1 Changes so far in 0.0.9:
3 o Bugfixes on 0.0.9pre4:
4 - Fix a seg fault in unit tests (doesn't affect main program).
5 - Fix an assert bug where a hidden service provider would fail if
6 the first hop of his rendezvous circuit was down.
7 - Hidden service operators now correctly handle version 1 style
8 INTRODUCE1 cells (nobody generates them still, so not a critical
10 - If do_hup fails, actually notice.
11 - Handle more errnos from accept() without closing the listener.
12 Some OpenBSD machines were closing their listeners because
13 they ran out of file descriptors.
14 - Send resolve cells to exit routers that are running a new
15 enough version of the resolve code to work right.
16 - Better handling of winsock includes on non-MSV win32 compilers.
17 - Some people had wrapped their tor client/server in a script
18 that would restart it whenever it died. This did not play well
19 with our "shut down if your version is obsolete" code. Now people
20 don't fetch a new directory if their local cached version is
22 - Make our autogen.sh work on ksh as well as bash.
25 - Hibernation: New config option "AccountingMaxKB" lets you
26 set how many KB per month you want to allow your server to
27 consume. Rather than spreading those bytes out evenly over the
28 month, we instead hibernate for most of the month and pop up
29 at a deterministic time, work until the bytes are consumed, then
30 hibernate again. Config option "MonthlyAccountingStart" lets you
31 specify which day of the month your billing cycle starts on.
32 - Control interface: a separate program can now talk to your
33 client/server over a socket, and get/set config options, receive
34 notifications of circuits and streams starting/finishing/dying,
35 bandwidth used, etc. The next step is to get some GUIs working.
36 Let us know if you want to help out. See doc/control-spec.txt .
37 - Ship a contrib/tor-control.py as an example script to interact
38 with the control port.
39 - "tor --hash-password zzyxz" will output a salted password for
40 use in authenticating to the control interface.
41 - New log format in config:
42 "Log minsev[-maxsev] stdout|stderr|syslog" or
43 "Log minsev[-maxsev] file /foo"
46 - DirPolicy config option, to let people reject incoming addresses
48 - "tor --list-fingerprint" will list your identity key fingerprint
50 - Add "pass" target for RedirectExit, to make it easier to break
51 out of a sequence of RedirectExit rules.
52 - Clients now generate a TLS cert too, in preparation for having
53 them act more like real nodes.
54 - Ship src/win32/ in the tarball, so people can use it to build.
55 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
57 - New "router-status" line in directory, to better bind each verified
58 nickname to its identity key.
59 - Deprecate unofficial config option abbreviations, and abbreviations
60 not on the command line.
61 - Add a pure-C tor-resolve implementation.
62 - Use getrlimit and friends to ensure we can reach MaxConn (currently
63 1024) file descriptors.
65 o Code security improvements, inspired by Ilja:
66 - Replace sprintf with snprintf. (I think they were all safe, but
68 - Replace strcpy/strncpy with strlcpy in more places.
69 - Avoid strcat; use snprintf or strlcat instead.
70 - snprintf wrapper with consistent (though not C99) overflow behavior.
73 o Bugfixes on 0.0.9pre3:
74 - Ignore fascistfirewall when uploading/downloading hidden service
75 descriptors, since we go through Tor for those; and when using
76 an HttpProxy, since we assume it can reach them all.
77 - When looking for an authoritative dirserver, use only the ones
78 configured at boot. Don't bother looking in the directory.
79 - If the server doesn't specify an exit policy, use the real default
80 exit policy, not reject *:*.
81 - The rest of the fix for get_default_conf_file() on older win32.
82 - Make 'Routerfile' config option obsolete.
85 - New 'MyFamily nick1,...' config option for a server to
86 specify other servers that shouldn't be used in the same circuit
87 with it. Only believed if nick1 also specifies us.
88 - New 'NodeFamily nick1,nick2,...' config option for a client to
89 specify nodes that it doesn't want to use in the same circuit.
90 - New 'Redirectexit pattern address:port' config option for a
91 server to redirect exit connections, e.g. to a local squid.
94 o Bugfixes on 0.0.8.1:
95 - Better torrc example lines for dirbindaddress and orbindaddress.
96 - Improved bounds checking on parsed ints (e.g. config options and
97 the ones we find in directories.)
