1 Changes in version 0.2.0.10-alpha - 2007-1?-??
3 - Stop servers from crashing if they set a Family option (or
4 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
8 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
9 it, it had no AES, and it hasn't seen any security patches since 2004.
12 - Directory authorities now decide whether routers are stable enough to
13 be guards based not on their MTBF or their uptime, but on their
14 fractional uptime: the fraction of the time that they are online.
15 - Clients new hold circuitless TLS connections open for 1.5 times
16 MaxCircuitDirtiness, since it is likely that they'll need to build
17 a circuit over them within that timeframe. Previously, they held them
18 open only for KeepalivePeriod.
21 - Refuse to start if both ORPort and UseBridges are set. Bugfix
23 - Better log message on vote from unknown authority.
25 o Minor bugfixes (memory leaks):
26 - Stop leaking memory every time we parse a v3 certificate. Bugfix
28 - Stop leaking memory every time we load a v3 certificate. Bugfix
29 on 0.2.0.1-alpha. Fixes Bug 536
30 - Stop leaking a cached networkstatus on exit. Bugfix on
32 - Stop leaking voter information every time we free a consensus. Bugfix
34 - Stop leaking signed data every time we check a voter signature.
35 Bugfix on 0.2.0.3-alpha.
36 - Stop leaking a signature every time we fail to parse a consensus or
37 a vote. Bugfix on 0.2.0.3-alpha.
38 - Stop leaking v2_download_status_map on shutdown. Bugfix on
42 Changes in version 0.2.0.9-alpha - 2007-10-24
43 This ninth development snapshot switches clients to the new v3 directory
44 system; allows servers to be listed in the network status even when they
45 have the same nickname as a registered server; and fixes many other
46 bugs including a big one that was causing some servers to disappear
47 from the network status lists for a few hours each day.
49 o Major features (directory system):
50 - Clients now download v3 consensus networkstatus documents instead
51 of v2 networkstatus documents. Clients and caches now base their
52 opinions about routers on these consensus documents. Clients only
53 download router descriptors listed in the consensus.
54 - Authorities now list servers who have the same nickname as
55 a different named server, but list them with a new flag,
56 "Unnamed". Now we can list servers that happen to pick the same
57 nickname as a server that registered two years ago and then
58 disappeared. Partially implements proposal 122.
59 - If the consensus list a router as "Unnamed", the name is assigned
60 to a different router: do not identify the router by that name.
61 Partially implements proposal 122.
62 - Authorities can now come to a consensus on which method to use to
63 compute the consensus. This gives us forward compatibility.
66 - Stop publishing a new server descriptor just because we HUP or
67 when we find our DirPort to be reachable but won't actually publish
68 it. New descriptors without any real changes are dropped by the
69 authorities, and can screw up our "publish every 18 hours" schedule.
71 - When a router wasn't listed in a new networkstatus, we were leaving
72 the flags for that router alone -- meaning it remained Named,
73 Running, etc -- even though absence from the networkstatus means
74 that it shouldn't be considered to exist at all anymore. Now we
75 clear all the flags for routers that fall out of the networkstatus
76 consensus. Fixes bug 529; bugfix on 0.1.2.x.
77 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
78 extrainfo documents and then discard them immediately for not
79 matching the latest router. Bugfix on 0.2.0.1-alpha.
81 o Minor features (v3 directory protocol):
82 - Allow tor-gencert to generate a new certificate without replacing
84 - Allow certificates to include an address.
85 - When we change our directory-cache settings, reschedule all voting
86 and download operations.
87 - Reattempt certificate downloads immediately on failure, as long as
88 we haven't failed a threshold number of times yet.
89 - Delay retrying consensus downloads while we're downloading
90 certificates to verify the one we just got. Also, count getting a
91 consensus that we already have (or one that isn't valid) as a failure,
92 and count failing to get the certificates after 20 minutes as a
94 - Build circuits and download descriptors even if our consensus is a
95 little expired. (This feature will go away once authorities are
98 o Minor features (router descriptor cache):
99 - If we find a cached-routers file that's been sitting around for more
100 than 28 days unmodified, then most likely it's a leftover from
101 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
103 - When we (as a cache) download a descriptor because it was listed
104 in a consensus, remember when the consensus was supposed to expire,
105 and don't expire the descriptor until then.
107 o Minor features (performance):
108 - Call routerlist_remove_old_routers() much less often. This should
109 speed startup, especially on directory caches.
110 - Don't try to launch new descriptor downloads quite so often when we
111 already have enough directory information to build circuits.
112 - Base64 decoding was actually showing up on our profile when parsing
113 the initial descriptor file; switch to an in-process all-at-once
114 implementation that's about 3.5x times faster than calling out to
117 o Minor features (compilation):
118 - Detect non-ASCII platforms (if any still exist) and refuse to
119 build there: some of our code assumes that 'A' is 65 and so on.
121 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
122 - Make the "next period" votes into "current period" votes immediately
123 after publishing the consensus; avoid a heisenbug that made them
124 stick around indefinitely.
125 - When we discard a vote as a duplicate, do not report this as
127 - Treat missing v3 keys or certificates as an error when running as a
128 v3 directory authority.
129 - When we're configured to be a v3 authority, but we're only listed
130 as a non-v3 authority in our DirServer line for ourself, correct
132 - If an authority doesn't have a qualified hostname, just put
133 its address in the vote. This fixes the problem where we referred to
134 "moria on moria:9031."
135 - Distinguish between detached signatures for the wrong period, and
136 detached signatures for a divergent vote.
137 - Fix a small memory leak when computing a consensus.
138 - When there's no concensus, we were forming a vote every 30
139 minutes, but writing the "valid-after" line in our vote based
140 on our configured V3AuthVotingInterval: so unless the intervals
141 matched up, we immediately rejected our own vote because it didn't
142 start at the voting interval that caused us to construct a vote.
144 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
145 - Delete unverified-consensus when the real consensus is set.
146 - Consider retrying a consensus networkstatus fetch immediately
147 after one fails: don't wait 60 seconds to notice.
148 - When fetching a consensus as a cache, wait until a newer consensus
149 should exist before trying to replace the current one.
150 - Use a more forgiving schedule for retrying failed consensus
151 downloads than for other types.
153 o Minor bugfixes (other directory issues):
154 - Correct the implementation of "download votes by digest." Bugfix on
156 - Authorities no longer send back "400 you're unreachable please fix
157 it" errors to Tor servers that aren't online all the time. We're
158 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
160 o Minor bugfixes (controller):
161 - Don't reset trusted dir server list when we set a configuration
162 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
163 - Respond to INT and TERM SIGNAL commands before we execute the
164 signal, in case the signal shuts us down. We had a patch in
165 0.1.2.1-alpha that tried to do this by queueing the response on
166 the connection's buffer before shutting down, but that really
167 isn't the same thing at all. Bug located by Matt Edman.
169 o Minor bugfixes (misc):
170 - Correctly check for bad options to the "PublishServerDescriptor"
171 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
172 - Stop leaking memory on failing case of base32_decode, and make
173 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
174 - Don't try to download extrainfo documents when we're trying to
175 fetch enough directory info to build a circuit: having enough
176 info should get priority. Bugfix on 0.2.0.x.
177 - Don't complain that "your server has not managed to confirm that its
178 ports are reachable" if we haven't been able to build any circuits
179 yet. Bug found by spending four hours without a v3 consensus. Bugfix
181 - Detect the reason for failing to mmap a descriptor file we just
182 wrote, and give a more useful log message. Fixes bug 533. Bugfix
185 o Code simplifications and refactoring:
186 - Remove support for the old bw_accounting file: we've been storing
187 bandwidth accounting information in the state file since
188 0.1.2.5-alpha. This may result in bandwidth accounting errors
189 if you try to upgrade from 0.1.1.x or earlier, or if you try to
190 downgrade to 0.1.1.x or earlier.
191 - New convenience code to locate a file within the DataDirectory.
192 - Move non-authority functionality out of dirvote.c.
193 - Refactor the arguments for router_pick_{directory_|trusteddir}server
194 so that they all take the same named flags.
197 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
198 Unix users an easy way to script their Tor process (e.g. by
199 adjusting bandwidth based on the time of the day).
202 Changes in version 0.2.0.8-alpha - 2007-10-12
203 This eighth development snapshot fixes a crash bug that's been bothering
204 us since February 2007, lets bridge authorities store a list of bridge
205 descriptors they've seen, gets v3 directory voting closer to working,
206 starts caching v3 directory consensus documents on directory mirrors,
207 and fixes a variety of smaller issues including some minor memory leaks.
209 o Major features (router descriptor cache):
210 - Store routers in a file called cached-descriptors instead of in
211 cached-routers. Initialize cached-descriptors from cached-routers
212 if the old format is around. The new format allows us to store
213 annotations along with descriptors.
214 - Use annotations to record the time we received each descriptor, its
215 source, and its purpose.
216 - Disable the SETROUTERPURPOSE controller command: it is now
218 - Controllers should now specify cache=no or cache=yes when using
219 the +POSTDESCRIPTOR command.
220 - Bridge authorities now write bridge descriptors to disk, meaning
221 we can export them to other programs and begin distributing them
224 o Major features (directory authorities):
225 - When a v3 authority is missing votes or signatures, it now tries
227 - Directory authorities track weighted fractional uptime as well as
228 weighted mean-time-between failures. WFU is suitable for deciding
229 whether a node is "usually up", while MTBF is suitable for deciding
230 whether a node is "likely to stay up." We need both, because
231 "usually up" is a good requirement for guards, while "likely to
232 stay up" is a good requirement for long-lived connections.
234 o Major features (v3 directory system):
235 - Caches now download v3 network status documents as needed,
236 and download the descriptors listed in them.
237 - All hosts now attempt to download and keep fresh v3 authority
238 certificates, and re-attempt after failures.
239 - More internal-consistency checks for vote parsing.
241 o Major bugfixes (crashes):
242 - If a connection is shut down abruptly because of something that
243 happened inside connection_flushed_some(), do not call
244 connection_finished_flushing(). Should fix bug 451. Bugfix on
247 o Major bugfixes (performance):
248 - Fix really bad O(n^2) performance when parsing a long list of
249 routers: Instead of searching the entire list for an "extra-info "
250 string which usually wasn't there, once for every routerinfo
251 we read, just scan lines forward until we find one we like.
253 - When we add data to a write buffer in response to the data on that
254 write buffer getting low because of a flush, do not consider the
255 newly added data as a candidate for immediate flushing, but rather
256 make it wait until the next round of writing. Otherwise, we flush
257 and refill recursively, and a single greedy TLS connection can
258 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
260 o Minor features (v3 authority system):
261 - Add more ways for tools to download the votes that lead to the
263 - Send a 503 when low on bandwidth and a vote, consensus, or
264 certificate is requested.
265 - If-modified-since is now implemented properly for all kinds of
266 certificate requests.
268 o Minor bugfixes (network statuses):
269 - Tweak the implementation of proposal 109 slightly: allow at most
270 two Tor servers on the same IP address, except if it's the location
271 of a directory authority, in which case allow five. Bugfix on
274 o Minor bugfixes (controller):
275 - When sending a status event to the controller telling it that an
276 OR address is reachable, set the port correctly. (Previously we
277 were reporting the dir port.) Bugfix on 0.1.2.x.
279 o Minor bugfixes (v3 directory system):
280 - Fix logic to look up a cert by its signing key digest. Bugfix on
282 - Only change the reply to a vote to "OK" if it's not already
283 set. This gets rid of annoying "400 OK" log messages, which may
284 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
285 - When we get a valid consensus, recompute the voting schedule.
286 - Base the valid-after time of a vote on the consensus voting
287 schedule, not on our preferred schedule.
288 - Make the return values and messages from signature uploads and
289 downloads more sensible.
290 - Fix a memory leak when serving votes and consensus documents, and
291 another when serving certificates.
293 o Minor bugfixes (performance):
294 - Use a slightly simpler string hashing algorithm (copying Python's
295 instead of Java's) and optimize our digest hashing algorithm to take
296 advantage of 64-bit platforms and to remove some possibly-costly
298 - Fix a minor memory leak whenever we parse guards from our state
299 file. Bugfix on 0.2.0.7-alpha.
300 - Fix a minor memory leak whenever we write out a file. Bugfix on
302 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
303 command. Bugfix on 0.2.0.5-alpha.
305 o Minor bugfixes (portability):
306 - On some platforms, accept() can return a broken address. Detect
307 this more quietly, and deal accordingly. Fixes bug 483.
308 - Stop calling tor_strlower() on uninitialized memory in some cases.
309 Bugfix in 0.2.0.7-alpha.
311 o Minor bugfixes (usability):
312 - Treat some 403 responses from directory servers as INFO rather than
313 WARN-severity events.
314 - It's not actually an error to find a non-pending entry in the DNS
315 cache when canceling a pending resolve. Don't log unless stuff is
316 fishy. Resolves bug 463.
318 o Minor bugfixes (anonymity):
319 - Never report that we've used more bandwidth than we're willing to
320 relay: it leaks how much non-relay traffic we're using. Resolves
322 - When looking for a circuit to cannibalize, consider family as well
323 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
324 circuit cannibalization).
326 o Code simplifications and refactoring:
327 - Make a bunch of functions static. Remove some dead code.
328 - Pull out about a third of the really big routerlist.c; put it in a
329 new module, networkstatus.c.
330 - Merge the extra fields in local_routerstatus_t back into
331 routerstatus_t: we used to need one routerstatus_t for each
332 authority's opinion, plus a local_routerstatus_t for the locally
333 computed consensus opinion. To save space, we put the locally
334 modified fields into local_routerstatus_t, and only the common
335 stuff into routerstatus_t. But once v3 directories are in use,
336 clients and caches will no longer need to hold authority opinions;
337 thus, the rationale for keeping the types separate is now gone.
338 - Make the code used to reschedule and reattempt downloads more
340 - Turn all 'Are we a directory server/mirror?' logic into a call to
342 - Remove the code to generate the oldest (v1) directory format.
343 The code has been disabled since 0.2.0.5-alpha.
346 Changes in version 0.2.0.7-alpha - 2007-09-21
347 This seventh development snapshot makes bridges work again, makes bridge
348 authorities work for the first time, fixes two huge performance flaws
349 in hidden services, and fixes a variety of minor issues.
351 o New directory authorities:
352 - Set up moria1 and tor26 as the first v3 directory authorities. See
353 doc/spec/dir-spec.txt for details on the new directory design.
355 o Major bugfixes (crashes):
356 - Fix possible segfaults in functions called from
357 rend_process_relay_cell(). Bugfix on 0.1.2.x.
359 o Major bugfixes (bridges):
360 - Fix a bug that made servers send a "404 Not found" in response to
361 attempts to fetch their server descriptor. This caused Tor servers
362 to take many minutes to establish reachability for their DirPort,
363 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
364 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
365 users configure that and specify a bridge with an identity
366 fingerprint, now they will lookup the bridge descriptor at the
367 default bridge authority via a one-hop tunnel, but once circuits
368 are established they will switch to a three-hop tunnel for later
369 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
371 o Major bugfixes (hidden services):
372 - Hidden services were choosing introduction points uniquely by
373 hexdigest, but when constructing the hidden service descriptor
374 they merely wrote the (potentially ambiguous) nickname.
375 - Clients now use the v2 intro format for hidden service
376 connections: they specify their chosen rendezvous point by identity
377 digest rather than by (potentially ambiguous) nickname. Both
378 are bugfixes on 0.1.2.x, and they could speed up hidden service
379 connections dramatically. Thanks to Karsten Loesing.
381 o Minor features (security):
382 - As a client, do not believe any server that tells us that an
383 address maps to an internal address space.
384 - Make it possible to enable HashedControlPassword and
385 CookieAuthentication at the same time.
387 o Minor features (guard nodes):
388 - Tag every guard node in our state file with the version that
389 we believe added it, or with our own version if we add it. This way,
390 if a user temporarily runs an old version of Tor and then switches
391 back to a new one, she doesn't automatically lose her guards.
393 o Minor features (speed):
394 - When implementing AES counter mode, update only the portions of the
395 counter buffer that need to change, and don't keep separate
396 network-order and host-order counters when they are the same (i.e.,
397 on big-endian hosts.)
399 o Minor features (controller):
400 - Accept LF instead of CRLF on controller, since some software has a
401 hard time generating real Internet newlines.
402 - Add GETINFO values for the server status events
403 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
407 - Routers no longer include bandwidth-history lines in their
408 descriptors; this information is already available in extra-info
409 documents, and including it in router descriptors took up 60%
410 (!) of compressed router descriptor downloads. Completes
411 implementation of proposal 104.
412 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
413 and TorControl.py, as they use the old v0 controller protocol,
414 and are obsoleted by TorFlow anyway.
415 - Drop support for v1 rendezvous descriptors, since we never used
416 them anyway, and the code has probably rotted by now. Based on
417 patch from Karsten Loesing.
418 - On OSX, stop warning the user that kqueue support in libevent is
419 "experimental", since it seems to have worked fine for ages.
422 - When generating information telling us how to extend to a given
423 router, do not try to include the nickname if it is absent. Fixes
424 bug 467. Bugfix on 0.2.0.3-alpha.
425 - Fix a user-triggerable (but not remotely-triggerable) segfault
426 in expand_filename(). Bugfix on 0.1.2.x.
427 - Fix a memory leak when freeing incomplete requests from DNSPort.
428 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
429 - Don't try to access (or alter) the state file when running
430 --list-fingerprint or --verify-config or --hash-password. (Resolves
431 bug 499.) Bugfix on 0.1.2.x.
432 - Servers used to decline to publish their DirPort if their
433 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
434 were below a threshold. Now they only look at BandwidthRate and
435 RelayBandwidthRate. Bugfix on 0.1.2.x.
436 - Remove an optimization in the AES counter-mode code that assumed
437 that the counter never exceeded 2^68. When the counter can be set
438 arbitrarily as an IV (as it is by Karsten's new hidden services
439 code), this assumption no longer holds. Bugfix on 0.1.2.x.
440 - Resume listing "AUTHORITY" flag for authorities in network status.
441 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
443 o Code simplifications and refactoring:
444 - Revamp file-writing logic so we don't need to have the entire
445 contents of a file in memory at once before we write to disk. Tor,
447 - Turn "descriptor store" into a full-fledged type.
448 - Move all NT services code into a separate source file.
449 - Unify all code that computes medians, percentile elements, etc.
450 - Get rid of a needless malloc when parsing address policies.
453 Changes in version 0.1.2.17 - 2007-08-30
454 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
455 X bundles. Vidalia 0.0.14 makes authentication required for the
456 ControlPort in the default configuration, which addresses important
457 security risks. Everybody who uses Vidalia (or another controller)
460 In addition, this Tor update fixes major load balancing problems with
461 path selection, which should speed things up a lot once many people
464 o Major bugfixes (security):
465 - We removed support for the old (v0) control protocol. It has been
466 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
467 become more of a headache than it's worth.
469 o Major bugfixes (load balancing):
470 - When choosing nodes for non-guard positions, weight guards
471 proportionally less, since they already have enough load. Patch
473 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
474 will allow fast Tor servers to get more attention.
475 - When we're upgrading from an old Tor version, forget our current
476 guards and pick new ones according to the new weightings. These
477 three load balancing patches could raise effective network capacity
478 by a factor of four. Thanks to Mike Perry for measurements.
480 o Major bugfixes (stream expiration):
481 - Expire not-yet-successful application streams in all cases if
482 they've been around longer than SocksTimeout. Right now there are
483 some cases where the stream will live forever, demanding a new
484 circuit every 15 seconds. Fixes bug 454; reported by lodger.
486 o Minor features (controller):
487 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
488 is valid before any authentication has been received. It tells
489 a controller what kind of authentication is expected, and what
490 protocol is spoken. Implements proposal 119.
492 o Minor bugfixes (performance):
493 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
494 greatly speeding up loading cached-routers from disk on startup.
495 - Disable sentinel-based debugging for buffer code: we squashed all
496 the bugs that this was supposed to detect a long time ago, and now
497 its only effect is to change our buffer sizes from nice powers of
498 two (which platform mallocs tend to like) to values slightly over
499 powers of two (which make some platform mallocs sad).
501 o Minor bugfixes (misc):
502 - If exit bandwidth ever exceeds one third of total bandwidth, then
503 use the correct formula to weight exit nodes when choosing paths.
504 Based on patch from Mike Perry.
505 - Choose perfectly fairly among routers when choosing by bandwidth and
506 weighting by fraction of bandwidth provided by exits. Previously, we
507 would choose with only approximate fairness, and correct ourselves
508 if we ran off the end of the list.
509 - If we require CookieAuthentication but we fail to write the
510 cookie file, we would warn but not exit, and end up in a state
511 where no controller could authenticate. Now we exit.
512 - If we require CookieAuthentication, stop generating a new cookie
513 every time we change any piece of our config.
514 - Refuse to start with certain directory authority keys, and
515 encourage people using them to stop.
516 - Terminate multi-line control events properly. Original patch
518 - Fix a minor memory leak when we fail to find enough suitable
519 servers to choose a circuit.
520 - Stop leaking part of the descriptor when we run into a particularly
521 unparseable piece of it.
524 Changes in version 0.2.0.6-alpha - 2007-08-26
525 This sixth development snapshot features a new Vidalia version in the
526 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
527 the ControlPort in the default configuration, which addresses important
530 In addition, this snapshot fixes major load balancing problems
531 with path selection, which should speed things up a lot once many
532 people have upgraded. The directory authorities also use a new
533 mean-time-between-failure approach to tracking which servers are stable,
534 rather than just looking at the most recent uptime.
536 o New directory authorities:
537 - Set up Tonga as the default bridge directory authority.
540 - Directory authorities now track servers by weighted
541 mean-times-between-failures. When we have 4 or more days of data,
542 use measured MTBF rather than declared uptime to decide whether
543 to call a router Stable. Implements proposal 108.
545 o Major bugfixes (load balancing):
546 - When choosing nodes for non-guard positions, weight guards
547 proportionally less, since they already have enough load. Patch
549 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
550 will allow fast Tor servers to get more attention.
551 - When we're upgrading from an old Tor version, forget our current
552 guards and pick new ones according to the new weightings. These
553 three load balancing patches could raise effective network capacity
554 by a factor of four. Thanks to Mike Perry for measurements.
556 o Major bugfixes (descriptor parsing):
557 - Handle unexpected whitespace better in malformed descriptors. Bug
558 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
561 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
562 GETINFO for Torstat to use until it can switch to using extrainfos.
563 - Optionally (if built with -DEXPORTMALLINFO) export the output
564 of mallinfo via http, as tor/mallinfo.txt. Only accessible
568 - Do not intermix bridge routers with controller-added
569 routers. (Bugfix on 0.2.0.x)
570 - Do not fail with an assert when accept() returns an unexpected
571 address family. Addresses but does not wholly fix bug 483. (Bugfix
573 - Let directory authorities startup even when they can't generate
574 a descriptor immediately, e.g. because they don't know their
576 - Stop putting the authentication cookie in a file called "0"
577 in your working directory if you don't specify anything for the
578 new CookieAuthFile option. Reported by Matt Edman.
579 - Make it possible to read the PROTOCOLINFO response in a way that
580 conforms to our control-spec. Reported by Matt Edman.
581 - Fix a minor memory leak when we fail to find enough suitable
582 servers to choose a circuit. Bugfix on 0.1.2.x.
583 - Stop leaking part of the descriptor when we run into a particularly
584 unparseable piece of it. Bugfix on 0.1.2.x.
585 - Unmap the extrainfo cache file on exit.
588 Changes in version 0.2.0.5-alpha - 2007-08-19
589 This fifth development snapshot fixes compilation on Windows again;
590 fixes an obnoxious client-side bug that slowed things down and put
591 extra load on the network; gets us closer to using the v3 directory
592 voting scheme; makes it easier for Tor controllers to use cookie-based
593 authentication; and fixes a variety of other bugs.
596 - Version 1 directories are no longer generated in full. Instead,
597 authorities generate and serve "stub" v1 directories that list
598 no servers. This will stop Tor versions 0.1.0.x and earlier from
599 working, but (for security reasons) nobody should be running those
602 o Major bugfixes (compilation, 0.2.0.x):
603 - Try to fix Win32 compilation again: improve checking for IPv6 types.
604 - Try to fix MSVC compilation: build correctly on platforms that do
605 not define s6_addr16 or s6_addr32.
606 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
609 o Major bugfixes (stream expiration):
610 - Expire not-yet-successful application streams in all cases if
611 they've been around longer than SocksTimeout. Right now there are
612 some cases where the stream will live forever, demanding a new
613 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
616 o Minor features (directory servers):
617 - When somebody requests a list of statuses or servers, and we have
618 none of those, return a 404 rather than an empty 200.
620 o Minor features (directory voting):
621 - Store v3 consensus status consensuses on disk, and reload them
624 o Minor features (security):
625 - Warn about unsafe ControlPort configurations.
626 - Refuse to start with certain directory authority keys, and
627 encourage people using them to stop.
629 o Minor features (controller):
630 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
631 is valid before any authentication has been received. It tells
632 a controller what kind of authentication is expected, and what
633 protocol is spoken. Implements proposal 119.
634 - New config option CookieAuthFile to choose a new location for the
635 cookie authentication file, and config option
636 CookieAuthFileGroupReadable to make it group-readable.
638 o Minor features (unit testing):
639 - Add command-line arguments to unit-test executable so that we can
640 invoke any chosen test from the command line rather than having
641 to run the whole test suite at once; and so that we can turn on
642 logging for the unit tests.
644 o Minor bugfixes (on 0.1.2.x):
645 - If we require CookieAuthentication but we fail to write the
646 cookie file, we would warn but not exit, and end up in a state
647 where no controller could authenticate. Now we exit.
648 - If we require CookieAuthentication, stop generating a new cookie
649 every time we change any piece of our config.
650 - When loading bandwidth history, do not believe any information in
651 the future. Fixes bug 434.
652 - When loading entry guard information, do not believe any information
654 - When we have our clock set far in the future and generate an
655 onion key, then re-set our clock to be correct, we should not stop
656 the onion key from getting rotated.
657 - Clean up torrc sample config file.
658 - Do not automatically run configure from autogen.sh. This
659 non-standard behavior tended to annoy people who have built other
662 o Minor bugfixes (on 0.2.0.x):
663 - Fix a bug with AutomapHostsOnResolve that would always cause
664 the second request to fail. Bug reported by Kate. Bugfix on
666 - Fix a bug in ADDRMAP controller replies that would sometimes
667 try to print a NULL. Patch from tup.
668 - Read v3 directory authority keys from the right location.
669 - Numerous bugfixes to directory voting code.
672 Changes in version 0.1.2.16 - 2007-08-01
673 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
674 remote attacker in certain situations to rewrite the user's torrc
675 configuration file. This can completely compromise anonymity of users
676 in most configurations, including those running the Vidalia bundles,
679 o Major security fixes:
680 - Close immediately after missing authentication on control port;
681 do not allow multiple authentication attempts.
684 Changes in version 0.2.0.4-alpha - 2007-08-01
685 This fourth development snapshot fixes a critical security vulnerability
686 for most users, specifically those running Vidalia, TorK, etc. Everybody
687 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
689 o Major security fixes:
690 - Close immediately after missing authentication on control port;
691 do not allow multiple authentication attempts.
693 o Major bugfixes (compilation):
694 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
697 o Minor features (performance):
698 - Be even more aggressive about releasing RAM from small
699 empty buffers. Thanks to our free-list code, this shouldn't be too
700 performance-intensive.
701 - Disable sentinel-based debugging for buffer code: we squashed all
702 the bugs that this was supposed to detect a long time ago, and
703 now its only effect is to change our buffer sizes from nice
704 powers of two (which platform mallocs tend to like) to values
705 siightly over powers of two (which make some platform mallocs sad).
706 - Log malloc statistics from mallinfo() on platforms where it
710 Changes in version 0.2.0.3-alpha - 2007-07-29
711 This third development snapshot introduces new experimental
712 blocking-resistance features and a preliminary version of the v3
713 directory voting design, and includes many other smaller features
717 - The first pieces of our "bridge" design for blocking-resistance
718 are implemented. People can run bridge directory authorities;
719 people can run bridges; and people can configure their Tor clients
720 with a set of bridges to use as the first hop into the Tor network.
721 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
723 - Create listener connections before we setuid to the configured
724 User and Group. Now non-Windows users can choose port values
725 under 1024, start Tor as root, and have Tor bind those ports
726 before it changes to another UID. (Windows users could already
728 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
729 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
730 on "vserver" accounts. (Patch from coderman.)
731 - Be even more aggressive about separating local traffic from relayed
732 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
734 o Major features (experimental):
735 - First cut of code for "v3 dir voting": directory authorities will
736 vote on a common network status document rather than each publishing
737 their own opinion. This code needs more testing and more corner-case
738 handling before it's ready for use.
