1 Changes in version 0.2.0.8-alpha - 2007-10-12
2 o Major features (router descriptor cache):
3 - Store routers in a file called cached-descriptors instead of in
4 cached-routers. Initialize cached-descriptors from cached-routers
5 if the old format is around. The new format allows us to store
6 annotations along with descriptors.
7 - Use annotations to record the time we received each descriptor.
8 - Use annotations to record the source for each descriptor.
9 - Use annotations to record the purpose of each descriptor.
10 - Bridge authorities now write bridge descriptors to disk, meaning
11 we can export them to other programs and begin distributing them
14 o Major features (directory authorities):
15 - When a v3 authority is missing votes or signatures, it now tries
17 - Directory authorities track weighted fractional uptime as well as
18 weighted mean-time-between failures. WFU is suitable for deciding
19 whether a node is "usually up", while MTBF is suitable for deciding
20 whether a node is "likely to stay up." We need both, because
21 "usually up" is a good requirement for guards, while "likely to
22 stay up" is a good requirement for long-lived connections.
24 o Major features (v3 directory system):
25 - Caches now download v3 network status documents as needed.
26 - Caches now download descriptors listed in their v3 network status
28 - All hosts now attempt to download and keep fresh v3 authority
29 certificates, and re-attempt after failures.
31 o Major bugfixes (performance):
32 - Fix really bad O(n^2) performance when parsing a long list of
33 routers: Instead of searching the entire list for an "extra-info "
34 string which usually wasn't there, once for every routerinfo
35 we read, just scan lines forward until we find one we like.
38 o Minor features (v3 authority system):
39 - Add more ways for tools to download the votes that lead to the
41 - Send a 503 when low on bandwidth and a vote, consensus, or
42 certificate is requested.
43 - If-modified-since is now implemented properly for all kinds of
46 o Minor bugfixes (network statuses):
47 - Tweak the implementation of proposal 109 slightly: allow at most
48 two Tor servers on the same IP address, except if it's the location
49 of a directory authority, in which case allow five. Bugfix on
52 o Minor bugfixes (controller):
53 - When sending a status event to the controller telling it that an
54 OR address is readable, set the port correctly. (Previously we
55 were reporting the dir port.) Bugfix on 0.1.2.x.
57 o Minor bugfixes (v3 directory code):
58 - Fix logic to look up a cert by its signing key digest. Bugfix on
60 - Only change the reply to a vote to "OK" if it's not already
61 set. This gets rid of annoying "400 OK" log messages, which may
62 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
63 - When we get a valid consensus, recompute the voting schedule.
64 - Base the valid-after time of a vote on the consensus voting
65 schedule, not on our preferred schedule.
66 - Make the return values and messages from signature uploads and
67 downloads more sensible.
68 - Fix a memory leak when serving votes and consensus documents, and
69 another when serving certificates.
71 o Minor bugfixes (performance):
72 - Use a slightly simpler string hashing algorithm (copying Python's
73 instead of Java's) and optimize our digest hashing algorithm to take
74 advantage of 64-bit platforms and to remove some possibly-costly
77 o Minor bugfixes (portability):
78 - On some platforms, accept() can return a broken address. Detect
79 this more quietly, and deal accordingly. (Fixes bug 483.)
81 o Minor bugfixes (DNS):
82 - It's not actually an error to find a non-pending entry in the DNS
83 cache when canceling a pending resolve. Don't log unless stuff
84 is fishy. Resolves bug 463.
86 o Minor bugfixes (anonymity):
87 - Never report that we've used more bandwidth than we're willing to
88 relay: it leaks how much non-relay traffic we're using. Resolves
91 o Minor bugfixes (of some sort):
92 - Stop calling tor_strlower() on uninitialized memory in some cases.
93 Bugfix in 0.2.0.7-alpha.
94 - Fix a minor memory leak whenever we parse guards from our state
95 file. Bugfix on 0.2.0.7-alpha.
96 - Fix a minor memory leak whenever we wrote out a file. Bugfix on
99 o Code simplifications and refactoring:
100 - Make a bunch of functions static. Remove some dead code.
101 - Pull out about a third of the really big routerlist.c; put it in a
102 new module, networkstatus.c.
103 - Merge the extra fields in local_routerstatus_t back into
104 routerstatus_t: we used to need one routerstatus_t for each
105 authority's opinion, plus a local_routerstatus_t for the locally
106 computed consensus opinion. To save space, we put the locally
107 modified fields into local_routerstatus_t, and only the common
108 stuff into routerstatus_t. But once v3 directories are in use,
109 clients and caches will no longer need to hold authority opinions;
110 thus, the rationale for keeping the types separate is now gone.
111 - Make the code used to reschedule and reattempt downloads more
113 - Turn all 'Are we a directory server/mirror?' logic into a call to
117 Changes in version 0.2.0.7-alpha - 2007-09-21
118 o New directory authorities:
119 - Set up moria1 and tor26 as the first v3 directory authorities. See
120 doc/spec/dir-spec.txt for details on the new directory design.
122 o Major bugfixes (crashes):
123 - Fix possible segfaults in functions called from
124 rend_process_relay_cell(). Bugfix on 0.1.2.x.
126 o Major bugfixes (bridges):
127 - Fix a bug that made servers send a "404 Not found" in response to
128 attempts to fetch their server descriptor. This caused Tor servers
129 to take many minutes to establish reachability for their DirPort,
130 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
131 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
132 users configure that and specify a bridge with an identity
133 fingerprint, now they will lookup the bridge descriptor at the
134 default bridge authority via a one-hop tunnel, but once circuits
135 are established they will switch to a three-hop tunnel for later
136 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
138 o Major bugfixes (hidden services):
139 - Hidden services were choosing introduction points uniquely by
140 hexdigest, but when constructing the hidden service descriptor
141 they merely wrote the (potentially ambiguous) nickname.
142 - Clients now use the v2 intro format for hidden service
143 connections: they specify their chosen rendezvous point by identity
144 digest rather than by (potentially ambiguous) nickname. Both
145 are bugfixes on 0.1.2.x, and they could speed up hidden service
146 connections dramatically. Thanks to Karsten Loesing.
148 o Minor features (security):
149 - As a client, do not believe any server that tells us that an
150 address maps to an internal address space.
151 - Make it possible to enable HashedControlPassword and
152 CookieAuthentication at the same time.
154 o Minor features (guard nodes):
155 - Tag every guard node in our state file with the version that
156 we believe added it, or with our own version if we add it. This way,
157 if a user temporarily runs an old version of Tor and then switches
158 back to a new one, she doesn't automatically lose her guards.
160 o Minor features (speed):
161 - When implementing AES counter mode, update only the portions of the
162 counter buffer that need to change, and don't keep separate
163 network-order and host-order counters when they are the same (i.e.,
164 on big-endian hosts.)
166 o Minor features (controller):
167 - Accept LF instead of CRLF on controller, since some software has a
168 hard time generating real Internet newlines.
169 - Add GETINFO values for the server status events
170 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
174 - Routers no longer include bandwidth-history lines in their
175 descriptors; this information is already available in extra-info
176 documents, and including it in router descriptors took up 60%
177 (!) of compressed router descriptor downloads. Completes
178 implementation of proposal 104.
179 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
180 and TorControl.py, as they use the old v0 controller protocol,
181 and are obsoleted by TorFlow anyway.
182 - Drop support for v1 rendezvous descriptors, since we never used
183 them anyway, and the code has probably rotted by now. Based on
184 patch from Karsten Loesing.
185 - On OSX, stop warning the user that kqueue support in libevent is
186 "experimental", since it seems to have worked fine for ages.
189 - When generating information telling us how to extend to a given
190 router, do not try to include the nickname if it is absent. Fixes
191 bug 467. Bugfix on 0.2.0.3-alpha.
192 - Fix a user-triggerable (but not remotely-triggerable) segfault
193 in expand_filename(). Bugfix on 0.1.2.x.
194 - Fix a memory leak when freeing incomplete requests from DNSPort.
195 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
196 - Don't try to access (or alter) the state file when running
197 --list-fingerprint or --verify-config or --hash-password. (Resolves
198 bug 499.) Bugfix on 0.1.2.x.
199 - Servers used to decline to publish their DirPort if their
200 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
201 were below a threshold. Now they only look at BandwidthRate and
202 RelayBandwidthRate. Bugfix on 0.1.2.x.
203 - Remove an optimization in the AES counter-mode code that assumed
204 that the counter never exceeded 2^68. When the counter can be set
205 arbitrarily as an IV (as it is by Karsten's new hidden services
206 code), this assumption no longer holds. Bugfix on 0.1.2.x.
207 - Resume listing "AUTHORITY" flag for authorities in network status.
208 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
210 o Code simplifications and refactoring:
211 - Revamp file-writing logic so we don't need to have the entire
212 contents of a file in memory at once before we write to disk. Tor,
214 - Turn "descriptor store" into a full-fledged type.
215 - Move all NT services code into a separate source file.
216 - Unify all code that computes medians, percentile elements, etc.
217 - Get rid of a needless malloc when parsing address policies.
220 Changes in version 0.1.2.17 - 2007-08-30
221 o Major bugfixes (security):
222 - We removed support for the old (v0) control protocol. It has been
223 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
224 become more of a headache than it's worth.
226 o Major bugfixes (load balancing):
227 - When choosing nodes for non-guard positions, weight guards
228 proportionally less, since they already have enough load. Patch
230 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
231 will allow fast Tor servers to get more attention.
232 - When we're upgrading from an old Tor version, forget our current
233 guards and pick new ones according to the new weightings. These
234 three load balancing patches could raise effective network capacity
235 by a factor of four. Thanks to Mike Perry for measurements.
237 o Major bugfixes (stream expiration):
238 - Expire not-yet-successful application streams in all cases if
239 they've been around longer than SocksTimeout. Right now there are
240 some cases where the stream will live forever, demanding a new
241 circuit every 15 seconds. Fixes bug 454; reported by lodger.
243 o Minor features (controller):
244 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
245 is valid before any authentication has been received. It tells
246 a controller what kind of authentication is expected, and what
247 protocol is spoken. Implements proposal 119.
249 o Minor bugfixes (performance):
250 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
251 greatly speeding up loading cached-routers from disk on startup.
252 - Disable sentinel-based debugging for buffer code: we squashed all
253 the bugs that this was supposed to detect a long time ago, and now
254 its only effect is to change our buffer sizes from nice powers of
255 two (which platform mallocs tend to like) to values slightly over
256 powers of two (which make some platform mallocs sad).
258 o Minor bugfixes (misc):
259 - If exit bandwidth ever exceeds one third of total bandwidth, then
260 use the correct formula to weight exit nodes when choosing paths.
261 Based on patch from Mike Perry.
262 - Choose perfectly fairly among routers when choosing by bandwidth and
263 weighting by fraction of bandwidth provided by exits. Previously, we
264 would choose with only approximate fairness, and correct ourselves
265 if we ran off the end of the list.
266 - If we require CookieAuthentication but we fail to write the
267 cookie file, we would warn but not exit, and end up in a state
268 where no controller could authenticate. Now we exit.
269 - If we require CookieAuthentication, stop generating a new cookie
270 every time we change any piece of our config.
271 - Refuse to start with certain directory authority keys, and
272 encourage people using them to stop.
273 - Terminate multi-line control events properly. Original patch
275 - Fix a minor memory leak when we fail to find enough suitable
276 servers to choose a circuit.
277 - Stop leaking part of the descriptor when we run into a particularly
278 unparseable piece of it.
281 Changes in version 0.2.0.6-alpha - 2007-08-26
282 o New directory authorities:
283 - Set up Tonga as the default bridge directory authority.
286 - Directory authorities now track servers by weighted
287 mean-times-between-failures. When we have 4 or more days of data,
288 use measured MTBF rather than declared uptime to decide whether
289 to call a router Stable. Implements proposal 108.
291 o Major bugfixes (load balancing):
292 - When choosing nodes for non-guard positions, weight guards
293 proportionally less, since they already have enough load. Patch
295 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
296 will allow fast Tor servers to get more attention.
297 - When we're upgrading from an old Tor version, forget our current
298 guards and pick new ones according to the new weightings. These
299 three load balancing patches could raise effective network capacity
300 by a factor of four. Thanks to Mike Perry for measurements.
302 o Major bugfixes (descriptor parsing):
303 - Handle unexpected whitespace better in malformed descriptors. Bug
304 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
307 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
308 GETINFO for Torstat to use until it can switch to using extrainfos.
309 - Optionally (if built with -DEXPORTMALLINFO) export the output
310 of mallinfo via http, as tor/mallinfo.txt. Only accessible
314 - Do not intermix bridge routers with controller-added
315 routers. (Bugfix on 0.2.0.x)
316 - Do not fail with an assert when accept() returns an unexpected
317 address family. Addresses but does not wholly fix bug 483. (Bugfix
319 - Let directory authorities startup even when they can't generate
320 a descriptor immediately, e.g. because they don't know their
322 - Stop putting the authentication cookie in a file called "0"
323 in your working directory if you don't specify anything for the
324 new CookieAuthFile option. Reported by Matt Edman.
325 - Make it possible to read the PROTOCOLINFO response in a way that
326 conforms to our control-spec. Reported by Matt Edman.
327 - Fix a minor memory leak when we fail to find enough suitable
328 servers to choose a circuit. Bugfix on 0.1.2.x.
329 - Stop leaking part of the descriptor when we run into a particularly
330 unparseable piece of it. Bugfix on 0.1.2.x.
331 - Unmap the extrainfo cache file on exit.
334 Changes in version 0.2.0.5-alpha - 2007-08-19
336 - Version 1 directories are no longer generated in full. Instead,
337 authorities generate and serve "stub" v1 directories that list
338 no servers. This will stop Tor versions 0.1.0.x and earlier from
339 working, but (for security reasons) nobody should be running those
342 o Major bugfixes (compilation, 0.2.0.x):
343 - Try to fix Win32 compilation again: improve checking for IPv6 types.
344 - Try to fix MSVC compilation: build correctly on platforms that do
345 not define s6_addr16 or s6_addr32.
346 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
349 o Major bugfixes (stream expiration):
350 - Expire not-yet-successful application streams in all cases if
351 they've been around longer than SocksTimeout. Right now there are
352 some cases where the stream will live forever, demanding a new
353 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
356 o Minor features (directory servers):
357 - When somebody requests a list of statuses or servers, and we have
358 none of those, return a 404 rather than an empty 200.
360 o Minor features (directory voting):
361 - Store v3 consensus status consensuses on disk, and reload them
364 o Minor features (security):
365 - Warn about unsafe ControlPort configurations.
366 - Refuse to start with certain directory authority keys, and
367 encourage people using them to stop.
369 o Minor features (controller):
370 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
371 is valid before any authentication has been received. It tells
372 a controller what kind of authentication is expected, and what
373 protocol is spoken. Implements proposal 119.
374 - New config option CookieAuthFile to choose a new location for the
375 cookie authentication file, and config option
376 CookieAuthFileGroupReadable to make it group-readable.
378 o Minor features (unit testing):
379 - Add command-line arguments to unit-test executable so that we can
380 invoke any chosen test from the command line rather than having
381 to run the whole test suite at once; and so that we can turn on
382 logging for the unit tests.
384 o Minor bugfixes (on 0.1.2.x):
385 - If we require CookieAuthentication but we fail to write the
386 cookie file, we would warn but not exit, and end up in a state
387 where no controller could authenticate. Now we exit.
388 - If we require CookieAuthentication, stop generating a new cookie
389 every time we change any piece of our config.
390 - When loading bandwidth history, do not believe any information in
391 the future. Fixes bug 434.
392 - When loading entry guard information, do not believe any information
394 - When we have our clock set far in the future and generate an
395 onion key, then re-set our clock to be correct, we should not stop
396 the onion key from getting rotated.
397 - Clean up torrc sample config file.
398 - Do not automatically run configure from autogen.sh. This
399 non-standard behavior tended to annoy people who have built other
402 o Minor bugfixes (on 0.2.0.x):
403 - Fix a bug with AutomapHostsOnResolve that would always cause
404 the second request to fail. Bug reported by Kate. Bugfix on
406 - Fix a bug in ADDRMAP controller replies that would sometimes
407 try to print a NULL. Patch from tup.
408 - Read v3 directory authority keys from the right location.
409 - Numerous bugfixes to directory voting code.
412 Changes in version 0.1.2.16 - 2007-08-01
413 o Major security fixes:
414 - Close immediately after missing authentication on control port;
415 do not allow multiple authentication attempts.
418 Changes in version 0.2.0.4-alpha - 2007-08-01
419 o Major security fixes:
420 - Close immediately after missing authentication on control port;
421 do not allow multiple authentication attempts.
423 o Major bugfixes (compilation):
424 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
427 o Minor features (performance):
428 - Be even more aggressive about releasing RAM from small
429 empty buffers. Thanks to our free-list code, this shouldn't be too
430 performance-intensive.
431 - Disable sentinel-based debugging for buffer code: we squashed all
432 the bugs that this was supposed to detect a long time ago, and
433 now its only effect is to change our buffer sizes from nice
434 powers of two (which platform mallocs tend to like) to values
435 siightly over powers of two (which make some platform mallocs sad).
436 - Log malloc statistics from mallinfo() on platforms where it
440 Changes in version 0.2.0.3-alpha - 2007-07-29
442 - The first pieces of our "bridge" design for blocking-resistance
443 are implemented. People can run bridge directory authorities;
444 people can run bridges; and people can configure their Tor clients
445 with a set of bridges to use as the first hop into the Tor network.
446 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
448 - Create listener connections before we setuid to the configured
449 User and Group. Now non-Windows users can choose port values
450 under 1024, start Tor as root, and have Tor bind those ports
451 before it changes to another UID. (Windows users could already
453 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
454 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
455 on "vserver" accounts. (Patch from coderman.)
456 - Be even more aggressive about separating local traffic from relayed
457 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
459 o Major features (experimental):
460 - First cut of code for "v3 dir voting": directory authorities will
461 vote on a common network status document rather than each publishing
462 their own opinion. This code needs more testing and more corner-case
463 handling before it's ready for use.
466 - Directory authorities now call routers Fast if their bandwidth is
467 at least 100KB/s, and consider their bandwidth adequate to be a
468 Guard if it is at least 250KB/s, no matter the medians. This fix
469 complements proposal 107. [Bugfix on 0.1.2.x]
470 - Directory authorities now never mark more than 3 servers per IP as
471 Valid and Running. (Implements proposal 109, by Kevin Bauer and
473 - Minor change to organizationName and commonName generation
474 procedures in TLS certificates during Tor handshakes, to invalidate
475 some earlier censorware approaches. This is not a long-term
476 solution, but applying it will give us a bit of time to look into
477 the epidemiology of countermeasures as they spread.
479 o Major bugfixes (directory):
480 - Rewrite directory tokenization code to never run off the end of
481 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
483 o Minor features (controller):
484 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
485 match requests to applications. (Patch from Robert Hogan.)
486 - Report address and port correctly on connections to DNSPort. (Patch
488 - Add a RESOLVE command to launch hostname lookups. (Original patch
490 - Add GETINFO status/enough-dir-info to let controllers tell whether
491 Tor has downloaded sufficient directory information. (Patch
493 - You can now use the ControlSocket option to tell Tor to listen for
494 controller connections on Unix domain sockets on systems that
495 support them. (Patch from Peter Palfrader.)
496 - STREAM NEW events are generated for DNSPort requests and for
497 tunneled directory connections. (Patch from Robert Hogan.)
498 - New "GETINFO address-mappings/*" command to get address mappings
499 with expiry information. "addr-mappings/*" is now deprecated.
502 o Minor features (misc):
503 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
505 - The tor-gencert tool for v3 directory authorities now creates all
506 files as readable to the file creator only, and write-protects
507 the authority identity key.
508 - When dumping memory usage, list bytes used in buffer memory
510 - When running with dmalloc, dump more stats on hup and on exit.
511 - Directory authorities now fail quickly and (relatively) harmlessly
512 if they generate a network status document that is somehow
515 o Traffic load balancing improvements:
516 - If exit bandwidth ever exceeds one third of total bandwidth, then
517 use the correct formula to weight exit nodes when choosing paths.
518 (Based on patch from Mike Perry.)
519 - Choose perfectly fairly among routers when choosing by bandwidth and
520 weighting by fraction of bandwidth provided by exits. Previously, we
521 would choose with only approximate fairness, and correct ourselves
522 if we ran off the end of the list. [Bugfix on 0.1.2.x]
524 o Performance improvements:
525 - Be more aggressive with freeing buffer RAM or putting it on the
527 - Use Critical Sections rather than Mutexes for synchronizing threads
528 on win32; Mutexes are heavier-weight, and designed for synchronizing
531 o Deprecated and removed features:
532 - RedirectExits is now deprecated.
533 - Stop allowing address masks that do not correspond to bit prefixes.
534 We have warned about these for a really long time; now it's time
535 to reject them. (Patch from croup.)
537 o Minor bugfixes (directory):
538 - Fix another crash bug related to extra-info caching. (Bug found by
539 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
540 - Directories no longer return a "304 not modified" when they don't
541 have the networkstatus the client asked for. Also fix a memory
542 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
543 - We had accidentally labelled 0.1.2.x directory servers as not
544 suitable for begin_dir requests, and had labelled no directory
545 servers as suitable for uploading extra-info documents. [Bugfix
548 o Minor bugfixes (dns):
549 - Fix a crash when DNSPort is set more than once. (Patch from Robert
550 Hogan.) [Bugfix on 0.2.0.2-alpha]
551 - Add DNSPort connections to the global connection list, so that we
552 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
554 - Fix a dangling reference that could lead to a crash when DNSPort is
555 changed or closed (Patch from Robert Hogan.) [Bugfix on
558 o Minor bugfixes (controller):
559 - Provide DNS expiry times in GMT, not in local time. For backward
560 compatibility, ADDRMAP events only provide GMT expiry in an extended
561 field. "GETINFO address-mappings" always does the right thing.
562 - Use CRLF line endings properly in NS events.
563 - Terminate multi-line control events properly. (Original patch
564 from tup.) [Bugfix on 0.1.2.x-alpha]
565 - Do not include spaces in SOURCE_ADDR fields in STREAM
566 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
569 Changes in version 0.1.2.15 - 2007-07-17
570 o Major bugfixes (compilation):
571 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
573 o Major bugfixes (crashes):
574 - Try even harder not to dereference the first character after
575 an mmap(). Reported by lodger.
576 - Fix a crash bug in directory authorities when we re-number the
577 routerlist while inserting a new router.
578 - When the cached-routers file is an even multiple of the page size,
579 don't run off the end and crash. (Fixes bug 455; based on idea
581 - Fix eventdns.c behavior on Solaris: It is critical to include
582 orconfig.h _before_ sys/types.h, so that we can get the expected
583 definition of _FILE_OFFSET_BITS.
585 o Major bugfixes (security):
586 - Fix a possible buffer overrun when using BSD natd support. Bug
588 - When sending destroy cells from a circuit's origin, don't include
589 the reason for tearing down the circuit. The spec says we didn't,
590 and now we actually don't. Reported by lodger.
591 - Keep streamids from different exits on a circuit separate. This
592 bug may have allowed other routers on a given circuit to inject
593 cells into streams. Reported by lodger; fixes bug 446.
594 - If there's a never-before-connected-to guard node in our list,
595 never choose any guards past it. This way we don't expand our
596 guard list unless we need to.
598 o Minor bugfixes (guard nodes):
599 - Weight guard selection by bandwidth, so that low-bandwidth nodes
600 don't get overused as guards.
602 o Minor bugfixes (directory):
603 - Correctly count the number of authorities that recommend each
604 version. Previously, we were under-counting by 1.
605 - Fix a potential crash bug when we load many server descriptors at
606 once and some of them make others of them obsolete. Fixes bug 458.
608 o Minor bugfixes (hidden services):
609 - Stop tearing down the whole circuit when the user asks for a
610 connection to a port that the hidden service didn't configure.
613 o Minor bugfixes (misc):
614 - On Windows, we were preventing other processes from reading
615 cached-routers while Tor was running. Reported by janbar.
616 - Fix a possible (but very unlikely) bug in picking routers by
617 bandwidth. Add a log message to confirm that it is in fact
618 unlikely. Patch from lodger.
619 - Backport a couple of memory leak fixes.
620 - Backport miscellaneous cosmetic bugfixes.
623 Changes in version 0.2.0.2-alpha - 2007-06-02
624 o Major bugfixes on 0.2.0.1-alpha:
625 - Fix an assertion failure related to servers without extra-info digests.
626 Resolves bugs 441 and 442.
628 o Minor features (directory):
629 - Support "If-Modified-Since" when answering HTTP requests for
630 directories, running-routers documents, and network-status documents.
631 (There's no need to support it for router descriptors, since those
632 are downloaded by descriptor digest.)
634 o Minor build issues:
635 - Clear up some MIPSPro compiler warnings.
636 - When building from a tarball on a machine that happens to have SVK
637 installed, report the micro-revision as whatever version existed
638 in the tarball, not as "x".
641 Changes in version 0.2.0.1-alpha - 2007-06-01
642 o Major features, server usability:
643 - New config options RelayBandwidthRate and RelayBandwidthBurst:
644 a separate set of token buckets for relayed traffic. Right now
645 relayed traffic is defined as answers to directory requests, and
646 OR connections that don't have any local circuits on them.
648 o Major features, client usability:
649 - A client-side DNS proxy feature to replace the need for
650 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
651 for DNS requests on port 9999, use the Tor network to resolve them
652 anonymously, and send the reply back like a regular DNS server.
653 The code still only implements a subset of DNS.
654 - Make PreferTunneledDirConns and TunnelDirConns work even when
655 we have no cached directory info. This means Tor clients can now
656 do all of their connections protected by TLS.
658 o Major features, performance and efficiency:
659 - Directory authorities accept and serve "extra info" documents for
660 routers. These documents contain fields from router descriptors
661 that aren't usually needed, and that use a lot of excess
662 bandwidth. Once these fields are removed from router descriptors,
663 the bandwidth savings should be about 60%. [Partially implements
665 - Servers upload extra-info documents to any authority that accepts
666 them. Authorities (and caches that have been configured to download
667 extra-info documents) download them as needed. [Partially implements
669 - Change the way that Tor buffers data that it is waiting to write.
670 Instead of queueing data cells in an enormous ring buffer for each
671 client->OR or OR->OR connection, we now queue cells on a separate
672 queue for each circuit. This lets us use less slack memory, and
673 will eventually let us be smarter about prioritizing different kinds
675 - Use memory pools to allocate cells with better speed and memory
676 efficiency, especially on platforms where malloc() is inefficient.
677 - Stop reading on edge connections when their corresponding circuit
678 buffers are full; start again as the circuits empty out.
680 o Major features, other:
681 - Add an HSAuthorityRecordStats option that hidden service authorities
682 can use to track statistics of overall hidden service usage without
683 logging information that would be very useful to an attacker.
684 - Start work implementing multi-level keys for directory authorities:
685 Add a standalone tool to generate key certificates. (Proposal 103.)
688 - Directory authorities now call routers Stable if they have an
689 uptime of at least 30 days, even if that's not the median uptime
690 in the network. Implements proposal 107, suggested by Kevin Bauer
693 o Minor fixes (resource management):
694 - Count the number of open sockets separately from the number
695 of active connection_t objects. This will let us avoid underusing
696 our allocated connection limit.
