1 Changes in version 0.1.2.5-alpha - 2007-01-03
3 - Enable "BEGIN_DIR" cells: prefer to connect to the directory
4 server via TLS so we do encrypted directory requests rather than
5 plaintext. On by default; disable via the TunnelDirConns config
7 - Enable write limiting as well as read limiting. Now we sacrifice
8 capacity if we're pushing out lots of directory traffic, rather
9 than overrunning the user's intended bandwidth limits.
10 - Authorities now include server versions in networkstatus. This adds
11 about 2% to the side of compressed networkstatus docs, and allows
12 clients to tell which servers support BEGIN_DIR and which don't.
13 The implementation is forward-compatible with a proposed future
14 protocol version scheme not tied to Tor versions.
15 - Support running the Tor service with a torrc not in the
16 same directory as tor.exe (Bug #356) and default to using the torrc
17 located in the %appdata%\Tor\ of the user who installed the service.
18 Patch from Matt Edman.
19 - Include TLS overhead when counting bandwidth usage; previously, we
20 would count only the bytes sent over TLS, but not the bytes used to
24 - Start using the state file to store bandwidth accounting data:
25 the bw_accounting file is now obsolete. We'll keep generating it
26 for a while for people who are still using 0.1.2.4-alpha.
27 - Try to batch changes to the state file so that we do as few
28 disk writes as possible while still storing important things in
30 - Ongoing work on eventdns infrastructure: add dns server and ipv6
32 - Make PIDFile work on Windows (untested).
33 - Add internal descriptions for a bunch of configuration options:
34 accessible via controller interface and in comments in saved
36 - Reject *:563 (NTTPS) in the default exit policy. We already reject
37 NNTP by default, so this seems like a sensible addition.
38 - Authorities do not recommend exits as guards if this would shift
39 excess load to the exit nodes.
40 - Avoid some inadvertent info leaks by making clients reject hostnames
41 with invalid characters. Add an option "AllowNonRFC953Hostnames"
42 to disable this behavior, in case somebody is running a private
43 network with hosts called @, !, and #.
44 - Add a new address-spec.txt document to describe our special-case
45 addresses: .exit, .onion, and .noconnnect.
46 - Add a maintainer script to tell us which options are missing
48 - Remove some options that have been deprecated since at least 0.1.0.x:
49 AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and SysLog. Use
50 AccountingMax instead of AccountingMaxKB; use Log to set log options.
51 - DirServer configuration lines now have an orport option so clients can
52 open encrypted tunnels to the authorities without having downloaded
53 their descriptors yet.
54 - Clients track responses with status 503 from dirservers. After a
55 dirserver has given us a 503, we try not to use it until an hour
56 has gone by, or until we have no dirservers that haven't given us
58 - The state file and the bw_accounting file get saved less often when
59 AvoidDiskWrites is set.
60 - We no longer look for identity and onion keys in "identity.key" and
61 "onion.key" -- these were replaced by secret_id_key and
62 secret_onion_key in 0.0.8pre1.
63 - We no longer require unrecognized directory entries to be preceded by
65 - When we get a 503 from a directory, and we're not a server, we don't
66 count the failure against the total number of failures allowed for the
67 thing we're trying to download.
68 - Report X-Your-Address-Is correctly from tunneled directory connections;
69 don't report X-Your-Address-Is is when it's an internal address; and
70 never believe reported remote addresses when they're internal.
71 - Add client-side caching for reverse DNS lookups.
72 - Add support to tor-resolve for reverse lookups and SOCKS5.
73 - We now check for the case when common DNS requests are going to
74 wildcarded addresses, and change our exit policy to reject *:* if
75 it's happening. (Bug #364)
76 - When we change nameservers or IP addresses, reset and re-launch
77 our tests for DNS hijacking.
78 - Block an obscure DoS attack from directory caches.
81 - Stop sending the HttpProxyAuthenticator string to directory
82 servers when directory connections are tunnelled through Tor.
83 - Clients no longer store bandwidth history in the state file.
84 - Do not log introduction points for hidden services if SafeLogging
86 - When generating bandwidth history, round down to the nearest
87 1k. When storing accounting data, round up to the nearest 1k.
88 - When we're running as a server, remember when we last rotated onion
89 keys, so that we will rotate keys once they're a week old even if
90 we never stay up for a week ourselves.
93 - Fix a longstanding bug in eventdns that prevented the count of
94 timed-out resolves from ever being reset. This bug caused us to
95 give up on a nameserver the third time it timed out, and try it
96 10 seconds later... and to give up on it every time it timed out
97 after that. (May fix bug 326.)
98 - Take out the '5 second' timeout from the connection retry
99 schedule. Now the first connect attempt will wait a full 10
100 seconds before switching to a new circuit. Perhaps this will help
101 a lot. Based on observations from Mike Perry.
102 - Fix a bug on the Windows implementation of tor_mmap_file() that
103 would prevent the cached-routers file from ever loading (reported
107 - Fix a bug when a BSD-style PF socket is first used. (Patch from
109 - Fix an assert failure when a directory authority sets
110 AuthDirRejectUnlisted and then receives a descriptor from an
111 unlisted router (reported by seeess).
112 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
113 to resolve an address at a given exit node even when they ask for
115 - Routers no longer ever list themselves in their "family" line,
116 even if configured to do so. This makes it easier to configure
117 family lists efficiently.
118 - When running as a server, don't fall back to 127.0.0.1 when no
119 nameservers are configured in /etc/resolv.conf; instead, make the
120 user fix resolv.conf or specify nameservers explicitly. (Resolves
122 - Stop accepting certain malformed ports in configured exit policies.
123 - Don't re-write the fingerprint file every restart, unless it has
125 - Cleaned-up code and documentation in NT services. Patch from Matt
127 - Removed the supposedly misleading error message mentioned in Bug #294.
128 Patch from Matt Edman.
129 - Stop warning when a single nameserver fails: only warn when _all_ of
130 our nameservers have failed. (Bug #326.)
131 - When we only have one nameserver, raise the threshold for deciding that
132 the nameserver is dead. (Also bug #326)
133 - Directory authorities now only decide that routers are reachable
134 if their identity keys are as expected.
135 - When the user uses bad syntax in the Log config line, stop
136 suggesting other bad syntax as a replacement.
138 o Controller features:
139 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
140 - Reimplement GETINFO so that info/names stays in sync with the
142 - Implement "GETINFO fingerprint".
143 - Implement "SETEVENTS GUARD" so controllers can get updates on
144 entry guard status as it changes.
146 o Controller bugfixes:
147 - Report the circuit number correctly in STREAM CLOSED events. (Bug
148 reported by Mike Perry.)
149 - Do not report bizarre values for results of accounting GETINFOs
150 when the last second's write or read exceeds the alloted bandwidth.
151 - Report "unrecognized key" rather than an empty string when the
152 controller tries to fetch a networkstatus that doesn't exist.
155 Changes in version 0.1.2.4-alpha - 2006-12-03
157 - Add support for using natd; this allows FreeBSDs earlier than
158 5.1.2 to have ipfw send connections through Tor without using
159 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
162 - Make all connections to addresses of the form ".noconnect"
163 immediately get closed. This lets application/controller combos
164 successfully test whether they're talking to the same Tor by
165 watching for STREAM events.
166 - Make cross.sh cross-compilation script work even when autogen.sh
167 hasn't been run. (Patch from Michael Mohr.)
168 - Statistics dumped by -USR2 now include a breakdown of public key
169 operations, for profiling.
172 - Fix a major leak when directory authorities parse their
173 approved-routers list, a minor memory leak when we fail to pick
174 an exit node, and a few rare leaks on errors.
175 - Handle TransPort connections even when the server sends data before
176 the client sends data. Previously, the connection would just hang
177 until the client sent data. (Patch from tup based on patch from
179 - Avoid assert failure when our cached-routers file is empty on
183 - Don't log spurious warnings when we see a circuit close reason we
184 don't recognize; it's probably just from a newer version of Tor.
185 - Have directory authorities allow larger amounts of drift in uptime
186 without replacing the server descriptor: previously, a server that
187 restarted every 30 minutes could have 48 "interesting" descriptors
189 - Start linking to the Tor specification and Tor reference manual
190 correctly in the Windows installer.
191 - Add Vidalia to the OS X uninstaller script, so when we uninstall
192 Tor/Privoxy we also uninstall Vidalia.
193 - Resume building on Irix64, and fix a lot of warnings from its
195 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
196 when we're running as a client.
199 Changes in version 0.1.2.3-alpha - 2006-10-29
201 - Prepare for servers to publish descriptors less often: never
202 discard a descriptor simply for being too old until either it is
203 recommended by no authorities, or until we get a better one for
204 the same router. Make caches consider retaining old recommended
205 routers for even longer.
206 - If most authorities set a BadExit flag for a server, clients
207 don't think of it as a general-purpose exit. Clients only consider
208 authorities that advertise themselves as listing bad exits.
209 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
210 headers for content, so that we can work better in the presence of
211 caching HTTP proxies.
212 - Allow authorities to list nodes as bad exits by fingerprint or by
215 o Minor features, controller:
216 - Add a REASON field to CIRC events; for backward compatibility, this
217 field is sent only to controllers that have enabled the extended
218 event format. Also, add additional reason codes to explain why
219 a given circuit has been destroyed or truncated. (Patches from
221 - Add a REMOTE_REASON field to extended CIRC events to tell the
222 controller about why a remote OR told us to close a circuit.
223 - Stream events also now have REASON and REMOTE_REASON fields,
224 working much like those for circuit events.
225 - There's now a GETINFO ns/... field so that controllers can ask Tor
226 about the current status of a router.
227 - A new event type "NS" to inform a controller when our opinion of
228 a router's status has changed.
229 - Add a GETINFO events/names and GETINFO features/names so controllers
230 can tell which events and features are supported.
231 - A new CLEARDNSCACHE signal to allow controllers to clear the
232 client-side DNS cache without expiring circuits.
235 - When the user sends a NEWNYM signal, clear the client-side DNS
236 cache too. Otherwise we continue to act on previous information.
239 - Avoid sending junk to controllers or segfaulting when a controller
240 uses EVENT_NEW_DESC with verbose nicknames.
241 - Stop triggering asserts if the controller tries to extend hidden
242 service circuits (reported by mwenge).
243 - Avoid infinite loop on unexpected controller input.
244 - When the controller does a "GETINFO network-status", tell it
245 about even those routers whose descriptors are very old, and use
246 long nicknames where appropriate.
247 - Change NT service functions to be loaded on demand. This lets us
248 build with MinGW without breaking Tor for Windows 98 users.
249 - Do DirPort reachability tests less often, since a single test
250 chews through many circuits before giving up.
251 - In the hidden service example in torrc.sample, stop recommending
252 esoteric and discouraged hidden service options.
253 - When stopping an NT service, wait up to 10 sec for it to actually
254 stop. (Patch from Matt Edman; resolves bug 295.)
255 - Fix handling of verbose nicknames with ORCONN controller events:
256 make them show up exactly when requested, rather than exactly when
258 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
259 printing a duplicate "$" in the keys we send (reported by mwenge).
260 - Correctly set maximum connection limit on Cygwin. (This time
262 - Try to detect Windows correctly when cross-compiling.
263 - Detect the size of the routers file correctly even if it is
264 corrupted (on systems without mmap) or not page-aligned (on systems
265 with mmap). This bug was harmless.
266 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
267 to open a stream fails; now we do in more cases. This should
268 make clients able to find a good exit faster in some cases, since
269 unhandleable requests will now get an error rather than timing out.
270 - Resolve two memory leaks when rebuilding the on-disk router cache
271 (reported by fookoowa).
272 - Clean up minor code warnings suggested by the MIPSpro C compiler,
273 and reported by some Centos users.
274 - Controller signals now work on non-Unix platforms that don't define
275 SIGUSR1 and SIGUSR2 the way we expect.
276 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
277 values before failing, and always enables eventdns.
278 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
279 Try to fix this in configure.in by checking for most functions
280 before we check for libevent.
283 Changes in version 0.1.2.2-alpha - 2006-10-07
285 - Make our async eventdns library on-by-default for Tor servers,
286 and plan to deprecate the separate dnsworker threads.
287 - Add server-side support for "reverse" DNS lookups (using PTR
288 records so clients can determine the canonical hostname for a given
289 IPv4 address). Only supported by servers using eventdns; servers
290 now announce in their descriptors whether they support eventdns.
291 - Specify and implement client-side SOCKS5 interface for reverse DNS
292 lookups (see doc/socks-extensions.txt).
293 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
294 connect to directory servers through Tor. Previously, clients needed
295 to find Tor exits to make private connections to directory servers.
296 - Avoid choosing Exit nodes for entry or middle hops when the
297 total bandwidth available from non-Exit nodes is much higher than
298 the total bandwidth available from Exit nodes.
299 - Workaround for name servers (like Earthlink's) that hijack failing
300 DNS requests and replace the no-such-server answer with a "helpful"
301 redirect to an advertising-driven search portal. Also work around
302 DNS hijackers who "helpfully" decline to hijack known-invalid
303 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
304 lets you turn it off.
305 - Send out a burst of long-range padding cells once we've established
306 that we're reachable. Spread them over 4 circuits, so hopefully
307 a few will be fast. This exercises our bandwidth and bootstraps
308 us into the directory more quickly.
310 o New/improved config options:
311 - Add new config option "ResolvConf" to let the server operator
312 choose an alternate resolve.conf file when using eventdns.
313 - Add an "EnforceDistinctSubnets" option to control our "exclude
314 servers on the same /16" behavior. It's still on by default; this
315 is mostly for people who want to operate private test networks with
316 all the machines on the same subnet.
317 - If one of our entry guards is on the ExcludeNodes list, or the
318 directory authorities don't think it's a good guard, treat it as
319 if it were unlisted: stop using it as a guard, and throw it off
320 the guards list if it stays that way for a long time.
321 - Allow directory authorities to be marked separately as authorities
322 for the v1 directory protocol, the v2 directory protocol, and
323 as hidden service directories, to make it easier to retire old
324 authorities. V1 authorities should set "HSAuthoritativeDir 1"
325 to continue being hidden service authorities too.
326 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
328 o Minor features, controller:
329 - Fix CIRC controller events so that controllers can learn the
330 identity digests of non-Named servers used in circuit paths.
331 - Let controllers ask for more useful identifiers for servers. Instead
332 of learning identity digests for un-Named servers and nicknames
333 for Named servers, the new identifiers include digest, nickname,
334 and indication of Named status. Off by default; see control-spec.txt
335 for more information.
336 - Add a "getinfo address" controller command so it can display Tor's
337 best guess to the user.
338 - New controller event to alert the controller when our server
339 descriptor has changed.
340 - Give more meaningful errors on controller authentication failure.
342 o Minor features, other:
343 - When asked to resolve a hostname, don't use non-exit servers unless
344 requested to do so. This allows servers with broken DNS to be
345 useful to the network.
346 - Divide eventdns log messages into warn and info messages.
347 - Reserve the nickname "Unnamed" for routers that can't pick
348 a hostname: any router can call itself Unnamed; directory
349 authorities will never allocate Unnamed to any particular router;
350 clients won't believe that any router is the canonical Unnamed.
351 - Only include function names in log messages for info/debug messages.
352 For notice/warn/err, the content of the message should be clear on
353 its own, and printing the function name only confuses users.
354 - Avoid some false positives during reachability testing: don't try
355 to test via a server that's on the same /24 as us.
356 - If we fail to build a circuit to an intended enclave, and it's
357 not mandatory that we use that enclave, stop wanting it.
358 - When eventdns is enabled, allow multithreaded builds on NetBSD and
359 OpenBSD. (We had previously disabled threads on these platforms
360 because they didn't have working thread-safe resolver functions.)
362 o Major bugfixes, anonymity/security:
363 - If a client asked for a server by name, and there's a named server
364 in our network-status but we don't have its descriptor yet, we
365 could return an unnamed server instead.