98 - Better handling of size_t vs int, so we're more robust on 64
100 - Fix the rest of the bug where a newly started OR would appear
101 as unverified even after we've added his fingerprint and hupped
103 - Fix a bug from 0.0.7: when read() failed on a stream, we would
104 close it without sending back an end. So 'connection refused'
105 would simply be ignored and the user would get no response.
107 o Bugfixes on 0.0.9pre2:
108 - Serving the cached-on-disk directory to people is bad. We now
109 provide no directory until we've fetched a fresh one.
110 - Workaround for bug on windows where cached-directories get crlf
112 - Make get_default_conf_file() work on older windows too.
113 - If we write a *:* exit policy line in the descriptor, don't write
114 any more exit policy lines.
117 - Use only 0.0.9pre1 and later servers for resolve cells.
118 - Make the dirservers file obsolete.
119 - Include a dir-signing-key token in directories to tell the
120 parsing entity which key is being used to sign.
121 - Remove the built-in bulky default dirservers string.
122 - New config option "Dirserver %s:%d [fingerprint]", which can be
123 repeated as many times as needed. If no dirservers specified,
124 default to moria1,moria2,tor26.
125 - Make moria2 advertise a dirport of 80, so people behind firewalls
126 will be able to get a directory.
128 - Dirservers translate requests for http://%s:%d/x to /x
129 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
130 be routed through this host.
131 - Clients ask for /tor/x rather than /x for new enough dirservers.
132 This way we can one day coexist peacefully with apache.
133 - Clients specify a "Host: %s%d" http header, to be compatible
134 with more proxies, and so running squid on an exit node can work.
138 - Make fetching a cached directory work for 64-bit platforms too.
139 - Make zlib.h a required header, not an optional header.
143 - Stop using separate defaults for no-config-file and
144 empty-config-file. Now you have to explicitly turn off SocksPort,
145 if you don't want it open.
146 - Improve man page to mention more of the 0.0.8 features.
147 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
149 - Fix more dns related bugs: send back resolve_failed and end cells
150 more reliably when the resolve fails, rather than closing the
151 circuit and then trying to send the cell. Also attach dummy resolve
152 connections to a circuit *before* calling dns_resolve(), to fix
153 a bug where cached answers would never be sent in RESOLVED cells.
154 - When we run out of disk space, or other log writing error, don't
155 crash. Just stop logging to that log and continue.
156 - We were starting to daemonize before we opened our logs, so if
157 there were any problems opening logs, we would complain to stderr,
158 which wouldn't work, and then mysteriously exit.
159 - Fix a rare bug where sometimes a verified OR would connect to us
160 before he'd uploaded his descriptor, which would cause us to
161 assign conn->nickname as though he's unverified. Now we look through
162 the fingerprint list to see if he's there.
165 - Clients can ask dirservers for /dir.z to get a compressed version
166 of the directory. Only works for servers running 0.0.9, of course.
167 - Make clients cache directories and use them to seed their router
168 lists at startup. This means clients have a datadir again.
169 - Configuration infrastructure support for warning on obsolete
171 - Respond to content-encoding headers by trying to uncompress as
173 - Reply with a deflated directory when a client asks for "dir.z".
174 We could use allow-encodings instead, but allow-encodings isn't
175 specified in HTTP 1.0.
176 - Raise the max dns workers from 50 to 100.
177 - Discourage people from setting their dirfetchpostperiod more often
179 - Protect dirservers from overzealous descriptor uploading -- wait
180 10 seconds after directory gets dirty, before regenerating.
183 Changes in version 0.0.8.1 - 2004-10-13
185 - Fix a seg fault that can be triggered remotely for Tor
186 clients/servers with an open dirport.
187 - Fix a rare assert trigger, where routerinfos for entries in
188 our cpath would expire while we're building the path.
189 - Fix a bug in OutboundBindAddress so it (hopefully) works.
190 - Fix a rare seg fault for people running hidden services on
191 intermittent connections.
192 - Fix a bug in parsing opt keywords with objects.
193 - Fix a stale pointer assert bug when a stream detaches and
195 - Fix a string format vulnerability (probably not exploitable)
196 in reporting stats locally.
197 - Fix an assert trigger: sometimes launching circuits can fail
198 immediately, e.g. because too many circuits have failed recently.
199 - Fix a compile warning on 64 bit platforms.
