1 Changes in version 0.0.9.1 - 2004-12-15
3 - Make hibernation actually work.
4 - Make HashedControlPassword config option work.
5 - When we're reporting event circuit status to a controller,
6 don't use the stream status code.
9 Changes in version 0.0.9 - 2004-12-12
10 o Bugfixes on 0.0.8.1 (Crashes and asserts):
11 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
12 write() call will fail and we handle it there.
13 - When we run out of disk space, or other log writing error, don't
14 crash. Just stop logging to that log and continue.
15 - Fix isspace() and friends so they still make Solaris happy
16 but also so they don't trigger asserts on win32.
17 - Fix assert failure on malformed socks4a requests.
18 - Fix an assert bug where a hidden service provider would fail if
19 the first hop of his rendezvous circuit was down.
20 - Better handling of size_t vs int, so we're more robust on 64
23 o Bugfixes on 0.0.8.1 (Win32):
24 - Make windows sockets actually non-blocking (oops), and handle
25 win32 socket errors better.
26 - Fix parse_iso_time on platforms without strptime (eg win32).
27 - win32: when being multithreaded, leave parent fdarray open.
28 - Better handling of winsock includes on non-MSV win32 compilers.
29 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
31 - Make unit tests work on win32.
33 o Bugfixes on 0.0.8.1 (Path selection and streams):
34 - Calculate timeout for waiting for a connected cell from the time
35 we sent the begin cell, not from the time the stream started. If
36 it took a long time to establish the circuit, we would time out
37 right after sending the begin cell.
38 - Fix router_compare_addr_to_addr_policy: it was not treating a port
39 of * as always matching, so we were picking reject *:* nodes as
41 - When read() failed on a stream, we would close it without sending
42 back an end. So 'connection refused' would simply be ignored and
43 the user would get no response.
44 - Stop a sigpipe: when an 'end' cell races with eof from the app,
45 we shouldn't hold-open-until-flush if the eof arrived first.
46 - Let resolve conns retry/expire also, rather than sticking around
48 - Fix more dns related bugs: send back resolve_failed and end cells
49 more reliably when the resolve fails, rather than closing the
50 circuit and then trying to send the cell. Also attach dummy resolve
51 connections to a circuit *before* calling dns_resolve(), to fix
52 a bug where cached answers would never be sent in RESOLVED cells.
54 o Bugfixes on 0.0.8.1 (Circuits):
55 - Finally fix a bug that's been plaguing us for a year:
56 With high load, circuit package window was reaching 0. Whenever
57 we got a circuit-level sendme, we were reading a lot on each
58 socket, but only writing out a bit. So we would eventually reach
59 eof. This would be noticed and acted on even when there were still
60 bytes sitting in the inbuf.
61 - Use identity comparison, not nickname comparison, to choose which
62 half of circuit-ID-space each side gets to use. This is needed
63 because sometimes we think of a router as a nickname, and sometimes
64 as a hex ID, and we can't predict what the other side will do.
66 o Bugfixes on 0.0.8.1 (Other):
67 - Fix a whole slew of memory leaks.
68 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
69 - If we are using select, make sure we stay within FD_SETSIZE.
70 - When poll() is interrupted, we shouldn't believe the revents values.
71 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
72 and smartlist_len, which are two major profiling offenders.
73 - If do_hup fails, actually notice.
74 - Flush the log file descriptor after we print "Tor opening log file",
75 so we don't see those messages days later.
76 - Hidden service operators now correctly handle version 1 style
77 INTRODUCE1 cells (nobody generates them still, so not a critical
79 - Handle more errnos from accept() without closing the listener.
80 Some OpenBSD machines were closing their listeners because
81 they ran out of file descriptors.
82 - Some people had wrapped their tor client/server in a script
83 that would restart it whenever it died. This did not play well
84 with our "shut down if your version is obsolete" code. Now people
85 don't fetch a new directory if their local cached version is
87 - Make our autogen.sh work on ksh as well as bash.
88 - Better torrc example lines for dirbindaddress and orbindaddress.
89 - Improved bounds checking on parsed ints (e.g. config options and
90 the ones we find in directories.)
91 - Stop using separate defaults for no-config-file and
92 empty-config-file. Now you have to explicitly turn off SocksPort,
93 if you don't want it open.
94 - We were starting to daemonize before we opened our logs, so if
95 there were any problems opening logs, we would complain to stderr,
96 which wouldn't work, and then mysteriously exit.
97 - If a verified OR connects to us before he's uploaded his descriptor,
98 or we verify him and hup but he still has the original TLS
99 connection, then conn->nickname is still set like he's unverified.
101 o Code security improvements, inspired by Ilja:
102 - tor_snprintf wrapper over snprintf with consistent (though not C99)
104 - Replace sprintf with tor_snprintf. (I think they were all safe, but
106 - Replace strcpy/strncpy with strlcpy in more places.
