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().
58 - Reject (most) attempts to use Tor as a one-hop proxy; if many people
59 start using Tor as a one-hop proxy, exit nodes become a more attractive
60 target for compromise. (Fixes bug 303.)
63 - Avoiding crashing on race condition in dns.c:
64 tor_assert(! resolve->expire)
65 - When a client asks the server to resolve (not connect to)
66 an address, and it has a cached answer, give them the cached answer.
67 Previously, the server would give them no answer at all.
70 - Two small performance improvements on parsing descriptors.
71 - Fix big bug affecting performance for both serving and reaching
73 - Major performance improvement on inserting descriptors: change
74 algorithm from O(n^2) to O(n).
75 - Make the common memory allocation path faster on machines where
76 malloc(0) returns a pointer.
77 - Fix a debug log message in eventdns to say "X resolved to Y"
78 instead of "X resolved to X".
79 - Prevent the contrib/exitlist script from printing the same
80 result more than once.
81 - Resume building on non-gcc compilers and ancient gcc. Resume
82 building with the -O0 compile flag. Resume building cleanly on
84 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
85 - Improve Tor's chances of building and running on Cygwin again.
86 - If we're a directory mirror and we ask for "all" network status
87 documents, we would discard status documents from authorities
89 - Avoid a memory corruption bug when creating a hash table for the first
91 - Track unreachable entry guards correctly: don't conflate 'unreachable
92 by us right now' with 'listed as down by the directory authorities'.
93 With the old code, if a guard was unreachable by us but listed as
94 running, it would clog our guard list forever.
95 - Make eventdns give strings for DNS errors, not just error numbers.
98 - Documented (and renamed) ServerDNSSearchDomains and
99 ServerDNSResolvConfFile options.
103 - Patches so Tor builds with MinGW on Windows.
104 - The Debian package now uses --verify-config when (re)starting,
105 to distinguish configuration errors from other errors.
106 - Update rpms to require libevent 1.1b.
107 - Remove architecture from OS X builds. The official builds are
108 now universal binaries.
110 - Make eventdns on-by-default.
111 - Divide eventdns log messages into warn and info messages.
112 - Add new config option "ResolvConf" to let the server operator
113 choose an alternate resolve.conf file.
115 - Allow really slow clients to not hang up five minutes into their
116 directory downloads (suggested by Adam J. Richter).
117 - Apply patch from Adam Langley: fix assert() in eventdns.c.
118 - Finally fix the openssl warnings with newer gccs that believe that
119 ignoring a return value is okay, but casting a return value and
120 then ignoring it is a sign of madness.
121 - Don't crash when the controller receives a third argument to an
122 "extendcircuit" request.
123 - Add a "getinfo address" controller command.
124 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
125 response; fix error code when "getinfo dir/status/" fails.
126 - Start remembering X-Your-Address-Is directory hints even if you're
127 a client, so you can become a server more smoothly.
128 - Avoid crash when telling controller stream-status and a stream
130 - Avoid crashing when we mmap a router cache file of size 0.
131 - Avoid duplicate entries on MyFamily line in server descriptor.
132 - Patch from Steve Hildrey: Generate network status correctly on
133 non-versioning dirservers.
134 - Send out a burst of long-range drop cells after we've established
135 that we're reachable. Spread them over 4 circuits, so hopefully
136 a few will be fast. This exercises our bandwidth and bootstraps
138 - Remove 8888 as a long lived port, and add 6697 (ircs).
139 - If we fail to build a circuit to an intended enclave, and it's
140 not mandatory that we use that enclave, stop wanting it.
145 Changes in version 0.1.2.1-alpha - 2006-08-27
147 - Add "eventdns" async dns library from Adam Langley, tweaked to
148 build on OSX and Windows. Only enabled if you pass the
149 --enable-eventdns argument to configure.
150 - Allow servers with no hostname or IP address to learn their
151 IP address by asking the directory authorities. This code only
152 kicks in when you would normally have exited with a "no address"
153 error. Nothing's authenticated, so use with care.
154 - Rather than waiting a fixed amount of time between retrying
155 application connections, we wait only 5 seconds for the first,
156 10 seconds for the second, and 15 seconds for each retry after
157 that. Hopefully this will improve the expected user experience.
158 - Patch from Tup to add support for transparent AP connections:
159 this basically bundles the functionality of trans-proxy-tor
160 into the Tor mainline. Now hosts with compliant pf/netfilter
161 implementations can redirect TCP connections straight to Tor
162 without diverting through SOCKS. Needs docs.
163 - Busy directory servers save lots of memory by spooling server
164 descriptors, v1 directories, and v2 networkstatus docs to buffers
165 as needed rather than en masse. Also mmap the cached-routers
166 files, so we don't need to keep the whole thing in memory too.
167 - Automatically avoid picking more than one node from the same
168 /16 network when constructing a circuit.
169 - Revise and clean up the torrc.sample that we ship with; add
170 a section for BandwidthRate and BandwidthBurst.
173 - Split circuit_t into origin_circuit_t and or_circuit_t, and
174 split connection_t into edge, or, dir, control, and base structs.
175 These will save quite a bit of memory on busy servers, and they'll
176 also help us track down bugs in the code and bugs in the spec.
177 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
178 or later. Log when we are doing this, so we can diagnose it when
179 it fails. (Also, recommend libevent 1.1b for kqueue and
180 win32 methods; deprecate libevent 1.0b harder; make libevent
181 recommendation system saner.)
182 - Start being able to build universal binaries on OS X (thanks
184 - Export the default exit policy via the control port, so controllers
185 don't need to guess what it is / will be later.
186 - Add a man page entry for ProtocolWarnings.
187 - Add TestVia config option to the man page.
188 - Remove even more protocol-related warnings from Tor server logs,
189 such as bad TLS handshakes and malformed begin cells.
190 - Stop fetching descriptors if you're not a dir mirror and you
191 haven't tried to establish any circuits lately. [This currently
192 causes some dangerous behavior, because when you start up again
193 you'll use your ancient server descriptors.]
194 - New DirPort behavior: if you have your dirport set, you download
195 descriptors aggressively like a directory mirror, whether or not
197 - Get rid of the router_retry_connections notion. Now routers
198 no longer try to rebuild long-term connections to directory
199 authorities, and directory authorities no longer try to rebuild
200 long-term connections to all servers. We still don't hang up
201 connections in these two cases though -- we need to look at it
202 more carefully to avoid flapping, and we likely need to wait til
204 - Drop compatibility with obsolete Tors that permit create cells
205 to have the wrong circ_id_type.
206 - Re-enable per-connection rate limiting. Get rid of the "OP
207 bandwidth" concept. Lay groundwork for "bandwidth classes" --
208 separate global buckets that apply depending on what sort of conn
210 - Start publishing one minute or so after we find our ORPort
211 to be reachable. This will help reduce the number of descriptors
212 we have for ourselves floating around, since it's quite likely
213 other things (e.g. DirPort) will change during that minute too.
214 - Fork the v1 directory protocol into its own spec document,
215 and mark dir-spec.txt as the currently correct (v2) spec.
218 - When we find our DirPort to be reachable, publish a new descriptor
219 so we'll tell the world (reported by pnx).
220 - Publish a new descriptor after we hup/reload. This is important
221 if our config has changed such that we'll want to start advertising
222 our DirPort now, etc.
223 - Allow Tor to start when RunAsDaemon is set but no logs are set.
224 - When we have a state file we cannot parse, tell the user and
225 move it aside. Now we avoid situations where the user starts
226 Tor in 1904, Tor writes a state file with that timestamp in it,
227 the user fixes her clock, and Tor refuses to start.
228 - Fix configure.in to not produce broken configure files with
229 more recent versions of autoconf. Thanks to Clint for his auto*
231 - "tor --verify-config" now exits with -1(255) or 0 depending on
232 whether the config options are bad or good.
233 - Resolve bug 321 when using dnsworkers: append a period to every
234 address we resolve at the exit node, so that we do not accidentally
235 pick up local addresses, and so that failing searches are retried
236 in the resolver search domains. (This is already solved for
237 eventdns.) (This breaks Blossom servers for now.)
238 - If we are using an exit enclave and we can't connect, e.g. because
239 its webserver is misconfigured to not listen on localhost, then
240 back off and try connecting from somewhere else before we fail.
243 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
244 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
245 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
246 when the IP address is mapped through MapAddress to a hostname.
247 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
248 useless IPv6 DNS resolves.
249 - Patch suggested by Karsten Loesing: respond to SIGNAL command
250 before we execute the signal, in case the signal shuts us down.
251 - Clean up AllowInvalidNodes man page entry.
252 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
253 - Add more asserts to track down an assert error on a windows Tor
254 server with connection_add being called with socket == -1.
255 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
256 - Fix misleading log messages: an entry guard that is "unlisted",
257 as well as not known to be "down" (because we've never heard
258 of it), is not therefore "up".
259 - Remove code to special-case "-cvs" ending, since it has not
260 actually mattered since 0.0.9.
261 - Make our socks5 handling more robust to broken socks clients:
262 throw out everything waiting on the buffer in between socks
263 handshake phases, since they can't possibly (so the theory
264 goes) have predicted what we plan to respond to them.
267 Changes in version 0.1.1.23 - 2006-07-30
269 - Fast Tor servers, especially exit nodes, were triggering asserts
270 due to a bug in handling the list of pending DNS resolves. Some
271 bugs still remain here; we're hunting them.
272 - Entry guards could crash clients by sending unexpected input.
273 - More fixes on reachability testing: if you find yourself reachable,
274 then don't ever make any client requests (so you stop predicting
275 circuits), then hup or have your clock jump, then later your IP
276 changes, you won't think circuits are working, so you won't try to
277 test reachability, so you won't publish.
280 - Avoid a crash if the controller does a resetconf firewallports
281 and then a setconf fascistfirewall=1.
282 - Avoid an integer underflow when the dir authority decides whether
283 a router is stable: we might wrongly label it stable, and compute
284 a slightly wrong median stability, when a descriptor is published
286 - Fix a place where we might trigger an assert if we can't build our
287 own server descriptor yet.
290 Changes in version 0.1.1.22 - 2006-07-05
292 - Fix a big bug that was causing servers to not find themselves
293 reachable if they changed IP addresses. Since only 0.1.1.22+
294 servers can do reachability testing correctly, now we automatically
295 make sure to test via one of these.
296 - Fix to allow clients and mirrors to learn directory info from
297 descriptor downloads that get cut off partway through.
298 - Directory authorities had a bug in deciding if a newly published
299 descriptor was novel enough to make everybody want a copy -- a few
300 servers seem to be publishing new descriptors many times a minute.
302 - Fix a rare bug that was causing some servers to complain about
303 "closing wedged cpuworkers" and skip some circuit create requests.
304 - Make the Exit flag in directory status documents actually work.
307 Changes in version 0.1.1.21 - 2006-06-10
308 o Crash and assert fixes from 0.1.1.20:
309 - Fix a rare crash on Tor servers that have enabled hibernation.
310 - Fix a seg fault on startup for Tor networks that use only one
312 - Fix an assert from a race condition that occurs on Tor servers
313 while exiting, where various threads are trying to log that they're
314 exiting, and delete the logs, at the same time.
315 - Make our unit tests pass again on certain obscure platforms.
318 - Add support for building SUSE RPM packages.
319 - Speed up initial bootstrapping for clients: if we are making our
320 first ever connection to any entry guard, then don't mark it down
322 - When only one Tor server in the network is labelled as a guard,
323 and we've already picked him, we would cycle endlessly picking him
324 again, being unhappy about it, etc. Now we specifically exclude
325 current guards when picking a new guard.
326 - Servers send create cells more reliably after the TLS connection
327 is established: we were sometimes forgetting to send half of them
328 when we had more than one pending.
329 - If we get a create cell that asks us to extend somewhere, but the
330 Tor server there doesn't match the expected digest, we now send
331 a destroy cell back, rather than silently doing nothing.
332 - Make options->RedirectExit work again.
333 - Make cookie authentication for the controller work again.
334 - Stop being picky about unusual characters in the arguments to
335 mapaddress. It's none of our business.
336 - Add a new config option "TestVia" that lets you specify preferred
337 middle hops to use for test circuits. Perhaps this will let me
338 debug the reachability problems better.
340 o Log / documentation fixes:
341 - If we're a server and some peer has a broken TLS certificate, don't
342 log about it unless ProtocolWarnings is set, i.e., we want to hear
343 about protocol violations by others.
344 - Fix spelling of VirtualAddrNetwork in man page.
345 - Add a better explanation at the top of the autogenerated torrc file
346 about what happened to our old torrc.
349 Changes in version 0.1.1.20 - 2006-05-23
350 o Crash and assert fixes from 0.1.0.17:
351 - Fix assert bug in close_logs() on exit: when we close and delete
352 logs, remove them all from the global "logfiles" list.
353 - Fix an assert error when we're out of space in the connection_list
354 and we try to post a hidden service descriptor (reported by Peter
356 - Fix a rare assert error when we've tried all intro points for
357 a hidden service and we try fetching the service descriptor again:
358 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed".
359 - Setconf SocksListenAddress kills Tor if it fails to bind. Now back
360 out and refuse the setconf if it would fail.
361 - If you specify a relative torrc path and you set RunAsDaemon in
362 your torrc, then it chdir()'s to the new directory. If you then
363 HUP, it tries to load the new torrc location, fails, and exits.
364 The fix: no longer allow a relative path to torrc when using -f.
365 - Check for integer overflows in more places, when adding elements
366 to smartlists. This could possibly prevent a buffer overflow
367 on malicious huge inputs.
