1 Changes in version 0.2.0.10-alpha - 2007-1?-??
3 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
4 it, it had no AES, and it hasn't seen any security patches since 2004.
7 - Refuse to start if both ORPort and UseBridges are set. Bugfix
10 o Minor bugfixes (memory leaks):
11 - Stop leaking memory every time we parse a v3 certificate. Bugfix
13 - Stop leaking memory every time we load a v3 certificate. Bugfix
14 on 0.2.0.1-alpha. Fixes Bug 536
15 - Stop leaking a cached networkstatus on exit. Bugfix on
17 - Stop leaking voter information every time we free a consensus. Bugfix
19 - Stop leaking signed data every time we check a voter signature.
20 Bugfix on 0.2.0.3-alpha.
21 - Stop leaking a signature every time we fail to parse a consensus or
22 a vote. Bugfix on 0.2.0.3-alpha.
23 - Stop leaking v2_download_status_map on shutdown. Bugfix on
27 Changes in version 0.2.0.9-alpha - 2007-10-24
28 o Major features (directory system):
29 - Clients now download v3 consensus networkstatus documents instead
30 of v2 networkstatus documents. Clients and caches now base their
31 opinions about routers on these consensus documents. Clients only
32 download router descriptors listed in the consensus.
33 - Authorities now list servers who have the same nickname as
34 a different named server, but list them with a new flag,
35 "Unnamed". Now we can list servers that happen to pick the same
36 nickname as a server that registered two years ago and then
37 disappeared. Partially implements proposal 122.
38 - If the consensus list a router as "Unnamed", the name is assigned
39 to a different router: do not identify the router by that name.
40 Partially implements proposal 122.
41 - Authorities can now come to a consensus on which method to use to
42 compute the consensus. This gives us forward compatibility.
45 - Stop publishing a new server descriptor just because we HUP or
46 when we find our DirPort to be reachable but won't actually publish
47 it. New descriptors without any real changes are dropped by the
48 authorities, and can screw up our "publish every 18 hours" schedule.
50 - When a router wasn't listed in a new networkstatus, we were leaving
51 the flags for that router alone -- meaning it remained Named,
52 Running, etc -- even though absence from the networkstatus means
53 that it shouldn't be considered to exist at all anymore. Now we
54 clear all the flags for routers that fall out of the networkstatus
55 consensus. Fixes bug 529; bugfix on 0.1.2.x.
56 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
57 extrainfo documents and then discard them immediately for not
58 matching the latest router. Bugfix on 0.2.0.1-alpha.
60 o Minor features (v3 directory protocol):
61 - Allow tor-gencert to generate a new certificate without replacing
63 - Allow certificates to include an address.
64 - When we change our directory-cache settings, reschedule all voting
65 and download operations.
66 - Reattempt certificate downloads immediately on failure, as long as
67 we haven't failed a threshold number of times yet.
68 - Delay retrying consensus downloads while we're downloading
69 certificates to verify the one we just got. Also, count getting a
70 consensus that we already have (or one that isn't valid) as a failure,
71 and count failing to get the certificates after 20 minutes as a
73 - Build circuits and download descriptors even if our consensus is a
74 little expired. (This feature will go away once authorities are
77 o Minor features (router descriptor cache):
78 - If we find a cached-routers file that's been sitting around for more
79 than 28 days unmodified, then most likely it's a leftover from
80 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
82 - When we (as a cache) download a descriptor because it was listed
83 in a consensus, remember when the consensus was supposed to expire,
84 and don't expire the descriptor until then.
86 o Minor features (performance):
87 - Call routerlist_remove_old_routers() much less often. This should
88 speed startup, especially on directory caches.
89 - Don't try to launch new descriptor downloads quite so often when we
90 already have enough directory information to build circuits.
91 - Base64 decoding was actually showing up on our profile when parsing
92 the initial descriptor file; switch to an in-process all-at-once
93 implementation that's about 3.5x times faster than calling out to
96 o Minor features (compilation):
97 - Detect non-ASCII platforms (if any still exist) and refuse to
98 build there: some of our code assumes that 'A' is 65 and so on.
100 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
101 - Make the "next period" votes into "current period" votes immediately
102 after publishing the consensus; avoid a heisenbug that made them
103 stick around indefinitely.
104 - When we discard a vote as a duplicate, do not report this as
106 - Treat missing v3 keys or certificates as an error when running as a
107 v3 directory authority.
108 - When we're configured to be a v3 authority, but we're only listed
109 as a non-v3 authority in our DirServer line for ourself, correct
111 - If an authority doesn't have a qualified hostname, just put
112 its address in the vote. This fixes the problem where we referred to
113 "moria on moria:9031."
114 - Distinguish between detached signatures for the wrong period, and
115 detached signatures for a divergent vote.
116 - Fix a small memory leak when computing a consensus.
117 - When there's no concensus, we were forming a vote every 30
118 minutes, but writing the "valid-after" line in our vote based
119 on our configured V3AuthVotingInterval: so unless the intervals
120 matched up, we immediately rejected our own vote because it didn't
121 start at the voting interval that caused us to construct a vote.
123 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
124 - Delete unverified-consensus when the real consensus is set.
125 - Consider retrying a consensus networkstatus fetch immediately
126 after one fails: don't wait 60 seconds to notice.
127 - When fetching a consensus as a cache, wait until a newer consensus
128 should exist before trying to replace the current one.
129 - Use a more forgiving schedule for retrying failed consensus
130 downloads than for other types.
132 o Minor bugfixes (other directory issues):
133 - Correct the implementation of "download votes by digest." Bugfix on
135 - Authorities no longer send back "400 you're unreachable please fix
136 it" errors to Tor servers that aren't online all the time. We're
137 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
139 o Minor bugfixes (controller):
140 - Don't reset trusted dir server list when we set a configuration
141 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
142 - Respond to INT and TERM SIGNAL commands before we execute the
143 signal, in case the signal shuts us down. We had a patch in
144 0.1.2.1-alpha that tried to do this by queueing the response on
145 the connection's buffer before shutting down, but that really
146 isn't the same thing at all. Bug located by Matt Edman.
148 o Minor bugfixes (misc):
149 - Correctly check for bad options to the "PublishServerDescriptor"
150 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
151 - Stop leaking memory on failing case of base32_decode, and make
152 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
153 - Don't try to download extrainfo documents when we're trying to
154 fetch enough directory info to build a circuit: having enough
155 info should get priority. Bugfix on 0.2.0.x.
156 - Don't complain that "your server has not managed to confirm that its
157 ports are reachable" if we haven't been able to build any circuits
158 yet. Bug found by spending four hours without a v3 consensus. Bugfix
160 - Detect the reason for failing to mmap a descriptor file we just
161 wrote, and give a more useful log message. Fixes bug 533. Bugfix
164 o Code simplifications and refactoring:
165 - Remove support for the old bw_accounting file: we've been storing
166 bandwidth accounting information in the state file since
167 0.1.2.5-alpha. This may result in bandwidth accounting errors
168 if you try to upgrade from 0.1.1.x or earlier, or if you try to
169 downgrade to 0.1.1.x or earlier.
170 - New convenience code to locate a file within the DataDirectory.
171 - Move non-authority functionality out of dirvote.c.
172 - Refactor the arguments for router_pick_{directory_|trusteddir}server
173 so that they all take the same named flags.
176 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
177 Unix users an easy way to script their Tor process (e.g. by
178 adjusting bandwidth based on the time of the day).
181 Changes in version 0.2.0.8-alpha - 2007-10-12
182 This eighth development snapshot fixes a crash bug that's been bothering
183 us since February 2007, lets bridge authorities store a list of bridge
184 descriptors they've seen, gets v3 directory voting closer to working,
185 starts caching v3 directory consensus documents on directory mirrors,
186 and fixes a variety of smaller issues including some minor memory leaks.
188 o Major features (router descriptor cache):
189 - Store routers in a file called cached-descriptors instead of in
190 cached-routers. Initialize cached-descriptors from cached-routers
191 if the old format is around. The new format allows us to store
192 annotations along with descriptors.
193 - Use annotations to record the time we received each descriptor, its
194 source, and its purpose.
195 - Disable the SETROUTERPURPOSE controller command: it is now
197 - Controllers should now specify cache=no or cache=yes when using
198 the +POSTDESCRIPTOR command.
199 - Bridge authorities now write bridge descriptors to disk, meaning
200 we can export them to other programs and begin distributing them
203 o Major features (directory authorities):
204 - When a v3 authority is missing votes or signatures, it now tries
206 - Directory authorities track weighted fractional uptime as well as
207 weighted mean-time-between failures. WFU is suitable for deciding
208 whether a node is "usually up", while MTBF is suitable for deciding
209 whether a node is "likely to stay up." We need both, because
210 "usually up" is a good requirement for guards, while "likely to
211 stay up" is a good requirement for long-lived connections.
213 o Major features (v3 directory system):
214 - Caches now download v3 network status documents as needed,
215 and download the descriptors listed in them.
216 - All hosts now attempt to download and keep fresh v3 authority
217 certificates, and re-attempt after failures.
218 - More internal-consistency checks for vote parsing.
220 o Major bugfixes (crashes):
221 - If a connection is shut down abruptly because of something that
222 happened inside connection_flushed_some(), do not call
223 connection_finished_flushing(). Should fix bug 451. Bugfix on
226 o Major bugfixes (performance):
227 - Fix really bad O(n^2) performance when parsing a long list of
228 routers: Instead of searching the entire list for an "extra-info "
229 string which usually wasn't there, once for every routerinfo
230 we read, just scan lines forward until we find one we like.
232 - When we add data to a write buffer in response to the data on that
233 write buffer getting low because of a flush, do not consider the
234 newly added data as a candidate for immediate flushing, but rather
235 make it wait until the next round of writing. Otherwise, we flush
236 and refill recursively, and a single greedy TLS connection can
237 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
239 o Minor features (v3 authority system):
240 - Add more ways for tools to download the votes that lead to the
242 - Send a 503 when low on bandwidth and a vote, consensus, or
243 certificate is requested.
244 - If-modified-since is now implemented properly for all kinds of
245 certificate requests.
247 o Minor bugfixes (network statuses):
248 - Tweak the implementation of proposal 109 slightly: allow at most
249 two Tor servers on the same IP address, except if it's the location
250 of a directory authority, in which case allow five. Bugfix on
253 o Minor bugfixes (controller):
254 - When sending a status event to the controller telling it that an
255 OR address is reachable, set the port correctly. (Previously we
256 were reporting the dir port.) Bugfix on 0.1.2.x.
258 o Minor bugfixes (v3 directory system):
259 - Fix logic to look up a cert by its signing key digest. Bugfix on
261 - Only change the reply to a vote to "OK" if it's not already
262 set. This gets rid of annoying "400 OK" log messages, which may
263 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
264 - When we get a valid consensus, recompute the voting schedule.
265 - Base the valid-after time of a vote on the consensus voting
266 schedule, not on our preferred schedule.
267 - Make the return values and messages from signature uploads and
268 downloads more sensible.
269 - Fix a memory leak when serving votes and consensus documents, and
270 another when serving certificates.
272 o Minor bugfixes (performance):
273 - Use a slightly simpler string hashing algorithm (copying Python's
274 instead of Java's) and optimize our digest hashing algorithm to take
275 advantage of 64-bit platforms and to remove some possibly-costly
277 - Fix a minor memory leak whenever we parse guards from our state
278 file. Bugfix on 0.2.0.7-alpha.
279 - Fix a minor memory leak whenever we write out a file. Bugfix on
281 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
282 command. Bugfix on 0.2.0.5-alpha.
284 o Minor bugfixes (portability):
285 - On some platforms, accept() can return a broken address. Detect
286 this more quietly, and deal accordingly. Fixes bug 483.
287 - Stop calling tor_strlower() on uninitialized memory in some cases.
288 Bugfix in 0.2.0.7-alpha.
290 o Minor bugfixes (usability):
291 - Treat some 403 responses from directory servers as INFO rather than
292 WARN-severity events.
293 - It's not actually an error to find a non-pending entry in the DNS
294 cache when canceling a pending resolve. Don't log unless stuff is
295 fishy. Resolves bug 463.
297 o Minor bugfixes (anonymity):
298 - Never report that we've used more bandwidth than we're willing to
299 relay: it leaks how much non-relay traffic we're using. Resolves
301 - When looking for a circuit to cannibalize, consider family as well
302 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
303 circuit cannibalization).
305 o Code simplifications and refactoring:
306 - Make a bunch of functions static. Remove some dead code.
307 - Pull out about a third of the really big routerlist.c; put it in a
308 new module, networkstatus.c.
309 - Merge the extra fields in local_routerstatus_t back into
310 routerstatus_t: we used to need one routerstatus_t for each
311 authority's opinion, plus a local_routerstatus_t for the locally
312 computed consensus opinion. To save space, we put the locally
313 modified fields into local_routerstatus_t, and only the common
314 stuff into routerstatus_t. But once v3 directories are in use,
315 clients and caches will no longer need to hold authority opinions;
316 thus, the rationale for keeping the types separate is now gone.
317 - Make the code used to reschedule and reattempt downloads more
319 - Turn all 'Are we a directory server/mirror?' logic into a call to
321 - Remove the code to generate the oldest (v1) directory format.
322 The code has been disabled since 0.2.0.5-alpha.
325 Changes in version 0.2.0.7-alpha - 2007-09-21
326 This seventh development snapshot makes bridges work again, makes bridge
327 authorities work for the first time, fixes two huge performance flaws
328 in hidden services, and fixes a variety of minor issues.
330 o New directory authorities:
331 - Set up moria1 and tor26 as the first v3 directory authorities. See
332 doc/spec/dir-spec.txt for details on the new directory design.
334 o Major bugfixes (crashes):
335 - Fix possible segfaults in functions called from
336 rend_process_relay_cell(). Bugfix on 0.1.2.x.
338 o Major bugfixes (bridges):
339 - Fix a bug that made servers send a "404 Not found" in response to
340 attempts to fetch their server descriptor. This caused Tor servers
341 to take many minutes to establish reachability for their DirPort,
342 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
343 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
344 users configure that and specify a bridge with an identity
345 fingerprint, now they will lookup the bridge descriptor at the
346 default bridge authority via a one-hop tunnel, but once circuits
347 are established they will switch to a three-hop tunnel for later
348 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
350 o Major bugfixes (hidden services):
351 - Hidden services were choosing introduction points uniquely by
352 hexdigest, but when constructing the hidden service descriptor
353 they merely wrote the (potentially ambiguous) nickname.
354 - Clients now use the v2 intro format for hidden service
355 connections: they specify their chosen rendezvous point by identity
356 digest rather than by (potentially ambiguous) nickname. Both
357 are bugfixes on 0.1.2.x, and they could speed up hidden service
358 connections dramatically. Thanks to Karsten Loesing.
360 o Minor features (security):
361 - As a client, do not believe any server that tells us that an
362 address maps to an internal address space.
363 - Make it possible to enable HashedControlPassword and
364 CookieAuthentication at the same time.
366 o Minor features (guard nodes):
367 - Tag every guard node in our state file with the version that
368 we believe added it, or with our own version if we add it. This way,
369 if a user temporarily runs an old version of Tor and then switches
370 back to a new one, she doesn't automatically lose her guards.
372 o Minor features (speed):
373 - When implementing AES counter mode, update only the portions of the
374 counter buffer that need to change, and don't keep separate
375 network-order and host-order counters when they are the same (i.e.,
376 on big-endian hosts.)
378 o Minor features (controller):
379 - Accept LF instead of CRLF on controller, since some software has a
380 hard time generating real Internet newlines.
381 - Add GETINFO values for the server status events
382 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
386 - Routers no longer include bandwidth-history lines in their
387 descriptors; this information is already available in extra-info
388 documents, and including it in router descriptors took up 60%
389 (!) of compressed router descriptor downloads. Completes
390 implementation of proposal 104.
391 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
392 and TorControl.py, as they use the old v0 controller protocol,
393 and are obsoleted by TorFlow anyway.
394 - Drop support for v1 rendezvous descriptors, since we never used
395 them anyway, and the code has probably rotted by now. Based on
396 patch from Karsten Loesing.
397 - On OSX, stop warning the user that kqueue support in libevent is
398 "experimental", since it seems to have worked fine for ages.
401 - When generating information telling us how to extend to a given
402 router, do not try to include the nickname if it is absent. Fixes
403 bug 467. Bugfix on 0.2.0.3-alpha.
404 - Fix a user-triggerable (but not remotely-triggerable) segfault
405 in expand_filename(). Bugfix on 0.1.2.x.
406 - Fix a memory leak when freeing incomplete requests from DNSPort.
407 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
408 - Don't try to access (or alter) the state file when running
409 --list-fingerprint or --verify-config or --hash-password. (Resolves
410 bug 499.) Bugfix on 0.1.2.x.
411 - Servers used to decline to publish their DirPort if their
412 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
413 were below a threshold. Now they only look at BandwidthRate and
414 RelayBandwidthRate. Bugfix on 0.1.2.x.
415 - Remove an optimization in the AES counter-mode code that assumed
416 that the counter never exceeded 2^68. When the counter can be set
417 arbitrarily as an IV (as it is by Karsten's new hidden services
418 code), this assumption no longer holds. Bugfix on 0.1.2.x.
419 - Resume listing "AUTHORITY" flag for authorities in network status.
420 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
422 o Code simplifications and refactoring:
423 - Revamp file-writing logic so we don't need to have the entire
424 contents of a file in memory at once before we write to disk. Tor,
426 - Turn "descriptor store" into a full-fledged type.
427 - Move all NT services code into a separate source file.
428 - Unify all code that computes medians, percentile elements, etc.
429 - Get rid of a needless malloc when parsing address policies.
432 Changes in version 0.1.2.17 - 2007-08-30
433 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
434 X bundles. Vidalia 0.0.14 makes authentication required for the
435 ControlPort in the default configuration, which addresses important
436 security risks. Everybody who uses Vidalia (or another controller)
439 In addition, this Tor update fixes major load balancing problems with
440 path selection, which should speed things up a lot once many people
443 o Major bugfixes (security):
444 - We removed support for the old (v0) control protocol. It has been
445 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
446 become more of a headache than it's worth.
448 o Major bugfixes (load balancing):
449 - When choosing nodes for non-guard positions, weight guards
450 proportionally less, since they already have enough load. Patch
452 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
453 will allow fast Tor servers to get more attention.
454 - When we're upgrading from an old Tor version, forget our current
455 guards and pick new ones according to the new weightings. These
456 three load balancing patches could raise effective network capacity
457 by a factor of four. Thanks to Mike Perry for measurements.
459 o Major bugfixes (stream expiration):
460 - Expire not-yet-successful application streams in all cases if
461 they've been around longer than SocksTimeout. Right now there are
462 some cases where the stream will live forever, demanding a new
463 circuit every 15 seconds. Fixes bug 454; reported by lodger.
465 o Minor features (controller):
466 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
467 is valid before any authentication has been received. It tells
468 a controller what kind of authentication is expected, and what
469 protocol is spoken. Implements proposal 119.
471 o Minor bugfixes (performance):
472 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
473 greatly speeding up loading cached-routers from disk on startup.
474 - Disable sentinel-based debugging for buffer code: we squashed all
475 the bugs that this was supposed to detect a long time ago, and now
476 its only effect is to change our buffer sizes from nice powers of
477 two (which platform mallocs tend to like) to values slightly over
478 powers of two (which make some platform mallocs sad).
480 o Minor bugfixes (misc):
481 - If exit bandwidth ever exceeds one third of total bandwidth, then
482 use the correct formula to weight exit nodes when choosing paths.
483 Based on patch from Mike Perry.
484 - Choose perfectly fairly among routers when choosing by bandwidth and
485 weighting by fraction of bandwidth provided by exits. Previously, we
486 would choose with only approximate fairness, and correct ourselves
487 if we ran off the end of the list.
488 - If we require CookieAuthentication but we fail to write the
489 cookie file, we would warn but not exit, and end up in a state
490 where no controller could authenticate. Now we exit.
491 - If we require CookieAuthentication, stop generating a new cookie
492 every time we change any piece of our config.
493 - Refuse to start with certain directory authority keys, and
494 encourage people using them to stop.
495 - Terminate multi-line control events properly. Original patch
497 - Fix a minor memory leak when we fail to find enough suitable
498 servers to choose a circuit.
499 - Stop leaking part of the descriptor when we run into a particularly
500 unparseable piece of it.
503 Changes in version 0.2.0.6-alpha - 2007-08-26
504 This sixth development snapshot features a new Vidalia version in the
505 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
506 the ControlPort in the default configuration, which addresses important
509 In addition, this snapshot fixes major load balancing problems
510 with path selection, which should speed things up a lot once many
511 people have upgraded. The directory authorities also use a new
512 mean-time-between-failure approach to tracking which servers are stable,
513 rather than just looking at the most recent uptime.
515 o New directory authorities:
516 - Set up Tonga as the default bridge directory authority.
519 - Directory authorities now track servers by weighted
520 mean-times-between-failures. When we have 4 or more days of data,
521 use measured MTBF rather than declared uptime to decide whether
522 to call a router Stable. Implements proposal 108.
524 o Major bugfixes (load balancing):
525 - When choosing nodes for non-guard positions, weight guards
526 proportionally less, since they already have enough load. Patch
528 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
529 will allow fast Tor servers to get more attention.
530 - When we're upgrading from an old Tor version, forget our current
531 guards and pick new ones according to the new weightings. These
532 three load balancing patches could raise effective network capacity
533 by a factor of four. Thanks to Mike Perry for measurements.
535 o Major bugfixes (descriptor parsing):
536 - Handle unexpected whitespace better in malformed descriptors. Bug
537 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
540 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
541 GETINFO for Torstat to use until it can switch to using extrainfos.
542 - Optionally (if built with -DEXPORTMALLINFO) export the output
543 of mallinfo via http, as tor/mallinfo.txt. Only accessible
547 - Do not intermix bridge routers with controller-added
548 routers. (Bugfix on 0.2.0.x)
549 - Do not fail with an assert when accept() returns an unexpected
550 address family. Addresses but does not wholly fix bug 483. (Bugfix
552 - Let directory authorities startup even when they can't generate
553 a descriptor immediately, e.g. because they don't know their
555 - Stop putting the authentication cookie in a file called "0"
556 in your working directory if you don't specify anything for the
557 new CookieAuthFile option. Reported by Matt Edman.
558 - Make it possible to read the PROTOCOLINFO response in a way that
559 conforms to our control-spec. Reported by Matt Edman.
560 - Fix a minor memory leak when we fail to find enough suitable
561 servers to choose a circuit. Bugfix on 0.1.2.x.
562 - Stop leaking part of the descriptor when we run into a particularly
563 unparseable piece of it. Bugfix on 0.1.2.x.
564 - Unmap the extrainfo cache file on exit.
567 Changes in version 0.2.0.5-alpha - 2007-08-19
568 This fifth development snapshot fixes compilation on Windows again;
569 fixes an obnoxious client-side bug that slowed things down and put
570 extra load on the network; gets us closer to using the v3 directory
571 voting scheme; makes it easier for Tor controllers to use cookie-based
572 authentication; and fixes a variety of other bugs.
575 - Version 1 directories are no longer generated in full. Instead,
576 authorities generate and serve "stub" v1 directories that list
577 no servers. This will stop Tor versions 0.1.0.x and earlier from
578 working, but (for security reasons) nobody should be running those
581 o Major bugfixes (compilation, 0.2.0.x):
582 - Try to fix Win32 compilation again: improve checking for IPv6 types.
583 - Try to fix MSVC compilation: build correctly on platforms that do
584 not define s6_addr16 or s6_addr32.
585 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
588 o Major bugfixes (stream expiration):
589 - Expire not-yet-successful application streams in all cases if
590 they've been around longer than SocksTimeout. Right now there are
591 some cases where the stream will live forever, demanding a new
592 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
595 o Minor features (directory servers):
596 - When somebody requests a list of statuses or servers, and we have
597 none of those, return a 404 rather than an empty 200.
599 o Minor features (directory voting):
600 - Store v3 consensus status consensuses on disk, and reload them
603 o Minor features (security):
604 - Warn about unsafe ControlPort configurations.
605 - Refuse to start with certain directory authority keys, and
606 encourage people using them to stop.
608 o Minor features (controller):
609 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
610 is valid before any authentication has been received. It tells
611 a controller what kind of authentication is expected, and what
612 protocol is spoken. Implements proposal 119.
613 - New config option CookieAuthFile to choose a new location for the
614 cookie authentication file, and config option
615 CookieAuthFileGroupReadable to make it group-readable.
617 o Minor features (unit testing):
618 - Add command-line arguments to unit-test executable so that we can
619 invoke any chosen test from the command line rather than having
620 to run the whole test suite at once; and so that we can turn on
621 logging for the unit tests.
623 o Minor bugfixes (on 0.1.2.x):
624 - If we require CookieAuthentication but we fail to write the
625 cookie file, we would warn but not exit, and end up in a state
626 where no controller could authenticate. Now we exit.
627 - If we require CookieAuthentication, stop generating a new cookie
628 every time we change any piece of our config.
629 - When loading bandwidth history, do not believe any information in
630 the future. Fixes bug 434.
631 - When loading entry guard information, do not believe any information
633 - When we have our clock set far in the future and generate an
634 onion key, then re-set our clock to be correct, we should not stop
635 the onion key from getting rotated.
636 - Clean up torrc sample config file.
637 - Do not automatically run configure from autogen.sh. This
638 non-standard behavior tended to annoy people who have built other
641 o Minor bugfixes (on 0.2.0.x):
642 - Fix a bug with AutomapHostsOnResolve that would always cause
643 the second request to fail. Bug reported by Kate. Bugfix on
645 - Fix a bug in ADDRMAP controller replies that would sometimes
646 try to print a NULL. Patch from tup.
647 - Read v3 directory authority keys from the right location.
648 - Numerous bugfixes to directory voting code.
651 Changes in version 0.1.2.16 - 2007-08-01
652 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
653 remote attacker in certain situations to rewrite the user's torrc
654 configuration file. This can completely compromise anonymity of users
655 in most configurations, including those running the Vidalia bundles,
658 o Major security fixes:
659 - Close immediately after missing authentication on control port;
660 do not allow multiple authentication attempts.
663 Changes in version 0.2.0.4-alpha - 2007-08-01
664 This fourth development snapshot fixes a critical security vulnerability
665 for most users, specifically those running Vidalia, TorK, etc. Everybody
666 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
668 o Major security fixes:
669 - Close immediately after missing authentication on control port;
670 do not allow multiple authentication attempts.
672 o Major bugfixes (compilation):
673 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
676 o Minor features (performance):
677 - Be even more aggressive about releasing RAM from small
678 empty buffers. Thanks to our free-list code, this shouldn't be too
679 performance-intensive.
680 - Disable sentinel-based debugging for buffer code: we squashed all
681 the bugs that this was supposed to detect a long time ago, and
682 now its only effect is to change our buffer sizes from nice
683 powers of two (which platform mallocs tend to like) to values
684 siightly over powers of two (which make some platform mallocs sad).
685 - Log malloc statistics from mallinfo() on platforms where it
689 Changes in version 0.2.0.3-alpha - 2007-07-29
690 This third development snapshot introduces new experimental
691 blocking-resistance features and a preliminary version of the v3
692 directory voting design, and includes many other smaller features
696 - The first pieces of our "bridge" design for blocking-resistance
697 are implemented. People can run bridge directory authorities;
698 people can run bridges; and people can configure their Tor clients
699 with a set of bridges to use as the first hop into the Tor network.
700 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
702 - Create listener connections before we setuid to the configured
703 User and Group. Now non-Windows users can choose port values
704 under 1024, start Tor as root, and have Tor bind those ports
705 before it changes to another UID. (Windows users could already
707 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
708 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
709 on "vserver" accounts. (Patch from coderman.)
710 - Be even more aggressive about separating local traffic from relayed
711 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
713 o Major features (experimental):
714 - First cut of code for "v3 dir voting": directory authorities will
715 vote on a common network status document rather than each publishing
716 their own opinion. This code needs more testing and more corner-case
717 handling before it's ready for use.
720 - Directory authorities now call routers Fast if their bandwidth is
721 at least 100KB/s, and consider their bandwidth adequate to be a
722 Guard if it is at least 250KB/s, no matter the medians. This fix
723 complements proposal 107. [Bugfix on 0.1.2.x]
724 - Directory authorities now never mark more than 3 servers per IP as
725 Valid and Running. (Implements proposal 109, by Kevin Bauer and
727 - Minor change to organizationName and commonName generation
728 procedures in TLS certificates during Tor handshakes, to invalidate
729 some earlier censorware approaches. This is not a long-term
730 solution, but applying it will give us a bit of time to look into
731 the epidemiology of countermeasures as they spread.