697 - We no longer use socket pairs to link an edge connection to an
698 anonymous directory connection or a DirPort test connection.
699 Instead, we track the link internally and transfer the data
700 in-process. This saves two sockets per "linked" connection (at the
701 client and at the server), and avoids the nasty Windows socketpair()
703 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
704 for every single inactive connection_t. Free items from the
705 4k/16k-buffer free lists when they haven't been used for a while.
707 o Minor features (build):
708 - Make autoconf search for libevent, openssl, and zlib consistently.
709 - Update deprecated macros in configure.in.
710 - When warning about missing headers, tell the user to let us
711 know if the compile succeeds anyway, so we can downgrade the
713 - Include the current subversion revision as part of the version
714 string: either fetch it directly if we're in an SVN checkout, do
715 some magic to guess it if we're in an SVK checkout, or use
716 the last-detected version if we're building from a .tar.gz.
717 Use this version consistently in log messages.
719 o Minor features (logging):
720 - Always prepend "Bug: " to any log message about a bug.
721 - Put a platform string (e.g. "Linux i686") in the startup log
722 message, so when people paste just their logs, we know if it's
723 OpenBSD or Windows or what.
724 - When logging memory usage, break down memory used in buffers by
727 o Minor features (directory system):
728 - New config option V2AuthoritativeDirectory that all directory
729 authorities should set. This will let future authorities choose
730 not to serve V2 directory information.
731 - Directory authorities allow multiple router descriptors and/or extra
732 info documents to be uploaded in a single go. This will make
733 implementing proposal 104 simpler.
735 o Minor features (controller):
736 - Add a new config option __DisablePredictedCircuits designed for
737 use by the controller, when we don't want Tor to build any circuits
739 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
740 so we can exit from the middle of the circuit.
741 - Implement "getinfo status/circuit-established".
742 - Implement "getinfo status/version/..." so a controller can tell
743 whether the current version is recommended, and whether any versions
744 are good, and how many authorities agree. (Patch from shibz.)
746 o Minor features (hidden services):
747 - Allow multiple HiddenServicePort directives with the same virtual
748 port; when they occur, the user is sent round-robin to one
749 of the target ports chosen at random. Partially fixes bug 393 by
750 adding limited ad-hoc round-robining.
752 o Minor features (other):
754 - Add a new AutomapHostsOnResolve option: when it is enabled, any
755 resolve request for hosts matching a given pattern causes Tor to
756 generate an internal virtual address mapping for that host. This
757 allows DNSPort to work sensibly with hidden service users. By
758 default, .exit and .onion addresses are remapped; the list of
759 patterns can be reconfigured with AutomapHostsSuffixes.
760 - Add an "-F" option to tor-resolve to force a resolve for a .onion
761 address. Thanks to the AutomapHostsOnResolve option, this is no
762 longer a completely silly thing to do.
763 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
764 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
765 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
766 minus 1 byte: the actual maximum declared bandwidth.
769 - Removed support for the old binary "version 0" controller protocol.
770 This has been deprecated since 0.1.1, and warnings have been issued
771 since 0.1.2. When we encounter a v0 control message, we now send
772 back an error and close the connection.
773 - Remove the old "dns worker" server DNS code: it hasn't been default
774 since 0.1.2.2-alpha, and all the servers seem to be using the new
777 o Minor bugfixes (portability):
778 - Even though Windows is equally happy with / and \ as path separators,
779 try to use \ consistently on Windows and / consistently on Unix: it
780 makes the log messages nicer.
781 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
782 - Read resolv.conf files correctly on platforms where read() returns
783 partial results on small file reads.
785 o Minor bugfixes (directory):
786 - Correctly enforce that elements of directory objects do not appear
787 more often than they are allowed to appear.
788 - When we are reporting the DirServer line we just parsed, we were
789 logging the second stanza of the key fingerprint, not the first.
791 o Minor bugfixes (logging):
792 - When we hit an EOF on a log (probably because we're shutting down),
793 don't try to remove the log from the list: just mark it as
794 unusable. (Bulletproofs against bug 222.)
796 o Minor bugfixes (other):
797 - In the exitlist script, only consider the most recently published
798 server descriptor for each server. Also, when the user requests
799 a list of servers that _reject_ connections to a given address,
800 explicitly exclude the IPs that also have servers that accept
801 connections to that address. (Resolves bug 405.)
802 - Stop allowing hibernating servers to be "stable" or "fast".
803 - On Windows, we were preventing other processes from reading
804 cached-routers while Tor was running. (Reported by janbar)
805 - Make the NodeFamilies config option work. (Reported by
806 lodger -- it has never actually worked, even though we added it
808 - Check return values from pthread_mutex functions.
809 - Don't save non-general-purpose router descriptors to the disk cache,
810 because we have no way of remembering what their purpose was when
812 - Add even more asserts to hunt down bug 417.
813 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
814 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
815 Add a log message to confirm that it is in fact unlikely.
817 o Minor bugfixes (controller):
818 - Make 'getinfo fingerprint' return a 551 error if we're not a
819 server, so we match what the control spec claims we do. Reported
821 - Fix a typo in an error message when extendcircuit fails that
822 caused us to not follow the \r\n-based delimiter protocol. Reported
825 o Code simplifications and refactoring:
826 - Stop passing around circuit_t and crypt_path_t pointers that are
827 implicit in other procedure arguments.
828 - Drop the old code to choke directory connections when the
829 corresponding OR connections got full: thanks to the cell queue
830 feature, OR conns don't get full any more.
831 - Make dns_resolve() handle attaching connections to circuits
832 properly, so the caller doesn't have to.
833 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
834 - Keep the connection array as a dynamic smartlist_t, rather than as
835 a fixed-sized array. This is important, as the number of connections
836 is becoming increasingly decoupled from the number of sockets.
839 Changes in version 0.1.2.14 - 2007-05-25
840 o Directory authority changes:
841 - Two directory authorities (moria1 and moria2) just moved to new
842 IP addresses. This change will particularly affect those who serve
843 or use hidden services.
845 o Major bugfixes (crashes):
846 - If a directory server runs out of space in the connection table
847 as it's processing a begin_dir request, it will free the exit stream
848 but leave it attached to the circuit, leading to unpredictable
849 behavior. (Reported by seeess, fixes bug 425.)
850 - Fix a bug in dirserv_remove_invalid() that would cause authorities
851 to corrupt memory under some really unlikely scenarios.
852 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
853 - Avoid segfaults when reading from mmaped descriptor file. (Reported
856 o Major bugfixes (security):
857 - When choosing an entry guard for a circuit, avoid using guards
858 that are in the same family as the chosen exit -- not just guards
859 that are exactly the chosen exit. (Reported by lodger.)
861 o Major bugfixes (resource management):
862 - If a directory authority is down, skip it when deciding where to get
863 networkstatus objects or descriptors. Otherwise we keep asking
864 every 10 seconds forever. Fixes bug 384.
865 - Count it as a failure if we fetch a valid network-status but we
866 don't want to keep it. Otherwise we'll keep fetching it and keep
867 not wanting to keep it. Fixes part of bug 422.
868 - If all of our dirservers have given us bad or no networkstatuses
869 lately, then stop hammering them once per minute even when we
870 think they're failed. Fixes another part of bug 422.
873 - Actually set the purpose correctly for descriptors inserted with
875 - When we have k non-v2 authorities in our DirServer config,
876 we ignored the last k authorities in the list when updating our
878 - Correctly back-off from requesting router descriptors that we are
879 having a hard time downloading.
880 - Read resolv.conf files correctly on platforms where read() returns
881 partial results on small file reads.
882 - Don't rebuild the entire router store every time we get 32K of
883 routers: rebuild it when the journal gets very large, or when
884 the gaps in the store get very large.
887 - When routers publish SVN revisions in their router descriptors,
888 authorities now include those versions correctly in networkstatus
890 - Warn when using a version of libevent before 1.3b to run a server on
891 OSX or BSD: these versions interact badly with userspace threads.
894 Changes in version 0.1.2.13 - 2007-04-24
896 - Fix a memory leak when we ask for "all" networkstatuses and we
897 get one we don't recognize.
898 - Add more asserts to hunt down bug 417.
899 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
902 Changes in version 0.1.2.12-rc - 2007-03-16
904 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
905 directory information requested inside Tor connections (i.e. via
906 begin_dir cells). It only triggered when the same connection was
907 serving other data at the same time. Reported by seeess.
910 - When creating a circuit via the controller, send a 'launched'
911 event when we're done, so we follow the spec better.
914 Changes in version 0.1.2.11-rc - 2007-03-15
915 o Minor bugfixes (controller), reported by daejees:
916 - Correct the control spec to match how the code actually responds
917 to 'getinfo addr-mappings/*'.
918 - The control spec described a GUARDS event, but the code
919 implemented a GUARD event. Standardize on GUARD, but let people
923 Changes in version 0.1.2.10-rc - 2007-03-07
924 o Major bugfixes (Windows):
925 - Do not load the NT services library functions (which may not exist)
926 just to detect if we're a service trying to shut down. Now we run
927 on Win98 and friends again.
929 o Minor bugfixes (other):
930 - Clarify a couple of log messages.
931 - Fix a misleading socks5 error number.
934 Changes in version 0.1.2.9-rc - 2007-03-02
935 o Major bugfixes (Windows):
936 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
937 of the usual GCC "%llu". This prevents a bug when saving 64-bit
938 int configuration values: the high-order 32 bits would get
939 truncated. In particular, we were being bitten by the default
940 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
941 and maybe also bug 397.)
943 o Minor bugfixes (performance):
944 - Use OpenSSL's AES implementation on platforms where it's faster.
945 This could save us as much as 10% CPU usage.
947 o Minor bugfixes (server):
948 - Do not rotate onion key immediately after setting it for the first
951 o Minor bugfixes (directory authorities):
952 - Stop calling servers that have been hibernating for a long time
953 "stable". Also, stop letting hibernating or obsolete servers affect
954 uptime and bandwidth cutoffs.
955 - Stop listing hibernating servers in the v1 directory.
957 o Minor bugfixes (hidden services):
958 - Upload hidden service descriptors slightly less often, to reduce
961 o Minor bugfixes (other):
962 - Fix an assert that could trigger if a controller quickly set then
963 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
964 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
966 - Fix a potential race condition in the rpm installer. Found by
968 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
969 of 2 as indicating that the server is completely bad; it sometimes
970 means that the server is just bad for the request in question. (may fix
971 the last of bug 326.)
972 - Disable encrypted directory connections when we don't have a server
973 descriptor for the destination. We'll get this working again in
977 Changes in version 0.1.2.8-beta - 2007-02-26
978 o Major bugfixes (crashes):
979 - Stop crashing when the controller asks us to resetconf more than
980 one config option at once. (Vidalia 0.0.11 does this.)
981 - Fix a crash that happened on Win98 when we're given command-line
982 arguments: don't try to load NT service functions from advapi32.dll
983 except when we need them. (Bug introduced in 0.1.2.7-alpha;
985 - Fix a longstanding obscure crash bug that could occur when
986 we run out of DNS worker processes. (Resolves bug 390.)
988 o Major bugfixes (hidden services):
989 - Correctly detect whether hidden service descriptor downloads are
990 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
992 o Major bugfixes (accounting):
993 - When we start during an accounting interval before it's time to wake
994 up, remember to wake up at the correct time. (May fix bug 342.)
996 o Minor bugfixes (controller):
997 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
998 clear the corresponding on_circuit variable, and remember later
999 that we don't need to send a redundant CLOSED event. (Resolves part
1001 - Report events where a resolve succeeded or where we got a socks
1002 protocol error correctly, rather than calling both of them
1004 - Change reported stream target addresses to IP consistently when
1005 we finally get the IP from an exit node.
1006 - Send log messages to the controller even if they happen to be very
1009 o Minor bugfixes (other):
1010 - Display correct results when reporting which versions are
1011 recommended, and how recommended they are. (Resolves bug 383.)
1012 - Improve our estimates for directory bandwidth to be less random:
1013 guess that an unrecognized directory will have the average bandwidth
1014 from all known directories, not that it will have the average
1015 bandwidth from those directories earlier than it on the list.
1016 - If we start a server with ClientOnly 1, then set ClientOnly to 0
1017 and hup, stop triggering an assert based on an empty onion_key.
1018 - On platforms with no working mmap() equivalent, don't warn the
1019 user when cached-routers doesn't exist.
1020 - Warn the user when mmap() [or its equivalent] fails for some reason
1021 other than file-not-found.
1022 - Don't warn the user when cached-routers.new doesn't exist: that's
1023 perfectly fine when starting up for the first time.
1024 - When EntryNodes are configured, rebuild the guard list to contain,
1025 in order: the EntryNodes that were guards before; the rest of the
1026 EntryNodes; the nodes that were guards before.
1027 - Mask out all signals in sub-threads; only the libevent signal
1028 handler should be processing them. This should prevent some crashes
1029 on some machines using pthreads. (Patch from coderman.)
1030 - Fix switched arguments on memset in the implementation of
1031 tor_munmap() for systems with no mmap() call.
1032 - When Tor receives a router descriptor that it asked for, but
1033 no longer wants (because it has received fresh networkstatuses
1034 in the meantime), do not warn the user. Cache the descriptor if
1035 we're a cache; drop it if we aren't.
1036 - Make earlier entry guards _really_ get retried when the network
1038 - On a malformed DNS reply, always give an error to the corresponding
1040 - Build with recent libevents on platforms that do not define the
1041 nonstandard types "u_int8_t" and friends.
1043 o Minor features (controller):
1044 - Warn the user when an application uses the obsolete binary v0
1045 control protocol. We're planning to remove support for it during
1046 the next development series, so it's good to give people some
1048 - Add STREAM_BW events to report per-entry-stream bandwidth
1049 use. (Patch from Robert Hogan.)
1050 - Rate-limit SIGNEWNYM signals in response to controllers that
1051 impolitely generate them for every single stream. (Patch from
1052 mwenge; closes bug 394.)
1053 - Make REMAP stream events have a SOURCE (cache or exit), and
1054 make them generated in every case where we get a successful
1055 connected or resolved cell.
1057 o Minor bugfixes (performance):
1058 - Call router_have_min_dir_info half as often. (This is showing up in
1059 some profiles, but not others.)
1060 - When using GCC, make log_debug never get called at all, and its
1061 arguments never get evaluated, when no debug logs are configured.
1062 (This is showing up in some profiles, but not others.)
1065 - Remove some never-implemented options. Mark PathlenCoinWeight as
1067 - Implement proposal 106: Stop requiring clients to have well-formed
1068 certificates; stop checking nicknames in certificates. (Clients
1069 have certificates so that they can look like Tor servers, but in
1070 the future we might want to allow them to look like regular TLS
1071 clients instead. Nicknames in certificates serve no purpose other
1072 than making our protocol easier to recognize on the wire.)
1073 - Revise messages on handshake failure again to be even more clear about
1074 which are incoming connections and which are outgoing.
1075 - Discard any v1 directory info that's over 1 month old (for
1076 directories) or over 1 week old (for running-routers lists).
1077 - Do not warn when individual nodes in the configuration's EntryNodes,
1078 ExitNodes, etc are down: warn only when all possible nodes
1079 are down. (Fixes bug 348.)
1080 - Always remove expired routers and networkstatus docs before checking
1081 whether we have enough information to build circuits. (Fixes
1083 - Put a lower-bound on MaxAdvertisedBandwidth.
1086 Changes in version 0.1.2.7-alpha - 2007-02-06
1087 o Major bugfixes (rate limiting):
1088 - Servers decline directory requests much more aggressively when
1089 they're low on bandwidth. Otherwise they end up queueing more and
1090 more directory responses, which can't be good for latency.
1091 - But never refuse directory requests from local addresses.
1092 - Fix a memory leak when sending a 503 response for a networkstatus
1094 - Be willing to read or write on local connections (e.g. controller
1095 connections) even when the global rate limiting buckets are empty.
1096 - If our system clock jumps back in time, don't publish a negative
1097 uptime in the descriptor. Also, don't let the global rate limiting
1098 buckets go absurdly negative.
1099 - Flush local controller connection buffers periodically as we're
1100 writing to them, so we avoid queueing 4+ megabytes of data before
1103 o Major bugfixes (NT services):
1104 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
1105 command-line flag so that admins can override the default by saying
1106 "tor --service install --user "SomeUser"". This will not affect
1107 existing installed services. Also, warn the user that the service
1108 will look for its configuration file in the service user's
1109 %appdata% directory. (We can't do the 'hardwire the user's appdata
1110 directory' trick any more, since we may not have read access to that
1113 o Major bugfixes (other):
1114 - Previously, we would cache up to 16 old networkstatus documents
1115 indefinitely, if they came from nontrusted authorities. Now we
1116 discard them if they are more than 10 days old.
1117 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
1119 - Detect and reject malformed DNS responses containing circular
1121 - If exits are rare enough that we're not marking exits as guards,
1122 ignore exit bandwidth when we're deciding the required bandwidth
1124 - When we're handling a directory connection tunneled over Tor,
1125 don't fill up internal memory buffers with all the data we want
1126 to tunnel; instead, only add it if the OR connection that will
1127 eventually receive it has some room for it. (This can lead to
1128 slowdowns in tunneled dir connections; a better solution will have
1131 o Minor bugfixes (dns):
1132 - Add some defensive programming to eventdns.c in an attempt to catch
1133 possible memory-stomping bugs.
1134 - Detect and reject DNS replies containing IPv4 or IPv6 records with
1135 an incorrect number of bytes. (Previously, we would ignore the
1137 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
1138 in the correct order, and doesn't crash.
1139 - Free memory held in recently-completed DNS lookup attempts on exit.
1140 This was not a memory leak, but may have been hiding memory leaks.
1141 - Handle TTL values correctly on reverse DNS lookups.
1142 - Treat failure to parse resolv.conf as an error.
1144 o Minor bugfixes (other):
1145 - Fix crash with "tor --list-fingerprint" (reported by seeess).
1146 - When computing clock skew from directory HTTP headers, consider what
1147 time it was when we finished asking for the directory, not what
1149 - Expire socks connections if they spend too long waiting for the
1150 handshake to finish. Previously we would let them sit around for
1151 days, if the connecting application didn't close them either.
1152 - And if the socks handshake hasn't started, don't send a
1153 "DNS resolve socks failed" handshake reply; just close it.
1154 - Stop using C functions that OpenBSD's linker doesn't like.
1155 - Don't launch requests for descriptors unless we have networkstatuses
1156 from at least half of the authorities. This delays the first
1157 download slightly under pathological circumstances, but can prevent
1158 us from downloading a bunch of descriptors we don't need.
1159 - Do not log IPs with TLS failures for incoming TLS
1160 connections. (Fixes bug 382.)
1161 - If the user asks to use invalid exit nodes, be willing to use
1163 - Stop using the reserved ac_cv namespace in our configure script.
1164 - Call stat() slightly less often; use fstat() when possible.
1165 - Refactor the way we handle pending circuits when an OR connection
1166 completes or fails, in an attempt to fix a rare crash bug.
1167 - Only rewrite a conn's address based on X-Forwarded-For: headers
1168 if it's a parseable public IP address; and stop adding extra quotes
1169 to the resulting address.
1172 - Weight directory requests by advertised bandwidth. Now we can
1173 let servers enable write limiting but still allow most clients to
1174 succeed at their directory requests. (We still ignore weights when
1175 choosing a directory authority; I hope this is a feature.)
1178 - Create a new file ReleaseNotes which was the old ChangeLog. The
1179 new ChangeLog file now includes the summaries for all development
1181 - Check for addresses with invalid characters at the exit as well
1182 as at the client, and warn less verbosely when they fail. You can
1183 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
1184 - Adapt a patch from goodell to let the contrib/exitlist script
1185 take arguments rather than require direct editing.
1186 - Inform the server operator when we decide not to advertise a
1187 DirPort due to AccountingMax enabled or a low BandwidthRate. It
1188 was confusing Zax, so now we're hopefully more helpful.
1189 - Bring us one step closer to being able to establish an encrypted
1190 directory tunnel without knowing a descriptor first. Still not
1191 ready yet. As part of the change, now assume we can use a
1192 create_fast cell if we don't know anything about a router.
1193 - Allow exit nodes to use nameservers running on ports other than 53.
1194 - Servers now cache reverse DNS replies.
1195 - Add an --ignore-missing-torrc command-line option so that we can
1196 get the "use sensible defaults if the configuration file doesn't
1197 exist" behavior even when specifying a torrc location on the command
1200 o Minor features (controller):
1201 - Track reasons for OR connection failure; make these reasons
1202 available via the controller interface. (Patch from Mike Perry.)
1203 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
1204 can learn when clients are sending malformed hostnames to Tor.
1205 - Clean up documentation for controller status events.
1206 - Add a REMAP status to stream events to note that a stream's
1207 address has changed because of a cached address or a MapAddress
1211 Changes in version 0.1.2.6-alpha - 2007-01-09
1213 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
1214 connection handles more than 4 gigs in either direction, we crash.
1215 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
1216 advertised exit node, somebody might try to exit from us when
1217 we're bootstrapping and before we've built our descriptor yet.
1218 Refuse the connection rather than crashing.
1221 - Warn if we (as a server) find that we've resolved an address that we
1222 weren't planning to resolve.
1223 - Warn that using select() on any libevent version before 1.1 will be
1224 unnecessarily slow (even for select()).
1225 - Flush ERR-level controller status events just like we currently
1226 flush ERR-level log events, so that a Tor shutdown doesn't prevent
1227 the controller from learning about current events.
1229 o Minor features (more controller status events):
1230 - Implement EXTERNAL_ADDRESS server status event so controllers can
1231 learn when our address changes.
1232 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
1233 can learn when directories reject our descriptor.
1234 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
1235 can learn when a client application is speaking a non-socks protocol
1237 - Implement DANGEROUS_SOCKS client status event so controllers
1238 can learn when a client application is leaking DNS addresses.
1239 - Implement BUG general status event so controllers can learn when
1240 Tor is unhappy about its internal invariants.
1241 - Implement CLOCK_SKEW general status event so controllers can learn
1242 when Tor thinks the system clock is set incorrectly.
1243 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
1244 server status events so controllers can learn when their descriptors
1245 are accepted by a directory.
1246 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
1247 server status events so controllers can learn about Tor's progress in
1248 deciding whether it's reachable from the outside.
1249 - Implement BAD_LIBEVENT general status event so controllers can learn
1250 when we have a version/method combination in libevent that needs to
1252 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
1253 and DNS_USELESS server status events so controllers can learn
1254 about changes to DNS server status.
1256 o Minor features (directory):
1257 - Authorities no longer recommend exits as guards if this would shift
1258 too much load to the exit nodes.
1261 Changes in version 0.1.2.5-alpha - 2007-01-06
1263 - Enable write limiting as well as read limiting. Now we sacrifice
1264 capacity if we're pushing out lots of directory traffic, rather
1265 than overrunning the user's intended bandwidth limits.
1266 - Include TLS overhead when counting bandwidth usage; previously, we
1267 would count only the bytes sent over TLS, but not the bytes used
1269 - Support running the Tor service with a torrc not in the same
1270 directory as tor.exe and default to using the torrc located in
1271 the %appdata%\Tor\ of the user who installed the service. Patch
1273 - Servers now check for the case when common DNS requests are going to
1274 wildcarded addresses (i.e. all getting the same answer), and change
1275 their exit policy to reject *:* if it's happening.
1276 - Implement BEGIN_DIR cells, so we can connect to the directory
1277 server via TLS to do encrypted directory requests rather than
1278 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
1279 config options if you like.
1281 o Minor features (config and docs):
1282 - Start using the state file to store bandwidth accounting data:
1283 the bw_accounting file is now obsolete. We'll keep generating it
1284 for a while for people who are still using 0.1.2.4-alpha.
1285 - Try to batch changes to the state file so that we do as few
1286 disk writes as possible while still storing important things in
1288 - The state file and the bw_accounting file get saved less often when
1289 the AvoidDiskWrites config option is set.
1290 - Make PIDFile work on Windows (untested).
1291 - Add internal descriptions for a bunch of configuration options:
1292 accessible via controller interface and in comments in saved
1294 - Reject *:563 (NNTPS) in the default exit policy. We already reject
1295 NNTP by default, so this seems like a sensible addition.
1296 - Clients now reject hostnames with invalid characters. This should
1297 avoid some inadvertent info leaks. Add an option
1298 AllowNonRFC953Hostnames to disable this behavior, in case somebody
1299 is running a private network with hosts called @, !, and #.
1300 - Add a maintainer script to tell us which options are missing
1301 documentation: "make check-docs".
1302 - Add a new address-spec.txt document to describe our special-case
1303 addresses: .exit, .onion, and .noconnnect.
1305 o Minor features (DNS):
1306 - Ongoing work on eventdns infrastructure: now it has dns server
1307 and ipv6 support. One day Tor will make use of it.
1308 - Add client-side caching for reverse DNS lookups.
1309 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
1310 - When we change nameservers or IP addresses, reset and re-launch
1311 our tests for DNS hijacking.
1313 o Minor features (directory):
1314 - Authorities now specify server versions in networkstatus. This adds
1315 about 2% to the size of compressed networkstatus docs, and allows
1316 clients to tell which servers support BEGIN_DIR and which don't.
1317 The implementation is forward-compatible with a proposed future
1318 protocol version scheme not tied to Tor versions.
1319 - DirServer configuration lines now have an orport= option so
1320 clients can open encrypted tunnels to the authorities without
1321 having downloaded their descriptors yet. Enabled for moria1,
1322 moria2, tor26, and lefkada now in the default configuration.
1323 - Directory servers are more willing to send a 503 "busy" if they
1324 are near their write limit, especially for v1 directory requests.
1325 Now they can use their limited bandwidth for actual Tor traffic.
1326 - Clients track responses with status 503 from dirservers. After a
1327 dirserver has given us a 503, we try not to use it until an hour has
1328 gone by, or until we have no dirservers that haven't given us a 503.
1329 - When we get a 503 from a directory, and we're not a server, we don't
1330 count the failure against the total number of failures allowed
1331 for the thing we're trying to download.
1332 - Report X-Your-Address-Is correctly from tunneled directory
1333 connections; don't report X-Your-Address-Is when it's an internal
1334 address; and never believe reported remote addresses when they're
1336 - Protect against an unlikely DoS attack on directory servers.
1337 - Add a BadDirectory flag to network status docs so that authorities
1338 can (eventually) tell clients about caches they believe to be
1341 o Minor features (controller):
1342 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
1343 - Reimplement GETINFO so that info/names stays in sync with the
1345 - Implement "GETINFO fingerprint".
1346 - Implement "SETEVENTS GUARD" so controllers can get updates on
1347 entry guard status as it changes.
1349 o Minor features (clean up obsolete pieces):
1350 - Remove some options that have been deprecated since at least
1351 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
1352 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
1354 - We no longer look for identity and onion keys in "identity.key" and
1355 "onion.key" -- these were replaced by secret_id_key and
1356 secret_onion_key in 0.0.8pre1.