366 - Fix NetBSD bug that could allow someone to force uninitialized RAM
367 to be sent to a server's DNS resolver. This only affects NetBSD
368 and other platforms that do not bounds-check tolower().
369 - Reject (most) attempts to use Tor circuits with length one. (If
370 many people start using Tor as a one-hop proxy, exit nodes become
371 a more attractive target for compromise.)
372 - Just because your DirPort is open doesn't mean people should be
373 able to remotely teach you about hidden service descriptors. Now
374 only accept rendezvous posts if you've got HSAuthoritativeDir set.
376 o Major bugfixes, other:
377 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
378 - When a client asks the server to resolve (not connect to)
379 an address, and it has a cached answer, give them the cached answer.
380 Previously, the server would give them no answer at all.
381 - Allow really slow clients to not hang up five minutes into their
382 directory downloads (suggested by Adam J. Richter).
383 - We were building exactly the wrong circuits when we anticipated
384 hidden service requirements, meaning Tor would have to build all
385 its circuits on demand.
386 - Avoid crashing when we mmap a router cache file of size 0.
387 - When testing reachability of our DirPort, don't launch new
388 tests when there's already one in progress -- unreachable
389 servers were stacking up dozens of testing streams.
391 o Minor bugfixes, correctness:
392 - If we're a directory mirror and we ask for "all" network status
393 documents, we would discard status documents from authorities
395 - Avoid a memory corruption bug when creating a hash table for
397 - Avoid controller-triggered crash when misusing certain commands
398 from a v0 controller on platforms that do not handle
399 printf("%s",NULL) gracefully.
400 - Don't crash when a controller sends a third argument to an
401 "extendcircuit" request.
402 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
403 response; fix error code when "getinfo dir/status/" fails.
404 - Avoid crash when telling controller stream-status and a stream
406 - Patch from Adam Langley to fix assert() in eventdns.c.
407 - Fix a debug log message in eventdns to say "X resolved to Y"
408 instead of "X resolved to X".
409 - Make eventdns give strings for DNS errors, not just error numbers.
410 - Track unreachable entry guards correctly: don't conflate
411 'unreachable by us right now' with 'listed as down by the directory
412 authorities'. With the old code, if a guard was unreachable by
413 us but listed as running, it would clog our guard list forever.
414 - Behave correctly in case we ever have a network with more than
415 2GB/s total advertised capacity.
416 - Make TrackExitHosts case-insensitive, and fix the behavior of
417 ".suffix" TrackExitHosts items to avoid matching in the middle of
419 - Finally fix the openssl warnings from newer gccs that believe that
420 ignoring a return value is okay, but casting a return value and
421 then ignoring it is a sign of madness.
422 - Prevent the contrib/exitlist script from printing the same
423 result more than once.
424 - Patch from Steve Hildrey: Generate network status correctly on
425 non-versioning dirservers.
426 - Don't listen to the X-Your-Address-Is hint if you did the lookup
427 via Tor; otherwise you'll think you're the exit node's IP address.
429 o Minor bugfixes, performance:
430 - Two small performance improvements on parsing descriptors.
431 - Major performance improvement on inserting descriptors: change
432 algorithm from O(n^2) to O(n).
433 - Make the common memory allocation path faster on machines where
434 malloc(0) returns a pointer.
435 - Start remembering X-Your-Address-Is directory hints even if you're
436 a client, so you can become a server more smoothly.
437 - Avoid duplicate entries on MyFamily line in server descriptor.
439 o Packaging, features:
440 - Remove architecture from OS X builds. The official builds are
441 now universal binaries.
442 - The Debian package now uses --verify-config when (re)starting,
443 to distinguish configuration errors from other errors.
444 - Update RPMs to require libevent 1.1b.
446 o Packaging, bugfixes:
447 - Patches so Tor builds with MinGW on Windows.
448 - Patches so Tor might run on Cygwin again.
449 - Resume building on non-gcc compilers and ancient gcc. Resume
450 building with the -O0 compile flag. Resume building cleanly on
452 - Run correctly on OS X platforms with case-sensitive filesystems.
453 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
454 - Add autoconf checks so Tor can build on Solaris x86 again.
457 - Documented (and renamed) ServerDNSSearchDomains and
458 ServerDNSResolvConfFile options.
459 - Be clearer that the *ListenAddress directives can be repeated
463 Changes in version 0.1.2.1-alpha - 2006-08-27
465 - Add "eventdns" async dns library from Adam Langley, tweaked to
466 build on OSX and Windows. Only enabled if you pass the
467 --enable-eventdns argument to configure.
468 - Allow servers with no hostname or IP address to learn their
469 IP address by asking the directory authorities. This code only
470 kicks in when you would normally have exited with a "no address"
471 error. Nothing's authenticated, so use with care.
472 - Rather than waiting a fixed amount of time between retrying
473 application connections, we wait only 5 seconds for the first,
474 10 seconds for the second, and 15 seconds for each retry after
475 that. Hopefully this will improve the expected user experience.
476 - Patch from Tup to add support for transparent AP connections:
477 this basically bundles the functionality of trans-proxy-tor
478 into the Tor mainline. Now hosts with compliant pf/netfilter
479 implementations can redirect TCP connections straight to Tor
480 without diverting through SOCKS. Needs docs.
481 - Busy directory servers save lots of memory by spooling server
482 descriptors, v1 directories, and v2 networkstatus docs to buffers
483 as needed rather than en masse. Also mmap the cached-routers
484 files, so we don't need to keep the whole thing in memory too.
485 - Automatically avoid picking more than one node from the same
486 /16 network when constructing a circuit.
487 - Revise and clean up the torrc.sample that we ship with; add
488 a section for BandwidthRate and BandwidthBurst.
491 - Split circuit_t into origin_circuit_t and or_circuit_t, and
492 split connection_t into edge, or, dir, control, and base structs.
493 These will save quite a bit of memory on busy servers, and they'll
494 also help us track down bugs in the code and bugs in the spec.
495 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
496 or later. Log when we are doing this, so we can diagnose it when
497 it fails. (Also, recommend libevent 1.1b for kqueue and
498 win32 methods; deprecate libevent 1.0b harder; make libevent
499 recommendation system saner.)
500 - Start being able to build universal binaries on OS X (thanks
502 - Export the default exit policy via the control port, so controllers
503 don't need to guess what it is / will be later.
504 - Add a man page entry for ProtocolWarnings.
505 - Add TestVia config option to the man page.
506 - Remove even more protocol-related warnings from Tor server logs,
507 such as bad TLS handshakes and malformed begin cells.
508 - Stop fetching descriptors if you're not a dir mirror and you
509 haven't tried to establish any circuits lately. [This currently
510 causes some dangerous behavior, because when you start up again
511 you'll use your ancient server descriptors.]
512 - New DirPort behavior: if you have your dirport set, you download
513 descriptors aggressively like a directory mirror, whether or not
515 - Get rid of the router_retry_connections notion. Now routers
516 no longer try to rebuild long-term connections to directory
517 authorities, and directory authorities no longer try to rebuild
518 long-term connections to all servers. We still don't hang up
519 connections in these two cases though -- we need to look at it
520 more carefully to avoid flapping, and we likely need to wait til
522 - Drop compatibility with obsolete Tors that permit create cells
523 to have the wrong circ_id_type.
524 - Re-enable per-connection rate limiting. Get rid of the "OP
525 bandwidth" concept. Lay groundwork for "bandwidth classes" --
526 separate global buckets that apply depending on what sort of conn
528 - Start publishing one minute or so after we find our ORPort
529 to be reachable. This will help reduce the number of descriptors
530 we have for ourselves floating around, since it's quite likely
531 other things (e.g. DirPort) will change during that minute too.
532 - Fork the v1 directory protocol into its own spec document,
533 and mark dir-spec.txt as the currently correct (v2) spec.
536 - When we find our DirPort to be reachable, publish a new descriptor
537 so we'll tell the world (reported by pnx).
538 - Publish a new descriptor after we hup/reload. This is important
539 if our config has changed such that we'll want to start advertising
540 our DirPort now, etc.
541 - Allow Tor to start when RunAsDaemon is set but no logs are set.
542 - When we have a state file we cannot parse, tell the user and
543 move it aside. Now we avoid situations where the user starts
544 Tor in 1904, Tor writes a state file with that timestamp in it,
545 the user fixes her clock, and Tor refuses to start.
546 - Fix configure.in to not produce broken configure files with
547 more recent versions of autoconf. Thanks to Clint for his auto*
549 - "tor --verify-config" now exits with -1(255) or 0 depending on
550 whether the config options are bad or good.
551 - Resolve bug 321 when using dnsworkers: append a period to every
552 address we resolve at the exit node, so that we do not accidentally
553 pick up local addresses, and so that failing searches are retried
554 in the resolver search domains. (This is already solved for
555 eventdns.) (This breaks Blossom servers for now.)
556 - If we are using an exit enclave and we can't connect, e.g. because
557 its webserver is misconfigured to not listen on localhost, then
558 back off and try connecting from somewhere else before we fail.
561 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
562 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
563 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
564 when the IP address is mapped through MapAddress to a hostname.
565 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
566 useless IPv6 DNS resolves.
567 - Patch suggested by Karsten Loesing: respond to SIGNAL command
568 before we execute the signal, in case the signal shuts us down.
569 - Clean up AllowInvalidNodes man page entry.
570 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
571 - Add more asserts to track down an assert error on a windows Tor
572 server with connection_add being called with socket == -1.
573 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
574 - Fix misleading log messages: an entry guard that is "unlisted",
575 as well as not known to be "down" (because we've never heard
576 of it), is not therefore "up".
577 - Remove code to special-case "-cvs" ending, since it has not
578 actually mattered since 0.0.9.
579 - Make our socks5 handling more robust to broken socks clients:
580 throw out everything waiting on the buffer in between socks
581 handshake phases, since they can't possibly (so the theory
582 goes) have predicted what we plan to respond to them.
585 Changes in version 0.1.1.26 - 2006-12-14
587 - Stop sending the HttpProxyAuthenticator string to directory
588 servers when directory connections are tunnelled through Tor.
589 - Clients no longer store bandwidth history in the state file.
590 - Do not log introduction points for hidden services if SafeLogging
594 - Fix an assert failure when a directory authority sets
595 AuthDirRejectUnlisted and then receives a descriptor from an
596 unlisted router (reported by seeess).
599 Changes in version 0.1.1.25 - 2006-11-04
601 - When a client asks us to resolve (rather than connect to)
602 an address, and we have a cached answer, give them the cached
603 answer. Previously, we would give them no answer at all.
604 - We were building exactly the wrong circuits when we predict
605 hidden service requirements, meaning Tor would have to build all
606 its circuits on demand.
607 - If none of our live entry guards have a high uptime, but we
608 require a guard with a high uptime, try adding a new guard before
609 we give up on the requirement. This patch should make long-lived
610 connections more stable on average.
611 - When testing reachability of our DirPort, don't launch new
612 tests when there's already one in progress -- unreachable
613 servers were stacking up dozens of testing streams.
616 - When the user sends a NEWNYM signal, clear the client-side DNS
617 cache too. Otherwise we continue to act on previous information.
620 - Avoid a memory corruption bug when creating a hash table for
622 - Avoid possibility of controller-triggered crash when misusing
623 certain commands from a v0 controller on platforms that do not
624 handle printf("%s",NULL) gracefully.
625 - Avoid infinite loop on unexpected controller input.
626 - Don't log spurious warnings when we see a circuit close reason we
627 don't recognize; it's probably just from a newer version of Tor.
628 - Add Vidalia to the OS X uninstaller script, so when we uninstall
629 Tor/Privoxy we also uninstall Vidalia.
632 Changes in version 0.1.1.24 - 2006-09-29
634 - Allow really slow clients to not hang up five minutes into their
635 directory downloads (suggested by Adam J. Richter).
636 - Fix major performance regression from 0.1.0.x: instead of checking
637 whether we have enough directory information every time we want to
638 do something, only check when the directory information has changed.
639 This should improve client CPU usage by 25-50%.
640 - Don't crash if, after a server has been running for a while,
641 it can't resolve its hostname.
642 - When a client asks us to resolve (not connect to) an address,
643 and we have a cached answer, give them the cached answer.
644 Previously, we would give them no answer at all.
647 - Allow Tor to start when RunAsDaemon is set but no logs are set.
648 - Don't crash when the controller receives a third argument to an
649 "extendcircuit" request.
650 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
651 response; fix error code when "getinfo dir/status/" fails.
652 - Fix configure.in to not produce broken configure files with
653 more recent versions of autoconf. Thanks to Clint for his auto*
655 - Fix security bug on NetBSD that could allow someone to force
656 uninitialized RAM to be sent to a server's DNS resolver. This
657 only affects NetBSD and other platforms that do not bounds-check
659 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
660 methods: these are known to be buggy.
661 - If we're a directory mirror and we ask for "all" network status
662 documents, we would discard status documents from authorities
666 Changes in version 0.1.1.23 - 2006-07-30
668 - Fast Tor servers, especially exit nodes, were triggering asserts
669 due to a bug in handling the list of pending DNS resolves. Some
670 bugs still remain here; we're hunting them.
671 - Entry guards could crash clients by sending unexpected input.
672 - More fixes on reachability testing: if you find yourself reachable,
673 then don't ever make any client requests (so you stop predicting
674 circuits), then hup or have your clock jump, then later your IP
675 changes, you won't think circuits are working, so you won't try to
676 test reachability, so you won't publish.
679 - Avoid a crash if the controller does a resetconf firewallports
680 and then a setconf fascistfirewall=1.
681 - Avoid an integer underflow when the dir authority decides whether
682 a router is stable: we might wrongly label it stable, and compute
683 a slightly wrong median stability, when a descriptor is published
685 - Fix a place where we might trigger an assert if we can't build our
686 own server descriptor yet.
689 Changes in version 0.1.1.22 - 2006-07-05
691 - Fix a big bug that was causing servers to not find themselves
692 reachable if they changed IP addresses. Since only 0.1.1.22+
693 servers can do reachability testing correctly, now we automatically
694 make sure to test via one of these.
695 - Fix to allow clients and mirrors to learn directory info from
696 descriptor downloads that get cut off partway through.
697 - Directory authorities had a bug in deciding if a newly published
698 descriptor was novel enough to make everybody want a copy -- a few
699 servers seem to be publishing new descriptors many times a minute.
701 - Fix a rare bug that was causing some servers to complain about
702 "closing wedged cpuworkers" and skip some circuit create requests.
703 - Make the Exit flag in directory status documents actually work.
706 Changes in version 0.1.1.21 - 2006-06-10
707 o Crash and assert fixes from 0.1.1.20:
708 - Fix a rare crash on Tor servers that have enabled hibernation.
709 - Fix a seg fault on startup for Tor networks that use only one
711 - Fix an assert from a race condition that occurs on Tor servers
712 while exiting, where various threads are trying to log that they're
713 exiting, and delete the logs, at the same time.
714 - Make our unit tests pass again on certain obscure platforms.
717 - Add support for building SUSE RPM packages.
718 - Speed up initial bootstrapping for clients: if we are making our
719 first ever connection to any entry guard, then don't mark it down
721 - When only one Tor server in the network is labelled as a guard,
722 and we've already picked him, we would cycle endlessly picking him
723 again, being unhappy about it, etc. Now we specifically exclude
724 current guards when picking a new guard.
725 - Servers send create cells more reliably after the TLS connection
726 is established: we were sometimes forgetting to send half of them
727 when we had more than one pending.
728 - If we get a create cell that asks us to extend somewhere, but the
729 Tor server there doesn't match the expected digest, we now send
730 a destroy cell back, rather than silently doing nothing.
731 - Make options->RedirectExit work again.
732 - Make cookie authentication for the controller work again.
733 - Stop being picky about unusual characters in the arguments to
734 mapaddress. It's none of our business.
