1 Changes in version 0.1.0.8-rc - 2005-05-23
3 - It turns out that kqueue on OS X 10.3.9 was causing kernel
4 panics. Disable kqueue on all OS X Tors.
5 - Fix RPM: remove duplicate line accidentally added to the rpm
7 - Disable threads on openbsd too, since its gethostaddr is not
9 - Tolerate libevent 0.8 since it still works, even though it's
11 - Enable building on Red Hat 9.0 again.
12 - Allow the middle hop of the testing circuit to be running any
13 version, now that most of them have the bugfix to let them connect
14 to unknown servers. This will allow reachability testing to work
15 even when 0.0.9.7-0.0.9.9 become obsolete.
16 - Handle relay cells with rh.length too large. This prevents
17 a potential attack that could read arbitrary memory (maybe even
18 keys) from the exit server's process.
19 - We screwed up the dirport reachability testing when we don't yet
20 have a cached version of the directory. Hopefully now fixed.
21 - Clean up router_load_single_router() (used by the controller),
22 so it doesn't seg fault on error.
23 - Fix a minor memory leak when somebody establishes an introduction
24 point at your Tor server.
25 - If a socks connection ends because read fails, don't warn that
26 you're not sending a socks reply back.
29 - Add HttpProxyAuthenticator config option too, that works like
30 the HttpsProxyAuthenticator config option.
31 - Encode hashed controller passwords in hex instead of base64,
32 to make it easier to write controllers.
35 Changes in version 0.1.0.7-rc - 2005-05-17
37 - Fix a bug in the OS X package installer that prevented it from
39 - Fix a script bug in the OS X package installer that made it
40 complain during installation.
41 - Find libevent even if it's hiding in /usr/local/ and your
42 CFLAGS and LDFLAGS don't tell you to look there.
43 - Be able to link with libevent as a shared library (the default
44 after 1.0d), even if it's hiding in /usr/local/lib and even
45 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
46 assuming you're running gcc. Otherwise fail and give a useful
48 - Fix a bug in the RPM packager: set home directory for _tor to
49 something more reasonable when first installing.
50 - Free a minor amount of memory that is still reachable on exit.
53 Changes in version 0.1.0.6-rc - 2005-05-14
55 - Implement --disable-threads configure option. Disable threads on
56 netbsd by default, because it appears to have no reentrant resolver
58 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
59 release (1.1) detects and disables kqueue if it's broken.
60 - Append default exit policy before checking for implicit internal
61 addresses. Now we don't log a bunch of complaints on startup
62 when using the default exit policy.
63 - Some people were putting "Address " in their torrc, and they had
64 a buggy resolver that resolved " " to 0.0.0.0. Oops.
65 - If DataDir is ~/.tor, and that expands to /.tor, then default to
66 LOCALSTATEDIR/tor instead.
67 - Fix fragmented-message bug in TorControl.py.
68 - Resolve a minor bug which would prevent unreachable dirports
69 from getting suppressed in the published descriptor.
70 - When the controller gave us a new descriptor, we weren't resolving
71 it immediately, so Tor would think its address was 0.0.0.0 until
72 we fetched a new directory.
73 - Fix an uppercase/lowercase case error in suppressing a bogus
74 libevent warning on some Linuxes.
77 - Begin scrubbing sensitive strings from logs by default. Turn off
78 the config option SafeLogging if you need to do debugging.
79 - Switch to a new buffer management algorithm, which tries to avoid
80 reallocing and copying quite as much. In first tests it looks like
81 it uses *more* memory on average, but less cpu.
82 - First cut at support for "create-fast" cells. Clients can use
83 these when extending to their first hop, since the TLS already
84 provides forward secrecy and authentication. Not enabled on
86 - When dirservers refuse a router descriptor, we now log its
87 contactinfo, platform, and the poster's IP address.
88 - Call tor_free_all instead of connections_free_all after forking, to
89 save memory on systems that need to fork.
90 - Whine at you if you're a server and you don't set your contactinfo.
91 - Implement --verify-config command-line option to check if your torrc
92 is valid without actually launching Tor.
93 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
94 rather than just rejecting it.
97 Changes in version 0.1.0.5-rc - 2005-04-27
99 - Stop trying to print a null pointer if an OR conn fails because
100 we didn't like its cert.
102 - Switch our internal buffers implementation to use a ring buffer,
103 to hopefully improve performance for fast servers a lot.
104 - Add HttpsProxyAuthenticator support (basic auth only), based
105 on patch from Adam Langley.
106 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
107 the fast servers that have been joining lately.
108 - Give hidden service accesses extra time on the first attempt,
109 since 60 seconds is often only barely enough. This might improve
111 - Improve performance for dirservers: stop re-parsing the whole
112 directory every time you regenerate it.
113 - Add more debugging info to help us find the weird dns netbsd
114 pthreads bug; cleaner debug messages to help track future issues.
117 Changes in version 0.1.0.4-rc - 2005-04-23
119 - If unofficial Tor clients connect and send weird TLS certs, our
120 Tor server triggers an assert. Stop asserting, and start handling
121 TLS errors better in other situations too.
122 - When the controller asks us to tell it about all the debug-level
123 logs, it turns out we were generating debug-level logs while
124 telling it about them, which turns into a bad loop. Now keep
125 track of whether you're sending a debug log to the controller,
126 and don't log when you are.
127 - Fix the "postdescriptor" feature of the controller interface: on
128 non-complete success, only say "done" once.
130 - Clients are now willing to load balance over up to 2mB, not 1mB,
131 of advertised bandwidth capacity.
132 - Add a NoPublish config option, so you can be a server (e.g. for
133 testing running Tor servers in other Tor networks) without
134 publishing your descriptor to the primary dirservers.
137 Changes in version 0.1.0.3-rc - 2005-04-08
138 o Improvements on 0.1.0.2-rc:
139 - Client now retries when streams end early for 'hibernating' or
140 'resource limit' reasons, rather than failing them.
141 - More automated handling for dirserver operators:
142 - Automatically approve nodes running 0.1.0.2-rc or later,
143 now that the the reachability detection stuff is working.
144 - Now we allow two unverified servers with the same nickname
145 but different keys. But if a nickname is verified, only that
146 nickname+key are allowed.
147 - If you're an authdirserver connecting to an address:port,
148 and it's not the OR you were expecting, forget about that
149 descriptor. If he *was* the one you were expecting, then forget
150 about all other descriptors for that address:port.
151 - Allow servers to publish descriptors from 12 hours in the future.
152 Corollary: only whine about clock skew from the dirserver if
153 he's a trusted dirserver (since now even verified servers could
154 have quite wrong clocks).
155 - Adjust maximum skew and age for rendezvous descriptors: let skew
156 be 48 hours rather than 90 minutes.
157 - Efficiency improvements:
158 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
159 it much faster to look up a circuit for each relay cell.
160 - Remove most calls to assert_all_pending_dns_resolves_ok(),
161 since they're eating our cpu on exit nodes.
162 - Stop wasting time doing a case insensitive comparison for every
163 dns name every time we do any lookup. Canonicalize the names to
164 lowercase and be done with it.
165 - Start sending 'truncated' cells back rather than destroy cells,
166 if the circuit closes in front of you. This means we won't have
167 to abandon partially built circuits.
168 - Only warn once per nickname from add_nickname_list_to_smartlist
169 per failure, so an entrynode or exitnode choice that's down won't
171 - Put a note in the torrc about abuse potential with the default
173 - Revise control spec and implementation to allow all log messages to
174 be sent to controller with their severities intact (suggested by
175 Matt Edman). Update TorControl to handle new log event types.
176 - Provide better explanation messages when controller's POSTDESCRIPTOR
178 - Stop putting nodename in the Platform string in server descriptors.
179 It doesn't actually help, and it is confusing/upsetting some people.
181 o Bugfixes on 0.1.0.2-rc:
182 - We were printing the host mask wrong in exit policies in server
183 descriptors. This isn't a critical bug though, since we were still
184 obeying the exit policy internally.
185 - Fix Tor when compiled with libevent but without pthreads: move
186 connection_unregister() from _connection_free() to
188 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
189 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
190 when we look through the connection array, we'll find any of the
191 cpu/dnsworkers. This is no good.
