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.
48 - Check for addresses with invalid characters at the exit as well as at
49 the client, and warn less verbosely when they fail. You can override
50 this by setting ServerDNSAllowNonRFC953Addresses to 1.
51 - Adapt a patch from goodell to let the contrib/exitlist script
52 take arguments rather than require direct editing.
54 o Minor features (controller):
55 - Track reasons for OR connection failure; make these reasons available
56 via the controller interface. (Patch from Mike Perry.)
57 - Add a SOCKS_BAD_HOSTNAME client status event so controllers can learn
58 when clients are sending malformed hostnames to Tor.
59 - Clean up documentation for controller status events.
62 Changes in version 0.1.2.6-alpha - 2007-01-09
64 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
65 connection handles more than 4 gigs in either direction, we crash.
66 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
67 advertised exit node, somebody might try to exit from us when
68 we're bootstrapping and before we've built your descriptor yet.
69 Refuse the connection rather than crashing.
72 - Warn if we (as a server) find that we've resolved an address that we
73 weren't planning to resolve.
74 - Warn that using select() on any libevent version before 1.1 will be
75 unnecessarily slow (even for select()).
76 - Flush ERR-level controller status events just like we currently
77 flush ERR-level log events, so that a Tor shutdown doesn't prevent
78 the controller from learning about current events.
80 o Minor features (more controller status events):
81 - Implement EXTERNAL_ADDRESS server status event so controllers can
82 learn when our address changes.
83 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
84 can learn when directories reject our descriptor.
85 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
86 can learn when a client application is speaking a non-socks protocol
88 - Implement DANGEROUS_SOCKS client status event so controllers
89 can learn when a client application is leaking DNS addresses.
90 - Implement BUG general status event so controllers can learn when
91 Tor is unhappy about its internal invariants.
92 - Implement CLOCK_SKEW general status event so controllers can learn
93 when Tor thinks the system clock is set incorrectly.
94 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
95 server status events so controllers can learn when their descriptors
96 are accepted by a directory.
97 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
98 server status events so controllers can learn about Tor's progress in
99 deciding whether it's reachable from the outside.
100 - Implement BAD_LIBEVENT general status event so controllers can learn
101 when we have a version/method combination in libevent that needs to
103 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
104 and DNS_USELESS server status events so controllers can learn
105 about changes to DNS server status.
107 o Minor features (directory):
108 - Authorities no longer recommend exits as guards if this would shift
109 too much load to the exit nodes.
112 Changes in version 0.1.2.5-alpha - 2007-01-06
114 - Enable write limiting as well as read limiting. Now we sacrifice
115 capacity if we're pushing out lots of directory traffic, rather
116 than overrunning the user's intended bandwidth limits.
117 - Include TLS overhead when counting bandwidth usage; previously, we
118 would count only the bytes sent over TLS, but not the bytes used
120 - Support running the Tor service with a torrc not in the same
121 directory as tor.exe and default to using the torrc located in
122 the %appdata%\Tor\ of the user who installed the service. Patch
124 - Servers now check for the case when common DNS requests are going to
125 wildcarded addresses (i.e. all getting the same answer), and change
126 their exit policy to reject *:* if it's happening.
127 - Implement BEGIN_DIR cells, so we can connect to the directory
128 server via TLS to do encrypted directory requests rather than
129 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
130 config options if you like.
132 o Minor features (config and docs):
133 - Start using the state file to store bandwidth accounting data:
134 the bw_accounting file is now obsolete. We'll keep generating it
135 for a while for people who are still using 0.1.2.4-alpha.
136 - Try to batch changes to the state file so that we do as few
137 disk writes as possible while still storing important things in
139 - The state file and the bw_accounting file get saved less often when
140 the AvoidDiskWrites config option is set.
141 - Make PIDFile work on Windows (untested).
142 - Add internal descriptions for a bunch of configuration options:
143 accessible via controller interface and in comments in saved
145 - Reject *:563 (NNTPS) in the default exit policy. We already reject
146 NNTP by default, so this seems like a sensible addition.
147 - Clients now reject hostnames with invalid characters. This should
148 avoid some inadvertent info leaks. Add an option
149 AllowNonRFC953Hostnames to disable this behavior, in case somebody
150 is running a private network with hosts called @, !, and #.
151 - Add a maintainer script to tell us which options are missing
152 documentation: "make check-docs".
153 - Add a new address-spec.txt document to describe our special-case
154 addresses: .exit, .onion, and .noconnnect.
156 o Minor features (DNS):
157 - Ongoing work on eventdns infrastructure: now it has dns server
158 and ipv6 support. One day Tor will make use of it.
159 - Add client-side caching for reverse DNS lookups.
160 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
161 - When we change nameservers or IP addresses, reset and re-launch
162 our tests for DNS hijacking.
164 o Minor features (directory):
165 - Authorities now specify server versions in networkstatus. This adds
166 about 2% to the side of compressed networkstatus docs, and allows
167 clients to tell which servers support BEGIN_DIR and which don't.
168 The implementation is forward-compatible with a proposed future
169 protocol version scheme not tied to Tor versions.
170 - DirServer configuration lines now have an orport= option so
171 clients can open encrypted tunnels to the authorities without
172 having downloaded their descriptors yet. Enabled for moria1,
173 moria2, tor26, and lefkada now in the default configuration.
174 - Directory servers are more willing to send a 503 "busy" if they
175 are near their write limit, especially for v1 directory requests.
176 Now they can use their limited bandwidth for actual Tor traffic.
177 - Clients track responses with status 503 from dirservers. After a
178 dirserver has given us a 503, we try not to use it until an hour has
179 gone by, or until we have no dirservers that haven't given us a 503.
180 - When we get a 503 from a directory, and we're not a server, we don't
181 count the failure against the total number of failures allowed
182 for the thing we're trying to download.
183 - Report X-Your-Address-Is correctly from tunneled directory
184 connections; don't report X-Your-Address-Is when it's an internal
185 address; and never believe reported remote addresses when they're
187 - Protect against an unlikely DoS attack on directory servers.
188 - Add a BadDirectory flag to network status docs so that authorities
189 can (eventually) tell clients about caches they believe to be
192 o Minor features (controller):
193 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
194 - Reimplement GETINFO so that info/names stays in sync with the
196 - Implement "GETINFO fingerprint".
197 - Implement "SETEVENTS GUARD" so controllers can get updates on
198 entry guard status as it changes.
200 o Minor features (clean up obsolete pieces):
201 - Remove some options that have been deprecated since at least
202 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
203 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
205 - We no longer look for identity and onion keys in "identity.key" and
206 "onion.key" -- these were replaced by secret_id_key and
207 secret_onion_key in 0.0.8pre1.
208 - We no longer require unrecognized directory entries to be
211 o Major bugfixes (security):
212 - Stop sending the HttpProxyAuthenticator string to directory
213 servers when directory connections are tunnelled through Tor.
214 - Clients no longer store bandwidth history in the state file.
215 - Do not log introduction points for hidden services if SafeLogging
217 - When generating bandwidth history, round down to the nearest
218 1k. When storing accounting data, round up to the nearest 1k.
219 - When we're running as a server, remember when we last rotated onion
220 keys, so that we will rotate keys once they're a week old even if
221 we never stay up for a week ourselves.
223 o Major bugfixes (other):
224 - Fix a longstanding bug in eventdns that prevented the count of
225 timed-out resolves from ever being reset. This bug caused us to
226 give up on a nameserver the third time it timed out, and try it
227 10 seconds later... and to give up on it every time it timed out
229 - Take out the '5 second' timeout from the connection retry
230 schedule. Now the first connect attempt will wait a full 10
231 seconds before switching to a new circuit. Perhaps this will help
232 a lot. Based on observations from Mike Perry.
233 - Fix a bug on the Windows implementation of tor_mmap_file() that
234 would prevent the cached-routers file from ever loading. Reported
238 - Fix an assert failure when a directory authority sets
239 AuthDirRejectUnlisted and then receives a descriptor from an
240 unlisted router. Reported by seeess.
241 - Avoid a double-free when parsing malformed DirServer lines.
242 - Fix a bug when a BSD-style PF socket is first used. Patch from
244 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
245 to resolve an address at a given exit node even when they ask for
247 - Servers no longer ever list themselves in their "family" line,
248 even if configured to do so. This makes it easier to configure
249 family lists conveniently.
250 - When running as a server, don't fall back to 127.0.0.1 when no
251 nameservers are configured in /etc/resolv.conf; instead, make the
252 user fix resolv.conf or specify nameservers explicitly. (Resolves
254 - Stop accepting certain malformed ports in configured exit policies.
255 - Don't re-write the fingerprint file every restart, unless it has
257 - Stop warning when a single nameserver fails: only warn when _all_ of
258 our nameservers have failed. Also, when we only have one nameserver,
259 raise the threshold for deciding that the nameserver is dead.
260 - Directory authorities now only decide that routers are reachable
261 if their identity keys are as expected.
262 - When the user uses bad syntax in the Log config line, stop
263 suggesting other bad syntax as a replacement.
264 - Correctly detect ipv6 DNS capability on OpenBSD.
266 o Minor bugfixes (controller):
267 - Report the circuit number correctly in STREAM CLOSED events. Bug
268 reported by Mike Perry.
269 - Do not report bizarre values for results of accounting GETINFOs
270 when the last second's write or read exceeds the allotted bandwidth.
271 - Report "unrecognized key" rather than an empty string when the
272 controller tries to fetch a networkstatus that doesn't exist.
275 Changes in version 0.1.2.4-alpha - 2006-12-03
277 - Add support for using natd; this allows FreeBSDs earlier than
278 5.1.2 to have ipfw send connections through Tor without using
279 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
282 - Make all connections to addresses of the form ".noconnect"
283 immediately get closed. This lets application/controller combos
284 successfully test whether they're talking to the same Tor by
285 watching for STREAM events.
286 - Make cross.sh cross-compilation script work even when autogen.sh
287 hasn't been run. (Patch from Michael Mohr.)
288 - Statistics dumped by -USR2 now include a breakdown of public key
289 operations, for profiling.
292 - Fix a major leak when directory authorities parse their
293 approved-routers list, a minor memory leak when we fail to pick
294 an exit node, and a few rare leaks on errors.
295 - Handle TransPort connections even when the server sends data before
296 the client sends data. Previously, the connection would just hang
297 until the client sent data. (Patch from tup based on patch from
299 - Avoid assert failure when our cached-routers file is empty on
303 - Don't log spurious warnings when we see a circuit close reason we
304 don't recognize; it's probably just from a newer version of Tor.
305 - Have directory authorities allow larger amounts of drift in uptime
306 without replacing the server descriptor: previously, a server that
307 restarted every 30 minutes could have 48 "interesting" descriptors
309 - Start linking to the Tor specification and Tor reference manual
310 correctly in the Windows installer.
311 - Add Vidalia to the OS X uninstaller script, so when we uninstall
312 Tor/Privoxy we also uninstall Vidalia.
313 - Resume building on Irix64, and fix a lot of warnings from its
315 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
316 when we're running as a client.
319 Changes in version 0.1.2.3-alpha - 2006-10-29
321 - Prepare for servers to publish descriptors less often: never
322 discard a descriptor simply for being too old until either it is
323 recommended by no authorities, or until we get a better one for
324 the same router. Make caches consider retaining old recommended
325 routers for even longer.
326 - If most authorities set a BadExit flag for a server, clients
327 don't think of it as a general-purpose exit. Clients only consider
328 authorities that advertise themselves as listing bad exits.
329 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
330 headers for content, so that we can work better in the presence of
331 caching HTTP proxies.
332 - Allow authorities to list nodes as bad exits by fingerprint or by
335 o Minor features, controller:
336 - Add a REASON field to CIRC events; for backward compatibility, this
337 field is sent only to controllers that have enabled the extended
338 event format. Also, add additional reason codes to explain why
339 a given circuit has been destroyed or truncated. (Patches from
341 - Add a REMOTE_REASON field to extended CIRC events to tell the
342 controller about why a remote OR told us to close a circuit.
343 - Stream events also now have REASON and REMOTE_REASON fields,
344 working much like those for circuit events.
345 - There's now a GETINFO ns/... field so that controllers can ask Tor
346 about the current status of a router.
347 - A new event type "NS" to inform a controller when our opinion of
348 a router's status has changed.
349 - Add a GETINFO events/names and GETINFO features/names so controllers
350 can tell which events and features are supported.
351 - A new CLEARDNSCACHE signal to allow controllers to clear the
352 client-side DNS cache without expiring circuits.
355 - When the user sends a NEWNYM signal, clear the client-side DNS
356 cache too. Otherwise we continue to act on previous information.
359 - Avoid sending junk to controllers or segfaulting when a controller
360 uses EVENT_NEW_DESC with verbose nicknames.
361 - Stop triggering asserts if the controller tries to extend hidden
362 service circuits (reported by mwenge).
363 - Avoid infinite loop on unexpected controller input.
364 - When the controller does a "GETINFO network-status", tell it
365 about even those routers whose descriptors are very old, and use
366 long nicknames where appropriate.
367 - Change NT service functions to be loaded on demand. This lets us
368 build with MinGW without breaking Tor for Windows 98 users.
369 - Do DirPort reachability tests less often, since a single test
370 chews through many circuits before giving up.
371 - In the hidden service example in torrc.sample, stop recommending
372 esoteric and discouraged hidden service options.
373 - When stopping an NT service, wait up to 10 sec for it to actually
374 stop. (Patch from Matt Edman; resolves bug 295.)
375 - Fix handling of verbose nicknames with ORCONN controller events:
376 make them show up exactly when requested, rather than exactly when
378 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
379 printing a duplicate "$" in the keys we send (reported by mwenge).
380 - Correctly set maximum connection limit on Cygwin. (This time
382 - Try to detect Windows correctly when cross-compiling.
383 - Detect the size of the routers file correctly even if it is
384 corrupted (on systems without mmap) or not page-aligned (on systems
385 with mmap). This bug was harmless.
386 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
387 to open a stream fails; now we do in more cases. This should
388 make clients able to find a good exit faster in some cases, since
389 unhandleable requests will now get an error rather than timing out.
390 - Resolve two memory leaks when rebuilding the on-disk router cache
391 (reported by fookoowa).
392 - Clean up minor code warnings suggested by the MIPSpro C compiler,
393 and reported by some Centos users.
394 - Controller signals now work on non-Unix platforms that don't define
395 SIGUSR1 and SIGUSR2 the way we expect.
396 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
397 values before failing, and always enables eventdns.
398 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
399 Try to fix this in configure.in by checking for most functions
400 before we check for libevent.
403 Changes in version 0.1.2.2-alpha - 2006-10-07
405 - Make our async eventdns library on-by-default for Tor servers,
406 and plan to deprecate the separate dnsworker threads.
407 - Add server-side support for "reverse" DNS lookups (using PTR
408 records so clients can determine the canonical hostname for a given
409 IPv4 address). Only supported by servers using eventdns; servers
410 now announce in their descriptors whether they support eventdns.
411 - Specify and implement client-side SOCKS5 interface for reverse DNS
412 lookups (see doc/socks-extensions.txt).
413 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
414 connect to directory servers through Tor. Previously, clients needed
415 to find Tor exits to make private connections to directory servers.
416 - Avoid choosing Exit nodes for entry or middle hops when the
417 total bandwidth available from non-Exit nodes is much higher than
418 the total bandwidth available from Exit nodes.
419 - Workaround for name servers (like Earthlink's) that hijack failing
420 DNS requests and replace the no-such-server answer with a "helpful"
421 redirect to an advertising-driven search portal. Also work around
422 DNS hijackers who "helpfully" decline to hijack known-invalid
423 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
424 lets you turn it off.
425 - Send out a burst of long-range padding cells once we've established
426 that we're reachable. Spread them over 4 circuits, so hopefully
427 a few will be fast. This exercises our bandwidth and bootstraps
428 us into the directory more quickly.
430 o New/improved config options:
431 - Add new config option "ResolvConf" to let the server operator
432 choose an alternate resolve.conf file when using eventdns.
433 - Add an "EnforceDistinctSubnets" option to control our "exclude
434 servers on the same /16" behavior. It's still on by default; this
435 is mostly for people who want to operate private test networks with
436 all the machines on the same subnet.
