1 Changes in version 0.1.2.5-xxxx - 200?-??-??
3 - Enable "BEGIN_DIR" cells: prefer to connect to the directory
4 server via TLS so we do encrypted directory requests rather than
5 plaintext. On by default; disable via the TunnelDirConns config
7 - Enable write limiting as well as read limiting. Now we sacrifice
8 capacity if we're pushing out lots of directory traffic, rather
9 than overrunning the user's intended bandwidth limits.
12 - Start using the state file to store bandwidth accounting data:
13 the bw_accounting file is now obsolete. We'll keep generating it
14 for a while for people who are still using 0.1.2.4-alpha.
15 - Try to batch changes to the state file so that we do as few
16 disk writes as possible while still storing important things in
18 - Ongoing work on eventdns infrastructure: add dns server and ipv6
20 - Make PIDFile work on Windows (untested).
21 - Add internal descriptions for a bunch of configuration options:
22 accessible via controller interface and in comments in saved
26 - Stop sending the HttpProxyAuthenticator string to directory
27 servers when directory connections are tunnelled through Tor.
28 - Clients no longer store bandwidth history in the state file.
29 - Do not log introduction points for hidden services if SafeLogging
31 - When generating bandwidth history, round down to the nearest
32 1k. When storing accounting data, round up to the nearest 1k.
33 - When we're running as a server, remember when we last rotated onion
34 keys, so that we will rotate keys once they're a week old even if
35 we never stay up for a week ourselves.
38 - Fix a longstanding bug in eventdns that prevented the count of
39 timed-out resolves from ever being reset. This bug caused us to
40 give up on a nameserver the third time it timed out, and try it
41 10 seconds later... and to give up on it every time it timed out
42 after that. (May fix bug 326.)
45 - Fix a bug when a PF socket is first used. (Patch from Fabian
47 - Fix an assert failure when a directory authority sets
48 AuthDirRejectUnlisted and then receives a descriptor from an
49 unlisted router (reported by seeess).
50 - Fix a bug on the Windows implementation of tor_mmap_file that
51 would prevent the cached-routers file from ever loading. (reported by
53 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
54 to resolve an address at a given exit node even when they ask for
56 - Routers no longer ever list themselves in their "family" line,
57 even if configured to do so. This makes it easier to configure
58 family lists efficiently.
60 o Controller features:
61 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
62 - Reimplement GETINFO so that info/names stays in sync with the
65 o Controller bugfixes:
66 - Report the circuit number correctly in STREAM CLOSED events. (Bug
67 reported by Mike Perry.)
68 - Do not report bizarre values for results of accounting GETINFOs
69 when the last second's write or read exceeds the alloted bandwidth.
72 Changes in version 0.1.2.4-alpha - 2006-12-03
74 - Add support for using natd; this allows FreeBSDs earlier than
75 5.1.2 to have ipfw send connections through Tor without using
76 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
79 - Make all connections to addresses of the form ".noconnect"
80 immediately get closed. This lets application/controller combos
81 successfully test whether they're talking to the same Tor by
82 watching for STREAM events.
83 - Make cross.sh cross-compilation script work even when autogen.sh
84 hasn't been run. (Patch from Michael Mohr.)
85 - Statistics dumped by -USR2 now include a breakdown of public key
86 operations, for profiling.
89 - Fix a major leak when directory authorities parse their
90 approved-routers list, a minor memory leak when we fail to pick
91 an exit node, and a few rare leaks on errors.
92 - Handle TransPort connections even when the server sends data before
93 the client sends data. Previously, the connection would just hang
94 until the client sent data. (Patch from tup based on patch from
96 - Avoid assert failure when our cached-routers file is empty on
100 - Don't log spurious warnings when we see a circuit close reason we
101 don't recognize; it's probably just from a newer version of Tor.
102 - Have directory authorities allow larger amounts of drift in uptime
103 without replacing the server descriptor: previously, a server that
104 restarted every 30 minutes could have 48 "interesting" descriptors
106 - Start linking to the Tor specification and Tor reference manual
107 correctly in the Windows installer.
108 - Add Vidalia to the OS X uninstaller script, so when we uninstall
109 Tor/Privoxy we also uninstall Vidalia.
110 - Resume building on Irix64, and fix a lot of warnings from its
112 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
113 when we're running as a client.
116 Changes in version 0.1.2.3-alpha - 2006-10-29
118 - Prepare for servers to publish descriptors less often: never
119 discard a descriptor simply for being too old until either it is
120 recommended by no authorities, or until we get a better one for
121 the same router. Make caches consider retaining old recommended
122 routers for even longer.
123 - If most authorities set a BadExit flag for a server, clients
124 don't think of it as a general-purpose exit. Clients only consider
125 authorities that advertise themselves as listing bad exits.
126 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
127 headers for content, so that we can work better in the presence of
128 caching HTTP proxies.
129 - Allow authorities to list nodes as bad exits by fingerprint or by
132 o Minor features, controller:
133 - Add a REASON field to CIRC events; for backward compatibility, this
134 field is sent only to controllers that have enabled the extended
135 event format. Also, add additional reason codes to explain why
136 a given circuit has been destroyed or truncated. (Patches from
138 - Add a REMOTE_REASON field to extended CIRC events to tell the
139 controller about why a remote OR told us to close a circuit.
140 - Stream events also now have REASON and REMOTE_REASON fields,
141 working much like those for circuit events.
142 - There's now a GETINFO ns/... field so that controllers can ask Tor
143 about the current status of a router.
144 - A new event type "NS" to inform a controller when our opinion of
145 a router's status has changed.
146 - Add a GETINFO events/names and GETINFO features/names so controllers
147 can tell which events and features are supported.
148 - A new CLEARDNSCACHE signal to allow controllers to clear the
149 client-side DNS cache without expiring circuits.
152 - When the user sends a NEWNYM signal, clear the client-side DNS
153 cache too. Otherwise we continue to act on previous information.
156 - Avoid sending junk to controllers or segfaulting when a controller
157 uses EVENT_NEW_DESC with verbose nicknames.
158 - Stop triggering asserts if the controller tries to extend hidden
159 service circuits (reported by mwenge).
160 - Avoid infinite loop on unexpected controller input.
161 - When the controller does a "GETINFO network-status", tell it
162 about even those routers whose descriptors are very old, and use
163 long nicknames where appropriate.
164 - Change NT service functions to be loaded on demand. This lets us
165 build with MinGW without breaking Tor for Windows 98 users.
166 - Do DirPort reachability tests less often, since a single test
167 chews through many circuits before giving up.
168 - In the hidden service example in torrc.sample, stop recommending
169 esoteric and discouraged hidden service options.
170 - When stopping an NT service, wait up to 10 sec for it to actually
171 stop. (Patch from Matt Edman; resolves bug 295.)
172 - Fix handling of verbose nicknames with ORCONN controller events:
173 make them show up exactly when requested, rather than exactly when
175 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
176 printing a duplicate "$" in the keys we send (reported by mwenge).
177 - Correctly set maximum connection limit on Cygwin. (This time
179 - Try to detect Windows correctly when cross-compiling.
180 - Detect the size of the routers file correctly even if it is
181 corrupted (on systems without mmap) or not page-aligned (on systems
182 with mmap). This bug was harmless.
183 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
184 to open a stream fails; now we do in more cases. This should
185 make clients able to find a good exit faster in some cases, since
186 unhandleable requests will now get an error rather than timing out.
187 - Resolve two memory leaks when rebuilding the on-disk router cache
188 (reported by fookoowa).
189 - Clean up minor code warnings suggested by the MIPSpro C compiler,
190 and reported by some Centos users.
191 - Controller signals now work on non-Unix platforms that don't define
192 SIGUSR1 and SIGUSR2 the way we expect.
193 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
194 values before failing, and always enables eventdns.
195 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
196 Try to fix this in configure.in by checking for most functions
197 before we check for libevent.
200 Changes in version 0.1.2.2-alpha - 2006-10-07
202 - Make our async eventdns library on-by-default for Tor servers,
203 and plan to deprecate the separate dnsworker threads.
204 - Add server-side support for "reverse" DNS lookups (using PTR
205 records so clients can determine the canonical hostname for a given
206 IPv4 address). Only supported by servers using eventdns; servers
207 now announce in their descriptors whether they support eventdns.
208 - Specify and implement client-side SOCKS5 interface for reverse DNS
209 lookups (see doc/socks-extensions.txt).
210 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
211 connect to directory servers through Tor. Previously, clients needed
212 to find Tor exits to make private connections to directory servers.
213 - Avoid choosing Exit nodes for entry or middle hops when the
214 total bandwidth available from non-Exit nodes is much higher than
215 the total bandwidth available from Exit nodes.
216 - Workaround for name servers (like Earthlink's) that hijack failing
217 DNS requests and replace the no-such-server answer with a "helpful"
218 redirect to an advertising-driven search portal. Also work around
219 DNS hijackers who "helpfully" decline to hijack known-invalid
220 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
221 lets you turn it off.
222 - Send out a burst of long-range padding cells once we've established
223 that we're reachable. Spread them over 4 circuits, so hopefully
224 a few will be fast. This exercises our bandwidth and bootstraps
225 us into the directory more quickly.
227 o New/improved config options:
228 - Add new config option "ResolvConf" to let the server operator
229 choose an alternate resolve.conf file when using eventdns.
230 - Add an "EnforceDistinctSubnets" option to control our "exclude
231 servers on the same /16" behavior. It's still on by default; this
232 is mostly for people who want to operate private test networks with
233 all the machines on the same subnet.
234 - If one of our entry guards is on the ExcludeNodes list, or the
235 directory authorities don't think it's a good guard, treat it as
236 if it were unlisted: stop using it as a guard, and throw it off
237 the guards list if it stays that way for a long time.
238 - Allow directory authorities to be marked separately as authorities
239 for the v1 directory protocol, the v2 directory protocol, and
240 as hidden service directories, to make it easier to retire old
241 authorities. V1 authorities should set "HSAuthoritativeDir 1"
242 to continue being hidden service authorities too.
243 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
245 o Minor features, controller:
246 - Fix CIRC controller events so that controllers can learn the
247 identity digests of non-Named servers used in circuit paths.
248 - Let controllers ask for more useful identifiers for servers. Instead
249 of learning identity digests for un-Named servers and nicknames
250 for Named servers, the new identifiers include digest, nickname,
251 and indication of Named status. Off by default; see control-spec.txt
252 for more information.
253 - Add a "getinfo address" controller command so it can display Tor's
254 best guess to the user.
255 - New controller event to alert the controller when our server
256 descriptor has changed.
257 - Give more meaningful errors on controller authentication failure.
259 o Minor features, other:
260 - When asked to resolve a hostname, don't use non-exit servers unless
261 requested to do so. This allows servers with broken DNS to be
262 useful to the network.
263 - Divide eventdns log messages into warn and info messages.
264 - Reserve the nickname "Unnamed" for routers that can't pick
265 a hostname: any router can call itself Unnamed; directory
266 authorities will never allocate Unnamed to any particular router;
267 clients won't believe that any router is the canonical Unnamed.
268 - Only include function names in log messages for info/debug messages.
269 For notice/warn/err, the content of the message should be clear on
270 its own, and printing the function name only confuses users.
271 - Avoid some false positives during reachability testing: don't try
272 to test via a server that's on the same /24 as us.
273 - If we fail to build a circuit to an intended enclave, and it's
274 not mandatory that we use that enclave, stop wanting it.
275 - When eventdns is enabled, allow multithreaded builds on NetBSD and
276 OpenBSD. (We had previously disabled threads on these platforms
277 because they didn't have working thread-safe resolver functions.)
279 o Major bugfixes, anonymity/security:
280 - If a client asked for a server by name, and there's a named server
281 in our network-status but we don't have its descriptor yet, we
282 could return an unnamed server instead.
283 - Fix NetBSD bug that could allow someone to force uninitialized RAM
284 to be sent to a server's DNS resolver. This only affects NetBSD
285 and other platforms that do not bounds-check tolower().
286 - Reject (most) attempts to use Tor circuits with length one. (If
287 many people start using Tor as a one-hop proxy, exit nodes become
288 a more attractive target for compromise.)
289 - Just because your DirPort is open doesn't mean people should be
290 able to remotely teach you about hidden service descriptors. Now
291 only accept rendezvous posts if you've got HSAuthoritativeDir set.
293 o Major bugfixes, other:
294 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
295 - When a client asks the server to resolve (not connect to)
296 an address, and it has a cached answer, give them the cached answer.
297 Previously, the server would give them no answer at all.
298 - Allow really slow clients to not hang up five minutes into their
299 directory downloads (suggested by Adam J. Richter).
300 - We were building exactly the wrong circuits when we anticipated
301 hidden service requirements, meaning Tor would have to build all
302 its circuits on demand.
303 - Avoid crashing when we mmap a router cache file of size 0.
304 - When testing reachability of our DirPort, don't launch new
305 tests when there's already one in progress -- unreachable
306 servers were stacking up dozens of testing streams.
308 o Minor bugfixes, correctness:
309 - If we're a directory mirror and we ask for "all" network status
310 documents, we would discard status documents from authorities
312 - Avoid a memory corruption bug when creating a hash table for
314 - Avoid controller-triggered crash when misusing certain commands
315 from a v0 controller on platforms that do not handle
316 printf("%s",NULL) gracefully.
317 - Don't crash when a controller sends a third argument to an
318 "extendcircuit" request.
319 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
320 response; fix error code when "getinfo dir/status/" fails.
321 - Avoid crash when telling controller stream-status and a stream
323 - Patch from Adam Langley to fix assert() in eventdns.c.
324 - Fix a debug log message in eventdns to say "X resolved to Y"
325 instead of "X resolved to X".
326 - Make eventdns give strings for DNS errors, not just error numbers.
327 - Track unreachable entry guards correctly: don't conflate
328 'unreachable by us right now' with 'listed as down by the directory
329 authorities'. With the old code, if a guard was unreachable by
330 us but listed as running, it would clog our guard list forever.
331 - Behave correctly in case we ever have a network with more than
332 2GB/s total advertised capacity.
333 - Make TrackExitHosts case-insensitive, and fix the behavior of
334 ".suffix" TrackExitHosts items to avoid matching in the middle of
336 - Finally fix the openssl warnings from newer gccs that believe that
337 ignoring a return value is okay, but casting a return value and
338 then ignoring it is a sign of madness.
339 - Prevent the contrib/exitlist script from printing the same
340 result more than once.
341 - Patch from Steve Hildrey: Generate network status correctly on
342 non-versioning dirservers.
343 - Don't listen to the X-Your-Address-Is hint if you did the lookup
344 via Tor; otherwise you'll think you're the exit node's IP address.
346 o Minor bugfixes, performance:
347 - Two small performance improvements on parsing descriptors.
348 - Major performance improvement on inserting descriptors: change
349 algorithm from O(n^2) to O(n).
350 - Make the common memory allocation path faster on machines where
351 malloc(0) returns a pointer.
352 - Start remembering X-Your-Address-Is directory hints even if you're
353 a client, so you can become a server more smoothly.
354 - Avoid duplicate entries on MyFamily line in server descriptor.
356 o Packaging, features:
357 - Remove architecture from OS X builds. The official builds are
358 now universal binaries.
359 - The Debian package now uses --verify-config when (re)starting,
360 to distinguish configuration errors from other errors.
361 - Update RPMs to require libevent 1.1b.
