1 Changes in version 0.2.1.17-?? - 2009-??-??
3 - Serve the DirPortFrontPage page even when we have been approaching
4 our quotas recently. Fixes bug 1013; bugfix on 0.2.1.8-alpha.
7 - Clients now use the bandwidth values in the consensus, rather than
8 the bandwidth values in each relay descriptor. This approach opens
9 the door to more accurate bandwidth estimates once the directory
10 authorities start doing active measurements. Implements more of
14 Changes in version 0.2.1.16-rc - 2009-06-20
16 - Fix an edge case where a malicious exit relay could convince a
17 controller that the client's DNS question resolves to an internal IP
18 address. Bug found and fixed by "optimist"; bugfix on 0.1.2.8-beta.
20 o Major performance improvements (on 0.2.0.x):
21 - Disable and refactor some debugging checks that forced a linear scan
22 over the whole server-side DNS cache. These accounted for over 50%
23 of CPU time on a relatively busy exit node's gprof profile. Found
25 - Disable some debugging checks that appeared in exit node profile
29 - Update to the "June 3 2009" ip-to-country file.
30 - Do not have tor-resolve automatically refuse all .onion addresses;
31 if AutomapHostsOnResolve is set in your torrc, this will work fine.
33 o Minor bugfixes (on 0.2.0.x):
34 - Log correct error messages for DNS-related network errors on
36 - Fix a race condition that could cause crashes or memory corruption
37 when running as a server with a controller listening for log
39 - Avoid crashing when we have a policy specified in a DirPolicy or
40 SocksPolicy or ReachableAddresses option with ports set on it,
41 and we re-load the policy. May fix bug 996.
42 - Hidden service clients didn't use a cached service descriptor that
43 was older than 15 minutes, but wouldn't fetch a new one either,
44 because there was already one in the cache. Now, fetch a v2
45 descriptor unless the same descriptor was added to the cache within
46 the last 15 minutes. Fixes bug 997; reported by Marcus Griep.
48 o Minor bugfixes (on 0.2.1.x):
49 - Don't warn users about low port and hibernation mix when they
50 provide a *ListenAddress directive to fix that. Bugfix on
52 - When switching back and forth between bridge mode, do not start
53 gathering GeoIP data until two hours have passed.
54 - Do not complain that the user has requested an excluded node as
55 an exit when the node is not really an exit. This could happen
56 because the circuit was for testing, or an introduction point.
60 Changes in version 0.2.1.15-rc - 2009-05-25
61 o Major bugfixes (on 0.2.0.x):
62 - Fix a timing-dependent, allocator-dependent, DNS-related crash bug
63 that would occur on some exit nodes when DNS failures and timeouts
64 occurred in certain patterns. Fix for bug 957.
66 o Minor bugfixes (on 0.2.0.x):
67 - Actually return -1 in the error case for read_bandwidth_usage().
68 Harmless bug, since we currently don't care about the return value
69 anywhere. Bugfix on 0.2.0.9-alpha.
70 - Provide a more useful log message if bug 977 (related to buffer
71 freelists) ever reappears, and do not crash right away.
72 - Fix an assertion failure on 64-bit platforms when we allocated
73 memory right up to the end of a memarea, then realigned the memory
74 one step beyond the end. Fixes a possible cause of bug 930.
75 - Protect the count of open sockets with a mutex, so we can't
76 corrupt it when two threads are closing or opening sockets at once.
77 Fix for bug 939. Bugfix on 0.2.0.1-alpha.
78 - Don't allow a bridge to publish its router descriptor to a
79 non-bridge directory authority. Fixes part of bug 932.
80 - When we change to or from being a bridge, reset our counts of
81 client usage by country. Fixes bug 932.
82 - Fix a bug that made stream bandwidth get misreported to the
84 - Stop using malloc_usable_size() to use more area than we had
85 actually allocated: it was safe, but made valgrind really unhappy.
86 - Fix a memory leak when v3 directory authorities load their keys
87 and cert from disk. Bugfix on 0.2.0.1-alpha.
89 o Minor bugfixes (on 0.2.1.x):
90 - Fix use of freed memory when deciding to mark a non-addable
91 descriptor as never-downloadable. Bugfix on 0.2.1.9-alpha.
94 Changes in version 0.2.1.14-rc - 2009-04-12
95 Tor 0.2.1.14-rc marks the first release candidate for the 0.2.1.x
96 series. It begins fixing some major performance problems, and also
97 finally addresses the bug that was causing relays on dynamic IP
98 addresses to fall out of the directory.
101 - Clients replace entry guards that were chosen more than a few months
102 ago. This change should significantly improve client performance,
103 especially once more people upgrade, since relays that have been
104 a guard for a long time are currently overloaded.
106 o Major bugfixes (on 0.2.0):
107 - Finally fix the bug where dynamic-IP relays disappear when their
108 IP address changes: directory mirrors were mistakenly telling
109 them their old address if they asked via begin_dir, so they
110 never got an accurate answer about their new address, so they
111 just vanished after a day. For belt-and-suspenders, relays that
112 don't set Address in their config now avoid using begin_dir for
113 all direct connections. Should fix bugs 827, 883, and 900.
114 - Relays were falling out of the networkstatus consensus for
115 part of a day if they changed their local config but the
116 authorities discarded their new descriptor as "not sufficiently
117 different". Now directory authorities accept a descriptor as changed
118 if bandwidthrate or bandwidthburst changed. Partial fix for bug 962;
120 - Avoid crashing in the presence of certain malformed descriptors.
121 Found by lark, and by automated fuzzing.
124 - When generating circuit events with verbose nicknames for
125 controllers, try harder to look up nicknames for routers on a
126 circuit. (Previously, we would look in the router descriptors we had
127 for nicknames, but not in the consensus.) Partial fix for bug 941.
128 - If the bridge config line doesn't specify a port, assume 443.
129 This makes bridge lines a bit smaller and easier for users to
131 - Raise the minimum bandwidth to be a relay from 20000 bytes to 20480
132 bytes (aka 20KB/s), to match our documentation. Also update
133 directory authorities so they always assign the Fast flag to relays
134 with 20KB/s of capacity. Now people running relays won't suddenly
135 find themselves not seeing any use, if the network gets faster
137 - Update to the "April 3 2009" ip-to-country file.
140 - Avoid trying to print raw memory to the logs when we decide to
141 give up on downloading a given relay descriptor. Bugfix on
143 - In tor-resolve, when the Tor client to use is specified by
144 <hostname>:<port>, actually use the specified port rather than
145 defaulting to 9050. Bugfix on 0.2.1.6-alpha.
146 - Make directory usage recording work again. Bugfix on 0.2.1.6-alpha.
147 - When starting with a cache over a few days old, do not leak
148 memory for the obsolete router descriptors in it. Bugfix on
150 - Avoid double-free on list of successfully uploaded hidden
151 service discriptors. Fix for bug 948. Bugfix on 0.2.1.6-alpha.
152 - Change memarea_strndup() implementation to work even when
153 duplicating a string at the end of a page. This bug was
154 harmless for now, but could have meant crashes later. Fix by
155 lark. Bugfix on 0.2.1.1-alpha.
156 - Limit uploaded directory documents to be 16M rather than 500K.
157 The directory authorities were refusing v3 consensus votes from
158 other authorities, since the votes are now 504K. Fixes bug 959;
159 bugfix on 0.0.2pre17 (where we raised it from 50K to 500K ;).
160 - Directory authorities should never send a 503 "busy" response to
161 requests for votes or keys. Bugfix on 0.2.0.8-alpha; exposed by
165 Changes in version 0.2.1.13-alpha - 2009-03-09
166 Tor 0.2.1.13-alpha includes another big pile of minor bugfixes and
167 cleanups. We're finally getting close to a release candidate.
170 - Correctly update the list of which countries we exclude as
171 exits, when the GeoIP file is loaded or reloaded. Diagnosed by
172 lark. Bugfix on 0.2.1.6-alpha.
174 o Minor bugfixes (on 0.2.0.x and earlier):
175 - Automatically detect MacOSX versions earlier than 10.4.0, and
176 disable kqueue from inside Tor when running with these versions.
177 We previously did this from the startup script, but that was no
178 help to people who didn't use the startup script. Resolves bug 863.
179 - When we had picked an exit node for a connection, but marked it as
180 "optional", and it turned out we had no onion key for the exit,
181 stop wanting that exit and try again. This situation may not
182 be possible now, but will probably become feasible with proposal
183 158. Spotted by rovv. Fixes another case of bug 752.
184 - Clients no longer cache certificates for authorities they do not
185 recognize. Bugfix on 0.2.0.9-alpha.
186 - When we can't transmit a DNS request due to a network error, retry
187 it after a while, and eventually transmit a failing response to
188 the RESOLVED cell. Bugfix on 0.1.2.5-alpha.
189 - If the controller claimed responsibility for a stream, but that
190 stream never finished making its connection, it would live
191 forever in circuit_wait state. Now we close it after SocksTimeout
192 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
193 - Drop begin cells to a hidden service if they come from the middle
194 of a circuit. Patch from lark.
195 - When we erroneously receive two EXTEND cells for the same circuit
196 ID on the same connection, drop the second. Patch from lark.
197 - Fix a crash that occurs on exit nodes when a nameserver request
198 timed out. Bugfix on 0.1.2.1-alpha; our CLEAR debugging code had
199 been suppressing the bug since 0.1.2.10-alpha. Partial fix for
201 - Do not assume that a stack-allocated character array will be
202 64-bit aligned on platforms that demand that uint64_t access is
203 aligned. Possible fix for bug 604.
204 - Parse dates and IPv4 addresses in a locale- and libc-independent
205 manner, to avoid platform-dependent behavior on malformed input.
206 - Build correctly when configured to build outside the main source
207 path. Patch from Michael Gold.
208 - We were already rejecting relay begin cells with destination port
209 of 0. Now also reject extend cells with destination port or address
210 of 0. Suggested by lark.
212 o Minor bugfixes (on 0.2.1.x):
213 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
214 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
215 - If we're an exit node, scrub the IP address to which we are exiting
216 in the logs. Bugfix on 0.2.1.8-alpha.
219 - On Linux, use the prctl call to re-enable core dumps when the user
221 - New controller event NEWCONSENSUS that lists the networkstatus
222 lines for every recommended relay. Now controllers like Torflow
223 can keep up-to-date on which relays they should be using.
224 - Update to the "February 26 2009" ip-to-country file.
227 Changes in version 0.2.0.34 - 2009-02-08
228 Tor 0.2.0.34 features several more security-related fixes. You should
229 upgrade, especially if you run an exit relay (remote crash) or a
230 directory authority (remote infinite loop), or you're on an older
231 (pre-XP) or not-recently-patched Windows (remote exploit).
233 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
234 have many known flaws, and nobody should be using them. You should
235 upgrade. If you're using a Linux or BSD and its packages are obsolete,
236 stop using those packages and upgrade anyway.
239 - Fix an infinite-loop bug on handling corrupt votes under certain
240 circumstances. Bugfix on 0.2.0.8-alpha.
241 - Fix a temporary DoS vulnerability that could be performed by
242 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
243 - Avoid a potential crash on exit nodes when processing malformed
244 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
245 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
246 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
249 - Fix compilation on systems where time_t is a 64-bit integer.
250 Patch from Matthias Drochner.
251 - Don't consider expiring already-closed client connections. Fixes
252 bug 893. Bugfix on 0.0.2pre20.
255 Changes in version 0.2.1.12-alpha - 2009-02-08
256 Tor 0.2.1.12-alpha features several more security-related fixes. You
257 should upgrade, especially if you run an exit relay (remote crash) or
258 a directory authority (remote infinite loop), or you're on an older
259 (pre-XP) or not-recently-patched Windows (remote exploit). It also
260 includes a big pile of minor bugfixes and cleanups.
263 - Fix an infinite-loop bug on handling corrupt votes under certain
264 circumstances. Bugfix on 0.2.0.8-alpha.
265 - Fix a temporary DoS vulnerability that could be performed by
266 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
267 - Avoid a potential crash on exit nodes when processing malformed
268 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
271 - Let controllers actually ask for the "clients_seen" event for
272 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
273 reported by Matt Edman.
274 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
276 - Fix a bug in address parsing that was preventing bridges or hidden
277 service targets from being at IPv6 addresses.
278 - Solve a bug that kept hardware crypto acceleration from getting
279 enabled when accounting was turned on. Fixes bug 907. Bugfix on
281 - Remove a bash-ism from configure.in to build properly on non-Linux
282 platforms. Bugfix on 0.2.1.1-alpha.
283 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
284 headers. Bugfix on 0.2.0.10-alpha.
285 - Don't consider expiring already-closed client connections. Fixes
286 bug 893. Bugfix on 0.0.2pre20.
287 - Fix another interesting corner-case of bug 891 spotted by rovv:
288 Previously, if two hosts had different amounts of clock drift, and
289 one of them created a new connection with just the wrong timing,
290 the other might decide to deprecate the new connection erroneously.
291 Bugfix on 0.1.1.13-alpha.
292 - Resolve a very rare crash bug that could occur when the user forced
293 a nameserver reconfiguration during the middle of a nameserver
294 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
295 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
296 Bugfix on 0.2.1.7-alpha.
297 - If we're using bridges and our network goes away, be more willing
298 to forgive our bridges and try again when we get an application
299 request. Bugfix on 0.2.0.x.
302 - Support platforms where time_t is 64 bits long. (Congratulations,
303 NetBSD!) Patch from Matthias Drochner.
304 - Add a 'getinfo status/clients-seen' controller command, in case
305 controllers want to hear clients_seen events but connect late.
308 - Disable GCC's strict alias optimization by default, to avoid the
309 likelihood of its introducing subtle bugs whenever our code violates
310 the letter of C99's alias rules.
313 Changes in version 0.2.0.33 - 2009-01-21
314 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
315 useful to users. It also finally fixes a bug where a relay or client
316 that's been off for many days would take a long time to bootstrap.
318 This update also fixes an important security-related bug reported by
319 Ilja van Sprundel. You should upgrade. (We'll send out more details
320 about the bug once people have had some time to upgrade.)
323 - Fix a heap-corruption bug that may be remotely triggerable on
324 some platforms. Reported by Ilja van Sprundel.
327 - When a stream at an exit relay is in state "resolving" or
328 "connecting" and it receives an "end" relay cell, the exit relay
329 would silently ignore the end cell and not close the stream. If
330 the client never closes the circuit, then the exit relay never
331 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
333 - When sending CREATED cells back for a given circuit, use a 64-bit
334 connection ID to find the right connection, rather than an addr:port
335 combination. Now that we can have multiple OR connections between
336 the same ORs, it is no longer possible to use addr:port to uniquely
337 identify a connection.
338 - Bridge relays that had DirPort set to 0 would stop fetching
339 descriptors shortly after startup, and then briefly resume
340 after a new bandwidth test and/or after publishing a new bridge
341 descriptor. Bridge users that try to bootstrap from them would
342 get a recent networkstatus but would get descriptors from up to
343 18 hours earlier, meaning most of the descriptors were obsolete
344 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
345 - Prevent bridge relays from serving their 'extrainfo' document
346 to anybody who asks, now that extrainfo docs include potentially
347 sensitive aggregated client geoip summaries. Bugfix on
349 - If the cached networkstatus consensus is more than five days old,
350 discard it rather than trying to use it. In theory it could be
351 useful because it lists alternate directory mirrors, but in practice
352 it just means we spend many minutes trying directory mirrors that
353 are long gone from the network. Also discard router descriptors as
354 we load them if they are more than five days old, since the onion
355 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
358 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
359 could make gcc generate non-functional binary search code. Bugfix
361 - Build correctly on platforms without socklen_t.
362 - Compile without warnings on solaris.
363 - Avoid potential crash on internal error during signature collection.
364 Fixes bug 864. Patch from rovv.
365 - Correct handling of possible malformed authority signing key
366 certificates with internal signature types. Fixes bug 880.
367 Bugfix on 0.2.0.3-alpha.
368 - Fix a hard-to-trigger resource leak when logging credential status.
370 - When we can't initialize DNS because the network is down, do not
371 automatically stop Tor from starting. Instead, we retry failed
372 dns_init() every 10 minutes, and change the exit policy to reject
373 *:* until one succeeds. Fixes bug 691.
374 - Use 64 bits instead of 32 bits for connection identifiers used with
375 the controller protocol, to greatly reduce risk of identifier reuse.
376 - When we're choosing an exit node for a circuit, and we have
377 no pending streams, choose a good general exit rather than one that
378 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
379 - Fix another case of assuming, when a specific exit is requested,
380 that we know more than the user about what hosts it allows.
381 Fixes one case of bug 752. Patch from rovv.
382 - Clip the MaxCircuitDirtiness config option to a minimum of 10
383 seconds. Warn the user if lower values are given in the
384 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
385 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
386 user if lower values are given in the configuration. Bugfix on
387 0.1.1.17-rc. Patch by Sebastian.
388 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
389 the cache because we already had a v0 descriptor with the same ID.
390 Bugfix on 0.2.0.18-alpha.
391 - Fix a race condition when freeing keys shared between main thread
392 and CPU workers that could result in a memory leak. Bugfix on
393 0.1.0.1-rc. Fixes bug 889.
394 - Send a valid END cell back when a client tries to connect to a
395 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
396 840. Patch from rovv.
397 - Check which hops rendezvous stream cells are associated with to
398 prevent possible guess-the-streamid injection attacks from
399 intermediate hops. Fixes another case of bug 446. Based on patch
401 - If a broken client asks a non-exit router to connect somewhere,
402 do not even do the DNS lookup before rejecting the connection.
403 Fixes another case of bug 619. Patch from rovv.
404 - When a relay gets a create cell it can't decrypt (e.g. because it's
405 using the wrong onion key), we were dropping it and letting the
406 client time out. Now actually answer with a destroy cell. Fixes
407 bug 904. Bugfix on 0.0.2pre8.
409 o Minor bugfixes (hidden services):
410 - Do not throw away existing introduction points on SIGHUP. Bugfix on
411 0.0.6pre1. Patch by Karsten. Fixes bug 874.
414 - Report the case where all signatures in a detached set are rejected
415 differently than the case where there is an error handling the
417 - When we realize that another process has modified our cached
418 descriptors, print out a more useful error message rather than
419 triggering an assertion. Fixes bug 885. Patch from Karsten.
420 - Implement the 0x20 hack to better resist DNS poisoning: set the
421 case on outgoing DNS requests randomly, and reject responses that do
422 not match the case correctly. This logic can be disabled with the
423 ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
424 of servers that do not reliably preserve case in replies. See
425 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
427 - Check DNS replies for more matching fields to better resist DNS
429 - Never use OpenSSL compression: it wastes RAM and CPU trying to
430 compress cells, which are basically all encrypted, compressed, or
434 Changes in version 0.2.1.11-alpha - 2009-01-20
435 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
436 week it will take a long time to bootstrap again" bug. It also fixes
437 an important security-related bug reported by Ilja van Sprundel. You
438 should upgrade. (We'll send out more details about the bug once people
439 have had some time to upgrade.)
442 - Fix a heap-corruption bug that may be remotely triggerable on
443 some platforms. Reported by Ilja van Sprundel.
446 - Discard router descriptors as we load them if they are more than
447 five days old. Otherwise if Tor is off for a long time and then
448 starts with cached descriptors, it will try to use the onion
449 keys in those obsolete descriptors when building circuits. Bugfix
450 on 0.2.0.x. Fixes bug 887.
453 - Try to make sure that the version of Libevent we're running with
454 is binary-compatible with the one we built with. May address bug
456 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
457 for bug 905. Bugfix on 0.2.1.7-alpha.
458 - Add a new --enable-local-appdata configuration switch to change
459 the default location of the datadir on win32 from APPDATA to
460 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
461 entirely. Patch from coderman.
464 - Make outbound DNS packets respect the OutboundBindAddress setting.
465 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
466 - When our circuit fails at the first hop (e.g. we get a destroy
467 cell back), avoid using that OR connection anymore, and also
468 tell all the one-hop directory requests waiting for it that they
469 should fail. Bugfix on 0.2.1.3-alpha.
470 - In the torify(1) manpage, mention that tsocks will leak your
474 Changes in version 0.2.1.10-alpha - 2009-01-06
475 Tor 0.2.1.10-alpha fixes two major bugs in bridge relays (one that
476 would make the bridge relay not so useful if it had DirPort set to 0,
477 and one that could let an attacker learn a little bit of information
478 about the bridge's users), and a bug that would cause your Tor relay
479 to ignore a circuit create request it can't decrypt (rather than reply
480 with an error). It also fixes a wide variety of other bugs.
483 - If the cached networkstatus consensus is more than five days old,
484 discard it rather than trying to use it. In theory it could
485 be useful because it lists alternate directory mirrors, but in
486 practice it just means we spend many minutes trying directory
487 mirrors that are long gone from the network. Helps bug 887 a bit;
489 - Bridge relays that had DirPort set to 0 would stop fetching
490 descriptors shortly after startup, and then briefly resume
491 after a new bandwidth test and/or after publishing a new bridge
492 descriptor. Bridge users that try to bootstrap from them would
493 get a recent networkstatus but would get descriptors from up to
494 18 hours earlier, meaning most of the descriptors were obsolete
495 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
496 - Prevent bridge relays from serving their 'extrainfo' document
497 to anybody who asks, now that extrainfo docs include potentially
498 sensitive aggregated client geoip summaries. Bugfix on
502 - New controller event "clients_seen" to report a geoip-based summary
503 of which countries we've seen clients from recently. Now controllers
504 like Vidalia can show bridge operators that they're actually making
506 - Build correctly against versions of OpenSSL 0.9.8 or later built
507 without support for deprecated functions.
508 - Update to the "December 19 2008" ip-to-country file.
510 o Minor bugfixes (on 0.2.0.x):
511 - Authorities now vote for the Stable flag for any router whose
512 weighted MTBF is at least 5 days, regardless of the mean MTBF.
513 - Do not remove routers as too old if we do not have any consensus
514 document. Bugfix on 0.2.0.7-alpha.
515 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
516 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
517 - When an exit relay resolves a stream address to a local IP address,
518 do not just keep retrying that same exit relay over and
519 over. Instead, just close the stream. Addresses bug 872. Bugfix
520 on 0.2.0.32. Patch from rovv.
521 - If a hidden service sends us an END cell, do not consider
522 retrying the connection; just close it. Patch from rovv.
523 - When we made bridge authorities stop serving bridge descriptors over
524 unencrypted links, we also broke DirPort reachability testing for
525 bridges. So bridges with a non-zero DirPort were printing spurious
526 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
527 - When a relay gets a create cell it can't decrypt (e.g. because it's
528 using the wrong onion key), we were dropping it and letting the
529 client time out. Now actually answer with a destroy cell. Fixes
530 bug 904. Bugfix on 0.0.2pre8.
531 - Squeeze 2-5% out of client performance (according to oprofile) by
532 improving the implementation of some policy-manipulation functions.
534 o Minor bugfixes (on 0.2.1.x):
535 - Make get_interface_address() function work properly again; stop
536 guessing the wrong parts of our address as our address.
537 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
538 send on that circuit. Otherwise we might violate the proposal-110
539 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
541 - When we're sending non-EXTEND cells to the first hop in a circuit,
542 for example to use an encrypted directory connection, we don't need
543 to use RELAY_EARLY cells: the first hop knows what kind of cell
544 it is, and nobody else can even see the cell type. Conserving
545 RELAY_EARLY cells makes it easier to cannibalize circuits like
547 - Stop logging nameserver addresses in reverse order.
548 - If we are retrying a directory download slowly over and over, do
549 not automatically give up after the 254th failure. Bugfix on
551 - Resume reporting accurate "stream end" reasons to the local control
552 port. They were lost in the changes for Proposal 148. Bugfix on
555 o Deprecated and removed features:
556 - The old "tor --version --version" command, which would print out
557 the subversion "Id" of most of the source files, is now removed. It
558 turned out to be less useful than we'd expected, and harder to
561 o Code simplifications and refactoring:
562 - Change our header file guard macros to be less likely to conflict
563 with system headers. Adam Langley noticed that we were conflicting
564 with log.h on Android.
565 - Tool-assisted documentation cleanup. Nearly every function or
566 static variable in Tor should have its own documentation now.
569 Changes in version 0.2.1.9-alpha - 2008-12-25
570 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
572 o New directory authorities:
573 - gabelmoo (the authority run by Karsten Loesing) now has a new
577 - Never use a connection with a mismatched address to extend a
578 circuit, unless that connection is canonical. A canonical
579 connection is one whose address is authenticated by the router's
580 identity key, either in a NETINFO cell or in a router descriptor.
581 - Avoid a possible memory corruption bug when receiving hidden service
582 descriptors. Bugfix on 0.2.1.6-alpha.
585 - Fix a logic error that would automatically reject all but the first
586 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
587 part of bug 813/868. Bug spotted by coderman.
588 - When a stream at an exit relay is in state "resolving" or
589 "connecting" and it receives an "end" relay cell, the exit relay
590 would silently ignore the end cell and not close the stream. If
591 the client never closes the circuit, then the exit relay never
592 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
594 - When we can't initialize DNS because the network is down, do not
595 automatically stop Tor from starting. Instead, retry failed
596 dns_init() every 10 minutes, and change the exit policy to reject
597 *:* until one succeeds. Fixes bug 691.
600 - Give a better error message when an overzealous init script says
601 "sudo -u username tor --user username". Makes Bug 882 easier for
603 - When a directory authority gives us a new guess for our IP address,
604 log which authority we used. Hopefully this will help us debug
605 the recent complaints about bad IP address guesses.
606 - Detect svn revision properly when we're using git-svn.
607 - Try not to open more than one descriptor-downloading connection
608 to an authority at once. This should reduce load on directory
609 authorities. Fixes bug 366.
610 - Add cross-certification to newly generated certificates, so that
611 a signing key is enough information to look up a certificate.
612 Partial implementation of proposal 157.
613 - Start serving certificates by <identity digest, signing key digest>
614 pairs. Partial implementation of proposal 157.
615 - Clients now never report any stream end reason except 'MISC'.
616 Implements proposal 148.
617 - On platforms with a maximum syslog string length, truncate syslog
618 messages to that length ourselves, rather than relying on the
619 system to do it for us.
620 - Optimize out calls to time(NULL) that occur for every IO operation,
621 or for every cell. On systems where time() is a slow syscall,
622 this fix will be slightly helpful.
623 - Exit servers can now answer resolve requests for ip6.arpa addresses.
624 - When we download a descriptor that we then immediately (as
625 a directory authority) reject, do not retry downloading it right
626 away. Should save some bandwidth on authorities. Fix for bug
627 888. Patch by Sebastian Hahn.
628 - When a download gets us zero good descriptors, do not notify
629 Tor that new directory information has arrived.
630 - Avoid some nasty corner cases in the logic for marking connections
631 as too old or obsolete or noncanonical for circuits. Partial
634 o Minor features (controller):
635 - New CONSENSUS_ARRIVED event to note when a new consensus has
636 been fetched and validated.
637 - When we realize that another process has modified our cached
638 descriptors file, print out a more useful error message rather
639 than triggering an assertion. Fixes bug 885. Patch from Karsten.
640 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
641 controllers to prevent SIGHUP from reloading the
642 configuration. Fixes bug 856.
645 - Resume using the correct "REASON=" stream when telling the
646 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
647 - When a canonical connection appears later in our internal list
648 than a noncanonical one for a given OR ID, always use the
649 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
651 - Clip the MaxCircuitDirtiness config option to a minimum of 10
652 seconds. Warn the user if lower values are given in the
653 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
654 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
655 user if lower values are given in the configuration. Bugfix on
656 0.1.1.17-rc. Patch by Sebastian.
657 - Fix a race condition when freeing keys shared between main thread
658 and CPU workers that could result in a memory leak. Bugfix on
659 0.1.0.1-rc. Fixes bug 889.
661 o Minor bugfixes (hidden services):
662 - Do not throw away existing introduction points on SIGHUP (bugfix on
663 0.0.6pre1); also, do not stall hidden services because we're
664 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
665 by John Brooks. Patch by Karsten. Fixes bug 874.
666 - Fix a memory leak when we decline to add a v2 rendezvous
667 descriptor to the cache because we already had a v0 descriptor
668 with the same ID. Bugfix on 0.2.0.18-alpha.
670 o Deprecated and removed features:
671 - RedirectExits has been removed. It was deprecated since
673 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
674 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
675 - Cell pools are now always enabled; --disable-cell-pools is ignored.
677 o Code simplifications and refactoring:
678 - Rename the confusing or_is_obsolete field to the more appropriate
679 is_bad_for_new_circs, and move it to or_connection_t where it
681 - Move edge-only flags from connection_t to edge_connection_t: not
682 only is this better coding, but on machines of plausible alignment,
683 it should save 4-8 bytes per connection_t. "Every little bit helps."
684 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
685 for consistency; keep old option working for backward compatibility.
686 - Simplify the code for finding connections to use for a circuit.
689 Changes in version 0.2.1.8-alpha - 2008-12-08
690 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
691 builds better on unusual platforms like Solaris and old OS X, and
692 fixes a variety of other issues.
695 - New DirPortFrontPage option that takes an html file and publishes
696 it as "/" on the DirPort. Now relay operators can provide a
697 disclaimer without needing to set up a separate webserver. There's
698 a sample disclaimer in contrib/tor-exit-notice.html.
701 - When the client is choosing entry guards, now it selects at most
702 one guard from a given relay family. Otherwise we could end up with
703 all of our entry points into the network run by the same operator.
704 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
707 - Fix a DOS opportunity during the voting signature collection process
708 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
709 - Fix a possible segfault when establishing an exit connection. Bugfix
713 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
715 - Made Tor a little less aggressive about deleting expired
716 certificates. Partial fix for bug 854.
717 - Stop doing unaligned memory access that generated bus errors on
718 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
719 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
720 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
721 - Make USR2 log-level switch take effect immediately. Bugfix on
723 - If one win32 nameserver fails to get added, continue adding the
724 rest, and don't automatically fail.
725 - Use fcntl() for locking when flock() is not available. Should fix
726 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
727 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
728 could make gcc generate non-functional binary search code. Bugfix
730 - Build correctly on platforms without socklen_t.
731 - Avoid potential crash on internal error during signature collection.
732 Fixes bug 864. Patch from rovv.
733 - Do not use C's stdio library for writing to log files. This will
734 improve logging performance by a minute amount, and will stop
735 leaking fds when our disk is full. Fixes bug 861.
736 - Stop erroneous use of O_APPEND in cases where we did not in fact
737 want to re-seek to the end of a file before every last write().
738 - Correct handling of possible malformed authority signing key
739 certificates with internal signature types. Fixes bug 880. Bugfix
741 - Fix a hard-to-trigger resource leak when logging credential status.
745 - Directory mirrors no longer fetch the v1 directory or
746 running-routers files. They are obsolete, and nobody asks for them
747 anymore. This is the first step to making v1 authorities obsolete.
749 o Minor features (controller):
750 - Return circuit purposes in response to GETINFO circuit-status. Fixes
754 Changes in version 0.2.0.32 - 2008-11-20
755 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
756 packages (and maybe other packages) noticed by Theo de Raadt, fixes
757 a smaller security flaw that might allow an attacker to access local
758 services, further improves hidden service performance, and fixes a
759 variety of other issues.
762 - The "User" and "Group" config options did not clear the
763 supplementary group entries for the Tor process. The "User" option
764 is now more robust, and we now set the groups to the specified
765 user's primary group. The "Group" option is now ignored. For more
766 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
767 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
768 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
769 - The "ClientDNSRejectInternalAddresses" config option wasn't being
770 consistently obeyed: if an exit relay refuses a stream because its
771 exit policy doesn't allow it, we would remember what IP address
772 the relay said the destination address resolves to, even if it's
773 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
776 - Fix a DOS opportunity during the voting signature collection process
777 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
779 o Major bugfixes (hidden services):
780 - When fetching v0 and v2 rendezvous service descriptors in parallel,
781 we were failing the whole hidden service request when the v0
782 descriptor fetch fails, even if the v2 fetch is still pending and
783 might succeed. Similarly, if the last v2 fetch fails, we were
784 failing the whole hidden service request even if a v0 fetch is
785 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
786 - When extending a circuit to a hidden service directory to upload a
787 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
788 requests failed, because the router descriptor has not been
789 downloaded yet. In these cases, do not attempt to upload the
790 rendezvous descriptor, but wait until the router descriptor is
791 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
792 descriptor from a hidden service directory for which the router
793 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
797 - Fix several infrequent memory leaks spotted by Coverity.
798 - When testing for libevent functions, set the LDFLAGS variable
799 correctly. Found by Riastradh.
800 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
801 bootstrapping with tunneled directory connections. Bugfix on
802 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
803 - When asked to connect to A.B.exit:80, if we don't know the IP for A
804 and we know that server B rejects most-but-not all connections to
805 port 80, we would previously reject the connection. Now, we assume
806 the user knows what they were asking for. Fixes bug 752. Bugfix
807 on 0.0.9rc5. Diagnosed by BarkerJr.
808 - If we overrun our per-second write limits a little, count this as
809 having used up our write allocation for the second, and choke
810 outgoing directory writes. Previously, we had only counted this when
811 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
812 Bugfix on 0.2.0.x (??).
813 - Remove the old v2 directory authority 'lefkada' from the default
814 list. It has been gone for many months.
815 - Stop doing unaligned memory access that generated bus errors on
816 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
817 - Make USR2 log-level switch take effect immediately. Bugfix on
820 o Minor bugfixes (controller):
821 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
822 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
825 Changes in version 0.2.1.7-alpha - 2008-11-08
826 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
827 packages (and maybe other packages) noticed by Theo de Raadt, fixes
828 a smaller security flaw that might allow an attacker to access local
829 services, adds better defense against DNS poisoning attacks on exit
830 relays, further improves hidden service performance, and fixes a
831 variety of other issues.
834 - The "ClientDNSRejectInternalAddresses" config option wasn't being
835 consistently obeyed: if an exit relay refuses a stream because its
836 exit policy doesn't allow it, we would remember what IP address
837 the relay said the destination address resolves to, even if it's
838 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
839 - The "User" and "Group" config options did not clear the
840 supplementary group entries for the Tor process. The "User" option
841 is now more robust, and we now set the groups to the specified
842 user's primary group. The "Group" option is now ignored. For more
843 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
844 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
845 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
846 - Do not use or believe expired v3 authority certificates. Patch
847 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
850 - Now NodeFamily and MyFamily config options allow spaces in
851 identity fingerprints, so it's easier to paste them in.
852 Suggested by Lucky Green.
853 - Implement the 0x20 hack to better resist DNS poisoning: set the
854 case on outgoing DNS requests randomly, and reject responses that do
855 not match the case correctly. This logic can be disabled with the
856 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
857 of servers that do not reliably preserve case in replies. See
858 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
860 - Preserve case in replies to DNSPort requests in order to support
861 the 0x20 hack for resisting DNS poisoning attacks.
863 o Hidden service performance improvements:
864 - When the client launches an introduction circuit, retry with a
865 new circuit after 30 seconds rather than 60 seconds.
866 - Launch a second client-side introduction circuit in parallel
867 after a delay of 15 seconds (based on work by Christian Wilms).
868 - Hidden services start out building five intro circuits rather
869 than three, and when the first three finish they publish a service
870 descriptor using those. Now we publish our service descriptor much
871 faster after restart.
874 - Minor fix in the warning messages when you're having problems
875 bootstrapping; also, be more forgiving of bootstrap problems when
876 we're still making incremental progress on a given bootstrap phase.
877 - When we're choosing an exit node for a circuit, and we have
878 no pending streams, choose a good general exit rather than one that
879 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
880 - Send a valid END cell back when a client tries to connect to a
881 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
882 840. Patch from rovv.
883 - If a broken client asks a non-exit router to connect somewhere,
884 do not even do the DNS lookup before rejecting the connection.
885 Fixes another case of bug 619. Patch from rovv.
886 - Fix another case of assuming, when a specific exit is requested,
887 that we know more than the user about what hosts it allows.
888 Fixes another case of bug 752. Patch from rovv.
889 - Check which hops rendezvous stream cells are associated with to
890 prevent possible guess-the-streamid injection attacks from
891 intermediate hops. Fixes another case of bug 446. Based on patch
893 - Avoid using a negative right-shift when comparing 32-bit
894 addresses. Possible fix for bug 845 and bug 811.
895 - Make the assert_circuit_ok() function work correctly on circuits that
896 have already been marked for close.
897 - Fix read-off-the-end-of-string error in unit tests when decoding
899 - Fix uninitialized size field for memory area allocation: may improve
900 memory performance during directory parsing.
901 - Treat duplicate certificate fetches as failures, so that we do
902 not try to re-fetch an expired certificate over and over and over.
903 - Do not say we're fetching a certificate when we'll in fact skip it
904 because of a pending download.
907 Changes in version 0.2.1.6-alpha - 2008-09-30
908 Tor 0.2.1.6-alpha further improves performance and robustness of
909 hidden services, starts work on supporting per-country relay selection,
910 and fixes a variety of smaller issues.
913 - Implement proposal 121: make it possible to build hidden services
914 that only certain clients are allowed to connect to. This is
915 enforced at several points, so that unauthorized clients are unable
916 to send INTRODUCE cells to the service, or even (depending on the
917 type of authentication) to learn introduction points. This feature
918 raises the bar for certain kinds of active attacks against hidden
919 services. Code by Karsten Loesing.
920 - Relays now store and serve v2 hidden service descriptors by default,
921 i.e., the new default value for HidServDirectoryV2 is 1. This is
922 the last step in proposal 114, which aims to make hidden service
923 lookups more reliable.
924 - Start work to allow node restrictions to include country codes. The
925 syntax to exclude nodes in a country with country code XX is
926 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
927 refinement to decide what config options should take priority if
928 you ask to both use a particular node and exclude it.
929 - Allow ExitNodes list to include IP ranges and country codes, just
930 like the Exclude*Nodes lists. Patch from Robert Hogan.
933 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
934 Tor to fail to start if you had it configured to use a bridge
935 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
936 - When extending a circuit to a hidden service directory to upload a
937 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
938 requests failed, because the router descriptor had not been
939 downloaded yet. In these cases, we now wait until the router
940 descriptor is downloaded, and then retry. Likewise, clients
941 now skip over a hidden service directory if they don't yet have
942 its router descriptor, rather than futilely requesting it and
943 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
945 - When fetching v0 and v2 rendezvous service descriptors in parallel,
946 we were failing the whole hidden service request when the v0
947 descriptor fetch fails, even if the v2 fetch is still pending and
948 might succeed. Similarly, if the last v2 fetch fails, we were
949 failing the whole hidden service request even if a v0 fetch is
950 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
951 - DNS replies need to have names matching their requests, but
952 these names should be in the questions section, not necessarily
953 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
956 - Update to the "September 1 2008" ip-to-country file.
957 - Allow ports 465 and 587 in the default exit policy again. We had
958 rejected them in 0.1.0.15, because back in 2005 they were commonly
959 misconfigured and ended up as spam targets. We hear they are better
960 locked down these days.
961 - Use a lockfile to make sure that two Tor processes are not
962 simultaneously running with the same datadir.
963 - Serve the latest v3 networkstatus consensus via the control
964 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
965 - Better logging about stability/reliability calculations on directory
967 - Drop the requirement to have an open dir port for storing and
968 serving v2 hidden service descriptors.
969 - Directory authorities now serve a /tor/dbg-stability.txt URL to
970 help debug WFU and MTBF calculations.
971 - Implement most of Proposal 152: allow specialized servers to permit
972 single-hop circuits, and clients to use those servers to build
973 single-hop circuits when using a specialized controller. Patch
974 from Josh Albrecht. Resolves feature request 768.
975 - Add a -p option to tor-resolve for specifying the SOCKS port: some
976 people find host:port too confusing.
977 - Make TrackHostExit mappings expire a while after their last use, not
978 after their creation. Patch from Robert Hogan.
979 - Provide circuit purposes along with circuit events to the controller.
982 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
984 - Fixed some memory leaks -- some quite frequent, some almost
985 impossible to trigger -- based on results from Coverity.
986 - When testing for libevent functions, set the LDFLAGS variable
987 correctly. Found by Riastradh.
988 - Fix an assertion bug in parsing policy-related options; possible fix
990 - Catch and report a few more bootstrapping failure cases when Tor
991 fails to establish a TCP connection. Cleanup on 0.2.1.x.
992 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
993 bootstrapping with tunneled directory connections. Bugfix on
994 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
995 - When asked to connect to A.B.exit:80, if we don't know the IP for A
996 and we know that server B rejects most-but-not all connections to
997 port 80, we would previously reject the connection. Now, we assume
998 the user knows what they were asking for. Fixes bug 752. Bugfix
999 on 0.0.9rc5. Diagnosed by BarkerJr.
1000 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
1001 service directories if they have no advertised dir port. Bugfix
1003 - If we overrun our per-second write limits a little, count this as
1004 having used up our write allocation for the second, and choke
1005 outgoing directory writes. Previously, we had only counted this when
1006 we had met our limits precisely. Fixes bug 824. Patch by rovv.
1007 Bugfix on 0.2.0.x (??).
1008 - Avoid a "0 divided by 0" calculation when calculating router uptime
1009 at directory authorities. Bugfix on 0.2.0.8-alpha.
1010 - Make DNS resolved controller events into "CLOSED", not
1011 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
1013 - Fix a bug where an unreachable relay would establish enough
1014 reachability testing circuits to do a bandwidth test -- if
1015 we already have a connection to the middle hop of the testing
1016 circuit, then it could establish the last hop by using the existing
1017 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
1018 circuits no longer use entry guards in 0.2.1.3-alpha.
1019 - If we have correct permissions on $datadir, we complain to stdout
1020 and fail to start. But dangerous permissions on
1021 $datadir/cached-status/ would cause us to open a log and complain
1022 there. Now complain to stdout and fail to start in both cases. Fixes
1023 bug 820, reported by seeess.
1024 - Remove the old v2 directory authority 'lefkada' from the default
1025 list. It has been gone for many months.
1027 o Code simplifications and refactoring:
1028 - Revise the connection_new functions so that a more typesafe variant
1029 exists. This will work better with Coverity, and let us find any
1030 actual mistakes we're making here.