735 - Add a new config option "TestVia" that lets you specify preferred
736 middle hops to use for test circuits. Perhaps this will let me
737 debug the reachability problems better.
739 o Log / documentation fixes:
740 - If we're a server and some peer has a broken TLS certificate, don't
741 log about it unless ProtocolWarnings is set, i.e., we want to hear
742 about protocol violations by others.
743 - Fix spelling of VirtualAddrNetwork in man page.
744 - Add a better explanation at the top of the autogenerated torrc file
745 about what happened to our old torrc.
748 Changes in version 0.1.1.20 - 2006-05-23
749 o Crash and assert fixes from 0.1.0.17:
750 - Fix assert bug in close_logs() on exit: when we close and delete
751 logs, remove them all from the global "logfiles" list.
752 - Fix an assert error when we're out of space in the connection_list
753 and we try to post a hidden service descriptor (reported by Peter
755 - Fix a rare assert error when we've tried all intro points for
756 a hidden service and we try fetching the service descriptor again:
757 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed".
758 - Setconf SocksListenAddress kills Tor if it fails to bind. Now back
759 out and refuse the setconf if it would fail.
760 - If you specify a relative torrc path and you set RunAsDaemon in
761 your torrc, then it chdir()'s to the new directory. If you then
762 HUP, it tries to load the new torrc location, fails, and exits.
763 The fix: no longer allow a relative path to torrc when using -f.
764 - Check for integer overflows in more places, when adding elements
765 to smartlists. This could possibly prevent a buffer overflow
766 on malicious huge inputs.
768 o Security fixes, major:
769 - When we're printing strings from the network, don't try to print
770 non-printable characters. Now we're safer against shell escape
771 sequence exploits, and also against attacks to fool users into
772 misreading their logs.
773 - Implement entry guards: automatically choose a handful of entry
774 nodes and stick with them for all circuits. Only pick new guards
775 when the ones you have are unsuitable, and if the old guards
776 become suitable again, switch back. This will increase security
777 dramatically against certain end-point attacks. The EntryNodes
778 config option now provides some hints about which entry guards you
779 want to use most; and StrictEntryNodes means to only use those.
781 - Implement exit enclaves: if we know an IP address for the
782 destination, and there's a running Tor server at that address
783 which allows exit to the destination, then extend the circuit to
784 that exit first. This provides end-to-end encryption and end-to-end
785 authentication. Also, if the user wants a .exit address or enclave,
786 use 4 hops rather than 3, and cannibalize a general circ for it
788 - Obey our firewall options more faithfully:
789 . If we can't get to a dirserver directly, try going via Tor.
790 . Don't ever try to connect (as a client) to a place our
791 firewall options forbid.
792 . If we specify a proxy and also firewall options, obey the
793 firewall options even when we're using the proxy: some proxies
794 can only proxy to certain destinations.
795 - Make clients regenerate their keys when their IP address changes.
796 - For the OS X package's modified privoxy config file, comment
797 out the "logfile" line so we don't log everything passed
799 - Our TLS handshakes were generating a single public/private
800 keypair for the TLS context, rather than making a new one for
801 each new connection. Oops. (But we were still rotating them
802 periodically, so it's not so bad.)
803 - When we were cannibalizing a circuit with a particular exit
804 node in mind, we weren't checking to see if that exit node was
805 already present earlier in the circuit. Now we are.
806 - Require server descriptors to list IPv4 addresses -- hostnames
807 are no longer allowed. This also fixes potential vulnerabilities
808 to servers providing hostnames as their address and then
809 preferentially resolving them so they can partition users.
810 - Our logic to decide if the OR we connected to was the right guy
811 was brittle and maybe open to a mitm for invalid routers.
813 o Security fixes, minor:
814 - Adjust tor-spec.txt to parameterize cell and key lengths. Now
815 Ian Goldberg can prove things about our handshake protocol more
817 - Make directory authorities generate a separate "guard" flag to
818 mean "would make a good entry guard". Clients now honor the
819 is_guard flag rather than looking at is_fast or is_stable.
820 - Try to list MyFamily elements by key, not by nickname, and warn
821 if we've not heard of a server.
822 - Start using RAND_bytes rather than RAND_pseudo_bytes from
823 OpenSSL. Also, reseed our entropy every hour, not just at
824 startup. And add entropy in 512-bit chunks, not 160-bit chunks.
825 - Refuse server descriptors where the fingerprint line doesn't match
826 the included identity key. Tor doesn't care, but other apps (and
827 humans) might actually be trusting the fingerprint line.
828 - We used to kill the circuit when we receive a relay command we
829 don't recognize. Now we just drop that cell.
830 - Fix a bug found by Lasse Overlier: when we were making internal
831 circuits (intended to be cannibalized later for rendezvous and
832 introduction circuits), we were picking them so that they had
833 useful exit nodes. There was no need for this, and it actually
834 aids some statistical attacks.
835 - Start treating internal circuits and exit circuits separately.
836 It's important to keep them separate because internal circuits
837 have their last hops picked like middle hops, rather than like
838 exit hops. So exiting on them will break the user's expectations.
839 - Fix a possible way to DoS dirservers.
840 - When the client asked for a rendezvous port that the hidden
841 service didn't want to provide, we were sending an IP address
842 back along with the end cell. Fortunately, it was zero. But stop
845 o Packaging improvements:
846 - Implement --with-libevent-dir option to ./configure. Improve
847 search techniques to find libevent, and use those for openssl too.
848 - Fix a couple of bugs in OpenSSL detection. Deal better when
849 there are multiple SSLs installed with different versions.
850 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
851 - On non-gcc compilers (e.g. Solaris's cc), use "-g -O" instead of
853 - Make unit tests (and other invocations that aren't the real Tor)
854 run without launching listeners, creating subdirectories, and so on.
855 - The OS X installer was adding a symlink for tor_resolve but
856 the binary was called tor-resolve (reported by Thomas Hardly).
857 - Now we can target arch and OS in rpm builds (contributed by
858 Phobos). Also make the resulting dist-rpm filename match the
860 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
861 if you log to syslog and want something other than LOG_DAEMON.
862 - Fix the torify (tsocks) config file to not use Tor for localhost
864 - Start shipping socks-extensions.txt, tor-doc-unix.html,
865 tor-doc-server.html, and stylesheet.css in the tarball.
866 - Stop shipping tor-doc.html, INSTALL, and README in the tarball.
867 They are useless now.
868 - Add Peter Palfrader's contributed check-tor script. It lets you
869 easily check whether a given server (referenced by nickname)
871 - Add BSD-style contributed startup script "rc.subr" from Peter
874 o Directory improvements -- new directory protocol:
875 - See tor/doc/dir-spec.txt for all the juicy details. Key points:
876 - Authorities and caches publish individual descriptors (by
877 digest, by fingerprint, by "all", and by "tell me yours").
878 - Clients don't download or use the old directory anymore. Now they
879 download network-statuses from the directory authorities, and
880 fetch individual server descriptors as needed from mirrors.
881 - Clients don't download descriptors of non-running servers.
882 - Download descriptors by digest, not by fingerprint. Caches try to
883 download all listed digests from authorities; clients try to
884 download "best" digests from caches. This avoids partitioning
885 and isolating attacks better.
886 - Only upload a new server descriptor when options change, 18
887 hours have passed, uptime is reset, or bandwidth changes a lot.
888 - Directory authorities silently throw away new descriptors that
889 haven't changed much if the timestamps are similar. We do this to
890 tolerate older Tor servers that upload a new descriptor every 15
891 minutes. (It seemed like a good idea at the time.)
892 - Clients choose directory servers from the network status lists,
893 not from their internal list of router descriptors. Now they can
894 go to caches directly rather than needing to go to authorities
895 to bootstrap the first set of descriptors.
896 - When picking a random directory, prefer non-authorities if any
898 - Add a new flag to network-status indicating whether the server
899 can answer v2 directory requests too.
900 - Directory mirrors now cache up to 16 unrecognized network-status
901 docs, so new directory authorities will be cached too.
902 - Stop parsing, storing, or using running-routers output (but
903 mirrors still cache and serve it).
904 - Clients consider a threshold of "versioning" directory authorities
905 before deciding whether to warn the user that he's obsolete.
906 - Authorities publish separate sorted lists of recommended versions
907 for clients and for servers.
908 - Change DirServers config line to note which dirs are v1 authorities.
909 - Put nicknames on the DirServer line, so we can refer to them
910 without requiring all our users to memorize their IP addresses.
911 - Remove option when getting directory cache to see whether they
912 support running-routers; they all do now. Replace it with one
913 to see whether caches support v2 stuff.
914 - Stop listing down or invalid nodes in the v1 directory. This
915 reduces its bulk by about 1/3, and reduces load on mirrors.
916 - Mirrors no longer cache the v1 directory as often.
917 - If we as a directory mirror don't know of any v1 directory
918 authorities, then don't try to cache any v1 directories.
920 o Other directory improvements:
921 - Add lefkada.eecs.harvard.edu and tor.dizum.com as fourth and
922 fifth authoritative directory servers.
923 - Directory authorities no longer require an open connection from
924 a server to consider him "reachable". We need this change because
925 when we add new directory authorities, old servers won't know not
927 - Dir authorities now do their own external reachability testing
928 of each server, and only list as running the ones they found to
929 be reachable. We also send back warnings to the server's logs if
930 it uploads a descriptor that we already believe is unreachable.
931 - Spread the directory authorities' reachability testing over the
932 entire testing interval, so we don't try to do 500 TLS's at once
934 - Make the "stable" router flag in network-status be the median of
935 the uptimes of running valid servers, and make clients pay
936 attention to the network-status flags. Thus the cutoff adapts
937 to the stability of the network as a whole, making IRC, IM, etc
938 connections more reliable.
939 - Make the v2 dir's "Fast" flag based on relative capacity, just
940 like "Stable" is based on median uptime. Name everything in the
941 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
942 - Retry directory requests if we fail to get an answer we like
943 from a given dirserver (we were retrying before, but only if
945 - Return a robots.txt on our dirport to discourage google indexing.
947 o Controller protocol improvements:
948 - Revised controller protocol (version 1) that uses ascii rather
949 than binary: tor/doc/control-spec.txt. Add supporting libraries
950 in python and java and c# so you can use the controller from your
951 applications without caring how our protocol works.
952 - Allow the DEBUG controller event to work again. Mark certain log
953 entries as "don't tell this to controllers", so we avoid cycles.
954 - New controller function "getinfo accounting", to ask how
955 many bytes we've used in this time period.
956 - Add a "resetconf" command so you can set config options like
957 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
958 a config option in the torrc with no value, then it clears it
959 entirely (rather than setting it to its default).
960 - Add a "getinfo config-file" to tell us where torrc is. Also
961 expose guard nodes, config options/names.
962 - Add a "quit" command (when when using the controller manually).
963 - Add a new signal "newnym" to "change pseudonyms" -- that is, to
964 stop using any currently-dirty circuits for new streams, so we
965 don't link new actions to old actions. This also occurs on HUP
967 - If we would close a stream early (e.g. it asks for a .exit that
968 we know would refuse it) but the LeaveStreamsUnattached config
969 option is set by the controller, then don't close it.
970 - Add a new controller event type "authdir_newdescs" that allows
971 controllers to get all server descriptors that were uploaded to
972 a router in its role as directory authority.
973 - New controller option "getinfo desc/all-recent" to fetch the
974 latest server descriptor for every router that Tor knows about.
975 - Fix the controller's "attachstream 0" command to treat conn like
976 it just connected, doing address remapping, handling .exit and
977 .onion idioms, and so on. Now we're more uniform in making sure
978 that the controller hears about new and closing connections.
979 - Permit transitioning from ORPort==0 to ORPort!=0, and back, from
980 the controller. Also, rotate dns and cpu workers if the controller
981 changes options that will affect them; and initialize the dns
982 worker cache tree whether or not we start out as a server.
983 - Add a new circuit purpose 'controller' to let the controller ask
984 for a circuit that Tor won't try to use. Extend the "extendcircuit"
985 controller command to let you specify the purpose if you're starting
986 a new circuit. Add a new "setcircuitpurpose" controller command to
987 let you change a circuit's purpose after it's been created.
988 - Let the controller ask for "getinfo dir/server/foo" so it can ask
989 directly rather than connecting to the dir port. "getinfo
990 dir/status/foo" also works, but currently only if your DirPort
992 - Let the controller tell us about certain router descriptors
993 that it doesn't want Tor to use in circuits. Implement
994 "setrouterpurpose" and modify "+postdescriptor" to do this.
995 - If the controller's *setconf commands fail, collect an error
996 message in a string and hand it back to the controller -- don't
997 just tell them to go read their logs.
999 o Scalability, resource management, and performance:
1000 - Fix a major load balance bug: we were round-robin reading in 16 KB
1001 chunks, and servers with bandwidthrate of 20 KB, while downloading
1002 a 600 KB directory, would starve their other connections. Now we
1003 try to be a bit more fair.
1004 - Be more conservative about whether to advertise our DirPort.
1005 The main change is to not advertise if we're running at capacity
1006 and either a) we could hibernate ever or b) our capacity is low
1007 and we're using a default DirPort.
1008 - We weren't cannibalizing circuits correctly for
1009 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
1010 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
1011 build those from scratch. This should make hidden services faster.
1012 - Predict required circuits better, with an eye toward making hidden
1013 services faster on the service end.
1014 - Compress exit policies even more: look for duplicate lines and
1016 - Generate 18.0.0.0/8 address policy format in descs when we can;
1017 warn when the mask is not reducible to a bit-prefix.
1018 - There used to be two ways to specify your listening ports in a
1019 server descriptor: on the "router" line and with a separate "ports"
1020 line. Remove support for the "ports" line.
1021 - Reduce memory requirements in our structs by changing the order
1022 of fields. Replace balanced trees with hash tables. Inline
1023 bottleneck smartlist functions. Add a "Map from digest to void*"
1024 abstraction so we can do less hex encoding/decoding, and use it
1025 in router_get_by_digest(). Many other CPU and memory improvements.
1026 - Allow tor_gzip_uncompress to extract as much as possible from
1027 truncated compressed data. Try to extract as many
1028 descriptors as possible from truncated http responses (when
1029 purpose is DIR_PURPOSE_FETCH_ROUTERDESC).
1030 - Make circ->onionskin a pointer, not a static array. moria2 was using
1031 125000 circuit_t's after it had been up for a few weeks, which
1032 translates to 20+ megs of wasted space.
1033 - The private half of our EDH handshake keys are now chosen out
1034 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
1035 - Stop doing the complex voodoo overkill checking for insecure
1036 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
1037 - Do round-robin writes for TLS of at most 16 kB per write. This
1038 might be more fair on loaded Tor servers.
1039 - Do not use unaligned memory access on alpha, mips, or mipsel.
1040 It *works*, but is very slow, so we treat them as if it doesn't.
1042 o Other bugfixes and improvements:
1043 - Start storing useful information to $DATADIR/state, so we can
1044 remember things across invocations of Tor. Retain unrecognized
1045 lines so we can be forward-compatible, and write a TorVersion line
1046 so we can be backward-compatible.
1047 - If ORPort is set, Address is not explicitly set, and our hostname
1048 resolves to a private IP address, try to use an interface address
1049 if it has a public address. Now Windows machines that think of
1050 themselves as localhost can guess their address.
1051 - Regenerate our local descriptor if it's dirty and we try to use
1052 it locally (e.g. if it changes during reachability detection).
1053 This was causing some Tor servers to keep publishing the same
1054 initial descriptor forever.
1055 - Tor servers with dynamic IP addresses were needing to wait 18
1056 hours before they could start doing reachability testing using
1057 the new IP address and ports. This is because they were using
1058 the internal descriptor to learn what to test, yet they were only
1059 rebuilding the descriptor once they decided they were reachable.