369 o Security fixes, major:
370 - When we're printing strings from the network, don't try to print
371 non-printable characters. Now we're safer against shell escape
372 sequence exploits, and also against attacks to fool users into
373 misreading their logs.
374 - Implement entry guards: automatically choose a handful of entry
375 nodes and stick with them for all circuits. Only pick new guards
376 when the ones you have are unsuitable, and if the old guards
377 become suitable again, switch back. This will increase security
378 dramatically against certain end-point attacks. The EntryNodes
379 config option now provides some hints about which entry guards you
380 want to use most; and StrictEntryNodes means to only use those.
382 - Implement exit enclaves: if we know an IP address for the
383 destination, and there's a running Tor server at that address
384 which allows exit to the destination, then extend the circuit to
385 that exit first. This provides end-to-end encryption and end-to-end
386 authentication. Also, if the user wants a .exit address or enclave,
387 use 4 hops rather than 3, and cannibalize a general circ for it
389 - Obey our firewall options more faithfully:
390 . If we can't get to a dirserver directly, try going via Tor.
391 . Don't ever try to connect (as a client) to a place our
392 firewall options forbid.
393 . If we specify a proxy and also firewall options, obey the
394 firewall options even when we're using the proxy: some proxies
395 can only proxy to certain destinations.
396 - Make clients regenerate their keys when their IP address changes.
397 - For the OS X package's modified privoxy config file, comment
398 out the "logfile" line so we don't log everything passed
400 - Our TLS handshakes were generating a single public/private
401 keypair for the TLS context, rather than making a new one for
402 each new connection. Oops. (But we were still rotating them
403 periodically, so it's not so bad.)
404 - When we were cannibalizing a circuit with a particular exit
405 node in mind, we weren't checking to see if that exit node was
406 already present earlier in the circuit. Now we are.
407 - Require server descriptors to list IPv4 addresses -- hostnames
408 are no longer allowed. This also fixes potential vulnerabilities
409 to servers providing hostnames as their address and then
410 preferentially resolving them so they can partition users.
411 - Our logic to decide if the OR we connected to was the right guy
412 was brittle and maybe open to a mitm for invalid routers.
414 o Security fixes, minor:
415 - Adjust tor-spec.txt to parameterize cell and key lengths. Now
416 Ian Goldberg can prove things about our handshake protocol more
418 - Make directory authorities generate a separate "guard" flag to
419 mean "would make a good entry guard". Clients now honor the
420 is_guard flag rather than looking at is_fast or is_stable.
421 - Try to list MyFamily elements by key, not by nickname, and warn
422 if we've not heard of a server.
423 - Start using RAND_bytes rather than RAND_pseudo_bytes from
424 OpenSSL. Also, reseed our entropy every hour, not just at
425 startup. And add entropy in 512-bit chunks, not 160-bit chunks.
426 - Refuse server descriptors where the fingerprint line doesn't match
427 the included identity key. Tor doesn't care, but other apps (and
428 humans) might actually be trusting the fingerprint line.
429 - We used to kill the circuit when we receive a relay command we
430 don't recognize. Now we just drop that cell.
431 - Fix a bug found by Lasse Overlier: when we were making internal
432 circuits (intended to be cannibalized later for rendezvous and
433 introduction circuits), we were picking them so that they had
434 useful exit nodes. There was no need for this, and it actually
435 aids some statistical attacks.
436 - Start treating internal circuits and exit circuits separately.
437 It's important to keep them separate because internal circuits
438 have their last hops picked like middle hops, rather than like
439 exit hops. So exiting on them will break the user's expectations.
440 - Fix a possible way to DoS dirservers.
441 - When the client asked for a rendezvous port that the hidden
442 service didn't want to provide, we were sending an IP address
443 back along with the end cell. Fortunately, it was zero. But stop
446 o Packaging improvements:
447 - Implement --with-libevent-dir option to ./configure. Improve
448 search techniques to find libevent, and use those for openssl too.
449 - Fix a couple of bugs in OpenSSL detection. Deal better when
450 there are multiple SSLs installed with different versions.
451 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
452 - On non-gcc compilers (e.g. Solaris's cc), use "-g -O" instead of
454 - Make unit tests (and other invocations that aren't the real Tor)
455 run without launching listeners, creating subdirectories, and so on.
456 - The OS X installer was adding a symlink for tor_resolve but
457 the binary was called tor-resolve (reported by Thomas Hardly).
458 - Now we can target arch and OS in rpm builds (contributed by
459 Phobos). Also make the resulting dist-rpm filename match the
461 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
462 if you log to syslog and want something other than LOG_DAEMON.
463 - Fix the torify (tsocks) config file to not use Tor for localhost
465 - Start shipping socks-extensions.txt, tor-doc-unix.html,
466 tor-doc-server.html, and stylesheet.css in the tarball.
467 - Stop shipping tor-doc.html, INSTALL, and README in the tarball.
468 They are useless now.
469 - Add Peter Palfrader's contributed check-tor script. It lets you
470 easily check whether a given server (referenced by nickname)
472 - Add BSD-style contributed startup script "rc.subr" from Peter
475 o Directory improvements -- new directory protocol:
476 - See tor/doc/dir-spec.txt for all the juicy details. Key points:
477 - Authorities and caches publish individual descriptors (by
478 digest, by fingerprint, by "all", and by "tell me yours").
479 - Clients don't download or use the old directory anymore. Now they
480 download network-statuses from the directory authorities, and
481 fetch individual server descriptors as needed from mirrors.
482 - Clients don't download descriptors of non-running servers.
483 - Download descriptors by digest, not by fingerprint. Caches try to
484 download all listed digests from authorities; clients try to
485 download "best" digests from caches. This avoids partitioning
486 and isolating attacks better.
487 - Only upload a new server descriptor when options change, 18
488 hours have passed, uptime is reset, or bandwidth changes a lot.
489 - Directory authorities silently throw away new descriptors that
490 haven't changed much if the timestamps are similar. We do this to
491 tolerate older Tor servers that upload a new descriptor every 15
492 minutes. (It seemed like a good idea at the time.)
493 - Clients choose directory servers from the network status lists,
494 not from their internal list of router descriptors. Now they can
495 go to caches directly rather than needing to go to authorities
496 to bootstrap the first set of descriptors.
497 - When picking a random directory, prefer non-authorities if any
499 - Add a new flag to network-status indicating whether the server
500 can answer v2 directory requests too.
501 - Directory mirrors now cache up to 16 unrecognized network-status
502 docs, so new directory authorities will be cached too.
503 - Stop parsing, storing, or using running-routers output (but
504 mirrors still cache and serve it).
505 - Clients consider a threshold of "versioning" directory authorities
506 before deciding whether to warn the user that he's obsolete.
507 - Authorities publish separate sorted lists of recommended versions
508 for clients and for servers.
509 - Change DirServers config line to note which dirs are v1 authorities.
510 - Put nicknames on the DirServer line, so we can refer to them
511 without requiring all our users to memorize their IP addresses.
512 - Remove option when getting directory cache to see whether they
513 support running-routers; they all do now. Replace it with one
514 to see whether caches support v2 stuff.
515 - Stop listing down or invalid nodes in the v1 directory. This
516 reduces its bulk by about 1/3, and reduces load on mirrors.
517 - Mirrors no longer cache the v1 directory as often.
518 - If we as a directory mirror don't know of any v1 directory
519 authorities, then don't try to cache any v1 directories.
521 o Other directory improvements:
522 - Add lefkada.eecs.harvard.edu and tor.dizum.com as fourth and
523 fifth authoritative directory servers.
524 - Directory authorities no longer require an open connection from
525 a server to consider him "reachable". We need this change because
526 when we add new directory authorities, old servers won't know not
528 - Dir authorities now do their own external reachability testing
529 of each server, and only list as running the ones they found to
530 be reachable. We also send back warnings to the server's logs if
531 it uploads a descriptor that we already believe is unreachable.
532 - Spread the directory authorities' reachability testing over the
533 entire testing interval, so we don't try to do 500 TLS's at once
535 - Make the "stable" router flag in network-status be the median of
536 the uptimes of running valid servers, and make clients pay
537 attention to the network-status flags. Thus the cutoff adapts
538 to the stability of the network as a whole, making IRC, IM, etc
539 connections more reliable.
540 - Make the v2 dir's "Fast" flag based on relative capacity, just
541 like "Stable" is based on median uptime. Name everything in the
542 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
543 - Retry directory requests if we fail to get an answer we like
544 from a given dirserver (we were retrying before, but only if
546 - Return a robots.txt on our dirport to discourage google indexing.
548 o Controller protocol improvements:
549 - Revised controller protocol (version 1) that uses ascii rather
550 than binary: tor/doc/control-spec.txt. Add supporting libraries
551 in python and java and c# so you can use the controller from your
552 applications without caring how our protocol works.
553 - Allow the DEBUG controller event to work again. Mark certain log
554 entries as "don't tell this to controllers", so we avoid cycles.
555 - New controller function "getinfo accounting", to ask how
556 many bytes we've used in this time period.
557 - Add a "resetconf" command so you can set config options like
558 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
559 a config option in the torrc with no value, then it clears it
560 entirely (rather than setting it to its default).
561 - Add a "getinfo config-file" to tell us where torrc is. Also
562 expose guard nodes, config options/names.
563 - Add a "quit" command (when when using the controller manually).
564 - Add a new signal "newnym" to "change pseudonyms" -- that is, to
565 stop using any currently-dirty circuits for new streams, so we
566 don't link new actions to old actions. This also occurs on HUP
568 - If we would close a stream early (e.g. it asks for a .exit that
569 we know would refuse it) but the LeaveStreamsUnattached config
570 option is set by the controller, then don't close it.
571 - Add a new controller event type "authdir_newdescs" that allows
572 controllers to get all server descriptors that were uploaded to
573 a router in its role as directory authority.
574 - New controller option "getinfo desc/all-recent" to fetch the
575 latest server descriptor for every router that Tor knows about.
576 - Fix the controller's "attachstream 0" command to treat conn like
577 it just connected, doing address remapping, handling .exit and
578 .onion idioms, and so on. Now we're more uniform in making sure
579 that the controller hears about new and closing connections.
580 - Permit transitioning from ORPort==0 to ORPort!=0, and back, from
581 the controller. Also, rotate dns and cpu workers if the controller
582 changes options that will affect them; and initialize the dns
583 worker cache tree whether or not we start out as a server.
584 - Add a new circuit purpose 'controller' to let the controller ask
585 for a circuit that Tor won't try to use. Extend the "extendcircuit"
586 controller command to let you specify the purpose if you're starting
587 a new circuit. Add a new "setcircuitpurpose" controller command to
588 let you change a circuit's purpose after it's been created.
589 - Let the controller ask for "getinfo dir/server/foo" so it can ask
590 directly rather than connecting to the dir port. "getinfo
591 dir/status/foo" also works, but currently only if your DirPort
593 - Let the controller tell us about certain router descriptors
594 that it doesn't want Tor to use in circuits. Implement
595 "setrouterpurpose" and modify "+postdescriptor" to do this.
596 - If the controller's *setconf commands fail, collect an error
597 message in a string and hand it back to the controller -- don't
598 just tell them to go read their logs.
600 o Scalability, resource management, and performance:
601 - Fix a major load balance bug: we were round-robin reading in 16 KB
602 chunks, and servers with bandwidthrate of 20 KB, while downloading
603 a 600 KB directory, would starve their other connections. Now we
604 try to be a bit more fair.
605 - Be more conservative about whether to advertise our DirPort.
606 The main change is to not advertise if we're running at capacity
607 and either a) we could hibernate ever or b) our capacity is low
608 and we're using a default DirPort.
609 - We weren't cannibalizing circuits correctly for
610 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
611 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
612 build those from scratch. This should make hidden services faster.
613 - Predict required circuits better, with an eye toward making hidden
614 services faster on the service end.
615 - Compress exit policies even more: look for duplicate lines and
617 - Generate 18.0.0.0/8 address policy format in descs when we can;
618 warn when the mask is not reducible to a bit-prefix.
619 - There used to be two ways to specify your listening ports in a
620 server descriptor: on the "router" line and with a separate "ports"
621 line. Remove support for the "ports" line.
622 - Reduce memory requirements in our structs by changing the order
623 of fields. Replace balanced trees with hash tables. Inline
624 bottleneck smartlist functions. Add a "Map from digest to void*"
625 abstraction so we can do less hex encoding/decoding, and use it
626 in router_get_by_digest(). Many other CPU and memory improvements.
627 - Allow tor_gzip_uncompress to extract as much as possible from
628 truncated compressed data. Try to extract as many
629 descriptors as possible from truncated http responses (when
630 purpose is DIR_PURPOSE_FETCH_ROUTERDESC).
631 - Make circ->onionskin a pointer, not a static array. moria2 was using
632 125000 circuit_t's after it had been up for a few weeks, which
633 translates to 20+ megs of wasted space.
634 - The private half of our EDH handshake keys are now chosen out
635 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
636 - Stop doing the complex voodoo overkill checking for insecure
637 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
638 - Do round-robin writes for TLS of at most 16 kB per write. This
639 might be more fair on loaded Tor servers.
640 - Do not use unaligned memory access on alpha, mips, or mipsel.
641 It *works*, but is very slow, so we treat them as if it doesn't.
643 o Other bugfixes and improvements:
644 - Start storing useful information to $DATADIR/state, so we can
645 remember things across invocations of Tor. Retain unrecognized
646 lines so we can be forward-compatible, and write a TorVersion line
647 so we can be backward-compatible.