733 o Major bugfixes (directory):
734 - Rewrite directory tokenization code to never run off the end of
735 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
737 o Minor features (controller):
738 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
739 match requests to applications. (Patch from Robert Hogan.)
740 - Report address and port correctly on connections to DNSPort. (Patch
742 - Add a RESOLVE command to launch hostname lookups. (Original patch
744 - Add GETINFO status/enough-dir-info to let controllers tell whether
745 Tor has downloaded sufficient directory information. (Patch
747 - You can now use the ControlSocket option to tell Tor to listen for
748 controller connections on Unix domain sockets on systems that
749 support them. (Patch from Peter Palfrader.)
750 - STREAM NEW events are generated for DNSPort requests and for
751 tunneled directory connections. (Patch from Robert Hogan.)
752 - New "GETINFO address-mappings/*" command to get address mappings
753 with expiry information. "addr-mappings/*" is now deprecated.
756 o Minor features (misc):
757 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
759 - The tor-gencert tool for v3 directory authorities now creates all
760 files as readable to the file creator only, and write-protects
761 the authority identity key.
762 - When dumping memory usage, list bytes used in buffer memory
764 - When running with dmalloc, dump more stats on hup and on exit.
765 - Directory authorities now fail quickly and (relatively) harmlessly
766 if they generate a network status document that is somehow
769 o Traffic load balancing improvements:
770 - If exit bandwidth ever exceeds one third of total bandwidth, then
771 use the correct formula to weight exit nodes when choosing paths.
772 (Based on patch from Mike Perry.)
773 - Choose perfectly fairly among routers when choosing by bandwidth and
774 weighting by fraction of bandwidth provided by exits. Previously, we
775 would choose with only approximate fairness, and correct ourselves
776 if we ran off the end of the list. [Bugfix on 0.1.2.x]
778 o Performance improvements:
779 - Be more aggressive with freeing buffer RAM or putting it on the
781 - Use Critical Sections rather than Mutexes for synchronizing threads
782 on win32; Mutexes are heavier-weight, and designed for synchronizing
785 o Deprecated and removed features:
786 - RedirectExits is now deprecated.
787 - Stop allowing address masks that do not correspond to bit prefixes.
788 We have warned about these for a really long time; now it's time
789 to reject them. (Patch from croup.)
791 o Minor bugfixes (directory):
792 - Fix another crash bug related to extra-info caching. (Bug found by
793 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
794 - Directories no longer return a "304 not modified" when they don't
795 have the networkstatus the client asked for. Also fix a memory
796 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
797 - We had accidentally labelled 0.1.2.x directory servers as not
798 suitable for begin_dir requests, and had labelled no directory
799 servers as suitable for uploading extra-info documents. [Bugfix
802 o Minor bugfixes (dns):
803 - Fix a crash when DNSPort is set more than once. (Patch from Robert
804 Hogan.) [Bugfix on 0.2.0.2-alpha]
805 - Add DNSPort connections to the global connection list, so that we
806 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
808 - Fix a dangling reference that could lead to a crash when DNSPort is
809 changed or closed (Patch from Robert Hogan.) [Bugfix on
812 o Minor bugfixes (controller):
813 - Provide DNS expiry times in GMT, not in local time. For backward
814 compatibility, ADDRMAP events only provide GMT expiry in an extended
815 field. "GETINFO address-mappings" always does the right thing.
816 - Use CRLF line endings properly in NS events.
817 - Terminate multi-line control events properly. (Original patch
818 from tup.) [Bugfix on 0.1.2.x-alpha]
819 - Do not include spaces in SOURCE_ADDR fields in STREAM
820 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
823 Changes in version 0.1.2.15 - 2007-07-17
824 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
825 problems, fixes compilation on BSD, and fixes a variety of other
826 bugs. Everybody should upgrade.
828 o Major bugfixes (compilation):
829 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
831 o Major bugfixes (crashes):
832 - Try even harder not to dereference the first character after
833 an mmap(). Reported by lodger.
834 - Fix a crash bug in directory authorities when we re-number the
835 routerlist while inserting a new router.
836 - When the cached-routers file is an even multiple of the page size,
837 don't run off the end and crash. (Fixes bug 455; based on idea
839 - Fix eventdns.c behavior on Solaris: It is critical to include
840 orconfig.h _before_ sys/types.h, so that we can get the expected
841 definition of _FILE_OFFSET_BITS.
843 o Major bugfixes (security):
844 - Fix a possible buffer overrun when using BSD natd support. Bug
846 - When sending destroy cells from a circuit's origin, don't include
847 the reason for tearing down the circuit. The spec says we didn't,
848 and now we actually don't. Reported by lodger.
849 - Keep streamids from different exits on a circuit separate. This
850 bug may have allowed other routers on a given circuit to inject
851 cells into streams. Reported by lodger; fixes bug 446.
852 - If there's a never-before-connected-to guard node in our list,
853 never choose any guards past it. This way we don't expand our
854 guard list unless we need to.
856 o Minor bugfixes (guard nodes):
857 - Weight guard selection by bandwidth, so that low-bandwidth nodes
858 don't get overused as guards.
860 o Minor bugfixes (directory):
861 - Correctly count the number of authorities that recommend each
862 version. Previously, we were under-counting by 1.
863 - Fix a potential crash bug when we load many server descriptors at
864 once and some of them make others of them obsolete. Fixes bug 458.
866 o Minor bugfixes (hidden services):
867 - Stop tearing down the whole circuit when the user asks for a
868 connection to a port that the hidden service didn't configure.
871 o Minor bugfixes (misc):
872 - On Windows, we were preventing other processes from reading
873 cached-routers while Tor was running. Reported by janbar.
874 - Fix a possible (but very unlikely) bug in picking routers by
875 bandwidth. Add a log message to confirm that it is in fact
876 unlikely. Patch from lodger.
877 - Backport a couple of memory leak fixes.
878 - Backport miscellaneous cosmetic bugfixes.
881 Changes in version 0.2.0.2-alpha - 2007-06-02
882 o Major bugfixes on 0.2.0.1-alpha:
883 - Fix an assertion failure related to servers without extra-info digests.
884 Resolves bugs 441 and 442.
886 o Minor features (directory):
887 - Support "If-Modified-Since" when answering HTTP requests for
888 directories, running-routers documents, and network-status documents.
889 (There's no need to support it for router descriptors, since those
890 are downloaded by descriptor digest.)
892 o Minor build issues:
893 - Clear up some MIPSPro compiler warnings.
894 - When building from a tarball on a machine that happens to have SVK
895 installed, report the micro-revision as whatever version existed
896 in the tarball, not as "x".
899 Changes in version 0.2.0.1-alpha - 2007-06-01
900 This early development snapshot provides new features for people running
901 Tor as both a client and a server (check out the new RelayBandwidth
902 config options); lets Tor run as a DNS proxy; and generally moves us
903 forward on a lot of fronts.
905 o Major features, server usability:
906 - New config options RelayBandwidthRate and RelayBandwidthBurst:
907 a separate set of token buckets for relayed traffic. Right now
908 relayed traffic is defined as answers to directory requests, and
909 OR connections that don't have any local circuits on them.
911 o Major features, client usability:
912 - A client-side DNS proxy feature to replace the need for
913 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
914 for DNS requests on port 9999, use the Tor network to resolve them
915 anonymously, and send the reply back like a regular DNS server.
916 The code still only implements a subset of DNS.
917 - Make PreferTunneledDirConns and TunnelDirConns work even when
918 we have no cached directory info. This means Tor clients can now
919 do all of their connections protected by TLS.
921 o Major features, performance and efficiency:
922 - Directory authorities accept and serve "extra info" documents for
923 routers. These documents contain fields from router descriptors
924 that aren't usually needed, and that use a lot of excess
925 bandwidth. Once these fields are removed from router descriptors,
926 the bandwidth savings should be about 60%. [Partially implements
928 - Servers upload extra-info documents to any authority that accepts
929 them. Authorities (and caches that have been configured to download
930 extra-info documents) download them as needed. [Partially implements
932 - Change the way that Tor buffers data that it is waiting to write.
933 Instead of queueing data cells in an enormous ring buffer for each
934 client->OR or OR->OR connection, we now queue cells on a separate
935 queue for each circuit. This lets us use less slack memory, and
936 will eventually let us be smarter about prioritizing different kinds
938 - Use memory pools to allocate cells with better speed and memory
939 efficiency, especially on platforms where malloc() is inefficient.
940 - Stop reading on edge connections when their corresponding circuit
941 buffers are full; start again as the circuits empty out.
943 o Major features, other:
944 - Add an HSAuthorityRecordStats option that hidden service authorities
945 can use to track statistics of overall hidden service usage without
946 logging information that would be very useful to an attacker.
947 - Start work implementing multi-level keys for directory authorities:
948 Add a standalone tool to generate key certificates. (Proposal 103.)
951 - Directory authorities now call routers Stable if they have an
952 uptime of at least 30 days, even if that's not the median uptime
953 in the network. Implements proposal 107, suggested by Kevin Bauer
956 o Minor fixes (resource management):
957 - Count the number of open sockets separately from the number
958 of active connection_t objects. This will let us avoid underusing
959 our allocated connection limit.
960 - We no longer use socket pairs to link an edge connection to an
961 anonymous directory connection or a DirPort test connection.
962 Instead, we track the link internally and transfer the data
963 in-process. This saves two sockets per "linked" connection (at the
964 client and at the server), and avoids the nasty Windows socketpair()
966 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
967 for every single inactive connection_t. Free items from the
968 4k/16k-buffer free lists when they haven't been used for a while.
970 o Minor features (build):
971 - Make autoconf search for libevent, openssl, and zlib consistently.
972 - Update deprecated macros in configure.in.
973 - When warning about missing headers, tell the user to let us
974 know if the compile succeeds anyway, so we can downgrade the
976 - Include the current subversion revision as part of the version
977 string: either fetch it directly if we're in an SVN checkout, do
978 some magic to guess it if we're in an SVK checkout, or use
979 the last-detected version if we're building from a .tar.gz.
980 Use this version consistently in log messages.
982 o Minor features (logging):
983 - Always prepend "Bug: " to any log message about a bug.
984 - Put a platform string (e.g. "Linux i686") in the startup log
985 message, so when people paste just their logs, we know if it's
986 OpenBSD or Windows or what.
987 - When logging memory usage, break down memory used in buffers by
990 o Minor features (directory system):
991 - New config option V2AuthoritativeDirectory that all directory
992 authorities should set. This will let future authorities choose
993 not to serve V2 directory information.
994 - Directory authorities allow multiple router descriptors and/or extra
995 info documents to be uploaded in a single go. This will make
996 implementing proposal 104 simpler.
998 o Minor features (controller):
999 - Add a new config option __DisablePredictedCircuits designed for
1000 use by the controller, when we don't want Tor to build any circuits
1002 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
1003 so we can exit from the middle of the circuit.
1004 - Implement "getinfo status/circuit-established".
1005 - Implement "getinfo status/version/..." so a controller can tell
1006 whether the current version is recommended, and whether any versions
1007 are good, and how many authorities agree. (Patch from shibz.)
1009 o Minor features (hidden services):
1010 - Allow multiple HiddenServicePort directives with the same virtual
1011 port; when they occur, the user is sent round-robin to one
1012 of the target ports chosen at random. Partially fixes bug 393 by
1013 adding limited ad-hoc round-robining.
1015 o Minor features (other):
1017 - Add a new AutomapHostsOnResolve option: when it is enabled, any
1018 resolve request for hosts matching a given pattern causes Tor to
1019 generate an internal virtual address mapping for that host. This
1020 allows DNSPort to work sensibly with hidden service users. By
1021 default, .exit and .onion addresses are remapped; the list of
1022 patterns can be reconfigured with AutomapHostsSuffixes.
1023 - Add an "-F" option to tor-resolve to force a resolve for a .onion
1024 address. Thanks to the AutomapHostsOnResolve option, this is no
1025 longer a completely silly thing to do.
1026 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
1027 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
1028 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
1029 minus 1 byte: the actual maximum declared bandwidth.
1032 - Removed support for the old binary "version 0" controller protocol.
1033 This has been deprecated since 0.1.1, and warnings have been issued
1034 since 0.1.2. When we encounter a v0 control message, we now send
1035 back an error and close the connection.
1036 - Remove the old "dns worker" server DNS code: it hasn't been default
1037 since 0.1.2.2-alpha, and all the servers seem to be using the new
1040 o Minor bugfixes (portability):
1041 - Even though Windows is equally happy with / and \ as path separators,
1042 try to use \ consistently on Windows and / consistently on Unix: it
1043 makes the log messages nicer.
1044 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
1045 - Read resolv.conf files correctly on platforms where read() returns
1046 partial results on small file reads.
1048 o Minor bugfixes (directory):
1049 - Correctly enforce that elements of directory objects do not appear
1050 more often than they are allowed to appear.
1051 - When we are reporting the DirServer line we just parsed, we were
1052 logging the second stanza of the key fingerprint, not the first.
1054 o Minor bugfixes (logging):
1055 - When we hit an EOF on a log (probably because we're shutting down),
1056 don't try to remove the log from the list: just mark it as
1057 unusable. (Bulletproofs against bug 222.)
1059 o Minor bugfixes (other):
1060 - In the exitlist script, only consider the most recently published
1061 server descriptor for each server. Also, when the user requests
1062 a list of servers that _reject_ connections to a given address,
1063 explicitly exclude the IPs that also have servers that accept
1064 connections to that address. (Resolves bug 405.)
1065 - Stop allowing hibernating servers to be "stable" or "fast".
1066 - On Windows, we were preventing other processes from reading
1067 cached-routers while Tor was running. (Reported by janbar)
1068 - Make the NodeFamilies config option work. (Reported by
1069 lodger -- it has never actually worked, even though we added it
1071 - Check return values from pthread_mutex functions.
1072 - Don't save non-general-purpose router descriptors to the disk cache,
1073 because we have no way of remembering what their purpose was when
1075 - Add even more asserts to hunt down bug 417.
1076 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
1077 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
1078 Add a log message to confirm that it is in fact unlikely.
1080 o Minor bugfixes (controller):
1081 - Make 'getinfo fingerprint' return a 551 error if we're not a
1082 server, so we match what the control spec claims we do. Reported
1084 - Fix a typo in an error message when extendcircuit fails that
1085 caused us to not follow the \r\n-based delimiter protocol. Reported
1088 o Code simplifications and refactoring:
1089 - Stop passing around circuit_t and crypt_path_t pointers that are
1090 implicit in other procedure arguments.
1091 - Drop the old code to choke directory connections when the
1092 corresponding OR connections got full: thanks to the cell queue
1093 feature, OR conns don't get full any more.
1094 - Make dns_resolve() handle attaching connections to circuits
1095 properly, so the caller doesn't have to.
1096 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
1097 - Keep the connection array as a dynamic smartlist_t, rather than as
1098 a fixed-sized array. This is important, as the number of connections
1099 is becoming increasingly decoupled from the number of sockets.
1102 Changes in version 0.1.2.14 - 2007-05-25
1103 Tor 0.1.2.14 changes the addresses of two directory authorities (this
1104 change especially affects those who serve or use hidden services),
1105 and fixes several other crash- and security-related bugs.
1107 o Directory authority changes:
1108 - Two directory authorities (moria1 and moria2) just moved to new
1109 IP addresses. This change will particularly affect those who serve
1110 or use hidden services.
1112 o Major bugfixes (crashes):
1113 - If a directory server runs out of space in the connection table
1114 as it's processing a begin_dir request, it will free the exit stream
1115 but leave it attached to the circuit, leading to unpredictable
1116 behavior. (Reported by seeess, fixes bug 425.)
1117 - Fix a bug in dirserv_remove_invalid() that would cause authorities
1118 to corrupt memory under some really unlikely scenarios.
1119 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
1120 - Avoid segfaults when reading from mmaped descriptor file. (Reported
1123 o Major bugfixes (security):
1124 - When choosing an entry guard for a circuit, avoid using guards
1125 that are in the same family as the chosen exit -- not just guards
1126 that are exactly the chosen exit. (Reported by lodger.)
1128 o Major bugfixes (resource management):
1129 - If a directory authority is down, skip it when deciding where to get
1130 networkstatus objects or descriptors. Otherwise we keep asking
1131 every 10 seconds forever. Fixes bug 384.
1132 - Count it as a failure if we fetch a valid network-status but we
1133 don't want to keep it. Otherwise we'll keep fetching it and keep
1134 not wanting to keep it. Fixes part of bug 422.
1135 - If all of our dirservers have given us bad or no networkstatuses
1136 lately, then stop hammering them once per minute even when we
1137 think they're failed. Fixes another part of bug 422.
1140 - Actually set the purpose correctly for descriptors inserted with
1142 - When we have k non-v2 authorities in our DirServer config,
1143 we ignored the last k authorities in the list when updating our
1145 - Correctly back-off from requesting router descriptors that we are
1146 having a hard time downloading.
1147 - Read resolv.conf files correctly on platforms where read() returns
1148 partial results on small file reads.
1149 - Don't rebuild the entire router store every time we get 32K of
1150 routers: rebuild it when the journal gets very large, or when
1151 the gaps in the store get very large.
1154 - When routers publish SVN revisions in their router descriptors,
1155 authorities now include those versions correctly in networkstatus
1157 - Warn when using a version of libevent before 1.3b to run a server on
1158 OSX or BSD: these versions interact badly with userspace threads.
1161 Changes in version 0.1.2.13 - 2007-04-24
1162 This release features some major anonymity fixes, such as safer path
1163 selection; better client performance; faster bootstrapping, better
1164 address detection, and better DNS support for servers; write limiting as
1165 well as read limiting to make servers easier to run; and a huge pile of
1166 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
1168 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
1169 of the Freenode IRC network, remembering his patience and vision for
1170 free speech on the Internet.
1173 - Fix a memory leak when we ask for "all" networkstatuses and we
1174 get one we don't recognize.
1175 - Add more asserts to hunt down bug 417.
1176 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
1179 Changes in version 0.1.2.12-rc - 2007-03-16
1181 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
1182 directory information requested inside Tor connections (i.e. via
1183 begin_dir cells). It only triggered when the same connection was
1184 serving other data at the same time. Reported by seeess.
1187 - When creating a circuit via the controller, send a 'launched'
1188 event when we're done, so we follow the spec better.
1191 Changes in version 0.1.2.11-rc - 2007-03-15
1192 o Minor bugfixes (controller), reported by daejees:
1193 - Correct the control spec to match how the code actually responds
1194 to 'getinfo addr-mappings/*'.
1195 - The control spec described a GUARDS event, but the code
1196 implemented a GUARD event. Standardize on GUARD, but let people
1200 Changes in version 0.1.2.10-rc - 2007-03-07
1201 o Major bugfixes (Windows):
1202 - Do not load the NT services library functions (which may not exist)
1203 just to detect if we're a service trying to shut down. Now we run
1204 on Win98 and friends again.
1206 o Minor bugfixes (other):
1207 - Clarify a couple of log messages.
1208 - Fix a misleading socks5 error number.
1211 Changes in version 0.1.2.9-rc - 2007-03-02
1212 o Major bugfixes (Windows):
1213 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
1214 of the usual GCC "%llu". This prevents a bug when saving 64-bit
1215 int configuration values: the high-order 32 bits would get
1216 truncated. In particular, we were being bitten by the default
1217 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
1218 and maybe also bug 397.)
1220 o Minor bugfixes (performance):
1221 - Use OpenSSL's AES implementation on platforms where it's faster.
1222 This could save us as much as 10% CPU usage.
1224 o Minor bugfixes (server):
1225 - Do not rotate onion key immediately after setting it for the first
1228 o Minor bugfixes (directory authorities):
1229 - Stop calling servers that have been hibernating for a long time
1230 "stable". Also, stop letting hibernating or obsolete servers affect
1231 uptime and bandwidth cutoffs.
1232 - Stop listing hibernating servers in the v1 directory.
1234 o Minor bugfixes (hidden services):
1235 - Upload hidden service descriptors slightly less often, to reduce
1236 load on authorities.
1238 o Minor bugfixes (other):
1239 - Fix an assert that could trigger if a controller quickly set then
1240 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
1241 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
1243 - Fix a potential race condition in the rpm installer. Found by
1245 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
1246 of 2 as indicating that the server is completely bad; it sometimes
1247 means that the server is just bad for the request in question. (may fix
1248 the last of bug 326.)
1249 - Disable encrypted directory connections when we don't have a server
1250 descriptor for the destination. We'll get this working again in
1254 Changes in version 0.1.2.8-beta - 2007-02-26
1255 o Major bugfixes (crashes):
1256 - Stop crashing when the controller asks us to resetconf more than
1257 one config option at once. (Vidalia 0.0.11 does this.)
1258 - Fix a crash that happened on Win98 when we're given command-line
1259 arguments: don't try to load NT service functions from advapi32.dll
1260 except when we need them. (Bug introduced in 0.1.2.7-alpha;
1262 - Fix a longstanding obscure crash bug that could occur when
1263 we run out of DNS worker processes. (Resolves bug 390.)
1265 o Major bugfixes (hidden services):
1266 - Correctly detect whether hidden service descriptor downloads are
1267 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
1269 o Major bugfixes (accounting):
1270 - When we start during an accounting interval before it's time to wake
1271 up, remember to wake up at the correct time. (May fix bug 342.)
1273 o Minor bugfixes (controller):
1274 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
1275 clear the corresponding on_circuit variable, and remember later
1276 that we don't need to send a redundant CLOSED event. (Resolves part
1278 - Report events where a resolve succeeded or where we got a socks
1279 protocol error correctly, rather than calling both of them
1281 - Change reported stream target addresses to IP consistently when
1282 we finally get the IP from an exit node.
1283 - Send log messages to the controller even if they happen to be very
1286 o Minor bugfixes (other):
1287 - Display correct results when reporting which versions are
1288 recommended, and how recommended they are. (Resolves bug 383.)
1289 - Improve our estimates for directory bandwidth to be less random:
1290 guess that an unrecognized directory will have the average bandwidth
1291 from all known directories, not that it will have the average
1292 bandwidth from those directories earlier than it on the list.
1293 - If we start a server with ClientOnly 1, then set ClientOnly to 0
1294 and hup, stop triggering an assert based on an empty onion_key.
1295 - On platforms with no working mmap() equivalent, don't warn the
1296 user when cached-routers doesn't exist.
1297 - Warn the user when mmap() [or its equivalent] fails for some reason
1298 other than file-not-found.
1299 - Don't warn the user when cached-routers.new doesn't exist: that's
1300 perfectly fine when starting up for the first time.
1301 - When EntryNodes are configured, rebuild the guard list to contain,
1302 in order: the EntryNodes that were guards before; the rest of the
1303 EntryNodes; the nodes that were guards before.
1304 - Mask out all signals in sub-threads; only the libevent signal
1305 handler should be processing them. This should prevent some crashes
1306 on some machines using pthreads. (Patch from coderman.)
1307 - Fix switched arguments on memset in the implementation of
1308 tor_munmap() for systems with no mmap() call.
1309 - When Tor receives a router descriptor that it asked for, but
1310 no longer wants (because it has received fresh networkstatuses
1311 in the meantime), do not warn the user. Cache the descriptor if
1312 we're a cache; drop it if we aren't.
1313 - Make earlier entry guards _really_ get retried when the network
1315 - On a malformed DNS reply, always give an error to the corresponding
1317 - Build with recent libevents on platforms that do not define the
1318 nonstandard types "u_int8_t" and friends.
1320 o Minor features (controller):
1321 - Warn the user when an application uses the obsolete binary v0
1322 control protocol. We're planning to remove support for it during
1323 the next development series, so it's good to give people some
1325 - Add STREAM_BW events to report per-entry-stream bandwidth
1326 use. (Patch from Robert Hogan.)
1327 - Rate-limit SIGNEWNYM signals in response to controllers that
1328 impolitely generate them for every single stream. (Patch from
1329 mwenge; closes bug 394.)
1330 - Make REMAP stream events have a SOURCE (cache or exit), and
1331 make them generated in every case where we get a successful
1332 connected or resolved cell.
1334 o Minor bugfixes (performance):
1335 - Call router_have_min_dir_info half as often. (This is showing up in
1336 some profiles, but not others.)
1337 - When using GCC, make log_debug never get called at all, and its
1338 arguments never get evaluated, when no debug logs are configured.
1339 (This is showing up in some profiles, but not others.)
1342 - Remove some never-implemented options. Mark PathlenCoinWeight as
1344 - Implement proposal 106: Stop requiring clients to have well-formed
1345 certificates; stop checking nicknames in certificates. (Clients
1346 have certificates so that they can look like Tor servers, but in
1347 the future we might want to allow them to look like regular TLS
1348 clients instead. Nicknames in certificates serve no purpose other
1349 than making our protocol easier to recognize on the wire.)
1350 - Revise messages on handshake failure again to be even more clear about
1351 which are incoming connections and which are outgoing.
1352 - Discard any v1 directory info that's over 1 month old (for
1353 directories) or over 1 week old (for running-routers lists).
1354 - Do not warn when individual nodes in the configuration's EntryNodes,
1355 ExitNodes, etc are down: warn only when all possible nodes
1356 are down. (Fixes bug 348.)
1357 - Always remove expired routers and networkstatus docs before checking
1358 whether we have enough information to build circuits. (Fixes
1360 - Put a lower-bound on MaxAdvertisedBandwidth.
1363 Changes in version 0.1.2.7-alpha - 2007-02-06
1364 o Major bugfixes (rate limiting):
1365 - Servers decline directory requests much more aggressively when
1366 they're low on bandwidth. Otherwise they end up queueing more and
1367 more directory responses, which can't be good for latency.
1368 - But never refuse directory requests from local addresses.
1369 - Fix a memory leak when sending a 503 response for a networkstatus
1371 - Be willing to read or write on local connections (e.g. controller
1372 connections) even when the global rate limiting buckets are empty.
1373 - If our system clock jumps back in time, don't publish a negative
1374 uptime in the descriptor. Also, don't let the global rate limiting
1375 buckets go absurdly negative.
1376 - Flush local controller connection buffers periodically as we're
1377 writing to them, so we avoid queueing 4+ megabytes of data before
1380 o Major bugfixes (NT services):
1381 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
1382 command-line flag so that admins can override the default by saying
1383 "tor --service install --user "SomeUser"". This will not affect
1384 existing installed services. Also, warn the user that the service
1385 will look for its configuration file in the service user's
1386 %appdata% directory. (We can't do the 'hardwire the user's appdata
1387 directory' trick any more, since we may not have read access to that
1390 o Major bugfixes (other):
1391 - Previously, we would cache up to 16 old networkstatus documents
1392 indefinitely, if they came from nontrusted authorities. Now we
1393 discard them if they are more than 10 days old.
1394 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
1396 - Detect and reject malformed DNS responses containing circular
1398 - If exits are rare enough that we're not marking exits as guards,
1399 ignore exit bandwidth when we're deciding the required bandwidth
1401 - When we're handling a directory connection tunneled over Tor,
1402 don't fill up internal memory buffers with all the data we want
1403 to tunnel; instead, only add it if the OR connection that will
1404 eventually receive it has some room for it. (This can lead to
1405 slowdowns in tunneled dir connections; a better solution will have
1408 o Minor bugfixes (dns):
1409 - Add some defensive programming to eventdns.c in an attempt to catch
1410 possible memory-stomping bugs.
1411 - Detect and reject DNS replies containing IPv4 or IPv6 records with
1412 an incorrect number of bytes. (Previously, we would ignore the
1414 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
1415 in the correct order, and doesn't crash.
1416 - Free memory held in recently-completed DNS lookup attempts on exit.
1417 This was not a memory leak, but may have been hiding memory leaks.
1418 - Handle TTL values correctly on reverse DNS lookups.
1419 - Treat failure to parse resolv.conf as an error.
1421 o Minor bugfixes (other):
1422 - Fix crash with "tor --list-fingerprint" (reported by seeess).
1423 - When computing clock skew from directory HTTP headers, consider what
1424 time it was when we finished asking for the directory, not what
1426 - Expire socks connections if they spend too long waiting for the
1427 handshake to finish. Previously we would let them sit around for
1428 days, if the connecting application didn't close them either.
1429 - And if the socks handshake hasn't started, don't send a
1430 "DNS resolve socks failed" handshake reply; just close it.
1431 - Stop using C functions that OpenBSD's linker doesn't like.
1432 - Don't launch requests for descriptors unless we have networkstatuses
1433 from at least half of the authorities. This delays the first
1434 download slightly under pathological circumstances, but can prevent
1435 us from downloading a bunch of descriptors we don't need.