107 - Avoid strcat; use tor_snprintf or strlcat instead.
109 o Features (circuits and streams):
110 - New circuit building strategy: keep a list of ports that we've
111 used in the past 6 hours, and always try to have 2 circuits open
112 or on the way that will handle each such port. Seed us with port
113 80 so web users won't complain that Tor is "slow to start up".
114 - Make kill -USR1 dump more useful stats about circuits.
115 - When warning about retrying or giving up, print the address, so
116 the user knows which one it's talking about.
117 - If you haven't used a clean circuit in an hour, throw it away,
118 just to be on the safe side. (This means after 6 hours a totally
119 unused Tor client will have no circuits open.)
120 - Support "foo.nickname.exit" addresses, to let Alice request the
121 address "foo" as viewed by exit node "nickname". Based on a patch
123 - If your requested entry or exit node has advertised bandwidth 0,
125 - Be more greedy about filling up relay cells -- we try reading again
126 once we've processed the stuff we read, in case enough has arrived
127 to fill the last cell completely.
128 - Refuse application socks connections to port 0.
129 - Use only 0.0.9pre1 and later servers for resolve cells.
131 o Features (bandwidth):
132 - Hibernation: New config option "AccountingMax" lets you
133 set how many bytes per month (in each direction) you want to
134 allow your server to consume. Rather than spreading those
135 bytes out evenly over the month, we instead hibernate for some
136 of the month and pop up at a deterministic time, work until
137 the bytes are consumed, then hibernate again. Config option
138 "MonthlyAccountingStart" lets you specify which day of the month
139 your billing cycle starts on.
140 - Implement weekly/monthly/daily accounting: now you specify your
141 hibernation properties by
142 AccountingMax N bytes|KB|MB|GB|TB
143 AccountingStart day|week|month [day] HH:MM
144 Defaults to "month 1 0:00".
145 - Let bandwidth and interval config options be specified as 5 bytes,
146 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
148 o Features (directories):
149 - New "router-status" line in directory, to better bind each verified
150 nickname to its identity key.
151 - Clients can ask dirservers for /dir.z to get a compressed version
152 of the directory. Only works for servers running 0.0.9, of course.
153 - Make clients cache directories and use them to seed their router
154 lists at startup. This means clients have a datadir again.
155 - Respond to content-encoding headers by trying to uncompress as
157 - Clients and servers now fetch running-routers; cache
158 running-routers; compress running-routers; serve compressed
160 - Make moria2 advertise a dirport of 80, so people behind firewalls
161 will be able to get a directory.
163 - Dirservers translate requests for http://%s:%d/x to /x
164 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
165 be routed through this host.
166 - Clients ask for /tor/x rather than /x for new enough dirservers.
167 This way we can one day coexist peacefully with apache.
168 - Clients specify a "Host: %s%d" http header, to be compatible
169 with more proxies, and so running squid on an exit node can work.
170 - Protect dirservers from overzealous descriptor uploading -- wait
171 10 seconds after directory gets dirty, before regenerating.
173 o Features (packages and install):
174 - Add NSI installer contributed by J Doe.
175 - Apply NT service patch from Osamu Fujino. Still needs more work.
176 - Commit VC6 and VC7 workspace/project files.
177 - Commit a tor.spec for making RPM files, with help from jbash.
178 - Add contrib/torctl.in contributed by Glenn Fink.
179 - Make expand_filename handle ~ and ~username.
180 - Use autoconf to enable largefile support where necessary. Use
181 ftello where available, since ftell can fail at 2GB.
182 - Ship src/win32/ in the tarball, so people can use it to build.
183 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
186 o Features (ui controller):
187 - Control interface: a separate program can now talk to your
188 client/server over a socket, and get/set config options, receive
189 notifications of circuits and streams starting/finishing/dying,
190 bandwidth used, etc. The next step is to get some GUIs working.
191 Let us know if you want to help out. See doc/control-spec.txt .
192 - Ship a contrib/tor-control.py as an example script to interact
193 with the control port.
194 - "tor --hash-password zzyxz" will output a salted password for
195 use in authenticating to the control interface.
196 - Implement the control-spec's SAVECONF command, to write your
197 configuration to torrc.
198 - Get cookie authentication for the controller closer to working.
199 - When set_conf changes our server descriptor, upload a new copy.
200 But don't upload it too often if there are frequent changes.
202 o Features (config and command-line):
203 - Deprecate unofficial config option abbreviations, and abbreviations
204 not on the command line.
205 - Configuration infrastructure support for warning on obsolete
207 - Give a slightly more useful output for "tor -h".
208 - Break DirFetchPostPeriod into:
209 - DirFetchPeriod for fetching full directory,
210 - StatusFetchPeriod for fetching running-routers,
211 - DirPostPeriod for posting server descriptor,
212 - RendPostPeriod for posting hidden service descriptors.
