 ignore exit bandwidth when we're deciding the required bandwidth
4218 - When we're handling a directory connection tunneled over Tor,
4219 don't fill up internal memory buffers with all the data we want
4220 to tunnel; instead, only add it if the OR connection that will
4221 eventually receive it has some room for it. (This can lead to
4222 slowdowns in tunneled dir connections; a better solution will have
4225 o Minor bugfixes (dns):
4226 - Add some defensive programming to eventdns.c in an attempt to catch
4227 possible memory-stomping bugs.
4228 - Detect and reject DNS replies containing IPv4 or IPv6 records with
4229 an incorrect number of bytes. (Previously, we would ignore the
4231 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
4232 in the correct order, and doesn't crash.
4233 - Free memory held in recently-completed DNS lookup attempts on exit.
4234 This was not a memory leak, but may have been hiding memory leaks.
4235 - Handle TTL values correctly on reverse DNS lookups.
4236 - Treat failure to parse resolv.conf as an error.
4238 o Minor bugfixes (other):
4239 - Fix crash with "tor --list-fingerprint" (reported by seeess).
4240 - When computing clock skew from directory HTTP headers, consider what
4241 time it was when we finished asking for the directory, not what
4243 - Expire socks connections if they spend too long waiting for the
4244 handshake to finish. Previously we would let them sit around for
4245 days, if the connecting application didn't close them either.
4246 - And if the socks handshake hasn't started, don't send a
4247 "DNS resolve socks failed" handshake reply; just close it.
4248 - Stop using C functions that OpenBSD's linker doesn't like.
4249 - Don't launch requests for descriptors unless we have networkstatuses
4250 from at least half of the authorities. This delays the first
4251 download slightly under pathological circumstances, but can prevent
4252 us from downloading a bunch of descriptors we don't need.
4253 - Do not log IPs with TLS failures for incoming TLS
4254 connections. (Fixes bug 382.)
4255 - If the user asks to use invalid exit nodes, be willing to use
4257 - Stop using the reserved ac_cv namespace in our configure script.
4258 - Call stat() slightly less often; use fstat() when possible.
4259 - Refactor the way we handle pending circuits when an OR connection
4260 completes or fails, in an attempt to fix a rare crash bug.
4261 - Only rewrite a conn's address based on X-Forwarded-For: headers
4262 if it's a parseable public IP address; and stop adding extra quotes
4263 to the resulting address.
4266 - Weight directory requests by advertised bandwidth. Now we can
4267 let servers enable write limiting but still allow most clients to
4268 succeed at their directory requests. (We still ignore weights when
4269 choosing a directory authority; I hope this is a feature.)
4272 - Create a new file ReleaseNotes which was the old ChangeLog. The
4273 new ChangeLog file now includes the summaries for all development
4275 - Check for addresses with invalid characters at the exit as well
4276 as at the client, and warn less verbosely when they fail. You can
4277 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
4278 - Adapt a patch from goodell to let the contrib/exitlist script
4279 take arguments rather than require direct editing.
4280 - Inform the server operator when we decide not to advertise a
4281 DirPort due to AccountingMax enabled or a low BandwidthRate. It
4282 was confusing Zax, so now we're hopefully more helpful.
4283 - Bring us one step closer to being able to establish an encrypted
4284 directory tunnel without knowing a descriptor first. Still not
4285 ready yet. As part of the change, now assume we can use a
4286 create_fast cell if we don't know anything about a router.
4287 - Allow exit nodes to use nameservers running on ports other than 53.
4288 - Servers now cache reverse DNS replies.
4289 - Add an --ignore-missing-torrc command-line option so that we can
4290 get the "use sensible defaults if the configuration file doesn't
4291 exist" behavior even when specifying a torrc location on the command
4294 o Minor features (controller):
4295 - Track reasons for OR connection failure; make these reasons
4296 available via the controller interface. (Patch from Mike Perry.)
4297 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
4298 can learn when clients are sending malformed hostnames to Tor.
4299 - Clean up documentation for controller status events.
4300 - Add a REMAP status to stream events to note that a stream's
4301 address has changed because of a cached address or a MapAddress
4305 Changes in version 0.1.2.6-alpha - 2007-01-09
4307 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
4308 connection handles more than 4 gigs in either direction, we crash.
4309 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
4310 advertised exit node, somebody might try to exit from us when
4311 we're bootstrapping and before we've built our descriptor yet.
4312 Refuse the connection rather than crashing.
4315 - Warn if we (as a server) find that we've resolved an address that we
4316 weren't planning to resolve.
4317 - Warn that using select() on any libevent version before 1.1 will be
4318 unnecessarily slow (even for select()).
4319 - Flush ERR-level controller status events just like we currently
4320 flush ERR-level log events, so that a Tor shutdown doesn't prevent
4321 the controller from learning about current events.
4323 o Minor features (more controller status events):
4324 - Implement EXTERNAL_ADDRESS server status event so controllers can
4325 learn when our address changes.
4326 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
4327 can learn when directories reject our descriptor.
4328 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
4329 can learn when a client application is speaking a non-socks protocol
4331 - Implement DANGEROUS_SOCKS client status event so controllers
4332 can learn when a client application is leaking DNS addresses.
4333 - Implement BUG general status event so controllers can learn when
4334 Tor is unhappy about its internal invariants.
4335 - Implement CLOCK_SKEW general status event so controllers can learn
4336 when Tor thinks the system clock is set incorrectly.
4337 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
4338 server status events so controllers can learn when their descriptors
4339 are accepted by a directory.
4340 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
4341 server status events so controllers can learn about Tor's progress in
4342 deciding whether it's reachable from the outside.
4343 - Implement BAD_LIBEVENT general status event so controllers can learn
4344 when we have a version/method combination in libevent that needs to
4346 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
4347 and DNS_USELESS server status events so controllers can learn
4348 about changes to DNS server status.
4350 o Minor features (directory):
4351 - Authorities no longer recommend exits as guards if this would shift
4352 too much load to the exit nodes.
4355 Changes in version 0.1.2.5-alpha - 2007-01-06
4357 - Enable write limiting as well as read limiting. Now we sacrifice
4358 capacity if we're pushing out lots of directory traffic, rather
4359 than overrunning the user's intended bandwidth limits.
4360 - Include TLS overhead when counting bandwidth usage; previously, we
4361 would count only the bytes sent over TLS, but not the bytes used
4363 - Support running the Tor service with a torrc not in the same
4364 directory as tor.exe and default to using the torrc located in
4365 the %appdata%\Tor\ of the user who installed the service. Patch
4367 - Servers now check for the case when common DNS requests are going to
4368 wildcarded addresses (i.e. all getting the same answer), and change
4369 their exit policy to reject *:* if it's happening.
4370 - Implement BEGIN_DIR cells, so we can connect to the directory
4371 server via TLS to do encrypted directory requests rather than
4372 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
4373 config options if you like.
4375 o Minor features (config and docs):
4376 - Start using the state file to store bandwidth accounting data:
4377 the bw_accounting file is now obsolete. We'll keep generating it
4378 for a while for people who are still using 0.1.2.4-alpha.
4379 - Try to batch changes to the state file so that we do as few
4380 disk writes as possible while still storing important things in
4382 - The state file and the bw_accounting file get saved less often when
4383 the AvoidDiskWrites config option is set.
4384 - Make PIDFile work on Windows (untested).
4385 - Add internal descriptions for a bunch of configuration options:
4386 accessible via controller interface and in comments in saved
4388 - Reject *:563 (NNTPS) in the default exit policy. We already reject
4389 NNTP by default, so this seems like a sensible addition.
4390 - Clients now reject hostnames with invalid characters. This should
4391 avoid some inadvertent info leaks. Add an option
4392 AllowNonRFC953Hostnames to disable this behavior, in case somebody
4393 is running a private network with hosts called @, !, and #.
4394 - Add a maintainer script to tell us which options are missing
4395 documentation: "make check-docs".
4396 - Add a new address-spec.txt document to describe our special-case
4397 addresses: .exit, .onion, and .noconnnect.
4399 o Minor features (DNS):
4400 - Ongoing work on eventdns infrastructure: now it has dns server
4401 and ipv6 support. One day Tor will make use of it.
4402 - Add client-side caching for reverse DNS lookups.
4403 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
4404 - When we change nameservers or IP addresses, reset and re-launch
4405 our tests for DNS hijacking.
4407 o Minor features (directory):
4408 - Authorities now specify server versions in networkstatus. This adds
4409 about 2% to the size of compressed networkstatus docs, and allows
4410 clients to tell which servers support BEGIN_DIR and which don't.
4411 The implementation is forward-compatible with a proposed future
4412 protocol version scheme not tied to Tor versions.
4413 - DirServer configuration lines now have an orport= option so
4414 clients can open encrypted tunnels to the authorities without
4415 having downloaded their descriptors yet. Enabled for moria1,
4416 moria2, tor26, and lefkada now in the default configuration.
4417 - Directory servers are more willing to send a 503 "busy" if they
4418 are near their write limit, especially for v1 directory requests.
4419 Now they can use their limited bandwidth for actual Tor traffic.
4420 - Clients track responses with status 503 from dirservers. After a
4421 dirserver has given us a 503, we try not to use it until an hour has
4422 gone by, or until we have no dirservers that haven't given us a 503.
4423 - When we get a 503 from a directory, and we're not a server, we don't
4424 count the failure against the total number of failures allowed
4425 for the thing we're trying to download.
4426 - Report X-Your-Address-Is correctly from tunneled directory
4427 connections; don't report X-Your-Address-Is when it's an internal
4428 address; and never believe reported remote addresses when they're
4430 - Protect against an unlikely DoS attack on directory servers.
4431 - Add a BadDirectory flag to network status docs so that authorities
4432 can (eventually) tell clients about caches they believe to be
4435 o Minor features (controller):
4436 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
4437 - Reimplement GETINFO so that info/names stays in sync with the
4439 - Implement "GETINFO fingerprint".
4440 - Implement "SETEVENTS GUARD" so controllers can get updates on
4441 entry guard status as it changes.
4443 o Minor features (clean up obsolete pieces):
4444 - Remove some options that have been deprecated since at least
4445 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
4446 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
4448 - We no longer look for identity and onion keys in "identity.key" and
4449 "onion.key" -- these were replaced by secret_id_key and
4450 secret_onion_key in 0.0.8pre1.
4451 - We no longer require unrecognized directory entries to be
4454 o Major bugfixes (security):
4455 - Stop sending the HttpProxyAuthenticator string to directory
4456 servers when directory connections are tunnelled through Tor.
4457 - Clients no longer store bandwidth history in the state file.
4458 - Do not log introduction points for hidden services if SafeLogging
4460 - When generating bandwidth history, round down to the nearest
4461 1k. When storing accounting data, round up to the nearest 1k.
4462 - When we're running as a server, remember when we last rotated onion
4463 keys, so that we will rotate keys once they're a week old even if
4464 we never stay up for a week ourselves.
4466 o Major bugfixes (other):
4467 - Fix a longstanding bug in eventdns that prevented the count of
4468 timed-out resolves from ever being reset. This bug caused us to
4469 give up on a nameserver the third time it timed out, and try it
4470 10 seconds later... and to give up on it every time it timed out
4472 - Take out the '5 second' timeout from the connection retry
4473 schedule. Now the first connect attempt will wait a full 10
4474 seconds before switching to a new circuit. Perhaps this will help
4475 a lot. Based on observations from Mike Perry.
4476 - Fix a bug on the Windows implementation of tor_mmap_file() that
4477 would prevent the cached-routers file from ever loading. Reported
4481 - Fix an assert failure when a directory authority sets
4482 AuthDirRejectUnlisted and then receives a descriptor from an
4483 unlisted router. Reported by seeess.
4484 - Avoid a double-free when parsing malformed DirServer lines.
4485 - Fix a bug when a BSD-style PF socket is first used. Patch from
4487 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
4488 to resolve an address at a given exit node even when they ask for
4490 - Servers no longer ever list themselves in their "family" line,
4491 even if configured to do so. This makes it easier to configure
4492 family lists conveniently.
4493 - When running as a server, don't fall back to 127.0.0.1 when no
4494 nameservers are configured in /etc/resolv.conf; instead, make the
4495 user fix resolv.conf or specify nameservers explicitly. (Resolves
4497 - Stop accepting certain malformed ports in configured exit policies.
4498 - Don't re-write the fingerprint file every restart, unless it has
4500 - Stop warning when a single nameserver fails: only warn when _all_ of
4501 our nameservers have failed. Also, when we only have one nameserver,
4502 raise the threshold for deciding that the nameserver is dead.
4503 - Directory authorities now only decide that routers are reachable
4504 if their identity keys are as expected.
4505 - When the user uses bad syntax in the Log config line, stop
4506 suggesting other bad syntax as a replacement.
4507 - Correctly detect ipv6 DNS capability on OpenBSD.
4509 o Minor bugfixes (controller):
4510 - Report the circuit number correctly in STREAM CLOSED events. Bug
4511 reported by Mike Perry.
4512 - Do not report bizarre values for results of accounting GETINFOs
4513 when the last second's write or read exceeds the allotted bandwidth.
4514 - Report "unrecognized key" rather than an empty string when the
4515 controller tries to fetch a networkstatus that doesn't exist.
4518 Changes in version 0.1.1.26 - 2006-12-14
4519 o Security bugfixes:
4520 - Stop sending the HttpProxyAuthenticator string to directory
4521 servers when directory connections are tunnelled through Tor.
4522 - Clients no longer store bandwidth history in the state file.
4523 - Do not log introduction points for hidden services if SafeLogging
4527 - Fix an assert failure when a directory authority sets
4528 AuthDirRejectUnlisted and then receives a descriptor from an
4529 unlisted router (reported by seeess).
4532 Changes in version 0.1.2.4-alpha - 2006-12-03
4534 - Add support for using natd; this allows FreeBSDs earlier than
4535 5.1.2 to have ipfw send connections through Tor without using
4536 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
4539 - Make all connections to addresses of the form ".noconnect"
4540 immediately get closed. This lets application/controller combos
4541 successfully test whether they're talking to the same Tor by
4542 watching for STREAM events.
4543 - Make cross.sh cross-compilation script work even when autogen.sh
4544 hasn't been run. (Patch from Michael Mohr.)
4545 - Statistics dumped by -USR2 now include a breakdown of public key
4546 operations, for profiling.
4549 - Fix a major leak when directory authorities parse their
4550 approved-routers list, a minor memory leak when we fail to pick
4551 an exit node, and a few rare leaks on errors.
4552 - Handle TransPort connections even when the server sends data before
4553 the client sends data. Previously, the connection would just hang
4554 until the client sent data. (Patch from tup based on patch from
4556 - Avoid assert failure when our cached-routers file is empty on
4560 - Don't log spurious warnings when we see a circuit close reason we
4561 don't recognize; it's probably just from a newer version of Tor.
4562 - Have directory authorities allow larger amounts of drift in uptime
4563 without replacing the server descriptor: previously, a server that
4564 restarted every 30 minutes could have 48 "interesting" descriptors
4566 - Start linking to the Tor specification and Tor reference manual
4567 correctly in the Windows installer.
4568 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4569 Tor/Privoxy we also uninstall Vidalia.
4570 - Resume building on Irix64, and fix a lot of warnings from its
4572 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
4573 when we're running as a client.
4576 Changes in version 0.1.1.25 - 2006-11-04
4578 - When a client asks us to resolve (rather than connect to)
4579 an address, and we have a cached answer, give them the cached
4580 answer. Previously, we would give them no answer at all.
4581 - We were building exactly the wrong circuits when we predict
4582 hidden service requirements, meaning Tor would have to build all
4583 its circuits on demand.
4584 - If none of our live entry guards have a high uptime, but we
4585 require a guard with a high uptime, try adding a new guard before
4586 we give up on the requirement. This patch should make long-lived
4587 connections more stable on average.
4588 - When testing reachability of our DirPort, don't launch new
4589 tests when there's already one in progress -- unreachable
4590 servers were stacking up dozens of testing streams.
4592 o Security bugfixes:
4593 - When the user sends a NEWNYM signal, clear the client-side DNS
4594 cache too. Otherwise we continue to act on previous information.
4597 - Avoid a memory corruption bug when creating a hash table for
4599 - Avoid possibility of controller-triggered crash when misusing
4600 certain commands from a v0 controller on platforms that do not
4601 handle printf("%s",NULL) gracefully.
4602 - Avoid infinite loop on unexpected controller input.
4603 - Don't log spurious warnings when we see a circuit close reason we
4604 don't recognize; it's probably just from a newer version of Tor.
4605 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4606 Tor/Privoxy we also uninstall Vidalia.
4609 Changes in version 0.1.2.3-alpha - 2006-10-29
4611 - Prepare for servers to publish descriptors less often: never
4612 discard a descriptor simply for being too old until either it is
4613 recommended by no authorities, or until we get a better one for
4614 the same router. Make caches consider retaining old recommended
4615 routers for even longer.
4616 - If most authorities set a BadExit flag for a server, clients
4617 don't think of it as a general-purpose exit. Clients only consider
4618 authorities that advertise themselves as listing bad exits.
4619 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
4620 headers for content, so that we can work better in the presence of
4621 caching HTTP proxies.
4622 - Allow authorities to list nodes as bad exits by fingerprint or by
4625 o Minor features, controller:
4626 - Add a REASON field to CIRC events; for backward compatibility, this
4627 field is sent only to controllers that have enabled the extended
4628 event format. Also, add additional reason codes to explain why
4629 a given circuit has been destroyed or truncated. (Patches from
4631 - Add a REMOTE_REASON field to extended CIRC events to tell the
4632 controller about why a remote OR told us to close a circuit.
4633 - Stream events also now have REASON and REMOTE_REASON fields,
4634 working much like those for circuit events.
4635 - There's now a GETINFO ns/... field so that controllers can ask Tor
4636 about the current status of a router.
4637 - A new event type "NS" to inform a controller when our opinion of
4638 a router's status has changed.
4639 - Add a GETINFO events/names and GETINFO features/names so controllers
4640 can tell which events and features are supported.
4641 - A new CLEARDNSCACHE signal to allow controllers to clear the
4642 client-side DNS cache without expiring circuits.
4644 o Security bugfixes:
4645 - When the user sends a NEWNYM signal, clear the client-side DNS
4646 cache too. Otherwise we continue to act on previous information.
4649 - Avoid sending junk to controllers or segfaulting when a controller
4650 uses EVENT_NEW_DESC with verbose nicknames.
4651 - Stop triggering asserts if the controller tries to extend hidden
4652 service circuits (reported by mwenge).
4653 - Avoid infinite loop on unexpected controller input.
4654 - When the controller does a "GETINFO network-status", tell it
4655 about even those routers whose descriptors are very old, and use
4656 long nicknames where appropriate.
4657 - Change NT service functions to be loaded on demand. This lets us
4658 build with MinGW without breaking Tor for Windows 98 users.
4659 - Do DirPort reachability tests less often, since a single test
4660 chews through many circuits before giving up.
4661 - In the hidden service example in torrc.sample, stop recommending
4662 esoteric and discouraged hidden service options.
4663 - When stopping an NT service, wait up to 10 sec for it to actually
4664 stop. (Patch from Matt Edman; resolves bug 295.)
4665 - Fix handling of verbose nicknames with ORCONN controller events:
4666 make them show up exactly when requested, rather than exactly when
4668 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
4669 printing a duplicate "$" in the keys we send (reported by mwenge).
4670 - Correctly set maximum connection limit on Cygwin. (This time
4672 - Try to detect Windows correctly when cross-compiling.
4673 - Detect the size of the routers file correctly even if it is
4674 corrupted (on systems without mmap) or not page-aligned (on systems
4675 with mmap). This bug was harmless.
4676 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
4677 to open a stream fails; now we do in more cases. This should
4678 make clients able to find a good exit faster in some cases, since
4679 unhandleable requests will now get an error rather than timing out.
4680 - Resolve two memory leaks when rebuilding the on-disk router cache
4681 (reported by fookoowa).
4682 - Clean up minor code warnings suggested by the MIPSpro C compiler,
4683 and reported by some Centos users.
4684 - Controller signals now work on non-Unix platforms that don't define
4685 SIGUSR1 and SIGUSR2 the way we expect.
4686 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
4687 values before failing, and always enables eventdns.
4688 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
4689 Try to fix this in configure.in by checking for most functions
4690 before we check for libevent.
4693 Changes in version 0.1.2.2-alpha - 2006-10-07
4695 - Make our async eventdns library on-by-default for Tor servers,
4696 and plan to deprecate the separate dnsworker threads.
4697 - Add server-side support for "reverse" DNS lookups (using PTR
4698 records so clients can determine the canonical hostname for a given
4699 IPv4 address). Only supported by servers using eventdns; servers
4700 now announce in their descriptors whether they support eventdns.
4701 - Specify and implement client-side SOCKS5 interface for reverse DNS
4702 lookups (see doc/socks-extensions.txt).
4703 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
4704 connect to directory servers through Tor. Previously, clients needed
4705 to find Tor exits to make private connections to directory servers.
4706 - Avoid choosing Exit nodes for entry or middle hops when the
4707 total bandwidth available from non-Exit nodes is much higher than
4708 the total bandwidth available from Exit nodes.
4709 - Workaround for name servers (like Earthlink's) that hijack failing
4710 DNS requests and replace the no-such-server answer with a "helpful"
4711 redirect to an advertising-driven search portal. Also work around
4712 DNS hijackers who "helpfully" decline to hijack known-invalid
4713 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
4714 lets you turn it off.
4715 - Send out a burst of long-range padding cells once we've established
4716 that we're reachable. Spread them over 4 circuits, so hopefully
4717 a few will be fast. This exercises our bandwidth and bootstraps
4718 us into the directory more quickly.