193 o Bugfixes on 0.0.9.x:
194 - Fix possible bug on threading platforms (e.g. win32) which was
195 leaking a file descriptor whenever a cpuworker or dnsworker died.
196 - When using preferred entry or exit nodes, ignore whether the
197 circuit wants uptime or capacity. They asked for the nodes, they
199 - chdir() to your datadirectory at the *end* of the daemonize process,
200 not the beginning. This was a problem because the first time you
201 run tor, if your datadir isn't there, and you have runasdaemon set
202 to 1, it will try to chdir to it before it tries to create it. Oops.
203 - Handle changed router status correctly when dirserver reloads
204 fingerprint file. We used to be dropping all unverified descriptors
205 right then. The bug was hidden because we would immediately
206 fetch a directory from another dirserver, which would include the
207 descriptors we just dropped.
208 - When we're connecting to an OR and he's got a different nickname/key
209 than we were expecting, only complain loudly if we're an OP or a
210 dirserver. Complaining loudly to the OR admins just confuses them.
211 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
212 artificially capped at 500kB.
215 Changes in version 0.1.0.2-rc - 2005-04-01
216 o Bugfixes on 0.1.0.1-rc:
217 - Fixes on reachability detection:
218 - Don't check for reachability while hibernating.
219 - If ORPort is reachable but DirPort isn't, still publish the
220 descriptor, but zero out DirPort until it's found reachable.
221 - When building testing circs for ORPort testing, use only
222 high-bandwidth nodes, so fewer circuits fail.
223 - Complain about unreachable ORPort separately from unreachable
224 DirPort, so the user knows what's going on.
225 - Make sure we only conclude ORPort reachability if we didn't
226 initiate the conn. Otherwise we could falsely conclude that
227 we're reachable just because we connected to the guy earlier
228 and he used that same pipe to extend to us.
229 - Authdirservers shouldn't do ORPort reachability detection,
230 since they're in clique mode, so it will be rare to find a
231 server not already connected to them.
232 - When building testing circuits, always pick middle hops running
233 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
234 bug. (This is a kludge; it will go away when 0.0.9.x becomes
236 - When we decide we're reachable, actually publish our descriptor
238 - Fix bug in redirectstream in the controller.
239 - Fix the state descriptor strings so logs don't claim edge streams
240 are in a different state than they actually are.
241 - Use recent libevent features when possible (this only really affects
242 win32 and osx right now, because the new libevent with these
243 features hasn't been released yet). Add code to suppress spurious
245 - Prevent possible segfault in connection_close_unattached_ap().
246 - Fix newlines on torrc in win32.
247 - Improve error msgs when tor-resolve fails.
249 o Improvements on 0.0.9.x:
250 - New experimental script tor/contrib/ExerciseServer.py (needs more
251 work) that uses the controller interface to build circuits and
252 fetch pages over them. This will help us bootstrap servers that
253 have lots of capacity but haven't noticed it yet.
254 - New experimental script tor/contrib/PathDemo.py (needs more work)
255 that uses the controller interface to let you choose whole paths
257 "<hostname>.<path,separated by dots>.<length of path>.path"
258 - When we've connected to an OR and handshaked but didn't like
259 the result, we were closing the conn without sending destroy
260 cells back for pending circuits. Now send those destroys.
263 Changes in version 0.1.0.1-rc - 2005-03-28
265 - Add reachability testing. Your Tor server will automatically try
266 to see if its ORPort and DirPort are reachable from the outside,
267 and it won't upload its descriptor until it decides they are.
268 - Handle unavailable hidden services better. Handle slow or busy
269 hidden services better.
270 - Add support for CONNECTing through https proxies, with "HttpsProxy"
272 - New exit policy: accept most low-numbered ports, rather than
273 rejecting most low-numbered ports.
274 - More Tor controller support (still experimental). See
275 http://tor.eff.org/doc/control-spec.txt for all the new features,
276 including signals to emulate unix signals from any platform;
277 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
278 closestream; closecircuit; etc.
279 - Make nt services work and start on startup on win32 (based on
280 patch by Matt Edman).
281 - Add a new AddressMap config directive to rewrite incoming socks
282 addresses. This lets you, for example, declare an implicit
283 required exit node for certain sites.
284 - Add a new TrackHostExits config directive to trigger addressmaps
285 for certain incoming socks addresses -- for sites that break when
286 your exit keeps changing (based on patch from Mike Perry).
287 - Redo the client-side dns cache so it's just an addressmap too.
288 - Notice when our IP changes, and reset stats/uptime/reachability.
289 - When an application is using socks5, give him the whole variety of
290 potential socks5 responses (connect refused, host unreachable, etc),
291 rather than just "success" or "failure".
292 - A more sane version numbering system. See
293 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
294 - New contributed script "exitlist": a simple python script to
295 parse directories and find Tor nodes that exit to listed
297 - New contributed script "privoxy-tor-toggle" to toggle whether
298 Privoxy uses Tor. Seems to be configured for Debian by default.
299 - Report HTTP reasons to client when getting a response from directory
300 servers -- so you can actually know what went wrong.
301 - New config option MaxAdvertisedBandwidth which lets you advertise
302 a low bandwidthrate (to not attract as many circuits) while still
303 allowing a higher bandwidthrate in reality.
305 o Robustness/stability fixes:
306 - Make Tor use Niels Provos's libevent instead of its current
307 poll-but-sometimes-select mess. This will let us use faster async
308 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
310 - pthread support now too. This was forced because when we forked,
311 we ended up wasting a lot of duplicate ram over time. Also switch
312 to foo_r versions of some library calls to allow reentry and
314 - Better handling for heterogeneous / unreliable nodes:
315 - Annotate circuits w/ whether they aim to contain high uptime nodes
316 and/or high capacity nodes. When building circuits, choose
318 - This means that every single node in an intro rend circuit,
319 not just the last one, will have a minimum uptime.
320 - New config option LongLivedPorts to indicate application streams
321 that will want high uptime circuits.
322 - Servers reset uptime when a dir fetch entirely fails. This
323 hopefully reflects stability of the server's network connectivity.
324 - If somebody starts his tor server in Jan 2004 and then fixes his
325 clock, don't make his published uptime be a year.
326 - Reset published uptime when you wake up from hibernation.
327 - Introduce a notion of 'internal' circs, which are chosen without
328 regard to the exit policy of the last hop. Intro and rendezvous
329 circs must be internal circs, to avoid leaking information. Resolve
330 and connect streams can use internal circs if they want.
331 - New circuit pooling algorithm: make sure to have enough circs around
332 to satisfy any predicted ports, and also make sure to have 2 internal
333 circs around if we've required internal circs lately (and with high
334 uptime if we've seen that lately too).
335 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
336 which describes how often we retry making new circuits if current
337 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
338 how long we're willing to make use of an already-dirty circuit.
339 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
340 circ as necessary, if there are any completed ones lying around
341 when we try to launch one.
342 - Make hidden services try to establish a rendezvous for 30 seconds,
343 rather than for n (where n=3) attempts to build a circuit.
344 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
345 "ShutdownWaitLength".
346 - Try to be more zealous about calling connection_edge_end when
347 things go bad with edge conns in connection.c.
348 - Revise tor-spec to add more/better stream end reasons.
349 - Revise all calls to connection_edge_end to avoid sending "misc",
350 and to take errno into account where possible.
353 - Fix a race condition that can trigger an assert, when we have a
354 pending create cell and an OR connection fails right then.
355 - Fix several double-mark-for-close bugs, e.g. where we were finding
356 a conn for a cell even if that conn is already marked for close.
357 - Make sequence of log messages when starting on win32 with no config
358 file more reasonable.
359 - When choosing an exit node for a new non-internal circ, don't take
360 into account whether it'll be useful for any pending x.onion
361 addresses -- it won't.
362 - Turn addr_policy_compare from a tristate to a quadstate; this should
363 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
364 for google.com" problem.
365 - Make "platform" string in descriptor more accurate for Win32 servers,
366 so it's not just "unknown platform".
367 - Fix an edge case in parsing config options (thanks weasel).
368 If they say "--" on the commandline, it's not an option.
369 - Reject odd-looking addresses at the client (e.g. addresses that
370 contain a colon), rather than having the server drop them because
372 - tor-resolve requests were ignoring .exit if there was a working circuit
373 they could use instead.
