1 Changes in version 0.1.1.9-alpha - 2005-11-01
2 o Usability improvements:
3 - Start calling it FooListenAddress rather than FooBindAddress,
4 since none of our users know what it means to bind an address or
5 port. Warn if you use the old name in your config.
6 - Reduce clutter in server logs. We're going to try to make
7 them actually usable now. New config option ProtocolWarnings that
8 lets you hear about how _other Tors_ are breaking the protocol. Off
10 - Divide log messages into logging domains. Once we put some sort
11 of interface on this, it will let people looking at more verbose
12 log levels specify the topics they want to hear more about.
13 - Make directory servers return better http 404 error messages
14 instead of a generic "Servers unavailable".
15 - Check for even more Windows version flags when writing the platform
16 string for servers, and note any we do not recognize.
17 - Clean up all the OpenSSL memory when exiting, so we can detect
19 - Make directory authorities be non-versioning, non-naming by
20 default. Now we can add new directory servers without requiring
21 their operators to pay close attention.
22 - Start making directory caches retain old routerinfos, so soon
23 clients can start asking by digest of descriptor rather than by
24 fingerprint of server.
26 o Performance improvements:
27 - Directory servers now silently throw away new descriptors that
28 haven't changed much if the timestamps are similar. We do this to
29 tolerate older Tor servers that upload a new descriptor every 15
30 minutes. (It seemed like a good idea at the time.)
31 - Inline bottleneck smartlist functions; use fast versions by default.
32 - Add a "Map from digest to void*" abstraction digestmap_t so we
33 can do less hex encoding/decoding. Use it in router_get_by_digest()
34 to resolve a performance bottleneck.
35 - Allow tor_gzip_uncompress to extract as much as possible from
36 truncated compressed data. Try to extract as many
37 descriptors as possible from truncated http responses (when
38 DIR_PURPOSE_FETCH_ROUTERDESC).
39 - Make circ->onionskin a pointer, not a static array. moria2 was using
40 125000 circuit_t's after it had been up for a few weeks, which
41 translates to 20+ megs of wasted space.
43 o Security improvements:
44 - Add half our entropy from RAND_poll in OpenSSL. This knows how
45 to use egd (if present), openbsd weirdness (if present), vms/os2
46 weirdness (if we ever port there), and more in the future.
48 o Bugfixes on 0.1.0.x:
49 - Do round-robin writes of at most 16 kB per write. This might be
50 more fair on loaded Tor servers, and it might resolve our Windows
51 crash bug. It might also slow things down.
52 - When a Tor server's IP changes (e.g. from a dyndns address),
53 upload a new descriptor so clients will learn too.
54 - Really busy servers were keeping enough circuits open on stable
55 connections that they were wrapping around the circuit_id
56 space. (It's only two bytes.) This exposed a bug where we would
57 feel free to reuse a circuit_id even if it still exists but has
58 been marked for close. Try to fix this bug.
59 - If we would close a stream early (e.g. it asks for a .exit that
60 we know would refuse it) but the LeaveStreamsUnattached config
61 option is set by the controller, then don't close it.
63 o Bugfixes on 0.1.1.8-alpha:
64 - Fix a big pile of memory leaks, some of them serious.
65 - Do not try to download a routerdesc if we would immediately reject
67 - Resume inserting a newline between all router descriptors when
68 generating (old style) signed directories, since our spec says
70 - When providing content-type application/octet-stream for
71 server descriptors using .z, we were leaving out the
72 content-encoding header. Oops. (Everything tolerated this just fine,
73 but that doesn't mean we need to be part of the problem.)
74 - Fix a potential seg fault in getconf and getinfo using version 1
75 of the controller protocol.
76 - Avoid crash: do not check whether DirPort is reachable when we
77 are suppressing it because of hibernation.
78 - Make --hash-password not crash on exit.
81 Changes in version 0.1.1.8-alpha - 2005-10-07
82 o New features (major):
83 - Clients don't download or use the directory anymore. Now they
84 download and use network-statuses from the trusted dirservers,
85 and fetch individual server descriptors as needed from mirrors.
86 See dir-spec.txt for all the gory details.
87 - Be more conservative about whether to advertise our DirPort.
88 The main change is to not advertise if we're running at capacity
89 and either a) we could hibernate or b) our capacity is low and
90 we're using a default DirPort.
91 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
93 o New features (minor):
94 - Try to be smart about when to retry network-status and
95 server-descriptor fetches. Still needs some tuning.
96 - Stop parsing, storing, or using running-routers output (but
97 mirrors still cache and serve it).
98 - Consider a threshold of versioning dirservers (dirservers who have
99 an opinion about which Tor versions are still recommended) before
100 deciding whether to warn the user that he's obsolete.
101 - Dirservers can now reject/invalidate by key and IP, with the
102 config options "AuthDirInvalid" and "AuthDirReject". This is
103 useful since currently we automatically list servers as running
104 and usable even if we know they're jerks.
105 - Provide dire warnings to any users who set DirServer; move it out
106 of torrc.sample and into torrc.complete.
107 - Add MyFamily to torrc.sample in the server section.
108 - Add nicknames to the DirServer line, so we can refer to them
109 without requiring all our users to memorize their IP addresses.
110 - When we get an EOF or a timeout on a directory connection, note
111 how many bytes of serverdesc we are dropping. This will help
112 us determine whether it is smart to parse incomplete serverdesc
114 - Add a new function to "change pseudonyms" -- that is, to stop
115 using any currently-dirty circuits for new streams, so we don't
116 link new actions to old actions. Currently it's only called on
117 HUP (or SIGNAL RELOAD).
118 - On sighup, if UseHelperNodes changed to 1, use new circuits.
119 - Start using RAND_bytes rather than RAND_pseudo_bytes from
120 OpenSSL. Also, reseed our entropy every hour, not just at
121 startup. And entropy in 512-bit chunks, not 160-bit chunks.
123 o Fixes on 0.1.1.7-alpha:
124 - Nobody ever implemented EVENT_ADDRMAP for control protocol
125 version 0, so don't let version 0 controllers ask for it.
126 - If you requested something with too many newlines via the
127 v1 controller protocol, you could crash tor.
128 - Fix a number of memory leaks, including some pretty serious ones.
129 - Re-enable DirPort testing again, so Tor servers will be willing
130 to advertise their DirPort if it's reachable.
131 - On TLS handshake, only check the other router's nickname against
132 its expected nickname if is_named is set.
134 o Fixes forward-ported from 0.1.0.15:
135 - Don't crash when we don't have any spare file descriptors and we
136 try to spawn a dns or cpu worker.
137 - Make the numbers in read-history and write-history into uint64s,
138 so they don't overflow and publish negatives in the descriptor.
141 - For the OS X package's modified privoxy config file, comment
142 out the "logfile" line so we don't log everything passed
144 - We were whining about using socks4 or socks5-with-local-lookup
145 even when it's an IP in the "virtual" range we designed exactly
147 - We were leaking some memory every time the client changes IPs.
148 - Never call free() on tor_malloc()d memory. This will help us
149 use dmalloc to detect memory leaks.
150 - Check for named servers when looking them up by nickname;
151 warn when we'recalling a non-named server by its nickname;
152 don't warn twice about the same name.
153 - Try to list MyFamily elements by key, not by nickname, and warn
154 if we've not heard of the server.
155 - Make windows platform detection (uname equivalent) smarter.
156 - It turns out sparc64 doesn't like unaligned access either.
159 Changes in version 0.1.1.7-alpha - 2005-09-14
160 o Fixes on 0.1.1.6-alpha:
161 - Exit servers were crashing when people asked them to make a
162 connection to an address not in their exit policy.
163 - Looking up a non-existent stream for a v1 control connection would
165 - Fix a seg fault if we ask a dirserver for a descriptor by
166 fingerprint but he doesn't know about him.
167 - SETCONF was appending items to linelists, not clearing them.
168 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
169 out and refuse the setconf if it would fail.
170 - Downgrade the dirserver log messages when whining about
174 - Add Peter Palfrader's check-tor script to tor/contrib/
175 It lets you easily check whether a given server (referenced by
176 nickname) is reachable by you.
177 - Numerous changes to move towards client-side v2 directories. Not
181 - If the user gave tor an odd number of command-line arguments,
182 we were silently ignoring the last one. Now we complain and fail.
183 [This wins the oldest-bug prize -- this bug has been present since
184 November 2002, as released in Tor 0.0.0.]
185 - Do not use unaligned memory access on alpha, mips, or mipsel.
186 It *works*, but is very slow, so we treat them as if it doesn't.
187 - Retry directory requests if we fail to get an answer we like
188 from a given dirserver (we were retrying before, but only if
190 - When writing the RecommendedVersions line, sort them first.
191 - When the client asked for a rendezvous port that the hidden
192 service didn't want to provide, we were sending an IP address
193 back along with the end cell. Fortunately, it was zero. But stop
195 - Correct "your server is reachable" log entries to indicate that
196 it was self-testing that told us so.
199 Changes in version 0.1.1.6-alpha - 2005-09-09
200 o Fixes on 0.1.1.5-alpha:
201 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
202 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
203 - Fix bug with tor_memmem finding a match at the end of the string.
204 - Make unit tests run without segfaulting.
205 - Resolve some solaris x86 compile warnings.
206 - Handle duplicate lines in approved-routers files without warning.
207 - Fix bug where as soon as a server refused any requests due to his
208 exit policy (e.g. when we ask for localhost and he tells us that's
209 127.0.0.1 and he won't do it), we decided he wasn't obeying his
210 exit policy and stopped using him for any exits.
211 - Only do openssl hardware accelerator stuff if openssl version is
214 o New controller features/fixes:
215 - Add a "RESETCONF" command so you can set config options like
216 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
217 a config option in the torrc with no value, then it clears it
218 entirely (rather than setting it to its default).
219 - Add a "GETINFO config-file" to tell us where torrc is.
220 - Avoid sending blank lines when GETINFO replies should be empty.
221 - Add a QUIT command for the controller (for using it manually).
222 - Fix a bug in SAVECONF that was adding default dirservers and
223 other redundant entries to the torrc file.
225 o Start on the new directory design:
226 - Generate, publish, cache, serve new network-status format.
227 - Publish individual descriptors (by fingerprint, by "all", and by
229 - Publish client and server recommended versions separately.
230 - Allow tor_gzip_uncompress() to handle multiple concatenated
231 compressed strings. Serve compressed groups of router
232 descriptors. The compression logic here could be more
234 - Distinguish v1 authorities (all currently trusted directories)
235 from v2 authorities (all trusted directories).
