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.
65 - Call stat() slightly less often; use fstat() when possible.
66 - Treat failure to parse resolv.conf as an error.
69 - Weight directory requests by advertised bandwidth. Now we can
70 let servers enable write limiting but still allow most clients to
71 succeed at their directory requests.
74 - Create a new file ReleaseNotes which was the old ChangeLog. The
75 new ChangeLog file now includes the summaries for even development
77 - Check for addresses with invalid characters at the exit as well
78 as at the client, and warn less verbosely when they fail. You can
79 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
80 - Adapt a patch from goodell to let the contrib/exitlist script
81 take arguments rather than require direct editing.
82 - Inform the server operator when we decide not to advertise a
83 DirPort due to AccountingMax enabled or a low BandwidthRate. It
84 was confusing Zax, so now we're hopefully more helpful.
85 - Bring us one step closer to being able to establish an encrypted
86 directory tunnel without knowing a descriptor first. Still not
87 ready yet. As part of the change, now assume we can use a
88 create_fast cell if we don't know anything about a router.
89 - Allow exit nodes to use nameservers running on ports other than 53.
90 - Servers now cache reverse DNS replies.
92 o Minor features (controller):
93 - Track reasons for OR connection failure; make these reasons
94 available via the controller interface. (Patch from Mike Perry.)
95 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
96 can learn when clients are sending malformed hostnames to Tor.
97 - Clean up documentation for controller status events.
100 Changes in version 0.1.2.6-alpha - 2007-01-09
102 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
103 connection handles more than 4 gigs in either direction, we crash.
104 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
105 advertised exit node, somebody might try to exit from us when
106 we're bootstrapping and before we've built your descriptor yet.
107 Refuse the connection rather than crashing.
110 - Warn if we (as a server) find that we've resolved an address that we
111 weren't planning to resolve.
112 - Warn that using select() on any libevent version before 1.1 will be
113 unnecessarily slow (even for select()).
114 - Flush ERR-level controller status events just like we currently
115 flush ERR-level log events, so that a Tor shutdown doesn't prevent
116 the controller from learning about current events.
118 o Minor features (more controller status events):
119 - Implement EXTERNAL_ADDRESS server status event so controllers can
120 learn when our address changes.
121 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
122 can learn when directories reject our descriptor.
123 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
124 can learn when a client application is speaking a non-socks protocol
126 - Implement DANGEROUS_SOCKS client status event so controllers
127 can learn when a client application is leaking DNS addresses.
128 - Implement BUG general status event so controllers can learn when
129 Tor is unhappy about its internal invariants.
130 - Implement CLOCK_SKEW general status event so controllers can learn
131 when Tor thinks the system clock is set incorrectly.
132 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
133 server status events so controllers can learn when their descriptors
134 are accepted by a directory.
135 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
136 server status events so controllers can learn about Tor's progress in
137 deciding whether it's reachable from the outside.
138 - Implement BAD_LIBEVENT general status event so controllers can learn
139 when we have a version/method combination in libevent that needs to
141 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
142 and DNS_USELESS server status events so controllers can learn
143 about changes to DNS server status.
145 o Minor features (directory):
146 - Authorities no longer recommend exits as guards if this would shift
147 too much load to the exit nodes.
150 Changes in version 0.1.2.5-alpha - 2007-01-06
152 - Enable write limiting as well as read limiting. Now we sacrifice
153 capacity if we're pushing out lots of directory traffic, rather
154 than overrunning the user's intended bandwidth limits.
155 - Include TLS overhead when counting bandwidth usage; previously, we
156 would count only the bytes sent over TLS, but not the bytes used
158 - Support running the Tor service with a torrc not in the same
159 directory as tor.exe and default to using the torrc located in
160 the %appdata%\Tor\ of the user who installed the service. Patch
162 - Servers now check for the case when common DNS requests are going to
163 wildcarded addresses (i.e. all getting the same answer), and change
164 their exit policy to reject *:* if it's happening.
165 - Implement BEGIN_DIR cells, so we can connect to the directory
166 server via TLS to do encrypted directory requests rather than
167 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
168 config options if you like.
170 o Minor features (config and docs):
171 - Start using the state file to store bandwidth accounting data:
172 the bw_accounting file is now obsolete. We'll keep generating it
173 for a while for people who are still using 0.1.2.4-alpha.
174 - Try to batch changes to the state file so that we do as few
175 disk writes as possible while still storing important things in
177 - The state file and the bw_accounting file get saved less often when
178 the AvoidDiskWrites config option is set.
179 - Make PIDFile work on Windows (untested).
180 - Add internal descriptions for a bunch of configuration options:
181 accessible via controller interface and in comments in saved
183 - Reject *:563 (NNTPS) in the default exit policy. We already reject
184 NNTP by default, so this seems like a sensible addition.
185 - Clients now reject hostnames with invalid characters. This should
186 avoid some inadvertent info leaks. Add an option
187 AllowNonRFC953Hostnames to disable this behavior, in case somebody
188 is running a private network with hosts called @, !, and #.
189 - Add a maintainer script to tell us which options are missing
190 documentation: "make check-docs".
191 - Add a new address-spec.txt document to describe our special-case
192 addresses: .exit, .onion, and .noconnnect.
194 o Minor features (DNS):
195 - Ongoing work on eventdns infrastructure: now it has dns server
196 and ipv6 support. One day Tor will make use of it.
197 - Add client-side caching for reverse DNS lookups.
198 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
199 - When we change nameservers or IP addresses, reset and re-launch
200 our tests for DNS hijacking.
202 o Minor features (directory):
203 - Authorities now specify server versions in networkstatus. This adds
204 about 2% to the side of compressed networkstatus docs, and allows
205 clients to tell which servers support BEGIN_DIR and which don't.
206 The implementation is forward-compatible with a proposed future
207 protocol version scheme not tied to Tor versions.
208 - DirServer configuration lines now have an orport= option so
209 clients can open encrypted tunnels to the authorities without
210 having downloaded their descriptors yet. Enabled for moria1,
211 moria2, tor26, and lefkada now in the default configuration.
212 - Directory servers are more willing to send a 503 "busy" if they
213 are near their write limit, especially for v1 directory requests.
214 Now they can use their limited bandwidth for actual Tor traffic.
215 - Clients track responses with status 503 from dirservers. After a
216 dirserver has given us a 503, we try not to use it until an hour has
217 gone by, or until we have no dirservers that haven't given us a 503.
218 - When we get a 503 from a directory, and we're not a server, we don't
219 count the failure against the total number of failures allowed
220 for the thing we're trying to download.
221 - Report X-Your-Address-Is correctly from tunneled directory
222 connections; don't report X-Your-Address-Is when it's an internal
223 address; and never believe reported remote addresses when they're
225 - Protect against an unlikely DoS attack on directory servers.
226 - Add a BadDirectory flag to network status docs so that authorities
227 can (eventually) tell clients about caches they believe to be
230 o Minor features (controller):
231 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
232 - Reimplement GETINFO so that info/names stays in sync with the
234 - Implement "GETINFO fingerprint".
235 - Implement "SETEVENTS GUARD" so controllers can get updates on
236 entry guard status as it changes.
238 o Minor features (clean up obsolete pieces):
239 - Remove some options that have been deprecated since at least
240 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
241 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
243 - We no longer look for identity and onion keys in "identity.key" and
244 "onion.key" -- these were replaced by secret_id_key and
245 secret_onion_key in 0.0.8pre1.
246 - We no longer require unrecognized directory entries to be
249 o Major bugfixes (security):
250 - Stop sending the HttpProxyAuthenticator string to directory
251 servers when directory connections are tunnelled through Tor.
252 - Clients no longer store bandwidth history in the state file.
253 - Do not log introduction points for hidden services if SafeLogging
255 - When generating bandwidth history, round down to the nearest
256 1k. When storing accounting data, round up to the nearest 1k.
257 - When we're running as a server, remember when we last rotated onion
258 keys, so that we will rotate keys once they're a week old even if
259 we never stay up for a week ourselves.
261 o Major bugfixes (other):
262 - Fix a longstanding bug in eventdns that prevented the count of
263 timed-out resolves from ever being reset. This bug caused us to
264 give up on a nameserver the third time it timed out, and try it
265 10 seconds later... and to give up on it every time it timed out
267 - Take out the '5 second' timeout from the connection retry
268 schedule. Now the first connect attempt will wait a full 10
269 seconds before switching to a new circuit. Perhaps this will help
270 a lot. Based on observations from Mike Perry.
271 - Fix a bug on the Windows implementation of tor_mmap_file() that
272 would prevent the cached-routers file from ever loading. Reported
276 - Fix an assert failure when a directory authority sets
277 AuthDirRejectUnlisted and then receives a descriptor from an
278 unlisted router. Reported by seeess.
279 - Avoid a double-free when parsing malformed DirServer lines.
280 - Fix a bug when a BSD-style PF socket is first used. Patch from
282 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
283 to resolve an address at a given exit node even when they ask for
285 - Servers no longer ever list themselves in their "family" line,
286 even if configured to do so. This makes it easier to configure
287 family lists conveniently.
288 - When running as a server, don't fall back to 127.0.0.1 when no
289 nameservers are configured in /etc/resolv.conf; instead, make the
290 user fix resolv.conf or specify nameservers explicitly. (Resolves
292 - Stop accepting certain malformed ports in configured exit policies.
293 - Don't re-write the fingerprint file every restart, unless it has
295 - Stop warning when a single nameserver fails: only warn when _all_ of
296 our nameservers have failed. Also, when we only have one nameserver,
297 raise the threshold for deciding that the nameserver is dead.
298 - Directory authorities now only decide that routers are reachable
299 if their identity keys are as expected.
300 - When the user uses bad syntax in the Log config line, stop
301 suggesting other bad syntax as a replacement.
302 - Correctly detect ipv6 DNS capability on OpenBSD.
304 o Minor bugfixes (controller):
305 - Report the circuit number correctly in STREAM CLOSED events. Bug
306 reported by Mike Perry.
307 - Do not report bizarre values for results of accounting GETINFOs
308 when the last second's write or read exceeds the allotted bandwidth.
309 - Report "unrecognized key" rather than an empty string when the
310 controller tries to fetch a networkstatus that doesn't exist.
313 Changes in version 0.1.1.26 - 2006-12-14
315 - Stop sending the HttpProxyAuthenticator string to directory
316 servers when directory connections are tunnelled through Tor.
317 - Clients no longer store bandwidth history in the state file.
318 - Do not log introduction points for hidden services if SafeLogging
322 - Fix an assert failure when a directory authority sets
323 AuthDirRejectUnlisted and then receives a descriptor from an
324 unlisted router (reported by seeess).
327 Changes in version 0.1.2.4-alpha - 2006-12-03
329 - Add support for using natd; this allows FreeBSDs earlier than
330 5.1.2 to have ipfw send connections through Tor without using
331 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
334 - Make all connections to addresses of the form ".noconnect"
335 immediately get closed. This lets application/controller combos
336 successfully test whether they're talking to the same Tor by
337 watching for STREAM events.
338 - Make cross.sh cross-compilation script work even when autogen.sh
339 hasn't been run. (Patch from Michael Mohr.)
340 - Statistics dumped by -USR2 now include a breakdown of public key
341 operations, for profiling.
344 - Fix a major leak when directory authorities parse their
345 approved-routers list, a minor memory leak when we fail to pick
346 an exit node, and a few rare leaks on errors.
347 - Handle TransPort connections even when the server sends data before
348 the client sends data. Previously, the connection would just hang
349 until the client sent data. (Patch from tup based on patch from
351 - Avoid assert failure when our cached-routers file is empty on
355 - Don't log spurious warnings when we see a circuit close reason we
356 don't recognize; it's probably just from a newer version of Tor.
357 - Have directory authorities allow larger amounts of drift in uptime
358 without replacing the server descriptor: previously, a server that
359 restarted every 30 minutes could have 48 "interesting" descriptors
361 - Start linking to the Tor specification and Tor reference manual
362 correctly in the Windows installer.
363 - Add Vidalia to the OS X uninstaller script, so when we uninstall
364 Tor/Privoxy we also uninstall Vidalia.
365 - Resume building on Irix64, and fix a lot of warnings from its
367 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
368 when we're running as a client.
371 Changes in version 0.1.1.25 - 2006-11-04
373 - When a client asks us to resolve (rather than connect to)
374 an address, and we have a cached answer, give them the cached
375 answer. Previously, we would give them no answer at all.
376 - We were building exactly the wrong circuits when we predict
377 hidden service requirements, meaning Tor would have to build all
378 its circuits on demand.
379 - If none of our live entry guards have a high uptime, but we
380 require a guard with a high uptime, try adding a new guard before
381 we give up on the requirement. This patch should make long-lived
382 connections more stable on average.
383 - When testing reachability of our DirPort, don't launch new
384 tests when there's already one in progress -- unreachable
385 servers were stacking up dozens of testing streams.
388 - When the user sends a NEWNYM signal, clear the client-side DNS
389 cache too. Otherwise we continue to act on previous information.
392 - Avoid a memory corruption bug when creating a hash table for
394 - Avoid possibility of controller-triggered crash when misusing
395 certain commands from a v0 controller on platforms that do not
396 handle printf("%s",NULL) gracefully.
397 - Avoid infinite loop on unexpected controller input.
398 - Don't log spurious warnings when we see a circuit close reason we
399 don't recognize; it's probably just from a newer version of Tor.
400 - Add Vidalia to the OS X uninstaller script, so when we uninstall
401 Tor/Privoxy we also uninstall Vidalia.
404 Changes in version 0.1.2.3-alpha - 2006-10-29
406 - Prepare for servers to publish descriptors less often: never
407 discard a descriptor simply for being too old until either it is
408 recommended by no authorities, or until we get a better one for
409 the same router. Make caches consider retaining old recommended
410 routers for even longer.
411 - If most authorities set a BadExit flag for a server, clients
412 don't think of it as a general-purpose exit. Clients only consider
413 authorities that advertise themselves as listing bad exits.
414 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
415 headers for content, so that we can work better in the presence of
416 caching HTTP proxies.
417 - Allow authorities to list nodes as bad exits by fingerprint or by
420 o Minor features, controller:
421 - Add a REASON field to CIRC events; for backward compatibility, this
422 field is sent only to controllers that have enabled the extended
423 event format. Also, add additional reason codes to explain why
424 a given circuit has been destroyed or truncated. (Patches from
426 - Add a REMOTE_REASON field to extended CIRC events to tell the
427 controller about why a remote OR told us to close a circuit.
428 - Stream events also now have REASON and REMOTE_REASON fields,
429 working much like those for circuit events.
430 - There's now a GETINFO ns/... field so that controllers can ask Tor
431 about the current status of a router.
432 - A new event type "NS" to inform a controller when our opinion of
433 a router's status has changed.
434 - Add a GETINFO events/names and GETINFO features/names so controllers
435 can tell which events and features are supported.
436 - A new CLEARDNSCACHE signal to allow controllers to clear the
437 client-side DNS cache without expiring circuits.
440 - When the user sends a NEWNYM signal, clear the client-side DNS
441 cache too. Otherwise we continue to act on previous information.
444 - Avoid sending junk to controllers or segfaulting when a controller
445 uses EVENT_NEW_DESC with verbose nicknames.
446 - Stop triggering asserts if the controller tries to extend hidden
447 service circuits (reported by mwenge).
448 - Avoid infinite loop on unexpected controller input.
449 - When the controller does a "GETINFO network-status", tell it
450 about even those routers whose descriptors are very old, and use
451 long nicknames where appropriate.
452 - Change NT service functions to be loaded on demand. This lets us
453 build with MinGW without breaking Tor for Windows 98 users.
454 - Do DirPort reachability tests less often, since a single test
455 chews through many circuits before giving up.
456 - In the hidden service example in torrc.sample, stop recommending
457 esoteric and discouraged hidden service options.
458 - When stopping an NT service, wait up to 10 sec for it to actually
459 stop. (Patch from Matt Edman; resolves bug 295.)
460 - Fix handling of verbose nicknames with ORCONN controller events:
461 make them show up exactly when requested, rather than exactly when
463 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
464 printing a duplicate "$" in the keys we send (reported by mwenge).
465 - Correctly set maximum connection limit on Cygwin. (This time
467 - Try to detect Windows correctly when cross-compiling.
468 - Detect the size of the routers file correctly even if it is
469 corrupted (on systems without mmap) or not page-aligned (on systems
470 with mmap). This bug was harmless.
471 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
472 to open a stream fails; now we do in more cases. This should
473 make clients able to find a good exit faster in some cases, since
474 unhandleable requests will now get an error rather than timing out.
475 - Resolve two memory leaks when rebuilding the on-disk router cache
476 (reported by fookoowa).
477 - Clean up minor code warnings suggested by the MIPSpro C compiler,
478 and reported by some Centos users.
479 - Controller signals now work on non-Unix platforms that don't define
480 SIGUSR1 and SIGUSR2 the way we expect.
481 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
482 values before failing, and always enables eventdns.
483 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
484 Try to fix this in configure.in by checking for most functions
485 before we check for libevent.
488 Changes in version 0.1.2.2-alpha - 2006-10-07
490 - Make our async eventdns library on-by-default for Tor servers,
491 and plan to deprecate the separate dnsworker threads.
492 - Add server-side support for "reverse" DNS lookups (using PTR
493 records so clients can determine the canonical hostname for a given
494 IPv4 address). Only supported by servers using eventdns; servers
495 now announce in their descriptors whether they support eventdns.
496 - Specify and implement client-side SOCKS5 interface for reverse DNS
497 lookups (see doc/socks-extensions.txt).
498 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
499 connect to directory servers through Tor. Previously, clients needed
500 to find Tor exits to make private connections to directory servers.
501 - Avoid choosing Exit nodes for entry or middle hops when the
502 total bandwidth available from non-Exit nodes is much higher than
503 the total bandwidth available from Exit nodes.
504 - Workaround for name servers (like Earthlink's) that hijack failing
505 DNS requests and replace the no-such-server answer with a "helpful"
506 redirect to an advertising-driven search portal. Also work around
507 DNS hijackers who "helpfully" decline to hijack known-invalid
508 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
509 lets you turn it off.
510 - Send out a burst of long-range padding cells once we've established
511 that we're reachable. Spread them over 4 circuits, so hopefully
512 a few will be fast. This exercises our bandwidth and bootstraps
513 us into the directory more quickly.
515 o New/improved config options:
516 - Add new config option "ResolvConf" to let the server operator
517 choose an alternate resolve.conf file when using eventdns.
518 - Add an "EnforceDistinctSubnets" option to control our "exclude
519 servers on the same /16" behavior. It's still on by default; this
520 is mostly for people who want to operate private test networks with
521 all the machines on the same subnet.
522 - If one of our entry guards is on the ExcludeNodes list, or the
523 directory authorities don't think it's a good guard, treat it as
524 if it were unlisted: stop using it as a guard, and throw it off
525 the guards list if it stays that way for a long time.
526 - Allow directory authorities to be marked separately as authorities
527 for the v1 directory protocol, the v2 directory protocol, and
528 as hidden service directories, to make it easier to retire old
529 authorities. V1 authorities should set "HSAuthoritativeDir 1"
530 to continue being hidden service authorities too.
531 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
533 o Minor features, controller:
534 - Fix CIRC controller events so that controllers can learn the
535 identity digests of non-Named servers used in circuit paths.
536 - Let controllers ask for more useful identifiers for servers. Instead
537 of learning identity digests for un-Named servers and nicknames
538 for Named servers, the new identifiers include digest, nickname,
539 and indication of Named status. Off by default; see control-spec.txt
540 for more information.
541 - Add a "getinfo address" controller command so it can display Tor's
542 best guess to the user.
543 - New controller event to alert the controller when our server
544 descriptor has changed.
545 - Give more meaningful errors on controller authentication failure.
547 o Minor features, other:
548 - When asked to resolve a hostname, don't use non-exit servers unless
549 requested to do so. This allows servers with broken DNS to be
550 useful to the network.
551 - Divide eventdns log messages into warn and info messages.
552 - Reserve the nickname "Unnamed" for routers that can't pick
553 a hostname: any router can call itself Unnamed; directory
554 authorities will never allocate Unnamed to any particular router;
555 clients won't believe that any router is the canonical Unnamed.
556 - Only include function names in log messages for info/debug messages.
557 For notice/warn/err, the content of the message should be clear on
558 its own, and printing the function name only confuses users.
559 - Avoid some false positives during reachability testing: don't try
560 to test via a server that's on the same /24 as us.
561 - If we fail to build a circuit to an intended enclave, and it's
562 not mandatory that we use that enclave, stop wanting it.
563 - When eventdns is enabled, allow multithreaded builds on NetBSD and
564 OpenBSD. (We had previously disabled threads on these platforms
565 because they didn't have working thread-safe resolver functions.)
567 o Major bugfixes, anonymity/security:
568 - If a client asked for a server by name, and there's a named server
569 in our network-status but we don't have its descriptor yet, we
570 could return an unnamed server instead.
571 - Fix NetBSD bug that could allow someone to force uninitialized RAM
572 to be sent to a server's DNS resolver. This only affects NetBSD
573 and other platforms that do not bounds-check tolower().