1060 - It turns out we couldn't bootstrap a network since we added
1061 reachability detection in 0.1.0.1-rc. Good thing the Tor network
1062 has never gone down. Add an AssumeReachable config option to let
1063 servers and authorities bootstrap. When we're trying to build a
1064 high-uptime or high-bandwidth circuit but there aren't enough
1065 suitable servers, try being less picky rather than simply failing.
1066 - Newly bootstrapped Tor networks couldn't establish hidden service
1067 circuits until they had nodes with high uptime. Be more tolerant.
1068 - Really busy servers were keeping enough circuits open on stable
1069 connections that they were wrapping around the circuit_id
1070 space. (It's only two bytes.) This exposed a bug where we would
1071 feel free to reuse a circuit_id even if it still exists but has
1072 been marked for close. Try to fix this bug. Some bug remains.
1073 - When we fail to bind or listen on an incoming or outgoing
1074 socket, we now close it before refusing, rather than just
1075 leaking it. (Thanks to Peter Palfrader for finding.)
1076 - Fix a file descriptor leak in start_daemon().
1077 - On Windows, you can't always reopen a port right after you've
1078 closed it. So change retry_listeners() to only close and re-open
1079 ports that have changed.
1080 - Workaround a problem with some http proxies that refuse GET
1081 requests that specify "Content-Length: 0". Reported by Adrian.
1082 - Recover better from TCP connections to Tor servers that are
1083 broken but don't tell you (it happens!); and rotate TLS
1084 connections once a week.
1085 - Fix a scary-looking but apparently harmless bug where circuits
1086 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1087 servers, and never switch to state CIRCUIT_STATE_OPEN.
1088 - Check for even more Windows version flags when writing the platform
1089 string in server descriptors, and note any we don't recognize.
1090 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1091 get a better idea of why their circuits failed. Not used yet.
1092 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
1093 We don't use them yet, but maybe one day our DNS resolver will be
1094 able to discover them.
1095 - Let people type "tor --install" as well as "tor -install" when they
1096 want to make it an NT service.
1097 - Looks like we were never delivering deflated (i.e. compressed)
1098 running-routers lists, even when asked. Oops.
1099 - We were leaking some memory every time the client changed IPs.
1100 - Clean up more of the OpenSSL memory when exiting, so we can detect
1101 memory leaks better.
1102 - Never call free() on tor_malloc()d memory. This will help us
1103 use dmalloc to detect memory leaks.
1104 - Some Tor servers process billions of cells per day. These
1105 statistics are now uint64_t's.
1106 - Check [X-]Forwarded-For headers in HTTP requests when generating
1107 log messages. This lets people run dirservers (and caches) behind
1108 Apache but still know which IP addresses are causing warnings.
1109 - Fix minor integer overflow in calculating when we expect to use up
1110 our bandwidth allocation before hibernating.
1111 - Lower the minimum required number of file descriptors to 1000,
1112 so we can have some overhead for Valgrind on Linux, where the
1113 default ulimit -n is 1024.
1114 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
1115 and its existence is confusing some users.
1117 o Config option fixes:
1118 - Add a new config option ExitPolicyRejectPrivate which defaults
1119 to on. Now all exit policies will begin with rejecting private
1120 addresses, unless the server operator explicitly turns it off.
1121 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB.
1122 - Add new ReachableORAddresses and ReachableDirAddresses options
1123 that understand address policies. FascistFirewall is now a synonym
1124 for "ReachableORAddresses *:443", "ReachableDirAddresses *:80".
1125 - Start calling it FooListenAddress rather than FooBindAddress,
1126 since few of our users know what it means to bind an address
1128 - If the user gave Tor an odd number of command-line arguments,
1129 we were silently ignoring the last one. Now we complain and fail.
1130 This wins the oldest-bug prize -- this bug has been present since
1131 November 2002, as released in Tor 0.0.0.
1132 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
1133 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
1134 it would silently ignore the 6668.
1135 - If we get a linelist or linelist_s config option from the torrc,
1136 e.g. ExitPolicy, and it has no value, warn and skip rather than
1137 silently resetting it to its default.
1138 - Setconf was appending items to linelists, not clearing them.
1139 - Add MyFamily to torrc.sample in the server section, so operators
1140 will be more likely to learn that it exists.
1141 - Make ContactInfo mandatory for authoritative directory servers.
1142 - MaxConn has been obsolete for a while now. Document the ConnLimit
1143 config option, which is a *minimum* number of file descriptors
1144 that must be available else Tor refuses to start.
1145 - Get rid of IgnoreVersion undocumented config option, and make us
1146 only warn, never exit, when we're running an obsolete version.
1147 - Make MonthlyAccountingStart config option truly obsolete now.
1148 - Correct the man page entry on TrackHostExitsExpire.
1149 - Let directory authorities start even if they don't specify an
1150 Address config option.
1151 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1152 reflect the updated flags in our v2 dir protocol.
1154 o Config option features:
1155 - Add a new config option FastFirstHopPK (on by default) so clients
1156 do a trivial crypto handshake for their first hop, since TLS has
1157 already taken care of confidentiality and authentication.
1158 - Let the user set ControlListenAddress in the torrc. This can be
1159 dangerous, but there are some cases (like a secured LAN) where it
1161 - New config options to help controllers: FetchServerDescriptors
1162 and FetchHidServDescriptors for whether to fetch server
1163 info and hidserv info or let the controller do it, and
1164 PublishServerDescriptor and PublishHidServDescriptors.
1165 - Also let the controller set the __AllDirActionsPrivate config
1166 option if you want all directory fetches/publishes to happen via
1167 Tor (it assumes your controller bootstraps your circuits).
1168 - Add "HardwareAccel" config option: support for crypto hardware
1169 accelerators via OpenSSL. Off by default, until we find somebody
1170 smart who can test it for us. (It appears to produce seg faults
1171 in at least some cases.)
1172 - New config option "AuthDirRejectUnlisted" for directory authorities
1173 as a panic button: if we get flooded with unusable servers we can
1174 revert to only listing servers in the approved-routers file.
1175 - Directory authorities can now reject/invalidate by key and IP,
1176 with the config options "AuthDirInvalid" and "AuthDirReject", or
1177 by marking a fingerprint as "!reject" or "!invalid" (as its
1178 nickname) in the approved-routers file. This is useful since
1179 currently we automatically list servers as running and usable
1180 even if we know they're jerks.
1181 - Add a new config option TestSocks so people can see whether their
1182 applications are using socks4, socks4a, socks5-with-ip, or
1183 socks5-with-fqdn. This way they don't have to keep mucking
1184 with tcpdump and wondering if something got cached somewhere.
1185 - Add "private:*" as an alias in configuration for policies. Now
1186 you can simplify your exit policy rather than needing to list
1187 every single internal or nonroutable network space.
1188 - Accept "private:*" in routerdesc exit policies; not generated yet
1189 because older Tors do not understand it.
1190 - Add configuration option "V1AuthoritativeDirectory 1" which
1191 moria1, moria2, and tor26 have set.
1192 - Implement an option, VirtualAddrMask, to set which addresses
1193 get handed out in response to mapaddress requests. This works
1194 around a bug in tsocks where 127.0.0.0/8 is never socksified.
1195 - Add a new config option FetchUselessDescriptors, off by default,
1196 for when you plan to run "exitlist" on your client and you want
1197 to know about even the non-running descriptors.
1198 - SocksTimeout: How long do we let a socks connection wait
1199 unattached before we fail it?
1200 - CircuitBuildTimeout: Cull non-open circuits that were born
1201 at least this many seconds ago.
1202 - CircuitIdleTimeout: Cull open clean circuits that were born
1203 at least this many seconds ago.
1204 - New config option SafeSocks to reject all application connections
1205 using unsafe socks protocols. Defaults to off.
1207 o Improved and clearer log messages:
1208 - Reduce clutter in server logs. We're going to try to make
1209 them actually usable now. New config option ProtocolWarnings that
1210 lets you hear about how _other Tors_ are breaking the protocol. Off
1212 - Divide log messages into logging domains. Once we put some sort
1213 of interface on this, it will let people looking at more verbose
1214 log levels specify the topics they want to hear more about.
1215 - Log server fingerprint on startup, so new server operators don't
1216 have to go hunting around their filesystem for it.
1217 - Provide dire warnings to any users who set DirServer manually;
1218 move it out of torrc.sample and into torrc.complete.
1219 - Make the log message less scary when all the dirservers are
1220 temporarily unreachable.
1221 - When tor_socketpair() fails in Windows, give a reasonable
1222 Windows-style errno back.
1223 - Improve tor_gettimeofday() granularity on windows.
1224 - We were printing the number of idle dns workers incorrectly when
1226 - Handle duplicate lines in approved-routers files without warning.
1227 - We were whining about using socks4 or socks5-with-local-lookup
1228 even when it's an IP address in the "virtual" range we designed
1229 exactly for this case.
1230 - Check for named servers when looking them up by nickname;
1231 warn when we're calling a non-named server by its nickname;
1232 don't warn twice about the same name.
1233 - Downgrade the dirserver log messages when whining about
1235 - Correct "your server is reachable" log entries to indicate that
1236 it was self-testing that told us so.
1237 - If we're trying to be a Tor server and running Windows 95/98/ME
1238 as a server, explain that we'll likely crash.
1239 - Provide a more useful warn message when our onion queue gets full:
1240 the CPU is too slow or the exit policy is too liberal.
1241 - Don't warn when we receive a 503 from a dirserver/cache -- this
1242 will pave the way for them being able to refuse if they're busy.
1243 - When we fail to bind a listener, try to provide a more useful
1244 log message: e.g., "Is Tor already running?"
1245 - Only start testing reachability once we've established a
1246 circuit. This will make startup on dir authorities less noisy.
1247 - Don't try to upload hidden service descriptors until we have
1248 established a circuit.
1249 - Tor didn't warn when it failed to open a log file.
1250 - Warn when listening on a public address for socks. We suspect a
1251 lot of people are setting themselves up as open socks proxies,
1252 and they have no idea that jerks on the Internet are using them,
1253 since they simply proxy the traffic into the Tor network.
1254 - Give a useful message when people run Tor as the wrong user,
1255 rather than telling them to start chowning random directories.
1256 - Fix a harmless bug that was causing Tor servers to log
1257 "Got an end because of misc error, but we're not an AP. Closing."
1258 - Fix wrong log message when you add a "HiddenServiceNodes" config
1259 line without any HiddenServiceDir line (reported by Chris Thomas).
1260 - Directory authorities now stop whining so loudly about bad
1261 descriptors that they fetch from other dirservers. So when there's
1262 a log complaint, it's for sure from a freshly uploaded descriptor.
1263 - When logging via syslog, include the pid whenever we provide
1264 a log entry. Suggested by Todd Fries.
1265 - When we're shutting down and we do something like try to post a
1266 server descriptor or rendezvous descriptor, don't complain that
1267 we seem to be unreachable. Of course we are, we're shutting down.
1268 - Change log line for unreachability to explicitly suggest /etc/hosts
1269 as the culprit. Also make it clearer what IP address and ports we're
1270 testing for reachability.
1271 - Put quotes around user-supplied strings when logging so users are
1272 more likely to realize if they add bad characters (like quotes)
1274 - NT service patch from Matt Edman to improve error messages on Win32.
1277 Changes in version 0.1.0.17 - 2006-02-17
1278 o Crash bugfixes on 0.1.0.x:
1279 - When servers with a non-zero DirPort came out of hibernation,
1280 sometimes they would trigger an assert.
1282 o Other important bugfixes:
1283 - On platforms that don't have getrlimit (like Windows), we were
1284 artificially constraining ourselves to a max of 1024
1285 connections. Now just assume that we can handle as many as 15000
1286 connections. Hopefully this won't cause other problems.
1288 o Backported features:
1289 - When we're a server, a client asks for an old-style directory,
1290 and our write bucket is empty, don't give it to him. This way
1291 small servers can continue to serve the directory *sometimes*,
1292 without getting overloaded.
1293 - Whenever you get a 503 in response to a directory fetch, try
1294 once more. This will become important once servers start sending
1295 503's whenever they feel busy.
1296 - Fetch a new directory every 120 minutes, not every 40 minutes.
1297 Now that we have hundreds of thousands of users running the old
1298 directory algorithm, it's starting to hurt a lot.
1299 - Bump up the period for forcing a hidden service descriptor upload
1300 from 20 minutes to 1 hour.
1303 Changes in version 0.1.0.16 - 2006-01-02
1304 o Crash bugfixes on 0.1.0.x:
1305 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1306 corrupting the heap, losing FDs, or crashing when we need to resize
1307 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1308 - It turns out sparc64 platforms crash on unaligned memory access
1309 too -- so detect and avoid this.
1310 - Handle truncated compressed data correctly (by detecting it and
1312 - Fix possible-but-unlikely free(NULL) in control.c.
1313 - When we were closing connections, there was a rare case that
1314 stomped on memory, triggering seg faults and asserts.
1315 - Avoid potential infinite recursion when building a descriptor. (We
1316 don't know that it ever happened, but better to fix it anyway.)
1317 - We were neglecting to unlink marked circuits from soon-to-close OR
1318 connections, which caused some rare scribbling on freed memory.
1319 - Fix a memory stomping race bug when closing the joining point of two
1320 rendezvous circuits.
1321 - Fix an assert in time parsing found by Steven Murdoch.
1323 o Other bugfixes on 0.1.0.x:
1324 - When we're doing reachability testing, provide more useful log
1325 messages so the operator knows what to expect.
1326 - Do not check whether DirPort is reachable when we are suppressing
1327 advertising it because of hibernation.
1328 - When building with -static or on Solaris, we sometimes needed -ldl.
1329 - One of the dirservers (tor26) changed its IP address.
1330 - When we're deciding whether a stream has enough circuits around
1331 that can handle it, count the freshly dirty ones and not the ones
1332 that are so dirty they won't be able to handle it.
1333 - When we're expiring old circuits, we had a logic error that caused
1334 us to close new rendezvous circuits rather than old ones.
1335 - Give a more helpful log message when you try to change ORPort via
1336 the controller: you should upgrade Tor if you want that to work.
1337 - We were failing to parse Tor versions that start with "Tor ".
1338 - Tolerate faulty streams better: when a stream fails for reason
1339 exitpolicy, stop assuming that the router is lying about his exit
1340 policy. When a stream fails for reason misc, allow it to retry just
1341 as if it was resolvefailed. When a stream has failed three times,
1342 reset its failure count so we can try again and get all three tries.
1345 Changes in version 0.1.0.15 - 2005-09-23
1346 o Bugfixes on 0.1.0.x:
1347 - Reject ports 465 and 587 (spam targets) in default exit policy.
1348 - Don't crash when we don't have any spare file descriptors and we
1349 try to spawn a dns or cpu worker.
1350 - Get rid of IgnoreVersion undocumented config option, and make us
1351 only warn, never exit, when we're running an obsolete version.
1352 - Don't try to print a null string when your server finds itself to
1353 be unreachable and the Address config option is empty.
1354 - Make the numbers in read-history and write-history into uint64s,
1355 so they don't overflow and publish negatives in the descriptor.
1356 - Fix a minor memory leak in smartlist_string_remove().
1357 - We were only allowing ourselves to upload a server descriptor at
1358 most every 20 minutes, even if it changed earlier than that.
1359 - Clean up log entries that pointed to old URLs.
1362 Changes in version 0.1.0.14 - 2005-08-08
1363 o Bugfixes on 0.1.0.x:
1364 - Fix the other half of the bug with crypto handshakes
1366 - Fix an assert trigger if you send a 'signal term' via the
1367 controller when it's listening for 'event info' messages.
1370 Changes in version 0.1.0.13 - 2005-08-04
1371 o Bugfixes on 0.1.0.x:
1372 - Fix a critical bug in the security of our crypto handshakes.
1373 - Fix a size_t underflow in smartlist_join_strings2() that made
1374 it do bad things when you hand it an empty smartlist.