374 - REUSEADDR on normal platforms means you can rebind to the port
375 right after somebody else has let it go. But REUSEADDR on win32
376 means to let you bind to the port _even when somebody else
377 already has it bound_! So, don't do that on Win32.
378 - Change version parsing logic: a version is "obsolete" if it is not
379 recommended and (1) there is a newer recommended version in the
380 same series, or (2) there are no recommended versions in the same
381 series, but there are some recommended versions in a newer series.
382 A version is "new" if it is newer than any recommended version in
384 - Stop most cases of hanging up on a socks connection without sending
388 - Require BandwidthRate to be at least 20kB/s for servers.
389 - When a dirserver causes you to give a warn, mention which dirserver
391 - New config option DirAllowPrivateAddresses for authdirservers.
392 Now by default they refuse router descriptors that have non-IP or
393 private-IP addresses.
394 - Stop publishing socksport in the directory, since it's not
395 actually meant to be public. For compatibility, publish a 0 there
397 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
398 smart" value, that is low for servers and high for clients.
399 - If our clock jumps forward by 100 seconds or more, assume something
400 has gone wrong with our network and abandon all not-yet-used circs.
401 - Warn when exit policy implicitly allows local addresses.
402 - If we get an incredibly skewed timestamp from a dirserver mirror
403 that isn't a verified OR, don't warn -- it's probably him that's
405 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
406 cookies to disk and doesn't log each web request to disk. (Thanks
407 to Brett Carrington for pointing this out.)
408 - When a client asks us for a dir mirror and we don't have one,
409 launch an attempt to get a fresh one.
410 - If we're hibernating and we get a SIGINT, exit immediately.
411 - Add --with-dmalloc ./configure option, to track memory leaks.
412 - And try to free all memory on closing, so we can detect what
414 - Cache local dns resolves correctly even when they're .exit
416 - Give a better warning when some other server advertises an
417 ORPort that is actually an apache running ssl.
418 - Add "opt hibernating 1" to server descriptor to make it clearer
419 whether the server is hibernating.
422 Changes in version 0.0.9.9 - 2005-04-23
423 o Bugfixes on 0.0.9.x:
424 - If unofficial Tor clients connect and send weird TLS certs, our
425 Tor server triggers an assert. This release contains a minimal
426 backport from the broader fix that we put into 0.1.0.4-rc.
429 Changes in version 0.0.9.8 - 2005-04-07
430 o Bugfixes on 0.0.9.x:
431 - We have a bug that I haven't found yet. Sometimes, very rarely,
432 cpuworkers get stuck in the 'busy' state, even though the cpuworker
433 thinks of itself as idle. This meant that no new circuits ever got
434 established. Here's a workaround to kill any cpuworker that's been
435 busy for more than 100 seconds.
438 Changes in version 0.0.9.7 - 2005-04-01
439 o Bugfixes on 0.0.9.x:
440 - Fix another race crash bug (thanks to Glenn Fink for reporting).
441 - Compare identity to identity, not to nickname, when extending to
442 a router not already in the directory. This was preventing us from
443 extending to unknown routers. Oops.
444 - Make sure to create OS X Tor user in <500 range, so we aren't
445 creating actual system users.
446 - Note where connection-that-hasn't-sent-end was marked, and fix
447 a few really loud instances of this harmless bug (it's fixed more
451 Changes in version 0.0.9.6 - 2005-03-24
452 o Bugfixes on 0.0.9.x (crashes and asserts):
453 - Add new end stream reasons to maintainance branch. Fix bug where
454 reason (8) could trigger an assert. Prevent bug from recurring.
455 - Apparently win32 stat wants paths to not end with a slash.
456 - Fix assert triggers in assert_cpath_layer_ok(), where we were
457 blowing away the circuit that conn->cpath_layer points to, then
458 checking to see if the circ is well-formed. Backport check to make
459 sure we dont use the cpath on a closed connection.
460 - Prevent circuit_resume_edge_reading_helper() from trying to package
461 inbufs for marked-for-close streams.
462 - Don't crash on hup if your options->address has become unresolvable.
463 - Some systems (like OS X) sometimes accept() a connection and tell
464 you the remote host is 0.0.0.0:0. If this happens, due to some
465 other mis-features, we get confused; so refuse the conn for now.
467 o Bugfixes on 0.0.9.x (other):
468 - Fix harmless but scary "Unrecognized content encoding" warn message.
469 - Add new stream error reason: TORPROTOCOL reason means "you are not
470 speaking a version of Tor I understand; say bye-bye to your stream."
471 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
472 into the future, now that we are more tolerant of skew. This
473 resolves a bug where a Tor server would refuse to cache a directory
474 because all the directories it gets are too far in the future;
475 yet the Tor server never logs any complaints about clock skew.
476 - Mac packaging magic: make man pages useable, and do not overwrite
477 existing torrc files.
478 - Make OS X log happily to /var/log/tor/tor.log
481 Changes in version 0.0.9.5 - 2005-02-22
482 o Bugfixes on 0.0.9.x:
483 - Fix an assert race at exit nodes when resolve requests fail.
484 - Stop picking unverified dir mirrors--it only leads to misery.
485 - Patch from Matt Edman to make NT services work better. Service
486 support is still not compiled into the executable by default.
487 - Patch from Dmitri Bely so the Tor service runs better under
488 the win32 SYSTEM account.
489 - Make tor-resolve actually work (?) on Win32.
490 - Fix a sign bug when getrlimit claims to have 4+ billion
491 file descriptors available.
492 - Stop refusing to start when bandwidthburst == bandwidthrate.
493 - When create cells have been on the onion queue more than five
494 seconds, just send back a destroy and take them off the list.
497 Changes in version 0.0.9.4 - 2005-02-03
499 - Fix an assert bug that took down most of our servers: when
500 a server claims to have 1 GB of bandwidthburst, don't
502 - Don't crash as badly if we have spawned the max allowed number
503 of dnsworkers, or we're out of file descriptors.
504 - Block more file-sharing ports in the default exit policy.
505 - MaxConn is now automatically set to the hard limit of max
506 file descriptors we're allowed (ulimit -n), minus a few for
508 - Give a clearer message when servers need to raise their
509 ulimit -n when they start running out of file descriptors.
510 - SGI Compatibility patches from Jan Schaumann.
511 - Tolerate a corrupt cached directory better.
512 - When a dirserver hasn't approved your server, list which one.
513 - Go into soft hibernation after 95% of the bandwidth is used,
514 not 99%. This is especially important for daily hibernators who
515 have a small accounting max. Hopefully it will result in fewer
516 cut connections when the hard hibernation starts.
517 - Load-balance better when using servers that claim more than
519 - Make NT services work (experimental, only used if compiled in).
522 Changes in version 0.0.9.3 - 2005-01-21
524 - Backport the cpu use fixes from main branch, so busy servers won't
525 need as much processor time.
526 - Work better when we go offline and then come back, or when we
527 run Tor at boot before the network is up. We do this by
528 optimistically trying to fetch a new directory whenever an
529 application request comes in and we think we're offline -- the
530 human is hopefully a good measure of when the network is back.
531 - Backport some minimal hidserv bugfixes: keep rend circuits open as
532 long as you keep using them; actually publish hidserv descriptors
533 shortly after they change, rather than waiting 20-40 minutes.
534 - Enable Mac startup script by default.
535 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
536 - When you update AllowUnverifiedNodes or FirewallPorts via the
537 controller's setconf feature, we were always appending, never
539 - When you update HiddenServiceDir via setconf, it was screwing up
540 the order of reading the lines, making it fail.
541 - Do not rewrite a cached directory back to the cache; otherwise we
542 will think it is recent and not fetch a newer one on startup.
543 - Workaround for webservers that lie about Content-Encoding: Tor
544 now tries to autodetect compressed directories and compression
545 itself. This lets us Proxypass dir fetches through apache.
548 Changes in version 0.0.9.2 - 2005-01-04
549 o Bugfixes on 0.0.9 (crashes and asserts):
550 - Fix an assert on startup when the disk is full and you're logging
552 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
553 style address, then we'd crash.
