1 Changes in version 0.2.0.15-alpha - 2008-01-??
3 - Fix configure.in logic for cross-compilation.
4 - When we load a bridge descriptor from the cache, and it was
5 previously unreachable, mark it as retriable so we won't just
6 ignore it. Also, try fetching a new copy immediately. Bugfixes
10 - Support compilation to target iPhone; patch from cjacker huang.
11 To build for iPhone, pass the --enable-iphone option to configure.
14 Changes in version 0.2.0.14-alpha - 2007-12-23
16 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
17 without a datadirectory from a previous Tor install. Reported
19 - Fix a crash when we fetch a descriptor that turns out to be
20 unexpected (it used to be in our networkstatus when we started
21 fetching it, but it isn't in our current networkstatus), and we
22 aren't using bridges. Bugfix on 0.2.0.x.
23 - Fix a crash when accessing hidden services: it would work the first
24 time you use a given introduction point for your service, but
25 on subsequent requests we'd be using garbage memory. Fixed by
26 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
27 - Fix a crash when we load a bridge descriptor from disk but we don't
28 currently have a Bridge line for it in our torrc. Bugfix on
32 - If bridge authorities set BridgePassword, they will serve a
33 snapshot of known bridge routerstatuses from their DirPort to
34 anybody who knows that password. Unset by default.
37 - Make the unit tests build again.
38 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
39 - Make PublishServerDescriptor default to 1, so the default doesn't
40 have to change as we invent new directory protocol versions.
41 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
42 be included unless sys/time.h is already included. Fixes
43 bug 553. Bugfix on 0.2.0.x.
44 - If we receive a general-purpose descriptor and then receive an
45 identical bridge-purpose descriptor soon after, don't discard
46 the next one as a duplicate.
49 - If BridgeRelay is set to 1, then the default for
50 PublishServerDescriptor is now "bridge" rather than "v2,v3".
51 - If the user sets RelayBandwidthRate but doesn't set
52 RelayBandwidthBurst, then make them equal rather than erroring out.
55 Changes in version 0.2.0.13-alpha - 2007-12-21
56 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
57 Goodell, fixes many more bugs, and adds a lot of infrastructure for
60 o New directory authorities:
61 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
65 - Only update guard status (usable / not usable) once we have
66 enough directory information. This was causing us to always pick
67 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
68 causing us to discard all our guards on startup if we hadn't been
69 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
70 - Purge old entries from the "rephist" database and the hidden
71 service descriptor databases even when DirPort is zero. Bugfix
73 - We were ignoring our RelayBandwidthRate for the first 30 seconds
74 after opening a circuit -- even a relayed circuit. Bugfix on
76 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
77 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
78 crashing or mis-answering these types of requests.
79 - Relays were publishing their server descriptor to v1 and v2
80 directory authorities, but they didn't try publishing to v3-only
81 authorities. Fix this; and also stop publishing to v1 authorities.
83 - When we were reading router descriptors from cache, we were ignoring
84 the annotations -- so for example we were reading in bridge-purpose
85 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
86 - When we decided to send a 503 response to a request for servers, we
87 were then also sending the server descriptors: this defeats the
88 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
91 - Bridge relays now behave like clients with respect to time
92 intervals for downloading new consensus documents -- otherwise they
93 stand out. Bridge users now wait until the end of the interval,
94 so their bridge relay will be sure to have a new consensus document.
95 - Three new config options (AlternateDirAuthority,
96 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
97 user selectively replace the default directory authorities by type,
98 rather than the all-or-nothing replacement that DirServer offers.
99 - Tor can now be configured to read a GeoIP file from disk in one
100 of two formats. This can be used by controllers to map IP addresses
101 to countries. Eventually, it may support exit-by-country.
102 - When possible, bridge relays remember which countries users
103 are coming from, and report aggregate information in their
104 extra-info documents, so that the bridge authorities can learn
105 where Tor is blocked.
106 - Bridge directory authorities now do reachability testing on the
107 bridges they know. They provide router status summaries to the
108 controller via "getinfo ns/purpose/bridge", and also dump summaries
109 to a file periodically.
110 - Stop fetching directory info so aggressively if your DirPort is
111 on but your ORPort is off; stop fetching v2 dir info entirely.
112 You can override these choices with the new FetchDirInfoEarly
116 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
117 consensus documents when there are too many relays at a single
118 IP address. Now clear it in v2 network status documents too, and
119 also clear it in routerinfo_t when the relay is no longer listed
120 in the relevant networkstatus document.
121 - Don't crash if we get an unexpected value for the
122 PublishServerDescriptor config option. Reported by Matt Edman;
123 bugfix on 0.2.0.9-alpha.
124 - Our new v2 hidden service descriptor format allows descriptors
125 that have no introduction points. But Tor crashed when we tried
126 to build a descriptor with no intro points (and it would have
127 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
129 - Fix building with dmalloc 5.5.2 with glibc.
130 - Reject uploaded descriptors and extrainfo documents if they're
131 huge. Otherwise we'll cache them all over the network and it'll
132 clog everything up. Reported by Aljosha Judmayer.
133 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
134 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
135 - When the DANGEROUS_VERSION controller status event told us we're
136 running an obsolete version, it used the string "OLD" to describe
137 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
138 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
139 - If we can't expand our list of entry guards (e.g. because we're
140 using bridges or we have StrictEntryNodes set), don't mark relays
141 down when they fail a directory request. Otherwise we're too quick
142 to mark all our entry points down. Bugfix on 0.1.2.x.
143 - Fix handling of hex nicknames when answering controller requests for
144 networkstatus by name, or when deciding whether to warn about unknown
145 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
146 - Fix a couple of hard-to-trigger autoconf problems that could result
147 in really weird results on platforms whose sys/types.h files define
148 nonstandard integer types. Bugfix on 0.1.2.x.
149 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
150 - Don't crash on name lookup when we have no current consensus. Fixes
151 bug 538; bugfix on 0.2.0.x.
152 - Only Tors that want to mirror the v2 directory info should
153 create the "cached-status" directory in their datadir. (All Tors
154 used to create it.) Bugfix on 0.2.0.9-alpha.
155 - Directory authorities should only automatically download Extra Info
156 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
159 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
160 consumers. (We already do this on HUP.)
161 - Authorities and caches fetch the v2 networkstatus documents
162 less often, now that v3 is encouraged.
163 - Add a new config option BridgeRelay that specifies you want to
164 be a bridge relay. Right now the only difference is that it makes
165 you answer begin_dir requests, and it makes you cache dir info,
166 even if your DirPort isn't on.
167 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
168 ask about source, timestamp of arrival, purpose, etc. We need
169 something like this to help Vidalia not do GeoIP lookups on bridge
171 - Allow multiple HashedControlPassword config lines, to support
172 multiple controller passwords.
173 - Authorities now decide whether they're authoritative for a given
174 router based on the router's purpose.
175 - New config options AuthDirBadDir and AuthDirListBadDirs for
176 authorities to mark certain relays as "bad directories" in the
177 networkstatus documents. Also supports the "!baddir" directive in
178 the approved-routers file.
181 Changes in version 0.2.0.12-alpha - 2007-11-16
182 This twelfth development snapshot fixes some more build problems as
183 well as a few minor bugs.
186 - Make it build on OpenBSD again. Patch from tup.
187 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
188 package-building for Red Hat, OS X, etc.
190 o Minor bugfixes (on 0.1.2.x):
191 - Changing the ExitPolicyRejectPrivate setting should cause us to
192 rebuild our server descriptor.
194 o Minor bugfixes (on 0.2.0.x):
195 - When we're lacking a consensus, don't try to perform rendezvous
196 operations. Reported by Karsten Loesing.
197 - Fix a small memory leak whenever we decide against using a
198 newly picked entry guard. Reported by Mike Perry.
199 - When authorities detected more than two relays running on the same
200 IP address, they were clearing all the status flags but forgetting
201 to clear the "hsdir" flag. So clients were being told that a
202 given relay was the right choice for a v2 hsdir lookup, yet they
203 never had its descriptor because it was marked as 'not running'
205 - If we're trying to fetch a bridge descriptor and there's no way
206 the bridge authority could help us (for example, we don't know
207 a digest, or there is no bridge authority), don't be so eager to
208 fall back to asking the bridge authority.
209 - If we're using bridges or have strictentrynodes set, and our
210 chosen exit is in the same family as all our bridges/entry guards,
211 then be flexible about families.
214 - When we negotiate a v2 link-layer connection (not yet implemented),
215 accept RELAY_EARLY cells and turn them into RELAY cells if we've
216 negotiated a v1 connection for their next step. Initial code for
220 Changes in version 0.2.0.11-alpha - 2007-11-12
221 This eleventh development snapshot fixes some build problems with
222 the previous snapshot. It also includes a more secure-by-default exit
223 policy for relays, fixes an enormous memory leak for exit relays, and
224 fixes another bug where servers were falling out of the directory list.
227 - Exit policies now reject connections that are addressed to a
228 relay's public (external) IP address too, unless
229 ExitPolicyRejectPrivate is turned off. We do this because too
230 many relays are running nearby to services that trust them based
231 on network address. Bugfix on 0.1.2.x.
234 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
235 on every successful resolve. Reported by Mike Perry; bugfix
237 - On authorities, never downgrade to old router descriptors simply
238 because they're listed in the consensus. This created a catch-22
239 where we wouldn't list a new descriptor because there was an
240 old one in the consensus, and we couldn't get the new one in the
241 consensus because we wouldn't list it. Possible fix for bug 548.
242 Also, this might cause bug 543 to appear on authorities; if so,
243 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
245 o Packaging fixes on 0.2.0.10-alpha:
246 - We were including instructions about what to do with the
247 src/config/fallback-consensus file, but we weren't actually
248 including it in the tarball. Disable all of that for now.
251 - Allow people to say PreferTunnelledDirConns rather than
252 PreferTunneledDirConns, for those alternate-spellers out there.
255 - Don't reevaluate all the information from our consensus document
256 just because we've downloaded a v2 networkstatus that we intend
257 to cache. Fixes bug 545; bugfix on 0.2.0.x.
260 Changes in version 0.2.0.10-alpha - 2007-11-10
261 This tenth development snapshot adds a third v3 directory authority
262 run by Mike Perry, adds most of Karsten Loesing's new hidden service
263 descriptor format, fixes a bad crash bug and new bridge bugs introduced
264 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
265 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
266 addresses many more minor issues.
268 o New directory authorities:
269 - Set up ides (run by Mike Perry) as the third v3 directory authority.
272 - Allow tunnelled directory connections to ask for an encrypted
273 "begin_dir" connection or an anonymized "uses a full Tor circuit"
274 connection independently. Now we can make anonymized begin_dir
275 connections for (e.g.) more secure hidden service posting and
277 - More progress on proposal 114: code from Karsten Loesing to
278 implement new hidden service descriptor format.
279 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
280 accommodate the growing number of servers that use the default
282 - Directory authorities use a new formula for selecting which nodes
283 to advertise as Guards: they must be in the top 7/8 in terms of
284 how long we have known about them, and above the median of those
285 nodes in terms of weighted fractional uptime.
286 - Make "not enough dir info yet" warnings describe *why* Tor feels
287 it doesn't have enough directory info yet.
290 - Stop servers from crashing if they set a Family option (or
291 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
293 - Make bridge users work again -- the move to v3 directories in
294 0.2.0.9-alpha had introduced a number of bugs that made bridges
295 no longer work for clients.
296 - When the clock jumps forward a lot, do not allow the bandwidth
297 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
299 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
300 - When the consensus lists a router descriptor that we previously were
301 mirroring, but that we considered non-canonical, reload the
302 descriptor as canonical. This fixes bug 543 where Tor servers
303 would start complaining after a few days that they don't have
304 enough directory information to build a circuit.
305 - Consider replacing the current consensus when certificates arrive
306 that make the pending consensus valid. Previously, we were only
307 considering replacement when the new certs _didn't_ help.
308 - Fix an assert error on startup if we didn't already have the
309 consensus and certs cached in our datadirectory: we were caching
310 the consensus in consensus_waiting_for_certs but then free'ing it
312 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
313 Request) if we need more v3 certs but we've already got pending
314 requests for all of them.
315 - Correctly back off from failing certificate downloads. Fixes
317 - Authorities don't vote on the Running flag if they have been running
318 for less than 30 minutes themselves. Fixes bug 547, where a newly
319 started authority would vote that everyone was down.
322 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
323 it, it had no AES, and it hasn't seen any security patches since
327 - Clients now hold circuitless TLS connections open for 1.5 times
328 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
329 rebuild a new circuit over them within that timeframe. Previously,
330 they held them open only for KeepalivePeriod (5 minutes).
331 - Use "If-Modified-Since" to avoid retrieving consensus
332 networkstatuses that we already have.
333 - When we have no consensus, check FallbackNetworkstatusFile (defaults
334 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
335 we start knowing some directory caches.
336 - When we receive a consensus from the future, warn about skew.
337 - Improve skew reporting: try to give the user a better log message
338 about how skewed they are, and how much this matters.
339 - When we have a certificate for an authority, believe that
340 certificate's claims about the authority's IP address.
341 - New --quiet command-line option to suppress the default console log.
342 Good in combination with --hash-password.
343 - Authorities send back an X-Descriptor-Not-New header in response to
344 an accepted-but-discarded descriptor upload. Partially implements
346 - Make the log message for "tls error. breaking." more useful.
347 - Better log messages about certificate downloads, to attempt to
348 track down the second incarnation of bug 546.
350 o Minor features (bridges):
351 - If bridge users set UpdateBridgesFromAuthority, but the digest
352 they ask for is a 404 from the bridge authority, they now fall
353 back to trying the bridge directly.
354 - Bridges now use begin_dir to publish their server descriptor to
355 the bridge authority, even when they haven't set TunnelDirConns.
357 o Minor features (controller):
358 - When reporting clock skew, and we know that the clock is _at least
359 as skewed_ as some value, but we don't know the actual value,
360 report the value as a "minimum skew."
363 - Update linux-tor-prio.sh script to allow QoS based on the uid of
364 the Tor process. Patch from Marco Bonetti with tweaks from Mike
368 - Refuse to start if both ORPort and UseBridges are set. Bugfix
369 on 0.2.0.x, suggested by Matt Edman.
370 - Don't stop fetching descriptors when FetchUselessDescriptors is
371 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
372 reported by tup and ioerror.
373 - Better log message on vote from unknown authority.
374 - Don't log "Launching 0 request for 0 router" message.
376 o Minor bugfixes (memory leaks):
377 - Stop leaking memory every time we parse a v3 certificate. Bugfix
379 - Stop leaking memory every time we load a v3 certificate. Bugfix
380 on 0.2.0.1-alpha. Fixes Bug 536.
381 - Stop leaking a cached networkstatus on exit. Bugfix on
383 - Stop leaking voter information every time we free a consensus.
384 Bugfix on 0.2.0.3-alpha.
385 - Stop leaking signed data every time we check a voter signature.
386 Bugfix on 0.2.0.3-alpha.
387 - Stop leaking a signature every time we fail to parse a consensus or
388 a vote. Bugfix on 0.2.0.3-alpha.
389 - Stop leaking v2_download_status_map on shutdown. Bugfix on
391 - Stop leaking conn->nickname every time we make a connection to a
392 Tor relay without knowing its expected identity digest (e.g. when
393 using bridges). Bugfix on 0.2.0.3-alpha.
395 - Minor bugfixes (portability):
396 - Run correctly on platforms where rlim_t is larger than unsigned
397 long, and/or where the real limit for number of open files is
398 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
399 particular, these may be needed for OS X 10.5.
402 Changes in version 0.1.2.18 - 2007-10-28
403 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
404 hidden service introduction that were causing huge delays, and a big
405 bug that was causing some servers to disappear from the network status
406 lists for a few hours each day.
408 o Major bugfixes (crashes):
409 - If a connection is shut down abruptly because of something that
410 happened inside connection_flushed_some(), do not call
411 connection_finished_flushing(). Should fix bug 451:
412 "connection_stop_writing: Assertion conn->write_event failed"
413 Bugfix on 0.1.2.7-alpha.
414 - Fix possible segfaults in functions called from
415 rend_process_relay_cell().
417 o Major bugfixes (hidden services):
418 - Hidden services were choosing introduction points uniquely by
419 hexdigest, but when constructing the hidden service descriptor
420 they merely wrote the (potentially ambiguous) nickname.
421 - Clients now use the v2 intro format for hidden service
422 connections: they specify their chosen rendezvous point by identity
423 digest rather than by (potentially ambiguous) nickname. These
424 changes could speed up hidden service connections dramatically.
426 o Major bugfixes (other):
427 - Stop publishing a new server descriptor just because we get a
428 HUP signal. This led (in a roundabout way) to some servers getting
429 dropped from the networkstatus lists for a few hours each day.
430 - When looking for a circuit to cannibalize, consider family as well
431 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
432 circuit cannibalization).
433 - When a router wasn't listed in a new networkstatus, we were leaving
434 the flags for that router alone -- meaning it remained Named,
435 Running, etc -- even though absence from the networkstatus means
436 that it shouldn't be considered to exist at all anymore. Now we
437 clear all the flags for routers that fall out of the networkstatus
438 consensus. Fixes bug 529.
441 - Don't try to access (or alter) the state file when running
442 --list-fingerprint or --verify-config or --hash-password. Resolves
444 - When generating information telling us how to extend to a given
445 router, do not try to include the nickname if it is
446 absent. Resolves bug 467.
447 - Fix a user-triggerable segfault in expand_filename(). (There isn't
448 a way to trigger this remotely.)
449 - When sending a status event to the controller telling it that an
450 OR address is readable, set the port correctly. (Previously we
451 were reporting the dir port.)
452 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
453 command. Bugfix on 0.1.2.17.
454 - When loading bandwidth history, do not believe any information in
455 the future. Fixes bug 434.
456 - When loading entry guard information, do not believe any information
458 - When we have our clock set far in the future and generate an
459 onion key, then re-set our clock to be correct, we should not stop
460 the onion key from getting rotated.
461 - On some platforms, accept() can return a broken address. Detect
462 this more quietly, and deal accordingly. Fixes bug 483.
463 - It's not actually an error to find a non-pending entry in the DNS
464 cache when canceling a pending resolve. Don't log unless stuff
465 is fishy. Resolves bug 463.
466 - Don't reset trusted dir server list when we set a configuration
467 option. Patch from Robert Hogan.
468 - Don't try to create the datadir when running --verify-config or
469 --hash-password. Resolves bug 540.
472 Changes in version 0.2.0.9-alpha - 2007-10-24
473 This ninth development snapshot switches clients to the new v3 directory
474 system; allows servers to be listed in the network status even when they
475 have the same nickname as a registered server; and fixes many other
476 bugs including a big one that was causing some servers to disappear
477 from the network status lists for a few hours each day.
479 o Major features (directory system):
480 - Clients now download v3 consensus networkstatus documents instead
481 of v2 networkstatus documents. Clients and caches now base their
482 opinions about routers on these consensus documents. Clients only
483 download router descriptors listed in the consensus.
484 - Authorities now list servers who have the same nickname as
485 a different named server, but list them with a new flag,
486 "Unnamed". Now we can list servers that happen to pick the same
487 nickname as a server that registered two years ago and then
488 disappeared. Partially implements proposal 122.
489 - If the consensus list a router as "Unnamed", the name is assigned
490 to a different router: do not identify the router by that name.
491 Partially implements proposal 122.
492 - Authorities can now come to a consensus on which method to use to
493 compute the consensus. This gives us forward compatibility.
496 - Stop publishing a new server descriptor just because we HUP or
497 when we find our DirPort to be reachable but won't actually publish
498 it. New descriptors without any real changes are dropped by the
499 authorities, and can screw up our "publish every 18 hours" schedule.
501 - When a router wasn't listed in a new networkstatus, we were leaving
502 the flags for that router alone -- meaning it remained Named,
503 Running, etc -- even though absence from the networkstatus means
504 that it shouldn't be considered to exist at all anymore. Now we
505 clear all the flags for routers that fall out of the networkstatus
506 consensus. Fixes bug 529; bugfix on 0.1.2.x.
507 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
508 extrainfo documents and then discard them immediately for not
509 matching the latest router. Bugfix on 0.2.0.1-alpha.
511 o Minor features (v3 directory protocol):
512 - Allow tor-gencert to generate a new certificate without replacing
514 - Allow certificates to include an address.
515 - When we change our directory-cache settings, reschedule all voting
516 and download operations.
517 - Reattempt certificate downloads immediately on failure, as long as
518 we haven't failed a threshold number of times yet.
519 - Delay retrying consensus downloads while we're downloading
520 certificates to verify the one we just got. Also, count getting a
521 consensus that we already have (or one that isn't valid) as a failure,
522 and count failing to get the certificates after 20 minutes as a
524 - Build circuits and download descriptors even if our consensus is a
525 little expired. (This feature will go away once authorities are
528 o Minor features (router descriptor cache):
529 - If we find a cached-routers file that's been sitting around for more
530 than 28 days unmodified, then most likely it's a leftover from
531 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
533 - When we (as a cache) download a descriptor because it was listed
534 in a consensus, remember when the consensus was supposed to expire,
535 and don't expire the descriptor until then.
537 o Minor features (performance):
538 - Call routerlist_remove_old_routers() much less often. This should
539 speed startup, especially on directory caches.
540 - Don't try to launch new descriptor downloads quite so often when we
541 already have enough directory information to build circuits.
542 - Base64 decoding was actually showing up on our profile when parsing
543 the initial descriptor file; switch to an in-process all-at-once
544 implementation that's about 3.5x times faster than calling out to
547 o Minor features (compilation):
548 - Detect non-ASCII platforms (if any still exist) and refuse to
549 build there: some of our code assumes that 'A' is 65 and so on.
551 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
552 - Make the "next period" votes into "current period" votes immediately
553 after publishing the consensus; avoid a heisenbug that made them
554 stick around indefinitely.
555 - When we discard a vote as a duplicate, do not report this as
557 - Treat missing v3 keys or certificates as an error when running as a
558 v3 directory authority.
559 - When we're configured to be a v3 authority, but we're only listed
560 as a non-v3 authority in our DirServer line for ourself, correct
562 - If an authority doesn't have a qualified hostname, just put
563 its address in the vote. This fixes the problem where we referred to
564 "moria on moria:9031."
565 - Distinguish between detached signatures for the wrong period, and
566 detached signatures for a divergent vote.
567 - Fix a small memory leak when computing a consensus.
568 - When there's no concensus, we were forming a vote every 30
569 minutes, but writing the "valid-after" line in our vote based
570 on our configured V3AuthVotingInterval: so unless the intervals
571 matched up, we immediately rejected our own vote because it didn't
572 start at the voting interval that caused us to construct a vote.
574 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
575 - Delete unverified-consensus when the real consensus is set.
576 - Consider retrying a consensus networkstatus fetch immediately
577 after one fails: don't wait 60 seconds to notice.
578 - When fetching a consensus as a cache, wait until a newer consensus
579 should exist before trying to replace the current one.
580 - Use a more forgiving schedule for retrying failed consensus
581 downloads than for other types.
583 o Minor bugfixes (other directory issues):
584 - Correct the implementation of "download votes by digest." Bugfix on
586 - Authorities no longer send back "400 you're unreachable please fix
587 it" errors to Tor servers that aren't online all the time. We're
588 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
590 o Minor bugfixes (controller):
591 - Don't reset trusted dir server list when we set a configuration
592 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
593 - Respond to INT and TERM SIGNAL commands before we execute the
594 signal, in case the signal shuts us down. We had a patch in
595 0.1.2.1-alpha that tried to do this by queueing the response on
596 the connection's buffer before shutting down, but that really
597 isn't the same thing at all. Bug located by Matt Edman.
599 o Minor bugfixes (misc):
600 - Correctly check for bad options to the "PublishServerDescriptor"
601 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
602 - Stop leaking memory on failing case of base32_decode, and make
603 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
604 - Don't try to download extrainfo documents when we're trying to
605 fetch enough directory info to build a circuit: having enough
606 info should get priority. Bugfix on 0.2.0.x.
607 - Don't complain that "your server has not managed to confirm that its
608 ports are reachable" if we haven't been able to build any circuits
609 yet. Bug found by spending four hours without a v3 consensus. Bugfix
611 - Detect the reason for failing to mmap a descriptor file we just
612 wrote, and give a more useful log message. Fixes bug 533. Bugfix
615 o Code simplifications and refactoring:
616 - Remove support for the old bw_accounting file: we've been storing
617 bandwidth accounting information in the state file since
618 0.1.2.5-alpha. This may result in bandwidth accounting errors
619 if you try to upgrade from 0.1.1.x or earlier, or if you try to
620 downgrade to 0.1.1.x or earlier.
621 - New convenience code to locate a file within the DataDirectory.
622 - Move non-authority functionality out of dirvote.c.
623 - Refactor the arguments for router_pick_{directory_|trusteddir}server
624 so that they all take the same named flags.
627 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
628 Unix users an easy way to script their Tor process (e.g. by
629 adjusting bandwidth based on the time of the day).
632 Changes in version 0.2.0.8-alpha - 2007-10-12
633 This eighth development snapshot fixes a crash bug that's been bothering
634 us since February 2007, lets bridge authorities store a list of bridge
635 descriptors they've seen, gets v3 directory voting closer to working,
636 starts caching v3 directory consensus documents on directory mirrors,
637 and fixes a variety of smaller issues including some minor memory leaks.
639 o Major features (router descriptor cache):
640 - Store routers in a file called cached-descriptors instead of in
641 cached-routers. Initialize cached-descriptors from cached-routers
642 if the old format is around. The new format allows us to store
643 annotations along with descriptors.
644 - Use annotations to record the time we received each descriptor, its
645 source, and its purpose.
646 - Disable the SETROUTERPURPOSE controller command: it is now
648 - Controllers should now specify cache=no or cache=yes when using
649 the +POSTDESCRIPTOR command.
650 - Bridge authorities now write bridge descriptors to disk, meaning
651 we can export them to other programs and begin distributing them
654 o Major features (directory authorities):
655 - When a v3 authority is missing votes or signatures, it now tries
657 - Directory authorities track weighted fractional uptime as well as
658 weighted mean-time-between failures. WFU is suitable for deciding
659 whether a node is "usually up", while MTBF is suitable for deciding
660 whether a node is "likely to stay up." We need both, because
661 "usually up" is a good requirement for guards, while "likely to
662 stay up" is a good requirement for long-lived connections.
664 o Major features (v3 directory system):
665 - Caches now download v3 network status documents as needed,
666 and download the descriptors listed in them.
667 - All hosts now attempt to download and keep fresh v3 authority
668 certificates, and re-attempt after failures.
669 - More internal-consistency checks for vote parsing.
671 o Major bugfixes (crashes):
672 - If a connection is shut down abruptly because of something that
673 happened inside connection_flushed_some(), do not call
674 connection_finished_flushing(). Should fix bug 451. Bugfix on
677 o Major bugfixes (performance):
678 - Fix really bad O(n^2) performance when parsing a long list of
679 routers: Instead of searching the entire list for an "extra-info "
680 string which usually wasn't there, once for every routerinfo
681 we read, just scan lines forward until we find one we like.
683 - When we add data to a write buffer in response to the data on that
684 write buffer getting low because of a flush, do not consider the
685 newly added data as a candidate for immediate flushing, but rather
686 make it wait until the next round of writing. Otherwise, we flush
687 and refill recursively, and a single greedy TLS connection can
688 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
690 o Minor features (v3 authority system):
691 - Add more ways for tools to download the votes that lead to the
693 - Send a 503 when low on bandwidth and a vote, consensus, or
694 certificate is requested.
695 - If-modified-since is now implemented properly for all kinds of
696 certificate requests.
698 o Minor bugfixes (network statuses):
699 - Tweak the implementation of proposal 109 slightly: allow at most
700 two Tor servers on the same IP address, except if it's the location
701 of a directory authority, in which case allow five. Bugfix on
704 o Minor bugfixes (controller):
705 - When sending a status event to the controller telling it that an
706 OR address is reachable, set the port correctly. (Previously we
707 were reporting the dir port.) Bugfix on 0.1.2.x.
709 o Minor bugfixes (v3 directory system):
710 - Fix logic to look up a cert by its signing key digest. Bugfix on
712 - Only change the reply to a vote to "OK" if it's not already
713 set. This gets rid of annoying "400 OK" log messages, which may
714 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
715 - When we get a valid consensus, recompute the voting schedule.
716 - Base the valid-after time of a vote on the consensus voting
717 schedule, not on our preferred schedule.
718 - Make the return values and messages from signature uploads and
719 downloads more sensible.
720 - Fix a memory leak when serving votes and consensus documents, and
721 another when serving certificates.
723 o Minor bugfixes (performance):
724 - Use a slightly simpler string hashing algorithm (copying Python's
725 instead of Java's) and optimize our digest hashing algorithm to take
726 advantage of 64-bit platforms and to remove some possibly-costly
728 - Fix a minor memory leak whenever we parse guards from our state
729 file. Bugfix on 0.2.0.7-alpha.
730 - Fix a minor memory leak whenever we write out a file. Bugfix on
732 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
733 command. Bugfix on 0.2.0.5-alpha.
735 o Minor bugfixes (portability):
736 - On some platforms, accept() can return a broken address. Detect
737 this more quietly, and deal accordingly. Fixes bug 483.
738 - Stop calling tor_strlower() on uninitialized memory in some cases.
739 Bugfix in 0.2.0.7-alpha.
741 o Minor bugfixes (usability):
742 - Treat some 403 responses from directory servers as INFO rather than
743 WARN-severity events.
744 - It's not actually an error to find a non-pending entry in the DNS
745 cache when canceling a pending resolve. Don't log unless stuff is
746 fishy. Resolves bug 463.
748 o Minor bugfixes (anonymity):
749 - Never report that we've used more bandwidth than we're willing to
750 relay: it leaks how much non-relay traffic we're using. Resolves
752 - When looking for a circuit to cannibalize, consider family as well
753 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
754 circuit cannibalization).
756 o Code simplifications and refactoring:
757 - Make a bunch of functions static. Remove some dead code.
758 - Pull out about a third of the really big routerlist.c; put it in a
759 new module, networkstatus.c.
760 - Merge the extra fields in local_routerstatus_t back into
761 routerstatus_t: we used to need one routerstatus_t for each
762 authority's opinion, plus a local_routerstatus_t for the locally
763 computed consensus opinion. To save space, we put the locally
764 modified fields into local_routerstatus_t, and only the common
765 stuff into routerstatus_t. But once v3 directories are in use,
766 clients and caches will no longer need to hold authority opinions;
767 thus, the rationale for keeping the types separate is now gone.
768 - Make the code used to reschedule and reattempt downloads more
770 - Turn all 'Are we a directory server/mirror?' logic into a call to
772 - Remove the code to generate the oldest (v1) directory format.
