1 Changes in version 0.1.2.7-alpha - 2007-??-??
3 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
5 - Previously, we would cache up to 16 old networkstatus documents
6 indefinitely, if they came from nontrusted authorities. Now we
7 discard them if they are more than 10 days old.
8 - Servers decline directory requests much more aggressively when
9 they're low on bandwidth. Otherwise they end up queueing more and
10 more directory responses, which can't be good for latency.
11 - Be willing to read or write on local connections (e.g. controller
12 connections) even when the global rate limiting buckets are empty.
13 - If our system clock jumps back in time, don't publish a negative
14 uptime in the descriptor. Also, don't let the global rate limiting
15 buckets go absurdly negative.
16 - Detect and reject malformed DNS responses containing circular
18 - Fix a memory leak when sending a 503 response for a networkstatus
20 - Flush local controller connection buffers periodically as we're
21 writing to them, so we avoid queueing 4+ megabytes of data before
25 - When computing clock skew from directory HTTP headers, consider what
26 time it was when we finished asking for the directory, not what
28 - Add some defensive programming to eventdns.c in an attempt to catch
29 possible memory-stomping bugs.
30 - Fix crash with "tor --list-fingerprint" (reported by seeess).
31 - Expire socks connections if they spend too long waiting for the
32 handshake to finish. Previously we would let them sit around for
33 days, if the connecting application didn't close them either.
34 - Stop using C functions that OpenBSD's linker doesn't like.
35 - Detect and reject DNS replies containing IPv4 or IPv6 records with
36 an incorrect number of bytes. (Previously, we would ignore the extra
38 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles in the
40 - Free memory held in recently-completed DNS lookup attempts on exit.
41 This was not a memory leak, but may have been hiding memory leaks.
42 - Don't launch requests for descriptors unless we have networkstatuses
43 from at least half of the authorities. This delays the first download
44 slightly under pathological circumstances, but can prevent us from
45 downloading a bunch of descriptors we don't need.
46 - Do not log IPs with TLS failures for incoming TLS connections. (Fixes
50 - Check for addresses with invalid characters at the exit as well as at
51 the client, and warn less verbosely when they fail. You can override
52 this by setting ServerDNSAllowNonRFC953Addresses to 1.
53 - Adapt a patch from goodell to let the contrib/exitlist script
54 take arguments rather than require direct editing.
55 - Inform the server operator when we decide not to advertise a
56 DirPort due to AccountingMax enabled or a low BandwidthRate. It
57 was confusing Zax, so now we're hopefully more helpful.
59 o Minor features (controller):
60 - Track reasons for OR connection failure; make these reasons available
61 via the controller interface. (Patch from Mike Perry.)
62 - Add a SOCKS_BAD_HOSTNAME client status event so controllers can learn
63 when clients are sending malformed hostnames to Tor.
64 - Clean up documentation for controller status events.
67 Changes in version 0.1.2.6-alpha - 2007-01-09
69 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
70 connection handles more than 4 gigs in either direction, we crash.
71 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
72 advertised exit node, somebody might try to exit from us when
73 we're bootstrapping and before we've built your descriptor yet.
74 Refuse the connection rather than crashing.
77 - Warn if we (as a server) find that we've resolved an address that we
78 weren't planning to resolve.
79 - Warn that using select() on any libevent version before 1.1 will be
80 unnecessarily slow (even for select()).
81 - Flush ERR-level controller status events just like we currently
82 flush ERR-level log events, so that a Tor shutdown doesn't prevent
83 the controller from learning about current events.
85 o Minor features (more controller status events):
86 - Implement EXTERNAL_ADDRESS server status event so controllers can
87 learn when our address changes.
88 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
89 can learn when directories reject our descriptor.
90 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
91 can learn when a client application is speaking a non-socks protocol
93 - Implement DANGEROUS_SOCKS client status event so controllers
94 can learn when a client application is leaking DNS addresses.
95 - Implement BUG general status event so controllers can learn when
96 Tor is unhappy about its internal invariants.
97 - Implement CLOCK_SKEW general status event so controllers can learn
98 when Tor thinks the system clock is set incorrectly.
99 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
100 server status events so controllers can learn when their descriptors
101 are accepted by a directory.
102 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
103 server status events so controllers can learn about Tor's progress in
104 deciding whether it's reachable from the outside.
105 - Implement BAD_LIBEVENT general status event so controllers can learn
106 when we have a version/method combination in libevent that needs to
108 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
109 and DNS_USELESS server status events so controllers can learn
110 about changes to DNS server status.
112 o Minor features (directory):
113 - Authorities no longer recommend exits as guards if this would shift
114 too much load to the exit nodes.
117 Changes in version 0.1.2.5-alpha - 2007-01-06
119 - Enable write limiting as well as read limiting. Now we sacrifice
120 capacity if we're pushing out lots of directory traffic, rather
121 than overrunning the user's intended bandwidth limits.
122 - Include TLS overhead when counting bandwidth usage; previously, we
123 would count only the bytes sent over TLS, but not the bytes used
125 - Support running the Tor service with a torrc not in the same
126 directory as tor.exe and default to using the torrc located in
127 the %appdata%\Tor\ of the user who installed the service. Patch
129 - Servers now check for the case when common DNS requests are going to
130 wildcarded addresses (i.e. all getting the same answer), and change
131 their exit policy to reject *:* if it's happening.
132 - Implement BEGIN_DIR cells, so we can connect to the directory
133 server via TLS to do encrypted directory requests rather than
134 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
135 config options if you like.
137 o Minor features (config and docs):
138 - Start using the state file to store bandwidth accounting data:
139 the bw_accounting file is now obsolete. We'll keep generating it
140 for a while for people who are still using 0.1.2.4-alpha.
141 - Try to batch changes to the state file so that we do as few
142 disk writes as possible while still storing important things in
144 - The state file and the bw_accounting file get saved less often when
145 the AvoidDiskWrites config option is set.
146 - Make PIDFile work on Windows (untested).
147 - Add internal descriptions for a bunch of configuration options:
148 accessible via controller interface and in comments in saved
150 - Reject *:563 (NNTPS) in the default exit policy. We already reject
151 NNTP by default, so this seems like a sensible addition.
152 - Clients now reject hostnames with invalid characters. This should
153 avoid some inadvertent info leaks. Add an option
154 AllowNonRFC953Hostnames to disable this behavior, in case somebody
155 is running a private network with hosts called @, !, and #.
156 - Add a maintainer script to tell us which options are missing
157 documentation: "make check-docs".
158 - Add a new address-spec.txt document to describe our special-case
159 addresses: .exit, .onion, and .noconnnect.
161 o Minor features (DNS):
162 - Ongoing work on eventdns infrastructure: now it has dns server
163 and ipv6 support. One day Tor will make use of it.
164 - Add client-side caching for reverse DNS lookups.
165 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
166 - When we change nameservers or IP addresses, reset and re-launch
167 our tests for DNS hijacking.
169 o Minor features (directory):
170 - Authorities now specify server versions in networkstatus. This adds
171 about 2% to the side of compressed networkstatus docs, and allows
172 clients to tell which servers support BEGIN_DIR and which don't.
173 The implementation is forward-compatible with a proposed future
174 protocol version scheme not tied to Tor versions.
175 - DirServer configuration lines now have an orport= option so
176 clients can open encrypted tunnels to the authorities without
177 having downloaded their descriptors yet. Enabled for moria1,
178 moria2, tor26, and lefkada now in the default configuration.
179 - Directory servers are more willing to send a 503 "busy" if they
180 are near their write limit, especially for v1 directory requests.
181 Now they can use their limited bandwidth for actual Tor traffic.
182 - Clients track responses with status 503 from dirservers. After a
183 dirserver has given us a 503, we try not to use it until an hour has
184 gone by, or until we have no dirservers that haven't given us a 503.
185 - When we get a 503 from a directory, and we're not a server, we don't
186 count the failure against the total number of failures allowed
187 for the thing we're trying to download.
188 - Report X-Your-Address-Is correctly from tunneled directory
189 connections; don't report X-Your-Address-Is when it's an internal
190 address; and never believe reported remote addresses when they're
192 - Protect against an unlikely DoS attack on directory servers.
193 - Add a BadDirectory flag to network status docs so that authorities
194 can (eventually) tell clients about caches they believe to be
197 o Minor features (controller):
198 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
199 - Reimplement GETINFO so that info/names stays in sync with the
201 - Implement "GETINFO fingerprint".
202 - Implement "SETEVENTS GUARD" so controllers can get updates on
203 entry guard status as it changes.
205 o Minor features (clean up obsolete pieces):
206 - Remove some options that have been deprecated since at least
207 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
208 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
210 - We no longer look for identity and onion keys in "identity.key" and
211 "onion.key" -- these were replaced by secret_id_key and
212 secret_onion_key in 0.0.8pre1.
213 - We no longer require unrecognized directory entries to be
216 o Major bugfixes (security):
217 - Stop sending the HttpProxyAuthenticator string to directory
218 servers when directory connections are tunnelled through Tor.
219 - Clients no longer store bandwidth history in the state file.
220 - Do not log introduction points for hidden services if SafeLogging
222 - When generating bandwidth history, round down to the nearest
223 1k. When storing accounting data, round up to the nearest 1k.
224 - When we're running as a server, remember when we last rotated onion
225 keys, so that we will rotate keys once they're a week old even if
226 we never stay up for a week ourselves.
228 o Major bugfixes (other):
229 - Fix a longstanding bug in eventdns that prevented the count of
230 timed-out resolves from ever being reset. This bug caused us to
231 give up on a nameserver the third time it timed out, and try it
232 10 seconds later... and to give up on it every time it timed out
234 - Take out the '5 second' timeout from the connection retry
235 schedule. Now the first connect attempt will wait a full 10
236 seconds before switching to a new circuit. Perhaps this will help
237 a lot. Based on observations from Mike Perry.
238 - Fix a bug on the Windows implementation of tor_mmap_file() that
239 would prevent the cached-routers file from ever loading. Reported
243 - Fix an assert failure when a directory authority sets
244 AuthDirRejectUnlisted and then receives a descriptor from an
245 unlisted router. Reported by seeess.
246 - Avoid a double-free when parsing malformed DirServer lines.
247 - Fix a bug when a BSD-style PF socket is first used. Patch from
249 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
250 to resolve an address at a given exit node even when they ask for
252 - Servers no longer ever list themselves in their "family" line,
253 even if configured to do so. This makes it easier to configure
254 family lists conveniently.
255 - When running as a server, don't fall back to 127.0.0.1 when no
256 nameservers are configured in /etc/resolv.conf; instead, make the
257 user fix resolv.conf or specify nameservers explicitly. (Resolves
259 - Stop accepting certain malformed ports in configured exit policies.
260 - Don't re-write the fingerprint file every restart, unless it has
262 - Stop warning when a single nameserver fails: only warn when _all_ of
263 our nameservers have failed. Also, when we only have one nameserver,
264 raise the threshold for deciding that the nameserver is dead.
265 - Directory authorities now only decide that routers are reachable
266 if their identity keys are as expected.
267 - When the user uses bad syntax in the Log config line, stop
268 suggesting other bad syntax as a replacement.
269 - Correctly detect ipv6 DNS capability on OpenBSD.
271 o Minor bugfixes (controller):
272 - Report the circuit number correctly in STREAM CLOSED events. Bug
273 reported by Mike Perry.
274 - Do not report bizarre values for results of accounting GETINFOs
275 when the last second's write or read exceeds the allotted bandwidth.
276 - Report "unrecognized key" rather than an empty string when the
277 controller tries to fetch a networkstatus that doesn't exist.
280 Changes in version 0.1.2.4-alpha - 2006-12-03
282 - Add support for using natd; this allows FreeBSDs earlier than
283 5.1.2 to have ipfw send connections through Tor without using
284 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
287 - Make all connections to addresses of the form ".noconnect"
288 immediately get closed. This lets application/controller combos
289 successfully test whether they're talking to the same Tor by
290 watching for STREAM events.
291 - Make cross.sh cross-compilation script work even when autogen.sh
292 hasn't been run. (Patch from Michael Mohr.)
293 - Statistics dumped by -USR2 now include a breakdown of public key
294 operations, for profiling.
297 - Fix a major leak when directory authorities parse their
298 approved-routers list, a minor memory leak when we fail to pick
299 an exit node, and a few rare leaks on errors.
300 - Handle TransPort connections even when the server sends data before
301 the client sends data. Previously, the connection would just hang
302 until the client sent data. (Patch from tup based on patch from
304 - Avoid assert failure when our cached-routers file is empty on
308 - Don't log spurious warnings when we see a circuit close reason we
309 don't recognize; it's probably just from a newer version of Tor.
310 - Have directory authorities allow larger amounts of drift in uptime
311 without replacing the server descriptor: previously, a server that
312 restarted every 30 minutes could have 48 "interesting" descriptors
314 - Start linking to the Tor specification and Tor reference manual
315 correctly in the Windows installer.
316 - Add Vidalia to the OS X uninstaller script, so when we uninstall
317 Tor/Privoxy we also uninstall Vidalia.
318 - Resume building on Irix64, and fix a lot of warnings from its
320 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
321 when we're running as a client.
324 Changes in version 0.1.2.3-alpha - 2006-10-29
326 - Prepare for servers to publish descriptors less often: never
327 discard a descriptor simply for being too old until either it is
328 recommended by no authorities, or until we get a better one for
329 the same router. Make caches consider retaining old recommended
330 routers for even longer.
331 - If most authorities set a BadExit flag for a server, clients
332 don't think of it as a general-purpose exit. Clients only consider
333 authorities that advertise themselves as listing bad exits.
334 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
335 headers for content, so that we can work better in the presence of
336 caching HTTP proxies.
337 - Allow authorities to list nodes as bad exits by fingerprint or by
340 o Minor features, controller:
341 - Add a REASON field to CIRC events; for backward compatibility, this
342 field is sent only to controllers that have enabled the extended
343 event format. Also, add additional reason codes to explain why
344 a given circuit has been destroyed or truncated. (Patches from
346 - Add a REMOTE_REASON field to extended CIRC events to tell the
347 controller about why a remote OR told us to close a circuit.
348 - Stream events also now have REASON and REMOTE_REASON fields,
349 working much like those for circuit events.
350 - There's now a GETINFO ns/... field so that controllers can ask Tor
351 about the current status of a router.
352 - A new event type "NS" to inform a controller when our opinion of
353 a router's status has changed.
354 - Add a GETINFO events/names and GETINFO features/names so controllers
355 can tell which events and features are supported.
356 - A new CLEARDNSCACHE signal to allow controllers to clear the
357 client-side DNS cache without expiring circuits.
360 - When the user sends a NEWNYM signal, clear the client-side DNS
361 cache too. Otherwise we continue to act on previous information.
364 - Avoid sending junk to controllers or segfaulting when a controller
365 uses EVENT_NEW_DESC with verbose nicknames.
366 - Stop triggering asserts if the controller tries to extend hidden
367 service circuits (reported by mwenge).
368 - Avoid infinite loop on unexpected controller input.
369 - When the controller does a "GETINFO network-status", tell it
370 about even those routers whose descriptors are very old, and use
371 long nicknames where appropriate.
372 - Change NT service functions to be loaded on demand. This lets us
373 build with MinGW without breaking Tor for Windows 98 users.
374 - Do DirPort reachability tests less often, since a single test
375 chews through many circuits before giving up.
376 - In the hidden service example in torrc.sample, stop recommending
377 esoteric and discouraged hidden service options.
378 - When stopping an NT service, wait up to 10 sec for it to actually
379 stop. (Patch from Matt Edman; resolves bug 295.)
380 - Fix handling of verbose nicknames with ORCONN controller events:
381 make them show up exactly when requested, rather than exactly when
383 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
384 printing a duplicate "$" in the keys we send (reported by mwenge).
385 - Correctly set maximum connection limit on Cygwin. (This time
387 - Try to detect Windows correctly when cross-compiling.
388 - Detect the size of the routers file correctly even if it is
389 corrupted (on systems without mmap) or not page-aligned (on systems
390 with mmap). This bug was harmless.
391 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
392 to open a stream fails; now we do in more cases. This should
393 make clients able to find a good exit faster in some cases, since
394 unhandleable requests will now get an error rather than timing out.
395 - Resolve two memory leaks when rebuilding the on-disk router cache
396 (reported by fookoowa).
397 - Clean up minor code warnings suggested by the MIPSpro C compiler,
398 and reported by some Centos users.
399 - Controller signals now work on non-Unix platforms that don't define
400 SIGUSR1 and SIGUSR2 the way we expect.
401 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
402 values before failing, and always enables eventdns.
403 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
404 Try to fix this in configure.in by checking for most functions
405 before we check for libevent.
408 Changes in version 0.1.2.2-alpha - 2006-10-07
410 - Make our async eventdns library on-by-default for Tor servers,
411 and plan to deprecate the separate dnsworker threads.
412 - Add server-side support for "reverse" DNS lookups (using PTR
413 records so clients can determine the canonical hostname for a given
414 IPv4 address). Only supported by servers using eventdns; servers
415 now announce in their descriptors whether they support eventdns.
416 - Specify and implement client-side SOCKS5 interface for reverse DNS
417 lookups (see doc/socks-extensions.txt).
418 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
419 connect to directory servers through Tor. Previously, clients needed
420 to find Tor exits to make private connections to directory servers.
421 - Avoid choosing Exit nodes for entry or middle hops when the
422 total bandwidth available from non-Exit nodes is much higher than
423 the total bandwidth available from Exit nodes.
424 - Workaround for name servers (like Earthlink's) that hijack failing
425 DNS requests and replace the no-such-server answer with a "helpful"
426 redirect to an advertising-driven search portal. Also work around
427 DNS hijackers who "helpfully" decline to hijack known-invalid
428 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
429 lets you turn it off.
430 - Send out a burst of long-range padding cells once we've established
431 that we're reachable. Spread them over 4 circuits, so hopefully
432 a few will be fast. This exercises our bandwidth and bootstraps
433 us into the directory more quickly.
435 o New/improved config options:
436 - Add new config option "ResolvConf" to let the server operator
437 choose an alternate resolve.conf file when using eventdns.
438 - Add an "EnforceDistinctSubnets" option to control our "exclude
439 servers on the same /16" behavior. It's still on by default; this
440 is mostly for people who want to operate private test networks with
441 all the machines on the same subnet.
442 - If one of our entry guards is on the ExcludeNodes list, or the
443 directory authorities don't think it's a good guard, treat it as
444 if it were unlisted: stop using it as a guard, and throw it off
445 the guards list if it stays that way for a long time.
446 - Allow directory authorities to be marked separately as authorities
447 for the v1 directory protocol, the v2 directory protocol, and
448 as hidden service directories, to make it easier to retire old
449 authorities. V1 authorities should set "HSAuthoritativeDir 1"
450 to continue being hidden service authorities too.
451 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
453 o Minor features, controller:
454 - Fix CIRC controller events so that controllers can learn the
455 identity digests of non-Named servers used in circuit paths.
456 - Let controllers ask for more useful identifiers for servers. Instead
457 of learning identity digests for un-Named servers and nicknames
458 for Named servers, the new identifiers include digest, nickname,
459 and indication of Named status. Off by default; see control-spec.txt
460 for more information.
461 - Add a "getinfo address" controller command so it can display Tor's
462 best guess to the user.
463 - New controller event to alert the controller when our server
464 descriptor has changed.
465 - Give more meaningful errors on controller authentication failure.
467 o Minor features, other:
468 - When asked to resolve a hostname, don't use non-exit servers unless
469 requested to do so. This allows servers with broken DNS to be
470 useful to the network.
471 - Divide eventdns log messages into warn and info messages.
472 - Reserve the nickname "Unnamed" for routers that can't pick
473 a hostname: any router can call itself Unnamed; directory
474 authorities will never allocate Unnamed to any particular router;
475 clients won't believe that any router is the canonical Unnamed.
476 - Only include function names in log messages for info/debug messages.
477 For notice/warn/err, the content of the message should be clear on
478 its own, and printing the function name only confuses users.
479 - Avoid some false positives during reachability testing: don't try
480 to test via a server that's on the same /24 as us.
481 - If we fail to build a circuit to an intended enclave, and it's
482 not mandatory that we use that enclave, stop wanting it.
483 - When eventdns is enabled, allow multithreaded builds on NetBSD and
484 OpenBSD. (We had previously disabled threads on these platforms
485 because they didn't have working thread-safe resolver functions.)
487 o Major bugfixes, anonymity/security:
488 - If a client asked for a server by name, and there's a named server
489 in our network-status but we don't have its descriptor yet, we
490 could return an unnamed server instead.
491 - Fix NetBSD bug that could allow someone to force uninitialized RAM
492 to be sent to a server's DNS resolver. This only affects NetBSD
493 and other platforms that do not bounds-check tolower().
494 - Reject (most) attempts to use Tor circuits with length one. (If
495 many people start using Tor as a one-hop proxy, exit nodes become
496 a more attractive target for compromise.)
497 - Just because your DirPort is open doesn't mean people should be
498 able to remotely teach you about hidden service descriptors. Now
499 only accept rendezvous posts if you've got HSAuthoritativeDir set.
501 o Major bugfixes, other:
502 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
503 - When a client asks the server to resolve (not connect to)
504 an address, and it has a cached answer, give them the cached answer.
505 Previously, the server would give them no answer at all.
506 - Allow really slow clients to not hang up five minutes into their
507 directory downloads (suggested by Adam J. Richter).