363 o Packaging, bugfixes:
364 - Patches so Tor builds with MinGW on Windows.
365 - Patches so Tor might run on Cygwin again.
366 - Resume building on non-gcc compilers and ancient gcc. Resume
367 building with the -O0 compile flag. Resume building cleanly on
369 - Run correctly on OS X platforms with case-sensitive filesystems.
370 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
371 - Add autoconf checks so Tor can build on Solaris x86 again.
374 - Documented (and renamed) ServerDNSSearchDomains and
375 ServerDNSResolvConfFile options.
376 - Be clearer that the *ListenAddress directives can be repeated
380 Changes in version 0.1.2.1-alpha - 2006-08-27
382 - Add "eventdns" async dns library from Adam Langley, tweaked to
383 build on OSX and Windows. Only enabled if you pass the
384 --enable-eventdns argument to configure.
385 - Allow servers with no hostname or IP address to learn their
386 IP address by asking the directory authorities. This code only
387 kicks in when you would normally have exited with a "no address"
388 error. Nothing's authenticated, so use with care.
389 - Rather than waiting a fixed amount of time between retrying
390 application connections, we wait only 5 seconds for the first,
391 10 seconds for the second, and 15 seconds for each retry after
392 that. Hopefully this will improve the expected user experience.
393 - Patch from Tup to add support for transparent AP connections:
394 this basically bundles the functionality of trans-proxy-tor
395 into the Tor mainline. Now hosts with compliant pf/netfilter
396 implementations can redirect TCP connections straight to Tor
397 without diverting through SOCKS. Needs docs.
398 - Busy directory servers save lots of memory by spooling server
399 descriptors, v1 directories, and v2 networkstatus docs to buffers
400 as needed rather than en masse. Also mmap the cached-routers
401 files, so we don't need to keep the whole thing in memory too.
402 - Automatically avoid picking more than one node from the same
403 /16 network when constructing a circuit.
404 - Revise and clean up the torrc.sample that we ship with; add
405 a section for BandwidthRate and BandwidthBurst.
408 - Split circuit_t into origin_circuit_t and or_circuit_t, and
409 split connection_t into edge, or, dir, control, and base structs.
410 These will save quite a bit of memory on busy servers, and they'll
411 also help us track down bugs in the code and bugs in the spec.
412 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
413 or later. Log when we are doing this, so we can diagnose it when
414 it fails. (Also, recommend libevent 1.1b for kqueue and
415 win32 methods; deprecate libevent 1.0b harder; make libevent
416 recommendation system saner.)
417 - Start being able to build universal binaries on OS X (thanks
419 - Export the default exit policy via the control port, so controllers
420 don't need to guess what it is / will be later.
421 - Add a man page entry for ProtocolWarnings.
422 - Add TestVia config option to the man page.
423 - Remove even more protocol-related warnings from Tor server logs,
424 such as bad TLS handshakes and malformed begin cells.
425 - Stop fetching descriptors if you're not a dir mirror and you
426 haven't tried to establish any circuits lately. [This currently
427 causes some dangerous behavior, because when you start up again
428 you'll use your ancient server descriptors.]
429 - New DirPort behavior: if you have your dirport set, you download
430 descriptors aggressively like a directory mirror, whether or not
432 - Get rid of the router_retry_connections notion. Now routers
433 no longer try to rebuild long-term connections to directory
434 authorities, and directory authorities no longer try to rebuild
435 long-term connections to all servers. We still don't hang up
436 connections in these two cases though -- we need to look at it
437 more carefully to avoid flapping, and we likely need to wait til
439 - Drop compatibility with obsolete Tors that permit create cells
440 to have the wrong circ_id_type.
441 - Re-enable per-connection rate limiting. Get rid of the "OP
442 bandwidth" concept. Lay groundwork for "bandwidth classes" --
443 separate global buckets that apply depending on what sort of conn
445 - Start publishing one minute or so after we find our ORPort
446 to be reachable. This will help reduce the number of descriptors
447 we have for ourselves floating around, since it's quite likely
448 other things (e.g. DirPort) will change during that minute too.
449 - Fork the v1 directory protocol into its own spec document,
450 and mark dir-spec.txt as the currently correct (v2) spec.
453 - When we find our DirPort to be reachable, publish a new descriptor
454 so we'll tell the world (reported by pnx).
455 - Publish a new descriptor after we hup/reload. This is important
456 if our config has changed such that we'll want to start advertising
457 our DirPort now, etc.
458 - Allow Tor to start when RunAsDaemon is set but no logs are set.
459 - When we have a state file we cannot parse, tell the user and
460 move it aside. Now we avoid situations where the user starts
461 Tor in 1904, Tor writes a state file with that timestamp in it,
462 the user fixes her clock, and Tor refuses to start.
463 - Fix configure.in to not produce broken configure files with
464 more recent versions of autoconf. Thanks to Clint for his auto*
466 - "tor --verify-config" now exits with -1(255) or 0 depending on
467 whether the config options are bad or good.
468 - Resolve bug 321 when using dnsworkers: append a period to every
469 address we resolve at the exit node, so that we do not accidentally
470 pick up local addresses, and so that failing searches are retried
471 in the resolver search domains. (This is already solved for
472 eventdns.) (This breaks Blossom servers for now.)
473 - If we are using an exit enclave and we can't connect, e.g. because
474 its webserver is misconfigured to not listen on localhost, then
475 back off and try connecting from somewhere else before we fail.
478 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
479 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
480 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
481 when the IP address is mapped through MapAddress to a hostname.
482 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
483 useless IPv6 DNS resolves.
484 - Patch suggested by Karsten Loesing: respond to SIGNAL command
485 before we execute the signal, in case the signal shuts us down.
486 - Clean up AllowInvalidNodes man page entry.
487 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
488 - Add more asserts to track down an assert error on a windows Tor
489 server with connection_add being called with socket == -1.
490 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
491 - Fix misleading log messages: an entry guard that is "unlisted",
492 as well as not known to be "down" (because we've never heard
493 of it), is not therefore "up".
494 - Remove code to special-case "-cvs" ending, since it has not
495 actually mattered since 0.0.9.
496 - Make our socks5 handling more robust to broken socks clients:
497 throw out everything waiting on the buffer in between socks
498 handshake phases, since they can't possibly (so the theory
499 goes) have predicted what we plan to respond to them.
502 Changes in version 0.1.1.26 - 2006-12-14
504 - Stop sending the HttpProxyAuthenticator string to directory
505 servers when directory connections are tunnelled through Tor.
506 - Clients no longer store bandwidth history in the state file.
507 - Do not log introduction points for hidden services if SafeLogging
511 - Fix an assert failure when a directory authority sets
512 AuthDirRejectUnlisted and then receives a descriptor from an
513 unlisted router (reported by seeess).
516 Changes in version 0.1.1.25 - 2006-11-04
518 - When a client asks us to resolve (rather than connect to)
519 an address, and we have a cached answer, give them the cached
520 answer. Previously, we would give them no answer at all.
521 - We were building exactly the wrong circuits when we predict
522 hidden service requirements, meaning Tor would have to build all
523 its circuits on demand.
524 - If none of our live entry guards have a high uptime, but we
525 require a guard with a high uptime, try adding a new guard before
526 we give up on the requirement. This patch should make long-lived
527 connections more stable on average.
528 - When testing reachability of our DirPort, don't launch new
529 tests when there's already one in progress -- unreachable
530 servers were stacking up dozens of testing streams.
533 - When the user sends a NEWNYM signal, clear the client-side DNS
534 cache too. Otherwise we continue to act on previous information.
537 - Avoid a memory corruption bug when creating a hash table for
539 - Avoid possibility of controller-triggered crash when misusing
540 certain commands from a v0 controller on platforms that do not
541 handle printf("%s",NULL) gracefully.
542 - Avoid infinite loop on unexpected controller input.
543 - Don't log spurious warnings when we see a circuit close reason we
544 don't recognize; it's probably just from a newer version of Tor.
545 - Add Vidalia to the OS X uninstaller script, so when we uninstall
546 Tor/Privoxy we also uninstall Vidalia.
549 Changes in version 0.1.1.24 - 2006-09-29
551 - Allow really slow clients to not hang up five minutes into their
552 directory downloads (suggested by Adam J. Richter).
553 - Fix major performance regression from 0.1.0.x: instead of checking
554 whether we have enough directory information every time we want to
555 do something, only check when the directory information has changed.
556 This should improve client CPU usage by 25-50%.
557 - Don't crash if, after a server has been running for a while,
558 it can't resolve its hostname.
559 - When a client asks us to resolve (not connect to) an address,
560 and we have a cached answer, give them the cached answer.
561 Previously, we would give them no answer at all.
564 - Allow Tor to start when RunAsDaemon is set but no logs are set.
565 - Don't crash when the controller receives a third argument to an
566 "extendcircuit" request.
567 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
568 response; fix error code when "getinfo dir/status/" fails.
569 - Fix configure.in to not produce broken configure files with
570 more recent versions of autoconf. Thanks to Clint for his auto*
572 - Fix security bug on NetBSD that could allow someone to force
573 uninitialized RAM to be sent to a server's DNS resolver. This
574 only affects NetBSD and other platforms that do not bounds-check
576 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
577 methods: these are known to be buggy.
578 - If we're a directory mirror and we ask for "all" network status
579 documents, we would discard status documents from authorities
583 Changes in version 0.1.1.23 - 2006-07-30
585 - Fast Tor servers, especially exit nodes, were triggering asserts
586 due to a bug in handling the list of pending DNS resolves. Some
587 bugs still remain here; we're hunting them.
588 - Entry guards could crash clients by sending unexpected input.
589 - More fixes on reachability testing: if you find yourself reachable,
590 then don't ever make any client requests (so you stop predicting
591 circuits), then hup or have your clock jump, then later your IP
592 changes, you won't think circuits are working, so you won't try to
593 test reachability, so you won't publish.
596 - Avoid a crash if the controller does a resetconf firewallports
597 and then a setconf fascistfirewall=1.
598 - Avoid an integer underflow when the dir authority decides whether
599 a router is stable: we might wrongly label it stable, and compute
600 a slightly wrong median stability, when a descriptor is published
602 - Fix a place where we might trigger an assert if we can't build our
603 own server descriptor yet.
606 Changes in version 0.1.1.22 - 2006-07-05
608 - Fix a big bug that was causing servers to not find themselves
609 reachable if they changed IP addresses. Since only 0.1.1.22+
610 servers can do reachability testing correctly, now we automatically
611 make sure to test via one of these.
612 - Fix to allow clients and mirrors to learn directory info from
613 descriptor downloads that get cut off partway through.
614 - Directory authorities had a bug in deciding if a newly published
615 descriptor was novel enough to make everybody want a copy -- a few
616 servers seem to be publishing new descriptors many times a minute.
618 - Fix a rare bug that was causing some servers to complain about
619 "closing wedged cpuworkers" and skip some circuit create requests.
620 - Make the Exit flag in directory status documents actually work.
623 Changes in version 0.1.1.21 - 2006-06-10
624 o Crash and assert fixes from 0.1.1.20:
625 - Fix a rare crash on Tor servers that have enabled hibernation.
626 - Fix a seg fault on startup for Tor networks that use only one
628 - Fix an assert from a race condition that occurs on Tor servers
629 while exiting, where various threads are trying to log that they're
630 exiting, and delete the logs, at the same time.
631 - Make our unit tests pass again on certain obscure platforms.
634 - Add support for building SUSE RPM packages.
635 - Speed up initial bootstrapping for clients: if we are making our
636 first ever connection to any entry guard, then don't mark it down
638 - When only one Tor server in the network is labelled as a guard,
639 and we've already picked him, we would cycle endlessly picking him
640 again, being unhappy about it, etc. Now we specifically exclude
641 current guards when picking a new guard.
642 - Servers send create cells more reliably after the TLS connection
643 is established: we were sometimes forgetting to send half of them
644 when we had more than one pending.
645 - If we get a create cell that asks us to extend somewhere, but the
646 Tor server there doesn't match the expected digest, we now send
647 a destroy cell back, rather than silently doing nothing.
648 - Make options->RedirectExit work again.
649 - Make cookie authentication for the controller work again.
650 - Stop being picky about unusual characters in the arguments to
651 mapaddress. It's none of our business.
652 - Add a new config option "TestVia" that lets you specify preferred
653 middle hops to use for test circuits. Perhaps this will let me
654 debug the reachability problems better.
656 o Log / documentation fixes:
657 - If we're a server and some peer has a broken TLS certificate, don't
658 log about it unless ProtocolWarnings is set, i.e., we want to hear
659 about protocol violations by others.
660 - Fix spelling of VirtualAddrNetwork in man page.
661 - Add a better explanation at the top of the autogenerated torrc file
662 about what happened to our old torrc.
665 Changes in version 0.1.1.20 - 2006-05-23
666 o Crash and assert fixes from 0.1.0.17:
667 - Fix assert bug in close_logs() on exit: when we close and delete
668 logs, remove them all from the global "logfiles" list.
669 - Fix an assert error when we're out of space in the connection_list
670 and we try to post a hidden service descriptor (reported by Peter
672 - Fix a rare assert error when we've tried all intro points for
673 a hidden service and we try fetching the service descriptor again:
674 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed".
675 - Setconf SocksListenAddress kills Tor if it fails to bind. Now back
676 out and refuse the setconf if it would fail.
677 - If you specify a relative torrc path and you set RunAsDaemon in
678 your torrc, then it chdir()'s to the new directory. If you then
679 HUP, it tries to load the new torrc location, fails, and exits.
680 The fix: no longer allow a relative path to torrc when using -f.
681 - Check for integer overflows in more places, when adding elements
682 to smartlists. This could possibly prevent a buffer overflow
683 on malicious huge inputs.
685 o Security fixes, major:
686 - When we're printing strings from the network, don't try to print
687 non-printable characters. Now we're safer against shell escape
688 sequence exploits, and also against attacks to fool users into
689 misreading their logs.
690 - Implement entry guards: automatically choose a handful of entry
691 nodes and stick with them for all circuits. Only pick new guards
692 when the ones you have are unsuitable, and if the old guards
693 become suitable again, switch back. This will increase security
694 dramatically against certain end-point attacks. The EntryNodes
695 config option now provides some hints about which entry guards you
696 want to use most; and StrictEntryNodes means to only use those.
698 - Implement exit enclaves: if we know an IP address for the
699 destination, and there's a running Tor server at that address
700 which allows exit to the destination, then extend the circuit to
701 that exit first. This provides end-to-end encryption and end-to-end
702 authentication. Also, if the user wants a .exit address or enclave,
703 use 4 hops rather than 3, and cannibalize a general circ for it
705 - Obey our firewall options more faithfully:
706 . If we can't get to a dirserver directly, try going via Tor.
707 . Don't ever try to connect (as a client) to a place our
708 firewall options forbid.
709 . If we specify a proxy and also firewall options, obey the
710 firewall options even when we're using the proxy: some proxies
711 can only proxy to certain destinations.
712 - Make clients regenerate their keys when their IP address changes.
713 - For the OS X package's modified privoxy config file, comment
714 out the "logfile" line so we don't log everything passed
716 - Our TLS handshakes were generating a single public/private
717 keypair for the TLS context, rather than making a new one for
718 each new connection. Oops. (But we were still rotating them
719 periodically, so it's not so bad.)
