1 Changes in version 0.1.2.7-alpha - 2007-??-??
2 o Major bugfixes (rate limiting):
3 - Servers decline directory requests much more aggressively when
4 they're low on bandwidth. Otherwise they end up queueing more and
5 more directory responses, which can't be good for latency.
6 - But never refuse directory requests from local addresses.
7 - Be willing to read or write on local connections (e.g. controller
8 connections) even when the global rate limiting buckets are empty.
9 - If our system clock jumps back in time, don't publish a negative
10 uptime in the descriptor. Also, don't let the global rate limiting
11 buckets go absurdly negative.
12 - Flush local controller connection buffers periodically as we're
13 writing to them, so we avoid queueing 4+ megabytes of data before
16 o Major bugfixes (other):
17 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
19 - Previously, we would cache up to 16 old networkstatus documents
20 indefinitely, if they came from nontrusted authorities. Now we
21 discard them if they are more than 10 days old.
22 - Detect and reject malformed DNS responses containing circular
24 - Fix a memory leak when sending a 503 response for a networkstatus
26 - If we're not marking exits as guards, ignore exit bandwidth
27 when we're deciding the required bandwidth to become a guard.
30 - When computing clock skew from directory HTTP headers, consider what
31 time it was when we finished asking for the directory, not what
33 - Add some defensive programming to eventdns.c in an attempt to catch
34 possible memory-stomping bugs.
35 - Fix crash with "tor --list-fingerprint" (reported by seeess).
36 - Expire socks connections if they spend too long waiting for the
37 handshake to finish. Previously we would let them sit around for
38 days, if the connecting application didn't close them either.
39 - And if the socks handshake hasn't started, don't send a
40 "DNS resolve socks failed" handshake reply; just close it.
41 - Stop using C functions that OpenBSD's linker doesn't like.
42 - Detect and reject DNS replies containing IPv4 or IPv6 records with
43 an incorrect number of bytes. (Previously, we would ignore the
45 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
46 in the correct order, and doesn't crash.
47 - Free memory held in recently-completed DNS lookup attempts on exit.
48 This was not a memory leak, but may have been hiding memory leaks.
49 - Don't launch requests for descriptors unless we have networkstatuses
50 from at least half of the authorities. This delays the first
51 download slightly under pathological circumstances, but can prevent
52 us from downloading a bunch of descriptors we don't need.
53 - Do not log IPs with TLS failures for incoming TLS
54 connections. (Fixes bug 382.)
55 - When we're handling a directory connection tunneled over Tor,
56 don't fill up internal memory buffers with all the data we want
57 to tunnel; instead, only add it if the OR connection that will
58 eventually receive it has some room for it. (This can lead to
59 slowdowns in tunneled dir connections; a better solution will have
61 - If the user asks to use invalid exit nodes, be willing to use the
63 - Handle TTL values correctly on reverse DNS lookups.
64 - Stop using the reserved ac_cv namespace in our configure script.
67 - Weight directory requests by advertised bandwidth. Now we can
68 let servers enable write limiting but still allow most clients to
69 succeed at their directory requests.
72 - Create a new file ReleaseNotes which was the old ChangeLog. The
73 new ChangeLog file now includes the summaries for even development
75 - Check for addresses with invalid characters at the exit as well
76 as at the client, and warn less verbosely when they fail. You can
77 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
78 - Adapt a patch from goodell to let the contrib/exitlist script
79 take arguments rather than require direct editing.
80 - Inform the server operator when we decide not to advertise a
81 DirPort due to AccountingMax enabled or a low BandwidthRate. It
82 was confusing Zax, so now we're hopefully more helpful.
83 - Bring us one step closer to being able to establish an encrypted
84 directory tunnel without knowing a descriptor first. Still not
85 ready yet. As part of the change, now assume we can use a
86 create_fast cell if we don't know anything about a router.
87 - Allow exit nodes to use nameservers running on ports other than 53.
89 o Minor features (controller):
90 - Track reasons for OR connection failure; make these reasons
91 available via the controller interface. (Patch from Mike Perry.)
92 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
93 can learn when clients are sending malformed hostnames to Tor.
94 - Clean up documentation for controller status events.
97 Changes in version 0.1.2.6-alpha - 2007-01-09
99 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
100 connection handles more than 4 gigs in either direction, we crash.
101 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
102 advertised exit node, somebody might try to exit from us when
103 we're bootstrapping and before we've built your descriptor yet.
104 Refuse the connection rather than crashing.
107 - Warn if we (as a server) find that we've resolved an address that we
108 weren't planning to resolve.
109 - Warn that using select() on any libevent version before 1.1 will be
110 unnecessarily slow (even for select()).
111 - Flush ERR-level controller status events just like we currently
112 flush ERR-level log events, so that a Tor shutdown doesn't prevent
113 the controller from learning about current events.
115 o Minor features (more controller status events):
116 - Implement EXTERNAL_ADDRESS server status event so controllers can
117 learn when our address changes.
118 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
119 can learn when directories reject our descriptor.
120 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
121 can learn when a client application is speaking a non-socks protocol
123 - Implement DANGEROUS_SOCKS client status event so controllers
124 can learn when a client application is leaking DNS addresses.
125 - Implement BUG general status event so controllers can learn when
126 Tor is unhappy about its internal invariants.
127 - Implement CLOCK_SKEW general status event so controllers can learn
128 when Tor thinks the system clock is set incorrectly.
129 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
130 server status events so controllers can learn when their descriptors
131 are accepted by a directory.
132 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
133 server status events so controllers can learn about Tor's progress in
134 deciding whether it's reachable from the outside.
135 - Implement BAD_LIBEVENT general status event so controllers can learn
136 when we have a version/method combination in libevent that needs to
138 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
139 and DNS_USELESS server status events so controllers can learn
140 about changes to DNS server status.
142 o Minor features (directory):
143 - Authorities no longer recommend exits as guards if this would shift
144 too much load to the exit nodes.
147 Changes in version 0.1.2.5-alpha - 2007-01-06
149 - Enable write limiting as well as read limiting. Now we sacrifice
150 capacity if we're pushing out lots of directory traffic, rather
151 than overrunning the user's intended bandwidth limits.
152 - Include TLS overhead when counting bandwidth usage; previously, we
153 would count only the bytes sent over TLS, but not the bytes used
155 - Support running the Tor service with a torrc not in the same
156 directory as tor.exe and default to using the torrc located in
157 the %appdata%\Tor\ of the user who installed the service. Patch
159 - Servers now check for the case when common DNS requests are going to
160 wildcarded addresses (i.e. all getting the same answer), and change
161 their exit policy to reject *:* if it's happening.
162 - Implement BEGIN_DIR cells, so we can connect to the directory
163 server via TLS to do encrypted directory requests rather than
164 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
165 config options if you like.
167 o Minor features (config and docs):
168 - Start using the state file to store bandwidth accounting data:
169 the bw_accounting file is now obsolete. We'll keep generating it
170 for a while for people who are still using 0.1.2.4-alpha.
171 - Try to batch changes to the state file so that we do as few
172 disk writes as possible while still storing important things in
174 - The state file and the bw_accounting file get saved less often when
175 the AvoidDiskWrites config option is set.
176 - Make PIDFile work on Windows (untested).
177 - Add internal descriptions for a bunch of configuration options:
178 accessible via controller interface and in comments in saved
180 - Reject *:563 (NNTPS) in the default exit policy. We already reject
181 NNTP by default, so this seems like a sensible addition.
182 - Clients now reject hostnames with invalid characters. This should
183 avoid some inadvertent info leaks. Add an option
184 AllowNonRFC953Hostnames to disable this behavior, in case somebody
185 is running a private network with hosts called @, !, and #.
186 - Add a maintainer script to tell us which options are missing
187 documentation: "make check-docs".
188 - Add a new address-spec.txt document to describe our special-case
189 addresses: .exit, .onion, and .noconnnect.
191 o Minor features (DNS):
192 - Ongoing work on eventdns infrastructure: now it has dns server
193 and ipv6 support. One day Tor will make use of it.
194 - Add client-side caching for reverse DNS lookups.
195 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
196 - When we change nameservers or IP addresses, reset and re-launch
197 our tests for DNS hijacking.
199 o Minor features (directory):
200 - Authorities now specify server versions in networkstatus. This adds
201 about 2% to the side of compressed networkstatus docs, and allows
202 clients to tell which servers support BEGIN_DIR and which don't.
203 The implementation is forward-compatible with a proposed future
204 protocol version scheme not tied to Tor versions.
205 - DirServer configuration lines now have an orport= option so
206 clients can open encrypted tunnels to the authorities without
207 having downloaded their descriptors yet. Enabled for moria1,
208 moria2, tor26, and lefkada now in the default configuration.
209 - Directory servers are more willing to send a 503 "busy" if they
210 are near their write limit, especially for v1 directory requests.
211 Now they can use their limited bandwidth for actual Tor traffic.
212 - Clients track responses with status 503 from dirservers. After a
213 dirserver has given us a 503, we try not to use it until an hour has
214 gone by, or until we have no dirservers that haven't given us a 503.
215 - When we get a 503 from a directory, and we're not a server, we don't
216 count the failure against the total number of failures allowed
217 for the thing we're trying to download.
218 - Report X-Your-Address-Is correctly from tunneled directory
219 connections; don't report X-Your-Address-Is when it's an internal
220 address; and never believe reported remote addresses when they're
222 - Protect against an unlikely DoS attack on directory servers.
223 - Add a BadDirectory flag to network status docs so that authorities
224 can (eventually) tell clients about caches they believe to be
227 o Minor features (controller):
228 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
229 - Reimplement GETINFO so that info/names stays in sync with the
231 - Implement "GETINFO fingerprint".
232 - Implement "SETEVENTS GUARD" so controllers can get updates on
233 entry guard status as it changes.
235 o Minor features (clean up obsolete pieces):
236 - Remove some options that have been deprecated since at least
237 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
238 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
240 - We no longer look for identity and onion keys in "identity.key" and
241 "onion.key" -- these were replaced by secret_id_key and
242 secret_onion_key in 0.0.8pre1.
243 - We no longer require unrecognized directory entries to be
246 o Major bugfixes (security):
247 - Stop sending the HttpProxyAuthenticator string to directory
248 servers when directory connections are tunnelled through Tor.
249 - Clients no longer store bandwidth history in the state file.
250 - Do not log introduction points for hidden services if SafeLogging
252 - When generating bandwidth history, round down to the nearest
253 1k. When storing accounting data, round up to the nearest 1k.
254 - When we're running as a server, remember when we last rotated onion
255 keys, so that we will rotate keys once they're a week old even if
256 we never stay up for a week ourselves.
258 o Major bugfixes (other):
259 - Fix a longstanding bug in eventdns that prevented the count of
260 timed-out resolves from ever being reset. This bug caused us to
261 give up on a nameserver the third time it timed out, and try it
262 10 seconds later... and to give up on it every time it timed out
264 - Take out the '5 second' timeout from the connection retry
265 schedule. Now the first connect attempt will wait a full 10
266 seconds before switching to a new circuit. Perhaps this will help
267 a lot. Based on observations from Mike Perry.
268 - Fix a bug on the Windows implementation of tor_mmap_file() that
269 would prevent the cached-routers file from ever loading. Reported
273 - Fix an assert failure when a directory authority sets
274 AuthDirRejectUnlisted and then receives a descriptor from an
275 unlisted router. Reported by seeess.
276 - Avoid a double-free when parsing malformed DirServer lines.
277 - Fix a bug when a BSD-style PF socket is first used. Patch from
279 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
280 to resolve an address at a given exit node even when they ask for
282 - Servers no longer ever list themselves in their "family" line,
283 even if configured to do so. This makes it easier to configure
284 family lists conveniently.
285 - When running as a server, don't fall back to 127.0.0.1 when no
286 nameservers are configured in /etc/resolv.conf; instead, make the
287 user fix resolv.conf or specify nameservers explicitly. (Resolves
289 - Stop accepting certain malformed ports in configured exit policies.
290 - Don't re-write the fingerprint file every restart, unless it has
292 - Stop warning when a single nameserver fails: only warn when _all_ of
293 our nameservers have failed. Also, when we only have one nameserver,
294 raise the threshold for deciding that the nameserver is dead.
295 - Directory authorities now only decide that routers are reachable
296 if their identity keys are as expected.
297 - When the user uses bad syntax in the Log config line, stop
298 suggesting other bad syntax as a replacement.
299 - Correctly detect ipv6 DNS capability on OpenBSD.
301 o Minor bugfixes (controller):
302 - Report the circuit number correctly in STREAM CLOSED events. Bug
303 reported by Mike Perry.
304 - Do not report bizarre values for results of accounting GETINFOs
305 when the last second's write or read exceeds the allotted bandwidth.
306 - Report "unrecognized key" rather than an empty string when the
307 controller tries to fetch a networkstatus that doesn't exist.
310 Changes in version 0.1.1.26 - 2006-12-14
312 - Stop sending the HttpProxyAuthenticator string to directory
313 servers when directory connections are tunnelled through Tor.
314 - Clients no longer store bandwidth history in the state file.
315 - Do not log introduction points for hidden services if SafeLogging
319 - Fix an assert failure when a directory authority sets
320 AuthDirRejectUnlisted and then receives a descriptor from an
321 unlisted router (reported by seeess).
324 Changes in version 0.1.2.4-alpha - 2006-12-03
326 - Add support for using natd; this allows FreeBSDs earlier than
327 5.1.2 to have ipfw send connections through Tor without using
328 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
331 - Make all connections to addresses of the form ".noconnect"
332 immediately get closed. This lets application/controller combos
333 successfully test whether they're talking to the same Tor by
334 watching for STREAM events.
335 - Make cross.sh cross-compilation script work even when autogen.sh
336 hasn't been run. (Patch from Michael Mohr.)
337 - Statistics dumped by -USR2 now include a breakdown of public key
338 operations, for profiling.
341 - Fix a major leak when directory authorities parse their
342 approved-routers list, a minor memory leak when we fail to pick
343 an exit node, and a few rare leaks on errors.
344 - Handle TransPort connections even when the server sends data before
345 the client sends data. Previously, the connection would just hang
346 until the client sent data. (Patch from tup based on patch from
348 - Avoid assert failure when our cached-routers file is empty on
352 - Don't log spurious warnings when we see a circuit close reason we
353 don't recognize; it's probably just from a newer version of Tor.
354 - Have directory authorities allow larger amounts of drift in uptime
355 without replacing the server descriptor: previously, a server that
356 restarted every 30 minutes could have 48 "interesting" descriptors
358 - Start linking to the Tor specification and Tor reference manual
359 correctly in the Windows installer.
360 - Add Vidalia to the OS X uninstaller script, so when we uninstall
361 Tor/Privoxy we also uninstall Vidalia.
362 - Resume building on Irix64, and fix a lot of warnings from its
364 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
365 when we're running as a client.
368 Changes in version 0.1.1.25 - 2006-11-04
370 - When a client asks us to resolve (rather than connect to)
371 an address, and we have a cached answer, give them the cached
372 answer. Previously, we would give them no answer at all.
373 - We were building exactly the wrong circuits when we predict
374 hidden service requirements, meaning Tor would have to build all
375 its circuits on demand.
376 - If none of our live entry guards have a high uptime, but we
377 require a guard with a high uptime, try adding a new guard before
378 we give up on the requirement. This patch should make long-lived
379 connections more stable on average.
380 - When testing reachability of our DirPort, don't launch new
381 tests when there's already one in progress -- unreachable
382 servers were stacking up dozens of testing streams.
385 - When the user sends a NEWNYM signal, clear the client-side DNS
386 cache too. Otherwise we continue to act on previous information.
389 - Avoid a memory corruption bug when creating a hash table for
391 - Avoid possibility of controller-triggered crash when misusing
392 certain commands from a v0 controller on platforms that do not
393 handle printf("%s",NULL) gracefully.
394 - Avoid infinite loop on unexpected controller input.
395 - Don't log spurious warnings when we see a circuit close reason we
396 don't recognize; it's probably just from a newer version of Tor.
397 - Add Vidalia to the OS X uninstaller script, so when we uninstall
398 Tor/Privoxy we also uninstall Vidalia.
401 Changes in version 0.1.2.3-alpha - 2006-10-29
403 - Prepare for servers to publish descriptors less often: never
404 discard a descriptor simply for being too old until either it is
405 recommended by no authorities, or until we get a better one for
406 the same router. Make caches consider retaining old recommended
407 routers for even longer.
408 - If most authorities set a BadExit flag for a server, clients
409 don't think of it as a general-purpose exit. Clients only consider
410 authorities that advertise themselves as listing bad exits.
411 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
412 headers for content, so that we can work better in the presence of
413 caching HTTP proxies.
414 - Allow authorities to list nodes as bad exits by fingerprint or by
417 o Minor features, controller:
418 - Add a REASON field to CIRC events; for backward compatibility, this
419 field is sent only to controllers that have enabled the extended
420 event format. Also, add additional reason codes to explain why
421 a given circuit has been destroyed or truncated. (Patches from
423 - Add a REMOTE_REASON field to extended CIRC events to tell the
424 controller about why a remote OR told us to close a circuit.
425 - Stream events also now have REASON and REMOTE_REASON fields,
426 working much like those for circuit events.
427 - There's now a GETINFO ns/... field so that controllers can ask Tor
428 about the current status of a router.
429 - A new event type "NS" to inform a controller when our opinion of
430 a router's status has changed.
431 - Add a GETINFO events/names and GETINFO features/names so controllers
432 can tell which events and features are supported.
433 - A new CLEARDNSCACHE signal to allow controllers to clear the
434 client-side DNS cache without expiring circuits.
437 - When the user sends a NEWNYM signal, clear the client-side DNS
438 cache too. Otherwise we continue to act on previous information.
441 - Avoid sending junk to controllers or segfaulting when a controller
442 uses EVENT_NEW_DESC with verbose nicknames.
443 - Stop triggering asserts if the controller tries to extend hidden
444 service circuits (reported by mwenge).
445 - Avoid infinite loop on unexpected controller input.
446 - When the controller does a "GETINFO network-status", tell it
447 about even those routers whose descriptors are very old, and use
448 long nicknames where appropriate.
449 - Change NT service functions to be loaded on demand. This lets us
450 build with MinGW without breaking Tor for Windows 98 users.
451 - Do DirPort reachability tests less often, since a single test
452 chews through many circuits before giving up.
453 - In the hidden service example in torrc.sample, stop recommending
454 esoteric and discouraged hidden service options.
455 - When stopping an NT service, wait up to 10 sec for it to actually
456 stop. (Patch from Matt Edman; resolves bug 295.)
457 - Fix handling of verbose nicknames with ORCONN controller events:
458 make them show up exactly when requested, rather than exactly when
460 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
461 printing a duplicate "$" in the keys we send (reported by mwenge).
462 - Correctly set maximum connection limit on Cygwin. (This time
464 - Try to detect Windows correctly when cross-compiling.
465 - Detect the size of the routers file correctly even if it is
466 corrupted (on systems without mmap) or not page-aligned (on systems
467 with mmap). This bug was harmless.
468 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
469 to open a stream fails; now we do in more cases. This should
470 make clients able to find a good exit faster in some cases, since
471 unhandleable requests will now get an error rather than timing out.
472 - Resolve two memory leaks when rebuilding the on-disk router cache
473 (reported by fookoowa).
474 - Clean up minor code warnings suggested by the MIPSpro C compiler,
475 and reported by some Centos users.
476 - Controller signals now work on non-Unix platforms that don't define
477 SIGUSR1 and SIGUSR2 the way we expect.
478 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
479 values before failing, and always enables eventdns.
480 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
481 Try to fix this in configure.in by checking for most functions
482 before we check for libevent.
485 Changes in version 0.1.2.2-alpha - 2006-10-07
487 - Make our async eventdns library on-by-default for Tor servers,
488 and plan to deprecate the separate dnsworker threads.
489 - Add server-side support for "reverse" DNS lookups (using PTR
490 records so clients can determine the canonical hostname for a given
491 IPv4 address). Only supported by servers using eventdns; servers
492 now announce in their descriptors whether they support eventdns.
493 - Specify and implement client-side SOCKS5 interface for reverse DNS
494 lookups (see doc/socks-extensions.txt).
495 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
496 connect to directory servers through Tor. Previously, clients needed
497 to find Tor exits to make private connections to directory servers.
498 - Avoid choosing Exit nodes for entry or middle hops when the
499 total bandwidth available from non-Exit nodes is much higher than
500 the total bandwidth available from Exit nodes.
501 - Workaround for name servers (like Earthlink's) that hijack failing
502 DNS requests and replace the no-such-server answer with a "helpful"
503 redirect to an advertising-driven search portal. Also work around
504 DNS hijackers who "helpfully" decline to hijack known-invalid
505 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
506 lets you turn it off.
507 - Send out a burst of long-range padding cells once we've established
508 that we're reachable. Spread them over 4 circuits, so hopefully
509 a few will be fast. This exercises our bandwidth and bootstraps
510 us into the directory more quickly.
512 o New/improved config options:
513 - Add new config option "ResolvConf" to let the server operator
514 choose an alternate resolve.conf file when using eventdns.
515 - Add an "EnforceDistinctSubnets" option to control our "exclude
516 servers on the same /16" behavior. It's still on by default; this
517 is mostly for people who want to operate private test networks with
518 all the machines on the same subnet.
519 - If one of our entry guards is on the ExcludeNodes list, or the
520 directory authorities don't think it's a good guard, treat it as
521 if it were unlisted: stop using it as a guard, and throw it off
522 the guards list if it stays that way for a long time.