648 - If ORPort is set, Address is not explicitly set, and our hostname
649 resolves to a private IP address, try to use an interface address
650 if it has a public address. Now Windows machines that think of
651 themselves as localhost can guess their address.
652 - Regenerate our local descriptor if it's dirty and we try to use
653 it locally (e.g. if it changes during reachability detection).
654 This was causing some Tor servers to keep publishing the same
655 initial descriptor forever.
656 - Tor servers with dynamic IP addresses were needing to wait 18
657 hours before they could start doing reachability testing using
658 the new IP address and ports. This is because they were using
659 the internal descriptor to learn what to test, yet they were only
660 rebuilding the descriptor once they decided they were reachable.
661 - It turns out we couldn't bootstrap a network since we added
662 reachability detection in 0.1.0.1-rc. Good thing the Tor network
663 has never gone down. Add an AssumeReachable config option to let
664 servers and authorities bootstrap. When we're trying to build a
665 high-uptime or high-bandwidth circuit but there aren't enough
666 suitable servers, try being less picky rather than simply failing.
667 - Newly bootstrapped Tor networks couldn't establish hidden service
668 circuits until they had nodes with high uptime. Be more tolerant.
669 - Really busy servers were keeping enough circuits open on stable
670 connections that they were wrapping around the circuit_id
671 space. (It's only two bytes.) This exposed a bug where we would
672 feel free to reuse a circuit_id even if it still exists but has
673 been marked for close. Try to fix this bug. Some bug remains.
674 - When we fail to bind or listen on an incoming or outgoing
675 socket, we now close it before refusing, rather than just
676 leaking it. (Thanks to Peter Palfrader for finding.)
677 - Fix a file descriptor leak in start_daemon().
678 - On Windows, you can't always reopen a port right after you've
679 closed it. So change retry_listeners() to only close and re-open
680 ports that have changed.
681 - Workaround a problem with some http proxies that refuse GET
682 requests that specify "Content-Length: 0". Reported by Adrian.
683 - Recover better from TCP connections to Tor servers that are
684 broken but don't tell you (it happens!); and rotate TLS
685 connections once a week.
686 - Fix a scary-looking but apparently harmless bug where circuits
687 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
688 servers, and never switch to state CIRCUIT_STATE_OPEN.
689 - Check for even more Windows version flags when writing the platform
690 string in server descriptors, and note any we don't recognize.
691 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
692 get a better idea of why their circuits failed. Not used yet.
693 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
694 We don't use them yet, but maybe one day our DNS resolver will be
695 able to discover them.
696 - Let people type "tor --install" as well as "tor -install" when they
697 want to make it an NT service.
698 - Looks like we were never delivering deflated (i.e. compressed)
699 running-routers lists, even when asked. Oops.
700 - We were leaking some memory every time the client changed IPs.
701 - Clean up more of the OpenSSL memory when exiting, so we can detect
703 - Never call free() on tor_malloc()d memory. This will help us
704 use dmalloc to detect memory leaks.
705 - Some Tor servers process billions of cells per day. These
706 statistics are now uint64_t's.
707 - Check [X-]Forwarded-For headers in HTTP requests when generating
708 log messages. This lets people run dirservers (and caches) behind
709 Apache but still know which IP addresses are causing warnings.
710 - Fix minor integer overflow in calculating when we expect to use up
711 our bandwidth allocation before hibernating.
712 - Lower the minimum required number of file descriptors to 1000,
713 so we can have some overhead for Valgrind on Linux, where the
714 default ulimit -n is 1024.
715 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
716 and its existence is confusing some users.
718 o Config option fixes:
719 - Add a new config option ExitPolicyRejectPrivate which defaults
720 to on. Now all exit policies will begin with rejecting private
721 addresses, unless the server operator explicitly turns it off.
722 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB.
723 - Add new ReachableORAddresses and ReachableDirAddresses options
724 that understand address policies. FascistFirewall is now a synonym
725 for "ReachableORAddresses *:443", "ReachableDirAddresses *:80".
726 - Start calling it FooListenAddress rather than FooBindAddress,
727 since few of our users know what it means to bind an address
729 - If the user gave Tor an odd number of command-line arguments,
730 we were silently ignoring the last one. Now we complain and fail.
731 This wins the oldest-bug prize -- this bug has been present since
732 November 2002, as released in Tor 0.0.0.
733 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
734 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
735 it would silently ignore the 6668.
736 - If we get a linelist or linelist_s config option from the torrc,
737 e.g. ExitPolicy, and it has no value, warn and skip rather than
738 silently resetting it to its default.
739 - Setconf was appending items to linelists, not clearing them.
740 - Add MyFamily to torrc.sample in the server section, so operators
741 will be more likely to learn that it exists.
742 - Make ContactInfo mandatory for authoritative directory servers.
743 - MaxConn has been obsolete for a while now. Document the ConnLimit
744 config option, which is a *minimum* number of file descriptors
745 that must be available else Tor refuses to start.
746 - Get rid of IgnoreVersion undocumented config option, and make us
747 only warn, never exit, when we're running an obsolete version.
748 - Make MonthlyAccountingStart config option truly obsolete now.
749 - Correct the man page entry on TrackHostExitsExpire.
750 - Let directory authorities start even if they don't specify an
751 Address config option.
752 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
753 reflect the updated flags in our v2 dir protocol.
755 o Config option features:
756 - Add a new config option FastFirstHopPK (on by default) so clients
757 do a trivial crypto handshake for their first hop, since TLS has
758 already taken care of confidentiality and authentication.
759 - Let the user set ControlListenAddress in the torrc. This can be
760 dangerous, but there are some cases (like a secured LAN) where it
762 - New config options to help controllers: FetchServerDescriptors
763 and FetchHidServDescriptors for whether to fetch server
764 info and hidserv info or let the controller do it, and
765 PublishServerDescriptor and PublishHidServDescriptors.
766 - Also let the controller set the __AllDirActionsPrivate config
767 option if you want all directory fetches/publishes to happen via
768 Tor (it assumes your controller bootstraps your circuits).
769 - Add "HardwareAccel" config option: support for crypto hardware
770 accelerators via OpenSSL. Off by default, until we find somebody
771 smart who can test it for us. (It appears to produce seg faults
772 in at least some cases.)
773 - New config option "AuthDirRejectUnlisted" for directory authorities
774 as a panic button: if we get flooded with unusable servers we can
775 revert to only listing servers in the approved-routers file.
776 - Directory authorities can now reject/invalidate by key and IP,
777 with the config options "AuthDirInvalid" and "AuthDirReject", or
778 by marking a fingerprint as "!reject" or "!invalid" (as its
779 nickname) in the approved-routers file. This is useful since
780 currently we automatically list servers as running and usable
781 even if we know they're jerks.
782 - Add a new config option TestSocks so people can see whether their
783 applications are using socks4, socks4a, socks5-with-ip, or
784 socks5-with-fqdn. This way they don't have to keep mucking
785 with tcpdump and wondering if something got cached somewhere.
786 - Add "private:*" as an alias in configuration for policies. Now
787 you can simplify your exit policy rather than needing to list
788 every single internal or nonroutable network space.
789 - Accept "private:*" in routerdesc exit policies; not generated yet
790 because older Tors do not understand it.
791 - Add configuration option "V1AuthoritativeDirectory 1" which
792 moria1, moria2, and tor26 have set.
793 - Implement an option, VirtualAddrMask, to set which addresses
794 get handed out in response to mapaddress requests. This works
795 around a bug in tsocks where 127.0.0.0/8 is never socksified.
796 - Add a new config option FetchUselessDescriptors, off by default,
797 for when you plan to run "exitlist" on your client and you want
798 to know about even the non-running descriptors.
799 - SocksTimeout: How long do we let a socks connection wait
800 unattached before we fail it?
801 - CircuitBuildTimeout: Cull non-open circuits that were born
802 at least this many seconds ago.
803 - CircuitIdleTimeout: Cull open clean circuits that were born
804 at least this many seconds ago.
805 - New config option SafeSocks to reject all application connections
806 using unsafe socks protocols. Defaults to off.
808 o Improved and clearer log messages:
809 - Reduce clutter in server logs. We're going to try to make
810 them actually usable now. New config option ProtocolWarnings that
811 lets you hear about how _other Tors_ are breaking the protocol. Off
813 - Divide log messages into logging domains. Once we put some sort
814 of interface on this, it will let people looking at more verbose
815 log levels specify the topics they want to hear more about.
816 - Log server fingerprint on startup, so new server operators don't
817 have to go hunting around their filesystem for it.
818 - Provide dire warnings to any users who set DirServer manually;
819 move it out of torrc.sample and into torrc.complete.
820 - Make the log message less scary when all the dirservers are
821 temporarily unreachable.
822 - When tor_socketpair() fails in Windows, give a reasonable
823 Windows-style errno back.
824 - Improve tor_gettimeofday() granularity on windows.
825 - We were printing the number of idle dns workers incorrectly when
827 - Handle duplicate lines in approved-routers files without warning.
828 - We were whining about using socks4 or socks5-with-local-lookup
829 even when it's an IP address in the "virtual" range we designed
830 exactly for this case.
831 - Check for named servers when looking them up by nickname;
832 warn when we're calling a non-named server by its nickname;
833 don't warn twice about the same name.
834 - Downgrade the dirserver log messages when whining about
836 - Correct "your server is reachable" log entries to indicate that
837 it was self-testing that told us so.
838 - If we're trying to be a Tor server and running Windows 95/98/ME
839 as a server, explain that we'll likely crash.
840 - Provide a more useful warn message when our onion queue gets full:
841 the CPU is too slow or the exit policy is too liberal.
842 - Don't warn when we receive a 503 from a dirserver/cache -- this
843 will pave the way for them being able to refuse if they're busy.
844 - When we fail to bind a listener, try to provide a more useful
845 log message: e.g., "Is Tor already running?"
846 - Only start testing reachability once we've established a
847 circuit. This will make startup on dir authorities less noisy.
848 - Don't try to upload hidden service descriptors until we have
849 established a circuit.
850 - Tor didn't warn when it failed to open a log file.
851 - Warn when listening on a public address for socks. We suspect a
852 lot of people are setting themselves up as open socks proxies,
853 and they have no idea that jerks on the Internet are using them,
854 since they simply proxy the traffic into the Tor network.
855 - Give a useful message when people run Tor as the wrong user,
856 rather than telling them to start chowning random directories.
857 - Fix a harmless bug that was causing Tor servers to log
858 "Got an end because of misc error, but we're not an AP. Closing."
859 - Fix wrong log message when you add a "HiddenServiceNodes" config
860 line without any HiddenServiceDir line (reported by Chris Thomas).
861 - Directory authorities now stop whining so loudly about bad
862 descriptors that they fetch from other dirservers. So when there's
863 a log complaint, it's for sure from a freshly uploaded descriptor.
864 - When logging via syslog, include the pid whenever we provide
865 a log entry. Suggested by Todd Fries.
866 - When we're shutting down and we do something like try to post a
867 server descriptor or rendezvous descriptor, don't complain that
868 we seem to be unreachable. Of course we are, we're shutting down.
869 - Change log line for unreachability to explicitly suggest /etc/hosts
870 as the culprit. Also make it clearer what IP address and ports we're
871 testing for reachability.
872 - Put quotes around user-supplied strings when logging so users are
873 more likely to realize if they add bad characters (like quotes)
875 - NT service patch from Matt Edman to improve error messages on Win32.
878 Changes in version 0.1.0.17 - 2006-02-17
879 o Crash bugfixes on 0.1.0.x:
880 - When servers with a non-zero DirPort came out of hibernation,
881 sometimes they would trigger an assert.
883 o Other important bugfixes:
884 - On platforms that don't have getrlimit (like Windows), we were
885 artificially constraining ourselves to a max of 1024
886 connections. Now just assume that we can handle as many as 15000
887 connections. Hopefully this won't cause other problems.
889 o Backported features:
890 - When we're a server, a client asks for an old-style directory,
891 and our write bucket is empty, don't give it to him. This way
892 small servers can continue to serve the directory *sometimes*,
893 without getting overloaded.
894 - Whenever you get a 503 in response to a directory fetch, try
895 once more. This will become important once servers start sending
896 503's whenever they feel busy.
897 - Fetch a new directory every 120 minutes, not every 40 minutes.
898 Now that we have hundreds of thousands of users running the old
899 directory algorithm, it's starting to hurt a lot.
900 - Bump up the period for forcing a hidden service descriptor upload
901 from 20 minutes to 1 hour.
904 Changes in version 0.1.0.16 - 2006-01-02
905 o Crash bugfixes on 0.1.0.x:
906 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
907 corrupting the heap, losing FDs, or crashing when we need to resize
908 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
909 - It turns out sparc64 platforms crash on unaligned memory access
910 too -- so detect and avoid this.
911 - Handle truncated compressed data correctly (by detecting it and
913 - Fix possible-but-unlikely free(NULL) in control.c.
914 - When we were closing connections, there was a rare case that
915 stomped on memory, triggering seg faults and asserts.
916 - Avoid potential infinite recursion when building a descriptor. (We
917 don't know that it ever happened, but better to fix it anyway.)
918 - We were neglecting to unlink marked circuits from soon-to-close OR
919 connections, which caused some rare scribbling on freed memory.
920 - Fix a memory stomping race bug when closing the joining point of two
922 - Fix an assert in time parsing found by Steven Murdoch.