1357 - We no longer require unrecognized directory entries to be
1360 o Major bugfixes (security):
1361 - Stop sending the HttpProxyAuthenticator string to directory
1362 servers when directory connections are tunnelled through Tor.
1363 - Clients no longer store bandwidth history in the state file.
1364 - Do not log introduction points for hidden services if SafeLogging
1366 - When generating bandwidth history, round down to the nearest
1367 1k. When storing accounting data, round up to the nearest 1k.
1368 - When we're running as a server, remember when we last rotated onion
1369 keys, so that we will rotate keys once they're a week old even if
1370 we never stay up for a week ourselves.
1372 o Major bugfixes (other):
1373 - Fix a longstanding bug in eventdns that prevented the count of
1374 timed-out resolves from ever being reset. This bug caused us to
1375 give up on a nameserver the third time it timed out, and try it
1376 10 seconds later... and to give up on it every time it timed out
1378 - Take out the '5 second' timeout from the connection retry
1379 schedule. Now the first connect attempt will wait a full 10
1380 seconds before switching to a new circuit. Perhaps this will help
1381 a lot. Based on observations from Mike Perry.
1382 - Fix a bug on the Windows implementation of tor_mmap_file() that
1383 would prevent the cached-routers file from ever loading. Reported
1387 - Fix an assert failure when a directory authority sets
1388 AuthDirRejectUnlisted and then receives a descriptor from an
1389 unlisted router. Reported by seeess.
1390 - Avoid a double-free when parsing malformed DirServer lines.
1391 - Fix a bug when a BSD-style PF socket is first used. Patch from
1393 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
1394 to resolve an address at a given exit node even when they ask for
1396 - Servers no longer ever list themselves in their "family" line,
1397 even if configured to do so. This makes it easier to configure
1398 family lists conveniently.
1399 - When running as a server, don't fall back to 127.0.0.1 when no
1400 nameservers are configured in /etc/resolv.conf; instead, make the
1401 user fix resolv.conf or specify nameservers explicitly. (Resolves
1403 - Stop accepting certain malformed ports in configured exit policies.
1404 - Don't re-write the fingerprint file every restart, unless it has
1406 - Stop warning when a single nameserver fails: only warn when _all_ of
1407 our nameservers have failed. Also, when we only have one nameserver,
1408 raise the threshold for deciding that the nameserver is dead.
1409 - Directory authorities now only decide that routers are reachable
1410 if their identity keys are as expected.
1411 - When the user uses bad syntax in the Log config line, stop
1412 suggesting other bad syntax as a replacement.
1413 - Correctly detect ipv6 DNS capability on OpenBSD.
1415 o Minor bugfixes (controller):
1416 - Report the circuit number correctly in STREAM CLOSED events. Bug
1417 reported by Mike Perry.
1418 - Do not report bizarre values for results of accounting GETINFOs
1419 when the last second's write or read exceeds the allotted bandwidth.
1420 - Report "unrecognized key" rather than an empty string when the
1421 controller tries to fetch a networkstatus that doesn't exist.
1424 Changes in version 0.1.1.26 - 2006-12-14
1425 o Security bugfixes:
1426 - Stop sending the HttpProxyAuthenticator string to directory
1427 servers when directory connections are tunnelled through Tor.
1428 - Clients no longer store bandwidth history in the state file.
1429 - Do not log introduction points for hidden services if SafeLogging
1433 - Fix an assert failure when a directory authority sets
1434 AuthDirRejectUnlisted and then receives a descriptor from an
1435 unlisted router (reported by seeess).
1438 Changes in version 0.1.2.4-alpha - 2006-12-03
1440 - Add support for using natd; this allows FreeBSDs earlier than
1441 5.1.2 to have ipfw send connections through Tor without using
1442 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
1445 - Make all connections to addresses of the form ".noconnect"
1446 immediately get closed. This lets application/controller combos
1447 successfully test whether they're talking to the same Tor by
1448 watching for STREAM events.
1449 - Make cross.sh cross-compilation script work even when autogen.sh
1450 hasn't been run. (Patch from Michael Mohr.)
1451 - Statistics dumped by -USR2 now include a breakdown of public key
1452 operations, for profiling.
1455 - Fix a major leak when directory authorities parse their
1456 approved-routers list, a minor memory leak when we fail to pick
1457 an exit node, and a few rare leaks on errors.
1458 - Handle TransPort connections even when the server sends data before
1459 the client sends data. Previously, the connection would just hang
1460 until the client sent data. (Patch from tup based on patch from
1462 - Avoid assert failure when our cached-routers file is empty on
1466 - Don't log spurious warnings when we see a circuit close reason we
1467 don't recognize; it's probably just from a newer version of Tor.
1468 - Have directory authorities allow larger amounts of drift in uptime
1469 without replacing the server descriptor: previously, a server that
1470 restarted every 30 minutes could have 48 "interesting" descriptors
1472 - Start linking to the Tor specification and Tor reference manual
1473 correctly in the Windows installer.
1474 - Add Vidalia to the OS X uninstaller script, so when we uninstall
1475 Tor/Privoxy we also uninstall Vidalia.
1476 - Resume building on Irix64, and fix a lot of warnings from its
1478 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
1479 when we're running as a client.
1482 Changes in version 0.1.1.25 - 2006-11-04
1484 - When a client asks us to resolve (rather than connect to)
1485 an address, and we have a cached answer, give them the cached
1486 answer. Previously, we would give them no answer at all.
1487 - We were building exactly the wrong circuits when we predict
1488 hidden service requirements, meaning Tor would have to build all
1489 its circuits on demand.
1490 - If none of our live entry guards have a high uptime, but we
1491 require a guard with a high uptime, try adding a new guard before
1492 we give up on the requirement. This patch should make long-lived
1493 connections more stable on average.
1494 - When testing reachability of our DirPort, don't launch new
1495 tests when there's already one in progress -- unreachable
1496 servers were stacking up dozens of testing streams.
1498 o Security bugfixes:
1499 - When the user sends a NEWNYM signal, clear the client-side DNS
1500 cache too. Otherwise we continue to act on previous information.
1503 - Avoid a memory corruption bug when creating a hash table for
1505 - Avoid possibility of controller-triggered crash when misusing
1506 certain commands from a v0 controller on platforms that do not
1507 handle printf("%s",NULL) gracefully.
1508 - Avoid infinite loop on unexpected controller input.
1509 - Don't log spurious warnings when we see a circuit close reason we
1510 don't recognize; it's probably just from a newer version of Tor.
1511 - Add Vidalia to the OS X uninstaller script, so when we uninstall
1512 Tor/Privoxy we also uninstall Vidalia.
1515 Changes in version 0.1.2.3-alpha - 2006-10-29
1517 - Prepare for servers to publish descriptors less often: never
1518 discard a descriptor simply for being too old until either it is
1519 recommended by no authorities, or until we get a better one for
1520 the same router. Make caches consider retaining old recommended
1521 routers for even longer.
1522 - If most authorities set a BadExit flag for a server, clients
1523 don't think of it as a general-purpose exit. Clients only consider
1524 authorities that advertise themselves as listing bad exits.
1525 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
1526 headers for content, so that we can work better in the presence of
1527 caching HTTP proxies.
1528 - Allow authorities to list nodes as bad exits by fingerprint or by
1531 o Minor features, controller:
1532 - Add a REASON field to CIRC events; for backward compatibility, this
1533 field is sent only to controllers that have enabled the extended
1534 event format. Also, add additional reason codes to explain why
1535 a given circuit has been destroyed or truncated. (Patches from
1537 - Add a REMOTE_REASON field to extended CIRC events to tell the
1538 controller about why a remote OR told us to close a circuit.
1539 - Stream events also now have REASON and REMOTE_REASON fields,
1540 working much like those for circuit events.
1541 - There's now a GETINFO ns/... field so that controllers can ask Tor
1542 about the current status of a router.
1543 - A new event type "NS" to inform a controller when our opinion of
1544 a router's status has changed.
1545 - Add a GETINFO events/names and GETINFO features/names so controllers
1546 can tell which events and features are supported.
1547 - A new CLEARDNSCACHE signal to allow controllers to clear the
1548 client-side DNS cache without expiring circuits.
1550 o Security bugfixes:
1551 - When the user sends a NEWNYM signal, clear the client-side DNS
1552 cache too. Otherwise we continue to act on previous information.
1555 - Avoid sending junk to controllers or segfaulting when a controller
1556 uses EVENT_NEW_DESC with verbose nicknames.
1557 - Stop triggering asserts if the controller tries to extend hidden
1558 service circuits (reported by mwenge).
1559 - Avoid infinite loop on unexpected controller input.
1560 - When the controller does a "GETINFO network-status", tell it
1561 about even those routers whose descriptors are very old, and use
1562 long nicknames where appropriate.
1563 - Change NT service functions to be loaded on demand. This lets us
1564 build with MinGW without breaking Tor for Windows 98 users.
1565 - Do DirPort reachability tests less often, since a single test
1566 chews through many circuits before giving up.
1567 - In the hidden service example in torrc.sample, stop recommending
1568 esoteric and discouraged hidden service options.
1569 - When stopping an NT service, wait up to 10 sec for it to actually
1570 stop. (Patch from Matt Edman; resolves bug 295.)
1571 - Fix handling of verbose nicknames with ORCONN controller events:
1572 make them show up exactly when requested, rather than exactly when
1574 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
1575 printing a duplicate "$" in the keys we send (reported by mwenge).
1576 - Correctly set maximum connection limit on Cygwin. (This time
1578 - Try to detect Windows correctly when cross-compiling.
1579 - Detect the size of the routers file correctly even if it is
1580 corrupted (on systems without mmap) or not page-aligned (on systems
1581 with mmap). This bug was harmless.
1582 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
1583 to open a stream fails; now we do in more cases. This should
1584 make clients able to find a good exit faster in some cases, since
1585 unhandleable requests will now get an error rather than timing out.
1586 - Resolve two memory leaks when rebuilding the on-disk router cache
1587 (reported by fookoowa).
1588 - Clean up minor code warnings suggested by the MIPSpro C compiler,
1589 and reported by some Centos users.
1590 - Controller signals now work on non-Unix platforms that don't define
1591 SIGUSR1 and SIGUSR2 the way we expect.
1592 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
1593 values before failing, and always enables eventdns.
1594 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
1595 Try to fix this in configure.in by checking for most functions
1596 before we check for libevent.
1599 Changes in version 0.1.2.2-alpha - 2006-10-07
1601 - Make our async eventdns library on-by-default for Tor servers,
1602 and plan to deprecate the separate dnsworker threads.
1603 - Add server-side support for "reverse" DNS lookups (using PTR
1604 records so clients can determine the canonical hostname for a given
1605 IPv4 address). Only supported by servers using eventdns; servers
1606 now announce in their descriptors whether they support eventdns.
1607 - Specify and implement client-side SOCKS5 interface for reverse DNS
1608 lookups (see doc/socks-extensions.txt).
1609 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
1610 connect to directory servers through Tor. Previously, clients needed
1611 to find Tor exits to make private connections to directory servers.
1612 - Avoid choosing Exit nodes for entry or middle hops when the
1613 total bandwidth available from non-Exit nodes is much higher than
1614 the total bandwidth available from Exit nodes.
1615 - Workaround for name servers (like Earthlink's) that hijack failing
1616 DNS requests and replace the no-such-server answer with a "helpful"
1617 redirect to an advertising-driven search portal. Also work around
1618 DNS hijackers who "helpfully" decline to hijack known-invalid
1619 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
1620 lets you turn it off.
1621 - Send out a burst of long-range padding cells once we've established
1622 that we're reachable. Spread them over 4 circuits, so hopefully
1623 a few will be fast. This exercises our bandwidth and bootstraps
1624 us into the directory more quickly.
1626 o New/improved config options:
1627 - Add new config option "ResolvConf" to let the server operator
1628 choose an alternate resolve.conf file when using eventdns.
1629 - Add an "EnforceDistinctSubnets" option to control our "exclude
1630 servers on the same /16" behavior. It's still on by default; this
1631 is mostly for people who want to operate private test networks with
1632 all the machines on the same subnet.
1633 - If one of our entry guards is on the ExcludeNodes list, or the
1634 directory authorities don't think it's a good guard, treat it as
1635 if it were unlisted: stop using it as a guard, and throw it off
1636 the guards list if it stays that way for a long time.
1637 - Allow directory authorities to be marked separately as authorities
1638 for the v1 directory protocol, the v2 directory protocol, and
1639 as hidden service directories, to make it easier to retire old
1640 authorities. V1 authorities should set "HSAuthoritativeDir 1"
1641 to continue being hidden service authorities too.
1642 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
1644 o Minor features, controller:
1645 - Fix CIRC controller events so that controllers can learn the
1646 identity digests of non-Named servers used in circuit paths.
1647 - Let controllers ask for more useful identifiers for servers. Instead
1648 of learning identity digests for un-Named servers and nicknames
1649 for Named servers, the new identifiers include digest, nickname,
1650 and indication of Named status. Off by default; see control-spec.txt
1651 for more information.
1652 - Add a "getinfo address" controller command so it can display Tor's
1653 best guess to the user.
1654 - New controller event to alert the controller when our server
1655 descriptor has changed.
1656 - Give more meaningful errors on controller authentication failure.
1658 o Minor features, other:
1659 - When asked to resolve a hostname, don't use non-exit servers unless
1660 requested to do so. This allows servers with broken DNS to be
1661 useful to the network.
1662 - Divide eventdns log messages into warn and info messages.
1663 - Reserve the nickname "Unnamed" for routers that can't pick
1664 a hostname: any router can call itself Unnamed; directory
1665 authorities will never allocate Unnamed to any particular router;
1666 clients won't believe that any router is the canonical Unnamed.
1667 - Only include function names in log messages for info/debug messages.
1668 For notice/warn/err, the content of the message should be clear on
1669 its own, and printing the function name only confuses users.
1670 - Avoid some false positives during reachability testing: don't try
1671 to test via a server that's on the same /24 as us.
1672 - If we fail to build a circuit to an intended enclave, and it's
1673 not mandatory that we use that enclave, stop wanting it.
1674 - When eventdns is enabled, allow multithreaded builds on NetBSD and
1675 OpenBSD. (We had previously disabled threads on these platforms
1676 because they didn't have working thread-safe resolver functions.)
1678 o Major bugfixes, anonymity/security:
1679 - If a client asked for a server by name, and there's a named server
1680 in our network-status but we don't have its descriptor yet, we
1681 could return an unnamed server instead.
1682 - Fix NetBSD bug that could allow someone to force uninitialized RAM
1683 to be sent to a server's DNS resolver. This only affects NetBSD
1684 and other platforms that do not bounds-check tolower().
1685 - Reject (most) attempts to use Tor circuits with length one. (If
1686 many people start using Tor as a one-hop proxy, exit nodes become
1687 a more attractive target for compromise.)
1688 - Just because your DirPort is open doesn't mean people should be
1689 able to remotely teach you about hidden service descriptors. Now
1690 only accept rendezvous posts if you've got HSAuthoritativeDir set.
1692 o Major bugfixes, other:
1693 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
1694 - When a client asks the server to resolve (not connect to)
1695 an address, and it has a cached answer, give them the cached answer.
1696 Previously, the server would give them no answer at all.
1697 - Allow really slow clients to not hang up five minutes into their
1698 directory downloads (suggested by Adam J. Richter).
1699 - We were building exactly the wrong circuits when we anticipated
1700 hidden service requirements, meaning Tor would have to build all
1701 its circuits on demand.
1702 - Avoid crashing when we mmap a router cache file of size 0.
1703 - When testing reachability of our DirPort, don't launch new
1704 tests when there's already one in progress -- unreachable
1705 servers were stacking up dozens of testing streams.
1707 o Minor bugfixes, correctness:
1708 - If we're a directory mirror and we ask for "all" network status
1709 documents, we would discard status documents from authorities
1711 - Avoid a memory corruption bug when creating a hash table for
1713 - Avoid controller-triggered crash when misusing certain commands
1714 from a v0 controller on platforms that do not handle
1715 printf("%s",NULL) gracefully.
1716 - Don't crash when a controller sends a third argument to an
1717 "extendcircuit" request.
1718 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
1719 response; fix error code when "getinfo dir/status/" fails.
1720 - Avoid crash when telling controller stream-status and a stream
1722 - Patch from Adam Langley to fix assert() in eventdns.c.
1723 - Fix a debug log message in eventdns to say "X resolved to Y"
1724 instead of "X resolved to X".
1725 - Make eventdns give strings for DNS errors, not just error numbers.
1726 - Track unreachable entry guards correctly: don't conflate
1727 'unreachable by us right now' with 'listed as down by the directory
1728 authorities'. With the old code, if a guard was unreachable by
1729 us but listed as running, it would clog our guard list forever.
1730 - Behave correctly in case we ever have a network with more than
1731 2GB/s total advertised capacity.
1732 - Make TrackExitHosts case-insensitive, and fix the behavior of
1733 ".suffix" TrackExitHosts items to avoid matching in the middle of
1735 - Finally fix the openssl warnings from newer gccs that believe that
1736 ignoring a return value is okay, but casting a return value and
1737 then ignoring it is a sign of madness.
1738 - Prevent the contrib/exitlist script from printing the same
1739 result more than once.
1740 - Patch from Steve Hildrey: Generate network status correctly on
1741 non-versioning dirservers.
1742 - Don't listen to the X-Your-Address-Is hint if you did the lookup
1743 via Tor; otherwise you'll think you're the exit node's IP address.
1745 o Minor bugfixes, performance:
1746 - Two small performance improvements on parsing descriptors.
1747 - Major performance improvement on inserting descriptors: change
1748 algorithm from O(n^2) to O(n).
1749 - Make the common memory allocation path faster on machines where
1750 malloc(0) returns a pointer.
1751 - Start remembering X-Your-Address-Is directory hints even if you're
1752 a client, so you can become a server more smoothly.
1753 - Avoid duplicate entries on MyFamily line in server descriptor.
1755 o Packaging, features:
1756 - Remove architecture from OS X builds. The official builds are
1757 now universal binaries.
1758 - The Debian package now uses --verify-config when (re)starting,
1759 to distinguish configuration errors from other errors.
1760 - Update RPMs to require libevent 1.1b.
1762 o Packaging, bugfixes:
1763 - Patches so Tor builds with MinGW on Windows.
1764 - Patches so Tor might run on Cygwin again.
1765 - Resume building on non-gcc compilers and ancient gcc. Resume
1766 building with the -O0 compile flag. Resume building cleanly on
1768 - Run correctly on OS X platforms with case-sensitive filesystems.
1769 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
1770 - Add autoconf checks so Tor can build on Solaris x86 again.
1773 - Documented (and renamed) ServerDNSSearchDomains and
1774 ServerDNSResolvConfFile options.
1775 - Be clearer that the *ListenAddress directives can be repeated
1779 Changes in version 0.1.1.24 - 2006-09-29
1781 - Allow really slow clients to not hang up five minutes into their
1782 directory downloads (suggested by Adam J. Richter).
1783 - Fix major performance regression from 0.1.0.x: instead of checking
1784 whether we have enough directory information every time we want to
1785 do something, only check when the directory information has changed.
1786 This should improve client CPU usage by 25-50%.
1787 - Don't crash if, after a server has been running for a while,
1788 it can't resolve its hostname.
1791 - Allow Tor to start when RunAsDaemon is set but no logs are set.
1792 - Don't crash when the controller receives a third argument to an
1793 "extendcircuit" request.
1794 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
1795 response; fix error code when "getinfo dir/status/" fails.
1796 - Fix configure.in to not produce broken configure files with
1797 more recent versions of autoconf. Thanks to Clint for his auto*
1799 - Fix security bug on NetBSD that could allow someone to force
1800 uninitialized RAM to be sent to a server's DNS resolver. This
1801 only affects NetBSD and other platforms that do not bounds-check
1803 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
1804 methods: these are known to be buggy.
1805 - If we're a directory mirror and we ask for "all" network status
1806 documents, we would discard status documents from authorities
1810 Changes in version 0.1.2.1-alpha - 2006-08-27
1812 - Add "eventdns" async dns library from Adam Langley, tweaked to
1813 build on OSX and Windows. Only enabled if you pass the
1814 --enable-eventdns argument to configure.
1815 - Allow servers with no hostname or IP address to learn their
1816 IP address by asking the directory authorities. This code only
1817 kicks in when you would normally have exited with a "no address"
1818 error. Nothing's authenticated, so use with care.
1819 - Rather than waiting a fixed amount of time between retrying
1820 application connections, we wait only 5 seconds for the first,
1821 10 seconds for the second, and 15 seconds for each retry after
1822 that. Hopefully this will improve the expected user experience.
1823 - Patch from Tup to add support for transparent AP connections:
1824 this basically bundles the functionality of trans-proxy-tor
1825 into the Tor mainline. Now hosts with compliant pf/netfilter
1826 implementations can redirect TCP connections straight to Tor
1827 without diverting through SOCKS. Needs docs.
1828 - Busy directory servers save lots of memory by spooling server
1829 descriptors, v1 directories, and v2 networkstatus docs to buffers
1830 as needed rather than en masse. Also mmap the cached-routers
1831 files, so we don't need to keep the whole thing in memory too.
1832 - Automatically avoid picking more than one node from the same
1833 /16 network when constructing a circuit.
1834 - Revise and clean up the torrc.sample that we ship with; add
1835 a section for BandwidthRate and BandwidthBurst.
1838 - Split circuit_t into origin_circuit_t and or_circuit_t, and
1839 split connection_t into edge, or, dir, control, and base structs.
1840 These will save quite a bit of memory on busy servers, and they'll
1841 also help us track down bugs in the code and bugs in the spec.
1842 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
1843 or later. Log when we are doing this, so we can diagnose it when
1844 it fails. (Also, recommend libevent 1.1b for kqueue and
1845 win32 methods; deprecate libevent 1.0b harder; make libevent
1846 recommendation system saner.)
1847 - Start being able to build universal binaries on OS X (thanks
1849 - Export the default exit policy via the control port, so controllers
1850 don't need to guess what it is / will be later.
1851 - Add a man page entry for ProtocolWarnings.
1852 - Add TestVia config option to the man page.
1853 - Remove even more protocol-related warnings from Tor server logs,
1854 such as bad TLS handshakes and malformed begin cells.
1855 - Stop fetching descriptors if you're not a dir mirror and you
1856 haven't tried to establish any circuits lately. [This currently
1857 causes some dangerous behavior, because when you start up again
1858 you'll use your ancient server descriptors.]
1859 - New DirPort behavior: if you have your dirport set, you download
1860 descriptors aggressively like a directory mirror, whether or not
1862 - Get rid of the router_retry_connections notion. Now routers
1863 no longer try to rebuild long-term connections to directory
1864 authorities, and directory authorities no longer try to rebuild
1865 long-term connections to all servers. We still don't hang up
1866 connections in these two cases though -- we need to look at it
1867 more carefully to avoid flapping, and we likely need to wait til
1868 0.1.1.x is obsolete.
1869 - Drop compatibility with obsolete Tors that permit create cells
1870 to have the wrong circ_id_type.
1871 - Re-enable per-connection rate limiting. Get rid of the "OP
1872 bandwidth" concept. Lay groundwork for "bandwidth classes" --
1873 separate global buckets that apply depending on what sort of conn
1875 - Start publishing one minute or so after we find our ORPort
1876 to be reachable. This will help reduce the number of descriptors
1877 we have for ourselves floating around, since it's quite likely
1878 other things (e.g. DirPort) will change during that minute too.
1879 - Fork the v1 directory protocol into its own spec document,
1880 and mark dir-spec.txt as the currently correct (v2) spec.
1883 - When we find our DirPort to be reachable, publish a new descriptor
1884 so we'll tell the world (reported by pnx).
1885 - Publish a new descriptor after we hup/reload. This is important
1886 if our config has changed such that we'll want to start advertising
1887 our DirPort now, etc.
1888 - Allow Tor to start when RunAsDaemon is set but no logs are set.
1889 - When we have a state file we cannot parse, tell the user and
1890 move it aside. Now we avoid situations where the user starts
1891 Tor in 1904, Tor writes a state file with that timestamp in it,
1892 the user fixes her clock, and Tor refuses to start.
1893 - Fix configure.in to not produce broken configure files with
1894 more recent versions of autoconf. Thanks to Clint for his auto*
1896 - "tor --verify-config" now exits with -1(255) or 0 depending on
1897 whether the config options are bad or good.
1898 - Resolve bug 321 when using dnsworkers: append a period to every
1899 address we resolve at the exit node, so that we do not accidentally
1900 pick up local addresses, and so that failing searches are retried
1901 in the resolver search domains. (This is already solved for
1902 eventdns.) (This breaks Blossom servers for now.)
1903 - If we are using an exit enclave and we can't connect, e.g. because
1904 its webserver is misconfigured to not listen on localhost, then
1905 back off and try connecting from somewhere else before we fail.
1908 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
1909 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
1910 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
1911 when the IP address is mapped through MapAddress to a hostname.
1912 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
1913 useless IPv6 DNS resolves.
1914 - Patch suggested by Karsten Loesing: respond to SIGNAL command
1915 before we execute the signal, in case the signal shuts us down.
1916 - Clean up AllowInvalidNodes man page entry.
1917 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
1918 - Add more asserts to track down an assert error on a windows Tor
1919 server with connection_add being called with socket == -1.
1920 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
1921 - Fix misleading log messages: an entry guard that is "unlisted",
1922 as well as not known to be "down" (because we've never heard
1923 of it), is not therefore "up".
1924 - Remove code to special-case "-cvs" ending, since it has not
1925 actually mattered since 0.0.9.
1926 - Make our socks5 handling more robust to broken socks clients:
1927 throw out everything waiting on the buffer in between socks
1928 handshake phases, since they can't possibly (so the theory
1929 goes) have predicted what we plan to respond to them.
1932 Changes in version 0.1.1.23 - 2006-07-30
1934 - Fast Tor servers, especially exit nodes, were triggering asserts
1935 due to a bug in handling the list of pending DNS resolves. Some
1936 bugs still remain here; we're hunting them.
1937 - Entry guards could crash clients by sending unexpected input.
1938 - More fixes on reachability testing: if you find yourself reachable,
1939 then don't ever make any client requests (so you stop predicting
1940 circuits), then hup or have your clock jump, then later your IP
1941 changes, you won't think circuits are working, so you won't try to
1942 test reachability, so you won't publish.
1945 - Avoid a crash if the controller does a resetconf firewallports
1946 and then a setconf fascistfirewall=1.
1947 - Avoid an integer underflow when the dir authority decides whether
1948 a router is stable: we might wrongly label it stable, and compute
1949 a slightly wrong median stability, when a descriptor is published
1951 - Fix a place where we might trigger an assert if we can't build our
1952 own server descriptor yet.
1955 Changes in version 0.1.1.22 - 2006-07-05
1957 - Fix a big bug that was causing servers to not find themselves
1958 reachable if they changed IP addresses. Since only 0.1.1.22+
1959 servers can do reachability testing correctly, now we automatically
1960 make sure to test via one of these.
1961 - Fix to allow clients and mirrors to learn directory info from
1962 descriptor downloads that get cut off partway through.
1963 - Directory authorities had a bug in deciding if a newly published
1964 descriptor was novel enough to make everybody want a copy -- a few
1965 servers seem to be publishing new descriptors many times a minute.