523 - Allow directory authorities to be marked separately as authorities
524 for the v1 directory protocol, the v2 directory protocol, and
525 as hidden service directories, to make it easier to retire old
526 authorities. V1 authorities should set "HSAuthoritativeDir 1"
527 to continue being hidden service authorities too.
528 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
530 o Minor features, controller:
531 - Fix CIRC controller events so that controllers can learn the
532 identity digests of non-Named servers used in circuit paths.
533 - Let controllers ask for more useful identifiers for servers. Instead
534 of learning identity digests for un-Named servers and nicknames
535 for Named servers, the new identifiers include digest, nickname,
536 and indication of Named status. Off by default; see control-spec.txt
537 for more information.
538 - Add a "getinfo address" controller command so it can display Tor's
539 best guess to the user.
540 - New controller event to alert the controller when our server
541 descriptor has changed.
542 - Give more meaningful errors on controller authentication failure.
544 o Minor features, other:
545 - When asked to resolve a hostname, don't use non-exit servers unless
546 requested to do so. This allows servers with broken DNS to be
547 useful to the network.
548 - Divide eventdns log messages into warn and info messages.
549 - Reserve the nickname "Unnamed" for routers that can't pick
550 a hostname: any router can call itself Unnamed; directory
551 authorities will never allocate Unnamed to any particular router;
552 clients won't believe that any router is the canonical Unnamed.
553 - Only include function names in log messages for info/debug messages.
554 For notice/warn/err, the content of the message should be clear on
555 its own, and printing the function name only confuses users.
556 - Avoid some false positives during reachability testing: don't try
557 to test via a server that's on the same /24 as us.
558 - If we fail to build a circuit to an intended enclave, and it's
559 not mandatory that we use that enclave, stop wanting it.
560 - When eventdns is enabled, allow multithreaded builds on NetBSD and
561 OpenBSD. (We had previously disabled threads on these platforms
562 because they didn't have working thread-safe resolver functions.)
564 o Major bugfixes, anonymity/security:
565 - If a client asked for a server by name, and there's a named server
566 in our network-status but we don't have its descriptor yet, we
567 could return an unnamed server instead.
568 - Fix NetBSD bug that could allow someone to force uninitialized RAM
569 to be sent to a server's DNS resolver. This only affects NetBSD
570 and other platforms that do not bounds-check tolower().
571 - Reject (most) attempts to use Tor circuits with length one. (If
572 many people start using Tor as a one-hop proxy, exit nodes become
573 a more attractive target for compromise.)
574 - Just because your DirPort is open doesn't mean people should be
575 able to remotely teach you about hidden service descriptors. Now
576 only accept rendezvous posts if you've got HSAuthoritativeDir set.
578 o Major bugfixes, other:
579 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
580 - When a client asks the server to resolve (not connect to)
581 an address, and it has a cached answer, give them the cached answer.
582 Previously, the server would give them no answer at all.
583 - Allow really slow clients to not hang up five minutes into their
584 directory downloads (suggested by Adam J. Richter).
585 - We were building exactly the wrong circuits when we anticipated
586 hidden service requirements, meaning Tor would have to build all
587 its circuits on demand.
588 - Avoid crashing when we mmap a router cache file of size 0.
589 - When testing reachability of our DirPort, don't launch new
590 tests when there's already one in progress -- unreachable
591 servers were stacking up dozens of testing streams.
593 o Minor bugfixes, correctness:
594 - If we're a directory mirror and we ask for "all" network status
595 documents, we would discard status documents from authorities
597 - Avoid a memory corruption bug when creating a hash table for
599 - Avoid controller-triggered crash when misusing certain commands
600 from a v0 controller on platforms that do not handle
601 printf("%s",NULL) gracefully.
602 - Don't crash when a controller sends a third argument to an
603 "extendcircuit" request.
604 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
605 response; fix error code when "getinfo dir/status/" fails.
606 - Avoid crash when telling controller stream-status and a stream
608 - Patch from Adam Langley to fix assert() in eventdns.c.
609 - Fix a debug log message in eventdns to say "X resolved to Y"
610 instead of "X resolved to X".
611 - Make eventdns give strings for DNS errors, not just error numbers.
612 - Track unreachable entry guards correctly: don't conflate
613 'unreachable by us right now' with 'listed as down by the directory
614 authorities'. With the old code, if a guard was unreachable by
615 us but listed as running, it would clog our guard list forever.
616 - Behave correctly in case we ever have a network with more than
617 2GB/s total advertised capacity.
618 - Make TrackExitHosts case-insensitive, and fix the behavior of
619 ".suffix" TrackExitHosts items to avoid matching in the middle of
621 - Finally fix the openssl warnings from newer gccs that believe that
622 ignoring a return value is okay, but casting a return value and
623 then ignoring it is a sign of madness.
624 - Prevent the contrib/exitlist script from printing the same
625 result more than once.
626 - Patch from Steve Hildrey: Generate network status correctly on
627 non-versioning dirservers.
628 - Don't listen to the X-Your-Address-Is hint if you did the lookup
629 via Tor; otherwise you'll think you're the exit node's IP address.
631 o Minor bugfixes, performance:
632 - Two small performance improvements on parsing descriptors.
633 - Major performance improvement on inserting descriptors: change
634 algorithm from O(n^2) to O(n).
635 - Make the common memory allocation path faster on machines where
636 malloc(0) returns a pointer.
637 - Start remembering X-Your-Address-Is directory hints even if you're
638 a client, so you can become a server more smoothly.
639 - Avoid duplicate entries on MyFamily line in server descriptor.
641 o Packaging, features:
642 - Remove architecture from OS X builds. The official builds are
643 now universal binaries.
644 - The Debian package now uses --verify-config when (re)starting,
645 to distinguish configuration errors from other errors.
646 - Update RPMs to require libevent 1.1b.
648 o Packaging, bugfixes:
649 - Patches so Tor builds with MinGW on Windows.
650 - Patches so Tor might run on Cygwin again.
651 - Resume building on non-gcc compilers and ancient gcc. Resume
652 building with the -O0 compile flag. Resume building cleanly on
654 - Run correctly on OS X platforms with case-sensitive filesystems.
655 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
656 - Add autoconf checks so Tor can build on Solaris x86 again.
659 - Documented (and renamed) ServerDNSSearchDomains and
660 ServerDNSResolvConfFile options.
661 - Be clearer that the *ListenAddress directives can be repeated
665 Changes in version 0.1.1.24 - 2006-09-29
667 - Allow really slow clients to not hang up five minutes into their
668 directory downloads (suggested by Adam J. Richter).
669 - Fix major performance regression from 0.1.0.x: instead of checking
670 whether we have enough directory information every time we want to
671 do something, only check when the directory information has changed.
672 This should improve client CPU usage by 25-50%.
673 - Don't crash if, after a server has been running for a while,
674 it can't resolve its hostname.
675 - When a client asks us to resolve (not connect to) an address,
676 and we have a cached answer, give them the cached answer.
677 Previously, we would give them no answer at all.
680 - Allow Tor to start when RunAsDaemon is set but no logs are set.
681 - Don't crash when the controller receives a third argument to an
682 "extendcircuit" request.
683 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
684 response; fix error code when "getinfo dir/status/" fails.
685 - Fix configure.in to not produce broken configure files with
686 more recent versions of autoconf. Thanks to Clint for his auto*
688 - Fix security bug on NetBSD that could allow someone to force
689 uninitialized RAM to be sent to a server's DNS resolver. This
690 only affects NetBSD and other platforms that do not bounds-check
692 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
693 methods: these are known to be buggy.
694 - If we're a directory mirror and we ask for "all" network status
695 documents, we would discard status documents from authorities
699 Changes in version 0.1.2.1-alpha - 2006-08-27
701 - Add "eventdns" async dns library from Adam Langley, tweaked to
702 build on OSX and Windows. Only enabled if you pass the
703 --enable-eventdns argument to configure.
704 - Allow servers with no hostname or IP address to learn their
705 IP address by asking the directory authorities. This code only
706 kicks in when you would normally have exited with a "no address"
707 error. Nothing's authenticated, so use with care.
708 - Rather than waiting a fixed amount of time between retrying
709 application connections, we wait only 5 seconds for the first,
710 10 seconds for the second, and 15 seconds for each retry after
711 that. Hopefully this will improve the expected user experience.
712 - Patch from Tup to add support for transparent AP connections:
713 this basically bundles the functionality of trans-proxy-tor
714 into the Tor mainline. Now hosts with compliant pf/netfilter
715 implementations can redirect TCP connections straight to Tor
716 without diverting through SOCKS. Needs docs.
717 - Busy directory servers save lots of memory by spooling server
718 descriptors, v1 directories, and v2 networkstatus docs to buffers
719 as needed rather than en masse. Also mmap the cached-routers
720 files, so we don't need to keep the whole thing in memory too.
721 - Automatically avoid picking more than one node from the same
722 /16 network when constructing a circuit.
723 - Revise and clean up the torrc.sample that we ship with; add
724 a section for BandwidthRate and BandwidthBurst.
727 - Split circuit_t into origin_circuit_t and or_circuit_t, and
728 split connection_t into edge, or, dir, control, and base structs.
729 These will save quite a bit of memory on busy servers, and they'll
730 also help us track down bugs in the code and bugs in the spec.
731 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
732 or later. Log when we are doing this, so we can diagnose it when
733 it fails. (Also, recommend libevent 1.1b for kqueue and
734 win32 methods; deprecate libevent 1.0b harder; make libevent
735 recommendation system saner.)
736 - Start being able to build universal binaries on OS X (thanks
738 - Export the default exit policy via the control port, so controllers
739 don't need to guess what it is / will be later.
740 - Add a man page entry for ProtocolWarnings.
741 - Add TestVia config option to the man page.
742 - Remove even more protocol-related warnings from Tor server logs,
743 such as bad TLS handshakes and malformed begin cells.
744 - Stop fetching descriptors if you're not a dir mirror and you
745 haven't tried to establish any circuits lately. [This currently
746 causes some dangerous behavior, because when you start up again
747 you'll use your ancient server descriptors.]
748 - New DirPort behavior: if you have your dirport set, you download
749 descriptors aggressively like a directory mirror, whether or not
751 - Get rid of the router_retry_connections notion. Now routers
752 no longer try to rebuild long-term connections to directory
753 authorities, and directory authorities no longer try to rebuild
754 long-term connections to all servers. We still don't hang up
755 connections in these two cases though -- we need to look at it
756 more carefully to avoid flapping, and we likely need to wait til
758 - Drop compatibility with obsolete Tors that permit create cells
759 to have the wrong circ_id_type.
760 - Re-enable per-connection rate limiting. Get rid of the "OP
761 bandwidth" concept. Lay groundwork for "bandwidth classes" --
762 separate global buckets that apply depending on what sort of conn
764 - Start publishing one minute or so after we find our ORPort
765 to be reachable. This will help reduce the number of descriptors
766 we have for ourselves floating around, since it's quite likely
767 other things (e.g. DirPort) will change during that minute too.
768 - Fork the v1 directory protocol into its own spec document,
769 and mark dir-spec.txt as the currently correct (v2) spec.
772 - When we find our DirPort to be reachable, publish a new descriptor
773 so we'll tell the world (reported by pnx).
774 - Publish a new descriptor after we hup/reload. This is important
775 if our config has changed such that we'll want to start advertising
776 our DirPort now, etc.
777 - Allow Tor to start when RunAsDaemon is set but no logs are set.
778 - When we have a state file we cannot parse, tell the user and
779 move it aside. Now we avoid situations where the user starts
780 Tor in 1904, Tor writes a state file with that timestamp in it,
781 the user fixes her clock, and Tor refuses to start.
782 - Fix configure.in to not produce broken configure files with
783 more recent versions of autoconf. Thanks to Clint for his auto*
785 - "tor --verify-config" now exits with -1(255) or 0 depending on
786 whether the config options are bad or good.
787 - Resolve bug 321 when using dnsworkers: append a period to every
788 address we resolve at the exit node, so that we do not accidentally
789 pick up local addresses, and so that failing searches are retried
790 in the resolver search domains. (This is already solved for
791 eventdns.) (This breaks Blossom servers for now.)
792 - If we are using an exit enclave and we can't connect, e.g. because
793 its webserver is misconfigured to not listen on localhost, then
794 back off and try connecting from somewhere else before we fail.
797 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
798 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
799 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
800 when the IP address is mapped through MapAddress to a hostname.
801 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
802 useless IPv6 DNS resolves.
803 - Patch suggested by Karsten Loesing: respond to SIGNAL command
804 before we execute the signal, in case the signal shuts us down.
805 - Clean up AllowInvalidNodes man page entry.
806 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
807 - Add more asserts to track down an assert error on a windows Tor
808 server with connection_add being called with socket == -1.
809 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
810 - Fix misleading log messages: an entry guard that is "unlisted",
811 as well as not known to be "down" (because we've never heard
812 of it), is not therefore "up".
813 - Remove code to special-case "-cvs" ending, since it has not
814 actually mattered since 0.0.9.
815 - Make our socks5 handling more robust to broken socks clients:
816 throw out everything waiting on the buffer in between socks
817 handshake phases, since they can't possibly (so the theory
818 goes) have predicted what we plan to respond to them.
821 Changes in version 0.1.1.23 - 2006-07-30
823 - Fast Tor servers, especially exit nodes, were triggering asserts
824 due to a bug in handling the list of pending DNS resolves. Some
825 bugs still remain here; we're hunting them.
826 - Entry guards could crash clients by sending unexpected input.
827 - More fixes on reachability testing: if you find yourself reachable,
828 then don't ever make any client requests (so you stop predicting
829 circuits), then hup or have your clock jump, then later your IP
830 changes, you won't think circuits are working, so you won't try to
831 test reachability, so you won't publish.
834 - Avoid a crash if the controller does a resetconf firewallports
835 and then a setconf fascistfirewall=1.
836 - Avoid an integer underflow when the dir authority decides whether
837 a router is stable: we might wrongly label it stable, and compute
838 a slightly wrong median stability, when a descriptor is published
840 - Fix a place where we might trigger an assert if we can't build our
841 own server descriptor yet.
844 Changes in version 0.1.1.22 - 2006-07-05
846 - Fix a big bug that was causing servers to not find themselves
847 reachable if they changed IP addresses. Since only 0.1.1.22+
848 servers can do reachability testing correctly, now we automatically
849 make sure to test via one of these.
850 - Fix to allow clients and mirrors to learn directory info from
851 descriptor downloads that get cut off partway through.
852 - Directory authorities had a bug in deciding if a newly published
853 descriptor was novel enough to make everybody want a copy -- a few
854 servers seem to be publishing new descriptors many times a minute.
856 - Fix a rare bug that was causing some servers to complain about
857 "closing wedged cpuworkers" and skip some circuit create requests.
858 - Make the Exit flag in directory status documents actually work.
861 Changes in version 0.1.1.21 - 2006-06-10
862 o Crash and assert fixes from 0.1.1.20:
863 - Fix a rare crash on Tor servers that have enabled hibernation.
864 - Fix a seg fault on startup for Tor networks that use only one
866 - Fix an assert from a race condition that occurs on Tor servers
867 while exiting, where various threads are trying to log that they're
868 exiting, and delete the logs, at the same time.
869 - Make our unit tests pass again on certain obscure platforms.
872 - Add support for building SUSE RPM packages.
873 - Speed up initial bootstrapping for clients: if we are making our
874 first ever connection to any entry guard, then don't mark it down
876 - When only one Tor server in the network is labelled as a guard,
877 and we've already picked him, we would cycle endlessly picking him
878 again, being unhappy about it, etc. Now we specifically exclude
879 current guards when picking a new guard.
880 - Servers send create cells more reliably after the TLS connection
881 is established: we were sometimes forgetting to send half of them
882 when we had more than one pending.
883 - If we get a create cell that asks us to extend somewhere, but the
884 Tor server there doesn't match the expected digest, we now send
885 a destroy cell back, rather than silently doing nothing.
886 - Make options->RedirectExit work again.
887 - Make cookie authentication for the controller work again.
888 - Stop being picky about unusual characters in the arguments to
889 mapaddress. It's none of our business.
890 - Add a new config option "TestVia" that lets you specify preferred
891 middle hops to use for test circuits. Perhaps this will let me
892 debug the reachability problems better.
894 o Log / documentation fixes:
895 - If we're a server and some peer has a broken TLS certificate, don't
896 log about it unless ProtocolWarnings is set, i.e., we want to hear
897 about protocol violations by others.
898 - Fix spelling of VirtualAddrNetwork in man page.
899 - Add a better explanation at the top of the autogenerated torrc file
900 about what happened to our old torrc.
903 Changes in version 0.1.1.20 - 2006-05-23
905 - Downgrade a log severity where servers complain that they're
907 - Avoid a compile warning on FreeBSD.
908 - Remove string size limit on NEWDESC messages; solve bug 291.
909 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
910 more thoroughly when we're running on windows.
913 Changes in version 0.1.1.19-rc - 2006-05-03
915 - Regenerate our local descriptor if it's dirty and we try to use
916 it locally (e.g. if it changes during reachability detection).
917 - If we setconf our ORPort to 0, we continued to listen on the
918 old ORPort and receive connections.
919 - Avoid a second warning about machine/limits.h on Debian
921 - Be willing to add our own routerinfo into the routerlist.
922 Now authorities will include themselves in their directories
923 and network-statuses.
924 - Stop trying to upload rendezvous descriptors to every
925 directory authority: only try the v1 authorities.
926 - Servers no longer complain when they think they're not
927 registered with the directory authorities. There were too many
929 - Backport dist-rpm changes so rpms can be built without errors.
932 - Implement an option, VirtualAddrMask, to set which addresses
933 get handed out in response to mapaddress requests. This works
934 around a bug in tsocks where 127.0.0.0/8 is never socksified.
937 Changes in version 0.1.1.18-rc - 2006-04-10
939 - Work harder to download live network-statuses from all the
940 directory authorities we know about. Improve the threshold
941 decision logic so we're more robust to edge cases.
942 - When fetching rendezvous descriptors, we were willing to ask
943 v2 authorities too, which would always return 404.
946 - Stop listing down or invalid nodes in the v1 directory. This will
947 reduce its bulk by about 1/3, and reduce load on directory
949 - When deciding whether a router is Fast or Guard-worthy, consider
950 his advertised BandwidthRate and not just the BandwidthCapacity.
951 - No longer ship INSTALL and README files -- they are useless now.
952 - Force rpmbuild to behave and honor target_cpu.
953 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
954 - Start to include translated versions of the tor-doc-*.html
955 files, along with the screenshots. Still needs more work.
956 - Start sending back 512 and 451 errors if mapaddress fails,
957 rather than not sending anything back at all.
958 - When we fail to bind or listen on an incoming or outgoing
959 socket, we should close it before failing. otherwise we just
960 leak it. (thanks to weasel for finding.)
961 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
962 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
963 - Make NoPublish (even though deprecated) work again.
964 - Fix a minor security flaw where a versioning auth dirserver
965 could list a recommended version many times in a row to make
966 clients more convinced that it's recommended.
967 - Fix crash bug if there are two unregistered servers running
968 with the same nickname, one of them is down, and you ask for
969 them by nickname in your EntryNodes or ExitNodes. Also, try
970 to pick the one that's running rather than an arbitrary one.
971 - Fix an infinite loop we could hit if we go offline for too long.
972 - Complain when we hit WSAENOBUFS on recv() or write() too.
973 Perhaps this will help us hunt the bug.
974 - If you're not a versioning dirserver, don't put the string
975 "client-versions \nserver-versions \n" in your network-status.
976 - Lower the minimum required number of file descriptors to 1000,
977 so we can have some overhead for Valgrind on Linux, where the
978 default ulimit -n is 1024.
981 - Add tor.dizum.com as the fifth authoritative directory server.
982 - Add a new config option FetchUselessDescriptors, off by default,
983 for when you plan to run "exitlist" on your client and you want
984 to know about even the non-running descriptors.
987 Changes in version 0.1.1.17-rc - 2006-03-28
989 - Clients and servers since 0.1.1.10-alpha have been expiring
990 connections whenever they are idle for 5 minutes and they *do*
991 have circuits on them. Oops. With this new version, clients will
992 discard their previous entry guard choices and avoid choosing
993 entry guards running these flawed versions.
994 - Fix memory leak when uncompressing concatenated zlib streams. This
995 was causing substantial leaks over time on Tor servers.
996 - The v1 directory was including servers as much as 48 hours old,
997 because that's how the new routerlist->routers works. Now only
998 include them if they're 20 hours old or less.
1001 - Resume building on irix64, netbsd 2.0, etc.
1002 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
1004 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
1005 and it is confusing some users.
1006 - Mirrors stop caching the v1 directory so often.
1007 - Make the max number of old descriptors that a cache will hold
1008 rise with the number of directory authorities, so we can scale.
1009 - Change our win32 uname() hack to be more forgiving about what
1010 win32 versions it thinks it's found.
1013 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
1015 - When the controller's *setconf commands fail, collect an error
1016 message in a string and hand it back to the controller.
1017 - Make the v2 dir's "Fast" flag based on relative capacity, just
1018 like "Stable" is based on median uptime. Name everything in the
1019 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
1020 - Log server fingerprint on startup, so new server operators don't
1021 have to go hunting around their filesystem for it.
1022 - Return a robots.txt on our dirport to discourage google indexing.
1023 - Let the controller ask for GETINFO dir/status/foo so it can ask
1024 directly rather than connecting to the dir port. Only works when
1025 dirport is set for now.
