1 Changes in version 0.1.2.7-alpha - 2007-??-??
3 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
5 - Previously, we would cache up to 16 old networkstatus documents
6 indefinitely, if they came from nontrusted authorities. Now we
7 discard them if they are more than 10 days old.
8 - Servers decline directory requests much more aggressively when
9 they're low on bandwidth. Otherwise they end up queueing more and
10 more directory responses, which can't be good for latency.
11 - Be willing to read or write on local connections (e.g. controller
12 connections) even when the global rate limiting buckets are empty.
13 - If our system clock jumps back in time, don't publish a negative
14 uptime in the descriptor. Also, don't let the global rate limiting
15 buckets go absurdly negative.
16 - Detect and reject malformed DNS responses containing circular
18 - Fix a memory leak when sending a 503 response for a networkstatus
20 - Flush local controller connection buffers periodically as we're
21 writing to them, so we avoid queueing 4+ megabytes of data before
25 - When computing clock skew from directory HTTP headers, consider what
26 time it was when we finished asking for the directory, not what
28 - Add some defensive programming to eventdns.c in an attempt to catch
29 possible memory-stomping bugs.
30 - Fix crash with "tor --list-fingerprint" (reported by seeess).
31 - Expire socks connections if they spend too long waiting for the
32 handshake to finish. Previously we would let them sit around for
33 days, if the connecting application didn't close them either.
34 - Stop using C functions that OpenBSD's linker doesn't like.
35 - Detect and reject DNS replies containing IPv4 or IPv6 records with
36 an incorrect number of bytes. (Previously, we would ignore the extra
38 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles in the
40 - Free memory held in recently-completed DNS lookup attempts on exit.
41 This was not a memory leak, but may have been hiding memory leaks.
42 - Don't launch requests for descriptors unless we have networkstatuses
43 from at least half of the authorities. This delays the first download
44 slightly under pathological circumstances, but can prevent us from
45 downloading a bunch of descriptors we don't need.
46 - Do not log IPs with TLS failures for incoming TLS connections. (Fixes
50 - Check for addresses with invalid characters at the exit as well as at
51 the client, and warn less verbosely when they fail. You can override
52 this by setting ServerDNSAllowNonRFC953Addresses to 1.
53 - Adapt a patch from goodell to let the contrib/exitlist script
54 take arguments rather than require direct editing.
56 o Minor features (controller):
57 - Track reasons for OR connection failure; make these reasons available
58 via the controller interface. (Patch from Mike Perry.)
59 - Add a SOCKS_BAD_HOSTNAME client status event so controllers can learn
60 when clients are sending malformed hostnames to Tor.
61 - Clean up documentation for controller status events.
64 Changes in version 0.1.2.6-alpha - 2007-01-09
66 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
67 connection handles more than 4 gigs in either direction, we crash.
68 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
69 advertised exit node, somebody might try to exit from us when
70 we're bootstrapping and before we've built your descriptor yet.
71 Refuse the connection rather than crashing.
74 - Warn if we (as a server) find that we've resolved an address that we
75 weren't planning to resolve.
76 - Warn that using select() on any libevent version before 1.1 will be
77 unnecessarily slow (even for select()).
78 - Flush ERR-level controller status events just like we currently
79 flush ERR-level log events, so that a Tor shutdown doesn't prevent
80 the controller from learning about current events.
82 o Minor features (more controller status events):
83 - Implement EXTERNAL_ADDRESS server status event so controllers can
84 learn when our address changes.
85 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
86 can learn when directories reject our descriptor.
87 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
88 can learn when a client application is speaking a non-socks protocol
90 - Implement DANGEROUS_SOCKS client status event so controllers
91 can learn when a client application is leaking DNS addresses.
92 - Implement BUG general status event so controllers can learn when
93 Tor is unhappy about its internal invariants.
94 - Implement CLOCK_SKEW general status event so controllers can learn
95 when Tor thinks the system clock is set incorrectly.
96 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
97 server status events so controllers can learn when their descriptors
98 are accepted by a directory.
99 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
100 server status events so controllers can learn about Tor's progress in
101 deciding whether it's reachable from the outside.
102 - Implement BAD_LIBEVENT general status event so controllers can learn
103 when we have a version/method combination in libevent that needs to
105 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
106 and DNS_USELESS server status events so controllers can learn
107 about changes to DNS server status.
109 o Minor features (directory):
110 - Authorities no longer recommend exits as guards if this would shift
111 too much load to the exit nodes.
114 Changes in version 0.1.2.5-alpha - 2007-01-06
116 - Enable write limiting as well as read limiting. Now we sacrifice
117 capacity if we're pushing out lots of directory traffic, rather
118 than overrunning the user's intended bandwidth limits.
119 - Include TLS overhead when counting bandwidth usage; previously, we
120 would count only the bytes sent over TLS, but not the bytes used
122 - Support running the Tor service with a torrc not in the same
123 directory as tor.exe and default to using the torrc located in
124 the %appdata%\Tor\ of the user who installed the service. Patch
126 - Servers now check for the case when common DNS requests are going to
127 wildcarded addresses (i.e. all getting the same answer), and change
128 their exit policy to reject *:* if it's happening.
129 - Implement BEGIN_DIR cells, so we can connect to the directory
130 server via TLS to do encrypted directory requests rather than
131 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
132 config options if you like.
134 o Minor features (config and docs):
135 - Start using the state file to store bandwidth accounting data:
136 the bw_accounting file is now obsolete. We'll keep generating it
137 for a while for people who are still using 0.1.2.4-alpha.
138 - Try to batch changes to the state file so that we do as few
139 disk writes as possible while still storing important things in
141 - The state file and the bw_accounting file get saved less often when
142 the AvoidDiskWrites config option is set.
143 - Make PIDFile work on Windows (untested).
144 - Add internal descriptions for a bunch of configuration options:
145 accessible via controller interface and in comments in saved
147 - Reject *:563 (NNTPS) in the default exit policy. We already reject
148 NNTP by default, so this seems like a sensible addition.
149 - Clients now reject hostnames with invalid characters. This should
150 avoid some inadvertent info leaks. Add an option
151 AllowNonRFC953Hostnames to disable this behavior, in case somebody
152 is running a private network with hosts called @, !, and #.
153 - Add a maintainer script to tell us which options are missing
154 documentation: "make check-docs".
155 - Add a new address-spec.txt document to describe our special-case
156 addresses: .exit, .onion, and .noconnnect.
158 o Minor features (DNS):
159 - Ongoing work on eventdns infrastructure: now it has dns server
160 and ipv6 support. One day Tor will make use of it.
161 - Add client-side caching for reverse DNS lookups.
162 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
163 - When we change nameservers or IP addresses, reset and re-launch
164 our tests for DNS hijacking.
166 o Minor features (directory):
167 - Authorities now specify server versions in networkstatus. This adds
168 about 2% to the side of compressed networkstatus docs, and allows
169 clients to tell which servers support BEGIN_DIR and which don't.
170 The implementation is forward-compatible with a proposed future
171 protocol version scheme not tied to Tor versions.
172 - DirServer configuration lines now have an orport= option so
173 clients can open encrypted tunnels to the authorities without
174 having downloaded their descriptors yet. Enabled for moria1,
175 moria2, tor26, and lefkada now in the default configuration.
176 - Directory servers are more willing to send a 503 "busy" if they
177 are near their write limit, especially for v1 directory requests.
178 Now they can use their limited bandwidth for actual Tor traffic.
179 - Clients track responses with status 503 from dirservers. After a
180 dirserver has given us a 503, we try not to use it until an hour has
181 gone by, or until we have no dirservers that haven't given us a 503.
182 - When we get a 503 from a directory, and we're not a server, we don't
183 count the failure against the total number of failures allowed
184 for the thing we're trying to download.
185 - Report X-Your-Address-Is correctly from tunneled directory
186 connections; don't report X-Your-Address-Is when it's an internal
187 address; and never believe reported remote addresses when they're
189 - Protect against an unlikely DoS attack on directory servers.
190 - Add a BadDirectory flag to network status docs so that authorities
191 can (eventually) tell clients about caches they believe to be
194 o Minor features (controller):
195 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
196 - Reimplement GETINFO so that info/names stays in sync with the
198 - Implement "GETINFO fingerprint".
199 - Implement "SETEVENTS GUARD" so controllers can get updates on
200 entry guard status as it changes.
202 o Minor features (clean up obsolete pieces):
203 - Remove some options that have been deprecated since at least
204 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
205 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
207 - We no longer look for identity and onion keys in "identity.key" and
208 "onion.key" -- these were replaced by secret_id_key and
209 secret_onion_key in 0.0.8pre1.
210 - We no longer require unrecognized directory entries to be
213 o Major bugfixes (security):
214 - Stop sending the HttpProxyAuthenticator string to directory
215 servers when directory connections are tunnelled through Tor.
216 - Clients no longer store bandwidth history in the state file.
217 - Do not log introduction points for hidden services if SafeLogging
219 - When generating bandwidth history, round down to the nearest
220 1k. When storing accounting data, round up to the nearest 1k.
221 - When we're running as a server, remember when we last rotated onion
222 keys, so that we will rotate keys once they're a week old even if
223 we never stay up for a week ourselves.
225 o Major bugfixes (other):
226 - Fix a longstanding bug in eventdns that prevented the count of
227 timed-out resolves from ever being reset. This bug caused us to
228 give up on a nameserver the third time it timed out, and try it
229 10 seconds later... and to give up on it every time it timed out
231 - Take out the '5 second' timeout from the connection retry
232 schedule. Now the first connect attempt will wait a full 10
233 seconds before switching to a new circuit. Perhaps this will help
234 a lot. Based on observations from Mike Perry.
235 - Fix a bug on the Windows implementation of tor_mmap_file() that
236 would prevent the cached-routers file from ever loading. Reported
240 - Fix an assert failure when a directory authority sets
241 AuthDirRejectUnlisted and then receives a descriptor from an
242 unlisted router. Reported by seeess.
243 - Avoid a double-free when parsing malformed DirServer lines.
244 - Fix a bug when a BSD-style PF socket is first used. Patch from
246 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
247 to resolve an address at a given exit node even when they ask for
249 - Servers no longer ever list themselves in their "family" line,
250 even if configured to do so. This makes it easier to configure
251 family lists conveniently.
252 - When running as a server, don't fall back to 127.0.0.1 when no
253 nameservers are configured in /etc/resolv.conf; instead, make the
254 user fix resolv.conf or specify nameservers explicitly. (Resolves
256 - Stop accepting certain malformed ports in configured exit policies.
257 - Don't re-write the fingerprint file every restart, unless it has
259 - Stop warning when a single nameserver fails: only warn when _all_ of
260 our nameservers have failed. Also, when we only have one nameserver,
261 raise the threshold for deciding that the nameserver is dead.
262 - Directory authorities now only decide that routers are reachable
263 if their identity keys are as expected.
264 - When the user uses bad syntax in the Log config line, stop
265 suggesting other bad syntax as a replacement.
266 - Correctly detect ipv6 DNS capability on OpenBSD.
268 o Minor bugfixes (controller):
269 - Report the circuit number correctly in STREAM CLOSED events. Bug
270 reported by Mike Perry.
271 - Do not report bizarre values for results of accounting GETINFOs
272 when the last second's write or read exceeds the allotted bandwidth.
273 - Report "unrecognized key" rather than an empty string when the
274 controller tries to fetch a networkstatus that doesn't exist.
277 Changes in version 0.1.2.4-alpha - 2006-12-03
279 - Add support for using natd; this allows FreeBSDs earlier than
280 5.1.2 to have ipfw send connections through Tor without using
281 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
284 - Make all connections to addresses of the form ".noconnect"
285 immediately get closed. This lets application/controller combos
286 successfully test whether they're talking to the same Tor by
287 watching for STREAM events.
288 - Make cross.sh cross-compilation script work even when autogen.sh
289 hasn't been run. (Patch from Michael Mohr.)
290 - Statistics dumped by -USR2 now include a breakdown of public key
291 operations, for profiling.
294 - Fix a major leak when directory authorities parse their
295 approved-routers list, a minor memory leak when we fail to pick
296 an exit node, and a few rare leaks on errors.
297 - Handle TransPort connections even when the server sends data before
298 the client sends data. Previously, the connection would just hang
299 until the client sent data. (Patch from tup based on patch from
301 - Avoid assert failure when our cached-routers file is empty on
305 - Don't log spurious warnings when we see a circuit close reason we
306 don't recognize; it's probably just from a newer version of Tor.
307 - Have directory authorities allow larger amounts of drift in uptime
308 without replacing the server descriptor: previously, a server that
309 restarted every 30 minutes could have 48 "interesting" descriptors
311 - Start linking to the Tor specification and Tor reference manual
312 correctly in the Windows installer.
313 - Add Vidalia to the OS X uninstaller script, so when we uninstall
314 Tor/Privoxy we also uninstall Vidalia.
315 - Resume building on Irix64, and fix a lot of warnings from its
317 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
318 when we're running as a client.
321 Changes in version 0.1.2.3-alpha - 2006-10-29
323 - Prepare for servers to publish descriptors less often: never
324 discard a descriptor simply for being too old until either it is
325 recommended by no authorities, or until we get a better one for
326 the same router. Make caches consider retaining old recommended
327 routers for even longer.
328 - If most authorities set a BadExit flag for a server, clients
329 don't think of it as a general-purpose exit. Clients only consider
330 authorities that advertise themselves as listing bad exits.
331 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
332 headers for content, so that we can work better in the presence of
333 caching HTTP proxies.
334 - Allow authorities to list nodes as bad exits by fingerprint or by
337 o Minor features, controller:
338 - Add a REASON field to CIRC events; for backward compatibility, this
339 field is sent only to controllers that have enabled the extended
340 event format. Also, add additional reason codes to explain why
341 a given circuit has been destroyed or truncated. (Patches from
343 - Add a REMOTE_REASON field to extended CIRC events to tell the
344 controller about why a remote OR told us to close a circuit.
345 - Stream events also now have REASON and REMOTE_REASON fields,
346 working much like those for circuit events.
347 - There's now a GETINFO ns/... field so that controllers can ask Tor
348 about the current status of a router.
349 - A new event type "NS" to inform a controller when our opinion of
350 a router's status has changed.
351 - Add a GETINFO events/names and GETINFO features/names so controllers
352 can tell which events and features are supported.
353 - A new CLEARDNSCACHE signal to allow controllers to clear the
354 client-side DNS cache without expiring circuits.
357 - When the user sends a NEWNYM signal, clear the client-side DNS
358 cache too. Otherwise we continue to act on previous information.
361 - Avoid sending junk to controllers or segfaulting when a controller
362 uses EVENT_NEW_DESC with verbose nicknames.
363 - Stop triggering asserts if the controller tries to extend hidden
364 service circuits (reported by mwenge).
365 - Avoid infinite loop on unexpected controller input.
366 - When the controller does a "GETINFO network-status", tell it
367 about even those routers whose descriptors are very old, and use
368 long nicknames where appropriate.
369 - Change NT service functions to be loaded on demand. This lets us
370 build with MinGW without breaking Tor for Windows 98 users.
371 - Do DirPort reachability tests less often, since a single test
372 chews through many circuits before giving up.
373 - In the hidden service example in torrc.sample, stop recommending
374 esoteric and discouraged hidden service options.
375 - When stopping an NT service, wait up to 10 sec for it to actually
376 stop. (Patch from Matt Edman; resolves bug 295.)
377 - Fix handling of verbose nicknames with ORCONN controller events:
378 make them show up exactly when requested, rather than exactly when
380 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
381 printing a duplicate "$" in the keys we send (reported by mwenge).
382 - Correctly set maximum connection limit on Cygwin. (This time
384 - Try to detect Windows correctly when cross-compiling.
385 - Detect the size of the routers file correctly even if it is
386 corrupted (on systems without mmap) or not page-aligned (on systems
387 with mmap). This bug was harmless.
388 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
389 to open a stream fails; now we do in more cases. This should
390 make clients able to find a good exit faster in some cases, since
391 unhandleable requests will now get an error rather than timing out.
392 - Resolve two memory leaks when rebuilding the on-disk router cache
393 (reported by fookoowa).
394 - Clean up minor code warnings suggested by the MIPSpro C compiler,
395 and reported by some Centos users.
396 - Controller signals now work on non-Unix platforms that don't define
397 SIGUSR1 and SIGUSR2 the way we expect.
398 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
399 values before failing, and always enables eventdns.
400 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
401 Try to fix this in configure.in by checking for most functions
402 before we check for libevent.