1031 - Refactor unit testing logic so that dmalloc can be used sensibly
1032 with unit tests to check for memory leaks.
1033 - Move all hidden-service related fields from connection and circuit
1034 structure to substructures: this way they won't eat so much memory.
1037 Changes in version 0.2.0.31 - 2008-09-03
1038 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
1039 a big bug we're seeing where in rare cases traffic from one Tor stream
1040 gets mixed into another stream, and fixes a variety of smaller issues.
1043 - Make sure that two circuits can never exist on the same connection
1044 with the same circuit ID, even if one is marked for close. This
1045 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
1046 - Relays now reject risky extend cells: if the extend cell includes
1047 a digest of all zeroes, or asks to extend back to the relay that
1048 sent the extend cell, tear down the circuit. Ideas suggested
1050 - If not enough of our entry guards are available so we add a new
1051 one, we might use the new one even if it overlapped with the
1052 current circuit's exit relay (or its family). Anonymity bugfix
1053 pointed out by rovv.
1056 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
1057 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
1058 - Correctly detect the presence of the linux/netfilter_ipv4.h header
1059 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
1060 - Pick size of default geoip filename string correctly on windows.
1061 Fixes bug 806. Bugfix on 0.2.0.30.
1062 - Make the autoconf script accept the obsolete --with-ssl-dir
1063 option as an alias for the actually-working --with-openssl-dir
1064 option. Fix the help documentation to recommend --with-openssl-dir.
1065 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
1066 - When using the TransPort option on OpenBSD, and using the User
1067 option to change UID and drop privileges, make sure to open
1068 /dev/pf before dropping privileges. Fixes bug 782. Patch from
1069 Christopher Davis. Bugfix on 0.1.2.1-alpha.
1070 - Try to attach connections immediately upon receiving a RENDEZVOUS2
1071 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
1072 on the client side when connecting to a hidden service. Bugfix
1073 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
1074 - When closing an application-side connection because its circuit is
1075 getting torn down, generate the stream event correctly. Bugfix on
1076 0.1.2.x. Anonymous patch.
1079 Changes in version 0.2.1.5-alpha - 2008-08-31
1080 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
1081 in a lot of the infrastructure for adding authorization to hidden
1082 services, lays the groundwork for having clients read their load
1083 balancing information out of the networkstatus consensus rather than
1084 the individual router descriptors, addresses two potential anonymity
1085 issues, and fixes a variety of smaller issues.
1088 - Convert many internal address representations to optionally hold
1090 - Generate and accept IPv6 addresses in many protocol elements.
1091 - Make resolver code handle nameservers located at ipv6 addresses.
1092 - Begin implementation of proposal 121 ("Client authorization for
1093 hidden services"): configure hidden services with client
1094 authorization, publish descriptors for them, and configure
1095 authorization data for hidden services at clients. The next
1096 step is to actually access hidden services that perform client
1098 - More progress toward proposal 141: Network status consensus
1099 documents and votes now contain bandwidth information for each
1100 router and a summary of that router's exit policy. Eventually this
1101 will be used by clients so that they do not have to download every
1102 known descriptor before building circuits.
1104 o Major bugfixes (on 0.2.0.x and before):
1105 - When sending CREATED cells back for a given circuit, use a 64-bit
1106 connection ID to find the right connection, rather than an addr:port
1107 combination. Now that we can have multiple OR connections between
1108 the same ORs, it is no longer possible to use addr:port to uniquely
1109 identify a connection.
1110 - Relays now reject risky extend cells: if the extend cell includes
1111 a digest of all zeroes, or asks to extend back to the relay that
1112 sent the extend cell, tear down the circuit. Ideas suggested
1114 - If not enough of our entry guards are available so we add a new
1115 one, we might use the new one even if it overlapped with the
1116 current circuit's exit relay (or its family). Anonymity bugfix
1117 pointed out by rovv.
1120 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
1121 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
1122 - When using the TransPort option on OpenBSD, and using the User
1123 option to change UID and drop privileges, make sure to open /dev/pf
1124 before dropping privileges. Fixes bug 782. Patch from Christopher
1125 Davis. Bugfix on 0.1.2.1-alpha.
1126 - Correctly detect the presence of the linux/netfilter_ipv4.h header
1127 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
1128 - Add a missing safe_str() call for a debug log message.
1129 - Use 64 bits instead of 32 bits for connection identifiers used with
1130 the controller protocol, to greatly reduce risk of identifier reuse.
1131 - Make the autoconf script accept the obsolete --with-ssl-dir
1132 option as an alias for the actually-working --with-openssl-dir
1133 option. Fix the help documentation to recommend --with-openssl-dir.
1134 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
1137 - Rate-limit too-many-sockets messages: when they happen, they happen
1138 a lot. Resolves bug 748.
1139 - Resist DNS poisoning a little better by making sure that names in
1140 answer sections match.
1141 - Print the SOCKS5 error message string as well as the error code
1142 when a tor-resolve request fails. Patch from Jacob.
1145 Changes in version 0.2.1.4-alpha - 2008-08-04
1146 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
1149 - The address part of exit policies was not correctly written
1150 to router descriptors. This generated router descriptors that failed
1151 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
1153 - Tor triggered a false assert when extending a circuit to a relay
1154 but we already have a connection open to that relay. Noticed by
1155 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
1158 - Fix a hidden service logging bug: in some edge cases, the router
1159 descriptor of a previously picked introduction point becomes
1160 obsolete and we need to give up on it rather than continually
1161 complaining that it has become obsolete. Observed by xiando. Bugfix
1165 - Take out the TestVia config option, since it was a workaround for
1166 a bug that was fixed in Tor 0.1.1.21.
1169 Changes in version 0.2.1.3-alpha - 2008-08-03
1170 Tor 0.2.1.3-alpha implements most of the pieces to prevent
1171 infinite-length circuit attacks (see proposal 110); fixes a bug that
1172 might cause exit relays to corrupt streams they send back; allows
1173 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
1174 ExcludeExitNodes config options; and fixes a big pile of bugs.
1176 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
1177 - Send a bootstrap problem "warn" event on the first problem if the
1178 reason is NO_ROUTE (that is, our network is down).
1181 - Implement most of proposal 110: The first K cells to be sent
1182 along a circuit are marked as special "early" cells; only K "early"
1183 cells will be allowed. Once this code is universal, we can block
1184 certain kinds of DOS attack by requiring that EXTEND commands must
1185 be sent using an "early" cell.
1188 - Try to attach connections immediately upon receiving a RENDEZVOUS2
1189 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
1190 on the client side when connecting to a hidden service. Bugfix
1191 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
1192 - Ensure that two circuits can never exist on the same connection
1193 with the same circuit ID, even if one is marked for close. This
1194 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
1197 - When relays do their initial bandwidth measurement, don't limit
1198 to just our entry guards for the test circuits. Otherwise we tend
1199 to have multiple test circuits going through a single entry guard,
1200 which makes our bandwidth test less accurate. Fixes part of bug 654;
1201 patch contributed by Josh Albrecht.
1202 - Add an ExcludeExitNodes option so users can list a set of nodes
1203 that should be be excluded from the exit node position, but
1204 allowed elsewhere. Implements proposal 151.
1205 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
1206 ExcludeNodes and ExcludeExitNodes lists.
1207 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
1208 be more efficient. Formerly it was quadratic in the number of
1209 servers; now it should be linear. Fixes bug 509.
1210 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
1211 and n_conn_id_digest fields into a separate structure that's
1212 only needed when the circuit has not yet attached to an n_conn.
1215 - Change the contrib/tor.logrotate script so it makes the new
1216 logs as "_tor:_tor" rather than the default, which is generally
1217 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
1218 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1219 warnings (occasionally), but it can also cause the compiler to
1220 eliminate error-checking code. Suggested by Peter Gutmann.
1221 - When a hidden service is giving up on an introduction point candidate
1222 that was not included in the last published rendezvous descriptor,
1223 don't reschedule publication of the next descriptor. Fixes bug 763.
1225 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
1226 HiddenServiceExcludeNodes as obsolete: they never worked properly,
1227 and nobody claims to be using them. Fixes bug 754. Bugfix on
1228 0.1.0.1-rc. Patch from Christian Wilms.
1229 - Fix a small alignment and memory-wasting bug on buffer chunks.
1232 o Minor bugfixes (controller):
1233 - When closing an application-side connection because its circuit
1234 is getting torn down, generate the stream event correctly.
1235 Bugfix on 0.1.2.x. Anonymous patch.
1238 - Remove all backward-compatibility code to support relays running
1239 versions of Tor so old that they no longer work at all on the
1243 Changes in version 0.2.0.30 - 2008-07-15
1245 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1246 warnings (occasionally), but it can also cause the compiler to
1247 eliminate error-checking code. Suggested by Peter Gutmann.
1250 Changes in version 0.2.0.29-rc - 2008-07-08
1251 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
1252 hidden-service performance bugs, and fixes a bunch of smaller bugs.
1255 - If you have more than one bridge but don't know their keys,
1256 you would only launch a request for the descriptor of the first one
1257 on your list. (Tor considered launching requests for the others, but
1258 found that it already had a connection on the way for $0000...0000
1259 so it didn't open another.) Bugfix on 0.2.0.x.
1260 - If you have more than one bridge but don't know their keys, and the
1261 connection to one of the bridges failed, you would cancel all
1262 pending bridge connections. (After all, they all have the same
1263 digest.) Bugfix on 0.2.0.x.
1264 - When a hidden service was trying to establish an introduction point,
1265 and Tor had built circuits preemptively for such purposes, we
1266 were ignoring all the preemptive circuits and launching a new one
1267 instead. Bugfix on 0.2.0.14-alpha.
1268 - When a hidden service was trying to establish an introduction point,
1269 and Tor *did* manage to reuse one of the preemptively built
1270 circuits, it didn't correctly remember which one it used,
1271 so it asked for another one soon after, until there were no
1272 more preemptive circuits, at which point it launched one from
1273 scratch. Bugfix on 0.0.9.x.
1274 - Make directory servers include the X-Your-Address-Is: http header in
1275 their responses even for begin_dir conns. Now clients who only
1276 ever use begin_dir connections still have a way to learn their IP
1277 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
1280 - Fix a macro/CPP interaction that was confusing some compilers:
1281 some GCCs don't like #if/#endif pairs inside macro arguments.
1283 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
1284 Fixes bug 704; fix from Steven Murdoch.
1285 - When opening /dev/null in finish_daemonize(), do not pass the
1286 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
1287 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
1288 - Correctly detect transparent proxy support on Linux hosts that
1289 require in.h to be included before netfilter_ipv4.h. Patch
1291 - Disallow session resumption attempts during the renegotiation
1292 stage of the v2 handshake protocol. Clients should never be trying
1293 session resumption at this point, but apparently some did, in
1294 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
1295 found by Geoff Goodell.
1298 Changes in version 0.2.1.2-alpha - 2008-06-20
1299 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
1300 make it easier to set up your own private Tor network; fixes several
1301 big bugs with using more than one bridge relay; fixes a big bug with
1302 offering hidden services quickly after Tor starts; and uses a better
1303 API for reporting potential bootstrapping problems to the controller.
1306 - New TestingTorNetwork config option to allow adjustment of
1307 previously constant values that, while reasonable, could slow
1308 bootstrapping. Implements proposal 135. Patch from Karsten.
1311 - If you have more than one bridge but don't know their digests,
1312 you would only learn a request for the descriptor of the first one
1313 on your list. (Tor considered launching requests for the others, but
1314 found that it already had a connection on the way for $0000...0000
1315 so it didn't open another.) Bugfix on 0.2.0.x.
1316 - If you have more than one bridge but don't know their digests,
1317 and the connection to one of the bridges failed, you would cancel
1318 all pending bridge connections. (After all, they all have the
1319 same digest.) Bugfix on 0.2.0.x.
1320 - When establishing a hidden service, introduction points that
1321 originate from cannibalized circuits are completely ignored and not
1322 included in rendezvous service descriptors. This might be another
1323 reason for delay in making a hidden service available. Bugfix
1324 from long ago (0.0.9.x?)
1327 - Allow OpenSSL to use dynamic locks if it wants.
1328 - When building a consensus, do not include routers that are down.
1329 This will cut down 30% to 40% on consensus size. Implements
1331 - In directory authorities' approved-routers files, allow
1332 fingerprints with or without space.
1333 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
1334 controller can query our current bootstrap state in case it attaches
1335 partway through and wants to catch up.
1336 - Send an initial "Starting" bootstrap status event, so we have a
1337 state to start out in.
1340 - Asking for a conditional consensus at .../consensus/<fingerprints>
1341 would crash a dirserver if it did not already have a
1342 consensus. Bugfix on 0.2.1.1-alpha.
1343 - Clean up some macro/CPP interactions: some GCC versions don't like
1344 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
1347 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
1348 - Directory authorities shouldn't complain about bootstrapping
1349 problems just because they do a lot of reachability testing and
1350 some of the connection attempts fail.
1351 - Start sending "count" and "recommendation" key/value pairs in
1352 bootstrap problem status events, so the controller can hear about
1353 problems even before Tor decides they're worth reporting for sure.
1354 - If you're using bridges, generate "bootstrap problem" warnings
1355 as soon as you run out of working bridges, rather than waiting
1356 for ten failures -- which will never happen if you have less than
1358 - If we close our OR connection because there's been a circuit
1359 pending on it for too long, we were telling our bootstrap status
1360 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
1363 Changes in version 0.2.1.1-alpha - 2008-06-13
1364 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
1365 were making the Tor process bloat especially on Linux; makes our TLS
1366 handshake blend in better; sends "bootstrap phase" status events to
1367 the controller, so it can keep the user informed of progress (and
1368 problems) fetching directory information and establishing circuits;
1369 and adds a variety of smaller features.
1372 - More work on making our TLS handshake blend in: modify the list
1373 of ciphers advertised by OpenSSL in client mode to even more
1374 closely resemble a common web browser. We cheat a little so that
1375 we can advertise ciphers that the locally installed OpenSSL doesn't
1377 - Start sending "bootstrap phase" status events to the controller,
1378 so it can keep the user informed of progress fetching directory
1379 information and establishing circuits. Also inform the controller
1380 if we think we're stuck at a particular bootstrap phase. Implements
1382 - Resume using OpenSSL's RAND_poll() for better (and more portable)
1383 cross-platform entropy collection again. We used to use it, then
1384 stopped using it because of a bug that could crash systems that
1385 called RAND_poll when they had a lot of fds open. It looks like the
1386 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
1387 at startup, and to call RAND_poll() when we reseed later only if
1388 we have a non-buggy OpenSSL version.
1391 - When we choose to abandon a new entry guard because we think our
1392 older ones might be better, close any circuits pending on that
1393 new entry guard connection. This fix should make us recover much
1394 faster when our network is down and then comes back. Bugfix on
1395 0.1.2.8-beta; found by lodger.
1397 o Memory fixes and improvements:
1398 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
1399 to avoid unused RAM in buffer chunks and memory pools.
1400 - Speed up parsing and cut down on memory fragmentation by using
1401 stack-style allocations for parsing directory objects. Previously,
1402 this accounted for over 40% of allocations from within Tor's code
1403 on a typical directory cache.
1404 - Use a Bloom filter rather than a digest-based set to track which
1405 descriptors we need to keep around when we're cleaning out old
1406 router descriptors. This speeds up the computation significantly,
1407 and may reduce fragmentation.
1408 - Reduce the default smartlist size from 32 to 16; it turns out that
1409 most smartlists hold around 8-12 elements tops.
1410 - Make dumpstats() log the fullness and size of openssl-internal
1412 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
1413 patch to their OpenSSL, turn it on to save memory on servers. This
1414 patch will (with any luck) get included in a mainline distribution
1416 - Never use OpenSSL compression: it wastes RAM and CPU trying to
1417 compress cells, which are basically all encrypted, compressed,
1421 - Stop reloading the router list from disk for no reason when we
1422 run out of reachable directory mirrors. Once upon a time reloading
1423 it would set the 'is_running' flag back to 1 for them. It hasn't
1424 done that for a long time.
1425 - In very rare situations new hidden service descriptors were
1426 published earlier than 30 seconds after the last change to the
1427 service. (We currently think that a hidden service descriptor
1428 that's been stable for 30 seconds is worth publishing.)
1431 - Allow separate log levels to be configured for different logging
1432 domains. For example, this allows one to log all notices, warnings,
1433 or errors, plus all memory management messages of level debug or
1434 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
1435 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
1436 and stop using a warning that had become unfixably verbose under
1438 - New --hush command-line option similar to --quiet. While --quiet
1439 disables all logging to the console on startup, --hush limits the
1440 output to messages of warning and error severity.
1441 - Servers support a new URL scheme for consensus downloads that
1442 allows the client to specify which authorities are trusted.
1443 The server then only sends the consensus if the client will trust
1444 it. Otherwise a 404 error is sent back. Clients use this
1445 new scheme when the server supports it (meaning it's running
1446 0.2.1.1-alpha or later). Implements proposal 134.
1447 - New configure/torrc options (--enable-geoip-stats,
1448 DirRecordUsageByCountry) to record how many IPs we've served
1449 directory info to in each country code, how many status documents
1450 total we've sent to each country code, and what share of the total
1451 directory requests we should expect to see.
1452 - Use the TLS1 hostname extension to more closely resemble browser
1454 - Lots of new unit tests.
1455 - Add a macro to implement the common pattern of iterating through
1456 two parallel lists in lockstep.
1459 Changes in version 0.2.0.28-rc - 2008-06-13
1460 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
1461 performance bug, and fixes a bunch of smaller bugs.
1464 - Fix a bug where, when we were choosing the 'end stream reason' to
1465 put in our relay end cell that we send to the exit relay, Tor
1466 clients on Windows were sometimes sending the wrong 'reason'. The
1467 anonymity problem is that exit relays may be able to guess whether
1468 the client is running Windows, thus helping partition the anonymity
1469 set. Down the road we should stop sending reasons to exit relays,
1470 or otherwise prevent future versions of this bug.
1473 - While setting up a hidden service, some valid introduction circuits
1474 were overlooked and abandoned. This might be the reason for
1475 the long delay in making a hidden service available. Bugfix on
1479 - Update to the "June 9 2008" ip-to-country file.
1480 - Run 'make test' as part of 'make dist', so we stop releasing so
1481 many development snapshots that fail their unit tests.
1484 - When we're checking if we have enough dir info for each relay
1485 to begin establishing circuits, make sure that we actually have
1486 the descriptor listed in the consensus, not just any descriptor.
1488 - Bridge relays no longer print "xx=0" in their extrainfo document
1489 for every single country code in the geoip db. Bugfix on
1491 - Only warn when we fail to load the geoip file if we were planning to
1492 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
1493 - If we change our MaxAdvertisedBandwidth and then reload torrc,
1494 Tor won't realize it should publish a new relay descriptor. Fixes
1495 bug 688, reported by mfr. Bugfix on 0.1.2.x.
1496 - When we haven't had any application requests lately, don't bother
1497 logging that we have expired a bunch of descriptors. Bugfix
1499 - Make relay cells written on a connection count as non-padding when
1500 tracking how long a connection has been in use. Bugfix on
1501 0.2.0.1-alpha. Spotted by lodger.
1502 - Fix unit tests in 0.2.0.27-rc.
1503 - Fix compile on Windows.
1506 Changes in version 0.2.0.27-rc - 2008-06-03
1507 Tor 0.2.0.27-rc adds a few features we left out of the earlier
1508 release candidates. In particular, we now include an IP-to-country
1509 GeoIP database, so controllers can easily look up what country a
1510 given relay is in, and so bridge relays can give us some sanitized
1511 summaries about which countries are making use of bridges. (See proposal
1512 126-geoip-fetching.txt for details.)
1515 - Include an IP-to-country GeoIP file in the tarball, so bridge
1516 relays can report sanitized summaries of the usage they're seeing.
1519 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
1520 Robert Hogan. Fixes the first part of bug 681.
1521 - Make bridge authorities never serve extrainfo docs.
1522 - Add support to detect Libevent versions in the 1.4.x series
1524 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
1525 - Include a new contrib/tor-exit-notice.html file that exit relay
1526 operators can put on their website to help reduce abuse queries.
1529 - When tunneling an encrypted directory connection, and its first
1530 circuit fails, do not leave it unattached and ask the controller
1531 to deal. Fixes the second part of bug 681.
1532 - Make bridge authorities correctly expire old extrainfo documents
1536 Changes in version 0.2.0.26-rc - 2008-05-13
1537 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
1538 in Debian's OpenSSL packages. All users running any 0.2.0.x version
1539 should upgrade, whether they're running Debian or not.
1541 o Major security fixes:
1542 - Use new V3 directory authority keys on the tor26, gabelmoo, and
1543 moria1 V3 directory authorities. The old keys were generated with
1544 a vulnerable version of Debian's OpenSSL package, and must be
1545 considered compromised. Other authorities' keys were not generated
1546 with an affected version of OpenSSL.
1549 - List authority signatures as "unrecognized" based on DirServer
1550 lines, not on cert cache. Bugfix on 0.2.0.x.
1553 - Add a new V3AuthUseLegacyKey option to make it easier for
1554 authorities to change their identity keys if they have to.
1557 Changes in version 0.2.0.25-rc - 2008-04-23
1558 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
1561 - Remember to initialize threading before initializing logging.
1562 Otherwise, many BSD-family implementations will crash hard on
1563 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
1566 - Authorities correctly free policies on bad servers on
1567 exit. Fixes bug 672. Bugfix on 0.2.0.x.
1570 Changes in version 0.2.0.24-rc - 2008-04-22
1571 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
1572 v3 directory authority, makes relays with dynamic IP addresses and no
1573 DirPort notice more quickly when their IP address changes, fixes a few
1574 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
1576 o New directory authorities:
1577 - Take lefkada out of the list of v3 directory authorities, since
1578 it has been down for months.
1579 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
1583 - Detect address changes more quickly on non-directory mirror
1584 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
1586 o Minor features (security):
1587 - Reject requests for reverse-dns lookup of names that are in
1588 a private address space. Patch from lodger.
1589 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
1592 o Minor bugfixes (crashes):
1593 - Avoid a rare assert that can trigger when Tor doesn't have much
1594 directory information yet and it tries to fetch a v2 hidden
1595 service descriptor. Fixes bug 651, reported by nwf.
1596 - Initialize log mutex before initializing dmalloc. Otherwise,
1597 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
1598 - Use recursive pthread mutexes in order to avoid deadlock when
1599 logging debug-level messages to a controller. Bug spotted by nwf,
1600 bugfix on 0.2.0.16-alpha.
1602 o Minor bugfixes (resource management):
1603 - Keep address policies from leaking memory: start their refcount
1604 at 1, not 2. Bugfix on 0.2.0.16-alpha.
1605 - Free authority certificates on exit, so they don't look like memory
1606 leaks. Bugfix on 0.2.0.19-alpha.
1607 - Free static hashtables for policy maps and for TLS connections on
1608 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
1609 - Avoid allocating extra space when computing consensuses on 64-bit
1610 platforms. Bug spotted by aakova.
1612 o Minor bugfixes (misc):
1613 - Do not read the configuration file when we've only been told to
1614 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
1615 based on patch from Sebastian Hahn.
1616 - Exit relays that are used as a client can now reach themselves
1617 using the .exit notation, rather than just launching an infinite
1618 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
1619 - When attempting to open a logfile fails, tell us why.
1620 - Fix a dumb bug that was preventing us from knowing that we should
1621 preemptively build circuits to handle expected directory requests.
1622 Fixes bug 660. Bugfix on 0.1.2.x.
1623 - Warn less verbosely about clock skew from netinfo cells from
1624 untrusted sources. Fixes bug 663.
1625 - Make controller stream events for DNS requests more consistent,
1626 by adding "new stream" events for DNS requests, and removing
1627 spurious "stream closed" events" for cached reverse resolves.
1628 Patch from mwenge. Fixes bug 646.
1629 - Correctly notify one-hop connections when a circuit build has
1630 failed. Possible fix for bug 669. Found by lodger.
1633 Changes in version 0.2.0.23-rc - 2008-03-24
1634 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
1635 makes bootstrapping faster if the first directory mirror you contact
1636 is down. The bundles also include the new Vidalia 0.1.2 release.
1639 - When a tunneled directory request is made to a directory server
1640 that's down, notice after 30 seconds rather than 120 seconds. Also,
1641 fail any begindir streams that are pending on it, so they can
1642 retry elsewhere. This was causing multi-minute delays on bootstrap.
1645 Changes in version 0.2.0.22-rc - 2008-03-18
1646 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
1647 enables encrypted directory connections by default for non-relays, fixes
1648 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
1649 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
1652 - Enable encrypted directory connections by default for non-relays,
1653 so censor tools that block Tor directory connections based on their
1654 plaintext patterns will no longer work. This means Tor works in
1655 certain censored countries by default again.
1658 - Make sure servers always request certificates from clients during
1659 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
1660 - Do not enter a CPU-eating loop when a connection is closed in
1661 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
1662 diagnosed by lodger; bugfix on 0.2.0.20-rc.
1663 - Fix assertion failure that could occur when a blocked circuit
1664 became unblocked, and it had pending client DNS requests. Bugfix
1665 on 0.2.0.1-alpha. Fixes bug 632.
1667 o Minor bugfixes (on 0.1.2.x):
1668 - Generate "STATUS_SERVER" events rather than misspelled
1669 "STATUS_SEVER" events. Caught by mwenge.
1670 - When counting the number of bytes written on a TLS connection,
1671 look at the BIO actually used for writing to the network, not
1672 at the BIO used (sometimes) to buffer data for the network.
1673 Looking at different BIOs could result in write counts on the
1674 order of ULONG_MAX. Fixes bug 614.
1675 - On Windows, correctly detect errors when listing the contents of
1676 a directory. Fix from lodger.
1678 o Minor bugfixes (on 0.2.0.x):
1679 - Downgrade "sslv3 alert handshake failure" message to INFO.
1680 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
1681 left BandwidthRate and BandwidthBurst at the default, we would be
1682 silently limited by those defaults. Now raise them to match the
1683 RelayBandwidth* values.
1684 - Fix the SVK version detection logic to work correctly on a branch.
1685 - Make --enable-openbsd-malloc work correctly on Linux with alpha
1686 CPUs. Fixes bug 625.
1687 - Logging functions now check that the passed severity is sane.
1688 - Use proper log levels in the testsuite call of
1689 get_interface_address6().
1690 - When using a nonstandard malloc, do not use the platform values for
1691 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
1692 - Make the openbsd malloc code use 8k pages on alpha CPUs and
1694 - Detect mismatched page sizes when using --enable-openbsd-malloc.
1695 - Avoid double-marked-for-close warning when certain kinds of invalid
1696 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
1697 for bug 617. Bugfix on 0.2.0.1-alpha.
1698 - Make sure that the "NULL-means-reject *:*" convention is followed by
1699 all the policy manipulation functions, avoiding some possible crash
1700 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
1701 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
1702 actually works, and doesn't warn about every single reverse lookup.
1703 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
1706 - Only log guard node status when guard node status has changed.
1707 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
1708 make "INFO" 75% less verbose.
1711 Changes in version 0.2.0.21-rc - 2008-03-02
1712 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
1713 makes Tor work well with Vidalia again, fixes a rare assert bug,
1714 and fixes a pair of more minor bugs. The bundles also include Vidalia
1715 0.1.0 and Torbutton 1.1.16.
1718 - The control port should declare that it requires password auth
1719 when HashedControlSessionPassword is set too. Patch from Matt Edman;
1720 bugfix on 0.2.0.20-rc. Fixes bug 615.
1721 - Downgrade assert in connection_buckets_decrement() to a log message.
1722 This may help us solve bug 614, and in any case will make its
1723 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
1724 - We were sometimes miscounting the number of bytes read from the
1725 network, causing our rate limiting to not be followed exactly.
1726 Bugfix on 0.2.0.16-alpha. Reported by lodger.
1729 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
1730 OpenSSL versions should have been working fine. Diagnosis and patch
1731 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
1732 Bugfix on 0.2.0.20-rc.
1735 Changes in version 0.2.0.20-rc - 2008-02-24
1736 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
1737 makes more progress towards normalizing Tor's TLS handshake, makes
1738 hidden services work better again, helps relays bootstrap if they don't
1739 know their IP address, adds optional support for linking in openbsd's
1740 allocator or tcmalloc, allows really fast relays to scale past 15000
1741 sockets, and fixes a bunch of minor bugs reported by Veracode.
1744 - Enable the revised TLS handshake based on the one designed by
1745 Steven Murdoch in proposal 124, as revised in proposal 130. It
1746 includes version negotiation for OR connections as described in
1747 proposal 105. The new handshake is meant to be harder for censors
1748 to fingerprint, and it adds the ability to detect certain kinds of
1749 man-in-the-middle traffic analysis attacks. The version negotiation
1750 feature will allow us to improve Tor's link protocol more safely
1752 - Choose which bridge to use proportional to its advertised bandwidth,
1753 rather than uniformly at random. This should speed up Tor for
1754 bridge users. Also do this for people who set StrictEntryNodes.
1755 - When a TrackHostExits-chosen exit fails too many times in a row,
1756 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
1759 - Resolved problems with (re-)fetching hidden service descriptors.
1760 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
1762 - If we only ever used Tor for hidden service lookups or posts, we
1763 would stop building circuits and start refusing connections after
1764 24 hours, since we falsely believed that Tor was dormant. Reported
1765 by nwf; bugfix on 0.1.2.x.
1766 - Servers that don't know their own IP address should go to the
1767 authorities for their first directory fetch, even if their DirPort
1768 is off or if they don't know they're reachable yet. This will help
1769 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
1770 - When counting the number of open sockets, count not only the number
1771 of sockets we have received from the socket() call, but also
1772 the number we've gotten from accept() and socketpair(). This bug
1773 made us fail to count all sockets that we were using for incoming
1774 connections. Bugfix on 0.2.0.x.
1775 - Fix code used to find strings within buffers, when those strings
1776 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
1777 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
1778 - Add a new __HashedControlSessionPassword option for controllers
1779 to use for one-off session password hashes that shouldn't get
1780 saved to disk by SAVECONF --- Vidalia users were accumulating a
1781 pile of HashedControlPassword lines in their torrc files, one for
1782 each time they had restarted Tor and then clicked Save. Make Tor
1783 automatically convert "HashedControlPassword" to this new option but
1784 only when it's given on the command line. Partial fix for bug 586.
1786 o Minor features (performance):
1787 - Tune parameters for cell pool allocation to minimize amount of
1789 - Add OpenBSD malloc code from phk as an optional malloc
1790 replacement on Linux: some glibc libraries do very poorly
1791 with Tor's memory allocation patterns. Pass
1792 --enable-openbsd-malloc to get the replacement malloc code.
1793 - Add a --with-tcmalloc option to the configure script to link
1794 against tcmalloc (if present). Does not yet search for
1795 non-system include paths.
1796 - Stop imposing an arbitrary maximum on the number of file descriptors
1797 used for busy servers. Bug reported by Olaf Selke; patch from
1800 o Minor features (other):
1801 - When SafeLogging is disabled, log addresses along with all TLS
1803 - When building with --enable-gcc-warnings, check for whether Apple's
1804 warning "-Wshorten-64-to-32" is available.
1805 - Add a --passphrase-fd argument to the tor-gencert command for
1808 o Minor bugfixes (memory leaks and code problems):
1809 - We were leaking a file descriptor if Tor started with a zero-length
1810 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
1811 - Detect size overflow in zlib code. Reported by Justin Ferguson and
1813 - We were comparing the raw BridgePassword entry with a base64'ed
1814 version of it, when handling a "/tor/networkstatus-bridges"
1815 directory request. Now compare correctly. Noticed by Veracode.
1816 - Recover from bad tracked-since value in MTBF-history file.
1818 - Alter the code that tries to recover from unhandled write
1819 errors, to not try to flush onto a socket that's given us
1820 unhandled errors. Bugfix on 0.1.2.x.
1821 - Make Unix controlsockets work correctly on OpenBSD. Patch from
1822 tup. Bugfix on 0.2.0.3-alpha.
1824 o Minor bugfixes (other):
1825 - If we have an extra-info document for our server, always make
1826 it available on the control port, even if we haven't gotten
1827 a copy of it from an authority yet. Patch from mwenge.
1828 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
1829 - Directory mirrors no longer include a guess at the client's IP
1830 address if the connection appears to be coming from the same /24
1831 network; it was producing too many wrong guesses.
1832 - Make the new hidden service code respect the SafeLogging setting.
1833 Bugfix on 0.2.0.x. Patch from Karsten.
1834 - When starting as an authority, do not overwrite all certificates
1835 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
1836 - If we're trying to flush the last bytes on a connection (for
1837 example, when answering a directory request), reset the
1838 time-to-give-up timeout every time we manage to write something
1839 on the socket. Bugfix on 0.1.2.x.
1840 - Change the behavior of "getinfo status/good-server-descriptor"
1841 so it doesn't return failure when any authority disappears.
1842 - Even though the man page said that "TrackHostExits ." should
1843 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
1844 - Report TLS "zero return" case as a "clean close" and "IO error"
1845 as a "close". Stop calling closes "unexpected closes": existing
1846 Tors don't use SSL_close(), so having a connection close without
1847 the TLS shutdown handshake is hardly unexpected.
1848 - Send NAMESERVER_STATUS messages for a single failed nameserver
1851 o Code simplifications and refactoring:
1852 - Remove the tor_strpartition function: its logic was confused,
1853 and it was only used for one thing that could be implemented far
1857 Changes in version 0.2.0.19-alpha - 2008-02-09
1858 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
1859 handshake, makes path selection for relays more secure and IP address
1860 guessing more robust, and generally fixes a lot of bugs in preparation
1861 for calling the 0.2.0 branch stable.
1864 - Do not include recognizeable strings in the commonname part of
1865 Tor's x509 certificates.
1868 - If we're a relay, avoid picking ourselves as an introduction point,
1869 a rendezvous point, or as the final hop for internal circuits. Bug
1870 reported by taranis and lodger. Bugfix on 0.1.2.x.
1871 - Patch from "Andrew S. Lists" to catch when we contact a directory
1872 mirror at IP address X and he says we look like we're coming from
1873 IP address X. Bugfix on 0.1.2.x.
1875 o Minor features (security):
1876 - Be more paranoid about overwriting sensitive memory on free(),
1877 as a defensive programming tactic to ensure forward secrecy.
1879 o Minor features (directory authority):
1880 - Actually validate the options passed to AuthDirReject,
1881 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
1882 - Reject router descriptors with out-of-range bandwidthcapacity or
1883 bandwidthburst values.
1885 o Minor features (controller):
1886 - Reject controller commands over 1MB in length. This keeps rogue
1887 processes from running us out of memory.
1889 o Minor features (misc):
1890 - Give more descriptive well-formedness errors for out-of-range
1891 hidden service descriptor/protocol versions.
1892 - Make memory debugging information describe more about history
1893 of cell allocation, so we can help reduce our memory use.
1895 o Deprecated features (controller):
1896 - The status/version/num-versioning and status/version/num-concurring
1897 GETINFO options are no longer useful in the v3 directory protocol:
1898 treat them as deprecated, and warn when they're used.
1901 - When our consensus networkstatus has been expired for a while, stop
1902 being willing to build circuits using it. Fixes bug 401. Bugfix
1904 - Directory caches now fetch certificates from all authorities
1905 listed in a networkstatus consensus, even when they do not
1906 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
1907 - When connecting to a bridge without specifying its key, insert
1908 the connection into the identity-to-connection map as soon as
1909 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
1910 - Detect versions of OS X where malloc_good_size() is present in the
1911 library but never actually declared. Resolves bug 587. Bugfix
1913 - Stop incorrectly truncating zlib responses to directory authority
1914 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
1915 - Stop recommending that every server operator send mail to tor-ops.
1916 Resolves bug 597. Bugfix on 0.1.2.x.
1917 - Don't trigger an assert if we start a directory authority with a
1918 private IP address (like 127.0.0.1).
1919 - Avoid possible failures when generating a directory with routers
1920 with over-long versions strings, or too many flags set. Bugfix
1922 - If an attempt to launch a DNS resolve request over the control
1923 port fails because we have overrun the limit on the number of
1924 connections, tell the controller that the request has failed.
1925 - Avoid using too little bandwidth when our clock skips a few
1926 seconds. Bugfix on 0.1.2.x.
1927 - Fix shell error when warning about missing packages in configure
1928 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
1929 - Do not become confused when receiving a spurious VERSIONS-like
1930 cell from a confused v1 client. Bugfix on 0.2.0.x.
1931 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
1932 introduction points for a hidden service have failed. Patch from
1933 Karsten Loesing. Bugfix on 0.2.0.x.
1935 o Code simplifications and refactoring:
1936 - Remove some needless generality from cpuworker code, for improved
1938 - Stop overloading the circuit_t.onionskin field for both "onionskin
1939 from a CREATE cell that we are waiting for a cpuworker to be
1940 assigned" and "onionskin from an EXTEND cell that we are going to
1941 send to an OR as soon as we are connected". Might help with bug 600.
1942 - Add an in-place version of aes_crypt() so that we can avoid doing a
1943 needless memcpy() call on each cell payload.
1946 Changes in version 0.2.0.18-alpha - 2008-01-25
1947 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
1948 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
1949 that can warn or reject connections to ports generally associated with
1950 vulnerable-plaintext protocols.
1952 o New directory authorities:
1953 - Set up dannenberg (run by CCC) as the sixth v3 directory
1957 - Fix a major memory leak when attempting to use the v2 TLS
1958 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
1959 - We accidentally enabled the under-development v2 TLS handshake
1960 code, which was causing log entries like "TLS error while
1961 renegotiating handshake". Disable it again. Resolves bug 590.
1962 - We were computing the wrong Content-Length: header for directory
1963 responses that need to be compressed on the fly, causing clients
1964 asking for those items to always fail. Bugfix on 0.2.0.x; partially
1968 - Avoid going directly to the directory authorities even if you're a
1969 relay, if you haven't found yourself reachable yet or if you've
1970 decided not to advertise your dirport yet. Addresses bug 556.
1971 - If we've gone 12 hours since our last bandwidth check, and we
1972 estimate we have less than 50KB bandwidth capacity but we could
1973 handle more, do another bandwidth test.
1974 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
1975 Tor can warn and/or refuse connections to ports commonly used with
1976 vulnerable-plaintext protocols. Currently we warn on ports 23,
1977 109, 110, and 143, but we don't reject any.
1980 - When we setconf ClientOnly to 1, close any current OR and Dir
1981 listeners. Reported by mwenge.
1982 - When we get a consensus that's been signed by more people than
1983 we expect, don't log about it; it's not a big deal. Reported
1987 - Don't answer "/tor/networkstatus-bridges" directory requests if
1988 the request isn't encrypted.
1989 - Make "ClientOnly 1" config option disable directory ports too.
1990 - Patches from Karsten Loesing to make v2 hidden services more
1991 robust: work even when there aren't enough HSDir relays available;
1992 retry when a v2 rend desc fetch fails; but don't retry if we
1993 already have a usable v0 rend desc.
1996 Changes in version 0.2.0.17-alpha - 2008-01-17
1997 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
2000 - Make the tor-gencert man page get included correctly in the tarball.
2003 Changes in version 0.2.0.16-alpha - 2008-01-17
2004 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
2005 Loesing, and generally cleans up a lot of features and minor bugs.
2007 o New directory authorities:
2008 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
2011 o Major performance improvements:
2012 - Switch our old ring buffer implementation for one more like that
2013 used by free Unix kernels. The wasted space in a buffer with 1mb
2014 of data will now be more like 8k than 1mb. The new implementation
2015 also avoids realloc();realloc(); patterns that can contribute to
2016 memory fragmentation.
2019 - Configuration files now accept C-style strings as values. This
2020 helps encode characters not allowed in the current configuration
2021 file format, such as newline or #. Addresses bug 557.
2022 - Although we fixed bug 539 (where servers would send HTTP status 503
2023 responses _and_ send a body too), there are still servers out
2024 there that haven't upgraded. Therefore, make clients parse such
2025 bodies when they receive them.
2026 - When we're not serving v2 directory information, there is no reason
2027 to actually keep any around. Remove the obsolete files and directory
2028 on startup if they are very old and we aren't going to serve them.
2030 o Minor performance improvements:
2031 - Reference-count and share copies of address policy entries; only 5%
2032 of them were actually distinct.
2033 - Never walk through the list of logs if we know that no log is
2034 interested in a given message.
2037 - When an authority has not signed a consensus, do not try to
2038 download a nonexistent "certificate with key 00000000". Bugfix
2039 on 0.2.0.x. Fixes bug 569.
2040 - Fix a rare assert error when we're closing one of our threads:
2041 use a mutex to protect the list of logs, so we never write to the
2042 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
2043 bug 575, which is kind of the revenge of bug 222.
2044 - Patch from Karsten Loesing to complain less at both the client
2045 and the relay when a relay used to have the HSDir flag but doesn't
2046 anymore, and we try to upload a hidden service descriptor.
2047 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
2049 - Do not try to download missing certificates until we have tried
2050 to check our fallback consensus. Fixes bug 583.
2051 - Make bridges round reported GeoIP stats info up to the nearest
2052 estimate, not down. Now we can distinguish between "0 people from
2053 this country" and "1 person from this country".
2054 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
2055 - Avoid possible segfault if key generation fails in
2056 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
2057 - Avoid segfault in the case where a badly behaved v2 versioning
2058 directory sends a signed networkstatus with missing client-versions.
2060 - Avoid segfaults on certain complex invocations of
2061 router_get_by_hexdigest(). Bugfix on 0.1.2.
2062 - Correct bad index on array access in parse_http_time(). Bugfix
2064 - Fix possible bug in vote generation when server versions are present
2065 but client versions are not.
2066 - Fix rare bug on REDIRECTSTREAM control command when called with no
2067 port set: it could erroneously report an error when none had
2069 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
2070 compressing large objects and find ourselves with more than 4k
2071 left over. Bugfix on 0.2.0.
2072 - Fix a small memory leak when setting up a hidden service.