508 - We were building exactly the wrong circuits when we anticipated
509 hidden service requirements, meaning Tor would have to build all
510 its circuits on demand.
511 - Avoid crashing when we mmap a router cache file of size 0.
512 - When testing reachability of our DirPort, don't launch new
513 tests when there's already one in progress -- unreachable
514 servers were stacking up dozens of testing streams.
516 o Minor bugfixes, correctness:
517 - If we're a directory mirror and we ask for "all" network status
518 documents, we would discard status documents from authorities
520 - Avoid a memory corruption bug when creating a hash table for
522 - Avoid controller-triggered crash when misusing certain commands
523 from a v0 controller on platforms that do not handle
524 printf("%s",NULL) gracefully.
525 - Don't crash when a controller sends a third argument to an
526 "extendcircuit" request.
527 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
528 response; fix error code when "getinfo dir/status/" fails.
529 - Avoid crash when telling controller stream-status and a stream
531 - Patch from Adam Langley to fix assert() in eventdns.c.
532 - Fix a debug log message in eventdns to say "X resolved to Y"
533 instead of "X resolved to X".
534 - Make eventdns give strings for DNS errors, not just error numbers.
535 - Track unreachable entry guards correctly: don't conflate
536 'unreachable by us right now' with 'listed as down by the directory
537 authorities'. With the old code, if a guard was unreachable by
538 us but listed as running, it would clog our guard list forever.
539 - Behave correctly in case we ever have a network with more than
540 2GB/s total advertised capacity.
541 - Make TrackExitHosts case-insensitive, and fix the behavior of
542 ".suffix" TrackExitHosts items to avoid matching in the middle of
544 - Finally fix the openssl warnings from newer gccs that believe that
545 ignoring a return value is okay, but casting a return value and
546 then ignoring it is a sign of madness.
547 - Prevent the contrib/exitlist script from printing the same
548 result more than once.
549 - Patch from Steve Hildrey: Generate network status correctly on
550 non-versioning dirservers.
551 - Don't listen to the X-Your-Address-Is hint if you did the lookup
552 via Tor; otherwise you'll think you're the exit node's IP address.
554 o Minor bugfixes, performance:
555 - Two small performance improvements on parsing descriptors.
556 - Major performance improvement on inserting descriptors: change
557 algorithm from O(n^2) to O(n).
558 - Make the common memory allocation path faster on machines where
559 malloc(0) returns a pointer.
560 - Start remembering X-Your-Address-Is directory hints even if you're
561 a client, so you can become a server more smoothly.
562 - Avoid duplicate entries on MyFamily line in server descriptor.
564 o Packaging, features:
565 - Remove architecture from OS X builds. The official builds are
566 now universal binaries.
567 - The Debian package now uses --verify-config when (re)starting,
568 to distinguish configuration errors from other errors.
569 - Update RPMs to require libevent 1.1b.
571 o Packaging, bugfixes:
572 - Patches so Tor builds with MinGW on Windows.
573 - Patches so Tor might run on Cygwin again.
574 - Resume building on non-gcc compilers and ancient gcc. Resume
575 building with the -O0 compile flag. Resume building cleanly on
577 - Run correctly on OS X platforms with case-sensitive filesystems.
578 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
579 - Add autoconf checks so Tor can build on Solaris x86 again.
582 - Documented (and renamed) ServerDNSSearchDomains and
583 ServerDNSResolvConfFile options.
584 - Be clearer that the *ListenAddress directives can be repeated
588 Changes in version 0.1.2.1-alpha - 2006-08-27
590 - Add "eventdns" async dns library from Adam Langley, tweaked to
591 build on OSX and Windows. Only enabled if you pass the
592 --enable-eventdns argument to configure.
593 - Allow servers with no hostname or IP address to learn their
594 IP address by asking the directory authorities. This code only
595 kicks in when you would normally have exited with a "no address"
596 error. Nothing's authenticated, so use with care.
597 - Rather than waiting a fixed amount of time between retrying
598 application connections, we wait only 5 seconds for the first,
599 10 seconds for the second, and 15 seconds for each retry after
600 that. Hopefully this will improve the expected user experience.
601 - Patch from Tup to add support for transparent AP connections:
602 this basically bundles the functionality of trans-proxy-tor
603 into the Tor mainline. Now hosts with compliant pf/netfilter
604 implementations can redirect TCP connections straight to Tor
605 without diverting through SOCKS. Needs docs.
606 - Busy directory servers save lots of memory by spooling server
607 descriptors, v1 directories, and v2 networkstatus docs to buffers
608 as needed rather than en masse. Also mmap the cached-routers
609 files, so we don't need to keep the whole thing in memory too.
610 - Automatically avoid picking more than one node from the same
611 /16 network when constructing a circuit.
612 - Revise and clean up the torrc.sample that we ship with; add
613 a section for BandwidthRate and BandwidthBurst.
616 - Split circuit_t into origin_circuit_t and or_circuit_t, and
617 split connection_t into edge, or, dir, control, and base structs.
618 These will save quite a bit of memory on busy servers, and they'll
619 also help us track down bugs in the code and bugs in the spec.
620 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
621 or later. Log when we are doing this, so we can diagnose it when
622 it fails. (Also, recommend libevent 1.1b for kqueue and
623 win32 methods; deprecate libevent 1.0b harder; make libevent
624 recommendation system saner.)
625 - Start being able to build universal binaries on OS X (thanks
627 - Export the default exit policy via the control port, so controllers
628 don't need to guess what it is / will be later.
629 - Add a man page entry for ProtocolWarnings.
630 - Add TestVia config option to the man page.
631 - Remove even more protocol-related warnings from Tor server logs,
632 such as bad TLS handshakes and malformed begin cells.
633 - Stop fetching descriptors if you're not a dir mirror and you
634 haven't tried to establish any circuits lately. [This currently
635 causes some dangerous behavior, because when you start up again
636 you'll use your ancient server descriptors.]
637 - New DirPort behavior: if you have your dirport set, you download
638 descriptors aggressively like a directory mirror, whether or not
640 - Get rid of the router_retry_connections notion. Now routers
641 no longer try to rebuild long-term connections to directory
642 authorities, and directory authorities no longer try to rebuild
643 long-term connections to all servers. We still don't hang up
644 connections in these two cases though -- we need to look at it
645 more carefully to avoid flapping, and we likely need to wait til
647 - Drop compatibility with obsolete Tors that permit create cells
648 to have the wrong circ_id_type.
649 - Re-enable per-connection rate limiting. Get rid of the "OP
650 bandwidth" concept. Lay groundwork for "bandwidth classes" --
651 separate global buckets that apply depending on what sort of conn
653 - Start publishing one minute or so after we find our ORPort
654 to be reachable. This will help reduce the number of descriptors
655 we have for ourselves floating around, since it's quite likely
656 other things (e.g. DirPort) will change during that minute too.
657 - Fork the v1 directory protocol into its own spec document,
658 and mark dir-spec.txt as the currently correct (v2) spec.
661 - When we find our DirPort to be reachable, publish a new descriptor
662 so we'll tell the world (reported by pnx).
663 - Publish a new descriptor after we hup/reload. This is important
664 if our config has changed such that we'll want to start advertising
665 our DirPort now, etc.
666 - Allow Tor to start when RunAsDaemon is set but no logs are set.
667 - When we have a state file we cannot parse, tell the user and
668 move it aside. Now we avoid situations where the user starts
669 Tor in 1904, Tor writes a state file with that timestamp in it,
670 the user fixes her clock, and Tor refuses to start.
671 - Fix configure.in to not produce broken configure files with
672 more recent versions of autoconf. Thanks to Clint for his auto*
674 - "tor --verify-config" now exits with -1(255) or 0 depending on
675 whether the config options are bad or good.
676 - Resolve bug 321 when using dnsworkers: append a period to every
677 address we resolve at the exit node, so that we do not accidentally
678 pick up local addresses, and so that failing searches are retried
679 in the resolver search domains. (This is already solved for
680 eventdns.) (This breaks Blossom servers for now.)
681 - If we are using an exit enclave and we can't connect, e.g. because
682 its webserver is misconfigured to not listen on localhost, then
683 back off and try connecting from somewhere else before we fail.
686 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
687 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
688 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
689 when the IP address is mapped through MapAddress to a hostname.
690 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
691 useless IPv6 DNS resolves.
692 - Patch suggested by Karsten Loesing: respond to SIGNAL command
693 before we execute the signal, in case the signal shuts us down.
694 - Clean up AllowInvalidNodes man page entry.
695 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
696 - Add more asserts to track down an assert error on a windows Tor
697 server with connection_add being called with socket == -1.
698 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
699 - Fix misleading log messages: an entry guard that is "unlisted",
700 as well as not known to be "down" (because we've never heard
701 of it), is not therefore "up".
702 - Remove code to special-case "-cvs" ending, since it has not
703 actually mattered since 0.0.9.
704 - Make our socks5 handling more robust to broken socks clients:
705 throw out everything waiting on the buffer in between socks
706 handshake phases, since they can't possibly (so the theory
707 goes) have predicted what we plan to respond to them.
710 Changes in version 0.1.1.26 - 2006-12-14
712 - Stop sending the HttpProxyAuthenticator string to directory
713 servers when directory connections are tunnelled through Tor.
714 - Clients no longer store bandwidth history in the state file.
715 - Do not log introduction points for hidden services if SafeLogging
719 - Fix an assert failure when a directory authority sets
720 AuthDirRejectUnlisted and then receives a descriptor from an
721 unlisted router (reported by seeess).
724 Changes in version 0.1.1.25 - 2006-11-04
726 - When a client asks us to resolve (rather than connect to)
727 an address, and we have a cached answer, give them the cached
728 answer. Previously, we would give them no answer at all.
729 - We were building exactly the wrong circuits when we predict
730 hidden service requirements, meaning Tor would have to build all
731 its circuits on demand.
732 - If none of our live entry guards have a high uptime, but we
733 require a guard with a high uptime, try adding a new guard before
734 we give up on the requirement. This patch should make long-lived
735 connections more stable on average.
736 - When testing reachability of our DirPort, don't launch new
737 tests when there's already one in progress -- unreachable
738 servers were stacking up dozens of testing streams.
741 - When the user sends a NEWNYM signal, clear the client-side DNS
742 cache too. Otherwise we continue to act on previous information.
745 - Avoid a memory corruption bug when creating a hash table for
747 - Avoid possibility of controller-triggered crash when misusing
748 certain commands from a v0 controller on platforms that do not
749 handle printf("%s",NULL) gracefully.
750 - Avoid infinite loop on unexpected controller input.
751 - Don't log spurious warnings when we see a circuit close reason we
752 don't recognize; it's probably just from a newer version of Tor.
753 - Add Vidalia to the OS X uninstaller script, so when we uninstall
754 Tor/Privoxy we also uninstall Vidalia.
757 Changes in version 0.1.1.24 - 2006-09-29
759 - Allow really slow clients to not hang up five minutes into their
760 directory downloads (suggested by Adam J. Richter).
761 - Fix major performance regression from 0.1.0.x: instead of checking
762 whether we have enough directory information every time we want to
763 do something, only check when the directory information has changed.
764 This should improve client CPU usage by 25-50%.
765 - Don't crash if, after a server has been running for a while,
766 it can't resolve its hostname.
767 - When a client asks us to resolve (not connect to) an address,
768 and we have a cached answer, give them the cached answer.
769 Previously, we would give them no answer at all.
772 - Allow Tor to start when RunAsDaemon is set but no logs are set.
773 - Don't crash when the controller receives a third argument to an
774 "extendcircuit" request.
775 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
776 response; fix error code when "getinfo dir/status/" fails.
777 - Fix configure.in to not produce broken configure files with
778 more recent versions of autoconf. Thanks to Clint for his auto*
780 - Fix security bug on NetBSD that could allow someone to force
781 uninitialized RAM to be sent to a server's DNS resolver. This
782 only affects NetBSD and other platforms that do not bounds-check
784 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
785 methods: these are known to be buggy.
786 - If we're a directory mirror and we ask for "all" network status
787 documents, we would discard status documents from authorities
791 Changes in version 0.1.1.23 - 2006-07-30
793 - Fast Tor servers, especially exit nodes, were triggering asserts
794 due to a bug in handling the list of pending DNS resolves. Some
795 bugs still remain here; we're hunting them.
796 - Entry guards could crash clients by sending unexpected input.
797 - More fixes on reachability testing: if you find yourself reachable,
798 then don't ever make any client requests (so you stop predicting
799 circuits), then hup or have your clock jump, then later your IP
800 changes, you won't think circuits are working, so you won't try to
801 test reachability, so you won't publish.
804 - Avoid a crash if the controller does a resetconf firewallports
805 and then a setconf fascistfirewall=1.
806 - Avoid an integer underflow when the dir authority decides whether
807 a router is stable: we might wrongly label it stable, and compute
808 a slightly wrong median stability, when a descriptor is published
810 - Fix a place where we might trigger an assert if we can't build our
811 own server descriptor yet.
814 Changes in version 0.1.1.22 - 2006-07-05
816 - Fix a big bug that was causing servers to not find themselves
817 reachable if they changed IP addresses. Since only 0.1.1.22+
818 servers can do reachability testing correctly, now we automatically
819 make sure to test via one of these.
820 - Fix to allow clients and mirrors to learn directory info from
821 descriptor downloads that get cut off partway through.
822 - Directory authorities had a bug in deciding if a newly published
823 descriptor was novel enough to make everybody want a copy -- a few
824 servers seem to be publishing new descriptors many times a minute.
826 - Fix a rare bug that was causing some servers to complain about
827 "closing wedged cpuworkers" and skip some circuit create requests.
828 - Make the Exit flag in directory status documents actually work.
831 Changes in version 0.1.1.21 - 2006-06-10
832 o Crash and assert fixes from 0.1.1.20:
833 - Fix a rare crash on Tor servers that have enabled hibernation.
834 - Fix a seg fault on startup for Tor networks that use only one
836 - Fix an assert from a race condition that occurs on Tor servers
837 while exiting, where various threads are trying to log that they're
838 exiting, and delete the logs, at the same time.
839 - Make our unit tests pass again on certain obscure platforms.
842 - Add support for building SUSE RPM packages.
843 - Speed up initial bootstrapping for clients: if we are making our
844 first ever connection to any entry guard, then don't mark it down
846 - When only one Tor server in the network is labelled as a guard,
847 and we've already picked him, we would cycle endlessly picking him
848 again, being unhappy about it, etc. Now we specifically exclude
849 current guards when picking a new guard.
850 - Servers send create cells more reliably after the TLS connection
851 is established: we were sometimes forgetting to send half of them
852 when we had more than one pending.
853 - If we get a create cell that asks us to extend somewhere, but the
854 Tor server there doesn't match the expected digest, we now send
855 a destroy cell back, rather than silently doing nothing.
856 - Make options->RedirectExit work again.
857 - Make cookie authentication for the controller work again.
858 - Stop being picky about unusual characters in the arguments to
859 mapaddress. It's none of our business.
860 - Add a new config option "TestVia" that lets you specify preferred
861 middle hops to use for test circuits. Perhaps this will let me
862 debug the reachability problems better.
864 o Log / documentation fixes:
865 - If we're a server and some peer has a broken TLS certificate, don't
866 log about it unless ProtocolWarnings is set, i.e., we want to hear
867 about protocol violations by others.
868 - Fix spelling of VirtualAddrNetwork in man page.
869 - Add a better explanation at the top of the autogenerated torrc file
870 about what happened to our old torrc.
873 Changes in version 0.1.1.20 - 2006-05-23
875 - Downgrade a log severity where servers complain that they're
877 - Avoid a compile warning on FreeBSD.
878 - Remove string size limit on NEWDESC messages; solve bug 291.
879 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
880 more thoroughly when we're running on windows.
883 Changes in version 0.1.1.19-rc - 2006-05-03
885 - Regenerate our local descriptor if it's dirty and we try to use
886 it locally (e.g. if it changes during reachability detection).
887 - If we setconf our ORPort to 0, we continued to listen on the
888 old ORPort and receive connections.
889 - Avoid a second warning about machine/limits.h on Debian
891 - Be willing to add our own routerinfo into the routerlist.
892 Now authorities will include themselves in their directories
893 and network-statuses.
894 - Stop trying to upload rendezvous descriptors to every
895 directory authority: only try the v1 authorities.
896 - Servers no longer complain when they think they're not
897 registered with the directory authorities. There were too many
899 - Backport dist-rpm changes so rpms can be built without errors.
902 - Implement an option, VirtualAddrMask, to set which addresses
903 get handed out in response to mapaddress requests. This works
904 around a bug in tsocks where 127.0.0.0/8 is never socksified.
907 Changes in version 0.1.1.18-rc - 2006-04-10
909 - Work harder to download live network-statuses from all the
910 directory authorities we know about. Improve the threshold
911 decision logic so we're more robust to edge cases.
912 - When fetching rendezvous descriptors, we were willing to ask
913 v2 authorities too, which would always return 404.
916 - Stop listing down or invalid nodes in the v1 directory. This will
917 reduce its bulk by about 1/3, and reduce load on directory
919 - When deciding whether a router is Fast or Guard-worthy, consider
920 his advertised BandwidthRate and not just the BandwidthCapacity.
921 - No longer ship INSTALL and README files -- they are useless now.
922 - Force rpmbuild to behave and honor target_cpu.
923 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
924 - Start to include translated versions of the tor-doc-*.html
925 files, along with the screenshots. Still needs more work.
926 - Start sending back 512 and 451 errors if mapaddress fails,
927 rather than not sending anything back at all.
928 - When we fail to bind or listen on an incoming or outgoing
929 socket, we should close it before failing. otherwise we just
930 leak it. (thanks to weasel for finding.)
931 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
932 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
933 - Make NoPublish (even though deprecated) work again.
934 - Fix a minor security flaw where a versioning auth dirserver
935 could list a recommended version many times in a row to make
936 clients more convinced that it's recommended.
937 - Fix crash bug if there are two unregistered servers running
938 with the same nickname, one of them is down, and you ask for
939 them by nickname in your EntryNodes or ExitNodes. Also, try
940 to pick the one that's running rather than an arbitrary one.
941 - Fix an infinite loop we could hit if we go offline for too long.
942 - Complain when we hit WSAENOBUFS on recv() or write() too.
943 Perhaps this will help us hunt the bug.
944 - If you're not a versioning dirserver, don't put the string
945 "client-versions \nserver-versions \n" in your network-status.
946 - Lower the minimum required number of file descriptors to 1000,
947 so we can have some overhead for Valgrind on Linux, where the
948 default ulimit -n is 1024.
951 - Add tor.dizum.com as the fifth authoritative directory server.
952 - Add a new config option FetchUselessDescriptors, off by default,
953 for when you plan to run "exitlist" on your client and you want
954 to know about even the non-running descriptors.
957 Changes in version 0.1.1.17-rc - 2006-03-28
959 - Clients and servers since 0.1.1.10-alpha have been expiring
960 connections whenever they are idle for 5 minutes and they *do*
961 have circuits on them. Oops. With this new version, clients will
962 discard their previous entry guard choices and avoid choosing
963 entry guards running these flawed versions.
964 - Fix memory leak when uncompressing concatenated zlib streams. This
965 was causing substantial leaks over time on Tor servers.
966 - The v1 directory was including servers as much as 48 hours old,
967 because that's how the new routerlist->routers works. Now only
968 include them if they're 20 hours old or less.
971 - Resume building on irix64, netbsd 2.0, etc.
972 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
974 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
975 and it is confusing some users.
976 - Mirrors stop caching the v1 directory so often.
977 - Make the max number of old descriptors that a cache will hold
978 rise with the number of directory authorities, so we can scale.
979 - Change our win32 uname() hack to be more forgiving about what
980 win32 versions it thinks it's found.
983 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
985 - When the controller's *setconf commands fail, collect an error
986 message in a string and hand it back to the controller.
987 - Make the v2 dir's "Fast" flag based on relative capacity, just
988 like "Stable" is based on median uptime. Name everything in the
989 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
990 - Log server fingerprint on startup, so new server operators don't
991 have to go hunting around their filesystem for it.
992 - Return a robots.txt on our dirport to discourage google indexing.
993 - Let the controller ask for GETINFO dir/status/foo so it can ask
994 directly rather than connecting to the dir port. Only works when
995 dirport is set for now.
997 o New config options rather than constants in the code:
998 - SocksTimeout: How long do we let a socks connection wait
999 unattached before we fail it?
1000 - CircuitBuildTimeout: Cull non-open circuits that were born
1001 at least this many seconds ago.
1002 - CircuitIdleTimeout: Cull open clean circuits that were born
1003 at least this many seconds ago.
1006 Changes in version 0.1.1.16-rc - 2006-03-18
1007 o Bugfixes on 0.1.1.15-rc:
1008 - Fix assert when the controller asks to attachstream a connect-wait
1009 or resolve-wait stream.
1010 - Now do address rewriting when the controller asks us to attach
1011 to a particular circuit too. This will let Blossom specify
1012 "moria2.exit" without having to learn what moria2's IP address is.
1013 - Make the "tor --verify-config" command-line work again, so people
1014 can automatically check if their torrc will parse.
1015 - Authoritative dirservers no longer require an open connection from
1016 a server to consider him "reachable". We need this change because
1017 when we add new auth dirservers, old servers won't know not to
1019 - Let Tor build on Sun CC again.