554 - Fix an assert trigger when the running-routers string we get from
555 a dirserver is broken.
556 - Make worker threads start and run on win32. Now win32 servers
558 - Bandaid (not actually fix, but now it doesn't crash) an assert
559 where the dns worker dies mysteriously and the main Tor process
560 doesn't remember anything about the address it was resolving.
562 o Bugfixes on 0.0.9 (Win32):
563 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
564 name out of the warning/assert messages.
565 - Fix a superficial "unhandled error on read" bug on win32.
566 - The win32 installer no longer requires a click-through for our
567 license, since our Free Software license grants rights but does not
569 - Win32: When connecting to a dirserver fails, try another one
570 immediately. (This was already working for non-win32 Tors.)
571 - Stop trying to parse $HOME on win32 when hunting for default
573 - Make tor-resolve.c work on win32 by calling network_init().
575 o Bugfixes on 0.0.9 (other):
576 - Make 0.0.9.x build on Solaris again.
577 - Due to a fencepost error, we were blowing away the \n when reporting
578 confvalue items in the controller. So asking for multiple config
579 values at once couldn't work.
580 - When listing circuits that are pending on an opening OR connection,
581 if we're an OR we were listing circuits that *end* at us as
582 being pending on every listener, dns/cpu worker, etc. Stop that.
583 - Dirservers were failing to create 'running-routers' or 'directory'
584 strings if we had more than some threshold of routers. Fix them so
585 they can handle any number of routers.
586 - Fix a superficial "Duplicate mark for close" bug.
587 - Stop checking for clock skew for OR connections, even for servers.
588 - Fix a fencepost error that was chopping off the last letter of any
589 nickname that is the maximum allowed nickname length.
590 - Update URLs in log messages so they point to the new website.
591 - Fix a potential problem in mangling server private keys while
592 writing to disk (not triggered yet, as far as we know).
593 - Include the licenses for other free software we include in Tor,
594 now that we're shipping binary distributions more regularly.
597 Changes in version 0.0.9.1 - 2004-12-15
599 - Make hibernation actually work.
600 - Make HashedControlPassword config option work.
601 - When we're reporting event circuit status to a controller,
602 don't use the stream status code.
605 Changes in version 0.0.9 - 2004-12-12
606 o Bugfixes on 0.0.8.1 (Crashes and asserts):
607 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
608 write() call will fail and we handle it there.
609 - When we run out of disk space, or other log writing error, don't
610 crash. Just stop logging to that log and continue.
611 - Fix isspace() and friends so they still make Solaris happy
612 but also so they don't trigger asserts on win32.
613 - Fix assert failure on malformed socks4a requests.
614 - Fix an assert bug where a hidden service provider would fail if
615 the first hop of his rendezvous circuit was down.
616 - Better handling of size_t vs int, so we're more robust on 64
619 o Bugfixes on 0.0.8.1 (Win32):
620 - Make windows sockets actually non-blocking (oops), and handle
621 win32 socket errors better.
622 - Fix parse_iso_time on platforms without strptime (eg win32).
623 - win32: when being multithreaded, leave parent fdarray open.
624 - Better handling of winsock includes on non-MSV win32 compilers.
625 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
627 - Make unit tests work on win32.
629 o Bugfixes on 0.0.8.1 (Path selection and streams):
630 - Calculate timeout for waiting for a connected cell from the time
631 we sent the begin cell, not from the time the stream started. If
632 it took a long time to establish the circuit, we would time out
633 right after sending the begin cell.
634 - Fix router_compare_addr_to_addr_policy: it was not treating a port
635 of * as always matching, so we were picking reject *:* nodes as
636 exit nodes too. Oops.
637 - When read() failed on a stream, we would close it without sending
638 back an end. So 'connection refused' would simply be ignored and
639 the user would get no response.
640 - Stop a sigpipe: when an 'end' cell races with eof from the app,
641 we shouldn't hold-open-until-flush if the eof arrived first.
642 - Let resolve conns retry/expire also, rather than sticking around
644 - Fix more dns related bugs: send back resolve_failed and end cells
645 more reliably when the resolve fails, rather than closing the
646 circuit and then trying to send the cell. Also attach dummy resolve
647 connections to a circuit *before* calling dns_resolve(), to fix
648 a bug where cached answers would never be sent in RESOLVED cells.
650 o Bugfixes on 0.0.8.1 (Circuits):
651 - Finally fix a bug that's been plaguing us for a year:
652 With high load, circuit package window was reaching 0. Whenever
653 we got a circuit-level sendme, we were reading a lot on each
654 socket, but only writing out a bit. So we would eventually reach
655 eof. This would be noticed and acted on even when there were still
656 bytes sitting in the inbuf.
657 - Use identity comparison, not nickname comparison, to choose which
658 half of circuit-ID-space each side gets to use. This is needed
659 because sometimes we think of a router as a nickname, and sometimes
660 as a hex ID, and we can't predict what the other side will do.
662 o Bugfixes on 0.0.8.1 (Other):
663 - Fix a whole slew of memory leaks.
664 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
665 - If we are using select, make sure we stay within FD_SETSIZE.
666 - When poll() is interrupted, we shouldn't believe the revents values.
667 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
668 and smartlist_len, which are two major profiling offenders.
669 - If do_hup fails, actually notice.
670 - Flush the log file descriptor after we print "Tor opening log file",
671 so we don't see those messages days later.
672 - Hidden service operators now correctly handle version 1 style
673 INTRODUCE1 cells (nobody generates them still, so not a critical
675 - Handle more errnos from accept() without closing the listener.
676 Some OpenBSD machines were closing their listeners because
677 they ran out of file descriptors.
678 - Some people had wrapped their tor client/server in a script
679 that would restart it whenever it died. This did not play well
680 with our "shut down if your version is obsolete" code. Now people
681 don't fetch a new directory if their local cached version is
683 - Make our autogen.sh work on ksh as well as bash.
684 - Better torrc example lines for dirbindaddress and orbindaddress.
685 - Improved bounds checking on parsed ints (e.g. config options and
686 the ones we find in directories.)
687 - Stop using separate defaults for no-config-file and
688 empty-config-file. Now you have to explicitly turn off SocksPort,
689 if you don't want it open.
690 - We were starting to daemonize before we opened our logs, so if
691 there were any problems opening logs, we would complain to stderr,
692 which wouldn't work, and then mysteriously exit.
693 - If a verified OR connects to us before he's uploaded his descriptor,
694 or we verify him and hup but he still has the original TLS
695 connection, then conn->nickname is still set like he's unverified.
697 o Code security improvements, inspired by Ilja:
698 - tor_snprintf wrapper over snprintf with consistent (though not C99)
700 - Replace sprintf with tor_snprintf. (I think they were all safe, but
702 - Replace strcpy/strncpy with strlcpy in more places.
703 - Avoid strcat; use tor_snprintf or strlcat instead.
705 o Features (circuits and streams):
706 - New circuit building strategy: keep a list of ports that we've
707 used in the past 6 hours, and always try to have 2 circuits open
708 or on the way that will handle each such port. Seed us with port
709 80 so web users won't complain that Tor is "slow to start up".
710 - Make kill -USR1 dump more useful stats about circuits.
711 - When warning about retrying or giving up, print the address, so
712 the user knows which one it's talking about.
713 - If you haven't used a clean circuit in an hour, throw it away,
714 just to be on the safe side. (This means after 6 hours a totally
715 unused Tor client will have no circuits open.)
716 - Support "foo.nickname.exit" addresses, to let Alice request the
717 address "foo" as viewed by exit node "nickname". Based on a patch
719 - If your requested entry or exit node has advertised bandwidth 0,
721 - Be more greedy about filling up relay cells -- we try reading again
722 once we've processed the stuff we read, in case enough has arrived
723 to fill the last cell completely.
724 - Refuse application socks connections to port 0.
725 - Use only 0.0.9pre1 and later servers for resolve cells.
727 o Features (bandwidth):
728 - Hibernation: New config option "AccountingMax" lets you
729 set how many bytes per month (in each direction) you want to
730 allow your server to consume. Rather than spreading those
731 bytes out evenly over the month, we instead hibernate for some
732 of the month and pop up at a deterministic time, work until
733 the bytes are consumed, then hibernate again. Config option
734 "MonthlyAccountingStart" lets you specify which day of the month
735 your billing cycle starts on.