574 - Reject (most) attempts to use Tor circuits with length one. (If
575 many people start using Tor as a one-hop proxy, exit nodes become
576 a more attractive target for compromise.)
577 - Just because your DirPort is open doesn't mean people should be
578 able to remotely teach you about hidden service descriptors. Now
579 only accept rendezvous posts if you've got HSAuthoritativeDir set.
581 o Major bugfixes, other:
582 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
583 - When a client asks the server to resolve (not connect to)
584 an address, and it has a cached answer, give them the cached answer.
585 Previously, the server would give them no answer at all.
586 - Allow really slow clients to not hang up five minutes into their
587 directory downloads (suggested by Adam J. Richter).
588 - We were building exactly the wrong circuits when we anticipated
589 hidden service requirements, meaning Tor would have to build all
590 its circuits on demand.
591 - Avoid crashing when we mmap a router cache file of size 0.
592 - When testing reachability of our DirPort, don't launch new
593 tests when there's already one in progress -- unreachable
594 servers were stacking up dozens of testing streams.
596 o Minor bugfixes, correctness:
597 - If we're a directory mirror and we ask for "all" network status
598 documents, we would discard status documents from authorities
600 - Avoid a memory corruption bug when creating a hash table for
602 - Avoid controller-triggered crash when misusing certain commands
603 from a v0 controller on platforms that do not handle
604 printf("%s",NULL) gracefully.
605 - Don't crash when a controller sends a third argument to an
606 "extendcircuit" request.
607 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
608 response; fix error code when "getinfo dir/status/" fails.
609 - Avoid crash when telling controller stream-status and a stream
611 - Patch from Adam Langley to fix assert() in eventdns.c.
612 - Fix a debug log message in eventdns to say "X resolved to Y"
613 instead of "X resolved to X".
614 - Make eventdns give strings for DNS errors, not just error numbers.
615 - Track unreachable entry guards correctly: don't conflate
616 'unreachable by us right now' with 'listed as down by the directory
617 authorities'. With the old code, if a guard was unreachable by
618 us but listed as running, it would clog our guard list forever.
619 - Behave correctly in case we ever have a network with more than
620 2GB/s total advertised capacity.
621 - Make TrackExitHosts case-insensitive, and fix the behavior of
622 ".suffix" TrackExitHosts items to avoid matching in the middle of
624 - Finally fix the openssl warnings from newer gccs that believe that
625 ignoring a return value is okay, but casting a return value and
626 then ignoring it is a sign of madness.
627 - Prevent the contrib/exitlist script from printing the same
628 result more than once.
629 - Patch from Steve Hildrey: Generate network status correctly on
630 non-versioning dirservers.
631 - Don't listen to the X-Your-Address-Is hint if you did the lookup
632 via Tor; otherwise you'll think you're the exit node's IP address.
634 o Minor bugfixes, performance:
635 - Two small performance improvements on parsing descriptors.
636 - Major performance improvement on inserting descriptors: change
637 algorithm from O(n^2) to O(n).
638 - Make the common memory allocation path faster on machines where
639 malloc(0) returns a pointer.
640 - Start remembering X-Your-Address-Is directory hints even if you're
641 a client, so you can become a server more smoothly.
642 - Avoid duplicate entries on MyFamily line in server descriptor.
644 o Packaging, features:
645 - Remove architecture from OS X builds. The official builds are
646 now universal binaries.
647 - The Debian package now uses --verify-config when (re)starting,
648 to distinguish configuration errors from other errors.
649 - Update RPMs to require libevent 1.1b.
651 o Packaging, bugfixes:
652 - Patches so Tor builds with MinGW on Windows.
653 - Patches so Tor might run on Cygwin again.
654 - Resume building on non-gcc compilers and ancient gcc. Resume
655 building with the -O0 compile flag. Resume building cleanly on
657 - Run correctly on OS X platforms with case-sensitive filesystems.
658 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
659 - Add autoconf checks so Tor can build on Solaris x86 again.
662 - Documented (and renamed) ServerDNSSearchDomains and
663 ServerDNSResolvConfFile options.
664 - Be clearer that the *ListenAddress directives can be repeated
668 Changes in version 0.1.1.24 - 2006-09-29
670 - Allow really slow clients to not hang up five minutes into their
671 directory downloads (suggested by Adam J. Richter).
672 - Fix major performance regression from 0.1.0.x: instead of checking
673 whether we have enough directory information every time we want to
674 do something, only check when the directory information has changed.
675 This should improve client CPU usage by 25-50%.
676 - Don't crash if, after a server has been running for a while,
677 it can't resolve its hostname.
678 - When a client asks us to resolve (not connect to) an address,
679 and we have a cached answer, give them the cached answer.
680 Previously, we would give them no answer at all.
683 - Allow Tor to start when RunAsDaemon is set but no logs are set.
684 - Don't crash when the controller receives a third argument to an
685 "extendcircuit" request.
686 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
687 response; fix error code when "getinfo dir/status/" fails.
688 - Fix configure.in to not produce broken configure files with
689 more recent versions of autoconf. Thanks to Clint for his auto*
691 - Fix security bug on NetBSD that could allow someone to force
692 uninitialized RAM to be sent to a server's DNS resolver. This
693 only affects NetBSD and other platforms that do not bounds-check
695 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
696 methods: these are known to be buggy.
697 - If we're a directory mirror and we ask for "all" network status
698 documents, we would discard status documents from authorities
702 Changes in version 0.1.2.1-alpha - 2006-08-27
704 - Add "eventdns" async dns library from Adam Langley, tweaked to
705 build on OSX and Windows. Only enabled if you pass the
706 --enable-eventdns argument to configure.
707 - Allow servers with no hostname or IP address to learn their
708 IP address by asking the directory authorities. This code only
709 kicks in when you would normally have exited with a "no address"
710 error. Nothing's authenticated, so use with care.
711 - Rather than waiting a fixed amount of time between retrying
712 application connections, we wait only 5 seconds for the first,
713 10 seconds for the second, and 15 seconds for each retry after
714 that. Hopefully this will improve the expected user experience.
715 - Patch from Tup to add support for transparent AP connections:
716 this basically bundles the functionality of trans-proxy-tor
717 into the Tor mainline. Now hosts with compliant pf/netfilter
718 implementations can redirect TCP connections straight to Tor
719 without diverting through SOCKS. Needs docs.
720 - Busy directory servers save lots of memory by spooling server
721 descriptors, v1 directories, and v2 networkstatus docs to buffers
722 as needed rather than en masse. Also mmap the cached-routers
723 files, so we don't need to keep the whole thing in memory too.
724 - Automatically avoid picking more than one node from the same
725 /16 network when constructing a circuit.
726 - Revise and clean up the torrc.sample that we ship with; add
727 a section for BandwidthRate and BandwidthBurst.
730 - Split circuit_t into origin_circuit_t and or_circuit_t, and
731 split connection_t into edge, or, dir, control, and base structs.
732 These will save quite a bit of memory on busy servers, and they'll
733 also help us track down bugs in the code and bugs in the spec.
734 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
735 or later. Log when we are doing this, so we can diagnose it when
736 it fails. (Also, recommend libevent 1.1b for kqueue and
737 win32 methods; deprecate libevent 1.0b harder; make libevent
738 recommendation system saner.)
739 - Start being able to build universal binaries on OS X (thanks
741 - Export the default exit policy via the control port, so controllers
742 don't need to guess what it is / will be later.
743 - Add a man page entry for ProtocolWarnings.
744 - Add TestVia config option to the man page.
745 - Remove even more protocol-related warnings from Tor server logs,
746 such as bad TLS handshakes and malformed begin cells.
747 - Stop fetching descriptors if you're not a dir mirror and you
748 haven't tried to establish any circuits lately. [This currently
749 causes some dangerous behavior, because when you start up again
750 you'll use your ancient server descriptors.]
751 - New DirPort behavior: if you have your dirport set, you download
752 descriptors aggressively like a directory mirror, whether or not
754 - Get rid of the router_retry_connections notion. Now routers
755 no longer try to rebuild long-term connections to directory
756 authorities, and directory authorities no longer try to rebuild
757 long-term connections to all servers. We still don't hang up
758 connections in these two cases though -- we need to look at it
759 more carefully to avoid flapping, and we likely need to wait til
761 - Drop compatibility with obsolete Tors that permit create cells
762 to have the wrong circ_id_type.
763 - Re-enable per-connection rate limiting. Get rid of the "OP
764 bandwidth" concept. Lay groundwork for "bandwidth classes" --
765 separate global buckets that apply depending on what sort of conn
767 - Start publishing one minute or so after we find our ORPort
768 to be reachable. This will help reduce the number of descriptors
769 we have for ourselves floating around, since it's quite likely
770 other things (e.g. DirPort) will change during that minute too.
771 - Fork the v1 directory protocol into its own spec document,
772 and mark dir-spec.txt as the currently correct (v2) spec.
775 - When we find our DirPort to be reachable, publish a new descriptor
776 so we'll tell the world (reported by pnx).
777 - Publish a new descriptor after we hup/reload. This is important
778 if our config has changed such that we'll want to start advertising
779 our DirPort now, etc.
780 - Allow Tor to start when RunAsDaemon is set but no logs are set.
781 - When we have a state file we cannot parse, tell the user and
782 move it aside. Now we avoid situations where the user starts
783 Tor in 1904, Tor writes a state file with that timestamp in it,
784 the user fixes her clock, and Tor refuses to start.
785 - Fix configure.in to not produce broken configure files with
786 more recent versions of autoconf. Thanks to Clint for his auto*
788 - "tor --verify-config" now exits with -1(255) or 0 depending on
789 whether the config options are bad or good.
790 - Resolve bug 321 when using dnsworkers: append a period to every
791 address we resolve at the exit node, so that we do not accidentally
792 pick up local addresses, and so that failing searches are retried
793 in the resolver search domains. (This is already solved for
794 eventdns.) (This breaks Blossom servers for now.)
795 - If we are using an exit enclave and we can't connect, e.g. because
796 its webserver is misconfigured to not listen on localhost, then
797 back off and try connecting from somewhere else before we fail.
800 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
801 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
802 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
803 when the IP address is mapped through MapAddress to a hostname.
804 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
805 useless IPv6 DNS resolves.
806 - Patch suggested by Karsten Loesing: respond to SIGNAL command
807 before we execute the signal, in case the signal shuts us down.
808 - Clean up AllowInvalidNodes man page entry.
809 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
810 - Add more asserts to track down an assert error on a windows Tor
811 server with connection_add being called with socket == -1.
812 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
813 - Fix misleading log messages: an entry guard that is "unlisted",
814 as well as not known to be "down" (because we've never heard
815 of it), is not therefore "up".
816 - Remove code to special-case "-cvs" ending, since it has not
817 actually mattered since 0.0.9.
818 - Make our socks5 handling more robust to broken socks clients:
819 throw out everything waiting on the buffer in between socks
820 handshake phases, since they can't possibly (so the theory
821 goes) have predicted what we plan to respond to them.
824 Changes in version 0.1.1.23 - 2006-07-30
826 - Fast Tor servers, especially exit nodes, were triggering asserts
827 due to a bug in handling the list of pending DNS resolves. Some
828 bugs still remain here; we're hunting them.
829 - Entry guards could crash clients by sending unexpected input.
830 - More fixes on reachability testing: if you find yourself reachable,
831 then don't ever make any client requests (so you stop predicting
832 circuits), then hup or have your clock jump, then later your IP
833 changes, you won't think circuits are working, so you won't try to
834 test reachability, so you won't publish.
837 - Avoid a crash if the controller does a resetconf firewallports
838 and then a setconf fascistfirewall=1.
839 - Avoid an integer underflow when the dir authority decides whether
840 a router is stable: we might wrongly label it stable, and compute
841 a slightly wrong median stability, when a descriptor is published
843 - Fix a place where we might trigger an assert if we can't build our
844 own server descriptor yet.
847 Changes in version 0.1.1.22 - 2006-07-05
849 - Fix a big bug that was causing servers to not find themselves
850 reachable if they changed IP addresses. Since only 0.1.1.22+
851 servers can do reachability testing correctly, now we automatically
852 make sure to test via one of these.
853 - Fix to allow clients and mirrors to learn directory info from
854 descriptor downloads that get cut off partway through.
855 - Directory authorities had a bug in deciding if a newly published
856 descriptor was novel enough to make everybody want a copy -- a few
857 servers seem to be publishing new descriptors many times a minute.
859 - Fix a rare bug that was causing some servers to complain about
860 "closing wedged cpuworkers" and skip some circuit create requests.
861 - Make the Exit flag in directory status documents actually work.
864 Changes in version 0.1.1.21 - 2006-06-10
865 o Crash and assert fixes from 0.1.1.20:
866 - Fix a rare crash on Tor servers that have enabled hibernation.
867 - Fix a seg fault on startup for Tor networks that use only one
869 - Fix an assert from a race condition that occurs on Tor servers
870 while exiting, where various threads are trying to log that they're
871 exiting, and delete the logs, at the same time.
872 - Make our unit tests pass again on certain obscure platforms.
875 - Add support for building SUSE RPM packages.
876 - Speed up initial bootstrapping for clients: if we are making our
877 first ever connection to any entry guard, then don't mark it down
879 - When only one Tor server in the network is labelled as a guard,
880 and we've already picked him, we would cycle endlessly picking him
881 again, being unhappy about it, etc. Now we specifically exclude
882 current guards when picking a new guard.
883 - Servers send create cells more reliably after the TLS connection
884 is established: we were sometimes forgetting to send half of them
885 when we had more than one pending.
886 - If we get a create cell that asks us to extend somewhere, but the
887 Tor server there doesn't match the expected digest, we now send
888 a destroy cell back, rather than silently doing nothing.
889 - Make options->RedirectExit work again.
890 - Make cookie authentication for the controller work again.
891 - Stop being picky about unusual characters in the arguments to
892 mapaddress. It's none of our business.
893 - Add a new config option "TestVia" that lets you specify preferred
894 middle hops to use for test circuits. Perhaps this will let me
895 debug the reachability problems better.
897 o Log / documentation fixes:
898 - If we're a server and some peer has a broken TLS certificate, don't
899 log about it unless ProtocolWarnings is set, i.e., we want to hear
900 about protocol violations by others.
901 - Fix spelling of VirtualAddrNetwork in man page.
902 - Add a better explanation at the top of the autogenerated torrc file
903 about what happened to our old torrc.
906 Changes in version 0.1.1.20 - 2006-05-23
908 - Downgrade a log severity where servers complain that they're
910 - Avoid a compile warning on FreeBSD.
911 - Remove string size limit on NEWDESC messages; solve bug 291.
912 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
913 more thoroughly when we're running on windows.
916 Changes in version 0.1.1.19-rc - 2006-05-03
918 - Regenerate our local descriptor if it's dirty and we try to use
919 it locally (e.g. if it changes during reachability detection).
920 - If we setconf our ORPort to 0, we continued to listen on the
921 old ORPort and receive connections.
922 - Avoid a second warning about machine/limits.h on Debian
924 - Be willing to add our own routerinfo into the routerlist.
925 Now authorities will include themselves in their directories
926 and network-statuses.
927 - Stop trying to upload rendezvous descriptors to every
928 directory authority: only try the v1 authorities.
929 - Servers no longer complain when they think they're not
930 registered with the directory authorities. There were too many
932 - Backport dist-rpm changes so rpms can be built without errors.
935 - Implement an option, VirtualAddrMask, to set which addresses
936 get handed out in response to mapaddress requests. This works
937 around a bug in tsocks where 127.0.0.0/8 is never socksified.
940 Changes in version 0.1.1.18-rc - 2006-04-10
942 - Work harder to download live network-statuses from all the
943 directory authorities we know about. Improve the threshold
944 decision logic so we're more robust to edge cases.
945 - When fetching rendezvous descriptors, we were willing to ask
946 v2 authorities too, which would always return 404.
949 - Stop listing down or invalid nodes in the v1 directory. This will
950 reduce its bulk by about 1/3, and reduce load on directory
952 - When deciding whether a router is Fast or Guard-worthy, consider
953 his advertised BandwidthRate and not just the BandwidthCapacity.
954 - No longer ship INSTALL and README files -- they are useless now.
955 - Force rpmbuild to behave and honor target_cpu.
956 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
957 - Start to include translated versions of the tor-doc-*.html
958 files, along with the screenshots. Still needs more work.
959 - Start sending back 512 and 451 errors if mapaddress fails,
960 rather than not sending anything back at all.
961 - When we fail to bind or listen on an incoming or outgoing
962 socket, we should close it before failing. otherwise we just
963 leak it. (thanks to weasel for finding.)
964 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
965 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
966 - Make NoPublish (even though deprecated) work again.
967 - Fix a minor security flaw where a versioning auth dirserver
968 could list a recommended version many times in a row to make
969 clients more convinced that it's recommended.
970 - Fix crash bug if there are two unregistered servers running
971 with the same nickname, one of them is down, and you ask for
972 them by nickname in your EntryNodes or ExitNodes. Also, try
973 to pick the one that's running rather than an arbitrary one.
974 - Fix an infinite loop we could hit if we go offline for too long.
975 - Complain when we hit WSAENOBUFS on recv() or write() too.
976 Perhaps this will help us hunt the bug.
977 - If you're not a versioning dirserver, don't put the string
978 "client-versions \nserver-versions \n" in your network-status.
979 - Lower the minimum required number of file descriptors to 1000,
980 so we can have some overhead for Valgrind on Linux, where the
981 default ulimit -n is 1024.
984 - Add tor.dizum.com as the fifth authoritative directory server.
985 - Add a new config option FetchUselessDescriptors, off by default,
986 for when you plan to run "exitlist" on your client and you want
987 to know about even the non-running descriptors.
990 Changes in version 0.1.1.17-rc - 2006-03-28
992 - Clients and servers since 0.1.1.10-alpha have been expiring
993 connections whenever they are idle for 5 minutes and they *do*
994 have circuits on them. Oops. With this new version, clients will
995 discard their previous entry guard choices and avoid choosing
996 entry guards running these flawed versions.
997 - Fix memory leak when uncompressing concatenated zlib streams. This
998 was causing substantial leaks over time on Tor servers.
999 - The v1 directory was including servers as much as 48 hours old,
1000 because that's how the new routerlist->routers works. Now only
1001 include them if they're 20 hours old or less.
1004 - Resume building on irix64, netbsd 2.0, etc.
1005 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
1007 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
1008 and it is confusing some users.
1009 - Mirrors stop caching the v1 directory so often.
1010 - Make the max number of old descriptors that a cache will hold
1011 rise with the number of directory authorities, so we can scale.
1012 - Change our win32 uname() hack to be more forgiving about what
1013 win32 versions it thinks it's found.
1016 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
1018 - When the controller's *setconf commands fail, collect an error
1019 message in a string and hand it back to the controller.
1020 - Make the v2 dir's "Fast" flag based on relative capacity, just
1021 like "Stable" is based on median uptime. Name everything in the
1022 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
1023 - Log server fingerprint on startup, so new server operators don't
1024 have to go hunting around their filesystem for it.
1025 - Return a robots.txt on our dirport to discourage google indexing.
1026 - Let the controller ask for GETINFO dir/status/foo so it can ask
1027 directly rather than connecting to the dir port. Only works when
1028 dirport is set for now.
1030 o New config options rather than constants in the code:
1031 - SocksTimeout: How long do we let a socks connection wait
1032 unattached before we fail it?
1033 - CircuitBuildTimeout: Cull non-open circuits that were born
1034 at least this many seconds ago.
1035 - CircuitIdleTimeout: Cull open clean circuits that were born
1036 at least this many seconds ago.
1039 Changes in version 0.1.1.16-rc - 2006-03-18
1040 o Bugfixes on 0.1.1.15-rc:
1041 - Fix assert when the controller asks to attachstream a connect-wait
1042 or resolve-wait stream.
1043 - Now do address rewriting when the controller asks us to attach
1044 to a particular circuit too. This will let Blossom specify
1045 "moria2.exit" without having to learn what moria2's IP address is.
1046 - Make the "tor --verify-config" command-line work again, so people
1047 can automatically check if their torrc will parse.
1048 - Authoritative dirservers no longer require an open connection from
1049 a server to consider him "reachable". We need this change because
1050 when we add new auth dirservers, old servers won't know not to
1052 - Let Tor build on Sun CC again.
1053 - Fix an off-by-one buffer size in dirserv.c that magically never
1054 hit our three authorities but broke sjmurdoch's own tor network.
1055 - If we as a directory mirror don't know of any v1 directory
1056 authorities, then don't try to cache any v1 directories.
1057 - Stop warning about unknown servers in our family when they are
1058 given as hex digests.
1059 - Stop complaining as quickly to the server operator that he
1060 hasn't registered his nickname/key binding.
1061 - Various cleanups so we can add new V2 Auth Dirservers.
1062 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1063 reflect the updated flags in our v2 dir protocol.
1064 - Resume allowing non-printable characters for exit streams (both
1065 for connecting and for resolving). Now we tolerate applications
1066 that don't follow the RFCs. But continue to block malformed names
1069 o Bugfixes on 0.1.0.x:
1070 - Fix assert bug in close_logs(): when we close and delete logs,
1071 remove them all from the global "logfiles" list.
1072 - Fix minor integer overflow in calculating when we expect to use up
1073 our bandwidth allocation before hibernating.