1020 - Fix an off-by-one buffer size in dirserv.c that magically never
1021 hit our three authorities but broke sjmurdoch's own tor network.
1022 - If we as a directory mirror don't know of any v1 directory
1023 authorities, then don't try to cache any v1 directories.
1024 - Stop warning about unknown servers in our family when they are
1025 given as hex digests.
1026 - Stop complaining as quickly to the server operator that he
1027 hasn't registered his nickname/key binding.
1028 - Various cleanups so we can add new V2 Auth Dirservers.
1029 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1030 reflect the updated flags in our v2 dir protocol.
1031 - Resume allowing non-printable characters for exit streams (both
1032 for connecting and for resolving). Now we tolerate applications
1033 that don't follow the RFCs. But continue to block malformed names
1036 o Bugfixes on 0.1.0.x:
1037 - Fix assert bug in close_logs(): when we close and delete logs,
1038 remove them all from the global "logfiles" list.
1039 - Fix minor integer overflow in calculating when we expect to use up
1040 our bandwidth allocation before hibernating.
1041 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
1042 there are multiple SSLs installed with different versions.
1043 - When we try to be a server and Address is not explicitly set and
1044 our hostname resolves to a private IP address, try to use an
1045 interface address if it has a public address. Now Windows machines
1046 that think of themselves as localhost can work by default.
1049 - Let the controller ask for GETINFO dir/server/foo so it can ask
1050 directly rather than connecting to the dir port.
1051 - Let the controller tell us about certain router descriptors
1052 that it doesn't want Tor to use in circuits. Implement
1053 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
1054 - New config option SafeSocks to reject all application connections
1055 using unsafe socks protocols. Defaults to off.
1058 Changes in version 0.1.1.15-rc - 2006-03-11
1059 o Bugfixes and cleanups:
1060 - When we're printing strings from the network, don't try to print
1061 non-printable characters. This protects us against shell escape
1062 sequence exploits, and also against attacks to fool humans into
1063 misreading their logs.
1064 - Fix a bug where Tor would fail to establish any connections if you
1065 left it off for 24 hours and then started it: we were happy with
1066 the obsolete network statuses, but they all referred to router
1067 descriptors that were too old to fetch, so we ended up with no
1068 valid router descriptors.
1069 - Fix a seg fault in the controller's "getinfo orconn-status"
1070 command while listing status on incoming handshaking connections.
1071 Introduce a status name "NEW" for these connections.
1072 - If we get a linelist or linelist_s config option from the torrc
1073 (e.g. ExitPolicy) and it has no value, warn and skip rather than
1074 silently resetting it to its default.
1075 - Don't abandon entry guards until they've been down or gone for
1077 - Cleaner and quieter log messages.
1080 - New controller signal NEWNYM that makes new application requests
1082 - Add a new circuit purpose 'controller' to let the controller ask
1083 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
1084 controller command to let you specify the purpose if you're
1085 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
1086 command to let you change a circuit's purpose after it's been
1088 - Accept "private:*" in routerdesc exit policies; not generated yet
1089 because older Tors do not understand it.
1090 - Add BSD-style contributed startup script "rc.subr" from Peter
1094 Changes in version 0.1.1.14-alpha - 2006-02-20
1095 o Bugfixes on 0.1.1.x:
1096 - Don't die if we ask for a stdout or stderr log (even implicitly)
1097 and we're set to RunAsDaemon -- just warn.
1098 - We still had a few bugs in the OR connection rotation code that
1099 caused directory servers to slowly aggregate connections to other
1100 fast Tor servers. This time for sure!
1101 - Make log entries on Win32 include the name of the function again.
1102 - We were treating a pair of exit policies if they were equal even
1103 if one said accept and the other said reject -- causing us to
1104 not always publish a new descriptor since we thought nothing
1106 - Retry pending server downloads as well as pending networkstatus
1107 downloads when we unexpectedly get a socks request.
1108 - We were ignoring the IS_FAST flag in the directory status,
1109 meaning we were willing to pick trivial-bandwidth nodes for "fast"
1111 - If the controller's SAVECONF command fails (e.g. due to file
1112 permissions), let the controller know that it failed.
1115 - If we're trying to be a Tor server and running Windows 95/98/ME
1116 as a server, explain that we'll likely crash.
1117 - When we're a server, a client asks for an old-style directory,
1118 and our write bucket is empty, don't give it to him. This way
1119 small servers can continue to serve the directory *sometimes*,
1120 without getting overloaded.
1121 - Compress exit policies even more -- look for duplicate lines
1123 - Clients now honor the "guard" flag in the router status when
1124 picking entry guards, rather than looking at is_fast or is_stable.
1125 - Retain unrecognized lines in $DATADIR/state file, so that we can
1126 be forward-compatible.
1127 - Generate 18.0.0.0/8 address policy format in descs when we can;
1128 warn when the mask is not reducible to a bit-prefix.
1129 - Let the user set ControlListenAddress in the torrc. This can be
1130 dangerous, but there are some cases (like a secured LAN) where it
1132 - Split ReachableAddresses into ReachableDirAddresses and
1133 ReachableORAddresses, so we can restrict Dir conns to port 80
1134 and OR conns to port 443.
1135 - Now we can target arch and OS in rpm builds (contributed by
1136 Phobos). Also make the resulting dist-rpm filename match the
1138 - New config options to help controllers: FetchServerDescriptors
1139 and FetchHidServDescriptors for whether to fetch server
1140 info and hidserv info or let the controller do it, and
1141 PublishServerDescriptor and PublishHidServDescriptors.
1142 - Also let the controller set the __AllDirActionsPrivate config
1143 option if you want all directory fetches/publishes to happen via
1144 Tor (it assumes your controller bootstraps your circuits).
1147 Changes in version 0.1.0.17 - 2006-02-17
1148 o Crash bugfixes on 0.1.0.x:
1149 - When servers with a non-zero DirPort came out of hibernation,
1150 sometimes they would trigger an assert.
1152 o Other important bugfixes:
1153 - On platforms that don't have getrlimit (like Windows), we were
1154 artificially constraining ourselves to a max of 1024
1155 connections. Now just assume that we can handle as many as 15000
1156 connections. Hopefully this won't cause other problems.
1158 o Backported features:
1159 - When we're a server, a client asks for an old-style directory,
1160 and our write bucket is empty, don't give it to him. This way
1161 small servers can continue to serve the directory *sometimes*,
1162 without getting overloaded.
1163 - Whenever you get a 503 in response to a directory fetch, try
1164 once more. This will become important once servers start sending
1165 503's whenever they feel busy.
1166 - Fetch a new directory every 120 minutes, not every 40 minutes.
1167 Now that we have hundreds of thousands of users running the old
1168 directory algorithm, it's starting to hurt a lot.
1169 - Bump up the period for forcing a hidden service descriptor upload
1170 from 20 minutes to 1 hour.
1173 Changes in version 0.1.1.13-alpha - 2006-02-09
1174 o Crashes in 0.1.1.x:
1175 - When you tried to setconf ORPort via the controller, Tor would
1176 crash. So people using TorCP to become a server were sad.
1177 - Solve (I hope) the stack-smashing bug that we were seeing on fast
1178 servers. The problem appears to be something do with OpenSSL's
1179 random number generation, or how we call it, or something. Let me
1180 know if the crashes continue.
1181 - Turn crypto hardware acceleration off by default, until we find
1182 somebody smart who can test it for us. (It appears to produce
1183 seg faults in at least some cases.)
1184 - Fix a rare assert error when we've tried all intro points for
1185 a hidden service and we try fetching the service descriptor again:
1186 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
1189 - Fix a major load balance bug: we were round-robining in 16 KB
1190 chunks, and servers with bandwidthrate of 20 KB, while downloading
1191 a 600 KB directory, would starve their other connections. Now we
1192 try to be a bit more fair.
1193 - Dir authorities and mirrors were never expiring the newest
1194 descriptor for each server, causing memory and directory bloat.
1195 - Fix memory-bloating and connection-bloating bug on servers: We
1196 were never closing any connection that had ever had a circuit on
1197 it, because we were checking conn->n_circuits == 0, yet we had a
1198 bug that let it go negative.
1199 - Make Tor work using squid as your http proxy again -- squid
1200 returns an error if you ask for a URL that's too long, and it uses
1201 a really generic error message. Plus, many people are behind a
1202 transparent squid so they don't even realize it.
1203 - On platforms that don't have getrlimit (like Windows), we were
1204 artificially constraining ourselves to a max of 1024
1205 connections. Now just assume that we can handle as many as 15000
1206 connections. Hopefully this won't cause other problems.
1207 - Add a new config option ExitPolicyRejectPrivate which defaults to
1208 1. This means all exit policies will begin with rejecting private
1209 addresses, unless the server operator explicitly turns it off.
1212 - Clients not longer download descriptors for non-running
1214 - Before we add new directory authorities, we should make it
1215 clear that only v1 authorities should receive/publish hidden
1216 service descriptors.
1219 - As soon as we've fetched some more directory info, immediately
1220 try to download more server descriptors. This way we don't have
1221 a 10 second pause during initial bootstrapping.
1222 - Remove even more loud log messages that the server operator can't
1224 - When we're running an obsolete or un-recommended version, make
1225 the log message more clear about what the problem is and what
1226 versions *are* still recommended.
1227 - Provide a more useful warn message when our onion queue gets full:
1228 the CPU is too slow or the exit policy is too liberal.
1229 - Don't warn when we receive a 503 from a dirserver/cache -- this
1230 will pave the way for them being able to refuse if they're busy.
1231 - When we fail to bind a listener, try to provide a more useful
1232 log message: e.g., "Is Tor already running?"
1233 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
1234 Goldberg can prove things about our handshake protocol more
1236 - MaxConn has been obsolete for a while now. Document the ConnLimit
1237 config option, which is a *minimum* number of file descriptors
1238 that must be available else Tor refuses to start.
1239 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
1240 if you log to syslog and want something other than LOG_DAEMON.
1241 - Make dirservers generate a separate "guard" flag to mean,
1242 "would make a good entry guard". Make clients parse it and vote
1243 on it. Not used by clients yet.
1244 - Implement --with-libevent-dir option to ./configure. Also, improve
1245 search techniques to find libevent, and use those for openssl too.
1246 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
1247 - Only start testing reachability once we've established a
1248 circuit. This will make startup on dirservers less noisy.
1249 - Don't try to upload hidden service descriptors until we have
1250 established a circuit.
1251 - Fix the controller's "attachstream 0" command to treat conn like
1252 it just connected, doing address remapping, handling .exit and
1253 .onion idioms, and so on. Now we're more uniform in making sure
1254 that the controller hears about new and closing connections.
1257 Changes in version 0.1.1.12-alpha - 2006-01-11
1258 o Bugfixes on 0.1.1.x:
1259 - The fix to close duplicate server connections was closing all
1260 Tor client connections if they didn't establish a circuit
1261 quickly enough. Oops.
1262 - Fix minor memory issue (double-free) that happened on exit.
1264 o Bugfixes on 0.1.0.x:
1265 - Tor didn't warn when it failed to open a log file.
1268 Changes in version 0.1.1.11-alpha - 2006-01-10
1269 o Crashes in 0.1.1.x:
1270 - Include all the assert/crash fixes from 0.1.0.16.
1271 - If you start Tor and then quit very quickly, there were some
1272 races that tried to free things that weren't allocated yet.
1273 - Fix a rare memory stomp if you're running hidden services.
1274 - Fix segfault when specifying DirServer in config without nickname.
1275 - Fix a seg fault when you finish connecting to a server but at
1276 that moment you dump his server descriptor.
1277 - Extendcircuit and Attachstream controller commands would
1278 assert/crash if you don't give them enough arguments.
1279 - Fix an assert error when we're out of space in the connection_list
1280 and we try to post a hidden service descriptor (reported by weasel).
1281 - If you specify a relative torrc path and you set RunAsDaemon in
1282 your torrc, then it chdir()'s to the new directory. If you HUP,
1283 it tries to load the new torrc location, fails, and exits.
1284 The fix: no longer allow a relative path to torrc using -f.
1287 - Implement "entry guards": automatically choose a handful of entry
1288 nodes and stick with them for all circuits. Only pick new guards
1289 when the ones you have are unsuitable, and if the old guards
1290 become suitable again, switch back. This will increase security
1291 dramatically against certain end-point attacks. The EntryNodes
1292 config option now provides some hints about which entry guards you
1293 want to use most; and StrictEntryNodes means to only use those.
1294 - New directory logic: download by descriptor digest, not by
1295 fingerprint. Caches try to download all listed digests from
1296 authorities; clients try to download "best" digests from caches.
1297 This avoids partitioning and isolating attacks better.
1298 - Make the "stable" router flag in network-status be the median of
1299 the uptimes of running valid servers, and make clients pay
1300 attention to the network-status flags. Thus the cutoff adapts
1301 to the stability of the network as a whole, making IRC, IM, etc
1302 connections more reliable.
1305 - Tor servers with dynamic IP addresses were needing to wait 18
1306 hours before they could start doing reachability testing using
1307 the new IP address and ports. This is because they were using
1308 the internal descriptor to learn what to test, yet they were only
1309 rebuilding the descriptor once they decided they were reachable.
1310 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
1311 to download certain server descriptors, throw them away, and then
1312 fetch them again after 30 minutes. Now mirrors throw away these
1313 server descriptors so clients can't get them.
1314 - We were leaving duplicate connections to other ORs open for a week,
1315 rather than closing them once we detect a duplicate. This only
1316 really affected authdirservers, but it affected them a lot.
1317 - Spread the authdirservers' reachability testing over the entire
1318 testing interval, so we don't try to do 500 TLS's at once every
1322 - If the network is down, and we try to connect to a conn because
1323 we have a circuit in mind, and we timeout (30 seconds) because the
1324 network never answers, we were expiring the circuit, but we weren't
1325 obsoleting the connection or telling the entry_guards functions.
1326 - Some Tor servers process billions of cells per day. These statistics
1327 need to be uint64_t's.
1328 - Check for integer overflows in more places, when adding elements
1329 to smartlists. This could possibly prevent a buffer overflow
1330 on malicious huge inputs. I don't see any, but I haven't looked
1332 - ReachableAddresses kept growing new "reject *:*" lines on every
1334 - When you "setconf log" via the controller, it should remove all
1335 logs. We were automatically adding back in a "log notice stdout".
1336 - Newly bootstrapped Tor networks couldn't establish hidden service
1337 circuits until they had nodes with high uptime. Be more tolerant.
1338 - We were marking servers down when they could not answer every piece
1339 of the directory request we sent them. This was far too harsh.
1340 - Fix the torify (tsocks) config file to not use Tor for localhost
1342 - Directory authorities now go to the proper authority when asking for
1343 a networkstatus, even when they want a compressed one.
1344 - Fix a harmless bug that was causing Tor servers to log
1345 "Got an end because of misc error, but we're not an AP. Closing."
1346 - Authorities were treating their own descriptor changes as cosmetic,
1347 meaning the descriptor available in the network-status and the
1348 descriptor that clients downloaded were different.
1349 - The OS X installer was adding a symlink for tor_resolve but
1350 the binary was called tor-resolve (reported by Thomas Hardly).
1351 - Workaround a problem with some http proxies where they refuse GET
1352 requests that specify "Content-Length: 0" (reported by Adrian).
1353 - Fix wrong log message when you add a "HiddenServiceNodes" config
1354 line without any HiddenServiceDir line (reported by Chris Thomas).
1357 - Write the TorVersion into the state file so we have a prayer of
1358 keeping forward and backward compatibility.
1359 - Revive the FascistFirewall config option rather than eliminating it:
1360 now it's a synonym for ReachableAddresses *:80,*:443.
1361 - Clients choose directory servers from the network status lists,
1362 not from their internal list of router descriptors. Now they can
1363 go to caches directly rather than needing to go to authorities
1365 - Directory authorities ignore router descriptors that have only
1366 cosmetic differences: do this for 0.1.0.x servers now too.
1367 - Add a new flag to network-status indicating whether the server
1368 can answer v2 directory requests too.
1369 - Authdirs now stop whining so loudly about bad descriptors that
1370 they fetch from other dirservers. So when there's a log complaint,
1371 it's for sure from a freshly uploaded descriptor.
1372 - Reduce memory requirements in our structs by changing the order
1374 - There used to be two ways to specify your listening ports in a
1375 server descriptor: on the "router" line and with a separate "ports"
1376 line. Remove support for the "ports" line.
1377 - New config option "AuthDirRejectUnlisted" for auth dirservers as
1378 a panic button: if we get flooded with unusable servers we can
1379 revert to only listing servers in the approved-routers file.
1380 - Auth dir servers can now mark a fingerprint as "!reject" or
1381 "!invalid" in the approved-routers file (as its nickname), to
1382 refuse descriptors outright or include them but marked as invalid.
1383 - Servers store bandwidth history across restarts/crashes.
1384 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1385 get a better idea of why their circuits failed. Not used yet.
1386 - Directory mirrors now cache up to 16 unrecognized network-status
1387 docs. Now we can add new authdirservers and they'll be cached too.
1388 - When picking a random directory, prefer non-authorities if any
1390 - New controller option "getinfo desc/all-recent" to fetch the
1391 latest server descriptor for every router that Tor knows about.
1394 Changes in version 0.1.0.16 - 2006-01-02
1395 o Crash bugfixes on 0.1.0.x:
1396 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1397 corrupting the heap, losing FDs, or crashing when we need to resize
1398 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1399 - It turns out sparc64 platforms crash on unaligned memory access
1400 too -- so detect and avoid this.
1401 - Handle truncated compressed data correctly (by detecting it and
1403 - Fix possible-but-unlikely free(NULL) in control.c.
1404 - When we were closing connections, there was a rare case that
1405 stomped on memory, triggering seg faults and asserts.
1406 - Avoid potential infinite recursion when building a descriptor. (We
1407 don't know that it ever happened, but better to fix it anyway.)
1408 - We were neglecting to unlink marked circuits from soon-to-close OR
1409 connections, which caused some rare scribbling on freed memory.
1410 - Fix a memory stomping race bug when closing the joining point of two
1411 rendezvous circuits.
1412 - Fix an assert in time parsing found by Steven Murdoch.
1414 o Other bugfixes on 0.1.0.x:
1415 - When we're doing reachability testing, provide more useful log
1416 messages so the operator knows what to expect.
1417 - Do not check whether DirPort is reachable when we are suppressing
1418 advertising it because of hibernation.
1419 - When building with -static or on Solaris, we sometimes needed -ldl.
1420 - One of the dirservers (tor26) changed its IP address.
1421 - When we're deciding whether a stream has enough circuits around
1422 that can handle it, count the freshly dirty ones and not the ones
1423 that are so dirty they won't be able to handle it.
1424 - When we're expiring old circuits, we had a logic error that caused
1425 us to close new rendezvous circuits rather than old ones.
1426 - Give a more helpful log message when you try to change ORPort via
1427 the controller: you should upgrade Tor if you want that to work.
1428 - We were failing to parse Tor versions that start with "Tor ".
1429 - Tolerate faulty streams better: when a stream fails for reason
1430 exitpolicy, stop assuming that the router is lying about his exit
1431 policy. When a stream fails for reason misc, allow it to retry just
1432 as if it was resolvefailed. When a stream has failed three times,
1433 reset its failure count so we can try again and get all three tries.
1436 Changes in version 0.1.1.10-alpha - 2005-12-11
1437 o Correctness bugfixes on 0.1.0.x:
1438 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1439 corrupting the heap, losing FDs, or crashing when we need to resize
1440 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1441 - Stop doing the complex voodoo overkill checking for insecure
1442 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
1443 - When we were closing connections, there was a rare case that
1444 stomped on memory, triggering seg faults and asserts.
1445 - We were neglecting to unlink marked circuits from soon-to-close OR
1446 connections, which caused some rare scribbling on freed memory.
1447 - When we're deciding whether a stream has enough circuits around
1448 that can handle it, count the freshly dirty ones and not the ones
1449 that are so dirty they won't be able to handle it.
1450 - Recover better from TCP connections to Tor servers that are
1451 broken but don't tell you (it happens!); and rotate TLS
1452 connections once a week.
1453 - When we're expiring old circuits, we had a logic error that caused
1454 us to close new rendezvous circuits rather than old ones.
1455 - Fix a scary-looking but apparently harmless bug where circuits
1456 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1457 servers, and never switch to state CIRCUIT_STATE_OPEN.
1458 - When building with -static or on Solaris, we sometimes needed to
1460 - Give a useful message when people run Tor as the wrong user,
1461 rather than telling them to start chowning random directories.
1462 - We were failing to inform the controller about new .onion streams.
1464 o Security bugfixes on 0.1.0.x:
1465 - Refuse server descriptors if the fingerprint line doesn't match
1466 the included identity key. Tor doesn't care, but other apps (and
1467 humans) might actually be trusting the fingerprint line.
1468 - We used to kill the circuit when we receive a relay command we
1469 don't recognize. Now we just drop it.
1470 - Start obeying our firewall options more rigorously:
1471 . If we can't get to a dirserver directly, try going via Tor.
1472 . Don't ever try to connect (as a client) to a place our
1473 firewall options forbid.
1474 . If we specify a proxy and also firewall options, obey the
1475 firewall options even when we're using the proxy: some proxies
1476 can only proxy to certain destinations.