4720 o New/improved config options:
4721 - Add new config option "ResolvConf" to let the server operator
4722 choose an alternate resolve.conf file when using eventdns.
4723 - Add an "EnforceDistinctSubnets" option to control our "exclude
4724 servers on the same /16" behavior. It's still on by default; this
4725 is mostly for people who want to operate private test networks with
4726 all the machines on the same subnet.
4727 - If one of our entry guards is on the ExcludeNodes list, or the
4728 directory authorities don't think it's a good guard, treat it as
4729 if it were unlisted: stop using it as a guard, and throw it off
4730 the guards list if it stays that way for a long time.
4731 - Allow directory authorities to be marked separately as authorities
4732 for the v1 directory protocol, the v2 directory protocol, and
4733 as hidden service directories, to make it easier to retire old
4734 authorities. V1 authorities should set "HSAuthoritativeDir 1"
4735 to continue being hidden service authorities too.
4736 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
4738 o Minor features, controller:
4739 - Fix CIRC controller events so that controllers can learn the
4740 identity digests of non-Named servers used in circuit paths.
4741 - Let controllers ask for more useful identifiers for servers. Instead
4742 of learning identity digests for un-Named servers and nicknames
4743 for Named servers, the new identifiers include digest, nickname,
4744 and indication of Named status. Off by default; see control-spec.txt
4745 for more information.
4746 - Add a "getinfo address" controller command so it can display Tor's
4747 best guess to the user.
4748 - New controller event to alert the controller when our server
4749 descriptor has changed.
4750 - Give more meaningful errors on controller authentication failure.
4752 o Minor features, other:
4753 - When asked to resolve a hostname, don't use non-exit servers unless
4754 requested to do so. This allows servers with broken DNS to be
4755 useful to the network.
4756 - Divide eventdns log messages into warn and info messages.
4757 - Reserve the nickname "Unnamed" for routers that can't pick
4758 a hostname: any router can call itself Unnamed; directory
4759 authorities will never allocate Unnamed to any particular router;
4760 clients won't believe that any router is the canonical Unnamed.
4761 - Only include function names in log messages for info/debug messages.
4762 For notice/warn/err, the content of the message should be clear on
4763 its own, and printing the function name only confuses users.
4764 - Avoid some false positives during reachability testing: don't try
4765 to test via a server that's on the same /24 as us.
4766 - If we fail to build a circuit to an intended enclave, and it's
4767 not mandatory that we use that enclave, stop wanting it.
4768 - When eventdns is enabled, allow multithreaded builds on NetBSD and
4769 OpenBSD. (We had previously disabled threads on these platforms
4770 because they didn't have working thread-safe resolver functions.)
4772 o Major bugfixes, anonymity/security:
4773 - If a client asked for a server by name, and there's a named server
4774 in our network-status but we don't have its descriptor yet, we
4775 could return an unnamed server instead.
4776 - Fix NetBSD bug that could allow someone to force uninitialized RAM
4777 to be sent to a server's DNS resolver. This only affects NetBSD
4778 and other platforms that do not bounds-check tolower().
4779 - Reject (most) attempts to use Tor circuits with length one. (If
4780 many people start using Tor as a one-hop proxy, exit nodes become
4781 a more attractive target for compromise.)
4782 - Just because your DirPort is open doesn't mean people should be
4783 able to remotely teach you about hidden service descriptors. Now
4784 only accept rendezvous posts if you've got HSAuthoritativeDir set.
4786 o Major bugfixes, other:
4787 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
4788 - When a client asks the server to resolve (not connect to)
4789 an address, and it has a cached answer, give them the cached answer.
4790 Previously, the server would give them no answer at all.
4791 - Allow really slow clients to not hang up five minutes into their
4792 directory downloads (suggested by Adam J. Richter).
4793 - We were building exactly the wrong circuits when we anticipated
4794 hidden service requirements, meaning Tor would have to build all
4795 its circuits on demand.
4796 - Avoid crashing when we mmap a router cache file of size 0.
4797 - When testing reachability of our DirPort, don't launch new
4798 tests when there's already one in progress -- unreachable
4799 servers were stacking up dozens of testing streams.
4801 o Minor bugfixes, correctness:
4802 - If we're a directory mirror and we ask for "all" network status
4803 documents, we would discard status documents from authorities
4805 - Avoid a memory corruption bug when creating a hash table for
4807 - Avoid controller-triggered crash when misusing certain commands
4808 from a v0 controller on platforms that do not handle
4809 printf("%s",NULL) gracefully.
4810 - Don't crash when a controller sends a third argument to an
4811 "extendcircuit" request.
4812 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4813 response; fix error code when "getinfo dir/status/" fails.
4814 - Avoid crash when telling controller stream-status and a stream
4816 - Patch from Adam Langley to fix assert() in eventdns.c.
4817 - Fix a debug log message in eventdns to say "X resolved to Y"
4818 instead of "X resolved to X".
4819 - Make eventdns give strings for DNS errors, not just error numbers.
4820 - Track unreachable entry guards correctly: don't conflate
4821 'unreachable by us right now' with 'listed as down by the directory
4822 authorities'. With the old code, if a guard was unreachable by
4823 us but listed as running, it would clog our guard list forever.
4824 - Behave correctly in case we ever have a network with more than
4825 2GB/s total advertised capacity.
4826 - Make TrackExitHosts case-insensitive, and fix the behavior of
4827 ".suffix" TrackExitHosts items to avoid matching in the middle of
4829 - Finally fix the openssl warnings from newer gccs that believe that
4830 ignoring a return value is okay, but casting a return value and
4831 then ignoring it is a sign of madness.
4832 - Prevent the contrib/exitlist script from printing the same
4833 result more than once.
4834 - Patch from Steve Hildrey: Generate network status correctly on
4835 non-versioning dirservers.
4836 - Don't listen to the X-Your-Address-Is hint if you did the lookup
4837 via Tor; otherwise you'll think you're the exit node's IP address.
4839 o Minor bugfixes, performance:
4840 - Two small performance improvements on parsing descriptors.
4841 - Major performance improvement on inserting descriptors: change
4842 algorithm from O(n^2) to O(n).
4843 - Make the common memory allocation path faster on machines where
4844 malloc(0) returns a pointer.
4845 - Start remembering X-Your-Address-Is directory hints even if you're
4846 a client, so you can become a server more smoothly.
4847 - Avoid duplicate entries on MyFamily line in server descriptor.
4849 o Packaging, features:
4850 - Remove architecture from OS X builds. The official builds are
4851 now universal binaries.
4852 - The Debian package now uses --verify-config when (re)starting,
4853 to distinguish configuration errors from other errors.
4854 - Update RPMs to require libevent 1.1b.
4856 o Packaging, bugfixes:
4857 - Patches so Tor builds with MinGW on Windows.
4858 - Patches so Tor might run on Cygwin again.
4859 - Resume building on non-gcc compilers and ancient gcc. Resume
4860 building with the -O0 compile flag. Resume building cleanly on
4862 - Run correctly on OS X platforms with case-sensitive filesystems.
4863 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
4864 - Add autoconf checks so Tor can build on Solaris x86 again.
4867 - Documented (and renamed) ServerDNSSearchDomains and
4868 ServerDNSResolvConfFile options.
4869 - Be clearer that the *ListenAddress directives can be repeated
4873 Changes in version 0.1.1.24 - 2006-09-29
4875 - Allow really slow clients to not hang up five minutes into their
4876 directory downloads (suggested by Adam J. Richter).
4877 - Fix major performance regression from 0.1.0.x: instead of checking
4878 whether we have enough directory information every time we want to
4879 do something, only check when the directory information has changed.
4880 This should improve client CPU usage by 25-50%.
4881 - Don't crash if, after a server has been running for a while,
4882 it can't resolve its hostname.
4885 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4886 - Don't crash when the controller receives a third argument to an
4887 "extendcircuit" request.
4888 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4889 response; fix error code when "getinfo dir/status/" fails.
4890 - Fix configure.in to not produce broken configure files with
4891 more recent versions of autoconf. Thanks to Clint for his auto*
4893 - Fix security bug on NetBSD that could allow someone to force
4894 uninitialized RAM to be sent to a server's DNS resolver. This
4895 only affects NetBSD and other platforms that do not bounds-check
4897 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
4898 methods: these are known to be buggy.
4899 - If we're a directory mirror and we ask for "all" network status
4900 documents, we would discard status documents from authorities
4904 Changes in version 0.1.2.1-alpha - 2006-08-27
4906 - Add "eventdns" async dns library from Adam Langley, tweaked to
4907 build on OSX and Windows. Only enabled if you pass the
4908 --enable-eventdns argument to configure.
4909 - Allow servers with no hostname or IP address to learn their
4910 IP address by asking the directory authorities. This code only
4911 kicks in when you would normally have exited with a "no address"
4912 error. Nothing's authenticated, so use with care.
4913 - Rather than waiting a fixed amount of time between retrying
4914 application connections, we wait only 5 seconds for the first,
4915 10 seconds for the second, and 15 seconds for each retry after
4916 that. Hopefully this will improve the expected user experience.
4917 - Patch from Tup to add support for transparent AP connections:
4918 this basically bundles the functionality of trans-proxy-tor
4919 into the Tor mainline. Now hosts with compliant pf/netfilter
4920 implementations can redirect TCP connections straight to Tor
4921 without diverting through SOCKS. Needs docs.
4922 - Busy directory servers save lots of memory by spooling server
4923 descriptors, v1 directories, and v2 networkstatus docs to buffers
4924 as needed rather than en masse. Also mmap the cached-routers
4925 files, so we don't need to keep the whole thing in memory too.
4926 - Automatically avoid picking more than one node from the same
4927 /16 network when constructing a circuit.
4928 - Revise and clean up the torrc.sample that we ship with; add
4929 a section for BandwidthRate and BandwidthBurst.
4932 - Split circuit_t into origin_circuit_t and or_circuit_t, and
4933 split connection_t into edge, or, dir, control, and base structs.
4934 These will save quite a bit of memory on busy servers, and they'll
4935 also help us track down bugs in the code and bugs in the spec.
4936 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
4937 or later. Log when we are doing this, so we can diagnose it when
4938 it fails. (Also, recommend libevent 1.1b for kqueue and
4939 win32 methods; deprecate libevent 1.0b harder; make libevent
4940 recommendation system saner.)
4941 - Start being able to build universal binaries on OS X (thanks
4943 - Export the default exit policy via the control port, so controllers
4944 don't need to guess what it is / will be later.
4945 - Add a man page entry for ProtocolWarnings.
4946 - Add TestVia config option to the man page.
4947 - Remove even more protocol-related warnings from Tor server logs,
4948 such as bad TLS handshakes and malformed begin cells.
4949 - Stop fetching descriptors if you're not a dir mirror and you
4950 haven't tried to establish any circuits lately. [This currently
4951 causes some dangerous behavior, because when you start up again
4952 you'll use your ancient server descriptors.]
4953 - New DirPort behavior: if you have your dirport set, you download
4954 descriptors aggressively like a directory mirror, whether or not
4956 - Get rid of the router_retry_connections notion. Now routers
4957 no longer try to rebuild long-term connections to directory
4958 authorities, and directory authorities no longer try to rebuild
4959 long-term connections to all servers. We still don't hang up
4960 connections in these two cases though -- we need to look at it
4961 more carefully to avoid flapping, and we likely need to wait til
4962 0.1.1.x is obsolete.
4963 - Drop compatibility with obsolete Tors that permit create cells
4964 to have the wrong circ_id_type.
4965 - Re-enable per-connection rate limiting. Get rid of the "OP
4966 bandwidth" concept. Lay groundwork for "bandwidth classes" --
4967 separate global buckets that apply depending on what sort of conn
4969 - Start publishing one minute or so after we find our ORPort
4970 to be reachable. This will help reduce the number of descriptors
4971 we have for ourselves floating around, since it's quite likely
4972 other things (e.g. DirPort) will change during that minute too.
4973 - Fork the v1 directory protocol into its own spec document,
4974 and mark dir-spec.txt as the currently correct (v2) spec.
4977 - When we find our DirPort to be reachable, publish a new descriptor
4978 so we'll tell the world (reported by pnx).
4979 - Publish a new descriptor after we hup/reload. This is important
4980 if our config has changed such that we'll want to start advertising
4981 our DirPort now, etc.
4982 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4983 - When we have a state file we cannot parse, tell the user and
4984 move it aside. Now we avoid situations where the user starts
4985 Tor in 1904, Tor writes a state file with that timestamp in it,
4986 the user fixes her clock, and Tor refuses to start.
4987 - Fix configure.in to not produce broken configure files with
4988 more recent versions of autoconf. Thanks to Clint for his auto*
4990 - "tor --verify-config" now exits with -1(255) or 0 depending on
4991 whether the config options are bad or good.
4992 - Resolve bug 321 when using dnsworkers: append a period to every
4993 address we resolve at the exit node, so that we do not accidentally
4994 pick up local addresses, and so that failing searches are retried
4995 in the resolver search domains. (This is already solved for
4996 eventdns.) (This breaks Blossom servers for now.)
4997 - If we are using an exit enclave and we can't connect, e.g. because
4998 its webserver is misconfigured to not listen on localhost, then
4999 back off and try connecting from somewhere else before we fail.
5002 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
5003 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
5004 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
5005 when the IP address is mapped through MapAddress to a hostname.
5006 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
5007 useless IPv6 DNS resolves.
5008 - Patch suggested by Karsten Loesing: respond to SIGNAL command
5009 before we execute the signal, in case the signal shuts us down.
5010 - Clean up AllowInvalidNodes man page entry.
5011 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
5012 - Add more asserts to track down an assert error on a windows Tor
5013 server with connection_add being called with socket == -1.
5014 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
5015 - Fix misleading log messages: an entry guard that is "unlisted",
5016 as well as not known to be "down" (because we've never heard
5017 of it), is not therefore "up".
5018 - Remove code to special-case "-cvs" ending, since it has not
5019 actually mattered since 0.0.9.
5020 - Make our socks5 handling more robust to broken socks clients:
5021 throw out everything waiting on the buffer in between socks
5022 handshake phases, since they can't possibly (so the theory
5023 goes) have predicted what we plan to respond to them.
5026 Changes in version 0.1.1.23 - 2006-07-30
5028 - Fast Tor servers, especially exit nodes, were triggering asserts
5029 due to a bug in handling the list of pending DNS resolves. Some
5030 bugs still remain here; we're hunting them.
5031 - Entry guards could crash clients by sending unexpected input.
5032 - More fixes on reachability testing: if you find yourself reachable,
5033 then don't ever make any client requests (so you stop predicting
5034 circuits), then hup or have your clock jump, then later your IP
5035 changes, you won't think circuits are working, so you won't try to
5036 test reachability, so you won't publish.
5039 - Avoid a crash if the controller does a resetconf firewallports
5040 and then a setconf fascistfirewall=1.
5041 - Avoid an integer underflow when the dir authority decides whether
5042 a router is stable: we might wrongly label it stable, and compute
5043 a slightly wrong median stability, when a descriptor is published
5045 - Fix a place where we might trigger an assert if we can't build our
5046 own server descriptor yet.
5049 Changes in version 0.1.1.22 - 2006-07-05
5051 - Fix a big bug that was causing servers to not find themselves
5052 reachable if they changed IP addresses. Since only 0.1.1.22+
5053 servers can do reachability testing correctly, now we automatically
5054 make sure to test via one of these.
5055 - Fix to allow clients and mirrors to learn directory info from
5056 descriptor downloads that get cut off partway through.
5057 - Directory authorities had a bug in deciding if a newly published
5058 descriptor was novel enough to make everybody want a copy -- a few
5059 servers seem to be publishing new descriptors many times a minute.
5061 - Fix a rare bug that was causing some servers to complain about
5062 "closing wedged cpuworkers" and skip some circuit create requests.
5063 - Make the Exit flag in directory status documents actually work.
5066 Changes in version 0.1.1.21 - 2006-06-10
5067 o Crash and assert fixes from 0.1.1.20:
5068 - Fix a rare crash on Tor servers that have enabled hibernation.
5069 - Fix a seg fault on startup for Tor networks that use only one
5070 directory authority.
5071 - Fix an assert from a race condition that occurs on Tor servers
5072 while exiting, where various threads are trying to log that they're
5073 exiting, and delete the logs, at the same time.
5074 - Make our unit tests pass again on certain obscure platforms.
5077 - Add support for building SUSE RPM packages.
5078 - Speed up initial bootstrapping for clients: if we are making our
5079 first ever connection to any entry guard, then don't mark it down
5081 - When only one Tor server in the network is labelled as a guard,
5082 and we've already picked him, we would cycle endlessly picking him
5083 again, being unhappy about it, etc. Now we specifically exclude
5084 current guards when picking a new guard.
5085 - Servers send create cells more reliably after the TLS connection
5086 is established: we were sometimes forgetting to send half of them
5087 when we had more than one pending.
5088 - If we get a create cell that asks us to extend somewhere, but the
5089 Tor server there doesn't match the expected digest, we now send
5090 a destroy cell back, rather than silently doing nothing.
5091 - Make options->RedirectExit work again.
5092 - Make cookie authentication for the controller work again.
5093 - Stop being picky about unusual characters in the arguments to
5094 mapaddress. It's none of our business.
5095 - Add a new config option "TestVia" that lets you specify preferred
5096 middle hops to use for test circuits. Perhaps this will let me
5097 debug the reachability problems better.
5099 o Log / documentation fixes:
5100 - If we're a server and some peer has a broken TLS certificate, don't
5101 log about it unless ProtocolWarnings is set, i.e., we want to hear
5102 about protocol violations by others.
5103 - Fix spelling of VirtualAddrNetwork in man page.
5104 - Add a better explanation at the top of the autogenerated torrc file
5105 about what happened to our old torrc.
5108 Changes in version 0.1.1.20 - 2006-05-23
5110 - Downgrade a log severity where servers complain that they're
5112 - Avoid a compile warning on FreeBSD.
5113 - Remove string size limit on NEWDESC messages; solve bug 291.
5114 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
5115 more thoroughly when we're running on windows.
5118 Changes in version 0.1.1.19-rc - 2006-05-03
5120 - Regenerate our local descriptor if it's dirty and we try to use
5121 it locally (e.g. if it changes during reachability detection).
5122 - If we setconf our ORPort to 0, we continued to listen on the
5123 old ORPort and receive connections.
5124 - Avoid a second warning about machine/limits.h on Debian
5126 - Be willing to add our own routerinfo into the routerlist.
5127 Now authorities will include themselves in their directories
5128 and network-statuses.
5129 - Stop trying to upload rendezvous descriptors to every
5130 directory authority: only try the v1 authorities.
5131 - Servers no longer complain when they think they're not
5132 registered with the directory authorities. There were too many
5134 - Backport dist-rpm changes so rpms can be built without errors.
5137 - Implement an option, VirtualAddrMask, to set which addresses
5138 get handed out in response to mapaddress requests. This works
5139 around a bug in tsocks where 127.0.0.0/8 is never socksified.
5142 Changes in version 0.1.1.18-rc - 2006-04-10
5144 - Work harder to download live network-statuses from all the
5145 directory authorities we know about. Improve the threshold
5146 decision logic so we're more robust to edge cases.
5147 - When fetching rendezvous descriptors, we were willing to ask
5148 v2 authorities too, which would always return 404.
5151 - Stop listing down or invalid nodes in the v1 directory. This will
5152 reduce its bulk by about 1/3, and reduce load on directory
5154 - When deciding whether a router is Fast or Guard-worthy, consider
5155 his advertised BandwidthRate and not just the BandwidthCapacity.
5156 - No longer ship INSTALL and README files -- they are useless now.
5157 - Force rpmbuild to behave and honor target_cpu.
5158 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
5159 - Start to include translated versions of the tor-doc-*.html
5160 files, along with the screenshots. Still needs more work.
5161 - Start sending back 512 and 451 errors if mapaddress fails,
5162 rather than not sending anything back at all.
5163 - When we fail to bind or listen on an incoming or outgoing
5164 socket, we should close it before failing. otherwise we just
5165 leak it. (thanks to weasel for finding.)
5166 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
5167 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
5168 - Make NoPublish (even though deprecated) work again.
5169 - Fix a minor security flaw where a versioning auth dirserver
5170 could list a recommended version many times in a row to make
5171 clients more convinced that it's recommended.
5172 - Fix crash bug if there are two unregistered servers running
5173 with the same nickname, one of them is down, and you ask for
5174 them by nickname in your EntryNodes or ExitNodes. Also, try
5175 to pick the one that's running rather than an arbitrary one.
5176 - Fix an infinite loop we could hit if we go offline for too long.
5177 - Complain when we hit WSAENOBUFS on recv() or write() too.
5178 Perhaps this will help us hunt the bug.
5179 - If you're not a versioning dirserver, don't put the string
5180 "client-versions \nserver-versions \n" in your network-status.
5181 - Lower the minimum required number of file descriptors to 1000,
5182 so we can have some overhead for Valgrind on Linux, where the
5183 default ulimit -n is 1024.
5186 - Add tor.dizum.com as the fifth authoritative directory server.
5187 - Add a new config option FetchUselessDescriptors, off by default,
5188 for when you plan to run "exitlist" on your client and you want
5189 to know about even the non-running descriptors.
5192 Changes in version 0.1.1.17-rc - 2006-03-28
5194 - Clients and servers since 0.1.1.10-alpha have been expiring
5195 connections whenever they are idle for 5 minutes and they *do*
5196 have circuits on them. Oops. With this new version, clients will
5197 discard their previous entry guard choices and avoid choosing
5198 entry guards running these flawed versions.
5199 - Fix memory leak when uncompressing concatenated zlib streams. This
5200 was causing substantial leaks over time on Tor servers.
