1 Changes in version 0.1.2.2-alpha - 2006-10-??
3 - Add server-side support for "reverse" DNS lookups (using PTR
4 records so clients can determine the canonical hostname for a
5 given IPv4 address). This has been specified for a long time,
6 but was previously never implemented. This is only supported by
7 eventdns; servers now announce in their descriptors whether they
9 - Specify and implement client-side SOCKS5 interface for reverse DNS
10 lookups; see doc/socks-extensions.txt for full information.
11 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
12 connect to directory servers through Tor. Previously, clients could
13 only connect to director servers over Tor from exit nodes, but couldn't
14 get directory information anonymously from a non-exit cache without
15 getting a directory server involved.
18 - Check for name servers (like Earthlink's) that hijack failing DNS
19 requests and replace the no-such-server answer with a "helpful"
20 redirect to an advertising-driven search portal. We're a little
21 clever about this, in order to work around DNS hijackers who
22 "helpfully" decline to hijack known-invalid RFC2606 addresses.
23 Config option "ServerDNSDetectHijacking 0" lets you turn it off.
24 - When asked to resolve a hostname, don't use non-exit servers unless
25 requested to do so. This allows servers with broken DNS to
26 be useful to the network.
27 - Add an "EnforceDistinctSubnets" option to control our "exclude
28 servers on the same /16" behavior. It's still on by default; this
29 is mostly for people who want to operate private test networks with
30 all the machines on the same subnet.
31 - If one of our entry guards is on the ExcludeNodes list, or the
32 directory authorities don't think it's a good guard, treat it as if it
33 were unlisted: stop using it as a guard, and throw it off the guards
34 list if it stays that way for a long time.
35 - Allow directory authorities to be marked separately as authorities for
36 the v1 directory protocol, the v2 directory protocol, and as hidden
37 service directories. This should make it easier to migrate trust away
38 from one of the two authorities currently running on Moria.
39 - Reserve the nickname "Unnamed" for routers that can't pick a hostname;
40 any router can call itself Unnamed; directory servers will never
41 allocate Unnamed to any particular router; clients won't believe that
42 any router is the canonical Unnamed.
43 - New controller event to alert the controller when our server descriptor
45 - Only include function names in log messages for debugging messages;
46 in other cases, the content of the message should be clear on its own,
47 and including the function name only seems to confuse users.
48 - Fix CIRC controller events so that controllers can learn the identity
49 digests of non-Named servers used in circuit paths. (Fixes bug 336.)
51 o Security Fixes, minor:
52 - If a client asked for a server by name, and we didn't have a
53 descriptor for a named server with that name, we might return an
55 - Fix NetBSD bug that could allow someone to force uninitialized RAM
56 to be sent to a server's DNS resolver. This only affects NetBSD
57 and other platforms that do not bounds-check tolower().
60 - Avoiding crashing on race condition in dns.c:
61 tor_assert(! resolve->expire)
62 - When a client asks the server to resolve (not connect to)
63 an address, and it has a cached answer, give them the cached answer.
64 Previously, the server would give them no answer at all.
67 - Two small performance improvements on parsing descriptors.
68 - Fix big bug affecting performance for both serving and reaching
70 - Major performance improvement on inserting descriptors: change
71 algorithm from O(n^2) to O(n).
72 - Make the common memory allocation path faster on machines where
73 malloc(0) returns a pointer.
74 - Fix a debug log message in eventdns to say "X resolved to Y"
75 instead of "X resolved to X".
76 - Prevent the contrib/exitlist script from printing the same
77 result more than once.
78 - Resume building on non-gcc compilers and ancient gcc. Resume
79 building with the -O0 compile flag. Resume building cleanly on
81 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
82 - Improve Tor's chances of building and running on Cygwin again.
83 - If we're a directory mirror and we ask for "all" network status
84 documents, we would discard status documents from authorities
86 - Avoid a memory corruption bug when creating a hash table for the first
88 - Track unreachable entry guards correctly: don't conflate 'unreachable
89 by us right now' with 'listed as down by the directory authorities'.
90 With the old code, if a guard was unreachable by us but listed as
91 running, it would clog our guard list forever.
92 - Make eventdns give strings for DNS errors, not just error numbers.
95 - Documented (and renamed) ServerDNSSearchDomains and
96 ServerDNSResolvConfFile options.
100 - Patches so Tor builds with MinGW on Windows.
101 - The Debian package now uses --verify-config when (re)starting,
102 to distinguish configuration errors from other errors.
103 - Update rpms to require libevent 1.1b.
104 - Remove architecture from OS X builds. The official builds are
105 now universal binaries.
107 - Make eventdns on-by-default.
108 - Divide eventdns log messages into warn and info messages.
109 - Add new config option "ResolvConf" to let the server operator
110 choose an alternate resolve.conf file.
112 - Allow really slow clients to not hang up five minutes into their
113 directory downloads (suggested by Adam J. Richter).
114 - Apply patch from Adam Langley: fix assert() in eventdns.c.
115 - Finally fix the openssl warnings with newer gccs that believe that
116 ignoring a return value is okay, but casting a return value and
117 then ignoring it is a sign of madness.
118 - Don't crash when the controller receives a third argument to an
119 "extendcircuit" request.
120 - Add a "getinfo address" controller command.
121 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
122 response; fix error code when "getinfo dir/status/" fails.
123 - Start remembering X-Your-Address-Is directory hints even if you're
124 a client, so you can become a server more smoothly.
125 - Avoid crash when telling controller stream-status and a stream
127 - Avoid crashing when we mmap a router cache file of size 0.
128 - Avoid duplicate entries on MyFamily line in server descriptor.
129 - Patch from Steve Hildrey: Generate network status correctly on
130 non-versioning dirservers.
131 - Send out a burst of long-range drop cells after we've established
132 that we're reachable. Spread them over 4 circuits, so hopefully
133 a few will be fast. This exercises our bandwidth and bootstraps
135 - Remove 8888 as a long lived port, and add 6697 (ircs).
136 - If we fail to build a circuit to an intended enclave, and it's
137 not mandatory that we use that enclave, stop wanting it.
142 Changes in version 0.1.2.1-alpha - 2006-08-27
144 - Add "eventdns" async dns library from Adam Langley, tweaked to
145 build on OSX and Windows. Only enabled if you pass the
146 --enable-eventdns argument to configure.
147 - Allow servers with no hostname or IP address to learn their
148 IP address by asking the directory authorities. This code only
149 kicks in when you would normally have exited with a "no address"
150 error. Nothing's authenticated, so use with care.
151 - Rather than waiting a fixed amount of time between retrying
152 application connections, we wait only 5 seconds for the first,
153 10 seconds for the second, and 15 seconds for each retry after
154 that. Hopefully this will improve the expected user experience.
155 - Patch from Tup to add support for transparent AP connections:
156 this basically bundles the functionality of trans-proxy-tor
157 into the Tor mainline. Now hosts with compliant pf/netfilter
158 implementations can redirect TCP connections straight to Tor
159 without diverting through SOCKS. Needs docs.
160 - Busy directory servers save lots of memory by spooling server
161 descriptors, v1 directories, and v2 networkstatus docs to buffers
162 as needed rather than en masse. Also mmap the cached-routers
163 files, so we don't need to keep the whole thing in memory too.
164 - Automatically avoid picking more than one node from the same
165 /16 network when constructing a circuit.
166 - Revise and clean up the torrc.sample that we ship with; add
167 a section for BandwidthRate and BandwidthBurst.
170 - Split circuit_t into origin_circuit_t and or_circuit_t, and
171 split connection_t into edge, or, dir, control, and base structs.
172 These will save quite a bit of memory on busy servers, and they'll
173 also help us track down bugs in the code and bugs in the spec.
174 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
175 or later. Log when we are doing this, so we can diagnose it when
176 it fails. (Also, recommend libevent 1.1b for kqueue and
177 win32 methods; deprecate libevent 1.0b harder; make libevent
178 recommendation system saner.)
179 - Start being able to build universal binaries on OS X (thanks
181 - Export the default exit policy via the control port, so controllers
182 don't need to guess what it is / will be later.
183 - Add a man page entry for ProtocolWarnings.
184 - Add TestVia config option to the man page.
185 - Remove even more protocol-related warnings from Tor server logs,
186 such as bad TLS handshakes and malformed begin cells.
187 - Stop fetching descriptors if you're not a dir mirror and you
188 haven't tried to establish any circuits lately. [This currently
189 causes some dangerous behavior, because when you start up again
190 you'll use your ancient server descriptors.]
191 - New DirPort behavior: if you have your dirport set, you download
192 descriptors aggressively like a directory mirror, whether or not
194 - Get rid of the router_retry_connections notion. Now routers
195 no longer try to rebuild long-term connections to directory
196 authorities, and directory authorities no longer try to rebuild
197 long-term connections to all servers. We still don't hang up
198 connections in these two cases though -- we need to look at it
199 more carefully to avoid flapping, and we likely need to wait til
201 - Drop compatibility with obsolete Tors that permit create cells
202 to have the wrong circ_id_type.
203 - Re-enable per-connection rate limiting. Get rid of the "OP
204 bandwidth" concept. Lay groundwork for "bandwidth classes" --
205 separate global buckets that apply depending on what sort of conn
207 - Start publishing one minute or so after we find our ORPort
208 to be reachable. This will help reduce the number of descriptors
209 we have for ourselves floating around, since it's quite likely
210 other things (e.g. DirPort) will change during that minute too.
211 - Fork the v1 directory protocol into its own spec document,
212 and mark dir-spec.txt as the currently correct (v2) spec.
215 - When we find our DirPort to be reachable, publish a new descriptor
216 so we'll tell the world (reported by pnx).
217 - Publish a new descriptor after we hup/reload. This is important
218 if our config has changed such that we'll want to start advertising
219 our DirPort now, etc.
220 - Allow Tor to start when RunAsDaemon is set but no logs are set.
221 - When we have a state file we cannot parse, tell the user and
222 move it aside. Now we avoid situations where the user starts
223 Tor in 1904, Tor writes a state file with that timestamp in it,
224 the user fixes her clock, and Tor refuses to start.
225 - Fix configure.in to not produce broken configure files with
226 more recent versions of autoconf. Thanks to Clint for his auto*
228 - "tor --verify-config" now exits with -1(255) or 0 depending on
229 whether the config options are bad or good.
230 - Resolve bug 321 when using dnsworkers: append a period to every
231 address we resolve at the exit node, so that we do not accidentally
232 pick up local addresses, and so that failing searches are retried
233 in the resolver search domains. (This is already solved for
234 eventdns.) (This breaks Blossom servers for now.)
235 - If we are using an exit enclave and we can't connect, e.g. because
236 its webserver is misconfigured to not listen on localhost, then
237 back off and try connecting from somewhere else before we fail.
240 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
241 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
242 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
243 when the IP address is mapped through MapAddress to a hostname.
244 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
245 useless IPv6 DNS resolves.
246 - Patch suggested by Karsten Loesing: respond to SIGNAL command
247 before we execute the signal, in case the signal shuts us down.
248 - Clean up AllowInvalidNodes man page entry.
249 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
250 - Add more asserts to track down an assert error on a windows Tor
251 server with connection_add being called with socket == -1.
252 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
253 - Fix misleading log messages: an entry guard that is "unlisted",
254 as well as not known to be "down" (because we've never heard
255 of it), is not therefore "up".
256 - Remove code to special-case "-cvs" ending, since it has not
257 actually mattered since 0.0.9.
258 - Make our socks5 handling more robust to broken socks clients:
259 throw out everything waiting on the buffer in between socks
260 handshake phases, since they can't possibly (so the theory
261 goes) have predicted what we plan to respond to them.
264 Changes in version 0.1.1.23 - 2006-07-30
266 - Fast Tor servers, especially exit nodes, were triggering asserts
267 due to a bug in handling the list of pending DNS resolves. Some
268 bugs still remain here; we're hunting them.
269 - Entry guards could crash clients by sending unexpected input.
270 - More fixes on reachability testing: if you find yourself reachable,
271 then don't ever make any client requests (so you stop predicting
272 circuits), then hup or have your clock jump, then later your IP
273 changes, you won't think circuits are working, so you won't try to
274 test reachability, so you won't publish.
277 - Avoid a crash if the controller does a resetconf firewallports
278 and then a setconf fascistfirewall=1.
279 - Avoid an integer underflow when the dir authority decides whether
280 a router is stable: we might wrongly label it stable, and compute
281 a slightly wrong median stability, when a descriptor is published
283 - Fix a place where we might trigger an assert if we can't build our
284 own server descriptor yet.
287 Changes in version 0.1.1.22 - 2006-07-05
289 - Fix a big bug that was causing servers to not find themselves
290 reachable if they changed IP addresses. Since only 0.1.1.22+
291 servers can do reachability testing correctly, now we automatically
292 make sure to test via one of these.
293 - Fix to allow clients and mirrors to learn directory info from
294 descriptor downloads that get cut off partway through.
295 - Directory authorities had a bug in deciding if a newly published
296 descriptor was novel enough to make everybody want a copy -- a few
297 servers seem to be publishing new descriptors many times a minute.
299 - Fix a rare bug that was causing some servers to complain about
300 "closing wedged cpuworkers" and skip some circuit create requests.
301 - Make the Exit flag in directory status documents actually work.
304 Changes in version 0.1.1.21 - 2006-06-10
305 o Crash and assert fixes from 0.1.1.20:
306 - Fix a rare crash on Tor servers that have enabled hibernation.
307 - Fix a seg fault on startup for Tor networks that use only one
309 - Fix an assert from a race condition that occurs on Tor servers
310 while exiting, where various threads are trying to log that they're
311 exiting, and delete the logs, at the same time.