741 - Directory authorities now call routers Fast if their bandwidth is
742 at least 100KB/s, and consider their bandwidth adequate to be a
743 Guard if it is at least 250KB/s, no matter the medians. This fix
744 complements proposal 107. [Bugfix on 0.1.2.x]
745 - Directory authorities now never mark more than 3 servers per IP as
746 Valid and Running. (Implements proposal 109, by Kevin Bauer and
748 - Minor change to organizationName and commonName generation
749 procedures in TLS certificates during Tor handshakes, to invalidate
750 some earlier censorware approaches. This is not a long-term
751 solution, but applying it will give us a bit of time to look into
752 the epidemiology of countermeasures as they spread.
754 o Major bugfixes (directory):
755 - Rewrite directory tokenization code to never run off the end of
756 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
758 o Minor features (controller):
759 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
760 match requests to applications. (Patch from Robert Hogan.)
761 - Report address and port correctly on connections to DNSPort. (Patch
763 - Add a RESOLVE command to launch hostname lookups. (Original patch
765 - Add GETINFO status/enough-dir-info to let controllers tell whether
766 Tor has downloaded sufficient directory information. (Patch
768 - You can now use the ControlSocket option to tell Tor to listen for
769 controller connections on Unix domain sockets on systems that
770 support them. (Patch from Peter Palfrader.)
771 - STREAM NEW events are generated for DNSPort requests and for
772 tunneled directory connections. (Patch from Robert Hogan.)
773 - New "GETINFO address-mappings/*" command to get address mappings
774 with expiry information. "addr-mappings/*" is now deprecated.
777 o Minor features (misc):
778 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
780 - The tor-gencert tool for v3 directory authorities now creates all
781 files as readable to the file creator only, and write-protects
782 the authority identity key.
783 - When dumping memory usage, list bytes used in buffer memory
785 - When running with dmalloc, dump more stats on hup and on exit.
786 - Directory authorities now fail quickly and (relatively) harmlessly
787 if they generate a network status document that is somehow
790 o Traffic load balancing improvements:
791 - If exit bandwidth ever exceeds one third of total bandwidth, then
792 use the correct formula to weight exit nodes when choosing paths.
793 (Based on patch from Mike Perry.)
794 - Choose perfectly fairly among routers when choosing by bandwidth and
795 weighting by fraction of bandwidth provided by exits. Previously, we
796 would choose with only approximate fairness, and correct ourselves
797 if we ran off the end of the list. [Bugfix on 0.1.2.x]
799 o Performance improvements:
800 - Be more aggressive with freeing buffer RAM or putting it on the
802 - Use Critical Sections rather than Mutexes for synchronizing threads
803 on win32; Mutexes are heavier-weight, and designed for synchronizing
806 o Deprecated and removed features:
807 - RedirectExits is now deprecated.
808 - Stop allowing address masks that do not correspond to bit prefixes.
809 We have warned about these for a really long time; now it's time
810 to reject them. (Patch from croup.)
812 o Minor bugfixes (directory):
813 - Fix another crash bug related to extra-info caching. (Bug found by
814 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
815 - Directories no longer return a "304 not modified" when they don't
816 have the networkstatus the client asked for. Also fix a memory
817 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
818 - We had accidentally labelled 0.1.2.x directory servers as not
819 suitable for begin_dir requests, and had labelled no directory
820 servers as suitable for uploading extra-info documents. [Bugfix
823 o Minor bugfixes (dns):
824 - Fix a crash when DNSPort is set more than once. (Patch from Robert
825 Hogan.) [Bugfix on 0.2.0.2-alpha]
826 - Add DNSPort connections to the global connection list, so that we
827 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
829 - Fix a dangling reference that could lead to a crash when DNSPort is
830 changed or closed (Patch from Robert Hogan.) [Bugfix on
833 o Minor bugfixes (controller):
834 - Provide DNS expiry times in GMT, not in local time. For backward
835 compatibility, ADDRMAP events only provide GMT expiry in an extended
836 field. "GETINFO address-mappings" always does the right thing.
837 - Use CRLF line endings properly in NS events.
838 - Terminate multi-line control events properly. (Original patch
839 from tup.) [Bugfix on 0.1.2.x-alpha]
840 - Do not include spaces in SOURCE_ADDR fields in STREAM
841 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
844 Changes in version 0.1.2.15 - 2007-07-17
845 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
846 problems, fixes compilation on BSD, and fixes a variety of other
847 bugs. Everybody should upgrade.
849 o Major bugfixes (compilation):
850 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
852 o Major bugfixes (crashes):
853 - Try even harder not to dereference the first character after
854 an mmap(). Reported by lodger.
855 - Fix a crash bug in directory authorities when we re-number the
856 routerlist while inserting a new router.
857 - When the cached-routers file is an even multiple of the page size,
858 don't run off the end and crash. (Fixes bug 455; based on idea
860 - Fix eventdns.c behavior on Solaris: It is critical to include
861 orconfig.h _before_ sys/types.h, so that we can get the expected
862 definition of _FILE_OFFSET_BITS.
864 o Major bugfixes (security):
865 - Fix a possible buffer overrun when using BSD natd support. Bug
867 - When sending destroy cells from a circuit's origin, don't include
868 the reason for tearing down the circuit. The spec says we didn't,
869 and now we actually don't. Reported by lodger.
870 - Keep streamids from different exits on a circuit separate. This
871 bug may have allowed other routers on a given circuit to inject
872 cells into streams. Reported by lodger; fixes bug 446.
873 - If there's a never-before-connected-to guard node in our list,
874 never choose any guards past it. This way we don't expand our
875 guard list unless we need to.
877 o Minor bugfixes (guard nodes):
878 - Weight guard selection by bandwidth, so that low-bandwidth nodes
879 don't get overused as guards.
881 o Minor bugfixes (directory):
882 - Correctly count the number of authorities that recommend each
883 version. Previously, we were under-counting by 1.
884 - Fix a potential crash bug when we load many server descriptors at
885 once and some of them make others of them obsolete. Fixes bug 458.
887 o Minor bugfixes (hidden services):
888 - Stop tearing down the whole circuit when the user asks for a
889 connection to a port that the hidden service didn't configure.
892 o Minor bugfixes (misc):
893 - On Windows, we were preventing other processes from reading
894 cached-routers while Tor was running. Reported by janbar.
895 - Fix a possible (but very unlikely) bug in picking routers by
896 bandwidth. Add a log message to confirm that it is in fact
897 unlikely. Patch from lodger.
898 - Backport a couple of memory leak fixes.
899 - Backport miscellaneous cosmetic bugfixes.
902 Changes in version 0.2.0.2-alpha - 2007-06-02
903 o Major bugfixes on 0.2.0.1-alpha:
904 - Fix an assertion failure related to servers without extra-info digests.
905 Resolves bugs 441 and 442.
907 o Minor features (directory):
908 - Support "If-Modified-Since" when answering HTTP requests for
909 directories, running-routers documents, and network-status documents.
910 (There's no need to support it for router descriptors, since those
911 are downloaded by descriptor digest.)
913 o Minor build issues:
914 - Clear up some MIPSPro compiler warnings.
915 - When building from a tarball on a machine that happens to have SVK
916 installed, report the micro-revision as whatever version existed
917 in the tarball, not as "x".
920 Changes in version 0.2.0.1-alpha - 2007-06-01
921 This early development snapshot provides new features for people running
922 Tor as both a client and a server (check out the new RelayBandwidth
923 config options); lets Tor run as a DNS proxy; and generally moves us
924 forward on a lot of fronts.
926 o Major features, server usability:
927 - New config options RelayBandwidthRate and RelayBandwidthBurst:
928 a separate set of token buckets for relayed traffic. Right now
929 relayed traffic is defined as answers to directory requests, and
930 OR connections that don't have any local circuits on them.
932 o Major features, client usability:
933 - A client-side DNS proxy feature to replace the need for
934 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
935 for DNS requests on port 9999, use the Tor network to resolve them
936 anonymously, and send the reply back like a regular DNS server.
937 The code still only implements a subset of DNS.
938 - Make PreferTunneledDirConns and TunnelDirConns work even when
939 we have no cached directory info. This means Tor clients can now
940 do all of their connections protected by TLS.
942 o Major features, performance and efficiency:
943 - Directory authorities accept and serve "extra info" documents for
944 routers. These documents contain fields from router descriptors
945 that aren't usually needed, and that use a lot of excess
946 bandwidth. Once these fields are removed from router descriptors,
947 the bandwidth savings should be about 60%. [Partially implements
949 - Servers upload extra-info documents to any authority that accepts
950 them. Authorities (and caches that have been configured to download
951 extra-info documents) download them as needed. [Partially implements
953 - Change the way that Tor buffers data that it is waiting to write.
954 Instead of queueing data cells in an enormous ring buffer for each
955 client->OR or OR->OR connection, we now queue cells on a separate
956 queue for each circuit. This lets us use less slack memory, and
957 will eventually let us be smarter about prioritizing different kinds
959 - Use memory pools to allocate cells with better speed and memory
960 efficiency, especially on platforms where malloc() is inefficient.
961 - Stop reading on edge connections when their corresponding circuit
962 buffers are full; start again as the circuits empty out.
964 o Major features, other:
965 - Add an HSAuthorityRecordStats option that hidden service authorities
966 can use to track statistics of overall hidden service usage without
967 logging information that would be very useful to an attacker.
968 - Start work implementing multi-level keys for directory authorities:
969 Add a standalone tool to generate key certificates. (Proposal 103.)
972 - Directory authorities now call routers Stable if they have an
973 uptime of at least 30 days, even if that's not the median uptime
974 in the network. Implements proposal 107, suggested by Kevin Bauer
977 o Minor fixes (resource management):
978 - Count the number of open sockets separately from the number
979 of active connection_t objects. This will let us avoid underusing
980 our allocated connection limit.
981 - We no longer use socket pairs to link an edge connection to an
982 anonymous directory connection or a DirPort test connection.
983 Instead, we track the link internally and transfer the data
984 in-process. This saves two sockets per "linked" connection (at the
985 client and at the server), and avoids the nasty Windows socketpair()
987 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
988 for every single inactive connection_t. Free items from the
989 4k/16k-buffer free lists when they haven't been used for a while.
991 o Minor features (build):
992 - Make autoconf search for libevent, openssl, and zlib consistently.
993 - Update deprecated macros in configure.in.
994 - When warning about missing headers, tell the user to let us
995 know if the compile succeeds anyway, so we can downgrade the
997 - Include the current subversion revision as part of the version
998 string: either fetch it directly if we're in an SVN checkout, do
999 some magic to guess it if we're in an SVK checkout, or use
1000 the last-detected version if we're building from a .tar.gz.
1001 Use this version consistently in log messages.
1003 o Minor features (logging):
1004 - Always prepend "Bug: " to any log message about a bug.
1005 - Put a platform string (e.g. "Linux i686") in the startup log
1006 message, so when people paste just their logs, we know if it's
1007 OpenBSD or Windows or what.
1008 - When logging memory usage, break down memory used in buffers by
1011 o Minor features (directory system):
1012 - New config option V2AuthoritativeDirectory that all directory
1013 authorities should set. This will let future authorities choose
1014 not to serve V2 directory information.
1015 - Directory authorities allow multiple router descriptors and/or extra
1016 info documents to be uploaded in a single go. This will make
1017 implementing proposal 104 simpler.
1019 o Minor features (controller):
1020 - Add a new config option __DisablePredictedCircuits designed for
1021 use by the controller, when we don't want Tor to build any circuits
1023 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
1024 so we can exit from the middle of the circuit.
1025 - Implement "getinfo status/circuit-established".
1026 - Implement "getinfo status/version/..." so a controller can tell
1027 whether the current version is recommended, and whether any versions
1028 are good, and how many authorities agree. (Patch from shibz.)
1030 o Minor features (hidden services):
1031 - Allow multiple HiddenServicePort directives with the same virtual
1032 port; when they occur, the user is sent round-robin to one
1033 of the target ports chosen at random. Partially fixes bug 393 by
1034 adding limited ad-hoc round-robining.
1036 o Minor features (other):
1038 - Add a new AutomapHostsOnResolve option: when it is enabled, any
1039 resolve request for hosts matching a given pattern causes Tor to
1040 generate an internal virtual address mapping for that host. This
1041 allows DNSPort to work sensibly with hidden service users. By
1042 default, .exit and .onion addresses are remapped; the list of
1043 patterns can be reconfigured with AutomapHostsSuffixes.
1044 - Add an "-F" option to tor-resolve to force a resolve for a .onion
1045 address. Thanks to the AutomapHostsOnResolve option, this is no
1046 longer a completely silly thing to do.
1047 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
1048 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
1049 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
1050 minus 1 byte: the actual maximum declared bandwidth.
1053 - Removed support for the old binary "version 0" controller protocol.
1054 This has been deprecated since 0.1.1, and warnings have been issued
1055 since 0.1.2. When we encounter a v0 control message, we now send
1056 back an error and close the connection.
1057 - Remove the old "dns worker" server DNS code: it hasn't been default
1058 since 0.1.2.2-alpha, and all the servers seem to be using the new
1061 o Minor bugfixes (portability):
1062 - Even though Windows is equally happy with / and \ as path separators,
1063 try to use \ consistently on Windows and / consistently on Unix: it
1064 makes the log messages nicer.
1065 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
1066 - Read resolv.conf files correctly on platforms where read() returns
1067 partial results on small file reads.
1069 o Minor bugfixes (directory):
1070 - Correctly enforce that elements of directory objects do not appear
1071 more often than they are allowed to appear.
1072 - When we are reporting the DirServer line we just parsed, we were
1073 logging the second stanza of the key fingerprint, not the first.
1075 o Minor bugfixes (logging):
1076 - When we hit an EOF on a log (probably because we're shutting down),
1077 don't try to remove the log from the list: just mark it as
1078 unusable. (Bulletproofs against bug 222.)
1080 o Minor bugfixes (other):
1081 - In the exitlist script, only consider the most recently published
1082 server descriptor for each server. Also, when the user requests
1083 a list of servers that _reject_ connections to a given address,
1084 explicitly exclude the IPs that also have servers that accept
1085 connections to that address. (Resolves bug 405.)
1086 - Stop allowing hibernating servers to be "stable" or "fast".
1087 - On Windows, we were preventing other processes from reading
1088 cached-routers while Tor was running. (Reported by janbar)
1089 - Make the NodeFamilies config option work. (Reported by
1090 lodger -- it has never actually worked, even though we added it
1092 - Check return values from pthread_mutex functions.
1093 - Don't save non-general-purpose router descriptors to the disk cache,
1094 because we have no way of remembering what their purpose was when
1096 - Add even more asserts to hunt down bug 417.
1097 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
1098 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
1099 Add a log message to confirm that it is in fact unlikely.
1101 o Minor bugfixes (controller):
1102 - Make 'getinfo fingerprint' return a 551 error if we're not a
1103 server, so we match what the control spec claims we do. Reported
1105 - Fix a typo in an error message when extendcircuit fails that
1106 caused us to not follow the \r\n-based delimiter protocol. Reported
1109 o Code simplifications and refactoring:
1110 - Stop passing around circuit_t and crypt_path_t pointers that are
1111 implicit in other procedure arguments.
1112 - Drop the old code to choke directory connections when the
1113 corresponding OR connections got full: thanks to the cell queue
1114 feature, OR conns don't get full any more.
1115 - Make dns_resolve() handle attaching connections to circuits
1116 properly, so the caller doesn't have to.
1117 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
1118 - Keep the connection array as a dynamic smartlist_t, rather than as
1119 a fixed-sized array. This is important, as the number of connections
1120 is becoming increasingly decoupled from the number of sockets.
1123 Changes in version 0.1.2.14 - 2007-05-25
1124 Tor 0.1.2.14 changes the addresses of two directory authorities (this
1125 change especially affects those who serve or use hidden services),
1126 and fixes several other crash- and security-related bugs.
1128 o Directory authority changes:
1129 - Two directory authorities (moria1 and moria2) just moved to new
1130 IP addresses. This change will particularly affect those who serve
1131 or use hidden services.
1133 o Major bugfixes (crashes):
1134 - If a directory server runs out of space in the connection table
1135 as it's processing a begin_dir request, it will free the exit stream
1136 but leave it attached to the circuit, leading to unpredictable
1137 behavior. (Reported by seeess, fixes bug 425.)
1138 - Fix a bug in dirserv_remove_invalid() that would cause authorities
1139 to corrupt memory under some really unlikely scenarios.
1140 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
1141 - Avoid segfaults when reading from mmaped descriptor file. (Reported
1144 o Major bugfixes (security):
1145 - When choosing an entry guard for a circuit, avoid using guards
1146 that are in the same family as the chosen exit -- not just guards
1147 that are exactly the chosen exit. (Reported by lodger.)
1149 o Major bugfixes (resource management):
1150 - If a directory authority is down, skip it when deciding where to get
1151 networkstatus objects or descriptors. Otherwise we keep asking
1152 every 10 seconds forever. Fixes bug 384.
1153 - Count it as a failure if we fetch a valid network-status but we
1154 don't want to keep it. Otherwise we'll keep fetching it and keep
1155 not wanting to keep it. Fixes part of bug 422.
1156 - If all of our dirservers have given us bad or no networkstatuses
1157 lately, then stop hammering them once per minute even when we
1158 think they're failed. Fixes another part of bug 422.
1161 - Actually set the purpose correctly for descriptors inserted with
1163 - When we have k non-v2 authorities in our DirServer config,
1164 we ignored the last k authorities in the list when updating our
1166 - Correctly back-off from requesting router descriptors that we are
1167 having a hard time downloading.
1168 - Read resolv.conf files correctly on platforms where read() returns
1169 partial results on small file reads.
1170 - Don't rebuild the entire router store every time we get 32K of
1171 routers: rebuild it when the journal gets very large, or when
1172 the gaps in the store get very large.
1175 - When routers publish SVN revisions in their router descriptors,
1176 authorities now include those versions correctly in networkstatus
1178 - Warn when using a version of libevent before 1.3b to run a server on
1179 OSX or BSD: these versions interact badly with userspace threads.
1182 Changes in version 0.1.2.13 - 2007-04-24
1183 This release features some major anonymity fixes, such as safer path
1184 selection; better client performance; faster bootstrapping, better
1185 address detection, and better DNS support for servers; write limiting as
1186 well as read limiting to make servers easier to run; and a huge pile of
1187 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
1189 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
1190 of the Freenode IRC network, remembering his patience and vision for
1191 free speech on the Internet.
1194 - Fix a memory leak when we ask for "all" networkstatuses and we
1195 get one we don't recognize.
1196 - Add more asserts to hunt down bug 417.
1197 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
1200 Changes in version 0.1.2.12-rc - 2007-03-16
1202 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
1203 directory information requested inside Tor connections (i.e. via
1204 begin_dir cells). It only triggered when the same connection was
1205 serving other data at the same time. Reported by seeess.
1208 - When creating a circuit via the controller, send a 'launched'
1209 event when we're done, so we follow the spec better.
1212 Changes in version 0.1.2.11-rc - 2007-03-15
1213 o Minor bugfixes (controller), reported by daejees:
1214 - Correct the control spec to match how the code actually responds
1215 to 'getinfo addr-mappings/*'.
1216 - The control spec described a GUARDS event, but the code
1217 implemented a GUARD event. Standardize on GUARD, but let people
1221 Changes in version 0.1.2.10-rc - 2007-03-07
1222 o Major bugfixes (Windows):
1223 - Do not load the NT services library functions (which may not exist)
1224 just to detect if we're a service trying to shut down. Now we run
1225 on Win98 and friends again.
1227 o Minor bugfixes (other):
1228 - Clarify a couple of log messages.
1229 - Fix a misleading socks5 error number.
1232 Changes in version 0.1.2.9-rc - 2007-03-02
1233 o Major bugfixes (Windows):
1234 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
1235 of the usual GCC "%llu". This prevents a bug when saving 64-bit
1236 int configuration values: the high-order 32 bits would get
1237 truncated. In particular, we were being bitten by the default
1238 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
1239 and maybe also bug 397.)
1241 o Minor bugfixes (performance):
1242 - Use OpenSSL's AES implementation on platforms where it's faster.
1243 This could save us as much as 10% CPU usage.
1245 o Minor bugfixes (server):
1246 - Do not rotate onion key immediately after setting it for the first
1249 o Minor bugfixes (directory authorities):
1250 - Stop calling servers that have been hibernating for a long time
1251 "stable". Also, stop letting hibernating or obsolete servers affect
1252 uptime and bandwidth cutoffs.
1253 - Stop listing hibernating servers in the v1 directory.
1255 o Minor bugfixes (hidden services):
1256 - Upload hidden service descriptors slightly less often, to reduce
1257 load on authorities.
1259 o Minor bugfixes (other):
1260 - Fix an assert that could trigger if a controller quickly set then
1261 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
1262 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
1264 - Fix a potential race condition in the rpm installer. Found by
1266 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
1267 of 2 as indicating that the server is completely bad; it sometimes
1268 means that the server is just bad for the request in question. (may fix
1269 the last of bug 326.)
1270 - Disable encrypted directory connections when we don't have a server
1271 descriptor for the destination. We'll get this working again in
1275 Changes in version 0.1.2.8-beta - 2007-02-26
1276 o Major bugfixes (crashes):
1277 - Stop crashing when the controller asks us to resetconf more than
1278 one config option at once. (Vidalia 0.0.11 does this.)
1279 - Fix a crash that happened on Win98 when we're given command-line
1280 arguments: don't try to load NT service functions from advapi32.dll
1281 except when we need them. (Bug introduced in 0.1.2.7-alpha;
1283 - Fix a longstanding obscure crash bug that could occur when
1284 we run out of DNS worker processes. (Resolves bug 390.)
1286 o Major bugfixes (hidden services):
1287 - Correctly detect whether hidden service descriptor downloads are
1288 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
1290 o Major bugfixes (accounting):
1291 - When we start during an accounting interval before it's time to wake
1292 up, remember to wake up at the correct time. (May fix bug 342.)
1294 o Minor bugfixes (controller):
1295 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
1296 clear the corresponding on_circuit variable, and remember later
1297 that we don't need to send a redundant CLOSED event. (Resolves part
1299 - Report events where a resolve succeeded or where we got a socks
1300 protocol error correctly, rather than calling both of them
1302 - Change reported stream target addresses to IP consistently when
1303 we finally get the IP from an exit node.
1304 - Send log messages to the controller even if they happen to be very
1307 o Minor bugfixes (other):
1308 - Display correct results when reporting which versions are
1309 recommended, and how recommended they are. (Resolves bug 383.)
1310 - Improve our estimates for directory bandwidth to be less random:
1311 guess that an unrecognized directory will have the average bandwidth
1312 from all known directories, not that it will have the average
1313 bandwidth from those directories earlier than it on the list.
1314 - If we start a server with ClientOnly 1, then set ClientOnly to 0
1315 and hup, stop triggering an assert based on an empty onion_key.
1316 - On platforms with no working mmap() equivalent, don't warn the
1317 user when cached-routers doesn't exist.
1318 - Warn the user when mmap() [or its equivalent] fails for some reason
1319 other than file-not-found.
1320 - Don't warn the user when cached-routers.new doesn't exist: that's
1321 perfectly fine when starting up for the first time.
1322 - When EntryNodes are configured, rebuild the guard list to contain,
1323 in order: the EntryNodes that were guards before; the rest of the
1324 EntryNodes; the nodes that were guards before.
1325 - Mask out all signals in sub-threads; only the libevent signal
1326 handler should be processing them. This should prevent some crashes
1327 on some machines using pthreads. (Patch from coderman.)
1328 - Fix switched arguments on memset in the implementation of
1329 tor_munmap() for systems with no mmap() call.
1330 - When Tor receives a router descriptor that it asked for, but
1331 no longer wants (because it has received fresh networkstatuses
1332 in the meantime), do not warn the user. Cache the descriptor if
1333 we're a cache; drop it if we aren't.
1334 - Make earlier entry guards _really_ get retried when the network
1336 - On a malformed DNS reply, always give an error to the corresponding
1338 - Build with recent libevents on platforms that do not define the
1339 nonstandard types "u_int8_t" and friends.
1341 o Minor features (controller):
1342 - Warn the user when an application uses the obsolete binary v0
1343 control protocol. We're planning to remove support for it during
1344 the next development series, so it's good to give people some
1346 - Add STREAM_BW events to report per-entry-stream bandwidth
1347 use. (Patch from Robert Hogan.)
1348 - Rate-limit SIGNEWNYM signals in response to controllers that
1349 impolitely generate them for every single stream. (Patch from
1350 mwenge; closes bug 394.)
1351 - Make REMAP stream events have a SOURCE (cache or exit), and
1352 make them generated in every case where we get a successful
1353 connected or resolved cell.
1355 o Minor bugfixes (performance):
1356 - Call router_have_min_dir_info half as often. (This is showing up in
1357 some profiles, but not others.)
1358 - When using GCC, make log_debug never get called at all, and its
1359 arguments never get evaluated, when no debug logs are configured.
1360 (This is showing up in some profiles, but not others.)
1363 - Remove some never-implemented options. Mark PathlenCoinWeight as
1365 - Implement proposal 106: Stop requiring clients to have well-formed
1366 certificates; stop checking nicknames in certificates. (Clients
1367 have certificates so that they can look like Tor servers, but in
1368 the future we might want to allow them to look like regular TLS
1369 clients instead. Nicknames in certificates serve no purpose other
1370 than making our protocol easier to recognize on the wire.)
1371 - Revise messages on handshake failure again to be even more clear about
1372 which are incoming connections and which are outgoing.
1373 - Discard any v1 directory info that's over 1 month old (for
1374 directories) or over 1 week old (for running-routers lists).
1375 - Do not warn when individual nodes in the configuration's EntryNodes,
1376 ExitNodes, etc are down: warn only when all possible nodes
1377 are down. (Fixes bug 348.)
1378 - Always remove expired routers and networkstatus docs before checking
1379 whether we have enough information to build circuits. (Fixes
1381 - Put a lower-bound on MaxAdvertisedBandwidth.
1384 Changes in version 0.1.2.7-alpha - 2007-02-06
1385 o Major bugfixes (rate limiting):
1386 - Servers decline directory requests much more aggressively when
1387 they're low on bandwidth. Otherwise they end up queueing more and
1388 more directory responses, which can't be good for latency.
1389 - But never refuse directory requests from local addresses.
1390 - Fix a memory leak when sending a 503 response for a networkstatus
1392 - Be willing to read or write on local connections (e.g. controller
1393 connections) even when the global rate limiting buckets are empty.
1394 - If our system clock jumps back in time, don't publish a negative
1395 uptime in the descriptor. Also, don't let the global rate limiting
1396 buckets go absurdly negative.
1397 - Flush local controller connection buffers periodically as we're
1398 writing to them, so we avoid queueing 4+ megabytes of data before
1401 o Major bugfixes (NT services):
1402 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
1403 command-line flag so that admins can override the default by saying
1404 "tor --service install --user "SomeUser"". This will not affect
1405 existing installed services. Also, warn the user that the service
1406 will look for its configuration file in the service user's
1407 %appdata% directory. (We can't do the 'hardwire the user's appdata
1408 directory' trick any more, since we may not have read access to that
1411 o Major bugfixes (other):
1412 - Previously, we would cache up to 16 old networkstatus documents
1413 indefinitely, if they came from nontrusted authorities. Now we
1414 discard them if they are more than 10 days old.
1415 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
1417 - Detect and reject malformed DNS responses containing circular
1419 - If exits are rare enough that we're not marking exits as guards,
1420 ignore exit bandwidth when we're deciding the required bandwidth
1422 - When we're handling a directory connection tunneled over Tor,
1423 don't fill up internal memory buffers with all the data we want
1424 to tunnel; instead, only add it if the OR connection that will
1425 eventually receive it has some room for it. (This can lead to
1426 slowdowns in tunneled dir connections; a better solution will have
1429 o Minor bugfixes (dns):
1430 - Add some defensive programming to eventdns.c in an attempt to catch
1431 possible memory-stomping bugs.
1432 - Detect and reject DNS replies containing IPv4 or IPv6 records with
1433 an incorrect number of bytes. (Previously, we would ignore the
1435 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
1436 in the correct order, and doesn't crash.
1437 - Free memory held in recently-completed DNS lookup attempts on exit.
1438 This was not a memory leak, but may have been hiding memory leaks.
1439 - Handle TTL values correctly on reverse DNS lookups.
1440 - Treat failure to parse resolv.conf as an error.
1442 o Minor bugfixes (other):
1443 - Fix crash with "tor --list-fingerprint" (reported by seeess).