213 - New log format in config:
214 "Log minsev[-maxsev] stdout|stderr|syslog" or
215 "Log minsev[-maxsev] file /var/foo"
216 - DirPolicy config option, to let people reject incoming addresses
217 from their dirserver.
218 - "tor --list-fingerprint" will list your identity key fingerprint
220 - Make tor --version --version dump the cvs Id of every file.
221 - New 'MyFamily nick1,...' config option for a server to
222 specify other servers that shouldn't be used in the same circuit
223 with it. Only believed if nick1 also specifies us.
224 - New 'NodeFamily nick1,nick2,...' config option for a client to
225 specify nodes that it doesn't want to use in the same circuit.
226 - New 'Redirectexit pattern address:port' config option for a
227 server to redirect exit connections, e.g. to a local squid.
228 - Add "pass" target for RedirectExit, to make it easier to break
229 out of a sequence of RedirectExit rules.
230 - Make the dirservers file obsolete.
231 - Include a dir-signing-key token in directories to tell the
232 parsing entity which key is being used to sign.
233 - Remove the built-in bulky default dirservers string.
234 - New config option "Dirserver %s:%d [fingerprint]", which can be
235 repeated as many times as needed. If no dirservers specified,
236 default to moria1,moria2,tor26.
237 - Make 'Routerfile' config option obsolete.
238 - Discourage people from setting their dirfetchpostperiod more often
239 than once per minute.
242 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
244 - Accept *:706 (silc) in default exit policy.
245 - Implement new versioning format for post 0.1.
246 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
247 log more informatively.
248 - Check clock skew for verified servers, but allow unverified
249 servers and clients to have any clock skew.
250 - Make sure the hidden service descriptors are at a random offset
251 from each other, to hinder linkability.
252 - Clients now generate a TLS cert too, in preparation for having
253 them act more like real nodes.
254 - Add a pure-C tor-resolve implementation.
255 - Use getrlimit and friends to ensure we can reach MaxConn (currently
256 1024) file descriptors.
257 - Raise the max dns workers from 50 to 100.
260 Changes in version 0.0.8.1 - 2004-10-13
262 - Fix a seg fault that can be triggered remotely for Tor
263 clients/servers with an open dirport.
264 - Fix a rare assert trigger, where routerinfos for entries in
265 our cpath would expire while we're building the path.
266 - Fix a bug in OutboundBindAddress so it (hopefully) works.
267 - Fix a rare seg fault for people running hidden services on
268 intermittent connections.
269 - Fix a bug in parsing opt keywords with objects.
270 - Fix a stale pointer assert bug when a stream detaches and
272 - Fix a string format vulnerability (probably not exploitable)
273 in reporting stats locally.
274 - Fix an assert trigger: sometimes launching circuits can fail
275 immediately, e.g. because too many circuits have failed recently.
276 - Fix a compile warning on 64 bit platforms.
279 Changes in version 0.0.8 - 2004-08-25
281 - Made our unit tests compile again on OpenBSD 3.5, and tor
282 itself compile again on OpenBSD on a sparc64.
283 - We were neglecting milliseconds when logging on win32, so
284 everything appeared to happen at the beginning of each second.
285 - Check directory signature _before_ you decide whether you're
286 you're running an obsolete version and should exit.
287 - Check directory signature _before_ you parse the running-routers
288 list to decide who's running.
289 - Check return value of fclose while writing to disk, so we don't
290 end up with broken files when servers run out of disk space.
291 - Port it to SunOS 5.9 / Athena
292 - Fix two bugs in saving onion keys to disk when rotating, so
293 hopefully we'll get fewer people using old onion keys.
294 - Remove our mostly unused -- and broken -- hex_encode()
295 function. Use base16_encode() instead. (Thanks to Timo Lindfors
296 for pointing out this bug.)
297 - Only pick and establish intro points after we've gotten a
299 - Fix assert triggers: if the other side returns an address 0.0.0.0,
300 don't put it into the client dns cache.
301 - If a begin failed due to exit policy, but we believe the IP
302 address should have been allowed, switch that router to exitpolicy
303 reject *:* until we get our next directory.
306 - 'Extend' relay cell payloads now include the digest of the
307 intended next hop's identity key. Now we can verify that we're
308 extending to the right router, and also extend to routers we
309 hadn't heard of before.
312 - Tor nodes can now act as relays (with an advertised ORPort)
313 without being manually verified by the dirserver operators.
314 - Uploaded descriptors of unverified routers are now accepted
315 by the dirservers, and included in the directory.
316 - Verified routers are listed by nickname in the running-routers
317 list; unverified routers are listed as "$<fingerprint>".
318 - We now use hash-of-identity-key in most places rather than
319 nickname or addr:port, for improved security/flexibility.
