1 Changes in version 0.2.1.13-????? - 2009-0?-??
3 - Automatically detect MacOSX versions earlier than 10.4.0, and
4 disable kqueue from inside Tor when running with these versions.
5 We previously did this from the startup script, but that was no
6 help to people who didn't use the startup script. Resolves
8 - When we had picked an exit node for a connection, but marked it as
9 "optional", and it turned out we had no onion key for the exit,
10 stop preferring the exit and try again. This situation may not be
11 possible now, but will probably become feasible with proposal 158.
12 Spotted by rovv. Fixes another case of bug 752.
13 - Don't re-extend introduction circuits if we ran out of RELAY_EARLY
14 cells. Bugfix on 0.2.1.3-alpha. Fixes more of bug 878.
15 - As an exit node, scrub the IP address to which we are exiting in the
16 logs. Bugfix on 0.2.1.8-alpha.
19 - On Linux, use the prctl call to re-enable core dumps when the user
23 Changes in version 0.2.1.12-alpha - 2009-02-08
25 - Fix an infinite-loop bug on handling corrupt votes under certain
26 circumstances. Bugfix on 0.2.0.8-alpha.
27 - Fix a temporary DoS vulnerability that could be performed by
28 a directory mirror. Bugfix on 0.2.0.9-alpha; reported by lark.
29 - Avoid a potential crash on exit nodes when processing malformed
30 input. Remote DoS opportunity. Bugfix on 0.2.1.7-alpha.
33 - Let controllers actually ask for the "clients_seen" event for
34 getting usage summaries on bridge relays. Bugfix on 0.2.1.10-alpha;
35 reported by Matt Edman.
36 - Fix a compile warning on OSX Panther. Fixes bug 913; bugfix against
38 - Fix a bug in address parsing that was preventing bridges or hidden
39 service targets from being at IPv6 addresses.
40 - Solve a bug that kept hardware crypto acceleration from getting
41 enabled when accounting was turned on. Fixes bug 907. Bugfix on
43 - Remove a bash-ism from configure.in to build properly on non-Linux
44 platforms. Bugfix on 0.2.1.1-alpha.
45 - Fix code so authorities _actually_ send back X-Descriptor-Not-New
46 headers. Bugfix on 0.2.0.10-alpha.
47 - Don't consider expiring already-closed client connections. Fixes
48 bug 893. Bugfix on 0.0.2pre20.
49 - Fix another interesting corner-case of bug 891 spotted by rovv:
50 Previously, if two hosts had different amounts of clock drift, and
51 one of them created a new connection with just the wrong timing,
52 the other might decide to deprecate the new connection erroneously.
53 Bugfix on 0.1.1.13-alpha.
54 - Resolve a very rare crash bug that could occur when the user forced
55 a nameserver reconfiguration during the middle of a nameserver
56 probe. Fixes bug 526. Bugfix on 0.1.2.1-alpha.
57 - Support changing value of ServerDNSRandomizeCase during SIGHUP.
58 Bugfix on 0.2.1.7-alpha.
59 - If we're using bridges and our network goes away, be more willing
60 to forgive our bridges and try again when we get an application
61 request. Bugfix on 0.2.0.x.
64 - Support platforms where time_t is 64 bits long. (Congratulations,
65 NetBSD!) Patch from Matthias Drochner.
66 - Add a 'getinfo status/clients-seen' controller command, in case
67 controllers want to hear clients_seen events but connect late.
70 - Disable GCC's strict alias optimization by default, to avoid the
71 likelihood of its introducing subtle bugs whenever our code violates
72 the letter of C99's alias rules.
75 Changes in version 0.2.1.11-alpha - 2009-01-20
77 - Fix a heap-corruption bug that may be remotely triggerable on
78 some platforms. Reported by Ilja van Sprundel.
81 - Discard router descriptors as we load them if they are more than
82 five days old. Otherwise if Tor is off for a long time and then
83 starts with cached descriptors, it will try to use the onion
84 keys in those obsolete descriptors when building circuits. Bugfix
85 on 0.2.0.x. Fixes bug 887.
88 - Try to make sure that the version of Libevent we're running with
89 is binary-compatible with the one we built with. May address bug
91 - Make setting ServerDNSRandomizeCase to 0 actually work. Bugfix
92 for bug 905. Bugfix on 0.2.1.7-alpha.
93 - Add a new --enable-local-appdata configuration switch to change
94 the default location of the datadir on win32 from APPDATA to
95 LOCAL_APPDATA. In the future, we should migrate to LOCAL_APPDATA
96 entirely. Patch from coderman.
99 - Make outbound DNS packets respect the OutboundBindAddress setting.
100 Fixes the bug part of bug 798. Bugfix on 0.1.2.2-alpha.
101 - When our circuit fails at the first hop (e.g. we get a destroy
102 cell back), avoid using that OR connection anymore, and also
103 tell all the one-hop directory requests waiting for it that they
104 should fail. Bugfix on 0.2.1.3-alpha.
105 - In the torify(1) manpage, mention that tsocks will leak your
109 Changes in version 0.2.1.10-alpha - 2009-01-06
111 - If the cached networkstatus consensus is more than five days old,
112 discard it rather than trying to use it. In theory it could
113 be useful because it lists alternate directory mirrors, but in
114 practice it just means we spend many minutes trying directory
115 mirrors that are long gone from the network. Helps bug 887 a bit;
117 - Bridge relays that had DirPort set to 0 would stop fetching
118 descriptors shortly after startup, and then briefly resume
119 after a new bandwidth test and/or after publishing a new bridge
120 descriptor. Bridge users that try to bootstrap from them would
121 get a recent networkstatus but would get descriptors from up to
122 18 hours earlier, meaning most of the descriptors were obsolete
123 already. Reported by Tas; bugfix on 0.2.0.13-alpha.
124 - Prevent bridge relays from serving their 'extrainfo' document
125 to anybody who asks, now that extrainfo docs include potentially
126 sensitive aggregated client geoip summaries. Bugfix on
130 - New controller event "clients_seen" to report a geoip-based summary
131 of which countries we've seen clients from recently. Now controllers
132 like Vidalia can show bridge operators that they're actually making
134 - Build correctly against versions of OpenSSL 0.9.8 or later built
135 without support for deprecated functions.
136 - Update to the "December 19 2008" ip-to-country file.
138 o Minor bugfixes (on 0.2.0.x):
139 - Authorities now vote for the Stable flag for any router whose
140 weighted MTBF is at least 5 days, regardless of the mean MTBF.
141 - Do not remove routers as too old if we do not have any consensus
142 document. Bugfix on 0.2.0.7-alpha.
143 - Do not accept incomplete ipv4 addresses (like 192.168.0) as valid.
144 Spec conformance issue. Bugfix on Tor 0.0.2pre27.
145 - When an exit relay resolves a stream address to a local IP address,
146 do not just keep retrying that same exit relay over and
147 over. Instead, just close the stream. Addresses bug 872. Bugfix
148 on 0.2.0.32. Patch from rovv.
149 - If a hidden service sends us an END cell, do not consider
150 retrying the connection; just close it. Patch from rovv.
151 - When we made bridge authorities stop serving bridge descriptors over
152 unencrypted links, we also broke DirPort reachability testing for
153 bridges. So bridges with a non-zero DirPort were printing spurious
154 warns to their logs. Bugfix on 0.2.0.16-alpha. Fixes bug 709.
155 - When a relay gets a create cell it can't decrypt (e.g. because it's
156 using the wrong onion key), we were dropping it and letting the
157 client time out. Now actually answer with a destroy cell. Fixes
158 bug 904. Bugfix on 0.0.2pre8.
159 - Squeeze 2-5% out of client performance (according to oprofile) by
160 improving the implementation of some policy-manipulation functions.
162 o Minor bugfixes (on 0.2.1.x):
163 - Make get_interface_address() function work properly again; stop
164 guessing the wrong parts of our address as our address.
165 - Do not cannibalize a circuit if we're out of RELAY_EARLY cells to
166 send on that circuit. Otherwise we might violate the proposal-110
167 limit. Bugfix on 0.2.1.3-alpha. Partial fix for bug 878. Diagnosis
169 - When we're sending non-EXTEND cells to the first hop in a circuit,
170 for example to use an encrypted directory connection, we don't need
171 to use RELAY_EARLY cells: the first hop knows what kind of cell
172 it is, and nobody else can even see the cell type. Conserving
173 RELAY_EARLY cells makes it easier to cannibalize circuits like
175 - Stop logging nameserver addresses in reverse order.
176 - If we are retrying a directory download slowly over and over, do
177 not automatically give up after the 254th failure. Bugfix on
179 - Resume reporting accurate "stream end" reasons to the local control
180 port. They were lost in the changes for Proposal 148. Bugfix on
183 o Deprecated and removed features:
184 - The old "tor --version --version" command, which would print out
185 the subversion "Id" of most of the source files, is now removed. It
186 turned out to be less useful than we'd expected, and harder to
189 o Code simplifications and refactoring:
190 - Change our header file guard macros to be less likely to conflict
191 with system headers. Adam Langley noticed that we were conflicting
192 with log.h on Android.
193 - Tool-assisted documentation cleanup. Nearly every function or
194 static variable in Tor should have its own documentation now.
197 Changes in version 0.2.1.9-alpha - 2008-12-25
198 Tor 0.2.1.9-alpha fixes many more bugs, some of them security-related.
200 o New directory authorities:
201 - gabelmoo (the authority run by Karsten Loesing) now has a new
205 - Never use a connection with a mismatched address to extend a
206 circuit, unless that connection is canonical. A canonical
207 connection is one whose address is authenticated by the router's
208 identity key, either in a NETINFO cell or in a router descriptor.
209 - Avoid a possible memory corruption bug when receiving hidden service
210 descriptors. Bugfix on 0.2.1.6-alpha.
213 - Fix a logic error that would automatically reject all but the first
214 configured DNS server. Bugfix on 0.2.1.5-alpha. Possible fix for
215 part of bug 813/868. Bug spotted by coderman.
216 - When a stream at an exit relay is in state "resolving" or
217 "connecting" and it receives an "end" relay cell, the exit relay
218 would silently ignore the end cell and not close the stream. If
219 the client never closes the circuit, then the exit relay never
220 closes the TCP connection. Bug introduced in 0.1.2.1-alpha;
222 - When we can't initialize DNS because the network is down, do not
223 automatically stop Tor from starting. Instead, retry failed
224 dns_init() every 10 minutes, and change the exit policy to reject
225 *:* until one succeeds. Fixes bug 691.
228 - Give a better error message when an overzealous init script says
229 "sudo -u username tor --user username". Makes Bug 882 easier for
231 - When a directory authority gives us a new guess for our IP address,
232 log which authority we used. Hopefully this will help us debug
233 the recent complaints about bad IP address guesses.
234 - Detect svn revision properly when we're using git-svn.
235 - Try not to open more than one descriptor-downloading connection
236 to an authority at once. This should reduce load on directory
237 authorities. Fixes bug 366.
238 - Add cross-certification to newly generated certificates, so that
239 a signing key is enough information to look up a certificate.
240 Partial implementation of proposal 157.
241 - Start serving certificates by <identity digest, signing key digest>
242 pairs. Partial implementation of proposal 157.
243 - Clients now never report any stream end reason except 'MISC'.
244 Implements proposal 148.
245 - On platforms with a maximum syslog string length, truncate syslog
246 messages to that length ourselves, rather than relying on the
247 system to do it for us.
248 - Optimize out calls to time(NULL) that occur for every IO operation,
249 or for every cell. On systems where time() is a slow syscall,
250 this fix will be slightly helpful.
251 - Exit servers can now answer resolve requests for ip6.arpa addresses.
252 - When we download a descriptor that we then immediately (as
253 a directory authority) reject, do not retry downloading it right
254 away. Should save some bandwidth on authorities. Fix for bug
255 888. Patch by Sebastian Hahn.
256 - When a download gets us zero good descriptors, do not notify
257 Tor that new directory information has arrived.
258 - Avoid some nasty corner cases in the logic for marking connections
259 as too old or obsolete or noncanonical for circuits. Partial
262 o Minor features (controller):
263 - New CONSENSUS_ARRIVED event to note when a new consensus has
264 been fetched and validated.
265 - When we realize that another process has modified our cached
266 descriptors file, print out a more useful error message rather
267 than triggering an assertion. Fixes bug 885. Patch from Karsten.
268 - Add an internal-use-only __ReloadTorrcOnSIGHUP option for
269 controllers to prevent SIGHUP from reloading the
270 configuration. Fixes bug 856.
273 - Resume using the correct "REASON=" stream when telling the
274 controller why we closed a stream. Bugfix in 0.2.1.1-alpha.
275 - When a canonical connection appears later in our internal list
276 than a noncanonical one for a given OR ID, always use the
277 canonical one. Bugfix on 0.2.0.12-alpha. Fixes bug 805.
279 - Clip the MaxCircuitDirtiness config option to a minimum of 10
280 seconds. Warn the user if lower values are given in the
281 configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
282 - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
283 user if lower values are given in the configuration. Bugfix on
284 0.1.1.17-rc. Patch by Sebastian.
285 - Fix a race condition when freeing keys shared between main thread
286 and CPU workers that could result in a memory leak. Bugfix on
287 0.1.0.1-rc. Fixes bug 889.
289 o Minor bugfixes (hidden services):
290 - Do not throw away existing introduction points on SIGHUP (bugfix on
291 0.0.6pre1); also, do not stall hidden services because we're
292 throwing away introduction points; bugfix on 0.2.1.7-alpha. Spotted
293 by John Brooks. Patch by Karsten. Fixes bug 874.
294 - Fix a memory leak when we decline to add a v2 rendezvous
295 descriptor to the cache because we already had a v0 descriptor
296 with the same ID. Bugfix on 0.2.0.18-alpha.
298 o Deprecated and removed features:
299 - RedirectExits has been removed. It was deprecated since
301 - Finally remove deprecated "EXTENDED_FORMAT" controller feature. It
302 has been called EXTENDED_EVENTS since 0.1.2.4-alpha.
303 - Cell pools are now always enabled; --disable-cell-pools is ignored.
305 o Code simplifications and refactoring:
306 - Rename the confusing or_is_obsolete field to the more appropriate
307 is_bad_for_new_circs, and move it to or_connection_t where it
309 - Move edge-only flags from connection_t to edge_connection_t: not
310 only is this better coding, but on machines of plausible alignment,
311 it should save 4-8 bytes per connection_t. "Every little bit helps."
312 - Rename ServerDNSAllowBrokenResolvConf to ServerDNSAllowBrokenConfig
313 for consistency; keep old option working for backward compatibility.
314 - Simplify the code for finding connections to use for a circuit.
317 Changes in version 0.2.1.8-alpha - 2008-12-08
318 Tor 0.2.1.8-alpha fixes some crash bugs in earlier alpha releases,
319 builds better on unusual platforms like Solaris and old OS X, and
320 fixes a variety of other issues.
323 - New DirPortFrontPage option that takes an html file and publishes
324 it as "/" on the DirPort. Now relay operators can provide a
325 disclaimer without needing to set up a separate webserver. There's
326 a sample disclaimer in contrib/tor-exit-notice.html.
329 - When the client is choosing entry guards, now it selects at most
330 one guard from a given relay family. Otherwise we could end up with
331 all of our entry points into the network run by the same operator.
332 Suggested by Camilo Viecco. Fix on 0.1.1.11-alpha.
335 - Fix a DOS opportunity during the voting signature collection process
336 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
337 - Fix a possible segfault when establishing an exit connection. Bugfix
341 - Get file locking working on win32. Bugfix on 0.2.1.6-alpha. Fixes
343 - Made Tor a little less aggressive about deleting expired
344 certificates. Partial fix for bug 854.
345 - Stop doing unaligned memory access that generated bus errors on
346 sparc64. Bugfix on 0.2.0.10-alpha. Fix for bug 862.
347 - Fix a crash bug when changing EntryNodes from the controller. Bugfix
348 on 0.2.1.6-alpha. Fix for bug 867. Patched by Sebastian.
349 - Make USR2 log-level switch take effect immediately. Bugfix on
351 - If one win32 nameserver fails to get added, continue adding the
352 rest, and don't automatically fail.
353 - Use fcntl() for locking when flock() is not available. Should fix
354 compilation on Solaris. Should fix Bug 873. Bugfix on 0.2.1.6-alpha.
355 - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
356 could make gcc generate non-functional binary search code. Bugfix
358 - Build correctly on platforms without socklen_t.
359 - Avoid potential crash on internal error during signature collection.
360 Fixes bug 864. Patch from rovv.
361 - Do not use C's stdio library for writing to log files. This will
362 improve logging performance by a minute amount, and will stop
363 leaking fds when our disk is full. Fixes bug 861.
364 - Stop erroneous use of O_APPEND in cases where we did not in fact
365 want to re-seek to the end of a file before every last write().
366 - Correct handling of possible malformed authority signing key
367 certificates with internal signature types. Fixes bug 880. Bugfix
369 - Fix a hard-to-trigger resource leak when logging credential status.
373 - Directory mirrors no longer fetch the v1 directory or
374 running-routers files. They are obsolete, and nobody asks for them
375 anymore. This is the first step to making v1 authorities obsolete.
377 o Minor features (controller):
378 - Return circuit purposes in response to GETINFO circuit-status. Fixes
382 Changes in version 0.2.0.32 - 2008-11-20
383 Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
384 packages (and maybe other packages) noticed by Theo de Raadt, fixes
385 a smaller security flaw that might allow an attacker to access local
386 services, further improves hidden service performance, and fixes a
387 variety of other issues.
390 - The "User" and "Group" config options did not clear the
391 supplementary group entries for the Tor process. The "User" option
392 is now more robust, and we now set the groups to the specified
393 user's primary group. The "Group" option is now ignored. For more
394 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
395 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
396 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848 and 857.
397 - The "ClientDNSRejectInternalAddresses" config option wasn't being
398 consistently obeyed: if an exit relay refuses a stream because its
399 exit policy doesn't allow it, we would remember what IP address
400 the relay said the destination address resolves to, even if it's
401 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
404 - Fix a DOS opportunity during the voting signature collection process
405 at directory authorities. Spotted by rovv. Bugfix on 0.2.0.x.
407 o Major bugfixes (hidden services):
408 - When fetching v0 and v2 rendezvous service descriptors in parallel,
409 we were failing the whole hidden service request when the v0
410 descriptor fetch fails, even if the v2 fetch is still pending and
411 might succeed. Similarly, if the last v2 fetch fails, we were
412 failing the whole hidden service request even if a v0 fetch is
413 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
414 - When extending a circuit to a hidden service directory to upload a
415 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
416 requests failed, because the router descriptor has not been
417 downloaded yet. In these cases, do not attempt to upload the
418 rendezvous descriptor, but wait until the router descriptor is
419 downloaded and retry. Likewise, do not attempt to fetch a rendezvous
420 descriptor from a hidden service directory for which the router
421 descriptor has not yet been downloaded. Fixes bug 767. Bugfix
425 - Fix several infrequent memory leaks spotted by Coverity.
426 - When testing for libevent functions, set the LDFLAGS variable
427 correctly. Found by Riastradh.
428 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
429 bootstrapping with tunneled directory connections. Bugfix on
430 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
431 - When asked to connect to A.B.exit:80, if we don't know the IP for A
432 and we know that server B rejects most-but-not all connections to
433 port 80, we would previously reject the connection. Now, we assume
434 the user knows what they were asking for. Fixes bug 752. Bugfix
435 on 0.0.9rc5. Diagnosed by BarkerJr.
436 - If we overrun our per-second write limits a little, count this as
437 having used up our write allocation for the second, and choke
438 outgoing directory writes. Previously, we had only counted this when
439 we had met our limits precisely. Fixes bug 824. Patch from by rovv.
440 Bugfix on 0.2.0.x (??).
441 - Remove the old v2 directory authority 'lefkada' from the default
442 list. It has been gone for many months.
443 - Stop doing unaligned memory access that generated bus errors on
444 sparc64. Bugfix on 0.2.0.10-alpha. Fixes bug 862.
445 - Make USR2 log-level switch take effect immediately. Bugfix on
448 o Minor bugfixes (controller):
449 - Make DNS resolved events into "CLOSED", not "FAILED". Bugfix on
450 0.1.2.5-alpha. Fix by Robert Hogan. Resolves bug 807.
453 Changes in version 0.2.1.7-alpha - 2008-11-08
454 Tor 0.2.1.7-alpha fixes a major security problem in Debian and Ubuntu
455 packages (and maybe other packages) noticed by Theo de Raadt, fixes
456 a smaller security flaw that might allow an attacker to access local
457 services, adds better defense against DNS poisoning attacks on exit
458 relays, further improves hidden service performance, and fixes a
459 variety of other issues.
462 - The "ClientDNSRejectInternalAddresses" config option wasn't being
463 consistently obeyed: if an exit relay refuses a stream because its
464 exit policy doesn't allow it, we would remember what IP address
465 the relay said the destination address resolves to, even if it's
466 an internal IP address. Bugfix on 0.2.0.7-alpha; patch by rovv.
467 - The "User" and "Group" config options did not clear the
468 supplementary group entries for the Tor process. The "User" option
469 is now more robust, and we now set the groups to the specified
470 user's primary group. The "Group" option is now ignored. For more
471 detailed logging on credential switching, set CREDENTIAL_LOG_LEVEL
472 in common/compat.c to LOG_NOTICE or higher. Patch by Jacob Appelbaum
473 and Steven Murdoch. Bugfix on 0.0.2pre14. Fixes bug 848.
474 - Do not use or believe expired v3 authority certificates. Patch
475 from Karsten. Bugfix in 0.2.0.x. Fixes bug 851.
478 - Now NodeFamily and MyFamily config options allow spaces in
479 identity fingerprints, so it's easier to paste them in.
480 Suggested by Lucky Green.
481 - Implement the 0x20 hack to better resist DNS poisoning: set the
482 case on outgoing DNS requests randomly, and reject responses that do
483 not match the case correctly. This logic can be disabled with the
484 ServerDNSRandomizeCase setting, if you are using one of the 0.3%
485 of servers that do not reliably preserve case in replies. See
486 "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
488 - Preserve case in replies to DNSPort requests in order to support
489 the 0x20 hack for resisting DNS poisoning attacks.
491 o Hidden service performance improvements:
492 - When the client launches an introduction circuit, retry with a
493 new circuit after 30 seconds rather than 60 seconds.
494 - Launch a second client-side introduction circuit in parallel
495 after a delay of 15 seconds (based on work by Christian Wilms).
496 - Hidden services start out building five intro circuits rather
497 than three, and when the first three finish they publish a service
498 descriptor using those. Now we publish our service descriptor much
499 faster after restart.
502 - Minor fix in the warning messages when you're having problems
503 bootstrapping; also, be more forgiving of bootstrap problems when
504 we're still making incremental progress on a given bootstrap phase.
505 - When we're choosing an exit node for a circuit, and we have
506 no pending streams, choose a good general exit rather than one that
507 supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
508 - Send a valid END cell back when a client tries to connect to a
509 nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
510 840. Patch from rovv.
511 - If a broken client asks a non-exit router to connect somewhere,
512 do not even do the DNS lookup before rejecting the connection.
513 Fixes another case of bug 619. Patch from rovv.
514 - Fix another case of assuming, when a specific exit is requested,
515 that we know more than the user about what hosts it allows.
516 Fixes another case of bug 752. Patch from rovv.
517 - Check which hops rendezvous stream cells are associated with to
518 prevent possible guess-the-streamid injection attacks from
519 intermediate hops. Fixes another case of bug 446. Based on patch
521 - Avoid using a negative right-shift when comparing 32-bit
522 addresses. Possible fix for bug 845 and bug 811.
523 - Make the assert_circuit_ok() function work correctly on circuits that
524 have already been marked for close.
525 - Fix read-off-the-end-of-string error in unit tests when decoding
527 - Fix uninitialized size field for memory area allocation: may improve
528 memory performance during directory parsing.
529 - Treat duplicate certificate fetches as failures, so that we do
530 not try to re-fetch an expired certificate over and over and over.
531 - Do not say we're fetching a certificate when we'll in fact skip it
532 because of a pending download.
535 Changes in version 0.2.1.6-alpha - 2008-09-30
536 Tor 0.2.1.6-alpha further improves performance and robustness of
537 hidden services, starts work on supporting per-country relay selection,
538 and fixes a variety of smaller issues.
541 - Implement proposal 121: make it possible to build hidden services
542 that only certain clients are allowed to connect to. This is
543 enforced at several points, so that unauthorized clients are unable
544 to send INTRODUCE cells to the service, or even (depending on the
545 type of authentication) to learn introduction points. This feature
546 raises the bar for certain kinds of active attacks against hidden
547 services. Code by Karsten Loesing.
548 - Relays now store and serve v2 hidden service descriptors by default,
549 i.e., the new default value for HidServDirectoryV2 is 1. This is
550 the last step in proposal 114, which aims to make hidden service
551 lookups more reliable.
552 - Start work to allow node restrictions to include country codes. The
553 syntax to exclude nodes in a country with country code XX is
554 "ExcludeNodes {XX}". Patch from Robert Hogan. It still needs some
555 refinement to decide what config options should take priority if
556 you ask to both use a particular node and exclude it.
557 - Allow ExitNodes list to include IP ranges and country codes, just
558 like the Exclude*Nodes lists. Patch from Robert Hogan.
561 - Fix a bug when parsing ports in tor_addr_port_parse() that caused
562 Tor to fail to start if you had it configured to use a bridge
563 relay. Fixes bug 809. Bugfix on 0.2.1.5-alpha.
564 - When extending a circuit to a hidden service directory to upload a
565 rendezvous descriptor using a BEGIN_DIR cell, almost 1/6 of all
566 requests failed, because the router descriptor had not been
567 downloaded yet. In these cases, we now wait until the router
568 descriptor is downloaded, and then retry. Likewise, clients
569 now skip over a hidden service directory if they don't yet have
570 its router descriptor, rather than futilely requesting it and
571 putting mysterious complaints in the logs. Fixes bug 767. Bugfix
573 - When fetching v0 and v2 rendezvous service descriptors in parallel,
574 we were failing the whole hidden service request when the v0
575 descriptor fetch fails, even if the v2 fetch is still pending and
576 might succeed. Similarly, if the last v2 fetch fails, we were
577 failing the whole hidden service request even if a v0 fetch is
578 still pending. Fixes bug 814. Bugfix on 0.2.0.10-alpha.
579 - DNS replies need to have names matching their requests, but
580 these names should be in the questions section, not necessarily
581 in the answers section. Fixes bug 823. Bugfix on 0.2.1.5-alpha.
584 - Update to the "September 1 2008" ip-to-country file.
585 - Allow ports 465 and 587 in the default exit policy again. We had
586 rejected them in 0.1.0.15, because back in 2005 they were commonly
587 misconfigured and ended up as spam targets. We hear they are better
588 locked down these days.
589 - Use a lockfile to make sure that two Tor processes are not
590 simultaneously running with the same datadir.
591 - Serve the latest v3 networkstatus consensus via the control
592 port. Use "getinfo dir/status-vote/current/consensus" to fetch it.
593 - Better logging about stability/reliability calculations on directory
595 - Drop the requirement to have an open dir port for storing and
596 serving v2 hidden service descriptors.
597 - Directory authorities now serve a /tor/dbg-stability.txt URL to
598 help debug WFU and MTBF calculations.
599 - Implement most of Proposal 152: allow specialized servers to permit
600 single-hop circuits, and clients to use those servers to build
601 single-hop circuits when using a specialized controller. Patch
602 from Josh Albrecht. Resolves feature request 768.
603 - Add a -p option to tor-resolve for specifying the SOCKS port: some
604 people find host:port too confusing.
605 - Make TrackHostExit mappings expire a while after their last use, not
606 after their creation. Patch from Robert Hogan.
607 - Provide circuit purposes along with circuit events to the controller.
610 - Fix compile on OpenBSD 4.4-current. Bugfix on 0.2.1.5-alpha.
612 - Fixed some memory leaks -- some quite frequent, some almost
613 impossible to trigger -- based on results from Coverity.
614 - When testing for libevent functions, set the LDFLAGS variable
615 correctly. Found by Riastradh.
616 - Fix an assertion bug in parsing policy-related options; possible fix
618 - Catch and report a few more bootstrapping failure cases when Tor
619 fails to establish a TCP connection. Cleanup on 0.2.1.x.
620 - Avoid a bug where the FastFirstHopPK 0 option would keep Tor from
621 bootstrapping with tunneled directory connections. Bugfix on
622 0.1.2.5-alpha. Fixes bug 797. Found by Erwin Lam.
623 - When asked to connect to A.B.exit:80, if we don't know the IP for A
624 and we know that server B rejects most-but-not all connections to
625 port 80, we would previously reject the connection. Now, we assume
626 the user knows what they were asking for. Fixes bug 752. Bugfix
627 on 0.0.9rc5. Diagnosed by BarkerJr.
628 - If we are not using BEGIN_DIR cells, don't attempt to contact hidden
629 service directories if they have no advertised dir port. Bugfix
631 - If we overrun our per-second write limits a little, count this as
632 having used up our write allocation for the second, and choke
633 outgoing directory writes. Previously, we had only counted this when
634 we had met our limits precisely. Fixes bug 824. Patch by rovv.
635 Bugfix on 0.2.0.x (??).
636 - Avoid a "0 divided by 0" calculation when calculating router uptime
637 at directory authorities. Bugfix on 0.2.0.8-alpha.
638 - Make DNS resolved controller events into "CLOSED", not
639 "FAILED". Bugfix on 0.1.2.5-alpha. Fix by Robert Hogan. Resolves
641 - Fix a bug where an unreachable relay would establish enough
642 reachability testing circuits to do a bandwidth test -- if
643 we already have a connection to the middle hop of the testing
644 circuit, then it could establish the last hop by using the existing
645 connection. Bugfix on 0.1.2.2-alpha, exposed when we made testing
646 circuits no longer use entry guards in 0.2.1.3-alpha.
647 - If we have correct permissions on $datadir, we complain to stdout
648 and fail to start. But dangerous permissions on
649 $datadir/cached-status/ would cause us to open a log and complain
650 there. Now complain to stdout and fail to start in both cases. Fixes
651 bug 820, reported by seeess.
652 - Remove the old v2 directory authority 'lefkada' from the default
653 list. It has been gone for many months.
655 o Code simplifications and refactoring:
656 - Revise the connection_new functions so that a more typesafe variant
657 exists. This will work better with Coverity, and let us find any
658 actual mistakes we're making here.
659 - Refactor unit testing logic so that dmalloc can be used sensibly
660 with unit tests to check for memory leaks.
661 - Move all hidden-service related fields from connection and circuit
662 structure to substructures: this way they won't eat so much memory.
665 Changes in version 0.2.0.31 - 2008-09-03
666 Tor 0.2.0.31 addresses two potential anonymity issues, starts to fix
667 a big bug we're seeing where in rare cases traffic from one Tor stream
668 gets mixed into another stream, and fixes a variety of smaller issues.
671 - Make sure that two circuits can never exist on the same connection
672 with the same circuit ID, even if one is marked for close. This
673 is conceivably a bugfix for bug 779. Bugfix on 0.1.0.4-rc.
674 - Relays now reject risky extend cells: if the extend cell includes
675 a digest of all zeroes, or asks to extend back to the relay that
676 sent the extend cell, tear down the circuit. Ideas suggested
678 - If not enough of our entry guards are available so we add a new
679 one, we might use the new one even if it overlapped with the
680 current circuit's exit relay (or its family). Anonymity bugfix
684 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
685 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
686 - Correctly detect the presence of the linux/netfilter_ipv4.h header
687 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
688 - Pick size of default geoip filename string correctly on windows.
689 Fixes bug 806. Bugfix on 0.2.0.30.
690 - Make the autoconf script accept the obsolete --with-ssl-dir
691 option as an alias for the actually-working --with-openssl-dir
692 option. Fix the help documentation to recommend --with-openssl-dir.
693 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
694 - Disallow session resumption attempts during the renegotiation
695 stage of the v2 handshake protocol. Clients should never be trying
696 session resumption at this point, but apparently some did, in
697 ways that caused the handshake to fail. Bug found by Geoff Goodell.
698 Bugfix on 0.2.0.20-rc.
699 - When using the TransPort option on OpenBSD, and using the User
700 option to change UID and drop privileges, make sure to open
701 /dev/pf before dropping privileges. Fixes bug 782. Patch from
702 Christopher Davis. Bugfix on 0.1.2.1-alpha.
703 - Try to attach connections immediately upon receiving a RENDEZVOUS2
704 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
705 on the client side when connecting to a hidden service. Bugfix
706 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
707 - When closing an application-side connection because its circuit is
708 getting torn down, generate the stream event correctly. Bugfix on
709 0.1.2.x. Anonymous patch.
712 Changes in version 0.2.1.5-alpha - 2008-08-31
713 Tor 0.2.1.5-alpha moves us closer to handling IPv6 destinations, puts
714 in a lot of the infrastructure for adding authorization to hidden
715 services, lays the groundwork for having clients read their load
716 balancing information out of the networkstatus consensus rather than
717 the individual router descriptors, addresses two potential anonymity
718 issues, and fixes a variety of smaller issues.
721 - Convert many internal address representations to optionally hold
723 - Generate and accept IPv6 addresses in many protocol elements.
724 - Make resolver code handle nameservers located at ipv6 addresses.
725 - Begin implementation of proposal 121 ("Client authorization for
726 hidden services"): configure hidden services with client
727 authorization, publish descriptors for them, and configure
728 authorization data for hidden services at clients. The next
729 step is to actually access hidden services that perform client
731 - More progress toward proposal 141: Network status consensus
732 documents and votes now contain bandwidth information for each
733 router and a summary of that router's exit policy. Eventually this
734 will be used by clients so that they do not have to download every
735 known descriptor before building circuits.
737 o Major bugfixes (on 0.2.0.x and before):
738 - When sending CREATED cells back for a given circuit, use a 64-bit
739 connection ID to find the right connection, rather than an addr:port
740 combination. Now that we can have multiple OR connections between
741 the same ORs, it is no longer possible to use addr:port to uniquely
742 identify a connection.
743 - Relays now reject risky extend cells: if the extend cell includes
744 a digest of all zeroes, or asks to extend back to the relay that
745 sent the extend cell, tear down the circuit. Ideas suggested
747 - If not enough of our entry guards are available so we add a new
748 one, we might use the new one even if it overlapped with the
749 current circuit's exit relay (or its family). Anonymity bugfix
753 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
754 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
755 - When using the TransPort option on OpenBSD, and using the User
756 option to change UID and drop privileges, make sure to open /dev/pf
757 before dropping privileges. Fixes bug 782. Patch from Christopher
758 Davis. Bugfix on 0.1.2.1-alpha.
759 - Correctly detect the presence of the linux/netfilter_ipv4.h header
760 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
761 - Add a missing safe_str() call for a debug log message.
762 - Use 64 bits instead of 32 bits for connection identifiers used with
763 the controller protocol, to greatly reduce risk of identifier reuse.
764 - Make the autoconf script accept the obsolete --with-ssl-dir
765 option as an alias for the actually-working --with-openssl-dir
766 option. Fix the help documentation to recommend --with-openssl-dir.
767 Based on a patch by "Dave". Bugfix on 0.2.0.1-alpha.
770 - Rate-limit too-many-sockets messages: when they happen, they happen
771 a lot. Resolves bug 748.
772 - Resist DNS poisoning a little better by making sure that names in
773 answer sections match.
774 - Print the SOCKS5 error message string as well as the error code
775 when a tor-resolve request fails. Patch from Jacob.
778 Changes in version 0.2.1.4-alpha - 2008-08-04
779 Tor 0.2.1.4-alpha fixes a pair of crash bugs in 0.2.1.3-alpha.
782 - The address part of exit policies was not correctly written
783 to router descriptors. This generated router descriptors that failed
784 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
786 - Tor triggered a false assert when extending a circuit to a relay
787 but we already have a connection open to that relay. Noticed by
788 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
791 - Fix a hidden service logging bug: in some edge cases, the router
792 descriptor of a previously picked introduction point becomes
793 obsolete and we need to give up on it rather than continually
794 complaining that it has become obsolete. Observed by xiando. Bugfix
798 - Take out the TestVia config option, since it was a workaround for
799 a bug that was fixed in Tor 0.1.1.21.
802 Changes in version 0.2.1.3-alpha - 2008-08-03
803 Tor 0.2.1.3-alpha implements most of the pieces to prevent
804 infinite-length circuit attacks (see proposal 110); fixes a bug that
805 might cause exit relays to corrupt streams they send back; allows
806 address patterns (e.g. 255.128.0.0/16) to appear in ExcludeNodes and
807 ExcludeExitNodes config options; and fixes a big pile of bugs.
809 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
810 - Send a bootstrap problem "warn" event on the first problem if the
811 reason is NO_ROUTE (that is, our network is down).
814 - Implement most of proposal 110: The first K cells to be sent
815 along a circuit are marked as special "early" cells; only K "early"
816 cells will be allowed. Once this code is universal, we can block
817 certain kinds of DOS attack by requiring that EXTEND commands must
818 be sent using an "early" cell.
821 - Try to attach connections immediately upon receiving a RENDEZVOUS2
822 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
823 on the client side when connecting to a hidden service. Bugfix
824 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
825 - Ensure that two circuits can never exist on the same connection
826 with the same circuit ID, even if one is marked for close. This
827 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
830 - When relays do their initial bandwidth measurement, don't limit
831 to just our entry guards for the test circuits. Otherwise we tend
832 to have multiple test circuits going through a single entry guard,
833 which makes our bandwidth test less accurate. Fixes part of bug 654;
834 patch contributed by Josh Albrecht.
835 - Add an ExcludeExitNodes option so users can list a set of nodes
836 that should be be excluded from the exit node position, but
837 allowed elsewhere. Implements proposal 151.
838 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
839 ExcludeNodes and ExcludeExitNodes lists.
840 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
841 be more efficient. Formerly it was quadratic in the number of
842 servers; now it should be linear. Fixes bug 509.
843 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
844 and n_conn_id_digest fields into a separate structure that's
845 only needed when the circuit has not yet attached to an n_conn.
848 - Change the contrib/tor.logrotate script so it makes the new
849 logs as "_tor:_tor" rather than the default, which is generally
850 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
851 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
852 warnings (occasionally), but it can also cause the compiler to
853 eliminate error-checking code. Suggested by Peter Gutmann.
854 - When a hidden service is giving up on an introduction point candidate
855 that was not included in the last published rendezvous descriptor,
856 don't reschedule publication of the next descriptor. Fixes bug 763.
858 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
859 HiddenServiceExcludeNodes as obsolete: they never worked properly,
860 and nobody claims to be using them. Fixes bug 754. Bugfix on
861 0.1.0.1-rc. Patch from Christian Wilms.
862 - Fix a small alignment and memory-wasting bug on buffer chunks.
865 o Minor bugfixes (controller):
866 - When closing an application-side connection because its circuit
867 is getting torn down, generate the stream event correctly.
868 Bugfix on 0.1.2.x. Anonymous patch.
871 - Remove all backward-compatibility code to support relays running
872 versions of Tor so old that they no longer work at all on the
876 Changes in version 0.2.0.30 - 2008-07-15
878 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
879 warnings (occasionally), but it can also cause the compiler to
880 eliminate error-checking code. Suggested by Peter Gutmann.
883 Changes in version 0.2.0.29-rc - 2008-07-08
884 Tor 0.2.0.29-rc fixes two big bugs with using bridges, fixes more
885 hidden-service performance bugs, and fixes a bunch of smaller bugs.
888 - If you have more than one bridge but don't know their keys,
889 you would only launch a request for the descriptor of the first one
890 on your list. (Tor considered launching requests for the others, but
891 found that it already had a connection on the way for $0000...0000
892 so it didn't open another.) Bugfix on 0.2.0.x.
893 - If you have more than one bridge but don't know their keys, and the
894 connection to one of the bridges failed, you would cancel all
895 pending bridge connections. (After all, they all have the same
896 digest.) Bugfix on 0.2.0.x.
897 - When a hidden service was trying to establish an introduction point,
898 and Tor had built circuits preemptively for such purposes, we
899 were ignoring all the preemptive circuits and launching a new one
900 instead. Bugfix on 0.2.0.14-alpha.
901 - When a hidden service was trying to establish an introduction point,
902 and Tor *did* manage to reuse one of the preemptively built
903 circuits, it didn't correctly remember which one it used,
904 so it asked for another one soon after, until there were no
905 more preemptive circuits, at which point it launched one from
906 scratch. Bugfix on 0.0.9.x.
907 - Make directory servers include the X-Your-Address-Is: http header in
908 their responses even for begin_dir conns. Now clients who only
909 ever use begin_dir connections still have a way to learn their IP
910 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
913 - Fix a macro/CPP interaction that was confusing some compilers:
914 some GCCs don't like #if/#endif pairs inside macro arguments.