236 - Change DirServers config line to note which dirs are v1 authorities.
237 - Add configuration option "V1AuthoritativeDirectory 1" which
238 moria1, moria2, and tor26 should set.
239 - Remove option when getting directory cache to see whether they
240 support running-routers; they all do now. Replace it with one
241 to see whether caches support v2 stuff.
244 - Dirservers now do their own external reachability testing of each
245 Tor server, and only list them as running if they've been found to
246 be reachable. We also send back warnings to the server's logs if
247 it uploads a descriptor that we already believe is unreachable.
248 - Implement exit enclaves: if we know an IP address for the
249 destination, and there's a running Tor server at that address
250 which allows exit to the destination, then extend the circuit to
251 that exit first. This provides end-to-end encryption and end-to-end
252 authentication. Also, if the user wants a .exit address or enclave,
253 use 4 hops rather than 3, and cannibalize a general circ for it
255 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
256 controller. Also, rotate dns and cpu workers if the controller
257 changes options that will affect them; and initialize the dns
258 worker cache tree whether or not we start out as a server.
259 - Only upload a new server descriptor when options change, 18
260 hours have passed, uptime is reset, or bandwidth changes a lot.
261 - Check [X-]Forwarded-For headers in HTTP requests when generating
262 log messages. This lets people run dirservers (and caches) behind
263 Apache but still know which IP addresses are causing warnings.
265 o Config option changes:
266 - Replace (Fascist)Firewall* config options with a new
267 ReachableAddresses option that understands address policies.
268 For example, "ReachableAddresses *:80,*:443"
269 - Get rid of IgnoreVersion undocumented config option, and make us
270 only warn, never exit, when we're running an obsolete version.
271 - Make MonthlyAccountingStart config option truly obsolete now.
274 - Reject ports 465 and 587 in the default exit policy, since
275 people have started using them for spam too.
276 - It turns out we couldn't bootstrap a network since we added
277 reachability detection in 0.1.0.1-rc. Good thing the Tor network
278 has never gone down. Add an AssumeReachable config option to let
279 servers and dirservers bootstrap. When we're trying to build a
280 high-uptime or high-bandwidth circuit but there aren't enough
281 suitable servers, try being less picky rather than simply failing.
282 - Our logic to decide if the OR we connected to was the right guy
283 was brittle and maybe open to a mitm for unverified routers.
284 - We weren't cannibalizing circuits correctly for
285 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
286 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
287 build those from scratch. This should make hidden services faster.
288 - Predict required circuits better, with an eye toward making hidden
289 services faster on the service end.
290 - Retry streams if the exit node sends back a 'misc' failure. This
291 should result in fewer random failures. Also, after failing
292 from resolve failed or misc, reset the num failures, so we give
293 it a fair shake next time we try.
294 - Clean up the rendezvous warn log msgs, and downgrade some to info.
295 - Reduce severity on logs about dns worker spawning and culling.
296 - When we're shutting down and we do something like try to post a
297 server descriptor or rendezvous descriptor, don't complain that
298 we seem to be unreachable. Of course we are, we're shutting down.
299 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
300 We don't use them yet, but maybe one day our DNS resolver will be
301 able to discover them.
302 - Make ContactInfo mandatory for authoritative directory servers.
303 - Require server descriptors to list IPv4 addresses -- hostnames
304 are no longer allowed. This also fixes some potential security
305 problems with people providing hostnames as their address and then
306 preferentially resolving them to partition users.
307 - Change log line for unreachability to explicitly suggest /etc/hosts
308 as the culprit. Also make it clearer what IP address and ports we're
309 testing for reachability.
310 - Put quotes around user-supplied strings when logging so users are
311 more likely to realize if they add bad characters (like quotes)
313 - Let auth dir servers start without specifying an Address config
315 - Make unit tests (and other invocations that aren't the real Tor)
316 run without launching listeners, creating subdirectories, and so on.
319 Changes in version 0.1.1.5-alpha - 2005-08-08
320 o Bugfixes included in 0.1.0.14.
322 o Bugfixes on 0.1.0.x:
323 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
324 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
325 it would silently using ignore the 6668.
328 Changes in version 0.1.1.4-alpha - 2005-08-04
329 o Bugfixes included in 0.1.0.13.
332 - Improve tor_gettimeofday() granularity on windows.
333 - Make clients regenerate their keys when their IP address changes.
334 - Implement some more GETINFO goodness: expose helper nodes, config
335 options, getinfo keys.
338 Changes in version 0.1.1.3-alpha - 2005-07-25
339 o Bugfixes on 0.1.1.2-alpha:
340 - Fix a bug in handling the controller's "post descriptor"
342 - Fix several bugs in handling the controller's "extend circuit"
344 - Fix a bug in handling the controller's "stream status" event.
345 - Fix an assert failure if we have a controller listening for
346 circuit events and we go offline.
347 - Re-allow hidden service descriptors to publish 0 intro points.
348 - Fix a crash when generating your hidden service descriptor if
349 you don't have enough intro points already.
351 o New features on 0.1.1.2-alpha:
352 - New controller function "getinfo accounting", to ask how
353 many bytes we've used in this time period.
354 - Experimental support for helper nodes: a lot of the risk from
355 a small static adversary comes because users pick new random
356 nodes every time they rebuild a circuit. Now users will try to
357 stick to the same small set of entry nodes if they can. Not
358 enabled by default yet.
360 o Bugfixes on 0.1.0.12:
361 - If you're an auth dir server, always publish your dirport,
362 even if you haven't yet found yourself to be reachable.
363 - Fix a size_t underflow in smartlist_join_strings2() that made
364 it do bad things when you hand it an empty smartlist.
367 Changes in version 0.1.1.2-alpha - 2005-07-14
368 o New directory servers:
369 - tor26 has changed IP address.
371 o Bugfixes on 0.1.0.x, crashes/leaks:
372 - Port the servers-not-obeying-their-exit-policies fix from 0.1.0.11.
373 - Fix an fd leak in start_daemon().
374 - On Windows, you can't always reopen a port right after you've
375 closed it. So change retry_listeners() to only close and re-open
376 ports that have changed.
377 - Fix a possible double-free in tor_gzip_uncompress().
379 o Bugfixes on 0.1.0.x, usability:
380 - When tor_socketpair() fails in Windows, give a reasonable
381 Windows-style errno back.
382 - Let people type "tor --install" as well as "tor -install" when they
383 want to make it an NT service.
384 - NT service patch from Matt Edman to improve error messages.
385 - When the controller asks for a config option with an abbreviated
386 name, give the full name in our response.
387 - Correct the man page entry on TrackHostExitsExpire.
388 - Looks like we were never delivering deflated (i.e. compressed)
389 running-routers lists, even when asked. Oops.
390 - When --disable-threads is set, do not search for or link against
393 o Bugfixes on 0.1.1.x:
394 - Fix a seg fault with autodetecting which controller version is
398 - New hidden service descriptor format: put a version in it, and
399 let people specify introduction/rendezvous points that aren't
400 in "the directory" (which is subjective anyway).
401 - Allow the DEBUG controller event to work again. Mark certain log
402 entries as "don't tell this to controllers", so we avoid cycles.
405 Changes in version 0.1.1.1-alpha - 2005-06-29
407 - Make OS X init script check for missing argument, so we don't
408 confuse users who invoke it incorrectly.
409 - Fix a seg fault in "tor --hash-password foo".
410 - Fix a possible way to DoS dirservers.
411 - When we complain that your exit policy implicitly allows local or
412 private address spaces, name them explicitly so operators can
414 - Make the log message less scary when all the dirservers are
415 temporarily unreachable.
416 - We were printing the number of idle dns workers incorrectly when
420 - Revised controller protocol (version 1) that uses ascii rather
421 than binary. Add supporting libraries in python and java so you
422 can use the controller from your applications without caring how
424 - Spiffy new support for crypto hardware accelerators. Can somebody
428 Changes in version 0.1.0.15 - 2005-09-23
429 o Bugfixes on 0.1.0.x:
430 - Reject ports 465 and 587 (spam targets) in default exit policy.
431 - Don't crash when we don't have any spare file descriptors and we
432 try to spawn a dns or cpu worker.
433 - Get rid of IgnoreVersion undocumented config option, and make us
434 only warn, never exit, when we're running an obsolete version.
435 - Don't try to print a null string when your server finds itself to
436 be unreachable and the Address config option is empty.
437 - Make the numbers in read-history and write-history into uint64s,
438 so they don't overflow and publish negatives in the descriptor.
439 - Fix a minor memory leak in smartlist_string_remove().
440 - We were only allowing ourselves to upload a server descriptor at
441 most every 20 minutes, even if it changed earlier than that.
442 - Clean up log entries that pointed to old URLs.
445 Changes in version 0.1.0.14 - 2005-08-08
446 o Bugfixes on 0.1.0.x:
447 - Fix the other half of the bug with crypto handshakes.
448 - Fix an assert trigger if you send a 'signal term' via the
449 controller when it's listening for 'event info' messages.
452 Changes in version 0.1.0.13 - 2005-08-04
453 o Bugfixes on 0.1.0.x:
454 - Fix a critical bug in the security of our crypto handshakes.
455 - Fix a size_t underflow in smartlist_join_strings2() that made
456 it do bad things when you hand it an empty smartlist.
457 - Fix Windows installer to ship Tor license (thanks to Aphex for
458 pointing out this oversight) and put a link to the doc directory
460 - Explicitly set no-unaligned-access for sparc: it turns out the
461 new gcc's let you compile broken code, but that doesn't make it
465 Changes in version 0.1.0.12 - 2005-07-18
466 o New directory servers:
467 - tor26 has changed IP address.
469 o Bugfixes on 0.1.0.x:
470 - Fix a possible double-free in tor_gzip_uncompress().
471 - When --disable-threads is set, do not search for or link against
473 - Don't trigger an assert if an authoritative directory server
474 claims its dirport is 0.
475 - Fix bug with removing Tor as an NT service: some people were
476 getting "The service did not return an error." Thanks to Matt
480 Changes in version 0.1.0.11 - 2005-06-30
481 o Bugfixes on 0.1.0.x:
482 - Fix major security bug: servers were disregarding their
483 exit policies if clients behaved unexpectedly.
484 - Make OS X init script check for missing argument, so we don't
485 confuse users who invoke it incorrectly.
486 - Fix a seg fault in "tor --hash-password foo".
487 - The MAPADDRESS control command was broken.