1074 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
1075 there are multiple SSLs installed with different versions.
1076 - When we try to be a server and Address is not explicitly set and
1077 our hostname resolves to a private IP address, try to use an
1078 interface address if it has a public address. Now Windows machines
1079 that think of themselves as localhost can work by default.
1082 - Let the controller ask for GETINFO dir/server/foo so it can ask
1083 directly rather than connecting to the dir port.
1084 - Let the controller tell us about certain router descriptors
1085 that it doesn't want Tor to use in circuits. Implement
1086 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
1087 - New config option SafeSocks to reject all application connections
1088 using unsafe socks protocols. Defaults to off.
1091 Changes in version 0.1.1.15-rc - 2006-03-11
1092 o Bugfixes and cleanups:
1093 - When we're printing strings from the network, don't try to print
1094 non-printable characters. This protects us against shell escape
1095 sequence exploits, and also against attacks to fool humans into
1096 misreading their logs.
1097 - Fix a bug where Tor would fail to establish any connections if you
1098 left it off for 24 hours and then started it: we were happy with
1099 the obsolete network statuses, but they all referred to router
1100 descriptors that were too old to fetch, so we ended up with no
1101 valid router descriptors.
1102 - Fix a seg fault in the controller's "getinfo orconn-status"
1103 command while listing status on incoming handshaking connections.
1104 Introduce a status name "NEW" for these connections.
1105 - If we get a linelist or linelist_s config option from the torrc
1106 (e.g. ExitPolicy) and it has no value, warn and skip rather than
1107 silently resetting it to its default.
1108 - Don't abandon entry guards until they've been down or gone for
1110 - Cleaner and quieter log messages.
1113 - New controller signal NEWNYM that makes new application requests
1115 - Add a new circuit purpose 'controller' to let the controller ask
1116 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
1117 controller command to let you specify the purpose if you're
1118 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
1119 command to let you change a circuit's purpose after it's been
1121 - Accept "private:*" in routerdesc exit policies; not generated yet
1122 because older Tors do not understand it.
1123 - Add BSD-style contributed startup script "rc.subr" from Peter
1127 Changes in version 0.1.1.14-alpha - 2006-02-20
1128 o Bugfixes on 0.1.1.x:
1129 - Don't die if we ask for a stdout or stderr log (even implicitly)
1130 and we're set to RunAsDaemon -- just warn.
1131 - We still had a few bugs in the OR connection rotation code that
1132 caused directory servers to slowly aggregate connections to other
1133 fast Tor servers. This time for sure!
1134 - Make log entries on Win32 include the name of the function again.
1135 - We were treating a pair of exit policies if they were equal even
1136 if one said accept and the other said reject -- causing us to
1137 not always publish a new descriptor since we thought nothing
1139 - Retry pending server downloads as well as pending networkstatus
1140 downloads when we unexpectedly get a socks request.
1141 - We were ignoring the IS_FAST flag in the directory status,
1142 meaning we were willing to pick trivial-bandwidth nodes for "fast"
1144 - If the controller's SAVECONF command fails (e.g. due to file
1145 permissions), let the controller know that it failed.
1148 - If we're trying to be a Tor server and running Windows 95/98/ME
1149 as a server, explain that we'll likely crash.
1150 - When we're a server, a client asks for an old-style directory,
1151 and our write bucket is empty, don't give it to him. This way
1152 small servers can continue to serve the directory *sometimes*,
1153 without getting overloaded.
1154 - Compress exit policies even more -- look for duplicate lines
1156 - Clients now honor the "guard" flag in the router status when
1157 picking entry guards, rather than looking at is_fast or is_stable.
1158 - Retain unrecognized lines in $DATADIR/state file, so that we can
1159 be forward-compatible.
1160 - Generate 18.0.0.0/8 address policy format in descs when we can;
1161 warn when the mask is not reducible to a bit-prefix.
1162 - Let the user set ControlListenAddress in the torrc. This can be
1163 dangerous, but there are some cases (like a secured LAN) where it
1165 - Split ReachableAddresses into ReachableDirAddresses and
1166 ReachableORAddresses, so we can restrict Dir conns to port 80
1167 and OR conns to port 443.
1168 - Now we can target arch and OS in rpm builds (contributed by
1169 Phobos). Also make the resulting dist-rpm filename match the
1171 - New config options to help controllers: FetchServerDescriptors
1172 and FetchHidServDescriptors for whether to fetch server
1173 info and hidserv info or let the controller do it, and
1174 PublishServerDescriptor and PublishHidServDescriptors.
1175 - Also let the controller set the __AllDirActionsPrivate config
1176 option if you want all directory fetches/publishes to happen via
1177 Tor (it assumes your controller bootstraps your circuits).
1180 Changes in version 0.1.0.17 - 2006-02-17
1181 o Crash bugfixes on 0.1.0.x:
1182 - When servers with a non-zero DirPort came out of hibernation,
1183 sometimes they would trigger an assert.
1185 o Other important bugfixes:
1186 - On platforms that don't have getrlimit (like Windows), we were
1187 artificially constraining ourselves to a max of 1024
1188 connections. Now just assume that we can handle as many as 15000
1189 connections. Hopefully this won't cause other problems.
1191 o Backported features:
1192 - When we're a server, a client asks for an old-style directory,
1193 and our write bucket is empty, don't give it to him. This way
1194 small servers can continue to serve the directory *sometimes*,
1195 without getting overloaded.
1196 - Whenever you get a 503 in response to a directory fetch, try
1197 once more. This will become important once servers start sending
1198 503's whenever they feel busy.
1199 - Fetch a new directory every 120 minutes, not every 40 minutes.
1200 Now that we have hundreds of thousands of users running the old
1201 directory algorithm, it's starting to hurt a lot.
1202 - Bump up the period for forcing a hidden service descriptor upload
1203 from 20 minutes to 1 hour.
1206 Changes in version 0.1.1.13-alpha - 2006-02-09
1207 o Crashes in 0.1.1.x:
1208 - When you tried to setconf ORPort via the controller, Tor would
1209 crash. So people using TorCP to become a server were sad.
1210 - Solve (I hope) the stack-smashing bug that we were seeing on fast
1211 servers. The problem appears to be something do with OpenSSL's
1212 random number generation, or how we call it, or something. Let me
1213 know if the crashes continue.
1214 - Turn crypto hardware acceleration off by default, until we find
1215 somebody smart who can test it for us. (It appears to produce
1216 seg faults in at least some cases.)
1217 - Fix a rare assert error when we've tried all intro points for
1218 a hidden service and we try fetching the service descriptor again:
1219 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
1222 - Fix a major load balance bug: we were round-robining in 16 KB
1223 chunks, and servers with bandwidthrate of 20 KB, while downloading
1224 a 600 KB directory, would starve their other connections. Now we
1225 try to be a bit more fair.
1226 - Dir authorities and mirrors were never expiring the newest
1227 descriptor for each server, causing memory and directory bloat.
1228 - Fix memory-bloating and connection-bloating bug on servers: We
1229 were never closing any connection that had ever had a circuit on
1230 it, because we were checking conn->n_circuits == 0, yet we had a
1231 bug that let it go negative.
1232 - Make Tor work using squid as your http proxy again -- squid
1233 returns an error if you ask for a URL that's too long, and it uses
1234 a really generic error message. Plus, many people are behind a
1235 transparent squid so they don't even realize it.
1236 - On platforms that don't have getrlimit (like Windows), we were
1237 artificially constraining ourselves to a max of 1024
1238 connections. Now just assume that we can handle as many as 15000
1239 connections. Hopefully this won't cause other problems.
1240 - Add a new config option ExitPolicyRejectPrivate which defaults to
1241 1. This means all exit policies will begin with rejecting private
1242 addresses, unless the server operator explicitly turns it off.
1245 - Clients not longer download descriptors for non-running
1247 - Before we add new directory authorities, we should make it
1248 clear that only v1 authorities should receive/publish hidden
1249 service descriptors.
1252 - As soon as we've fetched some more directory info, immediately
1253 try to download more server descriptors. This way we don't have
1254 a 10 second pause during initial bootstrapping.
1255 - Remove even more loud log messages that the server operator can't
1257 - When we're running an obsolete or un-recommended version, make
1258 the log message more clear about what the problem is and what
1259 versions *are* still recommended.
1260 - Provide a more useful warn message when our onion queue gets full:
1261 the CPU is too slow or the exit policy is too liberal.
1262 - Don't warn when we receive a 503 from a dirserver/cache -- this
1263 will pave the way for them being able to refuse if they're busy.
1264 - When we fail to bind a listener, try to provide a more useful
1265 log message: e.g., "Is Tor already running?"
1266 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
1267 Goldberg can prove things about our handshake protocol more
1269 - MaxConn has been obsolete for a while now. Document the ConnLimit
1270 config option, which is a *minimum* number of file descriptors
1271 that must be available else Tor refuses to start.
1272 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
1273 if you log to syslog and want something other than LOG_DAEMON.
1274 - Make dirservers generate a separate "guard" flag to mean,
1275 "would make a good entry guard". Make clients parse it and vote
1276 on it. Not used by clients yet.
1277 - Implement --with-libevent-dir option to ./configure. Also, improve
1278 search techniques to find libevent, and use those for openssl too.
1279 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
1280 - Only start testing reachability once we've established a
1281 circuit. This will make startup on dirservers less noisy.
1282 - Don't try to upload hidden service descriptors until we have
1283 established a circuit.
1284 - Fix the controller's "attachstream 0" command to treat conn like
1285 it just connected, doing address remapping, handling .exit and
1286 .onion idioms, and so on. Now we're more uniform in making sure
1287 that the controller hears about new and closing connections.
1290 Changes in version 0.1.1.12-alpha - 2006-01-11
1291 o Bugfixes on 0.1.1.x:
1292 - The fix to close duplicate server connections was closing all
1293 Tor client connections if they didn't establish a circuit
1294 quickly enough. Oops.
1295 - Fix minor memory issue (double-free) that happened on exit.
1297 o Bugfixes on 0.1.0.x:
1298 - Tor didn't warn when it failed to open a log file.
1301 Changes in version 0.1.1.11-alpha - 2006-01-10
1302 o Crashes in 0.1.1.x:
1303 - Include all the assert/crash fixes from 0.1.0.16.
1304 - If you start Tor and then quit very quickly, there were some
1305 races that tried to free things that weren't allocated yet.
1306 - Fix a rare memory stomp if you're running hidden services.
1307 - Fix segfault when specifying DirServer in config without nickname.
1308 - Fix a seg fault when you finish connecting to a server but at
1309 that moment you dump his server descriptor.
1310 - Extendcircuit and Attachstream controller commands would
1311 assert/crash if you don't give them enough arguments.
1312 - Fix an assert error when we're out of space in the connection_list
1313 and we try to post a hidden service descriptor (reported by weasel).
1314 - If you specify a relative torrc path and you set RunAsDaemon in
1315 your torrc, then it chdir()'s to the new directory. If you HUP,
1316 it tries to load the new torrc location, fails, and exits.
1317 The fix: no longer allow a relative path to torrc using -f.
1320 - Implement "entry guards": automatically choose a handful of entry
1321 nodes and stick with them for all circuits. Only pick new guards
1322 when the ones you have are unsuitable, and if the old guards
1323 become suitable again, switch back. This will increase security
1324 dramatically against certain end-point attacks. The EntryNodes
1325 config option now provides some hints about which entry guards you
1326 want to use most; and StrictEntryNodes means to only use those.
1327 - New directory logic: download by descriptor digest, not by
1328 fingerprint. Caches try to download all listed digests from
1329 authorities; clients try to download "best" digests from caches.
1330 This avoids partitioning and isolating attacks better.
1331 - Make the "stable" router flag in network-status be the median of
1332 the uptimes of running valid servers, and make clients pay
1333 attention to the network-status flags. Thus the cutoff adapts
1334 to the stability of the network as a whole, making IRC, IM, etc
1335 connections more reliable.
1338 - Tor servers with dynamic IP addresses were needing to wait 18
1339 hours before they could start doing reachability testing using
1340 the new IP address and ports. This is because they were using
1341 the internal descriptor to learn what to test, yet they were only
1342 rebuilding the descriptor once they decided they were reachable.
1343 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
1344 to download certain server descriptors, throw them away, and then
1345 fetch them again after 30 minutes. Now mirrors throw away these
1346 server descriptors so clients can't get them.
1347 - We were leaving duplicate connections to other ORs open for a week,
1348 rather than closing them once we detect a duplicate. This only
1349 really affected authdirservers, but it affected them a lot.
1350 - Spread the authdirservers' reachability testing over the entire
1351 testing interval, so we don't try to do 500 TLS's at once every
1355 - If the network is down, and we try to connect to a conn because
1356 we have a circuit in mind, and we timeout (30 seconds) because the
1357 network never answers, we were expiring the circuit, but we weren't
1358 obsoleting the connection or telling the entry_guards functions.
1359 - Some Tor servers process billions of cells per day. These statistics
1360 need to be uint64_t's.
1361 - Check for integer overflows in more places, when adding elements
1362 to smartlists. This could possibly prevent a buffer overflow
1363 on malicious huge inputs. I don't see any, but I haven't looked
1365 - ReachableAddresses kept growing new "reject *:*" lines on every
1367 - When you "setconf log" via the controller, it should remove all
1368 logs. We were automatically adding back in a "log notice stdout".
1369 - Newly bootstrapped Tor networks couldn't establish hidden service
1370 circuits until they had nodes with high uptime. Be more tolerant.
1371 - We were marking servers down when they could not answer every piece
1372 of the directory request we sent them. This was far too harsh.
1373 - Fix the torify (tsocks) config file to not use Tor for localhost
1375 - Directory authorities now go to the proper authority when asking for
1376 a networkstatus, even when they want a compressed one.
1377 - Fix a harmless bug that was causing Tor servers to log
1378 "Got an end because of misc error, but we're not an AP. Closing."
1379 - Authorities were treating their own descriptor changes as cosmetic,
1380 meaning the descriptor available in the network-status and the
1381 descriptor that clients downloaded were different.
1382 - The OS X installer was adding a symlink for tor_resolve but
1383 the binary was called tor-resolve (reported by Thomas Hardly).
1384 - Workaround a problem with some http proxies where they refuse GET
1385 requests that specify "Content-Length: 0" (reported by Adrian).
1386 - Fix wrong log message when you add a "HiddenServiceNodes" config
1387 line without any HiddenServiceDir line (reported by Chris Thomas).
1390 - Write the TorVersion into the state file so we have a prayer of
1391 keeping forward and backward compatibility.
1392 - Revive the FascistFirewall config option rather than eliminating it:
1393 now it's a synonym for ReachableAddresses *:80,*:443.
1394 - Clients choose directory servers from the network status lists,
1395 not from their internal list of router descriptors. Now they can
1396 go to caches directly rather than needing to go to authorities
1398 - Directory authorities ignore router descriptors that have only
1399 cosmetic differences: do this for 0.1.0.x servers now too.
1400 - Add a new flag to network-status indicating whether the server
1401 can answer v2 directory requests too.
1402 - Authdirs now stop whining so loudly about bad descriptors that
1403 they fetch from other dirservers. So when there's a log complaint,
1404 it's for sure from a freshly uploaded descriptor.
1405 - Reduce memory requirements in our structs by changing the order
1407 - There used to be two ways to specify your listening ports in a
1408 server descriptor: on the "router" line and with a separate "ports"
1409 line. Remove support for the "ports" line.
1410 - New config option "AuthDirRejectUnlisted" for auth dirservers as
1411 a panic button: if we get flooded with unusable servers we can
1412 revert to only listing servers in the approved-routers file.
1413 - Auth dir servers can now mark a fingerprint as "!reject" or
1414 "!invalid" in the approved-routers file (as its nickname), to
1415 refuse descriptors outright or include them but marked as invalid.
1416 - Servers store bandwidth history across restarts/crashes.
1417 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1418 get a better idea of why their circuits failed. Not used yet.
1419 - Directory mirrors now cache up to 16 unrecognized network-status
1420 docs. Now we can add new authdirservers and they'll be cached too.
1421 - When picking a random directory, prefer non-authorities if any
1423 - New controller option "getinfo desc/all-recent" to fetch the
1424 latest server descriptor for every router that Tor knows about.
1427 Changes in version 0.1.0.16 - 2006-01-02
1428 o Crash bugfixes on 0.1.0.x:
1429 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1430 corrupting the heap, losing FDs, or crashing when we need to resize
1431 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1432 - It turns out sparc64 platforms crash on unaligned memory access
1433 too -- so detect and avoid this.
1434 - Handle truncated compressed data correctly (by detecting it and
1436 - Fix possible-but-unlikely free(NULL) in control.c.
1437 - When we were closing connections, there was a rare case that
1438 stomped on memory, triggering seg faults and asserts.
1439 - Avoid potential infinite recursion when building a descriptor. (We
1440 don't know that it ever happened, but better to fix it anyway.)
1441 - We were neglecting to unlink marked circuits from soon-to-close OR
1442 connections, which caused some rare scribbling on freed memory.
1443 - Fix a memory stomping race bug when closing the joining point of two
1444 rendezvous circuits.
1445 - Fix an assert in time parsing found by Steven Murdoch.
1447 o Other bugfixes on 0.1.0.x:
1448 - When we're doing reachability testing, provide more useful log
1449 messages so the operator knows what to expect.
1450 - Do not check whether DirPort is reachable when we are suppressing
1451 advertising it because of hibernation.
1452 - When building with -static or on Solaris, we sometimes needed -ldl.
1453 - One of the dirservers (tor26) changed its IP address.
1454 - When we're deciding whether a stream has enough circuits around
1455 that can handle it, count the freshly dirty ones and not the ones
1456 that are so dirty they won't be able to handle it.
1457 - When we're expiring old circuits, we had a logic error that caused
1458 us to close new rendezvous circuits rather than old ones.
1459 - Give a more helpful log message when you try to change ORPort via
1460 the controller: you should upgrade Tor if you want that to work.
1461 - We were failing to parse Tor versions that start with "Tor ".
1462 - Tolerate faulty streams better: when a stream fails for reason
1463 exitpolicy, stop assuming that the router is lying about his exit
1464 policy. When a stream fails for reason misc, allow it to retry just
1465 as if it was resolvefailed. When a stream has failed three times,
1466 reset its failure count so we can try again and get all three tries.
1469 Changes in version 0.1.1.10-alpha - 2005-12-11
1470 o Correctness bugfixes on 0.1.0.x:
1471 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1472 corrupting the heap, losing FDs, or crashing when we need to resize
1473 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1474 - Stop doing the complex voodoo overkill checking for insecure
1475 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
1476 - When we were closing connections, there was a rare case that
1477 stomped on memory, triggering seg faults and asserts.
1478 - We were neglecting to unlink marked circuits from soon-to-close OR
1479 connections, which caused some rare scribbling on freed memory.
1480 - When we're deciding whether a stream has enough circuits around
1481 that can handle it, count the freshly dirty ones and not the ones
1482 that are so dirty they won't be able to handle it.
1483 - Recover better from TCP connections to Tor servers that are
1484 broken but don't tell you (it happens!); and rotate TLS
1485 connections once a week.
1486 - When we're expiring old circuits, we had a logic error that caused
1487 us to close new rendezvous circuits rather than old ones.
1488 - Fix a scary-looking but apparently harmless bug where circuits
1489 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1490 servers, and never switch to state CIRCUIT_STATE_OPEN.
1491 - When building with -static or on Solaris, we sometimes needed to
1493 - Give a useful message when people run Tor as the wrong user,
1494 rather than telling them to start chowning random directories.
1495 - We were failing to inform the controller about new .onion streams.
1497 o Security bugfixes on 0.1.0.x:
1498 - Refuse server descriptors if the fingerprint line doesn't match
1499 the included identity key. Tor doesn't care, but other apps (and
1500 humans) might actually be trusting the fingerprint line.
1501 - We used to kill the circuit when we receive a relay command we
1502 don't recognize. Now we just drop it.
1503 - Start obeying our firewall options more rigorously:
1504 . If we can't get to a dirserver directly, try going via Tor.
1505 . Don't ever try to connect (as a client) to a place our
1506 firewall options forbid.
1507 . If we specify a proxy and also firewall options, obey the
1508 firewall options even when we're using the proxy: some proxies
1509 can only proxy to certain destinations.
1510 - Fix a bug found by Lasse Overlier: when we were making internal
1511 circuits (intended to be cannibalized later for rendezvous and
1512 introduction circuits), we were picking them so that they had
1513 useful exit nodes. There was no need for this, and it actually
1514 aids some statistical attacks.
1515 - Start treating internal circuits and exit circuits separately.
1516 It's important to keep them separate because internal circuits
1517 have their last hops picked like middle hops, rather than like
1518 exit hops. So exiting on them will break the user's expectations.
1520 o Bugfixes on 0.1.1.x:
1521 - Take out the mis-feature where we tried to detect IP address
1522 flapping for people with DynDNS, and chose not to upload a new
1523 server descriptor sometimes.
1524 - Try to be compatible with OpenSSL 0.9.6 again.
1525 - Log fix: when the controller is logging about .onion addresses,
1526 sometimes it didn't include the ".onion" part of the address.
