1 Changes in version 0.2.1.13-????? - 2009-02-??
3 - Automatically detect MacOSX versions earlier than 10.4.0, and
4 disable kqueue from inside Tor when running with these versions.
5 We previously did this from the startup script, but that was no
6 help to people who didn't use the startup script. Resolves
8 - When we had picked an exit node for a connection, but marked it as
9 "optional", and it turned out we had no onion key for the exit,
10 stop preferring the exit and try again. This situation may not be
11 possible now, but will probably become feasible with proposal 158.
12 Spotted by rovv. Fixes another case of bug 752.
13 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
14 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
15 - As an exit node, scrub the IP address to which we are exiting in the
16 logs. Bugfix on 0.2.1.8-alpha.
17 - Clients no longer cache certificates for authorities they do not
18 recognize. Bugfix on 0.2.0.9-alpha.
19 - When we can't transmit a DNS request due to a network error, retry
20 it after a while, and eventually transmit a failing response to the
21 RESOLVED cell. Bugfix on 0.1.2.5-alpha.
22 - If the controller claimed responsibility for a stream, but that
23 stream never finished making its connection, it would live
24 forever in circuit_wait state. Now we close it after SocksTimeout
25 seconds. Bugfix on 0.1.2.7-alpha; reported by Mike Perry.
28 - On Linux, use the prctl call to re-enable core dumps when the user
30 - Update to the "January 23 2009" ip-to-country file.
33 Changes in version 0.2.0.34 - 2009-02-08
34 Tor 0.2.0.34 features several more security-related fixes. You should
35 upgrade, especially if you run an exit relay (remote crash) or a
36 directory authority (remote infinite loop), or you're on an older
37 (pre-XP) or not-recently-patched Windows (remote exploit).
39 This release marks end-of-life for Tor 0.1.2.x. Those Tor versions
40 have many known flaws, and nobody should be using them. You should
41 upgrade. If you're using a Linux or BSD and its packages are obsolete,
42 stop using those packages and upgrade anyway.
45 - Fix an infinite-loop bug on handling corrupt votes under certain
46 circumstances. Bugfix on 0.2.0.8-alpha.
47 - Fix a temporary DoS vulnerability that could be performed by
48 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
49 - Avoid a potential crash on exit nodes when processing malformed
50 input. Remote DoS opportunity. Bugfix on 0.2.0.33.
51 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
52 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
55 - Fix compilation on systems where time_t is a 64-bit integer.
56 Patch from Matthias Drochner.
57 - Don't consider expiring already-closed client connections. Fixes
58 bug 893. Bugfix on 0.0.2pre20.
61 Changes in version 0.2.1.12-alpha - 2009-02-08
62 Tor 0.2.1.12-alpha features several more security-related fixes. You
63 should upgrade, especially if you run an exit relay (remote crash) or
64 a directory authority (remote infinite loop), or you're on an older
65 (pre-XP) or not-recently-patched Windows (remote exploit). It also
66 includes a big pile of minor bugfixes and cleanups.
69 - Fix an infinite-loop bug on handling corrupt votes under certain
70 circumstances. Bugfix on 0.2.0.8-alpha.
71 - Fix a temporary DoS vulnerability that could be performed by
72 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
73 - Avoid a potential crash on exit nodes when processing malformed
74 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
77 - Let controllers actually ask for the "clients_seen" event for
78 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
79 reported by Matt Edman.
80 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
82 - Fix a bug in address parsing that was preventing bridges or hidden
83 service targets from being at IPv6 addresses.
84 - Solve a bug that kept hardware crypto acceleration from getting
85 enabled when accounting was turned on. Fixes bug 907. Bugfix on
87 - Remove a bash-ism from configure.in to build properly on non-Linux
88 platforms. Bugfix on 0.2.1.1-alpha.
89 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
90 headers. Bugfix on 0.2.0.10-alpha.
91 - Don't consider expiring already-closed client connections. Fixes
92 bug 893. Bugfix on 0.0.2pre20.
93 - Fix another interesting corner-case of bug 891 spotted by rovv:
94 Previously, if two hosts had different amounts of clock drift, and
95 one of them created a new connection with just the wrong timing,
96 the other might decide to deprecate the new connection erroneously.
97 Bugfix on 0.1.1.13-alpha.
98 - Resolve a very rare crash bug that could occur when the user forced
99 a nameserver reconfiguration during the middle of a nameserver
100 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
101 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
102 Bugfix on 0.2.1.7-alpha.
103 - If we're using bridges and our network goes away, be more willing
104 to forgive our bridges and try again when we get an application
105 request. Bugfix on 0.2.0.x.
108 - Support platforms where time_t is 64 bits long. (Congratulations,
109 NetBSD!) Patch from Matthias Drochner.
110 - Add a 'getinfo status/clients-seen' controller command, in case
111 controllers want to hear clients_seen events but connect late.
114 - Disable GCC's strict alias optimization by default, to avoid the
115 likelihood of its introducing subtle bugs whenever our code violates
116 the letter of C99's alias rules.
119 Changes in version 0.2.0.33 - 2009-01-21
120 Tor 0.2.0.33 fixes a variety of bugs that were making relays less
121 useful to users. It also finally fixes a bug where a relay or client
122 that's been off for many days would take a long time to bootstrap.
124 This update also fixes an important security-related bug reported by
125 Ilja van Sprundel. You should upgrade. (We'll send out more details
126 about the bug once people have had some time to upgrade.)
129 - Fix a heap-corruption bug that may be remotely triggerable on
130 some platforms. Reported by Ilja van Sprundel.
133 - When a stream at an exit relay is in state "resolving" or
134 "connecting" and it receives an "end" relay cell, the exit relay
135 would silently ignore the end cell and not close the stream. If
136 the client never closes the circuit, then the exit relay never
137 closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
139 - When sending CREATED cells back for a given circuit, use a 64-bit
140 connection ID to find the right connection, rather than an addr:port
141 combination. Now that we can have multiple OR connections between
142 the same ORs, it is no longer possible to use addr:port to uniquely
143 identify a connection.
144 - Bridge relays that had DirPort set to 0 would stop fetching
145 descriptors shortly after startup, and then briefly resume
146 after a new bandwidth test and/or after publishing a new bridge
147 descriptor. Bridge users that try to bootstrap from them would
148 get a recent networkstatus but would get descriptors from up to
149 18 hours earlier, meaning most of the descriptors were obsolete
150 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
151 - Prevent bridge relays from serving their 'extrainfo' document
152 to anybody who asks, now that extrainfo docs include potentially
153 sensitive aggregated client geoip summaries. Bugfix on
155 - If the cached networkstatus consensus is more than five days old,
156 discard it rather than trying to use it. In theory it could be
157 useful because it lists alternate directory mirrors, but in practice
158 it just means we spend many minutes trying directory mirrors that
159 are long gone from the network. Also discard router descriptors as
160 we load them if they are more than five days old, since the onion
161 key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
164 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
165 could make gcc generate non-functional binary search code. Bugfix
167 - Build correctly on platforms without socklen_t.
168 - Compile without warnings on solaris.
169 - Avoid potential crash on internal error during signature collection.
170 Fixes bug 864. Patch from rovv.
171 - Correct handling of possible malformed authority signing key
172 certificates with internal signature types. Fixes bug 880.
173 Bugfix on 0.2.0.3-alpha.
174 - Fix a hard-to-trigger resource leak when logging credential status.
176 - When we can't initialize DNS because the network is down, do not
177 automatically stop Tor from starting. Instead, we retry failed
178 dns_init() every 10 minutes, and change the exit policy to reject
179 *:* until one succeeds. Fixes bug 691.
180 - Use 64 bits instead of 32 bits for connection identifiers used with
181 the controller protocol, to greatly reduce risk of identifier reuse.
182 - When we're choosing an exit node for a circuit, and we have
183 no pending streams, choose a good general exit rather than one that
184 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
185 - Fix another case of assuming, when a specific exit is requested,
186 that we know more than the user about what hosts it allows.
187 Fixes one case of bug 752. Patch from rovv.
188 - Clip the MaxCircuitDirtiness config option to a minimum of 10
189 seconds. Warn the user if lower values are given in the
190 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
191 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
192 user if lower values are given in the configuration. Bugfix on
193 0.1.1.17-rc. Patch by Sebastian.
194 - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
195 the cache because we already had a v0 descriptor with the same ID.
196 Bugfix on 0.2.0.18-alpha.
197 - Fix a race condition when freeing keys shared between main thread
198 and CPU workers that could result in a memory leak. Bugfix on
199 0.1.0.1-rc. Fixes bug 889.
200 - Send a valid END cell back when a client tries to connect to a
201 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
202 840. Patch from rovv.
203 - Check which hops rendezvous stream cells are associated with to
204 prevent possible guess-the-streamid injection attacks from
205 intermediate hops. Fixes another case of bug 446. Based on patch
207 - If a broken client asks a non-exit router to connect somewhere,
208 do not even do the DNS lookup before rejecting the connection.
209 Fixes another case of bug 619. Patch from rovv.
210 - When a relay gets a create cell it can't decrypt (e.g. because it's
211 using the wrong onion key), we were dropping it and letting the
212 client time out. Now actually answer with a destroy cell. Fixes
213 bug 904. Bugfix on 0.0.2pre8.
215 o Minor bugfixes (hidden services):
216 - Do not throw away existing introduction points on SIGHUP. Bugfix on
217 0.0.6pre1. Patch by Karsten. Fixes bug 874.
220 - Report the case where all signatures in a detached set are rejected
221 differently than the case where there is an error handling the
223 - When we realize that another process has modified our cached
224 descriptors, print out a more useful error message rather than
225 triggering an assertion. Fixes bug 885. Patch from Karsten.
226 - Implement the 0x20 hack to better resist DNS poisoning: set the
227 case on outgoing DNS requests randomly, and reject responses that do
228 not match the case correctly. This logic can be disabled with the
229 ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
230 of servers that do not reliably preserve case in replies. See
231 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
233 - Check DNS replies for more matching fields to better resist DNS
235 - Never use OpenSSL compression: it wastes RAM and CPU trying to
236 compress cells, which are basically all encrypted, compressed, or
240 Changes in version 0.2.1.11-alpha - 2009-01-20
241 Tor 0.2.1.11-alpha finishes fixing the "if your Tor is off for a
242 week it will take a long time to bootstrap again" bug. It also fixes
243 an important security-related bug reported by Ilja van Sprundel. You
244 should upgrade. (We'll send out more details about the bug once people
245 have had some time to upgrade.)
248 - Fix a heap-corruption bug that may be remotely triggerable on
249 some platforms. Reported by Ilja van Sprundel.
252 - Discard router descriptors as we load them if they are more than
253 five days old. Otherwise if Tor is off for a long time and then
254 starts with cached descriptors, it will try to use the onion
255 keys in those obsolete descriptors when building circuits. Bugfix
256 on 0.2.0.x. Fixes bug 887.
259 - Try to make sure that the version of Libevent we're running with
260 is binary-compatible with the one we built with. May address bug
262 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
263 for bug 905. Bugfix on 0.2.1.7-alpha.
264 - Add a new --enable-local-appdata configuration switch to change
265 the default location of the datadir on win32 from APPDATA to
266 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
267 entirely. Patch from coderman.
270 - Make outbound DNS packets respect the OutboundBindAddress setting.
271 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
272 - When our circuit fails at the first hop (e.g. we get a destroy
273 cell back), avoid using that OR connection anymore, and also
274 tell all the one-hop directory requests waiting for it that they
275 should fail. Bugfix on 0.2.1.3-alpha.
276 - In the torify(1) manpage, mention that tsocks will leak your
280 Changes in version 0.2.1.10-alpha - 2009-01-06
282 - If the cached networkstatus consensus is more than five days old,
283 discard it rather than trying to use it. In theory it could
284 be useful because it lists alternate directory mirrors, but in
285 practice it just means we spend many minutes trying directory
286 mirrors that are long gone from the network. Helps bug 887 a bit;
288 - Bridge relays that had DirPort set to 0 would stop fetching
289 descriptors shortly after startup, and then briefly resume
290 after a new bandwidth test and/or after publishing a new bridge
291 descriptor. Bridge users that try to bootstrap from them would
292 get a recent networkstatus but would get descriptors from up to
293 18 hours earlier, meaning most of the descriptors were obsolete
294 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
295 - Prevent bridge relays from serving their 'extrainfo' document
296 to anybody who asks, now that extrainfo docs include potentially
297 sensitive aggregated client geoip summaries. Bugfix on
301 - New controller event "clients_seen" to report a geoip-based summary
302 of which countries we've seen clients from recently. Now controllers
303 like Vidalia can show bridge operators that they're actually making
305 - Build correctly against versions of OpenSSL 0.9.8 or later built
306 without support for deprecated functions.
307 - Update to the "December 19 2008" ip-to-country file.
309 o Minor bugfixes (on 0.2.0.x):
310 - Authorities now vote for the Stable flag for any router whose
311 weighted MTBF is at least 5 days, regardless of the mean MTBF.
312 - Do not remove routers as too old if we do not have any consensus
313 document. Bugfix on 0.2.0.7-alpha.
314 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
315 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
316 - When an exit relay resolves a stream address to a local IP address,
317 do not just keep retrying that same exit relay over and
318 over. Instead, just close the stream. Addresses bug 872. Bugfix
319 on 0.2.0.32. Patch from rovv.
320 - If a hidden service sends us an END cell, do not consider
321 retrying the connection; just close it. Patch from rovv.
322 - When we made bridge authorities stop serving bridge descriptors over
323 unencrypted links, we also broke DirPort reachability testing for
324 bridges. So bridges with a non-zero DirPort were printing spurious
325 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
326 - When a relay gets a create cell it can't decrypt (e.g. because it's
327 using the wrong onion key), we were dropping it and letting the
328 client time out. Now actually answer with a destroy cell. Fixes
329 bug 904. Bugfix on 0.0.2pre8.
330 - Squeeze 2-5% out of client performance (according to oprofile) by
331 improving the implementation of some policy-manipulation functions.
333 o Minor bugfixes (on 0.2.1.x):
334 - Make get_interface_address() function work properly again; stop
335 guessing the wrong parts of our address as our address.
336 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
337 send on that circuit. Otherwise we might violate the proposal-110
338 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
340 - When we're sending non-EXTEND cells to the first hop in a circuit,
341 for example to use an encrypted directory connection, we don't need
342 to use RELAY_EARLY cells: the first hop knows what kind of cell
343 it is, and nobody else can even see the cell type. Conserving
344 RELAY_EARLY cells makes it easier to cannibalize circuits like
346 - Stop logging nameserver addresses in reverse order.
347 - If we are retrying a directory download slowly over and over, do
348 not automatically give up after the 254th failure. Bugfix on
350 - Resume reporting accurate "stream end" reasons to the local control
351 port. They were lost in the changes for Proposal 148. Bugfix on
354 o Deprecated and removed features:
355 - The old "tor --version --version" command, which would print out
356 the subversion "Id" of most of the source files, is now removed. It
357 turned out to be less useful than we'd expected, and harder to
360 o Code simplifications and refactoring:
361 - Change our header file guard macros to be less likely to conflict
362 with system headers. Adam Langley noticed that we were conflicting
363 with log.h on Android.
364 - Tool-assisted documentation cleanup. Nearly every function or
365 static variable in Tor should have its own documentation now.
368 Changes in version 0.2.1.9-alpha - 2008-12-25
369 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
371 o New directory authorities:
372 - gabelmoo (the authority run by Karsten Loesing) now has a new
376 - Never use a connection with a mismatched address to extend a
377 circuit, unless that connection is canonical. A canonical
378 connection is one whose address is authenticated by the router's
379 identity key, either in a NETINFO cell or in a router descriptor.
380 - Avoid a possible memory corruption bug when receiving hidden service
381 descriptors. Bugfix on 0.2.1.6-alpha.
384 - Fix a logic error that would automatically reject all but the first
385 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
386 part of bug 813/868. Bug spotted by coderman.
387 - When a stream at an exit relay is in state "resolving" or
388 "connecting" and it receives an "end" relay cell, the exit relay
389 would silently ignore the end cell and not close the stream. If
390 the client never closes the circuit, then the exit relay never
391 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
393 - When we can't initialize DNS because the network is down, do not
394 automatically stop Tor from starting. Instead, retry failed
395 dns_init() every 10 minutes, and change the exit policy to reject
396 *:* until one succeeds. Fixes bug 691.
399 - Give a better error message when an overzealous init script says
400 "sudo -u username tor --user username". Makes Bug 882 easier for
402 - When a directory authority gives us a new guess for our IP address,
403 log which authority we used. Hopefully this will help us debug
404 the recent complaints about bad IP address guesses.
405 - Detect svn revision properly when we're using git-svn.
406 - Try not to open more than one descriptor-downloading connection
407 to an authority at once. This should reduce load on directory
408 authorities. Fixes bug 366.
409 - Add cross-certification to newly generated certificates, so that
410 a signing key is enough information to look up a certificate.
411 Partial implementation of proposal 157.
412 - Start serving certificates by <identity digest, signing key digest>
413 pairs. Partial implementation of proposal 157.
414 - Clients now never report any stream end reason except 'MISC'.
415 Implements proposal 148.
416 - On platforms with a maximum syslog string length, truncate syslog
417 messages to that length ourselves, rather than relying on the
418 system to do it for us.
419 - Optimize out calls to time(NULL) that occur for every IO operation,
420 or for every cell. On systems where time() is a slow syscall,
421 this fix will be slightly helpful.
422 - Exit servers can now answer resolve requests for ip6.arpa addresses.
423 - When we download a descriptor that we then immediately (as
424 a directory authority) reject, do not retry downloading it right
425 away. Should save some bandwidth on authorities. Fix for bug
426 888. Patch by Sebastian Hahn.
427 - When a download gets us zero good descriptors, do not notify
428 Tor that new directory information has arrived.
429 - Avoid some nasty corner cases in the logic for marking connections
430 as too old or obsolete or noncanonical for circuits. Partial
433 o Minor features (controller):
434 - New CONSENSUS_ARRIVED event to note when a new consensus has
435 been fetched and validated.
436 - When we realize that another process has modified our cached
437 descriptors file, print out a more useful error message rather
438 than triggering an assertion. Fixes bug 885. Patch from Karsten.
439 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
440 controllers to prevent SIGHUP from reloading the
441 configuration. Fixes bug 856.
444 - Resume using the correct "REASON=" stream when telling the
445 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
446 - When a canonical connection appears later in our internal list
447 than a noncanonical one for a given OR ID, always use the
448 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
450 - Clip the MaxCircuitDirtiness config option to a minimum of 10
451 seconds. Warn the user if lower values are given in the
452 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
453 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
454 user if lower values are given in the configuration. Bugfix on
455 0.1.1.17-rc. Patch by Sebastian.
456 - Fix a race condition when freeing keys shared between main thread
457 and CPU workers that could result in a memory leak. Bugfix on
458 0.1.0.1-rc. Fixes bug 889.
460 o Minor bugfixes (hidden services):
461 - Do not throw away existing introduction points on SIGHUP (bugfix on
462 0.0.6pre1); also, do not stall hidden services because we're
463 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
464 by John Brooks. Patch by Karsten. Fixes bug 874.
465 - Fix a memory leak when we decline to add a v2 rendezvous
466 descriptor to the cache because we already had a v0 descriptor
467 with the same ID. Bugfix on 0.2.0.18-alpha.
469 o Deprecated and removed features:
470 - RedirectExits has been removed. It was deprecated since
472 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
473 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
474 - Cell pools are now always enabled; --disable-cell-pools is ignored.
476 o Code simplifications and refactoring:
477 - Rename the confusing or_is_obsolete field to the more appropriate
478 is_bad_for_new_circs, and move it to or_connection_t where it
480 - Move edge-only flags from connection_t to edge_connection_t: not
481 only is this better coding, but on machines of plausible alignment,
482 it should save 4-8 bytes per connection_t. "Every little bit helps."
483 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
484 for consistency; keep old option working for backward compatibility.
485 - Simplify the code for finding connections to use for a circuit.
488 Changes in version 0.2.1.8-alpha - 2008-12-08
489 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
490 builds better on unusual platforms like Solaris and old OS X, and
491 fixes a variety of other issues.
494 - New DirPortFrontPage option that takes an html file and publishes
495 it as "/" on the DirPort. Now relay operators can provide a
496 disclaimer without needing to set up a separate webserver. There's
497 a sample disclaimer in contrib/tor-exit-notice.html.
500 - When the client is choosing entry guards, now it selects at most
501 one guard from a given relay family. Otherwise we could end up with
502 all of our entry points into the network run by the same operator.
503 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
506 - Fix a DOS opportunity during the voting signature collection process
507 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
508 - Fix a possible segfault when establishing an exit connection. Bugfix
512 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
514 - Made Tor a little less aggressive about deleting expired
515 certificates. Partial fix for bug 854.
516 - Stop doing unaligned memory access that generated bus errors on
517 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
518 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
519 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
520 - Make USR2 log-level switch take effect immediately. Bugfix on
522 - If one win32 nameserver fails to get added, continue adding the
523 rest, and don't automatically fail.
524 - Use fcntl() for locking when flock() is not available. Should fix
525 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
526 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
527 could make gcc generate non-functional binary search code. Bugfix
529 - Build correctly on platforms without socklen_t.
530 - Avoid potential crash on internal error during signature collection.
531 Fixes bug 864. Patch from rovv.
532 - Do not use C's stdio library for writing to log files. This will
533 improve logging performance by a minute amount, and will stop
534 leaking fds when our disk is full. Fixes bug 861.
535 - Stop erroneous use of O_APPEND in cases where we did not in fact
536 want to re-seek to the end of a file before every last write().
537 - Correct handling of possible malformed authority signing key
538 certificates with internal signature types. Fixes bug 880. Bugfix
540 - Fix a hard-to-trigger resource leak when logging credential status.
544 - Directory mirrors no longer fetch the v1 directory or
545 running-routers files. They are obsolete, and nobody asks for them
546 anymore. This is the first step to making v1 authorities obsolete.
548 o Minor features (controller):
549 - Return circuit purposes in response to GETINFO circuit-status. Fixes
553 Changes in version 0.2.0.32 - 2008-11-20
554 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
555 packages (and maybe other packages) noticed by Theo de Raadt, fixes
556 a smaller security flaw that might allow an attacker to access local
557 services, further improves hidden service performance, and fixes a
558 variety of other issues.
561 - The "User" and "Group" config options did not clear the
562 supplementary group entries for the Tor process. The "User" option
563 is now more robust, and we now set the groups to the specified
564 user's primary group. The "Group" option is now ignored. For more
565 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
566 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
567 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
568 - The "ClientDNSRejectInternalAddresses" config option wasn't being
569 consistently obeyed: if an exit relay refuses a stream because its
570 exit policy doesn't allow it, we would remember what IP address
571 the relay said the destination address resolves to, even if it's
572 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
575 - Fix a DOS opportunity during the voting signature collection process
576 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
578 o Major bugfixes (hidden services):
579 - When fetching v0 and v2 rendezvous service descriptors in parallel,
580 we were failing the whole hidden service request when the v0
581 descriptor fetch fails, even if the v2 fetch is still pending and
582 might succeed. Similarly, if the last v2 fetch fails, we were
583 failing the whole hidden service request even if a v0 fetch is
584 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
585 - When extending a circuit to a hidden service directory to upload a
586 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
587 requests failed, because the router descriptor has not been
588 downloaded yet. In these cases, do not attempt to upload the
589 rendezvous descriptor, but wait until the router descriptor is
590 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
591 descriptor from a hidden service directory for which the router
592 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
596 - Fix several infrequent memory leaks spotted by Coverity.
597 - When testing for libevent functions, set the LDFLAGS variable
598 correctly. Found by Riastradh.
599 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
600 bootstrapping with tunneled directory connections. Bugfix on
601 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
602 - When asked to connect to A.B.exit:80, if we don't know the IP for A
603 and we know that server B rejects most-but-not all connections to
604 port 80, we would previously reject the connection. Now, we assume
605 the user knows what they were asking for. Fixes bug 752. Bugfix
606 on 0.0.9rc5. Diagnosed by BarkerJr.
607 - If we overrun our per-second write limits a little, count this as
608 having used up our write allocation for the second, and choke
609 outgoing directory writes. Previously, we had only counted this when
610 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
611 Bugfix on 0.2.0.x (??).
612 - Remove the old v2 directory authority 'lefkada' from the default
613 list. It has been gone for many months.
614 - Stop doing unaligned memory access that generated bus errors on
615 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
616 - Make USR2 log-level switch take effect immediately. Bugfix on
619 o Minor bugfixes (controller):
620 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
621 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
624 Changes in version 0.2.1.7-alpha - 2008-11-08
625 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
626 packages (and maybe other packages) noticed by Theo de Raadt, fixes
627 a smaller security flaw that might allow an attacker to access local
628 services, adds better defense against DNS poisoning attacks on exit
629 relays, further improves hidden service performance, and fixes a
630 variety of other issues.
633 - The "ClientDNSRejectInternalAddresses" config option wasn't being
634 consistently obeyed: if an exit relay refuses a stream because its
635 exit policy doesn't allow it, we would remember what IP address
636 the relay said the destination address resolves to, even if it's
637 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
638 - The "User" and "Group" config options did not clear the
639 supplementary group entries for the Tor process. The "User" option
640 is now more robust, and we now set the groups to the specified
641 user's primary group. The "Group" option is now ignored. For more
642 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
643 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
644 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
645 - Do not use or believe expired v3 authority certificates. Patch
646 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
649 - Now NodeFamily and MyFamily config options allow spaces in
650 identity fingerprints, so it's easier to paste them in.
651 Suggested by Lucky Green.
652 - Implement the 0x20 hack to better resist DNS poisoning: set the
653 case on outgoing DNS requests randomly, and reject responses that do
654 not match the case correctly. This logic can be disabled with the
655 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
656 of servers that do not reliably preserve case in replies. See
657 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
659 - Preserve case in replies to DNSPort requests in order to support
660 the 0x20 hack for resisting DNS poisoning attacks.
662 o Hidden service performance improvements:
663 - When the client launches an introduction circuit, retry with a
664 new circuit after 30 seconds rather than 60 seconds.
665 - Launch a second client-side introduction circuit in parallel
666 after a delay of 15 seconds (based on work by Christian Wilms).
667 - Hidden services start out building five intro circuits rather
668 than three, and when the first three finish they publish a service
669 descriptor using those. Now we publish our service descriptor much
670 faster after restart.
673 - Minor fix in the warning messages when you're having problems
674 bootstrapping; also, be more forgiving of bootstrap problems when
675 we're still making incremental progress on a given bootstrap phase.
676 - When we're choosing an exit node for a circuit, and we have
677 no pending streams, choose a good general exit rather than one that
678 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
679 - Send a valid END cell back when a client tries to connect to a
680 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
681 840. Patch from rovv.
682 - If a broken client asks a non-exit router to connect somewhere,
683 do not even do the DNS lookup before rejecting the connection.
684 Fixes another case of bug 619. Patch from rovv.
685 - Fix another case of assuming, when a specific exit is requested,
686 that we know more than the user about what hosts it allows.
687 Fixes another case of bug 752. Patch from rovv.
688 - Check which hops rendezvous stream cells are associated with to
689 prevent possible guess-the-streamid injection attacks from
690 intermediate hops. Fixes another case of bug 446. Based on patch
692 - Avoid using a negative right-shift when comparing 32-bit
693 addresses. Possible fix for bug 845 and bug 811.
694 - Make the assert_circuit_ok() function work correctly on circuits that
695 have already been marked for close.
696 - Fix read-off-the-end-of-string error in unit tests when decoding
698 - Fix uninitialized size field for memory area allocation: may improve
699 memory performance during directory parsing.
700 - Treat duplicate certificate fetches as failures, so that we do
701 not try to re-fetch an expired certificate over and over and over.
702 - Do not say we're fetching a certificate when we'll in fact skip it
703 because of a pending download.
706 Changes in version 0.2.1.6-alpha - 2008-09-30
707 Tor 0.2.1.6-alpha further improves performance and robustness of
708 hidden services, starts work on supporting per-country relay selection,
709 and fixes a variety of smaller issues.
712 - Implement proposal 121: make it possible to build hidden services
713 that only certain clients are allowed to connect to. This is
714 enforced at several points, so that unauthorized clients are unable
715 to send INTRODUCE cells to the service, or even (depending on the
716 type of authentication) to learn introduction points. This feature
717 raises the bar for certain kinds of active attacks against hidden
718 services. Code by Karsten Loesing.
719 - Relays now store and serve v2 hidden service descriptors by default,
720 i.e., the new default value for HidServDirectoryV2 is 1. This is
721 the last step in proposal 114, which aims to make hidden service
722 lookups more reliable.
723 - Start work to allow node restrictions to include country codes. The
724 syntax to exclude nodes in a country with country code XX is
725 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
726 refinement to decide what config options should take priority if
727 you ask to both use a particular node and exclude it.
728 - Allow ExitNodes list to include IP ranges and country codes, just
729 like the Exclude*Nodes lists. Patch from Robert Hogan.
732 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
733 Tor to fail to start if you had it configured to use a bridge
734 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
735 - When extending a circuit to a hidden service directory to upload a
736 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
737 requests failed, because the router descriptor had not been
738 downloaded yet. In these cases, we now wait until the router
739 descriptor is downloaded, and then retry. Likewise, clients
740 now skip over a hidden service directory if they don't yet have
741 its router descriptor, rather than futilely requesting it and
742 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
744 - When fetching v0 and v2 rendezvous service descriptors in parallel,
745 we were failing the whole hidden service request when the v0
746 descriptor fetch fails, even if the v2 fetch is still pending and
747 might succeed. Similarly, if the last v2 fetch fails, we were
748 failing the whole hidden service request even if a v0 fetch is
749 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
750 - DNS replies need to have names matching their requests, but
751 these names should be in the questions section, not necessarily
752 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
755 - Update to the "September 1 2008" ip-to-country file.
756 - Allow ports 465 and 587 in the default exit policy again. We had
757 rejected them in 0.1.0.15, because back in 2005 they were commonly
758 misconfigured and ended up as spam targets. We hear they are better
759 locked down these days.
760 - Use a lockfile to make sure that two Tor processes are not
761 simultaneously running with the same datadir.
762 - Serve the latest v3 networkstatus consensus via the control
763 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
764 - Better logging about stability/reliability calculations on directory
766 - Drop the requirement to have an open dir port for storing and
767 serving v2 hidden service descriptors.
768 - Directory authorities now serve a /tor/dbg-stability.txt URL to
769 help debug WFU and MTBF calculations.
770 - Implement most of Proposal 152: allow specialized servers to permit
771 single-hop circuits, and clients to use those servers to build
772 single-hop circuits when using a specialized controller. Patch
773 from Josh Albrecht. Resolves feature request 768.
774 - Add a -p option to tor-resolve for specifying the SOCKS port: some
775 people find host:port too confusing.
776 - Make TrackHostExit mappings expire a while after their last use, not
777 after their creation. Patch from Robert Hogan.
778 - Provide circuit purposes along with circuit events to the controller.
781 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
783 - Fixed some memory leaks -- some quite frequent, some almost
784 impossible to trigger -- based on results from Coverity.
785 - When testing for libevent functions, set the LDFLAGS variable
786 correctly. Found by Riastradh.
787 - Fix an assertion bug in parsing policy-related options; possible fix
789 - Catch and report a few more bootstrapping failure cases when Tor
790 fails to establish a TCP connection. Cleanup on 0.2.1.x.
791 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
792 bootstrapping with tunneled directory connections. Bugfix on
793 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
794 - When asked to connect to A.B.exit:80, if we don't know the IP for A
795 and we know that server B rejects most-but-not all connections to
796 port 80, we would previously reject the connection. Now, we assume
797 the user knows what they were asking for. Fixes bug 752. Bugfix
798 on 0.0.9rc5. Diagnosed by BarkerJr.
799 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
800 service directories if they have no advertised dir port. Bugfix
802 - If we overrun our per-second write limits a little, count this as
803 having used up our write allocation for the second, and choke
804 outgoing directory writes. Previously, we had only counted this when
805 we had met our limits precisely. Fixes bug 824. Patch by rovv.
806 Bugfix on 0.2.0.x (??).
807 - Avoid a "0 divided by 0" calculation when calculating router uptime
808 at directory authorities. Bugfix on 0.2.0.8-alpha.
809 - Make DNS resolved controller events into "CLOSED", not
810 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
812 - Fix a bug where an unreachable relay would establish enough
813 reachability testing circuits to do a bandwidth test -- if
814 we already have a connection to the middle hop of the testing
815 circuit, then it could establish the last hop by using the existing
816 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
817 circuits no longer use entry guards in 0.2.1.3-alpha.
818 - If we have correct permissions on $datadir, we complain to stdout
819 and fail to start. But dangerous permissions on
820 $datadir/cached-status/ would cause us to open a log and complain
821 there. Now complain to stdout and fail to start in both cases. Fixes
822 bug 820, reported by seeess.
823 - Remove the old v2 directory authority 'lefkada' from the default
824 list. It has been gone for many months.
826 o Code simplifications and refactoring:
827 - Revise the connection_new functions so that a more typesafe variant
828 exists. This will work better with Coverity, and let us find any
829 actual mistakes we're making here.
830 - Refactor unit testing logic so that dmalloc can be used sensibly
831 with unit tests to check for memory leaks.
832 - Move all hidden-service related fields from connection and circuit
833 structure to substructures: this way they won't eat so much memory.
836 Changes in version 0.2.0.31 - 2008-09-03
837 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
838 a big bug we're seeing where in rare cases traffic from one Tor stream
839 gets mixed into another stream, and fixes a variety of smaller issues.
842 - Make sure that two circuits can never exist on the same connection
843 with the same circuit ID, even if one is marked for close. This
844 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
845 - Relays now reject risky extend cells: if the extend cell includes
846 a digest of all zeroes, or asks to extend back to the relay that
847 sent the extend cell, tear down the circuit. Ideas suggested
849 - If not enough of our entry guards are available so we add a new
850 one, we might use the new one even if it overlapped with the
851 current circuit's exit relay (or its family). Anonymity bugfix
855 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
856 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
857 - Correctly detect the presence of the linux/netfilter_ipv4.h header
858 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
859 - Pick size of default geoip filename string correctly on windows.
860 Fixes bug 806. Bugfix on 0.2.0.30.
861 - Make the autoconf script accept the obsolete --with-ssl-dir
862 option as an alias for the actually-working --with-openssl-dir
863 option. Fix the help documentation to recommend --with-openssl-dir.
864 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
865 - Disallow session resumption attempts during the renegotiation
866 stage of the v2 handshake protocol. Clients should never be trying
867 session resumption at this point, but apparently some did, in
868 ways that caused the handshake to fail. Bug found by Geoff Goodell.
869 Bugfix on 0.2.0.20-rc.
870 - When using the TransPort option on OpenBSD, and using the User
871 option to change UID and drop privileges, make sure to open
872 /dev/pf before dropping privileges. Fixes bug 782. Patch from
873 Christopher Davis. Bugfix on 0.1.2.1-alpha.
874 - Try to attach connections immediately upon receiving a RENDEZVOUS2
875 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
876 on the client side when connecting to a hidden service. Bugfix
877 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
878 - When closing an application-side connection because its circuit is
879 getting torn down, generate the stream event correctly. Bugfix on
880 0.1.2.x. Anonymous patch.
883 Changes in version 0.2.1.5-alpha - 2008-08-31
884 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
885 in a lot of the infrastructure for adding authorization to hidden
886 services, lays the groundwork for having clients read their load
887 balancing information out of the networkstatus consensus rather than
888 the individual router descriptors, addresses two potential anonymity
889 issues, and fixes a variety of smaller issues.
892 - Convert many internal address representations to optionally hold
894 - Generate and accept IPv6 addresses in many protocol elements.
895 - Make resolver code handle nameservers located at ipv6 addresses.
896 - Begin implementation of proposal 121 ("Client authorization for
897 hidden services"): configure hidden services with client
898 authorization, publish descriptors for them, and configure
899 authorization data for hidden services at clients. The next
900 step is to actually access hidden services that perform client
902 - More progress toward proposal 141: Network status consensus
903 documents and votes now contain bandwidth information for each
904 router and a summary of that router's exit policy. Eventually this
905 will be used by clients so that they do not have to download every
906 known descriptor before building circuits.
908 o Major bugfixes (on 0.2.0.x and before):
909 - When sending CREATED cells back for a given circuit, use a 64-bit
910 connection ID to find the right connection, rather than an addr:port
911 combination. Now that we can have multiple OR connections between
912 the same ORs, it is no longer possible to use addr:port to uniquely
913 identify a connection.
914 - Relays now reject risky extend cells: if the extend cell includes
915 a digest of all zeroes, or asks to extend back to the relay that
916 sent the extend cell, tear down the circuit. Ideas suggested
918 - If not enough of our entry guards are available so we add a new
919 one, we might use the new one even if it overlapped with the
920 current circuit's exit relay (or its family). Anonymity bugfix
924 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
925 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
926 - When using the TransPort option on OpenBSD, and using the User
927 option to change UID and drop privileges, make sure to open /dev/pf
928 before dropping privileges. Fixes bug 782. Patch from Christopher
929 Davis. Bugfix on 0.1.2.1-alpha.
930 - Correctly detect the presence of the linux/netfilter_ipv4.h header
931 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
932 - Add a missing safe_str() call for a debug log message.
933 - Use 64 bits instead of 32 bits for connection identifiers used with
934 the controller protocol, to greatly reduce risk of identifier reuse.
935 - Make the autoconf script accept the obsolete --with-ssl-dir
936 option as an alias for the actually-working --with-openssl-dir
937 option. Fix the help documentation to recommend --with-openssl-dir.
938 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
941 - Rate-limit too-many-sockets messages: when they happen, they happen
942 a lot. Resolves bug 748.
943 - Resist DNS poisoning a little better by making sure that names in
944 answer sections match.
945 - Print the SOCKS5 error message string as well as the error code
946 when a tor-resolve request fails. Patch from Jacob.
949 Changes in version 0.2.1.4-alpha - 2008-08-04
950 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
953 - The address part of exit policies was not correctly written
954 to router descriptors. This generated router descriptors that failed
955 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
957 - Tor triggered a false assert when extending a circuit to a relay
958 but we already have a connection open to that relay. Noticed by
959 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
962 - Fix a hidden service logging bug: in some edge cases, the router
963 descriptor of a previously picked introduction point becomes
964 obsolete and we need to give up on it rather than continually
965 complaining that it has become obsolete. Observed by xiando. Bugfix
969 - Take out the TestVia config option, since it was a workaround for
970 a bug that was fixed in Tor 0.1.1.21.
973 Changes in version 0.2.1.3-alpha - 2008-08-03
974 Tor 0.2.1.3-alpha implements most of the pieces to prevent
975 infinite-length circuit attacks (see proposal 110); fixes a bug that
976 might cause exit relays to corrupt streams they send back; allows
977 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
978 ExcludeExitNodes config options; and fixes a big pile of bugs.
980 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
981 - Send a bootstrap problem "warn" event on the first problem if the
982 reason is NO_ROUTE (that is, our network is down).
985 - Implement most of proposal 110: The first K cells to be sent
986 along a circuit are marked as special "early" cells; only K "early"
987 cells will be allowed. Once this code is universal, we can block
988 certain kinds of DOS attack by requiring that EXTEND commands must
989 be sent using an "early" cell.
992 - Try to attach connections immediately upon receiving a RENDEZVOUS2
993 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
994 on the client side when connecting to a hidden service. Bugfix
995 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
996 - Ensure that two circuits can never exist on the same connection
997 with the same circuit ID, even if one is marked for close. This
998 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
1001 - When relays do their initial bandwidth measurement, don't limit
1002 to just our entry guards for the test circuits. Otherwise we tend
1003 to have multiple test circuits going through a single entry guard,
1004 which makes our bandwidth test less accurate. Fixes part of bug 654;
1005 patch contributed by Josh Albrecht.
1006 - Add an ExcludeExitNodes option so users can list a set of nodes
1007 that should be be excluded from the exit node position, but
1008 allowed elsewhere. Implements proposal 151.
1009 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
1010 ExcludeNodes and ExcludeExitNodes lists.
1011 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
1012 be more efficient. Formerly it was quadratic in the number of
1013 servers; now it should be linear. Fixes bug 509.
1014 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
1015 and n_conn_id_digest fields into a separate structure that's
1016 only needed when the circuit has not yet attached to an n_conn.
1019 - Change the contrib/tor.logrotate script so it makes the new
1020 logs as "_tor:_tor" rather than the default, which is generally
1021 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
1022 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1023 warnings (occasionally), but it can also cause the compiler to
1024 eliminate error-checking code. Suggested by Peter Gutmann.
1025 - When a hidden service is giving up on an introduction point candidate
1026 that was not included in the last published rendezvous descriptor,
1027 don't reschedule publication of the next descriptor. Fixes bug 763.
1029 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
1030 HiddenServiceExcludeNodes as obsolete: they never worked properly,
1031 and nobody claims to be using them. Fixes bug 754. Bugfix on
1032 0.1.0.1-rc. Patch from Christian Wilms.
