1 Changes in version 0.2.1.5-alpha - 2008-08-??
2 o Major features [IPv6 support]:
3 - Convert many internal address representations to optionally hold
5 - Generate and accept IPv6 addresses in many protocol elements.
8 Changes in version 0.2.1.4-alpha - 2008-08-04
10 - The address part of exit policies was not correctly written
11 to router descriptors. This generated router descriptors that failed
12 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
14 - Tor triggered a false assert when extending a circuit to a relay
15 but we already have a connection open to that relay. Noticed by
16 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
19 - Fix a hidden service logging bug: in some edge cases, the router
20 descriptor of a previously picked introduction point becomes
21 obsolete and we need to give up on it rather than continually
22 complaining that it has become obsolete. Observed by xiando. Bugfix
26 - Take out the TestVia config option, since it was a workaround for
27 a bug that was fixed in Tor 0.1.1.21.
30 Changes in version 0.2.1.3-alpha - 2008-08-03
31 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
32 - Send a bootstrap problem "warn" event on the first problem if the
33 reason is NO_ROUTE (that is, our network is down).
36 - Implement most of proposal 110: The first K cells to be sent
37 along a circuit are marked as special "early" cells; only K "early"
38 cells will be allowed. Once this code is universal, we can block
39 certain kinds of DOS attack by requiring that EXTEND commands must
40 be sent using an "early" cell.
43 - Try to attach connections immediately upon receiving a RENDEZVOUS2
44 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
45 on the client side when connecting to a hidden service. Bugfix
46 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
47 - Ensure that two circuits can never exist on the same connection
48 with the same circuit ID, even if one is marked for close. This
49 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
52 - When relays do their initial bandwidth measurement, don't limit
53 to just our entry guards for the test circuits. Otherwise we tend
54 to have multiple test circuits going through a single entry guard,
55 which makes our bandwidth test less accurate. Fixes part of bug 654;
56 patch contributed by Josh Albrecht.
57 - Add an ExcludeExitNodes option so users can list a set of nodes
58 that should be be excluded from the exit node position, but
59 allowed elsewhere. Implements proposal 151.
60 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
61 ExcludeNodes and ExcludeExitNodes lists.
62 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
63 be more efficient. Formerly it was quadratic in the number of
64 servers; now it should be linear. Fixes bug 509.
65 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
66 and n_conn_id_digest fields into a separate structure that's
67 only needed when the circuit has not yet attached to an n_conn.
70 - Change the contrib/tor.logrotate script so it makes the new
71 logs as "_tor:_tor" rather than the default, which is generally
72 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
73 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
74 warnings (occasionally), but it can also cause the compiler to
75 eliminate error-checking code. Suggested by Peter Gutmann.
76 - When a hidden service is giving up on an introduction point candidate
77 that was not included in the last published rendezvous descriptor,
78 don't reschedule publication of the next descriptor. Fixes bug 763.
80 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
81 HiddenServiceExcludeNodes as obsolete: they never worked properly,
82 and nobody claims to be using them. Fixes bug 754. Bugfix on
83 0.1.0.1-rc. Patch from Christian Wilms.
84 - Fix a small alignment and memory-wasting bug on buffer chunks. Spotted
87 o Minor bugfixes (controller):
88 - When closing an application-side connection because its circuit
89 is getting torn down, generate the stream event correctly.
90 Bugfix on 0.1.2.x. Anonymous patch.
93 - Remove all backward-compatibility code to support relays running
94 versions of Tor so old that they no longer work at all on the
98 Changes in version 0.2.0.29-rc - 2008-07-08
100 - If you have more than one bridge but don't know their keys,
101 you would only launch a request for the descriptor of the first one
102 on your list. (Tor considered launching requests for the others, but
103 found that it already had a connection on the way for $0000...0000
104 so it didn't open another.) Bugfix on 0.2.0.x.
105 - If you have more than one bridge but don't know their keys, and the
106 connection to one of the bridges failed, you would cancel all
107 pending bridge connections. (After all, they all have the same
108 digest.) Bugfix on 0.2.0.x.
109 - When a hidden service was trying to establish an introduction point,
110 and Tor had built circuits preemptively for such purposes, we
111 were ignoring all the preemptive circuits and launching a new one
112 instead. Bugfix on 0.2.0.14-alpha.
113 - When a hidden service was trying to establish an introduction point,
114 and Tor *did* manage to reuse one of the preemptively built
115 circuits, it didn't correctly remember which one it used,
116 so it asked for another one soon after, until there were no
117 more preemptive circuits, at which point it launched one from
118 scratch. Bugfix on 0.0.9.x.
119 - Make directory servers include the X-Your-Address-Is: http header in
120 their responses even for begin_dir conns. Now clients who only
121 ever use begin_dir connections still have a way to learn their IP
122 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
125 - Fix a macro/CPP interaction that was confusing some compilers:
126 some GCCs don't like #if/#endif pairs inside macro arguments.
128 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
129 Fixes bug 704; fix from Steven Murdoch.
130 - When opening /dev/null in finish_daemonize(), do not pass the
131 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
132 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
133 - Correctly detect transparent proxy support on Linux hosts that
134 require in.h to be included before netfilter_ipv4.h. Patch
136 - Disallow session resumption attempts during the renegotiation
137 stage of the v2 handshake protocol. Clients should never be
138 trying session resumption at this point, but apparently some
139 did, in ways that caused the handshake to fail. Bugfix on
140 0.2.0.20-rc. Bug found by Geoff Goodell.
143 Changes in version 0.2.1.2-alpha - 2008-06-20
144 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
145 make it easier to set up your own private Tor network; fixes several
146 big bugs with using more than one bridge relay; fixes a big bug with
147 offering hidden services quickly after Tor starts; and uses a better
148 API for reporting potential bootstrapping problems to the controller.
151 - New TestingTorNetwork config option to allow adjustment of
152 previously constant values that, while reasonable, could slow
153 bootstrapping. Implements proposal 135. Patch from Karsten.
156 - If you have more than one bridge but don't know their digests,
157 you would only learn a request for the descriptor of the first one
158 on your list. (Tor considered launching requests for the others, but
159 found that it already had a connection on the way for $0000...0000
160 so it didn't open another.) Bugfix on 0.2.0.x.
161 - If you have more than one bridge but don't know their digests,
162 and the connection to one of the bridges failed, you would cancel
163 all pending bridge connections. (After all, they all have the
164 same digest.) Bugfix on 0.2.0.x.
165 - When establishing a hidden service, introduction points that
166 originate from cannibalized circuits are completely ignored and not
167 included in rendezvous service descriptors. This might be another
168 reason for delay in making a hidden service available. Bugfix
169 from long ago (0.0.9.x?)
172 - Allow OpenSSL to use dynamic locks if it wants.
173 - When building a consensus, do not include routers that are down.
174 This will cut down 30% to 40% on consensus size. Implements
176 - In directory authorities' approved-routers files, allow
177 fingerprints with or without space.
178 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
179 controller can query our current bootstrap state in case it attaches
180 partway through and wants to catch up.
181 - Send an initial "Starting" bootstrap status event, so we have a
182 state to start out in.
185 - Asking for a conditional consensus at .../consensus/<fingerprints>
186 would crash a dirserver if it did not already have a
187 consensus. Bugfix on 0.2.1.1-alpha.
188 - Clean up some macro/CPP interactions: some GCC versions don't like
189 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
192 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
193 - Directory authorities shouldn't complain about bootstrapping
194 problems just because they do a lot of reachability testing and
195 some of the connection attempts fail.
196 - Start sending "count" and "recommendation" key/value pairs in
197 bootstrap problem status events, so the controller can hear about
198 problems even before Tor decides they're worth reporting for sure.
199 - If you're using bridges, generate "bootstrap problem" warnings
200 as soon as you run out of working bridges, rather than waiting
201 for ten failures -- which will never happen if you have less than
203 - If we close our OR connection because there's been a circuit
204 pending on it for too long, we were telling our bootstrap status
205 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
208 Changes in version 0.2.1.1-alpha - 2008-06-13
209 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
210 were making the Tor process bloat especially on Linux; makes our TLS
211 handshake blend in better; sends "bootstrap phase" status events to
212 the controller, so it can keep the user informed of progress (and
213 problems) fetching directory information and establishing circuits;
214 and adds a variety of smaller features.
217 - More work on making our TLS handshake blend in: modify the list
218 of ciphers advertised by OpenSSL in client mode to even more
219 closely resemble a common web browser. We cheat a little so that
220 we can advertise ciphers that the locally installed OpenSSL doesn't
222 - Start sending "bootstrap phase" status events to the controller,
223 so it can keep the user informed of progress fetching directory
224 information and establishing circuits. Also inform the controller
225 if we think we're stuck at a particular bootstrap phase. Implements
227 - Resume using OpenSSL's RAND_poll() for better (and more portable)
228 cross-platform entropy collection again. We used to use it, then
229 stopped using it because of a bug that could crash systems that
230 called RAND_poll when they had a lot of fds open. It looks like the
231 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
232 at startup, and to call RAND_poll() when we reseed later only if
233 we have a non-buggy OpenSSL version.
236 - When we choose to abandon a new entry guard because we think our
237 older ones might be better, close any circuits pending on that
238 new entry guard connection. This fix should make us recover much
239 faster when our network is down and then comes back. Bugfix on
240 0.1.2.8-beta; found by lodger.
242 o Memory fixes and improvements:
243 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
244 to avoid unused RAM in buffer chunks and memory pools.
245 - Speed up parsing and cut down on memory fragmentation by using
246 stack-style allocations for parsing directory objects. Previously,
247 this accounted for over 40% of allocations from within Tor's code
248 on a typical directory cache.
249 - Use a Bloom filter rather than a digest-based set to track which
250 descriptors we need to keep around when we're cleaning out old
251 router descriptors. This speeds up the computation significantly,
252 and may reduce fragmentation.
253 - Reduce the default smartlist size from 32 to 16; it turns out that
254 most smartlists hold around 8-12 elements tops.
255 - Make dumpstats() log the fullness and size of openssl-internal
257 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
258 patch to their OpenSSL, turn it on to save memory on servers. This
259 patch will (with any luck) get included in a mainline distribution
261 - Never use OpenSSL compression: it wastes RAM and CPU trying to
262 compress cells, which are basically all encrypted, compressed,
266 - Stop reloading the router list from disk for no reason when we
267 run out of reachable directory mirrors. Once upon a time reloading
268 it would set the 'is_running' flag back to 1 for them. It hasn't
269 done that for a long time.
270 - In very rare situations new hidden service descriptors were
271 published earlier than 30 seconds after the last change to the
272 service. (We currently think that a hidden service descriptor
273 that's been stable for 30 seconds is worth publishing.)
276 - Allow separate log levels to be configured for different logging
277 domains. For example, this allows one to log all notices, warnings,
278 or errors, plus all memory management messages of level debug or
279 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
280 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
281 and stop using a warning that had become unfixably verbose under
283 - New --hush command-line option similar to --quiet. While --quiet
284 disables all logging to the console on startup, --hush limits the
285 output to messages of warning and error severity.
286 - Servers support a new URL scheme for consensus downloads that
287 allows the client to specify which authorities are trusted.
288 The server then only sends the consensus if the client will trust
289 it. Otherwise a 404 error is sent back. Clients use this
290 new scheme when the server supports it (meaning it's running
291 0.2.1.1-alpha or later). Implements proposal 134.
292 - New configure/torrc options (--enable-geoip-stats,
293 DirRecordUsageByCountry) to record how many IPs we've served
294 directory info to in each country code, how many status documents
295 total we've sent to each country code, and what share of the total
296 directory requests we should expect to see.
297 - Use the TLS1 hostname extension to more closely resemble browser
299 - Lots of new unit tests.
300 - Add a macro to implement the common pattern of iterating through
301 two parallel lists in lockstep.
304 Changes in version 0.2.0.28-rc - 2008-06-13
305 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
306 performance bug, and fixes a bunch of smaller bugs.
309 - Fix a bug where, when we were choosing the 'end stream reason' to
310 put in our relay end cell that we send to the exit relay, Tor
311 clients on Windows were sometimes sending the wrong 'reason'. The
312 anonymity problem is that exit relays may be able to guess whether
313 the client is running Windows, thus helping partition the anonymity
314 set. Down the road we should stop sending reasons to exit relays,
315 or otherwise prevent future versions of this bug.
318 - While setting up a hidden service, some valid introduction circuits
319 were overlooked and abandoned. This might be the reason for
320 the long delay in making a hidden service available. Bugfix on
324 - Update to the "June 9 2008" ip-to-country file.
325 - Run 'make test' as part of 'make dist', so we stop releasing so
326 many development snapshots that fail their unit tests.
329 - When we're checking if we have enough dir info for each relay
330 to begin establishing circuits, make sure that we actually have
331 the descriptor listed in the consensus, not just any descriptor.
333 - Bridge relays no longer print "xx=0" in their extrainfo document
334 for every single country code in the geoip db. Bugfix on
336 - Only warn when we fail to load the geoip file if we were planning to
337 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
338 - If we change our MaxAdvertisedBandwidth and then reload torrc,
339 Tor won't realize it should publish a new relay descriptor. Fixes
340 bug 688, reported by mfr. Bugfix on 0.1.2.x.
341 - When we haven't had any application requests lately, don't bother
342 logging that we have expired a bunch of descriptors. Bugfix
344 - Make relay cells written on a connection count as non-padding when
345 tracking how long a connection has been in use. Bugfix on
346 0.2.0.1-alpha. Spotted by lodger.
347 - Fix unit tests in 0.2.0.27-rc.
348 - Fix compile on Windows.
351 Changes in version 0.2.0.27-rc - 2008-06-03
352 Tor 0.2.0.27-rc adds a few features we left out of the earlier
353 release candidates. In particular, we now include an IP-to-country
354 GeoIP database, so controllers can easily look up what country a
355 given relay is in, and so bridge relays can give us some sanitized
356 summaries about which countries are making use of bridges. (See proposal
357 126-geoip-fetching.txt for details.)
360 - Include an IP-to-country GeoIP file in the tarball, so bridge
361 relays can report sanitized summaries of the usage they're seeing.
364 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
365 Robert Hogan. Fixes the first part of bug 681.
366 - Make bridge authorities never serve extrainfo docs.
367 - Add support to detect Libevent versions in the 1.4.x series
369 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
370 - Include a new contrib/tor-exit-notice.html file that exit relay
371 operators can put on their website to help reduce abuse queries.
374 - When tunneling an encrypted directory connection, and its first
375 circuit fails, do not leave it unattached and ask the controller
376 to deal. Fixes the second part of bug 681.
377 - Make bridge authorities correctly expire old extrainfo documents
381 Changes in version 0.2.0.26-rc - 2008-05-13
382 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
383 in Debian's OpenSSL packages. All users running any 0.2.0.x version
384 should upgrade, whether they're running Debian or not.
386 o Major security fixes:
387 - Use new V3 directory authority keys on the tor26, gabelmoo, and
388 moria1 V3 directory authorities. The old keys were generated with
389 a vulnerable version of Debian's OpenSSL package, and must be
390 considered compromised. Other authorities' keys were not generated
391 with an affected version of OpenSSL.
394 - List authority signatures as "unrecognized" based on DirServer
395 lines, not on cert cache. Bugfix on 0.2.0.x.
398 - Add a new V3AuthUseLegacyKey option to make it easier for
399 authorities to change their identity keys if they have to.
402 Changes in version 0.2.0.25-rc - 2008-04-23
403 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
406 - Remember to initialize threading before initializing logging.
407 Otherwise, many BSD-family implementations will crash hard on
408 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
411 - Authorities correctly free policies on bad servers on
412 exit. Fixes bug 672. Bugfix on 0.2.0.x.
415 Changes in version 0.2.0.24-rc - 2008-04-22
416 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
417 v3 directory authority, makes relays with dynamic IP addresses and no
418 DirPort notice more quickly when their IP address changes, fixes a few
419 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
421 o New directory authorities:
422 - Take lefkada out of the list of v3 directory authorities, since
423 it has been down for months.
424 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
428 - Detect address changes more quickly on non-directory mirror
429 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
431 o Minor features (security):
432 - Reject requests for reverse-dns lookup of names that are in
433 a private address space. Patch from lodger.
434 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
437 o Minor bugfixes (crashes):
438 - Avoid a rare assert that can trigger when Tor doesn't have much
439 directory information yet and it tries to fetch a v2 hidden
440 service descriptor. Fixes bug 651, reported by nwf.