1436 - Do not log IPs with TLS failures for incoming TLS
1437 connections. (Fixes bug 382.)
1438 - If the user asks to use invalid exit nodes, be willing to use
1440 - Stop using the reserved ac_cv namespace in our configure script.
1441 - Call stat() slightly less often; use fstat() when possible.
1442 - Refactor the way we handle pending circuits when an OR connection
1443 completes or fails, in an attempt to fix a rare crash bug.
1444 - Only rewrite a conn's address based on X-Forwarded-For: headers
1445 if it's a parseable public IP address; and stop adding extra quotes
1446 to the resulting address.
1449 - Weight directory requests by advertised bandwidth. Now we can
1450 let servers enable write limiting but still allow most clients to
1451 succeed at their directory requests. (We still ignore weights when
1452 choosing a directory authority; I hope this is a feature.)
1455 - Create a new file ReleaseNotes which was the old ChangeLog. The
1456 new ChangeLog file now includes the summaries for all development
1458 - Check for addresses with invalid characters at the exit as well
1459 as at the client, and warn less verbosely when they fail. You can
1460 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
1461 - Adapt a patch from goodell to let the contrib/exitlist script
1462 take arguments rather than require direct editing.
1463 - Inform the server operator when we decide not to advertise a
1464 DirPort due to AccountingMax enabled or a low BandwidthRate. It
1465 was confusing Zax, so now we're hopefully more helpful.
1466 - Bring us one step closer to being able to establish an encrypted
1467 directory tunnel without knowing a descriptor first. Still not
1468 ready yet. As part of the change, now assume we can use a
1469 create_fast cell if we don't know anything about a router.
1470 - Allow exit nodes to use nameservers running on ports other than 53.
1471 - Servers now cache reverse DNS replies.
1472 - Add an --ignore-missing-torrc command-line option so that we can
1473 get the "use sensible defaults if the configuration file doesn't
1474 exist" behavior even when specifying a torrc location on the command
1477 o Minor features (controller):
1478 - Track reasons for OR connection failure; make these reasons
1479 available via the controller interface. (Patch from Mike Perry.)
1480 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
1481 can learn when clients are sending malformed hostnames to Tor.
1482 - Clean up documentation for controller status events.
1483 - Add a REMAP status to stream events to note that a stream's
1484 address has changed because of a cached address or a MapAddress
1488 Changes in version 0.1.2.6-alpha - 2007-01-09
1490 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
1491 connection handles more than 4 gigs in either direction, we crash.
1492 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
1493 advertised exit node, somebody might try to exit from us when
1494 we're bootstrapping and before we've built our descriptor yet.
1495 Refuse the connection rather than crashing.
1498 - Warn if we (as a server) find that we've resolved an address that we
1499 weren't planning to resolve.
1500 - Warn that using select() on any libevent version before 1.1 will be
1501 unnecessarily slow (even for select()).
1502 - Flush ERR-level controller status events just like we currently
1503 flush ERR-level log events, so that a Tor shutdown doesn't prevent
1504 the controller from learning about current events.
1506 o Minor features (more controller status events):
1507 - Implement EXTERNAL_ADDRESS server status event so controllers can
1508 learn when our address changes.
1509 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
1510 can learn when directories reject our descriptor.
1511 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
1512 can learn when a client application is speaking a non-socks protocol
1514 - Implement DANGEROUS_SOCKS client status event so controllers
1515 can learn when a client application is leaking DNS addresses.
1516 - Implement BUG general status event so controllers can learn when
1517 Tor is unhappy about its internal invariants.
1518 - Implement CLOCK_SKEW general status event so controllers can learn
1519 when Tor thinks the system clock is set incorrectly.
1520 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
1521 server status events so controllers can learn when their descriptors
1522 are accepted by a directory.
1523 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
1524 server status events so controllers can learn about Tor's progress in
1525 deciding whether it's reachable from the outside.
1526 - Implement BAD_LIBEVENT general status event so controllers can learn
1527 when we have a version/method combination in libevent that needs to
1529 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
1530 and DNS_USELESS server status events so controllers can learn
1531 about changes to DNS server status.
1533 o Minor features (directory):
1534 - Authorities no longer recommend exits as guards if this would shift
1535 too much load to the exit nodes.
1538 Changes in version 0.1.2.5-alpha - 2007-01-06
1540 - Enable write limiting as well as read limiting. Now we sacrifice
1541 capacity if we're pushing out lots of directory traffic, rather
1542 than overrunning the user's intended bandwidth limits.
1543 - Include TLS overhead when counting bandwidth usage; previously, we
1544 would count only the bytes sent over TLS, but not the bytes used
1546 - Support running the Tor service with a torrc not in the same
1547 directory as tor.exe and default to using the torrc located in
1548 the %appdata%\Tor\ of the user who installed the service. Patch
1550 - Servers now check for the case when common DNS requests are going to
1551 wildcarded addresses (i.e. all getting the same answer), and change
1552 their exit policy to reject *:* if it's happening.
1553 - Implement BEGIN_DIR cells, so we can connect to the directory
1554 server via TLS to do encrypted directory requests rather than
1555 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
1556 config options if you like.
1558 o Minor features (config and docs):
1559 - Start using the state file to store bandwidth accounting data:
1560 the bw_accounting file is now obsolete. We'll keep generating it
1561 for a while for people who are still using 0.1.2.4-alpha.
1562 - Try to batch changes to the state file so that we do as few
1563 disk writes as possible while still storing important things in
1565 - The state file and the bw_accounting file get saved less often when
1566 the AvoidDiskWrites config option is set.
1567 - Make PIDFile work on Windows (untested).
1568 - Add internal descriptions for a bunch of configuration options:
1569 accessible via controller interface and in comments in saved
1571 - Reject *:563 (NNTPS) in the default exit policy. We already reject
1572 NNTP by default, so this seems like a sensible addition.
1573 - Clients now reject hostnames with invalid characters. This should
1574 avoid some inadvertent info leaks. Add an option
1575 AllowNonRFC953Hostnames to disable this behavior, in case somebody
1576 is running a private network with hosts called @, !, and #.
1577 - Add a maintainer script to tell us which options are missing
1578 documentation: "make check-docs".
1579 - Add a new address-spec.txt document to describe our special-case
1580 addresses: .exit, .onion, and .noconnnect.
1582 o Minor features (DNS):
1583 - Ongoing work on eventdns infrastructure: now it has dns server
1584 and ipv6 support. One day Tor will make use of it.
1585 - Add client-side caching for reverse DNS lookups.
1586 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
1587 - When we change nameservers or IP addresses, reset and re-launch
1588 our tests for DNS hijacking.
1590 o Minor features (directory):
1591 - Authorities now specify server versions in networkstatus. This adds
1592 about 2% to the size of compressed networkstatus docs, and allows
1593 clients to tell which servers support BEGIN_DIR and which don't.
1594 The implementation is forward-compatible with a proposed future
1595 protocol version scheme not tied to Tor versions.
1596 - DirServer configuration lines now have an orport= option so
1597 clients can open encrypted tunnels to the authorities without
1598 having downloaded their descriptors yet. Enabled for moria1,
1599 moria2, tor26, and lefkada now in the default configuration.
1600 - Directory servers are more willing to send a 503 "busy" if they
1601 are near their write limit, especially for v1 directory requests.
1602 Now they can use their limited bandwidth for actual Tor traffic.
1603 - Clients track responses with status 503 from dirservers. After a
1604 dirserver has given us a 503, we try not to use it until an hour has
1605 gone by, or until we have no dirservers that haven't given us a 503.
1606 - When we get a 503 from a directory, and we're not a server, we don't
1607 count the failure against the total number of failures allowed
1608 for the thing we're trying to download.
1609 - Report X-Your-Address-Is correctly from tunneled directory
1610 connections; don't report X-Your-Address-Is when it's an internal
1611 address; and never believe reported remote addresses when they're
1613 - Protect against an unlikely DoS attack on directory servers.
1614 - Add a BadDirectory flag to network status docs so that authorities
1615 can (eventually) tell clients about caches they believe to be
1618 o Minor features (controller):
1619 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
1620 - Reimplement GETINFO so that info/names stays in sync with the
1622 - Implement "GETINFO fingerprint".
1623 - Implement "SETEVENTS GUARD" so controllers can get updates on
1624 entry guard status as it changes.
1626 o Minor features (clean up obsolete pieces):
1627 - Remove some options that have been deprecated since at least
1628 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
1629 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
1631 - We no longer look for identity and onion keys in "identity.key" and
1632 "onion.key" -- these were replaced by secret_id_key and
1633 secret_onion_key in 0.0.8pre1.
1634 - We no longer require unrecognized directory entries to be
1637 o Major bugfixes (security):
1638 - Stop sending the HttpProxyAuthenticator string to directory
1639 servers when directory connections are tunnelled through Tor.
1640 - Clients no longer store bandwidth history in the state file.
1641 - Do not log introduction points for hidden services if SafeLogging
1643 - When generating bandwidth history, round down to the nearest
1644 1k. When storing accounting data, round up to the nearest 1k.
1645 - When we're running as a server, remember when we last rotated onion
1646 keys, so that we will rotate keys once they're a week old even if
1647 we never stay up for a week ourselves.
1649 o Major bugfixes (other):
1650 - Fix a longstanding bug in eventdns that prevented the count of
1651 timed-out resolves from ever being reset. This bug caused us to
1652 give up on a nameserver the third time it timed out, and try it
1653 10 seconds later... and to give up on it every time it timed out
1655 - Take out the '5 second' timeout from the connection retry
1656 schedule. Now the first connect attempt will wait a full 10
1657 seconds before switching to a new circuit. Perhaps this will help
1658 a lot. Based on observations from Mike Perry.
1659 - Fix a bug on the Windows implementation of tor_mmap_file() that
1660 would prevent the cached-routers file from ever loading. Reported
1664 - Fix an assert failure when a directory authority sets
1665 AuthDirRejectUnlisted and then receives a descriptor from an
1666 unlisted router. Reported by seeess.
1667 - Avoid a double-free when parsing malformed DirServer lines.
1668 - Fix a bug when a BSD-style PF socket is first used. Patch from
1670 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
1671 to resolve an address at a given exit node even when they ask for
1673 - Servers no longer ever list themselves in their "family" line,
1674 even if configured to do so. This makes it easier to configure
1675 family lists conveniently.
1676 - When running as a server, don't fall back to 127.0.0.1 when no
1677 nameservers are configured in /etc/resolv.conf; instead, make the
1678 user fix resolv.conf or specify nameservers explicitly. (Resolves
1680 - Stop accepting certain malformed ports in configured exit policies.
1681 - Don't re-write the fingerprint file every restart, unless it has
1683 - Stop warning when a single nameserver fails: only warn when _all_ of
1684 our nameservers have failed. Also, when we only have one nameserver,
1685 raise the threshold for deciding that the nameserver is dead.
1686 - Directory authorities now only decide that routers are reachable
1687 if their identity keys are as expected.
1688 - When the user uses bad syntax in the Log config line, stop
1689 suggesting other bad syntax as a replacement.
1690 - Correctly detect ipv6 DNS capability on OpenBSD.
1692 o Minor bugfixes (controller):
1693 - Report the circuit number correctly in STREAM CLOSED events. Bug
1694 reported by Mike Perry.
1695 - Do not report bizarre values for results of accounting GETINFOs
1696 when the last second's write or read exceeds the allotted bandwidth.
1697 - Report "unrecognized key" rather than an empty string when the
1698 controller tries to fetch a networkstatus that doesn't exist.
1701 Changes in version 0.1.1.26 - 2006-12-14
1702 o Security bugfixes:
1703 - Stop sending the HttpProxyAuthenticator string to directory
1704 servers when directory connections are tunnelled through Tor.
1705 - Clients no longer store bandwidth history in the state file.
1706 - Do not log introduction points for hidden services if SafeLogging
1710 - Fix an assert failure when a directory authority sets
1711 AuthDirRejectUnlisted and then receives a descriptor from an
1712 unlisted router (reported by seeess).
1715 Changes in version 0.1.2.4-alpha - 2006-12-03
1717 - Add support for using natd; this allows FreeBSDs earlier than
1718 5.1.2 to have ipfw send connections through Tor without using
1719 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
1722 - Make all connections to addresses of the form ".noconnect"
1723 immediately get closed. This lets application/controller combos
1724 successfully test whether they're talking to the same Tor by
1725 watching for STREAM events.
1726 - Make cross.sh cross-compilation script work even when autogen.sh
1727 hasn't been run. (Patch from Michael Mohr.)
1728 - Statistics dumped by -USR2 now include a breakdown of public key
1729 operations, for profiling.
1732 - Fix a major leak when directory authorities parse their
1733 approved-routers list, a minor memory leak when we fail to pick
1734 an exit node, and a few rare leaks on errors.
1735 - Handle TransPort connections even when the server sends data before
1736 the client sends data. Previously, the connection would just hang
1737 until the client sent data. (Patch from tup based on patch from
1739 - Avoid assert failure when our cached-routers file is empty on
1743 - Don't log spurious warnings when we see a circuit close reason we
1744 don't recognize; it's probably just from a newer version of Tor.
1745 - Have directory authorities allow larger amounts of drift in uptime
1746 without replacing the server descriptor: previously, a server that
1747 restarted every 30 minutes could have 48 "interesting" descriptors
1749 - Start linking to the Tor specification and Tor reference manual
1750 correctly in the Windows installer.
1751 - Add Vidalia to the OS X uninstaller script, so when we uninstall
1752 Tor/Privoxy we also uninstall Vidalia.
1753 - Resume building on Irix64, and fix a lot of warnings from its
1755 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
1756 when we're running as a client.
1759 Changes in version 0.1.1.25 - 2006-11-04
1761 - When a client asks us to resolve (rather than connect to)
1762 an address, and we have a cached answer, give them the cached
1763 answer. Previously, we would give them no answer at all.
1764 - We were building exactly the wrong circuits when we predict
1765 hidden service requirements, meaning Tor would have to build all
1766 its circuits on demand.
1767 - If none of our live entry guards have a high uptime, but we
1768 require a guard with a high uptime, try adding a new guard before
1769 we give up on the requirement. This patch should make long-lived
1770 connections more stable on average.
1771 - When testing reachability of our DirPort, don't launch new
1772 tests when there's already one in progress -- unreachable
1773 servers were stacking up dozens of testing streams.
1775 o Security bugfixes:
1776 - When the user sends a NEWNYM signal, clear the client-side DNS
1777 cache too. Otherwise we continue to act on previous information.
1780 - Avoid a memory corruption bug when creating a hash table for
1782 - Avoid possibility of controller-triggered crash when misusing
1783 certain commands from a v0 controller on platforms that do not
1784 handle printf("%s",NULL) gracefully.
1785 - Avoid infinite loop on unexpected controller input.
1786 - Don't log spurious warnings when we see a circuit close reason we
1787 don't recognize; it's probably just from a newer version of Tor.
1788 - Add Vidalia to the OS X uninstaller script, so when we uninstall
1789 Tor/Privoxy we also uninstall Vidalia.
1792 Changes in version 0.1.2.3-alpha - 2006-10-29
1794 - Prepare for servers to publish descriptors less often: never
1795 discard a descriptor simply for being too old until either it is
1796 recommended by no authorities, or until we get a better one for
1797 the same router. Make caches consider retaining old recommended
1798 routers for even longer.
1799 - If most authorities set a BadExit flag for a server, clients
1800 don't think of it as a general-purpose exit. Clients only consider
1801 authorities that advertise themselves as listing bad exits.
1802 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
1803 headers for content, so that we can work better in the presence of
1804 caching HTTP proxies.
1805 - Allow authorities to list nodes as bad exits by fingerprint or by
1808 o Minor features, controller:
1809 - Add a REASON field to CIRC events; for backward compatibility, this
1810 field is sent only to controllers that have enabled the extended
1811 event format. Also, add additional reason codes to explain why
1812 a given circuit has been destroyed or truncated. (Patches from
1814 - Add a REMOTE_REASON field to extended CIRC events to tell the
1815 controller about why a remote OR told us to close a circuit.
1816 - Stream events also now have REASON and REMOTE_REASON fields,
1817 working much like those for circuit events.
1818 - There's now a GETINFO ns/... field so that controllers can ask Tor
1819 about the current status of a router.
1820 - A new event type "NS" to inform a controller when our opinion of
1821 a router's status has changed.
1822 - Add a GETINFO events/names and GETINFO features/names so controllers
1823 can tell which events and features are supported.
1824 - A new CLEARDNSCACHE signal to allow controllers to clear the
1825 client-side DNS cache without expiring circuits.
1827 o Security bugfixes:
1828 - When the user sends a NEWNYM signal, clear the client-side DNS
1829 cache too. Otherwise we continue to act on previous information.
1832 - Avoid sending junk to controllers or segfaulting when a controller
1833 uses EVENT_NEW_DESC with verbose nicknames.
1834 - Stop triggering asserts if the controller tries to extend hidden
1835 service circuits (reported by mwenge).
1836 - Avoid infinite loop on unexpected controller input.
1837 - When the controller does a "GETINFO network-status", tell it
1838 about even those routers whose descriptors are very old, and use
1839 long nicknames where appropriate.
1840 - Change NT service functions to be loaded on demand. This lets us
1841 build with MinGW without breaking Tor for Windows 98 users.
1842 - Do DirPort reachability tests less often, since a single test
1843 chews through many circuits before giving up.
1844 - In the hidden service example in torrc.sample, stop recommending
1845 esoteric and discouraged hidden service options.
1846 - When stopping an NT service, wait up to 10 sec for it to actually
1847 stop. (Patch from Matt Edman; resolves bug 295.)
1848 - Fix handling of verbose nicknames with ORCONN controller events:
1849 make them show up exactly when requested, rather than exactly when
1851 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
1852 printing a duplicate "$" in the keys we send (reported by mwenge).
1853 - Correctly set maximum connection limit on Cygwin. (This time
1855 - Try to detect Windows correctly when cross-compiling.
1856 - Detect the size of the routers file correctly even if it is
1857 corrupted (on systems without mmap) or not page-aligned (on systems
1858 with mmap). This bug was harmless.
1859 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
1860 to open a stream fails; now we do in more cases. This should
1861 make clients able to find a good exit faster in some cases, since
1862 unhandleable requests will now get an error rather than timing out.
1863 - Resolve two memory leaks when rebuilding the on-disk router cache
1864 (reported by fookoowa).
1865 - Clean up minor code warnings suggested by the MIPSpro C compiler,
1866 and reported by some Centos users.
1867 - Controller signals now work on non-Unix platforms that don't define
1868 SIGUSR1 and SIGUSR2 the way we expect.
1869 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
1870 values before failing, and always enables eventdns.
1871 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
1872 Try to fix this in configure.in by checking for most functions
1873 before we check for libevent.
1876 Changes in version 0.1.2.2-alpha - 2006-10-07
1878 - Make our async eventdns library on-by-default for Tor servers,
1879 and plan to deprecate the separate dnsworker threads.
1880 - Add server-side support for "reverse" DNS lookups (using PTR
1881 records so clients can determine the canonical hostname for a given
1882 IPv4 address). Only supported by servers using eventdns; servers
1883 now announce in their descriptors whether they support eventdns.
1884 - Specify and implement client-side SOCKS5 interface for reverse DNS
1885 lookups (see doc/socks-extensions.txt).
1886 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
1887 connect to directory servers through Tor. Previously, clients needed
1888 to find Tor exits to make private connections to directory servers.
1889 - Avoid choosing Exit nodes for entry or middle hops when the
1890 total bandwidth available from non-Exit nodes is much higher than
1891 the total bandwidth available from Exit nodes.
1892 - Workaround for name servers (like Earthlink's) that hijack failing
1893 DNS requests and replace the no-such-server answer with a "helpful"
1894 redirect to an advertising-driven search portal. Also work around
1895 DNS hijackers who "helpfully" decline to hijack known-invalid
1896 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
1897 lets you turn it off.
1898 - Send out a burst of long-range padding cells once we've established
1899 that we're reachable. Spread them over 4 circuits, so hopefully
1900 a few will be fast. This exercises our bandwidth and bootstraps
1901 us into the directory more quickly.
1903 o New/improved config options:
1904 - Add new config option "ResolvConf" to let the server operator
1905 choose an alternate resolve.conf file when using eventdns.
1906 - Add an "EnforceDistinctSubnets" option to control our "exclude
1907 servers on the same /16" behavior. It's still on by default; this
1908 is mostly for people who want to operate private test networks with
1909 all the machines on the same subnet.
1910 - If one of our entry guards is on the ExcludeNodes list, or the
1911 directory authorities don't think it's a good guard, treat it as
1912 if it were unlisted: stop using it as a guard, and throw it off
1913 the guards list if it stays that way for a long time.
1914 - Allow directory authorities to be marked separately as authorities
1915 for the v1 directory protocol, the v2 directory protocol, and
1916 as hidden service directories, to make it easier to retire old
1917 authorities. V1 authorities should set "HSAuthoritativeDir 1"
1918 to continue being hidden service authorities too.
1919 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
1921 o Minor features, controller:
1922 - Fix CIRC controller events so that controllers can learn the
1923 identity digests of non-Named servers used in circuit paths.
1924 - Let controllers ask for more useful identifiers for servers. Instead
1925 of learning identity digests for un-Named servers and nicknames
1926 for Named servers, the new identifiers include digest, nickname,
1927 and indication of Named status. Off by default; see control-spec.txt
1928 for more information.
1929 - Add a "getinfo address" controller command so it can display Tor's
1930 best guess to the user.
1931 - New controller event to alert the controller when our server
1932 descriptor has changed.
1933 - Give more meaningful errors on controller authentication failure.
1935 o Minor features, other:
1936 - When asked to resolve a hostname, don't use non-exit servers unless
1937 requested to do so. This allows servers with broken DNS to be
1938 useful to the network.
1939 - Divide eventdns log messages into warn and info messages.
1940 - Reserve the nickname "Unnamed" for routers that can't pick
1941 a hostname: any router can call itself Unnamed; directory
1942 authorities will never allocate Unnamed to any particular router;
1943 clients won't believe that any router is the canonical Unnamed.
1944 - Only include function names in log messages for info/debug messages.
1945 For notice/warn/err, the content of the message should be clear on
1946 its own, and printing the function name only confuses users.
1947 - Avoid some false positives during reachability testing: don't try
1948 to test via a server that's on the same /24 as us.
1949 - If we fail to build a circuit to an intended enclave, and it's
1950 not mandatory that we use that enclave, stop wanting it.
1951 - When eventdns is enabled, allow multithreaded builds on NetBSD and
1952 OpenBSD. (We had previously disabled threads on these platforms
1953 because they didn't have working thread-safe resolver functions.)
1955 o Major bugfixes, anonymity/security:
1956 - If a client asked for a server by name, and there's a named server
1957 in our network-status but we don't have its descriptor yet, we
1958 could return an unnamed server instead.
1959 - Fix NetBSD bug that could allow someone to force uninitialized RAM
1960 to be sent to a server's DNS resolver. This only affects NetBSD
1961 and other platforms that do not bounds-check tolower().
1962 - Reject (most) attempts to use Tor circuits with length one. (If
1963 many people start using Tor as a one-hop proxy, exit nodes become
1964 a more attractive target for compromise.)
1965 - Just because your DirPort is open doesn't mean people should be
1966 able to remotely teach you about hidden service descriptors. Now
1967 only accept rendezvous posts if you've got HSAuthoritativeDir set.
1969 o Major bugfixes, other:
1970 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
1971 - When a client asks the server to resolve (not connect to)
1972 an address, and it has a cached answer, give them the cached answer.
1973 Previously, the server would give them no answer at all.
1974 - Allow really slow clients to not hang up five minutes into their
1975 directory downloads (suggested by Adam J. Richter).
1976 - We were building exactly the wrong circuits when we anticipated
1977 hidden service requirements, meaning Tor would have to build all
1978 its circuits on demand.
1979 - Avoid crashing when we mmap a router cache file of size 0.
1980 - When testing reachability of our DirPort, don't launch new
1981 tests when there's already one in progress -- unreachable
1982 servers were stacking up dozens of testing streams.
1984 o Minor bugfixes, correctness:
1985 - If we're a directory mirror and we ask for "all" network status
1986 documents, we would discard status documents from authorities
1988 - Avoid a memory corruption bug when creating a hash table for
1990 - Avoid controller-triggered crash when misusing certain commands
1991 from a v0 controller on platforms that do not handle
1992 printf("%s",NULL) gracefully.
1993 - Don't crash when a controller sends a third argument to an
1994 "extendcircuit" request.
1995 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
1996 response; fix error code when "getinfo dir/status/" fails.
1997 - Avoid crash when telling controller stream-status and a stream
1999 - Patch from Adam Langley to fix assert() in eventdns.c.
2000 - Fix a debug log message in eventdns to say "X resolved to Y"
2001 instead of "X resolved to X".
2002 - Make eventdns give strings for DNS errors, not just error numbers.
2003 - Track unreachable entry guards correctly: don't conflate
2004 'unreachable by us right now' with 'listed as down by the directory
2005 authorities'. With the old code, if a guard was unreachable by
2006 us but listed as running, it would clog our guard list forever.
2007 - Behave correctly in case we ever have a network with more than
2008 2GB/s total advertised capacity.
2009 - Make TrackExitHosts case-insensitive, and fix the behavior of
2010 ".suffix" TrackExitHosts items to avoid matching in the middle of
2012 - Finally fix the openssl warnings from newer gccs that believe that
2013 ignoring a return value is okay, but casting a return value and
2014 then ignoring it is a sign of madness.
2015 - Prevent the contrib/exitlist script from printing the same
2016 result more than once.
2017 - Patch from Steve Hildrey: Generate network status correctly on
2018 non-versioning dirservers.
2019 - Don't listen to the X-Your-Address-Is hint if you did the lookup
2020 via Tor; otherwise you'll think you're the exit node's IP address.
2022 o Minor bugfixes, performance:
2023 - Two small performance improvements on parsing descriptors.
2024 - Major performance improvement on inserting descriptors: change
2025 algorithm from O(n^2) to O(n).
2026 - Make the common memory allocation path faster on machines where
2027 malloc(0) returns a pointer.
2028 - Start remembering X-Your-Address-Is directory hints even if you're
2029 a client, so you can become a server more smoothly.
2030 - Avoid duplicate entries on MyFamily line in server descriptor.
2032 o Packaging, features:
2033 - Remove architecture from OS X builds. The official builds are
2034 now universal binaries.
2035 - The Debian package now uses --verify-config when (re)starting,
2036 to distinguish configuration errors from other errors.
2037 - Update RPMs to require libevent 1.1b.
2039 o Packaging, bugfixes:
2040 - Patches so Tor builds with MinGW on Windows.
2041 - Patches so Tor might run on Cygwin again.
2042 - Resume building on non-gcc compilers and ancient gcc. Resume
2043 building with the -O0 compile flag. Resume building cleanly on
2045 - Run correctly on OS X platforms with case-sensitive filesystems.
2046 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
2047 - Add autoconf checks so Tor can build on Solaris x86 again.
2050 - Documented (and renamed) ServerDNSSearchDomains and
2051 ServerDNSResolvConfFile options.
2052 - Be clearer that the *ListenAddress directives can be repeated
2056 Changes in version 0.1.1.24 - 2006-09-29
2058 - Allow really slow clients to not hang up five minutes into their
2059 directory downloads (suggested by Adam J. Richter).
2060 - Fix major performance regression from 0.1.0.x: instead of checking
2061 whether we have enough directory information every time we want to
2062 do something, only check when the directory information has changed.
2063 This should improve client CPU usage by 25-50%.
2064 - Don't crash if, after a server has been running for a while,
2065 it can't resolve its hostname.
2068 - Allow Tor to start when RunAsDaemon is set but no logs are set.
2069 - Don't crash when the controller receives a third argument to an
2070 "extendcircuit" request.
2071 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
2072 response; fix error code when "getinfo dir/status/" fails.
2073 - Fix configure.in to not produce broken configure files with
2074 more recent versions of autoconf. Thanks to Clint for his auto*
2076 - Fix security bug on NetBSD that could allow someone to force
2077 uninitialized RAM to be sent to a server's DNS resolver. This
2078 only affects NetBSD and other platforms that do not bounds-check
2080 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
2081 methods: these are known to be buggy.
2082 - If we're a directory mirror and we ask for "all" network status
2083 documents, we would discard status documents from authorities
2087 Changes in version 0.1.2.1-alpha - 2006-08-27
2089 - Add "eventdns" async dns library from Adam Langley, tweaked to
2090 build on OSX and Windows. Only enabled if you pass the
2091 --enable-eventdns argument to configure.