320 - AllowUnverifiedNodes config option to let circuits choose no-name
321 routers in entry,middle,exit,introduction,rendezvous positions.
322 Allow middle and rendezvous positions by default.
323 - When picking unverified routers, skip those with low uptime and/or
324 low bandwidth, depending on what properties you care about.
325 - ClientOnly option for nodes that never want to become servers.
327 - "AuthoritativeDir 1" option for the official dirservers.
328 - Now other nodes (clients and servers) will cache the latest
329 directory they've pulled down.
330 - They can enable their DirPort to serve it to others.
331 - Clients will pull down a directory from any node with an open
332 DirPort, and check the signature/timestamp correctly.
333 - Authoritative dirservers now fetch directories from other
334 authdirservers, to stay better synced.
335 - Running-routers list tells who's down also, along with noting
336 if they're verified (listed by nickname) or unverified (listed
338 - Allow dirservers to serve running-router list separately.
340 - You can now fetch $DIRURL/running-routers to get just the
341 running-routers line, not the whole descriptor list. (But
342 clients don't use this yet.)
343 - Clients choose nodes proportional to advertised bandwidth.
344 - Clients avoid using nodes with low uptime as introduction points.
345 - Handle servers with dynamic IP addresses: don't just replace
346 options->Address with the resolved one at startup, and
347 detect our address right before we make a routerinfo each time.
348 - 'FascistFirewall' option to pick dirservers and ORs on specific
349 ports; plus 'FirewallPorts' config option to tell FascistFirewall
350 which ports are open. (Defaults to 80,443)
351 - Try other dirservers immediately if the one you try is down. This
352 should tolerate down dirservers better now.
353 - ORs connect-on-demand to other ORs
354 - If you get an extend cell to an OR you're not connected to,
355 connect, handshake, and forward the create cell.
356 - The authoritative dirservers stay connected to everybody,
357 and everybody stays connected to 0.0.7 servers, but otherwise
358 clients/servers expire unused connections after 5 minutes.
359 - When servers get a sigint, they delay 30 seconds (refusing new
360 connections) then exit. A second sigint causes immediate exit.
361 - File and name management:
362 - Look for .torrc if no CONFDIR "torrc" is found.
363 - If no datadir is defined, then choose, make, and secure ~/.tor
365 - If torrc not found, exitpolicy reject *:*.
366 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
367 - If no nickname is defined, derive default from hostname.
368 - Rename secret key files, e.g. identity.key -> secret_id_key,
369 to discourage people from mailing their identity key to tor-ops.
370 - Refuse to build a circuit before the directory has arrived --
371 it won't work anyway, since you won't know the right onion keys
373 - Parse tor version numbers so we can do an is-newer-than check
374 rather than an is-in-the-list check.
375 - New socks command 'resolve', to let us shim gethostbyname()
377 - A 'tor_resolve' script to access the socks resolve functionality.
378 - A new socks-extensions.txt doc file to describe our
379 interpretation and extensions to the socks protocols.
380 - Add a ContactInfo option, which gets published in descriptor.
381 - Write tor version at the top of each log file
382 - New docs in the tarball:
384 - Document that you should proxy your SSL traffic too.
385 - Log a warning if the user uses an unsafe socks variant, so people
386 are more likely to learn about privoxy or socat.
387 - Log a warning if you're running an unverified server, to let you
388 know you might want to get it verified.
389 - Change the default exit policy to reject the default edonkey,
390 kazaa, gnutella ports.
391 - Add replace_file() to util.[ch] to handle win32's rename().
392 - Publish OR uptime in descriptor (and thus in directory) too.
393 - Remember used bandwidth (both in and out), and publish 15-minute
394 snapshots for the past day into our descriptor.
395 - Be more aggressive about trying to make circuits when the network
396 has changed (e.g. when you unsuspend your laptop).
397 - Check for time skew on http headers; report date in response to
399 - If the entrynode config line has only one node, don't pick it as
401 - Add strict{entry|exit}nodes config options. If set to 1, then
402 we refuse to build circuits that don't include the specified entry
404 - OutboundBindAddress config option, to bind to a specific
405 IP address for outgoing connect()s.
406 - End truncated log entries (e.g. directories) with "[truncated]".
409 Changes in version 0.0.7.3 - 2004-08-12
410 o Stop dnsworkers from triggering an assert failure when you
411 ask them to resolve the host "".
414 Changes in version 0.0.7.2 - 2004-07-07
415 o A better fix for the 0.0.0.0 problem, that will hopefully
416 eliminate the remaining related assertion failures.
419 Changes in version 0.0.7.1 - 2004-07-04
420 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
421 since internally we use 0.0.0.0 to signify "not yet resolved".