441 - Initialize log mutex before initializing dmalloc. Otherwise,
442 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
443 - Use recursive pthread mutexes in order to avoid deadlock when
444 logging debug-level messages to a controller. Bug spotted by nwf,
445 bugfix on 0.2.0.16-alpha.
447 o Minor bugfixes (resource management):
448 - Keep address policies from leaking memory: start their refcount
449 at 1, not 2. Bugfix on 0.2.0.16-alpha.
450 - Free authority certificates on exit, so they don't look like memory
451 leaks. Bugfix on 0.2.0.19-alpha.
452 - Free static hashtables for policy maps and for TLS connections on
453 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
454 - Avoid allocating extra space when computing consensuses on 64-bit
455 platforms. Bug spotted by aakova.
457 o Minor bugfixes (misc):
458 - Do not read the configuration file when we've only been told to
459 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
460 based on patch from Sebastian Hahn.
461 - Exit relays that are used as a client can now reach themselves
462 using the .exit notation, rather than just launching an infinite
463 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
464 - When attempting to open a logfile fails, tell us why.
465 - Fix a dumb bug that was preventing us from knowing that we should
466 preemptively build circuits to handle expected directory requests.
467 Fixes bug 660. Bugfix on 0.1.2.x.
468 - Warn less verbosely about clock skew from netinfo cells from
469 untrusted sources. Fixes bug 663.
470 - Make controller stream events for DNS requests more consistent,
471 by adding "new stream" events for DNS requests, and removing
472 spurious "stream closed" events" for cached reverse resolves.
473 Patch from mwenge. Fixes bug 646.
474 - Correctly notify one-hop connections when a circuit build has
475 failed. Possible fix for bug 669. Found by lodger.
478 Changes in version 0.2.0.23-rc - 2008-03-24
479 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
480 makes bootstrapping faster if the first directory mirror you contact
481 is down. The bundles also include the new Vidalia 0.1.2 release.
484 - When a tunneled directory request is made to a directory server
485 that's down, notice after 30 seconds rather than 120 seconds. Also,
486 fail any begindir streams that are pending on it, so they can
487 retry elsewhere. This was causing multi-minute delays on bootstrap.
490 Changes in version 0.2.0.22-rc - 2008-03-18
491 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
492 enables encrypted directory connections by default for non-relays, fixes
493 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
494 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
497 - Enable encrypted directory connections by default for non-relays,
498 so censor tools that block Tor directory connections based on their
499 plaintext patterns will no longer work. This means Tor works in
500 certain censored countries by default again.
503 - Make sure servers always request certificates from clients during
504 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
505 - Do not enter a CPU-eating loop when a connection is closed in
506 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
507 diagnosed by lodger; bugfix on 0.2.0.20-rc.
508 - Fix assertion failure that could occur when a blocked circuit
509 became unblocked, and it had pending client DNS requests. Bugfix
510 on 0.2.0.1-alpha. Fixes bug 632.
512 o Minor bugfixes (on 0.1.2.x):
513 - Generate "STATUS_SERVER" events rather than misspelled
514 "STATUS_SEVER" events. Caught by mwenge.
515 - When counting the number of bytes written on a TLS connection,
516 look at the BIO actually used for writing to the network, not
517 at the BIO used (sometimes) to buffer data for the network.
518 Looking at different BIOs could result in write counts on the
519 order of ULONG_MAX. Fixes bug 614.
520 - On Windows, correctly detect errors when listing the contents of
521 a directory. Fix from lodger.
523 o Minor bugfixes (on 0.2.0.x):
524 - Downgrade "sslv3 alert handshake failure" message to INFO.
525 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
526 left BandwidthRate and BandwidthBurst at the default, we would be
527 silently limited by those defaults. Now raise them to match the
528 RelayBandwidth* values.
529 - Fix the SVK version detection logic to work correctly on a branch.
530 - Make --enable-openbsd-malloc work correctly on Linux with alpha
532 - Logging functions now check that the passed severity is sane.
533 - Use proper log levels in the testsuite call of
534 get_interface_address6().
535 - When using a nonstandard malloc, do not use the platform values for
536 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
537 - Make the openbsd malloc code use 8k pages on alpha CPUs and
539 - Detect mismatched page sizes when using --enable-openbsd-malloc.
540 - Avoid double-marked-for-close warning when certain kinds of invalid
541 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
542 for bug 617. Bugfix on 0.2.0.1-alpha.
543 - Make sure that the "NULL-means-reject *:*" convention is followed by
544 all the policy manipulation functions, avoiding some possible crash
545 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
546 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
547 actually works, and doesn't warn about every single reverse lookup.
548 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
551 - Only log guard node status when guard node status has changed.
552 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
553 make "INFO" 75% less verbose.
556 Changes in version 0.2.0.21-rc - 2008-03-02
557 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
558 makes Tor work well with Vidalia again, fixes a rare assert bug,
559 and fixes a pair of more minor bugs. The bundles also include Vidalia
560 0.1.0 and Torbutton 1.1.16.
563 - The control port should declare that it requires password auth
564 when HashedControlSessionPassword is set too. Patch from Matt Edman;
565 bugfix on 0.2.0.20-rc. Fixes bug 615.
566 - Downgrade assert in connection_buckets_decrement() to a log message.
567 This may help us solve bug 614, and in any case will make its
568 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
569 - We were sometimes miscounting the number of bytes read from the
570 network, causing our rate limiting to not be followed exactly.
571 Bugfix on 0.2.0.16-alpha. Reported by lodger.
574 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
575 OpenSSL versions should have been working fine. Diagnosis and patch
576 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
577 Bugfix on 0.2.0.20-rc.
580 Changes in version 0.2.0.20-rc - 2008-02-24
581 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
582 makes more progress towards normalizing Tor's TLS handshake, makes
583 hidden services work better again, helps relays bootstrap if they don't
584 know their IP address, adds optional support for linking in openbsd's
585 allocator or tcmalloc, allows really fast relays to scale past 15000
586 sockets, and fixes a bunch of minor bugs reported by Veracode.
589 - Enable the revised TLS handshake based on the one designed by
590 Steven Murdoch in proposal 124, as revised in proposal 130. It
591 includes version negotiation for OR connections as described in
592 proposal 105. The new handshake is meant to be harder for censors
593 to fingerprint, and it adds the ability to detect certain kinds of
594 man-in-the-middle traffic analysis attacks. The version negotiation
595 feature will allow us to improve Tor's link protocol more safely
597 - Choose which bridge to use proportional to its advertised bandwidth,
598 rather than uniformly at random. This should speed up Tor for
599 bridge users. Also do this for people who set StrictEntryNodes.
600 - When a TrackHostExits-chosen exit fails too many times in a row,
601 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
604 - Resolved problems with (re-)fetching hidden service descriptors.
605 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
607 - If we only ever used Tor for hidden service lookups or posts, we
608 would stop building circuits and start refusing connections after
609 24 hours, since we falsely believed that Tor was dormant. Reported
610 by nwf; bugfix on 0.1.2.x.
611 - Servers that don't know their own IP address should go to the
612 authorities for their first directory fetch, even if their DirPort
613 is off or if they don't know they're reachable yet. This will help
614 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
615 - When counting the number of open sockets, count not only the number
616 of sockets we have received from the socket() call, but also
617 the number we've gotten from accept() and socketpair(). This bug
618 made us fail to count all sockets that we were using for incoming
619 connections. Bugfix on 0.2.0.x.
620 - Fix code used to find strings within buffers, when those strings
621 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
622 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
623 - Add a new __HashedControlSessionPassword option for controllers
624 to use for one-off session password hashes that shouldn't get
625 saved to disk by SAVECONF --- Vidalia users were accumulating a
626 pile of HashedControlPassword lines in their torrc files, one for
627 each time they had restarted Tor and then clicked Save. Make Tor
628 automatically convert "HashedControlPassword" to this new option but
629 only when it's given on the command line. Partial fix for bug 586.
631 o Minor features (performance):
632 - Tune parameters for cell pool allocation to minimize amount of
634 - Add OpenBSD malloc code from phk as an optional malloc
635 replacement on Linux: some glibc libraries do very poorly
636 with Tor's memory allocation patterns. Pass
637 --enable-openbsd-malloc to get the replacement malloc code.
638 - Add a --with-tcmalloc option to the configure script to link
639 against tcmalloc (if present). Does not yet search for
640 non-system include paths.
641 - Stop imposing an arbitrary maximum on the number of file descriptors
642 used for busy servers. Bug reported by Olaf Selke; patch from
645 o Minor features (other):
646 - When SafeLogging is disabled, log addresses along with all TLS
648 - When building with --enable-gcc-warnings, check for whether Apple's
649 warning "-Wshorten-64-to-32" is available.
650 - Add a --passphrase-fd argument to the tor-gencert command for
653 o Minor bugfixes (memory leaks and code problems):
654 - We were leaking a file descriptor if Tor started with a zero-length
655 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
656 - Detect size overflow in zlib code. Reported by Justin Ferguson and
658 - We were comparing the raw BridgePassword entry with a base64'ed
659 version of it, when handling a "/tor/networkstatus-bridges"
660 directory request. Now compare correctly. Noticed by Veracode.
661 - Recover from bad tracked-since value in MTBF-history file.
663 - Alter the code that tries to recover from unhandled write
664 errors, to not try to flush onto a socket that's given us
665 unhandled errors. Bugfix on 0.1.2.x.
666 - Make Unix controlsockets work correctly on OpenBSD. Patch from
667 tup. Bugfix on 0.2.0.3-alpha.
669 o Minor bugfixes (other):
670 - If we have an extra-info document for our server, always make
671 it available on the control port, even if we haven't gotten
672 a copy of it from an authority yet. Patch from mwenge.
673 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
674 - Directory mirrors no longer include a guess at the client's IP
675 address if the connection appears to be coming from the same /24
676 network; it was producing too many wrong guesses.
677 - Make the new hidden service code respect the SafeLogging setting.
678 Bugfix on 0.2.0.x. Patch from Karsten.
679 - When starting as an authority, do not overwrite all certificates
680 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
681 - If we're trying to flush the last bytes on a connection (for
682 example, when answering a directory request), reset the
683 time-to-give-up timeout every time we manage to write something
684 on the socket. Bugfix on 0.1.2.x.
685 - Change the behavior of "getinfo status/good-server-descriptor"
686 so it doesn't return failure when any authority disappears.
687 - Even though the man page said that "TrackHostExits ." should
688 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
689 - Report TLS "zero return" case as a "clean close" and "IO error"
690 as a "close". Stop calling closes "unexpected closes": existing
691 Tors don't use SSL_close(), so having a connection close without
692 the TLS shutdown handshake is hardly unexpected.
693 - Send NAMESERVER_STATUS messages for a single failed nameserver
696 o Code simplifications and refactoring:
697 - Remove the tor_strpartition function: its logic was confused,
698 and it was only used for one thing that could be implemented far
702 Changes in version 0.2.0.19-alpha - 2008-02-09
703 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
704 handshake, makes path selection for relays more secure and IP address
705 guessing more robust, and generally fixes a lot of bugs in preparation
706 for calling the 0.2.0 branch stable.
709 - Do not include recognizeable strings in the commonname part of
710 Tor's x509 certificates.
713 - If we're a relay, avoid picking ourselves as an introduction point,
714 a rendezvous point, or as the final hop for internal circuits. Bug
715 reported by taranis and lodger. Bugfix on 0.1.2.x.
716 - Patch from "Andrew S. Lists" to catch when we contact a directory
717 mirror at IP address X and he says we look like we're coming from
718 IP address X. Bugfix on 0.1.2.x.
720 o Minor features (security):
721 - Be more paranoid about overwriting sensitive memory on free(),
722 as a defensive programming tactic to ensure forward secrecy.
724 o Minor features (directory authority):
725 - Actually validate the options passed to AuthDirReject,
726 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
727 - Reject router descriptors with out-of-range bandwidthcapacity or
728 bandwidthburst values.
730 o Minor features (controller):
731 - Reject controller commands over 1MB in length. This keeps rogue
732 processes from running us out of memory.
734 o Minor features (misc):
735 - Give more descriptive well-formedness errors for out-of-range
736 hidden service descriptor/protocol versions.
737 - Make memory debugging information describe more about history
738 of cell allocation, so we can help reduce our memory use.
740 o Deprecated features (controller):
741 - The status/version/num-versioning and status/version/num-concurring
742 GETINFO options are no longer useful in the v3 directory protocol:
743 treat them as deprecated, and warn when they're used.
746 - When our consensus networkstatus has been expired for a while, stop
747 being willing to build circuits using it. Fixes bug 401. Bugfix
749 - Directory caches now fetch certificates from all authorities
750 listed in a networkstatus consensus, even when they do not
751 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
752 - When connecting to a bridge without specifying its key, insert
753 the connection into the identity-to-connection map as soon as
754 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
755 - Detect versions of OS X where malloc_good_size() is present in the
756 library but never actually declared. Resolves bug 587. Bugfix
758 - Stop incorrectly truncating zlib responses to directory authority
759 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
760 - Stop recommending that every server operator send mail to tor-ops.
761 Resolves bug 597. Bugfix on 0.1.2.x.
762 - Don't trigger an assert if we start a directory authority with a
763 private IP address (like 127.0.0.1).
764 - Avoid possible failures when generating a directory with routers
765 with over-long versions strings, or too many flags set. Bugfix
767 - If an attempt to launch a DNS resolve request over the control
768 port fails because we have overrun the limit on the number of
769 connections, tell the controller that the request has failed.
770 - Avoid using too little bandwidth when our clock skips a few
771 seconds. Bugfix on 0.1.2.x.
772 - Fix shell error when warning about missing packages in configure
773 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
774 - Do not become confused when receiving a spurious VERSIONS-like
775 cell from a confused v1 client. Bugfix on 0.2.0.x.
776 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
777 introduction points for a hidden service have failed. Patch from
778 Karsten Loesing. Bugfix on 0.2.0.x.
780 o Code simplifications and refactoring:
781 - Remove some needless generality from cpuworker code, for improved
783 - Stop overloading the circuit_t.onionskin field for both "onionskin
784 from a CREATE cell that we are waiting for a cpuworker to be
785 assigned" and "onionskin from an EXTEND cell that we are going to
786 send to an OR as soon as we are connected". Might help with bug 600.
787 - Add an in-place version of aes_crypt() so that we can avoid doing a
788 needless memcpy() call on each cell payload.
791 Changes in version 0.2.0.18-alpha - 2008-01-25
792 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
793 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
794 that can warn or reject connections to ports generally associated with
795 vulnerable-plaintext protocols.
797 o New directory authorities:
798 - Set up dannenberg (run by CCC) as the sixth v3 directory
802 - Fix a major memory leak when attempting to use the v2 TLS
803 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
804 - We accidentally enabled the under-development v2 TLS handshake
805 code, which was causing log entries like "TLS error while
806 renegotiating handshake". Disable it again. Resolves bug 590.
807 - We were computing the wrong Content-Length: header for directory
808 responses that need to be compressed on the fly, causing clients
809 asking for those items to always fail. Bugfix on 0.2.0.x; partially
813 - Avoid going directly to the directory authorities even if you're a
814 relay, if you haven't found yourself reachable yet or if you've
815 decided not to advertise your dirport yet. Addresses bug 556.
816 - If we've gone 12 hours since our last bandwidth check, and we
817 estimate we have less than 50KB bandwidth capacity but we could
818 handle more, do another bandwidth test.
819 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
820 Tor can warn and/or refuse connections to ports commonly used with
821 vulnerable-plaintext protocols. Currently we warn on ports 23,
822 109, 110, and 143, but we don't reject any.
825 - When we setconf ClientOnly to 1, close any current OR and Dir
826 listeners. Reported by mwenge.
827 - When we get a consensus that's been signed by more people than
828 we expect, don't log about it; it's not a big deal. Reported
832 - Don't answer "/tor/networkstatus-bridges" directory requests if
833 the request isn't encrypted.
834 - Make "ClientOnly 1" config option disable directory ports too.
835 - Patches from Karsten Loesing to make v2 hidden services more
836 robust: work even when there aren't enough HSDir relays available;
837 retry when a v2 rend desc fetch fails; but don't retry if we
838 already have a usable v0 rend desc.
841 Changes in version 0.2.0.17-alpha - 2008-01-17
842 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
845 - Make the tor-gencert man page get included correctly in the tarball.
848 Changes in version 0.2.0.16-alpha - 2008-01-17
849 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
850 Loesing, and generally cleans up a lot of features and minor bugs.
852 o New directory authorities:
853 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
856 o Major performance improvements:
857 - Switch our old ring buffer implementation for one more like that
858 used by free Unix kernels. The wasted space in a buffer with 1mb
859 of data will now be more like 8k than 1mb. The new implementation
860 also avoids realloc();realloc(); patterns that can contribute to
861 memory fragmentation.
