1 Changes in version 0.1.1.18-rc - 2006-04-10
3 - Work harder to download live network-statuses from all the
4 directory authorities we know about. Improve the threshold
5 decision logic so we're more robust to edge cases.
6 - When fetching rendezvous descriptors, we were willing to ask
7 v2 authorities too, which would always return 404.
10 - Stop listing down or invalid nodes in the v1 directory. This will
11 reduce its bulk by about 1/3, and reduce load on directory mirrors.
12 - When deciding whether a router is Fast or Guard-worthy, consider
13 his advertised BandwidthRate and not just the BandwidthCapacity.
14 - No longer ship INSTALL and README files -- they are useless now.
15 - Force rpmbuild to behave and honor target_cpu.
16 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
17 - Start to include translated versions of the tor-doc-*.html
18 files, along with the screenshots. Still needs more work.
19 - Start sending back 512 and 451 errors if mapaddress fails,
20 rather than not sending anything back at all.
21 - When we fail to bind or listen on an incoming or outgoing
22 socket, we should close it before failing. otherwise we just
23 leak it. (thanks to weasel for finding.)
24 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
25 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
26 - Make NoPublish (even though deprecated) work again.
27 - Fix a minor security flaw where a versioning auth dirserver
28 could list a recommended version many times in a row to make
29 clients more convinced that it's recommended.
30 - Fix crash bug if there are two unregistered servers running
31 with the same nickname, one of them is down, and you ask for
32 them by nickname in your EntryNodes or ExitNodes. Also, try
33 to pick the one that's running rather than an arbitrary one.
34 - Fix an infinite loop we could hit if we go offline for too long.
35 - Complain when we hit WSAENOBUFS on recv() or write() too.
36 Perhaps this will help us hunt the bug.
37 - If you're not a versioning dirserver, don't put the string
38 "client-versions \nserver-versions \n" in your network-status.
39 - Lower the minimum required number of file descriptors to 1000,
40 so we can have some overhead for Valgrind on Linux, where the
41 default ulimit -n is 1024.
44 - Add tor.dizum.com as the fifth authoritative directory server.
45 - Add a new config option FetchUselessDescriptors, off by default,
46 for when you plan to run "exitlist" on your client and you want
47 to know about even the non-running descriptors.
50 Changes in version 0.1.1.17-rc - 2006-03-28
52 - Clients and servers since 0.1.1.10-alpha have been expiring
53 connections whenever they are idle for 5 minutes and they *do*
54 have circuits on them. Oops. With this new version, clients will
55 discard their previous entry guard choices and avoid choosing
56 entry guards running these flawed versions.
57 - Fix memory leak when uncompressing concatenated zlib streams. This
58 was causing substantial leaks over time on Tor servers.
59 - The v1 directory was including servers as much as 48 hours old,
60 because that's how the new routerlist->routers works. Now only
61 include them if they're 20 hours old or less.
64 - Resume building on irix64, netbsd 2.0, etc.
65 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
67 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
68 and it is confusing some users.
69 - Mirrors stop caching the v1 directory so often.
70 - Make the max number of old descriptors that a cache will hold
71 rise with the number of directory authorities, so we can scale.
72 - Change our win32 uname() hack to be more forgiving about what
73 win32 versions it thinks it's found.
76 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
78 - When the controller's *setconf commands fail, collect an error
79 message in a string and hand it back to the controller.
80 - Make the v2 dir's "Fast" flag based on relative capacity, just
81 like "Stable" is based on median uptime. Name everything in the
82 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
83 - Log server fingerprint on startup, so new server operators don't
84 have to go hunting around their filesystem for it.
85 - Return a robots.txt on our dirport to discourage google indexing.
86 - Let the controller ask for GETINFO dir/status/foo so it can ask
87 directly rather than connecting to the dir port. Only works when
88 dirport is set for now.
90 o New config options rather than constants in the code:
91 - SocksTimeout: How long do we let a socks connection wait
92 unattached before we fail it?
93 - CircuitBuildTimeout: Cull non-open circuits that were born
94 at least this many seconds ago.
95 - CircuitIdleTimeout: Cull open clean circuits that were born
96 at least this many seconds ago.
99 Changes in version 0.1.1.16-rc - 2006-03-18
100 o Bugfixes on 0.1.1.15-rc:
101 - Fix assert when the controller asks to attachstream a connect-wait
102 or resolve-wait stream.
103 - Now do address rewriting when the controller asks us to attach
104 to a particular circuit too. This will let Blossom specify
105 "moria2.exit" without having to learn what moria2's IP address is.
106 - Make the "tor --verify-config" command-line work again, so people
107 can automatically check if their torrc will parse.
108 - Authoritative dirservers no longer require an open connection from
109 a server to consider him "reachable". We need this change because
110 when we add new auth dirservers, old servers won't know not to
112 - Let Tor build on Sun CC again.
113 - Fix an off-by-one buffer size in dirserv.c that magically never
114 hit our three authorities but broke sjmurdoch's own tor network.
115 - If we as a directory mirror don't know of any v1 directory
116 authorities, then don't try to cache any v1 directories.
117 - Stop warning about unknown servers in our family when they are
118 given as hex digests.
119 - Stop complaining as quickly to the server operator that he
120 hasn't registered his nickname/key binding.
121 - Various cleanups so we can add new V2 Auth Dirservers.
122 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
123 reflect the updated flags in our v2 dir protocol.
124 - Resume allowing non-printable characters for exit streams (both
125 for connecting and for resolving). Now we tolerate applications
126 that don't follow the RFCs. But continue to block malformed names
129 o Bugfixes on 0.1.0.x:
130 - Fix assert bug in close_logs(): when we close and delete logs,
131 remove them all from the global "logfiles" list.
132 - Fix minor integer overflow in calculating when we expect to use up
133 our bandwidth allocation before hibernating.
134 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
135 there are multiple SSLs installed with different versions.
136 - When we try to be a server and Address is not explicitly set and
137 our hostname resolves to a private IP address, try to use an
138 interface address if it has a public address. Now Windows machines
139 that think of themselves as localhost can work by default.
142 - Let the controller ask for GETINFO dir/server/foo so it can ask
143 directly rather than connecting to the dir port.
144 - Let the controller tell us about certain router descriptors
145 that it doesn't want Tor to use in circuits. Implement
146 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
147 - New config option SafeSocks to reject all application connections
148 using unsafe socks protocols. Defaults to off.
151 Changes in version 0.1.1.15-rc - 2006-03-11
152 o Bugfixes and cleanups:
153 - When we're printing strings from the network, don't try to print
154 non-printable characters. This protects us against shell escape
155 sequence exploits, and also against attacks to fool humans into
156 misreading their logs.
157 - Fix a bug where Tor would fail to establish any connections if you
158 left it off for 24 hours and then started it: we were happy with
159 the obsolete network statuses, but they all referred to router
160 descriptors that were too old to fetch, so we ended up with no
161 valid router descriptors.
162 - Fix a seg fault in the controller's "getinfo orconn-status" command
163 while listing status on incoming handshaking connections. Introduce
164 a status name "NEW" for these connections.
165 - If we get a linelist or linelist_s config option from the torrc
166 (e.g. ExitPolicy) and it has no value, warn and skip rather than
167 silently resetting it to its default.
168 - Don't abandon entry guards until they've been down or gone for
170 - Cleaner and quieter log messages.
173 - New controller signal NEWNYM that makes new application requests
175 - Add a new circuit purpose 'controller' to let the controller ask
176 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
177 controller command to let you specify the purpose if you're starting
178 a new circuit. Add a new SETCIRCUITPURPOSE controller command to
179 let you change a circuit's purpose after it's been created.
180 - Accept "private:*" in routerdesc exit policies; not generated yet
181 because older Tors do not understand it.
182 - Add BSD-style contributed startup script "rc.subr" from Peter
186 Changes in version 0.1.1.14-alpha - 2006-02-20
187 o Bugfixes on 0.1.1.x:
188 - Don't die if we ask for a stdout or stderr log (even implicitly)
189 and we're set to RunAsDaemon -- just warn.
190 - We still had a few bugs in the OR connection rotation code that
191 caused directory servers to slowly aggregate connections to other
192 fast Tor servers. This time for sure!
193 - Make log entries on Win32 include the name of the function again.
194 - We were treating a pair of exit policies if they were equal even
195 if one said accept and the other said reject -- causing us to
196 not always publish a new descriptor since we thought nothing
198 - Retry pending server downloads as well as pending networkstatus
199 downloads when we unexpectedly get a socks request.
200 - We were ignoring the IS_FAST flag in the directory status,
201 meaning we were willing to pick trivial-bandwidth nodes for "fast"
203 - If the controller's SAVECONF command fails (e.g. due to file
204 permissions), let the controller know that it failed.
207 - If we're trying to be a Tor server and running Windows 95/98/ME
208 as a server, explain that we'll likely crash.
209 - When we're a server, a client asks for an old-style directory,
210 and our write bucket is empty, don't give it to him. This way
211 small servers can continue to serve the directory *sometimes*,
212 without getting overloaded.
213 - Compress exit policies even more -- look for duplicate lines
215 - Clients now honor the "guard" flag in the router status when
216 picking entry guards, rather than looking at is_fast or is_stable.
217 - Retain unrecognized lines in $DATADIR/state file, so that we can
218 be forward-compatible.
219 - Generate 18.0.0.0/8 address policy format in descs when we can;
220 warn when the mask is not reducible to a bit-prefix.
221 - Let the user set ControlListenAddress in the torrc. This can be
222 dangerous, but there are some cases (like a secured LAN) where it
224 - Split ReachableAddresses into ReachableDirAddresses and
225 ReachableORAddresses, so we can restrict Dir conns to port 80
226 and OR conns to port 443.
227 - Now we can target arch and OS in rpm builds (contributed by
228 Phobos). Also make the resulting dist-rpm filename match the
230 - New config options to help controllers: FetchServerDescriptors
231 and FetchHidServDescriptors for whether to fetch server
232 info and hidserv info or let the controller do it, and
233 PublishServerDescriptor and PublishHidServDescriptors.
234 - Also let the controller set the __AllDirActionsPrivate config
235 option if you want all directory fetches/publishes to happen via
236 Tor (it assumes your controller bootstraps your circuits).
239 Changes in version 0.1.1.13-alpha - 2006-02-09
240 o Crashes in 0.1.1.x:
241 - When you tried to setconf ORPort via the controller, Tor would
242 crash. So people using TorCP to become a server were sad.
243 - Solve (I hope) the stack-smashing bug that we were seeing on fast
244 servers. The problem appears to be something do with OpenSSL's
245 random number generation, or how we call it, or something. Let me
246 know if the crashes continue.
247 - Turn crypto hardware acceleration off by default, until we find
248 somebody smart who can test it for us. (It appears to produce
249 seg faults in at least some cases.)
250 - Fix a rare assert error when we've tried all intro points for
251 a hidden service and we try fetching the service descriptor again:
252 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
255 - Fix a major load balance bug: we were round-robining in 16 KB
256 chunks, and servers with bandwidthrate of 20 KB, while downloading
257 a 600 KB directory, would starve their other connections. Now we
258 try to be a bit more fair.
259 - Dir authorities and mirrors were never expiring the newest
260 descriptor for each server, causing memory and directory bloat.
261 - Fix memory-bloating and connection-bloating bug on servers: We
262 were never closing any connection that had ever had a circuit on
263 it, because we were checking conn->n_circuits == 0, yet we had a
264 bug that let it go negative.
265 - Make Tor work using squid as your http proxy again -- squid
266 returns an error if you ask for a URL that's too long, and it uses
267 a really generic error message. Plus, many people are behind a
268 transparent squid so they don't even realize it.
269 - On platforms that don't have getrlimit (like Windows), we were
270 artificially constraining ourselves to a max of 1024
271 connections. Now just assume that we can handle as many as 15000
272 connections. Hopefully this won't cause other problems.
273 - Add a new config option ExitPolicyRejectPrivate which defaults to
274 1. This means all exit policies will begin with rejecting private
275 addresses, unless the server operator explicitly turns it off.
278 - Clients no longer download descriptors for non-running descriptors.
279 - Before we add new directory authorities, we should make it
280 clear that only v1 authorities should receive/publish hidden
284 - As soon as we've fetched some more directory info, immediately
285 try to download more server descriptors. This way we don't have
286 a 10 second pause during initial bootstrapping.
287 - Remove even more loud log messages that the server operator can't
289 - When we're running an obsolete or un-recommended version, make
290 the log message more clear about what the problem is and what
291 versions *are* still recommended.
292 - Provide a more useful warn message when our onion queue gets full:
293 the CPU is too slow or the exit policy is too liberal.
294 - Don't warn when we receive a 503 from a dirserver/cache -- this
295 will pave the way for them being able to refuse if they're busy.
296 - When we fail to bind a listener, try to provide a more useful
297 log message: e.g., "Is Tor already running?"
298 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
299 Goldberg can prove things about our handshake protocol more
301 - MaxConn has been obsolete for a while now. Document the ConnLimit
302 config option, which is a *minimum* number of file descriptors
303 that must be available else Tor refuses to start.
304 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
305 if you log to syslog and want something other than LOG_DAEMON.
306 - Make dirservers generate a separate "guard" flag to mean,
307 "would make a good entry guard". Make clients parse it and vote
308 on it. Not used by clients yet.
309 - Implement --with-libevent-dir option to ./configure. Also, improve
310 search techniques to find libevent, and use those for openssl too.
311 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
312 - Only start testing reachability once we've established a
313 circuit. This will make startup on dirservers less noisy.
314 - Don't try to upload hidden service descriptors until we have
315 established a circuit.
316 - Fix the controller's "attachstream 0" command to treat conn like
317 it just connected, doing address remapping, handling .exit and
318 .onion idioms, and so on. Now we're more uniform in making sure
319 that the controller hears about new and closing connections.
322 Changes in version 0.1.1.12-alpha - 2006-01-11
323 o Bugfixes on 0.1.1.x:
324 - The fix to close duplicate server connections was closing all
325 Tor client connections if they didn't establish a circuit
326 quickly enough. Oops.