490 Changes in version 0.1.0.10 - 2005-06-14
492 - Make NT services work and start on startup on Win32 (based on
493 patch by Matt Edman). See the FAQ entry for details.
494 - Make 'platform' string in descriptor more accurate for Win32
495 servers, so it's not just "unknown platform".
496 - REUSEADDR on normal platforms means you can rebind to the port
497 right after somebody else has let it go. But REUSEADDR on Win32
498 means you can bind to the port _even when somebody else already
499 has it bound_! So, don't do that on Win32.
500 - Clean up the log messages when starting on Win32 with no config
502 - Allow seeding the RNG on Win32 even when you're not running as
503 Administrator. If seeding the RNG on Win32 fails, quit.
505 o Assert / crash bugs:
506 - Refuse relay cells that claim to have a length larger than the
507 maximum allowed. This prevents a potential attack that could read
508 arbitrary memory (e.g. keys) from an exit server's process.
509 - If unofficial Tor clients connect and send weird TLS certs, our
510 Tor server triggers an assert. Stop asserting, and start handling
511 TLS errors better in other situations too.
512 - Fix a race condition that can trigger an assert when we have a
513 pending create cell and an OR connection attempt fails.
516 - Use pthreads for worker processes rather than forking. This was
517 forced because when we forked, we ended up wasting a lot of
518 duplicate ram over time.
519 - Also switch to foo_r versions of some library calls to allow
520 reentry and threadsafeness.
521 - Implement --disable-threads configure option. Disable threads on
522 netbsd and openbsd by default, because they have no reentrant
523 resolver functions (!), and on solaris since it has other
525 - Fix possible bug on threading platforms (e.g. win32) which was
526 leaking a file descriptor whenever a cpuworker or dnsworker died.
527 - Fix a minor memory leak when somebody establishes an introduction
528 point at your Tor server.
529 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
531 - Add ./configure --with-dmalloc option, to track memory leaks.
532 - And try to free all memory on closing, so we can detect what
535 o Protocol correctness:
536 - When we've connected to an OR and handshaked but didn't like
537 the result, we were closing the conn without sending destroy
538 cells back for pending circuits. Now send those destroys.
539 - Start sending 'truncated' cells back rather than destroy cells
540 if the circuit closes in front of you. This means we won't have
541 to abandon partially built circuits.
542 - Handle changed router status correctly when dirserver reloads
543 fingerprint file. We used to be dropping all unverified descriptors
544 right then. The bug was hidden because we would immediately
545 fetch a directory from another dirserver, which would include the
546 descriptors we just dropped.
547 - Revise tor-spec to add more/better stream end reasons.
548 - Revise all calls to connection_edge_end to avoid sending 'misc',
549 and to take errno into account where possible.
550 - Client now retries when streams end early for 'hibernating' or
551 'resource limit' reasons, rather than failing them.
552 - Try to be more zealous about calling connection_edge_end when
553 things go bad with edge conns in connection.c.
555 o Robustness improvements:
556 - Better handling for heterogeneous / unreliable nodes:
557 - Annotate circuits with whether they aim to contain high uptime
558 nodes and/or high capacity nodes. When building circuits, choose
560 - This means that every single node in an intro rend circuit,
561 not just the last one, will have a minimum uptime.
562 - New config option LongLivedPorts to indicate application streams
563 that will want high uptime circuits.
564 - Servers reset uptime when a dir fetch entirely fails. This
565 hopefully reflects stability of the server's network connectivity.
566 - If somebody starts his tor server in Jan 2004 and then fixes his
567 clock, don't make his published uptime be a year.
568 - Reset published uptime when we wake up from hibernation.
569 - Introduce a notion of 'internal' circs, which are chosen without
570 regard to the exit policy of the last hop. Intro and rendezvous
571 circs must be internal circs, to avoid leaking information. Resolve
572 and connect streams can use internal circs if they want.
573 - New circuit pooling algorithm: keep track of what destination ports
574 we've used recently (start out assuming we'll want to use 80), and
575 make sure to have enough circs around to satisfy these ports. Also
576 make sure to have 2 internal circs around if we've required internal
577 circs lately (and with high uptime if we've seen that lately too).
578 - Turn addr_policy_compare from a tristate to a quadstate; this should
579 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
580 for google.com" problem.
581 - When a client asks us for a dir mirror and we don't have one,
582 launch an attempt to get a fresh one.
583 - First cut at support for "create-fast" cells. Clients can use
584 these when extending to their first hop, since the TLS already
585 provides forward secrecy and authentication. Not enabled on
588 o Reachability testing.
589 - Your Tor server will automatically try to see if its ORPort and
590 DirPort are reachable from the outside, and it won't upload its
591 descriptor until it decides at least ORPort is reachable (when
592 DirPort is not yet found reachable, publish it as zero).
593 - When building testing circs for ORPort testing, use only
594 high-bandwidth nodes, so fewer circuits fail.
595 - Notice when our IP changes, and reset stats/uptime/reachability.
596 - Authdirservers don't do ORPort reachability detection, since
597 they're in clique mode, so it will be rare to find a server not
598 already connected to them.
599 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
603 - Now we allow two unverified servers with the same nickname
604 but different keys. But if a nickname is verified, only that
605 nickname+key are allowed.
606 - If you're an authdirserver connecting to an address:port,
607 and it's not the OR you were expecting, forget about that
608 descriptor. If he *was* the one you were expecting, then forget
609 about all other descriptors for that address:port.
610 - Allow servers to publish descriptors from 12 hours in the future.
611 Corollary: only whine about clock skew from the dirserver if
612 he's a trusted dirserver (since now even verified servers could
613 have quite wrong clocks).
614 - Require servers that use the default dirservers to have public IP
615 addresses. We have too many servers that are configured with private
616 IPs and their admins never notice the log entries complaining that
617 their descriptors are being rejected.
619 o Efficiency improvements:
620 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
621 and /dev/poll), and hopefully work better on Windows too.
622 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
623 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
624 - Find libevent even if it's hiding in /usr/local/ and your
625 CFLAGS and LDFLAGS don't tell you to look there.
626 - Be able to link with libevent as a shared library (the default
627 after 1.0d), even if it's hiding in /usr/local/lib and even
628 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
629 assuming you're running gcc. Otherwise fail and give a useful
631 - Switch to a new buffer management algorithm, which tries to avoid
632 reallocing and copying quite as much. In first tests it looks like
633 it uses *more* memory on average, but less cpu.
634 - Switch our internal buffers implementation to use a ring buffer,
635 to hopefully improve performance for fast servers a lot.
636 - Reenable the part of the code that tries to flush as soon as an
637 OR outbuf has a full TLS record available. Perhaps this will make
638 OR outbufs not grow as huge except in rare cases, thus saving lots
639 of CPU time plus memory.
640 - Improve performance for dirservers: stop re-parsing the whole
641 directory every time you regenerate it.
642 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
643 it much faster to look up a circuit for each relay cell.
644 - Remove most calls to assert_all_pending_dns_resolves_ok(),
645 since they're eating our cpu on exit nodes.
646 - Stop wasting time doing a case insensitive comparison for every
647 dns name every time we do any lookup. Canonicalize the names to
648 lowercase when you first see them.
651 - Handle unavailable hidden services better. Handle slow or busy
652 hidden services better.
653 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
654 circ as necessary, if there are any completed ones lying around
655 when we try to launch one.
656 - Make hidden services try to establish a rendezvous for 30 seconds
657 after fetching the descriptor, rather than for n (where n=3)
658 attempts to build a circuit.
659 - Adjust maximum skew and age for rendezvous descriptors: let skew
660 be 48 hours rather than 90 minutes.
661 - Reject malformed .onion addresses rather then passing them on as
665 - More Tor controller support. See
666 http://tor.eff.org/doc/control-spec.txt for all the new features,
667 including signals to emulate unix signals from any platform;
668 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
669 closestream; closecircuit; etc.
670 - Encode hashed controller passwords in hex instead of base64,
671 to make it easier to write controllers.
672 - Revise control spec and implementation to allow all log messages to
673 be sent to controller with their severities intact (suggested by
674 Matt Edman). Disable debug-level logs while delivering a debug-level
675 log to the controller, to prevent loop. Update TorControl to handle
678 o New config options/defaults:
679 - Begin scrubbing sensitive strings from logs by default. Turn off
680 the config option SafeLogging if you need to do debugging.
681 - New exit policy: accept most low-numbered ports, rather than
682 rejecting most low-numbered ports.
683 - Put a note in the torrc about abuse potential with the default
685 - Add support for CONNECTing through https proxies, with "HttpsProxy"
687 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
688 based on patch from Adam Langley (basic auth only).
689 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
690 the fast servers that have been joining lately. (Clients are now
691 willing to load balance over up to 2 MB of advertised bandwidth
693 - New config option MaxAdvertisedBandwidth which lets you advertise
694 a low bandwidthrate (to not attract as many circuits) while still
695 allowing a higher bandwidthrate in reality.
696 - Require BandwidthRate to be at least 20kB/s for servers.
697 - Add a NoPublish config option, so you can be a server (e.g. for
698 testing running Tor servers in other Tor networks) without
699 publishing your descriptor to the primary dirservers.
700 - Add a new AddressMap config directive to rewrite incoming socks
701 addresses. This lets you, for example, declare an implicit
702 required exit node for certain sites.
703 - Add a new TrackHostExits config directive to trigger addressmaps
704 for certain incoming socks addresses -- for sites that break when
705 your exit keeps changing (based on patch from Mike Perry).
706 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
707 which describes how often we retry making new circuits if current
708 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
709 how long we're willing to make use of an already-dirty circuit.
710 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
711 a config option "ShutdownWaitLength" (when using kill -INT on
713 - Fix an edge case in parsing config options: if they say "--"
714 on the commandline, it's not a config option (thanks weasel).
715 - New config option DirAllowPrivateAddresses for authdirservers.
716 Now by default they refuse router descriptors that have non-IP or
717 private-IP addresses.
718 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
719 smart" default value: low for servers and high for clients.
720 - Some people were putting "Address " in their torrc, and they had
721 a buggy resolver that resolved " " to 0.0.0.0. Oops.
722 - If DataDir is ~/.tor, and that expands to /.tor, then default to
723 LOCALSTATEDIR/tor instead.
724 - Implement --verify-config command-line option to check if your torrc
725 is valid without actually launching Tor.
727 o Logging improvements:
728 - When dirservers refuse a server descriptor, we now log its
729 contactinfo, platform, and the poster's IP address.