720 - When we were cannibalizing a circuit with a particular exit
721 node in mind, we weren't checking to see if that exit node was
722 already present earlier in the circuit. Now we are.
723 - Require server descriptors to list IPv4 addresses -- hostnames
724 are no longer allowed. This also fixes potential vulnerabilities
725 to servers providing hostnames as their address and then
726 preferentially resolving them so they can partition users.
727 - Our logic to decide if the OR we connected to was the right guy
728 was brittle and maybe open to a mitm for invalid routers.
730 o Security fixes, minor:
731 - Adjust tor-spec.txt to parameterize cell and key lengths. Now
732 Ian Goldberg can prove things about our handshake protocol more
734 - Make directory authorities generate a separate "guard" flag to
735 mean "would make a good entry guard". Clients now honor the
736 is_guard flag rather than looking at is_fast or is_stable.
737 - Try to list MyFamily elements by key, not by nickname, and warn
738 if we've not heard of a server.
739 - Start using RAND_bytes rather than RAND_pseudo_bytes from
740 OpenSSL. Also, reseed our entropy every hour, not just at
741 startup. And add entropy in 512-bit chunks, not 160-bit chunks.
742 - Refuse server descriptors where the fingerprint line doesn't match
743 the included identity key. Tor doesn't care, but other apps (and
744 humans) might actually be trusting the fingerprint line.
745 - We used to kill the circuit when we receive a relay command we
746 don't recognize. Now we just drop that cell.
747 - Fix a bug found by Lasse Overlier: when we were making internal
748 circuits (intended to be cannibalized later for rendezvous and
749 introduction circuits), we were picking them so that they had
750 useful exit nodes. There was no need for this, and it actually
751 aids some statistical attacks.
752 - Start treating internal circuits and exit circuits separately.
753 It's important to keep them separate because internal circuits
754 have their last hops picked like middle hops, rather than like
755 exit hops. So exiting on them will break the user's expectations.
756 - Fix a possible way to DoS dirservers.
757 - When the client asked for a rendezvous port that the hidden
758 service didn't want to provide, we were sending an IP address
759 back along with the end cell. Fortunately, it was zero. But stop
762 o Packaging improvements:
763 - Implement --with-libevent-dir option to ./configure. Improve
764 search techniques to find libevent, and use those for openssl too.
765 - Fix a couple of bugs in OpenSSL detection. Deal better when
766 there are multiple SSLs installed with different versions.
767 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
768 - On non-gcc compilers (e.g. Solaris's cc), use "-g -O" instead of
770 - Make unit tests (and other invocations that aren't the real Tor)
771 run without launching listeners, creating subdirectories, and so on.
772 - The OS X installer was adding a symlink for tor_resolve but
773 the binary was called tor-resolve (reported by Thomas Hardly).
774 - Now we can target arch and OS in rpm builds (contributed by
775 Phobos). Also make the resulting dist-rpm filename match the
777 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
778 if you log to syslog and want something other than LOG_DAEMON.
779 - Fix the torify (tsocks) config file to not use Tor for localhost
781 - Start shipping socks-extensions.txt, tor-doc-unix.html,
782 tor-doc-server.html, and stylesheet.css in the tarball.
783 - Stop shipping tor-doc.html, INSTALL, and README in the tarball.
784 They are useless now.
785 - Add Peter Palfrader's contributed check-tor script. It lets you
786 easily check whether a given server (referenced by nickname)
788 - Add BSD-style contributed startup script "rc.subr" from Peter
791 o Directory improvements -- new directory protocol:
792 - See tor/doc/dir-spec.txt for all the juicy details. Key points:
793 - Authorities and caches publish individual descriptors (by
794 digest, by fingerprint, by "all", and by "tell me yours").
795 - Clients don't download or use the old directory anymore. Now they
796 download network-statuses from the directory authorities, and
797 fetch individual server descriptors as needed from mirrors.
798 - Clients don't download descriptors of non-running servers.
799 - Download descriptors by digest, not by fingerprint. Caches try to
800 download all listed digests from authorities; clients try to
801 download "best" digests from caches. This avoids partitioning
802 and isolating attacks better.
803 - Only upload a new server descriptor when options change, 18
804 hours have passed, uptime is reset, or bandwidth changes a lot.
805 - Directory authorities silently throw away new descriptors that
806 haven't changed much if the timestamps are similar. We do this to
807 tolerate older Tor servers that upload a new descriptor every 15
808 minutes. (It seemed like a good idea at the time.)
809 - Clients choose directory servers from the network status lists,
810 not from their internal list of router descriptors. Now they can
811 go to caches directly rather than needing to go to authorities
812 to bootstrap the first set of descriptors.
813 - When picking a random directory, prefer non-authorities if any
815 - Add a new flag to network-status indicating whether the server
816 can answer v2 directory requests too.
817 - Directory mirrors now cache up to 16 unrecognized network-status
818 docs, so new directory authorities will be cached too.
819 - Stop parsing, storing, or using running-routers output (but
820 mirrors still cache and serve it).
821 - Clients consider a threshold of "versioning" directory authorities
822 before deciding whether to warn the user that he's obsolete.
823 - Authorities publish separate sorted lists of recommended versions
824 for clients and for servers.
825 - Change DirServers config line to note which dirs are v1 authorities.
826 - Put nicknames on the DirServer line, so we can refer to them
827 without requiring all our users to memorize their IP addresses.
828 - Remove option when getting directory cache to see whether they
829 support running-routers; they all do now. Replace it with one
830 to see whether caches support v2 stuff.
831 - Stop listing down or invalid nodes in the v1 directory. This
832 reduces its bulk by about 1/3, and reduces load on mirrors.
833 - Mirrors no longer cache the v1 directory as often.
834 - If we as a directory mirror don't know of any v1 directory
835 authorities, then don't try to cache any v1 directories.
837 o Other directory improvements:
838 - Add lefkada.eecs.harvard.edu and tor.dizum.com as fourth and
839 fifth authoritative directory servers.
840 - Directory authorities no longer require an open connection from
841 a server to consider him "reachable". We need this change because
842 when we add new directory authorities, old servers won't know not
844 - Dir authorities now do their own external reachability testing
845 of each server, and only list as running the ones they found to
846 be reachable. We also send back warnings to the server's logs if
847 it uploads a descriptor that we already believe is unreachable.
848 - Spread the directory authorities' reachability testing over the
849 entire testing interval, so we don't try to do 500 TLS's at once
851 - Make the "stable" router flag in network-status be the median of
852 the uptimes of running valid servers, and make clients pay
853 attention to the network-status flags. Thus the cutoff adapts
854 to the stability of the network as a whole, making IRC, IM, etc
855 connections more reliable.
856 - Make the v2 dir's "Fast" flag based on relative capacity, just
857 like "Stable" is based on median uptime. Name everything in the
858 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
859 - Retry directory requests if we fail to get an answer we like
860 from a given dirserver (we were retrying before, but only if
862 - Return a robots.txt on our dirport to discourage google indexing.
864 o Controller protocol improvements:
865 - Revised controller protocol (version 1) that uses ascii rather
866 than binary: tor/doc/control-spec.txt. Add supporting libraries
867 in python and java and c# so you can use the controller from your
868 applications without caring how our protocol works.
869 - Allow the DEBUG controller event to work again. Mark certain log
870 entries as "don't tell this to controllers", so we avoid cycles.
871 - New controller function "getinfo accounting", to ask how
872 many bytes we've used in this time period.
873 - Add a "resetconf" command so you can set config options like
874 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
875 a config option in the torrc with no value, then it clears it
876 entirely (rather than setting it to its default).
877 - Add a "getinfo config-file" to tell us where torrc is. Also
878 expose guard nodes, config options/names.
879 - Add a "quit" command (when when using the controller manually).
880 - Add a new signal "newnym" to "change pseudonyms" -- that is, to
881 stop using any currently-dirty circuits for new streams, so we
882 don't link new actions to old actions. This also occurs on HUP
884 - If we would close a stream early (e.g. it asks for a .exit that
885 we know would refuse it) but the LeaveStreamsUnattached config
886 option is set by the controller, then don't close it.
887 - Add a new controller event type "authdir_newdescs" that allows
888 controllers to get all server descriptors that were uploaded to
889 a router in its role as directory authority.
890 - New controller option "getinfo desc/all-recent" to fetch the
891 latest server descriptor for every router that Tor knows about.
892 - Fix the controller's "attachstream 0" command to treat conn like
893 it just connected, doing address remapping, handling .exit and
894 .onion idioms, and so on. Now we're more uniform in making sure
895 that the controller hears about new and closing connections.
896 - Permit transitioning from ORPort==0 to ORPort!=0, and back, from
897 the controller. Also, rotate dns and cpu workers if the controller
898 changes options that will affect them; and initialize the dns
899 worker cache tree whether or not we start out as a server.
900 - Add a new circuit purpose 'controller' to let the controller ask
901 for a circuit that Tor won't try to use. Extend the "extendcircuit"
902 controller command to let you specify the purpose if you're starting
903 a new circuit. Add a new "setcircuitpurpose" controller command to
904 let you change a circuit's purpose after it's been created.
905 - Let the controller ask for "getinfo dir/server/foo" so it can ask
906 directly rather than connecting to the dir port. "getinfo
907 dir/status/foo" also works, but currently only if your DirPort
909 - Let the controller tell us about certain router descriptors
910 that it doesn't want Tor to use in circuits. Implement
911 "setrouterpurpose" and modify "+postdescriptor" to do this.
912 - If the controller's *setconf commands fail, collect an error
913 message in a string and hand it back to the controller -- don't
914 just tell them to go read their logs.
916 o Scalability, resource management, and performance:
917 - Fix a major load balance bug: we were round-robin reading in 16 KB
918 chunks, and servers with bandwidthrate of 20 KB, while downloading
919 a 600 KB directory, would starve their other connections. Now we
920 try to be a bit more fair.
921 - Be more conservative about whether to advertise our DirPort.
922 The main change is to not advertise if we're running at capacity
923 and either a) we could hibernate ever or b) our capacity is low
924 and we're using a default DirPort.
925 - We weren't cannibalizing circuits correctly for
926 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
927 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
928 build those from scratch. This should make hidden services faster.
929 - Predict required circuits better, with an eye toward making hidden
930 services faster on the service end.
931 - Compress exit policies even more: look for duplicate lines and
933 - Generate 18.0.0.0/8 address policy format in descs when we can;
934 warn when the mask is not reducible to a bit-prefix.
935 - There used to be two ways to specify your listening ports in a
936 server descriptor: on the "router" line and with a separate "ports"
937 line. Remove support for the "ports" line.
938 - Reduce memory requirements in our structs by changing the order
939 of fields. Replace balanced trees with hash tables. Inline
940 bottleneck smartlist functions. Add a "Map from digest to void*"
941 abstraction so we can do less hex encoding/decoding, and use it
942 in router_get_by_digest(). Many other CPU and memory improvements.
943 - Allow tor_gzip_uncompress to extract as much as possible from
944 truncated compressed data. Try to extract as many
945 descriptors as possible from truncated http responses (when
946 purpose is DIR_PURPOSE_FETCH_ROUTERDESC).
947 - Make circ->onionskin a pointer, not a static array. moria2 was using
948 125000 circuit_t's after it had been up for a few weeks, which
949 translates to 20+ megs of wasted space.
950 - The private half of our EDH handshake keys are now chosen out
951 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
952 - Stop doing the complex voodoo overkill checking for insecure
953 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
954 - Do round-robin writes for TLS of at most 16 kB per write. This
955 might be more fair on loaded Tor servers.
956 - Do not use unaligned memory access on alpha, mips, or mipsel.
957 It *works*, but is very slow, so we treat them as if it doesn't.
959 o Other bugfixes and improvements:
960 - Start storing useful information to $DATADIR/state, so we can
961 remember things across invocations of Tor. Retain unrecognized
962 lines so we can be forward-compatible, and write a TorVersion line
963 so we can be backward-compatible.
964 - If ORPort is set, Address is not explicitly set, and our hostname
965 resolves to a private IP address, try to use an interface address
966 if it has a public address. Now Windows machines that think of
967 themselves as localhost can guess their address.
968 - Regenerate our local descriptor if it's dirty and we try to use
969 it locally (e.g. if it changes during reachability detection).
970 This was causing some Tor servers to keep publishing the same
971 initial descriptor forever.
972 - Tor servers with dynamic IP addresses were needing to wait 18
973 hours before they could start doing reachability testing using
974 the new IP address and ports. This is because they were using
975 the internal descriptor to learn what to test, yet they were only
976 rebuilding the descriptor once they decided they were reachable.
977 - It turns out we couldn't bootstrap a network since we added
978 reachability detection in 0.1.0.1-rc. Good thing the Tor network
979 has never gone down. Add an AssumeReachable config option to let
980 servers and authorities bootstrap. When we're trying to build a
981 high-uptime or high-bandwidth circuit but there aren't enough
982 suitable servers, try being less picky rather than simply failing.
983 - Newly bootstrapped Tor networks couldn't establish hidden service
984 circuits until they had nodes with high uptime. Be more tolerant.
985 - Really busy servers were keeping enough circuits open on stable
986 connections that they were wrapping around the circuit_id
987 space. (It's only two bytes.) This exposed a bug where we would
988 feel free to reuse a circuit_id even if it still exists but has
989 been marked for close. Try to fix this bug. Some bug remains.
990 - When we fail to bind or listen on an incoming or outgoing
991 socket, we now close it before refusing, rather than just
992 leaking it. (Thanks to Peter Palfrader for finding.)
993 - Fix a file descriptor leak in start_daemon().
994 - On Windows, you can't always reopen a port right after you've
995 closed it. So change retry_listeners() to only close and re-open
996 ports that have changed.
997 - Workaround a problem with some http proxies that refuse GET
998 requests that specify "Content-Length: 0". Reported by Adrian.
999 - Recover better from TCP connections to Tor servers that are
1000 broken but don't tell you (it happens!); and rotate TLS
1001 connections once a week.
1002 - Fix a scary-looking but apparently harmless bug where circuits
1003 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
1004 servers, and never switch to state CIRCUIT_STATE_OPEN.
1005 - Check for even more Windows version flags when writing the platform
1006 string in server descriptors, and note any we don't recognize.
1007 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
1008 get a better idea of why their circuits failed. Not used yet.
1009 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
1010 We don't use them yet, but maybe one day our DNS resolver will be
1011 able to discover them.
1012 - Let people type "tor --install" as well as "tor -install" when they
1013 want to make it an NT service.
1014 - Looks like we were never delivering deflated (i.e. compressed)
1015 running-routers lists, even when asked. Oops.
1016 - We were leaking some memory every time the client changed IPs.
1017 - Clean up more of the OpenSSL memory when exiting, so we can detect
1018 memory leaks better.
1019 - Never call free() on tor_malloc()d memory. This will help us
1020 use dmalloc to detect memory leaks.
1021 - Some Tor servers process billions of cells per day. These
1022 statistics are now uint64_t's.
1023 - Check [X-]Forwarded-For headers in HTTP requests when generating
1024 log messages. This lets people run dirservers (and caches) behind
1025 Apache but still know which IP addresses are causing warnings.
1026 - Fix minor integer overflow in calculating when we expect to use up
1027 our bandwidth allocation before hibernating.
1028 - Lower the minimum required number of file descriptors to 1000,
1029 so we can have some overhead for Valgrind on Linux, where the
1030 default ulimit -n is 1024.
