1 Changes in version 0.1.2.16 - 2007-08-01
2 o Major security fixes:
3 - Close immediately after missing authentication on control port;
4 do not allow multiple authentication attempts.
7 Changes in version 0.1.2.15 - 2007-07-17
8 o Major bugfixes (compilation):
9 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
11 o Major bugfixes (crashes):
12 - Try even harder not to dereference the first character after
13 an mmap(). Reported by lodger.
14 - Fix a crash bug in directory authorities when we re-number the
15 routerlist while inserting a new router.
16 - When the cached-routers file is an even multiple of the page size,
17 don't run off the end and crash. (Fixes bug 455; based on idea
19 - Fix eventdns.c behavior on Solaris: It is critical to include
20 orconfig.h _before_ sys/types.h, so that we can get the expected
21 definition of _FILE_OFFSET_BITS.
23 o Major bugfixes (security):
24 - Fix a possible buffer overrun when using BSD natd support. Bug
26 - When sending destroy cells from a circuit's origin, don't include
27 the reason for tearing down the circuit. The spec says we didn't,
28 and now we actually don't. Reported by lodger.
29 - Keep streamids from different exits on a circuit separate. This
30 bug may have allowed other routers on a given circuit to inject
31 cells into streams. Reported by lodger; fixes bug 446.
32 - If there's a never-before-connected-to guard node in our list,
33 never choose any guards past it. This way we don't expand our
34 guard list unless we need to.
36 o Minor bugfixes (guard nodes):
37 - Weight guard selection by bandwidth, so that low-bandwidth nodes
38 don't get overused as guards.
40 o Minor bugfixes (directory):
41 - Correctly count the number of authorities that recommend each
42 version. Previously, we were under-counting by 1.
43 - Fix a potential crash bug when we load many server descriptors at
44 once and some of them make others of them obsolete. Fixes bug 458.
46 o Minor bugfixes (hidden services):
47 - Stop tearing down the whole circuit when the user asks for a
48 connection to a port that the hidden service didn't configure.
51 o Minor bugfixes (misc):
52 - On Windows, we were preventing other processes from reading
53 cached-routers while Tor was running. Reported by janbar.
54 - Fix a possible (but very unlikely) bug in picking routers by
55 bandwidth. Add a log message to confirm that it is in fact
56 unlikely. Patch from lodger.
57 - Backport a couple of memory leak fixes.
58 - Backport miscellaneous cosmetic bugfixes.
61 Changes in version 0.1.2.14 - 2007-05-25
62 o Directory authority changes:
63 - Two directory authorities (moria1 and moria2) just moved to new
64 IP addresses. This change will particularly affect those who serve
65 or use hidden services.
67 o Major bugfixes (crashes):
68 - If a directory server runs out of space in the connection table
69 as it's processing a begin_dir request, it will free the exit stream
70 but leave it attached to the circuit, leading to unpredictable
71 behavior. (Reported by seeess, fixes bug 425.)
72 - Fix a bug in dirserv_remove_invalid() that would cause authorities
73 to corrupt memory under some really unlikely scenarios.
74 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
75 - Avoid segfaults when reading from mmaped descriptor file. (Reported
78 o Major bugfixes (security):
79 - When choosing an entry guard for a circuit, avoid using guards
80 that are in the same family as the chosen exit -- not just guards
81 that are exactly the chosen exit. (Reported by lodger.)
83 o Major bugfixes (resource management):
84 - If a directory authority is down, skip it when deciding where to get
85 networkstatus objects or descriptors. Otherwise we keep asking
86 every 10 seconds forever. Fixes bug 384.
87 - Count it as a failure if we fetch a valid network-status but we
88 don't want to keep it. Otherwise we'll keep fetching it and keep
89 not wanting to keep it. Fixes part of bug 422.
90 - If all of our dirservers have given us bad or no networkstatuses
91 lately, then stop hammering them once per minute even when we
92 think they're failed. Fixes another part of bug 422.
95 - Actually set the purpose correctly for descriptors inserted with
97 - When we have k non-v2 authorities in our DirServer config,
98 we ignored the last k authorities in the list when updating our
100 - Correctly back-off from requesting router descriptors that we are
101 having a hard time downloading.
102 - Read resolv.conf files correctly on platforms where read() returns
103 partial results on small file reads.
104 - Don't rebuild the entire router store every time we get 32K of
105 routers: rebuild it when the journal gets very large, or when
106 the gaps in the store get very large.
109 - When routers publish SVN revisions in their router descriptors,
110 authorities now include those versions correctly in networkstatus
112 - Warn when using a version of libevent before 1.3b to run a server on
113 OSX or BSD: these versions interact badly with userspace threads.
116 Changes in version 0.1.2.13 - 2007-04-24
118 - Fix a memory leak when we ask for "all" networkstatuses and we
119 get one we don't recognize.
120 - Add more asserts to hunt down bug 417.
121 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
124 Changes in version 0.1.2.12-rc - 2007-03-16
126 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
127 directory information requested inside Tor connections (i.e. via
128 begin_dir cells). It only triggered when the same connection was
129 serving other data at the same time. Reported by seeess.
132 - When creating a circuit via the controller, send a 'launched'
133 event when we're done, so we follow the spec better.
136 Changes in version 0.1.2.11-rc - 2007-03-15
137 o Minor bugfixes (controller), reported by daejees:
138 - Correct the control spec to match how the code actually responds
139 to 'getinfo addr-mappings/*'.
140 - The control spec described a GUARDS event, but the code
141 implemented a GUARD event. Standardize on GUARD, but let people
145 Changes in version 0.1.2.10-rc - 2007-03-07
146 o Major bugfixes (Windows):
147 - Do not load the NT services library functions (which may not exist)
148 just to detect if we're a service trying to shut down. Now we run
149 on Win98 and friends again.
151 o Minor bugfixes (other):
152 - Clarify a couple of log messages.
153 - Fix a misleading socks5 error number.
156 Changes in version 0.1.2.9-rc - 2007-03-02
157 o Major bugfixes (Windows):
158 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
159 of the usual GCC "%llu". This prevents a bug when saving 64-bit
160 int configuration values: the high-order 32 bits would get
161 truncated. In particular, we were being bitten by the default
162 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
163 and maybe also bug 397.)
165 o Minor bugfixes (performance):
166 - Use OpenSSL's AES implementation on platforms where it's faster.
167 This could save us as much as 10% CPU usage.
169 o Minor bugfixes (server):
170 - Do not rotate onion key immediately after setting it for the first
173 o Minor bugfixes (directory authorities):
174 - Stop letting hibernating or obsolete servers affect uptime and
176 - Stop listing hibernating servers in the v1 directory.
178 o Minor bugfixes (hidden services):
179 - Upload hidden service descriptors slightly less often, to reduce
182 o Minor bugfixes (other):
183 - Fix an assert that could trigger if a controller quickly set then
184 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
185 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
187 - Fix a potential race condition in the rpm installer. Found by
189 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
190 of 2 as indicating that the server is completely bad; it sometimes
191 means that the server is just bad for the request in question. (may fix
192 the last of bug 326.)
193 - Disable encrypted directory connections when we don't have a server
194 descriptor for the destination. We'll get this working again in
198 Changes in version 0.1.2.8-beta - 2007-02-26
199 o Major bugfixes (crashes):
200 - Stop crashing when the controller asks us to resetconf more than
201 one config option at once. (Vidalia 0.0.11 does this.)
202 - Fix a crash that happened on Win98 when we're given command-line
203 arguments: don't try to load NT service functions from advapi32.dll
204 except when we need them. (Bug introduced in 0.1.2.7-alpha;
206 - Fix a longstanding obscure crash bug that could occur when
207 we run out of DNS worker processes. (Resolves bug 390.)
209 o Major bugfixes (hidden services):
210 - Correctly detect whether hidden service descriptor downloads are
211 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
213 o Major bugfixes (accounting):
214 - When we start during an accounting interval before it's time to wake
215 up, remember to wake up at the correct time. (May fix bug 342.)
217 o Minor bugfixes (controller):
218 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
219 clear the corresponding on_circuit variable, and remember later
220 that we don't need to send a redundant CLOSED event. (Resolves part
222 - Report events where a resolve succeeded or where we got a socks
223 protocol error correctly, rather than calling both of them
225 - Change reported stream target addresses to IP consistently when
226 we finally get the IP from an exit node.
227 - Send log messages to the controller even if they happen to be very
230 o Minor bugfixes (other):
231 - Display correct results when reporting which versions are
232 recommended, and how recommended they are. (Resolves bug 383.)
233 - Improve our estimates for directory bandwidth to be less random:
234 guess that an unrecognized directory will have the average bandwidth
235 from all known directories, not that it will have the average
236 bandwidth from those directories earlier than it on the list.
237 - If we start a server with ClientOnly 1, then set ClientOnly to 0
238 and hup, stop triggering an assert based on an empty onion_key.
239 - On platforms with no working mmap() equivalent, don't warn the
240 user when cached-routers doesn't exist.
241 - Warn the user when mmap() [or its equivalent] fails for some reason
242 other than file-not-found.
243 - Don't warn the user when cached-routers.new doesn't exist: that's
244 perfectly fine when starting up for the first time.
245 - When EntryNodes are configured, rebuild the guard list to contain,
246 in order: the EntryNodes that were guards before; the rest of the
247 EntryNodes; the nodes that were guards before.
248 - Mask out all signals in sub-threads; only the libevent signal
249 handler should be processing them. This should prevent some crashes
250 on some machines using pthreads. (Patch from coderman.)
251 - Fix switched arguments on memset in the implementation of
252 tor_munmap() for systems with no mmap() call.
253 - When Tor receives a router descriptor that it asked for, but
254 no longer wants (because it has received fresh networkstatuses
255 in the meantime), do not warn the user. Cache the descriptor if
256 we're a cache; drop it if we aren't.
257 - Make earlier entry guards _really_ get retried when the network
259 - On a malformed DNS reply, always give an error to the corresponding
261 - Build with recent libevents on platforms that do not define the
262 nonstandard types "u_int8_t" and friends.
264 o Minor features (controller):
265 - Warn the user when an application uses the obsolete binary v0
266 control protocol. We're planning to remove support for it during
267 the next development series, so it's good to give people some
269 - Add STREAM_BW events to report per-entry-stream bandwidth
270 use. (Patch from Robert Hogan.)
271 - Rate-limit SIGNEWNYM signals in response to controllers that
272 impolitely generate them for every single stream. (Patch from
273 mwenge; closes bug 394.)
274 - Make REMAP stream events have a SOURCE (cache or exit), and
275 make them generated in every case where we get a successful
276 connected or resolved cell.
278 o Minor bugfixes (performance):
279 - Call router_have_min_dir_info half as often. (This is showing up in
280 some profiles, but not others.)
281 - When using GCC, make log_debug never get called at all, and its
282 arguments never get evaluated, when no debug logs are configured.
283 (This is showing up in some profiles, but not others.)
286 - Remove some never-implemented options. Mark PathlenCoinWeight as
288 - Implement proposal 106: Stop requiring clients to have well-formed
289 certificates; stop checking nicknames in certificates. (Clients
290 have certificates so that they can look like Tor servers, but in
291 the future we might want to allow them to look like regular TLS
292 clients instead. Nicknames in certificates serve no purpose other
293 than making our protocol easier to recognize on the wire.)
294 - Revise messages on handshake failure again to be even more clear about
295 which are incoming connections and which are outgoing.
296 - Discard any v1 directory info that's over 1 month old (for
297 directories) or over 1 week old (for running-routers lists).
298 - Do not warn when individual nodes in the configuration's EntryNodes,
299 ExitNodes, etc are down: warn only when all possible nodes
300 are down. (Fixes bug 348.)
301 - Always remove expired routers and networkstatus docs before checking
302 whether we have enough information to build circuits. (Fixes
304 - Put a lower-bound on MaxAdvertisedBandwidth.
307 Changes in version 0.1.2.7-alpha - 2007-02-06
308 o Major bugfixes (rate limiting):
309 - Servers decline directory requests much more aggressively when
310 they're low on bandwidth. Otherwise they end up queueing more and
311 more directory responses, which can't be good for latency.
312 - But never refuse directory requests from local addresses.
313 - Fix a memory leak when sending a 503 response for a networkstatus
315 - Be willing to read or write on local connections (e.g. controller
316 connections) even when the global rate limiting buckets are empty.
317 - If our system clock jumps back in time, don't publish a negative
318 uptime in the descriptor. Also, don't let the global rate limiting
319 buckets go absurdly negative.
320 - Flush local controller connection buffers periodically as we're
321 writing to them, so we avoid queueing 4+ megabytes of data before
324 o Major bugfixes (NT services):
325 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
326 command-line flag so that admins can override the default by saying
327 "tor --service install --user "SomeUser"". This will not affect
328 existing installed services. Also, warn the user that the service
329 will look for its configuration file in the service user's
330 %appdata% directory. (We can't do the 'hardwire the user's appdata
331 directory' trick any more, since we may not have read access to that
334 o Major bugfixes (other):
335 - Previously, we would cache up to 16 old networkstatus documents
336 indefinitely, if they came from nontrusted authorities. Now we
337 discard them if they are more than 10 days old.
338 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
340 - Detect and reject malformed DNS responses containing circular
342 - If exits are rare enough that we're not marking exits as guards,
343 ignore exit bandwidth when we're deciding the required bandwidth
345 - When we're handling a directory connection tunneled over Tor,
346 don't fill up internal memory buffers with all the data we want
347 to tunnel; instead, only add it if the OR connection that will
348 eventually receive it has some room for it. (This can lead to
349 slowdowns in tunneled dir connections; a better solution will have
352 o Minor bugfixes (dns):
353 - Add some defensive programming to eventdns.c in an attempt to catch
354 possible memory-stomping bugs.
355 - Detect and reject DNS replies containing IPv4 or IPv6 records with
356 an incorrect number of bytes. (Previously, we would ignore the
358 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
359 in the correct order, and doesn't crash.
360 - Free memory held in recently-completed DNS lookup attempts on exit.
361 This was not a memory leak, but may have been hiding memory leaks.
362 - Handle TTL values correctly on reverse DNS lookups.
363 - Treat failure to parse resolv.conf as an error.
365 o Minor bugfixes (other):
366 - Fix crash with "tor --list-fingerprint" (reported by seeess).
367 - When computing clock skew from directory HTTP headers, consider what
368 time it was when we finished asking for the directory, not what
370 - Expire socks connections if they spend too long waiting for the
371 handshake to finish. Previously we would let them sit around for
372 days, if the connecting application didn't close them either.
373 - And if the socks handshake hasn't started, don't send a
374 "DNS resolve socks failed" handshake reply; just close it.
375 - Stop using C functions that OpenBSD's linker doesn't like.
376 - Don't launch requests for descriptors unless we have networkstatuses
377 from at least half of the authorities. This delays the first
378 download slightly under pathological circumstances, but can prevent
379 us from downloading a bunch of descriptors we don't need.
380 - Do not log IPs with TLS failures for incoming TLS
381 connections. (Fixes bug 382.)
382 - If the user asks to use invalid exit nodes, be willing to use
384 - Stop using the reserved ac_cv namespace in our configure script.
385 - Call stat() slightly less often; use fstat() when possible.
386 - Refactor the way we handle pending circuits when an OR connection
387 completes or fails, in an attempt to fix a rare crash bug.
388 - Only rewrite a conn's address based on X-Forwarded-For: headers
389 if it's a parseable public IP address; and stop adding extra quotes
390 to the resulting address.
393 - Weight directory requests by advertised bandwidth. Now we can
394 let servers enable write limiting but still allow most clients to
395 succeed at their directory requests. (We still ignore weights when
396 choosing a directory authority; I hope this is a feature.)
399 - Create a new file ReleaseNotes which was the old ChangeLog. The
400 new ChangeLog file now includes the summaries for all development
402 - Check for addresses with invalid characters at the exit as well
403 as at the client, and warn less verbosely when they fail. You can
404 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
405 - Adapt a patch from goodell to let the contrib/exitlist script
406 take arguments rather than require direct editing.
407 - Inform the server operator when we decide not to advertise a
408 DirPort due to AccountingMax enabled or a low BandwidthRate. It
409 was confusing Zax, so now we're hopefully more helpful.
410 - Bring us one step closer to being able to establish an encrypted
411 directory tunnel without knowing a descriptor first. Still not
412 ready yet. As part of the change, now assume we can use a
413 create_fast cell if we don't know anything about a router.
414 - Allow exit nodes to use nameservers running on ports other than 53.
415 - Servers now cache reverse DNS replies.
416 - Add an --ignore-missing-torrc command-line option so that we can
417 get the "use sensible defaults if the configuration file doesn't
418 exist" behavior even when specifying a torrc location on the command
421 o Minor features (controller):
422 - Track reasons for OR connection failure; make these reasons
423 available via the controller interface. (Patch from Mike Perry.)
424 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
425 can learn when clients are sending malformed hostnames to Tor.
426 - Clean up documentation for controller status events.
427 - Add a REMAP status to stream events to note that a stream's
428 address has changed because of a cached address or a MapAddress
432 Changes in version 0.1.2.6-alpha - 2007-01-09
434 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
435 connection handles more than 4 gigs in either direction, we crash.
436 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
437 advertised exit node, somebody might try to exit from us when
438 we're bootstrapping and before we've built our descriptor yet.
439 Refuse the connection rather than crashing.
442 - Warn if we (as a server) find that we've resolved an address that we
443 weren't planning to resolve.
444 - Warn that using select() on any libevent version before 1.1 will be
445 unnecessarily slow (even for select()).
446 - Flush ERR-level controller status events just like we currently
447 flush ERR-level log events, so that a Tor shutdown doesn't prevent
448 the controller from learning about current events.
450 o Minor features (more controller status events):
451 - Implement EXTERNAL_ADDRESS server status event so controllers can
452 learn when our address changes.
453 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
454 can learn when directories reject our descriptor.
455 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
456 can learn when a client application is speaking a non-socks protocol
458 - Implement DANGEROUS_SOCKS client status event so controllers
459 can learn when a client application is leaking DNS addresses.
460 - Implement BUG general status event so controllers can learn when
461 Tor is unhappy about its internal invariants.
462 - Implement CLOCK_SKEW general status event so controllers can learn
463 when Tor thinks the system clock is set incorrectly.
464 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
465 server status events so controllers can learn when their descriptors
466 are accepted by a directory.
467 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
468 server status events so controllers can learn about Tor's progress in
469 deciding whether it's reachable from the outside.
470 - Implement BAD_LIBEVENT general status event so controllers can learn
471 when we have a version/method combination in libevent that needs to
473 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
474 and DNS_USELESS server status events so controllers can learn
475 about changes to DNS server status.
477 o Minor features (directory):
478 - Authorities no longer recommend exits as guards if this would shift
479 too much load to the exit nodes.
482 Changes in version 0.1.2.5-alpha - 2007-01-06
484 - Enable write limiting as well as read limiting. Now we sacrifice
485 capacity if we're pushing out lots of directory traffic, rather
486 than overrunning the user's intended bandwidth limits.
487 - Include TLS overhead when counting bandwidth usage; previously, we
488 would count only the bytes sent over TLS, but not the bytes used
490 - Support running the Tor service with a torrc not in the same
491 directory as tor.exe and default to using the torrc located in
492 the %appdata%\Tor\ of the user who installed the service. Patch
494 - Servers now check for the case when common DNS requests are going to
495 wildcarded addresses (i.e. all getting the same answer), and change
496 their exit policy to reject *:* if it's happening.
497 - Implement BEGIN_DIR cells, so we can connect to the directory
498 server via TLS to do encrypted directory requests rather than
499 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
500 config options if you like.
502 o Minor features (config and docs):
503 - Start using the state file to store bandwidth accounting data:
504 the bw_accounting file is now obsolete. We'll keep generating it
505 for a while for people who are still using 0.1.2.4-alpha.
506 - Try to batch changes to the state file so that we do as few
507 disk writes as possible while still storing important things in
509 - The state file and the bw_accounting file get saved less often when
510 the AvoidDiskWrites config option is set.
511 - Make PIDFile work on Windows (untested).
512 - Add internal descriptions for a bunch of configuration options:
513 accessible via controller interface and in comments in saved
515 - Reject *:563 (NNTPS) in the default exit policy. We already reject
516 NNTP by default, so this seems like a sensible addition.
517 - Clients now reject hostnames with invalid characters. This should
518 avoid some inadvertent info leaks. Add an option
519 AllowNonRFC953Hostnames to disable this behavior, in case somebody
520 is running a private network with hosts called @, !, and #.
521 - Add a maintainer script to tell us which options are missing
522 documentation: "make check-docs".
523 - Add a new address-spec.txt document to describe our special-case
524 addresses: .exit, .onion, and .noconnnect.
526 o Minor features (DNS):
527 - Ongoing work on eventdns infrastructure: now it has dns server
528 and ipv6 support. One day Tor will make use of it.
529 - Add client-side caching for reverse DNS lookups.
530 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
531 - When we change nameservers or IP addresses, reset and re-launch
532 our tests for DNS hijacking.
534 o Minor features (directory):
535 - Authorities now specify server versions in networkstatus. This adds
536 about 2% to the size of compressed networkstatus docs, and allows
537 clients to tell which servers support BEGIN_DIR and which don't.
538 The implementation is forward-compatible with a proposed future
539 protocol version scheme not tied to Tor versions.
540 - DirServer configuration lines now have an orport= option so
541 clients can open encrypted tunnels to the authorities without
542 having downloaded their descriptors yet. Enabled for moria1,
543 moria2, tor26, and lefkada now in the default configuration.
544 - Directory servers are more willing to send a 503 "busy" if they
545 are near their write limit, especially for v1 directory requests.
546 Now they can use their limited bandwidth for actual Tor traffic.
547 - Clients track responses with status 503 from dirservers. After a
548 dirserver has given us a 503, we try not to use it until an hour has
549 gone by, or until we have no dirservers that haven't given us a 503.
550 - When we get a 503 from a directory, and we're not a server, we don't
551 count the failure against the total number of failures allowed
552 for the thing we're trying to download.
553 - Report X-Your-Address-Is correctly from tunneled directory
554 connections; don't report X-Your-Address-Is when it's an internal
555 address; and never believe reported remote addresses when they're
557 - Protect against an unlikely DoS attack on directory servers.
558 - Add a BadDirectory flag to network status docs so that authorities
559 can (eventually) tell clients about caches they believe to be
562 o Minor features (controller):
563 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
564 - Reimplement GETINFO so that info/names stays in sync with the
566 - Implement "GETINFO fingerprint".
567 - Implement "SETEVENTS GUARD" so controllers can get updates on
568 entry guard status as it changes.
570 o Minor features (clean up obsolete pieces):
571 - Remove some options that have been deprecated since at least
572 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
573 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
575 - We no longer look for identity and onion keys in "identity.key" and
576 "onion.key" -- these were replaced by secret_id_key and
577 secret_onion_key in 0.0.8pre1.
578 - We no longer require unrecognized directory entries to be
581 o Major bugfixes (security):
582 - Stop sending the HttpProxyAuthenticator string to directory
583 servers when directory connections are tunnelled through Tor.
584 - Clients no longer store bandwidth history in the state file.