864 - Configuration files now accept C-style strings as values. This
865 helps encode characters not allowed in the current configuration
866 file format, such as newline or #. Addresses bug 557.
867 - Although we fixed bug 539 (where servers would send HTTP status 503
868 responses _and_ send a body too), there are still servers out
869 there that haven't upgraded. Therefore, make clients parse such
870 bodies when they receive them.
871 - When we're not serving v2 directory information, there is no reason
872 to actually keep any around. Remove the obsolete files and directory
873 on startup if they are very old and we aren't going to serve them.
875 o Minor performance improvements:
876 - Reference-count and share copies of address policy entries; only 5%
877 of them were actually distinct.
878 - Never walk through the list of logs if we know that no log is
879 interested in a given message.
882 - When an authority has not signed a consensus, do not try to
883 download a nonexistent "certificate with key 00000000". Bugfix
884 on 0.2.0.x. Fixes bug 569.
885 - Fix a rare assert error when we're closing one of our threads:
886 use a mutex to protect the list of logs, so we never write to the
887 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
888 bug 575, which is kind of the revenge of bug 222.
889 - Patch from Karsten Loesing to complain less at both the client
890 and the relay when a relay used to have the HSDir flag but doesn't
891 anymore, and we try to upload a hidden service descriptor.
892 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
894 - Do not try to download missing certificates until we have tried
895 to check our fallback consensus. Fixes bug 583.
896 - Make bridges round reported GeoIP stats info up to the nearest
897 estimate, not down. Now we can distinguish between "0 people from
898 this country" and "1 person from this country".
899 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
900 - Avoid possible segfault if key generation fails in
901 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
902 - Avoid segfault in the case where a badly behaved v2 versioning
903 directory sends a signed networkstatus with missing client-versions.
905 - Avoid segfaults on certain complex invocations of
906 router_get_by_hexdigest(). Bugfix on 0.1.2.
907 - Correct bad index on array access in parse_http_time(). Bugfix
909 - Fix possible bug in vote generation when server versions are present
910 but client versions are not.
911 - Fix rare bug on REDIRECTSTREAM control command when called with no
912 port set: it could erroneously report an error when none had
914 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
915 compressing large objects and find ourselves with more than 4k
916 left over. Bugfix on 0.2.0.
917 - Fix a small memory leak when setting up a hidden service.
918 - Fix a few memory leaks that could in theory happen under bizarre
920 - Fix an assert if we post a general-purpose descriptor via the
921 control port but that descriptor isn't mentioned in our current
922 network consensus. Bug reported by Jon McLachlan; bugfix on
925 o Minor features (controller):
926 - Get NS events working again. Patch from tup.
927 - The GETCONF command now escapes and quotes configuration values
928 that don't otherwise fit into the torrc file.
929 - The SETCONF command now handles quoted values correctly.
931 o Minor features (directory authorities):
932 - New configuration options to override default maximum number of
933 servers allowed on a single IP address. This is important for
934 running a test network on a single host.
935 - Actually implement the -s option to tor-gencert.
936 - Add a manual page for tor-gencert.
938 o Minor features (bridges):
939 - Bridge authorities no longer serve bridge descriptors over
940 unencrypted connections.
942 o Minor features (other):
943 - Add hidden services and DNSPorts to the list of things that make
944 Tor accept that it has running ports. Change starting Tor with no
945 ports from a fatal error to a warning; we might change it back if
946 this turns out to confuse anybody. Fixes bug 579.
949 Changes in version 0.1.2.19 - 2008-01-17
950 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
951 exit policy a little bit more conservative so it's safer to run an
952 exit relay on a home system, and fixes a variety of smaller issues.
955 - Exit policies now reject connections that are addressed to a
956 relay's public (external) IP address too, unless
957 ExitPolicyRejectPrivate is turned off. We do this because too
958 many relays are running nearby to services that trust them based
962 - When the clock jumps forward a lot, do not allow the bandwidth
963 buckets to become negative. Fixes bug 544.
964 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
965 on every successful resolve. Reported by Mike Perry.
966 - Purge old entries from the "rephist" database and the hidden
967 service descriptor database even when DirPort is zero.
968 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
969 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
970 crashing or mis-answering these requests.
971 - When we decide to send a 503 response to a request for servers, do
972 not then also send the server descriptors: this defeats the whole
973 purpose. Fixes bug 539.
976 - Changing the ExitPolicyRejectPrivate setting should cause us to
977 rebuild our server descriptor.
978 - Fix handling of hex nicknames when answering controller requests for
979 networkstatus by name, or when deciding whether to warn about
980 unknown routers in a config option. (Patch from mwenge.)
981 - Fix a couple of hard-to-trigger autoconf problems that could result
982 in really weird results on platforms whose sys/types.h files define
983 nonstandard integer types.
984 - Don't try to create the datadir when running --verify-config or
985 --hash-password. Resolves bug 540.
986 - If we were having problems getting a particular descriptor from the
987 directory caches, and then we learned about a new descriptor for
988 that router, we weren't resetting our failure count. Reported
990 - Although we fixed bug 539 (where servers would send HTTP status 503
991 responses _and_ send a body too), there are still servers out there
992 that haven't upgraded. Therefore, make clients parse such bodies
993 when they receive them.
994 - Run correctly on systems where rlim_t is larger than unsigned long.
995 This includes some 64-bit systems.
996 - Run correctly on platforms (like some versions of OS X 10.5) where
997 the real limit for number of open files is OPEN_FILES, not rlim_max
998 from getrlimit(RLIMIT_NOFILES).
999 - Avoid a spurious free on base64 failure.
1000 - Avoid segfaults on certain complex invocations of
1001 router_get_by_hexdigest().
1002 - Fix rare bug on REDIRECTSTREAM control command when called with no
1003 port set: it could erroneously report an error when none had
1007 Changes in version 0.2.0.15-alpha - 2007-12-25
1008 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
1009 features added in 0.2.0.13-alpha.
1012 - Fix several remotely triggerable asserts based on DirPort requests
1013 for a v2 or v3 networkstatus object before we were prepared. This
1014 was particularly bad for 0.2.0.13 and later bridge relays, who
1015 would never have a v2 networkstatus and would thus always crash
1016 when used. Bugfixes on 0.2.0.x.
1017 - Estimate the v3 networkstatus size more accurately, rather than
1018 estimating it at zero bytes and giving it artificially high priority
1019 compared to other directory requests. Bugfix on 0.2.0.x.
1022 - Fix configure.in logic for cross-compilation.
1023 - When we load a bridge descriptor from the cache, and it was
1024 previously unreachable, mark it as retriable so we won't just
1025 ignore it. Also, try fetching a new copy immediately. Bugfixes
1027 - The bridge GeoIP stats were counting other relays, for example
1028 self-reachability and authority-reachability tests.
1031 - Support compilation to target iPhone; patch from cjacker huang.
1032 To build for iPhone, pass the --enable-iphone option to configure.
1035 Changes in version 0.2.0.14-alpha - 2007-12-23
1037 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
1038 without a datadirectory from a previous Tor install. Reported
1040 - Fix a crash when we fetch a descriptor that turns out to be
1041 unexpected (it used to be in our networkstatus when we started
1042 fetching it, but it isn't in our current networkstatus), and we
1043 aren't using bridges. Bugfix on 0.2.0.x.
1044 - Fix a crash when accessing hidden services: it would work the first
1045 time you use a given introduction point for your service, but
1046 on subsequent requests we'd be using garbage memory. Fixed by
1047 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
1048 - Fix a crash when we load a bridge descriptor from disk but we don't
1049 currently have a Bridge line for it in our torrc. Bugfix on
1053 - If bridge authorities set BridgePassword, they will serve a
1054 snapshot of known bridge routerstatuses from their DirPort to
1055 anybody who knows that password. Unset by default.
1058 - Make the unit tests build again.
1059 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
1060 - Make PublishServerDescriptor default to 1, so the default doesn't
1061 have to change as we invent new directory protocol versions.
1062 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
1063 be included unless sys/time.h is already included. Fixes
1064 bug 553. Bugfix on 0.2.0.x.
1065 - If we receive a general-purpose descriptor and then receive an
1066 identical bridge-purpose descriptor soon after, don't discard
1067 the next one as a duplicate.
1070 - If BridgeRelay is set to 1, then the default for
1071 PublishServerDescriptor is now "bridge" rather than "v2,v3".
1072 - If the user sets RelayBandwidthRate but doesn't set
1073 RelayBandwidthBurst, then make them equal rather than erroring out.
1076 Changes in version 0.2.0.13-alpha - 2007-12-21
1077 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
1078 Goodell, fixes many more bugs, and adds a lot of infrastructure for
1081 o New directory authorities:
1082 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
1086 - Only update guard status (usable / not usable) once we have
1087 enough directory information. This was causing us to always pick
1088 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
1089 causing us to discard all our guards on startup if we hadn't been
1090 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
1091 - Purge old entries from the "rephist" database and the hidden
1092 service descriptor databases even when DirPort is zero. Bugfix
1094 - We were ignoring our RelayBandwidthRate for the first 30 seconds
1095 after opening a circuit -- even a relayed circuit. Bugfix on
1097 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
1098 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
1099 crashing or mis-answering these types of requests.
1100 - Relays were publishing their server descriptor to v1 and v2
1101 directory authorities, but they didn't try publishing to v3-only
1102 authorities. Fix this; and also stop publishing to v1 authorities.
1104 - When we were reading router descriptors from cache, we were ignoring
1105 the annotations -- so for example we were reading in bridge-purpose
1106 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
1107 - When we decided to send a 503 response to a request for servers, we
1108 were then also sending the server descriptors: this defeats the
1109 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
1112 - Bridge relays now behave like clients with respect to time
1113 intervals for downloading new consensus documents -- otherwise they
1114 stand out. Bridge users now wait until the end of the interval,
1115 so their bridge relay will be sure to have a new consensus document.
1116 - Three new config options (AlternateDirAuthority,
1117 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
1118 user selectively replace the default directory authorities by type,
1119 rather than the all-or-nothing replacement that DirServer offers.
1120 - Tor can now be configured to read a GeoIP file from disk in one
1121 of two formats. This can be used by controllers to map IP addresses
1122 to countries. Eventually, it may support exit-by-country.
1123 - When possible, bridge relays remember which countries users
1124 are coming from, and report aggregate information in their
1125 extra-info documents, so that the bridge authorities can learn
1126 where Tor is blocked.
1127 - Bridge directory authorities now do reachability testing on the
1128 bridges they know. They provide router status summaries to the
1129 controller via "getinfo ns/purpose/bridge", and also dump summaries
1130 to a file periodically.
1131 - Stop fetching directory info so aggressively if your DirPort is
1132 on but your ORPort is off; stop fetching v2 dir info entirely.
1133 You can override these choices with the new FetchDirInfoEarly
1137 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
1138 consensus documents when there are too many relays at a single
1139 IP address. Now clear it in v2 network status documents too, and
1140 also clear it in routerinfo_t when the relay is no longer listed
1141 in the relevant networkstatus document.
1142 - Don't crash if we get an unexpected value for the
1143 PublishServerDescriptor config option. Reported by Matt Edman;
1144 bugfix on 0.2.0.9-alpha.
1145 - Our new v2 hidden service descriptor format allows descriptors
1146 that have no introduction points. But Tor crashed when we tried
1147 to build a descriptor with no intro points (and it would have
1148 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
1150 - Fix building with dmalloc 5.5.2 with glibc.
1151 - Reject uploaded descriptors and extrainfo documents if they're
1152 huge. Otherwise we'll cache them all over the network and it'll
1153 clog everything up. Reported by Aljosha Judmayer.
1154 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
1155 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
1156 - When the DANGEROUS_VERSION controller status event told us we're
1157 running an obsolete version, it used the string "OLD" to describe
1158 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
1159 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
1160 - If we can't expand our list of entry guards (e.g. because we're
1161 using bridges or we have StrictEntryNodes set), don't mark relays
1162 down when they fail a directory request. Otherwise we're too quick
1163 to mark all our entry points down. Bugfix on 0.1.2.x.
1164 - Fix handling of hex nicknames when answering controller requests for
1165 networkstatus by name, or when deciding whether to warn about unknown
1166 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
1167 - Fix a couple of hard-to-trigger autoconf problems that could result
1168 in really weird results on platforms whose sys/types.h files define
1169 nonstandard integer types. Bugfix on 0.1.2.x.
1170 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
1171 - Don't crash on name lookup when we have no current consensus. Fixes
1172 bug 538; bugfix on 0.2.0.x.
1173 - Only Tors that want to mirror the v2 directory info should
1174 create the "cached-status" directory in their datadir. (All Tors
1175 used to create it.) Bugfix on 0.2.0.9-alpha.
1176 - Directory authorities should only automatically download Extra Info
1177 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
1180 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
1181 consumers. (We already do this on HUP.)
1182 - Authorities and caches fetch the v2 networkstatus documents
1183 less often, now that v3 is encouraged.
1184 - Add a new config option BridgeRelay that specifies you want to
1185 be a bridge relay. Right now the only difference is that it makes
1186 you answer begin_dir requests, and it makes you cache dir info,
1187 even if your DirPort isn't on.
1188 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
1189 ask about source, timestamp of arrival, purpose, etc. We need
1190 something like this to help Vidalia not do GeoIP lookups on bridge
1192 - Allow multiple HashedControlPassword config lines, to support
1193 multiple controller passwords.
1194 - Authorities now decide whether they're authoritative for a given
1195 router based on the router's purpose.
1196 - New config options AuthDirBadDir and AuthDirListBadDirs for
1197 authorities to mark certain relays as "bad directories" in the
1198 networkstatus documents. Also supports the "!baddir" directive in
1199 the approved-routers file.
1202 Changes in version 0.2.0.12-alpha - 2007-11-16
1203 This twelfth development snapshot fixes some more build problems as
1204 well as a few minor bugs.
1207 - Make it build on OpenBSD again. Patch from tup.
1208 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
1209 package-building for Red Hat, OS X, etc.
1211 o Minor bugfixes (on 0.1.2.x):
1212 - Changing the ExitPolicyRejectPrivate setting should cause us to
1213 rebuild our server descriptor.
1215 o Minor bugfixes (on 0.2.0.x):
1216 - When we're lacking a consensus, don't try to perform rendezvous
1217 operations. Reported by Karsten Loesing.
1218 - Fix a small memory leak whenever we decide against using a
1219 newly picked entry guard. Reported by Mike Perry.
1220 - When authorities detected more than two relays running on the same
1221 IP address, they were clearing all the status flags but forgetting
1222 to clear the "hsdir" flag. So clients were being told that a
1223 given relay was the right choice for a v2 hsdir lookup, yet they
1224 never had its descriptor because it was marked as 'not running'
1226 - If we're trying to fetch a bridge descriptor and there's no way
1227 the bridge authority could help us (for example, we don't know
1228 a digest, or there is no bridge authority), don't be so eager to
1229 fall back to asking the bridge authority.
1230 - If we're using bridges or have strictentrynodes set, and our
1231 chosen exit is in the same family as all our bridges/entry guards,
1232 then be flexible about families.
1235 - When we negotiate a v2 link-layer connection (not yet implemented),
1236 accept RELAY_EARLY cells and turn them into RELAY cells if we've
1237 negotiated a v1 connection for their next step. Initial code for
1241 Changes in version 0.2.0.11-alpha - 2007-11-12
1242 This eleventh development snapshot fixes some build problems with
1243 the previous snapshot. It also includes a more secure-by-default exit
1244 policy for relays, fixes an enormous memory leak for exit relays, and
1245 fixes another bug where servers were falling out of the directory list.
1248 - Exit policies now reject connections that are addressed to a
1249 relay's public (external) IP address too, unless
1250 ExitPolicyRejectPrivate is turned off. We do this because too
1251 many relays are running nearby to services that trust them based
1252 on network address. Bugfix on 0.1.2.x.
1255 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
1256 on every successful resolve. Reported by Mike Perry; bugfix
1258 - On authorities, never downgrade to old router descriptors simply
1259 because they're listed in the consensus. This created a catch-22
1260 where we wouldn't list a new descriptor because there was an
1261 old one in the consensus, and we couldn't get the new one in the
1262 consensus because we wouldn't list it. Possible fix for bug 548.
1263 Also, this might cause bug 543 to appear on authorities; if so,
1264 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
1266 o Packaging fixes on 0.2.0.10-alpha:
1267 - We were including instructions about what to do with the
1268 src/config/fallback-consensus file, but we weren't actually
1269 including it in the tarball. Disable all of that for now.