2073 - Fix a few memory leaks that could in theory happen under bizarre
2075 - Fix an assert if we post a general-purpose descriptor via the
2076 control port but that descriptor isn't mentioned in our current
2077 network consensus. Bug reported by Jon McLachlan; bugfix on
2080 o Minor features (controller):
2081 - Get NS events working again. Patch from tup.
2082 - The GETCONF command now escapes and quotes configuration values
2083 that don't otherwise fit into the torrc file.
2084 - The SETCONF command now handles quoted values correctly.
2086 o Minor features (directory authorities):
2087 - New configuration options to override default maximum number of
2088 servers allowed on a single IP address. This is important for
2089 running a test network on a single host.
2090 - Actually implement the -s option to tor-gencert.
2091 - Add a manual page for tor-gencert.
2093 o Minor features (bridges):
2094 - Bridge authorities no longer serve bridge descriptors over
2095 unencrypted connections.
2097 o Minor features (other):
2098 - Add hidden services and DNSPorts to the list of things that make
2099 Tor accept that it has running ports. Change starting Tor with no
2100 ports from a fatal error to a warning; we might change it back if
2101 this turns out to confuse anybody. Fixes bug 579.
2104 Changes in version 0.1.2.19 - 2008-01-17
2105 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
2106 exit policy a little bit more conservative so it's safer to run an
2107 exit relay on a home system, and fixes a variety of smaller issues.
2110 - Exit policies now reject connections that are addressed to a
2111 relay's public (external) IP address too, unless
2112 ExitPolicyRejectPrivate is turned off. We do this because too
2113 many relays are running nearby to services that trust them based
2117 - When the clock jumps forward a lot, do not allow the bandwidth
2118 buckets to become negative. Fixes bug 544.
2119 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2120 on every successful resolve. Reported by Mike Perry.
2121 - Purge old entries from the "rephist" database and the hidden
2122 service descriptor database even when DirPort is zero.
2123 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
2124 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
2125 crashing or mis-answering these requests.
2126 - When we decide to send a 503 response to a request for servers, do
2127 not then also send the server descriptors: this defeats the whole
2128 purpose. Fixes bug 539.
2131 - Changing the ExitPolicyRejectPrivate setting should cause us to
2132 rebuild our server descriptor.
2133 - Fix handling of hex nicknames when answering controller requests for
2134 networkstatus by name, or when deciding whether to warn about
2135 unknown routers in a config option. (Patch from mwenge.)
2136 - Fix a couple of hard-to-trigger autoconf problems that could result
2137 in really weird results on platforms whose sys/types.h files define
2138 nonstandard integer types.
2139 - Don't try to create the datadir when running --verify-config or
2140 --hash-password. Resolves bug 540.
2141 - If we were having problems getting a particular descriptor from the
2142 directory caches, and then we learned about a new descriptor for
2143 that router, we weren't resetting our failure count. Reported
2145 - Although we fixed bug 539 (where servers would send HTTP status 503
2146 responses _and_ send a body too), there are still servers out there
2147 that haven't upgraded. Therefore, make clients parse such bodies
2148 when they receive them.
2149 - Run correctly on systems where rlim_t is larger than unsigned long.
2150 This includes some 64-bit systems.
2151 - Run correctly on platforms (like some versions of OS X 10.5) where
2152 the real limit for number of open files is OPEN_FILES, not rlim_max
2153 from getrlimit(RLIMIT_NOFILES).
2154 - Avoid a spurious free on base64 failure.
2155 - Avoid segfaults on certain complex invocations of
2156 router_get_by_hexdigest().
2157 - Fix rare bug on REDIRECTSTREAM control command when called with no
2158 port set: it could erroneously report an error when none had
2162 Changes in version 0.2.0.15-alpha - 2007-12-25
2163 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
2164 features added in 0.2.0.13-alpha.
2167 - Fix several remotely triggerable asserts based on DirPort requests
2168 for a v2 or v3 networkstatus object before we were prepared. This
2169 was particularly bad for 0.2.0.13 and later bridge relays, who
2170 would never have a v2 networkstatus and would thus always crash
2171 when used. Bugfixes on 0.2.0.x.
2172 - Estimate the v3 networkstatus size more accurately, rather than
2173 estimating it at zero bytes and giving it artificially high priority
2174 compared to other directory requests. Bugfix on 0.2.0.x.
2177 - Fix configure.in logic for cross-compilation.
2178 - When we load a bridge descriptor from the cache, and it was
2179 previously unreachable, mark it as retriable so we won't just
2180 ignore it. Also, try fetching a new copy immediately. Bugfixes
2182 - The bridge GeoIP stats were counting other relays, for example
2183 self-reachability and authority-reachability tests.
2186 - Support compilation to target iPhone; patch from cjacker huang.
2187 To build for iPhone, pass the --enable-iphone option to configure.
2190 Changes in version 0.2.0.14-alpha - 2007-12-23
2192 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
2193 without a datadirectory from a previous Tor install. Reported
2195 - Fix a crash when we fetch a descriptor that turns out to be
2196 unexpected (it used to be in our networkstatus when we started
2197 fetching it, but it isn't in our current networkstatus), and we
2198 aren't using bridges. Bugfix on 0.2.0.x.
2199 - Fix a crash when accessing hidden services: it would work the first
2200 time you use a given introduction point for your service, but
2201 on subsequent requests we'd be using garbage memory. Fixed by
2202 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
2203 - Fix a crash when we load a bridge descriptor from disk but we don't
2204 currently have a Bridge line for it in our torrc. Bugfix on
2208 - If bridge authorities set BridgePassword, they will serve a
2209 snapshot of known bridge routerstatuses from their DirPort to
2210 anybody who knows that password. Unset by default.
2213 - Make the unit tests build again.
2214 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
2215 - Make PublishServerDescriptor default to 1, so the default doesn't
2216 have to change as we invent new directory protocol versions.
2217 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
2218 be included unless sys/time.h is already included. Fixes
2219 bug 553. Bugfix on 0.2.0.x.
2220 - If we receive a general-purpose descriptor and then receive an
2221 identical bridge-purpose descriptor soon after, don't discard
2222 the next one as a duplicate.
2225 - If BridgeRelay is set to 1, then the default for
2226 PublishServerDescriptor is now "bridge" rather than "v2,v3".
2227 - If the user sets RelayBandwidthRate but doesn't set
2228 RelayBandwidthBurst, then make them equal rather than erroring out.
2231 Changes in version 0.2.0.13-alpha - 2007-12-21
2232 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
2233 Goodell, fixes many more bugs, and adds a lot of infrastructure for
2236 o New directory authorities:
2237 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
2241 - Only update guard status (usable / not usable) once we have
2242 enough directory information. This was causing us to always pick
2243 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
2244 causing us to discard all our guards on startup if we hadn't been
2245 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
2246 - Purge old entries from the "rephist" database and the hidden
2247 service descriptor databases even when DirPort is zero. Bugfix
2249 - We were ignoring our RelayBandwidthRate for the first 30 seconds
2250 after opening a circuit -- even a relayed circuit. Bugfix on
2252 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
2253 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
2254 crashing or mis-answering these types of requests.
2255 - Relays were publishing their server descriptor to v1 and v2
2256 directory authorities, but they didn't try publishing to v3-only
2257 authorities. Fix this; and also stop publishing to v1 authorities.
2259 - When we were reading router descriptors from cache, we were ignoring
2260 the annotations -- so for example we were reading in bridge-purpose
2261 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
2262 - When we decided to send a 503 response to a request for servers, we
2263 were then also sending the server descriptors: this defeats the
2264 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
2267 - Bridge relays now behave like clients with respect to time
2268 intervals for downloading new consensus documents -- otherwise they
2269 stand out. Bridge users now wait until the end of the interval,
2270 so their bridge relay will be sure to have a new consensus document.
2271 - Three new config options (AlternateDirAuthority,
2272 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
2273 user selectively replace the default directory authorities by type,
2274 rather than the all-or-nothing replacement that DirServer offers.
2275 - Tor can now be configured to read a GeoIP file from disk in one
2276 of two formats. This can be used by controllers to map IP addresses
2277 to countries. Eventually, it may support exit-by-country.
2278 - When possible, bridge relays remember which countries users
2279 are coming from, and report aggregate information in their
2280 extra-info documents, so that the bridge authorities can learn
2281 where Tor is blocked.
2282 - Bridge directory authorities now do reachability testing on the
2283 bridges they know. They provide router status summaries to the
2284 controller via "getinfo ns/purpose/bridge", and also dump summaries
2285 to a file periodically.
2286 - Stop fetching directory info so aggressively if your DirPort is
2287 on but your ORPort is off; stop fetching v2 dir info entirely.
2288 You can override these choices with the new FetchDirInfoEarly
2292 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
2293 consensus documents when there are too many relays at a single
2294 IP address. Now clear it in v2 network status documents too, and
2295 also clear it in routerinfo_t when the relay is no longer listed
2296 in the relevant networkstatus document.
2297 - Don't crash if we get an unexpected value for the
2298 PublishServerDescriptor config option. Reported by Matt Edman;
2299 bugfix on 0.2.0.9-alpha.
2300 - Our new v2 hidden service descriptor format allows descriptors
2301 that have no introduction points. But Tor crashed when we tried
2302 to build a descriptor with no intro points (and it would have
2303 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
2305 - Fix building with dmalloc 5.5.2 with glibc.
2306 - Reject uploaded descriptors and extrainfo documents if they're
2307 huge. Otherwise we'll cache them all over the network and it'll
2308 clog everything up. Reported by Aljosha Judmayer.
2309 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
2310 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
2311 - When the DANGEROUS_VERSION controller status event told us we're
2312 running an obsolete version, it used the string "OLD" to describe
2313 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
2314 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
2315 - If we can't expand our list of entry guards (e.g. because we're
2316 using bridges or we have StrictEntryNodes set), don't mark relays
2317 down when they fail a directory request. Otherwise we're too quick
2318 to mark all our entry points down. Bugfix on 0.1.2.x.
2319 - Fix handling of hex nicknames when answering controller requests for
2320 networkstatus by name, or when deciding whether to warn about unknown
2321 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
2322 - Fix a couple of hard-to-trigger autoconf problems that could result
2323 in really weird results on platforms whose sys/types.h files define
2324 nonstandard integer types. Bugfix on 0.1.2.x.
2325 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
2326 - Don't crash on name lookup when we have no current consensus. Fixes
2327 bug 538; bugfix on 0.2.0.x.
2328 - Only Tors that want to mirror the v2 directory info should
2329 create the "cached-status" directory in their datadir. (All Tors
2330 used to create it.) Bugfix on 0.2.0.9-alpha.
2331 - Directory authorities should only automatically download Extra Info
2332 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
2335 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
2336 consumers. (We already do this on HUP.)
2337 - Authorities and caches fetch the v2 networkstatus documents
2338 less often, now that v3 is encouraged.
2339 - Add a new config option BridgeRelay that specifies you want to
2340 be a bridge relay. Right now the only difference is that it makes
2341 you answer begin_dir requests, and it makes you cache dir info,
2342 even if your DirPort isn't on.
2343 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
2344 ask about source, timestamp of arrival, purpose, etc. We need
2345 something like this to help Vidalia not do GeoIP lookups on bridge
2347 - Allow multiple HashedControlPassword config lines, to support
2348 multiple controller passwords.
2349 - Authorities now decide whether they're authoritative for a given
2350 router based on the router's purpose.
2351 - New config options AuthDirBadDir and AuthDirListBadDirs for
2352 authorities to mark certain relays as "bad directories" in the
2353 networkstatus documents. Also supports the "!baddir" directive in
2354 the approved-routers file.
2357 Changes in version 0.2.0.12-alpha - 2007-11-16
2358 This twelfth development snapshot fixes some more build problems as
2359 well as a few minor bugs.
2362 - Make it build on OpenBSD again. Patch from tup.
2363 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
2364 package-building for Red Hat, OS X, etc.
2366 o Minor bugfixes (on 0.1.2.x):
2367 - Changing the ExitPolicyRejectPrivate setting should cause us to
2368 rebuild our server descriptor.
2370 o Minor bugfixes (on 0.2.0.x):
2371 - When we're lacking a consensus, don't try to perform rendezvous
2372 operations. Reported by Karsten Loesing.
2373 - Fix a small memory leak whenever we decide against using a
2374 newly picked entry guard. Reported by Mike Perry.
2375 - When authorities detected more than two relays running on the same
2376 IP address, they were clearing all the status flags but forgetting
2377 to clear the "hsdir" flag. So clients were being told that a
2378 given relay was the right choice for a v2 hsdir lookup, yet they
2379 never had its descriptor because it was marked as 'not running'
2381 - If we're trying to fetch a bridge descriptor and there's no way
2382 the bridge authority could help us (for example, we don't know
2383 a digest, or there is no bridge authority), don't be so eager to
2384 fall back to asking the bridge authority.
2385 - If we're using bridges or have strictentrynodes set, and our
2386 chosen exit is in the same family as all our bridges/entry guards,
2387 then be flexible about families.
2390 - When we negotiate a v2 link-layer connection (not yet implemented),
2391 accept RELAY_EARLY cells and turn them into RELAY cells if we've
2392 negotiated a v1 connection for their next step. Initial code for
2396 Changes in version 0.2.0.11-alpha - 2007-11-12
2397 This eleventh development snapshot fixes some build problems with
2398 the previous snapshot. It also includes a more secure-by-default exit
2399 policy for relays, fixes an enormous memory leak for exit relays, and
2400 fixes another bug where servers were falling out of the directory list.
2403 - Exit policies now reject connections that are addressed to a
2404 relay's public (external) IP address too, unless
2405 ExitPolicyRejectPrivate is turned off. We do this because too
2406 many relays are running nearby to services that trust them based
2407 on network address. Bugfix on 0.1.2.x.
2410 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2411 on every successful resolve. Reported by Mike Perry; bugfix
2413 - On authorities, never downgrade to old router descriptors simply
2414 because they're listed in the consensus. This created a catch-22
2415 where we wouldn't list a new descriptor because there was an
2416 old one in the consensus, and we couldn't get the new one in the
2417 consensus because we wouldn't list it. Possible fix for bug 548.
2418 Also, this might cause bug 543 to appear on authorities; if so,
2419 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
2421 o Packaging fixes on 0.2.0.10-alpha:
2422 - We were including instructions about what to do with the
2423 src/config/fallback-consensus file, but we weren't actually
2424 including it in the tarball. Disable all of that for now.
2427 - Allow people to say PreferTunnelledDirConns rather than
2428 PreferTunneledDirConns, for those alternate-spellers out there.
2431 - Don't reevaluate all the information from our consensus document
2432 just because we've downloaded a v2 networkstatus that we intend
2433 to cache. Fixes bug 545; bugfix on 0.2.0.x.
2436 Changes in version 0.2.0.10-alpha - 2007-11-10
2437 This tenth development snapshot adds a third v3 directory authority
2438 run by Mike Perry, adds most of Karsten Loesing's new hidden service
2439 descriptor format, fixes a bad crash bug and new bridge bugs introduced
2440 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
2441 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
2442 addresses many more minor issues.
2444 o New directory authorities:
2445 - Set up ides (run by Mike Perry) as the third v3 directory authority.
2448 - Allow tunnelled directory connections to ask for an encrypted
2449 "begin_dir" connection or an anonymized "uses a full Tor circuit"
2450 connection independently. Now we can make anonymized begin_dir
2451 connections for (e.g.) more secure hidden service posting and
2453 - More progress on proposal 114: code from Karsten Loesing to
2454 implement new hidden service descriptor format.
2455 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
2456 accommodate the growing number of servers that use the default
2457 and are reaching it.
2458 - Directory authorities use a new formula for selecting which nodes
2459 to advertise as Guards: they must be in the top 7/8 in terms of
2460 how long we have known about them, and above the median of those
2461 nodes in terms of weighted fractional uptime.
2462 - Make "not enough dir info yet" warnings describe *why* Tor feels
2463 it doesn't have enough directory info yet.
2466 - Stop servers from crashing if they set a Family option (or
2467 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
2469 - Make bridge users work again -- the move to v3 directories in
2470 0.2.0.9-alpha had introduced a number of bugs that made bridges
2471 no longer work for clients.
2472 - When the clock jumps forward a lot, do not allow the bandwidth
2473 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
2475 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
2476 - When the consensus lists a router descriptor that we previously were
2477 mirroring, but that we considered non-canonical, reload the
2478 descriptor as canonical. This fixes bug 543 where Tor servers
2479 would start complaining after a few days that they don't have
2480 enough directory information to build a circuit.
2481 - Consider replacing the current consensus when certificates arrive
2482 that make the pending consensus valid. Previously, we were only
2483 considering replacement when the new certs _didn't_ help.
2484 - Fix an assert error on startup if we didn't already have the
2485 consensus and certs cached in our datadirectory: we were caching
2486 the consensus in consensus_waiting_for_certs but then free'ing it
2488 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
2489 Request) if we need more v3 certs but we've already got pending
2490 requests for all of them.
2491 - Correctly back off from failing certificate downloads. Fixes
2493 - Authorities don't vote on the Running flag if they have been running
2494 for less than 30 minutes themselves. Fixes bug 547, where a newly
2495 started authority would vote that everyone was down.
2498 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
2499 it, it had no AES, and it hasn't seen any security patches since
2503 - Clients now hold circuitless TLS connections open for 1.5 times
2504 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
2505 rebuild a new circuit over them within that timeframe. Previously,
2506 they held them open only for KeepalivePeriod (5 minutes).
2507 - Use "If-Modified-Since" to avoid retrieving consensus
2508 networkstatuses that we already have.
2509 - When we have no consensus, check FallbackNetworkstatusFile (defaults
2510 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
2511 we start knowing some directory caches.
2512 - When we receive a consensus from the future, warn about skew.
2513 - Improve skew reporting: try to give the user a better log message
2514 about how skewed they are, and how much this matters.
2515 - When we have a certificate for an authority, believe that
2516 certificate's claims about the authority's IP address.
2517 - New --quiet command-line option to suppress the default console log.
2518 Good in combination with --hash-password.
2519 - Authorities send back an X-Descriptor-Not-New header in response to
2520 an accepted-but-discarded descriptor upload. Partially implements
2522 - Make the log message for "tls error. breaking." more useful.
2523 - Better log messages about certificate downloads, to attempt to
2524 track down the second incarnation of bug 546.
2526 o Minor features (bridges):
2527 - If bridge users set UpdateBridgesFromAuthority, but the digest
2528 they ask for is a 404 from the bridge authority, they now fall
2529 back to trying the bridge directly.
2530 - Bridges now use begin_dir to publish their server descriptor to
2531 the bridge authority, even when they haven't set TunnelDirConns.
2533 o Minor features (controller):
2534 - When reporting clock skew, and we know that the clock is _at least
2535 as skewed_ as some value, but we don't know the actual value,
2536 report the value as a "minimum skew."
2539 - Update linux-tor-prio.sh script to allow QoS based on the uid of
2540 the Tor process. Patch from Marco Bonetti with tweaks from Mike
2544 - Refuse to start if both ORPort and UseBridges are set. Bugfix
2545 on 0.2.0.x, suggested by Matt Edman.
2546 - Don't stop fetching descriptors when FetchUselessDescriptors is
2547 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
2548 reported by tup and ioerror.
2549 - Better log message on vote from unknown authority.
2550 - Don't log "Launching 0 request for 0 router" message.
2552 o Minor bugfixes (memory leaks):
2553 - Stop leaking memory every time we parse a v3 certificate. Bugfix
2555 - Stop leaking memory every time we load a v3 certificate. Bugfix
2556 on 0.2.0.1-alpha. Fixes bug 536.
2557 - Stop leaking a cached networkstatus on exit. Bugfix on
2559 - Stop leaking voter information every time we free a consensus.
2560 Bugfix on 0.2.0.3-alpha.
2561 - Stop leaking signed data every time we check a voter signature.
2562 Bugfix on 0.2.0.3-alpha.
2563 - Stop leaking a signature every time we fail to parse a consensus or
2564 a vote. Bugfix on 0.2.0.3-alpha.
2565 - Stop leaking v2_download_status_map on shutdown. Bugfix on
2567 - Stop leaking conn->nickname every time we make a connection to a
2568 Tor relay without knowing its expected identity digest (e.g. when
2569 using bridges). Bugfix on 0.2.0.3-alpha.
2571 - Minor bugfixes (portability):
2572 - Run correctly on platforms where rlim_t is larger than unsigned
2573 long, and/or where the real limit for number of open files is
2574 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
2575 particular, these may be needed for OS X 10.5.
2578 Changes in version 0.1.2.18 - 2007-10-28
2579 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
2580 hidden service introduction that were causing huge delays, and a big
2581 bug that was causing some servers to disappear from the network status
2582 lists for a few hours each day.
2584 o Major bugfixes (crashes):
2585 - If a connection is shut down abruptly because of something that
2586 happened inside connection_flushed_some(), do not call
2587 connection_finished_flushing(). Should fix bug 451:
2588 "connection_stop_writing: Assertion conn->write_event failed"
2589 Bugfix on 0.1.2.7-alpha.
2590 - Fix possible segfaults in functions called from
2591 rend_process_relay_cell().
2593 o Major bugfixes (hidden services):
2594 - Hidden services were choosing introduction points uniquely by
2595 hexdigest, but when constructing the hidden service descriptor
2596 they merely wrote the (potentially ambiguous) nickname.
2597 - Clients now use the v2 intro format for hidden service
2598 connections: they specify their chosen rendezvous point by identity
2599 digest rather than by (potentially ambiguous) nickname. These
2600 changes could speed up hidden service connections dramatically.
2602 o Major bugfixes (other):
2603 - Stop publishing a new server descriptor just because we get a
2604 HUP signal. This led (in a roundabout way) to some servers getting
2605 dropped from the networkstatus lists for a few hours each day.
2606 - When looking for a circuit to cannibalize, consider family as well
2607 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
2608 circuit cannibalization).
2609 - When a router wasn't listed in a new networkstatus, we were leaving
2610 the flags for that router alone -- meaning it remained Named,
2611 Running, etc -- even though absence from the networkstatus means
2612 that it shouldn't be considered to exist at all anymore. Now we
2613 clear all the flags for routers that fall out of the networkstatus
2614 consensus. Fixes bug 529.
2617 - Don't try to access (or alter) the state file when running
2618 --list-fingerprint or --verify-config or --hash-password. Resolves
2620 - When generating information telling us how to extend to a given
2621 router, do not try to include the nickname if it is
2622 absent. Resolves bug 467.
2623 - Fix a user-triggerable segfault in expand_filename(). (There isn't
2624 a way to trigger this remotely.)
2625 - When sending a status event to the controller telling it that an
2626 OR address is reachable, set the port correctly. (Previously we
2627 were reporting the dir port.)
2628 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
2629 command. Bugfix on 0.1.2.17.
2630 - When loading bandwidth history, do not believe any information in
2631 the future. Fixes bug 434.
2632 - When loading entry guard information, do not believe any information
2634 - When we have our clock set far in the future and generate an
2635 onion key, then re-set our clock to be correct, we should not stop
2636 the onion key from getting rotated.
2637 - On some platforms, accept() can return a broken address. Detect
2638 this more quietly, and deal accordingly. Fixes bug 483.
2639 - It's not actually an error to find a non-pending entry in the DNS
2640 cache when canceling a pending resolve. Don't log unless stuff
2641 is fishy. Resolves bug 463.
2642 - Don't reset trusted dir server list when we set a configuration
2643 option. Patch from Robert Hogan.
2644 - Don't try to create the datadir when running --verify-config or
2645 --hash-password. Resolves bug 540.
2648 Changes in version 0.2.0.9-alpha - 2007-10-24
2649 This ninth development snapshot switches clients to the new v3 directory
2650 system; allows servers to be listed in the network status even when they
2651 have the same nickname as a registered server; and fixes many other
2652 bugs including a big one that was causing some servers to disappear
2653 from the network status lists for a few hours each day.
2655 o Major features (directory system):
2656 - Clients now download v3 consensus networkstatus documents instead
2657 of v2 networkstatus documents. Clients and caches now base their
2658 opinions about routers on these consensus documents. Clients only
2659 download router descriptors listed in the consensus.
2660 - Authorities now list servers who have the same nickname as
2661 a different named server, but list them with a new flag,
2662 "Unnamed". Now we can list servers that happen to pick the same
2663 nickname as a server that registered two years ago and then
2664 disappeared. Partially implements proposal 122.
2665 - If the consensus lists a router as "Unnamed", the name is assigned
2666 to a different router: do not identify the router by that name.
2667 Partially implements proposal 122.
2668 - Authorities can now come to a consensus on which method to use to
2669 compute the consensus. This gives us forward compatibility.
2672 - Stop publishing a new server descriptor just because we HUP or
2673 when we find our DirPort to be reachable but won't actually publish
2674 it. New descriptors without any real changes are dropped by the
2675 authorities, and can screw up our "publish every 18 hours" schedule.
2677 - When a router wasn't listed in a new networkstatus, we were leaving
2678 the flags for that router alone -- meaning it remained Named,
2679 Running, etc -- even though absence from the networkstatus means
2680 that it shouldn't be considered to exist at all anymore. Now we
2681 clear all the flags for routers that fall out of the networkstatus
2682 consensus. Fixes bug 529; bugfix on 0.1.2.x.
2683 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
2684 extrainfo documents and then discard them immediately for not
2685 matching the latest router. Bugfix on 0.2.0.1-alpha.
2687 o Minor features (v3 directory protocol):
2688 - Allow tor-gencert to generate a new certificate without replacing
2690 - Allow certificates to include an address.
2691 - When we change our directory-cache settings, reschedule all voting
2692 and download operations.
2693 - Reattempt certificate downloads immediately on failure, as long as
2694 we haven't failed a threshold number of times yet.
2695 - Delay retrying consensus downloads while we're downloading
2696 certificates to verify the one we just got. Also, count getting a
2697 consensus that we already have (or one that isn't valid) as a failure,
2698 and count failing to get the certificates after 20 minutes as a
2700 - Build circuits and download descriptors even if our consensus is a
2701 little expired. (This feature will go away once authorities are
2704 o Minor features (router descriptor cache):
2705 - If we find a cached-routers file that's been sitting around for more
2706 than 28 days unmodified, then most likely it's a leftover from
2707 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
2709 - When we (as a cache) download a descriptor because it was listed
2710 in a consensus, remember when the consensus was supposed to expire,
2711 and don't expire the descriptor until then.
2713 o Minor features (performance):
2714 - Call routerlist_remove_old_routers() much less often. This should
2715 speed startup, especially on directory caches.
2716 - Don't try to launch new descriptor downloads quite so often when we
2717 already have enough directory information to build circuits.
2718 - Base64 decoding was actually showing up on our profile when parsing
2719 the initial descriptor file; switch to an in-process all-at-once
2720 implementation that's about 3.5x times faster than calling out to
2723 o Minor features (compilation):
2724 - Detect non-ASCII platforms (if any still exist) and refuse to
2725 build there: some of our code assumes that 'A' is 65 and so on.
2727 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
2728 - Make the "next period" votes into "current period" votes immediately
2729 after publishing the consensus; avoid a heisenbug that made them
2730 stick around indefinitely.
2731 - When we discard a vote as a duplicate, do not report this as
2733 - Treat missing v3 keys or certificates as an error when running as a
2734 v3 directory authority.
2735 - When we're configured to be a v3 authority, but we're only listed
2736 as a non-v3 authority in our DirServer line for ourself, correct
2738 - If an authority doesn't have a qualified hostname, just put
2739 its address in the vote. This fixes the problem where we referred to
2740 "moria on moria:9031."
2741 - Distinguish between detached signatures for the wrong period, and
2742 detached signatures for a divergent vote.
2743 - Fix a small memory leak when computing a consensus.
2744 - When there's no concensus, we were forming a vote every 30
2745 minutes, but writing the "valid-after" line in our vote based
2746 on our configured V3AuthVotingInterval: so unless the intervals
2747 matched up, we immediately rejected our own vote because it didn't
2748 start at the voting interval that caused us to construct a vote.
2750 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
2751 - Delete unverified-consensus when the real consensus is set.
2752 - Consider retrying a consensus networkstatus fetch immediately
2753 after one fails: don't wait 60 seconds to notice.
2754 - When fetching a consensus as a cache, wait until a newer consensus
2755 should exist before trying to replace the current one.
2756 - Use a more forgiving schedule for retrying failed consensus
2757 downloads than for other types.
2759 o Minor bugfixes (other directory issues):
2760 - Correct the implementation of "download votes by digest." Bugfix on
2762 - Authorities no longer send back "400 you're unreachable please fix
2763 it" errors to Tor servers that aren't online all the time. We're
2764 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
2766 o Minor bugfixes (controller):
2767 - Don't reset trusted dir server list when we set a configuration
2768 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
2769 - Respond to INT and TERM SIGNAL commands before we execute the
2770 signal, in case the signal shuts us down. We had a patch in
2771 0.1.2.1-alpha that tried to do this by queueing the response on
2772 the connection's buffer before shutting down, but that really
2773 isn't the same thing at all. Bug located by Matt Edman.
2775 o Minor bugfixes (misc):
2776 - Correctly check for bad options to the "PublishServerDescriptor"
2777 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
2778 - Stop leaking memory on failing case of base32_decode, and make
2779 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
2780 - Don't try to download extrainfo documents when we're trying to
2781 fetch enough directory info to build a circuit: having enough
2782 info should get priority. Bugfix on 0.2.0.x.
2783 - Don't complain that "your server has not managed to confirm that its
2784 ports are reachable" if we haven't been able to build any circuits
2785 yet. Bug found by spending four hours without a v3 consensus. Bugfix
2787 - Detect the reason for failing to mmap a descriptor file we just
2788 wrote, and give a more useful log message. Fixes bug 533. Bugfix
2791 o Code simplifications and refactoring:
2792 - Remove support for the old bw_accounting file: we've been storing
2793 bandwidth accounting information in the state file since
2794 0.1.2.5-alpha. This may result in bandwidth accounting errors
2795 if you try to upgrade from 0.1.1.x or earlier, or if you try to
2796 downgrade to 0.1.1.x or earlier.
2797 - New convenience code to locate a file within the DataDirectory.
2798 - Move non-authority functionality out of dirvote.c.
2799 - Refactor the arguments for router_pick_{directory_|trusteddir}server
2800 so that they all take the same named flags.
2803 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
2804 Unix users an easy way to script their Tor process (e.g. by
2805 adjusting bandwidth based on the time of the day).
2808 Changes in version 0.2.0.8-alpha - 2007-10-12
2809 This eighth development snapshot fixes a crash bug that's been bothering
2810 us since February 2007, lets bridge authorities store a list of bridge
2811 descriptors they've seen, gets v3 directory voting closer to working,
2812 starts caching v3 directory consensus documents on directory mirrors,
2813 and fixes a variety of smaller issues including some minor memory leaks.
2815 o Major features (router descriptor cache):
2816 - Store routers in a file called cached-descriptors instead of in
2817 cached-routers. Initialize cached-descriptors from cached-routers
2818 if the old format is around. The new format allows us to store
2819 annotations along with descriptors.
2820 - Use annotations to record the time we received each descriptor, its
2821 source, and its purpose.
2822 - Disable the SETROUTERPURPOSE controller command: it is now
2824 - Controllers should now specify cache=no or cache=yes when using
2825 the +POSTDESCRIPTOR command.
2826 - Bridge authorities now write bridge descriptors to disk, meaning
2827 we can export them to other programs and begin distributing them
2830 o Major features (directory authorities):
2831 - When a v3 authority is missing votes or signatures, it now tries
2833 - Directory authorities track weighted fractional uptime as well as
2834 weighted mean-time-between failures. WFU is suitable for deciding
2835 whether a node is "usually up", while MTBF is suitable for deciding
2836 whether a node is "likely to stay up." We need both, because
2837 "usually up" is a good requirement for guards, while "likely to
2838 stay up" is a good requirement for long-lived connections.
2840 o Major features (v3 directory system):
2841 - Caches now download v3 network status documents as needed,
2842 and download the descriptors listed in them.
2843 - All hosts now attempt to download and keep fresh v3 authority
2844 certificates, and re-attempt after failures.
2845 - More internal-consistency checks for vote parsing.
2847 o Major bugfixes (crashes):
2848 - If a connection is shut down abruptly because of something that
2849 happened inside connection_flushed_some(), do not call
2850 connection_finished_flushing(). Should fix bug 451. Bugfix on
2853 o Major bugfixes (performance):
2854 - Fix really bad O(n^2) performance when parsing a long list of
2855 routers: Instead of searching the entire list for an "extra-info "
2856 string which usually wasn't there, once for every routerinfo
2857 we read, just scan lines forward until we find one we like.
2859 - When we add data to a write buffer in response to the data on that
2860 write buffer getting low because of a flush, do not consider the
2861 newly added data as a candidate for immediate flushing, but rather
2862 make it wait until the next round of writing. Otherwise, we flush
2863 and refill recursively, and a single greedy TLS connection can
2864 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
2866 o Minor features (v3 authority system):
2867 - Add more ways for tools to download the votes that lead to the
2869 - Send a 503 when low on bandwidth and a vote, consensus, or
2870 certificate is requested.
2871 - If-modified-since is now implemented properly for all kinds of
2872 certificate requests.
2874 o Minor bugfixes (network statuses):
2875 - Tweak the implementation of proposal 109 slightly: allow at most
2876 two Tor servers on the same IP address, except if it's the location
2877 of a directory authority, in which case allow five. Bugfix on
2880 o Minor bugfixes (controller):
2881 - When sending a status event to the controller telling it that an
2882 OR address is reachable, set the port correctly. (Previously we
2883 were reporting the dir port.) Bugfix on 0.1.2.x.
2885 o Minor bugfixes (v3 directory system):
2886 - Fix logic to look up a cert by its signing key digest. Bugfix on
2888 - Only change the reply to a vote to "OK" if it's not already
2889 set. This gets rid of annoying "400 OK" log messages, which may
2890 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
2891 - When we get a valid consensus, recompute the voting schedule.
2892 - Base the valid-after time of a vote on the consensus voting
2893 schedule, not on our preferred schedule.
2894 - Make the return values and messages from signature uploads and
2895 downloads more sensible.
2896 - Fix a memory leak when serving votes and consensus documents, and
2897 another when serving certificates.
2899 o Minor bugfixes (performance):
2900 - Use a slightly simpler string hashing algorithm (copying Python's
2901 instead of Java's) and optimize our digest hashing algorithm to take
2902 advantage of 64-bit platforms and to remove some possibly-costly
2904 - Fix a minor memory leak whenever we parse guards from our state
2905 file. Bugfix on 0.2.0.7-alpha.
2906 - Fix a minor memory leak whenever we write out a file. Bugfix on
2908 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
2909 command. Bugfix on 0.2.0.5-alpha.
2911 o Minor bugfixes (portability):
2912 - On some platforms, accept() can return a broken address. Detect
2913 this more quietly, and deal accordingly. Fixes bug 483.
2914 - Stop calling tor_strlower() on uninitialized memory in some cases.
2915 Bugfix in 0.2.0.7-alpha.
2917 o Minor bugfixes (usability):
2918 - Treat some 403 responses from directory servers as INFO rather than
2919 WARN-severity events.
2920 - It's not actually an error to find a non-pending entry in the DNS
2921 cache when canceling a pending resolve. Don't log unless stuff is
2922 fishy. Resolves bug 463.
2924 o Minor bugfixes (anonymity):
2925 - Never report that we've used more bandwidth than we're willing to
2926 relay: it leaks how much non-relay traffic we're using. Resolves
2928 - When looking for a circuit to cannibalize, consider family as well
2929 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
2930 circuit cannibalization).
2932 o Code simplifications and refactoring:
2933 - Make a bunch of functions static. Remove some dead code.
2934 - Pull out about a third of the really big routerlist.c; put it in a
2935 new module, networkstatus.c.
2936 - Merge the extra fields in local_routerstatus_t back into
2937 routerstatus_t: we used to need one routerstatus_t for each
2938 authority's opinion, plus a local_routerstatus_t for the locally
2939 computed consensus opinion. To save space, we put the locally
2940 modified fields into local_routerstatus_t, and only the common
2941 stuff into routerstatus_t. But once v3 directories are in use,
2942 clients and caches will no longer need to hold authority opinions;
2943 thus, the rationale for keeping the types separate is now gone.
2944 - Make the code used to reschedule and reattempt downloads more
2946 - Turn all 'Are we a directory server/mirror?' logic into a call to
2948 - Remove the code to generate the oldest (v1) directory format.
2949 The code has been disabled since 0.2.0.5-alpha.
2952 Changes in version 0.2.0.7-alpha - 2007-09-21
2953 This seventh development snapshot makes bridges work again, makes bridge
2954 authorities work for the first time, fixes two huge performance flaws
2955 in hidden services, and fixes a variety of minor issues.
2957 o New directory authorities:
2958 - Set up moria1 and tor26 as the first v3 directory authorities. See
2959 doc/spec/dir-spec.txt for details on the new directory design.
2961 o Major bugfixes (crashes):
2962 - Fix possible segfaults in functions called from
2963 rend_process_relay_cell(). Bugfix on 0.1.2.x.
2965 o Major bugfixes (bridges):
2966 - Fix a bug that made servers send a "404 Not found" in response to
2967 attempts to fetch their server descriptor. This caused Tor servers
2968 to take many minutes to establish reachability for their DirPort,
2969 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
2970 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
2971 users configure that and specify a bridge with an identity
2972 fingerprint, now they will lookup the bridge descriptor at the
2973 default bridge authority via a one-hop tunnel, but once circuits
2974 are established they will switch to a three-hop tunnel for later
2975 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
2977 o Major bugfixes (hidden services):
2978 - Hidden services were choosing introduction points uniquely by
2979 hexdigest, but when constructing the hidden service descriptor
2980 they merely wrote the (potentially ambiguous) nickname.
2981 - Clients now use the v2 intro format for hidden service
2982 connections: they specify their chosen rendezvous point by identity
2983 digest rather than by (potentially ambiguous) nickname. Both
2984 are bugfixes on 0.1.2.x, and they could speed up hidden service
2985 connections dramatically. Thanks to Karsten Loesing.
2987 o Minor features (security):
2988 - As a client, do not believe any server that tells us that an
2989 address maps to an internal address space.
2990 - Make it possible to enable HashedControlPassword and
2991 CookieAuthentication at the same time.
2993 o Minor features (guard nodes):
2994 - Tag every guard node in our state file with the version that
2995 we believe added it, or with our own version if we add it. This way,
2996 if a user temporarily runs an old version of Tor and then switches
2997 back to a new one, she doesn't automatically lose her guards.
2999 o Minor features (speed):
3000 - When implementing AES counter mode, update only the portions of the
3001 counter buffer that need to change, and don't keep separate
3002 network-order and host-order counters when they are the same (i.e.,
3003 on big-endian hosts.)
3005 o Minor features (controller):
3006 - Accept LF instead of CRLF on controller, since some software has a
3007 hard time generating real Internet newlines.
3008 - Add GETINFO values for the server status events
3009 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
3013 - Routers no longer include bandwidth-history lines in their
3014 descriptors; this information is already available in extra-info
3015 documents, and including it in router descriptors took up 60%
3016 (!) of compressed router descriptor downloads. Completes
3017 implementation of proposal 104.
3018 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
3019 and TorControl.py, as they use the old v0 controller protocol,
3020 and are obsoleted by TorFlow anyway.
3021 - Drop support for v1 rendezvous descriptors, since we never used
3022 them anyway, and the code has probably rotted by now. Based on
3023 patch from Karsten Loesing.
3024 - On OSX, stop warning the user that kqueue support in libevent is
3025 "experimental", since it seems to have worked fine for ages.
3028 - When generating information telling us how to extend to a given
3029 router, do not try to include the nickname if it is absent. Fixes
3030 bug 467. Bugfix on 0.2.0.3-alpha.
3031 - Fix a user-triggerable (but not remotely-triggerable) segfault
3032 in expand_filename(). Bugfix on 0.1.2.x.
3033 - Fix a memory leak when freeing incomplete requests from DNSPort.
3034 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
3035 - Don't try to access (or alter) the state file when running
3036 --list-fingerprint or --verify-config or --hash-password. (Resolves
3037 bug 499.) Bugfix on 0.1.2.x.
3038 - Servers used to decline to publish their DirPort if their
3039 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
3040 were below a threshold. Now they only look at BandwidthRate and
3041 RelayBandwidthRate. Bugfix on 0.1.2.x.
3042 - Remove an optimization in the AES counter-mode code that assumed
3043 that the counter never exceeded 2^68. When the counter can be set
3044 arbitrarily as an IV (as it is by Karsten's new hidden services
3045 code), this assumption no longer holds. Bugfix on 0.1.2.x.
3046 - Resume listing "AUTHORITY" flag for authorities in network status.
3047 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
3049 o Code simplifications and refactoring:
3050 - Revamp file-writing logic so we don't need to have the entire
3051 contents of a file in memory at once before we write to disk. Tor,
3053 - Turn "descriptor store" into a full-fledged type.
3054 - Move all NT services code into a separate source file.
3055 - Unify all code that computes medians, percentile elements, etc.
3056 - Get rid of a needless malloc when parsing address policies.
3059 Changes in version 0.1.2.17 - 2007-08-30
3060 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
3061 X bundles. Vidalia 0.0.14 makes authentication required for the
3062 ControlPort in the default configuration, which addresses important
3063 security risks. Everybody who uses Vidalia (or another controller)
3066 In addition, this Tor update fixes major load balancing problems with
3067 path selection, which should speed things up a lot once many people
3070 o Major bugfixes (security):
3071 - We removed support for the old (v0) control protocol. It has been
3072 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
3073 become more of a headache than it's worth.
3075 o Major bugfixes (load balancing):
3076 - When choosing nodes for non-guard positions, weight guards
3077 proportionally less, since they already have enough load. Patch
3079 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
3080 will allow fast Tor servers to get more attention.
3081 - When we're upgrading from an old Tor version, forget our current
3082 guards and pick new ones according to the new weightings. These
3083 three load balancing patches could raise effective network capacity
3084 by a factor of four. Thanks to Mike Perry for measurements.
