1 Changes in version 0.1.1.17-rc - 2006-03-28
3 - Clients and servers since 0.1.1.10-alpha have been expiring
4 connections whenever they are idle for 5 minutes and they *do*
5 have circuits on them. Oops. With this new version, clients will
6 discard their previous entry guard choices and avoid choosing
7 entry guards running these flawed versions.
8 - Fix memory leak when uncompressing concatenated zlib streams. This
9 was causing substantial leaks over time on Tor servers.
10 - The v1 directory was including servers as much as 48 hours old,
11 because that's how the new routerlist->routers works. Now only
12 include them if they're 20 hours old or less.
15 - Resume building on irix64, netbsd 2.0, etc.
16 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
18 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
19 and it is confusing some users.
20 - Mirrors stop caching the v1 directory so often.
21 - Make the max number of old descriptors that a cache will hold
22 rise with the number of directory authorities, so we can scale.
23 - Change our win32 uname() hack to be more forgiving about what
24 win32 versions it thinks it's found.
27 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
29 - When the controller's *setconf commands fail, collect an error
30 message in a string and hand it back to the controller.
31 - Make the v2 dir's "Fast" flag based on relative capacity, just
32 like "Stable" is based on median uptime. Name everything in the
33 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
34 - Log server fingerprint on startup, so new server operators don't
35 have to go hunting around their filesystem for it.
36 - Return a robots.txt on our dirport to discourage google indexing.
37 - Let the controller ask for GETINFO dir/status/foo so it can ask
38 directly rather than connecting to the dir port. Only works when
39 dirport is set for now.
41 o New config options rather than constants in the code:
42 - SocksTimeout: How long do we let a socks connection wait
43 unattached before we fail it?
44 - CircuitBuildTimeout: Cull non-open circuits that were born
45 at least this many seconds ago.
46 - CircuitIdleTimeout: Cull open clean circuits that were born
47 at least this many seconds ago.
50 Changes in version 0.1.1.16-rc - 2006-03-18
51 o Bugfixes on 0.1.1.15-rc:
52 - Fix assert when the controller asks to attachstream a connect-wait
53 or resolve-wait stream.
54 - Now do address rewriting when the controller asks us to attach
55 to a particular circuit too. This will let Blossom specify
56 "moria2.exit" without having to learn what moria2's IP address is.
57 - Make the "tor --verify-config" command-line work again, so people
58 can automatically check if their torrc will parse.
59 - Authoritative dirservers no longer require an open connection from
60 a server to consider him "reachable". We need this change because
61 when we add new auth dirservers, old servers won't know not to
63 - Let Tor build on Sun CC again.
64 - Fix an off-by-one buffer size in dirserv.c that magically never
65 hit our three authorities but broke sjmurdoch's own tor network.
66 - If we as a directory mirror don't know of any v1 directory
67 authorities, then don't try to cache any v1 directories.
68 - Stop warning about unknown servers in our family when they are
70 - Stop complaining as quickly to the server operator that he
71 hasn't registered his nickname/key binding.
72 - Various cleanups so we can add new V2 Auth Dirservers.
73 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
74 reflect the updated flags in our v2 dir protocol.
75 - Resume allowing non-printable characters for exit streams (both
76 for connecting and for resolving). Now we tolerate applications
77 that don't follow the RFCs. But continue to block malformed names
80 o Bugfixes on 0.1.0.x:
81 - Fix assert bug in close_logs(): when we close and delete logs,
82 remove them all from the global "logfiles" list.
83 - Fix minor integer overflow in calculating when we expect to use up
84 our bandwidth allocation before hibernating.
85 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
86 there are multiple SSLs installed with different versions.
87 - When we try to be a server and Address is not explicitly set and
88 our hostname resolves to a private IP address, try to use an
89 interface address if it has a public address. Now Windows machines
90 that think of themselves as localhost can work by default.
93 - Let the controller ask for GETINFO dir/server/foo so it can ask
94 directly rather than connecting to the dir port.
95 - Let the controller tell us about certain router descriptors
96 that it doesn't want Tor to use in circuits. Implement
97 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
98 - New config option SafeSocks to reject all application connections
99 using unsafe socks protocols. Defaults to off.
102 Changes in version 0.1.1.15-rc - 2006-03-11
103 o Bugfixes and cleanups:
104 - When we're printing strings from the network, don't try to print
105 non-printable characters. This protects us against shell escape
106 sequence exploits, and also against attacks to fool humans into
107 misreading their logs.
108 - Fix a bug where Tor would fail to establish any connections if you
109 left it off for 24 hours and then started it: we were happy with
110 the obsolete network statuses, but they all referred to router
111 descriptors that were too old to fetch, so we ended up with no
112 valid router descriptors.
113 - Fix a seg fault in the controller's "getinfo orconn-status" command
114 while listing status on incoming handshaking connections. Introduce
115 a status name "NEW" for these connections.
116 - If we get a linelist or linelist_s config option from the torrc
117 (e.g. ExitPolicy) and it has no value, warn and skip rather than
118 silently resetting it to its default.
119 - Don't abandon entry guards until they've been down or gone for
121 - Cleaner and quieter log messages.
124 - New controller signal NEWNYM that makes new application requests
126 - Add a new circuit purpose 'controller' to let the controller ask
127 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
128 controller command to let you specify the purpose if you're starting
129 a new circuit. Add a new SETCIRCUITPURPOSE controller command to
130 let you change a circuit's purpose after it's been created.
131 - Accept "private:*" in routerdesc exit policies; not generated yet
132 because older Tors do not understand it.
133 - Add BSD-style contributed startup script "rc.subr" from Peter
137 Changes in version 0.1.1.14-alpha - 2006-02-20
138 o Bugfixes on 0.1.1.x:
139 - Don't die if we ask for a stdout or stderr log (even implicitly)
140 and we're set to RunAsDaemon -- just warn.
141 - We still had a few bugs in the OR connection rotation code that
142 caused directory servers to slowly aggregate connections to other
143 fast Tor servers. This time for sure!
144 - Make log entries on Win32 include the name of the function again.
145 - We were treating a pair of exit policies if they were equal even
146 if one said accept and the other said reject -- causing us to
147 not always publish a new descriptor since we thought nothing
149 - Retry pending server downloads as well as pending networkstatus
150 downloads when we unexpectedly get a socks request.
151 - We were ignoring the IS_FAST flag in the directory status,
152 meaning we were willing to pick trivial-bandwidth nodes for "fast"
154 - If the controller's SAVECONF command fails (e.g. due to file
155 permissions), let the controller know that it failed.
158 - If we're trying to be a Tor server and running Windows 95/98/ME
159 as a server, explain that we'll likely crash.
160 - When we're a server, a client asks for an old-style directory,
161 and our write bucket is empty, don't give it to him. This way
162 small servers can continue to serve the directory *sometimes*,
163 without getting overloaded.
164 - Compress exit policies even more -- look for duplicate lines
166 - Clients now honor the "guard" flag in the router status when
167 picking entry guards, rather than looking at is_fast or is_stable.
168 - Retain unrecognized lines in $DATADIR/state file, so that we can
169 be forward-compatible.
170 - Generate 18.0.0.0/8 address policy format in descs when we can;
171 warn when the mask is not reducible to a bit-prefix.
172 - Let the user set ControlListenAddress in the torrc. This can be
173 dangerous, but there are some cases (like a secured LAN) where it
175 - Split ReachableAddresses into ReachableDirAddresses and
176 ReachableORAddresses, so we can restrict Dir conns to port 80
177 and OR conns to port 443.
178 - Now we can target arch and OS in rpm builds (contributed by
179 Phobos). Also make the resulting dist-rpm filename match the
181 - New config options to help controllers: FetchServerDescriptors
182 and FetchHidServDescriptors for whether to fetch server
183 info and hidserv info or let the controller do it, and
184 PublishServerDescriptor and PublishHidServDescriptors.
185 - Also let the controller set the __AllDirActionsPrivate config
186 option if you want all directory fetches/publishes to happen via
187 Tor (it assumes your controller bootstraps your circuits).
190 Changes in version 0.1.1.13-alpha - 2006-02-09
191 o Crashes in 0.1.1.x:
192 - When you tried to setconf ORPort via the controller, Tor would
193 crash. So people using TorCP to become a server were sad.
194 - Solve (I hope) the stack-smashing bug that we were seeing on fast
195 servers. The problem appears to be something do with OpenSSL's
196 random number generation, or how we call it, or something. Let me
197 know if the crashes continue.
198 - Turn crypto hardware acceleration off by default, until we find
199 somebody smart who can test it for us. (It appears to produce
200 seg faults in at least some cases.)
201 - Fix a rare assert error when we've tried all intro points for
202 a hidden service and we try fetching the service descriptor again:
203 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
206 - Fix a major load balance bug: we were round-robining in 16 KB
207 chunks, and servers with bandwidthrate of 20 KB, while downloading
208 a 600 KB directory, would starve their other connections. Now we
209 try to be a bit more fair.
210 - Dir authorities and mirrors were never expiring the newest
211 descriptor for each server, causing memory and directory bloat.
212 - Fix memory-bloating and connection-bloating bug on servers: We
213 were never closing any connection that had ever had a circuit on
214 it, because we were checking conn->n_circuits == 0, yet we had a
215 bug that let it go negative.
216 - Make Tor work using squid as your http proxy again -- squid
217 returns an error if you ask for a URL that's too long, and it uses
218 a really generic error message. Plus, many people are behind a
219 transparent squid so they don't even realize it.
220 - On platforms that don't have getrlimit (like Windows), we were
221 artificially constraining ourselves to a max of 1024
222 connections. Now just assume that we can handle as many as 15000
223 connections. Hopefully this won't cause other problems.
224 - Add a new config option ExitPolicyRejectPrivate which defaults to
225 1. This means all exit policies will begin with rejecting private
226 addresses, unless the server operator explicitly turns it off.
229 - Clients no longer download descriptors for non-running descriptors.
230 - Before we add new directory authorities, we should make it
231 clear that only v1 authorities should receive/publish hidden
235 - As soon as we've fetched some more directory info, immediately
236 try to download more server descriptors. This way we don't have
237 a 10 second pause during initial bootstrapping.
238 - Remove even more loud log messages that the server operator can't
240 - When we're running an obsolete or un-recommended version, make
241 the log message more clear about what the problem is and what
242 versions *are* still recommended.
243 - Provide a more useful warn message when our onion queue gets full:
244 the CPU is too slow or the exit policy is too liberal.
245 - Don't warn when we receive a 503 from a dirserver/cache -- this
246 will pave the way for them being able to refuse if they're busy.
247 - When we fail to bind a listener, try to provide a more useful
248 log message: e.g., "Is Tor already running?"
249 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
250 Goldberg can prove things about our handshake protocol more
252 - MaxConn has been obsolete for a while now. Document the ConnLimit
253 config option, which is a *minimum* number of file descriptors
254 that must be available else Tor refuses to start.
255 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
256 if you log to syslog and want something other than LOG_DAEMON.
257 - Make dirservers generate a separate "guard" flag to mean,
258 "would make a good entry guard". Make clients parse it and vote
259 on it. Not used by clients yet.
260 - Implement --with-libevent-dir option to ./configure. Also, improve
261 search techniques to find libevent, and use those for openssl too.
262 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
263 - Only start testing reachability once we've established a
264 circuit. This will make startup on dirservers less noisy.
265 - Don't try to upload hidden service descriptors until we have
266 established a circuit.
267 - Fix the controller's "attachstream 0" command to treat conn like
268 it just connected, doing address remapping, handling .exit and
269 .onion idioms, and so on. Now we're more uniform in making sure
270 that the controller hears about new and closing connections.
273 Changes in version 0.1.1.12-alpha - 2006-01-11
274 o Bugfixes on 0.1.1.x:
275 - The fix to close duplicate server connections was closing all
276 Tor client connections if they didn't establish a circuit
277 quickly enough. Oops.
278 - Fix minor memory issue (double-free) that happened on exit.
280 o Bugfixes on 0.1.0.x:
281 - Tor didn't warn when it failed to open a log file.
284 Changes in version 0.1.1.11-alpha - 2006-01-10
285 o Crashes in 0.1.1.x:
286 - Include all the assert/crash fixes from 0.1.0.16.
287 - If you start Tor and then quit very quickly, there were some
288 races that tried to free things that weren't allocated yet.
289 - Fix a rare memory stomp if you're running hidden services.
290 - Fix segfault when specifying DirServer in config without nickname.
291 - Fix a seg fault when you finish connecting to a server but at
292 that moment you dump his server descriptor.
293 - Extendcircuit and Attachstream controller commands would
294 assert/crash if you don't give them enough arguments.
295 - Fix an assert error when we're out of space in the connection_list
296 and we try to post a hidden service descriptor (reported by weasel).
297 - If you specify a relative torrc path and you set RunAsDaemon in
298 your torrc, then it chdir()'s to the new directory. If you HUP,
299 it tries to load the new torrc location, fails, and exits.
300 The fix: no longer allow a relative path to torrc using -f.
303 - Implement "entry guards": automatically choose a handful of entry
304 nodes and stick with them for all circuits. Only pick new guards
305 when the ones you have are unsuitable, and if the old guards
306 become suitable again, switch back. This will increase security
307 dramatically against certain end-point attacks. The EntryNodes
308 config option now provides some hints about which entry guards you
309 want to use most; and StrictEntryNodes means to only use those.
311 - New directory logic: download by descriptor digest, not by
312 fingerprint. Caches try to download all listed digests from
313 authorities; clients try to download "best" digests from caches.
314 This avoids partitioning and isolating attacks better.
315 - Make the "stable" router flag in network-status be the median of
316 the uptimes of running valid servers, and make clients pay
317 attention to the network-status flags. Thus the cutoff adapts
318 to the stability of the network as a whole, making IRC, IM, etc
319 connections more reliable.