1027 o New config options rather than constants in the code:
1028 - SocksTimeout: How long do we let a socks connection wait
1029 unattached before we fail it?
1030 - CircuitBuildTimeout: Cull non-open circuits that were born
1031 at least this many seconds ago.
1032 - CircuitIdleTimeout: Cull open clean circuits that were born
1033 at least this many seconds ago.
1036 Changes in version 0.1.1.16-rc - 2006-03-18
1037 o Bugfixes on 0.1.1.15-rc:
1038 - Fix assert when the controller asks to attachstream a connect-wait
1039 or resolve-wait stream.
1040 - Now do address rewriting when the controller asks us to attach
1041 to a particular circuit too. This will let Blossom specify
1042 "moria2.exit" without having to learn what moria2's IP address is.
1043 - Make the "tor --verify-config" command-line work again, so people
1044 can automatically check if their torrc will parse.
1045 - Authoritative dirservers no longer require an open connection from
1046 a server to consider him "reachable". We need this change because
1047 when we add new auth dirservers, old servers won't know not to
1049 - Let Tor build on Sun CC again.
1050 - Fix an off-by-one buffer size in dirserv.c that magically never
1051 hit our three authorities but broke sjmurdoch's own tor network.
1052 - If we as a directory mirror don't know of any v1 directory
1053 authorities, then don't try to cache any v1 directories.
1054 - Stop warning about unknown servers in our family when they are
1055 given as hex digests.
1056 - Stop complaining as quickly to the server operator that he
1057 hasn't registered his nickname/key binding.
1058 - Various cleanups so we can add new V2 Auth Dirservers.
1059 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1060 reflect the updated flags in our v2 dir protocol.
1061 - Resume allowing non-printable characters for exit streams (both
1062 for connecting and for resolving). Now we tolerate applications
1063 that don't follow the RFCs. But continue to block malformed names
1066 o Bugfixes on 0.1.0.x:
1067 - Fix assert bug in close_logs(): when we close and delete logs,
1068 remove them all from the global "logfiles" list.
1069 - Fix minor integer overflow in calculating when we expect to use up
1070 our bandwidth allocation before hibernating.
1071 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
1072 there are multiple SSLs installed with different versions.
1073 - When we try to be a server and Address is not explicitly set and
1074 our hostname resolves to a private IP address, try to use an
1075 interface address if it has a public address. Now Windows machines
1076 that think of themselves as localhost can work by default.
1079 - Let the controller ask for GETINFO dir/server/foo so it can ask
1080 directly rather than connecting to the dir port.
1081 - Let the controller tell us about certain router descriptors
1082 that it doesn't want Tor to use in circuits. Implement
1083 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
1084 - New config option SafeSocks to reject all application connections
1085 using unsafe socks protocols. Defaults to off.
1088 Changes in version 0.1.1.15-rc - 2006-03-11
1089 o Bugfixes and cleanups:
1090 - When we're printing strings from the network, don't try to print
1091 non-printable characters. This protects us against shell escape
1092 sequence exploits, and also against attacks to fool humans into
1093 misreading their logs.
1094 - Fix a bug where Tor would fail to establish any connections if you
1095 left it off for 24 hours and then started it: we were happy with
1096 the obsolete network statuses, but they all referred to router
1097 descriptors that were too old to fetch, so we ended up with no
1098 valid router descriptors.
1099 - Fix a seg fault in the controller's "getinfo orconn-status"
1100 command while listing status on incoming handshaking connections.
1101 Introduce a status name "NEW" for these connections.
1102 - If we get a linelist or linelist_s config option from the torrc
1103 (e.g. ExitPolicy) and it has no value, warn and skip rather than
1104 silently resetting it to its default.
1105 - Don't abandon entry guards until they've been down or gone for
1107 - Cleaner and quieter log messages.
1110 - New controller signal NEWNYM that makes new application requests
1112 - Add a new circuit purpose 'controller' to let the controller ask
1113 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
1114 controller command to let you specify the purpose if you're
1115 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
1116 command to let you change a circuit's purpose after it's been
1118 - Accept "private:*" in routerdesc exit policies; not generated yet
1119 because older Tors do not understand it.
1120 - Add BSD-style contributed startup script "rc.subr" from Peter
1124 Changes in version 0.1.1.14-alpha - 2006-02-20
1125 o Bugfixes on 0.1.1.x:
1126 - Don't die if we ask for a stdout or stderr log (even implicitly)
1127 and we're set to RunAsDaemon -- just warn.
1128 - We still had a few bugs in the OR connection rotation code that
1129 caused directory servers to slowly aggregate connections to other
1130 fast Tor servers. This time for sure!
1131 - Make log entries on Win32 include the name of the function again.
1132 - We were treating a pair of exit policies if they were equal even
1133 if one said accept and the other said reject -- causing us to
1134 not always publish a new descriptor since we thought nothing
1136 - Retry pending server downloads as well as pending networkstatus
1137 downloads when we unexpectedly get a socks request.
1138 - We were ignoring the IS_FAST flag in the directory status,
1139 meaning we were willing to pick trivial-bandwidth nodes for "fast"
1141 - If the controller's SAVECONF command fails (e.g. due to file
1142 permissions), let the controller know that it failed.
1145 - If we're trying to be a Tor server and running Windows 95/98/ME
1146 as a server, explain that we'll likely crash.
1147 - When we're a server, a client asks for an old-style directory,
1148 and our write bucket is empty, don't give it to him. This way
1149 small servers can continue to serve the directory *sometimes*,
1150 without getting overloaded.
1151 - Compress exit policies even more -- look for duplicate lines
1153 - Clients now honor the "guard" flag in the router status when
1154 picking entry guards, rather than looking at is_fast or is_stable.
1155 - Retain unrecognized lines in $DATADIR/state file, so that we can
1156 be forward-compatible.
1157 - Generate 18.0.0.0/8 address policy format in descs when we can;
1158 warn when the mask is not reducible to a bit-prefix.
1159 - Let the user set ControlListenAddress in the torrc. This can be
1160 dangerous, but there are some cases (like a secured LAN) where it
1162 - Split ReachableAddresses into ReachableDirAddresses and
1163 ReachableORAddresses, so we can restrict Dir conns to port 80
1164 and OR conns to port 443.
1165 - Now we can target arch and OS in rpm builds (contributed by
1166 Phobos). Also make the resulting dist-rpm filename match the
1168 - New config options to help controllers: FetchServerDescriptors
1169 and FetchHidServDescriptors for whether to fetch server
1170 info and hidserv info or let the controller do it, and
1171 PublishServerDescriptor and PublishHidServDescriptors.
1172 - Also let the controller set the __AllDirActionsPrivate config
1173 option if you want all directory fetches/publishes to happen via
1174 Tor (it assumes your controller bootstraps your circuits).
1177 Changes in version 0.1.0.17 - 2006-02-17
1178 o Crash bugfixes on 0.1.0.x:
1179 - When servers with a non-zero DirPort came out of hibernation,
1180 sometimes they would trigger an assert.
1182 o Other important bugfixes:
1183 - On platforms that don't have getrlimit (like Windows), we were
1184 artificially constraining ourselves to a max of 1024
1185 connections. Now just assume that we can handle as many as 15000
1186 connections. Hopefully this won't cause other problems.
1188 o Backported features:
1189 - When we're a server, a client asks for an old-style directory,
1190 and our write bucket is empty, don't give it to him. This way
1191 small servers can continue to serve the directory *sometimes*,
1192 without getting overloaded.
1193 - Whenever you get a 503 in response to a directory fetch, try
1194 once more. This will become important once servers start sending
1195 503's whenever they feel busy.
1196 - Fetch a new directory every 120 minutes, not every 40 minutes.
1197 Now that we have hundreds of thousands of users running the old
1198 directory algorithm, it's starting to hurt a lot.
1199 - Bump up the period for forcing a hidden service descriptor upload
1200 from 20 minutes to 1 hour.
1203 Changes in version 0.1.1.13-alpha - 2006-02-09
1204 o Crashes in 0.1.1.x:
1205 - When you tried to setconf ORPort via the controller, Tor would
1206 crash. So people using TorCP to become a server were sad.
1207 - Solve (I hope) the stack-smashing bug that we were seeing on fast
1208 servers. The problem appears to be something do with OpenSSL's
1209 random number generation, or how we call it, or something. Let me
1210 know if the crashes continue.
1211 - Turn crypto hardware acceleration off by default, until we find
1212 somebody smart who can test it for us. (It appears to produce
1213 seg faults in at least some cases.)
1214 - Fix a rare assert error when we've tried all intro points for
1215 a hidden service and we try fetching the service descriptor again:
1216 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
1219 - Fix a major load balance bug: we were round-robining in 16 KB
1220 chunks, and servers with bandwidthrate of 20 KB, while downloading
1221 a 600 KB directory, would starve their other connections. Now we
1222 try to be a bit more fair.
1223 - Dir authorities and mirrors were never expiring the newest
1224 descriptor for each server, causing memory and directory bloat.
1225 - Fix memory-bloating and connection-bloating bug on servers: We
1226 were never closing any connection that had ever had a circuit on
1227 it, because we were checking conn->n_circuits == 0, yet we had a
1228 bug that let it go negative.
1229 - Make Tor work using squid as your http proxy again -- squid
1230 returns an error if you ask for a URL that's too long, and it uses
1231 a really generic error message. Plus, many people are behind a
1232 transparent squid so they don't even realize it.
1233 - On platforms that don't have getrlimit (like Windows), we were
1234 artificially constraining ourselves to a max of 1024
1235 connections. Now just assume that we can handle as many as 15000
1236 connections. Hopefully this won't cause other problems.
1237 - Add a new config option ExitPolicyRejectPrivate which defaults to
1238 1. This means all exit policies will begin with rejecting private
1239 addresses, unless the server operator explicitly turns it off.
1242 - Clients not longer download descriptors for non-running
1244 - Before we add new directory authorities, we should make it
1245 clear that only v1 authorities should receive/publish hidden
1246 service descriptors.
1249 - As soon as we've fetched some more directory info, immediately
1250 try to download more server descriptors. This way we don't have
1251 a 10 second pause during initial bootstrapping.
1252 - Remove even more loud log messages that the server operator can't
1254 - When we're running an obsolete or un-recommended version, make
1255 the log message more clear about what the problem is and what
1256 versions *are* still recommended.
1257 - Provide a more useful warn message when our onion queue gets full:
1258 the CPU is too slow or the exit policy is too liberal.
1259 - Don't warn when we receive a 503 from a dirserver/cache -- this
1260 will pave the way for them being able to refuse if they're busy.
1261 - When we fail to bind a listener, try to provide a more useful
1262 log message: e.g., "Is Tor already running?"
1263 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
1264 Goldberg can prove things about our handshake protocol more
1266 - MaxConn has been obsolete for a while now. Document the ConnLimit
1267 config option, which is a *minimum* number of file descriptors
1268 that must be available else Tor refuses to start.
1269 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
1270 if you log to syslog and want something other than LOG_DAEMON.
1271 - Make dirservers generate a separate "guard" flag to mean,
1272 "would make a good entry guard". Make clients parse it and vote
1273 on it. Not used by clients yet.
1274 - Implement --with-libevent-dir option to ./configure. Also, improve
1275 search techniques to find libevent, and use those for openssl too.
1276 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
1277 - Only start testing reachability once we've established a
1278 circuit. This will make startup on dirservers less noisy.
1279 - Don't try to upload hidden service descriptors until we have
1280 established a circuit.
1281 - Fix the controller's "attachstream 0" command to treat conn like
1282 it just connected, doing address remapping, handling .exit and
1283 .onion idioms, and so on. Now we're more uniform in making sure
1284 that the controller hears about new and closing connections.
1287 Changes in version 0.1.1.12-alpha - 2006-01-11
1288 o Bugfixes on 0.1.1.x:
1289 - The fix to close duplicate server connections was closing all
1290 Tor client connections if they didn't establish a circuit
1291 quickly enough. Oops.
1292 - Fix minor memory issue (double-free) that happened on exit.
1294 o Bugfixes on 0.1.0.x:
1295 - Tor didn't warn when it failed to open a log file.
1298 Changes in version 0.1.1.11-alpha - 2006-01-10
1299 o Crashes in 0.1.1.x:
1300 - Include all the assert/crash fixes from 0.1.0.16.
1301 - If you start Tor and then quit very quickly, there were some
1302 races that tried to free things that weren't allocated yet.
1303 - Fix a rare memory stomp if you're running hidden services.
1304 - Fix segfault when specifying DirServer in config without nickname.
1305 - Fix a seg fault when you finish connecting to a server but at
1306 that moment you dump his server descriptor.
1307 - Extendcircuit and Attachstream controller commands would
1308 assert/crash if you don't give them enough arguments.
1309 - Fix an assert error when we're out of space in the connection_list
1310 and we try to post a hidden service descriptor (reported by weasel).
1311 - If you specify a relative torrc path and you set RunAsDaemon in
1312 your torrc, then it chdir()'s to the new directory. If you HUP,
1313 it tries to load the new torrc location, fails, and exits.
1314 The fix: no longer allow a relative path to torrc using -f.
1317 - Implement "entry guards": automatically choose a handful of entry
1318 nodes and stick with them for all circuits. Only pick new guards
1319 when the ones you have are unsuitable, and if the old guards
1320 become suitable again, switch back. This will increase security
1321 dramatically against certain end-point attacks. The EntryNodes
1322 config option now provides some hints about which entry guards you
1323 want to use most; and StrictEntryNodes means to only use those.
1324 - New directory logic: download by descriptor digest, not by
1325 fingerprint. Caches try to download all listed digests from
1326 authorities; clients try to download "best" digests from caches.
1327 This avoids partitioning and isolating attacks better.
1328 - Make the "stable" router flag in network-status be the median of
1329 the uptimes of running valid servers, and make clients pay
1330 attention to the network-status flags. Thus the cutoff adapts
1331 to the stability of the network as a whole, making IRC, IM, etc
1332 connections more reliable.
1335 - Tor servers with dynamic IP addresses were needing to wait 18
1336 hours before they could start doing reachability testing using
1337 the new IP address and ports. This is because they were using
1338 the internal descriptor to learn what to test, yet they were only
1339 rebuilding the descriptor once they decided they were reachable.
1340 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
1341 to download certain server descriptors, throw them away, and then
1342 fetch them again after 30 minutes. Now mirrors throw away these
1343 server descriptors so clients can't get them.
1344 - We were leaving duplicate connections to other ORs open for a week,
1345 rather than closing them once we detect a duplicate. This only
1346 really affected authdirservers, but it affected them a lot.
1347 - Spread the authdirservers' reachability testing over the entire
1348 testing interval, so we don't try to do 500 TLS's at once every
1352 - If the network is down, and we try to connect to a conn because
1353 we have a circuit in mind, and we timeout (30 seconds) because the
1354 network never answers, we were expiring the circuit, but we weren't
1355 obsoleting the connection or telling the entry_guards functions.
1356 - Some Tor servers process billions of cells per day. These statistics
1357 need to be uint64_t's.
1358 - Check for integer overflows in more places, when adding elements
1359 to smartlists. This could possibly prevent a buffer overflow
1360 on malicious huge inputs. I don't see any, but I haven't looked
1362 - ReachableAddresses kept growing new "reject *:*" lines on every
1364 - When you "setconf log" via the controller, it should remove all
1365 logs. We were automatically adding back in a "log notice stdout".
1366 - Newly bootstrapped Tor networks couldn't establish hidden service
1367 circuits until they had nodes with high uptime. Be more tolerant.
1368 - We were marking servers down when they could not answer every piece
1369 of the directory request we sent them. This was far too harsh.
1370 - Fix the torify (tsocks) config file to not use Tor for localhost
1372 - Directory authorities now go to the proper authority when asking for
1373 a networkstatus, even when they want a compressed one.
1374 - Fix a harmless bug that was causing Tor servers to log
1375 "Got an end because of misc error, but we're not an AP. Closing."
1376 - Authorities were treating their own descriptor changes as cosmetic,
1377 meaning the descriptor available in the network-status and the
1378 descriptor that clients downloaded were different.
1379 - The OS X installer was adding a symlink for tor_resolve but
1380 the binary was called tor-resolve (reported by Thomas Hardly).
1381 - Workaround a problem with some http proxies where they refuse GET
1382 requests that specify "Content-Length: 0" (reported by Adrian).
1383 - Fix wrong log message when you add a "HiddenServiceNodes" config
1384 line without any HiddenServiceDir line (reported by Chris Thomas).
1387 - Write the TorVersion into the state file so we have a prayer of
1388 keeping forward and backward compatibility.
1389 - Revive the FascistFirewall config option rather than eliminating it:
1390 now it's a synonym for ReachableAddresses *:80,*:443.
1391 - Clients choose directory servers from the network status lists,
1392 not from their internal list of router descriptors. Now they can
1393 go to caches directly rather than needing to go to authorities
1395 - Directory authorities ignore router descriptors that have only
1396 cosmetic differences: do this for 0.1.0.x servers now too.
1397 - Add a new flag to network-status indicating whether the server
1398 can answer v2 directory requests too.
1399 - Authdirs now stop whining so loudly about bad descriptors that
1400 they fetch from other dirservers. So when there's a log complaint,
1401 it's for sure from a freshly uploaded descriptor.
1402 - Reduce memory requirements in our structs by changing the order
1404 - There used to be two ways to specify your listening ports in a
1405 server descriptor: on the "router" line and with a separate "ports"
1406 line. Remove support for the "ports" line.
1407 - New config option "AuthDirRejectUnlisted" for auth dirservers as
1408 a panic button: if we get flooded with unusable servers we can
1409 revert to only listing servers in the approved-routers file.
1410 - Auth dir servers can now mark a fingerprint as "!reject" or
1411 "!invalid" in the approved-routers file (as its nickname), to
1412 refuse descriptors outright or include them but marked as invalid.
1413 - Servers store bandwidth history across restarts/crashes.
1414 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1415 get a better idea of why their circuits failed. Not used yet.
1416 - Directory mirrors now cache up to 16 unrecognized network-status
1417 docs. Now we can add new authdirservers and they'll be cached too.
1418 - When picking a random directory, prefer non-authorities if any
1420 - New controller option "getinfo desc/all-recent" to fetch the
1421 latest server descriptor for every router that Tor knows about.
1424 Changes in version 0.1.0.16 - 2006-01-02
1425 o Crash bugfixes on 0.1.0.x:
1426 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1427 corrupting the heap, losing FDs, or crashing when we need to resize
1428 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1429 - It turns out sparc64 platforms crash on unaligned memory access
1430 too -- so detect and avoid this.
1431 - Handle truncated compressed data correctly (by detecting it and
1433 - Fix possible-but-unlikely free(NULL) in control.c.
1434 - When we were closing connections, there was a rare case that
1435 stomped on memory, triggering seg faults and asserts.
1436 - Avoid potential infinite recursion when building a descriptor. (We
1437 don't know that it ever happened, but better to fix it anyway.)
1438 - We were neglecting to unlink marked circuits from soon-to-close OR
1439 connections, which caused some rare scribbling on freed memory.
1440 - Fix a memory stomping race bug when closing the joining point of two
1441 rendezvous circuits.
1442 - Fix an assert in time parsing found by Steven Murdoch.
1444 o Other bugfixes on 0.1.0.x:
1445 - When we're doing reachability testing, provide more useful log
1446 messages so the operator knows what to expect.
1447 - Do not check whether DirPort is reachable when we are suppressing
1448 advertising it because of hibernation.
1449 - When building with -static or on Solaris, we sometimes needed -ldl.
1450 - One of the dirservers (tor26) changed its IP address.
1451 - When we're deciding whether a stream has enough circuits around
1452 that can handle it, count the freshly dirty ones and not the ones
1453 that are so dirty they won't be able to handle it.
1454 - When we're expiring old circuits, we had a logic error that caused
1455 us to close new rendezvous circuits rather than old ones.
1456 - Give a more helpful log message when you try to change ORPort via
1457 the controller: you should upgrade Tor if you want that to work.
1458 - We were failing to parse Tor versions that start with "Tor ".
1459 - Tolerate faulty streams better: when a stream fails for reason
1460 exitpolicy, stop assuming that the router is lying about his exit
1461 policy. When a stream fails for reason misc, allow it to retry just
1462 as if it was resolvefailed. When a stream has failed three times,
1463 reset its failure count so we can try again and get all three tries.
1466 Changes in version 0.1.1.10-alpha - 2005-12-11
1467 o Correctness bugfixes on 0.1.0.x:
1468 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1469 corrupting the heap, losing FDs, or crashing when we need to resize
1470 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1471 - Stop doing the complex voodoo overkill checking for insecure
1472 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
1473 - When we were closing connections, there was a rare case that
1474 stomped on memory, triggering seg faults and asserts.
1475 - We were neglecting to unlink marked circuits from soon-to-close OR
1476 connections, which caused some rare scribbling on freed memory.
1477 - When we're deciding whether a stream has enough circuits around
1478 that can handle it, count the freshly dirty ones and not the ones
1479 that are so dirty they won't be able to handle it.
1480 - Recover better from TCP connections to Tor servers that are
1481 broken but don't tell you (it happens!); and rotate TLS
1482 connections once a week.
1483 - When we're expiring old circuits, we had a logic error that caused
1484 us to close new rendezvous circuits rather than old ones.
1485 - Fix a scary-looking but apparently harmless bug where circuits
1486 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1487 servers, and never switch to state CIRCUIT_STATE_OPEN.
1488 - When building with -static or on Solaris, we sometimes needed to
1490 - Give a useful message when people run Tor as the wrong user,
1491 rather than telling them to start chowning random directories.