5201 - The v1 directory was including servers as much as 48 hours old,
5202 because that's how the new routerlist->routers works. Now only
5203 include them if they're 20 hours old or less.
5206 - Resume building on irix64, netbsd 2.0, etc.
5207 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
5209 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
5210 and it is confusing some users.
5211 - Mirrors stop caching the v1 directory so often.
5212 - Make the max number of old descriptors that a cache will hold
5213 rise with the number of directory authorities, so we can scale.
5214 - Change our win32 uname() hack to be more forgiving about what
5215 win32 versions it thinks it's found.
5218 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
5220 - When the controller's *setconf commands fail, collect an error
5221 message in a string and hand it back to the controller.
5222 - Make the v2 dir's "Fast" flag based on relative capacity, just
5223 like "Stable" is based on median uptime. Name everything in the
5224 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
5225 - Log server fingerprint on startup, so new server operators don't
5226 have to go hunting around their filesystem for it.
5227 - Return a robots.txt on our dirport to discourage google indexing.
5228 - Let the controller ask for GETINFO dir/status/foo so it can ask
5229 directly rather than connecting to the dir port. Only works when
5230 dirport is set for now.
5232 o New config options rather than constants in the code:
5233 - SocksTimeout: How long do we let a socks connection wait
5234 unattached before we fail it?
5235 - CircuitBuildTimeout: Cull non-open circuits that were born
5236 at least this many seconds ago.
5237 - CircuitIdleTimeout: Cull open clean circuits that were born
5238 at least this many seconds ago.
5241 Changes in version 0.1.1.16-rc - 2006-03-18
5242 o Bugfixes on 0.1.1.15-rc:
5243 - Fix assert when the controller asks to attachstream a connect-wait
5244 or resolve-wait stream.
5245 - Now do address rewriting when the controller asks us to attach
5246 to a particular circuit too. This will let Blossom specify
5247 "moria2.exit" without having to learn what moria2's IP address is.
5248 - Make the "tor --verify-config" command-line work again, so people
5249 can automatically check if their torrc will parse.
5250 - Authoritative dirservers no longer require an open connection from
5251 a server to consider him "reachable". We need this change because
5252 when we add new auth dirservers, old servers won't know not to
5254 - Let Tor build on Sun CC again.
5255 - Fix an off-by-one buffer size in dirserv.c that magically never
5256 hit our three authorities but broke sjmurdoch's own tor network.
5257 - If we as a directory mirror don't know of any v1 directory
5258 authorities, then don't try to cache any v1 directories.
5259 - Stop warning about unknown servers in our family when they are
5260 given as hex digests.
5261 - Stop complaining as quickly to the server operator that he
5262 hasn't registered his nickname/key binding.
5263 - Various cleanups so we can add new V2 Auth Dirservers.
5264 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
5265 reflect the updated flags in our v2 dir protocol.
5266 - Resume allowing non-printable characters for exit streams (both
5267 for connecting and for resolving). Now we tolerate applications
5268 that don't follow the RFCs. But continue to block malformed names
5271 o Bugfixes on 0.1.0.x:
5272 - Fix assert bug in close_logs(): when we close and delete logs,
5273 remove them all from the global "logfiles" list.
5274 - Fix minor integer overflow in calculating when we expect to use up
5275 our bandwidth allocation before hibernating.
5276 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
5277 there are multiple SSLs installed with different versions.
5278 - When we try to be a server and Address is not explicitly set and
5279 our hostname resolves to a private IP address, try to use an
5280 interface address if it has a public address. Now Windows machines
5281 that think of themselves as localhost can work by default.
5284 - Let the controller ask for GETINFO dir/server/foo so it can ask
5285 directly rather than connecting to the dir port.
5286 - Let the controller tell us about certain router descriptors
5287 that it doesn't want Tor to use in circuits. Implement
5288 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
5289 - New config option SafeSocks to reject all application connections
5290 using unsafe socks protocols. Defaults to off.
5293 Changes in version 0.1.1.15-rc - 2006-03-11
5294 o Bugfixes and cleanups:
5295 - When we're printing strings from the network, don't try to print
5296 non-printable characters. This protects us against shell escape
5297 sequence exploits, and also against attacks to fool humans into
5298 misreading their logs.
5299 - Fix a bug where Tor would fail to establish any connections if you
5300 left it off for 24 hours and then started it: we were happy with
5301 the obsolete network statuses, but they all referred to router
5302 descriptors that were too old to fetch, so we ended up with no
5303 valid router descriptors.
5304 - Fix a seg fault in the controller's "getinfo orconn-status"
5305 command while listing status on incoming handshaking connections.
5306 Introduce a status name "NEW" for these connections.
5307 - If we get a linelist or linelist_s config option from the torrc
5308 (e.g. ExitPolicy) and it has no value, warn and skip rather than
5309 silently resetting it to its default.
5310 - Don't abandon entry guards until they've been down or gone for
5312 - Cleaner and quieter log messages.
5315 - New controller signal NEWNYM that makes new application requests
5317 - Add a new circuit purpose 'controller' to let the controller ask
5318 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
5319 controller command to let you specify the purpose if you're
5320 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
5321 command to let you change a circuit's purpose after it's been
5323 - Accept "private:*" in routerdesc exit policies; not generated yet
5324 because older Tors do not understand it.
5325 - Add BSD-style contributed startup script "rc.subr" from Peter
5329 Changes in version 0.1.1.14-alpha - 2006-02-20
5330 o Bugfixes on 0.1.1.x:
5331 - Don't die if we ask for a stdout or stderr log (even implicitly)
5332 and we're set to RunAsDaemon -- just warn.
5333 - We still had a few bugs in the OR connection rotation code that
5334 caused directory servers to slowly aggregate connections to other
5335 fast Tor servers. This time for sure!
5336 - Make log entries on Win32 include the name of the function again.
5337 - We were treating a pair of exit policies if they were equal even
5338 if one said accept and the other said reject -- causing us to
5339 not always publish a new descriptor since we thought nothing
5341 - Retry pending server downloads as well as pending networkstatus
5342 downloads when we unexpectedly get a socks request.
5343 - We were ignoring the IS_FAST flag in the directory status,
5344 meaning we were willing to pick trivial-bandwidth nodes for "fast"
5346 - If the controller's SAVECONF command fails (e.g. due to file
5347 permissions), let the controller know that it failed.
5350 - If we're trying to be a Tor server and running Windows 95/98/ME
5351 as a server, explain that we'll likely crash.
5352 - When we're a server, a client asks for an old-style directory,
5353 and our write bucket is empty, don't give it to him. This way
5354 small servers can continue to serve the directory *sometimes*,
5355 without getting overloaded.
5356 - Compress exit policies even more -- look for duplicate lines
5358 - Clients now honor the "guard" flag in the router status when
5359 picking entry guards, rather than looking at is_fast or is_stable.
5360 - Retain unrecognized lines in $DATADIR/state file, so that we can
5361 be forward-compatible.
5362 - Generate 18.0.0.0/8 address policy format in descs when we can;
5363 warn when the mask is not reducible to a bit-prefix.
5364 - Let the user set ControlListenAddress in the torrc. This can be
5365 dangerous, but there are some cases (like a secured LAN) where it
5367 - Split ReachableAddresses into ReachableDirAddresses and
5368 ReachableORAddresses, so we can restrict Dir conns to port 80
5369 and OR conns to port 443.
5370 - Now we can target arch and OS in rpm builds (contributed by
5371 Phobos). Also make the resulting dist-rpm filename match the
5373 - New config options to help controllers: FetchServerDescriptors
5374 and FetchHidServDescriptors for whether to fetch server
5375 info and hidserv info or let the controller do it, and
5376 PublishServerDescriptor and PublishHidServDescriptors.
5377 - Also let the controller set the __AllDirActionsPrivate config
5378 option if you want all directory fetches/publishes to happen via
5379 Tor (it assumes your controller bootstraps your circuits).
5382 Changes in version 0.1.0.17 - 2006-02-17
5383 o Crash bugfixes on 0.1.0.x:
5384 - When servers with a non-zero DirPort came out of hibernation,
5385 sometimes they would trigger an assert.
5387 o Other important bugfixes:
5388 - On platforms that don't have getrlimit (like Windows), we were
5389 artificially constraining ourselves to a max of 1024
5390 connections. Now just assume that we can handle as many as 15000
5391 connections. Hopefully this won't cause other problems.
5393 o Backported features:
5394 - When we're a server, a client asks for an old-style directory,
5395 and our write bucket is empty, don't give it to him. This way
5396 small servers can continue to serve the directory *sometimes*,
5397 without getting overloaded.
5398 - Whenever you get a 503 in response to a directory fetch, try
5399 once more. This will become important once servers start sending
5400 503's whenever they feel busy.
5401 - Fetch a new directory every 120 minutes, not every 40 minutes.
5402 Now that we have hundreds of thousands of users running the old
5403 directory algorithm, it's starting to hurt a lot.
5404 - Bump up the period for forcing a hidden service descriptor upload
5405 from 20 minutes to 1 hour.
5408 Changes in version 0.1.1.13-alpha - 2006-02-09
5409 o Crashes in 0.1.1.x:
5410 - When you tried to setconf ORPort via the controller, Tor would
5411 crash. So people using TorCP to become a server were sad.
5412 - Solve (I hope) the stack-smashing bug that we were seeing on fast
5413 servers. The problem appears to be something do with OpenSSL's
5414 random number generation, or how we call it, or something. Let me
5415 know if the crashes continue.
5416 - Turn crypto hardware acceleration off by default, until we find
5417 somebody smart who can test it for us. (It appears to produce
5418 seg faults in at least some cases.)
5419 - Fix a rare assert error when we've tried all intro points for
5420 a hidden service and we try fetching the service descriptor again:
5421 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
5424 - Fix a major load balance bug: we were round-robining in 16 KB
5425 chunks, and servers with bandwidthrate of 20 KB, while downloading
5426 a 600 KB directory, would starve their other connections. Now we
5427 try to be a bit more fair.
5428 - Dir authorities and mirrors were never expiring the newest
5429 descriptor for each server, causing memory and directory bloat.
5430 - Fix memory-bloating and connection-bloating bug on servers: We
5431 were never closing any connection that had ever had a circuit on
5432 it, because we were checking conn->n_circuits == 0, yet we had a
5433 bug that let it go negative.
5434 - Make Tor work using squid as your http proxy again -- squid
5435 returns an error if you ask for a URL that's too long, and it uses
5436 a really generic error message. Plus, many people are behind a
5437 transparent squid so they don't even realize it.
5438 - On platforms that don't have getrlimit (like Windows), we were
5439 artificially constraining ourselves to a max of 1024
5440 connections. Now just assume that we can handle as many as 15000
5441 connections. Hopefully this won't cause other problems.
5442 - Add a new config option ExitPolicyRejectPrivate which defaults to
5443 1. This means all exit policies will begin with rejecting private
5444 addresses, unless the server operator explicitly turns it off.
5447 - Clients no longer download descriptors for non-running
5449 - Before we add new directory authorities, we should make it
5450 clear that only v1 authorities should receive/publish hidden
5451 service descriptors.
5454 - As soon as we've fetched some more directory info, immediately
5455 try to download more server descriptors. This way we don't have
5456 a 10 second pause during initial bootstrapping.
5457 - Remove even more loud log messages that the server operator can't
5459 - When we're running an obsolete or un-recommended version, make
5460 the log message more clear about what the problem is and what
5461 versions *are* still recommended.
5462 - Provide a more useful warn message when our onion queue gets full:
5463 the CPU is too slow or the exit policy is too liberal.
5464 - Don't warn when we receive a 503 from a dirserver/cache -- this
5465 will pave the way for them being able to refuse if they're busy.
5466 - When we fail to bind a listener, try to provide a more useful
5467 log message: e.g., "Is Tor already running?"
5468 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
5469 Goldberg can prove things about our handshake protocol more
5471 - MaxConn has been obsolete for a while now. Document the ConnLimit
5472 config option, which is a *minimum* number of file descriptors
5473 that must be available else Tor refuses to start.
5474 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
5475 if you log to syslog and want something other than LOG_DAEMON.
5476 - Make dirservers generate a separate "guard" flag to mean,
5477 "would make a good entry guard". Make clients parse it and vote
5478 on it. Not used by clients yet.
5479 - Implement --with-libevent-dir option to ./configure. Also, improve
5480 search techniques to find libevent, and use those for openssl too.
5481 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
5482 - Only start testing reachability once we've established a
5483 circuit. This will make startup on dirservers less noisy.
5484 - Don't try to upload hidden service descriptors until we have
5485 established a circuit.
5486 - Fix the controller's "attachstream 0" command to treat conn like
5487 it just connected, doing address remapping, handling .exit and
5488 .onion idioms, and so on. Now we're more uniform in making sure
5489 that the controller hears about new and closing connections.
5492 Changes in version 0.1.1.12-alpha - 2006-01-11
5493 o Bugfixes on 0.1.1.x:
5494 - The fix to close duplicate server connections was closing all
5495 Tor client connections if they didn't establish a circuit
5496 quickly enough. Oops.
5497 - Fix minor memory issue (double-free) that happened on exit.
5499 o Bugfixes on 0.1.0.x:
5500 - Tor didn't warn when it failed to open a log file.
5503 Changes in version 0.1.1.11-alpha - 2006-01-10
5504 o Crashes in 0.1.1.x:
5505 - Include all the assert/crash fixes from 0.1.0.16.
5506 - If you start Tor and then quit very quickly, there were some
5507 races that tried to free things that weren't allocated yet.
5508 - Fix a rare memory stomp if you're running hidden services.
5509 - Fix segfault when specifying DirServer in config without nickname.
5510 - Fix a seg fault when you finish connecting to a server but at
5511 that moment you dump his server descriptor.
5512 - Extendcircuit and Attachstream controller commands would
5513 assert/crash if you don't give them enough arguments.
5514 - Fix an assert error when we're out of space in the connection_list
5515 and we try to post a hidden service descriptor (reported by weasel).
5516 - If you specify a relative torrc path and you set RunAsDaemon in
5517 your torrc, then it chdir()'s to the new directory. If you HUP,
5518 it tries to load the new torrc location, fails, and exits.
5519 The fix: no longer allow a relative path to torrc using -f.
5522 - Implement "entry guards": automatically choose a handful of entry
5523 nodes and stick with them for all circuits. Only pick new guards
5524 when the ones you have are unsuitable, and if the old guards
5525 become suitable again, switch back. This will increase security
5526 dramatically against certain end-point attacks. The EntryNodes
5527 config option now provides some hints about which entry guards you
5528 want to use most; and StrictEntryNodes means to only use those.
5529 - New directory logic: download by descriptor digest, not by
5530 fingerprint. Caches try to download all listed digests from
5531 authorities; clients try to download "best" digests from caches.
5532 This avoids partitioning and isolating attacks better.
5533 - Make the "stable" router flag in network-status be the median of
5534 the uptimes of running valid servers, and make clients pay
5535 attention to the network-status flags. Thus the cutoff adapts
5536 to the stability of the network as a whole, making IRC, IM, etc
5537 connections more reliable.
5540 - Tor servers with dynamic IP addresses were needing to wait 18
5541 hours before they could start doing reachability testing using
5542 the new IP address and ports. This is because they were using
5543 the internal descriptor to learn what to test, yet they were only
5544 rebuilding the descriptor once they decided they were reachable.
5545 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
5546 to download certain server descriptors, throw them away, and then
5547 fetch them again after 30 minutes. Now mirrors throw away these
5548 server descriptors so clients can't get them.
5549 - We were leaving duplicate connections to other ORs open for a week,
5550 rather than closing them once we detect a duplicate. This only
5551 really affected authdirservers, but it affected them a lot.
5552 - Spread the authdirservers' reachability testing over the entire
5553 testing interval, so we don't try to do 500 TLS's at once every
5557 - If the network is down, and we try to connect to a conn because
5558 we have a circuit in mind, and we timeout (30 seconds) because the
5559 network never answers, we were expiring the circuit, but we weren't
5560 obsoleting the connection or telling the entry_guards functions.
5561 - Some Tor servers process billions of cells per day. These statistics
5562 need to be uint64_t's.
5563 - Check for integer overflows in more places, when adding elements
5564 to smartlists. This could possibly prevent a buffer overflow
5565 on malicious huge inputs. I don't see any, but I haven't looked
5567 - ReachableAddresses kept growing new "reject *:*" lines on every
5569 - When you "setconf log" via the controller, it should remove all
5570 logs. We were automatically adding back in a "log notice stdout".
5571 - Newly bootstrapped Tor networks couldn't establish hidden service
5572 circuits until they had nodes with high uptime. Be more tolerant.
5573 - We were marking servers down when they could not answer every piece
5574 of the directory request we sent them. This was far too harsh.
5575 - Fix the torify (tsocks) config file to not use Tor for localhost
5577 - Directory authorities now go to the proper authority when asking for
5578 a networkstatus, even when they want a compressed one.
5579 - Fix a harmless bug that was causing Tor servers to log
5580 "Got an end because of misc error, but we're not an AP. Closing."
5581 - Authorities were treating their own descriptor changes as cosmetic,
5582 meaning the descriptor available in the network-status and the
5583 descriptor that clients downloaded were different.
5584 - The OS X installer was adding a symlink for tor_resolve but
5585 the binary was called tor-resolve (reported by Thomas Hardly).
5586 - Workaround a problem with some http proxies where they refuse GET
5587 requests that specify "Content-Length: 0" (reported by Adrian).
5588 - Fix wrong log message when you add a "HiddenServiceNodes" config
5589 line without any HiddenServiceDir line (reported by Chris Thomas).
5592 - Write the TorVersion into the state file so we have a prayer of
5593 keeping forward and backward compatibility.
5594 - Revive the FascistFirewall config option rather than eliminating it:
5595 now it's a synonym for ReachableAddresses *:80,*:443.
5596 - Clients choose directory servers from the network status lists,
5597 not from their internal list of router descriptors. Now they can
5598 go to caches directly rather than needing to go to authorities
5600 - Directory authorities ignore router descriptors that have only
5601 cosmetic differences: do this for 0.1.0.x servers now too.
5602 - Add a new flag to network-status indicating whether the server
5603 can answer v2 directory requests too.
5604 - Authdirs now stop whining so loudly about bad descriptors that
5605 they fetch from other dirservers. So when there's a log complaint,
5606 it's for sure from a freshly uploaded descriptor.
5607 - Reduce memory requirements in our structs by changing the order
5609 - There used to be two ways to specify your listening ports in a
5610 server descriptor: on the "router" line and with a separate "ports"
5611 line. Remove support for the "ports" line.
5612 - New config option "AuthDirRejectUnlisted" for auth dirservers as
5613 a panic button: if we get flooded with unusable servers we can
5614 revert to only listing servers in the approved-routers file.
5615 - Auth dir servers can now mark a fingerprint as "!reject" or
5616 "!invalid" in the approved-routers file (as its nickname), to
5617 refuse descriptors outright or include them but marked as invalid.
5618 - Servers store bandwidth history across restarts/crashes.
5619 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
5620 get a better idea of why their circuits failed. Not used yet.
5621 - Directory mirrors now cache up to 16 unrecognized network-status
5622 docs. Now we can add new authdirservers and they'll be cached too.
5623 - When picking a random directory, prefer non-authorities if any
5625 - New controller option "getinfo desc/all-recent" to fetch the
5626 latest server descriptor for every router that Tor knows about.
5629 Changes in version 0.1.0.16 - 2006-01-02
5630 o Crash bugfixes on 0.1.0.x:
5631 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5632 corrupting the heap, losing FDs, or crashing when we need to resize
5633 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5634 - It turns out sparc64 platforms crash on unaligned memory access
5635 too -- so detect and avoid this.
5636 - Handle truncated compressed data correctly (by detecting it and
5638 - Fix possible-but-unlikely free(NULL) in control.c.
5639 - When we were closing connections, there was a rare case that
5640 stomped on memory, triggering seg faults and asserts.
5641 - Avoid potential infinite recursion when building a descriptor. (We
5642 don't know that it ever happened, but better to fix it anyway.)
5643 - We were neglecting to unlink marked circuits from soon-to-close OR
5644 connections, which caused some rare scribbling on freed memory.
5645 - Fix a memory stomping race bug when closing the joining point of two
5646 rendezvous circuits.
5647 - Fix an assert in time parsing found by Steven Murdoch.
5649 o Other bugfixes on 0.1.0.x:
5650 - When we're doing reachability testing, provide more useful log
5651 messages so the operator knows what to expect.
5652 - Do not check whether DirPort is reachable when we are suppressing
5653 advertising it because of hibernation.
5654 - When building with -static or on Solaris, we sometimes needed -ldl.
5655 - When we're deciding whether a stream has enough circuits around
5656 that can handle it, count the freshly dirty ones and not the ones
5657 that are so dirty they won't be able to handle it.
5658 - When we're expiring old circuits, we had a logic error that caused
5659 us to close new rendezvous circuits rather than old ones.
5660 - Give a more helpful log message when you try to change ORPort via
5661 the controller: you should upgrade Tor if you want that to work.
5662 - We were failing to parse Tor versions that start with "Tor ".
5663 - Tolerate faulty streams better: when a stream fails for reason
5664 exitpolicy, stop assuming that the router is lying about his exit
5665 policy. When a stream fails for reason misc, allow it to retry just
5666 as if it was resolvefailed. When a stream has failed three times,
5667 reset its failure count so we can try again and get all three tries.
5670 Changes in version 0.1.1.10-alpha - 2005-12-11
5671 o Correctness bugfixes on 0.1.0.x:
5672 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5673 corrupting the heap, losing FDs, or crashing when we need to resize
5674 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5675 - Stop doing the complex voodoo overkill checking for insecure
5676 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
5677 - When we were closing connections, there was a rare case that
5678 stomped on memory, triggering seg faults and asserts.