1033 - Fix a small alignment and memory-wasting bug on buffer chunks.
1036 o Minor bugfixes (controller):
1037 - When closing an application-side connection because its circuit
1038 is getting torn down, generate the stream event correctly.
1039 Bugfix on 0.1.2.x. Anonymous patch.
1042 - Remove all backward-compatibility code to support relays running
1043 versions of Tor so old that they no longer work at all on the
1047 Changes in version 0.2.0.30 - 2008-07-15
1049 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
1050 warnings (occasionally), but it can also cause the compiler to
1051 eliminate error-checking code. Suggested by Peter Gutmann.
1054 Changes in version 0.2.0.29-rc - 2008-07-08
1055 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
1056 hidden-service performance bugs, and fixes a bunch of smaller bugs.
1059 - If you have more than one bridge but don't know their keys,
1060 you would only launch a request for the descriptor of the first one
1061 on your list. (Tor considered launching requests for the others, but
1062 found that it already had a connection on the way for $0000...0000
1063 so it didn't open another.) Bugfix on 0.2.0.x.
1064 - If you have more than one bridge but don't know their keys, and the
1065 connection to one of the bridges failed, you would cancel all
1066 pending bridge connections. (After all, they all have the same
1067 digest.) Bugfix on 0.2.0.x.
1068 - When a hidden service was trying to establish an introduction point,
1069 and Tor had built circuits preemptively for such purposes, we
1070 were ignoring all the preemptive circuits and launching a new one
1071 instead. Bugfix on 0.2.0.14-alpha.
1072 - When a hidden service was trying to establish an introduction point,
1073 and Tor *did* manage to reuse one of the preemptively built
1074 circuits, it didn't correctly remember which one it used,
1075 so it asked for another one soon after, until there were no
1076 more preemptive circuits, at which point it launched one from
1077 scratch. Bugfix on 0.0.9.x.
1078 - Make directory servers include the X-Your-Address-Is: http header in
1079 their responses even for begin_dir conns. Now clients who only
1080 ever use begin_dir connections still have a way to learn their IP
1081 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
1084 - Fix a macro/CPP interaction that was confusing some compilers:
1085 some GCCs don't like #if/#endif pairs inside macro arguments.
1087 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
1088 Fixes bug 704; fix from Steven Murdoch.
1089 - When opening /dev/null in finish_daemonize(), do not pass the
1090 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
1091 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
1092 - Correctly detect transparent proxy support on Linux hosts that
1093 require in.h to be included before netfilter_ipv4.h. Patch
1095 - Disallow session resumption attempts during the renegotiation
1096 stage of the v2 handshake protocol. Clients should never be trying
1097 session resumption at this point, but apparently some did, in
1098 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
1099 found by Geoff Goodell.
1102 Changes in version 0.2.1.2-alpha - 2008-06-20
1103 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
1104 make it easier to set up your own private Tor network; fixes several
1105 big bugs with using more than one bridge relay; fixes a big bug with
1106 offering hidden services quickly after Tor starts; and uses a better
1107 API for reporting potential bootstrapping problems to the controller.
1110 - New TestingTorNetwork config option to allow adjustment of
1111 previously constant values that, while reasonable, could slow
1112 bootstrapping. Implements proposal 135. Patch from Karsten.
1115 - If you have more than one bridge but don't know their digests,
1116 you would only learn a request for the descriptor of the first one
1117 on your list. (Tor considered launching requests for the others, but
1118 found that it already had a connection on the way for $0000...0000
1119 so it didn't open another.) Bugfix on 0.2.0.x.
1120 - If you have more than one bridge but don't know their digests,
1121 and the connection to one of the bridges failed, you would cancel
1122 all pending bridge connections. (After all, they all have the
1123 same digest.) Bugfix on 0.2.0.x.
1124 - When establishing a hidden service, introduction points that
1125 originate from cannibalized circuits are completely ignored and not
1126 included in rendezvous service descriptors. This might be another
1127 reason for delay in making a hidden service available. Bugfix
1128 from long ago (0.0.9.x?)
1131 - Allow OpenSSL to use dynamic locks if it wants.
1132 - When building a consensus, do not include routers that are down.
1133 This will cut down 30% to 40% on consensus size. Implements
1135 - In directory authorities' approved-routers files, allow
1136 fingerprints with or without space.
1137 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
1138 controller can query our current bootstrap state in case it attaches
1139 partway through and wants to catch up.
1140 - Send an initial "Starting" bootstrap status event, so we have a
1141 state to start out in.
1144 - Asking for a conditional consensus at .../consensus/<fingerprints>
1145 would crash a dirserver if it did not already have a
1146 consensus. Bugfix on 0.2.1.1-alpha.
1147 - Clean up some macro/CPP interactions: some GCC versions don't like
1148 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
1151 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
1152 - Directory authorities shouldn't complain about bootstrapping
1153 problems just because they do a lot of reachability testing and
1154 some of the connection attempts fail.
1155 - Start sending "count" and "recommendation" key/value pairs in
1156 bootstrap problem status events, so the controller can hear about
1157 problems even before Tor decides they're worth reporting for sure.
1158 - If you're using bridges, generate "bootstrap problem" warnings
1159 as soon as you run out of working bridges, rather than waiting
1160 for ten failures -- which will never happen if you have less than
1162 - If we close our OR connection because there's been a circuit
1163 pending on it for too long, we were telling our bootstrap status
1164 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
1167 Changes in version 0.2.1.1-alpha - 2008-06-13
1168 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
1169 were making the Tor process bloat especially on Linux; makes our TLS
1170 handshake blend in better; sends "bootstrap phase" status events to
1171 the controller, so it can keep the user informed of progress (and
1172 problems) fetching directory information and establishing circuits;
1173 and adds a variety of smaller features.
1176 - More work on making our TLS handshake blend in: modify the list
1177 of ciphers advertised by OpenSSL in client mode to even more
1178 closely resemble a common web browser. We cheat a little so that
1179 we can advertise ciphers that the locally installed OpenSSL doesn't
1181 - Start sending "bootstrap phase" status events to the controller,
1182 so it can keep the user informed of progress fetching directory
1183 information and establishing circuits. Also inform the controller
1184 if we think we're stuck at a particular bootstrap phase. Implements
1186 - Resume using OpenSSL's RAND_poll() for better (and more portable)
1187 cross-platform entropy collection again. We used to use it, then
1188 stopped using it because of a bug that could crash systems that
1189 called RAND_poll when they had a lot of fds open. It looks like the
1190 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
1191 at startup, and to call RAND_poll() when we reseed later only if
1192 we have a non-buggy OpenSSL version.
1195 - When we choose to abandon a new entry guard because we think our
1196 older ones might be better, close any circuits pending on that
1197 new entry guard connection. This fix should make us recover much
1198 faster when our network is down and then comes back. Bugfix on
1199 0.1.2.8-beta; found by lodger.
1201 o Memory fixes and improvements:
1202 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
1203 to avoid unused RAM in buffer chunks and memory pools.
1204 - Speed up parsing and cut down on memory fragmentation by using
1205 stack-style allocations for parsing directory objects. Previously,
1206 this accounted for over 40% of allocations from within Tor's code
1207 on a typical directory cache.
1208 - Use a Bloom filter rather than a digest-based set to track which
1209 descriptors we need to keep around when we're cleaning out old
1210 router descriptors. This speeds up the computation significantly,
1211 and may reduce fragmentation.
1212 - Reduce the default smartlist size from 32 to 16; it turns out that
1213 most smartlists hold around 8-12 elements tops.
1214 - Make dumpstats() log the fullness and size of openssl-internal
1216 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
1217 patch to their OpenSSL, turn it on to save memory on servers. This
1218 patch will (with any luck) get included in a mainline distribution
1220 - Never use OpenSSL compression: it wastes RAM and CPU trying to
1221 compress cells, which are basically all encrypted, compressed,
1225 - Stop reloading the router list from disk for no reason when we
1226 run out of reachable directory mirrors. Once upon a time reloading
1227 it would set the 'is_running' flag back to 1 for them. It hasn't
1228 done that for a long time.
1229 - In very rare situations new hidden service descriptors were
1230 published earlier than 30 seconds after the last change to the
1231 service. (We currently think that a hidden service descriptor
1232 that's been stable for 30 seconds is worth publishing.)
1235 - Allow separate log levels to be configured for different logging
1236 domains. For example, this allows one to log all notices, warnings,
1237 or errors, plus all memory management messages of level debug or
1238 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
1239 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
1240 and stop using a warning that had become unfixably verbose under
1242 - New --hush command-line option similar to --quiet. While --quiet
1243 disables all logging to the console on startup, --hush limits the
1244 output to messages of warning and error severity.
1245 - Servers support a new URL scheme for consensus downloads that
1246 allows the client to specify which authorities are trusted.
1247 The server then only sends the consensus if the client will trust
1248 it. Otherwise a 404 error is sent back. Clients use this
1249 new scheme when the server supports it (meaning it's running
1250 0.2.1.1-alpha or later). Implements proposal 134.
1251 - New configure/torrc options (--enable-geoip-stats,
1252 DirRecordUsageByCountry) to record how many IPs we've served
1253 directory info to in each country code, how many status documents
1254 total we've sent to each country code, and what share of the total
1255 directory requests we should expect to see.
1256 - Use the TLS1 hostname extension to more closely resemble browser
1258 - Lots of new unit tests.
1259 - Add a macro to implement the common pattern of iterating through
1260 two parallel lists in lockstep.
1263 Changes in version 0.2.0.28-rc - 2008-06-13
1264 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
1265 performance bug, and fixes a bunch of smaller bugs.
1268 - Fix a bug where, when we were choosing the 'end stream reason' to
1269 put in our relay end cell that we send to the exit relay, Tor
1270 clients on Windows were sometimes sending the wrong 'reason'. The
1271 anonymity problem is that exit relays may be able to guess whether
1272 the client is running Windows, thus helping partition the anonymity
1273 set. Down the road we should stop sending reasons to exit relays,
1274 or otherwise prevent future versions of this bug.
1277 - While setting up a hidden service, some valid introduction circuits
1278 were overlooked and abandoned. This might be the reason for
1279 the long delay in making a hidden service available. Bugfix on
1283 - Update to the "June 9 2008" ip-to-country file.
1284 - Run 'make test' as part of 'make dist', so we stop releasing so
1285 many development snapshots that fail their unit tests.
1288 - When we're checking if we have enough dir info for each relay
1289 to begin establishing circuits, make sure that we actually have
1290 the descriptor listed in the consensus, not just any descriptor.
1292 - Bridge relays no longer print "xx=0" in their extrainfo document
1293 for every single country code in the geoip db. Bugfix on
1295 - Only warn when we fail to load the geoip file if we were planning to
1296 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
1297 - If we change our MaxAdvertisedBandwidth and then reload torrc,
1298 Tor won't realize it should publish a new relay descriptor. Fixes
1299 bug 688, reported by mfr. Bugfix on 0.1.2.x.
1300 - When we haven't had any application requests lately, don't bother
1301 logging that we have expired a bunch of descriptors. Bugfix
1303 - Make relay cells written on a connection count as non-padding when
1304 tracking how long a connection has been in use. Bugfix on
1305 0.2.0.1-alpha. Spotted by lodger.
1306 - Fix unit tests in 0.2.0.27-rc.
1307 - Fix compile on Windows.
1310 Changes in version 0.2.0.27-rc - 2008-06-03
1311 Tor 0.2.0.27-rc adds a few features we left out of the earlier
1312 release candidates. In particular, we now include an IP-to-country
1313 GeoIP database, so controllers can easily look up what country a
1314 given relay is in, and so bridge relays can give us some sanitized
1315 summaries about which countries are making use of bridges. (See proposal
1316 126-geoip-fetching.txt for details.)
1319 - Include an IP-to-country GeoIP file in the tarball, so bridge
1320 relays can report sanitized summaries of the usage they're seeing.
1323 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
1324 Robert Hogan. Fixes the first part of bug 681.
1325 - Make bridge authorities never serve extrainfo docs.
1326 - Add support to detect Libevent versions in the 1.4.x series
1328 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
1329 - Include a new contrib/tor-exit-notice.html file that exit relay
1330 operators can put on their website to help reduce abuse queries.
1333 - When tunneling an encrypted directory connection, and its first
1334 circuit fails, do not leave it unattached and ask the controller
1335 to deal. Fixes the second part of bug 681.
1336 - Make bridge authorities correctly expire old extrainfo documents
1340 Changes in version 0.2.0.26-rc - 2008-05-13
1341 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
1342 in Debian's OpenSSL packages. All users running any 0.2.0.x version
1343 should upgrade, whether they're running Debian or not.
1345 o Major security fixes:
1346 - Use new V3 directory authority keys on the tor26, gabelmoo, and
1347 moria1 V3 directory authorities. The old keys were generated with
1348 a vulnerable version of Debian's OpenSSL package, and must be
1349 considered compromised. Other authorities' keys were not generated
1350 with an affected version of OpenSSL.
1353 - List authority signatures as "unrecognized" based on DirServer
1354 lines, not on cert cache. Bugfix on 0.2.0.x.
1357 - Add a new V3AuthUseLegacyKey option to make it easier for
1358 authorities to change their identity keys if they have to.
1361 Changes in version 0.2.0.25-rc - 2008-04-23
1362 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
1365 - Remember to initialize threading before initializing logging.
1366 Otherwise, many BSD-family implementations will crash hard on
1367 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
1370 - Authorities correctly free policies on bad servers on
1371 exit. Fixes bug 672. Bugfix on 0.2.0.x.
1374 Changes in version 0.2.0.24-rc - 2008-04-22
1375 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
1376 v3 directory authority, makes relays with dynamic IP addresses and no
1377 DirPort notice more quickly when their IP address changes, fixes a few
1378 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
1380 o New directory authorities:
1381 - Take lefkada out of the list of v3 directory authorities, since
1382 it has been down for months.
1383 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
1387 - Detect address changes more quickly on non-directory mirror
1388 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
1390 o Minor features (security):
1391 - Reject requests for reverse-dns lookup of names that are in
1392 a private address space. Patch from lodger.
1393 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
1396 o Minor bugfixes (crashes):
1397 - Avoid a rare assert that can trigger when Tor doesn't have much
1398 directory information yet and it tries to fetch a v2 hidden
1399 service descriptor. Fixes bug 651, reported by nwf.
1400 - Initialize log mutex before initializing dmalloc. Otherwise,
1401 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
1402 - Use recursive pthread mutexes in order to avoid deadlock when
1403 logging debug-level messages to a controller. Bug spotted by nwf,
1404 bugfix on 0.2.0.16-alpha.
1406 o Minor bugfixes (resource management):
1407 - Keep address policies from leaking memory: start their refcount
1408 at 1, not 2. Bugfix on 0.2.0.16-alpha.
1409 - Free authority certificates on exit, so they don't look like memory
1410 leaks. Bugfix on 0.2.0.19-alpha.
1411 - Free static hashtables for policy maps and for TLS connections on
1412 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
1413 - Avoid allocating extra space when computing consensuses on 64-bit
1414 platforms. Bug spotted by aakova.
1416 o Minor bugfixes (misc):
1417 - Do not read the configuration file when we've only been told to
1418 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
1419 based on patch from Sebastian Hahn.
1420 - Exit relays that are used as a client can now reach themselves
1421 using the .exit notation, rather than just launching an infinite
1422 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
1423 - When attempting to open a logfile fails, tell us why.
1424 - Fix a dumb bug that was preventing us from knowing that we should
1425 preemptively build circuits to handle expected directory requests.
1426 Fixes bug 660. Bugfix on 0.1.2.x.
1427 - Warn less verbosely about clock skew from netinfo cells from
1428 untrusted sources. Fixes bug 663.
1429 - Make controller stream events for DNS requests more consistent,
1430 by adding "new stream" events for DNS requests, and removing
1431 spurious "stream closed" events" for cached reverse resolves.
1432 Patch from mwenge. Fixes bug 646.
1433 - Correctly notify one-hop connections when a circuit build has
1434 failed. Possible fix for bug 669. Found by lodger.
1437 Changes in version 0.2.0.23-rc - 2008-03-24
1438 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
1439 makes bootstrapping faster if the first directory mirror you contact
1440 is down. The bundles also include the new Vidalia 0.1.2 release.
1443 - When a tunneled directory request is made to a directory server
1444 that's down, notice after 30 seconds rather than 120 seconds. Also,
1445 fail any begindir streams that are pending on it, so they can
1446 retry elsewhere. This was causing multi-minute delays on bootstrap.
1449 Changes in version 0.2.0.22-rc - 2008-03-18
1450 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
1451 enables encrypted directory connections by default for non-relays, fixes
1452 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
1453 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
1456 - Enable encrypted directory connections by default for non-relays,
1457 so censor tools that block Tor directory connections based on their
1458 plaintext patterns will no longer work. This means Tor works in
1459 certain censored countries by default again.
1462 - Make sure servers always request certificates from clients during
1463 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
1464 - Do not enter a CPU-eating loop when a connection is closed in
1465 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
1466 diagnosed by lodger; bugfix on 0.2.0.20-rc.
1467 - Fix assertion failure that could occur when a blocked circuit
1468 became unblocked, and it had pending client DNS requests. Bugfix
1469 on 0.2.0.1-alpha. Fixes bug 632.
1471 o Minor bugfixes (on 0.1.2.x):
1472 - Generate "STATUS_SERVER" events rather than misspelled
1473 "STATUS_SEVER" events. Caught by mwenge.
1474 - When counting the number of bytes written on a TLS connection,
1475 look at the BIO actually used for writing to the network, not
1476 at the BIO used (sometimes) to buffer data for the network.
1477 Looking at different BIOs could result in write counts on the
1478 order of ULONG_MAX. Fixes bug 614.
1479 - On Windows, correctly detect errors when listing the contents of
1480 a directory. Fix from lodger.
1482 o Minor bugfixes (on 0.2.0.x):
1483 - Downgrade "sslv3 alert handshake failure" message to INFO.
1484 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
1485 left BandwidthRate and BandwidthBurst at the default, we would be
1486 silently limited by those defaults. Now raise them to match the
1487 RelayBandwidth* values.
1488 - Fix the SVK version detection logic to work correctly on a branch.
1489 - Make --enable-openbsd-malloc work correctly on Linux with alpha
1490 CPUs. Fixes bug 625.
1491 - Logging functions now check that the passed severity is sane.
1492 - Use proper log levels in the testsuite call of
1493 get_interface_address6().
1494 - When using a nonstandard malloc, do not use the platform values for
1495 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
1496 - Make the openbsd malloc code use 8k pages on alpha CPUs and
1498 - Detect mismatched page sizes when using --enable-openbsd-malloc.
1499 - Avoid double-marked-for-close warning when certain kinds of invalid
1500 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
1501 for bug 617. Bugfix on 0.2.0.1-alpha.
1502 - Make sure that the "NULL-means-reject *:*" convention is followed by
1503 all the policy manipulation functions, avoiding some possible crash
1504 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
1505 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
1506 actually works, and doesn't warn about every single reverse lookup.
1507 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
1510 - Only log guard node status when guard node status has changed.
1511 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
1512 make "INFO" 75% less verbose.
1515 Changes in version 0.2.0.21-rc - 2008-03-02
1516 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
1517 makes Tor work well with Vidalia again, fixes a rare assert bug,
1518 and fixes a pair of more minor bugs. The bundles also include Vidalia
1519 0.1.0 and Torbutton 1.1.16.
1522 - The control port should declare that it requires password auth
1523 when HashedControlSessionPassword is set too. Patch from Matt Edman;
1524 bugfix on 0.2.0.20-rc. Fixes bug 615.
1525 - Downgrade assert in connection_buckets_decrement() to a log message.
1526 This may help us solve bug 614, and in any case will make its
1527 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
1528 - We were sometimes miscounting the number of bytes read from the
1529 network, causing our rate limiting to not be followed exactly.
1530 Bugfix on 0.2.0.16-alpha. Reported by lodger.
1533 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
1534 OpenSSL versions should have been working fine. Diagnosis and patch
1535 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
1536 Bugfix on 0.2.0.20-rc.
1539 Changes in version 0.2.0.20-rc - 2008-02-24
1540 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
1541 makes more progress towards normalizing Tor's TLS handshake, makes
1542 hidden services work better again, helps relays bootstrap if they don't
1543 know their IP address, adds optional support for linking in openbsd's
1544 allocator or tcmalloc, allows really fast relays to scale past 15000
1545 sockets, and fixes a bunch of minor bugs reported by Veracode.
1548 - Enable the revised TLS handshake based on the one designed by
1549 Steven Murdoch in proposal 124, as revised in proposal 130. It
1550 includes version negotiation for OR connections as described in
1551 proposal 105. The new handshake is meant to be harder for censors
1552 to fingerprint, and it adds the ability to detect certain kinds of
1553 man-in-the-middle traffic analysis attacks. The version negotiation
1554 feature will allow us to improve Tor's link protocol more safely
1556 - Choose which bridge to use proportional to its advertised bandwidth,
1557 rather than uniformly at random. This should speed up Tor for
1558 bridge users. Also do this for people who set StrictEntryNodes.
1559 - When a TrackHostExits-chosen exit fails too many times in a row,
1560 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
1563 - Resolved problems with (re-)fetching hidden service descriptors.
1564 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
1566 - If we only ever used Tor for hidden service lookups or posts, we
1567 would stop building circuits and start refusing connections after
1568 24 hours, since we falsely believed that Tor was dormant. Reported
1569 by nwf; bugfix on 0.1.2.x.
1570 - Servers that don't know their own IP address should go to the
1571 authorities for their first directory fetch, even if their DirPort
1572 is off or if they don't know they're reachable yet. This will help
1573 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
1574 - When counting the number of open sockets, count not only the number
1575 of sockets we have received from the socket() call, but also
1576 the number we've gotten from accept() and socketpair(). This bug
1577 made us fail to count all sockets that we were using for incoming
1578 connections. Bugfix on 0.2.0.x.
1579 - Fix code used to find strings within buffers, when those strings
1580 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
1581 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
1582 - Add a new __HashedControlSessionPassword option for controllers
1583 to use for one-off session password hashes that shouldn't get
1584 saved to disk by SAVECONF --- Vidalia users were accumulating a
1585 pile of HashedControlPassword lines in their torrc files, one for
1586 each time they had restarted Tor and then clicked Save. Make Tor
1587 automatically convert "HashedControlPassword" to this new option but
1588 only when it's given on the command line. Partial fix for bug 586.
1590 o Minor features (performance):
1591 - Tune parameters for cell pool allocation to minimize amount of
1593 - Add OpenBSD malloc code from phk as an optional malloc
1594 replacement on Linux: some glibc libraries do very poorly
1595 with Tor's memory allocation patterns. Pass
1596 --enable-openbsd-malloc to get the replacement malloc code.
1597 - Add a --with-tcmalloc option to the configure script to link
1598 against tcmalloc (if present). Does not yet search for
1599 non-system include paths.
1600 - Stop imposing an arbitrary maximum on the number of file descriptors
1601 used for busy servers. Bug reported by Olaf Selke; patch from
1604 o Minor features (other):
1605 - When SafeLogging is disabled, log addresses along with all TLS
1607 - When building with --enable-gcc-warnings, check for whether Apple's
1608 warning "-Wshorten-64-to-32" is available.
1609 - Add a --passphrase-fd argument to the tor-gencert command for
1612 o Minor bugfixes (memory leaks and code problems):
1613 - We were leaking a file descriptor if Tor started with a zero-length
1614 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
1615 - Detect size overflow in zlib code. Reported by Justin Ferguson and
1617 - We were comparing the raw BridgePassword entry with a base64'ed
1618 version of it, when handling a "/tor/networkstatus-bridges"
1619 directory request. Now compare correctly. Noticed by Veracode.
1620 - Recover from bad tracked-since value in MTBF-history file.
1622 - Alter the code that tries to recover from unhandled write
1623 errors, to not try to flush onto a socket that's given us
1624 unhandled errors. Bugfix on 0.1.2.x.
1625 - Make Unix controlsockets work correctly on OpenBSD. Patch from
1626 tup. Bugfix on 0.2.0.3-alpha.
1628 o Minor bugfixes (other):
1629 - If we have an extra-info document for our server, always make
1630 it available on the control port, even if we haven't gotten
1631 a copy of it from an authority yet. Patch from mwenge.
1632 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
1633 - Directory mirrors no longer include a guess at the client's IP
1634 address if the connection appears to be coming from the same /24
1635 network; it was producing too many wrong guesses.
1636 - Make the new hidden service code respect the SafeLogging setting.
1637 Bugfix on 0.2.0.x. Patch from Karsten.
1638 - When starting as an authority, do not overwrite all certificates
1639 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
1640 - If we're trying to flush the last bytes on a connection (for
1641 example, when answering a directory request), reset the
1642 time-to-give-up timeout every time we manage to write something
1643 on the socket. Bugfix on 0.1.2.x.
1644 - Change the behavior of "getinfo status/good-server-descriptor"
1645 so it doesn't return failure when any authority disappears.
1646 - Even though the man page said that "TrackHostExits ." should
1647 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
1648 - Report TLS "zero return" case as a "clean close" and "IO error"
1649 as a "close". Stop calling closes "unexpected closes": existing
1650 Tors don't use SSL_close(), so having a connection close without
1651 the TLS shutdown handshake is hardly unexpected.
1652 - Send NAMESERVER_STATUS messages for a single failed nameserver
1655 o Code simplifications and refactoring:
1656 - Remove the tor_strpartition function: its logic was confused,
1657 and it was only used for one thing that could be implemented far
1661 Changes in version 0.2.0.19-alpha - 2008-02-09
1662 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
1663 handshake, makes path selection for relays more secure and IP address
1664 guessing more robust, and generally fixes a lot of bugs in preparation
1665 for calling the 0.2.0 branch stable.
1668 - Do not include recognizeable strings in the commonname part of
1669 Tor's x509 certificates.
1672 - If we're a relay, avoid picking ourselves as an introduction point,
1673 a rendezvous point, or as the final hop for internal circuits. Bug
1674 reported by taranis and lodger. Bugfix on 0.1.2.x.
1675 - Patch from "Andrew S. Lists" to catch when we contact a directory
1676 mirror at IP address X and he says we look like we're coming from
1677 IP address X. Bugfix on 0.1.2.x.
1679 o Minor features (security):
1680 - Be more paranoid about overwriting sensitive memory on free(),
1681 as a defensive programming tactic to ensure forward secrecy.
1683 o Minor features (directory authority):
1684 - Actually validate the options passed to AuthDirReject,
1685 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
1686 - Reject router descriptors with out-of-range bandwidthcapacity or
1687 bandwidthburst values.
1689 o Minor features (controller):
1690 - Reject controller commands over 1MB in length. This keeps rogue
1691 processes from running us out of memory.
1693 o Minor features (misc):
1694 - Give more descriptive well-formedness errors for out-of-range
1695 hidden service descriptor/protocol versions.
1696 - Make memory debugging information describe more about history
1697 of cell allocation, so we can help reduce our memory use.
1699 o Deprecated features (controller):
1700 - The status/version/num-versioning and status/version/num-concurring
1701 GETINFO options are no longer useful in the v3 directory protocol:
1702 treat them as deprecated, and warn when they're used.
1705 - When our consensus networkstatus has been expired for a while, stop
1706 being willing to build circuits using it. Fixes bug 401. Bugfix
1708 - Directory caches now fetch certificates from all authorities
1709 listed in a networkstatus consensus, even when they do not
1710 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
1711 - When connecting to a bridge without specifying its key, insert
1712 the connection into the identity-to-connection map as soon as
1713 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
1714 - Detect versions of OS X where malloc_good_size() is present in the
1715 library but never actually declared. Resolves bug 587. Bugfix
1717 - Stop incorrectly truncating zlib responses to directory authority
1718 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
1719 - Stop recommending that every server operator send mail to tor-ops.
1720 Resolves bug 597. Bugfix on 0.1.2.x.
1721 - Don't trigger an assert if we start a directory authority with a
1722 private IP address (like 127.0.0.1).
1723 - Avoid possible failures when generating a directory with routers
1724 with over-long versions strings, or too many flags set. Bugfix
1726 - If an attempt to launch a DNS resolve request over the control
1727 port fails because we have overrun the limit on the number of
1728 connections, tell the controller that the request has failed.
1729 - Avoid using too little bandwidth when our clock skips a few
1730 seconds. Bugfix on 0.1.2.x.
1731 - Fix shell error when warning about missing packages in configure
1732 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
1733 - Do not become confused when receiving a spurious VERSIONS-like
1734 cell from a confused v1 client. Bugfix on 0.2.0.x.
1735 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
1736 introduction points for a hidden service have failed. Patch from
1737 Karsten Loesing. Bugfix on 0.2.0.x.
1739 o Code simplifications and refactoring:
1740 - Remove some needless generality from cpuworker code, for improved
1742 - Stop overloading the circuit_t.onionskin field for both "onionskin
1743 from a CREATE cell that we are waiting for a cpuworker to be
1744 assigned" and "onionskin from an EXTEND cell that we are going to
1745 send to an OR as soon as we are connected". Might help with bug 600.
1746 - Add an in-place version of aes_crypt() so that we can avoid doing a
1747 needless memcpy() call on each cell payload.
1750 Changes in version 0.2.0.18-alpha - 2008-01-25
1751 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
1752 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
1753 that can warn or reject connections to ports generally associated with
1754 vulnerable-plaintext protocols.
1756 o New directory authorities:
1757 - Set up dannenberg (run by CCC) as the sixth v3 directory
1761 - Fix a major memory leak when attempting to use the v2 TLS
1762 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
1763 - We accidentally enabled the under-development v2 TLS handshake
1764 code, which was causing log entries like "TLS error while
1765 renegotiating handshake". Disable it again. Resolves bug 590.
1766 - We were computing the wrong Content-Length: header for directory
1767 responses that need to be compressed on the fly, causing clients
1768 asking for those items to always fail. Bugfix on 0.2.0.x; partially
1772 - Avoid going directly to the directory authorities even if you're a
1773 relay, if you haven't found yourself reachable yet or if you've
1774 decided not to advertise your dirport yet. Addresses bug 556.
1775 - If we've gone 12 hours since our last bandwidth check, and we
1776 estimate we have less than 50KB bandwidth capacity but we could
1777 handle more, do another bandwidth test.
1778 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
1779 Tor can warn and/or refuse connections to ports commonly used with
1780 vulnerable-plaintext protocols. Currently we warn on ports 23,
1781 109, 110, and 143, but we don't reject any.
1784 - When we setconf ClientOnly to 1, close any current OR and Dir
1785 listeners. Reported by mwenge.
1786 - When we get a consensus that's been signed by more people than
1787 we expect, don't log about it; it's not a big deal. Reported
1791 - Don't answer "/tor/networkstatus-bridges" directory requests if
1792 the request isn't encrypted.
1793 - Make "ClientOnly 1" config option disable directory ports too.
1794 - Patches from Karsten Loesing to make v2 hidden services more
1795 robust: work even when there aren't enough HSDir relays available;
1796 retry when a v2 rend desc fetch fails; but don't retry if we
1797 already have a usable v0 rend desc.
1800 Changes in version 0.2.0.17-alpha - 2008-01-17
1801 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
1804 - Make the tor-gencert man page get included correctly in the tarball.
1807 Changes in version 0.2.0.16-alpha - 2008-01-17
1808 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
1809 Loesing, and generally cleans up a lot of features and minor bugs.
1811 o New directory authorities:
1812 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
1815 o Major performance improvements:
1816 - Switch our old ring buffer implementation for one more like that
1817 used by free Unix kernels. The wasted space in a buffer with 1mb
1818 of data will now be more like 8k than 1mb. The new implementation
1819 also avoids realloc();realloc(); patterns that can contribute to
1820 memory fragmentation.
1823 - Configuration files now accept C-style strings as values. This
1824 helps encode characters not allowed in the current configuration
1825 file format, such as newline or #. Addresses bug 557.
1826 - Although we fixed bug 539 (where servers would send HTTP status 503
1827 responses _and_ send a body too), there are still servers out
1828 there that haven't upgraded. Therefore, make clients parse such
1829 bodies when they receive them.
1830 - When we're not serving v2 directory information, there is no reason
1831 to actually keep any around. Remove the obsolete files and directory
1832 on startup if they are very old and we aren't going to serve them.
1834 o Minor performance improvements:
1835 - Reference-count and share copies of address policy entries; only 5%
1836 of them were actually distinct.
1837 - Never walk through the list of logs if we know that no log is
1838 interested in a given message.
1841 - When an authority has not signed a consensus, do not try to
1842 download a nonexistent "certificate with key 00000000". Bugfix
1843 on 0.2.0.x. Fixes bug 569.
1844 - Fix a rare assert error when we're closing one of our threads:
1845 use a mutex to protect the list of logs, so we never write to the
1846 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
1847 bug 575, which is kind of the revenge of bug 222.
1848 - Patch from Karsten Loesing to complain less at both the client
1849 and the relay when a relay used to have the HSDir flag but doesn't
1850 anymore, and we try to upload a hidden service descriptor.
1851 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
1853 - Do not try to download missing certificates until we have tried
1854 to check our fallback consensus. Fixes bug 583.
1855 - Make bridges round reported GeoIP stats info up to the nearest
1856 estimate, not down. Now we can distinguish between "0 people from
1857 this country" and "1 person from this country".
1858 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
1859 - Avoid possible segfault if key generation fails in
1860 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
1861 - Avoid segfault in the case where a badly behaved v2 versioning
1862 directory sends a signed networkstatus with missing client-versions.
1864 - Avoid segfaults on certain complex invocations of
1865 router_get_by_hexdigest(). Bugfix on 0.1.2.
1866 - Correct bad index on array access in parse_http_time(). Bugfix
1868 - Fix possible bug in vote generation when server versions are present
1869 but client versions are not.
1870 - Fix rare bug on REDIRECTSTREAM control command when called with no
1871 port set: it could erroneously report an error when none had
1873 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
1874 compressing large objects and find ourselves with more than 4k
1875 left over. Bugfix on 0.2.0.
1876 - Fix a small memory leak when setting up a hidden service.
1877 - Fix a few memory leaks that could in theory happen under bizarre
1879 - Fix an assert if we post a general-purpose descriptor via the
1880 control port but that descriptor isn't mentioned in our current
1881 network consensus. Bug reported by Jon McLachlan; bugfix on
1884 o Minor features (controller):
1885 - Get NS events working again. Patch from tup.
1886 - The GETCONF command now escapes and quotes configuration values
1887 that don't otherwise fit into the torrc file.
1888 - The SETCONF command now handles quoted values correctly.
1890 o Minor features (directory authorities):
1891 - New configuration options to override default maximum number of
1892 servers allowed on a single IP address. This is important for
1893 running a test network on a single host.
1894 - Actually implement the -s option to tor-gencert.
1895 - Add a manual page for tor-gencert.
1897 o Minor features (bridges):
1898 - Bridge authorities no longer serve bridge descriptors over
1899 unencrypted connections.
1901 o Minor features (other):
1902 - Add hidden services and DNSPorts to the list of things that make
1903 Tor accept that it has running ports. Change starting Tor with no
1904 ports from a fatal error to a warning; we might change it back if
1905 this turns out to confuse anybody. Fixes bug 579.
1908 Changes in version 0.1.2.19 - 2008-01-17
1909 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
1910 exit policy a little bit more conservative so it's safer to run an
1911 exit relay on a home system, and fixes a variety of smaller issues.
1914 - Exit policies now reject connections that are addressed to a
1915 relay's public (external) IP address too, unless
1916 ExitPolicyRejectPrivate is turned off. We do this because too
1917 many relays are running nearby to services that trust them based
1921 - When the clock jumps forward a lot, do not allow the bandwidth
1922 buckets to become negative. Fixes bug 544.
1923 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
1924 on every successful resolve. Reported by Mike Perry.
1925 - Purge old entries from the "rephist" database and the hidden
1926 service descriptor database even when DirPort is zero.
1927 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
1928 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
1929 crashing or mis-answering these requests.
1930 - When we decide to send a 503 response to a request for servers, do
1931 not then also send the server descriptors: this defeats the whole
1932 purpose. Fixes bug 539.
1935 - Changing the ExitPolicyRejectPrivate setting should cause us to
1936 rebuild our server descriptor.
1937 - Fix handling of hex nicknames when answering controller requests for
1938 networkstatus by name, or when deciding whether to warn about
1939 unknown routers in a config option. (Patch from mwenge.)
1940 - Fix a couple of hard-to-trigger autoconf problems that could result
1941 in really weird results on platforms whose sys/types.h files define
1942 nonstandard integer types.
1943 - Don't try to create the datadir when running --verify-config or
1944 --hash-password. Resolves bug 540.
1945 - If we were having problems getting a particular descriptor from the
1946 directory caches, and then we learned about a new descriptor for
1947 that router, we weren't resetting our failure count. Reported
1949 - Although we fixed bug 539 (where servers would send HTTP status 503
1950 responses _and_ send a body too), there are still servers out there
1951 that haven't upgraded. Therefore, make clients parse such bodies
1952 when they receive them.
1953 - Run correctly on systems where rlim_t is larger than unsigned long.
1954 This includes some 64-bit systems.
1955 - Run correctly on platforms (like some versions of OS X 10.5) where
1956 the real limit for number of open files is OPEN_FILES, not rlim_max
1957 from getrlimit(RLIMIT_NOFILES).
1958 - Avoid a spurious free on base64 failure.
1959 - Avoid segfaults on certain complex invocations of
1960 router_get_by_hexdigest().
1961 - Fix rare bug on REDIRECTSTREAM control command when called with no
1962 port set: it could erroneously report an error when none had
1966 Changes in version 0.2.0.15-alpha - 2007-12-25
1967 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
1968 features added in 0.2.0.13-alpha.
1971 - Fix several remotely triggerable asserts based on DirPort requests
1972 for a v2 or v3 networkstatus object before we were prepared. This
1973 was particularly bad for 0.2.0.13 and later bridge relays, who
1974 would never have a v2 networkstatus and would thus always crash
1975 when used. Bugfixes on 0.2.0.x.
1976 - Estimate the v3 networkstatus size more accurately, rather than
1977 estimating it at zero bytes and giving it artificially high priority
1978 compared to other directory requests. Bugfix on 0.2.0.x.
1981 - Fix configure.in logic for cross-compilation.
1982 - When we load a bridge descriptor from the cache, and it was
1983 previously unreachable, mark it as retriable so we won't just
1984 ignore it. Also, try fetching a new copy immediately. Bugfixes
1986 - The bridge GeoIP stats were counting other relays, for example
1987 self-reachability and authority-reachability tests.
1990 - Support compilation to target iPhone; patch from cjacker huang.
1991 To build for iPhone, pass the --enable-iphone option to configure.
1994 Changes in version 0.2.0.14-alpha - 2007-12-23
1996 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
1997 without a datadirectory from a previous Tor install. Reported
1999 - Fix a crash when we fetch a descriptor that turns out to be
2000 unexpected (it used to be in our networkstatus when we started
2001 fetching it, but it isn't in our current networkstatus), and we
2002 aren't using bridges. Bugfix on 0.2.0.x.
2003 - Fix a crash when accessing hidden services: it would work the first
2004 time you use a given introduction point for your service, but
2005 on subsequent requests we'd be using garbage memory. Fixed by
2006 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
2007 - Fix a crash when we load a bridge descriptor from disk but we don't
2008 currently have a Bridge line for it in our torrc. Bugfix on
2012 - If bridge authorities set BridgePassword, they will serve a
2013 snapshot of known bridge routerstatuses from their DirPort to
2014 anybody who knows that password. Unset by default.
2017 - Make the unit tests build again.
2018 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
2019 - Make PublishServerDescriptor default to 1, so the default doesn't
2020 have to change as we invent new directory protocol versions.
2021 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
2022 be included unless sys/time.h is already included. Fixes
2023 bug 553. Bugfix on 0.2.0.x.
2024 - If we receive a general-purpose descriptor and then receive an
2025 identical bridge-purpose descriptor soon after, don't discard
2026 the next one as a duplicate.
2029 - If BridgeRelay is set to 1, then the default for
2030 PublishServerDescriptor is now "bridge" rather than "v2,v3".
2031 - If the user sets RelayBandwidthRate but doesn't set
2032 RelayBandwidthBurst, then make them equal rather than erroring out.
2035 Changes in version 0.2.0.13-alpha - 2007-12-21
2036 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
2037 Goodell, fixes many more bugs, and adds a lot of infrastructure for
2040 o New directory authorities:
2041 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
2045 - Only update guard status (usable / not usable) once we have
2046 enough directory information. This was causing us to always pick
2047 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
2048 causing us to discard all our guards on startup if we hadn't been
2049 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
2050 - Purge old entries from the "rephist" database and the hidden
2051 service descriptor databases even when DirPort is zero. Bugfix
2053 - We were ignoring our RelayBandwidthRate for the first 30 seconds
2054 after opening a circuit -- even a relayed circuit. Bugfix on
2056 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
2057 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
2058 crashing or mis-answering these types of requests.