1444 - When computing clock skew from directory HTTP headers, consider what
1445 time it was when we finished asking for the directory, not what
1447 - Expire socks connections if they spend too long waiting for the
1448 handshake to finish. Previously we would let them sit around for
1449 days, if the connecting application didn't close them either.
1450 - And if the socks handshake hasn't started, don't send a
1451 "DNS resolve socks failed" handshake reply; just close it.
1452 - Stop using C functions that OpenBSD's linker doesn't like.
1453 - Don't launch requests for descriptors unless we have networkstatuses
1454 from at least half of the authorities. This delays the first
1455 download slightly under pathological circumstances, but can prevent
1456 us from downloading a bunch of descriptors we don't need.
1457 - Do not log IPs with TLS failures for incoming TLS
1458 connections. (Fixes bug 382.)
1459 - If the user asks to use invalid exit nodes, be willing to use
1461 - Stop using the reserved ac_cv namespace in our configure script.
1462 - Call stat() slightly less often; use fstat() when possible.
1463 - Refactor the way we handle pending circuits when an OR connection
1464 completes or fails, in an attempt to fix a rare crash bug.
1465 - Only rewrite a conn's address based on X-Forwarded-For: headers
1466 if it's a parseable public IP address; and stop adding extra quotes
1467 to the resulting address.
1470 - Weight directory requests by advertised bandwidth. Now we can
1471 let servers enable write limiting but still allow most clients to
1472 succeed at their directory requests. (We still ignore weights when
1473 choosing a directory authority; I hope this is a feature.)
1476 - Create a new file ReleaseNotes which was the old ChangeLog. The
1477 new ChangeLog file now includes the summaries for all development
1479 - Check for addresses with invalid characters at the exit as well
1480 as at the client, and warn less verbosely when they fail. You can
1481 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
1482 - Adapt a patch from goodell to let the contrib/exitlist script
1483 take arguments rather than require direct editing.
1484 - Inform the server operator when we decide not to advertise a
1485 DirPort due to AccountingMax enabled or a low BandwidthRate. It
1486 was confusing Zax, so now we're hopefully more helpful.
1487 - Bring us one step closer to being able to establish an encrypted
1488 directory tunnel without knowing a descriptor first. Still not
1489 ready yet. As part of the change, now assume we can use a
1490 create_fast cell if we don't know anything about a router.
1491 - Allow exit nodes to use nameservers running on ports other than 53.
1492 - Servers now cache reverse DNS replies.
1493 - Add an --ignore-missing-torrc command-line option so that we can
1494 get the "use sensible defaults if the configuration file doesn't
1495 exist" behavior even when specifying a torrc location on the command
1498 o Minor features (controller):
1499 - Track reasons for OR connection failure; make these reasons
1500 available via the controller interface. (Patch from Mike Perry.)
1501 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
1502 can learn when clients are sending malformed hostnames to Tor.
1503 - Clean up documentation for controller status events.
1504 - Add a REMAP status to stream events to note that a stream's
1505 address has changed because of a cached address or a MapAddress
1509 Changes in version 0.1.2.6-alpha - 2007-01-09
1511 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
1512 connection handles more than 4 gigs in either direction, we crash.
1513 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
1514 advertised exit node, somebody might try to exit from us when
1515 we're bootstrapping and before we've built our descriptor yet.
1516 Refuse the connection rather than crashing.
1519 - Warn if we (as a server) find that we've resolved an address that we
1520 weren't planning to resolve.
1521 - Warn that using select() on any libevent version before 1.1 will be
1522 unnecessarily slow (even for select()).
1523 - Flush ERR-level controller status events just like we currently
1524 flush ERR-level log events, so that a Tor shutdown doesn't prevent
1525 the controller from learning about current events.
1527 o Minor features (more controller status events):
1528 - Implement EXTERNAL_ADDRESS server status event so controllers can
1529 learn when our address changes.
1530 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
1531 can learn when directories reject our descriptor.
1532 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
1533 can learn when a client application is speaking a non-socks protocol
1535 - Implement DANGEROUS_SOCKS client status event so controllers
1536 can learn when a client application is leaking DNS addresses.
1537 - Implement BUG general status event so controllers can learn when
1538 Tor is unhappy about its internal invariants.
1539 - Implement CLOCK_SKEW general status event so controllers can learn
1540 when Tor thinks the system clock is set incorrectly.
1541 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
1542 server status events so controllers can learn when their descriptors
1543 are accepted by a directory.
1544 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
1545 server status events so controllers can learn about Tor's progress in
1546 deciding whether it's reachable from the outside.
1547 - Implement BAD_LIBEVENT general status event so controllers can learn
1548 when we have a version/method combination in libevent that needs to
1550 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
1551 and DNS_USELESS server status events so controllers can learn
1552 about changes to DNS server status.
1554 o Minor features (directory):
1555 - Authorities no longer recommend exits as guards if this would shift
1556 too much load to the exit nodes.
1559 Changes in version 0.1.2.5-alpha - 2007-01-06
1561 - Enable write limiting as well as read limiting. Now we sacrifice
1562 capacity if we're pushing out lots of directory traffic, rather
1563 than overrunning the user's intended bandwidth limits.
1564 - Include TLS overhead when counting bandwidth usage; previously, we
1565 would count only the bytes sent over TLS, but not the bytes used
1567 - Support running the Tor service with a torrc not in the same
1568 directory as tor.exe and default to using the torrc located in
1569 the %appdata%\Tor\ of the user who installed the service. Patch
1571 - Servers now check for the case when common DNS requests are going to
1572 wildcarded addresses (i.e. all getting the same answer), and change
1573 their exit policy to reject *:* if it's happening.
1574 - Implement BEGIN_DIR cells, so we can connect to the directory
1575 server via TLS to do encrypted directory requests rather than
1576 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
1577 config options if you like.
1579 o Minor features (config and docs):
1580 - Start using the state file to store bandwidth accounting data:
1581 the bw_accounting file is now obsolete. We'll keep generating it
1582 for a while for people who are still using 0.1.2.4-alpha.
1583 - Try to batch changes to the state file so that we do as few
1584 disk writes as possible while still storing important things in
1586 - The state file and the bw_accounting file get saved less often when
1587 the AvoidDiskWrites config option is set.
1588 - Make PIDFile work on Windows (untested).
1589 - Add internal descriptions for a bunch of configuration options:
1590 accessible via controller interface and in comments in saved
1592 - Reject *:563 (NNTPS) in the default exit policy. We already reject
1593 NNTP by default, so this seems like a sensible addition.
1594 - Clients now reject hostnames with invalid characters. This should
1595 avoid some inadvertent info leaks. Add an option
1596 AllowNonRFC953Hostnames to disable this behavior, in case somebody
1597 is running a private network with hosts called @, !, and #.
1598 - Add a maintainer script to tell us which options are missing
1599 documentation: "make check-docs".
1600 - Add a new address-spec.txt document to describe our special-case
1601 addresses: .exit, .onion, and .noconnnect.
1603 o Minor features (DNS):
1604 - Ongoing work on eventdns infrastructure: now it has dns server
1605 and ipv6 support. One day Tor will make use of it.
1606 - Add client-side caching for reverse DNS lookups.
1607 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
1608 - When we change nameservers or IP addresses, reset and re-launch
1609 our tests for DNS hijacking.
1611 o Minor features (directory):
1612 - Authorities now specify server versions in networkstatus. This adds
1613 about 2% to the size of compressed networkstatus docs, and allows
1614 clients to tell which servers support BEGIN_DIR and which don't.
1615 The implementation is forward-compatible with a proposed future
1616 protocol version scheme not tied to Tor versions.
1617 - DirServer configuration lines now have an orport= option so
1618 clients can open encrypted tunnels to the authorities without
1619 having downloaded their descriptors yet. Enabled for moria1,
1620 moria2, tor26, and lefkada now in the default configuration.
1621 - Directory servers are more willing to send a 503 "busy" if they
1622 are near their write limit, especially for v1 directory requests.
1623 Now they can use their limited bandwidth for actual Tor traffic.
1624 - Clients track responses with status 503 from dirservers. After a
1625 dirserver has given us a 503, we try not to use it until an hour has
1626 gone by, or until we have no dirservers that haven't given us a 503.
1627 - When we get a 503 from a directory, and we're not a server, we don't
1628 count the failure against the total number of failures allowed
1629 for the thing we're trying to download.
1630 - Report X-Your-Address-Is correctly from tunneled directory
1631 connections; don't report X-Your-Address-Is when it's an internal
1632 address; and never believe reported remote addresses when they're
1634 - Protect against an unlikely DoS attack on directory servers.
1635 - Add a BadDirectory flag to network status docs so that authorities
1636 can (eventually) tell clients about caches they believe to be
1639 o Minor features (controller):
1640 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
1641 - Reimplement GETINFO so that info/names stays in sync with the
1643 - Implement "GETINFO fingerprint".
1644 - Implement "SETEVENTS GUARD" so controllers can get updates on
1645 entry guard status as it changes.
1647 o Minor features (clean up obsolete pieces):
1648 - Remove some options that have been deprecated since at least
1649 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
1650 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
1652 - We no longer look for identity and onion keys in "identity.key" and
1653 "onion.key" -- these were replaced by secret_id_key and
1654 secret_onion_key in 0.0.8pre1.
1655 - We no longer require unrecognized directory entries to be
1658 o Major bugfixes (security):
1659 - Stop sending the HttpProxyAuthenticator string to directory
1660 servers when directory connections are tunnelled through Tor.
1661 - Clients no longer store bandwidth history in the state file.
1662 - Do not log introduction points for hidden services if SafeLogging
1664 - When generating bandwidth history, round down to the nearest
1665 1k. When storing accounting data, round up to the nearest 1k.
1666 - When we're running as a server, remember when we last rotated onion
1667 keys, so that we will rotate keys once they're a week old even if
1668 we never stay up for a week ourselves.
1670 o Major bugfixes (other):
1671 - Fix a longstanding bug in eventdns that prevented the count of
1672 timed-out resolves from ever being reset. This bug caused us to
1673 give up on a nameserver the third time it timed out, and try it
1674 10 seconds later... and to give up on it every time it timed out
1676 - Take out the '5 second' timeout from the connection retry
1677 schedule. Now the first connect attempt will wait a full 10
1678 seconds before switching to a new circuit. Perhaps this will help
1679 a lot. Based on observations from Mike Perry.
1680 - Fix a bug on the Windows implementation of tor_mmap_file() that
1681 would prevent the cached-routers file from ever loading. Reported
1685 - Fix an assert failure when a directory authority sets
1686 AuthDirRejectUnlisted and then receives a descriptor from an
1687 unlisted router. Reported by seeess.
1688 - Avoid a double-free when parsing malformed DirServer lines.
1689 - Fix a bug when a BSD-style PF socket is first used. Patch from
1691 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
1692 to resolve an address at a given exit node even when they ask for
1694 - Servers no longer ever list themselves in their "family" line,
1695 even if configured to do so. This makes it easier to configure
1696 family lists conveniently.
1697 - When running as a server, don't fall back to 127.0.0.1 when no
1698 nameservers are configured in /etc/resolv.conf; instead, make the
1699 user fix resolv.conf or specify nameservers explicitly. (Resolves
1701 - Stop accepting certain malformed ports in configured exit policies.
1702 - Don't re-write the fingerprint file every restart, unless it has
1704 - Stop warning when a single nameserver fails: only warn when _all_ of
1705 our nameservers have failed. Also, when we only have one nameserver,
1706 raise the threshold for deciding that the nameserver is dead.
1707 - Directory authorities now only decide that routers are reachable
1708 if their identity keys are as expected.
1709 - When the user uses bad syntax in the Log config line, stop
1710 suggesting other bad syntax as a replacement.
1711 - Correctly detect ipv6 DNS capability on OpenBSD.
1713 o Minor bugfixes (controller):
1714 - Report the circuit number correctly in STREAM CLOSED events. Bug
1715 reported by Mike Perry.
1716 - Do not report bizarre values for results of accounting GETINFOs
1717 when the last second's write or read exceeds the allotted bandwidth.
1718 - Report "unrecognized key" rather than an empty string when the
1719 controller tries to fetch a networkstatus that doesn't exist.
1722 Changes in version 0.1.1.26 - 2006-12-14
1723 o Security bugfixes:
1724 - Stop sending the HttpProxyAuthenticator string to directory
1725 servers when directory connections are tunnelled through Tor.
1726 - Clients no longer store bandwidth history in the state file.
1727 - Do not log introduction points for hidden services if SafeLogging
1731 - Fix an assert failure when a directory authority sets
1732 AuthDirRejectUnlisted and then receives a descriptor from an
1733 unlisted router (reported by seeess).
1736 Changes in version 0.1.2.4-alpha - 2006-12-03
1738 - Add support for using natd; this allows FreeBSDs earlier than
1739 5.1.2 to have ipfw send connections through Tor without using
1740 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
1743 - Make all connections to addresses of the form ".noconnect"
1744 immediately get closed. This lets application/controller combos
1745 successfully test whether they're talking to the same Tor by
1746 watching for STREAM events.
1747 - Make cross.sh cross-compilation script work even when autogen.sh
1748 hasn't been run. (Patch from Michael Mohr.)
1749 - Statistics dumped by -USR2 now include a breakdown of public key
1750 operations, for profiling.
1753 - Fix a major leak when directory authorities parse their
1754 approved-routers list, a minor memory leak when we fail to pick
1755 an exit node, and a few rare leaks on errors.
1756 - Handle TransPort connections even when the server sends data before
1757 the client sends data. Previously, the connection would just hang
1758 until the client sent data. (Patch from tup based on patch from
1760 - Avoid assert failure when our cached-routers file is empty on
1764 - Don't log spurious warnings when we see a circuit close reason we
1765 don't recognize; it's probably just from a newer version of Tor.
1766 - Have directory authorities allow larger amounts of drift in uptime
1767 without replacing the server descriptor: previously, a server that
1768 restarted every 30 minutes could have 48 "interesting" descriptors
1770 - Start linking to the Tor specification and Tor reference manual
1771 correctly in the Windows installer.
1772 - Add Vidalia to the OS X uninstaller script, so when we uninstall
1773 Tor/Privoxy we also uninstall Vidalia.
1774 - Resume building on Irix64, and fix a lot of warnings from its
1776 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
1777 when we're running as a client.
1780 Changes in version 0.1.1.25 - 2006-11-04
1782 - When a client asks us to resolve (rather than connect to)
1783 an address, and we have a cached answer, give them the cached
1784 answer. Previously, we would give them no answer at all.
1785 - We were building exactly the wrong circuits when we predict
1786 hidden service requirements, meaning Tor would have to build all
1787 its circuits on demand.
1788 - If none of our live entry guards have a high uptime, but we
1789 require a guard with a high uptime, try adding a new guard before
1790 we give up on the requirement. This patch should make long-lived
1791 connections more stable on average.
1792 - When testing reachability of our DirPort, don't launch new
1793 tests when there's already one in progress -- unreachable
1794 servers were stacking up dozens of testing streams.
1796 o Security bugfixes:
1797 - When the user sends a NEWNYM signal, clear the client-side DNS
1798 cache too. Otherwise we continue to act on previous information.
1801 - Avoid a memory corruption bug when creating a hash table for
1803 - Avoid possibility of controller-triggered crash when misusing
1804 certain commands from a v0 controller on platforms that do not
1805 handle printf("%s",NULL) gracefully.
1806 - Avoid infinite loop on unexpected controller input.
1807 - Don't log spurious warnings when we see a circuit close reason we
1808 don't recognize; it's probably just from a newer version of Tor.
1809 - Add Vidalia to the OS X uninstaller script, so when we uninstall
1810 Tor/Privoxy we also uninstall Vidalia.
1813 Changes in version 0.1.2.3-alpha - 2006-10-29
1815 - Prepare for servers to publish descriptors less often: never
1816 discard a descriptor simply for being too old until either it is
1817 recommended by no authorities, or until we get a better one for
1818 the same router. Make caches consider retaining old recommended
1819 routers for even longer.
1820 - If most authorities set a BadExit flag for a server, clients
1821 don't think of it as a general-purpose exit. Clients only consider
1822 authorities that advertise themselves as listing bad exits.
1823 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
1824 headers for content, so that we can work better in the presence of
1825 caching HTTP proxies.
1826 - Allow authorities to list nodes as bad exits by fingerprint or by
1829 o Minor features, controller:
1830 - Add a REASON field to CIRC events; for backward compatibility, this
1831 field is sent only to controllers that have enabled the extended
1832 event format. Also, add additional reason codes to explain why
1833 a given circuit has been destroyed or truncated. (Patches from
1835 - Add a REMOTE_REASON field to extended CIRC events to tell the
1836 controller about why a remote OR told us to close a circuit.
1837 - Stream events also now have REASON and REMOTE_REASON fields,
1838 working much like those for circuit events.
1839 - There's now a GETINFO ns/... field so that controllers can ask Tor
1840 about the current status of a router.
1841 - A new event type "NS" to inform a controller when our opinion of
1842 a router's status has changed.
1843 - Add a GETINFO events/names and GETINFO features/names so controllers
1844 can tell which events and features are supported.
1845 - A new CLEARDNSCACHE signal to allow controllers to clear the
1846 client-side DNS cache without expiring circuits.
1848 o Security bugfixes:
1849 - When the user sends a NEWNYM signal, clear the client-side DNS
1850 cache too. Otherwise we continue to act on previous information.
1853 - Avoid sending junk to controllers or segfaulting when a controller
1854 uses EVENT_NEW_DESC with verbose nicknames.
1855 - Stop triggering asserts if the controller tries to extend hidden
1856 service circuits (reported by mwenge).
1857 - Avoid infinite loop on unexpected controller input.
1858 - When the controller does a "GETINFO network-status", tell it
1859 about even those routers whose descriptors are very old, and use
1860 long nicknames where appropriate.
1861 - Change NT service functions to be loaded on demand. This lets us
1862 build with MinGW without breaking Tor for Windows 98 users.
1863 - Do DirPort reachability tests less often, since a single test
1864 chews through many circuits before giving up.
1865 - In the hidden service example in torrc.sample, stop recommending
1866 esoteric and discouraged hidden service options.
1867 - When stopping an NT service, wait up to 10 sec for it to actually
1868 stop. (Patch from Matt Edman; resolves bug 295.)
1869 - Fix handling of verbose nicknames with ORCONN controller events:
1870 make them show up exactly when requested, rather than exactly when
1872 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
1873 printing a duplicate "$" in the keys we send (reported by mwenge).
1874 - Correctly set maximum connection limit on Cygwin. (This time
1876 - Try to detect Windows correctly when cross-compiling.
1877 - Detect the size of the routers file correctly even if it is
1878 corrupted (on systems without mmap) or not page-aligned (on systems
1879 with mmap). This bug was harmless.
1880 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
1881 to open a stream fails; now we do in more cases. This should
1882 make clients able to find a good exit faster in some cases, since
1883 unhandleable requests will now get an error rather than timing out.
1884 - Resolve two memory leaks when rebuilding the on-disk router cache
1885 (reported by fookoowa).
1886 - Clean up minor code warnings suggested by the MIPSpro C compiler,
1887 and reported by some Centos users.
1888 - Controller signals now work on non-Unix platforms that don't define
1889 SIGUSR1 and SIGUSR2 the way we expect.
1890 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
1891 values before failing, and always enables eventdns.
1892 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
1893 Try to fix this in configure.in by checking for most functions
1894 before we check for libevent.
1897 Changes in version 0.1.2.2-alpha - 2006-10-07
1899 - Make our async eventdns library on-by-default for Tor servers,
1900 and plan to deprecate the separate dnsworker threads.
1901 - Add server-side support for "reverse" DNS lookups (using PTR
1902 records so clients can determine the canonical hostname for a given
1903 IPv4 address). Only supported by servers using eventdns; servers
1904 now announce in their descriptors whether they support eventdns.
1905 - Specify and implement client-side SOCKS5 interface for reverse DNS
1906 lookups (see doc/socks-extensions.txt).
1907 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
1908 connect to directory servers through Tor. Previously, clients needed
1909 to find Tor exits to make private connections to directory servers.
1910 - Avoid choosing Exit nodes for entry or middle hops when the
1911 total bandwidth available from non-Exit nodes is much higher than
1912 the total bandwidth available from Exit nodes.
1913 - Workaround for name servers (like Earthlink's) that hijack failing
1914 DNS requests and replace the no-such-server answer with a "helpful"
1915 redirect to an advertising-driven search portal. Also work around
1916 DNS hijackers who "helpfully" decline to hijack known-invalid
1917 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
1918 lets you turn it off.
1919 - Send out a burst of long-range padding cells once we've established
1920 that we're reachable. Spread them over 4 circuits, so hopefully
1921 a few will be fast. This exercises our bandwidth and bootstraps
1922 us into the directory more quickly.
1924 o New/improved config options:
1925 - Add new config option "ResolvConf" to let the server operator
1926 choose an alternate resolve.conf file when using eventdns.
1927 - Add an "EnforceDistinctSubnets" option to control our "exclude
1928 servers on the same /16" behavior. It's still on by default; this
1929 is mostly for people who want to operate private test networks with
1930 all the machines on the same subnet.
1931 - If one of our entry guards is on the ExcludeNodes list, or the
1932 directory authorities don't think it's a good guard, treat it as
1933 if it were unlisted: stop using it as a guard, and throw it off
1934 the guards list if it stays that way for a long time.
1935 - Allow directory authorities to be marked separately as authorities
1936 for the v1 directory protocol, the v2 directory protocol, and
1937 as hidden service directories, to make it easier to retire old
1938 authorities. V1 authorities should set "HSAuthoritativeDir 1"
1939 to continue being hidden service authorities too.
1940 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
1942 o Minor features, controller:
1943 - Fix CIRC controller events so that controllers can learn the
1944 identity digests of non-Named servers used in circuit paths.
1945 - Let controllers ask for more useful identifiers for servers. Instead
1946 of learning identity digests for un-Named servers and nicknames
1947 for Named servers, the new identifiers include digest, nickname,
1948 and indication of Named status. Off by default; see control-spec.txt
1949 for more information.
1950 - Add a "getinfo address" controller command so it can display Tor's
1951 best guess to the user.
1952 - New controller event to alert the controller when our server
1953 descriptor has changed.
1954 - Give more meaningful errors on controller authentication failure.
1956 o Minor features, other:
1957 - When asked to resolve a hostname, don't use non-exit servers unless
1958 requested to do so. This allows servers with broken DNS to be
1959 useful to the network.
1960 - Divide eventdns log messages into warn and info messages.
1961 - Reserve the nickname "Unnamed" for routers that can't pick
1962 a hostname: any router can call itself Unnamed; directory
1963 authorities will never allocate Unnamed to any particular router;
1964 clients won't believe that any router is the canonical Unnamed.
1965 - Only include function names in log messages for info/debug messages.
1966 For notice/warn/err, the content of the message should be clear on
1967 its own, and printing the function name only confuses users.
1968 - Avoid some false positives during reachability testing: don't try
1969 to test via a server that's on the same /24 as us.
1970 - If we fail to build a circuit to an intended enclave, and it's
1971 not mandatory that we use that enclave, stop wanting it.
1972 - When eventdns is enabled, allow multithreaded builds on NetBSD and
1973 OpenBSD. (We had previously disabled threads on these platforms
1974 because they didn't have working thread-safe resolver functions.)
1976 o Major bugfixes, anonymity/security:
1977 - If a client asked for a server by name, and there's a named server
1978 in our network-status but we don't have its descriptor yet, we
1979 could return an unnamed server instead.
1980 - Fix NetBSD bug that could allow someone to force uninitialized RAM
1981 to be sent to a server's DNS resolver. This only affects NetBSD
1982 and other platforms that do not bounds-check tolower().
1983 - Reject (most) attempts to use Tor circuits with length one. (If
1984 many people start using Tor as a one-hop proxy, exit nodes become
1985 a more attractive target for compromise.)
1986 - Just because your DirPort is open doesn't mean people should be
1987 able to remotely teach you about hidden service descriptors. Now
1988 only accept rendezvous posts if you've got HSAuthoritativeDir set.
1990 o Major bugfixes, other:
1991 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
1992 - When a client asks the server to resolve (not connect to)
1993 an address, and it has a cached answer, give them the cached answer.
1994 Previously, the server would give them no answer at all.
1995 - Allow really slow clients to not hang up five minutes into their
1996 directory downloads (suggested by Adam J. Richter).
1997 - We were building exactly the wrong circuits when we anticipated
1998 hidden service requirements, meaning Tor would have to build all
1999 its circuits on demand.
2000 - Avoid crashing when we mmap a router cache file of size 0.
2001 - When testing reachability of our DirPort, don't launch new
2002 tests when there's already one in progress -- unreachable
2003 servers were stacking up dozens of testing streams.
2005 o Minor bugfixes, correctness:
2006 - If we're a directory mirror and we ask for "all" network status
2007 documents, we would discard status documents from authorities
2009 - Avoid a memory corruption bug when creating a hash table for
2011 - Avoid controller-triggered crash when misusing certain commands
2012 from a v0 controller on platforms that do not handle
2013 printf("%s",NULL) gracefully.
2014 - Don't crash when a controller sends a third argument to an
2015 "extendcircuit" request.
2016 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
2017 response; fix error code when "getinfo dir/status/" fails.
2018 - Avoid crash when telling controller stream-status and a stream
2020 - Patch from Adam Langley to fix assert() in eventdns.c.
2021 - Fix a debug log message in eventdns to say "X resolved to Y"
2022 instead of "X resolved to X".
2023 - Make eventdns give strings for DNS errors, not just error numbers.
2024 - Track unreachable entry guards correctly: don't conflate
2025 'unreachable by us right now' with 'listed as down by the directory
2026 authorities'. With the old code, if a guard was unreachable by
2027 us but listed as running, it would clog our guard list forever.
2028 - Behave correctly in case we ever have a network with more than
2029 2GB/s total advertised capacity.
2030 - Make TrackExitHosts case-insensitive, and fix the behavior of
2031 ".suffix" TrackExitHosts items to avoid matching in the middle of
2033 - Finally fix the openssl warnings from newer gccs that believe that
2034 ignoring a return value is okay, but casting a return value and
2035 then ignoring it is a sign of madness.
2036 - Prevent the contrib/exitlist script from printing the same
2037 result more than once.
2038 - Patch from Steve Hildrey: Generate network status correctly on
2039 non-versioning dirservers.
2040 - Don't listen to the X-Your-Address-Is hint if you did the lookup
2041 via Tor; otherwise you'll think you're the exit node's IP address.
2043 o Minor bugfixes, performance:
2044 - Two small performance improvements on parsing descriptors.
2045 - Major performance improvement on inserting descriptors: change
2046 algorithm from O(n^2) to O(n).
2047 - Make the common memory allocation path faster on machines where
2048 malloc(0) returns a pointer.
2049 - Start remembering X-Your-Address-Is directory hints even if you're
2050 a client, so you can become a server more smoothly.
2051 - Avoid duplicate entries on MyFamily line in server descriptor.
2053 o Packaging, features:
2054 - Remove architecture from OS X builds. The official builds are
2055 now universal binaries.
2056 - The Debian package now uses --verify-config when (re)starting,
2057 to distinguish configuration errors from other errors.
2058 - Update RPMs to require libevent 1.1b.
2060 o Packaging, bugfixes:
2061 - Patches so Tor builds with MinGW on Windows.
2062 - Patches so Tor might run on Cygwin again.
2063 - Resume building on non-gcc compilers and ancient gcc. Resume
2064 building with the -O0 compile flag. Resume building cleanly on
2066 - Run correctly on OS X platforms with case-sensitive filesystems.
2067 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
2068 - Add autoconf checks so Tor can build on Solaris x86 again.
2071 - Documented (and renamed) ServerDNSSearchDomains and
2072 ServerDNSResolvConfFile options.
2073 - Be clearer that the *ListenAddress directives can be repeated
2077 Changes in version 0.1.1.24 - 2006-09-29
2079 - Allow really slow clients to not hang up five minutes into their
2080 directory downloads (suggested by Adam J. Richter).
2081 - Fix major performance regression from 0.1.0.x: instead of checking
2082 whether we have enough directory information every time we want to
2083 do something, only check when the directory information has changed.
2084 This should improve client CPU usage by 25-50%.
2085 - Don't crash if, after a server has been running for a while,
2086 it can't resolve its hostname.
2089 - Allow Tor to start when RunAsDaemon is set but no logs are set.
2090 - Don't crash when the controller receives a third argument to an
2091 "extendcircuit" request.
2092 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
2093 response; fix error code when "getinfo dir/status/" fails.
2094 - Fix configure.in to not produce broken configure files with
2095 more recent versions of autoconf. Thanks to Clint for his auto*
2097 - Fix security bug on NetBSD that could allow someone to force
2098 uninitialized RAM to be sent to a server's DNS resolver. This
2099 only affects NetBSD and other platforms that do not bounds-check
2101 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
2102 methods: these are known to be buggy.