1492 - We were failing to inform the controller about new .onion streams.
1494 o Security bugfixes on 0.1.0.x:
1495 - Refuse server descriptors if the fingerprint line doesn't match
1496 the included identity key. Tor doesn't care, but other apps (and
1497 humans) might actually be trusting the fingerprint line.
1498 - We used to kill the circuit when we receive a relay command we
1499 don't recognize. Now we just drop it.
1500 - Start obeying our firewall options more rigorously:
1501 . If we can't get to a dirserver directly, try going via Tor.
1502 . Don't ever try to connect (as a client) to a place our
1503 firewall options forbid.
1504 . If we specify a proxy and also firewall options, obey the
1505 firewall options even when we're using the proxy: some proxies
1506 can only proxy to certain destinations.
1507 - Fix a bug found by Lasse Overlier: when we were making internal
1508 circuits (intended to be cannibalized later for rendezvous and
1509 introduction circuits), we were picking them so that they had
1510 useful exit nodes. There was no need for this, and it actually
1511 aids some statistical attacks.
1512 - Start treating internal circuits and exit circuits separately.
1513 It's important to keep them separate because internal circuits
1514 have their last hops picked like middle hops, rather than like
1515 exit hops. So exiting on them will break the user's expectations.
1517 o Bugfixes on 0.1.1.x:
1518 - Take out the mis-feature where we tried to detect IP address
1519 flapping for people with DynDNS, and chose not to upload a new
1520 server descriptor sometimes.
1521 - Try to be compatible with OpenSSL 0.9.6 again.
1522 - Log fix: when the controller is logging about .onion addresses,
1523 sometimes it didn't include the ".onion" part of the address.
1524 - Don't try to modify options->DirServers internally -- if the
1525 user didn't specify any, just add the default ones directly to
1526 the trusted dirserver list. This fixes a bug where people running
1527 controllers would use SETCONF on some totally unrelated config
1528 option, and Tor would start yelling at them about changing their
1530 - Let the controller's redirectstream command specify a port, in
1531 case the controller wants to change that too.
1532 - When we requested a pile of server descriptors, we sometimes
1533 accidentally launched a duplicate request for the first one.
1534 - Bugfix for trackhostexits: write down the fingerprint of the
1535 chosen exit, not its nickname, because the chosen exit might not
1537 - When parsing foo.exit, if foo is unknown, and we are leaving
1538 circuits unattached, set the chosen_exit field and leave the
1539 address empty. This matters because controllers got confused
1541 - Directory authorities no longer try to download server
1542 descriptors that they know they will reject.
1544 o Features and updates:
1545 - Replace balanced trees with hash tables: this should make stuff
1546 significantly faster.
1547 - Resume using the AES counter-mode implementation that we ship,
1548 rather than OpenSSL's. Ours is significantly faster.
1549 - Many other CPU and memory improvements.
1550 - Add a new config option FastFirstHopPK (on by default) so clients
1551 do a trivial crypto handshake for their first hop, since TLS has
1552 already taken care of confidentiality and authentication.
1553 - Add a new config option TestSocks so people can see if their
1554 applications are using socks4, socks4a, socks5-with-ip, or
1555 socks5-with-hostname. This way they don't have to keep mucking
1556 with tcpdump and wondering if something got cached somewhere.
1557 - Warn when listening on a public address for socks. I suspect a
1558 lot of people are setting themselves up as open socks proxies,
1559 and they have no idea that jerks on the Internet are using them,
1560 since they simply proxy the traffic into the Tor network.
1561 - Add "private:*" as an alias in configuration for policies. Now
1562 you can simplify your exit policy rather than needing to list
1563 every single internal or nonroutable network space.
1564 - Add a new controller event type that allows controllers to get
1565 all server descriptors that were uploaded to a router in its role
1566 as authoritative dirserver.
1567 - Start shipping socks-extensions.txt, tor-doc-unix.html,
1568 tor-doc-server.html, and stylesheet.css in the tarball.
1569 - Stop shipping tor-doc.html in the tarball.
1572 Changes in version 0.1.1.9-alpha - 2005-11-15
1573 o Usability improvements:
1574 - Start calling it FooListenAddress rather than FooBindAddress,
1575 since few of our users know what it means to bind an address
1577 - Reduce clutter in server logs. We're going to try to make
1578 them actually usable now. New config option ProtocolWarnings that
1579 lets you hear about how _other Tors_ are breaking the protocol. Off
1581 - Divide log messages into logging domains. Once we put some sort
1582 of interface on this, it will let people looking at more verbose
1583 log levels specify the topics they want to hear more about.
1584 - Make directory servers return better http 404 error messages
1585 instead of a generic "Servers unavailable".
1586 - Check for even more Windows version flags when writing the platform
1587 string in server descriptors, and note any we don't recognize.
1588 - Clean up more of the OpenSSL memory when exiting, so we can detect
1589 memory leaks better.
1590 - Make directory authorities be non-versioning, non-naming by
1591 default. Now we can add new directory servers without requiring
1592 their operators to pay close attention.
1593 - When logging via syslog, include the pid whenever we provide
1594 a log entry. Suggested by Todd Fries.
1596 o Performance improvements:
1597 - Directory servers now silently throw away new descriptors that
1598 haven't changed much if the timestamps are similar. We do this to
1599 tolerate older Tor servers that upload a new descriptor every 15
1600 minutes. (It seemed like a good idea at the time.)
1601 - Inline bottleneck smartlist functions; use fast versions by default.
1602 - Add a "Map from digest to void*" abstraction digestmap_t so we
1603 can do less hex encoding/decoding. Use it in router_get_by_digest()
1604 to resolve a performance bottleneck.
1605 - Allow tor_gzip_uncompress to extract as much as possible from
1606 truncated compressed data. Try to extract as many
1607 descriptors as possible from truncated http responses (when
1608 DIR_PURPOSE_FETCH_ROUTERDESC).
1609 - Make circ->onionskin a pointer, not a static array. moria2 was using
1610 125000 circuit_t's after it had been up for a few weeks, which
1611 translates to 20+ megs of wasted space.
1612 - The private half of our EDH handshake keys are now chosen out
1613 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
1615 o Security improvements:
1616 - Start making directory caches retain old routerinfos, so soon
1617 clients can start asking by digest of descriptor rather than by
1618 fingerprint of server.
1619 - Add half our entropy from RAND_poll in OpenSSL. This knows how
1620 to use egd (if present), openbsd weirdness (if present), vms/os2
1621 weirdness (if we ever port there), and more in the future.
1623 o Bugfixes on 0.1.0.x:
1624 - Do round-robin writes of at most 16 kB per write. This might be
1625 more fair on loaded Tor servers, and it might resolve our Windows
1626 crash bug. It might also slow things down.
1627 - Our TLS handshakes were generating a single public/private
1628 keypair for the TLS context, rather than making a new one for
1629 each new connections. Oops. (But we were still rotating them
1630 periodically, so it's not so bad.)
1631 - When we were cannibalizing a circuit with a particular exit
1632 node in mind, we weren't checking to see if that exit node was
1633 already present earlier in the circuit. Oops.
1634 - When a Tor server's IP changes (e.g. from a dyndns address),
1635 upload a new descriptor so clients will learn too.
1636 - Really busy servers were keeping enough circuits open on stable
1637 connections that they were wrapping around the circuit_id
1638 space. (It's only two bytes.) This exposed a bug where we would
1639 feel free to reuse a circuit_id even if it still exists but has
1640 been marked for close. Try to fix this bug. Some bug remains.
1641 - If we would close a stream early (e.g. it asks for a .exit that
1642 we know would refuse it) but the LeaveStreamsUnattached config
1643 option is set by the controller, then don't close it.
1645 o Bugfixes on 0.1.1.8-alpha:
1646 - Fix a big pile of memory leaks, some of them serious.
1647 - Do not try to download a routerdesc if we would immediately reject
1649 - Resume inserting a newline between all router descriptors when
1650 generating (old style) signed directories, since our spec says
1652 - When providing content-type application/octet-stream for
1653 server descriptors using .z, we were leaving out the
1654 content-encoding header. Oops. (Everything tolerated this just
1655 fine, but that doesn't mean we need to be part of the problem.)
1656 - Fix a potential seg fault in getconf and getinfo using version 1
1657 of the controller protocol.
1658 - Avoid crash: do not check whether DirPort is reachable when we
1659 are suppressing it because of hibernation.
1660 - Make --hash-password not crash on exit.
1663 Changes in version 0.1.1.8-alpha - 2005-10-07
1664 o New features (major):
1665 - Clients don't download or use the directory anymore. Now they
1666 download and use network-statuses from the trusted dirservers,
1667 and fetch individual server descriptors as needed from mirrors.
1668 See dir-spec.txt for all the gory details.
1669 - Be more conservative about whether to advertise our DirPort.
1670 The main change is to not advertise if we're running at capacity
1671 and either a) we could hibernate or b) our capacity is low and
1672 we're using a default DirPort.
1673 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
1675 o New features (minor):
1676 - Try to be smart about when to retry network-status and
1677 server-descriptor fetches. Still needs some tuning.
1678 - Stop parsing, storing, or using running-routers output (but
1679 mirrors still cache and serve it).
1680 - Consider a threshold of versioning dirservers (dirservers who have
1681 an opinion about which Tor versions are still recommended) before
1682 deciding whether to warn the user that he's obsolete.
1683 - Dirservers can now reject/invalidate by key and IP, with the
1684 config options "AuthDirInvalid" and "AuthDirReject". This is
1685 useful since currently we automatically list servers as running
1686 and usable even if we know they're jerks.
1687 - Provide dire warnings to any users who set DirServer; move it out
1688 of torrc.sample and into torrc.complete.
1689 - Add MyFamily to torrc.sample in the server section.
1690 - Add nicknames to the DirServer line, so we can refer to them
1691 without requiring all our users to memorize their IP addresses.
1692 - When we get an EOF or a timeout on a directory connection, note
1693 how many bytes of serverdesc we are dropping. This will help
1694 us determine whether it is smart to parse incomplete serverdesc
1696 - Add a new function to "change pseudonyms" -- that is, to stop
1697 using any currently-dirty circuits for new streams, so we don't
1698 link new actions to old actions. Currently it's only called on
1699 HUP (or SIGNAL RELOAD).
1700 - On sighup, if UseHelperNodes changed to 1, use new circuits.
1701 - Start using RAND_bytes rather than RAND_pseudo_bytes from
1702 OpenSSL. Also, reseed our entropy every hour, not just at
1703 startup. And entropy in 512-bit chunks, not 160-bit chunks.
1705 o Fixes on 0.1.1.7-alpha:
1706 - Nobody ever implemented EVENT_ADDRMAP for control protocol
1707 version 0, so don't let version 0 controllers ask for it.
1708 - If you requested something with too many newlines via the
1709 v1 controller protocol, you could crash tor.
1710 - Fix a number of memory leaks, including some pretty serious ones.
1711 - Re-enable DirPort testing again, so Tor servers will be willing
1712 to advertise their DirPort if it's reachable.
1713 - On TLS handshake, only check the other router's nickname against
1714 its expected nickname if is_named is set.
1716 o Fixes forward-ported from 0.1.0.15:
1717 - Don't crash when we don't have any spare file descriptors and we
1718 try to spawn a dns or cpu worker.
1719 - Make the numbers in read-history and write-history into uint64s,
1720 so they don't overflow and publish negatives in the descriptor.
1723 - For the OS X package's modified privoxy config file, comment
1724 out the "logfile" line so we don't log everything passed
1726 - We were whining about using socks4 or socks5-with-local-lookup
1727 even when it's an IP in the "virtual" range we designed exactly
1729 - We were leaking some memory every time the client changes IPs.
1730 - Never call free() on tor_malloc()d memory. This will help us
1731 use dmalloc to detect memory leaks.
1732 - Check for named servers when looking them up by nickname;
1733 warn when we'recalling a non-named server by its nickname;
1734 don't warn twice about the same name.
1735 - Try to list MyFamily elements by key, not by nickname, and warn
1736 if we've not heard of the server.
1737 - Make windows platform detection (uname equivalent) smarter.
1738 - It turns out sparc64 doesn't like unaligned access either.
1741 Changes in version 0.1.0.15 - 2005-09-23
1742 o Bugfixes on 0.1.0.x:
1743 - Reject ports 465 and 587 (spam targets) in default exit policy.
1744 - Don't crash when we don't have any spare file descriptors and we
1745 try to spawn a dns or cpu worker.
1746 - Get rid of IgnoreVersion undocumented config option, and make us
1747 only warn, never exit, when we're running an obsolete version.
1748 - Don't try to print a null string when your server finds itself to
1749 be unreachable and the Address config option is empty.
1750 - Make the numbers in read-history and write-history into uint64s,
1751 so they don't overflow and publish negatives in the descriptor.
1752 - Fix a minor memory leak in smartlist_string_remove().
1753 - We were only allowing ourselves to upload a server descriptor at
1754 most every 20 minutes, even if it changed earlier than that.
1755 - Clean up log entries that pointed to old URLs.
1758 Changes in version 0.1.1.7-alpha - 2005-09-14
1759 o Fixes on 0.1.1.6-alpha:
1760 - Exit servers were crashing when people asked them to make a
1761 connection to an address not in their exit policy.
1762 - Looking up a non-existent stream for a v1 control connection would
1764 - Fix a seg fault if we ask a dirserver for a descriptor by
1765 fingerprint but he doesn't know about him.
1766 - SETCONF was appending items to linelists, not clearing them.
1767 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
1768 out and refuse the setconf if it would fail.
1769 - Downgrade the dirserver log messages when whining about
1773 - Add Peter Palfrader's check-tor script to tor/contrib/
1774 It lets you easily check whether a given server (referenced by
1775 nickname) is reachable by you.
1776 - Numerous changes to move towards client-side v2 directories. Not
1780 - If the user gave tor an odd number of command-line arguments,
1781 we were silently ignoring the last one. Now we complain and fail.
1782 [This wins the oldest-bug prize -- this bug has been present since
1783 November 2002, as released in Tor 0.0.0.]
1784 - Do not use unaligned memory access on alpha, mips, or mipsel.
1785 It *works*, but is very slow, so we treat them as if it doesn't.
1786 - Retry directory requests if we fail to get an answer we like
1787 from a given dirserver (we were retrying before, but only if
1788 we fail to connect).
1789 - When writing the RecommendedVersions line, sort them first.
1790 - When the client asked for a rendezvous port that the hidden
1791 service didn't want to provide, we were sending an IP address
1792 back along with the end cell. Fortunately, it was zero. But stop
1794 - Correct "your server is reachable" log entries to indicate that
1795 it was self-testing that told us so.
1798 Changes in version 0.1.1.6-alpha - 2005-09-09
1799 o Fixes on 0.1.1.5-alpha:
1800 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
1801 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
1802 - Fix bug with tor_memmem finding a match at the end of the string.
1803 - Make unit tests run without segfaulting.
1804 - Resolve some solaris x86 compile warnings.
1805 - Handle duplicate lines in approved-routers files without warning.
1806 - Fix bug where as soon as a server refused any requests due to his
1807 exit policy (e.g. when we ask for localhost and he tells us that's
1808 127.0.0.1 and he won't do it), we decided he wasn't obeying his
1809 exit policy using him for any exits.
1810 - Only do openssl hardware accelerator stuff if openssl version is
1813 o New controller features/fixes:
1814 - Add a "RESETCONF" command so you can set config options like
1815 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
1816 a config option in the torrc with no value, then it clears it
1817 entirely (rather than setting it to its default).
1818 - Add a "GETINFO config-file" to tell us where torrc is.
1819 - Avoid sending blank lines when GETINFO replies should be empty.
1820 - Add a QUIT command for the controller (for using it manually).
1821 - Fix a bug in SAVECONF that was adding default dirservers and
1822 other redundant entries to the torrc file.
1824 o Start on the new directory design:
1825 - Generate, publish, cache, serve new network-status format.
1826 - Publish individual descriptors (by fingerprint, by "all", and by
1828 - Publish client and server recommended versions separately.
1829 - Allow tor_gzip_uncompress() to handle multiple concatenated
1830 compressed strings. Serve compressed groups of router
1831 descriptors. The compression logic here could be more
1833 - Distinguish v1 authorities (all currently trusted directories)
1834 from v2 authorities (all trusted directories).
1835 - Change DirServers config line to note which dirs are v1 authorities.
1836 - Add configuration option "V1AuthoritativeDirectory 1" which
1837 moria1, moria2, and tor26 should set.
1838 - Remove option when getting directory cache to see whether they
1839 support running-routers; they all do now. Replace it with one
1840 to see whether caches support v2 stuff.
1843 - Dirservers now do their own external reachability testing of each
1844 Tor server, and only list them as running if they've been found to
1845 be reachable. We also send back warnings to the server's logs if
1846 it uploads a descriptor that we already believe is unreachable.
1847 - Implement exit enclaves: if we know an IP address for the
1848 destination, and there's a running Tor server at that address
1849 which allows exit to the destination, then extend the circuit to
1850 that exit first. This provides end-to-end encryption and end-to-end
1851 authentication. Also, if the user wants a .exit address or enclave,
1852 use 4 hops rather than 3, and cannibalize a general circ for it
1854 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
1855 controller. Also, rotate dns and cpu workers if the controller
1856 changes options that will affect them; and initialize the dns
1857 worker cache tree whether or not we start out as a server.
1858 - Only upload a new server descriptor when options change, 18
1859 hours have passed, uptime is reset, or bandwidth changes a lot.
1860 - Check [X-]Forwarded-For headers in HTTP requests when generating
1861 log messages. This lets people run dirservers (and caches) behind
1862 Apache but still know which IP addresses are causing warnings.
1864 o Config option changes:
1865 - Replace (Fascist)Firewall* config options with a new
1866 ReachableAddresses option that understands address policies.
1867 For example, "ReachableAddresses *:80,*:443"
1868 - Get rid of IgnoreVersion undocumented config option, and make us
1869 only warn, never exit, when we're running an obsolete version.
1870 - Make MonthlyAccountingStart config option truly obsolete now.
1873 - Reject ports 465 and 587 in the default exit policy, since
1874 people have started using them for spam too.
1875 - It turns out we couldn't bootstrap a network since we added
1876 reachability detection in 0.1.0.1-rc. Good thing the Tor network
1877 has never gone down. Add an AssumeReachable config option to let
1878 servers and dirservers bootstrap. When we're trying to build a
1879 high-uptime or high-bandwidth circuit but there aren't enough
1880 suitable servers, try being less picky rather than simply failing.
1881 - Our logic to decide if the OR we connected to was the right guy
1882 was brittle and maybe open to a mitm for unverified routers.
1883 - We weren't cannibalizing circuits correctly for
1884 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
1885 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
1886 build those from scratch. This should make hidden services faster.
1887 - Predict required circuits better, with an eye toward making hidden
1888 services faster on the service end.
1889 - Retry streams if the exit node sends back a 'misc' failure. This
1890 should result in fewer random failures. Also, after failing
1891 from resolve failed or misc, reset the num failures, so we give
1892 it a fair shake next time we try.
1893 - Clean up the rendezvous warn log msgs, and downgrade some to info.
1894 - Reduce severity on logs about dns worker spawning and culling.
1895 - When we're shutting down and we do something like try to post a
1896 server descriptor or rendezvous descriptor, don't complain that
1897 we seem to be unreachable. Of course we are, we're shutting down.
1898 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
1899 We don't use them yet, but maybe one day our DNS resolver will be
1900 able to discover them.
1901 - Make ContactInfo mandatory for authoritative directory servers.
1902 - Require server descriptors to list IPv4 addresses -- hostnames
1903 are no longer allowed. This also fixes some potential security
1904 problems with people providing hostnames as their address and then
1905 preferentially resolving them to partition users.
1906 - Change log line for unreachability to explicitly suggest /etc/hosts
1907 as the culprit. Also make it clearer what IP address and ports we're
1908 testing for reachability.
1909 - Put quotes around user-supplied strings when logging so users are
1910 more likely to realize if they add bad characters (like quotes)
1912 - Let auth dir servers start without specifying an Address config
1914 - Make unit tests (and other invocations that aren't the real Tor)
1915 run without launching listeners, creating subdirectories, and so on.
1918 Changes in version 0.1.1.5-alpha - 2005-08-08
1919 o Bugfixes included in 0.1.0.14.
1921 o Bugfixes on 0.1.0.x:
1922 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
1923 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
1924 it would silently using ignore the 6668.
1927 Changes in version 0.1.0.14 - 2005-08-08
1928 o Bugfixes on 0.1.0.x:
1929 - Fix the other half of the bug with crypto handshakes
1931 - Fix an assert trigger if you send a 'signal term' via the
1932 controller when it's listening for 'event info' messages.
1935 Changes in version 0.1.1.4-alpha - 2005-08-04
1936 o Bugfixes included in 0.1.0.13.
1939 - Improve tor_gettimeofday() granularity on windows.
1940 - Make clients regenerate their keys when their IP address changes.
1941 - Implement some more GETINFO goodness: expose helper nodes, config
1942 options, getinfo keys.
1945 Changes in version 0.1.0.13 - 2005-08-04
1946 o Bugfixes on 0.1.0.x:
1947 - Fix a critical bug in the security of our crypto handshakes.
1948 - Fix a size_t underflow in smartlist_join_strings2() that made
1949 it do bad things when you hand it an empty smartlist.