322 - Tor servers with dynamic IP addresses were needing to wait 18
323 hours before they could start doing reachability testing using
324 the new IP address and ports. This is because they were using
325 the internal descriptor to learn what to test, yet they were only
326 rebuilding the descriptor once they decided they were reachable.
327 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
328 to download certain server descriptors, throw them away, and then
329 fetch them again after 30 minutes. Now mirrors throw away these
330 server descriptors so clients can't get them.
331 - We were leaving duplicate connections to other ORs open for a week,
332 rather than closing them once we detect a duplicate. This only
333 really affected authdirservers, but it affected them a lot.
334 - Spread the authdirservers' reachability testing over the entire
335 testing interval, so we don't try to do 500 TLS's at once every
339 - If the network is down, and we try to connect to a conn because
340 we have a circuit in mind, and we timeout (30 seconds) because the
341 network never answers, we were expiring the circuit, but we weren't
342 obsoleting the connection or telling the entry_guards functions.
343 - Some Tor servers process billions of cells per day. These statistics
344 need to be uint64_t's.
345 - Check for integer overflows in more places, when adding elements
346 to smartlists. This could possibly prevent a buffer overflow
347 on malicious huge inputs. I don't see any, but I haven't looked
349 - ReachableAddresses kept growing new "reject *:*" lines on every
351 - When you "setconf log" via the controller, it should remove all
352 logs. We were automatically adding back in a "log notice stdout".
353 - Newly bootstrapped Tor networks couldn't establish hidden service
354 circuits until they had nodes with high uptime. Be more tolerant.
355 - We were marking servers down when they could not answer every piece
356 of the directory request we sent them. This was far too harsh.
357 - Fix the torify (tsocks) config file to not use Tor for localhost
359 - Directory authorities now go to the proper authority when asking for
360 a networkstatus, even when they want a compressed one.
361 - Fix a harmless bug that was causing Tor servers to log
362 "Got an end because of misc error, but we're not an AP. Closing."
363 - Authorities were treating their own descriptor changes as cosmetic,
364 meaning the descriptor available in the network-status and the
365 descriptor that clients downloaded were different.
366 - The OS X installer was adding a symlink for tor_resolve but
367 the binary was called tor-resolve (reported by Thomas Hardly).
368 - Workaround a problem with some http proxies where they refuse GET
369 requests that specify "Content-Length: 0" (reported by Adrian).
370 - Fix wrong log message when you add a "HiddenServiceNodes" config
371 line without any HiddenServiceDir line (reported by Chris Thomas).
374 - Write the TorVersion into the state file so we have a prayer of
375 keeping forward and backward compatibility.
376 - Revive the FascistFirewall config option rather than eliminating it:
377 now it's a synonym for ReachableAddresses *:80,*:443.
378 - Clients choose directory servers from the network status lists,
379 not from their internal list of router descriptors. Now they can
380 go to caches directly rather than needing to go to authorities
382 - Directory authorities ignore router descriptors that have only
383 cosmetic differences: do this for 0.1.0.x servers now too.
384 - Add a new flag to network-status indicating whether the server
385 can answer v2 directory requests too.
386 - Authdirs now stop whining so loudly about bad descriptors that
387 they fetch from other dirservers. So when there's a log complaint,
388 it's for sure from a freshly uploaded descriptor.
389 - Reduce memory requirements in our structs by changing the order
391 - There used to be two ways to specify your listening ports in a
392 server descriptor: on the "router" line and with a separate "ports"
393 line. Remove support for the "ports" line.
394 - New config option "AuthDirRejectUnlisted" for auth dirservers as
395 a panic button: if we get flooded with unusable servers we can
396 revert to only listing servers in the approved-routers file.
397 - Auth dir servers can now mark a fingerprint as "!reject" or
398 "!invalid" in the approved-routers file (as its nickname), to
399 refuse descriptors outright or include them but marked as invalid.
400 - Servers store bandwidth history across restarts/crashes.
401 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
402 get a better idea of why their circuits failed. Not used yet.
403 - Directory mirrors now cache up to 16 unrecognized network-status
404 docs. Now we can add new authdirservers and they'll be cached too.
405 - When picking a random directory, prefer non-authorities if any
407 - New controller option "getinfo desc/all-recent" to fetch the
408 latest server descriptor for every router that Tor knows about.
411 Changes in version 0.1.1.10-alpha - 2005-12-11
412 o Correctness bugfixes on 0.1.0.x:
413 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
414 corrupting the heap, losing FDs, or crashing when we need to resize
415 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
416 - Stop doing the complex voodoo overkill checking for insecure
417 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
418 - When we were closing connections, there was a rare case that
419 stomped on memory, triggering seg faults and asserts.
420 - We were neglecting to unlink marked circuits from soon-to-close OR
421 connections, which caused some rare scribbling on freed memory.
422 - When we're deciding whether a stream has enough circuits around
423 that can handle it, count the freshly dirty ones and not the ones
424 that are so dirty they won't be able to handle it.
425 - Recover better from TCP connections to Tor servers that are
426 broken but don't tell you (it happens!); and rotate TLS
427 connections once a week.
428 - When we're expiring old circuits, we had a logic error that caused
429 us to close new rendezvous circuits rather than old ones.
430 - Fix a scary-looking but apparently harmless bug where circuits
431 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
432 servers, and never switch to state CIRCUIT_STATE_OPEN.
433 - When building with -static or on Solaris, we sometimes needed to
435 - Give a useful message when people run Tor as the wrong user,
436 rather than telling them to start chowning random directories.
437 - We were failing to inform the controller about new .onion streams.
439 o Security bugfixes on 0.1.0.x:
440 - Refuse server descriptors if the fingerprint line doesn't match
441 the included identity key. Tor doesn't care, but other apps (and
442 humans) might actually be trusting the fingerprint line.
443 - We used to kill the circuit when we receive a relay command we
444 don't recognize. Now we just drop it.
445 - Start obeying our firewall options more rigorously:
446 . If we can't get to a dirserver directly, try going via Tor.
447 . Don't ever try to connect (as a client) to a place our
448 firewall options forbid.
449 . If we specify a proxy and also firewall options, obey the
450 firewall options even when we're using the proxy: some proxies
451 can only proxy to certain destinations.
452 - Fix a bug found by Lasse Overlier: when we were making internal
453 circuits (intended to be cannibalized later for rendezvous and
454 introduction circuits), we were picking them so that they had
455 useful exit nodes. There was no need for this, and it actually
456 aids some statistical attacks.
457 - Start treating internal circuits and exit circuits separately.
458 It's important to keep them separate because internal circuits
459 have their last hops picked like middle hops, rather than like
460 exit hops. So exiting on them will break the user's expectations.
462 o Bugfixes on 0.1.1.x:
463 - Take out the mis-feature where we tried to detect IP address
464 flapping for people with DynDNS, and chose not to upload a new
465 server descriptor sometimes.
466 - Try to be compatible with OpenSSL 0.9.6 again.
467 - Log fix: when the controller is logging about .onion addresses,
468 sometimes it didn't include the ".onion" part of the address.
469 - Don't try to modify options->DirServers internally -- if the
470 user didn't specify any, just add the default ones directly to
471 the trusted dirserver list. This fixes a bug where people running
472 controllers would use SETCONF on some totally unrelated config
473 option, and Tor would start yelling at them about changing their
475 - Let the controller's redirectstream command specify a port, in
476 case the controller wants to change that too.
477 - When we requested a pile of server descriptors, we sometimes
478 accidentally launched a duplicate request for the first one.
479 - Bugfix for trackhostexits: write down the fingerprint of the
480 chosen exit, not its nickname, because the chosen exit might not
482 - When parsing foo.exit, if foo is unknown, and we are leaving
483 circuits unattached, set the chosen_exit field and leave the
484 address empty. This matters because controllers got confused
486 - Directory authorities no longer try to download server
487 descriptors that they know they will reject.
489 o Features and updates:
490 - Replace balanced trees with hash tables: this should make stuff
491 significantly faster.
492 - Resume using the AES counter-mode implementation that we ship,
493 rather than OpenSSL's. Ours is significantly faster.
494 - Many other CPU and memory improvements.
495 - Add a new config option FastFirstHopPK (on by default) so clients
496 do a trivial crypto handshake for their first hop, since TLS has
497 already taken care of confidentiality and authentication.
498 - Add a new config option TestSocks so people can see if their
499 applications are using socks4, socks4a, socks5-with-ip, or
500 socks5-with-hostname. This way they don't have to keep mucking
501 with tcpdump and wondering if something got cached somewhere.
502 - Warn when listening on a public address for socks. I suspect a
503 lot of people are setting themselves up as open socks proxies,
504 and they have no idea that jerks on the Internet are using them,
505 since they simply proxy the traffic into the Tor network.
506 - Add "private:*" as an alias in configuration for policies. Now
507 you can simplify your exit policy rather than needing to list
508 every single internal or nonroutable network space.
509 - Add a new controller event type that allows controllers to get
510 all server descriptors that were uploaded to a router in its role
511 as authoritative dirserver.
512 - Start shipping socks-extensions.txt, tor-doc-unix.html,
513 tor-doc-server.html, and stylesheet.css in the tarball.
514 - Stop shipping tor-doc.html in the tarball.
517 Changes in version 0.1.1.9-alpha - 2005-11-15
518 o Usability improvements:
519 - Start calling it FooListenAddress rather than FooBindAddress,
520 since few of our users know what it means to bind an address
522 - Reduce clutter in server logs. We're going to try to make
523 them actually usable now. New config option ProtocolWarnings that
524 lets you hear about how _other Tors_ are breaking the protocol. Off
526 - Divide log messages into logging domains. Once we put some sort
527 of interface on this, it will let people looking at more verbose
528 log levels specify the topics they want to hear more about.
529 - Make directory servers return better http 404 error messages
530 instead of a generic "Servers unavailable".
531 - Check for even more Windows version flags when writing the platform
532 string in server descriptors, and note any we don't recognize.
533 - Clean up more of the OpenSSL memory when exiting, so we can detect
535 - Make directory authorities be non-versioning, non-naming by
536 default. Now we can add new directory servers without requiring
537 their operators to pay close attention.
538 - When logging via syslog, include the pid whenever we provide
539 a log entry. Suggested by Todd Fries.
541 o Performance improvements:
542 - Directory servers now silently throw away new descriptors that
543 haven't changed much if the timestamps are similar. We do this to
544 tolerate older Tor servers that upload a new descriptor every 15
545 minutes. (It seemed like a good idea at the time.)
546 - Inline bottleneck smartlist functions; use fast versions by default.
547 - Add a "Map from digest to void*" abstraction digestmap_t so we
548 can do less hex encoding/decoding. Use it in router_get_by_digest()
549 to resolve a performance bottleneck.
550 - Allow tor_gzip_uncompress to extract as much as possible from
551 truncated compressed data. Try to extract as many
552 descriptors as possible from truncated http responses (when
553 DIR_PURPOSE_FETCH_ROUTERDESC).
554 - Make circ->onionskin a pointer, not a static array. moria2 was using
555 125000 circuit_t's after it had been up for a few weeks, which
556 translates to 20+ megs of wasted space.
557 - The private half of our EDH handshake keys are now chosen out
558 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
560 o Security improvements:
561 - Start making directory caches retain old routerinfos, so soon
562 clients can start asking by digest of descriptor rather than by
563 fingerprint of server.
564 - Add half our entropy from RAND_poll in OpenSSL. This knows how
565 to use egd (if present), openbsd weirdness (if present), vms/os2
566 weirdness (if we ever port there), and more in the future.
568 o Bugfixes on 0.1.0.x:
569 - Do round-robin writes of at most 16 kB per write. This might be
570 more fair on loaded Tor servers, and it might resolve our Windows
571 crash bug. It might also slow things down.
572 - Our TLS handshakes were generating a single public/private
573 keypair for the TLS context, rather than making a new one for
574 each new connections. Oops. (But we were still rotating them
575 periodically, so it's not so bad.)
576 - When we were cannibalizing a circuit with a particular exit
577 node in mind, we weren't checking to see if that exit node was
578 already present earlier in the circuit. Oops.
579 - When a Tor server's IP changes (e.g. from a dyndns address),
580 upload a new descriptor so clients will learn too.
581 - Really busy servers were keeping enough circuits open on stable
582 connections that they were wrapping around the circuit_id
583 space. (It's only two bytes.) This exposed a bug where we would
584 feel free to reuse a circuit_id even if it still exists but has
585 been marked for close. Try to fix this bug. Some bug remains.
586 - If we would close a stream early (e.g. it asks for a .exit that
587 we know would refuse it) but the LeaveStreamsUnattached config
588 option is set by the controller, then don't close it.
590 o Bugfixes on 0.1.1.8-alpha:
591 - Fix a big pile of memory leaks, some of them serious.
592 - Do not try to download a routerdesc if we would immediately reject
594 - Resume inserting a newline between all router descriptors when
595 generating (old style) signed directories, since our spec says
597 - When providing content-type application/octet-stream for
598 server descriptors using .z, we were leaving out the
599 content-encoding header. Oops. (Everything tolerated this just
600 fine, but that doesn't mean we need to be part of the problem.)
601 - Fix a potential seg fault in getconf and getinfo using version 1
602 of the controller protocol.
603 - Avoid crash: do not check whether DirPort is reachable when we
604 are suppressing it because of hibernation.
605 - Make --hash-password not crash on exit.
608 Changes in version 0.1.1.8-alpha - 2005-10-07
609 o New features (major):
610 - Clients don't download or use the directory anymore. Now they
611 download and use network-statuses from the trusted dirservers,
612 and fetch individual server descriptors as needed from mirrors.
613 See dir-spec.txt for all the gory details.
614 - Be more conservative about whether to advertise our DirPort.