730 - Only warn once per nickname from add_nickname_list_to_smartlist()
731 per failure, so an entrynode or exitnode choice that's down won't
733 - When we're connecting to an OR and he's got a different nickname/key
734 than we were expecting, only complain loudly if we're an OP or a
735 dirserver. Complaining loudly to the OR admins just confuses them.
736 - Whine at you if you're a server and you don't set your contactinfo.
737 - Warn when exit policy implicitly allows local addresses.
738 - Give a better warning when some other server advertises an
739 ORPort that is actually an apache running ssl.
740 - If we get an incredibly skewed timestamp from a dirserver mirror
741 that isn't a verified OR, don't warn -- it's probably him that's
743 - When a dirserver causes you to give a warn, mention which dirserver
745 - Initialize libevent later in the startup process, so the logs are
746 already established by the time we start logging libevent warns.
747 - Use correct errno on win32 if libevent fails.
748 - Check and warn about known-bad/slow libevent versions.
749 - Stop warning about sigpipes in the logs. We're going to
750 pretend that getting these occassionally is normal and fine.
752 o New contrib scripts:
753 - New experimental script tor/contrib/exitlist: a simple python
754 script to parse directories and find Tor nodes that exit to listed
756 - New experimental script tor/contrib/ExerciseServer.py (needs more
757 work) that uses the controller interface to build circuits and
758 fetch pages over them. This will help us bootstrap servers that
759 have lots of capacity but haven't noticed it yet.
760 - New experimental script tor/contrib/PathDemo.py (needs more work)
761 that uses the controller interface to let you choose whole paths
763 "<hostname>.<path,separated by dots>.<length of path>.path"
764 - New contributed script "privoxy-tor-toggle" to toggle whether
765 Privoxy uses Tor. Seems to be configured for Debian by default.
766 - Have torctl.in/tor.sh.in check for location of su binary (needed
770 - chdir() to your datadirectory at the *end* of the daemonize process,
771 not the beginning. This was a problem because the first time you
772 run tor, if your datadir isn't there, and you have runasdaemon set
773 to 1, it will try to chdir to it before it tries to create it. Oops.
774 - Fix several double-mark-for-close bugs, e.g. where we were finding
775 a conn for a cell even if that conn is already marked for close.
776 - Stop most cases of hanging up on a socks connection without sending
778 - Fix a bug in the RPM package: set home directory for _tor to
779 something more reasonable when first installing.
780 - Stop putting nodename in the Platform string in server descriptors.
781 It doesn't actually help, and it is confusing/upsetting some people.
782 - When using preferred entry or exit nodes, ignore whether the
783 circuit wants uptime or capacity. They asked for the nodes, they
785 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
786 artificially capped at 500kB.
787 - Cache local dns resolves correctly even when they're .exit
789 - If we're hibernating and we get a SIGINT, exit immediately.
790 - tor-resolve requests were ignoring .exit if there was a working circuit
791 they could use instead.
792 - Pay more attention to the ClientOnly config option.
793 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
794 installer screens; and don't put stuff into StartupItems unless
795 the user asks you to.
798 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
799 rather than just rejecting it.
800 - If our clock jumps forward by 100 seconds or more, assume something
801 has gone wrong with our network and abandon all not-yet-used circs.
802 - When an application is using socks5, give him the whole variety of
803 potential socks5 responses (connect refused, host unreachable, etc),
804 rather than just "success" or "failure".
805 - A more sane version numbering system. See
806 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
807 - Change version parsing logic: a version is "obsolete" if it is not
808 recommended and (1) there is a newer recommended version in the
809 same series, or (2) there are no recommended versions in the same
810 series, but there are some recommended versions in a newer series.
811 A version is "new" if it is newer than any recommended version in
813 - Report HTTP reasons to client when getting a response from directory
814 servers -- so you can actually know what went wrong.
815 - Reject odd-looking addresses at the client (e.g. addresses that
816 contain a colon), rather than having the server drop them because
818 - Stop publishing socksport in the directory, since it's not
819 actually meant to be public. For compatibility, publish a 0 there
821 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
822 cookies to disk and doesn't log each web request to disk. (Thanks
823 to Brett Carrington for pointing this out.)
824 - Add OSX uninstall instructions. An actual uninstall script will
826 - Add "opt hibernating 1" to server descriptor to make it clearer
827 whether the server is hibernating.
830 Changes in version 0.0.9.10 - 2005-06-16
831 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
832 - Refuse relay cells that claim to have a length larger than the
833 maximum allowed. This prevents a potential attack that could read
834 arbitrary memory (e.g. keys) from an exit server's process.
837 Changes in version 0.0.9.9 - 2005-04-23
838 o Bugfixes on 0.0.9.x:
839 - If unofficial Tor clients connect and send weird TLS certs, our
840 Tor server triggers an assert. This release contains a minimal
841 backport from the broader fix that we put into 0.1.0.4-rc.
844 Changes in version 0.0.9.8 - 2005-04-07
845 o Bugfixes on 0.0.9.x:
846 - We have a bug that I haven't found yet. Sometimes, very rarely,
847 cpuworkers get stuck in the 'busy' state, even though the cpuworker
848 thinks of itself as idle. This meant that no new circuits ever got
849 established. Here's a workaround to kill any cpuworker that's been
850 busy for more than 100 seconds.
853 Changes in version 0.0.9.7 - 2005-04-01
854 o Bugfixes on 0.0.9.x:
855 - Fix another race crash bug (thanks to Glenn Fink for reporting).
856 - Compare identity to identity, not to nickname, when extending to
857 a router not already in the directory. This was preventing us from
858 extending to unknown routers. Oops.
859 - Make sure to create OS X Tor user in <500 range, so we aren't
860 creating actual system users.
861 - Note where connection-that-hasn't-sent-end was marked, and fix
862 a few really loud instances of this harmless bug (it's fixed more
866 Changes in version 0.0.9.6 - 2005-03-24
867 o Bugfixes on 0.0.9.x (crashes and asserts):
868 - Add new end stream reasons to maintainance branch. Fix bug where
869 reason (8) could trigger an assert. Prevent bug from recurring.
870 - Apparently win32 stat wants paths to not end with a slash.
871 - Fix assert triggers in assert_cpath_layer_ok(), where we were
872 blowing away the circuit that conn->cpath_layer points to, then
873 checking to see if the circ is well-formed. Backport check to make
874 sure we dont use the cpath on a closed connection.
875 - Prevent circuit_resume_edge_reading_helper() from trying to package
876 inbufs for marked-for-close streams.
877 - Don't crash on hup if your options->address has become unresolvable.
878 - Some systems (like OS X) sometimes accept() a connection and tell
879 you the remote host is 0.0.0.0:0. If this happens, due to some
880 other mis-features, we get confused; so refuse the conn for now.
882 o Bugfixes on 0.0.9.x (other):
883 - Fix harmless but scary "Unrecognized content encoding" warn message.
884 - Add new stream error reason: TORPROTOCOL reason means "you are not
885 speaking a version of Tor I understand; say bye-bye to your stream."
886 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
887 into the future, now that we are more tolerant of skew. This
888 resolves a bug where a Tor server would refuse to cache a directory
889 because all the directories it gets are too far in the future;
890 yet the Tor server never logs any complaints about clock skew.
891 - Mac packaging magic: make man pages useable, and do not overwrite
892 existing torrc files.
893 - Make OS X log happily to /var/log/tor/tor.log
896 Changes in version 0.0.9.5 - 2005-02-22
897 o Bugfixes on 0.0.9.x:
898 - Fix an assert race at exit nodes when resolve requests fail.
899 - Stop picking unverified dir mirrors--it only leads to misery.
900 - Patch from Matt Edman to make NT services work better. Service
901 support is still not compiled into the executable by default.
902 - Patch from Dmitri Bely so the Tor service runs better under
903 the win32 SYSTEM account.
904 - Make tor-resolve actually work (?) on Win32.
905 - Fix a sign bug when getrlimit claims to have 4+ billion
906 file descriptors available.
907 - Stop refusing to start when bandwidthburst == bandwidthrate.
908 - When create cells have been on the onion queue more than five
909 seconds, just send back a destroy and take them off the list.
912 Changes in version 0.0.9.4 - 2005-02-03
914 - Fix an assert bug that took down most of our servers: when
915 a server claims to have 1 GB of bandwidthburst, don't
917 - Don't crash as badly if we have spawned the max allowed number
918 of dnsworkers, or we're out of file descriptors.
919 - Block more file-sharing ports in the default exit policy.
920 - MaxConn is now automatically set to the hard limit of max
921 file descriptors we're allowed (ulimit -n), minus a few for
923 - Give a clearer message when servers need to raise their
924 ulimit -n when they start running out of file descriptors.
925 - SGI Compatibility patches from Jan Schaumann.
926 - Tolerate a corrupt cached directory better.
927 - When a dirserver hasn't approved your server, list which one.
928 - Go into soft hibernation after 95% of the bandwidth is used,
929 not 99%. This is especially important for daily hibernators who
930 have a small accounting max. Hopefully it will result in fewer
931 cut connections when the hard hibernation starts.
932 - Load-balance better when using servers that claim more than
934 - Make NT services work (experimental, only used if compiled in).
937 Changes in version 0.0.9.3 - 2005-01-21
939 - Backport the cpu use fixes from main branch, so busy servers won't
940 need as much processor time.
941 - Work better when we go offline and then come back, or when we
942 run Tor at boot before the network is up. We do this by
943 optimistically trying to fetch a new directory whenever an
944 application request comes in and we think we're offline -- the
945 human is hopefully a good measure of when the network is back.
946 - Backport some minimal hidserv bugfixes: keep rend circuits open as
947 long as you keep using them; actually publish hidserv descriptors
948 shortly after they change, rather than waiting 20-40 minutes.
949 - Enable Mac startup script by default.
950 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
951 - When you update AllowUnverifiedNodes or FirewallPorts via the
952 controller's setconf feature, we were always appending, never
954 - When you update HiddenServiceDir via setconf, it was screwing up
955 the order of reading the lines, making it fail.
956 - Do not rewrite a cached directory back to the cache; otherwise we
957 will think it is recent and not fetch a newer one on startup.
958 - Workaround for webservers that lie about Content-Encoding: Tor
959 now tries to autodetect compressed directories and compression
960 itself. This lets us Proxypass dir fetches through apache.
963 Changes in version 0.0.9.2 - 2005-01-04
964 o Bugfixes on 0.0.9 (crashes and asserts):
965 - Fix an assert on startup when the disk is full and you're logging
967 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
968 style address, then we'd crash.