1950 - Fix Windows installer to ship Tor license (thanks to Aphex for
1951 pointing out this oversight) and put a link to the doc directory
1953 - Explicitly set no-unaligned-access for sparc: it turns out the
1954 new gcc's let you compile broken code, but that doesn't make it
1958 Changes in version 0.1.1.3-alpha - 2005-07-23
1959 o Bugfixes on 0.1.1.2-alpha:
1960 - Fix a bug in handling the controller's "post descriptor"
1962 - Fix several bugs in handling the controller's "extend circuit"
1964 - Fix a bug in handling the controller's "stream status" event.
1965 - Fix an assert failure if we have a controller listening for
1966 circuit events and we go offline.
1967 - Re-allow hidden service descriptors to publish 0 intro points.
1968 - Fix a crash when generating your hidden service descriptor if
1969 you don't have enough intro points already.
1971 o New features on 0.1.1.2-alpha:
1972 - New controller function "getinfo accounting", to ask how
1973 many bytes we've used in this time period.
1974 - Experimental support for helper nodes: a lot of the risk from
1975 a small static adversary comes because users pick new random
1976 nodes every time they rebuild a circuit. Now users will try to
1977 stick to the same small set of entry nodes if they can. Not
1978 enabled by default yet.
1980 o Bugfixes on 0.1.0.12:
1981 - If you're an auth dir server, always publish your dirport,
1982 even if you haven't yet found yourself to be reachable.
1983 - Fix a size_t underflow in smartlist_join_strings2() that made
1984 it do bad things when you hand it an empty smartlist.
1987 Changes in version 0.1.0.12 - 2005-07-18
1988 o New directory servers:
1989 - tor26 has changed IP address.
1991 o Bugfixes on 0.1.0.x:
1992 - Fix a possible double-free in tor_gzip_uncompress().
1993 - When --disable-threads is set, do not search for or link against
1995 - Don't trigger an assert if an authoritative directory server
1996 claims its dirport is 0.
1997 - Fix bug with removing Tor as an NT service: some people were
1998 getting "The service did not return an error." Thanks to Matt
2002 Changes in version 0.1.1.2-alpha - 2005-07-15
2003 o New directory servers:
2004 - tor26 has changed IP address.
2006 o Bugfixes on 0.1.0.x, crashes/leaks:
2007 - Port the servers-not-obeying-their-exit-policies fix from
2009 - Fix an fd leak in start_daemon().
2010 - On Windows, you can't always reopen a port right after you've
2011 closed it. So change retry_listeners() to only close and re-open
2012 ports that have changed.
2013 - Fix a possible double-free in tor_gzip_uncompress().
2015 o Bugfixes on 0.1.0.x, usability:
2016 - When tor_socketpair() fails in Windows, give a reasonable
2017 Windows-style errno back.
2018 - Let people type "tor --install" as well as "tor -install" when
2020 want to make it an NT service.
2021 - NT service patch from Matt Edman to improve error messages.
2022 - When the controller asks for a config option with an abbreviated
2023 name, give the full name in our response.
2024 - Correct the man page entry on TrackHostExitsExpire.
2025 - Looks like we were never delivering deflated (i.e. compressed)
2026 running-routers lists, even when asked. Oops.
2027 - When --disable-threads is set, do not search for or link against
2030 o Bugfixes on 0.1.1.x:
2031 - Fix a seg fault with autodetecting which controller version is
2035 - New hidden service descriptor format: put a version in it, and
2036 let people specify introduction/rendezvous points that aren't
2037 in "the directory" (which is subjective anyway).
2038 - Allow the DEBUG controller event to work again. Mark certain log
2039 entries as "don't tell this to controllers", so we avoid cycles.
2042 Changes in version 0.1.0.11 - 2005-06-30
2043 o Bugfixes on 0.1.0.x:
2044 - Fix major security bug: servers were disregarding their
2045 exit policies if clients behaved unexpectedly.
2046 - Make OS X init script check for missing argument, so we don't
2047 confuse users who invoke it incorrectly.
2048 - Fix a seg fault in "tor --hash-password foo".
2049 - The MAPADDRESS control command was broken.
2052 Changes in version 0.1.1.1-alpha - 2005-06-29
2054 - Make OS X init script check for missing argument, so we don't
2055 confuse users who invoke it incorrectly.
2056 - Fix a seg fault in "tor --hash-password foo".
2057 - Fix a possible way to DoS dirservers.
2058 - When we complain that your exit policy implicitly allows local or
2059 private address spaces, name them explicitly so operators can
2061 - Make the log message less scary when all the dirservers are
2062 temporarily unreachable.
2063 - We were printing the number of idle dns workers incorrectly when
2067 - Revised controller protocol (version 1) that uses ascii rather
2068 than binary. Add supporting libraries in python and java so you
2069 can use the controller from your applications without caring how
2071 - Spiffy new support for crypto hardware accelerators. Can somebody
2075 Changes in version 0.0.9.10 - 2005-06-16
2076 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
2077 - Refuse relay cells that claim to have a length larger than the
2078 maximum allowed. This prevents a potential attack that could read
2079 arbitrary memory (e.g. keys) from an exit server's process
2083 Changes in version 0.1.0.10 - 2005-06-14
2084 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
2085 libevent before 1.1a.
2088 Changes in version 0.1.0.9-rc - 2005-06-09
2090 - Reset buf->highwater every time buf_shrink() is called, not just on
2091 a successful shrink. This was causing significant memory bloat.
2092 - Fix buffer overflow when checking hashed passwords.
2093 - Security fix: if seeding the RNG on Win32 fails, quit.
2094 - Allow seeding the RNG on Win32 even when you're not running as
2096 - Disable threading on Solaris too. Something is wonky with it,
2097 cpuworkers, and reentrant libs.
2098 - Reenable the part of the code that tries to flush as soon as an
2099 OR outbuf has a full TLS record available. Perhaps this will make
2100 OR outbufs not grow as huge except in rare cases, thus saving lots
2101 of CPU time plus memory.
2102 - Reject malformed .onion addresses rather then passing them on as
2103 normal web requests.
2104 - Adapt patch from Adam Langley: fix possible memory leak in
2105 tor_lookup_hostname().
2106 - Initialize libevent later in the startup process, so the logs are
2107 already established by the time we start logging libevent warns.
2108 - Use correct errno on win32 if libevent fails.
2109 - Check and warn about known-bad/slow libevent versions.
2110 - Pay more attention to the ClientOnly config option.
2111 - Have torctl.in/tor.sh.in check for location of su binary (needed
2113 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
2114 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
2115 HttpProxyAuthenticator
2116 - Stop warning about sigpipes in the logs. We're going to
2117 pretend that getting these occassionally is normal and fine.
2118 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
2120 installer screens; and don't put stuff into StartupItems unless
2121 the user asks you to.
2122 - Require servers that use the default dirservers to have public IP
2123 addresses. We have too many servers that are configured with private
2124 IPs and their admins never notice the log entries complaining that
2125 their descriptors are being rejected.
2126 - Add OSX uninstall instructions. An actual uninstall script will
2130 Changes in version 0.1.0.8-rc - 2005-05-23
2132 - It turns out that kqueue on OS X 10.3.9 was causing kernel
2133 panics. Disable kqueue on all OS X Tors.
2134 - Fix RPM: remove duplicate line accidentally added to the rpm
2136 - Disable threads on openbsd too, since its gethostaddr is not
2138 - Tolerate libevent 0.8 since it still works, even though it's
2140 - Enable building on Red Hat 9.0 again.
2141 - Allow the middle hop of the testing circuit to be running any
2142 version, now that most of them have the bugfix to let them connect
2143 to unknown servers. This will allow reachability testing to work
2144 even when 0.0.9.7-0.0.9.9 become obsolete.
2145 - Handle relay cells with rh.length too large. This prevents
2146 a potential attack that could read arbitrary memory (maybe even
2147 keys) from the exit server's process.
2148 - We screwed up the dirport reachability testing when we don't yet
2149 have a cached version of the directory. Hopefully now fixed.
2150 - Clean up router_load_single_router() (used by the controller),
2151 so it doesn't seg fault on error.
2152 - Fix a minor memory leak when somebody establishes an introduction
2153 point at your Tor server.
2154 - If a socks connection ends because read fails, don't warn that
2155 you're not sending a socks reply back.
2158 - Add HttpProxyAuthenticator config option too, that works like
2159 the HttpsProxyAuthenticator config option.
2160 - Encode hashed controller passwords in hex instead of base64,
2161 to make it easier to write controllers.
2164 Changes in version 0.1.0.7-rc - 2005-05-17
2166 - Fix a bug in the OS X package installer that prevented it from
2167 installing on Tiger.
2168 - Fix a script bug in the OS X package installer that made it
2169 complain during installation.
2170 - Find libevent even if it's hiding in /usr/local/ and your
2171 CFLAGS and LDFLAGS don't tell you to look there.
2172 - Be able to link with libevent as a shared library (the default
2173 after 1.0d), even if it's hiding in /usr/local/lib and even
2174 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
2175 assuming you're running gcc. Otherwise fail and give a useful
2177 - Fix a bug in the RPM packager: set home directory for _tor to
2178 something more reasonable when first installing.
2179 - Free a minor amount of memory that is still reachable on exit.
2182 Changes in version 0.1.0.6-rc - 2005-05-14
2184 - Implement --disable-threads configure option. Disable threads on
2185 netbsd by default, because it appears to have no reentrant resolver
2187 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
2188 release (1.1) detects and disables kqueue if it's broken.
2189 - Append default exit policy before checking for implicit internal
2190 addresses. Now we don't log a bunch of complaints on startup
2191 when using the default exit policy.
2192 - Some people were putting "Address " in their torrc, and they had
2193 a buggy resolver that resolved " " to 0.0.0.0. Oops.
2194 - If DataDir is ~/.tor, and that expands to /.tor, then default to
2195 LOCALSTATEDIR/tor instead.
2196 - Fix fragmented-message bug in TorControl.py.
2197 - Resolve a minor bug which would prevent unreachable dirports
2198 from getting suppressed in the published descriptor.
2199 - When the controller gave us a new descriptor, we weren't resolving
2200 it immediately, so Tor would think its address was 0.0.0.0 until
2201 we fetched a new directory.
2202 - Fix an uppercase/lowercase case error in suppressing a bogus
2203 libevent warning on some Linuxes.
2206 - Begin scrubbing sensitive strings from logs by default. Turn off
2207 the config option SafeLogging if you need to do debugging.
2208 - Switch to a new buffer management algorithm, which tries to avoid
2209 reallocing and copying quite as much. In first tests it looks like
2210 it uses *more* memory on average, but less cpu.
2211 - First cut at support for "create-fast" cells. Clients can use
2212 these when extending to their first hop, since the TLS already
2213 provides forward secrecy and authentication. Not enabled on
2215 - When dirservers refuse a router descriptor, we now log its
2216 contactinfo, platform, and the poster's IP address.
2217 - Call tor_free_all instead of connections_free_all after forking, to
2218 save memory on systems that need to fork.
2219 - Whine at you if you're a server and you don't set your contactinfo.
2220 - Implement --verify-config command-line option to check if your torrc
2221 is valid without actually launching Tor.
2222 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
2223 rather than just rejecting it.
2226 Changes in version 0.1.0.5-rc - 2005-04-27
2228 - Stop trying to print a null pointer if an OR conn fails because
2229 we didn't like its cert.
2231 - Switch our internal buffers implementation to use a ring buffer,
2232 to hopefully improve performance for fast servers a lot.
2233 - Add HttpsProxyAuthenticator support (basic auth only), based
2234 on patch from Adam Langley.
2235 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
2236 the fast servers that have been joining lately.
2237 - Give hidden service accesses extra time on the first attempt,
2238 since 60 seconds is often only barely enough. This might improve
2240 - Improve performance for dirservers: stop re-parsing the whole
2241 directory every time you regenerate it.
2242 - Add more debugging info to help us find the weird dns freebsd
2243 pthreads bug; cleaner debug messages to help track future issues.
2246 Changes in version 0.0.9.9 - 2005-04-23
2247 o Bugfixes on 0.0.9.x:
2248 - If unofficial Tor clients connect and send weird TLS certs, our
2249 Tor server triggers an assert. This release contains a minimal
2250 backport from the broader fix that we put into 0.1.0.4-rc.
2253 Changes in version 0.1.0.4-rc - 2005-04-23
2255 - If unofficial Tor clients connect and send weird TLS certs, our
2256 Tor server triggers an assert. Stop asserting, and start handling
2257 TLS errors better in other situations too.
2258 - When the controller asks us to tell it about all the debug-level
2259 logs, it turns out we were generating debug-level logs while
2260 telling it about them, which turns into a bad loop. Now keep
2261 track of whether you're sending a debug log to the controller,
2262 and don't log when you are.
2263 - Fix the "postdescriptor" feature of the controller interface: on
2264 non-complete success, only say "done" once.
2266 - Clients are now willing to load balance over up to 2mB, not 1mB,
2267 of advertised bandwidth capacity.
2268 - Add a NoPublish config option, so you can be a server (e.g. for
2269 testing running Tor servers in other Tor networks) without
2270 publishing your descriptor to the primary dirservers.
2273 Changes in version 0.1.0.3-rc - 2005-04-08
2274 o Improvements on 0.1.0.2-rc:
2275 - Client now retries when streams end early for 'hibernating' or
2276 'resource limit' reasons, rather than failing them.
2277 - More automated handling for dirserver operators:
2278 - Automatically approve nodes running 0.1.0.2-rc or later,
2279 now that the the reachability detection stuff is working.
2280 - Now we allow two unverified servers with the same nickname
2281 but different keys. But if a nickname is verified, only that
2282 nickname+key are allowed.
2283 - If you're an authdirserver connecting to an address:port,
2284 and it's not the OR you were expecting, forget about that
2285 descriptor. If he *was* the one you were expecting, then forget
2286 about all other descriptors for that address:port.
2287 - Allow servers to publish descriptors from 12 hours in the future.
2288 Corollary: only whine about clock skew from the dirserver if
2289 he's a trusted dirserver (since now even verified servers could
2290 have quite wrong clocks).
2291 - Adjust maximum skew and age for rendezvous descriptors: let skew
2292 be 48 hours rather than 90 minutes.
2293 - Efficiency improvements:
2294 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
2295 it much faster to look up a circuit for each relay cell.
2296 - Remove most calls to assert_all_pending_dns_resolves_ok(),
2297 since they're eating our cpu on exit nodes.
2298 - Stop wasting time doing a case insensitive comparison for every
2299 dns name every time we do any lookup. Canonicalize the names to
2300 lowercase and be done with it.
2301 - Start sending 'truncated' cells back rather than destroy cells,
2302 if the circuit closes in front of you. This means we won't have
2303 to abandon partially built circuits.
2304 - Only warn once per nickname from add_nickname_list_to_smartlist
2305 per failure, so an entrynode or exitnode choice that's down won't
2307 - Put a note in the torrc about abuse potential with the default
2309 - Revise control spec and implementation to allow all log messages to
2310 be sent to controller with their severities intact (suggested by
2311 Matt Edman). Update TorControl to handle new log event types.
2312 - Provide better explanation messages when controller's POSTDESCRIPTOR
2314 - Stop putting nodename in the Platform string in server descriptors.
2315 It doesn't actually help, and it is confusing/upsetting some people.
2317 o Bugfixes on 0.1.0.2-rc:
2318 - We were printing the host mask wrong in exit policies in server
2319 descriptors. This isn't a critical bug though, since we were still
2320 obeying the exit policy internally.
2321 - Fix Tor when compiled with libevent but without pthreads: move
2322 connection_unregister() from _connection_free() to
2324 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
2325 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
2326 when we look through the connection array, we'll find any of the
2327 cpu/dnsworkers. This is no good.
2329 o Bugfixes on 0.0.9.8:
2330 - Fix possible bug on threading platforms (e.g. win32) which was
2331 leaking a file descriptor whenever a cpuworker or dnsworker died.
2332 - When using preferred entry or exit nodes, ignore whether the
2333 circuit wants uptime or capacity. They asked for the nodes, they
2335 - chdir() to your datadirectory at the *end* of the daemonize process,
2336 not the beginning. This was a problem because the first time you
2337 run tor, if your datadir isn't there, and you have runasdaemon set
2338 to 1, it will try to chdir to it before it tries to create it. Oops.
2339 - Handle changed router status correctly when dirserver reloads
2340 fingerprint file. We used to be dropping all unverified descriptors
2341 right then. The bug was hidden because we would immediately
2342 fetch a directory from another dirserver, which would include the
2343 descriptors we just dropped.
2344 - When we're connecting to an OR and he's got a different nickname/key
2345 than we were expecting, only complain loudly if we're an OP or a
2346 dirserver. Complaining loudly to the OR admins just confuses them.
2347 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
2348 artificially capped at 500kB.
2351 Changes in version 0.0.9.8 - 2005-04-07
2352 o Bugfixes on 0.0.9.x:
2353 - We have a bug that I haven't found yet. Sometimes, very rarely,
2354 cpuworkers get stuck in the 'busy' state, even though the cpuworker
2355 thinks of itself as idle. This meant that no new circuits ever got
2356 established. Here's a workaround to kill any cpuworker that's been
2357 busy for more than 100 seconds.
2360 Changes in version 0.1.0.2-rc - 2005-04-01
2361 o Bugfixes on 0.1.0.1-rc:
2362 - Fixes on reachability detection:
2363 - Don't check for reachability while hibernating.
2364 - If ORPort is reachable but DirPort isn't, still publish the
2365 descriptor, but zero out DirPort until it's found reachable.
2366 - When building testing circs for ORPort testing, use only
2367 high-bandwidth nodes, so fewer circuits fail.
2368 - Complain about unreachable ORPort separately from unreachable
2369 DirPort, so the user knows what's going on.
2370 - Make sure we only conclude ORPort reachability if we didn't
2371 initiate the conn. Otherwise we could falsely conclude that
2372 we're reachable just because we connected to the guy earlier
2373 and he used that same pipe to extend to us.
2374 - Authdirservers shouldn't do ORPort reachability detection,
2375 since they're in clique mode, so it will be rare to find a
2376 server not already connected to them.
2377 - When building testing circuits, always pick middle hops running
2378 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
2379 bug. (This is a kludge; it will go away when 0.0.9.x becomes
2381 - When we decide we're reachable, actually publish our descriptor
2383 - Fix bug in redirectstream in the controller.
2384 - Fix the state descriptor strings so logs don't claim edge streams
2385 are in a different state than they actually are.
2386 - Use recent libevent features when possible (this only really affects
2387 win32 and osx right now, because the new libevent with these
2388 features hasn't been released yet). Add code to suppress spurious
2390 - Prevent possible segfault in connection_close_unattached_ap().
2391 - Fix newlines on torrc in win32.
2392 - Improve error msgs when tor-resolve fails.
2394 o Improvements on 0.0.9.x:
2395 - New experimental script tor/contrib/ExerciseServer.py (needs more
2396 work) that uses the controller interface to build circuits and
2397 fetch pages over them. This will help us bootstrap servers that
2398 have lots of capacity but haven't noticed it yet.
2399 - New experimental script tor/contrib/PathDemo.py (needs more work)
2400 that uses the controller interface to let you choose whole paths
2402 "<hostname>.<path,separated by dots>.<length of path>.path"
2403 - When we've connected to an OR and handshaked but didn't like
2404 the result, we were closing the conn without sending destroy
2405 cells back for pending circuits. Now send those destroys.
2408 Changes in version 0.0.9.7 - 2005-04-01
2409 o Bugfixes on 0.0.9.x:
2410 - Fix another race crash bug (thanks to Glenn Fink for reporting).
2411 - Compare identity to identity, not to nickname, when extending to
2412 a router not already in the directory. This was preventing us from
2413 extending to unknown routers. Oops.
2414 - Make sure to create OS X Tor user in <500 range, so we aren't
2415 creating actual system users.
2416 - Note where connection-that-hasn't-sent-end was marked, and fix
2417 a few really loud instances of this harmless bug (it's fixed more
2421 Changes in version 0.1.0.1-rc - 2005-03-28
2423 - Add reachability testing. Your Tor server will automatically try
2424 to see if its ORPort and DirPort are reachable from the outside,
2425 and it won't upload its descriptor until it decides they are.
2426 - Handle unavailable hidden services better. Handle slow or busy
2427 hidden services better.
2428 - Add support for CONNECTing through https proxies, with "HttpsProxy"
2430 - New exit policy: accept most low-numbered ports, rather than
2431 rejecting most low-numbered ports.
2432 - More Tor controller support (still experimental). See
2433 http://tor.eff.org/doc/control-spec.txt for all the new features,
2434 including signals to emulate unix signals from any platform;
2435 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
2436 closestream; closecircuit; etc.
2437 - Make nt services work and start on startup on win32 (based on
2438 patch by Matt Edman).
2439 - Add a new AddressMap config directive to rewrite incoming socks
2440 addresses. This lets you, for example, declare an implicit
2441 required exit node for certain sites.
2442 - Add a new TrackHostExits config directive to trigger addressmaps
2443 for certain incoming socks addresses -- for sites that break when
2444 your exit keeps changing (based on patch by Mike Perry).
2445 - Redo the client-side dns cache so it's just an addressmap too.
2446 - Notice when our IP changes, and reset stats/uptime/reachability.
2447 - When an application is using socks5, give him the whole variety of
2448 potential socks5 responses (connect refused, host unreachable, etc),
2449 rather than just "success" or "failure".
2450 - A more sane version numbering system. See
2451 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
2452 - New contributed script "exitlist": a simple python script to
2453 parse directories and find Tor nodes that exit to listed
2455 - New contributed script "privoxy-tor-toggle" to toggle whether
2456 Privoxy uses Tor. Seems to be configured for Debian by default.
2457 - Report HTTP reasons to client when getting a response from directory
2458 servers -- so you can actually know what went wrong.