2103 - If we're a directory mirror and we ask for "all" network status
2104 documents, we would discard status documents from authorities
2108 Changes in version 0.1.2.1-alpha - 2006-08-27
2110 - Add "eventdns" async dns library from Adam Langley, tweaked to
2111 build on OSX and Windows. Only enabled if you pass the
2112 --enable-eventdns argument to configure.
2113 - Allow servers with no hostname or IP address to learn their
2114 IP address by asking the directory authorities. This code only
2115 kicks in when you would normally have exited with a "no address"
2116 error. Nothing's authenticated, so use with care.
2117 - Rather than waiting a fixed amount of time between retrying
2118 application connections, we wait only 5 seconds for the first,
2119 10 seconds for the second, and 15 seconds for each retry after
2120 that. Hopefully this will improve the expected user experience.
2121 - Patch from Tup to add support for transparent AP connections:
2122 this basically bundles the functionality of trans-proxy-tor
2123 into the Tor mainline. Now hosts with compliant pf/netfilter
2124 implementations can redirect TCP connections straight to Tor
2125 without diverting through SOCKS. Needs docs.
2126 - Busy directory servers save lots of memory by spooling server
2127 descriptors, v1 directories, and v2 networkstatus docs to buffers
2128 as needed rather than en masse. Also mmap the cached-routers
2129 files, so we don't need to keep the whole thing in memory too.
2130 - Automatically avoid picking more than one node from the same
2131 /16 network when constructing a circuit.
2132 - Revise and clean up the torrc.sample that we ship with; add
2133 a section for BandwidthRate and BandwidthBurst.
2136 - Split circuit_t into origin_circuit_t and or_circuit_t, and
2137 split connection_t into edge, or, dir, control, and base structs.
2138 These will save quite a bit of memory on busy servers, and they'll
2139 also help us track down bugs in the code and bugs in the spec.
2140 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
2141 or later. Log when we are doing this, so we can diagnose it when
2142 it fails. (Also, recommend libevent 1.1b for kqueue and
2143 win32 methods; deprecate libevent 1.0b harder; make libevent
2144 recommendation system saner.)
2145 - Start being able to build universal binaries on OS X (thanks
2147 - Export the default exit policy via the control port, so controllers
2148 don't need to guess what it is / will be later.
2149 - Add a man page entry for ProtocolWarnings.
2150 - Add TestVia config option to the man page.
2151 - Remove even more protocol-related warnings from Tor server logs,
2152 such as bad TLS handshakes and malformed begin cells.
2153 - Stop fetching descriptors if you're not a dir mirror and you
2154 haven't tried to establish any circuits lately. [This currently
2155 causes some dangerous behavior, because when you start up again
2156 you'll use your ancient server descriptors.]
2157 - New DirPort behavior: if you have your dirport set, you download
2158 descriptors aggressively like a directory mirror, whether or not
2160 - Get rid of the router_retry_connections notion. Now routers
2161 no longer try to rebuild long-term connections to directory
2162 authorities, and directory authorities no longer try to rebuild
2163 long-term connections to all servers. We still don't hang up
2164 connections in these two cases though -- we need to look at it
2165 more carefully to avoid flapping, and we likely need to wait til
2166 0.1.1.x is obsolete.
2167 - Drop compatibility with obsolete Tors that permit create cells
2168 to have the wrong circ_id_type.
2169 - Re-enable per-connection rate limiting. Get rid of the "OP
2170 bandwidth" concept. Lay groundwork for "bandwidth classes" --
2171 separate global buckets that apply depending on what sort of conn
2173 - Start publishing one minute or so after we find our ORPort
2174 to be reachable. This will help reduce the number of descriptors
2175 we have for ourselves floating around, since it's quite likely
2176 other things (e.g. DirPort) will change during that minute too.
2177 - Fork the v1 directory protocol into its own spec document,
2178 and mark dir-spec.txt as the currently correct (v2) spec.
2181 - When we find our DirPort to be reachable, publish a new descriptor
2182 so we'll tell the world (reported by pnx).
2183 - Publish a new descriptor after we hup/reload. This is important
2184 if our config has changed such that we'll want to start advertising
2185 our DirPort now, etc.
2186 - Allow Tor to start when RunAsDaemon is set but no logs are set.
2187 - When we have a state file we cannot parse, tell the user and
2188 move it aside. Now we avoid situations where the user starts
2189 Tor in 1904, Tor writes a state file with that timestamp in it,
2190 the user fixes her clock, and Tor refuses to start.
2191 - Fix configure.in to not produce broken configure files with
2192 more recent versions of autoconf. Thanks to Clint for his auto*
2194 - "tor --verify-config" now exits with -1(255) or 0 depending on
2195 whether the config options are bad or good.
2196 - Resolve bug 321 when using dnsworkers: append a period to every
2197 address we resolve at the exit node, so that we do not accidentally
2198 pick up local addresses, and so that failing searches are retried
2199 in the resolver search domains. (This is already solved for
2200 eventdns.) (This breaks Blossom servers for now.)
2201 - If we are using an exit enclave and we can't connect, e.g. because
2202 its webserver is misconfigured to not listen on localhost, then
2203 back off and try connecting from somewhere else before we fail.
2206 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
2207 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
2208 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
2209 when the IP address is mapped through MapAddress to a hostname.
2210 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
2211 useless IPv6 DNS resolves.
2212 - Patch suggested by Karsten Loesing: respond to SIGNAL command
2213 before we execute the signal, in case the signal shuts us down.
2214 - Clean up AllowInvalidNodes man page entry.
2215 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
2216 - Add more asserts to track down an assert error on a windows Tor
2217 server with connection_add being called with socket == -1.
2218 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
2219 - Fix misleading log messages: an entry guard that is "unlisted",
2220 as well as not known to be "down" (because we've never heard
2221 of it), is not therefore "up".
2222 - Remove code to special-case "-cvs" ending, since it has not
2223 actually mattered since 0.0.9.
2224 - Make our socks5 handling more robust to broken socks clients:
2225 throw out everything waiting on the buffer in between socks
2226 handshake phases, since they can't possibly (so the theory
2227 goes) have predicted what we plan to respond to them.
2230 Changes in version 0.1.1.23 - 2006-07-30
2232 - Fast Tor servers, especially exit nodes, were triggering asserts
2233 due to a bug in handling the list of pending DNS resolves. Some
2234 bugs still remain here; we're hunting them.
2235 - Entry guards could crash clients by sending unexpected input.
2236 - More fixes on reachability testing: if you find yourself reachable,
2237 then don't ever make any client requests (so you stop predicting
2238 circuits), then hup or have your clock jump, then later your IP
2239 changes, you won't think circuits are working, so you won't try to
2240 test reachability, so you won't publish.
2243 - Avoid a crash if the controller does a resetconf firewallports
2244 and then a setconf fascistfirewall=1.
2245 - Avoid an integer underflow when the dir authority decides whether
2246 a router is stable: we might wrongly label it stable, and compute
2247 a slightly wrong median stability, when a descriptor is published
2249 - Fix a place where we might trigger an assert if we can't build our
2250 own server descriptor yet.
2253 Changes in version 0.1.1.22 - 2006-07-05
2255 - Fix a big bug that was causing servers to not find themselves
2256 reachable if they changed IP addresses. Since only 0.1.1.22+
2257 servers can do reachability testing correctly, now we automatically
2258 make sure to test via one of these.
2259 - Fix to allow clients and mirrors to learn directory info from
2260 descriptor downloads that get cut off partway through.
2261 - Directory authorities had a bug in deciding if a newly published
2262 descriptor was novel enough to make everybody want a copy -- a few
2263 servers seem to be publishing new descriptors many times a minute.
2265 - Fix a rare bug that was causing some servers to complain about
2266 "closing wedged cpuworkers" and skip some circuit create requests.
2267 - Make the Exit flag in directory status documents actually work.
2270 Changes in version 0.1.1.21 - 2006-06-10
2271 o Crash and assert fixes from 0.1.1.20:
2272 - Fix a rare crash on Tor servers that have enabled hibernation.
2273 - Fix a seg fault on startup for Tor networks that use only one
2274 directory authority.
2275 - Fix an assert from a race condition that occurs on Tor servers
2276 while exiting, where various threads are trying to log that they're
2277 exiting, and delete the logs, at the same time.
2278 - Make our unit tests pass again on certain obscure platforms.
2281 - Add support for building SUSE RPM packages.
2282 - Speed up initial bootstrapping for clients: if we are making our
2283 first ever connection to any entry guard, then don't mark it down
2285 - When only one Tor server in the network is labelled as a guard,
2286 and we've already picked him, we would cycle endlessly picking him
2287 again, being unhappy about it, etc. Now we specifically exclude
2288 current guards when picking a new guard.
2289 - Servers send create cells more reliably after the TLS connection
2290 is established: we were sometimes forgetting to send half of them
2291 when we had more than one pending.
2292 - If we get a create cell that asks us to extend somewhere, but the
2293 Tor server there doesn't match the expected digest, we now send
2294 a destroy cell back, rather than silently doing nothing.
2295 - Make options->RedirectExit work again.
2296 - Make cookie authentication for the controller work again.
2297 - Stop being picky about unusual characters in the arguments to
2298 mapaddress. It's none of our business.
2299 - Add a new config option "TestVia" that lets you specify preferred
2300 middle hops to use for test circuits. Perhaps this will let me
2301 debug the reachability problems better.
2303 o Log / documentation fixes:
2304 - If we're a server and some peer has a broken TLS certificate, don't
2305 log about it unless ProtocolWarnings is set, i.e., we want to hear
2306 about protocol violations by others.
2307 - Fix spelling of VirtualAddrNetwork in man page.
2308 - Add a better explanation at the top of the autogenerated torrc file
2309 about what happened to our old torrc.
2312 Changes in version 0.1.1.20 - 2006-05-23
2314 - Downgrade a log severity where servers complain that they're
2316 - Avoid a compile warning on FreeBSD.
2317 - Remove string size limit on NEWDESC messages; solve bug 291.
2318 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
2319 more thoroughly when we're running on windows.
2322 Changes in version 0.1.1.19-rc - 2006-05-03
2324 - Regenerate our local descriptor if it's dirty and we try to use
2325 it locally (e.g. if it changes during reachability detection).
2326 - If we setconf our ORPort to 0, we continued to listen on the
2327 old ORPort and receive connections.
2328 - Avoid a second warning about machine/limits.h on Debian
2330 - Be willing to add our own routerinfo into the routerlist.
2331 Now authorities will include themselves in their directories
2332 and network-statuses.
2333 - Stop trying to upload rendezvous descriptors to every
2334 directory authority: only try the v1 authorities.
2335 - Servers no longer complain when they think they're not
2336 registered with the directory authorities. There were too many
2338 - Backport dist-rpm changes so rpms can be built without errors.
2341 - Implement an option, VirtualAddrMask, to set which addresses
2342 get handed out in response to mapaddress requests. This works
2343 around a bug in tsocks where 127.0.0.0/8 is never socksified.
2346 Changes in version 0.1.1.18-rc - 2006-04-10
2348 - Work harder to download live network-statuses from all the
2349 directory authorities we know about. Improve the threshold
2350 decision logic so we're more robust to edge cases.
2351 - When fetching rendezvous descriptors, we were willing to ask
2352 v2 authorities too, which would always return 404.
2355 - Stop listing down or invalid nodes in the v1 directory. This will
2356 reduce its bulk by about 1/3, and reduce load on directory
2358 - When deciding whether a router is Fast or Guard-worthy, consider
2359 his advertised BandwidthRate and not just the BandwidthCapacity.
2360 - No longer ship INSTALL and README files -- they are useless now.
2361 - Force rpmbuild to behave and honor target_cpu.
2362 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
2363 - Start to include translated versions of the tor-doc-*.html
2364 files, along with the screenshots. Still needs more work.
2365 - Start sending back 512 and 451 errors if mapaddress fails,
2366 rather than not sending anything back at all.
2367 - When we fail to bind or listen on an incoming or outgoing
2368 socket, we should close it before failing. otherwise we just
2369 leak it. (thanks to weasel for finding.)
2370 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
2371 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
2372 - Make NoPublish (even though deprecated) work again.
2373 - Fix a minor security flaw where a versioning auth dirserver
2374 could list a recommended version many times in a row to make
2375 clients more convinced that it's recommended.
2376 - Fix crash bug if there are two unregistered servers running
2377 with the same nickname, one of them is down, and you ask for
2378 them by nickname in your EntryNodes or ExitNodes. Also, try
2379 to pick the one that's running rather than an arbitrary one.
2380 - Fix an infinite loop we could hit if we go offline for too long.
2381 - Complain when we hit WSAENOBUFS on recv() or write() too.
2382 Perhaps this will help us hunt the bug.
2383 - If you're not a versioning dirserver, don't put the string
2384 "client-versions \nserver-versions \n" in your network-status.
2385 - Lower the minimum required number of file descriptors to 1000,
2386 so we can have some overhead for Valgrind on Linux, where the
2387 default ulimit -n is 1024.
2390 - Add tor.dizum.com as the fifth authoritative directory server.
2391 - Add a new config option FetchUselessDescriptors, off by default,
2392 for when you plan to run "exitlist" on your client and you want
2393 to know about even the non-running descriptors.
2396 Changes in version 0.1.1.17-rc - 2006-03-28
2398 - Clients and servers since 0.1.1.10-alpha have been expiring
2399 connections whenever they are idle for 5 minutes and they *do*
2400 have circuits on them. Oops. With this new version, clients will
2401 discard their previous entry guard choices and avoid choosing
2402 entry guards running these flawed versions.
2403 - Fix memory leak when uncompressing concatenated zlib streams. This
2404 was causing substantial leaks over time on Tor servers.
2405 - The v1 directory was including servers as much as 48 hours old,
2406 because that's how the new routerlist->routers works. Now only
2407 include them if they're 20 hours old or less.
2410 - Resume building on irix64, netbsd 2.0, etc.
2411 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
2413 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
2414 and it is confusing some users.
2415 - Mirrors stop caching the v1 directory so often.
2416 - Make the max number of old descriptors that a cache will hold
2417 rise with the number of directory authorities, so we can scale.
2418 - Change our win32 uname() hack to be more forgiving about what
2419 win32 versions it thinks it's found.
2422 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
2424 - When the controller's *setconf commands fail, collect an error
2425 message in a string and hand it back to the controller.
2426 - Make the v2 dir's "Fast" flag based on relative capacity, just
2427 like "Stable" is based on median uptime. Name everything in the
2428 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
2429 - Log server fingerprint on startup, so new server operators don't
2430 have to go hunting around their filesystem for it.
2431 - Return a robots.txt on our dirport to discourage google indexing.
2432 - Let the controller ask for GETINFO dir/status/foo so it can ask
2433 directly rather than connecting to the dir port. Only works when
2434 dirport is set for now.
2436 o New config options rather than constants in the code:
2437 - SocksTimeout: How long do we let a socks connection wait
2438 unattached before we fail it?
2439 - CircuitBuildTimeout: Cull non-open circuits that were born
2440 at least this many seconds ago.
2441 - CircuitIdleTimeout: Cull open clean circuits that were born
2442 at least this many seconds ago.
2445 Changes in version 0.1.1.16-rc - 2006-03-18
2446 o Bugfixes on 0.1.1.15-rc:
2447 - Fix assert when the controller asks to attachstream a connect-wait
2448 or resolve-wait stream.
2449 - Now do address rewriting when the controller asks us to attach
2450 to a particular circuit too. This will let Blossom specify
2451 "moria2.exit" without having to learn what moria2's IP address is.
2452 - Make the "tor --verify-config" command-line work again, so people
2453 can automatically check if their torrc will parse.
2454 - Authoritative dirservers no longer require an open connection from
2455 a server to consider him "reachable". We need this change because
2456 when we add new auth dirservers, old servers won't know not to
2458 - Let Tor build on Sun CC again.
2459 - Fix an off-by-one buffer size in dirserv.c that magically never
2460 hit our three authorities but broke sjmurdoch's own tor network.
2461 - If we as a directory mirror don't know of any v1 directory
2462 authorities, then don't try to cache any v1 directories.
2463 - Stop warning about unknown servers in our family when they are
2464 given as hex digests.
2465 - Stop complaining as quickly to the server operator that he
2466 hasn't registered his nickname/key binding.
2467 - Various cleanups so we can add new V2 Auth Dirservers.
2468 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
2469 reflect the updated flags in our v2 dir protocol.
2470 - Resume allowing non-printable characters for exit streams (both
2471 for connecting and for resolving). Now we tolerate applications
2472 that don't follow the RFCs. But continue to block malformed names
2475 o Bugfixes on 0.1.0.x:
2476 - Fix assert bug in close_logs(): when we close and delete logs,
2477 remove them all from the global "logfiles" list.
2478 - Fix minor integer overflow in calculating when we expect to use up
2479 our bandwidth allocation before hibernating.
2480 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
2481 there are multiple SSLs installed with different versions.
2482 - When we try to be a server and Address is not explicitly set and
2483 our hostname resolves to a private IP address, try to use an
2484 interface address if it has a public address. Now Windows machines
2485 that think of themselves as localhost can work by default.
2488 - Let the controller ask for GETINFO dir/server/foo so it can ask
2489 directly rather than connecting to the dir port.
2490 - Let the controller tell us about certain router descriptors
2491 that it doesn't want Tor to use in circuits. Implement
2492 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
2493 - New config option SafeSocks to reject all application connections
2494 using unsafe socks protocols. Defaults to off.
2497 Changes in version 0.1.1.15-rc - 2006-03-11
2498 o Bugfixes and cleanups:
2499 - When we're printing strings from the network, don't try to print
2500 non-printable characters. This protects us against shell escape
2501 sequence exploits, and also against attacks to fool humans into
2502 misreading their logs.
2503 - Fix a bug where Tor would fail to establish any connections if you
2504 left it off for 24 hours and then started it: we were happy with
2505 the obsolete network statuses, but they all referred to router
2506 descriptors that were too old to fetch, so we ended up with no
2507 valid router descriptors.
2508 - Fix a seg fault in the controller's "getinfo orconn-status"
2509 command while listing status on incoming handshaking connections.
2510 Introduce a status name "NEW" for these connections.
2511 - If we get a linelist or linelist_s config option from the torrc
2512 (e.g. ExitPolicy) and it has no value, warn and skip rather than
2513 silently resetting it to its default.
2514 - Don't abandon entry guards until they've been down or gone for
2516 - Cleaner and quieter log messages.
2519 - New controller signal NEWNYM that makes new application requests
2521 - Add a new circuit purpose 'controller' to let the controller ask
2522 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
2523 controller command to let you specify the purpose if you're
2524 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
2525 command to let you change a circuit's purpose after it's been
2527 - Accept "private:*" in routerdesc exit policies; not generated yet
2528 because older Tors do not understand it.
2529 - Add BSD-style contributed startup script "rc.subr" from Peter
2533 Changes in version 0.1.1.14-alpha - 2006-02-20
2534 o Bugfixes on 0.1.1.x:
2535 - Don't die if we ask for a stdout or stderr log (even implicitly)
2536 and we're set to RunAsDaemon -- just warn.
2537 - We still had a few bugs in the OR connection rotation code that
2538 caused directory servers to slowly aggregate connections to other
2539 fast Tor servers. This time for sure!
2540 - Make log entries on Win32 include the name of the function again.
2541 - We were treating a pair of exit policies if they were equal even
2542 if one said accept and the other said reject -- causing us to
2543 not always publish a new descriptor since we thought nothing
2545 - Retry pending server downloads as well as pending networkstatus
2546 downloads when we unexpectedly get a socks request.
2547 - We were ignoring the IS_FAST flag in the directory status,
2548 meaning we were willing to pick trivial-bandwidth nodes for "fast"
2550 - If the controller's SAVECONF command fails (e.g. due to file
2551 permissions), let the controller know that it failed.
2554 - If we're trying to be a Tor server and running Windows 95/98/ME
2555 as a server, explain that we'll likely crash.
2556 - When we're a server, a client asks for an old-style directory,
2557 and our write bucket is empty, don't give it to him. This way
2558 small servers can continue to serve the directory *sometimes*,
2559 without getting overloaded.
2560 - Compress exit policies even more -- look for duplicate lines
2562 - Clients now honor the "guard" flag in the router status when
2563 picking entry guards, rather than looking at is_fast or is_stable.
2564 - Retain unrecognized lines in $DATADIR/state file, so that we can
2565 be forward-compatible.
2566 - Generate 18.0.0.0/8 address policy format in descs when we can;
2567 warn when the mask is not reducible to a bit-prefix.
2568 - Let the user set ControlListenAddress in the torrc. This can be
2569 dangerous, but there are some cases (like a secured LAN) where it
2571 - Split ReachableAddresses into ReachableDirAddresses and
2572 ReachableORAddresses, so we can restrict Dir conns to port 80
2573 and OR conns to port 443.
2574 - Now we can target arch and OS in rpm builds (contributed by
2575 Phobos). Also make the resulting dist-rpm filename match the
2577 - New config options to help controllers: FetchServerDescriptors
2578 and FetchHidServDescriptors for whether to fetch server
2579 info and hidserv info or let the controller do it, and
2580 PublishServerDescriptor and PublishHidServDescriptors.
2581 - Also let the controller set the __AllDirActionsPrivate config
2582 option if you want all directory fetches/publishes to happen via
2583 Tor (it assumes your controller bootstraps your circuits).
2586 Changes in version 0.1.0.17 - 2006-02-17
2587 o Crash bugfixes on 0.1.0.x:
2588 - When servers with a non-zero DirPort came out of hibernation,
2589 sometimes they would trigger an assert.
2591 o Other important bugfixes:
2592 - On platforms that don't have getrlimit (like Windows), we were
2593 artificially constraining ourselves to a max of 1024
2594 connections. Now just assume that we can handle as many as 15000
2595 connections. Hopefully this won't cause other problems.
2597 o Backported features:
2598 - When we're a server, a client asks for an old-style directory,
2599 and our write bucket is empty, don't give it to him. This way
2600 small servers can continue to serve the directory *sometimes*,
2601 without getting overloaded.
2602 - Whenever you get a 503 in response to a directory fetch, try
2603 once more. This will become important once servers start sending
2604 503's whenever they feel busy.
2605 - Fetch a new directory every 120 minutes, not every 40 minutes.
2606 Now that we have hundreds of thousands of users running the old
2607 directory algorithm, it's starting to hurt a lot.
2608 - Bump up the period for forcing a hidden service descriptor upload
2609 from 20 minutes to 1 hour.
2612 Changes in version 0.1.1.13-alpha - 2006-02-09
2613 o Crashes in 0.1.1.x:
2614 - When you tried to setconf ORPort via the controller, Tor would
2615 crash. So people using TorCP to become a server were sad.
2616 - Solve (I hope) the stack-smashing bug that we were seeing on fast
2617 servers. The problem appears to be something do with OpenSSL's
2618 random number generation, or how we call it, or something. Let me
2619 know if the crashes continue.
2620 - Turn crypto hardware acceleration off by default, until we find
2621 somebody smart who can test it for us. (It appears to produce
2622 seg faults in at least some cases.)
2623 - Fix a rare assert error when we've tried all intro points for
2624 a hidden service and we try fetching the service descriptor again:
2625 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
2628 - Fix a major load balance bug: we were round-robining in 16 KB
2629 chunks, and servers with bandwidthrate of 20 KB, while downloading
2630 a 600 KB directory, would starve their other connections. Now we
2631 try to be a bit more fair.
2632 - Dir authorities and mirrors were never expiring the newest
2633 descriptor for each server, causing memory and directory bloat.
2634 - Fix memory-bloating and connection-bloating bug on servers: We
2635 were never closing any connection that had ever had a circuit on
2636 it, because we were checking conn->n_circuits == 0, yet we had a
2637 bug that let it go negative.
2638 - Make Tor work using squid as your http proxy again -- squid
2639 returns an error if you ask for a URL that's too long, and it uses
2640 a really generic error message. Plus, many people are behind a
2641 transparent squid so they don't even realize it.
2642 - On platforms that don't have getrlimit (like Windows), we were
2643 artificially constraining ourselves to a max of 1024
2644 connections. Now just assume that we can handle as many as 15000
2645 connections. Hopefully this won't cause other problems.
2646 - Add a new config option ExitPolicyRejectPrivate which defaults to
2647 1. This means all exit policies will begin with rejecting private
2648 addresses, unless the server operator explicitly turns it off.
2651 - Clients no longer download descriptors for non-running
2653 - Before we add new directory authorities, we should make it
2654 clear that only v1 authorities should receive/publish hidden
2655 service descriptors.
2658 - As soon as we've fetched some more directory info, immediately
2659 try to download more server descriptors. This way we don't have
2660 a 10 second pause during initial bootstrapping.
2661 - Remove even more loud log messages that the server operator can't
2663 - When we're running an obsolete or un-recommended version, make
2664 the log message more clear about what the problem is and what
2665 versions *are* still recommended.
2666 - Provide a more useful warn message when our onion queue gets full:
2667 the CPU is too slow or the exit policy is too liberal.
2668 - Don't warn when we receive a 503 from a dirserver/cache -- this
2669 will pave the way for them being able to refuse if they're busy.
2670 - When we fail to bind a listener, try to provide a more useful
2671 log message: e.g., "Is Tor already running?"
2672 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
2673 Goldberg can prove things about our handshake protocol more
2675 - MaxConn has been obsolete for a while now. Document the ConnLimit
2676 config option, which is a *minimum* number of file descriptors
2677 that must be available else Tor refuses to start.
2678 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
2679 if you log to syslog and want something other than LOG_DAEMON.
2680 - Make dirservers generate a separate "guard" flag to mean,
2681 "would make a good entry guard". Make clients parse it and vote
2682 on it. Not used by clients yet.
2683 - Implement --with-libevent-dir option to ./configure. Also, improve
2684 search techniques to find libevent, and use those for openssl too.
2685 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
2686 - Only start testing reachability once we've established a
2687 circuit. This will make startup on dirservers less noisy.
2688 - Don't try to upload hidden service descriptors until we have
2689 established a circuit.
2690 - Fix the controller's "attachstream 0" command to treat conn like
2691 it just connected, doing address remapping, handling .exit and
2692 .onion idioms, and so on. Now we're more uniform in making sure
2693 that the controller hears about new and closing connections.
2696 Changes in version 0.1.1.12-alpha - 2006-01-11
2697 o Bugfixes on 0.1.1.x:
2698 - The fix to close duplicate server connections was closing all
2699 Tor client connections if they didn't establish a circuit
2700 quickly enough. Oops.
2701 - Fix minor memory issue (double-free) that happened on exit.
2703 o Bugfixes on 0.1.0.x:
2704 - Tor didn't warn when it failed to open a log file.
2707 Changes in version 0.1.1.11-alpha - 2006-01-10
2708 o Crashes in 0.1.1.x:
2709 - Include all the assert/crash fixes from 0.1.0.16.
2710 - If you start Tor and then quit very quickly, there were some
2711 races that tried to free things that weren't allocated yet.
2712 - Fix a rare memory stomp if you're running hidden services.
2713 - Fix segfault when specifying DirServer in config without nickname.
2714 - Fix a seg fault when you finish connecting to a server but at
2715 that moment you dump his server descriptor.
2716 - Extendcircuit and Attachstream controller commands would
2717 assert/crash if you don't give them enough arguments.
2718 - Fix an assert error when we're out of space in the connection_list
2719 and we try to post a hidden service descriptor (reported by weasel).
2720 - If you specify a relative torrc path and you set RunAsDaemon in
2721 your torrc, then it chdir()'s to the new directory. If you HUP,
2722 it tries to load the new torrc location, fails, and exits.
2723 The fix: no longer allow a relative path to torrc using -f.
2726 - Implement "entry guards": automatically choose a handful of entry
2727 nodes and stick with them for all circuits. Only pick new guards
2728 when the ones you have are unsuitable, and if the old guards
2729 become suitable again, switch back. This will increase security
2730 dramatically against certain end-point attacks. The EntryNodes
2731 config option now provides some hints about which entry guards you
2732 want to use most; and StrictEntryNodes means to only use those.
2733 - New directory logic: download by descriptor digest, not by
2734 fingerprint. Caches try to download all listed digests from
2735 authorities; clients try to download "best" digests from caches.
2736 This avoids partitioning and isolating attacks better.
2737 - Make the "stable" router flag in network-status be the median of
2738 the uptimes of running valid servers, and make clients pay
2739 attention to the network-status flags. Thus the cutoff adapts
2740 to the stability of the network as a whole, making IRC, IM, etc
2741 connections more reliable.