916 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
917 Fixes bug 704; fix from Steven Murdoch.
918 - When opening /dev/null in finish_daemonize(), do not pass the
919 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
920 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
921 - Correctly detect transparent proxy support on Linux hosts that
922 require in.h to be included before netfilter_ipv4.h. Patch
924 - Disallow session resumption attempts during the renegotiation
925 stage of the v2 handshake protocol. Clients should never be trying
926 session resumption at this point, but apparently some did, in
927 ways that caused the handshake to fail. Bugfix on 0.2.0.20-rc. Bug
928 found by Geoff Goodell.
931 Changes in version 0.2.1.2-alpha - 2008-06-20
932 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
933 make it easier to set up your own private Tor network; fixes several
934 big bugs with using more than one bridge relay; fixes a big bug with
935 offering hidden services quickly after Tor starts; and uses a better
936 API for reporting potential bootstrapping problems to the controller.
939 - New TestingTorNetwork config option to allow adjustment of
940 previously constant values that, while reasonable, could slow
941 bootstrapping. Implements proposal 135. Patch from Karsten.
944 - If you have more than one bridge but don't know their digests,
945 you would only learn a request for the descriptor of the first one
946 on your list. (Tor considered launching requests for the others, but
947 found that it already had a connection on the way for $0000...0000
948 so it didn't open another.) Bugfix on 0.2.0.x.
949 - If you have more than one bridge but don't know their digests,
950 and the connection to one of the bridges failed, you would cancel
951 all pending bridge connections. (After all, they all have the
952 same digest.) Bugfix on 0.2.0.x.
953 - When establishing a hidden service, introduction points that
954 originate from cannibalized circuits are completely ignored and not
955 included in rendezvous service descriptors. This might be another
956 reason for delay in making a hidden service available. Bugfix
957 from long ago (0.0.9.x?)
960 - Allow OpenSSL to use dynamic locks if it wants.
961 - When building a consensus, do not include routers that are down.
962 This will cut down 30% to 40% on consensus size. Implements
964 - In directory authorities' approved-routers files, allow
965 fingerprints with or without space.
966 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
967 controller can query our current bootstrap state in case it attaches
968 partway through and wants to catch up.
969 - Send an initial "Starting" bootstrap status event, so we have a
970 state to start out in.
973 - Asking for a conditional consensus at .../consensus/<fingerprints>
974 would crash a dirserver if it did not already have a
975 consensus. Bugfix on 0.2.1.1-alpha.
976 - Clean up some macro/CPP interactions: some GCC versions don't like
977 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
980 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
981 - Directory authorities shouldn't complain about bootstrapping
982 problems just because they do a lot of reachability testing and
983 some of the connection attempts fail.
984 - Start sending "count" and "recommendation" key/value pairs in
985 bootstrap problem status events, so the controller can hear about
986 problems even before Tor decides they're worth reporting for sure.
987 - If you're using bridges, generate "bootstrap problem" warnings
988 as soon as you run out of working bridges, rather than waiting
989 for ten failures -- which will never happen if you have less than
991 - If we close our OR connection because there's been a circuit
992 pending on it for too long, we were telling our bootstrap status
993 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
996 Changes in version 0.2.1.1-alpha - 2008-06-13
997 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
998 were making the Tor process bloat especially on Linux; makes our TLS
999 handshake blend in better; sends "bootstrap phase" status events to
1000 the controller, so it can keep the user informed of progress (and
1001 problems) fetching directory information and establishing circuits;
1002 and adds a variety of smaller features.
1005 - More work on making our TLS handshake blend in: modify the list
1006 of ciphers advertised by OpenSSL in client mode to even more
1007 closely resemble a common web browser. We cheat a little so that
1008 we can advertise ciphers that the locally installed OpenSSL doesn't
1010 - Start sending "bootstrap phase" status events to the controller,
1011 so it can keep the user informed of progress fetching directory
1012 information and establishing circuits. Also inform the controller
1013 if we think we're stuck at a particular bootstrap phase. Implements
1015 - Resume using OpenSSL's RAND_poll() for better (and more portable)
1016 cross-platform entropy collection again. We used to use it, then
1017 stopped using it because of a bug that could crash systems that
1018 called RAND_poll when they had a lot of fds open. It looks like the
1019 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
1020 at startup, and to call RAND_poll() when we reseed later only if
1021 we have a non-buggy OpenSSL version.
1024 - When we choose to abandon a new entry guard because we think our
1025 older ones might be better, close any circuits pending on that
1026 new entry guard connection. This fix should make us recover much
1027 faster when our network is down and then comes back. Bugfix on
1028 0.1.2.8-beta; found by lodger.
1030 o Memory fixes and improvements:
1031 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
1032 to avoid unused RAM in buffer chunks and memory pools.
1033 - Speed up parsing and cut down on memory fragmentation by using
1034 stack-style allocations for parsing directory objects. Previously,
1035 this accounted for over 40% of allocations from within Tor's code
1036 on a typical directory cache.
1037 - Use a Bloom filter rather than a digest-based set to track which
1038 descriptors we need to keep around when we're cleaning out old
1039 router descriptors. This speeds up the computation significantly,
1040 and may reduce fragmentation.
1041 - Reduce the default smartlist size from 32 to 16; it turns out that
1042 most smartlists hold around 8-12 elements tops.
1043 - Make dumpstats() log the fullness and size of openssl-internal
1045 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
1046 patch to their OpenSSL, turn it on to save memory on servers. This
1047 patch will (with any luck) get included in a mainline distribution
1049 - Never use OpenSSL compression: it wastes RAM and CPU trying to
1050 compress cells, which are basically all encrypted, compressed,
1054 - Stop reloading the router list from disk for no reason when we
1055 run out of reachable directory mirrors. Once upon a time reloading
1056 it would set the 'is_running' flag back to 1 for them. It hasn't
1057 done that for a long time.
1058 - In very rare situations new hidden service descriptors were
1059 published earlier than 30 seconds after the last change to the
1060 service. (We currently think that a hidden service descriptor
1061 that's been stable for 30 seconds is worth publishing.)
1064 - Allow separate log levels to be configured for different logging
1065 domains. For example, this allows one to log all notices, warnings,
1066 or errors, plus all memory management messages of level debug or
1067 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
1068 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
1069 and stop using a warning that had become unfixably verbose under
1071 - New --hush command-line option similar to --quiet. While --quiet
1072 disables all logging to the console on startup, --hush limits the
1073 output to messages of warning and error severity.
1074 - Servers support a new URL scheme for consensus downloads that
1075 allows the client to specify which authorities are trusted.
1076 The server then only sends the consensus if the client will trust
1077 it. Otherwise a 404 error is sent back. Clients use this
1078 new scheme when the server supports it (meaning it's running
1079 0.2.1.1-alpha or later). Implements proposal 134.
1080 - New configure/torrc options (--enable-geoip-stats,
1081 DirRecordUsageByCountry) to record how many IPs we've served
1082 directory info to in each country code, how many status documents
1083 total we've sent to each country code, and what share of the total
1084 directory requests we should expect to see.
1085 - Use the TLS1 hostname extension to more closely resemble browser
1087 - Lots of new unit tests.
1088 - Add a macro to implement the common pattern of iterating through
1089 two parallel lists in lockstep.
1092 Changes in version 0.2.0.28-rc - 2008-06-13
1093 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
1094 performance bug, and fixes a bunch of smaller bugs.
1097 - Fix a bug where, when we were choosing the 'end stream reason' to
1098 put in our relay end cell that we send to the exit relay, Tor
1099 clients on Windows were sometimes sending the wrong 'reason'. The
1100 anonymity problem is that exit relays may be able to guess whether
1101 the client is running Windows, thus helping partition the anonymity
1102 set. Down the road we should stop sending reasons to exit relays,
1103 or otherwise prevent future versions of this bug.
1106 - While setting up a hidden service, some valid introduction circuits
1107 were overlooked and abandoned. This might be the reason for
1108 the long delay in making a hidden service available. Bugfix on
1112 - Update to the "June 9 2008" ip-to-country file.
1113 - Run 'make test' as part of 'make dist', so we stop releasing so
1114 many development snapshots that fail their unit tests.
1117 - When we're checking if we have enough dir info for each relay
1118 to begin establishing circuits, make sure that we actually have
1119 the descriptor listed in the consensus, not just any descriptor.
1121 - Bridge relays no longer print "xx=0" in their extrainfo document
1122 for every single country code in the geoip db. Bugfix on
1124 - Only warn when we fail to load the geoip file if we were planning to
1125 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
1126 - If we change our MaxAdvertisedBandwidth and then reload torrc,
1127 Tor won't realize it should publish a new relay descriptor. Fixes
1128 bug 688, reported by mfr. Bugfix on 0.1.2.x.
1129 - When we haven't had any application requests lately, don't bother
1130 logging that we have expired a bunch of descriptors. Bugfix
1132 - Make relay cells written on a connection count as non-padding when
1133 tracking how long a connection has been in use. Bugfix on
1134 0.2.0.1-alpha. Spotted by lodger.
1135 - Fix unit tests in 0.2.0.27-rc.
1136 - Fix compile on Windows.
1139 Changes in version 0.2.0.27-rc - 2008-06-03
1140 Tor 0.2.0.27-rc adds a few features we left out of the earlier
1141 release candidates. In particular, we now include an IP-to-country
1142 GeoIP database, so controllers can easily look up what country a
1143 given relay is in, and so bridge relays can give us some sanitized
1144 summaries about which countries are making use of bridges. (See proposal
1145 126-geoip-fetching.txt for details.)
1148 - Include an IP-to-country GeoIP file in the tarball, so bridge
1149 relays can report sanitized summaries of the usage they're seeing.
1152 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
1153 Robert Hogan. Fixes the first part of bug 681.
1154 - Make bridge authorities never serve extrainfo docs.
1155 - Add support to detect Libevent versions in the 1.4.x series
1157 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
1158 - Include a new contrib/tor-exit-notice.html file that exit relay
1159 operators can put on their website to help reduce abuse queries.
1162 - When tunneling an encrypted directory connection, and its first
1163 circuit fails, do not leave it unattached and ask the controller
1164 to deal. Fixes the second part of bug 681.
1165 - Make bridge authorities correctly expire old extrainfo documents
1169 Changes in version 0.2.0.26-rc - 2008-05-13
1170 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
1171 in Debian's OpenSSL packages. All users running any 0.2.0.x version
1172 should upgrade, whether they're running Debian or not.
1174 o Major security fixes:
1175 - Use new V3 directory authority keys on the tor26, gabelmoo, and
1176 moria1 V3 directory authorities. The old keys were generated with
1177 a vulnerable version of Debian's OpenSSL package, and must be
1178 considered compromised. Other authorities' keys were not generated
1179 with an affected version of OpenSSL.
1182 - List authority signatures as "unrecognized" based on DirServer
1183 lines, not on cert cache. Bugfix on 0.2.0.x.
1186 - Add a new V3AuthUseLegacyKey option to make it easier for
1187 authorities to change their identity keys if they have to.
1190 Changes in version 0.2.0.25-rc - 2008-04-23
1191 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
1194 - Remember to initialize threading before initializing logging.
1195 Otherwise, many BSD-family implementations will crash hard on
1196 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
1199 - Authorities correctly free policies on bad servers on
1200 exit. Fixes bug 672. Bugfix on 0.2.0.x.
1203 Changes in version 0.2.0.24-rc - 2008-04-22
1204 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
1205 v3 directory authority, makes relays with dynamic IP addresses and no
1206 DirPort notice more quickly when their IP address changes, fixes a few
1207 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
1209 o New directory authorities:
1210 - Take lefkada out of the list of v3 directory authorities, since
1211 it has been down for months.
1212 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
1216 - Detect address changes more quickly on non-directory mirror
1217 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
1219 o Minor features (security):
1220 - Reject requests for reverse-dns lookup of names that are in
1221 a private address space. Patch from lodger.
1222 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
1225 o Minor bugfixes (crashes):
1226 - Avoid a rare assert that can trigger when Tor doesn't have much
1227 directory information yet and it tries to fetch a v2 hidden
1228 service descriptor. Fixes bug 651, reported by nwf.
1229 - Initialize log mutex before initializing dmalloc. Otherwise,
1230 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
1231 - Use recursive pthread mutexes in order to avoid deadlock when
1232 logging debug-level messages to a controller. Bug spotted by nwf,
1233 bugfix on 0.2.0.16-alpha.
1235 o Minor bugfixes (resource management):
1236 - Keep address policies from leaking memory: start their refcount
1237 at 1, not 2. Bugfix on 0.2.0.16-alpha.
1238 - Free authority certificates on exit, so they don't look like memory
1239 leaks. Bugfix on 0.2.0.19-alpha.
1240 - Free static hashtables for policy maps and for TLS connections on
1241 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
1242 - Avoid allocating extra space when computing consensuses on 64-bit
1243 platforms. Bug spotted by aakova.
1245 o Minor bugfixes (misc):
1246 - Do not read the configuration file when we've only been told to
1247 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
1248 based on patch from Sebastian Hahn.
1249 - Exit relays that are used as a client can now reach themselves
1250 using the .exit notation, rather than just launching an infinite
1251 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
1252 - When attempting to open a logfile fails, tell us why.
1253 - Fix a dumb bug that was preventing us from knowing that we should
1254 preemptively build circuits to handle expected directory requests.
1255 Fixes bug 660. Bugfix on 0.1.2.x.
1256 - Warn less verbosely about clock skew from netinfo cells from
1257 untrusted sources. Fixes bug 663.
1258 - Make controller stream events for DNS requests more consistent,
1259 by adding "new stream" events for DNS requests, and removing
1260 spurious "stream closed" events" for cached reverse resolves.
1261 Patch from mwenge. Fixes bug 646.
1262 - Correctly notify one-hop connections when a circuit build has
1263 failed. Possible fix for bug 669. Found by lodger.
1266 Changes in version 0.2.0.23-rc - 2008-03-24
1267 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
1268 makes bootstrapping faster if the first directory mirror you contact
1269 is down. The bundles also include the new Vidalia 0.1.2 release.
1272 - When a tunneled directory request is made to a directory server
1273 that's down, notice after 30 seconds rather than 120 seconds. Also,
1274 fail any begindir streams that are pending on it, so they can
1275 retry elsewhere. This was causing multi-minute delays on bootstrap.
1278 Changes in version 0.2.0.22-rc - 2008-03-18
1279 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
1280 enables encrypted directory connections by default for non-relays, fixes
1281 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
1282 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
1285 - Enable encrypted directory connections by default for non-relays,
1286 so censor tools that block Tor directory connections based on their
1287 plaintext patterns will no longer work. This means Tor works in
1288 certain censored countries by default again.
1291 - Make sure servers always request certificates from clients during
1292 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
1293 - Do not enter a CPU-eating loop when a connection is closed in
1294 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
1295 diagnosed by lodger; bugfix on 0.2.0.20-rc.
1296 - Fix assertion failure that could occur when a blocked circuit
1297 became unblocked, and it had pending client DNS requests. Bugfix
1298 on 0.2.0.1-alpha. Fixes bug 632.
1300 o Minor bugfixes (on 0.1.2.x):
1301 - Generate "STATUS_SERVER" events rather than misspelled
1302 "STATUS_SEVER" events. Caught by mwenge.
1303 - When counting the number of bytes written on a TLS connection,
1304 look at the BIO actually used for writing to the network, not
1305 at the BIO used (sometimes) to buffer data for the network.
1306 Looking at different BIOs could result in write counts on the
1307 order of ULONG_MAX. Fixes bug 614.
1308 - On Windows, correctly detect errors when listing the contents of
1309 a directory. Fix from lodger.
1311 o Minor bugfixes (on 0.2.0.x):
1312 - Downgrade "sslv3 alert handshake failure" message to INFO.
1313 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
1314 left BandwidthRate and BandwidthBurst at the default, we would be
1315 silently limited by those defaults. Now raise them to match the
1316 RelayBandwidth* values.
1317 - Fix the SVK version detection logic to work correctly on a branch.
1318 - Make --enable-openbsd-malloc work correctly on Linux with alpha
1319 CPUs. Fixes bug 625.
1320 - Logging functions now check that the passed severity is sane.
1321 - Use proper log levels in the testsuite call of
1322 get_interface_address6().
1323 - When using a nonstandard malloc, do not use the platform values for
1324 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
1325 - Make the openbsd malloc code use 8k pages on alpha CPUs and
1327 - Detect mismatched page sizes when using --enable-openbsd-malloc.
1328 - Avoid double-marked-for-close warning when certain kinds of invalid
1329 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
1330 for bug 617. Bugfix on 0.2.0.1-alpha.
1331 - Make sure that the "NULL-means-reject *:*" convention is followed by
1332 all the policy manipulation functions, avoiding some possible crash
1333 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
1334 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
1335 actually works, and doesn't warn about every single reverse lookup.
1336 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
1339 - Only log guard node status when guard node status has changed.
1340 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
1341 make "INFO" 75% less verbose.
1344 Changes in version 0.2.0.21-rc - 2008-03-02
1345 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
1346 makes Tor work well with Vidalia again, fixes a rare assert bug,
1347 and fixes a pair of more minor bugs. The bundles also include Vidalia
1348 0.1.0 and Torbutton 1.1.16.
1351 - The control port should declare that it requires password auth
1352 when HashedControlSessionPassword is set too. Patch from Matt Edman;
1353 bugfix on 0.2.0.20-rc. Fixes bug 615.
1354 - Downgrade assert in connection_buckets_decrement() to a log message.
1355 This may help us solve bug 614, and in any case will make its
1356 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
1357 - We were sometimes miscounting the number of bytes read from the
1358 network, causing our rate limiting to not be followed exactly.
1359 Bugfix on 0.2.0.16-alpha. Reported by lodger.
1362 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
1363 OpenSSL versions should have been working fine. Diagnosis and patch
1364 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
1365 Bugfix on 0.2.0.20-rc.
1368 Changes in version 0.2.0.20-rc - 2008-02-24
1369 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
1370 makes more progress towards normalizing Tor's TLS handshake, makes
1371 hidden services work better again, helps relays bootstrap if they don't
1372 know their IP address, adds optional support for linking in openbsd's
1373 allocator or tcmalloc, allows really fast relays to scale past 15000
1374 sockets, and fixes a bunch of minor bugs reported by Veracode.
1377 - Enable the revised TLS handshake based on the one designed by
1378 Steven Murdoch in proposal 124, as revised in proposal 130. It
1379 includes version negotiation for OR connections as described in
1380 proposal 105. The new handshake is meant to be harder for censors
1381 to fingerprint, and it adds the ability to detect certain kinds of
1382 man-in-the-middle traffic analysis attacks. The version negotiation
1383 feature will allow us to improve Tor's link protocol more safely
1385 - Choose which bridge to use proportional to its advertised bandwidth,
1386 rather than uniformly at random. This should speed up Tor for
1387 bridge users. Also do this for people who set StrictEntryNodes.
1388 - When a TrackHostExits-chosen exit fails too many times in a row,
1389 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
1392 - Resolved problems with (re-)fetching hidden service descriptors.
1393 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
1395 - If we only ever used Tor for hidden service lookups or posts, we
1396 would stop building circuits and start refusing connections after
1397 24 hours, since we falsely believed that Tor was dormant. Reported
1398 by nwf; bugfix on 0.1.2.x.
1399 - Servers that don't know their own IP address should go to the
1400 authorities for their first directory fetch, even if their DirPort
1401 is off or if they don't know they're reachable yet. This will help
1402 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
1403 - When counting the number of open sockets, count not only the number
1404 of sockets we have received from the socket() call, but also
1405 the number we've gotten from accept() and socketpair(). This bug
1406 made us fail to count all sockets that we were using for incoming
1407 connections. Bugfix on 0.2.0.x.
1408 - Fix code used to find strings within buffers, when those strings
1409 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
1410 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
1411 - Add a new __HashedControlSessionPassword option for controllers
1412 to use for one-off session password hashes that shouldn't get
1413 saved to disk by SAVECONF --- Vidalia users were accumulating a
1414 pile of HashedControlPassword lines in their torrc files, one for
1415 each time they had restarted Tor and then clicked Save. Make Tor
1416 automatically convert "HashedControlPassword" to this new option but
1417 only when it's given on the command line. Partial fix for bug 586.
1419 o Minor features (performance):
1420 - Tune parameters for cell pool allocation to minimize amount of
1422 - Add OpenBSD malloc code from phk as an optional malloc
1423 replacement on Linux: some glibc libraries do very poorly
1424 with Tor's memory allocation patterns. Pass
1425 --enable-openbsd-malloc to get the replacement malloc code.
1426 - Add a --with-tcmalloc option to the configure script to link
1427 against tcmalloc (if present). Does not yet search for
1428 non-system include paths.
1429 - Stop imposing an arbitrary maximum on the number of file descriptors
1430 used for busy servers. Bug reported by Olaf Selke; patch from
1433 o Minor features (other):
1434 - When SafeLogging is disabled, log addresses along with all TLS
1436 - When building with --enable-gcc-warnings, check for whether Apple's
1437 warning "-Wshorten-64-to-32" is available.
1438 - Add a --passphrase-fd argument to the tor-gencert command for
1441 o Minor bugfixes (memory leaks and code problems):
1442 - We were leaking a file descriptor if Tor started with a zero-length
1443 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
1444 - Detect size overflow in zlib code. Reported by Justin Ferguson and
1446 - We were comparing the raw BridgePassword entry with a base64'ed
1447 version of it, when handling a "/tor/networkstatus-bridges"
1448 directory request. Now compare correctly. Noticed by Veracode.
1449 - Recover from bad tracked-since value in MTBF-history file.
1451 - Alter the code that tries to recover from unhandled write
1452 errors, to not try to flush onto a socket that's given us
1453 unhandled errors. Bugfix on 0.1.2.x.
1454 - Make Unix controlsockets work correctly on OpenBSD. Patch from
1455 tup. Bugfix on 0.2.0.3-alpha.
1457 o Minor bugfixes (other):
1458 - If we have an extra-info document for our server, always make
1459 it available on the control port, even if we haven't gotten
1460 a copy of it from an authority yet. Patch from mwenge.
1461 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
1462 - Directory mirrors no longer include a guess at the client's IP
1463 address if the connection appears to be coming from the same /24
1464 network; it was producing too many wrong guesses.
1465 - Make the new hidden service code respect the SafeLogging setting.
1466 Bugfix on 0.2.0.x. Patch from Karsten.
1467 - When starting as an authority, do not overwrite all certificates
1468 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
1469 - If we're trying to flush the last bytes on a connection (for
1470 example, when answering a directory request), reset the
1471 time-to-give-up timeout every time we manage to write something
1472 on the socket. Bugfix on 0.1.2.x.
1473 - Change the behavior of "getinfo status/good-server-descriptor"
1474 so it doesn't return failure when any authority disappears.
1475 - Even though the man page said that "TrackHostExits ." should
1476 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
1477 - Report TLS "zero return" case as a "clean close" and "IO error"
1478 as a "close". Stop calling closes "unexpected closes": existing
1479 Tors don't use SSL_close(), so having a connection close without
1480 the TLS shutdown handshake is hardly unexpected.
1481 - Send NAMESERVER_STATUS messages for a single failed nameserver
1484 o Code simplifications and refactoring:
1485 - Remove the tor_strpartition function: its logic was confused,
1486 and it was only used for one thing that could be implemented far
1490 Changes in version 0.2.0.19-alpha - 2008-02-09
1491 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
1492 handshake, makes path selection for relays more secure and IP address
1493 guessing more robust, and generally fixes a lot of bugs in preparation
1494 for calling the 0.2.0 branch stable.
1497 - Do not include recognizeable strings in the commonname part of
1498 Tor's x509 certificates.
1501 - If we're a relay, avoid picking ourselves as an introduction point,
1502 a rendezvous point, or as the final hop for internal circuits. Bug
1503 reported by taranis and lodger. Bugfix on 0.1.2.x.
1504 - Patch from "Andrew S. Lists" to catch when we contact a directory
1505 mirror at IP address X and he says we look like we're coming from
1506 IP address X. Bugfix on 0.1.2.x.
1508 o Minor features (security):
1509 - Be more paranoid about overwriting sensitive memory on free(),
1510 as a defensive programming tactic to ensure forward secrecy.
1512 o Minor features (directory authority):
1513 - Actually validate the options passed to AuthDirReject,
1514 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
1515 - Reject router descriptors with out-of-range bandwidthcapacity or
1516 bandwidthburst values.
1518 o Minor features (controller):
1519 - Reject controller commands over 1MB in length. This keeps rogue
1520 processes from running us out of memory.
1522 o Minor features (misc):
1523 - Give more descriptive well-formedness errors for out-of-range
1524 hidden service descriptor/protocol versions.
1525 - Make memory debugging information describe more about history
1526 of cell allocation, so we can help reduce our memory use.
1528 o Deprecated features (controller):
1529 - The status/version/num-versioning and status/version/num-concurring
1530 GETINFO options are no longer useful in the v3 directory protocol:
1531 treat them as deprecated, and warn when they're used.
1534 - When our consensus networkstatus has been expired for a while, stop
1535 being willing to build circuits using it. Fixes bug 401. Bugfix
1537 - Directory caches now fetch certificates from all authorities
1538 listed in a networkstatus consensus, even when they do not
1539 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
1540 - When connecting to a bridge without specifying its key, insert
1541 the connection into the identity-to-connection map as soon as
1542 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
1543 - Detect versions of OS X where malloc_good_size() is present in the
1544 library but never actually declared. Resolves bug 587. Bugfix
1546 - Stop incorrectly truncating zlib responses to directory authority
1547 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
1548 - Stop recommending that every server operator send mail to tor-ops.
1549 Resolves bug 597. Bugfix on 0.1.2.x.
1550 - Don't trigger an assert if we start a directory authority with a
1551 private IP address (like 127.0.0.1).
1552 - Avoid possible failures when generating a directory with routers
1553 with over-long versions strings, or too many flags set. Bugfix
1555 - If an attempt to launch a DNS resolve request over the control
1556 port fails because we have overrun the limit on the number of
1557 connections, tell the controller that the request has failed.
1558 - Avoid using too little bandwidth when our clock skips a few
1559 seconds. Bugfix on 0.1.2.x.
1560 - Fix shell error when warning about missing packages in configure
1561 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
1562 - Do not become confused when receiving a spurious VERSIONS-like
1563 cell from a confused v1 client. Bugfix on 0.2.0.x.
1564 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
1565 introduction points for a hidden service have failed. Patch from
1566 Karsten Loesing. Bugfix on 0.2.0.x.
1568 o Code simplifications and refactoring:
1569 - Remove some needless generality from cpuworker code, for improved
1571 - Stop overloading the circuit_t.onionskin field for both "onionskin
1572 from a CREATE cell that we are waiting for a cpuworker to be
1573 assigned" and "onionskin from an EXTEND cell that we are going to
1574 send to an OR as soon as we are connected". Might help with bug 600.
1575 - Add an in-place version of aes_crypt() so that we can avoid doing a
1576 needless memcpy() call on each cell payload.
1579 Changes in version 0.2.0.18-alpha - 2008-01-25
1580 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
1581 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
1582 that can warn or reject connections to ports generally associated with
1583 vulnerable-plaintext protocols.
1585 o New directory authorities:
1586 - Set up dannenberg (run by CCC) as the sixth v3 directory
1590 - Fix a major memory leak when attempting to use the v2 TLS
1591 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
1592 - We accidentally enabled the under-development v2 TLS handshake
1593 code, which was causing log entries like "TLS error while
1594 renegotiating handshake". Disable it again. Resolves bug 590.
1595 - We were computing the wrong Content-Length: header for directory
1596 responses that need to be compressed on the fly, causing clients
1597 asking for those items to always fail. Bugfix on 0.2.0.x; partially
1601 - Avoid going directly to the directory authorities even if you're a
1602 relay, if you haven't found yourself reachable yet or if you've
1603 decided not to advertise your dirport yet. Addresses bug 556.
1604 - If we've gone 12 hours since our last bandwidth check, and we
1605 estimate we have less than 50KB bandwidth capacity but we could
1606 handle more, do another bandwidth test.
1607 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
1608 Tor can warn and/or refuse connections to ports commonly used with
1609 vulnerable-plaintext protocols. Currently we warn on ports 23,
1610 109, 110, and 143, but we don't reject any.
1613 - When we setconf ClientOnly to 1, close any current OR and Dir
1614 listeners. Reported by mwenge.
1615 - When we get a consensus that's been signed by more people than
1616 we expect, don't log about it; it's not a big deal. Reported
1620 - Don't answer "/tor/networkstatus-bridges" directory requests if
1621 the request isn't encrypted.
1622 - Make "ClientOnly 1" config option disable directory ports too.
1623 - Patches from Karsten Loesing to make v2 hidden services more
1624 robust: work even when there aren't enough HSDir relays available;
1625 retry when a v2 rend desc fetch fails; but don't retry if we
1626 already have a usable v0 rend desc.
1629 Changes in version 0.2.0.17-alpha - 2008-01-17
1630 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
1633 - Make the tor-gencert man page get included correctly in the tarball.
1636 Changes in version 0.2.0.16-alpha - 2008-01-17
1637 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
1638 Loesing, and generally cleans up a lot of features and minor bugs.
1640 o New directory authorities:
1641 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
1644 o Major performance improvements:
1645 - Switch our old ring buffer implementation for one more like that
1646 used by free Unix kernels. The wasted space in a buffer with 1mb
1647 of data will now be more like 8k than 1mb. The new implementation
1648 also avoids realloc();realloc(); patterns that can contribute to
1649 memory fragmentation.
1652 - Configuration files now accept C-style strings as values. This
1653 helps encode characters not allowed in the current configuration
1654 file format, such as newline or #. Addresses bug 557.
1655 - Although we fixed bug 539 (where servers would send HTTP status 503
1656 responses _and_ send a body too), there are still servers out
1657 there that haven't upgraded. Therefore, make clients parse such
1658 bodies when they receive them.
1659 - When we're not serving v2 directory information, there is no reason
1660 to actually keep any around. Remove the obsolete files and directory
1661 on startup if they are very old and we aren't going to serve them.
1663 o Minor performance improvements:
1664 - Reference-count and share copies of address policy entries; only 5%
1665 of them were actually distinct.
1666 - Never walk through the list of logs if we know that no log is
1667 interested in a given message.
1670 - When an authority has not signed a consensus, do not try to
1671 download a nonexistent "certificate with key 00000000". Bugfix
1672 on 0.2.0.x. Fixes bug 569.
1673 - Fix a rare assert error when we're closing one of our threads:
1674 use a mutex to protect the list of logs, so we never write to the
1675 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
1676 bug 575, which is kind of the revenge of bug 222.
1677 - Patch from Karsten Loesing to complain less at both the client
1678 and the relay when a relay used to have the HSDir flag but doesn't
1679 anymore, and we try to upload a hidden service descriptor.
1680 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
1682 - Do not try to download missing certificates until we have tried
1683 to check our fallback consensus. Fixes bug 583.
1684 - Make bridges round reported GeoIP stats info up to the nearest
1685 estimate, not down. Now we can distinguish between "0 people from
1686 this country" and "1 person from this country".
1687 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
1688 - Avoid possible segfault if key generation fails in
1689 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
1690 - Avoid segfault in the case where a badly behaved v2 versioning
1691 directory sends a signed networkstatus with missing client-versions.
1693 - Avoid segfaults on certain complex invocations of
1694 router_get_by_hexdigest(). Bugfix on 0.1.2.
1695 - Correct bad index on array access in parse_http_time(). Bugfix
1697 - Fix possible bug in vote generation when server versions are present
1698 but client versions are not.
1699 - Fix rare bug on REDIRECTSTREAM control command when called with no
1700 port set: it could erroneously report an error when none had
1702 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
1703 compressing large objects and find ourselves with more than 4k
1704 left over. Bugfix on 0.2.0.
1705 - Fix a small memory leak when setting up a hidden service.
1706 - Fix a few memory leaks that could in theory happen under bizarre
1708 - Fix an assert if we post a general-purpose descriptor via the
1709 control port but that descriptor isn't mentioned in our current
1710 network consensus. Bug reported by Jon McLachlan; bugfix on
1713 o Minor features (controller):
1714 - Get NS events working again. Patch from tup.
1715 - The GETCONF command now escapes and quotes configuration values
1716 that don't otherwise fit into the torrc file.
1717 - The SETCONF command now handles quoted values correctly.
1719 o Minor features (directory authorities):
1720 - New configuration options to override default maximum number of
1721 servers allowed on a single IP address. This is important for
1722 running a test network on a single host.
1723 - Actually implement the -s option to tor-gencert.
1724 - Add a manual page for tor-gencert.
1726 o Minor features (bridges):
1727 - Bridge authorities no longer serve bridge descriptors over
1728 unencrypted connections.
1730 o Minor features (other):
1731 - Add hidden services and DNSPorts to the list of things that make
1732 Tor accept that it has running ports. Change starting Tor with no
1733 ports from a fatal error to a warning; we might change it back if
1734 this turns out to confuse anybody. Fixes bug 579.
1737 Changes in version 0.1.2.19 - 2008-01-17
1738 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
1739 exit policy a little bit more conservative so it's safer to run an
1740 exit relay on a home system, and fixes a variety of smaller issues.
1743 - Exit policies now reject connections that are addressed to a
1744 relay's public (external) IP address too, unless
1745 ExitPolicyRejectPrivate is turned off. We do this because too
1746 many relays are running nearby to services that trust them based
1750 - When the clock jumps forward a lot, do not allow the bandwidth
1751 buckets to become negative. Fixes bug 544.
1752 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
1753 on every successful resolve. Reported by Mike Perry.
1754 - Purge old entries from the "rephist" database and the hidden
1755 service descriptor database even when DirPort is zero.
1756 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
1757 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
1758 crashing or mis-answering these requests.
1759 - When we decide to send a 503 response to a request for servers, do
1760 not then also send the server descriptors: this defeats the whole
1761 purpose. Fixes bug 539.
1764 - Changing the ExitPolicyRejectPrivate setting should cause us to
1765 rebuild our server descriptor.
1766 - Fix handling of hex nicknames when answering controller requests for
1767 networkstatus by name, or when deciding whether to warn about
1768 unknown routers in a config option. (Patch from mwenge.)
1769 - Fix a couple of hard-to-trigger autoconf problems that could result
1770 in really weird results on platforms whose sys/types.h files define
1771 nonstandard integer types.
1772 - Don't try to create the datadir when running --verify-config or
1773 --hash-password. Resolves bug 540.
1774 - If we were having problems getting a particular descriptor from the
1775 directory caches, and then we learned about a new descriptor for
1776 that router, we weren't resetting our failure count. Reported
1778 - Although we fixed bug 539 (where servers would send HTTP status 503
1779 responses _and_ send a body too), there are still servers out there
1780 that haven't upgraded. Therefore, make clients parse such bodies
1781 when they receive them.
1782 - Run correctly on systems where rlim_t is larger than unsigned long.
1783 This includes some 64-bit systems.
1784 - Run correctly on platforms (like some versions of OS X 10.5) where
1785 the real limit for number of open files is OPEN_FILES, not rlim_max
1786 from getrlimit(RLIMIT_NOFILES).
1787 - Avoid a spurious free on base64 failure.
1788 - Avoid segfaults on certain complex invocations of
1789 router_get_by_hexdigest().
1790 - Fix rare bug on REDIRECTSTREAM control command when called with no
1791 port set: it could erroneously report an error when none had
1795 Changes in version 0.2.0.15-alpha - 2007-12-25
1796 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
1797 features added in 0.2.0.13-alpha.
1800 - Fix several remotely triggerable asserts based on DirPort requests
1801 for a v2 or v3 networkstatus object before we were prepared. This
1802 was particularly bad for 0.2.0.13 and later bridge relays, who
1803 would never have a v2 networkstatus and would thus always crash
1804 when used. Bugfixes on 0.2.0.x.
1805 - Estimate the v3 networkstatus size more accurately, rather than
1806 estimating it at zero bytes and giving it artificially high priority
1807 compared to other directory requests. Bugfix on 0.2.0.x.
1810 - Fix configure.in logic for cross-compilation.
1811 - When we load a bridge descriptor from the cache, and it was
1812 previously unreachable, mark it as retriable so we won't just
1813 ignore it. Also, try fetching a new copy immediately. Bugfixes
1815 - The bridge GeoIP stats were counting other relays, for example
1816 self-reachability and authority-reachability tests.
1819 - Support compilation to target iPhone; patch from cjacker huang.
1820 To build for iPhone, pass the --enable-iphone option to configure.
1823 Changes in version 0.2.0.14-alpha - 2007-12-23
1825 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
1826 without a datadirectory from a previous Tor install. Reported
1828 - Fix a crash when we fetch a descriptor that turns out to be
1829 unexpected (it used to be in our networkstatus when we started
1830 fetching it, but it isn't in our current networkstatus), and we
1831 aren't using bridges. Bugfix on 0.2.0.x.
1832 - Fix a crash when accessing hidden services: it would work the first
1833 time you use a given introduction point for your service, but
1834 on subsequent requests we'd be using garbage memory. Fixed by
1835 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
1836 - Fix a crash when we load a bridge descriptor from disk but we don't
1837 currently have a Bridge line for it in our torrc. Bugfix on
1841 - If bridge authorities set BridgePassword, they will serve a
1842 snapshot of known bridge routerstatuses from their DirPort to
1843 anybody who knows that password. Unset by default.
1846 - Make the unit tests build again.
1847 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
1848 - Make PublishServerDescriptor default to 1, so the default doesn't
1849 have to change as we invent new directory protocol versions.
1850 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
1851 be included unless sys/time.h is already included. Fixes
1852 bug 553. Bugfix on 0.2.0.x.
1853 - If we receive a general-purpose descriptor and then receive an
1854 identical bridge-purpose descriptor soon after, don't discard
1855 the next one as a duplicate.
1858 - If BridgeRelay is set to 1, then the default for
1859 PublishServerDescriptor is now "bridge" rather than "v2,v3".
1860 - If the user sets RelayBandwidthRate but doesn't set
1861 RelayBandwidthBurst, then make them equal rather than erroring out.
1864 Changes in version 0.2.0.13-alpha - 2007-12-21
1865 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
1866 Goodell, fixes many more bugs, and adds a lot of infrastructure for
1869 o New directory authorities:
1870 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
1874 - Only update guard status (usable / not usable) once we have
1875 enough directory information. This was causing us to always pick
1876 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
1877 causing us to discard all our guards on startup if we hadn't been
1878 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
1879 - Purge old entries from the "rephist" database and the hidden
1880 service descriptor databases even when DirPort is zero. Bugfix
1882 - We were ignoring our RelayBandwidthRate for the first 30 seconds
1883 after opening a circuit -- even a relayed circuit. Bugfix on
1885 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
1886 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
1887 crashing or mis-answering these types of requests.
1888 - Relays were publishing their server descriptor to v1 and v2
1889 directory authorities, but they didn't try publishing to v3-only
1890 authorities. Fix this; and also stop publishing to v1 authorities.
1892 - When we were reading router descriptors from cache, we were ignoring
1893 the annotations -- so for example we were reading in bridge-purpose
1894 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
1895 - When we decided to send a 503 response to a request for servers, we
1896 were then also sending the server descriptors: this defeats the
1897 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
1900 - Bridge relays now behave like clients with respect to time
1901 intervals for downloading new consensus documents -- otherwise they
1902 stand out. Bridge users now wait until the end of the interval,
1903 so their bridge relay will be sure to have a new consensus document.
1904 - Three new config options (AlternateDirAuthority,
1905 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
1906 user selectively replace the default directory authorities by type,
1907 rather than the all-or-nothing replacement that DirServer offers.
1908 - Tor can now be configured to read a GeoIP file from disk in one
1909 of two formats. This can be used by controllers to map IP addresses
1910 to countries. Eventually, it may support exit-by-country.
1911 - When possible, bridge relays remember which countries users
1912 are coming from, and report aggregate information in their
1913 extra-info documents, so that the bridge authorities can learn
1914 where Tor is blocked.
1915 - Bridge directory authorities now do reachability testing on the
1916 bridges they know. They provide router status summaries to the
1917 controller via "getinfo ns/purpose/bridge", and also dump summaries
1918 to a file periodically.
1919 - Stop fetching directory info so aggressively if your DirPort is
1920 on but your ORPort is off; stop fetching v2 dir info entirely.
1921 You can override these choices with the new FetchDirInfoEarly
1925 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
1926 consensus documents when there are too many relays at a single
1927 IP address. Now clear it in v2 network status documents too, and
1928 also clear it in routerinfo_t when the relay is no longer listed
1929 in the relevant networkstatus document.