585 - Do not log introduction points for hidden services if SafeLogging
587 - When generating bandwidth history, round down to the nearest
588 1k. When storing accounting data, round up to the nearest 1k.
589 - When we're running as a server, remember when we last rotated onion
590 keys, so that we will rotate keys once they're a week old even if
591 we never stay up for a week ourselves.
593 o Major bugfixes (other):
594 - Fix a longstanding bug in eventdns that prevented the count of
595 timed-out resolves from ever being reset. This bug caused us to
596 give up on a nameserver the third time it timed out, and try it
597 10 seconds later... and to give up on it every time it timed out
599 - Take out the '5 second' timeout from the connection retry
600 schedule. Now the first connect attempt will wait a full 10
601 seconds before switching to a new circuit. Perhaps this will help
602 a lot. Based on observations from Mike Perry.
603 - Fix a bug on the Windows implementation of tor_mmap_file() that
604 would prevent the cached-routers file from ever loading. Reported
608 - Fix an assert failure when a directory authority sets
609 AuthDirRejectUnlisted and then receives a descriptor from an
610 unlisted router. Reported by seeess.
611 - Avoid a double-free when parsing malformed DirServer lines.
612 - Fix a bug when a BSD-style PF socket is first used. Patch from
614 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
615 to resolve an address at a given exit node even when they ask for
617 - Servers no longer ever list themselves in their "family" line,
618 even if configured to do so. This makes it easier to configure
619 family lists conveniently.
620 - When running as a server, don't fall back to 127.0.0.1 when no
621 nameservers are configured in /etc/resolv.conf; instead, make the
622 user fix resolv.conf or specify nameservers explicitly. (Resolves
624 - Stop accepting certain malformed ports in configured exit policies.
625 - Don't re-write the fingerprint file every restart, unless it has
627 - Stop warning when a single nameserver fails: only warn when _all_ of
628 our nameservers have failed. Also, when we only have one nameserver,
629 raise the threshold for deciding that the nameserver is dead.
630 - Directory authorities now only decide that routers are reachable
631 if their identity keys are as expected.
632 - When the user uses bad syntax in the Log config line, stop
633 suggesting other bad syntax as a replacement.
634 - Correctly detect ipv6 DNS capability on OpenBSD.
636 o Minor bugfixes (controller):
637 - Report the circuit number correctly in STREAM CLOSED events. Bug
638 reported by Mike Perry.
639 - Do not report bizarre values for results of accounting GETINFOs
640 when the last second's write or read exceeds the allotted bandwidth.
641 - Report "unrecognized key" rather than an empty string when the
642 controller tries to fetch a networkstatus that doesn't exist.
645 Changes in version 0.1.1.26 - 2006-12-14
647 - Stop sending the HttpProxyAuthenticator string to directory
648 servers when directory connections are tunnelled through Tor.
649 - Clients no longer store bandwidth history in the state file.
650 - Do not log introduction points for hidden services if SafeLogging
654 - Fix an assert failure when a directory authority sets
655 AuthDirRejectUnlisted and then receives a descriptor from an
656 unlisted router (reported by seeess).
659 Changes in version 0.1.2.4-alpha - 2006-12-03
661 - Add support for using natd; this allows FreeBSDs earlier than
662 5.1.2 to have ipfw send connections through Tor without using
663 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
666 - Make all connections to addresses of the form ".noconnect"
667 immediately get closed. This lets application/controller combos
668 successfully test whether they're talking to the same Tor by
669 watching for STREAM events.
670 - Make cross.sh cross-compilation script work even when autogen.sh
671 hasn't been run. (Patch from Michael Mohr.)
672 - Statistics dumped by -USR2 now include a breakdown of public key
673 operations, for profiling.
676 - Fix a major leak when directory authorities parse their
677 approved-routers list, a minor memory leak when we fail to pick
678 an exit node, and a few rare leaks on errors.
679 - Handle TransPort connections even when the server sends data before
680 the client sends data. Previously, the connection would just hang
681 until the client sent data. (Patch from tup based on patch from
683 - Avoid assert failure when our cached-routers file is empty on
687 - Don't log spurious warnings when we see a circuit close reason we
688 don't recognize; it's probably just from a newer version of Tor.
689 - Have directory authorities allow larger amounts of drift in uptime
690 without replacing the server descriptor: previously, a server that
691 restarted every 30 minutes could have 48 "interesting" descriptors
693 - Start linking to the Tor specification and Tor reference manual
694 correctly in the Windows installer.
695 - Add Vidalia to the OS X uninstaller script, so when we uninstall
696 Tor/Privoxy we also uninstall Vidalia.
697 - Resume building on Irix64, and fix a lot of warnings from its
699 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
700 when we're running as a client.
703 Changes in version 0.1.1.25 - 2006-11-04
705 - When a client asks us to resolve (rather than connect to)
706 an address, and we have a cached answer, give them the cached
707 answer. Previously, we would give them no answer at all.
708 - We were building exactly the wrong circuits when we predict
709 hidden service requirements, meaning Tor would have to build all
710 its circuits on demand.
711 - If none of our live entry guards have a high uptime, but we
712 require a guard with a high uptime, try adding a new guard before
713 we give up on the requirement. This patch should make long-lived
714 connections more stable on average.
715 - When testing reachability of our DirPort, don't launch new
716 tests when there's already one in progress -- unreachable
717 servers were stacking up dozens of testing streams.
720 - When the user sends a NEWNYM signal, clear the client-side DNS
721 cache too. Otherwise we continue to act on previous information.
724 - Avoid a memory corruption bug when creating a hash table for
726 - Avoid possibility of controller-triggered crash when misusing
727 certain commands from a v0 controller on platforms that do not
728 handle printf("%s",NULL) gracefully.
729 - Avoid infinite loop on unexpected controller input.
730 - Don't log spurious warnings when we see a circuit close reason we
731 don't recognize; it's probably just from a newer version of Tor.
732 - Add Vidalia to the OS X uninstaller script, so when we uninstall
733 Tor/Privoxy we also uninstall Vidalia.
736 Changes in version 0.1.2.3-alpha - 2006-10-29
738 - Prepare for servers to publish descriptors less often: never
739 discard a descriptor simply for being too old until either it is
740 recommended by no authorities, or until we get a better one for
741 the same router. Make caches consider retaining old recommended
742 routers for even longer.
743 - If most authorities set a BadExit flag for a server, clients
744 don't think of it as a general-purpose exit. Clients only consider
745 authorities that advertise themselves as listing bad exits.
746 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
747 headers for content, so that we can work better in the presence of
748 caching HTTP proxies.
749 - Allow authorities to list nodes as bad exits by fingerprint or by
752 o Minor features, controller:
753 - Add a REASON field to CIRC events; for backward compatibility, this
754 field is sent only to controllers that have enabled the extended
755 event format. Also, add additional reason codes to explain why
756 a given circuit has been destroyed or truncated. (Patches from
758 - Add a REMOTE_REASON field to extended CIRC events to tell the
759 controller about why a remote OR told us to close a circuit.
760 - Stream events also now have REASON and REMOTE_REASON fields,
761 working much like those for circuit events.
762 - There's now a GETINFO ns/... field so that controllers can ask Tor
763 about the current status of a router.
764 - A new event type "NS" to inform a controller when our opinion of
765 a router's status has changed.
766 - Add a GETINFO events/names and GETINFO features/names so controllers
767 can tell which events and features are supported.
768 - A new CLEARDNSCACHE signal to allow controllers to clear the
769 client-side DNS cache without expiring circuits.
772 - When the user sends a NEWNYM signal, clear the client-side DNS
773 cache too. Otherwise we continue to act on previous information.
776 - Avoid sending junk to controllers or segfaulting when a controller
777 uses EVENT_NEW_DESC with verbose nicknames.
778 - Stop triggering asserts if the controller tries to extend hidden
779 service circuits (reported by mwenge).
780 - Avoid infinite loop on unexpected controller input.
781 - When the controller does a "GETINFO network-status", tell it
782 about even those routers whose descriptors are very old, and use
783 long nicknames where appropriate.
784 - Change NT service functions to be loaded on demand. This lets us
785 build with MinGW without breaking Tor for Windows 98 users.
786 - Do DirPort reachability tests less often, since a single test
787 chews through many circuits before giving up.
788 - In the hidden service example in torrc.sample, stop recommending
789 esoteric and discouraged hidden service options.
790 - When stopping an NT service, wait up to 10 sec for it to actually
791 stop. (Patch from Matt Edman; resolves bug 295.)
792 - Fix handling of verbose nicknames with ORCONN controller events:
793 make them show up exactly when requested, rather than exactly when
795 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
796 printing a duplicate "$" in the keys we send (reported by mwenge).
797 - Correctly set maximum connection limit on Cygwin. (This time
799 - Try to detect Windows correctly when cross-compiling.
800 - Detect the size of the routers file correctly even if it is
801 corrupted (on systems without mmap) or not page-aligned (on systems
802 with mmap). This bug was harmless.
803 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
804 to open a stream fails; now we do in more cases. This should
805 make clients able to find a good exit faster in some cases, since
806 unhandleable requests will now get an error rather than timing out.
807 - Resolve two memory leaks when rebuilding the on-disk router cache
808 (reported by fookoowa).
809 - Clean up minor code warnings suggested by the MIPSpro C compiler,
810 and reported by some Centos users.
811 - Controller signals now work on non-Unix platforms that don't define
812 SIGUSR1 and SIGUSR2 the way we expect.
813 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
814 values before failing, and always enables eventdns.
815 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
816 Try to fix this in configure.in by checking for most functions
817 before we check for libevent.
820 Changes in version 0.1.2.2-alpha - 2006-10-07
822 - Make our async eventdns library on-by-default for Tor servers,
823 and plan to deprecate the separate dnsworker threads.
824 - Add server-side support for "reverse" DNS lookups (using PTR
825 records so clients can determine the canonical hostname for a given
826 IPv4 address). Only supported by servers using eventdns; servers
827 now announce in their descriptors whether they support eventdns.
828 - Specify and implement client-side SOCKS5 interface for reverse DNS
829 lookups (see doc/socks-extensions.txt).
830 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
831 connect to directory servers through Tor. Previously, clients needed
832 to find Tor exits to make private connections to directory servers.
833 - Avoid choosing Exit nodes for entry or middle hops when the
834 total bandwidth available from non-Exit nodes is much higher than
835 the total bandwidth available from Exit nodes.
836 - Workaround for name servers (like Earthlink's) that hijack failing
837 DNS requests and replace the no-such-server answer with a "helpful"
838 redirect to an advertising-driven search portal. Also work around
839 DNS hijackers who "helpfully" decline to hijack known-invalid
840 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
841 lets you turn it off.
842 - Send out a burst of long-range padding cells once we've established
843 that we're reachable. Spread them over 4 circuits, so hopefully
844 a few will be fast. This exercises our bandwidth and bootstraps
845 us into the directory more quickly.
847 o New/improved config options:
848 - Add new config option "ResolvConf" to let the server operator
849 choose an alternate resolve.conf file when using eventdns.
850 - Add an "EnforceDistinctSubnets" option to control our "exclude
851 servers on the same /16" behavior. It's still on by default; this
852 is mostly for people who want to operate private test networks with
853 all the machines on the same subnet.
854 - If one of our entry guards is on the ExcludeNodes list, or the
855 directory authorities don't think it's a good guard, treat it as
856 if it were unlisted: stop using it as a guard, and throw it off
857 the guards list if it stays that way for a long time.
858 - Allow directory authorities to be marked separately as authorities
859 for the v1 directory protocol, the v2 directory protocol, and
860 as hidden service directories, to make it easier to retire old
861 authorities. V1 authorities should set "HSAuthoritativeDir 1"
862 to continue being hidden service authorities too.
863 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
865 o Minor features, controller:
866 - Fix CIRC controller events so that controllers can learn the
867 identity digests of non-Named servers used in circuit paths.
868 - Let controllers ask for more useful identifiers for servers. Instead
869 of learning identity digests for un-Named servers and nicknames
870 for Named servers, the new identifiers include digest, nickname,
871 and indication of Named status. Off by default; see control-spec.txt
872 for more information.
873 - Add a "getinfo address" controller command so it can display Tor's
874 best guess to the user.
875 - New controller event to alert the controller when our server
876 descriptor has changed.
877 - Give more meaningful errors on controller authentication failure.
879 o Minor features, other:
880 - When asked to resolve a hostname, don't use non-exit servers unless
881 requested to do so. This allows servers with broken DNS to be
882 useful to the network.
883 - Divide eventdns log messages into warn and info messages.
884 - Reserve the nickname "Unnamed" for routers that can't pick
885 a hostname: any router can call itself Unnamed; directory
886 authorities will never allocate Unnamed to any particular router;
887 clients won't believe that any router is the canonical Unnamed.
888 - Only include function names in log messages for info/debug messages.
889 For notice/warn/err, the content of the message should be clear on
890 its own, and printing the function name only confuses users.
891 - Avoid some false positives during reachability testing: don't try
892 to test via a server that's on the same /24 as us.
893 - If we fail to build a circuit to an intended enclave, and it's
894 not mandatory that we use that enclave, stop wanting it.
895 - When eventdns is enabled, allow multithreaded builds on NetBSD and
896 OpenBSD. (We had previously disabled threads on these platforms
897 because they didn't have working thread-safe resolver functions.)
899 o Major bugfixes, anonymity/security:
900 - If a client asked for a server by name, and there's a named server
901 in our network-status but we don't have its descriptor yet, we
902 could return an unnamed server instead.
903 - Fix NetBSD bug that could allow someone to force uninitialized RAM
904 to be sent to a server's DNS resolver. This only affects NetBSD
905 and other platforms that do not bounds-check tolower().
906 - Reject (most) attempts to use Tor circuits with length one. (If
907 many people start using Tor as a one-hop proxy, exit nodes become
908 a more attractive target for compromise.)
909 - Just because your DirPort is open doesn't mean people should be
910 able to remotely teach you about hidden service descriptors. Now
911 only accept rendezvous posts if you've got HSAuthoritativeDir set.
913 o Major bugfixes, other:
914 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
915 - When a client asks the server to resolve (not connect to)
916 an address, and it has a cached answer, give them the cached answer.
917 Previously, the server would give them no answer at all.
918 - Allow really slow clients to not hang up five minutes into their
919 directory downloads (suggested by Adam J. Richter).
920 - We were building exactly the wrong circuits when we anticipated
921 hidden service requirements, meaning Tor would have to build all
922 its circuits on demand.
923 - Avoid crashing when we mmap a router cache file of size 0.
924 - When testing reachability of our DirPort, don't launch new
925 tests when there's already one in progress -- unreachable
926 servers were stacking up dozens of testing streams.
928 o Minor bugfixes, correctness:
929 - If we're a directory mirror and we ask for "all" network status
930 documents, we would discard status documents from authorities
932 - Avoid a memory corruption bug when creating a hash table for
934 - Avoid controller-triggered crash when misusing certain commands
935 from a v0 controller on platforms that do not handle
936 printf("%s",NULL) gracefully.
937 - Don't crash when a controller sends a third argument to an
938 "extendcircuit" request.
939 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
940 response; fix error code when "getinfo dir/status/" fails.
941 - Avoid crash when telling controller stream-status and a stream
943 - Patch from Adam Langley to fix assert() in eventdns.c.
944 - Fix a debug log message in eventdns to say "X resolved to Y"
945 instead of "X resolved to X".
946 - Make eventdns give strings for DNS errors, not just error numbers.
947 - Track unreachable entry guards correctly: don't conflate
948 'unreachable by us right now' with 'listed as down by the directory
949 authorities'. With the old code, if a guard was unreachable by
950 us but listed as running, it would clog our guard list forever.
951 - Behave correctly in case we ever have a network with more than
952 2GB/s total advertised capacity.
953 - Make TrackExitHosts case-insensitive, and fix the behavior of
954 ".suffix" TrackExitHosts items to avoid matching in the middle of
956 - Finally fix the openssl warnings from newer gccs that believe that
957 ignoring a return value is okay, but casting a return value and
958 then ignoring it is a sign of madness.
959 - Prevent the contrib/exitlist script from printing the same
960 result more than once.
961 - Patch from Steve Hildrey: Generate network status correctly on
962 non-versioning dirservers.
963 - Don't listen to the X-Your-Address-Is hint if you did the lookup
964 via Tor; otherwise you'll think you're the exit node's IP address.
966 o Minor bugfixes, performance:
967 - Two small performance improvements on parsing descriptors.
968 - Major performance improvement on inserting descriptors: change
969 algorithm from O(n^2) to O(n).
970 - Make the common memory allocation path faster on machines where
971 malloc(0) returns a pointer.
972 - Start remembering X-Your-Address-Is directory hints even if you're
973 a client, so you can become a server more smoothly.
974 - Avoid duplicate entries on MyFamily line in server descriptor.
976 o Packaging, features:
977 - Remove architecture from OS X builds. The official builds are
978 now universal binaries.
979 - The Debian package now uses --verify-config when (re)starting,
980 to distinguish configuration errors from other errors.
981 - Update RPMs to require libevent 1.1b.
983 o Packaging, bugfixes:
984 - Patches so Tor builds with MinGW on Windows.
985 - Patches so Tor might run on Cygwin again.
986 - Resume building on non-gcc compilers and ancient gcc. Resume
987 building with the -O0 compile flag. Resume building cleanly on
989 - Run correctly on OS X platforms with case-sensitive filesystems.
990 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
991 - Add autoconf checks so Tor can build on Solaris x86 again.
994 - Documented (and renamed) ServerDNSSearchDomains and
995 ServerDNSResolvConfFile options.
996 - Be clearer that the *ListenAddress directives can be repeated
1000 Changes in version 0.1.1.24 - 2006-09-29
1002 - Allow really slow clients to not hang up five minutes into their
1003 directory downloads (suggested by Adam J. Richter).
1004 - Fix major performance regression from 0.1.0.x: instead of checking
1005 whether we have enough directory information every time we want to
1006 do something, only check when the directory information has changed.
1007 This should improve client CPU usage by 25-50%.
1008 - Don't crash if, after a server has been running for a while,
1009 it can't resolve its hostname.
1012 - Allow Tor to start when RunAsDaemon is set but no logs are set.
1013 - Don't crash when the controller receives a third argument to an
1014 "extendcircuit" request.
1015 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
1016 response; fix error code when "getinfo dir/status/" fails.
1017 - Fix configure.in to not produce broken configure files with
1018 more recent versions of autoconf. Thanks to Clint for his auto*
1020 - Fix security bug on NetBSD that could allow someone to force
1021 uninitialized RAM to be sent to a server's DNS resolver. This
1022 only affects NetBSD and other platforms that do not bounds-check
1024 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
1025 methods: these are known to be buggy.
1026 - If we're a directory mirror and we ask for "all" network status
1027 documents, we would discard status documents from authorities
1031 Changes in version 0.1.2.1-alpha - 2006-08-27
1033 - Add "eventdns" async dns library from Adam Langley, tweaked to
1034 build on OSX and Windows. Only enabled if you pass the
1035 --enable-eventdns argument to configure.
1036 - Allow servers with no hostname or IP address to learn their
1037 IP address by asking the directory authorities. This code only
1038 kicks in when you would normally have exited with a "no address"
1039 error. Nothing's authenticated, so use with care.
1040 - Rather than waiting a fixed amount of time between retrying
1041 application connections, we wait only 5 seconds for the first,
1042 10 seconds for the second, and 15 seconds for each retry after
1043 that. Hopefully this will improve the expected user experience.
1044 - Patch from Tup to add support for transparent AP connections:
1045 this basically bundles the functionality of trans-proxy-tor
1046 into the Tor mainline. Now hosts with compliant pf/netfilter
1047 implementations can redirect TCP connections straight to Tor
1048 without diverting through SOCKS. Needs docs.
1049 - Busy directory servers save lots of memory by spooling server
1050 descriptors, v1 directories, and v2 networkstatus docs to buffers
1051 as needed rather than en masse. Also mmap the cached-routers
1052 files, so we don't need to keep the whole thing in memory too.
1053 - Automatically avoid picking more than one node from the same
1054 /16 network when constructing a circuit.
1055 - Revise and clean up the torrc.sample that we ship with; add
1056 a section for BandwidthRate and BandwidthBurst.
1059 - Split circuit_t into origin_circuit_t and or_circuit_t, and
1060 split connection_t into edge, or, dir, control, and base structs.
1061 These will save quite a bit of memory on busy servers, and they'll
1062 also help us track down bugs in the code and bugs in the spec.
1063 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
1064 or later. Log when we are doing this, so we can diagnose it when
1065 it fails. (Also, recommend libevent 1.1b for kqueue and
1066 win32 methods; deprecate libevent 1.0b harder; make libevent
1067 recommendation system saner.)
1068 - Start being able to build universal binaries on OS X (thanks
1070 - Export the default exit policy via the control port, so controllers
1071 don't need to guess what it is / will be later.
1072 - Add a man page entry for ProtocolWarnings.
1073 - Add TestVia config option to the man page.
1074 - Remove even more protocol-related warnings from Tor server logs,
1075 such as bad TLS handshakes and malformed begin cells.
1076 - Stop fetching descriptors if you're not a dir mirror and you
1077 haven't tried to establish any circuits lately. [This currently
1078 causes some dangerous behavior, because when you start up again
1079 you'll use your ancient server descriptors.]
1080 - New DirPort behavior: if you have your dirport set, you download
1081 descriptors aggressively like a directory mirror, whether or not
1083 - Get rid of the router_retry_connections notion. Now routers
1084 no longer try to rebuild long-term connections to directory
1085 authorities, and directory authorities no longer try to rebuild
1086 long-term connections to all servers. We still don't hang up
1087 connections in these two cases though -- we need to look at it
1088 more carefully to avoid flapping, and we likely need to wait til
1089 0.1.1.x is obsolete.
1090 - Drop compatibility with obsolete Tors that permit create cells
1091 to have the wrong circ_id_type.
1092 - Re-enable per-connection rate limiting. Get rid of the "OP
1093 bandwidth" concept. Lay groundwork for "bandwidth classes" --
1094 separate global buckets that apply depending on what sort of conn
1096 - Start publishing one minute or so after we find our ORPort
1097 to be reachable. This will help reduce the number of descriptors
1098 we have for ourselves floating around, since it's quite likely
1099 other things (e.g. DirPort) will change during that minute too.
1100 - Fork the v1 directory protocol into its own spec document,
1101 and mark dir-spec.txt as the currently correct (v2) spec.
1104 - When we find our DirPort to be reachable, publish a new descriptor
1105 so we'll tell the world (reported by pnx).
1106 - Publish a new descriptor after we hup/reload. This is important
1107 if our config has changed such that we'll want to start advertising
1108 our DirPort now, etc.
1109 - Allow Tor to start when RunAsDaemon is set but no logs are set.
1110 - When we have a state file we cannot parse, tell the user and
1111 move it aside. Now we avoid situations where the user starts
1112 Tor in 1904, Tor writes a state file with that timestamp in it,
1113 the user fixes her clock, and Tor refuses to start.
1114 - Fix configure.in to not produce broken configure files with
1115 more recent versions of autoconf. Thanks to Clint for his auto*
1117 - "tor --verify-config" now exits with -1(255) or 0 depending on
1118 whether the config options are bad or good.