2059 - Relays were publishing their server descriptor to v1 and v2
2060 directory authorities, but they didn't try publishing to v3-only
2061 authorities. Fix this; and also stop publishing to v1 authorities.
2063 - When we were reading router descriptors from cache, we were ignoring
2064 the annotations -- so for example we were reading in bridge-purpose
2065 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
2066 - When we decided to send a 503 response to a request for servers, we
2067 were then also sending the server descriptors: this defeats the
2068 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
2071 - Bridge relays now behave like clients with respect to time
2072 intervals for downloading new consensus documents -- otherwise they
2073 stand out. Bridge users now wait until the end of the interval,
2074 so their bridge relay will be sure to have a new consensus document.
2075 - Three new config options (AlternateDirAuthority,
2076 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
2077 user selectively replace the default directory authorities by type,
2078 rather than the all-or-nothing replacement that DirServer offers.
2079 - Tor can now be configured to read a GeoIP file from disk in one
2080 of two formats. This can be used by controllers to map IP addresses
2081 to countries. Eventually, it may support exit-by-country.
2082 - When possible, bridge relays remember which countries users
2083 are coming from, and report aggregate information in their
2084 extra-info documents, so that the bridge authorities can learn
2085 where Tor is blocked.
2086 - Bridge directory authorities now do reachability testing on the
2087 bridges they know. They provide router status summaries to the
2088 controller via "getinfo ns/purpose/bridge", and also dump summaries
2089 to a file periodically.
2090 - Stop fetching directory info so aggressively if your DirPort is
2091 on but your ORPort is off; stop fetching v2 dir info entirely.
2092 You can override these choices with the new FetchDirInfoEarly
2096 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
2097 consensus documents when there are too many relays at a single
2098 IP address. Now clear it in v2 network status documents too, and
2099 also clear it in routerinfo_t when the relay is no longer listed
2100 in the relevant networkstatus document.
2101 - Don't crash if we get an unexpected value for the
2102 PublishServerDescriptor config option. Reported by Matt Edman;
2103 bugfix on 0.2.0.9-alpha.
2104 - Our new v2 hidden service descriptor format allows descriptors
2105 that have no introduction points. But Tor crashed when we tried
2106 to build a descriptor with no intro points (and it would have
2107 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
2109 - Fix building with dmalloc 5.5.2 with glibc.
2110 - Reject uploaded descriptors and extrainfo documents if they're
2111 huge. Otherwise we'll cache them all over the network and it'll
2112 clog everything up. Reported by Aljosha Judmayer.
2113 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
2114 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
2115 - When the DANGEROUS_VERSION controller status event told us we're
2116 running an obsolete version, it used the string "OLD" to describe
2117 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
2118 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
2119 - If we can't expand our list of entry guards (e.g. because we're
2120 using bridges or we have StrictEntryNodes set), don't mark relays
2121 down when they fail a directory request. Otherwise we're too quick
2122 to mark all our entry points down. Bugfix on 0.1.2.x.
2123 - Fix handling of hex nicknames when answering controller requests for
2124 networkstatus by name, or when deciding whether to warn about unknown
2125 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
2126 - Fix a couple of hard-to-trigger autoconf problems that could result
2127 in really weird results on platforms whose sys/types.h files define
2128 nonstandard integer types. Bugfix on 0.1.2.x.
2129 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
2130 - Don't crash on name lookup when we have no current consensus. Fixes
2131 bug 538; bugfix on 0.2.0.x.
2132 - Only Tors that want to mirror the v2 directory info should
2133 create the "cached-status" directory in their datadir. (All Tors
2134 used to create it.) Bugfix on 0.2.0.9-alpha.
2135 - Directory authorities should only automatically download Extra Info
2136 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
2139 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
2140 consumers. (We already do this on HUP.)
2141 - Authorities and caches fetch the v2 networkstatus documents
2142 less often, now that v3 is encouraged.
2143 - Add a new config option BridgeRelay that specifies you want to
2144 be a bridge relay. Right now the only difference is that it makes
2145 you answer begin_dir requests, and it makes you cache dir info,
2146 even if your DirPort isn't on.
2147 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
2148 ask about source, timestamp of arrival, purpose, etc. We need
2149 something like this to help Vidalia not do GeoIP lookups on bridge
2151 - Allow multiple HashedControlPassword config lines, to support
2152 multiple controller passwords.
2153 - Authorities now decide whether they're authoritative for a given
2154 router based on the router's purpose.
2155 - New config options AuthDirBadDir and AuthDirListBadDirs for
2156 authorities to mark certain relays as "bad directories" in the
2157 networkstatus documents. Also supports the "!baddir" directive in
2158 the approved-routers file.
2161 Changes in version 0.2.0.12-alpha - 2007-11-16
2162 This twelfth development snapshot fixes some more build problems as
2163 well as a few minor bugs.
2166 - Make it build on OpenBSD again. Patch from tup.
2167 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
2168 package-building for Red Hat, OS X, etc.
2170 o Minor bugfixes (on 0.1.2.x):
2171 - Changing the ExitPolicyRejectPrivate setting should cause us to
2172 rebuild our server descriptor.
2174 o Minor bugfixes (on 0.2.0.x):
2175 - When we're lacking a consensus, don't try to perform rendezvous
2176 operations. Reported by Karsten Loesing.
2177 - Fix a small memory leak whenever we decide against using a
2178 newly picked entry guard. Reported by Mike Perry.
2179 - When authorities detected more than two relays running on the same
2180 IP address, they were clearing all the status flags but forgetting
2181 to clear the "hsdir" flag. So clients were being told that a
2182 given relay was the right choice for a v2 hsdir lookup, yet they
2183 never had its descriptor because it was marked as 'not running'
2185 - If we're trying to fetch a bridge descriptor and there's no way
2186 the bridge authority could help us (for example, we don't know
2187 a digest, or there is no bridge authority), don't be so eager to
2188 fall back to asking the bridge authority.
2189 - If we're using bridges or have strictentrynodes set, and our
2190 chosen exit is in the same family as all our bridges/entry guards,
2191 then be flexible about families.
2194 - When we negotiate a v2 link-layer connection (not yet implemented),
2195 accept RELAY_EARLY cells and turn them into RELAY cells if we've
2196 negotiated a v1 connection for their next step. Initial code for
2200 Changes in version 0.2.0.11-alpha - 2007-11-12
2201 This eleventh development snapshot fixes some build problems with
2202 the previous snapshot. It also includes a more secure-by-default exit
2203 policy for relays, fixes an enormous memory leak for exit relays, and
2204 fixes another bug where servers were falling out of the directory list.
2207 - Exit policies now reject connections that are addressed to a
2208 relay's public (external) IP address too, unless
2209 ExitPolicyRejectPrivate is turned off. We do this because too
2210 many relays are running nearby to services that trust them based
2211 on network address. Bugfix on 0.1.2.x.
2214 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2215 on every successful resolve. Reported by Mike Perry; bugfix
2217 - On authorities, never downgrade to old router descriptors simply
2218 because they're listed in the consensus. This created a catch-22
2219 where we wouldn't list a new descriptor because there was an
2220 old one in the consensus, and we couldn't get the new one in the
2221 consensus because we wouldn't list it. Possible fix for bug 548.
2222 Also, this might cause bug 543 to appear on authorities; if so,
2223 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
2225 o Packaging fixes on 0.2.0.10-alpha:
2226 - We were including instructions about what to do with the
2227 src/config/fallback-consensus file, but we weren't actually
2228 including it in the tarball. Disable all of that for now.
2231 - Allow people to say PreferTunnelledDirConns rather than
2232 PreferTunneledDirConns, for those alternate-spellers out there.
2235 - Don't reevaluate all the information from our consensus document
2236 just because we've downloaded a v2 networkstatus that we intend
2237 to cache. Fixes bug 545; bugfix on 0.2.0.x.
2240 Changes in version 0.2.0.10-alpha - 2007-11-10
2241 This tenth development snapshot adds a third v3 directory authority
2242 run by Mike Perry, adds most of Karsten Loesing's new hidden service
2243 descriptor format, fixes a bad crash bug and new bridge bugs introduced
2244 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
2245 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
2246 addresses many more minor issues.
2248 o New directory authorities:
2249 - Set up ides (run by Mike Perry) as the third v3 directory authority.
2252 - Allow tunnelled directory connections to ask for an encrypted
2253 "begin_dir" connection or an anonymized "uses a full Tor circuit"
2254 connection independently. Now we can make anonymized begin_dir
2255 connections for (e.g.) more secure hidden service posting and
2257 - More progress on proposal 114: code from Karsten Loesing to
2258 implement new hidden service descriptor format.
2259 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
2260 accommodate the growing number of servers that use the default
2261 and are reaching it.
2262 - Directory authorities use a new formula for selecting which nodes
2263 to advertise as Guards: they must be in the top 7/8 in terms of
2264 how long we have known about them, and above the median of those
2265 nodes in terms of weighted fractional uptime.
2266 - Make "not enough dir info yet" warnings describe *why* Tor feels
2267 it doesn't have enough directory info yet.
2270 - Stop servers from crashing if they set a Family option (or
2271 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
2273 - Make bridge users work again -- the move to v3 directories in
2274 0.2.0.9-alpha had introduced a number of bugs that made bridges
2275 no longer work for clients.
2276 - When the clock jumps forward a lot, do not allow the bandwidth
2277 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
2279 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
2280 - When the consensus lists a router descriptor that we previously were
2281 mirroring, but that we considered non-canonical, reload the
2282 descriptor as canonical. This fixes bug 543 where Tor servers
2283 would start complaining after a few days that they don't have
2284 enough directory information to build a circuit.
2285 - Consider replacing the current consensus when certificates arrive
2286 that make the pending consensus valid. Previously, we were only
2287 considering replacement when the new certs _didn't_ help.
2288 - Fix an assert error on startup if we didn't already have the
2289 consensus and certs cached in our datadirectory: we were caching
2290 the consensus in consensus_waiting_for_certs but then free'ing it
2292 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
2293 Request) if we need more v3 certs but we've already got pending
2294 requests for all of them.
2295 - Correctly back off from failing certificate downloads. Fixes
2297 - Authorities don't vote on the Running flag if they have been running
2298 for less than 30 minutes themselves. Fixes bug 547, where a newly
2299 started authority would vote that everyone was down.
2302 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
2303 it, it had no AES, and it hasn't seen any security patches since
2307 - Clients now hold circuitless TLS connections open for 1.5 times
2308 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
2309 rebuild a new circuit over them within that timeframe. Previously,
2310 they held them open only for KeepalivePeriod (5 minutes).
2311 - Use "If-Modified-Since" to avoid retrieving consensus
2312 networkstatuses that we already have.
2313 - When we have no consensus, check FallbackNetworkstatusFile (defaults
2314 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
2315 we start knowing some directory caches.
2316 - When we receive a consensus from the future, warn about skew.
2317 - Improve skew reporting: try to give the user a better log message
2318 about how skewed they are, and how much this matters.
2319 - When we have a certificate for an authority, believe that
2320 certificate's claims about the authority's IP address.
2321 - New --quiet command-line option to suppress the default console log.
2322 Good in combination with --hash-password.
2323 - Authorities send back an X-Descriptor-Not-New header in response to
2324 an accepted-but-discarded descriptor upload. Partially implements
2326 - Make the log message for "tls error. breaking." more useful.
2327 - Better log messages about certificate downloads, to attempt to
2328 track down the second incarnation of bug 546.
2330 o Minor features (bridges):
2331 - If bridge users set UpdateBridgesFromAuthority, but the digest
2332 they ask for is a 404 from the bridge authority, they now fall
2333 back to trying the bridge directly.
2334 - Bridges now use begin_dir to publish their server descriptor to
2335 the bridge authority, even when they haven't set TunnelDirConns.
2337 o Minor features (controller):
2338 - When reporting clock skew, and we know that the clock is _at least
2339 as skewed_ as some value, but we don't know the actual value,
2340 report the value as a "minimum skew."
2343 - Update linux-tor-prio.sh script to allow QoS based on the uid of
2344 the Tor process. Patch from Marco Bonetti with tweaks from Mike
2348 - Refuse to start if both ORPort and UseBridges are set. Bugfix
2349 on 0.2.0.x, suggested by Matt Edman.
2350 - Don't stop fetching descriptors when FetchUselessDescriptors is
2351 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
2352 reported by tup and ioerror.
2353 - Better log message on vote from unknown authority.
2354 - Don't log "Launching 0 request for 0 router" message.
2356 o Minor bugfixes (memory leaks):
2357 - Stop leaking memory every time we parse a v3 certificate. Bugfix
2359 - Stop leaking memory every time we load a v3 certificate. Bugfix
2360 on 0.2.0.1-alpha. Fixes bug 536.
2361 - Stop leaking a cached networkstatus on exit. Bugfix on
2363 - Stop leaking voter information every time we free a consensus.
2364 Bugfix on 0.2.0.3-alpha.
2365 - Stop leaking signed data every time we check a voter signature.
2366 Bugfix on 0.2.0.3-alpha.
2367 - Stop leaking a signature every time we fail to parse a consensus or
2368 a vote. Bugfix on 0.2.0.3-alpha.
2369 - Stop leaking v2_download_status_map on shutdown. Bugfix on
2371 - Stop leaking conn->nickname every time we make a connection to a
2372 Tor relay without knowing its expected identity digest (e.g. when
2373 using bridges). Bugfix on 0.2.0.3-alpha.
2375 - Minor bugfixes (portability):
2376 - Run correctly on platforms where rlim_t is larger than unsigned
2377 long, and/or where the real limit for number of open files is
2378 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
2379 particular, these may be needed for OS X 10.5.
2382 Changes in version 0.1.2.18 - 2007-10-28
2383 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
2384 hidden service introduction that were causing huge delays, and a big
2385 bug that was causing some servers to disappear from the network status
2386 lists for a few hours each day.
2388 o Major bugfixes (crashes):
2389 - If a connection is shut down abruptly because of something that
2390 happened inside connection_flushed_some(), do not call
2391 connection_finished_flushing(). Should fix bug 451:
2392 "connection_stop_writing: Assertion conn->write_event failed"
2393 Bugfix on 0.1.2.7-alpha.
2394 - Fix possible segfaults in functions called from
2395 rend_process_relay_cell().
2397 o Major bugfixes (hidden services):
2398 - Hidden services were choosing introduction points uniquely by
2399 hexdigest, but when constructing the hidden service descriptor
2400 they merely wrote the (potentially ambiguous) nickname.
2401 - Clients now use the v2 intro format for hidden service
2402 connections: they specify their chosen rendezvous point by identity
2403 digest rather than by (potentially ambiguous) nickname. These
2404 changes could speed up hidden service connections dramatically.
2406 o Major bugfixes (other):
2407 - Stop publishing a new server descriptor just because we get a
2408 HUP signal. This led (in a roundabout way) to some servers getting
2409 dropped from the networkstatus lists for a few hours each day.
2410 - When looking for a circuit to cannibalize, consider family as well
2411 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
2412 circuit cannibalization).
2413 - When a router wasn't listed in a new networkstatus, we were leaving
2414 the flags for that router alone -- meaning it remained Named,
2415 Running, etc -- even though absence from the networkstatus means
2416 that it shouldn't be considered to exist at all anymore. Now we
2417 clear all the flags for routers that fall out of the networkstatus
2418 consensus. Fixes bug 529.
2421 - Don't try to access (or alter) the state file when running
2422 --list-fingerprint or --verify-config or --hash-password. Resolves
2424 - When generating information telling us how to extend to a given
2425 router, do not try to include the nickname if it is
2426 absent. Resolves bug 467.
2427 - Fix a user-triggerable segfault in expand_filename(). (There isn't
2428 a way to trigger this remotely.)
2429 - When sending a status event to the controller telling it that an
2430 OR address is reachable, set the port correctly. (Previously we
2431 were reporting the dir port.)
2432 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
2433 command. Bugfix on 0.1.2.17.
2434 - When loading bandwidth history, do not believe any information in
2435 the future. Fixes bug 434.
2436 - When loading entry guard information, do not believe any information
2438 - When we have our clock set far in the future and generate an
2439 onion key, then re-set our clock to be correct, we should not stop
2440 the onion key from getting rotated.
2441 - On some platforms, accept() can return a broken address. Detect
2442 this more quietly, and deal accordingly. Fixes bug 483.
2443 - It's not actually an error to find a non-pending entry in the DNS
2444 cache when canceling a pending resolve. Don't log unless stuff
2445 is fishy. Resolves bug 463.
2446 - Don't reset trusted dir server list when we set a configuration
2447 option. Patch from Robert Hogan.
2448 - Don't try to create the datadir when running --verify-config or
2449 --hash-password. Resolves bug 540.
2452 Changes in version 0.2.0.9-alpha - 2007-10-24
2453 This ninth development snapshot switches clients to the new v3 directory
2454 system; allows servers to be listed in the network status even when they
2455 have the same nickname as a registered server; and fixes many other
2456 bugs including a big one that was causing some servers to disappear
2457 from the network status lists for a few hours each day.
2459 o Major features (directory system):
2460 - Clients now download v3 consensus networkstatus documents instead
2461 of v2 networkstatus documents. Clients and caches now base their
2462 opinions about routers on these consensus documents. Clients only
2463 download router descriptors listed in the consensus.
2464 - Authorities now list servers who have the same nickname as
2465 a different named server, but list them with a new flag,
2466 "Unnamed". Now we can list servers that happen to pick the same
2467 nickname as a server that registered two years ago and then
2468 disappeared. Partially implements proposal 122.
2469 - If the consensus lists a router as "Unnamed", the name is assigned
2470 to a different router: do not identify the router by that name.
2471 Partially implements proposal 122.
2472 - Authorities can now come to a consensus on which method to use to
2473 compute the consensus. This gives us forward compatibility.
2476 - Stop publishing a new server descriptor just because we HUP or
2477 when we find our DirPort to be reachable but won't actually publish
2478 it. New descriptors without any real changes are dropped by the
2479 authorities, and can screw up our "publish every 18 hours" schedule.
2481 - When a router wasn't listed in a new networkstatus, we were leaving
2482 the flags for that router alone -- meaning it remained Named,
2483 Running, etc -- even though absence from the networkstatus means
2484 that it shouldn't be considered to exist at all anymore. Now we
2485 clear all the flags for routers that fall out of the networkstatus
2486 consensus. Fixes bug 529; bugfix on 0.1.2.x.
2487 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
2488 extrainfo documents and then discard them immediately for not
2489 matching the latest router. Bugfix on 0.2.0.1-alpha.
2491 o Minor features (v3 directory protocol):
2492 - Allow tor-gencert to generate a new certificate without replacing
2494 - Allow certificates to include an address.
2495 - When we change our directory-cache settings, reschedule all voting
2496 and download operations.
2497 - Reattempt certificate downloads immediately on failure, as long as
2498 we haven't failed a threshold number of times yet.
2499 - Delay retrying consensus downloads while we're downloading
2500 certificates to verify the one we just got. Also, count getting a
2501 consensus that we already have (or one that isn't valid) as a failure,
2502 and count failing to get the certificates after 20 minutes as a
2504 - Build circuits and download descriptors even if our consensus is a
2505 little expired. (This feature will go away once authorities are
2508 o Minor features (router descriptor cache):
2509 - If we find a cached-routers file that's been sitting around for more
2510 than 28 days unmodified, then most likely it's a leftover from
2511 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
2513 - When we (as a cache) download a descriptor because it was listed
2514 in a consensus, remember when the consensus was supposed to expire,
2515 and don't expire the descriptor until then.
2517 o Minor features (performance):
2518 - Call routerlist_remove_old_routers() much less often. This should
2519 speed startup, especially on directory caches.
2520 - Don't try to launch new descriptor downloads quite so often when we
2521 already have enough directory information to build circuits.
2522 - Base64 decoding was actually showing up on our profile when parsing
2523 the initial descriptor file; switch to an in-process all-at-once
2524 implementation that's about 3.5x times faster than calling out to
2527 o Minor features (compilation):
2528 - Detect non-ASCII platforms (if any still exist) and refuse to
2529 build there: some of our code assumes that 'A' is 65 and so on.
2531 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
2532 - Make the "next period" votes into "current period" votes immediately
2533 after publishing the consensus; avoid a heisenbug that made them
2534 stick around indefinitely.
2535 - When we discard a vote as a duplicate, do not report this as
2537 - Treat missing v3 keys or certificates as an error when running as a
2538 v3 directory authority.
2539 - When we're configured to be a v3 authority, but we're only listed
2540 as a non-v3 authority in our DirServer line for ourself, correct
2542 - If an authority doesn't have a qualified hostname, just put
2543 its address in the vote. This fixes the problem where we referred to
2544 "moria on moria:9031."
2545 - Distinguish between detached signatures for the wrong period, and
2546 detached signatures for a divergent vote.
2547 - Fix a small memory leak when computing a consensus.
2548 - When there's no concensus, we were forming a vote every 30
2549 minutes, but writing the "valid-after" line in our vote based
2550 on our configured V3AuthVotingInterval: so unless the intervals
2551 matched up, we immediately rejected our own vote because it didn't
2552 start at the voting interval that caused us to construct a vote.
2554 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
2555 - Delete unverified-consensus when the real consensus is set.
2556 - Consider retrying a consensus networkstatus fetch immediately
2557 after one fails: don't wait 60 seconds to notice.
2558 - When fetching a consensus as a cache, wait until a newer consensus
2559 should exist before trying to replace the current one.
2560 - Use a more forgiving schedule for retrying failed consensus
2561 downloads than for other types.
2563 o Minor bugfixes (other directory issues):
2564 - Correct the implementation of "download votes by digest." Bugfix on
2566 - Authorities no longer send back "400 you're unreachable please fix
2567 it" errors to Tor servers that aren't online all the time. We're
2568 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
2570 o Minor bugfixes (controller):
2571 - Don't reset trusted dir server list when we set a configuration
2572 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
2573 - Respond to INT and TERM SIGNAL commands before we execute the
2574 signal, in case the signal shuts us down. We had a patch in
2575 0.1.2.1-alpha that tried to do this by queueing the response on
2576 the connection's buffer before shutting down, but that really
2577 isn't the same thing at all. Bug located by Matt Edman.
2579 o Minor bugfixes (misc):
2580 - Correctly check for bad options to the "PublishServerDescriptor"
2581 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
2582 - Stop leaking memory on failing case of base32_decode, and make
2583 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
2584 - Don't try to download extrainfo documents when we're trying to
2585 fetch enough directory info to build a circuit: having enough
2586 info should get priority. Bugfix on 0.2.0.x.
2587 - Don't complain that "your server has not managed to confirm that its
2588 ports are reachable" if we haven't been able to build any circuits
2589 yet. Bug found by spending four hours without a v3 consensus. Bugfix
2591 - Detect the reason for failing to mmap a descriptor file we just
2592 wrote, and give a more useful log message. Fixes bug 533. Bugfix
2595 o Code simplifications and refactoring:
2596 - Remove support for the old bw_accounting file: we've been storing
2597 bandwidth accounting information in the state file since
2598 0.1.2.5-alpha. This may result in bandwidth accounting errors
2599 if you try to upgrade from 0.1.1.x or earlier, or if you try to
2600 downgrade to 0.1.1.x or earlier.
2601 - New convenience code to locate a file within the DataDirectory.
2602 - Move non-authority functionality out of dirvote.c.
2603 - Refactor the arguments for router_pick_{directory_|trusteddir}server
2604 so that they all take the same named flags.
2607 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
2608 Unix users an easy way to script their Tor process (e.g. by
2609 adjusting bandwidth based on the time of the day).
2612 Changes in version 0.2.0.8-alpha - 2007-10-12
2613 This eighth development snapshot fixes a crash bug that's been bothering
2614 us since February 2007, lets bridge authorities store a list of bridge
2615 descriptors they've seen, gets v3 directory voting closer to working,
2616 starts caching v3 directory consensus documents on directory mirrors,
2617 and fixes a variety of smaller issues including some minor memory leaks.
2619 o Major features (router descriptor cache):
2620 - Store routers in a file called cached-descriptors instead of in
2621 cached-routers. Initialize cached-descriptors from cached-routers
2622 if the old format is around. The new format allows us to store
2623 annotations along with descriptors.
2624 - Use annotations to record the time we received each descriptor, its
2625 source, and its purpose.
2626 - Disable the SETROUTERPURPOSE controller command: it is now
2628 - Controllers should now specify cache=no or cache=yes when using
2629 the +POSTDESCRIPTOR command.
2630 - Bridge authorities now write bridge descriptors to disk, meaning
2631 we can export them to other programs and begin distributing them
2634 o Major features (directory authorities):
2635 - When a v3 authority is missing votes or signatures, it now tries
2637 - Directory authorities track weighted fractional uptime as well as
2638 weighted mean-time-between failures. WFU is suitable for deciding
2639 whether a node is "usually up", while MTBF is suitable for deciding
2640 whether a node is "likely to stay up." We need both, because
2641 "usually up" is a good requirement for guards, while "likely to
2642 stay up" is a good requirement for long-lived connections.
2644 o Major features (v3 directory system):
2645 - Caches now download v3 network status documents as needed,
2646 and download the descriptors listed in them.
2647 - All hosts now attempt to download and keep fresh v3 authority
2648 certificates, and re-attempt after failures.
2649 - More internal-consistency checks for vote parsing.
2651 o Major bugfixes (crashes):
2652 - If a connection is shut down abruptly because of something that
2653 happened inside connection_flushed_some(), do not call
2654 connection_finished_flushing(). Should fix bug 451. Bugfix on
2657 o Major bugfixes (performance):
2658 - Fix really bad O(n^2) performance when parsing a long list of
2659 routers: Instead of searching the entire list for an "extra-info "
2660 string which usually wasn't there, once for every routerinfo
2661 we read, just scan lines forward until we find one we like.
2663 - When we add data to a write buffer in response to the data on that
2664 write buffer getting low because of a flush, do not consider the
2665 newly added data as a candidate for immediate flushing, but rather
2666 make it wait until the next round of writing. Otherwise, we flush
2667 and refill recursively, and a single greedy TLS connection can
2668 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
2670 o Minor features (v3 authority system):
2671 - Add more ways for tools to download the votes that lead to the
2673 - Send a 503 when low on bandwidth and a vote, consensus, or
2674 certificate is requested.
2675 - If-modified-since is now implemented properly for all kinds of
2676 certificate requests.
2678 o Minor bugfixes (network statuses):
2679 - Tweak the implementation of proposal 109 slightly: allow at most
2680 two Tor servers on the same IP address, except if it's the location
2681 of a directory authority, in which case allow five. Bugfix on
2684 o Minor bugfixes (controller):
2685 - When sending a status event to the controller telling it that an
2686 OR address is reachable, set the port correctly. (Previously we
2687 were reporting the dir port.) Bugfix on 0.1.2.x.
2689 o Minor bugfixes (v3 directory system):
2690 - Fix logic to look up a cert by its signing key digest. Bugfix on
2692 - Only change the reply to a vote to "OK" if it's not already
2693 set. This gets rid of annoying "400 OK" log messages, which may
2694 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
2695 - When we get a valid consensus, recompute the voting schedule.
2696 - Base the valid-after time of a vote on the consensus voting
2697 schedule, not on our preferred schedule.
2698 - Make the return values and messages from signature uploads and
2699 downloads more sensible.
2700 - Fix a memory leak when serving votes and consensus documents, and
2701 another when serving certificates.
2703 o Minor bugfixes (performance):
2704 - Use a slightly simpler string hashing algorithm (copying Python's
2705 instead of Java's) and optimize our digest hashing algorithm to take
2706 advantage of 64-bit platforms and to remove some possibly-costly
2708 - Fix a minor memory leak whenever we parse guards from our state
2709 file. Bugfix on 0.2.0.7-alpha.
2710 - Fix a minor memory leak whenever we write out a file. Bugfix on
2712 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
2713 command. Bugfix on 0.2.0.5-alpha.
2715 o Minor bugfixes (portability):
2716 - On some platforms, accept() can return a broken address. Detect
2717 this more quietly, and deal accordingly. Fixes bug 483.
2718 - Stop calling tor_strlower() on uninitialized memory in some cases.
2719 Bugfix in 0.2.0.7-alpha.
2721 o Minor bugfixes (usability):
2722 - Treat some 403 responses from directory servers as INFO rather than
2723 WARN-severity events.
2724 - It's not actually an error to find a non-pending entry in the DNS
2725 cache when canceling a pending resolve. Don't log unless stuff is
2726 fishy. Resolves bug 463.
2728 o Minor bugfixes (anonymity):
2729 - Never report that we've used more bandwidth than we're willing to
2730 relay: it leaks how much non-relay traffic we're using. Resolves
2732 - When looking for a circuit to cannibalize, consider family as well
2733 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
2734 circuit cannibalization).
2736 o Code simplifications and refactoring:
2737 - Make a bunch of functions static. Remove some dead code.
2738 - Pull out about a third of the really big routerlist.c; put it in a
2739 new module, networkstatus.c.
2740 - Merge the extra fields in local_routerstatus_t back into
2741 routerstatus_t: we used to need one routerstatus_t for each
2742 authority's opinion, plus a local_routerstatus_t for the locally
2743 computed consensus opinion. To save space, we put the locally
2744 modified fields into local_routerstatus_t, and only the common
2745 stuff into routerstatus_t. But once v3 directories are in use,
2746 clients and caches will no longer need to hold authority opinions;
2747 thus, the rationale for keeping the types separate is now gone.
2748 - Make the code used to reschedule and reattempt downloads more
2750 - Turn all 'Are we a directory server/mirror?' logic into a call to
2752 - Remove the code to generate the oldest (v1) directory format.
2753 The code has been disabled since 0.2.0.5-alpha.
2756 Changes in version 0.2.0.7-alpha - 2007-09-21
2757 This seventh development snapshot makes bridges work again, makes bridge
2758 authorities work for the first time, fixes two huge performance flaws
2759 in hidden services, and fixes a variety of minor issues.
2761 o New directory authorities:
2762 - Set up moria1 and tor26 as the first v3 directory authorities. See
2763 doc/spec/dir-spec.txt for details on the new directory design.
2765 o Major bugfixes (crashes):
2766 - Fix possible segfaults in functions called from
2767 rend_process_relay_cell(). Bugfix on 0.1.2.x.
2769 o Major bugfixes (bridges):
2770 - Fix a bug that made servers send a "404 Not found" in response to
2771 attempts to fetch their server descriptor. This caused Tor servers
2772 to take many minutes to establish reachability for their DirPort,
2773 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
2774 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
2775 users configure that and specify a bridge with an identity
2776 fingerprint, now they will lookup the bridge descriptor at the
2777 default bridge authority via a one-hop tunnel, but once circuits
2778 are established they will switch to a three-hop tunnel for later
2779 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
2781 o Major bugfixes (hidden services):
2782 - Hidden services were choosing introduction points uniquely by
2783 hexdigest, but when constructing the hidden service descriptor
2784 they merely wrote the (potentially ambiguous) nickname.
2785 - Clients now use the v2 intro format for hidden service
2786 connections: they specify their chosen rendezvous point by identity
2787 digest rather than by (potentially ambiguous) nickname. Both
2788 are bugfixes on 0.1.2.x, and they could speed up hidden service
2789 connections dramatically. Thanks to Karsten Loesing.
2791 o Minor features (security):
2792 - As a client, do not believe any server that tells us that an
2793 address maps to an internal address space.
2794 - Make it possible to enable HashedControlPassword and
2795 CookieAuthentication at the same time.
2797 o Minor features (guard nodes):
2798 - Tag every guard node in our state file with the version that
2799 we believe added it, or with our own version if we add it. This way,
2800 if a user temporarily runs an old version of Tor and then switches
2801 back to a new one, she doesn't automatically lose her guards.
2803 o Minor features (speed):
2804 - When implementing AES counter mode, update only the portions of the
2805 counter buffer that need to change, and don't keep separate
2806 network-order and host-order counters when they are the same (i.e.,
2807 on big-endian hosts.)
2809 o Minor features (controller):
2810 - Accept LF instead of CRLF on controller, since some software has a
2811 hard time generating real Internet newlines.
2812 - Add GETINFO values for the server status events
2813 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
2817 - Routers no longer include bandwidth-history lines in their
2818 descriptors; this information is already available in extra-info
2819 documents, and including it in router descriptors took up 60%
2820 (!) of compressed router descriptor downloads. Completes
2821 implementation of proposal 104.
2822 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
2823 and TorControl.py, as they use the old v0 controller protocol,
2824 and are obsoleted by TorFlow anyway.
2825 - Drop support for v1 rendezvous descriptors, since we never used
2826 them anyway, and the code has probably rotted by now. Based on
2827 patch from Karsten Loesing.
2828 - On OSX, stop warning the user that kqueue support in libevent is
2829 "experimental", since it seems to have worked fine for ages.
2832 - When generating information telling us how to extend to a given
2833 router, do not try to include the nickname if it is absent. Fixes
2834 bug 467. Bugfix on 0.2.0.3-alpha.
2835 - Fix a user-triggerable (but not remotely-triggerable) segfault
2836 in expand_filename(). Bugfix on 0.1.2.x.
2837 - Fix a memory leak when freeing incomplete requests from DNSPort.
2838 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
2839 - Don't try to access (or alter) the state file when running
2840 --list-fingerprint or --verify-config or --hash-password. (Resolves
2841 bug 499.) Bugfix on 0.1.2.x.
2842 - Servers used to decline to publish their DirPort if their
2843 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
2844 were below a threshold. Now they only look at BandwidthRate and
2845 RelayBandwidthRate. Bugfix on 0.1.2.x.
2846 - Remove an optimization in the AES counter-mode code that assumed
2847 that the counter never exceeded 2^68. When the counter can be set
2848 arbitrarily as an IV (as it is by Karsten's new hidden services
2849 code), this assumption no longer holds. Bugfix on 0.1.2.x.
2850 - Resume listing "AUTHORITY" flag for authorities in network status.
2851 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
2853 o Code simplifications and refactoring:
2854 - Revamp file-writing logic so we don't need to have the entire
2855 contents of a file in memory at once before we write to disk. Tor,
2857 - Turn "descriptor store" into a full-fledged type.
2858 - Move all NT services code into a separate source file.
2859 - Unify all code that computes medians, percentile elements, etc.
2860 - Get rid of a needless malloc when parsing address policies.
2863 Changes in version 0.1.2.17 - 2007-08-30
2864 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
2865 X bundles. Vidalia 0.0.14 makes authentication required for the
2866 ControlPort in the default configuration, which addresses important
2867 security risks. Everybody who uses Vidalia (or another controller)
2870 In addition, this Tor update fixes major load balancing problems with
2871 path selection, which should speed things up a lot once many people
2874 o Major bugfixes (security):
2875 - We removed support for the old (v0) control protocol. It has been
2876 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
2877 become more of a headache than it's worth.
2879 o Major bugfixes (load balancing):
2880 - When choosing nodes for non-guard positions, weight guards
2881 proportionally less, since they already have enough load. Patch
2883 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
2884 will allow fast Tor servers to get more attention.
2885 - When we're upgrading from an old Tor version, forget our current
2886 guards and pick new ones according to the new weightings. These
2887 three load balancing patches could raise effective network capacity
2888 by a factor of four. Thanks to Mike Perry for measurements.
2890 o Major bugfixes (stream expiration):
2891 - Expire not-yet-successful application streams in all cases if
2892 they've been around longer than SocksTimeout. Right now there are
2893 some cases where the stream will live forever, demanding a new
2894 circuit every 15 seconds. Fixes bug 454; reported by lodger.
2896 o Minor features (controller):
2897 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
2898 is valid before any authentication has been received. It tells
2899 a controller what kind of authentication is expected, and what
2900 protocol is spoken. Implements proposal 119.
2902 o Minor bugfixes (performance):
2903 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
2904 greatly speeding up loading cached-routers from disk on startup.
2905 - Disable sentinel-based debugging for buffer code: we squashed all
2906 the bugs that this was supposed to detect a long time ago, and now
2907 its only effect is to change our buffer sizes from nice powers of
2908 two (which platform mallocs tend to like) to values slightly over
2909 powers of two (which make some platform mallocs sad).
2911 o Minor bugfixes (misc):
2912 - If exit bandwidth ever exceeds one third of total bandwidth, then
2913 use the correct formula to weight exit nodes when choosing paths.
2914 Based on patch from Mike Perry.
2915 - Choose perfectly fairly among routers when choosing by bandwidth and
2916 weighting by fraction of bandwidth provided by exits. Previously, we
2917 would choose with only approximate fairness, and correct ourselves
2918 if we ran off the end of the list.
2919 - If we require CookieAuthentication but we fail to write the
2920 cookie file, we would warn but not exit, and end up in a state
2921 where no controller could authenticate. Now we exit.
2922 - If we require CookieAuthentication, stop generating a new cookie
2923 every time we change any piece of our config.
2924 - Refuse to start with certain directory authority keys, and
2925 encourage people using them to stop.
2926 - Terminate multi-line control events properly. Original patch
2928 - Fix a minor memory leak when we fail to find enough suitable
2929 servers to choose a circuit.
2930 - Stop leaking part of the descriptor when we run into a particularly
2931 unparseable piece of it.
2934 Changes in version 0.2.0.6-alpha - 2007-08-26
2935 This sixth development snapshot features a new Vidalia version in the
2936 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
2937 the ControlPort in the default configuration, which addresses important
2940 In addition, this snapshot fixes major load balancing problems
2941 with path selection, which should speed things up a lot once many
2942 people have upgraded. The directory authorities also use a new
2943 mean-time-between-failure approach to tracking which servers are stable,
2944 rather than just looking at the most recent uptime.
2946 o New directory authorities:
2947 - Set up Tonga as the default bridge directory authority.
2950 - Directory authorities now track servers by weighted
2951 mean-times-between-failures. When we have 4 or more days of data,
2952 use measured MTBF rather than declared uptime to decide whether
2953 to call a router Stable. Implements proposal 108.
2955 o Major bugfixes (load balancing):
2956 - When choosing nodes for non-guard positions, weight guards
2957 proportionally less, since they already have enough load. Patch
2959 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
2960 will allow fast Tor servers to get more attention.
2961 - When we're upgrading from an old Tor version, forget our current
2962 guards and pick new ones according to the new weightings. These
2963 three load balancing patches could raise effective network capacity
2964 by a factor of four. Thanks to Mike Perry for measurements.
2966 o Major bugfixes (descriptor parsing):
2967 - Handle unexpected whitespace better in malformed descriptors. Bug
2968 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
2971 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
2972 GETINFO for Torstat to use until it can switch to using extrainfos.
2973 - Optionally (if built with -DEXPORTMALLINFO) export the output
2974 of mallinfo via http, as tor/mallinfo.txt. Only accessible
2978 - Do not intermix bridge routers with controller-added
2979 routers. (Bugfix on 0.2.0.x)
2980 - Do not fail with an assert when accept() returns an unexpected
2981 address family. Addresses but does not wholly fix bug 483. (Bugfix
2983 - Let directory authorities startup even when they can't generate
2984 a descriptor immediately, e.g. because they don't know their
2986 - Stop putting the authentication cookie in a file called "0"
2987 in your working directory if you don't specify anything for the
2988 new CookieAuthFile option. Reported by Matt Edman.
2989 - Make it possible to read the PROTOCOLINFO response in a way that
2990 conforms to our control-spec. Reported by Matt Edman.
2991 - Fix a minor memory leak when we fail to find enough suitable
2992 servers to choose a circuit. Bugfix on 0.1.2.x.
2993 - Stop leaking part of the descriptor when we run into a particularly
2994 unparseable piece of it. Bugfix on 0.1.2.x.
2995 - Unmap the extrainfo cache file on exit.
2998 Changes in version 0.2.0.5-alpha - 2007-08-19
2999 This fifth development snapshot fixes compilation on Windows again;
3000 fixes an obnoxious client-side bug that slowed things down and put
3001 extra load on the network; gets us closer to using the v3 directory
3002 voting scheme; makes it easier for Tor controllers to use cookie-based
3003 authentication; and fixes a variety of other bugs.
3006 - Version 1 directories are no longer generated in full. Instead,
3007 authorities generate and serve "stub" v1 directories that list
3008 no servers. This will stop Tor versions 0.1.0.x and earlier from
3009 working, but (for security reasons) nobody should be running those
3012 o Major bugfixes (compilation, 0.2.0.x):
3013 - Try to fix Win32 compilation again: improve checking for IPv6 types.
3014 - Try to fix MSVC compilation: build correctly on platforms that do
3015 not define s6_addr16 or s6_addr32.
3016 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
3019 o Major bugfixes (stream expiration):
3020 - Expire not-yet-successful application streams in all cases if
3021 they've been around longer than SocksTimeout. Right now there are
3022 some cases where the stream will live forever, demanding a new
3023 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
3026 o Minor features (directory servers):
3027 - When somebody requests a list of statuses or servers, and we have
3028 none of those, return a 404 rather than an empty 200.
3030 o Minor features (directory voting):
3031 - Store v3 consensus status consensuses on disk, and reload them
3034 o Minor features (security):
3035 - Warn about unsafe ControlPort configurations.