3086 o Major bugfixes (stream expiration):
3087 - Expire not-yet-successful application streams in all cases if
3088 they've been around longer than SocksTimeout. Right now there are
3089 some cases where the stream will live forever, demanding a new
3090 circuit every 15 seconds. Fixes bug 454; reported by lodger.
3092 o Minor features (controller):
3093 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
3094 is valid before any authentication has been received. It tells
3095 a controller what kind of authentication is expected, and what
3096 protocol is spoken. Implements proposal 119.
3098 o Minor bugfixes (performance):
3099 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
3100 greatly speeding up loading cached-routers from disk on startup.
3101 - Disable sentinel-based debugging for buffer code: we squashed all
3102 the bugs that this was supposed to detect a long time ago, and now
3103 its only effect is to change our buffer sizes from nice powers of
3104 two (which platform mallocs tend to like) to values slightly over
3105 powers of two (which make some platform mallocs sad).
3107 o Minor bugfixes (misc):
3108 - If exit bandwidth ever exceeds one third of total bandwidth, then
3109 use the correct formula to weight exit nodes when choosing paths.
3110 Based on patch from Mike Perry.
3111 - Choose perfectly fairly among routers when choosing by bandwidth and
3112 weighting by fraction of bandwidth provided by exits. Previously, we
3113 would choose with only approximate fairness, and correct ourselves
3114 if we ran off the end of the list.
3115 - If we require CookieAuthentication but we fail to write the
3116 cookie file, we would warn but not exit, and end up in a state
3117 where no controller could authenticate. Now we exit.
3118 - If we require CookieAuthentication, stop generating a new cookie
3119 every time we change any piece of our config.
3120 - Refuse to start with certain directory authority keys, and
3121 encourage people using them to stop.
3122 - Terminate multi-line control events properly. Original patch
3124 - Fix a minor memory leak when we fail to find enough suitable
3125 servers to choose a circuit.
3126 - Stop leaking part of the descriptor when we run into a particularly
3127 unparseable piece of it.
3130 Changes in version 0.2.0.6-alpha - 2007-08-26
3131 This sixth development snapshot features a new Vidalia version in the
3132 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
3133 the ControlPort in the default configuration, which addresses important
3136 In addition, this snapshot fixes major load balancing problems
3137 with path selection, which should speed things up a lot once many
3138 people have upgraded. The directory authorities also use a new
3139 mean-time-between-failure approach to tracking which servers are stable,
3140 rather than just looking at the most recent uptime.
3142 o New directory authorities:
3143 - Set up Tonga as the default bridge directory authority.
3146 - Directory authorities now track servers by weighted
3147 mean-times-between-failures. When we have 4 or more days of data,
3148 use measured MTBF rather than declared uptime to decide whether
3149 to call a router Stable. Implements proposal 108.
3151 o Major bugfixes (load balancing):
3152 - When choosing nodes for non-guard positions, weight guards
3153 proportionally less, since they already have enough load. Patch
3155 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
3156 will allow fast Tor servers to get more attention.
3157 - When we're upgrading from an old Tor version, forget our current
3158 guards and pick new ones according to the new weightings. These
3159 three load balancing patches could raise effective network capacity
3160 by a factor of four. Thanks to Mike Perry for measurements.
3162 o Major bugfixes (descriptor parsing):
3163 - Handle unexpected whitespace better in malformed descriptors. Bug
3164 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
3167 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
3168 GETINFO for Torstat to use until it can switch to using extrainfos.
3169 - Optionally (if built with -DEXPORTMALLINFO) export the output
3170 of mallinfo via http, as tor/mallinfo.txt. Only accessible
3174 - Do not intermix bridge routers with controller-added
3175 routers. (Bugfix on 0.2.0.x)
3176 - Do not fail with an assert when accept() returns an unexpected
3177 address family. Addresses but does not wholly fix bug 483. (Bugfix
3179 - Let directory authorities startup even when they can't generate
3180 a descriptor immediately, e.g. because they don't know their
3182 - Stop putting the authentication cookie in a file called "0"
3183 in your working directory if you don't specify anything for the
3184 new CookieAuthFile option. Reported by Matt Edman.
3185 - Make it possible to read the PROTOCOLINFO response in a way that
3186 conforms to our control-spec. Reported by Matt Edman.
3187 - Fix a minor memory leak when we fail to find enough suitable
3188 servers to choose a circuit. Bugfix on 0.1.2.x.
3189 - Stop leaking part of the descriptor when we run into a particularly
3190 unparseable piece of it. Bugfix on 0.1.2.x.
3191 - Unmap the extrainfo cache file on exit.
3194 Changes in version 0.2.0.5-alpha - 2007-08-19
3195 This fifth development snapshot fixes compilation on Windows again;
3196 fixes an obnoxious client-side bug that slowed things down and put
3197 extra load on the network; gets us closer to using the v3 directory
3198 voting scheme; makes it easier for Tor controllers to use cookie-based
3199 authentication; and fixes a variety of other bugs.
3202 - Version 1 directories are no longer generated in full. Instead,
3203 authorities generate and serve "stub" v1 directories that list
3204 no servers. This will stop Tor versions 0.1.0.x and earlier from
3205 working, but (for security reasons) nobody should be running those
3208 o Major bugfixes (compilation, 0.2.0.x):
3209 - Try to fix Win32 compilation again: improve checking for IPv6 types.
3210 - Try to fix MSVC compilation: build correctly on platforms that do
3211 not define s6_addr16 or s6_addr32.
3212 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
3215 o Major bugfixes (stream expiration):
3216 - Expire not-yet-successful application streams in all cases if
3217 they've been around longer than SocksTimeout. Right now there are
3218 some cases where the stream will live forever, demanding a new
3219 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
3222 o Minor features (directory servers):
3223 - When somebody requests a list of statuses or servers, and we have
3224 none of those, return a 404 rather than an empty 200.
3226 o Minor features (directory voting):
3227 - Store v3 consensus status consensuses on disk, and reload them
3230 o Minor features (security):
3231 - Warn about unsafe ControlPort configurations.
3232 - Refuse to start with certain directory authority keys, and
3233 encourage people using them to stop.
3235 o Minor features (controller):
3236 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
3237 is valid before any authentication has been received. It tells
3238 a controller what kind of authentication is expected, and what
3239 protocol is spoken. Implements proposal 119.
3240 - New config option CookieAuthFile to choose a new location for the
3241 cookie authentication file, and config option
3242 CookieAuthFileGroupReadable to make it group-readable.
3244 o Minor features (unit testing):
3245 - Add command-line arguments to unit-test executable so that we can
3246 invoke any chosen test from the command line rather than having
3247 to run the whole test suite at once; and so that we can turn on
3248 logging for the unit tests.
3250 o Minor bugfixes (on 0.1.2.x):
3251 - If we require CookieAuthentication but we fail to write the
3252 cookie file, we would warn but not exit, and end up in a state
3253 where no controller could authenticate. Now we exit.
3254 - If we require CookieAuthentication, stop generating a new cookie
3255 every time we change any piece of our config.
3256 - When loading bandwidth history, do not believe any information in
3257 the future. Fixes bug 434.
3258 - When loading entry guard information, do not believe any information
3260 - When we have our clock set far in the future and generate an
3261 onion key, then re-set our clock to be correct, we should not stop
3262 the onion key from getting rotated.
3263 - Clean up torrc sample config file.
3264 - Do not automatically run configure from autogen.sh. This
3265 non-standard behavior tended to annoy people who have built other
3268 o Minor bugfixes (on 0.2.0.x):
3269 - Fix a bug with AutomapHostsOnResolve that would always cause
3270 the second request to fail. Bug reported by Kate. Bugfix on
3272 - Fix a bug in ADDRMAP controller replies that would sometimes
3273 try to print a NULL. Patch from tup.
3274 - Read v3 directory authority keys from the right location.
3275 - Numerous bugfixes to directory voting code.
3278 Changes in version 0.1.2.16 - 2007-08-01
3279 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
3280 remote attacker in certain situations to rewrite the user's torrc
3281 configuration file. This can completely compromise anonymity of users
3282 in most configurations, including those running the Vidalia bundles,
3283 TorK, etc. Or worse.
3285 o Major security fixes:
3286 - Close immediately after missing authentication on control port;
3287 do not allow multiple authentication attempts.
3290 Changes in version 0.2.0.4-alpha - 2007-08-01
3291 This fourth development snapshot fixes a critical security vulnerability
3292 for most users, specifically those running Vidalia, TorK, etc. Everybody
3293 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
3295 o Major security fixes:
3296 - Close immediately after missing authentication on control port;
3297 do not allow multiple authentication attempts.
3299 o Major bugfixes (compilation):
3300 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
3303 o Minor features (performance):
3304 - Be even more aggressive about releasing RAM from small
3305 empty buffers. Thanks to our free-list code, this shouldn't be too
3306 performance-intensive.
3307 - Disable sentinel-based debugging for buffer code: we squashed all
3308 the bugs that this was supposed to detect a long time ago, and
3309 now its only effect is to change our buffer sizes from nice
3310 powers of two (which platform mallocs tend to like) to values
3311 slightly over powers of two (which make some platform mallocs sad).
3312 - Log malloc statistics from mallinfo() on platforms where it
3316 Changes in version 0.2.0.3-alpha - 2007-07-29
3317 This third development snapshot introduces new experimental
3318 blocking-resistance features and a preliminary version of the v3
3319 directory voting design, and includes many other smaller features
3323 - The first pieces of our "bridge" design for blocking-resistance
3324 are implemented. People can run bridge directory authorities;
3325 people can run bridges; and people can configure their Tor clients
3326 with a set of bridges to use as the first hop into the Tor network.
3327 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
3329 - Create listener connections before we setuid to the configured
3330 User and Group. Now non-Windows users can choose port values
3331 under 1024, start Tor as root, and have Tor bind those ports
3332 before it changes to another UID. (Windows users could already
3334 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
3335 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
3336 on "vserver" accounts. (Patch from coderman.)
3337 - Be even more aggressive about separating local traffic from relayed
3338 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
3340 o Major features (experimental):
3341 - First cut of code for "v3 dir voting": directory authorities will
3342 vote on a common network status document rather than each publishing
3343 their own opinion. This code needs more testing and more corner-case
3344 handling before it's ready for use.
3347 - Directory authorities now call routers Fast if their bandwidth is
3348 at least 100KB/s, and consider their bandwidth adequate to be a
3349 Guard if it is at least 250KB/s, no matter the medians. This fix
3350 complements proposal 107. [Bugfix on 0.1.2.x]
3351 - Directory authorities now never mark more than 3 servers per IP as
3352 Valid and Running. (Implements proposal 109, by Kevin Bauer and
3354 - Minor change to organizationName and commonName generation
3355 procedures in TLS certificates during Tor handshakes, to invalidate
3356 some earlier censorware approaches. This is not a long-term
3357 solution, but applying it will give us a bit of time to look into
3358 the epidemiology of countermeasures as they spread.
3360 o Major bugfixes (directory):
3361 - Rewrite directory tokenization code to never run off the end of
3362 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
3364 o Minor features (controller):
3365 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
3366 match requests to applications. (Patch from Robert Hogan.)
3367 - Report address and port correctly on connections to DNSPort. (Patch
3369 - Add a RESOLVE command to launch hostname lookups. (Original patch
3371 - Add GETINFO status/enough-dir-info to let controllers tell whether
3372 Tor has downloaded sufficient directory information. (Patch
3374 - You can now use the ControlSocket option to tell Tor to listen for
3375 controller connections on Unix domain sockets on systems that
3376 support them. (Patch from Peter Palfrader.)
3377 - STREAM NEW events are generated for DNSPort requests and for
3378 tunneled directory connections. (Patch from Robert Hogan.)
3379 - New "GETINFO address-mappings/*" command to get address mappings
3380 with expiry information. "addr-mappings/*" is now deprecated.
3383 o Minor features (misc):
3384 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
3386 - The tor-gencert tool for v3 directory authorities now creates all
3387 files as readable to the file creator only, and write-protects
3388 the authority identity key.
3389 - When dumping memory usage, list bytes used in buffer memory
3391 - When running with dmalloc, dump more stats on hup and on exit.
3392 - Directory authorities now fail quickly and (relatively) harmlessly
3393 if they generate a network status document that is somehow
3396 o Traffic load balancing improvements:
3397 - If exit bandwidth ever exceeds one third of total bandwidth, then
3398 use the correct formula to weight exit nodes when choosing paths.
3399 (Based on patch from Mike Perry.)
3400 - Choose perfectly fairly among routers when choosing by bandwidth and
3401 weighting by fraction of bandwidth provided by exits. Previously, we
3402 would choose with only approximate fairness, and correct ourselves
3403 if we ran off the end of the list. [Bugfix on 0.1.2.x]
3405 o Performance improvements:
3406 - Be more aggressive with freeing buffer RAM or putting it on the
3408 - Use Critical Sections rather than Mutexes for synchronizing threads
3409 on win32; Mutexes are heavier-weight, and designed for synchronizing
3412 o Deprecated and removed features:
3413 - RedirectExits is now deprecated.
3414 - Stop allowing address masks that do not correspond to bit prefixes.
3415 We have warned about these for a really long time; now it's time
3416 to reject them. (Patch from croup.)
3418 o Minor bugfixes (directory):
3419 - Fix another crash bug related to extra-info caching. (Bug found by
3420 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
3421 - Directories no longer return a "304 not modified" when they don't
3422 have the networkstatus the client asked for. Also fix a memory
3423 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
3424 - We had accidentally labelled 0.1.2.x directory servers as not
3425 suitable for begin_dir requests, and had labelled no directory
3426 servers as suitable for uploading extra-info documents. [Bugfix
3429 o Minor bugfixes (dns):
3430 - Fix a crash when DNSPort is set more than once. (Patch from Robert
3431 Hogan.) [Bugfix on 0.2.0.2-alpha]
3432 - Add DNSPort connections to the global connection list, so that we
3433 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
3435 - Fix a dangling reference that could lead to a crash when DNSPort is
3436 changed or closed (Patch from Robert Hogan.) [Bugfix on
3439 o Minor bugfixes (controller):
3440 - Provide DNS expiry times in GMT, not in local time. For backward
3441 compatibility, ADDRMAP events only provide GMT expiry in an extended
3442 field. "GETINFO address-mappings" always does the right thing.
3443 - Use CRLF line endings properly in NS events.
3444 - Terminate multi-line control events properly. (Original patch
3445 from tup.) [Bugfix on 0.1.2.x-alpha]
3446 - Do not include spaces in SOURCE_ADDR fields in STREAM
3447 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
3450 Changes in version 0.1.2.15 - 2007-07-17
3451 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
3452 problems, fixes compilation on BSD, and fixes a variety of other
3453 bugs. Everybody should upgrade.
3455 o Major bugfixes (compilation):
3456 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
3458 o Major bugfixes (crashes):
3459 - Try even harder not to dereference the first character after
3460 an mmap(). Reported by lodger.
3461 - Fix a crash bug in directory authorities when we re-number the
3462 routerlist while inserting a new router.
3463 - When the cached-routers file is an even multiple of the page size,
3464 don't run off the end and crash. (Fixes bug 455; based on idea
3466 - Fix eventdns.c behavior on Solaris: It is critical to include
3467 orconfig.h _before_ sys/types.h, so that we can get the expected
3468 definition of _FILE_OFFSET_BITS.
3470 o Major bugfixes (security):
3471 - Fix a possible buffer overrun when using BSD natd support. Bug
3473 - When sending destroy cells from a circuit's origin, don't include
3474 the reason for tearing down the circuit. The spec says we didn't,
3475 and now we actually don't. Reported by lodger.
3476 - Keep streamids from different exits on a circuit separate. This
3477 bug may have allowed other routers on a given circuit to inject
3478 cells into streams. Reported by lodger; fixes bug 446.
3479 - If there's a never-before-connected-to guard node in our list,
3480 never choose any guards past it. This way we don't expand our
3481 guard list unless we need to.
3483 o Minor bugfixes (guard nodes):
3484 - Weight guard selection by bandwidth, so that low-bandwidth nodes
3485 don't get overused as guards.
3487 o Minor bugfixes (directory):
3488 - Correctly count the number of authorities that recommend each
3489 version. Previously, we were under-counting by 1.
3490 - Fix a potential crash bug when we load many server descriptors at
3491 once and some of them make others of them obsolete. Fixes bug 458.
3493 o Minor bugfixes (hidden services):
3494 - Stop tearing down the whole circuit when the user asks for a
3495 connection to a port that the hidden service didn't configure.
3498 o Minor bugfixes (misc):
3499 - On Windows, we were preventing other processes from reading
3500 cached-routers while Tor was running. Reported by janbar.
3501 - Fix a possible (but very unlikely) bug in picking routers by
3502 bandwidth. Add a log message to confirm that it is in fact
3503 unlikely. Patch from lodger.
3504 - Backport a couple of memory leak fixes.
3505 - Backport miscellaneous cosmetic bugfixes.
3508 Changes in version 0.2.0.2-alpha - 2007-06-02
3509 o Major bugfixes on 0.2.0.1-alpha:
3510 - Fix an assertion failure related to servers without extra-info digests.
3511 Resolves bugs 441 and 442.
3513 o Minor features (directory):
3514 - Support "If-Modified-Since" when answering HTTP requests for
3515 directories, running-routers documents, and network-status documents.
3516 (There's no need to support it for router descriptors, since those
3517 are downloaded by descriptor digest.)
3519 o Minor build issues:
3520 - Clear up some MIPSPro compiler warnings.
3521 - When building from a tarball on a machine that happens to have SVK
3522 installed, report the micro-revision as whatever version existed
3523 in the tarball, not as "x".
3526 Changes in version 0.2.0.1-alpha - 2007-06-01
3527 This early development snapshot provides new features for people running
3528 Tor as both a client and a server (check out the new RelayBandwidth
3529 config options); lets Tor run as a DNS proxy; and generally moves us
3530 forward on a lot of fronts.
3532 o Major features, server usability:
3533 - New config options RelayBandwidthRate and RelayBandwidthBurst:
3534 a separate set of token buckets for relayed traffic. Right now
3535 relayed traffic is defined as answers to directory requests, and
3536 OR connections that don't have any local circuits on them.
3538 o Major features, client usability:
3539 - A client-side DNS proxy feature to replace the need for
3540 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
3541 for DNS requests on port 9999, use the Tor network to resolve them
3542 anonymously, and send the reply back like a regular DNS server.
3543 The code still only implements a subset of DNS.
3544 - Make PreferTunneledDirConns and TunnelDirConns work even when
3545 we have no cached directory info. This means Tor clients can now
3546 do all of their connections protected by TLS.
3548 o Major features, performance and efficiency:
3549 - Directory authorities accept and serve "extra info" documents for
3550 routers. These documents contain fields from router descriptors
3551 that aren't usually needed, and that use a lot of excess
3552 bandwidth. Once these fields are removed from router descriptors,
3553 the bandwidth savings should be about 60%. [Partially implements
3555 - Servers upload extra-info documents to any authority that accepts
3556 them. Authorities (and caches that have been configured to download
3557 extra-info documents) download them as needed. [Partially implements
3559 - Change the way that Tor buffers data that it is waiting to write.
3560 Instead of queueing data cells in an enormous ring buffer for each
3561 client->OR or OR->OR connection, we now queue cells on a separate
3562 queue for each circuit. This lets us use less slack memory, and
3563 will eventually let us be smarter about prioritizing different kinds
3565 - Use memory pools to allocate cells with better speed and memory
3566 efficiency, especially on platforms where malloc() is inefficient.
3567 - Stop reading on edge connections when their corresponding circuit
3568 buffers are full; start again as the circuits empty out.
3570 o Major features, other:
3571 - Add an HSAuthorityRecordStats option that hidden service authorities
3572 can use to track statistics of overall hidden service usage without
3573 logging information that would be very useful to an attacker.
3574 - Start work implementing multi-level keys for directory authorities:
3575 Add a standalone tool to generate key certificates. (Proposal 103.)
3578 - Directory authorities now call routers Stable if they have an
3579 uptime of at least 30 days, even if that's not the median uptime
3580 in the network. Implements proposal 107, suggested by Kevin Bauer
3583 o Minor fixes (resource management):
3584 - Count the number of open sockets separately from the number
3585 of active connection_t objects. This will let us avoid underusing
3586 our allocated connection limit.
3587 - We no longer use socket pairs to link an edge connection to an
3588 anonymous directory connection or a DirPort test connection.
3589 Instead, we track the link internally and transfer the data
3590 in-process. This saves two sockets per "linked" connection (at the
3591 client and at the server), and avoids the nasty Windows socketpair()
3593 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
3594 for every single inactive connection_t. Free items from the
3595 4k/16k-buffer free lists when they haven't been used for a while.
3597 o Minor features (build):
3598 - Make autoconf search for libevent, openssl, and zlib consistently.
3599 - Update deprecated macros in configure.in.
3600 - When warning about missing headers, tell the user to let us
3601 know if the compile succeeds anyway, so we can downgrade the
3603 - Include the current subversion revision as part of the version
3604 string: either fetch it directly if we're in an SVN checkout, do
3605 some magic to guess it if we're in an SVK checkout, or use
3606 the last-detected version if we're building from a .tar.gz.
3607 Use this version consistently in log messages.
3609 o Minor features (logging):
3610 - Always prepend "Bug: " to any log message about a bug.
3611 - Put a platform string (e.g. "Linux i686") in the startup log
3612 message, so when people paste just their logs, we know if it's
3613 OpenBSD or Windows or what.
3614 - When logging memory usage, break down memory used in buffers by
3617 o Minor features (directory system):
3618 - New config option V2AuthoritativeDirectory that all directory
3619 authorities should set. This will let future authorities choose
3620 not to serve V2 directory information.
3621 - Directory authorities allow multiple router descriptors and/or extra
3622 info documents to be uploaded in a single go. This will make
3623 implementing proposal 104 simpler.
3625 o Minor features (controller):
3626 - Add a new config option __DisablePredictedCircuits designed for
3627 use by the controller, when we don't want Tor to build any circuits
3629 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
3630 so we can exit from the middle of the circuit.
3631 - Implement "getinfo status/circuit-established".
3632 - Implement "getinfo status/version/..." so a controller can tell
3633 whether the current version is recommended, and whether any versions
3634 are good, and how many authorities agree. (Patch from shibz.)
3636 o Minor features (hidden services):
3637 - Allow multiple HiddenServicePort directives with the same virtual
3638 port; when they occur, the user is sent round-robin to one
3639 of the target ports chosen at random. Partially fixes bug 393 by
3640 adding limited ad-hoc round-robining.
3642 o Minor features (other):
3644 - Add a new AutomapHostsOnResolve option: when it is enabled, any
3645 resolve request for hosts matching a given pattern causes Tor to
3646 generate an internal virtual address mapping for that host. This
3647 allows DNSPort to work sensibly with hidden service users. By
3648 default, .exit and .onion addresses are remapped; the list of
3649 patterns can be reconfigured with AutomapHostsSuffixes.
3650 - Add an "-F" option to tor-resolve to force a resolve for a .onion
3651 address. Thanks to the AutomapHostsOnResolve option, this is no
3652 longer a completely silly thing to do.
3653 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
3654 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
3655 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
3656 minus 1 byte: the actual maximum declared bandwidth.
3659 - Removed support for the old binary "version 0" controller protocol.
3660 This has been deprecated since 0.1.1, and warnings have been issued
3661 since 0.1.2. When we encounter a v0 control message, we now send
3662 back an error and close the connection.
3663 - Remove the old "dns worker" server DNS code: it hasn't been default
3664 since 0.1.2.2-alpha, and all the servers seem to be using the new
3667 o Minor bugfixes (portability):
3668 - Even though Windows is equally happy with / and \ as path separators,
3669 try to use \ consistently on Windows and / consistently on Unix: it
3670 makes the log messages nicer.
3671 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
3672 - Read resolv.conf files correctly on platforms where read() returns
3673 partial results on small file reads.
3675 o Minor bugfixes (directory):
3676 - Correctly enforce that elements of directory objects do not appear
3677 more often than they are allowed to appear.
3678 - When we are reporting the DirServer line we just parsed, we were
3679 logging the second stanza of the key fingerprint, not the first.
3681 o Minor bugfixes (logging):
3682 - When we hit an EOF on a log (probably because we're shutting down),
3683 don't try to remove the log from the list: just mark it as
3684 unusable. (Bulletproofs against bug 222.)
3686 o Minor bugfixes (other):
3687 - In the exitlist script, only consider the most recently published
3688 server descriptor for each server. Also, when the user requests
3689 a list of servers that _reject_ connections to a given address,
3690 explicitly exclude the IPs that also have servers that accept
3691 connections to that address. (Resolves bug 405.)
3692 - Stop allowing hibernating servers to be "stable" or "fast".
3693 - On Windows, we were preventing other processes from reading
3694 cached-routers while Tor was running. (Reported by janbar)
3695 - Make the NodeFamilies config option work. (Reported by
3696 lodger -- it has never actually worked, even though we added it
3698 - Check return values from pthread_mutex functions.
3699 - Don't save non-general-purpose router descriptors to the disk cache,
3700 because we have no way of remembering what their purpose was when
3702 - Add even more asserts to hunt down bug 417.
3703 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
3704 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
3705 Add a log message to confirm that it is in fact unlikely.
3707 o Minor bugfixes (controller):
3708 - Make 'getinfo fingerprint' return a 551 error if we're not a
3709 server, so we match what the control spec claims we do. Reported
3711 - Fix a typo in an error message when extendcircuit fails that
3712 caused us to not follow the \r\n-based delimiter protocol. Reported
3715 o Code simplifications and refactoring:
3716 - Stop passing around circuit_t and crypt_path_t pointers that are
3717 implicit in other procedure arguments.
3718 - Drop the old code to choke directory connections when the
3719 corresponding OR connections got full: thanks to the cell queue
3720 feature, OR conns don't get full any more.
3721 - Make dns_resolve() handle attaching connections to circuits
3722 properly, so the caller doesn't have to.
3723 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
3724 - Keep the connection array as a dynamic smartlist_t, rather than as
3725 a fixed-sized array. This is important, as the number of connections
3726 is becoming increasingly decoupled from the number of sockets.
3729 Changes in version 0.1.2.14 - 2007-05-25
3730 Tor 0.1.2.14 changes the addresses of two directory authorities (this
3731 change especially affects those who serve or use hidden services),
3732 and fixes several other crash- and security-related bugs.
3734 o Directory authority changes:
3735 - Two directory authorities (moria1 and moria2) just moved to new
3736 IP addresses. This change will particularly affect those who serve
3737 or use hidden services.
3739 o Major bugfixes (crashes):
3740 - If a directory server runs out of space in the connection table
3741 as it's processing a begin_dir request, it will free the exit stream
3742 but leave it attached to the circuit, leading to unpredictable
3743 behavior. (Reported by seeess, fixes bug 425.)
3744 - Fix a bug in dirserv_remove_invalid() that would cause authorities
3745 to corrupt memory under some really unlikely scenarios.
3746 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
3747 - Avoid segfaults when reading from mmaped descriptor file. (Reported
3750 o Major bugfixes (security):
3751 - When choosing an entry guard for a circuit, avoid using guards
3752 that are in the same family as the chosen exit -- not just guards
3753 that are exactly the chosen exit. (Reported by lodger.)
3755 o Major bugfixes (resource management):
3756 - If a directory authority is down, skip it when deciding where to get
3757 networkstatus objects or descriptors. Otherwise we keep asking
3758 every 10 seconds forever. Fixes bug 384.
3759 - Count it as a failure if we fetch a valid network-status but we
3760 don't want to keep it. Otherwise we'll keep fetching it and keep
3761 not wanting to keep it. Fixes part of bug 422.
3762 - If all of our dirservers have given us bad or no networkstatuses
3763 lately, then stop hammering them once per minute even when we
3764 think they're failed. Fixes another part of bug 422.
3767 - Actually set the purpose correctly for descriptors inserted with
3769 - When we have k non-v2 authorities in our DirServer config,
3770 we ignored the last k authorities in the list when updating our
3772 - Correctly back-off from requesting router descriptors that we are
3773 having a hard time downloading.
3774 - Read resolv.conf files correctly on platforms where read() returns
3775 partial results on small file reads.
3776 - Don't rebuild the entire router store every time we get 32K of
3777 routers: rebuild it when the journal gets very large, or when
3778 the gaps in the store get very large.
3781 - When routers publish SVN revisions in their router descriptors,
3782 authorities now include those versions correctly in networkstatus
3784 - Warn when using a version of libevent before 1.3b to run a server on
3785 OSX or BSD: these versions interact badly with userspace threads.
3788 Changes in version 0.1.2.13 - 2007-04-24
3789 This release features some major anonymity fixes, such as safer path
3790 selection; better client performance; faster bootstrapping, better
3791 address detection, and better DNS support for servers; write limiting as
3792 well as read limiting to make servers easier to run; and a huge pile of
3793 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
3795 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
3796 of the Freenode IRC network, remembering his patience and vision for
3797 free speech on the Internet.
3800 - Fix a memory leak when we ask for "all" networkstatuses and we
3801 get one we don't recognize.
3802 - Add more asserts to hunt down bug 417.
3803 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
3806 Changes in version 0.1.2.12-rc - 2007-03-16
3808 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
3809 directory information requested inside Tor connections (i.e. via
3810 begin_dir cells). It only triggered when the same connection was
3811 serving other data at the same time. Reported by seeess.
3814 - When creating a circuit via the controller, send a 'launched'
3815 event when we're done, so we follow the spec better.
3818 Changes in version 0.1.2.11-rc - 2007-03-15
3819 o Minor bugfixes (controller), reported by daejees:
3820 - Correct the control spec to match how the code actually responds
3821 to 'getinfo addr-mappings/*'.
3822 - The control spec described a GUARDS event, but the code
3823 implemented a GUARD event. Standardize on GUARD, but let people
3827 Changes in version 0.1.2.10-rc - 2007-03-07
3828 o Major bugfixes (Windows):
3829 - Do not load the NT services library functions (which may not exist)
3830 just to detect if we're a service trying to shut down. Now we run
3831 on Win98 and friends again.
3833 o Minor bugfixes (other):
3834 - Clarify a couple of log messages.
3835 - Fix a misleading socks5 error number.
3838 Changes in version 0.1.2.9-rc - 2007-03-02
3839 o Major bugfixes (Windows):
3840 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
3841 of the usual GCC "%llu". This prevents a bug when saving 64-bit
3842 int configuration values: the high-order 32 bits would get
3843 truncated. In particular, we were being bitten by the default
3844 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
3845 and maybe also bug 397.)
3847 o Minor bugfixes (performance):
3848 - Use OpenSSL's AES implementation on platforms where it's faster.
3849 This could save us as much as 10% CPU usage.
3851 o Minor bugfixes (server):
3852 - Do not rotate onion key immediately after setting it for the first
3855 o Minor bugfixes (directory authorities):
3856 - Stop calling servers that have been hibernating for a long time
3857 "stable". Also, stop letting hibernating or obsolete servers affect
3858 uptime and bandwidth cutoffs.
3859 - Stop listing hibernating servers in the v1 directory.
3861 o Minor bugfixes (hidden services):
3862 - Upload hidden service descriptors slightly less often, to reduce
3863 load on authorities.
3865 o Minor bugfixes (other):
3866 - Fix an assert that could trigger if a controller quickly set then
3867 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
3868 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
3870 - Fix a potential race condition in the rpm installer. Found by
3872 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
3873 of 2 as indicating that the server is completely bad; it sometimes
3874 means that the server is just bad for the request in question. (may fix
3875 the last of bug 326.)
3876 - Disable encrypted directory connections when we don't have a server
3877 descriptor for the destination. We'll get this working again in
3881 Changes in version 0.1.2.8-beta - 2007-02-26
3882 o Major bugfixes (crashes):
3883 - Stop crashing when the controller asks us to resetconf more than
3884 one config option at once. (Vidalia 0.0.11 does this.)
3885 - Fix a crash that happened on Win98 when we're given command-line
3886 arguments: don't try to load NT service functions from advapi32.dll
3887 except when we need them. (Bug introduced in 0.1.2.7-alpha;
3889 - Fix a longstanding obscure crash bug that could occur when
3890 we run out of DNS worker processes. (Resolves bug 390.)
3892 o Major bugfixes (hidden services):
3893 - Correctly detect whether hidden service descriptor downloads are
3894 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
3896 o Major bugfixes (accounting):
3897 - When we start during an accounting interval before it's time to wake
3898 up, remember to wake up at the correct time. (May fix bug 342.)
3900 o Minor bugfixes (controller):
3901 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
3902 clear the corresponding on_circuit variable, and remember later
3903 that we don't need to send a redundant CLOSED event. (Resolves part
3905 - Report events where a resolve succeeded or where we got a socks
3906 protocol error correctly, rather than calling both of them
3908 - Change reported stream target addresses to IP consistently when
3909 we finally get the IP from an exit node.
3910 - Send log messages to the controller even if they happen to be very
3913 o Minor bugfixes (other):
3914 - Display correct results when reporting which versions are
3915 recommended, and how recommended they are. (Resolves bug 383.)
3916 - Improve our estimates for directory bandwidth to be less random:
3917 guess that an unrecognized directory will have the average bandwidth
3918 from all known directories, not that it will have the average
3919 bandwidth from those directories earlier than it on the list.
3920 - If we start a server with ClientOnly 1, then set ClientOnly to 0
3921 and hup, stop triggering an assert based on an empty onion_key.
3922 - On platforms with no working mmap() equivalent, don't warn the
3923 user when cached-routers doesn't exist.
3924 - Warn the user when mmap() [or its equivalent] fails for some reason
3925 other than file-not-found.
3926 - Don't warn the user when cached-routers.new doesn't exist: that's
3927 perfectly fine when starting up for the first time.
3928 - When EntryNodes are configured, rebuild the guard list to contain,
3929 in order: the EntryNodes that were guards before; the rest of the
3930 EntryNodes; the nodes that were guards before.
3931 - Mask out all signals in sub-threads; only the libevent signal
3932 handler should be processing them. This should prevent some crashes
3933 on some machines using pthreads. (Patch from coderman.)
3934 - Fix switched arguments on memset in the implementation of
3935 tor_munmap() for systems with no mmap() call.
3936 - When Tor receives a router descriptor that it asked for, but
3937 no longer wants (because it has received fresh networkstatuses
3938 in the meantime), do not warn the user. Cache the descriptor if
3939 we're a cache; drop it if we aren't.
3940 - Make earlier entry guards _really_ get retried when the network
3942 - On a malformed DNS reply, always give an error to the corresponding
3944 - Build with recent libevents on platforms that do not define the
3945 nonstandard types "u_int8_t" and friends.
3947 o Minor features (controller):
3948 - Warn the user when an application uses the obsolete binary v0
3949 control protocol. We're planning to remove support for it during
3950 the next development series, so it's good to give people some
3952 - Add STREAM_BW events to report per-entry-stream bandwidth
3953 use. (Patch from Robert Hogan.)
3954 - Rate-limit SIGNEWNYM signals in response to controllers that
3955 impolitely generate them for every single stream. (Patch from
3956 mwenge; closes bug 394.)
3957 - Make REMAP stream events have a SOURCE (cache or exit), and
3958 make them generated in every case where we get a successful
3959 connected or resolved cell.
3961 o Minor bugfixes (performance):
3962 - Call router_have_min_dir_info half as often. (This is showing up in
3963 some profiles, but not others.)
3964 - When using GCC, make log_debug never get called at all, and its
3965 arguments never get evaluated, when no debug logs are configured.
3966 (This is showing up in some profiles, but not others.)
3969 - Remove some never-implemented options. Mark PathlenCoinWeight as
3971 - Implement proposal 106: Stop requiring clients to have well-formed
3972 certificates; stop checking nicknames in certificates. (Clients
3973 have certificates so that they can look like Tor servers, but in
3974 the future we might want to allow them to look like regular TLS
3975 clients instead. Nicknames in certificates serve no purpose other
3976 than making our protocol easier to recognize on the wire.)
3977 - Revise messages on handshake failure again to be even more clear about
3978 which are incoming connections and which are outgoing.
3979 - Discard any v1 directory info that's over 1 month old (for
3980 directories) or over 1 week old (for running-routers lists).
3981 - Do not warn when individual nodes in the configuration's EntryNodes,
3982 ExitNodes, etc are down: warn only when all possible nodes
3983 are down. (Fixes bug 348.)
3984 - Always remove expired routers and networkstatus docs before checking
3985 whether we have enough information to build circuits. (Fixes
3987 - Put a lower-bound on MaxAdvertisedBandwidth.
3990 Changes in version 0.1.2.7-alpha - 2007-02-06
3991 o Major bugfixes (rate limiting):
3992 - Servers decline directory requests much more aggressively when
3993 they're low on bandwidth. Otherwise they end up queueing more and
3994 more directory responses, which can't be good for latency.
3995 - But never refuse directory requests from local addresses.
3996 - Fix a memory leak when sending a 503 response for a networkstatus
3998 - Be willing to read or write on local connections (e.g. controller
3999 connections) even when the global rate limiting buckets are empty.
4000 - If our system clock jumps back in time, don't publish a negative
4001 uptime in the descriptor. Also, don't let the global rate limiting
4002 buckets go absurdly negative.
4003 - Flush local controller connection buffers periodically as we're
4004 writing to them, so we avoid queueing 4+ megabytes of data before
4007 o Major bugfixes (NT services):
4008 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
4009 command-line flag so that admins can override the default by saying
4010 "tor --service install --user "SomeUser"". This will not affect
4011 existing installed services. Also, warn the user that the service
4012 will look for its configuration file in the service user's
4013 %appdata% directory. (We can't do the 'hardwire the user's appdata
4014 directory' trick any more, since we may not have read access to that
4017 o Major bugfixes (other):
4018 - Previously, we would cache up to 16 old networkstatus documents
4019 indefinitely, if they came from nontrusted authorities. Now we
4020 discard them if they are more than 10 days old.
4021 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
4023 - Detect and reject malformed DNS responses containing circular
4025 - If exits are rare enough that we're not marking exits as guards,
4026 ignore exit bandwidth when we're deciding the required bandwidth
4028 - When we're handling a directory connection tunneled over Tor,
4029 don't fill up internal memory buffers with all the data we want
4030 to tunnel; instead, only add it if the OR connection that will
4031 eventually receive it has some room for it. (This can lead to
4032 slowdowns in tunneled dir connections; a better solution will have
4035 o Minor bugfixes (dns):
4036 - Add some defensive programming to eventdns.c in an attempt to catch
4037 possible memory-stomping bugs.
4038 - Detect and reject DNS replies containing IPv4 or IPv6 records with
4039 an incorrect number of bytes. (Previously, we would ignore the
4041 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
4042 in the correct order, and doesn't crash.
4043 - Free memory held in recently-completed DNS lookup attempts on exit.
4044 This was not a memory leak, but may have been hiding memory leaks.
4045 - Handle TTL values correctly on reverse DNS lookups.
4046 - Treat failure to parse resolv.conf as an error.
4048 o Minor bugfixes (other):
4049 - Fix crash with "tor --list-fingerprint" (reported by seeess).
4050 - When computing clock skew from directory HTTP headers, consider what
4051 time it was when we finished asking for the directory, not what
4053 - Expire socks connections if they spend too long waiting for the
4054 handshake to finish. Previously we would let them sit around for
4055 days, if the connecting application didn't close them either.
4056 - And if the socks handshake hasn't started, don't send a
4057 "DNS resolve socks failed" handshake reply; just close it.
4058 - Stop using C functions that OpenBSD's linker doesn't like.
4059 - Don't launch requests for descriptors unless we have networkstatuses
4060 from at least half of the authorities. This delays the first
4061 download slightly under pathological circumstances, but can prevent
4062 us from downloading a bunch of descriptors we don't need.
4063 - Do not log IPs with TLS failures for incoming TLS
4064 connections. (Fixes bug 382.)
4065 - If the user asks to use invalid exit nodes, be willing to use
4067 - Stop using the reserved ac_cv namespace in our configure script.
4068 - Call stat() slightly less often; use fstat() when possible.
4069 - Refactor the way we handle pending circuits when an OR connection
4070 completes or fails, in an attempt to fix a rare crash bug.
4071 - Only rewrite a conn's address based on X-Forwarded-For: headers
4072 if it's a parseable public IP address; and stop adding extra quotes
4073 to the resulting address.
4076 - Weight directory requests by advertised bandwidth. Now we can
4077 let servers enable write limiting but still allow most clients to
4078 succeed at their directory requests. (We still ignore weights when
4079 choosing a directory authority; I hope this is a feature.)
4082 - Create a new file ReleaseNotes which was the old ChangeLog. The
4083 new ChangeLog file now includes the summaries for all development
4085 - Check for addresses with invalid characters at the exit as well
4086 as at the client, and warn less verbosely when they fail. You can
4087 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
4088 - Adapt a patch from goodell to let the contrib/exitlist script
4089 take arguments rather than require direct editing.
4090 - Inform the server operator when we decide not to advertise a
4091 DirPort due to AccountingMax enabled or a low BandwidthRate. It
4092 was confusing Zax, so now we're hopefully more helpful.
4093 - Bring us one step closer to being able to establish an encrypted
4094 directory tunnel without knowing a descriptor first. Still not
4095 ready yet. As part of the change, now assume we can use a
4096 create_fast cell if we don't know anything about a router.
4097 - Allow exit nodes to use nameservers running on ports other than 53.
4098 - Servers now cache reverse DNS replies.
4099 - Add an --ignore-missing-torrc command-line option so that we can
4100 get the "use sensible defaults if the configuration file doesn't
4101 exist" behavior even when specifying a torrc location on the command
4104 o Minor features (controller):
4105 - Track reasons for OR connection failure; make these reasons
4106 available via the controller interface. (Patch from Mike Perry.)
4107 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
4108 can learn when clients are sending malformed hostnames to Tor.
4109 - Clean up documentation for controller status events.
4110 - Add a REMAP status to stream events to note that a stream's
4111 address has changed because of a cached address or a MapAddress
4115 Changes in version 0.1.2.6-alpha - 2007-01-09
4117 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
4118 connection handles more than 4 gigs in either direction, we crash.
4119 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
4120 advertised exit node, somebody might try to exit from us when
4121 we're bootstrapping and before we've built our descriptor yet.