969 - Fix an assert trigger when the running-routers string we get from
970 a dirserver is broken.
971 - Make worker threads start and run on win32. Now win32 servers
973 - Bandaid (not actually fix, but now it doesn't crash) an assert
974 where the dns worker dies mysteriously and the main Tor process
975 doesn't remember anything about the address it was resolving.
977 o Bugfixes on 0.0.9 (Win32):
978 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
979 name out of the warning/assert messages.
980 - Fix a superficial "unhandled error on read" bug on win32.
981 - The win32 installer no longer requires a click-through for our
982 license, since our Free Software license grants rights but does not
984 - Win32: When connecting to a dirserver fails, try another one
985 immediately. (This was already working for non-win32 Tors.)
986 - Stop trying to parse $HOME on win32 when hunting for default
988 - Make tor-resolve.c work on win32 by calling network_init().
990 o Bugfixes on 0.0.9 (other):
991 - Make 0.0.9.x build on Solaris again.
992 - Due to a fencepost error, we were blowing away the \n when reporting
993 confvalue items in the controller. So asking for multiple config
994 values at once couldn't work.
995 - When listing circuits that are pending on an opening OR connection,
996 if we're an OR we were listing circuits that *end* at us as
997 being pending on every listener, dns/cpu worker, etc. Stop that.
998 - Dirservers were failing to create 'running-routers' or 'directory'
999 strings if we had more than some threshold of routers. Fix them so
1000 they can handle any number of routers.
1001 - Fix a superficial "Duplicate mark for close" bug.
1002 - Stop checking for clock skew for OR connections, even for servers.
1003 - Fix a fencepost error that was chopping off the last letter of any
1004 nickname that is the maximum allowed nickname length.
1005 - Update URLs in log messages so they point to the new website.
1006 - Fix a potential problem in mangling server private keys while
1007 writing to disk (not triggered yet, as far as we know).
1008 - Include the licenses for other free software we include in Tor,
1009 now that we're shipping binary distributions more regularly.
1012 Changes in version 0.0.9.1 - 2004-12-15
1013 o Bugfixes on 0.0.9:
1014 - Make hibernation actually work.
1015 - Make HashedControlPassword config option work.
1016 - When we're reporting event circuit status to a controller,
1017 don't use the stream status code.
1020 Changes in version 0.0.9 - 2004-12-12
1021 o Bugfixes on 0.0.8.1 (Crashes and asserts):
1022 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
1023 write() call will fail and we handle it there.
1024 - When we run out of disk space, or other log writing error, don't
1025 crash. Just stop logging to that log and continue.
1026 - Fix isspace() and friends so they still make Solaris happy
1027 but also so they don't trigger asserts on win32.
1028 - Fix assert failure on malformed socks4a requests.
1029 - Fix an assert bug where a hidden service provider would fail if
1030 the first hop of his rendezvous circuit was down.
1031 - Better handling of size_t vs int, so we're more robust on 64
1034 o Bugfixes on 0.0.8.1 (Win32):
1035 - Make windows sockets actually non-blocking (oops), and handle
1036 win32 socket errors better.
1037 - Fix parse_iso_time on platforms without strptime (eg win32).
1038 - win32: when being multithreaded, leave parent fdarray open.
1039 - Better handling of winsock includes on non-MSV win32 compilers.
1040 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
1042 - Make unit tests work on win32.
1044 o Bugfixes on 0.0.8.1 (Path selection and streams):
1045 - Calculate timeout for waiting for a connected cell from the time
1046 we sent the begin cell, not from the time the stream started. If
1047 it took a long time to establish the circuit, we would time out
1048 right after sending the begin cell.
1049 - Fix router_compare_addr_to_addr_policy: it was not treating a port
1050 of * as always matching, so we were picking reject *:* nodes as
1051 exit nodes too. Oops.
1052 - When read() failed on a stream, we would close it without sending
1053 back an end. So 'connection refused' would simply be ignored and
1054 the user would get no response.
1055 - Stop a sigpipe: when an 'end' cell races with eof from the app,
1056 we shouldn't hold-open-until-flush if the eof arrived first.
1057 - Let resolve conns retry/expire also, rather than sticking around
1059 - Fix more dns related bugs: send back resolve_failed and end cells
1060 more reliably when the resolve fails, rather than closing the
1061 circuit and then trying to send the cell. Also attach dummy resolve
1062 connections to a circuit *before* calling dns_resolve(), to fix
1063 a bug where cached answers would never be sent in RESOLVED cells.
1065 o Bugfixes on 0.0.8.1 (Circuits):
1066 - Finally fix a bug that's been plaguing us for a year:
1067 With high load, circuit package window was reaching 0. Whenever
1068 we got a circuit-level sendme, we were reading a lot on each
1069 socket, but only writing out a bit. So we would eventually reach
1070 eof. This would be noticed and acted on even when there were still
1071 bytes sitting in the inbuf.
1072 - Use identity comparison, not nickname comparison, to choose which
1073 half of circuit-ID-space each side gets to use. This is needed
1074 because sometimes we think of a router as a nickname, and sometimes
1075 as a hex ID, and we can't predict what the other side will do.
1077 o Bugfixes on 0.0.8.1 (Other):
1078 - Fix a whole slew of memory leaks.
1079 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
1080 - If we are using select, make sure we stay within FD_SETSIZE.
1081 - When poll() is interrupted, we shouldn't believe the revents values.
1082 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
1083 and smartlist_len, which are two major profiling offenders.
1084 - If do_hup fails, actually notice.
1085 - Flush the log file descriptor after we print "Tor opening log file",
1086 so we don't see those messages days later.
1087 - Hidden service operators now correctly handle version 1 style
1088 INTRODUCE1 cells (nobody generates them still, so not a critical
1090 - Handle more errnos from accept() without closing the listener.
1091 Some OpenBSD machines were closing their listeners because
1092 they ran out of file descriptors.
1093 - Some people had wrapped their tor client/server in a script
1094 that would restart it whenever it died. This did not play well
1095 with our "shut down if your version is obsolete" code. Now people
1096 don't fetch a new directory if their local cached version is
1098 - Make our autogen.sh work on ksh as well as bash.
1099 - Better torrc example lines for dirbindaddress and orbindaddress.
1100 - Improved bounds checking on parsed ints (e.g. config options and
1101 the ones we find in directories.)
1102 - Stop using separate defaults for no-config-file and
1103 empty-config-file. Now you have to explicitly turn off SocksPort,
1104 if you don't want it open.
1105 - We were starting to daemonize before we opened our logs, so if
1106 there were any problems opening logs, we would complain to stderr,
1107 which wouldn't work, and then mysteriously exit.
1108 - If a verified OR connects to us before he's uploaded his descriptor,
1109 or we verify him and hup but he still has the original TLS
1110 connection, then conn->nickname is still set like he's unverified.
1112 o Code security improvements, inspired by Ilja:
1113 - tor_snprintf wrapper over snprintf with consistent (though not C99)
1115 - Replace sprintf with tor_snprintf. (I think they were all safe, but
1117 - Replace strcpy/strncpy with strlcpy in more places.
1118 - Avoid strcat; use tor_snprintf or strlcat instead.
1120 o Features (circuits and streams):
1121 - New circuit building strategy: keep a list of ports that we've
1122 used in the past 6 hours, and always try to have 2 circuits open
1123 or on the way that will handle each such port. Seed us with port
1124 80 so web users won't complain that Tor is "slow to start up".
1125 - Make kill -USR1 dump more useful stats about circuits.
1126 - When warning about retrying or giving up, print the address, so
1127 the user knows which one it's talking about.
1128 - If you haven't used a clean circuit in an hour, throw it away,
1129 just to be on the safe side. (This means after 6 hours a totally
1130 unused Tor client will have no circuits open.)
1131 - Support "foo.nickname.exit" addresses, to let Alice request the
1132 address "foo" as viewed by exit node "nickname". Based on a patch
1134 - If your requested entry or exit node has advertised bandwidth 0,
1136 - Be more greedy about filling up relay cells -- we try reading again
1137 once we've processed the stuff we read, in case enough has arrived
1138 to fill the last cell completely.
1139 - Refuse application socks connections to port 0.
1140 - Use only 0.0.9pre1 and later servers for resolve cells.
1142 o Features (bandwidth):
1143 - Hibernation: New config option "AccountingMax" lets you
1144 set how many bytes per month (in each direction) you want to
1145 allow your server to consume. Rather than spreading those
1146 bytes out evenly over the month, we instead hibernate for some
1147 of the month and pop up at a deterministic time, work until
1148 the bytes are consumed, then hibernate again. Config option
1149 "MonthlyAccountingStart" lets you specify which day of the month
1150 your billing cycle starts on.
1151 - Implement weekly/monthly/daily accounting: now you specify your
1152 hibernation properties by
1153 AccountingMax N bytes|KB|MB|GB|TB
1154 AccountingStart day|week|month [day] HH:MM
1155 Defaults to "month 1 0:00".
1156 - Let bandwidth and interval config options be specified as 5 bytes,
1157 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
1159 o Features (directories):
1160 - New "router-status" line in directory, to better bind each verified
1161 nickname to its identity key.
1162 - Clients can ask dirservers for /dir.z to get a compressed version
1163 of the directory. Only works for servers running 0.0.9, of course.
1164 - Make clients cache directories and use them to seed their router
1165 lists at startup. This means clients have a datadir again.
1166 - Respond to content-encoding headers by trying to uncompress as
1168 - Clients and servers now fetch running-routers; cache
1169 running-routers; compress running-routers; serve compressed
1171 - Make moria2 advertise a dirport of 80, so people behind firewalls
1172 will be able to get a directory.
1173 - Http proxy support
1174 - Dirservers translate requests for http://%s:%d/x to /x
1175 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
1176 be routed through this host.
1177 - Clients ask for /tor/x rather than /x for new enough dirservers.
1178 This way we can one day coexist peacefully with apache.
1179 - Clients specify a "Host: %s%d" http header, to be compatible
1180 with more proxies, and so running squid on an exit node can work.
1181 - Protect dirservers from overzealous descriptor uploading -- wait
1182 10 seconds after directory gets dirty, before regenerating.
1184 o Features (packages and install):
1185 - Add NSI installer contributed by J Doe.
1186 - Apply NT service patch from Osamu Fujino. Still needs more work.
1187 - Commit VC6 and VC7 workspace/project files.