437 - If one of our entry guards is on the ExcludeNodes list, or the
438 directory authorities don't think it's a good guard, treat it as
439 if it were unlisted: stop using it as a guard, and throw it off
440 the guards list if it stays that way for a long time.
441 - Allow directory authorities to be marked separately as authorities
442 for the v1 directory protocol, the v2 directory protocol, and
443 as hidden service directories, to make it easier to retire old
444 authorities. V1 authorities should set "HSAuthoritativeDir 1"
445 to continue being hidden service authorities too.
446 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
448 o Minor features, controller:
449 - Fix CIRC controller events so that controllers can learn the
450 identity digests of non-Named servers used in circuit paths.
451 - Let controllers ask for more useful identifiers for servers. Instead
452 of learning identity digests for un-Named servers and nicknames
453 for Named servers, the new identifiers include digest, nickname,
454 and indication of Named status. Off by default; see control-spec.txt
455 for more information.
456 - Add a "getinfo address" controller command so it can display Tor's
457 best guess to the user.
458 - New controller event to alert the controller when our server
459 descriptor has changed.
460 - Give more meaningful errors on controller authentication failure.
462 o Minor features, other:
463 - When asked to resolve a hostname, don't use non-exit servers unless
464 requested to do so. This allows servers with broken DNS to be
465 useful to the network.
466 - Divide eventdns log messages into warn and info messages.
467 - Reserve the nickname "Unnamed" for routers that can't pick
468 a hostname: any router can call itself Unnamed; directory
469 authorities will never allocate Unnamed to any particular router;
470 clients won't believe that any router is the canonical Unnamed.
471 - Only include function names in log messages for info/debug messages.
472 For notice/warn/err, the content of the message should be clear on
473 its own, and printing the function name only confuses users.
474 - Avoid some false positives during reachability testing: don't try
475 to test via a server that's on the same /24 as us.
476 - If we fail to build a circuit to an intended enclave, and it's
477 not mandatory that we use that enclave, stop wanting it.
478 - When eventdns is enabled, allow multithreaded builds on NetBSD and
479 OpenBSD. (We had previously disabled threads on these platforms
480 because they didn't have working thread-safe resolver functions.)
482 o Major bugfixes, anonymity/security:
483 - If a client asked for a server by name, and there's a named server
484 in our network-status but we don't have its descriptor yet, we
485 could return an unnamed server instead.
486 - Fix NetBSD bug that could allow someone to force uninitialized RAM
487 to be sent to a server's DNS resolver. This only affects NetBSD
488 and other platforms that do not bounds-check tolower().
489 - Reject (most) attempts to use Tor circuits with length one. (If
490 many people start using Tor as a one-hop proxy, exit nodes become
491 a more attractive target for compromise.)
492 - Just because your DirPort is open doesn't mean people should be
493 able to remotely teach you about hidden service descriptors. Now
494 only accept rendezvous posts if you've got HSAuthoritativeDir set.
496 o Major bugfixes, other:
497 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
498 - When a client asks the server to resolve (not connect to)
499 an address, and it has a cached answer, give them the cached answer.
500 Previously, the server would give them no answer at all.
501 - Allow really slow clients to not hang up five minutes into their
502 directory downloads (suggested by Adam J. Richter).
503 - We were building exactly the wrong circuits when we anticipated
504 hidden service requirements, meaning Tor would have to build all
505 its circuits on demand.
506 - Avoid crashing when we mmap a router cache file of size 0.
507 - When testing reachability of our DirPort, don't launch new
508 tests when there's already one in progress -- unreachable
509 servers were stacking up dozens of testing streams.
511 o Minor bugfixes, correctness:
512 - If we're a directory mirror and we ask for "all" network status
513 documents, we would discard status documents from authorities
515 - Avoid a memory corruption bug when creating a hash table for
517 - Avoid controller-triggered crash when misusing certain commands
518 from a v0 controller on platforms that do not handle
519 printf("%s",NULL) gracefully.
520 - Don't crash when a controller sends a third argument to an
521 "extendcircuit" request.
522 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
523 response; fix error code when "getinfo dir/status/" fails.
524 - Avoid crash when telling controller stream-status and a stream
526 - Patch from Adam Langley to fix assert() in eventdns.c.
527 - Fix a debug log message in eventdns to say "X resolved to Y"
528 instead of "X resolved to X".
529 - Make eventdns give strings for DNS errors, not just error numbers.
530 - Track unreachable entry guards correctly: don't conflate
531 'unreachable by us right now' with 'listed as down by the directory
532 authorities'. With the old code, if a guard was unreachable by
533 us but listed as running, it would clog our guard list forever.
534 - Behave correctly in case we ever have a network with more than
535 2GB/s total advertised capacity.
536 - Make TrackExitHosts case-insensitive, and fix the behavior of
537 ".suffix" TrackExitHosts items to avoid matching in the middle of
539 - Finally fix the openssl warnings from newer gccs that believe that
540 ignoring a return value is okay, but casting a return value and
541 then ignoring it is a sign of madness.
542 - Prevent the contrib/exitlist script from printing the same
543 result more than once.
544 - Patch from Steve Hildrey: Generate network status correctly on
545 non-versioning dirservers.
546 - Don't listen to the X-Your-Address-Is hint if you did the lookup
547 via Tor; otherwise you'll think you're the exit node's IP address.
549 o Minor bugfixes, performance:
550 - Two small performance improvements on parsing descriptors.
551 - Major performance improvement on inserting descriptors: change
552 algorithm from O(n^2) to O(n).
553 - Make the common memory allocation path faster on machines where
554 malloc(0) returns a pointer.
555 - Start remembering X-Your-Address-Is directory hints even if you're
556 a client, so you can become a server more smoothly.
557 - Avoid duplicate entries on MyFamily line in server descriptor.
559 o Packaging, features:
560 - Remove architecture from OS X builds. The official builds are
561 now universal binaries.
562 - The Debian package now uses --verify-config when (re)starting,
563 to distinguish configuration errors from other errors.
564 - Update RPMs to require libevent 1.1b.
566 o Packaging, bugfixes:
567 - Patches so Tor builds with MinGW on Windows.
568 - Patches so Tor might run on Cygwin again.
569 - Resume building on non-gcc compilers and ancient gcc. Resume
570 building with the -O0 compile flag. Resume building cleanly on
572 - Run correctly on OS X platforms with case-sensitive filesystems.
573 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
574 - Add autoconf checks so Tor can build on Solaris x86 again.
577 - Documented (and renamed) ServerDNSSearchDomains and
578 ServerDNSResolvConfFile options.
579 - Be clearer that the *ListenAddress directives can be repeated
583 Changes in version 0.1.2.1-alpha - 2006-08-27
585 - Add "eventdns" async dns library from Adam Langley, tweaked to
586 build on OSX and Windows. Only enabled if you pass the
587 --enable-eventdns argument to configure.
588 - Allow servers with no hostname or IP address to learn their
589 IP address by asking the directory authorities. This code only
590 kicks in when you would normally have exited with a "no address"
591 error. Nothing's authenticated, so use with care.
592 - Rather than waiting a fixed amount of time between retrying
593 application connections, we wait only 5 seconds for the first,
594 10 seconds for the second, and 15 seconds for each retry after
595 that. Hopefully this will improve the expected user experience.
596 - Patch from Tup to add support for transparent AP connections:
597 this basically bundles the functionality of trans-proxy-tor
598 into the Tor mainline. Now hosts with compliant pf/netfilter
599 implementations can redirect TCP connections straight to Tor
600 without diverting through SOCKS. Needs docs.
601 - Busy directory servers save lots of memory by spooling server
602 descriptors, v1 directories, and v2 networkstatus docs to buffers
603 as needed rather than en masse. Also mmap the cached-routers
604 files, so we don't need to keep the whole thing in memory too.
605 - Automatically avoid picking more than one node from the same
606 /16 network when constructing a circuit.
607 - Revise and clean up the torrc.sample that we ship with; add
608 a section for BandwidthRate and BandwidthBurst.
611 - Split circuit_t into origin_circuit_t and or_circuit_t, and
612 split connection_t into edge, or, dir, control, and base structs.
613 These will save quite a bit of memory on busy servers, and they'll
614 also help us track down bugs in the code and bugs in the spec.
615 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
616 or later. Log when we are doing this, so we can diagnose it when
617 it fails. (Also, recommend libevent 1.1b for kqueue and
618 win32 methods; deprecate libevent 1.0b harder; make libevent
619 recommendation system saner.)
620 - Start being able to build universal binaries on OS X (thanks
622 - Export the default exit policy via the control port, so controllers
623 don't need to guess what it is / will be later.
624 - Add a man page entry for ProtocolWarnings.
625 - Add TestVia config option to the man page.
626 - Remove even more protocol-related warnings from Tor server logs,
627 such as bad TLS handshakes and malformed begin cells.
628 - Stop fetching descriptors if you're not a dir mirror and you
629 haven't tried to establish any circuits lately. [This currently
630 causes some dangerous behavior, because when you start up again
631 you'll use your ancient server descriptors.]
632 - New DirPort behavior: if you have your dirport set, you download
633 descriptors aggressively like a directory mirror, whether or not
635 - Get rid of the router_retry_connections notion. Now routers
636 no longer try to rebuild long-term connections to directory
637 authorities, and directory authorities no longer try to rebuild
638 long-term connections to all servers. We still don't hang up
639 connections in these two cases though -- we need to look at it
640 more carefully to avoid flapping, and we likely need to wait til
642 - Drop compatibility with obsolete Tors that permit create cells
643 to have the wrong circ_id_type.
644 - Re-enable per-connection rate limiting. Get rid of the "OP
645 bandwidth" concept. Lay groundwork for "bandwidth classes" --
646 separate global buckets that apply depending on what sort of conn
648 - Start publishing one minute or so after we find our ORPort
649 to be reachable. This will help reduce the number of descriptors
650 we have for ourselves floating around, since it's quite likely
651 other things (e.g. DirPort) will change during that minute too.
652 - Fork the v1 directory protocol into its own spec document,
653 and mark dir-spec.txt as the currently correct (v2) spec.
656 - When we find our DirPort to be reachable, publish a new descriptor
657 so we'll tell the world (reported by pnx).
658 - Publish a new descriptor after we hup/reload. This is important
659 if our config has changed such that we'll want to start advertising
660 our DirPort now, etc.
661 - Allow Tor to start when RunAsDaemon is set but no logs are set.
662 - When we have a state file we cannot parse, tell the user and
663 move it aside. Now we avoid situations where the user starts
664 Tor in 1904, Tor writes a state file with that timestamp in it,
665 the user fixes her clock, and Tor refuses to start.
666 - Fix configure.in to not produce broken configure files with
667 more recent versions of autoconf. Thanks to Clint for his auto*
669 - "tor --verify-config" now exits with -1(255) or 0 depending on
670 whether the config options are bad or good.
671 - Resolve bug 321 when using dnsworkers: append a period to every
672 address we resolve at the exit node, so that we do not accidentally
673 pick up local addresses, and so that failing searches are retried
674 in the resolver search domains. (This is already solved for
675 eventdns.) (This breaks Blossom servers for now.)
676 - If we are using an exit enclave and we can't connect, e.g. because
677 its webserver is misconfigured to not listen on localhost, then
678 back off and try connecting from somewhere else before we fail.
681 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
682 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
683 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
684 when the IP address is mapped through MapAddress to a hostname.
685 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
686 useless IPv6 DNS resolves.
687 - Patch suggested by Karsten Loesing: respond to SIGNAL command
688 before we execute the signal, in case the signal shuts us down.
689 - Clean up AllowInvalidNodes man page entry.
690 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
691 - Add more asserts to track down an assert error on a windows Tor
692 server with connection_add being called with socket == -1.
693 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
694 - Fix misleading log messages: an entry guard that is "unlisted",
695 as well as not known to be "down" (because we've never heard
696 of it), is not therefore "up".
697 - Remove code to special-case "-cvs" ending, since it has not
698 actually mattered since 0.0.9.
699 - Make our socks5 handling more robust to broken socks clients:
700 throw out everything waiting on the buffer in between socks
701 handshake phases, since they can't possibly (so the theory
702 goes) have predicted what we plan to respond to them.
705 Changes in version 0.1.1.26 - 2006-12-14
707 - Stop sending the HttpProxyAuthenticator string to directory
708 servers when directory connections are tunnelled through Tor.
709 - Clients no longer store bandwidth history in the state file.
710 - Do not log introduction points for hidden services if SafeLogging
714 - Fix an assert failure when a directory authority sets
715 AuthDirRejectUnlisted and then receives a descriptor from an
716 unlisted router (reported by seeess).
719 Changes in version 0.1.1.25 - 2006-11-04
721 - When a client asks us to resolve (rather than connect to)
722 an address, and we have a cached answer, give them the cached
723 answer. Previously, we would give them no answer at all.
724 - We were building exactly the wrong circuits when we predict
725 hidden service requirements, meaning Tor would have to build all
726 its circuits on demand.
727 - If none of our live entry guards have a high uptime, but we
728 require a guard with a high uptime, try adding a new guard before
729 we give up on the requirement. This patch should make long-lived
730 connections more stable on average.
731 - When testing reachability of our DirPort, don't launch new
732 tests when there's already one in progress -- unreachable
733 servers were stacking up dozens of testing streams.
736 - When the user sends a NEWNYM signal, clear the client-side DNS
737 cache too. Otherwise we continue to act on previous information.
740 - Avoid a memory corruption bug when creating a hash table for
742 - Avoid possibility of controller-triggered crash when misusing
743 certain commands from a v0 controller on platforms that do not
744 handle printf("%s",NULL) gracefully.
745 - Avoid infinite loop on unexpected controller input.
746 - Don't log spurious warnings when we see a circuit close reason we
747 don't recognize; it's probably just from a newer version of Tor.
748 - Add Vidalia to the OS X uninstaller script, so when we uninstall
749 Tor/Privoxy we also uninstall Vidalia.
752 Changes in version 0.1.1.24 - 2006-09-29
754 - Allow really slow clients to not hang up five minutes into their
755 directory downloads (suggested by Adam J. Richter).
756 - Fix major performance regression from 0.1.0.x: instead of checking
757 whether we have enough directory information every time we want to
758 do something, only check when the directory information has changed.
759 This should improve client CPU usage by 25-50%.
760 - Don't crash if, after a server has been running for a while,
761 it can't resolve its hostname.
762 - When a client asks us to resolve (not connect to) an address,
763 and we have a cached answer, give them the cached answer.
764 Previously, we would give them no answer at all.
767 - Allow Tor to start when RunAsDaemon is set but no logs are set.
768 - Don't crash when the controller receives a third argument to an
769 "extendcircuit" request.
770 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
771 response; fix error code when "getinfo dir/status/" fails.
772 - Fix configure.in to not produce broken configure files with
773 more recent versions of autoconf. Thanks to Clint for his auto*
775 - Fix security bug on NetBSD that could allow someone to force
776 uninitialized RAM to be sent to a server's DNS resolver. This
777 only affects NetBSD and other platforms that do not bounds-check
779 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
780 methods: these are known to be buggy.
781 - If we're a directory mirror and we ask for "all" network status
782 documents, we would discard status documents from authorities
786 Changes in version 0.1.1.23 - 2006-07-30
788 - Fast Tor servers, especially exit nodes, were triggering asserts
789 due to a bug in handling the list of pending DNS resolves. Some
790 bugs still remain here; we're hunting them.
791 - Entry guards could crash clients by sending unexpected input.
792 - More fixes on reachability testing: if you find yourself reachable,
793 then don't ever make any client requests (so you stop predicting
794 circuits), then hup or have your clock jump, then later your IP
795 changes, you won't think circuits are working, so you won't try to
796 test reachability, so you won't publish.
799 - Avoid a crash if the controller does a resetconf firewallports
800 and then a setconf fascistfirewall=1.
801 - Avoid an integer underflow when the dir authority decides whether
802 a router is stable: we might wrongly label it stable, and compute
803 a slightly wrong median stability, when a descriptor is published
805 - Fix a place where we might trigger an assert if we can't build our
806 own server descriptor yet.
809 Changes in version 0.1.1.22 - 2006-07-05
811 - Fix a big bug that was causing servers to not find themselves
812 reachable if they changed IP addresses. Since only 0.1.1.22+
813 servers can do reachability testing correctly, now we automatically
814 make sure to test via one of these.