1967 - Fix a rare bug that was causing some servers to complain about
1968 "closing wedged cpuworkers" and skip some circuit create requests.
1969 - Make the Exit flag in directory status documents actually work.
1972 Changes in version 0.1.1.21 - 2006-06-10
1973 o Crash and assert fixes from 0.1.1.20:
1974 - Fix a rare crash on Tor servers that have enabled hibernation.
1975 - Fix a seg fault on startup for Tor networks that use only one
1976 directory authority.
1977 - Fix an assert from a race condition that occurs on Tor servers
1978 while exiting, where various threads are trying to log that they're
1979 exiting, and delete the logs, at the same time.
1980 - Make our unit tests pass again on certain obscure platforms.
1983 - Add support for building SUSE RPM packages.
1984 - Speed up initial bootstrapping for clients: if we are making our
1985 first ever connection to any entry guard, then don't mark it down
1987 - When only one Tor server in the network is labelled as a guard,
1988 and we've already picked him, we would cycle endlessly picking him
1989 again, being unhappy about it, etc. Now we specifically exclude
1990 current guards when picking a new guard.
1991 - Servers send create cells more reliably after the TLS connection
1992 is established: we were sometimes forgetting to send half of them
1993 when we had more than one pending.
1994 - If we get a create cell that asks us to extend somewhere, but the
1995 Tor server there doesn't match the expected digest, we now send
1996 a destroy cell back, rather than silently doing nothing.
1997 - Make options->RedirectExit work again.
1998 - Make cookie authentication for the controller work again.
1999 - Stop being picky about unusual characters in the arguments to
2000 mapaddress. It's none of our business.
2001 - Add a new config option "TestVia" that lets you specify preferred
2002 middle hops to use for test circuits. Perhaps this will let me
2003 debug the reachability problems better.
2005 o Log / documentation fixes:
2006 - If we're a server and some peer has a broken TLS certificate, don't
2007 log about it unless ProtocolWarnings is set, i.e., we want to hear
2008 about protocol violations by others.
2009 - Fix spelling of VirtualAddrNetwork in man page.
2010 - Add a better explanation at the top of the autogenerated torrc file
2011 about what happened to our old torrc.
2014 Changes in version 0.1.1.20 - 2006-05-23
2016 - Downgrade a log severity where servers complain that they're
2018 - Avoid a compile warning on FreeBSD.
2019 - Remove string size limit on NEWDESC messages; solve bug 291.
2020 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
2021 more thoroughly when we're running on windows.
2024 Changes in version 0.1.1.19-rc - 2006-05-03
2026 - Regenerate our local descriptor if it's dirty and we try to use
2027 it locally (e.g. if it changes during reachability detection).
2028 - If we setconf our ORPort to 0, we continued to listen on the
2029 old ORPort and receive connections.
2030 - Avoid a second warning about machine/limits.h on Debian
2032 - Be willing to add our own routerinfo into the routerlist.
2033 Now authorities will include themselves in their directories
2034 and network-statuses.
2035 - Stop trying to upload rendezvous descriptors to every
2036 directory authority: only try the v1 authorities.
2037 - Servers no longer complain when they think they're not
2038 registered with the directory authorities. There were too many
2040 - Backport dist-rpm changes so rpms can be built without errors.
2043 - Implement an option, VirtualAddrMask, to set which addresses
2044 get handed out in response to mapaddress requests. This works
2045 around a bug in tsocks where 127.0.0.0/8 is never socksified.
2048 Changes in version 0.1.1.18-rc - 2006-04-10
2050 - Work harder to download live network-statuses from all the
2051 directory authorities we know about. Improve the threshold
2052 decision logic so we're more robust to edge cases.
2053 - When fetching rendezvous descriptors, we were willing to ask
2054 v2 authorities too, which would always return 404.
2057 - Stop listing down or invalid nodes in the v1 directory. This will
2058 reduce its bulk by about 1/3, and reduce load on directory
2060 - When deciding whether a router is Fast or Guard-worthy, consider
2061 his advertised BandwidthRate and not just the BandwidthCapacity.
2062 - No longer ship INSTALL and README files -- they are useless now.
2063 - Force rpmbuild to behave and honor target_cpu.
2064 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
2065 - Start to include translated versions of the tor-doc-*.html
2066 files, along with the screenshots. Still needs more work.
2067 - Start sending back 512 and 451 errors if mapaddress fails,
2068 rather than not sending anything back at all.
2069 - When we fail to bind or listen on an incoming or outgoing
2070 socket, we should close it before failing. otherwise we just
2071 leak it. (thanks to weasel for finding.)
2072 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
2073 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
2074 - Make NoPublish (even though deprecated) work again.
2075 - Fix a minor security flaw where a versioning auth dirserver
2076 could list a recommended version many times in a row to make
2077 clients more convinced that it's recommended.
2078 - Fix crash bug if there are two unregistered servers running
2079 with the same nickname, one of them is down, and you ask for
2080 them by nickname in your EntryNodes or ExitNodes. Also, try
2081 to pick the one that's running rather than an arbitrary one.
2082 - Fix an infinite loop we could hit if we go offline for too long.
2083 - Complain when we hit WSAENOBUFS on recv() or write() too.
2084 Perhaps this will help us hunt the bug.
2085 - If you're not a versioning dirserver, don't put the string
2086 "client-versions \nserver-versions \n" in your network-status.
2087 - Lower the minimum required number of file descriptors to 1000,
2088 so we can have some overhead for Valgrind on Linux, where the
2089 default ulimit -n is 1024.
2092 - Add tor.dizum.com as the fifth authoritative directory server.
2093 - Add a new config option FetchUselessDescriptors, off by default,
2094 for when you plan to run "exitlist" on your client and you want
2095 to know about even the non-running descriptors.
2098 Changes in version 0.1.1.17-rc - 2006-03-28
2100 - Clients and servers since 0.1.1.10-alpha have been expiring
2101 connections whenever they are idle for 5 minutes and they *do*
2102 have circuits on them. Oops. With this new version, clients will
2103 discard their previous entry guard choices and avoid choosing
2104 entry guards running these flawed versions.
2105 - Fix memory leak when uncompressing concatenated zlib streams. This
2106 was causing substantial leaks over time on Tor servers.
2107 - The v1 directory was including servers as much as 48 hours old,
2108 because that's how the new routerlist->routers works. Now only
2109 include them if they're 20 hours old or less.
2112 - Resume building on irix64, netbsd 2.0, etc.
2113 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
2115 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
2116 and it is confusing some users.
2117 - Mirrors stop caching the v1 directory so often.
2118 - Make the max number of old descriptors that a cache will hold
2119 rise with the number of directory authorities, so we can scale.
2120 - Change our win32 uname() hack to be more forgiving about what
2121 win32 versions it thinks it's found.
2124 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
2126 - When the controller's *setconf commands fail, collect an error
2127 message in a string and hand it back to the controller.
2128 - Make the v2 dir's "Fast" flag based on relative capacity, just
2129 like "Stable" is based on median uptime. Name everything in the
2130 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
2131 - Log server fingerprint on startup, so new server operators don't
2132 have to go hunting around their filesystem for it.
2133 - Return a robots.txt on our dirport to discourage google indexing.
2134 - Let the controller ask for GETINFO dir/status/foo so it can ask
2135 directly rather than connecting to the dir port. Only works when
2136 dirport is set for now.
2138 o New config options rather than constants in the code:
2139 - SocksTimeout: How long do we let a socks connection wait
2140 unattached before we fail it?
2141 - CircuitBuildTimeout: Cull non-open circuits that were born
2142 at least this many seconds ago.
2143 - CircuitIdleTimeout: Cull open clean circuits that were born
2144 at least this many seconds ago.
2147 Changes in version 0.1.1.16-rc - 2006-03-18
2148 o Bugfixes on 0.1.1.15-rc:
2149 - Fix assert when the controller asks to attachstream a connect-wait
2150 or resolve-wait stream.
2151 - Now do address rewriting when the controller asks us to attach
2152 to a particular circuit too. This will let Blossom specify
2153 "moria2.exit" without having to learn what moria2's IP address is.
2154 - Make the "tor --verify-config" command-line work again, so people
2155 can automatically check if their torrc will parse.
2156 - Authoritative dirservers no longer require an open connection from
2157 a server to consider him "reachable". We need this change because
2158 when we add new auth dirservers, old servers won't know not to
2160 - Let Tor build on Sun CC again.
2161 - Fix an off-by-one buffer size in dirserv.c that magically never
2162 hit our three authorities but broke sjmurdoch's own tor network.
2163 - If we as a directory mirror don't know of any v1 directory
2164 authorities, then don't try to cache any v1 directories.
2165 - Stop warning about unknown servers in our family when they are
2166 given as hex digests.
2167 - Stop complaining as quickly to the server operator that he
2168 hasn't registered his nickname/key binding.
2169 - Various cleanups so we can add new V2 Auth Dirservers.
2170 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
2171 reflect the updated flags in our v2 dir protocol.
2172 - Resume allowing non-printable characters for exit streams (both
2173 for connecting and for resolving). Now we tolerate applications
2174 that don't follow the RFCs. But continue to block malformed names
2177 o Bugfixes on 0.1.0.x:
2178 - Fix assert bug in close_logs(): when we close and delete logs,
2179 remove them all from the global "logfiles" list.
2180 - Fix minor integer overflow in calculating when we expect to use up
2181 our bandwidth allocation before hibernating.
2182 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
2183 there are multiple SSLs installed with different versions.
2184 - When we try to be a server and Address is not explicitly set and
2185 our hostname resolves to a private IP address, try to use an
2186 interface address if it has a public address. Now Windows machines
2187 that think of themselves as localhost can work by default.
2190 - Let the controller ask for GETINFO dir/server/foo so it can ask
2191 directly rather than connecting to the dir port.
2192 - Let the controller tell us about certain router descriptors
2193 that it doesn't want Tor to use in circuits. Implement
2194 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
2195 - New config option SafeSocks to reject all application connections
2196 using unsafe socks protocols. Defaults to off.
2199 Changes in version 0.1.1.15-rc - 2006-03-11
2200 o Bugfixes and cleanups:
2201 - When we're printing strings from the network, don't try to print
2202 non-printable characters. This protects us against shell escape
2203 sequence exploits, and also against attacks to fool humans into
2204 misreading their logs.
2205 - Fix a bug where Tor would fail to establish any connections if you
2206 left it off for 24 hours and then started it: we were happy with
2207 the obsolete network statuses, but they all referred to router
2208 descriptors that were too old to fetch, so we ended up with no
2209 valid router descriptors.
2210 - Fix a seg fault in the controller's "getinfo orconn-status"
2211 command while listing status on incoming handshaking connections.
2212 Introduce a status name "NEW" for these connections.
2213 - If we get a linelist or linelist_s config option from the torrc
2214 (e.g. ExitPolicy) and it has no value, warn and skip rather than
2215 silently resetting it to its default.
2216 - Don't abandon entry guards until they've been down or gone for
2218 - Cleaner and quieter log messages.
2221 - New controller signal NEWNYM that makes new application requests
2223 - Add a new circuit purpose 'controller' to let the controller ask
2224 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
2225 controller command to let you specify the purpose if you're
2226 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
2227 command to let you change a circuit's purpose after it's been
2229 - Accept "private:*" in routerdesc exit policies; not generated yet
2230 because older Tors do not understand it.
2231 - Add BSD-style contributed startup script "rc.subr" from Peter
2235 Changes in version 0.1.1.14-alpha - 2006-02-20
2236 o Bugfixes on 0.1.1.x:
2237 - Don't die if we ask for a stdout or stderr log (even implicitly)
2238 and we're set to RunAsDaemon -- just warn.
2239 - We still had a few bugs in the OR connection rotation code that
2240 caused directory servers to slowly aggregate connections to other
2241 fast Tor servers. This time for sure!
2242 - Make log entries on Win32 include the name of the function again.
2243 - We were treating a pair of exit policies if they were equal even
2244 if one said accept and the other said reject -- causing us to
2245 not always publish a new descriptor since we thought nothing
2247 - Retry pending server downloads as well as pending networkstatus
2248 downloads when we unexpectedly get a socks request.
2249 - We were ignoring the IS_FAST flag in the directory status,
2250 meaning we were willing to pick trivial-bandwidth nodes for "fast"
2252 - If the controller's SAVECONF command fails (e.g. due to file
2253 permissions), let the controller know that it failed.
2256 - If we're trying to be a Tor server and running Windows 95/98/ME
2257 as a server, explain that we'll likely crash.
2258 - When we're a server, a client asks for an old-style directory,
2259 and our write bucket is empty, don't give it to him. This way
2260 small servers can continue to serve the directory *sometimes*,
2261 without getting overloaded.
2262 - Compress exit policies even more -- look for duplicate lines
2264 - Clients now honor the "guard" flag in the router status when
2265 picking entry guards, rather than looking at is_fast or is_stable.
2266 - Retain unrecognized lines in $DATADIR/state file, so that we can
2267 be forward-compatible.
2268 - Generate 18.0.0.0/8 address policy format in descs when we can;
2269 warn when the mask is not reducible to a bit-prefix.
2270 - Let the user set ControlListenAddress in the torrc. This can be
2271 dangerous, but there are some cases (like a secured LAN) where it
2273 - Split ReachableAddresses into ReachableDirAddresses and
2274 ReachableORAddresses, so we can restrict Dir conns to port 80
2275 and OR conns to port 443.
2276 - Now we can target arch and OS in rpm builds (contributed by
2277 Phobos). Also make the resulting dist-rpm filename match the
2279 - New config options to help controllers: FetchServerDescriptors
2280 and FetchHidServDescriptors for whether to fetch server
2281 info and hidserv info or let the controller do it, and
2282 PublishServerDescriptor and PublishHidServDescriptors.
2283 - Also let the controller set the __AllDirActionsPrivate config
2284 option if you want all directory fetches/publishes to happen via
2285 Tor (it assumes your controller bootstraps your circuits).
2288 Changes in version 0.1.0.17 - 2006-02-17
2289 o Crash bugfixes on 0.1.0.x:
2290 - When servers with a non-zero DirPort came out of hibernation,
2291 sometimes they would trigger an assert.
2293 o Other important bugfixes:
2294 - On platforms that don't have getrlimit (like Windows), we were
2295 artificially constraining ourselves to a max of 1024
2296 connections. Now just assume that we can handle as many as 15000
2297 connections. Hopefully this won't cause other problems.
2299 o Backported features:
2300 - When we're a server, a client asks for an old-style directory,
2301 and our write bucket is empty, don't give it to him. This way
2302 small servers can continue to serve the directory *sometimes*,
2303 without getting overloaded.
2304 - Whenever you get a 503 in response to a directory fetch, try
2305 once more. This will become important once servers start sending
2306 503's whenever they feel busy.
2307 - Fetch a new directory every 120 minutes, not every 40 minutes.
2308 Now that we have hundreds of thousands of users running the old
2309 directory algorithm, it's starting to hurt a lot.
2310 - Bump up the period for forcing a hidden service descriptor upload
2311 from 20 minutes to 1 hour.
2314 Changes in version 0.1.1.13-alpha - 2006-02-09
2315 o Crashes in 0.1.1.x:
2316 - When you tried to setconf ORPort via the controller, Tor would
2317 crash. So people using TorCP to become a server were sad.
2318 - Solve (I hope) the stack-smashing bug that we were seeing on fast
2319 servers. The problem appears to be something do with OpenSSL's
2320 random number generation, or how we call it, or something. Let me
2321 know if the crashes continue.
2322 - Turn crypto hardware acceleration off by default, until we find
2323 somebody smart who can test it for us. (It appears to produce
2324 seg faults in at least some cases.)
2325 - Fix a rare assert error when we've tried all intro points for
2326 a hidden service and we try fetching the service descriptor again:
2327 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
2330 - Fix a major load balance bug: we were round-robining in 16 KB
2331 chunks, and servers with bandwidthrate of 20 KB, while downloading
2332 a 600 KB directory, would starve their other connections. Now we
2333 try to be a bit more fair.
2334 - Dir authorities and mirrors were never expiring the newest
2335 descriptor for each server, causing memory and directory bloat.
2336 - Fix memory-bloating and connection-bloating bug on servers: We
2337 were never closing any connection that had ever had a circuit on
2338 it, because we were checking conn->n_circuits == 0, yet we had a
2339 bug that let it go negative.
2340 - Make Tor work using squid as your http proxy again -- squid
2341 returns an error if you ask for a URL that's too long, and it uses
2342 a really generic error message. Plus, many people are behind a
2343 transparent squid so they don't even realize it.
2344 - On platforms that don't have getrlimit (like Windows), we were
2345 artificially constraining ourselves to a max of 1024
2346 connections. Now just assume that we can handle as many as 15000
2347 connections. Hopefully this won't cause other problems.
2348 - Add a new config option ExitPolicyRejectPrivate which defaults to
2349 1. This means all exit policies will begin with rejecting private
2350 addresses, unless the server operator explicitly turns it off.
2353 - Clients not longer download descriptors for non-running
2355 - Before we add new directory authorities, we should make it
2356 clear that only v1 authorities should receive/publish hidden
2357 service descriptors.
2360 - As soon as we've fetched some more directory info, immediately
2361 try to download more server descriptors. This way we don't have
2362 a 10 second pause during initial bootstrapping.
2363 - Remove even more loud log messages that the server operator can't
2365 - When we're running an obsolete or un-recommended version, make
2366 the log message more clear about what the problem is and what
2367 versions *are* still recommended.
2368 - Provide a more useful warn message when our onion queue gets full:
2369 the CPU is too slow or the exit policy is too liberal.
2370 - Don't warn when we receive a 503 from a dirserver/cache -- this
2371 will pave the way for them being able to refuse if they're busy.
2372 - When we fail to bind a listener, try to provide a more useful
2373 log message: e.g., "Is Tor already running?"
2374 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
2375 Goldberg can prove things about our handshake protocol more
2377 - MaxConn has been obsolete for a while now. Document the ConnLimit
2378 config option, which is a *minimum* number of file descriptors
2379 that must be available else Tor refuses to start.
2380 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
2381 if you log to syslog and want something other than LOG_DAEMON.
2382 - Make dirservers generate a separate "guard" flag to mean,
2383 "would make a good entry guard". Make clients parse it and vote
2384 on it. Not used by clients yet.
2385 - Implement --with-libevent-dir option to ./configure. Also, improve
2386 search techniques to find libevent, and use those for openssl too.
2387 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
2388 - Only start testing reachability once we've established a
2389 circuit. This will make startup on dirservers less noisy.
2390 - Don't try to upload hidden service descriptors until we have
2391 established a circuit.
2392 - Fix the controller's "attachstream 0" command to treat conn like
2393 it just connected, doing address remapping, handling .exit and
2394 .onion idioms, and so on. Now we're more uniform in making sure
2395 that the controller hears about new and closing connections.
2398 Changes in version 0.1.1.12-alpha - 2006-01-11
2399 o Bugfixes on 0.1.1.x:
2400 - The fix to close duplicate server connections was closing all
2401 Tor client connections if they didn't establish a circuit
2402 quickly enough. Oops.
2403 - Fix minor memory issue (double-free) that happened on exit.
2405 o Bugfixes on 0.1.0.x:
2406 - Tor didn't warn when it failed to open a log file.
2409 Changes in version 0.1.1.11-alpha - 2006-01-10
2410 o Crashes in 0.1.1.x:
2411 - Include all the assert/crash fixes from 0.1.0.16.
2412 - If you start Tor and then quit very quickly, there were some
2413 races that tried to free things that weren't allocated yet.
2414 - Fix a rare memory stomp if you're running hidden services.
2415 - Fix segfault when specifying DirServer in config without nickname.
2416 - Fix a seg fault when you finish connecting to a server but at
2417 that moment you dump his server descriptor.
2418 - Extendcircuit and Attachstream controller commands would
2419 assert/crash if you don't give them enough arguments.
2420 - Fix an assert error when we're out of space in the connection_list
2421 and we try to post a hidden service descriptor (reported by weasel).
2422 - If you specify a relative torrc path and you set RunAsDaemon in
2423 your torrc, then it chdir()'s to the new directory. If you HUP,
2424 it tries to load the new torrc location, fails, and exits.
2425 The fix: no longer allow a relative path to torrc using -f.
2428 - Implement "entry guards": automatically choose a handful of entry
2429 nodes and stick with them for all circuits. Only pick new guards
2430 when the ones you have are unsuitable, and if the old guards
2431 become suitable again, switch back. This will increase security
2432 dramatically against certain end-point attacks. The EntryNodes
2433 config option now provides some hints about which entry guards you
2434 want to use most; and StrictEntryNodes means to only use those.
2435 - New directory logic: download by descriptor digest, not by
2436 fingerprint. Caches try to download all listed digests from
2437 authorities; clients try to download "best" digests from caches.
2438 This avoids partitioning and isolating attacks better.
2439 - Make the "stable" router flag in network-status be the median of
2440 the uptimes of running valid servers, and make clients pay
2441 attention to the network-status flags. Thus the cutoff adapts
2442 to the stability of the network as a whole, making IRC, IM, etc
2443 connections more reliable.
2446 - Tor servers with dynamic IP addresses were needing to wait 18
2447 hours before they could start doing reachability testing using
2448 the new IP address and ports. This is because they were using
2449 the internal descriptor to learn what to test, yet they were only
2450 rebuilding the descriptor once they decided they were reachable.
2451 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
2452 to download certain server descriptors, throw them away, and then
2453 fetch them again after 30 minutes. Now mirrors throw away these
2454 server descriptors so clients can't get them.
2455 - We were leaving duplicate connections to other ORs open for a week,
2456 rather than closing them once we detect a duplicate. This only
2457 really affected authdirservers, but it affected them a lot.
2458 - Spread the authdirservers' reachability testing over the entire
2459 testing interval, so we don't try to do 500 TLS's at once every
2463 - If the network is down, and we try to connect to a conn because
2464 we have a circuit in mind, and we timeout (30 seconds) because the
2465 network never answers, we were expiring the circuit, but we weren't
2466 obsoleting the connection or telling the entry_guards functions.
2467 - Some Tor servers process billions of cells per day. These statistics
2468 need to be uint64_t's.
2469 - Check for integer overflows in more places, when adding elements
2470 to smartlists. This could possibly prevent a buffer overflow
2471 on malicious huge inputs. I don't see any, but I haven't looked
2473 - ReachableAddresses kept growing new "reject *:*" lines on every
2475 - When you "setconf log" via the controller, it should remove all
2476 logs. We were automatically adding back in a "log notice stdout".
2477 - Newly bootstrapped Tor networks couldn't establish hidden service
2478 circuits until they had nodes with high uptime. Be more tolerant.
2479 - We were marking servers down when they could not answer every piece
2480 of the directory request we sent them. This was far too harsh.
2481 - Fix the torify (tsocks) config file to not use Tor for localhost
2483 - Directory authorities now go to the proper authority when asking for
2484 a networkstatus, even when they want a compressed one.
2485 - Fix a harmless bug that was causing Tor servers to log
2486 "Got an end because of misc error, but we're not an AP. Closing."
2487 - Authorities were treating their own descriptor changes as cosmetic,
2488 meaning the descriptor available in the network-status and the
2489 descriptor that clients downloaded were different.
2490 - The OS X installer was adding a symlink for tor_resolve but
2491 the binary was called tor-resolve (reported by Thomas Hardly).
2492 - Workaround a problem with some http proxies where they refuse GET
2493 requests that specify "Content-Length: 0" (reported by Adrian).
2494 - Fix wrong log message when you add a "HiddenServiceNodes" config
2495 line without any HiddenServiceDir line (reported by Chris Thomas).
2498 - Write the TorVersion into the state file so we have a prayer of
2499 keeping forward and backward compatibility.
2500 - Revive the FascistFirewall config option rather than eliminating it:
2501 now it's a synonym for ReachableAddresses *:80,*:443.
2502 - Clients choose directory servers from the network status lists,
2503 not from their internal list of router descriptors. Now they can
2504 go to caches directly rather than needing to go to authorities
2506 - Directory authorities ignore router descriptors that have only
2507 cosmetic differences: do this for 0.1.0.x servers now too.
2508 - Add a new flag to network-status indicating whether the server
2509 can answer v2 directory requests too.
2510 - Authdirs now stop whining so loudly about bad descriptors that
2511 they fetch from other dirservers. So when there's a log complaint,
2512 it's for sure from a freshly uploaded descriptor.
2513 - Reduce memory requirements in our structs by changing the order
2515 - There used to be two ways to specify your listening ports in a
2516 server descriptor: on the "router" line and with a separate "ports"
2517 line. Remove support for the "ports" line.
2518 - New config option "AuthDirRejectUnlisted" for auth dirservers as
2519 a panic button: if we get flooded with unusable servers we can
2520 revert to only listing servers in the approved-routers file.
2521 - Auth dir servers can now mark a fingerprint as "!reject" or
2522 "!invalid" in the approved-routers file (as its nickname), to
2523 refuse descriptors outright or include them but marked as invalid.
2524 - Servers store bandwidth history across restarts/crashes.
2525 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
2526 get a better idea of why their circuits failed. Not used yet.
2527 - Directory mirrors now cache up to 16 unrecognized network-status
2528 docs. Now we can add new authdirservers and they'll be cached too.
2529 - When picking a random directory, prefer non-authorities if any
2531 - New controller option "getinfo desc/all-recent" to fetch the
2532 latest server descriptor for every router that Tor knows about.
2535 Changes in version 0.1.0.16 - 2006-01-02
2536 o Crash bugfixes on 0.1.0.x:
2537 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
2538 corrupting the heap, losing FDs, or crashing when we need to resize
2539 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
2540 - It turns out sparc64 platforms crash on unaligned memory access
2541 too -- so detect and avoid this.
2542 - Handle truncated compressed data correctly (by detecting it and
2544 - Fix possible-but-unlikely free(NULL) in control.c.
2545 - When we were closing connections, there was a rare case that
2546 stomped on memory, triggering seg faults and asserts.
2547 - Avoid potential infinite recursion when building a descriptor. (We
2548 don't know that it ever happened, but better to fix it anyway.)
2549 - We were neglecting to unlink marked circuits from soon-to-close OR
2550 connections, which caused some rare scribbling on freed memory.
2551 - Fix a memory stomping race bug when closing the joining point of two
2552 rendezvous circuits.
2553 - Fix an assert in time parsing found by Steven Murdoch.
2555 o Other bugfixes on 0.1.0.x:
2556 - When we're doing reachability testing, provide more useful log
2557 messages so the operator knows what to expect.
2558 - Do not check whether DirPort is reachable when we are suppressing
2559 advertising it because of hibernation.
2560 - When building with -static or on Solaris, we sometimes needed -ldl.
2561 - When we're deciding whether a stream has enough circuits around
2562 that can handle it, count the freshly dirty ones and not the ones
2563 that are so dirty they won't be able to handle it.
2564 - When we're expiring old circuits, we had a logic error that caused
2565 us to close new rendezvous circuits rather than old ones.
2566 - Give a more helpful log message when you try to change ORPort via
2567 the controller: you should upgrade Tor if you want that to work.
2568 - We were failing to parse Tor versions that start with "Tor ".