405 Changes in version 0.1.2.2-alpha - 2006-10-07
407 - Make our async eventdns library on-by-default for Tor servers,
408 and plan to deprecate the separate dnsworker threads.
409 - Add server-side support for "reverse" DNS lookups (using PTR
410 records so clients can determine the canonical hostname for a given
411 IPv4 address). Only supported by servers using eventdns; servers
412 now announce in their descriptors whether they support eventdns.
413 - Specify and implement client-side SOCKS5 interface for reverse DNS
414 lookups (see doc/socks-extensions.txt).
415 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
416 connect to directory servers through Tor. Previously, clients needed
417 to find Tor exits to make private connections to directory servers.
418 - Avoid choosing Exit nodes for entry or middle hops when the
419 total bandwidth available from non-Exit nodes is much higher than
420 the total bandwidth available from Exit nodes.
421 - Workaround for name servers (like Earthlink's) that hijack failing
422 DNS requests and replace the no-such-server answer with a "helpful"
423 redirect to an advertising-driven search portal. Also work around
424 DNS hijackers who "helpfully" decline to hijack known-invalid
425 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
426 lets you turn it off.
427 - Send out a burst of long-range padding cells once we've established
428 that we're reachable. Spread them over 4 circuits, so hopefully
429 a few will be fast. This exercises our bandwidth and bootstraps
430 us into the directory more quickly.
432 o New/improved config options:
433 - Add new config option "ResolvConf" to let the server operator
434 choose an alternate resolve.conf file when using eventdns.
435 - Add an "EnforceDistinctSubnets" option to control our "exclude
436 servers on the same /16" behavior. It's still on by default; this
437 is mostly for people who want to operate private test networks with
438 all the machines on the same subnet.
439 - If one of our entry guards is on the ExcludeNodes list, or the
440 directory authorities don't think it's a good guard, treat it as
441 if it were unlisted: stop using it as a guard, and throw it off
442 the guards list if it stays that way for a long time.
443 - Allow directory authorities to be marked separately as authorities
444 for the v1 directory protocol, the v2 directory protocol, and
445 as hidden service directories, to make it easier to retire old
446 authorities. V1 authorities should set "HSAuthoritativeDir 1"
447 to continue being hidden service authorities too.
448 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
450 o Minor features, controller:
451 - Fix CIRC controller events so that controllers can learn the
452 identity digests of non-Named servers used in circuit paths.
453 - Let controllers ask for more useful identifiers for servers. Instead
454 of learning identity digests for un-Named servers and nicknames
455 for Named servers, the new identifiers include digest, nickname,
456 and indication of Named status. Off by default; see control-spec.txt
457 for more information.
458 - Add a "getinfo address" controller command so it can display Tor's
459 best guess to the user.
460 - New controller event to alert the controller when our server
461 descriptor has changed.
462 - Give more meaningful errors on controller authentication failure.
464 o Minor features, other:
465 - When asked to resolve a hostname, don't use non-exit servers unless
466 requested to do so. This allows servers with broken DNS to be
467 useful to the network.
468 - Divide eventdns log messages into warn and info messages.
469 - Reserve the nickname "Unnamed" for routers that can't pick
470 a hostname: any router can call itself Unnamed; directory
471 authorities will never allocate Unnamed to any particular router;
472 clients won't believe that any router is the canonical Unnamed.
473 - Only include function names in log messages for info/debug messages.
474 For notice/warn/err, the content of the message should be clear on
475 its own, and printing the function name only confuses users.
476 - Avoid some false positives during reachability testing: don't try
477 to test via a server that's on the same /24 as us.
478 - If we fail to build a circuit to an intended enclave, and it's
479 not mandatory that we use that enclave, stop wanting it.
480 - When eventdns is enabled, allow multithreaded builds on NetBSD and
481 OpenBSD. (We had previously disabled threads on these platforms
482 because they didn't have working thread-safe resolver functions.)
484 o Major bugfixes, anonymity/security:
485 - If a client asked for a server by name, and there's a named server
486 in our network-status but we don't have its descriptor yet, we
487 could return an unnamed server instead.
488 - Fix NetBSD bug that could allow someone to force uninitialized RAM
489 to be sent to a server's DNS resolver. This only affects NetBSD
490 and other platforms that do not bounds-check tolower().
491 - Reject (most) attempts to use Tor circuits with length one. (If
492 many people start using Tor as a one-hop proxy, exit nodes become
493 a more attractive target for compromise.)
494 - Just because your DirPort is open doesn't mean people should be
495 able to remotely teach you about hidden service descriptors. Now
496 only accept rendezvous posts if you've got HSAuthoritativeDir set.
498 o Major bugfixes, other:
499 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
500 - When a client asks the server to resolve (not connect to)
501 an address, and it has a cached answer, give them the cached answer.
502 Previously, the server would give them no answer at all.
503 - Allow really slow clients to not hang up five minutes into their
504 directory downloads (suggested by Adam J. Richter).
505 - We were building exactly the wrong circuits when we anticipated
506 hidden service requirements, meaning Tor would have to build all
507 its circuits on demand.
508 - Avoid crashing when we mmap a router cache file of size 0.
509 - When testing reachability of our DirPort, don't launch new
510 tests when there's already one in progress -- unreachable
511 servers were stacking up dozens of testing streams.
513 o Minor bugfixes, correctness:
514 - If we're a directory mirror and we ask for "all" network status
515 documents, we would discard status documents from authorities
517 - Avoid a memory corruption bug when creating a hash table for
519 - Avoid controller-triggered crash when misusing certain commands
520 from a v0 controller on platforms that do not handle
521 printf("%s",NULL) gracefully.
522 - Don't crash when a controller sends a third argument to an
523 "extendcircuit" request.
524 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
525 response; fix error code when "getinfo dir/status/" fails.
526 - Avoid crash when telling controller stream-status and a stream
528 - Patch from Adam Langley to fix assert() in eventdns.c.
529 - Fix a debug log message in eventdns to say "X resolved to Y"
530 instead of "X resolved to X".
531 - Make eventdns give strings for DNS errors, not just error numbers.
532 - Track unreachable entry guards correctly: don't conflate
533 'unreachable by us right now' with 'listed as down by the directory
534 authorities'. With the old code, if a guard was unreachable by
535 us but listed as running, it would clog our guard list forever.
536 - Behave correctly in case we ever have a network with more than
537 2GB/s total advertised capacity.
538 - Make TrackExitHosts case-insensitive, and fix the behavior of
539 ".suffix" TrackExitHosts items to avoid matching in the middle of
541 - Finally fix the openssl warnings from newer gccs that believe that
542 ignoring a return value is okay, but casting a return value and
543 then ignoring it is a sign of madness.
544 - Prevent the contrib/exitlist script from printing the same
545 result more than once.
546 - Patch from Steve Hildrey: Generate network status correctly on
547 non-versioning dirservers.
548 - Don't listen to the X-Your-Address-Is hint if you did the lookup
549 via Tor; otherwise you'll think you're the exit node's IP address.
551 o Minor bugfixes, performance:
552 - Two small performance improvements on parsing descriptors.
553 - Major performance improvement on inserting descriptors: change
554 algorithm from O(n^2) to O(n).
555 - Make the common memory allocation path faster on machines where
556 malloc(0) returns a pointer.
557 - Start remembering X-Your-Address-Is directory hints even if you're
558 a client, so you can become a server more smoothly.
559 - Avoid duplicate entries on MyFamily line in server descriptor.
561 o Packaging, features:
562 - Remove architecture from OS X builds. The official builds are
563 now universal binaries.
564 - The Debian package now uses --verify-config when (re)starting,
565 to distinguish configuration errors from other errors.
566 - Update RPMs to require libevent 1.1b.
568 o Packaging, bugfixes:
569 - Patches so Tor builds with MinGW on Windows.
570 - Patches so Tor might run on Cygwin again.
571 - Resume building on non-gcc compilers and ancient gcc. Resume
572 building with the -O0 compile flag. Resume building cleanly on
574 - Run correctly on OS X platforms with case-sensitive filesystems.
575 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
576 - Add autoconf checks so Tor can build on Solaris x86 again.
579 - Documented (and renamed) ServerDNSSearchDomains and
580 ServerDNSResolvConfFile options.
581 - Be clearer that the *ListenAddress directives can be repeated
585 Changes in version 0.1.2.1-alpha - 2006-08-27
587 - Add "eventdns" async dns library from Adam Langley, tweaked to
588 build on OSX and Windows. Only enabled if you pass the
589 --enable-eventdns argument to configure.
590 - Allow servers with no hostname or IP address to learn their
591 IP address by asking the directory authorities. This code only
592 kicks in when you would normally have exited with a "no address"
593 error. Nothing's authenticated, so use with care.
594 - Rather than waiting a fixed amount of time between retrying
595 application connections, we wait only 5 seconds for the first,
596 10 seconds for the second, and 15 seconds for each retry after
597 that. Hopefully this will improve the expected user experience.
598 - Patch from Tup to add support for transparent AP connections:
599 this basically bundles the functionality of trans-proxy-tor
600 into the Tor mainline. Now hosts with compliant pf/netfilter
601 implementations can redirect TCP connections straight to Tor
602 without diverting through SOCKS. Needs docs.
603 - Busy directory servers save lots of memory by spooling server
604 descriptors, v1 directories, and v2 networkstatus docs to buffers
605 as needed rather than en masse. Also mmap the cached-routers
606 files, so we don't need to keep the whole thing in memory too.
607 - Automatically avoid picking more than one node from the same
608 /16 network when constructing a circuit.
609 - Revise and clean up the torrc.sample that we ship with; add
610 a section for BandwidthRate and BandwidthBurst.
613 - Split circuit_t into origin_circuit_t and or_circuit_t, and
614 split connection_t into edge, or, dir, control, and base structs.
615 These will save quite a bit of memory on busy servers, and they'll
616 also help us track down bugs in the code and bugs in the spec.
617 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
618 or later. Log when we are doing this, so we can diagnose it when
619 it fails. (Also, recommend libevent 1.1b for kqueue and
620 win32 methods; deprecate libevent 1.0b harder; make libevent
621 recommendation system saner.)
622 - Start being able to build universal binaries on OS X (thanks
624 - Export the default exit policy via the control port, so controllers
625 don't need to guess what it is / will be later.
626 - Add a man page entry for ProtocolWarnings.
627 - Add TestVia config option to the man page.
628 - Remove even more protocol-related warnings from Tor server logs,
629 such as bad TLS handshakes and malformed begin cells.
630 - Stop fetching descriptors if you're not a dir mirror and you
631 haven't tried to establish any circuits lately. [This currently
632 causes some dangerous behavior, because when you start up again
633 you'll use your ancient server descriptors.]
634 - New DirPort behavior: if you have your dirport set, you download
635 descriptors aggressively like a directory mirror, whether or not
637 - Get rid of the router_retry_connections notion. Now routers
638 no longer try to rebuild long-term connections to directory
639 authorities, and directory authorities no longer try to rebuild
640 long-term connections to all servers. We still don't hang up
641 connections in these two cases though -- we need to look at it
642 more carefully to avoid flapping, and we likely need to wait til
644 - Drop compatibility with obsolete Tors that permit create cells
645 to have the wrong circ_id_type.
646 - Re-enable per-connection rate limiting. Get rid of the "OP
647 bandwidth" concept. Lay groundwork for "bandwidth classes" --
648 separate global buckets that apply depending on what sort of conn
650 - Start publishing one minute or so after we find our ORPort
651 to be reachable. This will help reduce the number of descriptors
652 we have for ourselves floating around, since it's quite likely
653 other things (e.g. DirPort) will change during that minute too.
654 - Fork the v1 directory protocol into its own spec document,
655 and mark dir-spec.txt as the currently correct (v2) spec.
658 - When we find our DirPort to be reachable, publish a new descriptor
659 so we'll tell the world (reported by pnx).
660 - Publish a new descriptor after we hup/reload. This is important
661 if our config has changed such that we'll want to start advertising
662 our DirPort now, etc.
663 - Allow Tor to start when RunAsDaemon is set but no logs are set.
664 - When we have a state file we cannot parse, tell the user and
665 move it aside. Now we avoid situations where the user starts
666 Tor in 1904, Tor writes a state file with that timestamp in it,
667 the user fixes her clock, and Tor refuses to start.
668 - Fix configure.in to not produce broken configure files with
669 more recent versions of autoconf. Thanks to Clint for his auto*
671 - "tor --verify-config" now exits with -1(255) or 0 depending on
672 whether the config options are bad or good.
673 - Resolve bug 321 when using dnsworkers: append a period to every
674 address we resolve at the exit node, so that we do not accidentally
675 pick up local addresses, and so that failing searches are retried
676 in the resolver search domains. (This is already solved for
677 eventdns.) (This breaks Blossom servers for now.)
678 - If we are using an exit enclave and we can't connect, e.g. because
679 its webserver is misconfigured to not listen on localhost, then
680 back off and try connecting from somewhere else before we fail.
683 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
684 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
685 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
686 when the IP address is mapped through MapAddress to a hostname.
687 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
688 useless IPv6 DNS resolves.
689 - Patch suggested by Karsten Loesing: respond to SIGNAL command
690 before we execute the signal, in case the signal shuts us down.
691 - Clean up AllowInvalidNodes man page entry.
692 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
693 - Add more asserts to track down an assert error on a windows Tor
694 server with connection_add being called with socket == -1.
695 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
696 - Fix misleading log messages: an entry guard that is "unlisted",
697 as well as not known to be "down" (because we've never heard
698 of it), is not therefore "up".
699 - Remove code to special-case "-cvs" ending, since it has not
700 actually mattered since 0.0.9.
701 - Make our socks5 handling more robust to broken socks clients:
702 throw out everything waiting on the buffer in between socks
703 handshake phases, since they can't possibly (so the theory
704 goes) have predicted what we plan to respond to them.
707 Changes in version 0.1.1.26 - 2006-12-14
709 - Stop sending the HttpProxyAuthenticator string to directory
710 servers when directory connections are tunnelled through Tor.
711 - Clients no longer store bandwidth history in the state file.
712 - Do not log introduction points for hidden services if SafeLogging
716 - Fix an assert failure when a directory authority sets
717 AuthDirRejectUnlisted and then receives a descriptor from an
718 unlisted router (reported by seeess).
721 Changes in version 0.1.1.25 - 2006-11-04
723 - When a client asks us to resolve (rather than connect to)
724 an address, and we have a cached answer, give them the cached
725 answer. Previously, we would give them no answer at all.
726 - We were building exactly the wrong circuits when we predict
727 hidden service requirements, meaning Tor would have to build all
728 its circuits on demand.
729 - If none of our live entry guards have a high uptime, but we
730 require a guard with a high uptime, try adding a new guard before
731 we give up on the requirement. This patch should make long-lived
732 connections more stable on average.
733 - When testing reachability of our DirPort, don't launch new
734 tests when there's already one in progress -- unreachable
735 servers were stacking up dozens of testing streams.
738 - When the user sends a NEWNYM signal, clear the client-side DNS
739 cache too. Otherwise we continue to act on previous information.
742 - Avoid a memory corruption bug when creating a hash table for
744 - Avoid possibility of controller-triggered crash when misusing
745 certain commands from a v0 controller on platforms that do not
746 handle printf("%s",NULL) gracefully.
747 - Avoid infinite loop on unexpected controller input.
748 - Don't log spurious warnings when we see a circuit close reason we
749 don't recognize; it's probably just from a newer version of Tor.
750 - Add Vidalia to the OS X uninstaller script, so when we uninstall
751 Tor/Privoxy we also uninstall Vidalia.
754 Changes in version 0.1.1.24 - 2006-09-29
756 - Allow really slow clients to not hang up five minutes into their
757 directory downloads (suggested by Adam J. Richter).
758 - Fix major performance regression from 0.1.0.x: instead of checking
759 whether we have enough directory information every time we want to
760 do something, only check when the directory information has changed.
761 This should improve client CPU usage by 25-50%.
762 - Don't crash if, after a server has been running for a while,
763 it can't resolve its hostname.
764 - When a client asks us to resolve (not connect to) an address,
765 and we have a cached answer, give them the cached answer.
766 Previously, we would give them no answer at all.
769 - Allow Tor to start when RunAsDaemon is set but no logs are set.
770 - Don't crash when the controller receives a third argument to an
771 "extendcircuit" request.
772 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
773 response; fix error code when "getinfo dir/status/" fails.