815 - Fix to allow clients and mirrors to learn directory info from
816 descriptor downloads that get cut off partway through.
817 - Directory authorities had a bug in deciding if a newly published
818 descriptor was novel enough to make everybody want a copy -- a few
819 servers seem to be publishing new descriptors many times a minute.
821 - Fix a rare bug that was causing some servers to complain about
822 "closing wedged cpuworkers" and skip some circuit create requests.
823 - Make the Exit flag in directory status documents actually work.
826 Changes in version 0.1.1.21 - 2006-06-10
827 o Crash and assert fixes from 0.1.1.20:
828 - Fix a rare crash on Tor servers that have enabled hibernation.
829 - Fix a seg fault on startup for Tor networks that use only one
831 - Fix an assert from a race condition that occurs on Tor servers
832 while exiting, where various threads are trying to log that they're
833 exiting, and delete the logs, at the same time.
834 - Make our unit tests pass again on certain obscure platforms.
837 - Add support for building SUSE RPM packages.
838 - Speed up initial bootstrapping for clients: if we are making our
839 first ever connection to any entry guard, then don't mark it down
841 - When only one Tor server in the network is labelled as a guard,
842 and we've already picked him, we would cycle endlessly picking him
843 again, being unhappy about it, etc. Now we specifically exclude
844 current guards when picking a new guard.
845 - Servers send create cells more reliably after the TLS connection
846 is established: we were sometimes forgetting to send half of them
847 when we had more than one pending.
848 - If we get a create cell that asks us to extend somewhere, but the
849 Tor server there doesn't match the expected digest, we now send
850 a destroy cell back, rather than silently doing nothing.
851 - Make options->RedirectExit work again.
852 - Make cookie authentication for the controller work again.
853 - Stop being picky about unusual characters in the arguments to
854 mapaddress. It's none of our business.
855 - Add a new config option "TestVia" that lets you specify preferred
856 middle hops to use for test circuits. Perhaps this will let me
857 debug the reachability problems better.
859 o Log / documentation fixes:
860 - If we're a server and some peer has a broken TLS certificate, don't
861 log about it unless ProtocolWarnings is set, i.e., we want to hear
862 about protocol violations by others.
863 - Fix spelling of VirtualAddrNetwork in man page.
864 - Add a better explanation at the top of the autogenerated torrc file
865 about what happened to our old torrc.
868 Changes in version 0.1.1.20 - 2006-05-23
869 o Crash and assert fixes from 0.1.0.17:
870 - Fix assert bug in close_logs() on exit: when we close and delete
871 logs, remove them all from the global "logfiles" list.
872 - Fix an assert error when we're out of space in the connection_list
873 and we try to post a hidden service descriptor (reported by Peter
875 - Fix a rare assert error when we've tried all intro points for
876 a hidden service and we try fetching the service descriptor again:
877 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed".
878 - Setconf SocksListenAddress kills Tor if it fails to bind. Now back
879 out and refuse the setconf if it would fail.
880 - If you specify a relative torrc path and you set RunAsDaemon in
881 your torrc, then it chdir()'s to the new directory. If you then
882 HUP, it tries to load the new torrc location, fails, and exits.
883 The fix: no longer allow a relative path to torrc when using -f.
884 - Check for integer overflows in more places, when adding elements
885 to smartlists. This could possibly prevent a buffer overflow
886 on malicious huge inputs.
888 o Security fixes, major:
889 - When we're printing strings from the network, don't try to print
890 non-printable characters. Now we're safer against shell escape
891 sequence exploits, and also against attacks to fool users into
892 misreading their logs.
893 - Implement entry guards: automatically choose a handful of entry
894 nodes and stick with them for all circuits. Only pick new guards
895 when the ones you have are unsuitable, and if the old guards
896 become suitable again, switch back. This will increase security
897 dramatically against certain end-point attacks. The EntryNodes
898 config option now provides some hints about which entry guards you
899 want to use most; and StrictEntryNodes means to only use those.
901 - Implement exit enclaves: if we know an IP address for the
902 destination, and there's a running Tor server at that address
903 which allows exit to the destination, then extend the circuit to
904 that exit first. This provides end-to-end encryption and end-to-end
905 authentication. Also, if the user wants a .exit address or enclave,
906 use 4 hops rather than 3, and cannibalize a general circ for it
908 - Obey our firewall options more faithfully:
909 . If we can't get to a dirserver directly, try going via Tor.
910 . Don't ever try to connect (as a client) to a place our
911 firewall options forbid.
912 . If we specify a proxy and also firewall options, obey the
913 firewall options even when we're using the proxy: some proxies
914 can only proxy to certain destinations.
915 - Make clients regenerate their keys when their IP address changes.
916 - For the OS X package's modified privoxy config file, comment
917 out the "logfile" line so we don't log everything passed
919 - Our TLS handshakes were generating a single public/private
920 keypair for the TLS context, rather than making a new one for
921 each new connection. Oops. (But we were still rotating them
922 periodically, so it's not so bad.)
923 - When we were cannibalizing a circuit with a particular exit
924 node in mind, we weren't checking to see if that exit node was
925 already present earlier in the circuit. Now we are.
926 - Require server descriptors to list IPv4 addresses -- hostnames
927 are no longer allowed. This also fixes potential vulnerabilities
928 to servers providing hostnames as their address and then
929 preferentially resolving them so they can partition users.
930 - Our logic to decide if the OR we connected to was the right guy
931 was brittle and maybe open to a mitm for invalid routers.
933 o Security fixes, minor:
934 - Adjust tor-spec.txt to parameterize cell and key lengths. Now
935 Ian Goldberg can prove things about our handshake protocol more
937 - Make directory authorities generate a separate "guard" flag to
938 mean "would make a good entry guard". Clients now honor the
939 is_guard flag rather than looking at is_fast or is_stable.
940 - Try to list MyFamily elements by key, not by nickname, and warn
941 if we've not heard of a server.
942 - Start using RAND_bytes rather than RAND_pseudo_bytes from
943 OpenSSL. Also, reseed our entropy every hour, not just at
944 startup. And add entropy in 512-bit chunks, not 160-bit chunks.
945 - Refuse server descriptors where the fingerprint line doesn't match
946 the included identity key. Tor doesn't care, but other apps (and
947 humans) might actually be trusting the fingerprint line.
948 - We used to kill the circuit when we receive a relay command we
949 don't recognize. Now we just drop that cell.
950 - Fix a bug found by Lasse Overlier: when we were making internal
951 circuits (intended to be cannibalized later for rendezvous and
952 introduction circuits), we were picking them so that they had
953 useful exit nodes. There was no need for this, and it actually
954 aids some statistical attacks.
955 - Start treating internal circuits and exit circuits separately.
956 It's important to keep them separate because internal circuits
957 have their last hops picked like middle hops, rather than like
958 exit hops. So exiting on them will break the user's expectations.
959 - Fix a possible way to DoS dirservers.
960 - When the client asked for a rendezvous port that the hidden
961 service didn't want to provide, we were sending an IP address
962 back along with the end cell. Fortunately, it was zero. But stop
965 o Packaging improvements:
966 - Implement --with-libevent-dir option to ./configure. Improve
967 search techniques to find libevent, and use those for openssl too.
968 - Fix a couple of bugs in OpenSSL detection. Deal better when
969 there are multiple SSLs installed with different versions.
970 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
971 - On non-gcc compilers (e.g. Solaris's cc), use "-g -O" instead of
973 - Make unit tests (and other invocations that aren't the real Tor)
974 run without launching listeners, creating subdirectories, and so on.
975 - The OS X installer was adding a symlink for tor_resolve but
976 the binary was called tor-resolve (reported by Thomas Hardly).
977 - Now we can target arch and OS in rpm builds (contributed by
978 Phobos). Also make the resulting dist-rpm filename match the
980 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
981 if you log to syslog and want something other than LOG_DAEMON.
982 - Fix the torify (tsocks) config file to not use Tor for localhost
984 - Start shipping socks-extensions.txt, tor-doc-unix.html,
985 tor-doc-server.html, and stylesheet.css in the tarball.
986 - Stop shipping tor-doc.html, INSTALL, and README in the tarball.
987 They are useless now.
988 - Add Peter Palfrader's contributed check-tor script. It lets you
989 easily check whether a given server (referenced by nickname)
991 - Add BSD-style contributed startup script "rc.subr" from Peter
994 o Directory improvements -- new directory protocol:
995 - See tor/doc/dir-spec.txt for all the juicy details. Key points:
996 - Authorities and caches publish individual descriptors (by
997 digest, by fingerprint, by "all", and by "tell me yours").
998 - Clients don't download or use the old directory anymore. Now they
999 download network-statuses from the directory authorities, and
1000 fetch individual server descriptors as needed from mirrors.
1001 - Clients don't download descriptors of non-running servers.
1002 - Download descriptors by digest, not by fingerprint. Caches try to
1003 download all listed digests from authorities; clients try to
1004 download "best" digests from caches. This avoids partitioning
1005 and isolating attacks better.
1006 - Only upload a new server descriptor when options change, 18
1007 hours have passed, uptime is reset, or bandwidth changes a lot.
1008 - Directory authorities silently throw away new descriptors that
1009 haven't changed much if the timestamps are similar. We do this to
1010 tolerate older Tor servers that upload a new descriptor every 15
1011 minutes. (It seemed like a good idea at the time.)
1012 - Clients choose directory servers from the network status lists,
1013 not from their internal list of router descriptors. Now they can
1014 go to caches directly rather than needing to go to authorities
1015 to bootstrap the first set of descriptors.
1016 - When picking a random directory, prefer non-authorities if any
1018 - Add a new flag to network-status indicating whether the server
1019 can answer v2 directory requests too.
1020 - Directory mirrors now cache up to 16 unrecognized network-status
1021 docs, so new directory authorities will be cached too.
1022 - Stop parsing, storing, or using running-routers output (but
1023 mirrors still cache and serve it).
1024 - Clients consider a threshold of "versioning" directory authorities
1025 before deciding whether to warn the user that he's obsolete.
1026 - Authorities publish separate sorted lists of recommended versions
1027 for clients and for servers.
1028 - Change DirServers config line to note which dirs are v1 authorities.
1029 - Put nicknames on the DirServer line, so we can refer to them
1030 without requiring all our users to memorize their IP addresses.
1031 - Remove option when getting directory cache to see whether they
1032 support running-routers; they all do now. Replace it with one
1033 to see whether caches support v2 stuff.
1034 - Stop listing down or invalid nodes in the v1 directory. This
1035 reduces its bulk by about 1/3, and reduces load on mirrors.
1036 - Mirrors no longer cache the v1 directory as often.
1037 - If we as a directory mirror don't know of any v1 directory
1038 authorities, then don't try to cache any v1 directories.
1040 o Other directory improvements:
1041 - Add lefkada.eecs.harvard.edu and tor.dizum.com as fourth and
1042 fifth authoritative directory servers.
1043 - Directory authorities no longer require an open connection from
1044 a server to consider him "reachable". We need this change because
1045 when we add new directory authorities, old servers won't know not
1047 - Dir authorities now do their own external reachability testing
1048 of each server, and only list as running the ones they found to
1049 be reachable. We also send back warnings to the server's logs if
1050 it uploads a descriptor that we already believe is unreachable.
1051 - Spread the directory authorities' reachability testing over the
1052 entire testing interval, so we don't try to do 500 TLS's at once
1054 - Make the "stable" router flag in network-status be the median of
1055 the uptimes of running valid servers, and make clients pay
1056 attention to the network-status flags. Thus the cutoff adapts
1057 to the stability of the network as a whole, making IRC, IM, etc
1058 connections more reliable.
1059 - Make the v2 dir's "Fast" flag based on relative capacity, just
1060 like "Stable" is based on median uptime. Name everything in the
1061 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
1062 - Retry directory requests if we fail to get an answer we like
1063 from a given dirserver (we were retrying before, but only if
1064 we fail to connect).
1065 - Return a robots.txt on our dirport to discourage google indexing.
1067 o Controller protocol improvements:
1068 - Revised controller protocol (version 1) that uses ascii rather
1069 than binary: tor/doc/control-spec.txt. Add supporting libraries
1070 in python and java and c# so you can use the controller from your
1071 applications without caring how our protocol works.
1072 - Allow the DEBUG controller event to work again. Mark certain log
1073 entries as "don't tell this to controllers", so we avoid cycles.
1074 - New controller function "getinfo accounting", to ask how
1075 many bytes we've used in this time period.
1076 - Add a "resetconf" command so you can set config options like
1077 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
1078 a config option in the torrc with no value, then it clears it
1079 entirely (rather than setting it to its default).
1080 - Add a "getinfo config-file" to tell us where torrc is. Also
1081 expose guard nodes, config options/names.
1082 - Add a "quit" command (when when using the controller manually).
1083 - Add a new signal "newnym" to "change pseudonyms" -- that is, to
1084 stop using any currently-dirty circuits for new streams, so we
1085 don't link new actions to old actions. This also occurs on HUP
1087 - If we would close a stream early (e.g. it asks for a .exit that
1088 we know would refuse it) but the LeaveStreamsUnattached config
1089 option is set by the controller, then don't close it.
1090 - Add a new controller event type "authdir_newdescs" that allows
1091 controllers to get all server descriptors that were uploaded to
1092 a router in its role as directory authority.
1093 - New controller option "getinfo desc/all-recent" to fetch the
1094 latest server descriptor for every router that Tor knows about.
1095 - Fix the controller's "attachstream 0" command to treat conn like
1096 it just connected, doing address remapping, handling .exit and
1097 .onion idioms, and so on. Now we're more uniform in making sure
1098 that the controller hears about new and closing connections.
1099 - Permit transitioning from ORPort==0 to ORPort!=0, and back, from
1100 the controller. Also, rotate dns and cpu workers if the controller
1101 changes options that will affect them; and initialize the dns
1102 worker cache tree whether or not we start out as a server.
1103 - Add a new circuit purpose 'controller' to let the controller ask
1104 for a circuit that Tor won't try to use. Extend the "extendcircuit"
1105 controller command to let you specify the purpose if you're starting
1106 a new circuit. Add a new "setcircuitpurpose" controller command to
1107 let you change a circuit's purpose after it's been created.
1108 - Let the controller ask for "getinfo dir/server/foo" so it can ask
1109 directly rather than connecting to the dir port. "getinfo
1110 dir/status/foo" also works, but currently only if your DirPort
1112 - Let the controller tell us about certain router descriptors
1113 that it doesn't want Tor to use in circuits. Implement
1114 "setrouterpurpose" and modify "+postdescriptor" to do this.
1115 - If the controller's *setconf commands fail, collect an error
1116 message in a string and hand it back to the controller -- don't
1117 just tell them to go read their logs.
1119 o Scalability, resource management, and performance:
1120 - Fix a major load balance bug: we were round-robin reading in 16 KB
1121 chunks, and servers with bandwidthrate of 20 KB, while downloading
1122 a 600 KB directory, would starve their other connections. Now we
1123 try to be a bit more fair.
1124 - Be more conservative about whether to advertise our DirPort.
1125 The main change is to not advertise if we're running at capacity
1126 and either a) we could hibernate ever or b) our capacity is low
1127 and we're using a default DirPort.
1128 - We weren't cannibalizing circuits correctly for
1129 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
1130 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
1131 build those from scratch. This should make hidden services faster.
1132 - Predict required circuits better, with an eye toward making hidden
1133 services faster on the service end.
1134 - Compress exit policies even more: look for duplicate lines and
1136 - Generate 18.0.0.0/8 address policy format in descs when we can;
1137 warn when the mask is not reducible to a bit-prefix.
1138 - There used to be two ways to specify your listening ports in a
1139 server descriptor: on the "router" line and with a separate "ports"
1140 line. Remove support for the "ports" line.
1141 - Reduce memory requirements in our structs by changing the order
1142 of fields. Replace balanced trees with hash tables. Inline
1143 bottleneck smartlist functions. Add a "Map from digest to void*"
1144 abstraction so we can do less hex encoding/decoding, and use it
1145 in router_get_by_digest(). Many other CPU and memory improvements.