312 - Make our unit tests pass again on certain obscure platforms.
315 - Add support for building SUSE RPM packages.
316 - Speed up initial bootstrapping for clients: if we are making our
317 first ever connection to any entry guard, then don't mark it down
319 - When only one Tor server in the network is labelled as a guard,
320 and we've already picked him, we would cycle endlessly picking him
321 again, being unhappy about it, etc. Now we specifically exclude
322 current guards when picking a new guard.
323 - Servers send create cells more reliably after the TLS connection
324 is established: we were sometimes forgetting to send half of them
325 when we had more than one pending.
326 - If we get a create cell that asks us to extend somewhere, but the
327 Tor server there doesn't match the expected digest, we now send
328 a destroy cell back, rather than silently doing nothing.
329 - Make options->RedirectExit work again.
330 - Make cookie authentication for the controller work again.
331 - Stop being picky about unusual characters in the arguments to
332 mapaddress. It's none of our business.
333 - Add a new config option "TestVia" that lets you specify preferred
334 middle hops to use for test circuits. Perhaps this will let me
335 debug the reachability problems better.
337 o Log / documentation fixes:
338 - If we're a server and some peer has a broken TLS certificate, don't
339 log about it unless ProtocolWarnings is set, i.e., we want to hear
340 about protocol violations by others.
341 - Fix spelling of VirtualAddrNetwork in man page.
342 - Add a better explanation at the top of the autogenerated torrc file
343 about what happened to our old torrc.
346 Changes in version 0.1.1.20 - 2006-05-23
347 o Crash and assert fixes from 0.1.0.17:
348 - Fix assert bug in close_logs() on exit: when we close and delete
349 logs, remove them all from the global "logfiles" list.
350 - Fix an assert error when we're out of space in the connection_list
351 and we try to post a hidden service descriptor (reported by Peter
353 - Fix a rare assert error when we've tried all intro points for
354 a hidden service and we try fetching the service descriptor again:
355 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed".
356 - Setconf SocksListenAddress kills Tor if it fails to bind. Now back
357 out and refuse the setconf if it would fail.
358 - If you specify a relative torrc path and you set RunAsDaemon in
359 your torrc, then it chdir()'s to the new directory. If you then
360 HUP, it tries to load the new torrc location, fails, and exits.
361 The fix: no longer allow a relative path to torrc when using -f.
362 - Check for integer overflows in more places, when adding elements
363 to smartlists. This could possibly prevent a buffer overflow
364 on malicious huge inputs.
366 o Security fixes, major:
367 - When we're printing strings from the network, don't try to print
368 non-printable characters. Now we're safer against shell escape
369 sequence exploits, and also against attacks to fool users into
370 misreading their logs.
371 - Implement entry guards: automatically choose a handful of entry
372 nodes and stick with them for all circuits. Only pick new guards
373 when the ones you have are unsuitable, and if the old guards
374 become suitable again, switch back. This will increase security
375 dramatically against certain end-point attacks. The EntryNodes
376 config option now provides some hints about which entry guards you
377 want to use most; and StrictEntryNodes means to only use those.
379 - Implement exit enclaves: if we know an IP address for the
380 destination, and there's a running Tor server at that address
381 which allows exit to the destination, then extend the circuit to
382 that exit first. This provides end-to-end encryption and end-to-end
383 authentication. Also, if the user wants a .exit address or enclave,
384 use 4 hops rather than 3, and cannibalize a general circ for it
386 - Obey our firewall options more faithfully:
387 . If we can't get to a dirserver directly, try going via Tor.
388 . Don't ever try to connect (as a client) to a place our
389 firewall options forbid.
390 . If we specify a proxy and also firewall options, obey the
391 firewall options even when we're using the proxy: some proxies
392 can only proxy to certain destinations.
393 - Make clients regenerate their keys when their IP address changes.
394 - For the OS X package's modified privoxy config file, comment
395 out the "logfile" line so we don't log everything passed
397 - Our TLS handshakes were generating a single public/private
398 keypair for the TLS context, rather than making a new one for
399 each new connection. Oops. (But we were still rotating them
400 periodically, so it's not so bad.)
401 - When we were cannibalizing a circuit with a particular exit
402 node in mind, we weren't checking to see if that exit node was
403 already present earlier in the circuit. Now we are.
404 - Require server descriptors to list IPv4 addresses -- hostnames
405 are no longer allowed. This also fixes potential vulnerabilities
406 to servers providing hostnames as their address and then
407 preferentially resolving them so they can partition users.
408 - Our logic to decide if the OR we connected to was the right guy
409 was brittle and maybe open to a mitm for invalid routers.
411 o Security fixes, minor:
412 - Adjust tor-spec.txt to parameterize cell and key lengths. Now
413 Ian Goldberg can prove things about our handshake protocol more
415 - Make directory authorities generate a separate "guard" flag to
416 mean "would make a good entry guard". Clients now honor the
417 is_guard flag rather than looking at is_fast or is_stable.
418 - Try to list MyFamily elements by key, not by nickname, and warn
419 if we've not heard of a server.
420 - Start using RAND_bytes rather than RAND_pseudo_bytes from
421 OpenSSL. Also, reseed our entropy every hour, not just at
422 startup. And add entropy in 512-bit chunks, not 160-bit chunks.
423 - Refuse server descriptors where the fingerprint line doesn't match
424 the included identity key. Tor doesn't care, but other apps (and
425 humans) might actually be trusting the fingerprint line.
426 - We used to kill the circuit when we receive a relay command we
427 don't recognize. Now we just drop that cell.
428 - Fix a bug found by Lasse Overlier: when we were making internal
429 circuits (intended to be cannibalized later for rendezvous and
430 introduction circuits), we were picking them so that they had
431 useful exit nodes. There was no need for this, and it actually
432 aids some statistical attacks.
433 - Start treating internal circuits and exit circuits separately.
434 It's important to keep them separate because internal circuits
435 have their last hops picked like middle hops, rather than like
436 exit hops. So exiting on them will break the user's expectations.
437 - Fix a possible way to DoS dirservers.
438 - When the client asked for a rendezvous port that the hidden
439 service didn't want to provide, we were sending an IP address
440 back along with the end cell. Fortunately, it was zero. But stop
443 o Packaging improvements:
444 - Implement --with-libevent-dir option to ./configure. Improve
445 search techniques to find libevent, and use those for openssl too.
446 - Fix a couple of bugs in OpenSSL detection. Deal better when
447 there are multiple SSLs installed with different versions.
448 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
449 - On non-gcc compilers (e.g. Solaris's cc), use "-g -O" instead of
451 - Make unit tests (and other invocations that aren't the real Tor)
452 run without launching listeners, creating subdirectories, and so on.
453 - The OS X installer was adding a symlink for tor_resolve but
454 the binary was called tor-resolve (reported by Thomas Hardly).
455 - Now we can target arch and OS in rpm builds (contributed by
456 Phobos). Also make the resulting dist-rpm filename match the
458 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
459 if you log to syslog and want something other than LOG_DAEMON.
460 - Fix the torify (tsocks) config file to not use Tor for localhost
462 - Start shipping socks-extensions.txt, tor-doc-unix.html,
463 tor-doc-server.html, and stylesheet.css in the tarball.
464 - Stop shipping tor-doc.html, INSTALL, and README in the tarball.
465 They are useless now.
466 - Add Peter Palfrader's contributed check-tor script. It lets you
467 easily check whether a given server (referenced by nickname)
469 - Add BSD-style contributed startup script "rc.subr" from Peter
472 o Directory improvements -- new directory protocol:
473 - See tor/doc/dir-spec.txt for all the juicy details. Key points:
474 - Authorities and caches publish individual descriptors (by
475 digest, by fingerprint, by "all", and by "tell me yours").
476 - Clients don't download or use the old directory anymore. Now they
477 download network-statuses from the directory authorities, and
478 fetch individual server descriptors as needed from mirrors.
479 - Clients don't download descriptors of non-running servers.
480 - Download descriptors by digest, not by fingerprint. Caches try to
481 download all listed digests from authorities; clients try to
482 download "best" digests from caches. This avoids partitioning
483 and isolating attacks better.
484 - Only upload a new server descriptor when options change, 18
485 hours have passed, uptime is reset, or bandwidth changes a lot.
486 - Directory authorities silently throw away new descriptors that
487 haven't changed much if the timestamps are similar. We do this to
488 tolerate older Tor servers that upload a new descriptor every 15
489 minutes. (It seemed like a good idea at the time.)
490 - Clients choose directory servers from the network status lists,
491 not from their internal list of router descriptors. Now they can
492 go to caches directly rather than needing to go to authorities
493 to bootstrap the first set of descriptors.
494 - When picking a random directory, prefer non-authorities if any
496 - Add a new flag to network-status indicating whether the server
497 can answer v2 directory requests too.
498 - Directory mirrors now cache up to 16 unrecognized network-status
499 docs, so new directory authorities will be cached too.
500 - Stop parsing, storing, or using running-routers output (but
501 mirrors still cache and serve it).
502 - Clients consider a threshold of "versioning" directory authorities
503 before deciding whether to warn the user that he's obsolete.
504 - Authorities publish separate sorted lists of recommended versions
505 for clients and for servers.
506 - Change DirServers config line to note which dirs are v1 authorities.
507 - Put nicknames on the DirServer line, so we can refer to them
508 without requiring all our users to memorize their IP addresses.
509 - Remove option when getting directory cache to see whether they
510 support running-routers; they all do now. Replace it with one
511 to see whether caches support v2 stuff.
512 - Stop listing down or invalid nodes in the v1 directory. This
513 reduces its bulk by about 1/3, and reduces load on mirrors.
514 - Mirrors no longer cache the v1 directory as often.
515 - If we as a directory mirror don't know of any v1 directory
516 authorities, then don't try to cache any v1 directories.
518 o Other directory improvements:
519 - Add lefkada.eecs.harvard.edu and tor.dizum.com as fourth and
520 fifth authoritative directory servers.
521 - Directory authorities no longer require an open connection from
522 a server to consider him "reachable". We need this change because
523 when we add new directory authorities, old servers won't know not
525 - Dir authorities now do their own external reachability testing
526 of each server, and only list as running the ones they found to
527 be reachable. We also send back warnings to the server's logs if
528 it uploads a descriptor that we already believe is unreachable.
529 - Spread the directory authorities' reachability testing over the
530 entire testing interval, so we don't try to do 500 TLS's at once
532 - Make the "stable" router flag in network-status be the median of
533 the uptimes of running valid servers, and make clients pay
534 attention to the network-status flags. Thus the cutoff adapts
535 to the stability of the network as a whole, making IRC, IM, etc
536 connections more reliable.
537 - Make the v2 dir's "Fast" flag based on relative capacity, just
538 like "Stable" is based on median uptime. Name everything in the
539 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
540 - Retry directory requests if we fail to get an answer we like
541 from a given dirserver (we were retrying before, but only if
543 - Return a robots.txt on our dirport to discourage google indexing.
545 o Controller protocol improvements:
546 - Revised controller protocol (version 1) that uses ascii rather
547 than binary: tor/doc/control-spec.txt. Add supporting libraries
548 in python and java and c# so you can use the controller from your
549 applications without caring how our protocol works.
550 - Allow the DEBUG controller event to work again. Mark certain log
551 entries as "don't tell this to controllers", so we avoid cycles.
552 - New controller function "getinfo accounting", to ask how
553 many bytes we've used in this time period.
554 - Add a "resetconf" command so you can set config options like
555 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
556 a config option in the torrc with no value, then it clears it
557 entirely (rather than setting it to its default).
558 - Add a "getinfo config-file" to tell us where torrc is. Also
559 expose guard nodes, config options/names.
560 - Add a "quit" command (when when using the controller manually).
561 - Add a new signal "newnym" to "change pseudonyms" -- that is, to
562 stop using any currently-dirty circuits for new streams, so we
563 don't link new actions to old actions. This also occurs on HUP
565 - If we would close a stream early (e.g. it asks for a .exit that
566 we know would refuse it) but the LeaveStreamsUnattached config
567 option is set by the controller, then don't close it.
568 - Add a new controller event type "authdir_newdescs" that allows
569 controllers to get all server descriptors that were uploaded to
570 a router in its role as directory authority.
571 - New controller option "getinfo desc/all-recent" to fetch the
572 latest server descriptor for every router that Tor knows about.
573 - Fix the controller's "attachstream 0" command to treat conn like
574 it just connected, doing address remapping, handling .exit and
575 .onion idioms, and so on. Now we're more uniform in making sure
576 that the controller hears about new and closing connections.
577 - Permit transitioning from ORPort==0 to ORPort!=0, and back, from
578 the controller. Also, rotate dns and cpu workers if the controller
579 changes options that will affect them; and initialize the dns
580 worker cache tree whether or not we start out as a server.
581 - Add a new circuit purpose 'controller' to let the controller ask
582 for a circuit that Tor won't try to use. Extend the "extendcircuit"
583 controller command to let you specify the purpose if you're starting
584 a new circuit. Add a new "setcircuitpurpose" controller command to
585 let you change a circuit's purpose after it's been created.
586 - Let the controller ask for "getinfo dir/server/foo" so it can ask
587 directly rather than connecting to the dir port. "getinfo
588 dir/status/foo" also works, but currently only if your DirPort
590 - Let the controller tell us about certain router descriptors
591 that it doesn't want Tor to use in circuits. Implement
592 "setrouterpurpose" and modify "+postdescriptor" to do this.
593 - If the controller's *setconf commands fail, collect an error
594 message in a string and hand it back to the controller -- don't
595 just tell them to go read their logs.