3036 - Refuse to start with certain directory authority keys, and
3037 encourage people using them to stop.
3039 o Minor features (controller):
3040 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
3041 is valid before any authentication has been received. It tells
3042 a controller what kind of authentication is expected, and what
3043 protocol is spoken. Implements proposal 119.
3044 - New config option CookieAuthFile to choose a new location for the
3045 cookie authentication file, and config option
3046 CookieAuthFileGroupReadable to make it group-readable.
3048 o Minor features (unit testing):
3049 - Add command-line arguments to unit-test executable so that we can
3050 invoke any chosen test from the command line rather than having
3051 to run the whole test suite at once; and so that we can turn on
3052 logging for the unit tests.
3054 o Minor bugfixes (on 0.1.2.x):
3055 - If we require CookieAuthentication but we fail to write the
3056 cookie file, we would warn but not exit, and end up in a state
3057 where no controller could authenticate. Now we exit.
3058 - If we require CookieAuthentication, stop generating a new cookie
3059 every time we change any piece of our config.
3060 - When loading bandwidth history, do not believe any information in
3061 the future. Fixes bug 434.
3062 - When loading entry guard information, do not believe any information
3064 - When we have our clock set far in the future and generate an
3065 onion key, then re-set our clock to be correct, we should not stop
3066 the onion key from getting rotated.
3067 - Clean up torrc sample config file.
3068 - Do not automatically run configure from autogen.sh. This
3069 non-standard behavior tended to annoy people who have built other
3072 o Minor bugfixes (on 0.2.0.x):
3073 - Fix a bug with AutomapHostsOnResolve that would always cause
3074 the second request to fail. Bug reported by Kate. Bugfix on
3076 - Fix a bug in ADDRMAP controller replies that would sometimes
3077 try to print a NULL. Patch from tup.
3078 - Read v3 directory authority keys from the right location.
3079 - Numerous bugfixes to directory voting code.
3082 Changes in version 0.1.2.16 - 2007-08-01
3083 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
3084 remote attacker in certain situations to rewrite the user's torrc
3085 configuration file. This can completely compromise anonymity of users
3086 in most configurations, including those running the Vidalia bundles,
3087 TorK, etc. Or worse.
3089 o Major security fixes:
3090 - Close immediately after missing authentication on control port;
3091 do not allow multiple authentication attempts.
3094 Changes in version 0.2.0.4-alpha - 2007-08-01
3095 This fourth development snapshot fixes a critical security vulnerability
3096 for most users, specifically those running Vidalia, TorK, etc. Everybody
3097 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
3099 o Major security fixes:
3100 - Close immediately after missing authentication on control port;
3101 do not allow multiple authentication attempts.
3103 o Major bugfixes (compilation):
3104 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
3107 o Minor features (performance):
3108 - Be even more aggressive about releasing RAM from small
3109 empty buffers. Thanks to our free-list code, this shouldn't be too
3110 performance-intensive.
3111 - Disable sentinel-based debugging for buffer code: we squashed all
3112 the bugs that this was supposed to detect a long time ago, and
3113 now its only effect is to change our buffer sizes from nice
3114 powers of two (which platform mallocs tend to like) to values
3115 slightly over powers of two (which make some platform mallocs sad).
3116 - Log malloc statistics from mallinfo() on platforms where it
3120 Changes in version 0.2.0.3-alpha - 2007-07-29
3121 This third development snapshot introduces new experimental
3122 blocking-resistance features and a preliminary version of the v3
3123 directory voting design, and includes many other smaller features
3127 - The first pieces of our "bridge" design for blocking-resistance
3128 are implemented. People can run bridge directory authorities;
3129 people can run bridges; and people can configure their Tor clients
3130 with a set of bridges to use as the first hop into the Tor network.
3131 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
3133 - Create listener connections before we setuid to the configured
3134 User and Group. Now non-Windows users can choose port values
3135 under 1024, start Tor as root, and have Tor bind those ports
3136 before it changes to another UID. (Windows users could already
3138 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
3139 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
3140 on "vserver" accounts. (Patch from coderman.)
3141 - Be even more aggressive about separating local traffic from relayed
3142 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
3144 o Major features (experimental):
3145 - First cut of code for "v3 dir voting": directory authorities will
3146 vote on a common network status document rather than each publishing
3147 their own opinion. This code needs more testing and more corner-case
3148 handling before it's ready for use.
3151 - Directory authorities now call routers Fast if their bandwidth is
3152 at least 100KB/s, and consider their bandwidth adequate to be a
3153 Guard if it is at least 250KB/s, no matter the medians. This fix
3154 complements proposal 107. [Bugfix on 0.1.2.x]
3155 - Directory authorities now never mark more than 3 servers per IP as
3156 Valid and Running. (Implements proposal 109, by Kevin Bauer and
3158 - Minor change to organizationName and commonName generation
3159 procedures in TLS certificates during Tor handshakes, to invalidate
3160 some earlier censorware approaches. This is not a long-term
3161 solution, but applying it will give us a bit of time to look into
3162 the epidemiology of countermeasures as they spread.
3164 o Major bugfixes (directory):
3165 - Rewrite directory tokenization code to never run off the end of
3166 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
3168 o Minor features (controller):
3169 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
3170 match requests to applications. (Patch from Robert Hogan.)
3171 - Report address and port correctly on connections to DNSPort. (Patch
3173 - Add a RESOLVE command to launch hostname lookups. (Original patch
3175 - Add GETINFO status/enough-dir-info to let controllers tell whether
3176 Tor has downloaded sufficient directory information. (Patch
3178 - You can now use the ControlSocket option to tell Tor to listen for
3179 controller connections on Unix domain sockets on systems that
3180 support them. (Patch from Peter Palfrader.)
3181 - STREAM NEW events are generated for DNSPort requests and for
3182 tunneled directory connections. (Patch from Robert Hogan.)
3183 - New "GETINFO address-mappings/*" command to get address mappings
3184 with expiry information. "addr-mappings/*" is now deprecated.
3187 o Minor features (misc):
3188 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
3190 - The tor-gencert tool for v3 directory authorities now creates all
3191 files as readable to the file creator only, and write-protects
3192 the authority identity key.
3193 - When dumping memory usage, list bytes used in buffer memory
3195 - When running with dmalloc, dump more stats on hup and on exit.
3196 - Directory authorities now fail quickly and (relatively) harmlessly
3197 if they generate a network status document that is somehow
3200 o Traffic load balancing improvements:
3201 - If exit bandwidth ever exceeds one third of total bandwidth, then
3202 use the correct formula to weight exit nodes when choosing paths.
3203 (Based on patch from Mike Perry.)
3204 - Choose perfectly fairly among routers when choosing by bandwidth and
3205 weighting by fraction of bandwidth provided by exits. Previously, we
3206 would choose with only approximate fairness, and correct ourselves
3207 if we ran off the end of the list. [Bugfix on 0.1.2.x]
3209 o Performance improvements:
3210 - Be more aggressive with freeing buffer RAM or putting it on the
3212 - Use Critical Sections rather than Mutexes for synchronizing threads
3213 on win32; Mutexes are heavier-weight, and designed for synchronizing
3216 o Deprecated and removed features:
3217 - RedirectExits is now deprecated.
3218 - Stop allowing address masks that do not correspond to bit prefixes.
3219 We have warned about these for a really long time; now it's time
3220 to reject them. (Patch from croup.)
3222 o Minor bugfixes (directory):
3223 - Fix another crash bug related to extra-info caching. (Bug found by
3224 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
3225 - Directories no longer return a "304 not modified" when they don't
3226 have the networkstatus the client asked for. Also fix a memory
3227 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
3228 - We had accidentally labelled 0.1.2.x directory servers as not
3229 suitable for begin_dir requests, and had labelled no directory
3230 servers as suitable for uploading extra-info documents. [Bugfix
3233 o Minor bugfixes (dns):
3234 - Fix a crash when DNSPort is set more than once. (Patch from Robert
3235 Hogan.) [Bugfix on 0.2.0.2-alpha]
3236 - Add DNSPort connections to the global connection list, so that we
3237 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
3239 - Fix a dangling reference that could lead to a crash when DNSPort is
3240 changed or closed (Patch from Robert Hogan.) [Bugfix on
3243 o Minor bugfixes (controller):
3244 - Provide DNS expiry times in GMT, not in local time. For backward
3245 compatibility, ADDRMAP events only provide GMT expiry in an extended
3246 field. "GETINFO address-mappings" always does the right thing.
3247 - Use CRLF line endings properly in NS events.
3248 - Terminate multi-line control events properly. (Original patch
3249 from tup.) [Bugfix on 0.1.2.x-alpha]
3250 - Do not include spaces in SOURCE_ADDR fields in STREAM
3251 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
3254 Changes in version 0.1.2.15 - 2007-07-17
3255 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
3256 problems, fixes compilation on BSD, and fixes a variety of other
3257 bugs. Everybody should upgrade.
3259 o Major bugfixes (compilation):
3260 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
3262 o Major bugfixes (crashes):
3263 - Try even harder not to dereference the first character after
3264 an mmap(). Reported by lodger.
3265 - Fix a crash bug in directory authorities when we re-number the
3266 routerlist while inserting a new router.
3267 - When the cached-routers file is an even multiple of the page size,
3268 don't run off the end and crash. (Fixes bug 455; based on idea
3270 - Fix eventdns.c behavior on Solaris: It is critical to include
3271 orconfig.h _before_ sys/types.h, so that we can get the expected
3272 definition of _FILE_OFFSET_BITS.
3274 o Major bugfixes (security):
3275 - Fix a possible buffer overrun when using BSD natd support. Bug
3277 - When sending destroy cells from a circuit's origin, don't include
3278 the reason for tearing down the circuit. The spec says we didn't,
3279 and now we actually don't. Reported by lodger.
3280 - Keep streamids from different exits on a circuit separate. This
3281 bug may have allowed other routers on a given circuit to inject
3282 cells into streams. Reported by lodger; fixes bug 446.
3283 - If there's a never-before-connected-to guard node in our list,
3284 never choose any guards past it. This way we don't expand our
3285 guard list unless we need to.
3287 o Minor bugfixes (guard nodes):
3288 - Weight guard selection by bandwidth, so that low-bandwidth nodes
3289 don't get overused as guards.
3291 o Minor bugfixes (directory):
3292 - Correctly count the number of authorities that recommend each
3293 version. Previously, we were under-counting by 1.
3294 - Fix a potential crash bug when we load many server descriptors at
3295 once and some of them make others of them obsolete. Fixes bug 458.
3297 o Minor bugfixes (hidden services):
3298 - Stop tearing down the whole circuit when the user asks for a
3299 connection to a port that the hidden service didn't configure.
3302 o Minor bugfixes (misc):
3303 - On Windows, we were preventing other processes from reading
3304 cached-routers while Tor was running. Reported by janbar.
3305 - Fix a possible (but very unlikely) bug in picking routers by
3306 bandwidth. Add a log message to confirm that it is in fact
3307 unlikely. Patch from lodger.
3308 - Backport a couple of memory leak fixes.
3309 - Backport miscellaneous cosmetic bugfixes.
3312 Changes in version 0.2.0.2-alpha - 2007-06-02
3313 o Major bugfixes on 0.2.0.1-alpha:
3314 - Fix an assertion failure related to servers without extra-info digests.
3315 Resolves bugs 441 and 442.
3317 o Minor features (directory):
3318 - Support "If-Modified-Since" when answering HTTP requests for
3319 directories, running-routers documents, and network-status documents.
3320 (There's no need to support it for router descriptors, since those
3321 are downloaded by descriptor digest.)
3323 o Minor build issues:
3324 - Clear up some MIPSPro compiler warnings.
3325 - When building from a tarball on a machine that happens to have SVK
3326 installed, report the micro-revision as whatever version existed
3327 in the tarball, not as "x".
3330 Changes in version 0.2.0.1-alpha - 2007-06-01
3331 This early development snapshot provides new features for people running
3332 Tor as both a client and a server (check out the new RelayBandwidth
3333 config options); lets Tor run as a DNS proxy; and generally moves us
3334 forward on a lot of fronts.
3336 o Major features, server usability:
3337 - New config options RelayBandwidthRate and RelayBandwidthBurst:
3338 a separate set of token buckets for relayed traffic. Right now
3339 relayed traffic is defined as answers to directory requests, and
3340 OR connections that don't have any local circuits on them.
3342 o Major features, client usability:
3343 - A client-side DNS proxy feature to replace the need for
3344 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
3345 for DNS requests on port 9999, use the Tor network to resolve them
3346 anonymously, and send the reply back like a regular DNS server.
3347 The code still only implements a subset of DNS.
3348 - Make PreferTunneledDirConns and TunnelDirConns work even when
3349 we have no cached directory info. This means Tor clients can now
3350 do all of their connections protected by TLS.
3352 o Major features, performance and efficiency:
3353 - Directory authorities accept and serve "extra info" documents for
3354 routers. These documents contain fields from router descriptors
3355 that aren't usually needed, and that use a lot of excess
3356 bandwidth. Once these fields are removed from router descriptors,
3357 the bandwidth savings should be about 60%. [Partially implements
3359 - Servers upload extra-info documents to any authority that accepts
3360 them. Authorities (and caches that have been configured to download
3361 extra-info documents) download them as needed. [Partially implements
3363 - Change the way that Tor buffers data that it is waiting to write.
3364 Instead of queueing data cells in an enormous ring buffer for each
3365 client->OR or OR->OR connection, we now queue cells on a separate
3366 queue for each circuit. This lets us use less slack memory, and
3367 will eventually let us be smarter about prioritizing different kinds
3369 - Use memory pools to allocate cells with better speed and memory
3370 efficiency, especially on platforms where malloc() is inefficient.
3371 - Stop reading on edge connections when their corresponding circuit
3372 buffers are full; start again as the circuits empty out.
3374 o Major features, other:
3375 - Add an HSAuthorityRecordStats option that hidden service authorities
3376 can use to track statistics of overall hidden service usage without
3377 logging information that would be very useful to an attacker.
3378 - Start work implementing multi-level keys for directory authorities:
3379 Add a standalone tool to generate key certificates. (Proposal 103.)
3382 - Directory authorities now call routers Stable if they have an
3383 uptime of at least 30 days, even if that's not the median uptime
3384 in the network. Implements proposal 107, suggested by Kevin Bauer
3387 o Minor fixes (resource management):
3388 - Count the number of open sockets separately from the number
3389 of active connection_t objects. This will let us avoid underusing
3390 our allocated connection limit.
3391 - We no longer use socket pairs to link an edge connection to an
3392 anonymous directory connection or a DirPort test connection.
3393 Instead, we track the link internally and transfer the data
3394 in-process. This saves two sockets per "linked" connection (at the
3395 client and at the server), and avoids the nasty Windows socketpair()
3397 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
3398 for every single inactive connection_t. Free items from the
3399 4k/16k-buffer free lists when they haven't been used for a while.
3401 o Minor features (build):
3402 - Make autoconf search for libevent, openssl, and zlib consistently.
3403 - Update deprecated macros in configure.in.
3404 - When warning about missing headers, tell the user to let us
3405 know if the compile succeeds anyway, so we can downgrade the
3407 - Include the current subversion revision as part of the version
3408 string: either fetch it directly if we're in an SVN checkout, do
3409 some magic to guess it if we're in an SVK checkout, or use
3410 the last-detected version if we're building from a .tar.gz.
3411 Use this version consistently in log messages.
3413 o Minor features (logging):
3414 - Always prepend "Bug: " to any log message about a bug.
3415 - Put a platform string (e.g. "Linux i686") in the startup log
3416 message, so when people paste just their logs, we know if it's
3417 OpenBSD or Windows or what.
3418 - When logging memory usage, break down memory used in buffers by
3421 o Minor features (directory system):
3422 - New config option V2AuthoritativeDirectory that all directory
3423 authorities should set. This will let future authorities choose
3424 not to serve V2 directory information.
3425 - Directory authorities allow multiple router descriptors and/or extra
3426 info documents to be uploaded in a single go. This will make
3427 implementing proposal 104 simpler.
3429 o Minor features (controller):
3430 - Add a new config option __DisablePredictedCircuits designed for
3431 use by the controller, when we don't want Tor to build any circuits
3433 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
3434 so we can exit from the middle of the circuit.
3435 - Implement "getinfo status/circuit-established".
3436 - Implement "getinfo status/version/..." so a controller can tell
3437 whether the current version is recommended, and whether any versions
3438 are good, and how many authorities agree. (Patch from shibz.)
3440 o Minor features (hidden services):
3441 - Allow multiple HiddenServicePort directives with the same virtual
3442 port; when they occur, the user is sent round-robin to one
3443 of the target ports chosen at random. Partially fixes bug 393 by
3444 adding limited ad-hoc round-robining.
3446 o Minor features (other):
3448 - Add a new AutomapHostsOnResolve option: when it is enabled, any
3449 resolve request for hosts matching a given pattern causes Tor to
3450 generate an internal virtual address mapping for that host. This
3451 allows DNSPort to work sensibly with hidden service users. By
3452 default, .exit and .onion addresses are remapped; the list of
3453 patterns can be reconfigured with AutomapHostsSuffixes.
3454 - Add an "-F" option to tor-resolve to force a resolve for a .onion
3455 address. Thanks to the AutomapHostsOnResolve option, this is no
3456 longer a completely silly thing to do.
3457 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
3458 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
3459 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
3460 minus 1 byte: the actual maximum declared bandwidth.
3463 - Removed support for the old binary "version 0" controller protocol.
3464 This has been deprecated since 0.1.1, and warnings have been issued
3465 since 0.1.2. When we encounter a v0 control message, we now send
3466 back an error and close the connection.
3467 - Remove the old "dns worker" server DNS code: it hasn't been default
3468 since 0.1.2.2-alpha, and all the servers seem to be using the new
3471 o Minor bugfixes (portability):
3472 - Even though Windows is equally happy with / and \ as path separators,
3473 try to use \ consistently on Windows and / consistently on Unix: it
3474 makes the log messages nicer.
3475 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
3476 - Read resolv.conf files correctly on platforms where read() returns
3477 partial results on small file reads.
3479 o Minor bugfixes (directory):
3480 - Correctly enforce that elements of directory objects do not appear
3481 more often than they are allowed to appear.
3482 - When we are reporting the DirServer line we just parsed, we were
3483 logging the second stanza of the key fingerprint, not the first.
3485 o Minor bugfixes (logging):
3486 - When we hit an EOF on a log (probably because we're shutting down),
3487 don't try to remove the log from the list: just mark it as
3488 unusable. (Bulletproofs against bug 222.)
3490 o Minor bugfixes (other):
3491 - In the exitlist script, only consider the most recently published
3492 server descriptor for each server. Also, when the user requests
3493 a list of servers that _reject_ connections to a given address,
3494 explicitly exclude the IPs that also have servers that accept
3495 connections to that address. (Resolves bug 405.)
3496 - Stop allowing hibernating servers to be "stable" or "fast".
3497 - On Windows, we were preventing other processes from reading
3498 cached-routers while Tor was running. (Reported by janbar)
3499 - Make the NodeFamilies config option work. (Reported by
3500 lodger -- it has never actually worked, even though we added it
3502 - Check return values from pthread_mutex functions.
3503 - Don't save non-general-purpose router descriptors to the disk cache,
3504 because we have no way of remembering what their purpose was when
3506 - Add even more asserts to hunt down bug 417.
3507 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
3508 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
3509 Add a log message to confirm that it is in fact unlikely.
3511 o Minor bugfixes (controller):
3512 - Make 'getinfo fingerprint' return a 551 error if we're not a
3513 server, so we match what the control spec claims we do. Reported
3515 - Fix a typo in an error message when extendcircuit fails that
3516 caused us to not follow the \r\n-based delimiter protocol. Reported
3519 o Code simplifications and refactoring:
3520 - Stop passing around circuit_t and crypt_path_t pointers that are
3521 implicit in other procedure arguments.
3522 - Drop the old code to choke directory connections when the
3523 corresponding OR connections got full: thanks to the cell queue
3524 feature, OR conns don't get full any more.
3525 - Make dns_resolve() handle attaching connections to circuits
3526 properly, so the caller doesn't have to.
3527 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
3528 - Keep the connection array as a dynamic smartlist_t, rather than as
3529 a fixed-sized array. This is important, as the number of connections
3530 is becoming increasingly decoupled from the number of sockets.
3533 Changes in version 0.1.2.14 - 2007-05-25
3534 Tor 0.1.2.14 changes the addresses of two directory authorities (this
3535 change especially affects those who serve or use hidden services),
3536 and fixes several other crash- and security-related bugs.
3538 o Directory authority changes:
3539 - Two directory authorities (moria1 and moria2) just moved to new
3540 IP addresses. This change will particularly affect those who serve
3541 or use hidden services.
3543 o Major bugfixes (crashes):
3544 - If a directory server runs out of space in the connection table
3545 as it's processing a begin_dir request, it will free the exit stream
3546 but leave it attached to the circuit, leading to unpredictable
3547 behavior. (Reported by seeess, fixes bug 425.)
3548 - Fix a bug in dirserv_remove_invalid() that would cause authorities
3549 to corrupt memory under some really unlikely scenarios.
3550 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
3551 - Avoid segfaults when reading from mmaped descriptor file. (Reported
3554 o Major bugfixes (security):
3555 - When choosing an entry guard for a circuit, avoid using guards
3556 that are in the same family as the chosen exit -- not just guards
3557 that are exactly the chosen exit. (Reported by lodger.)
3559 o Major bugfixes (resource management):
3560 - If a directory authority is down, skip it when deciding where to get
3561 networkstatus objects or descriptors. Otherwise we keep asking
3562 every 10 seconds forever. Fixes bug 384.
3563 - Count it as a failure if we fetch a valid network-status but we
3564 don't want to keep it. Otherwise we'll keep fetching it and keep
3565 not wanting to keep it. Fixes part of bug 422.
3566 - If all of our dirservers have given us bad or no networkstatuses
3567 lately, then stop hammering them once per minute even when we
3568 think they're failed. Fixes another part of bug 422.
3571 - Actually set the purpose correctly for descriptors inserted with
3573 - When we have k non-v2 authorities in our DirServer config,
3574 we ignored the last k authorities in the list when updating our
3576 - Correctly back-off from requesting router descriptors that we are
3577 having a hard time downloading.
3578 - Read resolv.conf files correctly on platforms where read() returns
3579 partial results on small file reads.
3580 - Don't rebuild the entire router store every time we get 32K of
3581 routers: rebuild it when the journal gets very large, or when
3582 the gaps in the store get very large.
3585 - When routers publish SVN revisions in their router descriptors,
3586 authorities now include those versions correctly in networkstatus
3588 - Warn when using a version of libevent before 1.3b to run a server on
3589 OSX or BSD: these versions interact badly with userspace threads.
3592 Changes in version 0.1.2.13 - 2007-04-24
3593 This release features some major anonymity fixes, such as safer path
3594 selection; better client performance; faster bootstrapping, better
3595 address detection, and better DNS support for servers; write limiting as
3596 well as read limiting to make servers easier to run; and a huge pile of
3597 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
3599 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
3600 of the Freenode IRC network, remembering his patience and vision for
3601 free speech on the Internet.
3604 - Fix a memory leak when we ask for "all" networkstatuses and we
3605 get one we don't recognize.
3606 - Add more asserts to hunt down bug 417.
3607 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
3610 Changes in version 0.1.2.12-rc - 2007-03-16
3612 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
3613 directory information requested inside Tor connections (i.e. via
3614 begin_dir cells). It only triggered when the same connection was
3615 serving other data at the same time. Reported by seeess.
3618 - When creating a circuit via the controller, send a 'launched'
3619 event when we're done, so we follow the spec better.
3622 Changes in version 0.1.2.11-rc - 2007-03-15
3623 o Minor bugfixes (controller), reported by daejees:
3624 - Correct the control spec to match how the code actually responds
3625 to 'getinfo addr-mappings/*'.
3626 - The control spec described a GUARDS event, but the code
3627 implemented a GUARD event. Standardize on GUARD, but let people
3631 Changes in version 0.1.2.10-rc - 2007-03-07
3632 o Major bugfixes (Windows):
3633 - Do not load the NT services library functions (which may not exist)
3634 just to detect if we're a service trying to shut down. Now we run
3635 on Win98 and friends again.
3637 o Minor bugfixes (other):
3638 - Clarify a couple of log messages.
3639 - Fix a misleading socks5 error number.
3642 Changes in version 0.1.2.9-rc - 2007-03-02
3643 o Major bugfixes (Windows):
3644 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
3645 of the usual GCC "%llu". This prevents a bug when saving 64-bit
3646 int configuration values: the high-order 32 bits would get
3647 truncated. In particular, we were being bitten by the default
3648 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
3649 and maybe also bug 397.)
3651 o Minor bugfixes (performance):
3652 - Use OpenSSL's AES implementation on platforms where it's faster.
3653 This could save us as much as 10% CPU usage.
3655 o Minor bugfixes (server):
3656 - Do not rotate onion key immediately after setting it for the first
3659 o Minor bugfixes (directory authorities):
3660 - Stop calling servers that have been hibernating for a long time
3661 "stable". Also, stop letting hibernating or obsolete servers affect
3662 uptime and bandwidth cutoffs.
3663 - Stop listing hibernating servers in the v1 directory.
3665 o Minor bugfixes (hidden services):
3666 - Upload hidden service descriptors slightly less often, to reduce
3667 load on authorities.
3669 o Minor bugfixes (other):
3670 - Fix an assert that could trigger if a controller quickly set then
3671 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
3672 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
3674 - Fix a potential race condition in the rpm installer. Found by
3676 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
3677 of 2 as indicating that the server is completely bad; it sometimes
3678 means that the server is just bad for the request in question. (may fix
3679 the last of bug 326.)
3680 - Disable encrypted directory connections when we don't have a server
3681 descriptor for the destination. We'll get this working again in
3685 Changes in version 0.1.2.8-beta - 2007-02-26
3686 o Major bugfixes (crashes):
3687 - Stop crashing when the controller asks us to resetconf more than
3688 one config option at once. (Vidalia 0.0.11 does this.)
3689 - Fix a crash that happened on Win98 when we're given command-line
3690 arguments: don't try to load NT service functions from advapi32.dll
3691 except when we need them. (Bug introduced in 0.1.2.7-alpha;
3693 - Fix a longstanding obscure crash bug that could occur when
3694 we run out of DNS worker processes. (Resolves bug 390.)
3696 o Major bugfixes (hidden services):
3697 - Correctly detect whether hidden service descriptor downloads are
3698 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
3700 o Major bugfixes (accounting):
3701 - When we start during an accounting interval before it's time to wake
3702 up, remember to wake up at the correct time. (May fix bug 342.)
3704 o Minor bugfixes (controller):
3705 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
3706 clear the corresponding on_circuit variable, and remember later
3707 that we don't need to send a redundant CLOSED event. (Resolves part
3709 - Report events where a resolve succeeded or where we got a socks
3710 protocol error correctly, rather than calling both of them
3712 - Change reported stream target addresses to IP consistently when
3713 we finally get the IP from an exit node.
3714 - Send log messages to the controller even if they happen to be very
3717 o Minor bugfixes (other):
3718 - Display correct results when reporting which versions are
3719 recommended, and how recommended they are. (Resolves bug 383.)
3720 - Improve our estimates for directory bandwidth to be less random:
3721 guess that an unrecognized directory will have the average bandwidth
3722 from all known directories, not that it will have the average
3723 bandwidth from those directories earlier than it on the list.
3724 - If we start a server with ClientOnly 1, then set ClientOnly to 0
3725 and hup, stop triggering an assert based on an empty onion_key.
3726 - On platforms with no working mmap() equivalent, don't warn the
3727 user when cached-routers doesn't exist.
3728 - Warn the user when mmap() [or its equivalent] fails for some reason
3729 other than file-not-found.
3730 - Don't warn the user when cached-routers.new doesn't exist: that's
3731 perfectly fine when starting up for the first time.
3732 - When EntryNodes are configured, rebuild the guard list to contain,
3733 in order: the EntryNodes that were guards before; the rest of the
3734 EntryNodes; the nodes that were guards before.
3735 - Mask out all signals in sub-threads; only the libevent signal
3736 handler should be processing them. This should prevent some crashes
3737 on some machines using pthreads. (Patch from coderman.)
3738 - Fix switched arguments on memset in the implementation of
3739 tor_munmap() for systems with no mmap() call.
3740 - When Tor receives a router descriptor that it asked for, but
3741 no longer wants (because it has received fresh networkstatuses
3742 in the meantime), do not warn the user. Cache the descriptor if
3743 we're a cache; drop it if we aren't.
3744 - Make earlier entry guards _really_ get retried when the network
3746 - On a malformed DNS reply, always give an error to the corresponding
3748 - Build with recent libevents on platforms that do not define the
3749 nonstandard types "u_int8_t" and friends.
3751 o Minor features (controller):
3752 - Warn the user when an application uses the obsolete binary v0
3753 control protocol. We're planning to remove support for it during
3754 the next development series, so it's good to give people some
3756 - Add STREAM_BW events to report per-entry-stream bandwidth
3757 use. (Patch from Robert Hogan.)
3758 - Rate-limit SIGNEWNYM signals in response to controllers that
3759 impolitely generate them for every single stream. (Patch from
3760 mwenge; closes bug 394.)
3761 - Make REMAP stream events have a SOURCE (cache or exit), and
3762 make them generated in every case where we get a successful
3763 connected or resolved cell.
3765 o Minor bugfixes (performance):
3766 - Call router_have_min_dir_info half as often. (This is showing up in
3767 some profiles, but not others.)
3768 - When using GCC, make log_debug never get called at all, and its
3769 arguments never get evaluated, when no debug logs are configured.
3770 (This is showing up in some profiles, but not others.)
3773 - Remove some never-implemented options. Mark PathlenCoinWeight as
3775 - Implement proposal 106: Stop requiring clients to have well-formed
3776 certificates; stop checking nicknames in certificates. (Clients
3777 have certificates so that they can look like Tor servers, but in
3778 the future we might want to allow them to look like regular TLS
3779 clients instead. Nicknames in certificates serve no purpose other
3780 than making our protocol easier to recognize on the wire.)
3781 - Revise messages on handshake failure again to be even more clear about
3782 which are incoming connections and which are outgoing.
3783 - Discard any v1 directory info that's over 1 month old (for
3784 directories) or over 1 week old (for running-routers lists).
3785 - Do not warn when individual nodes in the configuration's EntryNodes,
3786 ExitNodes, etc are down: warn only when all possible nodes
3787 are down. (Fixes bug 348.)
3788 - Always remove expired routers and networkstatus docs before checking
3789 whether we have enough information to build circuits. (Fixes
3791 - Put a lower-bound on MaxAdvertisedBandwidth.
3794 Changes in version 0.1.2.7-alpha - 2007-02-06
3795 o Major bugfixes (rate limiting):
3796 - Servers decline directory requests much more aggressively when
3797 they're low on bandwidth. Otherwise they end up queueing more and
3798 more directory responses, which can't be good for latency.
3799 - But never refuse directory requests from local addresses.
3800 - Fix a memory leak when sending a 503 response for a networkstatus
3802 - Be willing to read or write on local connections (e.g. controller
3803 connections) even when the global rate limiting buckets are empty.
3804 - If our system clock jumps back in time, don't publish a negative
3805 uptime in the descriptor. Also, don't let the global rate limiting
3806 buckets go absurdly negative.
3807 - Flush local controller connection buffers periodically as we're
3808 writing to them, so we avoid queueing 4+ megabytes of data before
3811 o Major bugfixes (NT services):
3812 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
3813 command-line flag so that admins can override the default by saying
3814 "tor --service install --user "SomeUser"". This will not affect
3815 existing installed services. Also, warn the user that the service
3816 will look for its configuration file in the service user's
3817 %appdata% directory. (We can't do the 'hardwire the user's appdata
3818 directory' trick any more, since we may not have read access to that
3821 o Major bugfixes (other):
3822 - Previously, we would cache up to 16 old networkstatus documents
3823 indefinitely, if they came from nontrusted authorities. Now we
3824 discard them if they are more than 10 days old.
3825 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
3827 - Detect and reject malformed DNS responses containing circular
3829 - If exits are rare enough that we're not marking exits as guards,
3830 ignore exit bandwidth when we're deciding the required bandwidth
3832 - When we're handling a directory connection tunneled over Tor,
3833 don't fill up internal memory buffers with all the data we want
3834 to tunnel; instead, only add it if the OR connection that will
3835 eventually receive it has some room for it. (This can lead to
3836 slowdowns in tunneled dir connections; a better solution will have
3839 o Minor bugfixes (dns):
3840 - Add some defensive programming to eventdns.c in an attempt to catch
3841 possible memory-stomping bugs.
3842 - Detect and reject DNS replies containing IPv4 or IPv6 records with
3843 an incorrect number of bytes. (Previously, we would ignore the
3845 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
3846 in the correct order, and doesn't crash.
3847 - Free memory held in recently-completed DNS lookup attempts on exit.
3848 This was not a memory leak, but may have been hiding memory leaks.
3849 - Handle TTL values correctly on reverse DNS lookups.
3850 - Treat failure to parse resolv.conf as an error.
3852 o Minor bugfixes (other):
3853 - Fix crash with "tor --list-fingerprint" (reported by seeess).
3854 - When computing clock skew from directory HTTP headers, consider what
3855 time it was when we finished asking for the directory, not what
3857 - Expire socks connections if they spend too long waiting for the
3858 handshake to finish. Previously we would let them sit around for
3859 days, if the connecting application didn't close them either.
3860 - And if the socks handshake hasn't started, don't send a
3861 "DNS resolve socks failed" handshake reply; just close it.
3862 - Stop using C functions that OpenBSD's linker doesn't like.
3863 - Don't launch requests for descriptors unless we have networkstatuses
3864 from at least half of the authorities. This delays the first
3865 download slightly under pathological circumstances, but can prevent
3866 us from downloading a bunch of descriptors we don't need.
3867 - Do not log IPs with TLS failures for incoming TLS
3868 connections. (Fixes bug 382.)
3869 - If the user asks to use invalid exit nodes, be willing to use
3871 - Stop using the reserved ac_cv namespace in our configure script.
3872 - Call stat() slightly less often; use fstat() when possible.
3873 - Refactor the way we handle pending circuits when an OR connection
3874 completes or fails, in an attempt to fix a rare crash bug.
3875 - Only rewrite a conn's address based on X-Forwarded-For: headers
3876 if it's a parseable public IP address; and stop adding extra quotes
3877 to the resulting address.
3880 - Weight directory requests by advertised bandwidth. Now we can
3881 let servers enable write limiting but still allow most clients to
3882 succeed at their directory requests. (We still ignore weights when
3883 choosing a directory authority; I hope this is a feature.)
3886 - Create a new file ReleaseNotes which was the old ChangeLog. The
3887 new ChangeLog file now includes the summaries for all development
3889 - Check for addresses with invalid characters at the exit as well
3890 as at the client, and warn less verbosely when they fail. You can
3891 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
3892 - Adapt a patch from goodell to let the contrib/exitlist script
3893 take arguments rather than require direct editing.
3894 - Inform the server operator when we decide not to advertise a
3895 DirPort due to AccountingMax enabled or a low BandwidthRate. It
3896 was confusing Zax, so now we're hopefully more helpful.
3897 - Bring us one step closer to being able to establish an encrypted
3898 directory tunnel without knowing a descriptor first. Still not
3899 ready yet. As part of the change, now assume we can use a
3900 create_fast cell if we don't know anything about a router.
3901 - Allow exit nodes to use nameservers running on ports other than 53.
3902 - Servers now cache reverse DNS replies.
3903 - Add an --ignore-missing-torrc command-line option so that we can
3904 get the "use sensible defaults if the configuration file doesn't
3905 exist" behavior even when specifying a torrc location on the command
3908 o Minor features (controller):
3909 - Track reasons for OR connection failure; make these reasons
3910 available via the controller interface. (Patch from Mike Perry.)
3911 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
3912 can learn when clients are sending malformed hostnames to Tor.
3913 - Clean up documentation for controller status events.
3914 - Add a REMAP status to stream events to note that a stream's
3915 address has changed because of a cached address or a MapAddress
3919 Changes in version 0.1.2.6-alpha - 2007-01-09
3921 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
3922 connection handles more than 4 gigs in either direction, we crash.
3923 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
3924 advertised exit node, somebody might try to exit from us when
3925 we're bootstrapping and before we've built our descriptor yet.
3926 Refuse the connection rather than crashing.
3929 - Warn if we (as a server) find that we've resolved an address that we
3930 weren't planning to resolve.
3931 - Warn that using select() on any libevent version before 1.1 will be
3932 unnecessarily slow (even for select()).
3933 - Flush ERR-level controller status events just like we currently
3934 flush ERR-level log events, so that a Tor shutdown doesn't prevent
3935 the controller from learning about current events.
3937 o Minor features (more controller status events):
3938 - Implement EXTERNAL_ADDRESS server status event so controllers can
3939 learn when our address changes.
3940 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
3941 can learn when directories reject our descriptor.
3942 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
3943 can learn when a client application is speaking a non-socks protocol
3945 - Implement DANGEROUS_SOCKS client status event so controllers
3946 can learn when a client application is leaking DNS addresses.
3947 - Implement BUG general status event so controllers can learn when
3948 Tor is unhappy about its internal invariants.
3949 - Implement CLOCK_SKEW general status event so controllers can learn
3950 when Tor thinks the system clock is set incorrectly.
3951 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
3952 server status events so controllers can learn when their descriptors
3953 are accepted by a directory.
3954 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
3955 server status events so controllers can learn about Tor's progress in
3956 deciding whether it's reachable from the outside.
3957 - Implement BAD_LIBEVENT general status event so controllers can learn
3958 when we have a version/method combination in libevent that needs to
3960 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
3961 and DNS_USELESS server status events so controllers can learn
3962 about changes to DNS server status.
3964 o Minor features (directory):
3965 - Authorities no longer recommend exits as guards if this would shift
3966 too much load to the exit nodes.
3969 Changes in version 0.1.2.5-alpha - 2007-01-06
3971 - Enable write limiting as well as read limiting. Now we sacrifice
3972 capacity if we're pushing out lots of directory traffic, rather
3973 than overrunning the user's intended bandwidth limits.
3974 - Include TLS overhead when counting bandwidth usage; previously, we
3975 would count only the bytes sent over TLS, but not the bytes used
3977 - Support running the Tor service with a torrc not in the same
3978 directory as tor.exe and default to using the torrc located in
3979 the %appdata%\Tor\ of the user who installed the service. Patch
3981 - Servers now check for the case when common DNS requests are going to
3982 wildcarded addresses (i.e. all getting the same answer), and change
3983 their exit policy to reject *:* if it's happening.
3984 - Implement BEGIN_DIR cells, so we can connect to the directory
3985 server via TLS to do encrypted directory requests rather than
3986 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
3987 config options if you like.
3989 o Minor features (config and docs):
3990 - Start using the state file to store bandwidth accounting data:
3991 the bw_accounting file is now obsolete. We'll keep generating it
3992 for a while for people who are still using 0.1.2.4-alpha.
3993 - Try to batch changes to the state file so that we do as few
3994 disk writes as possible while still storing important things in
3996 - The state file and the bw_accounting file get saved less often when
3997 the AvoidDiskWrites config option is set.
3998 - Make PIDFile work on Windows (untested).
3999 - Add internal descriptions for a bunch of configuration options:
4000 accessible via controller interface and in comments in saved
4002 - Reject *:563 (NNTPS) in the default exit policy. We already reject
4003 NNTP by default, so this seems like a sensible addition.
4004 - Clients now reject hostnames with invalid characters. This should
4005 avoid some inadvertent info leaks. Add an option
4006 AllowNonRFC953Hostnames to disable this behavior, in case somebody
4007 is running a private network with hosts called @, !, and #.
4008 - Add a maintainer script to tell us which options are missing
4009 documentation: "make check-docs".
4010 - Add a new address-spec.txt document to describe our special-case
4011 addresses: .exit, .onion, and .noconnnect.
4013 o Minor features (DNS):
4014 - Ongoing work on eventdns infrastructure: now it has dns server
4015 and ipv6 support. One day Tor will make use of it.
4016 - Add client-side caching for reverse DNS lookups.
4017 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
4018 - When we change nameservers or IP addresses, reset and re-launch
4019 our tests for DNS hijacking.
4021 o Minor features (directory):
4022 - Authorities now specify server versions in networkstatus. This adds
4023 about 2% to the size of compressed networkstatus docs, and allows
4024 clients to tell which servers support BEGIN_DIR and which don't.
4025 The implementation is forward-compatible with a proposed future
4026 protocol version scheme not tied to Tor versions.
4027 - DirServer configuration lines now have an orport= option so
4028 clients can open encrypted tunnels to the authorities without
4029 having downloaded their descriptors yet. Enabled for moria1,
4030 moria2, tor26, and lefkada now in the default configuration.
4031 - Directory servers are more willing to send a 503 "busy" if they
4032 are near their write limit, especially for v1 directory requests.