327 - Fix minor memory issue (double-free) that happened on exit.
329 o Bugfixes on 0.1.0.x:
330 - Tor didn't warn when it failed to open a log file.
333 Changes in version 0.1.1.11-alpha - 2006-01-10
334 o Crashes in 0.1.1.x:
335 - Include all the assert/crash fixes from 0.1.0.16.
336 - If you start Tor and then quit very quickly, there were some
337 races that tried to free things that weren't allocated yet.
338 - Fix a rare memory stomp if you're running hidden services.
339 - Fix segfault when specifying DirServer in config without nickname.
340 - Fix a seg fault when you finish connecting to a server but at
341 that moment you dump his server descriptor.
342 - Extendcircuit and Attachstream controller commands would
343 assert/crash if you don't give them enough arguments.
344 - Fix an assert error when we're out of space in the connection_list
345 and we try to post a hidden service descriptor (reported by weasel).
346 - If you specify a relative torrc path and you set RunAsDaemon in
347 your torrc, then it chdir()'s to the new directory. If you HUP,
348 it tries to load the new torrc location, fails, and exits.
349 The fix: no longer allow a relative path to torrc using -f.
352 - Implement "entry guards": automatically choose a handful of entry
353 nodes and stick with them for all circuits. Only pick new guards
354 when the ones you have are unsuitable, and if the old guards
355 become suitable again, switch back. This will increase security
356 dramatically against certain end-point attacks. The EntryNodes
357 config option now provides some hints about which entry guards you
358 want to use most; and StrictEntryNodes means to only use those.
360 - New directory logic: download by descriptor digest, not by
361 fingerprint. Caches try to download all listed digests from
362 authorities; clients try to download "best" digests from caches.
363 This avoids partitioning and isolating attacks better.
364 - Make the "stable" router flag in network-status be the median of
365 the uptimes of running valid servers, and make clients pay
366 attention to the network-status flags. Thus the cutoff adapts
367 to the stability of the network as a whole, making IRC, IM, etc
368 connections more reliable.
371 - Tor servers with dynamic IP addresses were needing to wait 18
372 hours before they could start doing reachability testing using
373 the new IP address and ports. This is because they were using
374 the internal descriptor to learn what to test, yet they were only
375 rebuilding the descriptor once they decided they were reachable.
376 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
377 to download certain server descriptors, throw them away, and then
378 fetch them again after 30 minutes. Now mirrors throw away these
379 server descriptors so clients can't get them.
380 - We were leaving duplicate connections to other ORs open for a week,
381 rather than closing them once we detect a duplicate. This only
382 really affected authdirservers, but it affected them a lot.
383 - Spread the authdirservers' reachability testing over the entire
384 testing interval, so we don't try to do 500 TLS's at once every
388 - If the network is down, and we try to connect to a conn because
389 we have a circuit in mind, and we timeout (30 seconds) because the
390 network never answers, we were expiring the circuit, but we weren't
391 obsoleting the connection or telling the entry_guards functions.
392 - Some Tor servers process billions of cells per day. These statistics
393 need to be uint64_t's.
394 - Check for integer overflows in more places, when adding elements
395 to smartlists. This could possibly prevent a buffer overflow
396 on malicious huge inputs. I don't see any, but I haven't looked
398 - ReachableAddresses kept growing new "reject *:*" lines on every
400 - When you "setconf log" via the controller, it should remove all
401 logs. We were automatically adding back in a "log notice stdout".
402 - Newly bootstrapped Tor networks couldn't establish hidden service
403 circuits until they had nodes with high uptime. Be more tolerant.
404 - We were marking servers down when they could not answer every piece
405 of the directory request we sent them. This was far too harsh.
406 - Fix the torify (tsocks) config file to not use Tor for localhost
408 - Directory authorities now go to the proper authority when asking for
409 a networkstatus, even when they want a compressed one.
410 - Fix a harmless bug that was causing Tor servers to log
411 "Got an end because of misc error, but we're not an AP. Closing."
412 - Authorities were treating their own descriptor changes as cosmetic,
413 meaning the descriptor available in the network-status and the
414 descriptor that clients downloaded were different.
415 - The OS X installer was adding a symlink for tor_resolve but
416 the binary was called tor-resolve (reported by Thomas Hardly).
417 - Workaround a problem with some http proxies where they refuse GET
418 requests that specify "Content-Length: 0" (reported by Adrian).
419 - Fix wrong log message when you add a "HiddenServiceNodes" config
420 line without any HiddenServiceDir line (reported by Chris Thomas).
423 - Write the TorVersion into the state file so we have a prayer of
424 keeping forward and backward compatibility.
425 - Revive the FascistFirewall config option rather than eliminating it:
426 now it's a synonym for ReachableAddresses *:80,*:443.
427 - Clients choose directory servers from the network status lists,
428 not from their internal list of router descriptors. Now they can
429 go to caches directly rather than needing to go to authorities
431 - Directory authorities ignore router descriptors that have only
432 cosmetic differences: do this for 0.1.0.x servers now too.
433 - Add a new flag to network-status indicating whether the server
434 can answer v2 directory requests too.
435 - Authdirs now stop whining so loudly about bad descriptors that
436 they fetch from other dirservers. So when there's a log complaint,
437 it's for sure from a freshly uploaded descriptor.
438 - Reduce memory requirements in our structs by changing the order
440 - There used to be two ways to specify your listening ports in a
441 server descriptor: on the "router" line and with a separate "ports"
442 line. Remove support for the "ports" line.
443 - New config option "AuthDirRejectUnlisted" for auth dirservers as
444 a panic button: if we get flooded with unusable servers we can
445 revert to only listing servers in the approved-routers file.
446 - Auth dir servers can now mark a fingerprint as "!reject" or
447 "!invalid" in the approved-routers file (as its nickname), to
448 refuse descriptors outright or include them but marked as invalid.
449 - Servers store bandwidth history across restarts/crashes.
450 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
451 get a better idea of why their circuits failed. Not used yet.
452 - Directory mirrors now cache up to 16 unrecognized network-status
453 docs. Now we can add new authdirservers and they'll be cached too.
454 - When picking a random directory, prefer non-authorities if any
456 - New controller option "getinfo desc/all-recent" to fetch the
457 latest server descriptor for every router that Tor knows about.
460 Changes in version 0.1.1.10-alpha - 2005-12-11
461 o Correctness bugfixes on 0.1.0.x:
462 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
463 corrupting the heap, losing FDs, or crashing when we need to resize
464 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
465 - Stop doing the complex voodoo overkill checking for insecure
466 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
467 - When we were closing connections, there was a rare case that
468 stomped on memory, triggering seg faults and asserts.
469 - We were neglecting to unlink marked circuits from soon-to-close OR
470 connections, which caused some rare scribbling on freed memory.
471 - When we're deciding whether a stream has enough circuits around
472 that can handle it, count the freshly dirty ones and not the ones
473 that are so dirty they won't be able to handle it.
474 - Recover better from TCP connections to Tor servers that are
475 broken but don't tell you (it happens!); and rotate TLS
476 connections once a week.
477 - When we're expiring old circuits, we had a logic error that caused
478 us to close new rendezvous circuits rather than old ones.
479 - Fix a scary-looking but apparently harmless bug where circuits
480 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
481 servers, and never switch to state CIRCUIT_STATE_OPEN.
482 - When building with -static or on Solaris, we sometimes needed to
484 - Give a useful message when people run Tor as the wrong user,
485 rather than telling them to start chowning random directories.
486 - We were failing to inform the controller about new .onion streams.
488 o Security bugfixes on 0.1.0.x:
489 - Refuse server descriptors if the fingerprint line doesn't match
490 the included identity key. Tor doesn't care, but other apps (and
491 humans) might actually be trusting the fingerprint line.
492 - We used to kill the circuit when we receive a relay command we
493 don't recognize. Now we just drop it.
494 - Start obeying our firewall options more rigorously:
495 . If we can't get to a dirserver directly, try going via Tor.
496 . Don't ever try to connect (as a client) to a place our
497 firewall options forbid.
498 . If we specify a proxy and also firewall options, obey the
499 firewall options even when we're using the proxy: some proxies
500 can only proxy to certain destinations.
501 - Fix a bug found by Lasse Overlier: when we were making internal
502 circuits (intended to be cannibalized later for rendezvous and
503 introduction circuits), we were picking them so that they had
504 useful exit nodes. There was no need for this, and it actually
505 aids some statistical attacks.
506 - Start treating internal circuits and exit circuits separately.
507 It's important to keep them separate because internal circuits
508 have their last hops picked like middle hops, rather than like
509 exit hops. So exiting on them will break the user's expectations.
511 o Bugfixes on 0.1.1.x:
512 - Take out the mis-feature where we tried to detect IP address
513 flapping for people with DynDNS, and chose not to upload a new
514 server descriptor sometimes.
515 - Try to be compatible with OpenSSL 0.9.6 again.
516 - Log fix: when the controller is logging about .onion addresses,
517 sometimes it didn't include the ".onion" part of the address.
518 - Don't try to modify options->DirServers internally -- if the
519 user didn't specify any, just add the default ones directly to
520 the trusted dirserver list. This fixes a bug where people running
521 controllers would use SETCONF on some totally unrelated config
522 option, and Tor would start yelling at them about changing their
524 - Let the controller's redirectstream command specify a port, in
525 case the controller wants to change that too.
526 - When we requested a pile of server descriptors, we sometimes
527 accidentally launched a duplicate request for the first one.
528 - Bugfix for trackhostexits: write down the fingerprint of the
529 chosen exit, not its nickname, because the chosen exit might not
531 - When parsing foo.exit, if foo is unknown, and we are leaving
532 circuits unattached, set the chosen_exit field and leave the
533 address empty. This matters because controllers got confused
535 - Directory authorities no longer try to download server
536 descriptors that they know they will reject.
538 o Features and updates:
539 - Replace balanced trees with hash tables: this should make stuff
540 significantly faster.
541 - Resume using the AES counter-mode implementation that we ship,
542 rather than OpenSSL's. Ours is significantly faster.
543 - Many other CPU and memory improvements.
544 - Add a new config option FastFirstHopPK (on by default) so clients
545 do a trivial crypto handshake for their first hop, since TLS has
546 already taken care of confidentiality and authentication.
547 - Add a new config option TestSocks so people can see if their
548 applications are using socks4, socks4a, socks5-with-ip, or
549 socks5-with-hostname. This way they don't have to keep mucking
550 with tcpdump and wondering if something got cached somewhere.
551 - Warn when listening on a public address for socks. I suspect a
552 lot of people are setting themselves up as open socks proxies,
553 and they have no idea that jerks on the Internet are using them,
554 since they simply proxy the traffic into the Tor network.
555 - Add "private:*" as an alias in configuration for policies. Now
556 you can simplify your exit policy rather than needing to list
557 every single internal or nonroutable network space.
558 - Add a new controller event type that allows controllers to get
559 all server descriptors that were uploaded to a router in its role
560 as authoritative dirserver.
561 - Start shipping socks-extensions.txt, tor-doc-unix.html,
562 tor-doc-server.html, and stylesheet.css in the tarball.
563 - Stop shipping tor-doc.html in the tarball.
566 Changes in version 0.1.1.9-alpha - 2005-11-15
567 o Usability improvements:
568 - Start calling it FooListenAddress rather than FooBindAddress,
569 since few of our users know what it means to bind an address
571 - Reduce clutter in server logs. We're going to try to make
572 them actually usable now. New config option ProtocolWarnings that
573 lets you hear about how _other Tors_ are breaking the protocol. Off
575 - Divide log messages into logging domains. Once we put some sort
576 of interface on this, it will let people looking at more verbose
577 log levels specify the topics they want to hear more about.
578 - Make directory servers return better http 404 error messages
579 instead of a generic "Servers unavailable".
580 - Check for even more Windows version flags when writing the platform
581 string in server descriptors, and note any we don't recognize.
582 - Clean up more of the OpenSSL memory when exiting, so we can detect
584 - Make directory authorities be non-versioning, non-naming by
585 default. Now we can add new directory servers without requiring
586 their operators to pay close attention.
587 - When logging via syslog, include the pid whenever we provide
588 a log entry. Suggested by Todd Fries.
590 o Performance improvements:
591 - Directory servers now silently throw away new descriptors that
592 haven't changed much if the timestamps are similar. We do this to
593 tolerate older Tor servers that upload a new descriptor every 15
594 minutes. (It seemed like a good idea at the time.)
595 - Inline bottleneck smartlist functions; use fast versions by default.
596 - Add a "Map from digest to void*" abstraction digestmap_t so we
597 can do less hex encoding/decoding. Use it in router_get_by_digest()
598 to resolve a performance bottleneck.
599 - Allow tor_gzip_uncompress to extract as much as possible from
600 truncated compressed data. Try to extract as many
601 descriptors as possible from truncated http responses (when
602 DIR_PURPOSE_FETCH_ROUTERDESC).
603 - Make circ->onionskin a pointer, not a static array. moria2 was using
604 125000 circuit_t's after it had been up for a few weeks, which
605 translates to 20+ megs of wasted space.
606 - The private half of our EDH handshake keys are now chosen out
607 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
609 o Security improvements:
610 - Start making directory caches retain old routerinfos, so soon
611 clients can start asking by digest of descriptor rather than by
612 fingerprint of server.
613 - Add half our entropy from RAND_poll in OpenSSL. This knows how
614 to use egd (if present), openbsd weirdness (if present), vms/os2
615 weirdness (if we ever port there), and more in the future.
617 o Bugfixes on 0.1.0.x:
618 - Do round-robin writes of at most 16 kB per write. This might be
619 more fair on loaded Tor servers, and it might resolve our Windows
620 crash bug. It might also slow things down.
621 - Our TLS handshakes were generating a single public/private
622 keypair for the TLS context, rather than making a new one for
623 each new connections. Oops. (But we were still rotating them
624 periodically, so it's not so bad.)
625 - When we were cannibalizing a circuit with a particular exit
626 node in mind, we weren't checking to see if that exit node was
627 already present earlier in the circuit. Oops.