2092 - Allow servers with no hostname or IP address to learn their
2093 IP address by asking the directory authorities. This code only
2094 kicks in when you would normally have exited with a "no address"
2095 error. Nothing's authenticated, so use with care.
2096 - Rather than waiting a fixed amount of time between retrying
2097 application connections, we wait only 5 seconds for the first,
2098 10 seconds for the second, and 15 seconds for each retry after
2099 that. Hopefully this will improve the expected user experience.
2100 - Patch from Tup to add support for transparent AP connections:
2101 this basically bundles the functionality of trans-proxy-tor
2102 into the Tor mainline. Now hosts with compliant pf/netfilter
2103 implementations can redirect TCP connections straight to Tor
2104 without diverting through SOCKS. Needs docs.
2105 - Busy directory servers save lots of memory by spooling server
2106 descriptors, v1 directories, and v2 networkstatus docs to buffers
2107 as needed rather than en masse. Also mmap the cached-routers
2108 files, so we don't need to keep the whole thing in memory too.
2109 - Automatically avoid picking more than one node from the same
2110 /16 network when constructing a circuit.
2111 - Revise and clean up the torrc.sample that we ship with; add
2112 a section for BandwidthRate and BandwidthBurst.
2115 - Split circuit_t into origin_circuit_t and or_circuit_t, and
2116 split connection_t into edge, or, dir, control, and base structs.
2117 These will save quite a bit of memory on busy servers, and they'll
2118 also help us track down bugs in the code and bugs in the spec.
2119 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
2120 or later. Log when we are doing this, so we can diagnose it when
2121 it fails. (Also, recommend libevent 1.1b for kqueue and
2122 win32 methods; deprecate libevent 1.0b harder; make libevent
2123 recommendation system saner.)
2124 - Start being able to build universal binaries on OS X (thanks
2126 - Export the default exit policy via the control port, so controllers
2127 don't need to guess what it is / will be later.
2128 - Add a man page entry for ProtocolWarnings.
2129 - Add TestVia config option to the man page.
2130 - Remove even more protocol-related warnings from Tor server logs,
2131 such as bad TLS handshakes and malformed begin cells.
2132 - Stop fetching descriptors if you're not a dir mirror and you
2133 haven't tried to establish any circuits lately. [This currently
2134 causes some dangerous behavior, because when you start up again
2135 you'll use your ancient server descriptors.]
2136 - New DirPort behavior: if you have your dirport set, you download
2137 descriptors aggressively like a directory mirror, whether or not
2139 - Get rid of the router_retry_connections notion. Now routers
2140 no longer try to rebuild long-term connections to directory
2141 authorities, and directory authorities no longer try to rebuild
2142 long-term connections to all servers. We still don't hang up
2143 connections in these two cases though -- we need to look at it
2144 more carefully to avoid flapping, and we likely need to wait til
2145 0.1.1.x is obsolete.
2146 - Drop compatibility with obsolete Tors that permit create cells
2147 to have the wrong circ_id_type.
2148 - Re-enable per-connection rate limiting. Get rid of the "OP
2149 bandwidth" concept. Lay groundwork for "bandwidth classes" --
2150 separate global buckets that apply depending on what sort of conn
2152 - Start publishing one minute or so after we find our ORPort
2153 to be reachable. This will help reduce the number of descriptors
2154 we have for ourselves floating around, since it's quite likely
2155 other things (e.g. DirPort) will change during that minute too.
2156 - Fork the v1 directory protocol into its own spec document,
2157 and mark dir-spec.txt as the currently correct (v2) spec.
2160 - When we find our DirPort to be reachable, publish a new descriptor
2161 so we'll tell the world (reported by pnx).
2162 - Publish a new descriptor after we hup/reload. This is important
2163 if our config has changed such that we'll want to start advertising
2164 our DirPort now, etc.
2165 - Allow Tor to start when RunAsDaemon is set but no logs are set.
2166 - When we have a state file we cannot parse, tell the user and
2167 move it aside. Now we avoid situations where the user starts
2168 Tor in 1904, Tor writes a state file with that timestamp in it,
2169 the user fixes her clock, and Tor refuses to start.
2170 - Fix configure.in to not produce broken configure files with
2171 more recent versions of autoconf. Thanks to Clint for his auto*
2173 - "tor --verify-config" now exits with -1(255) or 0 depending on
2174 whether the config options are bad or good.
2175 - Resolve bug 321 when using dnsworkers: append a period to every
2176 address we resolve at the exit node, so that we do not accidentally
2177 pick up local addresses, and so that failing searches are retried
2178 in the resolver search domains. (This is already solved for
2179 eventdns.) (This breaks Blossom servers for now.)
2180 - If we are using an exit enclave and we can't connect, e.g. because
2181 its webserver is misconfigured to not listen on localhost, then
2182 back off and try connecting from somewhere else before we fail.
2185 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
2186 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
2187 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
2188 when the IP address is mapped through MapAddress to a hostname.
2189 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
2190 useless IPv6 DNS resolves.
2191 - Patch suggested by Karsten Loesing: respond to SIGNAL command
2192 before we execute the signal, in case the signal shuts us down.
2193 - Clean up AllowInvalidNodes man page entry.
2194 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
2195 - Add more asserts to track down an assert error on a windows Tor
2196 server with connection_add being called with socket == -1.
2197 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
2198 - Fix misleading log messages: an entry guard that is "unlisted",
2199 as well as not known to be "down" (because we've never heard
2200 of it), is not therefore "up".
2201 - Remove code to special-case "-cvs" ending, since it has not
2202 actually mattered since 0.0.9.
2203 - Make our socks5 handling more robust to broken socks clients:
2204 throw out everything waiting on the buffer in between socks
2205 handshake phases, since they can't possibly (so the theory
2206 goes) have predicted what we plan to respond to them.
2209 Changes in version 0.1.1.23 - 2006-07-30
2211 - Fast Tor servers, especially exit nodes, were triggering asserts
2212 due to a bug in handling the list of pending DNS resolves. Some
2213 bugs still remain here; we're hunting them.
2214 - Entry guards could crash clients by sending unexpected input.
2215 - More fixes on reachability testing: if you find yourself reachable,
2216 then don't ever make any client requests (so you stop predicting
2217 circuits), then hup or have your clock jump, then later your IP
2218 changes, you won't think circuits are working, so you won't try to
2219 test reachability, so you won't publish.
2222 - Avoid a crash if the controller does a resetconf firewallports
2223 and then a setconf fascistfirewall=1.
2224 - Avoid an integer underflow when the dir authority decides whether
2225 a router is stable: we might wrongly label it stable, and compute
2226 a slightly wrong median stability, when a descriptor is published
2228 - Fix a place where we might trigger an assert if we can't build our
2229 own server descriptor yet.
2232 Changes in version 0.1.1.22 - 2006-07-05
2234 - Fix a big bug that was causing servers to not find themselves
2235 reachable if they changed IP addresses. Since only 0.1.1.22+
2236 servers can do reachability testing correctly, now we automatically
2237 make sure to test via one of these.
2238 - Fix to allow clients and mirrors to learn directory info from
2239 descriptor downloads that get cut off partway through.
2240 - Directory authorities had a bug in deciding if a newly published
2241 descriptor was novel enough to make everybody want a copy -- a few
2242 servers seem to be publishing new descriptors many times a minute.
2244 - Fix a rare bug that was causing some servers to complain about
2245 "closing wedged cpuworkers" and skip some circuit create requests.
2246 - Make the Exit flag in directory status documents actually work.
2249 Changes in version 0.1.1.21 - 2006-06-10
2250 o Crash and assert fixes from 0.1.1.20:
2251 - Fix a rare crash on Tor servers that have enabled hibernation.
2252 - Fix a seg fault on startup for Tor networks that use only one
2253 directory authority.
2254 - Fix an assert from a race condition that occurs on Tor servers
2255 while exiting, where various threads are trying to log that they're
2256 exiting, and delete the logs, at the same time.
2257 - Make our unit tests pass again on certain obscure platforms.
2260 - Add support for building SUSE RPM packages.
2261 - Speed up initial bootstrapping for clients: if we are making our
2262 first ever connection to any entry guard, then don't mark it down
2264 - When only one Tor server in the network is labelled as a guard,
2265 and we've already picked him, we would cycle endlessly picking him
2266 again, being unhappy about it, etc. Now we specifically exclude
2267 current guards when picking a new guard.
2268 - Servers send create cells more reliably after the TLS connection
2269 is established: we were sometimes forgetting to send half of them
2270 when we had more than one pending.
2271 - If we get a create cell that asks us to extend somewhere, but the
2272 Tor server there doesn't match the expected digest, we now send
2273 a destroy cell back, rather than silently doing nothing.
2274 - Make options->RedirectExit work again.
2275 - Make cookie authentication for the controller work again.
2276 - Stop being picky about unusual characters in the arguments to
2277 mapaddress. It's none of our business.
2278 - Add a new config option "TestVia" that lets you specify preferred
2279 middle hops to use for test circuits. Perhaps this will let me
2280 debug the reachability problems better.
2282 o Log / documentation fixes:
2283 - If we're a server and some peer has a broken TLS certificate, don't
2284 log about it unless ProtocolWarnings is set, i.e., we want to hear
2285 about protocol violations by others.
2286 - Fix spelling of VirtualAddrNetwork in man page.
2287 - Add a better explanation at the top of the autogenerated torrc file
2288 about what happened to our old torrc.
2291 Changes in version 0.1.1.20 - 2006-05-23
2293 - Downgrade a log severity where servers complain that they're
2295 - Avoid a compile warning on FreeBSD.
2296 - Remove string size limit on NEWDESC messages; solve bug 291.
2297 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
2298 more thoroughly when we're running on windows.
2301 Changes in version 0.1.1.19-rc - 2006-05-03
2303 - Regenerate our local descriptor if it's dirty and we try to use
2304 it locally (e.g. if it changes during reachability detection).
2305 - If we setconf our ORPort to 0, we continued to listen on the
2306 old ORPort and receive connections.
2307 - Avoid a second warning about machine/limits.h on Debian
2309 - Be willing to add our own routerinfo into the routerlist.
2310 Now authorities will include themselves in their directories
2311 and network-statuses.
2312 - Stop trying to upload rendezvous descriptors to every
2313 directory authority: only try the v1 authorities.
2314 - Servers no longer complain when they think they're not
2315 registered with the directory authorities. There were too many
2317 - Backport dist-rpm changes so rpms can be built without errors.
2320 - Implement an option, VirtualAddrMask, to set which addresses
2321 get handed out in response to mapaddress requests. This works
2322 around a bug in tsocks where 127.0.0.0/8 is never socksified.
2325 Changes in version 0.1.1.18-rc - 2006-04-10
2327 - Work harder to download live network-statuses from all the
2328 directory authorities we know about. Improve the threshold
2329 decision logic so we're more robust to edge cases.
2330 - When fetching rendezvous descriptors, we were willing to ask
2331 v2 authorities too, which would always return 404.
2334 - Stop listing down or invalid nodes in the v1 directory. This will
2335 reduce its bulk by about 1/3, and reduce load on directory
2337 - When deciding whether a router is Fast or Guard-worthy, consider
2338 his advertised BandwidthRate and not just the BandwidthCapacity.
2339 - No longer ship INSTALL and README files -- they are useless now.
2340 - Force rpmbuild to behave and honor target_cpu.
2341 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
2342 - Start to include translated versions of the tor-doc-*.html
2343 files, along with the screenshots. Still needs more work.
2344 - Start sending back 512 and 451 errors if mapaddress fails,
2345 rather than not sending anything back at all.
2346 - When we fail to bind or listen on an incoming or outgoing
2347 socket, we should close it before failing. otherwise we just
2348 leak it. (thanks to weasel for finding.)
2349 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
2350 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
2351 - Make NoPublish (even though deprecated) work again.
2352 - Fix a minor security flaw where a versioning auth dirserver
2353 could list a recommended version many times in a row to make
2354 clients more convinced that it's recommended.
2355 - Fix crash bug if there are two unregistered servers running
2356 with the same nickname, one of them is down, and you ask for
2357 them by nickname in your EntryNodes or ExitNodes. Also, try
2358 to pick the one that's running rather than an arbitrary one.
2359 - Fix an infinite loop we could hit if we go offline for too long.
2360 - Complain when we hit WSAENOBUFS on recv() or write() too.
2361 Perhaps this will help us hunt the bug.
2362 - If you're not a versioning dirserver, don't put the string
2363 "client-versions \nserver-versions \n" in your network-status.
2364 - Lower the minimum required number of file descriptors to 1000,
2365 so we can have some overhead for Valgrind on Linux, where the
2366 default ulimit -n is 1024.
2369 - Add tor.dizum.com as the fifth authoritative directory server.
2370 - Add a new config option FetchUselessDescriptors, off by default,
2371 for when you plan to run "exitlist" on your client and you want
2372 to know about even the non-running descriptors.
2375 Changes in version 0.1.1.17-rc - 2006-03-28
2377 - Clients and servers since 0.1.1.10-alpha have been expiring
2378 connections whenever they are idle for 5 minutes and they *do*
2379 have circuits on them. Oops. With this new version, clients will
2380 discard their previous entry guard choices and avoid choosing
2381 entry guards running these flawed versions.
2382 - Fix memory leak when uncompressing concatenated zlib streams. This
2383 was causing substantial leaks over time on Tor servers.
2384 - The v1 directory was including servers as much as 48 hours old,
2385 because that's how the new routerlist->routers works. Now only
2386 include them if they're 20 hours old or less.
2389 - Resume building on irix64, netbsd 2.0, etc.
2390 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
2392 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
2393 and it is confusing some users.
2394 - Mirrors stop caching the v1 directory so often.
2395 - Make the max number of old descriptors that a cache will hold
2396 rise with the number of directory authorities, so we can scale.
2397 - Change our win32 uname() hack to be more forgiving about what
2398 win32 versions it thinks it's found.
2401 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
2403 - When the controller's *setconf commands fail, collect an error
2404 message in a string and hand it back to the controller.
2405 - Make the v2 dir's "Fast" flag based on relative capacity, just
2406 like "Stable" is based on median uptime. Name everything in the
2407 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
2408 - Log server fingerprint on startup, so new server operators don't
2409 have to go hunting around their filesystem for it.
2410 - Return a robots.txt on our dirport to discourage google indexing.
2411 - Let the controller ask for GETINFO dir/status/foo so it can ask
2412 directly rather than connecting to the dir port. Only works when
2413 dirport is set for now.
2415 o New config options rather than constants in the code:
2416 - SocksTimeout: How long do we let a socks connection wait
2417 unattached before we fail it?
2418 - CircuitBuildTimeout: Cull non-open circuits that were born
2419 at least this many seconds ago.
2420 - CircuitIdleTimeout: Cull open clean circuits that were born
2421 at least this many seconds ago.
2424 Changes in version 0.1.1.16-rc - 2006-03-18
2425 o Bugfixes on 0.1.1.15-rc:
2426 - Fix assert when the controller asks to attachstream a connect-wait
2427 or resolve-wait stream.
2428 - Now do address rewriting when the controller asks us to attach
2429 to a particular circuit too. This will let Blossom specify
2430 "moria2.exit" without having to learn what moria2's IP address is.
2431 - Make the "tor --verify-config" command-line work again, so people
2432 can automatically check if their torrc will parse.
2433 - Authoritative dirservers no longer require an open connection from
2434 a server to consider him "reachable". We need this change because
2435 when we add new auth dirservers, old servers won't know not to
2437 - Let Tor build on Sun CC again.
2438 - Fix an off-by-one buffer size in dirserv.c that magically never
2439 hit our three authorities but broke sjmurdoch's own tor network.
2440 - If we as a directory mirror don't know of any v1 directory
2441 authorities, then don't try to cache any v1 directories.
2442 - Stop warning about unknown servers in our family when they are
2443 given as hex digests.
2444 - Stop complaining as quickly to the server operator that he
2445 hasn't registered his nickname/key binding.
2446 - Various cleanups so we can add new V2 Auth Dirservers.
2447 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
2448 reflect the updated flags in our v2 dir protocol.
2449 - Resume allowing non-printable characters for exit streams (both
2450 for connecting and for resolving). Now we tolerate applications
2451 that don't follow the RFCs. But continue to block malformed names
2454 o Bugfixes on 0.1.0.x:
2455 - Fix assert bug in close_logs(): when we close and delete logs,
2456 remove them all from the global "logfiles" list.
2457 - Fix minor integer overflow in calculating when we expect to use up
2458 our bandwidth allocation before hibernating.
2459 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
2460 there are multiple SSLs installed with different versions.
2461 - When we try to be a server and Address is not explicitly set and
2462 our hostname resolves to a private IP address, try to use an
2463 interface address if it has a public address. Now Windows machines
2464 that think of themselves as localhost can work by default.
2467 - Let the controller ask for GETINFO dir/server/foo so it can ask
2468 directly rather than connecting to the dir port.
2469 - Let the controller tell us about certain router descriptors
2470 that it doesn't want Tor to use in circuits. Implement
2471 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
2472 - New config option SafeSocks to reject all application connections
2473 using unsafe socks protocols. Defaults to off.
2476 Changes in version 0.1.1.15-rc - 2006-03-11
2477 o Bugfixes and cleanups:
2478 - When we're printing strings from the network, don't try to print
2479 non-printable characters. This protects us against shell escape
2480 sequence exploits, and also against attacks to fool humans into
2481 misreading their logs.
2482 - Fix a bug where Tor would fail to establish any connections if you
2483 left it off for 24 hours and then started it: we were happy with
2484 the obsolete network statuses, but they all referred to router
2485 descriptors that were too old to fetch, so we ended up with no
2486 valid router descriptors.
2487 - Fix a seg fault in the controller's "getinfo orconn-status"
2488 command while listing status on incoming handshaking connections.
2489 Introduce a status name "NEW" for these connections.
2490 - If we get a linelist or linelist_s config option from the torrc
2491 (e.g. ExitPolicy) and it has no value, warn and skip rather than
2492 silently resetting it to its default.
2493 - Don't abandon entry guards until they've been down or gone for
2495 - Cleaner and quieter log messages.
2498 - New controller signal NEWNYM that makes new application requests
2500 - Add a new circuit purpose 'controller' to let the controller ask
2501 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
2502 controller command to let you specify the purpose if you're
2503 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
2504 command to let you change a circuit's purpose after it's been
2506 - Accept "private:*" in routerdesc exit policies; not generated yet
2507 because older Tors do not understand it.
2508 - Add BSD-style contributed startup script "rc.subr" from Peter
2512 Changes in version 0.1.1.14-alpha - 2006-02-20
2513 o Bugfixes on 0.1.1.x:
2514 - Don't die if we ask for a stdout or stderr log (even implicitly)
2515 and we're set to RunAsDaemon -- just warn.
2516 - We still had a few bugs in the OR connection rotation code that
2517 caused directory servers to slowly aggregate connections to other
2518 fast Tor servers. This time for sure!
2519 - Make log entries on Win32 include the name of the function again.
2520 - We were treating a pair of exit policies if they were equal even
2521 if one said accept and the other said reject -- causing us to
2522 not always publish a new descriptor since we thought nothing
2524 - Retry pending server downloads as well as pending networkstatus
2525 downloads when we unexpectedly get a socks request.
2526 - We were ignoring the IS_FAST flag in the directory status,
2527 meaning we were willing to pick trivial-bandwidth nodes for "fast"
2529 - If the controller's SAVECONF command fails (e.g. due to file
2530 permissions), let the controller know that it failed.
2533 - If we're trying to be a Tor server and running Windows 95/98/ME
2534 as a server, explain that we'll likely crash.
2535 - When we're a server, a client asks for an old-style directory,
2536 and our write bucket is empty, don't give it to him. This way
2537 small servers can continue to serve the directory *sometimes*,
2538 without getting overloaded.
2539 - Compress exit policies even more -- look for duplicate lines
2541 - Clients now honor the "guard" flag in the router status when
2542 picking entry guards, rather than looking at is_fast or is_stable.
2543 - Retain unrecognized lines in $DATADIR/state file, so that we can
2544 be forward-compatible.
2545 - Generate 18.0.0.0/8 address policy format in descs when we can;
2546 warn when the mask is not reducible to a bit-prefix.
2547 - Let the user set ControlListenAddress in the torrc. This can be
2548 dangerous, but there are some cases (like a secured LAN) where it
2550 - Split ReachableAddresses into ReachableDirAddresses and
2551 ReachableORAddresses, so we can restrict Dir conns to port 80
2552 and OR conns to port 443.
2553 - Now we can target arch and OS in rpm builds (contributed by
2554 Phobos). Also make the resulting dist-rpm filename match the
2556 - New config options to help controllers: FetchServerDescriptors
2557 and FetchHidServDescriptors for whether to fetch server
2558 info and hidserv info or let the controller do it, and
2559 PublishServerDescriptor and PublishHidServDescriptors.
2560 - Also let the controller set the __AllDirActionsPrivate config
2561 option if you want all directory fetches/publishes to happen via
2562 Tor (it assumes your controller bootstraps your circuits).
2565 Changes in version 0.1.0.17 - 2006-02-17
2566 o Crash bugfixes on 0.1.0.x:
2567 - When servers with a non-zero DirPort came out of hibernation,
2568 sometimes they would trigger an assert.
2570 o Other important bugfixes:
2571 - On platforms that don't have getrlimit (like Windows), we were
2572 artificially constraining ourselves to a max of 1024
2573 connections. Now just assume that we can handle as many as 15000
2574 connections. Hopefully this won't cause other problems.
2576 o Backported features:
2577 - When we're a server, a client asks for an old-style directory,
2578 and our write bucket is empty, don't give it to him. This way
2579 small servers can continue to serve the directory *sometimes*,
2580 without getting overloaded.
2581 - Whenever you get a 503 in response to a directory fetch, try
2582 once more. This will become important once servers start sending
2583 503's whenever they feel busy.
2584 - Fetch a new directory every 120 minutes, not every 40 minutes.
2585 Now that we have hundreds of thousands of users running the old
2586 directory algorithm, it's starting to hurt a lot.
2587 - Bump up the period for forcing a hidden service descriptor upload
2588 from 20 minutes to 1 hour.
2591 Changes in version 0.1.1.13-alpha - 2006-02-09
2592 o Crashes in 0.1.1.x:
2593 - When you tried to setconf ORPort via the controller, Tor would
2594 crash. So people using TorCP to become a server were sad.
2595 - Solve (I hope) the stack-smashing bug that we were seeing on fast
2596 servers. The problem appears to be something do with OpenSSL's
2597 random number generation, or how we call it, or something. Let me
2598 know if the crashes continue.
2599 - Turn crypto hardware acceleration off by default, until we find
2600 somebody smart who can test it for us. (It appears to produce
2601 seg faults in at least some cases.)
2602 - Fix a rare assert error when we've tried all intro points for
2603 a hidden service and we try fetching the service descriptor again:
2604 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
2607 - Fix a major load balance bug: we were round-robining in 16 KB
2608 chunks, and servers with bandwidthrate of 20 KB, while downloading
2609 a 600 KB directory, would starve their other connections. Now we
2610 try to be a bit more fair.
2611 - Dir authorities and mirrors were never expiring the newest
2612 descriptor for each server, causing memory and directory bloat.
2613 - Fix memory-bloating and connection-bloating bug on servers: We
2614 were never closing any connection that had ever had a circuit on
2615 it, because we were checking conn->n_circuits == 0, yet we had a
2616 bug that let it go negative.
2617 - Make Tor work using squid as your http proxy again -- squid
2618 returns an error if you ask for a URL that's too long, and it uses
2619 a really generic error message. Plus, many people are behind a
2620 transparent squid so they don't even realize it.
2621 - On platforms that don't have getrlimit (like Windows), we were
2622 artificially constraining ourselves to a max of 1024
2623 connections. Now just assume that we can handle as many as 15000
2624 connections. Hopefully this won't cause other problems.
2625 - Add a new config option ExitPolicyRejectPrivate which defaults to
2626 1. This means all exit policies will begin with rejecting private
2627 addresses, unless the server operator explicitly turns it off.
2630 - Clients no longer download descriptors for non-running
2632 - Before we add new directory authorities, we should make it
2633 clear that only v1 authorities should receive/publish hidden
2634 service descriptors.
2637 - As soon as we've fetched some more directory info, immediately
2638 try to download more server descriptors. This way we don't have
2639 a 10 second pause during initial bootstrapping.
2640 - Remove even more loud log messages that the server operator can't
2642 - When we're running an obsolete or un-recommended version, make
2643 the log message more clear about what the problem is and what
2644 versions *are* still recommended.
2645 - Provide a more useful warn message when our onion queue gets full:
2646 the CPU is too slow or the exit policy is too liberal.
2647 - Don't warn when we receive a 503 from a dirserver/cache -- this
2648 will pave the way for them being able to refuse if they're busy.
2649 - When we fail to bind a listener, try to provide a more useful
2650 log message: e.g., "Is Tor already running?"
2651 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
2652 Goldberg can prove things about our handshake protocol more
2654 - MaxConn has been obsolete for a while now. Document the ConnLimit
2655 config option, which is a *minimum* number of file descriptors
2656 that must be available else Tor refuses to start.
2657 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
2658 if you log to syslog and want something other than LOG_DAEMON.
2659 - Make dirservers generate a separate "guard" flag to mean,
2660 "would make a good entry guard". Make clients parse it and vote
2661 on it. Not used by clients yet.
2662 - Implement --with-libevent-dir option to ./configure. Also, improve
2663 search techniques to find libevent, and use those for openssl too.
2664 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
2665 - Only start testing reachability once we've established a
2666 circuit. This will make startup on dirservers less noisy.
2667 - Don't try to upload hidden service descriptors until we have
2668 established a circuit.
2669 - Fix the controller's "attachstream 0" command to treat conn like
2670 it just connected, doing address remapping, handling .exit and
2671 .onion idioms, and so on. Now we're more uniform in making sure
2672 that the controller hears about new and closing connections.
2675 Changes in version 0.1.1.12-alpha - 2006-01-11
2676 o Bugfixes on 0.1.1.x:
2677 - The fix to close duplicate server connections was closing all
2678 Tor client connections if they didn't establish a circuit
2679 quickly enough. Oops.
2680 - Fix minor memory issue (double-free) that happened on exit.
2682 o Bugfixes on 0.1.0.x:
2683 - Tor didn't warn when it failed to open a log file.
2686 Changes in version 0.1.1.11-alpha - 2006-01-10
2687 o Crashes in 0.1.1.x:
2688 - Include all the assert/crash fixes from 0.1.0.16.
2689 - If you start Tor and then quit very quickly, there were some
2690 races that tried to free things that weren't allocated yet.
2691 - Fix a rare memory stomp if you're running hidden services.
2692 - Fix segfault when specifying DirServer in config without nickname.
2693 - Fix a seg fault when you finish connecting to a server but at
2694 that moment you dump his server descriptor.
2695 - Extendcircuit and Attachstream controller commands would
2696 assert/crash if you don't give them enough arguments.
2697 - Fix an assert error when we're out of space in the connection_list
2698 and we try to post a hidden service descriptor (reported by weasel).
2699 - If you specify a relative torrc path and you set RunAsDaemon in
2700 your torrc, then it chdir()'s to the new directory. If you HUP,
2701 it tries to load the new torrc location, fails, and exits.
2702 The fix: no longer allow a relative path to torrc using -f.
2705 - Implement "entry guards": automatically choose a handful of entry
2706 nodes and stick with them for all circuits. Only pick new guards
2707 when the ones you have are unsuitable, and if the old guards
2708 become suitable again, switch back. This will increase security
2709 dramatically against certain end-point attacks. The EntryNodes
2710 config option now provides some hints about which entry guards you
2711 want to use most; and StrictEntryNodes means to only use those.
2712 - New directory logic: download by descriptor digest, not by
2713 fingerprint. Caches try to download all listed digests from
2714 authorities; clients try to download "best" digests from caches.
2715 This avoids partitioning and isolating attacks better.
2716 - Make the "stable" router flag in network-status be the median of
2717 the uptimes of running valid servers, and make clients pay
2718 attention to the network-status flags. Thus the cutoff adapts
2719 to the stability of the network as a whole, making IRC, IM, etc
2720 connections more reliable.
2723 - Tor servers with dynamic IP addresses were needing to wait 18
2724 hours before they could start doing reachability testing using
2725 the new IP address and ports. This is because they were using
2726 the internal descriptor to learn what to test, yet they were only
2727 rebuilding the descriptor once they decided they were reachable.
2728 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
2729 to download certain server descriptors, throw them away, and then
2730 fetch them again after 30 minutes. Now mirrors throw away these
2731 server descriptors so clients can't get them.