5679 - We were neglecting to unlink marked circuits from soon-to-close OR
5680 connections, which caused some rare scribbling on freed memory.
5681 - When we're deciding whether a stream has enough circuits around
5682 that can handle it, count the freshly dirty ones and not the ones
5683 that are so dirty they won't be able to handle it.
5684 - Recover better from TCP connections to Tor servers that are
5685 broken but don't tell you (it happens!); and rotate TLS
5686 connections once a week.
5687 - When we're expiring old circuits, we had a logic error that caused
5688 us to close new rendezvous circuits rather than old ones.
5689 - Fix a scary-looking but apparently harmless bug where circuits
5690 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
5691 servers, and never switch to state CIRCUIT_STATE_OPEN.
5692 - When building with -static or on Solaris, we sometimes needed to
5694 - Give a useful message when people run Tor as the wrong user,
5695 rather than telling them to start chowning random directories.
5696 - We were failing to inform the controller about new .onion streams.
5698 o Security bugfixes on 0.1.0.x:
5699 - Refuse server descriptors if the fingerprint line doesn't match
5700 the included identity key. Tor doesn't care, but other apps (and
5701 humans) might actually be trusting the fingerprint line.
5702 - We used to kill the circuit when we receive a relay command we
5703 don't recognize. Now we just drop it.
5704 - Start obeying our firewall options more rigorously:
5705 . If we can't get to a dirserver directly, try going via Tor.
5706 . Don't ever try to connect (as a client) to a place our
5707 firewall options forbid.
5708 . If we specify a proxy and also firewall options, obey the
5709 firewall options even when we're using the proxy: some proxies
5710 can only proxy to certain destinations.
5711 - Fix a bug found by Lasse Overlier: when we were making internal
5712 circuits (intended to be cannibalized later for rendezvous and
5713 introduction circuits), we were picking them so that they had
5714 useful exit nodes. There was no need for this, and it actually
5715 aids some statistical attacks.
5716 - Start treating internal circuits and exit circuits separately.
5717 It's important to keep them separate because internal circuits
5718 have their last hops picked like middle hops, rather than like
5719 exit hops. So exiting on them will break the user's expectations.
5721 o Bugfixes on 0.1.1.x:
5722 - Take out the mis-feature where we tried to detect IP address
5723 flapping for people with DynDNS, and chose not to upload a new
5724 server descriptor sometimes.
5725 - Try to be compatible with OpenSSL 0.9.6 again.
5726 - Log fix: when the controller is logging about .onion addresses,
5727 sometimes it didn't include the ".onion" part of the address.
5728 - Don't try to modify options->DirServers internally -- if the
5729 user didn't specify any, just add the default ones directly to
5730 the trusted dirserver list. This fixes a bug where people running
5731 controllers would use SETCONF on some totally unrelated config
5732 option, and Tor would start yelling at them about changing their
5734 - Let the controller's redirectstream command specify a port, in
5735 case the controller wants to change that too.
5736 - When we requested a pile of server descriptors, we sometimes
5737 accidentally launched a duplicate request for the first one.
5738 - Bugfix for trackhostexits: write down the fingerprint of the
5739 chosen exit, not its nickname, because the chosen exit might not
5741 - When parsing foo.exit, if foo is unknown, and we are leaving
5742 circuits unattached, set the chosen_exit field and leave the
5743 address empty. This matters because controllers got confused
5745 - Directory authorities no longer try to download server
5746 descriptors that they know they will reject.
5748 o Features and updates:
5749 - Replace balanced trees with hash tables: this should make stuff
5750 significantly faster.
5751 - Resume using the AES counter-mode implementation that we ship,
5752 rather than OpenSSL's. Ours is significantly faster.
5753 - Many other CPU and memory improvements.
5754 - Add a new config option FastFirstHopPK (on by default) so clients
5755 do a trivial crypto handshake for their first hop, since TLS has
5756 already taken care of confidentiality and authentication.
5757 - Add a new config option TestSocks so people can see if their
5758 applications are using socks4, socks4a, socks5-with-ip, or
5759 socks5-with-hostname. This way they don't have to keep mucking
5760 with tcpdump and wondering if something got cached somewhere.
5761 - Warn when listening on a public address for socks. I suspect a
5762 lot of people are setting themselves up as open socks proxies,
5763 and they have no idea that jerks on the Internet are using them,
5764 since they simply proxy the traffic into the Tor network.
5765 - Add "private:*" as an alias in configuration for policies. Now
5766 you can simplify your exit policy rather than needing to list
5767 every single internal or nonroutable network space.
5768 - Add a new controller event type that allows controllers to get
5769 all server descriptors that were uploaded to a router in its role
5770 as authoritative dirserver.
5771 - Start shipping socks-extensions.txt, tor-doc-unix.html,
5772 tor-doc-server.html, and stylesheet.css in the tarball.
5773 - Stop shipping tor-doc.html in the tarball.
5776 Changes in version 0.1.1.9-alpha - 2005-11-15
5777 o Usability improvements:
5778 - Start calling it FooListenAddress rather than FooBindAddress,
5779 since few of our users know what it means to bind an address
5781 - Reduce clutter in server logs. We're going to try to make
5782 them actually usable now. New config option ProtocolWarnings that
5783 lets you hear about how _other Tors_ are breaking the protocol. Off
5785 - Divide log messages into logging domains. Once we put some sort
5786 of interface on this, it will let people looking at more verbose
5787 log levels specify the topics they want to hear more about.
5788 - Make directory servers return better http 404 error messages
5789 instead of a generic "Servers unavailable".
5790 - Check for even more Windows version flags when writing the platform
5791 string in server descriptors, and note any we don't recognize.
5792 - Clean up more of the OpenSSL memory when exiting, so we can detect
5793 memory leaks better.
5794 - Make directory authorities be non-versioning, non-naming by
5795 default. Now we can add new directory servers without requiring
5796 their operators to pay close attention.
5797 - When logging via syslog, include the pid whenever we provide
5798 a log entry. Suggested by Todd Fries.
5800 o Performance improvements:
5801 - Directory servers now silently throw away new descriptors that
5802 haven't changed much if the timestamps are similar. We do this to
5803 tolerate older Tor servers that upload a new descriptor every 15
5804 minutes. (It seemed like a good idea at the time.)
5805 - Inline bottleneck smartlist functions; use fast versions by default.
5806 - Add a "Map from digest to void*" abstraction digestmap_t so we
5807 can do less hex encoding/decoding. Use it in router_get_by_digest()
5808 to resolve a performance bottleneck.
5809 - Allow tor_gzip_uncompress to extract as much as possible from
5810 truncated compressed data. Try to extract as many
5811 descriptors as possible from truncated http responses (when
5812 DIR_PURPOSE_FETCH_ROUTERDESC).
5813 - Make circ->onionskin a pointer, not a static array. moria2 was using
5814 125000 circuit_t's after it had been up for a few weeks, which
5815 translates to 20+ megs of wasted space.
5816 - The private half of our EDH handshake keys are now chosen out
5817 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
5819 o Security improvements:
5820 - Start making directory caches retain old routerinfos, so soon
5821 clients can start asking by digest of descriptor rather than by
5822 fingerprint of server.
5823 - Add half our entropy from RAND_poll in OpenSSL. This knows how
5824 to use egd (if present), openbsd weirdness (if present), vms/os2
5825 weirdness (if we ever port there), and more in the future.
5827 o Bugfixes on 0.1.0.x:
5828 - Do round-robin writes of at most 16 kB per write. This might be
5829 more fair on loaded Tor servers, and it might resolve our Windows
5830 crash bug. It might also slow things down.
5831 - Our TLS handshakes were generating a single public/private
5832 keypair for the TLS context, rather than making a new one for
5833 each new connections. Oops. (But we were still rotating them
5834 periodically, so it's not so bad.)
5835 - When we were cannibalizing a circuit with a particular exit
5836 node in mind, we weren't checking to see if that exit node was
5837 already present earlier in the circuit. Oops.
5838 - When a Tor server's IP changes (e.g. from a dyndns address),
5839 upload a new descriptor so clients will learn too.
5840 - Really busy servers were keeping enough circuits open on stable
5841 connections that they were wrapping around the circuit_id
5842 space. (It's only two bytes.) This exposed a bug where we would
5843 feel free to reuse a circuit_id even if it still exists but has
5844 been marked for close. Try to fix this bug. Some bug remains.
5845 - If we would close a stream early (e.g. it asks for a .exit that
5846 we know would refuse it) but the LeaveStreamsUnattached config
5847 option is set by the controller, then don't close it.
5849 o Bugfixes on 0.1.1.8-alpha:
5850 - Fix a big pile of memory leaks, some of them serious.
5851 - Do not try to download a routerdesc if we would immediately reject
5853 - Resume inserting a newline between all router descriptors when
5854 generating (old style) signed directories, since our spec says
5856 - When providing content-type application/octet-stream for
5857 server descriptors using .z, we were leaving out the
5858 content-encoding header. Oops. (Everything tolerated this just
5859 fine, but that doesn't mean we need to be part of the problem.)
5860 - Fix a potential seg fault in getconf and getinfo using version 1
5861 of the controller protocol.
5862 - Avoid crash: do not check whether DirPort is reachable when we
5863 are suppressing it because of hibernation.
5864 - Make --hash-password not crash on exit.
5867 Changes in version 0.1.1.8-alpha - 2005-10-07
5868 o New features (major):
5869 - Clients don't download or use the directory anymore. Now they
5870 download and use network-statuses from the trusted dirservers,
5871 and fetch individual server descriptors as needed from mirrors.
5872 See dir-spec.txt for all the gory details.
5873 - Be more conservative about whether to advertise our DirPort.
5874 The main change is to not advertise if we're running at capacity
5875 and either a) we could hibernate or b) our capacity is low and
5876 we're using a default DirPort.
5877 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
5879 o New features (minor):
5880 - Try to be smart about when to retry network-status and
5881 server-descriptor fetches. Still needs some tuning.
5882 - Stop parsing, storing, or using running-routers output (but
5883 mirrors still cache and serve it).
5884 - Consider a threshold of versioning dirservers (dirservers who have
5885 an opinion about which Tor versions are still recommended) before
5886 deciding whether to warn the user that he's obsolete.
5887 - Dirservers can now reject/invalidate by key and IP, with the
5888 config options "AuthDirInvalid" and "AuthDirReject". This is
5889 useful since currently we automatically list servers as running
5890 and usable even if we know they're jerks.
5891 - Provide dire warnings to any users who set DirServer; move it out
5892 of torrc.sample and into torrc.complete.
5893 - Add MyFamily to torrc.sample in the server section.
5894 - Add nicknames to the DirServer line, so we can refer to them
5895 without requiring all our users to memorize their IP addresses.
5896 - When we get an EOF or a timeout on a directory connection, note
5897 how many bytes of serverdesc we are dropping. This will help
5898 us determine whether it is smart to parse incomplete serverdesc
5900 - Add a new function to "change pseudonyms" -- that is, to stop
5901 using any currently-dirty circuits for new streams, so we don't
5902 link new actions to old actions. Currently it's only called on
5903 HUP (or SIGNAL RELOAD).
5904 - On sighup, if UseHelperNodes changed to 1, use new circuits.
5905 - Start using RAND_bytes rather than RAND_pseudo_bytes from
5906 OpenSSL. Also, reseed our entropy every hour, not just at
5907 startup. And entropy in 512-bit chunks, not 160-bit chunks.
5909 o Fixes on 0.1.1.7-alpha:
5910 - Nobody ever implemented EVENT_ADDRMAP for control protocol
5911 version 0, so don't let version 0 controllers ask for it.
5912 - If you requested something with too many newlines via the
5913 v1 controller protocol, you could crash tor.
5914 - Fix a number of memory leaks, including some pretty serious ones.
5915 - Re-enable DirPort testing again, so Tor servers will be willing
5916 to advertise their DirPort if it's reachable.
5917 - On TLS handshake, only check the other router's nickname against
5918 its expected nickname if is_named is set.
5920 o Fixes forward-ported from 0.1.0.15:
5921 - Don't crash when we don't have any spare file descriptors and we
5922 try to spawn a dns or cpu worker.
5923 - Make the numbers in read-history and write-history into uint64s,
5924 so they don't overflow and publish negatives in the descriptor.
5927 - For the OS X package's modified privoxy config file, comment
5928 out the "logfile" line so we don't log everything passed
5930 - We were whining about using socks4 or socks5-with-local-lookup
5931 even when it's an IP in the "virtual" range we designed exactly
5933 - We were leaking some memory every time the client changes IPs.
5934 - Never call free() on tor_malloc()d memory. This will help us
5935 use dmalloc to detect memory leaks.
5936 - Check for named servers when looking them up by nickname;
5937 warn when we'recalling a non-named server by its nickname;
5938 don't warn twice about the same name.
5939 - Try to list MyFamily elements by key, not by nickname, and warn
5940 if we've not heard of the server.
5941 - Make windows platform detection (uname equivalent) smarter.
5942 - It turns out sparc64 doesn't like unaligned access either.
5945 Changes in version 0.1.0.15 - 2005-09-23
5946 o Bugfixes on 0.1.0.x:
5947 - Reject ports 465 and 587 (spam targets) in default exit policy.
5948 - Don't crash when we don't have any spare file descriptors and we
5949 try to spawn a dns or cpu worker.
5950 - Get rid of IgnoreVersion undocumented config option, and make us
5951 only warn, never exit, when we're running an obsolete version.
5952 - Don't try to print a null string when your server finds itself to
5953 be unreachable and the Address config option is empty.
5954 - Make the numbers in read-history and write-history into uint64s,
5955 so they don't overflow and publish negatives in the descriptor.
5956 - Fix a minor memory leak in smartlist_string_remove().
5957 - We were only allowing ourselves to upload a server descriptor at
5958 most every 20 minutes, even if it changed earlier than that.
5959 - Clean up log entries that pointed to old URLs.
5962 Changes in version 0.1.1.7-alpha - 2005-09-14
5963 o Fixes on 0.1.1.6-alpha:
5964 - Exit servers were crashing when people asked them to make a
5965 connection to an address not in their exit policy.
5966 - Looking up a non-existent stream for a v1 control connection would
5968 - Fix a seg fault if we ask a dirserver for a descriptor by
5969 fingerprint but he doesn't know about him.
5970 - SETCONF was appending items to linelists, not clearing them.
5971 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
5972 out and refuse the setconf if it would fail.
5973 - Downgrade the dirserver log messages when whining about
5977 - Add Peter Palfrader's check-tor script to tor/contrib/
5978 It lets you easily check whether a given server (referenced by
5979 nickname) is reachable by you.
5980 - Numerous changes to move towards client-side v2 directories. Not
5984 - If the user gave tor an odd number of command-line arguments,
5985 we were silently ignoring the last one. Now we complain and fail.
5986 [This wins the oldest-bug prize -- this bug has been present since
5987 November 2002, as released in Tor 0.0.0.]
5988 - Do not use unaligned memory access on alpha, mips, or mipsel.
5989 It *works*, but is very slow, so we treat them as if it doesn't.
5990 - Retry directory requests if we fail to get an answer we like
5991 from a given dirserver (we were retrying before, but only if
5992 we fail to connect).
5993 - When writing the RecommendedVersions line, sort them first.
5994 - When the client asked for a rendezvous port that the hidden
5995 service didn't want to provide, we were sending an IP address
5996 back along with the end cell. Fortunately, it was zero. But stop
5998 - Correct "your server is reachable" log entries to indicate that
5999 it was self-testing that told us so.
6002 Changes in version 0.1.1.6-alpha - 2005-09-09
6003 o Fixes on 0.1.1.5-alpha:
6004 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
6005 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
6006 - Fix bug with tor_memmem finding a match at the end of the string.
6007 - Make unit tests run without segfaulting.
6008 - Resolve some solaris x86 compile warnings.
6009 - Handle duplicate lines in approved-routers files without warning.
6010 - Fix bug where as soon as a server refused any requests due to his
6011 exit policy (e.g. when we ask for localhost and he tells us that's
6012 127.0.0.1 and he won't do it), we decided he wasn't obeying his
6013 exit policy using him for any exits.
6014 - Only do openssl hardware accelerator stuff if openssl version is
6017 o New controller features/fixes:
6018 - Add a "RESETCONF" command so you can set config options like
6019 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
6020 a config option in the torrc with no value, then it clears it
6021 entirely (rather than setting it to its default).
6022 - Add a "GETINFO config-file" to tell us where torrc is.
6023 - Avoid sending blank lines when GETINFO replies should be empty.
6024 - Add a QUIT command for the controller (for using it manually).
6025 - Fix a bug in SAVECONF that was adding default dirservers and
6026 other redundant entries to the torrc file.
6028 o Start on the new directory design:
6029 - Generate, publish, cache, serve new network-status format.
6030 - Publish individual descriptors (by fingerprint, by "all", and by
6032 - Publish client and server recommended versions separately.
6033 - Allow tor_gzip_uncompress() to handle multiple concatenated
6034 compressed strings. Serve compressed groups of router
6035 descriptors. The compression logic here could be more
6037 - Distinguish v1 authorities (all currently trusted directories)
6038 from v2 authorities (all trusted directories).
6039 - Change DirServers config line to note which dirs are v1 authorities.
6040 - Add configuration option "V1AuthoritativeDirectory 1" which
6041 moria1, moria2, and tor26 should set.
6042 - Remove option when getting directory cache to see whether they
6043 support running-routers; they all do now. Replace it with one
6044 to see whether caches support v2 stuff.
6047 - Dirservers now do their own external reachability testing of each
6048 Tor server, and only list them as running if they've been found to
6049 be reachable. We also send back warnings to the server's logs if
6050 it uploads a descriptor that we already believe is unreachable.
6051 - Implement exit enclaves: if we know an IP address for the
6052 destination, and there's a running Tor server at that address
6053 which allows exit to the destination, then extend the circuit to
6054 that exit first. This provides end-to-end encryption and end-to-end
6055 authentication. Also, if the user wants a .exit address or enclave,
6056 use 4 hops rather than 3, and cannibalize a general circ for it
6058 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
6059 controller. Also, rotate dns and cpu workers if the controller
6060 changes options that will affect them; and initialize the dns
6061 worker cache tree whether or not we start out as a server.
6062 - Only upload a new server descriptor when options change, 18
6063 hours have passed, uptime is reset, or bandwidth changes a lot.
6064 - Check [X-]Forwarded-For headers in HTTP requests when generating
6065 log messages. This lets people run dirservers (and caches) behind
6066 Apache but still know which IP addresses are causing warnings.
6068 o Config option changes:
6069 - Replace (Fascist)Firewall* config options with a new
6070 ReachableAddresses option that understands address policies.
6071 For example, "ReachableAddresses *:80,*:443"
6072 - Get rid of IgnoreVersion undocumented config option, and make us
6073 only warn, never exit, when we're running an obsolete version.
6074 - Make MonthlyAccountingStart config option truly obsolete now.
6077 - Reject ports 465 and 587 in the default exit policy, since
6078 people have started using them for spam too.
6079 - It turns out we couldn't bootstrap a network since we added
6080 reachability detection in 0.1.0.1-rc. Good thing the Tor network
6081 has never gone down. Add an AssumeReachable config option to let
6082 servers and dirservers bootstrap. When we're trying to build a
6083 high-uptime or high-bandwidth circuit but there aren't enough
6084 suitable servers, try being less picky rather than simply failing.
6085 - Our logic to decide if the OR we connected to was the right guy
6086 was brittle and maybe open to a mitm for unverified routers.
6087 - We weren't cannibalizing circuits correctly for
6088 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
6089 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
6090 build those from scratch. This should make hidden services faster.
6091 - Predict required circuits better, with an eye toward making hidden
6092 services faster on the service end.
6093 - Retry streams if the exit node sends back a 'misc' failure. This
6094 should result in fewer random failures. Also, after failing
6095 from resolve failed or misc, reset the num failures, so we give
6096 it a fair shake next time we try.
6097 - Clean up the rendezvous warn log msgs, and downgrade some to info.
6098 - Reduce severity on logs about dns worker spawning and culling.
6099 - When we're shutting down and we do something like try to post a
6100 server descriptor or rendezvous descriptor, don't complain that
6101 we seem to be unreachable. Of course we are, we're shutting down.
6102 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
6103 We don't use them yet, but maybe one day our DNS resolver will be
6104 able to discover them.
6105 - Make ContactInfo mandatory for authoritative directory servers.
6106 - Require server descriptors to list IPv4 addresses -- hostnames
6107 are no longer allowed. This also fixes some potential security
6108 problems with people providing hostnames as their address and then
6109 preferentially resolving them to partition users.
6110 - Change log line for unreachability to explicitly suggest /etc/hosts
6111 as the culprit. Also make it clearer what IP address and ports we're
6112 testing for reachability.
6113 - Put quotes around user-supplied strings when logging so users are
6114 more likely to realize if they add bad characters (like quotes)
6116 - Let auth dir servers start without specifying an Address config
6118 - Make unit tests (and other invocations that aren't the real Tor)
6119 run without launching listeners, creating subdirectories, and so on.
6122 Changes in version 0.1.1.5-alpha - 2005-08-08
6123 o Bugfixes included in 0.1.0.14.
6125 o Bugfixes on 0.1.0.x:
6126 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
6127 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
6128 it would silently using ignore the 6668.
6131 Changes in version 0.1.0.14 - 2005-08-08
6132 o Bugfixes on 0.1.0.x:
6133 - Fix the other half of the bug with crypto handshakes
6135 - Fix an assert trigger if you send a 'signal term' via the
6136 controller when it's listening for 'event info' messages.
6139 Changes in version 0.1.1.4-alpha - 2005-08-04
6140 o Bugfixes included in 0.1.0.13.