1477 - Fix a bug found by Lasse Overlier: when we were making internal
1478 circuits (intended to be cannibalized later for rendezvous and
1479 introduction circuits), we were picking them so that they had
1480 useful exit nodes. There was no need for this, and it actually
1481 aids some statistical attacks.
1482 - Start treating internal circuits and exit circuits separately.
1483 It's important to keep them separate because internal circuits
1484 have their last hops picked like middle hops, rather than like
1485 exit hops. So exiting on them will break the user's expectations.
1487 o Bugfixes on 0.1.1.x:
1488 - Take out the mis-feature where we tried to detect IP address
1489 flapping for people with DynDNS, and chose not to upload a new
1490 server descriptor sometimes.
1491 - Try to be compatible with OpenSSL 0.9.6 again.
1492 - Log fix: when the controller is logging about .onion addresses,
1493 sometimes it didn't include the ".onion" part of the address.
1494 - Don't try to modify options->DirServers internally -- if the
1495 user didn't specify any, just add the default ones directly to
1496 the trusted dirserver list. This fixes a bug where people running
1497 controllers would use SETCONF on some totally unrelated config
1498 option, and Tor would start yelling at them about changing their
1500 - Let the controller's redirectstream command specify a port, in
1501 case the controller wants to change that too.
1502 - When we requested a pile of server descriptors, we sometimes
1503 accidentally launched a duplicate request for the first one.
1504 - Bugfix for trackhostexits: write down the fingerprint of the
1505 chosen exit, not its nickname, because the chosen exit might not
1507 - When parsing foo.exit, if foo is unknown, and we are leaving
1508 circuits unattached, set the chosen_exit field and leave the
1509 address empty. This matters because controllers got confused
1511 - Directory authorities no longer try to download server
1512 descriptors that they know they will reject.
1514 o Features and updates:
1515 - Replace balanced trees with hash tables: this should make stuff
1516 significantly faster.
1517 - Resume using the AES counter-mode implementation that we ship,
1518 rather than OpenSSL's. Ours is significantly faster.
1519 - Many other CPU and memory improvements.
1520 - Add a new config option FastFirstHopPK (on by default) so clients
1521 do a trivial crypto handshake for their first hop, since TLS has
1522 already taken care of confidentiality and authentication.
1523 - Add a new config option TestSocks so people can see if their
1524 applications are using socks4, socks4a, socks5-with-ip, or
1525 socks5-with-hostname. This way they don't have to keep mucking
1526 with tcpdump and wondering if something got cached somewhere.
1527 - Warn when listening on a public address for socks. I suspect a
1528 lot of people are setting themselves up as open socks proxies,
1529 and they have no idea that jerks on the Internet are using them,
1530 since they simply proxy the traffic into the Tor network.
1531 - Add "private:*" as an alias in configuration for policies. Now
1532 you can simplify your exit policy rather than needing to list
1533 every single internal or nonroutable network space.
1534 - Add a new controller event type that allows controllers to get
1535 all server descriptors that were uploaded to a router in its role
1536 as authoritative dirserver.
1537 - Start shipping socks-extensions.txt, tor-doc-unix.html,
1538 tor-doc-server.html, and stylesheet.css in the tarball.
1539 - Stop shipping tor-doc.html in the tarball.
1542 Changes in version 0.1.1.9-alpha - 2005-11-15
1543 o Usability improvements:
1544 - Start calling it FooListenAddress rather than FooBindAddress,
1545 since few of our users know what it means to bind an address
1547 - Reduce clutter in server logs. We're going to try to make
1548 them actually usable now. New config option ProtocolWarnings that
1549 lets you hear about how _other Tors_ are breaking the protocol. Off
1551 - Divide log messages into logging domains. Once we put some sort
1552 of interface on this, it will let people looking at more verbose
1553 log levels specify the topics they want to hear more about.
1554 - Make directory servers return better http 404 error messages
1555 instead of a generic "Servers unavailable".
1556 - Check for even more Windows version flags when writing the platform
1557 string in server descriptors, and note any we don't recognize.
1558 - Clean up more of the OpenSSL memory when exiting, so we can detect
1559 memory leaks better.
1560 - Make directory authorities be non-versioning, non-naming by
1561 default. Now we can add new directory servers without requiring
1562 their operators to pay close attention.
1563 - When logging via syslog, include the pid whenever we provide
1564 a log entry. Suggested by Todd Fries.
1566 o Performance improvements:
1567 - Directory servers now silently throw away new descriptors that
1568 haven't changed much if the timestamps are similar. We do this to
1569 tolerate older Tor servers that upload a new descriptor every 15
1570 minutes. (It seemed like a good idea at the time.)
1571 - Inline bottleneck smartlist functions; use fast versions by default.
1572 - Add a "Map from digest to void*" abstraction digestmap_t so we
1573 can do less hex encoding/decoding. Use it in router_get_by_digest()
1574 to resolve a performance bottleneck.
1575 - Allow tor_gzip_uncompress to extract as much as possible from
1576 truncated compressed data. Try to extract as many
1577 descriptors as possible from truncated http responses (when
1578 DIR_PURPOSE_FETCH_ROUTERDESC).
1579 - Make circ->onionskin a pointer, not a static array. moria2 was using
1580 125000 circuit_t's after it had been up for a few weeks, which
1581 translates to 20+ megs of wasted space.
1582 - The private half of our EDH handshake keys are now chosen out
1583 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
1585 o Security improvements:
1586 - Start making directory caches retain old routerinfos, so soon
1587 clients can start asking by digest of descriptor rather than by
1588 fingerprint of server.
1589 - Add half our entropy from RAND_poll in OpenSSL. This knows how
1590 to use egd (if present), openbsd weirdness (if present), vms/os2
1591 weirdness (if we ever port there), and more in the future.
1593 o Bugfixes on 0.1.0.x:
1594 - Do round-robin writes of at most 16 kB per write. This might be
1595 more fair on loaded Tor servers, and it might resolve our Windows
1596 crash bug. It might also slow things down.
1597 - Our TLS handshakes were generating a single public/private
1598 keypair for the TLS context, rather than making a new one for
1599 each new connections. Oops. (But we were still rotating them
1600 periodically, so it's not so bad.)
1601 - When we were cannibalizing a circuit with a particular exit
1602 node in mind, we weren't checking to see if that exit node was
1603 already present earlier in the circuit. Oops.
1604 - When a Tor server's IP changes (e.g. from a dyndns address),
1605 upload a new descriptor so clients will learn too.
1606 - Really busy servers were keeping enough circuits open on stable
1607 connections that they were wrapping around the circuit_id
1608 space. (It's only two bytes.) This exposed a bug where we would
1609 feel free to reuse a circuit_id even if it still exists but has
1610 been marked for close. Try to fix this bug. Some bug remains.
1611 - If we would close a stream early (e.g. it asks for a .exit that
1612 we know would refuse it) but the LeaveStreamsUnattached config
1613 option is set by the controller, then don't close it.
1615 o Bugfixes on 0.1.1.8-alpha:
1616 - Fix a big pile of memory leaks, some of them serious.
1617 - Do not try to download a routerdesc if we would immediately reject
1619 - Resume inserting a newline between all router descriptors when
1620 generating (old style) signed directories, since our spec says
1622 - When providing content-type application/octet-stream for
1623 server descriptors using .z, we were leaving out the
1624 content-encoding header. Oops. (Everything tolerated this just
1625 fine, but that doesn't mean we need to be part of the problem.)
1626 - Fix a potential seg fault in getconf and getinfo using version 1
1627 of the controller protocol.
1628 - Avoid crash: do not check whether DirPort is reachable when we
1629 are suppressing it because of hibernation.
1630 - Make --hash-password not crash on exit.
1633 Changes in version 0.1.1.8-alpha - 2005-10-07
1634 o New features (major):
1635 - Clients don't download or use the directory anymore. Now they
1636 download and use network-statuses from the trusted dirservers,
1637 and fetch individual server descriptors as needed from mirrors.
1638 See dir-spec.txt for all the gory details.
1639 - Be more conservative about whether to advertise our DirPort.
1640 The main change is to not advertise if we're running at capacity
1641 and either a) we could hibernate or b) our capacity is low and
1642 we're using a default DirPort.
1643 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
1645 o New features (minor):
1646 - Try to be smart about when to retry network-status and
1647 server-descriptor fetches. Still needs some tuning.
1648 - Stop parsing, storing, or using running-routers output (but
1649 mirrors still cache and serve it).
1650 - Consider a threshold of versioning dirservers (dirservers who have
1651 an opinion about which Tor versions are still recommended) before
1652 deciding whether to warn the user that he's obsolete.
1653 - Dirservers can now reject/invalidate by key and IP, with the
1654 config options "AuthDirInvalid" and "AuthDirReject". This is
1655 useful since currently we automatically list servers as running
1656 and usable even if we know they're jerks.
1657 - Provide dire warnings to any users who set DirServer; move it out
1658 of torrc.sample and into torrc.complete.
1659 - Add MyFamily to torrc.sample in the server section.
1660 - Add nicknames to the DirServer line, so we can refer to them
1661 without requiring all our users to memorize their IP addresses.
1662 - When we get an EOF or a timeout on a directory connection, note
1663 how many bytes of serverdesc we are dropping. This will help
1664 us determine whether it is smart to parse incomplete serverdesc
1666 - Add a new function to "change pseudonyms" -- that is, to stop
1667 using any currently-dirty circuits for new streams, so we don't
1668 link new actions to old actions. Currently it's only called on
1669 HUP (or SIGNAL RELOAD).
1670 - On sighup, if UseHelperNodes changed to 1, use new circuits.
1671 - Start using RAND_bytes rather than RAND_pseudo_bytes from
1672 OpenSSL. Also, reseed our entropy every hour, not just at
1673 startup. And entropy in 512-bit chunks, not 160-bit chunks.
1675 o Fixes on 0.1.1.7-alpha:
1676 - Nobody ever implemented EVENT_ADDRMAP for control protocol
1677 version 0, so don't let version 0 controllers ask for it.
1678 - If you requested something with too many newlines via the
1679 v1 controller protocol, you could crash tor.
1680 - Fix a number of memory leaks, including some pretty serious ones.
1681 - Re-enable DirPort testing again, so Tor servers will be willing
1682 to advertise their DirPort if it's reachable.
1683 - On TLS handshake, only check the other router's nickname against
1684 its expected nickname if is_named is set.
1686 o Fixes forward-ported from 0.1.0.15:
1687 - Don't crash when we don't have any spare file descriptors and we
1688 try to spawn a dns or cpu worker.
1689 - Make the numbers in read-history and write-history into uint64s,
1690 so they don't overflow and publish negatives in the descriptor.
1693 - For the OS X package's modified privoxy config file, comment
1694 out the "logfile" line so we don't log everything passed
1696 - We were whining about using socks4 or socks5-with-local-lookup
1697 even when it's an IP in the "virtual" range we designed exactly
1699 - We were leaking some memory every time the client changes IPs.
1700 - Never call free() on tor_malloc()d memory. This will help us
1701 use dmalloc to detect memory leaks.
1702 - Check for named servers when looking them up by nickname;
1703 warn when we'recalling a non-named server by its nickname;
1704 don't warn twice about the same name.
1705 - Try to list MyFamily elements by key, not by nickname, and warn
1706 if we've not heard of the server.
1707 - Make windows platform detection (uname equivalent) smarter.
1708 - It turns out sparc64 doesn't like unaligned access either.
1711 Changes in version 0.1.0.15 - 2005-09-23
1712 o Bugfixes on 0.1.0.x:
1713 - Reject ports 465 and 587 (spam targets) in default exit policy.
1714 - Don't crash when we don't have any spare file descriptors and we
1715 try to spawn a dns or cpu worker.
1716 - Get rid of IgnoreVersion undocumented config option, and make us
1717 only warn, never exit, when we're running an obsolete version.
1718 - Don't try to print a null string when your server finds itself to
1719 be unreachable and the Address config option is empty.
1720 - Make the numbers in read-history and write-history into uint64s,
1721 so they don't overflow and publish negatives in the descriptor.
1722 - Fix a minor memory leak in smartlist_string_remove().
1723 - We were only allowing ourselves to upload a server descriptor at
1724 most every 20 minutes, even if it changed earlier than that.
1725 - Clean up log entries that pointed to old URLs.
1728 Changes in version 0.1.1.7-alpha - 2005-09-14
1729 o Fixes on 0.1.1.6-alpha:
1730 - Exit servers were crashing when people asked them to make a
1731 connection to an address not in their exit policy.
1732 - Looking up a non-existent stream for a v1 control connection would
1734 - Fix a seg fault if we ask a dirserver for a descriptor by
1735 fingerprint but he doesn't know about him.
1736 - SETCONF was appending items to linelists, not clearing them.
1737 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
1738 out and refuse the setconf if it would fail.
1739 - Downgrade the dirserver log messages when whining about
1743 - Add Peter Palfrader's check-tor script to tor/contrib/
1744 It lets you easily check whether a given server (referenced by
1745 nickname) is reachable by you.
1746 - Numerous changes to move towards client-side v2 directories. Not
1750 - If the user gave tor an odd number of command-line arguments,
1751 we were silently ignoring the last one. Now we complain and fail.
1752 [This wins the oldest-bug prize -- this bug has been present since
1753 November 2002, as released in Tor 0.0.0.]
1754 - Do not use unaligned memory access on alpha, mips, or mipsel.
1755 It *works*, but is very slow, so we treat them as if it doesn't.
1756 - Retry directory requests if we fail to get an answer we like
1757 from a given dirserver (we were retrying before, but only if
1758 we fail to connect).
1759 - When writing the RecommendedVersions line, sort them first.
1760 - When the client asked for a rendezvous port that the hidden
1761 service didn't want to provide, we were sending an IP address
1762 back along with the end cell. Fortunately, it was zero. But stop
1764 - Correct "your server is reachable" log entries to indicate that
1765 it was self-testing that told us so.
1768 Changes in version 0.1.1.6-alpha - 2005-09-09
1769 o Fixes on 0.1.1.5-alpha:
1770 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
1771 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
1772 - Fix bug with tor_memmem finding a match at the end of the string.
1773 - Make unit tests run without segfaulting.
1774 - Resolve some solaris x86 compile warnings.
1775 - Handle duplicate lines in approved-routers files without warning.
1776 - Fix bug where as soon as a server refused any requests due to his
1777 exit policy (e.g. when we ask for localhost and he tells us that's
1778 127.0.0.1 and he won't do it), we decided he wasn't obeying his
1779 exit policy using him for any exits.
1780 - Only do openssl hardware accelerator stuff if openssl version is
1783 o New controller features/fixes:
1784 - Add a "RESETCONF" command so you can set config options like
1785 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
1786 a config option in the torrc with no value, then it clears it
1787 entirely (rather than setting it to its default).
1788 - Add a "GETINFO config-file" to tell us where torrc is.
1789 - Avoid sending blank lines when GETINFO replies should be empty.
1790 - Add a QUIT command for the controller (for using it manually).
1791 - Fix a bug in SAVECONF that was adding default dirservers and
1792 other redundant entries to the torrc file.
1794 o Start on the new directory design:
1795 - Generate, publish, cache, serve new network-status format.
1796 - Publish individual descriptors (by fingerprint, by "all", and by
1798 - Publish client and server recommended versions separately.
1799 - Allow tor_gzip_uncompress() to handle multiple concatenated
1800 compressed strings. Serve compressed groups of router
1801 descriptors. The compression logic here could be more
1803 - Distinguish v1 authorities (all currently trusted directories)
1804 from v2 authorities (all trusted directories).
1805 - Change DirServers config line to note which dirs are v1 authorities.
1806 - Add configuration option "V1AuthoritativeDirectory 1" which
1807 moria1, moria2, and tor26 should set.
1808 - Remove option when getting directory cache to see whether they
1809 support running-routers; they all do now. Replace it with one
1810 to see whether caches support v2 stuff.
1813 - Dirservers now do their own external reachability testing of each
1814 Tor server, and only list them as running if they've been found to
1815 be reachable. We also send back warnings to the server's logs if
1816 it uploads a descriptor that we already believe is unreachable.
1817 - Implement exit enclaves: if we know an IP address for the
1818 destination, and there's a running Tor server at that address
1819 which allows exit to the destination, then extend the circuit to
1820 that exit first. This provides end-to-end encryption and end-to-end
1821 authentication. Also, if the user wants a .exit address or enclave,
1822 use 4 hops rather than 3, and cannibalize a general circ for it
1824 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
1825 controller. Also, rotate dns and cpu workers if the controller
1826 changes options that will affect them; and initialize the dns
1827 worker cache tree whether or not we start out as a server.
1828 - Only upload a new server descriptor when options change, 18
1829 hours have passed, uptime is reset, or bandwidth changes a lot.
1830 - Check [X-]Forwarded-For headers in HTTP requests when generating
1831 log messages. This lets people run dirservers (and caches) behind
1832 Apache but still know which IP addresses are causing warnings.
1834 o Config option changes:
1835 - Replace (Fascist)Firewall* config options with a new
1836 ReachableAddresses option that understands address policies.
1837 For example, "ReachableAddresses *:80,*:443"
1838 - Get rid of IgnoreVersion undocumented config option, and make us
1839 only warn, never exit, when we're running an obsolete version.
1840 - Make MonthlyAccountingStart config option truly obsolete now.
1843 - Reject ports 465 and 587 in the default exit policy, since
1844 people have started using them for spam too.
1845 - It turns out we couldn't bootstrap a network since we added
1846 reachability detection in 0.1.0.1-rc. Good thing the Tor network
1847 has never gone down. Add an AssumeReachable config option to let
1848 servers and dirservers bootstrap. When we're trying to build a
1849 high-uptime or high-bandwidth circuit but there aren't enough
1850 suitable servers, try being less picky rather than simply failing.
1851 - Our logic to decide if the OR we connected to was the right guy
1852 was brittle and maybe open to a mitm for unverified routers.
1853 - We weren't cannibalizing circuits correctly for
1854 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
1855 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
1856 build those from scratch. This should make hidden services faster.
1857 - Predict required circuits better, with an eye toward making hidden
1858 services faster on the service end.
1859 - Retry streams if the exit node sends back a 'misc' failure. This
1860 should result in fewer random failures. Also, after failing
1861 from resolve failed or misc, reset the num failures, so we give
1862 it a fair shake next time we try.
1863 - Clean up the rendezvous warn log msgs, and downgrade some to info.
1864 - Reduce severity on logs about dns worker spawning and culling.
1865 - When we're shutting down and we do something like try to post a
1866 server descriptor or rendezvous descriptor, don't complain that
1867 we seem to be unreachable. Of course we are, we're shutting down.
1868 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
1869 We don't use them yet, but maybe one day our DNS resolver will be
1870 able to discover them.
1871 - Make ContactInfo mandatory for authoritative directory servers.
1872 - Require server descriptors to list IPv4 addresses -- hostnames
1873 are no longer allowed. This also fixes some potential security
1874 problems with people providing hostnames as their address and then
1875 preferentially resolving them to partition users.
1876 - Change log line for unreachability to explicitly suggest /etc/hosts
1877 as the culprit. Also make it clearer what IP address and ports we're
1878 testing for reachability.
1879 - Put quotes around user-supplied strings when logging so users are
1880 more likely to realize if they add bad characters (like quotes)
1882 - Let auth dir servers start without specifying an Address config
1884 - Make unit tests (and other invocations that aren't the real Tor)
1885 run without launching listeners, creating subdirectories, and so on.
1888 Changes in version 0.1.1.5-alpha - 2005-08-08
1889 o Bugfixes included in 0.1.0.14.
1891 o Bugfixes on 0.1.0.x:
1892 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
1893 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
1894 it would silently using ignore the 6668.
1897 Changes in version 0.1.0.14 - 2005-08-08
1898 o Bugfixes on 0.1.0.x:
1899 - Fix the other half of the bug with crypto handshakes
1901 - Fix an assert trigger if you send a 'signal term' via the
1902 controller when it's listening for 'event info' messages.
1905 Changes in version 0.1.1.4-alpha - 2005-08-04
1906 o Bugfixes included in 0.1.0.13.
1909 - Improve tor_gettimeofday() granularity on windows.
1910 - Make clients regenerate their keys when their IP address changes.
1911 - Implement some more GETINFO goodness: expose helper nodes, config
1912 options, getinfo keys.
1915 Changes in version 0.1.0.13 - 2005-08-04
1916 o Bugfixes on 0.1.0.x:
1917 - Fix a critical bug in the security of our crypto handshakes.
1918 - Fix a size_t underflow in smartlist_join_strings2() that made
1919 it do bad things when you hand it an empty smartlist.
1920 - Fix Windows installer to ship Tor license (thanks to Aphex for
1921 pointing out this oversight) and put a link to the doc directory
1923 - Explicitly set no-unaligned-access for sparc: it turns out the
1924 new gcc's let you compile broken code, but that doesn't make it
1928 Changes in version 0.1.1.3-alpha - 2005-07-23
1929 o Bugfixes on 0.1.1.2-alpha:
1930 - Fix a bug in handling the controller's "post descriptor"
1932 - Fix several bugs in handling the controller's "extend circuit"
1934 - Fix a bug in handling the controller's "stream status" event.
1935 - Fix an assert failure if we have a controller listening for
1936 circuit events and we go offline.
1937 - Re-allow hidden service descriptors to publish 0 intro points.
1938 - Fix a crash when generating your hidden service descriptor if
1939 you don't have enough intro points already.