2732 - We were leaving duplicate connections to other ORs open for a week,
2733 rather than closing them once we detect a duplicate. This only
2734 really affected authdirservers, but it affected them a lot.
2735 - Spread the authdirservers' reachability testing over the entire
2736 testing interval, so we don't try to do 500 TLS's at once every
2740 - If the network is down, and we try to connect to a conn because
2741 we have a circuit in mind, and we timeout (30 seconds) because the
2742 network never answers, we were expiring the circuit, but we weren't
2743 obsoleting the connection or telling the entry_guards functions.
2744 - Some Tor servers process billions of cells per day. These statistics
2745 need to be uint64_t's.
2746 - Check for integer overflows in more places, when adding elements
2747 to smartlists. This could possibly prevent a buffer overflow
2748 on malicious huge inputs. I don't see any, but I haven't looked
2750 - ReachableAddresses kept growing new "reject *:*" lines on every
2752 - When you "setconf log" via the controller, it should remove all
2753 logs. We were automatically adding back in a "log notice stdout".
2754 - Newly bootstrapped Tor networks couldn't establish hidden service
2755 circuits until they had nodes with high uptime. Be more tolerant.
2756 - We were marking servers down when they could not answer every piece
2757 of the directory request we sent them. This was far too harsh.
2758 - Fix the torify (tsocks) config file to not use Tor for localhost
2760 - Directory authorities now go to the proper authority when asking for
2761 a networkstatus, even when they want a compressed one.
2762 - Fix a harmless bug that was causing Tor servers to log
2763 "Got an end because of misc error, but we're not an AP. Closing."
2764 - Authorities were treating their own descriptor changes as cosmetic,
2765 meaning the descriptor available in the network-status and the
2766 descriptor that clients downloaded were different.
2767 - The OS X installer was adding a symlink for tor_resolve but
2768 the binary was called tor-resolve (reported by Thomas Hardly).
2769 - Workaround a problem with some http proxies where they refuse GET
2770 requests that specify "Content-Length: 0" (reported by Adrian).
2771 - Fix wrong log message when you add a "HiddenServiceNodes" config
2772 line without any HiddenServiceDir line (reported by Chris Thomas).
2775 - Write the TorVersion into the state file so we have a prayer of
2776 keeping forward and backward compatibility.
2777 - Revive the FascistFirewall config option rather than eliminating it:
2778 now it's a synonym for ReachableAddresses *:80,*:443.
2779 - Clients choose directory servers from the network status lists,
2780 not from their internal list of router descriptors. Now they can
2781 go to caches directly rather than needing to go to authorities
2783 - Directory authorities ignore router descriptors that have only
2784 cosmetic differences: do this for 0.1.0.x servers now too.
2785 - Add a new flag to network-status indicating whether the server
2786 can answer v2 directory requests too.
2787 - Authdirs now stop whining so loudly about bad descriptors that
2788 they fetch from other dirservers. So when there's a log complaint,
2789 it's for sure from a freshly uploaded descriptor.
2790 - Reduce memory requirements in our structs by changing the order
2792 - There used to be two ways to specify your listening ports in a
2793 server descriptor: on the "router" line and with a separate "ports"
2794 line. Remove support for the "ports" line.
2795 - New config option "AuthDirRejectUnlisted" for auth dirservers as
2796 a panic button: if we get flooded with unusable servers we can
2797 revert to only listing servers in the approved-routers file.
2798 - Auth dir servers can now mark a fingerprint as "!reject" or
2799 "!invalid" in the approved-routers file (as its nickname), to
2800 refuse descriptors outright or include them but marked as invalid.
2801 - Servers store bandwidth history across restarts/crashes.
2802 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
2803 get a better idea of why their circuits failed. Not used yet.
2804 - Directory mirrors now cache up to 16 unrecognized network-status
2805 docs. Now we can add new authdirservers and they'll be cached too.
2806 - When picking a random directory, prefer non-authorities if any
2808 - New controller option "getinfo desc/all-recent" to fetch the
2809 latest server descriptor for every router that Tor knows about.
2812 Changes in version 0.1.0.16 - 2006-01-02
2813 o Crash bugfixes on 0.1.0.x:
2814 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
2815 corrupting the heap, losing FDs, or crashing when we need to resize
2816 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
2817 - It turns out sparc64 platforms crash on unaligned memory access
2818 too -- so detect and avoid this.
2819 - Handle truncated compressed data correctly (by detecting it and
2821 - Fix possible-but-unlikely free(NULL) in control.c.
2822 - When we were closing connections, there was a rare case that
2823 stomped on memory, triggering seg faults and asserts.
2824 - Avoid potential infinite recursion when building a descriptor. (We
2825 don't know that it ever happened, but better to fix it anyway.)
2826 - We were neglecting to unlink marked circuits from soon-to-close OR
2827 connections, which caused some rare scribbling on freed memory.
2828 - Fix a memory stomping race bug when closing the joining point of two
2829 rendezvous circuits.
2830 - Fix an assert in time parsing found by Steven Murdoch.
2832 o Other bugfixes on 0.1.0.x:
2833 - When we're doing reachability testing, provide more useful log
2834 messages so the operator knows what to expect.
2835 - Do not check whether DirPort is reachable when we are suppressing
2836 advertising it because of hibernation.
2837 - When building with -static or on Solaris, we sometimes needed -ldl.
2838 - When we're deciding whether a stream has enough circuits around
2839 that can handle it, count the freshly dirty ones and not the ones
2840 that are so dirty they won't be able to handle it.
2841 - When we're expiring old circuits, we had a logic error that caused
2842 us to close new rendezvous circuits rather than old ones.
2843 - Give a more helpful log message when you try to change ORPort via
2844 the controller: you should upgrade Tor if you want that to work.
2845 - We were failing to parse Tor versions that start with "Tor ".
2846 - Tolerate faulty streams better: when a stream fails for reason
2847 exitpolicy, stop assuming that the router is lying about his exit
2848 policy. When a stream fails for reason misc, allow it to retry just
2849 as if it was resolvefailed. When a stream has failed three times,
2850 reset its failure count so we can try again and get all three tries.
2853 Changes in version 0.1.1.10-alpha - 2005-12-11
2854 o Correctness bugfixes on 0.1.0.x:
2855 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
2856 corrupting the heap, losing FDs, or crashing when we need to resize
2857 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
2858 - Stop doing the complex voodoo overkill checking for insecure
2859 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
2860 - When we were closing connections, there was a rare case that
2861 stomped on memory, triggering seg faults and asserts.
2862 - We were neglecting to unlink marked circuits from soon-to-close OR
2863 connections, which caused some rare scribbling on freed memory.
2864 - When we're deciding whether a stream has enough circuits around
2865 that can handle it, count the freshly dirty ones and not the ones
2866 that are so dirty they won't be able to handle it.
2867 - Recover better from TCP connections to Tor servers that are
2868 broken but don't tell you (it happens!); and rotate TLS
2869 connections once a week.
2870 - When we're expiring old circuits, we had a logic error that caused
2871 us to close new rendezvous circuits rather than old ones.
2872 - Fix a scary-looking but apparently harmless bug where circuits
2873 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
2874 servers, and never switch to state CIRCUIT_STATE_OPEN.
2875 - When building with -static or on Solaris, we sometimes needed to
2877 - Give a useful message when people run Tor as the wrong user,
2878 rather than telling them to start chowning random directories.
2879 - We were failing to inform the controller about new .onion streams.
2881 o Security bugfixes on 0.1.0.x:
2882 - Refuse server descriptors if the fingerprint line doesn't match
2883 the included identity key. Tor doesn't care, but other apps (and
2884 humans) might actually be trusting the fingerprint line.
2885 - We used to kill the circuit when we receive a relay command we
2886 don't recognize. Now we just drop it.
2887 - Start obeying our firewall options more rigorously:
2888 . If we can't get to a dirserver directly, try going via Tor.
2889 . Don't ever try to connect (as a client) to a place our
2890 firewall options forbid.
2891 . If we specify a proxy and also firewall options, obey the
2892 firewall options even when we're using the proxy: some proxies
2893 can only proxy to certain destinations.
2894 - Fix a bug found by Lasse Overlier: when we were making internal
2895 circuits (intended to be cannibalized later for rendezvous and
2896 introduction circuits), we were picking them so that they had
2897 useful exit nodes. There was no need for this, and it actually
2898 aids some statistical attacks.
2899 - Start treating internal circuits and exit circuits separately.
2900 It's important to keep them separate because internal circuits
2901 have their last hops picked like middle hops, rather than like
2902 exit hops. So exiting on them will break the user's expectations.
2904 o Bugfixes on 0.1.1.x:
2905 - Take out the mis-feature where we tried to detect IP address
2906 flapping for people with DynDNS, and chose not to upload a new
2907 server descriptor sometimes.
2908 - Try to be compatible with OpenSSL 0.9.6 again.
2909 - Log fix: when the controller is logging about .onion addresses,
2910 sometimes it didn't include the ".onion" part of the address.
2911 - Don't try to modify options->DirServers internally -- if the
2912 user didn't specify any, just add the default ones directly to
2913 the trusted dirserver list. This fixes a bug where people running
2914 controllers would use SETCONF on some totally unrelated config
2915 option, and Tor would start yelling at them about changing their
2917 - Let the controller's redirectstream command specify a port, in
2918 case the controller wants to change that too.
2919 - When we requested a pile of server descriptors, we sometimes
2920 accidentally launched a duplicate request for the first one.
2921 - Bugfix for trackhostexits: write down the fingerprint of the
2922 chosen exit, not its nickname, because the chosen exit might not
2924 - When parsing foo.exit, if foo is unknown, and we are leaving
2925 circuits unattached, set the chosen_exit field and leave the
2926 address empty. This matters because controllers got confused
2928 - Directory authorities no longer try to download server
2929 descriptors that they know they will reject.
2931 o Features and updates:
2932 - Replace balanced trees with hash tables: this should make stuff
2933 significantly faster.
2934 - Resume using the AES counter-mode implementation that we ship,
2935 rather than OpenSSL's. Ours is significantly faster.
2936 - Many other CPU and memory improvements.
2937 - Add a new config option FastFirstHopPK (on by default) so clients
2938 do a trivial crypto handshake for their first hop, since TLS has
2939 already taken care of confidentiality and authentication.
2940 - Add a new config option TestSocks so people can see if their
2941 applications are using socks4, socks4a, socks5-with-ip, or
2942 socks5-with-hostname. This way they don't have to keep mucking
2943 with tcpdump and wondering if something got cached somewhere.
2944 - Warn when listening on a public address for socks. I suspect a
2945 lot of people are setting themselves up as open socks proxies,
2946 and they have no idea that jerks on the Internet are using them,
2947 since they simply proxy the traffic into the Tor network.
2948 - Add "private:*" as an alias in configuration for policies. Now
2949 you can simplify your exit policy rather than needing to list
2950 every single internal or nonroutable network space.
2951 - Add a new controller event type that allows controllers to get
2952 all server descriptors that were uploaded to a router in its role
2953 as authoritative dirserver.
2954 - Start shipping socks-extensions.txt, tor-doc-unix.html,
2955 tor-doc-server.html, and stylesheet.css in the tarball.
2956 - Stop shipping tor-doc.html in the tarball.
2959 Changes in version 0.1.1.9-alpha - 2005-11-15
2960 o Usability improvements:
2961 - Start calling it FooListenAddress rather than FooBindAddress,
2962 since few of our users know what it means to bind an address
2964 - Reduce clutter in server logs. We're going to try to make
2965 them actually usable now. New config option ProtocolWarnings that
2966 lets you hear about how _other Tors_ are breaking the protocol. Off
2968 - Divide log messages into logging domains. Once we put some sort
2969 of interface on this, it will let people looking at more verbose
2970 log levels specify the topics they want to hear more about.
2971 - Make directory servers return better http 404 error messages
2972 instead of a generic "Servers unavailable".
2973 - Check for even more Windows version flags when writing the platform
2974 string in server descriptors, and note any we don't recognize.
2975 - Clean up more of the OpenSSL memory when exiting, so we can detect
2976 memory leaks better.
2977 - Make directory authorities be non-versioning, non-naming by
2978 default. Now we can add new directory servers without requiring
2979 their operators to pay close attention.
2980 - When logging via syslog, include the pid whenever we provide
2981 a log entry. Suggested by Todd Fries.
2983 o Performance improvements:
2984 - Directory servers now silently throw away new descriptors that
2985 haven't changed much if the timestamps are similar. We do this to
2986 tolerate older Tor servers that upload a new descriptor every 15
2987 minutes. (It seemed like a good idea at the time.)
2988 - Inline bottleneck smartlist functions; use fast versions by default.
2989 - Add a "Map from digest to void*" abstraction digestmap_t so we
2990 can do less hex encoding/decoding. Use it in router_get_by_digest()
2991 to resolve a performance bottleneck.
2992 - Allow tor_gzip_uncompress to extract as much as possible from
2993 truncated compressed data. Try to extract as many
2994 descriptors as possible from truncated http responses (when
2995 DIR_PURPOSE_FETCH_ROUTERDESC).
2996 - Make circ->onionskin a pointer, not a static array. moria2 was using
2997 125000 circuit_t's after it had been up for a few weeks, which
2998 translates to 20+ megs of wasted space.
2999 - The private half of our EDH handshake keys are now chosen out
3000 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
3002 o Security improvements:
3003 - Start making directory caches retain old routerinfos, so soon
3004 clients can start asking by digest of descriptor rather than by
3005 fingerprint of server.
3006 - Add half our entropy from RAND_poll in OpenSSL. This knows how
3007 to use egd (if present), openbsd weirdness (if present), vms/os2
3008 weirdness (if we ever port there), and more in the future.
3010 o Bugfixes on 0.1.0.x:
3011 - Do round-robin writes of at most 16 kB per write. This might be
3012 more fair on loaded Tor servers, and it might resolve our Windows
3013 crash bug. It might also slow things down.
3014 - Our TLS handshakes were generating a single public/private
3015 keypair for the TLS context, rather than making a new one for
3016 each new connections. Oops. (But we were still rotating them
3017 periodically, so it's not so bad.)
3018 - When we were cannibalizing a circuit with a particular exit
3019 node in mind, we weren't checking to see if that exit node was
3020 already present earlier in the circuit. Oops.
3021 - When a Tor server's IP changes (e.g. from a dyndns address),
3022 upload a new descriptor so clients will learn too.
3023 - Really busy servers were keeping enough circuits open on stable
3024 connections that they were wrapping around the circuit_id
3025 space. (It's only two bytes.) This exposed a bug where we would
3026 feel free to reuse a circuit_id even if it still exists but has
3027 been marked for close. Try to fix this bug. Some bug remains.
3028 - If we would close a stream early (e.g. it asks for a .exit that
3029 we know would refuse it) but the LeaveStreamsUnattached config
3030 option is set by the controller, then don't close it.
3032 o Bugfixes on 0.1.1.8-alpha:
3033 - Fix a big pile of memory leaks, some of them serious.
3034 - Do not try to download a routerdesc if we would immediately reject
3036 - Resume inserting a newline between all router descriptors when
3037 generating (old style) signed directories, since our spec says
3039 - When providing content-type application/octet-stream for
3040 server descriptors using .z, we were leaving out the
3041 content-encoding header. Oops. (Everything tolerated this just
3042 fine, but that doesn't mean we need to be part of the problem.)
3043 - Fix a potential seg fault in getconf and getinfo using version 1
3044 of the controller protocol.
3045 - Avoid crash: do not check whether DirPort is reachable when we
3046 are suppressing it because of hibernation.
3047 - Make --hash-password not crash on exit.
3050 Changes in version 0.1.1.8-alpha - 2005-10-07
3051 o New features (major):
3052 - Clients don't download or use the directory anymore. Now they
3053 download and use network-statuses from the trusted dirservers,
3054 and fetch individual server descriptors as needed from mirrors.
3055 See dir-spec.txt for all the gory details.
3056 - Be more conservative about whether to advertise our DirPort.
3057 The main change is to not advertise if we're running at capacity
3058 and either a) we could hibernate or b) our capacity is low and
3059 we're using a default DirPort.
3060 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
3062 o New features (minor):
3063 - Try to be smart about when to retry network-status and
3064 server-descriptor fetches. Still needs some tuning.
3065 - Stop parsing, storing, or using running-routers output (but
3066 mirrors still cache and serve it).
3067 - Consider a threshold of versioning dirservers (dirservers who have
3068 an opinion about which Tor versions are still recommended) before
3069 deciding whether to warn the user that he's obsolete.
3070 - Dirservers can now reject/invalidate by key and IP, with the
3071 config options "AuthDirInvalid" and "AuthDirReject". This is
3072 useful since currently we automatically list servers as running
3073 and usable even if we know they're jerks.
3074 - Provide dire warnings to any users who set DirServer; move it out
3075 of torrc.sample and into torrc.complete.
3076 - Add MyFamily to torrc.sample in the server section.
3077 - Add nicknames to the DirServer line, so we can refer to them
3078 without requiring all our users to memorize their IP addresses.
3079 - When we get an EOF or a timeout on a directory connection, note
3080 how many bytes of serverdesc we are dropping. This will help
3081 us determine whether it is smart to parse incomplete serverdesc
3083 - Add a new function to "change pseudonyms" -- that is, to stop
3084 using any currently-dirty circuits for new streams, so we don't
3085 link new actions to old actions. Currently it's only called on
3086 HUP (or SIGNAL RELOAD).
3087 - On sighup, if UseHelperNodes changed to 1, use new circuits.
3088 - Start using RAND_bytes rather than RAND_pseudo_bytes from
3089 OpenSSL. Also, reseed our entropy every hour, not just at
3090 startup. And entropy in 512-bit chunks, not 160-bit chunks.
3092 o Fixes on 0.1.1.7-alpha:
3093 - Nobody ever implemented EVENT_ADDRMAP for control protocol
3094 version 0, so don't let version 0 controllers ask for it.
3095 - If you requested something with too many newlines via the
3096 v1 controller protocol, you could crash tor.
3097 - Fix a number of memory leaks, including some pretty serious ones.
3098 - Re-enable DirPort testing again, so Tor servers will be willing
3099 to advertise their DirPort if it's reachable.
3100 - On TLS handshake, only check the other router's nickname against
3101 its expected nickname if is_named is set.
3103 o Fixes forward-ported from 0.1.0.15:
3104 - Don't crash when we don't have any spare file descriptors and we
3105 try to spawn a dns or cpu worker.
3106 - Make the numbers in read-history and write-history into uint64s,
3107 so they don't overflow and publish negatives in the descriptor.
3110 - For the OS X package's modified privoxy config file, comment
3111 out the "logfile" line so we don't log everything passed
3113 - We were whining about using socks4 or socks5-with-local-lookup
3114 even when it's an IP in the "virtual" range we designed exactly
3116 - We were leaking some memory every time the client changes IPs.
3117 - Never call free() on tor_malloc()d memory. This will help us
3118 use dmalloc to detect memory leaks.
3119 - Check for named servers when looking them up by nickname;
3120 warn when we'recalling a non-named server by its nickname;
3121 don't warn twice about the same name.
3122 - Try to list MyFamily elements by key, not by nickname, and warn
3123 if we've not heard of the server.
3124 - Make windows platform detection (uname equivalent) smarter.
3125 - It turns out sparc64 doesn't like unaligned access either.
3128 Changes in version 0.1.0.15 - 2005-09-23
3129 o Bugfixes on 0.1.0.x:
3130 - Reject ports 465 and 587 (spam targets) in default exit policy.
3131 - Don't crash when we don't have any spare file descriptors and we
3132 try to spawn a dns or cpu worker.
3133 - Get rid of IgnoreVersion undocumented config option, and make us
3134 only warn, never exit, when we're running an obsolete version.
3135 - Don't try to print a null string when your server finds itself to
3136 be unreachable and the Address config option is empty.
3137 - Make the numbers in read-history and write-history into uint64s,
3138 so they don't overflow and publish negatives in the descriptor.
3139 - Fix a minor memory leak in smartlist_string_remove().
3140 - We were only allowing ourselves to upload a server descriptor at
3141 most every 20 minutes, even if it changed earlier than that.
3142 - Clean up log entries that pointed to old URLs.
3145 Changes in version 0.1.1.7-alpha - 2005-09-14
3146 o Fixes on 0.1.1.6-alpha:
3147 - Exit servers were crashing when people asked them to make a
3148 connection to an address not in their exit policy.
3149 - Looking up a non-existent stream for a v1 control connection would
3151 - Fix a seg fault if we ask a dirserver for a descriptor by
3152 fingerprint but he doesn't know about him.
3153 - SETCONF was appending items to linelists, not clearing them.
3154 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
3155 out and refuse the setconf if it would fail.
3156 - Downgrade the dirserver log messages when whining about
3160 - Add Peter Palfrader's check-tor script to tor/contrib/
3161 It lets you easily check whether a given server (referenced by
3162 nickname) is reachable by you.
3163 - Numerous changes to move towards client-side v2 directories. Not
3167 - If the user gave tor an odd number of command-line arguments,
3168 we were silently ignoring the last one. Now we complain and fail.
3169 [This wins the oldest-bug prize -- this bug has been present since
3170 November 2002, as released in Tor 0.0.0.]
3171 - Do not use unaligned memory access on alpha, mips, or mipsel.
3172 It *works*, but is very slow, so we treat them as if it doesn't.
3173 - Retry directory requests if we fail to get an answer we like
3174 from a given dirserver (we were retrying before, but only if
3175 we fail to connect).
3176 - When writing the RecommendedVersions line, sort them first.
3177 - When the client asked for a rendezvous port that the hidden
3178 service didn't want to provide, we were sending an IP address
3179 back along with the end cell. Fortunately, it was zero. But stop
3181 - Correct "your server is reachable" log entries to indicate that
3182 it was self-testing that told us so.
3185 Changes in version 0.1.1.6-alpha - 2005-09-09
3186 o Fixes on 0.1.1.5-alpha:
3187 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
3188 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
3189 - Fix bug with tor_memmem finding a match at the end of the string.
3190 - Make unit tests run without segfaulting.
3191 - Resolve some solaris x86 compile warnings.
3192 - Handle duplicate lines in approved-routers files without warning.
3193 - Fix bug where as soon as a server refused any requests due to his
3194 exit policy (e.g. when we ask for localhost and he tells us that's
3195 127.0.0.1 and he won't do it), we decided he wasn't obeying his
3196 exit policy using him for any exits.
3197 - Only do openssl hardware accelerator stuff if openssl version is
3200 o New controller features/fixes:
3201 - Add a "RESETCONF" command so you can set config options like
3202 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
3203 a config option in the torrc with no value, then it clears it
3204 entirely (rather than setting it to its default).
3205 - Add a "GETINFO config-file" to tell us where torrc is.
3206 - Avoid sending blank lines when GETINFO replies should be empty.
3207 - Add a QUIT command for the controller (for using it manually).
3208 - Fix a bug in SAVECONF that was adding default dirservers and
3209 other redundant entries to the torrc file.
3211 o Start on the new directory design:
3212 - Generate, publish, cache, serve new network-status format.
3213 - Publish individual descriptors (by fingerprint, by "all", and by
3215 - Publish client and server recommended versions separately.
3216 - Allow tor_gzip_uncompress() to handle multiple concatenated
3217 compressed strings. Serve compressed groups of router
3218 descriptors. The compression logic here could be more
3220 - Distinguish v1 authorities (all currently trusted directories)
3221 from v2 authorities (all trusted directories).
3222 - Change DirServers config line to note which dirs are v1 authorities.
3223 - Add configuration option "V1AuthoritativeDirectory 1" which
3224 moria1, moria2, and tor26 should set.
3225 - Remove option when getting directory cache to see whether they
3226 support running-routers; they all do now. Replace it with one
3227 to see whether caches support v2 stuff.
3230 - Dirservers now do their own external reachability testing of each
3231 Tor server, and only list them as running if they've been found to
3232 be reachable. We also send back warnings to the server's logs if
3233 it uploads a descriptor that we already believe is unreachable.
3234 - Implement exit enclaves: if we know an IP address for the
3235 destination, and there's a running Tor server at that address
3236 which allows exit to the destination, then extend the circuit to
3237 that exit first. This provides end-to-end encryption and end-to-end
3238 authentication. Also, if the user wants a .exit address or enclave,
3239 use 4 hops rather than 3, and cannibalize a general circ for it
3241 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
3242 controller. Also, rotate dns and cpu workers if the controller
3243 changes options that will affect them; and initialize the dns
3244 worker cache tree whether or not we start out as a server.
3245 - Only upload a new server descriptor when options change, 18
3246 hours have passed, uptime is reset, or bandwidth changes a lot.
3247 - Check [X-]Forwarded-For headers in HTTP requests when generating
3248 log messages. This lets people run dirservers (and caches) behind
3249 Apache but still know which IP addresses are causing warnings.
3251 o Config option changes:
3252 - Replace (Fascist)Firewall* config options with a new
3253 ReachableAddresses option that understands address policies.
3254 For example, "ReachableAddresses *:80,*:443"
3255 - Get rid of IgnoreVersion undocumented config option, and make us
3256 only warn, never exit, when we're running an obsolete version.
3257 - Make MonthlyAccountingStart config option truly obsolete now.
3260 - Reject ports 465 and 587 in the default exit policy, since
3261 people have started using them for spam too.
3262 - It turns out we couldn't bootstrap a network since we added
3263 reachability detection in 0.1.0.1-rc. Good thing the Tor network
3264 has never gone down. Add an AssumeReachable config option to let
3265 servers and dirservers bootstrap. When we're trying to build a
3266 high-uptime or high-bandwidth circuit but there aren't enough
3267 suitable servers, try being less picky rather than simply failing.
3268 - Our logic to decide if the OR we connected to was the right guy
3269 was brittle and maybe open to a mitm for unverified routers.
3270 - We weren't cannibalizing circuits correctly for
3271 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
3272 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
3273 build those from scratch. This should make hidden services faster.
3274 - Predict required circuits better, with an eye toward making hidden
3275 services faster on the service end.
3276 - Retry streams if the exit node sends back a 'misc' failure. This
3277 should result in fewer random failures. Also, after failing
3278 from resolve failed or misc, reset the num failures, so we give
3279 it a fair shake next time we try.
3280 - Clean up the rendezvous warn log msgs, and downgrade some to info.
3281 - Reduce severity on logs about dns worker spawning and culling.
3282 - When we're shutting down and we do something like try to post a
3283 server descriptor or rendezvous descriptor, don't complain that
3284 we seem to be unreachable. Of course we are, we're shutting down.
3285 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
3286 We don't use them yet, but maybe one day our DNS resolver will be
3287 able to discover them.
3288 - Make ContactInfo mandatory for authoritative directory servers.
3289 - Require server descriptors to list IPv4 addresses -- hostnames
3290 are no longer allowed. This also fixes some potential security
3291 problems with people providing hostnames as their address and then
3292 preferentially resolving them to partition users.
3293 - Change log line for unreachability to explicitly suggest /etc/hosts
3294 as the culprit. Also make it clearer what IP address and ports we're
3295 testing for reachability.
3296 - Put quotes around user-supplied strings when logging so users are
3297 more likely to realize if they add bad characters (like quotes)
3299 - Let auth dir servers start without specifying an Address config
3301 - Make unit tests (and other invocations that aren't the real Tor)
3302 run without launching listeners, creating subdirectories, and so on.
3305 Changes in version 0.1.1.5-alpha - 2005-08-08
3306 o Bugfixes included in 0.1.0.14.
3308 o Bugfixes on 0.1.0.x:
3309 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
3310 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
3311 it would silently using ignore the 6668.
3314 Changes in version 0.1.0.14 - 2005-08-08
3315 o Bugfixes on 0.1.0.x:
3316 - Fix the other half of the bug with crypto handshakes
3318 - Fix an assert trigger if you send a 'signal term' via the
3319 controller when it's listening for 'event info' messages.
3322 Changes in version 0.1.1.4-alpha - 2005-08-04
3323 o Bugfixes included in 0.1.0.13.
3326 - Improve tor_gettimeofday() granularity on windows.
3327 - Make clients regenerate their keys when their IP address changes.
3328 - Implement some more GETINFO goodness: expose helper nodes, config
3329 options, getinfo keys.
3332 Changes in version 0.1.0.13 - 2005-08-04
3333 o Bugfixes on 0.1.0.x:
3334 - Fix a critical bug in the security of our crypto handshakes.
3335 - Fix a size_t underflow in smartlist_join_strings2() that made
3336 it do bad things when you hand it an empty smartlist.