924 o Other bugfixes on 0.1.0.x:
925 - When we're doing reachability testing, provide more useful log
926 messages so the operator knows what to expect.
927 - Do not check whether DirPort is reachable when we are suppressing
928 advertising it because of hibernation.
929 - When building with -static or on Solaris, we sometimes needed -ldl.
930 - One of the dirservers (tor26) changed its IP address.
931 - When we're deciding whether a stream has enough circuits around
932 that can handle it, count the freshly dirty ones and not the ones
933 that are so dirty they won't be able to handle it.
934 - When we're expiring old circuits, we had a logic error that caused
935 us to close new rendezvous circuits rather than old ones.
936 - Give a more helpful log message when you try to change ORPort via
937 the controller: you should upgrade Tor if you want that to work.
938 - We were failing to parse Tor versions that start with "Tor ".
939 - Tolerate faulty streams better: when a stream fails for reason
940 exitpolicy, stop assuming that the router is lying about his exit
941 policy. When a stream fails for reason misc, allow it to retry just
942 as if it was resolvefailed. When a stream has failed three times,
943 reset its failure count so we can try again and get all three tries.
946 Changes in version 0.1.0.15 - 2005-09-23
947 o Bugfixes on 0.1.0.x:
948 - Reject ports 465 and 587 (spam targets) in default exit policy.
949 - Don't crash when we don't have any spare file descriptors and we
950 try to spawn a dns or cpu worker.
951 - Get rid of IgnoreVersion undocumented config option, and make us
952 only warn, never exit, when we're running an obsolete version.
953 - Don't try to print a null string when your server finds itself to
954 be unreachable and the Address config option is empty.
955 - Make the numbers in read-history and write-history into uint64s,
956 so they don't overflow and publish negatives in the descriptor.
957 - Fix a minor memory leak in smartlist_string_remove().
958 - We were only allowing ourselves to upload a server descriptor at
959 most every 20 minutes, even if it changed earlier than that.
960 - Clean up log entries that pointed to old URLs.
963 Changes in version 0.1.0.14 - 2005-08-08
964 o Bugfixes on 0.1.0.x:
965 - Fix the other half of the bug with crypto handshakes
967 - Fix an assert trigger if you send a 'signal term' via the
968 controller when it's listening for 'event info' messages.
971 Changes in version 0.1.0.13 - 2005-08-04
972 o Bugfixes on 0.1.0.x:
973 - Fix a critical bug in the security of our crypto handshakes.
974 - Fix a size_t underflow in smartlist_join_strings2() that made
975 it do bad things when you hand it an empty smartlist.
976 - Fix Windows installer to ship Tor license (thanks to Aphex for
977 pointing out this oversight) and put a link to the doc directory
979 - Explicitly set no-unaligned-access for sparc: it turns out the
980 new gcc's let you compile broken code, but that doesn't make it
984 Changes in version 0.1.0.12 - 2005-07-18
985 o New directory servers:
986 - tor26 has changed IP address.
988 o Bugfixes on 0.1.0.x:
989 - Fix a possible double-free in tor_gzip_uncompress().
990 - When --disable-threads is set, do not search for or link against
992 - Don't trigger an assert if an authoritative directory server
993 claims its dirport is 0.
994 - Fix bug with removing Tor as an NT service: some people were
995 getting "The service did not return an error." Thanks to Matt
999 Changes in version 0.1.0.11 - 2005-06-30
1000 o Bugfixes on 0.1.0.x:
1001 - Fix major security bug: servers were disregarding their
1002 exit policies if clients behaved unexpectedly.
1003 - Make OS X init script check for missing argument, so we don't
1004 confuse users who invoke it incorrectly.
1005 - Fix a seg fault in "tor --hash-password foo".
1006 - The MAPADDRESS control command was broken.
1009 Changes in version 0.1.0.10 - 2005-06-14
1011 - Make NT services work and start on startup on Win32 (based on
1012 patch by Matt Edman). See the FAQ entry for details.
1013 - Make 'platform' string in descriptor more accurate for Win32
1014 servers, so it's not just "unknown platform".
1015 - REUSEADDR on normal platforms means you can rebind to the port
1016 right after somebody else has let it go. But REUSEADDR on Win32
1017 means you can bind to the port _even when somebody else already
1018 has it bound_! So, don't do that on Win32.
1019 - Clean up the log messages when starting on Win32 with no config
1021 - Allow seeding the RNG on Win32 even when you're not running as
1022 Administrator. If seeding the RNG on Win32 fails, quit.
1024 o Assert / crash bugs:
1025 - Refuse relay cells that claim to have a length larger than the
1026 maximum allowed. This prevents a potential attack that could read
1027 arbitrary memory (e.g. keys) from an exit server's process
1029 - If unofficial Tor clients connect and send weird TLS certs, our
1030 Tor server triggers an assert. Stop asserting, and start handling
1031 TLS errors better in other situations too.
1032 - Fix a race condition that can trigger an assert when we have a
1033 pending create cell and an OR connection attempt fails.
1036 - Use pthreads for worker processes rather than forking. This was
1037 forced because when we forked, we ended up wasting a lot of
1038 duplicate ram over time.
1039 - Also switch to foo_r versions of some library calls to allow
1040 reentry and threadsafeness.
1041 - Implement --disable-threads configure option. Disable threads on
1042 netbsd and openbsd by default, because they have no reentrant
1043 resolver functions (!), and on solaris since it has other
1045 - Fix possible bug on threading platforms (e.g. win32) which was
1046 leaking a file descriptor whenever a cpuworker or dnsworker died.
1047 - Fix a minor memory leak when somebody establishes an introduction
1048 point at your Tor server.
1049 - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
1051 - Add ./configure --with-dmalloc option, to track memory leaks.
1052 - And try to free all memory on closing, so we can detect what
1055 o Protocol correctness:
1056 - When we've connected to an OR and handshaked but didn't like
1057 the result, we were closing the conn without sending destroy
1058 cells back for pending circuits. Now send those destroys.
1059 - Start sending 'truncated' cells back rather than destroy cells
1060 if the circuit closes in front of you. This means we won't have
1061 to abandon partially built circuits.
1062 - Handle changed router status correctly when dirserver reloads
1063 fingerprint file. We used to be dropping all unverified descriptors
1064 right then. The bug was hidden because we would immediately
1065 fetch a directory from another dirserver, which would include the
1066 descriptors we just dropped.
1067 - Revise tor-spec to add more/better stream end reasons.
1068 - Revise all calls to connection_edge_end to avoid sending 'misc',
1069 and to take errno into account where possible.
1070 - Client now retries when streams end early for 'hibernating' or
1071 'resource limit' reasons, rather than failing them.
1072 - Try to be more zealous about calling connection_edge_end when
1073 things go bad with edge conns in connection.c.
1075 o Robustness improvements:
1076 - Better handling for heterogeneous / unreliable nodes:
1077 - Annotate circuits with whether they aim to contain high uptime
1078 nodes and/or high capacity nodes. When building circuits, choose
1080 - This means that every single node in an intro rend circuit,
1081 not just the last one, will have a minimum uptime.
1082 - New config option LongLivedPorts to indicate application streams
1083 that will want high uptime circuits.
1084 - Servers reset uptime when a dir fetch entirely fails. This
1085 hopefully reflects stability of the server's network connectivity.
1086 - If somebody starts his tor server in Jan 2004 and then fixes his
1087 clock, don't make his published uptime be a year.
1088 - Reset published uptime when we wake up from hibernation.
1089 - Introduce a notion of 'internal' circs, which are chosen without
1090 regard to the exit policy of the last hop. Intro and rendezvous
1091 circs must be internal circs, to avoid leaking information. Resolve
1092 and connect streams can use internal circs if they want.
1093 - New circuit pooling algorithm: keep track of what destination ports
1094 we've used recently (start out assuming we'll want to use 80), and
1095 make sure to have enough circs around to satisfy these ports. Also
1096 make sure to have 2 internal circs around if we've required internal
1097 circs lately (and with high uptime if we've seen that lately too).
1098 - Turn addr_policy_compare from a tristate to a quadstate; this should
1099 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
1100 for google.com" problem.
1101 - When a client asks us for a dir mirror and we don't have one,
1102 launch an attempt to get a fresh one.
1103 - First cut at support for "create-fast" cells. Clients can use
1104 these when extending to their first hop, since the TLS already
1105 provides forward secrecy and authentication. Not enabled on
1108 o Reachability testing.
1109 - Your Tor server will automatically try to see if its ORPort and
1110 DirPort are reachable from the outside, and it won't upload its
1111 descriptor until it decides at least ORPort is reachable (when
1112 DirPort is not yet found reachable, publish it as zero).
1113 - When building testing circs for ORPort testing, use only
1114 high-bandwidth nodes, so fewer circuits fail.
1115 - Notice when our IP changes, and reset stats/uptime/reachability.
1116 - Authdirservers don't do ORPort reachability detection, since
1117 they're in clique mode, so it will be rare to find a server not
1118 already connected to them.
1119 - Authdirservers now automatically approve nodes running 0.1.0.2-rc
1123 - Now we allow two unverified servers with the same nickname
1124 but different keys. But if a nickname is verified, only that
1125 nickname+key are allowed.
1126 - If you're an authdirserver connecting to an address:port,
1127 and it's not the OR you were expecting, forget about that
1128 descriptor. If he *was* the one you were expecting, then forget
1129 about all other descriptors for that address:port.
1130 - Allow servers to publish descriptors from 12 hours in the future.
1131 Corollary: only whine about clock skew from the dirserver if
1132 he's a trusted dirserver (since now even verified servers could
1133 have quite wrong clocks).
1134 - Require servers that use the default dirservers to have public IP
1135 addresses. We have too many servers that are configured with private
1136 IPs and their admins never notice the log entries complaining that
1137 their descriptors are being rejected.
1139 o Efficiency improvements:
1140 - Use libevent. Now we can use faster async cores (like epoll, kpoll,
1141 and /dev/poll), and hopefully work better on Windows too.
1142 - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
1143 kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
1144 - Find libevent even if it's hiding in /usr/local/ and your
1145 CFLAGS and LDFLAGS don't tell you to look there.
1146 - Be able to link with libevent as a shared library (the default
1147 after 1.0d), even if it's hiding in /usr/local/lib and even
1148 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
1149 assuming you're running gcc. Otherwise fail and give a useful
1151 - Switch to a new buffer management algorithm, which tries to avoid
1152 reallocing and copying quite as much. In first tests it looks like
1153 it uses *more* memory on average, but less cpu.
1154 - Switch our internal buffers implementation to use a ring buffer,
1155 to hopefully improve performance for fast servers a lot.
1156 - Reenable the part of the code that tries to flush as soon as an
1157 OR outbuf has a full TLS record available. Perhaps this will make
1158 OR outbufs not grow as huge except in rare cases, thus saving lots
1159 of CPU time plus memory.
1160 - Improve performance for dirservers: stop re-parsing the whole
1161 directory every time you regenerate it.
1162 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
1163 it much faster to look up a circuit for each relay cell.
1164 - Remove most calls to assert_all_pending_dns_resolves_ok(),
1165 since they're eating our cpu on exit nodes.
1166 - Stop wasting time doing a case insensitive comparison for every
1167 dns name every time we do any lookup. Canonicalize the names to
1168 lowercase when you first see them.
1171 - Handle unavailable hidden services better. Handle slow or busy
1172 hidden services better.
1173 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
1174 circ as necessary, if there are any completed ones lying around
1175 when we try to launch one.
1176 - Make hidden services try to establish a rendezvous for 30 seconds
1177 after fetching the descriptor, rather than for n (where n=3)
1178 attempts to build a circuit.
1179 - Adjust maximum skew and age for rendezvous descriptors: let skew
1180 be 48 hours rather than 90 minutes.
1181 - Reject malformed .onion addresses rather then passing them on as
1182 normal web requests.
1185 - More Tor controller support. See
1186 http://tor.eff.org/doc/control-spec.txt for all the new features,
1187 including signals to emulate unix signals from any platform;
1188 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
1189 closestream; closecircuit; etc.
1190 - Encode hashed controller passwords in hex instead of base64,
1191 to make it easier to write controllers.
1192 - Revise control spec and implementation to allow all log messages to
1193 be sent to controller with their severities intact (suggested by
1194 Matt Edman). Disable debug-level logs while delivering a debug-level
1195 log to the controller, to prevent loop. Update TorControl to handle
1196 new log event types.
1198 o New config options/defaults:
1199 - Begin scrubbing sensitive strings from logs by default. Turn off
1200 the config option SafeLogging if you need to do debugging.
1201 - New exit policy: accept most low-numbered ports, rather than
1202 rejecting most low-numbered ports.
1203 - Put a note in the torrc about abuse potential with the default
1205 - Add support for CONNECTing through https proxies, with "HttpsProxy"
1207 - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
1208 based on patch from Adam Langley (basic auth only).
1209 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
1210 the fast servers that have been joining lately. (Clients are now
1211 willing to load balance over up to 2 MB of advertised bandwidth
1213 - New config option MaxAdvertisedBandwidth which lets you advertise
1214 a low bandwidthrate (to not attract as many circuits) while still
1215 allowing a higher bandwidthrate in reality.
1216 - Require BandwidthRate to be at least 20kB/s for servers.
1217 - Add a NoPublish config option, so you can be a server (e.g. for
1218 testing running Tor servers in other Tor networks) without
1219 publishing your descriptor to the primary dirservers.
1220 - Add a new AddressMap config directive to rewrite incoming socks
1221 addresses. This lets you, for example, declare an implicit
1222 required exit node for certain sites.