1527 - Don't try to modify options->DirServers internally -- if the
1528 user didn't specify any, just add the default ones directly to
1529 the trusted dirserver list. This fixes a bug where people running
1530 controllers would use SETCONF on some totally unrelated config
1531 option, and Tor would start yelling at them about changing their
1533 - Let the controller's redirectstream command specify a port, in
1534 case the controller wants to change that too.
1535 - When we requested a pile of server descriptors, we sometimes
1536 accidentally launched a duplicate request for the first one.
1537 - Bugfix for trackhostexits: write down the fingerprint of the
1538 chosen exit, not its nickname, because the chosen exit might not
1540 - When parsing foo.exit, if foo is unknown, and we are leaving
1541 circuits unattached, set the chosen_exit field and leave the
1542 address empty. This matters because controllers got confused
1544 - Directory authorities no longer try to download server
1545 descriptors that they know they will reject.
1547 o Features and updates:
1548 - Replace balanced trees with hash tables: this should make stuff
1549 significantly faster.
1550 - Resume using the AES counter-mode implementation that we ship,
1551 rather than OpenSSL's. Ours is significantly faster.
1552 - Many other CPU and memory improvements.
1553 - Add a new config option FastFirstHopPK (on by default) so clients
1554 do a trivial crypto handshake for their first hop, since TLS has
1555 already taken care of confidentiality and authentication.
1556 - Add a new config option TestSocks so people can see if their
1557 applications are using socks4, socks4a, socks5-with-ip, or
1558 socks5-with-hostname. This way they don't have to keep mucking
1559 with tcpdump and wondering if something got cached somewhere.
1560 - Warn when listening on a public address for socks. I suspect a
1561 lot of people are setting themselves up as open socks proxies,
1562 and they have no idea that jerks on the Internet are using them,
1563 since they simply proxy the traffic into the Tor network.
1564 - Add "private:*" as an alias in configuration for policies. Now
1565 you can simplify your exit policy rather than needing to list
1566 every single internal or nonroutable network space.
1567 - Add a new controller event type that allows controllers to get
1568 all server descriptors that were uploaded to a router in its role
1569 as authoritative dirserver.
1570 - Start shipping socks-extensions.txt, tor-doc-unix.html,
1571 tor-doc-server.html, and stylesheet.css in the tarball.
1572 - Stop shipping tor-doc.html in the tarball.
1575 Changes in version 0.1.1.9-alpha - 2005-11-15
1576 o Usability improvements:
1577 - Start calling it FooListenAddress rather than FooBindAddress,
1578 since few of our users know what it means to bind an address
1580 - Reduce clutter in server logs. We're going to try to make
1581 them actually usable now. New config option ProtocolWarnings that
1582 lets you hear about how _other Tors_ are breaking the protocol. Off
1584 - Divide log messages into logging domains. Once we put some sort
1585 of interface on this, it will let people looking at more verbose
1586 log levels specify the topics they want to hear more about.
1587 - Make directory servers return better http 404 error messages
1588 instead of a generic "Servers unavailable".
1589 - Check for even more Windows version flags when writing the platform
1590 string in server descriptors, and note any we don't recognize.
1591 - Clean up more of the OpenSSL memory when exiting, so we can detect
1592 memory leaks better.
1593 - Make directory authorities be non-versioning, non-naming by
1594 default. Now we can add new directory servers without requiring
1595 their operators to pay close attention.
1596 - When logging via syslog, include the pid whenever we provide
1597 a log entry. Suggested by Todd Fries.
1599 o Performance improvements:
1600 - Directory servers now silently throw away new descriptors that
1601 haven't changed much if the timestamps are similar. We do this to
1602 tolerate older Tor servers that upload a new descriptor every 15
1603 minutes. (It seemed like a good idea at the time.)
1604 - Inline bottleneck smartlist functions; use fast versions by default.
1605 - Add a "Map from digest to void*" abstraction digestmap_t so we
1606 can do less hex encoding/decoding. Use it in router_get_by_digest()
1607 to resolve a performance bottleneck.
1608 - Allow tor_gzip_uncompress to extract as much as possible from
1609 truncated compressed data. Try to extract as many
1610 descriptors as possible from truncated http responses (when
1611 DIR_PURPOSE_FETCH_ROUTERDESC).
1612 - Make circ->onionskin a pointer, not a static array. moria2 was using
1613 125000 circuit_t's after it had been up for a few weeks, which
1614 translates to 20+ megs of wasted space.
1615 - The private half of our EDH handshake keys are now chosen out
1616 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
1618 o Security improvements:
1619 - Start making directory caches retain old routerinfos, so soon
1620 clients can start asking by digest of descriptor rather than by
1621 fingerprint of server.
1622 - Add half our entropy from RAND_poll in OpenSSL. This knows how
1623 to use egd (if present), openbsd weirdness (if present), vms/os2
1624 weirdness (if we ever port there), and more in the future.
1626 o Bugfixes on 0.1.0.x:
1627 - Do round-robin writes of at most 16 kB per write. This might be
1628 more fair on loaded Tor servers, and it might resolve our Windows
1629 crash bug. It might also slow things down.
1630 - Our TLS handshakes were generating a single public/private
1631 keypair for the TLS context, rather than making a new one for
1632 each new connections. Oops. (But we were still rotating them
1633 periodically, so it's not so bad.)
1634 - When we were cannibalizing a circuit with a particular exit
1635 node in mind, we weren't checking to see if that exit node was
1636 already present earlier in the circuit. Oops.
1637 - When a Tor server's IP changes (e.g. from a dyndns address),
1638 upload a new descriptor so clients will learn too.
1639 - Really busy servers were keeping enough circuits open on stable
1640 connections that they were wrapping around the circuit_id
1641 space. (It's only two bytes.) This exposed a bug where we would
1642 feel free to reuse a circuit_id even if it still exists but has
1643 been marked for close. Try to fix this bug. Some bug remains.
1644 - If we would close a stream early (e.g. it asks for a .exit that
1645 we know would refuse it) but the LeaveStreamsUnattached config
1646 option is set by the controller, then don't close it.
1648 o Bugfixes on 0.1.1.8-alpha:
1649 - Fix a big pile of memory leaks, some of them serious.
1650 - Do not try to download a routerdesc if we would immediately reject
1652 - Resume inserting a newline between all router descriptors when
1653 generating (old style) signed directories, since our spec says
1655 - When providing content-type application/octet-stream for
1656 server descriptors using .z, we were leaving out the
1657 content-encoding header. Oops. (Everything tolerated this just
1658 fine, but that doesn't mean we need to be part of the problem.)
1659 - Fix a potential seg fault in getconf and getinfo using version 1
1660 of the controller protocol.
1661 - Avoid crash: do not check whether DirPort is reachable when we
1662 are suppressing it because of hibernation.
1663 - Make --hash-password not crash on exit.
1666 Changes in version 0.1.1.8-alpha - 2005-10-07
1667 o New features (major):
1668 - Clients don't download or use the directory anymore. Now they
1669 download and use network-statuses from the trusted dirservers,
1670 and fetch individual server descriptors as needed from mirrors.
1671 See dir-spec.txt for all the gory details.
1672 - Be more conservative about whether to advertise our DirPort.
1673 The main change is to not advertise if we're running at capacity
1674 and either a) we could hibernate or b) our capacity is low and
1675 we're using a default DirPort.
1676 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
1678 o New features (minor):
1679 - Try to be smart about when to retry network-status and
1680 server-descriptor fetches. Still needs some tuning.
1681 - Stop parsing, storing, or using running-routers output (but
1682 mirrors still cache and serve it).
1683 - Consider a threshold of versioning dirservers (dirservers who have
1684 an opinion about which Tor versions are still recommended) before
1685 deciding whether to warn the user that he's obsolete.
1686 - Dirservers can now reject/invalidate by key and IP, with the
1687 config options "AuthDirInvalid" and "AuthDirReject". This is
1688 useful since currently we automatically list servers as running
1689 and usable even if we know they're jerks.
1690 - Provide dire warnings to any users who set DirServer; move it out
1691 of torrc.sample and into torrc.complete.
1692 - Add MyFamily to torrc.sample in the server section.
1693 - Add nicknames to the DirServer line, so we can refer to them
1694 without requiring all our users to memorize their IP addresses.
1695 - When we get an EOF or a timeout on a directory connection, note
1696 how many bytes of serverdesc we are dropping. This will help
1697 us determine whether it is smart to parse incomplete serverdesc
1699 - Add a new function to "change pseudonyms" -- that is, to stop
1700 using any currently-dirty circuits for new streams, so we don't
1701 link new actions to old actions. Currently it's only called on
1702 HUP (or SIGNAL RELOAD).
1703 - On sighup, if UseHelperNodes changed to 1, use new circuits.
1704 - Start using RAND_bytes rather than RAND_pseudo_bytes from
1705 OpenSSL. Also, reseed our entropy every hour, not just at
1706 startup. And entropy in 512-bit chunks, not 160-bit chunks.
1708 o Fixes on 0.1.1.7-alpha:
1709 - Nobody ever implemented EVENT_ADDRMAP for control protocol
1710 version 0, so don't let version 0 controllers ask for it.
1711 - If you requested something with too many newlines via the
1712 v1 controller protocol, you could crash tor.
1713 - Fix a number of memory leaks, including some pretty serious ones.
1714 - Re-enable DirPort testing again, so Tor servers will be willing
1715 to advertise their DirPort if it's reachable.
1716 - On TLS handshake, only check the other router's nickname against
1717 its expected nickname if is_named is set.
1719 o Fixes forward-ported from 0.1.0.15:
1720 - Don't crash when we don't have any spare file descriptors and we
1721 try to spawn a dns or cpu worker.
1722 - Make the numbers in read-history and write-history into uint64s,
1723 so they don't overflow and publish negatives in the descriptor.
1726 - For the OS X package's modified privoxy config file, comment
1727 out the "logfile" line so we don't log everything passed
1729 - We were whining about using socks4 or socks5-with-local-lookup
1730 even when it's an IP in the "virtual" range we designed exactly
1732 - We were leaking some memory every time the client changes IPs.
1733 - Never call free() on tor_malloc()d memory. This will help us
1734 use dmalloc to detect memory leaks.
1735 - Check for named servers when looking them up by nickname;
1736 warn when we'recalling a non-named server by its nickname;
1737 don't warn twice about the same name.
1738 - Try to list MyFamily elements by key, not by nickname, and warn
1739 if we've not heard of the server.
1740 - Make windows platform detection (uname equivalent) smarter.
1741 - It turns out sparc64 doesn't like unaligned access either.
1744 Changes in version 0.1.0.15 - 2005-09-23
1745 o Bugfixes on 0.1.0.x:
1746 - Reject ports 465 and 587 (spam targets) in default exit policy.
1747 - Don't crash when we don't have any spare file descriptors and we
1748 try to spawn a dns or cpu worker.
1749 - Get rid of IgnoreVersion undocumented config option, and make us
1750 only warn, never exit, when we're running an obsolete version.
1751 - Don't try to print a null string when your server finds itself to
1752 be unreachable and the Address config option is empty.
1753 - Make the numbers in read-history and write-history into uint64s,
1754 so they don't overflow and publish negatives in the descriptor.
1755 - Fix a minor memory leak in smartlist_string_remove().
1756 - We were only allowing ourselves to upload a server descriptor at
1757 most every 20 minutes, even if it changed earlier than that.
1758 - Clean up log entries that pointed to old URLs.
1761 Changes in version 0.1.1.7-alpha - 2005-09-14
1762 o Fixes on 0.1.1.6-alpha:
1763 - Exit servers were crashing when people asked them to make a
1764 connection to an address not in their exit policy.
1765 - Looking up a non-existent stream for a v1 control connection would
1767 - Fix a seg fault if we ask a dirserver for a descriptor by
1768 fingerprint but he doesn't know about him.
1769 - SETCONF was appending items to linelists, not clearing them.
1770 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
1771 out and refuse the setconf if it would fail.
1772 - Downgrade the dirserver log messages when whining about
1776 - Add Peter Palfrader's check-tor script to tor/contrib/
1777 It lets you easily check whether a given server (referenced by
1778 nickname) is reachable by you.
1779 - Numerous changes to move towards client-side v2 directories. Not
1783 - If the user gave tor an odd number of command-line arguments,
1784 we were silently ignoring the last one. Now we complain and fail.
1785 [This wins the oldest-bug prize -- this bug has been present since
1786 November 2002, as released in Tor 0.0.0.]
1787 - Do not use unaligned memory access on alpha, mips, or mipsel.
1788 It *works*, but is very slow, so we treat them as if it doesn't.
1789 - Retry directory requests if we fail to get an answer we like
1790 from a given dirserver (we were retrying before, but only if
1791 we fail to connect).
1792 - When writing the RecommendedVersions line, sort them first.
1793 - When the client asked for a rendezvous port that the hidden
1794 service didn't want to provide, we were sending an IP address
1795 back along with the end cell. Fortunately, it was zero. But stop
1797 - Correct "your server is reachable" log entries to indicate that
1798 it was self-testing that told us so.
1801 Changes in version 0.1.1.6-alpha - 2005-09-09
1802 o Fixes on 0.1.1.5-alpha:
1803 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
1804 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
1805 - Fix bug with tor_memmem finding a match at the end of the string.
1806 - Make unit tests run without segfaulting.
1807 - Resolve some solaris x86 compile warnings.
1808 - Handle duplicate lines in approved-routers files without warning.
1809 - Fix bug where as soon as a server refused any requests due to his
1810 exit policy (e.g. when we ask for localhost and he tells us that's
1811 127.0.0.1 and he won't do it), we decided he wasn't obeying his
1812 exit policy using him for any exits.
1813 - Only do openssl hardware accelerator stuff if openssl version is
1816 o New controller features/fixes:
1817 - Add a "RESETCONF" command so you can set config options like
1818 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
1819 a config option in the torrc with no value, then it clears it
1820 entirely (rather than setting it to its default).
1821 - Add a "GETINFO config-file" to tell us where torrc is.
1822 - Avoid sending blank lines when GETINFO replies should be empty.
1823 - Add a QUIT command for the controller (for using it manually).
1824 - Fix a bug in SAVECONF that was adding default dirservers and
1825 other redundant entries to the torrc file.
1827 o Start on the new directory design:
1828 - Generate, publish, cache, serve new network-status format.
1829 - Publish individual descriptors (by fingerprint, by "all", and by
1831 - Publish client and server recommended versions separately.
1832 - Allow tor_gzip_uncompress() to handle multiple concatenated
1833 compressed strings. Serve compressed groups of router
1834 descriptors. The compression logic here could be more
1836 - Distinguish v1 authorities (all currently trusted directories)
1837 from v2 authorities (all trusted directories).
1838 - Change DirServers config line to note which dirs are v1 authorities.
1839 - Add configuration option "V1AuthoritativeDirectory 1" which
1840 moria1, moria2, and tor26 should set.
1841 - Remove option when getting directory cache to see whether they
1842 support running-routers; they all do now. Replace it with one
1843 to see whether caches support v2 stuff.
1846 - Dirservers now do their own external reachability testing of each
1847 Tor server, and only list them as running if they've been found to
1848 be reachable. We also send back warnings to the server's logs if
1849 it uploads a descriptor that we already believe is unreachable.
1850 - Implement exit enclaves: if we know an IP address for the
1851 destination, and there's a running Tor server at that address
1852 which allows exit to the destination, then extend the circuit to
1853 that exit first. This provides end-to-end encryption and end-to-end
1854 authentication. Also, if the user wants a .exit address or enclave,
1855 use 4 hops rather than 3, and cannibalize a general circ for it
1857 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
1858 controller. Also, rotate dns and cpu workers if the controller
1859 changes options that will affect them; and initialize the dns
1860 worker cache tree whether or not we start out as a server.
1861 - Only upload a new server descriptor when options change, 18
1862 hours have passed, uptime is reset, or bandwidth changes a lot.
1863 - Check [X-]Forwarded-For headers in HTTP requests when generating
1864 log messages. This lets people run dirservers (and caches) behind
1865 Apache but still know which IP addresses are causing warnings.
1867 o Config option changes:
1868 - Replace (Fascist)Firewall* config options with a new
1869 ReachableAddresses option that understands address policies.
1870 For example, "ReachableAddresses *:80,*:443"
1871 - Get rid of IgnoreVersion undocumented config option, and make us
1872 only warn, never exit, when we're running an obsolete version.
1873 - Make MonthlyAccountingStart config option truly obsolete now.
1876 - Reject ports 465 and 587 in the default exit policy, since
1877 people have started using them for spam too.
1878 - It turns out we couldn't bootstrap a network since we added
1879 reachability detection in 0.1.0.1-rc. Good thing the Tor network
1880 has never gone down. Add an AssumeReachable config option to let
1881 servers and dirservers bootstrap. When we're trying to build a
1882 high-uptime or high-bandwidth circuit but there aren't enough
1883 suitable servers, try being less picky rather than simply failing.
1884 - Our logic to decide if the OR we connected to was the right guy
1885 was brittle and maybe open to a mitm for unverified routers.
1886 - We weren't cannibalizing circuits correctly for
1887 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
1888 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
1889 build those from scratch. This should make hidden services faster.
1890 - Predict required circuits better, with an eye toward making hidden
1891 services faster on the service end.
1892 - Retry streams if the exit node sends back a 'misc' failure. This
1893 should result in fewer random failures. Also, after failing
1894 from resolve failed or misc, reset the num failures, so we give
1895 it a fair shake next time we try.
1896 - Clean up the rendezvous warn log msgs, and downgrade some to info.
1897 - Reduce severity on logs about dns worker spawning and culling.
1898 - When we're shutting down and we do something like try to post a
1899 server descriptor or rendezvous descriptor, don't complain that
1900 we seem to be unreachable. Of course we are, we're shutting down.
1901 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
1902 We don't use them yet, but maybe one day our DNS resolver will be
1903 able to discover them.
1904 - Make ContactInfo mandatory for authoritative directory servers.
1905 - Require server descriptors to list IPv4 addresses -- hostnames
1906 are no longer allowed. This also fixes some potential security
1907 problems with people providing hostnames as their address and then
1908 preferentially resolving them to partition users.
1909 - Change log line for unreachability to explicitly suggest /etc/hosts
1910 as the culprit. Also make it clearer what IP address and ports we're
1911 testing for reachability.
1912 - Put quotes around user-supplied strings when logging so users are
1913 more likely to realize if they add bad characters (like quotes)
1915 - Let auth dir servers start without specifying an Address config
1917 - Make unit tests (and other invocations that aren't the real Tor)
1918 run without launching listeners, creating subdirectories, and so on.
1921 Changes in version 0.1.1.5-alpha - 2005-08-08
1922 o Bugfixes included in 0.1.0.14.
1924 o Bugfixes on 0.1.0.x:
1925 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
1926 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
1927 it would silently using ignore the 6668.
1930 Changes in version 0.1.0.14 - 2005-08-08
1931 o Bugfixes on 0.1.0.x:
1932 - Fix the other half of the bug with crypto handshakes
1934 - Fix an assert trigger if you send a 'signal term' via the
1935 controller when it's listening for 'event info' messages.
1938 Changes in version 0.1.1.4-alpha - 2005-08-04
1939 o Bugfixes included in 0.1.0.13.
1942 - Improve tor_gettimeofday() granularity on windows.
1943 - Make clients regenerate their keys when their IP address changes.
1944 - Implement some more GETINFO goodness: expose helper nodes, config
1945 options, getinfo keys.
1948 Changes in version 0.1.0.13 - 2005-08-04
1949 o Bugfixes on 0.1.0.x:
1950 - Fix a critical bug in the security of our crypto handshakes.
1951 - Fix a size_t underflow in smartlist_join_strings2() that made
1952 it do bad things when you hand it an empty smartlist.
1953 - Fix Windows installer to ship Tor license (thanks to Aphex for
1954 pointing out this oversight) and put a link to the doc directory
1956 - Explicitly set no-unaligned-access for sparc: it turns out the
1957 new gcc's let you compile broken code, but that doesn't make it
1961 Changes in version 0.1.1.3-alpha - 2005-07-23
1962 o Bugfixes on 0.1.1.2-alpha:
1963 - Fix a bug in handling the controller's "post descriptor"
1965 - Fix several bugs in handling the controller's "extend circuit"
1967 - Fix a bug in handling the controller's "stream status" event.
1968 - Fix an assert failure if we have a controller listening for
1969 circuit events and we go offline.
1970 - Re-allow hidden service descriptors to publish 0 intro points.
1971 - Fix a crash when generating your hidden service descriptor if
1972 you don't have enough intro points already.
1974 o New features on 0.1.1.2-alpha:
1975 - New controller function "getinfo accounting", to ask how
1976 many bytes we've used in this time period.
1977 - Experimental support for helper nodes: a lot of the risk from
1978 a small static adversary comes because users pick new random
1979 nodes every time they rebuild a circuit. Now users will try to
1980 stick to the same small set of entry nodes if they can. Not
1981 enabled by default yet.
1983 o Bugfixes on 0.1.0.12:
1984 - If you're an auth dir server, always publish your dirport,
1985 even if you haven't yet found yourself to be reachable.
1986 - Fix a size_t underflow in smartlist_join_strings2() that made
1987 it do bad things when you hand it an empty smartlist.