1272 - Allow people to say PreferTunnelledDirConns rather than
1273 PreferTunneledDirConns, for those alternate-spellers out there.
1276 - Don't reevaluate all the information from our consensus document
1277 just because we've downloaded a v2 networkstatus that we intend
1278 to cache. Fixes bug 545; bugfix on 0.2.0.x.
1281 Changes in version 0.2.0.10-alpha - 2007-11-10
1282 This tenth development snapshot adds a third v3 directory authority
1283 run by Mike Perry, adds most of Karsten Loesing's new hidden service
1284 descriptor format, fixes a bad crash bug and new bridge bugs introduced
1285 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
1286 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
1287 addresses many more minor issues.
1289 o New directory authorities:
1290 - Set up ides (run by Mike Perry) as the third v3 directory authority.
1293 - Allow tunnelled directory connections to ask for an encrypted
1294 "begin_dir" connection or an anonymized "uses a full Tor circuit"
1295 connection independently. Now we can make anonymized begin_dir
1296 connections for (e.g.) more secure hidden service posting and
1298 - More progress on proposal 114: code from Karsten Loesing to
1299 implement new hidden service descriptor format.
1300 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
1301 accommodate the growing number of servers that use the default
1302 and are reaching it.
1303 - Directory authorities use a new formula for selecting which nodes
1304 to advertise as Guards: they must be in the top 7/8 in terms of
1305 how long we have known about them, and above the median of those
1306 nodes in terms of weighted fractional uptime.
1307 - Make "not enough dir info yet" warnings describe *why* Tor feels
1308 it doesn't have enough directory info yet.
1311 - Stop servers from crashing if they set a Family option (or
1312 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
1314 - Make bridge users work again -- the move to v3 directories in
1315 0.2.0.9-alpha had introduced a number of bugs that made bridges
1316 no longer work for clients.
1317 - When the clock jumps forward a lot, do not allow the bandwidth
1318 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
1320 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
1321 - When the consensus lists a router descriptor that we previously were
1322 mirroring, but that we considered non-canonical, reload the
1323 descriptor as canonical. This fixes bug 543 where Tor servers
1324 would start complaining after a few days that they don't have
1325 enough directory information to build a circuit.
1326 - Consider replacing the current consensus when certificates arrive
1327 that make the pending consensus valid. Previously, we were only
1328 considering replacement when the new certs _didn't_ help.
1329 - Fix an assert error on startup if we didn't already have the
1330 consensus and certs cached in our datadirectory: we were caching
1331 the consensus in consensus_waiting_for_certs but then free'ing it
1333 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
1334 Request) if we need more v3 certs but we've already got pending
1335 requests for all of them.
1336 - Correctly back off from failing certificate downloads. Fixes
1338 - Authorities don't vote on the Running flag if they have been running
1339 for less than 30 minutes themselves. Fixes bug 547, where a newly
1340 started authority would vote that everyone was down.
1343 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
1344 it, it had no AES, and it hasn't seen any security patches since
1348 - Clients now hold circuitless TLS connections open for 1.5 times
1349 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
1350 rebuild a new circuit over them within that timeframe. Previously,
1351 they held them open only for KeepalivePeriod (5 minutes).
1352 - Use "If-Modified-Since" to avoid retrieving consensus
1353 networkstatuses that we already have.
1354 - When we have no consensus, check FallbackNetworkstatusFile (defaults
1355 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
1356 we start knowing some directory caches.
1357 - When we receive a consensus from the future, warn about skew.
1358 - Improve skew reporting: try to give the user a better log message
1359 about how skewed they are, and how much this matters.
1360 - When we have a certificate for an authority, believe that
1361 certificate's claims about the authority's IP address.
1362 - New --quiet command-line option to suppress the default console log.
1363 Good in combination with --hash-password.
1364 - Authorities send back an X-Descriptor-Not-New header in response to
1365 an accepted-but-discarded descriptor upload. Partially implements
1367 - Make the log message for "tls error. breaking." more useful.
1368 - Better log messages about certificate downloads, to attempt to
1369 track down the second incarnation of bug 546.
1371 o Minor features (bridges):
1372 - If bridge users set UpdateBridgesFromAuthority, but the digest
1373 they ask for is a 404 from the bridge authority, they now fall
1374 back to trying the bridge directly.
1375 - Bridges now use begin_dir to publish their server descriptor to
1376 the bridge authority, even when they haven't set TunnelDirConns.
1378 o Minor features (controller):
1379 - When reporting clock skew, and we know that the clock is _at least
1380 as skewed_ as some value, but we don't know the actual value,
1381 report the value as a "minimum skew."
1384 - Update linux-tor-prio.sh script to allow QoS based on the uid of
1385 the Tor process. Patch from Marco Bonetti with tweaks from Mike
1389 - Refuse to start if both ORPort and UseBridges are set. Bugfix
1390 on 0.2.0.x, suggested by Matt Edman.
1391 - Don't stop fetching descriptors when FetchUselessDescriptors is
1392 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
1393 reported by tup and ioerror.
1394 - Better log message on vote from unknown authority.
1395 - Don't log "Launching 0 request for 0 router" message.
1397 o Minor bugfixes (memory leaks):
1398 - Stop leaking memory every time we parse a v3 certificate. Bugfix
1400 - Stop leaking memory every time we load a v3 certificate. Bugfix
1401 on 0.2.0.1-alpha. Fixes bug 536.
1402 - Stop leaking a cached networkstatus on exit. Bugfix on
1404 - Stop leaking voter information every time we free a consensus.
1405 Bugfix on 0.2.0.3-alpha.
1406 - Stop leaking signed data every time we check a voter signature.
1407 Bugfix on 0.2.0.3-alpha.
1408 - Stop leaking a signature every time we fail to parse a consensus or
1409 a vote. Bugfix on 0.2.0.3-alpha.
1410 - Stop leaking v2_download_status_map on shutdown. Bugfix on
1412 - Stop leaking conn->nickname every time we make a connection to a
1413 Tor relay without knowing its expected identity digest (e.g. when
1414 using bridges). Bugfix on 0.2.0.3-alpha.
1416 - Minor bugfixes (portability):
1417 - Run correctly on platforms where rlim_t is larger than unsigned
1418 long, and/or where the real limit for number of open files is
1419 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
1420 particular, these may be needed for OS X 10.5.
1423 Changes in version 0.1.2.18 - 2007-10-28
1424 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
1425 hidden service introduction that were causing huge delays, and a big
1426 bug that was causing some servers to disappear from the network status
1427 lists for a few hours each day.
1429 o Major bugfixes (crashes):
1430 - If a connection is shut down abruptly because of something that
1431 happened inside connection_flushed_some(), do not call
1432 connection_finished_flushing(). Should fix bug 451:
1433 "connection_stop_writing: Assertion conn->write_event failed"
1434 Bugfix on 0.1.2.7-alpha.
1435 - Fix possible segfaults in functions called from
1436 rend_process_relay_cell().
1438 o Major bugfixes (hidden services):
1439 - Hidden services were choosing introduction points uniquely by
1440 hexdigest, but when constructing the hidden service descriptor
1441 they merely wrote the (potentially ambiguous) nickname.
1442 - Clients now use the v2 intro format for hidden service
1443 connections: they specify their chosen rendezvous point by identity
1444 digest rather than by (potentially ambiguous) nickname. These
1445 changes could speed up hidden service connections dramatically.
1447 o Major bugfixes (other):
1448 - Stop publishing a new server descriptor just because we get a
1449 HUP signal. This led (in a roundabout way) to some servers getting
1450 dropped from the networkstatus lists for a few hours each day.
1451 - When looking for a circuit to cannibalize, consider family as well
1452 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
1453 circuit cannibalization).
1454 - When a router wasn't listed in a new networkstatus, we were leaving
1455 the flags for that router alone -- meaning it remained Named,
1456 Running, etc -- even though absence from the networkstatus means
1457 that it shouldn't be considered to exist at all anymore. Now we
1458 clear all the flags for routers that fall out of the networkstatus
1459 consensus. Fixes bug 529.
1462 - Don't try to access (or alter) the state file when running
1463 --list-fingerprint or --verify-config or --hash-password. Resolves
1465 - When generating information telling us how to extend to a given
1466 router, do not try to include the nickname if it is
1467 absent. Resolves bug 467.
1468 - Fix a user-triggerable segfault in expand_filename(). (There isn't
1469 a way to trigger this remotely.)
1470 - When sending a status event to the controller telling it that an
1471 OR address is reachable, set the port correctly. (Previously we
1472 were reporting the dir port.)
1473 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
1474 command. Bugfix on 0.1.2.17.
1475 - When loading bandwidth history, do not believe any information in
1476 the future. Fixes bug 434.
1477 - When loading entry guard information, do not believe any information
1479 - When we have our clock set far in the future and generate an
1480 onion key, then re-set our clock to be correct, we should not stop
1481 the onion key from getting rotated.
1482 - On some platforms, accept() can return a broken address. Detect
1483 this more quietly, and deal accordingly. Fixes bug 483.
1484 - It's not actually an error to find a non-pending entry in the DNS
1485 cache when canceling a pending resolve. Don't log unless stuff
1486 is fishy. Resolves bug 463.
1487 - Don't reset trusted dir server list when we set a configuration
1488 option. Patch from Robert Hogan.
1489 - Don't try to create the datadir when running --verify-config or
1490 --hash-password. Resolves bug 540.
1493 Changes in version 0.2.0.9-alpha - 2007-10-24
1494 This ninth development snapshot switches clients to the new v3 directory
1495 system; allows servers to be listed in the network status even when they
1496 have the same nickname as a registered server; and fixes many other
1497 bugs including a big one that was causing some servers to disappear
1498 from the network status lists for a few hours each day.
1500 o Major features (directory system):
1501 - Clients now download v3 consensus networkstatus documents instead
1502 of v2 networkstatus documents. Clients and caches now base their
1503 opinions about routers on these consensus documents. Clients only
1504 download router descriptors listed in the consensus.
1505 - Authorities now list servers who have the same nickname as
1506 a different named server, but list them with a new flag,
1507 "Unnamed". Now we can list servers that happen to pick the same
1508 nickname as a server that registered two years ago and then
1509 disappeared. Partially implements proposal 122.
1510 - If the consensus lists a router as "Unnamed", the name is assigned
1511 to a different router: do not identify the router by that name.
1512 Partially implements proposal 122.
1513 - Authorities can now come to a consensus on which method to use to
1514 compute the consensus. This gives us forward compatibility.
1517 - Stop publishing a new server descriptor just because we HUP or
1518 when we find our DirPort to be reachable but won't actually publish
1519 it. New descriptors without any real changes are dropped by the
1520 authorities, and can screw up our "publish every 18 hours" schedule.
1522 - When a router wasn't listed in a new networkstatus, we were leaving
1523 the flags for that router alone -- meaning it remained Named,
1524 Running, etc -- even though absence from the networkstatus means
1525 that it shouldn't be considered to exist at all anymore. Now we
1526 clear all the flags for routers that fall out of the networkstatus
1527 consensus. Fixes bug 529; bugfix on 0.1.2.x.
1528 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
1529 extrainfo documents and then discard them immediately for not
1530 matching the latest router. Bugfix on 0.2.0.1-alpha.
1532 o Minor features (v3 directory protocol):
1533 - Allow tor-gencert to generate a new certificate without replacing
1535 - Allow certificates to include an address.
1536 - When we change our directory-cache settings, reschedule all voting
1537 and download operations.
1538 - Reattempt certificate downloads immediately on failure, as long as
1539 we haven't failed a threshold number of times yet.
1540 - Delay retrying consensus downloads while we're downloading
1541 certificates to verify the one we just got. Also, count getting a
1542 consensus that we already have (or one that isn't valid) as a failure,
1543 and count failing to get the certificates after 20 minutes as a
1545 - Build circuits and download descriptors even if our consensus is a
1546 little expired. (This feature will go away once authorities are
1549 o Minor features (router descriptor cache):
1550 - If we find a cached-routers file that's been sitting around for more
1551 than 28 days unmodified, then most likely it's a leftover from
1552 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
1554 - When we (as a cache) download a descriptor because it was listed
1555 in a consensus, remember when the consensus was supposed to expire,
1556 and don't expire the descriptor until then.
1558 o Minor features (performance):
1559 - Call routerlist_remove_old_routers() much less often. This should
1560 speed startup, especially on directory caches.
1561 - Don't try to launch new descriptor downloads quite so often when we
1562 already have enough directory information to build circuits.
1563 - Base64 decoding was actually showing up on our profile when parsing
1564 the initial descriptor file; switch to an in-process all-at-once
1565 implementation that's about 3.5x times faster than calling out to
1568 o Minor features (compilation):
1569 - Detect non-ASCII platforms (if any still exist) and refuse to
1570 build there: some of our code assumes that 'A' is 65 and so on.
1572 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
1573 - Make the "next period" votes into "current period" votes immediately
1574 after publishing the consensus; avoid a heisenbug that made them
1575 stick around indefinitely.
1576 - When we discard a vote as a duplicate, do not report this as
1578 - Treat missing v3 keys or certificates as an error when running as a
1579 v3 directory authority.
1580 - When we're configured to be a v3 authority, but we're only listed
1581 as a non-v3 authority in our DirServer line for ourself, correct
1583 - If an authority doesn't have a qualified hostname, just put
1584 its address in the vote. This fixes the problem where we referred to
1585 "moria on moria:9031."
1586 - Distinguish between detached signatures for the wrong period, and
1587 detached signatures for a divergent vote.
1588 - Fix a small memory leak when computing a consensus.
1589 - When there's no concensus, we were forming a vote every 30
1590 minutes, but writing the "valid-after" line in our vote based
1591 on our configured V3AuthVotingInterval: so unless the intervals
1592 matched up, we immediately rejected our own vote because it didn't
1593 start at the voting interval that caused us to construct a vote.
1595 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
1596 - Delete unverified-consensus when the real consensus is set.
1597 - Consider retrying a consensus networkstatus fetch immediately
1598 after one fails: don't wait 60 seconds to notice.
1599 - When fetching a consensus as a cache, wait until a newer consensus
1600 should exist before trying to replace the current one.
1601 - Use a more forgiving schedule for retrying failed consensus
1602 downloads than for other types.
1604 o Minor bugfixes (other directory issues):
1605 - Correct the implementation of "download votes by digest." Bugfix on
1607 - Authorities no longer send back "400 you're unreachable please fix
1608 it" errors to Tor servers that aren't online all the time. We're
1609 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
1611 o Minor bugfixes (controller):
1612 - Don't reset trusted dir server list when we set a configuration
1613 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
1614 - Respond to INT and TERM SIGNAL commands before we execute the
1615 signal, in case the signal shuts us down. We had a patch in
1616 0.1.2.1-alpha that tried to do this by queueing the response on
1617 the connection's buffer before shutting down, but that really
1618 isn't the same thing at all. Bug located by Matt Edman.
1620 o Minor bugfixes (misc):
1621 - Correctly check for bad options to the "PublishServerDescriptor"
1622 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
1623 - Stop leaking memory on failing case of base32_decode, and make
1624 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
1625 - Don't try to download extrainfo documents when we're trying to
1626 fetch enough directory info to build a circuit: having enough
1627 info should get priority. Bugfix on 0.2.0.x.
1628 - Don't complain that "your server has not managed to confirm that its
1629 ports are reachable" if we haven't been able to build any circuits
1630 yet. Bug found by spending four hours without a v3 consensus. Bugfix
1632 - Detect the reason for failing to mmap a descriptor file we just
1633 wrote, and give a more useful log message. Fixes bug 533. Bugfix
1636 o Code simplifications and refactoring:
1637 - Remove support for the old bw_accounting file: we've been storing
1638 bandwidth accounting information in the state file since
1639 0.1.2.5-alpha. This may result in bandwidth accounting errors
1640 if you try to upgrade from 0.1.1.x or earlier, or if you try to
1641 downgrade to 0.1.1.x or earlier.
1642 - New convenience code to locate a file within the DataDirectory.
1643 - Move non-authority functionality out of dirvote.c.
1644 - Refactor the arguments for router_pick_{directory_|trusteddir}server
1645 so that they all take the same named flags.
1648 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
1649 Unix users an easy way to script their Tor process (e.g. by
1650 adjusting bandwidth based on the time of the day).