774 - Fix configure.in to not produce broken configure files with
775 more recent versions of autoconf. Thanks to Clint for his auto*
777 - Fix security bug on NetBSD that could allow someone to force
778 uninitialized RAM to be sent to a server's DNS resolver. This
779 only affects NetBSD and other platforms that do not bounds-check
781 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
782 methods: these are known to be buggy.
783 - If we're a directory mirror and we ask for "all" network status
784 documents, we would discard status documents from authorities
788 Changes in version 0.1.1.23 - 2006-07-30
790 - Fast Tor servers, especially exit nodes, were triggering asserts
791 due to a bug in handling the list of pending DNS resolves. Some
792 bugs still remain here; we're hunting them.
793 - Entry guards could crash clients by sending unexpected input.
794 - More fixes on reachability testing: if you find yourself reachable,
795 then don't ever make any client requests (so you stop predicting
796 circuits), then hup or have your clock jump, then later your IP
797 changes, you won't think circuits are working, so you won't try to
798 test reachability, so you won't publish.
801 - Avoid a crash if the controller does a resetconf firewallports
802 and then a setconf fascistfirewall=1.
803 - Avoid an integer underflow when the dir authority decides whether
804 a router is stable: we might wrongly label it stable, and compute
805 a slightly wrong median stability, when a descriptor is published
807 - Fix a place where we might trigger an assert if we can't build our
808 own server descriptor yet.
811 Changes in version 0.1.1.22 - 2006-07-05
813 - Fix a big bug that was causing servers to not find themselves
814 reachable if they changed IP addresses. Since only 0.1.1.22+
815 servers can do reachability testing correctly, now we automatically
816 make sure to test via one of these.
817 - Fix to allow clients and mirrors to learn directory info from
818 descriptor downloads that get cut off partway through.
819 - Directory authorities had a bug in deciding if a newly published
820 descriptor was novel enough to make everybody want a copy -- a few
821 servers seem to be publishing new descriptors many times a minute.
823 - Fix a rare bug that was causing some servers to complain about
824 "closing wedged cpuworkers" and skip some circuit create requests.
825 - Make the Exit flag in directory status documents actually work.
828 Changes in version 0.1.1.21 - 2006-06-10
829 o Crash and assert fixes from 0.1.1.20:
830 - Fix a rare crash on Tor servers that have enabled hibernation.
831 - Fix a seg fault on startup for Tor networks that use only one
833 - Fix an assert from a race condition that occurs on Tor servers
834 while exiting, where various threads are trying to log that they're
835 exiting, and delete the logs, at the same time.
836 - Make our unit tests pass again on certain obscure platforms.
839 - Add support for building SUSE RPM packages.
840 - Speed up initial bootstrapping for clients: if we are making our
841 first ever connection to any entry guard, then don't mark it down
843 - When only one Tor server in the network is labelled as a guard,
844 and we've already picked him, we would cycle endlessly picking him
845 again, being unhappy about it, etc. Now we specifically exclude
846 current guards when picking a new guard.
847 - Servers send create cells more reliably after the TLS connection
848 is established: we were sometimes forgetting to send half of them
849 when we had more than one pending.
850 - If we get a create cell that asks us to extend somewhere, but the
851 Tor server there doesn't match the expected digest, we now send
852 a destroy cell back, rather than silently doing nothing.
853 - Make options->RedirectExit work again.
854 - Make cookie authentication for the controller work again.
855 - Stop being picky about unusual characters in the arguments to
856 mapaddress. It's none of our business.
857 - Add a new config option "TestVia" that lets you specify preferred
858 middle hops to use for test circuits. Perhaps this will let me
859 debug the reachability problems better.
861 o Log / documentation fixes:
862 - If we're a server and some peer has a broken TLS certificate, don't
863 log about it unless ProtocolWarnings is set, i.e., we want to hear
864 about protocol violations by others.
865 - Fix spelling of VirtualAddrNetwork in man page.
866 - Add a better explanation at the top of the autogenerated torrc file
867 about what happened to our old torrc.
870 Changes in version 0.1.1.20 - 2006-05-23
871 o Crash and assert fixes from 0.1.0.17:
872 - Fix assert bug in close_logs() on exit: when we close and delete
873 logs, remove them all from the global "logfiles" list.
874 - Fix an assert error when we're out of space in the connection_list
875 and we try to post a hidden service descriptor (reported by Peter
877 - Fix a rare assert error when we've tried all intro points for
878 a hidden service and we try fetching the service descriptor again:
879 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed".
880 - Setconf SocksListenAddress kills Tor if it fails to bind. Now back
881 out and refuse the setconf if it would fail.
882 - If you specify a relative torrc path and you set RunAsDaemon in
883 your torrc, then it chdir()'s to the new directory. If you then
884 HUP, it tries to load the new torrc location, fails, and exits.
885 The fix: no longer allow a relative path to torrc when using -f.
886 - Check for integer overflows in more places, when adding elements
887 to smartlists. This could possibly prevent a buffer overflow
888 on malicious huge inputs.
890 o Security fixes, major:
891 - When we're printing strings from the network, don't try to print
892 non-printable characters. Now we're safer against shell escape
893 sequence exploits, and also against attacks to fool users into
894 misreading their logs.
895 - Implement entry guards: automatically choose a handful of entry
896 nodes and stick with them for all circuits. Only pick new guards
897 when the ones you have are unsuitable, and if the old guards
898 become suitable again, switch back. This will increase security
899 dramatically against certain end-point attacks. The EntryNodes
900 config option now provides some hints about which entry guards you
901 want to use most; and StrictEntryNodes means to only use those.
903 - Implement exit enclaves: if we know an IP address for the
904 destination, and there's a running Tor server at that address
905 which allows exit to the destination, then extend the circuit to
906 that exit first. This provides end-to-end encryption and end-to-end
907 authentication. Also, if the user wants a .exit address or enclave,
908 use 4 hops rather than 3, and cannibalize a general circ for it
910 - Obey our firewall options more faithfully:
911 . If we can't get to a dirserver directly, try going via Tor.
912 . Don't ever try to connect (as a client) to a place our
913 firewall options forbid.
914 . If we specify a proxy and also firewall options, obey the
915 firewall options even when we're using the proxy: some proxies
916 can only proxy to certain destinations.
917 - Make clients regenerate their keys when their IP address changes.
918 - For the OS X package's modified privoxy config file, comment
919 out the "logfile" line so we don't log everything passed
921 - Our TLS handshakes were generating a single public/private
922 keypair for the TLS context, rather than making a new one for
923 each new connection. Oops. (But we were still rotating them
924 periodically, so it's not so bad.)
925 - When we were cannibalizing a circuit with a particular exit
926 node in mind, we weren't checking to see if that exit node was
927 already present earlier in the circuit. Now we are.
928 - Require server descriptors to list IPv4 addresses -- hostnames
929 are no longer allowed. This also fixes potential vulnerabilities
930 to servers providing hostnames as their address and then
931 preferentially resolving them so they can partition users.
932 - Our logic to decide if the OR we connected to was the right guy
933 was brittle and maybe open to a mitm for invalid routers.
935 o Security fixes, minor:
936 - Adjust tor-spec.txt to parameterize cell and key lengths. Now
937 Ian Goldberg can prove things about our handshake protocol more
939 - Make directory authorities generate a separate "guard" flag to
940 mean "would make a good entry guard". Clients now honor the
941 is_guard flag rather than looking at is_fast or is_stable.
942 - Try to list MyFamily elements by key, not by nickname, and warn
943 if we've not heard of a server.
944 - Start using RAND_bytes rather than RAND_pseudo_bytes from
945 OpenSSL. Also, reseed our entropy every hour, not just at
946 startup. And add entropy in 512-bit chunks, not 160-bit chunks.
947 - Refuse server descriptors where the fingerprint line doesn't match
948 the included identity key. Tor doesn't care, but other apps (and
949 humans) might actually be trusting the fingerprint line.
950 - We used to kill the circuit when we receive a relay command we
951 don't recognize. Now we just drop that cell.
952 - Fix a bug found by Lasse Overlier: when we were making internal
953 circuits (intended to be cannibalized later for rendezvous and
954 introduction circuits), we were picking them so that they had
955 useful exit nodes. There was no need for this, and it actually
956 aids some statistical attacks.
957 - Start treating internal circuits and exit circuits separately.
958 It's important to keep them separate because internal circuits
959 have their last hops picked like middle hops, rather than like
960 exit hops. So exiting on them will break the user's expectations.
961 - Fix a possible way to DoS dirservers.
962 - When the client asked for a rendezvous port that the hidden
963 service didn't want to provide, we were sending an IP address
964 back along with the end cell. Fortunately, it was zero. But stop
967 o Packaging improvements:
968 - Implement --with-libevent-dir option to ./configure. Improve
969 search techniques to find libevent, and use those for openssl too.
970 - Fix a couple of bugs in OpenSSL detection. Deal better when
971 there are multiple SSLs installed with different versions.
972 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
973 - On non-gcc compilers (e.g. Solaris's cc), use "-g -O" instead of
975 - Make unit tests (and other invocations that aren't the real Tor)
976 run without launching listeners, creating subdirectories, and so on.
977 - The OS X installer was adding a symlink for tor_resolve but
978 the binary was called tor-resolve (reported by Thomas Hardly).
979 - Now we can target arch and OS in rpm builds (contributed by
980 Phobos). Also make the resulting dist-rpm filename match the
982 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
983 if you log to syslog and want something other than LOG_DAEMON.
984 - Fix the torify (tsocks) config file to not use Tor for localhost
986 - Start shipping socks-extensions.txt, tor-doc-unix.html,
987 tor-doc-server.html, and stylesheet.css in the tarball.
988 - Stop shipping tor-doc.html, INSTALL, and README in the tarball.
989 They are useless now.
990 - Add Peter Palfrader's contributed check-tor script. It lets you
991 easily check whether a given server (referenced by nickname)
993 - Add BSD-style contributed startup script "rc.subr" from Peter
996 o Directory improvements -- new directory protocol:
997 - See tor/doc/dir-spec.txt for all the juicy details. Key points:
998 - Authorities and caches publish individual descriptors (by
999 digest, by fingerprint, by "all", and by "tell me yours").
1000 - Clients don't download or use the old directory anymore. Now they
1001 download network-statuses from the directory authorities, and
1002 fetch individual server descriptors as needed from mirrors.
1003 - Clients don't download descriptors of non-running servers.
1004 - Download descriptors by digest, not by fingerprint. Caches try to
1005 download all listed digests from authorities; clients try to
1006 download "best" digests from caches. This avoids partitioning
1007 and isolating attacks better.
1008 - Only upload a new server descriptor when options change, 18
1009 hours have passed, uptime is reset, or bandwidth changes a lot.
1010 - Directory authorities silently throw away new descriptors that
1011 haven't changed much if the timestamps are similar. We do this to
1012 tolerate older Tor servers that upload a new descriptor every 15
1013 minutes. (It seemed like a good idea at the time.)
1014 - Clients choose directory servers from the network status lists,
1015 not from their internal list of router descriptors. Now they can
1016 go to caches directly rather than needing to go to authorities
1017 to bootstrap the first set of descriptors.
1018 - When picking a random directory, prefer non-authorities if any
1020 - Add a new flag to network-status indicating whether the server
1021 can answer v2 directory requests too.
1022 - Directory mirrors now cache up to 16 unrecognized network-status
1023 docs, so new directory authorities will be cached too.
1024 - Stop parsing, storing, or using running-routers output (but
1025 mirrors still cache and serve it).
1026 - Clients consider a threshold of "versioning" directory authorities
1027 before deciding whether to warn the user that he's obsolete.
1028 - Authorities publish separate sorted lists of recommended versions
1029 for clients and for servers.
1030 - Change DirServers config line to note which dirs are v1 authorities.
1031 - Put nicknames on the DirServer line, so we can refer to them
1032 without requiring all our users to memorize their IP addresses.
1033 - Remove option when getting directory cache to see whether they
1034 support running-routers; they all do now. Replace it with one
1035 to see whether caches support v2 stuff.
1036 - Stop listing down or invalid nodes in the v1 directory. This
1037 reduces its bulk by about 1/3, and reduces load on mirrors.
1038 - Mirrors no longer cache the v1 directory as often.
1039 - If we as a directory mirror don't know of any v1 directory
1040 authorities, then don't try to cache any v1 directories.
1042 o Other directory improvements:
1043 - Add lefkada.eecs.harvard.edu and tor.dizum.com as fourth and
1044 fifth authoritative directory servers.
1045 - Directory authorities no longer require an open connection from
1046 a server to consider him "reachable". We need this change because
1047 when we add new directory authorities, old servers won't know not
1049 - Dir authorities now do their own external reachability testing
1050 of each server, and only list as running the ones they found to
1051 be reachable. We also send back warnings to the server's logs if
1052 it uploads a descriptor that we already believe is unreachable.
1053 - Spread the directory authorities' reachability testing over the
1054 entire testing interval, so we don't try to do 500 TLS's at once
1056 - Make the "stable" router flag in network-status be the median of
1057 the uptimes of running valid servers, and make clients pay
1058 attention to the network-status flags. Thus the cutoff adapts
1059 to the stability of the network as a whole, making IRC, IM, etc
1060 connections more reliable.
1061 - Make the v2 dir's "Fast" flag based on relative capacity, just
1062 like "Stable" is based on median uptime. Name everything in the
1063 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
1064 - Retry directory requests if we fail to get an answer we like
1065 from a given dirserver (we were retrying before, but only if
1066 we fail to connect).
1067 - Return a robots.txt on our dirport to discourage google indexing.
1069 o Controller protocol improvements:
1070 - Revised controller protocol (version 1) that uses ascii rather
1071 than binary: tor/doc/control-spec.txt. Add supporting libraries
1072 in python and java and c# so you can use the controller from your
1073 applications without caring how our protocol works.
1074 - Allow the DEBUG controller event to work again. Mark certain log
1075 entries as "don't tell this to controllers", so we avoid cycles.
1076 - New controller function "getinfo accounting", to ask how
1077 many bytes we've used in this time period.
1078 - Add a "resetconf" command so you can set config options like
1079 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
1080 a config option in the torrc with no value, then it clears it
1081 entirely (rather than setting it to its default).
1082 - Add a "getinfo config-file" to tell us where torrc is. Also
1083 expose guard nodes, config options/names.
1084 - Add a "quit" command (when when using the controller manually).
1085 - Add a new signal "newnym" to "change pseudonyms" -- that is, to
1086 stop using any currently-dirty circuits for new streams, so we
1087 don't link new actions to old actions. This also occurs on HUP
1089 - If we would close a stream early (e.g. it asks for a .exit that
1090 we know would refuse it) but the LeaveStreamsUnattached config
1091 option is set by the controller, then don't close it.
1092 - Add a new controller event type "authdir_newdescs" that allows
1093 controllers to get all server descriptors that were uploaded to
1094 a router in its role as directory authority.
1095 - New controller option "getinfo desc/all-recent" to fetch the
1096 latest server descriptor for every router that Tor knows about.
1097 - Fix the controller's "attachstream 0" command to treat conn like
1098 it just connected, doing address remapping, handling .exit and
1099 .onion idioms, and so on. Now we're more uniform in making sure
1100 that the controller hears about new and closing connections.
1101 - Permit transitioning from ORPort==0 to ORPort!=0, and back, from
1102 the controller. Also, rotate dns and cpu workers if the controller
1103 changes options that will affect them; and initialize the dns
1104 worker cache tree whether or not we start out as a server.
1105 - Add a new circuit purpose 'controller' to let the controller ask
1106 for a circuit that Tor won't try to use. Extend the "extendcircuit"
1107 controller command to let you specify the purpose if you're starting
1108 a new circuit. Add a new "setcircuitpurpose" controller command to
1109 let you change a circuit's purpose after it's been created.
1110 - Let the controller ask for "getinfo dir/server/foo" so it can ask
1111 directly rather than connecting to the dir port. "getinfo
1112 dir/status/foo" also works, but currently only if your DirPort
1114 - Let the controller tell us about certain router descriptors
1115 that it doesn't want Tor to use in circuits. Implement
1116 "setrouterpurpose" and modify "+postdescriptor" to do this.
1117 - If the controller's *setconf commands fail, collect an error
1118 message in a string and hand it back to the controller -- don't
1119 just tell them to go read their logs.
1121 o Scalability, resource management, and performance:
1122 - Fix a major load balance bug: we were round-robin reading in 16 KB
1123 chunks, and servers with bandwidthrate of 20 KB, while downloading
1124 a 600 KB directory, would starve their other connections. Now we
1125 try to be a bit more fair.