628 - When a Tor server's IP changes (e.g. from a dyndns address),
629 upload a new descriptor so clients will learn too.
630 - Really busy servers were keeping enough circuits open on stable
631 connections that they were wrapping around the circuit_id
632 space. (It's only two bytes.) This exposed a bug where we would
633 feel free to reuse a circuit_id even if it still exists but has
634 been marked for close. Try to fix this bug. Some bug remains.
635 - If we would close a stream early (e.g. it asks for a .exit that
636 we know would refuse it) but the LeaveStreamsUnattached config
637 option is set by the controller, then don't close it.
639 o Bugfixes on 0.1.1.8-alpha:
640 - Fix a big pile of memory leaks, some of them serious.
641 - Do not try to download a routerdesc if we would immediately reject
643 - Resume inserting a newline between all router descriptors when
644 generating (old style) signed directories, since our spec says
646 - When providing content-type application/octet-stream for
647 server descriptors using .z, we were leaving out the
648 content-encoding header. Oops. (Everything tolerated this just
649 fine, but that doesn't mean we need to be part of the problem.)
650 - Fix a potential seg fault in getconf and getinfo using version 1
651 of the controller protocol.
652 - Avoid crash: do not check whether DirPort is reachable when we
653 are suppressing it because of hibernation.
654 - Make --hash-password not crash on exit.
657 Changes in version 0.1.1.8-alpha - 2005-10-07
658 o New features (major):
659 - Clients don't download or use the directory anymore. Now they
660 download and use network-statuses from the trusted dirservers,
661 and fetch individual server descriptors as needed from mirrors.
662 See dir-spec.txt for all the gory details.
663 - Be more conservative about whether to advertise our DirPort.
664 The main change is to not advertise if we're running at capacity
665 and either a) we could hibernate or b) our capacity is low and
666 we're using a default DirPort.
667 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
669 o New features (minor):
670 - Try to be smart about when to retry network-status and
671 server-descriptor fetches. Still needs some tuning.
672 - Stop parsing, storing, or using running-routers output (but
673 mirrors still cache and serve it).
674 - Consider a threshold of versioning dirservers (dirservers who have
675 an opinion about which Tor versions are still recommended) before
676 deciding whether to warn the user that he's obsolete.
677 - Dirservers can now reject/invalidate by key and IP, with the
678 config options "AuthDirInvalid" and "AuthDirReject". This is
679 useful since currently we automatically list servers as running
680 and usable even if we know they're jerks.
681 - Provide dire warnings to any users who set DirServer; move it out
682 of torrc.sample and into torrc.complete.
683 - Add MyFamily to torrc.sample in the server section.
684 - Add nicknames to the DirServer line, so we can refer to them
685 without requiring all our users to memorize their IP addresses.
686 - When we get an EOF or a timeout on a directory connection, note
687 how many bytes of serverdesc we are dropping. This will help
688 us determine whether it is smart to parse incomplete serverdesc
690 - Add a new function to "change pseudonyms" -- that is, to stop
691 using any currently-dirty circuits for new streams, so we don't
692 link new actions to old actions. Currently it's only called on
693 HUP (or SIGNAL RELOAD).
694 - On sighup, if UseHelperNodes changed to 1, use new circuits.
695 - Start using RAND_bytes rather than RAND_pseudo_bytes from
696 OpenSSL. Also, reseed our entropy every hour, not just at
697 startup. And entropy in 512-bit chunks, not 160-bit chunks.
699 o Fixes on 0.1.1.7-alpha:
700 - Nobody ever implemented EVENT_ADDRMAP for control protocol
701 version 0, so don't let version 0 controllers ask for it.
702 - If you requested something with too many newlines via the
703 v1 controller protocol, you could crash tor.
704 - Fix a number of memory leaks, including some pretty serious ones.
705 - Re-enable DirPort testing again, so Tor servers will be willing
706 to advertise their DirPort if it's reachable.
707 - On TLS handshake, only check the other router's nickname against
708 its expected nickname if is_named is set.
710 o Fixes forward-ported from 0.1.0.15:
711 - Don't crash when we don't have any spare file descriptors and we
712 try to spawn a dns or cpu worker.
713 - Make the numbers in read-history and write-history into uint64s,
714 so they don't overflow and publish negatives in the descriptor.
717 - For the OS X package's modified privoxy config file, comment
718 out the "logfile" line so we don't log everything passed
720 - We were whining about using socks4 or socks5-with-local-lookup
721 even when it's an IP in the "virtual" range we designed exactly
723 - We were leaking some memory every time the client changes IPs.
724 - Never call free() on tor_malloc()d memory. This will help us
725 use dmalloc to detect memory leaks.
726 - Check for named servers when looking them up by nickname;
727 warn when we'recalling a non-named server by its nickname;
728 don't warn twice about the same name.
729 - Try to list MyFamily elements by key, not by nickname, and warn
730 if we've not heard of the server.
731 - Make windows platform detection (uname equivalent) smarter.
732 - It turns out sparc64 doesn't like unaligned access either.
735 Changes in version 0.1.1.7-alpha - 2005-09-14
736 o Fixes on 0.1.1.6-alpha:
737 - Exit servers were crashing when people asked them to make a
738 connection to an address not in their exit policy.
739 - Looking up a non-existent stream for a v1 control connection would
741 - Fix a seg fault if we ask a dirserver for a descriptor by
742 fingerprint but he doesn't know about him.
743 - SETCONF was appending items to linelists, not clearing them.
744 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
745 out and refuse the setconf if it would fail.
746 - Downgrade the dirserver log messages when whining about
750 - Add Peter Palfrader's check-tor script to tor/contrib/
751 It lets you easily check whether a given server (referenced by
752 nickname) is reachable by you.
753 - Numerous changes to move towards client-side v2 directories. Not
757 - If the user gave tor an odd number of command-line arguments,
758 we were silently ignoring the last one. Now we complain and fail.
759 [This wins the oldest-bug prize -- this bug has been present since
760 November 2002, as released in Tor 0.0.0.]
761 - Do not use unaligned memory access on alpha, mips, or mipsel.
762 It *works*, but is very slow, so we treat them as if it doesn't.
763 - Retry directory requests if we fail to get an answer we like
764 from a given dirserver (we were retrying before, but only if
766 - When writing the RecommendedVersions line, sort them first.
767 - When the client asked for a rendezvous port that the hidden
768 service didn't want to provide, we were sending an IP address
769 back along with the end cell. Fortunately, it was zero. But stop
771 - Correct "your server is reachable" log entries to indicate that
772 it was self-testing that told us so.
775 Changes in version 0.1.1.6-alpha - 2005-09-09
776 o Fixes on 0.1.1.5-alpha:
777 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
778 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
779 - Fix bug with tor_memmem finding a match at the end of the string.
780 - Make unit tests run without segfaulting.
781 - Resolve some solaris x86 compile warnings.
782 - Handle duplicate lines in approved-routers files without warning.
783 - Fix bug where as soon as a server refused any requests due to his
784 exit policy (e.g. when we ask for localhost and he tells us that's
785 127.0.0.1 and he won't do it), we decided he wasn't obeying his
786 exit policy and stopped using him for any exits.
787 - Only do openssl hardware accelerator stuff if openssl version is
790 o New controller features/fixes:
791 - Add a "RESETCONF" command so you can set config options like
792 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
793 a config option in the torrc with no value, then it clears it
794 entirely (rather than setting it to its default).
795 - Add a "GETINFO config-file" to tell us where torrc is.
796 - Avoid sending blank lines when GETINFO replies should be empty.
797 - Add a QUIT command for the controller (for using it manually).
798 - Fix a bug in SAVECONF that was adding default dirservers and
799 other redundant entries to the torrc file.
801 o Start on the new directory design:
802 - Generate, publish, cache, serve new network-status format.
803 - Publish individual descriptors (by fingerprint, by "all", and by
805 - Publish client and server recommended versions separately.
806 - Allow tor_gzip_uncompress() to handle multiple concatenated
807 compressed strings. Serve compressed groups of router
808 descriptors. The compression logic here could be more
810 - Distinguish v1 authorities (all currently trusted directories)
811 from v2 authorities (all trusted directories).
812 - Change DirServers config line to note which dirs are v1 authorities.
813 - Add configuration option "V1AuthoritativeDirectory 1" which
814 moria1, moria2, and tor26 should set.
815 - Remove option when getting directory cache to see whether they
816 support running-routers; they all do now. Replace it with one
817 to see whether caches support v2 stuff.
820 - Dirservers now do their own external reachability testing of each
821 Tor server, and only list them as running if they've been found to
822 be reachable. We also send back warnings to the server's logs if
823 it uploads a descriptor that we already believe is unreachable.
824 - Implement exit enclaves: if we know an IP address for the
825 destination, and there's a running Tor server at that address
826 which allows exit to the destination, then extend the circuit to
827 that exit first. This provides end-to-end encryption and end-to-end
828 authentication. Also, if the user wants a .exit address or enclave,
829 use 4 hops rather than 3, and cannibalize a general circ for it
831 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
832 controller. Also, rotate dns and cpu workers if the controller
833 changes options that will affect them; and initialize the dns
834 worker cache tree whether or not we start out as a server.
835 - Only upload a new server descriptor when options change, 18
836 hours have passed, uptime is reset, or bandwidth changes a lot.
837 - Check [X-]Forwarded-For headers in HTTP requests when generating
838 log messages. This lets people run dirservers (and caches) behind
839 Apache but still know which IP addresses are causing warnings.
841 o Config option changes:
842 - Replace (Fascist)Firewall* config options with a new
843 ReachableAddresses option that understands address policies.
844 For example, "ReachableAddresses *:80,*:443"
845 - Get rid of IgnoreVersion undocumented config option, and make us
846 only warn, never exit, when we're running an obsolete version.
847 - Make MonthlyAccountingStart config option truly obsolete now.
850 - Reject ports 465 and 587 in the default exit policy, since
851 people have started using them for spam too.
852 - It turns out we couldn't bootstrap a network since we added
853 reachability detection in 0.1.0.1-rc. Good thing the Tor network
854 has never gone down. Add an AssumeReachable config option to let
855 servers and dirservers bootstrap. When we're trying to build a
856 high-uptime or high-bandwidth circuit but there aren't enough
857 suitable servers, try being less picky rather than simply failing.
858 - Our logic to decide if the OR we connected to was the right guy
859 was brittle and maybe open to a mitm for unverified routers.
860 - We weren't cannibalizing circuits correctly for
861 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
862 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
863 build those from scratch. This should make hidden services faster.
864 - Predict required circuits better, with an eye toward making hidden
865 services faster on the service end.
866 - Retry streams if the exit node sends back a 'misc' failure. This
867 should result in fewer random failures. Also, after failing
868 from resolve failed or misc, reset the num failures, so we give
869 it a fair shake next time we try.
870 - Clean up the rendezvous warn log msgs, and downgrade some to info.
871 - Reduce severity on logs about dns worker spawning and culling.
872 - When we're shutting down and we do something like try to post a
873 server descriptor or rendezvous descriptor, don't complain that
874 we seem to be unreachable. Of course we are, we're shutting down.
875 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
876 We don't use them yet, but maybe one day our DNS resolver will be
877 able to discover them.
878 - Make ContactInfo mandatory for authoritative directory servers.
879 - Require server descriptors to list IPv4 addresses -- hostnames
880 are no longer allowed. This also fixes some potential security
881 problems with people providing hostnames as their address and then
882 preferentially resolving them to partition users.
883 - Change log line for unreachability to explicitly suggest /etc/hosts
884 as the culprit. Also make it clearer what IP address and ports we're
885 testing for reachability.
886 - Put quotes around user-supplied strings when logging so users are
887 more likely to realize if they add bad characters (like quotes)
889 - Let auth dir servers start without specifying an Address config
891 - Make unit tests (and other invocations that aren't the real Tor)
892 run without launching listeners, creating subdirectories, and so on.
895 Changes in version 0.1.1.5-alpha - 2005-08-08
896 o Bugfixes included in 0.1.0.14.
898 o Bugfixes on 0.1.0.x:
899 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
900 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
901 it would silently using ignore the 6668.
904 Changes in version 0.1.1.4-alpha - 2005-08-04
905 o Bugfixes included in 0.1.0.13.
908 - Improve tor_gettimeofday() granularity on windows.
909 - Make clients regenerate their keys when their IP address changes.
910 - Implement some more GETINFO goodness: expose helper nodes, config
911 options, getinfo keys.
914 Changes in version 0.1.1.3-alpha - 2005-07-25
915 o Bugfixes on 0.1.1.2-alpha:
916 - Fix a bug in handling the controller's "post descriptor"
918 - Fix several bugs in handling the controller's "extend circuit"
920 - Fix a bug in handling the controller's "stream status" event.
921 - Fix an assert failure if we have a controller listening for
922 circuit events and we go offline.
923 - Re-allow hidden service descriptors to publish 0 intro points.
924 - Fix a crash when generating your hidden service descriptor if
925 you don't have enough intro points already.
927 o New features on 0.1.1.2-alpha:
928 - New controller function "getinfo accounting", to ask how
929 many bytes we've used in this time period.
930 - Experimental support for helper nodes: a lot of the risk from
931 a small static adversary comes because users pick new random
932 nodes every time they rebuild a circuit. Now users will try to
933 stick to the same small set of entry nodes if they can. Not
934 enabled by default yet.
936 o Bugfixes on 0.1.0.12:
937 - If you're an auth dir server, always publish your dirport,
938 even if you haven't yet found yourself to be reachable.
939 - Fix a size_t underflow in smartlist_join_strings2() that made
940 it do bad things when you hand it an empty smartlist.
943 Changes in version 0.1.1.2-alpha - 2005-07-14
944 o New directory servers:
945 - tor26 has changed IP address.
947 o Bugfixes on 0.1.0.x, crashes/leaks:
948 - Port the servers-not-obeying-their-exit-policies fix from 0.1.0.11.
949 - Fix an fd leak in start_daemon().
950 - On Windows, you can't always reopen a port right after you've
951 closed it. So change retry_listeners() to only close and re-open
952 ports that have changed.