2744 - Tor servers with dynamic IP addresses were needing to wait 18
2745 hours before they could start doing reachability testing using
2746 the new IP address and ports. This is because they were using
2747 the internal descriptor to learn what to test, yet they were only
2748 rebuilding the descriptor once they decided they were reachable.
2749 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
2750 to download certain server descriptors, throw them away, and then
2751 fetch them again after 30 minutes. Now mirrors throw away these
2752 server descriptors so clients can't get them.
2753 - We were leaving duplicate connections to other ORs open for a week,
2754 rather than closing them once we detect a duplicate. This only
2755 really affected authdirservers, but it affected them a lot.
2756 - Spread the authdirservers' reachability testing over the entire
2757 testing interval, so we don't try to do 500 TLS's at once every
2761 - If the network is down, and we try to connect to a conn because
2762 we have a circuit in mind, and we timeout (30 seconds) because the
2763 network never answers, we were expiring the circuit, but we weren't
2764 obsoleting the connection or telling the entry_guards functions.
2765 - Some Tor servers process billions of cells per day. These statistics
2766 need to be uint64_t's.
2767 - Check for integer overflows in more places, when adding elements
2768 to smartlists. This could possibly prevent a buffer overflow
2769 on malicious huge inputs. I don't see any, but I haven't looked
2771 - ReachableAddresses kept growing new "reject *:*" lines on every
2773 - When you "setconf log" via the controller, it should remove all
2774 logs. We were automatically adding back in a "log notice stdout".
2775 - Newly bootstrapped Tor networks couldn't establish hidden service
2776 circuits until they had nodes with high uptime. Be more tolerant.
2777 - We were marking servers down when they could not answer every piece
2778 of the directory request we sent them. This was far too harsh.
2779 - Fix the torify (tsocks) config file to not use Tor for localhost
2781 - Directory authorities now go to the proper authority when asking for
2782 a networkstatus, even when they want a compressed one.
2783 - Fix a harmless bug that was causing Tor servers to log
2784 "Got an end because of misc error, but we're not an AP. Closing."
2785 - Authorities were treating their own descriptor changes as cosmetic,
2786 meaning the descriptor available in the network-status and the
2787 descriptor that clients downloaded were different.
2788 - The OS X installer was adding a symlink for tor_resolve but
2789 the binary was called tor-resolve (reported by Thomas Hardly).
2790 - Workaround a problem with some http proxies where they refuse GET
2791 requests that specify "Content-Length: 0" (reported by Adrian).
2792 - Fix wrong log message when you add a "HiddenServiceNodes" config
2793 line without any HiddenServiceDir line (reported by Chris Thomas).
2796 - Write the TorVersion into the state file so we have a prayer of
2797 keeping forward and backward compatibility.
2798 - Revive the FascistFirewall config option rather than eliminating it:
2799 now it's a synonym for ReachableAddresses *:80,*:443.
2800 - Clients choose directory servers from the network status lists,
2801 not from their internal list of router descriptors. Now they can
2802 go to caches directly rather than needing to go to authorities
2804 - Directory authorities ignore router descriptors that have only
2805 cosmetic differences: do this for 0.1.0.x servers now too.
2806 - Add a new flag to network-status indicating whether the server
2807 can answer v2 directory requests too.
2808 - Authdirs now stop whining so loudly about bad descriptors that
2809 they fetch from other dirservers. So when there's a log complaint,
2810 it's for sure from a freshly uploaded descriptor.
2811 - Reduce memory requirements in our structs by changing the order
2813 - There used to be two ways to specify your listening ports in a
2814 server descriptor: on the "router" line and with a separate "ports"
2815 line. Remove support for the "ports" line.
2816 - New config option "AuthDirRejectUnlisted" for auth dirservers as
2817 a panic button: if we get flooded with unusable servers we can
2818 revert to only listing servers in the approved-routers file.
2819 - Auth dir servers can now mark a fingerprint as "!reject" or
2820 "!invalid" in the approved-routers file (as its nickname), to
2821 refuse descriptors outright or include them but marked as invalid.
2822 - Servers store bandwidth history across restarts/crashes.
2823 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
2824 get a better idea of why their circuits failed. Not used yet.
2825 - Directory mirrors now cache up to 16 unrecognized network-status
2826 docs. Now we can add new authdirservers and they'll be cached too.
2827 - When picking a random directory, prefer non-authorities if any
2829 - New controller option "getinfo desc/all-recent" to fetch the
2830 latest server descriptor for every router that Tor knows about.
2833 Changes in version 0.1.0.16 - 2006-01-02
2834 o Crash bugfixes on 0.1.0.x:
2835 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
2836 corrupting the heap, losing FDs, or crashing when we need to resize
2837 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
2838 - It turns out sparc64 platforms crash on unaligned memory access
2839 too -- so detect and avoid this.
2840 - Handle truncated compressed data correctly (by detecting it and
2842 - Fix possible-but-unlikely free(NULL) in control.c.
2843 - When we were closing connections, there was a rare case that
2844 stomped on memory, triggering seg faults and asserts.
2845 - Avoid potential infinite recursion when building a descriptor. (We
2846 don't know that it ever happened, but better to fix it anyway.)
2847 - We were neglecting to unlink marked circuits from soon-to-close OR
2848 connections, which caused some rare scribbling on freed memory.
2849 - Fix a memory stomping race bug when closing the joining point of two
2850 rendezvous circuits.
2851 - Fix an assert in time parsing found by Steven Murdoch.
2853 o Other bugfixes on 0.1.0.x:
2854 - When we're doing reachability testing, provide more useful log
2855 messages so the operator knows what to expect.
2856 - Do not check whether DirPort is reachable when we are suppressing
2857 advertising it because of hibernation.
2858 - When building with -static or on Solaris, we sometimes needed -ldl.
2859 - When we're deciding whether a stream has enough circuits around
2860 that can handle it, count the freshly dirty ones and not the ones
2861 that are so dirty they won't be able to handle it.
2862 - When we're expiring old circuits, we had a logic error that caused
2863 us to close new rendezvous circuits rather than old ones.
2864 - Give a more helpful log message when you try to change ORPort via
2865 the controller: you should upgrade Tor if you want that to work.
2866 - We were failing to parse Tor versions that start with "Tor ".
2867 - Tolerate faulty streams better: when a stream fails for reason
2868 exitpolicy, stop assuming that the router is lying about his exit
2869 policy. When a stream fails for reason misc, allow it to retry just
2870 as if it was resolvefailed. When a stream has failed three times,
2871 reset its failure count so we can try again and get all three tries.
2874 Changes in version 0.1.1.10-alpha - 2005-12-11
2875 o Correctness bugfixes on 0.1.0.x:
2876 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
2877 corrupting the heap, losing FDs, or crashing when we need to resize
2878 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
2879 - Stop doing the complex voodoo overkill checking for insecure
2880 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
2881 - When we were closing connections, there was a rare case that
2882 stomped on memory, triggering seg faults and asserts.
2883 - We were neglecting to unlink marked circuits from soon-to-close OR
2884 connections, which caused some rare scribbling on freed memory.
2885 - When we're deciding whether a stream has enough circuits around
2886 that can handle it, count the freshly dirty ones and not the ones
2887 that are so dirty they won't be able to handle it.
2888 - Recover better from TCP connections to Tor servers that are
2889 broken but don't tell you (it happens!); and rotate TLS
2890 connections once a week.
2891 - When we're expiring old circuits, we had a logic error that caused
2892 us to close new rendezvous circuits rather than old ones.
2893 - Fix a scary-looking but apparently harmless bug where circuits
2894 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
2895 servers, and never switch to state CIRCUIT_STATE_OPEN.
2896 - When building with -static or on Solaris, we sometimes needed to
2898 - Give a useful message when people run Tor as the wrong user,
2899 rather than telling them to start chowning random directories.
2900 - We were failing to inform the controller about new .onion streams.
2902 o Security bugfixes on 0.1.0.x:
2903 - Refuse server descriptors if the fingerprint line doesn't match
2904 the included identity key. Tor doesn't care, but other apps (and
2905 humans) might actually be trusting the fingerprint line.
2906 - We used to kill the circuit when we receive a relay command we
2907 don't recognize. Now we just drop it.
2908 - Start obeying our firewall options more rigorously:
2909 . If we can't get to a dirserver directly, try going via Tor.
2910 . Don't ever try to connect (as a client) to a place our
2911 firewall options forbid.
2912 . If we specify a proxy and also firewall options, obey the
2913 firewall options even when we're using the proxy: some proxies
2914 can only proxy to certain destinations.
2915 - Fix a bug found by Lasse Overlier: when we were making internal
2916 circuits (intended to be cannibalized later for rendezvous and
2917 introduction circuits), we were picking them so that they had
2918 useful exit nodes. There was no need for this, and it actually
2919 aids some statistical attacks.
2920 - Start treating internal circuits and exit circuits separately.
2921 It's important to keep them separate because internal circuits
2922 have their last hops picked like middle hops, rather than like
2923 exit hops. So exiting on them will break the user's expectations.
2925 o Bugfixes on 0.1.1.x:
2926 - Take out the mis-feature where we tried to detect IP address
2927 flapping for people with DynDNS, and chose not to upload a new
2928 server descriptor sometimes.
2929 - Try to be compatible with OpenSSL 0.9.6 again.
2930 - Log fix: when the controller is logging about .onion addresses,
2931 sometimes it didn't include the ".onion" part of the address.
2932 - Don't try to modify options->DirServers internally -- if the
2933 user didn't specify any, just add the default ones directly to
2934 the trusted dirserver list. This fixes a bug where people running
2935 controllers would use SETCONF on some totally unrelated config
2936 option, and Tor would start yelling at them about changing their
2938 - Let the controller's redirectstream command specify a port, in
2939 case the controller wants to change that too.
2940 - When we requested a pile of server descriptors, we sometimes
2941 accidentally launched a duplicate request for the first one.
2942 - Bugfix for trackhostexits: write down the fingerprint of the
2943 chosen exit, not its nickname, because the chosen exit might not
2945 - When parsing foo.exit, if foo is unknown, and we are leaving
2946 circuits unattached, set the chosen_exit field and leave the
2947 address empty. This matters because controllers got confused
2949 - Directory authorities no longer try to download server
2950 descriptors that they know they will reject.
2952 o Features and updates:
2953 - Replace balanced trees with hash tables: this should make stuff
2954 significantly faster.
2955 - Resume using the AES counter-mode implementation that we ship,
2956 rather than OpenSSL's. Ours is significantly faster.
2957 - Many other CPU and memory improvements.
2958 - Add a new config option FastFirstHopPK (on by default) so clients
2959 do a trivial crypto handshake for their first hop, since TLS has
2960 already taken care of confidentiality and authentication.
2961 - Add a new config option TestSocks so people can see if their
2962 applications are using socks4, socks4a, socks5-with-ip, or
2963 socks5-with-hostname. This way they don't have to keep mucking
2964 with tcpdump and wondering if something got cached somewhere.
2965 - Warn when listening on a public address for socks. I suspect a
2966 lot of people are setting themselves up as open socks proxies,
2967 and they have no idea that jerks on the Internet are using them,
2968 since they simply proxy the traffic into the Tor network.
2969 - Add "private:*" as an alias in configuration for policies. Now
2970 you can simplify your exit policy rather than needing to list
2971 every single internal or nonroutable network space.
2972 - Add a new controller event type that allows controllers to get
2973 all server descriptors that were uploaded to a router in its role
2974 as authoritative dirserver.
2975 - Start shipping socks-extensions.txt, tor-doc-unix.html,
2976 tor-doc-server.html, and stylesheet.css in the tarball.
2977 - Stop shipping tor-doc.html in the tarball.
2980 Changes in version 0.1.1.9-alpha - 2005-11-15
2981 o Usability improvements:
2982 - Start calling it FooListenAddress rather than FooBindAddress,
2983 since few of our users know what it means to bind an address
2985 - Reduce clutter in server logs. We're going to try to make
2986 them actually usable now. New config option ProtocolWarnings that
2987 lets you hear about how _other Tors_ are breaking the protocol. Off
2989 - Divide log messages into logging domains. Once we put some sort
2990 of interface on this, it will let people looking at more verbose
2991 log levels specify the topics they want to hear more about.
2992 - Make directory servers return better http 404 error messages
2993 instead of a generic "Servers unavailable".
2994 - Check for even more Windows version flags when writing the platform
2995 string in server descriptors, and note any we don't recognize.
2996 - Clean up more of the OpenSSL memory when exiting, so we can detect
2997 memory leaks better.
2998 - Make directory authorities be non-versioning, non-naming by
2999 default. Now we can add new directory servers without requiring
3000 their operators to pay close attention.
3001 - When logging via syslog, include the pid whenever we provide
3002 a log entry. Suggested by Todd Fries.
3004 o Performance improvements:
3005 - Directory servers now silently throw away new descriptors that
3006 haven't changed much if the timestamps are similar. We do this to
3007 tolerate older Tor servers that upload a new descriptor every 15
3008 minutes. (It seemed like a good idea at the time.)
3009 - Inline bottleneck smartlist functions; use fast versions by default.
3010 - Add a "Map from digest to void*" abstraction digestmap_t so we
3011 can do less hex encoding/decoding. Use it in router_get_by_digest()
3012 to resolve a performance bottleneck.
3013 - Allow tor_gzip_uncompress to extract as much as possible from
3014 truncated compressed data. Try to extract as many
3015 descriptors as possible from truncated http responses (when
3016 DIR_PURPOSE_FETCH_ROUTERDESC).
3017 - Make circ->onionskin a pointer, not a static array. moria2 was using
3018 125000 circuit_t's after it had been up for a few weeks, which
3019 translates to 20+ megs of wasted space.
3020 - The private half of our EDH handshake keys are now chosen out
3021 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
3023 o Security improvements:
3024 - Start making directory caches retain old routerinfos, so soon
3025 clients can start asking by digest of descriptor rather than by
3026 fingerprint of server.
3027 - Add half our entropy from RAND_poll in OpenSSL. This knows how
3028 to use egd (if present), openbsd weirdness (if present), vms/os2
3029 weirdness (if we ever port there), and more in the future.
3031 o Bugfixes on 0.1.0.x:
3032 - Do round-robin writes of at most 16 kB per write. This might be
3033 more fair on loaded Tor servers, and it might resolve our Windows
3034 crash bug. It might also slow things down.
3035 - Our TLS handshakes were generating a single public/private
3036 keypair for the TLS context, rather than making a new one for
3037 each new connections. Oops. (But we were still rotating them
3038 periodically, so it's not so bad.)
3039 - When we were cannibalizing a circuit with a particular exit
3040 node in mind, we weren't checking to see if that exit node was
3041 already present earlier in the circuit. Oops.
3042 - When a Tor server's IP changes (e.g. from a dyndns address),
3043 upload a new descriptor so clients will learn too.
3044 - Really busy servers were keeping enough circuits open on stable
3045 connections that they were wrapping around the circuit_id
3046 space. (It's only two bytes.) This exposed a bug where we would
3047 feel free to reuse a circuit_id even if it still exists but has
3048 been marked for close. Try to fix this bug. Some bug remains.
3049 - If we would close a stream early (e.g. it asks for a .exit that
3050 we know would refuse it) but the LeaveStreamsUnattached config
3051 option is set by the controller, then don't close it.
3053 o Bugfixes on 0.1.1.8-alpha:
3054 - Fix a big pile of memory leaks, some of them serious.
3055 - Do not try to download a routerdesc if we would immediately reject
3057 - Resume inserting a newline between all router descriptors when
3058 generating (old style) signed directories, since our spec says
3060 - When providing content-type application/octet-stream for
3061 server descriptors using .z, we were leaving out the
3062 content-encoding header. Oops. (Everything tolerated this just
3063 fine, but that doesn't mean we need to be part of the problem.)
3064 - Fix a potential seg fault in getconf and getinfo using version 1
3065 of the controller protocol.
3066 - Avoid crash: do not check whether DirPort is reachable when we
3067 are suppressing it because of hibernation.
3068 - Make --hash-password not crash on exit.
3071 Changes in version 0.1.1.8-alpha - 2005-10-07
3072 o New features (major):
3073 - Clients don't download or use the directory anymore. Now they
3074 download and use network-statuses from the trusted dirservers,
3075 and fetch individual server descriptors as needed from mirrors.
3076 See dir-spec.txt for all the gory details.
3077 - Be more conservative about whether to advertise our DirPort.
3078 The main change is to not advertise if we're running at capacity
3079 and either a) we could hibernate or b) our capacity is low and
3080 we're using a default DirPort.
3081 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
3083 o New features (minor):
3084 - Try to be smart about when to retry network-status and
3085 server-descriptor fetches. Still needs some tuning.
3086 - Stop parsing, storing, or using running-routers output (but
3087 mirrors still cache and serve it).
3088 - Consider a threshold of versioning dirservers (dirservers who have
3089 an opinion about which Tor versions are still recommended) before
3090 deciding whether to warn the user that he's obsolete.
3091 - Dirservers can now reject/invalidate by key and IP, with the
3092 config options "AuthDirInvalid" and "AuthDirReject". This is
3093 useful since currently we automatically list servers as running
3094 and usable even if we know they're jerks.
3095 - Provide dire warnings to any users who set DirServer; move it out
3096 of torrc.sample and into torrc.complete.
3097 - Add MyFamily to torrc.sample in the server section.
3098 - Add nicknames to the DirServer line, so we can refer to them
3099 without requiring all our users to memorize their IP addresses.
3100 - When we get an EOF or a timeout on a directory connection, note
3101 how many bytes of serverdesc we are dropping. This will help
3102 us determine whether it is smart to parse incomplete serverdesc
3104 - Add a new function to "change pseudonyms" -- that is, to stop
3105 using any currently-dirty circuits for new streams, so we don't
3106 link new actions to old actions. Currently it's only called on
3107 HUP (or SIGNAL RELOAD).
3108 - On sighup, if UseHelperNodes changed to 1, use new circuits.
3109 - Start using RAND_bytes rather than RAND_pseudo_bytes from
3110 OpenSSL. Also, reseed our entropy every hour, not just at
3111 startup. And entropy in 512-bit chunks, not 160-bit chunks.
3113 o Fixes on 0.1.1.7-alpha:
3114 - Nobody ever implemented EVENT_ADDRMAP for control protocol
3115 version 0, so don't let version 0 controllers ask for it.
3116 - If you requested something with too many newlines via the
3117 v1 controller protocol, you could crash tor.
3118 - Fix a number of memory leaks, including some pretty serious ones.
3119 - Re-enable DirPort testing again, so Tor servers will be willing
3120 to advertise their DirPort if it's reachable.
3121 - On TLS handshake, only check the other router's nickname against
3122 its expected nickname if is_named is set.
3124 o Fixes forward-ported from 0.1.0.15:
3125 - Don't crash when we don't have any spare file descriptors and we
3126 try to spawn a dns or cpu worker.
3127 - Make the numbers in read-history and write-history into uint64s,
3128 so they don't overflow and publish negatives in the descriptor.
3131 - For the OS X package's modified privoxy config file, comment
3132 out the "logfile" line so we don't log everything passed
3134 - We were whining about using socks4 or socks5-with-local-lookup
3135 even when it's an IP in the "virtual" range we designed exactly
3137 - We were leaking some memory every time the client changes IPs.
3138 - Never call free() on tor_malloc()d memory. This will help us
3139 use dmalloc to detect memory leaks.
3140 - Check for named servers when looking them up by nickname;
3141 warn when we'recalling a non-named server by its nickname;
3142 don't warn twice about the same name.
3143 - Try to list MyFamily elements by key, not by nickname, and warn
3144 if we've not heard of the server.
3145 - Make windows platform detection (uname equivalent) smarter.
3146 - It turns out sparc64 doesn't like unaligned access either.
3149 Changes in version 0.1.0.15 - 2005-09-23
3150 o Bugfixes on 0.1.0.x:
3151 - Reject ports 465 and 587 (spam targets) in default exit policy.
3152 - Don't crash when we don't have any spare file descriptors and we
3153 try to spawn a dns or cpu worker.
3154 - Get rid of IgnoreVersion undocumented config option, and make us
3155 only warn, never exit, when we're running an obsolete version.
3156 - Don't try to print a null string when your server finds itself to
3157 be unreachable and the Address config option is empty.
3158 - Make the numbers in read-history and write-history into uint64s,
3159 so they don't overflow and publish negatives in the descriptor.
3160 - Fix a minor memory leak in smartlist_string_remove().
3161 - We were only allowing ourselves to upload a server descriptor at
3162 most every 20 minutes, even if it changed earlier than that.
3163 - Clean up log entries that pointed to old URLs.
3166 Changes in version 0.1.1.7-alpha - 2005-09-14
3167 o Fixes on 0.1.1.6-alpha:
3168 - Exit servers were crashing when people asked them to make a
3169 connection to an address not in their exit policy.
3170 - Looking up a non-existent stream for a v1 control connection would
3172 - Fix a seg fault if we ask a dirserver for a descriptor by
3173 fingerprint but he doesn't know about him.
3174 - SETCONF was appending items to linelists, not clearing them.
3175 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
3176 out and refuse the setconf if it would fail.
3177 - Downgrade the dirserver log messages when whining about
3181 - Add Peter Palfrader's check-tor script to tor/contrib/
3182 It lets you easily check whether a given server (referenced by
3183 nickname) is reachable by you.
3184 - Numerous changes to move towards client-side v2 directories. Not
3188 - If the user gave tor an odd number of command-line arguments,
3189 we were silently ignoring the last one. Now we complain and fail.
3190 [This wins the oldest-bug prize -- this bug has been present since
3191 November 2002, as released in Tor 0.0.0.]
3192 - Do not use unaligned memory access on alpha, mips, or mipsel.
3193 It *works*, but is very slow, so we treat them as if it doesn't.
3194 - Retry directory requests if we fail to get an answer we like
3195 from a given dirserver (we were retrying before, but only if
3196 we fail to connect).
3197 - When writing the RecommendedVersions line, sort them first.
3198 - When the client asked for a rendezvous port that the hidden
3199 service didn't want to provide, we were sending an IP address
3200 back along with the end cell. Fortunately, it was zero. But stop
3202 - Correct "your server is reachable" log entries to indicate that
3203 it was self-testing that told us so.
3206 Changes in version 0.1.1.6-alpha - 2005-09-09
3207 o Fixes on 0.1.1.5-alpha:
3208 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
3209 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
3210 - Fix bug with tor_memmem finding a match at the end of the string.
3211 - Make unit tests run without segfaulting.
3212 - Resolve some solaris x86 compile warnings.
3213 - Handle duplicate lines in approved-routers files without warning.
3214 - Fix bug where as soon as a server refused any requests due to his
3215 exit policy (e.g. when we ask for localhost and he tells us that's
3216 127.0.0.1 and he won't do it), we decided he wasn't obeying his
3217 exit policy using him for any exits.
3218 - Only do openssl hardware accelerator stuff if openssl version is
3221 o New controller features/fixes:
3222 - Add a "RESETCONF" command so you can set config options like
3223 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
3224 a config option in the torrc with no value, then it clears it
3225 entirely (rather than setting it to its default).
3226 - Add a "GETINFO config-file" to tell us where torrc is.
3227 - Avoid sending blank lines when GETINFO replies should be empty.
3228 - Add a QUIT command for the controller (for using it manually).
3229 - Fix a bug in SAVECONF that was adding default dirservers and
3230 other redundant entries to the torrc file.
3232 o Start on the new directory design:
3233 - Generate, publish, cache, serve new network-status format.
3234 - Publish individual descriptors (by fingerprint, by "all", and by
3236 - Publish client and server recommended versions separately.
3237 - Allow tor_gzip_uncompress() to handle multiple concatenated
3238 compressed strings. Serve compressed groups of router
3239 descriptors. The compression logic here could be more
3241 - Distinguish v1 authorities (all currently trusted directories)
3242 from v2 authorities (all trusted directories).
3243 - Change DirServers config line to note which dirs are v1 authorities.
3244 - Add configuration option "V1AuthoritativeDirectory 1" which
3245 moria1, moria2, and tor26 should set.
3246 - Remove option when getting directory cache to see whether they
3247 support running-routers; they all do now. Replace it with one
3248 to see whether caches support v2 stuff.
3251 - Dirservers now do their own external reachability testing of each
3252 Tor server, and only list them as running if they've been found to
3253 be reachable. We also send back warnings to the server's logs if
3254 it uploads a descriptor that we already believe is unreachable.
3255 - Implement exit enclaves: if we know an IP address for the
3256 destination, and there's a running Tor server at that address
3257 which allows exit to the destination, then extend the circuit to
3258 that exit first. This provides end-to-end encryption and end-to-end
3259 authentication. Also, if the user wants a .exit address or enclave,
3260 use 4 hops rather than 3, and cannibalize a general circ for it
3262 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
3263 controller. Also, rotate dns and cpu workers if the controller
3264 changes options that will affect them; and initialize the dns
3265 worker cache tree whether or not we start out as a server.
3266 - Only upload a new server descriptor when options change, 18
3267 hours have passed, uptime is reset, or bandwidth changes a lot.
3268 - Check [X-]Forwarded-For headers in HTTP requests when generating
3269 log messages. This lets people run dirservers (and caches) behind
3270 Apache but still know which IP addresses are causing warnings.
3272 o Config option changes:
3273 - Replace (Fascist)Firewall* config options with a new
3274 ReachableAddresses option that understands address policies.
3275 For example, "ReachableAddresses *:80,*:443"
3276 - Get rid of IgnoreVersion undocumented config option, and make us
3277 only warn, never exit, when we're running an obsolete version.
3278 - Make MonthlyAccountingStart config option truly obsolete now.
3281 - Reject ports 465 and 587 in the default exit policy, since
3282 people have started using them for spam too.
3283 - It turns out we couldn't bootstrap a network since we added
3284 reachability detection in 0.1.0.1-rc. Good thing the Tor network
3285 has never gone down. Add an AssumeReachable config option to let
3286 servers and dirservers bootstrap. When we're trying to build a
3287 high-uptime or high-bandwidth circuit but there aren't enough
3288 suitable servers, try being less picky rather than simply failing.
3289 - Our logic to decide if the OR we connected to was the right guy
3290 was brittle and maybe open to a mitm for unverified routers.
3291 - We weren't cannibalizing circuits correctly for
3292 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
3293 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
3294 build those from scratch. This should make hidden services faster.
3295 - Predict required circuits better, with an eye toward making hidden
3296 services faster on the service end.
3297 - Retry streams if the exit node sends back a 'misc' failure. This
3298 should result in fewer random failures. Also, after failing
3299 from resolve failed or misc, reset the num failures, so we give
3300 it a fair shake next time we try.
3301 - Clean up the rendezvous warn log msgs, and downgrade some to info.
3302 - Reduce severity on logs about dns worker spawning and culling.
3303 - When we're shutting down and we do something like try to post a
3304 server descriptor or rendezvous descriptor, don't complain that
3305 we seem to be unreachable. Of course we are, we're shutting down.
3306 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
3307 We don't use them yet, but maybe one day our DNS resolver will be
3308 able to discover them.
3309 - Make ContactInfo mandatory for authoritative directory servers.
3310 - Require server descriptors to list IPv4 addresses -- hostnames
3311 are no longer allowed. This also fixes some potential security
3312 problems with people providing hostnames as their address and then
3313 preferentially resolving them to partition users.
3314 - Change log line for unreachability to explicitly suggest /etc/hosts
3315 as the culprit. Also make it clearer what IP address and ports we're
3316 testing for reachability.
3317 - Put quotes around user-supplied strings when logging so users are
3318 more likely to realize if they add bad characters (like quotes)
3320 - Let auth dir servers start without specifying an Address config
3322 - Make unit tests (and other invocations that aren't the real Tor)
3323 run without launching listeners, creating subdirectories, and so on.
3326 Changes in version 0.1.1.5-alpha - 2005-08-08
3327 o Bugfixes included in 0.1.0.14.
3329 o Bugfixes on 0.1.0.x:
3330 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
3331 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
3332 it would silently using ignore the 6668.
3335 Changes in version 0.1.0.14 - 2005-08-08
3336 o Bugfixes on 0.1.0.x:
3337 - Fix the other half of the bug with crypto handshakes
3339 - Fix an assert trigger if you send a 'signal term' via the
3340 controller when it's listening for 'event info' messages.
3343 Changes in version 0.1.1.4-alpha - 2005-08-04
3344 o Bugfixes included in 0.1.0.13.
3347 - Improve tor_gettimeofday() granularity on windows.
3348 - Make clients regenerate their keys when their IP address changes.
3349 - Implement some more GETINFO goodness: expose helper nodes, config
3350 options, getinfo keys.
3353 Changes in version 0.1.0.13 - 2005-08-04
3354 o Bugfixes on 0.1.0.x:
3355 - Fix a critical bug in the security of our crypto handshakes.