1990 Changes in version 0.1.0.12 - 2005-07-18
1991 o New directory servers:
1992 - tor26 has changed IP address.
1994 o Bugfixes on 0.1.0.x:
1995 - Fix a possible double-free in tor_gzip_uncompress().
1996 - When --disable-threads is set, do not search for or link against
1998 - Don't trigger an assert if an authoritative directory server
1999 claims its dirport is 0.
2000 - Fix bug with removing Tor as an NT service: some people were
2001 getting "The service did not return an error." Thanks to Matt
2005 Changes in version 0.1.1.2-alpha - 2005-07-15
2006 o New directory servers:
2007 - tor26 has changed IP address.
2009 o Bugfixes on 0.1.0.x, crashes/leaks:
2010 - Port the servers-not-obeying-their-exit-policies fix from
2012 - Fix an fd leak in start_daemon().
2013 - On Windows, you can't always reopen a port right after you've
2014 closed it. So change retry_listeners() to only close and re-open
2015 ports that have changed.
2016 - Fix a possible double-free in tor_gzip_uncompress().
2018 o Bugfixes on 0.1.0.x, usability:
2019 - When tor_socketpair() fails in Windows, give a reasonable
2020 Windows-style errno back.
2021 - Let people type "tor --install" as well as "tor -install" when
2023 want to make it an NT service.
2024 - NT service patch from Matt Edman to improve error messages.
2025 - When the controller asks for a config option with an abbreviated
2026 name, give the full name in our response.
2027 - Correct the man page entry on TrackHostExitsExpire.
2028 - Looks like we were never delivering deflated (i.e. compressed)
2029 running-routers lists, even when asked. Oops.
2030 - When --disable-threads is set, do not search for or link against
2033 o Bugfixes on 0.1.1.x:
2034 - Fix a seg fault with autodetecting which controller version is
2038 - New hidden service descriptor format: put a version in it, and
2039 let people specify introduction/rendezvous points that aren't
2040 in "the directory" (which is subjective anyway).
2041 - Allow the DEBUG controller event to work again. Mark certain log
2042 entries as "don't tell this to controllers", so we avoid cycles.
2045 Changes in version 0.1.0.11 - 2005-06-30
2046 o Bugfixes on 0.1.0.x:
2047 - Fix major security bug: servers were disregarding their
2048 exit policies if clients behaved unexpectedly.
2049 - Make OS X init script check for missing argument, so we don't
2050 confuse users who invoke it incorrectly.
2051 - Fix a seg fault in "tor --hash-password foo".
2052 - The MAPADDRESS control command was broken.
2055 Changes in version 0.1.1.1-alpha - 2005-06-29
2057 - Make OS X init script check for missing argument, so we don't
2058 confuse users who invoke it incorrectly.
2059 - Fix a seg fault in "tor --hash-password foo".
2060 - Fix a possible way to DoS dirservers.
2061 - When we complain that your exit policy implicitly allows local or
2062 private address spaces, name them explicitly so operators can
2064 - Make the log message less scary when all the dirservers are
2065 temporarily unreachable.
2066 - We were printing the number of idle dns workers incorrectly when
2070 - Revised controller protocol (version 1) that uses ascii rather
2071 than binary. Add supporting libraries in python and java so you
2072 can use the controller from your applications without caring how
2074 - Spiffy new support for crypto hardware accelerators. Can somebody
2078 Changes in version 0.0.9.10 - 2005-06-16
2079 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
2080 - Refuse relay cells that claim to have a length larger than the
2081 maximum allowed. This prevents a potential attack that could read
2082 arbitrary memory (e.g. keys) from an exit server's process
2086 Changes in version 0.1.0.10 - 2005-06-14
2087 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
2088 libevent before 1.1a.
2091 Changes in version 0.1.0.9-rc - 2005-06-09
2093 - Reset buf->highwater every time buf_shrink() is called, not just on
2094 a successful shrink. This was causing significant memory bloat.
2095 - Fix buffer overflow when checking hashed passwords.
2096 - Security fix: if seeding the RNG on Win32 fails, quit.
2097 - Allow seeding the RNG on Win32 even when you're not running as
2099 - Disable threading on Solaris too. Something is wonky with it,
2100 cpuworkers, and reentrant libs.
2101 - Reenable the part of the code that tries to flush as soon as an
2102 OR outbuf has a full TLS record available. Perhaps this will make
2103 OR outbufs not grow as huge except in rare cases, thus saving lots
2104 of CPU time plus memory.
2105 - Reject malformed .onion addresses rather then passing them on as
2106 normal web requests.
2107 - Adapt patch from Adam Langley: fix possible memory leak in
2108 tor_lookup_hostname().
2109 - Initialize libevent later in the startup process, so the logs are
2110 already established by the time we start logging libevent warns.
2111 - Use correct errno on win32 if libevent fails.
2112 - Check and warn about known-bad/slow libevent versions.
2113 - Pay more attention to the ClientOnly config option.
2114 - Have torctl.in/tor.sh.in check for location of su binary (needed
2116 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
2117 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
2118 HttpProxyAuthenticator
2119 - Stop warning about sigpipes in the logs. We're going to
2120 pretend that getting these occassionally is normal and fine.
2121 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
2123 installer screens; and don't put stuff into StartupItems unless
2124 the user asks you to.
2125 - Require servers that use the default dirservers to have public IP
2126 addresses. We have too many servers that are configured with private
2127 IPs and their admins never notice the log entries complaining that
2128 their descriptors are being rejected.
2129 - Add OSX uninstall instructions. An actual uninstall script will
2133 Changes in version 0.1.0.8-rc - 2005-05-23
2135 - It turns out that kqueue on OS X 10.3.9 was causing kernel
2136 panics. Disable kqueue on all OS X Tors.
2137 - Fix RPM: remove duplicate line accidentally added to the rpm
2139 - Disable threads on openbsd too, since its gethostaddr is not
2141 - Tolerate libevent 0.8 since it still works, even though it's
2143 - Enable building on Red Hat 9.0 again.
2144 - Allow the middle hop of the testing circuit to be running any
2145 version, now that most of them have the bugfix to let them connect
2146 to unknown servers. This will allow reachability testing to work
2147 even when 0.0.9.7-0.0.9.9 become obsolete.
2148 - Handle relay cells with rh.length too large. This prevents
2149 a potential attack that could read arbitrary memory (maybe even
2150 keys) from the exit server's process.
2151 - We screwed up the dirport reachability testing when we don't yet
2152 have a cached version of the directory. Hopefully now fixed.
2153 - Clean up router_load_single_router() (used by the controller),
2154 so it doesn't seg fault on error.
2155 - Fix a minor memory leak when somebody establishes an introduction
2156 point at your Tor server.
2157 - If a socks connection ends because read fails, don't warn that
2158 you're not sending a socks reply back.
2161 - Add HttpProxyAuthenticator config option too, that works like
2162 the HttpsProxyAuthenticator config option.
2163 - Encode hashed controller passwords in hex instead of base64,
2164 to make it easier to write controllers.
2167 Changes in version 0.1.0.7-rc - 2005-05-17
2169 - Fix a bug in the OS X package installer that prevented it from
2170 installing on Tiger.
2171 - Fix a script bug in the OS X package installer that made it
2172 complain during installation.
2173 - Find libevent even if it's hiding in /usr/local/ and your
2174 CFLAGS and LDFLAGS don't tell you to look there.
2175 - Be able to link with libevent as a shared library (the default
2176 after 1.0d), even if it's hiding in /usr/local/lib and even
2177 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
2178 assuming you're running gcc. Otherwise fail and give a useful
2180 - Fix a bug in the RPM packager: set home directory for _tor to
2181 something more reasonable when first installing.
2182 - Free a minor amount of memory that is still reachable on exit.
2185 Changes in version 0.1.0.6-rc - 2005-05-14
2187 - Implement --disable-threads configure option. Disable threads on
2188 netbsd by default, because it appears to have no reentrant resolver
2190 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
2191 release (1.1) detects and disables kqueue if it's broken.
2192 - Append default exit policy before checking for implicit internal
2193 addresses. Now we don't log a bunch of complaints on startup
2194 when using the default exit policy.
2195 - Some people were putting "Address " in their torrc, and they had
2196 a buggy resolver that resolved " " to 0.0.0.0. Oops.
2197 - If DataDir is ~/.tor, and that expands to /.tor, then default to
2198 LOCALSTATEDIR/tor instead.
2199 - Fix fragmented-message bug in TorControl.py.
2200 - Resolve a minor bug which would prevent unreachable dirports
2201 from getting suppressed in the published descriptor.
2202 - When the controller gave us a new descriptor, we weren't resolving
2203 it immediately, so Tor would think its address was 0.0.0.0 until
2204 we fetched a new directory.
2205 - Fix an uppercase/lowercase case error in suppressing a bogus
2206 libevent warning on some Linuxes.
2209 - Begin scrubbing sensitive strings from logs by default. Turn off
2210 the config option SafeLogging if you need to do debugging.
2211 - Switch to a new buffer management algorithm, which tries to avoid
2212 reallocing and copying quite as much. In first tests it looks like
2213 it uses *more* memory on average, but less cpu.
2214 - First cut at support for "create-fast" cells. Clients can use
2215 these when extending to their first hop, since the TLS already
2216 provides forward secrecy and authentication. Not enabled on
2218 - When dirservers refuse a router descriptor, we now log its
2219 contactinfo, platform, and the poster's IP address.
2220 - Call tor_free_all instead of connections_free_all after forking, to
2221 save memory on systems that need to fork.
2222 - Whine at you if you're a server and you don't set your contactinfo.
2223 - Implement --verify-config command-line option to check if your torrc
2224 is valid without actually launching Tor.
2225 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
2226 rather than just rejecting it.
2229 Changes in version 0.1.0.5-rc - 2005-04-27
2231 - Stop trying to print a null pointer if an OR conn fails because
2232 we didn't like its cert.
2234 - Switch our internal buffers implementation to use a ring buffer,
2235 to hopefully improve performance for fast servers a lot.
2236 - Add HttpsProxyAuthenticator support (basic auth only), based
2237 on patch from Adam Langley.
2238 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
2239 the fast servers that have been joining lately.
2240 - Give hidden service accesses extra time on the first attempt,
2241 since 60 seconds is often only barely enough. This might improve
2243 - Improve performance for dirservers: stop re-parsing the whole
2244 directory every time you regenerate it.
2245 - Add more debugging info to help us find the weird dns freebsd
2246 pthreads bug; cleaner debug messages to help track future issues.
2249 Changes in version 0.0.9.9 - 2005-04-23
2250 o Bugfixes on 0.0.9.x:
2251 - If unofficial Tor clients connect and send weird TLS certs, our
2252 Tor server triggers an assert. This release contains a minimal
2253 backport from the broader fix that we put into 0.1.0.4-rc.
2256 Changes in version 0.1.0.4-rc - 2005-04-23
2258 - If unofficial Tor clients connect and send weird TLS certs, our
2259 Tor server triggers an assert. Stop asserting, and start handling
2260 TLS errors better in other situations too.
2261 - When the controller asks us to tell it about all the debug-level
2262 logs, it turns out we were generating debug-level logs while
2263 telling it about them, which turns into a bad loop. Now keep
2264 track of whether you're sending a debug log to the controller,
2265 and don't log when you are.
2266 - Fix the "postdescriptor" feature of the controller interface: on
2267 non-complete success, only say "done" once.
2269 - Clients are now willing to load balance over up to 2mB, not 1mB,
2270 of advertised bandwidth capacity.
2271 - Add a NoPublish config option, so you can be a server (e.g. for
2272 testing running Tor servers in other Tor networks) without
2273 publishing your descriptor to the primary dirservers.
2276 Changes in version 0.1.0.3-rc - 2005-04-08
2277 o Improvements on 0.1.0.2-rc:
2278 - Client now retries when streams end early for 'hibernating' or
2279 'resource limit' reasons, rather than failing them.
2280 - More automated handling for dirserver operators:
2281 - Automatically approve nodes running 0.1.0.2-rc or later,
2282 now that the the reachability detection stuff is working.
2283 - Now we allow two unverified servers with the same nickname
2284 but different keys. But if a nickname is verified, only that
2285 nickname+key are allowed.
2286 - If you're an authdirserver connecting to an address:port,
2287 and it's not the OR you were expecting, forget about that
2288 descriptor. If he *was* the one you were expecting, then forget
2289 about all other descriptors for that address:port.
2290 - Allow servers to publish descriptors from 12 hours in the future.
2291 Corollary: only whine about clock skew from the dirserver if
2292 he's a trusted dirserver (since now even verified servers could
2293 have quite wrong clocks).
2294 - Adjust maximum skew and age for rendezvous descriptors: let skew
2295 be 48 hours rather than 90 minutes.
2296 - Efficiency improvements:
2297 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
2298 it much faster to look up a circuit for each relay cell.
2299 - Remove most calls to assert_all_pending_dns_resolves_ok(),
2300 since they're eating our cpu on exit nodes.
2301 - Stop wasting time doing a case insensitive comparison for every
2302 dns name every time we do any lookup. Canonicalize the names to
2303 lowercase and be done with it.
2304 - Start sending 'truncated' cells back rather than destroy cells,
2305 if the circuit closes in front of you. This means we won't have
2306 to abandon partially built circuits.
2307 - Only warn once per nickname from add_nickname_list_to_smartlist
2308 per failure, so an entrynode or exitnode choice that's down won't
2310 - Put a note in the torrc about abuse potential with the default
2312 - Revise control spec and implementation to allow all log messages to
2313 be sent to controller with their severities intact (suggested by
2314 Matt Edman). Update TorControl to handle new log event types.
2315 - Provide better explanation messages when controller's POSTDESCRIPTOR
2317 - Stop putting nodename in the Platform string in server descriptors.
2318 It doesn't actually help, and it is confusing/upsetting some people.
2320 o Bugfixes on 0.1.0.2-rc:
2321 - We were printing the host mask wrong in exit policies in server
2322 descriptors. This isn't a critical bug though, since we were still
2323 obeying the exit policy internally.
2324 - Fix Tor when compiled with libevent but without pthreads: move
2325 connection_unregister() from _connection_free() to
2327 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
2328 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
2329 when we look through the connection array, we'll find any of the
2330 cpu/dnsworkers. This is no good.
2332 o Bugfixes on 0.0.9.8:
2333 - Fix possible bug on threading platforms (e.g. win32) which was
2334 leaking a file descriptor whenever a cpuworker or dnsworker died.
2335 - When using preferred entry or exit nodes, ignore whether the
2336 circuit wants uptime or capacity. They asked for the nodes, they
2338 - chdir() to your datadirectory at the *end* of the daemonize process,
2339 not the beginning. This was a problem because the first time you
2340 run tor, if your datadir isn't there, and you have runasdaemon set
2341 to 1, it will try to chdir to it before it tries to create it. Oops.
2342 - Handle changed router status correctly when dirserver reloads
2343 fingerprint file. We used to be dropping all unverified descriptors
2344 right then. The bug was hidden because we would immediately
2345 fetch a directory from another dirserver, which would include the
2346 descriptors we just dropped.
2347 - When we're connecting to an OR and he's got a different nickname/key
2348 than we were expecting, only complain loudly if we're an OP or a
2349 dirserver. Complaining loudly to the OR admins just confuses them.
2350 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
2351 artificially capped at 500kB.
2354 Changes in version 0.0.9.8 - 2005-04-07
2355 o Bugfixes on 0.0.9.x:
2356 - We have a bug that I haven't found yet. Sometimes, very rarely,
2357 cpuworkers get stuck in the 'busy' state, even though the cpuworker
2358 thinks of itself as idle. This meant that no new circuits ever got
2359 established. Here's a workaround to kill any cpuworker that's been
2360 busy for more than 100 seconds.
2363 Changes in version 0.1.0.2-rc - 2005-04-01
2364 o Bugfixes on 0.1.0.1-rc:
2365 - Fixes on reachability detection:
2366 - Don't check for reachability while hibernating.
2367 - If ORPort is reachable but DirPort isn't, still publish the
2368 descriptor, but zero out DirPort until it's found reachable.
2369 - When building testing circs for ORPort testing, use only
2370 high-bandwidth nodes, so fewer circuits fail.
2371 - Complain about unreachable ORPort separately from unreachable
2372 DirPort, so the user knows what's going on.
2373 - Make sure we only conclude ORPort reachability if we didn't
2374 initiate the conn. Otherwise we could falsely conclude that
2375 we're reachable just because we connected to the guy earlier
2376 and he used that same pipe to extend to us.
2377 - Authdirservers shouldn't do ORPort reachability detection,
2378 since they're in clique mode, so it will be rare to find a
2379 server not already connected to them.
2380 - When building testing circuits, always pick middle hops running
2381 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
2382 bug. (This is a kludge; it will go away when 0.0.9.x becomes
2384 - When we decide we're reachable, actually publish our descriptor
2386 - Fix bug in redirectstream in the controller.
2387 - Fix the state descriptor strings so logs don't claim edge streams
2388 are in a different state than they actually are.
2389 - Use recent libevent features when possible (this only really affects
2390 win32 and osx right now, because the new libevent with these
2391 features hasn't been released yet). Add code to suppress spurious
2393 - Prevent possible segfault in connection_close_unattached_ap().
2394 - Fix newlines on torrc in win32.
2395 - Improve error msgs when tor-resolve fails.
2397 o Improvements on 0.0.9.x:
2398 - New experimental script tor/contrib/ExerciseServer.py (needs more
2399 work) that uses the controller interface to build circuits and
2400 fetch pages over them. This will help us bootstrap servers that
2401 have lots of capacity but haven't noticed it yet.
2402 - New experimental script tor/contrib/PathDemo.py (needs more work)
2403 that uses the controller interface to let you choose whole paths
2405 "<hostname>.<path,separated by dots>.<length of path>.path"
2406 - When we've connected to an OR and handshaked but didn't like
2407 the result, we were closing the conn without sending destroy
2408 cells back for pending circuits. Now send those destroys.
2411 Changes in version 0.0.9.7 - 2005-04-01
2412 o Bugfixes on 0.0.9.x:
2413 - Fix another race crash bug (thanks to Glenn Fink for reporting).
2414 - Compare identity to identity, not to nickname, when extending to
2415 a router not already in the directory. This was preventing us from
2416 extending to unknown routers. Oops.
2417 - Make sure to create OS X Tor user in <500 range, so we aren't
2418 creating actual system users.
2419 - Note where connection-that-hasn't-sent-end was marked, and fix
2420 a few really loud instances of this harmless bug (it's fixed more
2424 Changes in version 0.1.0.1-rc - 2005-03-28
2426 - Add reachability testing. Your Tor server will automatically try
2427 to see if its ORPort and DirPort are reachable from the outside,
2428 and it won't upload its descriptor until it decides they are.
2429 - Handle unavailable hidden services better. Handle slow or busy
2430 hidden services better.
2431 - Add support for CONNECTing through https proxies, with "HttpsProxy"
2433 - New exit policy: accept most low-numbered ports, rather than
2434 rejecting most low-numbered ports.
2435 - More Tor controller support (still experimental). See
2436 http://tor.eff.org/doc/control-spec.txt for all the new features,
2437 including signals to emulate unix signals from any platform;
2438 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
2439 closestream; closecircuit; etc.
2440 - Make nt services work and start on startup on win32 (based on
2441 patch by Matt Edman).
2442 - Add a new AddressMap config directive to rewrite incoming socks
2443 addresses. This lets you, for example, declare an implicit
2444 required exit node for certain sites.
2445 - Add a new TrackHostExits config directive to trigger addressmaps
2446 for certain incoming socks addresses -- for sites that break when
2447 your exit keeps changing (based on patch by Mike Perry).
2448 - Redo the client-side dns cache so it's just an addressmap too.
2449 - Notice when our IP changes, and reset stats/uptime/reachability.
2450 - When an application is using socks5, give him the whole variety of
2451 potential socks5 responses (connect refused, host unreachable, etc),
2452 rather than just "success" or "failure".
2453 - A more sane version numbering system. See
2454 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
2455 - New contributed script "exitlist": a simple python script to
2456 parse directories and find Tor nodes that exit to listed
2458 - New contributed script "privoxy-tor-toggle" to toggle whether
2459 Privoxy uses Tor. Seems to be configured for Debian by default.
2460 - Report HTTP reasons to client when getting a response from directory
2461 servers -- so you can actually know what went wrong.
2462 - New config option MaxAdvertisedBandwidth which lets you advertise
2463 a low bandwidthrate (to not attract as many circuits) while still
2464 allowing a higher bandwidthrate in reality.
2466 o Robustness/stability fixes:
2467 - Make Tor use Niels Provos's libevent instead of its current
2468 poll-but-sometimes-select mess. This will let us use faster async
2469 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
2471 - pthread support now too. This was forced because when we forked,
2472 we ended up wasting a lot of duplicate ram over time. Also switch
2473 to foo_r versions of some library calls to allow reentry and
2475 - Better handling for heterogeneous / unreliable nodes:
2476 - Annotate circuits w/ whether they aim to contain high uptime nodes
2477 and/or high capacity nodes. When building circuits, choose
2479 - This means that every single node in an intro rend circuit,
2480 not just the last one, will have a minimum uptime.