4033 Now they can use their limited bandwidth for actual Tor traffic.
4034 - Clients track responses with status 503 from dirservers. After a
4035 dirserver has given us a 503, we try not to use it until an hour has
4036 gone by, or until we have no dirservers that haven't given us a 503.
4037 - When we get a 503 from a directory, and we're not a server, we don't
4038 count the failure against the total number of failures allowed
4039 for the thing we're trying to download.
4040 - Report X-Your-Address-Is correctly from tunneled directory
4041 connections; don't report X-Your-Address-Is when it's an internal
4042 address; and never believe reported remote addresses when they're
4044 - Protect against an unlikely DoS attack on directory servers.
4045 - Add a BadDirectory flag to network status docs so that authorities
4046 can (eventually) tell clients about caches they believe to be
4049 o Minor features (controller):
4050 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
4051 - Reimplement GETINFO so that info/names stays in sync with the
4053 - Implement "GETINFO fingerprint".
4054 - Implement "SETEVENTS GUARD" so controllers can get updates on
4055 entry guard status as it changes.
4057 o Minor features (clean up obsolete pieces):
4058 - Remove some options that have been deprecated since at least
4059 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
4060 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
4062 - We no longer look for identity and onion keys in "identity.key" and
4063 "onion.key" -- these were replaced by secret_id_key and
4064 secret_onion_key in 0.0.8pre1.
4065 - We no longer require unrecognized directory entries to be
4068 o Major bugfixes (security):
4069 - Stop sending the HttpProxyAuthenticator string to directory
4070 servers when directory connections are tunnelled through Tor.
4071 - Clients no longer store bandwidth history in the state file.
4072 - Do not log introduction points for hidden services if SafeLogging
4074 - When generating bandwidth history, round down to the nearest
4075 1k. When storing accounting data, round up to the nearest 1k.
4076 - When we're running as a server, remember when we last rotated onion
4077 keys, so that we will rotate keys once they're a week old even if
4078 we never stay up for a week ourselves.
4080 o Major bugfixes (other):
4081 - Fix a longstanding bug in eventdns that prevented the count of
4082 timed-out resolves from ever being reset. This bug caused us to
4083 give up on a nameserver the third time it timed out, and try it
4084 10 seconds later... and to give up on it every time it timed out
4086 - Take out the '5 second' timeout from the connection retry
4087 schedule. Now the first connect attempt will wait a full 10
4088 seconds before switching to a new circuit. Perhaps this will help
4089 a lot. Based on observations from Mike Perry.
4090 - Fix a bug on the Windows implementation of tor_mmap_file() that
4091 would prevent the cached-routers file from ever loading. Reported
4095 - Fix an assert failure when a directory authority sets
4096 AuthDirRejectUnlisted and then receives a descriptor from an
4097 unlisted router. Reported by seeess.
4098 - Avoid a double-free when parsing malformed DirServer lines.
4099 - Fix a bug when a BSD-style PF socket is first used. Patch from
4101 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
4102 to resolve an address at a given exit node even when they ask for
4104 - Servers no longer ever list themselves in their "family" line,
4105 even if configured to do so. This makes it easier to configure
4106 family lists conveniently.
4107 - When running as a server, don't fall back to 127.0.0.1 when no
4108 nameservers are configured in /etc/resolv.conf; instead, make the
4109 user fix resolv.conf or specify nameservers explicitly. (Resolves
4111 - Stop accepting certain malformed ports in configured exit policies.
4112 - Don't re-write the fingerprint file every restart, unless it has
4114 - Stop warning when a single nameserver fails: only warn when _all_ of
4115 our nameservers have failed. Also, when we only have one nameserver,
4116 raise the threshold for deciding that the nameserver is dead.
4117 - Directory authorities now only decide that routers are reachable
4118 if their identity keys are as expected.
4119 - When the user uses bad syntax in the Log config line, stop
4120 suggesting other bad syntax as a replacement.
4121 - Correctly detect ipv6 DNS capability on OpenBSD.
4123 o Minor bugfixes (controller):
4124 - Report the circuit number correctly in STREAM CLOSED events. Bug
4125 reported by Mike Perry.
4126 - Do not report bizarre values for results of accounting GETINFOs
4127 when the last second's write or read exceeds the allotted bandwidth.
4128 - Report "unrecognized key" rather than an empty string when the
4129 controller tries to fetch a networkstatus that doesn't exist.
4132 Changes in version 0.1.1.26 - 2006-12-14
4133 o Security bugfixes:
4134 - Stop sending the HttpProxyAuthenticator string to directory
4135 servers when directory connections are tunnelled through Tor.
4136 - Clients no longer store bandwidth history in the state file.
4137 - Do not log introduction points for hidden services if SafeLogging
4141 - Fix an assert failure when a directory authority sets
4142 AuthDirRejectUnlisted and then receives a descriptor from an
4143 unlisted router (reported by seeess).
4146 Changes in version 0.1.2.4-alpha - 2006-12-03
4148 - Add support for using natd; this allows FreeBSDs earlier than
4149 5.1.2 to have ipfw send connections through Tor without using
4150 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
4153 - Make all connections to addresses of the form ".noconnect"
4154 immediately get closed. This lets application/controller combos
4155 successfully test whether they're talking to the same Tor by
4156 watching for STREAM events.
4157 - Make cross.sh cross-compilation script work even when autogen.sh
4158 hasn't been run. (Patch from Michael Mohr.)
4159 - Statistics dumped by -USR2 now include a breakdown of public key
4160 operations, for profiling.
4163 - Fix a major leak when directory authorities parse their
4164 approved-routers list, a minor memory leak when we fail to pick
4165 an exit node, and a few rare leaks on errors.
4166 - Handle TransPort connections even when the server sends data before
4167 the client sends data. Previously, the connection would just hang
4168 until the client sent data. (Patch from tup based on patch from
4170 - Avoid assert failure when our cached-routers file is empty on
4174 - Don't log spurious warnings when we see a circuit close reason we
4175 don't recognize; it's probably just from a newer version of Tor.
4176 - Have directory authorities allow larger amounts of drift in uptime
4177 without replacing the server descriptor: previously, a server that
4178 restarted every 30 minutes could have 48 "interesting" descriptors
4180 - Start linking to the Tor specification and Tor reference manual
4181 correctly in the Windows installer.
4182 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4183 Tor/Privoxy we also uninstall Vidalia.
4184 - Resume building on Irix64, and fix a lot of warnings from its
4186 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
4187 when we're running as a client.
4190 Changes in version 0.1.1.25 - 2006-11-04
4192 - When a client asks us to resolve (rather than connect to)
4193 an address, and we have a cached answer, give them the cached
4194 answer. Previously, we would give them no answer at all.
4195 - We were building exactly the wrong circuits when we predict
4196 hidden service requirements, meaning Tor would have to build all
4197 its circuits on demand.
4198 - If none of our live entry guards have a high uptime, but we
4199 require a guard with a high uptime, try adding a new guard before
4200 we give up on the requirement. This patch should make long-lived
4201 connections more stable on average.
4202 - When testing reachability of our DirPort, don't launch new
4203 tests when there's already one in progress -- unreachable
4204 servers were stacking up dozens of testing streams.
4206 o Security bugfixes:
4207 - When the user sends a NEWNYM signal, clear the client-side DNS
4208 cache too. Otherwise we continue to act on previous information.
4211 - Avoid a memory corruption bug when creating a hash table for
4213 - Avoid possibility of controller-triggered crash when misusing
4214 certain commands from a v0 controller on platforms that do not
4215 handle printf("%s",NULL) gracefully.
4216 - Avoid infinite loop on unexpected controller input.
4217 - Don't log spurious warnings when we see a circuit close reason we
4218 don't recognize; it's probably just from a newer version of Tor.
4219 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4220 Tor/Privoxy we also uninstall Vidalia.
4223 Changes in version 0.1.2.3-alpha - 2006-10-29
4225 - Prepare for servers to publish descriptors less often: never
4226 discard a descriptor simply for being too old until either it is
4227 recommended by no authorities, or until we get a better one for
4228 the same router. Make caches consider retaining old recommended
4229 routers for even longer.
4230 - If most authorities set a BadExit flag for a server, clients
4231 don't think of it as a general-purpose exit. Clients only consider
4232 authorities that advertise themselves as listing bad exits.
4233 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
4234 headers for content, so that we can work better in the presence of
4235 caching HTTP proxies.
4236 - Allow authorities to list nodes as bad exits by fingerprint or by
4239 o Minor features, controller:
4240 - Add a REASON field to CIRC events; for backward compatibility, this
4241 field is sent only to controllers that have enabled the extended
4242 event format. Also, add additional reason codes to explain why
4243 a given circuit has been destroyed or truncated. (Patches from
4245 - Add a REMOTE_REASON field to extended CIRC events to tell the
4246 controller about why a remote OR told us to close a circuit.
4247 - Stream events also now have REASON and REMOTE_REASON fields,
4248 working much like those for circuit events.
4249 - There's now a GETINFO ns/... field so that controllers can ask Tor
4250 about the current status of a router.
4251 - A new event type "NS" to inform a controller when our opinion of
4252 a router's status has changed.
4253 - Add a GETINFO events/names and GETINFO features/names so controllers
4254 can tell which events and features are supported.
4255 - A new CLEARDNSCACHE signal to allow controllers to clear the
4256 client-side DNS cache without expiring circuits.
4258 o Security bugfixes:
4259 - When the user sends a NEWNYM signal, clear the client-side DNS
4260 cache too. Otherwise we continue to act on previous information.
4263 - Avoid sending junk to controllers or segfaulting when a controller
4264 uses EVENT_NEW_DESC with verbose nicknames.
4265 - Stop triggering asserts if the controller tries to extend hidden
4266 service circuits (reported by mwenge).
4267 - Avoid infinite loop on unexpected controller input.
4268 - When the controller does a "GETINFO network-status", tell it
4269 about even those routers whose descriptors are very old, and use
4270 long nicknames where appropriate.
4271 - Change NT service functions to be loaded on demand. This lets us
4272 build with MinGW without breaking Tor for Windows 98 users.
4273 - Do DirPort reachability tests less often, since a single test
4274 chews through many circuits before giving up.
4275 - In the hidden service example in torrc.sample, stop recommending
4276 esoteric and discouraged hidden service options.
4277 - When stopping an NT service, wait up to 10 sec for it to actually
4278 stop. (Patch from Matt Edman; resolves bug 295.)
4279 - Fix handling of verbose nicknames with ORCONN controller events:
4280 make them show up exactly when requested, rather than exactly when
4282 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
4283 printing a duplicate "$" in the keys we send (reported by mwenge).
4284 - Correctly set maximum connection limit on Cygwin. (This time
4286 - Try to detect Windows correctly when cross-compiling.
4287 - Detect the size of the routers file correctly even if it is
4288 corrupted (on systems without mmap) or not page-aligned (on systems
4289 with mmap). This bug was harmless.
4290 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
4291 to open a stream fails; now we do in more cases. This should
4292 make clients able to find a good exit faster in some cases, since
4293 unhandleable requests will now get an error rather than timing out.
4294 - Resolve two memory leaks when rebuilding the on-disk router cache
4295 (reported by fookoowa).
4296 - Clean up minor code warnings suggested by the MIPSpro C compiler,
4297 and reported by some Centos users.
4298 - Controller signals now work on non-Unix platforms that don't define
4299 SIGUSR1 and SIGUSR2 the way we expect.
4300 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
4301 values before failing, and always enables eventdns.
4302 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
4303 Try to fix this in configure.in by checking for most functions
4304 before we check for libevent.
4307 Changes in version 0.1.2.2-alpha - 2006-10-07
4309 - Make our async eventdns library on-by-default for Tor servers,
4310 and plan to deprecate the separate dnsworker threads.
4311 - Add server-side support for "reverse" DNS lookups (using PTR
4312 records so clients can determine the canonical hostname for a given
4313 IPv4 address). Only supported by servers using eventdns; servers
4314 now announce in their descriptors whether they support eventdns.
4315 - Specify and implement client-side SOCKS5 interface for reverse DNS
4316 lookups (see doc/socks-extensions.txt).
4317 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
4318 connect to directory servers through Tor. Previously, clients needed
4319 to find Tor exits to make private connections to directory servers.
4320 - Avoid choosing Exit nodes for entry or middle hops when the
4321 total bandwidth available from non-Exit nodes is much higher than
4322 the total bandwidth available from Exit nodes.
4323 - Workaround for name servers (like Earthlink's) that hijack failing
4324 DNS requests and replace the no-such-server answer with a "helpful"
4325 redirect to an advertising-driven search portal. Also work around
4326 DNS hijackers who "helpfully" decline to hijack known-invalid
4327 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
4328 lets you turn it off.
4329 - Send out a burst of long-range padding cells once we've established
4330 that we're reachable. Spread them over 4 circuits, so hopefully
4331 a few will be fast. This exercises our bandwidth and bootstraps
4332 us into the directory more quickly.
4334 o New/improved config options:
4335 - Add new config option "ResolvConf" to let the server operator
4336 choose an alternate resolve.conf file when using eventdns.
4337 - Add an "EnforceDistinctSubnets" option to control our "exclude
4338 servers on the same /16" behavior. It's still on by default; this
4339 is mostly for people who want to operate private test networks with
4340 all the machines on the same subnet.
4341 - If one of our entry guards is on the ExcludeNodes list, or the
4342 directory authorities don't think it's a good guard, treat it as
4343 if it were unlisted: stop using it as a guard, and throw it off
4344 the guards list if it stays that way for a long time.
4345 - Allow directory authorities to be marked separately as authorities
4346 for the v1 directory protocol, the v2 directory protocol, and
4347 as hidden service directories, to make it easier to retire old
4348 authorities. V1 authorities should set "HSAuthoritativeDir 1"
4349 to continue being hidden service authorities too.
4350 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
4352 o Minor features, controller:
4353 - Fix CIRC controller events so that controllers can learn the
4354 identity digests of non-Named servers used in circuit paths.
4355 - Let controllers ask for more useful identifiers for servers. Instead
4356 of learning identity digests for un-Named servers and nicknames
4357 for Named servers, the new identifiers include digest, nickname,
4358 and indication of Named status. Off by default; see control-spec.txt
4359 for more information.
4360 - Add a "getinfo address" controller command so it can display Tor's
4361 best guess to the user.
4362 - New controller event to alert the controller when our server
4363 descriptor has changed.
4364 - Give more meaningful errors on controller authentication failure.
4366 o Minor features, other:
4367 - When asked to resolve a hostname, don't use non-exit servers unless
4368 requested to do so. This allows servers with broken DNS to be
4369 useful to the network.
4370 - Divide eventdns log messages into warn and info messages.
4371 - Reserve the nickname "Unnamed" for routers that can't pick
4372 a hostname: any router can call itself Unnamed; directory
4373 authorities will never allocate Unnamed to any particular router;
4374 clients won't believe that any router is the canonical Unnamed.
4375 - Only include function names in log messages for info/debug messages.
4376 For notice/warn/err, the content of the message should be clear on
4377 its own, and printing the function name only confuses users.
4378 - Avoid some false positives during reachability testing: don't try
4379 to test via a server that's on the same /24 as us.
4380 - If we fail to build a circuit to an intended enclave, and it's
4381 not mandatory that we use that enclave, stop wanting it.
4382 - When eventdns is enabled, allow multithreaded builds on NetBSD and
4383 OpenBSD. (We had previously disabled threads on these platforms
4384 because they didn't have working thread-safe resolver functions.)
4386 o Major bugfixes, anonymity/security:
4387 - If a client asked for a server by name, and there's a named server
4388 in our network-status but we don't have its descriptor yet, we
4389 could return an unnamed server instead.
4390 - Fix NetBSD bug that could allow someone to force uninitialized RAM
4391 to be sent to a server's DNS resolver. This only affects NetBSD
4392 and other platforms that do not bounds-check tolower().
4393 - Reject (most) attempts to use Tor circuits with length one. (If
4394 many people start using Tor as a one-hop proxy, exit nodes become
4395 a more attractive target for compromise.)
4396 - Just because your DirPort is open doesn't mean people should be
4397 able to remotely teach you about hidden service descriptors. Now
4398 only accept rendezvous posts if you've got HSAuthoritativeDir set.
4400 o Major bugfixes, other:
4401 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
4402 - When a client asks the server to resolve (not connect to)
4403 an address, and it has a cached answer, give them the cached answer.
4404 Previously, the server would give them no answer at all.
4405 - Allow really slow clients to not hang up five minutes into their
4406 directory downloads (suggested by Adam J. Richter).
4407 - We were building exactly the wrong circuits when we anticipated
4408 hidden service requirements, meaning Tor would have to build all
4409 its circuits on demand.
4410 - Avoid crashing when we mmap a router cache file of size 0.
4411 - When testing reachability of our DirPort, don't launch new
4412 tests when there's already one in progress -- unreachable
4413 servers were stacking up dozens of testing streams.
4415 o Minor bugfixes, correctness:
4416 - If we're a directory mirror and we ask for "all" network status
4417 documents, we would discard status documents from authorities
4419 - Avoid a memory corruption bug when creating a hash table for
4421 - Avoid controller-triggered crash when misusing certain commands
4422 from a v0 controller on platforms that do not handle
4423 printf("%s",NULL) gracefully.
4424 - Don't crash when a controller sends a third argument to an
4425 "extendcircuit" request.
4426 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4427 response; fix error code when "getinfo dir/status/" fails.
4428 - Avoid crash when telling controller stream-status and a stream
4430 - Patch from Adam Langley to fix assert() in eventdns.c.
4431 - Fix a debug log message in eventdns to say "X resolved to Y"
4432 instead of "X resolved to X".
4433 - Make eventdns give strings for DNS errors, not just error numbers.
4434 - Track unreachable entry guards correctly: don't conflate
4435 'unreachable by us right now' with 'listed as down by the directory
4436 authorities'. With the old code, if a guard was unreachable by
4437 us but listed as running, it would clog our guard list forever.
4438 - Behave correctly in case we ever have a network with more than
4439 2GB/s total advertised capacity.
4440 - Make TrackExitHosts case-insensitive, and fix the behavior of
4441 ".suffix" TrackExitHosts items to avoid matching in the middle of
4443 - Finally fix the openssl warnings from newer gccs that believe that
4444 ignoring a return value is okay, but casting a return value and
4445 then ignoring it is a sign of madness.
4446 - Prevent the contrib/exitlist script from printing the same
4447 result more than once.
4448 - Patch from Steve Hildrey: Generate network status correctly on
4449 non-versioning dirservers.
4450 - Don't listen to the X-Your-Address-Is hint if you did the lookup
4451 via Tor; otherwise you'll think you're the exit node's IP address.
4453 o Minor bugfixes, performance:
4454 - Two small performance improvements on parsing descriptors.
4455 - Major performance improvement on inserting descriptors: change
4456 algorithm from O(n^2) to O(n).
4457 - Make the common memory allocation path faster on machines where
4458 malloc(0) returns a pointer.
4459 - Start remembering X-Your-Address-Is directory hints even if you're
4460 a client, so you can become a server more smoothly.
4461 - Avoid duplicate entries on MyFamily line in server descriptor.
4463 o Packaging, features:
4464 - Remove architecture from OS X builds. The official builds are
4465 now universal binaries.
4466 - The Debian package now uses --verify-config when (re)starting,
4467 to distinguish configuration errors from other errors.
4468 - Update RPMs to require libevent 1.1b.
4470 o Packaging, bugfixes:
4471 - Patches so Tor builds with MinGW on Windows.
4472 - Patches so Tor might run on Cygwin again.
4473 - Resume building on non-gcc compilers and ancient gcc. Resume
4474 building with the -O0 compile flag. Resume building cleanly on
4476 - Run correctly on OS X platforms with case-sensitive filesystems.
4477 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
4478 - Add autoconf checks so Tor can build on Solaris x86 again.
4481 - Documented (and renamed) ServerDNSSearchDomains and
4482 ServerDNSResolvConfFile options.
4483 - Be clearer that the *ListenAddress directives can be repeated
4487 Changes in version 0.1.1.24 - 2006-09-29
4489 - Allow really slow clients to not hang up five minutes into their
4490 directory downloads (suggested by Adam J. Richter).
4491 - Fix major performance regression from 0.1.0.x: instead of checking
4492 whether we have enough directory information every time we want to
4493 do something, only check when the directory information has changed.
4494 This should improve client CPU usage by 25-50%.
4495 - Don't crash if, after a server has been running for a while,
4496 it can't resolve its hostname.
4499 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4500 - Don't crash when the controller receives a third argument to an
4501 "extendcircuit" request.
4502 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4503 response; fix error code when "getinfo dir/status/" fails.
4504 - Fix configure.in to not produce broken configure files with
4505 more recent versions of autoconf. Thanks to Clint for his auto*
4507 - Fix security bug on NetBSD that could allow someone to force
4508 uninitialized RAM to be sent to a server's DNS resolver. This
4509 only affects NetBSD and other platforms that do not bounds-check
4511 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
4512 methods: these are known to be buggy.
4513 - If we're a directory mirror and we ask for "all" network status
4514 documents, we would discard status documents from authorities
4518 Changes in version 0.1.2.1-alpha - 2006-08-27
4520 - Add "eventdns" async dns library from Adam Langley, tweaked to
4521 build on OSX and Windows. Only enabled if you pass the
4522 --enable-eventdns argument to configure.
4523 - Allow servers with no hostname or IP address to learn their
4524 IP address by asking the directory authorities. This code only
4525 kicks in when you would normally have exited with a "no address"
4526 error. Nothing's authenticated, so use with care.
4527 - Rather than waiting a fixed amount of time between retrying
4528 application connections, we wait only 5 seconds for the first,
4529 10 seconds for the second, and 15 seconds for each retry after
4530 that. Hopefully this will improve the expected user experience.
4531 - Patch from Tup to add support for transparent AP connections:
4532 this basically bundles the functionality of trans-proxy-tor
4533 into the Tor mainline. Now hosts with compliant pf/netfilter
4534 implementations can redirect TCP connections straight to Tor
4535 without diverting through SOCKS. Needs docs.
4536 - Busy directory servers save lots of memory by spooling server
4537 descriptors, v1 directories, and v2 networkstatus docs to buffers
4538 as needed rather than en masse. Also mmap the cached-routers
4539 files, so we don't need to keep the whole thing in memory too.
4540 - Automatically avoid picking more than one node from the same
4541 /16 network when constructing a circuit.
4542 - Revise and clean up the torrc.sample that we ship with; add
4543 a section for BandwidthRate and BandwidthBurst.
4546 - Split circuit_t into origin_circuit_t and or_circuit_t, and
4547 split connection_t into edge, or, dir, control, and base structs.
4548 These will save quite a bit of memory on busy servers, and they'll
4549 also help us track down bugs in the code and bugs in the spec.
4550 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
4551 or later. Log when we are doing this, so we can diagnose it when
4552 it fails. (Also, recommend libevent 1.1b for kqueue and
4553 win32 methods; deprecate libevent 1.0b harder; make libevent
4554 recommendation system saner.)
4555 - Start being able to build universal binaries on OS X (thanks
4557 - Export the default exit policy via the control port, so controllers
4558 don't need to guess what it is / will be later.
4559 - Add a man page entry for ProtocolWarnings.
4560 - Add TestVia config option to the man page.
4561 - Remove even more protocol-related warnings from Tor server logs,
4562 such as bad TLS handshakes and malformed begin cells.
4563 - Stop fetching descriptors if you're not a dir mirror and you
4564 haven't tried to establish any circuits lately. [This currently
4565 causes some dangerous behavior, because when you start up again
4566 you'll use your ancient server descriptors.]
4567 - New DirPort behavior: if you have your dirport set, you download
4568 descriptors aggressively like a directory mirror, whether or not
4570 - Get rid of the router_retry_connections notion. Now routers
4571 no longer try to rebuild long-term connections to directory
4572 authorities, and directory authorities no longer try to rebuild
4573 long-term connections to all servers. We still don't hang up
4574 connections in these two cases though -- we need to look at it
4575 more carefully to avoid flapping, and we likely need to wait til
4576 0.1.1.x is obsolete.
4577 - Drop compatibility with obsolete Tors that permit create cells
4578 to have the wrong circ_id_type.
4579 - Re-enable per-connection rate limiting. Get rid of the "OP
4580 bandwidth" concept. Lay groundwork for "bandwidth classes" --
4581 separate global buckets that apply depending on what sort of conn
4583 - Start publishing one minute or so after we find our ORPort
4584 to be reachable. This will help reduce the number of descriptors
4585 we have for ourselves floating around, since it's quite likely
4586 other things (e.g. DirPort) will change during that minute too.
4587 - Fork the v1 directory protocol into its own spec document,
4588 and mark dir-spec.txt as the currently correct (v2) spec.
4591 - When we find our DirPort to be reachable, publish a new descriptor
4592 so we'll tell the world (reported by pnx).
4593 - Publish a new descriptor after we hup/reload. This is important
4594 if our config has changed such that we'll want to start advertising
4595 our DirPort now, etc.
4596 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4597 - When we have a state file we cannot parse, tell the user and
4598 move it aside. Now we avoid situations where the user starts
4599 Tor in 1904, Tor writes a state file with that timestamp in it,
4600 the user fixes her clock, and Tor refuses to start.
4601 - Fix configure.in to not produce broken configure files with
4602 more recent versions of autoconf. Thanks to Clint for his auto*
4604 - "tor --verify-config" now exits with -1(255) or 0 depending on
4605 whether the config options are bad or good.
4606 - Resolve bug 321 when using dnsworkers: append a period to every
4607 address we resolve at the exit node, so that we do not accidentally
4608 pick up local addresses, and so that failing searches are retried
4609 in the resolver search domains. (This is already solved for
4610 eventdns.) (This breaks Blossom servers for now.)
4611 - If we are using an exit enclave and we can't connect, e.g. because
4612 its webserver is misconfigured to not listen on localhost, then
4613 back off and try connecting from somewhere else before we fail.
4616 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
4617 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
4618 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
4619 when the IP address is mapped through MapAddress to a hostname.
4620 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
4621 useless IPv6 DNS resolves.
4622 - Patch suggested by Karsten Loesing: respond to SIGNAL command
4623 before we execute the signal, in case the signal shuts us down.
4624 - Clean up AllowInvalidNodes man page entry.
4625 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
4626 - Add more asserts to track down an assert error on a windows Tor
4627 server with connection_add being called with socket == -1.
4628 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
4629 - Fix misleading log messages: an entry guard that is "unlisted",
4630 as well as not known to be "down" (because we've never heard
4631 of it), is not therefore "up".
4632 - Remove code to special-case "-cvs" ending, since it has not
4633 actually mattered since 0.0.9.
4634 - Make our socks5 handling more robust to broken socks clients:
4635 throw out everything waiting on the buffer in between socks
4636 handshake phases, since they can't possibly (so the theory
4637 goes) have predicted what we plan to respond to them.
4640 Changes in version 0.1.1.23 - 2006-07-30
4642 - Fast Tor servers, especially exit nodes, were triggering asserts
4643 due to a bug in handling the list of pending DNS resolves. Some
4644 bugs still remain here; we're hunting them.
4645 - Entry guards could crash clients by sending unexpected input.
4646 - More fixes on reachability testing: if you find yourself reachable,
4647 then don't ever make any client requests (so you stop predicting
4648 circuits), then hup or have your clock jump, then later your IP
4649 changes, you won't think circuits are working, so you won't try to
4650 test reachability, so you won't publish.
4653 - Avoid a crash if the controller does a resetconf firewallports
4654 and then a setconf fascistfirewall=1.
4655 - Avoid an integer underflow when the dir authority decides whether
4656 a router is stable: we might wrongly label it stable, and compute
4657 a slightly wrong median stability, when a descriptor is published
4659 - Fix a place where we might trigger an assert if we can't build our
4660 own server descriptor yet.
4663 Changes in version 0.1.1.22 - 2006-07-05
4665 - Fix a big bug that was causing servers to not find themselves
4666 reachable if they changed IP addresses. Since only 0.1.1.22+
4667 servers can do reachability testing correctly, now we automatically
4668 make sure to test via one of these.
4669 - Fix to allow clients and mirrors to learn directory info from
4670 descriptor downloads that get cut off partway through.
4671 - Directory authorities had a bug in deciding if a newly published
4672 descriptor was novel enough to make everybody want a copy -- a few
4673 servers seem to be publishing new descriptors many times a minute.
4675 - Fix a rare bug that was causing some servers to complain about
4676 "closing wedged cpuworkers" and skip some circuit create requests.
4677 - Make the Exit flag in directory status documents actually work.
4680 Changes in version 0.1.1.21 - 2006-06-10
4681 o Crash and assert fixes from 0.1.1.20:
4682 - Fix a rare crash on Tor servers that have enabled hibernation.
4683 - Fix a seg fault on startup for Tor networks that use only one
4684 directory authority.
4685 - Fix an assert from a race condition that occurs on Tor servers
4686 while exiting, where various threads are trying to log that they're
4687 exiting, and delete the logs, at the same time.
4688 - Make our unit tests pass again on certain obscure platforms.
4691 - Add support for building SUSE RPM packages.
4692 - Speed up initial bootstrapping for clients: if we are making our
4693 first ever connection to any entry guard, then don't mark it down
4695 - When only one Tor server in the network is labelled as a guard,
4696 and we've already picked him, we would cycle endlessly picking him
4697 again, being unhappy about it, etc. Now we specifically exclude
4698 current guards when picking a new guard.
4699 - Servers send create cells more reliably after the TLS connection
4700 is established: we were sometimes forgetting to send half of them
4701 when we had more than one pending.
4702 - If we get a create cell that asks us to extend somewhere, but the
4703 Tor server there doesn't match the expected digest, we now send
4704 a destroy cell back, rather than silently doing nothing.
4705 - Make options->RedirectExit work again.
4706 - Make cookie authentication for the controller work again.
4707 - Stop being picky about unusual characters in the arguments to
4708 mapaddress. It's none of our business.
4709 - Add a new config option "TestVia" that lets you specify preferred
4710 middle hops to use for test circuits. Perhaps this will let me
4711 debug the reachability problems better.
4713 o Log / documentation fixes:
4714 - If we're a server and some peer has a broken TLS certificate, don't
4715 log about it unless ProtocolWarnings is set, i.e., we want to hear
4716 about protocol violations by others.
4717 - Fix spelling of VirtualAddrNetwork in man page.
4718 - Add a better explanation at the top of the autogenerated torrc file
4719 about what happened to our old torrc.
4722 Changes in version 0.1.1.20 - 2006-05-23
4724 - Downgrade a log severity where servers complain that they're
4726 - Avoid a compile warning on FreeBSD.
4727 - Remove string size limit on NEWDESC messages; solve bug 291.
4728 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
4729 more thoroughly when we're running on windows.
4732 Changes in version 0.1.1.19-rc - 2006-05-03
4734 - Regenerate our local descriptor if it's dirty and we try to use
4735 it locally (e.g. if it changes during reachability detection).
4736 - If we setconf our ORPort to 0, we continued to listen on the
4737 old ORPort and receive connections.
4738 - Avoid a second warning about machine/limits.h on Debian
4740 - Be willing to add our own routerinfo into the routerlist.
4741 Now authorities will include themselves in their directories
4742 and network-statuses.
4743 - Stop trying to upload rendezvous descriptors to every
4744 directory authority: only try the v1 authorities.
4745 - Servers no longer complain when they think they're not
4746 registered with the directory authorities. There were too many
4748 - Backport dist-rpm changes so rpms can be built without errors.
4751 - Implement an option, VirtualAddrMask, to set which addresses
4752 get handed out in response to mapaddress requests. This works
4753 around a bug in tsocks where 127.0.0.0/8 is never socksified.
4756 Changes in version 0.1.1.18-rc - 2006-04-10
4758 - Work harder to download live network-statuses from all the
4759 directory authorities we know about. Improve the threshold
4760 decision logic so we're more robust to edge cases.
4761 - When fetching rendezvous descriptors, we were willing to ask
4762 v2 authorities too, which would always return 404.
4765 - Stop listing down or invalid nodes in the v1 directory. This will
4766 reduce its bulk by about 1/3, and reduce load on directory
4768 - When deciding whether a router is Fast or Guard-worthy, consider
4769 his advertised BandwidthRate and not just the BandwidthCapacity.
4770 - No longer ship INSTALL and README files -- they are useless now.
4771 - Force rpmbuild to behave and honor target_cpu.
4772 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
4773 - Start to include translated versions of the tor-doc-*.html
4774 files, along with the screenshots. Still needs more work.
4775 - Start sending back 512 and 451 errors if mapaddress fails,
4776 rather than not sending anything back at all.
4777 - When we fail to bind or listen on an incoming or outgoing
4778 socket, we should close it before failing. otherwise we just
4779 leak it. (thanks to weasel for finding.)
4780 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
4781 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
4782 - Make NoPublish (even though deprecated) work again.
4783 - Fix a minor security flaw where a versioning auth dirserver
4784 could list a recommended version many times in a row to make
4785 clients more convinced that it's recommended.
4786 - Fix crash bug if there are two unregistered servers running
4787 with the same nickname, one of them is down, and you ask for
4788 them by nickname in your EntryNodes or ExitNodes. Also, try
4789 to pick the one that's running rather than an arbitrary one.
4790 - Fix an infinite loop we could hit if we go offline for too long.
4791 - Complain when we hit WSAENOBUFS on recv() or write() too.
4792 Perhaps this will help us hunt the bug.
4793 - If you're not a versioning dirserver, don't put the string
4794 "client-versions \nserver-versions \n" in your network-status.
4795 - Lower the minimum required number of file descriptors to 1000,
4796 so we can have some overhead for Valgrind on Linux, where the
4797 default ulimit -n is 1024.
4800 - Add tor.dizum.com as the fifth authoritative directory server.
4801 - Add a new config option FetchUselessDescriptors, off by default,
4802 for when you plan to run "exitlist" on your client and you want
4803 to know about even the non-running descriptors.
4806 Changes in version 0.1.1.17-rc - 2006-03-28
4808 - Clients and servers since 0.1.1.10-alpha have been expiring
4809 connections whenever they are idle for 5 minutes and they *do*
4810 have circuits on them. Oops. With this new version, clients will
4811 discard their previous entry guard choices and avoid choosing
4812 entry guards running these flawed versions.
4813 - Fix memory leak when uncompressing concatenated zlib streams. This
4814 was causing substantial leaks over time on Tor servers.
4815 - The v1 directory was including servers as much as 48 hours old,
4816 because that's how the new routerlist->routers works. Now only
4817 include them if they're 20 hours old or less.
4820 - Resume building on irix64, netbsd 2.0, etc.
4821 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
4823 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
4824 and it is confusing some users.
4825 - Mirrors stop caching the v1 directory so often.
4826 - Make the max number of old descriptors that a cache will hold
4827 rise with the number of directory authorities, so we can scale.
4828 - Change our win32 uname() hack to be more forgiving about what
4829 win32 versions it thinks it's found.
4832 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
4834 - When the controller's *setconf commands fail, collect an error
4835 message in a string and hand it back to the controller.
4836 - Make the v2 dir's "Fast" flag based on relative capacity, just
4837 like "Stable" is based on median uptime. Name everything in the
4838 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
4839 - Log server fingerprint on startup, so new server operators don't
4840 have to go hunting around their filesystem for it.
4841 - Return a robots.txt on our dirport to discourage google indexing.
4842 - Let the controller ask for GETINFO dir/status/foo so it can ask
4843 directly rather than connecting to the dir port. Only works when
4844 dirport is set for now.
4846 o New config options rather than constants in the code:
4847 - SocksTimeout: How long do we let a socks connection wait
4848 unattached before we fail it?
4849 - CircuitBuildTimeout: Cull non-open circuits that were born
4850 at least this many seconds ago.
4851 - CircuitIdleTimeout: Cull open clean circuits that were born
4852 at least this many seconds ago.
4855 Changes in version 0.1.1.16-rc - 2006-03-18
4856 o Bugfixes on 0.1.1.15-rc:
4857 - Fix assert when the controller asks to attachstream a connect-wait
4858 or resolve-wait stream.
4859 - Now do address rewriting when the controller asks us to attach
4860 to a particular circuit too. This will let Blossom specify
4861 "moria2.exit" without having to learn what moria2's IP address is.
4862 - Make the "tor --verify-config" command-line work again, so people
4863 can automatically check if their torrc will parse.
4864 - Authoritative dirservers no longer require an open connection from
4865 a server to consider him "reachable". We need this change because
4866 when we add new auth dirservers, old servers won't know not to
4868 - Let Tor build on Sun CC again.
4869 - Fix an off-by-one buffer size in dirserv.c that magically never
4870 hit our three authorities but broke sjmurdoch's own tor network.
4871 - If we as a directory mirror don't know of any v1 directory
4872 authorities, then don't try to cache any v1 directories.
4873 - Stop warning about unknown servers in our family when they are
4874 given as hex digests.
4875 - Stop complaining as quickly to the server operator that he
4876 hasn't registered his nickname/key binding.
4877 - Various cleanups so we can add new V2 Auth Dirservers.
4878 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
4879 reflect the updated flags in our v2 dir protocol.
4880 - Resume allowing non-printable characters for exit streams (both
4881 for connecting and for resolving). Now we tolerate applications
4882 that don't follow the RFCs. But continue to block malformed names
4885 o Bugfixes on 0.1.0.x:
4886 - Fix assert bug in close_logs(): when we close and delete logs,
4887 remove them all from the global "logfiles" list.
4888 - Fix minor integer overflow in calculating when we expect to use up
4889 our bandwidth allocation before hibernating.
4890 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
4891 there are multiple SSLs installed with different versions.
4892 - When we try to be a server and Address is not explicitly set and
4893 our hostname resolves to a private IP address, try to use an
4894 interface address if it has a public address. Now Windows machines
4895 that think of themselves as localhost can work by default.
4898 - Let the controller ask for GETINFO dir/server/foo so it can ask
4899 directly rather than connecting to the dir port.
4900 - Let the controller tell us about certain router descriptors
4901 that it doesn't want Tor to use in circuits. Implement
4902 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
4903 - New config option SafeSocks to reject all application connections
4904 using unsafe socks protocols. Defaults to off.
4907 Changes in version 0.1.1.15-rc - 2006-03-11
4908 o Bugfixes and cleanups:
4909 - When we're printing strings from the network, don't try to print
4910 non-printable characters. This protects us against shell escape
4911 sequence exploits, and also against attacks to fool humans into
4912 misreading their logs.
4913 - Fix a bug where Tor would fail to establish any connections if you
4914 left it off for 24 hours and then started it: we were happy with
4915 the obsolete network statuses, but they all referred to router
4916 descriptors that were too old to fetch, so we ended up with no
4917 valid router descriptors.
4918 - Fix a seg fault in the controller's "getinfo orconn-status"
4919 command while listing status on incoming handshaking connections.
4920 Introduce a status name "NEW" for these connections.
4921 - If we get a linelist or linelist_s config option from the torrc
4922 (e.g. ExitPolicy) and it has no value, warn and skip rather than
4923 silently resetting it to its default.
4924 - Don't abandon entry guards until they've been down or gone for
4926 - Cleaner and quieter log messages.
4929 - New controller signal NEWNYM that makes new application requests
4931 - Add a new circuit purpose 'controller' to let the controller ask
4932 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
4933 controller command to let you specify the purpose if you're
4934 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
4935 command to let you change a circuit's purpose after it's been
4937 - Accept "private:*" in routerdesc exit policies; not generated yet
4938 because older Tors do not understand it.
4939 - Add BSD-style contributed startup script "rc.subr" from Peter
4943 Changes in version 0.1.1.14-alpha - 2006-02-20
4944 o Bugfixes on 0.1.1.x:
4945 - Don't die if we ask for a stdout or stderr log (even implicitly)
4946 and we're set to RunAsDaemon -- just warn.
4947 - We still had a few bugs in the OR connection rotation code that
4948 caused directory servers to slowly aggregate connections to other
4949 fast Tor servers. This time for sure!
4950 - Make log entries on Win32 include the name of the function again.
4951 - We were treating a pair of exit policies if they were equal even
4952 if one said accept and the other said reject -- causing us to
4953 not always publish a new descriptor since we thought nothing
4955 - Retry pending server downloads as well as pending networkstatus
4956 downloads when we unexpectedly get a socks request.
4957 - We were ignoring the IS_FAST flag in the directory status,
4958 meaning we were willing to pick trivial-bandwidth nodes for "fast"
4960 - If the controller's SAVECONF command fails (e.g. due to file
4961 permissions), let the controller know that it failed.
4964 - If we're trying to be a Tor server and running Windows 95/98/ME
4965 as a server, explain that we'll likely crash.
4966 - When we're a server, a client asks for an old-style directory,
4967 and our write bucket is empty, don't give it to him. This way
4968 small servers can continue to serve the directory *sometimes*,
4969 without getting overloaded.
4970 - Compress exit policies even more -- look for duplicate lines
4972 - Clients now honor the "guard" flag in the router status when
4973 picking entry guards, rather than looking at is_fast or is_stable.