615 The main change is to not advertise if we're running at capacity
616 and either a) we could hibernate or b) our capacity is low and
617 we're using a default DirPort.
618 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
620 o New features (minor):
621 - Try to be smart about when to retry network-status and
622 server-descriptor fetches. Still needs some tuning.
623 - Stop parsing, storing, or using running-routers output (but
624 mirrors still cache and serve it).
625 - Consider a threshold of versioning dirservers (dirservers who have
626 an opinion about which Tor versions are still recommended) before
627 deciding whether to warn the user that he's obsolete.
628 - Dirservers can now reject/invalidate by key and IP, with the
629 config options "AuthDirInvalid" and "AuthDirReject". This is
630 useful since currently we automatically list servers as running
631 and usable even if we know they're jerks.
632 - Provide dire warnings to any users who set DirServer; move it out
633 of torrc.sample and into torrc.complete.
634 - Add MyFamily to torrc.sample in the server section.
635 - Add nicknames to the DirServer line, so we can refer to them
636 without requiring all our users to memorize their IP addresses.
637 - When we get an EOF or a timeout on a directory connection, note
638 how many bytes of serverdesc we are dropping. This will help
639 us determine whether it is smart to parse incomplete serverdesc
641 - Add a new function to "change pseudonyms" -- that is, to stop
642 using any currently-dirty circuits for new streams, so we don't
643 link new actions to old actions. Currently it's only called on
644 HUP (or SIGNAL RELOAD).
645 - On sighup, if UseHelperNodes changed to 1, use new circuits.
646 - Start using RAND_bytes rather than RAND_pseudo_bytes from
647 OpenSSL. Also, reseed our entropy every hour, not just at
648 startup. And entropy in 512-bit chunks, not 160-bit chunks.
650 o Fixes on 0.1.1.7-alpha:
651 - Nobody ever implemented EVENT_ADDRMAP for control protocol
652 version 0, so don't let version 0 controllers ask for it.
653 - If you requested something with too many newlines via the
654 v1 controller protocol, you could crash tor.
655 - Fix a number of memory leaks, including some pretty serious ones.
656 - Re-enable DirPort testing again, so Tor servers will be willing
657 to advertise their DirPort if it's reachable.
658 - On TLS handshake, only check the other router's nickname against
659 its expected nickname if is_named is set.
661 o Fixes forward-ported from 0.1.0.15:
662 - Don't crash when we don't have any spare file descriptors and we
663 try to spawn a dns or cpu worker.
664 - Make the numbers in read-history and write-history into uint64s,
665 so they don't overflow and publish negatives in the descriptor.
668 - For the OS X package's modified privoxy config file, comment
669 out the "logfile" line so we don't log everything passed
671 - We were whining about using socks4 or socks5-with-local-lookup
672 even when it's an IP in the "virtual" range we designed exactly
674 - We were leaking some memory every time the client changes IPs.
675 - Never call free() on tor_malloc()d memory. This will help us
676 use dmalloc to detect memory leaks.
677 - Check for named servers when looking them up by nickname;
678 warn when we'recalling a non-named server by its nickname;
679 don't warn twice about the same name.
680 - Try to list MyFamily elements by key, not by nickname, and warn
681 if we've not heard of the server.
682 - Make windows platform detection (uname equivalent) smarter.
683 - It turns out sparc64 doesn't like unaligned access either.
686 Changes in version 0.1.1.7-alpha - 2005-09-14
687 o Fixes on 0.1.1.6-alpha:
688 - Exit servers were crashing when people asked them to make a
689 connection to an address not in their exit policy.
690 - Looking up a non-existent stream for a v1 control connection would
692 - Fix a seg fault if we ask a dirserver for a descriptor by
693 fingerprint but he doesn't know about him.
694 - SETCONF was appending items to linelists, not clearing them.
695 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
696 out and refuse the setconf if it would fail.
697 - Downgrade the dirserver log messages when whining about
701 - Add Peter Palfrader's check-tor script to tor/contrib/
702 It lets you easily check whether a given server (referenced by
703 nickname) is reachable by you.
704 - Numerous changes to move towards client-side v2 directories. Not
708 - If the user gave tor an odd number of command-line arguments,
709 we were silently ignoring the last one. Now we complain and fail.
710 [This wins the oldest-bug prize -- this bug has been present since
711 November 2002, as released in Tor 0.0.0.]
712 - Do not use unaligned memory access on alpha, mips, or mipsel.
713 It *works*, but is very slow, so we treat them as if it doesn't.
714 - Retry directory requests if we fail to get an answer we like
715 from a given dirserver (we were retrying before, but only if
717 - When writing the RecommendedVersions line, sort them first.
718 - When the client asked for a rendezvous port that the hidden
719 service didn't want to provide, we were sending an IP address
720 back along with the end cell. Fortunately, it was zero. But stop
722 - Correct "your server is reachable" log entries to indicate that
723 it was self-testing that told us so.
726 Changes in version 0.1.1.6-alpha - 2005-09-09
727 o Fixes on 0.1.1.5-alpha:
728 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
729 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
730 - Fix bug with tor_memmem finding a match at the end of the string.
731 - Make unit tests run without segfaulting.
732 - Resolve some solaris x86 compile warnings.
733 - Handle duplicate lines in approved-routers files without warning.
734 - Fix bug where as soon as a server refused any requests due to his
735 exit policy (e.g. when we ask for localhost and he tells us that's
736 127.0.0.1 and he won't do it), we decided he wasn't obeying his
737 exit policy and stopped using him for any exits.
738 - Only do openssl hardware accelerator stuff if openssl version is
741 o New controller features/fixes:
742 - Add a "RESETCONF" command so you can set config options like
743 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
744 a config option in the torrc with no value, then it clears it
745 entirely (rather than setting it to its default).
746 - Add a "GETINFO config-file" to tell us where torrc is.
747 - Avoid sending blank lines when GETINFO replies should be empty.
748 - Add a QUIT command for the controller (for using it manually).
749 - Fix a bug in SAVECONF that was adding default dirservers and
750 other redundant entries to the torrc file.
752 o Start on the new directory design:
753 - Generate, publish, cache, serve new network-status format.
754 - Publish individual descriptors (by fingerprint, by "all", and by
756 - Publish client and server recommended versions separately.
757 - Allow tor_gzip_uncompress() to handle multiple concatenated
758 compressed strings. Serve compressed groups of router
759 descriptors. The compression logic here could be more
761 - Distinguish v1 authorities (all currently trusted directories)
762 from v2 authorities (all trusted directories).
763 - Change DirServers config line to note which dirs are v1 authorities.
764 - Add configuration option "V1AuthoritativeDirectory 1" which
765 moria1, moria2, and tor26 should set.
766 - Remove option when getting directory cache to see whether they
767 support running-routers; they all do now. Replace it with one
768 to see whether caches support v2 stuff.
771 - Dirservers now do their own external reachability testing of each
772 Tor server, and only list them as running if they've been found to
773 be reachable. We also send back warnings to the server's logs if
774 it uploads a descriptor that we already believe is unreachable.
775 - Implement exit enclaves: if we know an IP address for the
776 destination, and there's a running Tor server at that address
777 which allows exit to the destination, then extend the circuit to
778 that exit first. This provides end-to-end encryption and end-to-end
779 authentication. Also, if the user wants a .exit address or enclave,
780 use 4 hops rather than 3, and cannibalize a general circ for it
782 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
783 controller. Also, rotate dns and cpu workers if the controller
784 changes options that will affect them; and initialize the dns
785 worker cache tree whether or not we start out as a server.
786 - Only upload a new server descriptor when options change, 18
787 hours have passed, uptime is reset, or bandwidth changes a lot.
788 - Check [X-]Forwarded-For headers in HTTP requests when generating
789 log messages. This lets people run dirservers (and caches) behind
790 Apache but still know which IP addresses are causing warnings.
792 o Config option changes:
793 - Replace (Fascist)Firewall* config options with a new
794 ReachableAddresses option that understands address policies.
795 For example, "ReachableAddresses *:80,*:443"
796 - Get rid of IgnoreVersion undocumented config option, and make us
797 only warn, never exit, when we're running an obsolete version.
798 - Make MonthlyAccountingStart config option truly obsolete now.
801 - Reject ports 465 and 587 in the default exit policy, since
802 people have started using them for spam too.
803 - It turns out we couldn't bootstrap a network since we added
804 reachability detection in 0.1.0.1-rc. Good thing the Tor network
805 has never gone down. Add an AssumeReachable config option to let
806 servers and dirservers bootstrap. When we're trying to build a
807 high-uptime or high-bandwidth circuit but there aren't enough
808 suitable servers, try being less picky rather than simply failing.
809 - Our logic to decide if the OR we connected to was the right guy
810 was brittle and maybe open to a mitm for unverified routers.
811 - We weren't cannibalizing circuits correctly for
812 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
813 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
814 build those from scratch. This should make hidden services faster.
815 - Predict required circuits better, with an eye toward making hidden
816 services faster on the service end.
817 - Retry streams if the exit node sends back a 'misc' failure. This
818 should result in fewer random failures. Also, after failing
819 from resolve failed or misc, reset the num failures, so we give
820 it a fair shake next time we try.
821 - Clean up the rendezvous warn log msgs, and downgrade some to info.
822 - Reduce severity on logs about dns worker spawning and culling.
823 - When we're shutting down and we do something like try to post a
824 server descriptor or rendezvous descriptor, don't complain that
825 we seem to be unreachable. Of course we are, we're shutting down.
826 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
827 We don't use them yet, but maybe one day our DNS resolver will be
828 able to discover them.
829 - Make ContactInfo mandatory for authoritative directory servers.
830 - Require server descriptors to list IPv4 addresses -- hostnames
831 are no longer allowed. This also fixes some potential security
832 problems with people providing hostnames as their address and then
833 preferentially resolving them to partition users.
834 - Change log line for unreachability to explicitly suggest /etc/hosts
835 as the culprit. Also make it clearer what IP address and ports we're
836 testing for reachability.
837 - Put quotes around user-supplied strings when logging so users are
838 more likely to realize if they add bad characters (like quotes)
840 - Let auth dir servers start without specifying an Address config
842 - Make unit tests (and other invocations that aren't the real Tor)
843 run without launching listeners, creating subdirectories, and so on.
846 Changes in version 0.1.1.5-alpha - 2005-08-08
847 o Bugfixes included in 0.1.0.14.
849 o Bugfixes on 0.1.0.x:
850 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
851 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
852 it would silently using ignore the 6668.
855 Changes in version 0.1.1.4-alpha - 2005-08-04
856 o Bugfixes included in 0.1.0.13.
859 - Improve tor_gettimeofday() granularity on windows.
860 - Make clients regenerate their keys when their IP address changes.
861 - Implement some more GETINFO goodness: expose helper nodes, config
862 options, getinfo keys.
865 Changes in version 0.1.1.3-alpha - 2005-07-25
866 o Bugfixes on 0.1.1.2-alpha:
867 - Fix a bug in handling the controller's "post descriptor"
869 - Fix several bugs in handling the controller's "extend circuit"
871 - Fix a bug in handling the controller's "stream status" event.
872 - Fix an assert failure if we have a controller listening for
873 circuit events and we go offline.
874 - Re-allow hidden service descriptors to publish 0 intro points.
875 - Fix a crash when generating your hidden service descriptor if
876 you don't have enough intro points already.
878 o New features on 0.1.1.2-alpha:
879 - New controller function "getinfo accounting", to ask how
880 many bytes we've used in this time period.
881 - Experimental support for helper nodes: a lot of the risk from
882 a small static adversary comes because users pick new random
883 nodes every time they rebuild a circuit. Now users will try to
884 stick to the same small set of entry nodes if they can. Not
885 enabled by default yet.
887 o Bugfixes on 0.1.0.12:
888 - If you're an auth dir server, always publish your dirport,
889 even if you haven't yet found yourself to be reachable.
890 - Fix a size_t underflow in smartlist_join_strings2() that made
891 it do bad things when you hand it an empty smartlist.
894 Changes in version 0.1.1.2-alpha - 2005-07-14
895 o New directory servers:
896 - tor26 has changed IP address.
898 o Bugfixes on 0.1.0.x, crashes/leaks:
899 - Port the servers-not-obeying-their-exit-policies fix from 0.1.0.11.
900 - Fix an fd leak in start_daemon().
901 - On Windows, you can't always reopen a port right after you've
902 closed it. So change retry_listeners() to only close and re-open
903 ports that have changed.
904 - Fix a possible double-free in tor_gzip_uncompress().
906 o Bugfixes on 0.1.0.x, usability:
907 - When tor_socketpair() fails in Windows, give a reasonable
908 Windows-style errno back.
909 - Let people type "tor --install" as well as "tor -install" when they
910 want to make it an NT service.
911 - NT service patch from Matt Edman to improve error messages.
912 - When the controller asks for a config option with an abbreviated
913 name, give the full name in our response.
914 - Correct the man page entry on TrackHostExitsExpire.
915 - Looks like we were never delivering deflated (i.e. compressed)
916 running-routers lists, even when asked. Oops.
917 - When --disable-threads is set, do not search for or link against
920 o Bugfixes on 0.1.1.x:
921 - Fix a seg fault with autodetecting which controller version is
925 - New hidden service descriptor format: put a version in it, and
926 let people specify introduction/rendezvous points that aren't
927 in "the directory" (which is subjective anyway).
928 - Allow the DEBUG controller event to work again. Mark certain log
929 entries as "don't tell this to controllers", so we avoid cycles.
932 Changes in version 0.1.1.1-alpha - 2005-06-29
934 - Make OS X init script check for missing argument, so we don't
935 confuse users who invoke it incorrectly.
936 - Fix a seg fault in "tor --hash-password foo".
937 - Fix a possible way to DoS dirservers.