1188 - Commit a tor.spec for making RPM files, with help from jbash.
1189 - Add contrib/torctl.in contributed by Glenn Fink.
1190 - Make expand_filename handle ~ and ~username.
1191 - Use autoconf to enable largefile support where necessary. Use
1192 ftello where available, since ftell can fail at 2GB.
1193 - Ship src/win32/ in the tarball, so people can use it to build.
1194 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
1197 o Features (ui controller):
1198 - Control interface: a separate program can now talk to your
1199 client/server over a socket, and get/set config options, receive
1200 notifications of circuits and streams starting/finishing/dying,
1201 bandwidth used, etc. The next step is to get some GUIs working.
1202 Let us know if you want to help out. See doc/control-spec.txt .
1203 - Ship a contrib/tor-control.py as an example script to interact
1204 with the control port.
1205 - "tor --hash-password zzyxz" will output a salted password for
1206 use in authenticating to the control interface.
1207 - Implement the control-spec's SAVECONF command, to write your
1208 configuration to torrc.
1209 - Get cookie authentication for the controller closer to working.
1210 - When set_conf changes our server descriptor, upload a new copy.
1211 But don't upload it too often if there are frequent changes.
1213 o Features (config and command-line):
1214 - Deprecate unofficial config option abbreviations, and abbreviations
1215 not on the command line.
1216 - Configuration infrastructure support for warning on obsolete
1218 - Give a slightly more useful output for "tor -h".
1219 - Break DirFetchPostPeriod into:
1220 - DirFetchPeriod for fetching full directory,
1221 - StatusFetchPeriod for fetching running-routers,
1222 - DirPostPeriod for posting server descriptor,
1223 - RendPostPeriod for posting hidden service descriptors.
1224 - New log format in config:
1225 "Log minsev[-maxsev] stdout|stderr|syslog" or
1226 "Log minsev[-maxsev] file /var/foo"
1227 - DirPolicy config option, to let people reject incoming addresses
1228 from their dirserver.
1229 - "tor --list-fingerprint" will list your identity key fingerprint
1231 - Make tor --version --version dump the cvs Id of every file.
1232 - New 'MyFamily nick1,...' config option for a server to
1233 specify other servers that shouldn't be used in the same circuit
1234 with it. Only believed if nick1 also specifies us.
1235 - New 'NodeFamily nick1,nick2,...' config option for a client to
1236 specify nodes that it doesn't want to use in the same circuit.
1237 - New 'Redirectexit pattern address:port' config option for a
1238 server to redirect exit connections, e.g. to a local squid.
1239 - Add "pass" target for RedirectExit, to make it easier to break
1240 out of a sequence of RedirectExit rules.
1241 - Make the dirservers file obsolete.
1242 - Include a dir-signing-key token in directories to tell the
1243 parsing entity which key is being used to sign.
1244 - Remove the built-in bulky default dirservers string.
1245 - New config option "Dirserver %s:%d [fingerprint]", which can be
1246 repeated as many times as needed. If no dirservers specified,
1247 default to moria1,moria2,tor26.
1248 - Make 'Routerfile' config option obsolete.
1249 - Discourage people from setting their dirfetchpostperiod more often
1250 than once per minute.
1253 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
1254 get back to normal.)
1255 - Accept *:706 (silc) in default exit policy.
1256 - Implement new versioning format for post 0.1.
1257 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
1258 log more informatively.
1259 - Check clock skew for verified servers, but allow unverified
1260 servers and clients to have any clock skew.
1261 - Make sure the hidden service descriptors are at a random offset
1262 from each other, to hinder linkability.
1263 - Clients now generate a TLS cert too, in preparation for having
1264 them act more like real nodes.
1265 - Add a pure-C tor-resolve implementation.
1266 - Use getrlimit and friends to ensure we can reach MaxConn (currently
1267 1024) file descriptors.
1268 - Raise the max dns workers from 50 to 100.
1271 Changes in version 0.0.8.1 - 2004-10-13
1273 - Fix a seg fault that can be triggered remotely for Tor
1274 clients/servers with an open dirport.
1275 - Fix a rare assert trigger, where routerinfos for entries in
1276 our cpath would expire while we're building the path.
1277 - Fix a bug in OutboundBindAddress so it (hopefully) works.
1278 - Fix a rare seg fault for people running hidden services on
1279 intermittent connections.
1280 - Fix a bug in parsing opt keywords with objects.
1281 - Fix a stale pointer assert bug when a stream detaches and
1283 - Fix a string format vulnerability (probably not exploitable)
1284 in reporting stats locally.
1285 - Fix an assert trigger: sometimes launching circuits can fail
1286 immediately, e.g. because too many circuits have failed recently.
1287 - Fix a compile warning on 64 bit platforms.
1290 Changes in version 0.0.8 - 2004-08-25
1292 - Made our unit tests compile again on OpenBSD 3.5, and tor
1293 itself compile again on OpenBSD on a sparc64.
1294 - We were neglecting milliseconds when logging on win32, so
1295 everything appeared to happen at the beginning of each second.
1296 - Check directory signature _before_ you decide whether you're
1297 you're running an obsolete version and should exit.
1298 - Check directory signature _before_ you parse the running-routers
1299 list to decide who's running.
1300 - Check return value of fclose while writing to disk, so we don't
1301 end up with broken files when servers run out of disk space.
1302 - Port it to SunOS 5.9 / Athena
1303 - Fix two bugs in saving onion keys to disk when rotating, so
1304 hopefully we'll get fewer people using old onion keys.
1305 - Remove our mostly unused -- and broken -- hex_encode()
1306 function. Use base16_encode() instead. (Thanks to Timo Lindfors
1307 for pointing out this bug.)
1308 - Only pick and establish intro points after we've gotten a
1310 - Fix assert triggers: if the other side returns an address 0.0.0.0,
1311 don't put it into the client dns cache.
1312 - If a begin failed due to exit policy, but we believe the IP
1313 address should have been allowed, switch that router to exitpolicy
1314 reject *:* until we get our next directory.
1317 - 'Extend' relay cell payloads now include the digest of the
1318 intended next hop's identity key. Now we can verify that we're
1319 extending to the right router, and also extend to routers we
1320 hadn't heard of before.
1323 - Tor nodes can now act as relays (with an advertised ORPort)
1324 without being manually verified by the dirserver operators.
1325 - Uploaded descriptors of unverified routers are now accepted
1326 by the dirservers, and included in the directory.
1327 - Verified routers are listed by nickname in the running-routers
1328 list; unverified routers are listed as "$<fingerprint>".
1329 - We now use hash-of-identity-key in most places rather than
1330 nickname or addr:port, for improved security/flexibility.
1331 - AllowUnverifiedNodes config option to let circuits choose no-name
1332 routers in entry,middle,exit,introduction,rendezvous positions.
1333 Allow middle and rendezvous positions by default.
1334 - When picking unverified routers, skip those with low uptime and/or
1335 low bandwidth, depending on what properties you care about.
1336 - ClientOnly option for nodes that never want to become servers.
1337 - Directory caching.
1338 - "AuthoritativeDir 1" option for the official dirservers.
1339 - Now other nodes (clients and servers) will cache the latest
1340 directory they've pulled down.
1341 - They can enable their DirPort to serve it to others.
1342 - Clients will pull down a directory from any node with an open
1343 DirPort, and check the signature/timestamp correctly.
1344 - Authoritative dirservers now fetch directories from other
1345 authdirservers, to stay better synced.
1346 - Running-routers list tells who's down also, along with noting
1347 if they're verified (listed by nickname) or unverified (listed
1349 - Allow dirservers to serve running-router list separately.
1350 This isn't used yet.
1351 - You can now fetch $DIRURL/running-routers to get just the
1352 running-routers line, not the whole descriptor list. (But
1353 clients don't use this yet.)
1354 - Clients choose nodes proportional to advertised bandwidth.
1355 - Clients avoid using nodes with low uptime as introduction points.
1356 - Handle servers with dynamic IP addresses: don't just replace
1357 options->Address with the resolved one at startup, and
1358 detect our address right before we make a routerinfo each time.
1359 - 'FascistFirewall' option to pick dirservers and ORs on specific
1360 ports; plus 'FirewallPorts' config option to tell FascistFirewall
1361 which ports are open. (Defaults to 80,443)
1362 - Try other dirservers immediately if the one you try is down. This
1363 should tolerate down dirservers better now.
1364 - ORs connect-on-demand to other ORs
1365 - If you get an extend cell to an OR you're not connected to,
1366 connect, handshake, and forward the create cell.
1367 - The authoritative dirservers stay connected to everybody,
1368 and everybody stays connected to 0.0.7 servers, but otherwise
1369 clients/servers expire unused connections after 5 minutes.
1370 - When servers get a sigint, they delay 30 seconds (refusing new
1371 connections) then exit. A second sigint causes immediate exit.
1372 - File and name management:
1373 - Look for .torrc if no CONFDIR "torrc" is found.
1374 - If no datadir is defined, then choose, make, and secure ~/.tor
1376 - If torrc not found, exitpolicy reject *:*.
1377 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
1378 - If no nickname is defined, derive default from hostname.
1379 - Rename secret key files, e.g. identity.key -> secret_id_key,
1380 to discourage people from mailing their identity key to tor-ops.
1381 - Refuse to build a circuit before the directory has arrived --
1382 it won't work anyway, since you won't know the right onion keys
1384 - Parse tor version numbers so we can do an is-newer-than check
1385 rather than an is-in-the-list check.
1386 - New socks command 'resolve', to let us shim gethostbyname()
1388 - A 'tor_resolve' script to access the socks resolve functionality.
1389 - A new socks-extensions.txt doc file to describe our
1390 interpretation and extensions to the socks protocols.
1391 - Add a ContactInfo option, which gets published in descriptor.
1392 - Write tor version at the top of each log file
1393 - New docs in the tarball:
1395 - Document that you should proxy your SSL traffic too.
1396 - Log a warning if the user uses an unsafe socks variant, so people
1397 are more likely to learn about privoxy or socat.
1398 - Log a warning if you're running an unverified server, to let you
1399 know you might want to get it verified.
1400 - Change the default exit policy to reject the default edonkey,
1401 kazaa, gnutella ports.
1402 - Add replace_file() to util.[ch] to handle win32's rename().
1403 - Publish OR uptime in descriptor (and thus in directory) too.
1404 - Remember used bandwidth (both in and out), and publish 15-minute
1405 snapshots for the past day into our descriptor.