3356 - Fix a size_t underflow in smartlist_join_strings2() that made
3357 it do bad things when you hand it an empty smartlist.
3358 - Fix Windows installer to ship Tor license (thanks to Aphex for
3359 pointing out this oversight) and put a link to the doc directory
3361 - Explicitly set no-unaligned-access for sparc: it turns out the
3362 new gcc's let you compile broken code, but that doesn't make it
3366 Changes in version 0.1.1.3-alpha - 2005-07-23
3367 o Bugfixes on 0.1.1.2-alpha:
3368 - Fix a bug in handling the controller's "post descriptor"
3370 - Fix several bugs in handling the controller's "extend circuit"
3372 - Fix a bug in handling the controller's "stream status" event.
3373 - Fix an assert failure if we have a controller listening for
3374 circuit events and we go offline.
3375 - Re-allow hidden service descriptors to publish 0 intro points.
3376 - Fix a crash when generating your hidden service descriptor if
3377 you don't have enough intro points already.
3379 o New features on 0.1.1.2-alpha:
3380 - New controller function "getinfo accounting", to ask how
3381 many bytes we've used in this time period.
3382 - Experimental support for helper nodes: a lot of the risk from
3383 a small static adversary comes because users pick new random
3384 nodes every time they rebuild a circuit. Now users will try to
3385 stick to the same small set of entry nodes if they can. Not
3386 enabled by default yet.
3388 o Bugfixes on 0.1.0.12:
3389 - If you're an auth dir server, always publish your dirport,
3390 even if you haven't yet found yourself to be reachable.
3391 - Fix a size_t underflow in smartlist_join_strings2() that made
3392 it do bad things when you hand it an empty smartlist.
3395 Changes in version 0.1.0.12 - 2005-07-18
3396 o New directory servers:
3397 - tor26 has changed IP address.
3399 o Bugfixes on 0.1.0.x:
3400 - Fix a possible double-free in tor_gzip_uncompress().
3401 - When --disable-threads is set, do not search for or link against
3403 - Don't trigger an assert if an authoritative directory server
3404 claims its dirport is 0.
3405 - Fix bug with removing Tor as an NT service: some people were
3406 getting "The service did not return an error." Thanks to Matt
3410 Changes in version 0.1.1.2-alpha - 2005-07-15
3411 o New directory servers:
3412 - tor26 has changed IP address.
3414 o Bugfixes on 0.1.0.x, crashes/leaks:
3415 - Port the servers-not-obeying-their-exit-policies fix from
3417 - Fix an fd leak in start_daemon().
3418 - On Windows, you can't always reopen a port right after you've
3419 closed it. So change retry_listeners() to only close and re-open
3420 ports that have changed.
3421 - Fix a possible double-free in tor_gzip_uncompress().
3423 o Bugfixes on 0.1.0.x, usability:
3424 - When tor_socketpair() fails in Windows, give a reasonable
3425 Windows-style errno back.
3426 - Let people type "tor --install" as well as "tor -install" when
3428 want to make it an NT service.
3429 - NT service patch from Matt Edman to improve error messages.
3430 - When the controller asks for a config option with an abbreviated
3431 name, give the full name in our response.
3432 - Correct the man page entry on TrackHostExitsExpire.
3433 - Looks like we were never delivering deflated (i.e. compressed)
3434 running-routers lists, even when asked. Oops.
3435 - When --disable-threads is set, do not search for or link against
3438 o Bugfixes on 0.1.1.x:
3439 - Fix a seg fault with autodetecting which controller version is
3443 - New hidden service descriptor format: put a version in it, and
3444 let people specify introduction/rendezvous points that aren't
3445 in "the directory" (which is subjective anyway).
3446 - Allow the DEBUG controller event to work again. Mark certain log
3447 entries as "don't tell this to controllers", so we avoid cycles.
3450 Changes in version 0.1.0.11 - 2005-06-30
3451 o Bugfixes on 0.1.0.x:
3452 - Fix major security bug: servers were disregarding their
3453 exit policies if clients behaved unexpectedly.
3454 - Make OS X init script check for missing argument, so we don't
3455 confuse users who invoke it incorrectly.
3456 - Fix a seg fault in "tor --hash-password foo".
3457 - The MAPADDRESS control command was broken.
3460 Changes in version 0.1.1.1-alpha - 2005-06-29
3462 - Make OS X init script check for missing argument, so we don't
3463 confuse users who invoke it incorrectly.
3464 - Fix a seg fault in "tor --hash-password foo".
3465 - Fix a possible way to DoS dirservers.
3466 - When we complain that your exit policy implicitly allows local or
3467 private address spaces, name them explicitly so operators can
3469 - Make the log message less scary when all the dirservers are
3470 temporarily unreachable.
3471 - We were printing the number of idle dns workers incorrectly when
3475 - Revised controller protocol (version 1) that uses ascii rather
3476 than binary. Add supporting libraries in python and java so you
3477 can use the controller from your applications without caring how
3479 - Spiffy new support for crypto hardware accelerators. Can somebody
3483 Changes in version 0.0.9.10 - 2005-06-16
3484 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
3485 - Refuse relay cells that claim to have a length larger than the
3486 maximum allowed. This prevents a potential attack that could read
3487 arbitrary memory (e.g. keys) from an exit server's process
3491 Changes in version 0.1.0.10 - 2005-06-14
3492 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
3493 libevent before 1.1a.
3496 Changes in version 0.1.0.9-rc - 2005-06-09
3498 - Reset buf->highwater every time buf_shrink() is called, not just on
3499 a successful shrink. This was causing significant memory bloat.
3500 - Fix buffer overflow when checking hashed passwords.
3501 - Security fix: if seeding the RNG on Win32 fails, quit.
3502 - Allow seeding the RNG on Win32 even when you're not running as
3504 - Disable threading on Solaris too. Something is wonky with it,
3505 cpuworkers, and reentrant libs.
3506 - Reenable the part of the code that tries to flush as soon as an
3507 OR outbuf has a full TLS record available. Perhaps this will make
3508 OR outbufs not grow as huge except in rare cases, thus saving lots
3509 of CPU time plus memory.
3510 - Reject malformed .onion addresses rather then passing them on as
3511 normal web requests.
3512 - Adapt patch from Adam Langley: fix possible memory leak in
3513 tor_lookup_hostname().
3514 - Initialize libevent later in the startup process, so the logs are
3515 already established by the time we start logging libevent warns.
3516 - Use correct errno on win32 if libevent fails.
3517 - Check and warn about known-bad/slow libevent versions.
3518 - Pay more attention to the ClientOnly config option.
3519 - Have torctl.in/tor.sh.in check for location of su binary (needed
3521 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
3522 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
3523 HttpProxyAuthenticator
3524 - Stop warning about sigpipes in the logs. We're going to
3525 pretend that getting these occassionally is normal and fine.
3526 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
3528 installer screens; and don't put stuff into StartupItems unless
3529 the user asks you to.
3530 - Require servers that use the default dirservers to have public IP
3531 addresses. We have too many servers that are configured with private
3532 IPs and their admins never notice the log entries complaining that
3533 their descriptors are being rejected.
3534 - Add OSX uninstall instructions. An actual uninstall script will
3538 Changes in version 0.1.0.8-rc - 2005-05-23
3540 - It turns out that kqueue on OS X 10.3.9 was causing kernel
3541 panics. Disable kqueue on all OS X Tors.
3542 - Fix RPM: remove duplicate line accidentally added to the rpm
3544 - Disable threads on openbsd too, since its gethostaddr is not
3546 - Tolerate libevent 0.8 since it still works, even though it's
3548 - Enable building on Red Hat 9.0 again.
3549 - Allow the middle hop of the testing circuit to be running any
3550 version, now that most of them have the bugfix to let them connect
3551 to unknown servers. This will allow reachability testing to work
3552 even when 0.0.9.7-0.0.9.9 become obsolete.
3553 - Handle relay cells with rh.length too large. This prevents
3554 a potential attack that could read arbitrary memory (maybe even
3555 keys) from the exit server's process.
3556 - We screwed up the dirport reachability testing when we don't yet
3557 have a cached version of the directory. Hopefully now fixed.
3558 - Clean up router_load_single_router() (used by the controller),
3559 so it doesn't seg fault on error.
3560 - Fix a minor memory leak when somebody establishes an introduction
3561 point at your Tor server.
3562 - If a socks connection ends because read fails, don't warn that
3563 you're not sending a socks reply back.
3566 - Add HttpProxyAuthenticator config option too, that works like
3567 the HttpsProxyAuthenticator config option.
3568 - Encode hashed controller passwords in hex instead of base64,
3569 to make it easier to write controllers.
3572 Changes in version 0.1.0.7-rc - 2005-05-17
3574 - Fix a bug in the OS X package installer that prevented it from
3575 installing on Tiger.
3576 - Fix a script bug in the OS X package installer that made it
3577 complain during installation.
3578 - Find libevent even if it's hiding in /usr/local/ and your
3579 CFLAGS and LDFLAGS don't tell you to look there.
3580 - Be able to link with libevent as a shared library (the default
3581 after 1.0d), even if it's hiding in /usr/local/lib and even
3582 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
3583 assuming you're running gcc. Otherwise fail and give a useful
3585 - Fix a bug in the RPM packager: set home directory for _tor to
3586 something more reasonable when first installing.
3587 - Free a minor amount of memory that is still reachable on exit.
3590 Changes in version 0.1.0.6-rc - 2005-05-14
3592 - Implement --disable-threads configure option. Disable threads on
3593 netbsd by default, because it appears to have no reentrant resolver
3595 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
3596 release (1.1) detects and disables kqueue if it's broken.
3597 - Append default exit policy before checking for implicit internal
3598 addresses. Now we don't log a bunch of complaints on startup
3599 when using the default exit policy.
3600 - Some people were putting "Address " in their torrc, and they had
3601 a buggy resolver that resolved " " to 0.0.0.0. Oops.
3602 - If DataDir is ~/.tor, and that expands to /.tor, then default to
3603 LOCALSTATEDIR/tor instead.
3604 - Fix fragmented-message bug in TorControl.py.
3605 - Resolve a minor bug which would prevent unreachable dirports
3606 from getting suppressed in the published descriptor.
3607 - When the controller gave us a new descriptor, we weren't resolving
3608 it immediately, so Tor would think its address was 0.0.0.0 until
3609 we fetched a new directory.
3610 - Fix an uppercase/lowercase case error in suppressing a bogus
3611 libevent warning on some Linuxes.
3614 - Begin scrubbing sensitive strings from logs by default. Turn off
3615 the config option SafeLogging if you need to do debugging.
3616 - Switch to a new buffer management algorithm, which tries to avoid
3617 reallocing and copying quite as much. In first tests it looks like
3618 it uses *more* memory on average, but less cpu.
3619 - First cut at support for "create-fast" cells. Clients can use
3620 these when extending to their first hop, since the TLS already
3621 provides forward secrecy and authentication. Not enabled on
3623 - When dirservers refuse a router descriptor, we now log its
3624 contactinfo, platform, and the poster's IP address.
3625 - Call tor_free_all instead of connections_free_all after forking, to
3626 save memory on systems that need to fork.
3627 - Whine at you if you're a server and you don't set your contactinfo.
3628 - Implement --verify-config command-line option to check if your torrc
3629 is valid without actually launching Tor.
3630 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
3631 rather than just rejecting it.
3634 Changes in version 0.1.0.5-rc - 2005-04-27
3636 - Stop trying to print a null pointer if an OR conn fails because
3637 we didn't like its cert.
3639 - Switch our internal buffers implementation to use a ring buffer,
3640 to hopefully improve performance for fast servers a lot.
3641 - Add HttpsProxyAuthenticator support (basic auth only), based
3642 on patch from Adam Langley.
3643 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
3644 the fast servers that have been joining lately.
3645 - Give hidden service accesses extra time on the first attempt,
3646 since 60 seconds is often only barely enough. This might improve
3648 - Improve performance for dirservers: stop re-parsing the whole
3649 directory every time you regenerate it.
3650 - Add more debugging info to help us find the weird dns freebsd
3651 pthreads bug; cleaner debug messages to help track future issues.
3654 Changes in version 0.0.9.9 - 2005-04-23
3655 o Bugfixes on 0.0.9.x:
3656 - If unofficial Tor clients connect and send weird TLS certs, our
3657 Tor server triggers an assert. This release contains a minimal
3658 backport from the broader fix that we put into 0.1.0.4-rc.
3661 Changes in version 0.1.0.4-rc - 2005-04-23
3663 - If unofficial Tor clients connect and send weird TLS certs, our
3664 Tor server triggers an assert. Stop asserting, and start handling
3665 TLS errors better in other situations too.
3666 - When the controller asks us to tell it about all the debug-level
3667 logs, it turns out we were generating debug-level logs while
3668 telling it about them, which turns into a bad loop. Now keep
3669 track of whether you're sending a debug log to the controller,
3670 and don't log when you are.
3671 - Fix the "postdescriptor" feature of the controller interface: on
3672 non-complete success, only say "done" once.
3674 - Clients are now willing to load balance over up to 2mB, not 1mB,
3675 of advertised bandwidth capacity.
3676 - Add a NoPublish config option, so you can be a server (e.g. for
3677 testing running Tor servers in other Tor networks) without
3678 publishing your descriptor to the primary dirservers.
3681 Changes in version 0.1.0.3-rc - 2005-04-08
3682 o Improvements on 0.1.0.2-rc:
3683 - Client now retries when streams end early for 'hibernating' or
3684 'resource limit' reasons, rather than failing them.
3685 - More automated handling for dirserver operators:
3686 - Automatically approve nodes running 0.1.0.2-rc or later,
3687 now that the the reachability detection stuff is working.
3688 - Now we allow two unverified servers with the same nickname
3689 but different keys. But if a nickname is verified, only that
3690 nickname+key are allowed.
3691 - If you're an authdirserver connecting to an address:port,
3692 and it's not the OR you were expecting, forget about that
3693 descriptor. If he *was* the one you were expecting, then forget
3694 about all other descriptors for that address:port.
3695 - Allow servers to publish descriptors from 12 hours in the future.
3696 Corollary: only whine about clock skew from the dirserver if
3697 he's a trusted dirserver (since now even verified servers could
3698 have quite wrong clocks).
3699 - Adjust maximum skew and age for rendezvous descriptors: let skew
3700 be 48 hours rather than 90 minutes.
3701 - Efficiency improvements:
3702 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
3703 it much faster to look up a circuit for each relay cell.
3704 - Remove most calls to assert_all_pending_dns_resolves_ok(),
3705 since they're eating our cpu on exit nodes.
3706 - Stop wasting time doing a case insensitive comparison for every
3707 dns name every time we do any lookup. Canonicalize the names to
3708 lowercase and be done with it.
3709 - Start sending 'truncated' cells back rather than destroy cells,
3710 if the circuit closes in front of you. This means we won't have
3711 to abandon partially built circuits.
3712 - Only warn once per nickname from add_nickname_list_to_smartlist
3713 per failure, so an entrynode or exitnode choice that's down won't
3715 - Put a note in the torrc about abuse potential with the default
3717 - Revise control spec and implementation to allow all log messages to
3718 be sent to controller with their severities intact (suggested by
3719 Matt Edman). Update TorControl to handle new log event types.
3720 - Provide better explanation messages when controller's POSTDESCRIPTOR
3722 - Stop putting nodename in the Platform string in server descriptors.
3723 It doesn't actually help, and it is confusing/upsetting some people.
3725 o Bugfixes on 0.1.0.2-rc:
3726 - We were printing the host mask wrong in exit policies in server
3727 descriptors. This isn't a critical bug though, since we were still
3728 obeying the exit policy internally.
3729 - Fix Tor when compiled with libevent but without pthreads: move
3730 connection_unregister() from _connection_free() to
3732 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
3733 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
3734 when we look through the connection array, we'll find any of the
3735 cpu/dnsworkers. This is no good.
3737 o Bugfixes on 0.0.9.8:
3738 - Fix possible bug on threading platforms (e.g. win32) which was
3739 leaking a file descriptor whenever a cpuworker or dnsworker died.
3740 - When using preferred entry or exit nodes, ignore whether the
3741 circuit wants uptime or capacity. They asked for the nodes, they
3743 - chdir() to your datadirectory at the *end* of the daemonize process,
3744 not the beginning. This was a problem because the first time you
3745 run tor, if your datadir isn't there, and you have runasdaemon set
3746 to 1, it will try to chdir to it before it tries to create it. Oops.
3747 - Handle changed router status correctly when dirserver reloads
3748 fingerprint file. We used to be dropping all unverified descriptors
3749 right then. The bug was hidden because we would immediately
3750 fetch a directory from another dirserver, which would include the
3751 descriptors we just dropped.
3752 - When we're connecting to an OR and he's got a different nickname/key
3753 than we were expecting, only complain loudly if we're an OP or a
3754 dirserver. Complaining loudly to the OR admins just confuses them.
3755 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
3756 artificially capped at 500kB.
3759 Changes in version 0.0.9.8 - 2005-04-07
3760 o Bugfixes on 0.0.9.x:
3761 - We have a bug that I haven't found yet. Sometimes, very rarely,
3762 cpuworkers get stuck in the 'busy' state, even though the cpuworker
3763 thinks of itself as idle. This meant that no new circuits ever got
3764 established. Here's a workaround to kill any cpuworker that's been
3765 busy for more than 100 seconds.
3768 Changes in version 0.1.0.2-rc - 2005-04-01
3769 o Bugfixes on 0.1.0.1-rc:
3770 - Fixes on reachability detection:
3771 - Don't check for reachability while hibernating.
3772 - If ORPort is reachable but DirPort isn't, still publish the
3773 descriptor, but zero out DirPort until it's found reachable.
3774 - When building testing circs for ORPort testing, use only
3775 high-bandwidth nodes, so fewer circuits fail.
3776 - Complain about unreachable ORPort separately from unreachable
3777 DirPort, so the user knows what's going on.
3778 - Make sure we only conclude ORPort reachability if we didn't
3779 initiate the conn. Otherwise we could falsely conclude that
3780 we're reachable just because we connected to the guy earlier
3781 and he used that same pipe to extend to us.
3782 - Authdirservers shouldn't do ORPort reachability detection,
3783 since they're in clique mode, so it will be rare to find a
3784 server not already connected to them.
3785 - When building testing circuits, always pick middle hops running
3786 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
3787 bug. (This is a kludge; it will go away when 0.0.9.x becomes
3789 - When we decide we're reachable, actually publish our descriptor
3791 - Fix bug in redirectstream in the controller.
3792 - Fix the state descriptor strings so logs don't claim edge streams
3793 are in a different state than they actually are.
3794 - Use recent libevent features when possible (this only really affects
3795 win32 and osx right now, because the new libevent with these
3796 features hasn't been released yet). Add code to suppress spurious
3798 - Prevent possible segfault in connection_close_unattached_ap().
3799 - Fix newlines on torrc in win32.
3800 - Improve error msgs when tor-resolve fails.
3802 o Improvements on 0.0.9.x:
3803 - New experimental script tor/contrib/ExerciseServer.py (needs more
3804 work) that uses the controller interface to build circuits and
3805 fetch pages over them. This will help us bootstrap servers that
3806 have lots of capacity but haven't noticed it yet.
3807 - New experimental script tor/contrib/PathDemo.py (needs more work)
3808 that uses the controller interface to let you choose whole paths
3810 "<hostname>.<path,separated by dots>.<length of path>.path"
3811 - When we've connected to an OR and handshaked but didn't like
3812 the result, we were closing the conn without sending destroy
3813 cells back for pending circuits. Now send those destroys.
3816 Changes in version 0.0.9.7 - 2005-04-01
3817 o Bugfixes on 0.0.9.x:
3818 - Fix another race crash bug (thanks to Glenn Fink for reporting).
3819 - Compare identity to identity, not to nickname, when extending to
3820 a router not already in the directory. This was preventing us from
3821 extending to unknown routers. Oops.
3822 - Make sure to create OS X Tor user in <500 range, so we aren't
3823 creating actual system users.
3824 - Note where connection-that-hasn't-sent-end was marked, and fix
3825 a few really loud instances of this harmless bug (it's fixed more
3829 Changes in version 0.1.0.1-rc - 2005-03-28
3831 - Add reachability testing. Your Tor server will automatically try
3832 to see if its ORPort and DirPort are reachable from the outside,
3833 and it won't upload its descriptor until it decides they are.
3834 - Handle unavailable hidden services better. Handle slow or busy
3835 hidden services better.
3836 - Add support for CONNECTing through https proxies, with "HttpsProxy"
3838 - New exit policy: accept most low-numbered ports, rather than
3839 rejecting most low-numbered ports.
3840 - More Tor controller support (still experimental). See
3841 http://tor.eff.org/doc/control-spec.txt for all the new features,
3842 including signals to emulate unix signals from any platform;
3843 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
3844 closestream; closecircuit; etc.
3845 - Make nt services work and start on startup on win32 (based on
3846 patch by Matt Edman).
3847 - Add a new AddressMap config directive to rewrite incoming socks
3848 addresses. This lets you, for example, declare an implicit
3849 required exit node for certain sites.
3850 - Add a new TrackHostExits config directive to trigger addressmaps
3851 for certain incoming socks addresses -- for sites that break when
3852 your exit keeps changing (based on patch by Mike Perry).
3853 - Redo the client-side dns cache so it's just an addressmap too.
3854 - Notice when our IP changes, and reset stats/uptime/reachability.
3855 - When an application is using socks5, give him the whole variety of
3856 potential socks5 responses (connect refused, host unreachable, etc),
3857 rather than just "success" or "failure".
3858 - A more sane version numbering system. See
3859 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
3860 - New contributed script "exitlist": a simple python script to
3861 parse directories and find Tor nodes that exit to listed
3863 - New contributed script "privoxy-tor-toggle" to toggle whether
3864 Privoxy uses Tor. Seems to be configured for Debian by default.
3865 - Report HTTP reasons to client when getting a response from directory
3866 servers -- so you can actually know what went wrong.
3867 - New config option MaxAdvertisedBandwidth which lets you advertise
3868 a low bandwidthrate (to not attract as many circuits) while still
3869 allowing a higher bandwidthrate in reality.
3871 o Robustness/stability fixes:
3872 - Make Tor use Niels Provos's libevent instead of its current
3873 poll-but-sometimes-select mess. This will let us use faster async
3874 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
3876 - pthread support now too. This was forced because when we forked,
3877 we ended up wasting a lot of duplicate ram over time. Also switch
3878 to foo_r versions of some library calls to allow reentry and
3880 - Better handling for heterogeneous / unreliable nodes:
3881 - Annotate circuits w/ whether they aim to contain high uptime nodes
3882 and/or high capacity nodes. When building circuits, choose
3884 - This means that every single node in an intro rend circuit,
3885 not just the last one, will have a minimum uptime.
3886 - New config option LongLivedPorts to indicate application streams
3887 that will want high uptime circuits.
3888 - Servers reset uptime when a dir fetch entirely fails. This
3889 hopefully reflects stability of the server's network connectivity.
3890 - If somebody starts his tor server in Jan 2004 and then fixes his
3891 clock, don't make his published uptime be a year.
3892 - Reset published uptime when you wake up from hibernation.
3893 - Introduce a notion of 'internal' circs, which are chosen without
3894 regard to the exit policy of the last hop. Intro and rendezvous
3895 circs must be internal circs, to avoid leaking information. Resolve
3896 and connect streams can use internal circs if they want.
3897 - New circuit pooling algorithm: make sure to have enough circs around
3898 to satisfy any predicted ports, and also make sure to have 2 internal
3899 circs around if we've required internal circs lately (and with high
3900 uptime if we've seen that lately too).
3901 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
3902 which describes how often we retry making new circuits if current
3903 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
3904 how long we're willing to make use of an already-dirty circuit.
3905 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
3906 circ as necessary, if there are any completed ones lying around
3907 when we try to launch one.
3908 - Make hidden services try to establish a rendezvous for 30 seconds,
3909 rather than for n (where n=3) attempts to build a circuit.
3910 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
3911 "ShutdownWaitLength".
3912 - Try to be more zealous about calling connection_edge_end when
3913 things go bad with edge conns in connection.c.
3914 - Revise tor-spec to add more/better stream end reasons.
3915 - Revise all calls to connection_edge_end to avoid sending "misc",
3916 and to take errno into account where possible.
3919 - Fix a race condition that can trigger an assert, when we have a
3920 pending create cell and an OR connection fails right then.
3921 - Fix several double-mark-for-close bugs, e.g. where we were finding
3922 a conn for a cell even if that conn is already marked for close.
3923 - Make sequence of log messages when starting on win32 with no config
3924 file more reasonable.
3925 - When choosing an exit node for a new non-internal circ, don't take
3926 into account whether it'll be useful for any pending x.onion
3927 addresses -- it won't.
3928 - Turn addr_policy_compare from a tristate to a quadstate; this should
3929 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
3930 for google.com" problem.
3931 - Make "platform" string in descriptor more accurate for Win32 servers,
3932 so it's not just "unknown platform".
3933 - Fix an edge case in parsing config options (thanks weasel).
3934 If they say "--" on the commandline, it's not an option.
3935 - Reject odd-looking addresses at the client (e.g. addresses that
3936 contain a colon), rather than having the server drop them because
3938 - tor-resolve requests were ignoring .exit if there was a working circuit
3939 they could use instead.
3940 - REUSEADDR on normal platforms means you can rebind to the port
3941 right after somebody else has let it go. But REUSEADDR on win32
3942 means to let you bind to the port _even when somebody else
3943 already has it bound_! So, don't do that on Win32.
3944 - Change version parsing logic: a version is "obsolete" if it is not
3945 recommended and (1) there is a newer recommended version in the
3946 same series, or (2) there are no recommended versions in the same
3947 series, but there are some recommended versions in a newer series.
3948 A version is "new" if it is newer than any recommended version in
3950 - Stop most cases of hanging up on a socks connection without sending
3954 - Require BandwidthRate to be at least 20kB/s for servers.
3955 - When a dirserver causes you to give a warn, mention which dirserver
3957 - New config option DirAllowPrivateAddresses for authdirservers.
3958 Now by default they refuse router descriptors that have non-IP or
3959 private-IP addresses.
3960 - Stop publishing socksport in the directory, since it's not
3961 actually meant to be public. For compatibility, publish a 0 there
3963 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
3964 smart" value, that is low for servers and high for clients.
3965 - If our clock jumps forward by 100 seconds or more, assume something
3966 has gone wrong with our network and abandon all not-yet-used circs.
3967 - Warn when exit policy implicitly allows local addresses.
3968 - If we get an incredibly skewed timestamp from a dirserver mirror
3969 that isn't a verified OR, don't warn -- it's probably him that's
3971 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
3972 cookies to disk and doesn't log each web request to disk. (Thanks
3973 to Brett Carrington for pointing this out.)
3974 - When a client asks us for a dir mirror and we don't have one,
3975 launch an attempt to get a fresh one.
3976 - If we're hibernating and we get a SIGINT, exit immediately.
3977 - Add --with-dmalloc ./configure option, to track memory leaks.
3978 - And try to free all memory on closing, so we can detect what
3980 - Cache local dns resolves correctly even when they're .exit
3982 - Give a better warning when some other server advertises an
3983 ORPort that is actually an apache running ssl.
3984 - Add "opt hibernating 1" to server descriptor to make it clearer
3985 whether the server is hibernating.
3988 Changes in version 0.0.9.6 - 2005-03-24
3989 o Bugfixes on 0.0.9.x (crashes and asserts):
3990 - Add new end stream reasons to maintainance branch. Fix bug where
3991 reason (8) could trigger an assert. Prevent bug from recurring.
3992 - Apparently win32 stat wants paths to not end with a slash.
3993 - Fix assert triggers in assert_cpath_layer_ok(), where we were
3994 blowing away the circuit that conn->cpath_layer points to, then
3995 checking to see if the circ is well-formed. Backport check to make
3996 sure we dont use the cpath on a closed connection.
3997 - Prevent circuit_resume_edge_reading_helper() from trying to package
3998 inbufs for marked-for-close streams.
3999 - Don't crash on hup if your options->address has become unresolvable.
4000 - Some systems (like OS X) sometimes accept() a connection and tell
4001 you the remote host is 0.0.0.0:0. If this happens, due to some
4002 other mis-features, we get confused; so refuse the conn for now.
4004 o Bugfixes on 0.0.9.x (other):
4005 - Fix harmless but scary "Unrecognized content encoding" warn message.
4006 - Add new stream error reason: TORPROTOCOL reason means "you are not
4007 speaking a version of Tor I understand; say bye-bye to your stream."
4008 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
4009 into the future, now that we are more tolerant of skew. This
4010 resolves a bug where a Tor server would refuse to cache a directory
4011 because all the directories it gets are too far in the future;
4012 yet the Tor server never logs any complaints about clock skew.