938 - When we complain that your exit policy implicitly allows local or
939 private address spaces, name them explicitly so operators can
941 - Make the log message less scary when all the dirservers are
942 temporarily unreachable.
943 - We were printing the number of idle dns workers incorrectly when
947 - Revised controller protocol (version 1) that uses ascii rather
948 than binary. Add supporting libraries in python and java so you
949 can use the controller from your applications without caring how
951 - Spiffy new support for crypto hardware accelerators. Can somebody
955 Changes in version 0.1.0.17 - 2006-02-17
956 o Crash bugfixes on 0.1.0.x:
957 - When servers with a non-zero DirPort came out of hibernation,
958 sometimes they would trigger an assert.
960 o Other important bugfixes:
961 - On platforms that don't have getrlimit (like Windows), we were
962 artificially constraining ourselves to a max of 1024
963 connections. Now just assume that we can handle as many as 15000
964 connections. Hopefully this won't cause other problems.
966 o Backported features:
967 - When we're a server, a client asks for an old-style directory,
968 and our write bucket is empty, don't give it to him. This way
969 small servers can continue to serve the directory *sometimes*,
970 without getting overloaded.
971 - Whenever you get a 503 in response to a directory fetch, try
972 once more. This will become important once servers start sending
973 503's whenever they feel busy.
974 - Fetch a new directory every 120 minutes, not every 40 minutes.
975 Now that we have hundreds of thousands of users running the old
976 directory algorithm, it's starting to hurt a lot.
977 - Bump up the period for forcing a hidden service descriptor upload
978 from 20 minutes to 1 hour.
981 Changes in version 0.1.0.16 - 2006-01-02
982 o Crash bugfixes on 0.1.0.x:
983 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
984 corrupting the heap, losing FDs, or crashing when we need to resize
985 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
986 - It turns out sparc64 platforms crash on unaligned memory access
987 too -- so detect and avoid this.
988 - Handle truncated compressed data correctly (by detecting it and
990 - Fix possible-but-unlikely free(NULL) in control.c.
991 - When we were closing connections, there was a rare case that
992 stomped on memory, triggering seg faults and asserts.
993 - Avoid potential infinite recursion when building a descriptor. (We
994 don't know that it ever happened, but better to fix it anyway.)
995 - We were neglecting to unlink marked circuits from soon-to-close OR
996 connections, which caused some rare scribbling on freed memory.
997 - Fix a memory stomping race bug when closing the joining point of two
999 - Fix an assert in time parsing found by Steven Murdoch.
1001 o Other bugfixes on 0.1.0.x:
1002 - When we're doing reachability testing, provide more useful log
1003 messages so the operator knows what to expect.
1004 - Do not check whether DirPort is reachable when we are suppressing
1005 advertising it because of hibernation.
1006 - When building with -static or on Solaris, we sometimes needed -ldl.
1007 - One of the dirservers (tor26) changed its IP address.
1008 - When we're deciding whether a stream has enough circuits around
1009 that can handle it, count the freshly dirty ones and not the ones
1010 that are so dirty they won't be able to handle it.
1011 - When we're expiring old circuits, we had a logic error that caused
1012 us to close new rendezvous circuits rather than old ones.
1013 - Give a more helpful log message when you try to change ORPort via
1014 the controller: you should upgrade Tor if you want that to work.
1015 - We were failing to parse Tor versions that start with "Tor ".
1016 - Tolerate faulty streams better: when a stream fails for reason
1017 exitpolicy, stop assuming that the router is lying about his exit
1018 policy. When a stream fails for reason misc, allow it to retry just
1019 as if it was resolvefailed. When a stream has failed three times,
1020 reset its failure count so we can try again and get all three tries.
1023 Changes in version 0.1.0.15 - 2005-09-23
1024 o Bugfixes on 0.1.0.x:
1025 - Reject ports 465 and 587 (spam targets) in default exit policy.
1026 - Don't crash when we don't have any spare file descriptors and we
1027 try to spawn a dns or cpu worker.
1028 - Get rid of IgnoreVersion undocumented config option, and make us
1029 only warn, never exit, when we're running an obsolete version.
1030 - Don't try to print a null string when your server finds itself to
1031 be unreachable and the Address config option is empty.
1032 - Make the numbers in read-history and write-history into uint64s,
1033 so they don't overflow and publish negatives in the descriptor.
1034 - Fix a minor memory leak in smartlist_string_remove().
1035 - We were only allowing ourselves to upload a server descriptor at
1036 most every 20 minutes, even if it changed earlier than that.
1037 - Clean up log entries that pointed to old URLs.
1040 Changes in version 0.1.0.14 - 2005-08-08
1041 o Bugfixes on 0.1.0.x:
1042 - Fix the other half of the bug with crypto handshakes
1044 - Fix an assert trigger if you send a 'signal term' via the
1045 controller when it's listening for 'event info' messages.
1048 Changes in version 0.1.0.13 - 2005-08-04
1049 o Bugfixes on 0.1.0.x:
1050 - Fix a critical bug in the security of our crypto handshakes.
1051 - Fix a size_t underflow in smartlist_join_strings2() that made
1052 it do bad things when you hand it an empty smartlist.
1053 - Fix Windows installer to ship Tor license (thanks to Aphex for
1054 pointing out this oversight) and put a link to the doc directory
1056 - Explicitly set no-unaligned-access for sparc: it turns out the
1057 new gcc's let you compile broken code, but that doesn't make it
1061 Changes in version 0.1.0.12 - 2005-07-18
1062 o New directory servers:
1063 - tor26 has changed IP address.
1065 o Bugfixes on 0.1.0.x:
1066 - Fix a possible double-free in tor_gzip_uncompress().
1067 - When --disable-threads is set, do not search for or link against
1069 - Don't trigger an assert if an authoritative directory server
1070 claims its dirport is 0.
1071 - Fix bug with removing Tor as an NT service: some people were
1072 getting "The service did not return an error." Thanks to Matt
1076 Changes in version 0.1.0.11 - 2005-06-30
1077 o Bugfixes on 0.1.0.x:
1078 - Fix major security bug: servers were disregarding their
1079 exit policies if clients behaved unexpectedly.
1080 - Make OS X init script check for missing argument, so we don't
1081 confuse users who invoke it incorrectly.
1082 - Fix a seg fault in "tor --hash-password foo".
1083 - The MAPADDRESS control command was broken.
1086 Changes in version 0.1.0.10 - 2005-06-14
1088 - Make NT services work and start on startup on Win32 (based on
1089 patch by Matt Edman). See the FAQ entry for details.
1090 - Make 'platform' string in descriptor more accurate for Win32
1091 servers, so it's not just "unknown platform".
1092 - REUSEADDR on normal platforms means you can rebind to the port
1093 right after somebody else has let it go. But REUSEADDR on Win32
1094 means you can bind to the port _even when somebody else already
1095 has it bound_! So, don't do that on Win32.
1096 - Clean up the log messages when starting on Win32 with no config
1098 - Allow seeding the RNG on Win32 even when you're not running as
1099 Administrator. If seeding the RNG on Win32 fails, quit.
1101 o Assert / crash bugs:
1102 - Refuse relay cells that claim to have a length larger than the
1103 maximum allowed. This prevents a potential attack that could read
1104 arbitrary memory (e.g. keys) from an exit server's process
1106 - If unofficial Tor clients connect and send weird TLS certs, our
1107 Tor server triggers an assert. Stop asserting, and start handling
1108 TLS errors better in other situations too.
1109 - Fix a race condition that can trigger an assert when we have a
1110 pending create cell and an OR connection attempt fails.
1113 - Use pthreads for worker processes rather than forking. This was
1114 forced because when we forked, we ended up wasting a lot of
1115 duplicate ram over time.
1116 - Also switch to foo_r versions of some library calls to allow
1117 reentry and threadsafeness.
1118 - Implement --disable-threads configure option. Disable threads on
1119 netbsd and openbsd by default, because they have no reentrant
1120 resolver functions (!), and on solaris since it has other
1122 - Fix possible bug on threading platforms (e.g. win32) which was
1123 leaking a file descriptor whenever a cpuworker or dnsworker died.
1124 - Fix a minor memory leak when somebody establishes an introduction
1125 point at your Tor server.
1126 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1128 - Add ./configure --with-dmalloc option, to track memory leaks.
1129 - And try to free all memory on closing, so we can detect what
1132 o Protocol correctness:
1133 - When we've connected to an OR and handshaked but didn't like
1134 the result, we were closing the conn without sending destroy
1135 cells back for pending circuits. Now send those destroys.
1136 - Start sending 'truncated' cells back rather than destroy cells
1137 if the circuit closes in front of you. This means we won't have
1138 to abandon partially built circuits.
1139 - Handle changed router status correctly when dirserver reloads
1140 fingerprint file. We used to be dropping all unverified descriptors
1141 right then. The bug was hidden because we would immediately
1142 fetch a directory from another dirserver, which would include the
1143 descriptors we just dropped.
1144 - Revise tor-spec to add more/better stream end reasons.
1145 - Revise all calls to connection_edge_end to avoid sending 'misc',
1146 and to take errno into account where possible.
1147 - Client now retries when streams end early for 'hibernating' or
1148 'resource limit' reasons, rather than failing them.
1149 - Try to be more zealous about calling connection_edge_end when
1150 things go bad with edge conns in connection.c.
1152 o Robustness improvements:
1153 - Better handling for heterogeneous / unreliable nodes:
1154 - Annotate circuits with whether they aim to contain high uptime
1155 nodes and/or high capacity nodes. When building circuits, choose
1157 - This means that every single node in an intro rend circuit,
1158 not just the last one, will have a minimum uptime.
1159 - New config option LongLivedPorts to indicate application streams
1160 that will want high uptime circuits.
1161 - Servers reset uptime when a dir fetch entirely fails. This
1162 hopefully reflects stability of the server's network connectivity.
1163 - If somebody starts his tor server in Jan 2004 and then fixes his
1164 clock, don't make his published uptime be a year.
1165 - Reset published uptime when we wake up from hibernation.
1166 - Introduce a notion of 'internal' circs, which are chosen without
1167 regard to the exit policy of the last hop. Intro and rendezvous
1168 circs must be internal circs, to avoid leaking information. Resolve
1169 and connect streams can use internal circs if they want.
1170 - New circuit pooling algorithm: keep track of what destination ports
1171 we've used recently (start out assuming we'll want to use 80), and
1172 make sure to have enough circs around to satisfy these ports. Also
1173 make sure to have 2 internal circs around if we've required internal
1174 circs lately (and with high uptime if we've seen that lately too).
1175 - Turn addr_policy_compare from a tristate to a quadstate; this should
1176 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1177 for google.com" problem.
1178 - When a client asks us for a dir mirror and we don't have one,
1179 launch an attempt to get a fresh one.
1180 - First cut at support for "create-fast" cells. Clients can use
1181 these when extending to their first hop, since the TLS already
1182 provides forward secrecy and authentication. Not enabled on
1185 o Reachability testing.
1186 - Your Tor server will automatically try to see if its ORPort and
1187 DirPort are reachable from the outside, and it won't upload its
1188 descriptor until it decides at least ORPort is reachable (when
1189 DirPort is not yet found reachable, publish it as zero).
1190 - When building testing circs for ORPort testing, use only
1191 high-bandwidth nodes, so fewer circuits fail.
1192 - Notice when our IP changes, and reset stats/uptime/reachability.
1193 - Authdirservers don't do ORPort reachability detection, since
1194 they're in clique mode, so it will be rare to find a server not
1195 already connected to them.
1196 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1200 - Now we allow two unverified servers with the same nickname
1201 but different keys. But if a nickname is verified, only that
1202 nickname+key are allowed.
1203 - If you're an authdirserver connecting to an address:port,
1204 and it's not the OR you were expecting, forget about that
1205 descriptor. If he *was* the one you were expecting, then forget
1206 about all other descriptors for that address:port.
1207 - Allow servers to publish descriptors from 12 hours in the future.
1208 Corollary: only whine about clock skew from the dirserver if
1209 he's a trusted dirserver (since now even verified servers could
1210 have quite wrong clocks).
1211 - Require servers that use the default dirservers to have public IP
1212 addresses. We have too many servers that are configured with private
1213 IPs and their admins never notice the log entries complaining that
1214 their descriptors are being rejected.
1216 o Efficiency improvements:
1217 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1218 and /dev/poll), and hopefully work better on Windows too.
1219 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1220 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1221 - Find libevent even if it's hiding in /usr/local/ and your
1222 CFLAGS and LDFLAGS don't tell you to look there.
1223 - Be able to link with libevent as a shared library (the default
1224 after 1.0d), even if it's hiding in /usr/local/lib and even
1225 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1226 assuming you're running gcc. Otherwise fail and give a useful
1228 - Switch to a new buffer management algorithm, which tries to avoid
1229 reallocing and copying quite as much. In first tests it looks like
1230 it uses *more* memory on average, but less cpu.
1231 - Switch our internal buffers implementation to use a ring buffer,
1232 to hopefully improve performance for fast servers a lot.
1233 - Reenable the part of the code that tries to flush as soon as an
1234 OR outbuf has a full TLS record available. Perhaps this will make
1235 OR outbufs not grow as huge except in rare cases, thus saving lots
1236 of CPU time plus memory.
1237 - Improve performance for dirservers: stop re-parsing the whole
1238 directory every time you regenerate it.
1239 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1240 it much faster to look up a circuit for each relay cell.
1241 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1242 since they're eating our cpu on exit nodes.
1243 - Stop wasting time doing a case insensitive comparison for every
1244 dns name every time we do any lookup. Canonicalize the names to
1245 lowercase when you first see them.
1248 - Handle unavailable hidden services better. Handle slow or busy
1249 hidden services better.
1250 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1251 circ as necessary, if there are any completed ones lying around
1252 when we try to launch one.