1223 - Add a new TrackHostExits config directive to trigger addressmaps
1224 for certain incoming socks addresses -- for sites that break when
1225 your exit keeps changing (based on patch from Mike Perry).
1226 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
1227 which describes how often we retry making new circuits if current
1228 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
1229 how long we're willing to make use of an already-dirty circuit.
1230 - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
1231 a config option "ShutdownWaitLength" (when using kill -INT on
1233 - Fix an edge case in parsing config options: if they say "--"
1234 on the commandline, it's not a config option (thanks weasel).
1235 - New config option DirAllowPrivateAddresses for authdirservers.
1236 Now by default they refuse router descriptors that have non-IP or
1237 private-IP addresses.
1238 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
1239 smart" default value: low for servers and high for clients.
1240 - Some people were putting "Address " in their torrc, and they had
1241 a buggy resolver that resolved " " to 0.0.0.0. Oops.
1242 - If DataDir is ~/.tor, and that expands to /.tor, then default to
1243 LOCALSTATEDIR/tor instead.
1244 - Implement --verify-config command-line option to check if your torrc
1245 is valid without actually launching Tor.
1247 o Logging improvements:
1248 - When dirservers refuse a server descriptor, we now log its
1249 contactinfo, platform, and the poster's IP address.
1250 - Only warn once per nickname from add_nickname_list_to_smartlist()
1251 per failure, so an entrynode or exitnode choice that's down won't
1253 - When we're connecting to an OR and he's got a different nickname/key
1254 than we were expecting, only complain loudly if we're an OP or a
1255 dirserver. Complaining loudly to the OR admins just confuses them.
1256 - Whine at you if you're a server and you don't set your contactinfo.
1257 - Warn when exit policy implicitly allows local addresses.
1258 - Give a better warning when some other server advertises an
1259 ORPort that is actually an apache running ssl.
1260 - If we get an incredibly skewed timestamp from a dirserver mirror
1261 that isn't a verified OR, don't warn -- it's probably him that's
1263 - When a dirserver causes you to give a warn, mention which dirserver
1265 - Initialize libevent later in the startup process, so the logs are
1266 already established by the time we start logging libevent warns.
1267 - Use correct errno on win32 if libevent fails.
1268 - Check and warn about known-bad/slow libevent versions.
1269 - Stop warning about sigpipes in the logs. We're going to
1270 pretend that getting these occassionally is normal and fine.
1272 o New contrib scripts:
1273 - New experimental script tor/contrib/exitlist: a simple python
1274 script to parse directories and find Tor nodes that exit to listed
1276 - New experimental script tor/contrib/ExerciseServer.py (needs more
1277 work) that uses the controller interface to build circuits and
1278 fetch pages over them. This will help us bootstrap servers that
1279 have lots of capacity but haven't noticed it yet.
1280 - New experimental script tor/contrib/PathDemo.py (needs more work)
1281 that uses the controller interface to let you choose whole paths
1283 "<hostname>.<path,separated by dots>.<length of path>.path"
1284 - New contributed script "privoxy-tor-toggle" to toggle whether
1285 Privoxy uses Tor. Seems to be configured for Debian by default.
1286 - Have torctl.in/tor.sh.in check for location of su binary (needed
1290 - chdir() to your datadirectory at the *end* of the daemonize process,
1291 not the beginning. This was a problem because the first time you
1292 run tor, if your datadir isn't there, and you have runasdaemon set
1293 to 1, it will try to chdir to it before it tries to create it. Oops.
1294 - Fix several double-mark-for-close bugs, e.g. where we were finding
1295 a conn for a cell even if that conn is already marked for close.
1296 - Stop most cases of hanging up on a socks connection without sending
1298 - Fix a bug in the RPM package: set home directory for _tor to
1299 something more reasonable when first installing.
1300 - Stop putting nodename in the Platform string in server descriptors.
1301 It doesn't actually help, and it is confusing/upsetting some people.
1302 - When using preferred entry or exit nodes, ignore whether the
1303 circuit wants uptime or capacity. They asked for the nodes, they
1305 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
1306 artificially capped at 500kB.
1307 - Cache local dns resolves correctly even when they're .exit
1309 - If we're hibernating and we get a SIGINT, exit immediately.
1310 - tor-resolve requests were ignoring .exit if there was a working circuit
1311 they could use instead.
1312 - Pay more attention to the ClientOnly config option.
1313 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
1314 installer screens; and don't put stuff into StartupItems unless
1315 the user asks you to.
1318 - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
1319 rather than just rejecting it.
1320 - If our clock jumps forward by 100 seconds or more, assume something
1321 has gone wrong with our network and abandon all not-yet-used circs.
1322 - When an application is using socks5, give him the whole variety of
1323 potential socks5 responses (connect refused, host unreachable, etc),
1324 rather than just "success" or "failure".
1325 - A more sane version numbering system. See
1326 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
1327 - Change version parsing logic: a version is "obsolete" if it is not
1328 recommended and (1) there is a newer recommended version in the
1329 same series, or (2) there are no recommended versions in the same
1330 series, but there are some recommended versions in a newer series.
1331 A version is "new" if it is newer than any recommended version in
1333 - Report HTTP reasons to client when getting a response from directory
1334 servers -- so you can actually know what went wrong.
1335 - Reject odd-looking addresses at the client (e.g. addresses that
1336 contain a colon), rather than having the server drop them because
1338 - Stop publishing socksport in the directory, since it's not
1339 actually meant to be public. For compatibility, publish a 0 there
1341 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
1342 cookies to disk and doesn't log each web request to disk. (Thanks
1343 to Brett Carrington for pointing this out.)
1344 - Add OSX uninstall instructions. An actual uninstall script will
1346 - Add "opt hibernating 1" to server descriptor to make it clearer
1347 whether the server is hibernating.
1350 Changes in version 0.0.9.10 - 2005-06-16
1351 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
1352 - Refuse relay cells that claim to have a length larger than the
1353 maximum allowed. This prevents a potential attack that could read
1354 arbitrary memory (e.g. keys) from an exit server's process
1358 Changes in version 0.0.9.9 - 2005-04-23
1359 o Bugfixes on 0.0.9.x:
1360 - If unofficial Tor clients connect and send weird TLS certs, our
1361 Tor server triggers an assert. This release contains a minimal
1362 backport from the broader fix that we put into 0.1.0.4-rc.
1365 Changes in version 0.0.9.8 - 2005-04-07
1366 o Bugfixes on 0.0.9.x:
1367 - We have a bug that I haven't found yet. Sometimes, very rarely,
1368 cpuworkers get stuck in the 'busy' state, even though the cpuworker
1369 thinks of itself as idle. This meant that no new circuits ever got
1370 established. Here's a workaround to kill any cpuworker that's been
1371 busy for more than 100 seconds.
1374 Changes in version 0.0.9.7 - 2005-04-01
1375 o Bugfixes on 0.0.9.x:
1376 - Fix another race crash bug (thanks to Glenn Fink for reporting).
1377 - Compare identity to identity, not to nickname, when extending to
1378 a router not already in the directory. This was preventing us from
1379 extending to unknown routers. Oops.
1380 - Make sure to create OS X Tor user in <500 range, so we aren't
1381 creating actual system users.
1382 - Note where connection-that-hasn't-sent-end was marked, and fix
1383 a few really loud instances of this harmless bug (it's fixed more
1387 Changes in version 0.0.9.6 - 2005-03-24
1388 o Bugfixes on 0.0.9.x (crashes and asserts):
1389 - Add new end stream reasons to maintainance branch. Fix bug where
1390 reason (8) could trigger an assert. Prevent bug from recurring.
1391 - Apparently win32 stat wants paths to not end with a slash.
1392 - Fix assert triggers in assert_cpath_layer_ok(), where we were
1393 blowing away the circuit that conn->cpath_layer points to, then
1394 checking to see if the circ is well-formed. Backport check to make
1395 sure we dont use the cpath on a closed connection.
1396 - Prevent circuit_resume_edge_reading_helper() from trying to package
1397 inbufs for marked-for-close streams.
1398 - Don't crash on hup if your options->address has become unresolvable.
1399 - Some systems (like OS X) sometimes accept() a connection and tell
1400 you the remote host is 0.0.0.0:0. If this happens, due to some
1401 other mis-features, we get confused; so refuse the conn for now.
1403 o Bugfixes on 0.0.9.x (other):
1404 - Fix harmless but scary "Unrecognized content encoding" warn message.
1405 - Add new stream error reason: TORPROTOCOL reason means "you are not
1406 speaking a version of Tor I understand; say bye-bye to your stream."
1407 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
1408 into the future, now that we are more tolerant of skew. This
1409 resolves a bug where a Tor server would refuse to cache a directory
1410 because all the directories it gets are too far in the future;
1411 yet the Tor server never logs any complaints about clock skew.
1412 - Mac packaging magic: make man pages useable, and do not overwrite
1413 existing torrc files.
1414 - Make OS X log happily to /var/log/tor/tor.log
1417 Changes in version 0.0.9.5 - 2005-02-22
1418 o Bugfixes on 0.0.9.x:
1419 - Fix an assert race at exit nodes when resolve requests fail.
1420 - Stop picking unverified dir mirrors--it only leads to misery.
1421 - Patch from Matt Edman to make NT services work better. Service
1422 support is still not compiled into the executable by default.
1423 - Patch from Dmitri Bely so the Tor service runs better under
1424 the win32 SYSTEM account.
1425 - Make tor-resolve actually work (?) on Win32.
1426 - Fix a sign bug when getrlimit claims to have 4+ billion
1427 file descriptors available.
1428 - Stop refusing to start when bandwidthburst == bandwidthrate.
1429 - When create cells have been on the onion queue more than five
1430 seconds, just send back a destroy and take them off the list.
1433 Changes in version 0.0.9.4 - 2005-02-03
1434 o Bugfixes on 0.0.9:
1435 - Fix an assert bug that took down most of our servers: when
1436 a server claims to have 1 GB of bandwidthburst, don't
1438 - Don't crash as badly if we have spawned the max allowed number
1439 of dnsworkers, or we're out of file descriptors.
1440 - Block more file-sharing ports in the default exit policy.
1441 - MaxConn is now automatically set to the hard limit of max
1442 file descriptors we're allowed (ulimit -n), minus a few for
1444 - Give a clearer message when servers need to raise their
1445 ulimit -n when they start running out of file descriptors.
1446 - SGI Compatibility patches from Jan Schaumann.
1447 - Tolerate a corrupt cached directory better.
1448 - When a dirserver hasn't approved your server, list which one.
1449 - Go into soft hibernation after 95% of the bandwidth is used,
1450 not 99%. This is especially important for daily hibernators who
1451 have a small accounting max. Hopefully it will result in fewer
1452 cut connections when the hard hibernation starts.
1453 - Load-balance better when using servers that claim more than
1454 800kB/s of capacity.
1455 - Make NT services work (experimental, only used if compiled in).
1458 Changes in version 0.0.9.3 - 2005-01-21
1459 o Bugfixes on 0.0.9:
1460 - Backport the cpu use fixes from main branch, so busy servers won't
1461 need as much processor time.
1462 - Work better when we go offline and then come back, or when we
1463 run Tor at boot before the network is up. We do this by
1464 optimistically trying to fetch a new directory whenever an
1465 application request comes in and we think we're offline -- the
1466 human is hopefully a good measure of when the network is back.
1467 - Backport some minimal hidserv bugfixes: keep rend circuits open as
1468 long as you keep using them; actually publish hidserv descriptors
1469 shortly after they change, rather than waiting 20-40 minutes.
1470 - Enable Mac startup script by default.
1471 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
1472 - When you update AllowUnverifiedNodes or FirewallPorts via the
1473 controller's setconf feature, we were always appending, never
1475 - When you update HiddenServiceDir via setconf, it was screwing up
1476 the order of reading the lines, making it fail.
1477 - Do not rewrite a cached directory back to the cache; otherwise we
1478 will think it is recent and not fetch a newer one on startup.
1479 - Workaround for webservers that lie about Content-Encoding: Tor
1480 now tries to autodetect compressed directories and compression
1481 itself. This lets us Proxypass dir fetches through apache.
1484 Changes in version 0.0.9.2 - 2005-01-04
1485 o Bugfixes on 0.0.9 (crashes and asserts):
1486 - Fix an assert on startup when the disk is full and you're logging
1488 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
1489 style address, then we'd crash.
1490 - Fix an assert trigger when the running-routers string we get from
1491 a dirserver is broken.
1492 - Make worker threads start and run on win32. Now win32 servers
1494 - Bandaid (not actually fix, but now it doesn't crash) an assert
1495 where the dns worker dies mysteriously and the main Tor process
1496 doesn't remember anything about the address it was resolving.
1498 o Bugfixes on 0.0.9 (Win32):
1499 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
1500 name out of the warning/assert messages.
1501 - Fix a superficial "unhandled error on read" bug on win32.
1502 - The win32 installer no longer requires a click-through for our
1503 license, since our Free Software license grants rights but does not
1505 - Win32: When connecting to a dirserver fails, try another one
1506 immediately. (This was already working for non-win32 Tors.)
1507 - Stop trying to parse $HOME on win32 when hunting for default
1509 - Make tor-resolve.c work on win32 by calling network_init().
1511 o Bugfixes on 0.0.9 (other):
1512 - Make 0.0.9.x build on Solaris again.
1513 - Due to a fencepost error, we were blowing away the \n when reporting
1514 confvalue items in the controller. So asking for multiple config
1515 values at once couldn't work.