1126 - Be more conservative about whether to advertise our DirPort.
1127 The main change is to not advertise if we're running at capacity
1128 and either a) we could hibernate ever or b) our capacity is low
1129 and we're using a default DirPort.
1130 - We weren't cannibalizing circuits correctly for
1131 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
1132 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
1133 build those from scratch. This should make hidden services faster.
1134 - Predict required circuits better, with an eye toward making hidden
1135 services faster on the service end.
1136 - Compress exit policies even more: look for duplicate lines and
1138 - Generate 18.0.0.0/8 address policy format in descs when we can;
1139 warn when the mask is not reducible to a bit-prefix.
1140 - There used to be two ways to specify your listening ports in a
1141 server descriptor: on the "router" line and with a separate "ports"
1142 line. Remove support for the "ports" line.
1143 - Reduce memory requirements in our structs by changing the order
1144 of fields. Replace balanced trees with hash tables. Inline
1145 bottleneck smartlist functions. Add a "Map from digest to void*"
1146 abstraction so we can do less hex encoding/decoding, and use it
1147 in router_get_by_digest(). Many other CPU and memory improvements.
1148 - Allow tor_gzip_uncompress to extract as much as possible from
1149 truncated compressed data. Try to extract as many
1150 descriptors as possible from truncated http responses (when
1151 purpose is DIR_PURPOSE_FETCH_ROUTERDESC).
1152 - Make circ->onionskin a pointer, not a static array. moria2 was using
1153 125000 circuit_t's after it had been up for a few weeks, which
1154 translates to 20+ megs of wasted space.
1155 - The private half of our EDH handshake keys are now chosen out
1156 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
1157 - Stop doing the complex voodoo overkill checking for insecure
1158 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
1159 - Do round-robin writes for TLS of at most 16 kB per write. This
1160 might be more fair on loaded Tor servers.
1161 - Do not use unaligned memory access on alpha, mips, or mipsel.
1162 It *works*, but is very slow, so we treat them as if it doesn't.
1164 o Other bugfixes and improvements:
1165 - Start storing useful information to $DATADIR/state, so we can
1166 remember things across invocations of Tor. Retain unrecognized
1167 lines so we can be forward-compatible, and write a TorVersion line
1168 so we can be backward-compatible.
1169 - If ORPort is set, Address is not explicitly set, and our hostname
1170 resolves to a private IP address, try to use an interface address
1171 if it has a public address. Now Windows machines that think of
1172 themselves as localhost can guess their address.
1173 - Regenerate our local descriptor if it's dirty and we try to use
1174 it locally (e.g. if it changes during reachability detection).
1175 This was causing some Tor servers to keep publishing the same
1176 initial descriptor forever.
1177 - Tor servers with dynamic IP addresses were needing to wait 18
1178 hours before they could start doing reachability testing using
1179 the new IP address and ports. This is because they were using
1180 the internal descriptor to learn what to test, yet they were only
1181 rebuilding the descriptor once they decided they were reachable.
1182 - It turns out we couldn't bootstrap a network since we added
1183 reachability detection in 0.1.0.1-rc. Good thing the Tor network
1184 has never gone down. Add an AssumeReachable config option to let
1185 servers and authorities bootstrap. When we're trying to build a
1186 high-uptime or high-bandwidth circuit but there aren't enough
1187 suitable servers, try being less picky rather than simply failing.
1188 - Newly bootstrapped Tor networks couldn't establish hidden service
1189 circuits until they had nodes with high uptime. Be more tolerant.
1190 - Really busy servers were keeping enough circuits open on stable
1191 connections that they were wrapping around the circuit_id
1192 space. (It's only two bytes.) This exposed a bug where we would
1193 feel free to reuse a circuit_id even if it still exists but has
1194 been marked for close. Try to fix this bug. Some bug remains.
1195 - When we fail to bind or listen on an incoming or outgoing
1196 socket, we now close it before refusing, rather than just
1197 leaking it. (Thanks to Peter Palfrader for finding.)
1198 - Fix a file descriptor leak in start_daemon().
1199 - On Windows, you can't always reopen a port right after you've
1200 closed it. So change retry_listeners() to only close and re-open
1201 ports that have changed.
1202 - Workaround a problem with some http proxies that refuse GET
1203 requests that specify "Content-Length: 0". Reported by Adrian.
1204 - Recover better from TCP connections to Tor servers that are
1205 broken but don't tell you (it happens!); and rotate TLS
1206 connections once a week.
1207 - Fix a scary-looking but apparently harmless bug where circuits
1208 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1209 servers, and never switch to state CIRCUIT_STATE_OPEN.
1210 - Check for even more Windows version flags when writing the platform
1211 string in server descriptors, and note any we don't recognize.
1212 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1213 get a better idea of why their circuits failed. Not used yet.
1214 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
1215 We don't use them yet, but maybe one day our DNS resolver will be
1216 able to discover them.
1217 - Let people type "tor --install" as well as "tor -install" when they
1218 want to make it an NT service.
1219 - Looks like we were never delivering deflated (i.e. compressed)
1220 running-routers lists, even when asked. Oops.
1221 - We were leaking some memory every time the client changed IPs.
1222 - Clean up more of the OpenSSL memory when exiting, so we can detect
1223 memory leaks better.
1224 - Never call free() on tor_malloc()d memory. This will help us
1225 use dmalloc to detect memory leaks.
1226 - Some Tor servers process billions of cells per day. These
1227 statistics are now uint64_t's.
1228 - Check [X-]Forwarded-For headers in HTTP requests when generating
1229 log messages. This lets people run dirservers (and caches) behind
1230 Apache but still know which IP addresses are causing warnings.
1231 - Fix minor integer overflow in calculating when we expect to use up
1232 our bandwidth allocation before hibernating.
1233 - Lower the minimum required number of file descriptors to 1000,
1234 so we can have some overhead for Valgrind on Linux, where the
1235 default ulimit -n is 1024.
1236 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
1237 and its existence is confusing some users.
1239 o Config option fixes:
1240 - Add a new config option ExitPolicyRejectPrivate which defaults
1241 to on. Now all exit policies will begin with rejecting private
1242 addresses, unless the server operator explicitly turns it off.
1243 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB.
1244 - Add new ReachableORAddresses and ReachableDirAddresses options
1245 that understand address policies. FascistFirewall is now a synonym
1246 for "ReachableORAddresses *:443", "ReachableDirAddresses *:80".
1247 - Start calling it FooListenAddress rather than FooBindAddress,
1248 since few of our users know what it means to bind an address
1250 - If the user gave Tor an odd number of command-line arguments,
1251 we were silently ignoring the last one. Now we complain and fail.
1252 This wins the oldest-bug prize -- this bug has been present since
1253 November 2002, as released in Tor 0.0.0.
1254 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
1255 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
1256 it would silently ignore the 6668.
1257 - If we get a linelist or linelist_s config option from the torrc,
1258 e.g. ExitPolicy, and it has no value, warn and skip rather than
1259 silently resetting it to its default.
1260 - Setconf was appending items to linelists, not clearing them.
1261 - Add MyFamily to torrc.sample in the server section, so operators
1262 will be more likely to learn that it exists.
1263 - Make ContactInfo mandatory for authoritative directory servers.
1264 - MaxConn has been obsolete for a while now. Document the ConnLimit
1265 config option, which is a *minimum* number of file descriptors
1266 that must be available else Tor refuses to start.
1267 - Get rid of IgnoreVersion undocumented config option, and make us
1268 only warn, never exit, when we're running an obsolete version.
1269 - Make MonthlyAccountingStart config option truly obsolete now.
1270 - Correct the man page entry on TrackHostExitsExpire.
1271 - Let directory authorities start even if they don't specify an
1272 Address config option.
1273 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1274 reflect the updated flags in our v2 dir protocol.
1276 o Config option features:
1277 - Add a new config option FastFirstHopPK (on by default) so clients
1278 do a trivial crypto handshake for their first hop, since TLS has
1279 already taken care of confidentiality and authentication.
1280 - Let the user set ControlListenAddress in the torrc. This can be
1281 dangerous, but there are some cases (like a secured LAN) where it
1283 - New config options to help controllers: FetchServerDescriptors
1284 and FetchHidServDescriptors for whether to fetch server
1285 info and hidserv info or let the controller do it, and
1286 PublishServerDescriptor and PublishHidServDescriptors.
1287 - Also let the controller set the __AllDirActionsPrivate config
1288 option if you want all directory fetches/publishes to happen via
1289 Tor (it assumes your controller bootstraps your circuits).
1290 - Add "HardwareAccel" config option: support for crypto hardware
1291 accelerators via OpenSSL. Off by default, until we find somebody
1292 smart who can test it for us. (It appears to produce seg faults
1293 in at least some cases.)
1294 - New config option "AuthDirRejectUnlisted" for directory authorities
1295 as a panic button: if we get flooded with unusable servers we can
1296 revert to only listing servers in the approved-routers file.
1297 - Directory authorities can now reject/invalidate by key and IP,
1298 with the config options "AuthDirInvalid" and "AuthDirReject", or
1299 by marking a fingerprint as "!reject" or "!invalid" (as its
1300 nickname) in the approved-routers file. This is useful since
1301 currently we automatically list servers as running and usable
1302 even if we know they're jerks.
1303 - Add a new config option TestSocks so people can see whether their
1304 applications are using socks4, socks4a, socks5-with-ip, or
1305 socks5-with-fqdn. This way they don't have to keep mucking
1306 with tcpdump and wondering if something got cached somewhere.
1307 - Add "private:*" as an alias in configuration for policies. Now
1308 you can simplify your exit policy rather than needing to list
1309 every single internal or nonroutable network space.
1310 - Accept "private:*" in routerdesc exit policies; not generated yet
1311 because older Tors do not understand it.
1312 - Add configuration option "V1AuthoritativeDirectory 1" which
1313 moria1, moria2, and tor26 have set.
1314 - Implement an option, VirtualAddrMask, to set which addresses
1315 get handed out in response to mapaddress requests. This works
1316 around a bug in tsocks where 127.0.0.0/8 is never socksified.
1317 - Add a new config option FetchUselessDescriptors, off by default,
1318 for when you plan to run "exitlist" on your client and you want
1319 to know about even the non-running descriptors.
1320 - SocksTimeout: How long do we let a socks connection wait
1321 unattached before we fail it?
1322 - CircuitBuildTimeout: Cull non-open circuits that were born
1323 at least this many seconds ago.
1324 - CircuitIdleTimeout: Cull open clean circuits that were born
1325 at least this many seconds ago.
1326 - New config option SafeSocks to reject all application connections
1327 using unsafe socks protocols. Defaults to off.
1329 o Improved and clearer log messages:
1330 - Reduce clutter in server logs. We're going to try to make
1331 them actually usable now. New config option ProtocolWarnings that
1332 lets you hear about how _other Tors_ are breaking the protocol. Off
1334 - Divide log messages into logging domains. Once we put some sort
1335 of interface on this, it will let people looking at more verbose
1336 log levels specify the topics they want to hear more about.
1337 - Log server fingerprint on startup, so new server operators don't
1338 have to go hunting around their filesystem for it.
1339 - Provide dire warnings to any users who set DirServer manually;
1340 move it out of torrc.sample and into torrc.complete.
1341 - Make the log message less scary when all the dirservers are
1342 temporarily unreachable.
1343 - When tor_socketpair() fails in Windows, give a reasonable
1344 Windows-style errno back.
1345 - Improve tor_gettimeofday() granularity on windows.
1346 - We were printing the number of idle dns workers incorrectly when
1348 - Handle duplicate lines in approved-routers files without warning.
1349 - We were whining about using socks4 or socks5-with-local-lookup
1350 even when it's an IP address in the "virtual" range we designed
1351 exactly for this case.
1352 - Check for named servers when looking them up by nickname;
1353 warn when we're calling a non-named server by its nickname;
1354 don't warn twice about the same name.
1355 - Downgrade the dirserver log messages when whining about
1357 - Correct "your server is reachable" log entries to indicate that
1358 it was self-testing that told us so.
1359 - If we're trying to be a Tor server and running Windows 95/98/ME
1360 as a server, explain that we'll likely crash.
1361 - Provide a more useful warn message when our onion queue gets full:
1362 the CPU is too slow or the exit policy is too liberal.
1363 - Don't warn when we receive a 503 from a dirserver/cache -- this
1364 will pave the way for them being able to refuse if they're busy.
1365 - When we fail to bind a listener, try to provide a more useful
1366 log message: e.g., "Is Tor already running?"
1367 - Only start testing reachability once we've established a
1368 circuit. This will make startup on dir authorities less noisy.
1369 - Don't try to upload hidden service descriptors until we have
1370 established a circuit.
1371 - Tor didn't warn when it failed to open a log file.
1372 - Warn when listening on a public address for socks. We suspect a
1373 lot of people are setting themselves up as open socks proxies,
1374 and they have no idea that jerks on the Internet are using them,
1375 since they simply proxy the traffic into the Tor network.
1376 - Give a useful message when people run Tor as the wrong user,
1377 rather than telling them to start chowning random directories.
1378 - Fix a harmless bug that was causing Tor servers to log
1379 "Got an end because of misc error, but we're not an AP. Closing."
1380 - Fix wrong log message when you add a "HiddenServiceNodes" config
1381 line without any HiddenServiceDir line (reported by Chris Thomas).
1382 - Directory authorities now stop whining so loudly about bad
1383 descriptors that they fetch from other dirservers. So when there's
1384 a log complaint, it's for sure from a freshly uploaded descriptor.
1385 - When logging via syslog, include the pid whenever we provide
1386 a log entry. Suggested by Todd Fries.
1387 - When we're shutting down and we do something like try to post a
1388 server descriptor or rendezvous descriptor, don't complain that
1389 we seem to be unreachable. Of course we are, we're shutting down.
1390 - Change log line for unreachability to explicitly suggest /etc/hosts
1391 as the culprit. Also make it clearer what IP address and ports we're
1392 testing for reachability.
1393 - Put quotes around user-supplied strings when logging so users are
1394 more likely to realize if they add bad characters (like quotes)
1396 - NT service patch from Matt Edman to improve error messages on Win32.
1399 Changes in version 0.1.0.17 - 2006-02-17
1400 o Crash bugfixes on 0.1.0.x:
1401 - When servers with a non-zero DirPort came out of hibernation,
1402 sometimes they would trigger an assert.
1404 o Other important bugfixes:
1405 - On platforms that don't have getrlimit (like Windows), we were
1406 artificially constraining ourselves to a max of 1024
1407 connections. Now just assume that we can handle as many as 15000
1408 connections. Hopefully this won't cause other problems.
1410 o Backported features:
1411 - When we're a server, a client asks for an old-style directory,
1412 and our write bucket is empty, don't give it to him. This way
1413 small servers can continue to serve the directory *sometimes*,
1414 without getting overloaded.
1415 - Whenever you get a 503 in response to a directory fetch, try
1416 once more. This will become important once servers start sending
1417 503's whenever they feel busy.
1418 - Fetch a new directory every 120 minutes, not every 40 minutes.
1419 Now that we have hundreds of thousands of users running the old
1420 directory algorithm, it's starting to hurt a lot.
1421 - Bump up the period for forcing a hidden service descriptor upload
1422 from 20 minutes to 1 hour.
1425 Changes in version 0.1.0.16 - 2006-01-02
1426 o Crash bugfixes on 0.1.0.x:
1427 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1428 corrupting the heap, losing FDs, or crashing when we need to resize
1429 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1430 - It turns out sparc64 platforms crash on unaligned memory access
1431 too -- so detect and avoid this.
1432 - Handle truncated compressed data correctly (by detecting it and
1434 - Fix possible-but-unlikely free(NULL) in control.c.
1435 - When we were closing connections, there was a rare case that
1436 stomped on memory, triggering seg faults and asserts.
1437 - Avoid potential infinite recursion when building a descriptor. (We
1438 don't know that it ever happened, but better to fix it anyway.)
1439 - We were neglecting to unlink marked circuits from soon-to-close OR
1440 connections, which caused some rare scribbling on freed memory.
1441 - Fix a memory stomping race bug when closing the joining point of two
1442 rendezvous circuits.
1443 - Fix an assert in time parsing found by Steven Murdoch.
1445 o Other bugfixes on 0.1.0.x:
1446 - When we're doing reachability testing, provide more useful log
1447 messages so the operator knows what to expect.
1448 - Do not check whether DirPort is reachable when we are suppressing
1449 advertising it because of hibernation.
1450 - When building with -static or on Solaris, we sometimes needed -ldl.