1119 - Resolve bug 321 when using dnsworkers: append a period to every
1120 address we resolve at the exit node, so that we do not accidentally
1121 pick up local addresses, and so that failing searches are retried
1122 in the resolver search domains. (This is already solved for
1123 eventdns.) (This breaks Blossom servers for now.)
1124 - If we are using an exit enclave and we can't connect, e.g. because
1125 its webserver is misconfigured to not listen on localhost, then
1126 back off and try connecting from somewhere else before we fail.
1129 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
1130 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
1131 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
1132 when the IP address is mapped through MapAddress to a hostname.
1133 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
1134 useless IPv6 DNS resolves.
1135 - Patch suggested by Karsten Loesing: respond to SIGNAL command
1136 before we execute the signal, in case the signal shuts us down.
1137 - Clean up AllowInvalidNodes man page entry.
1138 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
1139 - Add more asserts to track down an assert error on a windows Tor
1140 server with connection_add being called with socket == -1.
1141 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
1142 - Fix misleading log messages: an entry guard that is "unlisted",
1143 as well as not known to be "down" (because we've never heard
1144 of it), is not therefore "up".
1145 - Remove code to special-case "-cvs" ending, since it has not
1146 actually mattered since 0.0.9.
1147 - Make our socks5 handling more robust to broken socks clients:
1148 throw out everything waiting on the buffer in between socks
1149 handshake phases, since they can't possibly (so the theory
1150 goes) have predicted what we plan to respond to them.
1153 Changes in version 0.1.1.23 - 2006-07-30
1155 - Fast Tor servers, especially exit nodes, were triggering asserts
1156 due to a bug in handling the list of pending DNS resolves. Some
1157 bugs still remain here; we're hunting them.
1158 - Entry guards could crash clients by sending unexpected input.
1159 - More fixes on reachability testing: if you find yourself reachable,
1160 then don't ever make any client requests (so you stop predicting
1161 circuits), then hup or have your clock jump, then later your IP
1162 changes, you won't think circuits are working, so you won't try to
1163 test reachability, so you won't publish.
1166 - Avoid a crash if the controller does a resetconf firewallports
1167 and then a setconf fascistfirewall=1.
1168 - Avoid an integer underflow when the dir authority decides whether
1169 a router is stable: we might wrongly label it stable, and compute
1170 a slightly wrong median stability, when a descriptor is published
1172 - Fix a place where we might trigger an assert if we can't build our
1173 own server descriptor yet.
1176 Changes in version 0.1.1.22 - 2006-07-05
1178 - Fix a big bug that was causing servers to not find themselves
1179 reachable if they changed IP addresses. Since only 0.1.1.22+
1180 servers can do reachability testing correctly, now we automatically
1181 make sure to test via one of these.
1182 - Fix to allow clients and mirrors to learn directory info from
1183 descriptor downloads that get cut off partway through.
1184 - Directory authorities had a bug in deciding if a newly published
1185 descriptor was novel enough to make everybody want a copy -- a few
1186 servers seem to be publishing new descriptors many times a minute.
1188 - Fix a rare bug that was causing some servers to complain about
1189 "closing wedged cpuworkers" and skip some circuit create requests.
1190 - Make the Exit flag in directory status documents actually work.
1193 Changes in version 0.1.1.21 - 2006-06-10
1194 o Crash and assert fixes from 0.1.1.20:
1195 - Fix a rare crash on Tor servers that have enabled hibernation.
1196 - Fix a seg fault on startup for Tor networks that use only one
1197 directory authority.
1198 - Fix an assert from a race condition that occurs on Tor servers
1199 while exiting, where various threads are trying to log that they're
1200 exiting, and delete the logs, at the same time.
1201 - Make our unit tests pass again on certain obscure platforms.
1204 - Add support for building SUSE RPM packages.
1205 - Speed up initial bootstrapping for clients: if we are making our
1206 first ever connection to any entry guard, then don't mark it down
1208 - When only one Tor server in the network is labelled as a guard,
1209 and we've already picked him, we would cycle endlessly picking him
1210 again, being unhappy about it, etc. Now we specifically exclude
1211 current guards when picking a new guard.
1212 - Servers send create cells more reliably after the TLS connection
1213 is established: we were sometimes forgetting to send half of them
1214 when we had more than one pending.
1215 - If we get a create cell that asks us to extend somewhere, but the
1216 Tor server there doesn't match the expected digest, we now send
1217 a destroy cell back, rather than silently doing nothing.
1218 - Make options->RedirectExit work again.
1219 - Make cookie authentication for the controller work again.
1220 - Stop being picky about unusual characters in the arguments to
1221 mapaddress. It's none of our business.
1222 - Add a new config option "TestVia" that lets you specify preferred
1223 middle hops to use for test circuits. Perhaps this will let me
1224 debug the reachability problems better.
1226 o Log / documentation fixes:
1227 - If we're a server and some peer has a broken TLS certificate, don't
1228 log about it unless ProtocolWarnings is set, i.e., we want to hear
1229 about protocol violations by others.
1230 - Fix spelling of VirtualAddrNetwork in man page.
1231 - Add a better explanation at the top of the autogenerated torrc file
1232 about what happened to our old torrc.
1235 Changes in version 0.1.1.20 - 2006-05-23
1237 - Downgrade a log severity where servers complain that they're
1239 - Avoid a compile warning on FreeBSD.
1240 - Remove string size limit on NEWDESC messages; solve bug 291.
1241 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
1242 more thoroughly when we're running on windows.
1245 Changes in version 0.1.1.19-rc - 2006-05-03
1247 - Regenerate our local descriptor if it's dirty and we try to use
1248 it locally (e.g. if it changes during reachability detection).
1249 - If we setconf our ORPort to 0, we continued to listen on the
1250 old ORPort and receive connections.
1251 - Avoid a second warning about machine/limits.h on Debian
1253 - Be willing to add our own routerinfo into the routerlist.
1254 Now authorities will include themselves in their directories
1255 and network-statuses.
1256 - Stop trying to upload rendezvous descriptors to every
1257 directory authority: only try the v1 authorities.
1258 - Servers no longer complain when they think they're not
1259 registered with the directory authorities. There were too many
1261 - Backport dist-rpm changes so rpms can be built without errors.
1264 - Implement an option, VirtualAddrMask, to set which addresses
1265 get handed out in response to mapaddress requests. This works
1266 around a bug in tsocks where 127.0.0.0/8 is never socksified.
1269 Changes in version 0.1.1.18-rc - 2006-04-10
1271 - Work harder to download live network-statuses from all the
1272 directory authorities we know about. Improve the threshold
1273 decision logic so we're more robust to edge cases.
1274 - When fetching rendezvous descriptors, we were willing to ask
1275 v2 authorities too, which would always return 404.
1278 - Stop listing down or invalid nodes in the v1 directory. This will
1279 reduce its bulk by about 1/3, and reduce load on directory
1281 - When deciding whether a router is Fast or Guard-worthy, consider
1282 his advertised BandwidthRate and not just the BandwidthCapacity.
1283 - No longer ship INSTALL and README files -- they are useless now.
1284 - Force rpmbuild to behave and honor target_cpu.
1285 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
1286 - Start to include translated versions of the tor-doc-*.html
1287 files, along with the screenshots. Still needs more work.
1288 - Start sending back 512 and 451 errors if mapaddress fails,
1289 rather than not sending anything back at all.
1290 - When we fail to bind or listen on an incoming or outgoing
1291 socket, we should close it before failing. otherwise we just
1292 leak it. (thanks to weasel for finding.)
1293 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
1294 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
1295 - Make NoPublish (even though deprecated) work again.
1296 - Fix a minor security flaw where a versioning auth dirserver
1297 could list a recommended version many times in a row to make
1298 clients more convinced that it's recommended.
1299 - Fix crash bug if there are two unregistered servers running
1300 with the same nickname, one of them is down, and you ask for
1301 them by nickname in your EntryNodes or ExitNodes. Also, try
1302 to pick the one that's running rather than an arbitrary one.
1303 - Fix an infinite loop we could hit if we go offline for too long.
1304 - Complain when we hit WSAENOBUFS on recv() or write() too.
1305 Perhaps this will help us hunt the bug.
1306 - If you're not a versioning dirserver, don't put the string
1307 "client-versions \nserver-versions \n" in your network-status.
1308 - Lower the minimum required number of file descriptors to 1000,
1309 so we can have some overhead for Valgrind on Linux, where the
1310 default ulimit -n is 1024.
1313 - Add tor.dizum.com as the fifth authoritative directory server.
1314 - Add a new config option FetchUselessDescriptors, off by default,
1315 for when you plan to run "exitlist" on your client and you want
1316 to know about even the non-running descriptors.
1319 Changes in version 0.1.1.17-rc - 2006-03-28
1321 - Clients and servers since 0.1.1.10-alpha have been expiring
1322 connections whenever they are idle for 5 minutes and they *do*
1323 have circuits on them. Oops. With this new version, clients will
1324 discard their previous entry guard choices and avoid choosing
1325 entry guards running these flawed versions.
1326 - Fix memory leak when uncompressing concatenated zlib streams. This
1327 was causing substantial leaks over time on Tor servers.
1328 - The v1 directory was including servers as much as 48 hours old,
1329 because that's how the new routerlist->routers works. Now only
1330 include them if they're 20 hours old or less.
1333 - Resume building on irix64, netbsd 2.0, etc.
1334 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
1336 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
1337 and it is confusing some users.
1338 - Mirrors stop caching the v1 directory so often.
1339 - Make the max number of old descriptors that a cache will hold
1340 rise with the number of directory authorities, so we can scale.
1341 - Change our win32 uname() hack to be more forgiving about what
1342 win32 versions it thinks it's found.
1345 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
1347 - When the controller's *setconf commands fail, collect an error
1348 message in a string and hand it back to the controller.
1349 - Make the v2 dir's "Fast" flag based on relative capacity, just
1350 like "Stable" is based on median uptime. Name everything in the
1351 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
1352 - Log server fingerprint on startup, so new server operators don't
1353 have to go hunting around their filesystem for it.
1354 - Return a robots.txt on our dirport to discourage google indexing.
1355 - Let the controller ask for GETINFO dir/status/foo so it can ask
1356 directly rather than connecting to the dir port. Only works when
1357 dirport is set for now.
1359 o New config options rather than constants in the code:
1360 - SocksTimeout: How long do we let a socks connection wait
1361 unattached before we fail it?
1362 - CircuitBuildTimeout: Cull non-open circuits that were born
1363 at least this many seconds ago.
1364 - CircuitIdleTimeout: Cull open clean circuits that were born
1365 at least this many seconds ago.
1368 Changes in version 0.1.1.16-rc - 2006-03-18
1369 o Bugfixes on 0.1.1.15-rc:
1370 - Fix assert when the controller asks to attachstream a connect-wait
1371 or resolve-wait stream.
1372 - Now do address rewriting when the controller asks us to attach
1373 to a particular circuit too. This will let Blossom specify
1374 "moria2.exit" without having to learn what moria2's IP address is.
1375 - Make the "tor --verify-config" command-line work again, so people
1376 can automatically check if their torrc will parse.
1377 - Authoritative dirservers no longer require an open connection from
1378 a server to consider him "reachable". We need this change because
1379 when we add new auth dirservers, old servers won't know not to
1381 - Let Tor build on Sun CC again.
1382 - Fix an off-by-one buffer size in dirserv.c that magically never
1383 hit our three authorities but broke sjmurdoch's own tor network.
1384 - If we as a directory mirror don't know of any v1 directory
1385 authorities, then don't try to cache any v1 directories.
1386 - Stop warning about unknown servers in our family when they are
1387 given as hex digests.
1388 - Stop complaining as quickly to the server operator that he
1389 hasn't registered his nickname/key binding.
1390 - Various cleanups so we can add new V2 Auth Dirservers.
1391 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1392 reflect the updated flags in our v2 dir protocol.
1393 - Resume allowing non-printable characters for exit streams (both
1394 for connecting and for resolving). Now we tolerate applications
1395 that don't follow the RFCs. But continue to block malformed names
1398 o Bugfixes on 0.1.0.x:
1399 - Fix assert bug in close_logs(): when we close and delete logs,
1400 remove them all from the global "logfiles" list.
1401 - Fix minor integer overflow in calculating when we expect to use up
1402 our bandwidth allocation before hibernating.
1403 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
1404 there are multiple SSLs installed with different versions.
1405 - When we try to be a server and Address is not explicitly set and
1406 our hostname resolves to a private IP address, try to use an
1407 interface address if it has a public address. Now Windows machines
1408 that think of themselves as localhost can work by default.
1411 - Let the controller ask for GETINFO dir/server/foo so it can ask
1412 directly rather than connecting to the dir port.
1413 - Let the controller tell us about certain router descriptors
1414 that it doesn't want Tor to use in circuits. Implement
1415 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
1416 - New config option SafeSocks to reject all application connections
1417 using unsafe socks protocols. Defaults to off.
1420 Changes in version 0.1.1.15-rc - 2006-03-11
1421 o Bugfixes and cleanups:
1422 - When we're printing strings from the network, don't try to print
1423 non-printable characters. This protects us against shell escape
1424 sequence exploits, and also against attacks to fool humans into
1425 misreading their logs.
1426 - Fix a bug where Tor would fail to establish any connections if you
1427 left it off for 24 hours and then started it: we were happy with
1428 the obsolete network statuses, but they all referred to router
1429 descriptors that were too old to fetch, so we ended up with no
1430 valid router descriptors.
1431 - Fix a seg fault in the controller's "getinfo orconn-status"
1432 command while listing status on incoming handshaking connections.
1433 Introduce a status name "NEW" for these connections.
1434 - If we get a linelist or linelist_s config option from the torrc
1435 (e.g. ExitPolicy) and it has no value, warn and skip rather than
1436 silently resetting it to its default.
1437 - Don't abandon entry guards until they've been down or gone for
1439 - Cleaner and quieter log messages.
1442 - New controller signal NEWNYM that makes new application requests
1444 - Add a new circuit purpose 'controller' to let the controller ask
1445 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
1446 controller command to let you specify the purpose if you're
1447 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
1448 command to let you change a circuit's purpose after it's been
1450 - Accept "private:*" in routerdesc exit policies; not generated yet
1451 because older Tors do not understand it.
1452 - Add BSD-style contributed startup script "rc.subr" from Peter
1456 Changes in version 0.1.1.14-alpha - 2006-02-20
1457 o Bugfixes on 0.1.1.x:
1458 - Don't die if we ask for a stdout or stderr log (even implicitly)
1459 and we're set to RunAsDaemon -- just warn.
1460 - We still had a few bugs in the OR connection rotation code that
1461 caused directory servers to slowly aggregate connections to other
1462 fast Tor servers. This time for sure!
1463 - Make log entries on Win32 include the name of the function again.
1464 - We were treating a pair of exit policies if they were equal even
1465 if one said accept and the other said reject -- causing us to
1466 not always publish a new descriptor since we thought nothing
1468 - Retry pending server downloads as well as pending networkstatus
1469 downloads when we unexpectedly get a socks request.
1470 - We were ignoring the IS_FAST flag in the directory status,
1471 meaning we were willing to pick trivial-bandwidth nodes for "fast"
1473 - If the controller's SAVECONF command fails (e.g. due to file
1474 permissions), let the controller know that it failed.
1477 - If we're trying to be a Tor server and running Windows 95/98/ME
1478 as a server, explain that we'll likely crash.
1479 - When we're a server, a client asks for an old-style directory,
1480 and our write bucket is empty, don't give it to him. This way
1481 small servers can continue to serve the directory *sometimes*,
1482 without getting overloaded.
1483 - Compress exit policies even more -- look for duplicate lines
1485 - Clients now honor the "guard" flag in the router status when
1486 picking entry guards, rather than looking at is_fast or is_stable.
1487 - Retain unrecognized lines in $DATADIR/state file, so that we can
1488 be forward-compatible.
1489 - Generate 18.0.0.0/8 address policy format in descs when we can;
1490 warn when the mask is not reducible to a bit-prefix.
1491 - Let the user set ControlListenAddress in the torrc. This can be
1492 dangerous, but there are some cases (like a secured LAN) where it
1494 - Split ReachableAddresses into ReachableDirAddresses and
1495 ReachableORAddresses, so we can restrict Dir conns to port 80
1496 and OR conns to port 443.
1497 - Now we can target arch and OS in rpm builds (contributed by
1498 Phobos). Also make the resulting dist-rpm filename match the
1500 - New config options to help controllers: FetchServerDescriptors
1501 and FetchHidServDescriptors for whether to fetch server
1502 info and hidserv info or let the controller do it, and
1503 PublishServerDescriptor and PublishHidServDescriptors.
1504 - Also let the controller set the __AllDirActionsPrivate config
1505 option if you want all directory fetches/publishes to happen via
1506 Tor (it assumes your controller bootstraps your circuits).
1509 Changes in version 0.1.0.17 - 2006-02-17
1510 o Crash bugfixes on 0.1.0.x:
1511 - When servers with a non-zero DirPort came out of hibernation,
1512 sometimes they would trigger an assert.
1514 o Other important bugfixes:
1515 - On platforms that don't have getrlimit (like Windows), we were
1516 artificially constraining ourselves to a max of 1024
1517 connections. Now just assume that we can handle as many as 15000
1518 connections. Hopefully this won't cause other problems.
1520 o Backported features:
1521 - When we're a server, a client asks for an old-style directory,
1522 and our write bucket is empty, don't give it to him. This way
1523 small servers can continue to serve the directory *sometimes*,
1524 without getting overloaded.
1525 - Whenever you get a 503 in response to a directory fetch, try
1526 once more. This will become important once servers start sending
1527 503's whenever they feel busy.
1528 - Fetch a new directory every 120 minutes, not every 40 minutes.
1529 Now that we have hundreds of thousands of users running the old
1530 directory algorithm, it's starting to hurt a lot.
1531 - Bump up the period for forcing a hidden service descriptor upload
1532 from 20 minutes to 1 hour.
1535 Changes in version 0.1.1.13-alpha - 2006-02-09
1536 o Crashes in 0.1.1.x:
1537 - When you tried to setconf ORPort via the controller, Tor would
1538 crash. So people using TorCP to become a server were sad.
1539 - Solve (I hope) the stack-smashing bug that we were seeing on fast
1540 servers. The problem appears to be something do with OpenSSL's
1541 random number generation, or how we call it, or something. Let me
1542 know if the crashes continue.
1543 - Turn crypto hardware acceleration off by default, until we find
1544 somebody smart who can test it for us. (It appears to produce
1545 seg faults in at least some cases.)
1546 - Fix a rare assert error when we've tried all intro points for
1547 a hidden service and we try fetching the service descriptor again:
1548 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
1551 - Fix a major load balance bug: we were round-robining in 16 KB
1552 chunks, and servers with bandwidthrate of 20 KB, while downloading
1553 a 600 KB directory, would starve their other connections. Now we
1554 try to be a bit more fair.
1555 - Dir authorities and mirrors were never expiring the newest
1556 descriptor for each server, causing memory and directory bloat.
1557 - Fix memory-bloating and connection-bloating bug on servers: We
1558 were never closing any connection that had ever had a circuit on
1559 it, because we were checking conn->n_circuits == 0, yet we had a
1560 bug that let it go negative.
1561 - Make Tor work using squid as your http proxy again -- squid
1562 returns an error if you ask for a URL that's too long, and it uses
1563 a really generic error message. Plus, many people are behind a
1564 transparent squid so they don't even realize it.
1565 - On platforms that don't have getrlimit (like Windows), we were
1566 artificially constraining ourselves to a max of 1024
1567 connections. Now just assume that we can handle as many as 15000
1568 connections. Hopefully this won't cause other problems.
1569 - Add a new config option ExitPolicyRejectPrivate which defaults to
1570 1. This means all exit policies will begin with rejecting private
1571 addresses, unless the server operator explicitly turns it off.
1574 - Clients not longer download descriptors for non-running
1576 - Before we add new directory authorities, we should make it
1577 clear that only v1 authorities should receive/publish hidden
1578 service descriptors.
1581 - As soon as we've fetched some more directory info, immediately
1582 try to download more server descriptors. This way we don't have
1583 a 10 second pause during initial bootstrapping.
1584 - Remove even more loud log messages that the server operator can't
1586 - When we're running an obsolete or un-recommended version, make
1587 the log message more clear about what the problem is and what
1588 versions *are* still recommended.
1589 - Provide a more useful warn message when our onion queue gets full:
1590 the CPU is too slow or the exit policy is too liberal.
1591 - Don't warn when we receive a 503 from a dirserver/cache -- this
1592 will pave the way for them being able to refuse if they're busy.
1593 - When we fail to bind a listener, try to provide a more useful
1594 log message: e.g., "Is Tor already running?"
1595 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
1596 Goldberg can prove things about our handshake protocol more
1598 - MaxConn has been obsolete for a while now. Document the ConnLimit
1599 config option, which is a *minimum* number of file descriptors
1600 that must be available else Tor refuses to start.
1601 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
1602 if you log to syslog and want something other than LOG_DAEMON.
1603 - Make dirservers generate a separate "guard" flag to mean,
1604 "would make a good entry guard". Make clients parse it and vote
1605 on it. Not used by clients yet.
1606 - Implement --with-libevent-dir option to ./configure. Also, improve
1607 search techniques to find libevent, and use those for openssl too.
1608 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
1609 - Only start testing reachability once we've established a
1610 circuit. This will make startup on dirservers less noisy.
1611 - Don't try to upload hidden service descriptors until we have
1612 established a circuit.
1613 - Fix the controller's "attachstream 0" command to treat conn like
1614 it just connected, doing address remapping, handling .exit and
1615 .onion idioms, and so on. Now we're more uniform in making sure
1616 that the controller hears about new and closing connections.
1619 Changes in version 0.1.1.12-alpha - 2006-01-11
1620 o Bugfixes on 0.1.1.x:
1621 - The fix to close duplicate server connections was closing all
1622 Tor client connections if they didn't establish a circuit
1623 quickly enough. Oops.
1624 - Fix minor memory issue (double-free) that happened on exit.
1626 o Bugfixes on 0.1.0.x:
1627 - Tor didn't warn when it failed to open a log file.
1630 Changes in version 0.1.1.11-alpha - 2006-01-10
1631 o Crashes in 0.1.1.x:
1632 - Include all the assert/crash fixes from 0.1.0.16.
1633 - If you start Tor and then quit very quickly, there were some
1634 races that tried to free things that weren't allocated yet.
1635 - Fix a rare memory stomp if you're running hidden services.
1636 - Fix segfault when specifying DirServer in config without nickname.
1637 - Fix a seg fault when you finish connecting to a server but at
1638 that moment you dump his server descriptor.
1639 - Extendcircuit and Attachstream controller commands would
1640 assert/crash if you don't give them enough arguments.
1641 - Fix an assert error when we're out of space in the connection_list
1642 and we try to post a hidden service descriptor (reported by weasel).
1643 - If you specify a relative torrc path and you set RunAsDaemon in
1644 your torrc, then it chdir()'s to the new directory. If you HUP,
1645 it tries to load the new torrc location, fails, and exits.