2459 - New config option MaxAdvertisedBandwidth which lets you advertise
2460 a low bandwidthrate (to not attract as many circuits) while still
2461 allowing a higher bandwidthrate in reality.
2463 o Robustness/stability fixes:
2464 - Make Tor use Niels Provos's libevent instead of its current
2465 poll-but-sometimes-select mess. This will let us use faster async
2466 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
2468 - pthread support now too. This was forced because when we forked,
2469 we ended up wasting a lot of duplicate ram over time. Also switch
2470 to foo_r versions of some library calls to allow reentry and
2472 - Better handling for heterogeneous / unreliable nodes:
2473 - Annotate circuits w/ whether they aim to contain high uptime nodes
2474 and/or high capacity nodes. When building circuits, choose
2476 - This means that every single node in an intro rend circuit,
2477 not just the last one, will have a minimum uptime.
2478 - New config option LongLivedPorts to indicate application streams
2479 that will want high uptime circuits.
2480 - Servers reset uptime when a dir fetch entirely fails. This
2481 hopefully reflects stability of the server's network connectivity.
2482 - If somebody starts his tor server in Jan 2004 and then fixes his
2483 clock, don't make his published uptime be a year.
2484 - Reset published uptime when you wake up from hibernation.
2485 - Introduce a notion of 'internal' circs, which are chosen without
2486 regard to the exit policy of the last hop. Intro and rendezvous
2487 circs must be internal circs, to avoid leaking information. Resolve
2488 and connect streams can use internal circs if they want.
2489 - New circuit pooling algorithm: make sure to have enough circs around
2490 to satisfy any predicted ports, and also make sure to have 2 internal
2491 circs around if we've required internal circs lately (and with high
2492 uptime if we've seen that lately too).
2493 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
2494 which describes how often we retry making new circuits if current
2495 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
2496 how long we're willing to make use of an already-dirty circuit.
2497 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
2498 circ as necessary, if there are any completed ones lying around
2499 when we try to launch one.
2500 - Make hidden services try to establish a rendezvous for 30 seconds,
2501 rather than for n (where n=3) attempts to build a circuit.
2502 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
2503 "ShutdownWaitLength".
2504 - Try to be more zealous about calling connection_edge_end when
2505 things go bad with edge conns in connection.c.
2506 - Revise tor-spec to add more/better stream end reasons.
2507 - Revise all calls to connection_edge_end to avoid sending "misc",
2508 and to take errno into account where possible.
2511 - Fix a race condition that can trigger an assert, when we have a
2512 pending create cell and an OR connection fails right then.
2513 - Fix several double-mark-for-close bugs, e.g. where we were finding
2514 a conn for a cell even if that conn is already marked for close.
2515 - Make sequence of log messages when starting on win32 with no config
2516 file more reasonable.
2517 - When choosing an exit node for a new non-internal circ, don't take
2518 into account whether it'll be useful for any pending x.onion
2519 addresses -- it won't.
2520 - Turn addr_policy_compare from a tristate to a quadstate; this should
2521 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
2522 for google.com" problem.
2523 - Make "platform" string in descriptor more accurate for Win32 servers,
2524 so it's not just "unknown platform".
2525 - Fix an edge case in parsing config options (thanks weasel).
2526 If they say "--" on the commandline, it's not an option.
2527 - Reject odd-looking addresses at the client (e.g. addresses that
2528 contain a colon), rather than having the server drop them because
2530 - tor-resolve requests were ignoring .exit if there was a working circuit
2531 they could use instead.
2532 - REUSEADDR on normal platforms means you can rebind to the port
2533 right after somebody else has let it go. But REUSEADDR on win32
2534 means to let you bind to the port _even when somebody else
2535 already has it bound_! So, don't do that on Win32.
2536 - Change version parsing logic: a version is "obsolete" if it is not
2537 recommended and (1) there is a newer recommended version in the
2538 same series, or (2) there are no recommended versions in the same
2539 series, but there are some recommended versions in a newer series.
2540 A version is "new" if it is newer than any recommended version in
2542 - Stop most cases of hanging up on a socks connection without sending
2546 - Require BandwidthRate to be at least 20kB/s for servers.
2547 - When a dirserver causes you to give a warn, mention which dirserver
2549 - New config option DirAllowPrivateAddresses for authdirservers.
2550 Now by default they refuse router descriptors that have non-IP or
2551 private-IP addresses.
2552 - Stop publishing socksport in the directory, since it's not
2553 actually meant to be public. For compatibility, publish a 0 there
2555 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
2556 smart" value, that is low for servers and high for clients.
2557 - If our clock jumps forward by 100 seconds or more, assume something
2558 has gone wrong with our network and abandon all not-yet-used circs.
2559 - Warn when exit policy implicitly allows local addresses.
2560 - If we get an incredibly skewed timestamp from a dirserver mirror
2561 that isn't a verified OR, don't warn -- it's probably him that's
2563 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
2564 cookies to disk and doesn't log each web request to disk. (Thanks
2565 to Brett Carrington for pointing this out.)
2566 - When a client asks us for a dir mirror and we don't have one,
2567 launch an attempt to get a fresh one.
2568 - If we're hibernating and we get a SIGINT, exit immediately.
2569 - Add --with-dmalloc ./configure option, to track memory leaks.
2570 - And try to free all memory on closing, so we can detect what
2572 - Cache local dns resolves correctly even when they're .exit
2574 - Give a better warning when some other server advertises an
2575 ORPort that is actually an apache running ssl.
2576 - Add "opt hibernating 1" to server descriptor to make it clearer
2577 whether the server is hibernating.
2580 Changes in version 0.0.9.6 - 2005-03-24
2581 o Bugfixes on 0.0.9.x (crashes and asserts):
2582 - Add new end stream reasons to maintainance branch. Fix bug where
2583 reason (8) could trigger an assert. Prevent bug from recurring.
2584 - Apparently win32 stat wants paths to not end with a slash.
2585 - Fix assert triggers in assert_cpath_layer_ok(), where we were
2586 blowing away the circuit that conn->cpath_layer points to, then
2587 checking to see if the circ is well-formed. Backport check to make
2588 sure we dont use the cpath on a closed connection.
2589 - Prevent circuit_resume_edge_reading_helper() from trying to package
2590 inbufs for marked-for-close streams.
2591 - Don't crash on hup if your options->address has become unresolvable.
2592 - Some systems (like OS X) sometimes accept() a connection and tell
2593 you the remote host is 0.0.0.0:0. If this happens, due to some
2594 other mis-features, we get confused; so refuse the conn for now.
2596 o Bugfixes on 0.0.9.x (other):
2597 - Fix harmless but scary "Unrecognized content encoding" warn message.
2598 - Add new stream error reason: TORPROTOCOL reason means "you are not
2599 speaking a version of Tor I understand; say bye-bye to your stream."
2600 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
2601 into the future, now that we are more tolerant of skew. This
2602 resolves a bug where a Tor server would refuse to cache a directory
2603 because all the directories it gets are too far in the future;
2604 yet the Tor server never logs any complaints about clock skew.
2605 - Mac packaging magic: make man pages useable, and do not overwrite
2606 existing torrc files.
2607 - Make OS X log happily to /var/log/tor/tor.log
2610 Changes in version 0.0.9.5 - 2005-02-22
2611 o Bugfixes on 0.0.9.x:
2612 - Fix an assert race at exit nodes when resolve requests fail.
2613 - Stop picking unverified dir mirrors--it only leads to misery.
2614 - Patch from Matt Edman to make NT services work better. Service
2615 support is still not compiled into the executable by default.
2616 - Patch from Dmitri Bely so the Tor service runs better under
2617 the win32 SYSTEM account.
2618 - Make tor-resolve actually work (?) on Win32.
2619 - Fix a sign bug when getrlimit claims to have 4+ billion
2620 file descriptors available.
2621 - Stop refusing to start when bandwidthburst == bandwidthrate.
2622 - When create cells have been on the onion queue more than five
2623 seconds, just send back a destroy and take them off the list.
2626 Changes in version 0.0.9.4 - 2005-02-03
2627 o Bugfixes on 0.0.9:
2628 - Fix an assert bug that took down most of our servers: when
2629 a server claims to have 1 GB of bandwidthburst, don't
2631 - Don't crash as badly if we have spawned the max allowed number
2632 of dnsworkers, or we're out of file descriptors.
2633 - Block more file-sharing ports in the default exit policy.
2634 - MaxConn is now automatically set to the hard limit of max
2635 file descriptors we're allowed (ulimit -n), minus a few for
2637 - Give a clearer message when servers need to raise their
2638 ulimit -n when they start running out of file descriptors.
2639 - SGI Compatibility patches from Jan Schaumann.
2640 - Tolerate a corrupt cached directory better.
2641 - When a dirserver hasn't approved your server, list which one.
2642 - Go into soft hibernation after 95% of the bandwidth is used,
2643 not 99%. This is especially important for daily hibernators who
2644 have a small accounting max. Hopefully it will result in fewer
2645 cut connections when the hard hibernation starts.
2646 - Load-balance better when using servers that claim more than
2647 800kB/s of capacity.
2648 - Make NT services work (experimental, only used if compiled in).
2651 Changes in version 0.0.9.3 - 2005-01-21
2652 o Bugfixes on 0.0.9:
2653 - Backport the cpu use fixes from main branch, so busy servers won't
2654 need as much processor time.
2655 - Work better when we go offline and then come back, or when we
2656 run Tor at boot before the network is up. We do this by
2657 optimistically trying to fetch a new directory whenever an
2658 application request comes in and we think we're offline -- the
2659 human is hopefully a good measure of when the network is back.
2660 - Backport some minimal hidserv bugfixes: keep rend circuits open as
2661 long as you keep using them; actually publish hidserv descriptors
2662 shortly after they change, rather than waiting 20-40 minutes.
2663 - Enable Mac startup script by default.
2664 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
2665 - When you update AllowUnverifiedNodes or FirewallPorts via the
2666 controller's setconf feature, we were always appending, never
2668 - When you update HiddenServiceDir via setconf, it was screwing up
2669 the order of reading the lines, making it fail.
2670 - Do not rewrite a cached directory back to the cache; otherwise we
2671 will think it is recent and not fetch a newer one on startup.
2672 - Workaround for webservers that lie about Content-Encoding: Tor
2673 now tries to autodetect compressed directories and compression
2674 itself. This lets us Proxypass dir fetches through apache.
2677 Changes in version 0.0.9.2 - 2005-01-04
2678 o Bugfixes on 0.0.9 (crashes and asserts):
2679 - Fix an assert on startup when the disk is full and you're logging
2681 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
2682 style address, then we'd crash.
2683 - Fix an assert trigger when the running-routers string we get from
2684 a dirserver is broken.
2685 - Make worker threads start and run on win32. Now win32 servers
2687 - Bandaid (not actually fix, but now it doesn't crash) an assert
2688 where the dns worker dies mysteriously and the main Tor process
2689 doesn't remember anything about the address it was resolving.
2691 o Bugfixes on 0.0.9 (Win32):
2692 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
2693 name out of the warning/assert messages.
2694 - Fix a superficial "unhandled error on read" bug on win32.
2695 - The win32 installer no longer requires a click-through for our
2696 license, since our Free Software license grants rights but does not
2698 - Win32: When connecting to a dirserver fails, try another one
2699 immediately. (This was already working for non-win32 Tors.)
2700 - Stop trying to parse $HOME on win32 when hunting for default
2702 - Make tor-resolve.c work on win32 by calling network_init().
2704 o Bugfixes on 0.0.9 (other):
2705 - Make 0.0.9.x build on Solaris again.
2706 - Due to a fencepost error, we were blowing away the \n when reporting
2707 confvalue items in the controller. So asking for multiple config
2708 values at once couldn't work.
2709 - When listing circuits that are pending on an opening OR connection,
2710 if we're an OR we were listing circuits that *end* at us as
2711 being pending on every listener, dns/cpu worker, etc. Stop that.
2712 - Dirservers were failing to create 'running-routers' or 'directory'
2713 strings if we had more than some threshold of routers. Fix them so
2714 they can handle any number of routers.
2715 - Fix a superficial "Duplicate mark for close" bug.
2716 - Stop checking for clock skew for OR connections, even for servers.
2717 - Fix a fencepost error that was chopping off the last letter of any
2718 nickname that is the maximum allowed nickname length.
2719 - Update URLs in log messages so they point to the new website.
2720 - Fix a potential problem in mangling server private keys while
2721 writing to disk (not triggered yet, as far as we know).
2722 - Include the licenses for other free software we include in Tor,
2723 now that we're shipping binary distributions more regularly.
2726 Changes in version 0.0.9.1 - 2004-12-15
2727 o Bugfixes on 0.0.9:
2728 - Make hibernation actually work.
2729 - Make HashedControlPassword config option work.
2730 - When we're reporting event circuit status to a controller,
2731 don't use the stream status code.
2734 Changes in version 0.0.9 - 2004-12-12
2736 - Clean up manpage and torrc.sample file.
2737 - Clean up severities and text of log warnings.
2739 - Make servers trigger an assert when they enter hibernation.
2742 Changes in version 0.0.9rc7 - 2004-12-08
2743 o Bugfixes on 0.0.9rc:
2744 - Fix a stack-trashing crash when an exit node begins hibernating.
2745 - Avoid looking at unallocated memory while considering which
2746 ports we need to build circuits to cover.
2747 - Stop a sigpipe: when an 'end' cell races with eof from the app,
2748 we shouldn't hold-open-until-flush if the eof arrived first.
2749 - Fix a bug with init_cookie_authentication() in the controller.
2750 - When recommending new-format log lines, if the upper bound is
2751 LOG_ERR, leave it implicit.
2753 o Bugfixes on 0.0.8.1:
2754 - Fix a whole slew of memory leaks.
2755 - Fix isspace() and friends so they still make Solaris happy
2756 but also so they don't trigger asserts on win32.
2757 - Fix parse_iso_time on platforms without strptime (eg win32).
2758 - win32: tolerate extra "readable" events better.
2759 - win32: when being multithreaded, leave parent fdarray open.
2760 - Make unit tests work on win32.
2763 Changes in version 0.0.9rc6 - 2004-12-06
2764 o Bugfixes on 0.0.9pre:
2765 - Clean up some more integer underflow opportunities (not exploitable
2767 - While hibernating, hup should not regrow our listeners.
2768 - Send an end to the streams we close when we hibernate, rather
2769 than just chopping them off.
2770 - React to eof immediately on non-open edge connections.
2772 o Bugfixes on 0.0.8.1:
2773 - Calculate timeout for waiting for a connected cell from the time
2774 we sent the begin cell, not from the time the stream started. If
2775 it took a long time to establish the circuit, we would time out
2776 right after sending the begin cell.
2777 - Fix router_compare_addr_to_addr_policy: it was not treating a port
2778 of * as always matching, so we were picking reject *:* nodes as
2779 exit nodes too. Oops.
2782 - New circuit building strategy: keep a list of ports that we've
2783 used in the past 6 hours, and always try to have 2 circuits open
2784 or on the way that will handle each such port. Seed us with port
2785 80 so web users won't complain that Tor is "slow to start up".
2786 - Make kill -USR1 dump more useful stats about circuits.
2787 - When warning about retrying or giving up, print the address, so
2788 the user knows which one it's talking about.
2789 - If you haven't used a clean circuit in an hour, throw it away,
2790 just to be on the safe side. (This means after 6 hours a totally
2791 unused Tor client will have no circuits open.)
2794 Changes in version 0.0.9rc5 - 2004-12-01
2795 o Bugfixes on 0.0.8.1:
2796 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
2797 - Let resolve conns retry/expire also, rather than sticking around
2799 - If we are using select, make sure we stay within FD_SETSIZE.
2801 o Bugfixes on 0.0.9pre:
2802 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
2803 but doesn't seem to be currently; thanks to Ilja van Sprundel for
2805 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
2806 instead. Impose minima and maxima for all *Period options; impose
2807 even tighter maxima for fetching if we are a caching dirserver.
2808 Clip rather than rejecting.
2809 - Fetch cached running-routers from servers that serve it (that is,
2810 authdirservers and servers running 0.0.9rc5-cvs or later.)
2813 - Accept *:706 (silc) in default exit policy.
2814 - Implement new versioning format for post 0.1.
2815 - Support "foo.nickname.exit" addresses, to let Alice request the
2816 address "foo" as viewed by exit node "nickname". Based on a patch
2818 - Make tor --version --version dump the cvs Id of every file.
2821 Changes in version 0.0.9rc4 - 2004-11-28
2822 o Bugfixes on 0.0.8.1:
2823 - Make windows sockets actually non-blocking (oops), and handle
2824 win32 socket errors better.
2826 o Bugfixes on 0.0.9rc1:
2827 - Actually catch the -USR2 signal.
2830 Changes in version 0.0.9rc3 - 2004-11-25
2831 o Bugfixes on 0.0.8.1:
2832 - Flush the log file descriptor after we print "Tor opening log file",
2833 so we don't see those messages days later.
2835 o Bugfixes on 0.0.9rc1:
2836 - Make tor-resolve work again.
2837 - Avoid infinite loop in tor-resolve if tor hangs up on it.
2838 - Fix an assert trigger for clients/servers handling resolves.
2841 Changes in version 0.0.9rc2 - 2004-11-24
2842 o Bugfixes on 0.0.9rc1:
2843 - I broke socks5 support while fixing the eof bug.
2844 - Allow unitless bandwidths and intervals; they default to bytes
2846 - New servers don't start out hibernating; they are active until
2847 they run out of bytes, so they have a better estimate of how
2848 long it takes, and so their operators can know they're working.
2851 Changes in version 0.0.9rc1 - 2004-11-23
2852 o Bugfixes on 0.0.8.1:
2853 - Finally fix a bug that's been plaguing us for a year:
2854 With high load, circuit package window was reaching 0. Whenever
2855 we got a circuit-level sendme, we were reading a lot on each
2856 socket, but only writing out a bit. So we would eventually reach
2857 eof. This would be noticed and acted on even when there were still
2858 bytes sitting in the inbuf.
2859 - When poll() is interrupted, we shouldn't believe the revents values.
2861 o Bugfixes on 0.0.9pre6:
2862 - Fix hibernate bug that caused pre6 to be broken.
2863 - Don't keep rephist info for routers that haven't had activity for
2864 24 hours. (This matters now that clients have keys, since we track
2866 - Never call close_temp_logs while validating log options.
2867 - Fix backslash-escaping on tor.sh.in and torctl.in.
2870 - Implement weekly/monthly/daily accounting: now you specify your
2871 hibernation properties by
2872 AccountingMax N bytes|KB|MB|GB|TB
2873 AccountingStart day|week|month [day] HH:MM
2874 Defaults to "month 1 0:00".
2875 - Let bandwidth and interval config options be specified as 5 bytes,
2876 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
2877 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
2878 get back to normal.)
2879 - If your requested entry or exit node has advertised bandwidth 0,
2881 - Be more greedy about filling up relay cells -- we try reading again
2882 once we've processed the stuff we read, in case enough has arrived
2883 to fill the last cell completely.
2884 - Apply NT service patch from Osamu Fujino. Still needs more work.
2887 Changes in version 0.0.9pre6 - 2004-11-15
2888 o Bugfixes on 0.0.8.1:
2889 - Fix assert failure on malformed socks4a requests.
2890 - Use identity comparison, not nickname comparison, to choose which
2891 half of circuit-ID-space each side gets to use. This is needed
2892 because sometimes we think of a router as a nickname, and sometimes
2893 as a hex ID, and we can't predict what the other side will do.
2894 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
2895 write() call will fail and we handle it there.
2896 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
2897 and smartlist_len, which are two major profiling offenders.
2899 o Bugfixes on 0.0.9pre5:
2900 - Fix a bug in read_all that was corrupting config files on windows.
2901 - When we're raising the max number of open file descriptors to
2902 'unlimited', don't log that we just raised it to '-1'.
2903 - Include event code with events, as required by control-spec.txt.
2904 - Don't give a fingerprint when clients do --list-fingerprint:
2905 it's misleading, because it will never be the same again.
2906 - Stop using strlcpy in tor_strndup, since it was slowing us
2908 - Remove warn on startup about missing cached-directory file.
2909 - Make kill -USR1 work again.
2910 - Hibernate if we start tor during the "wait for wakeup-time" phase
2911 of an accounting interval. Log our hibernation plans better.
2912 - Authoritative dirservers now also cache their directory, so they
2913 have it on start-up.
2916 - Fetch running-routers; cache running-routers; compress
2917 running-routers; serve compressed running-routers.z
2918 - Add NSI installer script contributed by J Doe.
2919 - Commit VC6 and VC7 workspace/project files.
2920 - Commit a tor.spec for making RPM files, with help from jbash.
2921 - Add contrib/torctl.in contributed by Glenn Fink.
2922 - Implement the control-spec's SAVECONF command, to write your
2923 configuration to torrc.
2924 - Get cookie authentication for the controller closer to working.
2925 - Include control-spec.txt in the tarball.
2926 - When set_conf changes our server descriptor, upload a new copy.
2927 But don't upload it too often if there are frequent changes.
2928 - Document authentication config in man page, and document signals
2930 - Clean up confusing parts of man page and torrc.sample.
2931 - Make expand_filename handle ~ and ~username.
2932 - Use autoconf to enable largefile support where necessary. Use
2933 ftello where available, since ftell can fail at 2GB.
2934 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
2935 log more informatively.