1941 o New features on 0.1.1.2-alpha:
1942 - New controller function "getinfo accounting", to ask how
1943 many bytes we've used in this time period.
1944 - Experimental support for helper nodes: a lot of the risk from
1945 a small static adversary comes because users pick new random
1946 nodes every time they rebuild a circuit. Now users will try to
1947 stick to the same small set of entry nodes if they can. Not
1948 enabled by default yet.
1950 o Bugfixes on 0.1.0.12:
1951 - If you're an auth dir server, always publish your dirport,
1952 even if you haven't yet found yourself to be reachable.
1953 - Fix a size_t underflow in smartlist_join_strings2() that made
1954 it do bad things when you hand it an empty smartlist.
1957 Changes in version 0.1.0.12 - 2005-07-18
1958 o New directory servers:
1959 - tor26 has changed IP address.
1961 o Bugfixes on 0.1.0.x:
1962 - Fix a possible double-free in tor_gzip_uncompress().
1963 - When --disable-threads is set, do not search for or link against
1965 - Don't trigger an assert if an authoritative directory server
1966 claims its dirport is 0.
1967 - Fix bug with removing Tor as an NT service: some people were
1968 getting "The service did not return an error." Thanks to Matt
1972 Changes in version 0.1.1.2-alpha - 2005-07-15
1973 o New directory servers:
1974 - tor26 has changed IP address.
1976 o Bugfixes on 0.1.0.x, crashes/leaks:
1977 - Port the servers-not-obeying-their-exit-policies fix from
1979 - Fix an fd leak in start_daemon().
1980 - On Windows, you can't always reopen a port right after you've
1981 closed it. So change retry_listeners() to only close and re-open
1982 ports that have changed.
1983 - Fix a possible double-free in tor_gzip_uncompress().
1985 o Bugfixes on 0.1.0.x, usability:
1986 - When tor_socketpair() fails in Windows, give a reasonable
1987 Windows-style errno back.
1988 - Let people type "tor --install" as well as "tor -install" when
1990 want to make it an NT service.
1991 - NT service patch from Matt Edman to improve error messages.
1992 - When the controller asks for a config option with an abbreviated
1993 name, give the full name in our response.
1994 - Correct the man page entry on TrackHostExitsExpire.
1995 - Looks like we were never delivering deflated (i.e. compressed)
1996 running-routers lists, even when asked. Oops.
1997 - When --disable-threads is set, do not search for or link against
2000 o Bugfixes on 0.1.1.x:
2001 - Fix a seg fault with autodetecting which controller version is
2005 - New hidden service descriptor format: put a version in it, and
2006 let people specify introduction/rendezvous points that aren't
2007 in "the directory" (which is subjective anyway).
2008 - Allow the DEBUG controller event to work again. Mark certain log
2009 entries as "don't tell this to controllers", so we avoid cycles.
2012 Changes in version 0.1.0.11 - 2005-06-30
2013 o Bugfixes on 0.1.0.x:
2014 - Fix major security bug: servers were disregarding their
2015 exit policies if clients behaved unexpectedly.
2016 - Make OS X init script check for missing argument, so we don't
2017 confuse users who invoke it incorrectly.
2018 - Fix a seg fault in "tor --hash-password foo".
2019 - The MAPADDRESS control command was broken.
2022 Changes in version 0.1.1.1-alpha - 2005-06-29
2024 - Make OS X init script check for missing argument, so we don't
2025 confuse users who invoke it incorrectly.
2026 - Fix a seg fault in "tor --hash-password foo".
2027 - Fix a possible way to DoS dirservers.
2028 - When we complain that your exit policy implicitly allows local or
2029 private address spaces, name them explicitly so operators can
2031 - Make the log message less scary when all the dirservers are
2032 temporarily unreachable.
2033 - We were printing the number of idle dns workers incorrectly when
2037 - Revised controller protocol (version 1) that uses ascii rather
2038 than binary. Add supporting libraries in python and java so you
2039 can use the controller from your applications without caring how
2041 - Spiffy new support for crypto hardware accelerators. Can somebody
2045 Changes in version 0.0.9.10 - 2005-06-16
2046 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
2047 - Refuse relay cells that claim to have a length larger than the
2048 maximum allowed. This prevents a potential attack that could read
2049 arbitrary memory (e.g. keys) from an exit server's process
2053 Changes in version 0.1.0.10 - 2005-06-14
2054 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
2055 libevent before 1.1a.
2058 Changes in version 0.1.0.9-rc - 2005-06-09
2060 - Reset buf->highwater every time buf_shrink() is called, not just on
2061 a successful shrink. This was causing significant memory bloat.
2062 - Fix buffer overflow when checking hashed passwords.
2063 - Security fix: if seeding the RNG on Win32 fails, quit.
2064 - Allow seeding the RNG on Win32 even when you're not running as
2066 - Disable threading on Solaris too. Something is wonky with it,
2067 cpuworkers, and reentrant libs.
2068 - Reenable the part of the code that tries to flush as soon as an
2069 OR outbuf has a full TLS record available. Perhaps this will make
2070 OR outbufs not grow as huge except in rare cases, thus saving lots
2071 of CPU time plus memory.
2072 - Reject malformed .onion addresses rather then passing them on as
2073 normal web requests.
2074 - Adapt patch from Adam Langley: fix possible memory leak in
2075 tor_lookup_hostname().
2076 - Initialize libevent later in the startup process, so the logs are
2077 already established by the time we start logging libevent warns.
2078 - Use correct errno on win32 if libevent fails.
2079 - Check and warn about known-bad/slow libevent versions.
2080 - Pay more attention to the ClientOnly config option.
2081 - Have torctl.in/tor.sh.in check for location of su binary (needed
2083 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
2084 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
2085 HttpProxyAuthenticator
2086 - Stop warning about sigpipes in the logs. We're going to
2087 pretend that getting these occassionally is normal and fine.
2088 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
2090 installer screens; and don't put stuff into StartupItems unless
2091 the user asks you to.
2092 - Require servers that use the default dirservers to have public IP
2093 addresses. We have too many servers that are configured with private
2094 IPs and their admins never notice the log entries complaining that
2095 their descriptors are being rejected.
2096 - Add OSX uninstall instructions. An actual uninstall script will
2100 Changes in version 0.1.0.8-rc - 2005-05-23
2102 - It turns out that kqueue on OS X 10.3.9 was causing kernel
2103 panics. Disable kqueue on all OS X Tors.
2104 - Fix RPM: remove duplicate line accidentally added to the rpm
2106 - Disable threads on openbsd too, since its gethostaddr is not
2108 - Tolerate libevent 0.8 since it still works, even though it's
2110 - Enable building on Red Hat 9.0 again.
2111 - Allow the middle hop of the testing circuit to be running any
2112 version, now that most of them have the bugfix to let them connect
2113 to unknown servers. This will allow reachability testing to work
2114 even when 0.0.9.7-0.0.9.9 become obsolete.
2115 - Handle relay cells with rh.length too large. This prevents
2116 a potential attack that could read arbitrary memory (maybe even
2117 keys) from the exit server's process.
2118 - We screwed up the dirport reachability testing when we don't yet
2119 have a cached version of the directory. Hopefully now fixed.
2120 - Clean up router_load_single_router() (used by the controller),
2121 so it doesn't seg fault on error.
2122 - Fix a minor memory leak when somebody establishes an introduction
2123 point at your Tor server.
2124 - If a socks connection ends because read fails, don't warn that
2125 you're not sending a socks reply back.
2128 - Add HttpProxyAuthenticator config option too, that works like
2129 the HttpsProxyAuthenticator config option.
2130 - Encode hashed controller passwords in hex instead of base64,
2131 to make it easier to write controllers.
2134 Changes in version 0.1.0.7-rc - 2005-05-17
2136 - Fix a bug in the OS X package installer that prevented it from
2137 installing on Tiger.
2138 - Fix a script bug in the OS X package installer that made it
2139 complain during installation.
2140 - Find libevent even if it's hiding in /usr/local/ and your
2141 CFLAGS and LDFLAGS don't tell you to look there.
2142 - Be able to link with libevent as a shared library (the default
2143 after 1.0d), even if it's hiding in /usr/local/lib and even
2144 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
2145 assuming you're running gcc. Otherwise fail and give a useful
2147 - Fix a bug in the RPM packager: set home directory for _tor to
2148 something more reasonable when first installing.
2149 - Free a minor amount of memory that is still reachable on exit.
2152 Changes in version 0.1.0.6-rc - 2005-05-14
2154 - Implement --disable-threads configure option. Disable threads on
2155 netbsd by default, because it appears to have no reentrant resolver
2157 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
2158 release (1.1) detects and disables kqueue if it's broken.
2159 - Append default exit policy before checking for implicit internal
2160 addresses. Now we don't log a bunch of complaints on startup
2161 when using the default exit policy.
2162 - Some people were putting "Address " in their torrc, and they had
2163 a buggy resolver that resolved " " to 0.0.0.0. Oops.
2164 - If DataDir is ~/.tor, and that expands to /.tor, then default to
2165 LOCALSTATEDIR/tor instead.
2166 - Fix fragmented-message bug in TorControl.py.
2167 - Resolve a minor bug which would prevent unreachable dirports
2168 from getting suppressed in the published descriptor.
2169 - When the controller gave us a new descriptor, we weren't resolving
2170 it immediately, so Tor would think its address was 0.0.0.0 until
2171 we fetched a new directory.
2172 - Fix an uppercase/lowercase case error in suppressing a bogus
2173 libevent warning on some Linuxes.
2176 - Begin scrubbing sensitive strings from logs by default. Turn off
2177 the config option SafeLogging if you need to do debugging.
2178 - Switch to a new buffer management algorithm, which tries to avoid
2179 reallocing and copying quite as much. In first tests it looks like
2180 it uses *more* memory on average, but less cpu.
2181 - First cut at support for "create-fast" cells. Clients can use
2182 these when extending to their first hop, since the TLS already
2183 provides forward secrecy and authentication. Not enabled on
2185 - When dirservers refuse a router descriptor, we now log its
2186 contactinfo, platform, and the poster's IP address.
2187 - Call tor_free_all instead of connections_free_all after forking, to
2188 save memory on systems that need to fork.
2189 - Whine at you if you're a server and you don't set your contactinfo.
2190 - Implement --verify-config command-line option to check if your torrc
2191 is valid without actually launching Tor.
2192 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
2193 rather than just rejecting it.
2196 Changes in version 0.1.0.5-rc - 2005-04-27
2198 - Stop trying to print a null pointer if an OR conn fails because
2199 we didn't like its cert.
2201 - Switch our internal buffers implementation to use a ring buffer,
2202 to hopefully improve performance for fast servers a lot.
2203 - Add HttpsProxyAuthenticator support (basic auth only), based
2204 on patch from Adam Langley.
2205 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
2206 the fast servers that have been joining lately.
2207 - Give hidden service accesses extra time on the first attempt,
2208 since 60 seconds is often only barely enough. This might improve
2210 - Improve performance for dirservers: stop re-parsing the whole
2211 directory every time you regenerate it.
2212 - Add more debugging info to help us find the weird dns freebsd
2213 pthreads bug; cleaner debug messages to help track future issues.
2216 Changes in version 0.0.9.9 - 2005-04-23
2217 o Bugfixes on 0.0.9.x:
2218 - If unofficial Tor clients connect and send weird TLS certs, our
2219 Tor server triggers an assert. This release contains a minimal
2220 backport from the broader fix that we put into 0.1.0.4-rc.
2223 Changes in version 0.1.0.4-rc - 2005-04-23
2225 - If unofficial Tor clients connect and send weird TLS certs, our
2226 Tor server triggers an assert. Stop asserting, and start handling
2227 TLS errors better in other situations too.
2228 - When the controller asks us to tell it about all the debug-level
2229 logs, it turns out we were generating debug-level logs while
2230 telling it about them, which turns into a bad loop. Now keep
2231 track of whether you're sending a debug log to the controller,
2232 and don't log when you are.
2233 - Fix the "postdescriptor" feature of the controller interface: on
2234 non-complete success, only say "done" once.
2236 - Clients are now willing to load balance over up to 2mB, not 1mB,
2237 of advertised bandwidth capacity.
2238 - Add a NoPublish config option, so you can be a server (e.g. for
2239 testing running Tor servers in other Tor networks) without
2240 publishing your descriptor to the primary dirservers.
2243 Changes in version 0.1.0.3-rc - 2005-04-08
2244 o Improvements on 0.1.0.2-rc:
2245 - Client now retries when streams end early for 'hibernating' or
2246 'resource limit' reasons, rather than failing them.
2247 - More automated handling for dirserver operators:
2248 - Automatically approve nodes running 0.1.0.2-rc or later,
2249 now that the the reachability detection stuff is working.
2250 - Now we allow two unverified servers with the same nickname
2251 but different keys. But if a nickname is verified, only that
2252 nickname+key are allowed.
2253 - If you're an authdirserver connecting to an address:port,
2254 and it's not the OR you were expecting, forget about that
2255 descriptor. If he *was* the one you were expecting, then forget
2256 about all other descriptors for that address:port.
2257 - Allow servers to publish descriptors from 12 hours in the future.
2258 Corollary: only whine about clock skew from the dirserver if
2259 he's a trusted dirserver (since now even verified servers could
2260 have quite wrong clocks).
2261 - Adjust maximum skew and age for rendezvous descriptors: let skew
2262 be 48 hours rather than 90 minutes.
2263 - Efficiency improvements:
2264 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
2265 it much faster to look up a circuit for each relay cell.
2266 - Remove most calls to assert_all_pending_dns_resolves_ok(),
2267 since they're eating our cpu on exit nodes.
2268 - Stop wasting time doing a case insensitive comparison for every
2269 dns name every time we do any lookup. Canonicalize the names to
2270 lowercase and be done with it.
2271 - Start sending 'truncated' cells back rather than destroy cells,
2272 if the circuit closes in front of you. This means we won't have
2273 to abandon partially built circuits.
2274 - Only warn once per nickname from add_nickname_list_to_smartlist
2275 per failure, so an entrynode or exitnode choice that's down won't
2277 - Put a note in the torrc about abuse potential with the default
2279 - Revise control spec and implementation to allow all log messages to
2280 be sent to controller with their severities intact (suggested by
2281 Matt Edman). Update TorControl to handle new log event types.
2282 - Provide better explanation messages when controller's POSTDESCRIPTOR
2284 - Stop putting nodename in the Platform string in server descriptors.
2285 It doesn't actually help, and it is confusing/upsetting some people.
2287 o Bugfixes on 0.1.0.2-rc:
2288 - We were printing the host mask wrong in exit policies in server
2289 descriptors. This isn't a critical bug though, since we were still
2290 obeying the exit policy internally.
2291 - Fix Tor when compiled with libevent but without pthreads: move
2292 connection_unregister() from _connection_free() to
2294 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
2295 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
2296 when we look through the connection array, we'll find any of the
2297 cpu/dnsworkers. This is no good.
2299 o Bugfixes on 0.0.9.8:
2300 - Fix possible bug on threading platforms (e.g. win32) which was
2301 leaking a file descriptor whenever a cpuworker or dnsworker died.
2302 - When using preferred entry or exit nodes, ignore whether the
2303 circuit wants uptime or capacity. They asked for the nodes, they
2305 - chdir() to your datadirectory at the *end* of the daemonize process,
2306 not the beginning. This was a problem because the first time you
2307 run tor, if your datadir isn't there, and you have runasdaemon set
2308 to 1, it will try to chdir to it before it tries to create it. Oops.
2309 - Handle changed router status correctly when dirserver reloads
2310 fingerprint file. We used to be dropping all unverified descriptors
2311 right then. The bug was hidden because we would immediately
2312 fetch a directory from another dirserver, which would include the
2313 descriptors we just dropped.
2314 - When we're connecting to an OR and he's got a different nickname/key
2315 than we were expecting, only complain loudly if we're an OP or a
2316 dirserver. Complaining loudly to the OR admins just confuses them.
2317 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
2318 artificially capped at 500kB.
2321 Changes in version 0.0.9.8 - 2005-04-07
2322 o Bugfixes on 0.0.9.x:
2323 - We have a bug that I haven't found yet. Sometimes, very rarely,
2324 cpuworkers get stuck in the 'busy' state, even though the cpuworker
2325 thinks of itself as idle. This meant that no new circuits ever got
2326 established. Here's a workaround to kill any cpuworker that's been
2327 busy for more than 100 seconds.
2330 Changes in version 0.1.0.2-rc - 2005-04-01
2331 o Bugfixes on 0.1.0.1-rc:
2332 - Fixes on reachability detection:
2333 - Don't check for reachability while hibernating.
2334 - If ORPort is reachable but DirPort isn't, still publish the
2335 descriptor, but zero out DirPort until it's found reachable.
2336 - When building testing circs for ORPort testing, use only
2337 high-bandwidth nodes, so fewer circuits fail.
2338 - Complain about unreachable ORPort separately from unreachable
2339 DirPort, so the user knows what's going on.
2340 - Make sure we only conclude ORPort reachability if we didn't
2341 initiate the conn. Otherwise we could falsely conclude that
2342 we're reachable just because we connected to the guy earlier
2343 and he used that same pipe to extend to us.
2344 - Authdirservers shouldn't do ORPort reachability detection,
2345 since they're in clique mode, so it will be rare to find a
2346 server not already connected to them.
2347 - When building testing circuits, always pick middle hops running
2348 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
2349 bug. (This is a kludge; it will go away when 0.0.9.x becomes
2351 - When we decide we're reachable, actually publish our descriptor
2353 - Fix bug in redirectstream in the controller.
2354 - Fix the state descriptor strings so logs don't claim edge streams
2355 are in a different state than they actually are.
2356 - Use recent libevent features when possible (this only really affects
2357 win32 and osx right now, because the new libevent with these
2358 features hasn't been released yet). Add code to suppress spurious
2360 - Prevent possible segfault in connection_close_unattached_ap().
2361 - Fix newlines on torrc in win32.
2362 - Improve error msgs when tor-resolve fails.
2364 o Improvements on 0.0.9.x:
2365 - New experimental script tor/contrib/ExerciseServer.py (needs more
2366 work) that uses the controller interface to build circuits and
2367 fetch pages over them. This will help us bootstrap servers that
2368 have lots of capacity but haven't noticed it yet.
2369 - New experimental script tor/contrib/PathDemo.py (needs more work)
2370 that uses the controller interface to let you choose whole paths
2372 "<hostname>.<path,separated by dots>.<length of path>.path"
2373 - When we've connected to an OR and handshaked but didn't like
2374 the result, we were closing the conn without sending destroy
2375 cells back for pending circuits. Now send those destroys.
2378 Changes in version 0.0.9.7 - 2005-04-01
2379 o Bugfixes on 0.0.9.x:
2380 - Fix another race crash bug (thanks to Glenn Fink for reporting).
2381 - Compare identity to identity, not to nickname, when extending to
2382 a router not already in the directory. This was preventing us from
2383 extending to unknown routers. Oops.
2384 - Make sure to create OS X Tor user in <500 range, so we aren't
2385 creating actual system users.
2386 - Note where connection-that-hasn't-sent-end was marked, and fix
2387 a few really loud instances of this harmless bug (it's fixed more
2391 Changes in version 0.1.0.1-rc - 2005-03-28
2393 - Add reachability testing. Your Tor server will automatically try
2394 to see if its ORPort and DirPort are reachable from the outside,
2395 and it won't upload its descriptor until it decides they are.
2396 - Handle unavailable hidden services better. Handle slow or busy
2397 hidden services better.
2398 - Add support for CONNECTing through https proxies, with "HttpsProxy"
2400 - New exit policy: accept most low-numbered ports, rather than
2401 rejecting most low-numbered ports.
2402 - More Tor controller support (still experimental). See
2403 http://tor.eff.org/doc/control-spec.txt for all the new features,
2404 including signals to emulate unix signals from any platform;
2405 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
2406 closestream; closecircuit; etc.
2407 - Make nt services work and start on startup on win32 (based on
2408 patch by Matt Edman).
2409 - Add a new AddressMap config directive to rewrite incoming socks
2410 addresses. This lets you, for example, declare an implicit
2411 required exit node for certain sites.
2412 - Add a new TrackHostExits config directive to trigger addressmaps
2413 for certain incoming socks addresses -- for sites that break when
2414 your exit keeps changing (based on patch by Mike Perry).
2415 - Redo the client-side dns cache so it's just an addressmap too.
2416 - Notice when our IP changes, and reset stats/uptime/reachability.
2417 - When an application is using socks5, give him the whole variety of
2418 potential socks5 responses (connect refused, host unreachable, etc),
2419 rather than just "success" or "failure".
2420 - A more sane version numbering system. See
2421 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
2422 - New contributed script "exitlist": a simple python script to
2423 parse directories and find Tor nodes that exit to listed
2425 - New contributed script "privoxy-tor-toggle" to toggle whether
2426 Privoxy uses Tor. Seems to be configured for Debian by default.
2427 - Report HTTP reasons to client when getting a response from directory
2428 servers -- so you can actually know what went wrong.
2429 - New config option MaxAdvertisedBandwidth which lets you advertise
2430 a low bandwidthrate (to not attract as many circuits) while still
2431 allowing a higher bandwidthrate in reality.