736 - Implement weekly/monthly/daily accounting: now you specify your
737 hibernation properties by
738 AccountingMax N bytes|KB|MB|GB|TB
739 AccountingStart day|week|month [day] HH:MM
740 Defaults to "month 1 0:00".
741 - Let bandwidth and interval config options be specified as 5 bytes,
742 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
744 o Features (directories):
745 - New "router-status" line in directory, to better bind each verified
746 nickname to its identity key.
747 - Clients can ask dirservers for /dir.z to get a compressed version
748 of the directory. Only works for servers running 0.0.9, of course.
749 - Make clients cache directories and use them to seed their router
750 lists at startup. This means clients have a datadir again.
751 - Respond to content-encoding headers by trying to uncompress as
753 - Clients and servers now fetch running-routers; cache
754 running-routers; compress running-routers; serve compressed
756 - Make moria2 advertise a dirport of 80, so people behind firewalls
757 will be able to get a directory.
759 - Dirservers translate requests for http://%s:%d/x to /x
760 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
761 be routed through this host.
762 - Clients ask for /tor/x rather than /x for new enough dirservers.
763 This way we can one day coexist peacefully with apache.
764 - Clients specify a "Host: %s%d" http header, to be compatible
765 with more proxies, and so running squid on an exit node can work.
766 - Protect dirservers from overzealous descriptor uploading -- wait
767 10 seconds after directory gets dirty, before regenerating.
769 o Features (packages and install):
770 - Add NSI installer contributed by J Doe.
771 - Apply NT service patch from Osamu Fujino. Still needs more work.
772 - Commit VC6 and VC7 workspace/project files.
773 - Commit a tor.spec for making RPM files, with help from jbash.
774 - Add contrib/torctl.in contributed by Glenn Fink.
775 - Make expand_filename handle ~ and ~username.
776 - Use autoconf to enable largefile support where necessary. Use
777 ftello where available, since ftell can fail at 2GB.
778 - Ship src/win32/ in the tarball, so people can use it to build.
779 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
782 o Features (ui controller):
783 - Control interface: a separate program can now talk to your
784 client/server over a socket, and get/set config options, receive
785 notifications of circuits and streams starting/finishing/dying,
786 bandwidth used, etc. The next step is to get some GUIs working.
787 Let us know if you want to help out. See doc/control-spec.txt .
788 - Ship a contrib/tor-control.py as an example script to interact
789 with the control port.
790 - "tor --hash-password zzyxz" will output a salted password for
791 use in authenticating to the control interface.
792 - Implement the control-spec's SAVECONF command, to write your
793 configuration to torrc.
794 - Get cookie authentication for the controller closer to working.
795 - When set_conf changes our server descriptor, upload a new copy.
796 But don't upload it too often if there are frequent changes.
798 o Features (config and command-line):
799 - Deprecate unofficial config option abbreviations, and abbreviations
800 not on the command line.
801 - Configuration infrastructure support for warning on obsolete
803 - Give a slightly more useful output for "tor -h".
804 - Break DirFetchPostPeriod into:
805 - DirFetchPeriod for fetching full directory,
806 - StatusFetchPeriod for fetching running-routers,
807 - DirPostPeriod for posting server descriptor,
808 - RendPostPeriod for posting hidden service descriptors.
809 - New log format in config:
810 "Log minsev[-maxsev] stdout|stderr|syslog" or
811 "Log minsev[-maxsev] file /var/foo"
812 - DirPolicy config option, to let people reject incoming addresses
813 from their dirserver.
814 - "tor --list-fingerprint" will list your identity key fingerprint
816 - Make tor --version --version dump the cvs Id of every file.
817 - New 'MyFamily nick1,...' config option for a server to
818 specify other servers that shouldn't be used in the same circuit
819 with it. Only believed if nick1 also specifies us.
820 - New 'NodeFamily nick1,nick2,...' config option for a client to
821 specify nodes that it doesn't want to use in the same circuit.
822 - New 'Redirectexit pattern address:port' config option for a
823 server to redirect exit connections, e.g. to a local squid.
824 - Add "pass" target for RedirectExit, to make it easier to break
825 out of a sequence of RedirectExit rules.
826 - Make the dirservers file obsolete.
827 - Include a dir-signing-key token in directories to tell the
828 parsing entity which key is being used to sign.
829 - Remove the built-in bulky default dirservers string.
830 - New config option "Dirserver %s:%d [fingerprint]", which can be
831 repeated as many times as needed. If no dirservers specified,
832 default to moria1,moria2,tor26.
833 - Make 'Routerfile' config option obsolete.
834 - Discourage people from setting their dirfetchpostperiod more often
835 than once per minute.
838 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
840 - Accept *:706 (silc) in default exit policy.
841 - Implement new versioning format for post 0.1.
842 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
843 log more informatively.
844 - Check clock skew for verified servers, but allow unverified
845 servers and clients to have any clock skew.
846 - Make sure the hidden service descriptors are at a random offset
847 from each other, to hinder linkability.
848 - Clients now generate a TLS cert too, in preparation for having
849 them act more like real nodes.
850 - Add a pure-C tor-resolve implementation.
851 - Use getrlimit and friends to ensure we can reach MaxConn (currently
852 1024) file descriptors.
853 - Raise the max dns workers from 50 to 100.
856 Changes in version 0.0.8.1 - 2004-10-13
858 - Fix a seg fault that can be triggered remotely for Tor
859 clients/servers with an open dirport.
860 - Fix a rare assert trigger, where routerinfos for entries in
861 our cpath would expire while we're building the path.
862 - Fix a bug in OutboundBindAddress so it (hopefully) works.
863 - Fix a rare seg fault for people running hidden services on
864 intermittent connections.
865 - Fix a bug in parsing opt keywords with objects.
866 - Fix a stale pointer assert bug when a stream detaches and
868 - Fix a string format vulnerability (probably not exploitable)
869 in reporting stats locally.
870 - Fix an assert trigger: sometimes launching circuits can fail
871 immediately, e.g. because too many circuits have failed recently.
872 - Fix a compile warning on 64 bit platforms.
875 Changes in version 0.0.8 - 2004-08-25
877 - Made our unit tests compile again on OpenBSD 3.5, and tor
878 itself compile again on OpenBSD on a sparc64.
879 - We were neglecting milliseconds when logging on win32, so
880 everything appeared to happen at the beginning of each second.
881 - Check directory signature _before_ you decide whether you're
882 you're running an obsolete version and should exit.
883 - Check directory signature _before_ you parse the running-routers
884 list to decide who's running.
885 - Check return value of fclose while writing to disk, so we don't
886 end up with broken files when servers run out of disk space.
887 - Port it to SunOS 5.9 / Athena
888 - Fix two bugs in saving onion keys to disk when rotating, so
889 hopefully we'll get fewer people using old onion keys.
890 - Remove our mostly unused -- and broken -- hex_encode()
891 function. Use base16_encode() instead. (Thanks to Timo Lindfors
892 for pointing out this bug.)
893 - Only pick and establish intro points after we've gotten a
895 - Fix assert triggers: if the other side returns an address 0.0.0.0,
896 don't put it into the client dns cache.
897 - If a begin failed due to exit policy, but we believe the IP
898 address should have been allowed, switch that router to exitpolicy
899 reject *:* until we get our next directory.
902 - 'Extend' relay cell payloads now include the digest of the
903 intended next hop's identity key. Now we can verify that we're
904 extending to the right router, and also extend to routers we
905 hadn't heard of before.
908 - Tor nodes can now act as relays (with an advertised ORPort)
909 without being manually verified by the dirserver operators.
910 - Uploaded descriptors of unverified routers are now accepted
911 by the dirservers, and included in the directory.
912 - Verified routers are listed by nickname in the running-routers
913 list; unverified routers are listed as "$<fingerprint>".
914 - We now use hash-of-identity-key in most places rather than
915 nickname or addr:port, for improved security/flexibility.
916 - AllowUnverifiedNodes config option to let circuits choose no-name
917 routers in entry,middle,exit,introduction,rendezvous positions.