597 o Scalability, resource management, and performance:
598 - Fix a major load balance bug: we were round-robin reading in 16 KB
599 chunks, and servers with bandwidthrate of 20 KB, while downloading
600 a 600 KB directory, would starve their other connections. Now we
601 try to be a bit more fair.
602 - Be more conservative about whether to advertise our DirPort.
603 The main change is to not advertise if we're running at capacity
604 and either a) we could hibernate ever or b) our capacity is low
605 and we're using a default DirPort.
606 - We weren't cannibalizing circuits correctly for
607 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
608 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
609 build those from scratch. This should make hidden services faster.
610 - Predict required circuits better, with an eye toward making hidden
611 services faster on the service end.
612 - Compress exit policies even more: look for duplicate lines and
614 - Generate 18.0.0.0/8 address policy format in descs when we can;
615 warn when the mask is not reducible to a bit-prefix.
616 - There used to be two ways to specify your listening ports in a
617 server descriptor: on the "router" line and with a separate "ports"
618 line. Remove support for the "ports" line.
619 - Reduce memory requirements in our structs by changing the order
620 of fields. Replace balanced trees with hash tables. Inline
621 bottleneck smartlist functions. Add a "Map from digest to void*"
622 abstraction so we can do less hex encoding/decoding, and use it
623 in router_get_by_digest(). Many other CPU and memory improvements.
624 - Allow tor_gzip_uncompress to extract as much as possible from
625 truncated compressed data. Try to extract as many
626 descriptors as possible from truncated http responses (when
627 purpose is DIR_PURPOSE_FETCH_ROUTERDESC).
628 - Make circ->onionskin a pointer, not a static array. moria2 was using
629 125000 circuit_t's after it had been up for a few weeks, which
630 translates to 20+ megs of wasted space.
631 - The private half of our EDH handshake keys are now chosen out
632 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
633 - Stop doing the complex voodoo overkill checking for insecure
634 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
635 - Do round-robin writes for TLS of at most 16 kB per write. This
636 might be more fair on loaded Tor servers.
637 - Do not use unaligned memory access on alpha, mips, or mipsel.
638 It *works*, but is very slow, so we treat them as if it doesn't.
640 o Other bugfixes and improvements:
641 - Start storing useful information to $DATADIR/state, so we can
642 remember things across invocations of Tor. Retain unrecognized
643 lines so we can be forward-compatible, and write a TorVersion line
644 so we can be backward-compatible.
645 - If ORPort is set, Address is not explicitly set, and our hostname
646 resolves to a private IP address, try to use an interface address
647 if it has a public address. Now Windows machines that think of
648 themselves as localhost can guess their address.
649 - Regenerate our local descriptor if it's dirty and we try to use
650 it locally (e.g. if it changes during reachability detection).
651 This was causing some Tor servers to keep publishing the same
652 initial descriptor forever.
653 - Tor servers with dynamic IP addresses were needing to wait 18
654 hours before they could start doing reachability testing using
655 the new IP address and ports. This is because they were using
656 the internal descriptor to learn what to test, yet they were only
657 rebuilding the descriptor once they decided they were reachable.
658 - It turns out we couldn't bootstrap a network since we added
659 reachability detection in 0.1.0.1-rc. Good thing the Tor network
660 has never gone down. Add an AssumeReachable config option to let
661 servers and authorities bootstrap. When we're trying to build a
662 high-uptime or high-bandwidth circuit but there aren't enough
663 suitable servers, try being less picky rather than simply failing.
664 - Newly bootstrapped Tor networks couldn't establish hidden service
665 circuits until they had nodes with high uptime. Be more tolerant.
666 - Really busy servers were keeping enough circuits open on stable
667 connections that they were wrapping around the circuit_id
668 space. (It's only two bytes.) This exposed a bug where we would
669 feel free to reuse a circuit_id even if it still exists but has
670 been marked for close. Try to fix this bug. Some bug remains.
671 - When we fail to bind or listen on an incoming or outgoing
672 socket, we now close it before refusing, rather than just
673 leaking it. (Thanks to Peter Palfrader for finding.)
674 - Fix a file descriptor leak in start_daemon().
675 - On Windows, you can't always reopen a port right after you've
676 closed it. So change retry_listeners() to only close and re-open
677 ports that have changed.
678 - Workaround a problem with some http proxies that refuse GET
679 requests that specify "Content-Length: 0". Reported by Adrian.
680 - Recover better from TCP connections to Tor servers that are
681 broken but don't tell you (it happens!); and rotate TLS
682 connections once a week.
683 - Fix a scary-looking but apparently harmless bug where circuits
684 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
685 servers, and never switch to state CIRCUIT_STATE_OPEN.
686 - Check for even more Windows version flags when writing the platform
687 string in server descriptors, and note any we don't recognize.
688 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
689 get a better idea of why their circuits failed. Not used yet.
690 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
691 We don't use them yet, but maybe one day our DNS resolver will be
692 able to discover them.
693 - Let people type "tor --install" as well as "tor -install" when they
694 want to make it an NT service.
695 - Looks like we were never delivering deflated (i.e. compressed)
696 running-routers lists, even when asked. Oops.
697 - We were leaking some memory every time the client changed IPs.
698 - Clean up more of the OpenSSL memory when exiting, so we can detect
700 - Never call free() on tor_malloc()d memory. This will help us
701 use dmalloc to detect memory leaks.
702 - Some Tor servers process billions of cells per day. These
703 statistics are now uint64_t's.
704 - Check [X-]Forwarded-For headers in HTTP requests when generating
705 log messages. This lets people run dirservers (and caches) behind
706 Apache but still know which IP addresses are causing warnings.
707 - Fix minor integer overflow in calculating when we expect to use up
708 our bandwidth allocation before hibernating.
709 - Lower the minimum required number of file descriptors to 1000,
710 so we can have some overhead for Valgrind on Linux, where the
711 default ulimit -n is 1024.
712 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
713 and its existence is confusing some users.
715 o Config option fixes:
716 - Add a new config option ExitPolicyRejectPrivate which defaults
717 to on. Now all exit policies will begin with rejecting private
718 addresses, unless the server operator explicitly turns it off.
719 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB.
720 - Add new ReachableORAddresses and ReachableDirAddresses options
721 that understand address policies. FascistFirewall is now a synonym
722 for "ReachableORAddresses *:443", "ReachableDirAddresses *:80".
723 - Start calling it FooListenAddress rather than FooBindAddress,
724 since few of our users know what it means to bind an address
726 - If the user gave Tor an odd number of command-line arguments,
727 we were silently ignoring the last one. Now we complain and fail.
728 This wins the oldest-bug prize -- this bug has been present since
729 November 2002, as released in Tor 0.0.0.
730 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
731 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
732 it would silently ignore the 6668.
733 - If we get a linelist or linelist_s config option from the torrc,
734 e.g. ExitPolicy, and it has no value, warn and skip rather than
735 silently resetting it to its default.
736 - Setconf was appending items to linelists, not clearing them.
737 - Add MyFamily to torrc.sample in the server section, so operators
738 will be more likely to learn that it exists.
739 - Make ContactInfo mandatory for authoritative directory servers.
740 - MaxConn has been obsolete for a while now. Document the ConnLimit
741 config option, which is a *minimum* number of file descriptors
742 that must be available else Tor refuses to start.
743 - Get rid of IgnoreVersion undocumented config option, and make us
744 only warn, never exit, when we're running an obsolete version.
745 - Make MonthlyAccountingStart config option truly obsolete now.
746 - Correct the man page entry on TrackHostExitsExpire.
747 - Let directory authorities start even if they don't specify an
748 Address config option.
749 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
750 reflect the updated flags in our v2 dir protocol.
752 o Config option features:
753 - Add a new config option FastFirstHopPK (on by default) so clients
754 do a trivial crypto handshake for their first hop, since TLS has
755 already taken care of confidentiality and authentication.
756 - Let the user set ControlListenAddress in the torrc. This can be
757 dangerous, but there are some cases (like a secured LAN) where it
759 - New config options to help controllers: FetchServerDescriptors
760 and FetchHidServDescriptors for whether to fetch server
761 info and hidserv info or let the controller do it, and
762 PublishServerDescriptor and PublishHidServDescriptors.
763 - Also let the controller set the __AllDirActionsPrivate config
764 option if you want all directory fetches/publishes to happen via
765 Tor (it assumes your controller bootstraps your circuits).
766 - Add "HardwareAccel" config option: support for crypto hardware
767 accelerators via OpenSSL. Off by default, until we find somebody
768 smart who can test it for us. (It appears to produce seg faults
769 in at least some cases.)
770 - New config option "AuthDirRejectUnlisted" for directory authorities
771 as a panic button: if we get flooded with unusable servers we can
772 revert to only listing servers in the approved-routers file.
773 - Directory authorities can now reject/invalidate by key and IP,
774 with the config options "AuthDirInvalid" and "AuthDirReject", or
775 by marking a fingerprint as "!reject" or "!invalid" (as its
776 nickname) in the approved-routers file. This is useful since
777 currently we automatically list servers as running and usable
778 even if we know they're jerks.
779 - Add a new config option TestSocks so people can see whether their
780 applications are using socks4, socks4a, socks5-with-ip, or
781 socks5-with-fqdn. This way they don't have to keep mucking
782 with tcpdump and wondering if something got cached somewhere.
783 - Add "private:*" as an alias in configuration for policies. Now
784 you can simplify your exit policy rather than needing to list
785 every single internal or nonroutable network space.
786 - Accept "private:*" in routerdesc exit policies; not generated yet
787 because older Tors do not understand it.
788 - Add configuration option "V1AuthoritativeDirectory 1" which
789 moria1, moria2, and tor26 have set.
790 - Implement an option, VirtualAddrMask, to set which addresses
791 get handed out in response to mapaddress requests. This works
792 around a bug in tsocks where 127.0.0.0/8 is never socksified.
793 - Add a new config option FetchUselessDescriptors, off by default,
794 for when you plan to run "exitlist" on your client and you want
795 to know about even the non-running descriptors.
796 - SocksTimeout: How long do we let a socks connection wait
797 unattached before we fail it?
798 - CircuitBuildTimeout: Cull non-open circuits that were born
799 at least this many seconds ago.
800 - CircuitIdleTimeout: Cull open clean circuits that were born
801 at least this many seconds ago.
802 - New config option SafeSocks to reject all application connections
803 using unsafe socks protocols. Defaults to off.
805 o Improved and clearer log messages:
806 - Reduce clutter in server logs. We're going to try to make
807 them actually usable now. New config option ProtocolWarnings that
808 lets you hear about how _other Tors_ are breaking the protocol. Off
810 - Divide log messages into logging domains. Once we put some sort
811 of interface on this, it will let people looking at more verbose
812 log levels specify the topics they want to hear more about.
813 - Log server fingerprint on startup, so new server operators don't
814 have to go hunting around their filesystem for it.
815 - Provide dire warnings to any users who set DirServer manually;
816 move it out of torrc.sample and into torrc.complete.
817 - Make the log message less scary when all the dirservers are
818 temporarily unreachable.
819 - When tor_socketpair() fails in Windows, give a reasonable
820 Windows-style errno back.
821 - Improve tor_gettimeofday() granularity on windows.
822 - We were printing the number of idle dns workers incorrectly when
824 - Handle duplicate lines in approved-routers files without warning.
825 - We were whining about using socks4 or socks5-with-local-lookup
826 even when it's an IP address in the "virtual" range we designed
827 exactly for this case.
828 - Check for named servers when looking them up by nickname;
829 warn when we're calling a non-named server by its nickname;
830 don't warn twice about the same name.
831 - Downgrade the dirserver log messages when whining about
833 - Correct "your server is reachable" log entries to indicate that
834 it was self-testing that told us so.
835 - If we're trying to be a Tor server and running Windows 95/98/ME
836 as a server, explain that we'll likely crash.
837 - Provide a more useful warn message when our onion queue gets full:
838 the CPU is too slow or the exit policy is too liberal.
839 - Don't warn when we receive a 503 from a dirserver/cache -- this
840 will pave the way for them being able to refuse if they're busy.
841 - When we fail to bind a listener, try to provide a more useful
842 log message: e.g., "Is Tor already running?"
843 - Only start testing reachability once we've established a
844 circuit. This will make startup on dir authorities less noisy.
845 - Don't try to upload hidden service descriptors until we have
846 established a circuit.
847 - Tor didn't warn when it failed to open a log file.
848 - Warn when listening on a public address for socks. We suspect a
849 lot of people are setting themselves up as open socks proxies,
850 and they have no idea that jerks on the Internet are using them,
851 since they simply proxy the traffic into the Tor network.
852 - Give a useful message when people run Tor as the wrong user,
853 rather than telling them to start chowning random directories.
854 - Fix a harmless bug that was causing Tor servers to log
855 "Got an end because of misc error, but we're not an AP. Closing."
856 - Fix wrong log message when you add a "HiddenServiceNodes" config
857 line without any HiddenServiceDir line (reported by Chris Thomas).
858 - Directory authorities now stop whining so loudly about bad
859 descriptors that they fetch from other dirservers. So when there's
860 a log complaint, it's for sure from a freshly uploaded descriptor.
861 - When logging via syslog, include the pid whenever we provide
862 a log entry. Suggested by Todd Fries.
863 - When we're shutting down and we do something like try to post a
864 server descriptor or rendezvous descriptor, don't complain that
865 we seem to be unreachable. Of course we are, we're shutting down.
866 - Change log line for unreachability to explicitly suggest /etc/hosts
867 as the culprit. Also make it clearer what IP address and ports we're
868 testing for reachability.
869 - Put quotes around user-supplied strings when logging so users are
870 more likely to realize if they add bad characters (like quotes)
872 - NT service patch from Matt Edman to improve error messages on Win32.