1451 - One of the dirservers (tor26) changed its IP address.
1452 - When we're deciding whether a stream has enough circuits around
1453 that can handle it, count the freshly dirty ones and not the ones
1454 that are so dirty they won't be able to handle it.
1455 - When we're expiring old circuits, we had a logic error that caused
1456 us to close new rendezvous circuits rather than old ones.
1457 - Give a more helpful log message when you try to change ORPort via
1458 the controller: you should upgrade Tor if you want that to work.
1459 - We were failing to parse Tor versions that start with "Tor ".
1460 - Tolerate faulty streams better: when a stream fails for reason
1461 exitpolicy, stop assuming that the router is lying about his exit
1462 policy. When a stream fails for reason misc, allow it to retry just
1463 as if it was resolvefailed. When a stream has failed three times,
1464 reset its failure count so we can try again and get all three tries.
1467 Changes in version 0.1.0.15 - 2005-09-23
1468 o Bugfixes on 0.1.0.x:
1469 - Reject ports 465 and 587 (spam targets) in default exit policy.
1470 - Don't crash when we don't have any spare file descriptors and we
1471 try to spawn a dns or cpu worker.
1472 - Get rid of IgnoreVersion undocumented config option, and make us
1473 only warn, never exit, when we're running an obsolete version.
1474 - Don't try to print a null string when your server finds itself to
1475 be unreachable and the Address config option is empty.
1476 - Make the numbers in read-history and write-history into uint64s,
1477 so they don't overflow and publish negatives in the descriptor.
1478 - Fix a minor memory leak in smartlist_string_remove().
1479 - We were only allowing ourselves to upload a server descriptor at
1480 most every 20 minutes, even if it changed earlier than that.
1481 - Clean up log entries that pointed to old URLs.
1484 Changes in version 0.1.0.14 - 2005-08-08
1485 o Bugfixes on 0.1.0.x:
1486 - Fix the other half of the bug with crypto handshakes
1488 - Fix an assert trigger if you send a 'signal term' via the
1489 controller when it's listening for 'event info' messages.
1492 Changes in version 0.1.0.13 - 2005-08-04
1493 o Bugfixes on 0.1.0.x:
1494 - Fix a critical bug in the security of our crypto handshakes.
1495 - Fix a size_t underflow in smartlist_join_strings2() that made
1496 it do bad things when you hand it an empty smartlist.
1497 - Fix Windows installer to ship Tor license (thanks to Aphex for
1498 pointing out this oversight) and put a link to the doc directory
1500 - Explicitly set no-unaligned-access for sparc: it turns out the
1501 new gcc's let you compile broken code, but that doesn't make it
1505 Changes in version 0.1.0.12 - 2005-07-18
1506 o New directory servers:
1507 - tor26 has changed IP address.
1509 o Bugfixes on 0.1.0.x:
1510 - Fix a possible double-free in tor_gzip_uncompress().
1511 - When --disable-threads is set, do not search for or link against
1513 - Don't trigger an assert if an authoritative directory server
1514 claims its dirport is 0.
1515 - Fix bug with removing Tor as an NT service: some people were
1516 getting "The service did not return an error." Thanks to Matt
1520 Changes in version 0.1.0.11 - 2005-06-30
1521 o Bugfixes on 0.1.0.x:
1522 - Fix major security bug: servers were disregarding their
1523 exit policies if clients behaved unexpectedly.
1524 - Make OS X init script check for missing argument, so we don't
1525 confuse users who invoke it incorrectly.
1526 - Fix a seg fault in "tor --hash-password foo".
1527 - The MAPADDRESS control command was broken.
1530 Changes in version 0.1.0.10 - 2005-06-14
1532 - Make NT services work and start on startup on Win32 (based on
1533 patch by Matt Edman). See the FAQ entry for details.
1534 - Make 'platform' string in descriptor more accurate for Win32
1535 servers, so it's not just "unknown platform".
1536 - REUSEADDR on normal platforms means you can rebind to the port
1537 right after somebody else has let it go. But REUSEADDR on Win32
1538 means you can bind to the port _even when somebody else already
1539 has it bound_! So, don't do that on Win32.
1540 - Clean up the log messages when starting on Win32 with no config
1542 - Allow seeding the RNG on Win32 even when you're not running as
1543 Administrator. If seeding the RNG on Win32 fails, quit.
1545 o Assert / crash bugs:
1546 - Refuse relay cells that claim to have a length larger than the
1547 maximum allowed. This prevents a potential attack that could read
1548 arbitrary memory (e.g. keys) from an exit server's process
1550 - If unofficial Tor clients connect and send weird TLS certs, our
1551 Tor server triggers an assert. Stop asserting, and start handling
1552 TLS errors better in other situations too.
1553 - Fix a race condition that can trigger an assert when we have a
1554 pending create cell and an OR connection attempt fails.
1557 - Use pthreads for worker processes rather than forking. This was
1558 forced because when we forked, we ended up wasting a lot of
1559 duplicate ram over time.
1560 - Also switch to foo_r versions of some library calls to allow
1561 reentry and threadsafeness.
1562 - Implement --disable-threads configure option. Disable threads on
1563 netbsd and openbsd by default, because they have no reentrant
1564 resolver functions (!), and on solaris since it has other
1566 - Fix possible bug on threading platforms (e.g. win32) which was
1567 leaking a file descriptor whenever a cpuworker or dnsworker died.
1568 - Fix a minor memory leak when somebody establishes an introduction
1569 point at your Tor server.
1570 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1572 - Add ./configure --with-dmalloc option, to track memory leaks.
1573 - And try to free all memory on closing, so we can detect what
1576 o Protocol correctness:
1577 - When we've connected to an OR and handshaked but didn't like
1578 the result, we were closing the conn without sending destroy
1579 cells back for pending circuits. Now send those destroys.
1580 - Start sending 'truncated' cells back rather than destroy cells
1581 if the circuit closes in front of you. This means we won't have
1582 to abandon partially built circuits.
1583 - Handle changed router status correctly when dirserver reloads
1584 fingerprint file. We used to be dropping all unverified descriptors
1585 right then. The bug was hidden because we would immediately
1586 fetch a directory from another dirserver, which would include the
1587 descriptors we just dropped.
1588 - Revise tor-spec to add more/better stream end reasons.
1589 - Revise all calls to connection_edge_end to avoid sending 'misc',
1590 and to take errno into account where possible.
1591 - Client now retries when streams end early for 'hibernating' or
1592 'resource limit' reasons, rather than failing them.
1593 - Try to be more zealous about calling connection_edge_end when
1594 things go bad with edge conns in connection.c.
1596 o Robustness improvements:
1597 - Better handling for heterogeneous / unreliable nodes:
1598 - Annotate circuits with whether they aim to contain high uptime
1599 nodes and/or high capacity nodes. When building circuits, choose
1601 - This means that every single node in an intro rend circuit,
1602 not just the last one, will have a minimum uptime.
1603 - New config option LongLivedPorts to indicate application streams
1604 that will want high uptime circuits.
1605 - Servers reset uptime when a dir fetch entirely fails. This
1606 hopefully reflects stability of the server's network connectivity.
1607 - If somebody starts his tor server in Jan 2004 and then fixes his
1608 clock, don't make his published uptime be a year.
1609 - Reset published uptime when we wake up from hibernation.
1610 - Introduce a notion of 'internal' circs, which are chosen without
1611 regard to the exit policy of the last hop. Intro and rendezvous
1612 circs must be internal circs, to avoid leaking information. Resolve
1613 and connect streams can use internal circs if they want.
1614 - New circuit pooling algorithm: keep track of what destination ports
1615 we've used recently (start out assuming we'll want to use 80), and
1616 make sure to have enough circs around to satisfy these ports. Also
1617 make sure to have 2 internal circs around if we've required internal
1618 circs lately (and with high uptime if we've seen that lately too).
1619 - Turn addr_policy_compare from a tristate to a quadstate; this should
1620 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1621 for google.com" problem.
1622 - When a client asks us for a dir mirror and we don't have one,
1623 launch an attempt to get a fresh one.
1624 - First cut at support for "create-fast" cells. Clients can use
1625 these when extending to their first hop, since the TLS already
1626 provides forward secrecy and authentication. Not enabled on
1629 o Reachability testing.
1630 - Your Tor server will automatically try to see if its ORPort and
1631 DirPort are reachable from the outside, and it won't upload its
1632 descriptor until it decides at least ORPort is reachable (when
1633 DirPort is not yet found reachable, publish it as zero).
1634 - When building testing circs for ORPort testing, use only
1635 high-bandwidth nodes, so fewer circuits fail.
1636 - Notice when our IP changes, and reset stats/uptime/reachability.
1637 - Authdirservers don't do ORPort reachability detection, since
1638 they're in clique mode, so it will be rare to find a server not
1639 already connected to them.
1640 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1644 - Now we allow two unverified servers with the same nickname
1645 but different keys. But if a nickname is verified, only that
1646 nickname+key are allowed.
1647 - If you're an authdirserver connecting to an address:port,
1648 and it's not the OR you were expecting, forget about that
1649 descriptor. If he *was* the one you were expecting, then forget
1650 about all other descriptors for that address:port.
1651 - Allow servers to publish descriptors from 12 hours in the future.
1652 Corollary: only whine about clock skew from the dirserver if
1653 he's a trusted dirserver (since now even verified servers could
1654 have quite wrong clocks).
1655 - Require servers that use the default dirservers to have public IP
1656 addresses. We have too many servers that are configured with private
1657 IPs and their admins never notice the log entries complaining that
1658 their descriptors are being rejected.
1660 o Efficiency improvements:
1661 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1662 and /dev/poll), and hopefully work better on Windows too.
1663 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1664 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1665 - Find libevent even if it's hiding in /usr/local/ and your
1666 CFLAGS and LDFLAGS don't tell you to look there.
1667 - Be able to link with libevent as a shared library (the default
1668 after 1.0d), even if it's hiding in /usr/local/lib and even
1669 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1670 assuming you're running gcc. Otherwise fail and give a useful
1672 - Switch to a new buffer management algorithm, which tries to avoid
1673 reallocing and copying quite as much. In first tests it looks like
1674 it uses *more* memory on average, but less cpu.
1675 - Switch our internal buffers implementation to use a ring buffer,
1676 to hopefully improve performance for fast servers a lot.
1677 - Reenable the part of the code that tries to flush as soon as an
1678 OR outbuf has a full TLS record available. Perhaps this will make
1679 OR outbufs not grow as huge except in rare cases, thus saving lots
1680 of CPU time plus memory.
1681 - Improve performance for dirservers: stop re-parsing the whole
1682 directory every time you regenerate it.
1683 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1684 it much faster to look up a circuit for each relay cell.
1685 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1686 since they're eating our cpu on exit nodes.
1687 - Stop wasting time doing a case insensitive comparison for every
1688 dns name every time we do any lookup. Canonicalize the names to
1689 lowercase when you first see them.
1692 - Handle unavailable hidden services better. Handle slow or busy
1693 hidden services better.
1694 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1695 circ as necessary, if there are any completed ones lying around
1696 when we try to launch one.
1697 - Make hidden services try to establish a rendezvous for 30 seconds
1698 after fetching the descriptor, rather than for n (where n=3)
1699 attempts to build a circuit.
1700 - Adjust maximum skew and age for rendezvous descriptors: let skew
1701 be 48 hours rather than 90 minutes.
1702 - Reject malformed .onion addresses rather then passing them on as
1703 normal web requests.
1706 - More Tor controller support. See
1707 http://tor.eff.org/doc/control-spec.txt for all the new features,
1708 including signals to emulate unix signals from any platform;
1709 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1710 closestream; closecircuit; etc.
1711 - Encode hashed controller passwords in hex instead of base64,
1712 to make it easier to write controllers.
1713 - Revise control spec and implementation to allow all log messages to
1714 be sent to controller with their severities intact (suggested by
1715 Matt Edman). Disable debug-level logs while delivering a debug-level
1716 log to the controller, to prevent loop. Update TorControl to handle
1717 new log event types.
1719 o New config options/defaults:
1720 - Begin scrubbing sensitive strings from logs by default. Turn off
1721 the config option SafeLogging if you need to do debugging.
1722 - New exit policy: accept most low-numbered ports, rather than
1723 rejecting most low-numbered ports.
1724 - Put a note in the torrc about abuse potential with the default
1726 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1728 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1729 based on patch from Adam Langley (basic auth only).
1730 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1731 the fast servers that have been joining lately. (Clients are now
1732 willing to load balance over up to 2 MB of advertised bandwidth
1734 - New config option MaxAdvertisedBandwidth which lets you advertise
1735 a low bandwidthrate (to not attract as many circuits) while still
1736 allowing a higher bandwidthrate in reality.
1737 - Require BandwidthRate to be at least 20kB/s for servers.
1738 - Add a NoPublish config option, so you can be a server (e.g. for
1739 testing running Tor servers in other Tor networks) without
1740 publishing your descriptor to the primary dirservers.
1741 - Add a new AddressMap config directive to rewrite incoming socks
1742 addresses. This lets you, for example, declare an implicit
1743 required exit node for certain sites.
1744 - Add a new TrackHostExits config directive to trigger addressmaps
1745 for certain incoming socks addresses -- for sites that break when
1746 your exit keeps changing (based on patch from Mike Perry).
1747 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1748 which describes how often we retry making new circuits if current
1749 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1750 how long we're willing to make use of an already-dirty circuit.
1751 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1752 a config option "ShutdownWaitLength" (when using kill -INT on
1754 - Fix an edge case in parsing config options: if they say "--"
1755 on the commandline, it's not a config option (thanks weasel).
1756 - New config option DirAllowPrivateAddresses for authdirservers.
1757 Now by default they refuse router descriptors that have non-IP or
1758 private-IP addresses.
1759 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1760 smart" default value: low for servers and high for clients.
1761 - Some people were putting "Address " in their torrc, and they had
1762 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1763 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1764 LOCALSTATEDIR/tor instead.
1765 - Implement --verify-config command-line option to check if your torrc
1766 is valid without actually launching Tor.
1768 o Logging improvements:
1769 - When dirservers refuse a server descriptor, we now log its
1770 contactinfo, platform, and the poster's IP address.
1771 - Only warn once per nickname from add_nickname_list_to_smartlist()
1772 per failure, so an entrynode or exitnode choice that's down won't
1774 - When we're connecting to an OR and he's got a different nickname/key
1775 than we were expecting, only complain loudly if we're an OP or a
1776 dirserver. Complaining loudly to the OR admins just confuses them.
1777 - Whine at you if you're a server and you don't set your contactinfo.
1778 - Warn when exit policy implicitly allows local addresses.
1779 - Give a better warning when some other server advertises an
1780 ORPort that is actually an apache running ssl.
1781 - If we get an incredibly skewed timestamp from a dirserver mirror
1782 that isn't a verified OR, don't warn -- it's probably him that's
1784 - When a dirserver causes you to give a warn, mention which dirserver
1786 - Initialize libevent later in the startup process, so the logs are
1787 already established by the time we start logging libevent warns.
1788 - Use correct errno on win32 if libevent fails.
1789 - Check and warn about known-bad/slow libevent versions.
1790 - Stop warning about sigpipes in the logs. We're going to
1791 pretend that getting these occassionally is normal and fine.
1793 o New contrib scripts:
1794 - New experimental script tor/contrib/exitlist: a simple python
1795 script to parse directories and find Tor nodes that exit to listed
1797 - New experimental script tor/contrib/ExerciseServer.py (needs more
1798 work) that uses the controller interface to build circuits and
1799 fetch pages over them. This will help us bootstrap servers that
1800 have lots of capacity but haven't noticed it yet.
1801 - New experimental script tor/contrib/PathDemo.py (needs more work)
1802 that uses the controller interface to let you choose whole paths
1804 "<hostname>.<path,separated by dots>.<length of path>.path"
1805 - New contributed script "privoxy-tor-toggle" to toggle whether
1806 Privoxy uses Tor. Seems to be configured for Debian by default.
1807 - Have torctl.in/tor.sh.in check for location of su binary (needed
1811 - chdir() to your datadirectory at the *end* of the daemonize process,
1812 not the beginning. This was a problem because the first time you
1813 run tor, if your datadir isn't there, and you have runasdaemon set
1814 to 1, it will try to chdir to it before it tries to create it. Oops.
1815 - Fix several double-mark-for-close bugs, e.g. where we were finding
1816 a conn for a cell even if that conn is already marked for close.