424 Changes in version 0.0.7 - 2004-06-07
425 o Fixes for crashes and other obnoxious bugs:
426 - Fix an epipe bug: sometimes when directory connections failed
427 to connect, we would give them a chance to flush before closing
429 - When we detached from a circuit because of resolvefailed, we
430 would immediately try the same circuit twice more, and then
431 give up on the resolve thinking we'd tried three different
433 - Limit the number of intro circuits we'll attempt to build for a
434 hidden service per 15-minute period.
435 - Check recommended-software string *early*, before actually parsing
436 the directory. Thus we can detect an obsolete version and exit,
437 even if the new directory format doesn't parse.
438 o Fixes for security bugs:
439 - Remember which nodes are dirservers when you startup, and if a
440 random OR enables his dirport, don't automatically assume he's
443 - Directory connections were asking the wrong poll socket to
444 start writing, and not asking themselves to start writing.
445 - When we detached from a circuit because we sent a begin but
446 didn't get a connected, we would use it again the first time;
447 but after that we would correctly switch to a different one.
448 - Stop warning when the first onion decrypt attempt fails; they
449 will sometimes legitimately fail now that we rotate keys.
450 - Override unaligned-access-ok check when $host_cpu is ia64 or
451 arm. Apparently they allow it but the kernel whines.
452 - Dirservers try to reconnect periodically too, in case connections
454 - Fix some memory leaks in directory servers.
455 - Allow backslash in Win32 filenames.
456 - Made Tor build complain-free on FreeBSD, hopefully without
457 breaking other BSD builds. We'll see.
458 - Check directory signatures based on name of signer, not on whom
459 we got the directory from. This will let us cache directories more
461 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
464 - Doxygen markup on all functions and global variables.
465 - Make directory functions update routerlist, not replace it. So
466 now directory disagreements are not so critical a problem.
467 - Remove the upper limit on number of descriptors in a dirserver's
468 directory (not that we were anywhere close).
469 - Allow multiple logfiles at different severity ranges.
470 - Allow *BindAddress to specify ":port" rather than setting *Port
471 separately. Allow multiple instances of each BindAddress config
472 option, so you can bind to multiple interfaces if you want.
473 - Allow multiple exit policy lines, which are processed in order.
474 Now we don't need that huge line with all the commas in it.
475 - Enable accept/reject policies on SOCKS connections, so you can bind
476 to 0.0.0.0 but still control who can use your OP.
477 - Updated the man page to reflect these features.
480 Changes in version 0.0.6.2 - 2004-05-16
481 o Our integrity-checking digest was checking only the most recent cell,
482 not the previous cells like we'd thought.
483 Thanks to Stefan Mark for finding the flaw!
486 Changes in version 0.0.6.1 - 2004-05-06
487 o Fix two bugs in our AES counter-mode implementation (this affected
488 onion-level stream encryption, but not TLS-level). It turns
489 out we were doing something much more akin to a 16-character
490 polyalphabetic cipher. Oops.
491 Thanks to Stefan Mark for finding the flaw!
492 o Retire moria3 as a directory server, and add tor26 as a directory
496 Changes in version 0.0.6 - 2004-05-02
498 - Hidden services and rendezvous points are implemented. Go to
499 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
500 hidden services. (This only works via a socks4a proxy such as
501 Privoxy, and currently it's quite slow.)
502 - We now rotate link (tls context) keys and onion keys.
503 - CREATE cells now include oaep padding, so you can tell
504 if you decrypted them correctly.
505 - Retry stream correctly when we fail to connect because of
506 exit-policy-reject (should try another) or can't-resolve-address.
507 - When we hup a dirserver and we've *removed* a server from the
508 approved-routers list, now we remove that server from the
509 in-memory directories too.
510 - Add bandwidthburst to server descriptor.
511 - Directories now say which dirserver signed them.
512 - Use a tor_assert macro that logs failed assertions too.
513 - Since we don't support truncateds much, don't bother sending them;
515 - Fetch randomness from /dev/urandom better (not via fopen/fread)
516 - Better debugging for tls errors
517 - Set Content-Type on the directory and hidserv descriptor.
518 - Remove IVs from cipher code, since AES-ctr has none.
520 - Fix an assert trigger for exit nodes that's been plaguing us since
521 the days of 0.0.2prexx (thanks weasel!)
522 - Fix a bug where we were closing tls connections intermittently.
523 It turns out openssl keeps its errors around -- so if an error
524 happens, and you don't ask about it, and then another openssl
525 operation happens and succeeds, and you ask if there was an error,
526 it tells you about the first error.
527 - Fix a bug that's been lurking since 27 may 03 (!)
528 When passing back a destroy cell, we would use the wrong circ id.
529 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
530 - Some versions of openssl have an SSL_pending function that erroneously
531 returns bytes when there is a non-application record pending.
532 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
533 o We were using an array of length zero in a few places.
534 o Win32's gethostbyname can't resolve an IP to an IP.