2569 - Tolerate faulty streams better: when a stream fails for reason
2570 exitpolicy, stop assuming that the router is lying about his exit
2571 policy. When a stream fails for reason misc, allow it to retry just
2572 as if it was resolvefailed. When a stream has failed three times,
2573 reset its failure count so we can try again and get all three tries.
2576 Changes in version 0.1.1.10-alpha - 2005-12-11
2577 o Correctness bugfixes on 0.1.0.x:
2578 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
2579 corrupting the heap, losing FDs, or crashing when we need to resize
2580 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
2581 - Stop doing the complex voodoo overkill checking for insecure
2582 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
2583 - When we were closing connections, there was a rare case that
2584 stomped on memory, triggering seg faults and asserts.
2585 - We were neglecting to unlink marked circuits from soon-to-close OR
2586 connections, which caused some rare scribbling on freed memory.
2587 - When we're deciding whether a stream has enough circuits around
2588 that can handle it, count the freshly dirty ones and not the ones
2589 that are so dirty they won't be able to handle it.
2590 - Recover better from TCP connections to Tor servers that are
2591 broken but don't tell you (it happens!); and rotate TLS
2592 connections once a week.
2593 - When we're expiring old circuits, we had a logic error that caused
2594 us to close new rendezvous circuits rather than old ones.
2595 - Fix a scary-looking but apparently harmless bug where circuits
2596 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
2597 servers, and never switch to state CIRCUIT_STATE_OPEN.
2598 - When building with -static or on Solaris, we sometimes needed to
2600 - Give a useful message when people run Tor as the wrong user,
2601 rather than telling them to start chowning random directories.
2602 - We were failing to inform the controller about new .onion streams.
2604 o Security bugfixes on 0.1.0.x:
2605 - Refuse server descriptors if the fingerprint line doesn't match
2606 the included identity key. Tor doesn't care, but other apps (and
2607 humans) might actually be trusting the fingerprint line.
2608 - We used to kill the circuit when we receive a relay command we
2609 don't recognize. Now we just drop it.
2610 - Start obeying our firewall options more rigorously:
2611 . If we can't get to a dirserver directly, try going via Tor.
2612 . Don't ever try to connect (as a client) to a place our
2613 firewall options forbid.
2614 . If we specify a proxy and also firewall options, obey the
2615 firewall options even when we're using the proxy: some proxies
2616 can only proxy to certain destinations.
2617 - Fix a bug found by Lasse Overlier: when we were making internal
2618 circuits (intended to be cannibalized later for rendezvous and
2619 introduction circuits), we were picking them so that they had
2620 useful exit nodes. There was no need for this, and it actually
2621 aids some statistical attacks.
2622 - Start treating internal circuits and exit circuits separately.
2623 It's important to keep them separate because internal circuits
2624 have their last hops picked like middle hops, rather than like
2625 exit hops. So exiting on them will break the user's expectations.
2627 o Bugfixes on 0.1.1.x:
2628 - Take out the mis-feature where we tried to detect IP address
2629 flapping for people with DynDNS, and chose not to upload a new
2630 server descriptor sometimes.
2631 - Try to be compatible with OpenSSL 0.9.6 again.
2632 - Log fix: when the controller is logging about .onion addresses,
2633 sometimes it didn't include the ".onion" part of the address.
2634 - Don't try to modify options->DirServers internally -- if the
2635 user didn't specify any, just add the default ones directly to
2636 the trusted dirserver list. This fixes a bug where people running
2637 controllers would use SETCONF on some totally unrelated config
2638 option, and Tor would start yelling at them about changing their
2640 - Let the controller's redirectstream command specify a port, in
2641 case the controller wants to change that too.
2642 - When we requested a pile of server descriptors, we sometimes
2643 accidentally launched a duplicate request for the first one.
2644 - Bugfix for trackhostexits: write down the fingerprint of the
2645 chosen exit, not its nickname, because the chosen exit might not
2647 - When parsing foo.exit, if foo is unknown, and we are leaving
2648 circuits unattached, set the chosen_exit field and leave the
2649 address empty. This matters because controllers got confused
2651 - Directory authorities no longer try to download server
2652 descriptors that they know they will reject.
2654 o Features and updates:
2655 - Replace balanced trees with hash tables: this should make stuff
2656 significantly faster.
2657 - Resume using the AES counter-mode implementation that we ship,
2658 rather than OpenSSL's. Ours is significantly faster.
2659 - Many other CPU and memory improvements.
2660 - Add a new config option FastFirstHopPK (on by default) so clients
2661 do a trivial crypto handshake for their first hop, since TLS has
2662 already taken care of confidentiality and authentication.
2663 - Add a new config option TestSocks so people can see if their
2664 applications are using socks4, socks4a, socks5-with-ip, or
2665 socks5-with-hostname. This way they don't have to keep mucking
2666 with tcpdump and wondering if something got cached somewhere.
2667 - Warn when listening on a public address for socks. I suspect a
2668 lot of people are setting themselves up as open socks proxies,
2669 and they have no idea that jerks on the Internet are using them,
2670 since they simply proxy the traffic into the Tor network.
2671 - Add "private:*" as an alias in configuration for policies. Now
2672 you can simplify your exit policy rather than needing to list
2673 every single internal or nonroutable network space.
2674 - Add a new controller event type that allows controllers to get
2675 all server descriptors that were uploaded to a router in its role
2676 as authoritative dirserver.
2677 - Start shipping socks-extensions.txt, tor-doc-unix.html,
2678 tor-doc-server.html, and stylesheet.css in the tarball.
2679 - Stop shipping tor-doc.html in the tarball.
2682 Changes in version 0.1.1.9-alpha - 2005-11-15
2683 o Usability improvements:
2684 - Start calling it FooListenAddress rather than FooBindAddress,
2685 since few of our users know what it means to bind an address
2687 - Reduce clutter in server logs. We're going to try to make
2688 them actually usable now. New config option ProtocolWarnings that
2689 lets you hear about how _other Tors_ are breaking the protocol. Off
2691 - Divide log messages into logging domains. Once we put some sort
2692 of interface on this, it will let people looking at more verbose
2693 log levels specify the topics they want to hear more about.
2694 - Make directory servers return better http 404 error messages
2695 instead of a generic "Servers unavailable".
2696 - Check for even more Windows version flags when writing the platform
2697 string in server descriptors, and note any we don't recognize.
2698 - Clean up more of the OpenSSL memory when exiting, so we can detect
2699 memory leaks better.
2700 - Make directory authorities be non-versioning, non-naming by
2701 default. Now we can add new directory servers without requiring
2702 their operators to pay close attention.
2703 - When logging via syslog, include the pid whenever we provide
2704 a log entry. Suggested by Todd Fries.
2706 o Performance improvements:
2707 - Directory servers now silently throw away new descriptors that
2708 haven't changed much if the timestamps are similar. We do this to
2709 tolerate older Tor servers that upload a new descriptor every 15
2710 minutes. (It seemed like a good idea at the time.)
2711 - Inline bottleneck smartlist functions; use fast versions by default.
2712 - Add a "Map from digest to void*" abstraction digestmap_t so we
2713 can do less hex encoding/decoding. Use it in router_get_by_digest()
2714 to resolve a performance bottleneck.
2715 - Allow tor_gzip_uncompress to extract as much as possible from
2716 truncated compressed data. Try to extract as many
2717 descriptors as possible from truncated http responses (when
2718 DIR_PURPOSE_FETCH_ROUTERDESC).
2719 - Make circ->onionskin a pointer, not a static array. moria2 was using
2720 125000 circuit_t's after it had been up for a few weeks, which
2721 translates to 20+ megs of wasted space.
2722 - The private half of our EDH handshake keys are now chosen out
2723 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
2725 o Security improvements:
2726 - Start making directory caches retain old routerinfos, so soon
2727 clients can start asking by digest of descriptor rather than by
2728 fingerprint of server.
2729 - Add half our entropy from RAND_poll in OpenSSL. This knows how
2730 to use egd (if present), openbsd weirdness (if present), vms/os2
2731 weirdness (if we ever port there), and more in the future.
2733 o Bugfixes on 0.1.0.x:
2734 - Do round-robin writes of at most 16 kB per write. This might be
2735 more fair on loaded Tor servers, and it might resolve our Windows
2736 crash bug. It might also slow things down.
2737 - Our TLS handshakes were generating a single public/private
2738 keypair for the TLS context, rather than making a new one for
2739 each new connections. Oops. (But we were still rotating them
2740 periodically, so it's not so bad.)
2741 - When we were cannibalizing a circuit with a particular exit
2742 node in mind, we weren't checking to see if that exit node was
2743 already present earlier in the circuit. Oops.
2744 - When a Tor server's IP changes (e.g. from a dyndns address),
2745 upload a new descriptor so clients will learn too.
2746 - Really busy servers were keeping enough circuits open on stable
2747 connections that they were wrapping around the circuit_id
2748 space. (It's only two bytes.) This exposed a bug where we would
2749 feel free to reuse a circuit_id even if it still exists but has
2750 been marked for close. Try to fix this bug. Some bug remains.
2751 - If we would close a stream early (e.g. it asks for a .exit that
2752 we know would refuse it) but the LeaveStreamsUnattached config
2753 option is set by the controller, then don't close it.
2755 o Bugfixes on 0.1.1.8-alpha:
2756 - Fix a big pile of memory leaks, some of them serious.
2757 - Do not try to download a routerdesc if we would immediately reject
2759 - Resume inserting a newline between all router descriptors when
2760 generating (old style) signed directories, since our spec says
2762 - When providing content-type application/octet-stream for
2763 server descriptors using .z, we were leaving out the
2764 content-encoding header. Oops. (Everything tolerated this just
2765 fine, but that doesn't mean we need to be part of the problem.)
2766 - Fix a potential seg fault in getconf and getinfo using version 1
2767 of the controller protocol.
2768 - Avoid crash: do not check whether DirPort is reachable when we
2769 are suppressing it because of hibernation.
2770 - Make --hash-password not crash on exit.
2773 Changes in version 0.1.1.8-alpha - 2005-10-07
2774 o New features (major):
2775 - Clients don't download or use the directory anymore. Now they
2776 download and use network-statuses from the trusted dirservers,
2777 and fetch individual server descriptors as needed from mirrors.
2778 See dir-spec.txt for all the gory details.
2779 - Be more conservative about whether to advertise our DirPort.
2780 The main change is to not advertise if we're running at capacity
2781 and either a) we could hibernate or b) our capacity is low and
2782 we're using a default DirPort.
2783 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
2785 o New features (minor):
2786 - Try to be smart about when to retry network-status and
2787 server-descriptor fetches. Still needs some tuning.
2788 - Stop parsing, storing, or using running-routers output (but
2789 mirrors still cache and serve it).
2790 - Consider a threshold of versioning dirservers (dirservers who have
2791 an opinion about which Tor versions are still recommended) before
2792 deciding whether to warn the user that he's obsolete.
2793 - Dirservers can now reject/invalidate by key and IP, with the
2794 config options "AuthDirInvalid" and "AuthDirReject". This is
2795 useful since currently we automatically list servers as running
2796 and usable even if we know they're jerks.
2797 - Provide dire warnings to any users who set DirServer; move it out
2798 of torrc.sample and into torrc.complete.
2799 - Add MyFamily to torrc.sample in the server section.
2800 - Add nicknames to the DirServer line, so we can refer to them
2801 without requiring all our users to memorize their IP addresses.
2802 - When we get an EOF or a timeout on a directory connection, note
2803 how many bytes of serverdesc we are dropping. This will help
2804 us determine whether it is smart to parse incomplete serverdesc
2806 - Add a new function to "change pseudonyms" -- that is, to stop
2807 using any currently-dirty circuits for new streams, so we don't
2808 link new actions to old actions. Currently it's only called on
2809 HUP (or SIGNAL RELOAD).
2810 - On sighup, if UseHelperNodes changed to 1, use new circuits.
2811 - Start using RAND_bytes rather than RAND_pseudo_bytes from
2812 OpenSSL. Also, reseed our entropy every hour, not just at
2813 startup. And entropy in 512-bit chunks, not 160-bit chunks.
2815 o Fixes on 0.1.1.7-alpha:
2816 - Nobody ever implemented EVENT_ADDRMAP for control protocol
2817 version 0, so don't let version 0 controllers ask for it.
2818 - If you requested something with too many newlines via the
2819 v1 controller protocol, you could crash tor.
2820 - Fix a number of memory leaks, including some pretty serious ones.
2821 - Re-enable DirPort testing again, so Tor servers will be willing
2822 to advertise their DirPort if it's reachable.
2823 - On TLS handshake, only check the other router's nickname against
2824 its expected nickname if is_named is set.
2826 o Fixes forward-ported from 0.1.0.15:
2827 - Don't crash when we don't have any spare file descriptors and we
2828 try to spawn a dns or cpu worker.
2829 - Make the numbers in read-history and write-history into uint64s,
2830 so they don't overflow and publish negatives in the descriptor.
2833 - For the OS X package's modified privoxy config file, comment
2834 out the "logfile" line so we don't log everything passed
2836 - We were whining about using socks4 or socks5-with-local-lookup
2837 even when it's an IP in the "virtual" range we designed exactly
2839 - We were leaking some memory every time the client changes IPs.
2840 - Never call free() on tor_malloc()d memory. This will help us
2841 use dmalloc to detect memory leaks.
2842 - Check for named servers when looking them up by nickname;
2843 warn when we'recalling a non-named server by its nickname;
2844 don't warn twice about the same name.
2845 - Try to list MyFamily elements by key, not by nickname, and warn
2846 if we've not heard of the server.
2847 - Make windows platform detection (uname equivalent) smarter.
2848 - It turns out sparc64 doesn't like unaligned access either.
2851 Changes in version 0.1.0.15 - 2005-09-23
2852 o Bugfixes on 0.1.0.x:
2853 - Reject ports 465 and 587 (spam targets) in default exit policy.
2854 - Don't crash when we don't have any spare file descriptors and we
2855 try to spawn a dns or cpu worker.
2856 - Get rid of IgnoreVersion undocumented config option, and make us
2857 only warn, never exit, when we're running an obsolete version.
2858 - Don't try to print a null string when your server finds itself to
2859 be unreachable and the Address config option is empty.
2860 - Make the numbers in read-history and write-history into uint64s,
2861 so they don't overflow and publish negatives in the descriptor.
2862 - Fix a minor memory leak in smartlist_string_remove().
2863 - We were only allowing ourselves to upload a server descriptor at
2864 most every 20 minutes, even if it changed earlier than that.
2865 - Clean up log entries that pointed to old URLs.
2868 Changes in version 0.1.1.7-alpha - 2005-09-14
2869 o Fixes on 0.1.1.6-alpha:
2870 - Exit servers were crashing when people asked them to make a
2871 connection to an address not in their exit policy.
2872 - Looking up a non-existent stream for a v1 control connection would
2874 - Fix a seg fault if we ask a dirserver for a descriptor by
2875 fingerprint but he doesn't know about him.
2876 - SETCONF was appending items to linelists, not clearing them.
2877 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
2878 out and refuse the setconf if it would fail.
2879 - Downgrade the dirserver log messages when whining about
2883 - Add Peter Palfrader's check-tor script to tor/contrib/
2884 It lets you easily check whether a given server (referenced by
2885 nickname) is reachable by you.
2886 - Numerous changes to move towards client-side v2 directories. Not
2890 - If the user gave tor an odd number of command-line arguments,
2891 we were silently ignoring the last one. Now we complain and fail.
2892 [This wins the oldest-bug prize -- this bug has been present since
2893 November 2002, as released in Tor 0.0.0.]
2894 - Do not use unaligned memory access on alpha, mips, or mipsel.
2895 It *works*, but is very slow, so we treat them as if it doesn't.
2896 - Retry directory requests if we fail to get an answer we like
2897 from a given dirserver (we were retrying before, but only if
2898 we fail to connect).
2899 - When writing the RecommendedVersions line, sort them first.
2900 - When the client asked for a rendezvous port that the hidden
2901 service didn't want to provide, we were sending an IP address
2902 back along with the end cell. Fortunately, it was zero. But stop
2904 - Correct "your server is reachable" log entries to indicate that
2905 it was self-testing that told us so.
2908 Changes in version 0.1.1.6-alpha - 2005-09-09
2909 o Fixes on 0.1.1.5-alpha:
2910 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
2911 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
2912 - Fix bug with tor_memmem finding a match at the end of the string.
2913 - Make unit tests run without segfaulting.
2914 - Resolve some solaris x86 compile warnings.
2915 - Handle duplicate lines in approved-routers files without warning.
2916 - Fix bug where as soon as a server refused any requests due to his
2917 exit policy (e.g. when we ask for localhost and he tells us that's
2918 127.0.0.1 and he won't do it), we decided he wasn't obeying his
2919 exit policy using him for any exits.
2920 - Only do openssl hardware accelerator stuff if openssl version is
2923 o New controller features/fixes:
2924 - Add a "RESETCONF" command so you can set config options like
2925 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
2926 a config option in the torrc with no value, then it clears it
2927 entirely (rather than setting it to its default).
2928 - Add a "GETINFO config-file" to tell us where torrc is.
2929 - Avoid sending blank lines when GETINFO replies should be empty.
2930 - Add a QUIT command for the controller (for using it manually).
2931 - Fix a bug in SAVECONF that was adding default dirservers and
2932 other redundant entries to the torrc file.
2934 o Start on the new directory design:
2935 - Generate, publish, cache, serve new network-status format.
2936 - Publish individual descriptors (by fingerprint, by "all", and by
2938 - Publish client and server recommended versions separately.
2939 - Allow tor_gzip_uncompress() to handle multiple concatenated
2940 compressed strings. Serve compressed groups of router
2941 descriptors. The compression logic here could be more
2943 - Distinguish v1 authorities (all currently trusted directories)
2944 from v2 authorities (all trusted directories).
2945 - Change DirServers config line to note which dirs are v1 authorities.
2946 - Add configuration option "V1AuthoritativeDirectory 1" which
2947 moria1, moria2, and tor26 should set.
2948 - Remove option when getting directory cache to see whether they
2949 support running-routers; they all do now. Replace it with one
2950 to see whether caches support v2 stuff.
2953 - Dirservers now do their own external reachability testing of each
2954 Tor server, and only list them as running if they've been found to
2955 be reachable. We also send back warnings to the server's logs if
2956 it uploads a descriptor that we already believe is unreachable.
2957 - Implement exit enclaves: if we know an IP address for the
2958 destination, and there's a running Tor server at that address
2959 which allows exit to the destination, then extend the circuit to
2960 that exit first. This provides end-to-end encryption and end-to-end
2961 authentication. Also, if the user wants a .exit address or enclave,
2962 use 4 hops rather than 3, and cannibalize a general circ for it
2964 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
2965 controller. Also, rotate dns and cpu workers if the controller
2966 changes options that will affect them; and initialize the dns
2967 worker cache tree whether or not we start out as a server.
2968 - Only upload a new server descriptor when options change, 18
2969 hours have passed, uptime is reset, or bandwidth changes a lot.
2970 - Check [X-]Forwarded-For headers in HTTP requests when generating
2971 log messages. This lets people run dirservers (and caches) behind
2972 Apache but still know which IP addresses are causing warnings.
2974 o Config option changes:
2975 - Replace (Fascist)Firewall* config options with a new
2976 ReachableAddresses option that understands address policies.
2977 For example, "ReachableAddresses *:80,*:443"
2978 - Get rid of IgnoreVersion undocumented config option, and make us
2979 only warn, never exit, when we're running an obsolete version.
2980 - Make MonthlyAccountingStart config option truly obsolete now.
2983 - Reject ports 465 and 587 in the default exit policy, since
2984 people have started using them for spam too.
2985 - It turns out we couldn't bootstrap a network since we added
2986 reachability detection in 0.1.0.1-rc. Good thing the Tor network
2987 has never gone down. Add an AssumeReachable config option to let
2988 servers and dirservers bootstrap. When we're trying to build a
2989 high-uptime or high-bandwidth circuit but there aren't enough
2990 suitable servers, try being less picky rather than simply failing.
2991 - Our logic to decide if the OR we connected to was the right guy
2992 was brittle and maybe open to a mitm for unverified routers.
2993 - We weren't cannibalizing circuits correctly for
2994 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
2995 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
2996 build those from scratch. This should make hidden services faster.
2997 - Predict required circuits better, with an eye toward making hidden
2998 services faster on the service end.
2999 - Retry streams if the exit node sends back a 'misc' failure. This
3000 should result in fewer random failures. Also, after failing
3001 from resolve failed or misc, reset the num failures, so we give
3002 it a fair shake next time we try.
3003 - Clean up the rendezvous warn log msgs, and downgrade some to info.
3004 - Reduce severity on logs about dns worker spawning and culling.
3005 - When we're shutting down and we do something like try to post a
3006 server descriptor or rendezvous descriptor, don't complain that
3007 we seem to be unreachable. Of course we are, we're shutting down.
3008 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
3009 We don't use them yet, but maybe one day our DNS resolver will be
3010 able to discover them.
3011 - Make ContactInfo mandatory for authoritative directory servers.
3012 - Require server descriptors to list IPv4 addresses -- hostnames
3013 are no longer allowed. This also fixes some potential security
3014 problems with people providing hostnames as their address and then
3015 preferentially resolving them to partition users.
3016 - Change log line for unreachability to explicitly suggest /etc/hosts
3017 as the culprit. Also make it clearer what IP address and ports we're
3018 testing for reachability.
3019 - Put quotes around user-supplied strings when logging so users are
3020 more likely to realize if they add bad characters (like quotes)
3022 - Let auth dir servers start without specifying an Address config
3024 - Make unit tests (and other invocations that aren't the real Tor)
3025 run without launching listeners, creating subdirectories, and so on.
3028 Changes in version 0.1.1.5-alpha - 2005-08-08
3029 o Bugfixes included in 0.1.0.14.
3031 o Bugfixes on 0.1.0.x:
3032 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
3033 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
3034 it would silently using ignore the 6668.
3037 Changes in version 0.1.0.14 - 2005-08-08
3038 o Bugfixes on 0.1.0.x:
3039 - Fix the other half of the bug with crypto handshakes
3041 - Fix an assert trigger if you send a 'signal term' via the
3042 controller when it's listening for 'event info' messages.
3045 Changes in version 0.1.1.4-alpha - 2005-08-04
3046 o Bugfixes included in 0.1.0.13.
3049 - Improve tor_gettimeofday() granularity on windows.
3050 - Make clients regenerate their keys when their IP address changes.
3051 - Implement some more GETINFO goodness: expose helper nodes, config
3052 options, getinfo keys.
3055 Changes in version 0.1.0.13 - 2005-08-04
3056 o Bugfixes on 0.1.0.x:
3057 - Fix a critical bug in the security of our crypto handshakes.
3058 - Fix a size_t underflow in smartlist_join_strings2() that made
3059 it do bad things when you hand it an empty smartlist.
3060 - Fix Windows installer to ship Tor license (thanks to Aphex for
3061 pointing out this oversight) and put a link to the doc directory
3063 - Explicitly set no-unaligned-access for sparc: it turns out the
3064 new gcc's let you compile broken code, but that doesn't make it
3068 Changes in version 0.1.1.3-alpha - 2005-07-23
3069 o Bugfixes on 0.1.1.2-alpha:
3070 - Fix a bug in handling the controller's "post descriptor"
3072 - Fix several bugs in handling the controller's "extend circuit"
3074 - Fix a bug in handling the controller's "stream status" event.
3075 - Fix an assert failure if we have a controller listening for
3076 circuit events and we go offline.
3077 - Re-allow hidden service descriptors to publish 0 intro points.
3078 - Fix a crash when generating your hidden service descriptor if
3079 you don't have enough intro points already.
3081 o New features on 0.1.1.2-alpha:
3082 - New controller function "getinfo accounting", to ask how
3083 many bytes we've used in this time period.
3084 - Experimental support for helper nodes: a lot of the risk from
3085 a small static adversary comes because users pick new random
3086 nodes every time they rebuild a circuit. Now users will try to
3087 stick to the same small set of entry nodes if they can. Not
3088 enabled by default yet.
3090 o Bugfixes on 0.1.0.12:
3091 - If you're an auth dir server, always publish your dirport,
3092 even if you haven't yet found yourself to be reachable.
3093 - Fix a size_t underflow in smartlist_join_strings2() that made
3094 it do bad things when you hand it an empty smartlist.
3097 Changes in version 0.1.0.12 - 2005-07-18
3098 o New directory servers:
3099 - tor26 has changed IP address.
3101 o Bugfixes on 0.1.0.x:
3102 - Fix a possible double-free in tor_gzip_uncompress().
3103 - When --disable-threads is set, do not search for or link against
3105 - Don't trigger an assert if an authoritative directory server
3106 claims its dirport is 0.
3107 - Fix bug with removing Tor as an NT service: some people were
3108 getting "The service did not return an error." Thanks to Matt
3112 Changes in version 0.1.1.2-alpha - 2005-07-15
3113 o New directory servers:
3114 - tor26 has changed IP address.
3116 o Bugfixes on 0.1.0.x, crashes/leaks:
3117 - Port the servers-not-obeying-their-exit-policies fix from
3119 - Fix an fd leak in start_daemon().
3120 - On Windows, you can't always reopen a port right after you've
3121 closed it. So change retry_listeners() to only close and re-open
3122 ports that have changed.
3123 - Fix a possible double-free in tor_gzip_uncompress().
3125 o Bugfixes on 0.1.0.x, usability:
3126 - When tor_socketpair() fails in Windows, give a reasonable
3127 Windows-style errno back.
3128 - Let people type "tor --install" as well as "tor -install" when
3130 want to make it an NT service.
3131 - NT service patch from Matt Edman to improve error messages.
3132 - When the controller asks for a config option with an abbreviated
3133 name, give the full name in our response.
3134 - Correct the man page entry on TrackHostExitsExpire.
3135 - Looks like we were never delivering deflated (i.e. compressed)
3136 running-routers lists, even when asked. Oops.
3137 - When --disable-threads is set, do not search for or link against
3140 o Bugfixes on 0.1.1.x:
3141 - Fix a seg fault with autodetecting which controller version is
3145 - New hidden service descriptor format: put a version in it, and
3146 let people specify introduction/rendezvous points that aren't
3147 in "the directory" (which is subjective anyway).
3148 - Allow the DEBUG controller event to work again. Mark certain log
3149 entries as "don't tell this to controllers", so we avoid cycles.
3152 Changes in version 0.1.0.11 - 2005-06-30
3153 o Bugfixes on 0.1.0.x:
3154 - Fix major security bug: servers were disregarding their
3155 exit policies if clients behaved unexpectedly.
3156 - Make OS X init script check for missing argument, so we don't
3157 confuse users who invoke it incorrectly.
3158 - Fix a seg fault in "tor --hash-password foo".
3159 - The MAPADDRESS control command was broken.
3162 Changes in version 0.1.1.1-alpha - 2005-06-29
3164 - Make OS X init script check for missing argument, so we don't
3165 confuse users who invoke it incorrectly.
3166 - Fix a seg fault in "tor --hash-password foo".
3167 - Fix a possible way to DoS dirservers.
3168 - When we complain that your exit policy implicitly allows local or
3169 private address spaces, name them explicitly so operators can
3171 - Make the log message less scary when all the dirservers are
3172 temporarily unreachable.