3337 - Fix Windows installer to ship Tor license (thanks to Aphex for
3338 pointing out this oversight) and put a link to the doc directory
3340 - Explicitly set no-unaligned-access for sparc: it turns out the
3341 new gcc's let you compile broken code, but that doesn't make it
3345 Changes in version 0.1.1.3-alpha - 2005-07-23
3346 o Bugfixes on 0.1.1.2-alpha:
3347 - Fix a bug in handling the controller's "post descriptor"
3349 - Fix several bugs in handling the controller's "extend circuit"
3351 - Fix a bug in handling the controller's "stream status" event.
3352 - Fix an assert failure if we have a controller listening for
3353 circuit events and we go offline.
3354 - Re-allow hidden service descriptors to publish 0 intro points.
3355 - Fix a crash when generating your hidden service descriptor if
3356 you don't have enough intro points already.
3358 o New features on 0.1.1.2-alpha:
3359 - New controller function "getinfo accounting", to ask how
3360 many bytes we've used in this time period.
3361 - Experimental support for helper nodes: a lot of the risk from
3362 a small static adversary comes because users pick new random
3363 nodes every time they rebuild a circuit. Now users will try to
3364 stick to the same small set of entry nodes if they can. Not
3365 enabled by default yet.
3367 o Bugfixes on 0.1.0.12:
3368 - If you're an auth dir server, always publish your dirport,
3369 even if you haven't yet found yourself to be reachable.
3370 - Fix a size_t underflow in smartlist_join_strings2() that made
3371 it do bad things when you hand it an empty smartlist.
3374 Changes in version 0.1.0.12 - 2005-07-18
3375 o New directory servers:
3376 - tor26 has changed IP address.
3378 o Bugfixes on 0.1.0.x:
3379 - Fix a possible double-free in tor_gzip_uncompress().
3380 - When --disable-threads is set, do not search for or link against
3382 - Don't trigger an assert if an authoritative directory server
3383 claims its dirport is 0.
3384 - Fix bug with removing Tor as an NT service: some people were
3385 getting "The service did not return an error." Thanks to Matt
3389 Changes in version 0.1.1.2-alpha - 2005-07-15
3390 o New directory servers:
3391 - tor26 has changed IP address.
3393 o Bugfixes on 0.1.0.x, crashes/leaks:
3394 - Port the servers-not-obeying-their-exit-policies fix from
3396 - Fix an fd leak in start_daemon().
3397 - On Windows, you can't always reopen a port right after you've
3398 closed it. So change retry_listeners() to only close and re-open
3399 ports that have changed.
3400 - Fix a possible double-free in tor_gzip_uncompress().
3402 o Bugfixes on 0.1.0.x, usability:
3403 - When tor_socketpair() fails in Windows, give a reasonable
3404 Windows-style errno back.
3405 - Let people type "tor --install" as well as "tor -install" when
3407 want to make it an NT service.
3408 - NT service patch from Matt Edman to improve error messages.
3409 - When the controller asks for a config option with an abbreviated
3410 name, give the full name in our response.
3411 - Correct the man page entry on TrackHostExitsExpire.
3412 - Looks like we were never delivering deflated (i.e. compressed)
3413 running-routers lists, even when asked. Oops.
3414 - When --disable-threads is set, do not search for or link against
3417 o Bugfixes on 0.1.1.x:
3418 - Fix a seg fault with autodetecting which controller version is
3422 - New hidden service descriptor format: put a version in it, and
3423 let people specify introduction/rendezvous points that aren't
3424 in "the directory" (which is subjective anyway).
3425 - Allow the DEBUG controller event to work again. Mark certain log
3426 entries as "don't tell this to controllers", so we avoid cycles.
3429 Changes in version 0.1.0.11 - 2005-06-30
3430 o Bugfixes on 0.1.0.x:
3431 - Fix major security bug: servers were disregarding their
3432 exit policies if clients behaved unexpectedly.
3433 - Make OS X init script check for missing argument, so we don't
3434 confuse users who invoke it incorrectly.
3435 - Fix a seg fault in "tor --hash-password foo".
3436 - The MAPADDRESS control command was broken.
3439 Changes in version 0.1.1.1-alpha - 2005-06-29
3441 - Make OS X init script check for missing argument, so we don't
3442 confuse users who invoke it incorrectly.
3443 - Fix a seg fault in "tor --hash-password foo".
3444 - Fix a possible way to DoS dirservers.
3445 - When we complain that your exit policy implicitly allows local or
3446 private address spaces, name them explicitly so operators can
3448 - Make the log message less scary when all the dirservers are
3449 temporarily unreachable.
3450 - We were printing the number of idle dns workers incorrectly when
3454 - Revised controller protocol (version 1) that uses ascii rather
3455 than binary. Add supporting libraries in python and java so you
3456 can use the controller from your applications without caring how
3458 - Spiffy new support for crypto hardware accelerators. Can somebody
3462 Changes in version 0.0.9.10 - 2005-06-16
3463 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
3464 - Refuse relay cells that claim to have a length larger than the
3465 maximum allowed. This prevents a potential attack that could read
3466 arbitrary memory (e.g. keys) from an exit server's process
3470 Changes in version 0.1.0.10 - 2005-06-14
3471 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
3472 libevent before 1.1a.
3475 Changes in version 0.1.0.9-rc - 2005-06-09
3477 - Reset buf->highwater every time buf_shrink() is called, not just on
3478 a successful shrink. This was causing significant memory bloat.
3479 - Fix buffer overflow when checking hashed passwords.
3480 - Security fix: if seeding the RNG on Win32 fails, quit.
3481 - Allow seeding the RNG on Win32 even when you're not running as
3483 - Disable threading on Solaris too. Something is wonky with it,
3484 cpuworkers, and reentrant libs.
3485 - Reenable the part of the code that tries to flush as soon as an
3486 OR outbuf has a full TLS record available. Perhaps this will make
3487 OR outbufs not grow as huge except in rare cases, thus saving lots
3488 of CPU time plus memory.
3489 - Reject malformed .onion addresses rather then passing them on as
3490 normal web requests.
3491 - Adapt patch from Adam Langley: fix possible memory leak in
3492 tor_lookup_hostname().
3493 - Initialize libevent later in the startup process, so the logs are
3494 already established by the time we start logging libevent warns.
3495 - Use correct errno on win32 if libevent fails.
3496 - Check and warn about known-bad/slow libevent versions.
3497 - Pay more attention to the ClientOnly config option.
3498 - Have torctl.in/tor.sh.in check for location of su binary (needed
3500 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
3501 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
3502 HttpProxyAuthenticator
3503 - Stop warning about sigpipes in the logs. We're going to
3504 pretend that getting these occassionally is normal and fine.
3505 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
3507 installer screens; and don't put stuff into StartupItems unless
3508 the user asks you to.
3509 - Require servers that use the default dirservers to have public IP
3510 addresses. We have too many servers that are configured with private
3511 IPs and their admins never notice the log entries complaining that
3512 their descriptors are being rejected.
3513 - Add OSX uninstall instructions. An actual uninstall script will
3517 Changes in version 0.1.0.8-rc - 2005-05-23
3519 - It turns out that kqueue on OS X 10.3.9 was causing kernel
3520 panics. Disable kqueue on all OS X Tors.
3521 - Fix RPM: remove duplicate line accidentally added to the rpm
3523 - Disable threads on openbsd too, since its gethostaddr is not
3525 - Tolerate libevent 0.8 since it still works, even though it's
3527 - Enable building on Red Hat 9.0 again.
3528 - Allow the middle hop of the testing circuit to be running any
3529 version, now that most of them have the bugfix to let them connect
3530 to unknown servers. This will allow reachability testing to work
3531 even when 0.0.9.7-0.0.9.9 become obsolete.
3532 - Handle relay cells with rh.length too large. This prevents
3533 a potential attack that could read arbitrary memory (maybe even
3534 keys) from the exit server's process.
3535 - We screwed up the dirport reachability testing when we don't yet
3536 have a cached version of the directory. Hopefully now fixed.
3537 - Clean up router_load_single_router() (used by the controller),
3538 so it doesn't seg fault on error.
3539 - Fix a minor memory leak when somebody establishes an introduction
3540 point at your Tor server.
3541 - If a socks connection ends because read fails, don't warn that
3542 you're not sending a socks reply back.
3545 - Add HttpProxyAuthenticator config option too, that works like
3546 the HttpsProxyAuthenticator config option.
3547 - Encode hashed controller passwords in hex instead of base64,
3548 to make it easier to write controllers.
3551 Changes in version 0.1.0.7-rc - 2005-05-17
3553 - Fix a bug in the OS X package installer that prevented it from
3554 installing on Tiger.
3555 - Fix a script bug in the OS X package installer that made it
3556 complain during installation.
3557 - Find libevent even if it's hiding in /usr/local/ and your
3558 CFLAGS and LDFLAGS don't tell you to look there.
3559 - Be able to link with libevent as a shared library (the default
3560 after 1.0d), even if it's hiding in /usr/local/lib and even
3561 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
3562 assuming you're running gcc. Otherwise fail and give a useful
3564 - Fix a bug in the RPM packager: set home directory for _tor to
3565 something more reasonable when first installing.
3566 - Free a minor amount of memory that is still reachable on exit.
3569 Changes in version 0.1.0.6-rc - 2005-05-14
3571 - Implement --disable-threads configure option. Disable threads on
3572 netbsd by default, because it appears to have no reentrant resolver
3574 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
3575 release (1.1) detects and disables kqueue if it's broken.
3576 - Append default exit policy before checking for implicit internal
3577 addresses. Now we don't log a bunch of complaints on startup
3578 when using the default exit policy.
3579 - Some people were putting "Address " in their torrc, and they had
3580 a buggy resolver that resolved " " to 0.0.0.0. Oops.
3581 - If DataDir is ~/.tor, and that expands to /.tor, then default to
3582 LOCALSTATEDIR/tor instead.
3583 - Fix fragmented-message bug in TorControl.py.
3584 - Resolve a minor bug which would prevent unreachable dirports
3585 from getting suppressed in the published descriptor.
3586 - When the controller gave us a new descriptor, we weren't resolving
3587 it immediately, so Tor would think its address was 0.0.0.0 until
3588 we fetched a new directory.
3589 - Fix an uppercase/lowercase case error in suppressing a bogus
3590 libevent warning on some Linuxes.
3593 - Begin scrubbing sensitive strings from logs by default. Turn off
3594 the config option SafeLogging if you need to do debugging.
3595 - Switch to a new buffer management algorithm, which tries to avoid
3596 reallocing and copying quite as much. In first tests it looks like
3597 it uses *more* memory on average, but less cpu.
3598 - First cut at support for "create-fast" cells. Clients can use
3599 these when extending to their first hop, since the TLS already
3600 provides forward secrecy and authentication. Not enabled on
3602 - When dirservers refuse a router descriptor, we now log its
3603 contactinfo, platform, and the poster's IP address.
3604 - Call tor_free_all instead of connections_free_all after forking, to
3605 save memory on systems that need to fork.
3606 - Whine at you if you're a server and you don't set your contactinfo.
3607 - Implement --verify-config command-line option to check if your torrc
3608 is valid without actually launching Tor.
3609 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
3610 rather than just rejecting it.
3613 Changes in version 0.1.0.5-rc - 2005-04-27
3615 - Stop trying to print a null pointer if an OR conn fails because
3616 we didn't like its cert.
3618 - Switch our internal buffers implementation to use a ring buffer,
3619 to hopefully improve performance for fast servers a lot.
3620 - Add HttpsProxyAuthenticator support (basic auth only), based
3621 on patch from Adam Langley.
3622 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
3623 the fast servers that have been joining lately.
3624 - Give hidden service accesses extra time on the first attempt,
3625 since 60 seconds is often only barely enough. This might improve
3627 - Improve performance for dirservers: stop re-parsing the whole
3628 directory every time you regenerate it.
3629 - Add more debugging info to help us find the weird dns freebsd
3630 pthreads bug; cleaner debug messages to help track future issues.
3633 Changes in version 0.0.9.9 - 2005-04-23
3634 o Bugfixes on 0.0.9.x:
3635 - If unofficial Tor clients connect and send weird TLS certs, our
3636 Tor server triggers an assert. This release contains a minimal
3637 backport from the broader fix that we put into 0.1.0.4-rc.
3640 Changes in version 0.1.0.4-rc - 2005-04-23
3642 - If unofficial Tor clients connect and send weird TLS certs, our
3643 Tor server triggers an assert. Stop asserting, and start handling
3644 TLS errors better in other situations too.
3645 - When the controller asks us to tell it about all the debug-level
3646 logs, it turns out we were generating debug-level logs while
3647 telling it about them, which turns into a bad loop. Now keep
3648 track of whether you're sending a debug log to the controller,
3649 and don't log when you are.
3650 - Fix the "postdescriptor" feature of the controller interface: on
3651 non-complete success, only say "done" once.
3653 - Clients are now willing to load balance over up to 2mB, not 1mB,
3654 of advertised bandwidth capacity.
3655 - Add a NoPublish config option, so you can be a server (e.g. for
3656 testing running Tor servers in other Tor networks) without
3657 publishing your descriptor to the primary dirservers.
3660 Changes in version 0.1.0.3-rc - 2005-04-08
3661 o Improvements on 0.1.0.2-rc:
3662 - Client now retries when streams end early for 'hibernating' or
3663 'resource limit' reasons, rather than failing them.
3664 - More automated handling for dirserver operators:
3665 - Automatically approve nodes running 0.1.0.2-rc or later,
3666 now that the the reachability detection stuff is working.
3667 - Now we allow two unverified servers with the same nickname
3668 but different keys. But if a nickname is verified, only that
3669 nickname+key are allowed.
3670 - If you're an authdirserver connecting to an address:port,
3671 and it's not the OR you were expecting, forget about that
3672 descriptor. If he *was* the one you were expecting, then forget
3673 about all other descriptors for that address:port.
3674 - Allow servers to publish descriptors from 12 hours in the future.
3675 Corollary: only whine about clock skew from the dirserver if
3676 he's a trusted dirserver (since now even verified servers could
3677 have quite wrong clocks).
3678 - Adjust maximum skew and age for rendezvous descriptors: let skew
3679 be 48 hours rather than 90 minutes.
3680 - Efficiency improvements:
3681 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
3682 it much faster to look up a circuit for each relay cell.
3683 - Remove most calls to assert_all_pending_dns_resolves_ok(),
3684 since they're eating our cpu on exit nodes.
3685 - Stop wasting time doing a case insensitive comparison for every
3686 dns name every time we do any lookup. Canonicalize the names to
3687 lowercase and be done with it.
3688 - Start sending 'truncated' cells back rather than destroy cells,
3689 if the circuit closes in front of you. This means we won't have
3690 to abandon partially built circuits.
3691 - Only warn once per nickname from add_nickname_list_to_smartlist
3692 per failure, so an entrynode or exitnode choice that's down won't
3694 - Put a note in the torrc about abuse potential with the default
3696 - Revise control spec and implementation to allow all log messages to
3697 be sent to controller with their severities intact (suggested by
3698 Matt Edman). Update TorControl to handle new log event types.
3699 - Provide better explanation messages when controller's POSTDESCRIPTOR
3701 - Stop putting nodename in the Platform string in server descriptors.
3702 It doesn't actually help, and it is confusing/upsetting some people.
3704 o Bugfixes on 0.1.0.2-rc:
3705 - We were printing the host mask wrong in exit policies in server
3706 descriptors. This isn't a critical bug though, since we were still
3707 obeying the exit policy internally.
3708 - Fix Tor when compiled with libevent but without pthreads: move
3709 connection_unregister() from _connection_free() to
3711 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
3712 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
3713 when we look through the connection array, we'll find any of the
3714 cpu/dnsworkers. This is no good.
3716 o Bugfixes on 0.0.9.8:
3717 - Fix possible bug on threading platforms (e.g. win32) which was
3718 leaking a file descriptor whenever a cpuworker or dnsworker died.
3719 - When using preferred entry or exit nodes, ignore whether the
3720 circuit wants uptime or capacity. They asked for the nodes, they
3722 - chdir() to your datadirectory at the *end* of the daemonize process,
3723 not the beginning. This was a problem because the first time you
3724 run tor, if your datadir isn't there, and you have runasdaemon set
3725 to 1, it will try to chdir to it before it tries to create it. Oops.
3726 - Handle changed router status correctly when dirserver reloads
3727 fingerprint file. We used to be dropping all unverified descriptors
3728 right then. The bug was hidden because we would immediately
3729 fetch a directory from another dirserver, which would include the
3730 descriptors we just dropped.
3731 - When we're connecting to an OR and he's got a different nickname/key
3732 than we were expecting, only complain loudly if we're an OP or a
3733 dirserver. Complaining loudly to the OR admins just confuses them.
3734 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
3735 artificially capped at 500kB.
3738 Changes in version 0.0.9.8 - 2005-04-07
3739 o Bugfixes on 0.0.9.x:
3740 - We have a bug that I haven't found yet. Sometimes, very rarely,
3741 cpuworkers get stuck in the 'busy' state, even though the cpuworker
3742 thinks of itself as idle. This meant that no new circuits ever got
3743 established. Here's a workaround to kill any cpuworker that's been
3744 busy for more than 100 seconds.
3747 Changes in version 0.1.0.2-rc - 2005-04-01
3748 o Bugfixes on 0.1.0.1-rc:
3749 - Fixes on reachability detection:
3750 - Don't check for reachability while hibernating.
3751 - If ORPort is reachable but DirPort isn't, still publish the
3752 descriptor, but zero out DirPort until it's found reachable.
3753 - When building testing circs for ORPort testing, use only
3754 high-bandwidth nodes, so fewer circuits fail.
3755 - Complain about unreachable ORPort separately from unreachable
3756 DirPort, so the user knows what's going on.
3757 - Make sure we only conclude ORPort reachability if we didn't
3758 initiate the conn. Otherwise we could falsely conclude that
3759 we're reachable just because we connected to the guy earlier
3760 and he used that same pipe to extend to us.
3761 - Authdirservers shouldn't do ORPort reachability detection,
3762 since they're in clique mode, so it will be rare to find a
3763 server not already connected to them.
3764 - When building testing circuits, always pick middle hops running
3765 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
3766 bug. (This is a kludge; it will go away when 0.0.9.x becomes
3768 - When we decide we're reachable, actually publish our descriptor
3770 - Fix bug in redirectstream in the controller.
3771 - Fix the state descriptor strings so logs don't claim edge streams
3772 are in a different state than they actually are.
3773 - Use recent libevent features when possible (this only really affects
3774 win32 and osx right now, because the new libevent with these
3775 features hasn't been released yet). Add code to suppress spurious
3777 - Prevent possible segfault in connection_close_unattached_ap().
3778 - Fix newlines on torrc in win32.
3779 - Improve error msgs when tor-resolve fails.
3781 o Improvements on 0.0.9.x:
3782 - New experimental script tor/contrib/ExerciseServer.py (needs more
3783 work) that uses the controller interface to build circuits and
3784 fetch pages over them. This will help us bootstrap servers that
3785 have lots of capacity but haven't noticed it yet.
3786 - New experimental script tor/contrib/PathDemo.py (needs more work)
3787 that uses the controller interface to let you choose whole paths
3789 "<hostname>.<path,separated by dots>.<length of path>.path"
3790 - When we've connected to an OR and handshaked but didn't like
3791 the result, we were closing the conn without sending destroy
3792 cells back for pending circuits. Now send those destroys.
3795 Changes in version 0.0.9.7 - 2005-04-01
3796 o Bugfixes on 0.0.9.x:
3797 - Fix another race crash bug (thanks to Glenn Fink for reporting).
3798 - Compare identity to identity, not to nickname, when extending to
3799 a router not already in the directory. This was preventing us from
3800 extending to unknown routers. Oops.
3801 - Make sure to create OS X Tor user in <500 range, so we aren't
3802 creating actual system users.
3803 - Note where connection-that-hasn't-sent-end was marked, and fix
3804 a few really loud instances of this harmless bug (it's fixed more
3808 Changes in version 0.1.0.1-rc - 2005-03-28
3810 - Add reachability testing. Your Tor server will automatically try
3811 to see if its ORPort and DirPort are reachable from the outside,
3812 and it won't upload its descriptor until it decides they are.
3813 - Handle unavailable hidden services better. Handle slow or busy
3814 hidden services better.
3815 - Add support for CONNECTing through https proxies, with "HttpsProxy"
3817 - New exit policy: accept most low-numbered ports, rather than
3818 rejecting most low-numbered ports.
3819 - More Tor controller support (still experimental). See
3820 http://tor.eff.org/doc/control-spec.txt for all the new features,
3821 including signals to emulate unix signals from any platform;
3822 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
3823 closestream; closecircuit; etc.
3824 - Make nt services work and start on startup on win32 (based on
3825 patch by Matt Edman).
3826 - Add a new AddressMap config directive to rewrite incoming socks
3827 addresses. This lets you, for example, declare an implicit
3828 required exit node for certain sites.
3829 - Add a new TrackHostExits config directive to trigger addressmaps
3830 for certain incoming socks addresses -- for sites that break when
3831 your exit keeps changing (based on patch by Mike Perry).
3832 - Redo the client-side dns cache so it's just an addressmap too.
3833 - Notice when our IP changes, and reset stats/uptime/reachability.
3834 - When an application is using socks5, give him the whole variety of
3835 potential socks5 responses (connect refused, host unreachable, etc),
3836 rather than just "success" or "failure".
3837 - A more sane version numbering system. See
3838 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
3839 - New contributed script "exitlist": a simple python script to
3840 parse directories and find Tor nodes that exit to listed
3842 - New contributed script "privoxy-tor-toggle" to toggle whether
3843 Privoxy uses Tor. Seems to be configured for Debian by default.
3844 - Report HTTP reasons to client when getting a response from directory
3845 servers -- so you can actually know what went wrong.
3846 - New config option MaxAdvertisedBandwidth which lets you advertise
3847 a low bandwidthrate (to not attract as many circuits) while still
3848 allowing a higher bandwidthrate in reality.
3850 o Robustness/stability fixes:
3851 - Make Tor use Niels Provos's libevent instead of its current
3852 poll-but-sometimes-select mess. This will let us use faster async
3853 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
3855 - pthread support now too. This was forced because when we forked,
3856 we ended up wasting a lot of duplicate ram over time. Also switch
3857 to foo_r versions of some library calls to allow reentry and
3859 - Better handling for heterogeneous / unreliable nodes:
3860 - Annotate circuits w/ whether they aim to contain high uptime nodes
3861 and/or high capacity nodes. When building circuits, choose
3863 - This means that every single node in an intro rend circuit,
3864 not just the last one, will have a minimum uptime.
3865 - New config option LongLivedPorts to indicate application streams
3866 that will want high uptime circuits.
3867 - Servers reset uptime when a dir fetch entirely fails. This
3868 hopefully reflects stability of the server's network connectivity.
3869 - If somebody starts his tor server in Jan 2004 and then fixes his
3870 clock, don't make his published uptime be a year.
3871 - Reset published uptime when you wake up from hibernation.
3872 - Introduce a notion of 'internal' circs, which are chosen without
3873 regard to the exit policy of the last hop. Intro and rendezvous
3874 circs must be internal circs, to avoid leaking information. Resolve
3875 and connect streams can use internal circs if they want.
3876 - New circuit pooling algorithm: make sure to have enough circs around
3877 to satisfy any predicted ports, and also make sure to have 2 internal
3878 circs around if we've required internal circs lately (and with high
3879 uptime if we've seen that lately too).
3880 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
3881 which describes how often we retry making new circuits if current
3882 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
3883 how long we're willing to make use of an already-dirty circuit.
3884 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
3885 circ as necessary, if there are any completed ones lying around
3886 when we try to launch one.
3887 - Make hidden services try to establish a rendezvous for 30 seconds,
3888 rather than for n (where n=3) attempts to build a circuit.
3889 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
3890 "ShutdownWaitLength".
3891 - Try to be more zealous about calling connection_edge_end when
3892 things go bad with edge conns in connection.c.
3893 - Revise tor-spec to add more/better stream end reasons.
3894 - Revise all calls to connection_edge_end to avoid sending "misc",
3895 and to take errno into account where possible.
3898 - Fix a race condition that can trigger an assert, when we have a
3899 pending create cell and an OR connection fails right then.
3900 - Fix several double-mark-for-close bugs, e.g. where we were finding
3901 a conn for a cell even if that conn is already marked for close.
3902 - Make sequence of log messages when starting on win32 with no config
3903 file more reasonable.
3904 - When choosing an exit node for a new non-internal circ, don't take
3905 into account whether it'll be useful for any pending x.onion
3906 addresses -- it won't.
3907 - Turn addr_policy_compare from a tristate to a quadstate; this should
3908 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
3909 for google.com" problem.
3910 - Make "platform" string in descriptor more accurate for Win32 servers,
3911 so it's not just "unknown platform".
3912 - Fix an edge case in parsing config options (thanks weasel).
3913 If they say "--" on the commandline, it's not an option.
3914 - Reject odd-looking addresses at the client (e.g. addresses that
3915 contain a colon), rather than having the server drop them because
3917 - tor-resolve requests were ignoring .exit if there was a working circuit
3918 they could use instead.
3919 - REUSEADDR on normal platforms means you can rebind to the port
3920 right after somebody else has let it go. But REUSEADDR on win32
3921 means to let you bind to the port _even when somebody else
3922 already has it bound_! So, don't do that on Win32.
3923 - Change version parsing logic: a version is "obsolete" if it is not
3924 recommended and (1) there is a newer recommended version in the
3925 same series, or (2) there are no recommended versions in the same
3926 series, but there are some recommended versions in a newer series.
3927 A version is "new" if it is newer than any recommended version in
3929 - Stop most cases of hanging up on a socks connection without sending
3933 - Require BandwidthRate to be at least 20kB/s for servers.
3934 - When a dirserver causes you to give a warn, mention which dirserver
3936 - New config option DirAllowPrivateAddresses for authdirservers.
3937 Now by default they refuse router descriptors that have non-IP or
3938 private-IP addresses.
3939 - Stop publishing socksport in the directory, since it's not
3940 actually meant to be public. For compatibility, publish a 0 there
3942 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
3943 smart" value, that is low for servers and high for clients.
3944 - If our clock jumps forward by 100 seconds or more, assume something
3945 has gone wrong with our network and abandon all not-yet-used circs.
3946 - Warn when exit policy implicitly allows local addresses.
3947 - If we get an incredibly skewed timestamp from a dirserver mirror
3948 that isn't a verified OR, don't warn -- it's probably him that's
3950 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
3951 cookies to disk and doesn't log each web request to disk. (Thanks
3952 to Brett Carrington for pointing this out.)
3953 - When a client asks us for a dir mirror and we don't have one,
3954 launch an attempt to get a fresh one.
3955 - If we're hibernating and we get a SIGINT, exit immediately.
3956 - Add --with-dmalloc ./configure option, to track memory leaks.
3957 - And try to free all memory on closing, so we can detect what
3959 - Cache local dns resolves correctly even when they're .exit
3961 - Give a better warning when some other server advertises an
3962 ORPort that is actually an apache running ssl.
3963 - Add "opt hibernating 1" to server descriptor to make it clearer
3964 whether the server is hibernating.
3967 Changes in version 0.0.9.6 - 2005-03-24
3968 o Bugfixes on 0.0.9.x (crashes and asserts):
3969 - Add new end stream reasons to maintainance branch. Fix bug where
3970 reason (8) could trigger an assert. Prevent bug from recurring.
3971 - Apparently win32 stat wants paths to not end with a slash.
3972 - Fix assert triggers in assert_cpath_layer_ok(), where we were
3973 blowing away the circuit that conn->cpath_layer points to, then
3974 checking to see if the circ is well-formed. Backport check to make
3975 sure we dont use the cpath on a closed connection.
3976 - Prevent circuit_resume_edge_reading_helper() from trying to package
3977 inbufs for marked-for-close streams.
3978 - Don't crash on hup if your options->address has become unresolvable.
3979 - Some systems (like OS X) sometimes accept() a connection and tell
3980 you the remote host is 0.0.0.0:0. If this happens, due to some
3981 other mis-features, we get confused; so refuse the conn for now.
3983 o Bugfixes on 0.0.9.x (other):
3984 - Fix harmless but scary "Unrecognized content encoding" warn message.
3985 - Add new stream error reason: TORPROTOCOL reason means "you are not
3986 speaking a version of Tor I understand; say bye-bye to your stream."
3987 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
3988 into the future, now that we are more tolerant of skew. This
3989 resolves a bug where a Tor server would refuse to cache a directory
3990 because all the directories it gets are too far in the future;
3991 yet the Tor server never logs any complaints about clock skew.
3992 - Mac packaging magic: make man pages useable, and do not overwrite
3993 existing torrc files.