918 Allow middle and rendezvous positions by default.
919 - When picking unverified routers, skip those with low uptime and/or
920 low bandwidth, depending on what properties you care about.
921 - ClientOnly option for nodes that never want to become servers.
923 - "AuthoritativeDir 1" option for the official dirservers.
924 - Now other nodes (clients and servers) will cache the latest
925 directory they've pulled down.
926 - They can enable their DirPort to serve it to others.
927 - Clients will pull down a directory from any node with an open
928 DirPort, and check the signature/timestamp correctly.
929 - Authoritative dirservers now fetch directories from other
930 authdirservers, to stay better synced.
931 - Running-routers list tells who's down also, along with noting
932 if they're verified (listed by nickname) or unverified (listed
934 - Allow dirservers to serve running-router list separately.
936 - You can now fetch $DIRURL/running-routers to get just the
937 running-routers line, not the whole descriptor list. (But
938 clients don't use this yet.)
939 - Clients choose nodes proportional to advertised bandwidth.
940 - Clients avoid using nodes with low uptime as introduction points.
941 - Handle servers with dynamic IP addresses: don't just replace
942 options->Address with the resolved one at startup, and
943 detect our address right before we make a routerinfo each time.
944 - 'FascistFirewall' option to pick dirservers and ORs on specific
945 ports; plus 'FirewallPorts' config option to tell FascistFirewall
946 which ports are open. (Defaults to 80,443)
947 - Try other dirservers immediately if the one you try is down. This
948 should tolerate down dirservers better now.
949 - ORs connect-on-demand to other ORs
950 - If you get an extend cell to an OR you're not connected to,
951 connect, handshake, and forward the create cell.
952 - The authoritative dirservers stay connected to everybody,
953 and everybody stays connected to 0.0.7 servers, but otherwise
954 clients/servers expire unused connections after 5 minutes.
955 - When servers get a sigint, they delay 30 seconds (refusing new
956 connections) then exit. A second sigint causes immediate exit.
957 - File and name management:
958 - Look for .torrc if no CONFDIR "torrc" is found.
959 - If no datadir is defined, then choose, make, and secure ~/.tor
961 - If torrc not found, exitpolicy reject *:*.
962 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
963 - If no nickname is defined, derive default from hostname.
964 - Rename secret key files, e.g. identity.key -> secret_id_key,
965 to discourage people from mailing their identity key to tor-ops.
966 - Refuse to build a circuit before the directory has arrived --
967 it won't work anyway, since you won't know the right onion keys
969 - Parse tor version numbers so we can do an is-newer-than check
970 rather than an is-in-the-list check.
971 - New socks command 'resolve', to let us shim gethostbyname()
973 - A 'tor_resolve' script to access the socks resolve functionality.
974 - A new socks-extensions.txt doc file to describe our
975 interpretation and extensions to the socks protocols.
976 - Add a ContactInfo option, which gets published in descriptor.
977 - Write tor version at the top of each log file
978 - New docs in the tarball:
980 - Document that you should proxy your SSL traffic too.
981 - Log a warning if the user uses an unsafe socks variant, so people
982 are more likely to learn about privoxy or socat.
983 - Log a warning if you're running an unverified server, to let you
984 know you might want to get it verified.
985 - Change the default exit policy to reject the default edonkey,
986 kazaa, gnutella ports.
987 - Add replace_file() to util.[ch] to handle win32's rename().
988 - Publish OR uptime in descriptor (and thus in directory) too.
989 - Remember used bandwidth (both in and out), and publish 15-minute
990 snapshots for the past day into our descriptor.
991 - Be more aggressive about trying to make circuits when the network
992 has changed (e.g. when you unsuspend your laptop).
993 - Check for time skew on http headers; report date in response to
995 - If the entrynode config line has only one node, don't pick it as
997 - Add strict{entry|exit}nodes config options. If set to 1, then
998 we refuse to build circuits that don't include the specified entry
1000 - OutboundBindAddress config option, to bind to a specific
1001 IP address for outgoing connect()s.
1002 - End truncated log entries (e.g. directories) with "[truncated]".
1005 Changes in version 0.0.7.3 - 2004-08-12
1006 o Stop dnsworkers from triggering an assert failure when you
1007 ask them to resolve the host "".
1010 Changes in version 0.0.7.2 - 2004-07-07
1011 o A better fix for the 0.0.0.0 problem, that will hopefully
1012 eliminate the remaining related assertion failures.
1015 Changes in version 0.0.7.1 - 2004-07-04
1016 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
1017 since internally we use 0.0.0.0 to signify "not yet resolved".
1020 Changes in version 0.0.7 - 2004-06-07
1021 o Fixes for crashes and other obnoxious bugs:
1022 - Fix an epipe bug: sometimes when directory connections failed
1023 to connect, we would give them a chance to flush before closing
1025 - When we detached from a circuit because of resolvefailed, we
1026 would immediately try the same circuit twice more, and then
1027 give up on the resolve thinking we'd tried three different
1029 - Limit the number of intro circuits we'll attempt to build for a
1030 hidden service per 15-minute period.
1031 - Check recommended-software string *early*, before actually parsing
1032 the directory. Thus we can detect an obsolete version and exit,
1033 even if the new directory format doesn't parse.
1034 o Fixes for security bugs:
1035 - Remember which nodes are dirservers when you startup, and if a
1036 random OR enables his dirport, don't automatically assume he's
1037 a trusted dirserver.
1039 - Directory connections were asking the wrong poll socket to
1040 start writing, and not asking themselves to start writing.
1041 - When we detached from a circuit because we sent a begin but
1042 didn't get a connected, we would use it again the first time;
1043 but after that we would correctly switch to a different one.
1044 - Stop warning when the first onion decrypt attempt fails; they
1045 will sometimes legitimately fail now that we rotate keys.
1046 - Override unaligned-access-ok check when $host_cpu is ia64 or
1047 arm. Apparently they allow it but the kernel whines.
1048 - Dirservers try to reconnect periodically too, in case connections
1050 - Fix some memory leaks in directory servers.
1051 - Allow backslash in Win32 filenames.
1052 - Made Tor build complain-free on FreeBSD, hopefully without
1053 breaking other BSD builds. We'll see.
1054 - Check directory signatures based on name of signer, not on whom
1055 we got the directory from. This will let us cache directories more
1057 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
1060 - Doxygen markup on all functions and global variables.
1061 - Make directory functions update routerlist, not replace it. So
1062 now directory disagreements are not so critical a problem.
1063 - Remove the upper limit on number of descriptors in a dirserver's
1064 directory (not that we were anywhere close).
1065 - Allow multiple logfiles at different severity ranges.
1066 - Allow *BindAddress to specify ":port" rather than setting *Port
1067 separately. Allow multiple instances of each BindAddress config
1068 option, so you can bind to multiple interfaces if you want.
1069 - Allow multiple exit policy lines, which are processed in order.
1070 Now we don't need that huge line with all the commas in it.
1071 - Enable accept/reject policies on SOCKS connections, so you can bind
1072 to 0.0.0.0 but still control who can use your OP.
1073 - Updated the man page to reflect these features.
1076 Changes in version 0.0.6.2 - 2004-05-16
1077 o Our integrity-checking digest was checking only the most recent cell,
1078 not the previous cells like we'd thought.
1079 Thanks to Stefan Mark for finding the flaw!
1082 Changes in version 0.0.6.1 - 2004-05-06
1083 o Fix two bugs in our AES counter-mode implementation (this affected
1084 onion-level stream encryption, but not TLS-level). It turns
1085 out we were doing something much more akin to a 16-character
1086 polyalphabetic cipher. Oops.
1087 Thanks to Stefan Mark for finding the flaw!
1088 o Retire moria3 as a directory server, and add tor26 as a directory
1092 Changes in version 0.0.6 - 2004-05-02
1094 - Hidden services and rendezvous points are implemented. Go to
1095 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
1096 hidden services. (This only works via a socks4a proxy such as
1097 Privoxy, and currently it's quite slow.)
1098 - We now rotate link (tls context) keys and onion keys.
1099 - CREATE cells now include oaep padding, so you can tell
1100 if you decrypted them correctly.
1101 - Retry stream correctly when we fail to connect because of
1102 exit-policy-reject (should try another) or can't-resolve-address.