6143 - Improve tor_gettimeofday() granularity on windows.
6144 - Make clients regenerate their keys when their IP address changes.
6145 - Implement some more GETINFO goodness: expose helper nodes, config
6146 options, getinfo keys.
6149 Changes in version 0.1.0.13 - 2005-08-04
6150 o Bugfixes on 0.1.0.x:
6151 - Fix a critical bug in the security of our crypto handshakes.
6152 - Fix a size_t underflow in smartlist_join_strings2() that made
6153 it do bad things when you hand it an empty smartlist.
6154 - Fix Windows installer to ship Tor license (thanks to Aphex for
6155 pointing out this oversight) and put a link to the doc directory
6157 - Explicitly set no-unaligned-access for sparc: it turns out the
6158 new gcc's let you compile broken code, but that doesn't make it
6162 Changes in version 0.1.1.3-alpha - 2005-07-23
6163 o Bugfixes on 0.1.1.2-alpha:
6164 - Fix a bug in handling the controller's "post descriptor"
6166 - Fix several bugs in handling the controller's "extend circuit"
6168 - Fix a bug in handling the controller's "stream status" event.
6169 - Fix an assert failure if we have a controller listening for
6170 circuit events and we go offline.
6171 - Re-allow hidden service descriptors to publish 0 intro points.
6172 - Fix a crash when generating your hidden service descriptor if
6173 you don't have enough intro points already.
6175 o New features on 0.1.1.2-alpha:
6176 - New controller function "getinfo accounting", to ask how
6177 many bytes we've used in this time period.
6178 - Experimental support for helper nodes: a lot of the risk from
6179 a small static adversary comes because users pick new random
6180 nodes every time they rebuild a circuit. Now users will try to
6181 stick to the same small set of entry nodes if they can. Not
6182 enabled by default yet.
6184 o Bugfixes on 0.1.0.12:
6185 - If you're an auth dir server, always publish your dirport,
6186 even if you haven't yet found yourself to be reachable.
6187 - Fix a size_t underflow in smartlist_join_strings2() that made
6188 it do bad things when you hand it an empty smartlist.
6191 Changes in version 0.1.0.12 - 2005-07-18
6192 o New directory servers:
6193 - tor26 has changed IP address.
6195 o Bugfixes on 0.1.0.x:
6196 - Fix a possible double-free in tor_gzip_uncompress().
6197 - When --disable-threads is set, do not search for or link against
6199 - Don't trigger an assert if an authoritative directory server
6200 claims its dirport is 0.
6201 - Fix bug with removing Tor as an NT service: some people were
6202 getting "The service did not return an error." Thanks to Matt
6206 Changes in version 0.1.1.2-alpha - 2005-07-15
6207 o New directory servers:
6208 - tor26 has changed IP address.
6210 o Bugfixes on 0.1.0.x, crashes/leaks:
6211 - Port the servers-not-obeying-their-exit-policies fix from
6213 - Fix an fd leak in start_daemon().
6214 - On Windows, you can't always reopen a port right after you've
6215 closed it. So change retry_listeners() to only close and re-open
6216 ports that have changed.
6217 - Fix a possible double-free in tor_gzip_uncompress().
6219 o Bugfixes on 0.1.0.x, usability:
6220 - When tor_socketpair() fails in Windows, give a reasonable
6221 Windows-style errno back.
6222 - Let people type "tor --install" as well as "tor -install" when
6224 want to make it an NT service.
6225 - NT service patch from Matt Edman to improve error messages.
6226 - When the controller asks for a config option with an abbreviated
6227 name, give the full name in our response.
6228 - Correct the man page entry on TrackHostExitsExpire.
6229 - Looks like we were never delivering deflated (i.e. compressed)
6230 running-routers lists, even when asked. Oops.
6231 - When --disable-threads is set, do not search for or link against
6234 o Bugfixes on 0.1.1.x:
6235 - Fix a seg fault with autodetecting which controller version is
6239 - New hidden service descriptor format: put a version in it, and
6240 let people specify introduction/rendezvous points that aren't
6241 in "the directory" (which is subjective anyway).
6242 - Allow the DEBUG controller event to work again. Mark certain log
6243 entries as "don't tell this to controllers", so we avoid cycles.
6246 Changes in version 0.1.0.11 - 2005-06-30
6247 o Bugfixes on 0.1.0.x:
6248 - Fix major security bug: servers were disregarding their
6249 exit policies if clients behaved unexpectedly.
6250 - Make OS X init script check for missing argument, so we don't
6251 confuse users who invoke it incorrectly.
6252 - Fix a seg fault in "tor --hash-password foo".
6253 - The MAPADDRESS control command was broken.
6256 Changes in version 0.1.1.1-alpha - 2005-06-29
6258 - Make OS X init script check for missing argument, so we don't
6259 confuse users who invoke it incorrectly.
6260 - Fix a seg fault in "tor --hash-password foo".
6261 - Fix a possible way to DoS dirservers.
6262 - When we complain that your exit policy implicitly allows local or
6263 private address spaces, name them explicitly so operators can
6265 - Make the log message less scary when all the dirservers are
6266 temporarily unreachable.
6267 - We were printing the number of idle dns workers incorrectly when
6271 - Revised controller protocol (version 1) that uses ascii rather
6272 than binary. Add supporting libraries in python and java so you
6273 can use the controller from your applications without caring how
6275 - Spiffy new support for crypto hardware accelerators. Can somebody
6279 Changes in version 0.0.9.10 - 2005-06-16
6280 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
6281 - Refuse relay cells that claim to have a length larger than the
6282 maximum allowed. This prevents a potential attack that could read
6283 arbitrary memory (e.g. keys) from an exit server's process
6287 Changes in version 0.1.0.10 - 2005-06-14
6288 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
6289 libevent before 1.1a.
6292 Changes in version 0.1.0.9-rc - 2005-06-09
6294 - Reset buf->highwater every time buf_shrink() is called, not just on
6295 a successful shrink. This was causing significant memory bloat.
6296 - Fix buffer overflow when checking hashed passwords.
6297 - Security fix: if seeding the RNG on Win32 fails, quit.
6298 - Allow seeding the RNG on Win32 even when you're not running as
6300 - Disable threading on Solaris too. Something is wonky with it,
6301 cpuworkers, and reentrant libs.
6302 - Reenable the part of the code that tries to flush as soon as an
6303 OR outbuf has a full TLS record available. Perhaps this will make
6304 OR outbufs not grow as huge except in rare cases, thus saving lots
6305 of CPU time plus memory.
6306 - Reject malformed .onion addresses rather then passing them on as
6307 normal web requests.
6308 - Adapt patch from Adam Langley: fix possible memory leak in
6309 tor_lookup_hostname().
6310 - Initialize libevent later in the startup process, so the logs are
6311 already established by the time we start logging libevent warns.
6312 - Use correct errno on win32 if libevent fails.
6313 - Check and warn about known-bad/slow libevent versions.
6314 - Pay more attention to the ClientOnly config option.
6315 - Have torctl.in/tor.sh.in check for location of su binary (needed
6317 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
6318 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
6319 HttpProxyAuthenticator
6320 - Stop warning about sigpipes in the logs. We're going to
6321 pretend that getting these occassionally is normal and fine.
6322 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
6324 installer screens; and don't put stuff into StartupItems unless
6325 the user asks you to.
6326 - Require servers that use the default dirservers to have public IP
6327 addresses. We have too many servers that are configured with private
6328 IPs and their admins never notice the log entries complaining that
6329 their descriptors are being rejected.
6330 - Add OSX uninstall instructions. An actual uninstall script will
6334 Changes in version 0.1.0.8-rc - 2005-05-23
6336 - It turns out that kqueue on OS X 10.3.9 was causing kernel
6337 panics. Disable kqueue on all OS X Tors.
6338 - Fix RPM: remove duplicate line accidentally added to the rpm
6340 - Disable threads on openbsd too, since its gethostaddr is not
6342 - Tolerate libevent 0.8 since it still works, even though it's
6344 - Enable building on Red Hat 9.0 again.
6345 - Allow the middle hop of the testing circuit to be running any
6346 version, now that most of them have the bugfix to let them connect
6347 to unknown servers. This will allow reachability testing to work
6348 even when 0.0.9.7-0.0.9.9 become obsolete.
6349 - Handle relay cells with rh.length too large. This prevents
6350 a potential attack that could read arbitrary memory (maybe even
6351 keys) from the exit server's process.
6352 - We screwed up the dirport reachability testing when we don't yet
6353 have a cached version of the directory. Hopefully now fixed.
6354 - Clean up router_load_single_router() (used by the controller),
6355 so it doesn't seg fault on error.
6356 - Fix a minor memory leak when somebody establishes an introduction
6357 point at your Tor server.
6358 - If a socks connection ends because read fails, don't warn that
6359 you're not sending a socks reply back.
6362 - Add HttpProxyAuthenticator config option too, that works like
6363 the HttpsProxyAuthenticator config option.
6364 - Encode hashed controller passwords in hex instead of base64,
6365 to make it easier to write controllers.
6368 Changes in version 0.1.0.7-rc - 2005-05-17
6370 - Fix a bug in the OS X package installer that prevented it from
6371 installing on Tiger.
6372 - Fix a script bug in the OS X package installer that made it
6373 complain during installation.
6374 - Find libevent even if it's hiding in /usr/local/ and your
6375 CFLAGS and LDFLAGS don't tell you to look there.
6376 - Be able to link with libevent as a shared library (the default
6377 after 1.0d), even if it's hiding in /usr/local/lib and even
6378 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
6379 assuming you're running gcc. Otherwise fail and give a useful
6381 - Fix a bug in the RPM packager: set home directory for _tor to
6382 something more reasonable when first installing.
6383 - Free a minor amount of memory that is still reachable on exit.
6386 Changes in version 0.1.0.6-rc - 2005-05-14
6388 - Implement --disable-threads configure option. Disable threads on
6389 netbsd by default, because it appears to have no reentrant resolver
6391 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
6392 release (1.1) detects and disables kqueue if it's broken.
6393 - Append default exit policy before checking for implicit internal
6394 addresses. Now we don't log a bunch of complaints on startup
6395 when using the default exit policy.
6396 - Some people were putting "Address " in their torrc, and they had
6397 a buggy resolver that resolved " " to 0.0.0.0. Oops.
6398 - If DataDir is ~/.tor, and that expands to /.tor, then default to
6399 LOCALSTATEDIR/tor instead.
6400 - Fix fragmented-message bug in TorControl.py.
6401 - Resolve a minor bug which would prevent unreachable dirports
6402 from getting suppressed in the published descriptor.
6403 - When the controller gave us a new descriptor, we weren't resolving
6404 it immediately, so Tor would think its address was 0.0.0.0 until
6405 we fetched a new directory.
6406 - Fix an uppercase/lowercase case error in suppressing a bogus
6407 libevent warning on some Linuxes.
6410 - Begin scrubbing sensitive strings from logs by default. Turn off
6411 the config option SafeLogging if you need to do debugging.
6412 - Switch to a new buffer management algorithm, which tries to avoid
6413 reallocing and copying quite as much. In first tests it looks like
6414 it uses *more* memory on average, but less cpu.
6415 - First cut at support for "create-fast" cells. Clients can use
6416 these when extending to their first hop, since the TLS already
6417 provides forward secrecy and authentication. Not enabled on
6419 - When dirservers refuse a router descriptor, we now log its
6420 contactinfo, platform, and the poster's IP address.
6421 - Call tor_free_all instead of connections_free_all after forking, to
6422 save memory on systems that need to fork.
6423 - Whine at you if you're a server and you don't set your contactinfo.
6424 - Implement --verify-config command-line option to check if your torrc
6425 is valid without actually launching Tor.
6426 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
6427 rather than just rejecting it.
6430 Changes in version 0.1.0.5-rc - 2005-04-27
6432 - Stop trying to print a null pointer if an OR conn fails because
6433 we didn't like its cert.
6435 - Switch our internal buffers implementation to use a ring buffer,
6436 to hopefully improve performance for fast servers a lot.
6437 - Add HttpsProxyAuthenticator support (basic auth only), based
6438 on patch from Adam Langley.
6439 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
6440 the fast servers that have been joining lately.
6441 - Give hidden service accesses extra time on the first attempt,
6442 since 60 seconds is often only barely enough. This might improve
6444 - Improve performance for dirservers: stop re-parsing the whole
6445 directory every time you regenerate it.
6446 - Add more debugging info to help us find the weird dns freebsd
6447 pthreads bug; cleaner debug messages to help track future issues.
6450 Changes in version 0.0.9.9 - 2005-04-23
6451 o Bugfixes on 0.0.9.x:
6452 - If unofficial Tor clients connect and send weird TLS certs, our
6453 Tor server triggers an assert. This release contains a minimal
6454 backport from the broader fix that we put into 0.1.0.4-rc.
6457 Changes in version 0.1.0.4-rc - 2005-04-23
6459 - If unofficial Tor clients connect and send weird TLS certs, our
6460 Tor server triggers an assert. Stop asserting, and start handling
6461 TLS errors better in other situations too.
6462 - When the controller asks us to tell it about all the debug-level
6463 logs, it turns out we were generating debug-level logs while
6464 telling it about them, which turns into a bad loop. Now keep
6465 track of whether you're sending a debug log to the controller,
6466 and don't log when you are.
6467 - Fix the "postdescriptor" feature of the controller interface: on
6468 non-complete success, only say "done" once.
6470 - Clients are now willing to load balance over up to 2mB, not 1mB,
6471 of advertised bandwidth capacity.
6472 - Add a NoPublish config option, so you can be a server (e.g. for
6473 testing running Tor servers in other Tor networks) without
6474 publishing your descriptor to the primary dirservers.
6477 Changes in version 0.1.0.3-rc - 2005-04-08
6478 o Improvements on 0.1.0.2-rc:
6479 - Client now retries when streams end early for 'hibernating' or
6480 'resource limit' reasons, rather than failing them.
6481 - More automated handling for dirserver operators:
6482 - Automatically approve nodes running 0.1.0.2-rc or later,
6483 now that the the reachability detection stuff is working.
6484 - Now we allow two unverified servers with the same nickname
6485 but different keys. But if a nickname is verified, only that
6486 nickname+key are allowed.
6487 - If you're an authdirserver connecting to an address:port,
6488 and it's not the OR you were expecting, forget about that
6489 descriptor. If he *was* the one you were expecting, then forget
6490 about all other descriptors for that address:port.
6491 - Allow servers to publish descriptors from 12 hours in the future.
6492 Corollary: only whine about clock skew from the dirserver if
6493 he's a trusted dirserver (since now even verified servers could
6494 have quite wrong clocks).
6495 - Adjust maximum skew and age for rendezvous descriptors: let skew
6496 be 48 hours rather than 90 minutes.
6497 - Efficiency improvements:
6498 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
6499 it much faster to look up a circuit for each relay cell.
6500 - Remove most calls to assert_all_pending_dns_resolves_ok(),
6501 since they're eating our cpu on exit nodes.
6502 - Stop wasting time doing a case insensitive comparison for every
6503 dns name every time we do any lookup. Canonicalize the names to
6504 lowercase and be done with it.
6505 - Start sending 'truncated' cells back rather than destroy cells,
6506 if the circuit closes in front of you. This means we won't have
6507 to abandon partially built circuits.
6508 - Only warn once per nickname from add_nickname_list_to_smartlist
6509 per failure, so an entrynode or exitnode choice that's down won't
6511 - Put a note in the torrc about abuse potential with the default
6513 - Revise control spec and implementation to allow all log messages to
6514 be sent to controller with their severities intact (suggested by
6515 Matt Edman). Update TorControl to handle new log event types.
6516 - Provide better explanation messages when controller's POSTDESCRIPTOR
6518 - Stop putting nodename in the Platform string in server descriptors.
6519 It doesn't actually help, and it is confusing/upsetting some people.
6521 o Bugfixes on 0.1.0.2-rc:
6522 - We were printing the host mask wrong in exit policies in server
6523 descriptors. This isn't a critical bug though, since we were still
6524 obeying the exit policy internally.
6525 - Fix Tor when compiled with libevent but without pthreads: move
6526 connection_unregister() from _connection_free() to
6528 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
6529 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
6530 when we look through the connection array, we'll find any of the
6531 cpu/dnsworkers. This is no good.
6533 o Bugfixes on 0.0.9.8:
6534 - Fix possible bug on threading platforms (e.g. win32) which was
6535 leaking a file descriptor whenever a cpuworker or dnsworker died.
6536 - When using preferred entry or exit nodes, ignore whether the
6537 circuit wants uptime or capacity. They asked for the nodes, they
6539 - chdir() to your datadirectory at the *end* of the daemonize process,
6540 not the beginning. This was a problem because the first time you
6541 run tor, if your datadir isn't there, and you have runasdaemon set
6542 to 1, it will try to chdir to it before it tries to create it. Oops.
6543 - Handle changed router status correctly when dirserver reloads
6544 fingerprint file. We used to be dropping all unverified descriptors
6545 right then. The bug was hidden because we would immediately
6546 fetch a directory from another dirserver, which would include the
6547 descriptors we just dropped.
6548 - When we're connecting to an OR and he's got a different nickname/key
6549 than we were expecting, only complain loudly if we're an OP or a
6550 dirserver. Complaining loudly to the OR admins just confuses them.
6551 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
6552 artificially capped at 500kB.
6555 Changes in version 0.0.9.8 - 2005-04-07
6556 o Bugfixes on 0.0.9.x:
6557 - We have a bug that I haven't found yet. Sometimes, very rarely,
6558 cpuworkers get stuck in the 'busy' state, even though the cpuworker
6559 thinks of itself as idle. This meant that no new circuits ever got
6560 established. Here's a workaround to kill any cpuworker that's been
6561 busy for more than 100 seconds.
6564 Changes in version 0.1.0.2-rc - 2005-04-01
6565 o Bugfixes on 0.1.0.1-rc:
6566 - Fixes on reachability detection:
6567 - Don't check for reachability while hibernating.
6568 - If ORPort is reachable but DirPort isn't, still publish the
6569 descriptor, but zero out DirPort until it's found reachable.
6570 - When building testing circs for ORPort testing, use only
6571 high-bandwidth nodes, so fewer circuits fail.
6572 - Complain about unreachable ORPort separately from unreachable
6573 DirPort, so the user knows what's going on.
6574 - Make sure we only conclude ORPort reachability if we didn't
6575 initiate the conn. Otherwise we could falsely conclude that
6576 we're reachable just because we connected to the guy earlier
6577 and he used that same pipe to extend to us.
6578 - Authdirservers shouldn't do ORPort reachability detection,
6579 since they're in clique mode, so it will be rare to find a
6580 server not already connected to them.
6581 - When building testing circuits, always pick middle hops running
6582 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
6583 bug. (This is a kludge; it will go away when 0.0.9.x becomes
6585 - When we decide we're reachable, actually publish our descriptor
6587 - Fix bug in redirectstream in the controller.
6588 - Fix the state descriptor strings so logs don't claim edge streams
6589 are in a different state than they actually are.
6590 - Use recent libevent features when possible (this only really affects
6591 win32 and osx right now, because the new libevent with these
6592 features hasn't been released yet). Add code to suppress spurious
6594 - Prevent possible segfault in connection_close_unattached_ap().
6595 - Fix newlines on torrc in win32.
6596 - Improve error msgs when tor-resolve fails.
6598 o Improvements on 0.0.9.x:
6599 - New experimental script tor/contrib/ExerciseServer.py (needs more
6600 work) that uses the controller interface to build circuits and
6601 fetch pages over them. This will help us bootstrap servers that
6602 have lots of capacity but haven't noticed it yet.
6603 - New experimental script tor/contrib/PathDemo.py (needs more work)
6604 that uses the controller interface to let you choose whole paths
6606 "<hostname>.<path,separated by dots>.<length of path>.path"
6607 - When we've connected to an OR and handshaked but didn't like
6608 the result, we were closing the conn without sending destroy
6609 cells back for pending circuits. Now send those destroys.
6612 Changes in version 0.0.9.7 - 2005-04-01
6613 o Bugfixes on 0.0.9.x:
6614 - Fix another race crash bug (thanks to Glenn Fink for reporting).
6615 - Compare identity to identity, not to nickname, when extending to
6616 a router not already in the directory. This was preventing us from
6617 extending to unknown routers. Oops.
6618 - Make sure to create OS X Tor user in <500 range, so we aren't
6619 creating actual system users.
6620 - Note where connection-that-hasn't-sent-end was marked, and fix
6621 a few really loud instances of this harmless bug (it's fixed more
6625 Changes in version 0.1.0.1-rc - 2005-03-28
6627 - Add reachability testing. Your Tor server will automatically try
6628 to see if its ORPort and DirPort are reachable from the outside,
6629 and it won't upload its descriptor until it decides they are.
6630 - Handle unavailable hidden services better. Handle slow or busy
6631 hidden services better.
6632 - Add support for CONNECTing through https proxies, with "HttpsProxy"
6634 - New exit policy: accept most low-numbered ports, rather than
6635 rejecting most low-numbered ports.
6636 - More Tor controller support (still experimental). See
6637 http://tor.eff.org/doc/control-spec.txt for all the new features,
6638 including signals to emulate unix signals from any platform;
6639 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
6640 closestream; closecircuit; etc.
6641 - Make nt services work and start on startup on win32 (based on
6642 patch by Matt Edman).
6643 - Add a new AddressMap config directive to rewrite incoming socks
6644 addresses. This lets you, for example, declare an implicit
6645 required exit node for certain sites.
6646 - Add a new TrackHostExits config directive to trigger addressmaps
6647 for certain incoming socks addresses -- for sites that break when
6648 your exit keeps changing (based on patch by Mike Perry).
6649 - Redo the client-side dns cache so it's just an addressmap too.