2433 o Robustness/stability fixes:
2434 - Make Tor use Niels Provos's libevent instead of its current
2435 poll-but-sometimes-select mess. This will let us use faster async
2436 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
2438 - pthread support now too. This was forced because when we forked,
2439 we ended up wasting a lot of duplicate ram over time. Also switch
2440 to foo_r versions of some library calls to allow reentry and
2442 - Better handling for heterogeneous / unreliable nodes:
2443 - Annotate circuits w/ whether they aim to contain high uptime nodes
2444 and/or high capacity nodes. When building circuits, choose
2446 - This means that every single node in an intro rend circuit,
2447 not just the last one, will have a minimum uptime.
2448 - New config option LongLivedPorts to indicate application streams
2449 that will want high uptime circuits.
2450 - Servers reset uptime when a dir fetch entirely fails. This
2451 hopefully reflects stability of the server's network connectivity.
2452 - If somebody starts his tor server in Jan 2004 and then fixes his
2453 clock, don't make his published uptime be a year.
2454 - Reset published uptime when you wake up from hibernation.
2455 - Introduce a notion of 'internal' circs, which are chosen without
2456 regard to the exit policy of the last hop. Intro and rendezvous
2457 circs must be internal circs, to avoid leaking information. Resolve
2458 and connect streams can use internal circs if they want.
2459 - New circuit pooling algorithm: make sure to have enough circs around
2460 to satisfy any predicted ports, and also make sure to have 2 internal
2461 circs around if we've required internal circs lately (and with high
2462 uptime if we've seen that lately too).
2463 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
2464 which describes how often we retry making new circuits if current
2465 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
2466 how long we're willing to make use of an already-dirty circuit.
2467 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
2468 circ as necessary, if there are any completed ones lying around
2469 when we try to launch one.
2470 - Make hidden services try to establish a rendezvous for 30 seconds,
2471 rather than for n (where n=3) attempts to build a circuit.
2472 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
2473 "ShutdownWaitLength".
2474 - Try to be more zealous about calling connection_edge_end when
2475 things go bad with edge conns in connection.c.
2476 - Revise tor-spec to add more/better stream end reasons.
2477 - Revise all calls to connection_edge_end to avoid sending "misc",
2478 and to take errno into account where possible.
2481 - Fix a race condition that can trigger an assert, when we have a
2482 pending create cell and an OR connection fails right then.
2483 - Fix several double-mark-for-close bugs, e.g. where we were finding
2484 a conn for a cell even if that conn is already marked for close.
2485 - Make sequence of log messages when starting on win32 with no config
2486 file more reasonable.
2487 - When choosing an exit node for a new non-internal circ, don't take
2488 into account whether it'll be useful for any pending x.onion
2489 addresses -- it won't.
2490 - Turn addr_policy_compare from a tristate to a quadstate; this should
2491 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
2492 for google.com" problem.
2493 - Make "platform" string in descriptor more accurate for Win32 servers,
2494 so it's not just "unknown platform".
2495 - Fix an edge case in parsing config options (thanks weasel).
2496 If they say "--" on the commandline, it's not an option.
2497 - Reject odd-looking addresses at the client (e.g. addresses that
2498 contain a colon), rather than having the server drop them because
2500 - tor-resolve requests were ignoring .exit if there was a working circuit
2501 they could use instead.
2502 - REUSEADDR on normal platforms means you can rebind to the port
2503 right after somebody else has let it go. But REUSEADDR on win32
2504 means to let you bind to the port _even when somebody else
2505 already has it bound_! So, don't do that on Win32.
2506 - Change version parsing logic: a version is "obsolete" if it is not
2507 recommended and (1) there is a newer recommended version in the
2508 same series, or (2) there are no recommended versions in the same
2509 series, but there are some recommended versions in a newer series.
2510 A version is "new" if it is newer than any recommended version in
2512 - Stop most cases of hanging up on a socks connection without sending
2516 - Require BandwidthRate to be at least 20kB/s for servers.
2517 - When a dirserver causes you to give a warn, mention which dirserver
2519 - New config option DirAllowPrivateAddresses for authdirservers.
2520 Now by default they refuse router descriptors that have non-IP or
2521 private-IP addresses.
2522 - Stop publishing socksport in the directory, since it's not
2523 actually meant to be public. For compatibility, publish a 0 there
2525 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
2526 smart" value, that is low for servers and high for clients.
2527 - If our clock jumps forward by 100 seconds or more, assume something
2528 has gone wrong with our network and abandon all not-yet-used circs.
2529 - Warn when exit policy implicitly allows local addresses.
2530 - If we get an incredibly skewed timestamp from a dirserver mirror
2531 that isn't a verified OR, don't warn -- it's probably him that's
2533 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
2534 cookies to disk and doesn't log each web request to disk. (Thanks
2535 to Brett Carrington for pointing this out.)
2536 - When a client asks us for a dir mirror and we don't have one,
2537 launch an attempt to get a fresh one.
2538 - If we're hibernating and we get a SIGINT, exit immediately.
2539 - Add --with-dmalloc ./configure option, to track memory leaks.
2540 - And try to free all memory on closing, so we can detect what
2542 - Cache local dns resolves correctly even when they're .exit
2544 - Give a better warning when some other server advertises an
2545 ORPort that is actually an apache running ssl.
2546 - Add "opt hibernating 1" to server descriptor to make it clearer
2547 whether the server is hibernating.
2550 Changes in version 0.0.9.6 - 2005-03-24
2551 o Bugfixes on 0.0.9.x (crashes and asserts):
2552 - Add new end stream reasons to maintainance branch. Fix bug where
2553 reason (8) could trigger an assert. Prevent bug from recurring.
2554 - Apparently win32 stat wants paths to not end with a slash.
2555 - Fix assert triggers in assert_cpath_layer_ok(), where we were
2556 blowing away the circuit that conn->cpath_layer points to, then
2557 checking to see if the circ is well-formed. Backport check to make
2558 sure we dont use the cpath on a closed connection.
2559 - Prevent circuit_resume_edge_reading_helper() from trying to package
2560 inbufs for marked-for-close streams.
2561 - Don't crash on hup if your options->address has become unresolvable.
2562 - Some systems (like OS X) sometimes accept() a connection and tell
2563 you the remote host is 0.0.0.0:0. If this happens, due to some
2564 other mis-features, we get confused; so refuse the conn for now.
2566 o Bugfixes on 0.0.9.x (other):
2567 - Fix harmless but scary "Unrecognized content encoding" warn message.
2568 - Add new stream error reason: TORPROTOCOL reason means "you are not
2569 speaking a version of Tor I understand; say bye-bye to your stream."
2570 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
2571 into the future, now that we are more tolerant of skew. This
2572 resolves a bug where a Tor server would refuse to cache a directory
2573 because all the directories it gets are too far in the future;
2574 yet the Tor server never logs any complaints about clock skew.
2575 - Mac packaging magic: make man pages useable, and do not overwrite
2576 existing torrc files.
2577 - Make OS X log happily to /var/log/tor/tor.log
2580 Changes in version 0.0.9.5 - 2005-02-22
2581 o Bugfixes on 0.0.9.x:
2582 - Fix an assert race at exit nodes when resolve requests fail.
2583 - Stop picking unverified dir mirrors--it only leads to misery.
2584 - Patch from Matt Edman to make NT services work better. Service
2585 support is still not compiled into the executable by default.
2586 - Patch from Dmitri Bely so the Tor service runs better under
2587 the win32 SYSTEM account.
2588 - Make tor-resolve actually work (?) on Win32.
2589 - Fix a sign bug when getrlimit claims to have 4+ billion
2590 file descriptors available.
2591 - Stop refusing to start when bandwidthburst == bandwidthrate.
2592 - When create cells have been on the onion queue more than five
2593 seconds, just send back a destroy and take them off the list.
2596 Changes in version 0.0.9.4 - 2005-02-03
2597 o Bugfixes on 0.0.9:
2598 - Fix an assert bug that took down most of our servers: when
2599 a server claims to have 1 GB of bandwidthburst, don't
2601 - Don't crash as badly if we have spawned the max allowed number
2602 of dnsworkers, or we're out of file descriptors.
2603 - Block more file-sharing ports in the default exit policy.
2604 - MaxConn is now automatically set to the hard limit of max
2605 file descriptors we're allowed (ulimit -n), minus a few for
2607 - Give a clearer message when servers need to raise their
2608 ulimit -n when they start running out of file descriptors.
2609 - SGI Compatibility patches from Jan Schaumann.
2610 - Tolerate a corrupt cached directory better.
2611 - When a dirserver hasn't approved your server, list which one.
2612 - Go into soft hibernation after 95% of the bandwidth is used,
2613 not 99%. This is especially important for daily hibernators who
2614 have a small accounting max. Hopefully it will result in fewer
2615 cut connections when the hard hibernation starts.
2616 - Load-balance better when using servers that claim more than
2617 800kB/s of capacity.
2618 - Make NT services work (experimental, only used if compiled in).
2621 Changes in version 0.0.9.3 - 2005-01-21
2622 o Bugfixes on 0.0.9:
2623 - Backport the cpu use fixes from main branch, so busy servers won't
2624 need as much processor time.
2625 - Work better when we go offline and then come back, or when we
2626 run Tor at boot before the network is up. We do this by
2627 optimistically trying to fetch a new directory whenever an
2628 application request comes in and we think we're offline -- the
2629 human is hopefully a good measure of when the network is back.
2630 - Backport some minimal hidserv bugfixes: keep rend circuits open as
2631 long as you keep using them; actually publish hidserv descriptors
2632 shortly after they change, rather than waiting 20-40 minutes.
2633 - Enable Mac startup script by default.
2634 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
2635 - When you update AllowUnverifiedNodes or FirewallPorts via the
2636 controller's setconf feature, we were always appending, never
2638 - When you update HiddenServiceDir via setconf, it was screwing up
2639 the order of reading the lines, making it fail.
2640 - Do not rewrite a cached directory back to the cache; otherwise we
2641 will think it is recent and not fetch a newer one on startup.
2642 - Workaround for webservers that lie about Content-Encoding: Tor
2643 now tries to autodetect compressed directories and compression
2644 itself. This lets us Proxypass dir fetches through apache.
2647 Changes in version 0.0.9.2 - 2005-01-04
2648 o Bugfixes on 0.0.9 (crashes and asserts):
2649 - Fix an assert on startup when the disk is full and you're logging
2651 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
2652 style address, then we'd crash.
2653 - Fix an assert trigger when the running-routers string we get from
2654 a dirserver is broken.
2655 - Make worker threads start and run on win32. Now win32 servers
2657 - Bandaid (not actually fix, but now it doesn't crash) an assert
2658 where the dns worker dies mysteriously and the main Tor process
2659 doesn't remember anything about the address it was resolving.
2661 o Bugfixes on 0.0.9 (Win32):
2662 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
2663 name out of the warning/assert messages.
2664 - Fix a superficial "unhandled error on read" bug on win32.
2665 - The win32 installer no longer requires a click-through for our
2666 license, since our Free Software license grants rights but does not
2668 - Win32: When connecting to a dirserver fails, try another one
2669 immediately. (This was already working for non-win32 Tors.)
2670 - Stop trying to parse $HOME on win32 when hunting for default
2672 - Make tor-resolve.c work on win32 by calling network_init().
2674 o Bugfixes on 0.0.9 (other):
2675 - Make 0.0.9.x build on Solaris again.
2676 - Due to a fencepost error, we were blowing away the \n when reporting
2677 confvalue items in the controller. So asking for multiple config
2678 values at once couldn't work.
2679 - When listing circuits that are pending on an opening OR connection,
2680 if we're an OR we were listing circuits that *end* at us as
2681 being pending on every listener, dns/cpu worker, etc. Stop that.
2682 - Dirservers were failing to create 'running-routers' or 'directory'
2683 strings if we had more than some threshold of routers. Fix them so
2684 they can handle any number of routers.
2685 - Fix a superficial "Duplicate mark for close" bug.
2686 - Stop checking for clock skew for OR connections, even for servers.
2687 - Fix a fencepost error that was chopping off the last letter of any
2688 nickname that is the maximum allowed nickname length.
2689 - Update URLs in log messages so they point to the new website.
2690 - Fix a potential problem in mangling server private keys while
2691 writing to disk (not triggered yet, as far as we know).
2692 - Include the licenses for other free software we include in Tor,
2693 now that we're shipping binary distributions more regularly.
2696 Changes in version 0.0.9.1 - 2004-12-15
2697 o Bugfixes on 0.0.9:
2698 - Make hibernation actually work.
2699 - Make HashedControlPassword config option work.
2700 - When we're reporting event circuit status to a controller,
2701 don't use the stream status code.
2704 Changes in version 0.0.9 - 2004-12-12
2706 - Clean up manpage and torrc.sample file.
2707 - Clean up severities and text of log warnings.
2709 - Make servers trigger an assert when they enter hibernation.
2712 Changes in version 0.0.9rc7 - 2004-12-08
2713 o Bugfixes on 0.0.9rc:
2714 - Fix a stack-trashing crash when an exit node begins hibernating.
2715 - Avoid looking at unallocated memory while considering which
2716 ports we need to build circuits to cover.
2717 - Stop a sigpipe: when an 'end' cell races with eof from the app,
2718 we shouldn't hold-open-until-flush if the eof arrived first.
2719 - Fix a bug with init_cookie_authentication() in the controller.
2720 - When recommending new-format log lines, if the upper bound is
2721 LOG_ERR, leave it implicit.
2723 o Bugfixes on 0.0.8.1:
2724 - Fix a whole slew of memory leaks.
2725 - Fix isspace() and friends so they still make Solaris happy
2726 but also so they don't trigger asserts on win32.
2727 - Fix parse_iso_time on platforms without strptime (eg win32).
2728 - win32: tolerate extra "readable" events better.
2729 - win32: when being multithreaded, leave parent fdarray open.
2730 - Make unit tests work on win32.
2733 Changes in version 0.0.9rc6 - 2004-12-06
2734 o Bugfixes on 0.0.9pre:
2735 - Clean up some more integer underflow opportunities (not exploitable
2737 - While hibernating, hup should not regrow our listeners.
2738 - Send an end to the streams we close when we hibernate, rather
2739 than just chopping them off.
2740 - React to eof immediately on non-open edge connections.
2742 o Bugfixes on 0.0.8.1:
2743 - Calculate timeout for waiting for a connected cell from the time
2744 we sent the begin cell, not from the time the stream started. If
2745 it took a long time to establish the circuit, we would time out
2746 right after sending the begin cell.
2747 - Fix router_compare_addr_to_addr_policy: it was not treating a port
2748 of * as always matching, so we were picking reject *:* nodes as
2749 exit nodes too. Oops.
2752 - New circuit building strategy: keep a list of ports that we've
2753 used in the past 6 hours, and always try to have 2 circuits open
2754 or on the way that will handle each such port. Seed us with port
2755 80 so web users won't complain that Tor is "slow to start up".
2756 - Make kill -USR1 dump more useful stats about circuits.
2757 - When warning about retrying or giving up, print the address, so
2758 the user knows which one it's talking about.
2759 - If you haven't used a clean circuit in an hour, throw it away,
2760 just to be on the safe side. (This means after 6 hours a totally
2761 unused Tor client will have no circuits open.)
2764 Changes in version 0.0.9rc5 - 2004-12-01
2765 o Bugfixes on 0.0.8.1:
2766 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
2767 - Let resolve conns retry/expire also, rather than sticking around
2769 - If we are using select, make sure we stay within FD_SETSIZE.
2771 o Bugfixes on 0.0.9pre:
2772 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
2773 but doesn't seem to be currently; thanks to Ilja van Sprundel for
2775 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
2776 instead. Impose minima and maxima for all *Period options; impose
2777 even tighter maxima for fetching if we are a caching dirserver.
2778 Clip rather than rejecting.
2779 - Fetch cached running-routers from servers that serve it (that is,
2780 authdirservers and servers running 0.0.9rc5-cvs or later.)
2783 - Accept *:706 (silc) in default exit policy.
2784 - Implement new versioning format for post 0.1.
2785 - Support "foo.nickname.exit" addresses, to let Alice request the
2786 address "foo" as viewed by exit node "nickname". Based on a patch
2788 - Make tor --version --version dump the cvs Id of every file.
2791 Changes in version 0.0.9rc4 - 2004-11-28
2792 o Bugfixes on 0.0.8.1:
2793 - Make windows sockets actually non-blocking (oops), and handle
2794 win32 socket errors better.
2796 o Bugfixes on 0.0.9rc1:
2797 - Actually catch the -USR2 signal.
2800 Changes in version 0.0.9rc3 - 2004-11-25
2801 o Bugfixes on 0.0.8.1:
2802 - Flush the log file descriptor after we print "Tor opening log file",
2803 so we don't see those messages days later.
2805 o Bugfixes on 0.0.9rc1:
2806 - Make tor-resolve work again.
2807 - Avoid infinite loop in tor-resolve if tor hangs up on it.
2808 - Fix an assert trigger for clients/servers handling resolves.
2811 Changes in version 0.0.9rc2 - 2004-11-24
2812 o Bugfixes on 0.0.9rc1:
2813 - I broke socks5 support while fixing the eof bug.
2814 - Allow unitless bandwidths and intervals; they default to bytes
2816 - New servers don't start out hibernating; they are active until
2817 they run out of bytes, so they have a better estimate of how
2818 long it takes, and so their operators can know they're working.
2821 Changes in version 0.0.9rc1 - 2004-11-23
2822 o Bugfixes on 0.0.8.1:
2823 - Finally fix a bug that's been plaguing us for a year:
2824 With high load, circuit package window was reaching 0. Whenever
2825 we got a circuit-level sendme, we were reading a lot on each
2826 socket, but only writing out a bit. So we would eventually reach
2827 eof. This would be noticed and acted on even when there were still
2828 bytes sitting in the inbuf.
2829 - When poll() is interrupted, we shouldn't believe the revents values.
2831 o Bugfixes on 0.0.9pre6:
2832 - Fix hibernate bug that caused pre6 to be broken.
2833 - Don't keep rephist info for routers that haven't had activity for
2834 24 hours. (This matters now that clients have keys, since we track
2836 - Never call close_temp_logs while validating log options.
2837 - Fix backslash-escaping on tor.sh.in and torctl.in.
2840 - Implement weekly/monthly/daily accounting: now you specify your
2841 hibernation properties by
2842 AccountingMax N bytes|KB|MB|GB|TB
2843 AccountingStart day|week|month [day] HH:MM
2844 Defaults to "month 1 0:00".
2845 - Let bandwidth and interval config options be specified as 5 bytes,
2846 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
2847 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
2848 get back to normal.)
2849 - If your requested entry or exit node has advertised bandwidth 0,
2851 - Be more greedy about filling up relay cells -- we try reading again
2852 once we've processed the stuff we read, in case enough has arrived
2853 to fill the last cell completely.
2854 - Apply NT service patch from Osamu Fujino. Still needs more work.
2857 Changes in version 0.0.9pre6 - 2004-11-15
2858 o Bugfixes on 0.0.8.1:
2859 - Fix assert failure on malformed socks4a requests.
2860 - Use identity comparison, not nickname comparison, to choose which
2861 half of circuit-ID-space each side gets to use. This is needed
2862 because sometimes we think of a router as a nickname, and sometimes
2863 as a hex ID, and we can't predict what the other side will do.
2864 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
2865 write() call will fail and we handle it there.
2866 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
2867 and smartlist_len, which are two major profiling offenders.
2869 o Bugfixes on 0.0.9pre5:
2870 - Fix a bug in read_all that was corrupting config files on windows.
2871 - When we're raising the max number of open file descriptors to
2872 'unlimited', don't log that we just raised it to '-1'.
2873 - Include event code with events, as required by control-spec.txt.
2874 - Don't give a fingerprint when clients do --list-fingerprint:
2875 it's misleading, because it will never be the same again.
2876 - Stop using strlcpy in tor_strndup, since it was slowing us
2878 - Remove warn on startup about missing cached-directory file.
2879 - Make kill -USR1 work again.
2880 - Hibernate if we start tor during the "wait for wakeup-time" phase
2881 of an accounting interval. Log our hibernation plans better.
2882 - Authoritative dirservers now also cache their directory, so they
2883 have it on start-up.
2886 - Fetch running-routers; cache running-routers; compress
2887 running-routers; serve compressed running-routers.z
2888 - Add NSI installer script contributed by J Doe.
2889 - Commit VC6 and VC7 workspace/project files.
2890 - Commit a tor.spec for making RPM files, with help from jbash.
2891 - Add contrib/torctl.in contributed by Glenn Fink.
2892 - Implement the control-spec's SAVECONF command, to write your
2893 configuration to torrc.
2894 - Get cookie authentication for the controller closer to working.
2895 - Include control-spec.txt in the tarball.
2896 - When set_conf changes our server descriptor, upload a new copy.
2897 But don't upload it too often if there are frequent changes.
2898 - Document authentication config in man page, and document signals
2900 - Clean up confusing parts of man page and torrc.sample.
2901 - Make expand_filename handle ~ and ~username.
2902 - Use autoconf to enable largefile support where necessary. Use
2903 ftello where available, since ftell can fail at 2GB.
2904 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
2905 log more informatively.
2906 - Give a slightly more useful output for "tor -h".
2907 - Refuse application socks connections to port 0.
2908 - Check clock skew for verified servers, but allow unverified
2909 servers and clients to have any clock skew.
2910 - Break DirFetchPostPeriod into:
2911 - DirFetchPeriod for fetching full directory,
2912 - StatusFetchPeriod for fetching running-routers,
2913 - DirPostPeriod for posting server descriptor,
2914 - RendPostPeriod for posting hidden service descriptors.