1031 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
1032 and its existence is confusing some users.
1034 o Config option fixes:
1035 - Add a new config option ExitPolicyRejectPrivate which defaults
1036 to on. Now all exit policies will begin with rejecting private
1037 addresses, unless the server operator explicitly turns it off.
1038 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB.
1039 - Add new ReachableORAddresses and ReachableDirAddresses options
1040 that understand address policies. FascistFirewall is now a synonym
1041 for "ReachableORAddresses *:443", "ReachableDirAddresses *:80".
1042 - Start calling it FooListenAddress rather than FooBindAddress,
1043 since few of our users know what it means to bind an address
1045 - If the user gave Tor an odd number of command-line arguments,
1046 we were silently ignoring the last one. Now we complain and fail.
1047 This wins the oldest-bug prize -- this bug has been present since
1048 November 2002, as released in Tor 0.0.0.
1049 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
1050 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
1051 it would silently ignore the 6668.
1052 - If we get a linelist or linelist_s config option from the torrc,
1053 e.g. ExitPolicy, and it has no value, warn and skip rather than
1054 silently resetting it to its default.
1055 - Setconf was appending items to linelists, not clearing them.
1056 - Add MyFamily to torrc.sample in the server section, so operators
1057 will be more likely to learn that it exists.
1058 - Make ContactInfo mandatory for authoritative directory servers.
1059 - MaxConn has been obsolete for a while now. Document the ConnLimit
1060 config option, which is a *minimum* number of file descriptors
1061 that must be available else Tor refuses to start.
1062 - Get rid of IgnoreVersion undocumented config option, and make us
1063 only warn, never exit, when we're running an obsolete version.
1064 - Make MonthlyAccountingStart config option truly obsolete now.
1065 - Correct the man page entry on TrackHostExitsExpire.
1066 - Let directory authorities start even if they don't specify an
1067 Address config option.
1068 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
1069 reflect the updated flags in our v2 dir protocol.
1071 o Config option features:
1072 - Add a new config option FastFirstHopPK (on by default) so clients
1073 do a trivial crypto handshake for their first hop, since TLS has
1074 already taken care of confidentiality and authentication.
1075 - Let the user set ControlListenAddress in the torrc. This can be
1076 dangerous, but there are some cases (like a secured LAN) where it
1078 - New config options to help controllers: FetchServerDescriptors
1079 and FetchHidServDescriptors for whether to fetch server
1080 info and hidserv info or let the controller do it, and
1081 PublishServerDescriptor and PublishHidServDescriptors.
1082 - Also let the controller set the __AllDirActionsPrivate config
1083 option if you want all directory fetches/publishes to happen via
1084 Tor (it assumes your controller bootstraps your circuits).
1085 - Add "HardwareAccel" config option: support for crypto hardware
1086 accelerators via OpenSSL. Off by default, until we find somebody
1087 smart who can test it for us. (It appears to produce seg faults
1088 in at least some cases.)
1089 - New config option "AuthDirRejectUnlisted" for directory authorities
1090 as a panic button: if we get flooded with unusable servers we can
1091 revert to only listing servers in the approved-routers file.
1092 - Directory authorities can now reject/invalidate by key and IP,
1093 with the config options "AuthDirInvalid" and "AuthDirReject", or
1094 by marking a fingerprint as "!reject" or "!invalid" (as its
1095 nickname) in the approved-routers file. This is useful since
1096 currently we automatically list servers as running and usable
1097 even if we know they're jerks.
1098 - Add a new config option TestSocks so people can see whether their
1099 applications are using socks4, socks4a, socks5-with-ip, or
1100 socks5-with-fqdn. This way they don't have to keep mucking
1101 with tcpdump and wondering if something got cached somewhere.
1102 - Add "private:*" as an alias in configuration for policies. Now
1103 you can simplify your exit policy rather than needing to list
1104 every single internal or nonroutable network space.
1105 - Accept "private:*" in routerdesc exit policies; not generated yet
1106 because older Tors do not understand it.
1107 - Add configuration option "V1AuthoritativeDirectory 1" which
1108 moria1, moria2, and tor26 have set.
1109 - Implement an option, VirtualAddrMask, to set which addresses
1110 get handed out in response to mapaddress requests. This works
1111 around a bug in tsocks where 127.0.0.0/8 is never socksified.
1112 - Add a new config option FetchUselessDescriptors, off by default,
1113 for when you plan to run "exitlist" on your client and you want
1114 to know about even the non-running descriptors.
1115 - SocksTimeout: How long do we let a socks connection wait
1116 unattached before we fail it?
1117 - CircuitBuildTimeout: Cull non-open circuits that were born
1118 at least this many seconds ago.
1119 - CircuitIdleTimeout: Cull open clean circuits that were born
1120 at least this many seconds ago.
1121 - New config option SafeSocks to reject all application connections
1122 using unsafe socks protocols. Defaults to off.
1124 o Improved and clearer log messages:
1125 - Reduce clutter in server logs. We're going to try to make
1126 them actually usable now. New config option ProtocolWarnings that
1127 lets you hear about how _other Tors_ are breaking the protocol. Off
1129 - Divide log messages into logging domains. Once we put some sort
1130 of interface on this, it will let people looking at more verbose
1131 log levels specify the topics they want to hear more about.
1132 - Log server fingerprint on startup, so new server operators don't
1133 have to go hunting around their filesystem for it.
1134 - Provide dire warnings to any users who set DirServer manually;
1135 move it out of torrc.sample and into torrc.complete.
1136 - Make the log message less scary when all the dirservers are
1137 temporarily unreachable.
1138 - When tor_socketpair() fails in Windows, give a reasonable
1139 Windows-style errno back.
1140 - Improve tor_gettimeofday() granularity on windows.
1141 - We were printing the number of idle dns workers incorrectly when
1143 - Handle duplicate lines in approved-routers files without warning.
1144 - We were whining about using socks4 or socks5-with-local-lookup
1145 even when it's an IP address in the "virtual" range we designed
1146 exactly for this case.
1147 - Check for named servers when looking them up by nickname;
1148 warn when we're calling a non-named server by its nickname;
1149 don't warn twice about the same name.
1150 - Downgrade the dirserver log messages when whining about
1152 - Correct "your server is reachable" log entries to indicate that
1153 it was self-testing that told us so.
1154 - If we're trying to be a Tor server and running Windows 95/98/ME
1155 as a server, explain that we'll likely crash.
1156 - Provide a more useful warn message when our onion queue gets full:
1157 the CPU is too slow or the exit policy is too liberal.
1158 - Don't warn when we receive a 503 from a dirserver/cache -- this
1159 will pave the way for them being able to refuse if they're busy.
1160 - When we fail to bind a listener, try to provide a more useful
1161 log message: e.g., "Is Tor already running?"
1162 - Only start testing reachability once we've established a
1163 circuit. This will make startup on dir authorities less noisy.
1164 - Don't try to upload hidden service descriptors until we have
1165 established a circuit.
1166 - Tor didn't warn when it failed to open a log file.
1167 - Warn when listening on a public address for socks. We suspect a
1168 lot of people are setting themselves up as open socks proxies,
1169 and they have no idea that jerks on the Internet are using them,
1170 since they simply proxy the traffic into the Tor network.
1171 - Give a useful message when people run Tor as the wrong user,
1172 rather than telling them to start chowning random directories.
1173 - Fix a harmless bug that was causing Tor servers to log
1174 "Got an end because of misc error, but we're not an AP. Closing."
1175 - Fix wrong log message when you add a "HiddenServiceNodes" config
1176 line without any HiddenServiceDir line (reported by Chris Thomas).
1177 - Directory authorities now stop whining so loudly about bad
1178 descriptors that they fetch from other dirservers. So when there's
1179 a log complaint, it's for sure from a freshly uploaded descriptor.
1180 - When logging via syslog, include the pid whenever we provide
1181 a log entry. Suggested by Todd Fries.
1182 - When we're shutting down and we do something like try to post a
1183 server descriptor or rendezvous descriptor, don't complain that
1184 we seem to be unreachable. Of course we are, we're shutting down.
1185 - Change log line for unreachability to explicitly suggest /etc/hosts
1186 as the culprit. Also make it clearer what IP address and ports we're
1187 testing for reachability.
1188 - Put quotes around user-supplied strings when logging so users are
1189 more likely to realize if they add bad characters (like quotes)
1191 - NT service patch from Matt Edman to improve error messages on Win32.
1194 Changes in version 0.1.0.17 - 2006-02-17
1195 o Crash bugfixes on 0.1.0.x:
1196 - When servers with a non-zero DirPort came out of hibernation,
1197 sometimes they would trigger an assert.
1199 o Other important bugfixes:
1200 - On platforms that don't have getrlimit (like Windows), we were
1201 artificially constraining ourselves to a max of 1024
1202 connections. Now just assume that we can handle as many as 15000
1203 connections. Hopefully this won't cause other problems.
1205 o Backported features:
1206 - When we're a server, a client asks for an old-style directory,
1207 and our write bucket is empty, don't give it to him. This way
1208 small servers can continue to serve the directory *sometimes*,
1209 without getting overloaded.
1210 - Whenever you get a 503 in response to a directory fetch, try
1211 once more. This will become important once servers start sending
1212 503's whenever they feel busy.
1213 - Fetch a new directory every 120 minutes, not every 40 minutes.
1214 Now that we have hundreds of thousands of users running the old
1215 directory algorithm, it's starting to hurt a lot.
1216 - Bump up the period for forcing a hidden service descriptor upload
1217 from 20 minutes to 1 hour.
1220 Changes in version 0.1.0.16 - 2006-01-02
1221 o Crash bugfixes on 0.1.0.x:
1222 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1223 corrupting the heap, losing FDs, or crashing when we need to resize
1224 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1225 - It turns out sparc64 platforms crash on unaligned memory access
1226 too -- so detect and avoid this.
1227 - Handle truncated compressed data correctly (by detecting it and
1229 - Fix possible-but-unlikely free(NULL) in control.c.
1230 - When we were closing connections, there was a rare case that
1231 stomped on memory, triggering seg faults and asserts.
1232 - Avoid potential infinite recursion when building a descriptor. (We
1233 don't know that it ever happened, but better to fix it anyway.)
1234 - We were neglecting to unlink marked circuits from soon-to-close OR
1235 connections, which caused some rare scribbling on freed memory.
1236 - Fix a memory stomping race bug when closing the joining point of two
1237 rendezvous circuits.
1238 - Fix an assert in time parsing found by Steven Murdoch.
1240 o Other bugfixes on 0.1.0.x:
1241 - When we're doing reachability testing, provide more useful log
1242 messages so the operator knows what to expect.
1243 - Do not check whether DirPort is reachable when we are suppressing
1244 advertising it because of hibernation.
1245 - When building with -static or on Solaris, we sometimes needed -ldl.
1246 - One of the dirservers (tor26) changed its IP address.
1247 - When we're deciding whether a stream has enough circuits around
1248 that can handle it, count the freshly dirty ones and not the ones
1249 that are so dirty they won't be able to handle it.
1250 - When we're expiring old circuits, we had a logic error that caused
1251 us to close new rendezvous circuits rather than old ones.
1252 - Give a more helpful log message when you try to change ORPort via
1253 the controller: you should upgrade Tor if you want that to work.
1254 - We were failing to parse Tor versions that start with "Tor ".
1255 - Tolerate faulty streams better: when a stream fails for reason
1256 exitpolicy, stop assuming that the router is lying about his exit
1257 policy. When a stream fails for reason misc, allow it to retry just
1258 as if it was resolvefailed. When a stream has failed three times,
1259 reset its failure count so we can try again and get all three tries.
1262 Changes in version 0.1.0.15 - 2005-09-23
1263 o Bugfixes on 0.1.0.x:
1264 - Reject ports 465 and 587 (spam targets) in default exit policy.
1265 - Don't crash when we don't have any spare file descriptors and we
1266 try to spawn a dns or cpu worker.
1267 - Get rid of IgnoreVersion undocumented config option, and make us
1268 only warn, never exit, when we're running an obsolete version.
1269 - Don't try to print a null string when your server finds itself to
1270 be unreachable and the Address config option is empty.
1271 - Make the numbers in read-history and write-history into uint64s,
1272 so they don't overflow and publish negatives in the descriptor.
1273 - Fix a minor memory leak in smartlist_string_remove().
1274 - We were only allowing ourselves to upload a server descriptor at
1275 most every 20 minutes, even if it changed earlier than that.
1276 - Clean up log entries that pointed to old URLs.
1279 Changes in version 0.1.0.14 - 2005-08-08
1280 o Bugfixes on 0.1.0.x:
1281 - Fix the other half of the bug with crypto handshakes
1283 - Fix an assert trigger if you send a 'signal term' via the
1284 controller when it's listening for 'event info' messages.
1287 Changes in version 0.1.0.13 - 2005-08-04
1288 o Bugfixes on 0.1.0.x:
1289 - Fix a critical bug in the security of our crypto handshakes.
1290 - Fix a size_t underflow in smartlist_join_strings2() that made
1291 it do bad things when you hand it an empty smartlist.
1292 - Fix Windows installer to ship Tor license (thanks to Aphex for
1293 pointing out this oversight) and put a link to the doc directory
1295 - Explicitly set no-unaligned-access for sparc: it turns out the
1296 new gcc's let you compile broken code, but that doesn't make it
1300 Changes in version 0.1.0.12 - 2005-07-18
1301 o New directory servers:
1302 - tor26 has changed IP address.
1304 o Bugfixes on 0.1.0.x:
1305 - Fix a possible double-free in tor_gzip_uncompress().
1306 - When --disable-threads is set, do not search for or link against
1308 - Don't trigger an assert if an authoritative directory server
1309 claims its dirport is 0.
1310 - Fix bug with removing Tor as an NT service: some people were
1311 getting "The service did not return an error." Thanks to Matt
1315 Changes in version 0.1.0.11 - 2005-06-30
1316 o Bugfixes on 0.1.0.x:
1317 - Fix major security bug: servers were disregarding their
1318 exit policies if clients behaved unexpectedly.
1319 - Make OS X init script check for missing argument, so we don't
1320 confuse users who invoke it incorrectly.
1321 - Fix a seg fault in "tor --hash-password foo".
1322 - The MAPADDRESS control command was broken.
1325 Changes in version 0.1.0.10 - 2005-06-14
1327 - Make NT services work and start on startup on Win32 (based on
1328 patch by Matt Edman). See the FAQ entry for details.
1329 - Make 'platform' string in descriptor more accurate for Win32
1330 servers, so it's not just "unknown platform".
1331 - REUSEADDR on normal platforms means you can rebind to the port
1332 right after somebody else has let it go. But REUSEADDR on Win32
1333 means you can bind to the port _even when somebody else already
1334 has it bound_! So, don't do that on Win32.
1335 - Clean up the log messages when starting on Win32 with no config
1337 - Allow seeding the RNG on Win32 even when you're not running as
1338 Administrator. If seeding the RNG on Win32 fails, quit.
1340 o Assert / crash bugs:
1341 - Refuse relay cells that claim to have a length larger than the
1342 maximum allowed. This prevents a potential attack that could read
1343 arbitrary memory (e.g. keys) from an exit server's process
1345 - If unofficial Tor clients connect and send weird TLS certs, our
1346 Tor server triggers an assert. Stop asserting, and start handling
1347 TLS errors better in other situations too.
1348 - Fix a race condition that can trigger an assert when we have a
1349 pending create cell and an OR connection attempt fails.