202 Changes in version 0.0.8 - 2004-08-25
204 - Made our unit tests compile again on OpenBSD 3.5, and tor
205 itself compile again on OpenBSD on a sparc64.
206 - We were neglecting milliseconds when logging on win32, so
207 everything appeared to happen at the beginning of each second.
208 - Check directory signature _before_ you decide whether you're
209 you're running an obsolete version and should exit.
210 - Check directory signature _before_ you parse the running-routers
211 list to decide who's running.
212 - Check return value of fclose while writing to disk, so we don't
213 end up with broken files when servers run out of disk space.
214 - Port it to SunOS 5.9 / Athena
215 - Fix two bugs in saving onion keys to disk when rotating, so
216 hopefully we'll get fewer people using old onion keys.
217 - Remove our mostly unused -- and broken -- hex_encode()
218 function. Use base16_encode() instead. (Thanks to Timo Lindfors
219 for pointing out this bug.)
220 - Only pick and establish intro points after we've gotten a
222 - Fix assert triggers: if the other side returns an address 0.0.0.0,
223 don't put it into the client dns cache.
224 - If a begin failed due to exit policy, but we believe the IP
225 address should have been allowed, switch that router to exitpolicy
226 reject *:* until we get our next directory.
229 - 'Extend' relay cell payloads now include the digest of the
230 intended next hop's identity key. Now we can verify that we're
231 extending to the right router, and also extend to routers we
232 hadn't heard of before.
235 - Tor nodes can now act as relays (with an advertised ORPort)
236 without being manually verified by the dirserver operators.
237 - Uploaded descriptors of unverified routers are now accepted
238 by the dirservers, and included in the directory.
239 - Verified routers are listed by nickname in the running-routers
240 list; unverified routers are listed as "$<fingerprint>".
241 - We now use hash-of-identity-key in most places rather than
242 nickname or addr:port, for improved security/flexibility.
243 - AllowUnverifiedNodes config option to let circuits choose no-name
244 routers in entry,middle,exit,introduction,rendezvous positions.
245 Allow middle and rendezvous positions by default.
246 - When picking unverified routers, skip those with low uptime and/or
247 low bandwidth, depending on what properties you care about.
248 - ClientOnly option for nodes that never want to become servers.
250 - "AuthoritativeDir 1" option for the official dirservers.
251 - Now other nodes (clients and servers) will cache the latest
252 directory they've pulled down.
253 - They can enable their DirPort to serve it to others.
254 - Clients will pull down a directory from any node with an open
255 DirPort, and check the signature/timestamp correctly.
256 - Authoritative dirservers now fetch directories from other
257 authdirservers, to stay better synced.
258 - Running-routers list tells who's down also, along with noting
259 if they're verified (listed by nickname) or unverified (listed
261 - Allow dirservers to serve running-router list separately.
263 - You can now fetch $DIRURL/running-routers to get just the
264 running-routers line, not the whole descriptor list. (But
265 clients don't use this yet.)
266 - Clients choose nodes proportional to advertised bandwidth.
267 - Clients avoid using nodes with low uptime as introduction points.
268 - Handle servers with dynamic IP addresses: don't just replace
269 options->Address with the resolved one at startup, and
270 detect our address right before we make a routerinfo each time.
271 - 'FascistFirewall' option to pick dirservers and ORs on specific
272 ports; plus 'FirewallPorts' config option to tell FascistFirewall
273 which ports are open. (Defaults to 80,443)
274 - Try other dirservers immediately if the one you try is down. This
275 should tolerate down dirservers better now.
276 - ORs connect-on-demand to other ORs
277 - If you get an extend cell to an OR you're not connected to,
278 connect, handshake, and forward the create cell.
279 - The authoritative dirservers stay connected to everybody,
280 and everybody stays connected to 0.0.7 servers, but otherwise
281 clients/servers expire unused connections after 5 minutes.
282 - When servers get a sigint, they delay 30 seconds (refusing new
283 connections) then exit. A second sigint causes immediate exit.
284 - File and name management:
285 - Look for .torrc if no CONFDIR "torrc" is found.
286 - If no datadir is defined, then choose, make, and secure ~/.tor
288 - If torrc not found, exitpolicy reject *:*.
289 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
290 - If no nickname is defined, derive default from hostname.
291 - Rename secret key files, e.g. identity.key -> secret_id_key,
292 to discourage people from mailing their identity key to tor-ops.