875 Changes in version 0.1.0.17 - 2006-02-17
876 o Crash bugfixes on 0.1.0.x:
877 - When servers with a non-zero DirPort came out of hibernation,
878 sometimes they would trigger an assert.
880 o Other important bugfixes:
881 - On platforms that don't have getrlimit (like Windows), we were
882 artificially constraining ourselves to a max of 1024
883 connections. Now just assume that we can handle as many as 15000
884 connections. Hopefully this won't cause other problems.
886 o Backported features:
887 - When we're a server, a client asks for an old-style directory,
888 and our write bucket is empty, don't give it to him. This way
889 small servers can continue to serve the directory *sometimes*,
890 without getting overloaded.
891 - Whenever you get a 503 in response to a directory fetch, try
892 once more. This will become important once servers start sending
893 503's whenever they feel busy.
894 - Fetch a new directory every 120 minutes, not every 40 minutes.
895 Now that we have hundreds of thousands of users running the old
896 directory algorithm, it's starting to hurt a lot.
897 - Bump up the period for forcing a hidden service descriptor upload
898 from 20 minutes to 1 hour.
901 Changes in version 0.1.0.16 - 2006-01-02
902 o Crash bugfixes on 0.1.0.x:
903 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
904 corrupting the heap, losing FDs, or crashing when we need to resize
905 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
906 - It turns out sparc64 platforms crash on unaligned memory access
907 too -- so detect and avoid this.
908 - Handle truncated compressed data correctly (by detecting it and
910 - Fix possible-but-unlikely free(NULL) in control.c.
911 - When we were closing connections, there was a rare case that
912 stomped on memory, triggering seg faults and asserts.
913 - Avoid potential infinite recursion when building a descriptor. (We
914 don't know that it ever happened, but better to fix it anyway.)
915 - We were neglecting to unlink marked circuits from soon-to-close OR
916 connections, which caused some rare scribbling on freed memory.
917 - Fix a memory stomping race bug when closing the joining point of two
919 - Fix an assert in time parsing found by Steven Murdoch.
921 o Other bugfixes on 0.1.0.x:
922 - When we're doing reachability testing, provide more useful log
923 messages so the operator knows what to expect.
924 - Do not check whether DirPort is reachable when we are suppressing
925 advertising it because of hibernation.
926 - When building with -static or on Solaris, we sometimes needed -ldl.
927 - One of the dirservers (tor26) changed its IP address.
928 - When we're deciding whether a stream has enough circuits around
929 that can handle it, count the freshly dirty ones and not the ones
930 that are so dirty they won't be able to handle it.
931 - When we're expiring old circuits, we had a logic error that caused
932 us to close new rendezvous circuits rather than old ones.
933 - Give a more helpful log message when you try to change ORPort via
934 the controller: you should upgrade Tor if you want that to work.
935 - We were failing to parse Tor versions that start with "Tor ".
936 - Tolerate faulty streams better: when a stream fails for reason
937 exitpolicy, stop assuming that the router is lying about his exit
938 policy. When a stream fails for reason misc, allow it to retry just
939 as if it was resolvefailed. When a stream has failed three times,
940 reset its failure count so we can try again and get all three tries.
943 Changes in version 0.1.0.15 - 2005-09-23
944 o Bugfixes on 0.1.0.x:
945 - Reject ports 465 and 587 (spam targets) in default exit policy.
946 - Don't crash when we don't have any spare file descriptors and we
947 try to spawn a dns or cpu worker.
948 - Get rid of IgnoreVersion undocumented config option, and make us
949 only warn, never exit, when we're running an obsolete version.
950 - Don't try to print a null string when your server finds itself to
951 be unreachable and the Address config option is empty.
952 - Make the numbers in read-history and write-history into uint64s,
953 so they don't overflow and publish negatives in the descriptor.
954 - Fix a minor memory leak in smartlist_string_remove().
955 - We were only allowing ourselves to upload a server descriptor at
956 most every 20 minutes, even if it changed earlier than that.
957 - Clean up log entries that pointed to old URLs.
960 Changes in version 0.1.0.14 - 2005-08-08
961 o Bugfixes on 0.1.0.x:
962 - Fix the other half of the bug with crypto handshakes
964 - Fix an assert trigger if you send a 'signal term' via the
965 controller when it's listening for 'event info' messages.
968 Changes in version 0.1.0.13 - 2005-08-04
969 o Bugfixes on 0.1.0.x:
970 - Fix a critical bug in the security of our crypto handshakes.
971 - Fix a size_t underflow in smartlist_join_strings2() that made
972 it do bad things when you hand it an empty smartlist.
973 - Fix Windows installer to ship Tor license (thanks to Aphex for
974 pointing out this oversight) and put a link to the doc directory
976 - Explicitly set no-unaligned-access for sparc: it turns out the
977 new gcc's let you compile broken code, but that doesn't make it
981 Changes in version 0.1.0.12 - 2005-07-18
982 o New directory servers:
983 - tor26 has changed IP address.
985 o Bugfixes on 0.1.0.x:
986 - Fix a possible double-free in tor_gzip_uncompress().
987 - When --disable-threads is set, do not search for or link against
989 - Don't trigger an assert if an authoritative directory server
990 claims its dirport is 0.
991 - Fix bug with removing Tor as an NT service: some people were
992 getting "The service did not return an error." Thanks to Matt
996 Changes in version 0.1.0.11 - 2005-06-30
997 o Bugfixes on 0.1.0.x:
998 - Fix major security bug: servers were disregarding their
999 exit policies if clients behaved unexpectedly.
1000 - Make OS X init script check for missing argument, so we don't
1001 confuse users who invoke it incorrectly.
1002 - Fix a seg fault in "tor --hash-password foo".
1003 - The MAPADDRESS control command was broken.
1006 Changes in version 0.1.0.10 - 2005-06-14
1008 - Make NT services work and start on startup on Win32 (based on
1009 patch by Matt Edman). See the FAQ entry for details.
1010 - Make 'platform' string in descriptor more accurate for Win32
1011 servers, so it's not just "unknown platform".
1012 - REUSEADDR on normal platforms means you can rebind to the port
1013 right after somebody else has let it go. But REUSEADDR on Win32
1014 means you can bind to the port _even when somebody else already
1015 has it bound_! So, don't do that on Win32.
1016 - Clean up the log messages when starting on Win32 with no config
1018 - Allow seeding the RNG on Win32 even when you're not running as
1019 Administrator. If seeding the RNG on Win32 fails, quit.
1021 o Assert / crash bugs:
1022 - Refuse relay cells that claim to have a length larger than the
1023 maximum allowed. This prevents a potential attack that could read
1024 arbitrary memory (e.g. keys) from an exit server's process
1026 - If unofficial Tor clients connect and send weird TLS certs, our
1027 Tor server triggers an assert. Stop asserting, and start handling
1028 TLS errors better in other situations too.
1029 - Fix a race condition that can trigger an assert when we have a
1030 pending create cell and an OR connection attempt fails.
1033 - Use pthreads for worker processes rather than forking. This was
1034 forced because when we forked, we ended up wasting a lot of
1035 duplicate ram over time.
1036 - Also switch to foo_r versions of some library calls to allow
1037 reentry and threadsafeness.
1038 - Implement --disable-threads configure option. Disable threads on
1039 netbsd and openbsd by default, because they have no reentrant
1040 resolver functions (!), and on solaris since it has other
1042 - Fix possible bug on threading platforms (e.g. win32) which was
1043 leaking a file descriptor whenever a cpuworker or dnsworker died.
1044 - Fix a minor memory leak when somebody establishes an introduction
1045 point at your Tor server.
1046 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1048 - Add ./configure --with-dmalloc option, to track memory leaks.
1049 - And try to free all memory on closing, so we can detect what
1052 o Protocol correctness:
1053 - When we've connected to an OR and handshaked but didn't like
1054 the result, we were closing the conn without sending destroy
1055 cells back for pending circuits. Now send those destroys.
1056 - Start sending 'truncated' cells back rather than destroy cells
1057 if the circuit closes in front of you. This means we won't have
1058 to abandon partially built circuits.
1059 - Handle changed router status correctly when dirserver reloads
1060 fingerprint file. We used to be dropping all unverified descriptors
1061 right then. The bug was hidden because we would immediately
1062 fetch a directory from another dirserver, which would include the
1063 descriptors we just dropped.
1064 - Revise tor-spec to add more/better stream end reasons.
1065 - Revise all calls to connection_edge_end to avoid sending 'misc',
1066 and to take errno into account where possible.
1067 - Client now retries when streams end early for 'hibernating' or
1068 'resource limit' reasons, rather than failing them.
1069 - Try to be more zealous about calling connection_edge_end when
1070 things go bad with edge conns in connection.c.
1072 o Robustness improvements:
1073 - Better handling for heterogeneous / unreliable nodes:
1074 - Annotate circuits with whether they aim to contain high uptime
1075 nodes and/or high capacity nodes. When building circuits, choose
1077 - This means that every single node in an intro rend circuit,
1078 not just the last one, will have a minimum uptime.
1079 - New config option LongLivedPorts to indicate application streams
1080 that will want high uptime circuits.
1081 - Servers reset uptime when a dir fetch entirely fails. This
1082 hopefully reflects stability of the server's network connectivity.
1083 - If somebody starts his tor server in Jan 2004 and then fixes his
1084 clock, don't make his published uptime be a year.
1085 - Reset published uptime when we wake up from hibernation.
1086 - Introduce a notion of 'internal' circs, which are chosen without
1087 regard to the exit policy of the last hop. Intro and rendezvous
1088 circs must be internal circs, to avoid leaking information. Resolve
1089 and connect streams can use internal circs if they want.
1090 - New circuit pooling algorithm: keep track of what destination ports
1091 we've used recently (start out assuming we'll want to use 80), and
1092 make sure to have enough circs around to satisfy these ports. Also
1093 make sure to have 2 internal circs around if we've required internal
1094 circs lately (and with high uptime if we've seen that lately too).
1095 - Turn addr_policy_compare from a tristate to a quadstate; this should
1096 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1097 for google.com" problem.
1098 - When a client asks us for a dir mirror and we don't have one,
1099 launch an attempt to get a fresh one.
1100 - First cut at support for "create-fast" cells. Clients can use
1101 these when extending to their first hop, since the TLS already
1102 provides forward secrecy and authentication. Not enabled on
1105 o Reachability testing.
1106 - Your Tor server will automatically try to see if its ORPort and
1107 DirPort are reachable from the outside, and it won't upload its
1108 descriptor until it decides at least ORPort is reachable (when
1109 DirPort is not yet found reachable, publish it as zero).
1110 - When building testing circs for ORPort testing, use only
1111 high-bandwidth nodes, so fewer circuits fail.
1112 - Notice when our IP changes, and reset stats/uptime/reachability.
1113 - Authdirservers don't do ORPort reachability detection, since
1114 they're in clique mode, so it will be rare to find a server not
1115 already connected to them.
1116 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1120 - Now we allow two unverified servers with the same nickname
1121 but different keys. But if a nickname is verified, only that
1122 nickname+key are allowed.
1123 - If you're an authdirserver connecting to an address:port,
1124 and it's not the OR you were expecting, forget about that
1125 descriptor. If he *was* the one you were expecting, then forget
1126 about all other descriptors for that address:port.
1127 - Allow servers to publish descriptors from 12 hours in the future.
1128 Corollary: only whine about clock skew from the dirserver if
1129 he's a trusted dirserver (since now even verified servers could
1130 have quite wrong clocks).
1131 - Require servers that use the default dirservers to have public IP
1132 addresses. We have too many servers that are configured with private
1133 IPs and their admins never notice the log entries complaining that
1134 their descriptors are being rejected.
1136 o Efficiency improvements:
1137 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1138 and /dev/poll), and hopefully work better on Windows too.
1139 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1140 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1141 - Find libevent even if it's hiding in /usr/local/ and your
1142 CFLAGS and LDFLAGS don't tell you to look there.
1143 - Be able to link with libevent as a shared library (the default
1144 after 1.0d), even if it's hiding in /usr/local/lib and even
1145 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1146 assuming you're running gcc. Otherwise fail and give a useful
1148 - Switch to a new buffer management algorithm, which tries to avoid
1149 reallocing and copying quite as much. In first tests it looks like
1150 it uses *more* memory on average, but less cpu.
1151 - Switch our internal buffers implementation to use a ring buffer,
1152 to hopefully improve performance for fast servers a lot.
1153 - Reenable the part of the code that tries to flush as soon as an
1154 OR outbuf has a full TLS record available. Perhaps this will make
1155 OR outbufs not grow as huge except in rare cases, thus saving lots
1156 of CPU time plus memory.
1157 - Improve performance for dirservers: stop re-parsing the whole
1158 directory every time you regenerate it.
1159 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1160 it much faster to look up a circuit for each relay cell.
1161 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1162 since they're eating our cpu on exit nodes.
1163 - Stop wasting time doing a case insensitive comparison for every
1164 dns name every time we do any lookup. Canonicalize the names to
1165 lowercase when you first see them.
1168 - Handle unavailable hidden services better. Handle slow or busy
1169 hidden services better.
1170 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1171 circ as necessary, if there are any completed ones lying around
1172 when we try to launch one.
1173 - Make hidden services try to establish a rendezvous for 30 seconds
1174 after fetching the descriptor, rather than for n (where n=3)
1175 attempts to build a circuit.
1176 - Adjust maximum skew and age for rendezvous descriptors: let skew
1177 be 48 hours rather than 90 minutes.
1178 - Reject malformed .onion addresses rather then passing them on as
1179 normal web requests.
1182 - More Tor controller support. See
1183 http://tor.eff.org/doc/control-spec.txt for all the new features,
1184 including signals to emulate unix signals from any platform;
1185 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1186 closestream; closecircuit; etc.