4122 Refuse the connection rather than crashing.
4125 - Warn if we (as a server) find that we've resolved an address that we
4126 weren't planning to resolve.
4127 - Warn that using select() on any libevent version before 1.1 will be
4128 unnecessarily slow (even for select()).
4129 - Flush ERR-level controller status events just like we currently
4130 flush ERR-level log events, so that a Tor shutdown doesn't prevent
4131 the controller from learning about current events.
4133 o Minor features (more controller status events):
4134 - Implement EXTERNAL_ADDRESS server status event so controllers can
4135 learn when our address changes.
4136 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
4137 can learn when directories reject our descriptor.
4138 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
4139 can learn when a client application is speaking a non-socks protocol
4141 - Implement DANGEROUS_SOCKS client status event so controllers
4142 can learn when a client application is leaking DNS addresses.
4143 - Implement BUG general status event so controllers can learn when
4144 Tor is unhappy about its internal invariants.
4145 - Implement CLOCK_SKEW general status event so controllers can learn
4146 when Tor thinks the system clock is set incorrectly.
4147 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
4148 server status events so controllers can learn when their descriptors
4149 are accepted by a directory.
4150 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
4151 server status events so controllers can learn about Tor's progress in
4152 deciding whether it's reachable from the outside.
4153 - Implement BAD_LIBEVENT general status event so controllers can learn
4154 when we have a version/method combination in libevent that needs to
4156 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
4157 and DNS_USELESS server status events so controllers can learn
4158 about changes to DNS server status.
4160 o Minor features (directory):
4161 - Authorities no longer recommend exits as guards if this would shift
4162 too much load to the exit nodes.
4165 Changes in version 0.1.2.5-alpha - 2007-01-06
4167 - Enable write limiting as well as read limiting. Now we sacrifice
4168 capacity if we're pushing out lots of directory traffic, rather
4169 than overrunning the user's intended bandwidth limits.
4170 - Include TLS overhead when counting bandwidth usage; previously, we
4171 would count only the bytes sent over TLS, but not the bytes used
4173 - Support running the Tor service with a torrc not in the same
4174 directory as tor.exe and default to using the torrc located in
4175 the %appdata%\Tor\ of the user who installed the service. Patch
4177 - Servers now check for the case when common DNS requests are going to
4178 wildcarded addresses (i.e. all getting the same answer), and change
4179 their exit policy to reject *:* if it's happening.
4180 - Implement BEGIN_DIR cells, so we can connect to the directory
4181 server via TLS to do encrypted directory requests rather than
4182 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
4183 config options if you like.
4185 o Minor features (config and docs):
4186 - Start using the state file to store bandwidth accounting data:
4187 the bw_accounting file is now obsolete. We'll keep generating it
4188 for a while for people who are still using 0.1.2.4-alpha.
4189 - Try to batch changes to the state file so that we do as few
4190 disk writes as possible while still storing important things in
4192 - The state file and the bw_accounting file get saved less often when
4193 the AvoidDiskWrites config option is set.
4194 - Make PIDFile work on Windows (untested).
4195 - Add internal descriptions for a bunch of configuration options:
4196 accessible via controller interface and in comments in saved
4198 - Reject *:563 (NNTPS) in the default exit policy. We already reject
4199 NNTP by default, so this seems like a sensible addition.
4200 - Clients now reject hostnames with invalid characters. This should
4201 avoid some inadvertent info leaks. Add an option
4202 AllowNonRFC953Hostnames to disable this behavior, in case somebody
4203 is running a private network with hosts called @, !, and #.
4204 - Add a maintainer script to tell us which options are missing
4205 documentation: "make check-docs".
4206 - Add a new address-spec.txt document to describe our special-case
4207 addresses: .exit, .onion, and .noconnnect.
4209 o Minor features (DNS):
4210 - Ongoing work on eventdns infrastructure: now it has dns server
4211 and ipv6 support. One day Tor will make use of it.
4212 - Add client-side caching for reverse DNS lookups.
4213 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
4214 - When we change nameservers or IP addresses, reset and re-launch
4215 our tests for DNS hijacking.
4217 o Minor features (directory):
4218 - Authorities now specify server versions in networkstatus. This adds
4219 about 2% to the size of compressed networkstatus docs, and allows
4220 clients to tell which servers support BEGIN_DIR and which don't.
4221 The implementation is forward-compatible with a proposed future
4222 protocol version scheme not tied to Tor versions.
4223 - DirServer configuration lines now have an orport= option so
4224 clients can open encrypted tunnels to the authorities without
4225 having downloaded their descriptors yet. Enabled for moria1,
4226 moria2, tor26, and lefkada now in the default configuration.
4227 - Directory servers are more willing to send a 503 "busy" if they
4228 are near their write limit, especially for v1 directory requests.
4229 Now they can use their limited bandwidth for actual Tor traffic.
4230 - Clients track responses with status 503 from dirservers. After a
4231 dirserver has given us a 503, we try not to use it until an hour has
4232 gone by, or until we have no dirservers that haven't given us a 503.
4233 - When we get a 503 from a directory, and we're not a server, we don't
4234 count the failure against the total number of failures allowed
4235 for the thing we're trying to download.
4236 - Report X-Your-Address-Is correctly from tunneled directory
4237 connections; don't report X-Your-Address-Is when it's an internal
4238 address; and never believe reported remote addresses when they're
4240 - Protect against an unlikely DoS attack on directory servers.
4241 - Add a BadDirectory flag to network status docs so that authorities
4242 can (eventually) tell clients about caches they believe to be
4245 o Minor features (controller):
4246 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
4247 - Reimplement GETINFO so that info/names stays in sync with the
4249 - Implement "GETINFO fingerprint".
4250 - Implement "SETEVENTS GUARD" so controllers can get updates on
4251 entry guard status as it changes.
4253 o Minor features (clean up obsolete pieces):
4254 - Remove some options that have been deprecated since at least
4255 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
4256 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
4258 - We no longer look for identity and onion keys in "identity.key" and
4259 "onion.key" -- these were replaced by secret_id_key and
4260 secret_onion_key in 0.0.8pre1.
4261 - We no longer require unrecognized directory entries to be
4264 o Major bugfixes (security):
4265 - Stop sending the HttpProxyAuthenticator string to directory
4266 servers when directory connections are tunnelled through Tor.
4267 - Clients no longer store bandwidth history in the state file.
4268 - Do not log introduction points for hidden services if SafeLogging
4270 - When generating bandwidth history, round down to the nearest
4271 1k. When storing accounting data, round up to the nearest 1k.
4272 - When we're running as a server, remember when we last rotated onion
4273 keys, so that we will rotate keys once they're a week old even if
4274 we never stay up for a week ourselves.
4276 o Major bugfixes (other):
4277 - Fix a longstanding bug in eventdns that prevented the count of
4278 timed-out resolves from ever being reset. This bug caused us to
4279 give up on a nameserver the third time it timed out, and try it
4280 10 seconds later... and to give up on it every time it timed out
4282 - Take out the '5 second' timeout from the connection retry
4283 schedule. Now the first connect attempt will wait a full 10
4284 seconds before switching to a new circuit. Perhaps this will help
4285 a lot. Based on observations from Mike Perry.
4286 - Fix a bug on the Windows implementation of tor_mmap_file() that
4287 would prevent the cached-routers file from ever loading. Reported
4291 - Fix an assert failure when a directory authority sets
4292 AuthDirRejectUnlisted and then receives a descriptor from an
4293 unlisted router. Reported by seeess.
4294 - Avoid a double-free when parsing malformed DirServer lines.
4295 - Fix a bug when a BSD-style PF socket is first used. Patch from
4297 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
4298 to resolve an address at a given exit node even when they ask for
4300 - Servers no longer ever list themselves in their "family" line,
4301 even if configured to do so. This makes it easier to configure
4302 family lists conveniently.
4303 - When running as a server, don't fall back to 127.0.0.1 when no
4304 nameservers are configured in /etc/resolv.conf; instead, make the
4305 user fix resolv.conf or specify nameservers explicitly. (Resolves
4307 - Stop accepting certain malformed ports in configured exit policies.
4308 - Don't re-write the fingerprint file every restart, unless it has
4310 - Stop warning when a single nameserver fails: only warn when _all_ of
4311 our nameservers have failed. Also, when we only have one nameserver,
4312 raise the threshold for deciding that the nameserver is dead.
4313 - Directory authorities now only decide that routers are reachable
4314 if their identity keys are as expected.
4315 - When the user uses bad syntax in the Log config line, stop
4316 suggesting other bad syntax as a replacement.
4317 - Correctly detect ipv6 DNS capability on OpenBSD.
4319 o Minor bugfixes (controller):
4320 - Report the circuit number correctly in STREAM CLOSED events. Bug
4321 reported by Mike Perry.
4322 - Do not report bizarre values for results of accounting GETINFOs
4323 when the last second's write or read exceeds the allotted bandwidth.
4324 - Report "unrecognized key" rather than an empty string when the
4325 controller tries to fetch a networkstatus that doesn't exist.
4328 Changes in version 0.1.1.26 - 2006-12-14
4329 o Security bugfixes:
4330 - Stop sending the HttpProxyAuthenticator string to directory
4331 servers when directory connections are tunnelled through Tor.
4332 - Clients no longer store bandwidth history in the state file.
4333 - Do not log introduction points for hidden services if SafeLogging
4337 - Fix an assert failure when a directory authority sets
4338 AuthDirRejectUnlisted and then receives a descriptor from an
4339 unlisted router (reported by seeess).
4342 Changes in version 0.1.2.4-alpha - 2006-12-03
4344 - Add support for using natd; this allows FreeBSDs earlier than
4345 5.1.2 to have ipfw send connections through Tor without using
4346 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
4349 - Make all connections to addresses of the form ".noconnect"
4350 immediately get closed. This lets application/controller combos
4351 successfully test whether they're talking to the same Tor by
4352 watching for STREAM events.
4353 - Make cross.sh cross-compilation script work even when autogen.sh
4354 hasn't been run. (Patch from Michael Mohr.)
4355 - Statistics dumped by -USR2 now include a breakdown of public key
4356 operations, for profiling.
4359 - Fix a major leak when directory authorities parse their
4360 approved-routers list, a minor memory leak when we fail to pick
4361 an exit node, and a few rare leaks on errors.
4362 - Handle TransPort connections even when the server sends data before
4363 the client sends data. Previously, the connection would just hang
4364 until the client sent data. (Patch from tup based on patch from
4366 - Avoid assert failure when our cached-routers file is empty on
4370 - Don't log spurious warnings when we see a circuit close reason we
4371 don't recognize; it's probably just from a newer version of Tor.
4372 - Have directory authorities allow larger amounts of drift in uptime
4373 without replacing the server descriptor: previously, a server that
4374 restarted every 30 minutes could have 48 "interesting" descriptors
4376 - Start linking to the Tor specification and Tor reference manual
4377 correctly in the Windows installer.
4378 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4379 Tor/Privoxy we also uninstall Vidalia.
4380 - Resume building on Irix64, and fix a lot of warnings from its
4382 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
4383 when we're running as a client.
4386 Changes in version 0.1.1.25 - 2006-11-04
4388 - When a client asks us to resolve (rather than connect to)
4389 an address, and we have a cached answer, give them the cached
4390 answer. Previously, we would give them no answer at all.
4391 - We were building exactly the wrong circuits when we predict
4392 hidden service requirements, meaning Tor would have to build all
4393 its circuits on demand.
4394 - If none of our live entry guards have a high uptime, but we
4395 require a guard with a high uptime, try adding a new guard before
4396 we give up on the requirement. This patch should make long-lived
4397 connections more stable on average.
4398 - When testing reachability of our DirPort, don't launch new
4399 tests when there's already one in progress -- unreachable
4400 servers were stacking up dozens of testing streams.
4402 o Security bugfixes:
4403 - When the user sends a NEWNYM signal, clear the client-side DNS
4404 cache too. Otherwise we continue to act on previous information.
4407 - Avoid a memory corruption bug when creating a hash table for
4409 - Avoid possibility of controller-triggered crash when misusing
4410 certain commands from a v0 controller on platforms that do not
4411 handle printf("%s",NULL) gracefully.
4412 - Avoid infinite loop on unexpected controller input.
4413 - Don't log spurious warnings when we see a circuit close reason we
4414 don't recognize; it's probably just from a newer version of Tor.
4415 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4416 Tor/Privoxy we also uninstall Vidalia.
4419 Changes in version 0.1.2.3-alpha - 2006-10-29
4421 - Prepare for servers to publish descriptors less often: never
4422 discard a descriptor simply for being too old until either it is
4423 recommended by no authorities, or until we get a better one for
4424 the same router. Make caches consider retaining old recommended
4425 routers for even longer.
4426 - If most authorities set a BadExit flag for a server, clients
4427 don't think of it as a general-purpose exit. Clients only consider
4428 authorities that advertise themselves as listing bad exits.
4429 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
4430 headers for content, so that we can work better in the presence of
4431 caching HTTP proxies.
4432 - Allow authorities to list nodes as bad exits by fingerprint or by
4435 o Minor features, controller:
4436 - Add a REASON field to CIRC events; for backward compatibility, this
4437 field is sent only to controllers that have enabled the extended
4438 event format. Also, add additional reason codes to explain why
4439 a given circuit has been destroyed or truncated. (Patches from
4441 - Add a REMOTE_REASON field to extended CIRC events to tell the
4442 controller about why a remote OR told us to close a circuit.
4443 - Stream events also now have REASON and REMOTE_REASON fields,
4444 working much like those for circuit events.
4445 - There's now a GETINFO ns/... field so that controllers can ask Tor
4446 about the current status of a router.
4447 - A new event type "NS" to inform a controller when our opinion of
4448 a router's status has changed.
4449 - Add a GETINFO events/names and GETINFO features/names so controllers
4450 can tell which events and features are supported.
4451 - A new CLEARDNSCACHE signal to allow controllers to clear the
4452 client-side DNS cache without expiring circuits.
4454 o Security bugfixes:
4455 - When the user sends a NEWNYM signal, clear the client-side DNS
4456 cache too. Otherwise we continue to act on previous information.
4459 - Avoid sending junk to controllers or segfaulting when a controller
4460 uses EVENT_NEW_DESC with verbose nicknames.
4461 - Stop triggering asserts if the controller tries to extend hidden
4462 service circuits (reported by mwenge).
4463 - Avoid infinite loop on unexpected controller input.
4464 - When the controller does a "GETINFO network-status", tell it
4465 about even those routers whose descriptors are very old, and use
4466 long nicknames where appropriate.
4467 - Change NT service functions to be loaded on demand. This lets us
4468 build with MinGW without breaking Tor for Windows 98 users.
4469 - Do DirPort reachability tests less often, since a single test
4470 chews through many circuits before giving up.
4471 - In the hidden service example in torrc.sample, stop recommending
4472 esoteric and discouraged hidden service options.
4473 - When stopping an NT service, wait up to 10 sec for it to actually
4474 stop. (Patch from Matt Edman; resolves bug 295.)
4475 - Fix handling of verbose nicknames with ORCONN controller events:
4476 make them show up exactly when requested, rather than exactly when
4478 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
4479 printing a duplicate "$" in the keys we send (reported by mwenge).
4480 - Correctly set maximum connection limit on Cygwin. (This time
4482 - Try to detect Windows correctly when cross-compiling.
4483 - Detect the size of the routers file correctly even if it is
4484 corrupted (on systems without mmap) or not page-aligned (on systems
4485 with mmap). This bug was harmless.
4486 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
4487 to open a stream fails; now we do in more cases. This should
4488 make clients able to find a good exit faster in some cases, since
4489 unhandleable requests will now get an error rather than timing out.
4490 - Resolve two memory leaks when rebuilding the on-disk router cache
4491 (reported by fookoowa).
4492 - Clean up minor code warnings suggested by the MIPSpro C compiler,
4493 and reported by some Centos users.
4494 - Controller signals now work on non-Unix platforms that don't define
4495 SIGUSR1 and SIGUSR2 the way we expect.
4496 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
4497 values before failing, and always enables eventdns.
4498 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
4499 Try to fix this in configure.in by checking for most functions
4500 before we check for libevent.
4503 Changes in version 0.1.2.2-alpha - 2006-10-07
4505 - Make our async eventdns library on-by-default for Tor servers,
4506 and plan to deprecate the separate dnsworker threads.
4507 - Add server-side support for "reverse" DNS lookups (using PTR
4508 records so clients can determine the canonical hostname for a given
4509 IPv4 address). Only supported by servers using eventdns; servers
4510 now announce in their descriptors whether they support eventdns.
4511 - Specify and implement client-side SOCKS5 interface for reverse DNS
4512 lookups (see doc/socks-extensions.txt).
4513 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
4514 connect to directory servers through Tor. Previously, clients needed
4515 to find Tor exits to make private connections to directory servers.
4516 - Avoid choosing Exit nodes for entry or middle hops when the
4517 total bandwidth available from non-Exit nodes is much higher than
4518 the total bandwidth available from Exit nodes.
4519 - Workaround for name servers (like Earthlink's) that hijack failing
4520 DNS requests and replace the no-such-server answer with a "helpful"
4521 redirect to an advertising-driven search portal. Also work around
4522 DNS hijackers who "helpfully" decline to hijack known-invalid
4523 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
4524 lets you turn it off.
4525 - Send out a burst of long-range padding cells once we've established
4526 that we're reachable. Spread them over 4 circuits, so hopefully
4527 a few will be fast. This exercises our bandwidth and bootstraps
4528 us into the directory more quickly.
4530 o New/improved config options:
4531 - Add new config option "ResolvConf" to let the server operator
4532 choose an alternate resolve.conf file when using eventdns.
4533 - Add an "EnforceDistinctSubnets" option to control our "exclude
4534 servers on the same /16" behavior. It's still on by default; this
4535 is mostly for people who want to operate private test networks with
4536 all the machines on the same subnet.
4537 - If one of our entry guards is on the ExcludeNodes list, or the
4538 directory authorities don't think it's a good guard, treat it as
4539 if it were unlisted: stop using it as a guard, and throw it off
4540 the guards list if it stays that way for a long time.
4541 - Allow directory authorities to be marked separately as authorities
4542 for the v1 directory protocol, the v2 directory protocol, and
4543 as hidden service directories, to make it easier to retire old
4544 authorities. V1 authorities should set "HSAuthoritativeDir 1"
4545 to continue being hidden service authorities too.
4546 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
4548 o Minor features, controller:
4549 - Fix CIRC controller events so that controllers can learn the
4550 identity digests of non-Named servers used in circuit paths.
4551 - Let controllers ask for more useful identifiers for servers. Instead
4552 of learning identity digests for un-Named servers and nicknames
4553 for Named servers, the new identifiers include digest, nickname,
4554 and indication of Named status. Off by default; see control-spec.txt
4555 for more information.
4556 - Add a "getinfo address" controller command so it can display Tor's
4557 best guess to the user.
4558 - New controller event to alert the controller when our server
4559 descriptor has changed.
4560 - Give more meaningful errors on controller authentication failure.
4562 o Minor features, other:
4563 - When asked to resolve a hostname, don't use non-exit servers unless
4564 requested to do so. This allows servers with broken DNS to be
4565 useful to the network.
4566 - Divide eventdns log messages into warn and info messages.
4567 - Reserve the nickname "Unnamed" for routers that can't pick
4568 a hostname: any router can call itself Unnamed; directory
4569 authorities will never allocate Unnamed to any particular router;
4570 clients won't believe that any router is the canonical Unnamed.
4571 - Only include function names in log messages for info/debug messages.
4572 For notice/warn/err, the content of the message should be clear on
4573 its own, and printing the function name only confuses users.
4574 - Avoid some false positives during reachability testing: don't try
4575 to test via a server that's on the same /24 as us.
4576 - If we fail to build a circuit to an intended enclave, and it's
4577 not mandatory that we use that enclave, stop wanting it.
4578 - When eventdns is enabled, allow multithreaded builds on NetBSD and
4579 OpenBSD. (We had previously disabled threads on these platforms
4580 because they didn't have working thread-safe resolver functions.)
4582 o Major bugfixes, anonymity/security:
4583 - If a client asked for a server by name, and there's a named server
4584 in our network-status but we don't have its descriptor yet, we
4585 could return an unnamed server instead.
4586 - Fix NetBSD bug that could allow someone to force uninitialized RAM
4587 to be sent to a server's DNS resolver. This only affects NetBSD
4588 and other platforms that do not bounds-check tolower().
4589 - Reject (most) attempts to use Tor circuits with length one. (If
4590 many people start using Tor as a one-hop proxy, exit nodes become
4591 a more attractive target for compromise.)
4592 - Just because your DirPort is open doesn't mean people should be
4593 able to remotely teach you about hidden service descriptors. Now
4594 only accept rendezvous posts if you've got HSAuthoritativeDir set.
4596 o Major bugfixes, other:
4597 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
4598 - When a client asks the server to resolve (not connect to)
4599 an address, and it has a cached answer, give them the cached answer.
4600 Previously, the server would give them no answer at all.
4601 - Allow really slow clients to not hang up five minutes into their
4602 directory downloads (suggested by Adam J. Richter).
4603 - We were building exactly the wrong circuits when we anticipated
4604 hidden service requirements, meaning Tor would have to build all
4605 its circuits on demand.
4606 - Avoid crashing when we mmap a router cache file of size 0.
4607 - When testing reachability of our DirPort, don't launch new
4608 tests when there's already one in progress -- unreachable
4609 servers were stacking up dozens of testing streams.
4611 o Minor bugfixes, correctness:
4612 - If we're a directory mirror and we ask for "all" network status
4613 documents, we would discard status documents from authorities
4615 - Avoid a memory corruption bug when creating a hash table for
4617 - Avoid controller-triggered crash when misusing certain commands
4618 from a v0 controller on platforms that do not handle
4619 printf("%s",NULL) gracefully.
4620 - Don't crash when a controller sends a third argument to an
4621 "extendcircuit" request.
4622 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4623 response; fix error code when "getinfo dir/status/" fails.
4624 - Avoid crash when telling controller stream-status and a stream
4626 - Patch from Adam Langley to fix assert() in eventdns.c.
4627 - Fix a debug log message in eventdns to say "X resolved to Y"
4628 instead of "X resolved to X".
4629 - Make eventdns give strings for DNS errors, not just error numbers.
4630 - Track unreachable entry guards correctly: don't conflate
4631 'unreachable by us right now' with 'listed as down by the directory
4632 authorities'. With the old code, if a guard was unreachable by
4633 us but listed as running, it would clog our guard list forever.
4634 - Behave correctly in case we ever have a network with more than
4635 2GB/s total advertised capacity.
4636 - Make TrackExitHosts case-insensitive, and fix the behavior of
4637 ".suffix" TrackExitHosts items to avoid matching in the middle of
4639 - Finally fix the openssl warnings from newer gccs that believe that
4640 ignoring a return value is okay, but casting a return value and
4641 then ignoring it is a sign of madness.
4642 - Prevent the contrib/exitlist script from printing the same
4643 result more than once.
4644 - Patch from Steve Hildrey: Generate network status correctly on
4645 non-versioning dirservers.
4646 - Don't listen to the X-Your-Address-Is hint if you did the lookup
4647 via Tor; otherwise you'll think you're the exit node's IP address.
4649 o Minor bugfixes, performance:
4650 - Two small performance improvements on parsing descriptors.
4651 - Major performance improvement on inserting descriptors: change
4652 algorithm from O(n^2) to O(n).
4653 - Make the common memory allocation path faster on machines where
4654 malloc(0) returns a pointer.
4655 - Start remembering X-Your-Address-Is directory hints even if you're
4656 a client, so you can become a server more smoothly.
4657 - Avoid duplicate entries on MyFamily line in server descriptor.
4659 o Packaging, features:
4660 - Remove architecture from OS X builds. The official builds are
4661 now universal binaries.
4662 - The Debian package now uses --verify-config when (re)starting,
4663 to distinguish configuration errors from other errors.
4664 - Update RPMs to require libevent 1.1b.
4666 o Packaging, bugfixes:
4667 - Patches so Tor builds with MinGW on Windows.
4668 - Patches so Tor might run on Cygwin again.
4669 - Resume building on non-gcc compilers and ancient gcc. Resume
4670 building with the -O0 compile flag. Resume building cleanly on
4672 - Run correctly on OS X platforms with case-sensitive filesystems.
4673 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
4674 - Add autoconf checks so Tor can build on Solaris x86 again.
4677 - Documented (and renamed) ServerDNSSearchDomains and
4678 ServerDNSResolvConfFile options.
4679 - Be clearer that the *ListenAddress directives can be repeated
4683 Changes in version 0.1.1.24 - 2006-09-29
4685 - Allow really slow clients to not hang up five minutes into their
4686 directory downloads (suggested by Adam J. Richter).
4687 - Fix major performance regression from 0.1.0.x: instead of checking
4688 whether we have enough directory information every time we want to
4689 do something, only check when the directory information has changed.
4690 This should improve client CPU usage by 25-50%.
4691 - Don't crash if, after a server has been running for a while,
4692 it can't resolve its hostname.
4695 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4696 - Don't crash when the controller receives a third argument to an
4697 "extendcircuit" request.
4698 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4699 response; fix error code when "getinfo dir/status/" fails.
4700 - Fix configure.in to not produce broken configure files with
4701 more recent versions of autoconf. Thanks to Clint for his auto*
4703 - Fix security bug on NetBSD that could allow someone to force
4704 uninitialized RAM to be sent to a server's DNS resolver. This
4705 only affects NetBSD and other platforms that do not bounds-check
4707 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
4708 methods: these are known to be buggy.
4709 - If we're a directory mirror and we ask for "all" network status
4710 documents, we would discard status documents from authorities
4714 Changes in version 0.1.2.1-alpha - 2006-08-27
4716 - Add "eventdns" async dns library from Adam Langley, tweaked to
4717 build on OSX and Windows. Only enabled if you pass the
4718 --enable-eventdns argument to configure.
4719 - Allow servers with no hostname or IP address to learn their
4720 IP address by asking the directory authorities. This code only
4721 kicks in when you would normally have exited with a "no address"
4722 error. Nothing's authenticated, so use with care.
4723 - Rather than waiting a fixed amount of time between retrying
4724 application connections, we wait only 5 seconds for the first,
4725 10 seconds for the second, and 15 seconds for each retry after
4726 that. Hopefully this will improve the expected user experience.
4727 - Patch from Tup to add support for transparent AP connections:
4728 this basically bundles the functionality of trans-proxy-tor
4729 into the Tor mainline. Now hosts with compliant pf/netfilter
4730 implementations can redirect TCP connections straight to Tor
4731 without diverting through SOCKS. Needs docs.
4732 - Busy directory servers save lots of memory by spooling server
4733 descriptors, v1 directories, and v2 networkstatus docs to buffers
4734 as needed rather than en masse. Also mmap the cached-routers
4735 files, so we don't need to keep the whole thing in memory too.
4736 - Automatically avoid picking more than one node from the same
4737 /16 network when constructing a circuit.
4738 - Revise and clean up the torrc.sample that we ship with; add
4739 a section for BandwidthRate and BandwidthBurst.
4742 - Split circuit_t into origin_circuit_t and or_circuit_t, and
4743 split connection_t into edge, or, dir, control, and base structs.
4744 These will save quite a bit of memory on busy servers, and they'll
4745 also help us track down bugs in the code and bugs in the spec.
4746 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
4747 or later. Log when we are doing this, so we can diagnose it when
4748 it fails. (Also, recommend libevent 1.1b for kqueue and
4749 win32 methods; deprecate libevent 1.0b harder; make libevent
4750 recommendation system saner.)
4751 - Start being able to build universal binaries on OS X (thanks
4753 - Export the default exit policy via the control port, so controllers
4754 don't need to guess what it is / will be later.
4755 - Add a man page entry for ProtocolWarnings.
4756 - Add TestVia config option to the man page.
4757 - Remove even more protocol-related warnings from Tor server logs,
4758 such as bad TLS handshakes and malformed begin cells.
4759 - Stop fetching descriptors if you're not a dir mirror and you
4760 haven't tried to establish any circuits lately. [This currently
4761 causes some dangerous behavior, because when you start up again
4762 you'll use your ancient server descriptors.]
4763 - New DirPort behavior: if you have your dirport set, you download
4764 descriptors aggressively like a directory mirror, whether or not
4766 - Get rid of the router_retry_connections notion. Now routers
4767 no longer try to rebuild long-term connections to directory
4768 authorities, and directory authorities no longer try to rebuild
4769 long-term connections to all servers. We still don't hang up
4770 connections in these two cases though -- we need to look at it
4771 more carefully to avoid flapping, and we likely need to wait til
4772 0.1.1.x is obsolete.
4773 - Drop compatibility with obsolete Tors that permit create cells
4774 to have the wrong circ_id_type.
4775 - Re-enable per-connection rate limiting. Get rid of the "OP
4776 bandwidth" concept. Lay groundwork for "bandwidth classes" --
4777 separate global buckets that apply depending on what sort of conn
4779 - Start publishing one minute or so after we find our ORPort
4780 to be reachable. This will help reduce the number of descriptors
4781 we have for ourselves floating around, since it's quite likely
4782 other things (e.g. DirPort) will change during that minute too.
4783 - Fork the v1 directory protocol into its own spec document,
4784 and mark dir-spec.txt as the currently correct (v2) spec.
4787 - When we find our DirPort to be reachable, publish a new descriptor
4788 so we'll tell the world (reported by pnx).
4789 - Publish a new descriptor after we hup/reload. This is important
4790 if our config has changed such that we'll want to start advertising
4791 our DirPort now, etc.
4792 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4793 - When we have a state file we cannot parse, tell the user and
4794 move it aside. Now we avoid situations where the user starts
4795 Tor in 1904, Tor writes a state file with that timestamp in it,
4796 the user fixes her clock, and Tor refuses to start.
4797 - Fix configure.in to not produce broken configure files with
4798 more recent versions of autoconf. Thanks to Clint for his auto*
4800 - "tor --verify-config" now exits with -1(255) or 0 depending on
4801 whether the config options are bad or good.
4802 - Resolve bug 321 when using dnsworkers: append a period to every
4803 address we resolve at the exit node, so that we do not accidentally
4804 pick up local addresses, and so that failing searches are retried
4805 in the resolver search domains. (This is already solved for
4806 eventdns.) (This breaks Blossom servers for now.)
4807 - If we are using an exit enclave and we can't connect, e.g. because
4808 its webserver is misconfigured to not listen on localhost, then
4809 back off and try connecting from somewhere else before we fail.
4812 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
4813 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
4814 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
4815 when the IP address is mapped through MapAddress to a hostname.
4816 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
4817 useless IPv6 DNS resolves.
4818 - Patch suggested by Karsten Loesing: respond to SIGNAL command
4819 before we execute the signal, in case the signal shuts us down.
4820 - Clean up AllowInvalidNodes man page entry.
4821 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
4822 - Add more asserts to track down an assert error on a windows Tor
4823 server with connection_add being called with socket == -1.
4824 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
4825 - Fix misleading log messages: an entry guard that is "unlisted",
4826 as well as not known to be "down" (because we've never heard
4827 of it), is not therefore "up".
4828 - Remove code to special-case "-cvs" ending, since it has not
4829 actually mattered since 0.0.9.
4830 - Make our socks5 handling more robust to broken socks clients:
4831 throw out everything waiting on the buffer in between socks
4832 handshake phases, since they can't possibly (so the theory
4833 goes) have predicted what we plan to respond to them.
4836 Changes in version 0.1.1.23 - 2006-07-30
4838 - Fast Tor servers, especially exit nodes, were triggering asserts
4839 due to a bug in handling the list of pending DNS resolves. Some
4840 bugs still remain here; we're hunting them.
4841 - Entry guards could crash clients by sending unexpected input.
4842 - More fixes on reachability testing: if you find yourself reachable,
4843 then don't ever make any client requests (so you stop predicting
4844 circuits), then hup or have your clock jump, then later your IP
4845 changes, you won't think circuits are working, so you won't try to
4846 test reachability, so you won't publish.
4849 - Avoid a crash if the controller does a resetconf firewallports
4850 and then a setconf fascistfirewall=1.
4851 - Avoid an integer underflow when the dir authority decides whether
4852 a router is stable: we might wrongly label it stable, and compute
4853 a slightly wrong median stability, when a descriptor is published
4855 - Fix a place where we might trigger an assert if we can't build our
4856 own server descriptor yet.
4859 Changes in version 0.1.1.22 - 2006-07-05
4861 - Fix a big bug that was causing servers to not find themselves
4862 reachable if they changed IP addresses. Since only 0.1.1.22+
4863 servers can do reachability testing correctly, now we automatically
4864 make sure to test via one of these.
4865 - Fix to allow clients and mirrors to learn directory info from
4866 descriptor downloads that get cut off partway through.
4867 - Directory authorities had a bug in deciding if a newly published
4868 descriptor was novel enough to make everybody want a copy -- a few
4869 servers seem to be publishing new descriptors many times a minute.
4871 - Fix a rare bug that was causing some servers to complain about
4872 "closing wedged cpuworkers" and skip some circuit create requests.
4873 - Make the Exit flag in directory status documents actually work.
4876 Changes in version 0.1.1.21 - 2006-06-10
4877 o Crash and assert fixes from 0.1.1.20:
4878 - Fix a rare crash on Tor servers that have enabled hibernation.
4879 - Fix a seg fault on startup for Tor networks that use only one
4880 directory authority.
4881 - Fix an assert from a race condition that occurs on Tor servers
4882 while exiting, where various threads are trying to log that they're
4883 exiting, and delete the logs, at the same time.
4884 - Make our unit tests pass again on certain obscure platforms.
4887 - Add support for building SUSE RPM packages.
4888 - Speed up initial bootstrapping for clients: if we are making our
4889 first ever connection to any entry guard, then don't mark it down
4891 - When only one Tor server in the network is labelled as a guard,
4892 and we've already picked him, we would cycle endlessly picking him
4893 again, being unhappy about it, etc. Now we specifically exclude
4894 current guards when picking a new guard.
4895 - Servers send create cells more reliably after the TLS connection
4896 is established: we were sometimes forgetting to send half of them
4897 when we had more than one pending.
4898 - If we get a create cell that asks us to extend somewhere, but the
4899 Tor server there doesn't match the expected digest, we now send
4900 a destroy cell back, rather than silently doing nothing.
4901 - Make options->RedirectExit work again.
4902 - Make cookie authentication for the controller work again.
4903 - Stop being picky about unusual characters in the arguments to
4904 mapaddress. It's none of our business.
4905 - Add a new config option "TestVia" that lets you specify preferred
4906 middle hops to use for test circuits. Perhaps this will let me
4907 debug the reachability problems better.
4909 o Log / documentation fixes:
4910 - If we're a server and some peer has a broken TLS certificate, don't
4911 log about it unless ProtocolWarnings is set, i.e., we want to hear
4912 about protocol violations by others.
4913 - Fix spelling of VirtualAddrNetwork in man page.
4914 - Add a better explanation at the top of the autogenerated torrc file
4915 about what happened to our old torrc.
4918 Changes in version 0.1.1.20 - 2006-05-23
4920 - Downgrade a log severity where servers complain that they're
4922 - Avoid a compile warning on FreeBSD.
4923 - Remove string size limit on NEWDESC messages; solve bug 291.
4924 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
4925 more thoroughly when we're running on windows.
4928 Changes in version 0.1.1.19-rc - 2006-05-03
4930 - Regenerate our local descriptor if it's dirty and we try to use
4931 it locally (e.g. if it changes during reachability detection).
4932 - If we setconf our ORPort to 0, we continued to listen on the
4933 old ORPort and receive connections.
4934 - Avoid a second warning about machine/limits.h on Debian
4936 - Be willing to add our own routerinfo into the routerlist.
4937 Now authorities will include themselves in their directories
4938 and network-statuses.
4939 - Stop trying to upload rendezvous descriptors to every
4940 directory authority: only try the v1 authorities.
4941 - Servers no longer complain when they think they're not
4942 registered with the directory authorities. There were too many
4944 - Backport dist-rpm changes so rpms can be built without errors.
4947 - Implement an option, VirtualAddrMask, to set which addresses
4948 get handed out in response to mapaddress requests. This works
4949 around a bug in tsocks where 127.0.0.0/8 is never socksified.
4952 Changes in version 0.1.1.18-rc - 2006-04-10
4954 - Work harder to download live network-statuses from all the
4955 directory authorities we know about. Improve the threshold
4956 decision logic so we're more robust to edge cases.
4957 - When fetching rendezvous descriptors, we were willing to ask
4958 v2 authorities too, which would always return 404.
4961 - Stop listing down or invalid nodes in the v1 directory. This will
4962 reduce its bulk by about 1/3, and reduce load on directory
4964 - When deciding whether a router is Fast or Guard-worthy, consider
4965 his advertised BandwidthRate and not just the BandwidthCapacity.
4966 - No longer ship INSTALL and README files -- they are useless now.
4967 - Force rpmbuild to behave and honor target_cpu.
4968 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
4969 - Start to include translated versions of the tor-doc-*.html
4970 files, along with the screenshots. Still needs more work.
4971 - Start sending back 512 and 451 errors if mapaddress fails,
4972 rather than not sending anything back at all.
4973 - When we fail to bind or listen on an incoming or outgoing
4974 socket, we should close it before failing. otherwise we just
4975 leak it. (thanks to weasel for finding.)
4976 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
4977 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
4978 - Make NoPublish (even though deprecated) work again.
4979 - Fix a minor security flaw where a versioning auth dirserver
4980 could list a recommended version many times in a row to make
4981 clients more convinced that it's recommended.
4982 - Fix crash bug if there are two unregistered servers running
4983 with the same nickname, one of them is down, and you ask for
4984 them by nickname in your EntryNodes or ExitNodes. Also, try
4985 to pick the one that's running rather than an arbitrary one.
4986 - Fix an infinite loop we could hit if we go offline for too long.
4987 - Complain when we hit WSAENOBUFS on recv() or write() too.
4988 Perhaps this will help us hunt the bug.
4989 - If you're not a versioning dirserver, don't put the string
4990 "client-versions \nserver-versions \n" in your network-status.
4991 - Lower the minimum required number of file descriptors to 1000,
4992 so we can have some overhead for Valgrind on Linux, where the
4993 default ulimit -n is 1024.
4996 - Add tor.dizum.com as the fifth authoritative directory server.
4997 - Add a new config option FetchUselessDescriptors, off by default,
4998 for when you plan to run "exitlist" on your client and you want
4999 to know about even the non-running descriptors.
5002 Changes in version 0.1.1.17-rc - 2006-03-28
5004 - Clients and servers since 0.1.1.10-alpha have been expiring
5005 connections whenever they are idle for 5 minutes and they *do*
5006 have circuits on them. Oops. With this new version, clients will
5007 discard their previous entry guard choices and avoid choosing
5008 entry guards running these flawed versions.
5009 - Fix memory leak when uncompressing concatenated zlib streams. This
5010 was causing substantial leaks over time on Tor servers.
5011 - The v1 directory was including servers as much as 48 hours old,
5012 because that's how the new routerlist->routers works. Now only
5013 include them if they're 20 hours old or less.
5016 - Resume building on irix64, netbsd 2.0, etc.
5017 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
5019 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
5020 and it is confusing some users.
5021 - Mirrors stop caching the v1 directory so often.
5022 - Make the max number of old descriptors that a cache will hold
5023 rise with the number of directory authorities, so we can scale.
5024 - Change our win32 uname() hack to be more forgiving about what
5025 win32 versions it thinks it's found.
5028 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
5030 - When the controller's *setconf commands fail, collect an error
5031 message in a string and hand it back to the controller.
5032 - Make the v2 dir's "Fast" flag based on relative capacity, just
5033 like "Stable" is based on median uptime. Name everything in the
5034 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
5035 - Log server fingerprint on startup, so new server operators don't
5036 have to go hunting around their filesystem for it.
5037 - Return a robots.txt on our dirport to discourage google indexing.
5038 - Let the controller ask for GETINFO dir/status/foo so it can ask
5039 directly rather than connecting to the dir port. Only works when
5040 dirport is set for now.
5042 o New config options rather than constants in the code:
5043 - SocksTimeout: How long do we let a socks connection wait
5044 unattached before we fail it?
5045 - CircuitBuildTimeout: Cull non-open circuits that were born
5046 at least this many seconds ago.
5047 - CircuitIdleTimeout: Cull open clean circuits that were born
5048 at least this many seconds ago.
5051 Changes in version 0.1.1.16-rc - 2006-03-18
5052 o Bugfixes on 0.1.1.15-rc:
5053 - Fix assert when the controller asks to attachstream a connect-wait
5054 or resolve-wait stream.
5055 - Now do address rewriting when the controller asks us to attach
5056 to a particular circuit too. This will let Blossom specify
5057 "moria2.exit" without having to learn what moria2's IP address is.
5058 - Make the "tor --verify-config" command-line work again, so people
5059 can automatically check if their torrc will parse.
5060 - Authoritative dirservers no longer require an open connection from
5061 a server to consider him "reachable". We need this change because
5062 when we add new auth dirservers, old servers won't know not to
5064 - Let Tor build on Sun CC again.
5065 - Fix an off-by-one buffer size in dirserv.c that magically never
5066 hit our three authorities but broke sjmurdoch's own tor network.
5067 - If we as a directory mirror don't know of any v1 directory
5068 authorities, then don't try to cache any v1 directories.
5069 - Stop warning about unknown servers in our family when they are
5070 given as hex digests.
5071 - Stop complaining as quickly to the server operator that he
5072 hasn't registered his nickname/key binding.
5073 - Various cleanups so we can add new V2 Auth Dirservers.
5074 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
5075 reflect the updated flags in our v2 dir protocol.
5076 - Resume allowing non-printable characters for exit streams (both
5077 for connecting and for resolving). Now we tolerate applications
5078 that don't follow the RFCs. But continue to block malformed names
5081 o Bugfixes on 0.1.0.x:
5082 - Fix assert bug in close_logs(): when we close and delete logs,
5083 remove them all from the global "logfiles" list.
5084 - Fix minor integer overflow in calculating when we expect to use up
5085 our bandwidth allocation before hibernating.
5086 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
5087 there are multiple SSLs installed with different versions.