1146 - Allow tor_gzip_uncompress to extract as much as possible from
1147 truncated compressed data. Try to extract as many
1148 descriptors as possible from truncated http responses (when
1149 purpose is DIR_PURPOSE_FETCH_ROUTERDESC).
1150 - Make circ->onionskin a pointer, not a static array. moria2 was using
1151 125000 circuit_t's after it had been up for a few weeks, which
1152 translates to 20+ megs of wasted space.
1153 - The private half of our EDH handshake keys are now chosen out
1154 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
1155 - Stop doing the complex voodoo overkill checking for insecure
1156 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
1157 - Do round-robin writes for TLS of at most 16 kB per write. This
1158 might be more fair on loaded Tor servers.
1159 - Do not use unaligned memory access on alpha, mips, or mipsel.
1160 It *works*, but is very slow, so we treat them as if it doesn't.
1162 o Other bugfixes and improvements:
1163 - Start storing useful information to $DATADIR/state, so we can
1164 remember things across invocations of Tor. Retain unrecognized
1165 lines so we can be forward-compatible, and write a TorVersion line
1166 so we can be backward-compatible.
1167 - If ORPort is set, Address is not explicitly set, and our hostname
1168 resolves to a private IP address, try to use an interface address
1169 if it has a public address. Now Windows machines that think of
1170 themselves as localhost can guess their address.
1171 - Regenerate our local descriptor if it's dirty and we try to use
1172 it locally (e.g. if it changes during reachability detection).
1173 This was causing some Tor servers to keep publishing the same
1174 initial descriptor forever.
1175 - Tor servers with dynamic IP addresses were needing to wait 18
1176 hours before they could start doing reachability testing using
1177 the new IP address and ports. This is because they were using
1178 the internal descriptor to learn what to test, yet they were only
1179 rebuilding the descriptor once they decided they were reachable.
1180 - It turns out we couldn't bootstrap a network since we added
1181 reachability detection in 0.1.0.1-rc. Good thing the Tor network
1182 has never gone down. Add an AssumeReachable config option to let
1183 servers and authorities bootstrap. When we're trying to build a
1184 high-uptime or high-bandwidth circuit but there aren't enough
1185 suitable servers, try being less picky rather than simply failing.
1186 - Newly bootstrapped Tor networks couldn't establish hidden service
1187 circuits until they had nodes with high uptime. Be more tolerant.
1188 - Really busy servers were keeping enough circuits open on stable
1189 connections that they were wrapping around the circuit_id
1190 space. (It's only two bytes.) This exposed a bug where we would
1191 feel free to reuse a circuit_id even if it still exists but has
1192 been marked for close. Try to fix this bug. Some bug remains.
1193 - When we fail to bind or listen on an incoming or outgoing
1194 socket, we now close it before refusing, rather than just
1195 leaking it. (Thanks to Peter Palfrader for finding.)
1196 - Fix a file descriptor leak in start_daemon().
1197 - On Windows, you can't always reopen a port right after you've
1198 closed it. So change retry_listeners() to only close and re-open
1199 ports that have changed.
1200 - Workaround a problem with some http proxies that refuse GET
1201 requests that specify "Content-Length: 0". Reported by Adrian.
1202 - Recover better from TCP connections to Tor servers that are
1203 broken but don't tell you (it happens!); and rotate TLS
1204 connections once a week.
1205 - Fix a scary-looking but apparently harmless bug where circuits
1206 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1207 servers, and never switch to state CIRCUIT_STATE_OPEN.
1208 - Check for even more Windows version flags when writing the platform
1209 string in server descriptors, and note any we don't recognize.
1210 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1211 get a better idea of why their circuits failed. Not used yet.
1212 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
1213 We don't use them yet, but maybe one day our DNS resolver will be
1214 able to discover them.
1215 - Let people type "tor --install" as well as "tor -install" when they
1216 want to make it an NT service.
1217 - Looks like we were never delivering deflated (i.e. compressed)
1218 running-routers lists, even when asked. Oops.
1219 - We were leaking some memory every time the client changed IPs.
1220 - Clean up more of the OpenSSL memory when exiting, so we can detect
1221 memory leaks better.
1222 - Never call free() on tor_malloc()d memory. This will help us
1223 use dmalloc to detect memory leaks.
1224 - Some Tor servers process billions of cells per day. These
1225 statistics are now uint64_t's.
1226 - Check [X-]Forwarded-For headers in HTTP requests when generating
1227 log messages. This lets people run dirservers (and caches) behind
1228 Apache but still know which IP addresses are causing warnings.
1229 - Fix minor integer overflow in calculating when we expect to use up
1230 our bandwidth allocation before hibernating.
1231 - Lower the minimum required number of file descriptors to 1000,
1232 so we can have some overhead for Valgrind on Linux, where the
1233 default ulimit -n is 1024.
1234 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
1235 and its existence is confusing some users.
1237 o Config option fixes:
1238 - Add a new config option ExitPolicyRejectPrivate which defaults
1239 to on. Now all exit policies will begin with rejecting private
1240 addresses, unless the server operator explicitly turns it off.
1241 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB.
1242 - Add new ReachableORAddresses and ReachableDirAddresses options
1243 that understand address policies. FascistFirewall is now a synonym
1244 for "ReachableORAddresses *:443", "ReachableDirAddresses *:80".
1245 - Start calling it FooListenAddress rather than FooBindAddress,
1246 since few of our users know what it means to bind an address
1248 - If the user gave Tor an odd number of command-line arguments,
1249 we were silently ignoring the last one. Now we complain and fail.
1250 This wins the oldest-bug prize -- this bug has been present since
1251 November 2002, as released in Tor 0.0.0.
1252 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
1253 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
1254 it would silently ignore the 6668.
1255 - If we get a linelist or linelist_s config option from the torrc,
1256 e.g. ExitPolicy, and it has no value, warn and skip rather than
1257 silently resetting it to its default.
1258 - Setconf was appending items to linelists, not clearing them.
1259 - Add MyFamily to torrc.sample in the server section, so operators
1260 will be more likely to learn that it exists.
1261 - Make ContactInfo mandatory for authoritative directory servers.
1262 - MaxConn has been obsolete for a while now. Document the ConnLimit
1263 config option, which is a *minimum* number of file descriptors
1264 that must be available else Tor refuses to start.
1265 - Get rid of IgnoreVersion undocumented config option, and make us
1266 only warn, never exit, when we're running an obsolete version.
1267 - Make MonthlyAccountingStart config option truly obsolete now.
1268 - Correct the man page entry on TrackHostExitsExpire.
1269 - Let directory authorities start even if they don't specify an
1270 Address config option.
1271 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1272 reflect the updated flags in our v2 dir protocol.
1274 o Config option features:
1275 - Add a new config option FastFirstHopPK (on by default) so clients
1276 do a trivial crypto handshake for their first hop, since TLS has
1277 already taken care of confidentiality and authentication.
1278 - Let the user set ControlListenAddress in the torrc. This can be
1279 dangerous, but there are some cases (like a secured LAN) where it
1281 - New config options to help controllers: FetchServerDescriptors
1282 and FetchHidServDescriptors for whether to fetch server
1283 info and hidserv info or let the controller do it, and
1284 PublishServerDescriptor and PublishHidServDescriptors.
1285 - Also let the controller set the __AllDirActionsPrivate config
1286 option if you want all directory fetches/publishes to happen via
1287 Tor (it assumes your controller bootstraps your circuits).
1288 - Add "HardwareAccel" config option: support for crypto hardware
1289 accelerators via OpenSSL. Off by default, until we find somebody
1290 smart who can test it for us. (It appears to produce seg faults
1291 in at least some cases.)
1292 - New config option "AuthDirRejectUnlisted" for directory authorities
1293 as a panic button: if we get flooded with unusable servers we can
1294 revert to only listing servers in the approved-routers file.
1295 - Directory authorities can now reject/invalidate by key and IP,
1296 with the config options "AuthDirInvalid" and "AuthDirReject", or
1297 by marking a fingerprint as "!reject" or "!invalid" (as its
1298 nickname) in the approved-routers file. This is useful since
1299 currently we automatically list servers as running and usable
1300 even if we know they're jerks.
1301 - Add a new config option TestSocks so people can see whether their
1302 applications are using socks4, socks4a, socks5-with-ip, or
1303 socks5-with-fqdn. This way they don't have to keep mucking
1304 with tcpdump and wondering if something got cached somewhere.
1305 - Add "private:*" as an alias in configuration for policies. Now
1306 you can simplify your exit policy rather than needing to list
1307 every single internal or nonroutable network space.
1308 - Accept "private:*" in routerdesc exit policies; not generated yet
1309 because older Tors do not understand it.
1310 - Add configuration option "V1AuthoritativeDirectory 1" which
1311 moria1, moria2, and tor26 have set.
1312 - Implement an option, VirtualAddrMask, to set which addresses
1313 get handed out in response to mapaddress requests. This works
1314 around a bug in tsocks where 127.0.0.0/8 is never socksified.
1315 - Add a new config option FetchUselessDescriptors, off by default,
1316 for when you plan to run "exitlist" on your client and you want
1317 to know about even the non-running descriptors.
1318 - SocksTimeout: How long do we let a socks connection wait
1319 unattached before we fail it?
1320 - CircuitBuildTimeout: Cull non-open circuits that were born
1321 at least this many seconds ago.
1322 - CircuitIdleTimeout: Cull open clean circuits that were born
1323 at least this many seconds ago.
1324 - New config option SafeSocks to reject all application connections
1325 using unsafe socks protocols. Defaults to off.
1327 o Improved and clearer log messages:
1328 - Reduce clutter in server logs. We're going to try to make
1329 them actually usable now. New config option ProtocolWarnings that
1330 lets you hear about how _other Tors_ are breaking the protocol. Off
1332 - Divide log messages into logging domains. Once we put some sort
1333 of interface on this, it will let people looking at more verbose
1334 log levels specify the topics they want to hear more about.
1335 - Log server fingerprint on startup, so new server operators don't
1336 have to go hunting around their filesystem for it.
1337 - Provide dire warnings to any users who set DirServer manually;
1338 move it out of torrc.sample and into torrc.complete.
1339 - Make the log message less scary when all the dirservers are
1340 temporarily unreachable.
1341 - When tor_socketpair() fails in Windows, give a reasonable
1342 Windows-style errno back.
1343 - Improve tor_gettimeofday() granularity on windows.
1344 - We were printing the number of idle dns workers incorrectly when
1346 - Handle duplicate lines in approved-routers files without warning.
1347 - We were whining about using socks4 or socks5-with-local-lookup
1348 even when it's an IP address in the "virtual" range we designed
1349 exactly for this case.
1350 - Check for named servers when looking them up by nickname;
1351 warn when we're calling a non-named server by its nickname;
1352 don't warn twice about the same name.
1353 - Downgrade the dirserver log messages when whining about
1355 - Correct "your server is reachable" log entries to indicate that
1356 it was self-testing that told us so.
1357 - If we're trying to be a Tor server and running Windows 95/98/ME
1358 as a server, explain that we'll likely crash.
1359 - Provide a more useful warn message when our onion queue gets full:
1360 the CPU is too slow or the exit policy is too liberal.
1361 - Don't warn when we receive a 503 from a dirserver/cache -- this
1362 will pave the way for them being able to refuse if they're busy.
1363 - When we fail to bind a listener, try to provide a more useful
1364 log message: e.g., "Is Tor already running?"
1365 - Only start testing reachability once we've established a
1366 circuit. This will make startup on dir authorities less noisy.
1367 - Don't try to upload hidden service descriptors until we have
1368 established a circuit.
1369 - Tor didn't warn when it failed to open a log file.
1370 - Warn when listening on a public address for socks. We suspect a
1371 lot of people are setting themselves up as open socks proxies,
1372 and they have no idea that jerks on the Internet are using them,
1373 since they simply proxy the traffic into the Tor network.
1374 - Give a useful message when people run Tor as the wrong user,
1375 rather than telling them to start chowning random directories.
1376 - Fix a harmless bug that was causing Tor servers to log
1377 "Got an end because of misc error, but we're not an AP. Closing."
1378 - Fix wrong log message when you add a "HiddenServiceNodes" config
1379 line without any HiddenServiceDir line (reported by Chris Thomas).
1380 - Directory authorities now stop whining so loudly about bad
1381 descriptors that they fetch from other dirservers. So when there's
1382 a log complaint, it's for sure from a freshly uploaded descriptor.
1383 - When logging via syslog, include the pid whenever we provide
1384 a log entry. Suggested by Todd Fries.
1385 - When we're shutting down and we do something like try to post a
1386 server descriptor or rendezvous descriptor, don't complain that
1387 we seem to be unreachable. Of course we are, we're shutting down.
1388 - Change log line for unreachability to explicitly suggest /etc/hosts
1389 as the culprit. Also make it clearer what IP address and ports we're
1390 testing for reachability.
1391 - Put quotes around user-supplied strings when logging so users are
1392 more likely to realize if they add bad characters (like quotes)
1394 - NT service patch from Matt Edman to improve error messages on Win32.
1397 Changes in version 0.1.0.17 - 2006-02-17
1398 o Crash bugfixes on 0.1.0.x:
1399 - When servers with a non-zero DirPort came out of hibernation,
1400 sometimes they would trigger an assert.
1402 o Other important bugfixes:
1403 - On platforms that don't have getrlimit (like Windows), we were
1404 artificially constraining ourselves to a max of 1024
1405 connections. Now just assume that we can handle as many as 15000
1406 connections. Hopefully this won't cause other problems.
1408 o Backported features:
1409 - When we're a server, a client asks for an old-style directory,
1410 and our write bucket is empty, don't give it to him. This way
1411 small servers can continue to serve the directory *sometimes*,
1412 without getting overloaded.
1413 - Whenever you get a 503 in response to a directory fetch, try
1414 once more. This will become important once servers start sending
1415 503's whenever they feel busy.
1416 - Fetch a new directory every 120 minutes, not every 40 minutes.
1417 Now that we have hundreds of thousands of users running the old
1418 directory algorithm, it's starting to hurt a lot.
1419 - Bump up the period for forcing a hidden service descriptor upload
1420 from 20 minutes to 1 hour.
1423 Changes in version 0.1.0.16 - 2006-01-02
1424 o Crash bugfixes on 0.1.0.x:
1425 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1426 corrupting the heap, losing FDs, or crashing when we need to resize
1427 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1428 - It turns out sparc64 platforms crash on unaligned memory access
1429 too -- so detect and avoid this.
1430 - Handle truncated compressed data correctly (by detecting it and
1432 - Fix possible-but-unlikely free(NULL) in control.c.
1433 - When we were closing connections, there was a rare case that
1434 stomped on memory, triggering seg faults and asserts.
1435 - Avoid potential infinite recursion when building a descriptor. (We
1436 don't know that it ever happened, but better to fix it anyway.)
1437 - We were neglecting to unlink marked circuits from soon-to-close OR
1438 connections, which caused some rare scribbling on freed memory.
1439 - Fix a memory stomping race bug when closing the joining point of two
1440 rendezvous circuits.
1441 - Fix an assert in time parsing found by Steven Murdoch.
1443 o Other bugfixes on 0.1.0.x:
1444 - When we're doing reachability testing, provide more useful log
1445 messages so the operator knows what to expect.
1446 - Do not check whether DirPort is reachable when we are suppressing
1447 advertising it because of hibernation.
1448 - When building with -static or on Solaris, we sometimes needed -ldl.
1449 - One of the dirservers (tor26) changed its IP address.
1450 - When we're deciding whether a stream has enough circuits around
1451 that can handle it, count the freshly dirty ones and not the ones
1452 that are so dirty they won't be able to handle it.
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 - Give a more helpful log message when you try to change ORPort via
1456 the controller: you should upgrade Tor if you want that to work.
1457 - We were failing to parse Tor versions that start with "Tor ".
1458 - Tolerate faulty streams better: when a stream fails for reason
1459 exitpolicy, stop assuming that the router is lying about his exit
1460 policy. When a stream fails for reason misc, allow it to retry just
1461 as if it was resolvefailed. When a stream has failed three times,
1462 reset its failure count so we can try again and get all three tries.
1465 Changes in version 0.1.0.15 - 2005-09-23
1466 o Bugfixes on 0.1.0.x:
1467 - Reject ports 465 and 587 (spam targets) in default exit policy.