4013 - Mac packaging magic: make man pages useable, and do not overwrite
4014 existing torrc files.
4015 - Make OS X log happily to /var/log/tor/tor.log
4018 Changes in version 0.0.9.5 - 2005-02-22
4019 o Bugfixes on 0.0.9.x:
4020 - Fix an assert race at exit nodes when resolve requests fail.
4021 - Stop picking unverified dir mirrors--it only leads to misery.
4022 - Patch from Matt Edman to make NT services work better. Service
4023 support is still not compiled into the executable by default.
4024 - Patch from Dmitri Bely so the Tor service runs better under
4025 the win32 SYSTEM account.
4026 - Make tor-resolve actually work (?) on Win32.
4027 - Fix a sign bug when getrlimit claims to have 4+ billion
4028 file descriptors available.
4029 - Stop refusing to start when bandwidthburst == bandwidthrate.
4030 - When create cells have been on the onion queue more than five
4031 seconds, just send back a destroy and take them off the list.
4034 Changes in version 0.0.9.4 - 2005-02-03
4035 o Bugfixes on 0.0.9:
4036 - Fix an assert bug that took down most of our servers: when
4037 a server claims to have 1 GB of bandwidthburst, don't
4039 - Don't crash as badly if we have spawned the max allowed number
4040 of dnsworkers, or we're out of file descriptors.
4041 - Block more file-sharing ports in the default exit policy.
4042 - MaxConn is now automatically set to the hard limit of max
4043 file descriptors we're allowed (ulimit -n), minus a few for
4045 - Give a clearer message when servers need to raise their
4046 ulimit -n when they start running out of file descriptors.
4047 - SGI Compatibility patches from Jan Schaumann.
4048 - Tolerate a corrupt cached directory better.
4049 - When a dirserver hasn't approved your server, list which one.
4050 - Go into soft hibernation after 95% of the bandwidth is used,
4051 not 99%. This is especially important for daily hibernators who
4052 have a small accounting max. Hopefully it will result in fewer
4053 cut connections when the hard hibernation starts.
4054 - Load-balance better when using servers that claim more than
4055 800kB/s of capacity.
4056 - Make NT services work (experimental, only used if compiled in).
4059 Changes in version 0.0.9.3 - 2005-01-21
4060 o Bugfixes on 0.0.9:
4061 - Backport the cpu use fixes from main branch, so busy servers won't
4062 need as much processor time.
4063 - Work better when we go offline and then come back, or when we
4064 run Tor at boot before the network is up. We do this by
4065 optimistically trying to fetch a new directory whenever an
4066 application request comes in and we think we're offline -- the
4067 human is hopefully a good measure of when the network is back.
4068 - Backport some minimal hidserv bugfixes: keep rend circuits open as
4069 long as you keep using them; actually publish hidserv descriptors
4070 shortly after they change, rather than waiting 20-40 minutes.
4071 - Enable Mac startup script by default.
4072 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
4073 - When you update AllowUnverifiedNodes or FirewallPorts via the
4074 controller's setconf feature, we were always appending, never
4076 - When you update HiddenServiceDir via setconf, it was screwing up
4077 the order of reading the lines, making it fail.
4078 - Do not rewrite a cached directory back to the cache; otherwise we
4079 will think it is recent and not fetch a newer one on startup.
4080 - Workaround for webservers that lie about Content-Encoding: Tor
4081 now tries to autodetect compressed directories and compression
4082 itself. This lets us Proxypass dir fetches through apache.
4085 Changes in version 0.0.9.2 - 2005-01-04
4086 o Bugfixes on 0.0.9 (crashes and asserts):
4087 - Fix an assert on startup when the disk is full and you're logging
4089 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
4090 style address, then we'd crash.
4091 - Fix an assert trigger when the running-routers string we get from
4092 a dirserver is broken.
4093 - Make worker threads start and run on win32. Now win32 servers
4095 - Bandaid (not actually fix, but now it doesn't crash) an assert
4096 where the dns worker dies mysteriously and the main Tor process
4097 doesn't remember anything about the address it was resolving.
4099 o Bugfixes on 0.0.9 (Win32):
4100 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
4101 name out of the warning/assert messages.
4102 - Fix a superficial "unhandled error on read" bug on win32.
4103 - The win32 installer no longer requires a click-through for our
4104 license, since our Free Software license grants rights but does not
4106 - Win32: When connecting to a dirserver fails, try another one
4107 immediately. (This was already working for non-win32 Tors.)
4108 - Stop trying to parse $HOME on win32 when hunting for default
4110 - Make tor-resolve.c work on win32 by calling network_init().
4112 o Bugfixes on 0.0.9 (other):
4113 - Make 0.0.9.x build on Solaris again.
4114 - Due to a fencepost error, we were blowing away the \n when reporting
4115 confvalue items in the controller. So asking for multiple config
4116 values at once couldn't work.
4117 - When listing circuits that are pending on an opening OR connection,
4118 if we're an OR we were listing circuits that *end* at us as
4119 being pending on every listener, dns/cpu worker, etc. Stop that.
4120 - Dirservers were failing to create 'running-routers' or 'directory'
4121 strings if we had more than some threshold of routers. Fix them so
4122 they can handle any number of routers.
4123 - Fix a superficial "Duplicate mark for close" bug.
4124 - Stop checking for clock skew for OR connections, even for servers.
4125 - Fix a fencepost error that was chopping off the last letter of any
4126 nickname that is the maximum allowed nickname length.
4127 - Update URLs in log messages so they point to the new website.
4128 - Fix a potential problem in mangling server private keys while
4129 writing to disk (not triggered yet, as far as we know).
4130 - Include the licenses for other free software we include in Tor,
4131 now that we're shipping binary distributions more regularly.
4134 Changes in version 0.0.9.1 - 2004-12-15
4135 o Bugfixes on 0.0.9:
4136 - Make hibernation actually work.
4137 - Make HashedControlPassword config option work.
4138 - When we're reporting event circuit status to a controller,
4139 don't use the stream status code.
4142 Changes in version 0.0.9 - 2004-12-12
4144 - Clean up manpage and torrc.sample file.
4145 - Clean up severities and text of log warnings.
4147 - Make servers trigger an assert when they enter hibernation.
4150 Changes in version 0.0.9rc7 - 2004-12-08
4151 o Bugfixes on 0.0.9rc:
4152 - Fix a stack-trashing crash when an exit node begins hibernating.
4153 - Avoid looking at unallocated memory while considering which
4154 ports we need to build circuits to cover.
4155 - Stop a sigpipe: when an 'end' cell races with eof from the app,
4156 we shouldn't hold-open-until-flush if the eof arrived first.
4157 - Fix a bug with init_cookie_authentication() in the controller.
4158 - When recommending new-format log lines, if the upper bound is
4159 LOG_ERR, leave it implicit.
4161 o Bugfixes on 0.0.8.1:
4162 - Fix a whole slew of memory leaks.
4163 - Fix isspace() and friends so they still make Solaris happy
4164 but also so they don't trigger asserts on win32.
4165 - Fix parse_iso_time on platforms without strptime (eg win32).
4166 - win32: tolerate extra "readable" events better.
4167 - win32: when being multithreaded, leave parent fdarray open.
4168 - Make unit tests work on win32.
4171 Changes in version 0.0.9rc6 - 2004-12-06
4172 o Bugfixes on 0.0.9pre:
4173 - Clean up some more integer underflow opportunities (not exploitable
4175 - While hibernating, hup should not regrow our listeners.
4176 - Send an end to the streams we close when we hibernate, rather
4177 than just chopping them off.
4178 - React to eof immediately on non-open edge connections.
4180 o Bugfixes on 0.0.8.1:
4181 - Calculate timeout for waiting for a connected cell from the time
4182 we sent the begin cell, not from the time the stream started. If
4183 it took a long time to establish the circuit, we would time out
4184 right after sending the begin cell.
4185 - Fix router_compare_addr_to_addr_policy: it was not treating a port
4186 of * as always matching, so we were picking reject *:* nodes as
4187 exit nodes too. Oops.
4190 - New circuit building strategy: keep a list of ports that we've
4191 used in the past 6 hours, and always try to have 2 circuits open
4192 or on the way that will handle each such port. Seed us with port
4193 80 so web users won't complain that Tor is "slow to start up".
4194 - Make kill -USR1 dump more useful stats about circuits.
4195 - When warning about retrying or giving up, print the address, so
4196 the user knows which one it's talking about.
4197 - If you haven't used a clean circuit in an hour, throw it away,
4198 just to be on the safe side. (This means after 6 hours a totally
4199 unused Tor client will have no circuits open.)
4202 Changes in version 0.0.9rc5 - 2004-12-01
4203 o Bugfixes on 0.0.8.1:
4204 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
4205 - Let resolve conns retry/expire also, rather than sticking around
4207 - If we are using select, make sure we stay within FD_SETSIZE.
4209 o Bugfixes on 0.0.9pre:
4210 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
4211 but doesn't seem to be currently; thanks to Ilja van Sprundel for
4213 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
4214 instead. Impose minima and maxima for all *Period options; impose
4215 even tighter maxima for fetching if we are a caching dirserver.
4216 Clip rather than rejecting.
4217 - Fetch cached running-routers from servers that serve it (that is,
4218 authdirservers and servers running 0.0.9rc5-cvs or later.)
4221 - Accept *:706 (silc) in default exit policy.
4222 - Implement new versioning format for post 0.1.
4223 - Support "foo.nickname.exit" addresses, to let Alice request the
4224 address "foo" as viewed by exit node "nickname". Based on a patch
4226 - Make tor --version --version dump the cvs Id of every file.
4229 Changes in version 0.0.9rc4 - 2004-11-28
4230 o Bugfixes on 0.0.8.1:
4231 - Make windows sockets actually non-blocking (oops), and handle
4232 win32 socket errors better.
4234 o Bugfixes on 0.0.9rc1:
4235 - Actually catch the -USR2 signal.
4238 Changes in version 0.0.9rc3 - 2004-11-25
4239 o Bugfixes on 0.0.8.1:
4240 - Flush the log file descriptor after we print "Tor opening log file",
4241 so we don't see those messages days later.
4243 o Bugfixes on 0.0.9rc1:
4244 - Make tor-resolve work again.
4245 - Avoid infinite loop in tor-resolve if tor hangs up on it.
4246 - Fix an assert trigger for clients/servers handling resolves.
4249 Changes in version 0.0.9rc2 - 2004-11-24
4250 o Bugfixes on 0.0.9rc1:
4251 - I broke socks5 support while fixing the eof bug.
4252 - Allow unitless bandwidths and intervals; they default to bytes
4254 - New servers don't start out hibernating; they are active until
4255 they run out of bytes, so they have a better estimate of how
4256 long it takes, and so their operators can know they're working.
4259 Changes in version 0.0.9rc1 - 2004-11-23
4260 o Bugfixes on 0.0.8.1:
4261 - Finally fix a bug that's been plaguing us for a year:
4262 With high load, circuit package window was reaching 0. Whenever
4263 we got a circuit-level sendme, we were reading a lot on each
4264 socket, but only writing out a bit. So we would eventually reach
4265 eof. This would be noticed and acted on even when there were still
4266 bytes sitting in the inbuf.
4267 - When poll() is interrupted, we shouldn't believe the revents values.
4269 o Bugfixes on 0.0.9pre6:
4270 - Fix hibernate bug that caused pre6 to be broken.
4271 - Don't keep rephist info for routers that haven't had activity for
4272 24 hours. (This matters now that clients have keys, since we track
4274 - Never call close_temp_logs while validating log options.
4275 - Fix backslash-escaping on tor.sh.in and torctl.in.
4278 - Implement weekly/monthly/daily accounting: now you specify your
4279 hibernation properties by
4280 AccountingMax N bytes|KB|MB|GB|TB
4281 AccountingStart day|week|month [day] HH:MM
4282 Defaults to "month 1 0:00".
4283 - Let bandwidth and interval config options be specified as 5 bytes,
4284 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
4285 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
4286 get back to normal.)
4287 - If your requested entry or exit node has advertised bandwidth 0,
4289 - Be more greedy about filling up relay cells -- we try reading again
4290 once we've processed the stuff we read, in case enough has arrived
4291 to fill the last cell completely.
4292 - Apply NT service patch from Osamu Fujino. Still needs more work.
4295 Changes in version 0.0.9pre6 - 2004-11-15
4296 o Bugfixes on 0.0.8.1:
4297 - Fix assert failure on malformed socks4a requests.
4298 - Use identity comparison, not nickname comparison, to choose which
4299 half of circuit-ID-space each side gets to use. This is needed
4300 because sometimes we think of a router as a nickname, and sometimes
4301 as a hex ID, and we can't predict what the other side will do.
4302 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
4303 write() call will fail and we handle it there.
4304 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
4305 and smartlist_len, which are two major profiling offenders.
4307 o Bugfixes on 0.0.9pre5:
4308 - Fix a bug in read_all that was corrupting config files on windows.
4309 - When we're raising the max number of open file descriptors to
4310 'unlimited', don't log that we just raised it to '-1'.
4311 - Include event code with events, as required by control-spec.txt.
4312 - Don't give a fingerprint when clients do --list-fingerprint:
4313 it's misleading, because it will never be the same again.
4314 - Stop using strlcpy in tor_strndup, since it was slowing us
4316 - Remove warn on startup about missing cached-directory file.
4317 - Make kill -USR1 work again.
4318 - Hibernate if we start tor during the "wait for wakeup-time" phase
4319 of an accounting interval. Log our hibernation plans better.
4320 - Authoritative dirservers now also cache their directory, so they
4321 have it on start-up.
4324 - Fetch running-routers; cache running-routers; compress
4325 running-routers; serve compressed running-routers.z
4326 - Add NSI installer script contributed by J Doe.
4327 - Commit VC6 and VC7 workspace/project files.
4328 - Commit a tor.spec for making RPM files, with help from jbash.
4329 - Add contrib/torctl.in contributed by Glenn Fink.
4330 - Implement the control-spec's SAVECONF command, to write your
4331 configuration to torrc.
4332 - Get cookie authentication for the controller closer to working.
4333 - Include control-spec.txt in the tarball.
4334 - When set_conf changes our server descriptor, upload a new copy.
4335 But don't upload it too often if there are frequent changes.
4336 - Document authentication config in man page, and document signals
4338 - Clean up confusing parts of man page and torrc.sample.
4339 - Make expand_filename handle ~ and ~username.
4340 - Use autoconf to enable largefile support where necessary. Use
4341 ftello where available, since ftell can fail at 2GB.
4342 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
4343 log more informatively.
4344 - Give a slightly more useful output for "tor -h".
4345 - Refuse application socks connections to port 0.
4346 - Check clock skew for verified servers, but allow unverified
4347 servers and clients to have any clock skew.
4348 - Break DirFetchPostPeriod into:
4349 - DirFetchPeriod for fetching full directory,
4350 - StatusFetchPeriod for fetching running-routers,
4351 - DirPostPeriod for posting server descriptor,
4352 - RendPostPeriod for posting hidden service descriptors.
4353 - Make sure the hidden service descriptors are at a random offset
4354 from each other, to hinder linkability.
4357 Changes in version 0.0.9pre5 - 2004-11-09
4358 o Bugfixes on 0.0.9pre4:
4359 - Fix a seg fault in unit tests (doesn't affect main program).
4360 - Fix an assert bug where a hidden service provider would fail if
4361 the first hop of his rendezvous circuit was down.
4362 - Hidden service operators now correctly handle version 1 style
4363 INTRODUCE1 cells (nobody generates them still, so not a critical
4365 - If do_hup fails, actually notice.
4366 - Handle more errnos from accept() without closing the listener.
4367 Some OpenBSD machines were closing their listeners because
4368 they ran out of file descriptors.
4369 - Send resolve cells to exit routers that are running a new
4370 enough version of the resolve code to work right.
4371 - Better handling of winsock includes on non-MSV win32 compilers.
4372 - Some people had wrapped their tor client/server in a script
4373 that would restart it whenever it died. This did not play well
4374 with our "shut down if your version is obsolete" code. Now people
4375 don't fetch a new directory if their local cached version is
4377 - Make our autogen.sh work on ksh as well as bash.
4380 - Hibernation: New config option "AccountingMaxKB" lets you
4381 set how many KBytes per month you want to allow your server to
4382 consume. Rather than spreading those bytes out evenly over the
4383 month, we instead hibernate for some of the month and pop up
4384 at a deterministic time, work until the bytes are consumed, then
4385 hibernate again. Config option "MonthlyAccountingStart" lets you
4386 specify which day of the month your billing cycle starts on.
4387 - Control interface: a separate program can now talk to your
4388 client/server over a socket, and get/set config options, receive
4389 notifications of circuits and streams starting/finishing/dying,
4390 bandwidth used, etc. The next step is to get some GUIs working.
4391 Let us know if you want to help out. See doc/control-spec.txt .
4392 - Ship a contrib/tor-control.py as an example script to interact
4393 with the control port.
4394 - "tor --hash-password zzyxz" will output a salted password for
4395 use in authenticating to the control interface.
4396 - New log format in config:
4397 "Log minsev[-maxsev] stdout|stderr|syslog" or
4398 "Log minsev[-maxsev] file /var/foo"
4401 - DirPolicy config option, to let people reject incoming addresses
4402 from their dirserver.
4403 - "tor --list-fingerprint" will list your identity key fingerprint
4405 - Add "pass" target for RedirectExit, to make it easier to break
4406 out of a sequence of RedirectExit rules.
4407 - Clients now generate a TLS cert too, in preparation for having
4408 them act more like real nodes.
4409 - Ship src/win32/ in the tarball, so people can use it to build.
4410 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
4412 - New "router-status" line in directory, to better bind each verified
4413 nickname to its identity key.
4414 - Deprecate unofficial config option abbreviations, and abbreviations
4415 not on the command line.
4416 - Add a pure-C tor-resolve implementation.
4417 - Use getrlimit and friends to ensure we can reach MaxConn (currently
4418 1024) file descriptors.
4420 o Code security improvements, inspired by Ilja:
4421 - Replace sprintf with snprintf. (I think they were all safe, but
4423 - Replace strcpy/strncpy with strlcpy in more places.
4424 - Avoid strcat; use snprintf or strlcat instead.
4425 - snprintf wrapper with consistent (though not C99) overflow behavior.
4428 Changes in version 0.0.9pre4 - 2004-10-17
4429 o Bugfixes on 0.0.9pre3:
4430 - If the server doesn't specify an exit policy, use the real default
4431 exit policy, not reject *:*.
4432 - Ignore fascistfirewall when uploading/downloading hidden service
4433 descriptors, since we go through Tor for those; and when using
4434 an HttpProxy, since we assume it can reach them all.
4435 - When looking for an authoritative dirserver, use only the ones
4436 configured at boot. Don't bother looking in the directory.
4437 - The rest of the fix for get_default_conf_file() on older win32.
4438 - Make 'Routerfile' config option obsolete.
4441 - New 'MyFamily nick1,...' config option for a server to
4442 specify other servers that shouldn't be used in the same circuit
4443 with it. Only believed if nick1 also specifies us.
4444 - New 'NodeFamily nick1,nick2,...' config option for a client to
4445 specify nodes that it doesn't want to use in the same circuit.
4446 - New 'Redirectexit pattern address:port' config option for a
4447 server to redirect exit connections, e.g. to a local squid.
4450 Changes in version 0.0.9pre3 - 2004-10-13
4451 o Bugfixes on 0.0.8.1:
4452 - Better torrc example lines for dirbindaddress and orbindaddress.
4453 - Improved bounds checking on parsed ints (e.g. config options and
4454 the ones we find in directories.)
4455 - Better handling of size_t vs int, so we're more robust on 64
4457 - Fix the rest of the bug where a newly started OR would appear
4458 as unverified even after we've added his fingerprint and hupped
4460 - Fix a bug from 0.0.7: when read() failed on a stream, we would
4461 close it without sending back an end. So 'connection refused'
4462 would simply be ignored and the user would get no response.
4464 o Bugfixes on 0.0.9pre2:
4465 - Serving the cached-on-disk directory to people is bad. We now
4466 provide no directory until we've fetched a fresh one.
4467 - Workaround for bug on windows where cached-directories get crlf
4469 - Make get_default_conf_file() work on older windows too.
4470 - If we write a *:* exit policy line in the descriptor, don't write
4471 any more exit policy lines.
4474 - Use only 0.0.9pre1 and later servers for resolve cells.
4475 - Make the dirservers file obsolete.
4476 - Include a dir-signing-key token in directories to tell the
4477 parsing entity which key is being used to sign.
4478 - Remove the built-in bulky default dirservers string.
4479 - New config option "Dirserver %s:%d [fingerprint]", which can be
4480 repeated as many times as needed. If no dirservers specified,
4481 default to moria1,moria2,tor26.
4482 - Make moria2 advertise a dirport of 80, so people behind firewalls
4483 will be able to get a directory.
4484 - Http proxy support
4485 - Dirservers translate requests for http://%s:%d/x to /x
4486 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
4487 be routed through this host.
4488 - Clients ask for /tor/x rather than /x for new enough dirservers.
4489 This way we can one day coexist peacefully with apache.
4490 - Clients specify a "Host: %s%d" http header, to be compatible
4491 with more proxies, and so running squid on an exit node can work.
4494 Changes in version 0.0.8.1 - 2004-10-13
4496 - Fix a seg fault that can be triggered remotely for Tor
4497 clients/servers with an open dirport.
4498 - Fix a rare assert trigger, where routerinfos for entries in
4499 our cpath would expire while we're building the path.
4500 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4501 - Fix a rare seg fault for people running hidden services on
4502 intermittent connections.
4503 - Fix a bug in parsing opt keywords with objects.
4504 - Fix a stale pointer assert bug when a stream detaches and
4506 - Fix a string format vulnerability (probably not exploitable)
4507 in reporting stats locally.
4508 - Fix an assert trigger: sometimes launching circuits can fail
4509 immediately, e.g. because too many circuits have failed recently.
4510 - Fix a compile warning on 64 bit platforms.
4513 Changes in version 0.0.9pre2 - 2004-10-03
4515 - Make fetching a cached directory work for 64-bit platforms too.
4516 - Make zlib.h a required header, not an optional header.
4519 Changes in version 0.0.9pre1 - 2004-10-01
4521 - Stop using separate defaults for no-config-file and
4522 empty-config-file. Now you have to explicitly turn off SocksPort,
4523 if you don't want it open.
4524 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4525 - Improve man page to mention more of the 0.0.8 features.
4526 - Fix a rare seg fault for people running hidden services on
4527 intermittent connections.
4528 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
4530 - Fix more dns related bugs: send back resolve_failed and end cells
4531 more reliably when the resolve fails, rather than closing the
4532 circuit and then trying to send the cell. Also attach dummy resolve
4533 connections to a circuit *before* calling dns_resolve(), to fix
4534 a bug where cached answers would never be sent in RESOLVED cells.
4535 - When we run out of disk space, or other log writing error, don't
4536 crash. Just stop logging to that log and continue.
4537 - We were starting to daemonize before we opened our logs, so if
4538 there were any problems opening logs, we would complain to stderr,
4539 which wouldn't work, and then mysteriously exit.
4540 - Fix a rare bug where sometimes a verified OR would connect to us
4541 before he'd uploaded his descriptor, which would cause us to
4542 assign conn->nickname as though he's unverified. Now we look through
4543 the fingerprint list to see if he's there.
4544 - Fix a rare assert trigger, where routerinfos for entries in
4545 our cpath would expire while we're building the path.
4548 - Clients can ask dirservers for /dir.z to get a compressed version
4549 of the directory. Only works for servers running 0.0.9, of course.
4550 - Make clients cache directories and use them to seed their router
4551 lists at startup. This means clients have a datadir again.
4552 - Configuration infrastructure support for warning on obsolete
4554 - Respond to content-encoding headers by trying to uncompress as
4556 - Reply with a deflated directory when a client asks for "dir.z".
4557 We could use allow-encodings instead, but allow-encodings isn't
4558 specified in HTTP 1.0.
4559 - Raise the max dns workers from 50 to 100.
4560 - Discourage people from setting their dirfetchpostperiod more often
4561 than once per minute.
4562 - Protect dirservers from overzealous descriptor uploading -- wait
4563 10 seconds after directory gets dirty, before regenerating.
4566 Changes in version 0.0.8 - 2004-08-25
4567 o Port it to SunOS 5.9 / Athena
4570 Changes in version 0.0.8rc2 - 2004-08-20
4571 o Make it compile on cygwin again.
4572 o When picking unverified routers, skip those with low uptime and/or
4573 low bandwidth, depending on what properties you care about.
4576 Changes in version 0.0.8rc1 - 2004-08-18
4577 o Changes from 0.0.7.3:
4579 - Fix assert triggers: if the other side returns an address 0.0.0.0,
4580 don't put it into the client dns cache.
4581 - If a begin failed due to exit policy, but we believe the IP address
4582 should have been allowed, switch that router to exitpolicy reject *:*
4583 until we get our next directory.
4585 - Clients choose nodes proportional to advertised bandwidth.
4586 - Avoid using nodes with low uptime as introduction points.
4587 - Handle servers with dynamic IP addresses: don't replace
4588 options->Address with the resolved one at startup, and
4589 detect our address right before we make a routerinfo each time.
4590 - 'FascistFirewall' option to pick dirservers and ORs on specific
4591 ports; plus 'FirewallPorts' config option to tell FascistFirewall
4592 which ports are open. (Defaults to 80,443)
4593 - Be more aggressive about trying to make circuits when the network
4594 has changed (e.g. when you unsuspend your laptop).
4595 - Check for time skew on http headers; report date in response to
4597 - If the entrynode config line has only one node, don't pick it as
4599 - Add strict{entry|exit}nodes config options. If set to 1, then
4600 we refuse to build circuits that don't include the specified entry
4602 - OutboundBindAddress config option, to bind to a specific
4603 IP address for outgoing connect()s.
4604 - End truncated log entries (e.g. directories) with "[truncated]".
4606 o Patches to 0.0.8preX:
4608 - Patches to compile and run on win32 again (maybe)?
4609 - Fix crash when looking for ~/.torrc with no $HOME set.
4610 - Fix a race bug in the unit tests.
4611 - Handle verified/unverified name collisions better when new
4612 routerinfo's arrive in a directory.
4613 - Sometimes routers were getting entered into the stats before
4614 we'd assigned their identity_digest. Oops.
4615 - Only pick and establish intro points after we've gotten a
4618 - AllowUnverifiedNodes config option to let circuits choose no-name
4619 routers in entry,middle,exit,introduction,rendezvous positions.
4620 Allow middle and rendezvous positions by default.
4621 - Add a man page for tor-resolve.
4624 Changes in version 0.0.7.3 - 2004-08-12
4625 o Stop dnsworkers from triggering an assert failure when you
4626 ask them to resolve the host "".
4629 Changes in version 0.0.8pre3 - 2004-08-09
4630 o Changes from 0.0.7.2:
4631 - Allow multiple ORs with same nickname in routerlist -- now when
4632 people give us one identity key for a nickname, then later
4633 another, we don't constantly complain until the first expires.
4634 - Remember used bandwidth (both in and out), and publish 15-minute
4635 snapshots for the past day into our descriptor.
4636 - You can now fetch $DIRURL/running-routers to get just the
4637 running-routers line, not the whole descriptor list. (But
4638 clients don't use this yet.)
4639 - When people mistakenly use Tor as an http proxy, point them
4640 at the tor-doc.html rather than the INSTALL.
4641 - Remove our mostly unused -- and broken -- hex_encode()
4642 function. Use base16_encode() instead. (Thanks to Timo Lindfors
4643 for pointing out this bug.)
4644 - Rotate onion keys every 12 hours, not every 2 hours, so we have
4645 fewer problems with people using the wrong key.
4646 - Change the default exit policy to reject the default edonkey,
4647 kazaa, gnutella ports.
4648 - Add replace_file() to util.[ch] to handle win32's rename().
4650 o Changes from 0.0.8preX:
4651 - Fix two bugs in saving onion keys to disk when rotating, so
4652 hopefully we'll get fewer people using old onion keys.
4653 - Fix an assert error that was making SocksPolicy not work.
4654 - Be willing to expire routers that have an open dirport -- it's
4655 just the authoritative dirservers we want to not forget.
4656 - Reject tor-resolve requests for .onion addresses early, so we
4657 don't build a whole rendezvous circuit and then fail.
4658 - When you're warning a server that he's unverified, don't cry
4660 - Fix a race condition: don't try to extend onto a connection
4661 that's still handshaking.
4662 - For servers in clique mode, require the conn to be open before
4663 you'll choose it for your path.
4664 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
4665 end relay cell, etc.