6650 - Notice when our IP changes, and reset stats/uptime/reachability.
6651 - When an application is using socks5, give him the whole variety of
6652 potential socks5 responses (connect refused, host unreachable, etc),
6653 rather than just "success" or "failure".
6654 - A more sane version numbering system. See
6655 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
6656 - New contributed script "exitlist": a simple python script to
6657 parse directories and find Tor nodes that exit to listed
6659 - New contributed script "privoxy-tor-toggle" to toggle whether
6660 Privoxy uses Tor. Seems to be configured for Debian by default.
6661 - Report HTTP reasons to client when getting a response from directory
6662 servers -- so you can actually know what went wrong.
6663 - New config option MaxAdvertisedBandwidth which lets you advertise
6664 a low bandwidthrate (to not attract as many circuits) while still
6665 allowing a higher bandwidthrate in reality.
6667 o Robustness/stability fixes:
6668 - Make Tor use Niels Provos's libevent instead of its current
6669 poll-but-sometimes-select mess. This will let us use faster async
6670 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
6672 - pthread support now too. This was forced because when we forked,
6673 we ended up wasting a lot of duplicate ram over time. Also switch
6674 to foo_r versions of some library calls to allow reentry and
6676 - Better handling for heterogeneous / unreliable nodes:
6677 - Annotate circuits w/ whether they aim to contain high uptime nodes
6678 and/or high capacity nodes. When building circuits, choose
6680 - This means that every single node in an intro rend circuit,
6681 not just the last one, will have a minimum uptime.
6682 - New config option LongLivedPorts to indicate application streams
6683 that will want high uptime circuits.
6684 - Servers reset uptime when a dir fetch entirely fails. This
6685 hopefully reflects stability of the server's network connectivity.
6686 - If somebody starts his tor server in Jan 2004 and then fixes his
6687 clock, don't make his published uptime be a year.
6688 - Reset published uptime when you wake up from hibernation.
6689 - Introduce a notion of 'internal' circs, which are chosen without
6690 regard to the exit policy of the last hop. Intro and rendezvous
6691 circs must be internal circs, to avoid leaking information. Resolve
6692 and connect streams can use internal circs if they want.
6693 - New circuit pooling algorithm: make sure to have enough circs around
6694 to satisfy any predicted ports, and also make sure to have 2 internal
6695 circs around if we've required internal circs lately (and with high
6696 uptime if we've seen that lately too).
6697 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
6698 which describes how often we retry making new circuits if current
6699 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
6700 how long we're willing to make use of an already-dirty circuit.
6701 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
6702 circ as necessary, if there are any completed ones lying around
6703 when we try to launch one.
6704 - Make hidden services try to establish a rendezvous for 30 seconds,
6705 rather than for n (where n=3) attempts to build a circuit.
6706 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
6707 "ShutdownWaitLength".
6708 - Try to be more zealous about calling connection_edge_end when
6709 things go bad with edge conns in connection.c.
6710 - Revise tor-spec to add more/better stream end reasons.
6711 - Revise all calls to connection_edge_end to avoid sending "misc",
6712 and to take errno into account where possible.
6715 - Fix a race condition that can trigger an assert, when we have a
6716 pending create cell and an OR connection fails right then.
6717 - Fix several double-mark-for-close bugs, e.g. where we were finding
6718 a conn for a cell even if that conn is already marked for close.
6719 - Make sequence of log messages when starting on win32 with no config
6720 file more reasonable.
6721 - When choosing an exit node for a new non-internal circ, don't take
6722 into account whether it'll be useful for any pending x.onion
6723 addresses -- it won't.
6724 - Turn addr_policy_compare from a tristate to a quadstate; this should
6725 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
6726 for google.com" problem.
6727 - Make "platform" string in descriptor more accurate for Win32 servers,
6728 so it's not just "unknown platform".
6729 - Fix an edge case in parsing config options (thanks weasel).
6730 If they say "--" on the commandline, it's not an option.
6731 - Reject odd-looking addresses at the client (e.g. addresses that
6732 contain a colon), rather than having the server drop them because
6734 - tor-resolve requests were ignoring .exit if there was a working circuit
6735 they could use instead.
6736 - REUSEADDR on normal platforms means you can rebind to the port
6737 right after somebody else has let it go. But REUSEADDR on win32
6738 means to let you bind to the port _even when somebody else
6739 already has it bound_! So, don't do that on Win32.
6740 - Change version parsing logic: a version is "obsolete" if it is not
6741 recommended and (1) there is a newer recommended version in the
6742 same series, or (2) there are no recommended versions in the same
6743 series, but there are some recommended versions in a newer series.
6744 A version is "new" if it is newer than any recommended version in
6746 - Stop most cases of hanging up on a socks connection without sending
6750 - Require BandwidthRate to be at least 20kB/s for servers.
6751 - When a dirserver causes you to give a warn, mention which dirserver
6753 - New config option DirAllowPrivateAddresses for authdirservers.
6754 Now by default they refuse router descriptors that have non-IP or
6755 private-IP addresses.
6756 - Stop publishing socksport in the directory, since it's not
6757 actually meant to be public. For compatibility, publish a 0 there
6759 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
6760 smart" value, that is low for servers and high for clients.
6761 - If our clock jumps forward by 100 seconds or more, assume something
6762 has gone wrong with our network and abandon all not-yet-used circs.
6763 - Warn when exit policy implicitly allows local addresses.
6764 - If we get an incredibly skewed timestamp from a dirserver mirror
6765 that isn't a verified OR, don't warn -- it's probably him that's
6767 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
6768 cookies to disk and doesn't log each web request to disk. (Thanks
6769 to Brett Carrington for pointing this out.)
6770 - When a client asks us for a dir mirror and we don't have one,
6771 launch an attempt to get a fresh one.
6772 - If we're hibernating and we get a SIGINT, exit immediately.
6773 - Add --with-dmalloc ./configure option, to track memory leaks.
6774 - And try to free all memory on closing, so we can detect what
6776 - Cache local dns resolves correctly even when they're .exit
6778 - Give a better warning when some other server advertises an
6779 ORPort that is actually an apache running ssl.
6780 - Add "opt hibernating 1" to server descriptor to make it clearer
6781 whether the server is hibernating.
6784 Changes in version 0.0.9.6 - 2005-03-24
6785 o Bugfixes on 0.0.9.x (crashes and asserts):
6786 - Add new end stream reasons to maintainance branch. Fix bug where
6787 reason (8) could trigger an assert. Prevent bug from recurring.
6788 - Apparently win32 stat wants paths to not end with a slash.
6789 - Fix assert triggers in assert_cpath_layer_ok(), where we were
6790 blowing away the circuit that conn->cpath_layer points to, then
6791 checking to see if the circ is well-formed. Backport check to make
6792 sure we dont use the cpath on a closed connection.
6793 - Prevent circuit_resume_edge_reading_helper() from trying to package
6794 inbufs for marked-for-close streams.
6795 - Don't crash on hup if your options->address has become unresolvable.
6796 - Some systems (like OS X) sometimes accept() a connection and tell
6797 you the remote host is 0.0.0.0:0. If this happens, due to some
6798 other mis-features, we get confused; so refuse the conn for now.
6800 o Bugfixes on 0.0.9.x (other):
6801 - Fix harmless but scary "Unrecognized content encoding" warn message.
6802 - Add new stream error reason: TORPROTOCOL reason means "you are not
6803 speaking a version of Tor I understand; say bye-bye to your stream."
6804 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
6805 into the future, now that we are more tolerant of skew. This
6806 resolves a bug where a Tor server would refuse to cache a directory
6807 because all the directories it gets are too far in the future;
6808 yet the Tor server never logs any complaints about clock skew.
6809 - Mac packaging magic: make man pages useable, and do not overwrite
6810 existing torrc files.
6811 - Make OS X log happily to /var/log/tor/tor.log
6814 Changes in version 0.0.9.5 - 2005-02-22
6815 o Bugfixes on 0.0.9.x:
6816 - Fix an assert race at exit nodes when resolve requests fail.
6817 - Stop picking unverified dir mirrors--it only leads to misery.
6818 - Patch from Matt Edman to make NT services work better. Service
6819 support is still not compiled into the executable by default.
6820 - Patch from Dmitri Bely so the Tor service runs better under
6821 the win32 SYSTEM account.
6822 - Make tor-resolve actually work (?) on Win32.
6823 - Fix a sign bug when getrlimit claims to have 4+ billion
6824 file descriptors available.
6825 - Stop refusing to start when bandwidthburst == bandwidthrate.
6826 - When create cells have been on the onion queue more than five
6827 seconds, just send back a destroy and take them off the list.
6830 Changes in version 0.0.9.4 - 2005-02-03
6831 o Bugfixes on 0.0.9:
6832 - Fix an assert bug that took down most of our servers: when
6833 a server claims to have 1 GB of bandwidthburst, don't
6835 - Don't crash as badly if we have spawned the max allowed number
6836 of dnsworkers, or we're out of file descriptors.
6837 - Block more file-sharing ports in the default exit policy.
6838 - MaxConn is now automatically set to the hard limit of max
6839 file descriptors we're allowed (ulimit -n), minus a few for
6841 - Give a clearer message when servers need to raise their
6842 ulimit -n when they start running out of file descriptors.
6843 - SGI Compatibility patches from Jan Schaumann.
6844 - Tolerate a corrupt cached directory better.
6845 - When a dirserver hasn't approved your server, list which one.
6846 - Go into soft hibernation after 95% of the bandwidth is used,
6847 not 99%. This is especially important for daily hibernators who
6848 have a small accounting max. Hopefully it will result in fewer
6849 cut connections when the hard hibernation starts.
6850 - Load-balance better when using servers that claim more than
6851 800kB/s of capacity.
6852 - Make NT services work (experimental, only used if compiled in).
6855 Changes in version 0.0.9.3 - 2005-01-21
6856 o Bugfixes on 0.0.9:
6857 - Backport the cpu use fixes from main branch, so busy servers won't
6858 need as much processor time.
6859 - Work better when we go offline and then come back, or when we
6860 run Tor at boot before the network is up. We do this by
6861 optimistically trying to fetch a new directory whenever an
6862 application request comes in and we think we're offline -- the
6863 human is hopefully a good measure of when the network is back.
6864 - Backport some minimal hidserv bugfixes: keep rend circuits open as
6865 long as you keep using them; actually publish hidserv descriptors
6866 shortly after they change, rather than waiting 20-40 minutes.
6867 - Enable Mac startup script by default.
6868 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
6869 - When you update AllowUnverifiedNodes or FirewallPorts via the
6870 controller's setconf feature, we were always appending, never
6872 - When you update HiddenServiceDir via setconf, it was screwing up
6873 the order of reading the lines, making it fail.
6874 - Do not rewrite a cached directory back to the cache; otherwise we
6875 will think it is recent and not fetch a newer one on startup.
6876 - Workaround for webservers that lie about Content-Encoding: Tor
6877 now tries to autodetect compressed directories and compression
6878 itself. This lets us Proxypass dir fetches through apache.
6881 Changes in version 0.0.9.2 - 2005-01-04
6882 o Bugfixes on 0.0.9 (crashes and asserts):
6883 - Fix an assert on startup when the disk is full and you're logging
6885 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
6886 style address, then we'd crash.
6887 - Fix an assert trigger when the running-routers string we get from
6888 a dirserver is broken.
6889 - Make worker threads start and run on win32. Now win32 servers
6891 - Bandaid (not actually fix, but now it doesn't crash) an assert
6892 where the dns worker dies mysteriously and the main Tor process
6893 doesn't remember anything about the address it was resolving.
6895 o Bugfixes on 0.0.9 (Win32):
6896 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
6897 name out of the warning/assert messages.
6898 - Fix a superficial "unhandled error on read" bug on win32.
6899 - The win32 installer no longer requires a click-through for our
6900 license, since our Free Software license grants rights but does not
6902 - Win32: When connecting to a dirserver fails, try another one
6903 immediately. (This was already working for non-win32 Tors.)
6904 - Stop trying to parse $HOME on win32 when hunting for default
6906 - Make tor-resolve.c work on win32 by calling network_init().
6908 o Bugfixes on 0.0.9 (other):
6909 - Make 0.0.9.x build on Solaris again.
6910 - Due to a fencepost error, we were blowing away the \n when reporting
6911 confvalue items in the controller. So asking for multiple config
6912 values at once couldn't work.
6913 - When listing circuits that are pending on an opening OR connection,
6914 if we're an OR we were listing circuits that *end* at us as
6915 being pending on every listener, dns/cpu worker, etc. Stop that.
6916 - Dirservers were failing to create 'running-routers' or 'directory'
6917 strings if we had more than some threshold of routers. Fix them so
6918 they can handle any number of routers.
6919 - Fix a superficial "Duplicate mark for close" bug.
6920 - Stop checking for clock skew for OR connections, even for servers.
6921 - Fix a fencepost error that was chopping off the last letter of any
6922 nickname that is the maximum allowed nickname length.
6923 - Update URLs in log messages so they point to the new website.
6924 - Fix a potential problem in mangling server private keys while
6925 writing to disk (not triggered yet, as far as we know).
6926 - Include the licenses for other free software we include in Tor,
6927 now that we're shipping binary distributions more regularly.
6930 Changes in version 0.0.9.1 - 2004-12-15
6931 o Bugfixes on 0.0.9:
6932 - Make hibernation actually work.
6933 - Make HashedControlPassword config option work.
6934 - When we're reporting event circuit status to a controller,
6935 don't use the stream status code.
6938 Changes in version 0.0.9 - 2004-12-12
6940 - Clean up manpage and torrc.sample file.
6941 - Clean up severities and text of log warnings.
6943 - Make servers trigger an assert when they enter hibernation.
6946 Changes in version 0.0.9rc7 - 2004-12-08
6947 o Bugfixes on 0.0.9rc:
6948 - Fix a stack-trashing crash when an exit node begins hibernating.
6949 - Avoid looking at unallocated memory while considering which
6950 ports we need to build circuits to cover.
6951 - Stop a sigpipe: when an 'end' cell races with eof from the app,
6952 we shouldn't hold-open-until-flush if the eof arrived first.
6953 - Fix a bug with init_cookie_authentication() in the controller.
6954 - When recommending new-format log lines, if the upper bound is
6955 LOG_ERR, leave it implicit.
6957 o Bugfixes on 0.0.8.1:
6958 - Fix a whole slew of memory leaks.
6959 - Fix isspace() and friends so they still make Solaris happy
6960 but also so they don't trigger asserts on win32.
6961 - Fix parse_iso_time on platforms without strptime (eg win32).
6962 - win32: tolerate extra "readable" events better.
6963 - win32: when being multithreaded, leave parent fdarray open.
6964 - Make unit tests work on win32.
6967 Changes in version 0.0.9rc6 - 2004-12-06
6968 o Bugfixes on 0.0.9pre:
6969 - Clean up some more integer underflow opportunities (not exploitable
6971 - While hibernating, hup should not regrow our listeners.
6972 - Send an end to the streams we close when we hibernate, rather
6973 than just chopping them off.
6974 - React to eof immediately on non-open edge connections.
6976 o Bugfixes on 0.0.8.1:
6977 - Calculate timeout for waiting for a connected cell from the time
6978 we sent the begin cell, not from the time the stream started. If
6979 it took a long time to establish the circuit, we would time out
6980 right after sending the begin cell.
6981 - Fix router_compare_addr_to_addr_policy: it was not treating a port
6982 of * as always matching, so we were picking reject *:* nodes as
6983 exit nodes too. Oops.
6986 - New circuit building strategy: keep a list of ports that we've
6987 used in the past 6 hours, and always try to have 2 circuits open
6988 or on the way that will handle each such port. Seed us with port
6989 80 so web users won't complain that Tor is "slow to start up".
6990 - Make kill -USR1 dump more useful stats about circuits.
6991 - When warning about retrying or giving up, print the address, so
6992 the user knows which one it's talking about.
6993 - If you haven't used a clean circuit in an hour, throw it away,
6994 just to be on the safe side. (This means after 6 hours a totally
6995 unused Tor client will have no circuits open.)
6998 Changes in version 0.0.9rc5 - 2004-12-01
6999 o Bugfixes on 0.0.8.1:
7000 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
7001 - Let resolve conns retry/expire also, rather than sticking around
7003 - If we are using select, make sure we stay within FD_SETSIZE.
7005 o Bugfixes on 0.0.9pre:
7006 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
7007 but doesn't seem to be currently; thanks to Ilja van Sprundel for
7009 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
7010 instead. Impose minima and maxima for all *Period options; impose
7011 even tighter maxima for fetching if we are a caching dirserver.
7012 Clip rather than rejecting.
7013 - Fetch cached running-routers from servers that serve it (that is,
7014 authdirservers and servers running 0.0.9rc5-cvs or later.)
7017 - Accept *:706 (silc) in default exit policy.
7018 - Implement new versioning format for post 0.1.
7019 - Support "foo.nickname.exit" addresses, to let Alice request the
7020 address "foo" as viewed by exit node "nickname". Based on a patch
7022 - Make tor --version --version dump the cvs Id of every file.
7025 Changes in version 0.0.9rc4 - 2004-11-28
7026 o Bugfixes on 0.0.8.1:
7027 - Make windows sockets actually non-blocking (oops), and handle
7028 win32 socket errors better.
7030 o Bugfixes on 0.0.9rc1:
7031 - Actually catch the -USR2 signal.
7034 Changes in version 0.0.9rc3 - 2004-11-25
7035 o Bugfixes on 0.0.8.1:
7036 - Flush the log file descriptor after we print "Tor opening log file",
7037 so we don't see those messages days later.
7039 o Bugfixes on 0.0.9rc1:
7040 - Make tor-resolve work again.
7041 - Avoid infinite loop in tor-resolve if tor hangs up on it.
7042 - Fix an assert trigger for clients/servers handling resolves.
7045 Changes in version 0.0.9rc2 - 2004-11-24
7046 o Bugfixes on 0.0.9rc1:
7047 - I broke socks5 support while fixing the eof bug.
7048 - Allow unitless bandwidths and intervals; they default to bytes
7050 - New servers don't start out hibernating; they are active until
7051 they run out of bytes, so they have a better estimate of how
7052 long it takes, and so their operators can know they're working.
7055 Changes in version 0.0.9rc1 - 2004-11-23
7056 o Bugfixes on 0.0.8.1:
7057 - Finally fix a bug that's been plaguing us for a year:
7058 With high load, circuit package window was reaching 0. Whenever
7059 we got a circuit-level sendme, we were reading a lot on each
7060 socket, but only writing out a bit. So we would eventually reach
7061 eof. This would be noticed and acted on even when there were still
7062 bytes sitting in the inbuf.
7063 - When poll() is interrupted, we shouldn't believe the revents values.
7065 o Bugfixes on 0.0.9pre6:
7066 - Fix hibernate bug that caused pre6 to be broken.
7067 - Don't keep rephist info for routers that haven't had activity for
7068 24 hours. (This matters now that clients have keys, since we track
7070 - Never call close_temp_logs while validating log options.
7071 - Fix backslash-escaping on tor.sh.in and torctl.in.
7074 - Implement weekly/monthly/daily accounting: now you specify your
7075 hibernation properties by
7076 AccountingMax N bytes|KB|MB|GB|TB
7077 AccountingStart day|week|month [day] HH:MM
7078 Defaults to "month 1 0:00".
7079 - Let bandwidth and interval config options be specified as 5 bytes,
7080 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
7081 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
7082 get back to normal.)
7083 - If your requested entry or exit node has advertised bandwidth 0,
7085 - Be more greedy about filling up relay cells -- we try reading again
7086 once we've processed the stuff we read, in case enough has arrived
7087 to fill the last cell completely.
7088 - Apply NT service patch from Osamu Fujino. Still needs more work.
7091 Changes in version 0.0.9pre6 - 2004-11-15
7092 o Bugfixes on 0.0.8.1:
7093 - Fix assert failure on malformed socks4a requests.
7094 - Use identity comparison, not nickname comparison, to choose which
7095 half of circuit-ID-space each side gets to use. This is needed
7096 because sometimes we think of a router as a nickname, and sometimes
7097 as a hex ID, and we can't predict what the other side will do.
7098 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
7099 write() call will fail and we handle it there.
7100 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
7101 and smartlist_len, which are two major profiling offenders.
7103 o Bugfixes on 0.0.9pre5:
7104 - Fix a bug in read_all that was corrupting config files on windows.
7105 - When we're raising the max number of open file descriptors to
7106 'unlimited', don't log that we just raised it to '-1'.
7107 - Include event code with events, as required by control-spec.txt.
7108 - Don't give a fingerprint when clients do --list-fingerprint:
7109 it's misleading, because it will never be the same again.
7110 - Stop using strlcpy in tor_strndup, since it was slowing us
7112 - Remove warn on startup about missing cached-directory file.
7113 - Make kill -USR1 work again.
7114 - Hibernate if we start tor during the "wait for wakeup-time" phase
7115 of an accounting interval. Log our hibernation plans better.
7116 - Authoritative dirservers now also cache their directory, so they
7117 have it on start-up.
7120 - Fetch running-routers; cache running-routers; compress
7121 running-routers; serve compressed running-routers.z
7122 - Add NSI installer script contributed by J Doe.
7123 - Commit VC6 and VC7 workspace/project files.
7124 - Commit a tor.spec for making RPM files, with help from jbash.
7125 - Add contrib/torctl.in contributed by Glenn Fink.
7126 - Implement the control-spec's SAVECONF command, to write your
7127 configuration to torrc.
7128 - Get cookie authentication for the controller closer to working.
7129 - Include control-spec.txt in the tarball.
7130 - When set_conf changes our server descriptor, upload a new copy.
7131 But don't upload it too often if there are frequent changes.
7132 - Document authentication config in man page, and document signals
7134 - Clean up confusing parts of man page and torrc.sample.