293 - Refuse to build a circuit before the directory has arrived --
294 it won't work anyway, since you won't know the right onion keys
296 - Parse tor version numbers so we can do an is-newer-than check
297 rather than an is-in-the-list check.
298 - New socks command 'resolve', to let us shim gethostbyname()
300 - A 'tor_resolve' script to access the socks resolve functionality.
301 - A new socks-extensions.txt doc file to describe our
302 interpretation and extensions to the socks protocols.
303 - Add a ContactInfo option, which gets published in descriptor.
304 - Write tor version at the top of each log file
305 - New docs in the tarball:
307 - Document that you should proxy your SSL traffic too.
308 - Log a warning if the user uses an unsafe socks variant, so people
309 are more likely to learn about privoxy or socat.
310 - Log a warning if you're running an unverified server, to let you
311 know you might want to get it verified.
312 - Change the default exit policy to reject the default edonkey,
313 kazaa, gnutella ports.
314 - Add replace_file() to util.[ch] to handle win32's rename().
315 - Publish OR uptime in descriptor (and thus in directory) too.
316 - Remember used bandwidth (both in and out), and publish 15-minute
317 snapshots for the past day into our descriptor.
318 - Be more aggressive about trying to make circuits when the network
319 has changed (e.g. when you unsuspend your laptop).
320 - Check for time skew on http headers; report date in response to
322 - If the entrynode config line has only one node, don't pick it as
324 - Add strict{entry|exit}nodes config options. If set to 1, then
325 we refuse to build circuits that don't include the specified entry
327 - OutboundBindAddress config option, to bind to a specific
328 IP address for outgoing connect()s.
329 - End truncated log entries (e.g. directories) with "[truncated]".
332 Changes in version 0.0.7.3 - 2004-08-12
333 o Stop dnsworkers from triggering an assert failure when you
334 ask them to resolve the host "".
337 Changes in version 0.0.7.2 - 2004-07-07
338 o A better fix for the 0.0.0.0 problem, that will hopefully
339 eliminate the remaining related assertion failures.
342 Changes in version 0.0.7.1 - 2004-07-04
343 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
344 since internally we use 0.0.0.0 to signify "not yet resolved".
347 Changes in version 0.0.7 - 2004-06-07
348 o Fixes for crashes and other obnoxious bugs:
349 - Fix an epipe bug: sometimes when directory connections failed
350 to connect, we would give them a chance to flush before closing
352 - When we detached from a circuit because of resolvefailed, we
353 would immediately try the same circuit twice more, and then
354 give up on the resolve thinking we'd tried three different
356 - Limit the number of intro circuits we'll attempt to build for a
357 hidden service per 15-minute period.
358 - Check recommended-software string *early*, before actually parsing
359 the directory. Thus we can detect an obsolete version and exit,
360 even if the new directory format doesn't parse.
361 o Fixes for security bugs:
362 - Remember which nodes are dirservers when you startup, and if a
363 random OR enables his dirport, don't automatically assume he's
366 - Directory connections were asking the wrong poll socket to
367 start writing, and not asking themselves to start writing.
368 - When we detached from a circuit because we sent a begin but
369 didn't get a connected, we would use it again the first time;
370 but after that we would correctly switch to a different one.
371 - Stop warning when the first onion decrypt attempt fails; they
372 will sometimes legitimately fail now that we rotate keys.
373 - Override unaligned-access-ok check when $host_cpu is ia64 or
374 arm. Apparently they allow it but the kernel whines.
375 - Dirservers try to reconnect periodically too, in case connections
377 - Fix some memory leaks in directory servers.
378 - Allow backslash in Win32 filenames.
379 - Made Tor build complain-free on FreeBSD, hopefully without
380 breaking other BSD builds. We'll see.
381 - Check directory signatures based on name of signer, not on whom
382 we got the directory from. This will let us cache directories more
384 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
387 - Doxygen markup on all functions and global variables.
388 - Make directory functions update routerlist, not replace it. So
389 now directory disagreements are not so critical a problem.
390 - Remove the upper limit on number of descriptors in a dirserver's
391 directory (not that we were anywhere close).
392 - Allow multiple logfiles at different severity ranges.
393 - Allow *BindAddress to specify ":port" rather than setting *Port
394 separately. Allow multiple instances of each BindAddress config
395 option, so you can bind to multiple interfaces if you want.