535 o Win32's close can't close a socket.
536 o Handle windows socket errors correctly.
538 - check for <sys/limits.h> so we build on FreeBSD again, and
539 <machine/limits.h> for NetBSD.
542 Changes in version 0.0.5 - 2004-03-30
543 o Install torrc as torrc.sample -- we no longer clobber your
545 o Fix mangled-state bug in directory fetching (was causing sigpipes).
546 o Only build circuits after we've fetched the directory: clients were
547 using only the directory servers before they'd fetched a directory.
548 This also means longer startup time; so it goes.
549 o Fix an assert trigger where an OP would fail to handshake, and we'd
550 expect it to have a nickname.
551 o Work around a tsocks bug: do a socks reject when AP connection dies
552 early, else tsocks goes into an infinite loop.
553 o Hold socks connection open until reply is flushed (if possible)
554 o Make exit nodes resolve IPs to IPs immediately, rather than asking
555 the dns farm to do it.
556 o Fix c99 aliasing warnings in rephist.c
557 o Don't include server descriptors that are older than 24 hours in the
559 o Give socks 'reject' replies their whole 15s to attempt to flush,
560 rather than seeing the 60s timeout and assuming the flush had failed.
561 o Clean automake droppings from the cvs repository
562 o Add in a 'notice' log level for things the operator should hear
563 but that aren't warnings
566 Changes in version 0.0.4 - 2004-03-26
567 o When connecting to a dirserver or OR and the network is down,
571 Changes in version 0.0.3 - 2004-03-26
572 o Warn and fail if server chose a nickname with illegal characters
573 o Port to Solaris and Sparc:
574 - include missing header fcntl.h
575 - have autoconf find -lsocket -lnsl automatically
576 - deal with hardware word alignment
577 - make uname() work (solaris has a different return convention)
578 - switch from using signal() to sigaction()
579 o Preliminary work on reputation system:
580 - Keep statistics on success/fail of connect attempts; they're published
581 by kill -USR1 currently.
582 - Add a RunTesting option to try to learn link state by creating test
583 circuits, even when SocksPort is off.
584 - Remove unused open circuits when there are too many.
587 Changes in version 0.0.2 - 2004-03-19
588 - Include strlcpy and strlcat for safer string ops
589 - define INADDR_NONE so we compile (but still not run) on solaris
592 Changes in version 0.0.2pre27 - 2004-03-14
594 - Allow internal tor networks (we were rejecting internal IPs,
595 now we allow them if they're set explicitly).
596 - And fix a few endian issues.
599 Changes in version 0.0.2pre26 - 2004-03-14
601 - If a stream times out after 15s without a connected cell, don't
602 try that circuit again: try a new one.
603 - Retry streams at most 4 times. Then give up.
604 - When a dirserver gets a descriptor from an unknown router, it
605 logs its fingerprint (so the dirserver operator can choose to
606 accept it even without mail from the server operator).
607 - Inform unapproved servers when we reject their descriptors.
608 - Make tor build on Windows again. It works as a client, who knows
610 - Clearer instructions in the torrc for how to set up a server.
611 - Be more efficient about reading fd's when our global token bucket
612 (used for rate limiting) becomes empty.
614 - Stop asserting that computers always go forward in time. It's
616 - When we sent a cell (e.g. destroy) and then marked an OR connection
617 expired, we might close it before finishing a flush if the other
618 side isn't reading right then.
619 - Don't allow dirservers to start if they haven't defined
621 - We were caching transient dns failures. Oops.
622 - Prevent servers from publishing an internal IP as their address.
623 - Address a strcat vulnerability in circuit.c
626 Changes in version 0.0.2pre25 - 2004-03-04
628 - Put the OR's IP in its router descriptor, not its fqdn. That way
629 we'll stop being stalled by gethostbyname for nodes with flaky dns,
632 - If the user typed in an address that didn't resolve, the server
636 Changes in version 0.0.2pre24 - 2004-03-03
638 - Fix an assertion failure in dns.c, where we were trying to dequeue
639 a pending dns resolve even if it wasn't pending
640 - Fix a spurious socks5 warning about still trying to write after the
641 connection is finished.
642 - Hold certain marked_for_close connections open until they're finished
643 flushing, rather than losing bytes by closing them too early.
644 - Correctly report the reason for ending a stream
645 - Remove some duplicate calls to connection_mark_for_close
646 - Put switch_id and start_daemon earlier in the boot sequence, so it
647 will actually try to chdir() to options.DataDirectory
648 - Make 'make test' exit(1) if a test fails; fix some unit tests
649 - Make tor fail when you use a config option it doesn't know about,
650 rather than warn and continue.