1646 The fix: no longer allow a relative path to torrc using -f.
1649 - Implement "entry guards": automatically choose a handful of entry
1650 nodes and stick with them for all circuits. Only pick new guards
1651 when the ones you have are unsuitable, and if the old guards
1652 become suitable again, switch back. This will increase security
1653 dramatically against certain end-point attacks. The EntryNodes
1654 config option now provides some hints about which entry guards you
1655 want to use most; and StrictEntryNodes means to only use those.
1656 - New directory logic: download by descriptor digest, not by
1657 fingerprint. Caches try to download all listed digests from
1658 authorities; clients try to download "best" digests from caches.
1659 This avoids partitioning and isolating attacks better.
1660 - Make the "stable" router flag in network-status be the median of
1661 the uptimes of running valid servers, and make clients pay
1662 attention to the network-status flags. Thus the cutoff adapts
1663 to the stability of the network as a whole, making IRC, IM, etc
1664 connections more reliable.
1667 - Tor servers with dynamic IP addresses were needing to wait 18
1668 hours before they could start doing reachability testing using
1669 the new IP address and ports. This is because they were using
1670 the internal descriptor to learn what to test, yet they were only
1671 rebuilding the descriptor once they decided they were reachable.
1672 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
1673 to download certain server descriptors, throw them away, and then
1674 fetch them again after 30 minutes. Now mirrors throw away these
1675 server descriptors so clients can't get them.
1676 - We were leaving duplicate connections to other ORs open for a week,
1677 rather than closing them once we detect a duplicate. This only
1678 really affected authdirservers, but it affected them a lot.
1679 - Spread the authdirservers' reachability testing over the entire
1680 testing interval, so we don't try to do 500 TLS's at once every
1684 - If the network is down, and we try to connect to a conn because
1685 we have a circuit in mind, and we timeout (30 seconds) because the
1686 network never answers, we were expiring the circuit, but we weren't
1687 obsoleting the connection or telling the entry_guards functions.
1688 - Some Tor servers process billions of cells per day. These statistics
1689 need to be uint64_t's.
1690 - Check for integer overflows in more places, when adding elements
1691 to smartlists. This could possibly prevent a buffer overflow
1692 on malicious huge inputs. I don't see any, but I haven't looked
1694 - ReachableAddresses kept growing new "reject *:*" lines on every
1696 - When you "setconf log" via the controller, it should remove all
1697 logs. We were automatically adding back in a "log notice stdout".
1698 - Newly bootstrapped Tor networks couldn't establish hidden service
1699 circuits until they had nodes with high uptime. Be more tolerant.
1700 - We were marking servers down when they could not answer every piece
1701 of the directory request we sent them. This was far too harsh.
1702 - Fix the torify (tsocks) config file to not use Tor for localhost
1704 - Directory authorities now go to the proper authority when asking for
1705 a networkstatus, even when they want a compressed one.
1706 - Fix a harmless bug that was causing Tor servers to log
1707 "Got an end because of misc error, but we're not an AP. Closing."
1708 - Authorities were treating their own descriptor changes as cosmetic,
1709 meaning the descriptor available in the network-status and the
1710 descriptor that clients downloaded were different.
1711 - The OS X installer was adding a symlink for tor_resolve but
1712 the binary was called tor-resolve (reported by Thomas Hardly).
1713 - Workaround a problem with some http proxies where they refuse GET
1714 requests that specify "Content-Length: 0" (reported by Adrian).
1715 - Fix wrong log message when you add a "HiddenServiceNodes" config
1716 line without any HiddenServiceDir line (reported by Chris Thomas).
1719 - Write the TorVersion into the state file so we have a prayer of
1720 keeping forward and backward compatibility.
1721 - Revive the FascistFirewall config option rather than eliminating it:
1722 now it's a synonym for ReachableAddresses *:80,*:443.
1723 - Clients choose directory servers from the network status lists,
1724 not from their internal list of router descriptors. Now they can
1725 go to caches directly rather than needing to go to authorities
1727 - Directory authorities ignore router descriptors that have only
1728 cosmetic differences: do this for 0.1.0.x servers now too.
1729 - Add a new flag to network-status indicating whether the server
1730 can answer v2 directory requests too.
1731 - Authdirs now stop whining so loudly about bad descriptors that
1732 they fetch from other dirservers. So when there's a log complaint,
1733 it's for sure from a freshly uploaded descriptor.
1734 - Reduce memory requirements in our structs by changing the order
1736 - There used to be two ways to specify your listening ports in a
1737 server descriptor: on the "router" line and with a separate "ports"
1738 line. Remove support for the "ports" line.
1739 - New config option "AuthDirRejectUnlisted" for auth dirservers as
1740 a panic button: if we get flooded with unusable servers we can
1741 revert to only listing servers in the approved-routers file.
1742 - Auth dir servers can now mark a fingerprint as "!reject" or
1743 "!invalid" in the approved-routers file (as its nickname), to
1744 refuse descriptors outright or include them but marked as invalid.
1745 - Servers store bandwidth history across restarts/crashes.
1746 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1747 get a better idea of why their circuits failed. Not used yet.
1748 - Directory mirrors now cache up to 16 unrecognized network-status
1749 docs. Now we can add new authdirservers and they'll be cached too.
1750 - When picking a random directory, prefer non-authorities if any
1752 - New controller option "getinfo desc/all-recent" to fetch the
1753 latest server descriptor for every router that Tor knows about.
1756 Changes in version 0.1.0.16 - 2006-01-02
1757 o Crash bugfixes on 0.1.0.x:
1758 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1759 corrupting the heap, losing FDs, or crashing when we need to resize
1760 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1761 - It turns out sparc64 platforms crash on unaligned memory access
1762 too -- so detect and avoid this.
1763 - Handle truncated compressed data correctly (by detecting it and
1765 - Fix possible-but-unlikely free(NULL) in control.c.
1766 - When we were closing connections, there was a rare case that
1767 stomped on memory, triggering seg faults and asserts.
1768 - Avoid potential infinite recursion when building a descriptor. (We
1769 don't know that it ever happened, but better to fix it anyway.)
1770 - We were neglecting to unlink marked circuits from soon-to-close OR
1771 connections, which caused some rare scribbling on freed memory.
1772 - Fix a memory stomping race bug when closing the joining point of two
1773 rendezvous circuits.
1774 - Fix an assert in time parsing found by Steven Murdoch.
1776 o Other bugfixes on 0.1.0.x:
1777 - When we're doing reachability testing, provide more useful log
1778 messages so the operator knows what to expect.
1779 - Do not check whether DirPort is reachable when we are suppressing
1780 advertising it because of hibernation.
1781 - When building with -static or on Solaris, we sometimes needed -ldl.
1782 - One of the dirservers (tor26) changed its IP address.
1783 - When we're deciding whether a stream has enough circuits around
1784 that can handle it, count the freshly dirty ones and not the ones
1785 that are so dirty they won't be able to handle it.
1786 - When we're expiring old circuits, we had a logic error that caused
1787 us to close new rendezvous circuits rather than old ones.
1788 - Give a more helpful log message when you try to change ORPort via
1789 the controller: you should upgrade Tor if you want that to work.
1790 - We were failing to parse Tor versions that start with "Tor ".
1791 - Tolerate faulty streams better: when a stream fails for reason
1792 exitpolicy, stop assuming that the router is lying about his exit
1793 policy. When a stream fails for reason misc, allow it to retry just
1794 as if it was resolvefailed. When a stream has failed three times,
1795 reset its failure count so we can try again and get all three tries.
1798 Changes in version 0.1.1.10-alpha - 2005-12-11
1799 o Correctness bugfixes on 0.1.0.x:
1800 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1801 corrupting the heap, losing FDs, or crashing when we need to resize
1802 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1803 - Stop doing the complex voodoo overkill checking for insecure
1804 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
1805 - When we were closing connections, there was a rare case that
1806 stomped on memory, triggering seg faults and asserts.
1807 - We were neglecting to unlink marked circuits from soon-to-close OR
1808 connections, which caused some rare scribbling on freed memory.
1809 - When we're deciding whether a stream has enough circuits around
1810 that can handle it, count the freshly dirty ones and not the ones
1811 that are so dirty they won't be able to handle it.
1812 - Recover better from TCP connections to Tor servers that are
1813 broken but don't tell you (it happens!); and rotate TLS
1814 connections once a week.
1815 - When we're expiring old circuits, we had a logic error that caused
1816 us to close new rendezvous circuits rather than old ones.
1817 - Fix a scary-looking but apparently harmless bug where circuits
1818 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1819 servers, and never switch to state CIRCUIT_STATE_OPEN.
1820 - When building with -static or on Solaris, we sometimes needed to
1822 - Give a useful message when people run Tor as the wrong user,
1823 rather than telling them to start chowning random directories.
1824 - We were failing to inform the controller about new .onion streams.
1826 o Security bugfixes on 0.1.0.x:
1827 - Refuse server descriptors if the fingerprint line doesn't match
1828 the included identity key. Tor doesn't care, but other apps (and
1829 humans) might actually be trusting the fingerprint line.
1830 - We used to kill the circuit when we receive a relay command we
1831 don't recognize. Now we just drop it.
1832 - Start obeying our firewall options more rigorously:
1833 . If we can't get to a dirserver directly, try going via Tor.
1834 . Don't ever try to connect (as a client) to a place our
1835 firewall options forbid.
1836 . If we specify a proxy and also firewall options, obey the
1837 firewall options even when we're using the proxy: some proxies
1838 can only proxy to certain destinations.
1839 - Fix a bug found by Lasse Overlier: when we were making internal
1840 circuits (intended to be cannibalized later for rendezvous and
1841 introduction circuits), we were picking them so that they had
1842 useful exit nodes. There was no need for this, and it actually
1843 aids some statistical attacks.
1844 - Start treating internal circuits and exit circuits separately.
1845 It's important to keep them separate because internal circuits
1846 have their last hops picked like middle hops, rather than like
1847 exit hops. So exiting on them will break the user's expectations.
1849 o Bugfixes on 0.1.1.x:
1850 - Take out the mis-feature where we tried to detect IP address
1851 flapping for people with DynDNS, and chose not to upload a new
1852 server descriptor sometimes.
1853 - Try to be compatible with OpenSSL 0.9.6 again.
1854 - Log fix: when the controller is logging about .onion addresses,
1855 sometimes it didn't include the ".onion" part of the address.
1856 - Don't try to modify options->DirServers internally -- if the
1857 user didn't specify any, just add the default ones directly to
1858 the trusted dirserver list. This fixes a bug where people running
1859 controllers would use SETCONF on some totally unrelated config
1860 option, and Tor would start yelling at them about changing their
1862 - Let the controller's redirectstream command specify a port, in
1863 case the controller wants to change that too.
1864 - When we requested a pile of server descriptors, we sometimes
1865 accidentally launched a duplicate request for the first one.
1866 - Bugfix for trackhostexits: write down the fingerprint of the
1867 chosen exit, not its nickname, because the chosen exit might not
1869 - When parsing foo.exit, if foo is unknown, and we are leaving
1870 circuits unattached, set the chosen_exit field and leave the
1871 address empty. This matters because controllers got confused
1873 - Directory authorities no longer try to download server
1874 descriptors that they know they will reject.
1876 o Features and updates:
1877 - Replace balanced trees with hash tables: this should make stuff
1878 significantly faster.
1879 - Resume using the AES counter-mode implementation that we ship,
1880 rather than OpenSSL's. Ours is significantly faster.
1881 - Many other CPU and memory improvements.
1882 - Add a new config option FastFirstHopPK (on by default) so clients
1883 do a trivial crypto handshake for their first hop, since TLS has
1884 already taken care of confidentiality and authentication.
1885 - Add a new config option TestSocks so people can see if their
1886 applications are using socks4, socks4a, socks5-with-ip, or
1887 socks5-with-hostname. This way they don't have to keep mucking
1888 with tcpdump and wondering if something got cached somewhere.
1889 - Warn when listening on a public address for socks. I suspect a
1890 lot of people are setting themselves up as open socks proxies,
1891 and they have no idea that jerks on the Internet are using them,
1892 since they simply proxy the traffic into the Tor network.
1893 - Add "private:*" as an alias in configuration for policies. Now
1894 you can simplify your exit policy rather than needing to list
1895 every single internal or nonroutable network space.
1896 - Add a new controller event type that allows controllers to get
1897 all server descriptors that were uploaded to a router in its role
1898 as authoritative dirserver.
1899 - Start shipping socks-extensions.txt, tor-doc-unix.html,
1900 tor-doc-server.html, and stylesheet.css in the tarball.
1901 - Stop shipping tor-doc.html in the tarball.
1904 Changes in version 0.1.1.9-alpha - 2005-11-15
1905 o Usability improvements:
1906 - Start calling it FooListenAddress rather than FooBindAddress,
1907 since few of our users know what it means to bind an address
1909 - Reduce clutter in server logs. We're going to try to make
1910 them actually usable now. New config option ProtocolWarnings that
1911 lets you hear about how _other Tors_ are breaking the protocol. Off
1913 - Divide log messages into logging domains. Once we put some sort
1914 of interface on this, it will let people looking at more verbose
1915 log levels specify the topics they want to hear more about.
1916 - Make directory servers return better http 404 error messages
1917 instead of a generic "Servers unavailable".
1918 - Check for even more Windows version flags when writing the platform
1919 string in server descriptors, and note any we don't recognize.
1920 - Clean up more of the OpenSSL memory when exiting, so we can detect
1921 memory leaks better.
1922 - Make directory authorities be non-versioning, non-naming by
1923 default. Now we can add new directory servers without requiring
1924 their operators to pay close attention.
1925 - When logging via syslog, include the pid whenever we provide
1926 a log entry. Suggested by Todd Fries.
1928 o Performance improvements:
1929 - Directory servers now silently throw away new descriptors that
1930 haven't changed much if the timestamps are similar. We do this to
1931 tolerate older Tor servers that upload a new descriptor every 15
1932 minutes. (It seemed like a good idea at the time.)
1933 - Inline bottleneck smartlist functions; use fast versions by default.
1934 - Add a "Map from digest to void*" abstraction digestmap_t so we
1935 can do less hex encoding/decoding. Use it in router_get_by_digest()
1936 to resolve a performance bottleneck.
1937 - Allow tor_gzip_uncompress to extract as much as possible from
1938 truncated compressed data. Try to extract as many
1939 descriptors as possible from truncated http responses (when
1940 DIR_PURPOSE_FETCH_ROUTERDESC).
1941 - Make circ->onionskin a pointer, not a static array. moria2 was using
1942 125000 circuit_t's after it had been up for a few weeks, which
1943 translates to 20+ megs of wasted space.
1944 - The private half of our EDH handshake keys are now chosen out
1945 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
1947 o Security improvements:
1948 - Start making directory caches retain old routerinfos, so soon
1949 clients can start asking by digest of descriptor rather than by
1950 fingerprint of server.
1951 - Add half our entropy from RAND_poll in OpenSSL. This knows how
1952 to use egd (if present), openbsd weirdness (if present), vms/os2
1953 weirdness (if we ever port there), and more in the future.
1955 o Bugfixes on 0.1.0.x:
1956 - Do round-robin writes of at most 16 kB per write. This might be
1957 more fair on loaded Tor servers, and it might resolve our Windows
1958 crash bug. It might also slow things down.
1959 - Our TLS handshakes were generating a single public/private
1960 keypair for the TLS context, rather than making a new one for
1961 each new connections. Oops. (But we were still rotating them
1962 periodically, so it's not so bad.)
1963 - When we were cannibalizing a circuit with a particular exit
1964 node in mind, we weren't checking to see if that exit node was
1965 already present earlier in the circuit. Oops.
1966 - When a Tor server's IP changes (e.g. from a dyndns address),
1967 upload a new descriptor so clients will learn too.
1968 - Really busy servers were keeping enough circuits open on stable
1969 connections that they were wrapping around the circuit_id
1970 space. (It's only two bytes.) This exposed a bug where we would
1971 feel free to reuse a circuit_id even if it still exists but has
1972 been marked for close. Try to fix this bug. Some bug remains.
1973 - If we would close a stream early (e.g. it asks for a .exit that
1974 we know would refuse it) but the LeaveStreamsUnattached config
1975 option is set by the controller, then don't close it.
1977 o Bugfixes on 0.1.1.8-alpha:
1978 - Fix a big pile of memory leaks, some of them serious.
1979 - Do not try to download a routerdesc if we would immediately reject
1981 - Resume inserting a newline between all router descriptors when
1982 generating (old style) signed directories, since our spec says
1984 - When providing content-type application/octet-stream for
1985 server descriptors using .z, we were leaving out the
1986 content-encoding header. Oops. (Everything tolerated this just
1987 fine, but that doesn't mean we need to be part of the problem.)
1988 - Fix a potential seg fault in getconf and getinfo using version 1
1989 of the controller protocol.
1990 - Avoid crash: do not check whether DirPort is reachable when we
1991 are suppressing it because of hibernation.
1992 - Make --hash-password not crash on exit.
1995 Changes in version 0.1.1.8-alpha - 2005-10-07
1996 o New features (major):
1997 - Clients don't download or use the directory anymore. Now they
1998 download and use network-statuses from the trusted dirservers,
1999 and fetch individual server descriptors as needed from mirrors.
2000 See dir-spec.txt for all the gory details.
2001 - Be more conservative about whether to advertise our DirPort.
2002 The main change is to not advertise if we're running at capacity
2003 and either a) we could hibernate or b) our capacity is low and
2004 we're using a default DirPort.
2005 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
2007 o New features (minor):
2008 - Try to be smart about when to retry network-status and
2009 server-descriptor fetches. Still needs some tuning.
2010 - Stop parsing, storing, or using running-routers output (but
2011 mirrors still cache and serve it).
2012 - Consider a threshold of versioning dirservers (dirservers who have
2013 an opinion about which Tor versions are still recommended) before
2014 deciding whether to warn the user that he's obsolete.
2015 - Dirservers can now reject/invalidate by key and IP, with the
2016 config options "AuthDirInvalid" and "AuthDirReject". This is
2017 useful since currently we automatically list servers as running
2018 and usable even if we know they're jerks.
2019 - Provide dire warnings to any users who set DirServer; move it out
2020 of torrc.sample and into torrc.complete.
2021 - Add MyFamily to torrc.sample in the server section.
2022 - Add nicknames to the DirServer line, so we can refer to them
2023 without requiring all our users to memorize their IP addresses.
2024 - When we get an EOF or a timeout on a directory connection, note
2025 how many bytes of serverdesc we are dropping. This will help
2026 us determine whether it is smart to parse incomplete serverdesc
2028 - Add a new function to "change pseudonyms" -- that is, to stop
2029 using any currently-dirty circuits for new streams, so we don't
2030 link new actions to old actions. Currently it's only called on
2031 HUP (or SIGNAL RELOAD).
2032 - On sighup, if UseHelperNodes changed to 1, use new circuits.
2033 - Start using RAND_bytes rather than RAND_pseudo_bytes from
2034 OpenSSL. Also, reseed our entropy every hour, not just at
2035 startup. And entropy in 512-bit chunks, not 160-bit chunks.
2037 o Fixes on 0.1.1.7-alpha:
2038 - Nobody ever implemented EVENT_ADDRMAP for control protocol
2039 version 0, so don't let version 0 controllers ask for it.
2040 - If you requested something with too many newlines via the
2041 v1 controller protocol, you could crash tor.
2042 - Fix a number of memory leaks, including some pretty serious ones.
2043 - Re-enable DirPort testing again, so Tor servers will be willing
2044 to advertise their DirPort if it's reachable.
2045 - On TLS handshake, only check the other router's nickname against
2046 its expected nickname if is_named is set.
2048 o Fixes forward-ported from 0.1.0.15:
2049 - Don't crash when we don't have any spare file descriptors and we
2050 try to spawn a dns or cpu worker.
2051 - Make the numbers in read-history and write-history into uint64s,
2052 so they don't overflow and publish negatives in the descriptor.
2055 - For the OS X package's modified privoxy config file, comment
2056 out the "logfile" line so we don't log everything passed
2058 - We were whining about using socks4 or socks5-with-local-lookup
2059 even when it's an IP in the "virtual" range we designed exactly
2061 - We were leaking some memory every time the client changes IPs.
2062 - Never call free() on tor_malloc()d memory. This will help us
2063 use dmalloc to detect memory leaks.
2064 - Check for named servers when looking them up by nickname;
2065 warn when we'recalling a non-named server by its nickname;
2066 don't warn twice about the same name.
2067 - Try to list MyFamily elements by key, not by nickname, and warn
2068 if we've not heard of the server.
2069 - Make windows platform detection (uname equivalent) smarter.
2070 - It turns out sparc64 doesn't like unaligned access either.
2073 Changes in version 0.1.0.15 - 2005-09-23
2074 o Bugfixes on 0.1.0.x:
2075 - Reject ports 465 and 587 (spam targets) in default exit policy.
2076 - Don't crash when we don't have any spare file descriptors and we
2077 try to spawn a dns or cpu worker.
2078 - Get rid of IgnoreVersion undocumented config option, and make us
2079 only warn, never exit, when we're running an obsolete version.
2080 - Don't try to print a null string when your server finds itself to
2081 be unreachable and the Address config option is empty.
2082 - Make the numbers in read-history and write-history into uint64s,
2083 so they don't overflow and publish negatives in the descriptor.
2084 - Fix a minor memory leak in smartlist_string_remove().
2085 - We were only allowing ourselves to upload a server descriptor at
2086 most every 20 minutes, even if it changed earlier than that.
2087 - Clean up log entries that pointed to old URLs.
2090 Changes in version 0.1.1.7-alpha - 2005-09-14
2091 o Fixes on 0.1.1.6-alpha:
2092 - Exit servers were crashing when people asked them to make a
2093 connection to an address not in their exit policy.
2094 - Looking up a non-existent stream for a v1 control connection would
2096 - Fix a seg fault if we ask a dirserver for a descriptor by
2097 fingerprint but he doesn't know about him.
2098 - SETCONF was appending items to linelists, not clearing them.
2099 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
2100 out and refuse the setconf if it would fail.
2101 - Downgrade the dirserver log messages when whining about
2105 - Add Peter Palfrader's check-tor script to tor/contrib/
2106 It lets you easily check whether a given server (referenced by
2107 nickname) is reachable by you.
2108 - Numerous changes to move towards client-side v2 directories. Not
2112 - If the user gave tor an odd number of command-line arguments,
2113 we were silently ignoring the last one. Now we complain and fail.
2114 [This wins the oldest-bug prize -- this bug has been present since
2115 November 2002, as released in Tor 0.0.0.]
2116 - Do not use unaligned memory access on alpha, mips, or mipsel.
2117 It *works*, but is very slow, so we treat them as if it doesn't.
2118 - Retry directory requests if we fail to get an answer we like
2119 from a given dirserver (we were retrying before, but only if
2120 we fail to connect).
2121 - When writing the RecommendedVersions line, sort them first.
2122 - When the client asked for a rendezvous port that the hidden
2123 service didn't want to provide, we were sending an IP address
2124 back along with the end cell. Fortunately, it was zero. But stop
2126 - Correct "your server is reachable" log entries to indicate that
2127 it was self-testing that told us so.
2130 Changes in version 0.1.1.6-alpha - 2005-09-09
2131 o Fixes on 0.1.1.5-alpha:
2132 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
2133 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
2134 - Fix bug with tor_memmem finding a match at the end of the string.