773 The code has been disabled since 0.2.0.5-alpha.
776 Changes in version 0.2.0.7-alpha - 2007-09-21
777 This seventh development snapshot makes bridges work again, makes bridge
778 authorities work for the first time, fixes two huge performance flaws
779 in hidden services, and fixes a variety of minor issues.
781 o New directory authorities:
782 - Set up moria1 and tor26 as the first v3 directory authorities. See
783 doc/spec/dir-spec.txt for details on the new directory design.
785 o Major bugfixes (crashes):
786 - Fix possible segfaults in functions called from
787 rend_process_relay_cell(). Bugfix on 0.1.2.x.
789 o Major bugfixes (bridges):
790 - Fix a bug that made servers send a "404 Not found" in response to
791 attempts to fetch their server descriptor. This caused Tor servers
792 to take many minutes to establish reachability for their DirPort,
793 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
794 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
795 users configure that and specify a bridge with an identity
796 fingerprint, now they will lookup the bridge descriptor at the
797 default bridge authority via a one-hop tunnel, but once circuits
798 are established they will switch to a three-hop tunnel for later
799 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
801 o Major bugfixes (hidden services):
802 - Hidden services were choosing introduction points uniquely by
803 hexdigest, but when constructing the hidden service descriptor
804 they merely wrote the (potentially ambiguous) nickname.
805 - Clients now use the v2 intro format for hidden service
806 connections: they specify their chosen rendezvous point by identity
807 digest rather than by (potentially ambiguous) nickname. Both
808 are bugfixes on 0.1.2.x, and they could speed up hidden service
809 connections dramatically. Thanks to Karsten Loesing.
811 o Minor features (security):
812 - As a client, do not believe any server that tells us that an
813 address maps to an internal address space.
814 - Make it possible to enable HashedControlPassword and
815 CookieAuthentication at the same time.
817 o Minor features (guard nodes):
818 - Tag every guard node in our state file with the version that
819 we believe added it, or with our own version if we add it. This way,
820 if a user temporarily runs an old version of Tor and then switches
821 back to a new one, she doesn't automatically lose her guards.
823 o Minor features (speed):
824 - When implementing AES counter mode, update only the portions of the
825 counter buffer that need to change, and don't keep separate
826 network-order and host-order counters when they are the same (i.e.,
827 on big-endian hosts.)
829 o Minor features (controller):
830 - Accept LF instead of CRLF on controller, since some software has a
831 hard time generating real Internet newlines.
832 - Add GETINFO values for the server status events
833 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
837 - Routers no longer include bandwidth-history lines in their
838 descriptors; this information is already available in extra-info
839 documents, and including it in router descriptors took up 60%
840 (!) of compressed router descriptor downloads. Completes
841 implementation of proposal 104.
842 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
843 and TorControl.py, as they use the old v0 controller protocol,
844 and are obsoleted by TorFlow anyway.
845 - Drop support for v1 rendezvous descriptors, since we never used
846 them anyway, and the code has probably rotted by now. Based on
847 patch from Karsten Loesing.
848 - On OSX, stop warning the user that kqueue support in libevent is
849 "experimental", since it seems to have worked fine for ages.
852 - When generating information telling us how to extend to a given
853 router, do not try to include the nickname if it is absent. Fixes
854 bug 467. Bugfix on 0.2.0.3-alpha.
855 - Fix a user-triggerable (but not remotely-triggerable) segfault
856 in expand_filename(). Bugfix on 0.1.2.x.
857 - Fix a memory leak when freeing incomplete requests from DNSPort.
858 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
859 - Don't try to access (or alter) the state file when running
860 --list-fingerprint or --verify-config or --hash-password. (Resolves
861 bug 499.) Bugfix on 0.1.2.x.
862 - Servers used to decline to publish their DirPort if their
863 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
864 were below a threshold. Now they only look at BandwidthRate and
865 RelayBandwidthRate. Bugfix on 0.1.2.x.
866 - Remove an optimization in the AES counter-mode code that assumed
867 that the counter never exceeded 2^68. When the counter can be set
868 arbitrarily as an IV (as it is by Karsten's new hidden services
869 code), this assumption no longer holds. Bugfix on 0.1.2.x.
870 - Resume listing "AUTHORITY" flag for authorities in network status.
871 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
873 o Code simplifications and refactoring:
874 - Revamp file-writing logic so we don't need to have the entire
875 contents of a file in memory at once before we write to disk. Tor,
877 - Turn "descriptor store" into a full-fledged type.
878 - Move all NT services code into a separate source file.
879 - Unify all code that computes medians, percentile elements, etc.
880 - Get rid of a needless malloc when parsing address policies.
883 Changes in version 0.1.2.17 - 2007-08-30
884 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
885 X bundles. Vidalia 0.0.14 makes authentication required for the
886 ControlPort in the default configuration, which addresses important
887 security risks. Everybody who uses Vidalia (or another controller)
890 In addition, this Tor update fixes major load balancing problems with
891 path selection, which should speed things up a lot once many people
894 o Major bugfixes (security):
895 - We removed support for the old (v0) control protocol. It has been
896 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
897 become more of a headache than it's worth.
899 o Major bugfixes (load balancing):
900 - When choosing nodes for non-guard positions, weight guards
901 proportionally less, since they already have enough load. Patch
903 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
904 will allow fast Tor servers to get more attention.
905 - When we're upgrading from an old Tor version, forget our current
906 guards and pick new ones according to the new weightings. These
907 three load balancing patches could raise effective network capacity
908 by a factor of four. Thanks to Mike Perry for measurements.
910 o Major bugfixes (stream expiration):
911 - Expire not-yet-successful application streams in all cases if
912 they've been around longer than SocksTimeout. Right now there are
913 some cases where the stream will live forever, demanding a new
914 circuit every 15 seconds. Fixes bug 454; reported by lodger.
916 o Minor features (controller):
917 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
918 is valid before any authentication has been received. It tells
919 a controller what kind of authentication is expected, and what
920 protocol is spoken. Implements proposal 119.
922 o Minor bugfixes (performance):
923 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
924 greatly speeding up loading cached-routers from disk on startup.
925 - Disable sentinel-based debugging for buffer code: we squashed all
926 the bugs that this was supposed to detect a long time ago, and now
927 its only effect is to change our buffer sizes from nice powers of
928 two (which platform mallocs tend to like) to values slightly over
929 powers of two (which make some platform mallocs sad).
931 o Minor bugfixes (misc):
932 - If exit bandwidth ever exceeds one third of total bandwidth, then
933 use the correct formula to weight exit nodes when choosing paths.
934 Based on patch from Mike Perry.
935 - Choose perfectly fairly among routers when choosing by bandwidth and
936 weighting by fraction of bandwidth provided by exits. Previously, we
937 would choose with only approximate fairness, and correct ourselves
938 if we ran off the end of the list.
939 - If we require CookieAuthentication but we fail to write the
940 cookie file, we would warn but not exit, and end up in a state
941 where no controller could authenticate. Now we exit.
942 - If we require CookieAuthentication, stop generating a new cookie
943 every time we change any piece of our config.
944 - Refuse to start with certain directory authority keys, and
945 encourage people using them to stop.
946 - Terminate multi-line control events properly. Original patch
948 - Fix a minor memory leak when we fail to find enough suitable
949 servers to choose a circuit.
950 - Stop leaking part of the descriptor when we run into a particularly
951 unparseable piece of it.
954 Changes in version 0.2.0.6-alpha - 2007-08-26
955 This sixth development snapshot features a new Vidalia version in the
956 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
957 the ControlPort in the default configuration, which addresses important
960 In addition, this snapshot fixes major load balancing problems
961 with path selection, which should speed things up a lot once many
962 people have upgraded. The directory authorities also use a new
963 mean-time-between-failure approach to tracking which servers are stable,
964 rather than just looking at the most recent uptime.
966 o New directory authorities:
967 - Set up Tonga as the default bridge directory authority.
970 - Directory authorities now track servers by weighted
971 mean-times-between-failures. When we have 4 or more days of data,
972 use measured MTBF rather than declared uptime to decide whether
973 to call a router Stable. Implements proposal 108.
975 o Major bugfixes (load balancing):
976 - When choosing nodes for non-guard positions, weight guards
977 proportionally less, since they already have enough load. Patch
979 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
980 will allow fast Tor servers to get more attention.
981 - When we're upgrading from an old Tor version, forget our current
982 guards and pick new ones according to the new weightings. These
983 three load balancing patches could raise effective network capacity
984 by a factor of four. Thanks to Mike Perry for measurements.
986 o Major bugfixes (descriptor parsing):
987 - Handle unexpected whitespace better in malformed descriptors. Bug
988 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
991 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
992 GETINFO for Torstat to use until it can switch to using extrainfos.
993 - Optionally (if built with -DEXPORTMALLINFO) export the output
994 of mallinfo via http, as tor/mallinfo.txt. Only accessible
998 - Do not intermix bridge routers with controller-added
999 routers. (Bugfix on 0.2.0.x)
1000 - Do not fail with an assert when accept() returns an unexpected
1001 address family. Addresses but does not wholly fix bug 483. (Bugfix
1003 - Let directory authorities startup even when they can't generate
1004 a descriptor immediately, e.g. because they don't know their
1006 - Stop putting the authentication cookie in a file called "0"
1007 in your working directory if you don't specify anything for the
1008 new CookieAuthFile option. Reported by Matt Edman.
1009 - Make it possible to read the PROTOCOLINFO response in a way that
1010 conforms to our control-spec. Reported by Matt Edman.
1011 - Fix a minor memory leak when we fail to find enough suitable
1012 servers to choose a circuit. Bugfix on 0.1.2.x.
1013 - Stop leaking part of the descriptor when we run into a particularly
1014 unparseable piece of it. Bugfix on 0.1.2.x.
1015 - Unmap the extrainfo cache file on exit.
1018 Changes in version 0.2.0.5-alpha - 2007-08-19
1019 This fifth development snapshot fixes compilation on Windows again;
1020 fixes an obnoxious client-side bug that slowed things down and put
1021 extra load on the network; gets us closer to using the v3 directory
1022 voting scheme; makes it easier for Tor controllers to use cookie-based
1023 authentication; and fixes a variety of other bugs.
1026 - Version 1 directories are no longer generated in full. Instead,
1027 authorities generate and serve "stub" v1 directories that list
1028 no servers. This will stop Tor versions 0.1.0.x and earlier from
1029 working, but (for security reasons) nobody should be running those
1032 o Major bugfixes (compilation, 0.2.0.x):
1033 - Try to fix Win32 compilation again: improve checking for IPv6 types.
1034 - Try to fix MSVC compilation: build correctly on platforms that do
1035 not define s6_addr16 or s6_addr32.
1036 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
1039 o Major bugfixes (stream expiration):
1040 - Expire not-yet-successful application streams in all cases if
1041 they've been around longer than SocksTimeout. Right now there are
1042 some cases where the stream will live forever, demanding a new
1043 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
1046 o Minor features (directory servers):
1047 - When somebody requests a list of statuses or servers, and we have
1048 none of those, return a 404 rather than an empty 200.
1050 o Minor features (directory voting):
1051 - Store v3 consensus status consensuses on disk, and reload them
1054 o Minor features (security):
1055 - Warn about unsafe ControlPort configurations.
1056 - Refuse to start with certain directory authority keys, and
1057 encourage people using them to stop.
1059 o Minor features (controller):
1060 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
1061 is valid before any authentication has been received. It tells
1062 a controller what kind of authentication is expected, and what
1063 protocol is spoken. Implements proposal 119.
1064 - New config option CookieAuthFile to choose a new location for the
1065 cookie authentication file, and config option
1066 CookieAuthFileGroupReadable to make it group-readable.
1068 o Minor features (unit testing):
1069 - Add command-line arguments to unit-test executable so that we can
1070 invoke any chosen test from the command line rather than having
1071 to run the whole test suite at once; and so that we can turn on
1072 logging for the unit tests.
1074 o Minor bugfixes (on 0.1.2.x):
1075 - If we require CookieAuthentication but we fail to write the
1076 cookie file, we would warn but not exit, and end up in a state
1077 where no controller could authenticate. Now we exit.
1078 - If we require CookieAuthentication, stop generating a new cookie
1079 every time we change any piece of our config.
1080 - When loading bandwidth history, do not believe any information in
1081 the future. Fixes bug 434.
1082 - When loading entry guard information, do not believe any information
1084 - When we have our clock set far in the future and generate an
1085 onion key, then re-set our clock to be correct, we should not stop
1086 the onion key from getting rotated.
1087 - Clean up torrc sample config file.
1088 - Do not automatically run configure from autogen.sh. This
1089 non-standard behavior tended to annoy people who have built other
1092 o Minor bugfixes (on 0.2.0.x):
1093 - Fix a bug with AutomapHostsOnResolve that would always cause
1094 the second request to fail. Bug reported by Kate. Bugfix on
1096 - Fix a bug in ADDRMAP controller replies that would sometimes
1097 try to print a NULL. Patch from tup.
1098 - Read v3 directory authority keys from the right location.
1099 - Numerous bugfixes to directory voting code.
1102 Changes in version 0.1.2.16 - 2007-08-01
1103 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
1104 remote attacker in certain situations to rewrite the user's torrc
1105 configuration file. This can completely compromise anonymity of users
1106 in most configurations, including those running the Vidalia bundles,
1107 TorK, etc. Or worse.
1109 o Major security fixes:
1110 - Close immediately after missing authentication on control port;
1111 do not allow multiple authentication attempts.
1114 Changes in version 0.2.0.4-alpha - 2007-08-01
1115 This fourth development snapshot fixes a critical security vulnerability
1116 for most users, specifically those running Vidalia, TorK, etc. Everybody
1117 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
1119 o Major security fixes:
1120 - Close immediately after missing authentication on control port;
1121 do not allow multiple authentication attempts.
1123 o Major bugfixes (compilation):
1124 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
1127 o Minor features (performance):
1128 - Be even more aggressive about releasing RAM from small
1129 empty buffers. Thanks to our free-list code, this shouldn't be too
1130 performance-intensive.
1131 - Disable sentinel-based debugging for buffer code: we squashed all
1132 the bugs that this was supposed to detect a long time ago, and
1133 now its only effect is to change our buffer sizes from nice
1134 powers of two (which platform mallocs tend to like) to values
1135 siightly over powers of two (which make some platform mallocs sad).
1136 - Log malloc statistics from mallinfo() on platforms where it
1140 Changes in version 0.2.0.3-alpha - 2007-07-29
1141 This third development snapshot introduces new experimental
1142 blocking-resistance features and a preliminary version of the v3
1143 directory voting design, and includes many other smaller features
1147 - The first pieces of our "bridge" design for blocking-resistance
1148 are implemented. People can run bridge directory authorities;
1149 people can run bridges; and people can configure their Tor clients
1150 with a set of bridges to use as the first hop into the Tor network.
1151 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
1153 - Create listener connections before we setuid to the configured
1154 User and Group. Now non-Windows users can choose port values
1155 under 1024, start Tor as root, and have Tor bind those ports
1156 before it changes to another UID. (Windows users could already
1158 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
1159 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
1160 on "vserver" accounts. (Patch from coderman.)
1161 - Be even more aggressive about separating local traffic from relayed
1162 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
1164 o Major features (experimental):
1165 - First cut of code for "v3 dir voting": directory authorities will
1166 vote on a common network status document rather than each publishing
1167 their own opinion. This code needs more testing and more corner-case
1168 handling before it's ready for use.
1171 - Directory authorities now call routers Fast if their bandwidth is
1172 at least 100KB/s, and consider their bandwidth adequate to be a
1173 Guard if it is at least 250KB/s, no matter the medians. This fix
1174 complements proposal 107. [Bugfix on 0.1.2.x]
1175 - Directory authorities now never mark more than 3 servers per IP as
1176 Valid and Running. (Implements proposal 109, by Kevin Bauer and
1178 - Minor change to organizationName and commonName generation
1179 procedures in TLS certificates during Tor handshakes, to invalidate
1180 some earlier censorware approaches. This is not a long-term
1181 solution, but applying it will give us a bit of time to look into
1182 the epidemiology of countermeasures as they spread.
1184 o Major bugfixes (directory):
1185 - Rewrite directory tokenization code to never run off the end of
1186 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
1188 o Minor features (controller):
1189 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
1190 match requests to applications. (Patch from Robert Hogan.)
1191 - Report address and port correctly on connections to DNSPort. (Patch
1193 - Add a RESOLVE command to launch hostname lookups. (Original patch
1195 - Add GETINFO status/enough-dir-info to let controllers tell whether
1196 Tor has downloaded sufficient directory information. (Patch
1198 - You can now use the ControlSocket option to tell Tor to listen for
1199 controller connections on Unix domain sockets on systems that
1200 support them. (Patch from Peter Palfrader.)
1201 - STREAM NEW events are generated for DNSPort requests and for
1202 tunneled directory connections. (Patch from Robert Hogan.)
1203 - New "GETINFO address-mappings/*" command to get address mappings
1204 with expiry information. "addr-mappings/*" is now deprecated.
1207 o Minor features (misc):
1208 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
1210 - The tor-gencert tool for v3 directory authorities now creates all
1211 files as readable to the file creator only, and write-protects
1212 the authority identity key.
1213 - When dumping memory usage, list bytes used in buffer memory
1215 - When running with dmalloc, dump more stats on hup and on exit.
1216 - Directory authorities now fail quickly and (relatively) harmlessly
1217 if they generate a network status document that is somehow
1220 o Traffic load balancing improvements:
1221 - If exit bandwidth ever exceeds one third of total bandwidth, then
1222 use the correct formula to weight exit nodes when choosing paths.
1223 (Based on patch from Mike Perry.)
1224 - Choose perfectly fairly among routers when choosing by bandwidth and
1225 weighting by fraction of bandwidth provided by exits. Previously, we
1226 would choose with only approximate fairness, and correct ourselves
1227 if we ran off the end of the list. [Bugfix on 0.1.2.x]
1229 o Performance improvements:
1230 - Be more aggressive with freeing buffer RAM or putting it on the
1232 - Use Critical Sections rather than Mutexes for synchronizing threads
1233 on win32; Mutexes are heavier-weight, and designed for synchronizing
1236 o Deprecated and removed features:
1237 - RedirectExits is now deprecated.
1238 - Stop allowing address masks that do not correspond to bit prefixes.
1239 We have warned about these for a really long time; now it's time
1240 to reject them. (Patch from croup.)
1242 o Minor bugfixes (directory):
1243 - Fix another crash bug related to extra-info caching. (Bug found by
1244 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
1245 - Directories no longer return a "304 not modified" when they don't
1246 have the networkstatus the client asked for. Also fix a memory
1247 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
1248 - We had accidentally labelled 0.1.2.x directory servers as not
1249 suitable for begin_dir requests, and had labelled no directory
1250 servers as suitable for uploading extra-info documents. [Bugfix
1253 o Minor bugfixes (dns):
1254 - Fix a crash when DNSPort is set more than once. (Patch from Robert
1255 Hogan.) [Bugfix on 0.2.0.2-alpha]
1256 - Add DNSPort connections to the global connection list, so that we
1257 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
1259 - Fix a dangling reference that could lead to a crash when DNSPort is
1260 changed or closed (Patch from Robert Hogan.) [Bugfix on
1263 o Minor bugfixes (controller):
1264 - Provide DNS expiry times in GMT, not in local time. For backward
1265 compatibility, ADDRMAP events only provide GMT expiry in an extended
1266 field. "GETINFO address-mappings" always does the right thing.
1267 - Use CRLF line endings properly in NS events.
1268 - Terminate multi-line control events properly. (Original patch
1269 from tup.) [Bugfix on 0.1.2.x-alpha]
1270 - Do not include spaces in SOURCE_ADDR fields in STREAM
1271 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
1274 Changes in version 0.1.2.15 - 2007-07-17
1275 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
1276 problems, fixes compilation on BSD, and fixes a variety of other
1277 bugs. Everybody should upgrade.
1279 o Major bugfixes (compilation):
1280 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
1282 o Major bugfixes (crashes):
1283 - Try even harder not to dereference the first character after
1284 an mmap(). Reported by lodger.
1285 - Fix a crash bug in directory authorities when we re-number the
1286 routerlist while inserting a new router.
1287 - When the cached-routers file is an even multiple of the page size,
1288 don't run off the end and crash. (Fixes bug 455; based on idea
1290 - Fix eventdns.c behavior on Solaris: It is critical to include
1291 orconfig.h _before_ sys/types.h, so that we can get the expected
1292 definition of _FILE_OFFSET_BITS.
1294 o Major bugfixes (security):
1295 - Fix a possible buffer overrun when using BSD natd support. Bug
1297 - When sending destroy cells from a circuit's origin, don't include
1298 the reason for tearing down the circuit. The spec says we didn't,
1299 and now we actually don't. Reported by lodger.
1300 - Keep streamids from different exits on a circuit separate. This
1301 bug may have allowed other routers on a given circuit to inject
1302 cells into streams. Reported by lodger; fixes bug 446.
1303 - If there's a never-before-connected-to guard node in our list,
1304 never choose any guards past it. This way we don't expand our
1305 guard list unless we need to.
1307 o Minor bugfixes (guard nodes):
1308 - Weight guard selection by bandwidth, so that low-bandwidth nodes
1309 don't get overused as guards.
1311 o Minor bugfixes (directory):
1312 - Correctly count the number of authorities that recommend each
1313 version. Previously, we were under-counting by 1.
1314 - Fix a potential crash bug when we load many server descriptors at
1315 once and some of them make others of them obsolete. Fixes bug 458.
1317 o Minor bugfixes (hidden services):
1318 - Stop tearing down the whole circuit when the user asks for a
1319 connection to a port that the hidden service didn't configure.
1322 o Minor bugfixes (misc):
1323 - On Windows, we were preventing other processes from reading
1324 cached-routers while Tor was running. Reported by janbar.
1325 - Fix a possible (but very unlikely) bug in picking routers by
1326 bandwidth. Add a log message to confirm that it is in fact
1327 unlikely. Patch from lodger.
1328 - Backport a couple of memory leak fixes.
1329 - Backport miscellaneous cosmetic bugfixes.
1332 Changes in version 0.2.0.2-alpha - 2007-06-02
1333 o Major bugfixes on 0.2.0.1-alpha:
1334 - Fix an assertion failure related to servers without extra-info digests.
1335 Resolves bugs 441 and 442.
1337 o Minor features (directory):
1338 - Support "If-Modified-Since" when answering HTTP requests for
1339 directories, running-routers documents, and network-status documents.
1340 (There's no need to support it for router descriptors, since those
1341 are downloaded by descriptor digest.)
1343 o Minor build issues:
1344 - Clear up some MIPSPro compiler warnings.
1345 - When building from a tarball on a machine that happens to have SVK
1346 installed, report the micro-revision as whatever version existed
1347 in the tarball, not as "x".
1350 Changes in version 0.2.0.1-alpha - 2007-06-01
1351 This early development snapshot provides new features for people running
1352 Tor as both a client and a server (check out the new RelayBandwidth
1353 config options); lets Tor run as a DNS proxy; and generally moves us
1354 forward on a lot of fronts.
1356 o Major features, server usability:
1357 - New config options RelayBandwidthRate and RelayBandwidthBurst:
1358 a separate set of token buckets for relayed traffic. Right now
1359 relayed traffic is defined as answers to directory requests, and
1360 OR connections that don't have any local circuits on them.
1362 o Major features, client usability:
1363 - A client-side DNS proxy feature to replace the need for
1364 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
1365 for DNS requests on port 9999, use the Tor network to resolve them
1366 anonymously, and send the reply back like a regular DNS server.
1367 The code still only implements a subset of DNS.
1368 - Make PreferTunneledDirConns and TunnelDirConns work even when
1369 we have no cached directory info. This means Tor clients can now
1370 do all of their connections protected by TLS.
1372 o Major features, performance and efficiency:
1373 - Directory authorities accept and serve "extra info" documents for
1374 routers. These documents contain fields from router descriptors
1375 that aren't usually needed, and that use a lot of excess
1376 bandwidth. Once these fields are removed from router descriptors,
1377 the bandwidth savings should be about 60%. [Partially implements
1379 - Servers upload extra-info documents to any authority that accepts
1380 them. Authorities (and caches that have been configured to download
1381 extra-info documents) download them as needed. [Partially implements
1383 - Change the way that Tor buffers data that it is waiting to write.
1384 Instead of queueing data cells in an enormous ring buffer for each
1385 client->OR or OR->OR connection, we now queue cells on a separate
1386 queue for each circuit. This lets us use less slack memory, and
1387 will eventually let us be smarter about prioritizing different kinds
1389 - Use memory pools to allocate cells with better speed and memory
1390 efficiency, especially on platforms where malloc() is inefficient.
1391 - Stop reading on edge connections when their corresponding circuit
1392 buffers are full; start again as the circuits empty out.
1394 o Major features, other:
1395 - Add an HSAuthorityRecordStats option that hidden service authorities
1396 can use to track statistics of overall hidden service usage without
1397 logging information that would be very useful to an attacker.
1398 - Start work implementing multi-level keys for directory authorities:
1399 Add a standalone tool to generate key certificates. (Proposal 103.)
1402 - Directory authorities now call routers Stable if they have an
1403 uptime of at least 30 days, even if that's not the median uptime
1404 in the network. Implements proposal 107, suggested by Kevin Bauer
1407 o Minor fixes (resource management):
1408 - Count the number of open sockets separately from the number
1409 of active connection_t objects. This will let us avoid underusing
1410 our allocated connection limit.
1411 - We no longer use socket pairs to link an edge connection to an
1412 anonymous directory connection or a DirPort test connection.
1413 Instead, we track the link internally and transfer the data
1414 in-process. This saves two sockets per "linked" connection (at the
1415 client and at the server), and avoids the nasty Windows socketpair()
1417 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
1418 for every single inactive connection_t. Free items from the
1419 4k/16k-buffer free lists when they haven't been used for a while.
1421 o Minor features (build):
1422 - Make autoconf search for libevent, openssl, and zlib consistently.
1423 - Update deprecated macros in configure.in.
1424 - When warning about missing headers, tell the user to let us
1425 know if the compile succeeds anyway, so we can downgrade the
1427 - Include the current subversion revision as part of the version
1428 string: either fetch it directly if we're in an SVN checkout, do
1429 some magic to guess it if we're in an SVK checkout, or use
1430 the last-detected version if we're building from a .tar.gz.
1431 Use this version consistently in log messages.
1433 o Minor features (logging):
1434 - Always prepend "Bug: " to any log message about a bug.
1435 - Put a platform string (e.g. "Linux i686") in the startup log
1436 message, so when people paste just their logs, we know if it's
1437 OpenBSD or Windows or what.
1438 - When logging memory usage, break down memory used in buffers by
1441 o Minor features (directory system):
1442 - New config option V2AuthoritativeDirectory that all directory
1443 authorities should set. This will let future authorities choose
1444 not to serve V2 directory information.
1445 - Directory authorities allow multiple router descriptors and/or extra
1446 info documents to be uploaded in a single go. This will make
1447 implementing proposal 104 simpler.
1449 o Minor features (controller):
1450 - Add a new config option __DisablePredictedCircuits designed for
1451 use by the controller, when we don't want Tor to build any circuits
1453 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
1454 so we can exit from the middle of the circuit.
1455 - Implement "getinfo status/circuit-established".
1456 - Implement "getinfo status/version/..." so a controller can tell
1457 whether the current version is recommended, and whether any versions
1458 are good, and how many authorities agree. (Patch from shibz.)
1460 o Minor features (hidden services):
1461 - Allow multiple HiddenServicePort directives with the same virtual
1462 port; when they occur, the user is sent round-robin to one
1463 of the target ports chosen at random. Partially fixes bug 393 by
1464 adding limited ad-hoc round-robining.
1466 o Minor features (other):
1468 - Add a new AutomapHostsOnResolve option: when it is enabled, any
1469 resolve request for hosts matching a given pattern causes Tor to
1470 generate an internal virtual address mapping for that host. This
1471 allows DNSPort to work sensibly with hidden service users. By
1472 default, .exit and .onion addresses are remapped; the list of
1473 patterns can be reconfigured with AutomapHostsSuffixes.
1474 - Add an "-F" option to tor-resolve to force a resolve for a .onion
1475 address. Thanks to the AutomapHostsOnResolve option, this is no
1476 longer a completely silly thing to do.
1477 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
1478 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
1479 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
1480 minus 1 byte: the actual maximum declared bandwidth.
1483 - Removed support for the old binary "version 0" controller protocol.
1484 This has been deprecated since 0.1.1, and warnings have been issued
1485 since 0.1.2. When we encounter a v0 control message, we now send
1486 back an error and close the connection.
1487 - Remove the old "dns worker" server DNS code: it hasn't been default
1488 since 0.1.2.2-alpha, and all the servers seem to be using the new
1491 o Minor bugfixes (portability):
1492 - Even though Windows is equally happy with / and \ as path separators,
1493 try to use \ consistently on Windows and / consistently on Unix: it
1494 makes the log messages nicer.
1495 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
1496 - Read resolv.conf files correctly on platforms where read() returns
1497 partial results on small file reads.
1499 o Minor bugfixes (directory):
1500 - Correctly enforce that elements of directory objects do not appear
1501 more often than they are allowed to appear.
1502 - When we are reporting the DirServer line we just parsed, we were
1503 logging the second stanza of the key fingerprint, not the first.
1505 o Minor bugfixes (logging):
1506 - When we hit an EOF on a log (probably because we're shutting down),
1507 don't try to remove the log from the list: just mark it as
1508 unusable. (Bulletproofs against bug 222.)
1510 o Minor bugfixes (other):
1511 - In the exitlist script, only consider the most recently published
1512 server descriptor for each server. Also, when the user requests
1513 a list of servers that _reject_ connections to a given address,
1514 explicitly exclude the IPs that also have servers that accept
1515 connections to that address. (Resolves bug 405.)
1516 - Stop allowing hibernating servers to be "stable" or "fast".
1517 - On Windows, we were preventing other processes from reading
1518 cached-routers while Tor was running. (Reported by janbar)
1519 - Make the NodeFamilies config option work. (Reported by
1520 lodger -- it has never actually worked, even though we added it
1522 - Check return values from pthread_mutex functions.
1523 - Don't save non-general-purpose router descriptors to the disk cache,
1524 because we have no way of remembering what their purpose was when
1526 - Add even more asserts to hunt down bug 417.
1527 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
1528 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
1529 Add a log message to confirm that it is in fact unlikely.
1531 o Minor bugfixes (controller):
1532 - Make 'getinfo fingerprint' return a 551 error if we're not a
1533 server, so we match what the control spec claims we do. Reported
1535 - Fix a typo in an error message when extendcircuit fails that
1536 caused us to not follow the \r\n-based delimiter protocol. Reported
1539 o Code simplifications and refactoring:
1540 - Stop passing around circuit_t and crypt_path_t pointers that are
1541 implicit in other procedure arguments.
1542 - Drop the old code to choke directory connections when the
1543 corresponding OR connections got full: thanks to the cell queue
1544 feature, OR conns don't get full any more.