651 - Make --version work
652 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
655 Changes in version 0.0.2pre23 - 2004-02-29
657 - Print a statement when the first circ is finished, so the user
659 - If a relay cell is unrecognized at the end of the circuit,
660 send back a destroy. (So attacks to mutate cells are more
662 - New config option 'excludenodes' to avoid certain nodes for circuits.
663 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
664 so you can collect coredumps there.
666 - Fix a bug in tls flushing where sometimes data got wedged and
667 didn't flush until more data got sent. Hopefully this bug was
668 a big factor in the random delays we were seeing.
669 - Make 'connected' cells include the resolved IP, so the client
670 dns cache actually gets populated.
671 - Disallow changing from ORPort=0 to ORPort>0 on hup.
672 - When we time-out on a stream and detach from the circuit, send an
673 end cell down it first.
674 - Only warn about an unknown router (in exitnodes, entrynodes,
675 excludenodes) after we've fetched a directory.
678 Changes in version 0.0.2pre22 - 2004-02-26
680 - Servers publish less revealing uname information in descriptors.
681 - More memory tracking and assertions, to crash more usefully when
683 - If the default torrc isn't there, just use some default defaults.
684 Plus provide an internal dirservers file if they don't have one.
685 - When the user tries to use Tor as an http proxy, give them an http
686 501 failure explaining that we're a socks proxy.
687 - Dump a new router.desc on hup, to help confused people who change
688 their exit policies and then wonder why router.desc doesn't reflect
690 - Clean up the generic tor.sh init script that we ship with.
692 - If the exit stream is pending on the resolve, and a destroy arrives,
693 then the stream wasn't getting removed from the pending list. I
694 think this was the one causing recent server crashes.
695 - Use a more robust poll on OSX 10.3, since their poll is flaky.
696 - When it couldn't resolve any dirservers, it was useless from then on.
697 Now it reloads the RouterFile (or default dirservers) if it has no
699 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
700 many users don't even *have* a /usr/local/sbin/.
703 Changes in version 0.0.2pre21 - 2004-02-18
705 - There's a ChangeLog file that actually reflects the changelog.
706 - There's a 'torify' wrapper script, with an accompanying
707 tor-tsocks.conf, that simplifies the process of using tsocks for
708 tor. It even has a man page.
709 - The tor binary gets installed to sbin rather than bin now.
710 - Retry streams where the connected cell hasn't arrived in 15 seconds
711 - Clean up exit policy handling -- get the default out of the torrc,
712 so we can update it without forcing each server operator to fix
714 - Allow imaps and pop3s in default exit policy
716 - Prevent picking middleman nodes as the last node in the circuit
719 Changes in version 0.0.2pre20 - 2004-01-30
721 - We now have a deb package, and it's in debian unstable. Go to
723 - I've split the TotalBandwidth option into BandwidthRate (how many
724 bytes per second you want to allow, long-term) and
725 BandwidthBurst (how many bytes you will allow at once before the cap
726 kicks in). This better token bucket approach lets you, say, set
727 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
728 performance while not exceeding your monthly bandwidth quota.
729 - Push out a tls record's worth of data once you've got it, rather
730 than waiting until you've read everything waiting to be read. This
731 may improve performance by pipelining better. We'll see.
732 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
733 from failed circuits (if they haven't been connected yet) and attach
735 - Expire old streams that haven't managed to connect. Some day we'll
736 have them reattach to new circuits instead.
739 - Fix several memory leaks that were causing servers to become bloated
741 - Fix a few very rare assert triggers. A few more remain.
742 - Setuid to User _before_ complaining about running as root.
745 Changes in version 0.0.2pre19 - 2004-01-07
747 - Fix deadlock condition in dns farm. We were telling a child to die by
748 closing the parent's file descriptor to him. But newer children were
749 inheriting the open file descriptor from the parent, and since they
750 weren't closing it, the socket never closed, so the child never read
751 eof, so he never knew to exit. Similarly, dns workers were holding
752 open other sockets, leading to all sorts of chaos.
753 - New cleaner daemon() code for forking and backgrounding.
754 - If you log to a file, it now prints an entry at the top of the
755 logfile so you know it's working.
756 - The onionskin challenge length was 30 bytes longer than necessary.
757 - Started to patch up the spec so it's not quite so out of date.
760 Changes in version 0.0.2pre18 - 2004-01-02
762 - Fix endian issues with the 'integrity' field in the relay header.
763 - Fix a potential bug where connections in state
764 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
767 Changes in version 0.0.2pre17 - 2003-12-30
769 - Made --debuglogfile (or any second log file, actually) work.
770 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
771 adversary could force us into an infinite loop.
774 - Each onionskin handshake now includes a hash of the computed key,
775 to prove the server's identity and help perfect forward secrecy.
776 - Changed cell size from 256 to 512 bytes (working toward compatibility
778 - Changed cell length to 2 bytes, and moved it to the relay header.