1103 - When we hup a dirserver and we've *removed* a server from the
1104 approved-routers list, now we remove that server from the
1105 in-memory directories too.
1106 - Add bandwidthburst to server descriptor.
1107 - Directories now say which dirserver signed them.
1108 - Use a tor_assert macro that logs failed assertions too.
1109 - Since we don't support truncateds much, don't bother sending them;
1110 just close the circ.
1111 - Fetch randomness from /dev/urandom better (not via fopen/fread)
1112 - Better debugging for tls errors
1113 - Set Content-Type on the directory and hidserv descriptor.
1114 - Remove IVs from cipher code, since AES-ctr has none.
1116 - Fix an assert trigger for exit nodes that's been plaguing us since
1117 the days of 0.0.2prexx (thanks weasel!)
1118 - Fix a bug where we were closing tls connections intermittently.
1119 It turns out openssl keeps its errors around -- so if an error
1120 happens, and you don't ask about it, and then another openssl
1121 operation happens and succeeds, and you ask if there was an error,
1122 it tells you about the first error.
1123 - Fix a bug that's been lurking since 27 may 03 (!)
1124 When passing back a destroy cell, we would use the wrong circ id.
1125 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
1126 - Some versions of openssl have an SSL_pending function that erroneously
1127 returns bytes when there is a non-application record pending.
1128 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
1129 o We were using an array of length zero in a few places.
1130 o Win32's gethostbyname can't resolve an IP to an IP.
1131 o Win32's close can't close a socket.
1132 o Handle windows socket errors correctly.
1134 - check for <sys/limits.h> so we build on FreeBSD again, and
1135 <machine/limits.h> for NetBSD.
1138 Changes in version 0.0.5 - 2004-03-30
1139 o Install torrc as torrc.sample -- we no longer clobber your
1141 o Fix mangled-state bug in directory fetching (was causing sigpipes).
1142 o Only build circuits after we've fetched the directory: clients were
1143 using only the directory servers before they'd fetched a directory.
1144 This also means longer startup time; so it goes.
1145 o Fix an assert trigger where an OP would fail to handshake, and we'd
1146 expect it to have a nickname.
1147 o Work around a tsocks bug: do a socks reject when AP connection dies
1148 early, else tsocks goes into an infinite loop.
1149 o Hold socks connection open until reply is flushed (if possible)
1150 o Make exit nodes resolve IPs to IPs immediately, rather than asking
1151 the dns farm to do it.
1152 o Fix c99 aliasing warnings in rephist.c
1153 o Don't include server descriptors that are older than 24 hours in the
1155 o Give socks 'reject' replies their whole 15s to attempt to flush,
1156 rather than seeing the 60s timeout and assuming the flush had failed.
1157 o Clean automake droppings from the cvs repository
1158 o Add in a 'notice' log level for things the operator should hear
1159 but that aren't warnings
1162 Changes in version 0.0.4 - 2004-03-26
1163 o When connecting to a dirserver or OR and the network is down,
1167 Changes in version 0.0.3 - 2004-03-26
1168 o Warn and fail if server chose a nickname with illegal characters
1169 o Port to Solaris and Sparc:
1170 - include missing header fcntl.h
1171 - have autoconf find -lsocket -lnsl automatically
1172 - deal with hardware word alignment
1173 - make uname() work (solaris has a different return convention)
1174 - switch from using signal() to sigaction()
1175 o Preliminary work on reputation system:
1176 - Keep statistics on success/fail of connect attempts; they're published
1177 by kill -USR1 currently.
1178 - Add a RunTesting option to try to learn link state by creating test
1179 circuits, even when SocksPort is off.
1180 - Remove unused open circuits when there are too many.
1183 Changes in version 0.0.2 - 2004-03-19
1184 - Include strlcpy and strlcat for safer string ops
1185 - define INADDR_NONE so we compile (but still not run) on solaris
1188 Changes in version 0.0.2pre27 - 2004-03-14
1190 - Allow internal tor networks (we were rejecting internal IPs,
1191 now we allow them if they're set explicitly).
1192 - And fix a few endian issues.
1195 Changes in version 0.0.2pre26 - 2004-03-14
1197 - If a stream times out after 15s without a connected cell, don't
1198 try that circuit again: try a new one.
1199 - Retry streams at most 4 times. Then give up.
1200 - When a dirserver gets a descriptor from an unknown router, it
1201 logs its fingerprint (so the dirserver operator can choose to
1202 accept it even without mail from the server operator).
1203 - Inform unapproved servers when we reject their descriptors.
1204 - Make tor build on Windows again. It works as a client, who knows
1206 - Clearer instructions in the torrc for how to set up a server.
1207 - Be more efficient about reading fd's when our global token bucket
1208 (used for rate limiting) becomes empty.
1210 - Stop asserting that computers always go forward in time. It's
1212 - When we sent a cell (e.g. destroy) and then marked an OR connection
1213 expired, we might close it before finishing a flush if the other
1214 side isn't reading right then.
1215 - Don't allow dirservers to start if they haven't defined
1217 - We were caching transient dns failures. Oops.
1218 - Prevent servers from publishing an internal IP as their address.
1219 - Address a strcat vulnerability in circuit.c
1222 Changes in version 0.0.2pre25 - 2004-03-04
1224 - Put the OR's IP in its router descriptor, not its fqdn. That way
1225 we'll stop being stalled by gethostbyname for nodes with flaky dns,
1228 - If the user typed in an address that didn't resolve, the server
1232 Changes in version 0.0.2pre24 - 2004-03-03
1234 - Fix an assertion failure in dns.c, where we were trying to dequeue
1235 a pending dns resolve even if it wasn't pending
1236 - Fix a spurious socks5 warning about still trying to write after the
1237 connection is finished.
1238 - Hold certain marked_for_close connections open until they're finished
1239 flushing, rather than losing bytes by closing them too early.
1240 - Correctly report the reason for ending a stream
1241 - Remove some duplicate calls to connection_mark_for_close
1242 - Put switch_id and start_daemon earlier in the boot sequence, so it
1243 will actually try to chdir() to options.DataDirectory
1244 - Make 'make test' exit(1) if a test fails; fix some unit tests
1245 - Make tor fail when you use a config option it doesn't know about,
1246 rather than warn and continue.
1247 - Make --version work
1248 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
1251 Changes in version 0.0.2pre23 - 2004-02-29
1253 - Print a statement when the first circ is finished, so the user
1255 - If a relay cell is unrecognized at the end of the circuit,
1256 send back a destroy. (So attacks to mutate cells are more
1258 - New config option 'excludenodes' to avoid certain nodes for circuits.
1259 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
1260 so you can collect coredumps there.
1262 - Fix a bug in tls flushing where sometimes data got wedged and
1263 didn't flush until more data got sent. Hopefully this bug was
1264 a big factor in the random delays we were seeing.
1265 - Make 'connected' cells include the resolved IP, so the client
1266 dns cache actually gets populated.
1267 - Disallow changing from ORPort=0 to ORPort>0 on hup.
1268 - When we time-out on a stream and detach from the circuit, send an
1269 end cell down it first.
1270 - Only warn about an unknown router (in exitnodes, entrynodes,
1271 excludenodes) after we've fetched a directory.
1274 Changes in version 0.0.2pre22 - 2004-02-26
1276 - Servers publish less revealing uname information in descriptors.
1277 - More memory tracking and assertions, to crash more usefully when
1279 - If the default torrc isn't there, just use some default defaults.
1280 Plus provide an internal dirservers file if they don't have one.
1281 - When the user tries to use Tor as an http proxy, give them an http
1282 501 failure explaining that we're a socks proxy.
1283 - Dump a new router.desc on hup, to help confused people who change
1284 their exit policies and then wonder why router.desc doesn't reflect
1286 - Clean up the generic tor.sh init script that we ship with.
1288 - If the exit stream is pending on the resolve, and a destroy arrives,
1289 then the stream wasn't getting removed from the pending list. I
1290 think this was the one causing recent server crashes.
1291 - Use a more robust poll on OSX 10.3, since their poll is flaky.
1292 - When it couldn't resolve any dirservers, it was useless from then on.