1253 - Make hidden services try to establish a rendezvous for 30 seconds
1254 after fetching the descriptor, rather than for n (where n=3)
1255 attempts to build a circuit.
1256 - Adjust maximum skew and age for rendezvous descriptors: let skew
1257 be 48 hours rather than 90 minutes.
1258 - Reject malformed .onion addresses rather then passing them on as
1259 normal web requests.
1262 - More Tor controller support. See
1263 http://tor.eff.org/doc/control-spec.txt for all the new features,
1264 including signals to emulate unix signals from any platform;
1265 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1266 closestream; closecircuit; etc.
1267 - Encode hashed controller passwords in hex instead of base64,
1268 to make it easier to write controllers.
1269 - Revise control spec and implementation to allow all log messages to
1270 be sent to controller with their severities intact (suggested by
1271 Matt Edman). Disable debug-level logs while delivering a debug-level
1272 log to the controller, to prevent loop. Update TorControl to handle
1273 new log event types.
1275 o New config options/defaults:
1276 - Begin scrubbing sensitive strings from logs by default. Turn off
1277 the config option SafeLogging if you need to do debugging.
1278 - New exit policy: accept most low-numbered ports, rather than
1279 rejecting most low-numbered ports.
1280 - Put a note in the torrc about abuse potential with the default
1282 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1284 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1285 based on patch from Adam Langley (basic auth only).
1286 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1287 the fast servers that have been joining lately. (Clients are now
1288 willing to load balance over up to 2 MB of advertised bandwidth
1290 - New config option MaxAdvertisedBandwidth which lets you advertise
1291 a low bandwidthrate (to not attract as many circuits) while still
1292 allowing a higher bandwidthrate in reality.
1293 - Require BandwidthRate to be at least 20kB/s for servers.
1294 - Add a NoPublish config option, so you can be a server (e.g. for
1295 testing running Tor servers in other Tor networks) without
1296 publishing your descriptor to the primary dirservers.
1297 - Add a new AddressMap config directive to rewrite incoming socks
1298 addresses. This lets you, for example, declare an implicit
1299 required exit node for certain sites.
1300 - Add a new TrackHostExits config directive to trigger addressmaps
1301 for certain incoming socks addresses -- for sites that break when
1302 your exit keeps changing (based on patch from Mike Perry).
1303 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1304 which describes how often we retry making new circuits if current
1305 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1306 how long we're willing to make use of an already-dirty circuit.
1307 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1308 a config option "ShutdownWaitLength" (when using kill -INT on
1310 - Fix an edge case in parsing config options: if they say "--"
1311 on the commandline, it's not a config option (thanks weasel).
1312 - New config option DirAllowPrivateAddresses for authdirservers.
1313 Now by default they refuse router descriptors that have non-IP or
1314 private-IP addresses.
1315 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1316 smart" default value: low for servers and high for clients.
1317 - Some people were putting "Address " in their torrc, and they had
1318 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1319 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1320 LOCALSTATEDIR/tor instead.
1321 - Implement --verify-config command-line option to check if your torrc
1322 is valid without actually launching Tor.
1324 o Logging improvements:
1325 - When dirservers refuse a server descriptor, we now log its
1326 contactinfo, platform, and the poster's IP address.
1327 - Only warn once per nickname from add_nickname_list_to_smartlist()
1328 per failure, so an entrynode or exitnode choice that's down won't
1330 - When we're connecting to an OR and he's got a different nickname/key
1331 than we were expecting, only complain loudly if we're an OP or a
1332 dirserver. Complaining loudly to the OR admins just confuses them.
1333 - Whine at you if you're a server and you don't set your contactinfo.
1334 - Warn when exit policy implicitly allows local addresses.
1335 - Give a better warning when some other server advertises an
1336 ORPort that is actually an apache running ssl.
1337 - If we get an incredibly skewed timestamp from a dirserver mirror
1338 that isn't a verified OR, don't warn -- it's probably him that's
1340 - When a dirserver causes you to give a warn, mention which dirserver
1342 - Initialize libevent later in the startup process, so the logs are
1343 already established by the time we start logging libevent warns.
1344 - Use correct errno on win32 if libevent fails.
1345 - Check and warn about known-bad/slow libevent versions.
1346 - Stop warning about sigpipes in the logs. We're going to
1347 pretend that getting these occassionally is normal and fine.
1349 o New contrib scripts:
1350 - New experimental script tor/contrib/exitlist: a simple python
1351 script to parse directories and find Tor nodes that exit to listed
1353 - New experimental script tor/contrib/ExerciseServer.py (needs more
1354 work) that uses the controller interface to build circuits and
1355 fetch pages over them. This will help us bootstrap servers that
1356 have lots of capacity but haven't noticed it yet.
1357 - New experimental script tor/contrib/PathDemo.py (needs more work)
1358 that uses the controller interface to let you choose whole paths
1360 "<hostname>.<path,separated by dots>.<length of path>.path"
1361 - New contributed script "privoxy-tor-toggle" to toggle whether
1362 Privoxy uses Tor. Seems to be configured for Debian by default.
1363 - Have torctl.in/tor.sh.in check for location of su binary (needed
1367 - chdir() to your datadirectory at the *end* of the daemonize process,
1368 not the beginning. This was a problem because the first time you
1369 run tor, if your datadir isn't there, and you have runasdaemon set
1370 to 1, it will try to chdir to it before it tries to create it. Oops.
1371 - Fix several double-mark-for-close bugs, e.g. where we were finding
1372 a conn for a cell even if that conn is already marked for close.
1373 - Stop most cases of hanging up on a socks connection without sending
1375 - Fix a bug in the RPM package: set home directory for _tor to
1376 something more reasonable when first installing.
1377 - Stop putting nodename in the Platform string in server descriptors.
1378 It doesn't actually help, and it is confusing/upsetting some people.
1379 - When using preferred entry or exit nodes, ignore whether the
1380 circuit wants uptime or capacity. They asked for the nodes, they
1382 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1383 artificially capped at 500kB.
1384 - Cache local dns resolves correctly even when they're .exit
1386 - If we're hibernating and we get a SIGINT, exit immediately.
1387 - tor-resolve requests were ignoring .exit if there was a working circuit
1388 they could use instead.
1389 - Pay more attention to the ClientOnly config option.
1390 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1391 installer screens; and don't put stuff into StartupItems unless
1392 the user asks you to.
1395 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1396 rather than just rejecting it.
1397 - If our clock jumps forward by 100 seconds or more, assume something
1398 has gone wrong with our network and abandon all not-yet-used circs.
1399 - When an application is using socks5, give him the whole variety of
1400 potential socks5 responses (connect refused, host unreachable, etc),
1401 rather than just "success" or "failure".
1402 - A more sane version numbering system. See
1403 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1404 - Change version parsing logic: a version is "obsolete" if it is not
1405 recommended and (1) there is a newer recommended version in the
1406 same series, or (2) there are no recommended versions in the same
1407 series, but there are some recommended versions in a newer series.
1408 A version is "new" if it is newer than any recommended version in
1410 - Report HTTP reasons to client when getting a response from directory
1411 servers -- so you can actually know what went wrong.
1412 - Reject odd-looking addresses at the client (e.g. addresses that
1413 contain a colon), rather than having the server drop them because
1415 - Stop publishing socksport in the directory, since it's not
1416 actually meant to be public. For compatibility, publish a 0 there
1418 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1419 cookies to disk and doesn't log each web request to disk. (Thanks
1420 to Brett Carrington for pointing this out.)
1421 - Add OSX uninstall instructions. An actual uninstall script will
1423 - Add "opt hibernating 1" to server descriptor to make it clearer
1424 whether the server is hibernating.
1427 Changes in version 0.0.9.10 - 2005-06-16
1428 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1429 - Refuse relay cells that claim to have a length larger than the
1430 maximum allowed. This prevents a potential attack that could read
1431 arbitrary memory (e.g. keys) from an exit server's process
1435 Changes in version 0.0.9.9 - 2005-04-23
1436 o Bugfixes on 0.0.9.x:
1437 - If unofficial Tor clients connect and send weird TLS certs, our
1438 Tor server triggers an assert. This release contains a minimal
1439 backport from the broader fix that we put into 0.1.0.4-rc.
1442 Changes in version 0.0.9.8 - 2005-04-07
1443 o Bugfixes on 0.0.9.x:
1444 - We have a bug that I haven't found yet. Sometimes, very rarely,
1445 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1446 thinks of itself as idle. This meant that no new circuits ever got
1447 established. Here's a workaround to kill any cpuworker that's been
1448 busy for more than 100 seconds.
1451 Changes in version 0.0.9.7 - 2005-04-01
1452 o Bugfixes on 0.0.9.x:
1453 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1454 - Compare identity to identity, not to nickname, when extending to
1455 a router not already in the directory. This was preventing us from
1456 extending to unknown routers. Oops.
1457 - Make sure to create OS X Tor user in <500 range, so we aren't
1458 creating actual system users.
1459 - Note where connection-that-hasn't-sent-end was marked, and fix
1460 a few really loud instances of this harmless bug (it's fixed more
1464 Changes in version 0.0.9.6 - 2005-03-24
1465 o Bugfixes on 0.0.9.x (crashes and asserts):
1466 - Add new end stream reasons to maintainance branch. Fix bug where
1467 reason (8) could trigger an assert. Prevent bug from recurring.
1468 - Apparently win32 stat wants paths to not end with a slash.
1469 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1470 blowing away the circuit that conn->cpath_layer points to, then
1471 checking to see if the circ is well-formed. Backport check to make
1472 sure we dont use the cpath on a closed connection.
1473 - Prevent circuit_resume_edge_reading_helper() from trying to package
1474 inbufs for marked-for-close streams.
1475 - Don't crash on hup if your options->address has become unresolvable.
1476 - Some systems (like OS X) sometimes accept() a connection and tell
1477 you the remote host is 0.0.0.0:0. If this happens, due to some
1478 other mis-features, we get confused; so refuse the conn for now.
1480 o Bugfixes on 0.0.9.x (other):
1481 - Fix harmless but scary "Unrecognized content encoding" warn message.
1482 - Add new stream error reason: TORPROTOCOL reason means "you are not
1483 speaking a version of Tor I understand; say bye-bye to your stream."
1484 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1485 into the future, now that we are more tolerant of skew. This
1486 resolves a bug where a Tor server would refuse to cache a directory
1487 because all the directories it gets are too far in the future;
1488 yet the Tor server never logs any complaints about clock skew.
1489 - Mac packaging magic: make man pages useable, and do not overwrite
1490 existing torrc files.
1491 - Make OS X log happily to /var/log/tor/tor.log
1494 Changes in version 0.0.9.5 - 2005-02-22
1495 o Bugfixes on 0.0.9.x:
1496 - Fix an assert race at exit nodes when resolve requests fail.
1497 - Stop picking unverified dir mirrors--it only leads to misery.
1498 - Patch from Matt Edman to make NT services work better. Service
1499 support is still not compiled into the executable by default.
1500 - Patch from Dmitri Bely so the Tor service runs better under
1501 the win32 SYSTEM account.
1502 - Make tor-resolve actually work (?) on Win32.
1503 - Fix a sign bug when getrlimit claims to have 4+ billion
1504 file descriptors available.
1505 - Stop refusing to start when bandwidthburst == bandwidthrate.
1506 - When create cells have been on the onion queue more than five
1507 seconds, just send back a destroy and take them off the list.
1510 Changes in version 0.0.9.4 - 2005-02-03
1511 o Bugfixes on 0.0.9:
1512 - Fix an assert bug that took down most of our servers: when
1513 a server claims to have 1 GB of bandwidthburst, don't
1515 - Don't crash as badly if we have spawned the max allowed number
1516 of dnsworkers, or we're out of file descriptors.
1517 - Block more file-sharing ports in the default exit policy.
1518 - MaxConn is now automatically set to the hard limit of max
1519 file descriptors we're allowed (ulimit -n), minus a few for
1521 - Give a clearer message when servers need to raise their
1522 ulimit -n when they start running out of file descriptors.
1523 - SGI Compatibility patches from Jan Schaumann.
1524 - Tolerate a corrupt cached directory better.
1525 - When a dirserver hasn't approved your server, list which one.
1526 - Go into soft hibernation after 95% of the bandwidth is used,
1527 not 99%. This is especially important for daily hibernators who
1528 have a small accounting max. Hopefully it will result in fewer
1529 cut connections when the hard hibernation starts.
1530 - Load-balance better when using servers that claim more than
1531 800kB/s of capacity.
1532 - Make NT services work (experimental, only used if compiled in).
1535 Changes in version 0.0.9.3 - 2005-01-21
1536 o Bugfixes on 0.0.9:
1537 - Backport the cpu use fixes from main branch, so busy servers won't
1538 need as much processor time.
1539 - Work better when we go offline and then come back, or when we
1540 run Tor at boot before the network is up. We do this by
1541 optimistically trying to fetch a new directory whenever an
1542 application request comes in and we think we're offline -- the
1543 human is hopefully a good measure of when the network is back.
1544 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1545 long as you keep using them; actually publish hidserv descriptors
1546 shortly after they change, rather than waiting 20-40 minutes.
1547 - Enable Mac startup script by default.
1548 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1549 - When you update AllowUnverifiedNodes or FirewallPorts via the
1550 controller's setconf feature, we were always appending, never
1552 - When you update HiddenServiceDir via setconf, it was screwing up
1553 the order of reading the lines, making it fail.
1554 - Do not rewrite a cached directory back to the cache; otherwise we
1555 will think it is recent and not fetch a newer one on startup.
1556 - Workaround for webservers that lie about Content-Encoding: Tor
1557 now tries to autodetect compressed directories and compression
1558 itself. This lets us Proxypass dir fetches through apache.