1653 Changes in version 0.2.0.8-alpha - 2007-10-12
1654 This eighth development snapshot fixes a crash bug that's been bothering
1655 us since February 2007, lets bridge authorities store a list of bridge
1656 descriptors they've seen, gets v3 directory voting closer to working,
1657 starts caching v3 directory consensus documents on directory mirrors,
1658 and fixes a variety of smaller issues including some minor memory leaks.
1660 o Major features (router descriptor cache):
1661 - Store routers in a file called cached-descriptors instead of in
1662 cached-routers. Initialize cached-descriptors from cached-routers
1663 if the old format is around. The new format allows us to store
1664 annotations along with descriptors.
1665 - Use annotations to record the time we received each descriptor, its
1666 source, and its purpose.
1667 - Disable the SETROUTERPURPOSE controller command: it is now
1669 - Controllers should now specify cache=no or cache=yes when using
1670 the +POSTDESCRIPTOR command.
1671 - Bridge authorities now write bridge descriptors to disk, meaning
1672 we can export them to other programs and begin distributing them
1675 o Major features (directory authorities):
1676 - When a v3 authority is missing votes or signatures, it now tries
1678 - Directory authorities track weighted fractional uptime as well as
1679 weighted mean-time-between failures. WFU is suitable for deciding
1680 whether a node is "usually up", while MTBF is suitable for deciding
1681 whether a node is "likely to stay up." We need both, because
1682 "usually up" is a good requirement for guards, while "likely to
1683 stay up" is a good requirement for long-lived connections.
1685 o Major features (v3 directory system):
1686 - Caches now download v3 network status documents as needed,
1687 and download the descriptors listed in them.
1688 - All hosts now attempt to download and keep fresh v3 authority
1689 certificates, and re-attempt after failures.
1690 - More internal-consistency checks for vote parsing.
1692 o Major bugfixes (crashes):
1693 - If a connection is shut down abruptly because of something that
1694 happened inside connection_flushed_some(), do not call
1695 connection_finished_flushing(). Should fix bug 451. Bugfix on
1698 o Major bugfixes (performance):
1699 - Fix really bad O(n^2) performance when parsing a long list of
1700 routers: Instead of searching the entire list for an "extra-info "
1701 string which usually wasn't there, once for every routerinfo
1702 we read, just scan lines forward until we find one we like.
1704 - When we add data to a write buffer in response to the data on that
1705 write buffer getting low because of a flush, do not consider the
1706 newly added data as a candidate for immediate flushing, but rather
1707 make it wait until the next round of writing. Otherwise, we flush
1708 and refill recursively, and a single greedy TLS connection can
1709 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
1711 o Minor features (v3 authority system):
1712 - Add more ways for tools to download the votes that lead to the
1714 - Send a 503 when low on bandwidth and a vote, consensus, or
1715 certificate is requested.
1716 - If-modified-since is now implemented properly for all kinds of
1717 certificate requests.
1719 o Minor bugfixes (network statuses):
1720 - Tweak the implementation of proposal 109 slightly: allow at most
1721 two Tor servers on the same IP address, except if it's the location
1722 of a directory authority, in which case allow five. Bugfix on
1725 o Minor bugfixes (controller):
1726 - When sending a status event to the controller telling it that an
1727 OR address is reachable, set the port correctly. (Previously we
1728 were reporting the dir port.) Bugfix on 0.1.2.x.
1730 o Minor bugfixes (v3 directory system):
1731 - Fix logic to look up a cert by its signing key digest. Bugfix on
1733 - Only change the reply to a vote to "OK" if it's not already
1734 set. This gets rid of annoying "400 OK" log messages, which may
1735 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
1736 - When we get a valid consensus, recompute the voting schedule.
1737 - Base the valid-after time of a vote on the consensus voting
1738 schedule, not on our preferred schedule.
1739 - Make the return values and messages from signature uploads and
1740 downloads more sensible.
1741 - Fix a memory leak when serving votes and consensus documents, and
1742 another when serving certificates.
1744 o Minor bugfixes (performance):
1745 - Use a slightly simpler string hashing algorithm (copying Python's
1746 instead of Java's) and optimize our digest hashing algorithm to take
1747 advantage of 64-bit platforms and to remove some possibly-costly
1749 - Fix a minor memory leak whenever we parse guards from our state
1750 file. Bugfix on 0.2.0.7-alpha.
1751 - Fix a minor memory leak whenever we write out a file. Bugfix on
1753 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
1754 command. Bugfix on 0.2.0.5-alpha.
1756 o Minor bugfixes (portability):
1757 - On some platforms, accept() can return a broken address. Detect
1758 this more quietly, and deal accordingly. Fixes bug 483.
1759 - Stop calling tor_strlower() on uninitialized memory in some cases.
1760 Bugfix in 0.2.0.7-alpha.
1762 o Minor bugfixes (usability):
1763 - Treat some 403 responses from directory servers as INFO rather than
1764 WARN-severity events.
1765 - It's not actually an error to find a non-pending entry in the DNS
1766 cache when canceling a pending resolve. Don't log unless stuff is
1767 fishy. Resolves bug 463.
1769 o Minor bugfixes (anonymity):
1770 - Never report that we've used more bandwidth than we're willing to
1771 relay: it leaks how much non-relay traffic we're using. Resolves
1773 - When looking for a circuit to cannibalize, consider family as well
1774 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
1775 circuit cannibalization).
1777 o Code simplifications and refactoring:
1778 - Make a bunch of functions static. Remove some dead code.
1779 - Pull out about a third of the really big routerlist.c; put it in a
1780 new module, networkstatus.c.
1781 - Merge the extra fields in local_routerstatus_t back into
1782 routerstatus_t: we used to need one routerstatus_t for each
1783 authority's opinion, plus a local_routerstatus_t for the locally
1784 computed consensus opinion. To save space, we put the locally
1785 modified fields into local_routerstatus_t, and only the common
1786 stuff into routerstatus_t. But once v3 directories are in use,
1787 clients and caches will no longer need to hold authority opinions;
1788 thus, the rationale for keeping the types separate is now gone.
1789 - Make the code used to reschedule and reattempt downloads more
1791 - Turn all 'Are we a directory server/mirror?' logic into a call to
1793 - Remove the code to generate the oldest (v1) directory format.
1794 The code has been disabled since 0.2.0.5-alpha.
1797 Changes in version 0.2.0.7-alpha - 2007-09-21
1798 This seventh development snapshot makes bridges work again, makes bridge
1799 authorities work for the first time, fixes two huge performance flaws
1800 in hidden services, and fixes a variety of minor issues.
1802 o New directory authorities:
1803 - Set up moria1 and tor26 as the first v3 directory authorities. See
1804 doc/spec/dir-spec.txt for details on the new directory design.
1806 o Major bugfixes (crashes):
1807 - Fix possible segfaults in functions called from
1808 rend_process_relay_cell(). Bugfix on 0.1.2.x.
1810 o Major bugfixes (bridges):
1811 - Fix a bug that made servers send a "404 Not found" in response to
1812 attempts to fetch their server descriptor. This caused Tor servers
1813 to take many minutes to establish reachability for their DirPort,
1814 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
1815 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
1816 users configure that and specify a bridge with an identity
1817 fingerprint, now they will lookup the bridge descriptor at the
1818 default bridge authority via a one-hop tunnel, but once circuits
1819 are established they will switch to a three-hop tunnel for later
1820 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
1822 o Major bugfixes (hidden services):
1823 - Hidden services were choosing introduction points uniquely by
1824 hexdigest, but when constructing the hidden service descriptor
1825 they merely wrote the (potentially ambiguous) nickname.
1826 - Clients now use the v2 intro format for hidden service
1827 connections: they specify their chosen rendezvous point by identity
1828 digest rather than by (potentially ambiguous) nickname. Both
1829 are bugfixes on 0.1.2.x, and they could speed up hidden service
1830 connections dramatically. Thanks to Karsten Loesing.
1832 o Minor features (security):
1833 - As a client, do not believe any server that tells us that an
1834 address maps to an internal address space.
1835 - Make it possible to enable HashedControlPassword and
1836 CookieAuthentication at the same time.
1838 o Minor features (guard nodes):
1839 - Tag every guard node in our state file with the version that
1840 we believe added it, or with our own version if we add it. This way,
1841 if a user temporarily runs an old version of Tor and then switches
1842 back to a new one, she doesn't automatically lose her guards.
1844 o Minor features (speed):
1845 - When implementing AES counter mode, update only the portions of the
1846 counter buffer that need to change, and don't keep separate
1847 network-order and host-order counters when they are the same (i.e.,
1848 on big-endian hosts.)
1850 o Minor features (controller):
1851 - Accept LF instead of CRLF on controller, since some software has a
1852 hard time generating real Internet newlines.
1853 - Add GETINFO values for the server status events
1854 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
1858 - Routers no longer include bandwidth-history lines in their
1859 descriptors; this information is already available in extra-info
1860 documents, and including it in router descriptors took up 60%
1861 (!) of compressed router descriptor downloads. Completes
1862 implementation of proposal 104.
1863 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
1864 and TorControl.py, as they use the old v0 controller protocol,
1865 and are obsoleted by TorFlow anyway.
1866 - Drop support for v1 rendezvous descriptors, since we never used
1867 them anyway, and the code has probably rotted by now. Based on
1868 patch from Karsten Loesing.
1869 - On OSX, stop warning the user that kqueue support in libevent is
1870 "experimental", since it seems to have worked fine for ages.
1873 - When generating information telling us how to extend to a given
1874 router, do not try to include the nickname if it is absent. Fixes
1875 bug 467. Bugfix on 0.2.0.3-alpha.
1876 - Fix a user-triggerable (but not remotely-triggerable) segfault
1877 in expand_filename(). Bugfix on 0.1.2.x.
1878 - Fix a memory leak when freeing incomplete requests from DNSPort.
1879 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
1880 - Don't try to access (or alter) the state file when running
1881 --list-fingerprint or --verify-config or --hash-password. (Resolves
1882 bug 499.) Bugfix on 0.1.2.x.
1883 - Servers used to decline to publish their DirPort if their
1884 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
1885 were below a threshold. Now they only look at BandwidthRate and
1886 RelayBandwidthRate. Bugfix on 0.1.2.x.
1887 - Remove an optimization in the AES counter-mode code that assumed
1888 that the counter never exceeded 2^68. When the counter can be set
1889 arbitrarily as an IV (as it is by Karsten's new hidden services
1890 code), this assumption no longer holds. Bugfix on 0.1.2.x.
1891 - Resume listing "AUTHORITY" flag for authorities in network status.
1892 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
1894 o Code simplifications and refactoring:
1895 - Revamp file-writing logic so we don't need to have the entire
1896 contents of a file in memory at once before we write to disk. Tor,
1898 - Turn "descriptor store" into a full-fledged type.
1899 - Move all NT services code into a separate source file.
1900 - Unify all code that computes medians, percentile elements, etc.
1901 - Get rid of a needless malloc when parsing address policies.
1904 Changes in version 0.1.2.17 - 2007-08-30
1905 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
1906 X bundles. Vidalia 0.0.14 makes authentication required for the
1907 ControlPort in the default configuration, which addresses important
1908 security risks. Everybody who uses Vidalia (or another controller)
1911 In addition, this Tor update fixes major load balancing problems with
1912 path selection, which should speed things up a lot once many people
1915 o Major bugfixes (security):
1916 - We removed support for the old (v0) control protocol. It has been
1917 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
1918 become more of a headache than it's worth.
1920 o Major bugfixes (load balancing):
1921 - When choosing nodes for non-guard positions, weight guards
1922 proportionally less, since they already have enough load. Patch
1924 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
1925 will allow fast Tor servers to get more attention.
1926 - When we're upgrading from an old Tor version, forget our current
1927 guards and pick new ones according to the new weightings. These
1928 three load balancing patches could raise effective network capacity
1929 by a factor of four. Thanks to Mike Perry for measurements.
1931 o Major bugfixes (stream expiration):
1932 - Expire not-yet-successful application streams in all cases if
1933 they've been around longer than SocksTimeout. Right now there are
1934 some cases where the stream will live forever, demanding a new
1935 circuit every 15 seconds. Fixes bug 454; reported by lodger.
1937 o Minor features (controller):
1938 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
1939 is valid before any authentication has been received. It tells
1940 a controller what kind of authentication is expected, and what
1941 protocol is spoken. Implements proposal 119.
1943 o Minor bugfixes (performance):
1944 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
1945 greatly speeding up loading cached-routers from disk on startup.
1946 - Disable sentinel-based debugging for buffer code: we squashed all
1947 the bugs that this was supposed to detect a long time ago, and now
1948 its only effect is to change our buffer sizes from nice powers of
1949 two (which platform mallocs tend to like) to values slightly over
1950 powers of two (which make some platform mallocs sad).
1952 o Minor bugfixes (misc):
1953 - If exit bandwidth ever exceeds one third of total bandwidth, then
1954 use the correct formula to weight exit nodes when choosing paths.
1955 Based on patch from Mike Perry.
1956 - Choose perfectly fairly among routers when choosing by bandwidth and
1957 weighting by fraction of bandwidth provided by exits. Previously, we
1958 would choose with only approximate fairness, and correct ourselves
1959 if we ran off the end of the list.
1960 - If we require CookieAuthentication but we fail to write the
1961 cookie file, we would warn but not exit, and end up in a state
1962 where no controller could authenticate. Now we exit.
1963 - If we require CookieAuthentication, stop generating a new cookie
1964 every time we change any piece of our config.
1965 - Refuse to start with certain directory authority keys, and
1966 encourage people using them to stop.
1967 - Terminate multi-line control events properly. Original patch
1969 - Fix a minor memory leak when we fail to find enough suitable
1970 servers to choose a circuit.
1971 - Stop leaking part of the descriptor when we run into a particularly
1972 unparseable piece of it.
1975 Changes in version 0.2.0.6-alpha - 2007-08-26
1976 This sixth development snapshot features a new Vidalia version in the
1977 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
1978 the ControlPort in the default configuration, which addresses important
1981 In addition, this snapshot fixes major load balancing problems
1982 with path selection, which should speed things up a lot once many
1983 people have upgraded. The directory authorities also use a new
1984 mean-time-between-failure approach to tracking which servers are stable,
1985 rather than just looking at the most recent uptime.
1987 o New directory authorities:
1988 - Set up Tonga as the default bridge directory authority.
1991 - Directory authorities now track servers by weighted
1992 mean-times-between-failures. When we have 4 or more days of data,
1993 use measured MTBF rather than declared uptime to decide whether
1994 to call a router Stable. Implements proposal 108.
1996 o Major bugfixes (load balancing):
1997 - When choosing nodes for non-guard positions, weight guards
1998 proportionally less, since they already have enough load. Patch
2000 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
2001 will allow fast Tor servers to get more attention.
2002 - When we're upgrading from an old Tor version, forget our current
2003 guards and pick new ones according to the new weightings. These
2004 three load balancing patches could raise effective network capacity
2005 by a factor of four. Thanks to Mike Perry for measurements.
2007 o Major bugfixes (descriptor parsing):
2008 - Handle unexpected whitespace better in malformed descriptors. Bug
2009 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
2012 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
2013 GETINFO for Torstat to use until it can switch to using extrainfos.
2014 - Optionally (if built with -DEXPORTMALLINFO) export the output
2015 of mallinfo via http, as tor/mallinfo.txt. Only accessible
2019 - Do not intermix bridge routers with controller-added
2020 routers. (Bugfix on 0.2.0.x)
2021 - Do not fail with an assert when accept() returns an unexpected
2022 address family. Addresses but does not wholly fix bug 483. (Bugfix
2024 - Let directory authorities startup even when they can't generate
2025 a descriptor immediately, e.g. because they don't know their
2027 - Stop putting the authentication cookie in a file called "0"
2028 in your working directory if you don't specify anything for the
2029 new CookieAuthFile option. Reported by Matt Edman.
2030 - Make it possible to read the PROTOCOLINFO response in a way that
2031 conforms to our control-spec. Reported by Matt Edman.
2032 - Fix a minor memory leak when we fail to find enough suitable
2033 servers to choose a circuit. Bugfix on 0.1.2.x.
2034 - Stop leaking part of the descriptor when we run into a particularly
2035 unparseable piece of it. Bugfix on 0.1.2.x.
2036 - Unmap the extrainfo cache file on exit.
2039 Changes in version 0.2.0.5-alpha - 2007-08-19
2040 This fifth development snapshot fixes compilation on Windows again;
2041 fixes an obnoxious client-side bug that slowed things down and put
2042 extra load on the network; gets us closer to using the v3 directory
2043 voting scheme; makes it easier for Tor controllers to use cookie-based
2044 authentication; and fixes a variety of other bugs.