7135 - Make expand_filename handle ~ and ~username.
7136 - Use autoconf to enable largefile support where necessary. Use
7137 ftello where available, since ftell can fail at 2GB.
7138 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
7139 log more informatively.
7140 - Give a slightly more useful output for "tor -h".
7141 - Refuse application socks connections to port 0.
7142 - Check clock skew for verified servers, but allow unverified
7143 servers and clients to have any clock skew.
7144 - Break DirFetchPostPeriod into:
7145 - DirFetchPeriod for fetching full directory,
7146 - StatusFetchPeriod for fetching running-routers,
7147 - DirPostPeriod for posting server descriptor,
7148 - RendPostPeriod for posting hidden service descriptors.
7149 - Make sure the hidden service descriptors are at a random offset
7150 from each other, to hinder linkability.
7153 Changes in version 0.0.9pre5 - 2004-11-09
7154 o Bugfixes on 0.0.9pre4:
7155 - Fix a seg fault in unit tests (doesn't affect main program).
7156 - Fix an assert bug where a hidden service provider would fail if
7157 the first hop of his rendezvous circuit was down.
7158 - Hidden service operators now correctly handle version 1 style
7159 INTRODUCE1 cells (nobody generates them still, so not a critical
7161 - If do_hup fails, actually notice.
7162 - Handle more errnos from accept() without closing the listener.
7163 Some OpenBSD machines were closing their listeners because
7164 they ran out of file descriptors.
7165 - Send resolve cells to exit routers that are running a new
7166 enough version of the resolve code to work right.
7167 - Better handling of winsock includes on non-MSV win32 compilers.
7168 - Some people had wrapped their tor client/server in a script
7169 that would restart it whenever it died. This did not play well
7170 with our "shut down if your version is obsolete" code. Now people
7171 don't fetch a new directory if their local cached version is
7173 - Make our autogen.sh work on ksh as well as bash.
7176 - Hibernation: New config option "AccountingMaxKB" lets you
7177 set how many KBytes per month you want to allow your server to
7178 consume. Rather than spreading those bytes out evenly over the
7179 month, we instead hibernate for some of the month and pop up
7180 at a deterministic time, work until the bytes are consumed, then
7181 hibernate again. Config option "MonthlyAccountingStart" lets you
7182 specify which day of the month your billing cycle starts on.
7183 - Control interface: a separate program can now talk to your
7184 client/server over a socket, and get/set config options, receive
7185 notifications of circuits and streams starting/finishing/dying,
7186 bandwidth used, etc. The next step is to get some GUIs working.
7187 Let us know if you want to help out. See doc/control-spec.txt .
7188 - Ship a contrib/tor-control.py as an example script to interact
7189 with the control port.
7190 - "tor --hash-password zzyxz" will output a salted password for
7191 use in authenticating to the control interface.
7192 - New log format in config:
7193 "Log minsev[-maxsev] stdout|stderr|syslog" or
7194 "Log minsev[-maxsev] file /var/foo"
7197 - DirPolicy config option, to let people reject incoming addresses
7198 from their dirserver.
7199 - "tor --list-fingerprint" will list your identity key fingerprint
7201 - Add "pass" target for RedirectExit, to make it easier to break
7202 out of a sequence of RedirectExit rules.
7203 - Clients now generate a TLS cert too, in preparation for having
7204 them act more like real nodes.
7205 - Ship src/win32/ in the tarball, so people can use it to build.
7206 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
7208 - New "router-status" line in directory, to better bind each verified
7209 nickname to its identity key.
7210 - Deprecate unofficial config option abbreviations, and abbreviations
7211 not on the command line.
7212 - Add a pure-C tor-resolve implementation.
7213 - Use getrlimit and friends to ensure we can reach MaxConn (currently
7214 1024) file descriptors.
7216 o Code security improvements, inspired by Ilja:
7217 - Replace sprintf with snprintf. (I think they were all safe, but
7219 - Replace strcpy/strncpy with strlcpy in more places.
7220 - Avoid strcat; use snprintf or strlcat instead.
7221 - snprintf wrapper with consistent (though not C99) overflow behavior.
7224 Changes in version 0.0.9pre4 - 2004-10-17
7225 o Bugfixes on 0.0.9pre3:
7226 - If the server doesn't specify an exit policy, use the real default
7227 exit policy, not reject *:*.
7228 - Ignore fascistfirewall when uploading/downloading hidden service
7229 descriptors, since we go through Tor for those; and when using
7230 an HttpProxy, since we assume it can reach them all.
7231 - When looking for an authoritative dirserver, use only the ones
7232 configured at boot. Don't bother looking in the directory.
7233 - The rest of the fix for get_default_conf_file() on older win32.
7234 - Make 'Routerfile' config option obsolete.
7237 - New 'MyFamily nick1,...' config option for a server to
7238 specify other servers that shouldn't be used in the same circuit
7239 with it. Only believed if nick1 also specifies us.
7240 - New 'NodeFamily nick1,nick2,...' config option for a client to
7241 specify nodes that it doesn't want to use in the same circuit.
7242 - New 'Redirectexit pattern address:port' config option for a
7243 server to redirect exit connections, e.g. to a local squid.
7246 Changes in version 0.0.9pre3 - 2004-10-13
7247 o Bugfixes on 0.0.8.1:
7248 - Better torrc example lines for dirbindaddress and orbindaddress.
7249 - Improved bounds checking on parsed ints (e.g. config options and
7250 the ones we find in directories.)
7251 - Better handling of size_t vs int, so we're more robust on 64
7253 - Fix the rest of the bug where a newly started OR would appear
7254 as unverified even after we've added his fingerprint and hupped
7256 - Fix a bug from 0.0.7: when read() failed on a stream, we would
7257 close it without sending back an end. So 'connection refused'
7258 would simply be ignored and the user would get no response.
7260 o Bugfixes on 0.0.9pre2:
7261 - Serving the cached-on-disk directory to people is bad. We now
7262 provide no directory until we've fetched a fresh one.
7263 - Workaround for bug on windows where cached-directories get crlf
7265 - Make get_default_conf_file() work on older windows too.
7266 - If we write a *:* exit policy line in the descriptor, don't write
7267 any more exit policy lines.
7270 - Use only 0.0.9pre1 and later servers for resolve cells.
7271 - Make the dirservers file obsolete.
7272 - Include a dir-signing-key token in directories to tell the
7273 parsing entity which key is being used to sign.
7274 - Remove the built-in bulky default dirservers string.
7275 - New config option "Dirserver %s:%d [fingerprint]", which can be
7276 repeated as many times as needed. If no dirservers specified,
7277 default to moria1,moria2,tor26.
7278 - Make moria2 advertise a dirport of 80, so people behind firewalls
7279 will be able to get a directory.
7280 - Http proxy support
7281 - Dirservers translate requests for http://%s:%d/x to /x
7282 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
7283 be routed through this host.
7284 - Clients ask for /tor/x rather than /x for new enough dirservers.
7285 This way we can one day coexist peacefully with apache.
7286 - Clients specify a "Host: %s%d" http header, to be compatible
7287 with more proxies, and so running squid on an exit node can work.
7290 Changes in version 0.0.8.1 - 2004-10-13
7292 - Fix a seg fault that can be triggered remotely for Tor
7293 clients/servers with an open dirport.
7294 - Fix a rare assert trigger, where routerinfos for entries in
7295 our cpath would expire while we're building the path.
7296 - Fix a bug in OutboundBindAddress so it (hopefully) works.
7297 - Fix a rare seg fault for people running hidden services on
7298 intermittent connections.
7299 - Fix a bug in parsing opt keywords with objects.
7300 - Fix a stale pointer assert bug when a stream detaches and
7302 - Fix a string format vulnerability (probably not exploitable)
7303 in reporting stats locally.
7304 - Fix an assert trigger: sometimes launching circuits can fail
7305 immediately, e.g. because too many circuits have failed recently.
7306 - Fix a compile warning on 64 bit platforms.
7309 Changes in version 0.0.9pre2 - 2004-10-03
7311 - Make fetching a cached directory work for 64-bit platforms too.
7312 - Make zlib.h a required header, not an optional header.
7315 Changes in version 0.0.9pre1 - 2004-10-01
7317 - Stop using separate defaults for no-config-file and
7318 empty-config-file. Now you have to explicitly turn off SocksPort,
7319 if you don't want it open.
7320 - Fix a bug in OutboundBindAddress so it (hopefully) works.
7321 - Improve man page to mention more of the 0.0.8 features.
7322 - Fix a rare seg fault for people running hidden services on
7323 intermittent connections.
7324 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
7326 - Fix more dns related bugs: send back resolve_failed and end cells
7327 more reliably when the resolve fails, rather than closing the
7328 circuit and then trying to send the cell. Also attach dummy resolve
7329 connections to a circuit *before* calling dns_resolve(), to fix
7330 a bug where cached answers would never be sent in RESOLVED cells.
7331 - When we run out of disk space, or other log writing error, don't
7332 crash. Just stop logging to that log and continue.
7333 - We were starting to daemonize before we opened our logs, so if
7334 there were any problems opening logs, we would complain to stderr,
7335 which wouldn't work, and then mysteriously exit.
7336 - Fix a rare bug where sometimes a verified OR would connect to us
7337 before he'd uploaded his descriptor, which would cause us to
7338 assign conn->nickname as though he's unverified. Now we look through
7339 the fingerprint list to see if he's there.
7340 - Fix a rare assert trigger, where routerinfos for entries in
7341 our cpath would expire while we're building the path.
7344 - Clients can ask dirservers for /dir.z to get a compressed version
7345 of the directory. Only works for servers running 0.0.9, of course.
7346 - Make clients cache directories and use them to seed their router
7347 lists at startup. This means clients have a datadir again.
7348 - Configuration infrastructure support for warning on obsolete
7350 - Respond to content-encoding headers by trying to uncompress as
7352 - Reply with a deflated directory when a client asks for "dir.z".
7353 We could use allow-encodings instead, but allow-encodings isn't
7354 specified in HTTP 1.0.
7355 - Raise the max dns workers from 50 to 100.
7356 - Discourage people from setting their dirfetchpostperiod more often
7357 than once per minute.
7358 - Protect dirservers from overzealous descriptor uploading -- wait
7359 10 seconds after directory gets dirty, before regenerating.
7362 Changes in version 0.0.8 - 2004-08-25
7363 o Port it to SunOS 5.9 / Athena
7366 Changes in version 0.0.8rc2 - 2004-08-20
7367 o Make it compile on cygwin again.
7368 o When picking unverified routers, skip those with low uptime and/or
7369 low bandwidth, depending on what properties you care about.
7372 Changes in version 0.0.8rc1 - 2004-08-18
7373 o Changes from 0.0.7.3:
7375 - Fix assert triggers: if the other side returns an address 0.0.0.0,
7376 don't put it into the client dns cache.
7377 - If a begin failed due to exit policy, but we believe the IP address
7378 should have been allowed, switch that router to exitpolicy reject *:*
7379 until we get our next directory.
7381 - Clients choose nodes proportional to advertised bandwidth.
7382 - Avoid using nodes with low uptime as introduction points.
7383 - Handle servers with dynamic IP addresses: don't replace
7384 options->Address with the resolved one at startup, and
7385 detect our address right before we make a routerinfo each time.
7386 - 'FascistFirewall' option to pick dirservers and ORs on specific
7387 ports; plus 'FirewallPorts' config option to tell FascistFirewall
7388 which ports are open. (Defaults to 80,443)
7389 - Be more aggressive about trying to make circuits when the network
7390 has changed (e.g. when you unsuspend your laptop).
7391 - Check for time skew on http headers; report date in response to
7393 - If the entrynode config line has only one node, don't pick it as
7395 - Add strict{entry|exit}nodes config options. If set to 1, then
7396 we refuse to build circuits that don't include the specified entry
7398 - OutboundBindAddress config option, to bind to a specific
7399 IP address for outgoing connect()s.
7400 - End truncated log entries (e.g. directories) with "[truncated]".
7402 o Patches to 0.0.8preX:
7404 - Patches to compile and run on win32 again (maybe)?
7405 - Fix crash when looking for ~/.torrc with no $HOME set.
7406 - Fix a race bug in the unit tests.
7407 - Handle verified/unverified name collisions better when new
7408 routerinfo's arrive in a directory.
7409 - Sometimes routers were getting entered into the stats before
7410 we'd assigned their identity_digest. Oops.
7411 - Only pick and establish intro points after we've gotten a
7414 - AllowUnverifiedNodes config option to let circuits choose no-name
7415 routers in entry,middle,exit,introduction,rendezvous positions.
7416 Allow middle and rendezvous positions by default.
7417 - Add a man page for tor-resolve.
7420 Changes in version 0.0.7.3 - 2004-08-12
7421 o Stop dnsworkers from triggering an assert failure when you
7422 ask them to resolve the host "".
7425 Changes in version 0.0.8pre3 - 2004-08-09
7426 o Changes from 0.0.7.2:
7427 - Allow multiple ORs with same nickname in routerlist -- now when
7428 people give us one identity key for a nickname, then later
7429 another, we don't constantly complain until the first expires.
7430 - Remember used bandwidth (both in and out), and publish 15-minute
7431 snapshots for the past day into our descriptor.
7432 - You can now fetch $DIRURL/running-routers to get just the
7433 running-routers line, not the whole descriptor list. (But
7434 clients don't use this yet.)
7435 - When people mistakenly use Tor as an http proxy, point them
7436 at the tor-doc.html rather than the INSTALL.
7437 - Remove our mostly unused -- and broken -- hex_encode()
7438 function. Use base16_encode() instead. (Thanks to Timo Lindfors
7439 for pointing out this bug.)
7440 - Rotate onion keys every 12 hours, not every 2 hours, so we have
7441 fewer problems with people using the wrong key.
7442 - Change the default exit policy to reject the default edonkey,
7443 kazaa, gnutella ports.
7444 - Add replace_file() to util.[ch] to handle win32's rename().
7446 o Changes from 0.0.8preX:
7447 - Fix two bugs in saving onion keys to disk when rotating, so
7448 hopefully we'll get fewer people using old onion keys.
7449 - Fix an assert error that was making SocksPolicy not work.
7450 - Be willing to expire routers that have an open dirport -- it's
7451 just the authoritative dirservers we want to not forget.
7452 - Reject tor-resolve requests for .onion addresses early, so we
7453 don't build a whole rendezvous circuit and then fail.
7454 - When you're warning a server that he's unverified, don't cry
7456 - Fix a race condition: don't try to extend onto a connection
7457 that's still handshaking.
7458 - For servers in clique mode, require the conn to be open before
7459 you'll choose it for your path.
7460 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
7461 end relay cell, etc.
7462 - Measure bandwidth capacity over the last 24 hours, not just 12
7463 - Bugfix: authoritative dirservers were making and signing a new
7464 directory for each client, rather than reusing the cached one.
7467 Changes in version 0.0.8pre2 - 2004-08-04
7468 o Changes from 0.0.7.2:
7470 - Check directory signature _before_ you decide whether you're
7471 you're running an obsolete version and should exit.
7472 - Check directory signature _before_ you parse the running-routers
7473 list to decide who's running or verified.
7474 - Bugfixes and features:
7475 - Check return value of fclose while writing to disk, so we don't
7476 end up with broken files when servers run out of disk space.
7477 - Log a warning if the user uses an unsafe socks variant, so people
7478 are more likely to learn about privoxy or socat.
7479 - Dirservers now include RFC1123-style dates in the HTTP headers,
7480 which one day we will use to better detect clock skew.
7482 o Changes from 0.0.8pre1:
7483 - Make it compile without warnings again on win32.
7484 - Log a warning if you're running an unverified server, to let you
7485 know you might want to get it verified.
7486 - Only pick a default nickname if you plan to be a server.
7489 Changes in version 0.0.8pre1 - 2004-07-23
7491 - Made our unit tests compile again on OpenBSD 3.5, and tor
7492 itself compile again on OpenBSD on a sparc64.
7493 - We were neglecting milliseconds when logging on win32, so
7494 everything appeared to happen at the beginning of each second.
7497 - 'Extend' relay cell payloads now include the digest of the
7498 intended next hop's identity key. Now we can verify that we're
7499 extending to the right router, and also extend to routers we
7500 hadn't heard of before.
7503 - Tor nodes can now act as relays (with an advertised ORPort)
7504 without being manually verified by the dirserver operators.
7505 - Uploaded descriptors of unverified routers are now accepted
7506 by the dirservers, and included in the directory.
7507 - Verified routers are listed by nickname in the running-routers
7508 list; unverified routers are listed as "$<fingerprint>".
7509 - We now use hash-of-identity-key in most places rather than
7510 nickname or addr:port, for improved security/flexibility.
7511 - To avoid Sybil attacks, paths still use only verified servers.
7512 But now we have a chance to play around with hybrid approaches.
7513 - Nodes track bandwidth usage to estimate capacity (not used yet).
7514 - ClientOnly option for nodes that never want to become servers.
7515 - Directory caching.
7516 - "AuthoritativeDir 1" option for the official dirservers.
7517 - Now other nodes (clients and servers) will cache the latest
7518 directory they've pulled down.
7519 - They can enable their DirPort to serve it to others.
7520 - Clients will pull down a directory from any node with an open
7521 DirPort, and check the signature/timestamp correctly.
7522 - Authoritative dirservers now fetch directories from other
7523 authdirservers, to stay better synced.
7524 - Running-routers list tells who's down also, along with noting
7525 if they're verified (listed by nickname) or unverified (listed
7527 - Allow dirservers to serve running-router list separately.
7528 This isn't used yet.
7529 - ORs connect-on-demand to other ORs
7530 - If you get an extend cell to an OR you're not connected to,
7531 connect, handshake, and forward the create cell.
7532 - The authoritative dirservers stay connected to everybody,
7533 and everybody stays connected to 0.0.7 servers, but otherwise
7534 clients/servers expire unused connections after 5 minutes.
7535 - When servers get a sigint, they delay 30 seconds (refusing new
7536 connections) then exit. A second sigint causes immediate exit.
7537 - File and name management:
7538 - Look for .torrc if no CONFDIR "torrc" is found.
7539 - If no datadir is defined, then choose, make, and secure ~/.tor
7541 - If torrc not found, exitpolicy reject *:*.
7542 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
7543 - If no nickname is defined, derive default from hostname.
7544 - Rename secret key files, e.g. identity.key -> secret_id_key,
7545 to discourage people from mailing their identity key to tor-ops.
7546 - Refuse to build a circuit before the directory has arrived --
7547 it won't work anyway, since you won't know the right onion keys
7549 - Try other dirservers immediately if the one you try is down. This
7550 should tolerate down dirservers better now.
7551 - Parse tor version numbers so we can do an is-newer-than check
7552 rather than an is-in-the-list check.
7553 - New socks command 'resolve', to let us shim gethostbyname()
7555 - A 'tor_resolve' script to access the socks resolve functionality.
7556 - A new socks-extensions.txt doc file to describe our
7557 interpretation and extensions to the socks protocols.
7558 - Add a ContactInfo option, which gets published in descriptor.
7559 - Publish OR uptime in descriptor (and thus in directory) too.
7560 - Write tor version at the top of each log file
7561 - New docs in the tarball:
7563 - Document that you should proxy your SSL traffic too.
7566 Changes in version 0.0.7.2 - 2004-07-07
7567 o A better fix for the 0.0.0.0 problem, that will hopefully
7568 eliminate the remaining related assertion failures.
7571 Changes in version 0.0.7.1 - 2004-07-04
7572 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
7573 since internally we use 0.0.0.0 to signify "not yet resolved".
7576 Changes in version 0.0.7 - 2004-06-07
7577 o Updated the man page to reflect the new features.
7580 Changes in version 0.0.7rc2 - 2004-06-06
7581 o Changes from 0.0.7rc1:
7582 - Make it build on Win32 again.
7583 o Changes from 0.0.6.2:
7584 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
7588 Changes in version 0.0.7rc1 - 2004-06-02
7590 - On sighup, we were adding another log without removing the first
7591 one. So log messages would get duplicated n times for n sighups.
7592 - Several cases of using a connection after we'd freed it. The
7593 problem was that connections that are pending resolve are in both
7594 the pending_resolve tree, and also the circuit's resolving_streams
7595 list. When you want to remove one, you must remove it from both.
7596 - Fix a double-mark-for-close where an end cell arrived for a
7597 resolving stream, and then the resolve failed.
7598 - Check directory signatures based on name of signer, not on whom
7599 we got the directory from. This will let us cache directories more
7602 - Crank up some of our constants to handle more users.
7605 Changes in version 0.0.7pre1 - 2004-06-02
7606 o Fixes for crashes and other obnoxious bugs:
7607 - Fix an epipe bug: sometimes when directory connections failed
7608 to connect, we would give them a chance to flush before closing
7610 - When we detached from a circuit because of resolvefailed, we
7611 would immediately try the same circuit twice more, and then
7612 give up on the resolve thinking we'd tried three different
7614 - Limit the number of intro circuits we'll attempt to build for a
7615 hidden service per 15-minute period.
7616 - Check recommended-software string *early*, before actually parsing
7617 the directory. Thus we can detect an obsolete version and exit,
7618 even if the new directory format doesn't parse.
7619 o Fixes for security bugs:
7620 - Remember which nodes are dirservers when you startup, and if a
7621 random OR enables his dirport, don't automatically assume he's
7622 a trusted dirserver.
7624 - Directory connections were asking the wrong poll socket to
7625 start writing, and not asking themselves to start writing.
7626 - When we detached from a circuit because we sent a begin but
7627 didn't get a connected, we would use it again the first time;
7628 but after that we would correctly switch to a different one.
7629 - Stop warning when the first onion decrypt attempt fails; they
7630 will sometimes legitimately fail now that we rotate keys.