1516 - When listing circuits that are pending on an opening OR connection,
1517 if we're an OR we were listing circuits that *end* at us as
1518 being pending on every listener, dns/cpu worker, etc. Stop that.
1519 - Dirservers were failing to create 'running-routers' or 'directory'
1520 strings if we had more than some threshold of routers. Fix them so
1521 they can handle any number of routers.
1522 - Fix a superficial "Duplicate mark for close" bug.
1523 - Stop checking for clock skew for OR connections, even for servers.
1524 - Fix a fencepost error that was chopping off the last letter of any
1525 nickname that is the maximum allowed nickname length.
1526 - Update URLs in log messages so they point to the new website.
1527 - Fix a potential problem in mangling server private keys while
1528 writing to disk (not triggered yet, as far as we know).
1529 - Include the licenses for other free software we include in Tor,
1530 now that we're shipping binary distributions more regularly.
1533 Changes in version 0.0.9.1 - 2004-12-15
1534 o Bugfixes on 0.0.9:
1535 - Make hibernation actually work.
1536 - Make HashedControlPassword config option work.
1537 - When we're reporting event circuit status to a controller,
1538 don't use the stream status code.
1541 Changes in version 0.0.9 - 2004-12-12
1542 o Bugfixes on 0.0.8.1 (Crashes and asserts):
1543 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
1544 write() call will fail and we handle it there.
1545 - When we run out of disk space, or other log writing error, don't
1546 crash. Just stop logging to that log and continue.
1547 - Fix isspace() and friends so they still make Solaris happy
1548 but also so they don't trigger asserts on win32.
1549 - Fix assert failure on malformed socks4a requests.
1550 - Fix an assert bug where a hidden service provider would fail if
1551 the first hop of his rendezvous circuit was down.
1552 - Better handling of size_t vs int, so we're more robust on 64
1555 o Bugfixes on 0.0.8.1 (Win32):
1556 - Make windows sockets actually non-blocking (oops), and handle
1557 win32 socket errors better.
1558 - Fix parse_iso_time on platforms without strptime (eg win32).
1559 - win32: when being multithreaded, leave parent fdarray open.
1560 - Better handling of winsock includes on non-MSV win32 compilers.
1561 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
1563 - Make unit tests work on win32.
1565 o Bugfixes on 0.0.8.1 (Path selection and streams):
1566 - Calculate timeout for waiting for a connected cell from the time
1567 we sent the begin cell, not from the time the stream started. If
1568 it took a long time to establish the circuit, we would time out
1569 right after sending the begin cell.
1570 - Fix router_compare_addr_to_addr_policy: it was not treating a port
1571 of * as always matching, so we were picking reject *:* nodes as
1572 exit nodes too. Oops.
1573 - When read() failed on a stream, we would close it without sending
1574 back an end. So 'connection refused' would simply be ignored and
1575 the user would get no response.
1576 - Stop a sigpipe: when an 'end' cell races with eof from the app,
1577 we shouldn't hold-open-until-flush if the eof arrived first.
1578 - Let resolve conns retry/expire also, rather than sticking around
1580 - Fix more dns related bugs: send back resolve_failed and end cells
1581 more reliably when the resolve fails, rather than closing the
1582 circuit and then trying to send the cell. Also attach dummy resolve
1583 connections to a circuit *before* calling dns_resolve(), to fix
1584 a bug where cached answers would never be sent in RESOLVED cells.
1586 o Bugfixes on 0.0.8.1 (Circuits):
1587 - Finally fix a bug that's been plaguing us for a year:
1588 With high load, circuit package window was reaching 0. Whenever
1589 we got a circuit-level sendme, we were reading a lot on each
1590 socket, but only writing out a bit. So we would eventually reach
1591 eof. This would be noticed and acted on even when there were still
1592 bytes sitting in the inbuf.
1593 - Use identity comparison, not nickname comparison, to choose which
1594 half of circuit-ID-space each side gets to use. This is needed
1595 because sometimes we think of a router as a nickname, and sometimes
1596 as a hex ID, and we can't predict what the other side will do.
1598 o Bugfixes on 0.0.8.1 (Other):
1599 - Fix a whole slew of memory leaks.
1600 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
1601 - If we are using select, make sure we stay within FD_SETSIZE.
1602 - When poll() is interrupted, we shouldn't believe the revents values.
1603 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
1604 and smartlist_len, which are two major profiling offenders.
1605 - If do_hup fails, actually notice.
1606 - Flush the log file descriptor after we print "Tor opening log file",
1607 so we don't see those messages days later.
1608 - Hidden service operators now correctly handle version 1 style
1609 INTRODUCE1 cells (nobody generates them still, so not a critical
1611 - Handle more errnos from accept() without closing the listener.
1612 Some OpenBSD machines were closing their listeners because
1613 they ran out of file descriptors.
1614 - Some people had wrapped their tor client/server in a script
1615 that would restart it whenever it died. This did not play well
1616 with our "shut down if your version is obsolete" code. Now people
1617 don't fetch a new directory if their local cached version is
1619 - Make our autogen.sh work on ksh as well as bash.
1620 - Better torrc example lines for dirbindaddress and orbindaddress.
1621 - Improved bounds checking on parsed ints (e.g. config options and
1622 the ones we find in directories.)
1623 - Stop using separate defaults for no-config-file and
1624 empty-config-file. Now you have to explicitly turn off SocksPort,
1625 if you don't want it open.
1626 - We were starting to daemonize before we opened our logs, so if
1627 there were any problems opening logs, we would complain to stderr,
1628 which wouldn't work, and then mysteriously exit.
1629 - If a verified OR connects to us before he's uploaded his descriptor,
1630 or we verify him and hup but he still has the original TLS
1631 connection, then conn->nickname is still set like he's unverified.
1633 o Code security improvements, inspired by Ilja:
1634 - tor_snprintf wrapper over snprintf with consistent (though not C99)
1636 - Replace sprintf with tor_snprintf. (I think they were all safe, but
1638 - Replace strcpy/strncpy with strlcpy in more places.
1639 - Avoid strcat; use tor_snprintf or strlcat instead.
1641 o Features (circuits and streams):
1642 - New circuit building strategy: keep a list of ports that we've
1643 used in the past 6 hours, and always try to have 2 circuits open
1644 or on the way that will handle each such port. Seed us with port
1645 80 so web users won't complain that Tor is "slow to start up".
1646 - Make kill -USR1 dump more useful stats about circuits.
1647 - When warning about retrying or giving up, print the address, so
1648 the user knows which one it's talking about.
1649 - If you haven't used a clean circuit in an hour, throw it away,
1650 just to be on the safe side. (This means after 6 hours a totally
1651 unused Tor client will have no circuits open.)
1652 - Support "foo.nickname.exit" addresses, to let Alice request the
1653 address "foo" as viewed by exit node "nickname". Based on a patch
1655 - If your requested entry or exit node has advertised bandwidth 0,
1657 - Be more greedy about filling up relay cells -- we try reading again
1658 once we've processed the stuff we read, in case enough has arrived
1659 to fill the last cell completely.
1660 - Refuse application socks connections to port 0.
1661 - Use only 0.0.9pre1 and later servers for resolve cells.
1663 o Features (bandwidth):
1664 - Hibernation: New config option "AccountingMax" lets you
1665 set how many bytes per month (in each direction) you want to
1666 allow your server to consume. Rather than spreading those
1667 bytes out evenly over the month, we instead hibernate for some
1668 of the month and pop up at a deterministic time, work until
1669 the bytes are consumed, then hibernate again. Config option
1670 "MonthlyAccountingStart" lets you specify which day of the month
1671 your billing cycle starts on.
1672 - Implement weekly/monthly/daily accounting: now you specify your
1673 hibernation properties by
1674 AccountingMax N bytes|KB|MB|GB|TB
1675 AccountingStart day|week|month [day] HH:MM
1676 Defaults to "month 1 0:00".
1677 - Let bandwidth and interval config options be specified as 5 bytes,
1678 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
1680 o Features (directories):
1681 - New "router-status" line in directory, to better bind each verified
1682 nickname to its identity key.
1683 - Clients can ask dirservers for /dir.z to get a compressed version
1684 of the directory. Only works for servers running 0.0.9, of course.
1685 - Make clients cache directories and use them to seed their router
1686 lists at startup. This means clients have a datadir again.
1687 - Respond to content-encoding headers by trying to uncompress as
1689 - Clients and servers now fetch running-routers; cache
1690 running-routers; compress running-routers; serve compressed
1692 - Make moria2 advertise a dirport of 80, so people behind firewalls
1693 will be able to get a directory.
1694 - Http proxy support
1695 - Dirservers translate requests for http://%s:%d/x to /x
1696 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
1697 be routed through this host.
1698 - Clients ask for /tor/x rather than /x for new enough dirservers.
1699 This way we can one day coexist peacefully with apache.
1700 - Clients specify a "Host: %s%d" http header, to be compatible
1701 with more proxies, and so running squid on an exit node can work.
1702 - Protect dirservers from overzealous descriptor uploading -- wait
1703 10 seconds after directory gets dirty, before regenerating.
1705 o Features (packages and install):
1706 - Add NSI installer contributed by J Doe.
1707 - Apply NT service patch from Osamu Fujino. Still needs more work.
1708 - Commit VC6 and VC7 workspace/project files.
1709 - Commit a tor.spec for making RPM files, with help from jbash.
1710 - Add contrib/torctl.in contributed by Glenn Fink.
1711 - Make expand_filename handle ~ and ~username.
1712 - Use autoconf to enable largefile support where necessary. Use
1713 ftello where available, since ftell can fail at 2GB.
1714 - Ship src/win32/ in the tarball, so people can use it to build.
1715 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
1718 o Features (ui controller):
1719 - Control interface: a separate program can now talk to your
1720 client/server over a socket, and get/set config options, receive
1721 notifications of circuits and streams starting/finishing/dying,
1722 bandwidth used, etc. The next step is to get some GUIs working.
1723 Let us know if you want to help out. See doc/control-spec.txt .
1724 - Ship a contrib/tor-control.py as an example script to interact
1725 with the control port.
1726 - "tor --hash-password zzyxz" will output a salted password for
1727 use in authenticating to the control interface.
1728 - Implement the control-spec's SAVECONF command, to write your
1729 configuration to torrc.
1730 - Get cookie authentication for the controller closer to working.
1731 - When set_conf changes our server descriptor, upload a new copy.
1732 But don't upload it too often if there are frequent changes.
1734 o Features (config and command-line):
1735 - Deprecate unofficial config option abbreviations, and abbreviations
1736 not on the command line.
1737 - Configuration infrastructure support for warning on obsolete
1739 - Give a slightly more useful output for "tor -h".
1740 - Break DirFetchPostPeriod into:
1741 - DirFetchPeriod for fetching full directory,
1742 - StatusFetchPeriod for fetching running-routers,
1743 - DirPostPeriod for posting server descriptor,
1744 - RendPostPeriod for posting hidden service descriptors.
1745 - New log format in config:
1746 "Log minsev[-maxsev] stdout|stderr|syslog" or
1747 "Log minsev[-maxsev] file /var/foo"
1748 - DirPolicy config option, to let people reject incoming addresses
1749 from their dirserver.
1750 - "tor --list-fingerprint" will list your identity key fingerprint
1752 - Make tor --version --version dump the cvs Id of every file.
1753 - New 'MyFamily nick1,...' config option for a server to
1754 specify other servers that shouldn't be used in the same circuit
1755 with it. Only believed if nick1 also specifies us.
1756 - New 'NodeFamily nick1,nick2,...' config option for a client to
1757 specify nodes that it doesn't want to use in the same circuit.
1758 - New 'Redirectexit pattern address:port' config option for a
1759 server to redirect exit connections, e.g. to a local squid.
1760 - Add "pass" target for RedirectExit, to make it easier to break
1761 out of a sequence of RedirectExit rules.
1762 - Make the dirservers file obsolete.
1763 - Include a dir-signing-key token in directories to tell the
1764 parsing entity which key is being used to sign.
1765 - Remove the built-in bulky default dirservers string.
1766 - New config option "Dirserver %s:%d [fingerprint]", which can be
1767 repeated as many times as needed. If no dirservers specified,
1768 default to moria1,moria2,tor26.
1769 - Make 'Routerfile' config option obsolete.
1770 - Discourage people from setting their dirfetchpostperiod more often
1771 than once per minute.
1774 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
1775 get back to normal.)
1776 - Accept *:706 (silc) in default exit policy.
1777 - Implement new versioning format for post 0.1.
1778 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
1779 log more informatively.
1780 - Check clock skew for verified servers, but allow unverified
1781 servers and clients to have any clock skew.
1782 - Make sure the hidden service descriptors are at a random offset
1783 from each other, to hinder linkability.
1784 - Clients now generate a TLS cert too, in preparation for having
1785 them act more like real nodes.
1786 - Add a pure-C tor-resolve implementation.
1787 - Use getrlimit and friends to ensure we can reach MaxConn (currently
1788 1024) file descriptors.
1789 - Raise the max dns workers from 50 to 100.
1792 Changes in version 0.0.8.1 - 2004-10-13
1794 - Fix a seg fault that can be triggered remotely for Tor
1795 clients/servers with an open dirport.
1796 - Fix a rare assert trigger, where routerinfos for entries in
1797 our cpath would expire while we're building the path.
1798 - Fix a bug in OutboundBindAddress so it (hopefully) works.
1799 - Fix a rare seg fault for people running hidden services on
1800 intermittent connections.
1801 - Fix a bug in parsing opt keywords with objects.