1352 - Use pthreads for worker processes rather than forking. This was
1353 forced because when we forked, we ended up wasting a lot of
1354 duplicate ram over time.
1355 - Also switch to foo_r versions of some library calls to allow
1356 reentry and threadsafeness.
1357 - Implement --disable-threads configure option. Disable threads on
1358 netbsd and openbsd by default, because they have no reentrant
1359 resolver functions (!), and on solaris since it has other
1361 - Fix possible bug on threading platforms (e.g. win32) which was
1362 leaking a file descriptor whenever a cpuworker or dnsworker died.
1363 - Fix a minor memory leak when somebody establishes an introduction
1364 point at your Tor server.
1365 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1367 - Add ./configure --with-dmalloc option, to track memory leaks.
1368 - And try to free all memory on closing, so we can detect what
1371 o Protocol correctness:
1372 - When we've connected to an OR and handshaked but didn't like
1373 the result, we were closing the conn without sending destroy
1374 cells back for pending circuits. Now send those destroys.
1375 - Start sending 'truncated' cells back rather than destroy cells
1376 if the circuit closes in front of you. This means we won't have
1377 to abandon partially built circuits.
1378 - Handle changed router status correctly when dirserver reloads
1379 fingerprint file. We used to be dropping all unverified descriptors
1380 right then. The bug was hidden because we would immediately
1381 fetch a directory from another dirserver, which would include the
1382 descriptors we just dropped.
1383 - Revise tor-spec to add more/better stream end reasons.
1384 - Revise all calls to connection_edge_end to avoid sending 'misc',
1385 and to take errno into account where possible.
1386 - Client now retries when streams end early for 'hibernating' or
1387 'resource limit' reasons, rather than failing them.
1388 - Try to be more zealous about calling connection_edge_end when
1389 things go bad with edge conns in connection.c.
1391 o Robustness improvements:
1392 - Better handling for heterogeneous / unreliable nodes:
1393 - Annotate circuits with whether they aim to contain high uptime
1394 nodes and/or high capacity nodes. When building circuits, choose
1396 - This means that every single node in an intro rend circuit,
1397 not just the last one, will have a minimum uptime.
1398 - New config option LongLivedPorts to indicate application streams
1399 that will want high uptime circuits.
1400 - Servers reset uptime when a dir fetch entirely fails. This
1401 hopefully reflects stability of the server's network connectivity.
1402 - If somebody starts his tor server in Jan 2004 and then fixes his
1403 clock, don't make his published uptime be a year.
1404 - Reset published uptime when we wake up from hibernation.
1405 - Introduce a notion of 'internal' circs, which are chosen without
1406 regard to the exit policy of the last hop. Intro and rendezvous
1407 circs must be internal circs, to avoid leaking information. Resolve
1408 and connect streams can use internal circs if they want.
1409 - New circuit pooling algorithm: keep track of what destination ports
1410 we've used recently (start out assuming we'll want to use 80), and
1411 make sure to have enough circs around to satisfy these ports. Also
1412 make sure to have 2 internal circs around if we've required internal
1413 circs lately (and with high uptime if we've seen that lately too).
1414 - Turn addr_policy_compare from a tristate to a quadstate; this should
1415 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1416 for google.com" problem.
1417 - When a client asks us for a dir mirror and we don't have one,
1418 launch an attempt to get a fresh one.
1419 - First cut at support for "create-fast" cells. Clients can use
1420 these when extending to their first hop, since the TLS already
1421 provides forward secrecy and authentication. Not enabled on
1424 o Reachability testing.
1425 - Your Tor server will automatically try to see if its ORPort and
1426 DirPort are reachable from the outside, and it won't upload its
1427 descriptor until it decides at least ORPort is reachable (when
1428 DirPort is not yet found reachable, publish it as zero).
1429 - When building testing circs for ORPort testing, use only
1430 high-bandwidth nodes, so fewer circuits fail.
1431 - Notice when our IP changes, and reset stats/uptime/reachability.
1432 - Authdirservers don't do ORPort reachability detection, since
1433 they're in clique mode, so it will be rare to find a server not
1434 already connected to them.
1435 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1439 - Now we allow two unverified servers with the same nickname
1440 but different keys. But if a nickname is verified, only that
1441 nickname+key are allowed.
1442 - If you're an authdirserver connecting to an address:port,
1443 and it's not the OR you were expecting, forget about that
1444 descriptor. If he *was* the one you were expecting, then forget
1445 about all other descriptors for that address:port.
1446 - Allow servers to publish descriptors from 12 hours in the future.
1447 Corollary: only whine about clock skew from the dirserver if
1448 he's a trusted dirserver (since now even verified servers could
1449 have quite wrong clocks).
1450 - Require servers that use the default dirservers to have public IP
1451 addresses. We have too many servers that are configured with private
1452 IPs and their admins never notice the log entries complaining that
1453 their descriptors are being rejected.
1455 o Efficiency improvements:
1456 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1457 and /dev/poll), and hopefully work better on Windows too.
1458 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1459 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1460 - Find libevent even if it's hiding in /usr/local/ and your
1461 CFLAGS and LDFLAGS don't tell you to look there.
1462 - Be able to link with libevent as a shared library (the default
1463 after 1.0d), even if it's hiding in /usr/local/lib and even
1464 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1465 assuming you're running gcc. Otherwise fail and give a useful
1467 - Switch to a new buffer management algorithm, which tries to avoid
1468 reallocing and copying quite as much. In first tests it looks like
1469 it uses *more* memory on average, but less cpu.
1470 - Switch our internal buffers implementation to use a ring buffer,
1471 to hopefully improve performance for fast servers a lot.
1472 - Reenable the part of the code that tries to flush as soon as an
1473 OR outbuf has a full TLS record available. Perhaps this will make
1474 OR outbufs not grow as huge except in rare cases, thus saving lots
1475 of CPU time plus memory.
1476 - Improve performance for dirservers: stop re-parsing the whole
1477 directory every time you regenerate it.
1478 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1479 it much faster to look up a circuit for each relay cell.
1480 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1481 since they're eating our cpu on exit nodes.
1482 - Stop wasting time doing a case insensitive comparison for every
1483 dns name every time we do any lookup. Canonicalize the names to
1484 lowercase when you first see them.
1487 - Handle unavailable hidden services better. Handle slow or busy
1488 hidden services better.
1489 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1490 circ as necessary, if there are any completed ones lying around
1491 when we try to launch one.
1492 - Make hidden services try to establish a rendezvous for 30 seconds
1493 after fetching the descriptor, rather than for n (where n=3)
1494 attempts to build a circuit.
1495 - Adjust maximum skew and age for rendezvous descriptors: let skew
1496 be 48 hours rather than 90 minutes.
1497 - Reject malformed .onion addresses rather then passing them on as
1498 normal web requests.
1501 - More Tor controller support. See
1502 http://tor.eff.org/doc/control-spec.txt for all the new features,
1503 including signals to emulate unix signals from any platform;
1504 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1505 closestream; closecircuit; etc.
1506 - Encode hashed controller passwords in hex instead of base64,
1507 to make it easier to write controllers.
1508 - Revise control spec and implementation to allow all log messages to
1509 be sent to controller with their severities intact (suggested by
1510 Matt Edman). Disable debug-level logs while delivering a debug-level
1511 log to the controller, to prevent loop. Update TorControl to handle
1512 new log event types.
1514 o New config options/defaults:
1515 - Begin scrubbing sensitive strings from logs by default. Turn off
1516 the config option SafeLogging if you need to do debugging.
1517 - New exit policy: accept most low-numbered ports, rather than
1518 rejecting most low-numbered ports.
1519 - Put a note in the torrc about abuse potential with the default
1521 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1523 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1524 based on patch from Adam Langley (basic auth only).
1525 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1526 the fast servers that have been joining lately. (Clients are now
1527 willing to load balance over up to 2 MB of advertised bandwidth
1529 - New config option MaxAdvertisedBandwidth which lets you advertise
1530 a low bandwidthrate (to not attract as many circuits) while still
1531 allowing a higher bandwidthrate in reality.
1532 - Require BandwidthRate to be at least 20kB/s for servers.
1533 - Add a NoPublish config option, so you can be a server (e.g. for
1534 testing running Tor servers in other Tor networks) without
1535 publishing your descriptor to the primary dirservers.
1536 - Add a new AddressMap config directive to rewrite incoming socks
1537 addresses. This lets you, for example, declare an implicit
1538 required exit node for certain sites.
1539 - Add a new TrackHostExits config directive to trigger addressmaps
1540 for certain incoming socks addresses -- for sites that break when
1541 your exit keeps changing (based on patch from Mike Perry).
1542 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1543 which describes how often we retry making new circuits if current
1544 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1545 how long we're willing to make use of an already-dirty circuit.
1546 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1547 a config option "ShutdownWaitLength" (when using kill -INT on
1549 - Fix an edge case in parsing config options: if they say "--"
1550 on the commandline, it's not a config option (thanks weasel).
1551 - New config option DirAllowPrivateAddresses for authdirservers.
1552 Now by default they refuse router descriptors that have non-IP or
1553 private-IP addresses.
1554 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1555 smart" default value: low for servers and high for clients.
1556 - Some people were putting "Address " in their torrc, and they had
1557 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1558 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1559 LOCALSTATEDIR/tor instead.
1560 - Implement --verify-config command-line option to check if your torrc
1561 is valid without actually launching Tor.
1563 o Logging improvements:
1564 - When dirservers refuse a server descriptor, we now log its
1565 contactinfo, platform, and the poster's IP address.
1566 - Only warn once per nickname from add_nickname_list_to_smartlist()
1567 per failure, so an entrynode or exitnode choice that's down won't
1569 - When we're connecting to an OR and he's got a different nickname/key
1570 than we were expecting, only complain loudly if we're an OP or a
1571 dirserver. Complaining loudly to the OR admins just confuses them.
1572 - Whine at you if you're a server and you don't set your contactinfo.
1573 - Warn when exit policy implicitly allows local addresses.
1574 - Give a better warning when some other server advertises an
1575 ORPort that is actually an apache running ssl.
1576 - If we get an incredibly skewed timestamp from a dirserver mirror
1577 that isn't a verified OR, don't warn -- it's probably him that's
1579 - When a dirserver causes you to give a warn, mention which dirserver
1581 - Initialize libevent later in the startup process, so the logs are
1582 already established by the time we start logging libevent warns.
1583 - Use correct errno on win32 if libevent fails.
1584 - Check and warn about known-bad/slow libevent versions.
1585 - Stop warning about sigpipes in the logs. We're going to
1586 pretend that getting these occassionally is normal and fine.
1588 o New contrib scripts:
1589 - New experimental script tor/contrib/exitlist: a simple python
1590 script to parse directories and find Tor nodes that exit to listed
1592 - New experimental script tor/contrib/ExerciseServer.py (needs more
1593 work) that uses the controller interface to build circuits and
1594 fetch pages over them. This will help us bootstrap servers that
1595 have lots of capacity but haven't noticed it yet.
1596 - New experimental script tor/contrib/PathDemo.py (needs more work)
1597 that uses the controller interface to let you choose whole paths
1599 "<hostname>.<path,separated by dots>.<length of path>.path"
1600 - New contributed script "privoxy-tor-toggle" to toggle whether
1601 Privoxy uses Tor. Seems to be configured for Debian by default.
1602 - Have torctl.in/tor.sh.in check for location of su binary (needed
1606 - chdir() to your datadirectory at the *end* of the daemonize process,
1607 not the beginning. This was a problem because the first time you
1608 run tor, if your datadir isn't there, and you have runasdaemon set
1609 to 1, it will try to chdir to it before it tries to create it. Oops.
1610 - Fix several double-mark-for-close bugs, e.g. where we were finding
1611 a conn for a cell even if that conn is already marked for close.
1612 - Stop most cases of hanging up on a socks connection without sending
1614 - Fix a bug in the RPM package: set home directory for _tor to
1615 something more reasonable when first installing.
1616 - Stop putting nodename in the Platform string in server descriptors.
1617 It doesn't actually help, and it is confusing/upsetting some people.
1618 - When using preferred entry or exit nodes, ignore whether the
1619 circuit wants uptime or capacity. They asked for the nodes, they
1621 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1622 artificially capped at 500kB.
1623 - Cache local dns resolves correctly even when they're .exit
1625 - If we're hibernating and we get a SIGINT, exit immediately.
1626 - tor-resolve requests were ignoring .exit if there was a working circuit
1627 they could use instead.
1628 - Pay more attention to the ClientOnly config option.
1629 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1630 installer screens; and don't put stuff into StartupItems unless
1631 the user asks you to.
1634 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1635 rather than just rejecting it.
1636 - If our clock jumps forward by 100 seconds or more, assume something
1637 has gone wrong with our network and abandon all not-yet-used circs.
1638 - When an application is using socks5, give him the whole variety of
1639 potential socks5 responses (connect refused, host unreachable, etc),
1640 rather than just "success" or "failure".
1641 - A more sane version numbering system. See
1642 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1643 - Change version parsing logic: a version is "obsolete" if it is not
1644 recommended and (1) there is a newer recommended version in the
1645 same series, or (2) there are no recommended versions in the same
1646 series, but there are some recommended versions in a newer series.
1647 A version is "new" if it is newer than any recommended version in
1649 - Report HTTP reasons to client when getting a response from directory
1650 servers -- so you can actually know what went wrong.
1651 - Reject odd-looking addresses at the client (e.g. addresses that
1652 contain a colon), rather than having the server drop them because
1654 - Stop publishing socksport in the directory, since it's not
1655 actually meant to be public. For compatibility, publish a 0 there
1657 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1658 cookies to disk and doesn't log each web request to disk. (Thanks
1659 to Brett Carrington for pointing this out.)
1660 - Add OSX uninstall instructions. An actual uninstall script will
1662 - Add "opt hibernating 1" to server descriptor to make it clearer
1663 whether the server is hibernating.
1666 Changes in version 0.0.9.10 - 2005-06-16
1667 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1668 - Refuse relay cells that claim to have a length larger than the
1669 maximum allowed. This prevents a potential attack that could read
1670 arbitrary memory (e.g. keys) from an exit server's process
1674 Changes in version 0.0.9.9 - 2005-04-23
1675 o Bugfixes on 0.0.9.x:
1676 - If unofficial Tor clients connect and send weird TLS certs, our
1677 Tor server triggers an assert. This release contains a minimal
1678 backport from the broader fix that we put into 0.1.0.4-rc.
1681 Changes in version 0.0.9.8 - 2005-04-07
1682 o Bugfixes on 0.0.9.x:
1683 - We have a bug that I haven't found yet. Sometimes, very rarely,
1684 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1685 thinks of itself as idle. This meant that no new circuits ever got
1686 established. Here's a workaround to kill any cpuworker that's been
1687 busy for more than 100 seconds.
1690 Changes in version 0.0.9.7 - 2005-04-01
1691 o Bugfixes on 0.0.9.x:
1692 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1693 - Compare identity to identity, not to nickname, when extending to
1694 a router not already in the directory. This was preventing us from
1695 extending to unknown routers. Oops.
1696 - Make sure to create OS X Tor user in <500 range, so we aren't
1697 creating actual system users.