1375 - Fix Windows installer to ship Tor license (thanks to Aphex for
1376 pointing out this oversight) and put a link to the doc directory
1378 - Explicitly set no-unaligned-access for sparc: it turns out the
1379 new gcc's let you compile broken code, but that doesn't make it
1383 Changes in version 0.1.0.12 - 2005-07-18
1384 o New directory servers:
1385 - tor26 has changed IP address.
1387 o Bugfixes on 0.1.0.x:
1388 - Fix a possible double-free in tor_gzip_uncompress().
1389 - When --disable-threads is set, do not search for or link against
1391 - Don't trigger an assert if an authoritative directory server
1392 claims its dirport is 0.
1393 - Fix bug with removing Tor as an NT service: some people were
1394 getting "The service did not return an error." Thanks to Matt
1398 Changes in version 0.1.0.11 - 2005-06-30
1399 o Bugfixes on 0.1.0.x:
1400 - Fix major security bug: servers were disregarding their
1401 exit policies if clients behaved unexpectedly.
1402 - Make OS X init script check for missing argument, so we don't
1403 confuse users who invoke it incorrectly.
1404 - Fix a seg fault in "tor --hash-password foo".
1405 - The MAPADDRESS control command was broken.
1408 Changes in version 0.1.0.10 - 2005-06-14
1410 - Make NT services work and start on startup on Win32 (based on
1411 patch by Matt Edman). See the FAQ entry for details.
1412 - Make 'platform' string in descriptor more accurate for Win32
1413 servers, so it's not just "unknown platform".
1414 - REUSEADDR on normal platforms means you can rebind to the port
1415 right after somebody else has let it go. But REUSEADDR on Win32
1416 means you can bind to the port _even when somebody else already
1417 has it bound_! So, don't do that on Win32.
1418 - Clean up the log messages when starting on Win32 with no config
1420 - Allow seeding the RNG on Win32 even when you're not running as
1421 Administrator. If seeding the RNG on Win32 fails, quit.
1423 o Assert / crash bugs:
1424 - Refuse relay cells that claim to have a length larger than the
1425 maximum allowed. This prevents a potential attack that could read
1426 arbitrary memory (e.g. keys) from an exit server's process
1428 - If unofficial Tor clients connect and send weird TLS certs, our
1429 Tor server triggers an assert. Stop asserting, and start handling
1430 TLS errors better in other situations too.
1431 - Fix a race condition that can trigger an assert when we have a
1432 pending create cell and an OR connection attempt fails.
1435 - Use pthreads for worker processes rather than forking. This was
1436 forced because when we forked, we ended up wasting a lot of
1437 duplicate ram over time.
1438 - Also switch to foo_r versions of some library calls to allow
1439 reentry and threadsafeness.
1440 - Implement --disable-threads configure option. Disable threads on
1441 netbsd and openbsd by default, because they have no reentrant
1442 resolver functions (!), and on solaris since it has other
1444 - Fix possible bug on threading platforms (e.g. win32) which was
1445 leaking a file descriptor whenever a cpuworker or dnsworker died.
1446 - Fix a minor memory leak when somebody establishes an introduction
1447 point at your Tor server.
1448 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1450 - Add ./configure --with-dmalloc option, to track memory leaks.
1451 - And try to free all memory on closing, so we can detect what
1454 o Protocol correctness:
1455 - When we've connected to an OR and handshaked but didn't like
1456 the result, we were closing the conn without sending destroy
1457 cells back for pending circuits. Now send those destroys.
1458 - Start sending 'truncated' cells back rather than destroy cells
1459 if the circuit closes in front of you. This means we won't have
1460 to abandon partially built circuits.
1461 - Handle changed router status correctly when dirserver reloads
1462 fingerprint file. We used to be dropping all unverified descriptors
1463 right then. The bug was hidden because we would immediately
1464 fetch a directory from another dirserver, which would include the
1465 descriptors we just dropped.
1466 - Revise tor-spec to add more/better stream end reasons.
1467 - Revise all calls to connection_edge_end to avoid sending 'misc',
1468 and to take errno into account where possible.
1469 - Client now retries when streams end early for 'hibernating' or
1470 'resource limit' reasons, rather than failing them.
1471 - Try to be more zealous about calling connection_edge_end when
1472 things go bad with edge conns in connection.c.
1474 o Robustness improvements:
1475 - Better handling for heterogeneous / unreliable nodes:
1476 - Annotate circuits with whether they aim to contain high uptime
1477 nodes and/or high capacity nodes. When building circuits, choose
1479 - This means that every single node in an intro rend circuit,
1480 not just the last one, will have a minimum uptime.
1481 - New config option LongLivedPorts to indicate application streams
1482 that will want high uptime circuits.
1483 - Servers reset uptime when a dir fetch entirely fails. This
1484 hopefully reflects stability of the server's network connectivity.
1485 - If somebody starts his tor server in Jan 2004 and then fixes his
1486 clock, don't make his published uptime be a year.
1487 - Reset published uptime when we wake up from hibernation.
1488 - Introduce a notion of 'internal' circs, which are chosen without
1489 regard to the exit policy of the last hop. Intro and rendezvous
1490 circs must be internal circs, to avoid leaking information. Resolve
1491 and connect streams can use internal circs if they want.
1492 - New circuit pooling algorithm: keep track of what destination ports
1493 we've used recently (start out assuming we'll want to use 80), and
1494 make sure to have enough circs around to satisfy these ports. Also
1495 make sure to have 2 internal circs around if we've required internal
1496 circs lately (and with high uptime if we've seen that lately too).
1497 - Turn addr_policy_compare from a tristate to a quadstate; this should
1498 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1499 for google.com" problem.
1500 - When a client asks us for a dir mirror and we don't have one,
1501 launch an attempt to get a fresh one.
1502 - First cut at support for "create-fast" cells. Clients can use
1503 these when extending to their first hop, since the TLS already
1504 provides forward secrecy and authentication. Not enabled on
1507 o Reachability testing.
1508 - Your Tor server will automatically try to see if its ORPort and
1509 DirPort are reachable from the outside, and it won't upload its
1510 descriptor until it decides at least ORPort is reachable (when
1511 DirPort is not yet found reachable, publish it as zero).
1512 - When building testing circs for ORPort testing, use only
1513 high-bandwidth nodes, so fewer circuits fail.
1514 - Notice when our IP changes, and reset stats/uptime/reachability.
1515 - Authdirservers don't do ORPort reachability detection, since
1516 they're in clique mode, so it will be rare to find a server not
1517 already connected to them.
1518 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1522 - Now we allow two unverified servers with the same nickname
1523 but different keys. But if a nickname is verified, only that
1524 nickname+key are allowed.
1525 - If you're an authdirserver connecting to an address:port,
1526 and it's not the OR you were expecting, forget about that
1527 descriptor. If he *was* the one you were expecting, then forget
1528 about all other descriptors for that address:port.
1529 - Allow servers to publish descriptors from 12 hours in the future.
1530 Corollary: only whine about clock skew from the dirserver if
1531 he's a trusted dirserver (since now even verified servers could
1532 have quite wrong clocks).
1533 - Require servers that use the default dirservers to have public IP
1534 addresses. We have too many servers that are configured with private
1535 IPs and their admins never notice the log entries complaining that
1536 their descriptors are being rejected.
1538 o Efficiency improvements:
1539 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1540 and /dev/poll), and hopefully work better on Windows too.
1541 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1542 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1543 - Find libevent even if it's hiding in /usr/local/ and your
1544 CFLAGS and LDFLAGS don't tell you to look there.
1545 - Be able to link with libevent as a shared library (the default
1546 after 1.0d), even if it's hiding in /usr/local/lib and even
1547 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1548 assuming you're running gcc. Otherwise fail and give a useful
1550 - Switch to a new buffer management algorithm, which tries to avoid
1551 reallocing and copying quite as much. In first tests it looks like
1552 it uses *more* memory on average, but less cpu.
1553 - Switch our internal buffers implementation to use a ring buffer,
1554 to hopefully improve performance for fast servers a lot.
1555 - Reenable the part of the code that tries to flush as soon as an
1556 OR outbuf has a full TLS record available. Perhaps this will make
1557 OR outbufs not grow as huge except in rare cases, thus saving lots
1558 of CPU time plus memory.
1559 - Improve performance for dirservers: stop re-parsing the whole
1560 directory every time you regenerate it.
1561 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1562 it much faster to look up a circuit for each relay cell.
1563 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1564 since they're eating our cpu on exit nodes.
1565 - Stop wasting time doing a case insensitive comparison for every
1566 dns name every time we do any lookup. Canonicalize the names to
1567 lowercase when you first see them.
1570 - Handle unavailable hidden services better. Handle slow or busy
1571 hidden services better.
1572 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1573 circ as necessary, if there are any completed ones lying around
1574 when we try to launch one.
1575 - Make hidden services try to establish a rendezvous for 30 seconds
1576 after fetching the descriptor, rather than for n (where n=3)
1577 attempts to build a circuit.
1578 - Adjust maximum skew and age for rendezvous descriptors: let skew
1579 be 48 hours rather than 90 minutes.
1580 - Reject malformed .onion addresses rather then passing them on as
1581 normal web requests.
1584 - More Tor controller support. See
1585 http://tor.eff.org/doc/control-spec.txt for all the new features,
1586 including signals to emulate unix signals from any platform;
1587 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1588 closestream; closecircuit; etc.
1589 - Encode hashed controller passwords in hex instead of base64,
1590 to make it easier to write controllers.
1591 - Revise control spec and implementation to allow all log messages to
1592 be sent to controller with their severities intact (suggested by
1593 Matt Edman). Disable debug-level logs while delivering a debug-level
1594 log to the controller, to prevent loop. Update TorControl to handle
1595 new log event types.
1597 o New config options/defaults:
1598 - Begin scrubbing sensitive strings from logs by default. Turn off
1599 the config option SafeLogging if you need to do debugging.
1600 - New exit policy: accept most low-numbered ports, rather than
1601 rejecting most low-numbered ports.
1602 - Put a note in the torrc about abuse potential with the default
1604 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1606 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1607 based on patch from Adam Langley (basic auth only).
1608 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1609 the fast servers that have been joining lately. (Clients are now
1610 willing to load balance over up to 2 MB of advertised bandwidth
1612 - New config option MaxAdvertisedBandwidth which lets you advertise
1613 a low bandwidthrate (to not attract as many circuits) while still
1614 allowing a higher bandwidthrate in reality.
1615 - Require BandwidthRate to be at least 20kB/s for servers.
1616 - Add a NoPublish config option, so you can be a server (e.g. for
1617 testing running Tor servers in other Tor networks) without
1618 publishing your descriptor to the primary dirservers.
1619 - Add a new AddressMap config directive to rewrite incoming socks
1620 addresses. This lets you, for example, declare an implicit
1621 required exit node for certain sites.
1622 - Add a new TrackHostExits config directive to trigger addressmaps
1623 for certain incoming socks addresses -- for sites that break when
1624 your exit keeps changing (based on patch from Mike Perry).
1625 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1626 which describes how often we retry making new circuits if current
1627 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1628 how long we're willing to make use of an already-dirty circuit.
1629 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1630 a config option "ShutdownWaitLength" (when using kill -INT on
1632 - Fix an edge case in parsing config options: if they say "--"
1633 on the commandline, it's not a config option (thanks weasel).
1634 - New config option DirAllowPrivateAddresses for authdirservers.
1635 Now by default they refuse router descriptors that have non-IP or
1636 private-IP addresses.
1637 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1638 smart" default value: low for servers and high for clients.
1639 - Some people were putting "Address " in their torrc, and they had
1640 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1641 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1642 LOCALSTATEDIR/tor instead.
1643 - Implement --verify-config command-line option to check if your torrc
1644 is valid without actually launching Tor.
1646 o Logging improvements:
1647 - When dirservers refuse a server descriptor, we now log its
1648 contactinfo, platform, and the poster's IP address.
1649 - Only warn once per nickname from add_nickname_list_to_smartlist()
1650 per failure, so an entrynode or exitnode choice that's down won't
1652 - When we're connecting to an OR and he's got a different nickname/key
1653 than we were expecting, only complain loudly if we're an OP or a
1654 dirserver. Complaining loudly to the OR admins just confuses them.
1655 - Whine at you if you're a server and you don't set your contactinfo.
1656 - Warn when exit policy implicitly allows local addresses.
1657 - Give a better warning when some other server advertises an
1658 ORPort that is actually an apache running ssl.
1659 - If we get an incredibly skewed timestamp from a dirserver mirror
1660 that isn't a verified OR, don't warn -- it's probably him that's
1662 - When a dirserver causes you to give a warn, mention which dirserver
1664 - Initialize libevent later in the startup process, so the logs are
1665 already established by the time we start logging libevent warns.
1666 - Use correct errno on win32 if libevent fails.
1667 - Check and warn about known-bad/slow libevent versions.
1668 - Stop warning about sigpipes in the logs. We're going to
1669 pretend that getting these occassionally is normal and fine.
1671 o New contrib scripts:
1672 - New experimental script tor/contrib/exitlist: a simple python
1673 script to parse directories and find Tor nodes that exit to listed
1675 - New experimental script tor/contrib/ExerciseServer.py (needs more
1676 work) that uses the controller interface to build circuits and
1677 fetch pages over them. This will help us bootstrap servers that
1678 have lots of capacity but haven't noticed it yet.
1679 - New experimental script tor/contrib/PathDemo.py (needs more work)
1680 that uses the controller interface to let you choose whole paths
1682 "<hostname>.<path,separated by dots>.<length of path>.path"
1683 - New contributed script "privoxy-tor-toggle" to toggle whether
1684 Privoxy uses Tor. Seems to be configured for Debian by default.
1685 - Have torctl.in/tor.sh.in check for location of su binary (needed
1689 - chdir() to your datadirectory at the *end* of the daemonize process,
1690 not the beginning. This was a problem because the first time you
1691 run tor, if your datadir isn't there, and you have runasdaemon set
1692 to 1, it will try to chdir to it before it tries to create it. Oops.
1693 - Fix several double-mark-for-close bugs, e.g. where we were finding
1694 a conn for a cell even if that conn is already marked for close.
1695 - Stop most cases of hanging up on a socks connection without sending
1697 - Fix a bug in the RPM package: set home directory for _tor to
1698 something more reasonable when first installing.
1699 - Stop putting nodename in the Platform string in server descriptors.
1700 It doesn't actually help, and it is confusing/upsetting some people.
1701 - When using preferred entry or exit nodes, ignore whether the
1702 circuit wants uptime or capacity. They asked for the nodes, they
1704 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1705 artificially capped at 500kB.
1706 - Cache local dns resolves correctly even when they're .exit
1708 - If we're hibernating and we get a SIGINT, exit immediately.
1709 - tor-resolve requests were ignoring .exit if there was a working circuit
1710 they could use instead.
1711 - Pay more attention to the ClientOnly config option.
1712 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1713 installer screens; and don't put stuff into StartupItems unless
1714 the user asks you to.
1717 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1718 rather than just rejecting it.
1719 - If our clock jumps forward by 100 seconds or more, assume something
1720 has gone wrong with our network and abandon all not-yet-used circs.
1721 - When an application is using socks5, give him the whole variety of
1722 potential socks5 responses (connect refused, host unreachable, etc),
1723 rather than just "success" or "failure".
1724 - A more sane version numbering system. See
1725 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1726 - Change version parsing logic: a version is "obsolete" if it is not
1727 recommended and (1) there is a newer recommended version in the
1728 same series, or (2) there are no recommended versions in the same
1729 series, but there are some recommended versions in a newer series.
1730 A version is "new" if it is newer than any recommended version in
1732 - Report HTTP reasons to client when getting a response from directory
1733 servers -- so you can actually know what went wrong.
1734 - Reject odd-looking addresses at the client (e.g. addresses that
1735 contain a colon), rather than having the server drop them because
1737 - Stop publishing socksport in the directory, since it's not
1738 actually meant to be public. For compatibility, publish a 0 there
1740 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1741 cookies to disk and doesn't log each web request to disk. (Thanks
1742 to Brett Carrington for pointing this out.)