1468 - Don't crash when we don't have any spare file descriptors and we
1469 try to spawn a dns or cpu worker.
1470 - Get rid of IgnoreVersion undocumented config option, and make us
1471 only warn, never exit, when we're running an obsolete version.
1472 - Don't try to print a null string when your server finds itself to
1473 be unreachable and the Address config option is empty.
1474 - Make the numbers in read-history and write-history into uint64s,
1475 so they don't overflow and publish negatives in the descriptor.
1476 - Fix a minor memory leak in smartlist_string_remove().
1477 - We were only allowing ourselves to upload a server descriptor at
1478 most every 20 minutes, even if it changed earlier than that.
1479 - Clean up log entries that pointed to old URLs.
1482 Changes in version 0.1.0.14 - 2005-08-08
1483 o Bugfixes on 0.1.0.x:
1484 - Fix the other half of the bug with crypto handshakes
1486 - Fix an assert trigger if you send a 'signal term' via the
1487 controller when it's listening for 'event info' messages.
1490 Changes in version 0.1.0.13 - 2005-08-04
1491 o Bugfixes on 0.1.0.x:
1492 - Fix a critical bug in the security of our crypto handshakes.
1493 - Fix a size_t underflow in smartlist_join_strings2() that made
1494 it do bad things when you hand it an empty smartlist.
1495 - Fix Windows installer to ship Tor license (thanks to Aphex for
1496 pointing out this oversight) and put a link to the doc directory
1498 - Explicitly set no-unaligned-access for sparc: it turns out the
1499 new gcc's let you compile broken code, but that doesn't make it
1503 Changes in version 0.1.0.12 - 2005-07-18
1504 o New directory servers:
1505 - tor26 has changed IP address.
1507 o Bugfixes on 0.1.0.x:
1508 - Fix a possible double-free in tor_gzip_uncompress().
1509 - When --disable-threads is set, do not search for or link against
1511 - Don't trigger an assert if an authoritative directory server
1512 claims its dirport is 0.
1513 - Fix bug with removing Tor as an NT service: some people were
1514 getting "The service did not return an error." Thanks to Matt
1518 Changes in version 0.1.0.11 - 2005-06-30
1519 o Bugfixes on 0.1.0.x:
1520 - Fix major security bug: servers were disregarding their
1521 exit policies if clients behaved unexpectedly.
1522 - Make OS X init script check for missing argument, so we don't
1523 confuse users who invoke it incorrectly.
1524 - Fix a seg fault in "tor --hash-password foo".
1525 - The MAPADDRESS control command was broken.
1528 Changes in version 0.1.0.10 - 2005-06-14
1530 - Make NT services work and start on startup on Win32 (based on
1531 patch by Matt Edman). See the FAQ entry for details.
1532 - Make 'platform' string in descriptor more accurate for Win32
1533 servers, so it's not just "unknown platform".
1534 - REUSEADDR on normal platforms means you can rebind to the port
1535 right after somebody else has let it go. But REUSEADDR on Win32
1536 means you can bind to the port _even when somebody else already
1537 has it bound_! So, don't do that on Win32.
1538 - Clean up the log messages when starting on Win32 with no config
1540 - Allow seeding the RNG on Win32 even when you're not running as
1541 Administrator. If seeding the RNG on Win32 fails, quit.
1543 o Assert / crash bugs:
1544 - Refuse relay cells that claim to have a length larger than the
1545 maximum allowed. This prevents a potential attack that could read
1546 arbitrary memory (e.g. keys) from an exit server's process
1548 - If unofficial Tor clients connect and send weird TLS certs, our
1549 Tor server triggers an assert. Stop asserting, and start handling
1550 TLS errors better in other situations too.
1551 - Fix a race condition that can trigger an assert when we have a
1552 pending create cell and an OR connection attempt fails.
1555 - Use pthreads for worker processes rather than forking. This was
1556 forced because when we forked, we ended up wasting a lot of
1557 duplicate ram over time.
1558 - Also switch to foo_r versions of some library calls to allow
1559 reentry and threadsafeness.
1560 - Implement --disable-threads configure option. Disable threads on
1561 netbsd and openbsd by default, because they have no reentrant
1562 resolver functions (!), and on solaris since it has other
1564 - Fix possible bug on threading platforms (e.g. win32) which was
1565 leaking a file descriptor whenever a cpuworker or dnsworker died.
1566 - Fix a minor memory leak when somebody establishes an introduction
1567 point at your Tor server.
1568 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1570 - Add ./configure --with-dmalloc option, to track memory leaks.
1571 - And try to free all memory on closing, so we can detect what
1574 o Protocol correctness:
1575 - When we've connected to an OR and handshaked but didn't like
1576 the result, we were closing the conn without sending destroy
1577 cells back for pending circuits. Now send those destroys.
1578 - Start sending 'truncated' cells back rather than destroy cells
1579 if the circuit closes in front of you. This means we won't have
1580 to abandon partially built circuits.
1581 - Handle changed router status correctly when dirserver reloads
1582 fingerprint file. We used to be dropping all unverified descriptors
1583 right then. The bug was hidden because we would immediately
1584 fetch a directory from another dirserver, which would include the
1585 descriptors we just dropped.
1586 - Revise tor-spec to add more/better stream end reasons.
1587 - Revise all calls to connection_edge_end to avoid sending 'misc',
1588 and to take errno into account where possible.
1589 - Client now retries when streams end early for 'hibernating' or
1590 'resource limit' reasons, rather than failing them.
1591 - Try to be more zealous about calling connection_edge_end when
1592 things go bad with edge conns in connection.c.
1594 o Robustness improvements:
1595 - Better handling for heterogeneous / unreliable nodes:
1596 - Annotate circuits with whether they aim to contain high uptime
1597 nodes and/or high capacity nodes. When building circuits, choose
1599 - This means that every single node in an intro rend circuit,
1600 not just the last one, will have a minimum uptime.
1601 - New config option LongLivedPorts to indicate application streams
1602 that will want high uptime circuits.
1603 - Servers reset uptime when a dir fetch entirely fails. This
1604 hopefully reflects stability of the server's network connectivity.
1605 - If somebody starts his tor server in Jan 2004 and then fixes his
1606 clock, don't make his published uptime be a year.
1607 - Reset published uptime when we wake up from hibernation.
1608 - Introduce a notion of 'internal' circs, which are chosen without
1609 regard to the exit policy of the last hop. Intro and rendezvous
1610 circs must be internal circs, to avoid leaking information. Resolve
1611 and connect streams can use internal circs if they want.
1612 - New circuit pooling algorithm: keep track of what destination ports
1613 we've used recently (start out assuming we'll want to use 80), and
1614 make sure to have enough circs around to satisfy these ports. Also
1615 make sure to have 2 internal circs around if we've required internal
1616 circs lately (and with high uptime if we've seen that lately too).
1617 - Turn addr_policy_compare from a tristate to a quadstate; this should
1618 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1619 for google.com" problem.
1620 - When a client asks us for a dir mirror and we don't have one,
1621 launch an attempt to get a fresh one.
1622 - First cut at support for "create-fast" cells. Clients can use
1623 these when extending to their first hop, since the TLS already
1624 provides forward secrecy and authentication. Not enabled on
1627 o Reachability testing.
1628 - Your Tor server will automatically try to see if its ORPort and
1629 DirPort are reachable from the outside, and it won't upload its
1630 descriptor until it decides at least ORPort is reachable (when
1631 DirPort is not yet found reachable, publish it as zero).
1632 - When building testing circs for ORPort testing, use only
1633 high-bandwidth nodes, so fewer circuits fail.
1634 - Notice when our IP changes, and reset stats/uptime/reachability.
1635 - Authdirservers don't do ORPort reachability detection, since
1636 they're in clique mode, so it will be rare to find a server not
1637 already connected to them.
1638 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1642 - Now we allow two unverified servers with the same nickname
1643 but different keys. But if a nickname is verified, only that
1644 nickname+key are allowed.
1645 - If you're an authdirserver connecting to an address:port,
1646 and it's not the OR you were expecting, forget about that
1647 descriptor. If he *was* the one you were expecting, then forget
1648 about all other descriptors for that address:port.
1649 - Allow servers to publish descriptors from 12 hours in the future.
1650 Corollary: only whine about clock skew from the dirserver if
1651 he's a trusted dirserver (since now even verified servers could
1652 have quite wrong clocks).
1653 - Require servers that use the default dirservers to have public IP
1654 addresses. We have too many servers that are configured with private
1655 IPs and their admins never notice the log entries complaining that
1656 their descriptors are being rejected.
1658 o Efficiency improvements:
1659 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1660 and /dev/poll), and hopefully work better on Windows too.
1661 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1662 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1663 - Find libevent even if it's hiding in /usr/local/ and your
1664 CFLAGS and LDFLAGS don't tell you to look there.
1665 - Be able to link with libevent as a shared library (the default
1666 after 1.0d), even if it's hiding in /usr/local/lib and even
1667 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1668 assuming you're running gcc. Otherwise fail and give a useful
1670 - Switch to a new buffer management algorithm, which tries to avoid
1671 reallocing and copying quite as much. In first tests it looks like
1672 it uses *more* memory on average, but less cpu.
1673 - Switch our internal buffers implementation to use a ring buffer,
1674 to hopefully improve performance for fast servers a lot.
1675 - Reenable the part of the code that tries to flush as soon as an
1676 OR outbuf has a full TLS record available. Perhaps this will make
1677 OR outbufs not grow as huge except in rare cases, thus saving lots
1678 of CPU time plus memory.
1679 - Improve performance for dirservers: stop re-parsing the whole
1680 directory every time you regenerate it.
1681 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1682 it much faster to look up a circuit for each relay cell.
1683 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1684 since they're eating our cpu on exit nodes.
1685 - Stop wasting time doing a case insensitive comparison for every
1686 dns name every time we do any lookup. Canonicalize the names to
1687 lowercase when you first see them.
1690 - Handle unavailable hidden services better. Handle slow or busy
1691 hidden services better.
1692 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1693 circ as necessary, if there are any completed ones lying around
1694 when we try to launch one.
1695 - Make hidden services try to establish a rendezvous for 30 seconds
1696 after fetching the descriptor, rather than for n (where n=3)
1697 attempts to build a circuit.
1698 - Adjust maximum skew and age for rendezvous descriptors: let skew
1699 be 48 hours rather than 90 minutes.
1700 - Reject malformed .onion addresses rather then passing them on as
1701 normal web requests.
1704 - More Tor controller support. See
1705 http://tor.eff.org/doc/control-spec.txt for all the new features,
1706 including signals to emulate unix signals from any platform;
1707 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1708 closestream; closecircuit; etc.
1709 - Encode hashed controller passwords in hex instead of base64,
1710 to make it easier to write controllers.
1711 - Revise control spec and implementation to allow all log messages to
1712 be sent to controller with their severities intact (suggested by
1713 Matt Edman). Disable debug-level logs while delivering a debug-level
1714 log to the controller, to prevent loop. Update TorControl to handle
1715 new log event types.
1717 o New config options/defaults:
1718 - Begin scrubbing sensitive strings from logs by default. Turn off
1719 the config option SafeLogging if you need to do debugging.
1720 - New exit policy: accept most low-numbered ports, rather than
1721 rejecting most low-numbered ports.
1722 - Put a note in the torrc about abuse potential with the default
1724 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1726 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1727 based on patch from Adam Langley (basic auth only).
1728 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1729 the fast servers that have been joining lately. (Clients are now
1730 willing to load balance over up to 2 MB of advertised bandwidth
1732 - New config option MaxAdvertisedBandwidth which lets you advertise
1733 a low bandwidthrate (to not attract as many circuits) while still
1734 allowing a higher bandwidthrate in reality.
1735 - Require BandwidthRate to be at least 20kB/s for servers.
1736 - Add a NoPublish config option, so you can be a server (e.g. for
1737 testing running Tor servers in other Tor networks) without
1738 publishing your descriptor to the primary dirservers.
1739 - Add a new AddressMap config directive to rewrite incoming socks
1740 addresses. This lets you, for example, declare an implicit
1741 required exit node for certain sites.
1742 - Add a new TrackHostExits config directive to trigger addressmaps
1743 for certain incoming socks addresses -- for sites that break when
1744 your exit keeps changing (based on patch from Mike Perry).
1745 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1746 which describes how often we retry making new circuits if current
1747 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1748 how long we're willing to make use of an already-dirty circuit.
1749 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1750 a config option "ShutdownWaitLength" (when using kill -INT on
1752 - Fix an edge case in parsing config options: if they say "--"
1753 on the commandline, it's not a config option (thanks weasel).
1754 - New config option DirAllowPrivateAddresses for authdirservers.
1755 Now by default they refuse router descriptors that have non-IP or
1756 private-IP addresses.
1757 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1758 smart" default value: low for servers and high for clients.
1759 - Some people were putting "Address " in their torrc, and they had
1760 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1761 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1762 LOCALSTATEDIR/tor instead.
1763 - Implement --verify-config command-line option to check if your torrc
1764 is valid without actually launching Tor.
1766 o Logging improvements:
1767 - When dirservers refuse a server descriptor, we now log its
1768 contactinfo, platform, and the poster's IP address.
1769 - Only warn once per nickname from add_nickname_list_to_smartlist()
1770 per failure, so an entrynode or exitnode choice that's down won't
1772 - When we're connecting to an OR and he's got a different nickname/key
1773 than we were expecting, only complain loudly if we're an OP or a
1774 dirserver. Complaining loudly to the OR admins just confuses them.
1775 - Whine at you if you're a server and you don't set your contactinfo.
1776 - Warn when exit policy implicitly allows local addresses.
1777 - Give a better warning when some other server advertises an
1778 ORPort that is actually an apache running ssl.
1779 - If we get an incredibly skewed timestamp from a dirserver mirror
1780 that isn't a verified OR, don't warn -- it's probably him that's
1782 - When a dirserver causes you to give a warn, mention which dirserver
1784 - Initialize libevent later in the startup process, so the logs are
1785 already established by the time we start logging libevent warns.
1786 - Use correct errno on win32 if libevent fails.
1787 - Check and warn about known-bad/slow libevent versions.
1788 - Stop warning about sigpipes in the logs. We're going to
1789 pretend that getting these occassionally is normal and fine.
1791 o New contrib scripts:
1792 - New experimental script tor/contrib/exitlist: a simple python
1793 script to parse directories and find Tor nodes that exit to listed
1795 - New experimental script tor/contrib/ExerciseServer.py (needs more
1796 work) that uses the controller interface to build circuits and
1797 fetch pages over them. This will help us bootstrap servers that
1798 have lots of capacity but haven't noticed it yet.
1799 - New experimental script tor/contrib/PathDemo.py (needs more work)
1800 that uses the controller interface to let you choose whole paths
1802 "<hostname>.<path,separated by dots>.<length of path>.path"
1803 - New contributed script "privoxy-tor-toggle" to toggle whether
1804 Privoxy uses Tor. Seems to be configured for Debian by default.
1805 - Have torctl.in/tor.sh.in check for location of su binary (needed
1809 - chdir() to your datadirectory at the *end* of the daemonize process,
1810 not the beginning. This was a problem because the first time you
1811 run tor, if your datadir isn't there, and you have runasdaemon set
1812 to 1, it will try to chdir to it before it tries to create it. Oops.
1813 - Fix several double-mark-for-close bugs, e.g. where we were finding
1814 a conn for a cell even if that conn is already marked for close.
1815 - Stop most cases of hanging up on a socks connection without sending
1817 - Fix a bug in the RPM package: set home directory for _tor to
1818 something more reasonable when first installing.
1819 - Stop putting nodename in the Platform string in server descriptors.
1820 It doesn't actually help, and it is confusing/upsetting some people.
1821 - When using preferred entry or exit nodes, ignore whether the
1822 circuit wants uptime or capacity. They asked for the nodes, they
1824 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1825 artificially capped at 500kB.
1826 - Cache local dns resolves correctly even when they're .exit
1828 - If we're hibernating and we get a SIGINT, exit immediately.
1829 - tor-resolve requests were ignoring .exit if there was a working circuit
1830 they could use instead.
1831 - Pay more attention to the ClientOnly config option.
1832 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1833 installer screens; and don't put stuff into StartupItems unless
1834 the user asks you to.
1837 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1838 rather than just rejecting it.