1187 - Encode hashed controller passwords in hex instead of base64,
1188 to make it easier to write controllers.
1189 - Revise control spec and implementation to allow all log messages to
1190 be sent to controller with their severities intact (suggested by
1191 Matt Edman). Disable debug-level logs while delivering a debug-level
1192 log to the controller, to prevent loop. Update TorControl to handle
1193 new log event types.
1195 o New config options/defaults:
1196 - Begin scrubbing sensitive strings from logs by default. Turn off
1197 the config option SafeLogging if you need to do debugging.
1198 - New exit policy: accept most low-numbered ports, rather than
1199 rejecting most low-numbered ports.
1200 - Put a note in the torrc about abuse potential with the default
1202 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1204 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1205 based on patch from Adam Langley (basic auth only).
1206 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1207 the fast servers that have been joining lately. (Clients are now
1208 willing to load balance over up to 2 MB of advertised bandwidth
1210 - New config option MaxAdvertisedBandwidth which lets you advertise
1211 a low bandwidthrate (to not attract as many circuits) while still
1212 allowing a higher bandwidthrate in reality.
1213 - Require BandwidthRate to be at least 20kB/s for servers.
1214 - Add a NoPublish config option, so you can be a server (e.g. for
1215 testing running Tor servers in other Tor networks) without
1216 publishing your descriptor to the primary dirservers.
1217 - Add a new AddressMap config directive to rewrite incoming socks
1218 addresses. This lets you, for example, declare an implicit
1219 required exit node for certain sites.
1220 - Add a new TrackHostExits config directive to trigger addressmaps
1221 for certain incoming socks addresses -- for sites that break when
1222 your exit keeps changing (based on patch from Mike Perry).
1223 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1224 which describes how often we retry making new circuits if current
1225 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1226 how long we're willing to make use of an already-dirty circuit.
1227 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1228 a config option "ShutdownWaitLength" (when using kill -INT on
1230 - Fix an edge case in parsing config options: if they say "--"
1231 on the commandline, it's not a config option (thanks weasel).
1232 - New config option DirAllowPrivateAddresses for authdirservers.
1233 Now by default they refuse router descriptors that have non-IP or
1234 private-IP addresses.
1235 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1236 smart" default value: low for servers and high for clients.
1237 - Some people were putting "Address " in their torrc, and they had
1238 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1239 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1240 LOCALSTATEDIR/tor instead.
1241 - Implement --verify-config command-line option to check if your torrc
1242 is valid without actually launching Tor.
1244 o Logging improvements:
1245 - When dirservers refuse a server descriptor, we now log its
1246 contactinfo, platform, and the poster's IP address.
1247 - Only warn once per nickname from add_nickname_list_to_smartlist()
1248 per failure, so an entrynode or exitnode choice that's down won't
1250 - When we're connecting to an OR and he's got a different nickname/key
1251 than we were expecting, only complain loudly if we're an OP or a
1252 dirserver. Complaining loudly to the OR admins just confuses them.
1253 - Whine at you if you're a server and you don't set your contactinfo.
1254 - Warn when exit policy implicitly allows local addresses.
1255 - Give a better warning when some other server advertises an
1256 ORPort that is actually an apache running ssl.
1257 - If we get an incredibly skewed timestamp from a dirserver mirror
1258 that isn't a verified OR, don't warn -- it's probably him that's
1260 - When a dirserver causes you to give a warn, mention which dirserver
1262 - Initialize libevent later in the startup process, so the logs are
1263 already established by the time we start logging libevent warns.
1264 - Use correct errno on win32 if libevent fails.
1265 - Check and warn about known-bad/slow libevent versions.
1266 - Stop warning about sigpipes in the logs. We're going to
1267 pretend that getting these occassionally is normal and fine.
1269 o New contrib scripts:
1270 - New experimental script tor/contrib/exitlist: a simple python
1271 script to parse directories and find Tor nodes that exit to listed
1273 - New experimental script tor/contrib/ExerciseServer.py (needs more
1274 work) that uses the controller interface to build circuits and
1275 fetch pages over them. This will help us bootstrap servers that
1276 have lots of capacity but haven't noticed it yet.
1277 - New experimental script tor/contrib/PathDemo.py (needs more work)
1278 that uses the controller interface to let you choose whole paths
1280 "<hostname>.<path,separated by dots>.<length of path>.path"
1281 - New contributed script "privoxy-tor-toggle" to toggle whether
1282 Privoxy uses Tor. Seems to be configured for Debian by default.
1283 - Have torctl.in/tor.sh.in check for location of su binary (needed
1287 - chdir() to your datadirectory at the *end* of the daemonize process,
1288 not the beginning. This was a problem because the first time you
1289 run tor, if your datadir isn't there, and you have runasdaemon set
1290 to 1, it will try to chdir to it before it tries to create it. Oops.
1291 - Fix several double-mark-for-close bugs, e.g. where we were finding
1292 a conn for a cell even if that conn is already marked for close.
1293 - Stop most cases of hanging up on a socks connection without sending
1295 - Fix a bug in the RPM package: set home directory for _tor to
1296 something more reasonable when first installing.
1297 - Stop putting nodename in the Platform string in server descriptors.
1298 It doesn't actually help, and it is confusing/upsetting some people.
1299 - When using preferred entry or exit nodes, ignore whether the
1300 circuit wants uptime or capacity. They asked for the nodes, they
1302 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1303 artificially capped at 500kB.
1304 - Cache local dns resolves correctly even when they're .exit
1306 - If we're hibernating and we get a SIGINT, exit immediately.
1307 - tor-resolve requests were ignoring .exit if there was a working circuit
1308 they could use instead.
1309 - Pay more attention to the ClientOnly config option.
1310 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1311 installer screens; and don't put stuff into StartupItems unless
1312 the user asks you to.
1315 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1316 rather than just rejecting it.
1317 - If our clock jumps forward by 100 seconds or more, assume something
1318 has gone wrong with our network and abandon all not-yet-used circs.
1319 - When an application is using socks5, give him the whole variety of
1320 potential socks5 responses (connect refused, host unreachable, etc),
1321 rather than just "success" or "failure".
1322 - A more sane version numbering system. See
1323 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1324 - Change version parsing logic: a version is "obsolete" if it is not
1325 recommended and (1) there is a newer recommended version in the
1326 same series, or (2) there are no recommended versions in the same
1327 series, but there are some recommended versions in a newer series.
1328 A version is "new" if it is newer than any recommended version in
1330 - Report HTTP reasons to client when getting a response from directory
1331 servers -- so you can actually know what went wrong.
1332 - Reject odd-looking addresses at the client (e.g. addresses that
1333 contain a colon), rather than having the server drop them because
1335 - Stop publishing socksport in the directory, since it's not
1336 actually meant to be public. For compatibility, publish a 0 there
1338 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1339 cookies to disk and doesn't log each web request to disk. (Thanks
1340 to Brett Carrington for pointing this out.)
1341 - Add OSX uninstall instructions. An actual uninstall script will
1343 - Add "opt hibernating 1" to server descriptor to make it clearer
1344 whether the server is hibernating.
1347 Changes in version 0.0.9.10 - 2005-06-16
1348 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1349 - Refuse relay cells that claim to have a length larger than the
1350 maximum allowed. This prevents a potential attack that could read
1351 arbitrary memory (e.g. keys) from an exit server's process
1355 Changes in version 0.0.9.9 - 2005-04-23
1356 o Bugfixes on 0.0.9.x:
1357 - If unofficial Tor clients connect and send weird TLS certs, our
1358 Tor server triggers an assert. This release contains a minimal
1359 backport from the broader fix that we put into 0.1.0.4-rc.
1362 Changes in version 0.0.9.8 - 2005-04-07
1363 o Bugfixes on 0.0.9.x:
1364 - We have a bug that I haven't found yet. Sometimes, very rarely,
1365 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1366 thinks of itself as idle. This meant that no new circuits ever got
1367 established. Here's a workaround to kill any cpuworker that's been
1368 busy for more than 100 seconds.
1371 Changes in version 0.0.9.7 - 2005-04-01
1372 o Bugfixes on 0.0.9.x:
1373 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1374 - Compare identity to identity, not to nickname, when extending to
1375 a router not already in the directory. This was preventing us from
1376 extending to unknown routers. Oops.
1377 - Make sure to create OS X Tor user in <500 range, so we aren't
1378 creating actual system users.
1379 - Note where connection-that-hasn't-sent-end was marked, and fix
1380 a few really loud instances of this harmless bug (it's fixed more
1384 Changes in version 0.0.9.6 - 2005-03-24
1385 o Bugfixes on 0.0.9.x (crashes and asserts):
1386 - Add new end stream reasons to maintainance branch. Fix bug where
1387 reason (8) could trigger an assert. Prevent bug from recurring.
1388 - Apparently win32 stat wants paths to not end with a slash.
1389 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1390 blowing away the circuit that conn->cpath_layer points to, then
1391 checking to see if the circ is well-formed. Backport check to make
1392 sure we dont use the cpath on a closed connection.
1393 - Prevent circuit_resume_edge_reading_helper() from trying to package
1394 inbufs for marked-for-close streams.
1395 - Don't crash on hup if your options->address has become unresolvable.
1396 - Some systems (like OS X) sometimes accept() a connection and tell
1397 you the remote host is 0.0.0.0:0. If this happens, due to some
1398 other mis-features, we get confused; so refuse the conn for now.
1400 o Bugfixes on 0.0.9.x (other):
1401 - Fix harmless but scary "Unrecognized content encoding" warn message.
1402 - Add new stream error reason: TORPROTOCOL reason means "you are not
1403 speaking a version of Tor I understand; say bye-bye to your stream."
1404 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1405 into the future, now that we are more tolerant of skew. This
1406 resolves a bug where a Tor server would refuse to cache a directory
1407 because all the directories it gets are too far in the future;
1408 yet the Tor server never logs any complaints about clock skew.
1409 - Mac packaging magic: make man pages useable, and do not overwrite
1410 existing torrc files.
1411 - Make OS X log happily to /var/log/tor/tor.log
1414 Changes in version 0.0.9.5 - 2005-02-22
1415 o Bugfixes on 0.0.9.x:
1416 - Fix an assert race at exit nodes when resolve requests fail.
1417 - Stop picking unverified dir mirrors--it only leads to misery.
1418 - Patch from Matt Edman to make NT services work better. Service
1419 support is still not compiled into the executable by default.
1420 - Patch from Dmitri Bely so the Tor service runs better under
1421 the win32 SYSTEM account.
1422 - Make tor-resolve actually work (?) on Win32.
1423 - Fix a sign bug when getrlimit claims to have 4+ billion
1424 file descriptors available.
1425 - Stop refusing to start when bandwidthburst == bandwidthrate.
1426 - When create cells have been on the onion queue more than five
1427 seconds, just send back a destroy and take them off the list.
1430 Changes in version 0.0.9.4 - 2005-02-03
1431 o Bugfixes on 0.0.9:
1432 - Fix an assert bug that took down most of our servers: when
1433 a server claims to have 1 GB of bandwidthburst, don't
1435 - Don't crash as badly if we have spawned the max allowed number
1436 of dnsworkers, or we're out of file descriptors.
1437 - Block more file-sharing ports in the default exit policy.
1438 - MaxConn is now automatically set to the hard limit of max
1439 file descriptors we're allowed (ulimit -n), minus a few for
1441 - Give a clearer message when servers need to raise their
1442 ulimit -n when they start running out of file descriptors.
1443 - SGI Compatibility patches from Jan Schaumann.
1444 - Tolerate a corrupt cached directory better.
1445 - When a dirserver hasn't approved your server, list which one.
1446 - Go into soft hibernation after 95% of the bandwidth is used,
1447 not 99%. This is especially important for daily hibernators who
1448 have a small accounting max. Hopefully it will result in fewer
1449 cut connections when the hard hibernation starts.
1450 - Load-balance better when using servers that claim more than
1451 800kB/s of capacity.
1452 - Make NT services work (experimental, only used if compiled in).
1455 Changes in version 0.0.9.3 - 2005-01-21
1456 o Bugfixes on 0.0.9:
1457 - Backport the cpu use fixes from main branch, so busy servers won't
1458 need as much processor time.
1459 - Work better when we go offline and then come back, or when we
1460 run Tor at boot before the network is up. We do this by
1461 optimistically trying to fetch a new directory whenever an
1462 application request comes in and we think we're offline -- the
1463 human is hopefully a good measure of when the network is back.
1464 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1465 long as you keep using them; actually publish hidserv descriptors
1466 shortly after they change, rather than waiting 20-40 minutes.
1467 - Enable Mac startup script by default.
1468 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1469 - When you update AllowUnverifiedNodes or FirewallPorts via the
1470 controller's setconf feature, we were always appending, never
1472 - When you update HiddenServiceDir via setconf, it was screwing up
1473 the order of reading the lines, making it fail.
1474 - Do not rewrite a cached directory back to the cache; otherwise we
1475 will think it is recent and not fetch a newer one on startup.
1476 - Workaround for webservers that lie about Content-Encoding: Tor
1477 now tries to autodetect compressed directories and compression
1478 itself. This lets us Proxypass dir fetches through apache.
1481 Changes in version 0.0.9.2 - 2005-01-04
1482 o Bugfixes on 0.0.9 (crashes and asserts):
1483 - Fix an assert on startup when the disk is full and you're logging
1485 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
1486 style address, then we'd crash.
1487 - Fix an assert trigger when the running-routers string we get from
1488 a dirserver is broken.