396 - Allow multiple exit policy lines, which are processed in order.
397 Now we don't need that huge line with all the commas in it.
398 - Enable accept/reject policies on SOCKS connections, so you can bind
399 to 0.0.0.0 but still control who can use your OP.
400 - Updated the man page to reflect these features.
403 Changes in version 0.0.6.2 - 2004-05-16
404 o Our integrity-checking digest was checking only the most recent cell,
405 not the previous cells like we'd thought.
406 Thanks to Stefan Mark for finding the flaw!
409 Changes in version 0.0.6.1 - 2004-05-06
410 o Fix two bugs in our AES counter-mode implementation (this affected
411 onion-level stream encryption, but not TLS-level). It turns
412 out we were doing something much more akin to a 16-character
413 polyalphabetic cipher. Oops.
414 Thanks to Stefan Mark for finding the flaw!
415 o Retire moria3 as a directory server, and add tor26 as a directory
419 Changes in version 0.0.6 - 2004-05-02
421 - Hidden services and rendezvous points are implemented. Go to
422 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
423 hidden services. (This only works via a socks4a proxy such as
424 Privoxy, and currently it's quite slow.)
425 - We now rotate link (tls context) keys and onion keys.
426 - CREATE cells now include oaep padding, so you can tell
427 if you decrypted them correctly.
428 - Retry stream correctly when we fail to connect because of
429 exit-policy-reject (should try another) or can't-resolve-address.
430 - When we hup a dirserver and we've *removed* a server from the
431 approved-routers list, now we remove that server from the
432 in-memory directories too.
433 - Add bandwidthburst to server descriptor.
434 - Directories now say which dirserver signed them.
435 - Use a tor_assert macro that logs failed assertions too.
436 - Since we don't support truncateds much, don't bother sending them;
438 - Fetch randomness from /dev/urandom better (not via fopen/fread)
439 - Better debugging for tls errors
440 - Set Content-Type on the directory and hidserv descriptor.
441 - Remove IVs from cipher code, since AES-ctr has none.
443 - Fix an assert trigger for exit nodes that's been plaguing us since
444 the days of 0.0.2prexx (thanks weasel!)
445 - Fix a bug where we were closing tls connections intermittently.
446 It turns out openssl keeps its errors around -- so if an error
447 happens, and you don't ask about it, and then another openssl
448 operation happens and succeeds, and you ask if there was an error,
449 it tells you about the first error.
450 - Fix a bug that's been lurking since 27 may 03 (!)
451 When passing back a destroy cell, we would use the wrong circ id.
452 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
453 - Some versions of openssl have an SSL_pending function that erroneously
454 returns bytes when there is a non-application record pending.
455 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
456 o We were using an array of length zero in a few places.
457 o Win32's gethostbyname can't resolve an IP to an IP.
458 o Win32's close can't close a socket.
459 o Handle windows socket errors correctly.
461 - check for <sys/limits.h> so we build on FreeBSD again, and
462 <machine/limits.h> for NetBSD.
465 Changes in version 0.0.5 - 2004-03-30
466 o Install torrc as torrc.sample -- we no longer clobber your
468 o Fix mangled-state bug in directory fetching (was causing sigpipes).
469 o Only build circuits after we've fetched the directory: clients were
470 using only the directory servers before they'd fetched a directory.
471 This also means longer startup time; so it goes.
472 o Fix an assert trigger where an OP would fail to handshake, and we'd
473 expect it to have a nickname.
474 o Work around a tsocks bug: do a socks reject when AP connection dies
475 early, else tsocks goes into an infinite loop.
476 o Hold socks connection open until reply is flushed (if possible)
477 o Make exit nodes resolve IPs to IPs immediately, rather than asking
478 the dns farm to do it.
479 o Fix c99 aliasing warnings in rephist.c
480 o Don't include server descriptors that are older than 24 hours in the
482 o Give socks 'reject' replies their whole 15s to attempt to flush,
483 rather than seeing the 60s timeout and assuming the flush had failed.