3994 - Make OS X log happily to /var/log/tor/tor.log
3997 Changes in version 0.0.9.5 - 2005-02-22
3998 o Bugfixes on 0.0.9.x:
3999 - Fix an assert race at exit nodes when resolve requests fail.
4000 - Stop picking unverified dir mirrors--it only leads to misery.
4001 - Patch from Matt Edman to make NT services work better. Service
4002 support is still not compiled into the executable by default.
4003 - Patch from Dmitri Bely so the Tor service runs better under
4004 the win32 SYSTEM account.
4005 - Make tor-resolve actually work (?) on Win32.
4006 - Fix a sign bug when getrlimit claims to have 4+ billion
4007 file descriptors available.
4008 - Stop refusing to start when bandwidthburst == bandwidthrate.
4009 - When create cells have been on the onion queue more than five
4010 seconds, just send back a destroy and take them off the list.
4013 Changes in version 0.0.9.4 - 2005-02-03
4014 o Bugfixes on 0.0.9:
4015 - Fix an assert bug that took down most of our servers: when
4016 a server claims to have 1 GB of bandwidthburst, don't
4018 - Don't crash as badly if we have spawned the max allowed number
4019 of dnsworkers, or we're out of file descriptors.
4020 - Block more file-sharing ports in the default exit policy.
4021 - MaxConn is now automatically set to the hard limit of max
4022 file descriptors we're allowed (ulimit -n), minus a few for
4024 - Give a clearer message when servers need to raise their
4025 ulimit -n when they start running out of file descriptors.
4026 - SGI Compatibility patches from Jan Schaumann.
4027 - Tolerate a corrupt cached directory better.
4028 - When a dirserver hasn't approved your server, list which one.
4029 - Go into soft hibernation after 95% of the bandwidth is used,
4030 not 99%. This is especially important for daily hibernators who
4031 have a small accounting max. Hopefully it will result in fewer
4032 cut connections when the hard hibernation starts.
4033 - Load-balance better when using servers that claim more than
4034 800kB/s of capacity.
4035 - Make NT services work (experimental, only used if compiled in).
4038 Changes in version 0.0.9.3 - 2005-01-21
4039 o Bugfixes on 0.0.9:
4040 - Backport the cpu use fixes from main branch, so busy servers won't
4041 need as much processor time.
4042 - Work better when we go offline and then come back, or when we
4043 run Tor at boot before the network is up. We do this by
4044 optimistically trying to fetch a new directory whenever an
4045 application request comes in and we think we're offline -- the
4046 human is hopefully a good measure of when the network is back.
4047 - Backport some minimal hidserv bugfixes: keep rend circuits open as
4048 long as you keep using them; actually publish hidserv descriptors
4049 shortly after they change, rather than waiting 20-40 minutes.
4050 - Enable Mac startup script by default.
4051 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
4052 - When you update AllowUnverifiedNodes or FirewallPorts via the
4053 controller's setconf feature, we were always appending, never
4055 - When you update HiddenServiceDir via setconf, it was screwing up
4056 the order of reading the lines, making it fail.
4057 - Do not rewrite a cached directory back to the cache; otherwise we
4058 will think it is recent and not fetch a newer one on startup.
4059 - Workaround for webservers that lie about Content-Encoding: Tor
4060 now tries to autodetect compressed directories and compression
4061 itself. This lets us Proxypass dir fetches through apache.
4064 Changes in version 0.0.9.2 - 2005-01-04
4065 o Bugfixes on 0.0.9 (crashes and asserts):
4066 - Fix an assert on startup when the disk is full and you're logging
4068 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
4069 style address, then we'd crash.
4070 - Fix an assert trigger when the running-routers string we get from
4071 a dirserver is broken.
4072 - Make worker threads start and run on win32. Now win32 servers
4074 - Bandaid (not actually fix, but now it doesn't crash) an assert
4075 where the dns worker dies mysteriously and the main Tor process
4076 doesn't remember anything about the address it was resolving.
4078 o Bugfixes on 0.0.9 (Win32):
4079 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
4080 name out of the warning/assert messages.
4081 - Fix a superficial "unhandled error on read" bug on win32.
4082 - The win32 installer no longer requires a click-through for our
4083 license, since our Free Software license grants rights but does not
4085 - Win32: When connecting to a dirserver fails, try another one
4086 immediately. (This was already working for non-win32 Tors.)
4087 - Stop trying to parse $HOME on win32 when hunting for default
4089 - Make tor-resolve.c work on win32 by calling network_init().
4091 o Bugfixes on 0.0.9 (other):
4092 - Make 0.0.9.x build on Solaris again.
4093 - Due to a fencepost error, we were blowing away the \n when reporting
4094 confvalue items in the controller. So asking for multiple config
4095 values at once couldn't work.
4096 - When listing circuits that are pending on an opening OR connection,
4097 if we're an OR we were listing circuits that *end* at us as
4098 being pending on every listener, dns/cpu worker, etc. Stop that.
4099 - Dirservers were failing to create 'running-routers' or 'directory'
4100 strings if we had more than some threshold of routers. Fix them so
4101 they can handle any number of routers.
4102 - Fix a superficial "Duplicate mark for close" bug.
4103 - Stop checking for clock skew for OR connections, even for servers.
4104 - Fix a fencepost error that was chopping off the last letter of any
4105 nickname that is the maximum allowed nickname length.
4106 - Update URLs in log messages so they point to the new website.
4107 - Fix a potential problem in mangling server private keys while
4108 writing to disk (not triggered yet, as far as we know).
4109 - Include the licenses for other free software we include in Tor,
4110 now that we're shipping binary distributions more regularly.
4113 Changes in version 0.0.9.1 - 2004-12-15
4114 o Bugfixes on 0.0.9:
4115 - Make hibernation actually work.
4116 - Make HashedControlPassword config option work.
4117 - When we're reporting event circuit status to a controller,
4118 don't use the stream status code.
4121 Changes in version 0.0.9 - 2004-12-12
4123 - Clean up manpage and torrc.sample file.
4124 - Clean up severities and text of log warnings.
4126 - Make servers trigger an assert when they enter hibernation.
4129 Changes in version 0.0.9rc7 - 2004-12-08
4130 o Bugfixes on 0.0.9rc:
4131 - Fix a stack-trashing crash when an exit node begins hibernating.
4132 - Avoid looking at unallocated memory while considering which
4133 ports we need to build circuits to cover.
4134 - Stop a sigpipe: when an 'end' cell races with eof from the app,
4135 we shouldn't hold-open-until-flush if the eof arrived first.
4136 - Fix a bug with init_cookie_authentication() in the controller.
4137 - When recommending new-format log lines, if the upper bound is
4138 LOG_ERR, leave it implicit.
4140 o Bugfixes on 0.0.8.1:
4141 - Fix a whole slew of memory leaks.
4142 - Fix isspace() and friends so they still make Solaris happy
4143 but also so they don't trigger asserts on win32.
4144 - Fix parse_iso_time on platforms without strptime (eg win32).
4145 - win32: tolerate extra "readable" events better.
4146 - win32: when being multithreaded, leave parent fdarray open.
4147 - Make unit tests work on win32.
4150 Changes in version 0.0.9rc6 - 2004-12-06
4151 o Bugfixes on 0.0.9pre:
4152 - Clean up some more integer underflow opportunities (not exploitable
4154 - While hibernating, hup should not regrow our listeners.
4155 - Send an end to the streams we close when we hibernate, rather
4156 than just chopping them off.
4157 - React to eof immediately on non-open edge connections.
4159 o Bugfixes on 0.0.8.1:
4160 - Calculate timeout for waiting for a connected cell from the time
4161 we sent the begin cell, not from the time the stream started. If
4162 it took a long time to establish the circuit, we would time out
4163 right after sending the begin cell.
4164 - Fix router_compare_addr_to_addr_policy: it was not treating a port
4165 of * as always matching, so we were picking reject *:* nodes as
4166 exit nodes too. Oops.
4169 - New circuit building strategy: keep a list of ports that we've
4170 used in the past 6 hours, and always try to have 2 circuits open
4171 or on the way that will handle each such port. Seed us with port
4172 80 so web users won't complain that Tor is "slow to start up".
4173 - Make kill -USR1 dump more useful stats about circuits.
4174 - When warning about retrying or giving up, print the address, so
4175 the user knows which one it's talking about.
4176 - If you haven't used a clean circuit in an hour, throw it away,
4177 just to be on the safe side. (This means after 6 hours a totally
4178 unused Tor client will have no circuits open.)
4181 Changes in version 0.0.9rc5 - 2004-12-01
4182 o Bugfixes on 0.0.8.1:
4183 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
4184 - Let resolve conns retry/expire also, rather than sticking around
4186 - If we are using select, make sure we stay within FD_SETSIZE.
4188 o Bugfixes on 0.0.9pre:
4189 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
4190 but doesn't seem to be currently; thanks to Ilja van Sprundel for
4192 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
4193 instead. Impose minima and maxima for all *Period options; impose
4194 even tighter maxima for fetching if we are a caching dirserver.
4195 Clip rather than rejecting.
4196 - Fetch cached running-routers from servers that serve it (that is,
4197 authdirservers and servers running 0.0.9rc5-cvs or later.)
4200 - Accept *:706 (silc) in default exit policy.
4201 - Implement new versioning format for post 0.1.
4202 - Support "foo.nickname.exit" addresses, to let Alice request the
4203 address "foo" as viewed by exit node "nickname". Based on a patch
4205 - Make tor --version --version dump the cvs Id of every file.
4208 Changes in version 0.0.9rc4 - 2004-11-28
4209 o Bugfixes on 0.0.8.1:
4210 - Make windows sockets actually non-blocking (oops), and handle
4211 win32 socket errors better.
4213 o Bugfixes on 0.0.9rc1:
4214 - Actually catch the -USR2 signal.
4217 Changes in version 0.0.9rc3 - 2004-11-25
4218 o Bugfixes on 0.0.8.1:
4219 - Flush the log file descriptor after we print "Tor opening log file",
4220 so we don't see those messages days later.
4222 o Bugfixes on 0.0.9rc1:
4223 - Make tor-resolve work again.
4224 - Avoid infinite loop in tor-resolve if tor hangs up on it.
4225 - Fix an assert trigger for clients/servers handling resolves.
4228 Changes in version 0.0.9rc2 - 2004-11-24
4229 o Bugfixes on 0.0.9rc1:
4230 - I broke socks5 support while fixing the eof bug.
4231 - Allow unitless bandwidths and intervals; they default to bytes
4233 - New servers don't start out hibernating; they are active until
4234 they run out of bytes, so they have a better estimate of how
4235 long it takes, and so their operators can know they're working.
4238 Changes in version 0.0.9rc1 - 2004-11-23
4239 o Bugfixes on 0.0.8.1:
4240 - Finally fix a bug that's been plaguing us for a year:
4241 With high load, circuit package window was reaching 0. Whenever
4242 we got a circuit-level sendme, we were reading a lot on each
4243 socket, but only writing out a bit. So we would eventually reach
4244 eof. This would be noticed and acted on even when there were still
4245 bytes sitting in the inbuf.
4246 - When poll() is interrupted, we shouldn't believe the revents values.
4248 o Bugfixes on 0.0.9pre6:
4249 - Fix hibernate bug that caused pre6 to be broken.
4250 - Don't keep rephist info for routers that haven't had activity for
4251 24 hours. (This matters now that clients have keys, since we track
4253 - Never call close_temp_logs while validating log options.
4254 - Fix backslash-escaping on tor.sh.in and torctl.in.
4257 - Implement weekly/monthly/daily accounting: now you specify your
4258 hibernation properties by
4259 AccountingMax N bytes|KB|MB|GB|TB
4260 AccountingStart day|week|month [day] HH:MM
4261 Defaults to "month 1 0:00".
4262 - Let bandwidth and interval config options be specified as 5 bytes,
4263 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
4264 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
4265 get back to normal.)
4266 - If your requested entry or exit node has advertised bandwidth 0,
4268 - Be more greedy about filling up relay cells -- we try reading again
4269 once we've processed the stuff we read, in case enough has arrived
4270 to fill the last cell completely.
4271 - Apply NT service patch from Osamu Fujino. Still needs more work.
4274 Changes in version 0.0.9pre6 - 2004-11-15
4275 o Bugfixes on 0.0.8.1:
4276 - Fix assert failure on malformed socks4a requests.
4277 - Use identity comparison, not nickname comparison, to choose which
4278 half of circuit-ID-space each side gets to use. This is needed
4279 because sometimes we think of a router as a nickname, and sometimes
4280 as a hex ID, and we can't predict what the other side will do.
4281 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
4282 write() call will fail and we handle it there.
4283 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
4284 and smartlist_len, which are two major profiling offenders.
4286 o Bugfixes on 0.0.9pre5:
4287 - Fix a bug in read_all that was corrupting config files on windows.
4288 - When we're raising the max number of open file descriptors to
4289 'unlimited', don't log that we just raised it to '-1'.
4290 - Include event code with events, as required by control-spec.txt.
4291 - Don't give a fingerprint when clients do --list-fingerprint:
4292 it's misleading, because it will never be the same again.
4293 - Stop using strlcpy in tor_strndup, since it was slowing us
4295 - Remove warn on startup about missing cached-directory file.
4296 - Make kill -USR1 work again.
4297 - Hibernate if we start tor during the "wait for wakeup-time" phase
4298 of an accounting interval. Log our hibernation plans better.
4299 - Authoritative dirservers now also cache their directory, so they
4300 have it on start-up.
4303 - Fetch running-routers; cache running-routers; compress
4304 running-routers; serve compressed running-routers.z
4305 - Add NSI installer script contributed by J Doe.
4306 - Commit VC6 and VC7 workspace/project files.
4307 - Commit a tor.spec for making RPM files, with help from jbash.
4308 - Add contrib/torctl.in contributed by Glenn Fink.
4309 - Implement the control-spec's SAVECONF command, to write your
4310 configuration to torrc.
4311 - Get cookie authentication for the controller closer to working.
4312 - Include control-spec.txt in the tarball.
4313 - When set_conf changes our server descriptor, upload a new copy.
4314 But don't upload it too often if there are frequent changes.
4315 - Document authentication config in man page, and document signals
4317 - Clean up confusing parts of man page and torrc.sample.
4318 - Make expand_filename handle ~ and ~username.
4319 - Use autoconf to enable largefile support where necessary. Use
4320 ftello where available, since ftell can fail at 2GB.
4321 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
4322 log more informatively.
4323 - Give a slightly more useful output for "tor -h".
4324 - Refuse application socks connections to port 0.
4325 - Check clock skew for verified servers, but allow unverified
4326 servers and clients to have any clock skew.
4327 - Break DirFetchPostPeriod into:
4328 - DirFetchPeriod for fetching full directory,
4329 - StatusFetchPeriod for fetching running-routers,
4330 - DirPostPeriod for posting server descriptor,
4331 - RendPostPeriod for posting hidden service descriptors.
4332 - Make sure the hidden service descriptors are at a random offset
4333 from each other, to hinder linkability.
4336 Changes in version 0.0.9pre5 - 2004-11-09
4337 o Bugfixes on 0.0.9pre4:
4338 - Fix a seg fault in unit tests (doesn't affect main program).
4339 - Fix an assert bug where a hidden service provider would fail if
4340 the first hop of his rendezvous circuit was down.
4341 - Hidden service operators now correctly handle version 1 style
4342 INTRODUCE1 cells (nobody generates them still, so not a critical
4344 - If do_hup fails, actually notice.
4345 - Handle more errnos from accept() without closing the listener.
4346 Some OpenBSD machines were closing their listeners because
4347 they ran out of file descriptors.
4348 - Send resolve cells to exit routers that are running a new
4349 enough version of the resolve code to work right.
4350 - Better handling of winsock includes on non-MSV win32 compilers.
4351 - Some people had wrapped their tor client/server in a script
4352 that would restart it whenever it died. This did not play well
4353 with our "shut down if your version is obsolete" code. Now people
4354 don't fetch a new directory if their local cached version is
4356 - Make our autogen.sh work on ksh as well as bash.
4359 - Hibernation: New config option "AccountingMaxKB" lets you
4360 set how many KBytes per month you want to allow your server to
4361 consume. Rather than spreading those bytes out evenly over the
4362 month, we instead hibernate for some of the month and pop up
4363 at a deterministic time, work until the bytes are consumed, then
4364 hibernate again. Config option "MonthlyAccountingStart" lets you
4365 specify which day of the month your billing cycle starts on.
4366 - Control interface: a separate program can now talk to your
4367 client/server over a socket, and get/set config options, receive
4368 notifications of circuits and streams starting/finishing/dying,
4369 bandwidth used, etc. The next step is to get some GUIs working.
4370 Let us know if you want to help out. See doc/control-spec.txt .
4371 - Ship a contrib/tor-control.py as an example script to interact
4372 with the control port.
4373 - "tor --hash-password zzyxz" will output a salted password for
4374 use in authenticating to the control interface.
4375 - New log format in config:
4376 "Log minsev[-maxsev] stdout|stderr|syslog" or
4377 "Log minsev[-maxsev] file /var/foo"
4380 - DirPolicy config option, to let people reject incoming addresses
4381 from their dirserver.
4382 - "tor --list-fingerprint" will list your identity key fingerprint
4384 - Add "pass" target for RedirectExit, to make it easier to break
4385 out of a sequence of RedirectExit rules.
4386 - Clients now generate a TLS cert too, in preparation for having
4387 them act more like real nodes.
4388 - Ship src/win32/ in the tarball, so people can use it to build.
4389 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
4391 - New "router-status" line in directory, to better bind each verified
4392 nickname to its identity key.
4393 - Deprecate unofficial config option abbreviations, and abbreviations
4394 not on the command line.
4395 - Add a pure-C tor-resolve implementation.
4396 - Use getrlimit and friends to ensure we can reach MaxConn (currently
4397 1024) file descriptors.
4399 o Code security improvements, inspired by Ilja:
4400 - Replace sprintf with snprintf. (I think they were all safe, but
4402 - Replace strcpy/strncpy with strlcpy in more places.
4403 - Avoid strcat; use snprintf or strlcat instead.
4404 - snprintf wrapper with consistent (though not C99) overflow behavior.
4407 Changes in version 0.0.9pre4 - 2004-10-17
4408 o Bugfixes on 0.0.9pre3:
4409 - If the server doesn't specify an exit policy, use the real default
4410 exit policy, not reject *:*.
4411 - Ignore fascistfirewall when uploading/downloading hidden service
4412 descriptors, since we go through Tor for those; and when using
4413 an HttpProxy, since we assume it can reach them all.
4414 - When looking for an authoritative dirserver, use only the ones
4415 configured at boot. Don't bother looking in the directory.
4416 - The rest of the fix for get_default_conf_file() on older win32.
4417 - Make 'Routerfile' config option obsolete.
4420 - New 'MyFamily nick1,...' config option for a server to
4421 specify other servers that shouldn't be used in the same circuit
4422 with it. Only believed if nick1 also specifies us.
4423 - New 'NodeFamily nick1,nick2,...' config option for a client to
4424 specify nodes that it doesn't want to use in the same circuit.
4425 - New 'Redirectexit pattern address:port' config option for a
4426 server to redirect exit connections, e.g. to a local squid.
4429 Changes in version 0.0.9pre3 - 2004-10-13
4430 o Bugfixes on 0.0.8.1:
4431 - Better torrc example lines for dirbindaddress and orbindaddress.
4432 - Improved bounds checking on parsed ints (e.g. config options and
4433 the ones we find in directories.)
4434 - Better handling of size_t vs int, so we're more robust on 64
4436 - Fix the rest of the bug where a newly started OR would appear
4437 as unverified even after we've added his fingerprint and hupped
4439 - Fix a bug from 0.0.7: when read() failed on a stream, we would
4440 close it without sending back an end. So 'connection refused'
4441 would simply be ignored and the user would get no response.
4443 o Bugfixes on 0.0.9pre2:
4444 - Serving the cached-on-disk directory to people is bad. We now
4445 provide no directory until we've fetched a fresh one.
4446 - Workaround for bug on windows where cached-directories get crlf
4448 - Make get_default_conf_file() work on older windows too.
4449 - If we write a *:* exit policy line in the descriptor, don't write
4450 any more exit policy lines.
4453 - Use only 0.0.9pre1 and later servers for resolve cells.
4454 - Make the dirservers file obsolete.
4455 - Include a dir-signing-key token in directories to tell the
4456 parsing entity which key is being used to sign.
4457 - Remove the built-in bulky default dirservers string.
4458 - New config option "Dirserver %s:%d [fingerprint]", which can be
4459 repeated as many times as needed. If no dirservers specified,
4460 default to moria1,moria2,tor26.
4461 - Make moria2 advertise a dirport of 80, so people behind firewalls
4462 will be able to get a directory.
4463 - Http proxy support
4464 - Dirservers translate requests for http://%s:%d/x to /x
4465 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
4466 be routed through this host.
4467 - Clients ask for /tor/x rather than /x for new enough dirservers.
4468 This way we can one day coexist peacefully with apache.
4469 - Clients specify a "Host: %s%d" http header, to be compatible
4470 with more proxies, and so running squid on an exit node can work.
4473 Changes in version 0.0.8.1 - 2004-10-13
4475 - Fix a seg fault that can be triggered remotely for Tor
4476 clients/servers with an open dirport.
4477 - Fix a rare assert trigger, where routerinfos for entries in
4478 our cpath would expire while we're building the path.
4479 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4480 - Fix a rare seg fault for people running hidden services on
4481 intermittent connections.
4482 - Fix a bug in parsing opt keywords with objects.
4483 - Fix a stale pointer assert bug when a stream detaches and
4485 - Fix a string format vulnerability (probably not exploitable)
4486 in reporting stats locally.
4487 - Fix an assert trigger: sometimes launching circuits can fail
4488 immediately, e.g. because too many circuits have failed recently.
4489 - Fix a compile warning on 64 bit platforms.
4492 Changes in version 0.0.9pre2 - 2004-10-03
4494 - Make fetching a cached directory work for 64-bit platforms too.
4495 - Make zlib.h a required header, not an optional header.
4498 Changes in version 0.0.9pre1 - 2004-10-01
4500 - Stop using separate defaults for no-config-file and
4501 empty-config-file. Now you have to explicitly turn off SocksPort,
4502 if you don't want it open.
4503 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4504 - Improve man page to mention more of the 0.0.8 features.
4505 - Fix a rare seg fault for people running hidden services on
4506 intermittent connections.
4507 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
4509 - Fix more dns related bugs: send back resolve_failed and end cells
4510 more reliably when the resolve fails, rather than closing the
4511 circuit and then trying to send the cell. Also attach dummy resolve
4512 connections to a circuit *before* calling dns_resolve(), to fix
4513 a bug where cached answers would never be sent in RESOLVED cells.
4514 - When we run out of disk space, or other log writing error, don't
4515 crash. Just stop logging to that log and continue.
4516 - We were starting to daemonize before we opened our logs, so if
4517 there were any problems opening logs, we would complain to stderr,
4518 which wouldn't work, and then mysteriously exit.
4519 - Fix a rare bug where sometimes a verified OR would connect to us
4520 before he'd uploaded his descriptor, which would cause us to
4521 assign conn->nickname as though he's unverified. Now we look through
4522 the fingerprint list to see if he's there.
4523 - Fix a rare assert trigger, where routerinfos for entries in
4524 our cpath would expire while we're building the path.
4527 - Clients can ask dirservers for /dir.z to get a compressed version
4528 of the directory. Only works for servers running 0.0.9, of course.
4529 - Make clients cache directories and use them to seed their router
4530 lists at startup. This means clients have a datadir again.
4531 - Configuration infrastructure support for warning on obsolete
4533 - Respond to content-encoding headers by trying to uncompress as
4535 - Reply with a deflated directory when a client asks for "dir.z".
4536 We could use allow-encodings instead, but allow-encodings isn't
4537 specified in HTTP 1.0.
4538 - Raise the max dns workers from 50 to 100.
4539 - Discourage people from setting their dirfetchpostperiod more often
4540 than once per minute.
4541 - Protect dirservers from overzealous descriptor uploading -- wait
4542 10 seconds after directory gets dirty, before regenerating.
4545 Changes in version 0.0.8 - 2004-08-25
4546 o Port it to SunOS 5.9 / Athena
4549 Changes in version 0.0.8rc2 - 2004-08-20
4550 o Make it compile on cygwin again.
4551 o When picking unverified routers, skip those with low uptime and/or
4552 low bandwidth, depending on what properties you care about.
4555 Changes in version 0.0.8rc1 - 2004-08-18
4556 o Changes from 0.0.7.3:
4558 - Fix assert triggers: if the other side returns an address 0.0.0.0,
4559 don't put it into the client dns cache.
4560 - If a begin failed due to exit policy, but we believe the IP address
4561 should have been allowed, switch that router to exitpolicy reject *:*
4562 until we get our next directory.
4564 - Clients choose nodes proportional to advertised bandwidth.
4565 - Avoid using nodes with low uptime as introduction points.
4566 - Handle servers with dynamic IP addresses: don't replace
4567 options->Address with the resolved one at startup, and
4568 detect our address right before we make a routerinfo each time.
4569 - 'FascistFirewall' option to pick dirservers and ORs on specific
4570 ports; plus 'FirewallPorts' config option to tell FascistFirewall
4571 which ports are open. (Defaults to 80,443)
4572 - Be more aggressive about trying to make circuits when the network
4573 has changed (e.g. when you unsuspend your laptop).
4574 - Check for time skew on http headers; report date in response to
4576 - If the entrynode config line has only one node, don't pick it as
4578 - Add strict{entry|exit}nodes config options. If set to 1, then
4579 we refuse to build circuits that don't include the specified entry
4581 - OutboundBindAddress config option, to bind to a specific
4582 IP address for outgoing connect()s.
4583 - End truncated log entries (e.g. directories) with "[truncated]".
4585 o Patches to 0.0.8preX:
4587 - Patches to compile and run on win32 again (maybe)?
4588 - Fix crash when looking for ~/.torrc with no $HOME set.
4589 - Fix a race bug in the unit tests.
4590 - Handle verified/unverified name collisions better when new
4591 routerinfo's arrive in a directory.
4592 - Sometimes routers were getting entered into the stats before
4593 we'd assigned their identity_digest. Oops.
4594 - Only pick and establish intro points after we've gotten a
4597 - AllowUnverifiedNodes config option to let circuits choose no-name
4598 routers in entry,middle,exit,introduction,rendezvous positions.
4599 Allow middle and rendezvous positions by default.
4600 - Add a man page for tor-resolve.
4603 Changes in version 0.0.7.3 - 2004-08-12
4604 o Stop dnsworkers from triggering an assert failure when you
4605 ask them to resolve the host "".
4608 Changes in version 0.0.8pre3 - 2004-08-09
4609 o Changes from 0.0.7.2:
4610 - Allow multiple ORs with same nickname in routerlist -- now when
4611 people give us one identity key for a nickname, then later
4612 another, we don't constantly complain until the first expires.
4613 - Remember used bandwidth (both in and out), and publish 15-minute
4614 snapshots for the past day into our descriptor.
4615 - You can now fetch $DIRURL/running-routers to get just the
4616 running-routers line, not the whole descriptor list. (But
4617 clients don't use this yet.)
4618 - When people mistakenly use Tor as an http proxy, point them
4619 at the tor-doc.html rather than the INSTALL.
4620 - Remove our mostly unused -- and broken -- hex_encode()
4621 function. Use base16_encode() instead. (Thanks to Timo Lindfors
4622 for pointing out this bug.)
4623 - Rotate onion keys every 12 hours, not every 2 hours, so we have
4624 fewer problems with people using the wrong key.
4625 - Change the default exit policy to reject the default edonkey,
4626 kazaa, gnutella ports.
4627 - Add replace_file() to util.[ch] to handle win32's rename().
4629 o Changes from 0.0.8preX:
4630 - Fix two bugs in saving onion keys to disk when rotating, so
4631 hopefully we'll get fewer people using old onion keys.
4632 - Fix an assert error that was making SocksPolicy not work.
4633 - Be willing to expire routers that have an open dirport -- it's
4634 just the authoritative dirservers we want to not forget.
4635 - Reject tor-resolve requests for .onion addresses early, so we
4636 don't build a whole rendezvous circuit and then fail.
4637 - When you're warning a server that he's unverified, don't cry
4639 - Fix a race condition: don't try to extend onto a connection
4640 that's still handshaking.
4641 - For servers in clique mode, require the conn to be open before
4642 you'll choose it for your path.
4643 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
4644 end relay cell, etc.
4645 - Measure bandwidth capacity over the last 24 hours, not just 12
4646 - Bugfix: authoritative dirservers were making and signing a new
4647 directory for each client, rather than reusing the cached one.