1930 - Don't crash if we get an unexpected value for the
1931 PublishServerDescriptor config option. Reported by Matt Edman;
1932 bugfix on 0.2.0.9-alpha.
1933 - Our new v2 hidden service descriptor format allows descriptors
1934 that have no introduction points. But Tor crashed when we tried
1935 to build a descriptor with no intro points (and it would have
1936 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
1938 - Fix building with dmalloc 5.5.2 with glibc.
1939 - Reject uploaded descriptors and extrainfo documents if they're
1940 huge. Otherwise we'll cache them all over the network and it'll
1941 clog everything up. Reported by Aljosha Judmayer.
1942 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
1943 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
1944 - When the DANGEROUS_VERSION controller status event told us we're
1945 running an obsolete version, it used the string "OLD" to describe
1946 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
1947 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
1948 - If we can't expand our list of entry guards (e.g. because we're
1949 using bridges or we have StrictEntryNodes set), don't mark relays
1950 down when they fail a directory request. Otherwise we're too quick
1951 to mark all our entry points down. Bugfix on 0.1.2.x.
1952 - Fix handling of hex nicknames when answering controller requests for
1953 networkstatus by name, or when deciding whether to warn about unknown
1954 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
1955 - Fix a couple of hard-to-trigger autoconf problems that could result
1956 in really weird results on platforms whose sys/types.h files define
1957 nonstandard integer types. Bugfix on 0.1.2.x.
1958 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
1959 - Don't crash on name lookup when we have no current consensus. Fixes
1960 bug 538; bugfix on 0.2.0.x.
1961 - Only Tors that want to mirror the v2 directory info should
1962 create the "cached-status" directory in their datadir. (All Tors
1963 used to create it.) Bugfix on 0.2.0.9-alpha.
1964 - Directory authorities should only automatically download Extra Info
1965 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
1968 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
1969 consumers. (We already do this on HUP.)
1970 - Authorities and caches fetch the v2 networkstatus documents
1971 less often, now that v3 is encouraged.
1972 - Add a new config option BridgeRelay that specifies you want to
1973 be a bridge relay. Right now the only difference is that it makes
1974 you answer begin_dir requests, and it makes you cache dir info,
1975 even if your DirPort isn't on.
1976 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
1977 ask about source, timestamp of arrival, purpose, etc. We need
1978 something like this to help Vidalia not do GeoIP lookups on bridge
1980 - Allow multiple HashedControlPassword config lines, to support
1981 multiple controller passwords.
1982 - Authorities now decide whether they're authoritative for a given
1983 router based on the router's purpose.
1984 - New config options AuthDirBadDir and AuthDirListBadDirs for
1985 authorities to mark certain relays as "bad directories" in the
1986 networkstatus documents. Also supports the "!baddir" directive in
1987 the approved-routers file.
1990 Changes in version 0.2.0.12-alpha - 2007-11-16
1991 This twelfth development snapshot fixes some more build problems as
1992 well as a few minor bugs.
1995 - Make it build on OpenBSD again. Patch from tup.
1996 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
1997 package-building for Red Hat, OS X, etc.
1999 o Minor bugfixes (on 0.1.2.x):
2000 - Changing the ExitPolicyRejectPrivate setting should cause us to
2001 rebuild our server descriptor.
2003 o Minor bugfixes (on 0.2.0.x):
2004 - When we're lacking a consensus, don't try to perform rendezvous
2005 operations. Reported by Karsten Loesing.
2006 - Fix a small memory leak whenever we decide against using a
2007 newly picked entry guard. Reported by Mike Perry.
2008 - When authorities detected more than two relays running on the same
2009 IP address, they were clearing all the status flags but forgetting
2010 to clear the "hsdir" flag. So clients were being told that a
2011 given relay was the right choice for a v2 hsdir lookup, yet they
2012 never had its descriptor because it was marked as 'not running'
2014 - If we're trying to fetch a bridge descriptor and there's no way
2015 the bridge authority could help us (for example, we don't know
2016 a digest, or there is no bridge authority), don't be so eager to
2017 fall back to asking the bridge authority.
2018 - If we're using bridges or have strictentrynodes set, and our
2019 chosen exit is in the same family as all our bridges/entry guards,
2020 then be flexible about families.
2023 - When we negotiate a v2 link-layer connection (not yet implemented),
2024 accept RELAY_EARLY cells and turn them into RELAY cells if we've
2025 negotiated a v1 connection for their next step. Initial code for
2029 Changes in version 0.2.0.11-alpha - 2007-11-12
2030 This eleventh development snapshot fixes some build problems with
2031 the previous snapshot. It also includes a more secure-by-default exit
2032 policy for relays, fixes an enormous memory leak for exit relays, and
2033 fixes another bug where servers were falling out of the directory list.
2036 - Exit policies now reject connections that are addressed to a
2037 relay's public (external) IP address too, unless
2038 ExitPolicyRejectPrivate is turned off. We do this because too
2039 many relays are running nearby to services that trust them based
2040 on network address. Bugfix on 0.1.2.x.
2043 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
2044 on every successful resolve. Reported by Mike Perry; bugfix
2046 - On authorities, never downgrade to old router descriptors simply
2047 because they're listed in the consensus. This created a catch-22
2048 where we wouldn't list a new descriptor because there was an
2049 old one in the consensus, and we couldn't get the new one in the
2050 consensus because we wouldn't list it. Possible fix for bug 548.
2051 Also, this might cause bug 543 to appear on authorities; if so,
2052 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
2054 o Packaging fixes on 0.2.0.10-alpha:
2055 - We were including instructions about what to do with the
2056 src/config/fallback-consensus file, but we weren't actually
2057 including it in the tarball. Disable all of that for now.
2060 - Allow people to say PreferTunnelledDirConns rather than
2061 PreferTunneledDirConns, for those alternate-spellers out there.
2064 - Don't reevaluate all the information from our consensus document
2065 just because we've downloaded a v2 networkstatus that we intend
2066 to cache. Fixes bug 545; bugfix on 0.2.0.x.
2069 Changes in version 0.2.0.10-alpha - 2007-11-10
2070 This tenth development snapshot adds a third v3 directory authority
2071 run by Mike Perry, adds most of Karsten Loesing's new hidden service
2072 descriptor format, fixes a bad crash bug and new bridge bugs introduced
2073 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
2074 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
2075 addresses many more minor issues.
2077 o New directory authorities:
2078 - Set up ides (run by Mike Perry) as the third v3 directory authority.
2081 - Allow tunnelled directory connections to ask for an encrypted
2082 "begin_dir" connection or an anonymized "uses a full Tor circuit"
2083 connection independently. Now we can make anonymized begin_dir
2084 connections for (e.g.) more secure hidden service posting and
2086 - More progress on proposal 114: code from Karsten Loesing to
2087 implement new hidden service descriptor format.
2088 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
2089 accommodate the growing number of servers that use the default
2090 and are reaching it.
2091 - Directory authorities use a new formula for selecting which nodes
2092 to advertise as Guards: they must be in the top 7/8 in terms of
2093 how long we have known about them, and above the median of those
2094 nodes in terms of weighted fractional uptime.
2095 - Make "not enough dir info yet" warnings describe *why* Tor feels
2096 it doesn't have enough directory info yet.
2099 - Stop servers from crashing if they set a Family option (or
2100 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
2102 - Make bridge users work again -- the move to v3 directories in
2103 0.2.0.9-alpha had introduced a number of bugs that made bridges
2104 no longer work for clients.
2105 - When the clock jumps forward a lot, do not allow the bandwidth
2106 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
2108 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
2109 - When the consensus lists a router descriptor that we previously were
2110 mirroring, but that we considered non-canonical, reload the
2111 descriptor as canonical. This fixes bug 543 where Tor servers
2112 would start complaining after a few days that they don't have
2113 enough directory information to build a circuit.
2114 - Consider replacing the current consensus when certificates arrive
2115 that make the pending consensus valid. Previously, we were only
2116 considering replacement when the new certs _didn't_ help.
2117 - Fix an assert error on startup if we didn't already have the
2118 consensus and certs cached in our datadirectory: we were caching
2119 the consensus in consensus_waiting_for_certs but then free'ing it
2121 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
2122 Request) if we need more v3 certs but we've already got pending
2123 requests for all of them.
2124 - Correctly back off from failing certificate downloads. Fixes
2126 - Authorities don't vote on the Running flag if they have been running
2127 for less than 30 minutes themselves. Fixes bug 547, where a newly
2128 started authority would vote that everyone was down.
2131 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
2132 it, it had no AES, and it hasn't seen any security patches since
2136 - Clients now hold circuitless TLS connections open for 1.5 times
2137 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
2138 rebuild a new circuit over them within that timeframe. Previously,
2139 they held them open only for KeepalivePeriod (5 minutes).
2140 - Use "If-Modified-Since" to avoid retrieving consensus
2141 networkstatuses that we already have.
2142 - When we have no consensus, check FallbackNetworkstatusFile (defaults
2143 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
2144 we start knowing some directory caches.
2145 - When we receive a consensus from the future, warn about skew.
2146 - Improve skew reporting: try to give the user a better log message
2147 about how skewed they are, and how much this matters.
2148 - When we have a certificate for an authority, believe that
2149 certificate's claims about the authority's IP address.
2150 - New --quiet command-line option to suppress the default console log.
2151 Good in combination with --hash-password.
2152 - Authorities send back an X-Descriptor-Not-New header in response to
2153 an accepted-but-discarded descriptor upload. Partially implements
2155 - Make the log message for "tls error. breaking." more useful.
2156 - Better log messages about certificate downloads, to attempt to
2157 track down the second incarnation of bug 546.
2159 o Minor features (bridges):
2160 - If bridge users set UpdateBridgesFromAuthority, but the digest
2161 they ask for is a 404 from the bridge authority, they now fall
2162 back to trying the bridge directly.
2163 - Bridges now use begin_dir to publish their server descriptor to
2164 the bridge authority, even when they haven't set TunnelDirConns.
2166 o Minor features (controller):
2167 - When reporting clock skew, and we know that the clock is _at least
2168 as skewed_ as some value, but we don't know the actual value,
2169 report the value as a "minimum skew."
2172 - Update linux-tor-prio.sh script to allow QoS based on the uid of
2173 the Tor process. Patch from Marco Bonetti with tweaks from Mike
2177 - Refuse to start if both ORPort and UseBridges are set. Bugfix
2178 on 0.2.0.x, suggested by Matt Edman.
2179 - Don't stop fetching descriptors when FetchUselessDescriptors is
2180 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
2181 reported by tup and ioerror.
2182 - Better log message on vote from unknown authority.
2183 - Don't log "Launching 0 request for 0 router" message.
2185 o Minor bugfixes (memory leaks):
2186 - Stop leaking memory every time we parse a v3 certificate. Bugfix
2188 - Stop leaking memory every time we load a v3 certificate. Bugfix
2189 on 0.2.0.1-alpha. Fixes bug 536.
2190 - Stop leaking a cached networkstatus on exit. Bugfix on
2192 - Stop leaking voter information every time we free a consensus.
2193 Bugfix on 0.2.0.3-alpha.
2194 - Stop leaking signed data every time we check a voter signature.
2195 Bugfix on 0.2.0.3-alpha.
2196 - Stop leaking a signature every time we fail to parse a consensus or
2197 a vote. Bugfix on 0.2.0.3-alpha.
2198 - Stop leaking v2_download_status_map on shutdown. Bugfix on
2200 - Stop leaking conn->nickname every time we make a connection to a
2201 Tor relay without knowing its expected identity digest (e.g. when
2202 using bridges). Bugfix on 0.2.0.3-alpha.
2204 - Minor bugfixes (portability):
2205 - Run correctly on platforms where rlim_t is larger than unsigned
2206 long, and/or where the real limit for number of open files is
2207 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
2208 particular, these may be needed for OS X 10.5.
2211 Changes in version 0.1.2.18 - 2007-10-28
2212 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
2213 hidden service introduction that were causing huge delays, and a big
2214 bug that was causing some servers to disappear from the network status
2215 lists for a few hours each day.
2217 o Major bugfixes (crashes):
2218 - If a connection is shut down abruptly because of something that
2219 happened inside connection_flushed_some(), do not call
2220 connection_finished_flushing(). Should fix bug 451:
2221 "connection_stop_writing: Assertion conn->write_event failed"
2222 Bugfix on 0.1.2.7-alpha.
2223 - Fix possible segfaults in functions called from
2224 rend_process_relay_cell().
2226 o Major bugfixes (hidden services):
2227 - Hidden services were choosing introduction points uniquely by
2228 hexdigest, but when constructing the hidden service descriptor
2229 they merely wrote the (potentially ambiguous) nickname.
2230 - Clients now use the v2 intro format for hidden service
2231 connections: they specify their chosen rendezvous point by identity
2232 digest rather than by (potentially ambiguous) nickname. These
2233 changes could speed up hidden service connections dramatically.
2235 o Major bugfixes (other):
2236 - Stop publishing a new server descriptor just because we get a
2237 HUP signal. This led (in a roundabout way) to some servers getting
2238 dropped from the networkstatus lists for a few hours each day.
2239 - When looking for a circuit to cannibalize, consider family as well
2240 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
2241 circuit cannibalization).
2242 - When a router wasn't listed in a new networkstatus, we were leaving
2243 the flags for that router alone -- meaning it remained Named,
2244 Running, etc -- even though absence from the networkstatus means
2245 that it shouldn't be considered to exist at all anymore. Now we
2246 clear all the flags for routers that fall out of the networkstatus
2247 consensus. Fixes bug 529.
2250 - Don't try to access (or alter) the state file when running
2251 --list-fingerprint or --verify-config or --hash-password. Resolves
2253 - When generating information telling us how to extend to a given
2254 router, do not try to include the nickname if it is
2255 absent. Resolves bug 467.
2256 - Fix a user-triggerable segfault in expand_filename(). (There isn't
2257 a way to trigger this remotely.)
2258 - When sending a status event to the controller telling it that an
2259 OR address is reachable, set the port correctly. (Previously we
2260 were reporting the dir port.)
2261 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
2262 command. Bugfix on 0.1.2.17.
2263 - When loading bandwidth history, do not believe any information in
2264 the future. Fixes bug 434.
2265 - When loading entry guard information, do not believe any information
2267 - When we have our clock set far in the future and generate an
2268 onion key, then re-set our clock to be correct, we should not stop
2269 the onion key from getting rotated.
2270 - On some platforms, accept() can return a broken address. Detect
2271 this more quietly, and deal accordingly. Fixes bug 483.
2272 - It's not actually an error to find a non-pending entry in the DNS
2273 cache when canceling a pending resolve. Don't log unless stuff
2274 is fishy. Resolves bug 463.
2275 - Don't reset trusted dir server list when we set a configuration
2276 option. Patch from Robert Hogan.
2277 - Don't try to create the datadir when running --verify-config or
2278 --hash-password. Resolves bug 540.
2281 Changes in version 0.2.0.9-alpha - 2007-10-24
2282 This ninth development snapshot switches clients to the new v3 directory
2283 system; allows servers to be listed in the network status even when they
2284 have the same nickname as a registered server; and fixes many other
2285 bugs including a big one that was causing some servers to disappear
2286 from the network status lists for a few hours each day.
2288 o Major features (directory system):
2289 - Clients now download v3 consensus networkstatus documents instead
2290 of v2 networkstatus documents. Clients and caches now base their
2291 opinions about routers on these consensus documents. Clients only
2292 download router descriptors listed in the consensus.
2293 - Authorities now list servers who have the same nickname as
2294 a different named server, but list them with a new flag,
2295 "Unnamed". Now we can list servers that happen to pick the same
2296 nickname as a server that registered two years ago and then
2297 disappeared. Partially implements proposal 122.
2298 - If the consensus lists a router as "Unnamed", the name is assigned
2299 to a different router: do not identify the router by that name.
2300 Partially implements proposal 122.
2301 - Authorities can now come to a consensus on which method to use to
2302 compute the consensus. This gives us forward compatibility.
2305 - Stop publishing a new server descriptor just because we HUP or
2306 when we find our DirPort to be reachable but won't actually publish
2307 it. New descriptors without any real changes are dropped by the
2308 authorities, and can screw up our "publish every 18 hours" schedule.
2310 - When a router wasn't listed in a new networkstatus, we were leaving
2311 the flags for that router alone -- meaning it remained Named,
2312 Running, etc -- even though absence from the networkstatus means
2313 that it shouldn't be considered to exist at all anymore. Now we
2314 clear all the flags for routers that fall out of the networkstatus
2315 consensus. Fixes bug 529; bugfix on 0.1.2.x.
2316 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
2317 extrainfo documents and then discard them immediately for not
2318 matching the latest router. Bugfix on 0.2.0.1-alpha.
2320 o Minor features (v3 directory protocol):
2321 - Allow tor-gencert to generate a new certificate without replacing
2323 - Allow certificates to include an address.
2324 - When we change our directory-cache settings, reschedule all voting
2325 and download operations.
2326 - Reattempt certificate downloads immediately on failure, as long as
2327 we haven't failed a threshold number of times yet.
2328 - Delay retrying consensus downloads while we're downloading
2329 certificates to verify the one we just got. Also, count getting a
2330 consensus that we already have (or one that isn't valid) as a failure,
2331 and count failing to get the certificates after 20 minutes as a
2333 - Build circuits and download descriptors even if our consensus is a
2334 little expired. (This feature will go away once authorities are
2337 o Minor features (router descriptor cache):
2338 - If we find a cached-routers file that's been sitting around for more
2339 than 28 days unmodified, then most likely it's a leftover from
2340 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
2342 - When we (as a cache) download a descriptor because it was listed
2343 in a consensus, remember when the consensus was supposed to expire,
2344 and don't expire the descriptor until then.
2346 o Minor features (performance):
2347 - Call routerlist_remove_old_routers() much less often. This should
2348 speed startup, especially on directory caches.
2349 - Don't try to launch new descriptor downloads quite so often when we
2350 already have enough directory information to build circuits.
2351 - Base64 decoding was actually showing up on our profile when parsing
2352 the initial descriptor file; switch to an in-process all-at-once
2353 implementation that's about 3.5x times faster than calling out to
2356 o Minor features (compilation):
2357 - Detect non-ASCII platforms (if any still exist) and refuse to
2358 build there: some of our code assumes that 'A' is 65 and so on.
2360 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
2361 - Make the "next period" votes into "current period" votes immediately
2362 after publishing the consensus; avoid a heisenbug that made them
2363 stick around indefinitely.
2364 - When we discard a vote as a duplicate, do not report this as
2366 - Treat missing v3 keys or certificates as an error when running as a
2367 v3 directory authority.
2368 - When we're configured to be a v3 authority, but we're only listed
2369 as a non-v3 authority in our DirServer line for ourself, correct
2371 - If an authority doesn't have a qualified hostname, just put
2372 its address in the vote. This fixes the problem where we referred to
2373 "moria on moria:9031."
2374 - Distinguish between detached signatures for the wrong period, and
2375 detached signatures for a divergent vote.
2376 - Fix a small memory leak when computing a consensus.
2377 - When there's no concensus, we were forming a vote every 30
2378 minutes, but writing the "valid-after" line in our vote based
2379 on our configured V3AuthVotingInterval: so unless the intervals
2380 matched up, we immediately rejected our own vote because it didn't
2381 start at the voting interval that caused us to construct a vote.
2383 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
2384 - Delete unverified-consensus when the real consensus is set.
2385 - Consider retrying a consensus networkstatus fetch immediately
2386 after one fails: don't wait 60 seconds to notice.
2387 - When fetching a consensus as a cache, wait until a newer consensus
2388 should exist before trying to replace the current one.
2389 - Use a more forgiving schedule for retrying failed consensus
2390 downloads than for other types.
2392 o Minor bugfixes (other directory issues):
2393 - Correct the implementation of "download votes by digest." Bugfix on
2395 - Authorities no longer send back "400 you're unreachable please fix
2396 it" errors to Tor servers that aren't online all the time. We're
2397 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
2399 o Minor bugfixes (controller):
2400 - Don't reset trusted dir server list when we set a configuration
2401 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
2402 - Respond to INT and TERM SIGNAL commands before we execute the
2403 signal, in case the signal shuts us down. We had a patch in
2404 0.1.2.1-alpha that tried to do this by queueing the response on
2405 the connection's buffer before shutting down, but that really
2406 isn't the same thing at all. Bug located by Matt Edman.
2408 o Minor bugfixes (misc):
2409 - Correctly check for bad options to the "PublishServerDescriptor"
2410 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
2411 - Stop leaking memory on failing case of base32_decode, and make
2412 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
2413 - Don't try to download extrainfo documents when we're trying to
2414 fetch enough directory info to build a circuit: having enough
2415 info should get priority. Bugfix on 0.2.0.x.
2416 - Don't complain that "your server has not managed to confirm that its
2417 ports are reachable" if we haven't been able to build any circuits
2418 yet. Bug found by spending four hours without a v3 consensus. Bugfix
2420 - Detect the reason for failing to mmap a descriptor file we just
2421 wrote, and give a more useful log message. Fixes bug 533. Bugfix
2424 o Code simplifications and refactoring:
2425 - Remove support for the old bw_accounting file: we've been storing
2426 bandwidth accounting information in the state file since
2427 0.1.2.5-alpha. This may result in bandwidth accounting errors
2428 if you try to upgrade from 0.1.1.x or earlier, or if you try to
2429 downgrade to 0.1.1.x or earlier.
2430 - New convenience code to locate a file within the DataDirectory.
2431 - Move non-authority functionality out of dirvote.c.
2432 - Refactor the arguments for router_pick_{directory_|trusteddir}server
2433 so that they all take the same named flags.
2436 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
2437 Unix users an easy way to script their Tor process (e.g. by
2438 adjusting bandwidth based on the time of the day).
2441 Changes in version 0.2.0.8-alpha - 2007-10-12
2442 This eighth development snapshot fixes a crash bug that's been bothering
2443 us since February 2007, lets bridge authorities store a list of bridge
2444 descriptors they've seen, gets v3 directory voting closer to working,
2445 starts caching v3 directory consensus documents on directory mirrors,
2446 and fixes a variety of smaller issues including some minor memory leaks.
2448 o Major features (router descriptor cache):
2449 - Store routers in a file called cached-descriptors instead of in
2450 cached-routers. Initialize cached-descriptors from cached-routers
2451 if the old format is around. The new format allows us to store
2452 annotations along with descriptors.
2453 - Use annotations to record the time we received each descriptor, its
2454 source, and its purpose.
2455 - Disable the SETROUTERPURPOSE controller command: it is now
2457 - Controllers should now specify cache=no or cache=yes when using
2458 the +POSTDESCRIPTOR command.
2459 - Bridge authorities now write bridge descriptors to disk, meaning
2460 we can export them to other programs and begin distributing them
2463 o Major features (directory authorities):
2464 - When a v3 authority is missing votes or signatures, it now tries
2466 - Directory authorities track weighted fractional uptime as well as
2467 weighted mean-time-between failures. WFU is suitable for deciding
2468 whether a node is "usually up", while MTBF is suitable for deciding
2469 whether a node is "likely to stay up." We need both, because
2470 "usually up" is a good requirement for guards, while "likely to
2471 stay up" is a good requirement for long-lived connections.
2473 o Major features (v3 directory system):
2474 - Caches now download v3 network status documents as needed,
2475 and download the descriptors listed in them.
2476 - All hosts now attempt to download and keep fresh v3 authority
2477 certificates, and re-attempt after failures.
2478 - More internal-consistency checks for vote parsing.
2480 o Major bugfixes (crashes):
2481 - If a connection is shut down abruptly because of something that
2482 happened inside connection_flushed_some(), do not call
2483 connection_finished_flushing(). Should fix bug 451. Bugfix on
2486 o Major bugfixes (performance):
2487 - Fix really bad O(n^2) performance when parsing a long list of
2488 routers: Instead of searching the entire list for an "extra-info "
2489 string which usually wasn't there, once for every routerinfo
2490 we read, just scan lines forward until we find one we like.
2492 - When we add data to a write buffer in response to the data on that
2493 write buffer getting low because of a flush, do not consider the
2494 newly added data as a candidate for immediate flushing, but rather
2495 make it wait until the next round of writing. Otherwise, we flush
2496 and refill recursively, and a single greedy TLS connection can
2497 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
2499 o Minor features (v3 authority system):
2500 - Add more ways for tools to download the votes that lead to the
2502 - Send a 503 when low on bandwidth and a vote, consensus, or
2503 certificate is requested.
2504 - If-modified-since is now implemented properly for all kinds of
2505 certificate requests.
2507 o Minor bugfixes (network statuses):
2508 - Tweak the implementation of proposal 109 slightly: allow at most
2509 two Tor servers on the same IP address, except if it's the location
2510 of a directory authority, in which case allow five. Bugfix on
2513 o Minor bugfixes (controller):
2514 - When sending a status event to the controller telling it that an
2515 OR address is reachable, set the port correctly. (Previously we
2516 were reporting the dir port.) Bugfix on 0.1.2.x.
2518 o Minor bugfixes (v3 directory system):
2519 - Fix logic to look up a cert by its signing key digest. Bugfix on
2521 - Only change the reply to a vote to "OK" if it's not already
2522 set. This gets rid of annoying "400 OK" log messages, which may
2523 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
2524 - When we get a valid consensus, recompute the voting schedule.
2525 - Base the valid-after time of a vote on the consensus voting
2526 schedule, not on our preferred schedule.
2527 - Make the return values and messages from signature uploads and
2528 downloads more sensible.
2529 - Fix a memory leak when serving votes and consensus documents, and
2530 another when serving certificates.
2532 o Minor bugfixes (performance):
2533 - Use a slightly simpler string hashing algorithm (copying Python's
2534 instead of Java's) and optimize our digest hashing algorithm to take
2535 advantage of 64-bit platforms and to remove some possibly-costly
2537 - Fix a minor memory leak whenever we parse guards from our state
2538 file. Bugfix on 0.2.0.7-alpha.
2539 - Fix a minor memory leak whenever we write out a file. Bugfix on
2541 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
2542 command. Bugfix on 0.2.0.5-alpha.
2544 o Minor bugfixes (portability):
2545 - On some platforms, accept() can return a broken address. Detect
2546 this more quietly, and deal accordingly. Fixes bug 483.
2547 - Stop calling tor_strlower() on uninitialized memory in some cases.
2548 Bugfix in 0.2.0.7-alpha.
2550 o Minor bugfixes (usability):
2551 - Treat some 403 responses from directory servers as INFO rather than
2552 WARN-severity events.
2553 - It's not actually an error to find a non-pending entry in the DNS
2554 cache when canceling a pending resolve. Don't log unless stuff is
2555 fishy. Resolves bug 463.
2557 o Minor bugfixes (anonymity):
2558 - Never report that we've used more bandwidth than we're willing to
2559 relay: it leaks how much non-relay traffic we're using. Resolves
2561 - When looking for a circuit to cannibalize, consider family as well
2562 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
2563 circuit cannibalization).
2565 o Code simplifications and refactoring:
2566 - Make a bunch of functions static. Remove some dead code.
2567 - Pull out about a third of the really big routerlist.c; put it in a
2568 new module, networkstatus.c.
2569 - Merge the extra fields in local_routerstatus_t back into
2570 routerstatus_t: we used to need one routerstatus_t for each
2571 authority's opinion, plus a local_routerstatus_t for the locally
2572 computed consensus opinion. To save space, we put the locally
2573 modified fields into local_routerstatus_t, and only the common
2574 stuff into routerstatus_t. But once v3 directories are in use,
2575 clients and caches will no longer need to hold authority opinions;
2576 thus, the rationale for keeping the types separate is now gone.
2577 - Make the code used to reschedule and reattempt downloads more
2579 - Turn all 'Are we a directory server/mirror?' logic into a call to
2581 - Remove the code to generate the oldest (v1) directory format.
2582 The code has been disabled since 0.2.0.5-alpha.
2585 Changes in version 0.2.0.7-alpha - 2007-09-21
2586 This seventh development snapshot makes bridges work again, makes bridge
2587 authorities work for the first time, fixes two huge performance flaws
2588 in hidden services, and fixes a variety of minor issues.
2590 o New directory authorities:
2591 - Set up moria1 and tor26 as the first v3 directory authorities. See
2592 doc/spec/dir-spec.txt for details on the new directory design.
2594 o Major bugfixes (crashes):
2595 - Fix possible segfaults in functions called from
2596 rend_process_relay_cell(). Bugfix on 0.1.2.x.
2598 o Major bugfixes (bridges):
2599 - Fix a bug that made servers send a "404 Not found" in response to
2600 attempts to fetch their server descriptor. This caused Tor servers
2601 to take many minutes to establish reachability for their DirPort,
2602 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
2603 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
2604 users configure that and specify a bridge with an identity
2605 fingerprint, now they will lookup the bridge descriptor at the
2606 default bridge authority via a one-hop tunnel, but once circuits
2607 are established they will switch to a three-hop tunnel for later
2608 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
2610 o Major bugfixes (hidden services):
2611 - Hidden services were choosing introduction points uniquely by
2612 hexdigest, but when constructing the hidden service descriptor
2613 they merely wrote the (potentially ambiguous) nickname.
2614 - Clients now use the v2 intro format for hidden service
2615 connections: they specify their chosen rendezvous point by identity
2616 digest rather than by (potentially ambiguous) nickname. Both
2617 are bugfixes on 0.1.2.x, and they could speed up hidden service
2618 connections dramatically. Thanks to Karsten Loesing.
2620 o Minor features (security):
2621 - As a client, do not believe any server that tells us that an
2622 address maps to an internal address space.
2623 - Make it possible to enable HashedControlPassword and
2624 CookieAuthentication at the same time.
2626 o Minor features (guard nodes):
2627 - Tag every guard node in our state file with the version that
2628 we believe added it, or with our own version if we add it. This way,
2629 if a user temporarily runs an old version of Tor and then switches
2630 back to a new one, she doesn't automatically lose her guards.
2632 o Minor features (speed):
2633 - When implementing AES counter mode, update only the portions of the
2634 counter buffer that need to change, and don't keep separate
2635 network-order and host-order counters when they are the same (i.e.,
2636 on big-endian hosts.)
2638 o Minor features (controller):
2639 - Accept LF instead of CRLF on controller, since some software has a
2640 hard time generating real Internet newlines.
2641 - Add GETINFO values for the server status events
2642 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
2646 - Routers no longer include bandwidth-history lines in their
2647 descriptors; this information is already available in extra-info
2648 documents, and including it in router descriptors took up 60%
2649 (!) of compressed router descriptor downloads. Completes
2650 implementation of proposal 104.
2651 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
2652 and TorControl.py, as they use the old v0 controller protocol,
2653 and are obsoleted by TorFlow anyway.
2654 - Drop support for v1 rendezvous descriptors, since we never used
2655 them anyway, and the code has probably rotted by now. Based on
2656 patch from Karsten Loesing.
2657 - On OSX, stop warning the user that kqueue support in libevent is
2658 "experimental", since it seems to have worked fine for ages.
2661 - When generating information telling us how to extend to a given
2662 router, do not try to include the nickname if it is absent. Fixes
2663 bug 467. Bugfix on 0.2.0.3-alpha.
2664 - Fix a user-triggerable (but not remotely-triggerable) segfault
2665 in expand_filename(). Bugfix on 0.1.2.x.
2666 - Fix a memory leak when freeing incomplete requests from DNSPort.
2667 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
2668 - Don't try to access (or alter) the state file when running
2669 --list-fingerprint or --verify-config or --hash-password. (Resolves
2670 bug 499.) Bugfix on 0.1.2.x.
2671 - Servers used to decline to publish their DirPort if their
2672 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
2673 were below a threshold. Now they only look at BandwidthRate and
2674 RelayBandwidthRate. Bugfix on 0.1.2.x.
2675 - Remove an optimization in the AES counter-mode code that assumed
2676 that the counter never exceeded 2^68. When the counter can be set
2677 arbitrarily as an IV (as it is by Karsten's new hidden services
2678 code), this assumption no longer holds. Bugfix on 0.1.2.x.
2679 - Resume listing "AUTHORITY" flag for authorities in network status.
2680 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
2682 o Code simplifications and refactoring:
2683 - Revamp file-writing logic so we don't need to have the entire
2684 contents of a file in memory at once before we write to disk. Tor,
2686 - Turn "descriptor store" into a full-fledged type.
2687 - Move all NT services code into a separate source file.
2688 - Unify all code that computes medians, percentile elements, etc.
2689 - Get rid of a needless malloc when parsing address policies.
2692 Changes in version 0.1.2.17 - 2007-08-30
2693 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
2694 X bundles. Vidalia 0.0.14 makes authentication required for the
2695 ControlPort in the default configuration, which addresses important
2696 security risks. Everybody who uses Vidalia (or another controller)
2699 In addition, this Tor update fixes major load balancing problems with
2700 path selection, which should speed things up a lot once many people
2703 o Major bugfixes (security):
2704 - We removed support for the old (v0) control protocol. It has been
2705 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
2706 become more of a headache than it's worth.
2708 o Major bugfixes (load balancing):
2709 - When choosing nodes for non-guard positions, weight guards
2710 proportionally less, since they already have enough load. Patch
2712 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
2713 will allow fast Tor servers to get more attention.
2714 - When we're upgrading from an old Tor version, forget our current
2715 guards and pick new ones according to the new weightings. These
2716 three load balancing patches could raise effective network capacity
2717 by a factor of four. Thanks to Mike Perry for measurements.
2719 o Major bugfixes (stream expiration):
2720 - Expire not-yet-successful application streams in all cases if
2721 they've been around longer than SocksTimeout. Right now there are
2722 some cases where the stream will live forever, demanding a new
2723 circuit every 15 seconds. Fixes bug 454; reported by lodger.
2725 o Minor features (controller):
2726 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
2727 is valid before any authentication has been received. It tells
2728 a controller what kind of authentication is expected, and what
2729 protocol is spoken. Implements proposal 119.
2731 o Minor bugfixes (performance):
2732 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
2733 greatly speeding up loading cached-routers from disk on startup.
2734 - Disable sentinel-based debugging for buffer code: we squashed all
2735 the bugs that this was supposed to detect a long time ago, and now
2736 its only effect is to change our buffer sizes from nice powers of
2737 two (which platform mallocs tend to like) to values slightly over
2738 powers of two (which make some platform mallocs sad).
2740 o Minor bugfixes (misc):
2741 - If exit bandwidth ever exceeds one third of total bandwidth, then
2742 use the correct formula to weight exit nodes when choosing paths.
2743 Based on patch from Mike Perry.
2744 - Choose perfectly fairly among routers when choosing by bandwidth and
2745 weighting by fraction of bandwidth provided by exits. Previously, we
2746 would choose with only approximate fairness, and correct ourselves
2747 if we ran off the end of the list.
2748 - If we require CookieAuthentication but we fail to write the
2749 cookie file, we would warn but not exit, and end up in a state
2750 where no controller could authenticate. Now we exit.
2751 - If we require CookieAuthentication, stop generating a new cookie
2752 every time we change any piece of our config.
2753 - Refuse to start with certain directory authority keys, and
2754 encourage people using them to stop.
2755 - Terminate multi-line control events properly. Original patch
2757 - Fix a minor memory leak when we fail to find enough suitable
2758 servers to choose a circuit.
2759 - Stop leaking part of the descriptor when we run into a particularly
2760 unparseable piece of it.
2763 Changes in version 0.2.0.6-alpha - 2007-08-26
2764 This sixth development snapshot features a new Vidalia version in the
2765 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
2766 the ControlPort in the default configuration, which addresses important
2769 In addition, this snapshot fixes major load balancing problems
2770 with path selection, which should speed things up a lot once many
2771 people have upgraded. The directory authorities also use a new
2772 mean-time-between-failure approach to tracking which servers are stable,
2773 rather than just looking at the most recent uptime.
2775 o New directory authorities:
2776 - Set up Tonga as the default bridge directory authority.
2779 - Directory authorities now track servers by weighted
2780 mean-times-between-failures. When we have 4 or more days of data,
2781 use measured MTBF rather than declared uptime to decide whether
2782 to call a router Stable. Implements proposal 108.
2784 o Major bugfixes (load balancing):
2785 - When choosing nodes for non-guard positions, weight guards
2786 proportionally less, since they already have enough load. Patch
2788 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
2789 will allow fast Tor servers to get more attention.
2790 - When we're upgrading from an old Tor version, forget our current
2791 guards and pick new ones according to the new weightings. These
2792 three load balancing patches could raise effective network capacity
2793 by a factor of four. Thanks to Mike Perry for measurements.
2795 o Major bugfixes (descriptor parsing):
2796 - Handle unexpected whitespace better in malformed descriptors. Bug
2797 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
2800 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
2801 GETINFO for Torstat to use until it can switch to using extrainfos.
2802 - Optionally (if built with -DEXPORTMALLINFO) export the output
2803 of mallinfo via http, as tor/mallinfo.txt. Only accessible
2807 - Do not intermix bridge routers with controller-added
2808 routers. (Bugfix on 0.2.0.x)
2809 - Do not fail with an assert when accept() returns an unexpected
2810 address family. Addresses but does not wholly fix bug 483. (Bugfix
2812 - Let directory authorities startup even when they can't generate
2813 a descriptor immediately, e.g. because they don't know their
2815 - Stop putting the authentication cookie in a file called "0"
2816 in your working directory if you don't specify anything for the
2817 new CookieAuthFile option. Reported by Matt Edman.
2818 - Make it possible to read the PROTOCOLINFO response in a way that
2819 conforms to our control-spec. Reported by Matt Edman.
2820 - Fix a minor memory leak when we fail to find enough suitable
2821 servers to choose a circuit. Bugfix on 0.1.2.x.
2822 - Stop leaking part of the descriptor when we run into a particularly
2823 unparseable piece of it. Bugfix on 0.1.2.x.
2824 - Unmap the extrainfo cache file on exit.
2827 Changes in version 0.2.0.5-alpha - 2007-08-19
2828 This fifth development snapshot fixes compilation on Windows again;
2829 fixes an obnoxious client-side bug that slowed things down and put
2830 extra load on the network; gets us closer to using the v3 directory
2831 voting scheme; makes it easier for Tor controllers to use cookie-based
2832 authentication; and fixes a variety of other bugs.
2835 - Version 1 directories are no longer generated in full. Instead,
2836 authorities generate and serve "stub" v1 directories that list
2837 no servers. This will stop Tor versions 0.1.0.x and earlier from
2838 working, but (for security reasons) nobody should be running those
2841 o Major bugfixes (compilation, 0.2.0.x):
2842 - Try to fix Win32 compilation again: improve checking for IPv6 types.
2843 - Try to fix MSVC compilation: build correctly on platforms that do
2844 not define s6_addr16 or s6_addr32.
2845 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
2848 o Major bugfixes (stream expiration):
2849 - Expire not-yet-successful application streams in all cases if
2850 they've been around longer than SocksTimeout. Right now there are
2851 some cases where the stream will live forever, demanding a new
2852 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
2855 o Minor features (directory servers):
2856 - When somebody requests a list of statuses or servers, and we have
2857 none of those, return a 404 rather than an empty 200.
2859 o Minor features (directory voting):
2860 - Store v3 consensus status consensuses on disk, and reload them
2863 o Minor features (security):
2864 - Warn about unsafe ControlPort configurations.
2865 - Refuse to start with certain directory authority keys, and
2866 encourage people using them to stop.
2868 o Minor features (controller):
2869 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
2870 is valid before any authentication has been received. It tells
2871 a controller what kind of authentication is expected, and what
2872 protocol is spoken. Implements proposal 119.
2873 - New config option CookieAuthFile to choose a new location for the
2874 cookie authentication file, and config option
2875 CookieAuthFileGroupReadable to make it group-readable.
2877 o Minor features (unit testing):
2878 - Add command-line arguments to unit-test executable so that we can
2879 invoke any chosen test from the command line rather than having
2880 to run the whole test suite at once; and so that we can turn on
2881 logging for the unit tests.
2883 o Minor bugfixes (on 0.1.2.x):
2884 - If we require CookieAuthentication but we fail to write the
2885 cookie file, we would warn but not exit, and end up in a state
2886 where no controller could authenticate. Now we exit.
2887 - If we require CookieAuthentication, stop generating a new cookie
2888 every time we change any piece of our config.
2889 - When loading bandwidth history, do not believe any information in
2890 the future. Fixes bug 434.
2891 - When loading entry guard information, do not believe any information
2893 - When we have our clock set far in the future and generate an
2894 onion key, then re-set our clock to be correct, we should not stop
2895 the onion key from getting rotated.
2896 - Clean up torrc sample config file.