2135 - Make unit tests run without segfaulting.
2136 - Resolve some solaris x86 compile warnings.
2137 - Handle duplicate lines in approved-routers files without warning.
2138 - Fix bug where as soon as a server refused any requests due to his
2139 exit policy (e.g. when we ask for localhost and he tells us that's
2140 127.0.0.1 and he won't do it), we decided he wasn't obeying his
2141 exit policy using him for any exits.
2142 - Only do openssl hardware accelerator stuff if openssl version is
2145 o New controller features/fixes:
2146 - Add a "RESETCONF" command so you can set config options like
2147 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
2148 a config option in the torrc with no value, then it clears it
2149 entirely (rather than setting it to its default).
2150 - Add a "GETINFO config-file" to tell us where torrc is.
2151 - Avoid sending blank lines when GETINFO replies should be empty.
2152 - Add a QUIT command for the controller (for using it manually).
2153 - Fix a bug in SAVECONF that was adding default dirservers and
2154 other redundant entries to the torrc file.
2156 o Start on the new directory design:
2157 - Generate, publish, cache, serve new network-status format.
2158 - Publish individual descriptors (by fingerprint, by "all", and by
2160 - Publish client and server recommended versions separately.
2161 - Allow tor_gzip_uncompress() to handle multiple concatenated
2162 compressed strings. Serve compressed groups of router
2163 descriptors. The compression logic here could be more
2165 - Distinguish v1 authorities (all currently trusted directories)
2166 from v2 authorities (all trusted directories).
2167 - Change DirServers config line to note which dirs are v1 authorities.
2168 - Add configuration option "V1AuthoritativeDirectory 1" which
2169 moria1, moria2, and tor26 should set.
2170 - Remove option when getting directory cache to see whether they
2171 support running-routers; they all do now. Replace it with one
2172 to see whether caches support v2 stuff.
2175 - Dirservers now do their own external reachability testing of each
2176 Tor server, and only list them as running if they've been found to
2177 be reachable. We also send back warnings to the server's logs if
2178 it uploads a descriptor that we already believe is unreachable.
2179 - Implement exit enclaves: if we know an IP address for the
2180 destination, and there's a running Tor server at that address
2181 which allows exit to the destination, then extend the circuit to
2182 that exit first. This provides end-to-end encryption and end-to-end
2183 authentication. Also, if the user wants a .exit address or enclave,
2184 use 4 hops rather than 3, and cannibalize a general circ for it
2186 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
2187 controller. Also, rotate dns and cpu workers if the controller
2188 changes options that will affect them; and initialize the dns
2189 worker cache tree whether or not we start out as a server.
2190 - Only upload a new server descriptor when options change, 18
2191 hours have passed, uptime is reset, or bandwidth changes a lot.
2192 - Check [X-]Forwarded-For headers in HTTP requests when generating
2193 log messages. This lets people run dirservers (and caches) behind
2194 Apache but still know which IP addresses are causing warnings.
2196 o Config option changes:
2197 - Replace (Fascist)Firewall* config options with a new
2198 ReachableAddresses option that understands address policies.
2199 For example, "ReachableAddresses *:80,*:443"
2200 - Get rid of IgnoreVersion undocumented config option, and make us
2201 only warn, never exit, when we're running an obsolete version.
2202 - Make MonthlyAccountingStart config option truly obsolete now.
2205 - Reject ports 465 and 587 in the default exit policy, since
2206 people have started using them for spam too.
2207 - It turns out we couldn't bootstrap a network since we added
2208 reachability detection in 0.1.0.1-rc. Good thing the Tor network
2209 has never gone down. Add an AssumeReachable config option to let
2210 servers and dirservers bootstrap. When we're trying to build a
2211 high-uptime or high-bandwidth circuit but there aren't enough
2212 suitable servers, try being less picky rather than simply failing.
2213 - Our logic to decide if the OR we connected to was the right guy
2214 was brittle and maybe open to a mitm for unverified routers.
2215 - We weren't cannibalizing circuits correctly for
2216 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
2217 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
2218 build those from scratch. This should make hidden services faster.
2219 - Predict required circuits better, with an eye toward making hidden
2220 services faster on the service end.
2221 - Retry streams if the exit node sends back a 'misc' failure. This
2222 should result in fewer random failures. Also, after failing
2223 from resolve failed or misc, reset the num failures, so we give
2224 it a fair shake next time we try.
2225 - Clean up the rendezvous warn log msgs, and downgrade some to info.
2226 - Reduce severity on logs about dns worker spawning and culling.
2227 - When we're shutting down and we do something like try to post a
2228 server descriptor or rendezvous descriptor, don't complain that
2229 we seem to be unreachable. Of course we are, we're shutting down.
2230 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
2231 We don't use them yet, but maybe one day our DNS resolver will be
2232 able to discover them.
2233 - Make ContactInfo mandatory for authoritative directory servers.
2234 - Require server descriptors to list IPv4 addresses -- hostnames
2235 are no longer allowed. This also fixes some potential security
2236 problems with people providing hostnames as their address and then
2237 preferentially resolving them to partition users.
2238 - Change log line for unreachability to explicitly suggest /etc/hosts
2239 as the culprit. Also make it clearer what IP address and ports we're
2240 testing for reachability.
2241 - Put quotes around user-supplied strings when logging so users are
2242 more likely to realize if they add bad characters (like quotes)
2244 - Let auth dir servers start without specifying an Address config
2246 - Make unit tests (and other invocations that aren't the real Tor)
2247 run without launching listeners, creating subdirectories, and so on.
2250 Changes in version 0.1.1.5-alpha - 2005-08-08
2251 o Bugfixes included in 0.1.0.14.
2253 o Bugfixes on 0.1.0.x:
2254 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
2255 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
2256 it would silently using ignore the 6668.
2259 Changes in version 0.1.0.14 - 2005-08-08
2260 o Bugfixes on 0.1.0.x:
2261 - Fix the other half of the bug with crypto handshakes
2263 - Fix an assert trigger if you send a 'signal term' via the
2264 controller when it's listening for 'event info' messages.
2267 Changes in version 0.1.1.4-alpha - 2005-08-04
2268 o Bugfixes included in 0.1.0.13.
2271 - Improve tor_gettimeofday() granularity on windows.
2272 - Make clients regenerate their keys when their IP address changes.
2273 - Implement some more GETINFO goodness: expose helper nodes, config
2274 options, getinfo keys.
2277 Changes in version 0.1.0.13 - 2005-08-04
2278 o Bugfixes on 0.1.0.x:
2279 - Fix a critical bug in the security of our crypto handshakes.
2280 - Fix a size_t underflow in smartlist_join_strings2() that made
2281 it do bad things when you hand it an empty smartlist.
2282 - Fix Windows installer to ship Tor license (thanks to Aphex for
2283 pointing out this oversight) and put a link to the doc directory
2285 - Explicitly set no-unaligned-access for sparc: it turns out the
2286 new gcc's let you compile broken code, but that doesn't make it
2290 Changes in version 0.1.1.3-alpha - 2005-07-23
2291 o Bugfixes on 0.1.1.2-alpha:
2292 - Fix a bug in handling the controller's "post descriptor"
2294 - Fix several bugs in handling the controller's "extend circuit"
2296 - Fix a bug in handling the controller's "stream status" event.
2297 - Fix an assert failure if we have a controller listening for
2298 circuit events and we go offline.
2299 - Re-allow hidden service descriptors to publish 0 intro points.
2300 - Fix a crash when generating your hidden service descriptor if
2301 you don't have enough intro points already.
2303 o New features on 0.1.1.2-alpha:
2304 - New controller function "getinfo accounting", to ask how
2305 many bytes we've used in this time period.
2306 - Experimental support for helper nodes: a lot of the risk from
2307 a small static adversary comes because users pick new random
2308 nodes every time they rebuild a circuit. Now users will try to
2309 stick to the same small set of entry nodes if they can. Not
2310 enabled by default yet.
2312 o Bugfixes on 0.1.0.12:
2313 - If you're an auth dir server, always publish your dirport,
2314 even if you haven't yet found yourself to be reachable.
2315 - Fix a size_t underflow in smartlist_join_strings2() that made
2316 it do bad things when you hand it an empty smartlist.
2319 Changes in version 0.1.0.12 - 2005-07-18
2320 o New directory servers:
2321 - tor26 has changed IP address.
2323 o Bugfixes on 0.1.0.x:
2324 - Fix a possible double-free in tor_gzip_uncompress().
2325 - When --disable-threads is set, do not search for or link against
2327 - Don't trigger an assert if an authoritative directory server
2328 claims its dirport is 0.
2329 - Fix bug with removing Tor as an NT service: some people were
2330 getting "The service did not return an error." Thanks to Matt
2334 Changes in version 0.1.1.2-alpha - 2005-07-15
2335 o New directory servers:
2336 - tor26 has changed IP address.
2338 o Bugfixes on 0.1.0.x, crashes/leaks:
2339 - Port the servers-not-obeying-their-exit-policies fix from
2341 - Fix an fd leak in start_daemon().
2342 - On Windows, you can't always reopen a port right after you've
2343 closed it. So change retry_listeners() to only close and re-open
2344 ports that have changed.
2345 - Fix a possible double-free in tor_gzip_uncompress().
2347 o Bugfixes on 0.1.0.x, usability:
2348 - When tor_socketpair() fails in Windows, give a reasonable
2349 Windows-style errno back.
2350 - Let people type "tor --install" as well as "tor -install" when
2352 want to make it an NT service.
2353 - NT service patch from Matt Edman to improve error messages.
2354 - When the controller asks for a config option with an abbreviated
2355 name, give the full name in our response.
2356 - Correct the man page entry on TrackHostExitsExpire.
2357 - Looks like we were never delivering deflated (i.e. compressed)
2358 running-routers lists, even when asked. Oops.
2359 - When --disable-threads is set, do not search for or link against
2362 o Bugfixes on 0.1.1.x:
2363 - Fix a seg fault with autodetecting which controller version is
2367 - New hidden service descriptor format: put a version in it, and
2368 let people specify introduction/rendezvous points that aren't
2369 in "the directory" (which is subjective anyway).
2370 - Allow the DEBUG controller event to work again. Mark certain log
2371 entries as "don't tell this to controllers", so we avoid cycles.
2374 Changes in version 0.1.0.11 - 2005-06-30
2375 o Bugfixes on 0.1.0.x:
2376 - Fix major security bug: servers were disregarding their
2377 exit policies if clients behaved unexpectedly.
2378 - Make OS X init script check for missing argument, so we don't
2379 confuse users who invoke it incorrectly.
2380 - Fix a seg fault in "tor --hash-password foo".
2381 - The MAPADDRESS control command was broken.
2384 Changes in version 0.1.1.1-alpha - 2005-06-29
2386 - Make OS X init script check for missing argument, so we don't
2387 confuse users who invoke it incorrectly.
2388 - Fix a seg fault in "tor --hash-password foo".
2389 - Fix a possible way to DoS dirservers.
2390 - When we complain that your exit policy implicitly allows local or
2391 private address spaces, name them explicitly so operators can
2393 - Make the log message less scary when all the dirservers are
2394 temporarily unreachable.
2395 - We were printing the number of idle dns workers incorrectly when
2399 - Revised controller protocol (version 1) that uses ascii rather
2400 than binary. Add supporting libraries in python and java so you
2401 can use the controller from your applications without caring how
2403 - Spiffy new support for crypto hardware accelerators. Can somebody
2407 Changes in version 0.0.9.10 - 2005-06-16
2408 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
2409 - Refuse relay cells that claim to have a length larger than the
2410 maximum allowed. This prevents a potential attack that could read
2411 arbitrary memory (e.g. keys) from an exit server's process
2415 Changes in version 0.1.0.10 - 2005-06-14
2416 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
2417 libevent before 1.1a.
2420 Changes in version 0.1.0.9-rc - 2005-06-09
2422 - Reset buf->highwater every time buf_shrink() is called, not just on
2423 a successful shrink. This was causing significant memory bloat.
2424 - Fix buffer overflow when checking hashed passwords.
2425 - Security fix: if seeding the RNG on Win32 fails, quit.
2426 - Allow seeding the RNG on Win32 even when you're not running as
2428 - Disable threading on Solaris too. Something is wonky with it,
2429 cpuworkers, and reentrant libs.
2430 - Reenable the part of the code that tries to flush as soon as an
2431 OR outbuf has a full TLS record available. Perhaps this will make
2432 OR outbufs not grow as huge except in rare cases, thus saving lots
2433 of CPU time plus memory.
2434 - Reject malformed .onion addresses rather then passing them on as
2435 normal web requests.
2436 - Adapt patch from Adam Langley: fix possible memory leak in
2437 tor_lookup_hostname().
2438 - Initialize libevent later in the startup process, so the logs are
2439 already established by the time we start logging libevent warns.
2440 - Use correct errno on win32 if libevent fails.
2441 - Check and warn about known-bad/slow libevent versions.
2442 - Pay more attention to the ClientOnly config option.
2443 - Have torctl.in/tor.sh.in check for location of su binary (needed
2445 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
2446 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
2447 HttpProxyAuthenticator
2448 - Stop warning about sigpipes in the logs. We're going to
2449 pretend that getting these occassionally is normal and fine.
2450 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
2452 installer screens; and don't put stuff into StartupItems unless
2453 the user asks you to.
2454 - Require servers that use the default dirservers to have public IP
2455 addresses. We have too many servers that are configured with private
2456 IPs and their admins never notice the log entries complaining that
2457 their descriptors are being rejected.
2458 - Add OSX uninstall instructions. An actual uninstall script will
2462 Changes in version 0.1.0.8-rc - 2005-05-23
2464 - It turns out that kqueue on OS X 10.3.9 was causing kernel
2465 panics. Disable kqueue on all OS X Tors.
2466 - Fix RPM: remove duplicate line accidentally added to the rpm
2468 - Disable threads on openbsd too, since its gethostaddr is not
2470 - Tolerate libevent 0.8 since it still works, even though it's
2472 - Enable building on Red Hat 9.0 again.
2473 - Allow the middle hop of the testing circuit to be running any
2474 version, now that most of them have the bugfix to let them connect
2475 to unknown servers. This will allow reachability testing to work
2476 even when 0.0.9.7-0.0.9.9 become obsolete.
2477 - Handle relay cells with rh.length too large. This prevents
2478 a potential attack that could read arbitrary memory (maybe even
2479 keys) from the exit server's process.
2480 - We screwed up the dirport reachability testing when we don't yet
2481 have a cached version of the directory. Hopefully now fixed.
2482 - Clean up router_load_single_router() (used by the controller),
2483 so it doesn't seg fault on error.
2484 - Fix a minor memory leak when somebody establishes an introduction
2485 point at your Tor server.
2486 - If a socks connection ends because read fails, don't warn that
2487 you're not sending a socks reply back.
2490 - Add HttpProxyAuthenticator config option too, that works like
2491 the HttpsProxyAuthenticator config option.
2492 - Encode hashed controller passwords in hex instead of base64,
2493 to make it easier to write controllers.
2496 Changes in version 0.1.0.7-rc - 2005-05-17
2498 - Fix a bug in the OS X package installer that prevented it from
2499 installing on Tiger.
2500 - Fix a script bug in the OS X package installer that made it
2501 complain during installation.
2502 - Find libevent even if it's hiding in /usr/local/ and your
2503 CFLAGS and LDFLAGS don't tell you to look there.
2504 - Be able to link with libevent as a shared library (the default
2505 after 1.0d), even if it's hiding in /usr/local/lib and even
2506 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
2507 assuming you're running gcc. Otherwise fail and give a useful
2509 - Fix a bug in the RPM packager: set home directory for _tor to
2510 something more reasonable when first installing.
2511 - Free a minor amount of memory that is still reachable on exit.
2514 Changes in version 0.1.0.6-rc - 2005-05-14
2516 - Implement --disable-threads configure option. Disable threads on
2517 netbsd by default, because it appears to have no reentrant resolver
2519 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
2520 release (1.1) detects and disables kqueue if it's broken.
2521 - Append default exit policy before checking for implicit internal
2522 addresses. Now we don't log a bunch of complaints on startup
2523 when using the default exit policy.
2524 - Some people were putting "Address " in their torrc, and they had
2525 a buggy resolver that resolved " " to 0.0.0.0. Oops.
2526 - If DataDir is ~/.tor, and that expands to /.tor, then default to
2527 LOCALSTATEDIR/tor instead.
2528 - Fix fragmented-message bug in TorControl.py.
2529 - Resolve a minor bug which would prevent unreachable dirports
2530 from getting suppressed in the published descriptor.
2531 - When the controller gave us a new descriptor, we weren't resolving
2532 it immediately, so Tor would think its address was 0.0.0.0 until
2533 we fetched a new directory.
2534 - Fix an uppercase/lowercase case error in suppressing a bogus
2535 libevent warning on some Linuxes.
2538 - Begin scrubbing sensitive strings from logs by default. Turn off
2539 the config option SafeLogging if you need to do debugging.
2540 - Switch to a new buffer management algorithm, which tries to avoid
2541 reallocing and copying quite as much. In first tests it looks like
2542 it uses *more* memory on average, but less cpu.
2543 - First cut at support for "create-fast" cells. Clients can use
2544 these when extending to their first hop, since the TLS already
2545 provides forward secrecy and authentication. Not enabled on
2547 - When dirservers refuse a router descriptor, we now log its
2548 contactinfo, platform, and the poster's IP address.
2549 - Call tor_free_all instead of connections_free_all after forking, to
2550 save memory on systems that need to fork.
2551 - Whine at you if you're a server and you don't set your contactinfo.
2552 - Implement --verify-config command-line option to check if your torrc
2553 is valid without actually launching Tor.
2554 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
2555 rather than just rejecting it.
2558 Changes in version 0.1.0.5-rc - 2005-04-27
2560 - Stop trying to print a null pointer if an OR conn fails because
2561 we didn't like its cert.
2563 - Switch our internal buffers implementation to use a ring buffer,
2564 to hopefully improve performance for fast servers a lot.
2565 - Add HttpsProxyAuthenticator support (basic auth only), based
2566 on patch from Adam Langley.
2567 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
2568 the fast servers that have been joining lately.
2569 - Give hidden service accesses extra time on the first attempt,
2570 since 60 seconds is often only barely enough. This might improve
2572 - Improve performance for dirservers: stop re-parsing the whole
2573 directory every time you regenerate it.
2574 - Add more debugging info to help us find the weird dns freebsd
2575 pthreads bug; cleaner debug messages to help track future issues.
2578 Changes in version 0.0.9.9 - 2005-04-23
2579 o Bugfixes on 0.0.9.x:
2580 - If unofficial Tor clients connect and send weird TLS certs, our
2581 Tor server triggers an assert. This release contains a minimal
2582 backport from the broader fix that we put into 0.1.0.4-rc.
2585 Changes in version 0.1.0.4-rc - 2005-04-23
2587 - If unofficial Tor clients connect and send weird TLS certs, our
2588 Tor server triggers an assert. Stop asserting, and start handling
2589 TLS errors better in other situations too.
2590 - When the controller asks us to tell it about all the debug-level
2591 logs, it turns out we were generating debug-level logs while
2592 telling it about them, which turns into a bad loop. Now keep
2593 track of whether you're sending a debug log to the controller,
2594 and don't log when you are.
2595 - Fix the "postdescriptor" feature of the controller interface: on
2596 non-complete success, only say "done" once.
2598 - Clients are now willing to load balance over up to 2mB, not 1mB,
2599 of advertised bandwidth capacity.
2600 - Add a NoPublish config option, so you can be a server (e.g. for
2601 testing running Tor servers in other Tor networks) without
2602 publishing your descriptor to the primary dirservers.
2605 Changes in version 0.1.0.3-rc - 2005-04-08
2606 o Improvements on 0.1.0.2-rc:
2607 - Client now retries when streams end early for 'hibernating' or
2608 'resource limit' reasons, rather than failing them.
2609 - More automated handling for dirserver operators:
2610 - Automatically approve nodes running 0.1.0.2-rc or later,
2611 now that the the reachability detection stuff is working.
2612 - Now we allow two unverified servers with the same nickname
2613 but different keys. But if a nickname is verified, only that
2614 nickname+key are allowed.
2615 - If you're an authdirserver connecting to an address:port,
2616 and it's not the OR you were expecting, forget about that
2617 descriptor. If he *was* the one you were expecting, then forget
2618 about all other descriptors for that address:port.
2619 - Allow servers to publish descriptors from 12 hours in the future.
2620 Corollary: only whine about clock skew from the dirserver if
2621 he's a trusted dirserver (since now even verified servers could
2622 have quite wrong clocks).
2623 - Adjust maximum skew and age for rendezvous descriptors: let skew
2624 be 48 hours rather than 90 minutes.
2625 - Efficiency improvements:
2626 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
2627 it much faster to look up a circuit for each relay cell.
2628 - Remove most calls to assert_all_pending_dns_resolves_ok(),
2629 since they're eating our cpu on exit nodes.
2630 - Stop wasting time doing a case insensitive comparison for every
2631 dns name every time we do any lookup. Canonicalize the names to
2632 lowercase and be done with it.
2633 - Start sending 'truncated' cells back rather than destroy cells,
2634 if the circuit closes in front of you. This means we won't have
2635 to abandon partially built circuits.
2636 - Only warn once per nickname from add_nickname_list_to_smartlist
2637 per failure, so an entrynode or exitnode choice that's down won't
2639 - Put a note in the torrc about abuse potential with the default
2641 - Revise control spec and implementation to allow all log messages to
2642 be sent to controller with their severities intact (suggested by
2643 Matt Edman). Update TorControl to handle new log event types.
2644 - Provide better explanation messages when controller's POSTDESCRIPTOR
2646 - Stop putting nodename in the Platform string in server descriptors.
2647 It doesn't actually help, and it is confusing/upsetting some people.
2649 o Bugfixes on 0.1.0.2-rc:
2650 - We were printing the host mask wrong in exit policies in server
2651 descriptors. This isn't a critical bug though, since we were still
2652 obeying the exit policy internally.
2653 - Fix Tor when compiled with libevent but without pthreads: move
2654 connection_unregister() from _connection_free() to
2656 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
2657 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
2658 when we look through the connection array, we'll find any of the
2659 cpu/dnsworkers. This is no good.
2661 o Bugfixes on 0.0.9.8:
2662 - Fix possible bug on threading platforms (e.g. win32) which was
2663 leaking a file descriptor whenever a cpuworker or dnsworker died.
2664 - When using preferred entry or exit nodes, ignore whether the
2665 circuit wants uptime or capacity. They asked for the nodes, they
2667 - chdir() to your datadirectory at the *end* of the daemonize process,
2668 not the beginning. This was a problem because the first time you
2669 run tor, if your datadir isn't there, and you have runasdaemon set
2670 to 1, it will try to chdir to it before it tries to create it. Oops.
2671 - Handle changed router status correctly when dirserver reloads
2672 fingerprint file. We used to be dropping all unverified descriptors
2673 right then. The bug was hidden because we would immediately
2674 fetch a directory from another dirserver, which would include the
2675 descriptors we just dropped.
2676 - When we're connecting to an OR and he's got a different nickname/key
2677 than we were expecting, only complain loudly if we're an OP or a
2678 dirserver. Complaining loudly to the OR admins just confuses them.