4650 Changes in version 0.0.8pre2 - 2004-08-04
4651 o Changes from 0.0.7.2:
4653 - Check directory signature _before_ you decide whether you're
4654 you're running an obsolete version and should exit.
4655 - Check directory signature _before_ you parse the running-routers
4656 list to decide who's running or verified.
4657 - Bugfixes and features:
4658 - Check return value of fclose while writing to disk, so we don't
4659 end up with broken files when servers run out of disk space.
4660 - Log a warning if the user uses an unsafe socks variant, so people
4661 are more likely to learn about privoxy or socat.
4662 - Dirservers now include RFC1123-style dates in the HTTP headers,
4663 which one day we will use to better detect clock skew.
4665 o Changes from 0.0.8pre1:
4666 - Make it compile without warnings again on win32.
4667 - Log a warning if you're running an unverified server, to let you
4668 know you might want to get it verified.
4669 - Only pick a default nickname if you plan to be a server.
4672 Changes in version 0.0.8pre1 - 2004-07-23
4674 - Made our unit tests compile again on OpenBSD 3.5, and tor
4675 itself compile again on OpenBSD on a sparc64.
4676 - We were neglecting milliseconds when logging on win32, so
4677 everything appeared to happen at the beginning of each second.
4680 - 'Extend' relay cell payloads now include the digest of the
4681 intended next hop's identity key. Now we can verify that we're
4682 extending to the right router, and also extend to routers we
4683 hadn't heard of before.
4686 - Tor nodes can now act as relays (with an advertised ORPort)
4687 without being manually verified by the dirserver operators.
4688 - Uploaded descriptors of unverified routers are now accepted
4689 by the dirservers, and included in the directory.
4690 - Verified routers are listed by nickname in the running-routers
4691 list; unverified routers are listed as "$<fingerprint>".
4692 - We now use hash-of-identity-key in most places rather than
4693 nickname or addr:port, for improved security/flexibility.
4694 - To avoid Sybil attacks, paths still use only verified servers.
4695 But now we have a chance to play around with hybrid approaches.
4696 - Nodes track bandwidth usage to estimate capacity (not used yet).
4697 - ClientOnly option for nodes that never want to become servers.
4698 - Directory caching.
4699 - "AuthoritativeDir 1" option for the official dirservers.
4700 - Now other nodes (clients and servers) will cache the latest
4701 directory they've pulled down.
4702 - They can enable their DirPort to serve it to others.
4703 - Clients will pull down a directory from any node with an open
4704 DirPort, and check the signature/timestamp correctly.
4705 - Authoritative dirservers now fetch directories from other
4706 authdirservers, to stay better synced.
4707 - Running-routers list tells who's down also, along with noting
4708 if they're verified (listed by nickname) or unverified (listed
4710 - Allow dirservers to serve running-router list separately.
4711 This isn't used yet.
4712 - ORs connect-on-demand to other ORs
4713 - If you get an extend cell to an OR you're not connected to,
4714 connect, handshake, and forward the create cell.
4715 - The authoritative dirservers stay connected to everybody,
4716 and everybody stays connected to 0.0.7 servers, but otherwise
4717 clients/servers expire unused connections after 5 minutes.
4718 - When servers get a sigint, they delay 30 seconds (refusing new
4719 connections) then exit. A second sigint causes immediate exit.
4720 - File and name management:
4721 - Look for .torrc if no CONFDIR "torrc" is found.
4722 - If no datadir is defined, then choose, make, and secure ~/.tor
4724 - If torrc not found, exitpolicy reject *:*.
4725 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
4726 - If no nickname is defined, derive default from hostname.
4727 - Rename secret key files, e.g. identity.key -> secret_id_key,
4728 to discourage people from mailing their identity key to tor-ops.
4729 - Refuse to build a circuit before the directory has arrived --
4730 it won't work anyway, since you won't know the right onion keys
4732 - Try other dirservers immediately if the one you try is down. This
4733 should tolerate down dirservers better now.
4734 - Parse tor version numbers so we can do an is-newer-than check
4735 rather than an is-in-the-list check.
4736 - New socks command 'resolve', to let us shim gethostbyname()
4738 - A 'tor_resolve' script to access the socks resolve functionality.
4739 - A new socks-extensions.txt doc file to describe our
4740 interpretation and extensions to the socks protocols.
4741 - Add a ContactInfo option, which gets published in descriptor.
4742 - Publish OR uptime in descriptor (and thus in directory) too.
4743 - Write tor version at the top of each log file
4744 - New docs in the tarball:
4746 - Document that you should proxy your SSL traffic too.
4749 Changes in version 0.0.7.2 - 2004-07-07
4750 o A better fix for the 0.0.0.0 problem, that will hopefully
4751 eliminate the remaining related assertion failures.
4754 Changes in version 0.0.7.1 - 2004-07-04
4755 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
4756 since internally we use 0.0.0.0 to signify "not yet resolved".
4759 Changes in version 0.0.7 - 2004-06-07
4760 o Updated the man page to reflect the new features.
4763 Changes in version 0.0.7rc2 - 2004-06-06
4764 o Changes from 0.0.7rc1:
4765 - Make it build on Win32 again.
4766 o Changes from 0.0.6.2:
4767 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
4771 Changes in version 0.0.7rc1 - 2004-06-02
4773 - On sighup, we were adding another log without removing the first
4774 one. So log messages would get duplicated n times for n sighups.
4775 - Several cases of using a connection after we'd freed it. The
4776 problem was that connections that are pending resolve are in both
4777 the pending_resolve tree, and also the circuit's resolving_streams
4778 list. When you want to remove one, you must remove it from both.
4779 - Fix a double-mark-for-close where an end cell arrived for a
4780 resolving stream, and then the resolve failed.
4781 - Check directory signatures based on name of signer, not on whom
4782 we got the directory from. This will let us cache directories more
4785 - Crank up some of our constants to handle more users.
4788 Changes in version 0.0.7pre1 - 2004-06-02
4789 o Fixes for crashes and other obnoxious bugs:
4790 - Fix an epipe bug: sometimes when directory connections failed
4791 to connect, we would give them a chance to flush before closing
4793 - When we detached from a circuit because of resolvefailed, we
4794 would immediately try the same circuit twice more, and then
4795 give up on the resolve thinking we'd tried three different
4797 - Limit the number of intro circuits we'll attempt to build for a
4798 hidden service per 15-minute period.
4799 - Check recommended-software string *early*, before actually parsing
4800 the directory. Thus we can detect an obsolete version and exit,
4801 even if the new directory format doesn't parse.
4802 o Fixes for security bugs:
4803 - Remember which nodes are dirservers when you startup, and if a
4804 random OR enables his dirport, don't automatically assume he's
4805 a trusted dirserver.
4807 - Directory connections were asking the wrong poll socket to
4808 start writing, and not asking themselves to start writing.
4809 - When we detached from a circuit because we sent a begin but
4810 didn't get a connected, we would use it again the first time;
4811 but after that we would correctly switch to a different one.
4812 - Stop warning when the first onion decrypt attempt fails; they
4813 will sometimes legitimately fail now that we rotate keys.
4814 - Override unaligned-access-ok check when $host_cpu is ia64 or
4815 arm. Apparently they allow it but the kernel whines.
4816 - Dirservers try to reconnect periodically too, in case connections
4818 - Fix some memory leaks in directory servers.
4819 - Allow backslash in Win32 filenames.
4820 - Made Tor build complain-free on FreeBSD, hopefully without
4821 breaking other BSD builds. We'll see.
4823 - Doxygen markup on all functions and global variables.
4824 - Make directory functions update routerlist, not replace it. So
4825 now directory disagreements are not so critical a problem.
4826 - Remove the upper limit on number of descriptors in a dirserver's
4827 directory (not that we were anywhere close).
4828 - Allow multiple logfiles at different severity ranges.
4829 - Allow *BindAddress to specify ":port" rather than setting *Port
4830 separately. Allow multiple instances of each BindAddress config
4831 option, so you can bind to multiple interfaces if you want.
4832 - Allow multiple exit policy lines, which are processed in order.
4833 Now we don't need that huge line with all the commas in it.
4834 - Enable accept/reject policies on SOCKS connections, so you can bind
4835 to 0.0.0.0 but still control who can use your OP.
4838 Changes in version 0.0.6.2 - 2004-05-16
4839 o Our integrity-checking digest was checking only the most recent cell,
4840 not the previous cells like we'd thought.
4841 Thanks to Stefan Mark for finding the flaw!
4844 Changes in version 0.0.6.1 - 2004-05-06
4845 o Fix two bugs in our AES counter-mode implementation (this affected
4846 onion-level stream encryption, but not TLS-level). It turns
4847 out we were doing something much more akin to a 16-character
4848 polyalphabetic cipher. Oops.
4849 Thanks to Stefan Mark for finding the flaw!
4850 o Retire moria3 as a directory server, and add tor26 as a directory
4854 Changes in version 0.0.6 - 2004-05-02
4858 Changes in version 0.0.6rc4 - 2004-05-01
4859 o Update the built-in dirservers list to use the new directory format
4860 o Fix a rare seg fault: if a node offering a hidden service attempts
4861 to build a circuit to Alice's rendezvous point and fails before it
4862 reaches the last hop, it retries with a different circuit, but
4864 o Handle windows socket errors correctly.
4867 Changes in version 0.0.6rc3 - 2004-04-28
4868 o Don't expire non-general excess circuits (if we had enough
4869 circuits open, we were expiring rendezvous circuits -- even
4870 when they had a stream attached. oops.)
4871 o Fetch randomness from /dev/urandom better (not via fopen/fread)
4872 o Better debugging for tls errors
4873 o Some versions of openssl have an SSL_pending function that erroneously
4874 returns bytes when there is a non-application record pending.
4875 o Set Content-Type on the directory and hidserv descriptor.
4876 o Remove IVs from cipher code, since AES-ctr has none.
4877 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
4878 o We were using an array of length zero in a few places.
4879 o win32's gethostbyname can't resolve an IP to an IP.
4880 o win32's close can't close a socket.
4883 Changes in version 0.0.6rc2 - 2004-04-26
4884 o Fix a bug where we were closing tls connections intermittently.
4885 It turns out openssl keeps its errors around -- so if an error
4886 happens, and you don't ask about it, and then another openssl
4887 operation happens and succeeds, and you ask if there was an error,
4888 it tells you about the first error. Fun fun.
4889 o Fix a bug that's been lurking since 27 may 03 (!)
4890 When passing back a destroy cell, we would use the wrong circ id.
4891 'Mostly harmless', but still worth fixing.
4892 o Since we don't support truncateds much, don't bother sending them;
4893 just close the circ.
4894 o check for <machine/limits.h> so we build on NetBSD again (I hope).
4895 o don't crash if a conn that sent a begin has suddenly lost its circuit
4896 (this was quite rare).
4899 Changes in version 0.0.6rc1 - 2004-04-25
4900 o We now rotate link (tls context) keys and onion keys.
4901 o CREATE cells now include oaep padding, so you can tell
4902 if you decrypted them correctly.
4903 o Add bandwidthburst to server descriptor.
4904 o Directories now say which dirserver signed them.
4905 o Use a tor_assert macro that logs failed assertions too.
4908 Changes in version 0.0.6pre5 - 2004-04-18
4909 o changes from 0.0.6pre4:
4910 - make tor build on broken freebsd 5.2 installs
4911 - fix a failed assert when you try an intro point, get a nack, and try
4912 a second one and it works.
4913 - when alice uses a port that the hidden service doesn't accept,
4914 it now sends back an end cell (denied by exit policy). otherwise
4915 alice would just have to wait to time out.
4916 - fix another rare bug: when we had tried all the intro
4917 points for a hidden service, we fetched the descriptor
4918 again, but we left our introcirc thinking it had already
4919 sent an intro, so it kept waiting for a response...
4920 - bugfix: when you sleep your hidden-service laptop, as soon
4921 as it wakes up it tries to upload a service descriptor, but
4922 socketpair fails for some reason (localhost not up yet?).
4923 now we simply give up on that upload, and we'll try again later.
4924 i'd still like to find the bug though.
4925 - if an intro circ waiting for an ack dies before getting one, then
4927 - we were reusing stale service descriptors and refetching usable
4931 Changes in version 0.0.6pre4 - 2004-04-14
4932 o changes from 0.0.6pre3:
4933 - when bob fails to connect to the rendezvous point, and his
4934 circ didn't fail because of the rendezvous point itself, then
4935 he retries a couple of times
4936 - we expire introduction and rendezvous circs more thoroughly
4937 (sometimes they were hanging around forever)
4938 - we expire unattached rendezvous streams that have been around
4939 too long (they were sticking around forever).
4940 - fix a measly fencepost error that was crashing everybody with
4944 Changes in version 0.0.6pre3 - 2004-04-14
4945 o changes from 0.0.6pre2:
4946 - make hup work again
4947 - fix some memory leaks for dirservers
4948 - allow more skew in rendezvous descriptor timestamps, to help
4949 handle people like blanu who don't know what time it is
4950 - normal circs are 3 hops, but some rend/intro circs are 4, if
4951 the initiator doesn't get to choose the last hop
4952 - send acks for introductions, so alice can know whether to try
4954 - bob publishes intro points more correctly
4955 o changes from 0.0.5:
4956 - fix an assert trigger that's been plaguing us since the days
4957 of 0.0.2prexx (thanks weasel!)
4958 - retry stream correctly when we fail to connect because of
4959 exit-policy-reject (should try another) or can't-resolve-address
4960 (also should try another, because dns on random internet servers
4962 - when we hup a dirserver and we've *removed* a server from the
4963 approved-routers list, now we remove that server from the
4964 in-memory directories too
4967 Changes in version 0.0.6pre2 - 2004-04-08
4968 o We fixed our base32 implementation. Now it works on all architectures.
4971 Changes in version 0.0.6pre1 - 2004-04-08
4973 - Hidden services and rendezvous points are implemented. Go to
4974 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
4975 hidden services. (This only works via a socks4a proxy such as
4976 Privoxy, and currently it's quite slow.)
4979 Changes in version 0.0.5 - 2004-03-30
4983 Changes in version 0.0.5rc3 - 2004-03-29
4984 o Install torrc as torrc.sample -- we no longer clobber your
4986 o Re-enable recommendedversion checking (we broke it in rc2, oops)
4987 o Add in a 'notice' log level for things the operator should hear
4988 but that aren't warnings
4991 Changes in version 0.0.5rc2 - 2004-03-29
4992 o Hold socks connection open until reply is flushed (if possible)
4993 o Make exit nodes resolve IPs to IPs immediately, rather than asking
4994 the dns farm to do it.
4995 o Fix c99 aliasing warnings in rephist.c
4996 o Don't include server descriptors that are older than 24 hours in the
4998 o Give socks 'reject' replies their whole 15s to attempt to flush,
4999 rather than seeing the 60s timeout and assuming the flush had failed.
5000 o Clean automake droppings from the cvs repository
5003 Changes in version 0.0.5rc1 - 2004-03-28
5004 o Fix mangled-state bug in directory fetching (was causing sigpipes).
5005 o Only build circuits after we've fetched the directory: clients were
5006 using only the directory servers before they'd fetched a directory.
5007 This also means longer startup time; so it goes.
5008 o Fix an assert trigger where an OP would fail to handshake, and we'd
5009 expect it to have a nickname.
5010 o Work around a tsocks bug: do a socks reject when AP connection dies
5011 early, else tsocks goes into an infinite loop.
5014 Changes in version 0.0.4 - 2004-03-26
5015 o When connecting to a dirserver or OR and the network is down,
5019 Changes in version 0.0.3 - 2004-03-26
5020 o Warn and fail if server chose a nickname with illegal characters
5021 o Port to Solaris and Sparc:
5022 - include missing header fcntl.h
5023 - have autoconf find -lsocket -lnsl automatically
5024 - deal with hardware word alignment
5025 - make uname() work (solaris has a different return convention)
5026 - switch from using signal() to sigaction()
5027 o Preliminary work on reputation system:
5028 - Keep statistics on success/fail of connect attempts; they're published
5029 by kill -USR1 currently.
5030 - Add a RunTesting option to try to learn link state by creating test
5031 circuits, even when SocksPort is off.
5032 - Remove unused open circuits when there are too many.
5035 Changes in version 0.0.2 - 2004-03-19
5036 - Include strlcpy and strlcat for safer string ops
5037 - define INADDR_NONE so we compile (but still not run) on solaris
5040 Changes in version 0.0.2pre27 - 2004-03-14
5042 - Allow internal tor networks (we were rejecting internal IPs,
5043 now we allow them if they're set explicitly).
5044 - And fix a few endian issues.
5047 Changes in version 0.0.2pre26 - 2004-03-14
5049 - If a stream times out after 15s without a connected cell, don't
5050 try that circuit again: try a new one.
5051 - Retry streams at most 4 times. Then give up.
5052 - When a dirserver gets a descriptor from an unknown router, it
5053 logs its fingerprint (so the dirserver operator can choose to
5054 accept it even without mail from the server operator).
5055 - Inform unapproved servers when we reject their descriptors.
5056 - Make tor build on Windows again. It works as a client, who knows
5058 - Clearer instructions in the torrc for how to set up a server.
5059 - Be more efficient about reading fd's when our global token bucket
5060 (used for rate limiting) becomes empty.
5062 - Stop asserting that computers always go forward in time. It's
5064 - When we sent a cell (e.g. destroy) and then marked an OR connection
5065 expired, we might close it before finishing a flush if the other
5066 side isn't reading right then.
5067 - Don't allow dirservers to start if they haven't defined
5069 - We were caching transient dns failures. Oops.
5070 - Prevent servers from publishing an internal IP as their address.
5071 - Address a strcat vulnerability in circuit.c
5074 Changes in version 0.0.2pre25 - 2004-03-04
5076 - Put the OR's IP in its router descriptor, not its fqdn. That way
5077 we'll stop being stalled by gethostbyname for nodes with flaky dns,
5080 - If the user typed in an address that didn't resolve, the server
5084 Changes in version 0.0.2pre24 - 2004-03-03
5086 - Fix an assertion failure in dns.c, where we were trying to dequeue
5087 a pending dns resolve even if it wasn't pending
5088 - Fix a spurious socks5 warning about still trying to write after the
5089 connection is finished.
5090 - Hold certain marked_for_close connections open until they're finished
5091 flushing, rather than losing bytes by closing them too early.
5092 - Correctly report the reason for ending a stream
5093 - Remove some duplicate calls to connection_mark_for_close
5094 - Put switch_id and start_daemon earlier in the boot sequence, so it
5095 will actually try to chdir() to options.DataDirectory
5096 - Make 'make test' exit(1) if a test fails; fix some unit tests
5097 - Make tor fail when you use a config option it doesn't know about,
5098 rather than warn and continue.
5099 - Make --version work
5100 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
5103 Changes in version 0.0.2pre23 - 2004-02-29
5105 - Print a statement when the first circ is finished, so the user
5107 - If a relay cell is unrecognized at the end of the circuit,
5108 send back a destroy. (So attacks to mutate cells are more
5110 - New config option 'excludenodes' to avoid certain nodes for circuits.
5111 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
5112 so you can collect coredumps there.
5114 - Fix a bug in tls flushing where sometimes data got wedged and
5115 didn't flush until more data got sent. Hopefully this bug was
5116 a big factor in the random delays we were seeing.
5117 - Make 'connected' cells include the resolved IP, so the client
5118 dns cache actually gets populated.
5119 - Disallow changing from ORPort=0 to ORPort>0 on hup.
5120 - When we time-out on a stream and detach from the circuit, send an
5121 end cell down it first.
5122 - Only warn about an unknown router (in exitnodes, entrynodes,
5123 excludenodes) after we've fetched a directory.
5126 Changes in version 0.0.2pre22 - 2004-02-26
5128 - Servers publish less revealing uname information in descriptors.
5129 - More memory tracking and assertions, to crash more usefully when
5131 - If the default torrc isn't there, just use some default defaults.
5132 Plus provide an internal dirservers file if they don't have one.
5133 - When the user tries to use Tor as an http proxy, give them an http
5134 501 failure explaining that we're a socks proxy.
5135 - Dump a new router.desc on hup, to help confused people who change
5136 their exit policies and then wonder why router.desc doesn't reflect
5138 - Clean up the generic tor.sh init script that we ship with.
5140 - If the exit stream is pending on the resolve, and a destroy arrives,
5141 then the stream wasn't getting removed from the pending list. I
5142 think this was the one causing recent server crashes.
5143 - Use a more robust poll on OSX 10.3, since their poll is flaky.
5144 - When it couldn't resolve any dirservers, it was useless from then on.
5145 Now it reloads the RouterFile (or default dirservers) if it has no
5147 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
5148 many users don't even *have* a /usr/local/sbin/.
5151 Changes in version 0.0.2pre21 - 2004-02-18
5153 - There's a ChangeLog file that actually reflects the changelog.
5154 - There's a 'torify' wrapper script, with an accompanying
5155 tor-tsocks.conf, that simplifies the process of using tsocks for
5156 tor. It even has a man page.
5157 - The tor binary gets installed to sbin rather than bin now.
5158 - Retry streams where the connected cell hasn't arrived in 15 seconds
5159 - Clean up exit policy handling -- get the default out of the torrc,
5160 so we can update it without forcing each server operator to fix
5162 - Allow imaps and pop3s in default exit policy
5164 - Prevent picking middleman nodes as the last node in the circuit
5167 Changes in version 0.0.2pre20 - 2004-01-30
5169 - We now have a deb package, and it's in debian unstable. Go to
5171 - I've split the TotalBandwidth option into BandwidthRate (how many
5172 bytes per second you want to allow, long-term) and
5173 BandwidthBurst (how many bytes you will allow at once before the cap
5174 kicks in). This better token bucket approach lets you, say, set
5175 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
5176 performance while not exceeding your monthly bandwidth quota.
5177 - Push out a tls record's worth of data once you've got it, rather
5178 than waiting until you've read everything waiting to be read. This
5179 may improve performance by pipelining better. We'll see.
5180 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
5181 from failed circuits (if they haven't been connected yet) and attach
5183 - Expire old streams that haven't managed to connect. Some day we'll
5184 have them reattach to new circuits instead.
5187 - Fix several memory leaks that were causing servers to become bloated
5189 - Fix a few very rare assert triggers. A few more remain.
5190 - Setuid to User _before_ complaining about running as root.
5193 Changes in version 0.0.2pre19 - 2004-01-07
5195 - Fix deadlock condition in dns farm. We were telling a child to die by
5196 closing the parent's file descriptor to him. But newer children were
5197 inheriting the open file descriptor from the parent, and since they
5198 weren't closing it, the socket never closed, so the child never read
5199 eof, so he never knew to exit. Similarly, dns workers were holding
5200 open other sockets, leading to all sorts of chaos.
5201 - New cleaner daemon() code for forking and backgrounding.
5202 - If you log to a file, it now prints an entry at the top of the
5203 logfile so you know it's working.
5204 - The onionskin challenge length was 30 bytes longer than necessary.
5205 - Started to patch up the spec so it's not quite so out of date.
5208 Changes in version 0.0.2pre18 - 2004-01-02
5210 - Fix endian issues with the 'integrity' field in the relay header.
5211 - Fix a potential bug where connections in state
5212 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
5215 Changes in version 0.0.2pre17 - 2003-12-30
5217 - Made --debuglogfile (or any second log file, actually) work.
5218 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
5219 adversary could force us into an infinite loop.
5222 - Each onionskin handshake now includes a hash of the computed key,
5223 to prove the server's identity and help perfect forward secrecy.
5224 - Changed cell size from 256 to 512 bytes (working toward compatibility
5226 - Changed cell length to 2 bytes, and moved it to the relay header.
5227 - Implemented end-to-end integrity checking for the payloads of
5229 - Separated streamid from 'recognized' (otherwise circuits will get
5230 messed up when we try to have streams exit from the middle). We
5231 use the integrity-checking to confirm that a cell is addressed to
5233 - Randomize the initial circid and streamid values, so an adversary who
5234 breaks into a node can't learn how many circuits or streams have
5238 Changes in version 0.0.2pre16 - 2003-12-14
5240 - Fixed a bug that made HUP trigger an assert
5241 - Fixed a bug where a circuit that immediately failed wasn't being
5242 counted as a failed circuit in counting retries.
5245 - Now we close the circuit when we get a truncated cell: otherwise we're
5246 open to an anonymity attack where a bad node in the path truncates
5247 the circuit and then we open streams at him.
5248 - Add port ranges to exit policies
5249 - Add a conservative default exit policy
5250 - Warn if you're running tor as root
5251 - on HUP, retry OR connections and close/rebind listeners
5252 - options.EntryNodes: try these nodes first when picking the first node
5253 - options.ExitNodes: if your best choices happen to include any of
5254 your preferred exit nodes, you choose among just those preferred
5256 - options.ExcludedNodes: nodes that are never picked in path building
5259 Changes in version 0.0.2pre15 - 2003-12-03
5260 o Robustness and bugfixes:
5261 - Sometimes clients would cache incorrect DNS resolves, which would
5262 really screw things up.
5263 - An OP that goes offline would slowly leak all its sockets and stop
5265 - A wide variety of bugfixes in exit node selection, exit policy
5266 handling, and processing pending streams when a new circuit is
5268 - Pick nodes for a path only from those the directory says are up
5269 - Choose randomly from all running dirservers, not always the first one
5270 - Increase allowed http header size for directory fetch.
5271 - Stop writing to stderr (if we're daemonized it will be closed).
5272 - Enable -g always, so cores will be more useful to me.
5273 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
5276 - Wrote a man page. It lists commonly used options.
5279 - Change default loglevel to warn.
5280 - Make PidFile default to null rather than littering in your CWD.
5281 - OnionRouter config option is now obsolete. Instead it just checks
5283 - Moved to a single unified torrc file for both clients and servers.
5286 Changes in version 0.0.2pre14 - 2003-11-29
5287 o Robustness and bugfixes:
5288 - Force the admin to make the DataDirectory himself
5289 - to get ownership/permissions right
5290 - so clients no longer make a DataDirectory and then never use it
5291 - fix bug where a client who was offline for 45 minutes would never
5292 pull down a directory again
5293 - fix (or at least hide really well) the dns assert bug that was
5294 causing server crashes
5295 - warnings and improved robustness wrt clockskew for certs
5296 - use the native daemon(3) to daemonize, when available
5297 - exit if bind() fails
5298 - exit if neither socksport nor orport is defined
5299 - include our own tor_timegm (Win32 doesn't have its own)
5300 - bugfix for win32 with lots of connections
5301 - fix minor bias in PRNG
5302 - make dirserver more robust to corrupt cached directory
5305 - Wrote the design document (woo)
5307 o Circuit building and exit policies:
5308 - Circuits no longer try to use nodes that the directory has told them
5310 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
5311 bitcounts (18.0.0.0/8).
5312 - Make AP connections standby for a circuit if no suitable circuit
5313 exists, rather than failing
5314 - Circuits choose exit node based on addr/port, exit policies, and
5315 which AP connections are standing by
5316 - Bump min pathlen from 2 to 3
5317 - Relay end cells have a payload to describe why the stream ended.
5318 - If the stream failed because of exit policy, try again with a new
5320 - Clients have a dns cache to remember resolved addresses.
5321 - Notice more quickly when we have no working circuits
5324 - APPort is now called SocksPort
5325 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
5327 - RecommendedVersions is now a config variable rather than
5328 hardcoded (for dirservers)
5329 - Reloads config on HUP
5330 - Usage info on -h or --help
5331 - If you set User and Group config vars, it'll setu/gid to them.
5333 Changes in version 0.0.2pre13 - 2003-10-19
5334 o General stability:
5335 - SSL_write no longer fails when it returns WANTWRITE and the number
5336 of bytes in the buf has changed by the next SSL_write call.
5337 - Fix segfault fetching directory when network is down
5338 - Fix a variety of minor memory leaks
5339 - Dirservers reload the fingerprints file on HUP, so I don't have
5340 to take down the network when I approve a new router
5341 - Default server config file has explicit Address line to specify fqdn
5344 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
5345 - Make listener connections not ever alloc bufs
5347 o Autoconf improvements:
5348 - don't clobber an external CFLAGS in ./configure
5349 - Make install now works
5350 - create var/lib/tor on make install
5351 - autocreate a tor.sh initscript to help distribs
5352 - autocreate the torrc and sample-server-torrc with correct paths
5354 o Log files and Daemonizing now work:
5355 - If --DebugLogFile is specified, log to it at -l debug
5356 - If --LogFile is specified, use it instead of commandline
5357 - If --RunAsDaemon is set, tor forks and backgrounds on startup