1698 - Note where connection-that-hasn't-sent-end was marked, and fix
1699 a few really loud instances of this harmless bug (it's fixed more
1703 Changes in version 0.0.9.6 - 2005-03-24
1704 o Bugfixes on 0.0.9.x (crashes and asserts):
1705 - Add new end stream reasons to maintainance branch. Fix bug where
1706 reason (8) could trigger an assert. Prevent bug from recurring.
1707 - Apparently win32 stat wants paths to not end with a slash.
1708 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1709 blowing away the circuit that conn->cpath_layer points to, then
1710 checking to see if the circ is well-formed. Backport check to make
1711 sure we dont use the cpath on a closed connection.
1712 - Prevent circuit_resume_edge_reading_helper() from trying to package
1713 inbufs for marked-for-close streams.
1714 - Don't crash on hup if your options->address has become unresolvable.
1715 - Some systems (like OS X) sometimes accept() a connection and tell
1716 you the remote host is 0.0.0.0:0. If this happens, due to some
1717 other mis-features, we get confused; so refuse the conn for now.
1719 o Bugfixes on 0.0.9.x (other):
1720 - Fix harmless but scary "Unrecognized content encoding" warn message.
1721 - Add new stream error reason: TORPROTOCOL reason means "you are not
1722 speaking a version of Tor I understand; say bye-bye to your stream."
1723 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1724 into the future, now that we are more tolerant of skew. This
1725 resolves a bug where a Tor server would refuse to cache a directory
1726 because all the directories it gets are too far in the future;
1727 yet the Tor server never logs any complaints about clock skew.
1728 - Mac packaging magic: make man pages useable, and do not overwrite
1729 existing torrc files.
1730 - Make OS X log happily to /var/log/tor/tor.log
1733 Changes in version 0.0.9.5 - 2005-02-22
1734 o Bugfixes on 0.0.9.x:
1735 - Fix an assert race at exit nodes when resolve requests fail.
1736 - Stop picking unverified dir mirrors--it only leads to misery.
1737 - Patch from Matt Edman to make NT services work better. Service
1738 support is still not compiled into the executable by default.
1739 - Patch from Dmitri Bely so the Tor service runs better under
1740 the win32 SYSTEM account.
1741 - Make tor-resolve actually work (?) on Win32.
1742 - Fix a sign bug when getrlimit claims to have 4+ billion
1743 file descriptors available.
1744 - Stop refusing to start when bandwidthburst == bandwidthrate.
1745 - When create cells have been on the onion queue more than five
1746 seconds, just send back a destroy and take them off the list.
1749 Changes in version 0.0.9.4 - 2005-02-03
1750 o Bugfixes on 0.0.9:
1751 - Fix an assert bug that took down most of our servers: when
1752 a server claims to have 1 GB of bandwidthburst, don't
1754 - Don't crash as badly if we have spawned the max allowed number
1755 of dnsworkers, or we're out of file descriptors.
1756 - Block more file-sharing ports in the default exit policy.
1757 - MaxConn is now automatically set to the hard limit of max
1758 file descriptors we're allowed (ulimit -n), minus a few for
1760 - Give a clearer message when servers need to raise their
1761 ulimit -n when they start running out of file descriptors.
1762 - SGI Compatibility patches from Jan Schaumann.
1763 - Tolerate a corrupt cached directory better.
1764 - When a dirserver hasn't approved your server, list which one.
1765 - Go into soft hibernation after 95% of the bandwidth is used,
1766 not 99%. This is especially important for daily hibernators who
1767 have a small accounting max. Hopefully it will result in fewer
1768 cut connections when the hard hibernation starts.
1769 - Load-balance better when using servers that claim more than
1770 800kB/s of capacity.
1771 - Make NT services work (experimental, only used if compiled in).
1774 Changes in version 0.0.9.3 - 2005-01-21
1775 o Bugfixes on 0.0.9:
1776 - Backport the cpu use fixes from main branch, so busy servers won't
1777 need as much processor time.
1778 - Work better when we go offline and then come back, or when we
1779 run Tor at boot before the network is up. We do this by
1780 optimistically trying to fetch a new directory whenever an
1781 application request comes in and we think we're offline -- the
1782 human is hopefully a good measure of when the network is back.
1783 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1784 long as you keep using them; actually publish hidserv descriptors
1785 shortly after they change, rather than waiting 20-40 minutes.
1786 - Enable Mac startup script by default.
1787 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1788 - When you update AllowUnverifiedNodes or FirewallPorts via the
1789 controller's setconf feature, we were always appending, never
1791 - When you update HiddenServiceDir via setconf, it was screwing up
1792 the order of reading the lines, making it fail.
1793 - Do not rewrite a cached directory back to the cache; otherwise we
1794 will think it is recent and not fetch a newer one on startup.
1795 - Workaround for webservers that lie about Content-Encoding: Tor
1796 now tries to autodetect compressed directories and compression
1797 itself. This lets us Proxypass dir fetches through apache.
1800 Changes in version 0.0.9.2 - 2005-01-04
1801 o Bugfixes on 0.0.9 (crashes and asserts):
1802 - Fix an assert on startup when the disk is full and you're logging
1804 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
1805 style address, then we'd crash.
1806 - Fix an assert trigger when the running-routers string we get from
1807 a dirserver is broken.
1808 - Make worker threads start and run on win32. Now win32 servers
1810 - Bandaid (not actually fix, but now it doesn't crash) an assert
1811 where the dns worker dies mysteriously and the main Tor process
1812 doesn't remember anything about the address it was resolving.
1814 o Bugfixes on 0.0.9 (Win32):
1815 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
1816 name out of the warning/assert messages.
1817 - Fix a superficial "unhandled error on read" bug on win32.
1818 - The win32 installer no longer requires a click-through for our
1819 license, since our Free Software license grants rights but does not
1821 - Win32: When connecting to a dirserver fails, try another one
1822 immediately. (This was already working for non-win32 Tors.)
1823 - Stop trying to parse $HOME on win32 when hunting for default
1825 - Make tor-resolve.c work on win32 by calling network_init().
1827 o Bugfixes on 0.0.9 (other):
1828 - Make 0.0.9.x build on Solaris again.
1829 - Due to a fencepost error, we were blowing away the \n when reporting
1830 confvalue items in the controller. So asking for multiple config
1831 values at once couldn't work.
1832 - When listing circuits that are pending on an opening OR connection,
1833 if we're an OR we were listing circuits that *end* at us as
1834 being pending on every listener, dns/cpu worker, etc. Stop that.
1835 - Dirservers were failing to create 'running-routers' or 'directory'
1836 strings if we had more than some threshold of routers. Fix them so
1837 they can handle any number of routers.
1838 - Fix a superficial "Duplicate mark for close" bug.
1839 - Stop checking for clock skew for OR connections, even for servers.
1840 - Fix a fencepost error that was chopping off the last letter of any
1841 nickname that is the maximum allowed nickname length.
1842 - Update URLs in log messages so they point to the new website.
1843 - Fix a potential problem in mangling server private keys while
1844 writing to disk (not triggered yet, as far as we know).
1845 - Include the licenses for other free software we include in Tor,
1846 now that we're shipping binary distributions more regularly.
1849 Changes in version 0.0.9.1 - 2004-12-15
1850 o Bugfixes on 0.0.9:
1851 - Make hibernation actually work.
1852 - Make HashedControlPassword config option work.
1853 - When we're reporting event circuit status to a controller,
1854 don't use the stream status code.
1857 Changes in version 0.0.9 - 2004-12-12
1858 o Bugfixes on 0.0.8.1 (Crashes and asserts):
1859 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
1860 write() call will fail and we handle it there.
1861 - When we run out of disk space, or other log writing error, don't
1862 crash. Just stop logging to that log and continue.
1863 - Fix isspace() and friends so they still make Solaris happy
1864 but also so they don't trigger asserts on win32.
1865 - Fix assert failure on malformed socks4a requests.
1866 - Fix an assert bug where a hidden service provider would fail if
1867 the first hop of his rendezvous circuit was down.
1868 - Better handling of size_t vs int, so we're more robust on 64
1871 o Bugfixes on 0.0.8.1 (Win32):
1872 - Make windows sockets actually non-blocking (oops), and handle
1873 win32 socket errors better.
1874 - Fix parse_iso_time on platforms without strptime (eg win32).
1875 - win32: when being multithreaded, leave parent fdarray open.
1876 - Better handling of winsock includes on non-MSV win32 compilers.
1877 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
1879 - Make unit tests work on win32.
1881 o Bugfixes on 0.0.8.1 (Path selection and streams):
1882 - Calculate timeout for waiting for a connected cell from the time
1883 we sent the begin cell, not from the time the stream started. If
1884 it took a long time to establish the circuit, we would time out
1885 right after sending the begin cell.
1886 - Fix router_compare_addr_to_addr_policy: it was not treating a port
1887 of * as always matching, so we were picking reject *:* nodes as
1888 exit nodes too. Oops.
1889 - When read() failed on a stream, we would close it without sending
1890 back an end. So 'connection refused' would simply be ignored and
1891 the user would get no response.
1892 - Stop a sigpipe: when an 'end' cell races with eof from the app,
1893 we shouldn't hold-open-until-flush if the eof arrived first.
1894 - Let resolve conns retry/expire also, rather than sticking around
1896 - Fix more dns related bugs: send back resolve_failed and end cells
1897 more reliably when the resolve fails, rather than closing the
1898 circuit and then trying to send the cell. Also attach dummy resolve
1899 connections to a circuit *before* calling dns_resolve(), to fix
1900 a bug where cached answers would never be sent in RESOLVED cells.
1902 o Bugfixes on 0.0.8.1 (Circuits):
1903 - Finally fix a bug that's been plaguing us for a year:
1904 With high load, circuit package window was reaching 0. Whenever
1905 we got a circuit-level sendme, we were reading a lot on each
1906 socket, but only writing out a bit. So we would eventually reach
1907 eof. This would be noticed and acted on even when there were still
1908 bytes sitting in the inbuf.
1909 - Use identity comparison, not nickname comparison, to choose which
1910 half of circuit-ID-space each side gets to use. This is needed
1911 because sometimes we think of a router as a nickname, and sometimes
1912 as a hex ID, and we can't predict what the other side will do.
1914 o Bugfixes on 0.0.8.1 (Other):
1915 - Fix a whole slew of memory leaks.
1916 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
1917 - If we are using select, make sure we stay within FD_SETSIZE.
1918 - When poll() is interrupted, we shouldn't believe the revents values.
1919 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
1920 and smartlist_len, which are two major profiling offenders.
1921 - If do_hup fails, actually notice.
1922 - Flush the log file descriptor after we print "Tor opening log file",
1923 so we don't see those messages days later.
1924 - Hidden service operators now correctly handle version 1 style
1925 INTRODUCE1 cells (nobody generates them still, so not a critical
1927 - Handle more errnos from accept() without closing the listener.
1928 Some OpenBSD machines were closing their listeners because
1929 they ran out of file descriptors.
1930 - Some people had wrapped their tor client/server in a script
1931 that would restart it whenever it died. This did not play well
1932 with our "shut down if your version is obsolete" code. Now people
1933 don't fetch a new directory if their local cached version is
1935 - Make our autogen.sh work on ksh as well as bash.
1936 - Better torrc example lines for dirbindaddress and orbindaddress.
1937 - Improved bounds checking on parsed ints (e.g. config options and
1938 the ones we find in directories.)
1939 - Stop using separate defaults for no-config-file and
1940 empty-config-file. Now you have to explicitly turn off SocksPort,
1941 if you don't want it open.
1942 - We were starting to daemonize before we opened our logs, so if
1943 there were any problems opening logs, we would complain to stderr,
1944 which wouldn't work, and then mysteriously exit.
1945 - If a verified OR connects to us before he's uploaded his descriptor,
1946 or we verify him and hup but he still has the original TLS
1947 connection, then conn->nickname is still set like he's unverified.
1949 o Code security improvements, inspired by Ilja:
1950 - tor_snprintf wrapper over snprintf with consistent (though not C99)
1952 - Replace sprintf with tor_snprintf. (I think they were all safe, but
1954 - Replace strcpy/strncpy with strlcpy in more places.
1955 - Avoid strcat; use tor_snprintf or strlcat instead.
1957 o Features (circuits and streams):
1958 - New circuit building strategy: keep a list of ports that we've
1959 used in the past 6 hours, and always try to have 2 circuits open
1960 or on the way that will handle each such port. Seed us with port
1961 80 so web users won't complain that Tor is "slow to start up".
1962 - Make kill -USR1 dump more useful stats about circuits.
1963 - When warning about retrying or giving up, print the address, so
1964 the user knows which one it's talking about.
1965 - If you haven't used a clean circuit in an hour, throw it away,
1966 just to be on the safe side. (This means after 6 hours a totally
1967 unused Tor client will have no circuits open.)
1968 - Support "foo.nickname.exit" addresses, to let Alice request the
1969 address "foo" as viewed by exit node "nickname". Based on a patch
1971 - If your requested entry or exit node has advertised bandwidth 0,
1973 - Be more greedy about filling up relay cells -- we try reading again
1974 once we've processed the stuff we read, in case enough has arrived
1975 to fill the last cell completely.
1976 - Refuse application socks connections to port 0.
1977 - Use only 0.0.9pre1 and later servers for resolve cells.
1979 o Features (bandwidth):
1980 - Hibernation: New config option "AccountingMax" lets you
1981 set how many bytes per month (in each direction) you want to
1982 allow your server to consume. Rather than spreading those
1983 bytes out evenly over the month, we instead hibernate for some
1984 of the month and pop up at a deterministic time, work until
1985 the bytes are consumed, then hibernate again. Config option
1986 "MonthlyAccountingStart" lets you specify which day of the month
1987 your billing cycle starts on.
1988 - Implement weekly/monthly/daily accounting: now you specify your
1989 hibernation properties by
1990 AccountingMax N bytes|KB|MB|GB|TB
1991 AccountingStart day|week|month [day] HH:MM
1992 Defaults to "month 1 0:00".
1993 - Let bandwidth and interval config options be specified as 5 bytes,
1994 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
1996 o Features (directories):
1997 - New "router-status" line in directory, to better bind each verified
1998 nickname to its identity key.
1999 - Clients can ask dirservers for /dir.z to get a compressed version
2000 of the directory. Only works for servers running 0.0.9, of course.
2001 - Make clients cache directories and use them to seed their router
2002 lists at startup. This means clients have a datadir again.
2003 - Respond to content-encoding headers by trying to uncompress as
2005 - Clients and servers now fetch running-routers; cache
2006 running-routers; compress running-routers; serve compressed
2008 - Make moria2 advertise a dirport of 80, so people behind firewalls
2009 will be able to get a directory.
2010 - Http proxy support
2011 - Dirservers translate requests for http://%s:%d/x to /x
2012 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
2013 be routed through this host.
2014 - Clients ask for /tor/x rather than /x for new enough dirservers.
2015 This way we can one day coexist peacefully with apache.
2016 - Clients specify a "Host: %s%d" http header, to be compatible
2017 with more proxies, and so running squid on an exit node can work.
2018 - Protect dirservers from overzealous descriptor uploading -- wait
2019 10 seconds after directory gets dirty, before regenerating.
2021 o Features (packages and install):
2022 - Add NSI installer contributed by J Doe.
2023 - Apply NT service patch from Osamu Fujino. Still needs more work.
2024 - Commit VC6 and VC7 workspace/project files.
2025 - Commit a tor.spec for making RPM files, with help from jbash.