953 - Fix a possible double-free in tor_gzip_uncompress().
955 o Bugfixes on 0.1.0.x, usability:
956 - When tor_socketpair() fails in Windows, give a reasonable
957 Windows-style errno back.
958 - Let people type "tor --install" as well as "tor -install" when they
959 want to make it an NT service.
960 - NT service patch from Matt Edman to improve error messages.
961 - When the controller asks for a config option with an abbreviated
962 name, give the full name in our response.
963 - Correct the man page entry on TrackHostExitsExpire.
964 - Looks like we were never delivering deflated (i.e. compressed)
965 running-routers lists, even when asked. Oops.
966 - When --disable-threads is set, do not search for or link against
969 o Bugfixes on 0.1.1.x:
970 - Fix a seg fault with autodetecting which controller version is
974 - New hidden service descriptor format: put a version in it, and
975 let people specify introduction/rendezvous points that aren't
976 in "the directory" (which is subjective anyway).
977 - Allow the DEBUG controller event to work again. Mark certain log
978 entries as "don't tell this to controllers", so we avoid cycles.
981 Changes in version 0.1.1.1-alpha - 2005-06-29
983 - Make OS X init script check for missing argument, so we don't
984 confuse users who invoke it incorrectly.
985 - Fix a seg fault in "tor --hash-password foo".
986 - Fix a possible way to DoS dirservers.
987 - When we complain that your exit policy implicitly allows local or
988 private address spaces, name them explicitly so operators can
990 - Make the log message less scary when all the dirservers are
991 temporarily unreachable.
992 - We were printing the number of idle dns workers incorrectly when
996 - Revised controller protocol (version 1) that uses ascii rather
997 than binary. Add supporting libraries in python and java so you
998 can use the controller from your applications without caring how
1000 - Spiffy new support for crypto hardware accelerators. Can somebody
1004 Changes in version 0.1.0.17 - 2006-02-17
1005 o Crash bugfixes on 0.1.0.x:
1006 - When servers with a non-zero DirPort came out of hibernation,
1007 sometimes they would trigger an assert.
1009 o Other important bugfixes:
1010 - On platforms that don't have getrlimit (like Windows), we were
1011 artificially constraining ourselves to a max of 1024
1012 connections. Now just assume that we can handle as many as 15000
1013 connections. Hopefully this won't cause other problems.
1015 o Backported features:
1016 - When we're a server, a client asks for an old-style directory,
1017 and our write bucket is empty, don't give it to him. This way
1018 small servers can continue to serve the directory *sometimes*,
1019 without getting overloaded.
1020 - Whenever you get a 503 in response to a directory fetch, try
1021 once more. This will become important once servers start sending
1022 503's whenever they feel busy.
1023 - Fetch a new directory every 120 minutes, not every 40 minutes.
1024 Now that we have hundreds of thousands of users running the old
1025 directory algorithm, it's starting to hurt a lot.
1026 - Bump up the period for forcing a hidden service descriptor upload
1027 from 20 minutes to 1 hour.
1030 Changes in version 0.1.0.16 - 2006-01-02
1031 o Crash bugfixes on 0.1.0.x:
1032 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
1033 corrupting the heap, losing FDs, or crashing when we need to resize
1034 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
1035 - It turns out sparc64 platforms crash on unaligned memory access
1036 too -- so detect and avoid this.
1037 - Handle truncated compressed data correctly (by detecting it and
1039 - Fix possible-but-unlikely free(NULL) in control.c.
1040 - When we were closing connections, there was a rare case that
1041 stomped on memory, triggering seg faults and asserts.
1042 - Avoid potential infinite recursion when building a descriptor. (We
1043 don't know that it ever happened, but better to fix it anyway.)
1044 - We were neglecting to unlink marked circuits from soon-to-close OR
1045 connections, which caused some rare scribbling on freed memory.
1046 - Fix a memory stomping race bug when closing the joining point of two
1047 rendezvous circuits.
1048 - Fix an assert in time parsing found by Steven Murdoch.
1050 o Other bugfixes on 0.1.0.x:
1051 - When we're doing reachability testing, provide more useful log
1052 messages so the operator knows what to expect.
1053 - Do not check whether DirPort is reachable when we are suppressing
1054 advertising it because of hibernation.
1055 - When building with -static or on Solaris, we sometimes needed -ldl.
1056 - One of the dirservers (tor26) changed its IP address.
1057 - When we're deciding whether a stream has enough circuits around
1058 that can handle it, count the freshly dirty ones and not the ones
1059 that are so dirty they won't be able to handle it.
1060 - When we're expiring old circuits, we had a logic error that caused
1061 us to close new rendezvous circuits rather than old ones.
1062 - Give a more helpful log message when you try to change ORPort via
1063 the controller: you should upgrade Tor if you want that to work.
1064 - We were failing to parse Tor versions that start with "Tor ".
1065 - Tolerate faulty streams better: when a stream fails for reason
1066 exitpolicy, stop assuming that the router is lying about his exit
1067 policy. When a stream fails for reason misc, allow it to retry just
1068 as if it was resolvefailed. When a stream has failed three times,
1069 reset its failure count so we can try again and get all three tries.
1072 Changes in version 0.1.0.15 - 2005-09-23
1073 o Bugfixes on 0.1.0.x:
1074 - Reject ports 465 and 587 (spam targets) in default exit policy.
1075 - Don't crash when we don't have any spare file descriptors and we
1076 try to spawn a dns or cpu worker.
1077 - Get rid of IgnoreVersion undocumented config option, and make us
1078 only warn, never exit, when we're running an obsolete version.
1079 - Don't try to print a null string when your server finds itself to
1080 be unreachable and the Address config option is empty.
1081 - Make the numbers in read-history and write-history into uint64s,
1082 so they don't overflow and publish negatives in the descriptor.
1083 - Fix a minor memory leak in smartlist_string_remove().
1084 - We were only allowing ourselves to upload a server descriptor at
1085 most every 20 minutes, even if it changed earlier than that.
1086 - Clean up log entries that pointed to old URLs.
1089 Changes in version 0.1.0.14 - 2005-08-08
1090 o Bugfixes on 0.1.0.x:
1091 - Fix the other half of the bug with crypto handshakes
1093 - Fix an assert trigger if you send a 'signal term' via the
1094 controller when it's listening for 'event info' messages.
1097 Changes in version 0.1.0.13 - 2005-08-04
1098 o Bugfixes on 0.1.0.x:
1099 - Fix a critical bug in the security of our crypto handshakes.
1100 - Fix a size_t underflow in smartlist_join_strings2() that made
1101 it do bad things when you hand it an empty smartlist.
1102 - Fix Windows installer to ship Tor license (thanks to Aphex for
1103 pointing out this oversight) and put a link to the doc directory
1105 - Explicitly set no-unaligned-access for sparc: it turns out the
1106 new gcc's let you compile broken code, but that doesn't make it
1110 Changes in version 0.1.0.12 - 2005-07-18
1111 o New directory servers:
1112 - tor26 has changed IP address.
1114 o Bugfixes on 0.1.0.x:
1115 - Fix a possible double-free in tor_gzip_uncompress().
1116 - When --disable-threads is set, do not search for or link against
1118 - Don't trigger an assert if an authoritative directory server
1119 claims its dirport is 0.
1120 - Fix bug with removing Tor as an NT service: some people were
1121 getting "The service did not return an error." Thanks to Matt
1125 Changes in version 0.1.0.11 - 2005-06-30
1126 o Bugfixes on 0.1.0.x:
1127 - Fix major security bug: servers were disregarding their
1128 exit policies if clients behaved unexpectedly.
1129 - Make OS X init script check for missing argument, so we don't
1130 confuse users who invoke it incorrectly.
1131 - Fix a seg fault in "tor --hash-password foo".
1132 - The MAPADDRESS control command was broken.
1135 Changes in version 0.1.0.10 - 2005-06-14
1137 - Make NT services work and start on startup on Win32 (based on
1138 patch by Matt Edman). See the FAQ entry for details.
1139 - Make 'platform' string in descriptor more accurate for Win32
1140 servers, so it's not just "unknown platform".
1141 - REUSEADDR on normal platforms means you can rebind to the port
1142 right after somebody else has let it go. But REUSEADDR on Win32
1143 means you can bind to the port _even when somebody else already
1144 has it bound_! So, don't do that on Win32.
1145 - Clean up the log messages when starting on Win32 with no config
1147 - Allow seeding the RNG on Win32 even when you're not running as
1148 Administrator. If seeding the RNG on Win32 fails, quit.
1150 o Assert / crash bugs:
1151 - Refuse relay cells that claim to have a length larger than the
1152 maximum allowed. This prevents a potential attack that could read
1153 arbitrary memory (e.g. keys) from an exit server's process
1155 - If unofficial Tor clients connect and send weird TLS certs, our
1156 Tor server triggers an assert. Stop asserting, and start handling
1157 TLS errors better in other situations too.
1158 - Fix a race condition that can trigger an assert when we have a
1159 pending create cell and an OR connection attempt fails.
1162 - Use pthreads for worker processes rather than forking. This was
1163 forced because when we forked, we ended up wasting a lot of
1164 duplicate ram over time.
1165 - Also switch to foo_r versions of some library calls to allow
1166 reentry and threadsafeness.
1167 - Implement --disable-threads configure option. Disable threads on
1168 netbsd and openbsd by default, because they have no reentrant
1169 resolver functions (!), and on solaris since it has other
1171 - Fix possible bug on threading platforms (e.g. win32) which was
1172 leaking a file descriptor whenever a cpuworker or dnsworker died.
1173 - Fix a minor memory leak when somebody establishes an introduction
1174 point at your Tor server.
1175 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1177 - Add ./configure --with-dmalloc option, to track memory leaks.
1178 - And try to free all memory on closing, so we can detect what
1181 o Protocol correctness:
1182 - When we've connected to an OR and handshaked but didn't like
1183 the result, we were closing the conn without sending destroy
1184 cells back for pending circuits. Now send those destroys.
1185 - Start sending 'truncated' cells back rather than destroy cells
1186 if the circuit closes in front of you. This means we won't have
1187 to abandon partially built circuits.
1188 - Handle changed router status correctly when dirserver reloads
1189 fingerprint file. We used to be dropping all unverified descriptors
1190 right then. The bug was hidden because we would immediately
1191 fetch a directory from another dirserver, which would include the
1192 descriptors we just dropped.
1193 - Revise tor-spec to add more/better stream end reasons.
1194 - Revise all calls to connection_edge_end to avoid sending 'misc',
1195 and to take errno into account where possible.
1196 - Client now retries when streams end early for 'hibernating' or
1197 'resource limit' reasons, rather than failing them.
1198 - Try to be more zealous about calling connection_edge_end when
1199 things go bad with edge conns in connection.c.
1201 o Robustness improvements:
1202 - Better handling for heterogeneous / unreliable nodes:
1203 - Annotate circuits with whether they aim to contain high uptime
1204 nodes and/or high capacity nodes. When building circuits, choose
1206 - This means that every single node in an intro rend circuit,
1207 not just the last one, will have a minimum uptime.
1208 - New config option LongLivedPorts to indicate application streams
1209 that will want high uptime circuits.
1210 - Servers reset uptime when a dir fetch entirely fails. This
1211 hopefully reflects stability of the server's network connectivity.
1212 - If somebody starts his tor server in Jan 2004 and then fixes his
1213 clock, don't make his published uptime be a year.
1214 - Reset published uptime when we wake up from hibernation.
1215 - Introduce a notion of 'internal' circs, which are chosen without
1216 regard to the exit policy of the last hop. Intro and rendezvous
1217 circs must be internal circs, to avoid leaking information. Resolve
1218 and connect streams can use internal circs if they want.
1219 - New circuit pooling algorithm: keep track of what destination ports
1220 we've used recently (start out assuming we'll want to use 80), and
1221 make sure to have enough circs around to satisfy these ports. Also
1222 make sure to have 2 internal circs around if we've required internal
1223 circs lately (and with high uptime if we've seen that lately too).
1224 - Turn addr_policy_compare from a tristate to a quadstate; this should
1225 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1226 for google.com" problem.
1227 - When a client asks us for a dir mirror and we don't have one,
1228 launch an attempt to get a fresh one.
1229 - First cut at support for "create-fast" cells. Clients can use
1230 these when extending to their first hop, since the TLS already
1231 provides forward secrecy and authentication. Not enabled on
1234 o Reachability testing.
1235 - Your Tor server will automatically try to see if its ORPort and
1236 DirPort are reachable from the outside, and it won't upload its
1237 descriptor until it decides at least ORPort is reachable (when
1238 DirPort is not yet found reachable, publish it as zero).
1239 - When building testing circs for ORPort testing, use only
1240 high-bandwidth nodes, so fewer circuits fail.
1241 - Notice when our IP changes, and reset stats/uptime/reachability.
1242 - Authdirservers don't do ORPort reachability detection, since
1243 they're in clique mode, so it will be rare to find a server not
1244 already connected to them.
1245 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1249 - Now we allow two unverified servers with the same nickname
1250 but different keys. But if a nickname is verified, only that
1251 nickname+key are allowed.
1252 - If you're an authdirserver connecting to an address:port,
1253 and it's not the OR you were expecting, forget about that
1254 descriptor. If he *was* the one you were expecting, then forget
1255 about all other descriptors for that address:port.
1256 - Allow servers to publish descriptors from 12 hours in the future.
1257 Corollary: only whine about clock skew from the dirserver if
1258 he's a trusted dirserver (since now even verified servers could
1259 have quite wrong clocks).
1260 - Require servers that use the default dirservers to have public IP
1261 addresses. We have too many servers that are configured with private
1262 IPs and their admins never notice the log entries complaining that
1263 their descriptors are being rejected.
1265 o Efficiency improvements:
1266 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1267 and /dev/poll), and hopefully work better on Windows too.
1268 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1269 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1270 - Find libevent even if it's hiding in /usr/local/ and your
1271 CFLAGS and LDFLAGS don't tell you to look there.
1272 - Be able to link with libevent as a shared library (the default
1273 after 1.0d), even if it's hiding in /usr/local/lib and even
1274 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1275 assuming you're running gcc. Otherwise fail and give a useful
1277 - Switch to a new buffer management algorithm, which tries to avoid
1278 reallocing and copying quite as much. In first tests it looks like
1279 it uses *more* memory on average, but less cpu.