2481 - New config option LongLivedPorts to indicate application streams
2482 that will want high uptime circuits.
2483 - Servers reset uptime when a dir fetch entirely fails. This
2484 hopefully reflects stability of the server's network connectivity.
2485 - If somebody starts his tor server in Jan 2004 and then fixes his
2486 clock, don't make his published uptime be a year.
2487 - Reset published uptime when you wake up from hibernation.
2488 - Introduce a notion of 'internal' circs, which are chosen without
2489 regard to the exit policy of the last hop. Intro and rendezvous
2490 circs must be internal circs, to avoid leaking information. Resolve
2491 and connect streams can use internal circs if they want.
2492 - New circuit pooling algorithm: make sure to have enough circs around
2493 to satisfy any predicted ports, and also make sure to have 2 internal
2494 circs around if we've required internal circs lately (and with high
2495 uptime if we've seen that lately too).
2496 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
2497 which describes how often we retry making new circuits if current
2498 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
2499 how long we're willing to make use of an already-dirty circuit.
2500 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
2501 circ as necessary, if there are any completed ones lying around
2502 when we try to launch one.
2503 - Make hidden services try to establish a rendezvous for 30 seconds,
2504 rather than for n (where n=3) attempts to build a circuit.
2505 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
2506 "ShutdownWaitLength".
2507 - Try to be more zealous about calling connection_edge_end when
2508 things go bad with edge conns in connection.c.
2509 - Revise tor-spec to add more/better stream end reasons.
2510 - Revise all calls to connection_edge_end to avoid sending "misc",
2511 and to take errno into account where possible.
2514 - Fix a race condition that can trigger an assert, when we have a
2515 pending create cell and an OR connection fails right then.
2516 - Fix several double-mark-for-close bugs, e.g. where we were finding
2517 a conn for a cell even if that conn is already marked for close.
2518 - Make sequence of log messages when starting on win32 with no config
2519 file more reasonable.
2520 - When choosing an exit node for a new non-internal circ, don't take
2521 into account whether it'll be useful for any pending x.onion
2522 addresses -- it won't.
2523 - Turn addr_policy_compare from a tristate to a quadstate; this should
2524 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
2525 for google.com" problem.
2526 - Make "platform" string in descriptor more accurate for Win32 servers,
2527 so it's not just "unknown platform".
2528 - Fix an edge case in parsing config options (thanks weasel).
2529 If they say "--" on the commandline, it's not an option.
2530 - Reject odd-looking addresses at the client (e.g. addresses that
2531 contain a colon), rather than having the server drop them because
2533 - tor-resolve requests were ignoring .exit if there was a working circuit
2534 they could use instead.
2535 - REUSEADDR on normal platforms means you can rebind to the port
2536 right after somebody else has let it go. But REUSEADDR on win32
2537 means to let you bind to the port _even when somebody else
2538 already has it bound_! So, don't do that on Win32.
2539 - Change version parsing logic: a version is "obsolete" if it is not
2540 recommended and (1) there is a newer recommended version in the
2541 same series, or (2) there are no recommended versions in the same
2542 series, but there are some recommended versions in a newer series.
2543 A version is "new" if it is newer than any recommended version in
2545 - Stop most cases of hanging up on a socks connection without sending
2549 - Require BandwidthRate to be at least 20kB/s for servers.
2550 - When a dirserver causes you to give a warn, mention which dirserver
2552 - New config option DirAllowPrivateAddresses for authdirservers.
2553 Now by default they refuse router descriptors that have non-IP or
2554 private-IP addresses.
2555 - Stop publishing socksport in the directory, since it's not
2556 actually meant to be public. For compatibility, publish a 0 there
2558 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
2559 smart" value, that is low for servers and high for clients.
2560 - If our clock jumps forward by 100 seconds or more, assume something
2561 has gone wrong with our network and abandon all not-yet-used circs.
2562 - Warn when exit policy implicitly allows local addresses.
2563 - If we get an incredibly skewed timestamp from a dirserver mirror
2564 that isn't a verified OR, don't warn -- it's probably him that's
2566 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
2567 cookies to disk and doesn't log each web request to disk. (Thanks
2568 to Brett Carrington for pointing this out.)
2569 - When a client asks us for a dir mirror and we don't have one,
2570 launch an attempt to get a fresh one.
2571 - If we're hibernating and we get a SIGINT, exit immediately.
2572 - Add --with-dmalloc ./configure option, to track memory leaks.
2573 - And try to free all memory on closing, so we can detect what
2575 - Cache local dns resolves correctly even when they're .exit
2577 - Give a better warning when some other server advertises an
2578 ORPort that is actually an apache running ssl.
2579 - Add "opt hibernating 1" to server descriptor to make it clearer
2580 whether the server is hibernating.
2583 Changes in version 0.0.9.6 - 2005-03-24
2584 o Bugfixes on 0.0.9.x (crashes and asserts):
2585 - Add new end stream reasons to maintainance branch. Fix bug where
2586 reason (8) could trigger an assert. Prevent bug from recurring.
2587 - Apparently win32 stat wants paths to not end with a slash.
2588 - Fix assert triggers in assert_cpath_layer_ok(), where we were
2589 blowing away the circuit that conn->cpath_layer points to, then
2590 checking to see if the circ is well-formed. Backport check to make
2591 sure we dont use the cpath on a closed connection.
2592 - Prevent circuit_resume_edge_reading_helper() from trying to package
2593 inbufs for marked-for-close streams.
2594 - Don't crash on hup if your options->address has become unresolvable.
2595 - Some systems (like OS X) sometimes accept() a connection and tell
2596 you the remote host is 0.0.0.0:0. If this happens, due to some
2597 other mis-features, we get confused; so refuse the conn for now.
2599 o Bugfixes on 0.0.9.x (other):
2600 - Fix harmless but scary "Unrecognized content encoding" warn message.
2601 - Add new stream error reason: TORPROTOCOL reason means "you are not
2602 speaking a version of Tor I understand; say bye-bye to your stream."
2603 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
2604 into the future, now that we are more tolerant of skew. This
2605 resolves a bug where a Tor server would refuse to cache a directory
2606 because all the directories it gets are too far in the future;
2607 yet the Tor server never logs any complaints about clock skew.
2608 - Mac packaging magic: make man pages useable, and do not overwrite
2609 existing torrc files.
2610 - Make OS X log happily to /var/log/tor/tor.log
2613 Changes in version 0.0.9.5 - 2005-02-22
2614 o Bugfixes on 0.0.9.x:
2615 - Fix an assert race at exit nodes when resolve requests fail.
2616 - Stop picking unverified dir mirrors--it only leads to misery.
2617 - Patch from Matt Edman to make NT services work better. Service
2618 support is still not compiled into the executable by default.
2619 - Patch from Dmitri Bely so the Tor service runs better under
2620 the win32 SYSTEM account.
2621 - Make tor-resolve actually work (?) on Win32.
2622 - Fix a sign bug when getrlimit claims to have 4+ billion
2623 file descriptors available.
2624 - Stop refusing to start when bandwidthburst == bandwidthrate.
2625 - When create cells have been on the onion queue more than five
2626 seconds, just send back a destroy and take them off the list.
2629 Changes in version 0.0.9.4 - 2005-02-03
2630 o Bugfixes on 0.0.9:
2631 - Fix an assert bug that took down most of our servers: when
2632 a server claims to have 1 GB of bandwidthburst, don't
2634 - Don't crash as badly if we have spawned the max allowed number
2635 of dnsworkers, or we're out of file descriptors.
2636 - Block more file-sharing ports in the default exit policy.
2637 - MaxConn is now automatically set to the hard limit of max
2638 file descriptors we're allowed (ulimit -n), minus a few for
2640 - Give a clearer message when servers need to raise their
2641 ulimit -n when they start running out of file descriptors.
2642 - SGI Compatibility patches from Jan Schaumann.
2643 - Tolerate a corrupt cached directory better.
2644 - When a dirserver hasn't approved your server, list which one.
2645 - Go into soft hibernation after 95% of the bandwidth is used,
2646 not 99%. This is especially important for daily hibernators who
2647 have a small accounting max. Hopefully it will result in fewer
2648 cut connections when the hard hibernation starts.
2649 - Load-balance better when using servers that claim more than
2650 800kB/s of capacity.
2651 - Make NT services work (experimental, only used if compiled in).
2654 Changes in version 0.0.9.3 - 2005-01-21
2655 o Bugfixes on 0.0.9:
2656 - Backport the cpu use fixes from main branch, so busy servers won't
2657 need as much processor time.
2658 - Work better when we go offline and then come back, or when we
2659 run Tor at boot before the network is up. We do this by
2660 optimistically trying to fetch a new directory whenever an
2661 application request comes in and we think we're offline -- the
2662 human is hopefully a good measure of when the network is back.
2663 - Backport some minimal hidserv bugfixes: keep rend circuits open as
2664 long as you keep using them; actually publish hidserv descriptors
2665 shortly after they change, rather than waiting 20-40 minutes.
2666 - Enable Mac startup script by default.
2667 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
2668 - When you update AllowUnverifiedNodes or FirewallPorts via the
2669 controller's setconf feature, we were always appending, never
2671 - When you update HiddenServiceDir via setconf, it was screwing up
2672 the order of reading the lines, making it fail.
2673 - Do not rewrite a cached directory back to the cache; otherwise we
2674 will think it is recent and not fetch a newer one on startup.
2675 - Workaround for webservers that lie about Content-Encoding: Tor
2676 now tries to autodetect compressed directories and compression
2677 itself. This lets us Proxypass dir fetches through apache.
2680 Changes in version 0.0.9.2 - 2005-01-04
2681 o Bugfixes on 0.0.9 (crashes and asserts):
2682 - Fix an assert on startup when the disk is full and you're logging
2684 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
2685 style address, then we'd crash.
2686 - Fix an assert trigger when the running-routers string we get from
2687 a dirserver is broken.
2688 - Make worker threads start and run on win32. Now win32 servers
2690 - Bandaid (not actually fix, but now it doesn't crash) an assert
2691 where the dns worker dies mysteriously and the main Tor process
2692 doesn't remember anything about the address it was resolving.
2694 o Bugfixes on 0.0.9 (Win32):
2695 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
2696 name out of the warning/assert messages.
2697 - Fix a superficial "unhandled error on read" bug on win32.
2698 - The win32 installer no longer requires a click-through for our
2699 license, since our Free Software license grants rights but does not
2701 - Win32: When connecting to a dirserver fails, try another one
2702 immediately. (This was already working for non-win32 Tors.)
2703 - Stop trying to parse $HOME on win32 when hunting for default
2705 - Make tor-resolve.c work on win32 by calling network_init().
2707 o Bugfixes on 0.0.9 (other):
2708 - Make 0.0.9.x build on Solaris again.
2709 - Due to a fencepost error, we were blowing away the \n when reporting
2710 confvalue items in the controller. So asking for multiple config
2711 values at once couldn't work.
2712 - When listing circuits that are pending on an opening OR connection,
2713 if we're an OR we were listing circuits that *end* at us as
2714 being pending on every listener, dns/cpu worker, etc. Stop that.
2715 - Dirservers were failing to create 'running-routers' or 'directory'
2716 strings if we had more than some threshold of routers. Fix them so
2717 they can handle any number of routers.
2718 - Fix a superficial "Duplicate mark for close" bug.
2719 - Stop checking for clock skew for OR connections, even for servers.
2720 - Fix a fencepost error that was chopping off the last letter of any
2721 nickname that is the maximum allowed nickname length.
2722 - Update URLs in log messages so they point to the new website.
2723 - Fix a potential problem in mangling server private keys while
2724 writing to disk (not triggered yet, as far as we know).
2725 - Include the licenses for other free software we include in Tor,
2726 now that we're shipping binary distributions more regularly.
2729 Changes in version 0.0.9.1 - 2004-12-15
2730 o Bugfixes on 0.0.9:
2731 - Make hibernation actually work.
2732 - Make HashedControlPassword config option work.
2733 - When we're reporting event circuit status to a controller,
2734 don't use the stream status code.
2737 Changes in version 0.0.9 - 2004-12-12
2739 - Clean up manpage and torrc.sample file.
2740 - Clean up severities and text of log warnings.
2742 - Make servers trigger an assert when they enter hibernation.
2745 Changes in version 0.0.9rc7 - 2004-12-08
2746 o Bugfixes on 0.0.9rc:
2747 - Fix a stack-trashing crash when an exit node begins hibernating.
2748 - Avoid looking at unallocated memory while considering which
2749 ports we need to build circuits to cover.
2750 - Stop a sigpipe: when an 'end' cell races with eof from the app,
2751 we shouldn't hold-open-until-flush if the eof arrived first.
2752 - Fix a bug with init_cookie_authentication() in the controller.
2753 - When recommending new-format log lines, if the upper bound is
2754 LOG_ERR, leave it implicit.
2756 o Bugfixes on 0.0.8.1:
2757 - Fix a whole slew of memory leaks.
2758 - Fix isspace() and friends so they still make Solaris happy
2759 but also so they don't trigger asserts on win32.
2760 - Fix parse_iso_time on platforms without strptime (eg win32).
2761 - win32: tolerate extra "readable" events better.
2762 - win32: when being multithreaded, leave parent fdarray open.
2763 - Make unit tests work on win32.
2766 Changes in version 0.0.9rc6 - 2004-12-06
2767 o Bugfixes on 0.0.9pre:
2768 - Clean up some more integer underflow opportunities (not exploitable
2770 - While hibernating, hup should not regrow our listeners.
2771 - Send an end to the streams we close when we hibernate, rather
2772 than just chopping them off.
2773 - React to eof immediately on non-open edge connections.
2775 o Bugfixes on 0.0.8.1:
2776 - Calculate timeout for waiting for a connected cell from the time
2777 we sent the begin cell, not from the time the stream started. If
2778 it took a long time to establish the circuit, we would time out
2779 right after sending the begin cell.
2780 - Fix router_compare_addr_to_addr_policy: it was not treating a port
2781 of * as always matching, so we were picking reject *:* nodes as
2782 exit nodes too. Oops.
2785 - New circuit building strategy: keep a list of ports that we've
2786 used in the past 6 hours, and always try to have 2 circuits open
2787 or on the way that will handle each such port. Seed us with port
2788 80 so web users won't complain that Tor is "slow to start up".
2789 - Make kill -USR1 dump more useful stats about circuits.
2790 - When warning about retrying or giving up, print the address, so
2791 the user knows which one it's talking about.
2792 - If you haven't used a clean circuit in an hour, throw it away,
2793 just to be on the safe side. (This means after 6 hours a totally
2794 unused Tor client will have no circuits open.)
2797 Changes in version 0.0.9rc5 - 2004-12-01
2798 o Bugfixes on 0.0.8.1:
2799 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
2800 - Let resolve conns retry/expire also, rather than sticking around
2802 - If we are using select, make sure we stay within FD_SETSIZE.
2804 o Bugfixes on 0.0.9pre:
2805 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
2806 but doesn't seem to be currently; thanks to Ilja van Sprundel for
2808 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
2809 instead. Impose minima and maxima for all *Period options; impose
2810 even tighter maxima for fetching if we are a caching dirserver.
2811 Clip rather than rejecting.
2812 - Fetch cached running-routers from servers that serve it (that is,
2813 authdirservers and servers running 0.0.9rc5-cvs or later.)
2816 - Accept *:706 (silc) in default exit policy.
2817 - Implement new versioning format for post 0.1.
2818 - Support "foo.nickname.exit" addresses, to let Alice request the
2819 address "foo" as viewed by exit node "nickname". Based on a patch
2821 - Make tor --version --version dump the cvs Id of every file.
2824 Changes in version 0.0.9rc4 - 2004-11-28
2825 o Bugfixes on 0.0.8.1:
2826 - Make windows sockets actually non-blocking (oops), and handle
2827 win32 socket errors better.
2829 o Bugfixes on 0.0.9rc1:
2830 - Actually catch the -USR2 signal.
2833 Changes in version 0.0.9rc3 - 2004-11-25
2834 o Bugfixes on 0.0.8.1:
2835 - Flush the log file descriptor after we print "Tor opening log file",
2836 so we don't see those messages days later.
2838 o Bugfixes on 0.0.9rc1:
2839 - Make tor-resolve work again.
2840 - Avoid infinite loop in tor-resolve if tor hangs up on it.
2841 - Fix an assert trigger for clients/servers handling resolves.
2844 Changes in version 0.0.9rc2 - 2004-11-24
2845 o Bugfixes on 0.0.9rc1:
2846 - I broke socks5 support while fixing the eof bug.
2847 - Allow unitless bandwidths and intervals; they default to bytes
2849 - New servers don't start out hibernating; they are active until
2850 they run out of bytes, so they have a better estimate of how
2851 long it takes, and so their operators can know they're working.
2854 Changes in version 0.0.9rc1 - 2004-11-23
2855 o Bugfixes on 0.0.8.1:
2856 - Finally fix a bug that's been plaguing us for a year:
2857 With high load, circuit package window was reaching 0. Whenever
2858 we got a circuit-level sendme, we were reading a lot on each
2859 socket, but only writing out a bit. So we would eventually reach
2860 eof. This would be noticed and acted on even when there were still
2861 bytes sitting in the inbuf.
2862 - When poll() is interrupted, we shouldn't believe the revents values.
2864 o Bugfixes on 0.0.9pre6:
2865 - Fix hibernate bug that caused pre6 to be broken.
2866 - Don't keep rephist info for routers that haven't had activity for
2867 24 hours. (This matters now that clients have keys, since we track
2869 - Never call close_temp_logs while validating log options.
2870 - Fix backslash-escaping on tor.sh.in and torctl.in.
2873 - Implement weekly/monthly/daily accounting: now you specify your
2874 hibernation properties by
2875 AccountingMax N bytes|KB|MB|GB|TB
2876 AccountingStart day|week|month [day] HH:MM
2877 Defaults to "month 1 0:00".
2878 - Let bandwidth and interval config options be specified as 5 bytes,
2879 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
2880 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
2881 get back to normal.)
2882 - If your requested entry or exit node has advertised bandwidth 0,
2884 - Be more greedy about filling up relay cells -- we try reading again
2885 once we've processed the stuff we read, in case enough has arrived
2886 to fill the last cell completely.
2887 - Apply NT service patch from Osamu Fujino. Still needs more work.
2890 Changes in version 0.0.9pre6 - 2004-11-15
2891 o Bugfixes on 0.0.8.1:
2892 - Fix assert failure on malformed socks4a requests.
2893 - Use identity comparison, not nickname comparison, to choose which
2894 half of circuit-ID-space each side gets to use. This is needed
2895 because sometimes we think of a router as a nickname, and sometimes
2896 as a hex ID, and we can't predict what the other side will do.
2897 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
2898 write() call will fail and we handle it there.
2899 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
2900 and smartlist_len, which are two major profiling offenders.
2902 o Bugfixes on 0.0.9pre5:
2903 - Fix a bug in read_all that was corrupting config files on windows.
2904 - When we're raising the max number of open file descriptors to
2905 'unlimited', don't log that we just raised it to '-1'.
2906 - Include event code with events, as required by control-spec.txt.
2907 - Don't give a fingerprint when clients do --list-fingerprint:
2908 it's misleading, because it will never be the same again.
2909 - Stop using strlcpy in tor_strndup, since it was slowing us
2911 - Remove warn on startup about missing cached-directory file.
2912 - Make kill -USR1 work again.
2913 - Hibernate if we start tor during the "wait for wakeup-time" phase
2914 of an accounting interval. Log our hibernation plans better.
2915 - Authoritative dirservers now also cache their directory, so they
2916 have it on start-up.
2919 - Fetch running-routers; cache running-routers; compress
2920 running-routers; serve compressed running-routers.z
2921 - Add NSI installer script contributed by J Doe.
2922 - Commit VC6 and VC7 workspace/project files.
2923 - Commit a tor.spec for making RPM files, with help from jbash.
2924 - Add contrib/torctl.in contributed by Glenn Fink.
2925 - Implement the control-spec's SAVECONF command, to write your
2926 configuration to torrc.
2927 - Get cookie authentication for the controller closer to working.
2928 - Include control-spec.txt in the tarball.
2929 - When set_conf changes our server descriptor, upload a new copy.
2930 But don't upload it too often if there are frequent changes.
2931 - Document authentication config in man page, and document signals
2933 - Clean up confusing parts of man page and torrc.sample.
2934 - Make expand_filename handle ~ and ~username.
2935 - Use autoconf to enable largefile support where necessary. Use
2936 ftello where available, since ftell can fail at 2GB.
2937 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
2938 log more informatively.
2939 - Give a slightly more useful output for "tor -h".
2940 - Refuse application socks connections to port 0.
2941 - Check clock skew for verified servers, but allow unverified
2942 servers and clients to have any clock skew.
2943 - Break DirFetchPostPeriod into:
2944 - DirFetchPeriod for fetching full directory,
2945 - StatusFetchPeriod for fetching running-routers,
2946 - DirPostPeriod for posting server descriptor,
2947 - RendPostPeriod for posting hidden service descriptors.
2948 - Make sure the hidden service descriptors are at a random offset
2949 from each other, to hinder linkability.
2952 Changes in version 0.0.9pre5 - 2004-11-09
2953 o Bugfixes on 0.0.9pre4:
2954 - Fix a seg fault in unit tests (doesn't affect main program).