1802 - Fix a stale pointer assert bug when a stream detaches and
1804 - Fix a string format vulnerability (probably not exploitable)
1805 in reporting stats locally.
1806 - Fix an assert trigger: sometimes launching circuits can fail
1807 immediately, e.g. because too many circuits have failed recently.
1808 - Fix a compile warning on 64 bit platforms.
1811 Changes in version 0.0.8 - 2004-08-25
1813 - Made our unit tests compile again on OpenBSD 3.5, and tor
1814 itself compile again on OpenBSD on a sparc64.
1815 - We were neglecting milliseconds when logging on win32, so
1816 everything appeared to happen at the beginning of each second.
1817 - Check directory signature _before_ you decide whether you're
1818 you're running an obsolete version and should exit.
1819 - Check directory signature _before_ you parse the running-routers
1820 list to decide who's running.
1821 - Check return value of fclose while writing to disk, so we don't
1822 end up with broken files when servers run out of disk space.
1823 - Port it to SunOS 5.9 / Athena
1824 - Fix two bugs in saving onion keys to disk when rotating, so
1825 hopefully we'll get fewer people using old onion keys.
1826 - Remove our mostly unused -- and broken -- hex_encode()
1827 function. Use base16_encode() instead. (Thanks to Timo Lindfors
1828 for pointing out this bug.)
1829 - Only pick and establish intro points after we've gotten a
1831 - Fix assert triggers: if the other side returns an address 0.0.0.0,
1832 don't put it into the client dns cache.
1833 - If a begin failed due to exit policy, but we believe the IP
1834 address should have been allowed, switch that router to exitpolicy
1835 reject *:* until we get our next directory.
1838 - 'Extend' relay cell payloads now include the digest of the
1839 intended next hop's identity key. Now we can verify that we're
1840 extending to the right router, and also extend to routers we
1841 hadn't heard of before.
1844 - Tor nodes can now act as relays (with an advertised ORPort)
1845 without being manually verified by the dirserver operators.
1846 - Uploaded descriptors of unverified routers are now accepted
1847 by the dirservers, and included in the directory.
1848 - Verified routers are listed by nickname in the running-routers
1849 list; unverified routers are listed as "$<fingerprint>".
1850 - We now use hash-of-identity-key in most places rather than
1851 nickname or addr:port, for improved security/flexibility.
1852 - AllowUnverifiedNodes config option to let circuits choose no-name
1853 routers in entry,middle,exit,introduction,rendezvous positions.
1854 Allow middle and rendezvous positions by default.
1855 - When picking unverified routers, skip those with low uptime and/or
1856 low bandwidth, depending on what properties you care about.
1857 - ClientOnly option for nodes that never want to become servers.
1858 - Directory caching.
1859 - "AuthoritativeDir 1" option for the official dirservers.
1860 - Now other nodes (clients and servers) will cache the latest
1861 directory they've pulled down.
1862 - They can enable their DirPort to serve it to others.
1863 - Clients will pull down a directory from any node with an open
1864 DirPort, and check the signature/timestamp correctly.
1865 - Authoritative dirservers now fetch directories from other
1866 authdirservers, to stay better synced.
1867 - Running-routers list tells who's down also, along with noting
1868 if they're verified (listed by nickname) or unverified (listed
1870 - Allow dirservers to serve running-router list separately.
1871 This isn't used yet.
1872 - You can now fetch $DIRURL/running-routers to get just the
1873 running-routers line, not the whole descriptor list. (But
1874 clients don't use this yet.)
1875 - Clients choose nodes proportional to advertised bandwidth.
1876 - Clients avoid using nodes with low uptime as introduction points.
1877 - Handle servers with dynamic IP addresses: don't just replace
1878 options->Address with the resolved one at startup, and
1879 detect our address right before we make a routerinfo each time.
1880 - 'FascistFirewall' option to pick dirservers and ORs on specific
1881 ports; plus 'FirewallPorts' config option to tell FascistFirewall
1882 which ports are open. (Defaults to 80,443)
1883 - Try other dirservers immediately if the one you try is down. This
1884 should tolerate down dirservers better now.
1885 - ORs connect-on-demand to other ORs
1886 - If you get an extend cell to an OR you're not connected to,
1887 connect, handshake, and forward the create cell.
1888 - The authoritative dirservers stay connected to everybody,
1889 and everybody stays connected to 0.0.7 servers, but otherwise
1890 clients/servers expire unused connections after 5 minutes.
1891 - When servers get a sigint, they delay 30 seconds (refusing new
1892 connections) then exit. A second sigint causes immediate exit.
1893 - File and name management:
1894 - Look for .torrc if no CONFDIR "torrc" is found.
1895 - If no datadir is defined, then choose, make, and secure ~/.tor
1897 - If torrc not found, exitpolicy reject *:*.
1898 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
1899 - If no nickname is defined, derive default from hostname.
1900 - Rename secret key files, e.g. identity.key -> secret_id_key,
1901 to discourage people from mailing their identity key to tor-ops.
1902 - Refuse to build a circuit before the directory has arrived --
1903 it won't work anyway, since you won't know the right onion keys
1905 - Parse tor version numbers so we can do an is-newer-than check
1906 rather than an is-in-the-list check.
1907 - New socks command 'resolve', to let us shim gethostbyname()
1909 - A 'tor_resolve' script to access the socks resolve functionality.
1910 - A new socks-extensions.txt doc file to describe our
1911 interpretation and extensions to the socks protocols.
1912 - Add a ContactInfo option, which gets published in descriptor.
1913 - Write tor version at the top of each log file
1914 - New docs in the tarball:
1916 - Document that you should proxy your SSL traffic too.
1917 - Log a warning if the user uses an unsafe socks variant, so people
1918 are more likely to learn about privoxy or socat.
1919 - Log a warning if you're running an unverified server, to let you
1920 know you might want to get it verified.
1921 - Change the default exit policy to reject the default edonkey,
1922 kazaa, gnutella ports.
1923 - Add replace_file() to util.[ch] to handle win32's rename().
1924 - Publish OR uptime in descriptor (and thus in directory) too.
1925 - Remember used bandwidth (both in and out), and publish 15-minute
1926 snapshots for the past day into our descriptor.
1927 - Be more aggressive about trying to make circuits when the network
1928 has changed (e.g. when you unsuspend your laptop).
1929 - Check for time skew on http headers; report date in response to
1931 - If the entrynode config line has only one node, don't pick it as
1933 - Add strict{entry|exit}nodes config options. If set to 1, then
1934 we refuse to build circuits that don't include the specified entry
1936 - OutboundBindAddress config option, to bind to a specific
1937 IP address for outgoing connect()s.
1938 - End truncated log entries (e.g. directories) with "[truncated]".
1941 Changes in version 0.0.7.3 - 2004-08-12
1942 o Stop dnsworkers from triggering an assert failure when you
1943 ask them to resolve the host "".
1946 Changes in version 0.0.7.2 - 2004-07-07
1947 o A better fix for the 0.0.0.0 problem, that will hopefully
1948 eliminate the remaining related assertion failures.
1951 Changes in version 0.0.7.1 - 2004-07-04
1952 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
1953 since internally we use 0.0.0.0 to signify "not yet resolved".
1956 Changes in version 0.0.7 - 2004-06-07
1957 o Fixes for crashes and other obnoxious bugs:
1958 - Fix an epipe bug: sometimes when directory connections failed
1959 to connect, we would give them a chance to flush before closing
1961 - When we detached from a circuit because of resolvefailed, we
1962 would immediately try the same circuit twice more, and then
1963 give up on the resolve thinking we'd tried three different
1965 - Limit the number of intro circuits we'll attempt to build for a
1966 hidden service per 15-minute period.
1967 - Check recommended-software string *early*, before actually parsing
1968 the directory. Thus we can detect an obsolete version and exit,
1969 even if the new directory format doesn't parse.
1970 o Fixes for security bugs:
1971 - Remember which nodes are dirservers when you startup, and if a
1972 random OR enables his dirport, don't automatically assume he's
1973 a trusted dirserver.
1975 - Directory connections were asking the wrong poll socket to
1976 start writing, and not asking themselves to start writing.
1977 - When we detached from a circuit because we sent a begin but
1978 didn't get a connected, we would use it again the first time;
1979 but after that we would correctly switch to a different one.
1980 - Stop warning when the first onion decrypt attempt fails; they
1981 will sometimes legitimately fail now that we rotate keys.
1982 - Override unaligned-access-ok check when $host_cpu is ia64 or
1983 arm. Apparently they allow it but the kernel whines.
1984 - Dirservers try to reconnect periodically too, in case connections
1986 - Fix some memory leaks in directory servers.
1987 - Allow backslash in Win32 filenames.
1988 - Made Tor build complain-free on FreeBSD, hopefully without
1989 breaking other BSD builds. We'll see.
1990 - Check directory signatures based on name of signer, not on whom
1991 we got the directory from. This will let us cache directories more
1993 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
1996 - Doxygen markup on all functions and global variables.
1997 - Make directory functions update routerlist, not replace it. So
1998 now directory disagreements are not so critical a problem.
1999 - Remove the upper limit on number of descriptors in a dirserver's
2000 directory (not that we were anywhere close).
2001 - Allow multiple logfiles at different severity ranges.
2002 - Allow *BindAddress to specify ":port" rather than setting *Port
2003 separately. Allow multiple instances of each BindAddress config
2004 option, so you can bind to multiple interfaces if you want.
2005 - Allow multiple exit policy lines, which are processed in order.
2006 Now we don't need that huge line with all the commas in it.
2007 - Enable accept/reject policies on SOCKS connections, so you can bind
2008 to 0.0.0.0 but still control who can use your OP.
2009 - Updated the man page to reflect these features.
2012 Changes in version 0.0.6.2 - 2004-05-16
2013 o Our integrity-checking digest was checking only the most recent cell,
2014 not the previous cells like we'd thought.
2015 Thanks to Stefan Mark for finding the flaw!
2018 Changes in version 0.0.6.1 - 2004-05-06
2019 o Fix two bugs in our AES counter-mode implementation (this affected
2020 onion-level stream encryption, but not TLS-level). It turns
2021 out we were doing something much more akin to a 16-character
2022 polyalphabetic cipher. Oops.
2023 Thanks to Stefan Mark for finding the flaw!
2024 o Retire moria3 as a directory server, and add tor26 as a directory
2028 Changes in version 0.0.6 - 2004-05-02
2030 - Hidden services and rendezvous points are implemented. Go to
2031 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
2032 hidden services. (This only works via a socks4a proxy such as
2033 Privoxy, and currently it's quite slow.)
2034 - We now rotate link (tls context) keys and onion keys.
2035 - CREATE cells now include oaep padding, so you can tell
2036 if you decrypted them correctly.
2037 - Retry stream correctly when we fail to connect because of
2038 exit-policy-reject (should try another) or can't-resolve-address.
2039 - When we hup a dirserver and we've *removed* a server from the
2040 approved-routers list, now we remove that server from the
2041 in-memory directories too.
2042 - Add bandwidthburst to server descriptor.
2043 - Directories now say which dirserver signed them.
2044 - Use a tor_assert macro that logs failed assertions too.
2045 - Since we don't support truncateds much, don't bother sending them;
2046 just close the circ.
2047 - Fetch randomness from /dev/urandom better (not via fopen/fread)
2048 - Better debugging for tls errors
2049 - Set Content-Type on the directory and hidserv descriptor.
2050 - Remove IVs from cipher code, since AES-ctr has none.
2052 - Fix an assert trigger for exit nodes that's been plaguing us since
2053 the days of 0.0.2prexx (thanks weasel!)
2054 - Fix a bug where we were closing tls connections intermittently.
2055 It turns out openssl keeps its errors around -- so if an error
2056 happens, and you don't ask about it, and then another openssl
2057 operation happens and succeeds, and you ask if there was an error,
2058 it tells you about the first error.
2059 - Fix a bug that's been lurking since 27 may 03 (!)
2060 When passing back a destroy cell, we would use the wrong circ id.
2061 - Don't crash if a conn that sent a begin has suddenly lost its circuit.
2062 - Some versions of openssl have an SSL_pending function that erroneously
2063 returns bytes when there is a non-application record pending.
2064 - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
2065 o We were using an array of length zero in a few places.
2066 o Win32's gethostbyname can't resolve an IP to an IP.
2067 o Win32's close can't close a socket.
2068 o Handle windows socket errors correctly.
2070 - check for <sys/limits.h> so we build on FreeBSD again, and
2071 <machine/limits.h> for NetBSD.
2074 Changes in version 0.0.5 - 2004-03-30
2075 o Install torrc as torrc.sample -- we no longer clobber your
2077 o Fix mangled-state bug in directory fetching (was causing sigpipes).
2078 o Only build circuits after we've fetched the directory: clients were
2079 using only the directory servers before they'd fetched a directory.
2080 This also means longer startup time; so it goes.
2081 o Fix an assert trigger where an OP would fail to handshake, and we'd
2082 expect it to have a nickname.
2083 o Work around a tsocks bug: do a socks reject when AP connection dies
2084 early, else tsocks goes into an infinite loop.
2085 o Hold socks connection open until reply is flushed (if possible)
2086 o Make exit nodes resolve IPs to IPs immediately, rather than asking
2087 the dns farm to do it.
2088 o Fix c99 aliasing warnings in rephist.c
2089 o Don't include server descriptors that are older than 24 hours in the
2091 o Give socks 'reject' replies their whole 15s to attempt to flush,
2092 rather than seeing the 60s timeout and assuming the flush had failed.