1743 - Add OSX uninstall instructions. An actual uninstall script will
1745 - Add "opt hibernating 1" to server descriptor to make it clearer
1746 whether the server is hibernating.
1749 Changes in version 0.0.9.10 - 2005-06-16
1750 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1751 - Refuse relay cells that claim to have a length larger than the
1752 maximum allowed. This prevents a potential attack that could read
1753 arbitrary memory (e.g. keys) from an exit server's process
1757 Changes in version 0.0.9.9 - 2005-04-23
1758 o Bugfixes on 0.0.9.x:
1759 - If unofficial Tor clients connect and send weird TLS certs, our
1760 Tor server triggers an assert. This release contains a minimal
1761 backport from the broader fix that we put into 0.1.0.4-rc.
1764 Changes in version 0.0.9.8 - 2005-04-07
1765 o Bugfixes on 0.0.9.x:
1766 - We have a bug that I haven't found yet. Sometimes, very rarely,
1767 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1768 thinks of itself as idle. This meant that no new circuits ever got
1769 established. Here's a workaround to kill any cpuworker that's been
1770 busy for more than 100 seconds.
1773 Changes in version 0.0.9.7 - 2005-04-01
1774 o Bugfixes on 0.0.9.x:
1775 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1776 - Compare identity to identity, not to nickname, when extending to
1777 a router not already in the directory. This was preventing us from
1778 extending to unknown routers. Oops.
1779 - Make sure to create OS X Tor user in <500 range, so we aren't
1780 creating actual system users.
1781 - Note where connection-that-hasn't-sent-end was marked, and fix
1782 a few really loud instances of this harmless bug (it's fixed more
1786 Changes in version 0.0.9.6 - 2005-03-24
1787 o Bugfixes on 0.0.9.x (crashes and asserts):
1788 - Add new end stream reasons to maintainance branch. Fix bug where
1789 reason (8) could trigger an assert. Prevent bug from recurring.
1790 - Apparently win32 stat wants paths to not end with a slash.
1791 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1792 blowing away the circuit that conn->cpath_layer points to, then
1793 checking to see if the circ is well-formed. Backport check to make
1794 sure we dont use the cpath on a closed connection.
1795 - Prevent circuit_resume_edge_reading_helper() from trying to package
1796 inbufs for marked-for-close streams.
1797 - Don't crash on hup if your options->address has become unresolvable.
1798 - Some systems (like OS X) sometimes accept() a connection and tell
1799 you the remote host is 0.0.0.0:0. If this happens, due to some
1800 other mis-features, we get confused; so refuse the conn for now.
1802 o Bugfixes on 0.0.9.x (other):
1803 - Fix harmless but scary "Unrecognized content encoding" warn message.
1804 - Add new stream error reason: TORPROTOCOL reason means "you are not
1805 speaking a version of Tor I understand; say bye-bye to your stream."
1806 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1807 into the future, now that we are more tolerant of skew. This
1808 resolves a bug where a Tor server would refuse to cache a directory
1809 because all the directories it gets are too far in the future;
1810 yet the Tor server never logs any complaints about clock skew.
1811 - Mac packaging magic: make man pages useable, and do not overwrite
1812 existing torrc files.
1813 - Make OS X log happily to /var/log/tor/tor.log
1816 Changes in version 0.0.9.5 - 2005-02-22
1817 o Bugfixes on 0.0.9.x:
1818 - Fix an assert race at exit nodes when resolve requests fail.
1819 - Stop picking unverified dir mirrors--it only leads to misery.
1820 - Patch from Matt Edman to make NT services work better. Service
1821 support is still not compiled into the executable by default.
1822 - Patch from Dmitri Bely so the Tor service runs better under
1823 the win32 SYSTEM account.
1824 - Make tor-resolve actually work (?) on Win32.
1825 - Fix a sign bug when getrlimit claims to have 4+ billion
1826 file descriptors available.
1827 - Stop refusing to start when bandwidthburst == bandwidthrate.
1828 - When create cells have been on the onion queue more than five
1829 seconds, just send back a destroy and take them off the list.
1832 Changes in version 0.0.9.4 - 2005-02-03
1833 o Bugfixes on 0.0.9:
1834 - Fix an assert bug that took down most of our servers: when
1835 a server claims to have 1 GB of bandwidthburst, don't
1837 - Don't crash as badly if we have spawned the max allowed number
1838 of dnsworkers, or we're out of file descriptors.
1839 - Block more file-sharing ports in the default exit policy.
1840 - MaxConn is now automatically set to the hard limit of max
1841 file descriptors we're allowed (ulimit -n), minus a few for
1843 - Give a clearer message when servers need to raise their
1844 ulimit -n when they start running out of file descriptors.
1845 - SGI Compatibility patches from Jan Schaumann.
1846 - Tolerate a corrupt cached directory better.
1847 - When a dirserver hasn't approved your server, list which one.
1848 - Go into soft hibernation after 95% of the bandwidth is used,
1849 not 99%. This is especially important for daily hibernators who
1850 have a small accounting max. Hopefully it will result in fewer
1851 cut connections when the hard hibernation starts.
1852 - Load-balance better when using servers that claim more than
1853 800kB/s of capacity.
1854 - Make NT services work (experimental, only used if compiled in).
1857 Changes in version 0.0.9.3 - 2005-01-21
1858 o Bugfixes on 0.0.9:
1859 - Backport the cpu use fixes from main branch, so busy servers won't
1860 need as much processor time.
1861 - Work better when we go offline and then come back, or when we
1862 run Tor at boot before the network is up. We do this by
1863 optimistically trying to fetch a new directory whenever an
1864 application request comes in and we think we're offline -- the
1865 human is hopefully a good measure of when the network is back.
1866 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1867 long as you keep using them; actually publish hidserv descriptors
1868 shortly after they change, rather than waiting 20-40 minutes.
1869 - Enable Mac startup script by default.
1870 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1871 - When you update AllowUnverifiedNodes or FirewallPorts via the
1872 controller's setconf feature, we were always appending, never
1874 - When you update HiddenServiceDir via setconf, it was screwing up
1875 the order of reading the lines, making it fail.
1876 - Do not rewrite a cached directory back to the cache; otherwise we
1877 will think it is recent and not fetch a newer one on startup.
1878 - Workaround for webservers that lie about Content-Encoding: Tor
1879 now tries to autodetect compressed directories and compression
1880 itself. This lets us Proxypass dir fetches through apache.
1883 Changes in version 0.0.9.2 - 2005-01-04
1884 o Bugfixes on 0.0.9 (crashes and asserts):
1885 - Fix an assert on startup when the disk is full and you're logging
1887 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
1888 style address, then we'd crash.
1889 - Fix an assert trigger when the running-routers string we get from
1890 a dirserver is broken.
1891 - Make worker threads start and run on win32. Now win32 servers
1893 - Bandaid (not actually fix, but now it doesn't crash) an assert
1894 where the dns worker dies mysteriously and the main Tor process
1895 doesn't remember anything about the address it was resolving.
1897 o Bugfixes on 0.0.9 (Win32):
1898 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
1899 name out of the warning/assert messages.
1900 - Fix a superficial "unhandled error on read" bug on win32.
1901 - The win32 installer no longer requires a click-through for our
1902 license, since our Free Software license grants rights but does not
1904 - Win32: When connecting to a dirserver fails, try another one
1905 immediately. (This was already working for non-win32 Tors.)
1906 - Stop trying to parse $HOME on win32 when hunting for default
1908 - Make tor-resolve.c work on win32 by calling network_init().
1910 o Bugfixes on 0.0.9 (other):
1911 - Make 0.0.9.x build on Solaris again.
1912 - Due to a fencepost error, we were blowing away the \n when reporting
1913 confvalue items in the controller. So asking for multiple config
1914 values at once couldn't work.
1915 - When listing circuits that are pending on an opening OR connection,
1916 if we're an OR we were listing circuits that *end* at us as
1917 being pending on every listener, dns/cpu worker, etc. Stop that.
1918 - Dirservers were failing to create 'running-routers' or 'directory'
1919 strings if we had more than some threshold of routers. Fix them so
1920 they can handle any number of routers.
1921 - Fix a superficial "Duplicate mark for close" bug.
1922 - Stop checking for clock skew for OR connections, even for servers.
1923 - Fix a fencepost error that was chopping off the last letter of any
1924 nickname that is the maximum allowed nickname length.
1925 - Update URLs in log messages so they point to the new website.
1926 - Fix a potential problem in mangling server private keys while
1927 writing to disk (not triggered yet, as far as we know).
1928 - Include the licenses for other free software we include in Tor,
1929 now that we're shipping binary distributions more regularly.
1932 Changes in version 0.0.9.1 - 2004-12-15
1933 o Bugfixes on 0.0.9:
1934 - Make hibernation actually work.
1935 - Make HashedControlPassword config option work.
1936 - When we're reporting event circuit status to a controller,
1937 don't use the stream status code.
1940 Changes in version 0.0.9 - 2004-12-12
1941 o Bugfixes on 0.0.8.1 (Crashes and asserts):
1942 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
1943 write() call will fail and we handle it there.
1944 - When we run out of disk space, or other log writing error, don't
1945 crash. Just stop logging to that log and continue.
1946 - Fix isspace() and friends so they still make Solaris happy
1947 but also so they don't trigger asserts on win32.
1948 - Fix assert failure on malformed socks4a requests.
1949 - Fix an assert bug where a hidden service provider would fail if
1950 the first hop of his rendezvous circuit was down.
1951 - Better handling of size_t vs int, so we're more robust on 64
1954 o Bugfixes on 0.0.8.1 (Win32):
1955 - Make windows sockets actually non-blocking (oops), and handle
1956 win32 socket errors better.
1957 - Fix parse_iso_time on platforms without strptime (eg win32).
1958 - win32: when being multithreaded, leave parent fdarray open.
1959 - Better handling of winsock includes on non-MSV win32 compilers.
1960 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
1962 - Make unit tests work on win32.
1964 o Bugfixes on 0.0.8.1 (Path selection and streams):
1965 - Calculate timeout for waiting for a connected cell from the time
1966 we sent the begin cell, not from the time the stream started. If
1967 it took a long time to establish the circuit, we would time out
1968 right after sending the begin cell.
1969 - Fix router_compare_addr_to_addr_policy: it was not treating a port
1970 of * as always matching, so we were picking reject *:* nodes as
1971 exit nodes too. Oops.
1972 - When read() failed on a stream, we would close it without sending
1973 back an end. So 'connection refused' would simply be ignored and
1974 the user would get no response.
1975 - Stop a sigpipe: when an 'end' cell races with eof from the app,
1976 we shouldn't hold-open-until-flush if the eof arrived first.
1977 - Let resolve conns retry/expire also, rather than sticking around
1979 - Fix more dns related bugs: send back resolve_failed and end cells
1980 more reliably when the resolve fails, rather than closing the
1981 circuit and then trying to send the cell. Also attach dummy resolve
1982 connections to a circuit *before* calling dns_resolve(), to fix
1983 a bug where cached answers would never be sent in RESOLVED cells.
1985 o Bugfixes on 0.0.8.1 (Circuits):
1986 - Finally fix a bug that's been plaguing us for a year:
1987 With high load, circuit package window was reaching 0. Whenever
1988 we got a circuit-level sendme, we were reading a lot on each
1989 socket, but only writing out a bit. So we would eventually reach
1990 eof. This would be noticed and acted on even when there were still
1991 bytes sitting in the inbuf.
1992 - Use identity comparison, not nickname comparison, to choose which
1993 half of circuit-ID-space each side gets to use. This is needed
1994 because sometimes we think of a router as a nickname, and sometimes
1995 as a hex ID, and we can't predict what the other side will do.
1997 o Bugfixes on 0.0.8.1 (Other):
1998 - Fix a whole slew of memory leaks.
1999 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
2000 - If we are using select, make sure we stay within FD_SETSIZE.
2001 - When poll() is interrupted, we shouldn't believe the revents values.
2002 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
2003 and smartlist_len, which are two major profiling offenders.
2004 - If do_hup fails, actually notice.
2005 - Flush the log file descriptor after we print "Tor opening log file",
2006 so we don't see those messages days later.
2007 - Hidden service operators now correctly handle version 1 style
2008 INTRODUCE1 cells (nobody generates them still, so not a critical
2010 - Handle more errnos from accept() without closing the listener.
2011 Some OpenBSD machines were closing their listeners because
2012 they ran out of file descriptors.
2013 - Some people had wrapped their tor client/server in a script
2014 that would restart it whenever it died. This did not play well
2015 with our "shut down if your version is obsolete" code. Now people
2016 don't fetch a new directory if their local cached version is
2018 - Make our autogen.sh work on ksh as well as bash.
2019 - Better torrc example lines for dirbindaddress and orbindaddress.
2020 - Improved bounds checking on parsed ints (e.g. config options and
2021 the ones we find in directories.)
2022 - Stop using separate defaults for no-config-file and
2023 empty-config-file. Now you have to explicitly turn off SocksPort,
2024 if you don't want it open.
2025 - We were starting to daemonize before we opened our logs, so if
2026 there were any problems opening logs, we would complain to stderr,
2027 which wouldn't work, and then mysteriously exit.
2028 - If a verified OR connects to us before he's uploaded his descriptor,
2029 or we verify him and hup but he still has the original TLS
2030 connection, then conn->nickname is still set like he's unverified.
2032 o Code security improvements, inspired by Ilja:
2033 - tor_snprintf wrapper over snprintf with consistent (though not C99)
2035 - Replace sprintf with tor_snprintf. (I think they were all safe, but
2037 - Replace strcpy/strncpy with strlcpy in more places.
2038 - Avoid strcat; use tor_snprintf or strlcat instead.
2040 o Features (circuits and streams):
2041 - New circuit building strategy: keep a list of ports that we've
2042 used in the past 6 hours, and always try to have 2 circuits open
2043 or on the way that will handle each such port. Seed us with port
2044 80 so web users won't complain that Tor is "slow to start up".
2045 - Make kill -USR1 dump more useful stats about circuits.
2046 - When warning about retrying or giving up, print the address, so
2047 the user knows which one it's talking about.
2048 - If you haven't used a clean circuit in an hour, throw it away,
2049 just to be on the safe side. (This means after 6 hours a totally
2050 unused Tor client will have no circuits open.)
2051 - Support "foo.nickname.exit" addresses, to let Alice request the
2052 address "foo" as viewed by exit node "nickname". Based on a patch
2054 - If your requested entry or exit node has advertised bandwidth 0,
2056 - Be more greedy about filling up relay cells -- we try reading again
2057 once we've processed the stuff we read, in case enough has arrived
2058 to fill the last cell completely.
2059 - Refuse application socks connections to port 0.
2060 - Use only 0.0.9pre1 and later servers for resolve cells.
2062 o Features (bandwidth):
2063 - Hibernation: New config option "AccountingMax" lets you
2064 set how many bytes per month (in each direction) you want to
2065 allow your server to consume. Rather than spreading those
2066 bytes out evenly over the month, we instead hibernate for some
2067 of the month and pop up at a deterministic time, work until
2068 the bytes are consumed, then hibernate again. Config option
2069 "MonthlyAccountingStart" lets you specify which day of the month
2070 your billing cycle starts on.
2071 - Implement weekly/monthly/daily accounting: now you specify your
2072 hibernation properties by
2073 AccountingMax N bytes|KB|MB|GB|TB
2074 AccountingStart day|week|month [day] HH:MM
2075 Defaults to "month 1 0:00".
2076 - Let bandwidth and interval config options be specified as 5 bytes,
2077 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
2079 o Features (directories):
2080 - New "router-status" line in directory, to better bind each verified
2081 nickname to its identity key.
2082 - Clients can ask dirservers for /dir.z to get a compressed version
2083 of the directory. Only works for servers running 0.0.9, of course.
2084 - Make clients cache directories and use them to seed their router
2085 lists at startup. This means clients have a datadir again.