1406 - Be more aggressive about trying to make circuits when the network
1407 has changed (e.g. when you unsuspend your laptop).
1408 - Check for time skew on http headers; report date in response to
1410 - If the entrynode config line has only one node, don't pick it as
1412 - Add strict{entry|exit}nodes config options. If set to 1, then
1413 we refuse to build circuits that don't include the specified entry
1415 - OutboundBindAddress config option, to bind to a specific
1416 IP address for outgoing connect()s.
1417 - End truncated log entries (e.g. directories) with "[truncated]".
1420 Changes in version 0.0.7.3 - 2004-08-12
1421 o Stop dnsworkers from triggering an assert failure when you
1422 ask them to resolve the host "".
1425 Changes in version 0.0.7.2 - 2004-07-07
1426 o A better fix for the 0.0.0.0 problem, that will hopefully
1427 eliminate the remaining related assertion failures.
1430 Changes in version 0.0.7.1 - 2004-07-04
1431 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
1432 since internally we use 0.0.0.0 to signify "not yet resolved".
1435 Changes in version 0.0.7 - 2004-06-07
1436 o Fixes for crashes and other obnoxious bugs:
1437 - Fix an epipe bug: sometimes when directory connections failed
1438 to connect, we would give them a chance to flush before closing
1440 - When we detached from a circuit because of resolvefailed, we
1441 would immediately try the same circuit twice more, and then
1442 give up on the resolve thinking we'd tried three different
1444 - Limit the number of intro circuits we'll attempt to build for a
1445 hidden service per 15-minute period.
1446 - Check recommended-software string *early*, before actually parsing
1447 the directory. Thus we can detect an obsolete version and exit,
1448 even if the new directory format doesn't parse.
1449 o Fixes for security bugs:
1450 - Remember which nodes are dirservers when you startup, and if a
1451 random OR enables his dirport, don't automatically assume he's
1452 a trusted dirserver.
1454 - Directory connections were asking the wrong poll socket to
1455 start writing, and not asking themselves to start writing.
1456 - When we detached from a circuit because we sent a begin but
1457 didn't get a connected, we would use it again the first time;
1458 but after that we would correctly switch to a different one.
1459 - Stop warning when the first onion decrypt attempt fails; they
1460 will sometimes legitimately fail now that we rotate keys.
1461 - Override unaligned-access-ok check when $host_cpu is ia64 or
1462 arm. Apparently they allow it but the kernel whines.
1463 - Dirservers try to reconnect periodically too, in case connections
1465 - Fix some memory leaks in directory servers.
1466 - Allow backslash in Win32 filenames.
1467 - Made Tor build complain-free on FreeBSD, hopefully without
1468 breaking other BSD builds. We'll see.
1469 - Check directory signatures based on name of signer, not on whom
1470 we got the directory from. This will let us cache directories more
1472 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
1475 - Doxygen markup on all functions and global variables.
1476 - Make directory functions update routerlist, not replace it. So
1477 now directory disagreements are not so critical a problem.
1478 - Remove the upper limit on number of descriptors in a dirserver's
1479 directory (not that we were anywhere close).
1480 - Allow multiple logfiles at different severity ranges.
1481 - Allow *BindAddress to specify ":port" rather than setting *Port
1482 separately. Allow multiple instances of each BindAddress config
1483 option, so you can bind to multiple interfaces if you want.
1484 - Allow multiple exit policy lines, which are processed in order.
1485 Now we don't need that huge line with all the commas in it.
1486 - Enable accept/reject policies on SOCKS connections, so you can bind
1487 to 0.0.0.0 but still control who can use your OP.
1488 - Updated the man page to reflect these features.
1491 Changes in version 0.0.6.2 - 2004-05-16
1492 o Our integrity-checking digest was checking only the most recent cell,
1493 not the previous cells like we'd thought.
1494 Thanks to Stefan Mark for finding the flaw!
1497 Changes in version 0.0.6.1 - 2004-05-06
1498 o Fix two bugs in our AES counter-mode implementation (this affected
1499 onion-level stream encryption, but not TLS-level). It turns
1500 out we were doing something much more akin to a 16-character
1501 polyalphabetic cipher. Oops.
1502 Thanks to Stefan Mark for finding the flaw!
1503 o Retire moria3 as a directory server, and add tor26 as a directory
1507 Changes in version 0.0.6 - 2004-05-02
1509 - Hidden services and rendezvous points are implemented. Go to
1510 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
1511 hidden services. (This only works via a socks4a proxy such as
1512 Privoxy, and currently it's quite slow.)
1513 - We now rotate link (tls context) keys and onion keys.
1514 - CREATE cells now include oaep padding, so you can tell
1515 if you decrypted them correctly.
1516 - Retry stream correctly when we fail to connect because of
1517 exit-policy-reject (should try another) or can't-resolve-address.
1518 - When we hup a dirserver and we've *removed* a server from the
1519 approved-routers list, now we remove that server from the
1520 in-memory directories too.
1521 - Add bandwidthburst to server descriptor.
1522 - Directories now say which dirserver signed them.
1523 - Use a tor_assert macro that logs failed assertions too.
1524 - Since we don't support truncateds much, don't bother sending them;
1525 just close the circ.
1526 - Fetch randomness from /dev/urandom better (not via fopen/fread)
1527 - Better debugging for tls errors
1528 - Set Content-Type on the directory and hidserv descriptor.
1529 - Remove IVs from cipher code, since AES-ctr has none.
1531 - Fix an assert trigger for exit nodes that's been plaguing us since
1532 the days of 0.0.2prexx (thanks weasel!)
1533 - Fix a bug where we were closing tls connections intermittently.
1534 It turns out openssl keeps its errors around -- so if an error
1535 happens, and you don't ask about it, and then another openssl
1536 operation happens and succeeds, and you ask if there was an error,
1537 it tells you about the first error.
1538 - Fix a bug that's been lurking since 27 may 03 (!)
1539 When passing back a destroy cell, we would use the wrong circ id.
1540 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
1541 - Some versions of openssl have an SSL_pending function that erroneously
1542 returns bytes when there is a non-application record pending.
1543 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
1544 o We were using an array of length zero in a few places.
1545 o Win32's gethostbyname can't resolve an IP to an IP.
1546 o Win32's close can't close a socket.
1547 o Handle windows socket errors correctly.
1549 - check for <sys/limits.h> so we build on FreeBSD again, and
1550 <machine/limits.h> for NetBSD.
1553 Changes in version 0.0.5 - 2004-03-30
1554 o Install torrc as torrc.sample -- we no longer clobber your
1556 o Fix mangled-state bug in directory fetching (was causing sigpipes).
1557 o Only build circuits after we've fetched the directory: clients were
1558 using only the directory servers before they'd fetched a directory.
1559 This also means longer startup time; so it goes.
1560 o Fix an assert trigger where an OP would fail to handshake, and we'd
1561 expect it to have a nickname.
1562 o Work around a tsocks bug: do a socks reject when AP connection dies
1563 early, else tsocks goes into an infinite loop.
1564 o Hold socks connection open until reply is flushed (if possible)
1565 o Make exit nodes resolve IPs to IPs immediately, rather than asking
1566 the dns farm to do it.
1567 o Fix c99 aliasing warnings in rephist.c
1568 o Don't include server descriptors that are older than 24 hours in the
1570 o Give socks 'reject' replies their whole 15s to attempt to flush,
1571 rather than seeing the 60s timeout and assuming the flush had failed.
1572 o Clean automake droppings from the cvs repository
1573 o Add in a 'notice' log level for things the operator should hear
1574 but that aren't warnings
1577 Changes in version 0.0.4 - 2004-03-26
1578 o When connecting to a dirserver or OR and the network is down,
1582 Changes in version 0.0.3 - 2004-03-26
1583 o Warn and fail if server chose a nickname with illegal characters
1584 o Port to Solaris and Sparc:
1585 - include missing header fcntl.h
1586 - have autoconf find -lsocket -lnsl automatically
1587 - deal with hardware word alignment
1588 - make uname() work (solaris has a different return convention)
1589 - switch from using signal() to sigaction()
1590 o Preliminary work on reputation system:
1591 - Keep statistics on success/fail of connect attempts; they're published
1592 by kill -USR1 currently.
1593 - Add a RunTesting option to try to learn link state by creating test
1594 circuits, even when SocksPort is off.
1595 - Remove unused open circuits when there are too many.
1598 Changes in version 0.0.2 - 2004-03-19
1599 - Include strlcpy and strlcat for safer string ops
1600 - define INADDR_NONE so we compile (but still not run) on solaris
1603 Changes in version 0.0.2pre27 - 2004-03-14
1605 - Allow internal tor networks (we were rejecting internal IPs,
1606 now we allow them if they're set explicitly).
1607 - And fix a few endian issues.
1610 Changes in version 0.0.2pre26 - 2004-03-14
1612 - If a stream times out after 15s without a connected cell, don't
1613 try that circuit again: try a new one.
1614 - Retry streams at most 4 times. Then give up.
1615 - When a dirserver gets a descriptor from an unknown router, it
1616 logs its fingerprint (so the dirserver operator can choose to
1617 accept it even without mail from the server operator).
1618 - Inform unapproved servers when we reject their descriptors.
1619 - Make tor build on Windows again. It works as a client, who knows
1621 - Clearer instructions in the torrc for how to set up a server.
1622 - Be more efficient about reading fd's when our global token bucket
1623 (used for rate limiting) becomes empty.
1625 - Stop asserting that computers always go forward in time. It's
1627 - When we sent a cell (e.g. destroy) and then marked an OR connection
1628 expired, we might close it before finishing a flush if the other
1629 side isn't reading right then.
1630 - Don't allow dirservers to start if they haven't defined
1632 - We were caching transient dns failures. Oops.
1633 - Prevent servers from publishing an internal IP as their address.
1634 - Address a strcat vulnerability in circuit.c
1637 Changes in version 0.0.2pre25 - 2004-03-04
1639 - Put the OR's IP in its router descriptor, not its fqdn. That way
1640 we'll stop being stalled by gethostbyname for nodes with flaky dns,
1643 - If the user typed in an address that didn't resolve, the server
1647 Changes in version 0.0.2pre24 - 2004-03-03
1649 - Fix an assertion failure in dns.c, where we were trying to dequeue
1650 a pending dns resolve even if it wasn't pending
1651 - Fix a spurious socks5 warning about still trying to write after the
1652 connection is finished.
1653 - Hold certain marked_for_close connections open until they're finished
1654 flushing, rather than losing bytes by closing them too early.