2093 o Clean automake droppings from the cvs repository
2094 o Add in a 'notice' log level for things the operator should hear
2095 but that aren't warnings
2098 Changes in version 0.0.4 - 2004-03-26
2099 o When connecting to a dirserver or OR and the network is down,
2103 Changes in version 0.0.3 - 2004-03-26
2104 o Warn and fail if server chose a nickname with illegal characters
2105 o Port to Solaris and Sparc:
2106 - include missing header fcntl.h
2107 - have autoconf find -lsocket -lnsl automatically
2108 - deal with hardware word alignment
2109 - make uname() work (solaris has a different return convention)
2110 - switch from using signal() to sigaction()
2111 o Preliminary work on reputation system:
2112 - Keep statistics on success/fail of connect attempts; they're published
2113 by kill -USR1 currently.
2114 - Add a RunTesting option to try to learn link state by creating test
2115 circuits, even when SocksPort is off.
2116 - Remove unused open circuits when there are too many.
2119 Changes in version 0.0.2 - 2004-03-19
2120 - Include strlcpy and strlcat for safer string ops
2121 - define INADDR_NONE so we compile (but still not run) on solaris
2124 Changes in version 0.0.2pre27 - 2004-03-14
2126 - Allow internal tor networks (we were rejecting internal IPs,
2127 now we allow them if they're set explicitly).
2128 - And fix a few endian issues.
2131 Changes in version 0.0.2pre26 - 2004-03-14
2133 - If a stream times out after 15s without a connected cell, don't
2134 try that circuit again: try a new one.
2135 - Retry streams at most 4 times. Then give up.
2136 - When a dirserver gets a descriptor from an unknown router, it
2137 logs its fingerprint (so the dirserver operator can choose to
2138 accept it even without mail from the server operator).
2139 - Inform unapproved servers when we reject their descriptors.
2140 - Make tor build on Windows again. It works as a client, who knows
2142 - Clearer instructions in the torrc for how to set up a server.
2143 - Be more efficient about reading fd's when our global token bucket
2144 (used for rate limiting) becomes empty.
2146 - Stop asserting that computers always go forward in time. It's
2148 - When we sent a cell (e.g. destroy) and then marked an OR connection
2149 expired, we might close it before finishing a flush if the other
2150 side isn't reading right then.
2151 - Don't allow dirservers to start if they haven't defined
2153 - We were caching transient dns failures. Oops.
2154 - Prevent servers from publishing an internal IP as their address.
2155 - Address a strcat vulnerability in circuit.c
2158 Changes in version 0.0.2pre25 - 2004-03-04
2160 - Put the OR's IP in its router descriptor, not its fqdn. That way
2161 we'll stop being stalled by gethostbyname for nodes with flaky dns,
2164 - If the user typed in an address that didn't resolve, the server
2168 Changes in version 0.0.2pre24 - 2004-03-03
2170 - Fix an assertion failure in dns.c, where we were trying to dequeue
2171 a pending dns resolve even if it wasn't pending
2172 - Fix a spurious socks5 warning about still trying to write after the
2173 connection is finished.
2174 - Hold certain marked_for_close connections open until they're finished
2175 flushing, rather than losing bytes by closing them too early.
2176 - Correctly report the reason for ending a stream
2177 - Remove some duplicate calls to connection_mark_for_close
2178 - Put switch_id and start_daemon earlier in the boot sequence, so it
2179 will actually try to chdir() to options.DataDirectory
2180 - Make 'make test' exit(1) if a test fails; fix some unit tests
2181 - Make tor fail when you use a config option it doesn't know about,
2182 rather than warn and continue.
2183 - Make --version work
2184 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
2187 Changes in version 0.0.2pre23 - 2004-02-29
2189 - Print a statement when the first circ is finished, so the user
2191 - If a relay cell is unrecognized at the end of the circuit,
2192 send back a destroy. (So attacks to mutate cells are more
2194 - New config option 'excludenodes' to avoid certain nodes for circuits.
2195 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
2196 so you can collect coredumps there.
2198 - Fix a bug in tls flushing where sometimes data got wedged and
2199 didn't flush until more data got sent. Hopefully this bug was
2200 a big factor in the random delays we were seeing.
2201 - Make 'connected' cells include the resolved IP, so the client
2202 dns cache actually gets populated.
2203 - Disallow changing from ORPort=0 to ORPort>0 on hup.
2204 - When we time-out on a stream and detach from the circuit, send an
2205 end cell down it first.
2206 - Only warn about an unknown router (in exitnodes, entrynodes,
2207 excludenodes) after we've fetched a directory.
2210 Changes in version 0.0.2pre22 - 2004-02-26
2212 - Servers publish less revealing uname information in descriptors.
2213 - More memory tracking and assertions, to crash more usefully when
2215 - If the default torrc isn't there, just use some default defaults.
2216 Plus provide an internal dirservers file if they don't have one.
2217 - When the user tries to use Tor as an http proxy, give them an http
2218 501 failure explaining that we're a socks proxy.
2219 - Dump a new router.desc on hup, to help confused people who change
2220 their exit policies and then wonder why router.desc doesn't reflect
2222 - Clean up the generic tor.sh init script that we ship with.
2224 - If the exit stream is pending on the resolve, and a destroy arrives,
2225 then the stream wasn't getting removed from the pending list. I
2226 think this was the one causing recent server crashes.
2227 - Use a more robust poll on OSX 10.3, since their poll is flaky.
2228 - When it couldn't resolve any dirservers, it was useless from then on.
2229 Now it reloads the RouterFile (or default dirservers) if it has no
2231 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
2232 many users don't even *have* a /usr/local/sbin/.
2235 Changes in version 0.0.2pre21 - 2004-02-18
2237 - There's a ChangeLog file that actually reflects the changelog.
2238 - There's a 'torify' wrapper script, with an accompanying
2239 tor-tsocks.conf, that simplifies the process of using tsocks for
2240 tor. It even has a man page.
2241 - The tor binary gets installed to sbin rather than bin now.
2242 - Retry streams where the connected cell hasn't arrived in 15 seconds
2243 - Clean up exit policy handling -- get the default out of the torrc,
2244 so we can update it without forcing each server operator to fix
2246 - Allow imaps and pop3s in default exit policy
2248 - Prevent picking middleman nodes as the last node in the circuit
2251 Changes in version 0.0.2pre20 - 2004-01-30
2253 - We now have a deb package, and it's in debian unstable. Go to
2255 - I've split the TotalBandwidth option into BandwidthRate (how many
2256 bytes per second you want to allow, long-term) and
2257 BandwidthBurst (how many bytes you will allow at once before the cap
2258 kicks in). This better token bucket approach lets you, say, set
2259 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
2260 performance while not exceeding your monthly bandwidth quota.
2261 - Push out a tls record's worth of data once you've got it, rather
2262 than waiting until you've read everything waiting to be read. This
2263 may improve performance by pipelining better. We'll see.
2264 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
2265 from failed circuits (if they haven't been connected yet) and attach
2267 - Expire old streams that haven't managed to connect. Some day we'll
2268 have them reattach to new circuits instead.
2271 - Fix several memory leaks that were causing servers to become bloated
2273 - Fix a few very rare assert triggers. A few more remain.
2274 - Setuid to User _before_ complaining about running as root.
2277 Changes in version 0.0.2pre19 - 2004-01-07
2279 - Fix deadlock condition in dns farm. We were telling a child to die by
2280 closing the parent's file descriptor to him. But newer children were
2281 inheriting the open file descriptor from the parent, and since they
2282 weren't closing it, the socket never closed, so the child never read
2283 eof, so he never knew to exit. Similarly, dns workers were holding
2284 open other sockets, leading to all sorts of chaos.
2285 - New cleaner daemon() code for forking and backgrounding.
2286 - If you log to a file, it now prints an entry at the top of the
2287 logfile so you know it's working.
2288 - The onionskin challenge length was 30 bytes longer than necessary.
2289 - Started to patch up the spec so it's not quite so out of date.
2292 Changes in version 0.0.2pre18 - 2004-01-02
2294 - Fix endian issues with the 'integrity' field in the relay header.
2295 - Fix a potential bug where connections in state
2296 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
2299 Changes in version 0.0.2pre17 - 2003-12-30
2301 - Made --debuglogfile (or any second log file, actually) work.
2302 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
2303 adversary could force us into an infinite loop.
2306 - Each onionskin handshake now includes a hash of the computed key,
2307 to prove the server's identity and help perfect forward secrecy.
2308 - Changed cell size from 256 to 512 bytes (working toward compatibility
2310 - Changed cell length to 2 bytes, and moved it to the relay header.
2311 - Implemented end-to-end integrity checking for the payloads of
2313 - Separated streamid from 'recognized' (otherwise circuits will get
2314 messed up when we try to have streams exit from the middle). We
2315 use the integrity-checking to confirm that a cell is addressed to
2317 - Randomize the initial circid and streamid values, so an adversary who
2318 breaks into a node can't learn how many circuits or streams have
2322 Changes in version 0.0.2pre16 - 2003-12-14
2324 - Fixed a bug that made HUP trigger an assert
2325 - Fixed a bug where a circuit that immediately failed wasn't being
2326 counted as a failed circuit in counting retries.
2329 - Now we close the circuit when we get a truncated cell: otherwise we're
2330 open to an anonymity attack where a bad node in the path truncates
2331 the circuit and then we open streams at him.
2332 - Add port ranges to exit policies
2333 - Add a conservative default exit policy
2334 - Warn if you're running tor as root
2335 - on HUP, retry OR connections and close/rebind listeners
2336 - options.EntryNodes: try these nodes first when picking the first node
2337 - options.ExitNodes: if your best choices happen to include any of
2338 your preferred exit nodes, you choose among just those preferred
2340 - options.ExcludedNodes: nodes that are never picked in path building
2343 Changes in version 0.0.2pre15 - 2003-12-03
2344 o Robustness and bugfixes:
2345 - Sometimes clients would cache incorrect DNS resolves, which would
2346 really screw things up.
2347 - An OP that goes offline would slowly leak all its sockets and stop
2349 - A wide variety of bugfixes in exit node selection, exit policy
2350 handling, and processing pending streams when a new circuit is
2352 - Pick nodes for a path only from those the directory says are up
2353 - Choose randomly from all running dirservers, not always the first one
2354 - Increase allowed http header size for directory fetch.
2355 - Stop writing to stderr (if we're daemonized it will be closed).
2356 - Enable -g always, so cores will be more useful to me.
2357 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
2360 - Wrote a man page. It lists commonly used options.
2363 - Change default loglevel to warn.
2364 - Make PidFile default to null rather than littering in your CWD.
2365 - OnionRouter config option is now obsolete. Instead it just checks
2367 - Moved to a single unified torrc file for both clients and servers.
2370 Changes in version 0.0.2pre14 - 2003-11-29
2371 o Robustness and bugfixes:
2372 - Force the admin to make the DataDirectory himself
2373 - to get ownership/permissions right
2374 - so clients no longer make a DataDirectory and then never use it
2375 - fix bug where a client who was offline for 45 minutes would never
2376 pull down a directory again
2377 - fix (or at least hide really well) the dns assert bug that was
2378 causing server crashes
2379 - warnings and improved robustness wrt clockskew for certs
2380 - use the native daemon(3) to daemonize, when available
2381 - exit if bind() fails
2382 - exit if neither socksport nor orport is defined
2383 - include our own tor_timegm (Win32 doesn't have its own)
2384 - bugfix for win32 with lots of connections
2385 - fix minor bias in PRNG
2386 - make dirserver more robust to corrupt cached directory
2389 - Wrote the design document (woo)
2391 o Circuit building and exit policies:
2392 - Circuits no longer try to use nodes that the directory has told them
2394 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
2395 bitcounts (18.0.0.0/8).
2396 - Make AP connections standby for a circuit if no suitable circuit
2397 exists, rather than failing
2398 - Circuits choose exit node based on addr/port, exit policies, and
2399 which AP connections are standing by
2400 - Bump min pathlen from 2 to 3
2401 - Relay end cells have a payload to describe why the stream ended.
2402 - If the stream failed because of exit policy, try again with a new
2404 - Clients have a dns cache to remember resolved addresses.
2405 - Notice more quickly when we have no working circuits
2408 - APPort is now called SocksPort
2409 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
2411 - RecommendedVersions is now a config variable rather than
2412 hardcoded (for dirservers)
2413 - Reloads config on HUP
2414 - Usage info on -h or --help
2415 - If you set User and Group config vars, it'll setu/gid to them.
2417 Changes in version 0.0.2pre13 - 2003-10-19
2418 o General stability:
2419 - SSL_write no longer fails when it returns WANTWRITE and the number
2420 of bytes in the buf has changed by the next SSL_write call.
2421 - Fix segfault fetching directory when network is down
2422 - Fix a variety of minor memory leaks
2423 - Dirservers reload the fingerprints file on HUP, so I don't have
2424 to take down the network when I approve a new router
2425 - Default server config file has explicit Address line to specify fqdn
2428 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
2429 - Make listener connections not ever alloc bufs
2431 o Autoconf improvements:
2432 - don't clobber an external CFLAGS in ./configure
2433 - Make install now works
2434 - create var/lib/tor on make install
2435 - autocreate a tor.sh initscript to help distribs
2436 - autocreate the torrc and sample-server-torrc with correct paths
2438 o Log files and Daemonizing now work:
2439 - If --DebugLogFile is specified, log to it at -l debug
2440 - If --LogFile is specified, use it instead of commandline
2441 - If --RunAsDaemon is set, tor forks and backgrounds on startup