2047 - Version 1 directories are no longer generated in full. Instead,
2048 authorities generate and serve "stub" v1 directories that list
2049 no servers. This will stop Tor versions 0.1.0.x and earlier from
2050 working, but (for security reasons) nobody should be running those
2053 o Major bugfixes (compilation, 0.2.0.x):
2054 - Try to fix Win32 compilation again: improve checking for IPv6 types.
2055 - Try to fix MSVC compilation: build correctly on platforms that do
2056 not define s6_addr16 or s6_addr32.
2057 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
2060 o Major bugfixes (stream expiration):
2061 - Expire not-yet-successful application streams in all cases if
2062 they've been around longer than SocksTimeout. Right now there are
2063 some cases where the stream will live forever, demanding a new
2064 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
2067 o Minor features (directory servers):
2068 - When somebody requests a list of statuses or servers, and we have
2069 none of those, return a 404 rather than an empty 200.
2071 o Minor features (directory voting):
2072 - Store v3 consensus status consensuses on disk, and reload them
2075 o Minor features (security):
2076 - Warn about unsafe ControlPort configurations.
2077 - Refuse to start with certain directory authority keys, and
2078 encourage people using them to stop.
2080 o Minor features (controller):
2081 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
2082 is valid before any authentication has been received. It tells
2083 a controller what kind of authentication is expected, and what
2084 protocol is spoken. Implements proposal 119.
2085 - New config option CookieAuthFile to choose a new location for the
2086 cookie authentication file, and config option
2087 CookieAuthFileGroupReadable to make it group-readable.
2089 o Minor features (unit testing):
2090 - Add command-line arguments to unit-test executable so that we can
2091 invoke any chosen test from the command line rather than having
2092 to run the whole test suite at once; and so that we can turn on
2093 logging for the unit tests.
2095 o Minor bugfixes (on 0.1.2.x):
2096 - If we require CookieAuthentication but we fail to write the
2097 cookie file, we would warn but not exit, and end up in a state
2098 where no controller could authenticate. Now we exit.
2099 - If we require CookieAuthentication, stop generating a new cookie
2100 every time we change any piece of our config.
2101 - When loading bandwidth history, do not believe any information in
2102 the future. Fixes bug 434.
2103 - When loading entry guard information, do not believe any information
2105 - When we have our clock set far in the future and generate an
2106 onion key, then re-set our clock to be correct, we should not stop
2107 the onion key from getting rotated.
2108 - Clean up torrc sample config file.
2109 - Do not automatically run configure from autogen.sh. This
2110 non-standard behavior tended to annoy people who have built other
2113 o Minor bugfixes (on 0.2.0.x):
2114 - Fix a bug with AutomapHostsOnResolve that would always cause
2115 the second request to fail. Bug reported by Kate. Bugfix on
2117 - Fix a bug in ADDRMAP controller replies that would sometimes
2118 try to print a NULL. Patch from tup.
2119 - Read v3 directory authority keys from the right location.
2120 - Numerous bugfixes to directory voting code.
2123 Changes in version 0.1.2.16 - 2007-08-01
2124 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
2125 remote attacker in certain situations to rewrite the user's torrc
2126 configuration file. This can completely compromise anonymity of users
2127 in most configurations, including those running the Vidalia bundles,
2128 TorK, etc. Or worse.
2130 o Major security fixes:
2131 - Close immediately after missing authentication on control port;
2132 do not allow multiple authentication attempts.
2135 Changes in version 0.2.0.4-alpha - 2007-08-01
2136 This fourth development snapshot fixes a critical security vulnerability
2137 for most users, specifically those running Vidalia, TorK, etc. Everybody
2138 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
2140 o Major security fixes:
2141 - Close immediately after missing authentication on control port;
2142 do not allow multiple authentication attempts.
2144 o Major bugfixes (compilation):
2145 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
2148 o Minor features (performance):
2149 - Be even more aggressive about releasing RAM from small
2150 empty buffers. Thanks to our free-list code, this shouldn't be too
2151 performance-intensive.
2152 - Disable sentinel-based debugging for buffer code: we squashed all
2153 the bugs that this was supposed to detect a long time ago, and
2154 now its only effect is to change our buffer sizes from nice
2155 powers of two (which platform mallocs tend to like) to values
2156 slightly over powers of two (which make some platform mallocs sad).
2157 - Log malloc statistics from mallinfo() on platforms where it
2161 Changes in version 0.2.0.3-alpha - 2007-07-29
2162 This third development snapshot introduces new experimental
2163 blocking-resistance features and a preliminary version of the v3
2164 directory voting design, and includes many other smaller features
2168 - The first pieces of our "bridge" design for blocking-resistance
2169 are implemented. People can run bridge directory authorities;
2170 people can run bridges; and people can configure their Tor clients
2171 with a set of bridges to use as the first hop into the Tor network.
2172 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
2174 - Create listener connections before we setuid to the configured
2175 User and Group. Now non-Windows users can choose port values
2176 under 1024, start Tor as root, and have Tor bind those ports
2177 before it changes to another UID. (Windows users could already
2179 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
2180 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
2181 on "vserver" accounts. (Patch from coderman.)
2182 - Be even more aggressive about separating local traffic from relayed
2183 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
2185 o Major features (experimental):
2186 - First cut of code for "v3 dir voting": directory authorities will
2187 vote on a common network status document rather than each publishing
2188 their own opinion. This code needs more testing and more corner-case
2189 handling before it's ready for use.
2192 - Directory authorities now call routers Fast if their bandwidth is
2193 at least 100KB/s, and consider their bandwidth adequate to be a
2194 Guard if it is at least 250KB/s, no matter the medians. This fix
2195 complements proposal 107. [Bugfix on 0.1.2.x]
2196 - Directory authorities now never mark more than 3 servers per IP as
2197 Valid and Running. (Implements proposal 109, by Kevin Bauer and
2199 - Minor change to organizationName and commonName generation
2200 procedures in TLS certificates during Tor handshakes, to invalidate
2201 some earlier censorware approaches. This is not a long-term
2202 solution, but applying it will give us a bit of time to look into
2203 the epidemiology of countermeasures as they spread.
2205 o Major bugfixes (directory):
2206 - Rewrite directory tokenization code to never run off the end of
2207 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
2209 o Minor features (controller):
2210 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
2211 match requests to applications. (Patch from Robert Hogan.)
2212 - Report address and port correctly on connections to DNSPort. (Patch
2214 - Add a RESOLVE command to launch hostname lookups. (Original patch
2216 - Add GETINFO status/enough-dir-info to let controllers tell whether
2217 Tor has downloaded sufficient directory information. (Patch
2219 - You can now use the ControlSocket option to tell Tor to listen for
2220 controller connections on Unix domain sockets on systems that
2221 support them. (Patch from Peter Palfrader.)
2222 - STREAM NEW events are generated for DNSPort requests and for
2223 tunneled directory connections. (Patch from Robert Hogan.)
2224 - New "GETINFO address-mappings/*" command to get address mappings
2225 with expiry information. "addr-mappings/*" is now deprecated.
2228 o Minor features (misc):
2229 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
2231 - The tor-gencert tool for v3 directory authorities now creates all
2232 files as readable to the file creator only, and write-protects
2233 the authority identity key.
2234 - When dumping memory usage, list bytes used in buffer memory
2236 - When running with dmalloc, dump more stats on hup and on exit.
2237 - Directory authorities now fail quickly and (relatively) harmlessly
2238 if they generate a network status document that is somehow
2241 o Traffic load balancing improvements:
2242 - If exit bandwidth ever exceeds one third of total bandwidth, then
2243 use the correct formula to weight exit nodes when choosing paths.
2244 (Based on patch from Mike Perry.)
2245 - Choose perfectly fairly among routers when choosing by bandwidth and
2246 weighting by fraction of bandwidth provided by exits. Previously, we
2247 would choose with only approximate fairness, and correct ourselves
2248 if we ran off the end of the list. [Bugfix on 0.1.2.x]
2250 o Performance improvements:
2251 - Be more aggressive with freeing buffer RAM or putting it on the
2253 - Use Critical Sections rather than Mutexes for synchronizing threads
2254 on win32; Mutexes are heavier-weight, and designed for synchronizing
2257 o Deprecated and removed features:
2258 - RedirectExits is now deprecated.
2259 - Stop allowing address masks that do not correspond to bit prefixes.
2260 We have warned about these for a really long time; now it's time
2261 to reject them. (Patch from croup.)
2263 o Minor bugfixes (directory):
2264 - Fix another crash bug related to extra-info caching. (Bug found by
2265 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
2266 - Directories no longer return a "304 not modified" when they don't
2267 have the networkstatus the client asked for. Also fix a memory
2268 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
2269 - We had accidentally labelled 0.1.2.x directory servers as not
2270 suitable for begin_dir requests, and had labelled no directory
2271 servers as suitable for uploading extra-info documents. [Bugfix
2274 o Minor bugfixes (dns):
2275 - Fix a crash when DNSPort is set more than once. (Patch from Robert
2276 Hogan.) [Bugfix on 0.2.0.2-alpha]
2277 - Add DNSPort connections to the global connection list, so that we
2278 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
2280 - Fix a dangling reference that could lead to a crash when DNSPort is
2281 changed or closed (Patch from Robert Hogan.) [Bugfix on
2284 o Minor bugfixes (controller):
2285 - Provide DNS expiry times in GMT, not in local time. For backward
2286 compatibility, ADDRMAP events only provide GMT expiry in an extended
2287 field. "GETINFO address-mappings" always does the right thing.
2288 - Use CRLF line endings properly in NS events.
2289 - Terminate multi-line control events properly. (Original patch
2290 from tup.) [Bugfix on 0.1.2.x-alpha]
2291 - Do not include spaces in SOURCE_ADDR fields in STREAM
2292 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
2295 Changes in version 0.1.2.15 - 2007-07-17
2296 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
2297 problems, fixes compilation on BSD, and fixes a variety of other
2298 bugs. Everybody should upgrade.
2300 o Major bugfixes (compilation):
2301 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
2303 o Major bugfixes (crashes):
2304 - Try even harder not to dereference the first character after
2305 an mmap(). Reported by lodger.
2306 - Fix a crash bug in directory authorities when we re-number the
2307 routerlist while inserting a new router.
2308 - When the cached-routers file is an even multiple of the page size,
2309 don't run off the end and crash. (Fixes bug 455; based on idea
2311 - Fix eventdns.c behavior on Solaris: It is critical to include
2312 orconfig.h _before_ sys/types.h, so that we can get the expected
2313 definition of _FILE_OFFSET_BITS.
2315 o Major bugfixes (security):
2316 - Fix a possible buffer overrun when using BSD natd support. Bug
2318 - When sending destroy cells from a circuit's origin, don't include
2319 the reason for tearing down the circuit. The spec says we didn't,
2320 and now we actually don't. Reported by lodger.
2321 - Keep streamids from different exits on a circuit separate. This
2322 bug may have allowed other routers on a given circuit to inject
2323 cells into streams. Reported by lodger; fixes bug 446.
2324 - If there's a never-before-connected-to guard node in our list,
2325 never choose any guards past it. This way we don't expand our
2326 guard list unless we need to.
2328 o Minor bugfixes (guard nodes):
2329 - Weight guard selection by bandwidth, so that low-bandwidth nodes
2330 don't get overused as guards.
2332 o Minor bugfixes (directory):
2333 - Correctly count the number of authorities that recommend each
2334 version. Previously, we were under-counting by 1.
2335 - Fix a potential crash bug when we load many server descriptors at
2336 once and some of them make others of them obsolete. Fixes bug 458.
2338 o Minor bugfixes (hidden services):
2339 - Stop tearing down the whole circuit when the user asks for a
2340 connection to a port that the hidden service didn't configure.
2343 o Minor bugfixes (misc):
2344 - On Windows, we were preventing other processes from reading
2345 cached-routers while Tor was running. Reported by janbar.
2346 - Fix a possible (but very unlikely) bug in picking routers by
2347 bandwidth. Add a log message to confirm that it is in fact
2348 unlikely. Patch from lodger.
2349 - Backport a couple of memory leak fixes.
2350 - Backport miscellaneous cosmetic bugfixes.
2353 Changes in version 0.2.0.2-alpha - 2007-06-02
2354 o Major bugfixes on 0.2.0.1-alpha:
2355 - Fix an assertion failure related to servers without extra-info digests.
2356 Resolves bugs 441 and 442.
2358 o Minor features (directory):
2359 - Support "If-Modified-Since" when answering HTTP requests for
2360 directories, running-routers documents, and network-status documents.
2361 (There's no need to support it for router descriptors, since those
2362 are downloaded by descriptor digest.)
2364 o Minor build issues:
2365 - Clear up some MIPSPro compiler warnings.
2366 - When building from a tarball on a machine that happens to have SVK
2367 installed, report the micro-revision as whatever version existed
2368 in the tarball, not as "x".
2371 Changes in version 0.2.0.1-alpha - 2007-06-01
2372 This early development snapshot provides new features for people running
2373 Tor as both a client and a server (check out the new RelayBandwidth
2374 config options); lets Tor run as a DNS proxy; and generally moves us
2375 forward on a lot of fronts.
2377 o Major features, server usability:
2378 - New config options RelayBandwidthRate and RelayBandwidthBurst:
2379 a separate set of token buckets for relayed traffic. Right now
2380 relayed traffic is defined as answers to directory requests, and
2381 OR connections that don't have any local circuits on them.
2383 o Major features, client usability:
2384 - A client-side DNS proxy feature to replace the need for
2385 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
2386 for DNS requests on port 9999, use the Tor network to resolve them
2387 anonymously, and send the reply back like a regular DNS server.
2388 The code still only implements a subset of DNS.
2389 - Make PreferTunneledDirConns and TunnelDirConns work even when
2390 we have no cached directory info. This means Tor clients can now
2391 do all of their connections protected by TLS.
2393 o Major features, performance and efficiency:
2394 - Directory authorities accept and serve "extra info" documents for
2395 routers. These documents contain fields from router descriptors
2396 that aren't usually needed, and that use a lot of excess
2397 bandwidth. Once these fields are removed from router descriptors,
2398 the bandwidth savings should be about 60%. [Partially implements
2400 - Servers upload extra-info documents to any authority that accepts
2401 them. Authorities (and caches that have been configured to download
2402 extra-info documents) download them as needed. [Partially implements
2404 - Change the way that Tor buffers data that it is waiting to write.
2405 Instead of queueing data cells in an enormous ring buffer for each
2406 client->OR or OR->OR connection, we now queue cells on a separate
2407 queue for each circuit. This lets us use less slack memory, and
2408 will eventually let us be smarter about prioritizing different kinds
2410 - Use memory pools to allocate cells with better speed and memory
2411 efficiency, especially on platforms where malloc() is inefficient.
2412 - Stop reading on edge connections when their corresponding circuit
2413 buffers are full; start again as the circuits empty out.
2415 o Major features, other:
2416 - Add an HSAuthorityRecordStats option that hidden service authorities
2417 can use to track statistics of overall hidden service usage without
2418 logging information that would be very useful to an attacker.
2419 - Start work implementing multi-level keys for directory authorities:
2420 Add a standalone tool to generate key certificates. (Proposal 103.)
2423 - Directory authorities now call routers Stable if they have an
2424 uptime of at least 30 days, even if that's not the median uptime
2425 in the network. Implements proposal 107, suggested by Kevin Bauer
2428 o Minor fixes (resource management):
2429 - Count the number of open sockets separately from the number
2430 of active connection_t objects. This will let us avoid underusing
2431 our allocated connection limit.
2432 - We no longer use socket pairs to link an edge connection to an
2433 anonymous directory connection or a DirPort test connection.
2434 Instead, we track the link internally and transfer the data
2435 in-process. This saves two sockets per "linked" connection (at the
2436 client and at the server), and avoids the nasty Windows socketpair()
2438 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
2439 for every single inactive connection_t. Free items from the
2440 4k/16k-buffer free lists when they haven't been used for a while.
2442 o Minor features (build):
2443 - Make autoconf search for libevent, openssl, and zlib consistently.
2444 - Update deprecated macros in configure.in.
2445 - When warning about missing headers, tell the user to let us
2446 know if the compile succeeds anyway, so we can downgrade the
2448 - Include the current subversion revision as part of the version
2449 string: either fetch it directly if we're in an SVN checkout, do
2450 some magic to guess it if we're in an SVK checkout, or use
2451 the last-detected version if we're building from a .tar.gz.
2452 Use this version consistently in log messages.
2454 o Minor features (logging):
2455 - Always prepend "Bug: " to any log message about a bug.