2897 - Do not automatically run configure from autogen.sh. This
2898 non-standard behavior tended to annoy people who have built other
2901 o Minor bugfixes (on 0.2.0.x):
2902 - Fix a bug with AutomapHostsOnResolve that would always cause
2903 the second request to fail. Bug reported by Kate. Bugfix on
2905 - Fix a bug in ADDRMAP controller replies that would sometimes
2906 try to print a NULL. Patch from tup.
2907 - Read v3 directory authority keys from the right location.
2908 - Numerous bugfixes to directory voting code.
2911 Changes in version 0.1.2.16 - 2007-08-01
2912 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
2913 remote attacker in certain situations to rewrite the user's torrc
2914 configuration file. This can completely compromise anonymity of users
2915 in most configurations, including those running the Vidalia bundles,
2916 TorK, etc. Or worse.
2918 o Major security fixes:
2919 - Close immediately after missing authentication on control port;
2920 do not allow multiple authentication attempts.
2923 Changes in version 0.2.0.4-alpha - 2007-08-01
2924 This fourth development snapshot fixes a critical security vulnerability
2925 for most users, specifically those running Vidalia, TorK, etc. Everybody
2926 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
2928 o Major security fixes:
2929 - Close immediately after missing authentication on control port;
2930 do not allow multiple authentication attempts.
2932 o Major bugfixes (compilation):
2933 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
2936 o Minor features (performance):
2937 - Be even more aggressive about releasing RAM from small
2938 empty buffers. Thanks to our free-list code, this shouldn't be too
2939 performance-intensive.
2940 - Disable sentinel-based debugging for buffer code: we squashed all
2941 the bugs that this was supposed to detect a long time ago, and
2942 now its only effect is to change our buffer sizes from nice
2943 powers of two (which platform mallocs tend to like) to values
2944 slightly over powers of two (which make some platform mallocs sad).
2945 - Log malloc statistics from mallinfo() on platforms where it
2949 Changes in version 0.2.0.3-alpha - 2007-07-29
2950 This third development snapshot introduces new experimental
2951 blocking-resistance features and a preliminary version of the v3
2952 directory voting design, and includes many other smaller features
2956 - The first pieces of our "bridge" design for blocking-resistance
2957 are implemented. People can run bridge directory authorities;
2958 people can run bridges; and people can configure their Tor clients
2959 with a set of bridges to use as the first hop into the Tor network.
2960 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
2962 - Create listener connections before we setuid to the configured
2963 User and Group. Now non-Windows users can choose port values
2964 under 1024, start Tor as root, and have Tor bind those ports
2965 before it changes to another UID. (Windows users could already
2967 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
2968 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
2969 on "vserver" accounts. (Patch from coderman.)
2970 - Be even more aggressive about separating local traffic from relayed
2971 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
2973 o Major features (experimental):
2974 - First cut of code for "v3 dir voting": directory authorities will
2975 vote on a common network status document rather than each publishing
2976 their own opinion. This code needs more testing and more corner-case
2977 handling before it's ready for use.
2980 - Directory authorities now call routers Fast if their bandwidth is
2981 at least 100KB/s, and consider their bandwidth adequate to be a
2982 Guard if it is at least 250KB/s, no matter the medians. This fix
2983 complements proposal 107. [Bugfix on 0.1.2.x]
2984 - Directory authorities now never mark more than 3 servers per IP as
2985 Valid and Running. (Implements proposal 109, by Kevin Bauer and
2987 - Minor change to organizationName and commonName generation
2988 procedures in TLS certificates during Tor handshakes, to invalidate
2989 some earlier censorware approaches. This is not a long-term
2990 solution, but applying it will give us a bit of time to look into
2991 the epidemiology of countermeasures as they spread.
2993 o Major bugfixes (directory):
2994 - Rewrite directory tokenization code to never run off the end of
2995 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
2997 o Minor features (controller):
2998 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
2999 match requests to applications. (Patch from Robert Hogan.)
3000 - Report address and port correctly on connections to DNSPort. (Patch
3002 - Add a RESOLVE command to launch hostname lookups. (Original patch
3004 - Add GETINFO status/enough-dir-info to let controllers tell whether
3005 Tor has downloaded sufficient directory information. (Patch
3007 - You can now use the ControlSocket option to tell Tor to listen for
3008 controller connections on Unix domain sockets on systems that
3009 support them. (Patch from Peter Palfrader.)
3010 - STREAM NEW events are generated for DNSPort requests and for
3011 tunneled directory connections. (Patch from Robert Hogan.)
3012 - New "GETINFO address-mappings/*" command to get address mappings
3013 with expiry information. "addr-mappings/*" is now deprecated.
3016 o Minor features (misc):
3017 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
3019 - The tor-gencert tool for v3 directory authorities now creates all
3020 files as readable to the file creator only, and write-protects
3021 the authority identity key.
3022 - When dumping memory usage, list bytes used in buffer memory
3024 - When running with dmalloc, dump more stats on hup and on exit.
3025 - Directory authorities now fail quickly and (relatively) harmlessly
3026 if they generate a network status document that is somehow
3029 o Traffic load balancing improvements:
3030 - If exit bandwidth ever exceeds one third of total bandwidth, then
3031 use the correct formula to weight exit nodes when choosing paths.
3032 (Based on patch from Mike Perry.)
3033 - Choose perfectly fairly among routers when choosing by bandwidth and
3034 weighting by fraction of bandwidth provided by exits. Previously, we
3035 would choose with only approximate fairness, and correct ourselves
3036 if we ran off the end of the list. [Bugfix on 0.1.2.x]
3038 o Performance improvements:
3039 - Be more aggressive with freeing buffer RAM or putting it on the
3041 - Use Critical Sections rather than Mutexes for synchronizing threads
3042 on win32; Mutexes are heavier-weight, and designed for synchronizing
3045 o Deprecated and removed features:
3046 - RedirectExits is now deprecated.
3047 - Stop allowing address masks that do not correspond to bit prefixes.
3048 We have warned about these for a really long time; now it's time
3049 to reject them. (Patch from croup.)
3051 o Minor bugfixes (directory):
3052 - Fix another crash bug related to extra-info caching. (Bug found by
3053 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
3054 - Directories no longer return a "304 not modified" when they don't
3055 have the networkstatus the client asked for. Also fix a memory
3056 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
3057 - We had accidentally labelled 0.1.2.x directory servers as not
3058 suitable for begin_dir requests, and had labelled no directory
3059 servers as suitable for uploading extra-info documents. [Bugfix
3062 o Minor bugfixes (dns):
3063 - Fix a crash when DNSPort is set more than once. (Patch from Robert
3064 Hogan.) [Bugfix on 0.2.0.2-alpha]
3065 - Add DNSPort connections to the global connection list, so that we
3066 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
3068 - Fix a dangling reference that could lead to a crash when DNSPort is
3069 changed or closed (Patch from Robert Hogan.) [Bugfix on
3072 o Minor bugfixes (controller):
3073 - Provide DNS expiry times in GMT, not in local time. For backward
3074 compatibility, ADDRMAP events only provide GMT expiry in an extended
3075 field. "GETINFO address-mappings" always does the right thing.
3076 - Use CRLF line endings properly in NS events.
3077 - Terminate multi-line control events properly. (Original patch
3078 from tup.) [Bugfix on 0.1.2.x-alpha]
3079 - Do not include spaces in SOURCE_ADDR fields in STREAM
3080 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
3083 Changes in version 0.1.2.15 - 2007-07-17
3084 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
3085 problems, fixes compilation on BSD, and fixes a variety of other
3086 bugs. Everybody should upgrade.
3088 o Major bugfixes (compilation):
3089 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
3091 o Major bugfixes (crashes):
3092 - Try even harder not to dereference the first character after
3093 an mmap(). Reported by lodger.
3094 - Fix a crash bug in directory authorities when we re-number the
3095 routerlist while inserting a new router.
3096 - When the cached-routers file is an even multiple of the page size,
3097 don't run off the end and crash. (Fixes bug 455; based on idea
3099 - Fix eventdns.c behavior on Solaris: It is critical to include
3100 orconfig.h _before_ sys/types.h, so that we can get the expected
3101 definition of _FILE_OFFSET_BITS.
3103 o Major bugfixes (security):
3104 - Fix a possible buffer overrun when using BSD natd support. Bug
3106 - When sending destroy cells from a circuit's origin, don't include
3107 the reason for tearing down the circuit. The spec says we didn't,
3108 and now we actually don't. Reported by lodger.
3109 - Keep streamids from different exits on a circuit separate. This
3110 bug may have allowed other routers on a given circuit to inject
3111 cells into streams. Reported by lodger; fixes bug 446.
3112 - If there's a never-before-connected-to guard node in our list,
3113 never choose any guards past it. This way we don't expand our
3114 guard list unless we need to.
3116 o Minor bugfixes (guard nodes):
3117 - Weight guard selection by bandwidth, so that low-bandwidth nodes
3118 don't get overused as guards.
3120 o Minor bugfixes (directory):
3121 - Correctly count the number of authorities that recommend each
3122 version. Previously, we were under-counting by 1.
3123 - Fix a potential crash bug when we load many server descriptors at
3124 once and some of them make others of them obsolete. Fixes bug 458.
3126 o Minor bugfixes (hidden services):
3127 - Stop tearing down the whole circuit when the user asks for a
3128 connection to a port that the hidden service didn't configure.
3131 o Minor bugfixes (misc):
3132 - On Windows, we were preventing other processes from reading
3133 cached-routers while Tor was running. Reported by janbar.
3134 - Fix a possible (but very unlikely) bug in picking routers by
3135 bandwidth. Add a log message to confirm that it is in fact
3136 unlikely. Patch from lodger.
3137 - Backport a couple of memory leak fixes.
3138 - Backport miscellaneous cosmetic bugfixes.
3141 Changes in version 0.2.0.2-alpha - 2007-06-02
3142 o Major bugfixes on 0.2.0.1-alpha:
3143 - Fix an assertion failure related to servers without extra-info digests.
3144 Resolves bugs 441 and 442.
3146 o Minor features (directory):
3147 - Support "If-Modified-Since" when answering HTTP requests for
3148 directories, running-routers documents, and network-status documents.
3149 (There's no need to support it for router descriptors, since those
3150 are downloaded by descriptor digest.)
3152 o Minor build issues:
3153 - Clear up some MIPSPro compiler warnings.
3154 - When building from a tarball on a machine that happens to have SVK
3155 installed, report the micro-revision as whatever version existed
3156 in the tarball, not as "x".
3159 Changes in version 0.2.0.1-alpha - 2007-06-01
3160 This early development snapshot provides new features for people running
3161 Tor as both a client and a server (check out the new RelayBandwidth
3162 config options); lets Tor run as a DNS proxy; and generally moves us
3163 forward on a lot of fronts.
3165 o Major features, server usability:
3166 - New config options RelayBandwidthRate and RelayBandwidthBurst:
3167 a separate set of token buckets for relayed traffic. Right now
3168 relayed traffic is defined as answers to directory requests, and
3169 OR connections that don't have any local circuits on them.
3171 o Major features, client usability:
3172 - A client-side DNS proxy feature to replace the need for
3173 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
3174 for DNS requests on port 9999, use the Tor network to resolve them
3175 anonymously, and send the reply back like a regular DNS server.
3176 The code still only implements a subset of DNS.
3177 - Make PreferTunneledDirConns and TunnelDirConns work even when
3178 we have no cached directory info. This means Tor clients can now
3179 do all of their connections protected by TLS.
3181 o Major features, performance and efficiency:
3182 - Directory authorities accept and serve "extra info" documents for
3183 routers. These documents contain fields from router descriptors
3184 that aren't usually needed, and that use a lot of excess
3185 bandwidth. Once these fields are removed from router descriptors,
3186 the bandwidth savings should be about 60%. [Partially implements
3188 - Servers upload extra-info documents to any authority that accepts
3189 them. Authorities (and caches that have been configured to download
3190 extra-info documents) download them as needed. [Partially implements
3192 - Change the way that Tor buffers data that it is waiting to write.
3193 Instead of queueing data cells in an enormous ring buffer for each
3194 client->OR or OR->OR connection, we now queue cells on a separate
3195 queue for each circuit. This lets us use less slack memory, and
3196 will eventually let us be smarter about prioritizing different kinds
3198 - Use memory pools to allocate cells with better speed and memory
3199 efficiency, especially on platforms where malloc() is inefficient.
3200 - Stop reading on edge connections when their corresponding circuit
3201 buffers are full; start again as the circuits empty out.
3203 o Major features, other:
3204 - Add an HSAuthorityRecordStats option that hidden service authorities
3205 can use to track statistics of overall hidden service usage without
3206 logging information that would be very useful to an attacker.
3207 - Start work implementing multi-level keys for directory authorities:
3208 Add a standalone tool to generate key certificates. (Proposal 103.)
3211 - Directory authorities now call routers Stable if they have an
3212 uptime of at least 30 days, even if that's not the median uptime
3213 in the network. Implements proposal 107, suggested by Kevin Bauer
3216 o Minor fixes (resource management):
3217 - Count the number of open sockets separately from the number
3218 of active connection_t objects. This will let us avoid underusing
3219 our allocated connection limit.
3220 - We no longer use socket pairs to link an edge connection to an
3221 anonymous directory connection or a DirPort test connection.
3222 Instead, we track the link internally and transfer the data
3223 in-process. This saves two sockets per "linked" connection (at the
3224 client and at the server), and avoids the nasty Windows socketpair()
3226 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
3227 for every single inactive connection_t. Free items from the
3228 4k/16k-buffer free lists when they haven't been used for a while.
3230 o Minor features (build):
3231 - Make autoconf search for libevent, openssl, and zlib consistently.
3232 - Update deprecated macros in configure.in.
3233 - When warning about missing headers, tell the user to let us
3234 know if the compile succeeds anyway, so we can downgrade the
3236 - Include the current subversion revision as part of the version
3237 string: either fetch it directly if we're in an SVN checkout, do
3238 some magic to guess it if we're in an SVK checkout, or use
3239 the last-detected version if we're building from a .tar.gz.
3240 Use this version consistently in log messages.
3242 o Minor features (logging):
3243 - Always prepend "Bug: " to any log message about a bug.
3244 - Put a platform string (e.g. "Linux i686") in the startup log
3245 message, so when people paste just their logs, we know if it's
3246 OpenBSD or Windows or what.
3247 - When logging memory usage, break down memory used in buffers by
3250 o Minor features (directory system):
3251 - New config option V2AuthoritativeDirectory that all directory
3252 authorities should set. This will let future authorities choose
3253 not to serve V2 directory information.
3254 - Directory authorities allow multiple router descriptors and/or extra
3255 info documents to be uploaded in a single go. This will make
3256 implementing proposal 104 simpler.
3258 o Minor features (controller):
3259 - Add a new config option __DisablePredictedCircuits designed for
3260 use by the controller, when we don't want Tor to build any circuits
3262 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
3263 so we can exit from the middle of the circuit.
3264 - Implement "getinfo status/circuit-established".
3265 - Implement "getinfo status/version/..." so a controller can tell
3266 whether the current version is recommended, and whether any versions
3267 are good, and how many authorities agree. (Patch from shibz.)
3269 o Minor features (hidden services):
3270 - Allow multiple HiddenServicePort directives with the same virtual
3271 port; when they occur, the user is sent round-robin to one
3272 of the target ports chosen at random. Partially fixes bug 393 by
3273 adding limited ad-hoc round-robining.
3275 o Minor features (other):
3277 - Add a new AutomapHostsOnResolve option: when it is enabled, any
3278 resolve request for hosts matching a given pattern causes Tor to
3279 generate an internal virtual address mapping for that host. This
3280 allows DNSPort to work sensibly with hidden service users. By
3281 default, .exit and .onion addresses are remapped; the list of
3282 patterns can be reconfigured with AutomapHostsSuffixes.
3283 - Add an "-F" option to tor-resolve to force a resolve for a .onion
3284 address. Thanks to the AutomapHostsOnResolve option, this is no
3285 longer a completely silly thing to do.
3286 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
3287 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
3288 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
3289 minus 1 byte: the actual maximum declared bandwidth.
3292 - Removed support for the old binary "version 0" controller protocol.
3293 This has been deprecated since 0.1.1, and warnings have been issued
3294 since 0.1.2. When we encounter a v0 control message, we now send
3295 back an error and close the connection.
3296 - Remove the old "dns worker" server DNS code: it hasn't been default
3297 since 0.1.2.2-alpha, and all the servers seem to be using the new
3300 o Minor bugfixes (portability):
3301 - Even though Windows is equally happy with / and \ as path separators,
3302 try to use \ consistently on Windows and / consistently on Unix: it
3303 makes the log messages nicer.
3304 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
3305 - Read resolv.conf files correctly on platforms where read() returns
3306 partial results on small file reads.
3308 o Minor bugfixes (directory):
3309 - Correctly enforce that elements of directory objects do not appear
3310 more often than they are allowed to appear.
3311 - When we are reporting the DirServer line we just parsed, we were
3312 logging the second stanza of the key fingerprint, not the first.
3314 o Minor bugfixes (logging):
3315 - When we hit an EOF on a log (probably because we're shutting down),
3316 don't try to remove the log from the list: just mark it as
3317 unusable. (Bulletproofs against bug 222.)
3319 o Minor bugfixes (other):
3320 - In the exitlist script, only consider the most recently published
3321 server descriptor for each server. Also, when the user requests
3322 a list of servers that _reject_ connections to a given address,
3323 explicitly exclude the IPs that also have servers that accept
3324 connections to that address. (Resolves bug 405.)
3325 - Stop allowing hibernating servers to be "stable" or "fast".
3326 - On Windows, we were preventing other processes from reading
3327 cached-routers while Tor was running. (Reported by janbar)
3328 - Make the NodeFamilies config option work. (Reported by
3329 lodger -- it has never actually worked, even though we added it
3331 - Check return values from pthread_mutex functions.
3332 - Don't save non-general-purpose router descriptors to the disk cache,
3333 because we have no way of remembering what their purpose was when
3335 - Add even more asserts to hunt down bug 417.
3336 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
3337 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
3338 Add a log message to confirm that it is in fact unlikely.
3340 o Minor bugfixes (controller):
3341 - Make 'getinfo fingerprint' return a 551 error if we're not a
3342 server, so we match what the control spec claims we do. Reported
3344 - Fix a typo in an error message when extendcircuit fails that
3345 caused us to not follow the \r\n-based delimiter protocol. Reported
3348 o Code simplifications and refactoring:
3349 - Stop passing around circuit_t and crypt_path_t pointers that are
3350 implicit in other procedure arguments.
3351 - Drop the old code to choke directory connections when the
3352 corresponding OR connections got full: thanks to the cell queue
3353 feature, OR conns don't get full any more.
3354 - Make dns_resolve() handle attaching connections to circuits
3355 properly, so the caller doesn't have to.
3356 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
3357 - Keep the connection array as a dynamic smartlist_t, rather than as
3358 a fixed-sized array. This is important, as the number of connections
3359 is becoming increasingly decoupled from the number of sockets.
3362 Changes in version 0.1.2.14 - 2007-05-25
3363 Tor 0.1.2.14 changes the addresses of two directory authorities (this
3364 change especially affects those who serve or use hidden services),
3365 and fixes several other crash- and security-related bugs.
3367 o Directory authority changes:
3368 - Two directory authorities (moria1 and moria2) just moved to new
3369 IP addresses. This change will particularly affect those who serve
3370 or use hidden services.
3372 o Major bugfixes (crashes):
3373 - If a directory server runs out of space in the connection table
3374 as it's processing a begin_dir request, it will free the exit stream
3375 but leave it attached to the circuit, leading to unpredictable
3376 behavior. (Reported by seeess, fixes bug 425.)
3377 - Fix a bug in dirserv_remove_invalid() that would cause authorities
3378 to corrupt memory under some really unlikely scenarios.
3379 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
3380 - Avoid segfaults when reading from mmaped descriptor file. (Reported
3383 o Major bugfixes (security):
3384 - When choosing an entry guard for a circuit, avoid using guards
3385 that are in the same family as the chosen exit -- not just guards
3386 that are exactly the chosen exit. (Reported by lodger.)
3388 o Major bugfixes (resource management):
3389 - If a directory authority is down, skip it when deciding where to get
3390 networkstatus objects or descriptors. Otherwise we keep asking
3391 every 10 seconds forever. Fixes bug 384.
3392 - Count it as a failure if we fetch a valid network-status but we
3393 don't want to keep it. Otherwise we'll keep fetching it and keep
3394 not wanting to keep it. Fixes part of bug 422.
3395 - If all of our dirservers have given us bad or no networkstatuses
3396 lately, then stop hammering them once per minute even when we
3397 think they're failed. Fixes another part of bug 422.
3400 - Actually set the purpose correctly for descriptors inserted with
3402 - When we have k non-v2 authorities in our DirServer config,
3403 we ignored the last k authorities in the list when updating our
3405 - Correctly back-off from requesting router descriptors that we are
3406 having a hard time downloading.
3407 - Read resolv.conf files correctly on platforms where read() returns
3408 partial results on small file reads.
3409 - Don't rebuild the entire router store every time we get 32K of
3410 routers: rebuild it when the journal gets very large, or when
3411 the gaps in the store get very large.
3414 - When routers publish SVN revisions in their router descriptors,
3415 authorities now include those versions correctly in networkstatus
3417 - Warn when using a version of libevent before 1.3b to run a server on
3418 OSX or BSD: these versions interact badly with userspace threads.
3421 Changes in version 0.1.2.13 - 2007-04-24
3422 This release features some major anonymity fixes, such as safer path
3423 selection; better client performance; faster bootstrapping, better
3424 address detection, and better DNS support for servers; write limiting as
3425 well as read limiting to make servers easier to run; and a huge pile of
3426 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
3428 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
3429 of the Freenode IRC network, remembering his patience and vision for
3430 free speech on the Internet.
3433 - Fix a memory leak when we ask for "all" networkstatuses and we
3434 get one we don't recognize.
3435 - Add more asserts to hunt down bug 417.
3436 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
3439 Changes in version 0.1.2.12-rc - 2007-03-16
3441 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
3442 directory information requested inside Tor connections (i.e. via
3443 begin_dir cells). It only triggered when the same connection was
3444 serving other data at the same time. Reported by seeess.
3447 - When creating a circuit via the controller, send a 'launched'
3448 event when we're done, so we follow the spec better.
3451 Changes in version 0.1.2.11-rc - 2007-03-15
3452 o Minor bugfixes (controller), reported by daejees:
3453 - Correct the control spec to match how the code actually responds
3454 to 'getinfo addr-mappings/*'.
3455 - The control spec described a GUARDS event, but the code
3456 implemented a GUARD event. Standardize on GUARD, but let people
3460 Changes in version 0.1.2.10-rc - 2007-03-07
3461 o Major bugfixes (Windows):
3462 - Do not load the NT services library functions (which may not exist)
3463 just to detect if we're a service trying to shut down. Now we run
3464 on Win98 and friends again.
3466 o Minor bugfixes (other):
3467 - Clarify a couple of log messages.
3468 - Fix a misleading socks5 error number.
3471 Changes in version 0.1.2.9-rc - 2007-03-02
3472 o Major bugfixes (Windows):
3473 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
3474 of the usual GCC "%llu". This prevents a bug when saving 64-bit
3475 int configuration values: the high-order 32 bits would get
3476 truncated. In particular, we were being bitten by the default
3477 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
3478 and maybe also bug 397.)
3480 o Minor bugfixes (performance):
3481 - Use OpenSSL's AES implementation on platforms where it's faster.
3482 This could save us as much as 10% CPU usage.
3484 o Minor bugfixes (server):
3485 - Do not rotate onion key immediately after setting it for the first
3488 o Minor bugfixes (directory authorities):
3489 - Stop calling servers that have been hibernating for a long time
3490 "stable". Also, stop letting hibernating or obsolete servers affect
3491 uptime and bandwidth cutoffs.
3492 - Stop listing hibernating servers in the v1 directory.
3494 o Minor bugfixes (hidden services):
3495 - Upload hidden service descriptors slightly less often, to reduce
3496 load on authorities.
3498 o Minor bugfixes (other):
3499 - Fix an assert that could trigger if a controller quickly set then
3500 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
3501 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
3503 - Fix a potential race condition in the rpm installer. Found by
3505 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
3506 of 2 as indicating that the server is completely bad; it sometimes
3507 means that the server is just bad for the request in question. (may fix
3508 the last of bug 326.)
3509 - Disable encrypted directory connections when we don't have a server
3510 descriptor for the destination. We'll get this working again in
3514 Changes in version 0.1.2.8-beta - 2007-02-26
3515 o Major bugfixes (crashes):
3516 - Stop crashing when the controller asks us to resetconf more than
3517 one config option at once. (Vidalia 0.0.11 does this.)
3518 - Fix a crash that happened on Win98 when we're given command-line
3519 arguments: don't try to load NT service functions from advapi32.dll
3520 except when we need them. (Bug introduced in 0.1.2.7-alpha;
3522 - Fix a longstanding obscure crash bug that could occur when
3523 we run out of DNS worker processes. (Resolves bug 390.)
3525 o Major bugfixes (hidden services):
3526 - Correctly detect whether hidden service descriptor downloads are
3527 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
3529 o Major bugfixes (accounting):
3530 - When we start during an accounting interval before it's time to wake
3531 up, remember to wake up at the correct time. (May fix bug 342.)
3533 o Minor bugfixes (controller):
3534 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
3535 clear the corresponding on_circuit variable, and remember later
3536 that we don't need to send a redundant CLOSED event. (Resolves part
3538 - Report events where a resolve succeeded or where we got a socks
3539 protocol error correctly, rather than calling both of them
3541 - Change reported stream target addresses to IP consistently when
3542 we finally get the IP from an exit node.
3543 - Send log messages to the controller even if they happen to be very
3546 o Minor bugfixes (other):
3547 - Display correct results when reporting which versions are
3548 recommended, and how recommended they are. (Resolves bug 383.)
3549 - Improve our estimates for directory bandwidth to be less random:
3550 guess that an unrecognized directory will have the average bandwidth
3551 from all known directories, not that it will have the average
3552 bandwidth from those directories earlier than it on the list.
3553 - If we start a server with ClientOnly 1, then set ClientOnly to 0
3554 and hup, stop triggering an assert based on an empty onion_key.
3555 - On platforms with no working mmap() equivalent, don't warn the
3556 user when cached-routers doesn't exist.
3557 - Warn the user when mmap() [or its equivalent] fails for some reason
3558 other than file-not-found.
3559 - Don't warn the user when cached-routers.new doesn't exist: that's
3560 perfectly fine when starting up for the first time.
3561 - When EntryNodes are configured, rebuild the guard list to contain,
3562 in order: the EntryNodes that were guards before; the rest of the
3563 EntryNodes; the nodes that were guards before.
3564 - Mask out all signals in sub-threads; only the libevent signal
3565 handler should be processing them. This should prevent some crashes
3566 on some machines using pthreads. (Patch from coderman.)
3567 - Fix switched arguments on memset in the implementation of
3568 tor_munmap() for systems with no mmap() call.
3569 - When Tor receives a router descriptor that it asked for, but
3570 no longer wants (because it has received fresh networkstatuses
3571 in the meantime), do not warn the user. Cache the descriptor if
3572 we're a cache; drop it if we aren't.
3573 - Make earlier entry guards _really_ get retried when the network
3575 - On a malformed DNS reply, always give an error to the corresponding
3577 - Build with recent libevents on platforms that do not define the
3578 nonstandard types "u_int8_t" and friends.
3580 o Minor features (controller):
3581 - Warn the user when an application uses the obsolete binary v0
3582 control protocol. We're planning to remove support for it during
3583 the next development series, so it's good to give people some
3585 - Add STREAM_BW events to report per-entry-stream bandwidth
3586 use. (Patch from Robert Hogan.)
3587 - Rate-limit SIGNEWNYM signals in response to controllers that
3588 impolitely generate them for every single stream. (Patch from
3589 mwenge; closes bug 394.)
3590 - Make REMAP stream events have a SOURCE (cache or exit), and
3591 make them generated in every case where we get a successful
3592 connected or resolved cell.
3594 o Minor bugfixes (performance):
3595 - Call router_have_min_dir_info half as often. (This is showing up in
3596 some profiles, but not others.)
3597 - When using GCC, make log_debug never get called at all, and its
3598 arguments never get evaluated, when no debug logs are configured.
3599 (This is showing up in some profiles, but not others.)
3602 - Remove some never-implemented options. Mark PathlenCoinWeight as
3604 - Implement proposal 106: Stop requiring clients to have well-formed
3605 certificates; stop checking nicknames in certificates. (Clients
3606 have certificates so that they can look like Tor servers, but in
3607 the future we might want to allow them to look like regular TLS
3608 clients instead. Nicknames in certificates serve no purpose other
3609 than making our protocol easier to recognize on the wire.)
3610 - Revise messages on handshake failure again to be even more clear about
3611 which are incoming connections and which are outgoing.
3612 - Discard any v1 directory info that's over 1 month old (for
3613 directories) or over 1 week old (for running-routers lists).
3614 - Do not warn when individual nodes in the configuration's EntryNodes,
3615 ExitNodes, etc are down: warn only when all possible nodes
3616 are down. (Fixes bug 348.)
3617 - Always remove expired routers and networkstatus docs before checking
3618 whether we have enough information to build circuits. (Fixes
3620 - Put a lower-bound on MaxAdvertisedBandwidth.
3623 Changes in version 0.1.2.7-alpha - 2007-02-06
3624 o Major bugfixes (rate limiting):
3625 - Servers decline directory requests much more aggressively when
3626 they're low on bandwidth. Otherwise they end up queueing more and
3627 more directory responses, which can't be good for latency.
3628 - But never refuse directory requests from local addresses.
3629 - Fix a memory leak when sending a 503 response for a networkstatus
3631 - Be willing to read or write on local connections (e.g. controller
3632 connections) even when the global rate limiting buckets are empty.
3633 - If our system clock jumps back in time, don't publish a negative
3634 uptime in the descriptor. Also, don't let the global rate limiting
3635 buckets go absurdly negative.
3636 - Flush local controller connection buffers periodically as we're
3637 writing to them, so we avoid queueing 4+ megabytes of data before
3640 o Major bugfixes (NT services):
3641 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
3642 command-line flag so that admins can override the default by saying
3643 "tor --service install --user "SomeUser"". This will not affect
3644 existing installed services. Also, warn the user that the service
3645 will look for its configuration file in the service user's
3646 %appdata% directory. (We can't do the 'hardwire the user's appdata
3647 directory' trick any more, since we may not have read access to that
3650 o Major bugfixes (other):
3651 - Previously, we would cache up to 16 old networkstatus documents
3652 indefinitely, if they came from nontrusted authorities. Now we
3653 discard them if they are more than 10 days old.
3654 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
3656 - Detect and reject malformed DNS responses containing circular
3658 - If exits are rare enough that we're not marking exits as guards,
3659 ignore exit bandwidth when we're deciding the required bandwidth
3661 - When we're handling a directory connection tunneled over Tor,
3662 don't fill up internal memory buffers with all the data we want
3663 to tunnel; instead, only add it if the OR connection that will
3664 eventually receive it has some room for it. (This can lead to
3665 slowdowns in tunneled dir connections; a better solution will have
3668 o Minor bugfixes (dns):
3669 - Add some defensive programming to eventdns.c in an attempt to catch
3670 possible memory-stomping bugs.
3671 - Detect and reject DNS replies containing IPv4 or IPv6 records with
3672 an incorrect number of bytes. (Previously, we would ignore the
3674 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
3675 in the correct order, and doesn't crash.
3676 - Free memory held in recently-completed DNS lookup attempts on exit.
3677 This was not a memory leak, but may have been hiding memory leaks.
3678 - Handle TTL values correctly on reverse DNS lookups.
3679 - Treat failure to parse resolv.conf as an error.
3681 o Minor bugfixes (other):
3682 - Fix crash with "tor --list-fingerprint" (reported by seeess).
3683 - When computing clock skew from directory HTTP headers, consider what
3684 time it was when we finished asking for the directory, not what
3686 - Expire socks connections if they spend too long waiting for the
3687 handshake to finish. Previously we would let them sit around for
3688 days, if the connecting application didn't close them either.
3689 - And if the socks handshake hasn't started, don't send a
3690 "DNS resolve socks failed" handshake reply; just close it.
3691 - Stop using C functions that OpenBSD's linker doesn't like.
3692 - Don't launch requests for descriptors unless we have networkstatuses
3693 from at least half of the authorities. This delays the first
3694 download slightly under pathological circumstances, but can prevent
3695 us from downloading a bunch of descriptors we don't need.
3696 - Do not log IPs with TLS failures for incoming TLS
3697 connections. (Fixes bug 382.)
3698 - If the user asks to use invalid exit nodes, be willing to use
3700 - Stop using the reserved ac_cv namespace in our configure script.
3701 - Call stat() slightly less often; use fstat() when possible.
3702 - Refactor the way we handle pending circuits when an OR connection
3703 completes or fails, in an attempt to fix a rare crash bug.
3704 - Only rewrite a conn's address based on X-Forwarded-For: headers
3705 if it's a parseable public IP address; and stop adding extra quotes
3706 to the resulting address.
3709 - Weight directory requests by advertised bandwidth. Now we can
3710 let servers enable write limiting but still allow most clients to
3711 succeed at their directory requests. (We still ignore weights when
3712 choosing a directory authority; I hope this is a feature.)
3715 - Create a new file ReleaseNotes which was the old ChangeLog. The
3716 new ChangeLog file now includes the summaries for all development
3718 - Check for addresses with invalid characters at the exit as well
3719 as at the client, and warn less verbosely when they fail. You can
3720 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
3721 - Adapt a patch from goodell to let the contrib/exitlist script
3722 take arguments rather than require direct editing.
3723 - Inform the server operator when we decide not to advertise a
3724 DirPort due to AccountingMax enabled or a low BandwidthRate. It
3725 was confusing Zax, so now we're hopefully more helpful.
3726 - Bring us one step closer to being able to establish an encrypted
3727 directory tunnel without knowing a descriptor first. Still not
3728 ready yet. As part of the change, now assume we can use a
3729 create_fast cell if we don't know anything about a router.
3730 - Allow exit nodes to use nameservers running on ports other than 53.
3731 - Servers now cache reverse DNS replies.
3732 - Add an --ignore-missing-torrc command-line option so that we can
3733 get the "use sensible defaults if the configuration file doesn't
3734 exist" behavior even when specifying a torrc location on the command
3737 o Minor features (controller):
3738 - Track reasons for OR connection failure; make these reasons
3739 available via the controller interface. (Patch from Mike Perry.)
3740 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
3741 can learn when clients are sending malformed hostnames to Tor.
3742 - Clean up documentation for controller status events.
3743 - Add a REMAP status to stream events to note that a stream's
3744 address has changed because of a cached address or a MapAddress
3748 Changes in version 0.1.2.6-alpha - 2007-01-09
3750 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
3751 connection handles more than 4 gigs in either direction, we crash.
3752 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
3753 advertised exit node, somebody might try to exit from us when
3754 we're bootstrapping and before we've built our descriptor yet.
3755 Refuse the connection rather than crashing.
3758 - Warn if we (as a server) find that we've resolved an address that we
3759 weren't planning to resolve.
3760 - Warn that using select() on any libevent version before 1.1 will be
3761 unnecessarily slow (even for select()).
3762 - Flush ERR-level controller status events just like we currently
3763 flush ERR-level log events, so that a Tor shutdown doesn't prevent
3764 the controller from learning about current events.
3766 o Minor features (more controller status events):
3767 - Implement EXTERNAL_ADDRESS server status event so controllers can
3768 learn when our address changes.
3769 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
3770 can learn when directories reject our descriptor.
3771 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
3772 can learn when a client application is speaking a non-socks protocol
3774 - Implement DANGEROUS_SOCKS client status event so controllers
3775 can learn when a client application is leaking DNS addresses.
3776 - Implement BUG general status event so controllers can learn when
3777 Tor is unhappy about its internal invariants.
3778 - Implement CLOCK_SKEW general status event so controllers can learn
3779 when Tor thinks the system clock is set incorrectly.
3780 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
3781 server status events so controllers can learn when their descriptors
3782 are accepted by a directory.
3783 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
3784 server status events so controllers can learn about Tor's progress in
3785 deciding whether it's reachable from the outside.
3786 - Implement BAD_LIBEVENT general status event so controllers can learn
3787 when we have a version/method combination in libevent that needs to
3789 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
3790 and DNS_USELESS server status events so controllers can learn
3791 about changes to DNS server status.
3793 o Minor features (directory):
3794 - Authorities no longer recommend exits as guards if this would shift
3795 too much load to the exit nodes.
3798 Changes in version 0.1.2.5-alpha - 2007-01-06
3800 - Enable write limiting as well as read limiting. Now we sacrifice
3801 capacity if we're pushing out lots of directory traffic, rather
3802 than overrunning the user's intended bandwidth limits.
3803 - Include TLS overhead when counting bandwidth usage; previously, we
3804 would count only the bytes sent over TLS, but not the bytes used
3806 - Support running the Tor service with a torrc not in the same
3807 directory as tor.exe and default to using the torrc located in
3808 the %appdata%\Tor\ of the user who installed the service. Patch
3810 - Servers now check for the case when common DNS requests are going to
3811 wildcarded addresses (i.e. all getting the same answer), and change
3812 their exit policy to reject *:* if it's happening.
3813 - Implement BEGIN_DIR cells, so we can connect to the directory
3814 server via TLS to do encrypted directory requests rather than
3815 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
3816 config options if you like.
3818 o Minor features (config and docs):
3819 - Start using the state file to store bandwidth accounting data:
3820 the bw_accounting file is now obsolete. We'll keep generating it
3821 for a while for people who are still using 0.1.2.4-alpha.
3822 - Try to batch changes to the state file so that we do as few
3823 disk writes as possible while still storing important things in
3825 - The state file and the bw_accounting file get saved less often when
3826 the AvoidDiskWrites config option is set.
3827 - Make PIDFile work on Windows (untested).
3828 - Add internal descriptions for a bunch of configuration options:
3829 accessible via controller interface and in comments in saved
3831 - Reject *:563 (NNTPS) in the default exit policy. We already reject
3832 NNTP by default, so this seems like a sensible addition.
3833 - Clients now reject hostnames with invalid characters. This should
3834 avoid some inadvertent info leaks. Add an option
3835 AllowNonRFC953Hostnames to disable this behavior, in case somebody
3836 is running a private network with hosts called @, !, and #.
3837 - Add a maintainer script to tell us which options are missing
3838 documentation: "make check-docs".
3839 - Add a new address-spec.txt document to describe our special-case
3840 addresses: .exit, .onion, and .noconnnect.
3842 o Minor features (DNS):
3843 - Ongoing work on eventdns infrastructure: now it has dns server
3844 and ipv6 support. One day Tor will make use of it.
3845 - Add client-side caching for reverse DNS lookups.
3846 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
3847 - When we change nameservers or IP addresses, reset and re-launch
3848 our tests for DNS hijacking.
3850 o Minor features (directory):
3851 - Authorities now specify server versions in networkstatus. This adds
3852 about 2% to the size of compressed networkstatus docs, and allows
3853 clients to tell which servers support BEGIN_DIR and which don't.
3854 The implementation is forward-compatible with a proposed future
3855 protocol version scheme not tied to Tor versions.
3856 - DirServer configuration lines now have an orport= option so
3857 clients can open encrypted tunnels to the authorities without
3858 having downloaded their descriptors yet. Enabled for moria1,
3859 moria2, tor26, and lefkada now in the default configuration.
3860 - Directory servers are more willing to send a 503 "busy" if they
3861 are near their write limit, especially for v1 directory requests.
3862 Now they can use their limited bandwidth for actual Tor traffic.
3863 - Clients track responses with status 503 from dirservers. After a
3864 dirserver has given us a 503, we try not to use it until an hour has
3865 gone by, or until we have no dirservers that haven't given us a 503.
3866 - When we get a 503 from a directory, and we're not a server, we don't
3867 count the failure against the total number of failures allowed
3868 for the thing we're trying to download.
3869 - Report X-Your-Address-Is correctly from tunneled directory
3870 connections; don't report X-Your-Address-Is when it's an internal
3871 address; and never believe reported remote addresses when they're
3873 - Protect against an unlikely DoS attack on directory servers.
3874 - Add a BadDirectory flag to network status docs so that authorities
3875 can (eventually) tell clients about caches they believe to be
3878 o Minor features (controller):
3879 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
3880 - Reimplement GETINFO so that info/names stays in sync with the
3882 - Implement "GETINFO fingerprint".
3883 - Implement "SETEVENTS GUARD" so controllers can get updates on
3884 entry guard status as it changes.
3886 o Minor features (clean up obsolete pieces):
3887 - Remove some options that have been deprecated since at least
3888 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
3889 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
3891 - We no longer look for identity and onion keys in "identity.key" and
3892 "onion.key" -- these were replaced by secret_id_key and
3893 secret_onion_key in 0.0.8pre1.