2086 - Respond to content-encoding headers by trying to uncompress as
2088 - Clients and servers now fetch running-routers; cache
2089 running-routers; compress running-routers; serve compressed
2091 - Make moria2 advertise a dirport of 80, so people behind firewalls
2092 will be able to get a directory.
2093 - Http proxy support
2094 - Dirservers translate requests for http://%s:%d/x to /x
2095 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
2096 be routed through this host.
2097 - Clients ask for /tor/x rather than /x for new enough dirservers.
2098 This way we can one day coexist peacefully with apache.
2099 - Clients specify a "Host: %s%d" http header, to be compatible
2100 with more proxies, and so running squid on an exit node can work.
2101 - Protect dirservers from overzealous descriptor uploading -- wait
2102 10 seconds after directory gets dirty, before regenerating.
2104 o Features (packages and install):
2105 - Add NSI installer contributed by J Doe.
2106 - Apply NT service patch from Osamu Fujino. Still needs more work.
2107 - Commit VC6 and VC7 workspace/project files.
2108 - Commit a tor.spec for making RPM files, with help from jbash.
2109 - Add contrib/torctl.in contributed by Glenn Fink.
2110 - Make expand_filename handle ~ and ~username.
2111 - Use autoconf to enable largefile support where necessary. Use
2112 ftello where available, since ftell can fail at 2GB.
2113 - Ship src/win32/ in the tarball, so people can use it to build.
2114 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
2117 o Features (ui controller):
2118 - Control interface: a separate program can now talk to your
2119 client/server over a socket, and get/set config options, receive
2120 notifications of circuits and streams starting/finishing/dying,
2121 bandwidth used, etc. The next step is to get some GUIs working.
2122 Let us know if you want to help out. See doc/control-spec.txt .
2123 - Ship a contrib/tor-control.py as an example script to interact
2124 with the control port.
2125 - "tor --hash-password zzyxz" will output a salted password for
2126 use in authenticating to the control interface.
2127 - Implement the control-spec's SAVECONF command, to write your
2128 configuration to torrc.
2129 - Get cookie authentication for the controller closer to working.
2130 - When set_conf changes our server descriptor, upload a new copy.
2131 But don't upload it too often if there are frequent changes.
2133 o Features (config and command-line):
2134 - Deprecate unofficial config option abbreviations, and abbreviations
2135 not on the command line.
2136 - Configuration infrastructure support for warning on obsolete
2138 - Give a slightly more useful output for "tor -h".
2139 - Break DirFetchPostPeriod into:
2140 - DirFetchPeriod for fetching full directory,
2141 - StatusFetchPeriod for fetching running-routers,
2142 - DirPostPeriod for posting server descriptor,
2143 - RendPostPeriod for posting hidden service descriptors.
2144 - New log format in config:
2145 "Log minsev[-maxsev] stdout|stderr|syslog" or
2146 "Log minsev[-maxsev] file /var/foo"
2147 - DirPolicy config option, to let people reject incoming addresses
2148 from their dirserver.
2149 - "tor --list-fingerprint" will list your identity key fingerprint
2151 - Make tor --version --version dump the cvs Id of every file.
2152 - New 'MyFamily nick1,...' config option for a server to
2153 specify other servers that shouldn't be used in the same circuit
2154 with it. Only believed if nick1 also specifies us.
2155 - New 'NodeFamily nick1,nick2,...' config option for a client to
2156 specify nodes that it doesn't want to use in the same circuit.
2157 - New 'Redirectexit pattern address:port' config option for a
2158 server to redirect exit connections, e.g. to a local squid.
2159 - Add "pass" target for RedirectExit, to make it easier to break
2160 out of a sequence of RedirectExit rules.
2161 - Make the dirservers file obsolete.
2162 - Include a dir-signing-key token in directories to tell the
2163 parsing entity which key is being used to sign.
2164 - Remove the built-in bulky default dirservers string.
2165 - New config option "Dirserver %s:%d [fingerprint]", which can be
2166 repeated as many times as needed. If no dirservers specified,
2167 default to moria1,moria2,tor26.
2168 - Make 'Routerfile' config option obsolete.
2169 - Discourage people from setting their dirfetchpostperiod more often
2170 than once per minute.
2173 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
2174 get back to normal.)
2175 - Accept *:706 (silc) in default exit policy.
2176 - Implement new versioning format for post 0.1.
2177 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
2178 log more informatively.
2179 - Check clock skew for verified servers, but allow unverified
2180 servers and clients to have any clock skew.
2181 - Make sure the hidden service descriptors are at a random offset
2182 from each other, to hinder linkability.
2183 - Clients now generate a TLS cert too, in preparation for having
2184 them act more like real nodes.
2185 - Add a pure-C tor-resolve implementation.
2186 - Use getrlimit and friends to ensure we can reach MaxConn (currently
2187 1024) file descriptors.
2188 - Raise the max dns workers from 50 to 100.
2191 Changes in version 0.0.8.1 - 2004-10-13
2193 - Fix a seg fault that can be triggered remotely for Tor
2194 clients/servers with an open dirport.
2195 - Fix a rare assert trigger, where routerinfos for entries in
2196 our cpath would expire while we're building the path.
2197 - Fix a bug in OutboundBindAddress so it (hopefully) works.
2198 - Fix a rare seg fault for people running hidden services on
2199 intermittent connections.
2200 - Fix a bug in parsing opt keywords with objects.
2201 - Fix a stale pointer assert bug when a stream detaches and
2203 - Fix a string format vulnerability (probably not exploitable)
2204 in reporting stats locally.
2205 - Fix an assert trigger: sometimes launching circuits can fail
2206 immediately, e.g. because too many circuits have failed recently.
2207 - Fix a compile warning on 64 bit platforms.
2210 Changes in version 0.0.8 - 2004-08-25
2212 - Made our unit tests compile again on OpenBSD 3.5, and tor
2213 itself compile again on OpenBSD on a sparc64.
2214 - We were neglecting milliseconds when logging on win32, so
2215 everything appeared to happen at the beginning of each second.
2216 - Check directory signature _before_ you decide whether you're
2217 you're running an obsolete version and should exit.
2218 - Check directory signature _before_ you parse the running-routers
2219 list to decide who's running.
2220 - Check return value of fclose while writing to disk, so we don't
2221 end up with broken files when servers run out of disk space.
2222 - Port it to SunOS 5.9 / Athena
2223 - Fix two bugs in saving onion keys to disk when rotating, so
2224 hopefully we'll get fewer people using old onion keys.
2225 - Remove our mostly unused -- and broken -- hex_encode()
2226 function. Use base16_encode() instead. (Thanks to Timo Lindfors
2227 for pointing out this bug.)
2228 - Only pick and establish intro points after we've gotten a
2230 - Fix assert triggers: if the other side returns an address 0.0.0.0,
2231 don't put it into the client dns cache.
2232 - If a begin failed due to exit policy, but we believe the IP
2233 address should have been allowed, switch that router to exitpolicy
2234 reject *:* until we get our next directory.
2237 - 'Extend' relay cell payloads now include the digest of the
2238 intended next hop's identity key. Now we can verify that we're
2239 extending to the right router, and also extend to routers we
2240 hadn't heard of before.
2243 - Tor nodes can now act as relays (with an advertised ORPort)
2244 without being manually verified by the dirserver operators.
2245 - Uploaded descriptors of unverified routers are now accepted
2246 by the dirservers, and included in the directory.
2247 - Verified routers are listed by nickname in the running-routers
2248 list; unverified routers are listed as "$<fingerprint>".
2249 - We now use hash-of-identity-key in most places rather than
2250 nickname or addr:port, for improved security/flexibility.
2251 - AllowUnverifiedNodes config option to let circuits choose no-name
2252 routers in entry,middle,exit,introduction,rendezvous positions.
2253 Allow middle and rendezvous positions by default.
2254 - When picking unverified routers, skip those with low uptime and/or
2255 low bandwidth, depending on what properties you care about.
2256 - ClientOnly option for nodes that never want to become servers.
2257 - Directory caching.
2258 - "AuthoritativeDir 1" option for the official dirservers.
2259 - Now other nodes (clients and servers) will cache the latest
2260 directory they've pulled down.
2261 - They can enable their DirPort to serve it to others.
2262 - Clients will pull down a directory from any node with an open
2263 DirPort, and check the signature/timestamp correctly.
2264 - Authoritative dirservers now fetch directories from other
2265 authdirservers, to stay better synced.
2266 - Running-routers list tells who's down also, along with noting
2267 if they're verified (listed by nickname) or unverified (listed
2269 - Allow dirservers to serve running-router list separately.
2270 This isn't used yet.
2271 - You can now fetch $DIRURL/running-routers to get just the
2272 running-routers line, not the whole descriptor list. (But
2273 clients don't use this yet.)
2274 - Clients choose nodes proportional to advertised bandwidth.
2275 - Clients avoid using nodes with low uptime as introduction points.
2276 - Handle servers with dynamic IP addresses: don't just replace
2277 options->Address with the resolved one at startup, and
2278 detect our address right before we make a routerinfo each time.
2279 - 'FascistFirewall' option to pick dirservers and ORs on specific
2280 ports; plus 'FirewallPorts' config option to tell FascistFirewall
2281 which ports are open. (Defaults to 80,443)
2282 - Try other dirservers immediately if the one you try is down. This
2283 should tolerate down dirservers better now.
2284 - ORs connect-on-demand to other ORs
2285 - If you get an extend cell to an OR you're not connected to,
2286 connect, handshake, and forward the create cell.
2287 - The authoritative dirservers stay connected to everybody,
2288 and everybody stays connected to 0.0.7 servers, but otherwise
2289 clients/servers expire unused connections after 5 minutes.
2290 - When servers get a sigint, they delay 30 seconds (refusing new
2291 connections) then exit. A second sigint causes immediate exit.
2292 - File and name management:
2293 - Look for .torrc if no CONFDIR "torrc" is found.
2294 - If no datadir is defined, then choose, make, and secure ~/.tor
2296 - If torrc not found, exitpolicy reject *:*.
2297 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
2298 - If no nickname is defined, derive default from hostname.
2299 - Rename secret key files, e.g. identity.key -> secret_id_key,
2300 to discourage people from mailing their identity key to tor-ops.
2301 - Refuse to build a circuit before the directory has arrived --
2302 it won't work anyway, since you won't know the right onion keys
2304 - Parse tor version numbers so we can do an is-newer-than check
2305 rather than an is-in-the-list check.
2306 - New socks command 'resolve', to let us shim gethostbyname()
2308 - A 'tor_resolve' script to access the socks resolve functionality.
2309 - A new socks-extensions.txt doc file to describe our
2310 interpretation and extensions to the socks protocols.
2311 - Add a ContactInfo option, which gets published in descriptor.
2312 - Write tor version at the top of each log file
2313 - New docs in the tarball:
2315 - Document that you should proxy your SSL traffic too.
2316 - Log a warning if the user uses an unsafe socks variant, so people
2317 are more likely to learn about privoxy or socat.
2318 - Log a warning if you're running an unverified server, to let you
2319 know you might want to get it verified.
2320 - Change the default exit policy to reject the default edonkey,
2321 kazaa, gnutella ports.
2322 - Add replace_file() to util.[ch] to handle win32's rename().
2323 - Publish OR uptime in descriptor (and thus in directory) too.
2324 - Remember used bandwidth (both in and out), and publish 15-minute
2325 snapshots for the past day into our descriptor.
2326 - Be more aggressive about trying to make circuits when the network
2327 has changed (e.g. when you unsuspend your laptop).
2328 - Check for time skew on http headers; report date in response to
2330 - If the entrynode config line has only one node, don't pick it as
2332 - Add strict{entry|exit}nodes config options. If set to 1, then
2333 we refuse to build circuits that don't include the specified entry
2335 - OutboundBindAddress config option, to bind to a specific
2336 IP address for outgoing connect()s.
2337 - End truncated log entries (e.g. directories) with "[truncated]".
2340 Changes in version 0.0.7.3 - 2004-08-12
2341 o Stop dnsworkers from triggering an assert failure when you
2342 ask them to resolve the host "".
2345 Changes in version 0.0.7.2 - 2004-07-07
2346 o A better fix for the 0.0.0.0 problem, that will hopefully
2347 eliminate the remaining related assertion failures.
2350 Changes in version 0.0.7.1 - 2004-07-04
2351 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
2352 since internally we use 0.0.0.0 to signify "not yet resolved".
2355 Changes in version 0.0.7 - 2004-06-07
2356 o Fixes for crashes and other obnoxious bugs:
2357 - Fix an epipe bug: sometimes when directory connections failed
2358 to connect, we would give them a chance to flush before closing
2360 - When we detached from a circuit because of resolvefailed, we
2361 would immediately try the same circuit twice more, and then
2362 give up on the resolve thinking we'd tried three different
2364 - Limit the number of intro circuits we'll attempt to build for a
2365 hidden service per 15-minute period.
2366 - Check recommended-software string *early*, before actually parsing
2367 the directory. Thus we can detect an obsolete version and exit,
2368 even if the new directory format doesn't parse.
2369 o Fixes for security bugs:
2370 - Remember which nodes are dirservers when you startup, and if a
2371 random OR enables his dirport, don't automatically assume he's
2372 a trusted dirserver.
2374 - Directory connections were asking the wrong poll socket to
2375 start writing, and not asking themselves to start writing.
2376 - When we detached from a circuit because we sent a begin but
2377 didn't get a connected, we would use it again the first time;
2378 but after that we would correctly switch to a different one.
2379 - Stop warning when the first onion decrypt attempt fails; they
2380 will sometimes legitimately fail now that we rotate keys.
2381 - Override unaligned-access-ok check when $host_cpu is ia64 or
2382 arm. Apparently they allow it but the kernel whines.
2383 - Dirservers try to reconnect periodically too, in case connections
2385 - Fix some memory leaks in directory servers.
2386 - Allow backslash in Win32 filenames.
2387 - Made Tor build complain-free on FreeBSD, hopefully without
2388 breaking other BSD builds. We'll see.
2389 - Check directory signatures based on name of signer, not on whom
2390 we got the directory from. This will let us cache directories more
2392 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
2395 - Doxygen markup on all functions and global variables.
2396 - Make directory functions update routerlist, not replace it. So
2397 now directory disagreements are not so critical a problem.
2398 - Remove the upper limit on number of descriptors in a dirserver's
2399 directory (not that we were anywhere close).
2400 - Allow multiple logfiles at different severity ranges.
2401 - Allow *BindAddress to specify ":port" rather than setting *Port
2402 separately. Allow multiple instances of each BindAddress config
2403 option, so you can bind to multiple interfaces if you want.
2404 - Allow multiple exit policy lines, which are processed in order.
2405 Now we don't need that huge line with all the commas in it.
2406 - Enable accept/reject policies on SOCKS connections, so you can bind
2407 to 0.0.0.0 but still control who can use your OP.
2408 - Updated the man page to reflect these features.
2411 Changes in version 0.0.6.2 - 2004-05-16
2412 o Our integrity-checking digest was checking only the most recent cell,
2413 not the previous cells like we'd thought.
2414 Thanks to Stefan Mark for finding the flaw!
2417 Changes in version 0.0.6.1 - 2004-05-06
2418 o Fix two bugs in our AES counter-mode implementation (this affected
2419 onion-level stream encryption, but not TLS-level). It turns
2420 out we were doing something much more akin to a 16-character
2421 polyalphabetic cipher. Oops.
2422 Thanks to Stefan Mark for finding the flaw!
2423 o Retire moria3 as a directory server, and add tor26 as a directory
2427 Changes in version 0.0.6 - 2004-05-02
2429 - Hidden services and rendezvous points are implemented. Go to
2430 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2431 hidden services. (This only works via a socks4a proxy such as
2432 Privoxy, and currently it's quite slow.)
2433 - We now rotate link (tls context) keys and onion keys.