5088 - When we try to be a server and Address is not explicitly set and
5089 our hostname resolves to a private IP address, try to use an
5090 interface address if it has a public address. Now Windows machines
5091 that think of themselves as localhost can work by default.
5094 - Let the controller ask for GETINFO dir/server/foo so it can ask
5095 directly rather than connecting to the dir port.
5096 - Let the controller tell us about certain router descriptors
5097 that it doesn't want Tor to use in circuits. Implement
5098 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
5099 - New config option SafeSocks to reject all application connections
5100 using unsafe socks protocols. Defaults to off.
5103 Changes in version 0.1.1.15-rc - 2006-03-11
5104 o Bugfixes and cleanups:
5105 - When we're printing strings from the network, don't try to print
5106 non-printable characters. This protects us against shell escape
5107 sequence exploits, and also against attacks to fool humans into
5108 misreading their logs.
5109 - Fix a bug where Tor would fail to establish any connections if you
5110 left it off for 24 hours and then started it: we were happy with
5111 the obsolete network statuses, but they all referred to router
5112 descriptors that were too old to fetch, so we ended up with no
5113 valid router descriptors.
5114 - Fix a seg fault in the controller's "getinfo orconn-status"
5115 command while listing status on incoming handshaking connections.
5116 Introduce a status name "NEW" for these connections.
5117 - If we get a linelist or linelist_s config option from the torrc
5118 (e.g. ExitPolicy) and it has no value, warn and skip rather than
5119 silently resetting it to its default.
5120 - Don't abandon entry guards until they've been down or gone for
5122 - Cleaner and quieter log messages.
5125 - New controller signal NEWNYM that makes new application requests
5127 - Add a new circuit purpose 'controller' to let the controller ask
5128 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
5129 controller command to let you specify the purpose if you're
5130 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
5131 command to let you change a circuit's purpose after it's been
5133 - Accept "private:*" in routerdesc exit policies; not generated yet
5134 because older Tors do not understand it.
5135 - Add BSD-style contributed startup script "rc.subr" from Peter
5139 Changes in version 0.1.1.14-alpha - 2006-02-20
5140 o Bugfixes on 0.1.1.x:
5141 - Don't die if we ask for a stdout or stderr log (even implicitly)
5142 and we're set to RunAsDaemon -- just warn.
5143 - We still had a few bugs in the OR connection rotation code that
5144 caused directory servers to slowly aggregate connections to other
5145 fast Tor servers. This time for sure!
5146 - Make log entries on Win32 include the name of the function again.
5147 - We were treating a pair of exit policies if they were equal even
5148 if one said accept and the other said reject -- causing us to
5149 not always publish a new descriptor since we thought nothing
5151 - Retry pending server downloads as well as pending networkstatus
5152 downloads when we unexpectedly get a socks request.
5153 - We were ignoring the IS_FAST flag in the directory status,
5154 meaning we were willing to pick trivial-bandwidth nodes for "fast"
5156 - If the controller's SAVECONF command fails (e.g. due to file
5157 permissions), let the controller know that it failed.
5160 - If we're trying to be a Tor server and running Windows 95/98/ME
5161 as a server, explain that we'll likely crash.
5162 - When we're a server, a client asks for an old-style directory,
5163 and our write bucket is empty, don't give it to him. This way
5164 small servers can continue to serve the directory *sometimes*,
5165 without getting overloaded.
5166 - Compress exit policies even more -- look for duplicate lines
5168 - Clients now honor the "guard" flag in the router status when
5169 picking entry guards, rather than looking at is_fast or is_stable.
5170 - Retain unrecognized lines in $DATADIR/state file, so that we can
5171 be forward-compatible.
5172 - Generate 18.0.0.0/8 address policy format in descs when we can;
5173 warn when the mask is not reducible to a bit-prefix.
5174 - Let the user set ControlListenAddress in the torrc. This can be
5175 dangerous, but there are some cases (like a secured LAN) where it
5177 - Split ReachableAddresses into ReachableDirAddresses and
5178 ReachableORAddresses, so we can restrict Dir conns to port 80
5179 and OR conns to port 443.
5180 - Now we can target arch and OS in rpm builds (contributed by
5181 Phobos). Also make the resulting dist-rpm filename match the
5183 - New config options to help controllers: FetchServerDescriptors
5184 and FetchHidServDescriptors for whether to fetch server
5185 info and hidserv info or let the controller do it, and
5186 PublishServerDescriptor and PublishHidServDescriptors.
5187 - Also let the controller set the __AllDirActionsPrivate config
5188 option if you want all directory fetches/publishes to happen via
5189 Tor (it assumes your controller bootstraps your circuits).
5192 Changes in version 0.1.0.17 - 2006-02-17
5193 o Crash bugfixes on 0.1.0.x:
5194 - When servers with a non-zero DirPort came out of hibernation,
5195 sometimes they would trigger an assert.
5197 o Other important bugfixes:
5198 - On platforms that don't have getrlimit (like Windows), we were
5199 artificially constraining ourselves to a max of 1024
5200 connections. Now just assume that we can handle as many as 15000
5201 connections. Hopefully this won't cause other problems.
5203 o Backported features:
5204 - When we're a server, a client asks for an old-style directory,
5205 and our write bucket is empty, don't give it to him. This way
5206 small servers can continue to serve the directory *sometimes*,
5207 without getting overloaded.
5208 - Whenever you get a 503 in response to a directory fetch, try
5209 once more. This will become important once servers start sending
5210 503's whenever they feel busy.
5211 - Fetch a new directory every 120 minutes, not every 40 minutes.
5212 Now that we have hundreds of thousands of users running the old
5213 directory algorithm, it's starting to hurt a lot.
5214 - Bump up the period for forcing a hidden service descriptor upload
5215 from 20 minutes to 1 hour.
5218 Changes in version 0.1.1.13-alpha - 2006-02-09
5219 o Crashes in 0.1.1.x:
5220 - When you tried to setconf ORPort via the controller, Tor would
5221 crash. So people using TorCP to become a server were sad.
5222 - Solve (I hope) the stack-smashing bug that we were seeing on fast
5223 servers. The problem appears to be something do with OpenSSL's
5224 random number generation, or how we call it, or something. Let me
5225 know if the crashes continue.
5226 - Turn crypto hardware acceleration off by default, until we find
5227 somebody smart who can test it for us. (It appears to produce
5228 seg faults in at least some cases.)
5229 - Fix a rare assert error when we've tried all intro points for
5230 a hidden service and we try fetching the service descriptor again:
5231 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
5234 - Fix a major load balance bug: we were round-robining in 16 KB
5235 chunks, and servers with bandwidthrate of 20 KB, while downloading
5236 a 600 KB directory, would starve their other connections. Now we
5237 try to be a bit more fair.
5238 - Dir authorities and mirrors were never expiring the newest
5239 descriptor for each server, causing memory and directory bloat.
5240 - Fix memory-bloating and connection-bloating bug on servers: We
5241 were never closing any connection that had ever had a circuit on
5242 it, because we were checking conn->n_circuits == 0, yet we had a
5243 bug that let it go negative.
5244 - Make Tor work using squid as your http proxy again -- squid
5245 returns an error if you ask for a URL that's too long, and it uses
5246 a really generic error message. Plus, many people are behind a
5247 transparent squid so they don't even realize it.
5248 - On platforms that don't have getrlimit (like Windows), we were
5249 artificially constraining ourselves to a max of 1024
5250 connections. Now just assume that we can handle as many as 15000
5251 connections. Hopefully this won't cause other problems.
5252 - Add a new config option ExitPolicyRejectPrivate which defaults to
5253 1. This means all exit policies will begin with rejecting private
5254 addresses, unless the server operator explicitly turns it off.
5257 - Clients no longer download descriptors for non-running
5259 - Before we add new directory authorities, we should make it
5260 clear that only v1 authorities should receive/publish hidden
5261 service descriptors.
5264 - As soon as we've fetched some more directory info, immediately
5265 try to download more server descriptors. This way we don't have
5266 a 10 second pause during initial bootstrapping.
5267 - Remove even more loud log messages that the server operator can't
5269 - When we're running an obsolete or un-recommended version, make
5270 the log message more clear about what the problem is and what
5271 versions *are* still recommended.
5272 - Provide a more useful warn message when our onion queue gets full:
5273 the CPU is too slow or the exit policy is too liberal.
5274 - Don't warn when we receive a 503 from a dirserver/cache -- this
5275 will pave the way for them being able to refuse if they're busy.
5276 - When we fail to bind a listener, try to provide a more useful
5277 log message: e.g., "Is Tor already running?"
5278 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
5279 Goldberg can prove things about our handshake protocol more
5281 - MaxConn has been obsolete for a while now. Document the ConnLimit
5282 config option, which is a *minimum* number of file descriptors
5283 that must be available else Tor refuses to start.
5284 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
5285 if you log to syslog and want something other than LOG_DAEMON.
5286 - Make dirservers generate a separate "guard" flag to mean,
5287 "would make a good entry guard". Make clients parse it and vote
5288 on it. Not used by clients yet.
5289 - Implement --with-libevent-dir option to ./configure. Also, improve
5290 search techniques to find libevent, and use those for openssl too.
5291 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
5292 - Only start testing reachability once we've established a
5293 circuit. This will make startup on dirservers less noisy.
5294 - Don't try to upload hidden service descriptors until we have
5295 established a circuit.
5296 - Fix the controller's "attachstream 0" command to treat conn like
5297 it just connected, doing address remapping, handling .exit and
5298 .onion idioms, and so on. Now we're more uniform in making sure
5299 that the controller hears about new and closing connections.
5302 Changes in version 0.1.1.12-alpha - 2006-01-11
5303 o Bugfixes on 0.1.1.x:
5304 - The fix to close duplicate server connections was closing all
5305 Tor client connections if they didn't establish a circuit
5306 quickly enough. Oops.
5307 - Fix minor memory issue (double-free) that happened on exit.
5309 o Bugfixes on 0.1.0.x:
5310 - Tor didn't warn when it failed to open a log file.
5313 Changes in version 0.1.1.11-alpha - 2006-01-10
5314 o Crashes in 0.1.1.x:
5315 - Include all the assert/crash fixes from 0.1.0.16.
5316 - If you start Tor and then quit very quickly, there were some
5317 races that tried to free things that weren't allocated yet.
5318 - Fix a rare memory stomp if you're running hidden services.
5319 - Fix segfault when specifying DirServer in config without nickname.
5320 - Fix a seg fault when you finish connecting to a server but at
5321 that moment you dump his server descriptor.
5322 - Extendcircuit and Attachstream controller commands would
5323 assert/crash if you don't give them enough arguments.
5324 - Fix an assert error when we're out of space in the connection_list
5325 and we try to post a hidden service descriptor (reported by weasel).
5326 - If you specify a relative torrc path and you set RunAsDaemon in
5327 your torrc, then it chdir()'s to the new directory. If you HUP,
5328 it tries to load the new torrc location, fails, and exits.
5329 The fix: no longer allow a relative path to torrc using -f.
5332 - Implement "entry guards": automatically choose a handful of entry
5333 nodes and stick with them for all circuits. Only pick new guards
5334 when the ones you have are unsuitable, and if the old guards
5335 become suitable again, switch back. This will increase security
5336 dramatically against certain end-point attacks. The EntryNodes
5337 config option now provides some hints about which entry guards you
5338 want to use most; and StrictEntryNodes means to only use those.
5339 - New directory logic: download by descriptor digest, not by
5340 fingerprint. Caches try to download all listed digests from
5341 authorities; clients try to download "best" digests from caches.
5342 This avoids partitioning and isolating attacks better.
5343 - Make the "stable" router flag in network-status be the median of
5344 the uptimes of running valid servers, and make clients pay
5345 attention to the network-status flags. Thus the cutoff adapts
5346 to the stability of the network as a whole, making IRC, IM, etc
5347 connections more reliable.
5350 - Tor servers with dynamic IP addresses were needing to wait 18
5351 hours before they could start doing reachability testing using
5352 the new IP address and ports. This is because they were using
5353 the internal descriptor to learn what to test, yet they were only
5354 rebuilding the descriptor once they decided they were reachable.
5355 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
5356 to download certain server descriptors, throw them away, and then
5357 fetch them again after 30 minutes. Now mirrors throw away these
5358 server descriptors so clients can't get them.
5359 - We were leaving duplicate connections to other ORs open for a week,
5360 rather than closing them once we detect a duplicate. This only
5361 really affected authdirservers, but it affected them a lot.
5362 - Spread the authdirservers' reachability testing over the entire
5363 testing interval, so we don't try to do 500 TLS's at once every
5367 - If the network is down, and we try to connect to a conn because
5368 we have a circuit in mind, and we timeout (30 seconds) because the
5369 network never answers, we were expiring the circuit, but we weren't
5370 obsoleting the connection or telling the entry_guards functions.
5371 - Some Tor servers process billions of cells per day. These statistics
5372 need to be uint64_t's.
5373 - Check for integer overflows in more places, when adding elements
5374 to smartlists. This could possibly prevent a buffer overflow
5375 on malicious huge inputs. I don't see any, but I haven't looked
5377 - ReachableAddresses kept growing new "reject *:*" lines on every
5379 - When you "setconf log" via the controller, it should remove all
5380 logs. We were automatically adding back in a "log notice stdout".
5381 - Newly bootstrapped Tor networks couldn't establish hidden service
5382 circuits until they had nodes with high uptime. Be more tolerant.
5383 - We were marking servers down when they could not answer every piece
5384 of the directory request we sent them. This was far too harsh.
5385 - Fix the torify (tsocks) config file to not use Tor for localhost
5387 - Directory authorities now go to the proper authority when asking for
5388 a networkstatus, even when they want a compressed one.
5389 - Fix a harmless bug that was causing Tor servers to log
5390 "Got an end because of misc error, but we're not an AP. Closing."
5391 - Authorities were treating their own descriptor changes as cosmetic,
5392 meaning the descriptor available in the network-status and the
5393 descriptor that clients downloaded were different.
5394 - The OS X installer was adding a symlink for tor_resolve but
5395 the binary was called tor-resolve (reported by Thomas Hardly).
5396 - Workaround a problem with some http proxies where they refuse GET
5397 requests that specify "Content-Length: 0" (reported by Adrian).
5398 - Fix wrong log message when you add a "HiddenServiceNodes" config
5399 line without any HiddenServiceDir line (reported by Chris Thomas).
5402 - Write the TorVersion into the state file so we have a prayer of
5403 keeping forward and backward compatibility.
5404 - Revive the FascistFirewall config option rather than eliminating it:
5405 now it's a synonym for ReachableAddresses *:80,*:443.
5406 - Clients choose directory servers from the network status lists,
5407 not from their internal list of router descriptors. Now they can
5408 go to caches directly rather than needing to go to authorities
5410 - Directory authorities ignore router descriptors that have only
5411 cosmetic differences: do this for 0.1.0.x servers now too.
5412 - Add a new flag to network-status indicating whether the server
5413 can answer v2 directory requests too.
5414 - Authdirs now stop whining so loudly about bad descriptors that
5415 they fetch from other dirservers. So when there's a log complaint,
5416 it's for sure from a freshly uploaded descriptor.
5417 - Reduce memory requirements in our structs by changing the order
5419 - There used to be two ways to specify your listening ports in a
5420 server descriptor: on the "router" line and with a separate "ports"
5421 line. Remove support for the "ports" line.
5422 - New config option "AuthDirRejectUnlisted" for auth dirservers as
5423 a panic button: if we get flooded with unusable servers we can
5424 revert to only listing servers in the approved-routers file.
5425 - Auth dir servers can now mark a fingerprint as "!reject" or
5426 "!invalid" in the approved-routers file (as its nickname), to
5427 refuse descriptors outright or include them but marked as invalid.
5428 - Servers store bandwidth history across restarts/crashes.
5429 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
5430 get a better idea of why their circuits failed. Not used yet.
5431 - Directory mirrors now cache up to 16 unrecognized network-status
5432 docs. Now we can add new authdirservers and they'll be cached too.
5433 - When picking a random directory, prefer non-authorities if any
5435 - New controller option "getinfo desc/all-recent" to fetch the
5436 latest server descriptor for every router that Tor knows about.
5439 Changes in version 0.1.0.16 - 2006-01-02
5440 o Crash bugfixes on 0.1.0.x:
5441 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5442 corrupting the heap, losing FDs, or crashing when we need to resize
5443 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5444 - It turns out sparc64 platforms crash on unaligned memory access
5445 too -- so detect and avoid this.
5446 - Handle truncated compressed data correctly (by detecting it and
5448 - Fix possible-but-unlikely free(NULL) in control.c.
5449 - When we were closing connections, there was a rare case that
5450 stomped on memory, triggering seg faults and asserts.
5451 - Avoid potential infinite recursion when building a descriptor. (We
5452 don't know that it ever happened, but better to fix it anyway.)
5453 - We were neglecting to unlink marked circuits from soon-to-close OR
5454 connections, which caused some rare scribbling on freed memory.
5455 - Fix a memory stomping race bug when closing the joining point of two
5456 rendezvous circuits.
5457 - Fix an assert in time parsing found by Steven Murdoch.
5459 o Other bugfixes on 0.1.0.x:
5460 - When we're doing reachability testing, provide more useful log
5461 messages so the operator knows what to expect.
5462 - Do not check whether DirPort is reachable when we are suppressing
5463 advertising it because of hibernation.
5464 - When building with -static or on Solaris, we sometimes needed -ldl.
5465 - When we're deciding whether a stream has enough circuits around
5466 that can handle it, count the freshly dirty ones and not the ones
5467 that are so dirty they won't be able to handle it.
5468 - When we're expiring old circuits, we had a logic error that caused
5469 us to close new rendezvous circuits rather than old ones.
5470 - Give a more helpful log message when you try to change ORPort via
5471 the controller: you should upgrade Tor if you want that to work.
5472 - We were failing to parse Tor versions that start with "Tor ".
5473 - Tolerate faulty streams better: when a stream fails for reason
5474 exitpolicy, stop assuming that the router is lying about his exit
5475 policy. When a stream fails for reason misc, allow it to retry just
5476 as if it was resolvefailed. When a stream has failed three times,
5477 reset its failure count so we can try again and get all three tries.
5480 Changes in version 0.1.1.10-alpha - 2005-12-11
5481 o Correctness bugfixes on 0.1.0.x:
5482 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5483 corrupting the heap, losing FDs, or crashing when we need to resize
5484 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5485 - Stop doing the complex voodoo overkill checking for insecure
5486 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
5487 - When we were closing connections, there was a rare case that
5488 stomped on memory, triggering seg faults and asserts.
5489 - We were neglecting to unlink marked circuits from soon-to-close OR
5490 connections, which caused some rare scribbling on freed memory.
5491 - When we're deciding whether a stream has enough circuits around
5492 that can handle it, count the freshly dirty ones and not the ones
5493 that are so dirty they won't be able to handle it.
5494 - Recover better from TCP connections to Tor servers that are
5495 broken but don't tell you (it happens!); and rotate TLS
5496 connections once a week.
5497 - When we're expiring old circuits, we had a logic error that caused
5498 us to close new rendezvous circuits rather than old ones.
5499 - Fix a scary-looking but apparently harmless bug where circuits
5500 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
5501 servers, and never switch to state CIRCUIT_STATE_OPEN.
5502 - When building with -static or on Solaris, we sometimes needed to
5504 - Give a useful message when people run Tor as the wrong user,
5505 rather than telling them to start chowning random directories.
5506 - We were failing to inform the controller about new .onion streams.
5508 o Security bugfixes on 0.1.0.x:
5509 - Refuse server descriptors if the fingerprint line doesn't match
5510 the included identity key. Tor doesn't care, but other apps (and
5511 humans) might actually be trusting the fingerprint line.
5512 - We used to kill the circuit when we receive a relay command we
5513 don't recognize. Now we just drop it.
5514 - Start obeying our firewall options more rigorously:
5515 . If we can't get to a dirserver directly, try going via Tor.
5516 . Don't ever try to connect (as a client) to a place our
5517 firewall options forbid.
5518 . If we specify a proxy and also firewall options, obey the
5519 firewall options even when we're using the proxy: some proxies
5520 can only proxy to certain destinations.
5521 - Fix a bug found by Lasse Overlier: when we were making internal
5522 circuits (intended to be cannibalized later for rendezvous and
5523 introduction circuits), we were picking them so that they had
5524 useful exit nodes. There was no need for this, and it actually
5525 aids some statistical attacks.
5526 - Start treating internal circuits and exit circuits separately.
5527 It's important to keep them separate because internal circuits
5528 have their last hops picked like middle hops, rather than like
5529 exit hops. So exiting on them will break the user's expectations.
5531 o Bugfixes on 0.1.1.x:
5532 - Take out the mis-feature where we tried to detect IP address
5533 flapping for people with DynDNS, and chose not to upload a new
5534 server descriptor sometimes.
5535 - Try to be compatible with OpenSSL 0.9.6 again.
5536 - Log fix: when the controller is logging about .onion addresses,
5537 sometimes it didn't include the ".onion" part of the address.
5538 - Don't try to modify options->DirServers internally -- if the
5539 user didn't specify any, just add the default ones directly to
5540 the trusted dirserver list. This fixes a bug where people running
5541 controllers would use SETCONF on some totally unrelated config
5542 option, and Tor would start yelling at them about changing their
5544 - Let the controller's redirectstream command specify a port, in
5545 case the controller wants to change that too.
5546 - When we requested a pile of server descriptors, we sometimes
5547 accidentally launched a duplicate request for the first one.
5548 - Bugfix for trackhostexits: write down the fingerprint of the
5549 chosen exit, not its nickname, because the chosen exit might not
5551 - When parsing foo.exit, if foo is unknown, and we are leaving
5552 circuits unattached, set the chosen_exit field and leave the
5553 address empty. This matters because controllers got confused
5555 - Directory authorities no longer try to download server
5556 descriptors that they know they will reject.
5558 o Features and updates:
5559 - Replace balanced trees with hash tables: this should make stuff
5560 significantly faster.
5561 - Resume using the AES counter-mode implementation that we ship,
5562 rather than OpenSSL's. Ours is significantly faster.
5563 - Many other CPU and memory improvements.
5564 - Add a new config option FastFirstHopPK (on by default) so clients
5565 do a trivial crypto handshake for their first hop, since TLS has
5566 already taken care of confidentiality and authentication.
5567 - Add a new config option TestSocks so people can see if their
5568 applications are using socks4, socks4a, socks5-with-ip, or
5569 socks5-with-hostname. This way they don't have to keep mucking
5570 with tcpdump and wondering if something got cached somewhere.
5571 - Warn when listening on a public address for socks. I suspect a
5572 lot of people are setting themselves up as open socks proxies,
5573 and they have no idea that jerks on the Internet are using them,
5574 since they simply proxy the traffic into the Tor network.
5575 - Add "private:*" as an alias in configuration for policies. Now
5576 you can simplify your exit policy rather than needing to list
5577 every single internal or nonroutable network space.
5578 - Add a new controller event type that allows controllers to get
5579 all server descriptors that were uploaded to a router in its role
5580 as authoritative dirserver.
5581 - Start shipping socks-extensions.txt, tor-doc-unix.html,
5582 tor-doc-server.html, and stylesheet.css in the tarball.
5583 - Stop shipping tor-doc.html in the tarball.
5586 Changes in version 0.1.1.9-alpha - 2005-11-15
5587 o Usability improvements:
5588 - Start calling it FooListenAddress rather than FooBindAddress,
5589 since few of our users know what it means to bind an address
5591 - Reduce clutter in server logs. We're going to try to make
5592 them actually usable now. New config option ProtocolWarnings that
5593 lets you hear about how _other Tors_ are breaking the protocol. Off
5595 - Divide log messages into logging domains. Once we put some sort
5596 of interface on this, it will let people looking at more verbose
5597 log levels specify the topics they want to hear more about.
5598 - Make directory servers return better http 404 error messages
5599 instead of a generic "Servers unavailable".
5600 - Check for even more Windows version flags when writing the platform
5601 string in server descriptors, and note any we don't recognize.
5602 - Clean up more of the OpenSSL memory when exiting, so we can detect
5603 memory leaks better.
5604 - Make directory authorities be non-versioning, non-naming by
5605 default. Now we can add new directory servers without requiring
5606 their operators to pay close attention.
5607 - When logging via syslog, include the pid whenever we provide
5608 a log entry. Suggested by Todd Fries.
5610 o Performance improvements:
5611 - Directory servers now silently throw away new descriptors that
5612 haven't changed much if the timestamps are similar. We do this to
5613 tolerate older Tor servers that upload a new descriptor every 15
5614 minutes. (It seemed like a good idea at the time.)
5615 - Inline bottleneck smartlist functions; use fast versions by default.
5616 - Add a "Map from digest to void*" abstraction digestmap_t so we
5617 can do less hex encoding/decoding. Use it in router_get_by_digest()
5618 to resolve a performance bottleneck.
5619 - Allow tor_gzip_uncompress to extract as much as possible from
5620 truncated compressed data. Try to extract as many
5621 descriptors as possible from truncated http responses (when
5622 DIR_PURPOSE_FETCH_ROUTERDESC).
5623 - Make circ->onionskin a pointer, not a static array. moria2 was using
5624 125000 circuit_t's after it had been up for a few weeks, which
5625 translates to 20+ megs of wasted space.
5626 - The private half of our EDH handshake keys are now chosen out
5627 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
5629 o Security improvements:
5630 - Start making directory caches retain old routerinfos, so soon
5631 clients can start asking by digest of descriptor rather than by
5632 fingerprint of server.
5633 - Add half our entropy from RAND_poll in OpenSSL. This knows how
5634 to use egd (if present), openbsd weirdness (if present), vms/os2
5635 weirdness (if we ever port there), and more in the future.
5637 o Bugfixes on 0.1.0.x:
5638 - Do round-robin writes of at most 16 kB per write. This might be
5639 more fair on loaded Tor servers, and it might resolve our Windows
5640 crash bug. It might also slow things down.
5641 - Our TLS handshakes were generating a single public/private
5642 keypair for the TLS context, rather than making a new one for
5643 each new connections. Oops. (But we were still rotating them
5644 periodically, so it's not so bad.)
5645 - When we were cannibalizing a circuit with a particular exit
5646 node in mind, we weren't checking to see if that exit node was
5647 already present earlier in the circuit. Oops.
5648 - When a Tor server's IP changes (e.g. from a dyndns address),
5649 upload a new descriptor so clients will learn too.
5650 - Really busy servers were keeping enough circuits open on stable
5651 connections that they were wrapping around the circuit_id
5652 space. (It's only two bytes.) This exposed a bug where we would
5653 feel free to reuse a circuit_id even if it still exists but has
5654 been marked for close. Try to fix this bug. Some bug remains.
5655 - If we would close a stream early (e.g. it asks for a .exit that
5656 we know would refuse it) but the LeaveStreamsUnattached config
5657 option is set by the controller, then don't close it.
5659 o Bugfixes on 0.1.1.8-alpha:
5660 - Fix a big pile of memory leaks, some of them serious.
5661 - Do not try to download a routerdesc if we would immediately reject
5663 - Resume inserting a newline between all router descriptors when
5664 generating (old style) signed directories, since our spec says
5666 - When providing content-type application/octet-stream for
5667 server descriptors using .z, we were leaving out the
5668 content-encoding header. Oops. (Everything tolerated this just
5669 fine, but that doesn't mean we need to be part of the problem.)
5670 - Fix a potential seg fault in getconf and getinfo using version 1
5671 of the controller protocol.
5672 - Avoid crash: do not check whether DirPort is reachable when we
5673 are suppressing it because of hibernation.
5674 - Make --hash-password not crash on exit.
5677 Changes in version 0.1.1.8-alpha - 2005-10-07
5678 o New features (major):
5679 - Clients don't download or use the directory anymore. Now they
5680 download and use network-statuses from the trusted dirservers,
5681 and fetch individual server descriptors as needed from mirrors.
5682 See dir-spec.txt for all the gory details.
5683 - Be more conservative about whether to advertise our DirPort.
5684 The main change is to not advertise if we're running at capacity
5685 and either a) we could hibernate or b) our capacity is low and
5686 we're using a default DirPort.
5687 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
5689 o New features (minor):
5690 - Try to be smart about when to retry network-status and
5691 server-descriptor fetches. Still needs some tuning.
5692 - Stop parsing, storing, or using running-routers output (but
5693 mirrors still cache and serve it).
5694 - Consider a threshold of versioning dirservers (dirservers who have
5695 an opinion about which Tor versions are still recommended) before
5696 deciding whether to warn the user that he's obsolete.
5697 - Dirservers can now reject/invalidate by key and IP, with the
5698 config options "AuthDirInvalid" and "AuthDirReject". This is
5699 useful since currently we automatically list servers as running
5700 and usable even if we know they're jerks.
5701 - Provide dire warnings to any users who set DirServer; move it out
5702 of torrc.sample and into torrc.complete.
5703 - Add MyFamily to torrc.sample in the server section.
5704 - Add nicknames to the DirServer line, so we can refer to them
5705 without requiring all our users to memorize their IP addresses.
5706 - When we get an EOF or a timeout on a directory connection, note
5707 how many bytes of serverdesc we are dropping. This will help
5708 us determine whether it is smart to parse incomplete serverdesc
5710 - Add a new function to "change pseudonyms" -- that is, to stop
5711 using any currently-dirty circuits for new streams, so we don't
5712 link new actions to old actions. Currently it's only called on
5713 HUP (or SIGNAL RELOAD).
5714 - On sighup, if UseHelperNodes changed to 1, use new circuits.
5715 - Start using RAND_bytes rather than RAND_pseudo_bytes from
5716 OpenSSL. Also, reseed our entropy every hour, not just at
5717 startup. And entropy in 512-bit chunks, not 160-bit chunks.
5719 o Fixes on 0.1.1.7-alpha:
5720 - Nobody ever implemented EVENT_ADDRMAP for control protocol
5721 version 0, so don't let version 0 controllers ask for it.
5722 - If you requested something with too many newlines via the
5723 v1 controller protocol, you could crash tor.
5724 - Fix a number of memory leaks, including some pretty serious ones.
5725 - Re-enable DirPort testing again, so Tor servers will be willing
5726 to advertise their DirPort if it's reachable.
5727 - On TLS handshake, only check the other router's nickname against
5728 its expected nickname if is_named is set.
5730 o Fixes forward-ported from 0.1.0.15:
5731 - Don't crash when we don't have any spare file descriptors and we
5732 try to spawn a dns or cpu worker.
5733 - Make the numbers in read-history and write-history into uint64s,
5734 so they don't overflow and publish negatives in the descriptor.
5737 - For the OS X package's modified privoxy config file, comment
5738 out the "logfile" line so we don't log everything passed
5740 - We were whining about using socks4 or socks5-with-local-lookup
5741 even when it's an IP in the "virtual" range we designed exactly
5743 - We were leaking some memory every time the client changes IPs.
5744 - Never call free() on tor_malloc()d memory. This will help us
5745 use dmalloc to detect memory leaks.
5746 - Check for named servers when looking them up by nickname;
5747 warn when we'recalling a non-named server by its nickname;
5748 don't warn twice about the same name.
5749 - Try to list MyFamily elements by key, not by nickname, and warn
5750 if we've not heard of the server.
5751 - Make windows platform detection (uname equivalent) smarter.
5752 - It turns out sparc64 doesn't like unaligned access either.
5755 Changes in version 0.1.0.15 - 2005-09-23
5756 o Bugfixes on 0.1.0.x:
5757 - Reject ports 465 and 587 (spam targets) in default exit policy.
5758 - Don't crash when we don't have any spare file descriptors and we
5759 try to spawn a dns or cpu worker.
5760 - Get rid of IgnoreVersion undocumented config option, and make us
5761 only warn, never exit, when we're running an obsolete version.
5762 - Don't try to print a null string when your server finds itself to
5763 be unreachable and the Address config option is empty.
5764 - Make the numbers in read-history and write-history into uint64s,
5765 so they don't overflow and publish negatives in the descriptor.
5766 - Fix a minor memory leak in smartlist_string_remove().
5767 - We were only allowing ourselves to upload a server descriptor at
5768 most every 20 minutes, even if it changed earlier than that.
5769 - Clean up log entries that pointed to old URLs.
5772 Changes in version 0.1.1.7-alpha - 2005-09-14
5773 o Fixes on 0.1.1.6-alpha:
5774 - Exit servers were crashing when people asked them to make a
5775 connection to an address not in their exit policy.
5776 - Looking up a non-existent stream for a v1 control connection would
5778 - Fix a seg fault if we ask a dirserver for a descriptor by
5779 fingerprint but he doesn't know about him.
5780 - SETCONF was appending items to linelists, not clearing them.
5781 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
5782 out and refuse the setconf if it would fail.
5783 - Downgrade the dirserver log messages when whining about
5787 - Add Peter Palfrader's check-tor script to tor/contrib/
5788 It lets you easily check whether a given server (referenced by
5789 nickname) is reachable by you.
5790 - Numerous changes to move towards client-side v2 directories. Not
5794 - If the user gave tor an odd number of command-line arguments,
5795 we were silently ignoring the last one. Now we complain and fail.
5796 [This wins the oldest-bug prize -- this bug has been present since
5797 November 2002, as released in Tor 0.0.0.]
5798 - Do not use unaligned memory access on alpha, mips, or mipsel.
5799 It *works*, but is very slow, so we treat them as if it doesn't.
5800 - Retry directory requests if we fail to get an answer we like
5801 from a given dirserver (we were retrying before, but only if
5802 we fail to connect).
5803 - When writing the RecommendedVersions line, sort them first.
5804 - When the client asked for a rendezvous port that the hidden
5805 service didn't want to provide, we were sending an IP address
5806 back along with the end cell. Fortunately, it was zero. But stop
5808 - Correct "your server is reachable" log entries to indicate that
5809 it was self-testing that told us so.
5812 Changes in version 0.1.1.6-alpha - 2005-09-09
5813 o Fixes on 0.1.1.5-alpha:
5814 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
5815 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
5816 - Fix bug with tor_memmem finding a match at the end of the string.
5817 - Make unit tests run without segfaulting.
5818 - Resolve some solaris x86 compile warnings.
5819 - Handle duplicate lines in approved-routers files without warning.
5820 - Fix bug where as soon as a server refused any requests due to his
5821 exit policy (e.g. when we ask for localhost and he tells us that's
5822 127.0.0.1 and he won't do it), we decided he wasn't obeying his
5823 exit policy using him for any exits.
5824 - Only do openssl hardware accelerator stuff if openssl version is
5827 o New controller features/fixes:
5828 - Add a "RESETCONF" command so you can set config options like
5829 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
5830 a config option in the torrc with no value, then it clears it
5831 entirely (rather than setting it to its default).
5832 - Add a "GETINFO config-file" to tell us where torrc is.
5833 - Avoid sending blank lines when GETINFO replies should be empty.
5834 - Add a QUIT command for the controller (for using it manually).
5835 - Fix a bug in SAVECONF that was adding default dirservers and
5836 other redundant entries to the torrc file.
5838 o Start on the new directory design:
5839 - Generate, publish, cache, serve new network-status format.
5840 - Publish individual descriptors (by fingerprint, by "all", and by
5842 - Publish client and server recommended versions separately.
5843 - Allow tor_gzip_uncompress() to handle multiple concatenated
5844 compressed strings. Serve compressed groups of router
5845 descriptors. The compression logic here could be more
5847 - Distinguish v1 authorities (all currently trusted directories)
5848 from v2 authorities (all trusted directories).
5849 - Change DirServers config line to note which dirs are v1 authorities.
5850 - Add configuration option "V1AuthoritativeDirectory 1" which
5851 moria1, moria2, and tor26 should set.
5852 - Remove option when getting directory cache to see whether they
5853 support running-routers; they all do now. Replace it with one
5854 to see whether caches support v2 stuff.
5857 - Dirservers now do their own external reachability testing of each
5858 Tor server, and only list them as running if they've been found to
5859 be reachable. We also send back warnings to the server's logs if
5860 it uploads a descriptor that we already believe is unreachable.
5861 - Implement exit enclaves: if we know an IP address for the
5862 destination, and there's a running Tor server at that address
5863 which allows exit to the destination, then extend the circuit to
5864 that exit first. This provides end-to-end encryption and end-to-end
5865 authentication. Also, if the user wants a .exit address or enclave,
5866 use 4 hops rather than 3, and cannibalize a general circ for it
5868 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
5869 controller. Also, rotate dns and cpu workers if the controller
5870 changes options that will affect them; and initialize the dns
5871 worker cache tree whether or not we start out as a server.
5872 - Only upload a new server descriptor when options change, 18
5873 hours have passed, uptime is reset, or bandwidth changes a lot.
5874 - Check [X-]Forwarded-For headers in HTTP requests when generating
5875 log messages. This lets people run dirservers (and caches) behind
5876 Apache but still know which IP addresses are causing warnings.
5878 o Config option changes:
5879 - Replace (Fascist)Firewall* config options with a new
5880 ReachableAddresses option that understands address policies.
5881 For example, "ReachableAddresses *:80,*:443"
5882 - Get rid of IgnoreVersion undocumented config option, and make us
5883 only warn, never exit, when we're running an obsolete version.
5884 - Make MonthlyAccountingStart config option truly obsolete now.
5887 - Reject ports 465 and 587 in the default exit policy, since
5888 people have started using them for spam too.
5889 - It turns out we couldn't bootstrap a network since we added
5890 reachability detection in 0.1.0.1-rc. Good thing the Tor network
5891 has never gone down. Add an AssumeReachable config option to let
5892 servers and dirservers bootstrap. When we're trying to build a
5893 high-uptime or high-bandwidth circuit but there aren't enough
5894 suitable servers, try being less picky rather than simply failing.
5895 - Our logic to decide if the OR we connected to was the right guy
5896 was brittle and maybe open to a mitm for unverified routers.
5897 - We weren't cannibalizing circuits correctly for
5898 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
5899 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
5900 build those from scratch. This should make hidden services faster.
5901 - Predict required circuits better, with an eye toward making hidden
5902 services faster on the service end.
5903 - Retry streams if the exit node sends back a 'misc' failure. This
5904 should result in fewer random failures. Also, after failing
5905 from resolve failed or misc, reset the num failures, so we give
5906 it a fair shake next time we try.
5907 - Clean up the rendezvous warn log msgs, and downgrade some to info.
5908 - Reduce severity on logs about dns worker spawning and culling.
5909 - When we're shutting down and we do something like try to post a
5910 server descriptor or rendezvous descriptor, don't complain that
5911 we seem to be unreachable. Of course we are, we're shutting down.
5912 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
5913 We don't use them yet, but maybe one day our DNS resolver will be
5914 able to discover them.
5915 - Make ContactInfo mandatory for authoritative directory servers.
5916 - Require server descriptors to list IPv4 addresses -- hostnames
5917 are no longer allowed. This also fixes some potential security
5918 problems with people providing hostnames as their address and then
5919 preferentially resolving them to partition users.
5920 - Change log line for unreachability to explicitly suggest /etc/hosts
5921 as the culprit. Also make it clearer what IP address and ports we're
5922 testing for reachability.
5923 - Put quotes around user-supplied strings when logging so users are
5924 more likely to realize if they add bad characters (like quotes)
5926 - Let auth dir servers start without specifying an Address config
5928 - Make unit tests (and other invocations that aren't the real Tor)
5929 run without launching listeners, creating subdirectories, and so on.
5932 Changes in version 0.1.1.5-alpha - 2005-08-08
5933 o Bugfixes included in 0.1.0.14.
5935 o Bugfixes on 0.1.0.x:
5936 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
5937 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
5938 it would silently using ignore the 6668.
5941 Changes in version 0.1.0.14 - 2005-08-08
5942 o Bugfixes on 0.1.0.x:
5943 - Fix the other half of the bug with crypto handshakes
5945 - Fix an assert trigger if you send a 'signal term' via the
5946 controller when it's listening for 'event info' messages.
5949 Changes in version 0.1.1.4-alpha - 2005-08-04
5950 o Bugfixes included in 0.1.0.13.
5953 - Improve tor_gettimeofday() granularity on windows.
5954 - Make clients regenerate their keys when their IP address changes.
5955 - Implement some more GETINFO goodness: expose helper nodes, config
5956 options, getinfo keys.
5959 Changes in version 0.1.0.13 - 2005-08-04
5960 o Bugfixes on 0.1.0.x:
5961 - Fix a critical bug in the security of our crypto handshakes.
5962 - Fix a size_t underflow in smartlist_join_strings2() that made
5963 it do bad things when you hand it an empty smartlist.
5964 - Fix Windows installer to ship Tor license (thanks to Aphex for
5965 pointing out this oversight) and put a link to the doc directory
5967 - Explicitly set no-unaligned-access for sparc: it turns out the
5968 new gcc's let you compile broken code, but that doesn't make it
5972 Changes in version 0.1.1.3-alpha - 2005-07-23
5973 o Bugfixes on 0.1.1.2-alpha:
5974 - Fix a bug in handling the controller's "post descriptor"
5976 - Fix several bugs in handling the controller's "extend circuit"
5978 - Fix a bug in handling the controller's "stream status" event.
5979 - Fix an assert failure if we have a controller listening for
5980 circuit events and we go offline.
5981 - Re-allow hidden service descriptors to publish 0 intro points.
5982 - Fix a crash when generating your hidden service descriptor if
5983 you don't have enough intro points already.
5985 o New features on 0.1.1.2-alpha:
5986 - New controller function "getinfo accounting", to ask how
5987 many bytes we've used in this time period.
5988 - Experimental support for helper nodes: a lot of the risk from
5989 a small static adversary comes because users pick new random
5990 nodes every time they rebuild a circuit. Now users will try to
5991 stick to the same small set of entry nodes if they can. Not
5992 enabled by default yet.
5994 o Bugfixes on 0.1.0.12:
5995 - If you're an auth dir server, always publish your dirport,
5996 even if you haven't yet found yourself to be reachable.
5997 - Fix a size_t underflow in smartlist_join_strings2() that made
5998 it do bad things when you hand it an empty smartlist.
6001 Changes in version 0.1.0.12 - 2005-07-18
6002 o New directory servers:
6003 - tor26 has changed IP address.