3894 - We no longer require unrecognized directory entries to be
3897 o Major bugfixes (security):
3898 - Stop sending the HttpProxyAuthenticator string to directory
3899 servers when directory connections are tunnelled through Tor.
3900 - Clients no longer store bandwidth history in the state file.
3901 - Do not log introduction points for hidden services if SafeLogging
3903 - When generating bandwidth history, round down to the nearest
3904 1k. When storing accounting data, round up to the nearest 1k.
3905 - When we're running as a server, remember when we last rotated onion
3906 keys, so that we will rotate keys once they're a week old even if
3907 we never stay up for a week ourselves.
3909 o Major bugfixes (other):
3910 - Fix a longstanding bug in eventdns that prevented the count of
3911 timed-out resolves from ever being reset. This bug caused us to
3912 give up on a nameserver the third time it timed out, and try it
3913 10 seconds later... and to give up on it every time it timed out
3915 - Take out the '5 second' timeout from the connection retry
3916 schedule. Now the first connect attempt will wait a full 10
3917 seconds before switching to a new circuit. Perhaps this will help
3918 a lot. Based on observations from Mike Perry.
3919 - Fix a bug on the Windows implementation of tor_mmap_file() that
3920 would prevent the cached-routers file from ever loading. Reported
3924 - Fix an assert failure when a directory authority sets
3925 AuthDirRejectUnlisted and then receives a descriptor from an
3926 unlisted router. Reported by seeess.
3927 - Avoid a double-free when parsing malformed DirServer lines.
3928 - Fix a bug when a BSD-style PF socket is first used. Patch from
3930 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
3931 to resolve an address at a given exit node even when they ask for
3933 - Servers no longer ever list themselves in their "family" line,
3934 even if configured to do so. This makes it easier to configure
3935 family lists conveniently.
3936 - When running as a server, don't fall back to 127.0.0.1 when no
3937 nameservers are configured in /etc/resolv.conf; instead, make the
3938 user fix resolv.conf or specify nameservers explicitly. (Resolves
3940 - Stop accepting certain malformed ports in configured exit policies.
3941 - Don't re-write the fingerprint file every restart, unless it has
3943 - Stop warning when a single nameserver fails: only warn when _all_ of
3944 our nameservers have failed. Also, when we only have one nameserver,
3945 raise the threshold for deciding that the nameserver is dead.
3946 - Directory authorities now only decide that routers are reachable
3947 if their identity keys are as expected.
3948 - When the user uses bad syntax in the Log config line, stop
3949 suggesting other bad syntax as a replacement.
3950 - Correctly detect ipv6 DNS capability on OpenBSD.
3952 o Minor bugfixes (controller):
3953 - Report the circuit number correctly in STREAM CLOSED events. Bug
3954 reported by Mike Perry.
3955 - Do not report bizarre values for results of accounting GETINFOs
3956 when the last second's write or read exceeds the allotted bandwidth.
3957 - Report "unrecognized key" rather than an empty string when the
3958 controller tries to fetch a networkstatus that doesn't exist.
3961 Changes in version 0.1.1.26 - 2006-12-14
3962 o Security bugfixes:
3963 - Stop sending the HttpProxyAuthenticator string to directory
3964 servers when directory connections are tunnelled through Tor.
3965 - Clients no longer store bandwidth history in the state file.
3966 - Do not log introduction points for hidden services if SafeLogging
3970 - Fix an assert failure when a directory authority sets
3971 AuthDirRejectUnlisted and then receives a descriptor from an
3972 unlisted router (reported by seeess).
3975 Changes in version 0.1.2.4-alpha - 2006-12-03
3977 - Add support for using natd; this allows FreeBSDs earlier than
3978 5.1.2 to have ipfw send connections through Tor without using
3979 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
3982 - Make all connections to addresses of the form ".noconnect"
3983 immediately get closed. This lets application/controller combos
3984 successfully test whether they're talking to the same Tor by
3985 watching for STREAM events.
3986 - Make cross.sh cross-compilation script work even when autogen.sh
3987 hasn't been run. (Patch from Michael Mohr.)
3988 - Statistics dumped by -USR2 now include a breakdown of public key
3989 operations, for profiling.
3992 - Fix a major leak when directory authorities parse their
3993 approved-routers list, a minor memory leak when we fail to pick
3994 an exit node, and a few rare leaks on errors.
3995 - Handle TransPort connections even when the server sends data before
3996 the client sends data. Previously, the connection would just hang
3997 until the client sent data. (Patch from tup based on patch from
3999 - Avoid assert failure when our cached-routers file is empty on
4003 - Don't log spurious warnings when we see a circuit close reason we
4004 don't recognize; it's probably just from a newer version of Tor.
4005 - Have directory authorities allow larger amounts of drift in uptime
4006 without replacing the server descriptor: previously, a server that
4007 restarted every 30 minutes could have 48 "interesting" descriptors
4009 - Start linking to the Tor specification and Tor reference manual
4010 correctly in the Windows installer.
4011 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4012 Tor/Privoxy we also uninstall Vidalia.
4013 - Resume building on Irix64, and fix a lot of warnings from its
4015 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
4016 when we're running as a client.
4019 Changes in version 0.1.1.25 - 2006-11-04
4021 - When a client asks us to resolve (rather than connect to)
4022 an address, and we have a cached answer, give them the cached
4023 answer. Previously, we would give them no answer at all.
4024 - We were building exactly the wrong circuits when we predict
4025 hidden service requirements, meaning Tor would have to build all
4026 its circuits on demand.
4027 - If none of our live entry guards have a high uptime, but we
4028 require a guard with a high uptime, try adding a new guard before
4029 we give up on the requirement. This patch should make long-lived
4030 connections more stable on average.
4031 - When testing reachability of our DirPort, don't launch new
4032 tests when there's already one in progress -- unreachable
4033 servers were stacking up dozens of testing streams.
4035 o Security bugfixes:
4036 - When the user sends a NEWNYM signal, clear the client-side DNS
4037 cache too. Otherwise we continue to act on previous information.
4040 - Avoid a memory corruption bug when creating a hash table for
4042 - Avoid possibility of controller-triggered crash when misusing
4043 certain commands from a v0 controller on platforms that do not
4044 handle printf("%s",NULL) gracefully.
4045 - Avoid infinite loop on unexpected controller input.
4046 - Don't log spurious warnings when we see a circuit close reason we
4047 don't recognize; it's probably just from a newer version of Tor.
4048 - Add Vidalia to the OS X uninstaller script, so when we uninstall
4049 Tor/Privoxy we also uninstall Vidalia.
4052 Changes in version 0.1.2.3-alpha - 2006-10-29
4054 - Prepare for servers to publish descriptors less often: never
4055 discard a descriptor simply for being too old until either it is
4056 recommended by no authorities, or until we get a better one for
4057 the same router. Make caches consider retaining old recommended
4058 routers for even longer.
4059 - If most authorities set a BadExit flag for a server, clients
4060 don't think of it as a general-purpose exit. Clients only consider
4061 authorities that advertise themselves as listing bad exits.
4062 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
4063 headers for content, so that we can work better in the presence of
4064 caching HTTP proxies.
4065 - Allow authorities to list nodes as bad exits by fingerprint or by
4068 o Minor features, controller:
4069 - Add a REASON field to CIRC events; for backward compatibility, this
4070 field is sent only to controllers that have enabled the extended
4071 event format. Also, add additional reason codes to explain why
4072 a given circuit has been destroyed or truncated. (Patches from
4074 - Add a REMOTE_REASON field to extended CIRC events to tell the
4075 controller about why a remote OR told us to close a circuit.
4076 - Stream events also now have REASON and REMOTE_REASON fields,
4077 working much like those for circuit events.
4078 - There's now a GETINFO ns/... field so that controllers can ask Tor
4079 about the current status of a router.
4080 - A new event type "NS" to inform a controller when our opinion of
4081 a router's status has changed.
4082 - Add a GETINFO events/names and GETINFO features/names so controllers
4083 can tell which events and features are supported.
4084 - A new CLEARDNSCACHE signal to allow controllers to clear the
4085 client-side DNS cache without expiring circuits.
4087 o Security bugfixes:
4088 - When the user sends a NEWNYM signal, clear the client-side DNS
4089 cache too. Otherwise we continue to act on previous information.
4092 - Avoid sending junk to controllers or segfaulting when a controller
4093 uses EVENT_NEW_DESC with verbose nicknames.
4094 - Stop triggering asserts if the controller tries to extend hidden
4095 service circuits (reported by mwenge).
4096 - Avoid infinite loop on unexpected controller input.
4097 - When the controller does a "GETINFO network-status", tell it
4098 about even those routers whose descriptors are very old, and use
4099 long nicknames where appropriate.
4100 - Change NT service functions to be loaded on demand. This lets us
4101 build with MinGW without breaking Tor for Windows 98 users.
4102 - Do DirPort reachability tests less often, since a single test
4103 chews through many circuits before giving up.
4104 - In the hidden service example in torrc.sample, stop recommending
4105 esoteric and discouraged hidden service options.
4106 - When stopping an NT service, wait up to 10 sec for it to actually
4107 stop. (Patch from Matt Edman; resolves bug 295.)
4108 - Fix handling of verbose nicknames with ORCONN controller events:
4109 make them show up exactly when requested, rather than exactly when
4111 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
4112 printing a duplicate "$" in the keys we send (reported by mwenge).
4113 - Correctly set maximum connection limit on Cygwin. (This time
4115 - Try to detect Windows correctly when cross-compiling.
4116 - Detect the size of the routers file correctly even if it is
4117 corrupted (on systems without mmap) or not page-aligned (on systems
4118 with mmap). This bug was harmless.
4119 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
4120 to open a stream fails; now we do in more cases. This should
4121 make clients able to find a good exit faster in some cases, since
4122 unhandleable requests will now get an error rather than timing out.
4123 - Resolve two memory leaks when rebuilding the on-disk router cache
4124 (reported by fookoowa).
4125 - Clean up minor code warnings suggested by the MIPSpro C compiler,
4126 and reported by some Centos users.
4127 - Controller signals now work on non-Unix platforms that don't define
4128 SIGUSR1 and SIGUSR2 the way we expect.
4129 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
4130 values before failing, and always enables eventdns.
4131 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
4132 Try to fix this in configure.in by checking for most functions
4133 before we check for libevent.
4136 Changes in version 0.1.2.2-alpha - 2006-10-07
4138 - Make our async eventdns library on-by-default for Tor servers,
4139 and plan to deprecate the separate dnsworker threads.
4140 - Add server-side support for "reverse" DNS lookups (using PTR
4141 records so clients can determine the canonical hostname for a given
4142 IPv4 address). Only supported by servers using eventdns; servers
4143 now announce in their descriptors whether they support eventdns.
4144 - Specify and implement client-side SOCKS5 interface for reverse DNS
4145 lookups (see doc/socks-extensions.txt).
4146 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
4147 connect to directory servers through Tor. Previously, clients needed
4148 to find Tor exits to make private connections to directory servers.
4149 - Avoid choosing Exit nodes for entry or middle hops when the
4150 total bandwidth available from non-Exit nodes is much higher than
4151 the total bandwidth available from Exit nodes.
4152 - Workaround for name servers (like Earthlink's) that hijack failing
4153 DNS requests and replace the no-such-server answer with a "helpful"
4154 redirect to an advertising-driven search portal. Also work around
4155 DNS hijackers who "helpfully" decline to hijack known-invalid
4156 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
4157 lets you turn it off.
4158 - Send out a burst of long-range padding cells once we've established
4159 that we're reachable. Spread them over 4 circuits, so hopefully
4160 a few will be fast. This exercises our bandwidth and bootstraps
4161 us into the directory more quickly.
4163 o New/improved config options:
4164 - Add new config option "ResolvConf" to let the server operator
4165 choose an alternate resolve.conf file when using eventdns.
4166 - Add an "EnforceDistinctSubnets" option to control our "exclude
4167 servers on the same /16" behavior. It's still on by default; this
4168 is mostly for people who want to operate private test networks with
4169 all the machines on the same subnet.
4170 - If one of our entry guards is on the ExcludeNodes list, or the
4171 directory authorities don't think it's a good guard, treat it as
4172 if it were unlisted: stop using it as a guard, and throw it off
4173 the guards list if it stays that way for a long time.
4174 - Allow directory authorities to be marked separately as authorities
4175 for the v1 directory protocol, the v2 directory protocol, and
4176 as hidden service directories, to make it easier to retire old
4177 authorities. V1 authorities should set "HSAuthoritativeDir 1"
4178 to continue being hidden service authorities too.
4179 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
4181 o Minor features, controller:
4182 - Fix CIRC controller events so that controllers can learn the
4183 identity digests of non-Named servers used in circuit paths.
4184 - Let controllers ask for more useful identifiers for servers. Instead
4185 of learning identity digests for un-Named servers and nicknames
4186 for Named servers, the new identifiers include digest, nickname,
4187 and indication of Named status. Off by default; see control-spec.txt
4188 for more information.
4189 - Add a "getinfo address" controller command so it can display Tor's
4190 best guess to the user.
4191 - New controller event to alert the controller when our server
4192 descriptor has changed.
4193 - Give more meaningful errors on controller authentication failure.
4195 o Minor features, other:
4196 - When asked to resolve a hostname, don't use non-exit servers unless
4197 requested to do so. This allows servers with broken DNS to be
4198 useful to the network.
4199 - Divide eventdns log messages into warn and info messages.
4200 - Reserve the nickname "Unnamed" for routers that can't pick
4201 a hostname: any router can call itself Unnamed; directory
4202 authorities will never allocate Unnamed to any particular router;
4203 clients won't believe that any router is the canonical Unnamed.
4204 - Only include function names in log messages for info/debug messages.
4205 For notice/warn/err, the content of the message should be clear on
4206 its own, and printing the function name only confuses users.
4207 - Avoid some false positives during reachability testing: don't try
4208 to test via a server that's on the same /24 as us.
4209 - If we fail to build a circuit to an intended enclave, and it's
4210 not mandatory that we use that enclave, stop wanting it.
4211 - When eventdns is enabled, allow multithreaded builds on NetBSD and
4212 OpenBSD. (We had previously disabled threads on these platforms
4213 because they didn't have working thread-safe resolver functions.)
4215 o Major bugfixes, anonymity/security:
4216 - If a client asked for a server by name, and there's a named server
4217 in our network-status but we don't have its descriptor yet, we
4218 could return an unnamed server instead.
4219 - Fix NetBSD bug that could allow someone to force uninitialized RAM
4220 to be sent to a server's DNS resolver. This only affects NetBSD
4221 and other platforms that do not bounds-check tolower().
4222 - Reject (most) attempts to use Tor circuits with length one. (If
4223 many people start using Tor as a one-hop proxy, exit nodes become
4224 a more attractive target for compromise.)
4225 - Just because your DirPort is open doesn't mean people should be
4226 able to remotely teach you about hidden service descriptors. Now
4227 only accept rendezvous posts if you've got HSAuthoritativeDir set.
4229 o Major bugfixes, other:
4230 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
4231 - When a client asks the server to resolve (not connect to)
4232 an address, and it has a cached answer, give them the cached answer.
4233 Previously, the server would give them no answer at all.
4234 - Allow really slow clients to not hang up five minutes into their
4235 directory downloads (suggested by Adam J. Richter).
4236 - We were building exactly the wrong circuits when we anticipated
4237 hidden service requirements, meaning Tor would have to build all
4238 its circuits on demand.
4239 - Avoid crashing when we mmap a router cache file of size 0.
4240 - When testing reachability of our DirPort, don't launch new
4241 tests when there's already one in progress -- unreachable
4242 servers were stacking up dozens of testing streams.
4244 o Minor bugfixes, correctness:
4245 - If we're a directory mirror and we ask for "all" network status
4246 documents, we would discard status documents from authorities
4248 - Avoid a memory corruption bug when creating a hash table for
4250 - Avoid controller-triggered crash when misusing certain commands
4251 from a v0 controller on platforms that do not handle
4252 printf("%s",NULL) gracefully.
4253 - Don't crash when a controller sends a third argument to an
4254 "extendcircuit" request.
4255 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4256 response; fix error code when "getinfo dir/status/" fails.
4257 - Avoid crash when telling controller stream-status and a stream
4259 - Patch from Adam Langley to fix assert() in eventdns.c.
4260 - Fix a debug log message in eventdns to say "X resolved to Y"
4261 instead of "X resolved to X".
4262 - Make eventdns give strings for DNS errors, not just error numbers.
4263 - Track unreachable entry guards correctly: don't conflate
4264 'unreachable by us right now' with 'listed as down by the directory
4265 authorities'. With the old code, if a guard was unreachable by
4266 us but listed as running, it would clog our guard list forever.
4267 - Behave correctly in case we ever have a network with more than
4268 2GB/s total advertised capacity.
4269 - Make TrackExitHosts case-insensitive, and fix the behavior of
4270 ".suffix" TrackExitHosts items to avoid matching in the middle of
4272 - Finally fix the openssl warnings from newer gccs that believe that
4273 ignoring a return value is okay, but casting a return value and
4274 then ignoring it is a sign of madness.
4275 - Prevent the contrib/exitlist script from printing the same
4276 result more than once.
4277 - Patch from Steve Hildrey: Generate network status correctly on
4278 non-versioning dirservers.
4279 - Don't listen to the X-Your-Address-Is hint if you did the lookup
4280 via Tor; otherwise you'll think you're the exit node's IP address.
4282 o Minor bugfixes, performance:
4283 - Two small performance improvements on parsing descriptors.
4284 - Major performance improvement on inserting descriptors: change
4285 algorithm from O(n^2) to O(n).
4286 - Make the common memory allocation path faster on machines where
4287 malloc(0) returns a pointer.
4288 - Start remembering X-Your-Address-Is directory hints even if you're
4289 a client, so you can become a server more smoothly.
4290 - Avoid duplicate entries on MyFamily line in server descriptor.
4292 o Packaging, features:
4293 - Remove architecture from OS X builds. The official builds are
4294 now universal binaries.
4295 - The Debian package now uses --verify-config when (re)starting,
4296 to distinguish configuration errors from other errors.
4297 - Update RPMs to require libevent 1.1b.
4299 o Packaging, bugfixes:
4300 - Patches so Tor builds with MinGW on Windows.
4301 - Patches so Tor might run on Cygwin again.
4302 - Resume building on non-gcc compilers and ancient gcc. Resume
4303 building with the -O0 compile flag. Resume building cleanly on
4305 - Run correctly on OS X platforms with case-sensitive filesystems.
4306 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
4307 - Add autoconf checks so Tor can build on Solaris x86 again.
4310 - Documented (and renamed) ServerDNSSearchDomains and
4311 ServerDNSResolvConfFile options.
4312 - Be clearer that the *ListenAddress directives can be repeated
4316 Changes in version 0.1.1.24 - 2006-09-29
4318 - Allow really slow clients to not hang up five minutes into their
4319 directory downloads (suggested by Adam J. Richter).
4320 - Fix major performance regression from 0.1.0.x: instead of checking
4321 whether we have enough directory information every time we want to
4322 do something, only check when the directory information has changed.
4323 This should improve client CPU usage by 25-50%.
4324 - Don't crash if, after a server has been running for a while,
4325 it can't resolve its hostname.
4328 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4329 - Don't crash when the controller receives a third argument to an
4330 "extendcircuit" request.
4331 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
4332 response; fix error code when "getinfo dir/status/" fails.
4333 - Fix configure.in to not produce broken configure files with
4334 more recent versions of autoconf. Thanks to Clint for his auto*
4336 - Fix security bug on NetBSD that could allow someone to force
4337 uninitialized RAM to be sent to a server's DNS resolver. This
4338 only affects NetBSD and other platforms that do not bounds-check
4340 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
4341 methods: these are known to be buggy.
4342 - If we're a directory mirror and we ask for "all" network status
4343 documents, we would discard status documents from authorities
4347 Changes in version 0.1.2.1-alpha - 2006-08-27
4349 - Add "eventdns" async dns library from Adam Langley, tweaked to
4350 build on OSX and Windows. Only enabled if you pass the
4351 --enable-eventdns argument to configure.
4352 - Allow servers with no hostname or IP address to learn their
4353 IP address by asking the directory authorities. This code only
4354 kicks in when you would normally have exited with a "no address"
4355 error. Nothing's authenticated, so use with care.
4356 - Rather than waiting a fixed amount of time between retrying
4357 application connections, we wait only 5 seconds for the first,
4358 10 seconds for the second, and 15 seconds for each retry after
4359 that. Hopefully this will improve the expected user experience.
4360 - Patch from Tup to add support for transparent AP connections:
4361 this basically bundles the functionality of trans-proxy-tor
4362 into the Tor mainline. Now hosts with compliant pf/netfilter
4363 implementations can redirect TCP connections straight to Tor
4364 without diverting through SOCKS. Needs docs.
4365 - Busy directory servers save lots of memory by spooling server
4366 descriptors, v1 directories, and v2 networkstatus docs to buffers
4367 as needed rather than en masse. Also mmap the cached-routers
4368 files, so we don't need to keep the whole thing in memory too.
4369 - Automatically avoid picking more than one node from the same
4370 /16 network when constructing a circuit.
4371 - Revise and clean up the torrc.sample that we ship with; add
4372 a section for BandwidthRate and BandwidthBurst.
4375 - Split circuit_t into origin_circuit_t and or_circuit_t, and
4376 split connection_t into edge, or, dir, control, and base structs.
4377 These will save quite a bit of memory on busy servers, and they'll
4378 also help us track down bugs in the code and bugs in the spec.
4379 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
4380 or later. Log when we are doing this, so we can diagnose it when
4381 it fails. (Also, recommend libevent 1.1b for kqueue and
4382 win32 methods; deprecate libevent 1.0b harder; make libevent
4383 recommendation system saner.)
4384 - Start being able to build universal binaries on OS X (thanks
4386 - Export the default exit policy via the control port, so controllers
4387 don't need to guess what it is / will be later.
4388 - Add a man page entry for ProtocolWarnings.
4389 - Add TestVia config option to the man page.
4390 - Remove even more protocol-related warnings from Tor server logs,
4391 such as bad TLS handshakes and malformed begin cells.
4392 - Stop fetching descriptors if you're not a dir mirror and you
4393 haven't tried to establish any circuits lately. [This currently
4394 causes some dangerous behavior, because when you start up again
4395 you'll use your ancient server descriptors.]
4396 - New DirPort behavior: if you have your dirport set, you download
4397 descriptors aggressively like a directory mirror, whether or not
4399 - Get rid of the router_retry_connections notion. Now routers
4400 no longer try to rebuild long-term connections to directory
4401 authorities, and directory authorities no longer try to rebuild
4402 long-term connections to all servers. We still don't hang up
4403 connections in these two cases though -- we need to look at it
4404 more carefully to avoid flapping, and we likely need to wait til
4405 0.1.1.x is obsolete.
4406 - Drop compatibility with obsolete Tors that permit create cells
4407 to have the wrong circ_id_type.
4408 - Re-enable per-connection rate limiting. Get rid of the "OP
4409 bandwidth" concept. Lay groundwork for "bandwidth classes" --
4410 separate global buckets that apply depending on what sort of conn
4412 - Start publishing one minute or so after we find our ORPort
4413 to be reachable. This will help reduce the number of descriptors
4414 we have for ourselves floating around, since it's quite likely
4415 other things (e.g. DirPort) will change during that minute too.
4416 - Fork the v1 directory protocol into its own spec document,
4417 and mark dir-spec.txt as the currently correct (v2) spec.
4420 - When we find our DirPort to be reachable, publish a new descriptor
4421 so we'll tell the world (reported by pnx).
4422 - Publish a new descriptor after we hup/reload. This is important
4423 if our config has changed such that we'll want to start advertising
4424 our DirPort now, etc.
4425 - Allow Tor to start when RunAsDaemon is set but no logs are set.
4426 - When we have a state file we cannot parse, tell the user and
4427 move it aside. Now we avoid situations where the user starts
4428 Tor in 1904, Tor writes a state file with that timestamp in it,
4429 the user fixes her clock, and Tor refuses to start.
4430 - Fix configure.in to not produce broken configure files with
4431 more recent versions of autoconf. Thanks to Clint for his auto*
4433 - "tor --verify-config" now exits with -1(255) or 0 depending on
4434 whether the config options are bad or good.
4435 - Resolve bug 321 when using dnsworkers: append a period to every
4436 address we resolve at the exit node, so that we do not accidentally
4437 pick up local addresses, and so that failing searches are retried
4438 in the resolver search domains. (This is already solved for
4439 eventdns.) (This breaks Blossom servers for now.)
4440 - If we are using an exit enclave and we can't connect, e.g. because
4441 its webserver is misconfigured to not listen on localhost, then
4442 back off and try connecting from somewhere else before we fail.
4445 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
4446 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
4447 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
4448 when the IP address is mapped through MapAddress to a hostname.
4449 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
4450 useless IPv6 DNS resolves.
4451 - Patch suggested by Karsten Loesing: respond to SIGNAL command
4452 before we execute the signal, in case the signal shuts us down.
4453 - Clean up AllowInvalidNodes man page entry.
4454 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
4455 - Add more asserts to track down an assert error on a windows Tor
4456 server with connection_add being called with socket == -1.
4457 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
4458 - Fix misleading log messages: an entry guard that is "unlisted",
4459 as well as not known to be "down" (because we've never heard
4460 of it), is not therefore "up".
4461 - Remove code to special-case "-cvs" ending, since it has not
4462 actually mattered since 0.0.9.
4463 - Make our socks5 handling more robust to broken socks clients:
4464 throw out everything waiting on the buffer in between socks
4465 handshake phases, since they can't possibly (so the theory
4466 goes) have predicted what we plan to respond to them.
4469 Changes in version 0.1.1.23 - 2006-07-30
4471 - Fast Tor servers, especially exit nodes, were triggering asserts
4472 due to a bug in handling the list of pending DNS resolves. Some
4473 bugs still remain here; we're hunting them.
4474 - Entry guards could crash clients by sending unexpected input.
4475 - More fixes on reachability testing: if you find yourself reachable,
4476 then don't ever make any client requests (so you stop predicting
4477 circuits), then hup or have your clock jump, then later your IP
4478 changes, you won't think circuits are working, so you won't try to
4479 test reachability, so you won't publish.
4482 - Avoid a crash if the controller does a resetconf firewallports
4483 and then a setconf fascistfirewall=1.
4484 - Avoid an integer underflow when the dir authority decides whether
4485 a router is stable: we might wrongly label it stable, and compute
4486 a slightly wrong median stability, when a descriptor is published
4488 - Fix a place where we might trigger an assert if we can't build our
4489 own server descriptor yet.
4492 Changes in version 0.1.1.22 - 2006-07-05
4494 - Fix a big bug that was causing servers to not find themselves
4495 reachable if they changed IP addresses. Since only 0.1.1.22+
4496 servers can do reachability testing correctly, now we automatically
4497 make sure to test via one of these.
4498 - Fix to allow clients and mirrors to learn directory info from
4499 descriptor downloads that get cut off partway through.
4500 - Directory authorities had a bug in deciding if a newly published
4501 descriptor was novel enough to make everybody want a copy -- a few
4502 servers seem to be publishing new descriptors many times a minute.
4504 - Fix a rare bug that was causing some servers to complain about
4505 "closing wedged cpuworkers" and skip some circuit create requests.
4506 - Make the Exit flag in directory status documents actually work.
4509 Changes in version 0.1.1.21 - 2006-06-10
4510 o Crash and assert fixes from 0.1.1.20:
4511 - Fix a rare crash on Tor servers that have enabled hibernation.
4512 - Fix a seg fault on startup for Tor networks that use only one
4513 directory authority.
4514 - Fix an assert from a race condition that occurs on Tor servers
4515 while exiting, where various threads are trying to log that they're
4516 exiting, and delete the logs, at the same time.
4517 - Make our unit tests pass again on certain obscure platforms.
4520 - Add support for building SUSE RPM packages.
4521 - Speed up initial bootstrapping for clients: if we are making our
4522 first ever connection to any entry guard, then don't mark it down
4524 - When only one Tor server in the network is labelled as a guard,
4525 and we've already picked him, we would cycle endlessly picking him
4526 again, being unhappy about it, etc. Now we specifically exclude
4527 current guards when picking a new guard.
4528 - Servers send create cells more reliably after the TLS connection
4529 is established: we were sometimes forgetting to send half of them
4530 when we had more than one pending.
4531 - If we get a create cell that asks us to extend somewhere, but the
4532 Tor server there doesn't match the expected digest, we now send
4533 a destroy cell back, rather than silently doing nothing.
4534 - Make options->RedirectExit work again.
4535 - Make cookie authentication for the controller work again.
4536 - Stop being picky about unusual characters in the arguments to
4537 mapaddress. It's none of our business.
4538 - Add a new config option "TestVia" that lets you specify preferred
4539 middle hops to use for test circuits. Perhaps this will let me
4540 debug the reachability problems better.
4542 o Log / documentation fixes:
4543 - If we're a server and some peer has a broken TLS certificate, don't
4544 log about it unless ProtocolWarnings is set, i.e., we want to hear
4545 about protocol violations by others.
4546 - Fix spelling of VirtualAddrNetwork in man page.
4547 - Add a better explanation at the top of the autogenerated torrc file
4548 about what happened to our old torrc.
4551 Changes in version 0.1.1.20 - 2006-05-23
4553 - Downgrade a log severity where servers complain that they're
4555 - Avoid a compile warning on FreeBSD.
4556 - Remove string size limit on NEWDESC messages; solve bug 291.
4557 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
4558 more thoroughly when we're running on windows.
4561 Changes in version 0.1.1.19-rc - 2006-05-03
4563 - Regenerate our local descriptor if it's dirty and we try to use
4564 it locally (e.g. if it changes during reachability detection).
4565 - If we setconf our ORPort to 0, we continued to listen on the
4566 old ORPort and receive connections.
4567 - Avoid a second warning about machine/limits.h on Debian
4569 - Be willing to add our own routerinfo into the routerlist.
4570 Now authorities will include themselves in their directories
4571 and network-statuses.
4572 - Stop trying to upload rendezvous descriptors to every
4573 directory authority: only try the v1 authorities.
4574 - Servers no longer complain when they think they're not
4575 registered with the directory authorities. There were too many
4577 - Backport dist-rpm changes so rpms can be built without errors.
4580 - Implement an option, VirtualAddrMask, to set which addresses
4581 get handed out in response to mapaddress requests. This works
4582 around a bug in tsocks where 127.0.0.0/8 is never socksified.
4585 Changes in version 0.1.1.18-rc - 2006-04-10
4587 - Work harder to download live network-statuses from all the
4588 directory authorities we know about. Improve the threshold
4589 decision logic so we're more robust to edge cases.
4590 - When fetching rendezvous descriptors, we were willing to ask
4591 v2 authorities too, which would always return 404.
4594 - Stop listing down or invalid nodes in the v1 directory. This will
4595 reduce its bulk by about 1/3, and reduce load on directory
4597 - When deciding whether a router is Fast or Guard-worthy, consider
4598 his advertised BandwidthRate and not just the BandwidthCapacity.
4599 - No longer ship INSTALL and README files -- they are useless now.
4600 - Force rpmbuild to behave and honor target_cpu.
4601 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
4602 - Start to include translated versions of the tor-doc-*.html
4603 files, along with the screenshots. Still needs more work.
4604 - Start sending back 512 and 451 errors if mapaddress fails,
4605 rather than not sending anything back at all.
4606 - When we fail to bind or listen on an incoming or outgoing
4607 socket, we should close it before failing. otherwise we just
4608 leak it. (thanks to weasel for finding.)
4609 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
4610 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
4611 - Make NoPublish (even though deprecated) work again.
4612 - Fix a minor security flaw where a versioning auth dirserver
4613 could list a recommended version many times in a row to make
4614 clients more convinced that it's recommended.
4615 - Fix crash bug if there are two unregistered servers running
4616 with the same nickname, one of them is down, and you ask for
4617 them by nickname in your EntryNodes or ExitNodes. Also, try
4618 to pick the one that's running rather than an arbitrary one.
4619 - Fix an infinite loop we could hit if we go offline for too long.
4620 - Complain when we hit WSAENOBUFS on recv() or write() too.
4621 Perhaps this will help us hunt the bug.
4622 - If you're not a versioning dirserver, don't put the string
4623 "client-versions \nserver-versions \n" in your network-status.
4624 - Lower the minimum required number of file descriptors to 1000,
4625 so we can have some overhead for Valgrind on Linux, where the
4626 default ulimit -n is 1024.
4629 - Add tor.dizum.com as the fifth authoritative directory server.
4630 - Add a new config option FetchUselessDescriptors, off by default,
4631 for when you plan to run "exitlist" on your client and you want
4632 to know about even the non-running descriptors.
4635 Changes in version 0.1.1.17-rc - 2006-03-28
4637 - Clients and servers since 0.1.1.10-alpha have been expiring
4638 connections whenever they are idle for 5 minutes and they *do*
4639 have circuits on them. Oops. With this new version, clients will
4640 discard their previous entry guard choices and avoid choosing
4641 entry guards running these flawed versions.
4642 - Fix memory leak when uncompressing concatenated zlib streams. This
4643 was causing substantial leaks over time on Tor servers.
4644 - The v1 directory was including servers as much as 48 hours old,
4645 because that's how the new routerlist->routers works. Now only
4646 include them if they're 20 hours old or less.
4649 - Resume building on irix64, netbsd 2.0, etc.
4650 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
4652 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
4653 and it is confusing some users.
4654 - Mirrors stop caching the v1 directory so often.
4655 - Make the max number of old descriptors that a cache will hold
4656 rise with the number of directory authorities, so we can scale.
4657 - Change our win32 uname() hack to be more forgiving about what
4658 win32 versions it thinks it's found.
4661 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
4663 - When the controller's *setconf commands fail, collect an error
4664 message in a string and hand it back to the controller.
4665 - Make the v2 dir's "Fast" flag based on relative capacity, just
4666 like "Stable" is based on median uptime. Name everything in the
4667 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
4668 - Log server fingerprint on startup, so new server operators don't
4669 have to go hunting around their filesystem for it.
4670 - Return a robots.txt on our dirport to discourage google indexing.
4671 - Let the controller ask for GETINFO dir/status/foo so it can ask
4672 directly rather than connecting to the dir port. Only works when
4673 dirport is set for now.
4675 o New config options rather than constants in the code:
4676 - SocksTimeout: How long do we let a socks connection wait
4677 unattached before we fail it?
4678 - CircuitBuildTimeout: Cull non-open circuits that were born
4679 at least this many seconds ago.
4680 - CircuitIdleTimeout: Cull open clean circuits that were born
4681 at least this many seconds ago.
4684 Changes in version 0.1.1.16-rc - 2006-03-18
4685 o Bugfixes on 0.1.1.15-rc:
4686 - Fix assert when the controller asks to attachstream a connect-wait
4687 or resolve-wait stream.
4688 - Now do address rewriting when the controller asks us to attach
4689 to a particular circuit too. This will let Blossom specify
4690 "moria2.exit" without having to learn what moria2's IP address is.
4691 - Make the "tor --verify-config" command-line work again, so people
4692 can automatically check if their torrc will parse.
4693 - Authoritative dirservers no longer require an open connection from
4694 a server to consider him "reachable". We need this change because
4695 when we add new auth dirservers, old servers won't know not to
4697 - Let Tor build on Sun CC again.
4698 - Fix an off-by-one buffer size in dirserv.c that magically never
4699 hit our three authorities but broke sjmurdoch's own tor network.
4700 - If we as a directory mirror don't know of any v1 directory
4701 authorities, then don't try to cache any v1 directories.
4702 - Stop warning about unknown servers in our family when they are
4703 given as hex digests.
4704 - Stop complaining as quickly to the server operator that he
4705 hasn't registered his nickname/key binding.
4706 - Various cleanups so we can add new V2 Auth Dirservers.
4707 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
4708 reflect the updated flags in our v2 dir protocol.
4709 - Resume allowing non-printable characters for exit streams (both
4710 for connecting and for resolving). Now we tolerate applications
4711 that don't follow the RFCs. But continue to block malformed names
4714 o Bugfixes on 0.1.0.x:
4715 - Fix assert bug in close_logs(): when we close and delete logs,
4716 remove them all from the global "logfiles" list.
4717 - Fix minor integer overflow in calculating when we expect to use up
4718 our bandwidth allocation before hibernating.
4719 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
4720 there are multiple SSLs installed with different versions.
4721 - When we try to be a server and Address is not explicitly set and
4722 our hostname resolves to a private IP address, try to use an
4723 interface address if it has a public address. Now Windows machines
4724 that think of themselves as localhost can work by default.
4727 - Let the controller ask for GETINFO dir/server/foo so it can ask
4728 directly rather than connecting to the dir port.
4729 - Let the controller tell us about certain router descriptors
4730 that it doesn't want Tor to use in circuits. Implement
4731 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
4732 - New config option SafeSocks to reject all application connections
4733 using unsafe socks protocols. Defaults to off.
4736 Changes in version 0.1.1.15-rc - 2006-03-11
4737 o Bugfixes and cleanups:
4738 - When we're printing strings from the network, don't try to print
4739 non-printable characters. This protects us against shell escape
4740 sequence exploits, and also against attacks to fool humans into
4741 misreading their logs.
4742 - Fix a bug where Tor would fail to establish any connections if you
4743 left it off for 24 hours and then started it: we were happy with
4744 the obsolete network statuses, but they all referred to router
4745 descriptors that were too old to fetch, so we ended up with no
4746 valid router descriptors.
4747 - Fix a seg fault in the controller's "getinfo orconn-status"
4748 command while listing status on incoming handshaking connections.
4749 Introduce a status name "NEW" for these connections.
4750 - If we get a linelist or linelist_s config option from the torrc
4751 (e.g. ExitPolicy) and it has no value, warn and skip rather than
4752 silently resetting it to its default.
4753 - Don't abandon entry guards until they've been down or gone for
4755 - Cleaner and quieter log messages.
4758 - New controller signal NEWNYM that makes new application requests
4760 - Add a new circuit purpose 'controller' to let the controller ask
4761 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
4762 controller command to let you specify the purpose if you're
4763 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
4764 command to let you change a circuit's purpose after it's been
4766 - Accept "private:*" in routerdesc exit policies; not generated yet
4767 because older Tors do not understand it.
4768 - Add BSD-style contributed startup script "rc.subr" from Peter
4772 Changes in version 0.1.1.14-alpha - 2006-02-20
4773 o Bugfixes on 0.1.1.x:
4774 - Don't die if we ask for a stdout or stderr log (even implicitly)
4775 and we're set to RunAsDaemon -- just warn.
4776 - We still had a few bugs in the OR connection rotation code that
4777 caused directory servers to slowly aggregate connections to other
4778 fast Tor servers. This time for sure!
4779 - Make log entries on Win32 include the name of the function again.
4780 - We were treating a pair of exit policies if they were equal even
4781 if one said accept and the other said reject -- causing us to
4782 not always publish a new descriptor since we thought nothing
4784 - Retry pending server downloads as well as pending networkstatus
4785 downloads when we unexpectedly get a socks request.
4786 - We were ignoring the IS_FAST flag in the directory status,
4787 meaning we were willing to pick trivial-bandwidth nodes for "fast"
4789 - If the controller's SAVECONF command fails (e.g. due to file
4790 permissions), let the controller know that it failed.
4793 - If we're trying to be a Tor server and running Windows 95/98/ME
4794 as a server, explain that we'll likely crash.
4795 - When we're a server, a client asks for an old-style directory,
4796 and our write bucket is empty, don't give it to him. This way
4797 small servers can continue to serve the directory *sometimes*,
4798 without getting overloaded.
4799 - Compress exit policies even more -- look for duplicate lines
4801 - Clients now honor the "guard" flag in the router status when
4802 picking entry guards, rather than looking at is_fast or is_stable.
4803 - Retain unrecognized lines in $DATADIR/state file, so that we can
4804 be forward-compatible.
4805 - Generate 18.0.0.0/8 address policy format in descs when we can;
4806 warn when the mask is not reducible to a bit-prefix.
4807 - Let the user set ControlListenAddress in the torrc. This can be
4808 dangerous, but there are some cases (like a secured LAN) where it
4810 - Split ReachableAddresses into ReachableDirAddresses and
4811 ReachableORAddresses, so we can restrict Dir conns to port 80
4812 and OR conns to port 443.