1280 - Switch our internal buffers implementation to use a ring buffer,
1281 to hopefully improve performance for fast servers a lot.
1282 - Reenable the part of the code that tries to flush as soon as an
1283 OR outbuf has a full TLS record available. Perhaps this will make
1284 OR outbufs not grow as huge except in rare cases, thus saving lots
1285 of CPU time plus memory.
1286 - Improve performance for dirservers: stop re-parsing the whole
1287 directory every time you regenerate it.
1288 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1289 it much faster to look up a circuit for each relay cell.
1290 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1291 since they're eating our cpu on exit nodes.
1292 - Stop wasting time doing a case insensitive comparison for every
1293 dns name every time we do any lookup. Canonicalize the names to
1294 lowercase when you first see them.
1297 - Handle unavailable hidden services better. Handle slow or busy
1298 hidden services better.
1299 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1300 circ as necessary, if there are any completed ones lying around
1301 when we try to launch one.
1302 - Make hidden services try to establish a rendezvous for 30 seconds
1303 after fetching the descriptor, rather than for n (where n=3)
1304 attempts to build a circuit.
1305 - Adjust maximum skew and age for rendezvous descriptors: let skew
1306 be 48 hours rather than 90 minutes.
1307 - Reject malformed .onion addresses rather then passing them on as
1308 normal web requests.
1311 - More Tor controller support. See
1312 http://tor.eff.org/doc/control-spec.txt for all the new features,
1313 including signals to emulate unix signals from any platform;
1314 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1315 closestream; closecircuit; etc.
1316 - Encode hashed controller passwords in hex instead of base64,
1317 to make it easier to write controllers.
1318 - Revise control spec and implementation to allow all log messages to
1319 be sent to controller with their severities intact (suggested by
1320 Matt Edman). Disable debug-level logs while delivering a debug-level
1321 log to the controller, to prevent loop. Update TorControl to handle
1322 new log event types.
1324 o New config options/defaults:
1325 - Begin scrubbing sensitive strings from logs by default. Turn off
1326 the config option SafeLogging if you need to do debugging.
1327 - New exit policy: accept most low-numbered ports, rather than
1328 rejecting most low-numbered ports.
1329 - Put a note in the torrc about abuse potential with the default
1331 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1333 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1334 based on patch from Adam Langley (basic auth only).
1335 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1336 the fast servers that have been joining lately. (Clients are now
1337 willing to load balance over up to 2 MB of advertised bandwidth
1339 - New config option MaxAdvertisedBandwidth which lets you advertise
1340 a low bandwidthrate (to not attract as many circuits) while still
1341 allowing a higher bandwidthrate in reality.
1342 - Require BandwidthRate to be at least 20kB/s for servers.
1343 - Add a NoPublish config option, so you can be a server (e.g. for
1344 testing running Tor servers in other Tor networks) without
1345 publishing your descriptor to the primary dirservers.
1346 - Add a new AddressMap config directive to rewrite incoming socks
1347 addresses. This lets you, for example, declare an implicit
1348 required exit node for certain sites.
1349 - Add a new TrackHostExits config directive to trigger addressmaps
1350 for certain incoming socks addresses -- for sites that break when
1351 your exit keeps changing (based on patch from Mike Perry).
1352 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1353 which describes how often we retry making new circuits if current
1354 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1355 how long we're willing to make use of an already-dirty circuit.
1356 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1357 a config option "ShutdownWaitLength" (when using kill -INT on
1359 - Fix an edge case in parsing config options: if they say "--"
1360 on the commandline, it's not a config option (thanks weasel).
1361 - New config option DirAllowPrivateAddresses for authdirservers.
1362 Now by default they refuse router descriptors that have non-IP or
1363 private-IP addresses.
1364 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1365 smart" default value: low for servers and high for clients.
1366 - Some people were putting "Address " in their torrc, and they had
1367 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1368 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1369 LOCALSTATEDIR/tor instead.
1370 - Implement --verify-config command-line option to check if your torrc
1371 is valid without actually launching Tor.
1373 o Logging improvements:
1374 - When dirservers refuse a server descriptor, we now log its
1375 contactinfo, platform, and the poster's IP address.
1376 - Only warn once per nickname from add_nickname_list_to_smartlist()
1377 per failure, so an entrynode or exitnode choice that's down won't
1379 - When we're connecting to an OR and he's got a different nickname/key
1380 than we were expecting, only complain loudly if we're an OP or a
1381 dirserver. Complaining loudly to the OR admins just confuses them.
1382 - Whine at you if you're a server and you don't set your contactinfo.
1383 - Warn when exit policy implicitly allows local addresses.
1384 - Give a better warning when some other server advertises an
1385 ORPort that is actually an apache running ssl.
1386 - If we get an incredibly skewed timestamp from a dirserver mirror
1387 that isn't a verified OR, don't warn -- it's probably him that's
1389 - When a dirserver causes you to give a warn, mention which dirserver
1391 - Initialize libevent later in the startup process, so the logs are
1392 already established by the time we start logging libevent warns.
1393 - Use correct errno on win32 if libevent fails.
1394 - Check and warn about known-bad/slow libevent versions.
1395 - Stop warning about sigpipes in the logs. We're going to
1396 pretend that getting these occassionally is normal and fine.
1398 o New contrib scripts:
1399 - New experimental script tor/contrib/exitlist: a simple python
1400 script to parse directories and find Tor nodes that exit to listed
1402 - New experimental script tor/contrib/ExerciseServer.py (needs more
1403 work) that uses the controller interface to build circuits and
1404 fetch pages over them. This will help us bootstrap servers that
1405 have lots of capacity but haven't noticed it yet.
1406 - New experimental script tor/contrib/PathDemo.py (needs more work)
1407 that uses the controller interface to let you choose whole paths
1409 "<hostname>.<path,separated by dots>.<length of path>.path"
1410 - New contributed script "privoxy-tor-toggle" to toggle whether
1411 Privoxy uses Tor. Seems to be configured for Debian by default.
1412 - Have torctl.in/tor.sh.in check for location of su binary (needed
1416 - chdir() to your datadirectory at the *end* of the daemonize process,
1417 not the beginning. This was a problem because the first time you
1418 run tor, if your datadir isn't there, and you have runasdaemon set
1419 to 1, it will try to chdir to it before it tries to create it. Oops.
1420 - Fix several double-mark-for-close bugs, e.g. where we were finding
1421 a conn for a cell even if that conn is already marked for close.
1422 - Stop most cases of hanging up on a socks connection without sending
1424 - Fix a bug in the RPM package: set home directory for _tor to
1425 something more reasonable when first installing.
1426 - Stop putting nodename in the Platform string in server descriptors.
1427 It doesn't actually help, and it is confusing/upsetting some people.
1428 - When using preferred entry or exit nodes, ignore whether the
1429 circuit wants uptime or capacity. They asked for the nodes, they
1431 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1432 artificially capped at 500kB.
1433 - Cache local dns resolves correctly even when they're .exit
1435 - If we're hibernating and we get a SIGINT, exit immediately.
1436 - tor-resolve requests were ignoring .exit if there was a working circuit
1437 they could use instead.
1438 - Pay more attention to the ClientOnly config option.
1439 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1440 installer screens; and don't put stuff into StartupItems unless
1441 the user asks you to.
1444 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1445 rather than just rejecting it.
1446 - If our clock jumps forward by 100 seconds or more, assume something
1447 has gone wrong with our network and abandon all not-yet-used circs.
1448 - When an application is using socks5, give him the whole variety of
1449 potential socks5 responses (connect refused, host unreachable, etc),
1450 rather than just "success" or "failure".
1451 - A more sane version numbering system. See
1452 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1453 - Change version parsing logic: a version is "obsolete" if it is not
1454 recommended and (1) there is a newer recommended version in the
1455 same series, or (2) there are no recommended versions in the same
1456 series, but there are some recommended versions in a newer series.
1457 A version is "new" if it is newer than any recommended version in
1459 - Report HTTP reasons to client when getting a response from directory
1460 servers -- so you can actually know what went wrong.
1461 - Reject odd-looking addresses at the client (e.g. addresses that
1462 contain a colon), rather than having the server drop them because
1464 - Stop publishing socksport in the directory, since it's not
1465 actually meant to be public. For compatibility, publish a 0 there
1467 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1468 cookies to disk and doesn't log each web request to disk. (Thanks
1469 to Brett Carrington for pointing this out.)
1470 - Add OSX uninstall instructions. An actual uninstall script will
1472 - Add "opt hibernating 1" to server descriptor to make it clearer
1473 whether the server is hibernating.
1476 Changes in version 0.0.9.10 - 2005-06-16
1477 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1478 - Refuse relay cells that claim to have a length larger than the
1479 maximum allowed. This prevents a potential attack that could read
1480 arbitrary memory (e.g. keys) from an exit server's process
1484 Changes in version 0.0.9.9 - 2005-04-23
1485 o Bugfixes on 0.0.9.x:
1486 - If unofficial Tor clients connect and send weird TLS certs, our
1487 Tor server triggers an assert. This release contains a minimal
1488 backport from the broader fix that we put into 0.1.0.4-rc.
1491 Changes in version 0.0.9.8 - 2005-04-07
1492 o Bugfixes on 0.0.9.x:
1493 - We have a bug that I haven't found yet. Sometimes, very rarely,
1494 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1495 thinks of itself as idle. This meant that no new circuits ever got
1496 established. Here's a workaround to kill any cpuworker that's been
1497 busy for more than 100 seconds.
1500 Changes in version 0.0.9.7 - 2005-04-01
1501 o Bugfixes on 0.0.9.x:
1502 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1503 - Compare identity to identity, not to nickname, when extending to
1504 a router not already in the directory. This was preventing us from
1505 extending to unknown routers. Oops.
1506 - Make sure to create OS X Tor user in <500 range, so we aren't
1507 creating actual system users.
1508 - Note where connection-that-hasn't-sent-end was marked, and fix
1509 a few really loud instances of this harmless bug (it's fixed more
1513 Changes in version 0.0.9.6 - 2005-03-24
1514 o Bugfixes on 0.0.9.x (crashes and asserts):
1515 - Add new end stream reasons to maintainance branch. Fix bug where
1516 reason (8) could trigger an assert. Prevent bug from recurring.
1517 - Apparently win32 stat wants paths to not end with a slash.
1518 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1519 blowing away the circuit that conn->cpath_layer points to, then
1520 checking to see if the circ is well-formed. Backport check to make
1521 sure we dont use the cpath on a closed connection.
1522 - Prevent circuit_resume_edge_reading_helper() from trying to package
1523 inbufs for marked-for-close streams.
1524 - Don't crash on hup if your options->address has become unresolvable.
1525 - Some systems (like OS X) sometimes accept() a connection and tell
1526 you the remote host is 0.0.0.0:0. If this happens, due to some
1527 other mis-features, we get confused; so refuse the conn for now.
1529 o Bugfixes on 0.0.9.x (other):
1530 - Fix harmless but scary "Unrecognized content encoding" warn message.
1531 - Add new stream error reason: TORPROTOCOL reason means "you are not
1532 speaking a version of Tor I understand; say bye-bye to your stream."
1533 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1534 into the future, now that we are more tolerant of skew. This
1535 resolves a bug where a Tor server would refuse to cache a directory
1536 because all the directories it gets are too far in the future;
1537 yet the Tor server never logs any complaints about clock skew.
1538 - Mac packaging magic: make man pages useable, and do not overwrite
1539 existing torrc files.
1540 - Make OS X log happily to /var/log/tor/tor.log
1543 Changes in version 0.0.9.5 - 2005-02-22
1544 o Bugfixes on 0.0.9.x:
1545 - Fix an assert race at exit nodes when resolve requests fail.
1546 - Stop picking unverified dir mirrors--it only leads to misery.
1547 - Patch from Matt Edman to make NT services work better. Service
1548 support is still not compiled into the executable by default.
1549 - Patch from Dmitri Bely so the Tor service runs better under
1550 the win32 SYSTEM account.
1551 - Make tor-resolve actually work (?) on Win32.
1552 - Fix a sign bug when getrlimit claims to have 4+ billion
1553 file descriptors available.
1554 - Stop refusing to start when bandwidthburst == bandwidthrate.
1555 - When create cells have been on the onion queue more than five
1556 seconds, just send back a destroy and take them off the list.
1559 Changes in version 0.0.9.4 - 2005-02-03
1560 o Bugfixes on 0.0.9:
1561 - Fix an assert bug that took down most of our servers: when
1562 a server claims to have 1 GB of bandwidthburst, don't
1564 - Don't crash as badly if we have spawned the max allowed number
1565 of dnsworkers, or we're out of file descriptors.
1566 - Block more file-sharing ports in the default exit policy.
1567 - MaxConn is now automatically set to the hard limit of max
1568 file descriptors we're allowed (ulimit -n), minus a few for
1570 - Give a clearer message when servers need to raise their
1571 ulimit -n when they start running out of file descriptors.
1572 - SGI Compatibility patches from Jan Schaumann.
1573 - Tolerate a corrupt cached directory better.
1574 - When a dirserver hasn't approved your server, list which one.
1575 - Go into soft hibernation after 95% of the bandwidth is used,
1576 not 99%. This is especially important for daily hibernators who
1577 have a small accounting max. Hopefully it will result in fewer
1578 cut connections when the hard hibernation starts.
1579 - Load-balance better when using servers that claim more than
1580 800kB/s of capacity.
1581 - Make NT services work (experimental, only used if compiled in).
1584 Changes in version 0.0.9.3 - 2005-01-21
1585 o Bugfixes on 0.0.9:
1586 - Backport the cpu use fixes from main branch, so busy servers won't
1587 need as much processor time.
1588 - Work better when we go offline and then come back, or when we
1589 run Tor at boot before the network is up. We do this by
1590 optimistically trying to fetch a new directory whenever an
1591 application request comes in and we think we're offline -- the
1592 human is hopefully a good measure of when the network is back.