2679 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
2680 artificially capped at 500kB.
2683 Changes in version 0.0.9.8 - 2005-04-07
2684 o Bugfixes on 0.0.9.x:
2685 - We have a bug that I haven't found yet. Sometimes, very rarely,
2686 cpuworkers get stuck in the 'busy' state, even though the cpuworker
2687 thinks of itself as idle. This meant that no new circuits ever got
2688 established. Here's a workaround to kill any cpuworker that's been
2689 busy for more than 100 seconds.
2692 Changes in version 0.1.0.2-rc - 2005-04-01
2693 o Bugfixes on 0.1.0.1-rc:
2694 - Fixes on reachability detection:
2695 - Don't check for reachability while hibernating.
2696 - If ORPort is reachable but DirPort isn't, still publish the
2697 descriptor, but zero out DirPort until it's found reachable.
2698 - When building testing circs for ORPort testing, use only
2699 high-bandwidth nodes, so fewer circuits fail.
2700 - Complain about unreachable ORPort separately from unreachable
2701 DirPort, so the user knows what's going on.
2702 - Make sure we only conclude ORPort reachability if we didn't
2703 initiate the conn. Otherwise we could falsely conclude that
2704 we're reachable just because we connected to the guy earlier
2705 and he used that same pipe to extend to us.
2706 - Authdirservers shouldn't do ORPort reachability detection,
2707 since they're in clique mode, so it will be rare to find a
2708 server not already connected to them.
2709 - When building testing circuits, always pick middle hops running
2710 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
2711 bug. (This is a kludge; it will go away when 0.0.9.x becomes
2713 - When we decide we're reachable, actually publish our descriptor
2715 - Fix bug in redirectstream in the controller.
2716 - Fix the state descriptor strings so logs don't claim edge streams
2717 are in a different state than they actually are.
2718 - Use recent libevent features when possible (this only really affects
2719 win32 and osx right now, because the new libevent with these
2720 features hasn't been released yet). Add code to suppress spurious
2722 - Prevent possible segfault in connection_close_unattached_ap().
2723 - Fix newlines on torrc in win32.
2724 - Improve error msgs when tor-resolve fails.
2726 o Improvements on 0.0.9.x:
2727 - New experimental script tor/contrib/ExerciseServer.py (needs more
2728 work) that uses the controller interface to build circuits and
2729 fetch pages over them. This will help us bootstrap servers that
2730 have lots of capacity but haven't noticed it yet.
2731 - New experimental script tor/contrib/PathDemo.py (needs more work)
2732 that uses the controller interface to let you choose whole paths
2734 "<hostname>.<path,separated by dots>.<length of path>.path"
2735 - When we've connected to an OR and handshaked but didn't like
2736 the result, we were closing the conn without sending destroy
2737 cells back for pending circuits. Now send those destroys.
2740 Changes in version 0.0.9.7 - 2005-04-01
2741 o Bugfixes on 0.0.9.x:
2742 - Fix another race crash bug (thanks to Glenn Fink for reporting).
2743 - Compare identity to identity, not to nickname, when extending to
2744 a router not already in the directory. This was preventing us from
2745 extending to unknown routers. Oops.
2746 - Make sure to create OS X Tor user in <500 range, so we aren't
2747 creating actual system users.
2748 - Note where connection-that-hasn't-sent-end was marked, and fix
2749 a few really loud instances of this harmless bug (it's fixed more
2753 Changes in version 0.1.0.1-rc - 2005-03-28
2755 - Add reachability testing. Your Tor server will automatically try
2756 to see if its ORPort and DirPort are reachable from the outside,
2757 and it won't upload its descriptor until it decides they are.
2758 - Handle unavailable hidden services better. Handle slow or busy
2759 hidden services better.
2760 - Add support for CONNECTing through https proxies, with "HttpsProxy"
2762 - New exit policy: accept most low-numbered ports, rather than
2763 rejecting most low-numbered ports.
2764 - More Tor controller support (still experimental). See
2765 http://tor.eff.org/doc/control-spec.txt for all the new features,
2766 including signals to emulate unix signals from any platform;
2767 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
2768 closestream; closecircuit; etc.
2769 - Make nt services work and start on startup on win32 (based on
2770 patch by Matt Edman).
2771 - Add a new AddressMap config directive to rewrite incoming socks
2772 addresses. This lets you, for example, declare an implicit
2773 required exit node for certain sites.
2774 - Add a new TrackHostExits config directive to trigger addressmaps
2775 for certain incoming socks addresses -- for sites that break when
2776 your exit keeps changing (based on patch by Mike Perry).
2777 - Redo the client-side dns cache so it's just an addressmap too.
2778 - Notice when our IP changes, and reset stats/uptime/reachability.
2779 - When an application is using socks5, give him the whole variety of
2780 potential socks5 responses (connect refused, host unreachable, etc),
2781 rather than just "success" or "failure".
2782 - A more sane version numbering system. See
2783 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
2784 - New contributed script "exitlist": a simple python script to
2785 parse directories and find Tor nodes that exit to listed
2787 - New contributed script "privoxy-tor-toggle" to toggle whether
2788 Privoxy uses Tor. Seems to be configured for Debian by default.
2789 - Report HTTP reasons to client when getting a response from directory
2790 servers -- so you can actually know what went wrong.
2791 - New config option MaxAdvertisedBandwidth which lets you advertise
2792 a low bandwidthrate (to not attract as many circuits) while still
2793 allowing a higher bandwidthrate in reality.
2795 o Robustness/stability fixes:
2796 - Make Tor use Niels Provos's libevent instead of its current
2797 poll-but-sometimes-select mess. This will let us use faster async
2798 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
2800 - pthread support now too. This was forced because when we forked,
2801 we ended up wasting a lot of duplicate ram over time. Also switch
2802 to foo_r versions of some library calls to allow reentry and
2804 - Better handling for heterogeneous / unreliable nodes:
2805 - Annotate circuits w/ whether they aim to contain high uptime nodes
2806 and/or high capacity nodes. When building circuits, choose
2808 - This means that every single node in an intro rend circuit,
2809 not just the last one, will have a minimum uptime.
2810 - New config option LongLivedPorts to indicate application streams
2811 that will want high uptime circuits.
2812 - Servers reset uptime when a dir fetch entirely fails. This
2813 hopefully reflects stability of the server's network connectivity.
2814 - If somebody starts his tor server in Jan 2004 and then fixes his
2815 clock, don't make his published uptime be a year.
2816 - Reset published uptime when you wake up from hibernation.
2817 - Introduce a notion of 'internal' circs, which are chosen without
2818 regard to the exit policy of the last hop. Intro and rendezvous
2819 circs must be internal circs, to avoid leaking information. Resolve
2820 and connect streams can use internal circs if they want.
2821 - New circuit pooling algorithm: make sure to have enough circs around
2822 to satisfy any predicted ports, and also make sure to have 2 internal
2823 circs around if we've required internal circs lately (and with high
2824 uptime if we've seen that lately too).
2825 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
2826 which describes how often we retry making new circuits if current
2827 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
2828 how long we're willing to make use of an already-dirty circuit.
2829 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
2830 circ as necessary, if there are any completed ones lying around
2831 when we try to launch one.
2832 - Make hidden services try to establish a rendezvous for 30 seconds,
2833 rather than for n (where n=3) attempts to build a circuit.
2834 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
2835 "ShutdownWaitLength".
2836 - Try to be more zealous about calling connection_edge_end when
2837 things go bad with edge conns in connection.c.
2838 - Revise tor-spec to add more/better stream end reasons.
2839 - Revise all calls to connection_edge_end to avoid sending "misc",
2840 and to take errno into account where possible.
2843 - Fix a race condition that can trigger an assert, when we have a
2844 pending create cell and an OR connection fails right then.
2845 - Fix several double-mark-for-close bugs, e.g. where we were finding
2846 a conn for a cell even if that conn is already marked for close.
2847 - Make sequence of log messages when starting on win32 with no config
2848 file more reasonable.
2849 - When choosing an exit node for a new non-internal circ, don't take
2850 into account whether it'll be useful for any pending x.onion
2851 addresses -- it won't.
2852 - Turn addr_policy_compare from a tristate to a quadstate; this should
2853 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
2854 for google.com" problem.
2855 - Make "platform" string in descriptor more accurate for Win32 servers,
2856 so it's not just "unknown platform".
2857 - Fix an edge case in parsing config options (thanks weasel).
2858 If they say "--" on the commandline, it's not an option.
2859 - Reject odd-looking addresses at the client (e.g. addresses that
2860 contain a colon), rather than having the server drop them because
2862 - tor-resolve requests were ignoring .exit if there was a working circuit
2863 they could use instead.
2864 - REUSEADDR on normal platforms means you can rebind to the port
2865 right after somebody else has let it go. But REUSEADDR on win32
2866 means to let you bind to the port _even when somebody else
2867 already has it bound_! So, don't do that on Win32.
2868 - Change version parsing logic: a version is "obsolete" if it is not
2869 recommended and (1) there is a newer recommended version in the
2870 same series, or (2) there are no recommended versions in the same
2871 series, but there are some recommended versions in a newer series.
2872 A version is "new" if it is newer than any recommended version in
2874 - Stop most cases of hanging up on a socks connection without sending
2878 - Require BandwidthRate to be at least 20kB/s for servers.
2879 - When a dirserver causes you to give a warn, mention which dirserver
2881 - New config option DirAllowPrivateAddresses for authdirservers.
2882 Now by default they refuse router descriptors that have non-IP or
2883 private-IP addresses.
2884 - Stop publishing socksport in the directory, since it's not
2885 actually meant to be public. For compatibility, publish a 0 there
2887 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
2888 smart" value, that is low for servers and high for clients.
2889 - If our clock jumps forward by 100 seconds or more, assume something
2890 has gone wrong with our network and abandon all not-yet-used circs.
2891 - Warn when exit policy implicitly allows local addresses.
2892 - If we get an incredibly skewed timestamp from a dirserver mirror
2893 that isn't a verified OR, don't warn -- it's probably him that's
2895 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
2896 cookies to disk and doesn't log each web request to disk. (Thanks
2897 to Brett Carrington for pointing this out.)
2898 - When a client asks us for a dir mirror and we don't have one,
2899 launch an attempt to get a fresh one.
2900 - If we're hibernating and we get a SIGINT, exit immediately.
2901 - Add --with-dmalloc ./configure option, to track memory leaks.
2902 - And try to free all memory on closing, so we can detect what
2904 - Cache local dns resolves correctly even when they're .exit
2906 - Give a better warning when some other server advertises an
2907 ORPort that is actually an apache running ssl.
2908 - Add "opt hibernating 1" to server descriptor to make it clearer
2909 whether the server is hibernating.
2912 Changes in version 0.0.9.6 - 2005-03-24
2913 o Bugfixes on 0.0.9.x (crashes and asserts):
2914 - Add new end stream reasons to maintainance branch. Fix bug where
2915 reason (8) could trigger an assert. Prevent bug from recurring.
2916 - Apparently win32 stat wants paths to not end with a slash.
2917 - Fix assert triggers in assert_cpath_layer_ok(), where we were
2918 blowing away the circuit that conn->cpath_layer points to, then
2919 checking to see if the circ is well-formed. Backport check to make
2920 sure we dont use the cpath on a closed connection.
2921 - Prevent circuit_resume_edge_reading_helper() from trying to package
2922 inbufs for marked-for-close streams.
2923 - Don't crash on hup if your options->address has become unresolvable.
2924 - Some systems (like OS X) sometimes accept() a connection and tell
2925 you the remote host is 0.0.0.0:0. If this happens, due to some
2926 other mis-features, we get confused; so refuse the conn for now.
2928 o Bugfixes on 0.0.9.x (other):
2929 - Fix harmless but scary "Unrecognized content encoding" warn message.
2930 - Add new stream error reason: TORPROTOCOL reason means "you are not
2931 speaking a version of Tor I understand; say bye-bye to your stream."
2932 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
2933 into the future, now that we are more tolerant of skew. This
2934 resolves a bug where a Tor server would refuse to cache a directory
2935 because all the directories it gets are too far in the future;
2936 yet the Tor server never logs any complaints about clock skew.
2937 - Mac packaging magic: make man pages useable, and do not overwrite
2938 existing torrc files.
2939 - Make OS X log happily to /var/log/tor/tor.log
2942 Changes in version 0.0.9.5 - 2005-02-22
2943 o Bugfixes on 0.0.9.x:
2944 - Fix an assert race at exit nodes when resolve requests fail.
2945 - Stop picking unverified dir mirrors--it only leads to misery.
2946 - Patch from Matt Edman to make NT services work better. Service
2947 support is still not compiled into the executable by default.
2948 - Patch from Dmitri Bely so the Tor service runs better under
2949 the win32 SYSTEM account.
2950 - Make tor-resolve actually work (?) on Win32.
2951 - Fix a sign bug when getrlimit claims to have 4+ billion
2952 file descriptors available.
2953 - Stop refusing to start when bandwidthburst == bandwidthrate.
2954 - When create cells have been on the onion queue more than five
2955 seconds, just send back a destroy and take them off the list.
2958 Changes in version 0.0.9.4 - 2005-02-03
2959 o Bugfixes on 0.0.9:
2960 - Fix an assert bug that took down most of our servers: when
2961 a server claims to have 1 GB of bandwidthburst, don't
2963 - Don't crash as badly if we have spawned the max allowed number
2964 of dnsworkers, or we're out of file descriptors.
2965 - Block more file-sharing ports in the default exit policy.
2966 - MaxConn is now automatically set to the hard limit of max
2967 file descriptors we're allowed (ulimit -n), minus a few for
2969 - Give a clearer message when servers need to raise their
2970 ulimit -n when they start running out of file descriptors.
2971 - SGI Compatibility patches from Jan Schaumann.
2972 - Tolerate a corrupt cached directory better.
2973 - When a dirserver hasn't approved your server, list which one.
2974 - Go into soft hibernation after 95% of the bandwidth is used,
2975 not 99%. This is especially important for daily hibernators who
2976 have a small accounting max. Hopefully it will result in fewer
2977 cut connections when the hard hibernation starts.
2978 - Load-balance better when using servers that claim more than
2979 800kB/s of capacity.
2980 - Make NT services work (experimental, only used if compiled in).
2983 Changes in version 0.0.9.3 - 2005-01-21
2984 o Bugfixes on 0.0.9:
2985 - Backport the cpu use fixes from main branch, so busy servers won't
2986 need as much processor time.
2987 - Work better when we go offline and then come back, or when we
2988 run Tor at boot before the network is up. We do this by
2989 optimistically trying to fetch a new directory whenever an
2990 application request comes in and we think we're offline -- the
2991 human is hopefully a good measure of when the network is back.
2992 - Backport some minimal hidserv bugfixes: keep rend circuits open as
2993 long as you keep using them; actually publish hidserv descriptors
2994 shortly after they change, rather than waiting 20-40 minutes.
2995 - Enable Mac startup script by default.
2996 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
2997 - When you update AllowUnverifiedNodes or FirewallPorts via the
2998 controller's setconf feature, we were always appending, never
3000 - When you update HiddenServiceDir via setconf, it was screwing up
3001 the order of reading the lines, making it fail.
3002 - Do not rewrite a cached directory back to the cache; otherwise we
3003 will think it is recent and not fetch a newer one on startup.
3004 - Workaround for webservers that lie about Content-Encoding: Tor
3005 now tries to autodetect compressed directories and compression
3006 itself. This lets us Proxypass dir fetches through apache.
3009 Changes in version 0.0.9.2 - 2005-01-04
3010 o Bugfixes on 0.0.9 (crashes and asserts):
3011 - Fix an assert on startup when the disk is full and you're logging
3013 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
3014 style address, then we'd crash.
3015 - Fix an assert trigger when the running-routers string we get from
3016 a dirserver is broken.
3017 - Make worker threads start and run on win32. Now win32 servers
3019 - Bandaid (not actually fix, but now it doesn't crash) an assert
3020 where the dns worker dies mysteriously and the main Tor process
3021 doesn't remember anything about the address it was resolving.
3023 o Bugfixes on 0.0.9 (Win32):
3024 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
3025 name out of the warning/assert messages.
3026 - Fix a superficial "unhandled error on read" bug on win32.
3027 - The win32 installer no longer requires a click-through for our
3028 license, since our Free Software license grants rights but does not
3030 - Win32: When connecting to a dirserver fails, try another one
3031 immediately. (This was already working for non-win32 Tors.)
3032 - Stop trying to parse $HOME on win32 when hunting for default
3034 - Make tor-resolve.c work on win32 by calling network_init().
3036 o Bugfixes on 0.0.9 (other):
3037 - Make 0.0.9.x build on Solaris again.
3038 - Due to a fencepost error, we were blowing away the \n when reporting
3039 confvalue items in the controller. So asking for multiple config
3040 values at once couldn't work.
3041 - When listing circuits that are pending on an opening OR connection,
3042 if we're an OR we were listing circuits that *end* at us as
3043 being pending on every listener, dns/cpu worker, etc. Stop that.
3044 - Dirservers were failing to create 'running-routers' or 'directory'
3045 strings if we had more than some threshold of routers. Fix them so
3046 they can handle any number of routers.
3047 - Fix a superficial "Duplicate mark for close" bug.
3048 - Stop checking for clock skew for OR connections, even for servers.
3049 - Fix a fencepost error that was chopping off the last letter of any
3050 nickname that is the maximum allowed nickname length.
3051 - Update URLs in log messages so they point to the new website.
3052 - Fix a potential problem in mangling server private keys while
3053 writing to disk (not triggered yet, as far as we know).
3054 - Include the licenses for other free software we include in Tor,
3055 now that we're shipping binary distributions more regularly.
3058 Changes in version 0.0.9.1 - 2004-12-15
3059 o Bugfixes on 0.0.9:
3060 - Make hibernation actually work.
3061 - Make HashedControlPassword config option work.
3062 - When we're reporting event circuit status to a controller,
3063 don't use the stream status code.
3066 Changes in version 0.0.9 - 2004-12-12
3068 - Clean up manpage and torrc.sample file.
3069 - Clean up severities and text of log warnings.
3071 - Make servers trigger an assert when they enter hibernation.
3074 Changes in version 0.0.9rc7 - 2004-12-08
3075 o Bugfixes on 0.0.9rc:
3076 - Fix a stack-trashing crash when an exit node begins hibernating.
3077 - Avoid looking at unallocated memory while considering which
3078 ports we need to build circuits to cover.
3079 - Stop a sigpipe: when an 'end' cell races with eof from the app,
3080 we shouldn't hold-open-until-flush if the eof arrived first.
3081 - Fix a bug with init_cookie_authentication() in the controller.
3082 - When recommending new-format log lines, if the upper bound is
3083 LOG_ERR, leave it implicit.
3085 o Bugfixes on 0.0.8.1:
3086 - Fix a whole slew of memory leaks.
3087 - Fix isspace() and friends so they still make Solaris happy
3088 but also so they don't trigger asserts on win32.
3089 - Fix parse_iso_time on platforms without strptime (eg win32).
3090 - win32: tolerate extra "readable" events better.
3091 - win32: when being multithreaded, leave parent fdarray open.
3092 - Make unit tests work on win32.
3095 Changes in version 0.0.9rc6 - 2004-12-06
3096 o Bugfixes on 0.0.9pre:
3097 - Clean up some more integer underflow opportunities (not exploitable
3099 - While hibernating, hup should not regrow our listeners.
3100 - Send an end to the streams we close when we hibernate, rather
3101 than just chopping them off.
3102 - React to eof immediately on non-open edge connections.
3104 o Bugfixes on 0.0.8.1:
3105 - Calculate timeout for waiting for a connected cell from the time
3106 we sent the begin cell, not from the time the stream started. If
3107 it took a long time to establish the circuit, we would time out
3108 right after sending the begin cell.
3109 - Fix router_compare_addr_to_addr_policy: it was not treating a port
3110 of * as always matching, so we were picking reject *:* nodes as
3111 exit nodes too. Oops.
3114 - New circuit building strategy: keep a list of ports that we've
3115 used in the past 6 hours, and always try to have 2 circuits open
3116 or on the way that will handle each such port. Seed us with port
3117 80 so web users won't complain that Tor is "slow to start up".
3118 - Make kill -USR1 dump more useful stats about circuits.
3119 - When warning about retrying or giving up, print the address, so
3120 the user knows which one it's talking about.
3121 - If you haven't used a clean circuit in an hour, throw it away,
3122 just to be on the safe side. (This means after 6 hours a totally
3123 unused Tor client will have no circuits open.)
3126 Changes in version 0.0.9rc5 - 2004-12-01
3127 o Bugfixes on 0.0.8.1:
3128 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
3129 - Let resolve conns retry/expire also, rather than sticking around
3131 - If we are using select, make sure we stay within FD_SETSIZE.
3133 o Bugfixes on 0.0.9pre:
3134 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
3135 but doesn't seem to be currently; thanks to Ilja van Sprundel for
3137 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
3138 instead. Impose minima and maxima for all *Period options; impose
3139 even tighter maxima for fetching if we are a caching dirserver.
3140 Clip rather than rejecting.
3141 - Fetch cached running-routers from servers that serve it (that is,
3142 authdirservers and servers running 0.0.9rc5-cvs or later.)
3145 - Accept *:706 (silc) in default exit policy.
3146 - Implement new versioning format for post 0.1.
3147 - Support "foo.nickname.exit" addresses, to let Alice request the
3148 address "foo" as viewed by exit node "nickname". Based on a patch
3150 - Make tor --version --version dump the cvs Id of every file.
3153 Changes in version 0.0.9rc4 - 2004-11-28
3154 o Bugfixes on 0.0.8.1:
3155 - Make windows sockets actually non-blocking (oops), and handle
3156 win32 socket errors better.
3158 o Bugfixes on 0.0.9rc1:
3159 - Actually catch the -USR2 signal.
3162 Changes in version 0.0.9rc3 - 2004-11-25
3163 o Bugfixes on 0.0.8.1:
3164 - Flush the log file descriptor after we print "Tor opening log file",
3165 so we don't see those messages days later.
3167 o Bugfixes on 0.0.9rc1:
3168 - Make tor-resolve work again.
3169 - Avoid infinite loop in tor-resolve if tor hangs up on it.
3170 - Fix an assert trigger for clients/servers handling resolves.
3173 Changes in version 0.0.9rc2 - 2004-11-24
3174 o Bugfixes on 0.0.9rc1:
3175 - I broke socks5 support while fixing the eof bug.
3176 - Allow unitless bandwidths and intervals; they default to bytes
3178 - New servers don't start out hibernating; they are active until
3179 they run out of bytes, so they have a better estimate of how
3180 long it takes, and so their operators can know they're working.
3183 Changes in version 0.0.9rc1 - 2004-11-23
3184 o Bugfixes on 0.0.8.1:
3185 - Finally fix a bug that's been plaguing us for a year:
3186 With high load, circuit package window was reaching 0. Whenever
3187 we got a circuit-level sendme, we were reading a lot on each
3188 socket, but only writing out a bit. So we would eventually reach
3189 eof. This would be noticed and acted on even when there were still
3190 bytes sitting in the inbuf.
3191 - When poll() is interrupted, we shouldn't believe the revents values.