1561 Changes in version 0.0.9.2 - 2005-01-04
1562 o Bugfixes on 0.0.9 (crashes and asserts):
1563 - Fix an assert on startup when the disk is full and you're logging
1565 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
1566 style address, then we'd crash.
1567 - Fix an assert trigger when the running-routers string we get from
1568 a dirserver is broken.
1569 - Make worker threads start and run on win32. Now win32 servers
1571 - Bandaid (not actually fix, but now it doesn't crash) an assert
1572 where the dns worker dies mysteriously and the main Tor process
1573 doesn't remember anything about the address it was resolving.
1575 o Bugfixes on 0.0.9 (Win32):
1576 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
1577 name out of the warning/assert messages.
1578 - Fix a superficial "unhandled error on read" bug on win32.
1579 - The win32 installer no longer requires a click-through for our
1580 license, since our Free Software license grants rights but does not
1582 - Win32: When connecting to a dirserver fails, try another one
1583 immediately. (This was already working for non-win32 Tors.)
1584 - Stop trying to parse $HOME on win32 when hunting for default
1586 - Make tor-resolve.c work on win32 by calling network_init().
1588 o Bugfixes on 0.0.9 (other):
1589 - Make 0.0.9.x build on Solaris again.
1590 - Due to a fencepost error, we were blowing away the \n when reporting
1591 confvalue items in the controller. So asking for multiple config
1592 values at once couldn't work.
1593 - When listing circuits that are pending on an opening OR connection,
1594 if we're an OR we were listing circuits that *end* at us as
1595 being pending on every listener, dns/cpu worker, etc. Stop that.
1596 - Dirservers were failing to create 'running-routers' or 'directory'
1597 strings if we had more than some threshold of routers. Fix them so
1598 they can handle any number of routers.
1599 - Fix a superficial "Duplicate mark for close" bug.
1600 - Stop checking for clock skew for OR connections, even for servers.
1601 - Fix a fencepost error that was chopping off the last letter of any
1602 nickname that is the maximum allowed nickname length.
1603 - Update URLs in log messages so they point to the new website.
1604 - Fix a potential problem in mangling server private keys while
1605 writing to disk (not triggered yet, as far as we know).
1606 - Include the licenses for other free software we include in Tor,
1607 now that we're shipping binary distributions more regularly.
1610 Changes in version 0.0.9.1 - 2004-12-15
1611 o Bugfixes on 0.0.9:
1612 - Make hibernation actually work.
1613 - Make HashedControlPassword config option work.
1614 - When we're reporting event circuit status to a controller,
1615 don't use the stream status code.
1618 Changes in version 0.0.9 - 2004-12-12
1619 o Bugfixes on 0.0.8.1 (Crashes and asserts):
1620 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
1621 write() call will fail and we handle it there.
1622 - When we run out of disk space, or other log writing error, don't
1623 crash. Just stop logging to that log and continue.
1624 - Fix isspace() and friends so they still make Solaris happy
1625 but also so they don't trigger asserts on win32.
1626 - Fix assert failure on malformed socks4a requests.
1627 - Fix an assert bug where a hidden service provider would fail if
1628 the first hop of his rendezvous circuit was down.
1629 - Better handling of size_t vs int, so we're more robust on 64
1632 o Bugfixes on 0.0.8.1 (Win32):
1633 - Make windows sockets actually non-blocking (oops), and handle
1634 win32 socket errors better.
1635 - Fix parse_iso_time on platforms without strptime (eg win32).
1636 - win32: when being multithreaded, leave parent fdarray open.
1637 - Better handling of winsock includes on non-MSV win32 compilers.
1638 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
1640 - Make unit tests work on win32.
1642 o Bugfixes on 0.0.8.1 (Path selection and streams):
1643 - Calculate timeout for waiting for a connected cell from the time
1644 we sent the begin cell, not from the time the stream started. If
1645 it took a long time to establish the circuit, we would time out
1646 right after sending the begin cell.
1647 - Fix router_compare_addr_to_addr_policy: it was not treating a port
1648 of * as always matching, so we were picking reject *:* nodes as
1649 exit nodes too. Oops.
1650 - When read() failed on a stream, we would close it without sending
1651 back an end. So 'connection refused' would simply be ignored and
1652 the user would get no response.
1653 - Stop a sigpipe: when an 'end' cell races with eof from the app,
1654 we shouldn't hold-open-until-flush if the eof arrived first.
1655 - Let resolve conns retry/expire also, rather than sticking around
1657 - Fix more dns related bugs: send back resolve_failed and end cells
1658 more reliably when the resolve fails, rather than closing the
1659 circuit and then trying to send the cell. Also attach dummy resolve
1660 connections to a circuit *before* calling dns_resolve(), to fix
1661 a bug where cached answers would never be sent in RESOLVED cells.
1663 o Bugfixes on 0.0.8.1 (Circuits):
1664 - Finally fix a bug that's been plaguing us for a year:
1665 With high load, circuit package window was reaching 0. Whenever
1666 we got a circuit-level sendme, we were reading a lot on each
1667 socket, but only writing out a bit. So we would eventually reach
1668 eof. This would be noticed and acted on even when there were still
1669 bytes sitting in the inbuf.
1670 - Use identity comparison, not nickname comparison, to choose which
1671 half of circuit-ID-space each side gets to use. This is needed
1672 because sometimes we think of a router as a nickname, and sometimes
1673 as a hex ID, and we can't predict what the other side will do.
1675 o Bugfixes on 0.0.8.1 (Other):
1676 - Fix a whole slew of memory leaks.
1677 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
1678 - If we are using select, make sure we stay within FD_SETSIZE.
1679 - When poll() is interrupted, we shouldn't believe the revents values.
1680 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
1681 and smartlist_len, which are two major profiling offenders.
1682 - If do_hup fails, actually notice.
1683 - Flush the log file descriptor after we print "Tor opening log file",
1684 so we don't see those messages days later.
1685 - Hidden service operators now correctly handle version 1 style
1686 INTRODUCE1 cells (nobody generates them still, so not a critical
1688 - Handle more errnos from accept() without closing the listener.
1689 Some OpenBSD machines were closing their listeners because
1690 they ran out of file descriptors.
1691 - Some people had wrapped their tor client/server in a script
1692 that would restart it whenever it died. This did not play well
1693 with our "shut down if your version is obsolete" code. Now people
1694 don't fetch a new directory if their local cached version is
1696 - Make our autogen.sh work on ksh as well as bash.
1697 - Better torrc example lines for dirbindaddress and orbindaddress.
1698 - Improved bounds checking on parsed ints (e.g. config options and
1699 the ones we find in directories.)
1700 - Stop using separate defaults for no-config-file and
1701 empty-config-file. Now you have to explicitly turn off SocksPort,
1702 if you don't want it open.
1703 - We were starting to daemonize before we opened our logs, so if
1704 there were any problems opening logs, we would complain to stderr,
1705 which wouldn't work, and then mysteriously exit.
1706 - If a verified OR connects to us before he's uploaded his descriptor,
1707 or we verify him and hup but he still has the original TLS
1708 connection, then conn->nickname is still set like he's unverified.
1710 o Code security improvements, inspired by Ilja:
1711 - tor_snprintf wrapper over snprintf with consistent (though not C99)
1713 - Replace sprintf with tor_snprintf. (I think they were all safe, but
1715 - Replace strcpy/strncpy with strlcpy in more places.
1716 - Avoid strcat; use tor_snprintf or strlcat instead.
1718 o Features (circuits and streams):
1719 - New circuit building strategy: keep a list of ports that we've
1720 used in the past 6 hours, and always try to have 2 circuits open
1721 or on the way that will handle each such port. Seed us with port
1722 80 so web users won't complain that Tor is "slow to start up".
1723 - Make kill -USR1 dump more useful stats about circuits.
1724 - When warning about retrying or giving up, print the address, so
1725 the user knows which one it's talking about.
1726 - If you haven't used a clean circuit in an hour, throw it away,
1727 just to be on the safe side. (This means after 6 hours a totally
1728 unused Tor client will have no circuits open.)
1729 - Support "foo.nickname.exit" addresses, to let Alice request the
1730 address "foo" as viewed by exit node "nickname". Based on a patch
1732 - If your requested entry or exit node has advertised bandwidth 0,
1734 - Be more greedy about filling up relay cells -- we try reading again
1735 once we've processed the stuff we read, in case enough has arrived
1736 to fill the last cell completely.
1737 - Refuse application socks connections to port 0.
1738 - Use only 0.0.9pre1 and later servers for resolve cells.
1740 o Features (bandwidth):
1741 - Hibernation: New config option "AccountingMax" lets you
1742 set how many bytes per month (in each direction) you want to
1743 allow your server to consume. Rather than spreading those
1744 bytes out evenly over the month, we instead hibernate for some
1745 of the month and pop up at a deterministic time, work until
1746 the bytes are consumed, then hibernate again. Config option
1747 "MonthlyAccountingStart" lets you specify which day of the month
1748 your billing cycle starts on.
1749 - Implement weekly/monthly/daily accounting: now you specify your
1750 hibernation properties by
1751 AccountingMax N bytes|KB|MB|GB|TB
1752 AccountingStart day|week|month [day] HH:MM
1753 Defaults to "month 1 0:00".
1754 - Let bandwidth and interval config options be specified as 5 bytes,
1755 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
1757 o Features (directories):
1758 - New "router-status" line in directory, to better bind each verified
1759 nickname to its identity key.
1760 - Clients can ask dirservers for /dir.z to get a compressed version
1761 of the directory. Only works for servers running 0.0.9, of course.
1762 - Make clients cache directories and use them to seed their router
1763 lists at startup. This means clients have a datadir again.
1764 - Respond to content-encoding headers by trying to uncompress as
1766 - Clients and servers now fetch running-routers; cache
1767 running-routers; compress running-routers; serve compressed
1769 - Make moria2 advertise a dirport of 80, so people behind firewalls
1770 will be able to get a directory.
1771 - Http proxy support
1772 - Dirservers translate requests for http://%s:%d/x to /x
1773 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
1774 be routed through this host.
1775 - Clients ask for /tor/x rather than /x for new enough dirservers.
1776 This way we can one day coexist peacefully with apache.
1777 - Clients specify a "Host: %s%d" http header, to be compatible
1778 with more proxies, and so running squid on an exit node can work.
1779 - Protect dirservers from overzealous descriptor uploading -- wait
1780 10 seconds after directory gets dirty, before regenerating.
1782 o Features (packages and install):
1783 - Add NSI installer contributed by J Doe.
1784 - Apply NT service patch from Osamu Fujino. Still needs more work.
1785 - Commit VC6 and VC7 workspace/project files.
1786 - Commit a tor.spec for making RPM files, with help from jbash.
1787 - Add contrib/torctl.in contributed by Glenn Fink.
1788 - Make expand_filename handle ~ and ~username.
1789 - Use autoconf to enable largefile support where necessary. Use
1790 ftello where available, since ftell can fail at 2GB.
1791 - Ship src/win32/ in the tarball, so people can use it to build.
1792 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
1795 o Features (ui controller):
1796 - Control interface: a separate program can now talk to your
1797 client/server over a socket, and get/set config options, receive
1798 notifications of circuits and streams starting/finishing/dying,
1799 bandwidth used, etc. The next step is to get some GUIs working.
1800 Let us know if you want to help out. See doc/control-spec.txt .
1801 - Ship a contrib/tor-control.py as an example script to interact
1802 with the control port.
1803 - "tor --hash-password zzyxz" will output a salted password for
1804 use in authenticating to the control interface.
1805 - Implement the control-spec's SAVECONF command, to write your
1806 configuration to torrc.
1807 - Get cookie authentication for the controller closer to working.
1808 - When set_conf changes our server descriptor, upload a new copy.
1809 But don't upload it too often if there are frequent changes.
1811 o Features (config and command-line):
1812 - Deprecate unofficial config option abbreviations, and abbreviations
1813 not on the command line.
1814 - Configuration infrastructure support for warning on obsolete
1816 - Give a slightly more useful output for "tor -h".
1817 - Break DirFetchPostPeriod into:
1818 - DirFetchPeriod for fetching full directory,
1819 - StatusFetchPeriod for fetching running-routers,
1820 - DirPostPeriod for posting server descriptor,
1821 - RendPostPeriod for posting hidden service descriptors.
1822 - New log format in config:
1823 "Log minsev[-maxsev] stdout|stderr|syslog" or
1824 "Log minsev[-maxsev] file /var/foo"
1825 - DirPolicy config option, to let people reject incoming addresses
1826 from their dirserver.
1827 - "tor --list-fingerprint" will list your identity key fingerprint
1829 - Make tor --version --version dump the cvs Id of every file.
1830 - New 'MyFamily nick1,...' config option for a server to
1831 specify other servers that shouldn't be used in the same circuit
1832 with it. Only believed if nick1 also specifies us.
1833 - New 'NodeFamily nick1,nick2,...' config option for a client to
1834 specify nodes that it doesn't want to use in the same circuit.
1835 - New 'Redirectexit pattern address:port' config option for a
1836 server to redirect exit connections, e.g. to a local squid.
1837 - Add "pass" target for RedirectExit, to make it easier to break
1838 out of a sequence of RedirectExit rules.
1839 - Make the dirservers file obsolete.
1840 - Include a dir-signing-key token in directories to tell the
1841 parsing entity which key is being used to sign.
1842 - Remove the built-in bulky default dirservers string.
1843 - New config option "Dirserver %s:%d [fingerprint]", which can be
1844 repeated as many times as needed. If no dirservers specified,
1845 default to moria1,moria2,tor26.
1846 - Make 'Routerfile' config option obsolete.
1847 - Discourage people from setting their dirfetchpostperiod more often
1848 than once per minute.
1851 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
1852 get back to normal.)
1853 - Accept *:706 (silc) in default exit policy.
1854 - Implement new versioning format for post 0.1.