6005 o Bugfixes on 0.1.0.x:
6006 - Fix a possible double-free in tor_gzip_uncompress().
6007 - When --disable-threads is set, do not search for or link against
6009 - Don't trigger an assert if an authoritative directory server
6010 claims its dirport is 0.
6011 - Fix bug with removing Tor as an NT service: some people were
6012 getting "The service did not return an error." Thanks to Matt
6016 Changes in version 0.1.1.2-alpha - 2005-07-15
6017 o New directory servers:
6018 - tor26 has changed IP address.
6020 o Bugfixes on 0.1.0.x, crashes/leaks:
6021 - Port the servers-not-obeying-their-exit-policies fix from
6023 - Fix an fd leak in start_daemon().
6024 - On Windows, you can't always reopen a port right after you've
6025 closed it. So change retry_listeners() to only close and re-open
6026 ports that have changed.
6027 - Fix a possible double-free in tor_gzip_uncompress().
6029 o Bugfixes on 0.1.0.x, usability:
6030 - When tor_socketpair() fails in Windows, give a reasonable
6031 Windows-style errno back.
6032 - Let people type "tor --install" as well as "tor -install" when
6034 want to make it an NT service.
6035 - NT service patch from Matt Edman to improve error messages.
6036 - When the controller asks for a config option with an abbreviated
6037 name, give the full name in our response.
6038 - Correct the man page entry on TrackHostExitsExpire.
6039 - Looks like we were never delivering deflated (i.e. compressed)
6040 running-routers lists, even when asked. Oops.
6041 - When --disable-threads is set, do not search for or link against
6044 o Bugfixes on 0.1.1.x:
6045 - Fix a seg fault with autodetecting which controller version is
6049 - New hidden service descriptor format: put a version in it, and
6050 let people specify introduction/rendezvous points that aren't
6051 in "the directory" (which is subjective anyway).
6052 - Allow the DEBUG controller event to work again. Mark certain log
6053 entries as "don't tell this to controllers", so we avoid cycles.
6056 Changes in version 0.1.0.11 - 2005-06-30
6057 o Bugfixes on 0.1.0.x:
6058 - Fix major security bug: servers were disregarding their
6059 exit policies if clients behaved unexpectedly.
6060 - Make OS X init script check for missing argument, so we don't
6061 confuse users who invoke it incorrectly.
6062 - Fix a seg fault in "tor --hash-password foo".
6063 - The MAPADDRESS control command was broken.
6066 Changes in version 0.1.1.1-alpha - 2005-06-29
6068 - Make OS X init script check for missing argument, so we don't
6069 confuse users who invoke it incorrectly.
6070 - Fix a seg fault in "tor --hash-password foo".
6071 - Fix a possible way to DoS dirservers.
6072 - When we complain that your exit policy implicitly allows local or
6073 private address spaces, name them explicitly so operators can
6075 - Make the log message less scary when all the dirservers are
6076 temporarily unreachable.
6077 - We were printing the number of idle dns workers incorrectly when
6081 - Revised controller protocol (version 1) that uses ascii rather
6082 than binary. Add supporting libraries in python and java so you
6083 can use the controller from your applications without caring how
6085 - Spiffy new support for crypto hardware accelerators. Can somebody
6089 Changes in version 0.0.9.10 - 2005-06-16
6090 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
6091 - Refuse relay cells that claim to have a length larger than the
6092 maximum allowed. This prevents a potential attack that could read
6093 arbitrary memory (e.g. keys) from an exit server's process
6097 Changes in version 0.1.0.10 - 2005-06-14
6098 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
6099 libevent before 1.1a.
6102 Changes in version 0.1.0.9-rc - 2005-06-09
6104 - Reset buf->highwater every time buf_shrink() is called, not just on
6105 a successful shrink. This was causing significant memory bloat.
6106 - Fix buffer overflow when checking hashed passwords.
6107 - Security fix: if seeding the RNG on Win32 fails, quit.
6108 - Allow seeding the RNG on Win32 even when you're not running as
6110 - Disable threading on Solaris too. Something is wonky with it,
6111 cpuworkers, and reentrant libs.
6112 - Reenable the part of the code that tries to flush as soon as an
6113 OR outbuf has a full TLS record available. Perhaps this will make
6114 OR outbufs not grow as huge except in rare cases, thus saving lots
6115 of CPU time plus memory.
6116 - Reject malformed .onion addresses rather then passing them on as
6117 normal web requests.
6118 - Adapt patch from Adam Langley: fix possible memory leak in
6119 tor_lookup_hostname().
6120 - Initialize libevent later in the startup process, so the logs are
6121 already established by the time we start logging libevent warns.
6122 - Use correct errno on win32 if libevent fails.
6123 - Check and warn about known-bad/slow libevent versions.
6124 - Pay more attention to the ClientOnly config option.
6125 - Have torctl.in/tor.sh.in check for location of su binary (needed
6127 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
6128 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
6129 HttpProxyAuthenticator
6130 - Stop warning about sigpipes in the logs. We're going to
6131 pretend that getting these occassionally is normal and fine.
6132 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
6134 installer screens; and don't put stuff into StartupItems unless
6135 the user asks you to.
6136 - Require servers that use the default dirservers to have public IP
6137 addresses. We have too many servers that are configured with private
6138 IPs and their admins never notice the log entries complaining that
6139 their descriptors are being rejected.
6140 - Add OSX uninstall instructions. An actual uninstall script will
6144 Changes in version 0.1.0.8-rc - 2005-05-23
6146 - It turns out that kqueue on OS X 10.3.9 was causing kernel
6147 panics. Disable kqueue on all OS X Tors.
6148 - Fix RPM: remove duplicate line accidentally added to the rpm
6150 - Disable threads on openbsd too, since its gethostaddr is not
6152 - Tolerate libevent 0.8 since it still works, even though it's
6154 - Enable building on Red Hat 9.0 again.
6155 - Allow the middle hop of the testing circuit to be running any
6156 version, now that most of them have the bugfix to let them connect
6157 to unknown servers. This will allow reachability testing to work
6158 even when 0.0.9.7-0.0.9.9 become obsolete.
6159 - Handle relay cells with rh.length too large. This prevents
6160 a potential attack that could read arbitrary memory (maybe even
6161 keys) from the exit server's process.
6162 - We screwed up the dirport reachability testing when we don't yet
6163 have a cached version of the directory. Hopefully now fixed.
6164 - Clean up router_load_single_router() (used by the controller),
6165 so it doesn't seg fault on error.
6166 - Fix a minor memory leak when somebody establishes an introduction
6167 point at your Tor server.
6168 - If a socks connection ends because read fails, don't warn that
6169 you're not sending a socks reply back.
6172 - Add HttpProxyAuthenticator config option too, that works like
6173 the HttpsProxyAuthenticator config option.
6174 - Encode hashed controller passwords in hex instead of base64,
6175 to make it easier to write controllers.
6178 Changes in version 0.1.0.7-rc - 2005-05-17
6180 - Fix a bug in the OS X package installer that prevented it from
6181 installing on Tiger.
6182 - Fix a script bug in the OS X package installer that made it
6183 complain during installation.
6184 - Find libevent even if it's hiding in /usr/local/ and your
6185 CFLAGS and LDFLAGS don't tell you to look there.
6186 - Be able to link with libevent as a shared library (the default
6187 after 1.0d), even if it's hiding in /usr/local/lib and even
6188 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
6189 assuming you're running gcc. Otherwise fail and give a useful
6191 - Fix a bug in the RPM packager: set home directory for _tor to
6192 something more reasonable when first installing.
6193 - Free a minor amount of memory that is still reachable on exit.
6196 Changes in version 0.1.0.6-rc - 2005-05-14
6198 - Implement --disable-threads configure option. Disable threads on
6199 netbsd by default, because it appears to have no reentrant resolver
6201 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
6202 release (1.1) detects and disables kqueue if it's broken.
6203 - Append default exit policy before checking for implicit internal
6204 addresses. Now we don't log a bunch of complaints on startup
6205 when using the default exit policy.
6206 - Some people were putting "Address " in their torrc, and they had
6207 a buggy resolver that resolved " " to 0.0.0.0. Oops.
6208 - If DataDir is ~/.tor, and that expands to /.tor, then default to
6209 LOCALSTATEDIR/tor instead.
6210 - Fix fragmented-message bug in TorControl.py.
6211 - Resolve a minor bug which would prevent unreachable dirports
6212 from getting suppressed in the published descriptor.
6213 - When the controller gave us a new descriptor, we weren't resolving
6214 it immediately, so Tor would think its address was 0.0.0.0 until
6215 we fetched a new directory.
6216 - Fix an uppercase/lowercase case error in suppressing a bogus
6217 libevent warning on some Linuxes.
6220 - Begin scrubbing sensitive strings from logs by default. Turn off
6221 the config option SafeLogging if you need to do debugging.
6222 - Switch to a new buffer management algorithm, which tries to avoid
6223 reallocing and copying quite as much. In first tests it looks like
6224 it uses *more* memory on average, but less cpu.
6225 - First cut at support for "create-fast" cells. Clients can use
6226 these when extending to their first hop, since the TLS already
6227 provides forward secrecy and authentication. Not enabled on
6229 - When dirservers refuse a router descriptor, we now log its
6230 contactinfo, platform, and the poster's IP address.
6231 - Call tor_free_all instead of connections_free_all after forking, to
6232 save memory on systems that need to fork.
6233 - Whine at you if you're a server and you don't set your contactinfo.
6234 - Implement --verify-config command-line option to check if your torrc
6235 is valid without actually launching Tor.
6236 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
6237 rather than just rejecting it.
6240 Changes in version 0.1.0.5-rc - 2005-04-27
6242 - Stop trying to print a null pointer if an OR conn fails because
6243 we didn't like its cert.
6245 - Switch our internal buffers implementation to use a ring buffer,
6246 to hopefully improve performance for fast servers a lot.
6247 - Add HttpsProxyAuthenticator support (basic auth only), based
6248 on patch from Adam Langley.
6249 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
6250 the fast servers that have been joining lately.
6251 - Give hidden service accesses extra time on the first attempt,
6252 since 60 seconds is often only barely enough. This might improve
6254 - Improve performance for dirservers: stop re-parsing the whole
6255 directory every time you regenerate it.
6256 - Add more debugging info to help us find the weird dns freebsd
6257 pthreads bug; cleaner debug messages to help track future issues.
6260 Changes in version 0.0.9.9 - 2005-04-23
6261 o Bugfixes on 0.0.9.x:
6262 - If unofficial Tor clients connect and send weird TLS certs, our
6263 Tor server triggers an assert. This release contains a minimal
6264 backport from the broader fix that we put into 0.1.0.4-rc.
6267 Changes in version 0.1.0.4-rc - 2005-04-23
6269 - If unofficial Tor clients connect and send weird TLS certs, our
6270 Tor server triggers an assert. Stop asserting, and start handling
6271 TLS errors better in other situations too.
6272 - When the controller asks us to tell it about all the debug-level
6273 logs, it turns out we were generating debug-level logs while
6274 telling it about them, which turns into a bad loop. Now keep
6275 track of whether you're sending a debug log to the controller,
6276 and don't log when you are.
6277 - Fix the "postdescriptor" feature of the controller interface: on
6278 non-complete success, only say "done" once.
6280 - Clients are now willing to load balance over up to 2mB, not 1mB,
6281 of advertised bandwidth capacity.
6282 - Add a NoPublish config option, so you can be a server (e.g. for
6283 testing running Tor servers in other Tor networks) without
6284 publishing your descriptor to the primary dirservers.
6287 Changes in version 0.1.0.3-rc - 2005-04-08
6288 o Improvements on 0.1.0.2-rc:
6289 - Client now retries when streams end early for 'hibernating' or
6290 'resource limit' reasons, rather than failing them.
6291 - More automated handling for dirserver operators:
6292 - Automatically approve nodes running 0.1.0.2-rc or later,
6293 now that the the reachability detection stuff is working.
6294 - Now we allow two unverified servers with the same nickname
6295 but different keys. But if a nickname is verified, only that
6296 nickname+key are allowed.
6297 - If you're an authdirserver connecting to an address:port,
6298 and it's not the OR you were expecting, forget about that
6299 descriptor. If he *was* the one you were expecting, then forget
6300 about all other descriptors for that address:port.
6301 - Allow servers to publish descriptors from 12 hours in the future.
6302 Corollary: only whine about clock skew from the dirserver if
6303 he's a trusted dirserver (since now even verified servers could
6304 have quite wrong clocks).
6305 - Adjust maximum skew and age for rendezvous descriptors: let skew
6306 be 48 hours rather than 90 minutes.
6307 - Efficiency improvements:
6308 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
6309 it much faster to look up a circuit for each relay cell.
6310 - Remove most calls to assert_all_pending_dns_resolves_ok(),
6311 since they're eating our cpu on exit nodes.
6312 - Stop wasting time doing a case insensitive comparison for every
6313 dns name every time we do any lookup. Canonicalize the names to
6314 lowercase and be done with it.
6315 - Start sending 'truncated' cells back rather than destroy cells,
6316 if the circuit closes in front of you. This means we won't have
6317 to abandon partially built circuits.
6318 - Only warn once per nickname from add_nickname_list_to_smartlist
6319 per failure, so an entrynode or exitnode choice that's down won't
6321 - Put a note in the torrc about abuse potential with the default
6323 - Revise control spec and implementation to allow all log messages to
6324 be sent to controller with their severities intact (suggested by
6325 Matt Edman). Update TorControl to handle new log event types.
6326 - Provide better explanation messages when controller's POSTDESCRIPTOR
6328 - Stop putting nodename in the Platform string in server descriptors.
6329 It doesn't actually help, and it is confusing/upsetting some people.
6331 o Bugfixes on 0.1.0.2-rc:
6332 - We were printing the host mask wrong in exit policies in server
6333 descriptors. This isn't a critical bug though, since we were still
6334 obeying the exit policy internally.
6335 - Fix Tor when compiled with libevent but without pthreads: move
6336 connection_unregister() from _connection_free() to
6338 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
6339 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
6340 when we look through the connection array, we'll find any of the
6341 cpu/dnsworkers. This is no good.
6343 o Bugfixes on 0.0.9.8:
6344 - Fix possible bug on threading platforms (e.g. win32) which was
6345 leaking a file descriptor whenever a cpuworker or dnsworker died.
6346 - When using preferred entry or exit nodes, ignore whether the
6347 circuit wants uptime or capacity. They asked for the nodes, they
6349 - chdir() to your datadirectory at the *end* of the daemonize process,
6350 not the beginning. This was a problem because the first time you
6351 run tor, if your datadir isn't there, and you have runasdaemon set
6352 to 1, it will try to chdir to it before it tries to create it. Oops.
6353 - Handle changed router status correctly when dirserver reloads
6354 fingerprint file. We used to be dropping all unverified descriptors
6355 right then. The bug was hidden because we would immediately
6356 fetch a directory from another dirserver, which would include the
6357 descriptors we just dropped.
6358 - When we're connecting to an OR and he's got a different nickname/key
6359 than we were expecting, only complain loudly if we're an OP or a
6360 dirserver. Complaining loudly to the OR admins just confuses them.
6361 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
6362 artificially capped at 500kB.
6365 Changes in version 0.0.9.8 - 2005-04-07
6366 o Bugfixes on 0.0.9.x:
6367 - We have a bug that I haven't found yet. Sometimes, very rarely,
6368 cpuworkers get stuck in the 'busy' state, even though the cpuworker
6369 thinks of itself as idle. This meant that no new circuits ever got
6370 established. Here's a workaround to kill any cpuworker that's been
6371 busy for more than 100 seconds.
6374 Changes in version 0.1.0.2-rc - 2005-04-01
6375 o Bugfixes on 0.1.0.1-rc:
6376 - Fixes on reachability detection:
6377 - Don't check for reachability while hibernating.
6378 - If ORPort is reachable but DirPort isn't, still publish the
6379 descriptor, but zero out DirPort until it's found reachable.
6380 - When building testing circs for ORPort testing, use only
6381 high-bandwidth nodes, so fewer circuits fail.
6382 - Complain about unreachable ORPort separately from unreachable
6383 DirPort, so the user knows what's going on.
6384 - Make sure we only conclude ORPort reachability if we didn't
6385 initiate the conn. Otherwise we could falsely conclude that
6386 we're reachable just because we connected to the guy earlier
6387 and he used that same pipe to extend to us.
6388 - Authdirservers shouldn't do ORPort reachability detection,
6389 since they're in clique mode, so it will be rare to find a
6390 server not already connected to them.
6391 - When building testing circuits, always pick middle hops running
6392 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
6393 bug. (This is a kludge; it will go away when 0.0.9.x becomes
6395 - When we decide we're reachable, actually publish our descriptor
6397 - Fix bug in redirectstream in the controller.
6398 - Fix the state descriptor strings so logs don't claim edge streams
6399 are in a different state than they actually are.
6400 - Use recent libevent features when possible (this only really affects
6401 win32 and osx right now, because the new libevent with these
6402 features hasn't been released yet). Add code to suppress spurious
6404 - Prevent possible segfault in connection_close_unattached_ap().
6405 - Fix newlines on torrc in win32.
6406 - Improve error msgs when tor-resolve fails.
6408 o Improvements on 0.0.9.x:
6409 - New experimental script tor/contrib/ExerciseServer.py (needs more
6410 work) that uses the controller interface to build circuits and
6411 fetch pages over them. This will help us bootstrap servers that
6412 have lots of capacity but haven't noticed it yet.
6413 - New experimental script tor/contrib/PathDemo.py (needs more work)
6414 that uses the controller interface to let you choose whole paths
6416 "<hostname>.<path,separated by dots>.<length of path>.path"
6417 - When we've connected to an OR and handshaked but didn't like
6418 the result, we were closing the conn without sending destroy
6419 cells back for pending circuits. Now send those destroys.
6422 Changes in version 0.0.9.7 - 2005-04-01
6423 o Bugfixes on 0.0.9.x:
6424 - Fix another race crash bug (thanks to Glenn Fink for reporting).
6425 - Compare identity to identity, not to nickname, when extending to
6426 a router not already in the directory. This was preventing us from
6427 extending to unknown routers. Oops.
6428 - Make sure to create OS X Tor user in <500 range, so we aren't
6429 creating actual system users.
6430 - Note where connection-that-hasn't-sent-end was marked, and fix
6431 a few really loud instances of this harmless bug (it's fixed more
6435 Changes in version 0.1.0.1-rc - 2005-03-28
6437 - Add reachability testing. Your Tor server will automatically try
6438 to see if its ORPort and DirPort are reachable from the outside,
6439 and it won't upload its descriptor until it decides they are.
6440 - Handle unavailable hidden services better. Handle slow or busy
6441 hidden services better.
6442 - Add support for CONNECTing through https proxies, with "HttpsProxy"
6444 - New exit policy: accept most low-numbered ports, rather than
6445 rejecting most low-numbered ports.
6446 - More Tor controller support (still experimental). See
6447 http://tor.eff.org/doc/control-spec.txt for all the new features,
6448 including signals to emulate unix signals from any platform;
6449 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
6450 closestream; closecircuit; etc.
6451 - Make nt services work and start on startup on win32 (based on
6452 patch by Matt Edman).
6453 - Add a new AddressMap config directive to rewrite incoming socks
6454 addresses. This lets you, for example, declare an implicit
6455 required exit node for certain sites.
6456 - Add a new TrackHostExits config directive to trigger addressmaps
6457 for certain incoming socks addresses -- for sites that break when
6458 your exit keeps changing (based on patch by Mike Perry).
6459 - Redo the client-side dns cache so it's just an addressmap too.
6460 - Notice when our IP changes, and reset stats/uptime/reachability.
6461 - When an application is using socks5, give him the whole variety of
6462 potential socks5 responses (connect refused, host unreachable, etc),
6463 rather than just "success" or "failure".
6464 - A more sane version numbering system. See
6465 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
6466 - New contributed script "exitlist": a simple python script to
6467 parse directories and find Tor nodes that exit to listed
6469 - New contributed script "privoxy-tor-toggle" to toggle whether
6470 Privoxy uses Tor. Seems to be configured for Debian by default.
6471 - Report HTTP reasons to client when getting a response from directory
6472 servers -- so you can actually know what went wrong.
6473 - New config option MaxAdvertisedBandwidth which lets you advertise
6474 a low bandwidthrate (to not attract as many circuits) while still
6475 allowing a higher bandwidthrate in reality.
6477 o Robustness/stability fixes:
6478 - Make Tor use Niels Provos's libevent instead of its current
6479 poll-but-sometimes-select mess. This will let us use faster async
6480 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
6482 - pthread support now too. This was forced because when we forked,
6483 we ended up wasting a lot of duplicate ram over time. Also switch
6484 to foo_r versions of some library calls to allow reentry and
6486 - Better handling for heterogeneous / unreliable nodes:
6487 - Annotate circuits w/ whether they aim to contain high uptime nodes
6488 and/or high capacity nodes. When building circuits, choose
6490 - This means that every single node in an intro rend circuit,
6491 not just the last one, will have a minimum uptime.
6492 - New config option LongLivedPorts to indicate application streams
6493 that will want high uptime circuits.
6494 - Servers reset uptime when a dir fetch entirely fails. This
6495 hopefully reflects stability of the server's network connectivity.
6496 - If somebody starts his tor server in Jan 2004 and then fixes his
6497 clock, don't make his published uptime be a year.
6498 - Reset published uptime when you wake up from hibernation.
6499 - Introduce a notion of 'internal' circs, which are chosen without
6500 regard to the exit policy of the last hop. Intro and rendezvous
6501 circs must be internal circs, to avoid leaking information. Resolve
6502 and connect streams can use internal circs if they want.
6503 - New circuit pooling algorithm: make sure to have enough circs around
6504 to satisfy any predicted ports, and also make sure to have 2 internal
6505 circs around if we've required internal circs lately (and with high
6506 uptime if we've seen that lately too).
6507 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
6508 which describes how often we retry making new circuits if current
6509 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
6510 how long we're willing to make use of an already-dirty circuit.
6511 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
6512 circ as necessary, if there are any completed ones lying around
6513 when we try to launch one.
6514 - Make hidden services try to establish a rendezvous for 30 seconds,
6515 rather than for n (where n=3) attempts to build a circuit.
6516 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
6517 "ShutdownWaitLength".
6518 - Try to be more zealous about calling connection_edge_end when
6519 things go bad with edge conns in connection.c.
6520 - Revise tor-spec to add more/better stream end reasons.
6521 - Revise all calls to connection_edge_end to avoid sending "misc",
6522 and to take errno into account where possible.
6525 - Fix a race condition that can trigger an assert, when we have a
6526 pending create cell and an OR connection fails right then.
6527 - Fix several double-mark-for-close bugs, e.g. where we were finding
6528 a conn for a cell even if that conn is already marked for close.
6529 - Make sequence of log messages when starting on win32 with no config
6530 file more reasonable.
6531 - When choosing an exit node for a new non-internal circ, don't take
6532 into account whether it'll be useful for any pending x.onion
6533 addresses -- it won't.
6534 - Turn addr_policy_compare from a tristate to a quadstate; this should
6535 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
6536 for google.com" problem.
6537 - Make "platform" string in descriptor more accurate for Win32 servers,
6538 so it's not just "unknown platform".
6539 - Fix an edge case in parsing config options (thanks weasel).
6540 If they say "--" on the commandline, it's not an option.
6541 - Reject odd-looking addresses at the client (e.g. addresses that
6542 contain a colon), rather than having the server drop them because
6544 - tor-resolve requests were ignoring .exit if there was a working circuit
6545 they could use instead.
6546 - REUSEADDR on normal platforms means you can rebind to the port
6547 right after somebody else has let it go. But REUSEADDR on win32
6548 means to let you bind to the port _even when somebody else
6549 already has it bound_! So, don't do that on Win32.
6550 - Change version parsing logic: a version is "obsolete" if it is not
6551 recommended and (1) there is a newer recommended version in the
6552 same series, or (2) there are no recommended versions in the same
6553 series, but there are some recommended versions in a newer series.
6554 A version is "new" if it is newer than any recommended version in
6556 - Stop most cases of hanging up on a socks connection without sending
6560 - Require BandwidthRate to be at least 20kB/s for servers.
6561 - When a dirserver causes you to give a warn, mention which dirserver
6563 - New config option DirAllowPrivateAddresses for authdirservers.
6564 Now by default they refuse router descriptors that have non-IP or
6565 private-IP addresses.
6566 - Stop publishing socksport in the directory, since it's not
6567 actually meant to be public. For compatibility, publish a 0 there
6569 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
6570 smart" value, that is low for servers and high for clients.
6571 - If our clock jumps forward by 100 seconds or more, assume something
6572 has gone wrong with our network and abandon all not-yet-used circs.
6573 - Warn when exit policy implicitly allows local addresses.
6574 - If we get an incredibly skewed timestamp from a dirserver mirror
6575 that isn't a verified OR, don't warn -- it's probably him that's
6577 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
6578 cookies to disk and doesn't log each web request to disk. (Thanks
6579 to Brett Carrington for pointing this out.)
6580 - When a client asks us for a dir mirror and we don't have one,
6581 launch an attempt to get a fresh one.
6582 - If we're hibernating and we get a SIGINT, exit immediately.
6583 - Add --with-dmalloc ./configure option, to track memory leaks.
6584 - And try to free all memory on closing, so we can detect what
6586 - Cache local dns resolves correctly even when they're .exit
6588 - Give a better warning when some other server advertises an
6589 ORPort that is actually an apache running ssl.
6590 - Add "opt hibernating 1" to server descriptor to make it clearer
6591 whether the server is hibernating.
6594 Changes in version 0.0.9.6 - 2005-03-24
6595 o Bugfixes on 0.0.9.x (crashes and asserts):
6596 - Add new end stream reasons to maintainance branch. Fix bug where
6597 reason (8) could trigger an assert. Prevent bug from recurring.
6598 - Apparently win32 stat wants paths to not end with a slash.
6599 - Fix assert triggers in assert_cpath_layer_ok(), where we were
6600 blowing away the circuit that conn->cpath_layer points to, then
6601 checking to see if the circ is well-formed. Backport check to make
6602 sure we dont use the cpath on a closed connection.
6603 - Prevent circuit_resume_edge_reading_helper() from trying to package
6604 inbufs for marked-for-close streams.
6605 - Don't crash on hup if your options->address has become unresolvable.
6606 - Some systems (like OS X) sometimes accept() a connection and tell
6607 you the remote host is 0.0.0.0:0. If this happens, due to some
6608 other mis-features, we get confused; so refuse the conn for now.
6610 o Bugfixes on 0.0.9.x (other):
6611 - Fix harmless but scary "Unrecognized content encoding" warn message.
6612 - Add new stream error reason: TORPROTOCOL reason means "you are not
6613 speaking a version of Tor I understand; say bye-bye to your stream."
6614 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
6615 into the future, now that we are more tolerant of skew. This
6616 resolves a bug where a Tor server would refuse to cache a directory
6617 because all the directories it gets are too far in the future;
6618 yet the Tor server never logs any complaints about clock skew.
6619 - Mac packaging magic: make man pages useable, and do not overwrite
6620 existing torrc files.
6621 - Make OS X log happily to /var/log/tor/tor.log
6624 Changes in version 0.0.9.5 - 2005-02-22
6625 o Bugfixes on 0.0.9.x:
6626 - Fix an assert race at exit nodes when resolve requests fail.
6627 - Stop picking unverified dir mirrors--it only leads to misery.
6628 - Patch from Matt Edman to make NT services work better. Service
6629 support is still not compiled into the executable by default.
6630 - Patch from Dmitri Bely so the Tor service runs better under
6631 the win32 SYSTEM account.
6632 - Make tor-resolve actually work (?) on Win32.
6633 - Fix a sign bug when getrlimit claims to have 4+ billion
6634 file descriptors available.
6635 - Stop refusing to start when bandwidthburst == bandwidthrate.
6636 - When create cells have been on the onion queue more than five
6637 seconds, just send back a destroy and take them off the list.
6640 Changes in version 0.0.9.4 - 2005-02-03
6641 o Bugfixes on 0.0.9:
6642 - Fix an assert bug that took down most of our servers: when
6643 a server claims to have 1 GB of bandwidthburst, don't
6645 - Don't crash as badly if we have spawned the max allowed number
6646 of dnsworkers, or we're out of file descriptors.
6647 - Block more file-sharing ports in the default exit policy.
6648 - MaxConn is now automatically set to the hard limit of max
6649 file descriptors we're allowed (ulimit -n), minus a few for
6651 - Give a clearer message when servers need to raise their
6652 ulimit -n when they start running out of file descriptors.
6653 - SGI Compatibility patches from Jan Schaumann.
6654 - Tolerate a corrupt cached directory better.
6655 - When a dirserver hasn't approved your server, list which one.
6656 - Go into soft hibernation after 95% of the bandwidth is used,
6657 not 99%. This is especially important for daily hibernators who
6658 have a small accounting max. Hopefully it will result in fewer
6659 cut connections when the hard hibernation starts.
6660 - Load-balance better when using servers that claim more than
6661 800kB/s of capacity.
6662 - Make NT services work (experimental, only used if compiled in).
6665 Changes in version 0.0.9.3 - 2005-01-21
6666 o Bugfixes on 0.0.9:
6667 - Backport the cpu use fixes from main branch, so busy servers won't
6668 need as much processor time.
6669 - Work better when we go offline and then come back, or when we
6670 run Tor at boot before the network is up. We do this by
6671 optimistically trying to fetch a new directory whenever an
6672 application request comes in and we think we're offline -- the
6673 human is hopefully a good measure of when the network is back.
6674 - Backport some minimal hidserv bugfixes: keep rend circuits open as
6675 long as you keep using them; actually publish hidserv descriptors
6676 shortly after they change, rather than waiting 20-40 minutes.
6677 - Enable Mac startup script by default.
6678 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
6679 - When you update AllowUnverifiedNodes or FirewallPorts via the
6680 controller's setconf feature, we were always appending, never
6682 - When you update HiddenServiceDir via setconf, it was screwing up
6683 the order of reading the lines, making it fail.
6684 - Do not rewrite a cached directory back to the cache; otherwise we
6685 will think it is recent and not fetch a newer one on startup.
6686 - Workaround for webservers that lie about Content-Encoding: Tor
6687 now tries to autodetect compressed directories and compression
6688 itself. This lets us Proxypass dir fetches through apache.
6691 Changes in version 0.0.9.2 - 2005-01-04
6692 o Bugfixes on 0.0.9 (crashes and asserts):
6693 - Fix an assert on startup when the disk is full and you're logging
6695 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
6696 style address, then we'd crash.
6697 - Fix an assert trigger when the running-routers string we get from
6698 a dirserver is broken.
6699 - Make worker threads start and run on win32. Now win32 servers
6701 - Bandaid (not actually fix, but now it doesn't crash) an assert
6702 where the dns worker dies mysteriously and the main Tor process
6703 doesn't remember anything about the address it was resolving.
6705 o Bugfixes on 0.0.9 (Win32):
6706 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
6707 name out of the warning/assert messages.
6708 - Fix a superficial "unhandled error on read" bug on win32.
6709 - The win32 installer no longer requires a click-through for our
6710 license, since our Free Software license grants rights but does not
6712 - Win32: When connecting to a dirserver fails, try another one
6713 immediately. (This was already working for non-win32 Tors.)
6714 - Stop trying to parse $HOME on win32 when hunting for default
6716 - Make tor-resolve.c work on win32 by calling network_init().
6718 o Bugfixes on 0.0.9 (other):
6719 - Make 0.0.9.x build on Solaris again.
6720 - Due to a fencepost error, we were blowing away the \n when reporting
6721 confvalue items in the controller. So asking for multiple config
6722 values at once couldn't work.
6723 - When listing circuits that are pending on an opening OR connection,
6724 if we're an OR we were listing circuits that *end* at us as
6725 being pending on every listener, dns/cpu worker, etc. Stop that.
6726 - Dirservers were failing to create 'running-routers' or 'directory'
6727 strings if we had more than some threshold of routers. Fix them so
6728 they can handle any number of routers.
6729 - Fix a superficial "Duplicate mark for close" bug.
6730 - Stop checking for clock skew for OR connections, even for servers.
6731 - Fix a fencepost error that was chopping off the last letter of any
6732 nickname that is the maximum allowed nickname length.
6733 - Update URLs in log messages so they point to the new website.
6734 - Fix a potential problem in mangling server private keys while
6735 writing to disk (not triggered yet, as far as we know).
6736 - Include the licenses for other free software we include in Tor,
6737 now that we're shipping binary distributions more regularly.
6740 Changes in version 0.0.9.1 - 2004-12-15
6741 o Bugfixes on 0.0.9:
6742 - Make hibernation actually work.
6743 - Make HashedControlPassword config option work.
6744 - When we're reporting event circuit status to a controller,
6745 don't use the stream status code.
6748 Changes in version 0.0.9 - 2004-12-12
6750 - Clean up manpage and torrc.sample file.
6751 - Clean up severities and text of log warnings.
6753 - Make servers trigger an assert when they enter hibernation.
6756 Changes in version 0.0.9rc7 - 2004-12-08
6757 o Bugfixes on 0.0.9rc:
6758 - Fix a stack-trashing crash when an exit node begins hibernating.
6759 - Avoid looking at unallocated memory while considering which
6760 ports we need to build circuits to cover.
6761 - Stop a sigpipe: when an 'end' cell races with eof from the app,
6762 we shouldn't hold-open-until-flush if the eof arrived first.
6763 - Fix a bug with init_cookie_authentication() in the controller.
6764 - When recommending new-format log lines, if the upper bound is
6765 LOG_ERR, leave it implicit.
6767 o Bugfixes on 0.0.8.1:
6768 - Fix a whole slew of memory leaks.
6769 - Fix isspace() and friends so they still make Solaris happy
6770 but also so they don't trigger asserts on win32.
6771 - Fix parse_iso_time on platforms without strptime (eg win32).
6772 - win32: tolerate extra "readable" events better.
6773 - win32: when being multithreaded, leave parent fdarray open.
6774 - Make unit tests work on win32.
6777 Changes in version 0.0.9rc6 - 2004-12-06
6778 o Bugfixes on 0.0.9pre:
6779 - Clean up some more integer underflow opportunities (not exploitable
6781 - While hibernating, hup should not regrow our listeners.
6782 - Send an end to the streams we close when we hibernate, rather
6783 than just chopping them off.
6784 - React to eof immediately on non-open edge connections.
6786 o Bugfixes on 0.0.8.1:
6787 - Calculate timeout for waiting for a connected cell from the time
6788 we sent the begin cell, not from the time the stream started. If
6789 it took a long time to establish the circuit, we would time out
6790 right after sending the begin cell.
6791 - Fix router_compare_addr_to_addr_policy: it was not treating a port
6792 of * as always matching, so we were picking reject *:* nodes as
6793 exit nodes too. Oops.
6796 - New circuit building strategy: keep a list of ports that we've
6797 used in the past 6 hours, and always try to have 2 circuits open
6798 or on the way that will handle each such port. Seed us with port
6799 80 so web users won't complain that Tor is "slow to start up".
6800 - Make kill -USR1 dump more useful stats about circuits.
6801 - When warning about retrying or giving up, print the address, so
6802 the user knows which one it's talking about.
6803 - If you haven't used a clean circuit in an hour, throw it away,
6804 just to be on the safe side. (This means after 6 hours a totally
6805 unused Tor client will have no circuits open.)
6808 Changes in version 0.0.9rc5 - 2004-12-01
6809 o Bugfixes on 0.0.8.1:
6810 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
6811 - Let resolve conns retry/expire also, rather than sticking around
6813 - If we are using select, make sure we stay within FD_SETSIZE.
6815 o Bugfixes on 0.0.9pre:
6816 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
6817 but doesn't seem to be currently; thanks to Ilja van Sprundel for
6819 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
6820 instead. Impose minima and maxima for all *Period options; impose
6821 even tighter maxima for fetching if we are a caching dirserver.
6822 Clip rather than rejecting.
6823 - Fetch cached running-routers from servers that serve it (that is,
6824 authdirservers and servers running 0.0.9rc5-cvs or later.)
6827 - Accept *:706 (silc) in default exit policy.
6828 - Implement new versioning format for post 0.1.
6829 - Support "foo.nickname.exit" addresses, to let Alice request the
6830 address "foo" as viewed by exit node "nickname". Based on a patch
6832 - Make tor --version --version dump the cvs Id of every file.
6835 Changes in version 0.0.9rc4 - 2004-11-28
6836 o Bugfixes on 0.0.8.1:
6837 - Make windows sockets actually non-blocking (oops), and handle
6838 win32 socket errors better.
6840 o Bugfixes on 0.0.9rc1:
6841 - Actually catch the -USR2 signal.
6844 Changes in version 0.0.9rc3 - 2004-11-25
6845 o Bugfixes on 0.0.8.1:
6846 - Flush the log file descriptor after we print "Tor opening log file",
6847 so we don't see those messages days later.
6849 o Bugfixes on 0.0.9rc1:
6850 - Make tor-resolve work again.
6851 - Avoid infinite loop in tor-resolve if tor hangs up on it.
6852 - Fix an assert trigger for clients/servers handling resolves.
6855 Changes in version 0.0.9rc2 - 2004-11-24
6856 o Bugfixes on 0.0.9rc1:
6857 - I broke socks5 support while fixing the eof bug.
6858 - Allow unitless bandwidths and intervals; they default to bytes
6860 - New servers don't start out hibernating; they are active until
6861 they run out of bytes, so they have a better estimate of how
6862 long it takes, and so their operators can know they're working.
6865 Changes in version 0.0.9rc1 - 2004-11-23
6866 o Bugfixes on 0.0.8.1:
6867 - Finally fix a bug that's been plaguing us for a year:
6868 With high load, circuit package window was reaching 0. Whenever
6869 we got a circuit-level sendme, we were reading a lot on each
6870 socket, but only writing out a bit. So we would eventually reach
6871 eof. This would be noticed and acted on even when there were still
6872 bytes sitting in the inbuf.
6873 - When poll() is interrupted, we shouldn't believe the revents values.
6875 o Bugfixes on 0.0.9pre6:
6876 - Fix hibernate bug that caused pre6 to be broken.
6877 - Don't keep rephist info for routers that haven't had activity for
6878 24 hours. (This matters now that clients have keys, since we track
6880 - Never call close_temp_logs while validating log options.
6881 - Fix backslash-escaping on tor.sh.in and torctl.in.
6884 - Implement weekly/monthly/daily accounting: now you specify your
6885 hibernation properties by
6886 AccountingMax N bytes|KB|MB|GB|TB
6887 AccountingStart day|week|month [day] HH:MM
6888 Defaults to "month 1 0:00".
6889 - Let bandwidth and interval config options be specified as 5 bytes,
6890 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
6891 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
6892 get back to normal.)
6893 - If your requested entry or exit node has advertised bandwidth 0,
6895 - Be more greedy about filling up relay cells -- we try reading again
6896 once we've processed the stuff we read, in case enough has arrived
6897 to fill the last cell completely.
6898 - Apply NT service patch from Osamu Fujino. Still needs more work.
6901 Changes in version 0.0.9pre6 - 2004-11-15
6902 o Bugfixes on 0.0.8.1:
6903 - Fix assert failure on malformed socks4a requests.
6904 - Use identity comparison, not nickname comparison, to choose which
6905 half of circuit-ID-space each side gets to use. This is needed
6906 because sometimes we think of a router as a nickname, and sometimes
6907 as a hex ID, and we can't predict what the other side will do.
6908 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
6909 write() call will fail and we handle it there.
6910 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
6911 and smartlist_len, which are two major profiling offenders.
6913 o Bugfixes on 0.0.9pre5:
6914 - Fix a bug in read_all that was corrupting config files on windows.
6915 - When we're raising the max number of open file descriptors to
6916 'unlimited', don't log that we just raised it to '-1'.
6917 - Include event code with events, as required by control-spec.txt.
6918 - Don't give a fingerprint when clients do --list-fingerprint:
6919 it's misleading, because it will never be the same again.
6920 - Stop using strlcpy in tor_strndup, since it was slowing us
6922 - Remove warn on startup about missing cached-directory file.
6923 - Make kill -USR1 work again.
6924 - Hibernate if we start tor during the "wait for wakeup-time" phase
6925 of an accounting interval. Log our hibernation plans better.
6926 - Authoritative dirservers now also cache their directory, so they
6927 have it on start-up.
6930 - Fetch running-routers; cache running-routers; compress
6931 running-routers; serve compressed running-routers.z
6932 - Add NSI installer script contributed by J Doe.
6933 - Commit VC6 and VC7 workspace/project files.
6934 - Commit a tor.spec for making RPM files, with help from jbash.
6935 - Add contrib/torctl.in contributed by Glenn Fink.
6936 - Implement the control-spec's SAVECONF command, to write your
6937 configuration to torrc.
6938 - Get cookie authentication for the controller closer to working.
6939 - Include control-spec.txt in the tarball.
6940 - When set_conf changes our server descriptor, upload a new copy.
6941 But don't upload it too often if there are frequent changes.
6942 - Document authentication config in man page, and document signals
6944 - Clean up confusing parts of man page and torrc.sample.
6945 - Make expand_filename handle ~ and ~username.
6946 - Use autoconf to enable largefile support where necessary. Use
6947 ftello where available, since ftell can fail at 2GB.
6948 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
6949 log more informatively.
6950 - Give a slightly more useful output for "tor -h".
6951 - Refuse application socks connections to port 0.
6952 - Check clock skew for verified servers, but allow unverified
6953 servers and clients to have any clock skew.
6954 - Break DirFetchPostPeriod into:
6955 - DirFetchPeriod for fetching full directory,
6956 - StatusFetchPeriod for fetching running-routers,
6957 - DirPostPeriod for posting server descriptor,
6958 - RendPostPeriod for posting hidden service descriptors.
6959 - Make sure the hidden service descriptors are at a random offset
6960 from each other, to hinder linkability.
6963 Changes in version 0.0.9pre5 - 2004-11-09
6964 o Bugfixes on 0.0.9pre4:
6965 - Fix a seg fault in unit tests (doesn't affect main program).
6966 - Fix an assert bug where a hidden service provider would fail if
6967 the first hop of his rendezvous circuit was down.