779 - Implemented end-to-end integrity checking for the payloads of
781 - Separated streamid from 'recognized' (otherwise circuits will get
782 messed up when we try to have streams exit from the middle). We
783 use the integrity-checking to confirm that a cell is addressed to
785 - Randomize the initial circid and streamid values, so an adversary who
786 breaks into a node can't learn how many circuits or streams have
790 Changes in version 0.0.2pre16 - 2003-12-14
792 - Fixed a bug that made HUP trigger an assert
793 - Fixed a bug where a circuit that immediately failed wasn't being
794 counted as a failed circuit in counting retries.
797 - Now we close the circuit when we get a truncated cell: otherwise we're
798 open to an anonymity attack where a bad node in the path truncates
799 the circuit and then we open streams at him.
800 - Add port ranges to exit policies
801 - Add a conservative default exit policy
802 - Warn if you're running tor as root
803 - on HUP, retry OR connections and close/rebind listeners
804 - options.EntryNodes: try these nodes first when picking the first node
805 - options.ExitNodes: if your best choices happen to include any of
806 your preferred exit nodes, you choose among just those preferred
808 - options.ExcludedNodes: nodes that are never picked in path building
811 Changes in version 0.0.2pre15 - 2003-12-03
812 o Robustness and bugfixes:
813 - Sometimes clients would cache incorrect DNS resolves, which would
814 really screw things up.
815 - An OP that goes offline would slowly leak all its sockets and stop
817 - A wide variety of bugfixes in exit node selection, exit policy
818 handling, and processing pending streams when a new circuit is
820 - Pick nodes for a path only from those the directory says are up
821 - Choose randomly from all running dirservers, not always the first one
822 - Increase allowed http header size for directory fetch.
823 - Stop writing to stderr (if we're daemonized it will be closed).
824 - Enable -g always, so cores will be more useful to me.
825 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
828 - Wrote a man page. It lists commonly used options.
831 - Change default loglevel to warn.
832 - Make PidFile default to null rather than littering in your CWD.
833 - OnionRouter config option is now obsolete. Instead it just checks
835 - Moved to a single unified torrc file for both clients and servers.
838 Changes in version 0.0.2pre14 - 2003-11-29
839 o Robustness and bugfixes:
840 - Force the admin to make the DataDirectory himself
841 - to get ownership/permissions right
842 - so clients no longer make a DataDirectory and then never use it
843 - fix bug where a client who was offline for 45 minutes would never
844 pull down a directory again
845 - fix (or at least hide really well) the dns assert bug that was
846 causing server crashes
847 - warnings and improved robustness wrt clockskew for certs
848 - use the native daemon(3) to daemonize, when available
849 - exit if bind() fails
850 - exit if neither socksport nor orport is defined
851 - include our own tor_timegm (Win32 doesn't have its own)
852 - bugfix for win32 with lots of connections
853 - fix minor bias in PRNG
854 - make dirserver more robust to corrupt cached directory
857 - Wrote the design document (woo)
859 o Circuit building and exit policies:
860 - Circuits no longer try to use nodes that the directory has told them
862 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
863 bitcounts (18.0.0.0/8).
864 - Make AP connections standby for a circuit if no suitable circuit
865 exists, rather than failing
866 - Circuits choose exit node based on addr/port, exit policies, and
867 which AP connections are standing by
868 - Bump min pathlen from 2 to 3
869 - Relay end cells have a payload to describe why the stream ended.
870 - If the stream failed because of exit policy, try again with a new
872 - Clients have a dns cache to remember resolved addresses.
873 - Notice more quickly when we have no working circuits
876 - APPort is now called SocksPort
877 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
879 - RecommendedVersions is now a config variable rather than
880 hardcoded (for dirservers)
881 - Reloads config on HUP
882 - Usage info on -h or --help
883 - If you set User and Group config vars, it'll setu/gid to them.
885 Changes in version 0.0.2pre13 - 2003-10-19
887 - SSL_write no longer fails when it returns WANTWRITE and the number
888 of bytes in the buf has changed by the next SSL_write call.
889 - Fix segfault fetching directory when network is down
890 - Fix a variety of minor memory leaks
891 - Dirservers reload the fingerprints file on HUP, so I don't have
892 to take down the network when I approve a new router
893 - Default server config file has explicit Address line to specify fqdn
896 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
897 - Make listener connections not ever alloc bufs
899 o Autoconf improvements:
900 - don't clobber an external CFLAGS in ./configure
901 - Make install now works
902 - create var/lib/tor on make install
903 - autocreate a tor.sh initscript to help distribs
904 - autocreate the torrc and sample-server-torrc with correct paths
906 o Log files and Daemonizing now work:
907 - If --DebugLogFile is specified, log to it at -l debug
908 - If --LogFile is specified, use it instead of commandline
909 - If --RunAsDaemon is set, tor forks and backgrounds on startup