1817 - Stop most cases of hanging up on a socks connection without sending
1819 - Fix a bug in the RPM package: set home directory for _tor to
1820 something more reasonable when first installing.
1821 - Stop putting nodename in the Platform string in server descriptors.
1822 It doesn't actually help, and it is confusing/upsetting some people.
1823 - When using preferred entry or exit nodes, ignore whether the
1824 circuit wants uptime or capacity. They asked for the nodes, they
1826 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1827 artificially capped at 500kB.
1828 - Cache local dns resolves correctly even when they're .exit
1830 - If we're hibernating and we get a SIGINT, exit immediately.
1831 - tor-resolve requests were ignoring .exit if there was a working circuit
1832 they could use instead.
1833 - Pay more attention to the ClientOnly config option.
1834 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1835 installer screens; and don't put stuff into StartupItems unless
1836 the user asks you to.
1839 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1840 rather than just rejecting it.
1841 - If our clock jumps forward by 100 seconds or more, assume something
1842 has gone wrong with our network and abandon all not-yet-used circs.
1843 - When an application is using socks5, give him the whole variety of
1844 potential socks5 responses (connect refused, host unreachable, etc),
1845 rather than just "success" or "failure".
1846 - A more sane version numbering system. See
1847 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1848 - Change version parsing logic: a version is "obsolete" if it is not
1849 recommended and (1) there is a newer recommended version in the
1850 same series, or (2) there are no recommended versions in the same
1851 series, but there are some recommended versions in a newer series.
1852 A version is "new" if it is newer than any recommended version in
1854 - Report HTTP reasons to client when getting a response from directory
1855 servers -- so you can actually know what went wrong.
1856 - Reject odd-looking addresses at the client (e.g. addresses that
1857 contain a colon), rather than having the server drop them because
1859 - Stop publishing socksport in the directory, since it's not
1860 actually meant to be public. For compatibility, publish a 0 there
1862 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1863 cookies to disk and doesn't log each web request to disk. (Thanks
1864 to Brett Carrington for pointing this out.)
1865 - Add OSX uninstall instructions. An actual uninstall script will
1867 - Add "opt hibernating 1" to server descriptor to make it clearer
1868 whether the server is hibernating.
1871 Changes in version 0.0.9.10 - 2005-06-16
1872 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1873 - Refuse relay cells that claim to have a length larger than the
1874 maximum allowed. This prevents a potential attack that could read
1875 arbitrary memory (e.g. keys) from an exit server's process
1879 Changes in version 0.0.9.9 - 2005-04-23
1880 o Bugfixes on 0.0.9.x:
1881 - If unofficial Tor clients connect and send weird TLS certs, our
1882 Tor server triggers an assert. This release contains a minimal
1883 backport from the broader fix that we put into 0.1.0.4-rc.
1886 Changes in version 0.0.9.8 - 2005-04-07
1887 o Bugfixes on 0.0.9.x:
1888 - We have a bug that I haven't found yet. Sometimes, very rarely,
1889 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1890 thinks of itself as idle. This meant that no new circuits ever got
1891 established. Here's a workaround to kill any cpuworker that's been
1892 busy for more than 100 seconds.
1895 Changes in version 0.0.9.7 - 2005-04-01
1896 o Bugfixes on 0.0.9.x:
1897 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1898 - Compare identity to identity, not to nickname, when extending to
1899 a router not already in the directory. This was preventing us from
1900 extending to unknown routers. Oops.
1901 - Make sure to create OS X Tor user in <500 range, so we aren't
1902 creating actual system users.
1903 - Note where connection-that-hasn't-sent-end was marked, and fix
1904 a few really loud instances of this harmless bug (it's fixed more
1908 Changes in version 0.0.9.6 - 2005-03-24
1909 o Bugfixes on 0.0.9.x (crashes and asserts):
1910 - Add new end stream reasons to maintainance branch. Fix bug where
1911 reason (8) could trigger an assert. Prevent bug from recurring.
1912 - Apparently win32 stat wants paths to not end with a slash.
1913 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1914 blowing away the circuit that conn->cpath_layer points to, then
1915 checking to see if the circ is well-formed. Backport check to make
1916 sure we dont use the cpath on a closed connection.
1917 - Prevent circuit_resume_edge_reading_helper() from trying to package
1918 inbufs for marked-for-close streams.
1919 - Don't crash on hup if your options->address has become unresolvable.
1920 - Some systems (like OS X) sometimes accept() a connection and tell
1921 you the remote host is 0.0.0.0:0. If this happens, due to some
1922 other mis-features, we get confused; so refuse the conn for now.
1924 o Bugfixes on 0.0.9.x (other):
1925 - Fix harmless but scary "Unrecognized content encoding" warn message.
1926 - Add new stream error reason: TORPROTOCOL reason means "you are not
1927 speaking a version of Tor I understand; say bye-bye to your stream."
1928 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1929 into the future, now that we are more tolerant of skew. This
1930 resolves a bug where a Tor server would refuse to cache a directory
1931 because all the directories it gets are too far in the future;
1932 yet the Tor server never logs any complaints about clock skew.
1933 - Mac packaging magic: make man pages useable, and do not overwrite
1934 existing torrc files.
1935 - Make OS X log happily to /var/log/tor/tor.log
1938 Changes in version 0.0.9.5 - 2005-02-22
1939 o Bugfixes on 0.0.9.x:
1940 - Fix an assert race at exit nodes when resolve requests fail.
1941 - Stop picking unverified dir mirrors--it only leads to misery.
1942 - Patch from Matt Edman to make NT services work better. Service
1943 support is still not compiled into the executable by default.
1944 - Patch from Dmitri Bely so the Tor service runs better under
1945 the win32 SYSTEM account.
1946 - Make tor-resolve actually work (?) on Win32.
1947 - Fix a sign bug when getrlimit claims to have 4+ billion
1948 file descriptors available.
1949 - Stop refusing to start when bandwidthburst == bandwidthrate.
1950 - When create cells have been on the onion queue more than five
1951 seconds, just send back a destroy and take them off the list.
1954 Changes in version 0.0.9.4 - 2005-02-03
1955 o Bugfixes on 0.0.9:
1956 - Fix an assert bug that took down most of our servers: when
1957 a server claims to have 1 GB of bandwidthburst, don't
1959 - Don't crash as badly if we have spawned the max allowed number
1960 of dnsworkers, or we're out of file descriptors.
1961 - Block more file-sharing ports in the default exit policy.
1962 - MaxConn is now automatically set to the hard limit of max
1963 file descriptors we're allowed (ulimit -n), minus a few for
1965 - Give a clearer message when servers need to raise their
1966 ulimit -n when they start running out of file descriptors.
1967 - SGI Compatibility patches from Jan Schaumann.
1968 - Tolerate a corrupt cached directory better.
1969 - When a dirserver hasn't approved your server, list which one.
1970 - Go into soft hibernation after 95% of the bandwidth is used,
1971 not 99%. This is especially important for daily hibernators who
1972 have a small accounting max. Hopefully it will result in fewer
1973 cut connections when the hard hibernation starts.
1974 - Load-balance better when using servers that claim more than
1975 800kB/s of capacity.
1976 - Make NT services work (experimental, only used if compiled in).
1979 Changes in version 0.0.9.3 - 2005-01-21
1980 o Bugfixes on 0.0.9:
1981 - Backport the cpu use fixes from main branch, so busy servers won't
1982 need as much processor time.
1983 - Work better when we go offline and then come back, or when we
1984 run Tor at boot before the network is up. We do this by
1985 optimistically trying to fetch a new directory whenever an
1986 application request comes in and we think we're offline -- the
1987 human is hopefully a good measure of when the network is back.
1988 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1989 long as you keep using them; actually publish hidserv descriptors
1990 shortly after they change, rather than waiting 20-40 minutes.
1991 - Enable Mac startup script by default.
1992 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1993 - When you update AllowUnverifiedNodes or FirewallPorts via the
1994 controller's setconf feature, we were always appending, never
1996 - When you update HiddenServiceDir via setconf, it was screwing up
1997 the order of reading the lines, making it fail.
1998 - Do not rewrite a cached directory back to the cache; otherwise we
1999 will think it is recent and not fetch a newer one on startup.
2000 - Workaround for webservers that lie about Content-Encoding: Tor
2001 now tries to autodetect compressed directories and compression
2002 itself. This lets us Proxypass dir fetches through apache.
2005 Changes in version 0.0.9.2 - 2005-01-04
2006 o Bugfixes on 0.0.9 (crashes and asserts):
2007 - Fix an assert on startup when the disk is full and you're logging
2009 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
2010 style address, then we'd crash.
2011 - Fix an assert trigger when the running-routers string we get from
2012 a dirserver is broken.
2013 - Make worker threads start and run on win32. Now win32 servers
2015 - Bandaid (not actually fix, but now it doesn't crash) an assert
2016 where the dns worker dies mysteriously and the main Tor process
2017 doesn't remember anything about the address it was resolving.
2019 o Bugfixes on 0.0.9 (Win32):
2020 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
2021 name out of the warning/assert messages.
2022 - Fix a superficial "unhandled error on read" bug on win32.
2023 - The win32 installer no longer requires a click-through for our
2024 license, since our Free Software license grants rights but does not
2026 - Win32: When connecting to a dirserver fails, try another one
2027 immediately. (This was already working for non-win32 Tors.)
2028 - Stop trying to parse $HOME on win32 when hunting for default
2030 - Make tor-resolve.c work on win32 by calling network_init().
2032 o Bugfixes on 0.0.9 (other):
2033 - Make 0.0.9.x build on Solaris again.
2034 - Due to a fencepost error, we were blowing away the \n when reporting
2035 confvalue items in the controller. So asking for multiple config
2036 values at once couldn't work.
2037 - When listing circuits that are pending on an opening OR connection,
2038 if we're an OR we were listing circuits that *end* at us as
2039 being pending on every listener, dns/cpu worker, etc. Stop that.
2040 - Dirservers were failing to create 'running-routers' or 'directory'
2041 strings if we had more than some threshold of routers. Fix them so
2042 they can handle any number of routers.
2043 - Fix a superficial "Duplicate mark for close" bug.
2044 - Stop checking for clock skew for OR connections, even for servers.
2045 - Fix a fencepost error that was chopping off the last letter of any
2046 nickname that is the maximum allowed nickname length.
2047 - Update URLs in log messages so they point to the new website.
2048 - Fix a potential problem in mangling server private keys while
2049 writing to disk (not triggered yet, as far as we know).
2050 - Include the licenses for other free software we include in Tor,
2051 now that we're shipping binary distributions more regularly.
2054 Changes in version 0.0.9.1 - 2004-12-15
2055 o Bugfixes on 0.0.9:
2056 - Make hibernation actually work.
2057 - Make HashedControlPassword config option work.
2058 - When we're reporting event circuit status to a controller,
2059 don't use the stream status code.
2062 Changes in version 0.0.9 - 2004-12-12
2063 o Bugfixes on 0.0.8.1 (Crashes and asserts):
2064 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
2065 write() call will fail and we handle it there.
2066 - When we run out of disk space, or other log writing error, don't
2067 crash. Just stop logging to that log and continue.
2068 - Fix isspace() and friends so they still make Solaris happy
2069 but also so they don't trigger asserts on win32.
2070 - Fix assert failure on malformed socks4a requests.
2071 - Fix an assert bug where a hidden service provider would fail if
2072 the first hop of his rendezvous circuit was down.
2073 - Better handling of size_t vs int, so we're more robust on 64
2076 o Bugfixes on 0.0.8.1 (Win32):
2077 - Make windows sockets actually non-blocking (oops), and handle
2078 win32 socket errors better.
2079 - Fix parse_iso_time on platforms without strptime (eg win32).
2080 - win32: when being multithreaded, leave parent fdarray open.
2081 - Better handling of winsock includes on non-MSV win32 compilers.
2082 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
2084 - Make unit tests work on win32.
2086 o Bugfixes on 0.0.8.1 (Path selection and streams):
2087 - Calculate timeout for waiting for a connected cell from the time
2088 we sent the begin cell, not from the time the stream started. If
2089 it took a long time to establish the circuit, we would time out
2090 right after sending the begin cell.
2091 - Fix router_compare_addr_to_addr_policy: it was not treating a port
2092 of * as always matching, so we were picking reject *:* nodes as
2093 exit nodes too. Oops.
2094 - When read() failed on a stream, we would close it without sending
2095 back an end. So 'connection refused' would simply be ignored and
2096 the user would get no response.
2097 - Stop a sigpipe: when an 'end' cell races with eof from the app,
2098 we shouldn't hold-open-until-flush if the eof arrived first.
2099 - Let resolve conns retry/expire also, rather than sticking around
2101 - Fix more dns related bugs: send back resolve_failed and end cells
2102 more reliably when the resolve fails, rather than closing the
2103 circuit and then trying to send the cell. Also attach dummy resolve
2104 connections to a circuit *before* calling dns_resolve(), to fix
2105 a bug where cached answers would never be sent in RESOLVED cells.
2107 o Bugfixes on 0.0.8.1 (Circuits):
2108 - Finally fix a bug that's been plaguing us for a year:
2109 With high load, circuit package window was reaching 0. Whenever
2110 we got a circuit-level sendme, we were reading a lot on each
2111 socket, but only writing out a bit. So we would eventually reach
2112 eof. This would be noticed and acted on even when there were still
2113 bytes sitting in the inbuf.
2114 - Use identity comparison, not nickname comparison, to choose which
2115 half of circuit-ID-space each side gets to use. This is needed
2116 because sometimes we think of a router as a nickname, and sometimes
2117 as a hex ID, and we can't predict what the other side will do.
2119 o Bugfixes on 0.0.8.1 (Other):
2120 - Fix a whole slew of memory leaks.
2121 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
2122 - If we are using select, make sure we stay within FD_SETSIZE.
2123 - When poll() is interrupted, we shouldn't believe the revents values.
2124 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
2125 and smartlist_len, which are two major profiling offenders.
2126 - If do_hup fails, actually notice.
2127 - Flush the log file descriptor after we print "Tor opening log file",
2128 so we don't see those messages days later.
2129 - Hidden service operators now correctly handle version 1 style
2130 INTRODUCE1 cells (nobody generates them still, so not a critical
2132 - Handle more errnos from accept() without closing the listener.
2133 Some OpenBSD machines were closing their listeners because
2134 they ran out of file descriptors.
2135 - Some people had wrapped their tor client/server in a script
2136 that would restart it whenever it died. This did not play well
2137 with our "shut down if your version is obsolete" code. Now people
2138 don't fetch a new directory if their local cached version is
2140 - Make our autogen.sh work on ksh as well as bash.
2141 - Better torrc example lines for dirbindaddress and orbindaddress.
2142 - Improved bounds checking on parsed ints (e.g. config options and
2143 the ones we find in directories.)
2144 - Stop using separate defaults for no-config-file and
2145 empty-config-file. Now you have to explicitly turn off SocksPort,
2146 if you don't want it open.
2147 - We were starting to daemonize before we opened our logs, so if
2148 there were any problems opening logs, we would complain to stderr,
2149 which wouldn't work, and then mysteriously exit.
2150 - If a verified OR connects to us before he's uploaded his descriptor,
2151 or we verify him and hup but he still has the original TLS
2152 connection, then conn->nickname is still set like he's unverified.
2154 o Code security improvements, inspired by Ilja:
2155 - tor_snprintf wrapper over snprintf with consistent (though not C99)
2157 - Replace sprintf with tor_snprintf. (I think they were all safe, but
2159 - Replace strcpy/strncpy with strlcpy in more places.
2160 - Avoid strcat; use tor_snprintf or strlcat instead.
2162 o Features (circuits and streams):
2163 - New circuit building strategy: keep a list of ports that we've
2164 used in the past 6 hours, and always try to have 2 circuits open
2165 or on the way that will handle each such port. Seed us with port
2166 80 so web users won't complain that Tor is "slow to start up".
2167 - Make kill -USR1 dump more useful stats about circuits.
2168 - When warning about retrying or giving up, print the address, so
2169 the user knows which one it's talking about.
2170 - If you haven't used a clean circuit in an hour, throw it away,
2171 just to be on the safe side. (This means after 6 hours a totally
2172 unused Tor client will have no circuits open.)
2173 - Support "foo.nickname.exit" addresses, to let Alice request the
2174 address "foo" as viewed by exit node "nickname". Based on a patch
2176 - If your requested entry or exit node has advertised bandwidth 0,
2178 - Be more greedy about filling up relay cells -- we try reading again
2179 once we've processed the stuff we read, in case enough has arrived
2180 to fill the last cell completely.