1489 - Make worker threads start and run on win32. Now win32 servers
1491 - Bandaid (not actually fix, but now it doesn't crash) an assert
1492 where the dns worker dies mysteriously and the main Tor process
1493 doesn't remember anything about the address it was resolving.
1495 o Bugfixes on 0.0.9 (Win32):
1496 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
1497 name out of the warning/assert messages.
1498 - Fix a superficial "unhandled error on read" bug on win32.
1499 - The win32 installer no longer requires a click-through for our
1500 license, since our Free Software license grants rights but does not
1502 - Win32: When connecting to a dirserver fails, try another one
1503 immediately. (This was already working for non-win32 Tors.)
1504 - Stop trying to parse $HOME on win32 when hunting for default
1506 - Make tor-resolve.c work on win32 by calling network_init().
1508 o Bugfixes on 0.0.9 (other):
1509 - Make 0.0.9.x build on Solaris again.
1510 - Due to a fencepost error, we were blowing away the \n when reporting
1511 confvalue items in the controller. So asking for multiple config
1512 values at once couldn't work.
1513 - When listing circuits that are pending on an opening OR connection,
1514 if we're an OR we were listing circuits that *end* at us as
1515 being pending on every listener, dns/cpu worker, etc. Stop that.
1516 - Dirservers were failing to create 'running-routers' or 'directory'
1517 strings if we had more than some threshold of routers. Fix them so
1518 they can handle any number of routers.
1519 - Fix a superficial "Duplicate mark for close" bug.
1520 - Stop checking for clock skew for OR connections, even for servers.
1521 - Fix a fencepost error that was chopping off the last letter of any
1522 nickname that is the maximum allowed nickname length.
1523 - Update URLs in log messages so they point to the new website.
1524 - Fix a potential problem in mangling server private keys while
1525 writing to disk (not triggered yet, as far as we know).
1526 - Include the licenses for other free software we include in Tor,
1527 now that we're shipping binary distributions more regularly.
1530 Changes in version 0.0.9.1 - 2004-12-15
1531 o Bugfixes on 0.0.9:
1532 - Make hibernation actually work.
1533 - Make HashedControlPassword config option work.
1534 - When we're reporting event circuit status to a controller,
1535 don't use the stream status code.
1538 Changes in version 0.0.9 - 2004-12-12
1539 o Bugfixes on 0.0.8.1 (Crashes and asserts):
1540 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
1541 write() call will fail and we handle it there.
1542 - When we run out of disk space, or other log writing error, don't
1543 crash. Just stop logging to that log and continue.
1544 - Fix isspace() and friends so they still make Solaris happy
1545 but also so they don't trigger asserts on win32.
1546 - Fix assert failure on malformed socks4a requests.
1547 - Fix an assert bug where a hidden service provider would fail if
1548 the first hop of his rendezvous circuit was down.
1549 - Better handling of size_t vs int, so we're more robust on 64
1552 o Bugfixes on 0.0.8.1 (Win32):
1553 - Make windows sockets actually non-blocking (oops), and handle
1554 win32 socket errors better.
1555 - Fix parse_iso_time on platforms without strptime (eg win32).
1556 - win32: when being multithreaded, leave parent fdarray open.
1557 - Better handling of winsock includes on non-MSV win32 compilers.
1558 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
1560 - Make unit tests work on win32.
1562 o Bugfixes on 0.0.8.1 (Path selection and streams):
1563 - Calculate timeout for waiting for a connected cell from the time
1564 we sent the begin cell, not from the time the stream started. If
1565 it took a long time to establish the circuit, we would time out
1566 right after sending the begin cell.
1567 - Fix router_compare_addr_to_addr_policy: it was not treating a port
1568 of * as always matching, so we were picking reject *:* nodes as
1569 exit nodes too. Oops.
1570 - When read() failed on a stream, we would close it without sending
1571 back an end. So 'connection refused' would simply be ignored and
1572 the user would get no response.
1573 - Stop a sigpipe: when an 'end' cell races with eof from the app,
1574 we shouldn't hold-open-until-flush if the eof arrived first.
1575 - Let resolve conns retry/expire also, rather than sticking around
1577 - Fix more dns related bugs: send back resolve_failed and end cells
1578 more reliably when the resolve fails, rather than closing the
1579 circuit and then trying to send the cell. Also attach dummy resolve
1580 connections to a circuit *before* calling dns_resolve(), to fix
1581 a bug where cached answers would never be sent in RESOLVED cells.
1583 o Bugfixes on 0.0.8.1 (Circuits):
1584 - Finally fix a bug that's been plaguing us for a year:
1585 With high load, circuit package window was reaching 0. Whenever
1586 we got a circuit-level sendme, we were reading a lot on each
1587 socket, but only writing out a bit. So we would eventually reach
1588 eof. This would be noticed and acted on even when there were still
1589 bytes sitting in the inbuf.
1590 - Use identity comparison, not nickname comparison, to choose which
1591 half of circuit-ID-space each side gets to use. This is needed
1592 because sometimes we think of a router as a nickname, and sometimes
1593 as a hex ID, and we can't predict what the other side will do.
1595 o Bugfixes on 0.0.8.1 (Other):
1596 - Fix a whole slew of memory leaks.
1597 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
1598 - If we are using select, make sure we stay within FD_SETSIZE.
1599 - When poll() is interrupted, we shouldn't believe the revents values.
1600 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
1601 and smartlist_len, which are two major profiling offenders.
1602 - If do_hup fails, actually notice.
1603 - Flush the log file descriptor after we print "Tor opening log file",
1604 so we don't see those messages days later.
1605 - Hidden service operators now correctly handle version 1 style
1606 INTRODUCE1 cells (nobody generates them still, so not a critical
1608 - Handle more errnos from accept() without closing the listener.
1609 Some OpenBSD machines were closing their listeners because
1610 they ran out of file descriptors.
1611 - Some people had wrapped their tor client/server in a script
1612 that would restart it whenever it died. This did not play well
1613 with our "shut down if your version is obsolete" code. Now people
1614 don't fetch a new directory if their local cached version is
1616 - Make our autogen.sh work on ksh as well as bash.
1617 - Better torrc example lines for dirbindaddress and orbindaddress.
1618 - Improved bounds checking on parsed ints (e.g. config options and
1619 the ones we find in directories.)
1620 - Stop using separate defaults for no-config-file and
1621 empty-config-file. Now you have to explicitly turn off SocksPort,
1622 if you don't want it open.
1623 - We were starting to daemonize before we opened our logs, so if
1624 there were any problems opening logs, we would complain to stderr,
1625 which wouldn't work, and then mysteriously exit.
1626 - If a verified OR connects to us before he's uploaded his descriptor,
1627 or we verify him and hup but he still has the original TLS
1628 connection, then conn->nickname is still set like he's unverified.
1630 o Code security improvements, inspired by Ilja:
1631 - tor_snprintf wrapper over snprintf with consistent (though not C99)
1633 - Replace sprintf with tor_snprintf. (I think they were all safe, but
1635 - Replace strcpy/strncpy with strlcpy in more places.
1636 - Avoid strcat; use tor_snprintf or strlcat instead.
1638 o Features (circuits and streams):
1639 - New circuit building strategy: keep a list of ports that we've
1640 used in the past 6 hours, and always try to have 2 circuits open
1641 or on the way that will handle each such port. Seed us with port
1642 80 so web users won't complain that Tor is "slow to start up".
1643 - Make kill -USR1 dump more useful stats about circuits.
1644 - When warning about retrying or giving up, print the address, so
1645 the user knows which one it's talking about.
1646 - If you haven't used a clean circuit in an hour, throw it away,
1647 just to be on the safe side. (This means after 6 hours a totally
1648 unused Tor client will have no circuits open.)
1649 - Support "foo.nickname.exit" addresses, to let Alice request the
1650 address "foo" as viewed by exit node "nickname". Based on a patch
1652 - If your requested entry or exit node has advertised bandwidth 0,
1654 - Be more greedy about filling up relay cells -- we try reading again
1655 once we've processed the stuff we read, in case enough has arrived
1656 to fill the last cell completely.
1657 - Refuse application socks connections to port 0.
1658 - Use only 0.0.9pre1 and later servers for resolve cells.
1660 o Features (bandwidth):
1661 - Hibernation: New config option "AccountingMax" lets you
1662 set how many bytes per month (in each direction) you want to
1663 allow your server to consume. Rather than spreading those
1664 bytes out evenly over the month, we instead hibernate for some
1665 of the month and pop up at a deterministic time, work until
1666 the bytes are consumed, then hibernate again. Config option
1667 "MonthlyAccountingStart" lets you specify which day of the month
1668 your billing cycle starts on.
1669 - Implement weekly/monthly/daily accounting: now you specify your
1670 hibernation properties by
1671 AccountingMax N bytes|KB|MB|GB|TB
1672 AccountingStart day|week|month [day] HH:MM
1673 Defaults to "month 1 0:00".
1674 - Let bandwidth and interval config options be specified as 5 bytes,
1675 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
1677 o Features (directories):
1678 - New "router-status" line in directory, to better bind each verified
1679 nickname to its identity key.
1680 - Clients can ask dirservers for /dir.z to get a compressed version
1681 of the directory. Only works for servers running 0.0.9, of course.
1682 - Make clients cache directories and use them to seed their router
1683 lists at startup. This means clients have a datadir again.
1684 - Respond to content-encoding headers by trying to uncompress as
1686 - Clients and servers now fetch running-routers; cache
1687 running-routers; compress running-routers; serve compressed
1689 - Make moria2 advertise a dirport of 80, so people behind firewalls
1690 will be able to get a directory.
1691 - Http proxy support
1692 - Dirservers translate requests for http://%s:%d/x to /x
1693 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
1694 be routed through this host.
1695 - Clients ask for /tor/x rather than /x for new enough dirservers.
1696 This way we can one day coexist peacefully with apache.
1697 - Clients specify a "Host: %s%d" http header, to be compatible
1698 with more proxies, and so running squid on an exit node can work.
1699 - Protect dirservers from overzealous descriptor uploading -- wait
1700 10 seconds after directory gets dirty, before regenerating.
1702 o Features (packages and install):
1703 - Add NSI installer contributed by J Doe.
1704 - Apply NT service patch from Osamu Fujino. Still needs more work.
1705 - Commit VC6 and VC7 workspace/project files.
1706 - Commit a tor.spec for making RPM files, with help from jbash.
1707 - Add contrib/torctl.in contributed by Glenn Fink.
1708 - Make expand_filename handle ~ and ~username.
1709 - Use autoconf to enable largefile support where necessary. Use
1710 ftello where available, since ftell can fail at 2GB.
1711 - Ship src/win32/ in the tarball, so people can use it to build.
1712 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
1715 o Features (ui controller):
1716 - Control interface: a separate program can now talk to your
1717 client/server over a socket, and get/set config options, receive
1718 notifications of circuits and streams starting/finishing/dying,
1719 bandwidth used, etc. The next step is to get some GUIs working.
1720 Let us know if you want to help out. See doc/control-spec.txt .
1721 - Ship a contrib/tor-control.py as an example script to interact
1722 with the control port.
1723 - "tor --hash-password zzyxz" will output a salted password for
1724 use in authenticating to the control interface.
1725 - Implement the control-spec's SAVECONF command, to write your
1726 configuration to torrc.
1727 - Get cookie authentication for the controller closer to working.
1728 - When set_conf changes our server descriptor, upload a new copy.
1729 But don't upload it too often if there are frequent changes.
1731 o Features (config and command-line):
1732 - Deprecate unofficial config option abbreviations, and abbreviations
1733 not on the command line.
1734 - Configuration infrastructure support for warning on obsolete
1736 - Give a slightly more useful output for "tor -h".
1737 - Break DirFetchPostPeriod into:
1738 - DirFetchPeriod for fetching full directory,
1739 - StatusFetchPeriod for fetching running-routers,
1740 - DirPostPeriod for posting server descriptor,
1741 - RendPostPeriod for posting hidden service descriptors.
1742 - New log format in config:
1743 "Log minsev[-maxsev] stdout|stderr|syslog" or
1744 "Log minsev[-maxsev] file /var/foo"
1745 - DirPolicy config option, to let people reject incoming addresses
1746 from their dirserver.
1747 - "tor --list-fingerprint" will list your identity key fingerprint
1749 - Make tor --version --version dump the cvs Id of every file.
1750 - New 'MyFamily nick1,...' config option for a server to
1751 specify other servers that shouldn't be used in the same circuit
1752 with it. Only believed if nick1 also specifies us.
1753 - New 'NodeFamily nick1,nick2,...' config option for a client to
1754 specify nodes that it doesn't want to use in the same circuit.
1755 - New 'Redirectexit pattern address:port' config option for a
1756 server to redirect exit connections, e.g. to a local squid.
1757 - Add "pass" target for RedirectExit, to make it easier to break
1758 out of a sequence of RedirectExit rules.
1759 - Make the dirservers file obsolete.
1760 - Include a dir-signing-key token in directories to tell the
1761 parsing entity which key is being used to sign.
1762 - Remove the built-in bulky default dirservers string.
1763 - New config option "Dirserver %s:%d [fingerprint]", which can be
1764 repeated as many times as needed. If no dirservers specified,
1765 default to moria1,moria2,tor26.
1766 - Make 'Routerfile' config option obsolete.
1767 - Discourage people from setting their dirfetchpostperiod more often
1768 than once per minute.
1771 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
1772 get back to normal.)
1773 - Accept *:706 (silc) in default exit policy.
1774 - Implement new versioning format for post 0.1.
1775 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
1776 log more informatively.
1777 - Check clock skew for verified servers, but allow unverified
1778 servers and clients to have any clock skew.
1779 - Make sure the hidden service descriptors are at a random offset
1780 from each other, to hinder linkability.