1545 - Make dns_resolve() handle attaching connections to circuits
1546 properly, so the caller doesn't have to.
1547 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
1548 - Keep the connection array as a dynamic smartlist_t, rather than as
1549 a fixed-sized array. This is important, as the number of connections
1550 is becoming increasingly decoupled from the number of sockets.
1553 Changes in version 0.1.2.14 - 2007-05-25
1554 Tor 0.1.2.14 changes the addresses of two directory authorities (this
1555 change especially affects those who serve or use hidden services),
1556 and fixes several other crash- and security-related bugs.
1558 o Directory authority changes:
1559 - Two directory authorities (moria1 and moria2) just moved to new
1560 IP addresses. This change will particularly affect those who serve
1561 or use hidden services.
1563 o Major bugfixes (crashes):
1564 - If a directory server runs out of space in the connection table
1565 as it's processing a begin_dir request, it will free the exit stream
1566 but leave it attached to the circuit, leading to unpredictable
1567 behavior. (Reported by seeess, fixes bug 425.)
1568 - Fix a bug in dirserv_remove_invalid() that would cause authorities
1569 to corrupt memory under some really unlikely scenarios.
1570 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
1571 - Avoid segfaults when reading from mmaped descriptor file. (Reported
1574 o Major bugfixes (security):
1575 - When choosing an entry guard for a circuit, avoid using guards
1576 that are in the same family as the chosen exit -- not just guards
1577 that are exactly the chosen exit. (Reported by lodger.)
1579 o Major bugfixes (resource management):
1580 - If a directory authority is down, skip it when deciding where to get
1581 networkstatus objects or descriptors. Otherwise we keep asking
1582 every 10 seconds forever. Fixes bug 384.
1583 - Count it as a failure if we fetch a valid network-status but we
1584 don't want to keep it. Otherwise we'll keep fetching it and keep
1585 not wanting to keep it. Fixes part of bug 422.
1586 - If all of our dirservers have given us bad or no networkstatuses
1587 lately, then stop hammering them once per minute even when we
1588 think they're failed. Fixes another part of bug 422.
1591 - Actually set the purpose correctly for descriptors inserted with
1593 - When we have k non-v2 authorities in our DirServer config,
1594 we ignored the last k authorities in the list when updating our
1596 - Correctly back-off from requesting router descriptors that we are
1597 having a hard time downloading.
1598 - Read resolv.conf files correctly on platforms where read() returns
1599 partial results on small file reads.
1600 - Don't rebuild the entire router store every time we get 32K of
1601 routers: rebuild it when the journal gets very large, or when
1602 the gaps in the store get very large.
1605 - When routers publish SVN revisions in their router descriptors,
1606 authorities now include those versions correctly in networkstatus
1608 - Warn when using a version of libevent before 1.3b to run a server on
1609 OSX or BSD: these versions interact badly with userspace threads.
1612 Changes in version 0.1.2.13 - 2007-04-24
1613 This release features some major anonymity fixes, such as safer path
1614 selection; better client performance; faster bootstrapping, better
1615 address detection, and better DNS support for servers; write limiting as
1616 well as read limiting to make servers easier to run; and a huge pile of
1617 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
1619 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
1620 of the Freenode IRC network, remembering his patience and vision for
1621 free speech on the Internet.
1624 - Fix a memory leak when we ask for "all" networkstatuses and we
1625 get one we don't recognize.
1626 - Add more asserts to hunt down bug 417.
1627 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
1630 Changes in version 0.1.2.12-rc - 2007-03-16
1632 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
1633 directory information requested inside Tor connections (i.e. via
1634 begin_dir cells). It only triggered when the same connection was
1635 serving other data at the same time. Reported by seeess.
1638 - When creating a circuit via the controller, send a 'launched'
1639 event when we're done, so we follow the spec better.
1642 Changes in version 0.1.2.11-rc - 2007-03-15
1643 o Minor bugfixes (controller), reported by daejees:
1644 - Correct the control spec to match how the code actually responds
1645 to 'getinfo addr-mappings/*'.
1646 - The control spec described a GUARDS event, but the code
1647 implemented a GUARD event. Standardize on GUARD, but let people
1651 Changes in version 0.1.2.10-rc - 2007-03-07
1652 o Major bugfixes (Windows):
1653 - Do not load the NT services library functions (which may not exist)
1654 just to detect if we're a service trying to shut down. Now we run
1655 on Win98 and friends again.
1657 o Minor bugfixes (other):
1658 - Clarify a couple of log messages.
1659 - Fix a misleading socks5 error number.
1662 Changes in version 0.1.2.9-rc - 2007-03-02
1663 o Major bugfixes (Windows):
1664 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
1665 of the usual GCC "%llu". This prevents a bug when saving 64-bit
1666 int configuration values: the high-order 32 bits would get
1667 truncated. In particular, we were being bitten by the default
1668 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
1669 and maybe also bug 397.)
1671 o Minor bugfixes (performance):
1672 - Use OpenSSL's AES implementation on platforms where it's faster.
1673 This could save us as much as 10% CPU usage.
1675 o Minor bugfixes (server):
1676 - Do not rotate onion key immediately after setting it for the first
1679 o Minor bugfixes (directory authorities):
1680 - Stop calling servers that have been hibernating for a long time
1681 "stable". Also, stop letting hibernating or obsolete servers affect
1682 uptime and bandwidth cutoffs.
1683 - Stop listing hibernating servers in the v1 directory.
1685 o Minor bugfixes (hidden services):
1686 - Upload hidden service descriptors slightly less often, to reduce
1687 load on authorities.
1689 o Minor bugfixes (other):
1690 - Fix an assert that could trigger if a controller quickly set then
1691 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
1692 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
1694 - Fix a potential race condition in the rpm installer. Found by
1696 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
1697 of 2 as indicating that the server is completely bad; it sometimes
1698 means that the server is just bad for the request in question. (may fix
1699 the last of bug 326.)
1700 - Disable encrypted directory connections when we don't have a server
1701 descriptor for the destination. We'll get this working again in
1705 Changes in version 0.1.2.8-beta - 2007-02-26
1706 o Major bugfixes (crashes):
1707 - Stop crashing when the controller asks us to resetconf more than
1708 one config option at once. (Vidalia 0.0.11 does this.)
1709 - Fix a crash that happened on Win98 when we're given command-line
1710 arguments: don't try to load NT service functions from advapi32.dll
1711 except when we need them. (Bug introduced in 0.1.2.7-alpha;
1713 - Fix a longstanding obscure crash bug that could occur when
1714 we run out of DNS worker processes. (Resolves bug 390.)
1716 o Major bugfixes (hidden services):
1717 - Correctly detect whether hidden service descriptor downloads are
1718 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
1720 o Major bugfixes (accounting):
1721 - When we start during an accounting interval before it's time to wake
1722 up, remember to wake up at the correct time. (May fix bug 342.)
1724 o Minor bugfixes (controller):
1725 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
1726 clear the corresponding on_circuit variable, and remember later
1727 that we don't need to send a redundant CLOSED event. (Resolves part
1729 - Report events where a resolve succeeded or where we got a socks
1730 protocol error correctly, rather than calling both of them
1732 - Change reported stream target addresses to IP consistently when
1733 we finally get the IP from an exit node.
1734 - Send log messages to the controller even if they happen to be very
1737 o Minor bugfixes (other):
1738 - Display correct results when reporting which versions are
1739 recommended, and how recommended they are. (Resolves bug 383.)
1740 - Improve our estimates for directory bandwidth to be less random:
1741 guess that an unrecognized directory will have the average bandwidth
1742 from all known directories, not that it will have the average
1743 bandwidth from those directories earlier than it on the list.
1744 - If we start a server with ClientOnly 1, then set ClientOnly to 0
1745 and hup, stop triggering an assert based on an empty onion_key.
1746 - On platforms with no working mmap() equivalent, don't warn the
1747 user when cached-routers doesn't exist.
1748 - Warn the user when mmap() [or its equivalent] fails for some reason
1749 other than file-not-found.
1750 - Don't warn the user when cached-routers.new doesn't exist: that's
1751 perfectly fine when starting up for the first time.
1752 - When EntryNodes are configured, rebuild the guard list to contain,
1753 in order: the EntryNodes that were guards before; the rest of the
1754 EntryNodes; the nodes that were guards before.
1755 - Mask out all signals in sub-threads; only the libevent signal
1756 handler should be processing them. This should prevent some crashes
1757 on some machines using pthreads. (Patch from coderman.)
1758 - Fix switched arguments on memset in the implementation of
1759 tor_munmap() for systems with no mmap() call.
1760 - When Tor receives a router descriptor that it asked for, but
1761 no longer wants (because it has received fresh networkstatuses
1762 in the meantime), do not warn the user. Cache the descriptor if
1763 we're a cache; drop it if we aren't.
1764 - Make earlier entry guards _really_ get retried when the network
1766 - On a malformed DNS reply, always give an error to the corresponding
1768 - Build with recent libevents on platforms that do not define the
1769 nonstandard types "u_int8_t" and friends.
1771 o Minor features (controller):
1772 - Warn the user when an application uses the obsolete binary v0
1773 control protocol. We're planning to remove support for it during
1774 the next development series, so it's good to give people some
1776 - Add STREAM_BW events to report per-entry-stream bandwidth
1777 use. (Patch from Robert Hogan.)
1778 - Rate-limit SIGNEWNYM signals in response to controllers that
1779 impolitely generate them for every single stream. (Patch from
1780 mwenge; closes bug 394.)
1781 - Make REMAP stream events have a SOURCE (cache or exit), and
1782 make them generated in every case where we get a successful
1783 connected or resolved cell.
1785 o Minor bugfixes (performance):
1786 - Call router_have_min_dir_info half as often. (This is showing up in
1787 some profiles, but not others.)
1788 - When using GCC, make log_debug never get called at all, and its
1789 arguments never get evaluated, when no debug logs are configured.
1790 (This is showing up in some profiles, but not others.)
1793 - Remove some never-implemented options. Mark PathlenCoinWeight as
1795 - Implement proposal 106: Stop requiring clients to have well-formed
1796 certificates; stop checking nicknames in certificates. (Clients
1797 have certificates so that they can look like Tor servers, but in
1798 the future we might want to allow them to look like regular TLS
1799 clients instead. Nicknames in certificates serve no purpose other
1800 than making our protocol easier to recognize on the wire.)
1801 - Revise messages on handshake failure again to be even more clear about
1802 which are incoming connections and which are outgoing.
1803 - Discard any v1 directory info that's over 1 month old (for
1804 directories) or over 1 week old (for running-routers lists).
1805 - Do not warn when individual nodes in the configuration's EntryNodes,
1806 ExitNodes, etc are down: warn only when all possible nodes
1807 are down. (Fixes bug 348.)
1808 - Always remove expired routers and networkstatus docs before checking
1809 whether we have enough information to build circuits. (Fixes
1811 - Put a lower-bound on MaxAdvertisedBandwidth.
1814 Changes in version 0.1.2.7-alpha - 2007-02-06
1815 o Major bugfixes (rate limiting):
1816 - Servers decline directory requests much more aggressively when
1817 they're low on bandwidth. Otherwise they end up queueing more and
1818 more directory responses, which can't be good for latency.
1819 - But never refuse directory requests from local addresses.
1820 - Fix a memory leak when sending a 503 response for a networkstatus
1822 - Be willing to read or write on local connections (e.g. controller
1823 connections) even when the global rate limiting buckets are empty.
1824 - If our system clock jumps back in time, don't publish a negative
1825 uptime in the descriptor. Also, don't let the global rate limiting
1826 buckets go absurdly negative.
1827 - Flush local controller connection buffers periodically as we're
1828 writing to them, so we avoid queueing 4+ megabytes of data before
1831 o Major bugfixes (NT services):
1832 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
1833 command-line flag so that admins can override the default by saying
1834 "tor --service install --user "SomeUser"". This will not affect
1835 existing installed services. Also, warn the user that the service
1836 will look for its configuration file in the service user's
1837 %appdata% directory. (We can't do the 'hardwire the user's appdata
1838 directory' trick any more, since we may not have read access to that
1841 o Major bugfixes (other):
1842 - Previously, we would cache up to 16 old networkstatus documents
1843 indefinitely, if they came from nontrusted authorities. Now we
1844 discard them if they are more than 10 days old.
1845 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
1847 - Detect and reject malformed DNS responses containing circular
1849 - If exits are rare enough that we're not marking exits as guards,
1850 ignore exit bandwidth when we're deciding the required bandwidth
1852 - When we're handling a directory connection tunneled over Tor,
1853 don't fill up internal memory buffers with all the data we want
1854 to tunnel; instead, only add it if the OR connection that will
1855 eventually receive it has some room for it. (This can lead to
1856 slowdowns in tunneled dir connections; a better solution will have
1859 o Minor bugfixes (dns):
1860 - Add some defensive programming to eventdns.c in an attempt to catch
1861 possible memory-stomping bugs.
1862 - Detect and reject DNS replies containing IPv4 or IPv6 records with
1863 an incorrect number of bytes. (Previously, we would ignore the
1865 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
1866 in the correct order, and doesn't crash.
1867 - Free memory held in recently-completed DNS lookup attempts on exit.
1868 This was not a memory leak, but may have been hiding memory leaks.
1869 - Handle TTL values correctly on reverse DNS lookups.
1870 - Treat failure to parse resolv.conf as an error.
1872 o Minor bugfixes (other):
1873 - Fix crash with "tor --list-fingerprint" (reported by seeess).
1874 - When computing clock skew from directory HTTP headers, consider what
1875 time it was when we finished asking for the directory, not what
1877 - Expire socks connections if they spend too long waiting for the
1878 handshake to finish. Previously we would let them sit around for
1879 days, if the connecting application didn't close them either.
1880 - And if the socks handshake hasn't started, don't send a
1881 "DNS resolve socks failed" handshake reply; just close it.
1882 - Stop using C functions that OpenBSD's linker doesn't like.
1883 - Don't launch requests for descriptors unless we have networkstatuses
1884 from at least half of the authorities. This delays the first
1885 download slightly under pathological circumstances, but can prevent
1886 us from downloading a bunch of descriptors we don't need.
1887 - Do not log IPs with TLS failures for incoming TLS
1888 connections. (Fixes bug 382.)
1889 - If the user asks to use invalid exit nodes, be willing to use
1891 - Stop using the reserved ac_cv namespace in our configure script.
1892 - Call stat() slightly less often; use fstat() when possible.
1893 - Refactor the way we handle pending circuits when an OR connection
1894 completes or fails, in an attempt to fix a rare crash bug.
1895 - Only rewrite a conn's address based on X-Forwarded-For: headers
1896 if it's a parseable public IP address; and stop adding extra quotes
1897 to the resulting address.
1900 - Weight directory requests by advertised bandwidth. Now we can
1901 let servers enable write limiting but still allow most clients to
1902 succeed at their directory requests. (We still ignore weights when
1903 choosing a directory authority; I hope this is a feature.)
1906 - Create a new file ReleaseNotes which was the old ChangeLog. The
1907 new ChangeLog file now includes the summaries for all development
1909 - Check for addresses with invalid characters at the exit as well
1910 as at the client, and warn less verbosely when they fail. You can
1911 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
1912 - Adapt a patch from goodell to let the contrib/exitlist script
1913 take arguments rather than require direct editing.
1914 - Inform the server operator when we decide not to advertise a
1915 DirPort due to AccountingMax enabled or a low BandwidthRate. It
1916 was confusing Zax, so now we're hopefully more helpful.
1917 - Bring us one step closer to being able to establish an encrypted
1918 directory tunnel without knowing a descriptor first. Still not
1919 ready yet. As part of the change, now assume we can use a
1920 create_fast cell if we don't know anything about a router.
1921 - Allow exit nodes to use nameservers running on ports other than 53.
1922 - Servers now cache reverse DNS replies.
1923 - Add an --ignore-missing-torrc command-line option so that we can
1924 get the "use sensible defaults if the configuration file doesn't
1925 exist" behavior even when specifying a torrc location on the command
1928 o Minor features (controller):
1929 - Track reasons for OR connection failure; make these reasons
1930 available via the controller interface. (Patch from Mike Perry.)
1931 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
1932 can learn when clients are sending malformed hostnames to Tor.
1933 - Clean up documentation for controller status events.
1934 - Add a REMAP status to stream events to note that a stream's
1935 address has changed because of a cached address or a MapAddress
1939 Changes in version 0.1.2.6-alpha - 2007-01-09
1941 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
1942 connection handles more than 4 gigs in either direction, we crash.
1943 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
1944 advertised exit node, somebody might try to exit from us when
1945 we're bootstrapping and before we've built our descriptor yet.
1946 Refuse the connection rather than crashing.
1949 - Warn if we (as a server) find that we've resolved an address that we
1950 weren't planning to resolve.
1951 - Warn that using select() on any libevent version before 1.1 will be
1952 unnecessarily slow (even for select()).
1953 - Flush ERR-level controller status events just like we currently
1954 flush ERR-level log events, so that a Tor shutdown doesn't prevent
1955 the controller from learning about current events.
1957 o Minor features (more controller status events):
1958 - Implement EXTERNAL_ADDRESS server status event so controllers can
1959 learn when our address changes.
1960 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
1961 can learn when directories reject our descriptor.
1962 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
1963 can learn when a client application is speaking a non-socks protocol
1965 - Implement DANGEROUS_SOCKS client status event so controllers
1966 can learn when a client application is leaking DNS addresses.
1967 - Implement BUG general status event so controllers can learn when
1968 Tor is unhappy about its internal invariants.
1969 - Implement CLOCK_SKEW general status event so controllers can learn
1970 when Tor thinks the system clock is set incorrectly.
1971 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
1972 server status events so controllers can learn when their descriptors
1973 are accepted by a directory.
1974 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
1975 server status events so controllers can learn about Tor's progress in
1976 deciding whether it's reachable from the outside.
1977 - Implement BAD_LIBEVENT general status event so controllers can learn
1978 when we have a version/method combination in libevent that needs to
1980 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
1981 and DNS_USELESS server status events so controllers can learn
1982 about changes to DNS server status.
1984 o Minor features (directory):
1985 - Authorities no longer recommend exits as guards if this would shift
1986 too much load to the exit nodes.
1989 Changes in version 0.1.2.5-alpha - 2007-01-06
1991 - Enable write limiting as well as read limiting. Now we sacrifice
1992 capacity if we're pushing out lots of directory traffic, rather
1993 than overrunning the user's intended bandwidth limits.
1994 - Include TLS overhead when counting bandwidth usage; previously, we
1995 would count only the bytes sent over TLS, but not the bytes used
1997 - Support running the Tor service with a torrc not in the same
1998 directory as tor.exe and default to using the torrc located in
1999 the %appdata%\Tor\ of the user who installed the service. Patch
2001 - Servers now check for the case when common DNS requests are going to
2002 wildcarded addresses (i.e. all getting the same answer), and change
2003 their exit policy to reject *:* if it's happening.
2004 - Implement BEGIN_DIR cells, so we can connect to the directory
2005 server via TLS to do encrypted directory requests rather than
2006 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
2007 config options if you like.
2009 o Minor features (config and docs):
2010 - Start using the state file to store bandwidth accounting data:
2011 the bw_accounting file is now obsolete. We'll keep generating it
2012 for a while for people who are still using 0.1.2.4-alpha.
2013 - Try to batch changes to the state file so that we do as few
2014 disk writes as possible while still storing important things in
2016 - The state file and the bw_accounting file get saved less often when
2017 the AvoidDiskWrites config option is set.
2018 - Make PIDFile work on Windows (untested).
2019 - Add internal descriptions for a bunch of configuration options:
2020 accessible via controller interface and in comments in saved
2022 - Reject *:563 (NNTPS) in the default exit policy. We already reject
2023 NNTP by default, so this seems like a sensible addition.
2024 - Clients now reject hostnames with invalid characters. This should
2025 avoid some inadvertent info leaks. Add an option
2026 AllowNonRFC953Hostnames to disable this behavior, in case somebody
2027 is running a private network with hosts called @, !, and #.
2028 - Add a maintainer script to tell us which options are missing
2029 documentation: "make check-docs".
2030 - Add a new address-spec.txt document to describe our special-case
2031 addresses: .exit, .onion, and .noconnnect.
2033 o Minor features (DNS):
2034 - Ongoing work on eventdns infrastructure: now it has dns server
2035 and ipv6 support. One day Tor will make use of it.
2036 - Add client-side caching for reverse DNS lookups.
2037 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
2038 - When we change nameservers or IP addresses, reset and re-launch
2039 our tests for DNS hijacking.
2041 o Minor features (directory):
2042 - Authorities now specify server versions in networkstatus. This adds
2043 about 2% to the size of compressed networkstatus docs, and allows
2044 clients to tell which servers support BEGIN_DIR and which don't.
2045 The implementation is forward-compatible with a proposed future
2046 protocol version scheme not tied to Tor versions.
2047 - DirServer configuration lines now have an orport= option so
2048 clients can open encrypted tunnels to the authorities without
2049 having downloaded their descriptors yet. Enabled for moria1,
2050 moria2, tor26, and lefkada now in the default configuration.
2051 - Directory servers are more willing to send a 503 "busy" if they
2052 are near their write limit, especially for v1 directory requests.
2053 Now they can use their limited bandwidth for actual Tor traffic.
2054 - Clients track responses with status 503 from dirservers. After a
2055 dirserver has given us a 503, we try not to use it until an hour has
2056 gone by, or until we have no dirservers that haven't given us a 503.
2057 - When we get a 503 from a directory, and we're not a server, we don't
2058 count the failure against the total number of failures allowed
2059 for the thing we're trying to download.
2060 - Report X-Your-Address-Is correctly from tunneled directory
2061 connections; don't report X-Your-Address-Is when it's an internal
2062 address; and never believe reported remote addresses when they're
2064 - Protect against an unlikely DoS attack on directory servers.
2065 - Add a BadDirectory flag to network status docs so that authorities
2066 can (eventually) tell clients about caches they believe to be
2069 o Minor features (controller):
2070 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
2071 - Reimplement GETINFO so that info/names stays in sync with the
2073 - Implement "GETINFO fingerprint".
2074 - Implement "SETEVENTS GUARD" so controllers can get updates on
2075 entry guard status as it changes.
2077 o Minor features (clean up obsolete pieces):
2078 - Remove some options that have been deprecated since at least
2079 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
2080 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
2082 - We no longer look for identity and onion keys in "identity.key" and
2083 "onion.key" -- these were replaced by secret_id_key and
2084 secret_onion_key in 0.0.8pre1.
2085 - We no longer require unrecognized directory entries to be
2088 o Major bugfixes (security):
2089 - Stop sending the HttpProxyAuthenticator string to directory
2090 servers when directory connections are tunnelled through Tor.
2091 - Clients no longer store bandwidth history in the state file.
2092 - Do not log introduction points for hidden services if SafeLogging
2094 - When generating bandwidth history, round down to the nearest
2095 1k. When storing accounting data, round up to the nearest 1k.
2096 - When we're running as a server, remember when we last rotated onion
2097 keys, so that we will rotate keys once they're a week old even if
2098 we never stay up for a week ourselves.
2100 o Major bugfixes (other):
2101 - Fix a longstanding bug in eventdns that prevented the count of
2102 timed-out resolves from ever being reset. This bug caused us to
2103 give up on a nameserver the third time it timed out, and try it
2104 10 seconds later... and to give up on it every time it timed out
2106 - Take out the '5 second' timeout from the connection retry
2107 schedule. Now the first connect attempt will wait a full 10
2108 seconds before switching to a new circuit. Perhaps this will help
2109 a lot. Based on observations from Mike Perry.
2110 - Fix a bug on the Windows implementation of tor_mmap_file() that
2111 would prevent the cached-routers file from ever loading. Reported
2115 - Fix an assert failure when a directory authority sets
2116 AuthDirRejectUnlisted and then receives a descriptor from an
2117 unlisted router. Reported by seeess.
2118 - Avoid a double-free when parsing malformed DirServer lines.
2119 - Fix a bug when a BSD-style PF socket is first used. Patch from
2121 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
2122 to resolve an address at a given exit node even when they ask for
2124 - Servers no longer ever list themselves in their "family" line,
2125 even if configured to do so. This makes it easier to configure
2126 family lists conveniently.
2127 - When running as a server, don't fall back to 127.0.0.1 when no
2128 nameservers are configured in /etc/resolv.conf; instead, make the
2129 user fix resolv.conf or specify nameservers explicitly. (Resolves
2131 - Stop accepting certain malformed ports in configured exit policies.
2132 - Don't re-write the fingerprint file every restart, unless it has
2134 - Stop warning when a single nameserver fails: only warn when _all_ of
2135 our nameservers have failed. Also, when we only have one nameserver,
2136 raise the threshold for deciding that the nameserver is dead.
2137 - Directory authorities now only decide that routers are reachable
2138 if their identity keys are as expected.
2139 - When the user uses bad syntax in the Log config line, stop
2140 suggesting other bad syntax as a replacement.
2141 - Correctly detect ipv6 DNS capability on OpenBSD.
2143 o Minor bugfixes (controller):
2144 - Report the circuit number correctly in STREAM CLOSED events. Bug
2145 reported by Mike Perry.
2146 - Do not report bizarre values for results of accounting GETINFOs
2147 when the last second's write or read exceeds the allotted bandwidth.
2148 - Report "unrecognized key" rather than an empty string when the
2149 controller tries to fetch a networkstatus that doesn't exist.
2152 Changes in version 0.1.1.26 - 2006-12-14
2153 o Security bugfixes:
2154 - Stop sending the HttpProxyAuthenticator string to directory
2155 servers when directory connections are tunnelled through Tor.
2156 - Clients no longer store bandwidth history in the state file.
2157 - Do not log introduction points for hidden services if SafeLogging
2161 - Fix an assert failure when a directory authority sets
2162 AuthDirRejectUnlisted and then receives a descriptor from an
2163 unlisted router (reported by seeess).
2166 Changes in version 0.1.2.4-alpha - 2006-12-03
2168 - Add support for using natd; this allows FreeBSDs earlier than
2169 5.1.2 to have ipfw send connections through Tor without using
2170 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
2173 - Make all connections to addresses of the form ".noconnect"
2174 immediately get closed. This lets application/controller combos
2175 successfully test whether they're talking to the same Tor by
2176 watching for STREAM events.
2177 - Make cross.sh cross-compilation script work even when autogen.sh
2178 hasn't been run. (Patch from Michael Mohr.)
2179 - Statistics dumped by -USR2 now include a breakdown of public key
2180 operations, for profiling.
2183 - Fix a major leak when directory authorities parse their
2184 approved-routers list, a minor memory leak when we fail to pick
2185 an exit node, and a few rare leaks on errors.
2186 - Handle TransPort connections even when the server sends data before
2187 the client sends data. Previously, the connection would just hang
2188 until the client sent data. (Patch from tup based on patch from
2190 - Avoid assert failure when our cached-routers file is empty on
2194 - Don't log spurious warnings when we see a circuit close reason we
2195 don't recognize; it's probably just from a newer version of Tor.
2196 - Have directory authorities allow larger amounts of drift in uptime
2197 without replacing the server descriptor: previously, a server that
2198 restarted every 30 minutes could have 48 "interesting" descriptors
2200 - Start linking to the Tor specification and Tor reference manual
2201 correctly in the Windows installer.
2202 - Add Vidalia to the OS X uninstaller script, so when we uninstall
2203 Tor/Privoxy we also uninstall Vidalia.
2204 - Resume building on Irix64, and fix a lot of warnings from its
2206 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
2207 when we're running as a client.
2210 Changes in version 0.1.1.25 - 2006-11-04
2212 - When a client asks us to resolve (rather than connect to)
2213 an address, and we have a cached answer, give them the cached
2214 answer. Previously, we would give them no answer at all.
2215 - We were building exactly the wrong circuits when we predict
2216 hidden service requirements, meaning Tor would have to build all
2217 its circuits on demand.
2218 - If none of our live entry guards have a high uptime, but we
2219 require a guard with a high uptime, try adding a new guard before
2220 we give up on the requirement. This patch should make long-lived
2221 connections more stable on average.
2222 - When testing reachability of our DirPort, don't launch new
2223 tests when there's already one in progress -- unreachable
2224 servers were stacking up dozens of testing streams.
2226 o Security bugfixes:
2227 - When the user sends a NEWNYM signal, clear the client-side DNS
2228 cache too. Otherwise we continue to act on previous information.
2231 - Avoid a memory corruption bug when creating a hash table for
2233 - Avoid possibility of controller-triggered crash when misusing
2234 certain commands from a v0 controller on platforms that do not
2235 handle printf("%s",NULL) gracefully.
2236 - Avoid infinite loop on unexpected controller input.
2237 - Don't log spurious warnings when we see a circuit close reason we
2238 don't recognize; it's probably just from a newer version of Tor.
2239 - Add Vidalia to the OS X uninstaller script, so when we uninstall
2240 Tor/Privoxy we also uninstall Vidalia.
2243 Changes in version 0.1.2.3-alpha - 2006-10-29
2245 - Prepare for servers to publish descriptors less often: never
2246 discard a descriptor simply for being too old until either it is
2247 recommended by no authorities, or until we get a better one for
2248 the same router. Make caches consider retaining old recommended
2249 routers for even longer.
2250 - If most authorities set a BadExit flag for a server, clients
2251 don't think of it as a general-purpose exit. Clients only consider
2252 authorities that advertise themselves as listing bad exits.
2253 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
2254 headers for content, so that we can work better in the presence of
2255 caching HTTP proxies.
2256 - Allow authorities to list nodes as bad exits by fingerprint or by
2259 o Minor features, controller:
2260 - Add a REASON field to CIRC events; for backward compatibility, this
2261 field is sent only to controllers that have enabled the extended
2262 event format. Also, add additional reason codes to explain why
2263 a given circuit has been destroyed or truncated. (Patches from
2265 - Add a REMOTE_REASON field to extended CIRC events to tell the
2266 controller about why a remote OR told us to close a circuit.
2267 - Stream events also now have REASON and REMOTE_REASON fields,
2268 working much like those for circuit events.
2269 - There's now a GETINFO ns/... field so that controllers can ask Tor
2270 about the current status of a router.
2271 - A new event type "NS" to inform a controller when our opinion of
2272 a router's status has changed.
2273 - Add a GETINFO events/names and GETINFO features/names so controllers
2274 can tell which events and features are supported.
2275 - A new CLEARDNSCACHE signal to allow controllers to clear the
2276 client-side DNS cache without expiring circuits.
2278 o Security bugfixes:
2279 - When the user sends a NEWNYM signal, clear the client-side DNS
2280 cache too. Otherwise we continue to act on previous information.
2283 - Avoid sending junk to controllers or segfaulting when a controller
2284 uses EVENT_NEW_DESC with verbose nicknames.
2285 - Stop triggering asserts if the controller tries to extend hidden
2286 service circuits (reported by mwenge).
2287 - Avoid infinite loop on unexpected controller input.