1855 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
1856 log more informatively.
1857 - Check clock skew for verified servers, but allow unverified
1858 servers and clients to have any clock skew.
1859 - Make sure the hidden service descriptors are at a random offset
1860 from each other, to hinder linkability.
1861 - Clients now generate a TLS cert too, in preparation for having
1862 them act more like real nodes.
1863 - Add a pure-C tor-resolve implementation.
1864 - Use getrlimit and friends to ensure we can reach MaxConn (currently
1865 1024) file descriptors.
1866 - Raise the max dns workers from 50 to 100.
1869 Changes in version 0.0.8.1 - 2004-10-13
1871 - Fix a seg fault that can be triggered remotely for Tor
1872 clients/servers with an open dirport.
1873 - Fix a rare assert trigger, where routerinfos for entries in
1874 our cpath would expire while we're building the path.
1875 - Fix a bug in OutboundBindAddress so it (hopefully) works.
1876 - Fix a rare seg fault for people running hidden services on
1877 intermittent connections.
1878 - Fix a bug in parsing opt keywords with objects.
1879 - Fix a stale pointer assert bug when a stream detaches and
1881 - Fix a string format vulnerability (probably not exploitable)
1882 in reporting stats locally.
1883 - Fix an assert trigger: sometimes launching circuits can fail
1884 immediately, e.g. because too many circuits have failed recently.
1885 - Fix a compile warning on 64 bit platforms.
1888 Changes in version 0.0.8 - 2004-08-25
1890 - Made our unit tests compile again on OpenBSD 3.5, and tor
1891 itself compile again on OpenBSD on a sparc64.
1892 - We were neglecting milliseconds when logging on win32, so
1893 everything appeared to happen at the beginning of each second.
1894 - Check directory signature _before_ you decide whether you're
1895 you're running an obsolete version and should exit.
1896 - Check directory signature _before_ you parse the running-routers
1897 list to decide who's running.
1898 - Check return value of fclose while writing to disk, so we don't
1899 end up with broken files when servers run out of disk space.
1900 - Port it to SunOS 5.9 / Athena
1901 - Fix two bugs in saving onion keys to disk when rotating, so
1902 hopefully we'll get fewer people using old onion keys.
1903 - Remove our mostly unused -- and broken -- hex_encode()
1904 function. Use base16_encode() instead. (Thanks to Timo Lindfors
1905 for pointing out this bug.)
1906 - Only pick and establish intro points after we've gotten a
1908 - Fix assert triggers: if the other side returns an address 0.0.0.0,
1909 don't put it into the client dns cache.
1910 - If a begin failed due to exit policy, but we believe the IP
1911 address should have been allowed, switch that router to exitpolicy
1912 reject *:* until we get our next directory.
1915 - 'Extend' relay cell payloads now include the digest of the
1916 intended next hop's identity key. Now we can verify that we're
1917 extending to the right router, and also extend to routers we
1918 hadn't heard of before.
1921 - Tor nodes can now act as relays (with an advertised ORPort)
1922 without being manually verified by the dirserver operators.
1923 - Uploaded descriptors of unverified routers are now accepted
1924 by the dirservers, and included in the directory.
1925 - Verified routers are listed by nickname in the running-routers
1926 list; unverified routers are listed as "$<fingerprint>".
1927 - We now use hash-of-identity-key in most places rather than
1928 nickname or addr:port, for improved security/flexibility.
1929 - AllowUnverifiedNodes config option to let circuits choose no-name
1930 routers in entry,middle,exit,introduction,rendezvous positions.
1931 Allow middle and rendezvous positions by default.
1932 - When picking unverified routers, skip those with low uptime and/or
1933 low bandwidth, depending on what properties you care about.
1934 - ClientOnly option for nodes that never want to become servers.
1935 - Directory caching.
1936 - "AuthoritativeDir 1" option for the official dirservers.
1937 - Now other nodes (clients and servers) will cache the latest
1938 directory they've pulled down.
1939 - They can enable their DirPort to serve it to others.
1940 - Clients will pull down a directory from any node with an open
1941 DirPort, and check the signature/timestamp correctly.
1942 - Authoritative dirservers now fetch directories from other
1943 authdirservers, to stay better synced.
1944 - Running-routers list tells who's down also, along with noting
1945 if they're verified (listed by nickname) or unverified (listed
1947 - Allow dirservers to serve running-router list separately.
1948 This isn't used yet.
1949 - You can now fetch $DIRURL/running-routers to get just the
1950 running-routers line, not the whole descriptor list. (But
1951 clients don't use this yet.)
1952 - Clients choose nodes proportional to advertised bandwidth.
1953 - Clients avoid using nodes with low uptime as introduction points.
1954 - Handle servers with dynamic IP addresses: don't just replace
1955 options->Address with the resolved one at startup, and
1956 detect our address right before we make a routerinfo each time.
1957 - 'FascistFirewall' option to pick dirservers and ORs on specific
1958 ports; plus 'FirewallPorts' config option to tell FascistFirewall
1959 which ports are open. (Defaults to 80,443)
1960 - Try other dirservers immediately if the one you try is down. This
1961 should tolerate down dirservers better now.
1962 - ORs connect-on-demand to other ORs
1963 - If you get an extend cell to an OR you're not connected to,
1964 connect, handshake, and forward the create cell.
1965 - The authoritative dirservers stay connected to everybody,
1966 and everybody stays connected to 0.0.7 servers, but otherwise
1967 clients/servers expire unused connections after 5 minutes.
1968 - When servers get a sigint, they delay 30 seconds (refusing new
1969 connections) then exit. A second sigint causes immediate exit.
1970 - File and name management:
1971 - Look for .torrc if no CONFDIR "torrc" is found.
1972 - If no datadir is defined, then choose, make, and secure ~/.tor
1974 - If torrc not found, exitpolicy reject *:*.
1975 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
1976 - If no nickname is defined, derive default from hostname.
1977 - Rename secret key files, e.g. identity.key -> secret_id_key,
1978 to discourage people from mailing their identity key to tor-ops.
1979 - Refuse to build a circuit before the directory has arrived --
1980 it won't work anyway, since you won't know the right onion keys
1982 - Parse tor version numbers so we can do an is-newer-than check
1983 rather than an is-in-the-list check.
1984 - New socks command 'resolve', to let us shim gethostbyname()
1986 - A 'tor_resolve' script to access the socks resolve functionality.
1987 - A new socks-extensions.txt doc file to describe our
1988 interpretation and extensions to the socks protocols.
1989 - Add a ContactInfo option, which gets published in descriptor.
1990 - Write tor version at the top of each log file
1991 - New docs in the tarball:
1993 - Document that you should proxy your SSL traffic too.
1994 - Log a warning if the user uses an unsafe socks variant, so people
1995 are more likely to learn about privoxy or socat.
1996 - Log a warning if you're running an unverified server, to let you
1997 know you might want to get it verified.
1998 - Change the default exit policy to reject the default edonkey,
1999 kazaa, gnutella ports.
2000 - Add replace_file() to util.[ch] to handle win32's rename().
2001 - Publish OR uptime in descriptor (and thus in directory) too.
2002 - Remember used bandwidth (both in and out), and publish 15-minute
2003 snapshots for the past day into our descriptor.
2004 - Be more aggressive about trying to make circuits when the network
2005 has changed (e.g. when you unsuspend your laptop).
2006 - Check for time skew on http headers; report date in response to
2008 - If the entrynode config line has only one node, don't pick it as
2010 - Add strict{entry|exit}nodes config options. If set to 1, then
2011 we refuse to build circuits that don't include the specified entry
2013 - OutboundBindAddress config option, to bind to a specific
2014 IP address for outgoing connect()s.
2015 - End truncated log entries (e.g. directories) with "[truncated]".
2018 Changes in version 0.0.7.3 - 2004-08-12
2019 o Stop dnsworkers from triggering an assert failure when you
2020 ask them to resolve the host "".
2023 Changes in version 0.0.7.2 - 2004-07-07
2024 o A better fix for the 0.0.0.0 problem, that will hopefully
2025 eliminate the remaining related assertion failures.
2028 Changes in version 0.0.7.1 - 2004-07-04
2029 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
2030 since internally we use 0.0.0.0 to signify "not yet resolved".
2033 Changes in version 0.0.7 - 2004-06-07
2034 o Fixes for crashes and other obnoxious bugs:
2035 - Fix an epipe bug: sometimes when directory connections failed
2036 to connect, we would give them a chance to flush before closing
2038 - When we detached from a circuit because of resolvefailed, we
2039 would immediately try the same circuit twice more, and then
2040 give up on the resolve thinking we'd tried three different
2042 - Limit the number of intro circuits we'll attempt to build for a
2043 hidden service per 15-minute period.
2044 - Check recommended-software string *early*, before actually parsing
2045 the directory. Thus we can detect an obsolete version and exit,
2046 even if the new directory format doesn't parse.
2047 o Fixes for security bugs:
2048 - Remember which nodes are dirservers when you startup, and if a
2049 random OR enables his dirport, don't automatically assume he's
2050 a trusted dirserver.
2052 - Directory connections were asking the wrong poll socket to
2053 start writing, and not asking themselves to start writing.
2054 - When we detached from a circuit because we sent a begin but
2055 didn't get a connected, we would use it again the first time;
2056 but after that we would correctly switch to a different one.
2057 - Stop warning when the first onion decrypt attempt fails; they
2058 will sometimes legitimately fail now that we rotate keys.
2059 - Override unaligned-access-ok check when $host_cpu is ia64 or
2060 arm. Apparently they allow it but the kernel whines.
2061 - Dirservers try to reconnect periodically too, in case connections
2063 - Fix some memory leaks in directory servers.
2064 - Allow backslash in Win32 filenames.
2065 - Made Tor build complain-free on FreeBSD, hopefully without
2066 breaking other BSD builds. We'll see.
2067 - Check directory signatures based on name of signer, not on whom
2068 we got the directory from. This will let us cache directories more
2070 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
2073 - Doxygen markup on all functions and global variables.
2074 - Make directory functions update routerlist, not replace it. So
2075 now directory disagreements are not so critical a problem.
2076 - Remove the upper limit on number of descriptors in a dirserver's
2077 directory (not that we were anywhere close).
2078 - Allow multiple logfiles at different severity ranges.
2079 - Allow *BindAddress to specify ":port" rather than setting *Port
2080 separately. Allow multiple instances of each BindAddress config
2081 option, so you can bind to multiple interfaces if you want.
2082 - Allow multiple exit policy lines, which are processed in order.
2083 Now we don't need that huge line with all the commas in it.
2084 - Enable accept/reject policies on SOCKS connections, so you can bind
2085 to 0.0.0.0 but still control who can use your OP.
2086 - Updated the man page to reflect these features.
2089 Changes in version 0.0.6.2 - 2004-05-16
2090 o Our integrity-checking digest was checking only the most recent cell,
2091 not the previous cells like we'd thought.
2092 Thanks to Stefan Mark for finding the flaw!
2095 Changes in version 0.0.6.1 - 2004-05-06
2096 o Fix two bugs in our AES counter-mode implementation (this affected
2097 onion-level stream encryption, but not TLS-level). It turns
2098 out we were doing something much more akin to a 16-character
2099 polyalphabetic cipher. Oops.
2100 Thanks to Stefan Mark for finding the flaw!
2101 o Retire moria3 as a directory server, and add tor26 as a directory
2105 Changes in version 0.0.6 - 2004-05-02
2107 - Hidden services and rendezvous points are implemented. Go to
2108 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2109 hidden services. (This only works via a socks4a proxy such as
2110 Privoxy, and currently it's quite slow.)
2111 - We now rotate link (tls context) keys and onion keys.
2112 - CREATE cells now include oaep padding, so you can tell
2113 if you decrypted them correctly.
2114 - Retry stream correctly when we fail to connect because of
2115 exit-policy-reject (should try another) or can't-resolve-address.
2116 - When we hup a dirserver and we've *removed* a server from the
2117 approved-routers list, now we remove that server from the
2118 in-memory directories too.
2119 - Add bandwidthburst to server descriptor.
2120 - Directories now say which dirserver signed them.
2121 - Use a tor_assert macro that logs failed assertions too.
2122 - Since we don't support truncateds much, don't bother sending them;
2123 just close the circ.
2124 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2125 - Better debugging for tls errors
2126 - Set Content-Type on the directory and hidserv descriptor.
2127 - Remove IVs from cipher code, since AES-ctr has none.
2129 - Fix an assert trigger for exit nodes that's been plaguing us since
2130 the days of 0.0.2prexx (thanks weasel!)
2131 - Fix a bug where we were closing tls connections intermittently.
2132 It turns out openssl keeps its errors around -- so if an error
2133 happens, and you don't ask about it, and then another openssl
2134 operation happens and succeeds, and you ask if there was an error,
2135 it tells you about the first error.
2136 - Fix a bug that's been lurking since 27 may 03 (!)
2137 When passing back a destroy cell, we would use the wrong circ id.
2138 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2139 - Some versions of openssl have an SSL_pending function that erroneously
2140 returns bytes when there is a non-application record pending.
2141 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2142 o We were using an array of length zero in a few places.
2143 o Win32's gethostbyname can't resolve an IP to an IP.
2144 o Win32's close can't close a socket.
2145 o Handle windows socket errors correctly.
2147 - check for <sys/limits.h> so we build on FreeBSD again, and
2148 <machine/limits.h> for NetBSD.
2151 Changes in version 0.0.5 - 2004-03-30
2152 o Install torrc as torrc.sample -- we no longer clobber your
2154 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2155 o Only build circuits after we've fetched the directory: clients were
2156 using only the directory servers before they'd fetched a directory.
2157 This also means longer startup time; so it goes.
2158 o Fix an assert trigger where an OP would fail to handshake, and we'd
2159 expect it to have a nickname.