1781 - Clients now generate a TLS cert too, in preparation for having
1782 them act more like real nodes.
1783 - Add a pure-C tor-resolve implementation.
1784 - Use getrlimit and friends to ensure we can reach MaxConn (currently
1785 1024) file descriptors.
1786 - Raise the max dns workers from 50 to 100.
1789 Changes in version 0.0.8.1 - 2004-10-13
1791 - Fix a seg fault that can be triggered remotely for Tor
1792 clients/servers with an open dirport.
1793 - Fix a rare assert trigger, where routerinfos for entries in
1794 our cpath would expire while we're building the path.
1795 - Fix a bug in OutboundBindAddress so it (hopefully) works.
1796 - Fix a rare seg fault for people running hidden services on
1797 intermittent connections.
1798 - Fix a bug in parsing opt keywords with objects.
1799 - Fix a stale pointer assert bug when a stream detaches and
1801 - Fix a string format vulnerability (probably not exploitable)
1802 in reporting stats locally.
1803 - Fix an assert trigger: sometimes launching circuits can fail
1804 immediately, e.g. because too many circuits have failed recently.
1805 - Fix a compile warning on 64 bit platforms.
1808 Changes in version 0.0.8 - 2004-08-25
1810 - Made our unit tests compile again on OpenBSD 3.5, and tor
1811 itself compile again on OpenBSD on a sparc64.
1812 - We were neglecting milliseconds when logging on win32, so
1813 everything appeared to happen at the beginning of each second.
1814 - Check directory signature _before_ you decide whether you're
1815 you're running an obsolete version and should exit.
1816 - Check directory signature _before_ you parse the running-routers
1817 list to decide who's running.
1818 - Check return value of fclose while writing to disk, so we don't
1819 end up with broken files when servers run out of disk space.
1820 - Port it to SunOS 5.9 / Athena
1821 - Fix two bugs in saving onion keys to disk when rotating, so
1822 hopefully we'll get fewer people using old onion keys.
1823 - Remove our mostly unused -- and broken -- hex_encode()
1824 function. Use base16_encode() instead. (Thanks to Timo Lindfors
1825 for pointing out this bug.)
1826 - Only pick and establish intro points after we've gotten a
1828 - Fix assert triggers: if the other side returns an address 0.0.0.0,
1829 don't put it into the client dns cache.
1830 - If a begin failed due to exit policy, but we believe the IP
1831 address should have been allowed, switch that router to exitpolicy
1832 reject *:* until we get our next directory.
1835 - 'Extend' relay cell payloads now include the digest of the
1836 intended next hop's identity key. Now we can verify that we're
1837 extending to the right router, and also extend to routers we
1838 hadn't heard of before.
1841 - Tor nodes can now act as relays (with an advertised ORPort)
1842 without being manually verified by the dirserver operators.
1843 - Uploaded descriptors of unverified routers are now accepted
1844 by the dirservers, and included in the directory.
1845 - Verified routers are listed by nickname in the running-routers
1846 list; unverified routers are listed as "$<fingerprint>".
1847 - We now use hash-of-identity-key in most places rather than
1848 nickname or addr:port, for improved security/flexibility.
1849 - AllowUnverifiedNodes config option to let circuits choose no-name
1850 routers in entry,middle,exit,introduction,rendezvous positions.
1851 Allow middle and rendezvous positions by default.
1852 - When picking unverified routers, skip those with low uptime and/or
1853 low bandwidth, depending on what properties you care about.
1854 - ClientOnly option for nodes that never want to become servers.
1855 - Directory caching.
1856 - "AuthoritativeDir 1" option for the official dirservers.
1857 - Now other nodes (clients and servers) will cache the latest
1858 directory they've pulled down.
1859 - They can enable their DirPort to serve it to others.
1860 - Clients will pull down a directory from any node with an open
1861 DirPort, and check the signature/timestamp correctly.
1862 - Authoritative dirservers now fetch directories from other
1863 authdirservers, to stay better synced.
1864 - Running-routers list tells who's down also, along with noting
1865 if they're verified (listed by nickname) or unverified (listed
1867 - Allow dirservers to serve running-router list separately.
1868 This isn't used yet.
1869 - You can now fetch $DIRURL/running-routers to get just the
1870 running-routers line, not the whole descriptor list. (But
1871 clients don't use this yet.)
1872 - Clients choose nodes proportional to advertised bandwidth.
1873 - Clients avoid using nodes with low uptime as introduction points.
1874 - Handle servers with dynamic IP addresses: don't just replace
1875 options->Address with the resolved one at startup, and
1876 detect our address right before we make a routerinfo each time.
1877 - 'FascistFirewall' option to pick dirservers and ORs on specific
1878 ports; plus 'FirewallPorts' config option to tell FascistFirewall
1879 which ports are open. (Defaults to 80,443)
1880 - Try other dirservers immediately if the one you try is down. This
1881 should tolerate down dirservers better now.
1882 - ORs connect-on-demand to other ORs
1883 - If you get an extend cell to an OR you're not connected to,
1884 connect, handshake, and forward the create cell.
1885 - The authoritative dirservers stay connected to everybody,
1886 and everybody stays connected to 0.0.7 servers, but otherwise
1887 clients/servers expire unused connections after 5 minutes.
1888 - When servers get a sigint, they delay 30 seconds (refusing new
1889 connections) then exit. A second sigint causes immediate exit.
1890 - File and name management:
1891 - Look for .torrc if no CONFDIR "torrc" is found.
1892 - If no datadir is defined, then choose, make, and secure ~/.tor
1894 - If torrc not found, exitpolicy reject *:*.
1895 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
1896 - If no nickname is defined, derive default from hostname.
1897 - Rename secret key files, e.g. identity.key -> secret_id_key,
1898 to discourage people from mailing their identity key to tor-ops.
1899 - Refuse to build a circuit before the directory has arrived --
1900 it won't work anyway, since you won't know the right onion keys
1902 - Parse tor version numbers so we can do an is-newer-than check
1903 rather than an is-in-the-list check.
1904 - New socks command 'resolve', to let us shim gethostbyname()
1906 - A 'tor_resolve' script to access the socks resolve functionality.
1907 - A new socks-extensions.txt doc file to describe our
1908 interpretation and extensions to the socks protocols.
1909 - Add a ContactInfo option, which gets published in descriptor.
1910 - Write tor version at the top of each log file
1911 - New docs in the tarball:
1913 - Document that you should proxy your SSL traffic too.
1914 - Log a warning if the user uses an unsafe socks variant, so people
1915 are more likely to learn about privoxy or socat.
1916 - Log a warning if you're running an unverified server, to let you
1917 know you might want to get it verified.
1918 - Change the default exit policy to reject the default edonkey,
1919 kazaa, gnutella ports.
1920 - Add replace_file() to util.[ch] to handle win32's rename().
1921 - Publish OR uptime in descriptor (and thus in directory) too.
1922 - Remember used bandwidth (both in and out), and publish 15-minute
1923 snapshots for the past day into our descriptor.
1924 - Be more aggressive about trying to make circuits when the network
1925 has changed (e.g. when you unsuspend your laptop).
1926 - Check for time skew on http headers; report date in response to
1928 - If the entrynode config line has only one node, don't pick it as
1930 - Add strict{entry|exit}nodes config options. If set to 1, then
1931 we refuse to build circuits that don't include the specified entry
1933 - OutboundBindAddress config option, to bind to a specific
1934 IP address for outgoing connect()s.
1935 - End truncated log entries (e.g. directories) with "[truncated]".
1938 Changes in version 0.0.7.3 - 2004-08-12
1939 o Stop dnsworkers from triggering an assert failure when you
1940 ask them to resolve the host "".
1943 Changes in version 0.0.7.2 - 2004-07-07
1944 o A better fix for the 0.0.0.0 problem, that will hopefully
1945 eliminate the remaining related assertion failures.
1948 Changes in version 0.0.7.1 - 2004-07-04
1949 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
1950 since internally we use 0.0.0.0 to signify "not yet resolved".
1953 Changes in version 0.0.7 - 2004-06-07
1954 o Fixes for crashes and other obnoxious bugs:
1955 - Fix an epipe bug: sometimes when directory connections failed
1956 to connect, we would give them a chance to flush before closing
1958 - When we detached from a circuit because of resolvefailed, we
1959 would immediately try the same circuit twice more, and then
1960 give up on the resolve thinking we'd tried three different
1962 - Limit the number of intro circuits we'll attempt to build for a
1963 hidden service per 15-minute period.
1964 - Check recommended-software string *early*, before actually parsing
1965 the directory. Thus we can detect an obsolete version and exit,
1966 even if the new directory format doesn't parse.
1967 o Fixes for security bugs:
1968 - Remember which nodes are dirservers when you startup, and if a
1969 random OR enables his dirport, don't automatically assume he's
1970 a trusted dirserver.
1972 - Directory connections were asking the wrong poll socket to
1973 start writing, and not asking themselves to start writing.
1974 - When we detached from a circuit because we sent a begin but
1975 didn't get a connected, we would use it again the first time;
1976 but after that we would correctly switch to a different one.
1977 - Stop warning when the first onion decrypt attempt fails; they
1978 will sometimes legitimately fail now that we rotate keys.
1979 - Override unaligned-access-ok check when $host_cpu is ia64 or
1980 arm. Apparently they allow it but the kernel whines.
1981 - Dirservers try to reconnect periodically too, in case connections
1983 - Fix some memory leaks in directory servers.
1984 - Allow backslash in Win32 filenames.
1985 - Made Tor build complain-free on FreeBSD, hopefully without
1986 breaking other BSD builds. We'll see.
1987 - Check directory signatures based on name of signer, not on whom
1988 we got the directory from. This will let us cache directories more
1990 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
1993 - Doxygen markup on all functions and global variables.
1994 - Make directory functions update routerlist, not replace it. So
1995 now directory disagreements are not so critical a problem.
1996 - Remove the upper limit on number of descriptors in a dirserver's
1997 directory (not that we were anywhere close).
1998 - Allow multiple logfiles at different severity ranges.
1999 - Allow *BindAddress to specify ":port" rather than setting *Port
2000 separately. Allow multiple instances of each BindAddress config
2001 option, so you can bind to multiple interfaces if you want.
2002 - Allow multiple exit policy lines, which are processed in order.
2003 Now we don't need that huge line with all the commas in it.
2004 - Enable accept/reject policies on SOCKS connections, so you can bind
2005 to 0.0.0.0 but still control who can use your OP.
2006 - Updated the man page to reflect these features.
2009 Changes in version 0.0.6.2 - 2004-05-16
2010 o Our integrity-checking digest was checking only the most recent cell,
2011 not the previous cells like we'd thought.
2012 Thanks to Stefan Mark for finding the flaw!
2015 Changes in version 0.0.6.1 - 2004-05-06
2016 o Fix two bugs in our AES counter-mode implementation (this affected
2017 onion-level stream encryption, but not TLS-level). It turns
2018 out we were doing something much more akin to a 16-character
2019 polyalphabetic cipher. Oops.
2020 Thanks to Stefan Mark for finding the flaw!
2021 o Retire moria3 as a directory server, and add tor26 as a directory
2025 Changes in version 0.0.6 - 2004-05-02
2027 - Hidden services and rendezvous points are implemented. Go to
2028 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2029 hidden services. (This only works via a socks4a proxy such as
2030 Privoxy, and currently it's quite slow.)
2031 - We now rotate link (tls context) keys and onion keys.
2032 - CREATE cells now include oaep padding, so you can tell
2033 if you decrypted them correctly.
2034 - Retry stream correctly when we fail to connect because of
2035 exit-policy-reject (should try another) or can't-resolve-address.
2036 - When we hup a dirserver and we've *removed* a server from the
2037 approved-routers list, now we remove that server from the
2038 in-memory directories too.
2039 - Add bandwidthburst to server descriptor.
2040 - Directories now say which dirserver signed them.
2041 - Use a tor_assert macro that logs failed assertions too.
2042 - Since we don't support truncateds much, don't bother sending them;
2043 just close the circ.
2044 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2045 - Better debugging for tls errors
2046 - Set Content-Type on the directory and hidserv descriptor.
2047 - Remove IVs from cipher code, since AES-ctr has none.
2049 - Fix an assert trigger for exit nodes that's been plaguing us since
2050 the days of 0.0.2prexx (thanks weasel!)
2051 - Fix a bug where we were closing tls connections intermittently.
2052 It turns out openssl keeps its errors around -- so if an error
2053 happens, and you don't ask about it, and then another openssl
2054 operation happens and succeeds, and you ask if there was an error,
2055 it tells you about the first error.
2056 - Fix a bug that's been lurking since 27 may 03 (!)
2057 When passing back a destroy cell, we would use the wrong circ id.
2058 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2059 - Some versions of openssl have an SSL_pending function that erroneously
2060 returns bytes when there is a non-application record pending.
2061 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2062 o We were using an array of length zero in a few places.
2063 o Win32's gethostbyname can't resolve an IP to an IP.
2064 o Win32's close can't close a socket.
2065 o Handle windows socket errors correctly.
2067 - check for <sys/limits.h> so we build on FreeBSD again, and
2068 <machine/limits.h> for NetBSD.
2071 Changes in version 0.0.5 - 2004-03-30
2072 o Install torrc as torrc.sample -- we no longer clobber your
2074 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2075 o Only build circuits after we've fetched the directory: clients were
2076 using only the directory servers before they'd fetched a directory.
2077 This also means longer startup time; so it goes.
2078 o Fix an assert trigger where an OP would fail to handshake, and we'd
2079 expect it to have a nickname.
2080 o Work around a tsocks bug: do a socks reject when AP connection dies
2081 early, else tsocks goes into an infinite loop.