2288 - When the controller does a "GETINFO network-status", tell it
2289 about even those routers whose descriptors are very old, and use
2290 long nicknames where appropriate.
2291 - Change NT service functions to be loaded on demand. This lets us
2292 build with MinGW without breaking Tor for Windows 98 users.
2293 - Do DirPort reachability tests less often, since a single test
2294 chews through many circuits before giving up.
2295 - In the hidden service example in torrc.sample, stop recommending
2296 esoteric and discouraged hidden service options.
2297 - When stopping an NT service, wait up to 10 sec for it to actually
2298 stop. (Patch from Matt Edman; resolves bug 295.)
2299 - Fix handling of verbose nicknames with ORCONN controller events:
2300 make them show up exactly when requested, rather than exactly when
2302 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
2303 printing a duplicate "$" in the keys we send (reported by mwenge).
2304 - Correctly set maximum connection limit on Cygwin. (This time
2306 - Try to detect Windows correctly when cross-compiling.
2307 - Detect the size of the routers file correctly even if it is
2308 corrupted (on systems without mmap) or not page-aligned (on systems
2309 with mmap). This bug was harmless.
2310 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
2311 to open a stream fails; now we do in more cases. This should
2312 make clients able to find a good exit faster in some cases, since
2313 unhandleable requests will now get an error rather than timing out.
2314 - Resolve two memory leaks when rebuilding the on-disk router cache
2315 (reported by fookoowa).
2316 - Clean up minor code warnings suggested by the MIPSpro C compiler,
2317 and reported by some Centos users.
2318 - Controller signals now work on non-Unix platforms that don't define
2319 SIGUSR1 and SIGUSR2 the way we expect.
2320 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
2321 values before failing, and always enables eventdns.
2322 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
2323 Try to fix this in configure.in by checking for most functions
2324 before we check for libevent.
2327 Changes in version 0.1.2.2-alpha - 2006-10-07
2329 - Make our async eventdns library on-by-default for Tor servers,
2330 and plan to deprecate the separate dnsworker threads.
2331 - Add server-side support for "reverse" DNS lookups (using PTR
2332 records so clients can determine the canonical hostname for a given
2333 IPv4 address). Only supported by servers using eventdns; servers
2334 now announce in their descriptors whether they support eventdns.
2335 - Specify and implement client-side SOCKS5 interface for reverse DNS
2336 lookups (see doc/socks-extensions.txt).
2337 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
2338 connect to directory servers through Tor. Previously, clients needed
2339 to find Tor exits to make private connections to directory servers.
2340 - Avoid choosing Exit nodes for entry or middle hops when the
2341 total bandwidth available from non-Exit nodes is much higher than
2342 the total bandwidth available from Exit nodes.
2343 - Workaround for name servers (like Earthlink's) that hijack failing
2344 DNS requests and replace the no-such-server answer with a "helpful"
2345 redirect to an advertising-driven search portal. Also work around
2346 DNS hijackers who "helpfully" decline to hijack known-invalid
2347 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
2348 lets you turn it off.
2349 - Send out a burst of long-range padding cells once we've established
2350 that we're reachable. Spread them over 4 circuits, so hopefully
2351 a few will be fast. This exercises our bandwidth and bootstraps
2352 us into the directory more quickly.
2354 o New/improved config options:
2355 - Add new config option "ResolvConf" to let the server operator
2356 choose an alternate resolve.conf file when using eventdns.
2357 - Add an "EnforceDistinctSubnets" option to control our "exclude
2358 servers on the same /16" behavior. It's still on by default; this
2359 is mostly for people who want to operate private test networks with
2360 all the machines on the same subnet.
2361 - If one of our entry guards is on the ExcludeNodes list, or the
2362 directory authorities don't think it's a good guard, treat it as
2363 if it were unlisted: stop using it as a guard, and throw it off
2364 the guards list if it stays that way for a long time.
2365 - Allow directory authorities to be marked separately as authorities
2366 for the v1 directory protocol, the v2 directory protocol, and
2367 as hidden service directories, to make it easier to retire old
2368 authorities. V1 authorities should set "HSAuthoritativeDir 1"
2369 to continue being hidden service authorities too.
2370 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
2372 o Minor features, controller:
2373 - Fix CIRC controller events so that controllers can learn the
2374 identity digests of non-Named servers used in circuit paths.
2375 - Let controllers ask for more useful identifiers for servers. Instead
2376 of learning identity digests for un-Named servers and nicknames
2377 for Named servers, the new identifiers include digest, nickname,
2378 and indication of Named status. Off by default; see control-spec.txt
2379 for more information.
2380 - Add a "getinfo address" controller command so it can display Tor's
2381 best guess to the user.
2382 - New controller event to alert the controller when our server
2383 descriptor has changed.
2384 - Give more meaningful errors on controller authentication failure.
2386 o Minor features, other:
2387 - When asked to resolve a hostname, don't use non-exit servers unless
2388 requested to do so. This allows servers with broken DNS to be
2389 useful to the network.
2390 - Divide eventdns log messages into warn and info messages.
2391 - Reserve the nickname "Unnamed" for routers that can't pick
2392 a hostname: any router can call itself Unnamed; directory
2393 authorities will never allocate Unnamed to any particular router;
2394 clients won't believe that any router is the canonical Unnamed.
2395 - Only include function names in log messages for info/debug messages.
2396 For notice/warn/err, the content of the message should be clear on
2397 its own, and printing the function name only confuses users.
2398 - Avoid some false positives during reachability testing: don't try
2399 to test via a server that's on the same /24 as us.
2400 - If we fail to build a circuit to an intended enclave, and it's
2401 not mandatory that we use that enclave, stop wanting it.
2402 - When eventdns is enabled, allow multithreaded builds on NetBSD and
2403 OpenBSD. (We had previously disabled threads on these platforms
2404 because they didn't have working thread-safe resolver functions.)
2406 o Major bugfixes, anonymity/security:
2407 - If a client asked for a server by name, and there's a named server
2408 in our network-status but we don't have its descriptor yet, we
2409 could return an unnamed server instead.
2410 - Fix NetBSD bug that could allow someone to force uninitialized RAM
2411 to be sent to a server's DNS resolver. This only affects NetBSD
2412 and other platforms that do not bounds-check tolower().
2413 - Reject (most) attempts to use Tor circuits with length one. (If
2414 many people start using Tor as a one-hop proxy, exit nodes become
2415 a more attractive target for compromise.)
2416 - Just because your DirPort is open doesn't mean people should be
2417 able to remotely teach you about hidden service descriptors. Now
2418 only accept rendezvous posts if you've got HSAuthoritativeDir set.
2420 o Major bugfixes, other:
2421 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
2422 - When a client asks the server to resolve (not connect to)
2423 an address, and it has a cached answer, give them the cached answer.
2424 Previously, the server would give them no answer at all.
2425 - Allow really slow clients to not hang up five minutes into their
2426 directory downloads (suggested by Adam J. Richter).
2427 - We were building exactly the wrong circuits when we anticipated
2428 hidden service requirements, meaning Tor would have to build all
2429 its circuits on demand.
2430 - Avoid crashing when we mmap a router cache file of size 0.
2431 - When testing reachability of our DirPort, don't launch new
2432 tests when there's already one in progress -- unreachable
2433 servers were stacking up dozens of testing streams.
2435 o Minor bugfixes, correctness:
2436 - If we're a directory mirror and we ask for "all" network status
2437 documents, we would discard status documents from authorities
2439 - Avoid a memory corruption bug when creating a hash table for
2441 - Avoid controller-triggered crash when misusing certain commands
2442 from a v0 controller on platforms that do not handle
2443 printf("%s",NULL) gracefully.
2444 - Don't crash when a controller sends a third argument to an
2445 "extendcircuit" request.
2446 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
2447 response; fix error code when "getinfo dir/status/" fails.
2448 - Avoid crash when telling controller stream-status and a stream
2450 - Patch from Adam Langley to fix assert() in eventdns.c.
2451 - Fix a debug log message in eventdns to say "X resolved to Y"
2452 instead of "X resolved to X".
2453 - Make eventdns give strings for DNS errors, not just error numbers.
2454 - Track unreachable entry guards correctly: don't conflate
2455 'unreachable by us right now' with 'listed as down by the directory
2456 authorities'. With the old code, if a guard was unreachable by
2457 us but listed as running, it would clog our guard list forever.
2458 - Behave correctly in case we ever have a network with more than
2459 2GB/s total advertised capacity.
2460 - Make TrackExitHosts case-insensitive, and fix the behavior of
2461 ".suffix" TrackExitHosts items to avoid matching in the middle of
2463 - Finally fix the openssl warnings from newer gccs that believe that
2464 ignoring a return value is okay, but casting a return value and
2465 then ignoring it is a sign of madness.
2466 - Prevent the contrib/exitlist script from printing the same
2467 result more than once.
2468 - Patch from Steve Hildrey: Generate network status correctly on
2469 non-versioning dirservers.
2470 - Don't listen to the X-Your-Address-Is hint if you did the lookup
2471 via Tor; otherwise you'll think you're the exit node's IP address.
2473 o Minor bugfixes, performance:
2474 - Two small performance improvements on parsing descriptors.
2475 - Major performance improvement on inserting descriptors: change
2476 algorithm from O(n^2) to O(n).
2477 - Make the common memory allocation path faster on machines where
2478 malloc(0) returns a pointer.
2479 - Start remembering X-Your-Address-Is directory hints even if you're
2480 a client, so you can become a server more smoothly.
2481 - Avoid duplicate entries on MyFamily line in server descriptor.
2483 o Packaging, features:
2484 - Remove architecture from OS X builds. The official builds are
2485 now universal binaries.
2486 - The Debian package now uses --verify-config when (re)starting,
2487 to distinguish configuration errors from other errors.
2488 - Update RPMs to require libevent 1.1b.
2490 o Packaging, bugfixes:
2491 - Patches so Tor builds with MinGW on Windows.
2492 - Patches so Tor might run on Cygwin again.
2493 - Resume building on non-gcc compilers and ancient gcc. Resume
2494 building with the -O0 compile flag. Resume building cleanly on
2496 - Run correctly on OS X platforms with case-sensitive filesystems.
2497 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
2498 - Add autoconf checks so Tor can build on Solaris x86 again.
2501 - Documented (and renamed) ServerDNSSearchDomains and
2502 ServerDNSResolvConfFile options.
2503 - Be clearer that the *ListenAddress directives can be repeated
2507 Changes in version 0.1.1.24 - 2006-09-29
2509 - Allow really slow clients to not hang up five minutes into their
2510 directory downloads (suggested by Adam J. Richter).
2511 - Fix major performance regression from 0.1.0.x: instead of checking
2512 whether we have enough directory information every time we want to
2513 do something, only check when the directory information has changed.
2514 This should improve client CPU usage by 25-50%.
2515 - Don't crash if, after a server has been running for a while,
2516 it can't resolve its hostname.
2519 - Allow Tor to start when RunAsDaemon is set but no logs are set.
2520 - Don't crash when the controller receives a third argument to an
2521 "extendcircuit" request.
2522 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
2523 response; fix error code when "getinfo dir/status/" fails.
2524 - Fix configure.in to not produce broken configure files with
2525 more recent versions of autoconf. Thanks to Clint for his auto*
2527 - Fix security bug on NetBSD that could allow someone to force
2528 uninitialized RAM to be sent to a server's DNS resolver. This
2529 only affects NetBSD and other platforms that do not bounds-check
2531 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
2532 methods: these are known to be buggy.
2533 - If we're a directory mirror and we ask for "all" network status
2534 documents, we would discard status documents from authorities
2538 Changes in version 0.1.2.1-alpha - 2006-08-27
2540 - Add "eventdns" async dns library from Adam Langley, tweaked to
2541 build on OSX and Windows. Only enabled if you pass the
2542 --enable-eventdns argument to configure.
2543 - Allow servers with no hostname or IP address to learn their
2544 IP address by asking the directory authorities. This code only
2545 kicks in when you would normally have exited with a "no address"
2546 error. Nothing's authenticated, so use with care.
2547 - Rather than waiting a fixed amount of time between retrying
2548 application connections, we wait only 5 seconds for the first,
2549 10 seconds for the second, and 15 seconds for each retry after
2550 that. Hopefully this will improve the expected user experience.
2551 - Patch from Tup to add support for transparent AP connections:
2552 this basically bundles the functionality of trans-proxy-tor
2553 into the Tor mainline. Now hosts with compliant pf/netfilter
2554 implementations can redirect TCP connections straight to Tor
2555 without diverting through SOCKS. Needs docs.
2556 - Busy directory servers save lots of memory by spooling server
2557 descriptors, v1 directories, and v2 networkstatus docs to buffers
2558 as needed rather than en masse. Also mmap the cached-routers
2559 files, so we don't need to keep the whole thing in memory too.
2560 - Automatically avoid picking more than one node from the same
2561 /16 network when constructing a circuit.
2562 - Revise and clean up the torrc.sample that we ship with; add
2563 a section for BandwidthRate and BandwidthBurst.
2566 - Split circuit_t into origin_circuit_t and or_circuit_t, and
2567 split connection_t into edge, or, dir, control, and base structs.
2568 These will save quite a bit of memory on busy servers, and they'll
2569 also help us track down bugs in the code and bugs in the spec.
2570 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
2571 or later. Log when we are doing this, so we can diagnose it when
2572 it fails. (Also, recommend libevent 1.1b for kqueue and
2573 win32 methods; deprecate libevent 1.0b harder; make libevent
2574 recommendation system saner.)
2575 - Start being able to build universal binaries on OS X (thanks
2577 - Export the default exit policy via the control port, so controllers
2578 don't need to guess what it is / will be later.
2579 - Add a man page entry for ProtocolWarnings.
2580 - Add TestVia config option to the man page.
2581 - Remove even more protocol-related warnings from Tor server logs,
2582 such as bad TLS handshakes and malformed begin cells.
2583 - Stop fetching descriptors if you're not a dir mirror and you
2584 haven't tried to establish any circuits lately. [This currently
2585 causes some dangerous behavior, because when you start up again
2586 you'll use your ancient server descriptors.]
2587 - New DirPort behavior: if you have your dirport set, you download
2588 descriptors aggressively like a directory mirror, whether or not
2590 - Get rid of the router_retry_connections notion. Now routers
2591 no longer try to rebuild long-term connections to directory
2592 authorities, and directory authorities no longer try to rebuild
2593 long-term connections to all servers. We still don't hang up
2594 connections in these two cases though -- we need to look at it
2595 more carefully to avoid flapping, and we likely need to wait til
2596 0.1.1.x is obsolete.
2597 - Drop compatibility with obsolete Tors that permit create cells
2598 to have the wrong circ_id_type.
2599 - Re-enable per-connection rate limiting. Get rid of the "OP
2600 bandwidth" concept. Lay groundwork for "bandwidth classes" --
2601 separate global buckets that apply depending on what sort of conn
2603 - Start publishing one minute or so after we find our ORPort
2604 to be reachable. This will help reduce the number of descriptors
2605 we have for ourselves floating around, since it's quite likely
2606 other things (e.g. DirPort) will change during that minute too.
2607 - Fork the v1 directory protocol into its own spec document,
2608 and mark dir-spec.txt as the currently correct (v2) spec.
2611 - When we find our DirPort to be reachable, publish a new descriptor
2612 so we'll tell the world (reported by pnx).
2613 - Publish a new descriptor after we hup/reload. This is important
2614 if our config has changed such that we'll want to start advertising
2615 our DirPort now, etc.
2616 - Allow Tor to start when RunAsDaemon is set but no logs are set.
2617 - When we have a state file we cannot parse, tell the user and
2618 move it aside. Now we avoid situations where the user starts
2619 Tor in 1904, Tor writes a state file with that timestamp in it,
2620 the user fixes her clock, and Tor refuses to start.
2621 - Fix configure.in to not produce broken configure files with
2622 more recent versions of autoconf. Thanks to Clint for his auto*
2624 - "tor --verify-config" now exits with -1(255) or 0 depending on
2625 whether the config options are bad or good.
2626 - Resolve bug 321 when using dnsworkers: append a period to every
2627 address we resolve at the exit node, so that we do not accidentally
2628 pick up local addresses, and so that failing searches are retried
2629 in the resolver search domains. (This is already solved for
2630 eventdns.) (This breaks Blossom servers for now.)
2631 - If we are using an exit enclave and we can't connect, e.g. because
2632 its webserver is misconfigured to not listen on localhost, then
2633 back off and try connecting from somewhere else before we fail.
2636 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
2637 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
2638 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
2639 when the IP address is mapped through MapAddress to a hostname.
2640 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
2641 useless IPv6 DNS resolves.
2642 - Patch suggested by Karsten Loesing: respond to SIGNAL command
2643 before we execute the signal, in case the signal shuts us down.
2644 - Clean up AllowInvalidNodes man page entry.
2645 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
2646 - Add more asserts to track down an assert error on a windows Tor
2647 server with connection_add being called with socket == -1.
2648 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
2649 - Fix misleading log messages: an entry guard that is "unlisted",
2650 as well as not known to be "down" (because we've never heard
2651 of it), is not therefore "up".
2652 - Remove code to special-case "-cvs" ending, since it has not
2653 actually mattered since 0.0.9.
2654 - Make our socks5 handling more robust to broken socks clients:
2655 throw out everything waiting on the buffer in between socks
2656 handshake phases, since they can't possibly (so the theory
2657 goes) have predicted what we plan to respond to them.
2660 Changes in version 0.1.1.23 - 2006-07-30
2662 - Fast Tor servers, especially exit nodes, were triggering asserts
2663 due to a bug in handling the list of pending DNS resolves. Some
2664 bugs still remain here; we're hunting them.
2665 - Entry guards could crash clients by sending unexpected input.
2666 - More fixes on reachability testing: if you find yourself reachable,
2667 then don't ever make any client requests (so you stop predicting
2668 circuits), then hup or have your clock jump, then later your IP
2669 changes, you won't think circuits are working, so you won't try to
2670 test reachability, so you won't publish.
2673 - Avoid a crash if the controller does a resetconf firewallports
2674 and then a setconf fascistfirewall=1.
2675 - Avoid an integer underflow when the dir authority decides whether
2676 a router is stable: we might wrongly label it stable, and compute
2677 a slightly wrong median stability, when a descriptor is published
2679 - Fix a place where we might trigger an assert if we can't build our
2680 own server descriptor yet.
2683 Changes in version 0.1.1.22 - 2006-07-05
2685 - Fix a big bug that was causing servers to not find themselves
2686 reachable if they changed IP addresses. Since only 0.1.1.22+
2687 servers can do reachability testing correctly, now we automatically
2688 make sure to test via one of these.
2689 - Fix to allow clients and mirrors to learn directory info from
2690 descriptor downloads that get cut off partway through.
2691 - Directory authorities had a bug in deciding if a newly published
2692 descriptor was novel enough to make everybody want a copy -- a few
2693 servers seem to be publishing new descriptors many times a minute.
2695 - Fix a rare bug that was causing some servers to complain about
2696 "closing wedged cpuworkers" and skip some circuit create requests.
2697 - Make the Exit flag in directory status documents actually work.
2700 Changes in version 0.1.1.21 - 2006-06-10
2701 o Crash and assert fixes from 0.1.1.20:
2702 - Fix a rare crash on Tor servers that have enabled hibernation.
2703 - Fix a seg fault on startup for Tor networks that use only one
2704 directory authority.
2705 - Fix an assert from a race condition that occurs on Tor servers
2706 while exiting, where various threads are trying to log that they're
2707 exiting, and delete the logs, at the same time.
2708 - Make our unit tests pass again on certain obscure platforms.
2711 - Add support for building SUSE RPM packages.
2712 - Speed up initial bootstrapping for clients: if we are making our
2713 first ever connection to any entry guard, then don't mark it down
2715 - When only one Tor server in the network is labelled as a guard,
2716 and we've already picked him, we would cycle endlessly picking him
2717 again, being unhappy about it, etc. Now we specifically exclude
2718 current guards when picking a new guard.
2719 - Servers send create cells more reliably after the TLS connection
2720 is established: we were sometimes forgetting to send half of them
2721 when we had more than one pending.
2722 - If we get a create cell that asks us to extend somewhere, but the
2723 Tor server there doesn't match the expected digest, we now send
2724 a destroy cell back, rather than silently doing nothing.
2725 - Make options->RedirectExit work again.
2726 - Make cookie authentication for the controller work again.
2727 - Stop being picky about unusual characters in the arguments to
2728 mapaddress. It's none of our business.
2729 - Add a new config option "TestVia" that lets you specify preferred
2730 middle hops to use for test circuits. Perhaps this will let me
2731 debug the reachability problems better.
2733 o Log / documentation fixes:
2734 - If we're a server and some peer has a broken TLS certificate, don't
2735 log about it unless ProtocolWarnings is set, i.e., we want to hear
2736 about protocol violations by others.
2737 - Fix spelling of VirtualAddrNetwork in man page.
2738 - Add a better explanation at the top of the autogenerated torrc file
2739 about what happened to our old torrc.
2742 Changes in version 0.1.1.20 - 2006-05-23
2744 - Downgrade a log severity where servers complain that they're
2746 - Avoid a compile warning on FreeBSD.
2747 - Remove string size limit on NEWDESC messages; solve bug 291.
2748 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
2749 more thoroughly when we're running on windows.
2752 Changes in version 0.1.1.19-rc - 2006-05-03
2754 - Regenerate our local descriptor if it's dirty and we try to use
2755 it locally (e.g. if it changes during reachability detection).
2756 - If we setconf our ORPort to 0, we continued to listen on the
2757 old ORPort and receive connections.
2758 - Avoid a second warning about machine/limits.h on Debian
2760 - Be willing to add our own routerinfo into the routerlist.
2761 Now authorities will include themselves in their directories
2762 and network-statuses.
2763 - Stop trying to upload rendezvous descriptors to every
2764 directory authority: only try the v1 authorities.
2765 - Servers no longer complain when they think they're not
2766 registered with the directory authorities. There were too many
2768 - Backport dist-rpm changes so rpms can be built without errors.
2771 - Implement an option, VirtualAddrMask, to set which addresses
2772 get handed out in response to mapaddress requests. This works
2773 around a bug in tsocks where 127.0.0.0/8 is never socksified.
2776 Changes in version 0.1.1.18-rc - 2006-04-10
2778 - Work harder to download live network-statuses from all the
2779 directory authorities we know about. Improve the threshold
2780 decision logic so we're more robust to edge cases.
2781 - When fetching rendezvous descriptors, we were willing to ask
2782 v2 authorities too, which would always return 404.
2785 - Stop listing down or invalid nodes in the v1 directory. This will
2786 reduce its bulk by about 1/3, and reduce load on directory
2788 - When deciding whether a router is Fast or Guard-worthy, consider
2789 his advertised BandwidthRate and not just the BandwidthCapacity.
2790 - No longer ship INSTALL and README files -- they are useless now.
2791 - Force rpmbuild to behave and honor target_cpu.
2792 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
2793 - Start to include translated versions of the tor-doc-*.html
2794 files, along with the screenshots. Still needs more work.
2795 - Start sending back 512 and 451 errors if mapaddress fails,
2796 rather than not sending anything back at all.
2797 - When we fail to bind or listen on an incoming or outgoing
2798 socket, we should close it before failing. otherwise we just
2799 leak it. (thanks to weasel for finding.)
2800 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
2801 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
2802 - Make NoPublish (even though deprecated) work again.
2803 - Fix a minor security flaw where a versioning auth dirserver
2804 could list a recommended version many times in a row to make
2805 clients more convinced that it's recommended.
2806 - Fix crash bug if there are two unregistered servers running
2807 with the same nickname, one of them is down, and you ask for
2808 them by nickname in your EntryNodes or ExitNodes. Also, try
2809 to pick the one that's running rather than an arbitrary one.
2810 - Fix an infinite loop we could hit if we go offline for too long.
2811 - Complain when we hit WSAENOBUFS on recv() or write() too.
2812 Perhaps this will help us hunt the bug.
2813 - If you're not a versioning dirserver, don't put the string
2814 "client-versions \nserver-versions \n" in your network-status.
2815 - Lower the minimum required number of file descriptors to 1000,
2816 so we can have some overhead for Valgrind on Linux, where the
2817 default ulimit -n is 1024.
2820 - Add tor.dizum.com as the fifth authoritative directory server.
2821 - Add a new config option FetchUselessDescriptors, off by default,
2822 for when you plan to run "exitlist" on your client and you want
2823 to know about even the non-running descriptors.
2826 Changes in version 0.1.1.17-rc - 2006-03-28
2828 - Clients and servers since 0.1.1.10-alpha have been expiring
2829 connections whenever they are idle for 5 minutes and they *do*
2830 have circuits on them. Oops. With this new version, clients will
2831 discard their previous entry guard choices and avoid choosing
2832 entry guards running these flawed versions.
2833 - Fix memory leak when uncompressing concatenated zlib streams. This
2834 was causing substantial leaks over time on Tor servers.
2835 - The v1 directory was including servers as much as 48 hours old,
2836 because that's how the new routerlist->routers works. Now only
2837 include them if they're 20 hours old or less.
2840 - Resume building on irix64, netbsd 2.0, etc.
2841 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
2843 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
2844 and it is confusing some users.
2845 - Mirrors stop caching the v1 directory so often.
2846 - Make the max number of old descriptors that a cache will hold
2847 rise with the number of directory authorities, so we can scale.
2848 - Change our win32 uname() hack to be more forgiving about what
2849 win32 versions it thinks it's found.
2852 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
2854 - When the controller's *setconf commands fail, collect an error
2855 message in a string and hand it back to the controller.
2856 - Make the v2 dir's "Fast" flag based on relative capacity, just
2857 like "Stable" is based on median uptime. Name everything in the
2858 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
2859 - Log server fingerprint on startup, so new server operators don't
2860 have to go hunting around their filesystem for it.
2861 - Return a robots.txt on our dirport to discourage google indexing.
2862 - Let the controller ask for GETINFO dir/status/foo so it can ask
2863 directly rather than connecting to the dir port. Only works when
2864 dirport is set for now.
2866 o New config options rather than constants in the code:
2867 - SocksTimeout: How long do we let a socks connection wait
2868 unattached before we fail it?
2869 - CircuitBuildTimeout: Cull non-open circuits that were born
2870 at least this many seconds ago.
2871 - CircuitIdleTimeout: Cull open clean circuits that were born
2872 at least this many seconds ago.
2875 Changes in version 0.1.1.16-rc - 2006-03-18
2876 o Bugfixes on 0.1.1.15-rc:
2877 - Fix assert when the controller asks to attachstream a connect-wait
2878 or resolve-wait stream.
2879 - Now do address rewriting when the controller asks us to attach
2880 to a particular circuit too. This will let Blossom specify
2881 "moria2.exit" without having to learn what moria2's IP address is.
2882 - Make the "tor --verify-config" command-line work again, so people
2883 can automatically check if their torrc will parse.
2884 - Authoritative dirservers no longer require an open connection from
2885 a server to consider him "reachable". We need this change because
2886 when we add new auth dirservers, old servers won't know not to
2888 - Let Tor build on Sun CC again.
2889 - Fix an off-by-one buffer size in dirserv.c that magically never
2890 hit our three authorities but broke sjmurdoch's own tor network.
2891 - If we as a directory mirror don't know of any v1 directory
2892 authorities, then don't try to cache any v1 directories.
2893 - Stop warning about unknown servers in our family when they are
2894 given as hex digests.
2895 - Stop complaining as quickly to the server operator that he
2896 hasn't registered his nickname/key binding.
2897 - Various cleanups so we can add new V2 Auth Dirservers.
2898 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
2899 reflect the updated flags in our v2 dir protocol.
2900 - Resume allowing non-printable characters for exit streams (both
2901 for connecting and for resolving). Now we tolerate applications
2902 that don't follow the RFCs. But continue to block malformed names
2905 o Bugfixes on 0.1.0.x:
2906 - Fix assert bug in close_logs(): when we close and delete logs,
2907 remove them all from the global "logfiles" list.
2908 - Fix minor integer overflow in calculating when we expect to use up
2909 our bandwidth allocation before hibernating.
2910 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
2911 there are multiple SSLs installed with different versions.
2912 - When we try to be a server and Address is not explicitly set and
2913 our hostname resolves to a private IP address, try to use an
2914 interface address if it has a public address. Now Windows machines
2915 that think of themselves as localhost can work by default.
2918 - Let the controller ask for GETINFO dir/server/foo so it can ask
2919 directly rather than connecting to the dir port.
2920 - Let the controller tell us about certain router descriptors
2921 that it doesn't want Tor to use in circuits. Implement
2922 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
2923 - New config option SafeSocks to reject all application connections
2924 using unsafe socks protocols. Defaults to off.
2927 Changes in version 0.1.1.15-rc - 2006-03-11
2928 o Bugfixes and cleanups:
2929 - When we're printing strings from the network, don't try to print
2930 non-printable characters. This protects us against shell escape
2931 sequence exploits, and also against attacks to fool humans into
2932 misreading their logs.
2933 - Fix a bug where Tor would fail to establish any connections if you
2934 left it off for 24 hours and then started it: we were happy with
2935 the obsolete network statuses, but they all referred to router
2936 descriptors that were too old to fetch, so we ended up with no
2937 valid router descriptors.
2938 - Fix a seg fault in the controller's "getinfo orconn-status"
2939 command while listing status on incoming handshaking connections.
2940 Introduce a status name "NEW" for these connections.
2941 - If we get a linelist or linelist_s config option from the torrc
2942 (e.g. ExitPolicy) and it has no value, warn and skip rather than
2943 silently resetting it to its default.
2944 - Don't abandon entry guards until they've been down or gone for
2946 - Cleaner and quieter log messages.
2949 - New controller signal NEWNYM that makes new application requests
2951 - Add a new circuit purpose 'controller' to let the controller ask
2952 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
2953 controller command to let you specify the purpose if you're
2954 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
2955 command to let you change a circuit's purpose after it's been
2957 - Accept "private:*" in routerdesc exit policies; not generated yet
2958 because older Tors do not understand it.
2959 - Add BSD-style contributed startup script "rc.subr" from Peter
2963 Changes in version 0.1.1.14-alpha - 2006-02-20
2964 o Bugfixes on 0.1.1.x:
2965 - Don't die if we ask for a stdout or stderr log (even implicitly)
2966 and we're set to RunAsDaemon -- just warn.
2967 - We still had a few bugs in the OR connection rotation code that
2968 caused directory servers to slowly aggregate connections to other
2969 fast Tor servers. This time for sure!
2970 - Make log entries on Win32 include the name of the function again.
2971 - We were treating a pair of exit policies if they were equal even
2972 if one said accept and the other said reject -- causing us to
2973 not always publish a new descriptor since we thought nothing
2975 - Retry pending server downloads as well as pending networkstatus
2976 downloads when we unexpectedly get a socks request.
2977 - We were ignoring the IS_FAST flag in the directory status,
2978 meaning we were willing to pick trivial-bandwidth nodes for "fast"
2980 - If the controller's SAVECONF command fails (e.g. due to file
2981 permissions), let the controller know that it failed.