3193 o Bugfixes on 0.0.9pre6:
3194 - Fix hibernate bug that caused pre6 to be broken.
3195 - Don't keep rephist info for routers that haven't had activity for
3196 24 hours. (This matters now that clients have keys, since we track
3198 - Never call close_temp_logs while validating log options.
3199 - Fix backslash-escaping on tor.sh.in and torctl.in.
3202 - Implement weekly/monthly/daily accounting: now you specify your
3203 hibernation properties by
3204 AccountingMax N bytes|KB|MB|GB|TB
3205 AccountingStart day|week|month [day] HH:MM
3206 Defaults to "month 1 0:00".
3207 - Let bandwidth and interval config options be specified as 5 bytes,
3208 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
3209 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
3210 get back to normal.)
3211 - If your requested entry or exit node has advertised bandwidth 0,
3213 - Be more greedy about filling up relay cells -- we try reading again
3214 once we've processed the stuff we read, in case enough has arrived
3215 to fill the last cell completely.
3216 - Apply NT service patch from Osamu Fujino. Still needs more work.
3219 Changes in version 0.0.9pre6 - 2004-11-15
3220 o Bugfixes on 0.0.8.1:
3221 - Fix assert failure on malformed socks4a requests.
3222 - Use identity comparison, not nickname comparison, to choose which
3223 half of circuit-ID-space each side gets to use. This is needed
3224 because sometimes we think of a router as a nickname, and sometimes
3225 as a hex ID, and we can't predict what the other side will do.
3226 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
3227 write() call will fail and we handle it there.
3228 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
3229 and smartlist_len, which are two major profiling offenders.
3231 o Bugfixes on 0.0.9pre5:
3232 - Fix a bug in read_all that was corrupting config files on windows.
3233 - When we're raising the max number of open file descriptors to
3234 'unlimited', don't log that we just raised it to '-1'.
3235 - Include event code with events, as required by control-spec.txt.
3236 - Don't give a fingerprint when clients do --list-fingerprint:
3237 it's misleading, because it will never be the same again.
3238 - Stop using strlcpy in tor_strndup, since it was slowing us
3240 - Remove warn on startup about missing cached-directory file.
3241 - Make kill -USR1 work again.
3242 - Hibernate if we start tor during the "wait for wakeup-time" phase
3243 of an accounting interval. Log our hibernation plans better.
3244 - Authoritative dirservers now also cache their directory, so they
3245 have it on start-up.
3248 - Fetch running-routers; cache running-routers; compress
3249 running-routers; serve compressed running-routers.z
3250 - Add NSI installer script contributed by J Doe.
3251 - Commit VC6 and VC7 workspace/project files.
3252 - Commit a tor.spec for making RPM files, with help from jbash.
3253 - Add contrib/torctl.in contributed by Glenn Fink.
3254 - Implement the control-spec's SAVECONF command, to write your
3255 configuration to torrc.
3256 - Get cookie authentication for the controller closer to working.
3257 - Include control-spec.txt in the tarball.
3258 - When set_conf changes our server descriptor, upload a new copy.
3259 But don't upload it too often if there are frequent changes.
3260 - Document authentication config in man page, and document signals
3262 - Clean up confusing parts of man page and torrc.sample.
3263 - Make expand_filename handle ~ and ~username.
3264 - Use autoconf to enable largefile support where necessary. Use
3265 ftello where available, since ftell can fail at 2GB.
3266 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
3267 log more informatively.
3268 - Give a slightly more useful output for "tor -h".
3269 - Refuse application socks connections to port 0.
3270 - Check clock skew for verified servers, but allow unverified
3271 servers and clients to have any clock skew.
3272 - Break DirFetchPostPeriod into:
3273 - DirFetchPeriod for fetching full directory,
3274 - StatusFetchPeriod for fetching running-routers,
3275 - DirPostPeriod for posting server descriptor,
3276 - RendPostPeriod for posting hidden service descriptors.
3277 - Make sure the hidden service descriptors are at a random offset
3278 from each other, to hinder linkability.
3281 Changes in version 0.0.9pre5 - 2004-11-09
3282 o Bugfixes on 0.0.9pre4:
3283 - Fix a seg fault in unit tests (doesn't affect main program).
3284 - Fix an assert bug where a hidden service provider would fail if
3285 the first hop of his rendezvous circuit was down.
3286 - Hidden service operators now correctly handle version 1 style
3287 INTRODUCE1 cells (nobody generates them still, so not a critical
3289 - If do_hup fails, actually notice.
3290 - Handle more errnos from accept() without closing the listener.
3291 Some OpenBSD machines were closing their listeners because
3292 they ran out of file descriptors.
3293 - Send resolve cells to exit routers that are running a new
3294 enough version of the resolve code to work right.
3295 - Better handling of winsock includes on non-MSV win32 compilers.
3296 - Some people had wrapped their tor client/server in a script
3297 that would restart it whenever it died. This did not play well
3298 with our "shut down if your version is obsolete" code. Now people
3299 don't fetch a new directory if their local cached version is
3301 - Make our autogen.sh work on ksh as well as bash.
3304 - Hibernation: New config option "AccountingMaxKB" lets you
3305 set how many KBytes per month you want to allow your server to
3306 consume. Rather than spreading those bytes out evenly over the
3307 month, we instead hibernate for some of the month and pop up
3308 at a deterministic time, work until the bytes are consumed, then
3309 hibernate again. Config option "MonthlyAccountingStart" lets you
3310 specify which day of the month your billing cycle starts on.
3311 - Control interface: a separate program can now talk to your
3312 client/server over a socket, and get/set config options, receive
3313 notifications of circuits and streams starting/finishing/dying,
3314 bandwidth used, etc. The next step is to get some GUIs working.
3315 Let us know if you want to help out. See doc/control-spec.txt .
3316 - Ship a contrib/tor-control.py as an example script to interact
3317 with the control port.
3318 - "tor --hash-password zzyxz" will output a salted password for
3319 use in authenticating to the control interface.
3320 - New log format in config:
3321 "Log minsev[-maxsev] stdout|stderr|syslog" or
3322 "Log minsev[-maxsev] file /var/foo"
3325 - DirPolicy config option, to let people reject incoming addresses
3326 from their dirserver.
3327 - "tor --list-fingerprint" will list your identity key fingerprint
3329 - Add "pass" target for RedirectExit, to make it easier to break
3330 out of a sequence of RedirectExit rules.
3331 - Clients now generate a TLS cert too, in preparation for having
3332 them act more like real nodes.
3333 - Ship src/win32/ in the tarball, so people can use it to build.
3334 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
3336 - New "router-status" line in directory, to better bind each verified
3337 nickname to its identity key.
3338 - Deprecate unofficial config option abbreviations, and abbreviations
3339 not on the command line.
3340 - Add a pure-C tor-resolve implementation.
3341 - Use getrlimit and friends to ensure we can reach MaxConn (currently
3342 1024) file descriptors.
3344 o Code security improvements, inspired by Ilja:
3345 - Replace sprintf with snprintf. (I think they were all safe, but
3347 - Replace strcpy/strncpy with strlcpy in more places.
3348 - Avoid strcat; use snprintf or strlcat instead.
3349 - snprintf wrapper with consistent (though not C99) overflow behavior.
3352 Changes in version 0.0.9pre4 - 2004-10-17
3353 o Bugfixes on 0.0.9pre3:
3354 - If the server doesn't specify an exit policy, use the real default
3355 exit policy, not reject *:*.
3356 - Ignore fascistfirewall when uploading/downloading hidden service
3357 descriptors, since we go through Tor for those; and when using
3358 an HttpProxy, since we assume it can reach them all.
3359 - When looking for an authoritative dirserver, use only the ones
3360 configured at boot. Don't bother looking in the directory.
3361 - The rest of the fix for get_default_conf_file() on older win32.
3362 - Make 'Routerfile' config option obsolete.
3365 - New 'MyFamily nick1,...' config option for a server to
3366 specify other servers that shouldn't be used in the same circuit
3367 with it. Only believed if nick1 also specifies us.
3368 - New 'NodeFamily nick1,nick2,...' config option for a client to
3369 specify nodes that it doesn't want to use in the same circuit.
3370 - New 'Redirectexit pattern address:port' config option for a
3371 server to redirect exit connections, e.g. to a local squid.
3374 Changes in version 0.0.9pre3 - 2004-10-13
3375 o Bugfixes on 0.0.8.1:
3376 - Better torrc example lines for dirbindaddress and orbindaddress.
3377 - Improved bounds checking on parsed ints (e.g. config options and
3378 the ones we find in directories.)
3379 - Better handling of size_t vs int, so we're more robust on 64
3381 - Fix the rest of the bug where a newly started OR would appear
3382 as unverified even after we've added his fingerprint and hupped
3384 - Fix a bug from 0.0.7: when read() failed on a stream, we would
3385 close it without sending back an end. So 'connection refused'
3386 would simply be ignored and the user would get no response.
3388 o Bugfixes on 0.0.9pre2:
3389 - Serving the cached-on-disk directory to people is bad. We now
3390 provide no directory until we've fetched a fresh one.
3391 - Workaround for bug on windows where cached-directories get crlf
3393 - Make get_default_conf_file() work on older windows too.
3394 - If we write a *:* exit policy line in the descriptor, don't write
3395 any more exit policy lines.
3398 - Use only 0.0.9pre1 and later servers for resolve cells.
3399 - Make the dirservers file obsolete.
3400 - Include a dir-signing-key token in directories to tell the
3401 parsing entity which key is being used to sign.
3402 - Remove the built-in bulky default dirservers string.
3403 - New config option "Dirserver %s:%d [fingerprint]", which can be
3404 repeated as many times as needed. If no dirservers specified,
3405 default to moria1,moria2,tor26.
3406 - Make moria2 advertise a dirport of 80, so people behind firewalls
3407 will be able to get a directory.
3408 - Http proxy support
3409 - Dirservers translate requests for http://%s:%d/x to /x
3410 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
3411 be routed through this host.
3412 - Clients ask for /tor/x rather than /x for new enough dirservers.
3413 This way we can one day coexist peacefully with apache.
3414 - Clients specify a "Host: %s%d" http header, to be compatible
3415 with more proxies, and so running squid on an exit node can work.
3418 Changes in version 0.0.8.1 - 2004-10-13
3420 - Fix a seg fault that can be triggered remotely for Tor
3421 clients/servers with an open dirport.
3422 - Fix a rare assert trigger, where routerinfos for entries in
3423 our cpath would expire while we're building the path.
3424 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3425 - Fix a rare seg fault for people running hidden services on
3426 intermittent connections.
3427 - Fix a bug in parsing opt keywords with objects.
3428 - Fix a stale pointer assert bug when a stream detaches and
3430 - Fix a string format vulnerability (probably not exploitable)
3431 in reporting stats locally.
3432 - Fix an assert trigger: sometimes launching circuits can fail
3433 immediately, e.g. because too many circuits have failed recently.
3434 - Fix a compile warning on 64 bit platforms.
3437 Changes in version 0.0.9pre2 - 2004-10-03
3439 - Make fetching a cached directory work for 64-bit platforms too.
3440 - Make zlib.h a required header, not an optional header.
3443 Changes in version 0.0.9pre1 - 2004-10-01
3445 - Stop using separate defaults for no-config-file and
3446 empty-config-file. Now you have to explicitly turn off SocksPort,
3447 if you don't want it open.
3448 - Fix a bug in OutboundBindAddress so it (hopefully) works.
3449 - Improve man page to mention more of the 0.0.8 features.
3450 - Fix a rare seg fault for people running hidden services on
3451 intermittent connections.
3452 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
3454 - Fix more dns related bugs: send back resolve_failed and end cells
3455 more reliably when the resolve fails, rather than closing the
3456 circuit and then trying to send the cell. Also attach dummy resolve
3457 connections to a circuit *before* calling dns_resolve(), to fix
3458 a bug where cached answers would never be sent in RESOLVED cells.
3459 - When we run out of disk space, or other log writing error, don't
3460 crash. Just stop logging to that log and continue.
3461 - We were starting to daemonize before we opened our logs, so if
3462 there were any problems opening logs, we would complain to stderr,
3463 which wouldn't work, and then mysteriously exit.
3464 - Fix a rare bug where sometimes a verified OR would connect to us
3465 before he'd uploaded his descriptor, which would cause us to
3466 assign conn->nickname as though he's unverified. Now we look through
3467 the fingerprint list to see if he's there.
3468 - Fix a rare assert trigger, where routerinfos for entries in
3469 our cpath would expire while we're building the path.
3472 - Clients can ask dirservers for /dir.z to get a compressed version
3473 of the directory. Only works for servers running 0.0.9, of course.
3474 - Make clients cache directories and use them to seed their router
3475 lists at startup. This means clients have a datadir again.
3476 - Configuration infrastructure support for warning on obsolete
3478 - Respond to content-encoding headers by trying to uncompress as
3480 - Reply with a deflated directory when a client asks for "dir.z".
3481 We could use allow-encodings instead, but allow-encodings isn't
3482 specified in HTTP 1.0.
3483 - Raise the max dns workers from 50 to 100.
3484 - Discourage people from setting their dirfetchpostperiod more often
3485 than once per minute.
3486 - Protect dirservers from overzealous descriptor uploading -- wait
3487 10 seconds after directory gets dirty, before regenerating.
3490 Changes in version 0.0.8 - 2004-08-25
3491 o Port it to SunOS 5.9 / Athena
3494 Changes in version 0.0.8rc2 - 2004-08-20
3495 o Make it compile on cygwin again.
3496 o When picking unverified routers, skip those with low uptime and/or
3497 low bandwidth, depending on what properties you care about.
3500 Changes in version 0.0.8rc1 - 2004-08-18
3501 o Changes from 0.0.7.3:
3503 - Fix assert triggers: if the other side returns an address 0.0.0.0,
3504 don't put it into the client dns cache.
3505 - If a begin failed due to exit policy, but we believe the IP address
3506 should have been allowed, switch that router to exitpolicy reject *:*
3507 until we get our next directory.
3509 - Clients choose nodes proportional to advertised bandwidth.
3510 - Avoid using nodes with low uptime as introduction points.
3511 - Handle servers with dynamic IP addresses: don't replace
3512 options->Address with the resolved one at startup, and
3513 detect our address right before we make a routerinfo each time.
3514 - 'FascistFirewall' option to pick dirservers and ORs on specific
3515 ports; plus 'FirewallPorts' config option to tell FascistFirewall
3516 which ports are open. (Defaults to 80,443)
3517 - Be more aggressive about trying to make circuits when the network
3518 has changed (e.g. when you unsuspend your laptop).
3519 - Check for time skew on http headers; report date in response to
3521 - If the entrynode config line has only one node, don't pick it as
3523 - Add strict{entry|exit}nodes config options. If set to 1, then
3524 we refuse to build circuits that don't include the specified entry
3526 - OutboundBindAddress config option, to bind to a specific
3527 IP address for outgoing connect()s.
3528 - End truncated log entries (e.g. directories) with "[truncated]".
3530 o Patches to 0.0.8preX:
3532 - Patches to compile and run on win32 again (maybe)?
3533 - Fix crash when looking for ~/.torrc with no $HOME set.
3534 - Fix a race bug in the unit tests.
3535 - Handle verified/unverified name collisions better when new
3536 routerinfo's arrive in a directory.
3537 - Sometimes routers were getting entered into the stats before
3538 we'd assigned their identity_digest. Oops.
3539 - Only pick and establish intro points after we've gotten a
3542 - AllowUnverifiedNodes config option to let circuits choose no-name
3543 routers in entry,middle,exit,introduction,rendezvous positions.
3544 Allow middle and rendezvous positions by default.
3545 - Add a man page for tor-resolve.
3548 Changes in version 0.0.7.3 - 2004-08-12
3549 o Stop dnsworkers from triggering an assert failure when you
3550 ask them to resolve the host "".
3553 Changes in version 0.0.8pre3 - 2004-08-09
3554 o Changes from 0.0.7.2:
3555 - Allow multiple ORs with same nickname in routerlist -- now when
3556 people give us one identity key for a nickname, then later
3557 another, we don't constantly complain until the first expires.
3558 - Remember used bandwidth (both in and out), and publish 15-minute
3559 snapshots for the past day into our descriptor.
3560 - You can now fetch $DIRURL/running-routers to get just the
3561 running-routers line, not the whole descriptor list. (But
3562 clients don't use this yet.)
3563 - When people mistakenly use Tor as an http proxy, point them
3564 at the tor-doc.html rather than the INSTALL.
3565 - Remove our mostly unused -- and broken -- hex_encode()
3566 function. Use base16_encode() instead. (Thanks to Timo Lindfors
3567 for pointing out this bug.)
3568 - Rotate onion keys every 12 hours, not every 2 hours, so we have
3569 fewer problems with people using the wrong key.
3570 - Change the default exit policy to reject the default edonkey,
3571 kazaa, gnutella ports.
3572 - Add replace_file() to util.[ch] to handle win32's rename().
3574 o Changes from 0.0.8preX:
3575 - Fix two bugs in saving onion keys to disk when rotating, so
3576 hopefully we'll get fewer people using old onion keys.
3577 - Fix an assert error that was making SocksPolicy not work.
3578 - Be willing to expire routers that have an open dirport -- it's
3579 just the authoritative dirservers we want to not forget.
3580 - Reject tor-resolve requests for .onion addresses early, so we
3581 don't build a whole rendezvous circuit and then fail.
3582 - When you're warning a server that he's unverified, don't cry
3584 - Fix a race condition: don't try to extend onto a connection
3585 that's still handshaking.
3586 - For servers in clique mode, require the conn to be open before
3587 you'll choose it for your path.
3588 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
3589 end relay cell, etc.
3590 - Measure bandwidth capacity over the last 24 hours, not just 12
3591 - Bugfix: authoritative dirservers were making and signing a new
3592 directory for each client, rather than reusing the cached one.
3595 Changes in version 0.0.8pre2 - 2004-08-04
3596 o Changes from 0.0.7.2:
3598 - Check directory signature _before_ you decide whether you're
3599 you're running an obsolete version and should exit.
3600 - Check directory signature _before_ you parse the running-routers
3601 list to decide who's running or verified.
3602 - Bugfixes and features:
3603 - Check return value of fclose while writing to disk, so we don't
3604 end up with broken files when servers run out of disk space.
3605 - Log a warning if the user uses an unsafe socks variant, so people
3606 are more likely to learn about privoxy or socat.
3607 - Dirservers now include RFC1123-style dates in the HTTP headers,
3608 which one day we will use to better detect clock skew.
3610 o Changes from 0.0.8pre1:
3611 - Make it compile without warnings again on win32.
3612 - Log a warning if you're running an unverified server, to let you
3613 know you might want to get it verified.
3614 - Only pick a default nickname if you plan to be a server.
3617 Changes in version 0.0.8pre1 - 2004-07-23
3619 - Made our unit tests compile again on OpenBSD 3.5, and tor
3620 itself compile again on OpenBSD on a sparc64.
3621 - We were neglecting milliseconds when logging on win32, so
3622 everything appeared to happen at the beginning of each second.
3625 - 'Extend' relay cell payloads now include the digest of the
3626 intended next hop's identity key. Now we can verify that we're
3627 extending to the right router, and also extend to routers we
3628 hadn't heard of before.
3631 - Tor nodes can now act as relays (with an advertised ORPort)
3632 without being manually verified by the dirserver operators.
3633 - Uploaded descriptors of unverified routers are now accepted
3634 by the dirservers, and included in the directory.
3635 - Verified routers are listed by nickname in the running-routers
3636 list; unverified routers are listed as "$<fingerprint>".
3637 - We now use hash-of-identity-key in most places rather than
3638 nickname or addr:port, for improved security/flexibility.
3639 - To avoid Sybil attacks, paths still use only verified servers.
3640 But now we have a chance to play around with hybrid approaches.
3641 - Nodes track bandwidth usage to estimate capacity (not used yet).
3642 - ClientOnly option for nodes that never want to become servers.
3643 - Directory caching.
3644 - "AuthoritativeDir 1" option for the official dirservers.
3645 - Now other nodes (clients and servers) will cache the latest
3646 directory they've pulled down.
3647 - They can enable their DirPort to serve it to others.
3648 - Clients will pull down a directory from any node with an open
3649 DirPort, and check the signature/timestamp correctly.
3650 - Authoritative dirservers now fetch directories from other
3651 authdirservers, to stay better synced.
3652 - Running-routers list tells who's down also, along with noting
3653 if they're verified (listed by nickname) or unverified (listed
3655 - Allow dirservers to serve running-router list separately.
3656 This isn't used yet.
3657 - ORs connect-on-demand to other ORs
3658 - If you get an extend cell to an OR you're not connected to,
3659 connect, handshake, and forward the create cell.
3660 - The authoritative dirservers stay connected to everybody,
3661 and everybody stays connected to 0.0.7 servers, but otherwise
3662 clients/servers expire unused connections after 5 minutes.
3663 - When servers get a sigint, they delay 30 seconds (refusing new
3664 connections) then exit. A second sigint causes immediate exit.
3665 - File and name management:
3666 - Look for .torrc if no CONFDIR "torrc" is found.
3667 - If no datadir is defined, then choose, make, and secure ~/.tor
3669 - If torrc not found, exitpolicy reject *:*.
3670 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
3671 - If no nickname is defined, derive default from hostname.
3672 - Rename secret key files, e.g. identity.key -> secret_id_key,
3673 to discourage people from mailing their identity key to tor-ops.
3674 - Refuse to build a circuit before the directory has arrived --
3675 it won't work anyway, since you won't know the right onion keys
3677 - Try other dirservers immediately if the one you try is down. This
3678 should tolerate down dirservers better now.
3679 - Parse tor version numbers so we can do an is-newer-than check
3680 rather than an is-in-the-list check.
3681 - New socks command 'resolve', to let us shim gethostbyname()
3683 - A 'tor_resolve' script to access the socks resolve functionality.
3684 - A new socks-extensions.txt doc file to describe our
3685 interpretation and extensions to the socks protocols.
3686 - Add a ContactInfo option, which gets published in descriptor.
3687 - Publish OR uptime in descriptor (and thus in directory) too.
3688 - Write tor version at the top of each log file
3689 - New docs in the tarball:
3691 - Document that you should proxy your SSL traffic too.
3694 Changes in version 0.0.7.2 - 2004-07-07
3695 o A better fix for the 0.0.0.0 problem, that will hopefully
3696 eliminate the remaining related assertion failures.
3699 Changes in version 0.0.7.1 - 2004-07-04
3700 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
3701 since internally we use 0.0.0.0 to signify "not yet resolved".
3704 Changes in version 0.0.7 - 2004-06-07
3705 o Updated the man page to reflect the new features.
3708 Changes in version 0.0.7rc2 - 2004-06-06
3709 o Changes from 0.0.7rc1:
3710 - Make it build on Win32 again.
3711 o Changes from 0.0.6.2:
3712 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
3716 Changes in version 0.0.7rc1 - 2004-06-02
3718 - On sighup, we were adding another log without removing the first
3719 one. So log messages would get duplicated n times for n sighups.
3720 - Several cases of using a connection after we'd freed it. The
3721 problem was that connections that are pending resolve are in both
3722 the pending_resolve tree, and also the circuit's resolving_streams
3723 list. When you want to remove one, you must remove it from both.