1839 - If our clock jumps forward by 100 seconds or more, assume something
1840 has gone wrong with our network and abandon all not-yet-used circs.
1841 - When an application is using socks5, give him the whole variety of
1842 potential socks5 responses (connect refused, host unreachable, etc),
1843 rather than just "success" or "failure".
1844 - A more sane version numbering system. See
1845 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1846 - Change version parsing logic: a version is "obsolete" if it is not
1847 recommended and (1) there is a newer recommended version in the
1848 same series, or (2) there are no recommended versions in the same
1849 series, but there are some recommended versions in a newer series.
1850 A version is "new" if it is newer than any recommended version in
1852 - Report HTTP reasons to client when getting a response from directory
1853 servers -- so you can actually know what went wrong.
1854 - Reject odd-looking addresses at the client (e.g. addresses that
1855 contain a colon), rather than having the server drop them because
1857 - Stop publishing socksport in the directory, since it's not
1858 actually meant to be public. For compatibility, publish a 0 there
1860 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1861 cookies to disk and doesn't log each web request to disk. (Thanks
1862 to Brett Carrington for pointing this out.)
1863 - Add OSX uninstall instructions. An actual uninstall script will
1865 - Add "opt hibernating 1" to server descriptor to make it clearer
1866 whether the server is hibernating.
1869 Changes in version 0.0.9.10 - 2005-06-16
1870 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1871 - Refuse relay cells that claim to have a length larger than the
1872 maximum allowed. This prevents a potential attack that could read
1873 arbitrary memory (e.g. keys) from an exit server's process
1877 Changes in version 0.0.9.9 - 2005-04-23
1878 o Bugfixes on 0.0.9.x:
1879 - If unofficial Tor clients connect and send weird TLS certs, our
1880 Tor server triggers an assert. This release contains a minimal
1881 backport from the broader fix that we put into 0.1.0.4-rc.
1884 Changes in version 0.0.9.8 - 2005-04-07
1885 o Bugfixes on 0.0.9.x:
1886 - We have a bug that I haven't found yet. Sometimes, very rarely,
1887 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1888 thinks of itself as idle. This meant that no new circuits ever got
1889 established. Here's a workaround to kill any cpuworker that's been
1890 busy for more than 100 seconds.
1893 Changes in version 0.0.9.7 - 2005-04-01
1894 o Bugfixes on 0.0.9.x:
1895 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1896 - Compare identity to identity, not to nickname, when extending to
1897 a router not already in the directory. This was preventing us from
1898 extending to unknown routers. Oops.
1899 - Make sure to create OS X Tor user in <500 range, so we aren't
1900 creating actual system users.
1901 - Note where connection-that-hasn't-sent-end was marked, and fix
1902 a few really loud instances of this harmless bug (it's fixed more
1906 Changes in version 0.0.9.6 - 2005-03-24
1907 o Bugfixes on 0.0.9.x (crashes and asserts):
1908 - Add new end stream reasons to maintainance branch. Fix bug where
1909 reason (8) could trigger an assert. Prevent bug from recurring.
1910 - Apparently win32 stat wants paths to not end with a slash.
1911 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1912 blowing away the circuit that conn->cpath_layer points to, then
1913 checking to see if the circ is well-formed. Backport check to make
1914 sure we dont use the cpath on a closed connection.
1915 - Prevent circuit_resume_edge_reading_helper() from trying to package
1916 inbufs for marked-for-close streams.
1917 - Don't crash on hup if your options->address has become unresolvable.
1918 - Some systems (like OS X) sometimes accept() a connection and tell
1919 you the remote host is 0.0.0.0:0. If this happens, due to some
1920 other mis-features, we get confused; so refuse the conn for now.
1922 o Bugfixes on 0.0.9.x (other):
1923 - Fix harmless but scary "Unrecognized content encoding" warn message.
1924 - Add new stream error reason: TORPROTOCOL reason means "you are not
1925 speaking a version of Tor I understand; say bye-bye to your stream."
1926 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1927 into the future, now that we are more tolerant of skew. This
1928 resolves a bug where a Tor server would refuse to cache a directory
1929 because all the directories it gets are too far in the future;
1930 yet the Tor server never logs any complaints about clock skew.
1931 - Mac packaging magic: make man pages useable, and do not overwrite
1932 existing torrc files.
1933 - Make OS X log happily to /var/log/tor/tor.log
1936 Changes in version 0.0.9.5 - 2005-02-22
1937 o Bugfixes on 0.0.9.x:
1938 - Fix an assert race at exit nodes when resolve requests fail.
1939 - Stop picking unverified dir mirrors--it only leads to misery.
1940 - Patch from Matt Edman to make NT services work better. Service
1941 support is still not compiled into the executable by default.
1942 - Patch from Dmitri Bely so the Tor service runs better under
1943 the win32 SYSTEM account.
1944 - Make tor-resolve actually work (?) on Win32.
1945 - Fix a sign bug when getrlimit claims to have 4+ billion
1946 file descriptors available.
1947 - Stop refusing to start when bandwidthburst == bandwidthrate.
1948 - When create cells have been on the onion queue more than five
1949 seconds, just send back a destroy and take them off the list.
1952 Changes in version 0.0.9.4 - 2005-02-03
1953 o Bugfixes on 0.0.9:
1954 - Fix an assert bug that took down most of our servers: when
1955 a server claims to have 1 GB of bandwidthburst, don't
1957 - Don't crash as badly if we have spawned the max allowed number
1958 of dnsworkers, or we're out of file descriptors.
1959 - Block more file-sharing ports in the default exit policy.
1960 - MaxConn is now automatically set to the hard limit of max
1961 file descriptors we're allowed (ulimit -n), minus a few for
1963 - Give a clearer message when servers need to raise their
1964 ulimit -n when they start running out of file descriptors.
1965 - SGI Compatibility patches from Jan Schaumann.
1966 - Tolerate a corrupt cached directory better.
1967 - When a dirserver hasn't approved your server, list which one.
1968 - Go into soft hibernation after 95% of the bandwidth is used,
1969 not 99%. This is especially important for daily hibernators who
1970 have a small accounting max. Hopefully it will result in fewer
1971 cut connections when the hard hibernation starts.
1972 - Load-balance better when using servers that claim more than
1973 800kB/s of capacity.
1974 - Make NT services work (experimental, only used if compiled in).
1977 Changes in version 0.0.9.3 - 2005-01-21
1978 o Bugfixes on 0.0.9:
1979 - Backport the cpu use fixes from main branch, so busy servers won't
1980 need as much processor time.
1981 - Work better when we go offline and then come back, or when we
1982 run Tor at boot before the network is up. We do this by
1983 optimistically trying to fetch a new directory whenever an
1984 application request comes in and we think we're offline -- the
1985 human is hopefully a good measure of when the network is back.
1986 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1987 long as you keep using them; actually publish hidserv descriptors
1988 shortly after they change, rather than waiting 20-40 minutes.
1989 - Enable Mac startup script by default.
1990 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1991 - When you update AllowUnverifiedNodes or FirewallPorts via the
1992 controller's setconf feature, we were always appending, never
1994 - When you update HiddenServiceDir via setconf, it was screwing up
1995 the order of reading the lines, making it fail.
1996 - Do not rewrite a cached directory back to the cache; otherwise we
1997 will think it is recent and not fetch a newer one on startup.
1998 - Workaround for webservers that lie about Content-Encoding: Tor
1999 now tries to autodetect compressed directories and compression
2000 itself. This lets us Proxypass dir fetches through apache.
2003 Changes in version 0.0.9.2 - 2005-01-04
2004 o Bugfixes on 0.0.9 (crashes and asserts):
2005 - Fix an assert on startup when the disk is full and you're logging
2007 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
2008 style address, then we'd crash.
2009 - Fix an assert trigger when the running-routers string we get from
2010 a dirserver is broken.
2011 - Make worker threads start and run on win32. Now win32 servers
2013 - Bandaid (not actually fix, but now it doesn't crash) an assert
2014 where the dns worker dies mysteriously and the main Tor process
2015 doesn't remember anything about the address it was resolving.
2017 o Bugfixes on 0.0.9 (Win32):
2018 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
2019 name out of the warning/assert messages.
2020 - Fix a superficial "unhandled error on read" bug on win32.
2021 - The win32 installer no longer requires a click-through for our
2022 license, since our Free Software license grants rights but does not
2024 - Win32: When connecting to a dirserver fails, try another one
2025 immediately. (This was already working for non-win32 Tors.)
2026 - Stop trying to parse $HOME on win32 when hunting for default
2028 - Make tor-resolve.c work on win32 by calling network_init().
2030 o Bugfixes on 0.0.9 (other):
2031 - Make 0.0.9.x build on Solaris again.
2032 - Due to a fencepost error, we were blowing away the \n when reporting
2033 confvalue items in the controller. So asking for multiple config
2034 values at once couldn't work.
2035 - When listing circuits that are pending on an opening OR connection,
2036 if we're an OR we were listing circuits that *end* at us as
2037 being pending on every listener, dns/cpu worker, etc. Stop that.
2038 - Dirservers were failing to create 'running-routers' or 'directory'
2039 strings if we had more than some threshold of routers. Fix them so
2040 they can handle any number of routers.
2041 - Fix a superficial "Duplicate mark for close" bug.
2042 - Stop checking for clock skew for OR connections, even for servers.
2043 - Fix a fencepost error that was chopping off the last letter of any
2044 nickname that is the maximum allowed nickname length.
2045 - Update URLs in log messages so they point to the new website.
2046 - Fix a potential problem in mangling server private keys while
2047 writing to disk (not triggered yet, as far as we know).
2048 - Include the licenses for other free software we include in Tor,
2049 now that we're shipping binary distributions more regularly.
2052 Changes in version 0.0.9.1 - 2004-12-15
2053 o Bugfixes on 0.0.9:
2054 - Make hibernation actually work.
2055 - Make HashedControlPassword config option work.
2056 - When we're reporting event circuit status to a controller,
2057 don't use the stream status code.
2060 Changes in version 0.0.9 - 2004-12-12
2061 o Bugfixes on 0.0.8.1 (Crashes and asserts):
2062 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
2063 write() call will fail and we handle it there.
2064 - When we run out of disk space, or other log writing error, don't
2065 crash. Just stop logging to that log and continue.
2066 - Fix isspace() and friends so they still make Solaris happy
2067 but also so they don't trigger asserts on win32.
2068 - Fix assert failure on malformed socks4a requests.
2069 - Fix an assert bug where a hidden service provider would fail if
2070 the first hop of his rendezvous circuit was down.
2071 - Better handling of size_t vs int, so we're more robust on 64
2074 o Bugfixes on 0.0.8.1 (Win32):
2075 - Make windows sockets actually non-blocking (oops), and handle
2076 win32 socket errors better.
2077 - Fix parse_iso_time on platforms without strptime (eg win32).
2078 - win32: when being multithreaded, leave parent fdarray open.
2079 - Better handling of winsock includes on non-MSV win32 compilers.
2080 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
2082 - Make unit tests work on win32.
2084 o Bugfixes on 0.0.8.1 (Path selection and streams):
2085 - Calculate timeout for waiting for a connected cell from the time
2086 we sent the begin cell, not from the time the stream started. If
2087 it took a long time to establish the circuit, we would time out
2088 right after sending the begin cell.
2089 - Fix router_compare_addr_to_addr_policy: it was not treating a port
2090 of * as always matching, so we were picking reject *:* nodes as
2091 exit nodes too. Oops.
2092 - When read() failed on a stream, we would close it without sending
2093 back an end. So 'connection refused' would simply be ignored and
2094 the user would get no response.
2095 - Stop a sigpipe: when an 'end' cell races with eof from the app,
2096 we shouldn't hold-open-until-flush if the eof arrived first.
2097 - Let resolve conns retry/expire also, rather than sticking around
2099 - Fix more dns related bugs: send back resolve_failed and end cells
2100 more reliably when the resolve fails, rather than closing the
2101 circuit and then trying to send the cell. Also attach dummy resolve
2102 connections to a circuit *before* calling dns_resolve(), to fix
2103 a bug where cached answers would never be sent in RESOLVED cells.
2105 o Bugfixes on 0.0.8.1 (Circuits):
2106 - Finally fix a bug that's been plaguing us for a year:
2107 With high load, circuit package window was reaching 0. Whenever
2108 we got a circuit-level sendme, we were reading a lot on each
2109 socket, but only writing out a bit. So we would eventually reach
2110 eof. This would be noticed and acted on even when there were still
2111 bytes sitting in the inbuf.
2112 - Use identity comparison, not nickname comparison, to choose which
2113 half of circuit-ID-space each side gets to use. This is needed
2114 because sometimes we think of a router as a nickname, and sometimes
2115 as a hex ID, and we can't predict what the other side will do.
2117 o Bugfixes on 0.0.8.1 (Other):
2118 - Fix a whole slew of memory leaks.
2119 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
2120 - If we are using select, make sure we stay within FD_SETSIZE.
2121 - When poll() is interrupted, we shouldn't believe the revents values.
2122 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
2123 and smartlist_len, which are two major profiling offenders.
2124 - If do_hup fails, actually notice.
2125 - Flush the log file descriptor after we print "Tor opening log file",
2126 so we don't see those messages days later.
2127 - Hidden service operators now correctly handle version 1 style
2128 INTRODUCE1 cells (nobody generates them still, so not a critical
2130 - Handle more errnos from accept() without closing the listener.
2131 Some OpenBSD machines were closing their listeners because
2132 they ran out of file descriptors.
2133 - Some people had wrapped their tor client/server in a script
2134 that would restart it whenever it died. This did not play well
2135 with our "shut down if your version is obsolete" code. Now people
2136 don't fetch a new directory if their local cached version is
2138 - Make our autogen.sh work on ksh as well as bash.
2139 - Better torrc example lines for dirbindaddress and orbindaddress.
2140 - Improved bounds checking on parsed ints (e.g. config options and
2141 the ones we find in directories.)
2142 - Stop using separate defaults for no-config-file and
2143 empty-config-file. Now you have to explicitly turn off SocksPort,
2144 if you don't want it open.
2145 - We were starting to daemonize before we opened our logs, so if
2146 there were any problems opening logs, we would complain to stderr,
2147 which wouldn't work, and then mysteriously exit.
2148 - If a verified OR connects to us before he's uploaded his descriptor,
2149 or we verify him and hup but he still has the original TLS
2150 connection, then conn->nickname is still set like he's unverified.
2152 o Code security improvements, inspired by Ilja:
2153 - tor_snprintf wrapper over snprintf with consistent (though not C99)
2155 - Replace sprintf with tor_snprintf. (I think they were all safe, but
2157 - Replace strcpy/strncpy with strlcpy in more places.
2158 - Avoid strcat; use tor_snprintf or strlcat instead.
2160 o Features (circuits and streams):
2161 - New circuit building strategy: keep a list of ports that we've
2162 used in the past 6 hours, and always try to have 2 circuits open
2163 or on the way that will handle each such port. Seed us with port
2164 80 so web users won't complain that Tor is "slow to start up".
2165 - Make kill -USR1 dump more useful stats about circuits.
2166 - When warning about retrying or giving up, print the address, so
2167 the user knows which one it's talking about.
2168 - If you haven't used a clean circuit in an hour, throw it away,
2169 just to be on the safe side. (This means after 6 hours a totally
2170 unused Tor client will have no circuits open.)
2171 - Support "foo.nickname.exit" addresses, to let Alice request the
2172 address "foo" as viewed by exit node "nickname". Based on a patch
2174 - If your requested entry or exit node has advertised bandwidth 0,
2176 - Be more greedy about filling up relay cells -- we try reading again
2177 once we've processed the stuff we read, in case enough has arrived
2178 to fill the last cell completely.
2179 - Refuse application socks connections to port 0.
2180 - Use only 0.0.9pre1 and later servers for resolve cells.
2182 o Features (bandwidth):
2183 - Hibernation: New config option "AccountingMax" lets you
2184 set how many bytes per month (in each direction) you want to
2185 allow your server to consume. Rather than spreading those
2186 bytes out evenly over the month, we instead hibernate for some
2187 of the month and pop up at a deterministic time, work until
2188 the bytes are consumed, then hibernate again. Config option
2189 "MonthlyAccountingStart" lets you specify which day of the month
2190 your billing cycle starts on.