4974 - Retain unrecognized lines in $DATADIR/state file, so that we can
4975 be forward-compatible.
4976 - Generate 18.0.0.0/8 address policy format in descs when we can;
4977 warn when the mask is not reducible to a bit-prefix.
4978 - Let the user set ControlListenAddress in the torrc. This can be
4979 dangerous, but there are some cases (like a secured LAN) where it
4981 - Split ReachableAddresses into ReachableDirAddresses and
4982 ReachableORAddresses, so we can restrict Dir conns to port 80
4983 and OR conns to port 443.
4984 - Now we can target arch and OS in rpm builds (contributed by
4985 Phobos). Also make the resulting dist-rpm filename match the
4987 - New config options to help controllers: FetchServerDescriptors
4988 and FetchHidServDescriptors for whether to fetch server
4989 info and hidserv info or let the controller do it, and
4990 PublishServerDescriptor and PublishHidServDescriptors.
4991 - Also let the controller set the __AllDirActionsPrivate config
4992 option if you want all directory fetches/publishes to happen via
4993 Tor (it assumes your controller bootstraps your circuits).
4996 Changes in version 0.1.0.17 - 2006-02-17
4997 o Crash bugfixes on 0.1.0.x:
4998 - When servers with a non-zero DirPort came out of hibernation,
4999 sometimes they would trigger an assert.
5001 o Other important bugfixes:
5002 - On platforms that don't have getrlimit (like Windows), we were
5003 artificially constraining ourselves to a max of 1024
5004 connections. Now just assume that we can handle as many as 15000
5005 connections. Hopefully this won't cause other problems.
5007 o Backported features:
5008 - When we're a server, a client asks for an old-style directory,
5009 and our write bucket is empty, don't give it to him. This way
5010 small servers can continue to serve the directory *sometimes*,
5011 without getting overloaded.
5012 - Whenever you get a 503 in response to a directory fetch, try
5013 once more. This will become important once servers start sending
5014 503's whenever they feel busy.
5015 - Fetch a new directory every 120 minutes, not every 40 minutes.
5016 Now that we have hundreds of thousands of users running the old
5017 directory algorithm, it's starting to hurt a lot.
5018 - Bump up the period for forcing a hidden service descriptor upload
5019 from 20 minutes to 1 hour.
5022 Changes in version 0.1.1.13-alpha - 2006-02-09
5023 o Crashes in 0.1.1.x:
5024 - When you tried to setconf ORPort via the controller, Tor would
5025 crash. So people using TorCP to become a server were sad.
5026 - Solve (I hope) the stack-smashing bug that we were seeing on fast
5027 servers. The problem appears to be something do with OpenSSL's
5028 random number generation, or how we call it, or something. Let me
5029 know if the crashes continue.
5030 - Turn crypto hardware acceleration off by default, until we find
5031 somebody smart who can test it for us. (It appears to produce
5032 seg faults in at least some cases.)
5033 - Fix a rare assert error when we've tried all intro points for
5034 a hidden service and we try fetching the service descriptor again:
5035 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
5038 - Fix a major load balance bug: we were round-robining in 16 KB
5039 chunks, and servers with bandwidthrate of 20 KB, while downloading
5040 a 600 KB directory, would starve their other connections. Now we
5041 try to be a bit more fair.
5042 - Dir authorities and mirrors were never expiring the newest
5043 descriptor for each server, causing memory and directory bloat.
5044 - Fix memory-bloating and connection-bloating bug on servers: We
5045 were never closing any connection that had ever had a circuit on
5046 it, because we were checking conn->n_circuits == 0, yet we had a
5047 bug that let it go negative.
5048 - Make Tor work using squid as your http proxy again -- squid
5049 returns an error if you ask for a URL that's too long, and it uses
5050 a really generic error message. Plus, many people are behind a
5051 transparent squid so they don't even realize it.
5052 - On platforms that don't have getrlimit (like Windows), we were
5053 artificially constraining ourselves to a max of 1024
5054 connections. Now just assume that we can handle as many as 15000
5055 connections. Hopefully this won't cause other problems.
5056 - Add a new config option ExitPolicyRejectPrivate which defaults to
5057 1. This means all exit policies will begin with rejecting private
5058 addresses, unless the server operator explicitly turns it off.
5061 - Clients no longer download descriptors for non-running
5063 - Before we add new directory authorities, we should make it
5064 clear that only v1 authorities should receive/publish hidden
5065 service descriptors.
5068 - As soon as we've fetched some more directory info, immediately
5069 try to download more server descriptors. This way we don't have
5070 a 10 second pause during initial bootstrapping.
5071 - Remove even more loud log messages that the server operator can't
5073 - When we're running an obsolete or un-recommended version, make
5074 the log message more clear about what the problem is and what
5075 versions *are* still recommended.
5076 - Provide a more useful warn message when our onion queue gets full:
5077 the CPU is too slow or the exit policy is too liberal.
5078 - Don't warn when we receive a 503 from a dirserver/cache -- this
5079 will pave the way for them being able to refuse if they're busy.
5080 - When we fail to bind a listener, try to provide a more useful
5081 log message: e.g., "Is Tor already running?"
5082 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
5083 Goldberg can prove things about our handshake protocol more
5085 - MaxConn has been obsolete for a while now. Document the ConnLimit
5086 config option, which is a *minimum* number of file descriptors
5087 that must be available else Tor refuses to start.
5088 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
5089 if you log to syslog and want something other than LOG_DAEMON.
5090 - Make dirservers generate a separate "guard" flag to mean,
5091 "would make a good entry guard". Make clients parse it and vote
5092 on it. Not used by clients yet.
5093 - Implement --with-libevent-dir option to ./configure. Also, improve
5094 search techniques to find libevent, and use those for openssl too.
5095 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
5096 - Only start testing reachability once we've established a
5097 circuit. This will make startup on dirservers less noisy.
5098 - Don't try to upload hidden service descriptors until we have
5099 established a circuit.
5100 - Fix the controller's "attachstream 0" command to treat conn like
5101 it just connected, doing address remapping, handling .exit and
5102 .onion idioms, and so on. Now we're more uniform in making sure
5103 that the controller hears about new and closing connections.
5106 Changes in version 0.1.1.12-alpha - 2006-01-11
5107 o Bugfixes on 0.1.1.x:
5108 - The fix to close duplicate server connections was closing all
5109 Tor client connections if they didn't establish a circuit
5110 quickly enough. Oops.
5111 - Fix minor memory issue (double-free) that happened on exit.
5113 o Bugfixes on 0.1.0.x:
5114 - Tor didn't warn when it failed to open a log file.
5117 Changes in version 0.1.1.11-alpha - 2006-01-10
5118 o Crashes in 0.1.1.x:
5119 - Include all the assert/crash fixes from 0.1.0.16.
5120 - If you start Tor and then quit very quickly, there were some
5121 races that tried to free things that weren't allocated yet.
5122 - Fix a rare memory stomp if you're running hidden services.
5123 - Fix segfault when specifying DirServer in config without nickname.
5124 - Fix a seg fault when you finish connecting to a server but at
5125 that moment you dump his server descriptor.
5126 - Extendcircuit and Attachstream controller commands would
5127 assert/crash if you don't give them enough arguments.
5128 - Fix an assert error when we're out of space in the connection_list
5129 and we try to post a hidden service descriptor (reported by weasel).
5130 - If you specify a relative torrc path and you set RunAsDaemon in
5131 your torrc, then it chdir()'s to the new directory. If you HUP,
5132 it tries to load the new torrc location, fails, and exits.
5133 The fix: no longer allow a relative path to torrc using -f.
5136 - Implement "entry guards": automatically choose a handful of entry
5137 nodes and stick with them for all circuits. Only pick new guards
5138 when the ones you have are unsuitable, and if the old guards
5139 become suitable again, switch back. This will increase security
5140 dramatically against certain end-point attacks. The EntryNodes
5141 config option now provides some hints about which entry guards you
5142 want to use most; and StrictEntryNodes means to only use those.
5143 - New directory logic: download by descriptor digest, not by
5144 fingerprint. Caches try to download all listed digests from
5145 authorities; clients try to download "best" digests from caches.
5146 This avoids partitioning and isolating attacks better.
5147 - Make the "stable" router flag in network-status be the median of
5148 the uptimes of running valid servers, and make clients pay
5149 attention to the network-status flags. Thus the cutoff adapts
5150 to the stability of the network as a whole, making IRC, IM, etc
5151 connections more reliable.
5154 - Tor servers with dynamic IP addresses were needing to wait 18
5155 hours before they could start doing reachability testing using
5156 the new IP address and ports. This is because they were using
5157 the internal descriptor to learn what to test, yet they were only
5158 rebuilding the descriptor once they decided they were reachable.
5159 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
5160 to download certain server descriptors, throw them away, and then
5161 fetch them again after 30 minutes. Now mirrors throw away these
5162 server descriptors so clients can't get them.
5163 - We were leaving duplicate connections to other ORs open for a week,
5164 rather than closing them once we detect a duplicate. This only
5165 really affected authdirservers, but it affected them a lot.
5166 - Spread the authdirservers' reachability testing over the entire
5167 testing interval, so we don't try to do 500 TLS's at once every
5171 - If the network is down, and we try to connect to a conn because
5172 we have a circuit in mind, and we timeout (30 seconds) because the
5173 network never answers, we were expiring the circuit, but we weren't
5174 obsoleting the connection or telling the entry_guards functions.
5175 - Some Tor servers process billions of cells per day. These statistics
5176 need to be uint64_t's.
5177 - Check for integer overflows in more places, when adding elements
5178 to smartlists. This could possibly prevent a buffer overflow
5179 on malicious huge inputs. I don't see any, but I haven't looked
5181 - ReachableAddresses kept growing new "reject *:*" lines on every
5183 - When you "setconf log" via the controller, it should remove all
5184 logs. We were automatically adding back in a "log notice stdout".
5185 - Newly bootstrapped Tor networks couldn't establish hidden service
5186 circuits until they had nodes with high uptime. Be more tolerant.
5187 - We were marking servers down when they could not answer every piece
5188 of the directory request we sent them. This was far too harsh.
5189 - Fix the torify (tsocks) config file to not use Tor for localhost
5191 - Directory authorities now go to the proper authority when asking for
5192 a networkstatus, even when they want a compressed one.
5193 - Fix a harmless bug that was causing Tor servers to log
5194 "Got an end because of misc error, but we're not an AP. Closing."
5195 - Authorities were treating their own descriptor changes as cosmetic,
5196 meaning the descriptor available in the network-status and the
5197 descriptor that clients downloaded were different.
5198 - The OS X installer was adding a symlink for tor_resolve but
5199 the binary was called tor-resolve (reported by Thomas Hardly).
5200 - Workaround a problem with some http proxies where they refuse GET
5201 requests that specify "Content-Length: 0" (reported by Adrian).
5202 - Fix wrong log message when you add a "HiddenServiceNodes" config
5203 line without any HiddenServiceDir line (reported by Chris Thomas).
5206 - Write the TorVersion into the state file so we have a prayer of
5207 keeping forward and backward compatibility.
5208 - Revive the FascistFirewall config option rather than eliminating it:
5209 now it's a synonym for ReachableAddresses *:80,*:443.
5210 - Clients choose directory servers from the network status lists,
5211 not from their internal list of router descriptors. Now they can
5212 go to caches directly rather than needing to go to authorities
5214 - Directory authorities ignore router descriptors that have only
5215 cosmetic differences: do this for 0.1.0.x servers now too.
5216 - Add a new flag to network-status indicating whether the server
5217 can answer v2 directory requests too.
5218 - Authdirs now stop whining so loudly about bad descriptors that
5219 they fetch from other dirservers. So when there's a log complaint,
5220 it's for sure from a freshly uploaded descriptor.
5221 - Reduce memory requirements in our structs by changing the order
5223 - There used to be two ways to specify your listening ports in a
5224 server descriptor: on the "router" line and with a separate "ports"
5225 line. Remove support for the "ports" line.
5226 - New config option "AuthDirRejectUnlisted" for auth dirservers as
5227 a panic button: if we get flooded with unusable servers we can
5228 revert to only listing servers in the approved-routers file.
5229 - Auth dir servers can now mark a fingerprint as "!reject" or
5230 "!invalid" in the approved-routers file (as its nickname), to
5231 refuse descriptors outright or include them but marked as invalid.
5232 - Servers store bandwidth history across restarts/crashes.
5233 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
5234 get a better idea of why their circuits failed. Not used yet.
5235 - Directory mirrors now cache up to 16 unrecognized network-status
5236 docs. Now we can add new authdirservers and they'll be cached too.
5237 - When picking a random directory, prefer non-authorities if any
5239 - New controller option "getinfo desc/all-recent" to fetch the
5240 latest server descriptor for every router that Tor knows about.
5243 Changes in version 0.1.0.16 - 2006-01-02
5244 o Crash bugfixes on 0.1.0.x:
5245 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5246 corrupting the heap, losing FDs, or crashing when we need to resize
5247 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5248 - It turns out sparc64 platforms crash on unaligned memory access
5249 too -- so detect and avoid this.
5250 - Handle truncated compressed data correctly (by detecting it and
5252 - Fix possible-but-unlikely free(NULL) in control.c.
5253 - When we were closing connections, there was a rare case that
5254 stomped on memory, triggering seg faults and asserts.
5255 - Avoid potential infinite recursion when building a descriptor. (We
5256 don't know that it ever happened, but better to fix it anyway.)
5257 - We were neglecting to unlink marked circuits from soon-to-close OR
5258 connections, which caused some rare scribbling on freed memory.
5259 - Fix a memory stomping race bug when closing the joining point of two
5260 rendezvous circuits.
5261 - Fix an assert in time parsing found by Steven Murdoch.
5263 o Other bugfixes on 0.1.0.x:
5264 - When we're doing reachability testing, provide more useful log
5265 messages so the operator knows what to expect.
5266 - Do not check whether DirPort is reachable when we are suppressing
5267 advertising it because of hibernation.
5268 - When building with -static or on Solaris, we sometimes needed -ldl.
5269 - When we're deciding whether a stream has enough circuits around
5270 that can handle it, count the freshly dirty ones and not the ones
5271 that are so dirty they won't be able to handle it.
5272 - When we're expiring old circuits, we had a logic error that caused
5273 us to close new rendezvous circuits rather than old ones.
5274 - Give a more helpful log message when you try to change ORPort via
5275 the controller: you should upgrade Tor if you want that to work.
5276 - We were failing to parse Tor versions that start with "Tor ".
5277 - Tolerate faulty streams better: when a stream fails for reason
5278 exitpolicy, stop assuming that the router is lying about his exit
5279 policy. When a stream fails for reason misc, allow it to retry just
5280 as if it was resolvefailed. When a stream has failed three times,
5281 reset its failure count so we can try again and get all three tries.
5284 Changes in version 0.1.1.10-alpha - 2005-12-11
5285 o Correctness bugfixes on 0.1.0.x:
5286 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5287 corrupting the heap, losing FDs, or crashing when we need to resize
5288 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5289 - Stop doing the complex voodoo overkill checking for insecure
5290 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
5291 - When we were closing connections, there was a rare case that
5292 stomped on memory, triggering seg faults and asserts.
5293 - We were neglecting to unlink marked circuits from soon-to-close OR
5294 connections, which caused some rare scribbling on freed memory.
5295 - When we're deciding whether a stream has enough circuits around
5296 that can handle it, count the freshly dirty ones and not the ones
5297 that are so dirty they won't be able to handle it.
5298 - Recover better from TCP connections to Tor servers that are
5299 broken but don't tell you (it happens!); and rotate TLS
5300 connections once a week.
5301 - When we're expiring old circuits, we had a logic error that caused
5302 us to close new rendezvous circuits rather than old ones.
5303 - Fix a scary-looking but apparently harmless bug where circuits
5304 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
5305 servers, and never switch to state CIRCUIT_STATE_OPEN.
5306 - When building with -static or on Solaris, we sometimes needed to
5308 - Give a useful message when people run Tor as the wrong user,
5309 rather than telling them to start chowning random directories.
5310 - We were failing to inform the controller about new .onion streams.
5312 o Security bugfixes on 0.1.0.x:
5313 - Refuse server descriptors if the fingerprint line doesn't match
5314 the included identity key. Tor doesn't care, but other apps (and
5315 humans) might actually be trusting the fingerprint line.
5316 - We used to kill the circuit when we receive a relay command we
5317 don't recognize. Now we just drop it.
5318 - Start obeying our firewall options more rigorously:
5319 . If we can't get to a dirserver directly, try going via Tor.
5320 . Don't ever try to connect (as a client) to a place our
5321 firewall options forbid.
5322 . If we specify a proxy and also firewall options, obey the
5323 firewall options even when we're using the proxy: some proxies
5324 can only proxy to certain destinations.
5325 - Fix a bug found by Lasse Overlier: when we were making internal
5326 circuits (intended to be cannibalized later for rendezvous and
5327 introduction circuits), we were picking them so that they had
5328 useful exit nodes. There was no need for this, and it actually
5329 aids some statistical attacks.
5330 - Start treating internal circuits and exit circuits separately.
5331 It's important to keep them separate because internal circuits
5332 have their last hops picked like middle hops, rather than like
5333 exit hops. So exiting on them will break the user's expectations.
5335 o Bugfixes on 0.1.1.x:
5336 - Take out the mis-feature where we tried to detect IP address
5337 flapping for people with DynDNS, and chose not to upload a new
5338 server descriptor sometimes.
5339 - Try to be compatible with OpenSSL 0.9.6 again.
5340 - Log fix: when the controller is logging about .onion addresses,
5341 sometimes it didn't include the ".onion" part of the address.
5342 - Don't try to modify options->DirServers internally -- if the
5343 user didn't specify any, just add the default ones directly to
5344 the trusted dirserver list. This fixes a bug where people running
5345 controllers would use SETCONF on some totally unrelated config
5346 option, and Tor would start yelling at them about changing their
5348 - Let the controller's redirectstream command specify a port, in
5349 case the controller wants to change that too.
5350 - When we requested a pile of server descriptors, we sometimes
5351 accidentally launched a duplicate request for the first one.
5352 - Bugfix for trackhostexits: write down the fingerprint of the
5353 chosen exit, not its nickname, because the chosen exit might not
5355 - When parsing foo.exit, if foo is unknown, and we are leaving
5356 circuits unattached, set the chosen_exit field and leave the
5357 address empty. This matters because controllers got confused
5359 - Directory authorities no longer try to download server
5360 descriptors that they know they will reject.
5362 o Features and updates:
5363 - Replace balanced trees with hash tables: this should make stuff
5364 significantly faster.
5365 - Resume using the AES counter-mode implementation that we ship,
5366 rather than OpenSSL's. Ours is significantly faster.
5367 - Many other CPU and memory improvements.
5368 - Add a new config option FastFirstHopPK (on by default) so clients
5369 do a trivial crypto handshake for their first hop, since TLS has
5370 already taken care of confidentiality and authentication.
5371 - Add a new config option TestSocks so people can see if their
5372 applications are using socks4, socks4a, socks5-with-ip, or
5373 socks5-with-hostname. This way they don't have to keep mucking
5374 with tcpdump and wondering if something got cached somewhere.
5375 - Warn when listening on a public address for socks. I suspect a
5376 lot of people are setting themselves up as open socks proxies,
5377 and they have no idea that jerks on the Internet are using them,
5378 since they simply proxy the traffic into the Tor network.
5379 - Add "private:*" as an alias in configuration for policies. Now
5380 you can simplify your exit policy rather than needing to list
5381 every single internal or nonroutable network space.
5382 - Add a new controller event type that allows controllers to get
5383 all server descriptors that were uploaded to a router in its role
5384 as authoritative dirserver.
5385 - Start shipping socks-extensions.txt, tor-doc-unix.html,
5386 tor-doc-server.html, and stylesheet.css in the tarball.
5387 - Stop shipping tor-doc.html in the tarball.
5390 Changes in version 0.1.1.9-alpha - 2005-11-15
5391 o Usability improvements:
5392 - Start calling it FooListenAddress rather than FooBindAddress,
5393 since few of our users know what it means to bind an address
5395 - Reduce clutter in server logs. We're going to try to make
5396 them actually usable now. New config option ProtocolWarnings that
5397 lets you hear about how _other Tors_ are breaking the protocol. Off
5399 - Divide log messages into logging domains. Once we put some sort
5400 of interface on this, it will let people looking at more verbose
5401 log levels specify the topics they want to hear more about.
5402 - Make directory servers return better http 404 error messages
5403 instead of a generic "Servers unavailable".
5404 - Check for even more Windows version flags when writing the platform
5405 string in server descriptors, and note any we don't recognize.
5406 - Clean up more of the OpenSSL memory when exiting, so we can detect
5407 memory leaks better.
5408 - Make directory authorities be non-versioning, non-naming by
5409 default. Now we can add new directory servers without requiring
5410 their operators to pay close attention.
5411 - When logging via syslog, include the pid whenever we provide
5412 a log entry. Suggested by Todd Fries.
5414 o Performance improvements:
5415 - Directory servers now silently throw away new descriptors that
5416 haven't changed much if the timestamps are similar. We do this to
5417 tolerate older Tor servers that upload a new descriptor every 15
5418 minutes. (It seemed like a good idea at the time.)
5419 - Inline bottleneck smartlist functions; use fast versions by default.
5420 - Add a "Map from digest to void*" abstraction digestmap_t so we
5421 can do less hex encoding/decoding. Use it in router_get_by_digest()
5422 to resolve a performance bottleneck.
5423 - Allow tor_gzip_uncompress to extract as much as possible from
5424 truncated compressed data. Try to extract as many
5425 descriptors as possible from truncated http responses (when
5426 DIR_PURPOSE_FETCH_ROUTERDESC).
5427 - Make circ->onionskin a pointer, not a static array. moria2 was using
5428 125000 circuit_t's after it had been up for a few weeks, which
5429 translates to 20+ megs of wasted space.
5430 - The private half of our EDH handshake keys are now chosen out
5431 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
5433 o Security improvements:
5434 - Start making directory caches retain old routerinfos, so soon
5435 clients can start asking by digest of descriptor rather than by
5436 fingerprint of server.
5437 - Add half our entropy from RAND_poll in OpenSSL. This knows how
5438 to use egd (if present), openbsd weirdness (if present), vms/os2
5439 weirdness (if we ever port there), and more in the future.
5441 o Bugfixes on 0.1.0.x:
5442 - Do round-robin writes of at most 16 kB per write. This might be
5443 more fair on loaded Tor servers, and it might resolve our Windows
5444 crash bug. It might also slow things down.
5445 - Our TLS handshakes were generating a single public/private
5446 keypair for the TLS context, rather than making a new one for
5447 each new connections. Oops. (But we were still rotating them
5448 periodically, so it's not so bad.)
5449 - When we were cannibalizing a circuit with a particular exit
5450 node in mind, we weren't checking to see if that exit node was
5451 already present earlier in the circuit. Oops.
5452 - When a Tor server's IP changes (e.g. from a dyndns address),
5453 upload a new descriptor so clients will learn too.
5454 - Really busy servers were keeping enough circuits open on stable
5455 connections that they were wrapping around the circuit_id
5456 space. (It's only two bytes.) This exposed a bug where we would
5457 feel free to reuse a circuit_id even if it still exists but has
5458 been marked for close. Try to fix this bug. Some bug remains.
5459 - If we would close a stream early (e.g. it asks for a .exit that
5460 we know would refuse it) but the LeaveStreamsUnattached config
5461 option is set by the controller, then don't close it.
5463 o Bugfixes on 0.1.1.8-alpha:
5464 - Fix a big pile of memory leaks, some of them serious.
5465 - Do not try to download a routerdesc if we would immediately reject
5467 - Resume inserting a newline between all router descriptors when
5468 generating (old style) signed directories, since our spec says
5470 - When providing content-type application/octet-stream for
5471 server descriptors using .z, we were leaving out the
5472 content-encoding header. Oops. (Everything tolerated this just
5473 fine, but that doesn't mean we need to be part of the problem.)
5474 - Fix a potential seg fault in getconf and getinfo using version 1
5475 of the controller protocol.
5476 - Avoid crash: do not check whether DirPort is reachable when we
5477 are suppressing it because of hibernation.
5478 - Make --hash-password not crash on exit.
5481 Changes in version 0.1.1.8-alpha - 2005-10-07
5482 o New features (major):
5483 - Clients don't download or use the directory anymore. Now they
5484 download and use network-statuses from the trusted dirservers,
5485 and fetch individual server descriptors as needed from mirrors.
5486 See dir-spec.txt for all the gory details.
5487 - Be more conservative about whether to advertise our DirPort.
5488 The main change is to not advertise if we're running at capacity
5489 and either a) we could hibernate or b) our capacity is low and
5490 we're using a default DirPort.
5491 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
5493 o New features (minor):
5494 - Try to be smart about when to retry network-status and
5495 server-descriptor fetches. Still needs some tuning.
5496 - Stop parsing, storing, or using running-routers output (but
5497 mirrors still cache and serve it).
5498 - Consider a threshold of versioning dirservers (dirservers who have
5499 an opinion about which Tor versions are still recommended) before
5500 deciding whether to warn the user that he's obsolete.
5501 - Dirservers can now reject/invalidate by key and IP, with the
5502 config options "AuthDirInvalid" and "AuthDirReject". This is
5503 useful since currently we automatically list servers as running
5504 and usable even if we know they're jerks.
5505 - Provide dire warnings to any users who set DirServer; move it out
5506 of torrc.sample and into torrc.complete.
5507 - Add MyFamily to torrc.sample in the server section.
5508 - Add nicknames to the DirServer line, so we can refer to them
5509 without requiring all our users to memorize their IP addresses.
5510 - When we get an EOF or a timeout on a directory connection, note
5511 how many bytes of serverdesc we are dropping. This will help
5512 us determine whether it is smart to parse incomplete serverdesc
5514 - Add a new function to "change pseudonyms" -- that is, to stop
5515 using any currently-dirty circuits for new streams, so we don't
5516 link new actions to old actions. Currently it's only called on
5517 HUP (or SIGNAL RELOAD).
5518 - On sighup, if UseHelperNodes changed to 1, use new circuits.
5519 - Start using RAND_bytes rather than RAND_pseudo_bytes from
5520 OpenSSL. Also, reseed our entropy every hour, not just at
5521 startup. And entropy in 512-bit chunks, not 160-bit chunks.
5523 o Fixes on 0.1.1.7-alpha:
5524 - Nobody ever implemented EVENT_ADDRMAP for control protocol
5525 version 0, so don't let version 0 controllers ask for it.
5526 - If you requested something with too many newlines via the
5527 v1 controller protocol, you could crash tor.
5528 - Fix a number of memory leaks, including some pretty serious ones.
5529 - Re-enable DirPort testing again, so Tor servers will be willing
5530 to advertise their DirPort if it's reachable.
5531 - On TLS handshake, only check the other router's nickname against
5532 its expected nickname if is_named is set.
5534 o Fixes forward-ported from 0.1.0.15:
5535 - Don't crash when we don't have any spare file descriptors and we
5536 try to spawn a dns or cpu worker.
5537 - Make the numbers in read-history and write-history into uint64s,
5538 so they don't overflow and publish negatives in the descriptor.
5541 - For the OS X package's modified privoxy config file, comment
5542 out the "logfile" line so we don't log everything passed
5544 - We were whining about using socks4 or socks5-with-local-lookup
5545 even when it's an IP in the "virtual" range we designed exactly
5547 - We were leaking some memory every time the client changes IPs.
5548 - Never call free() on tor_malloc()d memory. This will help us
5549 use dmalloc to detect memory leaks.
5550 - Check for named servers when looking them up by nickname;
5551 warn when we'recalling a non-named server by its nickname;
5552 don't warn twice about the same name.
5553 - Try to list MyFamily elements by key, not by nickname, and warn
5554 if we've not heard of the server.
5555 - Make windows platform detection (uname equivalent) smarter.
5556 - It turns out sparc64 doesn't like unaligned access either.
5559 Changes in version 0.1.0.15 - 2005-09-23
5560 o Bugfixes on 0.1.0.x:
5561 - Reject ports 465 and 587 (spam targets) in default exit policy.
5562 - Don't crash when we don't have any spare file descriptors and we
5563 try to spawn a dns or cpu worker.
5564 - Get rid of IgnoreVersion undocumented config option, and make us
5565 only warn, never exit, when we're running an obsolete version.
5566 - Don't try to print a null string when your server finds itself to
5567 be unreachable and the Address config option is empty.
5568 - Make the numbers in read-history and write-history into uint64s,
5569 so they don't overflow and publish negatives in the descriptor.
5570 - Fix a minor memory leak in smartlist_string_remove().
5571 - We were only allowing ourselves to upload a server descriptor at
5572 most every 20 minutes, even if it changed earlier than that.
5573 - Clean up log entries that pointed to old URLs.
5576 Changes in version 0.1.1.7-alpha - 2005-09-14
5577 o Fixes on 0.1.1.6-alpha:
5578 - Exit servers were crashing when people asked them to make a
5579 connection to an address not in their exit policy.
5580 - Looking up a non-existent stream for a v1 control connection would
5582 - Fix a seg fault if we ask a dirserver for a descriptor by
5583 fingerprint but he doesn't know about him.
5584 - SETCONF was appending items to linelists, not clearing them.
5585 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
5586 out and refuse the setconf if it would fail.
5587 - Downgrade the dirserver log messages when whining about
5591 - Add Peter Palfrader's check-tor script to tor/contrib/
5592 It lets you easily check whether a given server (referenced by
5593 nickname) is reachable by you.
5594 - Numerous changes to move towards client-side v2 directories. Not
5598 - If the user gave tor an odd number of command-line arguments,
5599 we were silently ignoring the last one. Now we complain and fail.
5600 [This wins the oldest-bug prize -- this bug has been present since
5601 November 2002, as released in Tor 0.0.0.]
5602 - Do not use unaligned memory access on alpha, mips, or mipsel.
5603 It *works*, but is very slow, so we treat them as if it doesn't.
5604 - Retry directory requests if we fail to get an answer we like
5605 from a given dirserver (we were retrying before, but only if
5606 we fail to connect).
5607 - When writing the RecommendedVersions line, sort them first.
5608 - When the client asked for a rendezvous port that the hidden
5609 service didn't want to provide, we were sending an IP address
5610 back along with the end cell. Fortunately, it was zero. But stop
5612 - Correct "your server is reachable" log entries to indicate that
5613 it was self-testing that told us so.
5616 Changes in version 0.1.1.6-alpha - 2005-09-09
5617 o Fixes on 0.1.1.5-alpha:
5618 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
5619 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
5620 - Fix bug with tor_memmem finding a match at the end of the string.
5621 - Make unit tests run without segfaulting.
5622 - Resolve some solaris x86 compile warnings.
5623 - Handle duplicate lines in approved-routers files without warning.
5624 - Fix bug where as soon as a server refused any requests due to his
5625 exit policy (e.g. when we ask for localhost and he tells us that's
5626 127.0.0.1 and he won't do it), we decided he wasn't obeying his
5627 exit policy using him for any exits.
5628 - Only do openssl hardware accelerator stuff if openssl version is
5631 o New controller features/fixes:
5632 - Add a "RESETCONF" command so you can set config options like
5633 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
5634 a config option in the torrc with no value, then it clears it
5635 entirely (rather than setting it to its default).
5636 - Add a "GETINFO config-file" to tell us where torrc is.
5637 - Avoid sending blank lines when GETINFO replies should be empty.
5638 - Add a QUIT command for the controller (for using it manually).
5639 - Fix a bug in SAVECONF that was adding default dirservers and
5640 other redundant entries to the torrc file.
5642 o Start on the new directory design:
5643 - Generate, publish, cache, serve new network-status format.
5644 - Publish individual descriptors (by fingerprint, by "all", and by
5646 - Publish client and server recommended versions separately.
5647 - Allow tor_gzip_uncompress() to handle multiple concatenated
5648 compressed strings. Serve compressed groups of router
5649 descriptors. The compression logic here could be more
5651 - Distinguish v1 authorities (all currently trusted directories)
5652 from v2 authorities (all trusted directories).
5653 - Change DirServers config line to note which dirs are v1 authorities.
5654 - Add configuration option "V1AuthoritativeDirectory 1" which
5655 moria1, moria2, and tor26 should set.
5656 - Remove option when getting directory cache to see whether they
5657 support running-routers; they all do now. Replace it with one
5658 to see whether caches support v2 stuff.
5661 - Dirservers now do their own external reachability testing of each
5662 Tor server, and only list them as running if they've been found to
5663 be reachable. We also send back warnings to the server's logs if
5664 it uploads a descriptor that we already believe is unreachable.
5665 - Implement exit enclaves: if we know an IP address for the
5666 destination, and there's a running Tor server at that address
5667 which allows exit to the destination, then extend the circuit to
5668 that exit first. This provides end-to-end encryption and end-to-end
5669 authentication. Also, if the user wants a .exit address or enclave,
5670 use 4 hops rather than 3, and cannibalize a general circ for it
5672 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
5673 controller. Also, rotate dns and cpu workers if the controller
5674 changes options that will affect them; and initialize the dns
5675 worker cache tree whether or not we start out as a server.
5676 - Only upload a new server descriptor when options change, 18
5677 hours have passed, uptime is reset, or bandwidth changes a lot.
5678 - Check [X-]Forwarded-For headers in HTTP requests when generating
5679 log messages. This lets people run dirservers (and caches) behind
5680 Apache but still know which IP addresses are causing warnings.
5682 o Config option changes:
5683 - Replace (Fascist)Firewall* config options with a new
5684 ReachableAddresses option that understands address policies.
5685 For example, "ReachableAddresses *:80,*:443"
5686 - Get rid of IgnoreVersion undocumented config option, and make us
5687 only warn, never exit, when we're running an obsolete version.
5688 - Make MonthlyAccountingStart config option truly obsolete now.
5691 - Reject ports 465 and 587 in the default exit policy, since
5692 people have started using them for spam too.
5693 - It turns out we couldn't bootstrap a network since we added
5694 reachability detection in 0.1.0.1-rc. Good thing the Tor network
5695 has never gone down. Add an AssumeReachable config option to let
5696 servers and dirservers bootstrap. When we're trying to build a
5697 high-uptime or high-bandwidth circuit but there aren't enough
5698 suitable servers, try being less picky rather than simply failing.
5699 - Our logic to decide if the OR we connected to was the right guy
5700 was brittle and maybe open to a mitm for unverified routers.
5701 - We weren't cannibalizing circuits correctly for
5702 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
5703 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
5704 build those from scratch. This should make hidden services faster.
5705 - Predict required circuits better, with an eye toward making hidden
5706 services faster on the service end.
5707 - Retry streams if the exit node sends back a 'misc' failure. This
5708 should result in fewer random failures. Also, after failing
5709 from resolve failed or misc, reset the num failures, so we give
5710 it a fair shake next time we try.
5711 - Clean up the rendezvous warn log msgs, and downgrade some to info.
5712 - Reduce severity on logs about dns worker spawning and culling.
5713 - When we're shutting down and we do something like try to post a
5714 server descriptor or rendezvous descriptor, don't complain that
5715 we seem to be unreachable. Of course we are, we're shutting down.
5716 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
5717 We don't use them yet, but maybe one day our DNS resolver will be
5718 able to discover them.
5719 - Make ContactInfo mandatory for authoritative directory servers.
5720 - Require server descriptors to list IPv4 addresses -- hostnames
5721 are no longer allowed. This also fixes some potential security
5722 problems with people providing hostnames as their address and then
5723 preferentially resolving them to partition users.
5724 - Change log line for unreachability to explicitly suggest /etc/hosts
5725 as the culprit. Also make it clearer what IP address and ports we're
5726 testing for reachability.
5727 - Put quotes around user-supplied strings when logging so users are
5728 more likely to realize if they add bad characters (like quotes)
5730 - Let auth dir servers start without specifying an Address config
5732 - Make unit tests (and other invocations that aren't the real Tor)
5733 run without launching listeners, creating subdirectories, and so on.
5736 Changes in version 0.1.1.5-alpha - 2005-08-08
5737 o Bugfixes included in 0.1.0.14.
5739 o Bugfixes on 0.1.0.x:
5740 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
5741 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
5742 it would silently using ignore the 6668.
5745 Changes in version 0.1.0.14 - 2005-08-08
5746 o Bugfixes on 0.1.0.x:
5747 - Fix the other half of the bug with crypto handshakes
5749 - Fix an assert trigger if you send a 'signal term' via the
5750 controller when it's listening for 'event info' messages.
5753 Changes in version 0.1.1.4-alpha - 2005-08-04
5754 o Bugfixes included in 0.1.0.13.
5757 - Improve tor_gettimeofday() granularity on windows.
5758 - Make clients regenerate their keys when their IP address changes.
5759 - Implement some more GETINFO goodness: expose helper nodes, config
5760 options, getinfo keys.
5763 Changes in version 0.1.0.13 - 2005-08-04
5764 o Bugfixes on 0.1.0.x:
5765 - Fix a critical bug in the security of our crypto handshakes.
5766 - Fix a size_t underflow in smartlist_join_strings2() that made
5767 it do bad things when you hand it an empty smartlist.
5768 - Fix Windows installer to ship Tor license (thanks to Aphex for
5769 pointing out this oversight) and put a link to the doc directory
5771 - Explicitly set no-unaligned-access for sparc: it turns out the
5772 new gcc's let you compile broken code, but that doesn't make it
5776 Changes in version 0.1.1.3-alpha - 2005-07-23
5777 o Bugfixes on 0.1.1.2-alpha:
5778 - Fix a bug in handling the controller's "post descriptor"
5780 - Fix several bugs in handling the controller's "extend circuit"
5782 - Fix a bug in handling the controller's "stream status" event.
5783 - Fix an assert failure if we have a controller listening for
5784 circuit events and we go offline.
5785 - Re-allow hidden service descriptors to publish 0 intro points.
5786 - Fix a crash when generating your hidden service descriptor if
5787 you don't have enough intro points already.
5789 o New features on 0.1.1.2-alpha:
5790 - New controller function "getinfo accounting", to ask how
5791 many bytes we've used in this time period.
5792 - Experimental support for helper nodes: a lot of the risk from
5793 a small static adversary comes because users pick new random
5794 nodes every time they rebuild a circuit. Now users will try to
5795 stick to the same small set of entry nodes if they can. Not
5796 enabled by default yet.
5798 o Bugfixes on 0.1.0.12:
5799 - If you're an auth dir server, always publish your dirport,
5800 even if you haven't yet found yourself to be reachable.
5801 - Fix a size_t underflow in smartlist_join_strings2() that made
5802 it do bad things when you hand it an empty smartlist.
5805 Changes in version 0.1.0.12 - 2005-07-18
5806 o New directory servers:
5807 - tor26 has changed IP address.
5809 o Bugfixes on 0.1.0.x:
5810 - Fix a possible double-free in tor_gzip_uncompress().
5811 - When --disable-threads is set, do not search for or link against
5813 - Don't trigger an assert if an authoritative directory server
5814 claims its dirport is 0.
5815 - Fix bug with removing Tor as an NT service: some people were
5816 getting "The service did not return an error." Thanks to Matt
5820 Changes in version 0.1.1.2-alpha - 2005-07-15
5821 o New directory servers:
5822 - tor26 has changed IP address.
5824 o Bugfixes on 0.1.0.x, crashes/leaks:
5825 - Port the servers-not-obeying-their-exit-policies fix from
5827 - Fix an fd leak in start_daemon().
5828 - On Windows, you can't always reopen a port right after you've
5829 closed it. So change retry_listeners() to only close and re-open
5830 ports that have changed.
5831 - Fix a possible double-free in tor_gzip_uncompress().
5833 o Bugfixes on 0.1.0.x, usability:
5834 - When tor_socketpair() fails in Windows, give a reasonable
5835 Windows-style errno back.
5836 - Let people type "tor --install" as well as "tor -install" when
5838 want to make it an NT service.
5839 - NT service patch from Matt Edman to improve error messages.
5840 - When the controller asks for a config option with an abbreviated
5841 name, give the full name in our response.
5842 - Correct the man page entry on TrackHostExitsExpire.
5843 - Looks like we were never delivering deflated (i.e. compressed)
5844 running-routers lists, even when asked. Oops.
5845 - When --disable-threads is set, do not search for or link against
5848 o Bugfixes on 0.1.1.x:
5849 - Fix a seg fault with autodetecting which controller version is
5853 - New hidden service descriptor format: put a version in it, and
5854 let people specify introduction/rendezvous points that aren't
5855 in "the directory" (which is subjective anyway).
5856 - Allow the DEBUG controller event to work again. Mark certain log
5857 entries as "don't tell this to controllers", so we avoid cycles.
5860 Changes in version 0.1.0.11 - 2005-06-30
5861 o Bugfixes on 0.1.0.x:
5862 - Fix major security bug: servers were disregarding their
5863 exit policies if clients behaved unexpectedly.
5864 - Make OS X init script check for missing argument, so we don't
5865 confuse users who invoke it incorrectly.
5866 - Fix a seg fault in "tor --hash-password foo".