4813 - Now we can target arch and OS in rpm builds (contributed by
4814 Phobos). Also make the resulting dist-rpm filename match the
4816 - New config options to help controllers: FetchServerDescriptors
4817 and FetchHidServDescriptors for whether to fetch server
4818 info and hidserv info or let the controller do it, and
4819 PublishServerDescriptor and PublishHidServDescriptors.
4820 - Also let the controller set the __AllDirActionsPrivate config
4821 option if you want all directory fetches/publishes to happen via
4822 Tor (it assumes your controller bootstraps your circuits).
4825 Changes in version 0.1.0.17 - 2006-02-17
4826 o Crash bugfixes on 0.1.0.x:
4827 - When servers with a non-zero DirPort came out of hibernation,
4828 sometimes they would trigger an assert.
4830 o Other important bugfixes:
4831 - On platforms that don't have getrlimit (like Windows), we were
4832 artificially constraining ourselves to a max of 1024
4833 connections. Now just assume that we can handle as many as 15000
4834 connections. Hopefully this won't cause other problems.
4836 o Backported features:
4837 - When we're a server, a client asks for an old-style directory,
4838 and our write bucket is empty, don't give it to him. This way
4839 small servers can continue to serve the directory *sometimes*,
4840 without getting overloaded.
4841 - Whenever you get a 503 in response to a directory fetch, try
4842 once more. This will become important once servers start sending
4843 503's whenever they feel busy.
4844 - Fetch a new directory every 120 minutes, not every 40 minutes.
4845 Now that we have hundreds of thousands of users running the old
4846 directory algorithm, it's starting to hurt a lot.
4847 - Bump up the period for forcing a hidden service descriptor upload
4848 from 20 minutes to 1 hour.
4851 Changes in version 0.1.1.13-alpha - 2006-02-09
4852 o Crashes in 0.1.1.x:
4853 - When you tried to setconf ORPort via the controller, Tor would
4854 crash. So people using TorCP to become a server were sad.
4855 - Solve (I hope) the stack-smashing bug that we were seeing on fast
4856 servers. The problem appears to be something do with OpenSSL's
4857 random number generation, or how we call it, or something. Let me
4858 know if the crashes continue.
4859 - Turn crypto hardware acceleration off by default, until we find
4860 somebody smart who can test it for us. (It appears to produce
4861 seg faults in at least some cases.)
4862 - Fix a rare assert error when we've tried all intro points for
4863 a hidden service and we try fetching the service descriptor again:
4864 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
4867 - Fix a major load balance bug: we were round-robining in 16 KB
4868 chunks, and servers with bandwidthrate of 20 KB, while downloading
4869 a 600 KB directory, would starve their other connections. Now we
4870 try to be a bit more fair.
4871 - Dir authorities and mirrors were never expiring the newest
4872 descriptor for each server, causing memory and directory bloat.
4873 - Fix memory-bloating and connection-bloating bug on servers: We
4874 were never closing any connection that had ever had a circuit on
4875 it, because we were checking conn->n_circuits == 0, yet we had a
4876 bug that let it go negative.
4877 - Make Tor work using squid as your http proxy again -- squid
4878 returns an error if you ask for a URL that's too long, and it uses
4879 a really generic error message. Plus, many people are behind a
4880 transparent squid so they don't even realize it.
4881 - On platforms that don't have getrlimit (like Windows), we were
4882 artificially constraining ourselves to a max of 1024
4883 connections. Now just assume that we can handle as many as 15000
4884 connections. Hopefully this won't cause other problems.
4885 - Add a new config option ExitPolicyRejectPrivate which defaults to
4886 1. This means all exit policies will begin with rejecting private
4887 addresses, unless the server operator explicitly turns it off.
4890 - Clients no longer download descriptors for non-running
4892 - Before we add new directory authorities, we should make it
4893 clear that only v1 authorities should receive/publish hidden
4894 service descriptors.
4897 - As soon as we've fetched some more directory info, immediately
4898 try to download more server descriptors. This way we don't have
4899 a 10 second pause during initial bootstrapping.
4900 - Remove even more loud log messages that the server operator can't
4902 - When we're running an obsolete or un-recommended version, make
4903 the log message more clear about what the problem is and what
4904 versions *are* still recommended.
4905 - Provide a more useful warn message when our onion queue gets full:
4906 the CPU is too slow or the exit policy is too liberal.
4907 - Don't warn when we receive a 503 from a dirserver/cache -- this
4908 will pave the way for them being able to refuse if they're busy.
4909 - When we fail to bind a listener, try to provide a more useful
4910 log message: e.g., "Is Tor already running?"
4911 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
4912 Goldberg can prove things about our handshake protocol more
4914 - MaxConn has been obsolete for a while now. Document the ConnLimit
4915 config option, which is a *minimum* number of file descriptors
4916 that must be available else Tor refuses to start.
4917 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
4918 if you log to syslog and want something other than LOG_DAEMON.
4919 - Make dirservers generate a separate "guard" flag to mean,
4920 "would make a good entry guard". Make clients parse it and vote
4921 on it. Not used by clients yet.
4922 - Implement --with-libevent-dir option to ./configure. Also, improve
4923 search techniques to find libevent, and use those for openssl too.
4924 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
4925 - Only start testing reachability once we've established a
4926 circuit. This will make startup on dirservers less noisy.
4927 - Don't try to upload hidden service descriptors until we have
4928 established a circuit.
4929 - Fix the controller's "attachstream 0" command to treat conn like
4930 it just connected, doing address remapping, handling .exit and
4931 .onion idioms, and so on. Now we're more uniform in making sure
4932 that the controller hears about new and closing connections.
4935 Changes in version 0.1.1.12-alpha - 2006-01-11
4936 o Bugfixes on 0.1.1.x:
4937 - The fix to close duplicate server connections was closing all
4938 Tor client connections if they didn't establish a circuit
4939 quickly enough. Oops.
4940 - Fix minor memory issue (double-free) that happened on exit.
4942 o Bugfixes on 0.1.0.x:
4943 - Tor didn't warn when it failed to open a log file.
4946 Changes in version 0.1.1.11-alpha - 2006-01-10
4947 o Crashes in 0.1.1.x:
4948 - Include all the assert/crash fixes from 0.1.0.16.
4949 - If you start Tor and then quit very quickly, there were some
4950 races that tried to free things that weren't allocated yet.
4951 - Fix a rare memory stomp if you're running hidden services.
4952 - Fix segfault when specifying DirServer in config without nickname.
4953 - Fix a seg fault when you finish connecting to a server but at
4954 that moment you dump his server descriptor.
4955 - Extendcircuit and Attachstream controller commands would
4956 assert/crash if you don't give them enough arguments.
4957 - Fix an assert error when we're out of space in the connection_list
4958 and we try to post a hidden service descriptor (reported by weasel).
4959 - If you specify a relative torrc path and you set RunAsDaemon in
4960 your torrc, then it chdir()'s to the new directory. If you HUP,
4961 it tries to load the new torrc location, fails, and exits.
4962 The fix: no longer allow a relative path to torrc using -f.
4965 - Implement "entry guards": automatically choose a handful of entry
4966 nodes and stick with them for all circuits. Only pick new guards
4967 when the ones you have are unsuitable, and if the old guards
4968 become suitable again, switch back. This will increase security
4969 dramatically against certain end-point attacks. The EntryNodes
4970 config option now provides some hints about which entry guards you
4971 want to use most; and StrictEntryNodes means to only use those.
4972 - New directory logic: download by descriptor digest, not by
4973 fingerprint. Caches try to download all listed digests from
4974 authorities; clients try to download "best" digests from caches.
4975 This avoids partitioning and isolating attacks better.
4976 - Make the "stable" router flag in network-status be the median of
4977 the uptimes of running valid servers, and make clients pay
4978 attention to the network-status flags. Thus the cutoff adapts
4979 to the stability of the network as a whole, making IRC, IM, etc
4980 connections more reliable.
4983 - Tor servers with dynamic IP addresses were needing to wait 18
4984 hours before they could start doing reachability testing using
4985 the new IP address and ports. This is because they were using
4986 the internal descriptor to learn what to test, yet they were only
4987 rebuilding the descriptor once they decided they were reachable.
4988 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
4989 to download certain server descriptors, throw them away, and then
4990 fetch them again after 30 minutes. Now mirrors throw away these
4991 server descriptors so clients can't get them.
4992 - We were leaving duplicate connections to other ORs open for a week,
4993 rather than closing them once we detect a duplicate. This only
4994 really affected authdirservers, but it affected them a lot.
4995 - Spread the authdirservers' reachability testing over the entire
4996 testing interval, so we don't try to do 500 TLS's at once every
5000 - If the network is down, and we try to connect to a conn because
5001 we have a circuit in mind, and we timeout (30 seconds) because the
5002 network never answers, we were expiring the circuit, but we weren't
5003 obsoleting the connection or telling the entry_guards functions.
5004 - Some Tor servers process billions of cells per day. These statistics
5005 need to be uint64_t's.
5006 - Check for integer overflows in more places, when adding elements
5007 to smartlists. This could possibly prevent a buffer overflow
5008 on malicious huge inputs. I don't see any, but I haven't looked
5010 - ReachableAddresses kept growing new "reject *:*" lines on every
5012 - When you "setconf log" via the controller, it should remove all
5013 logs. We were automatically adding back in a "log notice stdout".
5014 - Newly bootstrapped Tor networks couldn't establish hidden service
5015 circuits until they had nodes with high uptime. Be more tolerant.
5016 - We were marking servers down when they could not answer every piece
5017 of the directory request we sent them. This was far too harsh.
5018 - Fix the torify (tsocks) config file to not use Tor for localhost
5020 - Directory authorities now go to the proper authority when asking for
5021 a networkstatus, even when they want a compressed one.
5022 - Fix a harmless bug that was causing Tor servers to log
5023 "Got an end because of misc error, but we're not an AP. Closing."
5024 - Authorities were treating their own descriptor changes as cosmetic,
5025 meaning the descriptor available in the network-status and the
5026 descriptor that clients downloaded were different.
5027 - The OS X installer was adding a symlink for tor_resolve but
5028 the binary was called tor-resolve (reported by Thomas Hardly).
5029 - Workaround a problem with some http proxies where they refuse GET
5030 requests that specify "Content-Length: 0" (reported by Adrian).
5031 - Fix wrong log message when you add a "HiddenServiceNodes" config
5032 line without any HiddenServiceDir line (reported by Chris Thomas).
5035 - Write the TorVersion into the state file so we have a prayer of
5036 keeping forward and backward compatibility.
5037 - Revive the FascistFirewall config option rather than eliminating it:
5038 now it's a synonym for ReachableAddresses *:80,*:443.
5039 - Clients choose directory servers from the network status lists,
5040 not from their internal list of router descriptors. Now they can
5041 go to caches directly rather than needing to go to authorities
5043 - Directory authorities ignore router descriptors that have only
5044 cosmetic differences: do this for 0.1.0.x servers now too.
5045 - Add a new flag to network-status indicating whether the server
5046 can answer v2 directory requests too.
5047 - Authdirs now stop whining so loudly about bad descriptors that
5048 they fetch from other dirservers. So when there's a log complaint,
5049 it's for sure from a freshly uploaded descriptor.
5050 - Reduce memory requirements in our structs by changing the order
5052 - There used to be two ways to specify your listening ports in a
5053 server descriptor: on the "router" line and with a separate "ports"
5054 line. Remove support for the "ports" line.
5055 - New config option "AuthDirRejectUnlisted" for auth dirservers as
5056 a panic button: if we get flooded with unusable servers we can
5057 revert to only listing servers in the approved-routers file.
5058 - Auth dir servers can now mark a fingerprint as "!reject" or
5059 "!invalid" in the approved-routers file (as its nickname), to
5060 refuse descriptors outright or include them but marked as invalid.
5061 - Servers store bandwidth history across restarts/crashes.
5062 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
5063 get a better idea of why their circuits failed. Not used yet.
5064 - Directory mirrors now cache up to 16 unrecognized network-status
5065 docs. Now we can add new authdirservers and they'll be cached too.
5066 - When picking a random directory, prefer non-authorities if any
5068 - New controller option "getinfo desc/all-recent" to fetch the
5069 latest server descriptor for every router that Tor knows about.
5072 Changes in version 0.1.0.16 - 2006-01-02
5073 o Crash bugfixes on 0.1.0.x:
5074 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5075 corrupting the heap, losing FDs, or crashing when we need to resize
5076 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5077 - It turns out sparc64 platforms crash on unaligned memory access
5078 too -- so detect and avoid this.
5079 - Handle truncated compressed data correctly (by detecting it and
5081 - Fix possible-but-unlikely free(NULL) in control.c.
5082 - When we were closing connections, there was a rare case that
5083 stomped on memory, triggering seg faults and asserts.
5084 - Avoid potential infinite recursion when building a descriptor. (We
5085 don't know that it ever happened, but better to fix it anyway.)
5086 - We were neglecting to unlink marked circuits from soon-to-close OR
5087 connections, which caused some rare scribbling on freed memory.
5088 - Fix a memory stomping race bug when closing the joining point of two
5089 rendezvous circuits.
5090 - Fix an assert in time parsing found by Steven Murdoch.
5092 o Other bugfixes on 0.1.0.x:
5093 - When we're doing reachability testing, provide more useful log
5094 messages so the operator knows what to expect.
5095 - Do not check whether DirPort is reachable when we are suppressing
5096 advertising it because of hibernation.
5097 - When building with -static or on Solaris, we sometimes needed -ldl.
5098 - When we're deciding whether a stream has enough circuits around
5099 that can handle it, count the freshly dirty ones and not the ones
5100 that are so dirty they won't be able to handle it.
5101 - When we're expiring old circuits, we had a logic error that caused
5102 us to close new rendezvous circuits rather than old ones.
5103 - Give a more helpful log message when you try to change ORPort via
5104 the controller: you should upgrade Tor if you want that to work.
5105 - We were failing to parse Tor versions that start with "Tor ".
5106 - Tolerate faulty streams better: when a stream fails for reason
5107 exitpolicy, stop assuming that the router is lying about his exit
5108 policy. When a stream fails for reason misc, allow it to retry just
5109 as if it was resolvefailed. When a stream has failed three times,
5110 reset its failure count so we can try again and get all three tries.
5113 Changes in version 0.1.1.10-alpha - 2005-12-11
5114 o Correctness bugfixes on 0.1.0.x:
5115 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
5116 corrupting the heap, losing FDs, or crashing when we need to resize
5117 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
5118 - Stop doing the complex voodoo overkill checking for insecure
5119 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
5120 - When we were closing connections, there was a rare case that
5121 stomped on memory, triggering seg faults and asserts.
5122 - We were neglecting to unlink marked circuits from soon-to-close OR
5123 connections, which caused some rare scribbling on freed memory.
5124 - When we're deciding whether a stream has enough circuits around
5125 that can handle it, count the freshly dirty ones and not the ones
5126 that are so dirty they won't be able to handle it.
5127 - Recover better from TCP connections to Tor servers that are
5128 broken but don't tell you (it happens!); and rotate TLS
5129 connections once a week.
5130 - When we're expiring old circuits, we had a logic error that caused
5131 us to close new rendezvous circuits rather than old ones.
5132 - Fix a scary-looking but apparently harmless bug where circuits
5133 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
5134 servers, and never switch to state CIRCUIT_STATE_OPEN.
5135 - When building with -static or on Solaris, we sometimes needed to
5137 - Give a useful message when people run Tor as the wrong user,
5138 rather than telling them to start chowning random directories.
5139 - We were failing to inform the controller about new .onion streams.
5141 o Security bugfixes on 0.1.0.x:
5142 - Refuse server descriptors if the fingerprint line doesn't match
5143 the included identity key. Tor doesn't care, but other apps (and
5144 humans) might actually be trusting the fingerprint line.
5145 - We used to kill the circuit when we receive a relay command we
5146 don't recognize. Now we just drop it.
5147 - Start obeying our firewall options more rigorously:
5148 . If we can't get to a dirserver directly, try going via Tor.
5149 . Don't ever try to connect (as a client) to a place our
5150 firewall options forbid.
5151 . If we specify a proxy and also firewall options, obey the
5152 firewall options even when we're using the proxy: some proxies
5153 can only proxy to certain destinations.
5154 - Fix a bug found by Lasse Overlier: when we were making internal
5155 circuits (intended to be cannibalized later for rendezvous and
5156 introduction circuits), we were picking them so that they had
5157 useful exit nodes. There was no need for this, and it actually
5158 aids some statistical attacks.
5159 - Start treating internal circuits and exit circuits separately.
5160 It's important to keep them separate because internal circuits
5161 have their last hops picked like middle hops, rather than like
5162 exit hops. So exiting on them will break the user's expectations.
5164 o Bugfixes on 0.1.1.x:
5165 - Take out the mis-feature where we tried to detect IP address
5166 flapping for people with DynDNS, and chose not to upload a new
5167 server descriptor sometimes.
5168 - Try to be compatible with OpenSSL 0.9.6 again.
5169 - Log fix: when the controller is logging about .onion addresses,
5170 sometimes it didn't include the ".onion" part of the address.
5171 - Don't try to modify options->DirServers internally -- if the
5172 user didn't specify any, just add the default ones directly to
5173 the trusted dirserver list. This fixes a bug where people running
5174 controllers would use SETCONF on some totally unrelated config
5175 option, and Tor would start yelling at them about changing their
5177 - Let the controller's redirectstream command specify a port, in
5178 case the controller wants to change that too.
5179 - When we requested a pile of server descriptors, we sometimes
5180 accidentally launched a duplicate request for the first one.
5181 - Bugfix for trackhostexits: write down the fingerprint of the
5182 chosen exit, not its nickname, because the chosen exit might not
5184 - When parsing foo.exit, if foo is unknown, and we are leaving
5185 circuits unattached, set the chosen_exit field and leave the
5186 address empty. This matters because controllers got confused
5188 - Directory authorities no longer try to download server
5189 descriptors that they know they will reject.
5191 o Features and updates:
5192 - Replace balanced trees with hash tables: this should make stuff
5193 significantly faster.
5194 - Resume using the AES counter-mode implementation that we ship,
5195 rather than OpenSSL's. Ours is significantly faster.
5196 - Many other CPU and memory improvements.
5197 - Add a new config option FastFirstHopPK (on by default) so clients
5198 do a trivial crypto handshake for their first hop, since TLS has
5199 already taken care of confidentiality and authentication.
5200 - Add a new config option TestSocks so people can see if their
5201 applications are using socks4, socks4a, socks5-with-ip, or
5202 socks5-with-hostname. This way they don't have to keep mucking
5203 with tcpdump and wondering if something got cached somewhere.
5204 - Warn when listening on a public address for socks. I suspect a
5205 lot of people are setting themselves up as open socks proxies,
5206 and they have no idea that jerks on the Internet are using them,
5207 since they simply proxy the traffic into the Tor network.
5208 - Add "private:*" as an alias in configuration for policies. Now
5209 you can simplify your exit policy rather than needing to list
5210 every single internal or nonroutable network space.
5211 - Add a new controller event type that allows controllers to get
5212 all server descriptors that were uploaded to a router in its role
5213 as authoritative dirserver.
5214 - Start shipping socks-extensions.txt, tor-doc-unix.html,
5215 tor-doc-server.html, and stylesheet.css in the tarball.
5216 - Stop shipping tor-doc.html in the tarball.
5219 Changes in version 0.1.1.9-alpha - 2005-11-15
5220 o Usability improvements:
5221 - Start calling it FooListenAddress rather than FooBindAddress,
5222 since few of our users know what it means to bind an address
5224 - Reduce clutter in server logs. We're going to try to make
5225 them actually usable now. New config option ProtocolWarnings that
5226 lets you hear about how _other Tors_ are breaking the protocol. Off
5228 - Divide log messages into logging domains. Once we put some sort
5229 of interface on this, it will let people looking at more verbose
5230 log levels specify the topics they want to hear more about.
5231 - Make directory servers return better http 404 error messages
5232 instead of a generic "Servers unavailable".
5233 - Check for even more Windows version flags when writing the platform
5234 string in server descriptors, and note any we don't recognize.
5235 - Clean up more of the OpenSSL memory when exiting, so we can detect
5236 memory leaks better.
5237 - Make directory authorities be non-versioning, non-naming by
5238 default. Now we can add new directory servers without requiring
5239 their operators to pay close attention.
5240 - When logging via syslog, include the pid whenever we provide
5241 a log entry. Suggested by Todd Fries.
5243 o Performance improvements:
5244 - Directory servers now silently throw away new descriptors that
5245 haven't changed much if the timestamps are similar. We do this to
5246 tolerate older Tor servers that upload a new descriptor every 15
5247 minutes. (It seemed like a good idea at the time.)
5248 - Inline bottleneck smartlist functions; use fast versions by default.
5249 - Add a "Map from digest to void*" abstraction digestmap_t so we
5250 can do less hex encoding/decoding. Use it in router_get_by_digest()
5251 to resolve a performance bottleneck.
5252 - Allow tor_gzip_uncompress to extract as much as possible from
5253 truncated compressed data. Try to extract as many
5254 descriptors as possible from truncated http responses (when
5255 DIR_PURPOSE_FETCH_ROUTERDESC).
5256 - Make circ->onionskin a pointer, not a static array. moria2 was using
5257 125000 circuit_t's after it had been up for a few weeks, which
5258 translates to 20+ megs of wasted space.
5259 - The private half of our EDH handshake keys are now chosen out
5260 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
5262 o Security improvements:
5263 - Start making directory caches retain old routerinfos, so soon
5264 clients can start asking by digest of descriptor rather than by
5265 fingerprint of server.
5266 - Add half our entropy from RAND_poll in OpenSSL. This knows how
5267 to use egd (if present), openbsd weirdness (if present), vms/os2
5268 weirdness (if we ever port there), and more in the future.
5270 o Bugfixes on 0.1.0.x:
5271 - Do round-robin writes of at most 16 kB per write. This might be
5272 more fair on loaded Tor servers, and it might resolve our Windows
5273 crash bug. It might also slow things down.
5274 - Our TLS handshakes were generating a single public/private
5275 keypair for the TLS context, rather than making a new one for
5276 each new connections. Oops. (But we were still rotating them
5277 periodically, so it's not so bad.)
5278 - When we were cannibalizing a circuit with a particular exit
5279 node in mind, we weren't checking to see if that exit node was
5280 already present earlier in the circuit. Oops.
5281 - When a Tor server's IP changes (e.g. from a dyndns address),
5282 upload a new descriptor so clients will learn too.
5283 - Really busy servers were keeping enough circuits open on stable
5284 connections that they were wrapping around the circuit_id
5285 space. (It's only two bytes.) This exposed a bug where we would
5286 feel free to reuse a circuit_id even if it still exists but has
5287 been marked for close. Try to fix this bug. Some bug remains.
5288 - If we would close a stream early (e.g. it asks for a .exit that
5289 we know would refuse it) but the LeaveStreamsUnattached config
5290 option is set by the controller, then don't close it.
5292 o Bugfixes on 0.1.1.8-alpha:
5293 - Fix a big pile of memory leaks, some of them serious.
5294 - Do not try to download a routerdesc if we would immediately reject
5296 - Resume inserting a newline between all router descriptors when
5297 generating (old style) signed directories, since our spec says
5299 - When providing content-type application/octet-stream for
5300 server descriptors using .z, we were leaving out the
5301 content-encoding header. Oops. (Everything tolerated this just
5302 fine, but that doesn't mean we need to be part of the problem.)
5303 - Fix a potential seg fault in getconf and getinfo using version 1
5304 of the controller protocol.
5305 - Avoid crash: do not check whether DirPort is reachable when we
5306 are suppressing it because of hibernation.
5307 - Make --hash-password not crash on exit.
5310 Changes in version 0.1.1.8-alpha - 2005-10-07
5311 o New features (major):
5312 - Clients don't download or use the directory anymore. Now they
5313 download and use network-statuses from the trusted dirservers,
5314 and fetch individual server descriptors as needed from mirrors.
5315 See dir-spec.txt for all the gory details.
5316 - Be more conservative about whether to advertise our DirPort.
5317 The main change is to not advertise if we're running at capacity
5318 and either a) we could hibernate or b) our capacity is low and
5319 we're using a default DirPort.
5320 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
5322 o New features (minor):
5323 - Try to be smart about when to retry network-status and
5324 server-descriptor fetches. Still needs some tuning.
5325 - Stop parsing, storing, or using running-routers output (but
5326 mirrors still cache and serve it).
5327 - Consider a threshold of versioning dirservers (dirservers who have
5328 an opinion about which Tor versions are still recommended) before
5329 deciding whether to warn the user that he's obsolete.
5330 - Dirservers can now reject/invalidate by key and IP, with the
5331 config options "AuthDirInvalid" and "AuthDirReject". This is
5332 useful since currently we automatically list servers as running
5333 and usable even if we know they're jerks.
5334 - Provide dire warnings to any users who set DirServer; move it out
5335 of torrc.sample and into torrc.complete.
5336 - Add MyFamily to torrc.sample in the server section.
5337 - Add nicknames to the DirServer line, so we can refer to them
5338 without requiring all our users to memorize their IP addresses.
5339 - When we get an EOF or a timeout on a directory connection, note
5340 how many bytes of serverdesc we are dropping. This will help
5341 us determine whether it is smart to parse incomplete serverdesc
5343 - Add a new function to "change pseudonyms" -- that is, to stop
5344 using any currently-dirty circuits for new streams, so we don't
5345 link new actions to old actions. Currently it's only called on
5346 HUP (or SIGNAL RELOAD).
5347 - On sighup, if UseHelperNodes changed to 1, use new circuits.
5348 - Start using RAND_bytes rather than RAND_pseudo_bytes from
5349 OpenSSL. Also, reseed our entropy every hour, not just at
5350 startup. And entropy in 512-bit chunks, not 160-bit chunks.
5352 o Fixes on 0.1.1.7-alpha:
5353 - Nobody ever implemented EVENT_ADDRMAP for control protocol
5354 version 0, so don't let version 0 controllers ask for it.
5355 - If you requested something with too many newlines via the
5356 v1 controller protocol, you could crash tor.
5357 - Fix a number of memory leaks, including some pretty serious ones.
5358 - Re-enable DirPort testing again, so Tor servers will be willing
5359 to advertise their DirPort if it's reachable.
5360 - On TLS handshake, only check the other router's nickname against
5361 its expected nickname if is_named is set.
5363 o Fixes forward-ported from 0.1.0.15:
5364 - Don't crash when we don't have any spare file descriptors and we
5365 try to spawn a dns or cpu worker.
5366 - Make the numbers in read-history and write-history into uint64s,
5367 so they don't overflow and publish negatives in the descriptor.
5370 - For the OS X package's modified privoxy config file, comment
5371 out the "logfile" line so we don't log everything passed
5373 - We were whining about using socks4 or socks5-with-local-lookup
5374 even when it's an IP in the "virtual" range we designed exactly
5376 - We were leaking some memory every time the client changes IPs.
5377 - Never call free() on tor_malloc()d memory. This will help us
5378 use dmalloc to detect memory leaks.
5379 - Check for named servers when looking them up by nickname;
5380 warn when we'recalling a non-named server by its nickname;
5381 don't warn twice about the same name.
5382 - Try to list MyFamily elements by key, not by nickname, and warn
5383 if we've not heard of the server.
5384 - Make windows platform detection (uname equivalent) smarter.
5385 - It turns out sparc64 doesn't like unaligned access either.
5388 Changes in version 0.1.0.15 - 2005-09-23
5389 o Bugfixes on 0.1.0.x:
5390 - Reject ports 465 and 587 (spam targets) in default exit policy.
5391 - Don't crash when we don't have any spare file descriptors and we
5392 try to spawn a dns or cpu worker.
5393 - Get rid of IgnoreVersion undocumented config option, and make us
5394 only warn, never exit, when we're running an obsolete version.
5395 - Don't try to print a null string when your server finds itself to
5396 be unreachable and the Address config option is empty.
5397 - Make the numbers in read-history and write-history into uint64s,
5398 so they don't overflow and publish negatives in the descriptor.
5399 - Fix a minor memory leak in smartlist_string_remove().
5400 - We were only allowing ourselves to upload a server descriptor at
5401 most every 20 minutes, even if it changed earlier than that.
5402 - Clean up log entries that pointed to old URLs.
5405 Changes in version 0.1.1.7-alpha - 2005-09-14
5406 o Fixes on 0.1.1.6-alpha:
5407 - Exit servers were crashing when people asked them to make a
5408 connection to an address not in their exit policy.
5409 - Looking up a non-existent stream for a v1 control connection would
5411 - Fix a seg fault if we ask a dirserver for a descriptor by
5412 fingerprint but he doesn't know about him.
5413 - SETCONF was appending items to linelists, not clearing them.
5414 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
5415 out and refuse the setconf if it would fail.
5416 - Downgrade the dirserver log messages when whining about
5420 - Add Peter Palfrader's check-tor script to tor/contrib/
5421 It lets you easily check whether a given server (referenced by
5422 nickname) is reachable by you.
5423 - Numerous changes to move towards client-side v2 directories. Not
5427 - If the user gave tor an odd number of command-line arguments,
5428 we were silently ignoring the last one. Now we complain and fail.
5429 [This wins the oldest-bug prize -- this bug has been present since
5430 November 2002, as released in Tor 0.0.0.]
5431 - Do not use unaligned memory access on alpha, mips, or mipsel.
5432 It *works*, but is very slow, so we treat them as if it doesn't.
5433 - Retry directory requests if we fail to get an answer we like
5434 from a given dirserver (we were retrying before, but only if
5435 we fail to connect).
5436 - When writing the RecommendedVersions line, sort them first.
5437 - When the client asked for a rendezvous port that the hidden
5438 service didn't want to provide, we were sending an IP address
5439 back along with the end cell. Fortunately, it was zero. But stop
5441 - Correct "your server is reachable" log entries to indicate that
5442 it was self-testing that told us so.
5445 Changes in version 0.1.1.6-alpha - 2005-09-09
5446 o Fixes on 0.1.1.5-alpha:
5447 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
5448 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
5449 - Fix bug with tor_memmem finding a match at the end of the string.
5450 - Make unit tests run without segfaulting.
5451 - Resolve some solaris x86 compile warnings.
5452 - Handle duplicate lines in approved-routers files without warning.
5453 - Fix bug where as soon as a server refused any requests due to his
5454 exit policy (e.g. when we ask for localhost and he tells us that's
5455 127.0.0.1 and he won't do it), we decided he wasn't obeying his
5456 exit policy using him for any exits.
5457 - Only do openssl hardware accelerator stuff if openssl version is
5460 o New controller features/fixes:
5461 - Add a "RESETCONF" command so you can set config options like
5462 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
5463 a config option in the torrc with no value, then it clears it
5464 entirely (rather than setting it to its default).
5465 - Add a "GETINFO config-file" to tell us where torrc is.
5466 - Avoid sending blank lines when GETINFO replies should be empty.
5467 - Add a QUIT command for the controller (for using it manually).
5468 - Fix a bug in SAVECONF that was adding default dirservers and
5469 other redundant entries to the torrc file.
5471 o Start on the new directory design:
5472 - Generate, publish, cache, serve new network-status format.
5473 - Publish individual descriptors (by fingerprint, by "all", and by
5475 - Publish client and server recommended versions separately.
5476 - Allow tor_gzip_uncompress() to handle multiple concatenated
5477 compressed strings. Serve compressed groups of router
5478 descriptors. The compression logic here could be more
5480 - Distinguish v1 authorities (all currently trusted directories)
5481 from v2 authorities (all trusted directories).
5482 - Change DirServers config line to note which dirs are v1 authorities.
5483 - Add configuration option "V1AuthoritativeDirectory 1" which
5484 moria1, moria2, and tor26 should set.
5485 - Remove option when getting directory cache to see whether they
5486 support running-routers; they all do now. Replace it with one
5487 to see whether caches support v2 stuff.
5490 - Dirservers now do their own external reachability testing of each
5491 Tor server, and only list them as running if they've been found to
5492 be reachable. We also send back warnings to the server's logs if
5493 it uploads a descriptor that we already believe is unreachable.
5494 - Implement exit enclaves: if we know an IP address for the
5495 destination, and there's a running Tor server at that address
5496 which allows exit to the destination, then extend the circuit to
5497 that exit first. This provides end-to-end encryption and end-to-end
5498 authentication. Also, if the user wants a .exit address or enclave,
5499 use 4 hops rather than 3, and cannibalize a general circ for it
5501 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
5502 controller. Also, rotate dns and cpu workers if the controller
5503 changes options that will affect them; and initialize the dns
5504 worker cache tree whether or not we start out as a server.
5505 - Only upload a new server descriptor when options change, 18
5506 hours have passed, uptime is reset, or bandwidth changes a lot.
5507 - Check [X-]Forwarded-For headers in HTTP requests when generating
5508 log messages. This lets people run dirservers (and caches) behind
5509 Apache but still know which IP addresses are causing warnings.
5511 o Config option changes:
5512 - Replace (Fascist)Firewall* config options with a new
5513 ReachableAddresses option that understands address policies.
5514 For example, "ReachableAddresses *:80,*:443"
5515 - Get rid of IgnoreVersion undocumented config option, and make us
5516 only warn, never exit, when we're running an obsolete version.
5517 - Make MonthlyAccountingStart config option truly obsolete now.
5520 - Reject ports 465 and 587 in the default exit policy, since
5521 people have started using them for spam too.
5522 - It turns out we couldn't bootstrap a network since we added
5523 reachability detection in 0.1.0.1-rc. Good thing the Tor network
5524 has never gone down. Add an AssumeReachable config option to let
5525 servers and dirservers bootstrap. When we're trying to build a
5526 high-uptime or high-bandwidth circuit but there aren't enough
5527 suitable servers, try being less picky rather than simply failing.
5528 - Our logic to decide if the OR we connected to was the right guy
5529 was brittle and maybe open to a mitm for unverified routers.
5530 - We weren't cannibalizing circuits correctly for
5531 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
5532 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
5533 build those from scratch. This should make hidden services faster.
5534 - Predict required circuits better, with an eye toward making hidden
5535 services faster on the service end.
5536 - Retry streams if the exit node sends back a 'misc' failure. This
5537 should result in fewer random failures. Also, after failing
5538 from resolve failed or misc, reset the num failures, so we give
5539 it a fair shake next time we try.
5540 - Clean up the rendezvous warn log msgs, and downgrade some to info.
5541 - Reduce severity on logs about dns worker spawning and culling.
5542 - When we're shutting down and we do something like try to post a
5543 server descriptor or rendezvous descriptor, don't complain that
5544 we seem to be unreachable. Of course we are, we're shutting down.
5545 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
5546 We don't use them yet, but maybe one day our DNS resolver will be
5547 able to discover them.
5548 - Make ContactInfo mandatory for authoritative directory servers.
5549 - Require server descriptors to list IPv4 addresses -- hostnames
5550 are no longer allowed. This also fixes some potential security
5551 problems with people providing hostnames as their address and then
5552 preferentially resolving them to partition users.
5553 - Change log line for unreachability to explicitly suggest /etc/hosts
5554 as the culprit. Also make it clearer what IP address and ports we're
5555 testing for reachability.
5556 - Put quotes around user-supplied strings when logging so users are
5557 more likely to realize if they add bad characters (like quotes)
5559 - Let auth dir servers start without specifying an Address config
5561 - Make unit tests (and other invocations that aren't the real Tor)
5562 run without launching listeners, creating subdirectories, and so on.
5565 Changes in version 0.1.1.5-alpha - 2005-08-08
5566 o Bugfixes included in 0.1.0.14.
5568 o Bugfixes on 0.1.0.x:
5569 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
5570 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
5571 it would silently using ignore the 6668.
5574 Changes in version 0.1.0.14 - 2005-08-08
5575 o Bugfixes on 0.1.0.x:
5576 - Fix the other half of the bug with crypto handshakes
5578 - Fix an assert trigger if you send a 'signal term' via the
5579 controller when it's listening for 'event info' messages.
5582 Changes in version 0.1.1.4-alpha - 2005-08-04
5583 o Bugfixes included in 0.1.0.13.
5586 - Improve tor_gettimeofday() granularity on windows.
5587 - Make clients regenerate their keys when their IP address changes.
5588 - Implement some more GETINFO goodness: expose helper nodes, config
5589 options, getinfo keys.
5592 Changes in version 0.1.0.13 - 2005-08-04
5593 o Bugfixes on 0.1.0.x:
5594 - Fix a critical bug in the security of our crypto handshakes.
5595 - Fix a size_t underflow in smartlist_join_strings2() that made
5596 it do bad things when you hand it an empty smartlist.
5597 - Fix Windows installer to ship Tor license (thanks to Aphex for
5598 pointing out this oversight) and put a link to the doc directory
5600 - Explicitly set no-unaligned-access for sparc: it turns out the
5601 new gcc's let you compile broken code, but that doesn't make it
5605 Changes in version 0.1.1.3-alpha - 2005-07-23
5606 o Bugfixes on 0.1.1.2-alpha:
5607 - Fix a bug in handling the controller's "post descriptor"
5609 - Fix several bugs in handling the controller's "extend circuit"
5611 - Fix a bug in handling the controller's "stream status" event.
5612 - Fix an assert failure if we have a controller listening for
5613 circuit events and we go offline.
5614 - Re-allow hidden service descriptors to publish 0 intro points.
5615 - Fix a crash when generating your hidden service descriptor if
5616 you don't have enough intro points already.
5618 o New features on 0.1.1.2-alpha:
5619 - New controller function "getinfo accounting", to ask how
5620 many bytes we've used in this time period.
5621 - Experimental support for helper nodes: a lot of the risk from
5622 a small static adversary comes because users pick new random
5623 nodes every time they rebuild a circuit. Now users will try to
5624 stick to the same small set of entry nodes if they can. Not
5625 enabled by default yet.
5627 o Bugfixes on 0.1.0.12:
5628 - If you're an auth dir server, always publish your dirport,
5629 even if you haven't yet found yourself to be reachable.
5630 - Fix a size_t underflow in smartlist_join_strings2() that made
5631 it do bad things when you hand it an empty smartlist.
5634 Changes in version 0.1.0.12 - 2005-07-18
5635 o New directory servers:
5636 - tor26 has changed IP address.
5638 o Bugfixes on 0.1.0.x:
5639 - Fix a possible double-free in tor_gzip_uncompress().
5640 - When --disable-threads is set, do not search for or link against
5642 - Don't trigger an assert if an authoritative directory server
5643 claims its dirport is 0.
5644 - Fix bug with removing Tor as an NT service: some people were
5645 getting "The service did not return an error." Thanks to Matt
5649 Changes in version 0.1.1.2-alpha - 2005-07-15
5650 o New directory servers:
5651 - tor26 has changed IP address.
5653 o Bugfixes on 0.1.0.x, crashes/leaks:
5654 - Port the servers-not-obeying-their-exit-policies fix from
5656 - Fix an fd leak in start_daemon().
5657 - On Windows, you can't always reopen a port right after you've
5658 closed it. So change retry_listeners() to only close and re-open
5659 ports that have changed.
5660 - Fix a possible double-free in tor_gzip_uncompress().
5662 o Bugfixes on 0.1.0.x, usability:
5663 - When tor_socketpair() fails in Windows, give a reasonable
5664 Windows-style errno back.
5665 - Let people type "tor --install" as well as "tor -install" when
5667 want to make it an NT service.
5668 - NT service patch from Matt Edman to improve error messages.
5669 - When the controller asks for a config option with an abbreviated
5670 name, give the full name in our response.
5671 - Correct the man page entry on TrackHostExitsExpire.
5672 - Looks like we were never delivering deflated (i.e. compressed)
5673 running-routers lists, even when asked. Oops.
5674 - When --disable-threads is set, do not search for or link against
5677 o Bugfixes on 0.1.1.x:
5678 - Fix a seg fault with autodetecting which controller version is
5682 - New hidden service descriptor format: put a version in it, and
5683 let people specify introduction/rendezvous points that aren't
5684 in "the directory" (which is subjective anyway).
5685 - Allow the DEBUG controller event to work again. Mark certain log
5686 entries as "don't tell this to controllers", so we avoid cycles.
5689 Changes in version 0.1.0.11 - 2005-06-30
5690 o Bugfixes on 0.1.0.x:
5691 - Fix major security bug: servers were disregarding their
5692 exit policies if clients behaved unexpectedly.
5693 - Make OS X init script check for missing argument, so we don't
5694 confuse users who invoke it incorrectly.
5695 - Fix a seg fault in "tor --hash-password foo".
5696 - The MAPADDRESS control command was broken.
5699 Changes in version 0.1.1.1-alpha - 2005-06-29
5701 - Make OS X init script check for missing argument, so we don't
5702 confuse users who invoke it incorrectly.
5703 - Fix a seg fault in "tor --hash-password foo".
5704 - Fix a possible way to DoS dirservers.
5705 - When we complain that your exit policy implicitly allows local or
5706 private address spaces, name them explicitly so operators can
5708 - Make the log message less scary when all the dirservers are
5709 temporarily unreachable.