2955 - Fix an assert bug where a hidden service provider would fail if
2956 the first hop of his rendezvous circuit was down.
2957 - Hidden service operators now correctly handle version 1 style
2958 INTRODUCE1 cells (nobody generates them still, so not a critical
2960 - If do_hup fails, actually notice.
2961 - Handle more errnos from accept() without closing the listener.
2962 Some OpenBSD machines were closing their listeners because
2963 they ran out of file descriptors.
2964 - Send resolve cells to exit routers that are running a new
2965 enough version of the resolve code to work right.
2966 - Better handling of winsock includes on non-MSV win32 compilers.
2967 - Some people had wrapped their tor client/server in a script
2968 that would restart it whenever it died. This did not play well
2969 with our "shut down if your version is obsolete" code. Now people
2970 don't fetch a new directory if their local cached version is
2972 - Make our autogen.sh work on ksh as well as bash.
2975 - Hibernation: New config option "AccountingMaxKB" lets you
2976 set how many KBytes per month you want to allow your server to
2977 consume. Rather than spreading those bytes out evenly over the
2978 month, we instead hibernate for some of the month and pop up
2979 at a deterministic time, work until the bytes are consumed, then
2980 hibernate again. Config option "MonthlyAccountingStart" lets you
2981 specify which day of the month your billing cycle starts on.
2982 - Control interface: a separate program can now talk to your
2983 client/server over a socket, and get/set config options, receive
2984 notifications of circuits and streams starting/finishing/dying,
2985 bandwidth used, etc. The next step is to get some GUIs working.
2986 Let us know if you want to help out. See doc/control-spec.txt .
2987 - Ship a contrib/tor-control.py as an example script to interact
2988 with the control port.
2989 - "tor --hash-password zzyxz" will output a salted password for
2990 use in authenticating to the control interface.
2991 - New log format in config:
2992 "Log minsev[-maxsev] stdout|stderr|syslog" or
2993 "Log minsev[-maxsev] file /var/foo"
2996 - DirPolicy config option, to let people reject incoming addresses
2997 from their dirserver.
2998 - "tor --list-fingerprint" will list your identity key fingerprint
3000 - Add "pass" target for RedirectExit, to make it easier to break
3001 out of a sequence of RedirectExit rules.
3002 - Clients now generate a TLS cert too, in preparation for having
3003 them act more like real nodes.
3004 - Ship src/win32/ in the tarball, so people can use it to build.
3005 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
3007 - New "router-status" line in directory, to better bind each verified
3008 nickname to its identity key.
3009 - Deprecate unofficial config option abbreviations, and abbreviations
3010 not on the command line.
3011 - Add a pure-C tor-resolve implementation.
3012 - Use getrlimit and friends to ensure we can reach MaxConn (currently
3013 1024) file descriptors.
3015 o Code security improvements, inspired by Ilja:
3016 - Replace sprintf with snprintf. (I think they were all safe, but
3018 - Replace strcpy/strncpy with strlcpy in more places.
3019 - Avoid strcat; use snprintf or strlcat instead.
3020 - snprintf wrapper with consistent (though not C99) overflow behavior.
3023 Changes in version 0.0.9pre4 - 2004-10-17
3024 o Bugfixes on 0.0.9pre3:
3025 - If the server doesn't specify an exit policy, use the real default
3026 exit policy, not reject *:*.
3027 - Ignore fascistfirewall when uploading/downloading hidden service
3028 descriptors, since we go through Tor for those; and when using
3029 an HttpProxy, since we assume it can reach them all.
3030 - When looking for an authoritative dirserver, use only the ones
3031 configured at boot. Don't bother looking in the directory.
3032 - The rest of the fix for get_default_conf_file() on older win32.
3033 - Make 'Routerfile' config option obsolete.
3036 - New 'MyFamily nick1,...' config option for a server to
3037 specify other servers that shouldn't be used in the same circuit
3038 with it. Only believed if nick1 also specifies us.
3039 - New 'NodeFamily nick1,nick2,...' config option for a client to
3040 specify nodes that it doesn't want to use in the same circuit.
3041 - New 'Redirectexit pattern address:port' config option for a
3042 server to redirect exit connections, e.g. to a local squid.
3045 Changes in version 0.0.9pre3 - 2004-10-13
3046 o Bugfixes on 0.0.8.1:
3047 - Better torrc example lines for dirbindaddress and orbindaddress.
3048 - Improved bounds checking on parsed ints (e.g. config options and
3049 the ones we find in directories.)
3050 - Better handling of size_t vs int, so we're more robust on 64
3052 - Fix the rest of the bug where a newly started OR would appear
3053 as unverified even after we've added his fingerprint and hupped
3055 - Fix a bug from 0.0.7: when read() failed on a stream, we would
3056 close it without sending back an end. So 'connection refused'
3057 would simply be ignored and the user would get no response.
3059 o Bugfixes on 0.0.9pre2:
3060 - Serving the cached-on-disk directory to people is bad. We now
3061 provide no directory until we've fetched a fresh one.
3062 - Workaround for bug on windows where cached-directories get crlf
3064 - Make get_default_conf_file() work on older windows too.
3065 - If we write a *:* exit policy line in the descriptor, don't write
3066 any more exit policy lines.
3069 - Use only 0.0.9pre1 and later servers for resolve cells.
3070 - Make the dirservers file obsolete.
3071 - Include a dir-signing-key token in directories to tell the
3072 parsing entity which key is being used to sign.
3073 - Remove the built-in bulky default dirservers string.
3074 - New config option "Dirserver %s:%d [fingerprint]", which can be
3075 repeated as many times as needed. If no dirservers specified,
3076 default to moria1,moria2,tor26.
3077 - Make moria2 advertise a dirport of 80, so people behind firewalls
3078 will be able to get a directory.
3079 - Http proxy support
3080 - Dirservers translate requests for http://%s:%d/x to /x
3081 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
3082 be routed through this host.
3083 - Clients ask for /tor/x rather than /x for new enough dirservers.
3084 This way we can one day coexist peacefully with apache.
3085 - Clients specify a "Host: %s%d" http header, to be compatible
3086 with more proxies, and so running squid on an exit node can work.
3089 Changes in version 0.0.8.1 - 2004-10-13
3091 - Fix a seg fault that can be triggered remotely for Tor
3092 clients/servers with an open dirport.
3093 - Fix a rare assert trigger, where routerinfos for entries in
3094 our cpath would expire while we're building the path.
3095 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3096 - Fix a rare seg fault for people running hidden services on
3097 intermittent connections.
3098 - Fix a bug in parsing opt keywords with objects.
3099 - Fix a stale pointer assert bug when a stream detaches and
3101 - Fix a string format vulnerability (probably not exploitable)
3102 in reporting stats locally.
3103 - Fix an assert trigger: sometimes launching circuits can fail
3104 immediately, e.g. because too many circuits have failed recently.
3105 - Fix a compile warning on 64 bit platforms.
3108 Changes in version 0.0.9pre2 - 2004-10-03
3110 - Make fetching a cached directory work for 64-bit platforms too.
3111 - Make zlib.h a required header, not an optional header.
3114 Changes in version 0.0.9pre1 - 2004-10-01
3116 - Stop using separate defaults for no-config-file and
3117 empty-config-file. Now you have to explicitly turn off SocksPort,
3118 if you don't want it open.
3119 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3120 - Improve man page to mention more of the 0.0.8 features.
3121 - Fix a rare seg fault for people running hidden services on
3122 intermittent connections.
3123 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
3125 - Fix more dns related bugs: send back resolve_failed and end cells
3126 more reliably when the resolve fails, rather than closing the
3127 circuit and then trying to send the cell. Also attach dummy resolve
3128 connections to a circuit *before* calling dns_resolve(), to fix
3129 a bug where cached answers would never be sent in RESOLVED cells.
3130 - When we run out of disk space, or other log writing error, don't
3131 crash. Just stop logging to that log and continue.
3132 - We were starting to daemonize before we opened our logs, so if
3133 there were any problems opening logs, we would complain to stderr,
3134 which wouldn't work, and then mysteriously exit.
3135 - Fix a rare bug where sometimes a verified OR would connect to us
3136 before he'd uploaded his descriptor, which would cause us to
3137 assign conn->nickname as though he's unverified. Now we look through
3138 the fingerprint list to see if he's there.
3139 - Fix a rare assert trigger, where routerinfos for entries in
3140 our cpath would expire while we're building the path.
3143 - Clients can ask dirservers for /dir.z to get a compressed version
3144 of the directory. Only works for servers running 0.0.9, of course.
3145 - Make clients cache directories and use them to seed their router
3146 lists at startup. This means clients have a datadir again.
3147 - Configuration infrastructure support for warning on obsolete
3149 - Respond to content-encoding headers by trying to uncompress as
3151 - Reply with a deflated directory when a client asks for "dir.z".
3152 We could use allow-encodings instead, but allow-encodings isn't
3153 specified in HTTP 1.0.
3154 - Raise the max dns workers from 50 to 100.
3155 - Discourage people from setting their dirfetchpostperiod more often
3156 than once per minute.
3157 - Protect dirservers from overzealous descriptor uploading -- wait
3158 10 seconds after directory gets dirty, before regenerating.
3161 Changes in version 0.0.8 - 2004-08-25
3162 o Port it to SunOS 5.9 / Athena
3165 Changes in version 0.0.8rc2 - 2004-08-20
3166 o Make it compile on cygwin again.
3167 o When picking unverified routers, skip those with low uptime and/or
3168 low bandwidth, depending on what properties you care about.
3171 Changes in version 0.0.8rc1 - 2004-08-18
3172 o Changes from 0.0.7.3:
3174 - Fix assert triggers: if the other side returns an address 0.0.0.0,
3175 don't put it into the client dns cache.
3176 - If a begin failed due to exit policy, but we believe the IP address
3177 should have been allowed, switch that router to exitpolicy reject *:*
3178 until we get our next directory.
3180 - Clients choose nodes proportional to advertised bandwidth.
3181 - Avoid using nodes with low uptime as introduction points.
3182 - Handle servers with dynamic IP addresses: don't replace
3183 options->Address with the resolved one at startup, and
3184 detect our address right before we make a routerinfo each time.
3185 - 'FascistFirewall' option to pick dirservers and ORs on specific
3186 ports; plus 'FirewallPorts' config option to tell FascistFirewall
3187 which ports are open. (Defaults to 80,443)
3188 - Be more aggressive about trying to make circuits when the network
3189 has changed (e.g. when you unsuspend your laptop).
3190 - Check for time skew on http headers; report date in response to
3192 - If the entrynode config line has only one node, don't pick it as
3194 - Add strict{entry|exit}nodes config options. If set to 1, then
3195 we refuse to build circuits that don't include the specified entry
3197 - OutboundBindAddress config option, to bind to a specific
3198 IP address for outgoing connect()s.
3199 - End truncated log entries (e.g. directories) with "[truncated]".
3201 o Patches to 0.0.8preX:
3203 - Patches to compile and run on win32 again (maybe)?
3204 - Fix crash when looking for ~/.torrc with no $HOME set.
3205 - Fix a race bug in the unit tests.
3206 - Handle verified/unverified name collisions better when new
3207 routerinfo's arrive in a directory.
3208 - Sometimes routers were getting entered into the stats before
3209 we'd assigned their identity_digest. Oops.
3210 - Only pick and establish intro points after we've gotten a
3213 - AllowUnverifiedNodes config option to let circuits choose no-name
3214 routers in entry,middle,exit,introduction,rendezvous positions.
3215 Allow middle and rendezvous positions by default.
3216 - Add a man page for tor-resolve.
3219 Changes in version 0.0.7.3 - 2004-08-12
3220 o Stop dnsworkers from triggering an assert failure when you
3221 ask them to resolve the host "".
3224 Changes in version 0.0.8pre3 - 2004-08-09
3225 o Changes from 0.0.7.2:
3226 - Allow multiple ORs with same nickname in routerlist -- now when
3227 people give us one identity key for a nickname, then later
3228 another, we don't constantly complain until the first expires.
3229 - Remember used bandwidth (both in and out), and publish 15-minute
3230 snapshots for the past day into our descriptor.
3231 - You can now fetch $DIRURL/running-routers to get just the
3232 running-routers line, not the whole descriptor list. (But
3233 clients don't use this yet.)
3234 - When people mistakenly use Tor as an http proxy, point them
3235 at the tor-doc.html rather than the INSTALL.
3236 - Remove our mostly unused -- and broken -- hex_encode()
3237 function. Use base16_encode() instead. (Thanks to Timo Lindfors
3238 for pointing out this bug.)
3239 - Rotate onion keys every 12 hours, not every 2 hours, so we have
3240 fewer problems with people using the wrong key.
3241 - Change the default exit policy to reject the default edonkey,
3242 kazaa, gnutella ports.
3243 - Add replace_file() to util.[ch] to handle win32's rename().
3245 o Changes from 0.0.8preX:
3246 - Fix two bugs in saving onion keys to disk when rotating, so
3247 hopefully we'll get fewer people using old onion keys.
3248 - Fix an assert error that was making SocksPolicy not work.
3249 - Be willing to expire routers that have an open dirport -- it's
3250 just the authoritative dirservers we want to not forget.
3251 - Reject tor-resolve requests for .onion addresses early, so we
3252 don't build a whole rendezvous circuit and then fail.
3253 - When you're warning a server that he's unverified, don't cry
3255 - Fix a race condition: don't try to extend onto a connection
3256 that's still handshaking.
3257 - For servers in clique mode, require the conn to be open before
3258 you'll choose it for your path.
3259 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
3260 end relay cell, etc.
3261 - Measure bandwidth capacity over the last 24 hours, not just 12
3262 - Bugfix: authoritative dirservers were making and signing a new
3263 directory for each client, rather than reusing the cached one.
3266 Changes in version 0.0.8pre2 - 2004-08-04
3267 o Changes from 0.0.7.2:
3269 - Check directory signature _before_ you decide whether you're
3270 you're running an obsolete version and should exit.
3271 - Check directory signature _before_ you parse the running-routers
3272 list to decide who's running or verified.
3273 - Bugfixes and features:
3274 - Check return value of fclose while writing to disk, so we don't
3275 end up with broken files when servers run out of disk space.
3276 - Log a warning if the user uses an unsafe socks variant, so people
3277 are more likely to learn about privoxy or socat.
3278 - Dirservers now include RFC1123-style dates in the HTTP headers,
3279 which one day we will use to better detect clock skew.
3281 o Changes from 0.0.8pre1:
3282 - Make it compile without warnings again on win32.
3283 - Log a warning if you're running an unverified server, to let you
3284 know you might want to get it verified.
3285 - Only pick a default nickname if you plan to be a server.
3288 Changes in version 0.0.8pre1 - 2004-07-23
3290 - Made our unit tests compile again on OpenBSD 3.5, and tor
3291 itself compile again on OpenBSD on a sparc64.
3292 - We were neglecting milliseconds when logging on win32, so
3293 everything appeared to happen at the beginning of each second.
3296 - 'Extend' relay cell payloads now include the digest of the
3297 intended next hop's identity key. Now we can verify that we're
3298 extending to the right router, and also extend to routers we
3299 hadn't heard of before.
3302 - Tor nodes can now act as relays (with an advertised ORPort)
3303 without being manually verified by the dirserver operators.
3304 - Uploaded descriptors of unverified routers are now accepted
3305 by the dirservers, and included in the directory.
3306 - Verified routers are listed by nickname in the running-routers
3307 list; unverified routers are listed as "$<fingerprint>".
3308 - We now use hash-of-identity-key in most places rather than
3309 nickname or addr:port, for improved security/flexibility.
3310 - To avoid Sybil attacks, paths still use only verified servers.
3311 But now we have a chance to play around with hybrid approaches.
3312 - Nodes track bandwidth usage to estimate capacity (not used yet).
3313 - ClientOnly option for nodes that never want to become servers.
3314 - Directory caching.
3315 - "AuthoritativeDir 1" option for the official dirservers.
3316 - Now other nodes (clients and servers) will cache the latest
3317 directory they've pulled down.
3318 - They can enable their DirPort to serve it to others.
3319 - Clients will pull down a directory from any node with an open
3320 DirPort, and check the signature/timestamp correctly.
3321 - Authoritative dirservers now fetch directories from other
3322 authdirservers, to stay better synced.
3323 - Running-routers list tells who's down also, along with noting
3324 if they're verified (listed by nickname) or unverified (listed
3326 - Allow dirservers to serve running-router list separately.
3327 This isn't used yet.
3328 - ORs connect-on-demand to other ORs
3329 - If you get an extend cell to an OR you're not connected to,
3330 connect, handshake, and forward the create cell.
3331 - The authoritative dirservers stay connected to everybody,
3332 and everybody stays connected to 0.0.7 servers, but otherwise
3333 clients/servers expire unused connections after 5 minutes.
3334 - When servers get a sigint, they delay 30 seconds (refusing new
3335 connections) then exit. A second sigint causes immediate exit.
3336 - File and name management:
3337 - Look for .torrc if no CONFDIR "torrc" is found.
3338 - If no datadir is defined, then choose, make, and secure ~/.tor
3340 - If torrc not found, exitpolicy reject *:*.
3341 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
3342 - If no nickname is defined, derive default from hostname.
3343 - Rename secret key files, e.g. identity.key -> secret_id_key,
3344 to discourage people from mailing their identity key to tor-ops.
3345 - Refuse to build a circuit before the directory has arrived --
3346 it won't work anyway, since you won't know the right onion keys
3348 - Try other dirservers immediately if the one you try is down. This
3349 should tolerate down dirservers better now.
3350 - Parse tor version numbers so we can do an is-newer-than check
3351 rather than an is-in-the-list check.
3352 - New socks command 'resolve', to let us shim gethostbyname()
3354 - A 'tor_resolve' script to access the socks resolve functionality.
3355 - A new socks-extensions.txt doc file to describe our
3356 interpretation and extensions to the socks protocols.
3357 - Add a ContactInfo option, which gets published in descriptor.
3358 - Publish OR uptime in descriptor (and thus in directory) too.
3359 - Write tor version at the top of each log file
3360 - New docs in the tarball:
3362 - Document that you should proxy your SSL traffic too.
3365 Changes in version 0.0.7.2 - 2004-07-07
3366 o A better fix for the 0.0.0.0 problem, that will hopefully
3367 eliminate the remaining related assertion failures.
3370 Changes in version 0.0.7.1 - 2004-07-04
3371 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
3372 since internally we use 0.0.0.0 to signify "not yet resolved".
3375 Changes in version 0.0.7 - 2004-06-07
3376 o Updated the man page to reflect the new features.
3379 Changes in version 0.0.7rc2 - 2004-06-06
3380 o Changes from 0.0.7rc1:
3381 - Make it build on Win32 again.
3382 o Changes from 0.0.6.2:
3383 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
3387 Changes in version 0.0.7rc1 - 2004-06-02
3389 - On sighup, we were adding another log without removing the first
3390 one. So log messages would get duplicated n times for n sighups.
3391 - Several cases of using a connection after we'd freed it. The
3392 problem was that connections that are pending resolve are in both
3393 the pending_resolve tree, and also the circuit's resolving_streams
3394 list. When you want to remove one, you must remove it from both.
3395 - Fix a double-mark-for-close where an end cell arrived for a
3396 resolving stream, and then the resolve failed.
3397 - Check directory signatures based on name of signer, not on whom
3398 we got the directory from. This will let us cache directories more
3401 - Crank up some of our constants to handle more users.
3404 Changes in version 0.0.7pre1 - 2004-06-02
3405 o Fixes for crashes and other obnoxious bugs:
3406 - Fix an epipe bug: sometimes when directory connections failed
3407 to connect, we would give them a chance to flush before closing
3409 - When we detached from a circuit because of resolvefailed, we
3410 would immediately try the same circuit twice more, and then
3411 give up on the resolve thinking we'd tried three different
3413 - Limit the number of intro circuits we'll attempt to build for a
3414 hidden service per 15-minute period.
3415 - Check recommended-software string *early*, before actually parsing
3416 the directory. Thus we can detect an obsolete version and exit,
3417 even if the new directory format doesn't parse.
3418 o Fixes for security bugs:
3419 - Remember which nodes are dirservers when you startup, and if a
3420 random OR enables his dirport, don't automatically assume he's
3421 a trusted dirserver.
3423 - Directory connections were asking the wrong poll socket to
3424 start writing, and not asking themselves to start writing.
3425 - When we detached from a circuit because we sent a begin but
3426 didn't get a connected, we would use it again the first time;
3427 but after that we would correctly switch to a different one.
3428 - Stop warning when the first onion decrypt attempt fails; they
3429 will sometimes legitimately fail now that we rotate keys.
3430 - Override unaligned-access-ok check when $host_cpu is ia64 or
3431 arm. Apparently they allow it but the kernel whines.
3432 - Dirservers try to reconnect periodically too, in case connections
3434 - Fix some memory leaks in directory servers.
3435 - Allow backslash in Win32 filenames.
3436 - Made Tor build complain-free on FreeBSD, hopefully without
3437 breaking other BSD builds. We'll see.
3439 - Doxygen markup on all functions and global variables.