7631 - Override unaligned-access-ok check when $host_cpu is ia64 or
7632 arm. Apparently they allow it but the kernel whines.
7633 - Dirservers try to reconnect periodically too, in case connections
7635 - Fix some memory leaks in directory servers.
7636 - Allow backslash in Win32 filenames.
7637 - Made Tor build complain-free on FreeBSD, hopefully without
7638 breaking other BSD builds. We'll see.
7640 - Doxygen markup on all functions and global variables.
7641 - Make directory functions update routerlist, not replace it. So
7642 now directory disagreements are not so critical a problem.
7643 - Remove the upper limit on number of descriptors in a dirserver's
7644 directory (not that we were anywhere close).
7645 - Allow multiple logfiles at different severity ranges.
7646 - Allow *BindAddress to specify ":port" rather than setting *Port
7647 separately. Allow multiple instances of each BindAddress config
7648 option, so you can bind to multiple interfaces if you want.
7649 - Allow multiple exit policy lines, which are processed in order.
7650 Now we don't need that huge line with all the commas in it.
7651 - Enable accept/reject policies on SOCKS connections, so you can bind
7652 to 0.0.0.0 but still control who can use your OP.
7655 Changes in version 0.0.6.2 - 2004-05-16
7656 o Our integrity-checking digest was checking only the most recent cell,
7657 not the previous cells like we'd thought.
7658 Thanks to Stefan Mark for finding the flaw!
7661 Changes in version 0.0.6.1 - 2004-05-06
7662 o Fix two bugs in our AES counter-mode implementation (this affected
7663 onion-level stream encryption, but not TLS-level). It turns
7664 out we were doing something much more akin to a 16-character
7665 polyalphabetic cipher. Oops.
7666 Thanks to Stefan Mark for finding the flaw!
7667 o Retire moria3 as a directory server, and add tor26 as a directory
7671 Changes in version 0.0.6 - 2004-05-02
7675 Changes in version 0.0.6rc4 - 2004-05-01
7676 o Update the built-in dirservers list to use the new directory format
7677 o Fix a rare seg fault: if a node offering a hidden service attempts
7678 to build a circuit to Alice's rendezvous point and fails before it
7679 reaches the last hop, it retries with a different circuit, but
7681 o Handle windows socket errors correctly.
7684 Changes in version 0.0.6rc3 - 2004-04-28
7685 o Don't expire non-general excess circuits (if we had enough
7686 circuits open, we were expiring rendezvous circuits -- even
7687 when they had a stream attached. oops.)
7688 o Fetch randomness from /dev/urandom better (not via fopen/fread)
7689 o Better debugging for tls errors
7690 o Some versions of openssl have an SSL_pending function that erroneously
7691 returns bytes when there is a non-application record pending.
7692 o Set Content-Type on the directory and hidserv descriptor.
7693 o Remove IVs from cipher code, since AES-ctr has none.
7694 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
7695 o We were using an array of length zero in a few places.
7696 o win32's gethostbyname can't resolve an IP to an IP.
7697 o win32's close can't close a socket.
7700 Changes in version 0.0.6rc2 - 2004-04-26
7701 o Fix a bug where we were closing tls connections intermittently.
7702 It turns out openssl keeps its errors around -- so if an error
7703 happens, and you don't ask about it, and then another openssl
7704 operation happens and succeeds, and you ask if there was an error,
7705 it tells you about the first error. Fun fun.
7706 o Fix a bug that's been lurking since 27 may 03 (!)
7707 When passing back a destroy cell, we would use the wrong circ id.
7708 'Mostly harmless', but still worth fixing.
7709 o Since we don't support truncateds much, don't bother sending them;
7710 just close the circ.
7711 o check for <machine/limits.h> so we build on NetBSD again (I hope).
7712 o don't crash if a conn that sent a begin has suddenly lost its circuit
7713 (this was quite rare).
7716 Changes in version 0.0.6rc1 - 2004-04-25
7717 o We now rotate link (tls context) keys and onion keys.
7718 o CREATE cells now include oaep padding, so you can tell
7719 if you decrypted them correctly.
7720 o Add bandwidthburst to server descriptor.
7721 o Directories now say which dirserver signed them.
7722 o Use a tor_assert macro that logs failed assertions too.
7725 Changes in version 0.0.6pre5 - 2004-04-18
7726 o changes from 0.0.6pre4:
7727 - make tor build on broken freebsd 5.2 installs
7728 - fix a failed assert when you try an intro point, get a nack, and try
7729 a second one and it works.
7730 - when alice uses a port that the hidden service doesn't accept,
7731 it now sends back an end cell (denied by exit policy). otherwise
7732 alice would just have to wait to time out.
7733 - fix another rare bug: when we had tried all the intro
7734 points for a hidden service, we fetched the descriptor
7735 again, but we left our introcirc thinking it had already
7736 sent an intro, so it kept waiting for a response...
7737 - bugfix: when you sleep your hidden-service laptop, as soon
7738 as it wakes up it tries to upload a service descriptor, but
7739 socketpair fails for some reason (localhost not up yet?).
7740 now we simply give up on that upload, and we'll try again later.
7741 i'd still like to find the bug though.
7742 - if an intro circ waiting for an ack dies before getting one, then
7744 - we were reusing stale service descriptors and refetching usable
7748 Changes in version 0.0.6pre4 - 2004-04-14
7749 o changes from 0.0.6pre3:
7750 - when bob fails to connect to the rendezvous point, and his
7751 circ didn't fail because of the rendezvous point itself, then
7752 he retries a couple of times
7753 - we expire introduction and rendezvous circs more thoroughly
7754 (sometimes they were hanging around forever)
7755 - we expire unattached rendezvous streams that have been around
7756 too long (they were sticking around forever).
7757 - fix a measly fencepost error that was crashing everybody with
7761 Changes in version 0.0.6pre3 - 2004-04-14
7762 o changes from 0.0.6pre2:
7763 - make hup work again
7764 - fix some memory leaks for dirservers
7765 - allow more skew in rendezvous descriptor timestamps, to help
7766 handle people like blanu who don't know what time it is
7767 - normal circs are 3 hops, but some rend/intro circs are 4, if
7768 the initiator doesn't get to choose the last hop
7769 - send acks for introductions, so alice can know whether to try
7771 - bob publishes intro points more correctly
7772 o changes from 0.0.5:
7773 - fix an assert trigger that's been plaguing us since the days
7774 of 0.0.2prexx (thanks weasel!)
7775 - retry stream correctly when we fail to connect because of
7776 exit-policy-reject (should try another) or can't-resolve-address
7777 (also should try another, because dns on random internet servers
7779 - when we hup a dirserver and we've *removed* a server from the
7780 approved-routers list, now we remove that server from the
7781 in-memory directories too
7784 Changes in version 0.0.6pre2 - 2004-04-08
7785 o We fixed our base32 implementation. Now it works on all architectures.
7788 Changes in version 0.0.6pre1 - 2004-04-08
7790 - Hidden services and rendezvous points are implemented. Go to
7791 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
7792 hidden services. (This only works via a socks4a proxy such as
7793 Privoxy, and currently it's quite slow.)
7796 Changes in version 0.0.5 - 2004-03-30
7800 Changes in version 0.0.5rc3 - 2004-03-29
7801 o Install torrc as torrc.sample -- we no longer clobber your
7803 o Re-enable recommendedversion checking (we broke it in rc2, oops)
7804 o Add in a 'notice' log level for things the operator should hear
7805 but that aren't warnings
7808 Changes in version 0.0.5rc2 - 2004-03-29
7809 o Hold socks connection open until reply is flushed (if possible)
7810 o Make exit nodes resolve IPs to IPs immediately, rather than asking
7811 the dns farm to do it.
7812 o Fix c99 aliasing warnings in rephist.c
7813 o Don't include server descriptors that are older than 24 hours in the
7815 o Give socks 'reject' replies their whole 15s to attempt to flush,
7816 rather than seeing the 60s timeout and assuming the flush had failed.
7817 o Clean automake droppings from the cvs repository
7820 Changes in version 0.0.5rc1 - 2004-03-28
7821 o Fix mangled-state bug in directory fetching (was causing sigpipes).
7822 o Only build circuits after we've fetched the directory: clients were
7823 using only the directory servers before they'd fetched a directory.
7824 This also means longer startup time; so it goes.
7825 o Fix an assert trigger where an OP would fail to handshake, and we'd
7826 expect it to have a nickname.
7827 o Work around a tsocks bug: do a socks reject when AP connection dies
7828 early, else tsocks goes into an infinite loop.
7831 Changes in version 0.0.4 - 2004-03-26
7832 o When connecting to a dirserver or OR and the network is down,
7836 Changes in version 0.0.3 - 2004-03-26
7837 o Warn and fail if server chose a nickname with illegal characters
7838 o Port to Solaris and Sparc:
7839 - include missing header fcntl.h
7840 - have autoconf find -lsocket -lnsl automatically
7841 - deal with hardware word alignment
7842 - make uname() work (solaris has a different return convention)
7843 - switch from using signal() to sigaction()
7844 o Preliminary work on reputation system:
7845 - Keep statistics on success/fail of connect attempts; they're published
7846 by kill -USR1 currently.
7847 - Add a RunTesting option to try to learn link state by creating test
7848 circuits, even when SocksPort is off.
7849 - Remove unused open circuits when there are too many.
7852 Changes in version 0.0.2 - 2004-03-19
7853 - Include strlcpy and strlcat for safer string ops
7854 - define INADDR_NONE so we compile (but still not run) on solaris
7857 Changes in version 0.0.2pre27 - 2004-03-14
7859 - Allow internal tor networks (we were rejecting internal IPs,
7860 now we allow them if they're set explicitly).
7861 - And fix a few endian issues.
7864 Changes in version 0.0.2pre26 - 2004-03-14
7866 - If a stream times out after 15s without a connected cell, don't
7867 try that circuit again: try a new one.
7868 - Retry streams at most 4 times. Then give up.
7869 - When a dirserver gets a descriptor from an unknown router, it
7870 logs its fingerprint (so the dirserver operator can choose to
7871 accept it even without mail from the server operator).
7872 - Inform unapproved servers when we reject their descriptors.
7873 - Make tor build on Windows again. It works as a client, who knows
7875 - Clearer instructions in the torrc for how to set up a server.
7876 - Be more efficient about reading fd's when our global token bucket
7877 (used for rate limiting) becomes empty.
7879 - Stop asserting that computers always go forward in time. It's
7881 - When we sent a cell (e.g. destroy) and then marked an OR connection
7882 expired, we might close it before finishing a flush if the other
7883 side isn't reading right then.
7884 - Don't allow dirservers to start if they haven't defined
7886 - We were caching transient dns failures. Oops.
7887 - Prevent servers from publishing an internal IP as their address.
7888 - Address a strcat vulnerability in circuit.c
7891 Changes in version 0.0.2pre25 - 2004-03-04
7893 - Put the OR's IP in its router descriptor, not its fqdn. That way
7894 we'll stop being stalled by gethostbyname for nodes with flaky dns,
7897 - If the user typed in an address that didn't resolve, the server
7901 Changes in version 0.0.2pre24 - 2004-03-03
7903 - Fix an assertion failure in dns.c, where we were trying to dequeue
7904 a pending dns resolve even if it wasn't pending
7905 - Fix a spurious socks5 warning about still trying to write after the
7906 connection is finished.
7907 - Hold certain marked_for_close connections open until they're finished
7908 flushing, rather than losing bytes by closing them too early.
7909 - Correctly report the reason for ending a stream
7910 - Remove some duplicate calls to connection_mark_for_close
7911 - Put switch_id and start_daemon earlier in the boot sequence, so it
7912 will actually try to chdir() to options.DataDirectory
7913 - Make 'make test' exit(1) if a test fails; fix some unit tests
7914 - Make tor fail when you use a config option it doesn't know about,
7915 rather than warn and continue.
7916 - Make --version work
7917 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
7920 Changes in version 0.0.2pre23 - 2004-02-29
7922 - Print a statement when the first circ is finished, so the user
7924 - If a relay cell is unrecognized at the end of the circuit,
7925 send back a destroy. (So attacks to mutate cells are more
7927 - New config option 'excludenodes' to avoid certain nodes for circuits.
7928 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
7929 so you can collect coredumps there.
7931 - Fix a bug in tls flushing where sometimes data got wedged and
7932 didn't flush until more data got sent. Hopefully this bug was
7933 a big factor in the random delays we were seeing.
7934 - Make 'connected' cells include the resolved IP, so the client
7935 dns cache actually gets populated.
7936 - Disallow changing from ORPort=0 to ORPort>0 on hup.
7937 - When we time-out on a stream and detach from the circuit, send an
7938 end cell down it first.
7939 - Only warn about an unknown router (in exitnodes, entrynodes,
7940 excludenodes) after we've fetched a directory.
7943 Changes in version 0.0.2pre22 - 2004-02-26
7945 - Servers publish less revealing uname information in descriptors.
7946 - More memory tracking and assertions, to crash more usefully when
7948 - If the default torrc isn't there, just use some default defaults.
7949 Plus provide an internal dirservers file if they don't have one.
7950 - When the user tries to use Tor as an http proxy, give them an http
7951 501 failure explaining that we're a socks proxy.
7952 - Dump a new router.desc on hup, to help confused people who change
7953 their exit policies and then wonder why router.desc doesn't reflect
7955 - Clean up the generic tor.sh init script that we ship with.
7957 - If the exit stream is pending on the resolve, and a destroy arrives,
7958 then the stream wasn't getting removed from the pending list. I
7959 think this was the one causing recent server crashes.
7960 - Use a more robust poll on OSX 10.3, since their poll is flaky.
7961 - When it couldn't resolve any dirservers, it was useless from then on.
7962 Now it reloads the RouterFile (or default dirservers) if it has no
7964 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
7965 many users don't even *have* a /usr/local/sbin/.
7968 Changes in version 0.0.2pre21 - 2004-02-18
7970 - There's a ChangeLog file that actually reflects the changelog.
7971 - There's a 'torify' wrapper script, with an accompanying
7972 tor-tsocks.conf, that simplifies the process of using tsocks for
7973 tor. It even has a man page.
7974 - The tor binary gets installed to sbin rather than bin now.
7975 - Retry streams where the connected cell hasn't arrived in 15 seconds
7976 - Clean up exit policy handling -- get the default out of the torrc,
7977 so we can update it without forcing each server operator to fix
7979 - Allow imaps and pop3s in default exit policy
7981 - Prevent picking middleman nodes as the last node in the circuit
7984 Changes in version 0.0.2pre20 - 2004-01-30
7986 - We now have a deb package, and it's in debian unstable. Go to
7988 - I've split the TotalBandwidth option into BandwidthRate (how many
7989 bytes per second you want to allow, long-term) and
7990 BandwidthBurst (how many bytes you will allow at once before the cap
7991 kicks in). This better token bucket approach lets you, say, set
7992 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
7993 performance while not exceeding your monthly bandwidth quota.
7994 - Push out a tls record's worth of data once you've got it, rather
7995 than waiting until you've read everything waiting to be read. This
7996 may improve performance by pipelining better. We'll see.
7997 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
7998 from failed circuits (if they haven't been connected yet) and attach
8000 - Expire old streams that haven't managed to connect. Some day we'll
8001 have them reattach to new circuits instead.
8004 - Fix several memory leaks that were causing servers to become bloated
8006 - Fix a few very rare assert triggers. A few more remain.
8007 - Setuid to User _before_ complaining about running as root.
8010 Changes in version 0.0.2pre19 - 2004-01-07
8012 - Fix deadlock condition in dns farm. We were telling a child to die by
8013 closing the parent's file descriptor to him. But newer children were
8014 inheriting the open file descriptor from the parent, and since they
8015 weren't closing it, the socket never closed, so the child never read
8016 eof, so he never knew to exit. Similarly, dns workers were holding
8017 open other sockets, leading to all sorts of chaos.
8018 - New cleaner daemon() code for forking and backgrounding.
8019 - If you log to a file, it now prints an entry at the top of the
8020 logfile so you know it's working.
8021 - The onionskin challenge length was 30 bytes longer than necessary.
8022 - Started to patch up the spec so it's not quite so out of date.
8025 Changes in version 0.0.2pre18 - 2004-01-02
8027 - Fix endian issues with the 'integrity' field in the relay header.
8028 - Fix a potential bug where connections in state
8029 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
8032 Changes in version 0.0.2pre17 - 2003-12-30
8034 - Made --debuglogfile (or any second log file, actually) work.
8035 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
8036 adversary could force us into an infinite loop.
8039 - Each onionskin handshake now includes a hash of the computed key,
8040 to prove the server's identity and help perfect forward secrecy.
8041 - Changed cell size from 256 to 512 bytes (working toward compatibility
8043 - Changed cell length to 2 bytes, and moved it to the relay header.
8044 - Implemented end-to-end integrity checking for the payloads of
8046 - Separated streamid from 'recognized' (otherwise circuits will get
8047 messed up when we try to have streams exit from the middle). We
8048 use the integrity-checking to confirm that a cell is addressed to
8050 - Randomize the initial circid and streamid values, so an adversary who
8051 breaks into a node can't learn how many circuits or streams have
8055 Changes in version 0.0.2pre16 - 2003-12-14
8057 - Fixed a bug that made HUP trigger an assert
8058 - Fixed a bug where a circuit that immediately failed wasn't being
8059 counted as a failed circuit in counting retries.
8062 - Now we close the circuit when we get a truncated cell: otherwise we're
8063 open to an anonymity attack where a bad node in the path truncates
8064 the circuit and then we open streams at him.
8065 - Add port ranges to exit policies
8066 - Add a conservative default exit policy
8067 - Warn if you're running tor as root
8068 - on HUP, retry OR connections and close/rebind listeners
8069 - options.EntryNodes: try these nodes first when picking the first node
8070 - options.ExitNodes: if your best choices happen to include any of
8071 your preferred exit nodes, you choose among just those preferred
8073 - options.ExcludedNodes: nodes that are never picked in path building
8076 Changes in version 0.0.2pre15 - 2003-12-03
8077 o Robustness and bugfixes:
8078 - Sometimes clients would cache incorrect DNS resolves, which would
8079 really screw things up.
8080 - An OP that goes offline would slowly leak all its sockets and stop
8082 - A wide variety of bugfixes in exit node selection, exit policy
8083 handling, and processing pending streams when a new circuit is
8085 - Pick nodes for a path only from those the directory says are up
8086 - Choose randomly from all running dirservers, not always the first one
8087 - Increase allowed http header size for directory fetch.
8088 - Stop writing to stderr (if we're daemonized it will be closed).
8089 - Enable -g always, so cores will be more useful to me.
8090 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
8093 - Wrote a man page. It lists commonly used options.
8096 - Change default loglevel to warn.
8097 - Make PidFile default to null rather than littering in your CWD.
8098 - OnionRouter config option is now obsolete. Instead it just checks
8100 - Moved to a single unified torrc file for both clients and servers.
8103 Changes in version 0.0.2pre14 - 2003-11-29
8104 o Robustness and bugfixes:
8105 - Force the admin to make the DataDirectory himself
8106 - to get ownership/permissions right
8107 - so clients no longer make a DataDirectory and then never use it
8108 - fix bug where a client who was offline for 45 minutes would never
8109 pull down a directory again
8110 - fix (or at least hide really well) the dns assert bug that was
8111 causing server crashes
8112 - warnings and improved robustness wrt clockskew for certs
8113 - use the native daemon(3) to daemonize, when available
8114 - exit if bind() fails
8115 - exit if neither socksport nor orport is defined
8116 - include our own tor_timegm (Win32 doesn't have its own)
8117 - bugfix for win32 with lots of connections
8118 - fix minor bias in PRNG
8119 - make dirserver more robust to corrupt cached directory
8122 - Wrote the design document (woo)
8124 o Circuit building and exit policies:
8125 - Circuits no longer try to use nodes that the directory has told them
8127 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
8128 bitcounts (18.0.0.0/8).
8129 - Make AP connections standby for a circuit if no suitable circuit
8130 exists, rather than failing
8131 - Circuits choose exit node based on addr/port, exit policies, and
8132 which AP connections are standing by
8133 - Bump min pathlen from 2 to 3
8134 - Relay end cells have a payload to describe why the stream ended.
8135 - If the stream failed because of exit policy, try again with a new
8137 - Clients have a dns cache to remember resolved addresses.
8138 - Notice more quickly when we have no working circuits
8141 - APPort is now called SocksPort
8142 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
8144 - RecommendedVersions is now a config variable rather than
8145 hardcoded (for dirservers)
8146 - Reloads config on HUP
8147 - Usage info on -h or --help
8148 - If you set User and Group config vars, it'll setu/gid to them.
8151 Changes in version 0.0.2pre13 - 2003-10-19
8152 o General stability:
8153 - SSL_write no longer fails when it returns WANTWRITE and the number
8154 of bytes in the buf has changed by the next SSL_write call.
8155 - Fix segfault fetching directory when network is down
8156 - Fix a variety of minor memory leaks
8157 - Dirservers reload the fingerprints file on HUP, so I don't have
8158 to take down the network when I approve a new router
8159 - Default server config file has explicit Address line to specify fqdn
8162 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
8163 - Make listener connections not ever alloc bufs
8165 o Autoconf improvements:
8166 - don't clobber an external CFLAGS in ./configure
8167 - Make install now works
8168 - create var/lib/tor on make install
8169 - autocreate a tor.sh initscript to help distribs
8170 - autocreate the torrc and sample-server-torrc with correct paths
8172 o Log files and Daemonizing now work:
8173 - If --DebugLogFile is specified, log to it at -l debug
8174 - If --LogFile is specified, use it instead of commandline
8175 - If --RunAsDaemon is set, tor forks and backgrounds on startup