2456 - Put a platform string (e.g. "Linux i686") in the startup log
2457 message, so when people paste just their logs, we know if it's
2458 OpenBSD or Windows or what.
2459 - When logging memory usage, break down memory used in buffers by
2462 o Minor features (directory system):
2463 - New config option V2AuthoritativeDirectory that all directory
2464 authorities should set. This will let future authorities choose
2465 not to serve V2 directory information.
2466 - Directory authorities allow multiple router descriptors and/or extra
2467 info documents to be uploaded in a single go. This will make
2468 implementing proposal 104 simpler.
2470 o Minor features (controller):
2471 - Add a new config option __DisablePredictedCircuits designed for
2472 use by the controller, when we don't want Tor to build any circuits
2474 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
2475 so we can exit from the middle of the circuit.
2476 - Implement "getinfo status/circuit-established".
2477 - Implement "getinfo status/version/..." so a controller can tell
2478 whether the current version is recommended, and whether any versions
2479 are good, and how many authorities agree. (Patch from shibz.)
2481 o Minor features (hidden services):
2482 - Allow multiple HiddenServicePort directives with the same virtual
2483 port; when they occur, the user is sent round-robin to one
2484 of the target ports chosen at random. Partially fixes bug 393 by
2485 adding limited ad-hoc round-robining.
2487 o Minor features (other):
2489 - Add a new AutomapHostsOnResolve option: when it is enabled, any
2490 resolve request for hosts matching a given pattern causes Tor to
2491 generate an internal virtual address mapping for that host. This
2492 allows DNSPort to work sensibly with hidden service users. By
2493 default, .exit and .onion addresses are remapped; the list of
2494 patterns can be reconfigured with AutomapHostsSuffixes.
2495 - Add an "-F" option to tor-resolve to force a resolve for a .onion
2496 address. Thanks to the AutomapHostsOnResolve option, this is no
2497 longer a completely silly thing to do.
2498 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
2499 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
2500 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
2501 minus 1 byte: the actual maximum declared bandwidth.
2504 - Removed support for the old binary "version 0" controller protocol.
2505 This has been deprecated since 0.1.1, and warnings have been issued
2506 since 0.1.2. When we encounter a v0 control message, we now send
2507 back an error and close the connection.
2508 - Remove the old "dns worker" server DNS code: it hasn't been default
2509 since 0.1.2.2-alpha, and all the servers seem to be using the new
2512 o Minor bugfixes (portability):
2513 - Even though Windows is equally happy with / and \ as path separators,
2514 try to use \ consistently on Windows and / consistently on Unix: it
2515 makes the log messages nicer.
2516 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
2517 - Read resolv.conf files correctly on platforms where read() returns
2518 partial results on small file reads.
2520 o Minor bugfixes (directory):
2521 - Correctly enforce that elements of directory objects do not appear
2522 more often than they are allowed to appear.
2523 - When we are reporting the DirServer line we just parsed, we were
2524 logging the second stanza of the key fingerprint, not the first.
2526 o Minor bugfixes (logging):
2527 - When we hit an EOF on a log (probably because we're shutting down),
2528 don't try to remove the log from the list: just mark it as
2529 unusable. (Bulletproofs against bug 222.)
2531 o Minor bugfixes (other):
2532 - In the exitlist script, only consider the most recently published
2533 server descriptor for each server. Also, when the user requests
2534 a list of servers that _reject_ connections to a given address,
2535 explicitly exclude the IPs that also have servers that accept
2536 connections to that address. (Resolves bug 405.)
2537 - Stop allowing hibernating servers to be "stable" or "fast".
2538 - On Windows, we were preventing other processes from reading
2539 cached-routers while Tor was running. (Reported by janbar)
2540 - Make the NodeFamilies config option work. (Reported by
2541 lodger -- it has never actually worked, even though we added it
2543 - Check return values from pthread_mutex functions.
2544 - Don't save non-general-purpose router descriptors to the disk cache,
2545 because we have no way of remembering what their purpose was when
2547 - Add even more asserts to hunt down bug 417.
2548 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
2549 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
2550 Add a log message to confirm that it is in fact unlikely.
2552 o Minor bugfixes (controller):
2553 - Make 'getinfo fingerprint' return a 551 error if we're not a
2554 server, so we match what the control spec claims we do. Reported
2556 - Fix a typo in an error message when extendcircuit fails that
2557 caused us to not follow the \r\n-based delimiter protocol. Reported
2560 o Code simplifications and refactoring:
2561 - Stop passing around circuit_t and crypt_path_t pointers that are
2562 implicit in other procedure arguments.
2563 - Drop the old code to choke directory connections when the
2564 corresponding OR connections got full: thanks to the cell queue
2565 feature, OR conns don't get full any more.
2566 - Make dns_resolve() handle attaching connections to circuits
2567 properly, so the caller doesn't have to.
2568 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
2569 - Keep the connection array as a dynamic smartlist_t, rather than as
2570 a fixed-sized array. This is important, as the number of connections
2571 is becoming increasingly decoupled from the number of sockets.
2574 Changes in version 0.1.2.14 - 2007-05-25
2575 Tor 0.1.2.14 changes the addresses of two directory authorities (this
2576 change especially affects those who serve or use hidden services),
2577 and fixes several other crash- and security-related bugs.
2579 o Directory authority changes:
2580 - Two directory authorities (moria1 and moria2) just moved to new
2581 IP addresses. This change will particularly affect those who serve
2582 or use hidden services.
2584 o Major bugfixes (crashes):
2585 - If a directory server runs out of space in the connection table
2586 as it's processing a begin_dir request, it will free the exit stream
2587 but leave it attached to the circuit, leading to unpredictable
2588 behavior. (Reported by seeess, fixes bug 425.)
2589 - Fix a bug in dirserv_remove_invalid() that would cause authorities
2590 to corrupt memory under some really unlikely scenarios.
2591 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
2592 - Avoid segfaults when reading from mmaped descriptor file. (Reported
2595 o Major bugfixes (security):
2596 - When choosing an entry guard for a circuit, avoid using guards
2597 that are in the same family as the chosen exit -- not just guards
2598 that are exactly the chosen exit. (Reported by lodger.)
2600 o Major bugfixes (resource management):
2601 - If a directory authority is down, skip it when deciding where to get
2602 networkstatus objects or descriptors. Otherwise we keep asking
2603 every 10 seconds forever. Fixes bug 384.
2604 - Count it as a failure if we fetch a valid network-status but we
2605 don't want to keep it. Otherwise we'll keep fetching it and keep
2606 not wanting to keep it. Fixes part of bug 422.
2607 - If all of our dirservers have given us bad or no networkstatuses
2608 lately, then stop hammering them once per minute even when we
2609 think they're failed. Fixes another part of bug 422.
2612 - Actually set the purpose correctly for descriptors inserted with
2614 - When we have k non-v2 authorities in our DirServer config,
2615 we ignored the last k authorities in the list when updating our
2617 - Correctly back-off from requesting router descriptors that we are
2618 having a hard time downloading.
2619 - Read resolv.conf files correctly on platforms where read() returns
2620 partial results on small file reads.
2621 - Don't rebuild the entire router store every time we get 32K of
2622 routers: rebuild it when the journal gets very large, or when
2623 the gaps in the store get very large.
2626 - When routers publish SVN revisions in their router descriptors,
2627 authorities now include those versions correctly in networkstatus
2629 - Warn when using a version of libevent before 1.3b to run a server on
2630 OSX or BSD: these versions interact badly with userspace threads.
2633 Changes in version 0.1.2.13 - 2007-04-24
2634 This release features some major anonymity fixes, such as safer path
2635 selection; better client performance; faster bootstrapping, better
2636 address detection, and better DNS support for servers; write limiting as
2637 well as read limiting to make servers easier to run; and a huge pile of
2638 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
2640 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
2641 of the Freenode IRC network, remembering his patience and vision for
2642 free speech on the Internet.
2645 - Fix a memory leak when we ask for "all" networkstatuses and we
2646 get one we don't recognize.
2647 - Add more asserts to hunt down bug 417.
2648 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
2651 Changes in version 0.1.2.12-rc - 2007-03-16
2653 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
2654 directory information requested inside Tor connections (i.e. via
2655 begin_dir cells). It only triggered when the same connection was
2656 serving other data at the same time. Reported by seeess.
2659 - When creating a circuit via the controller, send a 'launched'
2660 event when we're done, so we follow the spec better.
2663 Changes in version 0.1.2.11-rc - 2007-03-15
2664 o Minor bugfixes (controller), reported by daejees:
2665 - Correct the control spec to match how the code actually responds
2666 to 'getinfo addr-mappings/*'.
2667 - The control spec described a GUARDS event, but the code
2668 implemented a GUARD event. Standardize on GUARD, but let people
2672 Changes in version 0.1.2.10-rc - 2007-03-07
2673 o Major bugfixes (Windows):
2674 - Do not load the NT services library functions (which may not exist)
2675 just to detect if we're a service trying to shut down. Now we run
2676 on Win98 and friends again.
2678 o Minor bugfixes (other):
2679 - Clarify a couple of log messages.
2680 - Fix a misleading socks5 error number.
2683 Changes in version 0.1.2.9-rc - 2007-03-02
2684 o Major bugfixes (Windows):
2685 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
2686 of the usual GCC "%llu". This prevents a bug when saving 64-bit
2687 int configuration values: the high-order 32 bits would get
2688 truncated. In particular, we were being bitten by the default
2689 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
2690 and maybe also bug 397.)
2692 o Minor bugfixes (performance):
2693 - Use OpenSSL's AES implementation on platforms where it's faster.
2694 This could save us as much as 10% CPU usage.
2696 o Minor bugfixes (server):
2697 - Do not rotate onion key immediately after setting it for the first
2700 o Minor bugfixes (directory authorities):
2701 - Stop calling servers that have been hibernating for a long time
2702 "stable". Also, stop letting hibernating or obsolete servers affect
2703 uptime and bandwidth cutoffs.
2704 - Stop listing hibernating servers in the v1 directory.
2706 o Minor bugfixes (hidden services):
2707 - Upload hidden service descriptors slightly less often, to reduce
2708 load on authorities.
2710 o Minor bugfixes (other):
2711 - Fix an assert that could trigger if a controller quickly set then
2712 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
2713 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
2715 - Fix a potential race condition in the rpm installer. Found by
2717 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
2718 of 2 as indicating that the server is completely bad; it sometimes
2719 means that the server is just bad for the request in question. (may fix
2720 the last of bug 326.)
2721 - Disable encrypted directory connections when we don't have a server
2722 descriptor for the destination. We'll get this working again in
2726 Changes in version 0.1.2.8-beta - 2007-02-26
2727 o Major bugfixes (crashes):
2728 - Stop crashing when the controller asks us to resetconf more than
2729 one config option at once. (Vidalia 0.0.11 does this.)
2730 - Fix a crash that happened on Win98 when we're given command-line
2731 arguments: don't try to load NT service functions from advapi32.dll
2732 except when we need them. (Bug introduced in 0.1.2.7-alpha;
2734 - Fix a longstanding obscure crash bug that could occur when
2735 we run out of DNS worker processes. (Resolves bug 390.)
2737 o Major bugfixes (hidden services):
2738 - Correctly detect whether hidden service descriptor downloads are
2739 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
2741 o Major bugfixes (accounting):
2742 - When we start during an accounting interval before it's time to wake
2743 up, remember to wake up at the correct time. (May fix bug 342.)
2745 o Minor bugfixes (controller):
2746 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
2747 clear the corresponding on_circuit variable, and remember later
2748 that we don't need to send a redundant CLOSED event. (Resolves part
2750 - Report events where a resolve succeeded or where we got a socks
2751 protocol error correctly, rather than calling both of them
2753 - Change reported stream target addresses to IP consistently when
2754 we finally get the IP from an exit node.
2755 - Send log messages to the controller even if they happen to be very
2758 o Minor bugfixes (other):
2759 - Display correct results when reporting which versions are
2760 recommended, and how recommended they are. (Resolves bug 383.)
2761 - Improve our estimates for directory bandwidth to be less random:
2762 guess that an unrecognized directory will have the average bandwidth
2763 from all known directories, not that it will have the average
2764 bandwidth from those directories earlier than it on the list.
2765 - If we start a server with ClientOnly 1, then set ClientOnly to 0
2766 and hup, stop triggering an assert based on an empty onion_key.
2767 - On platforms with no working mmap() equivalent, don't warn the
2768 user when cached-routers doesn't exist.
2769 - Warn the user when mmap() [or its equivalent] fails for some reason
2770 other than file-not-found.
2771 - Don't warn the user when cached-routers.new doesn't exist: that's
2772 perfectly fine when starting up for the first time.
2773 - When EntryNodes are configured, rebuild the guard list to contain,
2774 in order: the EntryNodes that were guards before; the rest of the
2775 EntryNodes; the nodes that were guards before.
2776 - Mask out all signals in sub-threads; only the libevent signal
2777 handler should be processing them. This should prevent some crashes
2778 on some machines using pthreads. (Patch from coderman.)
2779 - Fix switched arguments on memset in the implementation of
2780 tor_munmap() for systems with no mmap() call.
2781 - When Tor receives a router descriptor that it asked for, but
2782 no longer wants (because it has received fresh networkstatuses
2783 in the meantime), do not warn the user. Cache the descriptor if
2784 we're a cache; drop it if we aren't.
2785 - Make earlier entry guards _really_ get retried when the network
2787 - On a malformed DNS reply, always give an error to the corresponding
2789 - Build with recent libevents on platforms that do not define the
2790 nonstandard types "u_int8_t" and friends.
2792 o Minor features (controller):
2793 - Warn the user when an application uses the obsolete binary v0
2794 control protocol. We're planning to remove support for it during
2795 the next development series, so it's good to give people some
2797 - Add STREAM_BW events to report per-entry-stream bandwidth
2798 use. (Patch from Robert Hogan.)
2799 - Rate-limit SIGNEWNYM signals in response to controllers that
2800 impolitely generate them for every single stream. (Patch from
2801 mwenge; closes bug 394.)
2802 - Make REMAP stream events have a SOURCE (cache or exit), and
2803 make them generated in every case where we get a successful
2804 connected or resolved cell.
2806 o Minor bugfixes (performance):
2807 - Call router_have_min_dir_info half as often. (This is showing up in
2808 some profiles, but not others.)
2809 - When using GCC, make log_debug never get called at all, and its
2810 arguments never get evaluated, when no debug logs are configured.
2811 (This is showing up in some profiles, but not others.)
2814 - Remove some never-implemented options. Mark PathlenCoinWeight as
2816 - Implement proposal 106: Stop requiring clients to have well-formed
2817 certificates; stop checking nicknames in certificates. (Clients
2818 have certificates so that they can look like Tor servers, but in
2819 the future we might want to allow them to look like regular TLS
2820 clients instead. Nicknames in certificates serve no purpose other
2821 than making our protocol easier to recognize on the wire.)
2822 - Revise messages on handshake failure again to be even more clear about
2823 which are incoming connections and which are outgoing.
2824 - Discard any v1 directory info that's over 1 month old (for
2825 directories) or over 1 week old (for running-routers lists).
2826 - Do not warn when individual nodes in the configuration's EntryNodes,
2827 ExitNodes, etc are down: warn only when all possible nodes
2828 are down. (Fixes bug 348.)
2829 - Always remove expired routers and networkstatus docs before checking
2830 whether we have enough information to build circuits. (Fixes
2832 - Put a lower-bound on MaxAdvertisedBandwidth.
2835 Changes in version 0.1.2.7-alpha - 2007-02-06
2836 o Major bugfixes (rate limiting):
2837 - Servers decline directory requests much more aggressively when
2838 they're low on bandwidth. Otherwise they end up queueing more and
2839 more directory responses, which can't be good for latency.
2840 - But never refuse directory requests from local addresses.
2841 - Fix a memory leak when sending a 503 response for a networkstatus
2843 - Be willing to read or write on local connections (e.g. controller
2844 connections) even when the global rate limiting buckets are empty.
2845 - If our system clock jumps back in time, don't publish a negative
2846 uptime in the descriptor. Also, don't let the global rate limiting
2847 buckets go absurdly negative.
2848 - Flush local controller connection buffers periodically as we're
2849 writing to them, so we avoid queueing 4+ megabytes of data before
2852 o Major bugfixes (NT services):
2853 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
2854 command-line flag so that admins can override the default by saying
2855 "tor --service install --user "SomeUser"". This will not affect
2856 existing installed services. Also, warn the user that the service
2857 will look for its configuration file in the service user's
2858 %appdata% directory. (We can't do the 'hardwire the user's appdata
2859 directory' trick any more, since we may not have read access to that
2862 o Major bugfixes (other):
2863 - Previously, we would cache up to 16 old networkstatus documents
2864 indefinitely, if they came from nontrusted authorities. Now we
2865 discard them if they are more than 10 days old.