1655 - Correctly report the reason for ending a stream
1656 - Remove some duplicate calls to connection_mark_for_close
1657 - Put switch_id and start_daemon earlier in the boot sequence, so it
1658 will actually try to chdir() to options.DataDirectory
1659 - Make 'make test' exit(1) if a test fails; fix some unit tests
1660 - Make tor fail when you use a config option it doesn't know about,
1661 rather than warn and continue.
1662 - Make --version work
1663 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
1666 Changes in version 0.0.2pre23 - 2004-02-29
1668 - Print a statement when the first circ is finished, so the user
1670 - If a relay cell is unrecognized at the end of the circuit,
1671 send back a destroy. (So attacks to mutate cells are more
1673 - New config option 'excludenodes' to avoid certain nodes for circuits.
1674 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
1675 so you can collect coredumps there.
1677 - Fix a bug in tls flushing where sometimes data got wedged and
1678 didn't flush until more data got sent. Hopefully this bug was
1679 a big factor in the random delays we were seeing.
1680 - Make 'connected' cells include the resolved IP, so the client
1681 dns cache actually gets populated.
1682 - Disallow changing from ORPort=0 to ORPort>0 on hup.
1683 - When we time-out on a stream and detach from the circuit, send an
1684 end cell down it first.
1685 - Only warn about an unknown router (in exitnodes, entrynodes,
1686 excludenodes) after we've fetched a directory.
1689 Changes in version 0.0.2pre22 - 2004-02-26
1691 - Servers publish less revealing uname information in descriptors.
1692 - More memory tracking and assertions, to crash more usefully when
1694 - If the default torrc isn't there, just use some default defaults.
1695 Plus provide an internal dirservers file if they don't have one.
1696 - When the user tries to use Tor as an http proxy, give them an http
1697 501 failure explaining that we're a socks proxy.
1698 - Dump a new router.desc on hup, to help confused people who change
1699 their exit policies and then wonder why router.desc doesn't reflect
1701 - Clean up the generic tor.sh init script that we ship with.
1703 - If the exit stream is pending on the resolve, and a destroy arrives,
1704 then the stream wasn't getting removed from the pending list. I
1705 think this was the one causing recent server crashes.
1706 - Use a more robust poll on OSX 10.3, since their poll is flaky.
1707 - When it couldn't resolve any dirservers, it was useless from then on.
1708 Now it reloads the RouterFile (or default dirservers) if it has no
1710 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
1711 many users don't even *have* a /usr/local/sbin/.
1714 Changes in version 0.0.2pre21 - 2004-02-18
1716 - There's a ChangeLog file that actually reflects the changelog.
1717 - There's a 'torify' wrapper script, with an accompanying
1718 tor-tsocks.conf, that simplifies the process of using tsocks for
1719 tor. It even has a man page.
1720 - The tor binary gets installed to sbin rather than bin now.
1721 - Retry streams where the connected cell hasn't arrived in 15 seconds
1722 - Clean up exit policy handling -- get the default out of the torrc,
1723 so we can update it without forcing each server operator to fix
1725 - Allow imaps and pop3s in default exit policy
1727 - Prevent picking middleman nodes as the last node in the circuit
1730 Changes in version 0.0.2pre20 - 2004-01-30
1732 - We now have a deb package, and it's in debian unstable. Go to
1734 - I've split the TotalBandwidth option into BandwidthRate (how many
1735 bytes per second you want to allow, long-term) and
1736 BandwidthBurst (how many bytes you will allow at once before the cap
1737 kicks in). This better token bucket approach lets you, say, set
1738 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
1739 performance while not exceeding your monthly bandwidth quota.
1740 - Push out a tls record's worth of data once you've got it, rather
1741 than waiting until you've read everything waiting to be read. This
1742 may improve performance by pipelining better. We'll see.
1743 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
1744 from failed circuits (if they haven't been connected yet) and attach
1746 - Expire old streams that haven't managed to connect. Some day we'll
1747 have them reattach to new circuits instead.
1750 - Fix several memory leaks that were causing servers to become bloated
1752 - Fix a few very rare assert triggers. A few more remain.
1753 - Setuid to User _before_ complaining about running as root.
1756 Changes in version 0.0.2pre19 - 2004-01-07
1758 - Fix deadlock condition in dns farm. We were telling a child to die by
1759 closing the parent's file descriptor to him. But newer children were
1760 inheriting the open file descriptor from the parent, and since they
1761 weren't closing it, the socket never closed, so the child never read
1762 eof, so he never knew to exit. Similarly, dns workers were holding
1763 open other sockets, leading to all sorts of chaos.
1764 - New cleaner daemon() code for forking and backgrounding.
1765 - If you log to a file, it now prints an entry at the top of the
1766 logfile so you know it's working.
1767 - The onionskin challenge length was 30 bytes longer than necessary.
1768 - Started to patch up the spec so it's not quite so out of date.
1771 Changes in version 0.0.2pre18 - 2004-01-02
1773 - Fix endian issues with the 'integrity' field in the relay header.
1774 - Fix a potential bug where connections in state
1775 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
1778 Changes in version 0.0.2pre17 - 2003-12-30
1780 - Made --debuglogfile (or any second log file, actually) work.
1781 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
1782 adversary could force us into an infinite loop.
1785 - Each onionskin handshake now includes a hash of the computed key,
1786 to prove the server's identity and help perfect forward secrecy.
1787 - Changed cell size from 256 to 512 bytes (working toward compatibility
1789 - Changed cell length to 2 bytes, and moved it to the relay header.
1790 - Implemented end-to-end integrity checking for the payloads of
1792 - Separated streamid from 'recognized' (otherwise circuits will get
1793 messed up when we try to have streams exit from the middle). We
1794 use the integrity-checking to confirm that a cell is addressed to
1796 - Randomize the initial circid and streamid values, so an adversary who
1797 breaks into a node can't learn how many circuits or streams have
1801 Changes in version 0.0.2pre16 - 2003-12-14
1803 - Fixed a bug that made HUP trigger an assert
1804 - Fixed a bug where a circuit that immediately failed wasn't being
1805 counted as a failed circuit in counting retries.
1808 - Now we close the circuit when we get a truncated cell: otherwise we're
1809 open to an anonymity attack where a bad node in the path truncates
1810 the circuit and then we open streams at him.
1811 - Add port ranges to exit policies
1812 - Add a conservative default exit policy
1813 - Warn if you're running tor as root
1814 - on HUP, retry OR connections and close/rebind listeners
1815 - options.EntryNodes: try these nodes first when picking the first node
1816 - options.ExitNodes: if your best choices happen to include any of
1817 your preferred exit nodes, you choose among just those preferred
1819 - options.ExcludedNodes: nodes that are never picked in path building
1822 Changes in version 0.0.2pre15 - 2003-12-03
1823 o Robustness and bugfixes:
1824 - Sometimes clients would cache incorrect DNS resolves, which would
1825 really screw things up.
1826 - An OP that goes offline would slowly leak all its sockets and stop
1828 - A wide variety of bugfixes in exit node selection, exit policy
1829 handling, and processing pending streams when a new circuit is
1831 - Pick nodes for a path only from those the directory says are up
1832 - Choose randomly from all running dirservers, not always the first one
1833 - Increase allowed http header size for directory fetch.
1834 - Stop writing to stderr (if we're daemonized it will be closed).
1835 - Enable -g always, so cores will be more useful to me.
1836 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
1839 - Wrote a man page. It lists commonly used options.
1842 - Change default loglevel to warn.
1843 - Make PidFile default to null rather than littering in your CWD.
1844 - OnionRouter config option is now obsolete. Instead it just checks
1846 - Moved to a single unified torrc file for both clients and servers.
1849 Changes in version 0.0.2pre14 - 2003-11-29
1850 o Robustness and bugfixes:
1851 - Force the admin to make the DataDirectory himself
1852 - to get ownership/permissions right
1853 - so clients no longer make a DataDirectory and then never use it
1854 - fix bug where a client who was offline for 45 minutes would never
1855 pull down a directory again
1856 - fix (or at least hide really well) the dns assert bug that was
1857 causing server crashes
1858 - warnings and improved robustness wrt clockskew for certs
1859 - use the native daemon(3) to daemonize, when available
1860 - exit if bind() fails
1861 - exit if neither socksport nor orport is defined
1862 - include our own tor_timegm (Win32 doesn't have its own)
1863 - bugfix for win32 with lots of connections
1864 - fix minor bias in PRNG
1865 - make dirserver more robust to corrupt cached directory
1868 - Wrote the design document (woo)
1870 o Circuit building and exit policies:
1871 - Circuits no longer try to use nodes that the directory has told them
1873 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
1874 bitcounts (18.0.0.0/8).
1875 - Make AP connections standby for a circuit if no suitable circuit
1876 exists, rather than failing
1877 - Circuits choose exit node based on addr/port, exit policies, and
1878 which AP connections are standing by
1879 - Bump min pathlen from 2 to 3
1880 - Relay end cells have a payload to describe why the stream ended.
1881 - If the stream failed because of exit policy, try again with a new
1883 - Clients have a dns cache to remember resolved addresses.
1884 - Notice more quickly when we have no working circuits
1887 - APPort is now called SocksPort
1888 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
1890 - RecommendedVersions is now a config variable rather than
1891 hardcoded (for dirservers)
1892 - Reloads config on HUP
1893 - Usage info on -h or --help
1894 - If you set User and Group config vars, it'll setu/gid to them.
1896 Changes in version 0.0.2pre13 - 2003-10-19
1897 o General stability:
1898 - SSL_write no longer fails when it returns WANTWRITE and the number
1899 of bytes in the buf has changed by the next SSL_write call.
1900 - Fix segfault fetching directory when network is down
1901 - Fix a variety of minor memory leaks
1902 - Dirservers reload the fingerprints file on HUP, so I don't have
1903 to take down the network when I approve a new router
1904 - Default server config file has explicit Address line to specify fqdn
1907 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
1908 - Make listener connections not ever alloc bufs
1910 o Autoconf improvements:
1911 - don't clobber an external CFLAGS in ./configure
1912 - Make install now works
1913 - create var/lib/tor on make install
1914 - autocreate a tor.sh initscript to help distribs
1915 - autocreate the torrc and sample-server-torrc with correct paths
1917 o Log files and Daemonizing now work:
1918 - If --DebugLogFile is specified, log to it at -l debug
1919 - If --LogFile is specified, use it instead of commandline
1920 - If --RunAsDaemon is set, tor forks and backgrounds on startup