2026 - Add contrib/torctl.in contributed by Glenn Fink.
2027 - Make expand_filename handle ~ and ~username.
2028 - Use autoconf to enable largefile support where necessary. Use
2029 ftello where available, since ftell can fail at 2GB.
2030 - Ship src/win32/ in the tarball, so people can use it to build.
2031 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
2034 o Features (ui controller):
2035 - Control interface: a separate program can now talk to your
2036 client/server over a socket, and get/set config options, receive
2037 notifications of circuits and streams starting/finishing/dying,
2038 bandwidth used, etc. The next step is to get some GUIs working.
2039 Let us know if you want to help out. See doc/control-spec.txt .
2040 - Ship a contrib/tor-control.py as an example script to interact
2041 with the control port.
2042 - "tor --hash-password zzyxz" will output a salted password for
2043 use in authenticating to the control interface.
2044 - Implement the control-spec's SAVECONF command, to write your
2045 configuration to torrc.
2046 - Get cookie authentication for the controller closer to working.
2047 - When set_conf changes our server descriptor, upload a new copy.
2048 But don't upload it too often if there are frequent changes.
2050 o Features (config and command-line):
2051 - Deprecate unofficial config option abbreviations, and abbreviations
2052 not on the command line.
2053 - Configuration infrastructure support for warning on obsolete
2055 - Give a slightly more useful output for "tor -h".
2056 - Break DirFetchPostPeriod into:
2057 - DirFetchPeriod for fetching full directory,
2058 - StatusFetchPeriod for fetching running-routers,
2059 - DirPostPeriod for posting server descriptor,
2060 - RendPostPeriod for posting hidden service descriptors.
2061 - New log format in config:
2062 "Log minsev[-maxsev] stdout|stderr|syslog" or
2063 "Log minsev[-maxsev] file /var/foo"
2064 - DirPolicy config option, to let people reject incoming addresses
2065 from their dirserver.
2066 - "tor --list-fingerprint" will list your identity key fingerprint
2068 - Make tor --version --version dump the cvs Id of every file.
2069 - New 'MyFamily nick1,...' config option for a server to
2070 specify other servers that shouldn't be used in the same circuit
2071 with it. Only believed if nick1 also specifies us.
2072 - New 'NodeFamily nick1,nick2,...' config option for a client to
2073 specify nodes that it doesn't want to use in the same circuit.
2074 - New 'Redirectexit pattern address:port' config option for a
2075 server to redirect exit connections, e.g. to a local squid.
2076 - Add "pass" target for RedirectExit, to make it easier to break
2077 out of a sequence of RedirectExit rules.
2078 - Make the dirservers file obsolete.
2079 - Include a dir-signing-key token in directories to tell the
2080 parsing entity which key is being used to sign.
2081 - Remove the built-in bulky default dirservers string.
2082 - New config option "Dirserver %s:%d [fingerprint]", which can be
2083 repeated as many times as needed. If no dirservers specified,
2084 default to moria1,moria2,tor26.
2085 - Make 'Routerfile' config option obsolete.
2086 - Discourage people from setting their dirfetchpostperiod more often
2087 than once per minute.
2090 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
2091 get back to normal.)
2092 - Accept *:706 (silc) in default exit policy.
2093 - Implement new versioning format for post 0.1.
2094 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
2095 log more informatively.
2096 - Check clock skew for verified servers, but allow unverified
2097 servers and clients to have any clock skew.
2098 - Make sure the hidden service descriptors are at a random offset
2099 from each other, to hinder linkability.
2100 - Clients now generate a TLS cert too, in preparation for having
2101 them act more like real nodes.
2102 - Add a pure-C tor-resolve implementation.
2103 - Use getrlimit and friends to ensure we can reach MaxConn (currently
2104 1024) file descriptors.
2105 - Raise the max dns workers from 50 to 100.
2108 Changes in version 0.0.8.1 - 2004-10-13
2110 - Fix a seg fault that can be triggered remotely for Tor
2111 clients/servers with an open dirport.
2112 - Fix a rare assert trigger, where routerinfos for entries in
2113 our cpath would expire while we're building the path.
2114 - Fix a bug in OutboundBindAddress so it (hopefully) works.
2115 - Fix a rare seg fault for people running hidden services on
2116 intermittent connections.
2117 - Fix a bug in parsing opt keywords with objects.
2118 - Fix a stale pointer assert bug when a stream detaches and
2120 - Fix a string format vulnerability (probably not exploitable)
2121 in reporting stats locally.
2122 - Fix an assert trigger: sometimes launching circuits can fail
2123 immediately, e.g. because too many circuits have failed recently.
2124 - Fix a compile warning on 64 bit platforms.
2127 Changes in version 0.0.8 - 2004-08-25
2129 - Made our unit tests compile again on OpenBSD 3.5, and tor
2130 itself compile again on OpenBSD on a sparc64.
2131 - We were neglecting milliseconds when logging on win32, so
2132 everything appeared to happen at the beginning of each second.
2133 - Check directory signature _before_ you decide whether you're
2134 you're running an obsolete version and should exit.
2135 - Check directory signature _before_ you parse the running-routers
2136 list to decide who's running.
2137 - Check return value of fclose while writing to disk, so we don't
2138 end up with broken files when servers run out of disk space.
2139 - Port it to SunOS 5.9 / Athena
2140 - Fix two bugs in saving onion keys to disk when rotating, so
2141 hopefully we'll get fewer people using old onion keys.
2142 - Remove our mostly unused -- and broken -- hex_encode()
2143 function. Use base16_encode() instead. (Thanks to Timo Lindfors
2144 for pointing out this bug.)
2145 - Only pick and establish intro points after we've gotten a
2147 - Fix assert triggers: if the other side returns an address 0.0.0.0,
2148 don't put it into the client dns cache.
2149 - If a begin failed due to exit policy, but we believe the IP
2150 address should have been allowed, switch that router to exitpolicy
2151 reject *:* until we get our next directory.
2154 - 'Extend' relay cell payloads now include the digest of the
2155 intended next hop's identity key. Now we can verify that we're
2156 extending to the right router, and also extend to routers we
2157 hadn't heard of before.
2160 - Tor nodes can now act as relays (with an advertised ORPort)
2161 without being manually verified by the dirserver operators.
2162 - Uploaded descriptors of unverified routers are now accepted
2163 by the dirservers, and included in the directory.
2164 - Verified routers are listed by nickname in the running-routers
2165 list; unverified routers are listed as "$<fingerprint>".
2166 - We now use hash-of-identity-key in most places rather than
2167 nickname or addr:port, for improved security/flexibility.
2168 - AllowUnverifiedNodes config option to let circuits choose no-name
2169 routers in entry,middle,exit,introduction,rendezvous positions.
2170 Allow middle and rendezvous positions by default.
2171 - When picking unverified routers, skip those with low uptime and/or
2172 low bandwidth, depending on what properties you care about.
2173 - ClientOnly option for nodes that never want to become servers.
2174 - Directory caching.
2175 - "AuthoritativeDir 1" option for the official dirservers.
2176 - Now other nodes (clients and servers) will cache the latest
2177 directory they've pulled down.
2178 - They can enable their DirPort to serve it to others.
2179 - Clients will pull down a directory from any node with an open
2180 DirPort, and check the signature/timestamp correctly.
2181 - Authoritative dirservers now fetch directories from other
2182 authdirservers, to stay better synced.
2183 - Running-routers list tells who's down also, along with noting
2184 if they're verified (listed by nickname) or unverified (listed
2186 - Allow dirservers to serve running-router list separately.
2187 This isn't used yet.
2188 - You can now fetch $DIRURL/running-routers to get just the
2189 running-routers line, not the whole descriptor list. (But
2190 clients don't use this yet.)
2191 - Clients choose nodes proportional to advertised bandwidth.
2192 - Clients avoid using nodes with low uptime as introduction points.
2193 - Handle servers with dynamic IP addresses: don't just replace
2194 options->Address with the resolved one at startup, and
2195 detect our address right before we make a routerinfo each time.
2196 - 'FascistFirewall' option to pick dirservers and ORs on specific
2197 ports; plus 'FirewallPorts' config option to tell FascistFirewall
2198 which ports are open. (Defaults to 80,443)
2199 - Try other dirservers immediately if the one you try is down. This
2200 should tolerate down dirservers better now.
2201 - ORs connect-on-demand to other ORs
2202 - If you get an extend cell to an OR you're not connected to,
2203 connect, handshake, and forward the create cell.
2204 - The authoritative dirservers stay connected to everybody,
2205 and everybody stays connected to 0.0.7 servers, but otherwise
2206 clients/servers expire unused connections after 5 minutes.
2207 - When servers get a sigint, they delay 30 seconds (refusing new
2208 connections) then exit. A second sigint causes immediate exit.
2209 - File and name management:
2210 - Look for .torrc if no CONFDIR "torrc" is found.
2211 - If no datadir is defined, then choose, make, and secure ~/.tor
2213 - If torrc not found, exitpolicy reject *:*.
2214 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
2215 - If no nickname is defined, derive default from hostname.
2216 - Rename secret key files, e.g. identity.key -> secret_id_key,
2217 to discourage people from mailing their identity key to tor-ops.
2218 - Refuse to build a circuit before the directory has arrived --
2219 it won't work anyway, since you won't know the right onion keys
2221 - Parse tor version numbers so we can do an is-newer-than check
2222 rather than an is-in-the-list check.
2223 - New socks command 'resolve', to let us shim gethostbyname()
2225 - A 'tor_resolve' script to access the socks resolve functionality.
2226 - A new socks-extensions.txt doc file to describe our
2227 interpretation and extensions to the socks protocols.
2228 - Add a ContactInfo option, which gets published in descriptor.
2229 - Write tor version at the top of each log file
2230 - New docs in the tarball:
2232 - Document that you should proxy your SSL traffic too.
2233 - Log a warning if the user uses an unsafe socks variant, so people
2234 are more likely to learn about privoxy or socat.
2235 - Log a warning if you're running an unverified server, to let you
2236 know you might want to get it verified.
2237 - Change the default exit policy to reject the default edonkey,
2238 kazaa, gnutella ports.
2239 - Add replace_file() to util.[ch] to handle win32's rename().
2240 - Publish OR uptime in descriptor (and thus in directory) too.
2241 - Remember used bandwidth (both in and out), and publish 15-minute
2242 snapshots for the past day into our descriptor.
2243 - Be more aggressive about trying to make circuits when the network
2244 has changed (e.g. when you unsuspend your laptop).
2245 - Check for time skew on http headers; report date in response to
2247 - If the entrynode config line has only one node, don't pick it as
2249 - Add strict{entry|exit}nodes config options. If set to 1, then
2250 we refuse to build circuits that don't include the specified entry
2252 - OutboundBindAddress config option, to bind to a specific
2253 IP address for outgoing connect()s.
2254 - End truncated log entries (e.g. directories) with "[truncated]".
2257 Changes in version 0.0.7.3 - 2004-08-12
2258 o Stop dnsworkers from triggering an assert failure when you
2259 ask them to resolve the host "".
2262 Changes in version 0.0.7.2 - 2004-07-07
2263 o A better fix for the 0.0.0.0 problem, that will hopefully
2264 eliminate the remaining related assertion failures.
2267 Changes in version 0.0.7.1 - 2004-07-04
2268 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
2269 since internally we use 0.0.0.0 to signify "not yet resolved".
2272 Changes in version 0.0.7 - 2004-06-07
2273 o Fixes for crashes and other obnoxious bugs:
2274 - Fix an epipe bug: sometimes when directory connections failed
2275 to connect, we would give them a chance to flush before closing
2277 - When we detached from a circuit because of resolvefailed, we
2278 would immediately try the same circuit twice more, and then
2279 give up on the resolve thinking we'd tried three different
2281 - Limit the number of intro circuits we'll attempt to build for a
2282 hidden service per 15-minute period.
2283 - Check recommended-software string *early*, before actually parsing
2284 the directory. Thus we can detect an obsolete version and exit,
2285 even if the new directory format doesn't parse.
2286 o Fixes for security bugs:
2287 - Remember which nodes are dirservers when you startup, and if a
2288 random OR enables his dirport, don't automatically assume he's
2289 a trusted dirserver.
2291 - Directory connections were asking the wrong poll socket to
2292 start writing, and not asking themselves to start writing.
2293 - When we detached from a circuit because we sent a begin but
2294 didn't get a connected, we would use it again the first time;
2295 but after that we would correctly switch to a different one.
2296 - Stop warning when the first onion decrypt attempt fails; they
2297 will sometimes legitimately fail now that we rotate keys.
2298 - Override unaligned-access-ok check when $host_cpu is ia64 or
2299 arm. Apparently they allow it but the kernel whines.
2300 - Dirservers try to reconnect periodically too, in case connections
2302 - Fix some memory leaks in directory servers.
2303 - Allow backslash in Win32 filenames.
2304 - Made Tor build complain-free on FreeBSD, hopefully without
2305 breaking other BSD builds. We'll see.
2306 - Check directory signatures based on name of signer, not on whom
2307 we got the directory from. This will let us cache directories more
2309 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
2312 - Doxygen markup on all functions and global variables.
2313 - Make directory functions update routerlist, not replace it. So
2314 now directory disagreements are not so critical a problem.
2315 - Remove the upper limit on number of descriptors in a dirserver's
2316 directory (not that we were anywhere close).
2317 - Allow multiple logfiles at different severity ranges.
2318 - Allow *BindAddress to specify ":port" rather than setting *Port
2319 separately. Allow multiple instances of each BindAddress config
2320 option, so you can bind to multiple interfaces if you want.
2321 - Allow multiple exit policy lines, which are processed in order.
2322 Now we don't need that huge line with all the commas in it.
2323 - Enable accept/reject policies on SOCKS connections, so you can bind
2324 to 0.0.0.0 but still control who can use your OP.
2325 - Updated the man page to reflect these features.
2328 Changes in version 0.0.6.2 - 2004-05-16
2329 o Our integrity-checking digest was checking only the most recent cell,
2330 not the previous cells like we'd thought.
2331 Thanks to Stefan Mark for finding the flaw!
2334 Changes in version 0.0.6.1 - 2004-05-06
2335 o Fix two bugs in our AES counter-mode implementation (this affected
2336 onion-level stream encryption, but not TLS-level). It turns
2337 out we were doing something much more akin to a 16-character
2338 polyalphabetic cipher. Oops.
2339 Thanks to Stefan Mark for finding the flaw!
2340 o Retire moria3 as a directory server, and add tor26 as a directory
2344 Changes in version 0.0.6 - 2004-05-02
2346 - Hidden services and rendezvous points are implemented. Go to
2347 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2348 hidden services. (This only works via a socks4a proxy such as
2349 Privoxy, and currently it's quite slow.)
2350 - We now rotate link (tls context) keys and onion keys.
2351 - CREATE cells now include oaep padding, so you can tell
2352 if you decrypted them correctly.
2353 - Retry stream correctly when we fail to connect because of
2354 exit-policy-reject (should try another) or can't-resolve-address.
2355 - When we hup a dirserver and we've *removed* a server from the
2356 approved-routers list, now we remove that server from the
2357 in-memory directories too.
2358 - Add bandwidthburst to server descriptor.
2359 - Directories now say which dirserver signed them.
2360 - Use a tor_assert macro that logs failed assertions too.
2361 - Since we don't support truncateds much, don't bother sending them;
2362 just close the circ.