3724 - Fix a double-mark-for-close where an end cell arrived for a
3725 resolving stream, and then the resolve failed.
3726 - Check directory signatures based on name of signer, not on whom
3727 we got the directory from. This will let us cache directories more
3730 - Crank up some of our constants to handle more users.
3733 Changes in version 0.0.7pre1 - 2004-06-02
3734 o Fixes for crashes and other obnoxious bugs:
3735 - Fix an epipe bug: sometimes when directory connections failed
3736 to connect, we would give them a chance to flush before closing
3738 - When we detached from a circuit because of resolvefailed, we
3739 would immediately try the same circuit twice more, and then
3740 give up on the resolve thinking we'd tried three different
3742 - Limit the number of intro circuits we'll attempt to build for a
3743 hidden service per 15-minute period.
3744 - Check recommended-software string *early*, before actually parsing
3745 the directory. Thus we can detect an obsolete version and exit,
3746 even if the new directory format doesn't parse.
3747 o Fixes for security bugs:
3748 - Remember which nodes are dirservers when you startup, and if a
3749 random OR enables his dirport, don't automatically assume he's
3750 a trusted dirserver.
3752 - Directory connections were asking the wrong poll socket to
3753 start writing, and not asking themselves to start writing.
3754 - When we detached from a circuit because we sent a begin but
3755 didn't get a connected, we would use it again the first time;
3756 but after that we would correctly switch to a different one.
3757 - Stop warning when the first onion decrypt attempt fails; they
3758 will sometimes legitimately fail now that we rotate keys.
3759 - Override unaligned-access-ok check when $host_cpu is ia64 or
3760 arm. Apparently they allow it but the kernel whines.
3761 - Dirservers try to reconnect periodically too, in case connections
3763 - Fix some memory leaks in directory servers.
3764 - Allow backslash in Win32 filenames.
3765 - Made Tor build complain-free on FreeBSD, hopefully without
3766 breaking other BSD builds. We'll see.
3768 - Doxygen markup on all functions and global variables.
3769 - Make directory functions update routerlist, not replace it. So
3770 now directory disagreements are not so critical a problem.
3771 - Remove the upper limit on number of descriptors in a dirserver's
3772 directory (not that we were anywhere close).
3773 - Allow multiple logfiles at different severity ranges.
3774 - Allow *BindAddress to specify ":port" rather than setting *Port
3775 separately. Allow multiple instances of each BindAddress config
3776 option, so you can bind to multiple interfaces if you want.
3777 - Allow multiple exit policy lines, which are processed in order.
3778 Now we don't need that huge line with all the commas in it.
3779 - Enable accept/reject policies on SOCKS connections, so you can bind
3780 to 0.0.0.0 but still control who can use your OP.
3783 Changes in version 0.0.6.2 - 2004-05-16
3784 o Our integrity-checking digest was checking only the most recent cell,
3785 not the previous cells like we'd thought.
3786 Thanks to Stefan Mark for finding the flaw!
3789 Changes in version 0.0.6.1 - 2004-05-06
3790 o Fix two bugs in our AES counter-mode implementation (this affected
3791 onion-level stream encryption, but not TLS-level). It turns
3792 out we were doing something much more akin to a 16-character
3793 polyalphabetic cipher. Oops.
3794 Thanks to Stefan Mark for finding the flaw!
3795 o Retire moria3 as a directory server, and add tor26 as a directory
3799 Changes in version 0.0.6 - 2004-05-02
3803 Changes in version 0.0.6rc4 - 2004-05-01
3804 o Update the built-in dirservers list to use the new directory format
3805 o Fix a rare seg fault: if a node offering a hidden service attempts
3806 to build a circuit to Alice's rendezvous point and fails before it
3807 reaches the last hop, it retries with a different circuit, but
3809 o Handle windows socket errors correctly.
3812 Changes in version 0.0.6rc3 - 2004-04-28
3813 o Don't expire non-general excess circuits (if we had enough
3814 circuits open, we were expiring rendezvous circuits -- even
3815 when they had a stream attached. oops.)
3816 o Fetch randomness from /dev/urandom better (not via fopen/fread)
3817 o Better debugging for tls errors
3818 o Some versions of openssl have an SSL_pending function that erroneously
3819 returns bytes when there is a non-application record pending.
3820 o Set Content-Type on the directory and hidserv descriptor.
3821 o Remove IVs from cipher code, since AES-ctr has none.
3822 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
3823 o We were using an array of length zero in a few places.
3824 o win32's gethostbyname can't resolve an IP to an IP.
3825 o win32's close can't close a socket.
3828 Changes in version 0.0.6rc2 - 2004-04-26
3829 o Fix a bug where we were closing tls connections intermittently.
3830 It turns out openssl keeps its errors around -- so if an error
3831 happens, and you don't ask about it, and then another openssl
3832 operation happens and succeeds, and you ask if there was an error,
3833 it tells you about the first error. Fun fun.
3834 o Fix a bug that's been lurking since 27 may 03 (!)
3835 When passing back a destroy cell, we would use the wrong circ id.
3836 'Mostly harmless', but still worth fixing.
3837 o Since we don't support truncateds much, don't bother sending them;
3838 just close the circ.
3839 o check for <machine/limits.h> so we build on NetBSD again (I hope).
3840 o don't crash if a conn that sent a begin has suddenly lost its circuit
3841 (this was quite rare).
3844 Changes in version 0.0.6rc1 - 2004-04-25
3845 o We now rotate link (tls context) keys and onion keys.
3846 o CREATE cells now include oaep padding, so you can tell
3847 if you decrypted them correctly.
3848 o Add bandwidthburst to server descriptor.
3849 o Directories now say which dirserver signed them.
3850 o Use a tor_assert macro that logs failed assertions too.
3853 Changes in version 0.0.6pre5 - 2004-04-18
3854 o changes from 0.0.6pre4:
3855 - make tor build on broken freebsd 5.2 installs
3856 - fix a failed assert when you try an intro point, get a nack, and try
3857 a second one and it works.
3858 - when alice uses a port that the hidden service doesn't accept,
3859 it now sends back an end cell (denied by exit policy). otherwise
3860 alice would just have to wait to time out.
3861 - fix another rare bug: when we had tried all the intro
3862 points for a hidden service, we fetched the descriptor
3863 again, but we left our introcirc thinking it had already
3864 sent an intro, so it kept waiting for a response...
3865 - bugfix: when you sleep your hidden-service laptop, as soon
3866 as it wakes up it tries to upload a service descriptor, but
3867 socketpair fails for some reason (localhost not up yet?).
3868 now we simply give up on that upload, and we'll try again later.
3869 i'd still like to find the bug though.
3870 - if an intro circ waiting for an ack dies before getting one, then
3872 - we were reusing stale service descriptors and refetching usable
3876 Changes in version 0.0.6pre4 - 2004-04-14
3877 o changes from 0.0.6pre3:
3878 - when bob fails to connect to the rendezvous point, and his
3879 circ didn't fail because of the rendezvous point itself, then
3880 he retries a couple of times
3881 - we expire introduction and rendezvous circs more thoroughly
3882 (sometimes they were hanging around forever)
3883 - we expire unattached rendezvous streams that have been around
3884 too long (they were sticking around forever).
3885 - fix a measly fencepost error that was crashing everybody with
3889 Changes in version 0.0.6pre3 - 2004-04-14
3890 o changes from 0.0.6pre2:
3891 - make hup work again
3892 - fix some memory leaks for dirservers
3893 - allow more skew in rendezvous descriptor timestamps, to help
3894 handle people like blanu who don't know what time it is
3895 - normal circs are 3 hops, but some rend/intro circs are 4, if
3896 the initiator doesn't get to choose the last hop
3897 - send acks for introductions, so alice can know whether to try
3899 - bob publishes intro points more correctly
3900 o changes from 0.0.5:
3901 - fix an assert trigger that's been plaguing us since the days
3902 of 0.0.2prexx (thanks weasel!)
3903 - retry stream correctly when we fail to connect because of
3904 exit-policy-reject (should try another) or can't-resolve-address
3905 (also should try another, because dns on random internet servers
3907 - when we hup a dirserver and we've *removed* a server from the
3908 approved-routers list, now we remove that server from the
3909 in-memory directories too
3912 Changes in version 0.0.6pre2 - 2004-04-08
3913 o We fixed our base32 implementation. Now it works on all architectures.
3916 Changes in version 0.0.6pre1 - 2004-04-08
3918 - Hidden services and rendezvous points are implemented. Go to
3919 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
3920 hidden services. (This only works via a socks4a proxy such as
3921 Privoxy, and currently it's quite slow.)
3924 Changes in version 0.0.5 - 2004-03-30
3928 Changes in version 0.0.5rc3 - 2004-03-29
3929 o Install torrc as torrc.sample -- we no longer clobber your
3931 o Re-enable recommendedversion checking (we broke it in rc2, oops)
3932 o Add in a 'notice' log level for things the operator should hear
3933 but that aren't warnings
3936 Changes in version 0.0.5rc2 - 2004-03-29
3937 o Hold socks connection open until reply is flushed (if possible)
3938 o Make exit nodes resolve IPs to IPs immediately, rather than asking
3939 the dns farm to do it.
3940 o Fix c99 aliasing warnings in rephist.c
3941 o Don't include server descriptors that are older than 24 hours in the
3943 o Give socks 'reject' replies their whole 15s to attempt to flush,
3944 rather than seeing the 60s timeout and assuming the flush had failed.
3945 o Clean automake droppings from the cvs repository
3948 Changes in version 0.0.5rc1 - 2004-03-28
3949 o Fix mangled-state bug in directory fetching (was causing sigpipes).
3950 o Only build circuits after we've fetched the directory: clients were
3951 using only the directory servers before they'd fetched a directory.
3952 This also means longer startup time; so it goes.
3953 o Fix an assert trigger where an OP would fail to handshake, and we'd
3954 expect it to have a nickname.
3955 o Work around a tsocks bug: do a socks reject when AP connection dies
3956 early, else tsocks goes into an infinite loop.
3959 Changes in version 0.0.4 - 2004-03-26
3960 o When connecting to a dirserver or OR and the network is down,
3964 Changes in version 0.0.3 - 2004-03-26
3965 o Warn and fail if server chose a nickname with illegal characters
3966 o Port to Solaris and Sparc:
3967 - include missing header fcntl.h
3968 - have autoconf find -lsocket -lnsl automatically
3969 - deal with hardware word alignment
3970 - make uname() work (solaris has a different return convention)
3971 - switch from using signal() to sigaction()
3972 o Preliminary work on reputation system:
3973 - Keep statistics on success/fail of connect attempts; they're published
3974 by kill -USR1 currently.
3975 - Add a RunTesting option to try to learn link state by creating test
3976 circuits, even when SocksPort is off.
3977 - Remove unused open circuits when there are too many.
3980 Changes in version 0.0.2 - 2004-03-19
3981 - Include strlcpy and strlcat for safer string ops
3982 - define INADDR_NONE so we compile (but still not run) on solaris
3985 Changes in version 0.0.2pre27 - 2004-03-14
3987 - Allow internal tor networks (we were rejecting internal IPs,
3988 now we allow them if they're set explicitly).
3989 - And fix a few endian issues.
3992 Changes in version 0.0.2pre26 - 2004-03-14
3994 - If a stream times out after 15s without a connected cell, don't
3995 try that circuit again: try a new one.
3996 - Retry streams at most 4 times. Then give up.
3997 - When a dirserver gets a descriptor from an unknown router, it
3998 logs its fingerprint (so the dirserver operator can choose to
3999 accept it even without mail from the server operator).
4000 - Inform unapproved servers when we reject their descriptors.
4001 - Make tor build on Windows again. It works as a client, who knows
4003 - Clearer instructions in the torrc for how to set up a server.
4004 - Be more efficient about reading fd's when our global token bucket
4005 (used for rate limiting) becomes empty.
4007 - Stop asserting that computers always go forward in time. It's
4009 - When we sent a cell (e.g. destroy) and then marked an OR connection
4010 expired, we might close it before finishing a flush if the other
4011 side isn't reading right then.
4012 - Don't allow dirservers to start if they haven't defined
4014 - We were caching transient dns failures. Oops.
4015 - Prevent servers from publishing an internal IP as their address.
4016 - Address a strcat vulnerability in circuit.c
4019 Changes in version 0.0.2pre25 - 2004-03-04
4021 - Put the OR's IP in its router descriptor, not its fqdn. That way
4022 we'll stop being stalled by gethostbyname for nodes with flaky dns,
4025 - If the user typed in an address that didn't resolve, the server
4029 Changes in version 0.0.2pre24 - 2004-03-03
4031 - Fix an assertion failure in dns.c, where we were trying to dequeue
4032 a pending dns resolve even if it wasn't pending
4033 - Fix a spurious socks5 warning about still trying to write after the
4034 connection is finished.
4035 - Hold certain marked_for_close connections open until they're finished
4036 flushing, rather than losing bytes by closing them too early.
4037 - Correctly report the reason for ending a stream
4038 - Remove some duplicate calls to connection_mark_for_close
4039 - Put switch_id and start_daemon earlier in the boot sequence, so it
4040 will actually try to chdir() to options.DataDirectory
4041 - Make 'make test' exit(1) if a test fails; fix some unit tests
4042 - Make tor fail when you use a config option it doesn't know about,
4043 rather than warn and continue.
4044 - Make --version work
4045 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
4048 Changes in version 0.0.2pre23 - 2004-02-29
4050 - Print a statement when the first circ is finished, so the user
4052 - If a relay cell is unrecognized at the end of the circuit,
4053 send back a destroy. (So attacks to mutate cells are more
4055 - New config option 'excludenodes' to avoid certain nodes for circuits.
4056 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
4057 so you can collect coredumps there.
4059 - Fix a bug in tls flushing where sometimes data got wedged and
4060 didn't flush until more data got sent. Hopefully this bug was
4061 a big factor in the random delays we were seeing.
4062 - Make 'connected' cells include the resolved IP, so the client
4063 dns cache actually gets populated.
4064 - Disallow changing from ORPort=0 to ORPort>0 on hup.
4065 - When we time-out on a stream and detach from the circuit, send an
4066 end cell down it first.
4067 - Only warn about an unknown router (in exitnodes, entrynodes,
4068 excludenodes) after we've fetched a directory.
4071 Changes in version 0.0.2pre22 - 2004-02-26
4073 - Servers publish less revealing uname information in descriptors.
4074 - More memory tracking and assertions, to crash more usefully when
4076 - If the default torrc isn't there, just use some default defaults.
4077 Plus provide an internal dirservers file if they don't have one.
4078 - When the user tries to use Tor as an http proxy, give them an http
4079 501 failure explaining that we're a socks proxy.
4080 - Dump a new router.desc on hup, to help confused people who change
4081 their exit policies and then wonder why router.desc doesn't reflect
4083 - Clean up the generic tor.sh init script that we ship with.
4085 - If the exit stream is pending on the resolve, and a destroy arrives,
4086 then the stream wasn't getting removed from the pending list. I
4087 think this was the one causing recent server crashes.
4088 - Use a more robust poll on OSX 10.3, since their poll is flaky.
4089 - When it couldn't resolve any dirservers, it was useless from then on.
4090 Now it reloads the RouterFile (or default dirservers) if it has no
4092 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
4093 many users don't even *have* a /usr/local/sbin/.
4096 Changes in version 0.0.2pre21 - 2004-02-18
4098 - There's a ChangeLog file that actually reflects the changelog.
4099 - There's a 'torify' wrapper script, with an accompanying
4100 tor-tsocks.conf, that simplifies the process of using tsocks for
4101 tor. It even has a man page.
4102 - The tor binary gets installed to sbin rather than bin now.
4103 - Retry streams where the connected cell hasn't arrived in 15 seconds
4104 - Clean up exit policy handling -- get the default out of the torrc,
4105 so we can update it without forcing each server operator to fix
4107 - Allow imaps and pop3s in default exit policy
4109 - Prevent picking middleman nodes as the last node in the circuit
4112 Changes in version 0.0.2pre20 - 2004-01-30
4114 - We now have a deb package, and it's in debian unstable. Go to
4116 - I've split the TotalBandwidth option into BandwidthRate (how many
4117 bytes per second you want to allow, long-term) and
4118 BandwidthBurst (how many bytes you will allow at once before the cap
4119 kicks in). This better token bucket approach lets you, say, set
4120 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
4121 performance while not exceeding your monthly bandwidth quota.
4122 - Push out a tls record's worth of data once you've got it, rather
4123 than waiting until you've read everything waiting to be read. This
4124 may improve performance by pipelining better. We'll see.
4125 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
4126 from failed circuits (if they haven't been connected yet) and attach
4128 - Expire old streams that haven't managed to connect. Some day we'll
4129 have them reattach to new circuits instead.
4132 - Fix several memory leaks that were causing servers to become bloated
4134 - Fix a few very rare assert triggers. A few more remain.
4135 - Setuid to User _before_ complaining about running as root.
4138 Changes in version 0.0.2pre19 - 2004-01-07
4140 - Fix deadlock condition in dns farm. We were telling a child to die by
4141 closing the parent's file descriptor to him. But newer children were
4142 inheriting the open file descriptor from the parent, and since they
4143 weren't closing it, the socket never closed, so the child never read
4144 eof, so he never knew to exit. Similarly, dns workers were holding
4145 open other sockets, leading to all sorts of chaos.
4146 - New cleaner daemon() code for forking and backgrounding.
4147 - If you log to a file, it now prints an entry at the top of the
4148 logfile so you know it's working.
4149 - The onionskin challenge length was 30 bytes longer than necessary.
4150 - Started to patch up the spec so it's not quite so out of date.
4153 Changes in version 0.0.2pre18 - 2004-01-02
4155 - Fix endian issues with the 'integrity' field in the relay header.
4156 - Fix a potential bug where connections in state
4157 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
4160 Changes in version 0.0.2pre17 - 2003-12-30
4162 - Made --debuglogfile (or any second log file, actually) work.
4163 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
4164 adversary could force us into an infinite loop.
4167 - Each onionskin handshake now includes a hash of the computed key,
4168 to prove the server's identity and help perfect forward secrecy.
4169 - Changed cell size from 256 to 512 bytes (working toward compatibility
4171 - Changed cell length to 2 bytes, and moved it to the relay header.
4172 - Implemented end-to-end integrity checking for the payloads of
4174 - Separated streamid from 'recognized' (otherwise circuits will get
4175 messed up when we try to have streams exit from the middle). We
4176 use the integrity-checking to confirm that a cell is addressed to
4178 - Randomize the initial circid and streamid values, so an adversary who
4179 breaks into a node can't learn how many circuits or streams have
4183 Changes in version 0.0.2pre16 - 2003-12-14
4185 - Fixed a bug that made HUP trigger an assert
4186 - Fixed a bug where a circuit that immediately failed wasn't being
4187 counted as a failed circuit in counting retries.
4190 - Now we close the circuit when we get a truncated cell: otherwise we're
4191 open to an anonymity attack where a bad node in the path truncates
4192 the circuit and then we open streams at him.
4193 - Add port ranges to exit policies
4194 - Add a conservative default exit policy
4195 - Warn if you're running tor as root
4196 - on HUP, retry OR connections and close/rebind listeners
4197 - options.EntryNodes: try these nodes first when picking the first node
4198 - options.ExitNodes: if your best choices happen to include any of
4199 your preferred exit nodes, you choose among just those preferred
4201 - options.ExcludedNodes: nodes that are never picked in path building
4204 Changes in version 0.0.2pre15 - 2003-12-03
4205 o Robustness and bugfixes:
4206 - Sometimes clients would cache incorrect DNS resolves, which would
4207 really screw things up.
4208 - An OP that goes offline would slowly leak all its sockets and stop
4210 - A wide variety of bugfixes in exit node selection, exit policy
4211 handling, and processing pending streams when a new circuit is
4213 - Pick nodes for a path only from those the directory says are up
4214 - Choose randomly from all running dirservers, not always the first one
4215 - Increase allowed http header size for directory fetch.
4216 - Stop writing to stderr (if we're daemonized it will be closed).
4217 - Enable -g always, so cores will be more useful to me.
4218 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
4221 - Wrote a man page. It lists commonly used options.
4224 - Change default loglevel to warn.
4225 - Make PidFile default to null rather than littering in your CWD.
4226 - OnionRouter config option is now obsolete. Instead it just checks
4228 - Moved to a single unified torrc file for both clients and servers.
4231 Changes in version 0.0.2pre14 - 2003-11-29
4232 o Robustness and bugfixes:
4233 - Force the admin to make the DataDirectory himself
4234 - to get ownership/permissions right
4235 - so clients no longer make a DataDirectory and then never use it
4236 - fix bug where a client who was offline for 45 minutes would never
4237 pull down a directory again
4238 - fix (or at least hide really well) the dns assert bug that was
4239 causing server crashes
4240 - warnings and improved robustness wrt clockskew for certs
4241 - use the native daemon(3) to daemonize, when available
4242 - exit if bind() fails
4243 - exit if neither socksport nor orport is defined
4244 - include our own tor_timegm (Win32 doesn't have its own)
4245 - bugfix for win32 with lots of connections
4246 - fix minor bias in PRNG
4247 - make dirserver more robust to corrupt cached directory
4250 - Wrote the design document (woo)
4252 o Circuit building and exit policies:
4253 - Circuits no longer try to use nodes that the directory has told them
4255 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
4256 bitcounts (18.0.0.0/8).
4257 - Make AP connections standby for a circuit if no suitable circuit
4258 exists, rather than failing
4259 - Circuits choose exit node based on addr/port, exit policies, and
4260 which AP connections are standing by
4261 - Bump min pathlen from 2 to 3
4262 - Relay end cells have a payload to describe why the stream ended.
4263 - If the stream failed because of exit policy, try again with a new
4265 - Clients have a dns cache to remember resolved addresses.
4266 - Notice more quickly when we have no working circuits
4269 - APPort is now called SocksPort
4270 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
4272 - RecommendedVersions is now a config variable rather than
4273 hardcoded (for dirservers)
4274 - Reloads config on HUP
4275 - Usage info on -h or --help
4276 - If you set User and Group config vars, it'll setu/gid to them.
4278 Changes in version 0.0.2pre13 - 2003-10-19
4279 o General stability:
4280 - SSL_write no longer fails when it returns WANTWRITE and the number
4281 of bytes in the buf has changed by the next SSL_write call.
4282 - Fix segfault fetching directory when network is down
4283 - Fix a variety of minor memory leaks
4284 - Dirservers reload the fingerprints file on HUP, so I don't have
4285 to take down the network when I approve a new router
4286 - Default server config file has explicit Address line to specify fqdn
4289 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
4290 - Make listener connections not ever alloc bufs
4292 o Autoconf improvements:
4293 - don't clobber an external CFLAGS in ./configure
4294 - Make install now works
4295 - create var/lib/tor on make install
4296 - autocreate a tor.sh initscript to help distribs
4297 - autocreate the torrc and sample-server-torrc with correct paths
4299 o Log files and Daemonizing now work:
4300 - If --DebugLogFile is specified, log to it at -l debug
4301 - If --LogFile is specified, use it instead of commandline
4302 - If --RunAsDaemon is set, tor forks and backgrounds on startup