5867 - The MAPADDRESS control command was broken.
5870 Changes in version 0.1.1.1-alpha - 2005-06-29
5872 - Make OS X init script check for missing argument, so we don't
5873 confuse users who invoke it incorrectly.
5874 - Fix a seg fault in "tor --hash-password foo".
5875 - Fix a possible way to DoS dirservers.
5876 - When we complain that your exit policy implicitly allows local or
5877 private address spaces, name them explicitly so operators can
5879 - Make the log message less scary when all the dirservers are
5880 temporarily unreachable.
5881 - We were printing the number of idle dns workers incorrectly when
5885 - Revised controller protocol (version 1) that uses ascii rather
5886 than binary. Add supporting libraries in python and java so you
5887 can use the controller from your applications without caring how
5889 - Spiffy new support for crypto hardware accelerators. Can somebody
5893 Changes in version 0.0.9.10 - 2005-06-16
5894 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
5895 - Refuse relay cells that claim to have a length larger than the
5896 maximum allowed. This prevents a potential attack that could read
5897 arbitrary memory (e.g. keys) from an exit server's process
5901 Changes in version 0.1.0.10 - 2005-06-14
5902 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
5903 libevent before 1.1a.
5906 Changes in version 0.1.0.9-rc - 2005-06-09
5908 - Reset buf->highwater every time buf_shrink() is called, not just on
5909 a successful shrink. This was causing significant memory bloat.
5910 - Fix buffer overflow when checking hashed passwords.
5911 - Security fix: if seeding the RNG on Win32 fails, quit.
5912 - Allow seeding the RNG on Win32 even when you're not running as
5914 - Disable threading on Solaris too. Something is wonky with it,
5915 cpuworkers, and reentrant libs.
5916 - Reenable the part of the code that tries to flush as soon as an
5917 OR outbuf has a full TLS record available. Perhaps this will make
5918 OR outbufs not grow as huge except in rare cases, thus saving lots
5919 of CPU time plus memory.
5920 - Reject malformed .onion addresses rather then passing them on as
5921 normal web requests.
5922 - Adapt patch from Adam Langley: fix possible memory leak in
5923 tor_lookup_hostname().
5924 - Initialize libevent later in the startup process, so the logs are
5925 already established by the time we start logging libevent warns.
5926 - Use correct errno on win32 if libevent fails.
5927 - Check and warn about known-bad/slow libevent versions.
5928 - Pay more attention to the ClientOnly config option.
5929 - Have torctl.in/tor.sh.in check for location of su binary (needed
5931 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
5932 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
5933 HttpProxyAuthenticator
5934 - Stop warning about sigpipes in the logs. We're going to
5935 pretend that getting these occassionally is normal and fine.
5936 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
5938 installer screens; and don't put stuff into StartupItems unless
5939 the user asks you to.
5940 - Require servers that use the default dirservers to have public IP
5941 addresses. We have too many servers that are configured with private
5942 IPs and their admins never notice the log entries complaining that
5943 their descriptors are being rejected.
5944 - Add OSX uninstall instructions. An actual uninstall script will
5948 Changes in version 0.1.0.8-rc - 2005-05-23
5950 - It turns out that kqueue on OS X 10.3.9 was causing kernel
5951 panics. Disable kqueue on all OS X Tors.
5952 - Fix RPM: remove duplicate line accidentally added to the rpm
5954 - Disable threads on openbsd too, since its gethostaddr is not
5956 - Tolerate libevent 0.8 since it still works, even though it's
5958 - Enable building on Red Hat 9.0 again.
5959 - Allow the middle hop of the testing circuit to be running any
5960 version, now that most of them have the bugfix to let them connect
5961 to unknown servers. This will allow reachability testing to work
5962 even when 0.0.9.7-0.0.9.9 become obsolete.
5963 - Handle relay cells with rh.length too large. This prevents
5964 a potential attack that could read arbitrary memory (maybe even
5965 keys) from the exit server's process.
5966 - We screwed up the dirport reachability testing when we don't yet
5967 have a cached version of the directory. Hopefully now fixed.
5968 - Clean up router_load_single_router() (used by the controller),
5969 so it doesn't seg fault on error.
5970 - Fix a minor memory leak when somebody establishes an introduction
5971 point at your Tor server.
5972 - If a socks connection ends because read fails, don't warn that
5973 you're not sending a socks reply back.
5976 - Add HttpProxyAuthenticator config option too, that works like
5977 the HttpsProxyAuthenticator config option.
5978 - Encode hashed controller passwords in hex instead of base64,
5979 to make it easier to write controllers.
5982 Changes in version 0.1.0.7-rc - 2005-05-17
5984 - Fix a bug in the OS X package installer that prevented it from
5985 installing on Tiger.
5986 - Fix a script bug in the OS X package installer that made it
5987 complain during installation.
5988 - Find libevent even if it's hiding in /usr/local/ and your
5989 CFLAGS and LDFLAGS don't tell you to look there.
5990 - Be able to link with libevent as a shared library (the default
5991 after 1.0d), even if it's hiding in /usr/local/lib and even
5992 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
5993 assuming you're running gcc. Otherwise fail and give a useful
5995 - Fix a bug in the RPM packager: set home directory for _tor to
5996 something more reasonable when first installing.
5997 - Free a minor amount of memory that is still reachable on exit.
6000 Changes in version 0.1.0.6-rc - 2005-05-14
6002 - Implement --disable-threads configure option. Disable threads on
6003 netbsd by default, because it appears to have no reentrant resolver
6005 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
6006 release (1.1) detects and disables kqueue if it's broken.
6007 - Append default exit policy before checking for implicit internal
6008 addresses. Now we don't log a bunch of complaints on startup
6009 when using the default exit policy.
6010 - Some people were putting "Address " in their torrc, and they had
6011 a buggy resolver that resolved " " to 0.0.0.0. Oops.
6012 - If DataDir is ~/.tor, and that expands to /.tor, then default to
6013 LOCALSTATEDIR/tor instead.
6014 - Fix fragmented-message bug in TorControl.py.
6015 - Resolve a minor bug which would prevent unreachable dirports
6016 from getting suppressed in the published descriptor.
6017 - When the controller gave us a new descriptor, we weren't resolving
6018 it immediately, so Tor would think its address was 0.0.0.0 until
6019 we fetched a new directory.
6020 - Fix an uppercase/lowercase case error in suppressing a bogus
6021 libevent warning on some Linuxes.
6024 - Begin scrubbing sensitive strings from logs by default. Turn off
6025 the config option SafeLogging if you need to do debugging.
6026 - Switch to a new buffer management algorithm, which tries to avoid
6027 reallocing and copying quite as much. In first tests it looks like
6028 it uses *more* memory on average, but less cpu.
6029 - First cut at support for "create-fast" cells. Clients can use
6030 these when extending to their first hop, since the TLS already
6031 provides forward secrecy and authentication. Not enabled on
6033 - When dirservers refuse a router descriptor, we now log its
6034 contactinfo, platform, and the poster's IP address.
6035 - Call tor_free_all instead of connections_free_all after forking, to
6036 save memory on systems that need to fork.
6037 - Whine at you if you're a server and you don't set your contactinfo.
6038 - Implement --verify-config command-line option to check if your torrc
6039 is valid without actually launching Tor.
6040 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
6041 rather than just rejecting it.
6044 Changes in version 0.1.0.5-rc - 2005-04-27
6046 - Stop trying to print a null pointer if an OR conn fails because
6047 we didn't like its cert.
6049 - Switch our internal buffers implementation to use a ring buffer,
6050 to hopefully improve performance for fast servers a lot.
6051 - Add HttpsProxyAuthenticator support (basic auth only), based
6052 on patch from Adam Langley.
6053 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
6054 the fast servers that have been joining lately.
6055 - Give hidden service accesses extra time on the first attempt,
6056 since 60 seconds is often only barely enough. This might improve
6058 - Improve performance for dirservers: stop re-parsing the whole
6059 directory every time you regenerate it.
6060 - Add more debugging info to help us find the weird dns freebsd
6061 pthreads bug; cleaner debug messages to help track future issues.
6064 Changes in version 0.0.9.9 - 2005-04-23
6065 o Bugfixes on 0.0.9.x:
6066 - If unofficial Tor clients connect and send weird TLS certs, our
6067 Tor server triggers an assert. This release contains a minimal
6068 backport from the broader fix that we put into 0.1.0.4-rc.
6071 Changes in version 0.1.0.4-rc - 2005-04-23
6073 - If unofficial Tor clients connect and send weird TLS certs, our
6074 Tor server triggers an assert. Stop asserting, and start handling
6075 TLS errors better in other situations too.
6076 - When the controller asks us to tell it about all the debug-level
6077 logs, it turns out we were generating debug-level logs while
6078 telling it about them, which turns into a bad loop. Now keep
6079 track of whether you're sending a debug log to the controller,
6080 and don't log when you are.
6081 - Fix the "postdescriptor" feature of the controller interface: on
6082 non-complete success, only say "done" once.
6084 - Clients are now willing to load balance over up to 2mB, not 1mB,
6085 of advertised bandwidth capacity.
6086 - Add a NoPublish config option, so you can be a server (e.g. for
6087 testing running Tor servers in other Tor networks) without
6088 publishing your descriptor to the primary dirservers.
6091 Changes in version 0.1.0.3-rc - 2005-04-08
6092 o Improvements on 0.1.0.2-rc:
6093 - Client now retries when streams end early for 'hibernating' or
6094 'resource limit' reasons, rather than failing them.
6095 - More automated handling for dirserver operators:
6096 - Automatically approve nodes running 0.1.0.2-rc or later,
6097 now that the the reachability detection stuff is working.
6098 - Now we allow two unverified servers with the same nickname
6099 but different keys. But if a nickname is verified, only that
6100 nickname+key are allowed.
6101 - If you're an authdirserver connecting to an address:port,
6102 and it's not the OR you were expecting, forget about that
6103 descriptor. If he *was* the one you were expecting, then forget
6104 about all other descriptors for that address:port.
6105 - Allow servers to publish descriptors from 12 hours in the future.
6106 Corollary: only whine about clock skew from the dirserver if
6107 he's a trusted dirserver (since now even verified servers could
6108 have quite wrong clocks).
6109 - Adjust maximum skew and age for rendezvous descriptors: let skew
6110 be 48 hours rather than 90 minutes.
6111 - Efficiency improvements:
6112 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
6113 it much faster to look up a circuit for each relay cell.
6114 - Remove most calls to assert_all_pending_dns_resolves_ok(),
6115 since they're eating our cpu on exit nodes.
6116 - Stop wasting time doing a case insensitive comparison for every
6117 dns name every time we do any lookup. Canonicalize the names to
6118 lowercase and be done with it.
6119 - Start sending 'truncated' cells back rather than destroy cells,
6120 if the circuit closes in front of you. This means we won't have
6121 to abandon partially built circuits.
6122 - Only warn once per nickname from add_nickname_list_to_smartlist
6123 per failure, so an entrynode or exitnode choice that's down won't
6125 - Put a note in the torrc about abuse potential with the default
6127 - Revise control spec and implementation to allow all log messages to
6128 be sent to controller with their severities intact (suggested by
6129 Matt Edman). Update TorControl to handle new log event types.
6130 - Provide better explanation messages when controller's POSTDESCRIPTOR
6132 - Stop putting nodename in the Platform string in server descriptors.
6133 It doesn't actually help, and it is confusing/upsetting some people.
6135 o Bugfixes on 0.1.0.2-rc:
6136 - We were printing the host mask wrong in exit policies in server
6137 descriptors. This isn't a critical bug though, since we were still
6138 obeying the exit policy internally.
6139 - Fix Tor when compiled with libevent but without pthreads: move
6140 connection_unregister() from _connection_free() to
6142 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
6143 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
6144 when we look through the connection array, we'll find any of the
6145 cpu/dnsworkers. This is no good.
6147 o Bugfixes on 0.0.9.8:
6148 - Fix possible bug on threading platforms (e.g. win32) which was
6149 leaking a file descriptor whenever a cpuworker or dnsworker died.
6150 - When using preferred entry or exit nodes, ignore whether the
6151 circuit wants uptime or capacity. They asked for the nodes, they
6153 - chdir() to your datadirectory at the *end* of the daemonize process,
6154 not the beginning. This was a problem because the first time you
6155 run tor, if your datadir isn't there, and you have runasdaemon set
6156 to 1, it will try to chdir to it before it tries to create it. Oops.
6157 - Handle changed router status correctly when dirserver reloads
6158 fingerprint file. We used to be dropping all unverified descriptors
6159 right then. The bug was hidden because we would immediately
6160 fetch a directory from another dirserver, which would include the
6161 descriptors we just dropped.
6162 - When we're connecting to an OR and he's got a different nickname/key
6163 than we were expecting, only complain loudly if we're an OP or a
6164 dirserver. Complaining loudly to the OR admins just confuses them.
6165 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
6166 artificially capped at 500kB.
6169 Changes in version 0.0.9.8 - 2005-04-07
6170 o Bugfixes on 0.0.9.x:
6171 - We have a bug that I haven't found yet. Sometimes, very rarely,
6172 cpuworkers get stuck in the 'busy' state, even though the cpuworker
6173 thinks of itself as idle. This meant that no new circuits ever got
6174 established. Here's a workaround to kill any cpuworker that's been
6175 busy for more than 100 seconds.
6178 Changes in version 0.1.0.2-rc - 2005-04-01
6179 o Bugfixes on 0.1.0.1-rc:
6180 - Fixes on reachability detection:
6181 - Don't check for reachability while hibernating.
6182 - If ORPort is reachable but DirPort isn't, still publish the
6183 descriptor, but zero out DirPort until it's found reachable.
6184 - When building testing circs for ORPort testing, use only
6185 high-bandwidth nodes, so fewer circuits fail.
6186 - Complain about unreachable ORPort separately from unreachable
6187 DirPort, so the user knows what's going on.
6188 - Make sure we only conclude ORPort reachability if we didn't
6189 initiate the conn. Otherwise we could falsely conclude that
6190 we're reachable just because we connected to the guy earlier
6191 and he used that same pipe to extend to us.
6192 - Authdirservers shouldn't do ORPort reachability detection,
6193 since they're in clique mode, so it will be rare to find a
6194 server not already connected to them.
6195 - When building testing circuits, always pick middle hops running
6196 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
6197 bug. (This is a kludge; it will go away when 0.0.9.x becomes
6199 - When we decide we're reachable, actually publish our descriptor
6201 - Fix bug in redirectstream in the controller.
6202 - Fix the state descriptor strings so logs don't claim edge streams
6203 are in a different state than they actually are.
6204 - Use recent libevent features when possible (this only really affects
6205 win32 and osx right now, because the new libevent with these
6206 features hasn't been released yet). Add code to suppress spurious
6208 - Prevent possible segfault in connection_close_unattached_ap().
6209 - Fix newlines on torrc in win32.
6210 - Improve error msgs when tor-resolve fails.
6212 o Improvements on 0.0.9.x:
6213 - New experimental script tor/contrib/ExerciseServer.py (needs more
6214 work) that uses the controller interface to build circuits and
6215 fetch pages over them. This will help us bootstrap servers that
6216 have lots of capacity but haven't noticed it yet.
6217 - New experimental script tor/contrib/PathDemo.py (needs more work)
6218 that uses the controller interface to let you choose whole paths
6220 "<hostname>.<path,separated by dots>.<length of path>.path"
6221 - When we've connected to an OR and handshaked but didn't like
6222 the result, we were closing the conn without sending destroy
6223 cells back for pending circuits. Now send those destroys.
6226 Changes in version 0.0.9.7 - 2005-04-01
6227 o Bugfixes on 0.0.9.x:
6228 - Fix another race crash bug (thanks to Glenn Fink for reporting).
6229 - Compare identity to identity, not to nickname, when extending to
6230 a router not already in the directory. This was preventing us from
6231 extending to unknown routers. Oops.
6232 - Make sure to create OS X Tor user in <500 range, so we aren't
6233 creating actual system users.
6234 - Note where connection-that-hasn't-sent-end was marked, and fix
6235 a few really loud instances of this harmless bug (it's fixed more
6239 Changes in version 0.1.0.1-rc - 2005-03-28
6241 - Add reachability testing. Your Tor server will automatically try
6242 to see if its ORPort and DirPort are reachable from the outside,
6243 and it won't upload its descriptor until it decides they are.
6244 - Handle unavailable hidden services better. Handle slow or busy
6245 hidden services better.
6246 - Add support for CONNECTing through https proxies, with "HttpsProxy"
6248 - New exit policy: accept most low-numbered ports, rather than
6249 rejecting most low-numbered ports.
6250 - More Tor controller support (still experimental). See
6251 http://tor.eff.org/doc/control-spec.txt for all the new features,
6252 including signals to emulate unix signals from any platform;
6253 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
6254 closestream; closecircuit; etc.
6255 - Make nt services work and start on startup on win32 (based on
6256 patch by Matt Edman).
6257 - Add a new AddressMap config directive to rewrite incoming socks
6258 addresses. This lets you, for example, declare an implicit
6259 required exit node for certain sites.
6260 - Add a new TrackHostExits config directive to trigger addressmaps
6261 for certain incoming socks addresses -- for sites that break when
6262 your exit keeps changing (based on patch by Mike Perry).
6263 - Redo the client-side dns cache so it's just an addressmap too.
6264 - Notice when our IP changes, and reset stats/uptime/reachability.
6265 - When an application is using socks5, give him the whole variety of
6266 potential socks5 responses (connect refused, host unreachable, etc),
6267 rather than just "success" or "failure".
6268 - A more sane version numbering system. See
6269 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
6270 - New contributed script "exitlist": a simple python script to
6271 parse directories and find Tor nodes that exit to listed
6273 - New contributed script "privoxy-tor-toggle" to toggle whether
6274 Privoxy uses Tor. Seems to be configured for Debian by default.
6275 - Report HTTP reasons to client when getting a response from directory
6276 servers -- so you can actually know what went wrong.
6277 - New config option MaxAdvertisedBandwidth which lets you advertise
6278 a low bandwidthrate (to not attract as many circuits) while still
6279 allowing a higher bandwidthrate in reality.
6281 o Robustness/stability fixes:
6282 - Make Tor use Niels Provos's libevent instead of its current
6283 poll-but-sometimes-select mess. This will let us use faster async
6284 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
6286 - pthread support now too. This was forced because when we forked,
6287 we ended up wasting a lot of duplicate ram over time. Also switch
6288 to foo_r versions of some library calls to allow reentry and
6290 - Better handling for heterogeneous / unreliable nodes:
6291 - Annotate circuits w/ whether they aim to contain high uptime nodes
6292 and/or high capacity nodes. When building circuits, choose
6294 - This means that every single node in an intro rend circuit,
6295 not just the last one, will have a minimum uptime.
6296 - New config option LongLivedPorts to indicate application streams
6297 that will want high uptime circuits.
6298 - Servers reset uptime when a dir fetch entirely fails. This
6299 hopefully reflects stability of the server's network connectivity.
6300 - If somebody starts his tor server in Jan 2004 and then fixes his
6301 clock, don't make his published uptime be a year.
6302 - Reset published uptime when you wake up from hibernation.
6303 - Introduce a notion of 'internal' circs, which are chosen without
6304 regard to the exit policy of the last hop. Intro and rendezvous
6305 circs must be internal circs, to avoid leaking information. Resolve
6306 and connect streams can use internal circs if they want.
6307 - New circuit pooling algorithm: make sure to have enough circs around
6308 to satisfy any predicted ports, and also make sure to have 2 internal
6309 circs around if we've required internal circs lately (and with high
6310 uptime if we've seen that lately too).
6311 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
6312 which describes how often we retry making new circuits if current
6313 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
6314 how long we're willing to make use of an already-dirty circuit.
6315 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
6316 circ as necessary, if there are any completed ones lying around
6317 when we try to launch one.
6318 - Make hidden services try to establish a rendezvous for 30 seconds,
6319 rather than for n (where n=3) attempts to build a circuit.
6320 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
6321 "ShutdownWaitLength".
6322 - Try to be more zealous about calling connection_edge_end when
6323 things go bad with edge conns in connection.c.
6324 - Revise tor-spec to add more/better stream end reasons.
6325 - Revise all calls to connection_edge_end to avoid sending "misc",
6326 and to take errno into account where possible.
6329 - Fix a race condition that can trigger an assert, when we have a
6330 pending create cell and an OR connection fails right then.
6331 - Fix several double-mark-for-close bugs, e.g. where we were finding
6332 a conn for a cell even if that conn is already marked for close.
6333 - Make sequence of log messages when starting on win32 with no config
6334 file more reasonable.
6335 - When choosing an exit node for a new non-internal circ, don't take
6336 into account whether it'll be useful for any pending x.onion
6337 addresses -- it won't.
6338 - Turn addr_policy_compare from a tristate to a quadstate; this should
6339 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
6340 for google.com" problem.
6341 - Make "platform" string in descriptor more accurate for Win32 servers,
6342 so it's not just "unknown platform".
6343 - Fix an edge case in parsing config options (thanks weasel).
6344 If they say "--" on the commandline, it's not an option.
6345 - Reject odd-looking addresses at the client (e.g. addresses that
6346 contain a colon), rather than having the server drop them because
6348 - tor-resolve requests were ignoring .exit if there was a working circuit
6349 they could use instead.
6350 - REUSEADDR on normal platforms means you can rebind to the port
6351 right after somebody else has let it go. But REUSEADDR on win32
6352 means to let you bind to the port _even when somebody else
6353 already has it bound_! So, don't do that on Win32.
6354 - Change version parsing logic: a version is "obsolete" if it is not
6355 recommended and (1) there is a newer recommended version in the
6356 same series, or (2) there are no recommended versions in the same
6357 series, but there are some recommended versions in a newer series.
6358 A version is "new" if it is newer than any recommended version in
6360 - Stop most cases of hanging up on a socks connection without sending
6364 - Require BandwidthRate to be at least 20kB/s for servers.
6365 - When a dirserver causes you to give a warn, mention which dirserver
6367 - New config option DirAllowPrivateAddresses for authdirservers.
6368 Now by default they refuse router descriptors that have non-IP or
6369 private-IP addresses.
6370 - Stop publishing socksport in the directory, since it's not
6371 actually meant to be public. For compatibility, publish a 0 there
6373 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
6374 smart" value, that is low for servers and high for clients.
6375 - If our clock jumps forward by 100 seconds or more, assume something
6376 has gone wrong with our network and abandon all not-yet-used circs.
6377 - Warn when exit policy implicitly allows local addresses.
6378 - If we get an incredibly skewed timestamp from a dirserver mirror
6379 that isn't a verified OR, don't warn -- it's probably him that's
6381 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
6382 cookies to disk and doesn't log each web request to disk. (Thanks
6383 to Brett Carrington for pointing this out.)
6384 - When a client asks us for a dir mirror and we don't have one,
6385 launch an attempt to get a fresh one.
6386 - If we're hibernating and we get a SIGINT, exit immediately.
6387 - Add --with-dmalloc ./configure option, to track memory leaks.
6388 - And try to free all memory on closing, so we can detect what
6390 - Cache local dns resolves correctly even when they're .exit
6392 - Give a better warning when some other server advertises an
6393 ORPort that is actually an apache running ssl.
6394 - Add "opt hibernating 1" to server descriptor to make it clearer
6395 whether the server is hibernating.
6398 Changes in version 0.0.9.6 - 2005-03-24
6399 o Bugfixes on 0.0.9.x (crashes and asserts):
6400 - Add new end stream reasons to maintainance branch. Fix bug where
6401 reason (8) could trigger an assert. Prevent bug from recurring.
6402 - Apparently win32 stat wants paths to not end with a slash.
6403 - Fix assert triggers in assert_cpath_layer_ok(), where we were
6404 blowing away the circuit that conn->cpath_layer points to, then
6405 checking to see if the circ is well-formed. Backport check to make
6406 sure we dont use the cpath on a closed connection.
6407 - Prevent circuit_resume_edge_reading_helper() from trying to package
6408 inbufs for marked-for-close streams.
6409 - Don't crash on hup if your options->address has become unresolvable.
6410 - Some systems (like OS X) sometimes accept() a connection and tell
6411 you the remote host is 0.0.0.0:0. If this happens, due to some
6412 other mis-features, we get confused; so refuse the conn for now.
6414 o Bugfixes on 0.0.9.x (other):
6415 - Fix harmless but scary "Unrecognized content encoding" warn message.
6416 - Add new stream error reason: TORPROTOCOL reason means "you are not
6417 speaking a version of Tor I understand; say bye-bye to your stream."
6418 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
6419 into the future, now that we are more tolerant of skew. This
6420 resolves a bug where a Tor server would refuse to cache a directory
6421 because all the directories it gets are too far in the future;
6422 yet the Tor server never logs any complaints about clock skew.
6423 - Mac packaging magic: make man pages useable, and do not overwrite
6424 existing torrc files.
6425 - Make OS X log happily to /var/log/tor/tor.log
6428 Changes in version 0.0.9.5 - 2005-02-22
6429 o Bugfixes on 0.0.9.x:
6430 - Fix an assert race at exit nodes when resolve requests fail.
6431 - Stop picking unverified dir mirrors--it only leads to misery.
6432 - Patch from Matt Edman to make NT services work better. Service
6433 support is still not compiled into the executable by default.
6434 - Patch from Dmitri Bely so the Tor service runs better under
6435 the win32 SYSTEM account.
6436 - Make tor-resolve actually work (?) on Win32.
6437 - Fix a sign bug when getrlimit claims to have 4+ billion
6438 file descriptors available.
6439 - Stop refusing to start when bandwidthburst == bandwidthrate.
6440 - When create cells have been on the onion queue more than five
6441 seconds, just send back a destroy and take them off the list.
6444 Changes in version 0.0.9.4 - 2005-02-03
6445 o Bugfixes on 0.0.9:
6446 - Fix an assert bug that took down most of our servers: when
6447 a server claims to have 1 GB of bandwidthburst, don't
6449 - Don't crash as badly if we have spawned the max allowed number
6450 of dnsworkers, or we're out of file descriptors.
6451 - Block more file-sharing ports in the default exit policy.
6452 - MaxConn is now automatically set to the hard limit of max
6453 file descriptors we're allowed (ulimit -n), minus a few for
6455 - Give a clearer message when servers need to raise their
6456 ulimit -n when they start running out of file descriptors.
6457 - SGI Compatibility patches from Jan Schaumann.
6458 - Tolerate a corrupt cached directory better.
6459 - When a dirserver hasn't approved your server, list which one.
6460 - Go into soft hibernation after 95% of the bandwidth is used,
6461 not 99%. This is especially important for daily hibernators who
6462 have a small accounting max. Hopefully it will result in fewer
6463 cut connections when the hard hibernation starts.
6464 - Load-balance better when using servers that claim more than
6465 800kB/s of capacity.
6466 - Make NT services work (experimental, only used if compiled in).
6469 Changes in version 0.0.9.3 - 2005-01-21
6470 o Bugfixes on 0.0.9:
6471 - Backport the cpu use fixes from main branch, so busy servers won't
6472 need as much processor time.
6473 - Work better when we go offline and then come back, or when we
6474 run Tor at boot before the network is up. We do this by
6475 optimistically trying to fetch a new directory whenever an
6476 application request comes in and we think we're offline -- the
6477 human is hopefully a good measure of when the network is back.
6478 - Backport some minimal hidserv bugfixes: keep rend circuits open as
6479 long as you keep using them; actually publish hidserv descriptors
6480 shortly after they change, rather than waiting 20-40 minutes.
6481 - Enable Mac startup script by default.
6482 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
6483 - When you update AllowUnverifiedNodes or FirewallPorts via the
6484 controller's setconf feature, we were always appending, never
6486 - When you update HiddenServiceDir via setconf, it was screwing up
6487 the order of reading the lines, making it fail.
6488 - Do not rewrite a cached directory back to the cache; otherwise we
6489 will think it is recent and not fetch a newer one on startup.
6490 - Workaround for webservers that lie about Content-Encoding: Tor
6491 now tries to autodetect compressed directories and compression
6492 itself. This lets us Proxypass dir fetches through apache.
6495 Changes in version 0.0.9.2 - 2005-01-04
6496 o Bugfixes on 0.0.9 (crashes and asserts):
6497 - Fix an assert on startup when the disk is full and you're logging
6499 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
6500 style address, then we'd crash.
6501 - Fix an assert trigger when the running-routers string we get from
6502 a dirserver is broken.
6503 - Make worker threads start and run on win32. Now win32 servers
6505 - Bandaid (not actually fix, but now it doesn't crash) an assert
6506 where the dns worker dies mysteriously and the main Tor process
6507 doesn't remember anything about the address it was resolving.
6509 o Bugfixes on 0.0.9 (Win32):
6510 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
6511 name out of the warning/assert messages.
6512 - Fix a superficial "unhandled error on read" bug on win32.
6513 - The win32 installer no longer requires a click-through for our
6514 license, since our Free Software license grants rights but does not
6516 - Win32: When connecting to a dirserver fails, try another one
6517 immediately. (This was already working for non-win32 Tors.)
6518 - Stop trying to parse $HOME on win32 when hunting for default
6520 - Make tor-resolve.c work on win32 by calling network_init().
6522 o Bugfixes on 0.0.9 (other):
6523 - Make 0.0.9.x build on Solaris again.
6524 - Due to a fencepost error, we were blowing away the \n when reporting
6525 confvalue items in the controller. So asking for multiple config
6526 values at once couldn't work.
6527 - When listing circuits that are pending on an opening OR connection,
6528 if we're an OR we were listing circuits that *end* at us as
6529 being pending on every listener, dns/cpu worker, etc. Stop that.
6530 - Dirservers were failing to create 'running-routers' or 'directory'
6531 strings if we had more than some threshold of routers. Fix them so
6532 they can handle any number of routers.
6533 - Fix a superficial "Duplicate mark for close" bug.
6534 - Stop checking for clock skew for OR connections, even for servers.
6535 - Fix a fencepost error that was chopping off the last letter of any
6536 nickname that is the maximum allowed nickname length.
6537 - Update URLs in log messages so they point to the new website.
6538 - Fix a potential problem in mangling server private keys while
6539 writing to disk (not triggered yet, as far as we know).
6540 - Include the licenses for other free software we include in Tor,
6541 now that we're shipping binary distributions more regularly.
6544 Changes in version 0.0.9.1 - 2004-12-15
6545 o Bugfixes on 0.0.9:
6546 - Make hibernation actually work.
6547 - Make HashedControlPassword config option work.
6548 - When we're reporting event circuit status to a controller,
6549 don't use the stream status code.
6552 Changes in version 0.0.9 - 2004-12-12
6554 - Clean up manpage and torrc.sample file.
6555 - Clean up severities and text of log warnings.
6557 - Make servers trigger an assert when they enter hibernation.
6560 Changes in version 0.0.9rc7 - 2004-12-08
6561 o Bugfixes on 0.0.9rc:
6562 - Fix a stack-trashing crash when an exit node begins hibernating.
6563 - Avoid looking at unallocated memory while considering which
6564 ports we need to build circuits to cover.
6565 - Stop a sigpipe: when an 'end' cell races with eof from the app,
6566 we shouldn't hold-open-until-flush if the eof arrived first.
6567 - Fix a bug with init_cookie_authentication() in the controller.
6568 - When recommending new-format log lines, if the upper bound is
6569 LOG_ERR, leave it implicit.
6571 o Bugfixes on 0.0.8.1:
6572 - Fix a whole slew of memory leaks.
6573 - Fix isspace() and friends so they still make Solaris happy
6574 but also so they don't trigger asserts on win32.
6575 - Fix parse_iso_time on platforms without strptime (eg win32).
6576 - win32: tolerate extra "readable" events better.
6577 - win32: when being multithreaded, leave parent fdarray open.
6578 - Make unit tests work on win32.
6581 Changes in version 0.0.9rc6 - 2004-12-06
6582 o Bugfixes on 0.0.9pre:
6583 - Clean up some more integer underflow opportunities (not exploitable
6585 - While hibernating, hup should not regrow our listeners.
6586 - Send an end to the streams we close when we hibernate, rather
6587 than just chopping them off.
6588 - React to eof immediately on non-open edge connections.
6590 o Bugfixes on 0.0.8.1:
6591 - Calculate timeout for waiting for a connected cell from the time
6592 we sent the begin cell, not from the time the stream started. If
6593 it took a long time to establish the circuit, we would time out
6594 right after sending the begin cell.
6595 - Fix router_compare_addr_to_addr_policy: it was not treating a port
6596 of * as always matching, so we were picking reject *:* nodes as
6597 exit nodes too. Oops.
6600 - New circuit building strategy: keep a list of ports that we've
6601 used in the past 6 hours, and always try to have 2 circuits open
6602 or on the way that will handle each such port. Seed us with port
6603 80 so web users won't complain that Tor is "slow to start up".
6604 - Make kill -USR1 dump more useful stats about circuits.
6605 - When warning about retrying or giving up, print the address, so
6606 the user knows which one it's talking about.
6607 - If you haven't used a clean circuit in an hour, throw it away,
6608 just to be on the safe side. (This means after 6 hours a totally
6609 unused Tor client will have no circuits open.)
6612 Changes in version 0.0.9rc5 - 2004-12-01
6613 o Bugfixes on 0.0.8.1:
6614 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
6615 - Let resolve conns retry/expire also, rather than sticking around
6617 - If we are using select, make sure we stay within FD_SETSIZE.
6619 o Bugfixes on 0.0.9pre:
6620 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
6621 but doesn't seem to be currently; thanks to Ilja van Sprundel for
6623 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
6624 instead. Impose minima and maxima for all *Period options; impose
6625 even tighter maxima for fetching if we are a caching dirserver.
6626 Clip rather than rejecting.
6627 - Fetch cached running-routers from servers that serve it (that is,
6628 authdirservers and servers running 0.0.9rc5-cvs or later.)
6631 - Accept *:706 (silc) in default exit policy.
6632 - Implement new versioning format for post 0.1.
6633 - Support "foo.nickname.exit" addresses, to let Alice request the
6634 address "foo" as viewed by exit node "nickname". Based on a patch
6636 - Make tor --version --version dump the cvs Id of every file.
6639 Changes in version 0.0.9rc4 - 2004-11-28
6640 o Bugfixes on 0.0.8.1:
6641 - Make windows sockets actually non-blocking (oops), and handle
6642 win32 socket errors better.
6644 o Bugfixes on 0.0.9rc1:
6645 - Actually catch the -USR2 signal.
6648 Changes in version 0.0.9rc3 - 2004-11-25
6649 o Bugfixes on 0.0.8.1:
6650 - Flush the log file descriptor after we print "Tor opening log file",
6651 so we don't see those messages days later.
6653 o Bugfixes on 0.0.9rc1:
6654 - Make tor-resolve work again.
6655 - Avoid infinite loop in tor-resolve if tor hangs up on it.
6656 - Fix an assert trigger for clients/servers handling resolves.
6659 Changes in version 0.0.9rc2 - 2004-11-24
6660 o Bugfixes on 0.0.9rc1:
6661 - I broke socks5 support while fixing the eof bug.
6662 - Allow unitless bandwidths and intervals; they default to bytes
6664 - New servers don't start out hibernating; they are active until
6665 they run out of bytes, so they have a better estimate of how
6666 long it takes, and so their operators can know they're working.
6669 Changes in version 0.0.9rc1 - 2004-11-23
6670 o Bugfixes on 0.0.8.1:
6671 - Finally fix a bug that's been plaguing us for a year:
6672 With high load, circuit package window was reaching 0. Whenever
6673 we got a circuit-level sendme, we were reading a lot on each
6674 socket, but only writing out a bit. So we would eventually reach
6675 eof. This would be noticed and acted on even when there were still
6676 bytes sitting in the inbuf.
6677 - When poll() is interrupted, we shouldn't believe the revents values.
6679 o Bugfixes on 0.0.9pre6:
6680 - Fix hibernate bug that caused pre6 to be broken.
6681 - Don't keep rephist info for routers that haven't had activity for
6682 24 hours. (This matters now that clients have keys, since we track
6684 - Never call close_temp_logs while validating log options.
6685 - Fix backslash-escaping on tor.sh.in and torctl.in.
6688 - Implement weekly/monthly/daily accounting: now you specify your
6689 hibernation properties by
6690 AccountingMax N bytes|KB|MB|GB|TB
6691 AccountingStart day|week|month [day] HH:MM
6692 Defaults to "month 1 0:00".
6693 - Let bandwidth and interval config options be specified as 5 bytes,
6694 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
6695 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
6696 get back to normal.)
6697 - If your requested entry or exit node has advertised bandwidth 0,
6699 - Be more greedy about filling up relay cells -- we try reading again
6700 once we've processed the stuff we read, in case enough has arrived
6701 to fill the last cell completely.
6702 - Apply NT service patch from Osamu Fujino. Still needs more work.
6705 Changes in version 0.0.9pre6 - 2004-11-15
6706 o Bugfixes on 0.0.8.1:
6707 - Fix assert failure on malformed socks4a requests.
6708 - Use identity comparison, not nickname comparison, to choose which
6709 half of circuit-ID-space each side gets to use. This is needed
6710 because sometimes we think of a router as a nickname, and sometimes
6711 as a hex ID, and we can't predict what the other side will do.
6712 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
6713 write() call will fail and we handle it there.
6714 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
6715 and smartlist_len, which are two major profiling offenders.
6717 o Bugfixes on 0.0.9pre5:
6718 - Fix a bug in read_all that was corrupting config files on windows.
6719 - When we're raising the max number of open file descriptors to
6720 'unlimited', don't log that we just raised it to '-1'.
6721 - Include event code with events, as required by control-spec.txt.
6722 - Don't give a fingerprint when clients do --list-fingerprint:
6723 it's misleading, because it will never be the same again.
6724 - Stop using strlcpy in tor_strndup, since it was slowing us
6726 - Remove warn on startup about missing cached-directory file.
6727 - Make kill -USR1 work again.
6728 - Hibernate if we start tor during the "wait for wakeup-time" phase
6729 of an accounting interval. Log our hibernation plans better.
6730 - Authoritative dirservers now also cache their directory, so they
6731 have it on start-up.
6734 - Fetch running-routers; cache running-routers; compress
6735 running-routers; serve compressed running-routers.z
6736 - Add NSI installer script contributed by J Doe.
6737 - Commit VC6 and VC7 workspace/project files.
6738 - Commit a tor.spec for making RPM files, with help from jbash.
6739 - Add contrib/torctl.in contributed by Glenn Fink.
6740 - Implement the control-spec's SAVECONF command, to write your
6741 configuration to torrc.
6742 - Get cookie authentication for the controller closer to working.
6743 - Include control-spec.txt in the tarball.
6744 - When set_conf changes our server descriptor, upload a new copy.
6745 But don't upload it too often if there are frequent changes.
6746 - Document authentication config in man page, and document signals
6748 - Clean up confusing parts of man page and torrc.sample.
6749 - Make expand_filename handle ~ and ~username.
6750 - Use autoconf to enable largefile support where necessary. Use
6751 ftello where available, since ftell can fail at 2GB.
6752 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
6753 log more informatively.
6754 - Give a slightly more useful output for "tor -h".
6755 - Refuse application socks connections to port 0.
6756 - Check clock skew for verified servers, but allow unverified
6757 servers and clients to have any clock skew.
6758 - Break DirFetchPostPeriod into:
6759 - DirFetchPeriod for fetching full directory,
6760 - StatusFetchPeriod for fetching running-routers,
6761 - DirPostPeriod for posting server descriptor,
6762 - RendPostPeriod for posting hidden service descriptors.
6763 - Make sure the hidden service descriptors are at a random offset
6764 from each other, to hinder linkability.
6767 Changes in version 0.0.9pre5 - 2004-11-09
6768 o Bugfixes on 0.0.9pre4:
6769 - Fix a seg fault in unit tests (doesn't affect main program).
6770 - Fix an assert bug where a hidden service provider would fail if
6771 the first hop of his rendezvous circuit was down.
6772 - Hidden service operators now correctly handle version 1 style
6773 INTRODUCE1 cells (nobody generates them still, so not a critical
6775 - If do_hup fails, actually notice.
6776 - Handle more errnos from accept() without closing the listener.
6777 Some OpenBSD machines were closing their listeners because
6778 they ran out of file descriptors.
6779 - Send resolve cells to exit routers that are running a new
6780 enough version of the resolve code to work right.
6781 - Better handling of winsock includes on non-MSV win32 compilers.
6782 - Some people had wrapped their tor client/server in a script
6783 that would restart it whenever it died. This did not play well
6784 with our "shut down if your version is obsolete" code. Now people
6785 don't fetch a new directory if their local cached version is
6787 - Make our autogen.sh work on ksh as well as bash.
6790 - Hibernation: New config option "AccountingMaxKB" lets you
6791 set how many KBytes per month you want to allow your server to
6792 consume. Rather than spreading those bytes out evenly over the
6793 month, we instead hibernate for some of the month and pop up
6794 at a deterministic time, work until the bytes are consumed, then
6795 hibernate again. Config option "MonthlyAccountingStart" lets you
6796 specify which day of the month your billing cycle starts on.