484 o Clean automake droppings from the cvs repository
485 o Add in a 'notice' log level for things the operator should hear
486 but that aren't warnings
489 Changes in version 0.0.4 - 2004-03-26
490 o When connecting to a dirserver or OR and the network is down,
494 Changes in version 0.0.3 - 2004-03-26
495 o Warn and fail if server chose a nickname with illegal characters
496 o Port to Solaris and Sparc:
497 - include missing header fcntl.h
498 - have autoconf find -lsocket -lnsl automatically
499 - deal with hardware word alignment
500 - make uname() work (solaris has a different return convention)
501 - switch from using signal() to sigaction()
502 o Preliminary work on reputation system:
503 - Keep statistics on success/fail of connect attempts; they're published
504 by kill -USR1 currently.
505 - Add a RunTesting option to try to learn link state by creating test
506 circuits, even when SocksPort is off.
507 - Remove unused open circuits when there are too many.
510 Changes in version 0.0.2 - 2004-03-19
511 - Include strlcpy and strlcat for safer string ops
512 - define INADDR_NONE so we compile (but still not run) on solaris
515 Changes in version 0.0.2pre27 - 2004-03-14
517 - Allow internal tor networks (we were rejecting internal IPs,
518 now we allow them if they're set explicitly).
519 - And fix a few endian issues.
522 Changes in version 0.0.2pre26 - 2004-03-14
524 - If a stream times out after 15s without a connected cell, don't
525 try that circuit again: try a new one.
526 - Retry streams at most 4 times. Then give up.
527 - When a dirserver gets a descriptor from an unknown router, it
528 logs its fingerprint (so the dirserver operator can choose to
529 accept it even without mail from the server operator).
530 - Inform unapproved servers when we reject their descriptors.
531 - Make tor build on Windows again. It works as a client, who knows
533 - Clearer instructions in the torrc for how to set up a server.
534 - Be more efficient about reading fd's when our global token bucket
535 (used for rate limiting) becomes empty.
537 - Stop asserting that computers always go forward in time. It's
539 - When we sent a cell (e.g. destroy) and then marked an OR connection
540 expired, we might close it before finishing a flush if the other
541 side isn't reading right then.
542 - Don't allow dirservers to start if they haven't defined
544 - We were caching transient dns failures. Oops.
545 - Prevent servers from publishing an internal IP as their address.
546 - Address a strcat vulnerability in circuit.c
549 Changes in version 0.0.2pre25 - 2004-03-04
551 - Put the OR's IP in its router descriptor, not its fqdn. That way
552 we'll stop being stalled by gethostbyname for nodes with flaky dns,
555 - If the user typed in an address that didn't resolve, the server
559 Changes in version 0.0.2pre24 - 2004-03-03
561 - Fix an assertion failure in dns.c, where we were trying to dequeue
562 a pending dns resolve even if it wasn't pending
563 - Fix a spurious socks5 warning about still trying to write after the
564 connection is finished.
565 - Hold certain marked_for_close connections open until they're finished
566 flushing, rather than losing bytes by closing them too early.
567 - Correctly report the reason for ending a stream
568 - Remove some duplicate calls to connection_mark_for_close
569 - Put switch_id and start_daemon earlier in the boot sequence, so it
570 will actually try to chdir() to options.DataDirectory
571 - Make 'make test' exit(1) if a test fails; fix some unit tests
572 - Make tor fail when you use a config option it doesn't know about,
573 rather than warn and continue.
574 - Make --version work
575 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
578 Changes in version 0.0.2pre23 - 2004-02-29
580 - Print a statement when the first circ is finished, so the user
582 - If a relay cell is unrecognized at the end of the circuit,
583 send back a destroy. (So attacks to mutate cells are more
585 - New config option 'excludenodes' to avoid certain nodes for circuits.
586 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
587 so you can collect coredumps there.
589 - Fix a bug in tls flushing where sometimes data got wedged and
590 didn't flush until more data got sent. Hopefully this bug was
591 a big factor in the random delays we were seeing.
592 - Make 'connected' cells include the resolved IP, so the client
593 dns cache actually gets populated.
594 - Disallow changing from ORPort=0 to ORPort>0 on hup.
595 - When we time-out on a stream and detach from the circuit, send an
596 end cell down it first.
597 - Only warn about an unknown router (in exitnodes, entrynodes,
598 excludenodes) after we've fetched a directory.
601 Changes in version 0.0.2pre22 - 2004-02-26
603 - Servers publish less revealing uname information in descriptors.
604 - More memory tracking and assertions, to crash more usefully when
606 - If the default torrc isn't there, just use some default defaults.