5710 - We were printing the number of idle dns workers incorrectly when
5714 - Revised controller protocol (version 1) that uses ascii rather
5715 than binary. Add supporting libraries in python and java so you
5716 can use the controller from your applications without caring how
5718 - Spiffy new support for crypto hardware accelerators. Can somebody
5722 Changes in version 0.0.9.10 - 2005-06-16
5723 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
5724 - Refuse relay cells that claim to have a length larger than the
5725 maximum allowed. This prevents a potential attack that could read
5726 arbitrary memory (e.g. keys) from an exit server's process
5730 Changes in version 0.1.0.10 - 2005-06-14
5731 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
5732 libevent before 1.1a.
5735 Changes in version 0.1.0.9-rc - 2005-06-09
5737 - Reset buf->highwater every time buf_shrink() is called, not just on
5738 a successful shrink. This was causing significant memory bloat.
5739 - Fix buffer overflow when checking hashed passwords.
5740 - Security fix: if seeding the RNG on Win32 fails, quit.
5741 - Allow seeding the RNG on Win32 even when you're not running as
5743 - Disable threading on Solaris too. Something is wonky with it,
5744 cpuworkers, and reentrant libs.
5745 - Reenable the part of the code that tries to flush as soon as an
5746 OR outbuf has a full TLS record available. Perhaps this will make
5747 OR outbufs not grow as huge except in rare cases, thus saving lots
5748 of CPU time plus memory.
5749 - Reject malformed .onion addresses rather then passing them on as
5750 normal web requests.
5751 - Adapt patch from Adam Langley: fix possible memory leak in
5752 tor_lookup_hostname().
5753 - Initialize libevent later in the startup process, so the logs are
5754 already established by the time we start logging libevent warns.
5755 - Use correct errno on win32 if libevent fails.
5756 - Check and warn about known-bad/slow libevent versions.
5757 - Pay more attention to the ClientOnly config option.
5758 - Have torctl.in/tor.sh.in check for location of su binary (needed
5760 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
5761 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
5762 HttpProxyAuthenticator
5763 - Stop warning about sigpipes in the logs. We're going to
5764 pretend that getting these occassionally is normal and fine.
5765 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
5767 installer screens; and don't put stuff into StartupItems unless
5768 the user asks you to.
5769 - Require servers that use the default dirservers to have public IP
5770 addresses. We have too many servers that are configured with private
5771 IPs and their admins never notice the log entries complaining that
5772 their descriptors are being rejected.
5773 - Add OSX uninstall instructions. An actual uninstall script will
5777 Changes in version 0.1.0.8-rc - 2005-05-23
5779 - It turns out that kqueue on OS X 10.3.9 was causing kernel
5780 panics. Disable kqueue on all OS X Tors.
5781 - Fix RPM: remove duplicate line accidentally added to the rpm
5783 - Disable threads on openbsd too, since its gethostaddr is not
5785 - Tolerate libevent 0.8 since it still works, even though it's
5787 - Enable building on Red Hat 9.0 again.
5788 - Allow the middle hop of the testing circuit to be running any
5789 version, now that most of them have the bugfix to let them connect
5790 to unknown servers. This will allow reachability testing to work
5791 even when 0.0.9.7-0.0.9.9 become obsolete.
5792 - Handle relay cells with rh.length too large. This prevents
5793 a potential attack that could read arbitrary memory (maybe even
5794 keys) from the exit server's process.
5795 - We screwed up the dirport reachability testing when we don't yet
5796 have a cached version of the directory. Hopefully now fixed.
5797 - Clean up router_load_single_router() (used by the controller),
5798 so it doesn't seg fault on error.
5799 - Fix a minor memory leak when somebody establishes an introduction
5800 point at your Tor server.
5801 - If a socks connection ends because read fails, don't warn that
5802 you're not sending a socks reply back.
5805 - Add HttpProxyAuthenticator config option too, that works like
5806 the HttpsProxyAuthenticator config option.
5807 - Encode hashed controller passwords in hex instead of base64,
5808 to make it easier to write controllers.
5811 Changes in version 0.1.0.7-rc - 2005-05-17
5813 - Fix a bug in the OS X package installer that prevented it from
5814 installing on Tiger.
5815 - Fix a script bug in the OS X package installer that made it
5816 complain during installation.
5817 - Find libevent even if it's hiding in /usr/local/ and your
5818 CFLAGS and LDFLAGS don't tell you to look there.
5819 - Be able to link with libevent as a shared library (the default
5820 after 1.0d), even if it's hiding in /usr/local/lib and even
5821 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
5822 assuming you're running gcc. Otherwise fail and give a useful
5824 - Fix a bug in the RPM packager: set home directory for _tor to
5825 something more reasonable when first installing.
5826 - Free a minor amount of memory that is still reachable on exit.
5829 Changes in version 0.1.0.6-rc - 2005-05-14
5831 - Implement --disable-threads configure option. Disable threads on
5832 netbsd by default, because it appears to have no reentrant resolver
5834 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
5835 release (1.1) detects and disables kqueue if it's broken.
5836 - Append default exit policy before checking for implicit internal
5837 addresses. Now we don't log a bunch of complaints on startup
5838 when using the default exit policy.
5839 - Some people were putting "Address " in their torrc, and they had
5840 a buggy resolver that resolved " " to 0.0.0.0. Oops.
5841 - If DataDir is ~/.tor, and that expands to /.tor, then default to
5842 LOCALSTATEDIR/tor instead.
5843 - Fix fragmented-message bug in TorControl.py.
5844 - Resolve a minor bug which would prevent unreachable dirports
5845 from getting suppressed in the published descriptor.
5846 - When the controller gave us a new descriptor, we weren't resolving
5847 it immediately, so Tor would think its address was 0.0.0.0 until
5848 we fetched a new directory.
5849 - Fix an uppercase/lowercase case error in suppressing a bogus
5850 libevent warning on some Linuxes.
5853 - Begin scrubbing sensitive strings from logs by default. Turn off
5854 the config option SafeLogging if you need to do debugging.
5855 - Switch to a new buffer management algorithm, which tries to avoid
5856 reallocing and copying quite as much. In first tests it looks like
5857 it uses *more* memory on average, but less cpu.
5858 - First cut at support for "create-fast" cells. Clients can use
5859 these when extending to their first hop, since the TLS already
5860 provides forward secrecy and authentication. Not enabled on
5862 - When dirservers refuse a router descriptor, we now log its
5863 contactinfo, platform, and the poster's IP address.
5864 - Call tor_free_all instead of connections_free_all after forking, to
5865 save memory on systems that need to fork.
5866 - Whine at you if you're a server and you don't set your contactinfo.
5867 - Implement --verify-config command-line option to check if your torrc
5868 is valid without actually launching Tor.
5869 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
5870 rather than just rejecting it.
5873 Changes in version 0.1.0.5-rc - 2005-04-27
5875 - Stop trying to print a null pointer if an OR conn fails because
5876 we didn't like its cert.
5878 - Switch our internal buffers implementation to use a ring buffer,
5879 to hopefully improve performance for fast servers a lot.
5880 - Add HttpsProxyAuthenticator support (basic auth only), based
5881 on patch from Adam Langley.
5882 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
5883 the fast servers that have been joining lately.
5884 - Give hidden service accesses extra time on the first attempt,
5885 since 60 seconds is often only barely enough. This might improve
5887 - Improve performance for dirservers: stop re-parsing the whole
5888 directory every time you regenerate it.
5889 - Add more debugging info to help us find the weird dns freebsd
5890 pthreads bug; cleaner debug messages to help track future issues.
5893 Changes in version 0.0.9.9 - 2005-04-23
5894 o Bugfixes on 0.0.9.x:
5895 - If unofficial Tor clients connect and send weird TLS certs, our
5896 Tor server triggers an assert. This release contains a minimal
5897 backport from the broader fix that we put into 0.1.0.4-rc.
5900 Changes in version 0.1.0.4-rc - 2005-04-23
5902 - If unofficial Tor clients connect and send weird TLS certs, our
5903 Tor server triggers an assert. Stop asserting, and start handling
5904 TLS errors better in other situations too.
5905 - When the controller asks us to tell it about all the debug-level
5906 logs, it turns out we were generating debug-level logs while
5907 telling it about them, which turns into a bad loop. Now keep
5908 track of whether you're sending a debug log to the controller,
5909 and don't log when you are.
5910 - Fix the "postdescriptor" feature of the controller interface: on
5911 non-complete success, only say "done" once.
5913 - Clients are now willing to load balance over up to 2mB, not 1mB,
5914 of advertised bandwidth capacity.
5915 - Add a NoPublish config option, so you can be a server (e.g. for
5916 testing running Tor servers in other Tor networks) without
5917 publishing your descriptor to the primary dirservers.
5920 Changes in version 0.1.0.3-rc - 2005-04-08
5921 o Improvements on 0.1.0.2-rc:
5922 - Client now retries when streams end early for 'hibernating' or
5923 'resource limit' reasons, rather than failing them.
5924 - More automated handling for dirserver operators:
5925 - Automatically approve nodes running 0.1.0.2-rc or later,
5926 now that the the reachability detection stuff is working.
5927 - Now we allow two unverified servers with the same nickname
5928 but different keys. But if a nickname is verified, only that
5929 nickname+key are allowed.
5930 - If you're an authdirserver connecting to an address:port,
5931 and it's not the OR you were expecting, forget about that
5932 descriptor. If he *was* the one you were expecting, then forget
5933 about all other descriptors for that address:port.
5934 - Allow servers to publish descriptors from 12 hours in the future.
5935 Corollary: only whine about clock skew from the dirserver if
5936 he's a trusted dirserver (since now even verified servers could
5937 have quite wrong clocks).
5938 - Adjust maximum skew and age for rendezvous descriptors: let skew
5939 be 48 hours rather than 90 minutes.
5940 - Efficiency improvements:
5941 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
5942 it much faster to look up a circuit for each relay cell.
5943 - Remove most calls to assert_all_pending_dns_resolves_ok(),
5944 since they're eating our cpu on exit nodes.
5945 - Stop wasting time doing a case insensitive comparison for every
5946 dns name every time we do any lookup. Canonicalize the names to
5947 lowercase and be done with it.
5948 - Start sending 'truncated' cells back rather than destroy cells,
5949 if the circuit closes in front of you. This means we won't have
5950 to abandon partially built circuits.
5951 - Only warn once per nickname from add_nickname_list_to_smartlist
5952 per failure, so an entrynode or exitnode choice that's down won't
5954 - Put a note in the torrc about abuse potential with the default
5956 - Revise control spec and implementation to allow all log messages to
5957 be sent to controller with their severities intact (suggested by
5958 Matt Edman). Update TorControl to handle new log event types.
5959 - Provide better explanation messages when controller's POSTDESCRIPTOR
5961 - Stop putting nodename in the Platform string in server descriptors.
5962 It doesn't actually help, and it is confusing/upsetting some people.
5964 o Bugfixes on 0.1.0.2-rc:
5965 - We were printing the host mask wrong in exit policies in server
5966 descriptors. This isn't a critical bug though, since we were still
5967 obeying the exit policy internally.
5968 - Fix Tor when compiled with libevent but without pthreads: move
5969 connection_unregister() from _connection_free() to
5971 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
5972 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
5973 when we look through the connection array, we'll find any of the
5974 cpu/dnsworkers. This is no good.
5976 o Bugfixes on 0.0.9.8:
5977 - Fix possible bug on threading platforms (e.g. win32) which was
5978 leaking a file descriptor whenever a cpuworker or dnsworker died.
5979 - When using preferred entry or exit nodes, ignore whether the
5980 circuit wants uptime or capacity. They asked for the nodes, they
5982 - chdir() to your datadirectory at the *end* of the daemonize process,
5983 not the beginning. This was a problem because the first time you
5984 run tor, if your datadir isn't there, and you have runasdaemon set
5985 to 1, it will try to chdir to it before it tries to create it. Oops.
5986 - Handle changed router status correctly when dirserver reloads
5987 fingerprint file. We used to be dropping all unverified descriptors
5988 right then. The bug was hidden because we would immediately
5989 fetch a directory from another dirserver, which would include the
5990 descriptors we just dropped.
5991 - When we're connecting to an OR and he's got a different nickname/key
5992 than we were expecting, only complain loudly if we're an OP or a
5993 dirserver. Complaining loudly to the OR admins just confuses them.
5994 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
5995 artificially capped at 500kB.
5998 Changes in version 0.0.9.8 - 2005-04-07
5999 o Bugfixes on 0.0.9.x:
6000 - We have a bug that I haven't found yet. Sometimes, very rarely,
6001 cpuworkers get stuck in the 'busy' state, even though the cpuworker
6002 thinks of itself as idle. This meant that no new circuits ever got
6003 established. Here's a workaround to kill any cpuworker that's been
6004 busy for more than 100 seconds.
6007 Changes in version 0.1.0.2-rc - 2005-04-01
6008 o Bugfixes on 0.1.0.1-rc:
6009 - Fixes on reachability detection:
6010 - Don't check for reachability while hibernating.
6011 - If ORPort is reachable but DirPort isn't, still publish the
6012 descriptor, but zero out DirPort until it's found reachable.
6013 - When building testing circs for ORPort testing, use only
6014 high-bandwidth nodes, so fewer circuits fail.
6015 - Complain about unreachable ORPort separately from unreachable
6016 DirPort, so the user knows what's going on.
6017 - Make sure we only conclude ORPort reachability if we didn't
6018 initiate the conn. Otherwise we could falsely conclude that
6019 we're reachable just because we connected to the guy earlier
6020 and he used that same pipe to extend to us.
6021 - Authdirservers shouldn't do ORPort reachability detection,
6022 since they're in clique mode, so it will be rare to find a
6023 server not already connected to them.
6024 - When building testing circuits, always pick middle hops running
6025 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
6026 bug. (This is a kludge; it will go away when 0.0.9.x becomes
6028 - When we decide we're reachable, actually publish our descriptor
6030 - Fix bug in redirectstream in the controller.
6031 - Fix the state descriptor strings so logs don't claim edge streams
6032 are in a different state than they actually are.
6033 - Use recent libevent features when possible (this only really affects
6034 win32 and osx right now, because the new libevent with these
6035 features hasn't been released yet). Add code to suppress spurious
6037 - Prevent possible segfault in connection_close_unattached_ap().
6038 - Fix newlines on torrc in win32.
6039 - Improve error msgs when tor-resolve fails.
6041 o Improvements on 0.0.9.x:
6042 - New experimental script tor/contrib/ExerciseServer.py (needs more
6043 work) that uses the controller interface to build circuits and
6044 fetch pages over them. This will help us bootstrap servers that
6045 have lots of capacity but haven't noticed it yet.
6046 - New experimental script tor/contrib/PathDemo.py (needs more work)
6047 that uses the controller interface to let you choose whole paths
6049 "<hostname>.<path,separated by dots>.<length of path>.path"
6050 - When we've connected to an OR and handshaked but didn't like
6051 the result, we were closing the conn without sending destroy
6052 cells back for pending circuits. Now send those destroys.
6055 Changes in version 0.0.9.7 - 2005-04-01
6056 o Bugfixes on 0.0.9.x:
6057 - Fix another race crash bug (thanks to Glenn Fink for reporting).
6058 - Compare identity to identity, not to nickname, when extending to
6059 a router not already in the directory. This was preventing us from
6060 extending to unknown routers. Oops.
6061 - Make sure to create OS X Tor user in <500 range, so we aren't
6062 creating actual system users.
6063 - Note where connection-that-hasn't-sent-end was marked, and fix
6064 a few really loud instances of this harmless bug (it's fixed more
6068 Changes in version 0.1.0.1-rc - 2005-03-28
6070 - Add reachability testing. Your Tor server will automatically try
6071 to see if its ORPort and DirPort are reachable from the outside,
6072 and it won't upload its descriptor until it decides they are.
6073 - Handle unavailable hidden services better. Handle slow or busy
6074 hidden services better.
6075 - Add support for CONNECTing through https proxies, with "HttpsProxy"
6077 - New exit policy: accept most low-numbered ports, rather than
6078 rejecting most low-numbered ports.
6079 - More Tor controller support (still experimental). See
6080 http://tor.eff.org/doc/control-spec.txt for all the new features,
6081 including signals to emulate unix signals from any platform;
6082 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
6083 closestream; closecircuit; etc.
6084 - Make nt services work and start on startup on win32 (based on
6085 patch by Matt Edman).
6086 - Add a new AddressMap config directive to rewrite incoming socks
6087 addresses. This lets you, for example, declare an implicit
6088 required exit node for certain sites.
6089 - Add a new TrackHostExits config directive to trigger addressmaps
6090 for certain incoming socks addresses -- for sites that break when
6091 your exit keeps changing (based on patch by Mike Perry).
6092 - Redo the client-side dns cache so it's just an addressmap too.
6093 - Notice when our IP changes, and reset stats/uptime/reachability.
6094 - When an application is using socks5, give him the whole variety of
6095 potential socks5 responses (connect refused, host unreachable, etc),
6096 rather than just "success" or "failure".
6097 - A more sane version numbering system. See
6098 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
6099 - New contributed script "exitlist": a simple python script to
6100 parse directories and find Tor nodes that exit to listed
6102 - New contributed script "privoxy-tor-toggle" to toggle whether
6103 Privoxy uses Tor. Seems to be configured for Debian by default.
6104 - Report HTTP reasons to client when getting a response from directory
6105 servers -- so you can actually know what went wrong.
6106 - New config option MaxAdvertisedBandwidth which lets you advertise
6107 a low bandwidthrate (to not attract as many circuits) while still
6108 allowing a higher bandwidthrate in reality.
6110 o Robustness/stability fixes:
6111 - Make Tor use Niels Provos's libevent instead of its current
6112 poll-but-sometimes-select mess. This will let us use faster async
6113 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
6115 - pthread support now too. This was forced because when we forked,
6116 we ended up wasting a lot of duplicate ram over time. Also switch
6117 to foo_r versions of some library calls to allow reentry and
6119 - Better handling for heterogeneous / unreliable nodes:
6120 - Annotate circuits w/ whether they aim to contain high uptime nodes
6121 and/or high capacity nodes. When building circuits, choose
6123 - This means that every single node in an intro rend circuit,
6124 not just the last one, will have a minimum uptime.
6125 - New config option LongLivedPorts to indicate application streams
6126 that will want high uptime circuits.
6127 - Servers reset uptime when a dir fetch entirely fails. This
6128 hopefully reflects stability of the server's network connectivity.
6129 - If somebody starts his tor server in Jan 2004 and then fixes his
6130 clock, don't make his published uptime be a year.
6131 - Reset published uptime when you wake up from hibernation.
6132 - Introduce a notion of 'internal' circs, which are chosen without
6133 regard to the exit policy of the last hop. Intro and rendezvous
6134 circs must be internal circs, to avoid leaking information. Resolve
6135 and connect streams can use internal circs if they want.
6136 - New circuit pooling algorithm: make sure to have enough circs around
6137 to satisfy any predicted ports, and also make sure to have 2 internal
6138 circs around if we've required internal circs lately (and with high
6139 uptime if we've seen that lately too).
6140 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
6141 which describes how often we retry making new circuits if current
6142 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
6143 how long we're willing to make use of an already-dirty circuit.
6144 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
6145 circ as necessary, if there are any completed ones lying around
6146 when we try to launch one.
6147 - Make hidden services try to establish a rendezvous for 30 seconds,
6148 rather than for n (where n=3) attempts to build a circuit.
6149 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
6150 "ShutdownWaitLength".
6151 - Try to be more zealous about calling connection_edge_end when
6152 things go bad with edge conns in connection.c.
6153 - Revise tor-spec to add more/better stream end reasons.
6154 - Revise all calls to connection_edge_end to avoid sending "misc",
6155 and to take errno into account where possible.
6158 - Fix a race condition that can trigger an assert, when we have a
6159 pending create cell and an OR connection fails right then.
6160 - Fix several double-mark-for-close bugs, e.g. where we were finding
6161 a conn for a cell even if that conn is already marked for close.
6162 - Make sequence of log messages when starting on win32 with no config
6163 file more reasonable.
6164 - When choosing an exit node for a new non-internal circ, don't take
6165 into account whether it'll be useful for any pending x.onion
6166 addresses -- it won't.
6167 - Turn addr_policy_compare from a tristate to a quadstate; this should
6168 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
6169 for google.com" problem.
6170 - Make "platform" string in descriptor more accurate for Win32 servers,
6171 so it's not just "unknown platform".
6172 - Fix an edge case in parsing config options (thanks weasel).
6173 If they say "--" on the commandline, it's not an option.
6174 - Reject odd-looking addresses at the client (e.g. addresses that
6175 contain a colon), rather than having the server drop them because
6177 - tor-resolve requests were ignoring .exit if there was a working circuit
6178 they could use instead.
6179 - REUSEADDR on normal platforms means you can rebind to the port
6180 right after somebody else has let it go. But REUSEADDR on win32
6181 means to let you bind to the port _even when somebody else
6182 already has it bound_! So, don't do that on Win32.
6183 - Change version parsing logic: a version is "obsolete" if it is not
6184 recommended and (1) there is a newer recommended version in the
6185 same series, or (2) there are no recommended versions in the same
6186 series, but there are some recommended versions in a newer series.
6187 A version is "new" if it is newer than any recommended version in
6189 - Stop most cases of hanging up on a socks connection without sending
6193 - Require BandwidthRate to be at least 20kB/s for servers.
6194 - When a dirserver causes you to give a warn, mention which dirserver
6196 - New config option DirAllowPrivateAddresses for authdirservers.
6197 Now by default they refuse router descriptors that have non-IP or
6198 private-IP addresses.
6199 - Stop publishing socksport in the directory, since it's not
6200 actually meant to be public. For compatibility, publish a 0 there
6202 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
6203 smart" value, that is low for servers and high for clients.
6204 - If our clock jumps forward by 100 seconds or more, assume something
6205 has gone wrong with our network and abandon all not-yet-used circs.
6206 - Warn when exit policy implicitly allows local addresses.
6207 - If we get an incredibly skewed timestamp from a dirserver mirror
6208 that isn't a verified OR, don't warn -- it's probably him that's
6210 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
6211 cookies to disk and doesn't log each web request to disk. (Thanks
6212 to Brett Carrington for pointing this out.)
6213 - When a client asks us for a dir mirror and we don't have one,
6214 launch an attempt to get a fresh one.
6215 - If we're hibernating and we get a SIGINT, exit immediately.
6216 - Add --with-dmalloc ./configure option, to track memory leaks.
6217 - And try to free all memory on closing, so we can detect what
6219 - Cache local dns resolves correctly even when they're .exit
6221 - Give a better warning when some other server advertises an
6222 ORPort that is actually an apache running ssl.
6223 - Add "opt hibernating 1" to server descriptor to make it clearer
6224 whether the server is hibernating.
6227 Changes in version 0.0.9.6 - 2005-03-24
6228 o Bugfixes on 0.0.9.x (crashes and asserts):
6229 - Add new end stream reasons to maintainance branch. Fix bug where
6230 reason (8) could trigger an assert. Prevent bug from recurring.
6231 - Apparently win32 stat wants paths to not end with a slash.
6232 - Fix assert triggers in assert_cpath_layer_ok(), where we were
6233 blowing away the circuit that conn->cpath_layer points to, then
6234 checking to see if the circ is well-formed. Backport check to make
6235 sure we dont use the cpath on a closed connection.
6236 - Prevent circuit_resume_edge_reading_helper() from trying to package
6237 inbufs for marked-for-close streams.
6238 - Don't crash on hup if your options->address has become unresolvable.
6239 - Some systems (like OS X) sometimes accept() a connection and tell
6240 you the remote host is 0.0.0.0:0. If this happens, due to some
6241 other mis-features, we get confused; so refuse the conn for now.
6243 o Bugfixes on 0.0.9.x (other):
6244 - Fix harmless but scary "Unrecognized content encoding" warn message.
6245 - Add new stream error reason: TORPROTOCOL reason means "you are not
6246 speaking a version of Tor I understand; say bye-bye to your stream."
6247 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
6248 into the future, now that we are more tolerant of skew. This
6249 resolves a bug where a Tor server would refuse to cache a directory
6250 because all the directories it gets are too far in the future;
6251 yet the Tor server never logs any complaints about clock skew.
6252 - Mac packaging magic: make man pages useable, and do not overwrite
6253 existing torrc files.
6254 - Make OS X log happily to /var/log/tor/tor.log
6257 Changes in version 0.0.9.5 - 2005-02-22
6258 o Bugfixes on 0.0.9.x:
6259 - Fix an assert race at exit nodes when resolve requests fail.
6260 - Stop picking unverified dir mirrors--it only leads to misery.
6261 - Patch from Matt Edman to make NT services work better. Service
6262 support is still not compiled into the executable by default.
6263 - Patch from Dmitri Bely so the Tor service runs better under
6264 the win32 SYSTEM account.
6265 - Make tor-resolve actually work (?) on Win32.
6266 - Fix a sign bug when getrlimit claims to have 4+ billion
6267 file descriptors available.
6268 - Stop refusing to start when bandwidthburst == bandwidthrate.
6269 - When create cells have been on the onion queue more than five
6270 seconds, just send back a destroy and take them off the list.
6273 Changes in version 0.0.9.4 - 2005-02-03
6274 o Bugfixes on 0.0.9:
6275 - Fix an assert bug that took down most of our servers: when
6276 a server claims to have 1 GB of bandwidthburst, don't
6278 - Don't crash as badly if we have spawned the max allowed number
6279 of dnsworkers, or we're out of file descriptors.
6280 - Block more file-sharing ports in the default exit policy.
6281 - MaxConn is now automatically set to the hard limit of max
6282 file descriptors we're allowed (ulimit -n), minus a few for
6284 - Give a clearer message when servers need to raise their
6285 ulimit -n when they start running out of file descriptors.
6286 - SGI Compatibility patches from Jan Schaumann.
6287 - Tolerate a corrupt cached directory better.
6288 - When a dirserver hasn't approved your server, list which one.
6289 - Go into soft hibernation after 95% of the bandwidth is used,
6290 not 99%. This is especially important for daily hibernators who
6291 have a small accounting max. Hopefully it will result in fewer
6292 cut connections when the hard hibernation starts.
6293 - Load-balance better when using servers that claim more than
6294 800kB/s of capacity.
6295 - Make NT services work (experimental, only used if compiled in).
6298 Changes in version 0.0.9.3 - 2005-01-21
6299 o Bugfixes on 0.0.9:
6300 - Backport the cpu use fixes from main branch, so busy servers won't
6301 need as much processor time.
6302 - Work better when we go offline and then come back, or when we
6303 run Tor at boot before the network is up. We do this by
6304 optimistically trying to fetch a new directory whenever an
6305 application request comes in and we think we're offline -- the
6306 human is hopefully a good measure of when the network is back.
6307 - Backport some minimal hidserv bugfixes: keep rend circuits open as
6308 long as you keep using them; actually publish hidserv descriptors
6309 shortly after they change, rather than waiting 20-40 minutes.
6310 - Enable Mac startup script by default.
6311 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
6312 - When you update AllowUnverifiedNodes or FirewallPorts via the
6313 controller's setconf feature, we were always appending, never
6315 - When you update HiddenServiceDir via setconf, it was screwing up
6316 the order of reading the lines, making it fail.
6317 - Do not rewrite a cached directory back to the cache; otherwise we
6318 will think it is recent and not fetch a newer one on startup.
6319 - Workaround for webservers that lie about Content-Encoding: Tor
6320 now tries to autodetect compressed directories and compression
6321 itself. This lets us Proxypass dir fetches through apache.
6324 Changes in version 0.0.9.2 - 2005-01-04
6325 o Bugfixes on 0.0.9 (crashes and asserts):
6326 - Fix an assert on startup when the disk is full and you're logging
6328 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
6329 style address, then we'd crash.
6330 - Fix an assert trigger when the running-routers string we get from
6331 a dirserver is broken.
6332 - Make worker threads start and run on win32. Now win32 servers
6334 - Bandaid (not actually fix, but now it doesn't crash) an assert
6335 where the dns worker dies mysteriously and the main Tor process
6336 doesn't remember anything about the address it was resolving.
6338 o Bugfixes on 0.0.9 (Win32):
6339 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
6340 name out of the warning/assert messages.
6341 - Fix a superficial "unhandled error on read" bug on win32.
6342 - The win32 installer no longer requires a click-through for our
6343 license, since our Free Software license grants rights but does not
6345 - Win32: When connecting to a dirserver fails, try another one
6346 immediately. (This was already working for non-win32 Tors.)
6347 - Stop trying to parse $HOME on win32 when hunting for default
6349 - Make tor-resolve.c work on win32 by calling network_init().
6351 o Bugfixes on 0.0.9 (other):
6352 - Make 0.0.9.x build on Solaris again.
6353 - Due to a fencepost error, we were blowing away the \n when reporting
6354 confvalue items in the controller. So asking for multiple config
6355 values at once couldn't work.
6356 - When listing circuits that are pending on an opening OR connection,
6357 if we're an OR we were listing circuits that *end* at us as
6358 being pending on every listener, dns/cpu worker, etc. Stop that.
6359 - Dirservers were failing to create 'running-routers' or 'directory'
6360 strings if we had more than some threshold of routers. Fix them so
6361 they can handle any number of routers.
6362 - Fix a superficial "Duplicate mark for close" bug.
6363 - Stop checking for clock skew for OR connections, even for servers.
6364 - Fix a fencepost error that was chopping off the last letter of any
6365 nickname that is the maximum allowed nickname length.
6366 - Update URLs in log messages so they point to the new website.
6367 - Fix a potential problem in mangling server private keys while
6368 writing to disk (not triggered yet, as far as we know).
6369 - Include the licenses for other free software we include in Tor,
6370 now that we're shipping binary distributions more regularly.
6373 Changes in version 0.0.9.1 - 2004-12-15
6374 o Bugfixes on 0.0.9:
6375 - Make hibernation actually work.
6376 - Make HashedControlPassword config option work.
6377 - When we're reporting event circuit status to a controller,
6378 don't use the stream status code.
6381 Changes in version 0.0.9 - 2004-12-12
6383 - Clean up manpage and torrc.sample file.
6384 - Clean up severities and text of log warnings.
6386 - Make servers trigger an assert when they enter hibernation.
6389 Changes in version 0.0.9rc7 - 2004-12-08
6390 o Bugfixes on 0.0.9rc:
6391 - Fix a stack-trashing crash when an exit node begins hibernating.
6392 - Avoid looking at unallocated memory while considering which
6393 ports we need to build circuits to cover.
6394 - Stop a sigpipe: when an 'end' cell races with eof from the app,
6395 we shouldn't hold-open-until-flush if the eof arrived first.
6396 - Fix a bug with init_cookie_authentication() in the controller.
6397 - When recommending new-format log lines, if the upper bound is
6398 LOG_ERR, leave it implicit.
6400 o Bugfixes on 0.0.8.1:
6401 - Fix a whole slew of memory leaks.
6402 - Fix isspace() and friends so they still make Solaris happy
6403 but also so they don't trigger asserts on win32.
6404 - Fix parse_iso_time on platforms without strptime (eg win32).
6405 - win32: tolerate extra "readable" events better.
6406 - win32: when being multithreaded, leave parent fdarray open.
6407 - Make unit tests work on win32.
6410 Changes in version 0.0.9rc6 - 2004-12-06
6411 o Bugfixes on 0.0.9pre:
6412 - Clean up some more integer underflow opportunities (not exploitable
6414 - While hibernating, hup should not regrow our listeners.
6415 - Send an end to the streams we close when we hibernate, rather
6416 than just chopping them off.
6417 - React to eof immediately on non-open edge connections.
6419 o Bugfixes on 0.0.8.1:
6420 - Calculate timeout for waiting for a connected cell from the time
6421 we sent the begin cell, not from the time the stream started. If
6422 it took a long time to establish the circuit, we would time out
6423 right after sending the begin cell.
6424 - Fix router_compare_addr_to_addr_policy: it was not treating a port
6425 of * as always matching, so we were picking reject *:* nodes as
6426 exit nodes too. Oops.
6429 - New circuit building strategy: keep a list of ports that we've
6430 used in the past 6 hours, and always try to have 2 circuits open
6431 or on the way that will handle each such port. Seed us with port
6432 80 so web users won't complain that Tor is "slow to start up".
6433 - Make kill -USR1 dump more useful stats about circuits.
6434 - When warning about retrying or giving up, print the address, so
6435 the user knows which one it's talking about.
6436 - If you haven't used a clean circuit in an hour, throw it away,
6437 just to be on the safe side. (This means after 6 hours a totally
6438 unused Tor client will have no circuits open.)
6441 Changes in version 0.0.9rc5 - 2004-12-01
6442 o Bugfixes on 0.0.8.1:
6443 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
6444 - Let resolve conns retry/expire also, rather than sticking around
6446 - If we are using select, make sure we stay within FD_SETSIZE.
6448 o Bugfixes on 0.0.9pre:
6449 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
6450 but doesn't seem to be currently; thanks to Ilja van Sprundel for
6452 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
6453 instead. Impose minima and maxima for all *Period options; impose
6454 even tighter maxima for fetching if we are a caching dirserver.
6455 Clip rather than rejecting.
6456 - Fetch cached running-routers from servers that serve it (that is,
6457 authdirservers and servers running 0.0.9rc5-cvs or later.)
6460 - Accept *:706 (silc) in default exit policy.
6461 - Implement new versioning format for post 0.1.
6462 - Support "foo.nickname.exit" addresses, to let Alice request the
6463 address "foo" as viewed by exit node "nickname". Based on a patch
6465 - Make tor --version --version dump the cvs Id of every file.
6468 Changes in version 0.0.9rc4 - 2004-11-28
6469 o Bugfixes on 0.0.8.1:
6470 - Make windows sockets actually non-blocking (oops), and handle
6471 win32 socket errors better.
6473 o Bugfixes on 0.0.9rc1:
6474 - Actually catch the -USR2 signal.
6477 Changes in version 0.0.9rc3 - 2004-11-25
6478 o Bugfixes on 0.0.8.1:
6479 - Flush the log file descriptor after we print "Tor opening log file",
6480 so we don't see those messages days later.
6482 o Bugfixes on 0.0.9rc1:
6483 - Make tor-resolve work again.
6484 - Avoid infinite loop in tor-resolve if tor hangs up on it.
6485 - Fix an assert trigger for clients/servers handling resolves.
6488 Changes in version 0.0.9rc2 - 2004-11-24
6489 o Bugfixes on 0.0.9rc1:
6490 - I broke socks5 support while fixing the eof bug.
6491 - Allow unitless bandwidths and intervals; they default to bytes
6493 - New servers don't start out hibernating; they are active until
6494 they run out of bytes, so they have a better estimate of how
6495 long it takes, and so their operators can know they're working.
6498 Changes in version 0.0.9rc1 - 2004-11-23
6499 o Bugfixes on 0.0.8.1:
6500 - Finally fix a bug that's been plaguing us for a year:
6501 With high load, circuit package window was reaching 0. Whenever
6502 we got a circuit-level sendme, we were reading a lot on each
6503 socket, but only writing out a bit. So we would eventually reach
6504 eof. This would be noticed and acted on even when there were still
6505 bytes sitting in the inbuf.
6506 - When poll() is interrupted, we shouldn't believe the revents values.
6508 o Bugfixes on 0.0.9pre6:
6509 - Fix hibernate bug that caused pre6 to be broken.
6510 - Don't keep rephist info for routers that haven't had activity for
6511 24 hours. (This matters now that clients have keys, since we track
6513 - Never call close_temp_logs while validating log options.
6514 - Fix backslash-escaping on tor.sh.in and torctl.in.
6517 - Implement weekly/monthly/daily accounting: now you specify your
6518 hibernation properties by
6519 AccountingMax N bytes|KB|MB|GB|TB
6520 AccountingStart day|week|month [day] HH:MM
6521 Defaults to "month 1 0:00".
6522 - Let bandwidth and interval config options be specified as 5 bytes,
6523 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
6524 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
6525 get back to normal.)
6526 - If your requested entry or exit node has advertised bandwidth 0,
6528 - Be more greedy about filling up relay cells -- we try reading again
6529 once we've processed the stuff we read, in case enough has arrived
6530 to fill the last cell completely.
6531 - Apply NT service patch from Osamu Fujino. Still needs more work.
6534 Changes in version 0.0.9pre6 - 2004-11-15
6535 o Bugfixes on 0.0.8.1:
6536 - Fix assert failure on malformed socks4a requests.
6537 - Use identity comparison, not nickname comparison, to choose which
6538 half of circuit-ID-space each side gets to use. This is needed
6539 because sometimes we think of a router as a nickname, and sometimes
6540 as a hex ID, and we can't predict what the other side will do.
6541 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
6542 write() call will fail and we handle it there.
6543 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
6544 and smartlist_len, which are two major profiling offenders.
6546 o Bugfixes on 0.0.9pre5:
6547 - Fix a bug in read_all that was corrupting config files on windows.
6548 - When we're raising the max number of open file descriptors to
6549 'unlimited', don't log that we just raised it to '-1'.
6550 - Include event code with events, as required by control-spec.txt.
6551 - Don't give a fingerprint when clients do --list-fingerprint:
6552 it's misleading, because it will never be the same again.
6553 - Stop using strlcpy in tor_strndup, since it was slowing us
6555 - Remove warn on startup about missing cached-directory file.
6556 - Make kill -USR1 work again.
6557 - Hibernate if we start tor during the "wait for wakeup-time" phase
6558 of an accounting interval. Log our hibernation plans better.
6559 - Authoritative dirservers now also cache their directory, so they
6560 have it on start-up.
6563 - Fetch running-routers; cache running-routers; compress
6564 running-routers; serve compressed running-routers.z
6565 - Add NSI installer script contributed by J Doe.
6566 - Commit VC6 and VC7 workspace/project files.
6567 - Commit a tor.spec for making RPM files, with help from jbash.
6568 - Add contrib/torctl.in contributed by Glenn Fink.
6569 - Implement the control-spec's SAVECONF command, to write your
6570 configuration to torrc.
6571 - Get cookie authentication for the controller closer to working.
6572 - Include control-spec.txt in the tarball.
6573 - When set_conf changes our server descriptor, upload a new copy.
6574 But don't upload it too often if there are frequent changes.
6575 - Document authentication config in man page, and document signals
6577 - Clean up confusing parts of man page and torrc.sample.
6578 - Make expand_filename handle ~ and ~username.
6579 - Use autoconf to enable largefile support where necessary. Use
6580 ftello where available, since ftell can fail at 2GB.
6581 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
6582 log more informatively.
6583 - Give a slightly more useful output for "tor -h".
6584 - Refuse application socks connections to port 0.
6585 - Check clock skew for verified servers, but allow unverified
6586 servers and clients to have any clock skew.
6587 - Break DirFetchPostPeriod into:
6588 - DirFetchPeriod for fetching full directory,
6589 - StatusFetchPeriod for fetching running-routers,
6590 - DirPostPeriod for posting server descriptor,
6591 - RendPostPeriod for posting hidden service descriptors.
6592 - Make sure the hidden service descriptors are at a random offset
6593 from each other, to hinder linkability.
6596 Changes in version 0.0.9pre5 - 2004-11-09
6597 o Bugfixes on 0.0.9pre4:
6598 - Fix a seg fault in unit tests (doesn't affect main program).
6599 - Fix an assert bug where a hidden service provider would fail if
6600 the first hop of his rendezvous circuit was down.
6601 - Hidden service operators now correctly handle version 1 style
6602 INTRODUCE1 cells (nobody generates them still, so not a critical
6604 - If do_hup fails, actually notice.
6605 - Handle more errnos from accept() without closing the listener.
6606 Some OpenBSD machines were closing their listeners because
6607 they ran out of file descriptors.
6608 - Send resolve cells to exit routers that are running a new
6609 enough version of the resolve code to work right.
6610 - Better handling of winsock includes on non-MSV win32 compilers.
6611 - Some people had wrapped their tor client/server in a script
6612 that would restart it whenever it died. This did not play well
6613 with our "shut down if your version is obsolete" code. Now people
6614 don't fetch a new directory if their local cached version is
6616 - Make our autogen.sh work on ksh as well as bash.
6619 - Hibernation: New config option "AccountingMaxKB" lets you
6620 set how many KBytes per month you want to allow your server to
6621 consume. Rather than spreading those bytes out evenly over the
6622 month, we instead hibernate for some of the month and pop up
6623 at a deterministic time, work until the bytes are consumed, then
6624 hibernate again. Config option "MonthlyAccountingStart" lets you
6625 specify which day of the month your billing cycle starts on.
6626 - Control interface: a separate program can now talk to your
6627 client/server over a socket, and get/set config options, receive
6628 notifications of circuits and streams starting/finishing/dying,
6629 bandwidth used, etc. The next step is to get some GUIs working.