2160 o Work around a tsocks bug: do a socks reject when AP connection dies
2161 early, else tsocks goes into an infinite loop.
2162 o Hold socks connection open until reply is flushed (if possible)
2163 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2164 the dns farm to do it.
2165 o Fix c99 aliasing warnings in rephist.c
2166 o Don't include server descriptors that are older than 24 hours in the
2168 o Give socks 'reject' replies their whole 15s to attempt to flush,
2169 rather than seeing the 60s timeout and assuming the flush had failed.
2170 o Clean automake droppings from the cvs repository
2171 o Add in a 'notice' log level for things the operator should hear
2172 but that aren't warnings
2175 Changes in version 0.0.4 - 2004-03-26
2176 o When connecting to a dirserver or OR and the network is down,
2180 Changes in version 0.0.3 - 2004-03-26
2181 o Warn and fail if server chose a nickname with illegal characters
2182 o Port to Solaris and Sparc:
2183 - include missing header fcntl.h
2184 - have autoconf find -lsocket -lnsl automatically
2185 - deal with hardware word alignment
2186 - make uname() work (solaris has a different return convention)
2187 - switch from using signal() to sigaction()
2188 o Preliminary work on reputation system:
2189 - Keep statistics on success/fail of connect attempts; they're published
2190 by kill -USR1 currently.
2191 - Add a RunTesting option to try to learn link state by creating test
2192 circuits, even when SocksPort is off.
2193 - Remove unused open circuits when there are too many.
2196 Changes in version 0.0.2 - 2004-03-19
2197 - Include strlcpy and strlcat for safer string ops
2198 - define INADDR_NONE so we compile (but still not run) on solaris
2201 Changes in version 0.0.2pre27 - 2004-03-14
2203 - Allow internal tor networks (we were rejecting internal IPs,
2204 now we allow them if they're set explicitly).
2205 - And fix a few endian issues.
2208 Changes in version 0.0.2pre26 - 2004-03-14
2210 - If a stream times out after 15s without a connected cell, don't
2211 try that circuit again: try a new one.
2212 - Retry streams at most 4 times. Then give up.
2213 - When a dirserver gets a descriptor from an unknown router, it
2214 logs its fingerprint (so the dirserver operator can choose to
2215 accept it even without mail from the server operator).
2216 - Inform unapproved servers when we reject their descriptors.
2217 - Make tor build on Windows again. It works as a client, who knows
2219 - Clearer instructions in the torrc for how to set up a server.
2220 - Be more efficient about reading fd's when our global token bucket
2221 (used for rate limiting) becomes empty.
2223 - Stop asserting that computers always go forward in time. It's
2225 - When we sent a cell (e.g. destroy) and then marked an OR connection
2226 expired, we might close it before finishing a flush if the other
2227 side isn't reading right then.
2228 - Don't allow dirservers to start if they haven't defined
2230 - We were caching transient dns failures. Oops.
2231 - Prevent servers from publishing an internal IP as their address.
2232 - Address a strcat vulnerability in circuit.c
2235 Changes in version 0.0.2pre25 - 2004-03-04
2237 - Put the OR's IP in its router descriptor, not its fqdn. That way
2238 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2241 - If the user typed in an address that didn't resolve, the server
2245 Changes in version 0.0.2pre24 - 2004-03-03
2247 - Fix an assertion failure in dns.c, where we were trying to dequeue
2248 a pending dns resolve even if it wasn't pending
2249 - Fix a spurious socks5 warning about still trying to write after the
2250 connection is finished.
2251 - Hold certain marked_for_close connections open until they're finished
2252 flushing, rather than losing bytes by closing them too early.
2253 - Correctly report the reason for ending a stream
2254 - Remove some duplicate calls to connection_mark_for_close
2255 - Put switch_id and start_daemon earlier in the boot sequence, so it
2256 will actually try to chdir() to options.DataDirectory
2257 - Make 'make test' exit(1) if a test fails; fix some unit tests
2258 - Make tor fail when you use a config option it doesn't know about,
2259 rather than warn and continue.
2260 - Make --version work
2261 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2264 Changes in version 0.0.2pre23 - 2004-02-29
2266 - Print a statement when the first circ is finished, so the user
2268 - If a relay cell is unrecognized at the end of the circuit,
2269 send back a destroy. (So attacks to mutate cells are more
2271 - New config option 'excludenodes' to avoid certain nodes for circuits.
2272 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2273 so you can collect coredumps there.
2275 - Fix a bug in tls flushing where sometimes data got wedged and
2276 didn't flush until more data got sent. Hopefully this bug was
2277 a big factor in the random delays we were seeing.
2278 - Make 'connected' cells include the resolved IP, so the client
2279 dns cache actually gets populated.
2280 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2281 - When we time-out on a stream and detach from the circuit, send an
2282 end cell down it first.
2283 - Only warn about an unknown router (in exitnodes, entrynodes,
2284 excludenodes) after we've fetched a directory.
2287 Changes in version 0.0.2pre22 - 2004-02-26
2289 - Servers publish less revealing uname information in descriptors.
2290 - More memory tracking and assertions, to crash more usefully when
2292 - If the default torrc isn't there, just use some default defaults.
2293 Plus provide an internal dirservers file if they don't have one.
2294 - When the user tries to use Tor as an http proxy, give them an http
2295 501 failure explaining that we're a socks proxy.
2296 - Dump a new router.desc on hup, to help confused people who change
2297 their exit policies and then wonder why router.desc doesn't reflect
2299 - Clean up the generic tor.sh init script that we ship with.
2301 - If the exit stream is pending on the resolve, and a destroy arrives,
2302 then the stream wasn't getting removed from the pending list. I
2303 think this was the one causing recent server crashes.
2304 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2305 - When it couldn't resolve any dirservers, it was useless from then on.
2306 Now it reloads the RouterFile (or default dirservers) if it has no
2308 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2309 many users don't even *have* a /usr/local/sbin/.
2312 Changes in version 0.0.2pre21 - 2004-02-18
2314 - There's a ChangeLog file that actually reflects the changelog.
2315 - There's a 'torify' wrapper script, with an accompanying
2316 tor-tsocks.conf, that simplifies the process of using tsocks for
2317 tor. It even has a man page.
2318 - The tor binary gets installed to sbin rather than bin now.
2319 - Retry streams where the connected cell hasn't arrived in 15 seconds
2320 - Clean up exit policy handling -- get the default out of the torrc,
2321 so we can update it without forcing each server operator to fix
2323 - Allow imaps and pop3s in default exit policy
2325 - Prevent picking middleman nodes as the last node in the circuit
2328 Changes in version 0.0.2pre20 - 2004-01-30
2330 - We now have a deb package, and it's in debian unstable. Go to
2332 - I've split the TotalBandwidth option into BandwidthRate (how many
2333 bytes per second you want to allow, long-term) and
2334 BandwidthBurst (how many bytes you will allow at once before the cap
2335 kicks in). This better token bucket approach lets you, say, set
2336 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2337 performance while not exceeding your monthly bandwidth quota.
2338 - Push out a tls record's worth of data once you've got it, rather
2339 than waiting until you've read everything waiting to be read. This
2340 may improve performance by pipelining better. We'll see.
2341 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2342 from failed circuits (if they haven't been connected yet) and attach
2344 - Expire old streams that haven't managed to connect. Some day we'll
2345 have them reattach to new circuits instead.
2348 - Fix several memory leaks that were causing servers to become bloated
2350 - Fix a few very rare assert triggers. A few more remain.
2351 - Setuid to User _before_ complaining about running as root.
2354 Changes in version 0.0.2pre19 - 2004-01-07
2356 - Fix deadlock condition in dns farm. We were telling a child to die by
2357 closing the parent's file descriptor to him. But newer children were
2358 inheriting the open file descriptor from the parent, and since they
2359 weren't closing it, the socket never closed, so the child never read
2360 eof, so he never knew to exit. Similarly, dns workers were holding
2361 open other sockets, leading to all sorts of chaos.
2362 - New cleaner daemon() code for forking and backgrounding.
2363 - If you log to a file, it now prints an entry at the top of the
2364 logfile so you know it's working.
2365 - The onionskin challenge length was 30 bytes longer than necessary.
2366 - Started to patch up the spec so it's not quite so out of date.
2369 Changes in version 0.0.2pre18 - 2004-01-02
2371 - Fix endian issues with the 'integrity' field in the relay header.
2372 - Fix a potential bug where connections in state
2373 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2376 Changes in version 0.0.2pre17 - 2003-12-30
2378 - Made --debuglogfile (or any second log file, actually) work.
2379 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2380 adversary could force us into an infinite loop.
2383 - Each onionskin handshake now includes a hash of the computed key,
2384 to prove the server's identity and help perfect forward secrecy.
2385 - Changed cell size from 256 to 512 bytes (working toward compatibility
2387 - Changed cell length to 2 bytes, and moved it to the relay header.
2388 - Implemented end-to-end integrity checking for the payloads of
2390 - Separated streamid from 'recognized' (otherwise circuits will get
2391 messed up when we try to have streams exit from the middle). We
2392 use the integrity-checking to confirm that a cell is addressed to
2394 - Randomize the initial circid and streamid values, so an adversary who
2395 breaks into a node can't learn how many circuits or streams have
2399 Changes in version 0.0.2pre16 - 2003-12-14
2401 - Fixed a bug that made HUP trigger an assert
2402 - Fixed a bug where a circuit that immediately failed wasn't being
2403 counted as a failed circuit in counting retries.
2406 - Now we close the circuit when we get a truncated cell: otherwise we're
2407 open to an anonymity attack where a bad node in the path truncates
2408 the circuit and then we open streams at him.
2409 - Add port ranges to exit policies
2410 - Add a conservative default exit policy
2411 - Warn if you're running tor as root
2412 - on HUP, retry OR connections and close/rebind listeners
2413 - options.EntryNodes: try these nodes first when picking the first node
2414 - options.ExitNodes: if your best choices happen to include any of
2415 your preferred exit nodes, you choose among just those preferred
2417 - options.ExcludedNodes: nodes that are never picked in path building
2420 Changes in version 0.0.2pre15 - 2003-12-03
2421 o Robustness and bugfixes:
2422 - Sometimes clients would cache incorrect DNS resolves, which would
2423 really screw things up.
2424 - An OP that goes offline would slowly leak all its sockets and stop
2426 - A wide variety of bugfixes in exit node selection, exit policy
2427 handling, and processing pending streams when a new circuit is
2429 - Pick nodes for a path only from those the directory says are up
2430 - Choose randomly from all running dirservers, not always the first one
2431 - Increase allowed http header size for directory fetch.
2432 - Stop writing to stderr (if we're daemonized it will be closed).
2433 - Enable -g always, so cores will be more useful to me.
2434 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2437 - Wrote a man page. It lists commonly used options.
2440 - Change default loglevel to warn.
2441 - Make PidFile default to null rather than littering in your CWD.
2442 - OnionRouter config option is now obsolete. Instead it just checks
2444 - Moved to a single unified torrc file for both clients and servers.
2447 Changes in version 0.0.2pre14 - 2003-11-29
2448 o Robustness and bugfixes:
2449 - Force the admin to make the DataDirectory himself
2450 - to get ownership/permissions right
2451 - so clients no longer make a DataDirectory and then never use it
2452 - fix bug where a client who was offline for 45 minutes would never
2453 pull down a directory again
2454 - fix (or at least hide really well) the dns assert bug that was
2455 causing server crashes
2456 - warnings and improved robustness wrt clockskew for certs
2457 - use the native daemon(3) to daemonize, when available
2458 - exit if bind() fails
2459 - exit if neither socksport nor orport is defined
2460 - include our own tor_timegm (Win32 doesn't have its own)
2461 - bugfix for win32 with lots of connections
2462 - fix minor bias in PRNG
2463 - make dirserver more robust to corrupt cached directory
2466 - Wrote the design document (woo)
2468 o Circuit building and exit policies:
2469 - Circuits no longer try to use nodes that the directory has told them
2471 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2472 bitcounts (18.0.0.0/8).
2473 - Make AP connections standby for a circuit if no suitable circuit
2474 exists, rather than failing
2475 - Circuits choose exit node based on addr/port, exit policies, and
2476 which AP connections are standing by
2477 - Bump min pathlen from 2 to 3
2478 - Relay end cells have a payload to describe why the stream ended.
2479 - If the stream failed because of exit policy, try again with a new
2481 - Clients have a dns cache to remember resolved addresses.
2482 - Notice more quickly when we have no working circuits
2485 - APPort is now called SocksPort
2486 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2488 - RecommendedVersions is now a config variable rather than
2489 hardcoded (for dirservers)
2490 - Reloads config on HUP
2491 - Usage info on -h or --help
2492 - If you set User and Group config vars, it'll setu/gid to them.
2494 Changes in version 0.0.2pre13 - 2003-10-19
2495 o General stability:
2496 - SSL_write no longer fails when it returns WANTWRITE and the number
2497 of bytes in the buf has changed by the next SSL_write call.
2498 - Fix segfault fetching directory when network is down
2499 - Fix a variety of minor memory leaks
2500 - Dirservers reload the fingerprints file on HUP, so I don't have
2501 to take down the network when I approve a new router
2502 - Default server config file has explicit Address line to specify fqdn
2505 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2506 - Make listener connections not ever alloc bufs
2508 o Autoconf improvements:
2509 - don't clobber an external CFLAGS in ./configure
2510 - Make install now works
2511 - create var/lib/tor on make install
2512 - autocreate a tor.sh initscript to help distribs
2513 - autocreate the torrc and sample-server-torrc with correct paths
2515 o Log files and Daemonizing now work:
2516 - If --DebugLogFile is specified, log to it at -l debug
2517 - If --LogFile is specified, use it instead of commandline
2518 - If --RunAsDaemon is set, tor forks and backgrounds on startup