3173 - We were printing the number of idle dns workers incorrectly when
3177 - Revised controller protocol (version 1) that uses ascii rather
3178 than binary. Add supporting libraries in python and java so you
3179 can use the controller from your applications without caring how
3181 - Spiffy new support for crypto hardware accelerators. Can somebody
3185 Changes in version 0.0.9.10 - 2005-06-16
3186 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
3187 - Refuse relay cells that claim to have a length larger than the
3188 maximum allowed. This prevents a potential attack that could read
3189 arbitrary memory (e.g. keys) from an exit server's process
3193 Changes in version 0.1.0.10 - 2005-06-14
3194 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
3195 libevent before 1.1a.
3198 Changes in version 0.1.0.9-rc - 2005-06-09
3200 - Reset buf->highwater every time buf_shrink() is called, not just on
3201 a successful shrink. This was causing significant memory bloat.
3202 - Fix buffer overflow when checking hashed passwords.
3203 - Security fix: if seeding the RNG on Win32 fails, quit.
3204 - Allow seeding the RNG on Win32 even when you're not running as
3206 - Disable threading on Solaris too. Something is wonky with it,
3207 cpuworkers, and reentrant libs.
3208 - Reenable the part of the code that tries to flush as soon as an
3209 OR outbuf has a full TLS record available. Perhaps this will make
3210 OR outbufs not grow as huge except in rare cases, thus saving lots
3211 of CPU time plus memory.
3212 - Reject malformed .onion addresses rather then passing them on as
3213 normal web requests.
3214 - Adapt patch from Adam Langley: fix possible memory leak in
3215 tor_lookup_hostname().
3216 - Initialize libevent later in the startup process, so the logs are
3217 already established by the time we start logging libevent warns.
3218 - Use correct errno on win32 if libevent fails.
3219 - Check and warn about known-bad/slow libevent versions.
3220 - Pay more attention to the ClientOnly config option.
3221 - Have torctl.in/tor.sh.in check for location of su binary (needed
3223 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
3224 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
3225 HttpProxyAuthenticator
3226 - Stop warning about sigpipes in the logs. We're going to
3227 pretend that getting these occassionally is normal and fine.
3228 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
3230 installer screens; and don't put stuff into StartupItems unless
3231 the user asks you to.
3232 - Require servers that use the default dirservers to have public IP
3233 addresses. We have too many servers that are configured with private
3234 IPs and their admins never notice the log entries complaining that
3235 their descriptors are being rejected.
3236 - Add OSX uninstall instructions. An actual uninstall script will
3240 Changes in version 0.1.0.8-rc - 2005-05-23
3242 - It turns out that kqueue on OS X 10.3.9 was causing kernel
3243 panics. Disable kqueue on all OS X Tors.
3244 - Fix RPM: remove duplicate line accidentally added to the rpm
3246 - Disable threads on openbsd too, since its gethostaddr is not
3248 - Tolerate libevent 0.8 since it still works, even though it's
3250 - Enable building on Red Hat 9.0 again.
3251 - Allow the middle hop of the testing circuit to be running any
3252 version, now that most of them have the bugfix to let them connect
3253 to unknown servers. This will allow reachability testing to work
3254 even when 0.0.9.7-0.0.9.9 become obsolete.
3255 - Handle relay cells with rh.length too large. This prevents
3256 a potential attack that could read arbitrary memory (maybe even
3257 keys) from the exit server's process.
3258 - We screwed up the dirport reachability testing when we don't yet
3259 have a cached version of the directory. Hopefully now fixed.
3260 - Clean up router_load_single_router() (used by the controller),
3261 so it doesn't seg fault on error.
3262 - Fix a minor memory leak when somebody establishes an introduction
3263 point at your Tor server.
3264 - If a socks connection ends because read fails, don't warn that
3265 you're not sending a socks reply back.
3268 - Add HttpProxyAuthenticator config option too, that works like
3269 the HttpsProxyAuthenticator config option.
3270 - Encode hashed controller passwords in hex instead of base64,
3271 to make it easier to write controllers.
3274 Changes in version 0.1.0.7-rc - 2005-05-17
3276 - Fix a bug in the OS X package installer that prevented it from
3277 installing on Tiger.
3278 - Fix a script bug in the OS X package installer that made it
3279 complain during installation.
3280 - Find libevent even if it's hiding in /usr/local/ and your
3281 CFLAGS and LDFLAGS don't tell you to look there.
3282 - Be able to link with libevent as a shared library (the default
3283 after 1.0d), even if it's hiding in /usr/local/lib and even
3284 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
3285 assuming you're running gcc. Otherwise fail and give a useful
3287 - Fix a bug in the RPM packager: set home directory for _tor to
3288 something more reasonable when first installing.
3289 - Free a minor amount of memory that is still reachable on exit.
3292 Changes in version 0.1.0.6-rc - 2005-05-14
3294 - Implement --disable-threads configure option. Disable threads on
3295 netbsd by default, because it appears to have no reentrant resolver
3297 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
3298 release (1.1) detects and disables kqueue if it's broken.
3299 - Append default exit policy before checking for implicit internal
3300 addresses. Now we don't log a bunch of complaints on startup
3301 when using the default exit policy.
3302 - Some people were putting "Address " in their torrc, and they had
3303 a buggy resolver that resolved " " to 0.0.0.0. Oops.
3304 - If DataDir is ~/.tor, and that expands to /.tor, then default to
3305 LOCALSTATEDIR/tor instead.
3306 - Fix fragmented-message bug in TorControl.py.
3307 - Resolve a minor bug which would prevent unreachable dirports
3308 from getting suppressed in the published descriptor.
3309 - When the controller gave us a new descriptor, we weren't resolving
3310 it immediately, so Tor would think its address was 0.0.0.0 until
3311 we fetched a new directory.
3312 - Fix an uppercase/lowercase case error in suppressing a bogus
3313 libevent warning on some Linuxes.
3316 - Begin scrubbing sensitive strings from logs by default. Turn off
3317 the config option SafeLogging if you need to do debugging.
3318 - Switch to a new buffer management algorithm, which tries to avoid
3319 reallocing and copying quite as much. In first tests it looks like
3320 it uses *more* memory on average, but less cpu.
3321 - First cut at support for "create-fast" cells. Clients can use
3322 these when extending to their first hop, since the TLS already
3323 provides forward secrecy and authentication. Not enabled on
3325 - When dirservers refuse a router descriptor, we now log its
3326 contactinfo, platform, and the poster's IP address.
3327 - Call tor_free_all instead of connections_free_all after forking, to
3328 save memory on systems that need to fork.
3329 - Whine at you if you're a server and you don't set your contactinfo.
3330 - Implement --verify-config command-line option to check if your torrc
3331 is valid without actually launching Tor.
3332 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
3333 rather than just rejecting it.
3336 Changes in version 0.1.0.5-rc - 2005-04-27
3338 - Stop trying to print a null pointer if an OR conn fails because
3339 we didn't like its cert.
3341 - Switch our internal buffers implementation to use a ring buffer,
3342 to hopefully improve performance for fast servers a lot.
3343 - Add HttpsProxyAuthenticator support (basic auth only), based
3344 on patch from Adam Langley.
3345 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
3346 the fast servers that have been joining lately.
3347 - Give hidden service accesses extra time on the first attempt,
3348 since 60 seconds is often only barely enough. This might improve
3350 - Improve performance for dirservers: stop re-parsing the whole
3351 directory every time you regenerate it.
3352 - Add more debugging info to help us find the weird dns freebsd
3353 pthreads bug; cleaner debug messages to help track future issues.
3356 Changes in version 0.0.9.9 - 2005-04-23
3357 o Bugfixes on 0.0.9.x:
3358 - If unofficial Tor clients connect and send weird TLS certs, our
3359 Tor server triggers an assert. This release contains a minimal
3360 backport from the broader fix that we put into 0.1.0.4-rc.
3363 Changes in version 0.1.0.4-rc - 2005-04-23
3365 - If unofficial Tor clients connect and send weird TLS certs, our
3366 Tor server triggers an assert. Stop asserting, and start handling
3367 TLS errors better in other situations too.
3368 - When the controller asks us to tell it about all the debug-level
3369 logs, it turns out we were generating debug-level logs while
3370 telling it about them, which turns into a bad loop. Now keep
3371 track of whether you're sending a debug log to the controller,
3372 and don't log when you are.
3373 - Fix the "postdescriptor" feature of the controller interface: on
3374 non-complete success, only say "done" once.
3376 - Clients are now willing to load balance over up to 2mB, not 1mB,
3377 of advertised bandwidth capacity.
3378 - Add a NoPublish config option, so you can be a server (e.g. for
3379 testing running Tor servers in other Tor networks) without
3380 publishing your descriptor to the primary dirservers.
3383 Changes in version 0.1.0.3-rc - 2005-04-08
3384 o Improvements on 0.1.0.2-rc:
3385 - Client now retries when streams end early for 'hibernating' or
3386 'resource limit' reasons, rather than failing them.
3387 - More automated handling for dirserver operators:
3388 - Automatically approve nodes running 0.1.0.2-rc or later,
3389 now that the the reachability detection stuff is working.
3390 - Now we allow two unverified servers with the same nickname
3391 but different keys. But if a nickname is verified, only that
3392 nickname+key are allowed.
3393 - If you're an authdirserver connecting to an address:port,
3394 and it's not the OR you were expecting, forget about that
3395 descriptor. If he *was* the one you were expecting, then forget
3396 about all other descriptors for that address:port.
3397 - Allow servers to publish descriptors from 12 hours in the future.
3398 Corollary: only whine about clock skew from the dirserver if
3399 he's a trusted dirserver (since now even verified servers could
3400 have quite wrong clocks).
3401 - Adjust maximum skew and age for rendezvous descriptors: let skew
3402 be 48 hours rather than 90 minutes.
3403 - Efficiency improvements:
3404 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
3405 it much faster to look up a circuit for each relay cell.
3406 - Remove most calls to assert_all_pending_dns_resolves_ok(),
3407 since they're eating our cpu on exit nodes.
3408 - Stop wasting time doing a case insensitive comparison for every
3409 dns name every time we do any lookup. Canonicalize the names to
3410 lowercase and be done with it.
3411 - Start sending 'truncated' cells back rather than destroy cells,
3412 if the circuit closes in front of you. This means we won't have
3413 to abandon partially built circuits.
3414 - Only warn once per nickname from add_nickname_list_to_smartlist
3415 per failure, so an entrynode or exitnode choice that's down won't
3417 - Put a note in the torrc about abuse potential with the default
3419 - Revise control spec and implementation to allow all log messages to
3420 be sent to controller with their severities intact (suggested by
3421 Matt Edman). Update TorControl to handle new log event types.
3422 - Provide better explanation messages when controller's POSTDESCRIPTOR
3424 - Stop putting nodename in the Platform string in server descriptors.
3425 It doesn't actually help, and it is confusing/upsetting some people.
3427 o Bugfixes on 0.1.0.2-rc:
3428 - We were printing the host mask wrong in exit policies in server
3429 descriptors. This isn't a critical bug though, since we were still
3430 obeying the exit policy internally.
3431 - Fix Tor when compiled with libevent but without pthreads: move
3432 connection_unregister() from _connection_free() to
3434 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
3435 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
3436 when we look through the connection array, we'll find any of the
3437 cpu/dnsworkers. This is no good.
3439 o Bugfixes on 0.0.9.8:
3440 - Fix possible bug on threading platforms (e.g. win32) which was
3441 leaking a file descriptor whenever a cpuworker or dnsworker died.
3442 - When using preferred entry or exit nodes, ignore whether the
3443 circuit wants uptime or capacity. They asked for the nodes, they
3445 - chdir() to your datadirectory at the *end* of the daemonize process,
3446 not the beginning. This was a problem because the first time you
3447 run tor, if your datadir isn't there, and you have runasdaemon set
3448 to 1, it will try to chdir to it before it tries to create it. Oops.
3449 - Handle changed router status correctly when dirserver reloads
3450 fingerprint file. We used to be dropping all unverified descriptors
3451 right then. The bug was hidden because we would immediately
3452 fetch a directory from another dirserver, which would include the
3453 descriptors we just dropped.
3454 - When we're connecting to an OR and he's got a different nickname/key
3455 than we were expecting, only complain loudly if we're an OP or a
3456 dirserver. Complaining loudly to the OR admins just confuses them.
3457 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
3458 artificially capped at 500kB.
3461 Changes in version 0.0.9.8 - 2005-04-07
3462 o Bugfixes on 0.0.9.x:
3463 - We have a bug that I haven't found yet. Sometimes, very rarely,
3464 cpuworkers get stuck in the 'busy' state, even though the cpuworker
3465 thinks of itself as idle. This meant that no new circuits ever got
3466 established. Here's a workaround to kill any cpuworker that's been
3467 busy for more than 100 seconds.
3470 Changes in version 0.1.0.2-rc - 2005-04-01
3471 o Bugfixes on 0.1.0.1-rc:
3472 - Fixes on reachability detection:
3473 - Don't check for reachability while hibernating.
3474 - If ORPort is reachable but DirPort isn't, still publish the
3475 descriptor, but zero out DirPort until it's found reachable.
3476 - When building testing circs for ORPort testing, use only
3477 high-bandwidth nodes, so fewer circuits fail.
3478 - Complain about unreachable ORPort separately from unreachable
3479 DirPort, so the user knows what's going on.
3480 - Make sure we only conclude ORPort reachability if we didn't
3481 initiate the conn. Otherwise we could falsely conclude that
3482 we're reachable just because we connected to the guy earlier
3483 and he used that same pipe to extend to us.
3484 - Authdirservers shouldn't do ORPort reachability detection,
3485 since they're in clique mode, so it will be rare to find a
3486 server not already connected to them.
3487 - When building testing circuits, always pick middle hops running
3488 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
3489 bug. (This is a kludge; it will go away when 0.0.9.x becomes
3491 - When we decide we're reachable, actually publish our descriptor
3493 - Fix bug in redirectstream in the controller.
3494 - Fix the state descriptor strings so logs don't claim edge streams
3495 are in a different state than they actually are.
3496 - Use recent libevent features when possible (this only really affects
3497 win32 and osx right now, because the new libevent with these
3498 features hasn't been released yet). Add code to suppress spurious
3500 - Prevent possible segfault in connection_close_unattached_ap().
3501 - Fix newlines on torrc in win32.
3502 - Improve error msgs when tor-resolve fails.
3504 o Improvements on 0.0.9.x:
3505 - New experimental script tor/contrib/ExerciseServer.py (needs more
3506 work) that uses the controller interface to build circuits and
3507 fetch pages over them. This will help us bootstrap servers that
3508 have lots of capacity but haven't noticed it yet.
3509 - New experimental script tor/contrib/PathDemo.py (needs more work)
3510 that uses the controller interface to let you choose whole paths
3512 "<hostname>.<path,separated by dots>.<length of path>.path"
3513 - When we've connected to an OR and handshaked but didn't like
3514 the result, we were closing the conn without sending destroy
3515 cells back for pending circuits. Now send those destroys.
3518 Changes in version 0.0.9.7 - 2005-04-01
3519 o Bugfixes on 0.0.9.x:
3520 - Fix another race crash bug (thanks to Glenn Fink for reporting).
3521 - Compare identity to identity, not to nickname, when extending to
3522 a router not already in the directory. This was preventing us from
3523 extending to unknown routers. Oops.
3524 - Make sure to create OS X Tor user in <500 range, so we aren't
3525 creating actual system users.
3526 - Note where connection-that-hasn't-sent-end was marked, and fix
3527 a few really loud instances of this harmless bug (it's fixed more
3531 Changes in version 0.1.0.1-rc - 2005-03-28
3533 - Add reachability testing. Your Tor server will automatically try
3534 to see if its ORPort and DirPort are reachable from the outside,
3535 and it won't upload its descriptor until it decides they are.
3536 - Handle unavailable hidden services better. Handle slow or busy
3537 hidden services better.
3538 - Add support for CONNECTing through https proxies, with "HttpsProxy"
3540 - New exit policy: accept most low-numbered ports, rather than
3541 rejecting most low-numbered ports.
3542 - More Tor controller support (still experimental). See
3543 http://tor.eff.org/doc/control-spec.txt for all the new features,
3544 including signals to emulate unix signals from any platform;
3545 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
3546 closestream; closecircuit; etc.
3547 - Make nt services work and start on startup on win32 (based on
3548 patch by Matt Edman).
3549 - Add a new AddressMap config directive to rewrite incoming socks
3550 addresses. This lets you, for example, declare an implicit
3551 required exit node for certain sites.
3552 - Add a new TrackHostExits config directive to trigger addressmaps
3553 for certain incoming socks addresses -- for sites that break when
3554 your exit keeps changing (based on patch by Mike Perry).
3555 - Redo the client-side dns cache so it's just an addressmap too.
3556 - Notice when our IP changes, and reset stats/uptime/reachability.
3557 - When an application is using socks5, give him the whole variety of
3558 potential socks5 responses (connect refused, host unreachable, etc),
3559 rather than just "success" or "failure".
3560 - A more sane version numbering system. See
3561 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
3562 - New contributed script "exitlist": a simple python script to
3563 parse directories and find Tor nodes that exit to listed
3565 - New contributed script "privoxy-tor-toggle" to toggle whether
3566 Privoxy uses Tor. Seems to be configured for Debian by default.
3567 - Report HTTP reasons to client when getting a response from directory
3568 servers -- so you can actually know what went wrong.
3569 - New config option MaxAdvertisedBandwidth which lets you advertise
3570 a low bandwidthrate (to not attract as many circuits) while still
3571 allowing a higher bandwidthrate in reality.
3573 o Robustness/stability fixes:
3574 - Make Tor use Niels Provos's libevent instead of its current
3575 poll-but-sometimes-select mess. This will let us use faster async
3576 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
3578 - pthread support now too. This was forced because when we forked,
3579 we ended up wasting a lot of duplicate ram over time. Also switch
3580 to foo_r versions of some library calls to allow reentry and
3582 - Better handling for heterogeneous / unreliable nodes:
3583 - Annotate circuits w/ whether they aim to contain high uptime nodes
3584 and/or high capacity nodes. When building circuits, choose
3586 - This means that every single node in an intro rend circuit,
3587 not just the last one, will have a minimum uptime.
3588 - New config option LongLivedPorts to indicate application streams
3589 that will want high uptime circuits.
3590 - Servers reset uptime when a dir fetch entirely fails. This
3591 hopefully reflects stability of the server's network connectivity.
3592 - If somebody starts his tor server in Jan 2004 and then fixes his
3593 clock, don't make his published uptime be a year.
3594 - Reset published uptime when you wake up from hibernation.
3595 - Introduce a notion of 'internal' circs, which are chosen without
3596 regard to the exit policy of the last hop. Intro and rendezvous
3597 circs must be internal circs, to avoid leaking information. Resolve
3598 and connect streams can use internal circs if they want.
3599 - New circuit pooling algorithm: make sure to have enough circs around
3600 to satisfy any predicted ports, and also make sure to have 2 internal
3601 circs around if we've required internal circs lately (and with high
3602 uptime if we've seen that lately too).
3603 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
3604 which describes how often we retry making new circuits if current
3605 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
3606 how long we're willing to make use of an already-dirty circuit.
3607 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
3608 circ as necessary, if there are any completed ones lying around
3609 when we try to launch one.
3610 - Make hidden services try to establish a rendezvous for 30 seconds,
3611 rather than for n (where n=3) attempts to build a circuit.
3612 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
3613 "ShutdownWaitLength".
3614 - Try to be more zealous about calling connection_edge_end when
3615 things go bad with edge conns in connection.c.
3616 - Revise tor-spec to add more/better stream end reasons.
3617 - Revise all calls to connection_edge_end to avoid sending "misc",
3618 and to take errno into account where possible.
3621 - Fix a race condition that can trigger an assert, when we have a
3622 pending create cell and an OR connection fails right then.
3623 - Fix several double-mark-for-close bugs, e.g. where we were finding
3624 a conn for a cell even if that conn is already marked for close.
3625 - Make sequence of log messages when starting on win32 with no config
3626 file more reasonable.
3627 - When choosing an exit node for a new non-internal circ, don't take
3628 into account whether it'll be useful for any pending x.onion
3629 addresses -- it won't.
3630 - Turn addr_policy_compare from a tristate to a quadstate; this should
3631 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
3632 for google.com" problem.
3633 - Make "platform" string in descriptor more accurate for Win32 servers,
3634 so it's not just "unknown platform".
3635 - Fix an edge case in parsing config options (thanks weasel).
3636 If they say "--" on the commandline, it's not an option.
3637 - Reject odd-looking addresses at the client (e.g. addresses that
3638 contain a colon), rather than having the server drop them because
3640 - tor-resolve requests were ignoring .exit if there was a working circuit
3641 they could use instead.
3642 - REUSEADDR on normal platforms means you can rebind to the port
3643 right after somebody else has let it go. But REUSEADDR on win32
3644 means to let you bind to the port _even when somebody else
3645 already has it bound_! So, don't do that on Win32.
3646 - Change version parsing logic: a version is "obsolete" if it is not
3647 recommended and (1) there is a newer recommended version in the
3648 same series, or (2) there are no recommended versions in the same
3649 series, but there are some recommended versions in a newer series.
3650 A version is "new" if it is newer than any recommended version in
3652 - Stop most cases of hanging up on a socks connection without sending
3656 - Require BandwidthRate to be at least 20kB/s for servers.
3657 - When a dirserver causes you to give a warn, mention which dirserver
3659 - New config option DirAllowPrivateAddresses for authdirservers.
3660 Now by default they refuse router descriptors that have non-IP or
3661 private-IP addresses.
3662 - Stop publishing socksport in the directory, since it's not
3663 actually meant to be public. For compatibility, publish a 0 there
3665 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
3666 smart" value, that is low for servers and high for clients.
3667 - If our clock jumps forward by 100 seconds or more, assume something
3668 has gone wrong with our network and abandon all not-yet-used circs.
3669 - Warn when exit policy implicitly allows local addresses.
3670 - If we get an incredibly skewed timestamp from a dirserver mirror
3671 that isn't a verified OR, don't warn -- it's probably him that's
3673 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
3674 cookies to disk and doesn't log each web request to disk. (Thanks
3675 to Brett Carrington for pointing this out.)
3676 - When a client asks us for a dir mirror and we don't have one,
3677 launch an attempt to get a fresh one.
3678 - If we're hibernating and we get a SIGINT, exit immediately.
3679 - Add --with-dmalloc ./configure option, to track memory leaks.
3680 - And try to free all memory on closing, so we can detect what
3682 - Cache local dns resolves correctly even when they're .exit
3684 - Give a better warning when some other server advertises an
3685 ORPort that is actually an apache running ssl.
3686 - Add "opt hibernating 1" to server descriptor to make it clearer
3687 whether the server is hibernating.
3690 Changes in version 0.0.9.6 - 2005-03-24
3691 o Bugfixes on 0.0.9.x (crashes and asserts):
3692 - Add new end stream reasons to maintainance branch. Fix bug where
3693 reason (8) could trigger an assert. Prevent bug from recurring.
3694 - Apparently win32 stat wants paths to not end with a slash.
3695 - Fix assert triggers in assert_cpath_layer_ok(), where we were
3696 blowing away the circuit that conn->cpath_layer points to, then
3697 checking to see if the circ is well-formed. Backport check to make
3698 sure we dont use the cpath on a closed connection.
3699 - Prevent circuit_resume_edge_reading_helper() from trying to package
3700 inbufs for marked-for-close streams.
3701 - Don't crash on hup if your options->address has become unresolvable.
3702 - Some systems (like OS X) sometimes accept() a connection and tell
3703 you the remote host is 0.0.0.0:0. If this happens, due to some
3704 other mis-features, we get confused; so refuse the conn for now.
3706 o Bugfixes on 0.0.9.x (other):
3707 - Fix harmless but scary "Unrecognized content encoding" warn message.
3708 - Add new stream error reason: TORPROTOCOL reason means "you are not
3709 speaking a version of Tor I understand; say bye-bye to your stream."
3710 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
3711 into the future, now that we are more tolerant of skew. This
3712 resolves a bug where a Tor server would refuse to cache a directory
3713 because all the directories it gets are too far in the future;
3714 yet the Tor server never logs any complaints about clock skew.
3715 - Mac packaging magic: make man pages useable, and do not overwrite
3716 existing torrc files.
3717 - Make OS X log happily to /var/log/tor/tor.log
3720 Changes in version 0.0.9.5 - 2005-02-22
3721 o Bugfixes on 0.0.9.x:
3722 - Fix an assert race at exit nodes when resolve requests fail.
3723 - Stop picking unverified dir mirrors--it only leads to misery.
3724 - Patch from Matt Edman to make NT services work better. Service
3725 support is still not compiled into the executable by default.
3726 - Patch from Dmitri Bely so the Tor service runs better under
3727 the win32 SYSTEM account.
3728 - Make tor-resolve actually work (?) on Win32.
3729 - Fix a sign bug when getrlimit claims to have 4+ billion
3730 file descriptors available.
3731 - Stop refusing to start when bandwidthburst == bandwidthrate.
3732 - When create cells have been on the onion queue more than five
3733 seconds, just send back a destroy and take them off the list.
3736 Changes in version 0.0.9.4 - 2005-02-03
3737 o Bugfixes on 0.0.9:
3738 - Fix an assert bug that took down most of our servers: when
3739 a server claims to have 1 GB of bandwidthburst, don't
3741 - Don't crash as badly if we have spawned the max allowed number
3742 of dnsworkers, or we're out of file descriptors.
3743 - Block more file-sharing ports in the default exit policy.
3744 - MaxConn is now automatically set to the hard limit of max
3745 file descriptors we're allowed (ulimit -n), minus a few for
3747 - Give a clearer message when servers need to raise their
3748 ulimit -n when they start running out of file descriptors.
3749 - SGI Compatibility patches from Jan Schaumann.
3750 - Tolerate a corrupt cached directory better.
3751 - When a dirserver hasn't approved your server, list which one.
3752 - Go into soft hibernation after 95% of the bandwidth is used,
3753 not 99%. This is especially important for daily hibernators who
3754 have a small accounting max. Hopefully it will result in fewer
3755 cut connections when the hard hibernation starts.
3756 - Load-balance better when using servers that claim more than
3757 800kB/s of capacity.
3758 - Make NT services work (experimental, only used if compiled in).
3761 Changes in version 0.0.9.3 - 2005-01-21
3762 o Bugfixes on 0.0.9:
3763 - Backport the cpu use fixes from main branch, so busy servers won't
3764 need as much processor time.
3765 - Work better when we go offline and then come back, or when we
3766 run Tor at boot before the network is up. We do this by
3767 optimistically trying to fetch a new directory whenever an
3768 application request comes in and we think we're offline -- the
3769 human is hopefully a good measure of when the network is back.
3770 - Backport some minimal hidserv bugfixes: keep rend circuits open as
3771 long as you keep using them; actually publish hidserv descriptors
3772 shortly after they change, rather than waiting 20-40 minutes.
3773 - Enable Mac startup script by default.
3774 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
3775 - When you update AllowUnverifiedNodes or FirewallPorts via the
3776 controller's setconf feature, we were always appending, never
3778 - When you update HiddenServiceDir via setconf, it was screwing up
3779 the order of reading the lines, making it fail.