2936 - Give a slightly more useful output for "tor -h".
2937 - Refuse application socks connections to port 0.
2938 - Check clock skew for verified servers, but allow unverified
2939 servers and clients to have any clock skew.
2940 - Break DirFetchPostPeriod into:
2941 - DirFetchPeriod for fetching full directory,
2942 - StatusFetchPeriod for fetching running-routers,
2943 - DirPostPeriod for posting server descriptor,
2944 - RendPostPeriod for posting hidden service descriptors.
2945 - Make sure the hidden service descriptors are at a random offset
2946 from each other, to hinder linkability.
2949 Changes in version 0.0.9pre5 - 2004-11-09
2950 o Bugfixes on 0.0.9pre4:
2951 - Fix a seg fault in unit tests (doesn't affect main program).
2952 - Fix an assert bug where a hidden service provider would fail if
2953 the first hop of his rendezvous circuit was down.
2954 - Hidden service operators now correctly handle version 1 style
2955 INTRODUCE1 cells (nobody generates them still, so not a critical
2957 - If do_hup fails, actually notice.
2958 - Handle more errnos from accept() without closing the listener.
2959 Some OpenBSD machines were closing their listeners because
2960 they ran out of file descriptors.
2961 - Send resolve cells to exit routers that are running a new
2962 enough version of the resolve code to work right.
2963 - Better handling of winsock includes on non-MSV win32 compilers.
2964 - Some people had wrapped their tor client/server in a script
2965 that would restart it whenever it died. This did not play well
2966 with our "shut down if your version is obsolete" code. Now people
2967 don't fetch a new directory if their local cached version is
2969 - Make our autogen.sh work on ksh as well as bash.
2972 - Hibernation: New config option "AccountingMaxKB" lets you
2973 set how many KBytes per month you want to allow your server to
2974 consume. Rather than spreading those bytes out evenly over the
2975 month, we instead hibernate for some of the month and pop up
2976 at a deterministic time, work until the bytes are consumed, then
2977 hibernate again. Config option "MonthlyAccountingStart" lets you
2978 specify which day of the month your billing cycle starts on.
2979 - Control interface: a separate program can now talk to your
2980 client/server over a socket, and get/set config options, receive
2981 notifications of circuits and streams starting/finishing/dying,
2982 bandwidth used, etc. The next step is to get some GUIs working.
2983 Let us know if you want to help out. See doc/control-spec.txt .
2984 - Ship a contrib/tor-control.py as an example script to interact
2985 with the control port.
2986 - "tor --hash-password zzyxz" will output a salted password for
2987 use in authenticating to the control interface.
2988 - New log format in config:
2989 "Log minsev[-maxsev] stdout|stderr|syslog" or
2990 "Log minsev[-maxsev] file /var/foo"
2993 - DirPolicy config option, to let people reject incoming addresses
2994 from their dirserver.
2995 - "tor --list-fingerprint" will list your identity key fingerprint
2997 - Add "pass" target for RedirectExit, to make it easier to break
2998 out of a sequence of RedirectExit rules.
2999 - Clients now generate a TLS cert too, in preparation for having
3000 them act more like real nodes.
3001 - Ship src/win32/ in the tarball, so people can use it to build.
3002 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
3004 - New "router-status" line in directory, to better bind each verified
3005 nickname to its identity key.
3006 - Deprecate unofficial config option abbreviations, and abbreviations
3007 not on the command line.
3008 - Add a pure-C tor-resolve implementation.
3009 - Use getrlimit and friends to ensure we can reach MaxConn (currently
3010 1024) file descriptors.
3012 o Code security improvements, inspired by Ilja:
3013 - Replace sprintf with snprintf. (I think they were all safe, but
3015 - Replace strcpy/strncpy with strlcpy in more places.
3016 - Avoid strcat; use snprintf or strlcat instead.
3017 - snprintf wrapper with consistent (though not C99) overflow behavior.
3020 Changes in version 0.0.9pre4 - 2004-10-17
3021 o Bugfixes on 0.0.9pre3:
3022 - If the server doesn't specify an exit policy, use the real default
3023 exit policy, not reject *:*.
3024 - Ignore fascistfirewall when uploading/downloading hidden service
3025 descriptors, since we go through Tor for those; and when using
3026 an HttpProxy, since we assume it can reach them all.
3027 - When looking for an authoritative dirserver, use only the ones
3028 configured at boot. Don't bother looking in the directory.
3029 - The rest of the fix for get_default_conf_file() on older win32.
3030 - Make 'Routerfile' config option obsolete.
3033 - New 'MyFamily nick1,...' config option for a server to
3034 specify other servers that shouldn't be used in the same circuit
3035 with it. Only believed if nick1 also specifies us.
3036 - New 'NodeFamily nick1,nick2,...' config option for a client to
3037 specify nodes that it doesn't want to use in the same circuit.
3038 - New 'Redirectexit pattern address:port' config option for a
3039 server to redirect exit connections, e.g. to a local squid.
3042 Changes in version 0.0.9pre3 - 2004-10-13
3043 o Bugfixes on 0.0.8.1:
3044 - Better torrc example lines for dirbindaddress and orbindaddress.
3045 - Improved bounds checking on parsed ints (e.g. config options and
3046 the ones we find in directories.)
3047 - Better handling of size_t vs int, so we're more robust on 64
3049 - Fix the rest of the bug where a newly started OR would appear
3050 as unverified even after we've added his fingerprint and hupped
3052 - Fix a bug from 0.0.7: when read() failed on a stream, we would
3053 close it without sending back an end. So 'connection refused'
3054 would simply be ignored and the user would get no response.
3056 o Bugfixes on 0.0.9pre2:
3057 - Serving the cached-on-disk directory to people is bad. We now
3058 provide no directory until we've fetched a fresh one.
3059 - Workaround for bug on windows where cached-directories get crlf
3061 - Make get_default_conf_file() work on older windows too.
3062 - If we write a *:* exit policy line in the descriptor, don't write
3063 any more exit policy lines.
3066 - Use only 0.0.9pre1 and later servers for resolve cells.
3067 - Make the dirservers file obsolete.
3068 - Include a dir-signing-key token in directories to tell the
3069 parsing entity which key is being used to sign.
3070 - Remove the built-in bulky default dirservers string.
3071 - New config option "Dirserver %s:%d [fingerprint]", which can be
3072 repeated as many times as needed. If no dirservers specified,
3073 default to moria1,moria2,tor26.
3074 - Make moria2 advertise a dirport of 80, so people behind firewalls
3075 will be able to get a directory.
3076 - Http proxy support
3077 - Dirservers translate requests for http://%s:%d/x to /x
3078 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
3079 be routed through this host.
3080 - Clients ask for /tor/x rather than /x for new enough dirservers.
3081 This way we can one day coexist peacefully with apache.
3082 - Clients specify a "Host: %s%d" http header, to be compatible
3083 with more proxies, and so running squid on an exit node can work.
3086 Changes in version 0.0.8.1 - 2004-10-13
3088 - Fix a seg fault that can be triggered remotely for Tor
3089 clients/servers with an open dirport.
3090 - Fix a rare assert trigger, where routerinfos for entries in
3091 our cpath would expire while we're building the path.
3092 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3093 - Fix a rare seg fault for people running hidden services on
3094 intermittent connections.
3095 - Fix a bug in parsing opt keywords with objects.
3096 - Fix a stale pointer assert bug when a stream detaches and
3098 - Fix a string format vulnerability (probably not exploitable)
3099 in reporting stats locally.
3100 - Fix an assert trigger: sometimes launching circuits can fail
3101 immediately, e.g. because too many circuits have failed recently.
3102 - Fix a compile warning on 64 bit platforms.
3105 Changes in version 0.0.9pre2 - 2004-10-03
3107 - Make fetching a cached directory work for 64-bit platforms too.
3108 - Make zlib.h a required header, not an optional header.
3111 Changes in version 0.0.9pre1 - 2004-10-01
3113 - Stop using separate defaults for no-config-file and
3114 empty-config-file. Now you have to explicitly turn off SocksPort,
3115 if you don't want it open.
3116 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3117 - Improve man page to mention more of the 0.0.8 features.
3118 - Fix a rare seg fault for people running hidden services on
3119 intermittent connections.
3120 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
3122 - Fix more dns related bugs: send back resolve_failed and end cells
3123 more reliably when the resolve fails, rather than closing the
3124 circuit and then trying to send the cell. Also attach dummy resolve
3125 connections to a circuit *before* calling dns_resolve(), to fix
3126 a bug where cached answers would never be sent in RESOLVED cells.
3127 - When we run out of disk space, or other log writing error, don't
3128 crash. Just stop logging to that log and continue.
3129 - We were starting to daemonize before we opened our logs, so if
3130 there were any problems opening logs, we would complain to stderr,
3131 which wouldn't work, and then mysteriously exit.
3132 - Fix a rare bug where sometimes a verified OR would connect to us
3133 before he'd uploaded his descriptor, which would cause us to
3134 assign conn->nickname as though he's unverified. Now we look through
3135 the fingerprint list to see if he's there.
3136 - Fix a rare assert trigger, where routerinfos for entries in
3137 our cpath would expire while we're building the path.
3140 - Clients can ask dirservers for /dir.z to get a compressed version
3141 of the directory. Only works for servers running 0.0.9, of course.
3142 - Make clients cache directories and use them to seed their router
3143 lists at startup. This means clients have a datadir again.
3144 - Configuration infrastructure support for warning on obsolete
3146 - Respond to content-encoding headers by trying to uncompress as
3148 - Reply with a deflated directory when a client asks for "dir.z".
3149 We could use allow-encodings instead, but allow-encodings isn't
3150 specified in HTTP 1.0.
3151 - Raise the max dns workers from 50 to 100.
3152 - Discourage people from setting their dirfetchpostperiod more often
3153 than once per minute.
3154 - Protect dirservers from overzealous descriptor uploading -- wait
3155 10 seconds after directory gets dirty, before regenerating.
3158 Changes in version 0.0.8 - 2004-08-25
3159 o Port it to SunOS 5.9 / Athena
3162 Changes in version 0.0.8rc2 - 2004-08-20
3163 o Make it compile on cygwin again.
3164 o When picking unverified routers, skip those with low uptime and/or
3165 low bandwidth, depending on what properties you care about.
3168 Changes in version 0.0.8rc1 - 2004-08-18
3169 o Changes from 0.0.7.3:
3171 - Fix assert triggers: if the other side returns an address 0.0.0.0,
3172 don't put it into the client dns cache.
3173 - If a begin failed due to exit policy, but we believe the IP address
3174 should have been allowed, switch that router to exitpolicy reject *:*
3175 until we get our next directory.
3177 - Clients choose nodes proportional to advertised bandwidth.
3178 - Avoid using nodes with low uptime as introduction points.
3179 - Handle servers with dynamic IP addresses: don't replace
3180 options->Address with the resolved one at startup, and
3181 detect our address right before we make a routerinfo each time.
3182 - 'FascistFirewall' option to pick dirservers and ORs on specific
3183 ports; plus 'FirewallPorts' config option to tell FascistFirewall
3184 which ports are open. (Defaults to 80,443)
3185 - Be more aggressive about trying to make circuits when the network
3186 has changed (e.g. when you unsuspend your laptop).
3187 - Check for time skew on http headers; report date in response to
3189 - If the entrynode config line has only one node, don't pick it as
3191 - Add strict{entry|exit}nodes config options. If set to 1, then
3192 we refuse to build circuits that don't include the specified entry
3194 - OutboundBindAddress config option, to bind to a specific
3195 IP address for outgoing connect()s.
3196 - End truncated log entries (e.g. directories) with "[truncated]".
3198 o Patches to 0.0.8preX:
3200 - Patches to compile and run on win32 again (maybe)?
3201 - Fix crash when looking for ~/.torrc with no $HOME set.
3202 - Fix a race bug in the unit tests.
3203 - Handle verified/unverified name collisions better when new
3204 routerinfo's arrive in a directory.
3205 - Sometimes routers were getting entered into the stats before
3206 we'd assigned their identity_digest. Oops.
3207 - Only pick and establish intro points after we've gotten a
3210 - AllowUnverifiedNodes config option to let circuits choose no-name
3211 routers in entry,middle,exit,introduction,rendezvous positions.
3212 Allow middle and rendezvous positions by default.
3213 - Add a man page for tor-resolve.
3216 Changes in version 0.0.7.3 - 2004-08-12
3217 o Stop dnsworkers from triggering an assert failure when you
3218 ask them to resolve the host "".
3221 Changes in version 0.0.8pre3 - 2004-08-09
3222 o Changes from 0.0.7.2:
3223 - Allow multiple ORs with same nickname in routerlist -- now when
3224 people give us one identity key for a nickname, then later
3225 another, we don't constantly complain until the first expires.
3226 - Remember used bandwidth (both in and out), and publish 15-minute
3227 snapshots for the past day into our descriptor.
3228 - You can now fetch $DIRURL/running-routers to get just the
3229 running-routers line, not the whole descriptor list. (But
3230 clients don't use this yet.)
3231 - When people mistakenly use Tor as an http proxy, point them
3232 at the tor-doc.html rather than the INSTALL.
3233 - Remove our mostly unused -- and broken -- hex_encode()
3234 function. Use base16_encode() instead. (Thanks to Timo Lindfors
3235 for pointing out this bug.)
3236 - Rotate onion keys every 12 hours, not every 2 hours, so we have
3237 fewer problems with people using the wrong key.
3238 - Change the default exit policy to reject the default edonkey,
3239 kazaa, gnutella ports.
3240 - Add replace_file() to util.[ch] to handle win32's rename().
3242 o Changes from 0.0.8preX:
3243 - Fix two bugs in saving onion keys to disk when rotating, so
3244 hopefully we'll get fewer people using old onion keys.
3245 - Fix an assert error that was making SocksPolicy not work.
3246 - Be willing to expire routers that have an open dirport -- it's
3247 just the authoritative dirservers we want to not forget.
3248 - Reject tor-resolve requests for .onion addresses early, so we
3249 don't build a whole rendezvous circuit and then fail.
3250 - When you're warning a server that he's unverified, don't cry
3252 - Fix a race condition: don't try to extend onto a connection
3253 that's still handshaking.
3254 - For servers in clique mode, require the conn to be open before
3255 you'll choose it for your path.
3256 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
3257 end relay cell, etc.
3258 - Measure bandwidth capacity over the last 24 hours, not just 12
3259 - Bugfix: authoritative dirservers were making and signing a new
3260 directory for each client, rather than reusing the cached one.
3263 Changes in version 0.0.8pre2 - 2004-08-04
3264 o Changes from 0.0.7.2:
3266 - Check directory signature _before_ you decide whether you're
3267 you're running an obsolete version and should exit.
3268 - Check directory signature _before_ you parse the running-routers
3269 list to decide who's running or verified.
3270 - Bugfixes and features:
3271 - Check return value of fclose while writing to disk, so we don't
3272 end up with broken files when servers run out of disk space.
3273 - Log a warning if the user uses an unsafe socks variant, so people
3274 are more likely to learn about privoxy or socat.
3275 - Dirservers now include RFC1123-style dates in the HTTP headers,
3276 which one day we will use to better detect clock skew.
3278 o Changes from 0.0.8pre1:
3279 - Make it compile without warnings again on win32.
3280 - Log a warning if you're running an unverified server, to let you
3281 know you might want to get it verified.
3282 - Only pick a default nickname if you plan to be a server.
3285 Changes in version 0.0.8pre1 - 2004-07-23
3287 - Made our unit tests compile again on OpenBSD 3.5, and tor
3288 itself compile again on OpenBSD on a sparc64.
3289 - We were neglecting milliseconds when logging on win32, so
3290 everything appeared to happen at the beginning of each second.
3293 - 'Extend' relay cell payloads now include the digest of the
3294 intended next hop's identity key. Now we can verify that we're
3295 extending to the right router, and also extend to routers we
3296 hadn't heard of before.
3299 - Tor nodes can now act as relays (with an advertised ORPort)
3300 without being manually verified by the dirserver operators.
3301 - Uploaded descriptors of unverified routers are now accepted
3302 by the dirservers, and included in the directory.
3303 - Verified routers are listed by nickname in the running-routers
3304 list; unverified routers are listed as "$<fingerprint>".
3305 - We now use hash-of-identity-key in most places rather than
3306 nickname or addr:port, for improved security/flexibility.
3307 - To avoid Sybil attacks, paths still use only verified servers.
3308 But now we have a chance to play around with hybrid approaches.
3309 - Nodes track bandwidth usage to estimate capacity (not used yet).
3310 - ClientOnly option for nodes that never want to become servers.
3311 - Directory caching.
3312 - "AuthoritativeDir 1" option for the official dirservers.
3313 - Now other nodes (clients and servers) will cache the latest
3314 directory they've pulled down.
3315 - They can enable their DirPort to serve it to others.
3316 - Clients will pull down a directory from any node with an open
3317 DirPort, and check the signature/timestamp correctly.
3318 - Authoritative dirservers now fetch directories from other
3319 authdirservers, to stay better synced.
3320 - Running-routers list tells who's down also, along with noting
3321 if they're verified (listed by nickname) or unverified (listed
3323 - Allow dirservers to serve running-router list separately.
3324 This isn't used yet.
3325 - ORs connect-on-demand to other ORs
3326 - If you get an extend cell to an OR you're not connected to,
3327 connect, handshake, and forward the create cell.
3328 - The authoritative dirservers stay connected to everybody,
3329 and everybody stays connected to 0.0.7 servers, but otherwise
3330 clients/servers expire unused connections after 5 minutes.
3331 - When servers get a sigint, they delay 30 seconds (refusing new
3332 connections) then exit. A second sigint causes immediate exit.
3333 - File and name management:
3334 - Look for .torrc if no CONFDIR "torrc" is found.
3335 - If no datadir is defined, then choose, make, and secure ~/.tor
3337 - If torrc not found, exitpolicy reject *:*.
3338 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
3339 - If no nickname is defined, derive default from hostname.
3340 - Rename secret key files, e.g. identity.key -> secret_id_key,
3341 to discourage people from mailing their identity key to tor-ops.
3342 - Refuse to build a circuit before the directory has arrived --
3343 it won't work anyway, since you won't know the right onion keys
3345 - Try other dirservers immediately if the one you try is down. This
3346 should tolerate down dirservers better now.
3347 - Parse tor version numbers so we can do an is-newer-than check
3348 rather than an is-in-the-list check.
3349 - New socks command 'resolve', to let us shim gethostbyname()
3351 - A 'tor_resolve' script to access the socks resolve functionality.
3352 - A new socks-extensions.txt doc file to describe our
3353 interpretation and extensions to the socks protocols.
3354 - Add a ContactInfo option, which gets published in descriptor.
3355 - Publish OR uptime in descriptor (and thus in directory) too.
3356 - Write tor version at the top of each log file
3357 - New docs in the tarball:
3359 - Document that you should proxy your SSL traffic too.
3362 Changes in version 0.0.7.2 - 2004-07-07
3363 o A better fix for the 0.0.0.0 problem, that will hopefully
3364 eliminate the remaining related assertion failures.
3367 Changes in version 0.0.7.1 - 2004-07-04
3368 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
3369 since internally we use 0.0.0.0 to signify "not yet resolved".
3372 Changes in version 0.0.7 - 2004-06-07
3373 o Updated the man page to reflect the new features.
3376 Changes in version 0.0.7rc2 - 2004-06-06
3377 o Changes from 0.0.7rc1:
3378 - Make it build on Win32 again.
3379 o Changes from 0.0.6.2:
3380 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
3384 Changes in version 0.0.7rc1 - 2004-06-02
3386 - On sighup, we were adding another log without removing the first
3387 one. So log messages would get duplicated n times for n sighups.
3388 - Several cases of using a connection after we'd freed it. The
3389 problem was that connections that are pending resolve are in both
3390 the pending_resolve tree, and also the circuit's resolving_streams
3391 list. When you want to remove one, you must remove it from both.
3392 - Fix a double-mark-for-close where an end cell arrived for a
3393 resolving stream, and then the resolve failed.
3394 - Check directory signatures based on name of signer, not on whom
3395 we got the directory from. This will let us cache directories more
3398 - Crank up some of our constants to handle more users.
3401 Changes in version 0.0.7pre1 - 2004-06-02
3402 o Fixes for crashes and other obnoxious bugs:
3403 - Fix an epipe bug: sometimes when directory connections failed
3404 to connect, we would give them a chance to flush before closing
3406 - When we detached from a circuit because of resolvefailed, we
3407 would immediately try the same circuit twice more, and then
3408 give up on the resolve thinking we'd tried three different
3410 - Limit the number of intro circuits we'll attempt to build for a
3411 hidden service per 15-minute period.
3412 - Check recommended-software string *early*, before actually parsing
3413 the directory. Thus we can detect an obsolete version and exit,
3414 even if the new directory format doesn't parse.
3415 o Fixes for security bugs:
3416 - Remember which nodes are dirservers when you startup, and if a
3417 random OR enables his dirport, don't automatically assume he's
3418 a trusted dirserver.
3420 - Directory connections were asking the wrong poll socket to
3421 start writing, and not asking themselves to start writing.
3422 - When we detached from a circuit because we sent a begin but
3423 didn't get a connected, we would use it again the first time;
3424 but after that we would correctly switch to a different one.
3425 - Stop warning when the first onion decrypt attempt fails; they
3426 will sometimes legitimately fail now that we rotate keys.
3427 - Override unaligned-access-ok check when $host_cpu is ia64 or
3428 arm. Apparently they allow it but the kernel whines.