607 Plus provide an internal dirservers file if they don't have one.
608 - When the user tries to use Tor as an http proxy, give them an http
609 501 failure explaining that we're a socks proxy.
610 - Dump a new router.desc on hup, to help confused people who change
611 their exit policies and then wonder why router.desc doesn't reflect
613 - Clean up the generic tor.sh init script that we ship with.
615 - If the exit stream is pending on the resolve, and a destroy arrives,
616 then the stream wasn't getting removed from the pending list. I
617 think this was the one causing recent server crashes.
618 - Use a more robust poll on OSX 10.3, since their poll is flaky.
619 - When it couldn't resolve any dirservers, it was useless from then on.
620 Now it reloads the RouterFile (or default dirservers) if it has no
622 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
623 many users don't even *have* a /usr/local/sbin/.
626 Changes in version 0.0.2pre21 - 2004-02-18
628 - There's a ChangeLog file that actually reflects the changelog.
629 - There's a 'torify' wrapper script, with an accompanying
630 tor-tsocks.conf, that simplifies the process of using tsocks for
631 tor. It even has a man page.
632 - The tor binary gets installed to sbin rather than bin now.
633 - Retry streams where the connected cell hasn't arrived in 15 seconds
634 - Clean up exit policy handling -- get the default out of the torrc,
635 so we can update it without forcing each server operator to fix
637 - Allow imaps and pop3s in default exit policy
639 - Prevent picking middleman nodes as the last node in the circuit
642 Changes in version 0.0.2pre20 - 2004-01-30
644 - We now have a deb package, and it's in debian unstable. Go to
646 - I've split the TotalBandwidth option into BandwidthRate (how many
647 bytes per second you want to allow, long-term) and
648 BandwidthBurst (how many bytes you will allow at once before the cap
649 kicks in). This better token bucket approach lets you, say, set
650 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
651 performance while not exceeding your monthly bandwidth quota.
652 - Push out a tls record's worth of data once you've got it, rather
653 than waiting until you've read everything waiting to be read. This
654 may improve performance by pipelining better. We'll see.
655 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
656 from failed circuits (if they haven't been connected yet) and attach
658 - Expire old streams that haven't managed to connect. Some day we'll
659 have them reattach to new circuits instead.
662 - Fix several memory leaks that were causing servers to become bloated
664 - Fix a few very rare assert triggers. A few more remain.
665 - Setuid to User _before_ complaining about running as root.
668 Changes in version 0.0.2pre19 - 2004-01-07
670 - Fix deadlock condition in dns farm. We were telling a child to die by
671 closing the parent's file descriptor to him. But newer children were
672 inheriting the open file descriptor from the parent, and since they
673 weren't closing it, the socket never closed, so the child never read
674 eof, so he never knew to exit. Similarly, dns workers were holding
675 open other sockets, leading to all sorts of chaos.
676 - New cleaner daemon() code for forking and backgrounding.
677 - If you log to a file, it now prints an entry at the top of the
678 logfile so you know it's working.
679 - The onionskin challenge length was 30 bytes longer than necessary.
680 - Started to patch up the spec so it's not quite so out of date.
683 Changes in version 0.0.2pre18 - 2004-01-02
685 - Fix endian issues with the 'integrity' field in the relay header.
686 - Fix a potential bug where connections in state
687 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
690 Changes in version 0.0.2pre17 - 2003-12-30
692 - Made --debuglogfile (or any second log file, actually) work.
693 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
694 adversary could force us into an infinite loop.
697 - Each onionskin handshake now includes a hash of the computed key,
698 to prove the server's identity and help perfect forward secrecy.
699 - Changed cell size from 256 to 512 bytes (working toward compatibility
701 - Changed cell length to 2 bytes, and moved it to the relay header.
702 - Implemented end-to-end integrity checking for the payloads of
704 - Separated streamid from 'recognized' (otherwise circuits will get
705 messed up when we try to have streams exit from the middle). We
706 use the integrity-checking to confirm that a cell is addressed to
708 - Randomize the initial circid and streamid values, so an adversary who
709 breaks into a node can't learn how many circuits or streams have
713 Changes in version 0.0.2pre16 - 2003-12-14
715 - Fixed a bug that made HUP trigger an assert
716 - Fixed a bug where a circuit that immediately failed wasn't being
717 counted as a failed circuit in counting retries.