3780 - Do not rewrite a cached directory back to the cache; otherwise we
3781 will think it is recent and not fetch a newer one on startup.
3782 - Workaround for webservers that lie about Content-Encoding: Tor
3783 now tries to autodetect compressed directories and compression
3784 itself. This lets us Proxypass dir fetches through apache.
3787 Changes in version 0.0.9.2 - 2005-01-04
3788 o Bugfixes on 0.0.9 (crashes and asserts):
3789 - Fix an assert on startup when the disk is full and you're logging
3791 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
3792 style address, then we'd crash.
3793 - Fix an assert trigger when the running-routers string we get from
3794 a dirserver is broken.
3795 - Make worker threads start and run on win32. Now win32 servers
3797 - Bandaid (not actually fix, but now it doesn't crash) an assert
3798 where the dns worker dies mysteriously and the main Tor process
3799 doesn't remember anything about the address it was resolving.
3801 o Bugfixes on 0.0.9 (Win32):
3802 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
3803 name out of the warning/assert messages.
3804 - Fix a superficial "unhandled error on read" bug on win32.
3805 - The win32 installer no longer requires a click-through for our
3806 license, since our Free Software license grants rights but does not
3808 - Win32: When connecting to a dirserver fails, try another one
3809 immediately. (This was already working for non-win32 Tors.)
3810 - Stop trying to parse $HOME on win32 when hunting for default
3812 - Make tor-resolve.c work on win32 by calling network_init().
3814 o Bugfixes on 0.0.9 (other):
3815 - Make 0.0.9.x build on Solaris again.
3816 - Due to a fencepost error, we were blowing away the \n when reporting
3817 confvalue items in the controller. So asking for multiple config
3818 values at once couldn't work.
3819 - When listing circuits that are pending on an opening OR connection,
3820 if we're an OR we were listing circuits that *end* at us as
3821 being pending on every listener, dns/cpu worker, etc. Stop that.
3822 - Dirservers were failing to create 'running-routers' or 'directory'
3823 strings if we had more than some threshold of routers. Fix them so
3824 they can handle any number of routers.
3825 - Fix a superficial "Duplicate mark for close" bug.
3826 - Stop checking for clock skew for OR connections, even for servers.
3827 - Fix a fencepost error that was chopping off the last letter of any
3828 nickname that is the maximum allowed nickname length.
3829 - Update URLs in log messages so they point to the new website.
3830 - Fix a potential problem in mangling server private keys while
3831 writing to disk (not triggered yet, as far as we know).
3832 - Include the licenses for other free software we include in Tor,
3833 now that we're shipping binary distributions more regularly.
3836 Changes in version 0.0.9.1 - 2004-12-15
3837 o Bugfixes on 0.0.9:
3838 - Make hibernation actually work.
3839 - Make HashedControlPassword config option work.
3840 - When we're reporting event circuit status to a controller,
3841 don't use the stream status code.
3844 Changes in version 0.0.9 - 2004-12-12
3846 - Clean up manpage and torrc.sample file.
3847 - Clean up severities and text of log warnings.
3849 - Make servers trigger an assert when they enter hibernation.
3852 Changes in version 0.0.9rc7 - 2004-12-08
3853 o Bugfixes on 0.0.9rc:
3854 - Fix a stack-trashing crash when an exit node begins hibernating.
3855 - Avoid looking at unallocated memory while considering which
3856 ports we need to build circuits to cover.
3857 - Stop a sigpipe: when an 'end' cell races with eof from the app,
3858 we shouldn't hold-open-until-flush if the eof arrived first.
3859 - Fix a bug with init_cookie_authentication() in the controller.
3860 - When recommending new-format log lines, if the upper bound is
3861 LOG_ERR, leave it implicit.
3863 o Bugfixes on 0.0.8.1:
3864 - Fix a whole slew of memory leaks.
3865 - Fix isspace() and friends so they still make Solaris happy
3866 but also so they don't trigger asserts on win32.
3867 - Fix parse_iso_time on platforms without strptime (eg win32).
3868 - win32: tolerate extra "readable" events better.
3869 - win32: when being multithreaded, leave parent fdarray open.
3870 - Make unit tests work on win32.
3873 Changes in version 0.0.9rc6 - 2004-12-06
3874 o Bugfixes on 0.0.9pre:
3875 - Clean up some more integer underflow opportunities (not exploitable
3877 - While hibernating, hup should not regrow our listeners.
3878 - Send an end to the streams we close when we hibernate, rather
3879 than just chopping them off.
3880 - React to eof immediately on non-open edge connections.
3882 o Bugfixes on 0.0.8.1:
3883 - Calculate timeout for waiting for a connected cell from the time
3884 we sent the begin cell, not from the time the stream started. If
3885 it took a long time to establish the circuit, we would time out
3886 right after sending the begin cell.
3887 - Fix router_compare_addr_to_addr_policy: it was not treating a port
3888 of * as always matching, so we were picking reject *:* nodes as
3889 exit nodes too. Oops.
3892 - New circuit building strategy: keep a list of ports that we've
3893 used in the past 6 hours, and always try to have 2 circuits open
3894 or on the way that will handle each such port. Seed us with port
3895 80 so web users won't complain that Tor is "slow to start up".
3896 - Make kill -USR1 dump more useful stats about circuits.
3897 - When warning about retrying or giving up, print the address, so
3898 the user knows which one it's talking about.
3899 - If you haven't used a clean circuit in an hour, throw it away,
3900 just to be on the safe side. (This means after 6 hours a totally
3901 unused Tor client will have no circuits open.)
3904 Changes in version 0.0.9rc5 - 2004-12-01
3905 o Bugfixes on 0.0.8.1:
3906 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
3907 - Let resolve conns retry/expire also, rather than sticking around
3909 - If we are using select, make sure we stay within FD_SETSIZE.
3911 o Bugfixes on 0.0.9pre:
3912 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
3913 but doesn't seem to be currently; thanks to Ilja van Sprundel for
3915 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
3916 instead. Impose minima and maxima for all *Period options; impose
3917 even tighter maxima for fetching if we are a caching dirserver.
3918 Clip rather than rejecting.
3919 - Fetch cached running-routers from servers that serve it (that is,
3920 authdirservers and servers running 0.0.9rc5-cvs or later.)
3923 - Accept *:706 (silc) in default exit policy.
3924 - Implement new versioning format for post 0.1.
3925 - Support "foo.nickname.exit" addresses, to let Alice request the
3926 address "foo" as viewed by exit node "nickname". Based on a patch
3928 - Make tor --version --version dump the cvs Id of every file.
3931 Changes in version 0.0.9rc4 - 2004-11-28
3932 o Bugfixes on 0.0.8.1:
3933 - Make windows sockets actually non-blocking (oops), and handle
3934 win32 socket errors better.
3936 o Bugfixes on 0.0.9rc1:
3937 - Actually catch the -USR2 signal.
3940 Changes in version 0.0.9rc3 - 2004-11-25
3941 o Bugfixes on 0.0.8.1:
3942 - Flush the log file descriptor after we print "Tor opening log file",
3943 so we don't see those messages days later.
3945 o Bugfixes on 0.0.9rc1:
3946 - Make tor-resolve work again.
3947 - Avoid infinite loop in tor-resolve if tor hangs up on it.
3948 - Fix an assert trigger for clients/servers handling resolves.
3951 Changes in version 0.0.9rc2 - 2004-11-24
3952 o Bugfixes on 0.0.9rc1:
3953 - I broke socks5 support while fixing the eof bug.
3954 - Allow unitless bandwidths and intervals; they default to bytes
3956 - New servers don't start out hibernating; they are active until
3957 they run out of bytes, so they have a better estimate of how
3958 long it takes, and so their operators can know they're working.
3961 Changes in version 0.0.9rc1 - 2004-11-23
3962 o Bugfixes on 0.0.8.1:
3963 - Finally fix a bug that's been plaguing us for a year:
3964 With high load, circuit package window was reaching 0. Whenever
3965 we got a circuit-level sendme, we were reading a lot on each
3966 socket, but only writing out a bit. So we would eventually reach
3967 eof. This would be noticed and acted on even when there were still
3968 bytes sitting in the inbuf.
3969 - When poll() is interrupted, we shouldn't believe the revents values.
3971 o Bugfixes on 0.0.9pre6:
3972 - Fix hibernate bug that caused pre6 to be broken.
3973 - Don't keep rephist info for routers that haven't had activity for
3974 24 hours. (This matters now that clients have keys, since we track
3976 - Never call close_temp_logs while validating log options.
3977 - Fix backslash-escaping on tor.sh.in and torctl.in.
3980 - Implement weekly/monthly/daily accounting: now you specify your
3981 hibernation properties by
3982 AccountingMax N bytes|KB|MB|GB|TB
3983 AccountingStart day|week|month [day] HH:MM
3984 Defaults to "month 1 0:00".
3985 - Let bandwidth and interval config options be specified as 5 bytes,
3986 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
3987 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
3988 get back to normal.)
3989 - If your requested entry or exit node has advertised bandwidth 0,
3991 - Be more greedy about filling up relay cells -- we try reading again
3992 once we've processed the stuff we read, in case enough has arrived
3993 to fill the last cell completely.
3994 - Apply NT service patch from Osamu Fujino. Still needs more work.
3997 Changes in version 0.0.9pre6 - 2004-11-15
3998 o Bugfixes on 0.0.8.1:
3999 - Fix assert failure on malformed socks4a requests.
4000 - Use identity comparison, not nickname comparison, to choose which
4001 half of circuit-ID-space each side gets to use. This is needed
4002 because sometimes we think of a router as a nickname, and sometimes
4003 as a hex ID, and we can't predict what the other side will do.
4004 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
4005 write() call will fail and we handle it there.
4006 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
4007 and smartlist_len, which are two major profiling offenders.
4009 o Bugfixes on 0.0.9pre5:
4010 - Fix a bug in read_all that was corrupting config files on windows.
4011 - When we're raising the max number of open file descriptors to
4012 'unlimited', don't log that we just raised it to '-1'.
4013 - Include event code with events, as required by control-spec.txt.
4014 - Don't give a fingerprint when clients do --list-fingerprint:
4015 it's misleading, because it will never be the same again.
4016 - Stop using strlcpy in tor_strndup, since it was slowing us
4018 - Remove warn on startup about missing cached-directory file.
4019 - Make kill -USR1 work again.
4020 - Hibernate if we start tor during the "wait for wakeup-time" phase
4021 of an accounting interval. Log our hibernation plans better.
4022 - Authoritative dirservers now also cache their directory, so they
4023 have it on start-up.
4026 - Fetch running-routers; cache running-routers; compress
4027 running-routers; serve compressed running-routers.z
4028 - Add NSI installer script contributed by J Doe.
4029 - Commit VC6 and VC7 workspace/project files.
4030 - Commit a tor.spec for making RPM files, with help from jbash.
4031 - Add contrib/torctl.in contributed by Glenn Fink.
4032 - Implement the control-spec's SAVECONF command, to write your
4033 configuration to torrc.
4034 - Get cookie authentication for the controller closer to working.
4035 - Include control-spec.txt in the tarball.
4036 - When set_conf changes our server descriptor, upload a new copy.
4037 But don't upload it too often if there are frequent changes.
4038 - Document authentication config in man page, and document signals
4040 - Clean up confusing parts of man page and torrc.sample.
4041 - Make expand_filename handle ~ and ~username.
4042 - Use autoconf to enable largefile support where necessary. Use
4043 ftello where available, since ftell can fail at 2GB.
4044 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
4045 log more informatively.
4046 - Give a slightly more useful output for "tor -h".
4047 - Refuse application socks connections to port 0.
4048 - Check clock skew for verified servers, but allow unverified
4049 servers and clients to have any clock skew.
4050 - Break DirFetchPostPeriod into:
4051 - DirFetchPeriod for fetching full directory,
4052 - StatusFetchPeriod for fetching running-routers,
4053 - DirPostPeriod for posting server descriptor,
4054 - RendPostPeriod for posting hidden service descriptors.
4055 - Make sure the hidden service descriptors are at a random offset
4056 from each other, to hinder linkability.
4059 Changes in version 0.0.9pre5 - 2004-11-09
4060 o Bugfixes on 0.0.9pre4:
4061 - Fix a seg fault in unit tests (doesn't affect main program).
4062 - Fix an assert bug where a hidden service provider would fail if
4063 the first hop of his rendezvous circuit was down.
4064 - Hidden service operators now correctly handle version 1 style
4065 INTRODUCE1 cells (nobody generates them still, so not a critical
4067 - If do_hup fails, actually notice.
4068 - Handle more errnos from accept() without closing the listener.
4069 Some OpenBSD machines were closing their listeners because
4070 they ran out of file descriptors.
4071 - Send resolve cells to exit routers that are running a new
4072 enough version of the resolve code to work right.
4073 - Better handling of winsock includes on non-MSV win32 compilers.
4074 - Some people had wrapped their tor client/server in a script
4075 that would restart it whenever it died. This did not play well
4076 with our "shut down if your version is obsolete" code. Now people
4077 don't fetch a new directory if their local cached version is
4079 - Make our autogen.sh work on ksh as well as bash.
4082 - Hibernation: New config option "AccountingMaxKB" lets you
4083 set how many KBytes per month you want to allow your server to
4084 consume. Rather than spreading those bytes out evenly over the
4085 month, we instead hibernate for some of the month and pop up
4086 at a deterministic time, work until the bytes are consumed, then
4087 hibernate again. Config option "MonthlyAccountingStart" lets you
4088 specify which day of the month your billing cycle starts on.
4089 - Control interface: a separate program can now talk to your
4090 client/server over a socket, and get/set config options, receive
4091 notifications of circuits and streams starting/finishing/dying,
4092 bandwidth used, etc. The next step is to get some GUIs working.
4093 Let us know if you want to help out. See doc/control-spec.txt .
4094 - Ship a contrib/tor-control.py as an example script to interact
4095 with the control port.
4096 - "tor --hash-password zzyxz" will output a salted password for
4097 use in authenticating to the control interface.
4098 - New log format in config:
4099 "Log minsev[-maxsev] stdout|stderr|syslog" or
4100 "Log minsev[-maxsev] file /var/foo"
4103 - DirPolicy config option, to let people reject incoming addresses
4104 from their dirserver.
4105 - "tor --list-fingerprint" will list your identity key fingerprint
4107 - Add "pass" target for RedirectExit, to make it easier to break
4108 out of a sequence of RedirectExit rules.
4109 - Clients now generate a TLS cert too, in preparation for having
4110 them act more like real nodes.
4111 - Ship src/win32/ in the tarball, so people can use it to build.
4112 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
4114 - New "router-status" line in directory, to better bind each verified
4115 nickname to its identity key.
4116 - Deprecate unofficial config option abbreviations, and abbreviations
4117 not on the command line.
4118 - Add a pure-C tor-resolve implementation.
4119 - Use getrlimit and friends to ensure we can reach MaxConn (currently
4120 1024) file descriptors.
4122 o Code security improvements, inspired by Ilja:
4123 - Replace sprintf with snprintf. (I think they were all safe, but
4125 - Replace strcpy/strncpy with strlcpy in more places.
4126 - Avoid strcat; use snprintf or strlcat instead.
4127 - snprintf wrapper with consistent (though not C99) overflow behavior.
4130 Changes in version 0.0.9pre4 - 2004-10-17
4131 o Bugfixes on 0.0.9pre3:
4132 - If the server doesn't specify an exit policy, use the real default
4133 exit policy, not reject *:*.
4134 - Ignore fascistfirewall when uploading/downloading hidden service
4135 descriptors, since we go through Tor for those; and when using
4136 an HttpProxy, since we assume it can reach them all.
4137 - When looking for an authoritative dirserver, use only the ones
4138 configured at boot. Don't bother looking in the directory.
4139 - The rest of the fix for get_default_conf_file() on older win32.
4140 - Make 'Routerfile' config option obsolete.
4143 - New 'MyFamily nick1,...' config option for a server to
4144 specify other servers that shouldn't be used in the same circuit
4145 with it. Only believed if nick1 also specifies us.
4146 - New 'NodeFamily nick1,nick2,...' config option for a client to
4147 specify nodes that it doesn't want to use in the same circuit.
4148 - New 'Redirectexit pattern address:port' config option for a
4149 server to redirect exit connections, e.g. to a local squid.
4152 Changes in version 0.0.9pre3 - 2004-10-13
4153 o Bugfixes on 0.0.8.1:
4154 - Better torrc example lines for dirbindaddress and orbindaddress.
4155 - Improved bounds checking on parsed ints (e.g. config options and
4156 the ones we find in directories.)
4157 - Better handling of size_t vs int, so we're more robust on 64
4159 - Fix the rest of the bug where a newly started OR would appear
4160 as unverified even after we've added his fingerprint and hupped
4162 - Fix a bug from 0.0.7: when read() failed on a stream, we would
4163 close it without sending back an end. So 'connection refused'
4164 would simply be ignored and the user would get no response.
4166 o Bugfixes on 0.0.9pre2:
4167 - Serving the cached-on-disk directory to people is bad. We now
4168 provide no directory until we've fetched a fresh one.
4169 - Workaround for bug on windows where cached-directories get crlf
4171 - Make get_default_conf_file() work on older windows too.
4172 - If we write a *:* exit policy line in the descriptor, don't write
4173 any more exit policy lines.
4176 - Use only 0.0.9pre1 and later servers for resolve cells.
4177 - Make the dirservers file obsolete.
4178 - Include a dir-signing-key token in directories to tell the
4179 parsing entity which key is being used to sign.
4180 - Remove the built-in bulky default dirservers string.
4181 - New config option "Dirserver %s:%d [fingerprint]", which can be
4182 repeated as many times as needed. If no dirservers specified,
4183 default to moria1,moria2,tor26.
4184 - Make moria2 advertise a dirport of 80, so people behind firewalls
4185 will be able to get a directory.
4186 - Http proxy support
4187 - Dirservers translate requests for http://%s:%d/x to /x
4188 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
4189 be routed through this host.
4190 - Clients ask for /tor/x rather than /x for new enough dirservers.
4191 This way we can one day coexist peacefully with apache.
4192 - Clients specify a "Host: %s%d" http header, to be compatible
4193 with more proxies, and so running squid on an exit node can work.
4196 Changes in version 0.0.8.1 - 2004-10-13
4198 - Fix a seg fault that can be triggered remotely for Tor
4199 clients/servers with an open dirport.
4200 - Fix a rare assert trigger, where routerinfos for entries in
4201 our cpath would expire while we're building the path.
4202 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4203 - Fix a rare seg fault for people running hidden services on
4204 intermittent connections.
4205 - Fix a bug in parsing opt keywords with objects.
4206 - Fix a stale pointer assert bug when a stream detaches and
4208 - Fix a string format vulnerability (probably not exploitable)
4209 in reporting stats locally.
4210 - Fix an assert trigger: sometimes launching circuits can fail
4211 immediately, e.g. because too many circuits have failed recently.
4212 - Fix a compile warning on 64 bit platforms.
4215 Changes in version 0.0.9pre2 - 2004-10-03
4217 - Make fetching a cached directory work for 64-bit platforms too.
4218 - Make zlib.h a required header, not an optional header.
4221 Changes in version 0.0.9pre1 - 2004-10-01
4223 - Stop using separate defaults for no-config-file and
4224 empty-config-file. Now you have to explicitly turn off SocksPort,
4225 if you don't want it open.
4226 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4227 - Improve man page to mention more of the 0.0.8 features.
4228 - Fix a rare seg fault for people running hidden services on
4229 intermittent connections.
4230 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
4232 - Fix more dns related bugs: send back resolve_failed and end cells
4233 more reliably when the resolve fails, rather than closing the
4234 circuit and then trying to send the cell. Also attach dummy resolve
4235 connections to a circuit *before* calling dns_resolve(), to fix
4236 a bug where cached answers would never be sent in RESOLVED cells.
4237 - When we run out of disk space, or other log writing error, don't
4238 crash. Just stop logging to that log and continue.
4239 - We were starting to daemonize before we opened our logs, so if
4240 there were any problems opening logs, we would complain to stderr,
4241 which wouldn't work, and then mysteriously exit.
4242 - Fix a rare bug where sometimes a verified OR would connect to us
4243 before he'd uploaded his descriptor, which would cause us to
4244 assign conn->nickname as though he's unverified. Now we look through
4245 the fingerprint list to see if he's there.
4246 - Fix a rare assert trigger, where routerinfos for entries in
4247 our cpath would expire while we're building the path.
4250 - Clients can ask dirservers for /dir.z to get a compressed version
4251 of the directory. Only works for servers running 0.0.9, of course.
4252 - Make clients cache directories and use them to seed their router
4253 lists at startup. This means clients have a datadir again.
4254 - Configuration infrastructure support for warning on obsolete
4256 - Respond to content-encoding headers by trying to uncompress as
4258 - Reply with a deflated directory when a client asks for "dir.z".
4259 We could use allow-encodings instead, but allow-encodings isn't
4260 specified in HTTP 1.0.
4261 - Raise the max dns workers from 50 to 100.
4262 - Discourage people from setting their dirfetchpostperiod more often
4263 than once per minute.
4264 - Protect dirservers from overzealous descriptor uploading -- wait
4265 10 seconds after directory gets dirty, before regenerating.
4268 Changes in version 0.0.8 - 2004-08-25
4269 o Port it to SunOS 5.9 / Athena
4272 Changes in version 0.0.8rc2 - 2004-08-20
4273 o Make it compile on cygwin again.
4274 o When picking unverified routers, skip those with low uptime and/or
4275 low bandwidth, depending on what properties you care about.
4278 Changes in version 0.0.8rc1 - 2004-08-18
4279 o Changes from 0.0.7.3:
4281 - Fix assert triggers: if the other side returns an address 0.0.0.0,
4282 don't put it into the client dns cache.
4283 - If a begin failed due to exit policy, but we believe the IP address
4284 should have been allowed, switch that router to exitpolicy reject *:*
4285 until we get our next directory.
4287 - Clients choose nodes proportional to advertised bandwidth.
4288 - Avoid using nodes with low uptime as introduction points.
4289 - Handle servers with dynamic IP addresses: don't replace
4290 options->Address with the resolved one at startup, and
4291 detect our address right before we make a routerinfo each time.
4292 - 'FascistFirewall' option to pick dirservers and ORs on specific
4293 ports; plus 'FirewallPorts' config option to tell FascistFirewall
4294 which ports are open. (Defaults to 80,443)
4295 - Be more aggressive about trying to make circuits when the network
4296 has changed (e.g. when you unsuspend your laptop).
4297 - Check for time skew on http headers; report date in response to
4299 - If the entrynode config line has only one node, don't pick it as
4301 - Add strict{entry|exit}nodes config options. If set to 1, then
4302 we refuse to build circuits that don't include the specified entry
4304 - OutboundBindAddress config option, to bind to a specific
4305 IP address for outgoing connect()s.
4306 - End truncated log entries (e.g. directories) with "[truncated]".
4308 o Patches to 0.0.8preX:
4310 - Patches to compile and run on win32 again (maybe)?
4311 - Fix crash when looking for ~/.torrc with no $HOME set.
4312 - Fix a race bug in the unit tests.
4313 - Handle verified/unverified name collisions better when new
4314 routerinfo's arrive in a directory.
4315 - Sometimes routers were getting entered into the stats before
4316 we'd assigned their identity_digest. Oops.
4317 - Only pick and establish intro points after we've gotten a
4320 - AllowUnverifiedNodes config option to let circuits choose no-name
4321 routers in entry,middle,exit,introduction,rendezvous positions.
4322 Allow middle and rendezvous positions by default.
4323 - Add a man page for tor-resolve.
4326 Changes in version 0.0.7.3 - 2004-08-12
4327 o Stop dnsworkers from triggering an assert failure when you
4328 ask them to resolve the host "".
4331 Changes in version 0.0.8pre3 - 2004-08-09
4332 o Changes from 0.0.7.2:
4333 - Allow multiple ORs with same nickname in routerlist -- now when
4334 people give us one identity key for a nickname, then later
4335 another, we don't constantly complain until the first expires.
4336 - Remember used bandwidth (both in and out), and publish 15-minute
4337 snapshots for the past day into our descriptor.
4338 - You can now fetch $DIRURL/running-routers to get just the
4339 running-routers line, not the whole descriptor list. (But
4340 clients don't use this yet.)
4341 - When people mistakenly use Tor as an http proxy, point them
4342 at the tor-doc.html rather than the INSTALL.
4343 - Remove our mostly unused -- and broken -- hex_encode()
4344 function. Use base16_encode() instead. (Thanks to Timo Lindfors
4345 for pointing out this bug.)
4346 - Rotate onion keys every 12 hours, not every 2 hours, so we have
4347 fewer problems with people using the wrong key.
4348 - Change the default exit policy to reject the default edonkey,
4349 kazaa, gnutella ports.
4350 - Add replace_file() to util.[ch] to handle win32's rename().
4352 o Changes from 0.0.8preX:
4353 - Fix two bugs in saving onion keys to disk when rotating, so
4354 hopefully we'll get fewer people using old onion keys.
4355 - Fix an assert error that was making SocksPolicy not work.
4356 - Be willing to expire routers that have an open dirport -- it's
4357 just the authoritative dirservers we want to not forget.
4358 - Reject tor-resolve requests for .onion addresses early, so we
4359 don't build a whole rendezvous circuit and then fail.
4360 - When you're warning a server that he's unverified, don't cry
4362 - Fix a race condition: don't try to extend onto a connection
4363 that's still handshaking.
4364 - For servers in clique mode, require the conn to be open before
4365 you'll choose it for your path.
4366 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
4367 end relay cell, etc.
4368 - Measure bandwidth capacity over the last 24 hours, not just 12
4369 - Bugfix: authoritative dirservers were making and signing a new
4370 directory for each client, rather than reusing the cached one.
4373 Changes in version 0.0.8pre2 - 2004-08-04
4374 o Changes from 0.0.7.2:
4376 - Check directory signature _before_ you decide whether you're
4377 you're running an obsolete version and should exit.
4378 - Check directory signature _before_ you parse the running-routers
4379 list to decide who's running or verified.
4380 - Bugfixes and features:
4381 - Check return value of fclose while writing to disk, so we don't
4382 end up with broken files when servers run out of disk space.
4383 - Log a warning if the user uses an unsafe socks variant, so people
4384 are more likely to learn about privoxy or socat.
4385 - Dirservers now include RFC1123-style dates in the HTTP headers,
4386 which one day we will use to better detect clock skew.
4388 o Changes from 0.0.8pre1:
4389 - Make it compile without warnings again on win32.
4390 - Log a warning if you're running an unverified server, to let you
4391 know you might want to get it verified.
4392 - Only pick a default nickname if you plan to be a server.
4395 Changes in version 0.0.8pre1 - 2004-07-23
4397 - Made our unit tests compile again on OpenBSD 3.5, and tor
4398 itself compile again on OpenBSD on a sparc64.
4399 - We were neglecting milliseconds when logging on win32, so
4400 everything appeared to happen at the beginning of each second.
4403 - 'Extend' relay cell payloads now include the digest of the
4404 intended next hop's identity key. Now we can verify that we're
4405 extending to the right router, and also extend to routers we
4406 hadn't heard of before.