1293 Now it reloads the RouterFile (or default dirservers) if it has no
1295 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
1296 many users don't even *have* a /usr/local/sbin/.
1299 Changes in version 0.0.2pre21 - 2004-02-18
1301 - There's a ChangeLog file that actually reflects the changelog.
1302 - There's a 'torify' wrapper script, with an accompanying
1303 tor-tsocks.conf, that simplifies the process of using tsocks for
1304 tor. It even has a man page.
1305 - The tor binary gets installed to sbin rather than bin now.
1306 - Retry streams where the connected cell hasn't arrived in 15 seconds
1307 - Clean up exit policy handling -- get the default out of the torrc,
1308 so we can update it without forcing each server operator to fix
1310 - Allow imaps and pop3s in default exit policy
1312 - Prevent picking middleman nodes as the last node in the circuit
1315 Changes in version 0.0.2pre20 - 2004-01-30
1317 - We now have a deb package, and it's in debian unstable. Go to
1319 - I've split the TotalBandwidth option into BandwidthRate (how many
1320 bytes per second you want to allow, long-term) and
1321 BandwidthBurst (how many bytes you will allow at once before the cap
1322 kicks in). This better token bucket approach lets you, say, set
1323 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
1324 performance while not exceeding your monthly bandwidth quota.
1325 - Push out a tls record's worth of data once you've got it, rather
1326 than waiting until you've read everything waiting to be read. This
1327 may improve performance by pipelining better. We'll see.
1328 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
1329 from failed circuits (if they haven't been connected yet) and attach
1331 - Expire old streams that haven't managed to connect. Some day we'll
1332 have them reattach to new circuits instead.
1335 - Fix several memory leaks that were causing servers to become bloated
1337 - Fix a few very rare assert triggers. A few more remain.
1338 - Setuid to User _before_ complaining about running as root.
1341 Changes in version 0.0.2pre19 - 2004-01-07
1343 - Fix deadlock condition in dns farm. We were telling a child to die by
1344 closing the parent's file descriptor to him. But newer children were
1345 inheriting the open file descriptor from the parent, and since they
1346 weren't closing it, the socket never closed, so the child never read
1347 eof, so he never knew to exit. Similarly, dns workers were holding
1348 open other sockets, leading to all sorts of chaos.
1349 - New cleaner daemon() code for forking and backgrounding.
1350 - If you log to a file, it now prints an entry at the top of the
1351 logfile so you know it's working.
1352 - The onionskin challenge length was 30 bytes longer than necessary.
1353 - Started to patch up the spec so it's not quite so out of date.
1356 Changes in version 0.0.2pre18 - 2004-01-02
1358 - Fix endian issues with the 'integrity' field in the relay header.
1359 - Fix a potential bug where connections in state
1360 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
1363 Changes in version 0.0.2pre17 - 2003-12-30
1365 - Made --debuglogfile (or any second log file, actually) work.
1366 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
1367 adversary could force us into an infinite loop.
1370 - Each onionskin handshake now includes a hash of the computed key,
1371 to prove the server's identity and help perfect forward secrecy.
1372 - Changed cell size from 256 to 512 bytes (working toward compatibility
1374 - Changed cell length to 2 bytes, and moved it to the relay header.
1375 - Implemented end-to-end integrity checking for the payloads of
1377 - Separated streamid from 'recognized' (otherwise circuits will get
1378 messed up when we try to have streams exit from the middle). We
1379 use the integrity-checking to confirm that a cell is addressed to
1381 - Randomize the initial circid and streamid values, so an adversary who
1382 breaks into a node can't learn how many circuits or streams have
1386 Changes in version 0.0.2pre16 - 2003-12-14
1388 - Fixed a bug that made HUP trigger an assert
1389 - Fixed a bug where a circuit that immediately failed wasn't being
1390 counted as a failed circuit in counting retries.
1393 - Now we close the circuit when we get a truncated cell: otherwise we're
1394 open to an anonymity attack where a bad node in the path truncates
1395 the circuit and then we open streams at him.
1396 - Add port ranges to exit policies
1397 - Add a conservative default exit policy
1398 - Warn if you're running tor as root
1399 - on HUP, retry OR connections and close/rebind listeners
1400 - options.EntryNodes: try these nodes first when picking the first node
1401 - options.ExitNodes: if your best choices happen to include any of
1402 your preferred exit nodes, you choose among just those preferred
1404 - options.ExcludedNodes: nodes that are never picked in path building
1407 Changes in version 0.0.2pre15 - 2003-12-03
1408 o Robustness and bugfixes:
1409 - Sometimes clients would cache incorrect DNS resolves, which would
1410 really screw things up.
1411 - An OP that goes offline would slowly leak all its sockets and stop
1413 - A wide variety of bugfixes in exit node selection, exit policy
1414 handling, and processing pending streams when a new circuit is
1416 - Pick nodes for a path only from those the directory says are up
1417 - Choose randomly from all running dirservers, not always the first one
1418 - Increase allowed http header size for directory fetch.
1419 - Stop writing to stderr (if we're daemonized it will be closed).
1420 - Enable -g always, so cores will be more useful to me.
1421 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
1424 - Wrote a man page. It lists commonly used options.
1427 - Change default loglevel to warn.
1428 - Make PidFile default to null rather than littering in your CWD.
1429 - OnionRouter config option is now obsolete. Instead it just checks
1431 - Moved to a single unified torrc file for both clients and servers.
1434 Changes in version 0.0.2pre14 - 2003-11-29
1435 o Robustness and bugfixes:
1436 - Force the admin to make the DataDirectory himself
1437 - to get ownership/permissions right
1438 - so clients no longer make a DataDirectory and then never use it
1439 - fix bug where a client who was offline for 45 minutes would never
1440 pull down a directory again
1441 - fix (or at least hide really well) the dns assert bug that was
1442 causing server crashes
1443 - warnings and improved robustness wrt clockskew for certs
1444 - use the native daemon(3) to daemonize, when available
1445 - exit if bind() fails
1446 - exit if neither socksport nor orport is defined
1447 - include our own tor_timegm (Win32 doesn't have its own)
1448 - bugfix for win32 with lots of connections
1449 - fix minor bias in PRNG
1450 - make dirserver more robust to corrupt cached directory
1453 - Wrote the design document (woo)
1455 o Circuit building and exit policies:
1456 - Circuits no longer try to use nodes that the directory has told them
1458 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
1459 bitcounts (18.0.0.0/8).
1460 - Make AP connections standby for a circuit if no suitable circuit
1461 exists, rather than failing
1462 - Circuits choose exit node based on addr/port, exit policies, and
1463 which AP connections are standing by
1464 - Bump min pathlen from 2 to 3
1465 - Relay end cells have a payload to describe why the stream ended.
1466 - If the stream failed because of exit policy, try again with a new
1468 - Clients have a dns cache to remember resolved addresses.
1469 - Notice more quickly when we have no working circuits
1472 - APPort is now called SocksPort
1473 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
1475 - RecommendedVersions is now a config variable rather than
1476 hardcoded (for dirservers)
1477 - Reloads config on HUP
1478 - Usage info on -h or --help
1479 - If you set User and Group config vars, it'll setu/gid to them.
1481 Changes in version 0.0.2pre13 - 2003-10-19
1482 o General stability:
1483 - SSL_write no longer fails when it returns WANTWRITE and the number
1484 of bytes in the buf has changed by the next SSL_write call.
1485 - Fix segfault fetching directory when network is down
1486 - Fix a variety of minor memory leaks
1487 - Dirservers reload the fingerprints file on HUP, so I don't have
1488 to take down the network when I approve a new router
1489 - Default server config file has explicit Address line to specify fqdn
1492 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
1493 - Make listener connections not ever alloc bufs
1495 o Autoconf improvements:
1496 - don't clobber an external CFLAGS in ./configure
1497 - Make install now works
1498 - create var/lib/tor on make install
1499 - autocreate a tor.sh initscript to help distribs
1500 - autocreate the torrc and sample-server-torrc with correct paths
1502 o Log files and Daemonizing now work:
1503 - If --DebugLogFile is specified, log to it at -l debug
1504 - If --LogFile is specified, use it instead of commandline
1505 - If --RunAsDaemon is set, tor forks and backgrounds on startup