720 - Now we close the circuit when we get a truncated cell: otherwise we're
721 open to an anonymity attack where a bad node in the path truncates
722 the circuit and then we open streams at him.
723 - Add port ranges to exit policies
724 - Add a conservative default exit policy
725 - Warn if you're running tor as root
726 - on HUP, retry OR connections and close/rebind listeners
727 - options.EntryNodes: try these nodes first when picking the first node
728 - options.ExitNodes: if your best choices happen to include any of
729 your preferred exit nodes, you choose among just those preferred
731 - options.ExcludedNodes: nodes that are never picked in path building
734 Changes in version 0.0.2pre15 - 2003-12-03
735 o Robustness and bugfixes:
736 - Sometimes clients would cache incorrect DNS resolves, which would
737 really screw things up.
738 - An OP that goes offline would slowly leak all its sockets and stop
740 - A wide variety of bugfixes in exit node selection, exit policy
741 handling, and processing pending streams when a new circuit is
743 - Pick nodes for a path only from those the directory says are up
744 - Choose randomly from all running dirservers, not always the first one
745 - Increase allowed http header size for directory fetch.
746 - Stop writing to stderr (if we're daemonized it will be closed).
747 - Enable -g always, so cores will be more useful to me.
748 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
751 - Wrote a man page. It lists commonly used options.
754 - Change default loglevel to warn.
755 - Make PidFile default to null rather than littering in your CWD.
756 - OnionRouter config option is now obsolete. Instead it just checks
758 - Moved to a single unified torrc file for both clients and servers.
761 Changes in version 0.0.2pre14 - 2003-11-29
762 o Robustness and bugfixes:
763 - Force the admin to make the DataDirectory himself
764 - to get ownership/permissions right
765 - so clients no longer make a DataDirectory and then never use it
766 - fix bug where a client who was offline for 45 minutes would never
767 pull down a directory again
768 - fix (or at least hide really well) the dns assert bug that was
769 causing server crashes
770 - warnings and improved robustness wrt clockskew for certs
771 - use the native daemon(3) to daemonize, when available
772 - exit if bind() fails
773 - exit if neither socksport nor orport is defined
774 - include our own tor_timegm (Win32 doesn't have its own)
775 - bugfix for win32 with lots of connections
776 - fix minor bias in PRNG
777 - make dirserver more robust to corrupt cached directory
780 - Wrote the design document (woo)
782 o Circuit building and exit policies:
783 - Circuits no longer try to use nodes that the directory has told them
785 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
786 bitcounts (18.0.0.0/8).
787 - Make AP connections standby for a circuit if no suitable circuit
788 exists, rather than failing
789 - Circuits choose exit node based on addr/port, exit policies, and
790 which AP connections are standing by
791 - Bump min pathlen from 2 to 3
792 - Relay end cells have a payload to describe why the stream ended.
793 - If the stream failed because of exit policy, try again with a new
795 - Clients have a dns cache to remember resolved addresses.
796 - Notice more quickly when we have no working circuits
799 - APPort is now called SocksPort
800 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
802 - RecommendedVersions is now a config variable rather than
803 hardcoded (for dirservers)
804 - Reloads config on HUP
805 - Usage info on -h or --help
806 - If you set User and Group config vars, it'll setu/gid to them.
808 Changes in version 0.0.2pre13 - 2003-10-19
810 - SSL_write no longer fails when it returns WANTWRITE and the number
811 of bytes in the buf has changed by the next SSL_write call.
812 - Fix segfault fetching directory when network is down
813 - Fix a variety of minor memory leaks
814 - Dirservers reload the fingerprints file on HUP, so I don't have
815 to take down the network when I approve a new router
816 - Default server config file has explicit Address line to specify fqdn
819 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
820 - Make listener connections not ever alloc bufs
822 o Autoconf improvements:
823 - don't clobber an external CFLAGS in ./configure
824 - Make install now works
825 - create var/lib/tor on make install
826 - autocreate a tor.sh initscript to help distribs
827 - autocreate the torrc and sample-server-torrc with correct paths
829 o Log files and Daemonizing now work:
830 - If --DebugLogFile is specified, log to it at -l debug
831 - If --LogFile is specified, use it instead of commandline
832 - If --RunAsDaemon is set, tor forks and backgrounds on startup