2984 - If we're trying to be a Tor server and running Windows 95/98/ME
2985 as a server, explain that we'll likely crash.
2986 - When we're a server, a client asks for an old-style directory,
2987 and our write bucket is empty, don't give it to him. This way
2988 small servers can continue to serve the directory *sometimes*,
2989 without getting overloaded.
2990 - Compress exit policies even more -- look for duplicate lines
2992 - Clients now honor the "guard" flag in the router status when
2993 picking entry guards, rather than looking at is_fast or is_stable.
2994 - Retain unrecognized lines in $DATADIR/state file, so that we can
2995 be forward-compatible.
2996 - Generate 18.0.0.0/8 address policy format in descs when we can;
2997 warn when the mask is not reducible to a bit-prefix.
2998 - Let the user set ControlListenAddress in the torrc. This can be
2999 dangerous, but there are some cases (like a secured LAN) where it
3001 - Split ReachableAddresses into ReachableDirAddresses and
3002 ReachableORAddresses, so we can restrict Dir conns to port 80
3003 and OR conns to port 443.
3004 - Now we can target arch and OS in rpm builds (contributed by
3005 Phobos). Also make the resulting dist-rpm filename match the
3007 - New config options to help controllers: FetchServerDescriptors
3008 and FetchHidServDescriptors for whether to fetch server
3009 info and hidserv info or let the controller do it, and
3010 PublishServerDescriptor and PublishHidServDescriptors.
3011 - Also let the controller set the __AllDirActionsPrivate config
3012 option if you want all directory fetches/publishes to happen via
3013 Tor (it assumes your controller bootstraps your circuits).
3016 Changes in version 0.1.0.17 - 2006-02-17
3017 o Crash bugfixes on 0.1.0.x:
3018 - When servers with a non-zero DirPort came out of hibernation,
3019 sometimes they would trigger an assert.
3021 o Other important bugfixes:
3022 - On platforms that don't have getrlimit (like Windows), we were
3023 artificially constraining ourselves to a max of 1024
3024 connections. Now just assume that we can handle as many as 15000
3025 connections. Hopefully this won't cause other problems.
3027 o Backported features:
3028 - When we're a server, a client asks for an old-style directory,
3029 and our write bucket is empty, don't give it to him. This way
3030 small servers can continue to serve the directory *sometimes*,
3031 without getting overloaded.
3032 - Whenever you get a 503 in response to a directory fetch, try
3033 once more. This will become important once servers start sending
3034 503's whenever they feel busy.
3035 - Fetch a new directory every 120 minutes, not every 40 minutes.
3036 Now that we have hundreds of thousands of users running the old
3037 directory algorithm, it's starting to hurt a lot.
3038 - Bump up the period for forcing a hidden service descriptor upload
3039 from 20 minutes to 1 hour.
3042 Changes in version 0.1.1.13-alpha - 2006-02-09
3043 o Crashes in 0.1.1.x:
3044 - When you tried to setconf ORPort via the controller, Tor would
3045 crash. So people using TorCP to become a server were sad.
3046 - Solve (I hope) the stack-smashing bug that we were seeing on fast
3047 servers. The problem appears to be something do with OpenSSL's
3048 random number generation, or how we call it, or something. Let me
3049 know if the crashes continue.
3050 - Turn crypto hardware acceleration off by default, until we find
3051 somebody smart who can test it for us. (It appears to produce
3052 seg faults in at least some cases.)
3053 - Fix a rare assert error when we've tried all intro points for
3054 a hidden service and we try fetching the service descriptor again:
3055 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
3058 - Fix a major load balance bug: we were round-robining in 16 KB
3059 chunks, and servers with bandwidthrate of 20 KB, while downloading
3060 a 600 KB directory, would starve their other connections. Now we
3061 try to be a bit more fair.
3062 - Dir authorities and mirrors were never expiring the newest
3063 descriptor for each server, causing memory and directory bloat.
3064 - Fix memory-bloating and connection-bloating bug on servers: We
3065 were never closing any connection that had ever had a circuit on
3066 it, because we were checking conn->n_circuits == 0, yet we had a
3067 bug that let it go negative.
3068 - Make Tor work using squid as your http proxy again -- squid
3069 returns an error if you ask for a URL that's too long, and it uses
3070 a really generic error message. Plus, many people are behind a
3071 transparent squid so they don't even realize it.
3072 - On platforms that don't have getrlimit (like Windows), we were
3073 artificially constraining ourselves to a max of 1024
3074 connections. Now just assume that we can handle as many as 15000
3075 connections. Hopefully this won't cause other problems.
3076 - Add a new config option ExitPolicyRejectPrivate which defaults to
3077 1. This means all exit policies will begin with rejecting private
3078 addresses, unless the server operator explicitly turns it off.
3081 - Clients no longer download descriptors for non-running
3083 - Before we add new directory authorities, we should make it
3084 clear that only v1 authorities should receive/publish hidden
3085 service descriptors.
3088 - As soon as we've fetched some more directory info, immediately
3089 try to download more server descriptors. This way we don't have
3090 a 10 second pause during initial bootstrapping.
3091 - Remove even more loud log messages that the server operator can't
3093 - When we're running an obsolete or un-recommended version, make
3094 the log message more clear about what the problem is and what
3095 versions *are* still recommended.
3096 - Provide a more useful warn message when our onion queue gets full:
3097 the CPU is too slow or the exit policy is too liberal.
3098 - Don't warn when we receive a 503 from a dirserver/cache -- this
3099 will pave the way for them being able to refuse if they're busy.
3100 - When we fail to bind a listener, try to provide a more useful
3101 log message: e.g., "Is Tor already running?"
3102 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
3103 Goldberg can prove things about our handshake protocol more
3105 - MaxConn has been obsolete for a while now. Document the ConnLimit
3106 config option, which is a *minimum* number of file descriptors
3107 that must be available else Tor refuses to start.
3108 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
3109 if you log to syslog and want something other than LOG_DAEMON.
3110 - Make dirservers generate a separate "guard" flag to mean,
3111 "would make a good entry guard". Make clients parse it and vote
3112 on it. Not used by clients yet.
3113 - Implement --with-libevent-dir option to ./configure. Also, improve
3114 search techniques to find libevent, and use those for openssl too.
3115 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
3116 - Only start testing reachability once we've established a
3117 circuit. This will make startup on dirservers less noisy.
3118 - Don't try to upload hidden service descriptors until we have
3119 established a circuit.
3120 - Fix the controller's "attachstream 0" command to treat conn like
3121 it just connected, doing address remapping, handling .exit and
3122 .onion idioms, and so on. Now we're more uniform in making sure
3123 that the controller hears about new and closing connections.
3126 Changes in version 0.1.1.12-alpha - 2006-01-11
3127 o Bugfixes on 0.1.1.x:
3128 - The fix to close duplicate server connections was closing all
3129 Tor client connections if they didn't establish a circuit
3130 quickly enough. Oops.
3131 - Fix minor memory issue (double-free) that happened on exit.
3133 o Bugfixes on 0.1.0.x:
3134 - Tor didn't warn when it failed to open a log file.
3137 Changes in version 0.1.1.11-alpha - 2006-01-10
3138 o Crashes in 0.1.1.x:
3139 - Include all the assert/crash fixes from 0.1.0.16.
3140 - If you start Tor and then quit very quickly, there were some
3141 races that tried to free things that weren't allocated yet.
3142 - Fix a rare memory stomp if you're running hidden services.
3143 - Fix segfault when specifying DirServer in config without nickname.
3144 - Fix a seg fault when you finish connecting to a server but at
3145 that moment you dump his server descriptor.
3146 - Extendcircuit and Attachstream controller commands would
3147 assert/crash if you don't give them enough arguments.
3148 - Fix an assert error when we're out of space in the connection_list
3149 and we try to post a hidden service descriptor (reported by weasel).
3150 - If you specify a relative torrc path and you set RunAsDaemon in
3151 your torrc, then it chdir()'s to the new directory. If you HUP,
3152 it tries to load the new torrc location, fails, and exits.
3153 The fix: no longer allow a relative path to torrc using -f.
3156 - Implement "entry guards": automatically choose a handful of entry
3157 nodes and stick with them for all circuits. Only pick new guards
3158 when the ones you have are unsuitable, and if the old guards
3159 become suitable again, switch back. This will increase security
3160 dramatically against certain end-point attacks. The EntryNodes
3161 config option now provides some hints about which entry guards you
3162 want to use most; and StrictEntryNodes means to only use those.
3163 - New directory logic: download by descriptor digest, not by
3164 fingerprint. Caches try to download all listed digests from
3165 authorities; clients try to download "best" digests from caches.
3166 This avoids partitioning and isolating attacks better.
3167 - Make the "stable" router flag in network-status be the median of
3168 the uptimes of running valid servers, and make clients pay
3169 attention to the network-status flags. Thus the cutoff adapts
3170 to the stability of the network as a whole, making IRC, IM, etc
3171 connections more reliable.
3174 - Tor servers with dynamic IP addresses were needing to wait 18
3175 hours before they could start doing reachability testing using
3176 the new IP address and ports. This is because they were using
3177 the internal descriptor to learn what to test, yet they were only
3178 rebuilding the descriptor once they decided they were reachable.
3179 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
3180 to download certain server descriptors, throw them away, and then
3181 fetch them again after 30 minutes. Now mirrors throw away these
3182 server descriptors so clients can't get them.
3183 - We were leaving duplicate connections to other ORs open for a week,
3184 rather than closing them once we detect a duplicate. This only
3185 really affected authdirservers, but it affected them a lot.
3186 - Spread the authdirservers' reachability testing over the entire
3187 testing interval, so we don't try to do 500 TLS's at once every
3191 - If the network is down, and we try to connect to a conn because
3192 we have a circuit in mind, and we timeout (30 seconds) because the
3193 network never answers, we were expiring the circuit, but we weren't
3194 obsoleting the connection or telling the entry_guards functions.
3195 - Some Tor servers process billions of cells per day. These statistics
3196 need to be uint64_t's.
3197 - Check for integer overflows in more places, when adding elements
3198 to smartlists. This could possibly prevent a buffer overflow
3199 on malicious huge inputs. I don't see any, but I haven't looked
3201 - ReachableAddresses kept growing new "reject *:*" lines on every
3203 - When you "setconf log" via the controller, it should remove all
3204 logs. We were automatically adding back in a "log notice stdout".
3205 - Newly bootstrapped Tor networks couldn't establish hidden service
3206 circuits until they had nodes with high uptime. Be more tolerant.
3207 - We were marking servers down when they could not answer every piece
3208 of the directory request we sent them. This was far too harsh.
3209 - Fix the torify (tsocks) config file to not use Tor for localhost
3211 - Directory authorities now go to the proper authority when asking for
3212 a networkstatus, even when they want a compressed one.
3213 - Fix a harmless bug that was causing Tor servers to log
3214 "Got an end because of misc error, but we're not an AP. Closing."
3215 - Authorities were treating their own descriptor changes as cosmetic,
3216 meaning the descriptor available in the network-status and the
3217 descriptor that clients downloaded were different.
3218 - The OS X installer was adding a symlink for tor_resolve but
3219 the binary was called tor-resolve (reported by Thomas Hardly).
3220 - Workaround a problem with some http proxies where they refuse GET
3221 requests that specify "Content-Length: 0" (reported by Adrian).
3222 - Fix wrong log message when you add a "HiddenServiceNodes" config
3223 line without any HiddenServiceDir line (reported by Chris Thomas).
3226 - Write the TorVersion into the state file so we have a prayer of
3227 keeping forward and backward compatibility.
3228 - Revive the FascistFirewall config option rather than eliminating it:
3229 now it's a synonym for ReachableAddresses *:80,*:443.
3230 - Clients choose directory servers from the network status lists,
3231 not from their internal list of router descriptors. Now they can
3232 go to caches directly rather than needing to go to authorities
3234 - Directory authorities ignore router descriptors that have only
3235 cosmetic differences: do this for 0.1.0.x servers now too.
3236 - Add a new flag to network-status indicating whether the server
3237 can answer v2 directory requests too.
3238 - Authdirs now stop whining so loudly about bad descriptors that
3239 they fetch from other dirservers. So when there's a log complaint,
3240 it's for sure from a freshly uploaded descriptor.
3241 - Reduce memory requirements in our structs by changing the order
3243 - There used to be two ways to specify your listening ports in a
3244 server descriptor: on the "router" line and with a separate "ports"
3245 line. Remove support for the "ports" line.
3246 - New config option "AuthDirRejectUnlisted" for auth dirservers as
3247 a panic button: if we get flooded with unusable servers we can
3248 revert to only listing servers in the approved-routers file.
3249 - Auth dir servers can now mark a fingerprint as "!reject" or
3250 "!invalid" in the approved-routers file (as its nickname), to
3251 refuse descriptors outright or include them but marked as invalid.
3252 - Servers store bandwidth history across restarts/crashes.
3253 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
3254 get a better idea of why their circuits failed. Not used yet.
3255 - Directory mirrors now cache up to 16 unrecognized network-status
3256 docs. Now we can add new authdirservers and they'll be cached too.
3257 - When picking a random directory, prefer non-authorities if any
3259 - New controller option "getinfo desc/all-recent" to fetch the
3260 latest server descriptor for every router that Tor knows about.
3263 Changes in version 0.1.0.16 - 2006-01-02
3264 o Crash bugfixes on 0.1.0.x:
3265 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
3266 corrupting the heap, losing FDs, or crashing when we need to resize
3267 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
3268 - It turns out sparc64 platforms crash on unaligned memory access
3269 too -- so detect and avoid this.
3270 - Handle truncated compressed data correctly (by detecting it and
3272 - Fix possible-but-unlikely free(NULL) in control.c.
3273 - When we were closing connections, there was a rare case that
3274 stomped on memory, triggering seg faults and asserts.
3275 - Avoid potential infinite recursion when building a descriptor. (We
3276 don't know that it ever happened, but better to fix it anyway.)
3277 - We were neglecting to unlink marked circuits from soon-to-close OR
3278 connections, which caused some rare scribbling on freed memory.
3279 - Fix a memory stomping race bug when closing the joining point of two
3280 rendezvous circuits.
3281 - Fix an assert in time parsing found by Steven Murdoch.
3283 o Other bugfixes on 0.1.0.x:
3284 - When we're doing reachability testing, provide more useful log
3285 messages so the operator knows what to expect.
3286 - Do not check whether DirPort is reachable when we are suppressing
3287 advertising it because of hibernation.
3288 - When building with -static or on Solaris, we sometimes needed -ldl.
3289 - When we're deciding whether a stream has enough circuits around
3290 that can handle it, count the freshly dirty ones and not the ones
3291 that are so dirty they won't be able to handle it.
3292 - When we're expiring old circuits, we had a logic error that caused
3293 us to close new rendezvous circuits rather than old ones.
3294 - Give a more helpful log message when you try to change ORPort via
3295 the controller: you should upgrade Tor if you want that to work.
3296 - We were failing to parse Tor versions that start with "Tor ".
3297 - Tolerate faulty streams better: when a stream fails for reason
3298 exitpolicy, stop assuming that the router is lying about his exit
3299 policy. When a stream fails for reason misc, allow it to retry just
3300 as if it was resolvefailed. When a stream has failed three times,
3301 reset its failure count so we can try again and get all three tries.
3304 Changes in version 0.1.1.10-alpha - 2005-12-11
3305 o Correctness bugfixes on 0.1.0.x:
3306 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
3307 corrupting the heap, losing FDs, or crashing when we need to resize
3308 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
3309 - Stop doing the complex voodoo overkill checking for insecure
3310 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
3311 - When we were closing connections, there was a rare case that
3312 stomped on memory, triggering seg faults and asserts.
3313 - We were neglecting to unlink marked circuits from soon-to-close OR
3314 connections, which caused some rare scribbling on freed memory.
3315 - When we're deciding whether a stream has enough circuits around
3316 that can handle it, count the freshly dirty ones and not the ones
3317 that are so dirty they won't be able to handle it.
3318 - Recover better from TCP connections to Tor servers that are
3319 broken but don't tell you (it happens!); and rotate TLS
3320 connections once a week.
3321 - When we're expiring old circuits, we had a logic error that caused
3322 us to close new rendezvous circuits rather than old ones.
3323 - Fix a scary-looking but apparently harmless bug where circuits
3324 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
3325 servers, and never switch to state CIRCUIT_STATE_OPEN.
3326 - When building with -static or on Solaris, we sometimes needed to
3328 - Give a useful message when people run Tor as the wrong user,
3329 rather than telling them to start chowning random directories.
3330 - We were failing to inform the controller about new .onion streams.
3332 o Security bugfixes on 0.1.0.x:
3333 - Refuse server descriptors if the fingerprint line doesn't match
3334 the included identity key. Tor doesn't care, but other apps (and
3335 humans) might actually be trusting the fingerprint line.
3336 - We used to kill the circuit when we receive a relay command we
3337 don't recognize. Now we just drop it.
3338 - Start obeying our firewall options more rigorously:
3339 . If we can't get to a dirserver directly, try going via Tor.
3340 . Don't ever try to connect (as a client) to a place our
3341 firewall options forbid.
3342 . If we specify a proxy and also firewall options, obey the
3343 firewall options even when we're using the proxy: some proxies
3344 can only proxy to certain destinations.
3345 - Fix a bug found by Lasse Overlier: when we were making internal
3346 circuits (intended to be cannibalized later for rendezvous and
3347 introduction circuits), we were picking them so that they had
3348 useful exit nodes. There was no need for this, and it actually
3349 aids some statistical attacks.
3350 - Start treating internal circuits and exit circuits separately.
3351 It's important to keep them separate because internal circuits
3352 have their last hops picked like middle hops, rather than like
3353 exit hops. So exiting on them will break the user's expectations.
3355 o Bugfixes on 0.1.1.x:
3356 - Take out the mis-feature where we tried to detect IP address
3357 flapping for people with DynDNS, and chose not to upload a new
3358 server descriptor sometimes.
3359 - Try to be compatible with OpenSSL 0.9.6 again.
3360 - Log fix: when the controller is logging about .onion addresses,
3361 sometimes it didn't include the ".onion" part of the address.
3362 - Don't try to modify options->DirServers internally -- if the
3363 user didn't specify any, just add the default ones directly to
3364 the trusted dirserver list. This fixes a bug where people running
3365 controllers would use SETCONF on some totally unrelated config
3366 option, and Tor would start yelling at them about changing their
3368 - Let the controller's redirectstream command specify a port, in
3369 case the controller wants to change that too.
3370 - When we requested a pile of server descriptors, we sometimes
3371 accidentally launched a duplicate request for the first one.
3372 - Bugfix for trackhostexits: write down the fingerprint of the
3373 chosen exit, not its nickname, because the chosen exit might not
3375 - When parsing foo.exit, if foo is unknown, and we are leaving
3376 circuits unattached, set the chosen_exit field and leave the
3377 address empty. This matters because controllers got confused
3379 - Directory authorities no longer try to download server
3380 descriptors that they know they will reject.
3382 o Features and updates:
3383 - Replace balanced trees with hash tables: this should make stuff
3384 significantly faster.
3385 - Resume using the AES counter-mode implementation that we ship,
3386 rather than OpenSSL's. Ours is significantly faster.
3387 - Many other CPU and memory improvements.
3388 - Add a new config option FastFirstHopPK (on by default) so clients
3389 do a trivial crypto handshake for their first hop, since TLS has
3390 already taken care of confidentiality and authentication.
3391 - Add a new config option TestSocks so people can see if their
3392 applications are using socks4, socks4a, socks5-with-ip, or
3393 socks5-with-hostname. This way they don't have to keep mucking
3394 with tcpdump and wondering if something got cached somewhere.
3395 - Warn when listening on a public address for socks. I suspect a
3396 lot of people are setting themselves up as open socks proxies,
3397 and they have no idea that jerks on the Internet are using them,
3398 since they simply proxy the traffic into the Tor network.
3399 - Add "private:*" as an alias in configuration for policies. Now
3400 you can simplify your exit policy rather than needing to list
3401 every single internal or nonroutable network space.
3402 - Add a new controller event type that allows controllers to get
3403 all server descriptors that were uploaded to a router in its role
3404 as authoritative dirserver.
3405 - Start shipping socks-extensions.txt, tor-doc-unix.html,
3406 tor-doc-server.html, and stylesheet.css in the tarball.
3407 - Stop shipping tor-doc.html in the tarball.
3410 Changes in version 0.1.1.9-alpha - 2005-11-15
3411 o Usability improvements:
3412 - Start calling it FooListenAddress rather than FooBindAddress,
3413 since few of our users know what it means to bind an address
3415 - Reduce clutter in server logs. We're going to try to make
3416 them actually usable now. New config option ProtocolWarnings that
3417 lets you hear about how _other Tors_ are breaking the protocol. Off
3419 - Divide log messages into logging domains. Once we put some sort
3420 of interface on this, it will let people looking at more verbose
3421 log levels specify the topics they want to hear more about.
3422 - Make directory servers return better http 404 error messages
3423 instead of a generic "Servers unavailable".
3424 - Check for even more Windows version flags when writing the platform
3425 string in server descriptors, and note any we don't recognize.
3426 - Clean up more of the OpenSSL memory when exiting, so we can detect
3427 memory leaks better.
3428 - Make directory authorities be non-versioning, non-naming by
3429 default. Now we can add new directory servers without requiring
3430 their operators to pay close attention.
3431 - When logging via syslog, include the pid whenever we provide
3432 a log entry. Suggested by Todd Fries.
3434 o Performance improvements:
3435 - Directory servers now silently throw away new descriptors that
3436 haven't changed much if the timestamps are similar. We do this to
3437 tolerate older Tor servers that upload a new descriptor every 15
3438 minutes. (It seemed like a good idea at the time.)
3439 - Inline bottleneck smartlist functions; use fast versions by default.
3440 - Add a "Map from digest to void*" abstraction digestmap_t so we
3441 can do less hex encoding/decoding. Use it in router_get_by_digest()
3442 to resolve a performance bottleneck.
3443 - Allow tor_gzip_uncompress to extract as much as possible from
3444 truncated compressed data. Try to extract as many
3445 descriptors as possible from truncated http responses (when
3446 DIR_PURPOSE_FETCH_ROUTERDESC).
3447 - Make circ->onionskin a pointer, not a static array. moria2 was using
3448 125000 circuit_t's after it had been up for a few weeks, which
3449 translates to 20+ megs of wasted space.
3450 - The private half of our EDH handshake keys are now chosen out
3451 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
3453 o Security improvements:
3454 - Start making directory caches retain old routerinfos, so soon
3455 clients can start asking by digest of descriptor rather than by
3456 fingerprint of server.
3457 - Add half our entropy from RAND_poll in OpenSSL. This knows how
3458 to use egd (if present), openbsd weirdness (if present), vms/os2
3459 weirdness (if we ever port there), and more in the future.
3461 o Bugfixes on 0.1.0.x:
3462 - Do round-robin writes of at most 16 kB per write. This might be
3463 more fair on loaded Tor servers, and it might resolve our Windows
3464 crash bug. It might also slow things down.
3465 - Our TLS handshakes were generating a single public/private
3466 keypair for the TLS context, rather than making a new one for
3467 each new connections. Oops. (But we were still rotating them
3468 periodically, so it's not so bad.)
3469 - When we were cannibalizing a circuit with a particular exit
3470 node in mind, we weren't checking to see if that exit node was
3471 already present earlier in the circuit. Oops.
3472 - When a Tor server's IP changes (e.g. from a dyndns address),
3473 upload a new descriptor so clients will learn too.
3474 - Really busy servers were keeping enough circuits open on stable
3475 connections that they were wrapping around the circuit_id
3476 space. (It's only two bytes.) This exposed a bug where we would
3477 feel free to reuse a circuit_id even if it still exists but has
3478 been marked for close. Try to fix this bug. Some bug remains.
3479 - If we would close a stream early (e.g. it asks for a .exit that
3480 we know would refuse it) but the LeaveStreamsUnattached config
3481 option is set by the controller, then don't close it.
3483 o Bugfixes on 0.1.1.8-alpha:
3484 - Fix a big pile of memory leaks, some of them serious.
3485 - Do not try to download a routerdesc if we would immediately reject
3487 - Resume inserting a newline between all router descriptors when
3488 generating (old style) signed directories, since our spec says
3490 - When providing content-type application/octet-stream for
3491 server descriptors using .z, we were leaving out the
3492 content-encoding header. Oops. (Everything tolerated this just
3493 fine, but that doesn't mean we need to be part of the problem.)
3494 - Fix a potential seg fault in getconf and getinfo using version 1
3495 of the controller protocol.
3496 - Avoid crash: do not check whether DirPort is reachable when we
3497 are suppressing it because of hibernation.
3498 - Make --hash-password not crash on exit.
3501 Changes in version 0.1.1.8-alpha - 2005-10-07
3502 o New features (major):
3503 - Clients don't download or use the directory anymore. Now they
3504 download and use network-statuses from the trusted dirservers,
3505 and fetch individual server descriptors as needed from mirrors.
3506 See dir-spec.txt for all the gory details.
3507 - Be more conservative about whether to advertise our DirPort.
3508 The main change is to not advertise if we're running at capacity
3509 and either a) we could hibernate or b) our capacity is low and
3510 we're using a default DirPort.
3511 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
3513 o New features (minor):
3514 - Try to be smart about when to retry network-status and
3515 server-descriptor fetches. Still needs some tuning.
3516 - Stop parsing, storing, or using running-routers output (but
3517 mirrors still cache and serve it).
3518 - Consider a threshold of versioning dirservers (dirservers who have
3519 an opinion about which Tor versions are still recommended) before
3520 deciding whether to warn the user that he's obsolete.
3521 - Dirservers can now reject/invalidate by key and IP, with the
3522 config options "AuthDirInvalid" and "AuthDirReject". This is
3523 useful since currently we automatically list servers as running
3524 and usable even if we know they're jerks.
3525 - Provide dire warnings to any users who set DirServer; move it out
3526 of torrc.sample and into torrc.complete.
3527 - Add MyFamily to torrc.sample in the server section.
3528 - Add nicknames to the DirServer line, so we can refer to them
3529 without requiring all our users to memorize their IP addresses.
3530 - When we get an EOF or a timeout on a directory connection, note
3531 how many bytes of serverdesc we are dropping. This will help
3532 us determine whether it is smart to parse incomplete serverdesc
3534 - Add a new function to "change pseudonyms" -- that is, to stop
3535 using any currently-dirty circuits for new streams, so we don't
3536 link new actions to old actions. Currently it's only called on
3537 HUP (or SIGNAL RELOAD).
3538 - On sighup, if UseHelperNodes changed to 1, use new circuits.
3539 - Start using RAND_bytes rather than RAND_pseudo_bytes from
3540 OpenSSL. Also, reseed our entropy every hour, not just at
3541 startup. And entropy in 512-bit chunks, not 160-bit chunks.
3543 o Fixes on 0.1.1.7-alpha:
3544 - Nobody ever implemented EVENT_ADDRMAP for control protocol
3545 version 0, so don't let version 0 controllers ask for it.
3546 - If you requested something with too many newlines via the
3547 v1 controller protocol, you could crash tor.
3548 - Fix a number of memory leaks, including some pretty serious ones.
3549 - Re-enable DirPort testing again, so Tor servers will be willing
3550 to advertise their DirPort if it's reachable.
3551 - On TLS handshake, only check the other router's nickname against
3552 its expected nickname if is_named is set.
3554 o Fixes forward-ported from 0.1.0.15:
3555 - Don't crash when we don't have any spare file descriptors and we
3556 try to spawn a dns or cpu worker.
3557 - Make the numbers in read-history and write-history into uint64s,
3558 so they don't overflow and publish negatives in the descriptor.
3561 - For the OS X package's modified privoxy config file, comment
3562 out the "logfile" line so we don't log everything passed
3564 - We were whining about using socks4 or socks5-with-local-lookup
3565 even when it's an IP in the "virtual" range we designed exactly
3567 - We were leaking some memory every time the client changes IPs.
3568 - Never call free() on tor_malloc()d memory. This will help us
3569 use dmalloc to detect memory leaks.
3570 - Check for named servers when looking them up by nickname;
3571 warn when we'recalling a non-named server by its nickname;
3572 don't warn twice about the same name.
3573 - Try to list MyFamily elements by key, not by nickname, and warn
3574 if we've not heard of the server.
3575 - Make windows platform detection (uname equivalent) smarter.
3576 - It turns out sparc64 doesn't like unaligned access either.
3579 Changes in version 0.1.0.15 - 2005-09-23
3580 o Bugfixes on 0.1.0.x:
3581 - Reject ports 465 and 587 (spam targets) in default exit policy.
3582 - Don't crash when we don't have any spare file descriptors and we
3583 try to spawn a dns or cpu worker.
3584 - Get rid of IgnoreVersion undocumented config option, and make us
3585 only warn, never exit, when we're running an obsolete version.
3586 - Don't try to print a null string when your server finds itself to
3587 be unreachable and the Address config option is empty.
3588 - Make the numbers in read-history and write-history into uint64s,
3589 so they don't overflow and publish negatives in the descriptor.
3590 - Fix a minor memory leak in smartlist_string_remove().
3591 - We were only allowing ourselves to upload a server descriptor at
3592 most every 20 minutes, even if it changed earlier than that.
3593 - Clean up log entries that pointed to old URLs.
3596 Changes in version 0.1.1.7-alpha - 2005-09-14
3597 o Fixes on 0.1.1.6-alpha:
3598 - Exit servers were crashing when people asked them to make a
3599 connection to an address not in their exit policy.
3600 - Looking up a non-existent stream for a v1 control connection would
3602 - Fix a seg fault if we ask a dirserver for a descriptor by
3603 fingerprint but he doesn't know about him.
3604 - SETCONF was appending items to linelists, not clearing them.
3605 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
3606 out and refuse the setconf if it would fail.
3607 - Downgrade the dirserver log messages when whining about
3611 - Add Peter Palfrader's check-tor script to tor/contrib/
3612 It lets you easily check whether a given server (referenced by
3613 nickname) is reachable by you.
3614 - Numerous changes to move towards client-side v2 directories. Not
3618 - If the user gave tor an odd number of command-line arguments,
3619 we were silently ignoring the last one. Now we complain and fail.
3620 [This wins the oldest-bug prize -- this bug has been present since
3621 November 2002, as released in Tor 0.0.0.]
3622 - Do not use unaligned memory access on alpha, mips, or mipsel.
3623 It *works*, but is very slow, so we treat them as if it doesn't.
3624 - Retry directory requests if we fail to get an answer we like
3625 from a given dirserver (we were retrying before, but only if
3626 we fail to connect).
3627 - When writing the RecommendedVersions line, sort them first.
3628 - When the client asked for a rendezvous port that the hidden
3629 service didn't want to provide, we were sending an IP address
3630 back along with the end cell. Fortunately, it was zero. But stop
3632 - Correct "your server is reachable" log entries to indicate that
3633 it was self-testing that told us so.