4666 - Measure bandwidth capacity over the last 24 hours, not just 12
4667 - Bugfix: authoritative dirservers were making and signing a new
4668 directory for each client, rather than reusing the cached one.
4671 Changes in version 0.0.8pre2 - 2004-08-04
4672 o Changes from 0.0.7.2:
4674 - Check directory signature _before_ you decide whether you're
4675 you're running an obsolete version and should exit.
4676 - Check directory signature _before_ you parse the running-routers
4677 list to decide who's running or verified.
4678 - Bugfixes and features:
4679 - Check return value of fclose while writing to disk, so we don't
4680 end up with broken files when servers run out of disk space.
4681 - Log a warning if the user uses an unsafe socks variant, so people
4682 are more likely to learn about privoxy or socat.
4683 - Dirservers now include RFC1123-style dates in the HTTP headers,
4684 which one day we will use to better detect clock skew.
4686 o Changes from 0.0.8pre1:
4687 - Make it compile without warnings again on win32.
4688 - Log a warning if you're running an unverified server, to let you
4689 know you might want to get it verified.
4690 - Only pick a default nickname if you plan to be a server.
4693 Changes in version 0.0.8pre1 - 2004-07-23
4695 - Made our unit tests compile again on OpenBSD 3.5, and tor
4696 itself compile again on OpenBSD on a sparc64.
4697 - We were neglecting milliseconds when logging on win32, so
4698 everything appeared to happen at the beginning of each second.
4701 - 'Extend' relay cell payloads now include the digest of the
4702 intended next hop's identity key. Now we can verify that we're
4703 extending to the right router, and also extend to routers we
4704 hadn't heard of before.
4707 - Tor nodes can now act as relays (with an advertised ORPort)
4708 without being manually verified by the dirserver operators.
4709 - Uploaded descriptors of unverified routers are now accepted
4710 by the dirservers, and included in the directory.
4711 - Verified routers are listed by nickname in the running-routers
4712 list; unverified routers are listed as "$<fingerprint>".
4713 - We now use hash-of-identity-key in most places rather than
4714 nickname or addr:port, for improved security/flexibility.
4715 - To avoid Sybil attacks, paths still use only verified servers.
4716 But now we have a chance to play around with hybrid approaches.
4717 - Nodes track bandwidth usage to estimate capacity (not used yet).
4718 - ClientOnly option for nodes that never want to become servers.
4719 - Directory caching.
4720 - "AuthoritativeDir 1" option for the official dirservers.
4721 - Now other nodes (clients and servers) will cache the latest
4722 directory they've pulled down.
4723 - They can enable their DirPort to serve it to others.
4724 - Clients will pull down a directory from any node with an open
4725 DirPort, and check the signature/timestamp correctly.
4726 - Authoritative dirservers now fetch directories from other
4727 authdirservers, to stay better synced.
4728 - Running-routers list tells who's down also, along with noting
4729 if they're verified (listed by nickname) or unverified (listed
4731 - Allow dirservers to serve running-router list separately.
4732 This isn't used yet.
4733 - ORs connect-on-demand to other ORs
4734 - If you get an extend cell to an OR you're not connected to,
4735 connect, handshake, and forward the create cell.
4736 - The authoritative dirservers stay connected to everybody,
4737 and everybody stays connected to 0.0.7 servers, but otherwise
4738 clients/servers expire unused connections after 5 minutes.
4739 - When servers get a sigint, they delay 30 seconds (refusing new
4740 connections) then exit. A second sigint causes immediate exit.
4741 - File and name management:
4742 - Look for .torrc if no CONFDIR "torrc" is found.
4743 - If no datadir is defined, then choose, make, and secure ~/.tor
4745 - If torrc not found, exitpolicy reject *:*.
4746 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
4747 - If no nickname is defined, derive default from hostname.
4748 - Rename secret key files, e.g. identity.key -> secret_id_key,
4749 to discourage people from mailing their identity key to tor-ops.
4750 - Refuse to build a circuit before the directory has arrived --
4751 it won't work anyway, since you won't know the right onion keys
4753 - Try other dirservers immediately if the one you try is down. This
4754 should tolerate down dirservers better now.
4755 - Parse tor version numbers so we can do an is-newer-than check
4756 rather than an is-in-the-list check.
4757 - New socks command 'resolve', to let us shim gethostbyname()
4759 - A 'tor_resolve' script to access the socks resolve functionality.
4760 - A new socks-extensions.txt doc file to describe our
4761 interpretation and extensions to the socks protocols.
4762 - Add a ContactInfo option, which gets published in descriptor.
4763 - Publish OR uptime in descriptor (and thus in directory) too.
4764 - Write tor version at the top of each log file
4765 - New docs in the tarball:
4767 - Document that you should proxy your SSL traffic too.
4770 Changes in version 0.0.7.2 - 2004-07-07
4771 o A better fix for the 0.0.0.0 problem, that will hopefully
4772 eliminate the remaining related assertion failures.
4775 Changes in version 0.0.7.1 - 2004-07-04
4776 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
4777 since internally we use 0.0.0.0 to signify "not yet resolved".
4780 Changes in version 0.0.7 - 2004-06-07
4781 o Updated the man page to reflect the new features.
4784 Changes in version 0.0.7rc2 - 2004-06-06
4785 o Changes from 0.0.7rc1:
4786 - Make it build on Win32 again.
4787 o Changes from 0.0.6.2:
4788 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
4792 Changes in version 0.0.7rc1 - 2004-06-02
4794 - On sighup, we were adding another log without removing the first
4795 one. So log messages would get duplicated n times for n sighups.
4796 - Several cases of using a connection after we'd freed it. The
4797 problem was that connections that are pending resolve are in both
4798 the pending_resolve tree, and also the circuit's resolving_streams
4799 list. When you want to remove one, you must remove it from both.
4800 - Fix a double-mark-for-close where an end cell arrived for a
4801 resolving stream, and then the resolve failed.
4802 - Check directory signatures based on name of signer, not on whom
4803 we got the directory from. This will let us cache directories more
4806 - Crank up some of our constants to handle more users.
4809 Changes in version 0.0.7pre1 - 2004-06-02
4810 o Fixes for crashes and other obnoxious bugs:
4811 - Fix an epipe bug: sometimes when directory connections failed
4812 to connect, we would give them a chance to flush before closing
4814 - When we detached from a circuit because of resolvefailed, we
4815 would immediately try the same circuit twice more, and then
4816 give up on the resolve thinking we'd tried three different
4818 - Limit the number of intro circuits we'll attempt to build for a
4819 hidden service per 15-minute period.
4820 - Check recommended-software string *early*, before actually parsing
4821 the directory. Thus we can detect an obsolete version and exit,
4822 even if the new directory format doesn't parse.
4823 o Fixes for security bugs:
4824 - Remember which nodes are dirservers when you startup, and if a
4825 random OR enables his dirport, don't automatically assume he's
4826 a trusted dirserver.
4828 - Directory connections were asking the wrong poll socket to
4829 start writing, and not asking themselves to start writing.
4830 - When we detached from a circuit because we sent a begin but
4831 didn't get a connected, we would use it again the first time;
4832 but after that we would correctly switch to a different one.
4833 - Stop warning when the first onion decrypt attempt fails; they
4834 will sometimes legitimately fail now that we rotate keys.
4835 - Override unaligned-access-ok check when $host_cpu is ia64 or
4836 arm. Apparently they allow it but the kernel whines.
4837 - Dirservers try to reconnect periodically too, in case connections
4839 - Fix some memory leaks in directory servers.
4840 - Allow backslash in Win32 filenames.
4841 - Made Tor build complain-free on FreeBSD, hopefully without
4842 breaking other BSD builds. We'll see.
4844 - Doxygen markup on all functions and global variables.
4845 - Make directory functions update routerlist, not replace it. So
4846 now directory disagreements are not so critical a problem.
4847 - Remove the upper limit on number of descriptors in a dirserver's
4848 directory (not that we were anywhere close).
4849 - Allow multiple logfiles at different severity ranges.
4850 - Allow *BindAddress to specify ":port" rather than setting *Port
4851 separately. Allow multiple instances of each BindAddress config
4852 option, so you can bind to multiple interfaces if you want.
4853 - Allow multiple exit policy lines, which are processed in order.
4854 Now we don't need that huge line with all the commas in it.
4855 - Enable accept/reject policies on SOCKS connections, so you can bind
4856 to 0.0.0.0 but still control who can use your OP.
4859 Changes in version 0.0.6.2 - 2004-05-16
4860 o Our integrity-checking digest was checking only the most recent cell,
4861 not the previous cells like we'd thought.
4862 Thanks to Stefan Mark for finding the flaw!
4865 Changes in version 0.0.6.1 - 2004-05-06
4866 o Fix two bugs in our AES counter-mode implementation (this affected
4867 onion-level stream encryption, but not TLS-level). It turns
4868 out we were doing something much more akin to a 16-character
4869 polyalphabetic cipher. Oops.
4870 Thanks to Stefan Mark for finding the flaw!
4871 o Retire moria3 as a directory server, and add tor26 as a directory
4875 Changes in version 0.0.6 - 2004-05-02
4879 Changes in version 0.0.6rc4 - 2004-05-01
4880 o Update the built-in dirservers list to use the new directory format
4881 o Fix a rare seg fault: if a node offering a hidden service attempts
4882 to build a circuit to Alice's rendezvous point and fails before it
4883 reaches the last hop, it retries with a different circuit, but
4885 o Handle windows socket errors correctly.
4888 Changes in version 0.0.6rc3 - 2004-04-28
4889 o Don't expire non-general excess circuits (if we had enough
4890 circuits open, we were expiring rendezvous circuits -- even
4891 when they had a stream attached. oops.)
4892 o Fetch randomness from /dev/urandom better (not via fopen/fread)
4893 o Better debugging for tls errors
4894 o Some versions of openssl have an SSL_pending function that erroneously
4895 returns bytes when there is a non-application record pending.
4896 o Set Content-Type on the directory and hidserv descriptor.
4897 o Remove IVs from cipher code, since AES-ctr has none.
4898 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
4899 o We were using an array of length zero in a few places.
4900 o win32's gethostbyname can't resolve an IP to an IP.
4901 o win32's close can't close a socket.
4904 Changes in version 0.0.6rc2 - 2004-04-26
4905 o Fix a bug where we were closing tls connections intermittently.
4906 It turns out openssl keeps its errors around -- so if an error
4907 happens, and you don't ask about it, and then another openssl
4908 operation happens and succeeds, and you ask if there was an error,
4909 it tells you about the first error. Fun fun.
4910 o Fix a bug that's been lurking since 27 may 03 (!)
4911 When passing back a destroy cell, we would use the wrong circ id.
4912 'Mostly harmless', but still worth fixing.
4913 o Since we don't support truncateds much, don't bother sending them;
4914 just close the circ.
4915 o check for <machine/limits.h> so we build on NetBSD again (I hope).
4916 o don't crash if a conn that sent a begin has suddenly lost its circuit
4917 (this was quite rare).
4920 Changes in version 0.0.6rc1 - 2004-04-25
4921 o We now rotate link (tls context) keys and onion keys.
4922 o CREATE cells now include oaep padding, so you can tell
4923 if you decrypted them correctly.
4924 o Add bandwidthburst to server descriptor.
4925 o Directories now say which dirserver signed them.
4926 o Use a tor_assert macro that logs failed assertions too.
4929 Changes in version 0.0.6pre5 - 2004-04-18
4930 o changes from 0.0.6pre4:
4931 - make tor build on broken freebsd 5.2 installs
4932 - fix a failed assert when you try an intro point, get a nack, and try
4933 a second one and it works.
4934 - when alice uses a port that the hidden service doesn't accept,
4935 it now sends back an end cell (denied by exit policy). otherwise
4936 alice would just have to wait to time out.
4937 - fix another rare bug: when we had tried all the intro
4938 points for a hidden service, we fetched the descriptor
4939 again, but we left our introcirc thinking it had already
4940 sent an intro, so it kept waiting for a response...
4941 - bugfix: when you sleep your hidden-service laptop, as soon
4942 as it wakes up it tries to upload a service descriptor, but
4943 socketpair fails for some reason (localhost not up yet?).
4944 now we simply give up on that upload, and we'll try again later.
4945 i'd still like to find the bug though.
4946 - if an intro circ waiting for an ack dies before getting one, then
4948 - we were reusing stale service descriptors and refetching usable
4952 Changes in version 0.0.6pre4 - 2004-04-14
4953 o changes from 0.0.6pre3:
4954 - when bob fails to connect to the rendezvous point, and his
4955 circ didn't fail because of the rendezvous point itself, then
4956 he retries a couple of times
4957 - we expire introduction and rendezvous circs more thoroughly
4958 (sometimes they were hanging around forever)
4959 - we expire unattached rendezvous streams that have been around
4960 too long (they were sticking around forever).
4961 - fix a measly fencepost error that was crashing everybody with
4965 Changes in version 0.0.6pre3 - 2004-04-14
4966 o changes from 0.0.6pre2:
4967 - make hup work again
4968 - fix some memory leaks for dirservers
4969 - allow more skew in rendezvous descriptor timestamps, to help
4970 handle people like blanu who don't know what time it is
4971 - normal circs are 3 hops, but some rend/intro circs are 4, if
4972 the initiator doesn't get to choose the last hop
4973 - send acks for introductions, so alice can know whether to try
4975 - bob publishes intro points more correctly
4976 o changes from 0.0.5:
4977 - fix an assert trigger that's been plaguing us since the days
4978 of 0.0.2prexx (thanks weasel!)
4979 - retry stream correctly when we fail to connect because of
4980 exit-policy-reject (should try another) or can't-resolve-address
4981 (also should try another, because dns on random internet servers
4983 - when we hup a dirserver and we've *removed* a server from the
4984 approved-routers list, now we remove that server from the
4985 in-memory directories too
4988 Changes in version 0.0.6pre2 - 2004-04-08
4989 o We fixed our base32 implementation. Now it works on all architectures.
4992 Changes in version 0.0.6pre1 - 2004-04-08
4994 - Hidden services and rendezvous points are implemented. Go to
4995 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
4996 hidden services. (This only works via a socks4a proxy such as
4997 Privoxy, and currently it's quite slow.)
5000 Changes in version 0.0.5 - 2004-03-30
5004 Changes in version 0.0.5rc3 - 2004-03-29
5005 o Install torrc as torrc.sample -- we no longer clobber your
5007 o Re-enable recommendedversion checking (we broke it in rc2, oops)
5008 o Add in a 'notice' log level for things the operator should hear
5009 but that aren't warnings
5012 Changes in version 0.0.5rc2 - 2004-03-29
5013 o Hold socks connection open until reply is flushed (if possible)
5014 o Make exit nodes resolve IPs to IPs immediately, rather than asking
5015 the dns farm to do it.
5016 o Fix c99 aliasing warnings in rephist.c
5017 o Don't include server descriptors that are older than 24 hours in the
5019 o Give socks 'reject' replies their whole 15s to attempt to flush,
5020 rather than seeing the 60s timeout and assuming the flush had failed.
5021 o Clean automake droppings from the cvs repository
5024 Changes in version 0.0.5rc1 - 2004-03-28
5025 o Fix mangled-state bug in directory fetching (was causing sigpipes).
5026 o Only build circuits after we've fetched the directory: clients were
5027 using only the directory servers before they'd fetched a directory.
5028 This also means longer startup time; so it goes.
5029 o Fix an assert trigger where an OP would fail to handshake, and we'd
5030 expect it to have a nickname.
5031 o Work around a tsocks bug: do a socks reject when AP connection dies
5032 early, else tsocks goes into an infinite loop.
5035 Changes in version 0.0.4 - 2004-03-26
5036 o When connecting to a dirserver or OR and the network is down,
5040 Changes in version 0.0.3 - 2004-03-26
5041 o Warn and fail if server chose a nickname with illegal characters
5042 o Port to Solaris and Sparc:
5043 - include missing header fcntl.h
5044 - have autoconf find -lsocket -lnsl automatically
5045 - deal with hardware word alignment
5046 - make uname() work (solaris has a different return convention)
5047 - switch from using signal() to sigaction()
5048 o Preliminary work on reputation system:
5049 - Keep statistics on success/fail of connect attempts; they're published
5050 by kill -USR1 currently.
5051 - Add a RunTesting option to try to learn link state by creating test
5052 circuits, even when SocksPort is off.
5053 - Remove unused open circuits when there are too many.
5056 Changes in version 0.0.2 - 2004-03-19
5057 - Include strlcpy and strlcat for safer string ops
5058 - define INADDR_NONE so we compile (but still not run) on solaris
5061 Changes in version 0.0.2pre27 - 2004-03-14
5063 - Allow internal tor networks (we were rejecting internal IPs,
5064 now we allow them if they're set explicitly).
5065 - And fix a few endian issues.
5068 Changes in version 0.0.2pre26 - 2004-03-14
5070 - If a stream times out after 15s without a connected cell, don't
5071 try that circuit again: try a new one.
5072 - Retry streams at most 4 times. Then give up.
5073 - When a dirserver gets a descriptor from an unknown router, it
5074 logs its fingerprint (so the dirserver operator can choose to
5075 accept it even without mail from the server operator).
5076 - Inform unapproved servers when we reject their descriptors.
5077 - Make tor build on Windows again. It works as a client, who knows
5079 - Clearer instructions in the torrc for how to set up a server.
5080 - Be more efficient about reading fd's when our global token bucket
5081 (used for rate limiting) becomes empty.
5083 - Stop asserting that computers always go forward in time. It's
5085 - When we sent a cell (e.g. destroy) and then marked an OR connection
5086 expired, we might close it before finishing a flush if the other
5087 side isn't reading right then.
5088 - Don't allow dirservers to start if they haven't defined
5090 - We were caching transient dns failures. Oops.
5091 - Prevent servers from publishing an internal IP as their address.
5092 - Address a strcat vulnerability in circuit.c
5095 Changes in version 0.0.2pre25 - 2004-03-04
5097 - Put the OR's IP in its router descriptor, not its fqdn. That way
5098 we'll stop being stalled by gethostbyname for nodes with flaky dns,
5101 - If the user typed in an address that didn't resolve, the server
5105 Changes in version 0.0.2pre24 - 2004-03-03
5107 - Fix an assertion failure in dns.c, where we were trying to dequeue
5108 a pending dns resolve even if it wasn't pending
5109 - Fix a spurious socks5 warning about still trying to write after the
5110 connection is finished.
5111 - Hold certain marked_for_close connections open until they're finished
5112 flushing, rather than losing bytes by closing them too early.
5113 - Correctly report the reason for ending a stream
5114 - Remove some duplicate calls to connection_mark_for_close
5115 - Put switch_id and start_daemon earlier in the boot sequence, so it
5116 will actually try to chdir() to options.DataDirectory
5117 - Make 'make test' exit(1) if a test fails; fix some unit tests
5118 - Make tor fail when you use a config option it doesn't know about,
5119 rather than warn and continue.
5120 - Make --version work
5121 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
5124 Changes in version 0.0.2pre23 - 2004-02-29
5126 - Print a statement when the first circ is finished, so the user
5128 - If a relay cell is unrecognized at the end of the circuit,
5129 send back a destroy. (So attacks to mutate cells are more
5131 - New config option 'excludenodes' to avoid certain nodes for circuits.
5132 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
5133 so you can collect coredumps there.
5135 - Fix a bug in tls flushing where sometimes data got wedged and
5136 didn't flush until more data got sent. Hopefully this bug was
5137 a big factor in the random delays we were seeing.
5138 - Make 'connected' cells include the resolved IP, so the client
5139 dns cache actually gets populated.
5140 - Disallow changing from ORPort=0 to ORPort>0 on hup.
5141 - When we time-out on a stream and detach from the circuit, send an
5142 end cell down it first.
5143 - Only warn about an unknown router (in exitnodes, entrynodes,
5144 excludenodes) after we've fetched a directory.
5147 Changes in version 0.0.2pre22 - 2004-02-26
5149 - Servers publish less revealing uname information in descriptors.
5150 - More memory tracking and assertions, to crash more usefully when
5152 - If the default torrc isn't there, just use some default defaults.
5153 Plus provide an internal dirservers file if they don't have one.
5154 - When the user tries to use Tor as an http proxy, give them an http
5155 501 failure explaining that we're a socks proxy.
5156 - Dump a new router.desc on hup, to help confused people who change
5157 their exit policies and then wonder why router.desc doesn't reflect
5159 - Clean up the generic tor.sh init script that we ship with.
5161 - If the exit stream is pending on the resolve, and a destroy arrives,
5162 then the stream wasn't getting removed from the pending list. I
5163 think this was the one causing recent server crashes.
5164 - Use a more robust poll on OSX 10.3, since their poll is flaky.
5165 - When it couldn't resolve any dirservers, it was useless from then on.
5166 Now it reloads the RouterFile (or default dirservers) if it has no
5168 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
5169 many users don't even *have* a /usr/local/sbin/.
5172 Changes in version 0.0.2pre21 - 2004-02-18
5174 - There's a ChangeLog file that actually reflects the changelog.
5175 - There's a 'torify' wrapper script, with an accompanying
5176 tor-tsocks.conf, that simplifies the process of using tsocks for
5177 tor. It even has a man page.
5178 - The tor binary gets installed to sbin rather than bin now.
5179 - Retry streams where the connected cell hasn't arrived in 15 seconds
5180 - Clean up exit policy handling -- get the default out of the torrc,
5181 so we can update it without forcing each server operator to fix
5183 - Allow imaps and pop3s in default exit policy
5185 - Prevent picking middleman nodes as the last node in the circuit
5188 Changes in version 0.0.2pre20 - 2004-01-30
5190 - We now have a deb package, and it's in debian unstable. Go to
5192 - I've split the TotalBandwidth option into BandwidthRate (how many
5193 bytes per second you want to allow, long-term) and
5194 BandwidthBurst (how many bytes you will allow at once before the cap
5195 kicks in). This better token bucket approach lets you, say, set
5196 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
5197 performance while not exceeding your monthly bandwidth quota.
5198 - Push out a tls record's worth of data once you've got it, rather
5199 than waiting until you've read everything waiting to be read. This
5200 may improve performance by pipelining better. We'll see.
5201 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
5202 from failed circuits (if they haven't been connected yet) and attach
5204 - Expire old streams that haven't managed to connect. Some day we'll
5205 have them reattach to new circuits instead.
5208 - Fix several memory leaks that were causing servers to become bloated
5210 - Fix a few very rare assert triggers. A few more remain.
5211 - Setuid to User _before_ complaining about running as root.
5214 Changes in version 0.0.2pre19 - 2004-01-07
5216 - Fix deadlock condition in dns farm. We were telling a child to die by
5217 closing the parent's file descriptor to him. But newer children were
5218 inheriting the open file descriptor from the parent, and since they
5219 weren't closing it, the socket never closed, so the child never read
5220 eof, so he never knew to exit. Similarly, dns workers were holding
5221 open other sockets, leading to all sorts of chaos.
5222 - New cleaner daemon() code for forking and backgrounding.
5223 - If you log to a file, it now prints an entry at the top of the
5224 logfile so you know it's working.
5225 - The onionskin challenge length was 30 bytes longer than necessary.
5226 - Started to patch up the spec so it's not quite so out of date.
5229 Changes in version 0.0.2pre18 - 2004-01-02
5231 - Fix endian issues with the 'integrity' field in the relay header.
5232 - Fix a potential bug where connections in state
5233 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
5236 Changes in version 0.0.2pre17 - 2003-12-30
5238 - Made --debuglogfile (or any second log file, actually) work.
5239 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
5240 adversary could force us into an infinite loop.
5243 - Each onionskin handshake now includes a hash of the computed key,
5244 to prove the server's identity and help perfect forward secrecy.
5245 - Changed cell size from 256 to 512 bytes (working toward compatibility
5247 - Changed cell length to 2 bytes, and moved it to the relay header.
5248 - Implemented end-to-end integrity checking for the payloads of
5250 - Separated streamid from 'recognized' (otherwise circuits will get
5251 messed up when we try to have streams exit from the middle). We
5252 use the integrity-checking to confirm that a cell is addressed to
5254 - Randomize the initial circid and streamid values, so an adversary who
5255 breaks into a node can't learn how many circuits or streams have
5259 Changes in version 0.0.2pre16 - 2003-12-14
5261 - Fixed a bug that made HUP trigger an assert
5262 - Fixed a bug where a circuit that immediately failed wasn't being
5263 counted as a failed circuit in counting retries.
5266 - Now we close the circuit when we get a truncated cell: otherwise we're
5267 open to an anonymity attack where a bad node in the path truncates
5268 the circuit and then we open streams at him.
5269 - Add port ranges to exit policies
5270 - Add a conservative default exit policy
5271 - Warn if you're running tor as root
5272 - on HUP, retry OR connections and close/rebind listeners
5273 - options.EntryNodes: try these nodes first when picking the first node
5274 - options.ExitNodes: if your best choices happen to include any of
5275 your preferred exit nodes, you choose among just those preferred
5277 - options.ExcludedNodes: nodes that are never picked in path building
5280 Changes in version 0.0.2pre15 - 2003-12-03
5281 o Robustness and bugfixes:
5282 - Sometimes clients would cache incorrect DNS resolves, which would
5283 really screw things up.
5284 - An OP that goes offline would slowly leak all its sockets and stop
5286 - A wide variety of bugfixes in exit node selection, exit policy
5287 handling, and processing pending streams when a new circuit is
5289 - Pick nodes for a path only from those the directory says are up
5290 - Choose randomly from all running dirservers, not always the first one
5291 - Increase allowed http header size for directory fetch.
5292 - Stop writing to stderr (if we're daemonized it will be closed).
5293 - Enable -g always, so cores will be more useful to me.
5294 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
5297 - Wrote a man page. It lists commonly used options.
5300 - Change default loglevel to warn.
5301 - Make PidFile default to null rather than littering in your CWD.
5302 - OnionRouter config option is now obsolete. Instead it just checks
5304 - Moved to a single unified torrc file for both clients and servers.
5307 Changes in version 0.0.2pre14 - 2003-11-29
5308 o Robustness and bugfixes:
5309 - Force the admin to make the DataDirectory himself
5310 - to get ownership/permissions right
5311 - so clients no longer make a DataDirectory and then never use it
5312 - fix bug where a client who was offline for 45 minutes would never
5313 pull down a directory again
5314 - fix (or at least hide really well) the dns assert bug that was
5315 causing server crashes
5316 - warnings and improved robustness wrt clockskew for certs
5317 - use the native daemon(3) to daemonize, when available
5318 - exit if bind() fails
5319 - exit if neither socksport nor orport is defined
5320 - include our own tor_timegm (Win32 doesn't have its own)
5321 - bugfix for win32 with lots of connections
5322 - fix minor bias in PRNG
5323 - make dirserver more robust to corrupt cached directory
5326 - Wrote the design document (woo)
5328 o Circuit building and exit policies:
5329 - Circuits no longer try to use nodes that the directory has told them
5331 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
5332 bitcounts (18.0.0.0/8).
5333 - Make AP connections standby for a circuit if no suitable circuit
5334 exists, rather than failing
5335 - Circuits choose exit node based on addr/port, exit policies, and
5336 which AP connections are standing by
5337 - Bump min pathlen from 2 to 3
5338 - Relay end cells have a payload to describe why the stream ended.
5339 - If the stream failed because of exit policy, try again with a new
5341 - Clients have a dns cache to remember resolved addresses.
5342 - Notice more quickly when we have no working circuits
5345 - APPort is now called SocksPort
5346 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
5348 - RecommendedVersions is now a config variable rather than
5349 hardcoded (for dirservers)
5350 - Reloads config on HUP
5351 - Usage info on -h or --help
5352 - If you set User and Group config vars, it'll setu/gid to them.
5354 Changes in version 0.0.2pre13 - 2003-10-19
5355 o General stability:
5356 - SSL_write no longer fails when it returns WANTWRITE and the number
5357 of bytes in the buf has changed by the next SSL_write call.
5358 - Fix segfault fetching directory when network is down
5359 - Fix a variety of minor memory leaks
5360 - Dirservers reload the fingerprints file on HUP, so I don't have
5361 to take down the network when I approve a new router
5362 - Default server config file has explicit Address line to specify fqdn
5365 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
5366 - Make listener connections not ever alloc bufs
5368 o Autoconf improvements:
5369 - don't clobber an external CFLAGS in ./configure
5370 - Make install now works
5371 - create var/lib/tor on make install
5372 - autocreate a tor.sh initscript to help distribs
5373 - autocreate the torrc and sample-server-torrc with correct paths
5375 o Log files and Daemonizing now work:
5376 - If --DebugLogFile is specified, log to it at -l debug
5377 - If --LogFile is specified, use it instead of commandline
5378 - If --RunAsDaemon is set, tor forks and backgrounds on startup