1593 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1594 long as you keep using them; actually publish hidserv descriptors
1595 shortly after they change, rather than waiting 20-40 minutes.
1596 - Enable Mac startup script by default.
1597 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1598 - When you update AllowUnverifiedNodes or FirewallPorts via the
1599 controller's setconf feature, we were always appending, never
1601 - When you update HiddenServiceDir via setconf, it was screwing up
1602 the order of reading the lines, making it fail.
1603 - Do not rewrite a cached directory back to the cache; otherwise we
1604 will think it is recent and not fetch a newer one on startup.
1605 - Workaround for webservers that lie about Content-Encoding: Tor
1606 now tries to autodetect compressed directories and compression
1607 itself. This lets us Proxypass dir fetches through apache.
1610 Changes in version 0.0.9.2 - 2005-01-04
1611 o Bugfixes on 0.0.9 (crashes and asserts):
1612 - Fix an assert on startup when the disk is full and you're logging
1614 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
1615 style address, then we'd crash.
1616 - Fix an assert trigger when the running-routers string we get from
1617 a dirserver is broken.
1618 - Make worker threads start and run on win32. Now win32 servers
1620 - Bandaid (not actually fix, but now it doesn't crash) an assert
1621 where the dns worker dies mysteriously and the main Tor process
1622 doesn't remember anything about the address it was resolving.
1624 o Bugfixes on 0.0.9 (Win32):
1625 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
1626 name out of the warning/assert messages.
1627 - Fix a superficial "unhandled error on read" bug on win32.
1628 - The win32 installer no longer requires a click-through for our
1629 license, since our Free Software license grants rights but does not
1631 - Win32: When connecting to a dirserver fails, try another one
1632 immediately. (This was already working for non-win32 Tors.)
1633 - Stop trying to parse $HOME on win32 when hunting for default
1635 - Make tor-resolve.c work on win32 by calling network_init().
1637 o Bugfixes on 0.0.9 (other):
1638 - Make 0.0.9.x build on Solaris again.
1639 - Due to a fencepost error, we were blowing away the \n when reporting
1640 confvalue items in the controller. So asking for multiple config
1641 values at once couldn't work.
1642 - When listing circuits that are pending on an opening OR connection,
1643 if we're an OR we were listing circuits that *end* at us as
1644 being pending on every listener, dns/cpu worker, etc. Stop that.
1645 - Dirservers were failing to create 'running-routers' or 'directory'
1646 strings if we had more than some threshold of routers. Fix them so
1647 they can handle any number of routers.
1648 - Fix a superficial "Duplicate mark for close" bug.
1649 - Stop checking for clock skew for OR connections, even for servers.
1650 - Fix a fencepost error that was chopping off the last letter of any
1651 nickname that is the maximum allowed nickname length.
1652 - Update URLs in log messages so they point to the new website.
1653 - Fix a potential problem in mangling server private keys while
1654 writing to disk (not triggered yet, as far as we know).
1655 - Include the licenses for other free software we include in Tor,
1656 now that we're shipping binary distributions more regularly.
1659 Changes in version 0.0.9.1 - 2004-12-15
1660 o Bugfixes on 0.0.9:
1661 - Make hibernation actually work.
1662 - Make HashedControlPassword config option work.
1663 - When we're reporting event circuit status to a controller,
1664 don't use the stream status code.
1667 Changes in version 0.0.9 - 2004-12-12
1668 o Bugfixes on 0.0.8.1 (Crashes and asserts):
1669 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
1670 write() call will fail and we handle it there.
1671 - When we run out of disk space, or other log writing error, don't
1672 crash. Just stop logging to that log and continue.
1673 - Fix isspace() and friends so they still make Solaris happy
1674 but also so they don't trigger asserts on win32.
1675 - Fix assert failure on malformed socks4a requests.
1676 - Fix an assert bug where a hidden service provider would fail if
1677 the first hop of his rendezvous circuit was down.
1678 - Better handling of size_t vs int, so we're more robust on 64
1681 o Bugfixes on 0.0.8.1 (Win32):
1682 - Make windows sockets actually non-blocking (oops), and handle
1683 win32 socket errors better.
1684 - Fix parse_iso_time on platforms without strptime (eg win32).
1685 - win32: when being multithreaded, leave parent fdarray open.
1686 - Better handling of winsock includes on non-MSV win32 compilers.
1687 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
1689 - Make unit tests work on win32.
1691 o Bugfixes on 0.0.8.1 (Path selection and streams):
1692 - Calculate timeout for waiting for a connected cell from the time
1693 we sent the begin cell, not from the time the stream started. If
1694 it took a long time to establish the circuit, we would time out
1695 right after sending the begin cell.
1696 - Fix router_compare_addr_to_addr_policy: it was not treating a port
1697 of * as always matching, so we were picking reject *:* nodes as
1698 exit nodes too. Oops.
1699 - When read() failed on a stream, we would close it without sending
1700 back an end. So 'connection refused' would simply be ignored and
1701 the user would get no response.
1702 - Stop a sigpipe: when an 'end' cell races with eof from the app,
1703 we shouldn't hold-open-until-flush if the eof arrived first.
1704 - Let resolve conns retry/expire also, rather than sticking around
1706 - Fix more dns related bugs: send back resolve_failed and end cells
1707 more reliably when the resolve fails, rather than closing the
1708 circuit and then trying to send the cell. Also attach dummy resolve
1709 connections to a circuit *before* calling dns_resolve(), to fix
1710 a bug where cached answers would never be sent in RESOLVED cells.
1712 o Bugfixes on 0.0.8.1 (Circuits):
1713 - Finally fix a bug that's been plaguing us for a year:
1714 With high load, circuit package window was reaching 0. Whenever
1715 we got a circuit-level sendme, we were reading a lot on each
1716 socket, but only writing out a bit. So we would eventually reach
1717 eof. This would be noticed and acted on even when there were still
1718 bytes sitting in the inbuf.
1719 - Use identity comparison, not nickname comparison, to choose which
1720 half of circuit-ID-space each side gets to use. This is needed
1721 because sometimes we think of a router as a nickname, and sometimes
1722 as a hex ID, and we can't predict what the other side will do.
1724 o Bugfixes on 0.0.8.1 (Other):
1725 - Fix a whole slew of memory leaks.
1726 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
1727 - If we are using select, make sure we stay within FD_SETSIZE.
1728 - When poll() is interrupted, we shouldn't believe the revents values.
1729 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
1730 and smartlist_len, which are two major profiling offenders.
1731 - If do_hup fails, actually notice.
1732 - Flush the log file descriptor after we print "Tor opening log file",
1733 so we don't see those messages days later.
1734 - Hidden service operators now correctly handle version 1 style
1735 INTRODUCE1 cells (nobody generates them still, so not a critical
1737 - Handle more errnos from accept() without closing the listener.
1738 Some OpenBSD machines were closing their listeners because
1739 they ran out of file descriptors.
1740 - Some people had wrapped their tor client/server in a script
1741 that would restart it whenever it died. This did not play well
1742 with our "shut down if your version is obsolete" code. Now people
1743 don't fetch a new directory if their local cached version is
1745 - Make our autogen.sh work on ksh as well as bash.
1746 - Better torrc example lines for dirbindaddress and orbindaddress.
1747 - Improved bounds checking on parsed ints (e.g. config options and
1748 the ones we find in directories.)
1749 - Stop using separate defaults for no-config-file and
1750 empty-config-file. Now you have to explicitly turn off SocksPort,
1751 if you don't want it open.
1752 - We were starting to daemonize before we opened our logs, so if
1753 there were any problems opening logs, we would complain to stderr,
1754 which wouldn't work, and then mysteriously exit.
1755 - If a verified OR connects to us before he's uploaded his descriptor,
1756 or we verify him and hup but he still has the original TLS
1757 connection, then conn->nickname is still set like he's unverified.
1759 o Code security improvements, inspired by Ilja:
1760 - tor_snprintf wrapper over snprintf with consistent (though not C99)
1762 - Replace sprintf with tor_snprintf. (I think they were all safe, but
1764 - Replace strcpy/strncpy with strlcpy in more places.
1765 - Avoid strcat; use tor_snprintf or strlcat instead.
1767 o Features (circuits and streams):
1768 - New circuit building strategy: keep a list of ports that we've
1769 used in the past 6 hours, and always try to have 2 circuits open
1770 or on the way that will handle each such port. Seed us with port
1771 80 so web users won't complain that Tor is "slow to start up".
1772 - Make kill -USR1 dump more useful stats about circuits.
1773 - When warning about retrying or giving up, print the address, so
1774 the user knows which one it's talking about.
1775 - If you haven't used a clean circuit in an hour, throw it away,
1776 just to be on the safe side. (This means after 6 hours a totally
1777 unused Tor client will have no circuits open.)
1778 - Support "foo.nickname.exit" addresses, to let Alice request the
1779 address "foo" as viewed by exit node "nickname". Based on a patch
1781 - If your requested entry or exit node has advertised bandwidth 0,
1783 - Be more greedy about filling up relay cells -- we try reading again
1784 once we've processed the stuff we read, in case enough has arrived
1785 to fill the last cell completely.
1786 - Refuse application socks connections to port 0.
1787 - Use only 0.0.9pre1 and later servers for resolve cells.
1789 o Features (bandwidth):
1790 - Hibernation: New config option "AccountingMax" lets you
1791 set how many bytes per month (in each direction) you want to
1792 allow your server to consume. Rather than spreading those
1793 bytes out evenly over the month, we instead hibernate for some
1794 of the month and pop up at a deterministic time, work until
1795 the bytes are consumed, then hibernate again. Config option
1796 "MonthlyAccountingStart" lets you specify which day of the month
1797 your billing cycle starts on.
1798 - Implement weekly/monthly/daily accounting: now you specify your
1799 hibernation properties by
1800 AccountingMax N bytes|KB|MB|GB|TB
1801 AccountingStart day|week|month [day] HH:MM
1802 Defaults to "month 1 0:00".
1803 - Let bandwidth and interval config options be specified as 5 bytes,
1804 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
1806 o Features (directories):
1807 - New "router-status" line in directory, to better bind each verified
1808 nickname to its identity key.
1809 - Clients can ask dirservers for /dir.z to get a compressed version
1810 of the directory. Only works for servers running 0.0.9, of course.
1811 - Make clients cache directories and use them to seed their router
1812 lists at startup. This means clients have a datadir again.
1813 - Respond to content-encoding headers by trying to uncompress as
1815 - Clients and servers now fetch running-routers; cache
1816 running-routers; compress running-routers; serve compressed
1818 - Make moria2 advertise a dirport of 80, so people behind firewalls
1819 will be able to get a directory.
1820 - Http proxy support
1821 - Dirservers translate requests for http://%s:%d/x to /x
1822 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
1823 be routed through this host.
1824 - Clients ask for /tor/x rather than /x for new enough dirservers.
1825 This way we can one day coexist peacefully with apache.
1826 - Clients specify a "Host: %s%d" http header, to be compatible
1827 with more proxies, and so running squid on an exit node can work.
1828 - Protect dirservers from overzealous descriptor uploading -- wait
1829 10 seconds after directory gets dirty, before regenerating.
1831 o Features (packages and install):
1832 - Add NSI installer contributed by J Doe.
1833 - Apply NT service patch from Osamu Fujino. Still needs more work.
1834 - Commit VC6 and VC7 workspace/project files.
1835 - Commit a tor.spec for making RPM files, with help from jbash.
1836 - Add contrib/torctl.in contributed by Glenn Fink.
1837 - Make expand_filename handle ~ and ~username.
1838 - Use autoconf to enable largefile support where necessary. Use
1839 ftello where available, since ftell can fail at 2GB.
1840 - Ship src/win32/ in the tarball, so people can use it to build.
1841 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
1844 o Features (ui controller):
1845 - Control interface: a separate program can now talk to your
1846 client/server over a socket, and get/set config options, receive
1847 notifications of circuits and streams starting/finishing/dying,
1848 bandwidth used, etc. The next step is to get some GUIs working.
1849 Let us know if you want to help out. See doc/control-spec.txt .
1850 - Ship a contrib/tor-control.py as an example script to interact
1851 with the control port.
1852 - "tor --hash-password zzyxz" will output a salted password for
1853 use in authenticating to the control interface.
1854 - Implement the control-spec's SAVECONF command, to write your
1855 configuration to torrc.
1856 - Get cookie authentication for the controller closer to working.
1857 - When set_conf changes our server descriptor, upload a new copy.
1858 But don't upload it too often if there are frequent changes.
1860 o Features (config and command-line):
1861 - Deprecate unofficial config option abbreviations, and abbreviations
1862 not on the command line.
1863 - Configuration infrastructure support for warning on obsolete
1865 - Give a slightly more useful output for "tor -h".
1866 - Break DirFetchPostPeriod into:
1867 - DirFetchPeriod for fetching full directory,
1868 - StatusFetchPeriod for fetching running-routers,
1869 - DirPostPeriod for posting server descriptor,
1870 - RendPostPeriod for posting hidden service descriptors.
1871 - New log format in config:
1872 "Log minsev[-maxsev] stdout|stderr|syslog" or
1873 "Log minsev[-maxsev] file /var/foo"
1874 - DirPolicy config option, to let people reject incoming addresses
1875 from their dirserver.
1876 - "tor --list-fingerprint" will list your identity key fingerprint
1878 - Make tor --version --version dump the cvs Id of every file.
1879 - New 'MyFamily nick1,...' config option for a server to
1880 specify other servers that shouldn't be used in the same circuit
1881 with it. Only believed if nick1 also specifies us.
1882 - New 'NodeFamily nick1,nick2,...' config option for a client to
1883 specify nodes that it doesn't want to use in the same circuit.
1884 - New 'Redirectexit pattern address:port' config option for a
1885 server to redirect exit connections, e.g. to a local squid.
1886 - Add "pass" target for RedirectExit, to make it easier to break
1887 out of a sequence of RedirectExit rules.
1888 - Make the dirservers file obsolete.