6797 - Control interface: a separate program can now talk to your
6798 client/server over a socket, and get/set config options, receive
6799 notifications of circuits and streams starting/finishing/dying,
6800 bandwidth used, etc. The next step is to get some GUIs working.
6801 Let us know if you want to help out. See doc/control-spec.txt .
6802 - Ship a contrib/tor-control.py as an example script to interact
6803 with the control port.
6804 - "tor --hash-password zzyxz" will output a salted password for
6805 use in authenticating to the control interface.
6806 - New log format in config:
6807 "Log minsev[-maxsev] stdout|stderr|syslog" or
6808 "Log minsev[-maxsev] file /var/foo"
6811 - DirPolicy config option, to let people reject incoming addresses
6812 from their dirserver.
6813 - "tor --list-fingerprint" will list your identity key fingerprint
6815 - Add "pass" target for RedirectExit, to make it easier to break
6816 out of a sequence of RedirectExit rules.
6817 - Clients now generate a TLS cert too, in preparation for having
6818 them act more like real nodes.
6819 - Ship src/win32/ in the tarball, so people can use it to build.
6820 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
6822 - New "router-status" line in directory, to better bind each verified
6823 nickname to its identity key.
6824 - Deprecate unofficial config option abbreviations, and abbreviations
6825 not on the command line.
6826 - Add a pure-C tor-resolve implementation.
6827 - Use getrlimit and friends to ensure we can reach MaxConn (currently
6828 1024) file descriptors.
6830 o Code security improvements, inspired by Ilja:
6831 - Replace sprintf with snprintf. (I think they were all safe, but
6833 - Replace strcpy/strncpy with strlcpy in more places.
6834 - Avoid strcat; use snprintf or strlcat instead.
6835 - snprintf wrapper with consistent (though not C99) overflow behavior.
6838 Changes in version 0.0.9pre4 - 2004-10-17
6839 o Bugfixes on 0.0.9pre3:
6840 - If the server doesn't specify an exit policy, use the real default
6841 exit policy, not reject *:*.
6842 - Ignore fascistfirewall when uploading/downloading hidden service
6843 descriptors, since we go through Tor for those; and when using
6844 an HttpProxy, since we assume it can reach them all.
6845 - When looking for an authoritative dirserver, use only the ones
6846 configured at boot. Don't bother looking in the directory.
6847 - The rest of the fix for get_default_conf_file() on older win32.
6848 - Make 'Routerfile' config option obsolete.
6851 - New 'MyFamily nick1,...' config option for a server to
6852 specify other servers that shouldn't be used in the same circuit
6853 with it. Only believed if nick1 also specifies us.
6854 - New 'NodeFamily nick1,nick2,...' config option for a client to
6855 specify nodes that it doesn't want to use in the same circuit.
6856 - New 'Redirectexit pattern address:port' config option for a
6857 server to redirect exit connections, e.g. to a local squid.
6860 Changes in version 0.0.9pre3 - 2004-10-13
6861 o Bugfixes on 0.0.8.1:
6862 - Better torrc example lines for dirbindaddress and orbindaddress.
6863 - Improved bounds checking on parsed ints (e.g. config options and
6864 the ones we find in directories.)
6865 - Better handling of size_t vs int, so we're more robust on 64
6867 - Fix the rest of the bug where a newly started OR would appear
6868 as unverified even after we've added his fingerprint and hupped
6870 - Fix a bug from 0.0.7: when read() failed on a stream, we would
6871 close it without sending back an end. So 'connection refused'
6872 would simply be ignored and the user would get no response.
6874 o Bugfixes on 0.0.9pre2:
6875 - Serving the cached-on-disk directory to people is bad. We now
6876 provide no directory until we've fetched a fresh one.
6877 - Workaround for bug on windows where cached-directories get crlf
6879 - Make get_default_conf_file() work on older windows too.
6880 - If we write a *:* exit policy line in the descriptor, don't write
6881 any more exit policy lines.
6884 - Use only 0.0.9pre1 and later servers for resolve cells.
6885 - Make the dirservers file obsolete.
6886 - Include a dir-signing-key token in directories to tell the
6887 parsing entity which key is being used to sign.
6888 - Remove the built-in bulky default dirservers string.
6889 - New config option "Dirserver %s:%d [fingerprint]", which can be
6890 repeated as many times as needed. If no dirservers specified,
6891 default to moria1,moria2,tor26.
6892 - Make moria2 advertise a dirport of 80, so people behind firewalls
6893 will be able to get a directory.
6894 - Http proxy support
6895 - Dirservers translate requests for http://%s:%d/x to /x
6896 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
6897 be routed through this host.
6898 - Clients ask for /tor/x rather than /x for new enough dirservers.
6899 This way we can one day coexist peacefully with apache.
6900 - Clients specify a "Host: %s%d" http header, to be compatible
6901 with more proxies, and so running squid on an exit node can work.
6904 Changes in version 0.0.8.1 - 2004-10-13
6906 - Fix a seg fault that can be triggered remotely for Tor
6907 clients/servers with an open dirport.
6908 - Fix a rare assert trigger, where routerinfos for entries in
6909 our cpath would expire while we're building the path.
6910 - Fix a bug in OutboundBindAddress so it (hopefully) works.
6911 - Fix a rare seg fault for people running hidden services on
6912 intermittent connections.
6913 - Fix a bug in parsing opt keywords with objects.
6914 - Fix a stale pointer assert bug when a stream detaches and
6916 - Fix a string format vulnerability (probably not exploitable)
6917 in reporting stats locally.
6918 - Fix an assert trigger: sometimes launching circuits can fail
6919 immediately, e.g. because too many circuits have failed recently.
6920 - Fix a compile warning on 64 bit platforms.
6923 Changes in version 0.0.9pre2 - 2004-10-03
6925 - Make fetching a cached directory work for 64-bit platforms too.
6926 - Make zlib.h a required header, not an optional header.
6929 Changes in version 0.0.9pre1 - 2004-10-01
6931 - Stop using separate defaults for no-config-file and
6932 empty-config-file. Now you have to explicitly turn off SocksPort,
6933 if you don't want it open.
6934 - Fix a bug in OutboundBindAddress so it (hopefully) works.
6935 - Improve man page to mention more of the 0.0.8 features.
6936 - Fix a rare seg fault for people running hidden services on
6937 intermittent connections.
6938 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
6940 - Fix more dns related bugs: send back resolve_failed and end cells
6941 more reliably when the resolve fails, rather than closing the
6942 circuit and then trying to send the cell. Also attach dummy resolve
6943 connections to a circuit *before* calling dns_resolve(), to fix
6944 a bug where cached answers would never be sent in RESOLVED cells.
6945 - When we run out of disk space, or other log writing error, don't
6946 crash. Just stop logging to that log and continue.
6947 - We were starting to daemonize before we opened our logs, so if
6948 there were any problems opening logs, we would complain to stderr,
6949 which wouldn't work, and then mysteriously exit.
6950 - Fix a rare bug where sometimes a verified OR would connect to us
6951 before he'd uploaded his descriptor, which would cause us to
6952 assign conn->nickname as though he's unverified. Now we look through
6953 the fingerprint list to see if he's there.
6954 - Fix a rare assert trigger, where routerinfos for entries in
6955 our cpath would expire while we're building the path.
6958 - Clients can ask dirservers for /dir.z to get a compressed version
6959 of the directory. Only works for servers running 0.0.9, of course.
6960 - Make clients cache directories and use them to seed their router
6961 lists at startup. This means clients have a datadir again.
6962 - Configuration infrastructure support for warning on obsolete
6964 - Respond to content-encoding headers by trying to uncompress as
6966 - Reply with a deflated directory when a client asks for "dir.z".
6967 We could use allow-encodings instead, but allow-encodings isn't
6968 specified in HTTP 1.0.
6969 - Raise the max dns workers from 50 to 100.
6970 - Discourage people from setting their dirfetchpostperiod more often
6971 than once per minute.
6972 - Protect dirservers from overzealous descriptor uploading -- wait
6973 10 seconds after directory gets dirty, before regenerating.
6976 Changes in version 0.0.8 - 2004-08-25
6977 o Port it to SunOS 5.9 / Athena
6980 Changes in version 0.0.8rc2 - 2004-08-20
6981 o Make it compile on cygwin again.
6982 o When picking unverified routers, skip those with low uptime and/or
6983 low bandwidth, depending on what properties you care about.
6986 Changes in version 0.0.8rc1 - 2004-08-18
6987 o Changes from 0.0.7.3:
6989 - Fix assert triggers: if the other side returns an address 0.0.0.0,
6990 don't put it into the client dns cache.
6991 - If a begin failed due to exit policy, but we believe the IP address
6992 should have been allowed, switch that router to exitpolicy reject *:*
6993 until we get our next directory.
6995 - Clients choose nodes proportional to advertised bandwidth.
6996 - Avoid using nodes with low uptime as introduction points.
6997 - Handle servers with dynamic IP addresses: don't replace
6998 options->Address with the resolved one at startup, and
6999 detect our address right before we make a routerinfo each time.
7000 - 'FascistFirewall' option to pick dirservers and ORs on specific
7001 ports; plus 'FirewallPorts' config option to tell FascistFirewall
7002 which ports are open. (Defaults to 80,443)
7003 - Be more aggressive about trying to make circuits when the network
7004 has changed (e.g. when you unsuspend your laptop).
7005 - Check for time skew on http headers; report date in response to
7007 - If the entrynode config line has only one node, don't pick it as
7009 - Add strict{entry|exit}nodes config options. If set to 1, then
7010 we refuse to build circuits that don't include the specified entry
7012 - OutboundBindAddress config option, to bind to a specific
7013 IP address for outgoing connect()s.
7014 - End truncated log entries (e.g. directories) with "[truncated]".
7016 o Patches to 0.0.8preX:
7018 - Patches to compile and run on win32 again (maybe)?
7019 - Fix crash when looking for ~/.torrc with no $HOME set.
7020 - Fix a race bug in the unit tests.
7021 - Handle verified/unverified name collisions better when new
7022 routerinfo's arrive in a directory.
7023 - Sometimes routers were getting entered into the stats before
7024 we'd assigned their identity_digest. Oops.
7025 - Only pick and establish intro points after we've gotten a
7028 - AllowUnverifiedNodes config option to let circuits choose no-name
7029 routers in entry,middle,exit,introduction,rendezvous positions.
7030 Allow middle and rendezvous positions by default.
7031 - Add a man page for tor-resolve.
7034 Changes in version 0.0.7.3 - 2004-08-12
7035 o Stop dnsworkers from triggering an assert failure when you
7036 ask them to resolve the host "".
7039 Changes in version 0.0.8pre3 - 2004-08-09
7040 o Changes from 0.0.7.2:
7041 - Allow multiple ORs with same nickname in routerlist -- now when
7042 people give us one identity key for a nickname, then later
7043 another, we don't constantly complain until the first expires.
7044 - Remember used bandwidth (both in and out), and publish 15-minute
7045 snapshots for the past day into our descriptor.
7046 - You can now fetch $DIRURL/running-routers to get just the
7047 running-routers line, not the whole descriptor list. (But
7048 clients don't use this yet.)
7049 - When people mistakenly use Tor as an http proxy, point them
7050 at the tor-doc.html rather than the INSTALL.
7051 - Remove our mostly unused -- and broken -- hex_encode()
7052 function. Use base16_encode() instead. (Thanks to Timo Lindfors
7053 for pointing out this bug.)
7054 - Rotate onion keys every 12 hours, not every 2 hours, so we have
7055 fewer problems with people using the wrong key.
7056 - Change the default exit policy to reject the default edonkey,
7057 kazaa, gnutella ports.
7058 - Add replace_file() to util.[ch] to handle win32's rename().
7060 o Changes from 0.0.8preX:
7061 - Fix two bugs in saving onion keys to disk when rotating, so
7062 hopefully we'll get fewer people using old onion keys.
7063 - Fix an assert error that was making SocksPolicy not work.
7064 - Be willing to expire routers that have an open dirport -- it's
7065 just the authoritative dirservers we want to not forget.
7066 - Reject tor-resolve requests for .onion addresses early, so we
7067 don't build a whole rendezvous circuit and then fail.
7068 - When you're warning a server that he's unverified, don't cry
7070 - Fix a race condition: don't try to extend onto a connection
7071 that's still handshaking.
7072 - For servers in clique mode, require the conn to be open before
7073 you'll choose it for your path.
7074 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
7075 end relay cell, etc.
7076 - Measure bandwidth capacity over the last 24 hours, not just 12
7077 - Bugfix: authoritative dirservers were making and signing a new
7078 directory for each client, rather than reusing the cached one.
7081 Changes in version 0.0.8pre2 - 2004-08-04
7082 o Changes from 0.0.7.2:
7084 - Check directory signature _before_ you decide whether you're
7085 you're running an obsolete version and should exit.
7086 - Check directory signature _before_ you parse the running-routers
7087 list to decide who's running or verified.
7088 - Bugfixes and features:
7089 - Check return value of fclose while writing to disk, so we don't
7090 end up with broken files when servers run out of disk space.
7091 - Log a warning if the user uses an unsafe socks variant, so people
7092 are more likely to learn about privoxy or socat.
7093 - Dirservers now include RFC1123-style dates in the HTTP headers,
7094 which one day we will use to better detect clock skew.
7096 o Changes from 0.0.8pre1:
7097 - Make it compile without warnings again on win32.
7098 - Log a warning if you're running an unverified server, to let you
7099 know you might want to get it verified.
7100 - Only pick a default nickname if you plan to be a server.
7103 Changes in version 0.0.8pre1 - 2004-07-23
7105 - Made our unit tests compile again on OpenBSD 3.5, and tor
7106 itself compile again on OpenBSD on a sparc64.
7107 - We were neglecting milliseconds when logging on win32, so
7108 everything appeared to happen at the beginning of each second.
7111 - 'Extend' relay cell payloads now include the digest of the
7112 intended next hop's identity key. Now we can verify that we're
7113 extending to the right router, and also extend to routers we
7114 hadn't heard of before.
7117 - Tor nodes can now act as relays (with an advertised ORPort)
7118 without being manually verified by the dirserver operators.
7119 - Uploaded descriptors of unverified routers are now accepted
7120 by the dirservers, and included in the directory.
7121 - Verified routers are listed by nickname in the running-routers
7122 list; unverified routers are listed as "$<fingerprint>".
7123 - We now use hash-of-identity-key in most places rather than
7124 nickname or addr:port, for improved security/flexibility.
7125 - To avoid Sybil attacks, paths still use only verified servers.
7126 But now we have a chance to play around with hybrid approaches.
7127 - Nodes track bandwidth usage to estimate capacity (not used yet).
7128 - ClientOnly option for nodes that never want to become servers.
7129 - Directory caching.
7130 - "AuthoritativeDir 1" option for the official dirservers.
7131 - Now other nodes (clients and servers) will cache the latest
7132 directory they've pulled down.
7133 - They can enable their DirPort to serve it to others.
7134 - Clients will pull down a directory from any node with an open
7135 DirPort, and check the signature/timestamp correctly.
7136 - Authoritative dirservers now fetch directories from other
7137 authdirservers, to stay better synced.
7138 - Running-routers list tells who's down also, along with noting
7139 if they're verified (listed by nickname) or unverified (listed
7141 - Allow dirservers to serve running-router list separately.
7142 This isn't used yet.
7143 - ORs connect-on-demand to other ORs
7144 - If you get an extend cell to an OR you're not connected to,
7145 connect, handshake, and forward the create cell.
7146 - The authoritative dirservers stay connected to everybody,
7147 and everybody stays connected to 0.0.7 servers, but otherwise
7148 clients/servers expire unused connections after 5 minutes.
7149 - When servers get a sigint, they delay 30 seconds (refusing new
7150 connections) then exit. A second sigint causes immediate exit.
7151 - File and name management:
7152 - Look for .torrc if no CONFDIR "torrc" is found.
7153 - If no datadir is defined, then choose, make, and secure ~/.tor
7155 - If torrc not found, exitpolicy reject *:*.
7156 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
7157 - If no nickname is defined, derive default from hostname.
7158 - Rename secret key files, e.g. identity.key -> secret_id_key,
7159 to discourage people from mailing their identity key to tor-ops.
7160 - Refuse to build a circuit before the directory has arrived --
7161 it won't work anyway, since you won't know the right onion keys
7163 - Try other dirservers immediately if the one you try is down. This
7164 should tolerate down dirservers better now.
7165 - Parse tor version numbers so we can do an is-newer-than check
7166 rather than an is-in-the-list check.
7167 - New socks command 'resolve', to let us shim gethostbyname()
7169 - A 'tor_resolve' script to access the socks resolve functionality.
7170 - A new socks-extensions.txt doc file to describe our
7171 interpretation and extensions to the socks protocols.
7172 - Add a ContactInfo option, which gets published in descriptor.
7173 - Publish OR uptime in descriptor (and thus in directory) too.
7174 - Write tor version at the top of each log file
7175 - New docs in the tarball:
7177 - Document that you should proxy your SSL traffic too.
7180 Changes in version 0.0.7.2 - 2004-07-07
7181 o A better fix for the 0.0.0.0 problem, that will hopefully
7182 eliminate the remaining related assertion failures.
7185 Changes in version 0.0.7.1 - 2004-07-04
7186 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
7187 since internally we use 0.0.0.0 to signify "not yet resolved".
7190 Changes in version 0.0.7 - 2004-06-07
7191 o Updated the man page to reflect the new features.
7194 Changes in version 0.0.7rc2 - 2004-06-06
7195 o Changes from 0.0.7rc1:
7196 - Make it build on Win32 again.
7197 o Changes from 0.0.6.2:
7198 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
7202 Changes in version 0.0.7rc1 - 2004-06-02
7204 - On sighup, we were adding another log without removing the first
7205 one. So log messages would get duplicated n times for n sighups.
7206 - Several cases of using a connection after we'd freed it. The
7207 problem was that connections that are pending resolve are in both
7208 the pending_resolve tree, and also the circuit's resolving_streams
7209 list. When you want to remove one, you must remove it from both.
7210 - Fix a double-mark-for-close where an end cell arrived for a
7211 resolving stream, and then the resolve failed.
7212 - Check directory signatures based on name of signer, not on whom
7213 we got the directory from. This will let us cache directories more
7216 - Crank up some of our constants to handle more users.
7219 Changes in version 0.0.7pre1 - 2004-06-02
7220 o Fixes for crashes and other obnoxious bugs:
7221 - Fix an epipe bug: sometimes when directory connections failed
7222 to connect, we would give them a chance to flush before closing
7224 - When we detached from a circuit because of resolvefailed, we
7225 would immediately try the same circuit twice more, and then
7226 give up on the resolve thinking we'd tried three different
7228 - Limit the number of intro circuits we'll attempt to build for a
7229 hidden service per 15-minute period.
7230 - Check recommended-software string *early*, before actually parsing
7231 the directory. Thus we can detect an obsolete version and exit,
7232 even if the new directory format doesn't parse.
7233 o Fixes for security bugs:
7234 - Remember which nodes are dirservers when you startup, and if a
7235 random OR enables his dirport, don't automatically assume he's
7236 a trusted dirserver.
7238 - Directory connections were asking the wrong poll socket to
7239 start writing, and not asking themselves to start writing.
7240 - When we detached from a circuit because we sent a begin but
7241 didn't get a connected, we would use it again the first time;
7242 but after that we would correctly switch to a different one.
7243 - Stop warning when the first onion decrypt attempt fails; they
7244 will sometimes legitimately fail now that we rotate keys.
7245 - Override unaligned-access-ok check when $host_cpu is ia64 or
7246 arm. Apparently they allow it but the kernel whines.
7247 - Dirservers try to reconnect periodically too, in case connections
7249 - Fix some memory leaks in directory servers.
7250 - Allow backslash in Win32 filenames.
7251 - Made Tor build complain-free on FreeBSD, hopefully without
7252 breaking other BSD builds. We'll see.
7254 - Doxygen markup on all functions and global variables.
7255 - Make directory functions update routerlist, not replace it. So
7256 now directory disagreements are not so critical a problem.
7257 - Remove the upper limit on number of descriptors in a dirserver's
7258 directory (not that we were anywhere close).
7259 - Allow multiple logfiles at different severity ranges.
7260 - Allow *BindAddress to specify ":port" rather than setting *Port
7261 separately. Allow multiple instances of each BindAddress config
7262 option, so you can bind to multiple interfaces if you want.
7263 - Allow multiple exit policy lines, which are processed in order.
7264 Now we don't need that huge line with all the commas in it.
7265 - Enable accept/reject policies on SOCKS connections, so you can bind
7266 to 0.0.0.0 but still control who can use your OP.
7269 Changes in version 0.0.6.2 - 2004-05-16
7270 o Our integrity-checking digest was checking only the most recent cell,
7271 not the previous cells like we'd thought.
7272 Thanks to Stefan Mark for finding the flaw!
7275 Changes in version 0.0.6.1 - 2004-05-06
7276 o Fix two bugs in our AES counter-mode implementation (this affected
7277 onion-level stream encryption, but not TLS-level). It turns
7278 out we were doing something much more akin to a 16-character
7279 polyalphabetic cipher. Oops.
7280 Thanks to Stefan Mark for finding the flaw!
7281 o Retire moria3 as a directory server, and add tor26 as a directory
7285 Changes in version 0.0.6 - 2004-05-02
7289 Changes in version 0.0.6rc4 - 2004-05-01
7290 o Update the built-in dirservers list to use the new directory format
7291 o Fix a rare seg fault: if a node offering a hidden service attempts
7292 to build a circuit to Alice's rendezvous point and fails before it
7293 reaches the last hop, it retries with a different circuit, but
7295 o Handle windows socket errors correctly.
7298 Changes in version 0.0.6rc3 - 2004-04-28
7299 o Don't expire non-general excess circuits (if we had enough
7300 circuits open, we were expiring rendezvous circuits -- even
7301 when they had a stream attached. oops.)
7302 o Fetch randomness from /dev/urandom better (not via fopen/fread)
7303 o Better debugging for tls errors
7304 o Some versions of openssl have an SSL_pending function that erroneously
7305 returns bytes when there is a non-application record pending.
7306 o Set Content-Type on the directory and hidserv descriptor.
7307 o Remove IVs from cipher code, since AES-ctr has none.
7308 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
7309 o We were using an array of length zero in a few places.
7310 o win32's gethostbyname can't resolve an IP to an IP.
7311 o win32's close can't close a socket.
7314 Changes in version 0.0.6rc2 - 2004-04-26
7315 o Fix a bug where we were closing tls connections intermittently.
7316 It turns out openssl keeps its errors around -- so if an error
7317 happens, and you don't ask about it, and then another openssl
7318 operation happens and succeeds, and you ask if there was an error,
7319 it tells you about the first error. Fun fun.
7320 o Fix a bug that's been lurking since 27 may 03 (!)
7321 When passing back a destroy cell, we would use the wrong circ id.
7322 'Mostly harmless', but still worth fixing.
7323 o Since we don't support truncateds much, don't bother sending them;
7324 just close the circ.
7325 o check for <machine/limits.h> so we build on NetBSD again (I hope).
7326 o don't crash if a conn that sent a begin has suddenly lost its circuit
7327 (this was quite rare).
7330 Changes in version 0.0.6rc1 - 2004-04-25
7331 o We now rotate link (tls context) keys and onion keys.
7332 o CREATE cells now include oaep padding, so you can tell
7333 if you decrypted them correctly.
7334 o Add bandwidthburst to server descriptor.
7335 o Directories now say which dirserver signed them.
7336 o Use a tor_assert macro that logs failed assertions too.
7339 Changes in version 0.0.6pre5 - 2004-04-18
7340 o changes from 0.0.6pre4:
7341 - make tor build on broken freebsd 5.2 installs
7342 - fix a failed assert when you try an intro point, get a nack, and try
7343 a second one and it works.
7344 - when alice uses a port that the hidden service doesn't accept,
7345 it now sends back an end cell (denied by exit policy). otherwise
7346 alice would just have to wait to time out.
7347 - fix another rare bug: when we had tried all the intro
7348 points for a hidden service, we fetched the descriptor
7349 again, but we left our introcirc thinking it had already
7350 sent an intro, so it kept waiting for a response...
7351 - bugfix: when you sleep your hidden-service laptop, as soon
7352 as it wakes up it tries to upload a service descriptor, but
7353 socketpair fails for some reason (localhost not up yet?).
7354 now we simply give up on that upload, and we'll try again later.
7355 i'd still like to find the bug though.
7356 - if an intro circ waiting for an ack dies before getting one, then
7358 - we were reusing stale service descriptors and refetching usable
7362 Changes in version 0.0.6pre4 - 2004-04-14
7363 o changes from 0.0.6pre3:
7364 - when bob fails to connect to the rendezvous point, and his
7365 circ didn't fail because of the rendezvous point itself, then
7366 he retries a couple of times
7367 - we expire introduction and rendezvous circs more thoroughly
7368 (sometimes they were hanging around forever)
7369 - we expire unattached rendezvous streams that have been around
7370 too long (they were sticking around forever).
7371 - fix a measly fencepost error that was crashing everybody with
7375 Changes in version 0.0.6pre3 - 2004-04-14
7376 o changes from 0.0.6pre2:
7377 - make hup work again
7378 - fix some memory leaks for dirservers
7379 - allow more skew in rendezvous descriptor timestamps, to help
7380 handle people like blanu who don't know what time it is
7381 - normal circs are 3 hops, but some rend/intro circs are 4, if
7382 the initiator doesn't get to choose the last hop
7383 - send acks for introductions, so alice can know whether to try
7385 - bob publishes intro points more correctly
7386 o changes from 0.0.5:
7387 - fix an assert trigger that's been plaguing us since the days
7388 of 0.0.2prexx (thanks weasel!)
7389 - retry stream correctly when we fail to connect because of
7390 exit-policy-reject (should try another) or can't-resolve-address
7391 (also should try another, because dns on random internet servers
7393 - when we hup a dirserver and we've *removed* a server from the
7394 approved-routers list, now we remove that server from the
7395 in-memory directories too
7398 Changes in version 0.0.6pre2 - 2004-04-08
7399 o We fixed our base32 implementation. Now it works on all architectures.
7402 Changes in version 0.0.6pre1 - 2004-04-08
7404 - Hidden services and rendezvous points are implemented. Go to
7405 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
7406 hidden services. (This only works via a socks4a proxy such as
7407 Privoxy, and currently it's quite slow.)
7410 Changes in version 0.0.5 - 2004-03-30
7414 Changes in version 0.0.5rc3 - 2004-03-29
7415 o Install torrc as torrc.sample -- we no longer clobber your
7417 o Re-enable recommendedversion checking (we broke it in rc2, oops)
7418 o Add in a 'notice' log level for things the operator should hear
7419 but that aren't warnings
7422 Changes in version 0.0.5rc2 - 2004-03-29
7423 o Hold socks connection open until reply is flushed (if possible)
7424 o Make exit nodes resolve IPs to IPs immediately, rather than asking
7425 the dns farm to do it.
7426 o Fix c99 aliasing warnings in rephist.c
7427 o Don't include server descriptors that are older than 24 hours in the
7429 o Give socks 'reject' replies their whole 15s to attempt to flush,
7430 rather than seeing the 60s timeout and assuming the flush had failed.
7431 o Clean automake droppings from the cvs repository
7434 Changes in version 0.0.5rc1 - 2004-03-28
7435 o Fix mangled-state bug in directory fetching (was causing sigpipes).
7436 o Only build circuits after we've fetched the directory: clients were
7437 using only the directory servers before they'd fetched a directory.
7438 This also means longer startup time; so it goes.
7439 o Fix an assert trigger where an OP would fail to handshake, and we'd
7440 expect it to have a nickname.
7441 o Work around a tsocks bug: do a socks reject when AP connection dies
7442 early, else tsocks goes into an infinite loop.
7445 Changes in version 0.0.4 - 2004-03-26
7446 o When connecting to a dirserver or OR and the network is down,
7450 Changes in version 0.0.3 - 2004-03-26
7451 o Warn and fail if server chose a nickname with illegal characters
7452 o Port to Solaris and Sparc:
7453 - include missing header fcntl.h
7454 - have autoconf find -lsocket -lnsl automatically
7455 - deal with hardware word alignment
7456 - make uname() work (solaris has a different return convention)
7457 - switch from using signal() to sigaction()
7458 o Preliminary work on reputation system:
7459 - Keep statistics on success/fail of connect attempts; they're published
7460 by kill -USR1 currently.
7461 - Add a RunTesting option to try to learn link state by creating test
7462 circuits, even when SocksPort is off.
7463 - Remove unused open circuits when there are too many.
7466 Changes in version 0.0.2 - 2004-03-19
7467 - Include strlcpy and strlcat for safer string ops
7468 - define INADDR_NONE so we compile (but still not run) on solaris
7471 Changes in version 0.0.2pre27 - 2004-03-14
7473 - Allow internal tor networks (we were rejecting internal IPs,
7474 now we allow them if they're set explicitly).
7475 - And fix a few endian issues.
7478 Changes in version 0.0.2pre26 - 2004-03-14
7480 - If a stream times out after 15s without a connected cell, don't
7481 try that circuit again: try a new one.
7482 - Retry streams at most 4 times. Then give up.
7483 - When a dirserver gets a descriptor from an unknown router, it
7484 logs its fingerprint (so the dirserver operator can choose to
7485 accept it even without mail from the server operator).
7486 - Inform unapproved servers when we reject their descriptors.
7487 - Make tor build on Windows again. It works as a client, who knows
7489 - Clearer instructions in the torrc for how to set up a server.
7490 - Be more efficient about reading fd's when our global token bucket
7491 (used for rate limiting) becomes empty.
7493 - Stop asserting that computers always go forward in time. It's
7495 - When we sent a cell (e.g. destroy) and then marked an OR connection
7496 expired, we might close it before finishing a flush if the other
7497 side isn't reading right then.
7498 - Don't allow dirservers to start if they haven't defined
7500 - We were caching transient dns failures. Oops.
7501 - Prevent servers from publishing an internal IP as their address.
7502 - Address a strcat vulnerability in circuit.c
7505 Changes in version 0.0.2pre25 - 2004-03-04
7507 - Put the OR's IP in its router descriptor, not its fqdn. That way
7508 we'll stop being stalled by gethostbyname for nodes with flaky dns,
7511 - If the user typed in an address that didn't resolve, the server
7515 Changes in version 0.0.2pre24 - 2004-03-03
7517 - Fix an assertion failure in dns.c, where we were trying to dequeue
7518 a pending dns resolve even if it wasn't pending
7519 - Fix a spurious socks5 warning about still trying to write after the
7520 connection is finished.
7521 - Hold certain marked_for_close connections open until they're finished
7522 flushing, rather than losing bytes by closing them too early.
7523 - Correctly report the reason for ending a stream
7524 - Remove some duplicate calls to connection_mark_for_close
7525 - Put switch_id and start_daemon earlier in the boot sequence, so it
7526 will actually try to chdir() to options.DataDirectory
7527 - Make 'make test' exit(1) if a test fails; fix some unit tests
7528 - Make tor fail when you use a config option it doesn't know about,
7529 rather than warn and continue.
7530 - Make --version work
7531 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
7534 Changes in version 0.0.2pre23 - 2004-02-29
7536 - Print a statement when the first circ is finished, so the user
7538 - If a relay cell is unrecognized at the end of the circuit,
7539 send back a destroy. (So attacks to mutate cells are more
7541 - New config option 'excludenodes' to avoid certain nodes for circuits.
7542 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
7543 so you can collect coredumps there.
7545 - Fix a bug in tls flushing where sometimes data got wedged and
7546 didn't flush until more data got sent. Hopefully this bug was
7547 a big factor in the random delays we were seeing.
7548 - Make 'connected' cells include the resolved IP, so the client
7549 dns cache actually gets populated.
7550 - Disallow changing from ORPort=0 to ORPort>0 on hup.
7551 - When we time-out on a stream and detach from the circuit, send an
7552 end cell down it first.
7553 - Only warn about an unknown router (in exitnodes, entrynodes,
7554 excludenodes) after we've fetched a directory.
7557 Changes in version 0.0.2pre22 - 2004-02-26
7559 - Servers publish less revealing uname information in descriptors.
7560 - More memory tracking and assertions, to crash more usefully when
7562 - If the default torrc isn't there, just use some default defaults.
7563 Plus provide an internal dirservers file if they don't have one.
7564 - When the user tries to use Tor as an http proxy, give them an http
7565 501 failure explaining that we're a socks proxy.
7566 - Dump a new router.desc on hup, to help confused people who change
7567 their exit policies and then wonder why router.desc doesn't reflect
7569 - Clean up the generic tor.sh init script that we ship with.
7571 - If the exit stream is pending on the resolve, and a destroy arrives,
7572 then the stream wasn't getting removed from the pending list. I
7573 think this was the one causing recent server crashes.
7574 - Use a more robust poll on OSX 10.3, since their poll is flaky.
7575 - When it couldn't resolve any dirservers, it was useless from then on.
7576 Now it reloads the RouterFile (or default dirservers) if it has no
7578 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
7579 many users don't even *have* a /usr/local/sbin/.
7582 Changes in version 0.0.2pre21 - 2004-02-18
7584 - There's a ChangeLog file that actually reflects the changelog.
7585 - There's a 'torify' wrapper script, with an accompanying
7586 tor-tsocks.conf, that simplifies the process of using tsocks for
7587 tor. It even has a man page.
7588 - The tor binary gets installed to sbin rather than bin now.
7589 - Retry streams where the connected cell hasn't arrived in 15 seconds
7590 - Clean up exit policy handling -- get the default out of the torrc,
7591 so we can update it without forcing each server operator to fix
7593 - Allow imaps and pop3s in default exit policy
7595 - Prevent picking middleman nodes as the last node in the circuit
7598 Changes in version 0.0.2pre20 - 2004-01-30
7600 - We now have a deb package, and it's in debian unstable. Go to
7602 - I've split the TotalBandwidth option into BandwidthRate (how many
7603 bytes per second you want to allow, long-term) and
7604 BandwidthBurst (how many bytes you will allow at once before the cap
7605 kicks in). This better token bucket approach lets you, say, set
7606 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
7607 performance while not exceeding your monthly bandwidth quota.
7608 - Push out a tls record's worth of data once you've got it, rather
7609 than waiting until you've read everything waiting to be read. This
7610 may improve performance by pipelining better. We'll see.
7611 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
7612 from failed circuits (if they haven't been connected yet) and attach
7614 - Expire old streams that haven't managed to connect. Some day we'll
7615 have them reattach to new circuits instead.
7618 - Fix several memory leaks that were causing servers to become bloated
7620 - Fix a few very rare assert triggers. A few more remain.
7621 - Setuid to User _before_ complaining about running as root.
7624 Changes in version 0.0.2pre19 - 2004-01-07
7626 - Fix deadlock condition in dns farm. We were telling a child to die by
7627 closing the parent's file descriptor to him. But newer children were
7628 inheriting the open file descriptor from the parent, and since they
7629 weren't closing it, the socket never closed, so the child never read
7630 eof, so he never knew to exit. Similarly, dns workers were holding
7631 open other sockets, leading to all sorts of chaos.
7632 - New cleaner daemon() code for forking and backgrounding.
7633 - If you log to a file, it now prints an entry at the top of the
7634 logfile so you know it's working.
7635 - The onionskin challenge length was 30 bytes longer than necessary.
7636 - Started to patch up the spec so it's not quite so out of date.
7639 Changes in version 0.0.2pre18 - 2004-01-02
7641 - Fix endian issues with the 'integrity' field in the relay header.
7642 - Fix a potential bug where connections in state
7643 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
7646 Changes in version 0.0.2pre17 - 2003-12-30
7648 - Made --debuglogfile (or any second log file, actually) work.
7649 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
7650 adversary could force us into an infinite loop.
7653 - Each onionskin handshake now includes a hash of the computed key,
7654 to prove the server's identity and help perfect forward secrecy.
7655 - Changed cell size from 256 to 512 bytes (working toward compatibility
7657 - Changed cell length to 2 bytes, and moved it to the relay header.
7658 - Implemented end-to-end integrity checking for the payloads of
7660 - Separated streamid from 'recognized' (otherwise circuits will get
7661 messed up when we try to have streams exit from the middle). We
7662 use the integrity-checking to confirm that a cell is addressed to
7664 - Randomize the initial circid and streamid values, so an adversary who
7665 breaks into a node can't learn how many circuits or streams have
7669 Changes in version 0.0.2pre16 - 2003-12-14
7671 - Fixed a bug that made HUP trigger an assert
7672 - Fixed a bug where a circuit that immediately failed wasn't being
7673 counted as a failed circuit in counting retries.
7676 - Now we close the circuit when we get a truncated cell: otherwise we're
7677 open to an anonymity attack where a bad node in the path truncates
7678 the circuit and then we open streams at him.
7679 - Add port ranges to exit policies
7680 - Add a conservative default exit policy
7681 - Warn if you're running tor as root
7682 - on HUP, retry OR connections and close/rebind listeners
7683 - options.EntryNodes: try these nodes first when picking the first node
7684 - options.ExitNodes: if your best choices happen to include any of
7685 your preferred exit nodes, you choose among just those preferred
7687 - options.ExcludedNodes: nodes that are never picked in path building
7690 Changes in version 0.0.2pre15 - 2003-12-03
7691 o Robustness and bugfixes:
7692 - Sometimes clients would cache incorrect DNS resolves, which would
7693 really screw things up.
7694 - An OP that goes offline would slowly leak all its sockets and stop
7696 - A wide variety of bugfixes in exit node selection, exit policy
7697 handling, and processing pending streams when a new circuit is
7699 - Pick nodes for a path only from those the directory says are up
7700 - Choose randomly from all running dirservers, not always the first one
7701 - Increase allowed http header size for directory fetch.
7702 - Stop writing to stderr (if we're daemonized it will be closed).
7703 - Enable -g always, so cores will be more useful to me.
7704 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
7707 - Wrote a man page. It lists commonly used options.
7710 - Change default loglevel to warn.
7711 - Make PidFile default to null rather than littering in your CWD.
7712 - OnionRouter config option is now obsolete. Instead it just checks
7714 - Moved to a single unified torrc file for both clients and servers.
7717 Changes in version 0.0.2pre14 - 2003-11-29
7718 o Robustness and bugfixes:
7719 - Force the admin to make the DataDirectory himself
7720 - to get ownership/permissions right
7721 - so clients no longer make a DataDirectory and then never use it
7722 - fix bug where a client who was offline for 45 minutes would never
7723 pull down a directory again
7724 - fix (or at least hide really well) the dns assert bug that was
7725 causing server crashes
7726 - warnings and improved robustness wrt clockskew for certs
7727 - use the native daemon(3) to daemonize, when available
7728 - exit if bind() fails
7729 - exit if neither socksport nor orport is defined
7730 - include our own tor_timegm (Win32 doesn't have its own)
7731 - bugfix for win32 with lots of connections
7732 - fix minor bias in PRNG
7733 - make dirserver more robust to corrupt cached directory
7736 - Wrote the design document (woo)
7738 o Circuit building and exit policies:
7739 - Circuits no longer try to use nodes that the directory has told them
7741 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
7742 bitcounts (18.0.0.0/8).
7743 - Make AP connections standby for a circuit if no suitable circuit
7744 exists, rather than failing
7745 - Circuits choose exit node based on addr/port, exit policies, and
7746 which AP connections are standing by
7747 - Bump min pathlen from 2 to 3
7748 - Relay end cells have a payload to describe why the stream ended.
7749 - If the stream failed because of exit policy, try again with a new
7751 - Clients have a dns cache to remember resolved addresses.
7752 - Notice more quickly when we have no working circuits
7755 - APPort is now called SocksPort
7756 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
7758 - RecommendedVersions is now a config variable rather than
7759 hardcoded (for dirservers)
7760 - Reloads config on HUP
7761 - Usage info on -h or --help
7762 - If you set User and Group config vars, it'll setu/gid to them.
7765 Changes in version 0.0.2pre13 - 2003-10-19
7766 o General stability:
7767 - SSL_write no longer fails when it returns WANTWRITE and the number
7768 of bytes in the buf has changed by the next SSL_write call.
7769 - Fix segfault fetching directory when network is down
7770 - Fix a variety of minor memory leaks
7771 - Dirservers reload the fingerprints file on HUP, so I don't have
7772 to take down the network when I approve a new router
7773 - Default server config file has explicit Address line to specify fqdn
7776 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
7777 - Make listener connections not ever alloc bufs
7779 o Autoconf improvements:
7780 - don't clobber an external CFLAGS in ./configure
7781 - Make install now works
7782 - create var/lib/tor on make install
7783 - autocreate a tor.sh initscript to help distribs
7784 - autocreate the torrc and sample-server-torrc with correct paths
7786 o Log files and Daemonizing now work:
7787 - If --DebugLogFile is specified, log to it at -l debug
7788 - If --LogFile is specified, use it instead of commandline
7789 - If --RunAsDaemon is set, tor forks and backgrounds on startup