3636 Changes in version 0.1.1.6-alpha - 2005-09-09
3637 o Fixes on 0.1.1.5-alpha:
3638 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
3639 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
3640 - Fix bug with tor_memmem finding a match at the end of the string.
3641 - Make unit tests run without segfaulting.
3642 - Resolve some solaris x86 compile warnings.
3643 - Handle duplicate lines in approved-routers files without warning.
3644 - Fix bug where as soon as a server refused any requests due to his
3645 exit policy (e.g. when we ask for localhost and he tells us that's
3646 127.0.0.1 and he won't do it), we decided he wasn't obeying his
3647 exit policy using him for any exits.
3648 - Only do openssl hardware accelerator stuff if openssl version is
3651 o New controller features/fixes:
3652 - Add a "RESETCONF" command so you can set config options like
3653 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
3654 a config option in the torrc with no value, then it clears it
3655 entirely (rather than setting it to its default).
3656 - Add a "GETINFO config-file" to tell us where torrc is.
3657 - Avoid sending blank lines when GETINFO replies should be empty.
3658 - Add a QUIT command for the controller (for using it manually).
3659 - Fix a bug in SAVECONF that was adding default dirservers and
3660 other redundant entries to the torrc file.
3662 o Start on the new directory design:
3663 - Generate, publish, cache, serve new network-status format.
3664 - Publish individual descriptors (by fingerprint, by "all", and by
3666 - Publish client and server recommended versions separately.
3667 - Allow tor_gzip_uncompress() to handle multiple concatenated
3668 compressed strings. Serve compressed groups of router
3669 descriptors. The compression logic here could be more
3671 - Distinguish v1 authorities (all currently trusted directories)
3672 from v2 authorities (all trusted directories).
3673 - Change DirServers config line to note which dirs are v1 authorities.
3674 - Add configuration option "V1AuthoritativeDirectory 1" which
3675 moria1, moria2, and tor26 should set.
3676 - Remove option when getting directory cache to see whether they
3677 support running-routers; they all do now. Replace it with one
3678 to see whether caches support v2 stuff.
3681 - Dirservers now do their own external reachability testing of each
3682 Tor server, and only list them as running if they've been found to
3683 be reachable. We also send back warnings to the server's logs if
3684 it uploads a descriptor that we already believe is unreachable.
3685 - Implement exit enclaves: if we know an IP address for the
3686 destination, and there's a running Tor server at that address
3687 which allows exit to the destination, then extend the circuit to
3688 that exit first. This provides end-to-end encryption and end-to-end
3689 authentication. Also, if the user wants a .exit address or enclave,
3690 use 4 hops rather than 3, and cannibalize a general circ for it
3692 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
3693 controller. Also, rotate dns and cpu workers if the controller
3694 changes options that will affect them; and initialize the dns
3695 worker cache tree whether or not we start out as a server.
3696 - Only upload a new server descriptor when options change, 18
3697 hours have passed, uptime is reset, or bandwidth changes a lot.
3698 - Check [X-]Forwarded-For headers in HTTP requests when generating
3699 log messages. This lets people run dirservers (and caches) behind
3700 Apache but still know which IP addresses are causing warnings.
3702 o Config option changes:
3703 - Replace (Fascist)Firewall* config options with a new
3704 ReachableAddresses option that understands address policies.
3705 For example, "ReachableAddresses *:80,*:443"
3706 - Get rid of IgnoreVersion undocumented config option, and make us
3707 only warn, never exit, when we're running an obsolete version.
3708 - Make MonthlyAccountingStart config option truly obsolete now.
3711 - Reject ports 465 and 587 in the default exit policy, since
3712 people have started using them for spam too.
3713 - It turns out we couldn't bootstrap a network since we added
3714 reachability detection in 0.1.0.1-rc. Good thing the Tor network
3715 has never gone down. Add an AssumeReachable config option to let
3716 servers and dirservers bootstrap. When we're trying to build a
3717 high-uptime or high-bandwidth circuit but there aren't enough
3718 suitable servers, try being less picky rather than simply failing.
3719 - Our logic to decide if the OR we connected to was the right guy
3720 was brittle and maybe open to a mitm for unverified routers.
3721 - We weren't cannibalizing circuits correctly for
3722 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
3723 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
3724 build those from scratch. This should make hidden services faster.
3725 - Predict required circuits better, with an eye toward making hidden
3726 services faster on the service end.
3727 - Retry streams if the exit node sends back a 'misc' failure. This
3728 should result in fewer random failures. Also, after failing
3729 from resolve failed or misc, reset the num failures, so we give
3730 it a fair shake next time we try.
3731 - Clean up the rendezvous warn log msgs, and downgrade some to info.
3732 - Reduce severity on logs about dns worker spawning and culling.
3733 - When we're shutting down and we do something like try to post a
3734 server descriptor or rendezvous descriptor, don't complain that
3735 we seem to be unreachable. Of course we are, we're shutting down.
3736 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
3737 We don't use them yet, but maybe one day our DNS resolver will be
3738 able to discover them.
3739 - Make ContactInfo mandatory for authoritative directory servers.
3740 - Require server descriptors to list IPv4 addresses -- hostnames
3741 are no longer allowed. This also fixes some potential security
3742 problems with people providing hostnames as their address and then
3743 preferentially resolving them to partition users.
3744 - Change log line for unreachability to explicitly suggest /etc/hosts
3745 as the culprit. Also make it clearer what IP address and ports we're
3746 testing for reachability.
3747 - Put quotes around user-supplied strings when logging so users are
3748 more likely to realize if they add bad characters (like quotes)
3750 - Let auth dir servers start without specifying an Address config
3752 - Make unit tests (and other invocations that aren't the real Tor)
3753 run without launching listeners, creating subdirectories, and so on.
3756 Changes in version 0.1.1.5-alpha - 2005-08-08
3757 o Bugfixes included in 0.1.0.14.
3759 o Bugfixes on 0.1.0.x:
3760 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
3761 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
3762 it would silently using ignore the 6668.
3765 Changes in version 0.1.0.14 - 2005-08-08
3766 o Bugfixes on 0.1.0.x:
3767 - Fix the other half of the bug with crypto handshakes
3769 - Fix an assert trigger if you send a 'signal term' via the
3770 controller when it's listening for 'event info' messages.
3773 Changes in version 0.1.1.4-alpha - 2005-08-04
3774 o Bugfixes included in 0.1.0.13.
3777 - Improve tor_gettimeofday() granularity on windows.
3778 - Make clients regenerate their keys when their IP address changes.
3779 - Implement some more GETINFO goodness: expose helper nodes, config
3780 options, getinfo keys.
3783 Changes in version 0.1.0.13 - 2005-08-04
3784 o Bugfixes on 0.1.0.x:
3785 - Fix a critical bug in the security of our crypto handshakes.
3786 - Fix a size_t underflow in smartlist_join_strings2() that made
3787 it do bad things when you hand it an empty smartlist.
3788 - Fix Windows installer to ship Tor license (thanks to Aphex for
3789 pointing out this oversight) and put a link to the doc directory
3791 - Explicitly set no-unaligned-access for sparc: it turns out the
3792 new gcc's let you compile broken code, but that doesn't make it
3796 Changes in version 0.1.1.3-alpha - 2005-07-23
3797 o Bugfixes on 0.1.1.2-alpha:
3798 - Fix a bug in handling the controller's "post descriptor"
3800 - Fix several bugs in handling the controller's "extend circuit"
3802 - Fix a bug in handling the controller's "stream status" event.
3803 - Fix an assert failure if we have a controller listening for
3804 circuit events and we go offline.
3805 - Re-allow hidden service descriptors to publish 0 intro points.
3806 - Fix a crash when generating your hidden service descriptor if
3807 you don't have enough intro points already.
3809 o New features on 0.1.1.2-alpha:
3810 - New controller function "getinfo accounting", to ask how
3811 many bytes we've used in this time period.
3812 - Experimental support for helper nodes: a lot of the risk from
3813 a small static adversary comes because users pick new random
3814 nodes every time they rebuild a circuit. Now users will try to
3815 stick to the same small set of entry nodes if they can. Not
3816 enabled by default yet.
3818 o Bugfixes on 0.1.0.12:
3819 - If you're an auth dir server, always publish your dirport,
3820 even if you haven't yet found yourself to be reachable.
3821 - Fix a size_t underflow in smartlist_join_strings2() that made
3822 it do bad things when you hand it an empty smartlist.
3825 Changes in version 0.1.0.12 - 2005-07-18
3826 o New directory servers:
3827 - tor26 has changed IP address.
3829 o Bugfixes on 0.1.0.x:
3830 - Fix a possible double-free in tor_gzip_uncompress().
3831 - When --disable-threads is set, do not search for or link against
3833 - Don't trigger an assert if an authoritative directory server
3834 claims its dirport is 0.
3835 - Fix bug with removing Tor as an NT service: some people were
3836 getting "The service did not return an error." Thanks to Matt
3840 Changes in version 0.1.1.2-alpha - 2005-07-15
3841 o New directory servers:
3842 - tor26 has changed IP address.
3844 o Bugfixes on 0.1.0.x, crashes/leaks:
3845 - Port the servers-not-obeying-their-exit-policies fix from
3847 - Fix an fd leak in start_daemon().
3848 - On Windows, you can't always reopen a port right after you've
3849 closed it. So change retry_listeners() to only close and re-open
3850 ports that have changed.
3851 - Fix a possible double-free in tor_gzip_uncompress().
3853 o Bugfixes on 0.1.0.x, usability:
3854 - When tor_socketpair() fails in Windows, give a reasonable
3855 Windows-style errno back.
3856 - Let people type "tor --install" as well as "tor -install" when
3858 want to make it an NT service.
3859 - NT service patch from Matt Edman to improve error messages.
3860 - When the controller asks for a config option with an abbreviated
3861 name, give the full name in our response.
3862 - Correct the man page entry on TrackHostExitsExpire.
3863 - Looks like we were never delivering deflated (i.e. compressed)
3864 running-routers lists, even when asked. Oops.
3865 - When --disable-threads is set, do not search for or link against
3868 o Bugfixes on 0.1.1.x:
3869 - Fix a seg fault with autodetecting which controller version is
3873 - New hidden service descriptor format: put a version in it, and
3874 let people specify introduction/rendezvous points that aren't
3875 in "the directory" (which is subjective anyway).
3876 - Allow the DEBUG controller event to work again. Mark certain log
3877 entries as "don't tell this to controllers", so we avoid cycles.
3880 Changes in version 0.1.0.11 - 2005-06-30
3881 o Bugfixes on 0.1.0.x:
3882 - Fix major security bug: servers were disregarding their
3883 exit policies if clients behaved unexpectedly.
3884 - Make OS X init script check for missing argument, so we don't
3885 confuse users who invoke it incorrectly.
3886 - Fix a seg fault in "tor --hash-password foo".
3887 - The MAPADDRESS control command was broken.
3890 Changes in version 0.1.1.1-alpha - 2005-06-29
3892 - Make OS X init script check for missing argument, so we don't
3893 confuse users who invoke it incorrectly.
3894 - Fix a seg fault in "tor --hash-password foo".
3895 - Fix a possible way to DoS dirservers.
3896 - When we complain that your exit policy implicitly allows local or
3897 private address spaces, name them explicitly so operators can
3899 - Make the log message less scary when all the dirservers are
3900 temporarily unreachable.
3901 - We were printing the number of idle dns workers incorrectly when
3905 - Revised controller protocol (version 1) that uses ascii rather
3906 than binary. Add supporting libraries in python and java so you
3907 can use the controller from your applications without caring how
3909 - Spiffy new support for crypto hardware accelerators. Can somebody
3913 Changes in version 0.0.9.10 - 2005-06-16
3914 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
3915 - Refuse relay cells that claim to have a length larger than the
3916 maximum allowed. This prevents a potential attack that could read
3917 arbitrary memory (e.g. keys) from an exit server's process
3921 Changes in version 0.1.0.10 - 2005-06-14
3922 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
3923 libevent before 1.1a.
3926 Changes in version 0.1.0.9-rc - 2005-06-09
3928 - Reset buf->highwater every time buf_shrink() is called, not just on
3929 a successful shrink. This was causing significant memory bloat.
3930 - Fix buffer overflow when checking hashed passwords.
3931 - Security fix: if seeding the RNG on Win32 fails, quit.
3932 - Allow seeding the RNG on Win32 even when you're not running as
3934 - Disable threading on Solaris too. Something is wonky with it,
3935 cpuworkers, and reentrant libs.
3936 - Reenable the part of the code that tries to flush as soon as an
3937 OR outbuf has a full TLS record available. Perhaps this will make
3938 OR outbufs not grow as huge except in rare cases, thus saving lots
3939 of CPU time plus memory.
3940 - Reject malformed .onion addresses rather then passing them on as
3941 normal web requests.
3942 - Adapt patch from Adam Langley: fix possible memory leak in
3943 tor_lookup_hostname().
3944 - Initialize libevent later in the startup process, so the logs are
3945 already established by the time we start logging libevent warns.
3946 - Use correct errno on win32 if libevent fails.
3947 - Check and warn about known-bad/slow libevent versions.
3948 - Pay more attention to the ClientOnly config option.
3949 - Have torctl.in/tor.sh.in check for location of su binary (needed
3951 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
3952 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
3953 HttpProxyAuthenticator
3954 - Stop warning about sigpipes in the logs. We're going to
3955 pretend that getting these occassionally is normal and fine.
3956 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
3958 installer screens; and don't put stuff into StartupItems unless
3959 the user asks you to.
3960 - Require servers that use the default dirservers to have public IP
3961 addresses. We have too many servers that are configured with private
3962 IPs and their admins never notice the log entries complaining that
3963 their descriptors are being rejected.
3964 - Add OSX uninstall instructions. An actual uninstall script will
3968 Changes in version 0.1.0.8-rc - 2005-05-23
3970 - It turns out that kqueue on OS X 10.3.9 was causing kernel
3971 panics. Disable kqueue on all OS X Tors.
3972 - Fix RPM: remove duplicate line accidentally added to the rpm
3974 - Disable threads on openbsd too, since its gethostaddr is not
3976 - Tolerate libevent 0.8 since it still works, even though it's
3978 - Enable building on Red Hat 9.0 again.
3979 - Allow the middle hop of the testing circuit to be running any
3980 version, now that most of them have the bugfix to let them connect
3981 to unknown servers. This will allow reachability testing to work
3982 even when 0.0.9.7-0.0.9.9 become obsolete.
3983 - Handle relay cells with rh.length too large. This prevents
3984 a potential attack that could read arbitrary memory (maybe even
3985 keys) from the exit server's process.
3986 - We screwed up the dirport reachability testing when we don't yet
3987 have a cached version of the directory. Hopefully now fixed.
3988 - Clean up router_load_single_router() (used by the controller),
3989 so it doesn't seg fault on error.
3990 - Fix a minor memory leak when somebody establishes an introduction
3991 point at your Tor server.
3992 - If a socks connection ends because read fails, don't warn that
3993 you're not sending a socks reply back.
3996 - Add HttpProxyAuthenticator config option too, that works like
3997 the HttpsProxyAuthenticator config option.
3998 - Encode hashed controller passwords in hex instead of base64,
3999 to make it easier to write controllers.
4002 Changes in version 0.1.0.7-rc - 2005-05-17
4004 - Fix a bug in the OS X package installer that prevented it from
4005 installing on Tiger.
4006 - Fix a script bug in the OS X package installer that made it
4007 complain during installation.
4008 - Find libevent even if it's hiding in /usr/local/ and your
4009 CFLAGS and LDFLAGS don't tell you to look there.
4010 - Be able to link with libevent as a shared library (the default
4011 after 1.0d), even if it's hiding in /usr/local/lib and even
4012 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
4013 assuming you're running gcc. Otherwise fail and give a useful
4015 - Fix a bug in the RPM packager: set home directory for _tor to
4016 something more reasonable when first installing.
4017 - Free a minor amount of memory that is still reachable on exit.
4020 Changes in version 0.1.0.6-rc - 2005-05-14
4022 - Implement --disable-threads configure option. Disable threads on
4023 netbsd by default, because it appears to have no reentrant resolver
4025 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
4026 release (1.1) detects and disables kqueue if it's broken.
4027 - Append default exit policy before checking for implicit internal
4028 addresses. Now we don't log a bunch of complaints on startup
4029 when using the default exit policy.
4030 - Some people were putting "Address " in their torrc, and they had
4031 a buggy resolver that resolved " " to 0.0.0.0. Oops.
4032 - If DataDir is ~/.tor, and that expands to /.tor, then default to
4033 LOCALSTATEDIR/tor instead.
4034 - Fix fragmented-message bug in TorControl.py.
4035 - Resolve a minor bug which would prevent unreachable dirports
4036 from getting suppressed in the published descriptor.
4037 - When the controller gave us a new descriptor, we weren't resolving
4038 it immediately, so Tor would think its address was 0.0.0.0 until
4039 we fetched a new directory.
4040 - Fix an uppercase/lowercase case error in suppressing a bogus
4041 libevent warning on some Linuxes.
4044 - Begin scrubbing sensitive strings from logs by default. Turn off
4045 the config option SafeLogging if you need to do debugging.
4046 - Switch to a new buffer management algorithm, which tries to avoid
4047 reallocing and copying quite as much. In first tests it looks like
4048 it uses *more* memory on average, but less cpu.
4049 - First cut at support for "create-fast" cells. Clients can use
4050 these when extending to their first hop, since the TLS already
4051 provides forward secrecy and authentication. Not enabled on
4053 - When dirservers refuse a router descriptor, we now log its
4054 contactinfo, platform, and the poster's IP address.
4055 - Call tor_free_all instead of connections_free_all after forking, to
4056 save memory on systems that need to fork.
4057 - Whine at you if you're a server and you don't set your contactinfo.
4058 - Implement --verify-config command-line option to check if your torrc
4059 is valid without actually launching Tor.
4060 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
4061 rather than just rejecting it.
4064 Changes in version 0.1.0.5-rc - 2005-04-27
4066 - Stop trying to print a null pointer if an OR conn fails because
4067 we didn't like its cert.
4069 - Switch our internal buffers implementation to use a ring buffer,
4070 to hopefully improve performance for fast servers a lot.
4071 - Add HttpsProxyAuthenticator support (basic auth only), based
4072 on patch from Adam Langley.
4073 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
4074 the fast servers that have been joining lately.
4075 - Give hidden service accesses extra time on the first attempt,
4076 since 60 seconds is often only barely enough. This might improve
4078 - Improve performance for dirservers: stop re-parsing the whole
4079 directory every time you regenerate it.
4080 - Add more debugging info to help us find the weird dns freebsd
4081 pthreads bug; cleaner debug messages to help track future issues.
4084 Changes in version 0.0.9.9 - 2005-04-23
4085 o Bugfixes on 0.0.9.x:
4086 - If unofficial Tor clients connect and send weird TLS certs, our
4087 Tor server triggers an assert. This release contains a minimal
4088 backport from the broader fix that we put into 0.1.0.4-rc.
4091 Changes in version 0.1.0.4-rc - 2005-04-23
4093 - If unofficial Tor clients connect and send weird TLS certs, our
4094 Tor server triggers an assert. Stop asserting, and start handling
4095 TLS errors better in other situations too.
4096 - When the controller asks us to tell it about all the debug-level
4097 logs, it turns out we were generating debug-level logs while
4098 telling it about them, which turns into a bad loop. Now keep
4099 track of whether you're sending a debug log to the controller,
4100 and don't log when you are.
4101 - Fix the "postdescriptor" feature of the controller interface: on
4102 non-complete success, only say "done" once.
4104 - Clients are now willing to load balance over up to 2mB, not 1mB,
4105 of advertised bandwidth capacity.
4106 - Add a NoPublish config option, so you can be a server (e.g. for
4107 testing running Tor servers in other Tor networks) without
4108 publishing your descriptor to the primary dirservers.
4111 Changes in version 0.1.0.3-rc - 2005-04-08
4112 o Improvements on 0.1.0.2-rc:
4113 - Client now retries when streams end early for 'hibernating' or
4114 'resource limit' reasons, rather than failing them.
4115 - More automated handling for dirserver operators:
4116 - Automatically approve nodes running 0.1.0.2-rc or later,
4117 now that the the reachability detection stuff is working.
4118 - Now we allow two unverified servers with the same nickname
4119 but different keys. But if a nickname is verified, only that
4120 nickname+key are allowed.
4121 - If you're an authdirserver connecting to an address:port,
4122 and it's not the OR you were expecting, forget about that
4123 descriptor. If he *was* the one you were expecting, then forget
4124 about all other descriptors for that address:port.
4125 - Allow servers to publish descriptors from 12 hours in the future.
4126 Corollary: only whine about clock skew from the dirserver if
4127 he's a trusted dirserver (since now even verified servers could
4128 have quite wrong clocks).
4129 - Adjust maximum skew and age for rendezvous descriptors: let skew
4130 be 48 hours rather than 90 minutes.
4131 - Efficiency improvements:
4132 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
4133 it much faster to look up a circuit for each relay cell.
4134 - Remove most calls to assert_all_pending_dns_resolves_ok(),
4135 since they're eating our cpu on exit nodes.
4136 - Stop wasting time doing a case insensitive comparison for every
4137 dns name every time we do any lookup. Canonicalize the names to
4138 lowercase and be done with it.
4139 - Start sending 'truncated' cells back rather than destroy cells,
4140 if the circuit closes in front of you. This means we won't have
4141 to abandon partially built circuits.
4142 - Only warn once per nickname from add_nickname_list_to_smartlist
4143 per failure, so an entrynode or exitnode choice that's down won't
4145 - Put a note in the torrc about abuse potential with the default
4147 - Revise control spec and implementation to allow all log messages to
4148 be sent to controller with their severities intact (suggested by
4149 Matt Edman). Update TorControl to handle new log event types.
4150 - Provide better explanation messages when controller's POSTDESCRIPTOR
4152 - Stop putting nodename in the Platform string in server descriptors.
4153 It doesn't actually help, and it is confusing/upsetting some people.
4155 o Bugfixes on 0.1.0.2-rc:
4156 - We were printing the host mask wrong in exit policies in server
4157 descriptors. This isn't a critical bug though, since we were still
4158 obeying the exit policy internally.
4159 - Fix Tor when compiled with libevent but without pthreads: move
4160 connection_unregister() from _connection_free() to
4162 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
4163 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
4164 when we look through the connection array, we'll find any of the
4165 cpu/dnsworkers. This is no good.
4167 o Bugfixes on 0.0.9.8:
4168 - Fix possible bug on threading platforms (e.g. win32) which was
4169 leaking a file descriptor whenever a cpuworker or dnsworker died.
4170 - When using preferred entry or exit nodes, ignore whether the
4171 circuit wants uptime or capacity. They asked for the nodes, they
4173 - chdir() to your datadirectory at the *end* of the daemonize process,
4174 not the beginning. This was a problem because the first time you
4175 run tor, if your datadir isn't there, and you have runasdaemon set
4176 to 1, it will try to chdir to it before it tries to create it. Oops.
4177 - Handle changed router status correctly when dirserver reloads
4178 fingerprint file. We used to be dropping all unverified descriptors
4179 right then. The bug was hidden because we would immediately
4180 fetch a directory from another dirserver, which would include the
4181 descriptors we just dropped.
4182 - When we're connecting to an OR and he's got a different nickname/key
4183 than we were expecting, only complain loudly if we're an OP or a
4184 dirserver. Complaining loudly to the OR admins just confuses them.
4185 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
4186 artificially capped at 500kB.
4189 Changes in version 0.0.9.8 - 2005-04-07
4190 o Bugfixes on 0.0.9.x:
4191 - We have a bug that I haven't found yet. Sometimes, very rarely,
4192 cpuworkers get stuck in the 'busy' state, even though the cpuworker
4193 thinks of itself as idle. This meant that no new circuits ever got
4194 established. Here's a workaround to kill any cpuworker that's been
4195 busy for more than 100 seconds.
4198 Changes in version 0.1.0.2-rc - 2005-04-01
4199 o Bugfixes on 0.1.0.1-rc:
4200 - Fixes on reachability detection:
4201 - Don't check for reachability while hibernating.
4202 - If ORPort is reachable but DirPort isn't, still publish the
4203 descriptor, but zero out DirPort until it's found reachable.
4204 - When building testing circs for ORPort testing, use only
4205 high-bandwidth nodes, so fewer circuits fail.
4206 - Complain about unreachable ORPort separately from unreachable
4207 DirPort, so the user knows what's going on.
4208 - Make sure we only conclude ORPort reachability if we didn't
4209 initiate the conn. Otherwise we could falsely conclude that
4210 we're reachable just because we connected to the guy earlier
4211 and he used that same pipe to extend to us.
4212 - Authdirservers shouldn't do ORPort reachability detection,
4213 since they're in clique mode, so it will be rare to find a
4214 server not already connected to them.
4215 - When building testing circuits, always pick middle hops running
4216 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
4217 bug. (This is a kludge; it will go away when 0.0.9.x becomes
4219 - When we decide we're reachable, actually publish our descriptor
4221 - Fix bug in redirectstream in the controller.
4222 - Fix the state descriptor strings so logs don't claim edge streams
4223 are in a different state than they actually are.
4224 - Use recent libevent features when possible (this only really affects
4225 win32 and osx right now, because the new libevent with these
4226 features hasn't been released yet). Add code to suppress spurious
4228 - Prevent possible segfault in connection_close_unattached_ap().
4229 - Fix newlines on torrc in win32.
4230 - Improve error msgs when tor-resolve fails.
4232 o Improvements on 0.0.9.x:
4233 - New experimental script tor/contrib/ExerciseServer.py (needs more
4234 work) that uses the controller interface to build circuits and
4235 fetch pages over them. This will help us bootstrap servers that
4236 have lots of capacity but haven't noticed it yet.
4237 - New experimental script tor/contrib/PathDemo.py (needs more work)
4238 that uses the controller interface to let you choose whole paths
4240 "<hostname>.<path,separated by dots>.<length of path>.path"
4241 - When we've connected to an OR and handshaked but didn't like
4242 the result, we were closing the conn without sending destroy
4243 cells back for pending circuits. Now send those destroys.
4246 Changes in version 0.0.9.7 - 2005-04-01
4247 o Bugfixes on 0.0.9.x:
4248 - Fix another race crash bug (thanks to Glenn Fink for reporting).
4249 - Compare identity to identity, not to nickname, when extending to
4250 a router not already in the directory. This was preventing us from
4251 extending to unknown routers. Oops.
4252 - Make sure to create OS X Tor user in <500 range, so we aren't
4253 creating actual system users.
4254 - Note where connection-that-hasn't-sent-end was marked, and fix
4255 a few really loud instances of this harmless bug (it's fixed more
4259 Changes in version 0.1.0.1-rc - 2005-03-28
4261 - Add reachability testing. Your Tor server will automatically try
4262 to see if its ORPort and DirPort are reachable from the outside,
4263 and it won't upload its descriptor until it decides they are.
4264 - Handle unavailable hidden services better. Handle slow or busy
4265 hidden services better.
4266 - Add support for CONNECTing through https proxies, with "HttpsProxy"
4268 - New exit policy: accept most low-numbered ports, rather than
4269 rejecting most low-numbered ports.
4270 - More Tor controller support (still experimental). See
4271 http://tor.eff.org/doc/control-spec.txt for all the new features,
4272 including signals to emulate unix signals from any platform;
4273 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
4274 closestream; closecircuit; etc.
4275 - Make nt services work and start on startup on win32 (based on
4276 patch by Matt Edman).
4277 - Add a new AddressMap config directive to rewrite incoming socks
4278 addresses. This lets you, for example, declare an implicit
4279 required exit node for certain sites.
4280 - Add a new TrackHostExits config directive to trigger addressmaps
4281 for certain incoming socks addresses -- for sites that break when
4282 your exit keeps changing (based on patch by Mike Perry).
4283 - Redo the client-side dns cache so it's just an addressmap too.
4284 - Notice when our IP changes, and reset stats/uptime/reachability.
4285 - When an application is using socks5, give him the whole variety of
4286 potential socks5 responses (connect refused, host unreachable, etc),
4287 rather than just "success" or "failure".
4288 - A more sane version numbering system. See
4289 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
4290 - New contributed script "exitlist": a simple python script to
4291 parse directories and find Tor nodes that exit to listed
4293 - New contributed script "privoxy-tor-toggle" to toggle whether
4294 Privoxy uses Tor. Seems to be configured for Debian by default.
4295 - Report HTTP reasons to client when getting a response from directory
4296 servers -- so you can actually know what went wrong.
4297 - New config option MaxAdvertisedBandwidth which lets you advertise
4298 a low bandwidthrate (to not attract as many circuits) while still
4299 allowing a higher bandwidthrate in reality.
4301 o Robustness/stability fixes:
4302 - Make Tor use Niels Provos's libevent instead of its current
4303 poll-but-sometimes-select mess. This will let us use faster async
4304 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
4306 - pthread support now too. This was forced because when we forked,
4307 we ended up wasting a lot of duplicate ram over time. Also switch
4308 to foo_r versions of some library calls to allow reentry and
4310 - Better handling for heterogeneous / unreliable nodes:
4311 - Annotate circuits w/ whether they aim to contain high uptime nodes
4312 and/or high capacity nodes. When building circuits, choose
4314 - This means that every single node in an intro rend circuit,
4315 not just the last one, will have a minimum uptime.
4316 - New config option LongLivedPorts to indicate application streams
4317 that will want high uptime circuits.
4318 - Servers reset uptime when a dir fetch entirely fails. This
4319 hopefully reflects stability of the server's network connectivity.
4320 - If somebody starts his tor server in Jan 2004 and then fixes his
4321 clock, don't make his published uptime be a year.
4322 - Reset published uptime when you wake up from hibernation.
4323 - Introduce a notion of 'internal' circs, which are chosen without
4324 regard to the exit policy of the last hop. Intro and rendezvous
4325 circs must be internal circs, to avoid leaking information. Resolve
4326 and connect streams can use internal circs if they want.
4327 - New circuit pooling algorithm: make sure to have enough circs around
4328 to satisfy any predicted ports, and also make sure to have 2 internal
4329 circs around if we've required internal circs lately (and with high
4330 uptime if we've seen that lately too).
4331 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
4332 which describes how often we retry making new circuits if current
4333 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
4334 how long we're willing to make use of an already-dirty circuit.
4335 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
4336 circ as necessary, if there are any completed ones lying around
4337 when we try to launch one.
4338 - Make hidden services try to establish a rendezvous for 30 seconds,
4339 rather than for n (where n=3) attempts to build a circuit.
4340 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
4341 "ShutdownWaitLength".
4342 - Try to be more zealous about calling connection_edge_end when
4343 things go bad with edge conns in connection.c.
4344 - Revise tor-spec to add more/better stream end reasons.
4345 - Revise all calls to connection_edge_end to avoid sending "misc",
4346 and to take errno into account where possible.