2191 - Implement weekly/monthly/daily accounting: now you specify your
2192 hibernation properties by
2193 AccountingMax N bytes|KB|MB|GB|TB
2194 AccountingStart day|week|month [day] HH:MM
2195 Defaults to "month 1 0:00".
2196 - Let bandwidth and interval config options be specified as 5 bytes,
2197 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
2199 o Features (directories):
2200 - New "router-status" line in directory, to better bind each verified
2201 nickname to its identity key.
2202 - Clients can ask dirservers for /dir.z to get a compressed version
2203 of the directory. Only works for servers running 0.0.9, of course.
2204 - Make clients cache directories and use them to seed their router
2205 lists at startup. This means clients have a datadir again.
2206 - Respond to content-encoding headers by trying to uncompress as
2208 - Clients and servers now fetch running-routers; cache
2209 running-routers; compress running-routers; serve compressed
2211 - Make moria2 advertise a dirport of 80, so people behind firewalls
2212 will be able to get a directory.
2213 - Http proxy support
2214 - Dirservers translate requests for http://%s:%d/x to /x
2215 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
2216 be routed through this host.
2217 - Clients ask for /tor/x rather than /x for new enough dirservers.
2218 This way we can one day coexist peacefully with apache.
2219 - Clients specify a "Host: %s%d" http header, to be compatible
2220 with more proxies, and so running squid on an exit node can work.
2221 - Protect dirservers from overzealous descriptor uploading -- wait
2222 10 seconds after directory gets dirty, before regenerating.
2224 o Features (packages and install):
2225 - Add NSI installer contributed by J Doe.
2226 - Apply NT service patch from Osamu Fujino. Still needs more work.
2227 - Commit VC6 and VC7 workspace/project files.
2228 - Commit a tor.spec for making RPM files, with help from jbash.
2229 - Add contrib/torctl.in contributed by Glenn Fink.
2230 - Make expand_filename handle ~ and ~username.
2231 - Use autoconf to enable largefile support where necessary. Use
2232 ftello where available, since ftell can fail at 2GB.
2233 - Ship src/win32/ in the tarball, so people can use it to build.
2234 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
2237 o Features (ui controller):
2238 - Control interface: a separate program can now talk to your
2239 client/server over a socket, and get/set config options, receive
2240 notifications of circuits and streams starting/finishing/dying,
2241 bandwidth used, etc. The next step is to get some GUIs working.
2242 Let us know if you want to help out. See doc/control-spec.txt .
2243 - Ship a contrib/tor-control.py as an example script to interact
2244 with the control port.
2245 - "tor --hash-password zzyxz" will output a salted password for
2246 use in authenticating to the control interface.
2247 - Implement the control-spec's SAVECONF command, to write your
2248 configuration to torrc.
2249 - Get cookie authentication for the controller closer to working.
2250 - When set_conf changes our server descriptor, upload a new copy.
2251 But don't upload it too often if there are frequent changes.
2253 o Features (config and command-line):
2254 - Deprecate unofficial config option abbreviations, and abbreviations
2255 not on the command line.
2256 - Configuration infrastructure support for warning on obsolete
2258 - Give a slightly more useful output for "tor -h".
2259 - Break DirFetchPostPeriod into:
2260 - DirFetchPeriod for fetching full directory,
2261 - StatusFetchPeriod for fetching running-routers,
2262 - DirPostPeriod for posting server descriptor,
2263 - RendPostPeriod for posting hidden service descriptors.
2264 - New log format in config:
2265 "Log minsev[-maxsev] stdout|stderr|syslog" or
2266 "Log minsev[-maxsev] file /var/foo"
2267 - DirPolicy config option, to let people reject incoming addresses
2268 from their dirserver.
2269 - "tor --list-fingerprint" will list your identity key fingerprint
2271 - Make tor --version --version dump the cvs Id of every file.
2272 - New 'MyFamily nick1,...' config option for a server to
2273 specify other servers that shouldn't be used in the same circuit
2274 with it. Only believed if nick1 also specifies us.
2275 - New 'NodeFamily nick1,nick2,...' config option for a client to
2276 specify nodes that it doesn't want to use in the same circuit.
2277 - New 'Redirectexit pattern address:port' config option for a
2278 server to redirect exit connections, e.g. to a local squid.
2279 - Add "pass" target for RedirectExit, to make it easier to break
2280 out of a sequence of RedirectExit rules.
2281 - Make the dirservers file obsolete.
2282 - Include a dir-signing-key token in directories to tell the
2283 parsing entity which key is being used to sign.
2284 - Remove the built-in bulky default dirservers string.
2285 - New config option "Dirserver %s:%d [fingerprint]", which can be
2286 repeated as many times as needed. If no dirservers specified,
2287 default to moria1,moria2,tor26.
2288 - Make 'Routerfile' config option obsolete.
2289 - Discourage people from setting their dirfetchpostperiod more often
2290 than once per minute.
2293 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
2294 get back to normal.)
2295 - Accept *:706 (silc) in default exit policy.
2296 - Implement new versioning format for post 0.1.
2297 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
2298 log more informatively.
2299 - Check clock skew for verified servers, but allow unverified
2300 servers and clients to have any clock skew.
2301 - Make sure the hidden service descriptors are at a random offset
2302 from each other, to hinder linkability.
2303 - Clients now generate a TLS cert too, in preparation for having
2304 them act more like real nodes.
2305 - Add a pure-C tor-resolve implementation.
2306 - Use getrlimit and friends to ensure we can reach MaxConn (currently
2307 1024) file descriptors.
2308 - Raise the max dns workers from 50 to 100.
2311 Changes in version 0.0.8.1 - 2004-10-13
2313 - Fix a seg fault that can be triggered remotely for Tor
2314 clients/servers with an open dirport.
2315 - Fix a rare assert trigger, where routerinfos for entries in
2316 our cpath would expire while we're building the path.
2317 - Fix a bug in OutboundBindAddress so it (hopefully) works.
2318 - Fix a rare seg fault for people running hidden services on
2319 intermittent connections.
2320 - Fix a bug in parsing opt keywords with objects.
2321 - Fix a stale pointer assert bug when a stream detaches and
2323 - Fix a string format vulnerability (probably not exploitable)
2324 in reporting stats locally.
2325 - Fix an assert trigger: sometimes launching circuits can fail
2326 immediately, e.g. because too many circuits have failed recently.
2327 - Fix a compile warning on 64 bit platforms.
2330 Changes in version 0.0.8 - 2004-08-25
2332 - Made our unit tests compile again on OpenBSD 3.5, and tor
2333 itself compile again on OpenBSD on a sparc64.
2334 - We were neglecting milliseconds when logging on win32, so
2335 everything appeared to happen at the beginning of each second.
2336 - Check directory signature _before_ you decide whether you're
2337 you're running an obsolete version and should exit.
2338 - Check directory signature _before_ you parse the running-routers
2339 list to decide who's running.
2340 - Check return value of fclose while writing to disk, so we don't
2341 end up with broken files when servers run out of disk space.
2342 - Port it to SunOS 5.9 / Athena
2343 - Fix two bugs in saving onion keys to disk when rotating, so
2344 hopefully we'll get fewer people using old onion keys.
2345 - Remove our mostly unused -- and broken -- hex_encode()
2346 function. Use base16_encode() instead. (Thanks to Timo Lindfors
2347 for pointing out this bug.)
2348 - Only pick and establish intro points after we've gotten a
2350 - Fix assert triggers: if the other side returns an address 0.0.0.0,
2351 don't put it into the client dns cache.
2352 - If a begin failed due to exit policy, but we believe the IP
2353 address should have been allowed, switch that router to exitpolicy
2354 reject *:* until we get our next directory.
2357 - 'Extend' relay cell payloads now include the digest of the
2358 intended next hop's identity key. Now we can verify that we're
2359 extending to the right router, and also extend to routers we
2360 hadn't heard of before.
2363 - Tor nodes can now act as relays (with an advertised ORPort)
2364 without being manually verified by the dirserver operators.
2365 - Uploaded descriptors of unverified routers are now accepted
2366 by the dirservers, and included in the directory.
2367 - Verified routers are listed by nickname in the running-routers
2368 list; unverified routers are listed as "$<fingerprint>".
2369 - We now use hash-of-identity-key in most places rather than
2370 nickname or addr:port, for improved security/flexibility.
2371 - AllowUnverifiedNodes config option to let circuits choose no-name
2372 routers in entry,middle,exit,introduction,rendezvous positions.
2373 Allow middle and rendezvous positions by default.
2374 - When picking unverified routers, skip those with low uptime and/or
2375 low bandwidth, depending on what properties you care about.
2376 - ClientOnly option for nodes that never want to become servers.
2377 - Directory caching.
2378 - "AuthoritativeDir 1" option for the official dirservers.
2379 - Now other nodes (clients and servers) will cache the latest
2380 directory they've pulled down.
2381 - They can enable their DirPort to serve it to others.
2382 - Clients will pull down a directory from any node with an open
2383 DirPort, and check the signature/timestamp correctly.
2384 - Authoritative dirservers now fetch directories from other
2385 authdirservers, to stay better synced.
2386 - Running-routers list tells who's down also, along with noting
2387 if they're verified (listed by nickname) or unverified (listed
2389 - Allow dirservers to serve running-router list separately.
2390 This isn't used yet.
2391 - You can now fetch $DIRURL/running-routers to get just the
2392 running-routers line, not the whole descriptor list. (But
2393 clients don't use this yet.)
2394 - Clients choose nodes proportional to advertised bandwidth.
2395 - Clients avoid using nodes with low uptime as introduction points.
2396 - Handle servers with dynamic IP addresses: don't just replace
2397 options->Address with the resolved one at startup, and
2398 detect our address right before we make a routerinfo each time.
2399 - 'FascistFirewall' option to pick dirservers and ORs on specific
2400 ports; plus 'FirewallPorts' config option to tell FascistFirewall
2401 which ports are open. (Defaults to 80,443)
2402 - Try other dirservers immediately if the one you try is down. This
2403 should tolerate down dirservers better now.
2404 - ORs connect-on-demand to other ORs
2405 - If you get an extend cell to an OR you're not connected to,
2406 connect, handshake, and forward the create cell.
2407 - The authoritative dirservers stay connected to everybody,
2408 and everybody stays connected to 0.0.7 servers, but otherwise
2409 clients/servers expire unused connections after 5 minutes.
2410 - When servers get a sigint, they delay 30 seconds (refusing new
2411 connections) then exit. A second sigint causes immediate exit.
2412 - File and name management:
2413 - Look for .torrc if no CONFDIR "torrc" is found.
2414 - If no datadir is defined, then choose, make, and secure ~/.tor
2416 - If torrc not found, exitpolicy reject *:*.
2417 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
2418 - If no nickname is defined, derive default from hostname.
2419 - Rename secret key files, e.g. identity.key -> secret_id_key,
2420 to discourage people from mailing their identity key to tor-ops.
2421 - Refuse to build a circuit before the directory has arrived --
2422 it won't work anyway, since you won't know the right onion keys
2424 - Parse tor version numbers so we can do an is-newer-than check
2425 rather than an is-in-the-list check.
2426 - New socks command 'resolve', to let us shim gethostbyname()
2428 - A 'tor_resolve' script to access the socks resolve functionality.
2429 - A new socks-extensions.txt doc file to describe our
2430 interpretation and extensions to the socks protocols.
2431 - Add a ContactInfo option, which gets published in descriptor.
2432 - Write tor version at the top of each log file
2433 - New docs in the tarball:
2435 - Document that you should proxy your SSL traffic too.
2436 - Log a warning if the user uses an unsafe socks variant, so people
2437 are more likely to learn about privoxy or socat.
2438 - Log a warning if you're running an unverified server, to let you
2439 know you might want to get it verified.
2440 - Change the default exit policy to reject the default edonkey,
2441 kazaa, gnutella ports.
2442 - Add replace_file() to util.[ch] to handle win32's rename().
2443 - Publish OR uptime in descriptor (and thus in directory) too.
2444 - Remember used bandwidth (both in and out), and publish 15-minute
2445 snapshots for the past day into our descriptor.
2446 - Be more aggressive about trying to make circuits when the network
2447 has changed (e.g. when you unsuspend your laptop).
2448 - Check for time skew on http headers; report date in response to
2450 - If the entrynode config line has only one node, don't pick it as
2452 - Add strict{entry|exit}nodes config options. If set to 1, then
2453 we refuse to build circuits that don't include the specified entry
2455 - OutboundBindAddress config option, to bind to a specific
2456 IP address for outgoing connect()s.
2457 - End truncated log entries (e.g. directories) with "[truncated]".
2460 Changes in version 0.0.7.3 - 2004-08-12
2461 o Stop dnsworkers from triggering an assert failure when you
2462 ask them to resolve the host "".
2465 Changes in version 0.0.7.2 - 2004-07-07
2466 o A better fix for the 0.0.0.0 problem, that will hopefully
2467 eliminate the remaining related assertion failures.
2470 Changes in version 0.0.7.1 - 2004-07-04
2471 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
2472 since internally we use 0.0.0.0 to signify "not yet resolved".
2475 Changes in version 0.0.7 - 2004-06-07
2476 o Fixes for crashes and other obnoxious bugs:
2477 - Fix an epipe bug: sometimes when directory connections failed
2478 to connect, we would give them a chance to flush before closing
2480 - When we detached from a circuit because of resolvefailed, we
2481 would immediately try the same circuit twice more, and then
2482 give up on the resolve thinking we'd tried three different
2484 - Limit the number of intro circuits we'll attempt to build for a
2485 hidden service per 15-minute period.
2486 - Check recommended-software string *early*, before actually parsing
2487 the directory. Thus we can detect an obsolete version and exit,
2488 even if the new directory format doesn't parse.
2489 o Fixes for security bugs:
2490 - Remember which nodes are dirservers when you startup, and if a
2491 random OR enables his dirport, don't automatically assume he's
2492 a trusted dirserver.
2494 - Directory connections were asking the wrong poll socket to
2495 start writing, and not asking themselves to start writing.
2496 - When we detached from a circuit because we sent a begin but
2497 didn't get a connected, we would use it again the first time;
2498 but after that we would correctly switch to a different one.
2499 - Stop warning when the first onion decrypt attempt fails; they
2500 will sometimes legitimately fail now that we rotate keys.
2501 - Override unaligned-access-ok check when $host_cpu is ia64 or
2502 arm. Apparently they allow it but the kernel whines.
2503 - Dirservers try to reconnect periodically too, in case connections
2505 - Fix some memory leaks in directory servers.
2506 - Allow backslash in Win32 filenames.
2507 - Made Tor build complain-free on FreeBSD, hopefully without
2508 breaking other BSD builds. We'll see.
2509 - Check directory signatures based on name of signer, not on whom
2510 we got the directory from. This will let us cache directories more
2512 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
2515 - Doxygen markup on all functions and global variables.
2516 - Make directory functions update routerlist, not replace it. So
2517 now directory disagreements are not so critical a problem.
2518 - Remove the upper limit on number of descriptors in a dirserver's
2519 directory (not that we were anywhere close).
2520 - Allow multiple logfiles at different severity ranges.
2521 - Allow *BindAddress to specify ":port" rather than setting *Port
2522 separately. Allow multiple instances of each BindAddress config
2523 option, so you can bind to multiple interfaces if you want.
2524 - Allow multiple exit policy lines, which are processed in order.
2525 Now we don't need that huge line with all the commas in it.
2526 - Enable accept/reject policies on SOCKS connections, so you can bind
2527 to 0.0.0.0 but still control who can use your OP.
2528 - Updated the man page to reflect these features.
2531 Changes in version 0.0.6.2 - 2004-05-16
2532 o Our integrity-checking digest was checking only the most recent cell,
2533 not the previous cells like we'd thought.
2534 Thanks to Stefan Mark for finding the flaw!
2537 Changes in version 0.0.6.1 - 2004-05-06
2538 o Fix two bugs in our AES counter-mode implementation (this affected
2539 onion-level stream encryption, but not TLS-level). It turns
2540 out we were doing something much more akin to a 16-character
2541 polyalphabetic cipher. Oops.