2434 - CREATE cells now include oaep padding, so you can tell
2435 if you decrypted them correctly.
2436 - Retry stream correctly when we fail to connect because of
2437 exit-policy-reject (should try another) or can't-resolve-address.
2438 - When we hup a dirserver and we've *removed* a server from the
2439 approved-routers list, now we remove that server from the
2440 in-memory directories too.
2441 - Add bandwidthburst to server descriptor.
2442 - Directories now say which dirserver signed them.
2443 - Use a tor_assert macro that logs failed assertions too.
2444 - Since we don't support truncateds much, don't bother sending them;
2445 just close the circ.
2446 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2447 - Better debugging for tls errors
2448 - Set Content-Type on the directory and hidserv descriptor.
2449 - Remove IVs from cipher code, since AES-ctr has none.
2451 - Fix an assert trigger for exit nodes that's been plaguing us since
2452 the days of 0.0.2prexx (thanks weasel!)
2453 - Fix a bug where we were closing tls connections intermittently.
2454 It turns out openssl keeps its errors around -- so if an error
2455 happens, and you don't ask about it, and then another openssl
2456 operation happens and succeeds, and you ask if there was an error,
2457 it tells you about the first error.
2458 - Fix a bug that's been lurking since 27 may 03 (!)
2459 When passing back a destroy cell, we would use the wrong circ id.
2460 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2461 - Some versions of openssl have an SSL_pending function that erroneously
2462 returns bytes when there is a non-application record pending.
2463 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2464 o We were using an array of length zero in a few places.
2465 o Win32's gethostbyname can't resolve an IP to an IP.
2466 o Win32's close can't close a socket.
2467 o Handle windows socket errors correctly.
2469 - check for <sys/limits.h> so we build on FreeBSD again, and
2470 <machine/limits.h> for NetBSD.
2473 Changes in version 0.0.5 - 2004-03-30
2474 o Install torrc as torrc.sample -- we no longer clobber your
2476 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2477 o Only build circuits after we've fetched the directory: clients were
2478 using only the directory servers before they'd fetched a directory.
2479 This also means longer startup time; so it goes.
2480 o Fix an assert trigger where an OP would fail to handshake, and we'd
2481 expect it to have a nickname.
2482 o Work around a tsocks bug: do a socks reject when AP connection dies
2483 early, else tsocks goes into an infinite loop.
2484 o Hold socks connection open until reply is flushed (if possible)
2485 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2486 the dns farm to do it.
2487 o Fix c99 aliasing warnings in rephist.c
2488 o Don't include server descriptors that are older than 24 hours in the
2490 o Give socks 'reject' replies their whole 15s to attempt to flush,
2491 rather than seeing the 60s timeout and assuming the flush had failed.
2492 o Clean automake droppings from the cvs repository
2493 o Add in a 'notice' log level for things the operator should hear
2494 but that aren't warnings
2497 Changes in version 0.0.4 - 2004-03-26
2498 o When connecting to a dirserver or OR and the network is down,
2502 Changes in version 0.0.3 - 2004-03-26
2503 o Warn and fail if server chose a nickname with illegal characters
2504 o Port to Solaris and Sparc:
2505 - include missing header fcntl.h
2506 - have autoconf find -lsocket -lnsl automatically
2507 - deal with hardware word alignment
2508 - make uname() work (solaris has a different return convention)
2509 - switch from using signal() to sigaction()
2510 o Preliminary work on reputation system:
2511 - Keep statistics on success/fail of connect attempts; they're published
2512 by kill -USR1 currently.
2513 - Add a RunTesting option to try to learn link state by creating test
2514 circuits, even when SocksPort is off.
2515 - Remove unused open circuits when there are too many.
2518 Changes in version 0.0.2 - 2004-03-19
2519 - Include strlcpy and strlcat for safer string ops
2520 - define INADDR_NONE so we compile (but still not run) on solaris
2523 Changes in version 0.0.2pre27 - 2004-03-14
2525 - Allow internal tor networks (we were rejecting internal IPs,
2526 now we allow them if they're set explicitly).
2527 - And fix a few endian issues.
2530 Changes in version 0.0.2pre26 - 2004-03-14
2532 - If a stream times out after 15s without a connected cell, don't
2533 try that circuit again: try a new one.
2534 - Retry streams at most 4 times. Then give up.
2535 - When a dirserver gets a descriptor from an unknown router, it
2536 logs its fingerprint (so the dirserver operator can choose to
2537 accept it even without mail from the server operator).
2538 - Inform unapproved servers when we reject their descriptors.
2539 - Make tor build on Windows again. It works as a client, who knows
2541 - Clearer instructions in the torrc for how to set up a server.
2542 - Be more efficient about reading fd's when our global token bucket
2543 (used for rate limiting) becomes empty.
2545 - Stop asserting that computers always go forward in time. It's
2547 - When we sent a cell (e.g. destroy) and then marked an OR connection
2548 expired, we might close it before finishing a flush if the other
2549 side isn't reading right then.
2550 - Don't allow dirservers to start if they haven't defined
2552 - We were caching transient dns failures. Oops.
2553 - Prevent servers from publishing an internal IP as their address.
2554 - Address a strcat vulnerability in circuit.c
2557 Changes in version 0.0.2pre25 - 2004-03-04
2559 - Put the OR's IP in its router descriptor, not its fqdn. That way
2560 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2563 - If the user typed in an address that didn't resolve, the server
2567 Changes in version 0.0.2pre24 - 2004-03-03
2569 - Fix an assertion failure in dns.c, where we were trying to dequeue
2570 a pending dns resolve even if it wasn't pending
2571 - Fix a spurious socks5 warning about still trying to write after the
2572 connection is finished.
2573 - Hold certain marked_for_close connections open until they're finished
2574 flushing, rather than losing bytes by closing them too early.
2575 - Correctly report the reason for ending a stream
2576 - Remove some duplicate calls to connection_mark_for_close
2577 - Put switch_id and start_daemon earlier in the boot sequence, so it
2578 will actually try to chdir() to options.DataDirectory
2579 - Make 'make test' exit(1) if a test fails; fix some unit tests
2580 - Make tor fail when you use a config option it doesn't know about,
2581 rather than warn and continue.
2582 - Make --version work
2583 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2586 Changes in version 0.0.2pre23 - 2004-02-29
2588 - Print a statement when the first circ is finished, so the user
2590 - If a relay cell is unrecognized at the end of the circuit,
2591 send back a destroy. (So attacks to mutate cells are more
2593 - New config option 'excludenodes' to avoid certain nodes for circuits.
2594 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2595 so you can collect coredumps there.
2597 - Fix a bug in tls flushing where sometimes data got wedged and
2598 didn't flush until more data got sent. Hopefully this bug was
2599 a big factor in the random delays we were seeing.
2600 - Make 'connected' cells include the resolved IP, so the client
2601 dns cache actually gets populated.
2602 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2603 - When we time-out on a stream and detach from the circuit, send an
2604 end cell down it first.
2605 - Only warn about an unknown router (in exitnodes, entrynodes,
2606 excludenodes) after we've fetched a directory.
2609 Changes in version 0.0.2pre22 - 2004-02-26
2611 - Servers publish less revealing uname information in descriptors.
2612 - More memory tracking and assertions, to crash more usefully when
2614 - If the default torrc isn't there, just use some default defaults.
2615 Plus provide an internal dirservers file if they don't have one.
2616 - When the user tries to use Tor as an http proxy, give them an http
2617 501 failure explaining that we're a socks proxy.
2618 - Dump a new router.desc on hup, to help confused people who change
2619 their exit policies and then wonder why router.desc doesn't reflect
2621 - Clean up the generic tor.sh init script that we ship with.
2623 - If the exit stream is pending on the resolve, and a destroy arrives,
2624 then the stream wasn't getting removed from the pending list. I
2625 think this was the one causing recent server crashes.
2626 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2627 - When it couldn't resolve any dirservers, it was useless from then on.
2628 Now it reloads the RouterFile (or default dirservers) if it has no
2630 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2631 many users don't even *have* a /usr/local/sbin/.
2634 Changes in version 0.0.2pre21 - 2004-02-18
2636 - There's a ChangeLog file that actually reflects the changelog.
2637 - There's a 'torify' wrapper script, with an accompanying
2638 tor-tsocks.conf, that simplifies the process of using tsocks for
2639 tor. It even has a man page.
2640 - The tor binary gets installed to sbin rather than bin now.
2641 - Retry streams where the connected cell hasn't arrived in 15 seconds
2642 - Clean up exit policy handling -- get the default out of the torrc,
2643 so we can update it without forcing each server operator to fix
2645 - Allow imaps and pop3s in default exit policy
2647 - Prevent picking middleman nodes as the last node in the circuit
2650 Changes in version 0.0.2pre20 - 2004-01-30
2652 - We now have a deb package, and it's in debian unstable. Go to
2654 - I've split the TotalBandwidth option into BandwidthRate (how many
2655 bytes per second you want to allow, long-term) and
2656 BandwidthBurst (how many bytes you will allow at once before the cap
2657 kicks in). This better token bucket approach lets you, say, set
2658 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2659 performance while not exceeding your monthly bandwidth quota.
2660 - Push out a tls record's worth of data once you've got it, rather
2661 than waiting until you've read everything waiting to be read. This
2662 may improve performance by pipelining better. We'll see.
2663 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2664 from failed circuits (if they haven't been connected yet) and attach
2666 - Expire old streams that haven't managed to connect. Some day we'll
2667 have them reattach to new circuits instead.
2670 - Fix several memory leaks that were causing servers to become bloated
2672 - Fix a few very rare assert triggers. A few more remain.
2673 - Setuid to User _before_ complaining about running as root.
2676 Changes in version 0.0.2pre19 - 2004-01-07
2678 - Fix deadlock condition in dns farm. We were telling a child to die by
2679 closing the parent's file descriptor to him. But newer children were
2680 inheriting the open file descriptor from the parent, and since they
2681 weren't closing it, the socket never closed, so the child never read
2682 eof, so he never knew to exit. Similarly, dns workers were holding
2683 open other sockets, leading to all sorts of chaos.
2684 - New cleaner daemon() code for forking and backgrounding.
2685 - If you log to a file, it now prints an entry at the top of the
2686 logfile so you know it's working.
2687 - The onionskin challenge length was 30 bytes longer than necessary.
2688 - Started to patch up the spec so it's not quite so out of date.
2691 Changes in version 0.0.2pre18 - 2004-01-02
2693 - Fix endian issues with the 'integrity' field in the relay header.
2694 - Fix a potential bug where connections in state
2695 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2698 Changes in version 0.0.2pre17 - 2003-12-30
2700 - Made --debuglogfile (or any second log file, actually) work.
2701 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2702 adversary could force us into an infinite loop.
2705 - Each onionskin handshake now includes a hash of the computed key,
2706 to prove the server's identity and help perfect forward secrecy.
2707 - Changed cell size from 256 to 512 bytes (working toward compatibility
2709 - Changed cell length to 2 bytes, and moved it to the relay header.
2710 - Implemented end-to-end integrity checking for the payloads of
2712 - Separated streamid from 'recognized' (otherwise circuits will get
2713 messed up when we try to have streams exit from the middle). We
2714 use the integrity-checking to confirm that a cell is addressed to
2716 - Randomize the initial circid and streamid values, so an adversary who
2717 breaks into a node can't learn how many circuits or streams have
2721 Changes in version 0.0.2pre16 - 2003-12-14
2723 - Fixed a bug that made HUP trigger an assert
2724 - Fixed a bug where a circuit that immediately failed wasn't being
2725 counted as a failed circuit in counting retries.
2728 - Now we close the circuit when we get a truncated cell: otherwise we're
2729 open to an anonymity attack where a bad node in the path truncates
2730 the circuit and then we open streams at him.
2731 - Add port ranges to exit policies
2732 - Add a conservative default exit policy
2733 - Warn if you're running tor as root
2734 - on HUP, retry OR connections and close/rebind listeners
2735 - options.EntryNodes: try these nodes first when picking the first node
2736 - options.ExitNodes: if your best choices happen to include any of
2737 your preferred exit nodes, you choose among just those preferred
2739 - options.ExcludedNodes: nodes that are never picked in path building
2742 Changes in version 0.0.2pre15 - 2003-12-03
2743 o Robustness and bugfixes:
2744 - Sometimes clients would cache incorrect DNS resolves, which would
2745 really screw things up.
2746 - An OP that goes offline would slowly leak all its sockets and stop
2748 - A wide variety of bugfixes in exit node selection, exit policy
2749 handling, and processing pending streams when a new circuit is
2751 - Pick nodes for a path only from those the directory says are up
2752 - Choose randomly from all running dirservers, not always the first one
2753 - Increase allowed http header size for directory fetch.
2754 - Stop writing to stderr (if we're daemonized it will be closed).
2755 - Enable -g always, so cores will be more useful to me.
2756 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2759 - Wrote a man page. It lists commonly used options.
2762 - Change default loglevel to warn.
2763 - Make PidFile default to null rather than littering in your CWD.
2764 - OnionRouter config option is now obsolete. Instead it just checks
2766 - Moved to a single unified torrc file for both clients and servers.
2769 Changes in version 0.0.2pre14 - 2003-11-29
2770 o Robustness and bugfixes:
2771 - Force the admin to make the DataDirectory himself
2772 - to get ownership/permissions right
2773 - so clients no longer make a DataDirectory and then never use it
2774 - fix bug where a client who was offline for 45 minutes would never
2775 pull down a directory again
2776 - fix (or at least hide really well) the dns assert bug that was
2777 causing server crashes
2778 - warnings and improved robustness wrt clockskew for certs
2779 - use the native daemon(3) to daemonize, when available
2780 - exit if bind() fails
2781 - exit if neither socksport nor orport is defined
2782 - include our own tor_timegm (Win32 doesn't have its own)
2783 - bugfix for win32 with lots of connections
2784 - fix minor bias in PRNG
2785 - make dirserver more robust to corrupt cached directory
2788 - Wrote the design document (woo)
2790 o Circuit building and exit policies:
2791 - Circuits no longer try to use nodes that the directory has told them
2793 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2794 bitcounts (18.0.0.0/8).
2795 - Make AP connections standby for a circuit if no suitable circuit
2796 exists, rather than failing
2797 - Circuits choose exit node based on addr/port, exit policies, and
2798 which AP connections are standing by
2799 - Bump min pathlen from 2 to 3
2800 - Relay end cells have a payload to describe why the stream ended.
2801 - If the stream failed because of exit policy, try again with a new
2803 - Clients have a dns cache to remember resolved addresses.
2804 - Notice more quickly when we have no working circuits
2807 - APPort is now called SocksPort
2808 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2810 - RecommendedVersions is now a config variable rather than
2811 hardcoded (for dirservers)
2812 - Reloads config on HUP
2813 - Usage info on -h or --help
2814 - If you set User and Group config vars, it'll setu/gid to them.
2816 Changes in version 0.0.2pre13 - 2003-10-19
2817 o General stability:
2818 - SSL_write no longer fails when it returns WANTWRITE and the number
2819 of bytes in the buf has changed by the next SSL_write call.
2820 - Fix segfault fetching directory when network is down
2821 - Fix a variety of minor memory leaks
2822 - Dirservers reload the fingerprints file on HUP, so I don't have
2823 to take down the network when I approve a new router
2824 - Default server config file has explicit Address line to specify fqdn
2827 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2828 - Make listener connections not ever alloc bufs
2830 o Autoconf improvements:
2831 - don't clobber an external CFLAGS in ./configure
2832 - Make install now works
2833 - create var/lib/tor on make install
2834 - autocreate a tor.sh initscript to help distribs
2835 - autocreate the torrc and sample-server-torrc with correct paths
2837 o Log files and Daemonizing now work:
2838 - If --DebugLogFile is specified, log to it at -l debug
2839 - If --LogFile is specified, use it instead of commandline
2840 - If --RunAsDaemon is set, tor forks and backgrounds on startup