4349 - Fix a race condition that can trigger an assert, when we have a
4350 pending create cell and an OR connection fails right then.
4351 - Fix several double-mark-for-close bugs, e.g. where we were finding
4352 a conn for a cell even if that conn is already marked for close.
4353 - Make sequence of log messages when starting on win32 with no config
4354 file more reasonable.
4355 - When choosing an exit node for a new non-internal circ, don't take
4356 into account whether it'll be useful for any pending x.onion
4357 addresses -- it won't.
4358 - Turn addr_policy_compare from a tristate to a quadstate; this should
4359 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
4360 for google.com" problem.
4361 - Make "platform" string in descriptor more accurate for Win32 servers,
4362 so it's not just "unknown platform".
4363 - Fix an edge case in parsing config options (thanks weasel).
4364 If they say "--" on the commandline, it's not an option.
4365 - Reject odd-looking addresses at the client (e.g. addresses that
4366 contain a colon), rather than having the server drop them because
4368 - tor-resolve requests were ignoring .exit if there was a working circuit
4369 they could use instead.
4370 - REUSEADDR on normal platforms means you can rebind to the port
4371 right after somebody else has let it go. But REUSEADDR on win32
4372 means to let you bind to the port _even when somebody else
4373 already has it bound_! So, don't do that on Win32.
4374 - Change version parsing logic: a version is "obsolete" if it is not
4375 recommended and (1) there is a newer recommended version in the
4376 same series, or (2) there are no recommended versions in the same
4377 series, but there are some recommended versions in a newer series.
4378 A version is "new" if it is newer than any recommended version in
4380 - Stop most cases of hanging up on a socks connection without sending
4384 - Require BandwidthRate to be at least 20kB/s for servers.
4385 - When a dirserver causes you to give a warn, mention which dirserver
4387 - New config option DirAllowPrivateAddresses for authdirservers.
4388 Now by default they refuse router descriptors that have non-IP or
4389 private-IP addresses.
4390 - Stop publishing socksport in the directory, since it's not
4391 actually meant to be public. For compatibility, publish a 0 there
4393 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
4394 smart" value, that is low for servers and high for clients.
4395 - If our clock jumps forward by 100 seconds or more, assume something
4396 has gone wrong with our network and abandon all not-yet-used circs.
4397 - Warn when exit policy implicitly allows local addresses.
4398 - If we get an incredibly skewed timestamp from a dirserver mirror
4399 that isn't a verified OR, don't warn -- it's probably him that's
4401 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
4402 cookies to disk and doesn't log each web request to disk. (Thanks
4403 to Brett Carrington for pointing this out.)
4404 - When a client asks us for a dir mirror and we don't have one,
4405 launch an attempt to get a fresh one.
4406 - If we're hibernating and we get a SIGINT, exit immediately.
4407 - Add --with-dmalloc ./configure option, to track memory leaks.
4408 - And try to free all memory on closing, so we can detect what
4410 - Cache local dns resolves correctly even when they're .exit
4412 - Give a better warning when some other server advertises an
4413 ORPort that is actually an apache running ssl.
4414 - Add "opt hibernating 1" to server descriptor to make it clearer
4415 whether the server is hibernating.
4418 Changes in version 0.0.9.6 - 2005-03-24
4419 o Bugfixes on 0.0.9.x (crashes and asserts):
4420 - Add new end stream reasons to maintainance branch. Fix bug where
4421 reason (8) could trigger an assert. Prevent bug from recurring.
4422 - Apparently win32 stat wants paths to not end with a slash.
4423 - Fix assert triggers in assert_cpath_layer_ok(), where we were
4424 blowing away the circuit that conn->cpath_layer points to, then
4425 checking to see if the circ is well-formed. Backport check to make
4426 sure we dont use the cpath on a closed connection.
4427 - Prevent circuit_resume_edge_reading_helper() from trying to package
4428 inbufs for marked-for-close streams.
4429 - Don't crash on hup if your options->address has become unresolvable.
4430 - Some systems (like OS X) sometimes accept() a connection and tell
4431 you the remote host is 0.0.0.0:0. If this happens, due to some
4432 other mis-features, we get confused; so refuse the conn for now.
4434 o Bugfixes on 0.0.9.x (other):
4435 - Fix harmless but scary "Unrecognized content encoding" warn message.
4436 - Add new stream error reason: TORPROTOCOL reason means "you are not
4437 speaking a version of Tor I understand; say bye-bye to your stream."
4438 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
4439 into the future, now that we are more tolerant of skew. This
4440 resolves a bug where a Tor server would refuse to cache a directory
4441 because all the directories it gets are too far in the future;
4442 yet the Tor server never logs any complaints about clock skew.
4443 - Mac packaging magic: make man pages useable, and do not overwrite
4444 existing torrc files.
4445 - Make OS X log happily to /var/log/tor/tor.log
4448 Changes in version 0.0.9.5 - 2005-02-22
4449 o Bugfixes on 0.0.9.x:
4450 - Fix an assert race at exit nodes when resolve requests fail.
4451 - Stop picking unverified dir mirrors--it only leads to misery.
4452 - Patch from Matt Edman to make NT services work better. Service
4453 support is still not compiled into the executable by default.
4454 - Patch from Dmitri Bely so the Tor service runs better under
4455 the win32 SYSTEM account.
4456 - Make tor-resolve actually work (?) on Win32.
4457 - Fix a sign bug when getrlimit claims to have 4+ billion
4458 file descriptors available.
4459 - Stop refusing to start when bandwidthburst == bandwidthrate.
4460 - When create cells have been on the onion queue more than five
4461 seconds, just send back a destroy and take them off the list.
4464 Changes in version 0.0.9.4 - 2005-02-03
4465 o Bugfixes on 0.0.9:
4466 - Fix an assert bug that took down most of our servers: when
4467 a server claims to have 1 GB of bandwidthburst, don't
4469 - Don't crash as badly if we have spawned the max allowed number
4470 of dnsworkers, or we're out of file descriptors.
4471 - Block more file-sharing ports in the default exit policy.
4472 - MaxConn is now automatically set to the hard limit of max
4473 file descriptors we're allowed (ulimit -n), minus a few for
4475 - Give a clearer message when servers need to raise their
4476 ulimit -n when they start running out of file descriptors.
4477 - SGI Compatibility patches from Jan Schaumann.
4478 - Tolerate a corrupt cached directory better.
4479 - When a dirserver hasn't approved your server, list which one.
4480 - Go into soft hibernation after 95% of the bandwidth is used,
4481 not 99%. This is especially important for daily hibernators who
4482 have a small accounting max. Hopefully it will result in fewer
4483 cut connections when the hard hibernation starts.
4484 - Load-balance better when using servers that claim more than
4485 800kB/s of capacity.
4486 - Make NT services work (experimental, only used if compiled in).
4489 Changes in version 0.0.9.3 - 2005-01-21
4490 o Bugfixes on 0.0.9:
4491 - Backport the cpu use fixes from main branch, so busy servers won't
4492 need as much processor time.
4493 - Work better when we go offline and then come back, or when we
4494 run Tor at boot before the network is up. We do this by
4495 optimistically trying to fetch a new directory whenever an
4496 application request comes in and we think we're offline -- the
4497 human is hopefully a good measure of when the network is back.
4498 - Backport some minimal hidserv bugfixes: keep rend circuits open as
4499 long as you keep using them; actually publish hidserv descriptors
4500 shortly after they change, rather than waiting 20-40 minutes.
4501 - Enable Mac startup script by default.
4502 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
4503 - When you update AllowUnverifiedNodes or FirewallPorts via the
4504 controller's setconf feature, we were always appending, never
4506 - When you update HiddenServiceDir via setconf, it was screwing up
4507 the order of reading the lines, making it fail.
4508 - Do not rewrite a cached directory back to the cache; otherwise we
4509 will think it is recent and not fetch a newer one on startup.
4510 - Workaround for webservers that lie about Content-Encoding: Tor
4511 now tries to autodetect compressed directories and compression
4512 itself. This lets us Proxypass dir fetches through apache.
4515 Changes in version 0.0.9.2 - 2005-01-04
4516 o Bugfixes on 0.0.9 (crashes and asserts):
4517 - Fix an assert on startup when the disk is full and you're logging
4519 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
4520 style address, then we'd crash.
4521 - Fix an assert trigger when the running-routers string we get from
4522 a dirserver is broken.
4523 - Make worker threads start and run on win32. Now win32 servers
4525 - Bandaid (not actually fix, but now it doesn't crash) an assert
4526 where the dns worker dies mysteriously and the main Tor process
4527 doesn't remember anything about the address it was resolving.
4529 o Bugfixes on 0.0.9 (Win32):
4530 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
4531 name out of the warning/assert messages.
4532 - Fix a superficial "unhandled error on read" bug on win32.
4533 - The win32 installer no longer requires a click-through for our
4534 license, since our Free Software license grants rights but does not
4536 - Win32: When connecting to a dirserver fails, try another one
4537 immediately. (This was already working for non-win32 Tors.)
4538 - Stop trying to parse $HOME on win32 when hunting for default
4540 - Make tor-resolve.c work on win32 by calling network_init().
4542 o Bugfixes on 0.0.9 (other):
4543 - Make 0.0.9.x build on Solaris again.
4544 - Due to a fencepost error, we were blowing away the \n when reporting
4545 confvalue items in the controller. So asking for multiple config
4546 values at once couldn't work.
4547 - When listing circuits that are pending on an opening OR connection,
4548 if we're an OR we were listing circuits that *end* at us as
4549 being pending on every listener, dns/cpu worker, etc. Stop that.
4550 - Dirservers were failing to create 'running-routers' or 'directory'
4551 strings if we had more than some threshold of routers. Fix them so
4552 they can handle any number of routers.
4553 - Fix a superficial "Duplicate mark for close" bug.
4554 - Stop checking for clock skew for OR connections, even for servers.
4555 - Fix a fencepost error that was chopping off the last letter of any
4556 nickname that is the maximum allowed nickname length.
4557 - Update URLs in log messages so they point to the new website.
4558 - Fix a potential problem in mangling server private keys while
4559 writing to disk (not triggered yet, as far as we know).
4560 - Include the licenses for other free software we include in Tor,
4561 now that we're shipping binary distributions more regularly.
4564 Changes in version 0.0.9.1 - 2004-12-15
4565 o Bugfixes on 0.0.9:
4566 - Make hibernation actually work.
4567 - Make HashedControlPassword config option work.
4568 - When we're reporting event circuit status to a controller,
4569 don't use the stream status code.
4572 Changes in version 0.0.9 - 2004-12-12
4574 - Clean up manpage and torrc.sample file.
4575 - Clean up severities and text of log warnings.
4577 - Make servers trigger an assert when they enter hibernation.
4580 Changes in version 0.0.9rc7 - 2004-12-08
4581 o Bugfixes on 0.0.9rc:
4582 - Fix a stack-trashing crash when an exit node begins hibernating.
4583 - Avoid looking at unallocated memory while considering which
4584 ports we need to build circuits to cover.
4585 - Stop a sigpipe: when an 'end' cell races with eof from the app,
4586 we shouldn't hold-open-until-flush if the eof arrived first.
4587 - Fix a bug with init_cookie_authentication() in the controller.
4588 - When recommending new-format log lines, if the upper bound is
4589 LOG_ERR, leave it implicit.
4591 o Bugfixes on 0.0.8.1:
4592 - Fix a whole slew of memory leaks.
4593 - Fix isspace() and friends so they still make Solaris happy
4594 but also so they don't trigger asserts on win32.
4595 - Fix parse_iso_time on platforms without strptime (eg win32).
4596 - win32: tolerate extra "readable" events better.
4597 - win32: when being multithreaded, leave parent fdarray open.
4598 - Make unit tests work on win32.
4601 Changes in version 0.0.9rc6 - 2004-12-06
4602 o Bugfixes on 0.0.9pre:
4603 - Clean up some more integer underflow opportunities (not exploitable
4605 - While hibernating, hup should not regrow our listeners.
4606 - Send an end to the streams we close when we hibernate, rather
4607 than just chopping them off.
4608 - React to eof immediately on non-open edge connections.
4610 o Bugfixes on 0.0.8.1:
4611 - Calculate timeout for waiting for a connected cell from the time
4612 we sent the begin cell, not from the time the stream started. If
4613 it took a long time to establish the circuit, we would time out
4614 right after sending the begin cell.
4615 - Fix router_compare_addr_to_addr_policy: it was not treating a port
4616 of * as always matching, so we were picking reject *:* nodes as
4617 exit nodes too. Oops.
4620 - New circuit building strategy: keep a list of ports that we've
4621 used in the past 6 hours, and always try to have 2 circuits open
4622 or on the way that will handle each such port. Seed us with port
4623 80 so web users won't complain that Tor is "slow to start up".
4624 - Make kill -USR1 dump more useful stats about circuits.
4625 - When warning about retrying or giving up, print the address, so
4626 the user knows which one it's talking about.
4627 - If you haven't used a clean circuit in an hour, throw it away,
4628 just to be on the safe side. (This means after 6 hours a totally
4629 unused Tor client will have no circuits open.)
4632 Changes in version 0.0.9rc5 - 2004-12-01
4633 o Bugfixes on 0.0.8.1:
4634 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
4635 - Let resolve conns retry/expire also, rather than sticking around
4637 - If we are using select, make sure we stay within FD_SETSIZE.
4639 o Bugfixes on 0.0.9pre:
4640 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
4641 but doesn't seem to be currently; thanks to Ilja van Sprundel for
4643 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
4644 instead. Impose minima and maxima for all *Period options; impose
4645 even tighter maxima for fetching if we are a caching dirserver.
4646 Clip rather than rejecting.
4647 - Fetch cached running-routers from servers that serve it (that is,
4648 authdirservers and servers running 0.0.9rc5-cvs or later.)
4651 - Accept *:706 (silc) in default exit policy.
4652 - Implement new versioning format for post 0.1.
4653 - Support "foo.nickname.exit" addresses, to let Alice request the
4654 address "foo" as viewed by exit node "nickname". Based on a patch
4656 - Make tor --version --version dump the cvs Id of every file.
4659 Changes in version 0.0.9rc4 - 2004-11-28
4660 o Bugfixes on 0.0.8.1:
4661 - Make windows sockets actually non-blocking (oops), and handle
4662 win32 socket errors better.
4664 o Bugfixes on 0.0.9rc1:
4665 - Actually catch the -USR2 signal.
4668 Changes in version 0.0.9rc3 - 2004-11-25
4669 o Bugfixes on 0.0.8.1:
4670 - Flush the log file descriptor after we print "Tor opening log file",
4671 so we don't see those messages days later.
4673 o Bugfixes on 0.0.9rc1:
4674 - Make tor-resolve work again.
4675 - Avoid infinite loop in tor-resolve if tor hangs up on it.
4676 - Fix an assert trigger for clients/servers handling resolves.
4679 Changes in version 0.0.9rc2 - 2004-11-24
4680 o Bugfixes on 0.0.9rc1:
4681 - I broke socks5 support while fixing the eof bug.
4682 - Allow unitless bandwidths and intervals; they default to bytes
4684 - New servers don't start out hibernating; they are active until
4685 they run out of bytes, so they have a better estimate of how
4686 long it takes, and so their operators can know they're working.
4689 Changes in version 0.0.9rc1 - 2004-11-23
4690 o Bugfixes on 0.0.8.1:
4691 - Finally fix a bug that's been plaguing us for a year:
4692 With high load, circuit package window was reaching 0. Whenever
4693 we got a circuit-level sendme, we were reading a lot on each
4694 socket, but only writing out a bit. So we would eventually reach
4695 eof. This would be noticed and acted on even when there were still
4696 bytes sitting in the inbuf.
4697 - When poll() is interrupted, we shouldn't believe the revents values.
4699 o Bugfixes on 0.0.9pre6:
4700 - Fix hibernate bug that caused pre6 to be broken.
4701 - Don't keep rephist info for routers that haven't had activity for
4702 24 hours. (This matters now that clients have keys, since we track
4704 - Never call close_temp_logs while validating log options.
4705 - Fix backslash-escaping on tor.sh.in and torctl.in.
4708 - Implement weekly/monthly/daily accounting: now you specify your
4709 hibernation properties by
4710 AccountingMax N bytes|KB|MB|GB|TB
4711 AccountingStart day|week|month [day] HH:MM
4712 Defaults to "month 1 0:00".
4713 - Let bandwidth and interval config options be specified as 5 bytes,
4714 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
4715 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
4716 get back to normal.)
4717 - If your requested entry or exit node has advertised bandwidth 0,
4719 - Be more greedy about filling up relay cells -- we try reading again
4720 once we've processed the stuff we read, in case enough has arrived
4721 to fill the last cell completely.
4722 - Apply NT service patch from Osamu Fujino. Still needs more work.
4725 Changes in version 0.0.9pre6 - 2004-11-15
4726 o Bugfixes on 0.0.8.1:
4727 - Fix assert failure on malformed socks4a requests.
4728 - Use identity comparison, not nickname comparison, to choose which
4729 half of circuit-ID-space each side gets to use. This is needed
4730 because sometimes we think of a router as a nickname, and sometimes
4731 as a hex ID, and we can't predict what the other side will do.
4732 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
4733 write() call will fail and we handle it there.
4734 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
4735 and smartlist_len, which are two major profiling offenders.
4737 o Bugfixes on 0.0.9pre5:
4738 - Fix a bug in read_all that was corrupting config files on windows.
4739 - When we're raising the max number of open file descriptors to
4740 'unlimited', don't log that we just raised it to '-1'.
4741 - Include event code with events, as required by control-spec.txt.
4742 - Don't give a fingerprint when clients do --list-fingerprint:
4743 it's misleading, because it will never be the same again.
4744 - Stop using strlcpy in tor_strndup, since it was slowing us
4746 - Remove warn on startup about missing cached-directory file.
4747 - Make kill -USR1 work again.
4748 - Hibernate if we start tor during the "wait for wakeup-time" phase
4749 of an accounting interval. Log our hibernation plans better.
4750 - Authoritative dirservers now also cache their directory, so they
4751 have it on start-up.
4754 - Fetch running-routers; cache running-routers; compress
4755 running-routers; serve compressed running-routers.z
4756 - Add NSI installer script contributed by J Doe.
4757 - Commit VC6 and VC7 workspace/project files.
4758 - Commit a tor.spec for making RPM files, with help from jbash.
4759 - Add contrib/torctl.in contributed by Glenn Fink.
4760 - Implement the control-spec's SAVECONF command, to write your
4761 configuration to torrc.
4762 - Get cookie authentication for the controller closer to working.
4763 - Include control-spec.txt in the tarball.
4764 - When set_conf changes our server descriptor, upload a new copy.
4765 But don't upload it too often if there are frequent changes.
4766 - Document authentication config in man page, and document signals
4768 - Clean up confusing parts of man page and torrc.sample.
4769 - Make expand_filename handle ~ and ~username.
4770 - Use autoconf to enable largefile support where necessary. Use
4771 ftello where available, since ftell can fail at 2GB.
4772 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
4773 log more informatively.
4774 - Give a slightly more useful output for "tor -h".
4775 - Refuse application socks connections to port 0.
4776 - Check clock skew for verified servers, but allow unverified
4777 servers and clients to have any clock skew.
4778 - Break DirFetchPostPeriod into:
4779 - DirFetchPeriod for fetching full directory,
4780 - StatusFetchPeriod for fetching running-routers,
4781 - DirPostPeriod for posting server descriptor,
4782 - RendPostPeriod for posting hidden service descriptors.
4783 - Make sure the hidden service descriptors are at a random offset
4784 from each other, to hinder linkability.
4787 Changes in version 0.0.9pre5 - 2004-11-09
4788 o Bugfixes on 0.0.9pre4:
4789 - Fix a seg fault in unit tests (doesn't affect main program).
4790 - Fix an assert bug where a hidden service provider would fail if
4791 the first hop of his rendezvous circuit was down.
4792 - Hidden service operators now correctly handle version 1 style
4793 INTRODUCE1 cells (nobody generates them still, so not a critical
4795 - If do_hup fails, actually notice.
4796 - Handle more errnos from accept() without closing the listener.
4797 Some OpenBSD machines were closing their listeners because
4798 they ran out of file descriptors.
4799 - Send resolve cells to exit routers that are running a new
4800 enough version of the resolve code to work right.
4801 - Better handling of winsock includes on non-MSV win32 compilers.
4802 - Some people had wrapped their tor client/server in a script
4803 that would restart it whenever it died. This did not play well
4804 with our "shut down if your version is obsolete" code. Now people
4805 don't fetch a new directory if their local cached version is
4807 - Make our autogen.sh work on ksh as well as bash.
4810 - Hibernation: New config option "AccountingMaxKB" lets you
4811 set how many KBytes per month you want to allow your server to
4812 consume. Rather than spreading those bytes out evenly over the
4813 month, we instead hibernate for some of the month and pop up
4814 at a deterministic time, work until the bytes are consumed, then
4815 hibernate again. Config option "MonthlyAccountingStart" lets you
4816 specify which day of the month your billing cycle starts on.
4817 - Control interface: a separate program can now talk to your
4818 client/server over a socket, and get/set config options, receive
4819 notifications of circuits and streams starting/finishing/dying,
4820 bandwidth used, etc. The next step is to get some GUIs working.
4821 Let us know if you want to help out. See doc/control-spec.txt .
4822 - Ship a contrib/tor-control.py as an example script to interact
4823 with the control port.
4824 - "tor --hash-password zzyxz" will output a salted password for
4825 use in authenticating to the control interface.
4826 - New log format in config:
4827 "Log minsev[-maxsev] stdout|stderr|syslog" or
4828 "Log minsev[-maxsev] file /var/foo"
4831 - DirPolicy config option, to let people reject incoming addresses
4832 from their dirserver.
4833 - "tor --list-fingerprint" will list your identity key fingerprint
4835 - Add "pass" target for RedirectExit, to make it easier to break
4836 out of a sequence of RedirectExit rules.
4837 - Clients now generate a TLS cert too, in preparation for having
4838 them act more like real nodes.
4839 - Ship src/win32/ in the tarball, so people can use it to build.
4840 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
4842 - New "router-status" line in directory, to better bind each verified
4843 nickname to its identity key.
4844 - Deprecate unofficial config option abbreviations, and abbreviations
4845 not on the command line.
4846 - Add a pure-C tor-resolve implementation.
4847 - Use getrlimit and friends to ensure we can reach MaxConn (currently
4848 1024) file descriptors.
4850 o Code security improvements, inspired by Ilja:
4851 - Replace sprintf with snprintf. (I think they were all safe, but
4853 - Replace strcpy/strncpy with strlcpy in more places.
4854 - Avoid strcat; use snprintf or strlcat instead.
4855 - snprintf wrapper with consistent (though not C99) overflow behavior.
4858 Changes in version 0.0.9pre4 - 2004-10-17
4859 o Bugfixes on 0.0.9pre3:
4860 - If the server doesn't specify an exit policy, use the real default
4861 exit policy, not reject *:*.
4862 - Ignore fascistfirewall when uploading/downloading hidden service
4863 descriptors, since we go through Tor for those; and when using
4864 an HttpProxy, since we assume it can reach them all.
4865 - When looking for an authoritative dirserver, use only the ones
4866 configured at boot. Don't bother looking in the directory.
4867 - The rest of the fix for get_default_conf_file() on older win32.
4868 - Make 'Routerfile' config option obsolete.
4871 - New 'MyFamily nick1,...' config option for a server to
4872 specify other servers that shouldn't be used in the same circuit
4873 with it. Only believed if nick1 also specifies us.
4874 - New 'NodeFamily nick1,nick2,...' config option for a client to
4875 specify nodes that it doesn't want to use in the same circuit.
4876 - New 'Redirectexit pattern address:port' config option for a
4877 server to redirect exit connections, e.g. to a local squid.
4880 Changes in version 0.0.9pre3 - 2004-10-13
4881 o Bugfixes on 0.0.8.1:
4882 - Better torrc example lines for dirbindaddress and orbindaddress.
4883 - Improved bounds checking on parsed ints (e.g. config options and
4884 the ones we find in directories.)
4885 - Better handling of size_t vs int, so we're more robust on 64
4887 - Fix the rest of the bug where a newly started OR would appear
4888 as unverified even after we've added his fingerprint and hupped
4890 - Fix a bug from 0.0.7: when read() failed on a stream, we would
4891 close it without sending back an end. So 'connection refused'
4892 would simply be ignored and the user would get no response.
4894 o Bugfixes on 0.0.9pre2:
4895 - Serving the cached-on-disk directory to people is bad. We now
4896 provide no directory until we've fetched a fresh one.
4897 - Workaround for bug on windows where cached-directories get crlf
4899 - Make get_default_conf_file() work on older windows too.
4900 - If we write a *:* exit policy line in the descriptor, don't write
4901 any more exit policy lines.
4904 - Use only 0.0.9pre1 and later servers for resolve cells.
4905 - Make the dirservers file obsolete.
4906 - Include a dir-signing-key token in directories to tell the
4907 parsing entity which key is being used to sign.
4908 - Remove the built-in bulky default dirservers string.
4909 - New config option "Dirserver %s:%d [fingerprint]", which can be
4910 repeated as many times as needed. If no dirservers specified,
4911 default to moria1,moria2,tor26.
4912 - Make moria2 advertise a dirport of 80, so people behind firewalls
4913 will be able to get a directory.
4914 - Http proxy support
4915 - Dirservers translate requests for http://%s:%d/x to /x
4916 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
4917 be routed through this host.
4918 - Clients ask for /tor/x rather than /x for new enough dirservers.
4919 This way we can one day coexist peacefully with apache.
4920 - Clients specify a "Host: %s%d" http header, to be compatible
4921 with more proxies, and so running squid on an exit node can work.
4924 Changes in version 0.0.8.1 - 2004-10-13
4926 - Fix a seg fault that can be triggered remotely for Tor
4927 clients/servers with an open dirport.
4928 - Fix a rare assert trigger, where routerinfos for entries in
4929 our cpath would expire while we're building the path.
4930 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4931 - Fix a rare seg fault for people running hidden services on
4932 intermittent connections.
4933 - Fix a bug in parsing opt keywords with objects.
4934 - Fix a stale pointer assert bug when a stream detaches and
4936 - Fix a string format vulnerability (probably not exploitable)
4937 in reporting stats locally.
4938 - Fix an assert trigger: sometimes launching circuits can fail
4939 immediately, e.g. because too many circuits have failed recently.
4940 - Fix a compile warning on 64 bit platforms.
4943 Changes in version 0.0.9pre2 - 2004-10-03
4945 - Make fetching a cached directory work for 64-bit platforms too.
4946 - Make zlib.h a required header, not an optional header.
4949 Changes in version 0.0.9pre1 - 2004-10-01
4951 - Stop using separate defaults for no-config-file and
4952 empty-config-file. Now you have to explicitly turn off SocksPort,
4953 if you don't want it open.
4954 - Fix a bug in OutboundBindAddress so it (hopefully) works.
4955 - Improve man page to mention more of the 0.0.8 features.
4956 - Fix a rare seg fault for people running hidden services on
4957 intermittent connections.
4958 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
4960 - Fix more dns related bugs: send back resolve_failed and end cells
4961 more reliably when the resolve fails, rather than closing the
4962 circuit and then trying to send the cell. Also attach dummy resolve
4963 connections to a circuit *before* calling dns_resolve(), to fix
4964 a bug where cached answers would never be sent in RESOLVED cells.
4965 - When we run out of disk space, or other log writing error, don't
4966 crash. Just stop logging to that log and continue.
4967 - We were starting to daemonize before we opened our logs, so if
4968 there were any problems opening logs, we would complain to stderr,
4969 which wouldn't work, and then mysteriously exit.
4970 - Fix a rare bug where sometimes a verified OR would connect to us
4971 before he'd uploaded his descriptor, which would cause us to
4972 assign conn->nickname as though he's unverified. Now we look through
4973 the fingerprint list to see if he's there.
4974 - Fix a rare assert trigger, where routerinfos for entries in
4975 our cpath would expire while we're building the path.
4978 - Clients can ask dirservers for /dir.z to get a compressed version
4979 of the directory. Only works for servers running 0.0.9, of course.
4980 - Make clients cache directories and use them to seed their router
4981 lists at startup. This means clients have a datadir again.
4982 - Configuration infrastructure support for warning on obsolete
4984 - Respond to content-encoding headers by trying to uncompress as
4986 - Reply with a deflated directory when a client asks for "dir.z".
4987 We could use allow-encodings instead, but allow-encodings isn't
4988 specified in HTTP 1.0.
4989 - Raise the max dns workers from 50 to 100.
4990 - Discourage people from setting their dirfetchpostperiod more often
4991 than once per minute.
4992 - Protect dirservers from overzealous descriptor uploading -- wait
4993 10 seconds after directory gets dirty, before regenerating.
4996 Changes in version 0.0.8 - 2004-08-25
4997 o Port it to SunOS 5.9 / Athena
5000 Changes in version 0.0.8rc2 - 2004-08-20
5001 o Make it compile on cygwin again.
5002 o When picking unverified routers, skip those with low uptime and/or
5003 low bandwidth, depending on what properties you care about.
5006 Changes in version 0.0.8rc1 - 2004-08-18
5007 o Changes from 0.0.7.3:
5009 - Fix assert triggers: if the other side returns an address 0.0.0.0,
5010 don't put it into the client dns cache.
5011 - If a begin failed due to exit policy, but we believe the IP address
5012 should have been allowed, switch that router to exitpolicy reject *:*
5013 until we get our next directory.
5015 - Clients choose nodes proportional to advertised bandwidth.
5016 - Avoid using nodes with low uptime as introduction points.
5017 - Handle servers with dynamic IP addresses: don't replace
5018 options->Address with the resolved one at startup, and
5019 detect our address right before we make a routerinfo each time.
5020 - 'FascistFirewall' option to pick dirservers and ORs on specific
5021 ports; plus 'FirewallPorts' config option to tell FascistFirewall
5022 which ports are open. (Defaults to 80,443)
5023 - Be more aggressive about trying to make circuits when the network
5024 has changed (e.g. when you unsuspend your laptop).
5025 - Check for time skew on http headers; report date in response to
5027 - If the entrynode config line has only one node, don't pick it as
5029 - Add strict{entry|exit}nodes config options. If set to 1, then
5030 we refuse to build circuits that don't include the specified entry
5032 - OutboundBindAddress config option, to bind to a specific
5033 IP address for outgoing connect()s.
5034 - End truncated log entries (e.g. directories) with "[truncated]".
5036 o Patches to 0.0.8preX:
5038 - Patches to compile and run on win32 again (maybe)?
5039 - Fix crash when looking for ~/.torrc with no $HOME set.
5040 - Fix a race bug in the unit tests.
5041 - Handle verified/unverified name collisions better when new
5042 routerinfo's arrive in a directory.
5043 - Sometimes routers were getting entered into the stats before
5044 we'd assigned their identity_digest. Oops.