4409 - Tor nodes can now act as relays (with an advertised ORPort)
4410 without being manually verified by the dirserver operators.
4411 - Uploaded descriptors of unverified routers are now accepted
4412 by the dirservers, and included in the directory.
4413 - Verified routers are listed by nickname in the running-routers
4414 list; unverified routers are listed as "$<fingerprint>".
4415 - We now use hash-of-identity-key in most places rather than
4416 nickname or addr:port, for improved security/flexibility.
4417 - To avoid Sybil attacks, paths still use only verified servers.
4418 But now we have a chance to play around with hybrid approaches.
4419 - Nodes track bandwidth usage to estimate capacity (not used yet).
4420 - ClientOnly option for nodes that never want to become servers.
4421 - Directory caching.
4422 - "AuthoritativeDir 1" option for the official dirservers.
4423 - Now other nodes (clients and servers) will cache the latest
4424 directory they've pulled down.
4425 - They can enable their DirPort to serve it to others.
4426 - Clients will pull down a directory from any node with an open
4427 DirPort, and check the signature/timestamp correctly.
4428 - Authoritative dirservers now fetch directories from other
4429 authdirservers, to stay better synced.
4430 - Running-routers list tells who's down also, along with noting
4431 if they're verified (listed by nickname) or unverified (listed
4433 - Allow dirservers to serve running-router list separately.
4434 This isn't used yet.
4435 - ORs connect-on-demand to other ORs
4436 - If you get an extend cell to an OR you're not connected to,
4437 connect, handshake, and forward the create cell.
4438 - The authoritative dirservers stay connected to everybody,
4439 and everybody stays connected to 0.0.7 servers, but otherwise
4440 clients/servers expire unused connections after 5 minutes.
4441 - When servers get a sigint, they delay 30 seconds (refusing new
4442 connections) then exit. A second sigint causes immediate exit.
4443 - File and name management:
4444 - Look for .torrc if no CONFDIR "torrc" is found.
4445 - If no datadir is defined, then choose, make, and secure ~/.tor
4447 - If torrc not found, exitpolicy reject *:*.
4448 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
4449 - If no nickname is defined, derive default from hostname.
4450 - Rename secret key files, e.g. identity.key -> secret_id_key,
4451 to discourage people from mailing their identity key to tor-ops.
4452 - Refuse to build a circuit before the directory has arrived --
4453 it won't work anyway, since you won't know the right onion keys
4455 - Try other dirservers immediately if the one you try is down. This
4456 should tolerate down dirservers better now.
4457 - Parse tor version numbers so we can do an is-newer-than check
4458 rather than an is-in-the-list check.
4459 - New socks command 'resolve', to let us shim gethostbyname()
4461 - A 'tor_resolve' script to access the socks resolve functionality.
4462 - A new socks-extensions.txt doc file to describe our
4463 interpretation and extensions to the socks protocols.
4464 - Add a ContactInfo option, which gets published in descriptor.
4465 - Publish OR uptime in descriptor (and thus in directory) too.
4466 - Write tor version at the top of each log file
4467 - New docs in the tarball:
4469 - Document that you should proxy your SSL traffic too.
4472 Changes in version 0.0.7.2 - 2004-07-07
4473 o A better fix for the 0.0.0.0 problem, that will hopefully
4474 eliminate the remaining related assertion failures.
4477 Changes in version 0.0.7.1 - 2004-07-04
4478 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
4479 since internally we use 0.0.0.0 to signify "not yet resolved".
4482 Changes in version 0.0.7 - 2004-06-07
4483 o Updated the man page to reflect the new features.
4486 Changes in version 0.0.7rc2 - 2004-06-06
4487 o Changes from 0.0.7rc1:
4488 - Make it build on Win32 again.
4489 o Changes from 0.0.6.2:
4490 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
4494 Changes in version 0.0.7rc1 - 2004-06-02
4496 - On sighup, we were adding another log without removing the first
4497 one. So log messages would get duplicated n times for n sighups.
4498 - Several cases of using a connection after we'd freed it. The
4499 problem was that connections that are pending resolve are in both
4500 the pending_resolve tree, and also the circuit's resolving_streams
4501 list. When you want to remove one, you must remove it from both.
4502 - Fix a double-mark-for-close where an end cell arrived for a
4503 resolving stream, and then the resolve failed.
4504 - Check directory signatures based on name of signer, not on whom
4505 we got the directory from. This will let us cache directories more
4508 - Crank up some of our constants to handle more users.
4511 Changes in version 0.0.7pre1 - 2004-06-02
4512 o Fixes for crashes and other obnoxious bugs:
4513 - Fix an epipe bug: sometimes when directory connections failed
4514 to connect, we would give them a chance to flush before closing
4516 - When we detached from a circuit because of resolvefailed, we
4517 would immediately try the same circuit twice more, and then
4518 give up on the resolve thinking we'd tried three different
4520 - Limit the number of intro circuits we'll attempt to build for a
4521 hidden service per 15-minute period.
4522 - Check recommended-software string *early*, before actually parsing
4523 the directory. Thus we can detect an obsolete version and exit,
4524 even if the new directory format doesn't parse.
4525 o Fixes for security bugs:
4526 - Remember which nodes are dirservers when you startup, and if a
4527 random OR enables his dirport, don't automatically assume he's
4528 a trusted dirserver.
4530 - Directory connections were asking the wrong poll socket to
4531 start writing, and not asking themselves to start writing.
4532 - When we detached from a circuit because we sent a begin but
4533 didn't get a connected, we would use it again the first time;
4534 but after that we would correctly switch to a different one.
4535 - Stop warning when the first onion decrypt attempt fails; they
4536 will sometimes legitimately fail now that we rotate keys.
4537 - Override unaligned-access-ok check when $host_cpu is ia64 or
4538 arm. Apparently they allow it but the kernel whines.
4539 - Dirservers try to reconnect periodically too, in case connections
4541 - Fix some memory leaks in directory servers.
4542 - Allow backslash in Win32 filenames.
4543 - Made Tor build complain-free on FreeBSD, hopefully without
4544 breaking other BSD builds. We'll see.
4546 - Doxygen markup on all functions and global variables.
4547 - Make directory functions update routerlist, not replace it. So
4548 now directory disagreements are not so critical a problem.
4549 - Remove the upper limit on number of descriptors in a dirserver's
4550 directory (not that we were anywhere close).
4551 - Allow multiple logfiles at different severity ranges.
4552 - Allow *BindAddress to specify ":port" rather than setting *Port
4553 separately. Allow multiple instances of each BindAddress config
4554 option, so you can bind to multiple interfaces if you want.
4555 - Allow multiple exit policy lines, which are processed in order.
4556 Now we don't need that huge line with all the commas in it.
4557 - Enable accept/reject policies on SOCKS connections, so you can bind
4558 to 0.0.0.0 but still control who can use your OP.
4561 Changes in version 0.0.6.2 - 2004-05-16
4562 o Our integrity-checking digest was checking only the most recent cell,
4563 not the previous cells like we'd thought.
4564 Thanks to Stefan Mark for finding the flaw!
4567 Changes in version 0.0.6.1 - 2004-05-06
4568 o Fix two bugs in our AES counter-mode implementation (this affected
4569 onion-level stream encryption, but not TLS-level). It turns
4570 out we were doing something much more akin to a 16-character
4571 polyalphabetic cipher. Oops.
4572 Thanks to Stefan Mark for finding the flaw!
4573 o Retire moria3 as a directory server, and add tor26 as a directory
4577 Changes in version 0.0.6 - 2004-05-02
4581 Changes in version 0.0.6rc4 - 2004-05-01
4582 o Update the built-in dirservers list to use the new directory format
4583 o Fix a rare seg fault: if a node offering a hidden service attempts
4584 to build a circuit to Alice's rendezvous point and fails before it
4585 reaches the last hop, it retries with a different circuit, but
4587 o Handle windows socket errors correctly.
4590 Changes in version 0.0.6rc3 - 2004-04-28
4591 o Don't expire non-general excess circuits (if we had enough
4592 circuits open, we were expiring rendezvous circuits -- even
4593 when they had a stream attached. oops.)
4594 o Fetch randomness from /dev/urandom better (not via fopen/fread)
4595 o Better debugging for tls errors
4596 o Some versions of openssl have an SSL_pending function that erroneously
4597 returns bytes when there is a non-application record pending.
4598 o Set Content-Type on the directory and hidserv descriptor.
4599 o Remove IVs from cipher code, since AES-ctr has none.
4600 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
4601 o We were using an array of length zero in a few places.
4602 o win32's gethostbyname can't resolve an IP to an IP.
4603 o win32's close can't close a socket.
4606 Changes in version 0.0.6rc2 - 2004-04-26
4607 o Fix a bug where we were closing tls connections intermittently.
4608 It turns out openssl keeps its errors around -- so if an error
4609 happens, and you don't ask about it, and then another openssl
4610 operation happens and succeeds, and you ask if there was an error,
4611 it tells you about the first error. Fun fun.
4612 o Fix a bug that's been lurking since 27 may 03 (!)
4613 When passing back a destroy cell, we would use the wrong circ id.
4614 'Mostly harmless', but still worth fixing.
4615 o Since we don't support truncateds much, don't bother sending them;
4616 just close the circ.
4617 o check for <machine/limits.h> so we build on NetBSD again (I hope).
4618 o don't crash if a conn that sent a begin has suddenly lost its circuit
4619 (this was quite rare).
4622 Changes in version 0.0.6rc1 - 2004-04-25
4623 o We now rotate link (tls context) keys and onion keys.
4624 o CREATE cells now include oaep padding, so you can tell
4625 if you decrypted them correctly.
4626 o Add bandwidthburst to server descriptor.
4627 o Directories now say which dirserver signed them.
4628 o Use a tor_assert macro that logs failed assertions too.
4631 Changes in version 0.0.6pre5 - 2004-04-18
4632 o changes from 0.0.6pre4:
4633 - make tor build on broken freebsd 5.2 installs
4634 - fix a failed assert when you try an intro point, get a nack, and try
4635 a second one and it works.
4636 - when alice uses a port that the hidden service doesn't accept,
4637 it now sends back an end cell (denied by exit policy). otherwise
4638 alice would just have to wait to time out.
4639 - fix another rare bug: when we had tried all the intro
4640 points for a hidden service, we fetched the descriptor
4641 again, but we left our introcirc thinking it had already
4642 sent an intro, so it kept waiting for a response...
4643 - bugfix: when you sleep your hidden-service laptop, as soon
4644 as it wakes up it tries to upload a service descriptor, but
4645 socketpair fails for some reason (localhost not up yet?).
4646 now we simply give up on that upload, and we'll try again later.
4647 i'd still like to find the bug though.
4648 - if an intro circ waiting for an ack dies before getting one, then
4650 - we were reusing stale service descriptors and refetching usable
4654 Changes in version 0.0.6pre4 - 2004-04-14
4655 o changes from 0.0.6pre3:
4656 - when bob fails to connect to the rendezvous point, and his
4657 circ didn't fail because of the rendezvous point itself, then
4658 he retries a couple of times
4659 - we expire introduction and rendezvous circs more thoroughly
4660 (sometimes they were hanging around forever)
4661 - we expire unattached rendezvous streams that have been around
4662 too long (they were sticking around forever).
4663 - fix a measly fencepost error that was crashing everybody with
4667 Changes in version 0.0.6pre3 - 2004-04-14
4668 o changes from 0.0.6pre2:
4669 - make hup work again
4670 - fix some memory leaks for dirservers
4671 - allow more skew in rendezvous descriptor timestamps, to help
4672 handle people like blanu who don't know what time it is
4673 - normal circs are 3 hops, but some rend/intro circs are 4, if
4674 the initiator doesn't get to choose the last hop
4675 - send acks for introductions, so alice can know whether to try
4677 - bob publishes intro points more correctly
4678 o changes from 0.0.5:
4679 - fix an assert trigger that's been plaguing us since the days
4680 of 0.0.2prexx (thanks weasel!)
4681 - retry stream correctly when we fail to connect because of
4682 exit-policy-reject (should try another) or can't-resolve-address
4683 (also should try another, because dns on random internet servers
4685 - when we hup a dirserver and we've *removed* a server from the
4686 approved-routers list, now we remove that server from the
4687 in-memory directories too
4690 Changes in version 0.0.6pre2 - 2004-04-08
4691 o We fixed our base32 implementation. Now it works on all architectures.
4694 Changes in version 0.0.6pre1 - 2004-04-08
4696 - Hidden services and rendezvous points are implemented. Go to
4697 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
4698 hidden services. (This only works via a socks4a proxy such as
4699 Privoxy, and currently it's quite slow.)
4702 Changes in version 0.0.5 - 2004-03-30
4706 Changes in version 0.0.5rc3 - 2004-03-29
4707 o Install torrc as torrc.sample -- we no longer clobber your
4709 o Re-enable recommendedversion checking (we broke it in rc2, oops)
4710 o Add in a 'notice' log level for things the operator should hear
4711 but that aren't warnings
4714 Changes in version 0.0.5rc2 - 2004-03-29
4715 o Hold socks connection open until reply is flushed (if possible)
4716 o Make exit nodes resolve IPs to IPs immediately, rather than asking
4717 the dns farm to do it.
4718 o Fix c99 aliasing warnings in rephist.c
4719 o Don't include server descriptors that are older than 24 hours in the
4721 o Give socks 'reject' replies their whole 15s to attempt to flush,
4722 rather than seeing the 60s timeout and assuming the flush had failed.
4723 o Clean automake droppings from the cvs repository
4726 Changes in version 0.0.5rc1 - 2004-03-28
4727 o Fix mangled-state bug in directory fetching (was causing sigpipes).
4728 o Only build circuits after we've fetched the directory: clients were
4729 using only the directory servers before they'd fetched a directory.
4730 This also means longer startup time; so it goes.
4731 o Fix an assert trigger where an OP would fail to handshake, and we'd
4732 expect it to have a nickname.
4733 o Work around a tsocks bug: do a socks reject when AP connection dies
4734 early, else tsocks goes into an infinite loop.
4737 Changes in version 0.0.4 - 2004-03-26
4738 o When connecting to a dirserver or OR and the network is down,
4742 Changes in version 0.0.3 - 2004-03-26
4743 o Warn and fail if server chose a nickname with illegal characters
4744 o Port to Solaris and Sparc:
4745 - include missing header fcntl.h
4746 - have autoconf find -lsocket -lnsl automatically
4747 - deal with hardware word alignment
4748 - make uname() work (solaris has a different return convention)
4749 - switch from using signal() to sigaction()
4750 o Preliminary work on reputation system:
4751 - Keep statistics on success/fail of connect attempts; they're published
4752 by kill -USR1 currently.
4753 - Add a RunTesting option to try to learn link state by creating test
4754 circuits, even when SocksPort is off.
4755 - Remove unused open circuits when there are too many.
4758 Changes in version 0.0.2 - 2004-03-19
4759 - Include strlcpy and strlcat for safer string ops
4760 - define INADDR_NONE so we compile (but still not run) on solaris
4763 Changes in version 0.0.2pre27 - 2004-03-14
4765 - Allow internal tor networks (we were rejecting internal IPs,
4766 now we allow them if they're set explicitly).
4767 - And fix a few endian issues.
4770 Changes in version 0.0.2pre26 - 2004-03-14
4772 - If a stream times out after 15s without a connected cell, don't
4773 try that circuit again: try a new one.
4774 - Retry streams at most 4 times. Then give up.
4775 - When a dirserver gets a descriptor from an unknown router, it
4776 logs its fingerprint (so the dirserver operator can choose to
4777 accept it even without mail from the server operator).
4778 - Inform unapproved servers when we reject their descriptors.
4779 - Make tor build on Windows again. It works as a client, who knows
4781 - Clearer instructions in the torrc for how to set up a server.
4782 - Be more efficient about reading fd's when our global token bucket
4783 (used for rate limiting) becomes empty.
4785 - Stop asserting that computers always go forward in time. It's
4787 - When we sent a cell (e.g. destroy) and then marked an OR connection
4788 expired, we might close it before finishing a flush if the other
4789 side isn't reading right then.
4790 - Don't allow dirservers to start if they haven't defined
4792 - We were caching transient dns failures. Oops.
4793 - Prevent servers from publishing an internal IP as their address.
4794 - Address a strcat vulnerability in circuit.c
4797 Changes in version 0.0.2pre25 - 2004-03-04
4799 - Put the OR's IP in its router descriptor, not its fqdn. That way
4800 we'll stop being stalled by gethostbyname for nodes with flaky dns,
4803 - If the user typed in an address that didn't resolve, the server
4807 Changes in version 0.0.2pre24 - 2004-03-03
4809 - Fix an assertion failure in dns.c, where we were trying to dequeue
4810 a pending dns resolve even if it wasn't pending
4811 - Fix a spurious socks5 warning about still trying to write after the
4812 connection is finished.
4813 - Hold certain marked_for_close connections open until they're finished
4814 flushing, rather than losing bytes by closing them too early.
4815 - Correctly report the reason for ending a stream
4816 - Remove some duplicate calls to connection_mark_for_close
4817 - Put switch_id and start_daemon earlier in the boot sequence, so it
4818 will actually try to chdir() to options.DataDirectory
4819 - Make 'make test' exit(1) if a test fails; fix some unit tests
4820 - Make tor fail when you use a config option it doesn't know about,
4821 rather than warn and continue.
4822 - Make --version work
4823 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
4826 Changes in version 0.0.2pre23 - 2004-02-29
4828 - Print a statement when the first circ is finished, so the user
4830 - If a relay cell is unrecognized at the end of the circuit,
4831 send back a destroy. (So attacks to mutate cells are more
4833 - New config option 'excludenodes' to avoid certain nodes for circuits.
4834 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
4835 so you can collect coredumps there.
4837 - Fix a bug in tls flushing where sometimes data got wedged and
4838 didn't flush until more data got sent. Hopefully this bug was
4839 a big factor in the random delays we were seeing.
4840 - Make 'connected' cells include the resolved IP, so the client
4841 dns cache actually gets populated.
4842 - Disallow changing from ORPort=0 to ORPort>0 on hup.
4843 - When we time-out on a stream and detach from the circuit, send an
4844 end cell down it first.
4845 - Only warn about an unknown router (in exitnodes, entrynodes,
4846 excludenodes) after we've fetched a directory.
4849 Changes in version 0.0.2pre22 - 2004-02-26
4851 - Servers publish less revealing uname information in descriptors.
4852 - More memory tracking and assertions, to crash more usefully when
4854 - If the default torrc isn't there, just use some default defaults.
4855 Plus provide an internal dirservers file if they don't have one.
4856 - When the user tries to use Tor as an http proxy, give them an http
4857 501 failure explaining that we're a socks proxy.
4858 - Dump a new router.desc on hup, to help confused people who change
4859 their exit policies and then wonder why router.desc doesn't reflect
4861 - Clean up the generic tor.sh init script that we ship with.
4863 - If the exit stream is pending on the resolve, and a destroy arrives,
4864 then the stream wasn't getting removed from the pending list. I
4865 think this was the one causing recent server crashes.
4866 - Use a more robust poll on OSX 10.3, since their poll is flaky.
4867 - When it couldn't resolve any dirservers, it was useless from then on.
4868 Now it reloads the RouterFile (or default dirservers) if it has no
4870 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
4871 many users don't even *have* a /usr/local/sbin/.
4874 Changes in version 0.0.2pre21 - 2004-02-18
4876 - There's a ChangeLog file that actually reflects the changelog.
4877 - There's a 'torify' wrapper script, with an accompanying
4878 tor-tsocks.conf, that simplifies the process of using tsocks for
4879 tor. It even has a man page.
4880 - The tor binary gets installed to sbin rather than bin now.
4881 - Retry streams where the connected cell hasn't arrived in 15 seconds
4882 - Clean up exit policy handling -- get the default out of the torrc,
4883 so we can update it without forcing each server operator to fix
4885 - Allow imaps and pop3s in default exit policy
4887 - Prevent picking middleman nodes as the last node in the circuit
4890 Changes in version 0.0.2pre20 - 2004-01-30
4892 - We now have a deb package, and it's in debian unstable. Go to
4894 - I've split the TotalBandwidth option into BandwidthRate (how many
4895 bytes per second you want to allow, long-term) and
4896 BandwidthBurst (how many bytes you will allow at once before the cap
4897 kicks in). This better token bucket approach lets you, say, set
4898 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
4899 performance while not exceeding your monthly bandwidth quota.
4900 - Push out a tls record's worth of data once you've got it, rather
4901 than waiting until you've read everything waiting to be read. This
4902 may improve performance by pipelining better. We'll see.
4903 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
4904 from failed circuits (if they haven't been connected yet) and attach
4906 - Expire old streams that haven't managed to connect. Some day we'll
4907 have them reattach to new circuits instead.
4910 - Fix several memory leaks that were causing servers to become bloated
4912 - Fix a few very rare assert triggers. A few more remain.
4913 - Setuid to User _before_ complaining about running as root.
4916 Changes in version 0.0.2pre19 - 2004-01-07
4918 - Fix deadlock condition in dns farm. We were telling a child to die by
4919 closing the parent's file descriptor to him. But newer children were
4920 inheriting the open file descriptor from the parent, and since they
4921 weren't closing it, the socket never closed, so the child never read
4922 eof, so he never knew to exit. Similarly, dns workers were holding
4923 open other sockets, leading to all sorts of chaos.
4924 - New cleaner daemon() code for forking and backgrounding.
4925 - If you log to a file, it now prints an entry at the top of the
4926 logfile so you know it's working.
4927 - The onionskin challenge length was 30 bytes longer than necessary.
4928 - Started to patch up the spec so it's not quite so out of date.
4931 Changes in version 0.0.2pre18 - 2004-01-02
4933 - Fix endian issues with the 'integrity' field in the relay header.
4934 - Fix a potential bug where connections in state
4935 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
4938 Changes in version 0.0.2pre17 - 2003-12-30
4940 - Made --debuglogfile (or any second log file, actually) work.
4941 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
4942 adversary could force us into an infinite loop.
4945 - Each onionskin handshake now includes a hash of the computed key,
4946 to prove the server's identity and help perfect forward secrecy.
4947 - Changed cell size from 256 to 512 bytes (working toward compatibility
4949 - Changed cell length to 2 bytes, and moved it to the relay header.
4950 - Implemented end-to-end integrity checking for the payloads of
4952 - Separated streamid from 'recognized' (otherwise circuits will get
4953 messed up when we try to have streams exit from the middle). We
4954 use the integrity-checking to confirm that a cell is addressed to
4956 - Randomize the initial circid and streamid values, so an adversary who
4957 breaks into a node can't learn how many circuits or streams have
4961 Changes in version 0.0.2pre16 - 2003-12-14
4963 - Fixed a bug that made HUP trigger an assert
4964 - Fixed a bug where a circuit that immediately failed wasn't being
4965 counted as a failed circuit in counting retries.
4968 - Now we close the circuit when we get a truncated cell: otherwise we're
4969 open to an anonymity attack where a bad node in the path truncates
4970 the circuit and then we open streams at him.
4971 - Add port ranges to exit policies
4972 - Add a conservative default exit policy
4973 - Warn if you're running tor as root
4974 - on HUP, retry OR connections and close/rebind listeners
4975 - options.EntryNodes: try these nodes first when picking the first node
4976 - options.ExitNodes: if your best choices happen to include any of
4977 your preferred exit nodes, you choose among just those preferred
4979 - options.ExcludedNodes: nodes that are never picked in path building
4982 Changes in version 0.0.2pre15 - 2003-12-03
4983 o Robustness and bugfixes:
4984 - Sometimes clients would cache incorrect DNS resolves, which would
4985 really screw things up.
4986 - An OP that goes offline would slowly leak all its sockets and stop
4988 - A wide variety of bugfixes in exit node selection, exit policy
4989 handling, and processing pending streams when a new circuit is
4991 - Pick nodes for a path only from those the directory says are up
4992 - Choose randomly from all running dirservers, not always the first one
4993 - Increase allowed http header size for directory fetch.
4994 - Stop writing to stderr (if we're daemonized it will be closed).
4995 - Enable -g always, so cores will be more useful to me.
4996 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
4999 - Wrote a man page. It lists commonly used options.
5002 - Change default loglevel to warn.
5003 - Make PidFile default to null rather than littering in your CWD.
5004 - OnionRouter config option is now obsolete. Instead it just checks
5006 - Moved to a single unified torrc file for both clients and servers.
5009 Changes in version 0.0.2pre14 - 2003-11-29
5010 o Robustness and bugfixes:
5011 - Force the admin to make the DataDirectory himself
5012 - to get ownership/permissions right
5013 - so clients no longer make a DataDirectory and then never use it
5014 - fix bug where a client who was offline for 45 minutes would never
5015 pull down a directory again
5016 - fix (or at least hide really well) the dns assert bug that was
5017 causing server crashes
5018 - warnings and improved robustness wrt clockskew for certs
5019 - use the native daemon(3) to daemonize, when available
5020 - exit if bind() fails
5021 - exit if neither socksport nor orport is defined
5022 - include our own tor_timegm (Win32 doesn't have its own)
5023 - bugfix for win32 with lots of connections
5024 - fix minor bias in PRNG
5025 - make dirserver more robust to corrupt cached directory
5028 - Wrote the design document (woo)
5030 o Circuit building and exit policies:
5031 - Circuits no longer try to use nodes that the directory has told them
5033 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
5034 bitcounts (18.0.0.0/8).
5035 - Make AP connections standby for a circuit if no suitable circuit
5036 exists, rather than failing
5037 - Circuits choose exit node based on addr/port, exit policies, and
5038 which AP connections are standing by
5039 - Bump min pathlen from 2 to 3
5040 - Relay end cells have a payload to describe why the stream ended.
5041 - If the stream failed because of exit policy, try again with a new
5043 - Clients have a dns cache to remember resolved addresses.
5044 - Notice more quickly when we have no working circuits
5047 - APPort is now called SocksPort
5048 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
5050 - RecommendedVersions is now a config variable rather than
5051 hardcoded (for dirservers)
5052 - Reloads config on HUP
5053 - Usage info on -h or --help
5054 - If you set User and Group config vars, it'll setu/gid to them.
5056 Changes in version 0.0.2pre13 - 2003-10-19
5057 o General stability:
5058 - SSL_write no longer fails when it returns WANTWRITE and the number
5059 of bytes in the buf has changed by the next SSL_write call.
5060 - Fix segfault fetching directory when network is down
5061 - Fix a variety of minor memory leaks
5062 - Dirservers reload the fingerprints file on HUP, so I don't have
5063 to take down the network when I approve a new router
5064 - Default server config file has explicit Address line to specify fqdn
5067 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
5068 - Make listener connections not ever alloc bufs
5070 o Autoconf improvements:
5071 - don't clobber an external CFLAGS in ./configure
5072 - Make install now works
5073 - create var/lib/tor on make install
5074 - autocreate a tor.sh initscript to help distribs
5075 - autocreate the torrc and sample-server-torrc with correct paths
5077 o Log files and Daemonizing now work:
5078 - If --DebugLogFile is specified, log to it at -l debug
5079 - If --LogFile is specified, use it instead of commandline
5080 - If --RunAsDaemon is set, tor forks and backgrounds on startup