1889 - Include a dir-signing-key token in directories to tell the
1890 parsing entity which key is being used to sign.
1891 - Remove the built-in bulky default dirservers string.
1892 - New config option "Dirserver %s:%d [fingerprint]", which can be
1893 repeated as many times as needed. If no dirservers specified,
1894 default to moria1,moria2,tor26.
1895 - Make 'Routerfile' config option obsolete.
1896 - Discourage people from setting their dirfetchpostperiod more often
1897 than once per minute.
1900 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
1901 get back to normal.)
1902 - Accept *:706 (silc) in default exit policy.
1903 - Implement new versioning format for post 0.1.
1904 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
1905 log more informatively.
1906 - Check clock skew for verified servers, but allow unverified
1907 servers and clients to have any clock skew.
1908 - Make sure the hidden service descriptors are at a random offset
1909 from each other, to hinder linkability.
1910 - Clients now generate a TLS cert too, in preparation for having
1911 them act more like real nodes.
1912 - Add a pure-C tor-resolve implementation.
1913 - Use getrlimit and friends to ensure we can reach MaxConn (currently
1914 1024) file descriptors.
1915 - Raise the max dns workers from 50 to 100.
1918 Changes in version 0.0.8.1 - 2004-10-13
1920 - Fix a seg fault that can be triggered remotely for Tor
1921 clients/servers with an open dirport.
1922 - Fix a rare assert trigger, where routerinfos for entries in
1923 our cpath would expire while we're building the path.
1924 - Fix a bug in OutboundBindAddress so it (hopefully) works.
1925 - Fix a rare seg fault for people running hidden services on
1926 intermittent connections.
1927 - Fix a bug in parsing opt keywords with objects.
1928 - Fix a stale pointer assert bug when a stream detaches and
1930 - Fix a string format vulnerability (probably not exploitable)
1931 in reporting stats locally.
1932 - Fix an assert trigger: sometimes launching circuits can fail
1933 immediately, e.g. because too many circuits have failed recently.
1934 - Fix a compile warning on 64 bit platforms.
1937 Changes in version 0.0.8 - 2004-08-25
1939 - Made our unit tests compile again on OpenBSD 3.5, and tor
1940 itself compile again on OpenBSD on a sparc64.
1941 - We were neglecting milliseconds when logging on win32, so
1942 everything appeared to happen at the beginning of each second.
1943 - Check directory signature _before_ you decide whether you're
1944 you're running an obsolete version and should exit.
1945 - Check directory signature _before_ you parse the running-routers
1946 list to decide who's running.
1947 - Check return value of fclose while writing to disk, so we don't
1948 end up with broken files when servers run out of disk space.
1949 - Port it to SunOS 5.9 / Athena
1950 - Fix two bugs in saving onion keys to disk when rotating, so
1951 hopefully we'll get fewer people using old onion keys.
1952 - Remove our mostly unused -- and broken -- hex_encode()
1953 function. Use base16_encode() instead. (Thanks to Timo Lindfors
1954 for pointing out this bug.)
1955 - Only pick and establish intro points after we've gotten a
1957 - Fix assert triggers: if the other side returns an address 0.0.0.0,
1958 don't put it into the client dns cache.
1959 - If a begin failed due to exit policy, but we believe the IP
1960 address should have been allowed, switch that router to exitpolicy
1961 reject *:* until we get our next directory.
1964 - 'Extend' relay cell payloads now include the digest of the
1965 intended next hop's identity key. Now we can verify that we're
1966 extending to the right router, and also extend to routers we
1967 hadn't heard of before.
1970 - Tor nodes can now act as relays (with an advertised ORPort)
1971 without being manually verified by the dirserver operators.
1972 - Uploaded descriptors of unverified routers are now accepted
1973 by the dirservers, and included in the directory.
1974 - Verified routers are listed by nickname in the running-routers
1975 list; unverified routers are listed as "$<fingerprint>".
1976 - We now use hash-of-identity-key in most places rather than
1977 nickname or addr:port, for improved security/flexibility.
1978 - AllowUnverifiedNodes config option to let circuits choose no-name
1979 routers in entry,middle,exit,introduction,rendezvous positions.
1980 Allow middle and rendezvous positions by default.
1981 - When picking unverified routers, skip those with low uptime and/or
1982 low bandwidth, depending on what properties you care about.
1983 - ClientOnly option for nodes that never want to become servers.
1984 - Directory caching.
1985 - "AuthoritativeDir 1" option for the official dirservers.
1986 - Now other nodes (clients and servers) will cache the latest
1987 directory they've pulled down.
1988 - They can enable their DirPort to serve it to others.
1989 - Clients will pull down a directory from any node with an open
1990 DirPort, and check the signature/timestamp correctly.
1991 - Authoritative dirservers now fetch directories from other
1992 authdirservers, to stay better synced.
1993 - Running-routers list tells who's down also, along with noting
1994 if they're verified (listed by nickname) or unverified (listed
1996 - Allow dirservers to serve running-router list separately.
1997 This isn't used yet.
1998 - You can now fetch $DIRURL/running-routers to get just the
1999 running-routers line, not the whole descriptor list. (But
2000 clients don't use this yet.)
2001 - Clients choose nodes proportional to advertised bandwidth.
2002 - Clients avoid using nodes with low uptime as introduction points.
2003 - Handle servers with dynamic IP addresses: don't just replace
2004 options->Address with the resolved one at startup, and
2005 detect our address right before we make a routerinfo each time.
2006 - 'FascistFirewall' option to pick dirservers and ORs on specific
2007 ports; plus 'FirewallPorts' config option to tell FascistFirewall
2008 which ports are open. (Defaults to 80,443)
2009 - Try other dirservers immediately if the one you try is down. This
2010 should tolerate down dirservers better now.
2011 - ORs connect-on-demand to other ORs
2012 - If you get an extend cell to an OR you're not connected to,
2013 connect, handshake, and forward the create cell.
2014 - The authoritative dirservers stay connected to everybody,
2015 and everybody stays connected to 0.0.7 servers, but otherwise
2016 clients/servers expire unused connections after 5 minutes.
2017 - When servers get a sigint, they delay 30 seconds (refusing new
2018 connections) then exit. A second sigint causes immediate exit.
2019 - File and name management:
2020 - Look for .torrc if no CONFDIR "torrc" is found.
2021 - If no datadir is defined, then choose, make, and secure ~/.tor
2023 - If torrc not found, exitpolicy reject *:*.
2024 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
2025 - If no nickname is defined, derive default from hostname.
2026 - Rename secret key files, e.g. identity.key -> secret_id_key,
2027 to discourage people from mailing their identity key to tor-ops.
2028 - Refuse to build a circuit before the directory has arrived --
2029 it won't work anyway, since you won't know the right onion keys
2031 - Parse tor version numbers so we can do an is-newer-than check
2032 rather than an is-in-the-list check.
2033 - New socks command 'resolve', to let us shim gethostbyname()
2035 - A 'tor_resolve' script to access the socks resolve functionality.
2036 - A new socks-extensions.txt doc file to describe our
2037 interpretation and extensions to the socks protocols.
2038 - Add a ContactInfo option, which gets published in descriptor.
2039 - Write tor version at the top of each log file
2040 - New docs in the tarball:
2042 - Document that you should proxy your SSL traffic too.
2043 - Log a warning if the user uses an unsafe socks variant, so people
2044 are more likely to learn about privoxy or socat.
2045 - Log a warning if you're running an unverified server, to let you
2046 know you might want to get it verified.
2047 - Change the default exit policy to reject the default edonkey,
2048 kazaa, gnutella ports.
2049 - Add replace_file() to util.[ch] to handle win32's rename().
2050 - Publish OR uptime in descriptor (and thus in directory) too.
2051 - Remember used bandwidth (both in and out), and publish 15-minute
2052 snapshots for the past day into our descriptor.
2053 - Be more aggressive about trying to make circuits when the network
2054 has changed (e.g. when you unsuspend your laptop).
2055 - Check for time skew on http headers; report date in response to
2057 - If the entrynode config line has only one node, don't pick it as
2059 - Add strict{entry|exit}nodes config options. If set to 1, then
2060 we refuse to build circuits that don't include the specified entry
2062 - OutboundBindAddress config option, to bind to a specific
2063 IP address for outgoing connect()s.
2064 - End truncated log entries (e.g. directories) with "[truncated]".
2067 Changes in version 0.0.7.3 - 2004-08-12
2068 o Stop dnsworkers from triggering an assert failure when you
2069 ask them to resolve the host "".
2072 Changes in version 0.0.7.2 - 2004-07-07
2073 o A better fix for the 0.0.0.0 problem, that will hopefully
2074 eliminate the remaining related assertion failures.
2077 Changes in version 0.0.7.1 - 2004-07-04
2078 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
2079 since internally we use 0.0.0.0 to signify "not yet resolved".
2082 Changes in version 0.0.7 - 2004-06-07
2083 o Fixes for crashes and other obnoxious bugs:
2084 - Fix an epipe bug: sometimes when directory connections failed
2085 to connect, we would give them a chance to flush before closing
2087 - When we detached from a circuit because of resolvefailed, we
2088 would immediately try the same circuit twice more, and then
2089 give up on the resolve thinking we'd tried three different
2091 - Limit the number of intro circuits we'll attempt to build for a
2092 hidden service per 15-minute period.
2093 - Check recommended-software string *early*, before actually parsing
2094 the directory. Thus we can detect an obsolete version and exit,
2095 even if the new directory format doesn't parse.
2096 o Fixes for security bugs:
2097 - Remember which nodes are dirservers when you startup, and if a
2098 random OR enables his dirport, don't automatically assume he's
2099 a trusted dirserver.
2101 - Directory connections were asking the wrong poll socket to
2102 start writing, and not asking themselves to start writing.
2103 - When we detached from a circuit because we sent a begin but
2104 didn't get a connected, we would use it again the first time;
2105 but after that we would correctly switch to a different one.
2106 - Stop warning when the first onion decrypt attempt fails; they
2107 will sometimes legitimately fail now that we rotate keys.
2108 - Override unaligned-access-ok check when $host_cpu is ia64 or
2109 arm. Apparently they allow it but the kernel whines.
2110 - Dirservers try to reconnect periodically too, in case connections
2112 - Fix some memory leaks in directory servers.
2113 - Allow backslash in Win32 filenames.
2114 - Made Tor build complain-free on FreeBSD, hopefully without
2115 breaking other BSD builds. We'll see.
2116 - Check directory signatures based on name of signer, not on whom
2117 we got the directory from. This will let us cache directories more
2119 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
2122 - Doxygen markup on all functions and global variables.
2123 - Make directory functions update routerlist, not replace it. So
2124 now directory disagreements are not so critical a problem.
2125 - Remove the upper limit on number of descriptors in a dirserver's
2126 directory (not that we were anywhere close).
2127 - Allow multiple logfiles at different severity ranges.
2128 - Allow *BindAddress to specify ":port" rather than setting *Port
2129 separately. Allow multiple instances of each BindAddress config
2130 option, so you can bind to multiple interfaces if you want.
2131 - Allow multiple exit policy lines, which are processed in order.
2132 Now we don't need that huge line with all the commas in it.
2133 - Enable accept/reject policies on SOCKS connections, so you can bind
2134 to 0.0.0.0 but still control who can use your OP.
2135 - Updated the man page to reflect these features.
2138 Changes in version 0.0.6.2 - 2004-05-16
2139 o Our integrity-checking digest was checking only the most recent cell,
2140 not the previous cells like we'd thought.
2141 Thanks to Stefan Mark for finding the flaw!
2144 Changes in version 0.0.6.1 - 2004-05-06
2145 o Fix two bugs in our AES counter-mode implementation (this affected
2146 onion-level stream encryption, but not TLS-level). It turns
2147 out we were doing something much more akin to a 16-character
2148 polyalphabetic cipher. Oops.
2149 Thanks to Stefan Mark for finding the flaw!
2150 o Retire moria3 as a directory server, and add tor26 as a directory
2154 Changes in version 0.0.6 - 2004-05-02
2156 - Hidden services and rendezvous points are implemented. Go to
2157 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2158 hidden services. (This only works via a socks4a proxy such as
2159 Privoxy, and currently it's quite slow.)
2160 - We now rotate link (tls context) keys and onion keys.
2161 - CREATE cells now include oaep padding, so you can tell
2162 if you decrypted them correctly.
2163 - Retry stream correctly when we fail to connect because of
2164 exit-policy-reject (should try another) or can't-resolve-address.
2165 - When we hup a dirserver and we've *removed* a server from the
2166 approved-routers list, now we remove that server from the
2167 in-memory directories too.
2168 - Add bandwidthburst to server descriptor.
2169 - Directories now say which dirserver signed them.
2170 - Use a tor_assert macro that logs failed assertions too.
2171 - Since we don't support truncateds much, don't bother sending them;
2172 just close the circ.
2173 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2174 - Better debugging for tls errors
2175 - Set Content-Type on the directory and hidserv descriptor.
2176 - Remove IVs from cipher code, since AES-ctr has none.
2178 - Fix an assert trigger for exit nodes that's been plaguing us since
2179 the days of 0.0.2prexx (thanks weasel!)
2180 - Fix a bug where we were closing tls connections intermittently.
2181 It turns out openssl keeps its errors around -- so if an error
2182 happens, and you don't ask about it, and then another openssl
2183 operation happens and succeeds, and you ask if there was an error,
2184 it tells you about the first error.
2185 - Fix a bug that's been lurking since 27 may 03 (!)
2186 When passing back a destroy cell, we would use the wrong circ id.
2187 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2188 - Some versions of openssl have an SSL_pending function that erroneously
2189 returns bytes when there is a non-application record pending.
2190 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2191 o We were using an array of length zero in a few places.
2192 o Win32's gethostbyname can't resolve an IP to an IP.
2193 o Win32's close can't close a socket.
2194 o Handle windows socket errors correctly.
2196 - check for <sys/limits.h> so we build on FreeBSD again, and
2197 <machine/limits.h> for NetBSD.