2082 o Hold socks connection open until reply is flushed (if possible)
2083 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2084 the dns farm to do it.
2085 o Fix c99 aliasing warnings in rephist.c
2086 o Don't include server descriptors that are older than 24 hours in the
2088 o Give socks 'reject' replies their whole 15s to attempt to flush,
2089 rather than seeing the 60s timeout and assuming the flush had failed.
2090 o Clean automake droppings from the cvs repository
2091 o Add in a 'notice' log level for things the operator should hear
2092 but that aren't warnings
2095 Changes in version 0.0.4 - 2004-03-26
2096 o When connecting to a dirserver or OR and the network is down,
2100 Changes in version 0.0.3 - 2004-03-26
2101 o Warn and fail if server chose a nickname with illegal characters
2102 o Port to Solaris and Sparc:
2103 - include missing header fcntl.h
2104 - have autoconf find -lsocket -lnsl automatically
2105 - deal with hardware word alignment
2106 - make uname() work (solaris has a different return convention)
2107 - switch from using signal() to sigaction()
2108 o Preliminary work on reputation system:
2109 - Keep statistics on success/fail of connect attempts; they're published
2110 by kill -USR1 currently.
2111 - Add a RunTesting option to try to learn link state by creating test
2112 circuits, even when SocksPort is off.
2113 - Remove unused open circuits when there are too many.
2116 Changes in version 0.0.2 - 2004-03-19
2117 - Include strlcpy and strlcat for safer string ops
2118 - define INADDR_NONE so we compile (but still not run) on solaris
2121 Changes in version 0.0.2pre27 - 2004-03-14
2123 - Allow internal tor networks (we were rejecting internal IPs,
2124 now we allow them if they're set explicitly).
2125 - And fix a few endian issues.
2128 Changes in version 0.0.2pre26 - 2004-03-14
2130 - If a stream times out after 15s without a connected cell, don't
2131 try that circuit again: try a new one.
2132 - Retry streams at most 4 times. Then give up.
2133 - When a dirserver gets a descriptor from an unknown router, it
2134 logs its fingerprint (so the dirserver operator can choose to
2135 accept it even without mail from the server operator).
2136 - Inform unapproved servers when we reject their descriptors.
2137 - Make tor build on Windows again. It works as a client, who knows
2139 - Clearer instructions in the torrc for how to set up a server.
2140 - Be more efficient about reading fd's when our global token bucket
2141 (used for rate limiting) becomes empty.
2143 - Stop asserting that computers always go forward in time. It's
2145 - When we sent a cell (e.g. destroy) and then marked an OR connection
2146 expired, we might close it before finishing a flush if the other
2147 side isn't reading right then.
2148 - Don't allow dirservers to start if they haven't defined
2150 - We were caching transient dns failures. Oops.
2151 - Prevent servers from publishing an internal IP as their address.
2152 - Address a strcat vulnerability in circuit.c
2155 Changes in version 0.0.2pre25 - 2004-03-04
2157 - Put the OR's IP in its router descriptor, not its fqdn. That way
2158 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2161 - If the user typed in an address that didn't resolve, the server
2165 Changes in version 0.0.2pre24 - 2004-03-03
2167 - Fix an assertion failure in dns.c, where we were trying to dequeue
2168 a pending dns resolve even if it wasn't pending
2169 - Fix a spurious socks5 warning about still trying to write after the
2170 connection is finished.
2171 - Hold certain marked_for_close connections open until they're finished
2172 flushing, rather than losing bytes by closing them too early.
2173 - Correctly report the reason for ending a stream
2174 - Remove some duplicate calls to connection_mark_for_close
2175 - Put switch_id and start_daemon earlier in the boot sequence, so it
2176 will actually try to chdir() to options.DataDirectory
2177 - Make 'make test' exit(1) if a test fails; fix some unit tests
2178 - Make tor fail when you use a config option it doesn't know about,
2179 rather than warn and continue.
2180 - Make --version work
2181 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2184 Changes in version 0.0.2pre23 - 2004-02-29
2186 - Print a statement when the first circ is finished, so the user
2188 - If a relay cell is unrecognized at the end of the circuit,
2189 send back a destroy. (So attacks to mutate cells are more
2191 - New config option 'excludenodes' to avoid certain nodes for circuits.
2192 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2193 so you can collect coredumps there.
2195 - Fix a bug in tls flushing where sometimes data got wedged and
2196 didn't flush until more data got sent. Hopefully this bug was
2197 a big factor in the random delays we were seeing.
2198 - Make 'connected' cells include the resolved IP, so the client
2199 dns cache actually gets populated.
2200 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2201 - When we time-out on a stream and detach from the circuit, send an
2202 end cell down it first.
2203 - Only warn about an unknown router (in exitnodes, entrynodes,
2204 excludenodes) after we've fetched a directory.
2207 Changes in version 0.0.2pre22 - 2004-02-26
2209 - Servers publish less revealing uname information in descriptors.
2210 - More memory tracking and assertions, to crash more usefully when
2212 - If the default torrc isn't there, just use some default defaults.
2213 Plus provide an internal dirservers file if they don't have one.
2214 - When the user tries to use Tor as an http proxy, give them an http
2215 501 failure explaining that we're a socks proxy.
2216 - Dump a new router.desc on hup, to help confused people who change
2217 their exit policies and then wonder why router.desc doesn't reflect
2219 - Clean up the generic tor.sh init script that we ship with.
2221 - If the exit stream is pending on the resolve, and a destroy arrives,
2222 then the stream wasn't getting removed from the pending list. I
2223 think this was the one causing recent server crashes.
2224 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2225 - When it couldn't resolve any dirservers, it was useless from then on.
2226 Now it reloads the RouterFile (or default dirservers) if it has no
2228 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2229 many users don't even *have* a /usr/local/sbin/.
2232 Changes in version 0.0.2pre21 - 2004-02-18
2234 - There's a ChangeLog file that actually reflects the changelog.
2235 - There's a 'torify' wrapper script, with an accompanying
2236 tor-tsocks.conf, that simplifies the process of using tsocks for
2237 tor. It even has a man page.
2238 - The tor binary gets installed to sbin rather than bin now.
2239 - Retry streams where the connected cell hasn't arrived in 15 seconds
2240 - Clean up exit policy handling -- get the default out of the torrc,
2241 so we can update it without forcing each server operator to fix
2243 - Allow imaps and pop3s in default exit policy
2245 - Prevent picking middleman nodes as the last node in the circuit
2248 Changes in version 0.0.2pre20 - 2004-01-30
2250 - We now have a deb package, and it's in debian unstable. Go to
2252 - I've split the TotalBandwidth option into BandwidthRate (how many
2253 bytes per second you want to allow, long-term) and
2254 BandwidthBurst (how many bytes you will allow at once before the cap
2255 kicks in). This better token bucket approach lets you, say, set
2256 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2257 performance while not exceeding your monthly bandwidth quota.
2258 - Push out a tls record's worth of data once you've got it, rather
2259 than waiting until you've read everything waiting to be read. This
2260 may improve performance by pipelining better. We'll see.
2261 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2262 from failed circuits (if they haven't been connected yet) and attach
2264 - Expire old streams that haven't managed to connect. Some day we'll
2265 have them reattach to new circuits instead.
2268 - Fix several memory leaks that were causing servers to become bloated
2270 - Fix a few very rare assert triggers. A few more remain.
2271 - Setuid to User _before_ complaining about running as root.
2274 Changes in version 0.0.2pre19 - 2004-01-07
2276 - Fix deadlock condition in dns farm. We were telling a child to die by
2277 closing the parent's file descriptor to him. But newer children were
2278 inheriting the open file descriptor from the parent, and since they
2279 weren't closing it, the socket never closed, so the child never read
2280 eof, so he never knew to exit. Similarly, dns workers were holding
2281 open other sockets, leading to all sorts of chaos.
2282 - New cleaner daemon() code for forking and backgrounding.
2283 - If you log to a file, it now prints an entry at the top of the
2284 logfile so you know it's working.
2285 - The onionskin challenge length was 30 bytes longer than necessary.
2286 - Started to patch up the spec so it's not quite so out of date.
2289 Changes in version 0.0.2pre18 - 2004-01-02
2291 - Fix endian issues with the 'integrity' field in the relay header.
2292 - Fix a potential bug where connections in state
2293 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2296 Changes in version 0.0.2pre17 - 2003-12-30
2298 - Made --debuglogfile (or any second log file, actually) work.
2299 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2300 adversary could force us into an infinite loop.
2303 - Each onionskin handshake now includes a hash of the computed key,
2304 to prove the server's identity and help perfect forward secrecy.
2305 - Changed cell size from 256 to 512 bytes (working toward compatibility
2307 - Changed cell length to 2 bytes, and moved it to the relay header.
2308 - Implemented end-to-end integrity checking for the payloads of
2310 - Separated streamid from 'recognized' (otherwise circuits will get
2311 messed up when we try to have streams exit from the middle). We
2312 use the integrity-checking to confirm that a cell is addressed to
2314 - Randomize the initial circid and streamid values, so an adversary who
2315 breaks into a node can't learn how many circuits or streams have
2319 Changes in version 0.0.2pre16 - 2003-12-14
2321 - Fixed a bug that made HUP trigger an assert
2322 - Fixed a bug where a circuit that immediately failed wasn't being
2323 counted as a failed circuit in counting retries.
2326 - Now we close the circuit when we get a truncated cell: otherwise we're
2327 open to an anonymity attack where a bad node in the path truncates
2328 the circuit and then we open streams at him.
2329 - Add port ranges to exit policies
2330 - Add a conservative default exit policy
2331 - Warn if you're running tor as root
2332 - on HUP, retry OR connections and close/rebind listeners
2333 - options.EntryNodes: try these nodes first when picking the first node
2334 - options.ExitNodes: if your best choices happen to include any of
2335 your preferred exit nodes, you choose among just those preferred
2337 - options.ExcludedNodes: nodes that are never picked in path building
2340 Changes in version 0.0.2pre15 - 2003-12-03
2341 o Robustness and bugfixes:
2342 - Sometimes clients would cache incorrect DNS resolves, which would
2343 really screw things up.
2344 - An OP that goes offline would slowly leak all its sockets and stop
2346 - A wide variety of bugfixes in exit node selection, exit policy
2347 handling, and processing pending streams when a new circuit is
2349 - Pick nodes for a path only from those the directory says are up
2350 - Choose randomly from all running dirservers, not always the first one
2351 - Increase allowed http header size for directory fetch.
2352 - Stop writing to stderr (if we're daemonized it will be closed).
2353 - Enable -g always, so cores will be more useful to me.
2354 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2357 - Wrote a man page. It lists commonly used options.
2360 - Change default loglevel to warn.
2361 - Make PidFile default to null rather than littering in your CWD.
2362 - OnionRouter config option is now obsolete. Instead it just checks
2364 - Moved to a single unified torrc file for both clients and servers.
2367 Changes in version 0.0.2pre14 - 2003-11-29
2368 o Robustness and bugfixes:
2369 - Force the admin to make the DataDirectory himself
2370 - to get ownership/permissions right
2371 - so clients no longer make a DataDirectory and then never use it
2372 - fix bug where a client who was offline for 45 minutes would never
2373 pull down a directory again
2374 - fix (or at least hide really well) the dns assert bug that was
2375 causing server crashes
2376 - warnings and improved robustness wrt clockskew for certs
2377 - use the native daemon(3) to daemonize, when available
2378 - exit if bind() fails
2379 - exit if neither socksport nor orport is defined
2380 - include our own tor_timegm (Win32 doesn't have its own)
2381 - bugfix for win32 with lots of connections
2382 - fix minor bias in PRNG
2383 - make dirserver more robust to corrupt cached directory
2386 - Wrote the design document (woo)
2388 o Circuit building and exit policies:
2389 - Circuits no longer try to use nodes that the directory has told them
2391 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2392 bitcounts (18.0.0.0/8).
2393 - Make AP connections standby for a circuit if no suitable circuit
2394 exists, rather than failing
2395 - Circuits choose exit node based on addr/port, exit policies, and
2396 which AP connections are standing by
2397 - Bump min pathlen from 2 to 3
2398 - Relay end cells have a payload to describe why the stream ended.
2399 - If the stream failed because of exit policy, try again with a new
2401 - Clients have a dns cache to remember resolved addresses.
2402 - Notice more quickly when we have no working circuits
2405 - APPort is now called SocksPort
2406 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2408 - RecommendedVersions is now a config variable rather than
2409 hardcoded (for dirservers)
2410 - Reloads config on HUP
2411 - Usage info on -h or --help
2412 - If you set User and Group config vars, it'll setu/gid to them.
2414 Changes in version 0.0.2pre13 - 2003-10-19
2415 o General stability:
2416 - SSL_write no longer fails when it returns WANTWRITE and the number
2417 of bytes in the buf has changed by the next SSL_write call.
2418 - Fix segfault fetching directory when network is down
2419 - Fix a variety of minor memory leaks
2420 - Dirservers reload the fingerprints file on HUP, so I don't have
2421 to take down the network when I approve a new router
2422 - Default server config file has explicit Address line to specify fqdn
2425 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2426 - Make listener connections not ever alloc bufs
2428 o Autoconf improvements:
2429 - don't clobber an external CFLAGS in ./configure
2430 - Make install now works
2431 - create var/lib/tor on make install
2432 - autocreate a tor.sh initscript to help distribs
2433 - autocreate the torrc and sample-server-torrc with correct paths
2435 o Log files and Daemonizing now work:
2436 - If --DebugLogFile is specified, log to it at -l debug
2437 - If --LogFile is specified, use it instead of commandline
2438 - If --RunAsDaemon is set, tor forks and backgrounds on startup