2915 - Make sure the hidden service descriptors are at a random offset
2916 from each other, to hinder linkability.
2919 Changes in version 0.0.9pre5 - 2004-11-09
2920 o Bugfixes on 0.0.9pre4:
2921 - Fix a seg fault in unit tests (doesn't affect main program).
2922 - Fix an assert bug where a hidden service provider would fail if
2923 the first hop of his rendezvous circuit was down.
2924 - Hidden service operators now correctly handle version 1 style
2925 INTRODUCE1 cells (nobody generates them still, so not a critical
2927 - If do_hup fails, actually notice.
2928 - Handle more errnos from accept() without closing the listener.
2929 Some OpenBSD machines were closing their listeners because
2930 they ran out of file descriptors.
2931 - Send resolve cells to exit routers that are running a new
2932 enough version of the resolve code to work right.
2933 - Better handling of winsock includes on non-MSV win32 compilers.
2934 - Some people had wrapped their tor client/server in a script
2935 that would restart it whenever it died. This did not play well
2936 with our "shut down if your version is obsolete" code. Now people
2937 don't fetch a new directory if their local cached version is
2939 - Make our autogen.sh work on ksh as well as bash.
2942 - Hibernation: New config option "AccountingMaxKB" lets you
2943 set how many KBytes per month you want to allow your server to
2944 consume. Rather than spreading those bytes out evenly over the
2945 month, we instead hibernate for some of the month and pop up
2946 at a deterministic time, work until the bytes are consumed, then
2947 hibernate again. Config option "MonthlyAccountingStart" lets you
2948 specify which day of the month your billing cycle starts on.
2949 - Control interface: a separate program can now talk to your
2950 client/server over a socket, and get/set config options, receive
2951 notifications of circuits and streams starting/finishing/dying,
2952 bandwidth used, etc. The next step is to get some GUIs working.
2953 Let us know if you want to help out. See doc/control-spec.txt .
2954 - Ship a contrib/tor-control.py as an example script to interact
2955 with the control port.
2956 - "tor --hash-password zzyxz" will output a salted password for
2957 use in authenticating to the control interface.
2958 - New log format in config:
2959 "Log minsev[-maxsev] stdout|stderr|syslog" or
2960 "Log minsev[-maxsev] file /var/foo"
2963 - DirPolicy config option, to let people reject incoming addresses
2964 from their dirserver.
2965 - "tor --list-fingerprint" will list your identity key fingerprint
2967 - Add "pass" target for RedirectExit, to make it easier to break
2968 out of a sequence of RedirectExit rules.
2969 - Clients now generate a TLS cert too, in preparation for having
2970 them act more like real nodes.
2971 - Ship src/win32/ in the tarball, so people can use it to build.
2972 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
2974 - New "router-status" line in directory, to better bind each verified
2975 nickname to its identity key.
2976 - Deprecate unofficial config option abbreviations, and abbreviations
2977 not on the command line.
2978 - Add a pure-C tor-resolve implementation.
2979 - Use getrlimit and friends to ensure we can reach MaxConn (currently
2980 1024) file descriptors.
2982 o Code security improvements, inspired by Ilja:
2983 - Replace sprintf with snprintf. (I think they were all safe, but
2985 - Replace strcpy/strncpy with strlcpy in more places.
2986 - Avoid strcat; use snprintf or strlcat instead.
2987 - snprintf wrapper with consistent (though not C99) overflow behavior.
2990 Changes in version 0.0.9pre4 - 2004-10-17
2991 o Bugfixes on 0.0.9pre3:
2992 - If the server doesn't specify an exit policy, use the real default
2993 exit policy, not reject *:*.
2994 - Ignore fascistfirewall when uploading/downloading hidden service
2995 descriptors, since we go through Tor for those; and when using
2996 an HttpProxy, since we assume it can reach them all.
2997 - When looking for an authoritative dirserver, use only the ones
2998 configured at boot. Don't bother looking in the directory.
2999 - The rest of the fix for get_default_conf_file() on older win32.
3000 - Make 'Routerfile' config option obsolete.
3003 - New 'MyFamily nick1,...' config option for a server to
3004 specify other servers that shouldn't be used in the same circuit
3005 with it. Only believed if nick1 also specifies us.
3006 - New 'NodeFamily nick1,nick2,...' config option for a client to
3007 specify nodes that it doesn't want to use in the same circuit.
3008 - New 'Redirectexit pattern address:port' config option for a
3009 server to redirect exit connections, e.g. to a local squid.
3012 Changes in version 0.0.9pre3 - 2004-10-13
3013 o Bugfixes on 0.0.8.1:
3014 - Better torrc example lines for dirbindaddress and orbindaddress.
3015 - Improved bounds checking on parsed ints (e.g. config options and
3016 the ones we find in directories.)
3017 - Better handling of size_t vs int, so we're more robust on 64
3019 - Fix the rest of the bug where a newly started OR would appear
3020 as unverified even after we've added his fingerprint and hupped
3022 - Fix a bug from 0.0.7: when read() failed on a stream, we would
3023 close it without sending back an end. So 'connection refused'
3024 would simply be ignored and the user would get no response.
3026 o Bugfixes on 0.0.9pre2:
3027 - Serving the cached-on-disk directory to people is bad. We now
3028 provide no directory until we've fetched a fresh one.
3029 - Workaround for bug on windows where cached-directories get crlf
3031 - Make get_default_conf_file() work on older windows too.
3032 - If we write a *:* exit policy line in the descriptor, don't write
3033 any more exit policy lines.
3036 - Use only 0.0.9pre1 and later servers for resolve cells.
3037 - Make the dirservers file obsolete.
3038 - Include a dir-signing-key token in directories to tell the
3039 parsing entity which key is being used to sign.
3040 - Remove the built-in bulky default dirservers string.
3041 - New config option "Dirserver %s:%d [fingerprint]", which can be
3042 repeated as many times as needed. If no dirservers specified,
3043 default to moria1,moria2,tor26.
3044 - Make moria2 advertise a dirport of 80, so people behind firewalls
3045 will be able to get a directory.
3046 - Http proxy support
3047 - Dirservers translate requests for http://%s:%d/x to /x
3048 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
3049 be routed through this host.
3050 - Clients ask for /tor/x rather than /x for new enough dirservers.
3051 This way we can one day coexist peacefully with apache.
3052 - Clients specify a "Host: %s%d" http header, to be compatible
3053 with more proxies, and so running squid on an exit node can work.
3056 Changes in version 0.0.8.1 - 2004-10-13
3058 - Fix a seg fault that can be triggered remotely for Tor
3059 clients/servers with an open dirport.
3060 - Fix a rare assert trigger, where routerinfos for entries in
3061 our cpath would expire while we're building the path.
3062 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3063 - Fix a rare seg fault for people running hidden services on
3064 intermittent connections.
3065 - Fix a bug in parsing opt keywords with objects.
3066 - Fix a stale pointer assert bug when a stream detaches and
3068 - Fix a string format vulnerability (probably not exploitable)
3069 in reporting stats locally.
3070 - Fix an assert trigger: sometimes launching circuits can fail
3071 immediately, e.g. because too many circuits have failed recently.
3072 - Fix a compile warning on 64 bit platforms.
3075 Changes in version 0.0.9pre2 - 2004-10-03
3077 - Make fetching a cached directory work for 64-bit platforms too.
3078 - Make zlib.h a required header, not an optional header.
3081 Changes in version 0.0.9pre1 - 2004-10-01
3083 - Stop using separate defaults for no-config-file and
3084 empty-config-file. Now you have to explicitly turn off SocksPort,
3085 if you don't want it open.
3086 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3087 - Improve man page to mention more of the 0.0.8 features.
3088 - Fix a rare seg fault for people running hidden services on
3089 intermittent connections.
3090 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
3092 - Fix more dns related bugs: send back resolve_failed and end cells
3093 more reliably when the resolve fails, rather than closing the
3094 circuit and then trying to send the cell. Also attach dummy resolve
3095 connections to a circuit *before* calling dns_resolve(), to fix
3096 a bug where cached answers would never be sent in RESOLVED cells.
3097 - When we run out of disk space, or other log writing error, don't
3098 crash. Just stop logging to that log and continue.
3099 - We were starting to daemonize before we opened our logs, so if
3100 there were any problems opening logs, we would complain to stderr,
3101 which wouldn't work, and then mysteriously exit.
3102 - Fix a rare bug where sometimes a verified OR would connect to us
3103 before he'd uploaded his descriptor, which would cause us to
3104 assign conn->nickname as though he's unverified. Now we look through
3105 the fingerprint list to see if he's there.
3106 - Fix a rare assert trigger, where routerinfos for entries in
3107 our cpath would expire while we're building the path.
3110 - Clients can ask dirservers for /dir.z to get a compressed version
3111 of the directory. Only works for servers running 0.0.9, of course.
3112 - Make clients cache directories and use them to seed their router
3113 lists at startup. This means clients have a datadir again.
3114 - Configuration infrastructure support for warning on obsolete
3116 - Respond to content-encoding headers by trying to uncompress as
3118 - Reply with a deflated directory when a client asks for "dir.z".
3119 We could use allow-encodings instead, but allow-encodings isn't
3120 specified in HTTP 1.0.
3121 - Raise the max dns workers from 50 to 100.
3122 - Discourage people from setting their dirfetchpostperiod more often
3123 than once per minute.
3124 - Protect dirservers from overzealous descriptor uploading -- wait
3125 10 seconds after directory gets dirty, before regenerating.
3128 Changes in version 0.0.8 - 2004-08-25
3129 o Port it to SunOS 5.9 / Athena
3132 Changes in version 0.0.8rc2 - 2004-08-20
3133 o Make it compile on cygwin again.
3134 o When picking unverified routers, skip those with low uptime and/or
3135 low bandwidth, depending on what properties you care about.
3138 Changes in version 0.0.8rc1 - 2004-08-18
3139 o Changes from 0.0.7.3:
3141 - Fix assert triggers: if the other side returns an address 0.0.0.0,
3142 don't put it into the client dns cache.
3143 - If a begin failed due to exit policy, but we believe the IP address
3144 should have been allowed, switch that router to exitpolicy reject *:*
3145 until we get our next directory.
3147 - Clients choose nodes proportional to advertised bandwidth.
3148 - Avoid using nodes with low uptime as introduction points.
3149 - Handle servers with dynamic IP addresses: don't replace
3150 options->Address with the resolved one at startup, and
3151 detect our address right before we make a routerinfo each time.
3152 - 'FascistFirewall' option to pick dirservers and ORs on specific
3153 ports; plus 'FirewallPorts' config option to tell FascistFirewall
3154 which ports are open. (Defaults to 80,443)
3155 - Be more aggressive about trying to make circuits when the network
3156 has changed (e.g. when you unsuspend your laptop).
3157 - Check for time skew on http headers; report date in response to
3159 - If the entrynode config line has only one node, don't pick it as
3161 - Add strict{entry|exit}nodes config options. If set to 1, then
3162 we refuse to build circuits that don't include the specified entry
3164 - OutboundBindAddress config option, to bind to a specific
3165 IP address for outgoing connect()s.
3166 - End truncated log entries (e.g. directories) with "[truncated]".
3168 o Patches to 0.0.8preX:
3170 - Patches to compile and run on win32 again (maybe)?
3171 - Fix crash when looking for ~/.torrc with no $HOME set.
3172 - Fix a race bug in the unit tests.
3173 - Handle verified/unverified name collisions better when new
3174 routerinfo's arrive in a directory.
3175 - Sometimes routers were getting entered into the stats before
3176 we'd assigned their identity_digest. Oops.
3177 - Only pick and establish intro points after we've gotten a
3180 - AllowUnverifiedNodes config option to let circuits choose no-name
3181 routers in entry,middle,exit,introduction,rendezvous positions.
3182 Allow middle and rendezvous positions by default.
3183 - Add a man page for tor-resolve.
3186 Changes in version 0.0.7.3 - 2004-08-12
3187 o Stop dnsworkers from triggering an assert failure when you
3188 ask them to resolve the host "".
3191 Changes in version 0.0.8pre3 - 2004-08-09
3192 o Changes from 0.0.7.2:
3193 - Allow multiple ORs with same nickname in routerlist -- now when
3194 people give us one identity key for a nickname, then later
3195 another, we don't constantly complain until the first expires.
3196 - Remember used bandwidth (both in and out), and publish 15-minute
3197 snapshots for the past day into our descriptor.
3198 - You can now fetch $DIRURL/running-routers to get just the
3199 running-routers line, not the whole descriptor list. (But
3200 clients don't use this yet.)
3201 - When people mistakenly use Tor as an http proxy, point them
3202 at the tor-doc.html rather than the INSTALL.
3203 - Remove our mostly unused -- and broken -- hex_encode()
3204 function. Use base16_encode() instead. (Thanks to Timo Lindfors
3205 for pointing out this bug.)
3206 - Rotate onion keys every 12 hours, not every 2 hours, so we have
3207 fewer problems with people using the wrong key.
3208 - Change the default exit policy to reject the default edonkey,
3209 kazaa, gnutella ports.
3210 - Add replace_file() to util.[ch] to handle win32's rename().
3212 o Changes from 0.0.8preX:
3213 - Fix two bugs in saving onion keys to disk when rotating, so
3214 hopefully we'll get fewer people using old onion keys.
3215 - Fix an assert error that was making SocksPolicy not work.
3216 - Be willing to expire routers that have an open dirport -- it's
3217 just the authoritative dirservers we want to not forget.
3218 - Reject tor-resolve requests for .onion addresses early, so we
3219 don't build a whole rendezvous circuit and then fail.
3220 - When you're warning a server that he's unverified, don't cry
3222 - Fix a race condition: don't try to extend onto a connection
3223 that's still handshaking.
3224 - For servers in clique mode, require the conn to be open before
3225 you'll choose it for your path.
3226 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
3227 end relay cell, etc.
3228 - Measure bandwidth capacity over the last 24 hours, not just 12
3229 - Bugfix: authoritative dirservers were making and signing a new
3230 directory for each client, rather than reusing the cached one.
3233 Changes in version 0.0.8pre2 - 2004-08-04
3234 o Changes from 0.0.7.2:
3236 - Check directory signature _before_ you decide whether you're
3237 you're running an obsolete version and should exit.
3238 - Check directory signature _before_ you parse the running-routers
3239 list to decide who's running or verified.
3240 - Bugfixes and features:
3241 - Check return value of fclose while writing to disk, so we don't
3242 end up with broken files when servers run out of disk space.
3243 - Log a warning if the user uses an unsafe socks variant, so people
3244 are more likely to learn about privoxy or socat.
3245 - Dirservers now include RFC1123-style dates in the HTTP headers,
3246 which one day we will use to better detect clock skew.
3248 o Changes from 0.0.8pre1:
3249 - Make it compile without warnings again on win32.
3250 - Log a warning if you're running an unverified server, to let you
3251 know you might want to get it verified.
3252 - Only pick a default nickname if you plan to be a server.
3255 Changes in version 0.0.8pre1 - 2004-07-23
3257 - Made our unit tests compile again on OpenBSD 3.5, and tor
3258 itself compile again on OpenBSD on a sparc64.
3259 - We were neglecting milliseconds when logging on win32, so
3260 everything appeared to happen at the beginning of each second.
3263 - 'Extend' relay cell payloads now include the digest of the
3264 intended next hop's identity key. Now we can verify that we're
3265 extending to the right router, and also extend to routers we
3266 hadn't heard of before.
3269 - Tor nodes can now act as relays (with an advertised ORPort)
3270 without being manually verified by the dirserver operators.
3271 - Uploaded descriptors of unverified routers are now accepted
3272 by the dirservers, and included in the directory.
3273 - Verified routers are listed by nickname in the running-routers
3274 list; unverified routers are listed as "$<fingerprint>".
3275 - We now use hash-of-identity-key in most places rather than
3276 nickname or addr:port, for improved security/flexibility.
3277 - To avoid Sybil attacks, paths still use only verified servers.
3278 But now we have a chance to play around with hybrid approaches.
3279 - Nodes track bandwidth usage to estimate capacity (not used yet).
3280 - ClientOnly option for nodes that never want to become servers.
3281 - Directory caching.
3282 - "AuthoritativeDir 1" option for the official dirservers.
3283 - Now other nodes (clients and servers) will cache the latest
3284 directory they've pulled down.
3285 - They can enable their DirPort to serve it to others.
3286 - Clients will pull down a directory from any node with an open
3287 DirPort, and check the signature/timestamp correctly.
3288 - Authoritative dirservers now fetch directories from other
3289 authdirservers, to stay better synced.
3290 - Running-routers list tells who's down also, along with noting
3291 if they're verified (listed by nickname) or unverified (listed
3293 - Allow dirservers to serve running-router list separately.
3294 This isn't used yet.
3295 - ORs connect-on-demand to other ORs
3296 - If you get an extend cell to an OR you're not connected to,
3297 connect, handshake, and forward the create cell.
3298 - The authoritative dirservers stay connected to everybody,
3299 and everybody stays connected to 0.0.7 servers, but otherwise
3300 clients/servers expire unused connections after 5 minutes.
3301 - When servers get a sigint, they delay 30 seconds (refusing new
3302 connections) then exit. A second sigint causes immediate exit.
3303 - File and name management:
3304 - Look for .torrc if no CONFDIR "torrc" is found.
3305 - If no datadir is defined, then choose, make, and secure ~/.tor
3307 - If torrc not found, exitpolicy reject *:*.
3308 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
3309 - If no nickname is defined, derive default from hostname.
3310 - Rename secret key files, e.g. identity.key -> secret_id_key,
3311 to discourage people from mailing their identity key to tor-ops.
3312 - Refuse to build a circuit before the directory has arrived --
3313 it won't work anyway, since you won't know the right onion keys
3315 - Try other dirservers immediately if the one you try is down. This
3316 should tolerate down dirservers better now.
3317 - Parse tor version numbers so we can do an is-newer-than check
3318 rather than an is-in-the-list check.
3319 - New socks command 'resolve', to let us shim gethostbyname()
3321 - A 'tor_resolve' script to access the socks resolve functionality.
3322 - A new socks-extensions.txt doc file to describe our
3323 interpretation and extensions to the socks protocols.
3324 - Add a ContactInfo option, which gets published in descriptor.
3325 - Publish OR uptime in descriptor (and thus in directory) too.
3326 - Write tor version at the top of each log file
3327 - New docs in the tarball:
3329 - Document that you should proxy your SSL traffic too.
3332 Changes in version 0.0.7.2 - 2004-07-07
3333 o A better fix for the 0.0.0.0 problem, that will hopefully
3334 eliminate the remaining related assertion failures.
3337 Changes in version 0.0.7.1 - 2004-07-04
3338 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
3339 since internally we use 0.0.0.0 to signify "not yet resolved".
3342 Changes in version 0.0.7 - 2004-06-07
3343 o Updated the man page to reflect the new features.
3346 Changes in version 0.0.7rc2 - 2004-06-06
3347 o Changes from 0.0.7rc1:
3348 - Make it build on Win32 again.
3349 o Changes from 0.0.6.2:
3350 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
3354 Changes in version 0.0.7rc1 - 2004-06-02
3356 - On sighup, we were adding another log without removing the first
3357 one. So log messages would get duplicated n times for n sighups.
3358 - Several cases of using a connection after we'd freed it. The
3359 problem was that connections that are pending resolve are in both
3360 the pending_resolve tree, and also the circuit's resolving_streams
3361 list. When you want to remove one, you must remove it from both.
3362 - Fix a double-mark-for-close where an end cell arrived for a
3363 resolving stream, and then the resolve failed.
3364 - Check directory signatures based on name of signer, not on whom
3365 we got the directory from. This will let us cache directories more
3368 - Crank up some of our constants to handle more users.
3371 Changes in version 0.0.7pre1 - 2004-06-02
3372 o Fixes for crashes and other obnoxious bugs:
3373 - Fix an epipe bug: sometimes when directory connections failed
3374 to connect, we would give them a chance to flush before closing
3376 - When we detached from a circuit because of resolvefailed, we
3377 would immediately try the same circuit twice more, and then
3378 give up on the resolve thinking we'd tried three different
3380 - Limit the number of intro circuits we'll attempt to build for a
3381 hidden service per 15-minute period.
3382 - Check recommended-software string *early*, before actually parsing
3383 the directory. Thus we can detect an obsolete version and exit,
3384 even if the new directory format doesn't parse.
3385 o Fixes for security bugs:
3386 - Remember which nodes are dirservers when you startup, and if a
3387 random OR enables his dirport, don't automatically assume he's
3388 a trusted dirserver.
3390 - Directory connections were asking the wrong poll socket to
3391 start writing, and not asking themselves to start writing.
3392 - When we detached from a circuit because we sent a begin but
3393 didn't get a connected, we would use it again the first time;
3394 but after that we would correctly switch to a different one.
3395 - Stop warning when the first onion decrypt attempt fails; they
3396 will sometimes legitimately fail now that we rotate keys.
3397 - Override unaligned-access-ok check when $host_cpu is ia64 or
3398 arm. Apparently they allow it but the kernel whines.
3399 - Dirservers try to reconnect periodically too, in case connections
3401 - Fix some memory leaks in directory servers.
3402 - Allow backslash in Win32 filenames.