2181 - Refuse application socks connections to port 0.
2182 - Use only 0.0.9pre1 and later servers for resolve cells.
2184 o Features (bandwidth):
2185 - Hibernation: New config option "AccountingMax" lets you
2186 set how many bytes per month (in each direction) you want to
2187 allow your server to consume. Rather than spreading those
2188 bytes out evenly over the month, we instead hibernate for some
2189 of the month and pop up at a deterministic time, work until
2190 the bytes are consumed, then hibernate again. Config option
2191 "MonthlyAccountingStart" lets you specify which day of the month
2192 your billing cycle starts on.
2193 - Implement weekly/monthly/daily accounting: now you specify your
2194 hibernation properties by
2195 AccountingMax N bytes|KB|MB|GB|TB
2196 AccountingStart day|week|month [day] HH:MM
2197 Defaults to "month 1 0:00".
2198 - Let bandwidth and interval config options be specified as 5 bytes,
2199 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
2201 o Features (directories):
2202 - New "router-status" line in directory, to better bind each verified
2203 nickname to its identity key.
2204 - Clients can ask dirservers for /dir.z to get a compressed version
2205 of the directory. Only works for servers running 0.0.9, of course.
2206 - Make clients cache directories and use them to seed their router
2207 lists at startup. This means clients have a datadir again.
2208 - Respond to content-encoding headers by trying to uncompress as
2210 - Clients and servers now fetch running-routers; cache
2211 running-routers; compress running-routers; serve compressed
2213 - Make moria2 advertise a dirport of 80, so people behind firewalls
2214 will be able to get a directory.
2215 - Http proxy support
2216 - Dirservers translate requests for http://%s:%d/x to /x
2217 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
2218 be routed through this host.
2219 - Clients ask for /tor/x rather than /x for new enough dirservers.
2220 This way we can one day coexist peacefully with apache.
2221 - Clients specify a "Host: %s%d" http header, to be compatible
2222 with more proxies, and so running squid on an exit node can work.
2223 - Protect dirservers from overzealous descriptor uploading -- wait
2224 10 seconds after directory gets dirty, before regenerating.
2226 o Features (packages and install):
2227 - Add NSI installer contributed by J Doe.
2228 - Apply NT service patch from Osamu Fujino. Still needs more work.
2229 - Commit VC6 and VC7 workspace/project files.
2230 - Commit a tor.spec for making RPM files, with help from jbash.
2231 - Add contrib/torctl.in contributed by Glenn Fink.
2232 - Make expand_filename handle ~ and ~username.
2233 - Use autoconf to enable largefile support where necessary. Use
2234 ftello where available, since ftell can fail at 2GB.
2235 - Ship src/win32/ in the tarball, so people can use it to build.
2236 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
2239 o Features (ui controller):
2240 - Control interface: a separate program can now talk to your
2241 client/server over a socket, and get/set config options, receive
2242 notifications of circuits and streams starting/finishing/dying,
2243 bandwidth used, etc. The next step is to get some GUIs working.
2244 Let us know if you want to help out. See doc/control-spec.txt .
2245 - Ship a contrib/tor-control.py as an example script to interact
2246 with the control port.
2247 - "tor --hash-password zzyxz" will output a salted password for
2248 use in authenticating to the control interface.
2249 - Implement the control-spec's SAVECONF command, to write your
2250 configuration to torrc.
2251 - Get cookie authentication for the controller closer to working.
2252 - When set_conf changes our server descriptor, upload a new copy.
2253 But don't upload it too often if there are frequent changes.
2255 o Features (config and command-line):
2256 - Deprecate unofficial config option abbreviations, and abbreviations
2257 not on the command line.
2258 - Configuration infrastructure support for warning on obsolete
2260 - Give a slightly more useful output for "tor -h".
2261 - Break DirFetchPostPeriod into:
2262 - DirFetchPeriod for fetching full directory,
2263 - StatusFetchPeriod for fetching running-routers,
2264 - DirPostPeriod for posting server descriptor,
2265 - RendPostPeriod for posting hidden service descriptors.
2266 - New log format in config:
2267 "Log minsev[-maxsev] stdout|stderr|syslog" or
2268 "Log minsev[-maxsev] file /var/foo"
2269 - DirPolicy config option, to let people reject incoming addresses
2270 from their dirserver.
2271 - "tor --list-fingerprint" will list your identity key fingerprint
2273 - Make tor --version --version dump the cvs Id of every file.
2274 - New 'MyFamily nick1,...' config option for a server to
2275 specify other servers that shouldn't be used in the same circuit
2276 with it. Only believed if nick1 also specifies us.
2277 - New 'NodeFamily nick1,nick2,...' config option for a client to
2278 specify nodes that it doesn't want to use in the same circuit.
2279 - New 'Redirectexit pattern address:port' config option for a
2280 server to redirect exit connections, e.g. to a local squid.
2281 - Add "pass" target for RedirectExit, to make it easier to break
2282 out of a sequence of RedirectExit rules.
2283 - Make the dirservers file obsolete.
2284 - Include a dir-signing-key token in directories to tell the
2285 parsing entity which key is being used to sign.
2286 - Remove the built-in bulky default dirservers string.
2287 - New config option "Dirserver %s:%d [fingerprint]", which can be
2288 repeated as many times as needed. If no dirservers specified,
2289 default to moria1,moria2,tor26.
2290 - Make 'Routerfile' config option obsolete.
2291 - Discourage people from setting their dirfetchpostperiod more often
2292 than once per minute.
2295 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
2296 get back to normal.)
2297 - Accept *:706 (silc) in default exit policy.
2298 - Implement new versioning format for post 0.1.
2299 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
2300 log more informatively.
2301 - Check clock skew for verified servers, but allow unverified
2302 servers and clients to have any clock skew.
2303 - Make sure the hidden service descriptors are at a random offset
2304 from each other, to hinder linkability.
2305 - Clients now generate a TLS cert too, in preparation for having
2306 them act more like real nodes.
2307 - Add a pure-C tor-resolve implementation.
2308 - Use getrlimit and friends to ensure we can reach MaxConn (currently
2309 1024) file descriptors.
2310 - Raise the max dns workers from 50 to 100.
2313 Changes in version 0.0.8.1 - 2004-10-13
2315 - Fix a seg fault that can be triggered remotely for Tor
2316 clients/servers with an open dirport.
2317 - Fix a rare assert trigger, where routerinfos for entries in
2318 our cpath would expire while we're building the path.
2319 - Fix a bug in OutboundBindAddress so it (hopefully) works.
2320 - Fix a rare seg fault for people running hidden services on
2321 intermittent connections.
2322 - Fix a bug in parsing opt keywords with objects.
2323 - Fix a stale pointer assert bug when a stream detaches and
2325 - Fix a string format vulnerability (probably not exploitable)
2326 in reporting stats locally.
2327 - Fix an assert trigger: sometimes launching circuits can fail
2328 immediately, e.g. because too many circuits have failed recently.
2329 - Fix a compile warning on 64 bit platforms.
2332 Changes in version 0.0.8 - 2004-08-25
2334 - Made our unit tests compile again on OpenBSD 3.5, and tor
2335 itself compile again on OpenBSD on a sparc64.
2336 - We were neglecting milliseconds when logging on win32, so
2337 everything appeared to happen at the beginning of each second.
2338 - Check directory signature _before_ you decide whether you're
2339 you're running an obsolete version and should exit.
2340 - Check directory signature _before_ you parse the running-routers
2341 list to decide who's running.
2342 - Check return value of fclose while writing to disk, so we don't
2343 end up with broken files when servers run out of disk space.
2344 - Port it to SunOS 5.9 / Athena
2345 - Fix two bugs in saving onion keys to disk when rotating, so
2346 hopefully we'll get fewer people using old onion keys.
2347 - Remove our mostly unused -- and broken -- hex_encode()
2348 function. Use base16_encode() instead. (Thanks to Timo Lindfors
2349 for pointing out this bug.)
2350 - Only pick and establish intro points after we've gotten a
2352 - Fix assert triggers: if the other side returns an address 0.0.0.0,
2353 don't put it into the client dns cache.
2354 - If a begin failed due to exit policy, but we believe the IP
2355 address should have been allowed, switch that router to exitpolicy
2356 reject *:* until we get our next directory.
2359 - 'Extend' relay cell payloads now include the digest of the
2360 intended next hop's identity key. Now we can verify that we're
2361 extending to the right router, and also extend to routers we
2362 hadn't heard of before.
2365 - Tor nodes can now act as relays (with an advertised ORPort)
2366 without being manually verified by the dirserver operators.
2367 - Uploaded descriptors of unverified routers are now accepted
2368 by the dirservers, and included in the directory.
2369 - Verified routers are listed by nickname in the running-routers
2370 list; unverified routers are listed as "$<fingerprint>".
2371 - We now use hash-of-identity-key in most places rather than
2372 nickname or addr:port, for improved security/flexibility.
2373 - AllowUnverifiedNodes config option to let circuits choose no-name
2374 routers in entry,middle,exit,introduction,rendezvous positions.
2375 Allow middle and rendezvous positions by default.
2376 - When picking unverified routers, skip those with low uptime and/or
2377 low bandwidth, depending on what properties you care about.
2378 - ClientOnly option for nodes that never want to become servers.
2379 - Directory caching.
2380 - "AuthoritativeDir 1" option for the official dirservers.
2381 - Now other nodes (clients and servers) will cache the latest
2382 directory they've pulled down.
2383 - They can enable their DirPort to serve it to others.
2384 - Clients will pull down a directory from any node with an open
2385 DirPort, and check the signature/timestamp correctly.
2386 - Authoritative dirservers now fetch directories from other
2387 authdirservers, to stay better synced.
2388 - Running-routers list tells who's down also, along with noting
2389 if they're verified (listed by nickname) or unverified (listed
2391 - Allow dirservers to serve running-router list separately.
2392 This isn't used yet.
2393 - You can now fetch $DIRURL/running-routers to get just the
2394 running-routers line, not the whole descriptor list. (But
2395 clients don't use this yet.)
2396 - Clients choose nodes proportional to advertised bandwidth.
2397 - Clients avoid using nodes with low uptime as introduction points.
2398 - Handle servers with dynamic IP addresses: don't just replace
2399 options->Address with the resolved one at startup, and
2400 detect our address right before we make a routerinfo each time.
2401 - 'FascistFirewall' option to pick dirservers and ORs on specific
2402 ports; plus 'FirewallPorts' config option to tell FascistFirewall
2403 which ports are open. (Defaults to 80,443)
2404 - Try other dirservers immediately if the one you try is down. This
2405 should tolerate down dirservers better now.
2406 - ORs connect-on-demand to other ORs
2407 - If you get an extend cell to an OR you're not connected to,
2408 connect, handshake, and forward the create cell.
2409 - The authoritative dirservers stay connected to everybody,
2410 and everybody stays connected to 0.0.7 servers, but otherwise
2411 clients/servers expire unused connections after 5 minutes.
2412 - When servers get a sigint, they delay 30 seconds (refusing new
2413 connections) then exit. A second sigint causes immediate exit.
2414 - File and name management:
2415 - Look for .torrc if no CONFDIR "torrc" is found.
2416 - If no datadir is defined, then choose, make, and secure ~/.tor
2418 - If torrc not found, exitpolicy reject *:*.
2419 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
2420 - If no nickname is defined, derive default from hostname.
2421 - Rename secret key files, e.g. identity.key -> secret_id_key,
2422 to discourage people from mailing their identity key to tor-ops.
2423 - Refuse to build a circuit before the directory has arrived --
2424 it won't work anyway, since you won't know the right onion keys
2426 - Parse tor version numbers so we can do an is-newer-than check
2427 rather than an is-in-the-list check.
2428 - New socks command 'resolve', to let us shim gethostbyname()
2430 - A 'tor_resolve' script to access the socks resolve functionality.
2431 - A new socks-extensions.txt doc file to describe our
2432 interpretation and extensions to the socks protocols.
2433 - Add a ContactInfo option, which gets published in descriptor.
2434 - Write tor version at the top of each log file
2435 - New docs in the tarball:
2437 - Document that you should proxy your SSL traffic too.
2438 - Log a warning if the user uses an unsafe socks variant, so people
2439 are more likely to learn about privoxy or socat.
2440 - Log a warning if you're running an unverified server, to let you
2441 know you might want to get it verified.
2442 - Change the default exit policy to reject the default edonkey,
2443 kazaa, gnutella ports.
2444 - Add replace_file() to util.[ch] to handle win32's rename().
2445 - Publish OR uptime in descriptor (and thus in directory) too.
2446 - Remember used bandwidth (both in and out), and publish 15-minute
2447 snapshots for the past day into our descriptor.
2448 - Be more aggressive about trying to make circuits when the network
2449 has changed (e.g. when you unsuspend your laptop).
2450 - Check for time skew on http headers; report date in response to
2452 - If the entrynode config line has only one node, don't pick it as
2454 - Add strict{entry|exit}nodes config options. If set to 1, then
2455 we refuse to build circuits that don't include the specified entry
2457 - OutboundBindAddress config option, to bind to a specific
2458 IP address for outgoing connect()s.
2459 - End truncated log entries (e.g. directories) with "[truncated]".
2462 Changes in version 0.0.7.3 - 2004-08-12
2463 o Stop dnsworkers from triggering an assert failure when you
2464 ask them to resolve the host "".
2467 Changes in version 0.0.7.2 - 2004-07-07
2468 o A better fix for the 0.0.0.0 problem, that will hopefully
2469 eliminate the remaining related assertion failures.
2472 Changes in version 0.0.7.1 - 2004-07-04
2473 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
2474 since internally we use 0.0.0.0 to signify "not yet resolved".
2477 Changes in version 0.0.7 - 2004-06-07
2478 o Fixes for crashes and other obnoxious bugs:
2479 - Fix an epipe bug: sometimes when directory connections failed
2480 to connect, we would give them a chance to flush before closing
2482 - When we detached from a circuit because of resolvefailed, we
2483 would immediately try the same circuit twice more, and then
2484 give up on the resolve thinking we'd tried three different
2486 - Limit the number of intro circuits we'll attempt to build for a
2487 hidden service per 15-minute period.
2488 - Check recommended-software string *early*, before actually parsing
2489 the directory. Thus we can detect an obsolete version and exit,
2490 even if the new directory format doesn't parse.
2491 o Fixes for security bugs:
2492 - Remember which nodes are dirservers when you startup, and if a
2493 random OR enables his dirport, don't automatically assume he's
2494 a trusted dirserver.
2496 - Directory connections were asking the wrong poll socket to
2497 start writing, and not asking themselves to start writing.
2498 - When we detached from a circuit because we sent a begin but
2499 didn't get a connected, we would use it again the first time;
2500 but after that we would correctly switch to a different one.
2501 - Stop warning when the first onion decrypt attempt fails; they
2502 will sometimes legitimately fail now that we rotate keys.
2503 - Override unaligned-access-ok check when $host_cpu is ia64 or
2504 arm. Apparently they allow it but the kernel whines.
2505 - Dirservers try to reconnect periodically too, in case connections
2507 - Fix some memory leaks in directory servers.
2508 - Allow backslash in Win32 filenames.
2509 - Made Tor build complain-free on FreeBSD, hopefully without
2510 breaking other BSD builds. We'll see.
2511 - Check directory signatures based on name of signer, not on whom
2512 we got the directory from. This will let us cache directories more
2514 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
2517 - Doxygen markup on all functions and global variables.
2518 - Make directory functions update routerlist, not replace it. So
2519 now directory disagreements are not so critical a problem.
2520 - Remove the upper limit on number of descriptors in a dirserver's
2521 directory (not that we were anywhere close).
2522 - Allow multiple logfiles at different severity ranges.
2523 - Allow *BindAddress to specify ":port" rather than setting *Port
2524 separately. Allow multiple instances of each BindAddress config
2525 option, so you can bind to multiple interfaces if you want.
2526 - Allow multiple exit policy lines, which are processed in order.
2527 Now we don't need that huge line with all the commas in it.
2528 - Enable accept/reject policies on SOCKS connections, so you can bind
2529 to 0.0.0.0 but still control who can use your OP.
2530 - Updated the man page to reflect these features.
2533 Changes in version 0.0.6.2 - 2004-05-16
2534 o Our integrity-checking digest was checking only the most recent cell,
2535 not the previous cells like we'd thought.
2536 Thanks to Stefan Mark for finding the flaw!
2539 Changes in version 0.0.6.1 - 2004-05-06
2540 o Fix two bugs in our AES counter-mode implementation (this affected
2541 onion-level stream encryption, but not TLS-level). It turns
2542 out we were doing something much more akin to a 16-character
2543 polyalphabetic cipher. Oops.