6630 Let us know if you want to help out. See doc/control-spec.txt .
6631 - Ship a contrib/tor-control.py as an example script to interact
6632 with the control port.
6633 - "tor --hash-password zzyxz" will output a salted password for
6634 use in authenticating to the control interface.
6635 - New log format in config:
6636 "Log minsev[-maxsev] stdout|stderr|syslog" or
6637 "Log minsev[-maxsev] file /var/foo"
6640 - DirPolicy config option, to let people reject incoming addresses
6641 from their dirserver.
6642 - "tor --list-fingerprint" will list your identity key fingerprint
6644 - Add "pass" target for RedirectExit, to make it easier to break
6645 out of a sequence of RedirectExit rules.
6646 - Clients now generate a TLS cert too, in preparation for having
6647 them act more like real nodes.
6648 - Ship src/win32/ in the tarball, so people can use it to build.
6649 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
6651 - New "router-status" line in directory, to better bind each verified
6652 nickname to its identity key.
6653 - Deprecate unofficial config option abbreviations, and abbreviations
6654 not on the command line.
6655 - Add a pure-C tor-resolve implementation.
6656 - Use getrlimit and friends to ensure we can reach MaxConn (currently
6657 1024) file descriptors.
6659 o Code security improvements, inspired by Ilja:
6660 - Replace sprintf with snprintf. (I think they were all safe, but
6662 - Replace strcpy/strncpy with strlcpy in more places.
6663 - Avoid strcat; use snprintf or strlcat instead.
6664 - snprintf wrapper with consistent (though not C99) overflow behavior.
6667 Changes in version 0.0.9pre4 - 2004-10-17
6668 o Bugfixes on 0.0.9pre3:
6669 - If the server doesn't specify an exit policy, use the real default
6670 exit policy, not reject *:*.
6671 - Ignore fascistfirewall when uploading/downloading hidden service
6672 descriptors, since we go through Tor for those; and when using
6673 an HttpProxy, since we assume it can reach them all.
6674 - When looking for an authoritative dirserver, use only the ones
6675 configured at boot. Don't bother looking in the directory.
6676 - The rest of the fix for get_default_conf_file() on older win32.
6677 - Make 'Routerfile' config option obsolete.
6680 - New 'MyFamily nick1,...' config option for a server to
6681 specify other servers that shouldn't be used in the same circuit
6682 with it. Only believed if nick1 also specifies us.
6683 - New 'NodeFamily nick1,nick2,...' config option for a client to
6684 specify nodes that it doesn't want to use in the same circuit.
6685 - New 'Redirectexit pattern address:port' config option for a
6686 server to redirect exit connections, e.g. to a local squid.
6689 Changes in version 0.0.9pre3 - 2004-10-13
6690 o Bugfixes on 0.0.8.1:
6691 - Better torrc example lines for dirbindaddress and orbindaddress.
6692 - Improved bounds checking on parsed ints (e.g. config options and
6693 the ones we find in directories.)
6694 - Better handling of size_t vs int, so we're more robust on 64
6696 - Fix the rest of the bug where a newly started OR would appear
6697 as unverified even after we've added his fingerprint and hupped
6699 - Fix a bug from 0.0.7: when read() failed on a stream, we would
6700 close it without sending back an end. So 'connection refused'
6701 would simply be ignored and the user would get no response.
6703 o Bugfixes on 0.0.9pre2:
6704 - Serving the cached-on-disk directory to people is bad. We now
6705 provide no directory until we've fetched a fresh one.
6706 - Workaround for bug on windows where cached-directories get crlf
6708 - Make get_default_conf_file() work on older windows too.
6709 - If we write a *:* exit policy line in the descriptor, don't write
6710 any more exit policy lines.
6713 - Use only 0.0.9pre1 and later servers for resolve cells.
6714 - Make the dirservers file obsolete.
6715 - Include a dir-signing-key token in directories to tell the
6716 parsing entity which key is being used to sign.
6717 - Remove the built-in bulky default dirservers string.
6718 - New config option "Dirserver %s:%d [fingerprint]", which can be
6719 repeated as many times as needed. If no dirservers specified,
6720 default to moria1,moria2,tor26.
6721 - Make moria2 advertise a dirport of 80, so people behind firewalls
6722 will be able to get a directory.
6723 - Http proxy support
6724 - Dirservers translate requests for http://%s:%d/x to /x
6725 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
6726 be routed through this host.
6727 - Clients ask for /tor/x rather than /x for new enough dirservers.
6728 This way we can one day coexist peacefully with apache.
6729 - Clients specify a "Host: %s%d" http header, to be compatible
6730 with more proxies, and so running squid on an exit node can work.
6733 Changes in version 0.0.8.1 - 2004-10-13
6735 - Fix a seg fault that can be triggered remotely for Tor
6736 clients/servers with an open dirport.
6737 - Fix a rare assert trigger, where routerinfos for entries in
6738 our cpath would expire while we're building the path.
6739 - Fix a bug in OutboundBindAddress so it (hopefully) works.
6740 - Fix a rare seg fault for people running hidden services on
6741 intermittent connections.
6742 - Fix a bug in parsing opt keywords with objects.
6743 - Fix a stale pointer assert bug when a stream detaches and
6745 - Fix a string format vulnerability (probably not exploitable)
6746 in reporting stats locally.
6747 - Fix an assert trigger: sometimes launching circuits can fail
6748 immediately, e.g. because too many circuits have failed recently.
6749 - Fix a compile warning on 64 bit platforms.
6752 Changes in version 0.0.9pre2 - 2004-10-03
6754 - Make fetching a cached directory work for 64-bit platforms too.
6755 - Make zlib.h a required header, not an optional header.
6758 Changes in version 0.0.9pre1 - 2004-10-01
6760 - Stop using separate defaults for no-config-file and
6761 empty-config-file. Now you have to explicitly turn off SocksPort,
6762 if you don't want it open.
6763 - Fix a bug in OutboundBindAddress so it (hopefully) works.
6764 - Improve man page to mention more of the 0.0.8 features.
6765 - Fix a rare seg fault for people running hidden services on
6766 intermittent connections.
6767 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
6769 - Fix more dns related bugs: send back resolve_failed and end cells
6770 more reliably when the resolve fails, rather than closing the
6771 circuit and then trying to send the cell. Also attach dummy resolve
6772 connections to a circuit *before* calling dns_resolve(), to fix
6773 a bug where cached answers would never be sent in RESOLVED cells.
6774 - When we run out of disk space, or other log writing error, don't
6775 crash. Just stop logging to that log and continue.
6776 - We were starting to daemonize before we opened our logs, so if
6777 there were any problems opening logs, we would complain to stderr,
6778 which wouldn't work, and then mysteriously exit.
6779 - Fix a rare bug where sometimes a verified OR would connect to us
6780 before he'd uploaded his descriptor, which would cause us to
6781 assign conn->nickname as though he's unverified. Now we look through
6782 the fingerprint list to see if he's there.
6783 - Fix a rare assert trigger, where routerinfos for entries in
6784 our cpath would expire while we're building the path.
6787 - Clients can ask dirservers for /dir.z to get a compressed version
6788 of the directory. Only works for servers running 0.0.9, of course.
6789 - Make clients cache directories and use them to seed their router
6790 lists at startup. This means clients have a datadir again.
6791 - Configuration infrastructure support for warning on obsolete
6793 - Respond to content-encoding headers by trying to uncompress as
6795 - Reply with a deflated directory when a client asks for "dir.z".
6796 We could use allow-encodings instead, but allow-encodings isn't
6797 specified in HTTP 1.0.
6798 - Raise the max dns workers from 50 to 100.
6799 - Discourage people from setting their dirfetchpostperiod more often
6800 than once per minute.
6801 - Protect dirservers from overzealous descriptor uploading -- wait
6802 10 seconds after directory gets dirty, before regenerating.
6805 Changes in version 0.0.8 - 2004-08-25
6806 o Port it to SunOS 5.9 / Athena
6809 Changes in version 0.0.8rc2 - 2004-08-20
6810 o Make it compile on cygwin again.
6811 o When picking unverified routers, skip those with low uptime and/or
6812 low bandwidth, depending on what properties you care about.
6815 Changes in version 0.0.8rc1 - 2004-08-18
6816 o Changes from 0.0.7.3:
6818 - Fix assert triggers: if the other side returns an address 0.0.0.0,
6819 don't put it into the client dns cache.
6820 - If a begin failed due to exit policy, but we believe the IP address
6821 should have been allowed, switch that router to exitpolicy reject *:*
6822 until we get our next directory.
6824 - Clients choose nodes proportional to advertised bandwidth.
6825 - Avoid using nodes with low uptime as introduction points.
6826 - Handle servers with dynamic IP addresses: don't replace
6827 options->Address with the resolved one at startup, and
6828 detect our address right before we make a routerinfo each time.
6829 - 'FascistFirewall' option to pick dirservers and ORs on specific
6830 ports; plus 'FirewallPorts' config option to tell FascistFirewall
6831 which ports are open. (Defaults to 80,443)
6832 - Be more aggressive about trying to make circuits when the network
6833 has changed (e.g. when you unsuspend your laptop).
6834 - Check for time skew on http headers; report date in response to
6836 - If the entrynode config line has only one node, don't pick it as
6838 - Add strict{entry|exit}nodes config options. If set to 1, then
6839 we refuse to build circuits that don't include the specified entry
6841 - OutboundBindAddress config option, to bind to a specific
6842 IP address for outgoing connect()s.
6843 - End truncated log entries (e.g. directories) with "[truncated]".
6845 o Patches to 0.0.8preX:
6847 - Patches to compile and run on win32 again (maybe)?
6848 - Fix crash when looking for ~/.torrc with no $HOME set.
6849 - Fix a race bug in the unit tests.
6850 - Handle verified/unverified name collisions better when new
6851 routerinfo's arrive in a directory.
6852 - Sometimes routers were getting entered into the stats before
6853 we'd assigned their identity_digest. Oops.
6854 - Only pick and establish intro points after we've gotten a
6857 - AllowUnverifiedNodes config option to let circuits choose no-name
6858 routers in entry,middle,exit,introduction,rendezvous positions.
6859 Allow middle and rendezvous positions by default.
6860 - Add a man page for tor-resolve.
6863 Changes in version 0.0.7.3 - 2004-08-12
6864 o Stop dnsworkers from triggering an assert failure when you
6865 ask them to resolve the host "".
6868 Changes in version 0.0.8pre3 - 2004-08-09
6869 o Changes from 0.0.7.2:
6870 - Allow multiple ORs with same nickname in routerlist -- now when
6871 people give us one identity key for a nickname, then later
6872 another, we don't constantly complain until the first expires.
6873 - Remember used bandwidth (both in and out), and publish 15-minute
6874 snapshots for the past day into our descriptor.
6875 - You can now fetch $DIRURL/running-routers to get just the
6876 running-routers line, not the whole descriptor list. (But
6877 clients don't use this yet.)
6878 - When people mistakenly use Tor as an http proxy, point them
6879 at the tor-doc.html rather than the INSTALL.
6880 - Remove our mostly unused -- and broken -- hex_encode()
6881 function. Use base16_encode() instead. (Thanks to Timo Lindfors
6882 for pointing out this bug.)
6883 - Rotate onion keys every 12 hours, not every 2 hours, so we have
6884 fewer problems with people using the wrong key.
6885 - Change the default exit policy to reject the default edonkey,
6886 kazaa, gnutella ports.
6887 - Add replace_file() to util.[ch] to handle win32's rename().
6889 o Changes from 0.0.8preX:
6890 - Fix two bugs in saving onion keys to disk when rotating, so
6891 hopefully we'll get fewer people using old onion keys.
6892 - Fix an assert error that was making SocksPolicy not work.
6893 - Be willing to expire routers that have an open dirport -- it's
6894 just the authoritative dirservers we want to not forget.
6895 - Reject tor-resolve requests for .onion addresses early, so we
6896 don't build a whole rendezvous circuit and then fail.
6897 - When you're warning a server that he's unverified, don't cry
6899 - Fix a race condition: don't try to extend onto a connection
6900 that's still handshaking.
6901 - For servers in clique mode, require the conn to be open before
6902 you'll choose it for your path.
6903 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
6904 end relay cell, etc.
6905 - Measure bandwidth capacity over the last 24 hours, not just 12
6906 - Bugfix: authoritative dirservers were making and signing a new
6907 directory for each client, rather than reusing the cached one.
6910 Changes in version 0.0.8pre2 - 2004-08-04
6911 o Changes from 0.0.7.2:
6913 - Check directory signature _before_ you decide whether you're
6914 you're running an obsolete version and should exit.
6915 - Check directory signature _before_ you parse the running-routers
6916 list to decide who's running or verified.
6917 - Bugfixes and features:
6918 - Check return value of fclose while writing to disk, so we don't
6919 end up with broken files when servers run out of disk space.
6920 - Log a warning if the user uses an unsafe socks variant, so people
6921 are more likely to learn about privoxy or socat.
6922 - Dirservers now include RFC1123-style dates in the HTTP headers,
6923 which one day we will use to better detect clock skew.
6925 o Changes from 0.0.8pre1:
6926 - Make it compile without warnings again on win32.
6927 - Log a warning if you're running an unverified server, to let you
6928 know you might want to get it verified.
6929 - Only pick a default nickname if you plan to be a server.
6932 Changes in version 0.0.8pre1 - 2004-07-23
6934 - Made our unit tests compile again on OpenBSD 3.5, and tor
6935 itself compile again on OpenBSD on a sparc64.
6936 - We were neglecting milliseconds when logging on win32, so
6937 everything appeared to happen at the beginning of each second.
6940 - 'Extend' relay cell payloads now include the digest of the
6941 intended next hop's identity key. Now we can verify that we're
6942 extending to the right router, and also extend to routers we
6943 hadn't heard of before.
6946 - Tor nodes can now act as relays (with an advertised ORPort)
6947 without being manually verified by the dirserver operators.
6948 - Uploaded descriptors of unverified routers are now accepted
6949 by the dirservers, and included in the directory.
6950 - Verified routers are listed by nickname in the running-routers
6951 list; unverified routers are listed as "$<fingerprint>".
6952 - We now use hash-of-identity-key in most places rather than
6953 nickname or addr:port, for improved security/flexibility.
6954 - To avoid Sybil attacks, paths still use only verified servers.
6955 But now we have a chance to play around with hybrid approaches.
6956 - Nodes track bandwidth usage to estimate capacity (not used yet).
6957 - ClientOnly option for nodes that never want to become servers.
6958 - Directory caching.
6959 - "AuthoritativeDir 1" option for the official dirservers.
6960 - Now other nodes (clients and servers) will cache the latest
6961 directory they've pulled down.
6962 - They can enable their DirPort to serve it to others.
6963 - Clients will pull down a directory from any node with an open
6964 DirPort, and check the signature/timestamp correctly.
6965 - Authoritative dirservers now fetch directories from other
6966 authdirservers, to stay better synced.
6967 - Running-routers list tells who's down also, along with noting
6968 if they're verified (listed by nickname) or unverified (listed
6970 - Allow dirservers to serve running-router list separately.
6971 This isn't used yet.
6972 - ORs connect-on-demand to other ORs
6973 - If you get an extend cell to an OR you're not connected to,
6974 connect, handshake, and forward the create cell.
6975 - The authoritative dirservers stay connected to everybody,
6976 and everybody stays connected to 0.0.7 servers, but otherwise
6977 clients/servers expire unused connections after 5 minutes.
6978 - When servers get a sigint, they delay 30 seconds (refusing new
6979 connections) then exit. A second sigint causes immediate exit.
6980 - File and name management:
6981 - Look for .torrc if no CONFDIR "torrc" is found.
6982 - If no datadir is defined, then choose, make, and secure ~/.tor
6984 - If torrc not found, exitpolicy reject *:*.
6985 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
6986 - If no nickname is defined, derive default from hostname.
6987 - Rename secret key files, e.g. identity.key -> secret_id_key,
6988 to discourage people from mailing their identity key to tor-ops.
6989 - Refuse to build a circuit before the directory has arrived --
6990 it won't work anyway, since you won't know the right onion keys
6992 - Try other dirservers immediately if the one you try is down. This
6993 should tolerate down dirservers better now.
6994 - Parse tor version numbers so we can do an is-newer-than check
6995 rather than an is-in-the-list check.
6996 - New socks command 'resolve', to let us shim gethostbyname()
6998 - A 'tor_resolve' script to access the socks resolve functionality.
6999 - A new socks-extensions.txt doc file to describe our
7000 interpretation and extensions to the socks protocols.
7001 - Add a ContactInfo option, which gets published in descriptor.
7002 - Publish OR uptime in descriptor (and thus in directory) too.
7003 - Write tor version at the top of each log file
7004 - New docs in the tarball:
7006 - Document that you should proxy your SSL traffic too.
7009 Changes in version 0.0.7.2 - 2004-07-07
7010 o A better fix for the 0.0.0.0 problem, that will hopefully
7011 eliminate the remaining related assertion failures.
7014 Changes in version 0.0.7.1 - 2004-07-04
7015 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
7016 since internally we use 0.0.0.0 to signify "not yet resolved".
7019 Changes in version 0.0.7 - 2004-06-07
7020 o Updated the man page to reflect the new features.
7023 Changes in version 0.0.7rc2 - 2004-06-06
7024 o Changes from 0.0.7rc1:
7025 - Make it build on Win32 again.
7026 o Changes from 0.0.6.2:
7027 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
7031 Changes in version 0.0.7rc1 - 2004-06-02
7033 - On sighup, we were adding another log without removing the first
7034 one. So log messages would get duplicated n times for n sighups.
7035 - Several cases of using a connection after we'd freed it. The
7036 problem was that connections that are pending resolve are in both
7037 the pending_resolve tree, and also the circuit's resolving_streams
7038 list. When you want to remove one, you must remove it from both.
7039 - Fix a double-mark-for-close where an end cell arrived for a
7040 resolving stream, and then the resolve failed.
7041 - Check directory signatures based on name of signer, not on whom
7042 we got the directory from. This will let us cache directories more
7045 - Crank up some of our constants to handle more users.
7048 Changes in version 0.0.7pre1 - 2004-06-02
7049 o Fixes for crashes and other obnoxious bugs:
7050 - Fix an epipe bug: sometimes when directory connections failed
7051 to connect, we would give them a chance to flush before closing
7053 - When we detached from a circuit because of resolvefailed, we
7054 would immediately try the same circuit twice more, and then
7055 give up on the resolve thinking we'd tried three different
7057 - Limit the number of intro circuits we'll attempt to build for a
7058 hidden service per 15-minute period.
7059 - Check recommended-software string *early*, before actually parsing
7060 the directory. Thus we can detect an obsolete version and exit,
7061 even if the new directory format doesn't parse.
7062 o Fixes for security bugs:
7063 - Remember which nodes are dirservers when you startup, and if a
7064 random OR enables his dirport, don't automatically assume he's
7065 a trusted dirserver.
7067 - Directory connections were asking the wrong poll socket to
7068 start writing, and not asking themselves to start writing.
7069 - When we detached from a circuit because we sent a begin but
7070 didn't get a connected, we would use it again the first time;
7071 but after that we would correctly switch to a different one.
7072 - Stop warning when the first onion decrypt attempt fails; they
7073 will sometimes legitimately fail now that we rotate keys.
7074 - Override unaligned-access-ok check when $host_cpu is ia64 or
7075 arm. Apparently they allow it but the kernel whines.
7076 - Dirservers try to reconnect periodically too, in case connections
7078 - Fix some memory leaks in directory servers.
7079 - Allow backslash in Win32 filenames.
7080 - Made Tor build complain-free on FreeBSD, hopefully without
7081 breaking other BSD builds. We'll see.
7083 - Doxygen markup on all functions and global variables.
7084 - Make directory functions update routerlist, not replace it. So
7085 now directory disagreements are not so critical a problem.
7086 - Remove the upper limit on number of descriptors in a dirserver's
7087 directory (not that we were anywhere close).
7088 - Allow multiple logfiles at different severity ranges.
7089 - Allow *BindAddress to specify ":port" rather than setting *Port
7090 separately. Allow multiple instances of each BindAddress config
7091 option, so you can bind to multiple interfaces if you want.
7092 - Allow multiple exit policy lines, which are processed in order.
7093 Now we don't need that huge line with all the commas in it.
7094 - Enable accept/reject policies on SOCKS connections, so you can bind
7095 to 0.0.0.0 but still control who can use your OP.
7098 Changes in version 0.0.6.2 - 2004-05-16
7099 o Our integrity-checking digest was checking only the most recent cell,
7100 not the previous cells like we'd thought.
7101 Thanks to Stefan Mark for finding the flaw!
7104 Changes in version 0.0.6.1 - 2004-05-06
7105 o Fix two bugs in our AES counter-mode implementation (this affected
7106 onion-level stream encryption, but not TLS-level). It turns
7107 out we were doing something much more akin to a 16-character
7108 polyalphabetic cipher. Oops.
7109 Thanks to Stefan Mark for finding the flaw!
7110 o Retire moria3 as a directory server, and add tor26 as a directory
7114 Changes in version 0.0.6 - 2004-05-02
7118 Changes in version 0.0.6rc4 - 2004-05-01
7119 o Update the built-in dirservers list to use the new directory format
7120 o Fix a rare seg fault: if a node offering a hidden service attempts
7121 to build a circuit to Alice's rendezvous point and fails before it
7122 reaches the last hop, it retries with a different circuit, but
7124 o Handle windows socket errors correctly.
7127 Changes in version 0.0.6rc3 - 2004-04-28
7128 o Don't expire non-general excess circuits (if we had enough
7129 circuits open, we were expiring rendezvous circuits -- even
7130 when they had a stream attached. oops.)
7131 o Fetch randomness from /dev/urandom better (not via fopen/fread)
7132 o Better debugging for tls errors
7133 o Some versions of openssl have an SSL_pending function that erroneously
7134 returns bytes when there is a non-application record pending.
7135 o Set Content-Type on the directory and hidserv descriptor.
7136 o Remove IVs from cipher code, since AES-ctr has none.
7137 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
7138 o We were using an array of length zero in a few places.
7139 o win32's gethostbyname can't resolve an IP to an IP.
7140 o win32's close can't close a socket.
7143 Changes in version 0.0.6rc2 - 2004-04-26
7144 o Fix a bug where we were closing tls connections intermittently.
7145 It turns out openssl keeps its errors around -- so if an error
7146 happens, and you don't ask about it, and then another openssl
7147 operation happens and succeeds, and you ask if there was an error,
7148 it tells you about the first error. Fun fun.
7149 o Fix a bug that's been lurking since 27 may 03 (!)
7150 When passing back a destroy cell, we would use the wrong circ id.
7151 'Mostly harmless', but still worth fixing.
7152 o Since we don't support truncateds much, don't bother sending them;
7153 just close the circ.
7154 o check for <machine/limits.h> so we build on NetBSD again (I hope).
7155 o don't crash if a conn that sent a begin has suddenly lost its circuit
7156 (this was quite rare).
7159 Changes in version 0.0.6rc1 - 2004-04-25
7160 o We now rotate link (tls context) keys and onion keys.
7161 o CREATE cells now include oaep padding, so you can tell
7162 if you decrypted them correctly.
7163 o Add bandwidthburst to server descriptor.
7164 o Directories now say which dirserver signed them.
7165 o Use a tor_assert macro that logs failed assertions too.
7168 Changes in version 0.0.6pre5 - 2004-04-18
7169 o changes from 0.0.6pre4:
7170 - make tor build on broken freebsd 5.2 installs
7171 - fix a failed assert when you try an intro point, get a nack, and try
7172 a second one and it works.
7173 - when alice uses a port that the hidden service doesn't accept,
7174 it now sends back an end cell (denied by exit policy). otherwise
7175 alice would just have to wait to time out.
7176 - fix another rare bug: when we had tried all the intro
7177 points for a hidden service, we fetched the descriptor
7178 again, but we left our introcirc thinking it had already
7179 sent an intro, so it kept waiting for a response...
7180 - bugfix: when you sleep your hidden-service laptop, as soon
7181 as it wakes up it tries to upload a service descriptor, but
7182 socketpair fails for some reason (localhost not up yet?).
7183 now we simply give up on that upload, and we'll try again later.
7184 i'd still like to find the bug though.
7185 - if an intro circ waiting for an ack dies before getting one, then
7187 - we were reusing stale service descriptors and refetching usable
7191 Changes in version 0.0.6pre4 - 2004-04-14
7192 o changes from 0.0.6pre3:
7193 - when bob fails to connect to the rendezvous point, and his
7194 circ didn't fail because of the rendezvous point itself, then
7195 he retries a couple of times
7196 - we expire introduction and rendezvous circs more thoroughly
7197 (sometimes they were hanging around forever)
7198 - we expire unattached rendezvous streams that have been around
7199 too long (they were sticking around forever).
7200 - fix a measly fencepost error that was crashing everybody with
7204 Changes in version 0.0.6pre3 - 2004-04-14
7205 o changes from 0.0.6pre2:
7206 - make hup work again
7207 - fix some memory leaks for dirservers
7208 - allow more skew in rendezvous descriptor timestamps, to help
7209 handle people like blanu who don't know what time it is
7210 - normal circs are 3 hops, but some rend/intro circs are 4, if
7211 the initiator doesn't get to choose the last hop
7212 - send acks for introductions, so alice can know whether to try
7214 - bob publishes intro points more correctly
7215 o changes from 0.0.5:
7216 - fix an assert trigger that's been plaguing us since the days
7217 of 0.0.2prexx (thanks weasel!)
7218 - retry stream correctly when we fail to connect because of
7219 exit-policy-reject (should try another) or can't-resolve-address
7220 (also should try another, because dns on random internet servers
7222 - when we hup a dirserver and we've *removed* a server from the
7223 approved-routers list, now we remove that server from the
7224 in-memory directories too
7227 Changes in version 0.0.6pre2 - 2004-04-08
7228 o We fixed our base32 implementation. Now it works on all architectures.
7231 Changes in version 0.0.6pre1 - 2004-04-08
7233 - Hidden services and rendezvous points are implemented. Go to
7234 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
7235 hidden services. (This only works via a socks4a proxy such as
7236 Privoxy, and currently it's quite slow.)
7239 Changes in version 0.0.5 - 2004-03-30
7243 Changes in version 0.0.5rc3 - 2004-03-29
7244 o Install torrc as torrc.sample -- we no longer clobber your
7246 o Re-enable recommendedversion checking (we broke it in rc2, oops)
7247 o Add in a 'notice' log level for things the operator should hear
7248 but that aren't warnings
7251 Changes in version 0.0.5rc2 - 2004-03-29
7252 o Hold socks connection open until reply is flushed (if possible)
7253 o Make exit nodes resolve IPs to IPs immediately, rather than asking
7254 the dns farm to do it.
7255 o Fix c99 aliasing warnings in rephist.c
7256 o Don't include server descriptors that are older than 24 hours in the
7258 o Give socks 'reject' replies their whole 15s to attempt to flush,
7259 rather than seeing the 60s timeout and assuming the flush had failed.
7260 o Clean automake droppings from the cvs repository
7263 Changes in version 0.0.5rc1 - 2004-03-28
7264 o Fix mangled-state bug in directory fetching (was causing sigpipes).
7265 o Only build circuits after we've fetched the directory: clients were
7266 using only the directory servers before they'd fetched a directory.
7267 This also means longer startup time; so it goes.
7268 o Fix an assert trigger where an OP would fail to handshake, and we'd
7269 expect it to have a nickname.
7270 o Work around a tsocks bug: do a socks reject when AP connection dies
7271 early, else tsocks goes into an infinite loop.
7274 Changes in version 0.0.4 - 2004-03-26
7275 o When connecting to a dirserver or OR and the network is down,
7279 Changes in version 0.0.3 - 2004-03-26
7280 o Warn and fail if server chose a nickname with illegal characters
7281 o Port to Solaris and Sparc:
7282 - include missing header fcntl.h
7283 - have autoconf find -lsocket -lnsl automatically
7284 - deal with hardware word alignment
7285 - make uname() work (solaris has a different return convention)
7286 - switch from using signal() to sigaction()
7287 o Preliminary work on reputation system:
7288 - Keep statistics on success/fail of connect attempts; they're published
7289 by kill -USR1 currently.
7290 - Add a RunTesting option to try to learn link state by creating test
7291 circuits, even when SocksPort is off.
7292 - Remove unused open circuits when there are too many.
7295 Changes in version 0.0.2 - 2004-03-19
7296 - Include strlcpy and strlcat for safer string ops
7297 - define INADDR_NONE so we compile (but still not run) on solaris
7300 Changes in version 0.0.2pre27 - 2004-03-14
7302 - Allow internal tor networks (we were rejecting internal IPs,
7303 now we allow them if they're set explicitly).
7304 - And fix a few endian issues.
7307 Changes in version 0.0.2pre26 - 2004-03-14
7309 - If a stream times out after 15s without a connected cell, don't
7310 try that circuit again: try a new one.
7311 - Retry streams at most 4 times. Then give up.
7312 - When a dirserver gets a descriptor from an unknown router, it
7313 logs its fingerprint (so the dirserver operator can choose to
7314 accept it even without mail from the server operator).
7315 - Inform unapproved servers when we reject their descriptors.
7316 - Make tor build on Windows again. It works as a client, who knows
7318 - Clearer instructions in the torrc for how to set up a server.
7319 - Be more efficient about reading fd's when our global token bucket
7320 (used for rate limiting) becomes empty.
7322 - Stop asserting that computers always go forward in time. It's
7324 - When we sent a cell (e.g. destroy) and then marked an OR connection
7325 expired, we might close it before finishing a flush if the other
7326 side isn't reading right then.
7327 - Don't allow dirservers to start if they haven't defined
7329 - We were caching transient dns failures. Oops.
7330 - Prevent servers from publishing an internal IP as their address.
7331 - Address a strcat vulnerability in circuit.c
7334 Changes in version 0.0.2pre25 - 2004-03-04
7336 - Put the OR's IP in its router descriptor, not its fqdn. That way
7337 we'll stop being stalled by gethostbyname for nodes with flaky dns,
7340 - If the user typed in an address that didn't resolve, the server
7344 Changes in version 0.0.2pre24 - 2004-03-03
7346 - Fix an assertion failure in dns.c, where we were trying to dequeue
7347 a pending dns resolve even if it wasn't pending
7348 - Fix a spurious socks5 warning about still trying to write after the
7349 connection is finished.
7350 - Hold certain marked_for_close connections open until they're finished
7351 flushing, rather than losing bytes by closing them too early.
7352 - Correctly report the reason for ending a stream
7353 - Remove some duplicate calls to connection_mark_for_close
7354 - Put switch_id and start_daemon earlier in the boot sequence, so it
7355 will actually try to chdir() to options.DataDirectory
7356 - Make 'make test' exit(1) if a test fails; fix some unit tests
7357 - Make tor fail when you use a config option it doesn't know about,
7358 rather than warn and continue.
7359 - Make --version work
7360 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
7363 Changes in version 0.0.2pre23 - 2004-02-29
7365 - Print a statement when the first circ is finished, so the user
7367 - If a relay cell is unrecognized at the end of the circuit,
7368 send back a destroy. (So attacks to mutate cells are more
7370 - New config option 'excludenodes' to avoid certain nodes for circuits.
7371 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
7372 so you can collect coredumps there.
7374 - Fix a bug in tls flushing where sometimes data got wedged and
7375 didn't flush until more data got sent. Hopefully this bug was
7376 a big factor in the random delays we were seeing.
7377 - Make 'connected' cells include the resolved IP, so the client
7378 dns cache actually gets populated.
7379 - Disallow changing from ORPort=0 to ORPort>0 on hup.
7380 - When we time-out on a stream and detach from the circuit, send an
7381 end cell down it first.
7382 - Only warn about an unknown router (in exitnodes, entrynodes,
7383 excludenodes) after we've fetched a directory.
7386 Changes in version 0.0.2pre22 - 2004-02-26
7388 - Servers publish less revealing uname information in descriptors.
7389 - More memory tracking and assertions, to crash more usefully when
7391 - If the default torrc isn't there, just use some default defaults.
7392 Plus provide an internal dirservers file if they don't have one.
7393 - When the user tries to use Tor as an http proxy, give them an http
7394 501 failure explaining that we're a socks proxy.
7395 - Dump a new router.desc on hup, to help confused people who change
7396 their exit policies and then wonder why router.desc doesn't reflect
7398 - Clean up the generic tor.sh init script that we ship with.
7400 - If the exit stream is pending on the resolve, and a destroy arrives,
7401 then the stream wasn't getting removed from the pending list. I
7402 think this was the one causing recent server crashes.
7403 - Use a more robust poll on OSX 10.3, since their poll is flaky.
7404 - When it couldn't resolve any dirservers, it was useless from then on.
7405 Now it reloads the RouterFile (or default dirservers) if it has no
7407 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
7408 many users don't even *have* a /usr/local/sbin/.
7411 Changes in version 0.0.2pre21 - 2004-02-18
7413 - There's a ChangeLog file that actually reflects the changelog.
7414 - There's a 'torify' wrapper script, with an accompanying
7415 tor-tsocks.conf, that simplifies the process of using tsocks for
7416 tor. It even has a man page.
7417 - The tor binary gets installed to sbin rather than bin now.
7418 - Retry streams where the connected cell hasn't arrived in 15 seconds
7419 - Clean up exit policy handling -- get the default out of the torrc,
7420 so we can update it without forcing each server operator to fix
7422 - Allow imaps and pop3s in default exit policy
7424 - Prevent picking middleman nodes as the last node in the circuit
7427 Changes in version 0.0.2pre20 - 2004-01-30
7429 - We now have a deb package, and it's in debian unstable. Go to
7431 - I've split the TotalBandwidth option into BandwidthRate (how many
7432 bytes per second you want to allow, long-term) and
7433 BandwidthBurst (how many bytes you will allow at once before the cap
7434 kicks in). This better token bucket approach lets you, say, set
7435 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
7436 performance while not exceeding your monthly bandwidth quota.
7437 - Push out a tls record's worth of data once you've got it, rather
7438 than waiting until you've read everything waiting to be read. This
7439 may improve performance by pipelining better. We'll see.
7440 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
7441 from failed circuits (if they haven't been connected yet) and attach
7443 - Expire old streams that haven't managed to connect. Some day we'll
7444 have them reattach to new circuits instead.
7447 - Fix several memory leaks that were causing servers to become bloated
7449 - Fix a few very rare assert triggers. A few more remain.
7450 - Setuid to User _before_ complaining about running as root.
7453 Changes in version 0.0.2pre19 - 2004-01-07
7455 - Fix deadlock condition in dns farm. We were telling a child to die by
7456 closing the parent's file descriptor to him. But newer children were
7457 inheriting the open file descriptor from the parent, and since they
7458 weren't closing it, the socket never closed, so the child never read
7459 eof, so he never knew to exit. Similarly, dns workers were holding
7460 open other sockets, leading to all sorts of chaos.
7461 - New cleaner daemon() code for forking and backgrounding.
7462 - If you log to a file, it now prints an entry at the top of the
7463 logfile so you know it's working.
7464 - The onionskin challenge length was 30 bytes longer than necessary.
7465 - Started to patch up the spec so it's not quite so out of date.
7468 Changes in version 0.0.2pre18 - 2004-01-02
7470 - Fix endian issues with the 'integrity' field in the relay header.
7471 - Fix a potential bug where connections in state
7472 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
7475 Changes in version 0.0.2pre17 - 2003-12-30
7477 - Made --debuglogfile (or any second log file, actually) work.
7478 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
7479 adversary could force us into an infinite loop.
7482 - Each onionskin handshake now includes a hash of the computed key,
7483 to prove the server's identity and help perfect forward secrecy.
7484 - Changed cell size from 256 to 512 bytes (working toward compatibility
7486 - Changed cell length to 2 bytes, and moved it to the relay header.
7487 - Implemented end-to-end integrity checking for the payloads of
7489 - Separated streamid from 'recognized' (otherwise circuits will get
7490 messed up when we try to have streams exit from the middle). We
7491 use the integrity-checking to confirm that a cell is addressed to
7493 - Randomize the initial circid and streamid values, so an adversary who
7494 breaks into a node can't learn how many circuits or streams have
7498 Changes in version 0.0.2pre16 - 2003-12-14
7500 - Fixed a bug that made HUP trigger an assert
7501 - Fixed a bug where a circuit that immediately failed wasn't being
7502 counted as a failed circuit in counting retries.
7505 - Now we close the circuit when we get a truncated cell: otherwise we're
7506 open to an anonymity attack where a bad node in the path truncates
7507 the circuit and then we open streams at him.
7508 - Add port ranges to exit policies
7509 - Add a conservative default exit policy
7510 - Warn if you're running tor as root
7511 - on HUP, retry OR connections and close/rebind listeners
7512 - options.EntryNodes: try these nodes first when picking the first node
7513 - options.ExitNodes: if your best choices happen to include any of
7514 your preferred exit nodes, you choose among just those preferred
7516 - options.ExcludedNodes: nodes that are never picked in path building
7519 Changes in version 0.0.2pre15 - 2003-12-03
7520 o Robustness and bugfixes:
7521 - Sometimes clients would cache incorrect DNS resolves, which would
7522 really screw things up.
7523 - An OP that goes offline would slowly leak all its sockets and stop
7525 - A wide variety of bugfixes in exit node selection, exit policy
7526 handling, and processing pending streams when a new circuit is
7528 - Pick nodes for a path only from those the directory says are up
7529 - Choose randomly from all running dirservers, not always the first one
7530 - Increase allowed http header size for directory fetch.
7531 - Stop writing to stderr (if we're daemonized it will be closed).
7532 - Enable -g always, so cores will be more useful to me.
7533 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
7536 - Wrote a man page. It lists commonly used options.
7539 - Change default loglevel to warn.
7540 - Make PidFile default to null rather than littering in your CWD.
7541 - OnionRouter config option is now obsolete. Instead it just checks
7543 - Moved to a single unified torrc file for both clients and servers.
7546 Changes in version 0.0.2pre14 - 2003-11-29
7547 o Robustness and bugfixes:
7548 - Force the admin to make the DataDirectory himself
7549 - to get ownership/permissions right
7550 - so clients no longer make a DataDirectory and then never use it
7551 - fix bug where a client who was offline for 45 minutes would never
7552 pull down a directory again
7553 - fix (or at least hide really well) the dns assert bug that was
7554 causing server crashes
7555 - warnings and improved robustness wrt clockskew for certs
7556 - use the native daemon(3) to daemonize, when available
7557 - exit if bind() fails
7558 - exit if neither socksport nor orport is defined
7559 - include our own tor_timegm (Win32 doesn't have its own)
7560 - bugfix for win32 with lots of connections
7561 - fix minor bias in PRNG
7562 - make dirserver more robust to corrupt cached directory
7565 - Wrote the design document (woo)
7567 o Circuit building and exit policies:
7568 - Circuits no longer try to use nodes that the directory has told them
7570 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
7571 bitcounts (18.0.0.0/8).
7572 - Make AP connections standby for a circuit if no suitable circuit
7573 exists, rather than failing
7574 - Circuits choose exit node based on addr/port, exit policies, and
7575 which AP connections are standing by
7576 - Bump min pathlen from 2 to 3
7577 - Relay end cells have a payload to describe why the stream ended.
7578 - If the stream failed because of exit policy, try again with a new
7580 - Clients have a dns cache to remember resolved addresses.
7581 - Notice more quickly when we have no working circuits
7584 - APPort is now called SocksPort
7585 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
7587 - RecommendedVersions is now a config variable rather than
7588 hardcoded (for dirservers)
7589 - Reloads config on HUP
7590 - Usage info on -h or --help
7591 - If you set User and Group config vars, it'll setu/gid to them.
7594 Changes in version 0.0.2pre13 - 2003-10-19
7595 o General stability:
7596 - SSL_write no longer fails when it returns WANTWRITE and the number
7597 of bytes in the buf has changed by the next SSL_write call.
7598 - Fix segfault fetching directory when network is down
7599 - Fix a variety of minor memory leaks
7600 - Dirservers reload the fingerprints file on HUP, so I don't have
7601 to take down the network when I approve a new router
7602 - Default server config file has explicit Address line to specify fqdn
7605 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
7606 - Make listener connections not ever alloc bufs
7608 o Autoconf improvements:
7609 - don't clobber an external CFLAGS in ./configure
7610 - Make install now works
7611 - create var/lib/tor on make install
7612 - autocreate a tor.sh initscript to help distribs
7613 - autocreate the torrc and sample-server-torrc with correct paths
7615 o Log files and Daemonizing now work:
7616 - If --DebugLogFile is specified, log to it at -l debug
7617 - If --LogFile is specified, use it instead of commandline
7618 - If --RunAsDaemon is set, tor forks and backgrounds on startup