3403 - Made Tor build complain-free on FreeBSD, hopefully without
3404 breaking other BSD builds. We'll see.
3406 - Doxygen markup on all functions and global variables.
3407 - Make directory functions update routerlist, not replace it. So
3408 now directory disagreements are not so critical a problem.
3409 - Remove the upper limit on number of descriptors in a dirserver's
3410 directory (not that we were anywhere close).
3411 - Allow multiple logfiles at different severity ranges.
3412 - Allow *BindAddress to specify ":port" rather than setting *Port
3413 separately. Allow multiple instances of each BindAddress config
3414 option, so you can bind to multiple interfaces if you want.
3415 - Allow multiple exit policy lines, which are processed in order.
3416 Now we don't need that huge line with all the commas in it.
3417 - Enable accept/reject policies on SOCKS connections, so you can bind
3418 to 0.0.0.0 but still control who can use your OP.
3421 Changes in version 0.0.6.2 - 2004-05-16
3422 o Our integrity-checking digest was checking only the most recent cell,
3423 not the previous cells like we'd thought.
3424 Thanks to Stefan Mark for finding the flaw!
3427 Changes in version 0.0.6.1 - 2004-05-06
3428 o Fix two bugs in our AES counter-mode implementation (this affected
3429 onion-level stream encryption, but not TLS-level). It turns
3430 out we were doing something much more akin to a 16-character
3431 polyalphabetic cipher. Oops.
3432 Thanks to Stefan Mark for finding the flaw!
3433 o Retire moria3 as a directory server, and add tor26 as a directory
3437 Changes in version 0.0.6 - 2004-05-02
3441 Changes in version 0.0.6rc4 - 2004-05-01
3442 o Update the built-in dirservers list to use the new directory format
3443 o Fix a rare seg fault: if a node offering a hidden service attempts
3444 to build a circuit to Alice's rendezvous point and fails before it
3445 reaches the last hop, it retries with a different circuit, but
3447 o Handle windows socket errors correctly.
3450 Changes in version 0.0.6rc3 - 2004-04-28
3451 o Don't expire non-general excess circuits (if we had enough
3452 circuits open, we were expiring rendezvous circuits -- even
3453 when they had a stream attached. oops.)
3454 o Fetch randomness from /dev/urandom better (not via fopen/fread)
3455 o Better debugging for tls errors
3456 o Some versions of openssl have an SSL_pending function that erroneously
3457 returns bytes when there is a non-application record pending.
3458 o Set Content-Type on the directory and hidserv descriptor.
3459 o Remove IVs from cipher code, since AES-ctr has none.
3460 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
3461 o We were using an array of length zero in a few places.
3462 o win32's gethostbyname can't resolve an IP to an IP.
3463 o win32's close can't close a socket.
3466 Changes in version 0.0.6rc2 - 2004-04-26
3467 o Fix a bug where we were closing tls connections intermittently.
3468 It turns out openssl keeps its errors around -- so if an error
3469 happens, and you don't ask about it, and then another openssl
3470 operation happens and succeeds, and you ask if there was an error,
3471 it tells you about the first error. Fun fun.
3472 o Fix a bug that's been lurking since 27 may 03 (!)
3473 When passing back a destroy cell, we would use the wrong circ id.
3474 'Mostly harmless', but still worth fixing.
3475 o Since we don't support truncateds much, don't bother sending them;
3476 just close the circ.
3477 o check for <machine/limits.h> so we build on NetBSD again (I hope).
3478 o don't crash if a conn that sent a begin has suddenly lost its circuit
3479 (this was quite rare).
3482 Changes in version 0.0.6rc1 - 2004-04-25
3483 o We now rotate link (tls context) keys and onion keys.
3484 o CREATE cells now include oaep padding, so you can tell
3485 if you decrypted them correctly.
3486 o Add bandwidthburst to server descriptor.
3487 o Directories now say which dirserver signed them.
3488 o Use a tor_assert macro that logs failed assertions too.
3491 Changes in version 0.0.6pre5 - 2004-04-18
3492 o changes from 0.0.6pre4:
3493 - make tor build on broken freebsd 5.2 installs
3494 - fix a failed assert when you try an intro point, get a nack, and try
3495 a second one and it works.
3496 - when alice uses a port that the hidden service doesn't accept,
3497 it now sends back an end cell (denied by exit policy). otherwise
3498 alice would just have to wait to time out.
3499 - fix another rare bug: when we had tried all the intro
3500 points for a hidden service, we fetched the descriptor
3501 again, but we left our introcirc thinking it had already
3502 sent an intro, so it kept waiting for a response...
3503 - bugfix: when you sleep your hidden-service laptop, as soon
3504 as it wakes up it tries to upload a service descriptor, but
3505 socketpair fails for some reason (localhost not up yet?).
3506 now we simply give up on that upload, and we'll try again later.
3507 i'd still like to find the bug though.
3508 - if an intro circ waiting for an ack dies before getting one, then
3510 - we were reusing stale service descriptors and refetching usable
3514 Changes in version 0.0.6pre4 - 2004-04-14
3515 o changes from 0.0.6pre3:
3516 - when bob fails to connect to the rendezvous point, and his
3517 circ didn't fail because of the rendezvous point itself, then
3518 he retries a couple of times
3519 - we expire introduction and rendezvous circs more thoroughly
3520 (sometimes they were hanging around forever)
3521 - we expire unattached rendezvous streams that have been around
3522 too long (they were sticking around forever).
3523 - fix a measly fencepost error that was crashing everybody with
3527 Changes in version 0.0.6pre3 - 2004-04-14
3528 o changes from 0.0.6pre2:
3529 - make hup work again
3530 - fix some memory leaks for dirservers
3531 - allow more skew in rendezvous descriptor timestamps, to help
3532 handle people like blanu who don't know what time it is
3533 - normal circs are 3 hops, but some rend/intro circs are 4, if
3534 the initiator doesn't get to choose the last hop
3535 - send acks for introductions, so alice can know whether to try
3537 - bob publishes intro points more correctly
3538 o changes from 0.0.5:
3539 - fix an assert trigger that's been plaguing us since the days
3540 of 0.0.2prexx (thanks weasel!)
3541 - retry stream correctly when we fail to connect because of
3542 exit-policy-reject (should try another) or can't-resolve-address
3543 (also should try another, because dns on random internet servers
3545 - when we hup a dirserver and we've *removed* a server from the
3546 approved-routers list, now we remove that server from the
3547 in-memory directories too
3550 Changes in version 0.0.6pre2 - 2004-04-08
3551 o We fixed our base32 implementation. Now it works on all architectures.
3554 Changes in version 0.0.6pre1 - 2004-04-08
3556 - Hidden services and rendezvous points are implemented. Go to
3557 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
3558 hidden services. (This only works via a socks4a proxy such as
3559 Privoxy, and currently it's quite slow.)
3562 Changes in version 0.0.5 - 2004-03-30
3566 Changes in version 0.0.5rc3 - 2004-03-29
3567 o Install torrc as torrc.sample -- we no longer clobber your
3569 o Re-enable recommendedversion checking (we broke it in rc2, oops)
3570 o Add in a 'notice' log level for things the operator should hear
3571 but that aren't warnings
3574 Changes in version 0.0.5rc2 - 2004-03-29
3575 o Hold socks connection open until reply is flushed (if possible)
3576 o Make exit nodes resolve IPs to IPs immediately, rather than asking
3577 the dns farm to do it.
3578 o Fix c99 aliasing warnings in rephist.c
3579 o Don't include server descriptors that are older than 24 hours in the
3581 o Give socks 'reject' replies their whole 15s to attempt to flush,
3582 rather than seeing the 60s timeout and assuming the flush had failed.
3583 o Clean automake droppings from the cvs repository
3586 Changes in version 0.0.5rc1 - 2004-03-28
3587 o Fix mangled-state bug in directory fetching (was causing sigpipes).
3588 o Only build circuits after we've fetched the directory: clients were
3589 using only the directory servers before they'd fetched a directory.
3590 This also means longer startup time; so it goes.
3591 o Fix an assert trigger where an OP would fail to handshake, and we'd
3592 expect it to have a nickname.
3593 o Work around a tsocks bug: do a socks reject when AP connection dies
3594 early, else tsocks goes into an infinite loop.
3597 Changes in version 0.0.4 - 2004-03-26
3598 o When connecting to a dirserver or OR and the network is down,
3602 Changes in version 0.0.3 - 2004-03-26
3603 o Warn and fail if server chose a nickname with illegal characters
3604 o Port to Solaris and Sparc:
3605 - include missing header fcntl.h
3606 - have autoconf find -lsocket -lnsl automatically
3607 - deal with hardware word alignment
3608 - make uname() work (solaris has a different return convention)
3609 - switch from using signal() to sigaction()
3610 o Preliminary work on reputation system:
3611 - Keep statistics on success/fail of connect attempts; they're published
3612 by kill -USR1 currently.
3613 - Add a RunTesting option to try to learn link state by creating test
3614 circuits, even when SocksPort is off.
3615 - Remove unused open circuits when there are too many.
3618 Changes in version 0.0.2 - 2004-03-19
3619 - Include strlcpy and strlcat for safer string ops
3620 - define INADDR_NONE so we compile (but still not run) on solaris
3623 Changes in version 0.0.2pre27 - 2004-03-14
3625 - Allow internal tor networks (we were rejecting internal IPs,
3626 now we allow them if they're set explicitly).
3627 - And fix a few endian issues.
3630 Changes in version 0.0.2pre26 - 2004-03-14
3632 - If a stream times out after 15s without a connected cell, don't
3633 try that circuit again: try a new one.
3634 - Retry streams at most 4 times. Then give up.
3635 - When a dirserver gets a descriptor from an unknown router, it
3636 logs its fingerprint (so the dirserver operator can choose to
3637 accept it even without mail from the server operator).
3638 - Inform unapproved servers when we reject their descriptors.
3639 - Make tor build on Windows again. It works as a client, who knows
3641 - Clearer instructions in the torrc for how to set up a server.
3642 - Be more efficient about reading fd's when our global token bucket
3643 (used for rate limiting) becomes empty.
3645 - Stop asserting that computers always go forward in time. It's
3647 - When we sent a cell (e.g. destroy) and then marked an OR connection
3648 expired, we might close it before finishing a flush if the other
3649 side isn't reading right then.
3650 - Don't allow dirservers to start if they haven't defined
3652 - We were caching transient dns failures. Oops.
3653 - Prevent servers from publishing an internal IP as their address.
3654 - Address a strcat vulnerability in circuit.c
3657 Changes in version 0.0.2pre25 - 2004-03-04
3659 - Put the OR's IP in its router descriptor, not its fqdn. That way
3660 we'll stop being stalled by gethostbyname for nodes with flaky dns,
3663 - If the user typed in an address that didn't resolve, the server
3667 Changes in version 0.0.2pre24 - 2004-03-03
3669 - Fix an assertion failure in dns.c, where we were trying to dequeue
3670 a pending dns resolve even if it wasn't pending
3671 - Fix a spurious socks5 warning about still trying to write after the
3672 connection is finished.
3673 - Hold certain marked_for_close connections open until they're finished
3674 flushing, rather than losing bytes by closing them too early.
3675 - Correctly report the reason for ending a stream
3676 - Remove some duplicate calls to connection_mark_for_close
3677 - Put switch_id and start_daemon earlier in the boot sequence, so it
3678 will actually try to chdir() to options.DataDirectory
3679 - Make 'make test' exit(1) if a test fails; fix some unit tests
3680 - Make tor fail when you use a config option it doesn't know about,
3681 rather than warn and continue.
3682 - Make --version work
3683 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
3686 Changes in version 0.0.2pre23 - 2004-02-29
3688 - Print a statement when the first circ is finished, so the user
3690 - If a relay cell is unrecognized at the end of the circuit,
3691 send back a destroy. (So attacks to mutate cells are more
3693 - New config option 'excludenodes' to avoid certain nodes for circuits.
3694 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
3695 so you can collect coredumps there.
3697 - Fix a bug in tls flushing where sometimes data got wedged and
3698 didn't flush until more data got sent. Hopefully this bug was
3699 a big factor in the random delays we were seeing.
3700 - Make 'connected' cells include the resolved IP, so the client
3701 dns cache actually gets populated.
3702 - Disallow changing from ORPort=0 to ORPort>0 on hup.
3703 - When we time-out on a stream and detach from the circuit, send an
3704 end cell down it first.
3705 - Only warn about an unknown router (in exitnodes, entrynodes,
3706 excludenodes) after we've fetched a directory.
3709 Changes in version 0.0.2pre22 - 2004-02-26
3711 - Servers publish less revealing uname information in descriptors.
3712 - More memory tracking and assertions, to crash more usefully when
3714 - If the default torrc isn't there, just use some default defaults.
3715 Plus provide an internal dirservers file if they don't have one.
3716 - When the user tries to use Tor as an http proxy, give them an http
3717 501 failure explaining that we're a socks proxy.
3718 - Dump a new router.desc on hup, to help confused people who change
3719 their exit policies and then wonder why router.desc doesn't reflect
3721 - Clean up the generic tor.sh init script that we ship with.
3723 - If the exit stream is pending on the resolve, and a destroy arrives,
3724 then the stream wasn't getting removed from the pending list. I
3725 think this was the one causing recent server crashes.
3726 - Use a more robust poll on OSX 10.3, since their poll is flaky.
3727 - When it couldn't resolve any dirservers, it was useless from then on.
3728 Now it reloads the RouterFile (or default dirservers) if it has no
3730 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
3731 many users don't even *have* a /usr/local/sbin/.
3734 Changes in version 0.0.2pre21 - 2004-02-18
3736 - There's a ChangeLog file that actually reflects the changelog.
3737 - There's a 'torify' wrapper script, with an accompanying
3738 tor-tsocks.conf, that simplifies the process of using tsocks for
3739 tor. It even has a man page.
3740 - The tor binary gets installed to sbin rather than bin now.
3741 - Retry streams where the connected cell hasn't arrived in 15 seconds
3742 - Clean up exit policy handling -- get the default out of the torrc,
3743 so we can update it without forcing each server operator to fix
3745 - Allow imaps and pop3s in default exit policy
3747 - Prevent picking middleman nodes as the last node in the circuit
3750 Changes in version 0.0.2pre20 - 2004-01-30
3752 - We now have a deb package, and it's in debian unstable. Go to
3754 - I've split the TotalBandwidth option into BandwidthRate (how many
3755 bytes per second you want to allow, long-term) and
3756 BandwidthBurst (how many bytes you will allow at once before the cap
3757 kicks in). This better token bucket approach lets you, say, set
3758 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
3759 performance while not exceeding your monthly bandwidth quota.
3760 - Push out a tls record's worth of data once you've got it, rather
3761 than waiting until you've read everything waiting to be read. This
3762 may improve performance by pipelining better. We'll see.
3763 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
3764 from failed circuits (if they haven't been connected yet) and attach
3766 - Expire old streams that haven't managed to connect. Some day we'll
3767 have them reattach to new circuits instead.
3770 - Fix several memory leaks that were causing servers to become bloated
3772 - Fix a few very rare assert triggers. A few more remain.
3773 - Setuid to User _before_ complaining about running as root.
3776 Changes in version 0.0.2pre19 - 2004-01-07
3778 - Fix deadlock condition in dns farm. We were telling a child to die by
3779 closing the parent's file descriptor to him. But newer children were
3780 inheriting the open file descriptor from the parent, and since they
3781 weren't closing it, the socket never closed, so the child never read
3782 eof, so he never knew to exit. Similarly, dns workers were holding
3783 open other sockets, leading to all sorts of chaos.
3784 - New cleaner daemon() code for forking and backgrounding.
3785 - If you log to a file, it now prints an entry at the top of the
3786 logfile so you know it's working.
3787 - The onionskin challenge length was 30 bytes longer than necessary.
3788 - Started to patch up the spec so it's not quite so out of date.
3791 Changes in version 0.0.2pre18 - 2004-01-02
3793 - Fix endian issues with the 'integrity' field in the relay header.
3794 - Fix a potential bug where connections in state
3795 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
3798 Changes in version 0.0.2pre17 - 2003-12-30
3800 - Made --debuglogfile (or any second log file, actually) work.
3801 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
3802 adversary could force us into an infinite loop.
3805 - Each onionskin handshake now includes a hash of the computed key,
3806 to prove the server's identity and help perfect forward secrecy.
3807 - Changed cell size from 256 to 512 bytes (working toward compatibility
3809 - Changed cell length to 2 bytes, and moved it to the relay header.
3810 - Implemented end-to-end integrity checking for the payloads of
3812 - Separated streamid from 'recognized' (otherwise circuits will get
3813 messed up when we try to have streams exit from the middle). We
3814 use the integrity-checking to confirm that a cell is addressed to
3816 - Randomize the initial circid and streamid values, so an adversary who
3817 breaks into a node can't learn how many circuits or streams have
3821 Changes in version 0.0.2pre16 - 2003-12-14
3823 - Fixed a bug that made HUP trigger an assert
3824 - Fixed a bug where a circuit that immediately failed wasn't being
3825 counted as a failed circuit in counting retries.
3828 - Now we close the circuit when we get a truncated cell: otherwise we're
3829 open to an anonymity attack where a bad node in the path truncates
3830 the circuit and then we open streams at him.
3831 - Add port ranges to exit policies
3832 - Add a conservative default exit policy
3833 - Warn if you're running tor as root
3834 - on HUP, retry OR connections and close/rebind listeners
3835 - options.EntryNodes: try these nodes first when picking the first node
3836 - options.ExitNodes: if your best choices happen to include any of
3837 your preferred exit nodes, you choose among just those preferred
3839 - options.ExcludedNodes: nodes that are never picked in path building
3842 Changes in version 0.0.2pre15 - 2003-12-03
3843 o Robustness and bugfixes:
3844 - Sometimes clients would cache incorrect DNS resolves, which would
3845 really screw things up.
3846 - An OP that goes offline would slowly leak all its sockets and stop
3848 - A wide variety of bugfixes in exit node selection, exit policy
3849 handling, and processing pending streams when a new circuit is
3851 - Pick nodes for a path only from those the directory says are up
3852 - Choose randomly from all running dirservers, not always the first one
3853 - Increase allowed http header size for directory fetch.
3854 - Stop writing to stderr (if we're daemonized it will be closed).
3855 - Enable -g always, so cores will be more useful to me.
3856 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
3859 - Wrote a man page. It lists commonly used options.
3862 - Change default loglevel to warn.
3863 - Make PidFile default to null rather than littering in your CWD.
3864 - OnionRouter config option is now obsolete. Instead it just checks
3866 - Moved to a single unified torrc file for both clients and servers.
3869 Changes in version 0.0.2pre14 - 2003-11-29
3870 o Robustness and bugfixes:
3871 - Force the admin to make the DataDirectory himself
3872 - to get ownership/permissions right
3873 - so clients no longer make a DataDirectory and then never use it
3874 - fix bug where a client who was offline for 45 minutes would never
3875 pull down a directory again
3876 - fix (or at least hide really well) the dns assert bug that was
3877 causing server crashes
3878 - warnings and improved robustness wrt clockskew for certs
3879 - use the native daemon(3) to daemonize, when available
3880 - exit if bind() fails
3881 - exit if neither socksport nor orport is defined
3882 - include our own tor_timegm (Win32 doesn't have its own)
3883 - bugfix for win32 with lots of connections
3884 - fix minor bias in PRNG
3885 - make dirserver more robust to corrupt cached directory
3888 - Wrote the design document (woo)
3890 o Circuit building and exit policies:
3891 - Circuits no longer try to use nodes that the directory has told them
3893 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
3894 bitcounts (18.0.0.0/8).
3895 - Make AP connections standby for a circuit if no suitable circuit
3896 exists, rather than failing
3897 - Circuits choose exit node based on addr/port, exit policies, and
3898 which AP connections are standing by
3899 - Bump min pathlen from 2 to 3
3900 - Relay end cells have a payload to describe why the stream ended.
3901 - If the stream failed because of exit policy, try again with a new
3903 - Clients have a dns cache to remember resolved addresses.
3904 - Notice more quickly when we have no working circuits
3907 - APPort is now called SocksPort
3908 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
3910 - RecommendedVersions is now a config variable rather than
3911 hardcoded (for dirservers)
3912 - Reloads config on HUP
3913 - Usage info on -h or --help
3914 - If you set User and Group config vars, it'll setu/gid to them.
3916 Changes in version 0.0.2pre13 - 2003-10-19
3917 o General stability:
3918 - SSL_write no longer fails when it returns WANTWRITE and the number
3919 of bytes in the buf has changed by the next SSL_write call.
3920 - Fix segfault fetching directory when network is down
3921 - Fix a variety of minor memory leaks
3922 - Dirservers reload the fingerprints file on HUP, so I don't have
3923 to take down the network when I approve a new router
3924 - Default server config file has explicit Address line to specify fqdn
3927 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
3928 - Make listener connections not ever alloc bufs
3930 o Autoconf improvements:
3931 - don't clobber an external CFLAGS in ./configure
3932 - Make install now works
3933 - create var/lib/tor on make install
3934 - autocreate a tor.sh initscript to help distribs
3935 - autocreate the torrc and sample-server-torrc with correct paths
3937 o Log files and Daemonizing now work:
3938 - If --DebugLogFile is specified, log to it at -l debug
3939 - If --LogFile is specified, use it instead of commandline
3940 - If --RunAsDaemon is set, tor forks and backgrounds on startup