2544 Thanks to Stefan Mark for finding the flaw!
2545 o Retire moria3 as a directory server, and add tor26 as a directory
2549 Changes in version 0.0.6 - 2004-05-02
2551 - Hidden services and rendezvous points are implemented. Go to
2552 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2553 hidden services. (This only works via a socks4a proxy such as
2554 Privoxy, and currently it's quite slow.)
2555 - We now rotate link (tls context) keys and onion keys.
2556 - CREATE cells now include oaep padding, so you can tell
2557 if you decrypted them correctly.
2558 - Retry stream correctly when we fail to connect because of
2559 exit-policy-reject (should try another) or can't-resolve-address.
2560 - When we hup a dirserver and we've *removed* a server from the
2561 approved-routers list, now we remove that server from the
2562 in-memory directories too.
2563 - Add bandwidthburst to server descriptor.
2564 - Directories now say which dirserver signed them.
2565 - Use a tor_assert macro that logs failed assertions too.
2566 - Since we don't support truncateds much, don't bother sending them;
2567 just close the circ.
2568 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2569 - Better debugging for tls errors
2570 - Set Content-Type on the directory and hidserv descriptor.
2571 - Remove IVs from cipher code, since AES-ctr has none.
2573 - Fix an assert trigger for exit nodes that's been plaguing us since
2574 the days of 0.0.2prexx (thanks weasel!)
2575 - Fix a bug where we were closing tls connections intermittently.
2576 It turns out openssl keeps its errors around -- so if an error
2577 happens, and you don't ask about it, and then another openssl
2578 operation happens and succeeds, and you ask if there was an error,
2579 it tells you about the first error.
2580 - Fix a bug that's been lurking since 27 may 03 (!)
2581 When passing back a destroy cell, we would use the wrong circ id.
2582 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2583 - Some versions of openssl have an SSL_pending function that erroneously
2584 returns bytes when there is a non-application record pending.
2585 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2586 o We were using an array of length zero in a few places.
2587 o Win32's gethostbyname can't resolve an IP to an IP.
2588 o Win32's close can't close a socket.
2589 o Handle windows socket errors correctly.
2591 - check for <sys/limits.h> so we build on FreeBSD again, and
2592 <machine/limits.h> for NetBSD.
2595 Changes in version 0.0.5 - 2004-03-30
2596 o Install torrc as torrc.sample -- we no longer clobber your
2598 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2599 o Only build circuits after we've fetched the directory: clients were
2600 using only the directory servers before they'd fetched a directory.
2601 This also means longer startup time; so it goes.
2602 o Fix an assert trigger where an OP would fail to handshake, and we'd
2603 expect it to have a nickname.
2604 o Work around a tsocks bug: do a socks reject when AP connection dies
2605 early, else tsocks goes into an infinite loop.
2606 o Hold socks connection open until reply is flushed (if possible)
2607 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2608 the dns farm to do it.
2609 o Fix c99 aliasing warnings in rephist.c
2610 o Don't include server descriptors that are older than 24 hours in the
2612 o Give socks 'reject' replies their whole 15s to attempt to flush,
2613 rather than seeing the 60s timeout and assuming the flush had failed.
2614 o Clean automake droppings from the cvs repository
2615 o Add in a 'notice' log level for things the operator should hear
2616 but that aren't warnings
2619 Changes in version 0.0.4 - 2004-03-26
2620 o When connecting to a dirserver or OR and the network is down,
2624 Changes in version 0.0.3 - 2004-03-26
2625 o Warn and fail if server chose a nickname with illegal characters
2626 o Port to Solaris and Sparc:
2627 - include missing header fcntl.h
2628 - have autoconf find -lsocket -lnsl automatically
2629 - deal with hardware word alignment
2630 - make uname() work (solaris has a different return convention)
2631 - switch from using signal() to sigaction()
2632 o Preliminary work on reputation system:
2633 - Keep statistics on success/fail of connect attempts; they're published
2634 by kill -USR1 currently.
2635 - Add a RunTesting option to try to learn link state by creating test
2636 circuits, even when SocksPort is off.
2637 - Remove unused open circuits when there are too many.
2640 Changes in version 0.0.2 - 2004-03-19
2641 - Include strlcpy and strlcat for safer string ops
2642 - define INADDR_NONE so we compile (but still not run) on solaris
2645 Changes in version 0.0.2pre27 - 2004-03-14
2647 - Allow internal tor networks (we were rejecting internal IPs,
2648 now we allow them if they're set explicitly).
2649 - And fix a few endian issues.
2652 Changes in version 0.0.2pre26 - 2004-03-14
2654 - If a stream times out after 15s without a connected cell, don't
2655 try that circuit again: try a new one.
2656 - Retry streams at most 4 times. Then give up.
2657 - When a dirserver gets a descriptor from an unknown router, it
2658 logs its fingerprint (so the dirserver operator can choose to
2659 accept it even without mail from the server operator).
2660 - Inform unapproved servers when we reject their descriptors.
2661 - Make tor build on Windows again. It works as a client, who knows
2663 - Clearer instructions in the torrc for how to set up a server.
2664 - Be more efficient about reading fd's when our global token bucket
2665 (used for rate limiting) becomes empty.
2667 - Stop asserting that computers always go forward in time. It's
2669 - When we sent a cell (e.g. destroy) and then marked an OR connection
2670 expired, we might close it before finishing a flush if the other
2671 side isn't reading right then.
2672 - Don't allow dirservers to start if they haven't defined
2674 - We were caching transient dns failures. Oops.
2675 - Prevent servers from publishing an internal IP as their address.
2676 - Address a strcat vulnerability in circuit.c
2679 Changes in version 0.0.2pre25 - 2004-03-04
2681 - Put the OR's IP in its router descriptor, not its fqdn. That way
2682 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2685 - If the user typed in an address that didn't resolve, the server
2689 Changes in version 0.0.2pre24 - 2004-03-03
2691 - Fix an assertion failure in dns.c, where we were trying to dequeue
2692 a pending dns resolve even if it wasn't pending
2693 - Fix a spurious socks5 warning about still trying to write after the
2694 connection is finished.
2695 - Hold certain marked_for_close connections open until they're finished
2696 flushing, rather than losing bytes by closing them too early.
2697 - Correctly report the reason for ending a stream
2698 - Remove some duplicate calls to connection_mark_for_close
2699 - Put switch_id and start_daemon earlier in the boot sequence, so it
2700 will actually try to chdir() to options.DataDirectory
2701 - Make 'make test' exit(1) if a test fails; fix some unit tests
2702 - Make tor fail when you use a config option it doesn't know about,
2703 rather than warn and continue.
2704 - Make --version work
2705 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2708 Changes in version 0.0.2pre23 - 2004-02-29
2710 - Print a statement when the first circ is finished, so the user
2712 - If a relay cell is unrecognized at the end of the circuit,
2713 send back a destroy. (So attacks to mutate cells are more
2715 - New config option 'excludenodes' to avoid certain nodes for circuits.
2716 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2717 so you can collect coredumps there.
2719 - Fix a bug in tls flushing where sometimes data got wedged and
2720 didn't flush until more data got sent. Hopefully this bug was
2721 a big factor in the random delays we were seeing.
2722 - Make 'connected' cells include the resolved IP, so the client
2723 dns cache actually gets populated.
2724 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2725 - When we time-out on a stream and detach from the circuit, send an
2726 end cell down it first.
2727 - Only warn about an unknown router (in exitnodes, entrynodes,
2728 excludenodes) after we've fetched a directory.
2731 Changes in version 0.0.2pre22 - 2004-02-26
2733 - Servers publish less revealing uname information in descriptors.
2734 - More memory tracking and assertions, to crash more usefully when
2736 - If the default torrc isn't there, just use some default defaults.
2737 Plus provide an internal dirservers file if they don't have one.
2738 - When the user tries to use Tor as an http proxy, give them an http
2739 501 failure explaining that we're a socks proxy.
2740 - Dump a new router.desc on hup, to help confused people who change
2741 their exit policies and then wonder why router.desc doesn't reflect
2743 - Clean up the generic tor.sh init script that we ship with.
2745 - If the exit stream is pending on the resolve, and a destroy arrives,
2746 then the stream wasn't getting removed from the pending list. I
2747 think this was the one causing recent server crashes.
2748 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2749 - When it couldn't resolve any dirservers, it was useless from then on.
2750 Now it reloads the RouterFile (or default dirservers) if it has no
2752 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2753 many users don't even *have* a /usr/local/sbin/.
2756 Changes in version 0.0.2pre21 - 2004-02-18
2758 - There's a ChangeLog file that actually reflects the changelog.
2759 - There's a 'torify' wrapper script, with an accompanying
2760 tor-tsocks.conf, that simplifies the process of using tsocks for
2761 tor. It even has a man page.
2762 - The tor binary gets installed to sbin rather than bin now.
2763 - Retry streams where the connected cell hasn't arrived in 15 seconds
2764 - Clean up exit policy handling -- get the default out of the torrc,
2765 so we can update it without forcing each server operator to fix
2767 - Allow imaps and pop3s in default exit policy
2769 - Prevent picking middleman nodes as the last node in the circuit
2772 Changes in version 0.0.2pre20 - 2004-01-30
2774 - We now have a deb package, and it's in debian unstable. Go to
2776 - I've split the TotalBandwidth option into BandwidthRate (how many
2777 bytes per second you want to allow, long-term) and
2778 BandwidthBurst (how many bytes you will allow at once before the cap
2779 kicks in). This better token bucket approach lets you, say, set
2780 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2781 performance while not exceeding your monthly bandwidth quota.
2782 - Push out a tls record's worth of data once you've got it, rather
2783 than waiting until you've read everything waiting to be read. This
2784 may improve performance by pipelining better. We'll see.
2785 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2786 from failed circuits (if they haven't been connected yet) and attach
2788 - Expire old streams that haven't managed to connect. Some day we'll
2789 have them reattach to new circuits instead.
2792 - Fix several memory leaks that were causing servers to become bloated
2794 - Fix a few very rare assert triggers. A few more remain.
2795 - Setuid to User _before_ complaining about running as root.
2798 Changes in version 0.0.2pre19 - 2004-01-07
2800 - Fix deadlock condition in dns farm. We were telling a child to die by
2801 closing the parent's file descriptor to him. But newer children were
2802 inheriting the open file descriptor from the parent, and since they
2803 weren't closing it, the socket never closed, so the child never read
2804 eof, so he never knew to exit. Similarly, dns workers were holding
2805 open other sockets, leading to all sorts of chaos.
2806 - New cleaner daemon() code for forking and backgrounding.
2807 - If you log to a file, it now prints an entry at the top of the
2808 logfile so you know it's working.
2809 - The onionskin challenge length was 30 bytes longer than necessary.
2810 - Started to patch up the spec so it's not quite so out of date.
2813 Changes in version 0.0.2pre18 - 2004-01-02
2815 - Fix endian issues with the 'integrity' field in the relay header.
2816 - Fix a potential bug where connections in state
2817 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2820 Changes in version 0.0.2pre17 - 2003-12-30
2822 - Made --debuglogfile (or any second log file, actually) work.
2823 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2824 adversary could force us into an infinite loop.
2827 - Each onionskin handshake now includes a hash of the computed key,
2828 to prove the server's identity and help perfect forward secrecy.
2829 - Changed cell size from 256 to 512 bytes (working toward compatibility
2831 - Changed cell length to 2 bytes, and moved it to the relay header.
2832 - Implemented end-to-end integrity checking for the payloads of
2834 - Separated streamid from 'recognized' (otherwise circuits will get
2835 messed up when we try to have streams exit from the middle). We
2836 use the integrity-checking to confirm that a cell is addressed to
2838 - Randomize the initial circid and streamid values, so an adversary who
2839 breaks into a node can't learn how many circuits or streams have
2843 Changes in version 0.0.2pre16 - 2003-12-14
2845 - Fixed a bug that made HUP trigger an assert
2846 - Fixed a bug where a circuit that immediately failed wasn't being
2847 counted as a failed circuit in counting retries.
2850 - Now we close the circuit when we get a truncated cell: otherwise we're
2851 open to an anonymity attack where a bad node in the path truncates
2852 the circuit and then we open streams at him.
2853 - Add port ranges to exit policies
2854 - Add a conservative default exit policy
2855 - Warn if you're running tor as root
2856 - on HUP, retry OR connections and close/rebind listeners
2857 - options.EntryNodes: try these nodes first when picking the first node
2858 - options.ExitNodes: if your best choices happen to include any of
2859 your preferred exit nodes, you choose among just those preferred
2861 - options.ExcludedNodes: nodes that are never picked in path building
2864 Changes in version 0.0.2pre15 - 2003-12-03
2865 o Robustness and bugfixes:
2866 - Sometimes clients would cache incorrect DNS resolves, which would
2867 really screw things up.
2868 - An OP that goes offline would slowly leak all its sockets and stop
2870 - A wide variety of bugfixes in exit node selection, exit policy
2871 handling, and processing pending streams when a new circuit is
2873 - Pick nodes for a path only from those the directory says are up
2874 - Choose randomly from all running dirservers, not always the first one
2875 - Increase allowed http header size for directory fetch.
2876 - Stop writing to stderr (if we're daemonized it will be closed).
2877 - Enable -g always, so cores will be more useful to me.
2878 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2881 - Wrote a man page. It lists commonly used options.
2884 - Change default loglevel to warn.
2885 - Make PidFile default to null rather than littering in your CWD.
2886 - OnionRouter config option is now obsolete. Instead it just checks
2888 - Moved to a single unified torrc file for both clients and servers.
2891 Changes in version 0.0.2pre14 - 2003-11-29
2892 o Robustness and bugfixes:
2893 - Force the admin to make the DataDirectory himself
2894 - to get ownership/permissions right
2895 - so clients no longer make a DataDirectory and then never use it
2896 - fix bug where a client who was offline for 45 minutes would never
2897 pull down a directory again
2898 - fix (or at least hide really well) the dns assert bug that was
2899 causing server crashes
2900 - warnings and improved robustness wrt clockskew for certs
2901 - use the native daemon(3) to daemonize, when available
2902 - exit if bind() fails
2903 - exit if neither socksport nor orport is defined
2904 - include our own tor_timegm (Win32 doesn't have its own)
2905 - bugfix for win32 with lots of connections
2906 - fix minor bias in PRNG
2907 - make dirserver more robust to corrupt cached directory
2910 - Wrote the design document (woo)
2912 o Circuit building and exit policies:
2913 - Circuits no longer try to use nodes that the directory has told them
2915 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2916 bitcounts (18.0.0.0/8).
2917 - Make AP connections standby for a circuit if no suitable circuit
2918 exists, rather than failing
2919 - Circuits choose exit node based on addr/port, exit policies, and
2920 which AP connections are standing by
2921 - Bump min pathlen from 2 to 3
2922 - Relay end cells have a payload to describe why the stream ended.
2923 - If the stream failed because of exit policy, try again with a new
2925 - Clients have a dns cache to remember resolved addresses.
2926 - Notice more quickly when we have no working circuits
2929 - APPort is now called SocksPort
2930 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2932 - RecommendedVersions is now a config variable rather than
2933 hardcoded (for dirservers)
2934 - Reloads config on HUP
2935 - Usage info on -h or --help
2936 - If you set User and Group config vars, it'll setu/gid to them.
2938 Changes in version 0.0.2pre13 - 2003-10-19
2939 o General stability:
2940 - SSL_write no longer fails when it returns WANTWRITE and the number
2941 of bytes in the buf has changed by the next SSL_write call.
2942 - Fix segfault fetching directory when network is down
2943 - Fix a variety of minor memory leaks
2944 - Dirservers reload the fingerprints file on HUP, so I don't have
2945 to take down the network when I approve a new router
2946 - Default server config file has explicit Address line to specify fqdn
2949 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2950 - Make listener connections not ever alloc bufs
2952 o Autoconf improvements:
2953 - don't clobber an external CFLAGS in ./configure
2954 - Make install now works
2955 - create var/lib/tor on make install
2956 - autocreate a tor.sh initscript to help distribs
2957 - autocreate the torrc and sample-server-torrc with correct paths
2959 o Log files and Daemonizing now work:
2960 - If --DebugLogFile is specified, log to it at -l debug
2961 - If --LogFile is specified, use it instead of commandline
2962 - If --RunAsDaemon is set, tor forks and backgrounds on startup