3429 - Dirservers try to reconnect periodically too, in case connections
3431 - Fix some memory leaks in directory servers.
3432 - Allow backslash in Win32 filenames.
3433 - Made Tor build complain-free on FreeBSD, hopefully without
3434 breaking other BSD builds. We'll see.
3436 - Doxygen markup on all functions and global variables.
3437 - Make directory functions update routerlist, not replace it. So
3438 now directory disagreements are not so critical a problem.
3439 - Remove the upper limit on number of descriptors in a dirserver's
3440 directory (not that we were anywhere close).
3441 - Allow multiple logfiles at different severity ranges.
3442 - Allow *BindAddress to specify ":port" rather than setting *Port
3443 separately. Allow multiple instances of each BindAddress config
3444 option, so you can bind to multiple interfaces if you want.
3445 - Allow multiple exit policy lines, which are processed in order.
3446 Now we don't need that huge line with all the commas in it.
3447 - Enable accept/reject policies on SOCKS connections, so you can bind
3448 to 0.0.0.0 but still control who can use your OP.
3451 Changes in version 0.0.6.2 - 2004-05-16
3452 o Our integrity-checking digest was checking only the most recent cell,
3453 not the previous cells like we'd thought.
3454 Thanks to Stefan Mark for finding the flaw!
3457 Changes in version 0.0.6.1 - 2004-05-06
3458 o Fix two bugs in our AES counter-mode implementation (this affected
3459 onion-level stream encryption, but not TLS-level). It turns
3460 out we were doing something much more akin to a 16-character
3461 polyalphabetic cipher. Oops.
3462 Thanks to Stefan Mark for finding the flaw!
3463 o Retire moria3 as a directory server, and add tor26 as a directory
3467 Changes in version 0.0.6 - 2004-05-02
3471 Changes in version 0.0.6rc4 - 2004-05-01
3472 o Update the built-in dirservers list to use the new directory format
3473 o Fix a rare seg fault: if a node offering a hidden service attempts
3474 to build a circuit to Alice's rendezvous point and fails before it
3475 reaches the last hop, it retries with a different circuit, but
3477 o Handle windows socket errors correctly.
3480 Changes in version 0.0.6rc3 - 2004-04-28
3481 o Don't expire non-general excess circuits (if we had enough
3482 circuits open, we were expiring rendezvous circuits -- even
3483 when they had a stream attached. oops.)
3484 o Fetch randomness from /dev/urandom better (not via fopen/fread)
3485 o Better debugging for tls errors
3486 o Some versions of openssl have an SSL_pending function that erroneously
3487 returns bytes when there is a non-application record pending.
3488 o Set Content-Type on the directory and hidserv descriptor.
3489 o Remove IVs from cipher code, since AES-ctr has none.
3490 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
3491 o We were using an array of length zero in a few places.
3492 o win32's gethostbyname can't resolve an IP to an IP.
3493 o win32's close can't close a socket.
3496 Changes in version 0.0.6rc2 - 2004-04-26
3497 o Fix a bug where we were closing tls connections intermittently.
3498 It turns out openssl keeps its errors around -- so if an error
3499 happens, and you don't ask about it, and then another openssl
3500 operation happens and succeeds, and you ask if there was an error,
3501 it tells you about the first error. Fun fun.
3502 o Fix a bug that's been lurking since 27 may 03 (!)
3503 When passing back a destroy cell, we would use the wrong circ id.
3504 'Mostly harmless', but still worth fixing.
3505 o Since we don't support truncateds much, don't bother sending them;
3506 just close the circ.
3507 o check for <machine/limits.h> so we build on NetBSD again (I hope).
3508 o don't crash if a conn that sent a begin has suddenly lost its circuit
3509 (this was quite rare).
3512 Changes in version 0.0.6rc1 - 2004-04-25
3513 o We now rotate link (tls context) keys and onion keys.
3514 o CREATE cells now include oaep padding, so you can tell
3515 if you decrypted them correctly.
3516 o Add bandwidthburst to server descriptor.
3517 o Directories now say which dirserver signed them.
3518 o Use a tor_assert macro that logs failed assertions too.
3521 Changes in version 0.0.6pre5 - 2004-04-18
3522 o changes from 0.0.6pre4:
3523 - make tor build on broken freebsd 5.2 installs
3524 - fix a failed assert when you try an intro point, get a nack, and try
3525 a second one and it works.
3526 - when alice uses a port that the hidden service doesn't accept,
3527 it now sends back an end cell (denied by exit policy). otherwise
3528 alice would just have to wait to time out.
3529 - fix another rare bug: when we had tried all the intro
3530 points for a hidden service, we fetched the descriptor
3531 again, but we left our introcirc thinking it had already
3532 sent an intro, so it kept waiting for a response...
3533 - bugfix: when you sleep your hidden-service laptop, as soon
3534 as it wakes up it tries to upload a service descriptor, but
3535 socketpair fails for some reason (localhost not up yet?).
3536 now we simply give up on that upload, and we'll try again later.
3537 i'd still like to find the bug though.
3538 - if an intro circ waiting for an ack dies before getting one, then
3540 - we were reusing stale service descriptors and refetching usable
3544 Changes in version 0.0.6pre4 - 2004-04-14
3545 o changes from 0.0.6pre3:
3546 - when bob fails to connect to the rendezvous point, and his
3547 circ didn't fail because of the rendezvous point itself, then
3548 he retries a couple of times
3549 - we expire introduction and rendezvous circs more thoroughly
3550 (sometimes they were hanging around forever)
3551 - we expire unattached rendezvous streams that have been around
3552 too long (they were sticking around forever).
3553 - fix a measly fencepost error that was crashing everybody with
3557 Changes in version 0.0.6pre3 - 2004-04-14
3558 o changes from 0.0.6pre2:
3559 - make hup work again
3560 - fix some memory leaks for dirservers
3561 - allow more skew in rendezvous descriptor timestamps, to help
3562 handle people like blanu who don't know what time it is
3563 - normal circs are 3 hops, but some rend/intro circs are 4, if
3564 the initiator doesn't get to choose the last hop
3565 - send acks for introductions, so alice can know whether to try
3567 - bob publishes intro points more correctly
3568 o changes from 0.0.5:
3569 - fix an assert trigger that's been plaguing us since the days
3570 of 0.0.2prexx (thanks weasel!)
3571 - retry stream correctly when we fail to connect because of
3572 exit-policy-reject (should try another) or can't-resolve-address
3573 (also should try another, because dns on random internet servers
3575 - when we hup a dirserver and we've *removed* a server from the
3576 approved-routers list, now we remove that server from the
3577 in-memory directories too
3580 Changes in version 0.0.6pre2 - 2004-04-08
3581 o We fixed our base32 implementation. Now it works on all architectures.
3584 Changes in version 0.0.6pre1 - 2004-04-08
3586 - Hidden services and rendezvous points are implemented. Go to
3587 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
3588 hidden services. (This only works via a socks4a proxy such as
3589 Privoxy, and currently it's quite slow.)
3592 Changes in version 0.0.5 - 2004-03-30
3596 Changes in version 0.0.5rc3 - 2004-03-29
3597 o Install torrc as torrc.sample -- we no longer clobber your
3599 o Re-enable recommendedversion checking (we broke it in rc2, oops)
3600 o Add in a 'notice' log level for things the operator should hear
3601 but that aren't warnings
3604 Changes in version 0.0.5rc2 - 2004-03-29
3605 o Hold socks connection open until reply is flushed (if possible)
3606 o Make exit nodes resolve IPs to IPs immediately, rather than asking
3607 the dns farm to do it.
3608 o Fix c99 aliasing warnings in rephist.c
3609 o Don't include server descriptors that are older than 24 hours in the
3611 o Give socks 'reject' replies their whole 15s to attempt to flush,
3612 rather than seeing the 60s timeout and assuming the flush had failed.
3613 o Clean automake droppings from the cvs repository
3616 Changes in version 0.0.5rc1 - 2004-03-28
3617 o Fix mangled-state bug in directory fetching (was causing sigpipes).
3618 o Only build circuits after we've fetched the directory: clients were
3619 using only the directory servers before they'd fetched a directory.
3620 This also means longer startup time; so it goes.
3621 o Fix an assert trigger where an OP would fail to handshake, and we'd
3622 expect it to have a nickname.
3623 o Work around a tsocks bug: do a socks reject when AP connection dies
3624 early, else tsocks goes into an infinite loop.
3627 Changes in version 0.0.4 - 2004-03-26
3628 o When connecting to a dirserver or OR and the network is down,
3632 Changes in version 0.0.3 - 2004-03-26
3633 o Warn and fail if server chose a nickname with illegal characters
3634 o Port to Solaris and Sparc:
3635 - include missing header fcntl.h
3636 - have autoconf find -lsocket -lnsl automatically
3637 - deal with hardware word alignment
3638 - make uname() work (solaris has a different return convention)
3639 - switch from using signal() to sigaction()
3640 o Preliminary work on reputation system:
3641 - Keep statistics on success/fail of connect attempts; they're published
3642 by kill -USR1 currently.
3643 - Add a RunTesting option to try to learn link state by creating test
3644 circuits, even when SocksPort is off.
3645 - Remove unused open circuits when there are too many.
3648 Changes in version 0.0.2 - 2004-03-19
3649 - Include strlcpy and strlcat for safer string ops
3650 - define INADDR_NONE so we compile (but still not run) on solaris
3653 Changes in version 0.0.2pre27 - 2004-03-14
3655 - Allow internal tor networks (we were rejecting internal IPs,
3656 now we allow them if they're set explicitly).
3657 - And fix a few endian issues.
3660 Changes in version 0.0.2pre26 - 2004-03-14
3662 - If a stream times out after 15s without a connected cell, don't
3663 try that circuit again: try a new one.
3664 - Retry streams at most 4 times. Then give up.
3665 - When a dirserver gets a descriptor from an unknown router, it
3666 logs its fingerprint (so the dirserver operator can choose to
3667 accept it even without mail from the server operator).
3668 - Inform unapproved servers when we reject their descriptors.
3669 - Make tor build on Windows again. It works as a client, who knows
3671 - Clearer instructions in the torrc for how to set up a server.
3672 - Be more efficient about reading fd's when our global token bucket
3673 (used for rate limiting) becomes empty.
3675 - Stop asserting that computers always go forward in time. It's
3677 - When we sent a cell (e.g. destroy) and then marked an OR connection
3678 expired, we might close it before finishing a flush if the other
3679 side isn't reading right then.
3680 - Don't allow dirservers to start if they haven't defined
3682 - We were caching transient dns failures. Oops.
3683 - Prevent servers from publishing an internal IP as their address.
3684 - Address a strcat vulnerability in circuit.c
3687 Changes in version 0.0.2pre25 - 2004-03-04
3689 - Put the OR's IP in its router descriptor, not its fqdn. That way
3690 we'll stop being stalled by gethostbyname for nodes with flaky dns,
3693 - If the user typed in an address that didn't resolve, the server
3697 Changes in version 0.0.2pre24 - 2004-03-03
3699 - Fix an assertion failure in dns.c, where we were trying to dequeue
3700 a pending dns resolve even if it wasn't pending
3701 - Fix a spurious socks5 warning about still trying to write after the
3702 connection is finished.
3703 - Hold certain marked_for_close connections open until they're finished
3704 flushing, rather than losing bytes by closing them too early.
3705 - Correctly report the reason for ending a stream
3706 - Remove some duplicate calls to connection_mark_for_close
3707 - Put switch_id and start_daemon earlier in the boot sequence, so it
3708 will actually try to chdir() to options.DataDirectory
3709 - Make 'make test' exit(1) if a test fails; fix some unit tests
3710 - Make tor fail when you use a config option it doesn't know about,
3711 rather than warn and continue.
3712 - Make --version work
3713 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
3716 Changes in version 0.0.2pre23 - 2004-02-29
3718 - Print a statement when the first circ is finished, so the user
3720 - If a relay cell is unrecognized at the end of the circuit,
3721 send back a destroy. (So attacks to mutate cells are more
3723 - New config option 'excludenodes' to avoid certain nodes for circuits.
3724 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
3725 so you can collect coredumps there.
3727 - Fix a bug in tls flushing where sometimes data got wedged and
3728 didn't flush until more data got sent. Hopefully this bug was
3729 a big factor in the random delays we were seeing.
3730 - Make 'connected' cells include the resolved IP, so the client
3731 dns cache actually gets populated.
3732 - Disallow changing from ORPort=0 to ORPort>0 on hup.
3733 - When we time-out on a stream and detach from the circuit, send an
3734 end cell down it first.
3735 - Only warn about an unknown router (in exitnodes, entrynodes,
3736 excludenodes) after we've fetched a directory.
3739 Changes in version 0.0.2pre22 - 2004-02-26
3741 - Servers publish less revealing uname information in descriptors.
3742 - More memory tracking and assertions, to crash more usefully when
3744 - If the default torrc isn't there, just use some default defaults.
3745 Plus provide an internal dirservers file if they don't have one.
3746 - When the user tries to use Tor as an http proxy, give them an http
3747 501 failure explaining that we're a socks proxy.
3748 - Dump a new router.desc on hup, to help confused people who change
3749 their exit policies and then wonder why router.desc doesn't reflect
3751 - Clean up the generic tor.sh init script that we ship with.
3753 - If the exit stream is pending on the resolve, and a destroy arrives,
3754 then the stream wasn't getting removed from the pending list. I
3755 think this was the one causing recent server crashes.
3756 - Use a more robust poll on OSX 10.3, since their poll is flaky.
3757 - When it couldn't resolve any dirservers, it was useless from then on.
3758 Now it reloads the RouterFile (or default dirservers) if it has no
3760 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
3761 many users don't even *have* a /usr/local/sbin/.
3764 Changes in version 0.0.2pre21 - 2004-02-18
3766 - There's a ChangeLog file that actually reflects the changelog.
3767 - There's a 'torify' wrapper script, with an accompanying
3768 tor-tsocks.conf, that simplifies the process of using tsocks for
3769 tor. It even has a man page.
3770 - The tor binary gets installed to sbin rather than bin now.
3771 - Retry streams where the connected cell hasn't arrived in 15 seconds
3772 - Clean up exit policy handling -- get the default out of the torrc,
3773 so we can update it without forcing each server operator to fix
3775 - Allow imaps and pop3s in default exit policy
3777 - Prevent picking middleman nodes as the last node in the circuit
3780 Changes in version 0.0.2pre20 - 2004-01-30
3782 - We now have a deb package, and it's in debian unstable. Go to
3784 - I've split the TotalBandwidth option into BandwidthRate (how many
3785 bytes per second you want to allow, long-term) and
3786 BandwidthBurst (how many bytes you will allow at once before the cap
3787 kicks in). This better token bucket approach lets you, say, set
3788 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
3789 performance while not exceeding your monthly bandwidth quota.
3790 - Push out a tls record's worth of data once you've got it, rather
3791 than waiting until you've read everything waiting to be read. This
3792 may improve performance by pipelining better. We'll see.
3793 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
3794 from failed circuits (if they haven't been connected yet) and attach
3796 - Expire old streams that haven't managed to connect. Some day we'll
3797 have them reattach to new circuits instead.
3800 - Fix several memory leaks that were causing servers to become bloated
3802 - Fix a few very rare assert triggers. A few more remain.
3803 - Setuid to User _before_ complaining about running as root.
3806 Changes in version 0.0.2pre19 - 2004-01-07
3808 - Fix deadlock condition in dns farm. We were telling a child to die by
3809 closing the parent's file descriptor to him. But newer children were
3810 inheriting the open file descriptor from the parent, and since they
3811 weren't closing it, the socket never closed, so the child never read
3812 eof, so he never knew to exit. Similarly, dns workers were holding
3813 open other sockets, leading to all sorts of chaos.
3814 - New cleaner daemon() code for forking and backgrounding.
3815 - If you log to a file, it now prints an entry at the top of the
3816 logfile so you know it's working.
3817 - The onionskin challenge length was 30 bytes longer than necessary.
3818 - Started to patch up the spec so it's not quite so out of date.
3821 Changes in version 0.0.2pre18 - 2004-01-02
3823 - Fix endian issues with the 'integrity' field in the relay header.
3824 - Fix a potential bug where connections in state
3825 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
3828 Changes in version 0.0.2pre17 - 2003-12-30
3830 - Made --debuglogfile (or any second log file, actually) work.
3831 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
3832 adversary could force us into an infinite loop.
3835 - Each onionskin handshake now includes a hash of the computed key,
3836 to prove the server's identity and help perfect forward secrecy.
3837 - Changed cell size from 256 to 512 bytes (working toward compatibility
3839 - Changed cell length to 2 bytes, and moved it to the relay header.
3840 - Implemented end-to-end integrity checking for the payloads of
3842 - Separated streamid from 'recognized' (otherwise circuits will get
3843 messed up when we try to have streams exit from the middle). We
3844 use the integrity-checking to confirm that a cell is addressed to
3846 - Randomize the initial circid and streamid values, so an adversary who
3847 breaks into a node can't learn how many circuits or streams have
3851 Changes in version 0.0.2pre16 - 2003-12-14
3853 - Fixed a bug that made HUP trigger an assert
3854 - Fixed a bug where a circuit that immediately failed wasn't being
3855 counted as a failed circuit in counting retries.
3858 - Now we close the circuit when we get a truncated cell: otherwise we're
3859 open to an anonymity attack where a bad node in the path truncates
3860 the circuit and then we open streams at him.
3861 - Add port ranges to exit policies
3862 - Add a conservative default exit policy
3863 - Warn if you're running tor as root
3864 - on HUP, retry OR connections and close/rebind listeners
3865 - options.EntryNodes: try these nodes first when picking the first node
3866 - options.ExitNodes: if your best choices happen to include any of
3867 your preferred exit nodes, you choose among just those preferred
3869 - options.ExcludedNodes: nodes that are never picked in path building
3872 Changes in version 0.0.2pre15 - 2003-12-03
3873 o Robustness and bugfixes:
3874 - Sometimes clients would cache incorrect DNS resolves, which would
3875 really screw things up.
3876 - An OP that goes offline would slowly leak all its sockets and stop
3878 - A wide variety of bugfixes in exit node selection, exit policy
3879 handling, and processing pending streams when a new circuit is
3881 - Pick nodes for a path only from those the directory says are up
3882 - Choose randomly from all running dirservers, not always the first one
3883 - Increase allowed http header size for directory fetch.
3884 - Stop writing to stderr (if we're daemonized it will be closed).
3885 - Enable -g always, so cores will be more useful to me.
3886 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
3889 - Wrote a man page. It lists commonly used options.
3892 - Change default loglevel to warn.
3893 - Make PidFile default to null rather than littering in your CWD.
3894 - OnionRouter config option is now obsolete. Instead it just checks
3896 - Moved to a single unified torrc file for both clients and servers.
3899 Changes in version 0.0.2pre14 - 2003-11-29
3900 o Robustness and bugfixes:
3901 - Force the admin to make the DataDirectory himself
3902 - to get ownership/permissions right
3903 - so clients no longer make a DataDirectory and then never use it
3904 - fix bug where a client who was offline for 45 minutes would never
3905 pull down a directory again
3906 - fix (or at least hide really well) the dns assert bug that was
3907 causing server crashes
3908 - warnings and improved robustness wrt clockskew for certs
3909 - use the native daemon(3) to daemonize, when available
3910 - exit if bind() fails
3911 - exit if neither socksport nor orport is defined
3912 - include our own tor_timegm (Win32 doesn't have its own)
3913 - bugfix for win32 with lots of connections
3914 - fix minor bias in PRNG
3915 - make dirserver more robust to corrupt cached directory
3918 - Wrote the design document (woo)
3920 o Circuit building and exit policies:
3921 - Circuits no longer try to use nodes that the directory has told them
3923 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
3924 bitcounts (18.0.0.0/8).
3925 - Make AP connections standby for a circuit if no suitable circuit
3926 exists, rather than failing
3927 - Circuits choose exit node based on addr/port, exit policies, and
3928 which AP connections are standing by
3929 - Bump min pathlen from 2 to 3
3930 - Relay end cells have a payload to describe why the stream ended.
3931 - If the stream failed because of exit policy, try again with a new
3933 - Clients have a dns cache to remember resolved addresses.
3934 - Notice more quickly when we have no working circuits
3937 - APPort is now called SocksPort
3938 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
3940 - RecommendedVersions is now a config variable rather than
3941 hardcoded (for dirservers)
3942 - Reloads config on HUP
3943 - Usage info on -h or --help
3944 - If you set User and Group config vars, it'll setu/gid to them.
3946 Changes in version 0.0.2pre13 - 2003-10-19
3947 o General stability:
3948 - SSL_write no longer fails when it returns WANTWRITE and the number
3949 of bytes in the buf has changed by the next SSL_write call.
3950 - Fix segfault fetching directory when network is down
3951 - Fix a variety of minor memory leaks
3952 - Dirservers reload the fingerprints file on HUP, so I don't have
3953 to take down the network when I approve a new router
3954 - Default server config file has explicit Address line to specify fqdn
3957 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
3958 - Make listener connections not ever alloc bufs
3960 o Autoconf improvements:
3961 - don't clobber an external CFLAGS in ./configure
3962 - Make install now works
3963 - create var/lib/tor on make install
3964 - autocreate a tor.sh initscript to help distribs
3965 - autocreate the torrc and sample-server-torrc with correct paths
3967 o Log files and Daemonizing now work:
3968 - If --DebugLogFile is specified, log to it at -l debug
3969 - If --LogFile is specified, use it instead of commandline
3970 - If --RunAsDaemon is set, tor forks and backgrounds on startup