2363 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2364 - Better debugging for tls errors
2365 - Set Content-Type on the directory and hidserv descriptor.
2366 - Remove IVs from cipher code, since AES-ctr has none.
2368 - Fix an assert trigger for exit nodes that's been plaguing us since
2369 the days of 0.0.2prexx (thanks weasel!)
2370 - Fix a bug where we were closing tls connections intermittently.
2371 It turns out openssl keeps its errors around -- so if an error
2372 happens, and you don't ask about it, and then another openssl
2373 operation happens and succeeds, and you ask if there was an error,
2374 it tells you about the first error.
2375 - Fix a bug that's been lurking since 27 may 03 (!)
2376 When passing back a destroy cell, we would use the wrong circ id.
2377 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2378 - Some versions of openssl have an SSL_pending function that erroneously
2379 returns bytes when there is a non-application record pending.
2380 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2381 o We were using an array of length zero in a few places.
2382 o Win32's gethostbyname can't resolve an IP to an IP.
2383 o Win32's close can't close a socket.
2384 o Handle windows socket errors correctly.
2386 - check for <sys/limits.h> so we build on FreeBSD again, and
2387 <machine/limits.h> for NetBSD.
2390 Changes in version 0.0.5 - 2004-03-30
2391 o Install torrc as torrc.sample -- we no longer clobber your
2393 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2394 o Only build circuits after we've fetched the directory: clients were
2395 using only the directory servers before they'd fetched a directory.
2396 This also means longer startup time; so it goes.
2397 o Fix an assert trigger where an OP would fail to handshake, and we'd
2398 expect it to have a nickname.
2399 o Work around a tsocks bug: do a socks reject when AP connection dies
2400 early, else tsocks goes into an infinite loop.
2401 o Hold socks connection open until reply is flushed (if possible)
2402 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2403 the dns farm to do it.
2404 o Fix c99 aliasing warnings in rephist.c
2405 o Don't include server descriptors that are older than 24 hours in the
2407 o Give socks 'reject' replies their whole 15s to attempt to flush,
2408 rather than seeing the 60s timeout and assuming the flush had failed.
2409 o Clean automake droppings from the cvs repository
2410 o Add in a 'notice' log level for things the operator should hear
2411 but that aren't warnings
2414 Changes in version 0.0.4 - 2004-03-26
2415 o When connecting to a dirserver or OR and the network is down,
2419 Changes in version 0.0.3 - 2004-03-26
2420 o Warn and fail if server chose a nickname with illegal characters
2421 o Port to Solaris and Sparc:
2422 - include missing header fcntl.h
2423 - have autoconf find -lsocket -lnsl automatically
2424 - deal with hardware word alignment
2425 - make uname() work (solaris has a different return convention)
2426 - switch from using signal() to sigaction()
2427 o Preliminary work on reputation system:
2428 - Keep statistics on success/fail of connect attempts; they're published
2429 by kill -USR1 currently.
2430 - Add a RunTesting option to try to learn link state by creating test
2431 circuits, even when SocksPort is off.
2432 - Remove unused open circuits when there are too many.
2435 Changes in version 0.0.2 - 2004-03-19
2436 - Include strlcpy and strlcat for safer string ops
2437 - define INADDR_NONE so we compile (but still not run) on solaris
2440 Changes in version 0.0.2pre27 - 2004-03-14
2442 - Allow internal tor networks (we were rejecting internal IPs,
2443 now we allow them if they're set explicitly).
2444 - And fix a few endian issues.
2447 Changes in version 0.0.2pre26 - 2004-03-14
2449 - If a stream times out after 15s without a connected cell, don't
2450 try that circuit again: try a new one.
2451 - Retry streams at most 4 times. Then give up.
2452 - When a dirserver gets a descriptor from an unknown router, it
2453 logs its fingerprint (so the dirserver operator can choose to
2454 accept it even without mail from the server operator).
2455 - Inform unapproved servers when we reject their descriptors.
2456 - Make tor build on Windows again. It works as a client, who knows
2458 - Clearer instructions in the torrc for how to set up a server.
2459 - Be more efficient about reading fd's when our global token bucket
2460 (used for rate limiting) becomes empty.
2462 - Stop asserting that computers always go forward in time. It's
2464 - When we sent a cell (e.g. destroy) and then marked an OR connection
2465 expired, we might close it before finishing a flush if the other
2466 side isn't reading right then.
2467 - Don't allow dirservers to start if they haven't defined
2469 - We were caching transient dns failures. Oops.
2470 - Prevent servers from publishing an internal IP as their address.
2471 - Address a strcat vulnerability in circuit.c
2474 Changes in version 0.0.2pre25 - 2004-03-04
2476 - Put the OR's IP in its router descriptor, not its fqdn. That way
2477 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2480 - If the user typed in an address that didn't resolve, the server
2484 Changes in version 0.0.2pre24 - 2004-03-03
2486 - Fix an assertion failure in dns.c, where we were trying to dequeue
2487 a pending dns resolve even if it wasn't pending
2488 - Fix a spurious socks5 warning about still trying to write after the
2489 connection is finished.
2490 - Hold certain marked_for_close connections open until they're finished
2491 flushing, rather than losing bytes by closing them too early.
2492 - Correctly report the reason for ending a stream
2493 - Remove some duplicate calls to connection_mark_for_close
2494 - Put switch_id and start_daemon earlier in the boot sequence, so it
2495 will actually try to chdir() to options.DataDirectory
2496 - Make 'make test' exit(1) if a test fails; fix some unit tests
2497 - Make tor fail when you use a config option it doesn't know about,
2498 rather than warn and continue.
2499 - Make --version work
2500 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2503 Changes in version 0.0.2pre23 - 2004-02-29
2505 - Print a statement when the first circ is finished, so the user
2507 - If a relay cell is unrecognized at the end of the circuit,
2508 send back a destroy. (So attacks to mutate cells are more
2510 - New config option 'excludenodes' to avoid certain nodes for circuits.
2511 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2512 so you can collect coredumps there.
2514 - Fix a bug in tls flushing where sometimes data got wedged and
2515 didn't flush until more data got sent. Hopefully this bug was
2516 a big factor in the random delays we were seeing.
2517 - Make 'connected' cells include the resolved IP, so the client
2518 dns cache actually gets populated.
2519 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2520 - When we time-out on a stream and detach from the circuit, send an
2521 end cell down it first.
2522 - Only warn about an unknown router (in exitnodes, entrynodes,
2523 excludenodes) after we've fetched a directory.
2526 Changes in version 0.0.2pre22 - 2004-02-26
2528 - Servers publish less revealing uname information in descriptors.
2529 - More memory tracking and assertions, to crash more usefully when
2531 - If the default torrc isn't there, just use some default defaults.
2532 Plus provide an internal dirservers file if they don't have one.
2533 - When the user tries to use Tor as an http proxy, give them an http
2534 501 failure explaining that we're a socks proxy.
2535 - Dump a new router.desc on hup, to help confused people who change
2536 their exit policies and then wonder why router.desc doesn't reflect
2538 - Clean up the generic tor.sh init script that we ship with.
2540 - If the exit stream is pending on the resolve, and a destroy arrives,
2541 then the stream wasn't getting removed from the pending list. I
2542 think this was the one causing recent server crashes.
2543 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2544 - When it couldn't resolve any dirservers, it was useless from then on.
2545 Now it reloads the RouterFile (or default dirservers) if it has no
2547 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2548 many users don't even *have* a /usr/local/sbin/.
2551 Changes in version 0.0.2pre21 - 2004-02-18
2553 - There's a ChangeLog file that actually reflects the changelog.
2554 - There's a 'torify' wrapper script, with an accompanying
2555 tor-tsocks.conf, that simplifies the process of using tsocks for
2556 tor. It even has a man page.
2557 - The tor binary gets installed to sbin rather than bin now.
2558 - Retry streams where the connected cell hasn't arrived in 15 seconds
2559 - Clean up exit policy handling -- get the default out of the torrc,
2560 so we can update it without forcing each server operator to fix
2562 - Allow imaps and pop3s in default exit policy
2564 - Prevent picking middleman nodes as the last node in the circuit
2567 Changes in version 0.0.2pre20 - 2004-01-30
2569 - We now have a deb package, and it's in debian unstable. Go to
2571 - I've split the TotalBandwidth option into BandwidthRate (how many
2572 bytes per second you want to allow, long-term) and
2573 BandwidthBurst (how many bytes you will allow at once before the cap
2574 kicks in). This better token bucket approach lets you, say, set
2575 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2576 performance while not exceeding your monthly bandwidth quota.
2577 - Push out a tls record's worth of data once you've got it, rather
2578 than waiting until you've read everything waiting to be read. This
2579 may improve performance by pipelining better. We'll see.
2580 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2581 from failed circuits (if they haven't been connected yet) and attach
2583 - Expire old streams that haven't managed to connect. Some day we'll
2584 have them reattach to new circuits instead.
2587 - Fix several memory leaks that were causing servers to become bloated
2589 - Fix a few very rare assert triggers. A few more remain.
2590 - Setuid to User _before_ complaining about running as root.
2593 Changes in version 0.0.2pre19 - 2004-01-07
2595 - Fix deadlock condition in dns farm. We were telling a child to die by
2596 closing the parent's file descriptor to him. But newer children were
2597 inheriting the open file descriptor from the parent, and since they
2598 weren't closing it, the socket never closed, so the child never read
2599 eof, so he never knew to exit. Similarly, dns workers were holding
2600 open other sockets, leading to all sorts of chaos.
2601 - New cleaner daemon() code for forking and backgrounding.
2602 - If you log to a file, it now prints an entry at the top of the
2603 logfile so you know it's working.
2604 - The onionskin challenge length was 30 bytes longer than necessary.
2605 - Started to patch up the spec so it's not quite so out of date.
2608 Changes in version 0.0.2pre18 - 2004-01-02
2610 - Fix endian issues with the 'integrity' field in the relay header.
2611 - Fix a potential bug where connections in state
2612 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2615 Changes in version 0.0.2pre17 - 2003-12-30
2617 - Made --debuglogfile (or any second log file, actually) work.
2618 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2619 adversary could force us into an infinite loop.
2622 - Each onionskin handshake now includes a hash of the computed key,
2623 to prove the server's identity and help perfect forward secrecy.
2624 - Changed cell size from 256 to 512 bytes (working toward compatibility
2626 - Changed cell length to 2 bytes, and moved it to the relay header.
2627 - Implemented end-to-end integrity checking for the payloads of
2629 - Separated streamid from 'recognized' (otherwise circuits will get
2630 messed up when we try to have streams exit from the middle). We
2631 use the integrity-checking to confirm that a cell is addressed to
2633 - Randomize the initial circid and streamid values, so an adversary who
2634 breaks into a node can't learn how many circuits or streams have
2638 Changes in version 0.0.2pre16 - 2003-12-14
2640 - Fixed a bug that made HUP trigger an assert
2641 - Fixed a bug where a circuit that immediately failed wasn't being
2642 counted as a failed circuit in counting retries.
2645 - Now we close the circuit when we get a truncated cell: otherwise we're
2646 open to an anonymity attack where a bad node in the path truncates
2647 the circuit and then we open streams at him.
2648 - Add port ranges to exit policies
2649 - Add a conservative default exit policy
2650 - Warn if you're running tor as root
2651 - on HUP, retry OR connections and close/rebind listeners
2652 - options.EntryNodes: try these nodes first when picking the first node
2653 - options.ExitNodes: if your best choices happen to include any of
2654 your preferred exit nodes, you choose among just those preferred
2656 - options.ExcludedNodes: nodes that are never picked in path building
2659 Changes in version 0.0.2pre15 - 2003-12-03
2660 o Robustness and bugfixes:
2661 - Sometimes clients would cache incorrect DNS resolves, which would
2662 really screw things up.
2663 - An OP that goes offline would slowly leak all its sockets and stop
2665 - A wide variety of bugfixes in exit node selection, exit policy
2666 handling, and processing pending streams when a new circuit is
2668 - Pick nodes for a path only from those the directory says are up
2669 - Choose randomly from all running dirservers, not always the first one
2670 - Increase allowed http header size for directory fetch.
2671 - Stop writing to stderr (if we're daemonized it will be closed).
2672 - Enable -g always, so cores will be more useful to me.
2673 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2676 - Wrote a man page. It lists commonly used options.
2679 - Change default loglevel to warn.
2680 - Make PidFile default to null rather than littering in your CWD.
2681 - OnionRouter config option is now obsolete. Instead it just checks
2683 - Moved to a single unified torrc file for both clients and servers.
2686 Changes in version 0.0.2pre14 - 2003-11-29
2687 o Robustness and bugfixes:
2688 - Force the admin to make the DataDirectory himself
2689 - to get ownership/permissions right
2690 - so clients no longer make a DataDirectory and then never use it
2691 - fix bug where a client who was offline for 45 minutes would never
2692 pull down a directory again
2693 - fix (or at least hide really well) the dns assert bug that was
2694 causing server crashes
2695 - warnings and improved robustness wrt clockskew for certs
2696 - use the native daemon(3) to daemonize, when available
2697 - exit if bind() fails
2698 - exit if neither socksport nor orport is defined
2699 - include our own tor_timegm (Win32 doesn't have its own)
2700 - bugfix for win32 with lots of connections
2701 - fix minor bias in PRNG
2702 - make dirserver more robust to corrupt cached directory
2705 - Wrote the design document (woo)
2707 o Circuit building and exit policies:
2708 - Circuits no longer try to use nodes that the directory has told them
2710 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2711 bitcounts (18.0.0.0/8).
2712 - Make AP connections standby for a circuit if no suitable circuit
2713 exists, rather than failing
2714 - Circuits choose exit node based on addr/port, exit policies, and
2715 which AP connections are standing by
2716 - Bump min pathlen from 2 to 3
2717 - Relay end cells have a payload to describe why the stream ended.
2718 - If the stream failed because of exit policy, try again with a new
2720 - Clients have a dns cache to remember resolved addresses.
2721 - Notice more quickly when we have no working circuits
2724 - APPort is now called SocksPort
2725 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2727 - RecommendedVersions is now a config variable rather than
2728 hardcoded (for dirservers)
2729 - Reloads config on HUP
2730 - Usage info on -h or --help
2731 - If you set User and Group config vars, it'll setu/gid to them.
2733 Changes in version 0.0.2pre13 - 2003-10-19
2734 o General stability:
2735 - SSL_write no longer fails when it returns WANTWRITE and the number
2736 of bytes in the buf has changed by the next SSL_write call.
2737 - Fix segfault fetching directory when network is down
2738 - Fix a variety of minor memory leaks
2739 - Dirservers reload the fingerprints file on HUP, so I don't have
2740 to take down the network when I approve a new router
2741 - Default server config file has explicit Address line to specify fqdn
2744 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2745 - Make listener connections not ever alloc bufs
2747 o Autoconf improvements:
2748 - don't clobber an external CFLAGS in ./configure
2749 - Make install now works
2750 - create var/lib/tor on make install
2751 - autocreate a tor.sh initscript to help distribs
2752 - autocreate the torrc and sample-server-torrc with correct paths
2754 o Log files and Daemonizing now work:
2755 - If --DebugLogFile is specified, log to it at -l debug
2756 - If --LogFile is specified, use it instead of commandline
2757 - If --RunAsDaemon is set, tor forks and backgrounds on startup