6968 - Hidden service operators now correctly handle version 1 style
6969 INTRODUCE1 cells (nobody generates them still, so not a critical
6971 - If do_hup fails, actually notice.
6972 - Handle more errnos from accept() without closing the listener.
6973 Some OpenBSD machines were closing their listeners because
6974 they ran out of file descriptors.
6975 - Send resolve cells to exit routers that are running a new
6976 enough version of the resolve code to work right.
6977 - Better handling of winsock includes on non-MSV win32 compilers.
6978 - Some people had wrapped their tor client/server in a script
6979 that would restart it whenever it died. This did not play well
6980 with our "shut down if your version is obsolete" code. Now people
6981 don't fetch a new directory if their local cached version is
6983 - Make our autogen.sh work on ksh as well as bash.
6986 - Hibernation: New config option "AccountingMaxKB" lets you
6987 set how many KBytes per month you want to allow your server to
6988 consume. Rather than spreading those bytes out evenly over the
6989 month, we instead hibernate for some of the month and pop up
6990 at a deterministic time, work until the bytes are consumed, then
6991 hibernate again. Config option "MonthlyAccountingStart" lets you
6992 specify which day of the month your billing cycle starts on.
6993 - Control interface: a separate program can now talk to your
6994 client/server over a socket, and get/set config options, receive
6995 notifications of circuits and streams starting/finishing/dying,
6996 bandwidth used, etc. The next step is to get some GUIs working.
6997 Let us know if you want to help out. See doc/control-spec.txt .
6998 - Ship a contrib/tor-control.py as an example script to interact
6999 with the control port.
7000 - "tor --hash-password zzyxz" will output a salted password for
7001 use in authenticating to the control interface.
7002 - New log format in config:
7003 "Log minsev[-maxsev] stdout|stderr|syslog" or
7004 "Log minsev[-maxsev] file /var/foo"
7007 - DirPolicy config option, to let people reject incoming addresses
7008 from their dirserver.
7009 - "tor --list-fingerprint" will list your identity key fingerprint
7011 - Add "pass" target for RedirectExit, to make it easier to break
7012 out of a sequence of RedirectExit rules.
7013 - Clients now generate a TLS cert too, in preparation for having
7014 them act more like real nodes.
7015 - Ship src/win32/ in the tarball, so people can use it to build.
7016 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
7018 - New "router-status" line in directory, to better bind each verified
7019 nickname to its identity key.
7020 - Deprecate unofficial config option abbreviations, and abbreviations
7021 not on the command line.
7022 - Add a pure-C tor-resolve implementation.
7023 - Use getrlimit and friends to ensure we can reach MaxConn (currently
7024 1024) file descriptors.
7026 o Code security improvements, inspired by Ilja:
7027 - Replace sprintf with snprintf. (I think they were all safe, but
7029 - Replace strcpy/strncpy with strlcpy in more places.
7030 - Avoid strcat; use snprintf or strlcat instead.
7031 - snprintf wrapper with consistent (though not C99) overflow behavior.
7034 Changes in version 0.0.9pre4 - 2004-10-17
7035 o Bugfixes on 0.0.9pre3:
7036 - If the server doesn't specify an exit policy, use the real default
7037 exit policy, not reject *:*.
7038 - Ignore fascistfirewall when uploading/downloading hidden service
7039 descriptors, since we go through Tor for those; and when using
7040 an HttpProxy, since we assume it can reach them all.
7041 - When looking for an authoritative dirserver, use only the ones
7042 configured at boot. Don't bother looking in the directory.
7043 - The rest of the fix for get_default_conf_file() on older win32.
7044 - Make 'Routerfile' config option obsolete.
7047 - New 'MyFamily nick1,...' config option for a server to
7048 specify other servers that shouldn't be used in the same circuit
7049 with it. Only believed if nick1 also specifies us.
7050 - New 'NodeFamily nick1,nick2,...' config option for a client to
7051 specify nodes that it doesn't want to use in the same circuit.
7052 - New 'Redirectexit pattern address:port' config option for a
7053 server to redirect exit connections, e.g. to a local squid.
7056 Changes in version 0.0.9pre3 - 2004-10-13
7057 o Bugfixes on 0.0.8.1:
7058 - Better torrc example lines for dirbindaddress and orbindaddress.
7059 - Improved bounds checking on parsed ints (e.g. config options and
7060 the ones we find in directories.)
7061 - Better handling of size_t vs int, so we're more robust on 64
7063 - Fix the rest of the bug where a newly started OR would appear
7064 as unverified even after we've added his fingerprint and hupped
7066 - Fix a bug from 0.0.7: when read() failed on a stream, we would
7067 close it without sending back an end. So 'connection refused'
7068 would simply be ignored and the user would get no response.
7070 o Bugfixes on 0.0.9pre2:
7071 - Serving the cached-on-disk directory to people is bad. We now
7072 provide no directory until we've fetched a fresh one.
7073 - Workaround for bug on windows where cached-directories get crlf
7075 - Make get_default_conf_file() work on older windows too.
7076 - If we write a *:* exit policy line in the descriptor, don't write
7077 any more exit policy lines.
7080 - Use only 0.0.9pre1 and later servers for resolve cells.
7081 - Make the dirservers file obsolete.
7082 - Include a dir-signing-key token in directories to tell the
7083 parsing entity which key is being used to sign.
7084 - Remove the built-in bulky default dirservers string.
7085 - New config option "Dirserver %s:%d [fingerprint]", which can be
7086 repeated as many times as needed. If no dirservers specified,
7087 default to moria1,moria2,tor26.
7088 - Make moria2 advertise a dirport of 80, so people behind firewalls
7089 will be able to get a directory.
7090 - Http proxy support
7091 - Dirservers translate requests for http://%s:%d/x to /x
7092 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
7093 be routed through this host.
7094 - Clients ask for /tor/x rather than /x for new enough dirservers.
7095 This way we can one day coexist peacefully with apache.
7096 - Clients specify a "Host: %s%d" http header, to be compatible
7097 with more proxies, and so running squid on an exit node can work.
7100 Changes in version 0.0.8.1 - 2004-10-13
7102 - Fix a seg fault that can be triggered remotely for Tor
7103 clients/servers with an open dirport.
7104 - Fix a rare assert trigger, where routerinfos for entries in
7105 our cpath would expire while we're building the path.
7106 - Fix a bug in OutboundBindAddress so it (hopefully) works.
7107 - Fix a rare seg fault for people running hidden services on
7108 intermittent connections.
7109 - Fix a bug in parsing opt keywords with objects.
7110 - Fix a stale pointer assert bug when a stream detaches and
7112 - Fix a string format vulnerability (probably not exploitable)
7113 in reporting stats locally.
7114 - Fix an assert trigger: sometimes launching circuits can fail
7115 immediately, e.g. because too many circuits have failed recently.
7116 - Fix a compile warning on 64 bit platforms.
7119 Changes in version 0.0.9pre2 - 2004-10-03
7121 - Make fetching a cached directory work for 64-bit platforms too.
7122 - Make zlib.h a required header, not an optional header.
7125 Changes in version 0.0.9pre1 - 2004-10-01
7127 - Stop using separate defaults for no-config-file and
7128 empty-config-file. Now you have to explicitly turn off SocksPort,
7129 if you don't want it open.
7130 - Fix a bug in OutboundBindAddress so it (hopefully) works.
7131 - Improve man page to mention more of the 0.0.8 features.
7132 - Fix a rare seg fault for people running hidden services on
7133 intermittent connections.
7134 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
7136 - Fix more dns related bugs: send back resolve_failed and end cells
7137 more reliably when the resolve fails, rather than closing the
7138 circuit and then trying to send the cell. Also attach dummy resolve
7139 connections to a circuit *before* calling dns_resolve(), to fix
7140 a bug where cached answers would never be sent in RESOLVED cells.
7141 - When we run out of disk space, or other log writing error, don't
7142 crash. Just stop logging to that log and continue.
7143 - We were starting to daemonize before we opened our logs, so if
7144 there were any problems opening logs, we would complain to stderr,
7145 which wouldn't work, and then mysteriously exit.
7146 - Fix a rare bug where sometimes a verified OR would connect to us
7147 before he'd uploaded his descriptor, which would cause us to
7148 assign conn->nickname as though he's unverified. Now we look through
7149 the fingerprint list to see if he's there.
7150 - Fix a rare assert trigger, where routerinfos for entries in
7151 our cpath would expire while we're building the path.
7154 - Clients can ask dirservers for /dir.z to get a compressed version
7155 of the directory. Only works for servers running 0.0.9, of course.
7156 - Make clients cache directories and use them to seed their router
7157 lists at startup. This means clients have a datadir again.
7158 - Configuration infrastructure support for warning on obsolete
7160 - Respond to content-encoding headers by trying to uncompress as
7162 - Reply with a deflated directory when a client asks for "dir.z".
7163 We could use allow-encodings instead, but allow-encodings isn't
7164 specified in HTTP 1.0.
7165 - Raise the max dns workers from 50 to 100.
7166 - Discourage people from setting their dirfetchpostperiod more often
7167 than once per minute.
7168 - Protect dirservers from overzealous descriptor uploading -- wait
7169 10 seconds after directory gets dirty, before regenerating.
7172 Changes in version 0.0.8 - 2004-08-25
7173 o Port it to SunOS 5.9 / Athena
7176 Changes in version 0.0.8rc2 - 2004-08-20
7177 o Make it compile on cygwin again.
7178 o When picking unverified routers, skip those with low uptime and/or
7179 low bandwidth, depending on what properties you care about.
7182 Changes in version 0.0.8rc1 - 2004-08-18
7183 o Changes from 0.0.7.3:
7185 - Fix assert triggers: if the other side returns an address 0.0.0.0,
7186 don't put it into the client dns cache.
7187 - If a begin failed due to exit policy, but we believe the IP address
7188 should have been allowed, switch that router to exitpolicy reject *:*
7189 until we get our next directory.
7191 - Clients choose nodes proportional to advertised bandwidth.
7192 - Avoid using nodes with low uptime as introduction points.
7193 - Handle servers with dynamic IP addresses: don't replace
7194 options->Address with the resolved one at startup, and
7195 detect our address right before we make a routerinfo each time.
7196 - 'FascistFirewall' option to pick dirservers and ORs on specific
7197 ports; plus 'FirewallPorts' config option to tell FascistFirewall
7198 which ports are open. (Defaults to 80,443)
7199 - Be more aggressive about trying to make circuits when the network
7200 has changed (e.g. when you unsuspend your laptop).
7201 - Check for time skew on http headers; report date in response to
7203 - If the entrynode config line has only one node, don't pick it as
7205 - Add strict{entry|exit}nodes config options. If set to 1, then
7206 we refuse to build circuits that don't include the specified entry
7208 - OutboundBindAddress config option, to bind to a specific
7209 IP address for outgoing connect()s.
7210 - End truncated log entries (e.g. directories) with "[truncated]".
7212 o Patches to 0.0.8preX:
7214 - Patches to compile and run on win32 again (maybe)?
7215 - Fix crash when looking for ~/.torrc with no $HOME set.
7216 - Fix a race bug in the unit tests.
7217 - Handle verified/unverified name collisions better when new
7218 routerinfo's arrive in a directory.
7219 - Sometimes routers were getting entered into the stats before
7220 we'd assigned their identity_digest. Oops.
7221 - Only pick and establish intro points after we've gotten a
7224 - AllowUnverifiedNodes config option to let circuits choose no-name
7225 routers in entry,middle,exit,introduction,rendezvous positions.
7226 Allow middle and rendezvous positions by default.
7227 - Add a man page for tor-resolve.
7230 Changes in version 0.0.7.3 - 2004-08-12
7231 o Stop dnsworkers from triggering an assert failure when you
7232 ask them to resolve the host "".
7235 Changes in version 0.0.8pre3 - 2004-08-09
7236 o Changes from 0.0.7.2:
7237 - Allow multiple ORs with same nickname in routerlist -- now when
7238 people give us one identity key for a nickname, then later
7239 another, we don't constantly complain until the first expires.
7240 - Remember used bandwidth (both in and out), and publish 15-minute
7241 snapshots for the past day into our descriptor.
7242 - You can now fetch $DIRURL/running-routers to get just the
7243 running-routers line, not the whole descriptor list. (But
7244 clients don't use this yet.)
7245 - When people mistakenly use Tor as an http proxy, point them
7246 at the tor-doc.html rather than the INSTALL.
7247 - Remove our mostly unused -- and broken -- hex_encode()
7248 function. Use base16_encode() instead. (Thanks to Timo Lindfors
7249 for pointing out this bug.)
7250 - Rotate onion keys every 12 hours, not every 2 hours, so we have
7251 fewer problems with people using the wrong key.
7252 - Change the default exit policy to reject the default edonkey,
7253 kazaa, gnutella ports.
7254 - Add replace_file() to util.[ch] to handle win32's rename().
7256 o Changes from 0.0.8preX:
7257 - Fix two bugs in saving onion keys to disk when rotating, so
7258 hopefully we'll get fewer people using old onion keys.
7259 - Fix an assert error that was making SocksPolicy not work.
7260 - Be willing to expire routers that have an open dirport -- it's
7261 just the authoritative dirservers we want to not forget.
7262 - Reject tor-resolve requests for .onion addresses early, so we
7263 don't build a whole rendezvous circuit and then fail.
7264 - When you're warning a server that he's unverified, don't cry
7266 - Fix a race condition: don't try to extend onto a connection
7267 that's still handshaking.
7268 - For servers in clique mode, require the conn to be open before
7269 you'll choose it for your path.
7270 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
7271 end relay cell, etc.
7272 - Measure bandwidth capacity over the last 24 hours, not just 12
7273 - Bugfix: authoritative dirservers were making and signing a new
7274 directory for each client, rather than reusing the cached one.
7277 Changes in version 0.0.8pre2 - 2004-08-04
7278 o Changes from 0.0.7.2:
7280 - Check directory signature _before_ you decide whether you're
7281 you're running an obsolete version and should exit.
7282 - Check directory signature _before_ you parse the running-routers
7283 list to decide who's running or verified.
7284 - Bugfixes and features:
7285 - Check return value of fclose while writing to disk, so we don't
7286 end up with broken files when servers run out of disk space.
7287 - Log a warning if the user uses an unsafe socks variant, so people
7288 are more likely to learn about privoxy or socat.
7289 - Dirservers now include RFC1123-style dates in the HTTP headers,
7290 which one day we will use to better detect clock skew.
7292 o Changes from 0.0.8pre1:
7293 - Make it compile without warnings again on win32.
7294 - Log a warning if you're running an unverified server, to let you
7295 know you might want to get it verified.
7296 - Only pick a default nickname if you plan to be a server.
7299 Changes in version 0.0.8pre1 - 2004-07-23
7301 - Made our unit tests compile again on OpenBSD 3.5, and tor
7302 itself compile again on OpenBSD on a sparc64.
7303 - We were neglecting milliseconds when logging on win32, so
7304 everything appeared to happen at the beginning of each second.
7307 - 'Extend' relay cell payloads now include the digest of the
7308 intended next hop's identity key. Now we can verify that we're
7309 extending to the right router, and also extend to routers we
7310 hadn't heard of before.
7313 - Tor nodes can now act as relays (with an advertised ORPort)
7314 without being manually verified by the dirserver operators.
7315 - Uploaded descriptors of unverified routers are now accepted
7316 by the dirservers, and included in the directory.
7317 - Verified routers are listed by nickname in the running-routers
7318 list; unverified routers are listed as "$<fingerprint>".
7319 - We now use hash-of-identity-key in most places rather than
7320 nickname or addr:port, for improved security/flexibility.
7321 - To avoid Sybil attacks, paths still use only verified servers.
7322 But now we have a chance to play around with hybrid approaches.
7323 - Nodes track bandwidth usage to estimate capacity (not used yet).
7324 - ClientOnly option for nodes that never want to become servers.
7325 - Directory caching.
7326 - "AuthoritativeDir 1" option for the official dirservers.
7327 - Now other nodes (clients and servers) will cache the latest
7328 directory they've pulled down.
7329 - They can enable their DirPort to serve it to others.
7330 - Clients will pull down a directory from any node with an open
7331 DirPort, and check the signature/timestamp correctly.
7332 - Authoritative dirservers now fetch directories from other
7333 authdirservers, to stay better synced.
7334 - Running-routers list tells who's down also, along with noting
7335 if they're verified (listed by nickname) or unverified (listed
7337 - Allow dirservers to serve running-router list separately.
7338 This isn't used yet.
7339 - ORs connect-on-demand to other ORs
7340 - If you get an extend cell to an OR you're not connected to,
7341 connect, handshake, and forward the create cell.
7342 - The authoritative dirservers stay connected to everybody,
7343 and everybody stays connected to 0.0.7 servers, but otherwise
7344 clients/servers expire unused connections after 5 minutes.
7345 - When servers get a sigint, they delay 30 seconds (refusing new
7346 connections) then exit. A second sigint causes immediate exit.
7347 - File and name management:
7348 - Look for .torrc if no CONFDIR "torrc" is found.
7349 - If no datadir is defined, then choose, make, and secure ~/.tor
7351 - If torrc not found, exitpolicy reject *:*.
7352 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
7353 - If no nickname is defined, derive default from hostname.
7354 - Rename secret key files, e.g. identity.key -> secret_id_key,
7355 to discourage people from mailing their identity key to tor-ops.
7356 - Refuse to build a circuit before the directory has arrived --
7357 it won't work anyway, since you won't know the right onion keys
7359 - Try other dirservers immediately if the one you try is down. This
7360 should tolerate down dirservers better now.
7361 - Parse tor version numbers so we can do an is-newer-than check
7362 rather than an is-in-the-list check.
7363 - New socks command 'resolve', to let us shim gethostbyname()
7365 - A 'tor_resolve' script to access the socks resolve functionality.
7366 - A new socks-extensions.txt doc file to describe our
7367 interpretation and extensions to the socks protocols.
7368 - Add a ContactInfo option, which gets published in descriptor.
7369 - Publish OR uptime in descriptor (and thus in directory) too.
7370 - Write tor version at the top of each log file
7371 - New docs in the tarball:
7373 - Document that you should proxy your SSL traffic too.
7376 Changes in version 0.0.7.2 - 2004-07-07
7377 o A better fix for the 0.0.0.0 problem, that will hopefully
7378 eliminate the remaining related assertion failures.
7381 Changes in version 0.0.7.1 - 2004-07-04
7382 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
7383 since internally we use 0.0.0.0 to signify "not yet resolved".
7386 Changes in version 0.0.7 - 2004-06-07
7387 o Updated the man page to reflect the new features.
7390 Changes in version 0.0.7rc2 - 2004-06-06
7391 o Changes from 0.0.7rc1:
7392 - Make it build on Win32 again.
7393 o Changes from 0.0.6.2:
7394 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
7398 Changes in version 0.0.7rc1 - 2004-06-02
7400 - On sighup, we were adding another log without removing the first
7401 one. So log messages would get duplicated n times for n sighups.
7402 - Several cases of using a connection after we'd freed it. The
7403 problem was that connections that are pending resolve are in both
7404 the pending_resolve tree, and also the circuit's resolving_streams
7405 list. When you want to remove one, you must remove it from both.
7406 - Fix a double-mark-for-close where an end cell arrived for a
7407 resolving stream, and then the resolve failed.
7408 - Check directory signatures based on name of signer, not on whom
7409 we got the directory from. This will let us cache directories more
7412 - Crank up some of our constants to handle more users.
7415 Changes in version 0.0.7pre1 - 2004-06-02
7416 o Fixes for crashes and other obnoxious bugs:
7417 - Fix an epipe bug: sometimes when directory connections failed
7418 to connect, we would give them a chance to flush before closing
7420 - When we detached from a circuit because of resolvefailed, we
7421 would immediately try the same circuit twice more, and then
7422 give up on the resolve thinking we'd tried three different
7424 - Limit the number of intro circuits we'll attempt to build for a
7425 hidden service per 15-minute period.
7426 - Check recommended-software string *early*, before actually parsing
7427 the directory. Thus we can detect an obsolete version and exit,
7428 even if the new directory format doesn't parse.
7429 o Fixes for security bugs:
7430 - Remember which nodes are dirservers when you startup, and if a
7431 random OR enables his dirport, don't automatically assume he's
7432 a trusted dirserver.
7434 - Directory connections were asking the wrong poll socket to
7435 start writing, and not asking themselves to start writing.
7436 - When we detached from a circuit because we sent a begin but
7437 didn't get a connected, we would use it again the first time;
7438 but after that we would correctly switch to a different one.
7439 - Stop warning when the first onion decrypt attempt fails; they
7440 will sometimes legitimately fail now that we rotate keys.
7441 - Override unaligned-access-ok check when $host_cpu is ia64 or
7442 arm. Apparently they allow it but the kernel whines.
7443 - Dirservers try to reconnect periodically too, in case connections
7445 - Fix some memory leaks in directory servers.
7446 - Allow backslash in Win32 filenames.
7447 - Made Tor build complain-free on FreeBSD, hopefully without
7448 breaking other BSD builds. We'll see.
7450 - Doxygen markup on all functions and global variables.
7451 - Make directory functions update routerlist, not replace it. So
7452 now directory disagreements are not so critical a problem.
7453 - Remove the upper limit on number of descriptors in a dirserver's
7454 directory (not that we were anywhere close).
7455 - Allow multiple logfiles at different severity ranges.
7456 - Allow *BindAddress to specify ":port" rather than setting *Port
7457 separately. Allow multiple instances of each BindAddress config
7458 option, so you can bind to multiple interfaces if you want.
7459 - Allow multiple exit policy lines, which are processed in order.
7460 Now we don't need that huge line with all the commas in it.
7461 - Enable accept/reject policies on SOCKS connections, so you can bind
7462 to 0.0.0.0 but still control who can use your OP.
7465 Changes in version 0.0.6.2 - 2004-05-16
7466 o Our integrity-checking digest was checking only the most recent cell,
7467 not the previous cells like we'd thought.
7468 Thanks to Stefan Mark for finding the flaw!
7471 Changes in version 0.0.6.1 - 2004-05-06
7472 o Fix two bugs in our AES counter-mode implementation (this affected
7473 onion-level stream encryption, but not TLS-level). It turns
7474 out we were doing something much more akin to a 16-character
7475 polyalphabetic cipher. Oops.
7476 Thanks to Stefan Mark for finding the flaw!
7477 o Retire moria3 as a directory server, and add tor26 as a directory
7481 Changes in version 0.0.6 - 2004-05-02
7485 Changes in version 0.0.6rc4 - 2004-05-01
7486 o Update the built-in dirservers list to use the new directory format
7487 o Fix a rare seg fault: if a node offering a hidden service attempts
7488 to build a circuit to Alice's rendezvous point and fails before it
7489 reaches the last hop, it retries with a different circuit, but
7491 o Handle windows socket errors correctly.
7494 Changes in version 0.0.6rc3 - 2004-04-28
7495 o Don't expire non-general excess circuits (if we had enough
7496 circuits open, we were expiring rendezvous circuits -- even
7497 when they had a stream attached. oops.)
7498 o Fetch randomness from /dev/urandom better (not via fopen/fread)
7499 o Better debugging for tls errors
7500 o Some versions of openssl have an SSL_pending function that erroneously
7501 returns bytes when there is a non-application record pending.
7502 o Set Content-Type on the directory and hidserv descriptor.
7503 o Remove IVs from cipher code, since AES-ctr has none.
7504 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
7505 o We were using an array of length zero in a few places.
7506 o win32's gethostbyname can't resolve an IP to an IP.
7507 o win32's close can't close a socket.
7510 Changes in version 0.0.6rc2 - 2004-04-26
7511 o Fix a bug where we were closing tls connections intermittently.
7512 It turns out openssl keeps its errors around -- so if an error
7513 happens, and you don't ask about it, and then another openssl
7514 operation happens and succeeds, and you ask if there was an error,
7515 it tells you about the first error. Fun fun.
7516 o Fix a bug that's been lurking since 27 may 03 (!)
7517 When passing back a destroy cell, we would use the wrong circ id.
7518 'Mostly harmless', but still worth fixing.
7519 o Since we don't support truncateds much, don't bother sending them;
7520 just close the circ.
7521 o check for <machine/limits.h> so we build on NetBSD again (I hope).
7522 o don't crash if a conn that sent a begin has suddenly lost its circuit
7523 (this was quite rare).
7526 Changes in version 0.0.6rc1 - 2004-04-25
7527 o We now rotate link (tls context) keys and onion keys.
7528 o CREATE cells now include oaep padding, so you can tell
7529 if you decrypted them correctly.
7530 o Add bandwidthburst to server descriptor.
7531 o Directories now say which dirserver signed them.
7532 o Use a tor_assert macro that logs failed assertions too.
7535 Changes in version 0.0.6pre5 - 2004-04-18
7536 o changes from 0.0.6pre4:
7537 - make tor build on broken freebsd 5.2 installs
7538 - fix a failed assert when you try an intro point, get a nack, and try
7539 a second one and it works.
7540 - when alice uses a port that the hidden service doesn't accept,
7541 it now sends back an end cell (denied by exit policy). otherwise
7542 alice would just have to wait to time out.
7543 - fix another rare bug: when we had tried all the intro
7544 points for a hidden service, we fetched the descriptor
7545 again, but we left our introcirc thinking it had already
7546 sent an intro, so it kept waiting for a response...
7547 - bugfix: when you sleep your hidden-service laptop, as soon
7548 as it wakes up it tries to upload a service descriptor, but
7549 socketpair fails for some reason (localhost not up yet?).
7550 now we simply give up on that upload, and we'll try again later.
7551 i'd still like to find the bug though.
7552 - if an intro circ waiting for an ack dies before getting one, then
7554 - we were reusing stale service descriptors and refetching usable
7558 Changes in version 0.0.6pre4 - 2004-04-14
7559 o changes from 0.0.6pre3:
7560 - when bob fails to connect to the rendezvous point, and his
7561 circ didn't fail because of the rendezvous point itself, then
7562 he retries a couple of times
7563 - we expire introduction and rendezvous circs more thoroughly
7564 (sometimes they were hanging around forever)
7565 - we expire unattached rendezvous streams that have been around
7566 too long (they were sticking around forever).
7567 - fix a measly fencepost error that was crashing everybody with
7571 Changes in version 0.0.6pre3 - 2004-04-14
7572 o changes from 0.0.6pre2:
7573 - make hup work again
7574 - fix some memory leaks for dirservers
7575 - allow more skew in rendezvous descriptor timestamps, to help
7576 handle people like blanu who don't know what time it is
7577 - normal circs are 3 hops, but some rend/intro circs are 4, if
7578 the initiator doesn't get to choose the last hop
7579 - send acks for introductions, so alice can know whether to try
7581 - bob publishes intro points more correctly
7582 o changes from 0.0.5:
7583 - fix an assert trigger that's been plaguing us since the days
7584 of 0.0.2prexx (thanks weasel!)
7585 - retry stream correctly when we fail to connect because of
7586 exit-policy-reject (should try another) or can't-resolve-address
7587 (also should try another, because dns on random internet servers
7589 - when we hup a dirserver and we've *removed* a server from the
7590 approved-routers list, now we remove that server from the
7591 in-memory directories too
7594 Changes in version 0.0.6pre2 - 2004-04-08
7595 o We fixed our base32 implementation. Now it works on all architectures.
7598 Changes in version 0.0.6pre1 - 2004-04-08
7600 - Hidden services and rendezvous points are implemented. Go to
7601 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
7602 hidden services. (This only works via a socks4a proxy such as
7603 Privoxy, and currently it's quite slow.)
7606 Changes in version 0.0.5 - 2004-03-30
7610 Changes in version 0.0.5rc3 - 2004-03-29
7611 o Install torrc as torrc.sample -- we no longer clobber your
7613 o Re-enable recommendedversion checking (we broke it in rc2, oops)
7614 o Add in a 'notice' log level for things the operator should hear
7615 but that aren't warnings
7618 Changes in version 0.0.5rc2 - 2004-03-29
7619 o Hold socks connection open until reply is flushed (if possible)
7620 o Make exit nodes resolve IPs to IPs immediately, rather than asking
7621 the dns farm to do it.
7622 o Fix c99 aliasing warnings in rephist.c
7623 o Don't include server descriptors that are older than 24 hours in the
7625 o Give socks 'reject' replies their whole 15s to attempt to flush,
7626 rather than seeing the 60s timeout and assuming the flush had failed.
7627 o Clean automake droppings from the cvs repository
7630 Changes in version 0.0.5rc1 - 2004-03-28
7631 o Fix mangled-state bug in directory fetching (was causing sigpipes).
7632 o Only build circuits after we've fetched the directory: clients were
7633 using only the directory servers before they'd fetched a directory.
7634 This also means longer startup time; so it goes.
7635 o Fix an assert trigger where an OP would fail to handshake, and we'd
7636 expect it to have a nickname.
7637 o Work around a tsocks bug: do a socks reject when AP connection dies
7638 early, else tsocks goes into an infinite loop.
7641 Changes in version 0.0.4 - 2004-03-26
7642 o When connecting to a dirserver or OR and the network is down,
7646 Changes in version 0.0.3 - 2004-03-26
7647 o Warn and fail if server chose a nickname with illegal characters
7648 o Port to Solaris and Sparc:
7649 - include missing header fcntl.h
7650 - have autoconf find -lsocket -lnsl automatically
7651 - deal with hardware word alignment
7652 - make uname() work (solaris has a different return convention)
7653 - switch from using signal() to sigaction()
7654 o Preliminary work on reputation system:
7655 - Keep statistics on success/fail of connect attempts; they're published
7656 by kill -USR1 currently.
7657 - Add a RunTesting option to try to learn link state by creating test
7658 circuits, even when SocksPort is off.
7659 - Remove unused open circuits when there are too many.
7662 Changes in version 0.0.2 - 2004-03-19
7663 - Include strlcpy and strlcat for safer string ops
7664 - define INADDR_NONE so we compile (but still not run) on solaris
7667 Changes in version 0.0.2pre27 - 2004-03-14
7669 - Allow internal tor networks (we were rejecting internal IPs,
7670 now we allow them if they're set explicitly).
7671 - And fix a few endian issues.
7674 Changes in version 0.0.2pre26 - 2004-03-14
7676 - If a stream times out after 15s without a connected cell, don't
7677 try that circuit again: try a new one.
7678 - Retry streams at most 4 times. Then give up.
7679 - When a dirserver gets a descriptor from an unknown router, it
7680 logs its fingerprint (so the dirserver operator can choose to
7681 accept it even without mail from the server operator).
7682 - Inform unapproved servers when we reject their descriptors.
7683 - Make tor build on Windows again. It works as a client, who knows
7685 - Clearer instructions in the torrc for how to set up a server.
7686 - Be more efficient about reading fd's when our global token bucket
7687 (used for rate limiting) becomes empty.
7689 - Stop asserting that computers always go forward in time. It's
7691 - When we sent a cell (e.g. destroy) and then marked an OR connection
7692 expired, we might close it before finishing a flush if the other
7693 side isn't reading right then.
7694 - Don't allow dirservers to start if they haven't defined
7696 - We were caching transient dns failures. Oops.
7697 - Prevent servers from publishing an internal IP as their address.
7698 - Address a strcat vulnerability in circuit.c
7701 Changes in version 0.0.2pre25 - 2004-03-04
7703 - Put the OR's IP in its router descriptor, not its fqdn. That way
7704 we'll stop being stalled by gethostbyname for nodes with flaky dns,
7707 - If the user typed in an address that didn't resolve, the server
7711 Changes in version 0.0.2pre24 - 2004-03-03
7713 - Fix an assertion failure in dns.c, where we were trying to dequeue
7714 a pending dns resolve even if it wasn't pending
7715 - Fix a spurious socks5 warning about still trying to write after the
7716 connection is finished.
7717 - Hold certain marked_for_close connections open until they're finished
7718 flushing, rather than losing bytes by closing them too early.
7719 - Correctly report the reason for ending a stream
7720 - Remove some duplicate calls to connection_mark_for_close
7721 - Put switch_id and start_daemon earlier in the boot sequence, so it
7722 will actually try to chdir() to options.DataDirectory
7723 - Make 'make test' exit(1) if a test fails; fix some unit tests
7724 - Make tor fail when you use a config option it doesn't know about,
7725 rather than warn and continue.
7726 - Make --version work
7727 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
7730 Changes in version 0.0.2pre23 - 2004-02-29
7732 - Print a statement when the first circ is finished, so the user
7734 - If a relay cell is unrecognized at the end of the circuit,
7735 send back a destroy. (So attacks to mutate cells are more
7737 - New config option 'excludenodes' to avoid certain nodes for circuits.
7738 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
7739 so you can collect coredumps there.
7741 - Fix a bug in tls flushing where sometimes data got wedged and
7742 didn't flush until more data got sent. Hopefully this bug was
7743 a big factor in the random delays we were seeing.
7744 - Make 'connected' cells include the resolved IP, so the client
7745 dns cache actually gets populated.
7746 - Disallow changing from ORPort=0 to ORPort>0 on hup.
7747 - When we time-out on a stream and detach from the circuit, send an
7748 end cell down it first.
7749 - Only warn about an unknown router (in exitnodes, entrynodes,
7750 excludenodes) after we've fetched a directory.
7753 Changes in version 0.0.2pre22 - 2004-02-26
7755 - Servers publish less revealing uname information in descriptors.
7756 - More memory tracking and assertions, to crash more usefully when
7758 - If the default torrc isn't there, just use some default defaults.
7759 Plus provide an internal dirservers file if they don't have one.
7760 - When the user tries to use Tor as an http proxy, give them an http
7761 501 failure explaining that we're a socks proxy.
7762 - Dump a new router.desc on hup, to help confused people who change
7763 their exit policies and then wonder why router.desc doesn't reflect
7765 - Clean up the generic tor.sh init script that we ship with.
7767 - If the exit stream is pending on the resolve, and a destroy arrives,
7768 then the stream wasn't getting removed from the pending list. I
7769 think this was the one causing recent server crashes.
7770 - Use a more robust poll on OSX 10.3, since their poll is flaky.
7771 - When it couldn't resolve any dirservers, it was useless from then on.
7772 Now it reloads the RouterFile (or default dirservers) if it has no
7774 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
7775 many users don't even *have* a /usr/local/sbin/.
7778 Changes in version 0.0.2pre21 - 2004-02-18
7780 - There's a ChangeLog file that actually reflects the changelog.
7781 - There's a 'torify' wrapper script, with an accompanying
7782 tor-tsocks.conf, that simplifies the process of using tsocks for
7783 tor. It even has a man page.
7784 - The tor binary gets installed to sbin rather than bin now.
7785 - Retry streams where the connected cell hasn't arrived in 15 seconds
7786 - Clean up exit policy handling -- get the default out of the torrc,
7787 so we can update it without forcing each server operator to fix
7789 - Allow imaps and pop3s in default exit policy
7791 - Prevent picking middleman nodes as the last node in the circuit
7794 Changes in version 0.0.2pre20 - 2004-01-30
7796 - We now have a deb package, and it's in debian unstable. Go to
7798 - I've split the TotalBandwidth option into BandwidthRate (how many
7799 bytes per second you want to allow, long-term) and
7800 BandwidthBurst (how many bytes you will allow at once before the cap
7801 kicks in). This better token bucket approach lets you, say, set
7802 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
7803 performance while not exceeding your monthly bandwidth quota.
7804 - Push out a tls record's worth of data once you've got it, rather
7805 than waiting until you've read everything waiting to be read. This
7806 may improve performance by pipelining better. We'll see.
7807 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
7808 from failed circuits (if they haven't been connected yet) and attach
7810 - Expire old streams that haven't managed to connect. Some day we'll
7811 have them reattach to new circuits instead.
7814 - Fix several memory leaks that were causing servers to become bloated
7816 - Fix a few very rare assert triggers. A few more remain.
7817 - Setuid to User _before_ complaining about running as root.
7820 Changes in version 0.0.2pre19 - 2004-01-07
7822 - Fix deadlock condition in dns farm. We were telling a child to die by
7823 closing the parent's file descriptor to him. But newer children were
7824 inheriting the open file descriptor from the parent, and since they
7825 weren't closing it, the socket never closed, so the child never read
7826 eof, so he never knew to exit. Similarly, dns workers were holding
7827 open other sockets, leading to all sorts of chaos.
7828 - New cleaner daemon() code for forking and backgrounding.
7829 - If you log to a file, it now prints an entry at the top of the
7830 logfile so you know it's working.
7831 - The onionskin challenge length was 30 bytes longer than necessary.
7832 - Started to patch up the spec so it's not quite so out of date.
7835 Changes in version 0.0.2pre18 - 2004-01-02
7837 - Fix endian issues with the 'integrity' field in the relay header.
7838 - Fix a potential bug where connections in state
7839 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
7842 Changes in version 0.0.2pre17 - 2003-12-30
7844 - Made --debuglogfile (or any second log file, actually) work.
7845 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
7846 adversary could force us into an infinite loop.
7849 - Each onionskin handshake now includes a hash of the computed key,
7850 to prove the server's identity and help perfect forward secrecy.
7851 - Changed cell size from 256 to 512 bytes (working toward compatibility
7853 - Changed cell length to 2 bytes, and moved it to the relay header.
7854 - Implemented end-to-end integrity checking for the payloads of
7856 - Separated streamid from 'recognized' (otherwise circuits will get
7857 messed up when we try to have streams exit from the middle). We
7858 use the integrity-checking to confirm that a cell is addressed to
7860 - Randomize the initial circid and streamid values, so an adversary who
7861 breaks into a node can't learn how many circuits or streams have
7865 Changes in version 0.0.2pre16 - 2003-12-14
7867 - Fixed a bug that made HUP trigger an assert
7868 - Fixed a bug where a circuit that immediately failed wasn't being
7869 counted as a failed circuit in counting retries.
7872 - Now we close the circuit when we get a truncated cell: otherwise we're
7873 open to an anonymity attack where a bad node in the path truncates
7874 the circuit and then we open streams at him.
7875 - Add port ranges to exit policies
7876 - Add a conservative default exit policy
7877 - Warn if you're running tor as root
7878 - on HUP, retry OR connections and close/rebind listeners
7879 - options.EntryNodes: try these nodes first when picking the first node
7880 - options.ExitNodes: if your best choices happen to include any of
7881 your preferred exit nodes, you choose among just those preferred
7883 - options.ExcludedNodes: nodes that are never picked in path building
7886 Changes in version 0.0.2pre15 - 2003-12-03
7887 o Robustness and bugfixes:
7888 - Sometimes clients would cache incorrect DNS resolves, which would
7889 really screw things up.
7890 - An OP that goes offline would slowly leak all its sockets and stop
7892 - A wide variety of bugfixes in exit node selection, exit policy
7893 handling, and processing pending streams when a new circuit is
7895 - Pick nodes for a path only from those the directory says are up
7896 - Choose randomly from all running dirservers, not always the first one
7897 - Increase allowed http header size for directory fetch.
7898 - Stop writing to stderr (if we're daemonized it will be closed).
7899 - Enable -g always, so cores will be more useful to me.
7900 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
7903 - Wrote a man page. It lists commonly used options.
7906 - Change default loglevel to warn.
7907 - Make PidFile default to null rather than littering in your CWD.
7908 - OnionRouter config option is now obsolete. Instead it just checks
7910 - Moved to a single unified torrc file for both clients and servers.
7913 Changes in version 0.0.2pre14 - 2003-11-29
7914 o Robustness and bugfixes:
7915 - Force the admin to make the DataDirectory himself
7916 - to get ownership/permissions right
7917 - so clients no longer make a DataDirectory and then never use it
7918 - fix bug where a client who was offline for 45 minutes would never
7919 pull down a directory again
7920 - fix (or at least hide really well) the dns assert bug that was
7921 causing server crashes
7922 - warnings and improved robustness wrt clockskew for certs
7923 - use the native daemon(3) to daemonize, when available
7924 - exit if bind() fails
7925 - exit if neither socksport nor orport is defined
7926 - include our own tor_timegm (Win32 doesn't have its own)
7927 - bugfix for win32 with lots of connections
7928 - fix minor bias in PRNG
7929 - make dirserver more robust to corrupt cached directory
7932 - Wrote the design document (woo)
7934 o Circuit building and exit policies:
7935 - Circuits no longer try to use nodes that the directory has told them
7937 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
7938 bitcounts (18.0.0.0/8).
7939 - Make AP connections standby for a circuit if no suitable circuit
7940 exists, rather than failing
7941 - Circuits choose exit node based on addr/port, exit policies, and
7942 which AP connections are standing by
7943 - Bump min pathlen from 2 to 3
7944 - Relay end cells have a payload to describe why the stream ended.
7945 - If the stream failed because of exit policy, try again with a new
7947 - Clients have a dns cache to remember resolved addresses.
7948 - Notice more quickly when we have no working circuits
7951 - APPort is now called SocksPort
7952 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
7954 - RecommendedVersions is now a config variable rather than
7955 hardcoded (for dirservers)
7956 - Reloads config on HUP
7957 - Usage info on -h or --help
7958 - If you set User and Group config vars, it'll setu/gid to them.
7961 Changes in version 0.0.2pre13 - 2003-10-19
7962 o General stability:
7963 - SSL_write no longer fails when it returns WANTWRITE and the number
7964 of bytes in the buf has changed by the next SSL_write call.
7965 - Fix segfault fetching directory when network is down
7966 - Fix a variety of minor memory leaks
7967 - Dirservers reload the fingerprints file on HUP, so I don't have
7968 to take down the network when I approve a new router
7969 - Default server config file has explicit Address line to specify fqdn
7972 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
7973 - Make listener connections not ever alloc bufs
7975 o Autoconf improvements:
7976 - don't clobber an external CFLAGS in ./configure
7977 - Make install now works
7978 - create var/lib/tor on make install
7979 - autocreate a tor.sh initscript to help distribs
7980 - autocreate the torrc and sample-server-torrc with correct paths
7982 o Log files and Daemonizing now work:
7983 - If --DebugLogFile is specified, log to it at -l debug
7984 - If --LogFile is specified, use it instead of commandline
7985 - If --RunAsDaemon is set, tor forks and backgrounds on startup