2200 Changes in version 0.0.5 - 2004-03-30
2201 o Install torrc as torrc.sample -- we no longer clobber your
2203 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2204 o Only build circuits after we've fetched the directory: clients were
2205 using only the directory servers before they'd fetched a directory.
2206 This also means longer startup time; so it goes.
2207 o Fix an assert trigger where an OP would fail to handshake, and we'd
2208 expect it to have a nickname.
2209 o Work around a tsocks bug: do a socks reject when AP connection dies
2210 early, else tsocks goes into an infinite loop.
2211 o Hold socks connection open until reply is flushed (if possible)
2212 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2213 the dns farm to do it.
2214 o Fix c99 aliasing warnings in rephist.c
2215 o Don't include server descriptors that are older than 24 hours in the
2217 o Give socks 'reject' replies their whole 15s to attempt to flush,
2218 rather than seeing the 60s timeout and assuming the flush had failed.
2219 o Clean automake droppings from the cvs repository
2220 o Add in a 'notice' log level for things the operator should hear
2221 but that aren't warnings
2224 Changes in version 0.0.4 - 2004-03-26
2225 o When connecting to a dirserver or OR and the network is down,
2229 Changes in version 0.0.3 - 2004-03-26
2230 o Warn and fail if server chose a nickname with illegal characters
2231 o Port to Solaris and Sparc:
2232 - include missing header fcntl.h
2233 - have autoconf find -lsocket -lnsl automatically
2234 - deal with hardware word alignment
2235 - make uname() work (solaris has a different return convention)
2236 - switch from using signal() to sigaction()
2237 o Preliminary work on reputation system:
2238 - Keep statistics on success/fail of connect attempts; they're published
2239 by kill -USR1 currently.
2240 - Add a RunTesting option to try to learn link state by creating test
2241 circuits, even when SocksPort is off.
2242 - Remove unused open circuits when there are too many.
2245 Changes in version 0.0.2 - 2004-03-19
2246 - Include strlcpy and strlcat for safer string ops
2247 - define INADDR_NONE so we compile (but still not run) on solaris
2250 Changes in version 0.0.2pre27 - 2004-03-14
2252 - Allow internal tor networks (we were rejecting internal IPs,
2253 now we allow them if they're set explicitly).
2254 - And fix a few endian issues.
2257 Changes in version 0.0.2pre26 - 2004-03-14
2259 - If a stream times out after 15s without a connected cell, don't
2260 try that circuit again: try a new one.
2261 - Retry streams at most 4 times. Then give up.
2262 - When a dirserver gets a descriptor from an unknown router, it
2263 logs its fingerprint (so the dirserver operator can choose to
2264 accept it even without mail from the server operator).
2265 - Inform unapproved servers when we reject their descriptors.
2266 - Make tor build on Windows again. It works as a client, who knows
2268 - Clearer instructions in the torrc for how to set up a server.
2269 - Be more efficient about reading fd's when our global token bucket
2270 (used for rate limiting) becomes empty.
2272 - Stop asserting that computers always go forward in time. It's
2274 - When we sent a cell (e.g. destroy) and then marked an OR connection
2275 expired, we might close it before finishing a flush if the other
2276 side isn't reading right then.
2277 - Don't allow dirservers to start if they haven't defined
2279 - We were caching transient dns failures. Oops.
2280 - Prevent servers from publishing an internal IP as their address.
2281 - Address a strcat vulnerability in circuit.c
2284 Changes in version 0.0.2pre25 - 2004-03-04
2286 - Put the OR's IP in its router descriptor, not its fqdn. That way
2287 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2290 - If the user typed in an address that didn't resolve, the server
2294 Changes in version 0.0.2pre24 - 2004-03-03
2296 - Fix an assertion failure in dns.c, where we were trying to dequeue
2297 a pending dns resolve even if it wasn't pending
2298 - Fix a spurious socks5 warning about still trying to write after the
2299 connection is finished.
2300 - Hold certain marked_for_close connections open until they're finished
2301 flushing, rather than losing bytes by closing them too early.
2302 - Correctly report the reason for ending a stream
2303 - Remove some duplicate calls to connection_mark_for_close
2304 - Put switch_id and start_daemon earlier in the boot sequence, so it
2305 will actually try to chdir() to options.DataDirectory
2306 - Make 'make test' exit(1) if a test fails; fix some unit tests
2307 - Make tor fail when you use a config option it doesn't know about,
2308 rather than warn and continue.
2309 - Make --version work
2310 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2313 Changes in version 0.0.2pre23 - 2004-02-29
2315 - Print a statement when the first circ is finished, so the user
2317 - If a relay cell is unrecognized at the end of the circuit,
2318 send back a destroy. (So attacks to mutate cells are more
2320 - New config option 'excludenodes' to avoid certain nodes for circuits.
2321 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2322 so you can collect coredumps there.
2324 - Fix a bug in tls flushing where sometimes data got wedged and
2325 didn't flush until more data got sent. Hopefully this bug was
2326 a big factor in the random delays we were seeing.
2327 - Make 'connected' cells include the resolved IP, so the client
2328 dns cache actually gets populated.
2329 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2330 - When we time-out on a stream and detach from the circuit, send an
2331 end cell down it first.
2332 - Only warn about an unknown router (in exitnodes, entrynodes,
2333 excludenodes) after we've fetched a directory.
2336 Changes in version 0.0.2pre22 - 2004-02-26
2338 - Servers publish less revealing uname information in descriptors.
2339 - More memory tracking and assertions, to crash more usefully when
2341 - If the default torrc isn't there, just use some default defaults.
2342 Plus provide an internal dirservers file if they don't have one.
2343 - When the user tries to use Tor as an http proxy, give them an http
2344 501 failure explaining that we're a socks proxy.
2345 - Dump a new router.desc on hup, to help confused people who change
2346 their exit policies and then wonder why router.desc doesn't reflect
2348 - Clean up the generic tor.sh init script that we ship with.
2350 - If the exit stream is pending on the resolve, and a destroy arrives,
2351 then the stream wasn't getting removed from the pending list. I
2352 think this was the one causing recent server crashes.
2353 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2354 - When it couldn't resolve any dirservers, it was useless from then on.
2355 Now it reloads the RouterFile (or default dirservers) if it has no
2357 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2358 many users don't even *have* a /usr/local/sbin/.
2361 Changes in version 0.0.2pre21 - 2004-02-18
2363 - There's a ChangeLog file that actually reflects the changelog.
2364 - There's a 'torify' wrapper script, with an accompanying
2365 tor-tsocks.conf, that simplifies the process of using tsocks for
2366 tor. It even has a man page.
2367 - The tor binary gets installed to sbin rather than bin now.
2368 - Retry streams where the connected cell hasn't arrived in 15 seconds
2369 - Clean up exit policy handling -- get the default out of the torrc,
2370 so we can update it without forcing each server operator to fix
2372 - Allow imaps and pop3s in default exit policy
2374 - Prevent picking middleman nodes as the last node in the circuit
2377 Changes in version 0.0.2pre20 - 2004-01-30
2379 - We now have a deb package, and it's in debian unstable. Go to
2381 - I've split the TotalBandwidth option into BandwidthRate (how many
2382 bytes per second you want to allow, long-term) and
2383 BandwidthBurst (how many bytes you will allow at once before the cap
2384 kicks in). This better token bucket approach lets you, say, set
2385 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2386 performance while not exceeding your monthly bandwidth quota.
2387 - Push out a tls record's worth of data once you've got it, rather
2388 than waiting until you've read everything waiting to be read. This
2389 may improve performance by pipelining better. We'll see.
2390 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2391 from failed circuits (if they haven't been connected yet) and attach
2393 - Expire old streams that haven't managed to connect. Some day we'll
2394 have them reattach to new circuits instead.
2397 - Fix several memory leaks that were causing servers to become bloated
2399 - Fix a few very rare assert triggers. A few more remain.
2400 - Setuid to User _before_ complaining about running as root.
2403 Changes in version 0.0.2pre19 - 2004-01-07
2405 - Fix deadlock condition in dns farm. We were telling a child to die by
2406 closing the parent's file descriptor to him. But newer children were
2407 inheriting the open file descriptor from the parent, and since they
2408 weren't closing it, the socket never closed, so the child never read
2409 eof, so he never knew to exit. Similarly, dns workers were holding
2410 open other sockets, leading to all sorts of chaos.
2411 - New cleaner daemon() code for forking and backgrounding.
2412 - If you log to a file, it now prints an entry at the top of the
2413 logfile so you know it's working.
2414 - The onionskin challenge length was 30 bytes longer than necessary.
2415 - Started to patch up the spec so it's not quite so out of date.
2418 Changes in version 0.0.2pre18 - 2004-01-02
2420 - Fix endian issues with the 'integrity' field in the relay header.
2421 - Fix a potential bug where connections in state
2422 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2425 Changes in version 0.0.2pre17 - 2003-12-30
2427 - Made --debuglogfile (or any second log file, actually) work.
2428 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2429 adversary could force us into an infinite loop.
2432 - Each onionskin handshake now includes a hash of the computed key,
2433 to prove the server's identity and help perfect forward secrecy.
2434 - Changed cell size from 256 to 512 bytes (working toward compatibility
2436 - Changed cell length to 2 bytes, and moved it to the relay header.
2437 - Implemented end-to-end integrity checking for the payloads of
2439 - Separated streamid from 'recognized' (otherwise circuits will get
2440 messed up when we try to have streams exit from the middle). We
2441 use the integrity-checking to confirm that a cell is addressed to
2443 - Randomize the initial circid and streamid values, so an adversary who
2444 breaks into a node can't learn how many circuits or streams have
2448 Changes in version 0.0.2pre16 - 2003-12-14
2450 - Fixed a bug that made HUP trigger an assert
2451 - Fixed a bug where a circuit that immediately failed wasn't being
2452 counted as a failed circuit in counting retries.
2455 - Now we close the circuit when we get a truncated cell: otherwise we're
2456 open to an anonymity attack where a bad node in the path truncates
2457 the circuit and then we open streams at him.
2458 - Add port ranges to exit policies
2459 - Add a conservative default exit policy
2460 - Warn if you're running tor as root
2461 - on HUP, retry OR connections and close/rebind listeners
2462 - options.EntryNodes: try these nodes first when picking the first node
2463 - options.ExitNodes: if your best choices happen to include any of
2464 your preferred exit nodes, you choose among just those preferred
2466 - options.ExcludedNodes: nodes that are never picked in path building
2469 Changes in version 0.0.2pre15 - 2003-12-03
2470 o Robustness and bugfixes:
2471 - Sometimes clients would cache incorrect DNS resolves, which would
2472 really screw things up.
2473 - An OP that goes offline would slowly leak all its sockets and stop
2475 - A wide variety of bugfixes in exit node selection, exit policy
2476 handling, and processing pending streams when a new circuit is
2478 - Pick nodes for a path only from those the directory says are up
2479 - Choose randomly from all running dirservers, not always the first one
2480 - Increase allowed http header size for directory fetch.
2481 - Stop writing to stderr (if we're daemonized it will be closed).
2482 - Enable -g always, so cores will be more useful to me.
2483 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2486 - Wrote a man page. It lists commonly used options.
2489 - Change default loglevel to warn.
2490 - Make PidFile default to null rather than littering in your CWD.
2491 - OnionRouter config option is now obsolete. Instead it just checks
2493 - Moved to a single unified torrc file for both clients and servers.
2496 Changes in version 0.0.2pre14 - 2003-11-29
2497 o Robustness and bugfixes:
2498 - Force the admin to make the DataDirectory himself
2499 - to get ownership/permissions right
2500 - so clients no longer make a DataDirectory and then never use it
2501 - fix bug where a client who was offline for 45 minutes would never
2502 pull down a directory again
2503 - fix (or at least hide really well) the dns assert bug that was
2504 causing server crashes
2505 - warnings and improved robustness wrt clockskew for certs
2506 - use the native daemon(3) to daemonize, when available
2507 - exit if bind() fails
2508 - exit if neither socksport nor orport is defined
2509 - include our own tor_timegm (Win32 doesn't have its own)
2510 - bugfix for win32 with lots of connections
2511 - fix minor bias in PRNG
2512 - make dirserver more robust to corrupt cached directory
2515 - Wrote the design document (woo)
2517 o Circuit building and exit policies:
2518 - Circuits no longer try to use nodes that the directory has told them
2520 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2521 bitcounts (18.0.0.0/8).
2522 - Make AP connections standby for a circuit if no suitable circuit
2523 exists, rather than failing
2524 - Circuits choose exit node based on addr/port, exit policies, and
2525 which AP connections are standing by
2526 - Bump min pathlen from 2 to 3
2527 - Relay end cells have a payload to describe why the stream ended.
2528 - If the stream failed because of exit policy, try again with a new
2530 - Clients have a dns cache to remember resolved addresses.
2531 - Notice more quickly when we have no working circuits
2534 - APPort is now called SocksPort
2535 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2537 - RecommendedVersions is now a config variable rather than
2538 hardcoded (for dirservers)
2539 - Reloads config on HUP
2540 - Usage info on -h or --help
2541 - If you set User and Group config vars, it'll setu/gid to them.
2543 Changes in version 0.0.2pre13 - 2003-10-19
2544 o General stability:
2545 - SSL_write no longer fails when it returns WANTWRITE and the number
2546 of bytes in the buf has changed by the next SSL_write call.
2547 - Fix segfault fetching directory when network is down
2548 - Fix a variety of minor memory leaks
2549 - Dirservers reload the fingerprints file on HUP, so I don't have
2550 to take down the network when I approve a new router
2551 - Default server config file has explicit Address line to specify fqdn
2554 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2555 - Make listener connections not ever alloc bufs
2557 o Autoconf improvements:
2558 - don't clobber an external CFLAGS in ./configure
2559 - Make install now works
2560 - create var/lib/tor on make install
2561 - autocreate a tor.sh initscript to help distribs
2562 - autocreate the torrc and sample-server-torrc with correct paths
2564 o Log files and Daemonizing now work:
2565 - If --DebugLogFile is specified, log to it at -l debug
2566 - If --LogFile is specified, use it instead of commandline
2567 - If --RunAsDaemon is set, tor forks and backgrounds on startup