5045 - Only pick and establish intro points after we've gotten a
5048 - AllowUnverifiedNodes config option to let circuits choose no-name
5049 routers in entry,middle,exit,introduction,rendezvous positions.
5050 Allow middle and rendezvous positions by default.
5051 - Add a man page for tor-resolve.
5054 Changes in version 0.0.7.3 - 2004-08-12
5055 o Stop dnsworkers from triggering an assert failure when you
5056 ask them to resolve the host "".
5059 Changes in version 0.0.8pre3 - 2004-08-09
5060 o Changes from 0.0.7.2:
5061 - Allow multiple ORs with same nickname in routerlist -- now when
5062 people give us one identity key for a nickname, then later
5063 another, we don't constantly complain until the first expires.
5064 - Remember used bandwidth (both in and out), and publish 15-minute
5065 snapshots for the past day into our descriptor.
5066 - You can now fetch $DIRURL/running-routers to get just the
5067 running-routers line, not the whole descriptor list. (But
5068 clients don't use this yet.)
5069 - When people mistakenly use Tor as an http proxy, point them
5070 at the tor-doc.html rather than the INSTALL.
5071 - Remove our mostly unused -- and broken -- hex_encode()
5072 function. Use base16_encode() instead. (Thanks to Timo Lindfors
5073 for pointing out this bug.)
5074 - Rotate onion keys every 12 hours, not every 2 hours, so we have
5075 fewer problems with people using the wrong key.
5076 - Change the default exit policy to reject the default edonkey,
5077 kazaa, gnutella ports.
5078 - Add replace_file() to util.[ch] to handle win32's rename().
5080 o Changes from 0.0.8preX:
5081 - Fix two bugs in saving onion keys to disk when rotating, so
5082 hopefully we'll get fewer people using old onion keys.
5083 - Fix an assert error that was making SocksPolicy not work.
5084 - Be willing to expire routers that have an open dirport -- it's
5085 just the authoritative dirservers we want to not forget.
5086 - Reject tor-resolve requests for .onion addresses early, so we
5087 don't build a whole rendezvous circuit and then fail.
5088 - When you're warning a server that he's unverified, don't cry
5090 - Fix a race condition: don't try to extend onto a connection
5091 that's still handshaking.
5092 - For servers in clique mode, require the conn to be open before
5093 you'll choose it for your path.
5094 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
5095 end relay cell, etc.
5096 - Measure bandwidth capacity over the last 24 hours, not just 12
5097 - Bugfix: authoritative dirservers were making and signing a new
5098 directory for each client, rather than reusing the cached one.
5101 Changes in version 0.0.8pre2 - 2004-08-04
5102 o Changes from 0.0.7.2:
5104 - Check directory signature _before_ you decide whether you're
5105 you're running an obsolete version and should exit.
5106 - Check directory signature _before_ you parse the running-routers
5107 list to decide who's running or verified.
5108 - Bugfixes and features:
5109 - Check return value of fclose while writing to disk, so we don't
5110 end up with broken files when servers run out of disk space.
5111 - Log a warning if the user uses an unsafe socks variant, so people
5112 are more likely to learn about privoxy or socat.
5113 - Dirservers now include RFC1123-style dates in the HTTP headers,
5114 which one day we will use to better detect clock skew.
5116 o Changes from 0.0.8pre1:
5117 - Make it compile without warnings again on win32.
5118 - Log a warning if you're running an unverified server, to let you
5119 know you might want to get it verified.
5120 - Only pick a default nickname if you plan to be a server.
5123 Changes in version 0.0.8pre1 - 2004-07-23
5125 - Made our unit tests compile again on OpenBSD 3.5, and tor
5126 itself compile again on OpenBSD on a sparc64.
5127 - We were neglecting milliseconds when logging on win32, so
5128 everything appeared to happen at the beginning of each second.
5131 - 'Extend' relay cell payloads now include the digest of the
5132 intended next hop's identity key. Now we can verify that we're
5133 extending to the right router, and also extend to routers we
5134 hadn't heard of before.
5137 - Tor nodes can now act as relays (with an advertised ORPort)
5138 without being manually verified by the dirserver operators.
5139 - Uploaded descriptors of unverified routers are now accepted
5140 by the dirservers, and included in the directory.
5141 - Verified routers are listed by nickname in the running-routers
5142 list; unverified routers are listed as "$<fingerprint>".
5143 - We now use hash-of-identity-key in most places rather than
5144 nickname or addr:port, for improved security/flexibility.
5145 - To avoid Sybil attacks, paths still use only verified servers.
5146 But now we have a chance to play around with hybrid approaches.
5147 - Nodes track bandwidth usage to estimate capacity (not used yet).
5148 - ClientOnly option for nodes that never want to become servers.
5149 - Directory caching.
5150 - "AuthoritativeDir 1" option for the official dirservers.
5151 - Now other nodes (clients and servers) will cache the latest
5152 directory they've pulled down.
5153 - They can enable their DirPort to serve it to others.
5154 - Clients will pull down a directory from any node with an open
5155 DirPort, and check the signature/timestamp correctly.
5156 - Authoritative dirservers now fetch directories from other
5157 authdirservers, to stay better synced.
5158 - Running-routers list tells who's down also, along with noting
5159 if they're verified (listed by nickname) or unverified (listed
5161 - Allow dirservers to serve running-router list separately.
5162 This isn't used yet.
5163 - ORs connect-on-demand to other ORs
5164 - If you get an extend cell to an OR you're not connected to,
5165 connect, handshake, and forward the create cell.
5166 - The authoritative dirservers stay connected to everybody,
5167 and everybody stays connected to 0.0.7 servers, but otherwise
5168 clients/servers expire unused connections after 5 minutes.
5169 - When servers get a sigint, they delay 30 seconds (refusing new
5170 connections) then exit. A second sigint causes immediate exit.
5171 - File and name management:
5172 - Look for .torrc if no CONFDIR "torrc" is found.
5173 - If no datadir is defined, then choose, make, and secure ~/.tor
5175 - If torrc not found, exitpolicy reject *:*.
5176 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
5177 - If no nickname is defined, derive default from hostname.
5178 - Rename secret key files, e.g. identity.key -> secret_id_key,
5179 to discourage people from mailing their identity key to tor-ops.
5180 - Refuse to build a circuit before the directory has arrived --
5181 it won't work anyway, since you won't know the right onion keys
5183 - Try other dirservers immediately if the one you try is down. This
5184 should tolerate down dirservers better now.
5185 - Parse tor version numbers so we can do an is-newer-than check
5186 rather than an is-in-the-list check.
5187 - New socks command 'resolve', to let us shim gethostbyname()
5189 - A 'tor_resolve' script to access the socks resolve functionality.
5190 - A new socks-extensions.txt doc file to describe our
5191 interpretation and extensions to the socks protocols.
5192 - Add a ContactInfo option, which gets published in descriptor.
5193 - Publish OR uptime in descriptor (and thus in directory) too.
5194 - Write tor version at the top of each log file
5195 - New docs in the tarball:
5197 - Document that you should proxy your SSL traffic too.
5200 Changes in version 0.0.7.2 - 2004-07-07
5201 o A better fix for the 0.0.0.0 problem, that will hopefully
5202 eliminate the remaining related assertion failures.
5205 Changes in version 0.0.7.1 - 2004-07-04
5206 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
5207 since internally we use 0.0.0.0 to signify "not yet resolved".
5210 Changes in version 0.0.7 - 2004-06-07
5211 o Updated the man page to reflect the new features.
5214 Changes in version 0.0.7rc2 - 2004-06-06
5215 o Changes from 0.0.7rc1:
5216 - Make it build on Win32 again.
5217 o Changes from 0.0.6.2:
5218 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
5222 Changes in version 0.0.7rc1 - 2004-06-02
5224 - On sighup, we were adding another log without removing the first
5225 one. So log messages would get duplicated n times for n sighups.
5226 - Several cases of using a connection after we'd freed it. The
5227 problem was that connections that are pending resolve are in both
5228 the pending_resolve tree, and also the circuit's resolving_streams
5229 list. When you want to remove one, you must remove it from both.
5230 - Fix a double-mark-for-close where an end cell arrived for a
5231 resolving stream, and then the resolve failed.
5232 - Check directory signatures based on name of signer, not on whom
5233 we got the directory from. This will let us cache directories more
5236 - Crank up some of our constants to handle more users.
5239 Changes in version 0.0.7pre1 - 2004-06-02
5240 o Fixes for crashes and other obnoxious bugs:
5241 - Fix an epipe bug: sometimes when directory connections failed
5242 to connect, we would give them a chance to flush before closing
5244 - When we detached from a circuit because of resolvefailed, we
5245 would immediately try the same circuit twice more, and then
5246 give up on the resolve thinking we'd tried three different
5248 - Limit the number of intro circuits we'll attempt to build for a
5249 hidden service per 15-minute period.
5250 - Check recommended-software string *early*, before actually parsing
5251 the directory. Thus we can detect an obsolete version and exit,
5252 even if the new directory format doesn't parse.
5253 o Fixes for security bugs:
5254 - Remember which nodes are dirservers when you startup, and if a
5255 random OR enables his dirport, don't automatically assume he's
5256 a trusted dirserver.
5258 - Directory connections were asking the wrong poll socket to
5259 start writing, and not asking themselves to start writing.
5260 - When we detached from a circuit because we sent a begin but
5261 didn't get a connected, we would use it again the first time;
5262 but after that we would correctly switch to a different one.
5263 - Stop warning when the first onion decrypt attempt fails; they
5264 will sometimes legitimately fail now that we rotate keys.
5265 - Override unaligned-access-ok check when $host_cpu is ia64 or
5266 arm. Apparently they allow it but the kernel whines.
5267 - Dirservers try to reconnect periodically too, in case connections
5269 - Fix some memory leaks in directory servers.
5270 - Allow backslash in Win32 filenames.
5271 - Made Tor build complain-free on FreeBSD, hopefully without
5272 breaking other BSD builds. We'll see.
5274 - Doxygen markup on all functions and global variables.
5275 - Make directory functions update routerlist, not replace it. So
5276 now directory disagreements are not so critical a problem.
5277 - Remove the upper limit on number of descriptors in a dirserver's
5278 directory (not that we were anywhere close).
5279 - Allow multiple logfiles at different severity ranges.
5280 - Allow *BindAddress to specify ":port" rather than setting *Port
5281 separately. Allow multiple instances of each BindAddress config
5282 option, so you can bind to multiple interfaces if you want.
5283 - Allow multiple exit policy lines, which are processed in order.
5284 Now we don't need that huge line with all the commas in it.
5285 - Enable accept/reject policies on SOCKS connections, so you can bind
5286 to 0.0.0.0 but still control who can use your OP.
5289 Changes in version 0.0.6.2 - 2004-05-16
5290 o Our integrity-checking digest was checking only the most recent cell,
5291 not the previous cells like we'd thought.
5292 Thanks to Stefan Mark for finding the flaw!
5295 Changes in version 0.0.6.1 - 2004-05-06
5296 o Fix two bugs in our AES counter-mode implementation (this affected
5297 onion-level stream encryption, but not TLS-level). It turns
5298 out we were doing something much more akin to a 16-character
5299 polyalphabetic cipher. Oops.
5300 Thanks to Stefan Mark for finding the flaw!
5301 o Retire moria3 as a directory server, and add tor26 as a directory
5305 Changes in version 0.0.6 - 2004-05-02
5309 Changes in version 0.0.6rc4 - 2004-05-01
5310 o Update the built-in dirservers list to use the new directory format
5311 o Fix a rare seg fault: if a node offering a hidden service attempts
5312 to build a circuit to Alice's rendezvous point and fails before it
5313 reaches the last hop, it retries with a different circuit, but
5315 o Handle windows socket errors correctly.
5318 Changes in version 0.0.6rc3 - 2004-04-28
5319 o Don't expire non-general excess circuits (if we had enough
5320 circuits open, we were expiring rendezvous circuits -- even
5321 when they had a stream attached. oops.)
5322 o Fetch randomness from /dev/urandom better (not via fopen/fread)
5323 o Better debugging for tls errors
5324 o Some versions of openssl have an SSL_pending function that erroneously
5325 returns bytes when there is a non-application record pending.
5326 o Set Content-Type on the directory and hidserv descriptor.
5327 o Remove IVs from cipher code, since AES-ctr has none.
5328 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
5329 o We were using an array of length zero in a few places.
5330 o win32's gethostbyname can't resolve an IP to an IP.
5331 o win32's close can't close a socket.
5334 Changes in version 0.0.6rc2 - 2004-04-26
5335 o Fix a bug where we were closing tls connections intermittently.
5336 It turns out openssl keeps its errors around -- so if an error
5337 happens, and you don't ask about it, and then another openssl
5338 operation happens and succeeds, and you ask if there was an error,
5339 it tells you about the first error. Fun fun.
5340 o Fix a bug that's been lurking since 27 may 03 (!)
5341 When passing back a destroy cell, we would use the wrong circ id.
5342 'Mostly harmless', but still worth fixing.
5343 o Since we don't support truncateds much, don't bother sending them;
5344 just close the circ.
5345 o check for <machine/limits.h> so we build on NetBSD again (I hope).
5346 o don't crash if a conn that sent a begin has suddenly lost its circuit
5347 (this was quite rare).
5350 Changes in version 0.0.6rc1 - 2004-04-25
5351 o We now rotate link (tls context) keys and onion keys.
5352 o CREATE cells now include oaep padding, so you can tell
5353 if you decrypted them correctly.
5354 o Add bandwidthburst to server descriptor.
5355 o Directories now say which dirserver signed them.
5356 o Use a tor_assert macro that logs failed assertions too.
5359 Changes in version 0.0.6pre5 - 2004-04-18
5360 o changes from 0.0.6pre4:
5361 - make tor build on broken freebsd 5.2 installs
5362 - fix a failed assert when you try an intro point, get a nack, and try
5363 a second one and it works.
5364 - when alice uses a port that the hidden service doesn't accept,
5365 it now sends back an end cell (denied by exit policy). otherwise
5366 alice would just have to wait to time out.
5367 - fix another rare bug: when we had tried all the intro
5368 points for a hidden service, we fetched the descriptor
5369 again, but we left our introcirc thinking it had already
5370 sent an intro, so it kept waiting for a response...
5371 - bugfix: when you sleep your hidden-service laptop, as soon
5372 as it wakes up it tries to upload a service descriptor, but
5373 socketpair fails for some reason (localhost not up yet?).
5374 now we simply give up on that upload, and we'll try again later.
5375 i'd still like to find the bug though.
5376 - if an intro circ waiting for an ack dies before getting one, then
5378 - we were reusing stale service descriptors and refetching usable
5382 Changes in version 0.0.6pre4 - 2004-04-14
5383 o changes from 0.0.6pre3:
5384 - when bob fails to connect to the rendezvous point, and his
5385 circ didn't fail because of the rendezvous point itself, then
5386 he retries a couple of times
5387 - we expire introduction and rendezvous circs more thoroughly
5388 (sometimes they were hanging around forever)
5389 - we expire unattached rendezvous streams that have been around
5390 too long (they were sticking around forever).
5391 - fix a measly fencepost error that was crashing everybody with
5395 Changes in version 0.0.6pre3 - 2004-04-14
5396 o changes from 0.0.6pre2:
5397 - make hup work again
5398 - fix some memory leaks for dirservers
5399 - allow more skew in rendezvous descriptor timestamps, to help
5400 handle people like blanu who don't know what time it is
5401 - normal circs are 3 hops, but some rend/intro circs are 4, if
5402 the initiator doesn't get to choose the last hop
5403 - send acks for introductions, so alice can know whether to try
5405 - bob publishes intro points more correctly
5406 o changes from 0.0.5:
5407 - fix an assert trigger that's been plaguing us since the days
5408 of 0.0.2prexx (thanks weasel!)
5409 - retry stream correctly when we fail to connect because of
5410 exit-policy-reject (should try another) or can't-resolve-address
5411 (also should try another, because dns on random internet servers
5413 - when we hup a dirserver and we've *removed* a server from the
5414 approved-routers list, now we remove that server from the
5415 in-memory directories too
5418 Changes in version 0.0.6pre2 - 2004-04-08
5419 o We fixed our base32 implementation. Now it works on all architectures.
5422 Changes in version 0.0.6pre1 - 2004-04-08
5424 - Hidden services and rendezvous points are implemented. Go to
5425 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
5426 hidden services. (This only works via a socks4a proxy such as
5427 Privoxy, and currently it's quite slow.)
5430 Changes in version 0.0.5 - 2004-03-30
5434 Changes in version 0.0.5rc3 - 2004-03-29
5435 o Install torrc as torrc.sample -- we no longer clobber your
5437 o Re-enable recommendedversion checking (we broke it in rc2, oops)
5438 o Add in a 'notice' log level for things the operator should hear
5439 but that aren't warnings
5442 Changes in version 0.0.5rc2 - 2004-03-29
5443 o Hold socks connection open until reply is flushed (if possible)
5444 o Make exit nodes resolve IPs to IPs immediately, rather than asking
5445 the dns farm to do it.
5446 o Fix c99 aliasing warnings in rephist.c
5447 o Don't include server descriptors that are older than 24 hours in the
5449 o Give socks 'reject' replies their whole 15s to attempt to flush,
5450 rather than seeing the 60s timeout and assuming the flush had failed.
5451 o Clean automake droppings from the cvs repository
5454 Changes in version 0.0.5rc1 - 2004-03-28
5455 o Fix mangled-state bug in directory fetching (was causing sigpipes).
5456 o Only build circuits after we've fetched the directory: clients were
5457 using only the directory servers before they'd fetched a directory.
5458 This also means longer startup time; so it goes.
5459 o Fix an assert trigger where an OP would fail to handshake, and we'd
5460 expect it to have a nickname.
5461 o Work around a tsocks bug: do a socks reject when AP connection dies
5462 early, else tsocks goes into an infinite loop.
5465 Changes in version 0.0.4 - 2004-03-26
5466 o When connecting to a dirserver or OR and the network is down,
5470 Changes in version 0.0.3 - 2004-03-26
5471 o Warn and fail if server chose a nickname with illegal characters
5472 o Port to Solaris and Sparc:
5473 - include missing header fcntl.h
5474 - have autoconf find -lsocket -lnsl automatically
5475 - deal with hardware word alignment
5476 - make uname() work (solaris has a different return convention)
5477 - switch from using signal() to sigaction()
5478 o Preliminary work on reputation system:
5479 - Keep statistics on success/fail of connect attempts; they're published
5480 by kill -USR1 currently.
5481 - Add a RunTesting option to try to learn link state by creating test
5482 circuits, even when SocksPort is off.
5483 - Remove unused open circuits when there are too many.
5486 Changes in version 0.0.2 - 2004-03-19
5487 - Include strlcpy and strlcat for safer string ops
5488 - define INADDR_NONE so we compile (but still not run) on solaris
5491 Changes in version 0.0.2pre27 - 2004-03-14
5493 - Allow internal tor networks (we were rejecting internal IPs,
5494 now we allow them if they're set explicitly).
5495 - And fix a few endian issues.
5498 Changes in version 0.0.2pre26 - 2004-03-14
5500 - If a stream times out after 15s without a connected cell, don't
5501 try that circuit again: try a new one.
5502 - Retry streams at most 4 times. Then give up.
5503 - When a dirserver gets a descriptor from an unknown router, it
5504 logs its fingerprint (so the dirserver operator can choose to
5505 accept it even without mail from the server operator).
5506 - Inform unapproved servers when we reject their descriptors.
5507 - Make tor build on Windows again. It works as a client, who knows
5509 - Clearer instructions in the torrc for how to set up a server.
5510 - Be more efficient about reading fd's when our global token bucket
5511 (used for rate limiting) becomes empty.
5513 - Stop asserting that computers always go forward in time. It's
5515 - When we sent a cell (e.g. destroy) and then marked an OR connection
5516 expired, we might close it before finishing a flush if the other
5517 side isn't reading right then.
5518 - Don't allow dirservers to start if they haven't defined
5520 - We were caching transient dns failures. Oops.
5521 - Prevent servers from publishing an internal IP as their address.
5522 - Address a strcat vulnerability in circuit.c
5525 Changes in version 0.0.2pre25 - 2004-03-04
5527 - Put the OR's IP in its router descriptor, not its fqdn. That way
5528 we'll stop being stalled by gethostbyname for nodes with flaky dns,
5531 - If the user typed in an address that didn't resolve, the server
5535 Changes in version 0.0.2pre24 - 2004-03-03
5537 - Fix an assertion failure in dns.c, where we were trying to dequeue
5538 a pending dns resolve even if it wasn't pending
5539 - Fix a spurious socks5 warning about still trying to write after the
5540 connection is finished.
5541 - Hold certain marked_for_close connections open until they're finished
5542 flushing, rather than losing bytes by closing them too early.
5543 - Correctly report the reason for ending a stream
5544 - Remove some duplicate calls to connection_mark_for_close
5545 - Put switch_id and start_daemon earlier in the boot sequence, so it
5546 will actually try to chdir() to options.DataDirectory
5547 - Make 'make test' exit(1) if a test fails; fix some unit tests
5548 - Make tor fail when you use a config option it doesn't know about,
5549 rather than warn and continue.
5550 - Make --version work
5551 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
5554 Changes in version 0.0.2pre23 - 2004-02-29
5556 - Print a statement when the first circ is finished, so the user
5558 - If a relay cell is unrecognized at the end of the circuit,
5559 send back a destroy. (So attacks to mutate cells are more
5561 - New config option 'excludenodes' to avoid certain nodes for circuits.
5562 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
5563 so you can collect coredumps there.
5565 - Fix a bug in tls flushing where sometimes data got wedged and
5566 didn't flush until more data got sent. Hopefully this bug was
5567 a big factor in the random delays we were seeing.
5568 - Make 'connected' cells include the resolved IP, so the client
5569 dns cache actually gets populated.
5570 - Disallow changing from ORPort=0 to ORPort>0 on hup.
5571 - When we time-out on a stream and detach from the circuit, send an
5572 end cell down it first.
5573 - Only warn about an unknown router (in exitnodes, entrynodes,
5574 excludenodes) after we've fetched a directory.
5577 Changes in version 0.0.2pre22 - 2004-02-26
5579 - Servers publish less revealing uname information in descriptors.
5580 - More memory tracking and assertions, to crash more usefully when
5582 - If the default torrc isn't there, just use some default defaults.
5583 Plus provide an internal dirservers file if they don't have one.
5584 - When the user tries to use Tor as an http proxy, give them an http
5585 501 failure explaining that we're a socks proxy.
5586 - Dump a new router.desc on hup, to help confused people who change
5587 their exit policies and then wonder why router.desc doesn't reflect
5589 - Clean up the generic tor.sh init script that we ship with.
5591 - If the exit stream is pending on the resolve, and a destroy arrives,
5592 then the stream wasn't getting removed from the pending list. I
5593 think this was the one causing recent server crashes.
5594 - Use a more robust poll on OSX 10.3, since their poll is flaky.
5595 - When it couldn't resolve any dirservers, it was useless from then on.
5596 Now it reloads the RouterFile (or default dirservers) if it has no
5598 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
5599 many users don't even *have* a /usr/local/sbin/.
5602 Changes in version 0.0.2pre21 - 2004-02-18
5604 - There's a ChangeLog file that actually reflects the changelog.
5605 - There's a 'torify' wrapper script, with an accompanying
5606 tor-tsocks.conf, that simplifies the process of using tsocks for
5607 tor. It even has a man page.
5608 - The tor binary gets installed to sbin rather than bin now.
5609 - Retry streams where the connected cell hasn't arrived in 15 seconds
5610 - Clean up exit policy handling -- get the default out of the torrc,
5611 so we can update it without forcing each server operator to fix
5613 - Allow imaps and pop3s in default exit policy
5615 - Prevent picking middleman nodes as the last node in the circuit
5618 Changes in version 0.0.2pre20 - 2004-01-30
5620 - We now have a deb package, and it's in debian unstable. Go to
5622 - I've split the TotalBandwidth option into BandwidthRate (how many
5623 bytes per second you want to allow, long-term) and
5624 BandwidthBurst (how many bytes you will allow at once before the cap
5625 kicks in). This better token bucket approach lets you, say, set
5626 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
5627 performance while not exceeding your monthly bandwidth quota.
5628 - Push out a tls record's worth of data once you've got it, rather
5629 than waiting until you've read everything waiting to be read. This
5630 may improve performance by pipelining better. We'll see.
5631 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
5632 from failed circuits (if they haven't been connected yet) and attach
5634 - Expire old streams that haven't managed to connect. Some day we'll
5635 have them reattach to new circuits instead.
5638 - Fix several memory leaks that were causing servers to become bloated
5640 - Fix a few very rare assert triggers. A few more remain.
5641 - Setuid to User _before_ complaining about running as root.
5644 Changes in version 0.0.2pre19 - 2004-01-07
5646 - Fix deadlock condition in dns farm. We were telling a child to die by
5647 closing the parent's file descriptor to him. But newer children were
5648 inheriting the open file descriptor from the parent, and since they
5649 weren't closing it, the socket never closed, so the child never read
5650 eof, so he never knew to exit. Similarly, dns workers were holding
5651 open other sockets, leading to all sorts of chaos.
5652 - New cleaner daemon() code for forking and backgrounding.
5653 - If you log to a file, it now prints an entry at the top of the
5654 logfile so you know it's working.
5655 - The onionskin challenge length was 30 bytes longer than necessary.
5656 - Started to patch up the spec so it's not quite so out of date.
5659 Changes in version 0.0.2pre18 - 2004-01-02
5661 - Fix endian issues with the 'integrity' field in the relay header.
5662 - Fix a potential bug where connections in state
5663 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
5666 Changes in version 0.0.2pre17 - 2003-12-30
5668 - Made --debuglogfile (or any second log file, actually) work.
5669 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
5670 adversary could force us into an infinite loop.
5673 - Each onionskin handshake now includes a hash of the computed key,
5674 to prove the server's identity and help perfect forward secrecy.
5675 - Changed cell size from 256 to 512 bytes (working toward compatibility
5677 - Changed cell length to 2 bytes, and moved it to the relay header.
5678 - Implemented end-to-end integrity checking for the payloads of
5680 - Separated streamid from 'recognized' (otherwise circuits will get
5681 messed up when we try to have streams exit from the middle). We
5682 use the integrity-checking to confirm that a cell is addressed to
5684 - Randomize the initial circid and streamid values, so an adversary who
5685 breaks into a node can't learn how many circuits or streams have
5689 Changes in version 0.0.2pre16 - 2003-12-14
5691 - Fixed a bug that made HUP trigger an assert
5692 - Fixed a bug where a circuit that immediately failed wasn't being
5693 counted as a failed circuit in counting retries.
5696 - Now we close the circuit when we get a truncated cell: otherwise we're
5697 open to an anonymity attack where a bad node in the path truncates
5698 the circuit and then we open streams at him.
5699 - Add port ranges to exit policies
5700 - Add a conservative default exit policy
5701 - Warn if you're running tor as root
5702 - on HUP, retry OR connections and close/rebind listeners
5703 - options.EntryNodes: try these nodes first when picking the first node
5704 - options.ExitNodes: if your best choices happen to include any of
5705 your preferred exit nodes, you choose among just those preferred
5707 - options.ExcludedNodes: nodes that are never picked in path building
5710 Changes in version 0.0.2pre15 - 2003-12-03
5711 o Robustness and bugfixes:
5712 - Sometimes clients would cache incorrect DNS resolves, which would
5713 really screw things up.
5714 - An OP that goes offline would slowly leak all its sockets and stop
5716 - A wide variety of bugfixes in exit node selection, exit policy
5717 handling, and processing pending streams when a new circuit is
5719 - Pick nodes for a path only from those the directory says are up
5720 - Choose randomly from all running dirservers, not always the first one
5721 - Increase allowed http header size for directory fetch.
5722 - Stop writing to stderr (if we're daemonized it will be closed).
5723 - Enable -g always, so cores will be more useful to me.
5724 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
5727 - Wrote a man page. It lists commonly used options.
5730 - Change default loglevel to warn.
5731 - Make PidFile default to null rather than littering in your CWD.
5732 - OnionRouter config option is now obsolete. Instead it just checks
5734 - Moved to a single unified torrc file for both clients and servers.
5737 Changes in version 0.0.2pre14 - 2003-11-29
5738 o Robustness and bugfixes:
5739 - Force the admin to make the DataDirectory himself
5740 - to get ownership/permissions right
5741 - so clients no longer make a DataDirectory and then never use it
5742 - fix bug where a client who was offline for 45 minutes would never
5743 pull down a directory again
5744 - fix (or at least hide really well) the dns assert bug that was
5745 causing server crashes
5746 - warnings and improved robustness wrt clockskew for certs
5747 - use the native daemon(3) to daemonize, when available
5748 - exit if bind() fails
5749 - exit if neither socksport nor orport is defined
5750 - include our own tor_timegm (Win32 doesn't have its own)
5751 - bugfix for win32 with lots of connections
5752 - fix minor bias in PRNG
5753 - make dirserver more robust to corrupt cached directory
5756 - Wrote the design document (woo)
5758 o Circuit building and exit policies:
5759 - Circuits no longer try to use nodes that the directory has told them
5761 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
5762 bitcounts (18.0.0.0/8).
5763 - Make AP connections standby for a circuit if no suitable circuit
5764 exists, rather than failing
5765 - Circuits choose exit node based on addr/port, exit policies, and
5766 which AP connections are standing by
5767 - Bump min pathlen from 2 to 3
5768 - Relay end cells have a payload to describe why the stream ended.
5769 - If the stream failed because of exit policy, try again with a new
5771 - Clients have a dns cache to remember resolved addresses.
5772 - Notice more quickly when we have no working circuits
5775 - APPort is now called SocksPort
5776 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
5778 - RecommendedVersions is now a config variable rather than
5779 hardcoded (for dirservers)
5780 - Reloads config on HUP
5781 - Usage info on -h or --help
5782 - If you set User and Group config vars, it'll setu/gid to them.
5784 Changes in version 0.0.2pre13 - 2003-10-19
5785 o General stability:
5786 - SSL_write no longer fails when it returns WANTWRITE and the number
5787 of bytes in the buf has changed by the next SSL_write call.
5788 - Fix segfault fetching directory when network is down
5789 - Fix a variety of minor memory leaks
5790 - Dirservers reload the fingerprints file on HUP, so I don't have
5791 to take down the network when I approve a new router
5792 - Default server config file has explicit Address line to specify fqdn
5795 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
5796 - Make listener connections not ever alloc bufs
5798 o Autoconf improvements:
5799 - don't clobber an external CFLAGS in ./configure
5800 - Make install now works
5801 - create var/lib/tor on make install
5802 - autocreate a tor.sh initscript to help distribs
5803 - autocreate the torrc and sample-server-torrc with correct paths
5805 o Log files and Daemonizing now work:
5806 - If --DebugLogFile is specified, log to it at -l debug
5807 - If --LogFile is specified, use it instead of commandline
5808 - If --RunAsDaemon is set, tor forks and backgrounds on startup