2542 Thanks to Stefan Mark for finding the flaw!
2543 o Retire moria3 as a directory server, and add tor26 as a directory
2547 Changes in version 0.0.6 - 2004-05-02
2549 - Hidden services and rendezvous points are implemented. Go to
2550 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2551 hidden services. (This only works via a socks4a proxy such as
2552 Privoxy, and currently it's quite slow.)
2553 - We now rotate link (tls context) keys and onion keys.
2554 - CREATE cells now include oaep padding, so you can tell
2555 if you decrypted them correctly.
2556 - Retry stream correctly when we fail to connect because of
2557 exit-policy-reject (should try another) or can't-resolve-address.
2558 - When we hup a dirserver and we've *removed* a server from the
2559 approved-routers list, now we remove that server from the
2560 in-memory directories too.
2561 - Add bandwidthburst to server descriptor.
2562 - Directories now say which dirserver signed them.
2563 - Use a tor_assert macro that logs failed assertions too.
2564 - Since we don't support truncateds much, don't bother sending them;
2565 just close the circ.
2566 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2567 - Better debugging for tls errors
2568 - Set Content-Type on the directory and hidserv descriptor.
2569 - Remove IVs from cipher code, since AES-ctr has none.
2571 - Fix an assert trigger for exit nodes that's been plaguing us since
2572 the days of 0.0.2prexx (thanks weasel!)
2573 - Fix a bug where we were closing tls connections intermittently.
2574 It turns out openssl keeps its errors around -- so if an error
2575 happens, and you don't ask about it, and then another openssl
2576 operation happens and succeeds, and you ask if there was an error,
2577 it tells you about the first error.
2578 - Fix a bug that's been lurking since 27 may 03 (!)
2579 When passing back a destroy cell, we would use the wrong circ id.
2580 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2581 - Some versions of openssl have an SSL_pending function that erroneously
2582 returns bytes when there is a non-application record pending.
2583 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2584 o We were using an array of length zero in a few places.
2585 o Win32's gethostbyname can't resolve an IP to an IP.
2586 o Win32's close can't close a socket.
2587 o Handle windows socket errors correctly.
2589 - check for <sys/limits.h> so we build on FreeBSD again, and
2590 <machine/limits.h> for NetBSD.
2593 Changes in version 0.0.5 - 2004-03-30
2594 o Install torrc as torrc.sample -- we no longer clobber your
2596 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2597 o Only build circuits after we've fetched the directory: clients were
2598 using only the directory servers before they'd fetched a directory.
2599 This also means longer startup time; so it goes.
2600 o Fix an assert trigger where an OP would fail to handshake, and we'd
2601 expect it to have a nickname.
2602 o Work around a tsocks bug: do a socks reject when AP connection dies
2603 early, else tsocks goes into an infinite loop.
2604 o Hold socks connection open until reply is flushed (if possible)
2605 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2606 the dns farm to do it.
2607 o Fix c99 aliasing warnings in rephist.c
2608 o Don't include server descriptors that are older than 24 hours in the
2610 o Give socks 'reject' replies their whole 15s to attempt to flush,
2611 rather than seeing the 60s timeout and assuming the flush had failed.
2612 o Clean automake droppings from the cvs repository
2613 o Add in a 'notice' log level for things the operator should hear
2614 but that aren't warnings
2617 Changes in version 0.0.4 - 2004-03-26
2618 o When connecting to a dirserver or OR and the network is down,
2622 Changes in version 0.0.3 - 2004-03-26
2623 o Warn and fail if server chose a nickname with illegal characters
2624 o Port to Solaris and Sparc:
2625 - include missing header fcntl.h
2626 - have autoconf find -lsocket -lnsl automatically
2627 - deal with hardware word alignment
2628 - make uname() work (solaris has a different return convention)
2629 - switch from using signal() to sigaction()
2630 o Preliminary work on reputation system:
2631 - Keep statistics on success/fail of connect attempts; they're published
2632 by kill -USR1 currently.
2633 - Add a RunTesting option to try to learn link state by creating test
2634 circuits, even when SocksPort is off.
2635 - Remove unused open circuits when there are too many.
2638 Changes in version 0.0.2 - 2004-03-19
2639 - Include strlcpy and strlcat for safer string ops
2640 - define INADDR_NONE so we compile (but still not run) on solaris
2643 Changes in version 0.0.2pre27 - 2004-03-14
2645 - Allow internal tor networks (we were rejecting internal IPs,
2646 now we allow them if they're set explicitly).
2647 - And fix a few endian issues.
2650 Changes in version 0.0.2pre26 - 2004-03-14
2652 - If a stream times out after 15s without a connected cell, don't
2653 try that circuit again: try a new one.
2654 - Retry streams at most 4 times. Then give up.
2655 - When a dirserver gets a descriptor from an unknown router, it
2656 logs its fingerprint (so the dirserver operator can choose to
2657 accept it even without mail from the server operator).
2658 - Inform unapproved servers when we reject their descriptors.
2659 - Make tor build on Windows again. It works as a client, who knows
2661 - Clearer instructions in the torrc for how to set up a server.
2662 - Be more efficient about reading fd's when our global token bucket
2663 (used for rate limiting) becomes empty.
2665 - Stop asserting that computers always go forward in time. It's
2667 - When we sent a cell (e.g. destroy) and then marked an OR connection
2668 expired, we might close it before finishing a flush if the other
2669 side isn't reading right then.
2670 - Don't allow dirservers to start if they haven't defined
2672 - We were caching transient dns failures. Oops.
2673 - Prevent servers from publishing an internal IP as their address.
2674 - Address a strcat vulnerability in circuit.c
2677 Changes in version 0.0.2pre25 - 2004-03-04
2679 - Put the OR's IP in its router descriptor, not its fqdn. That way
2680 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2683 - If the user typed in an address that didn't resolve, the server
2687 Changes in version 0.0.2pre24 - 2004-03-03
2689 - Fix an assertion failure in dns.c, where we were trying to dequeue
2690 a pending dns resolve even if it wasn't pending
2691 - Fix a spurious socks5 warning about still trying to write after the
2692 connection is finished.
2693 - Hold certain marked_for_close connections open until they're finished
2694 flushing, rather than losing bytes by closing them too early.
2695 - Correctly report the reason for ending a stream
2696 - Remove some duplicate calls to connection_mark_for_close
2697 - Put switch_id and start_daemon earlier in the boot sequence, so it
2698 will actually try to chdir() to options.DataDirectory
2699 - Make 'make test' exit(1) if a test fails; fix some unit tests
2700 - Make tor fail when you use a config option it doesn't know about,
2701 rather than warn and continue.
2702 - Make --version work
2703 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2706 Changes in version 0.0.2pre23 - 2004-02-29
2708 - Print a statement when the first circ is finished, so the user
2710 - If a relay cell is unrecognized at the end of the circuit,
2711 send back a destroy. (So attacks to mutate cells are more
2713 - New config option 'excludenodes' to avoid certain nodes for circuits.
2714 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2715 so you can collect coredumps there.
2717 - Fix a bug in tls flushing where sometimes data got wedged and
2718 didn't flush until more data got sent. Hopefully this bug was
2719 a big factor in the random delays we were seeing.
2720 - Make 'connected' cells include the resolved IP, so the client
2721 dns cache actually gets populated.
2722 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2723 - When we time-out on a stream and detach from the circuit, send an
2724 end cell down it first.
2725 - Only warn about an unknown router (in exitnodes, entrynodes,
2726 excludenodes) after we've fetched a directory.
2729 Changes in version 0.0.2pre22 - 2004-02-26
2731 - Servers publish less revealing uname information in descriptors.
2732 - More memory tracking and assertions, to crash more usefully when
2734 - If the default torrc isn't there, just use some default defaults.
2735 Plus provide an internal dirservers file if they don't have one.
2736 - When the user tries to use Tor as an http proxy, give them an http
2737 501 failure explaining that we're a socks proxy.
2738 - Dump a new router.desc on hup, to help confused people who change
2739 their exit policies and then wonder why router.desc doesn't reflect
2741 - Clean up the generic tor.sh init script that we ship with.
2743 - If the exit stream is pending on the resolve, and a destroy arrives,
2744 then the stream wasn't getting removed from the pending list. I
2745 think this was the one causing recent server crashes.
2746 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2747 - When it couldn't resolve any dirservers, it was useless from then on.
2748 Now it reloads the RouterFile (or default dirservers) if it has no
2750 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2751 many users don't even *have* a /usr/local/sbin/.
2754 Changes in version 0.0.2pre21 - 2004-02-18
2756 - There's a ChangeLog file that actually reflects the changelog.
2757 - There's a 'torify' wrapper script, with an accompanying
2758 tor-tsocks.conf, that simplifies the process of using tsocks for
2759 tor. It even has a man page.
2760 - The tor binary gets installed to sbin rather than bin now.
2761 - Retry streams where the connected cell hasn't arrived in 15 seconds
2762 - Clean up exit policy handling -- get the default out of the torrc,
2763 so we can update it without forcing each server operator to fix
2765 - Allow imaps and pop3s in default exit policy
2767 - Prevent picking middleman nodes as the last node in the circuit
2770 Changes in version 0.0.2pre20 - 2004-01-30
2772 - We now have a deb package, and it's in debian unstable. Go to
2774 - I've split the TotalBandwidth option into BandwidthRate (how many
2775 bytes per second you want to allow, long-term) and
2776 BandwidthBurst (how many bytes you will allow at once before the cap
2777 kicks in). This better token bucket approach lets you, say, set
2778 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2779 performance while not exceeding your monthly bandwidth quota.
2780 - Push out a tls record's worth of data once you've got it, rather
2781 than waiting until you've read everything waiting to be read. This
2782 may improve performance by pipelining better. We'll see.
2783 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2784 from failed circuits (if they haven't been connected yet) and attach
2786 - Expire old streams that haven't managed to connect. Some day we'll
2787 have them reattach to new circuits instead.
2790 - Fix several memory leaks that were causing servers to become bloated
2792 - Fix a few very rare assert triggers. A few more remain.
2793 - Setuid to User _before_ complaining about running as root.
2796 Changes in version 0.0.2pre19 - 2004-01-07
2798 - Fix deadlock condition in dns farm. We were telling a child to die by
2799 closing the parent's file descriptor to him. But newer children were
2800 inheriting the open file descriptor from the parent, and since they
2801 weren't closing it, the socket never closed, so the child never read
2802 eof, so he never knew to exit. Similarly, dns workers were holding
2803 open other sockets, leading to all sorts of chaos.
2804 - New cleaner daemon() code for forking and backgrounding.
2805 - If you log to a file, it now prints an entry at the top of the
2806 logfile so you know it's working.
2807 - The onionskin challenge length was 30 bytes longer than necessary.
2808 - Started to patch up the spec so it's not quite so out of date.
2811 Changes in version 0.0.2pre18 - 2004-01-02
2813 - Fix endian issues with the 'integrity' field in the relay header.
2814 - Fix a potential bug where connections in state
2815 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2818 Changes in version 0.0.2pre17 - 2003-12-30
2820 - Made --debuglogfile (or any second log file, actually) work.
2821 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2822 adversary could force us into an infinite loop.
2825 - Each onionskin handshake now includes a hash of the computed key,
2826 to prove the server's identity and help perfect forward secrecy.
2827 - Changed cell size from 256 to 512 bytes (working toward compatibility
2829 - Changed cell length to 2 bytes, and moved it to the relay header.
2830 - Implemented end-to-end integrity checking for the payloads of
2832 - Separated streamid from 'recognized' (otherwise circuits will get
2833 messed up when we try to have streams exit from the middle). We
2834 use the integrity-checking to confirm that a cell is addressed to
2836 - Randomize the initial circid and streamid values, so an adversary who
2837 breaks into a node can't learn how many circuits or streams have
2841 Changes in version 0.0.2pre16 - 2003-12-14
2843 - Fixed a bug that made HUP trigger an assert
2844 - Fixed a bug where a circuit that immediately failed wasn't being
2845 counted as a failed circuit in counting retries.
2848 - Now we close the circuit when we get a truncated cell: otherwise we're
2849 open to an anonymity attack where a bad node in the path truncates
2850 the circuit and then we open streams at him.
2851 - Add port ranges to exit policies
2852 - Add a conservative default exit policy
2853 - Warn if you're running tor as root
2854 - on HUP, retry OR connections and close/rebind listeners
2855 - options.EntryNodes: try these nodes first when picking the first node
2856 - options.ExitNodes: if your best choices happen to include any of
2857 your preferred exit nodes, you choose among just those preferred
2859 - options.ExcludedNodes: nodes that are never picked in path building
2862 Changes in version 0.0.2pre15 - 2003-12-03
2863 o Robustness and bugfixes:
2864 - Sometimes clients would cache incorrect DNS resolves, which would
2865 really screw things up.
2866 - An OP that goes offline would slowly leak all its sockets and stop
2868 - A wide variety of bugfixes in exit node selection, exit policy
2869 handling, and processing pending streams when a new circuit is
2871 - Pick nodes for a path only from those the directory says are up
2872 - Choose randomly from all running dirservers, not always the first one
2873 - Increase allowed http header size for directory fetch.
2874 - Stop writing to stderr (if we're daemonized it will be closed).
2875 - Enable -g always, so cores will be more useful to me.
2876 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2879 - Wrote a man page. It lists commonly used options.
2882 - Change default loglevel to warn.
2883 - Make PidFile default to null rather than littering in your CWD.
2884 - OnionRouter config option is now obsolete. Instead it just checks
2886 - Moved to a single unified torrc file for both clients and servers.
2889 Changes in version 0.0.2pre14 - 2003-11-29
2890 o Robustness and bugfixes:
2891 - Force the admin to make the DataDirectory himself
2892 - to get ownership/permissions right
2893 - so clients no longer make a DataDirectory and then never use it
2894 - fix bug where a client who was offline for 45 minutes would never
2895 pull down a directory again
2896 - fix (or at least hide really well) the dns assert bug that was
2897 causing server crashes
2898 - warnings and improved robustness wrt clockskew for certs
2899 - use the native daemon(3) to daemonize, when available
2900 - exit if bind() fails
2901 - exit if neither socksport nor orport is defined
2902 - include our own tor_timegm (Win32 doesn't have its own)
2903 - bugfix for win32 with lots of connections
2904 - fix minor bias in PRNG
2905 - make dirserver more robust to corrupt cached directory
2908 - Wrote the design document (woo)
2910 o Circuit building and exit policies:
2911 - Circuits no longer try to use nodes that the directory has told them
2913 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2914 bitcounts (18.0.0.0/8).
2915 - Make AP connections standby for a circuit if no suitable circuit
2916 exists, rather than failing
2917 - Circuits choose exit node based on addr/port, exit policies, and
2918 which AP connections are standing by
2919 - Bump min pathlen from 2 to 3
2920 - Relay end cells have a payload to describe why the stream ended.
2921 - If the stream failed because of exit policy, try again with a new
2923 - Clients have a dns cache to remember resolved addresses.
2924 - Notice more quickly when we have no working circuits
2927 - APPort is now called SocksPort
2928 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2930 - RecommendedVersions is now a config variable rather than
2931 hardcoded (for dirservers)
2932 - Reloads config on HUP
2933 - Usage info on -h or --help
2934 - If you set User and Group config vars, it'll setu/gid to them.
2936 Changes in version 0.0.2pre13 - 2003-10-19
2937 o General stability:
2938 - SSL_write no longer fails when it returns WANTWRITE and the number
2939 of bytes in the buf has changed by the next SSL_write call.
2940 - Fix segfault fetching directory when network is down
2941 - Fix a variety of minor memory leaks
2942 - Dirservers reload the fingerprints file on HUP, so I don't have
2943 to take down the network when I approve a new router
2944 - Default server config file has explicit Address line to specify fqdn
2947 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2948 - Make listener connections not ever alloc bufs
2950 o Autoconf improvements:
2951 - don't clobber an external CFLAGS in ./configure
2952 - Make install now works
2953 - create var/lib/tor on make install
2954 - autocreate a tor.sh initscript to help distribs
2955 - autocreate the torrc and sample-server-torrc with correct paths
2957 o Log files and Daemonizing now work:
2958 - If --DebugLogFile is specified, log to it at -l debug
2959 - If --LogFile is specified, use it instead of commandline
2960 - If --RunAsDaemon is set, tor forks and backgrounds on startup