3440 - Make directory functions update routerlist, not replace it. So
3441 now directory disagreements are not so critical a problem.
3442 - Remove the upper limit on number of descriptors in a dirserver's
3443 directory (not that we were anywhere close).
3444 - Allow multiple logfiles at different severity ranges.
3445 - Allow *BindAddress to specify ":port" rather than setting *Port
3446 separately. Allow multiple instances of each BindAddress config
3447 option, so you can bind to multiple interfaces if you want.
3448 - Allow multiple exit policy lines, which are processed in order.
3449 Now we don't need that huge line with all the commas in it.
3450 - Enable accept/reject policies on SOCKS connections, so you can bind
3451 to 0.0.0.0 but still control who can use your OP.
3454 Changes in version 0.0.6.2 - 2004-05-16
3455 o Our integrity-checking digest was checking only the most recent cell,
3456 not the previous cells like we'd thought.
3457 Thanks to Stefan Mark for finding the flaw!
3460 Changes in version 0.0.6.1 - 2004-05-06
3461 o Fix two bugs in our AES counter-mode implementation (this affected
3462 onion-level stream encryption, but not TLS-level). It turns
3463 out we were doing something much more akin to a 16-character
3464 polyalphabetic cipher. Oops.
3465 Thanks to Stefan Mark for finding the flaw!
3466 o Retire moria3 as a directory server, and add tor26 as a directory
3470 Changes in version 0.0.6 - 2004-05-02
3474 Changes in version 0.0.6rc4 - 2004-05-01
3475 o Update the built-in dirservers list to use the new directory format
3476 o Fix a rare seg fault: if a node offering a hidden service attempts
3477 to build a circuit to Alice's rendezvous point and fails before it
3478 reaches the last hop, it retries with a different circuit, but
3480 o Handle windows socket errors correctly.
3483 Changes in version 0.0.6rc3 - 2004-04-28
3484 o Don't expire non-general excess circuits (if we had enough
3485 circuits open, we were expiring rendezvous circuits -- even
3486 when they had a stream attached. oops.)
3487 o Fetch randomness from /dev/urandom better (not via fopen/fread)
3488 o Better debugging for tls errors
3489 o Some versions of openssl have an SSL_pending function that erroneously
3490 returns bytes when there is a non-application record pending.
3491 o Set Content-Type on the directory and hidserv descriptor.
3492 o Remove IVs from cipher code, since AES-ctr has none.
3493 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
3494 o We were using an array of length zero in a few places.
3495 o win32's gethostbyname can't resolve an IP to an IP.
3496 o win32's close can't close a socket.
3499 Changes in version 0.0.6rc2 - 2004-04-26
3500 o Fix a bug where we were closing tls connections intermittently.
3501 It turns out openssl keeps its errors around -- so if an error
3502 happens, and you don't ask about it, and then another openssl
3503 operation happens and succeeds, and you ask if there was an error,
3504 it tells you about the first error. Fun fun.
3505 o Fix a bug that's been lurking since 27 may 03 (!)
3506 When passing back a destroy cell, we would use the wrong circ id.
3507 'Mostly harmless', but still worth fixing.
3508 o Since we don't support truncateds much, don't bother sending them;
3509 just close the circ.
3510 o check for <machine/limits.h> so we build on NetBSD again (I hope).
3511 o don't crash if a conn that sent a begin has suddenly lost its circuit
3512 (this was quite rare).
3515 Changes in version 0.0.6rc1 - 2004-04-25
3516 o We now rotate link (tls context) keys and onion keys.
3517 o CREATE cells now include oaep padding, so you can tell
3518 if you decrypted them correctly.
3519 o Add bandwidthburst to server descriptor.
3520 o Directories now say which dirserver signed them.
3521 o Use a tor_assert macro that logs failed assertions too.
3524 Changes in version 0.0.6pre5 - 2004-04-18
3525 o changes from 0.0.6pre4:
3526 - make tor build on broken freebsd 5.2 installs
3527 - fix a failed assert when you try an intro point, get a nack, and try
3528 a second one and it works.
3529 - when alice uses a port that the hidden service doesn't accept,
3530 it now sends back an end cell (denied by exit policy). otherwise
3531 alice would just have to wait to time out.
3532 - fix another rare bug: when we had tried all the intro
3533 points for a hidden service, we fetched the descriptor
3534 again, but we left our introcirc thinking it had already
3535 sent an intro, so it kept waiting for a response...
3536 - bugfix: when you sleep your hidden-service laptop, as soon
3537 as it wakes up it tries to upload a service descriptor, but
3538 socketpair fails for some reason (localhost not up yet?).
3539 now we simply give up on that upload, and we'll try again later.
3540 i'd still like to find the bug though.
3541 - if an intro circ waiting for an ack dies before getting one, then
3543 - we were reusing stale service descriptors and refetching usable
3547 Changes in version 0.0.6pre4 - 2004-04-14
3548 o changes from 0.0.6pre3:
3549 - when bob fails to connect to the rendezvous point, and his
3550 circ didn't fail because of the rendezvous point itself, then
3551 he retries a couple of times
3552 - we expire introduction and rendezvous circs more thoroughly
3553 (sometimes they were hanging around forever)
3554 - we expire unattached rendezvous streams that have been around
3555 too long (they were sticking around forever).
3556 - fix a measly fencepost error that was crashing everybody with
3560 Changes in version 0.0.6pre3 - 2004-04-14
3561 o changes from 0.0.6pre2:
3562 - make hup work again
3563 - fix some memory leaks for dirservers
3564 - allow more skew in rendezvous descriptor timestamps, to help
3565 handle people like blanu who don't know what time it is
3566 - normal circs are 3 hops, but some rend/intro circs are 4, if
3567 the initiator doesn't get to choose the last hop
3568 - send acks for introductions, so alice can know whether to try
3570 - bob publishes intro points more correctly
3571 o changes from 0.0.5:
3572 - fix an assert trigger that's been plaguing us since the days
3573 of 0.0.2prexx (thanks weasel!)
3574 - retry stream correctly when we fail to connect because of
3575 exit-policy-reject (should try another) or can't-resolve-address
3576 (also should try another, because dns on random internet servers
3578 - when we hup a dirserver and we've *removed* a server from the
3579 approved-routers list, now we remove that server from the
3580 in-memory directories too
3583 Changes in version 0.0.6pre2 - 2004-04-08
3584 o We fixed our base32 implementation. Now it works on all architectures.
3587 Changes in version 0.0.6pre1 - 2004-04-08
3589 - Hidden services and rendezvous points are implemented. Go to
3590 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
3591 hidden services. (This only works via a socks4a proxy such as
3592 Privoxy, and currently it's quite slow.)
3595 Changes in version 0.0.5 - 2004-03-30
3599 Changes in version 0.0.5rc3 - 2004-03-29
3600 o Install torrc as torrc.sample -- we no longer clobber your
3602 o Re-enable recommendedversion checking (we broke it in rc2, oops)
3603 o Add in a 'notice' log level for things the operator should hear
3604 but that aren't warnings
3607 Changes in version 0.0.5rc2 - 2004-03-29
3608 o Hold socks connection open until reply is flushed (if possible)
3609 o Make exit nodes resolve IPs to IPs immediately, rather than asking
3610 the dns farm to do it.
3611 o Fix c99 aliasing warnings in rephist.c
3612 o Don't include server descriptors that are older than 24 hours in the
3614 o Give socks 'reject' replies their whole 15s to attempt to flush,
3615 rather than seeing the 60s timeout and assuming the flush had failed.
3616 o Clean automake droppings from the cvs repository
3619 Changes in version 0.0.5rc1 - 2004-03-28
3620 o Fix mangled-state bug in directory fetching (was causing sigpipes).
3621 o Only build circuits after we've fetched the directory: clients were
3622 using only the directory servers before they'd fetched a directory.
3623 This also means longer startup time; so it goes.
3624 o Fix an assert trigger where an OP would fail to handshake, and we'd
3625 expect it to have a nickname.
3626 o Work around a tsocks bug: do a socks reject when AP connection dies
3627 early, else tsocks goes into an infinite loop.
3630 Changes in version 0.0.4 - 2004-03-26
3631 o When connecting to a dirserver or OR and the network is down,
3635 Changes in version 0.0.3 - 2004-03-26
3636 o Warn and fail if server chose a nickname with illegal characters
3637 o Port to Solaris and Sparc:
3638 - include missing header fcntl.h
3639 - have autoconf find -lsocket -lnsl automatically
3640 - deal with hardware word alignment
3641 - make uname() work (solaris has a different return convention)
3642 - switch from using signal() to sigaction()
3643 o Preliminary work on reputation system:
3644 - Keep statistics on success/fail of connect attempts; they're published
3645 by kill -USR1 currently.
3646 - Add a RunTesting option to try to learn link state by creating test
3647 circuits, even when SocksPort is off.
3648 - Remove unused open circuits when there are too many.
3651 Changes in version 0.0.2 - 2004-03-19
3652 - Include strlcpy and strlcat for safer string ops
3653 - define INADDR_NONE so we compile (but still not run) on solaris
3656 Changes in version 0.0.2pre27 - 2004-03-14
3658 - Allow internal tor networks (we were rejecting internal IPs,
3659 now we allow them if they're set explicitly).
3660 - And fix a few endian issues.
3663 Changes in version 0.0.2pre26 - 2004-03-14
3665 - If a stream times out after 15s without a connected cell, don't
3666 try that circuit again: try a new one.
3667 - Retry streams at most 4 times. Then give up.
3668 - When a dirserver gets a descriptor from an unknown router, it
3669 logs its fingerprint (so the dirserver operator can choose to
3670 accept it even without mail from the server operator).
3671 - Inform unapproved servers when we reject their descriptors.
3672 - Make tor build on Windows again. It works as a client, who knows
3674 - Clearer instructions in the torrc for how to set up a server.
3675 - Be more efficient about reading fd's when our global token bucket
3676 (used for rate limiting) becomes empty.
3678 - Stop asserting that computers always go forward in time. It's
3680 - When we sent a cell (e.g. destroy) and then marked an OR connection
3681 expired, we might close it before finishing a flush if the other
3682 side isn't reading right then.
3683 - Don't allow dirservers to start if they haven't defined
3685 - We were caching transient dns failures. Oops.
3686 - Prevent servers from publishing an internal IP as their address.
3687 - Address a strcat vulnerability in circuit.c
3690 Changes in version 0.0.2pre25 - 2004-03-04
3692 - Put the OR's IP in its router descriptor, not its fqdn. That way
3693 we'll stop being stalled by gethostbyname for nodes with flaky dns,
3696 - If the user typed in an address that didn't resolve, the server
3700 Changes in version 0.0.2pre24 - 2004-03-03
3702 - Fix an assertion failure in dns.c, where we were trying to dequeue
3703 a pending dns resolve even if it wasn't pending
3704 - Fix a spurious socks5 warning about still trying to write after the
3705 connection is finished.
3706 - Hold certain marked_for_close connections open until they're finished
3707 flushing, rather than losing bytes by closing them too early.
3708 - Correctly report the reason for ending a stream
3709 - Remove some duplicate calls to connection_mark_for_close
3710 - Put switch_id and start_daemon earlier in the boot sequence, so it
3711 will actually try to chdir() to options.DataDirectory
3712 - Make 'make test' exit(1) if a test fails; fix some unit tests
3713 - Make tor fail when you use a config option it doesn't know about,
3714 rather than warn and continue.
3715 - Make --version work
3716 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
3719 Changes in version 0.0.2pre23 - 2004-02-29
3721 - Print a statement when the first circ is finished, so the user
3723 - If a relay cell is unrecognized at the end of the circuit,
3724 send back a destroy. (So attacks to mutate cells are more
3726 - New config option 'excludenodes' to avoid certain nodes for circuits.
3727 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
3728 so you can collect coredumps there.
3730 - Fix a bug in tls flushing where sometimes data got wedged and
3731 didn't flush until more data got sent. Hopefully this bug was
3732 a big factor in the random delays we were seeing.
3733 - Make 'connected' cells include the resolved IP, so the client
3734 dns cache actually gets populated.
3735 - Disallow changing from ORPort=0 to ORPort>0 on hup.
3736 - When we time-out on a stream and detach from the circuit, send an
3737 end cell down it first.
3738 - Only warn about an unknown router (in exitnodes, entrynodes,
3739 excludenodes) after we've fetched a directory.
3742 Changes in version 0.0.2pre22 - 2004-02-26
3744 - Servers publish less revealing uname information in descriptors.
3745 - More memory tracking and assertions, to crash more usefully when
3747 - If the default torrc isn't there, just use some default defaults.
3748 Plus provide an internal dirservers file if they don't have one.
3749 - When the user tries to use Tor as an http proxy, give them an http
3750 501 failure explaining that we're a socks proxy.
3751 - Dump a new router.desc on hup, to help confused people who change
3752 their exit policies and then wonder why router.desc doesn't reflect
3754 - Clean up the generic tor.sh init script that we ship with.
3756 - If the exit stream is pending on the resolve, and a destroy arrives,
3757 then the stream wasn't getting removed from the pending list. I
3758 think this was the one causing recent server crashes.
3759 - Use a more robust poll on OSX 10.3, since their poll is flaky.
3760 - When it couldn't resolve any dirservers, it was useless from then on.
3761 Now it reloads the RouterFile (or default dirservers) if it has no
3763 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
3764 many users don't even *have* a /usr/local/sbin/.
3767 Changes in version 0.0.2pre21 - 2004-02-18
3769 - There's a ChangeLog file that actually reflects the changelog.
3770 - There's a 'torify' wrapper script, with an accompanying
3771 tor-tsocks.conf, that simplifies the process of using tsocks for
3772 tor. It even has a man page.
3773 - The tor binary gets installed to sbin rather than bin now.
3774 - Retry streams where the connected cell hasn't arrived in 15 seconds
3775 - Clean up exit policy handling -- get the default out of the torrc,
3776 so we can update it without forcing each server operator to fix
3778 - Allow imaps and pop3s in default exit policy
3780 - Prevent picking middleman nodes as the last node in the circuit
3783 Changes in version 0.0.2pre20 - 2004-01-30
3785 - We now have a deb package, and it's in debian unstable. Go to
3787 - I've split the TotalBandwidth option into BandwidthRate (how many
3788 bytes per second you want to allow, long-term) and
3789 BandwidthBurst (how many bytes you will allow at once before the cap
3790 kicks in). This better token bucket approach lets you, say, set
3791 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
3792 performance while not exceeding your monthly bandwidth quota.
3793 - Push out a tls record's worth of data once you've got it, rather
3794 than waiting until you've read everything waiting to be read. This
3795 may improve performance by pipelining better. We'll see.
3796 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
3797 from failed circuits (if they haven't been connected yet) and attach
3799 - Expire old streams that haven't managed to connect. Some day we'll
3800 have them reattach to new circuits instead.
3803 - Fix several memory leaks that were causing servers to become bloated
3805 - Fix a few very rare assert triggers. A few more remain.
3806 - Setuid to User _before_ complaining about running as root.
3809 Changes in version 0.0.2pre19 - 2004-01-07
3811 - Fix deadlock condition in dns farm. We were telling a child to die by
3812 closing the parent's file descriptor to him. But newer children were
3813 inheriting the open file descriptor from the parent, and since they
3814 weren't closing it, the socket never closed, so the child never read
3815 eof, so he never knew to exit. Similarly, dns workers were holding
3816 open other sockets, leading to all sorts of chaos.
3817 - New cleaner daemon() code for forking and backgrounding.
3818 - If you log to a file, it now prints an entry at the top of the
3819 logfile so you know it's working.
3820 - The onionskin challenge length was 30 bytes longer than necessary.
3821 - Started to patch up the spec so it's not quite so out of date.
3824 Changes in version 0.0.2pre18 - 2004-01-02
3826 - Fix endian issues with the 'integrity' field in the relay header.
3827 - Fix a potential bug where connections in state
3828 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
3831 Changes in version 0.0.2pre17 - 2003-12-30
3833 - Made --debuglogfile (or any second log file, actually) work.
3834 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
3835 adversary could force us into an infinite loop.
3838 - Each onionskin handshake now includes a hash of the computed key,
3839 to prove the server's identity and help perfect forward secrecy.
3840 - Changed cell size from 256 to 512 bytes (working toward compatibility
3842 - Changed cell length to 2 bytes, and moved it to the relay header.
3843 - Implemented end-to-end integrity checking for the payloads of
3845 - Separated streamid from 'recognized' (otherwise circuits will get
3846 messed up when we try to have streams exit from the middle). We
3847 use the integrity-checking to confirm that a cell is addressed to
3849 - Randomize the initial circid and streamid values, so an adversary who
3850 breaks into a node can't learn how many circuits or streams have
3854 Changes in version 0.0.2pre16 - 2003-12-14
3856 - Fixed a bug that made HUP trigger an assert
3857 - Fixed a bug where a circuit that immediately failed wasn't being
3858 counted as a failed circuit in counting retries.
3861 - Now we close the circuit when we get a truncated cell: otherwise we're
3862 open to an anonymity attack where a bad node in the path truncates
3863 the circuit and then we open streams at him.
3864 - Add port ranges to exit policies
3865 - Add a conservative default exit policy
3866 - Warn if you're running tor as root
3867 - on HUP, retry OR connections and close/rebind listeners
3868 - options.EntryNodes: try these nodes first when picking the first node
3869 - options.ExitNodes: if your best choices happen to include any of
3870 your preferred exit nodes, you choose among just those preferred
3872 - options.ExcludedNodes: nodes that are never picked in path building
3875 Changes in version 0.0.2pre15 - 2003-12-03
3876 o Robustness and bugfixes:
3877 - Sometimes clients would cache incorrect DNS resolves, which would
3878 really screw things up.
3879 - An OP that goes offline would slowly leak all its sockets and stop
3881 - A wide variety of bugfixes in exit node selection, exit policy
3882 handling, and processing pending streams when a new circuit is
3884 - Pick nodes for a path only from those the directory says are up
3885 - Choose randomly from all running dirservers, not always the first one
3886 - Increase allowed http header size for directory fetch.
3887 - Stop writing to stderr (if we're daemonized it will be closed).
3888 - Enable -g always, so cores will be more useful to me.
3889 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
3892 - Wrote a man page. It lists commonly used options.
3895 - Change default loglevel to warn.
3896 - Make PidFile default to null rather than littering in your CWD.
3897 - OnionRouter config option is now obsolete. Instead it just checks
3899 - Moved to a single unified torrc file for both clients and servers.
3902 Changes in version 0.0.2pre14 - 2003-11-29
3903 o Robustness and bugfixes:
3904 - Force the admin to make the DataDirectory himself
3905 - to get ownership/permissions right
3906 - so clients no longer make a DataDirectory and then never use it
3907 - fix bug where a client who was offline for 45 minutes would never
3908 pull down a directory again
3909 - fix (or at least hide really well) the dns assert bug that was
3910 causing server crashes
3911 - warnings and improved robustness wrt clockskew for certs
3912 - use the native daemon(3) to daemonize, when available
3913 - exit if bind() fails
3914 - exit if neither socksport nor orport is defined
3915 - include our own tor_timegm (Win32 doesn't have its own)
3916 - bugfix for win32 with lots of connections
3917 - fix minor bias in PRNG
3918 - make dirserver more robust to corrupt cached directory
3921 - Wrote the design document (woo)
3923 o Circuit building and exit policies:
3924 - Circuits no longer try to use nodes that the directory has told them
3926 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
3927 bitcounts (18.0.0.0/8).
3928 - Make AP connections standby for a circuit if no suitable circuit
3929 exists, rather than failing
3930 - Circuits choose exit node based on addr/port, exit policies, and
3931 which AP connections are standing by
3932 - Bump min pathlen from 2 to 3
3933 - Relay end cells have a payload to describe why the stream ended.
3934 - If the stream failed because of exit policy, try again with a new
3936 - Clients have a dns cache to remember resolved addresses.
3937 - Notice more quickly when we have no working circuits
3940 - APPort is now called SocksPort
3941 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
3943 - RecommendedVersions is now a config variable rather than
3944 hardcoded (for dirservers)
3945 - Reloads config on HUP
3946 - Usage info on -h or --help
3947 - If you set User and Group config vars, it'll setu/gid to them.
3949 Changes in version 0.0.2pre13 - 2003-10-19
3950 o General stability:
3951 - SSL_write no longer fails when it returns WANTWRITE and the number
3952 of bytes in the buf has changed by the next SSL_write call.
3953 - Fix segfault fetching directory when network is down
3954 - Fix a variety of minor memory leaks
3955 - Dirservers reload the fingerprints file on HUP, so I don't have
3956 to take down the network when I approve a new router
3957 - Default server config file has explicit Address line to specify fqdn
3960 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
3961 - Make listener connections not ever alloc bufs
3963 o Autoconf improvements:
3964 - don't clobber an external CFLAGS in ./configure
3965 - Make install now works
3966 - create var/lib/tor on make install
3967 - autocreate a tor.sh initscript to help distribs
3968 - autocreate the torrc and sample-server-torrc with correct paths
3970 o Log files and Daemonizing now work:
3971 - If --DebugLogFile is specified, log to it at -l debug
3972 - If --LogFile is specified, use it instead of commandline
3973 - If --RunAsDaemon is set, tor forks and backgrounds on startup