2866 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
2868 - Detect and reject malformed DNS responses containing circular
2870 - If exits are rare enough that we're not marking exits as guards,
2871 ignore exit bandwidth when we're deciding the required bandwidth
2873 - When we're handling a directory connection tunneled over Tor,
2874 don't fill up internal memory buffers with all the data we want
2875 to tunnel; instead, only add it if the OR connection that will
2876 eventually receive it has some room for it. (This can lead to
2877 slowdowns in tunneled dir connections; a better solution will have
2880 o Minor bugfixes (dns):
2881 - Add some defensive programming to eventdns.c in an attempt to catch
2882 possible memory-stomping bugs.
2883 - Detect and reject DNS replies containing IPv4 or IPv6 records with
2884 an incorrect number of bytes. (Previously, we would ignore the
2886 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
2887 in the correct order, and doesn't crash.
2888 - Free memory held in recently-completed DNS lookup attempts on exit.
2889 This was not a memory leak, but may have been hiding memory leaks.
2890 - Handle TTL values correctly on reverse DNS lookups.
2891 - Treat failure to parse resolv.conf as an error.
2893 o Minor bugfixes (other):
2894 - Fix crash with "tor --list-fingerprint" (reported by seeess).
2895 - When computing clock skew from directory HTTP headers, consider what
2896 time it was when we finished asking for the directory, not what
2898 - Expire socks connections if they spend too long waiting for the
2899 handshake to finish. Previously we would let them sit around for
2900 days, if the connecting application didn't close them either.
2901 - And if the socks handshake hasn't started, don't send a
2902 "DNS resolve socks failed" handshake reply; just close it.
2903 - Stop using C functions that OpenBSD's linker doesn't like.
2904 - Don't launch requests for descriptors unless we have networkstatuses
2905 from at least half of the authorities. This delays the first
2906 download slightly under pathological circumstances, but can prevent
2907 us from downloading a bunch of descriptors we don't need.
2908 - Do not log IPs with TLS failures for incoming TLS
2909 connections. (Fixes bug 382.)
2910 - If the user asks to use invalid exit nodes, be willing to use
2912 - Stop using the reserved ac_cv namespace in our configure script.
2913 - Call stat() slightly less often; use fstat() when possible.
2914 - Refactor the way we handle pending circuits when an OR connection
2915 completes or fails, in an attempt to fix a rare crash bug.
2916 - Only rewrite a conn's address based on X-Forwarded-For: headers
2917 if it's a parseable public IP address; and stop adding extra quotes
2918 to the resulting address.
2921 - Weight directory requests by advertised bandwidth. Now we can
2922 let servers enable write limiting but still allow most clients to
2923 succeed at their directory requests. (We still ignore weights when
2924 choosing a directory authority; I hope this is a feature.)
2927 - Create a new file ReleaseNotes which was the old ChangeLog. The
2928 new ChangeLog file now includes the summaries for all development
2930 - Check for addresses with invalid characters at the exit as well
2931 as at the client, and warn less verbosely when they fail. You can
2932 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
2933 - Adapt a patch from goodell to let the contrib/exitlist script
2934 take arguments rather than require direct editing.
2935 - Inform the server operator when we decide not to advertise a
2936 DirPort due to AccountingMax enabled or a low BandwidthRate. It
2937 was confusing Zax, so now we're hopefully more helpful.
2938 - Bring us one step closer to being able to establish an encrypted
2939 directory tunnel without knowing a descriptor first. Still not
2940 ready yet. As part of the change, now assume we can use a
2941 create_fast cell if we don't know anything about a router.
2942 - Allow exit nodes to use nameservers running on ports other than 53.
2943 - Servers now cache reverse DNS replies.
2944 - Add an --ignore-missing-torrc command-line option so that we can
2945 get the "use sensible defaults if the configuration file doesn't
2946 exist" behavior even when specifying a torrc location on the command
2949 o Minor features (controller):
2950 - Track reasons for OR connection failure; make these reasons
2951 available via the controller interface. (Patch from Mike Perry.)
2952 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
2953 can learn when clients are sending malformed hostnames to Tor.
2954 - Clean up documentation for controller status events.
2955 - Add a REMAP status to stream events to note that a stream's
2956 address has changed because of a cached address or a MapAddress
2960 Changes in version 0.1.2.6-alpha - 2007-01-09
2962 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
2963 connection handles more than 4 gigs in either direction, we crash.
2964 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
2965 advertised exit node, somebody might try to exit from us when
2966 we're bootstrapping and before we've built our descriptor yet.
2967 Refuse the connection rather than crashing.
2970 - Warn if we (as a server) find that we've resolved an address that we
2971 weren't planning to resolve.
2972 - Warn that using select() on any libevent version before 1.1 will be
2973 unnecessarily slow (even for select()).
2974 - Flush ERR-level controller status events just like we currently
2975 flush ERR-level log events, so that a Tor shutdown doesn't prevent
2976 the controller from learning about current events.
2978 o Minor features (more controller status events):
2979 - Implement EXTERNAL_ADDRESS server status event so controllers can
2980 learn when our address changes.
2981 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
2982 can learn when directories reject our descriptor.
2983 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
2984 can learn when a client application is speaking a non-socks protocol
2986 - Implement DANGEROUS_SOCKS client status event so controllers
2987 can learn when a client application is leaking DNS addresses.
2988 - Implement BUG general status event so controllers can learn when
2989 Tor is unhappy about its internal invariants.
2990 - Implement CLOCK_SKEW general status event so controllers can learn
2991 when Tor thinks the system clock is set incorrectly.
2992 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
2993 server status events so controllers can learn when their descriptors
2994 are accepted by a directory.
2995 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
2996 server status events so controllers can learn about Tor's progress in
2997 deciding whether it's reachable from the outside.
2998 - Implement BAD_LIBEVENT general status event so controllers can learn
2999 when we have a version/method combination in libevent that needs to
3001 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
3002 and DNS_USELESS server status events so controllers can learn
3003 about changes to DNS server status.
3005 o Minor features (directory):
3006 - Authorities no longer recommend exits as guards if this would shift
3007 too much load to the exit nodes.
3010 Changes in version 0.1.2.5-alpha - 2007-01-06
3012 - Enable write limiting as well as read limiting. Now we sacrifice
3013 capacity if we're pushing out lots of directory traffic, rather
3014 than overrunning the user's intended bandwidth limits.
3015 - Include TLS overhead when counting bandwidth usage; previously, we
3016 would count only the bytes sent over TLS, but not the bytes used
3018 - Support running the Tor service with a torrc not in the same
3019 directory as tor.exe and default to using the torrc located in
3020 the %appdata%\Tor\ of the user who installed the service. Patch
3022 - Servers now check for the case when common DNS requests are going to
3023 wildcarded addresses (i.e. all getting the same answer), and change
3024 their exit policy to reject *:* if it's happening.
3025 - Implement BEGIN_DIR cells, so we can connect to the directory
3026 server via TLS to do encrypted directory requests rather than
3027 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
3028 config options if you like.
3030 o Minor features (config and docs):
3031 - Start using the state file to store bandwidth accounting data:
3032 the bw_accounting file is now obsolete. We'll keep generating it
3033 for a while for people who are still using 0.1.2.4-alpha.
3034 - Try to batch changes to the state file so that we do as few
3035 disk writes as possible while still storing important things in
3037 - The state file and the bw_accounting file get saved less often when
3038 the AvoidDiskWrites config option is set.
3039 - Make PIDFile work on Windows (untested).
3040 - Add internal descriptions for a bunch of configuration options:
3041 accessible via controller interface and in comments in saved
3043 - Reject *:563 (NNTPS) in the default exit policy. We already reject
3044 NNTP by default, so this seems like a sensible addition.
3045 - Clients now reject hostnames with invalid characters. This should
3046 avoid some inadvertent info leaks. Add an option
3047 AllowNonRFC953Hostnames to disable this behavior, in case somebody
3048 is running a private network with hosts called @, !, and #.
3049 - Add a maintainer script to tell us which options are missing
3050 documentation: "make check-docs".
3051 - Add a new address-spec.txt document to describe our special-case
3052 addresses: .exit, .onion, and .noconnnect.
3054 o Minor features (DNS):
3055 - Ongoing work on eventdns infrastructure: now it has dns server
3056 and ipv6 support. One day Tor will make use of it.
3057 - Add client-side caching for reverse DNS lookups.
3058 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
3059 - When we change nameservers or IP addresses, reset and re-launch
3060 our tests for DNS hijacking.
3062 o Minor features (directory):
3063 - Authorities now specify server versions in networkstatus. This adds
3064 about 2% to the size of compressed networkstatus docs, and allows
3065 clients to tell which servers support BEGIN_DIR and which don't.
3066 The implementation is forward-compatible with a proposed future
3067 protocol version scheme not tied to Tor versions.
3068 - DirServer configuration lines now have an orport= option so
3069 clients can open encrypted tunnels to the authorities without
3070 having downloaded their descriptors yet. Enabled for moria1,
3071 moria2, tor26, and lefkada now in the default configuration.
3072 - Directory servers are more willing to send a 503 "busy" if they
3073 are near their write limit, especially for v1 directory requests.
3074 Now they can use their limited bandwidth for actual Tor traffic.
3075 - Clients track responses with status 503 from dirservers. After a
3076 dirserver has given us a 503, we try not to use it until an hour has
3077 gone by, or until we have no dirservers that haven't given us a 503.
3078 - When we get a 503 from a directory, and we're not a server, we don't
3079 count the failure against the total number of failures allowed
3080 for the thing we're trying to download.
3081 - Report X-Your-Address-Is correctly from tunneled directory
3082 connections; don't report X-Your-Address-Is when it's an internal
3083 address; and never believe reported remote addresses when they're
3085 - Protect against an unlikely DoS attack on directory servers.
3086 - Add a BadDirectory flag to network status docs so that authorities
3087 can (eventually) tell clients about caches they believe to be
3090 o Minor features (controller):
3091 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
3092 - Reimplement GETINFO so that info/names stays in sync with the
3094 - Implement "GETINFO fingerprint".
3095 - Implement "SETEVENTS GUARD" so controllers can get updates on
3096 entry guard status as it changes.
3098 o Minor features (clean up obsolete pieces):
3099 - Remove some options that have been deprecated since at least
3100 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
3101 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
3103 - We no longer look for identity and onion keys in "identity.key" and
3104 "onion.key" -- these were replaced by secret_id_key and
3105 secret_onion_key in 0.0.8pre1.
3106 - We no longer require unrecognized directory entries to be
3109 o Major bugfixes (security):
3110 - Stop sending the HttpProxyAuthenticator string to directory
3111 servers when directory connections are tunnelled through Tor.
3112 - Clients no longer store bandwidth history in the state file.
3113 - Do not log introduction points for hidden services if SafeLogging
3115 - When generating bandwidth history, round down to the nearest
3116 1k. When storing accounting data, round up to the nearest 1k.
3117 - When we're running as a server, remember when we last rotated onion
3118 keys, so that we will rotate keys once they're a week old even if
3119 we never stay up for a week ourselves.
3121 o Major bugfixes (other):
3122 - Fix a longstanding bug in eventdns that prevented the count of
3123 timed-out resolves from ever being reset. This bug caused us to
3124 give up on a nameserver the third time it timed out, and try it
3125 10 seconds later... and to give up on it every time it timed out
3127 - Take out the '5 second' timeout from the connection retry
3128 schedule. Now the first connect attempt will wait a full 10
3129 seconds before switching to a new circuit. Perhaps this will help
3130 a lot. Based on observations from Mike Perry.
3131 - Fix a bug on the Windows implementation of tor_mmap_file() that
3132 would prevent the cached-routers file from ever loading. Reported
3136 - Fix an assert failure when a directory authority sets
3137 AuthDirRejectUnlisted and then receives a descriptor from an
3138 unlisted router. Reported by seeess.
3139 - Avoid a double-free when parsing malformed DirServer lines.
3140 - Fix a bug when a BSD-style PF socket is first used. Patch from
3142 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
3143 to resolve an address at a given exit node even when they ask for
3145 - Servers no longer ever list themselves in their "family" line,
3146 even if configured to do so. This makes it easier to configure
3147 family lists conveniently.
3148 - When running as a server, don't fall back to 127.0.0.1 when no
3149 nameservers are configured in /etc/resolv.conf; instead, make the
3150 user fix resolv.conf or specify nameservers explicitly. (Resolves
3152 - Stop accepting certain malformed ports in configured exit policies.
3153 - Don't re-write the fingerprint file every restart, unless it has
3155 - Stop warning when a single nameserver fails: only warn when _all_ of
3156 our nameservers have failed. Also, when we only have one nameserver,
3157 raise the threshold for deciding that the nameserver is dead.
3158 - Directory authorities now only decide that routers are reachable
3159 if their identity keys are as expected.
3160 - When the user uses bad syntax in the Log config line, stop
3161 suggesting other bad syntax as a replacement.
3162 - Correctly detect ipv6 DNS capability on OpenBSD.
3164 o Minor bugfixes (controller):
3165 - Report the circuit number correctly in STREAM CLOSED events. Bug
3166 reported by Mike Perry.
3167 - Do not report bizarre values for results of accounting GETINFOs
3168 when the last second's write or read exceeds the allotted bandwidth.
3169 - Report "unrecognized key" rather than an empty string when the
3170 controller tries to fetch a networkstatus that doesn't exist.
3173 Changes in version 0.1.1.26 - 2006-12-14
3174 o Security bugfixes:
3175 - Stop sending the HttpProxyAuthenticator string to directory
3176 servers when directory connections are tunnelled through Tor.
3177 - Clients no longer store bandwidth history in the state file.
3178 - Do not log introduction points for hidden services if SafeLogging
3182 - Fix an assert failure when a directory authority sets
3183 AuthDirRejectUnlisted and then receives a descriptor from an
3184 unlisted router (reported by seeess).
3187 Changes in version 0.1.2.4-alpha - 2006-12-03
3189 - Add support for using natd; this allows FreeBSDs earlier than
3190 5.1.2 to have ipfw send connections through Tor without using
3191 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
3194 - Make all connections to addresses of the form ".noconnect"
3195 immediately get closed. This lets application/controller combos
3196 successfully test whether they're talking to the same Tor by
3197 watching for STREAM events.
3198 - Make cross.sh cross-compilation script work even when autogen.sh
3199 hasn't been run. (Patch from Michael Mohr.)
3200 - Statistics dumped by -USR2 now include a breakdown of public key
3201 operations, for profiling.
3204 - Fix a major leak when directory authorities parse their
3205 approved-routers list, a minor memory leak when we fail to pick
3206 an exit node, and a few rare leaks on errors.
3207 - Handle TransPort connections even when the server sends data before
3208 the client sends data. Previously, the connection would just hang
3209 until the client sent data. (Patch from tup based on patch from
3211 - Avoid assert failure when our cached-routers file is empty on
3215 - Don't log spurious warnings when we see a circuit close reason we
3216 don't recognize; it's probably just from a newer version of Tor.
3217 - Have directory authorities allow larger amounts of drift in uptime
3218 without replacing the server descriptor: previously, a server that
3219 restarted every 30 minutes could have 48 "interesting" descriptors
3221 - Start linking to the Tor specification and Tor reference manual
3222 correctly in the Windows installer.
3223 - Add Vidalia to the OS X uninstaller script, so when we uninstall
3224 Tor/Privoxy we also uninstall Vidalia.
3225 - Resume building on Irix64, and fix a lot of warnings from its
3227 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
3228 when we're running as a client.
3231 Changes in version 0.1.1.25 - 2006-11-04
3233 - When a client asks us to resolve (rather than connect to)
3234 an address, and we have a cached answer, give them the cached
3235 answer. Previously, we would give them no answer at all.
3236 - We were building exactly the wrong circuits when we predict
3237 hidden service requirements, meaning Tor would have to build all
3238 its circuits on demand.
3239 - If none of our live entry guards have a high uptime, but we
3240 require a guard with a high uptime, try adding a new guard before
3241 we give up on the requirement. This patch should make long-lived
3242 connections more stable on average.
3243 - When testing reachability of our DirPort, don't launch new
3244 tests when there's already one in progress -- unreachable
3245 servers were stacking up dozens of testing streams.
3247 o Security bugfixes:
3248 - When the user sends a NEWNYM signal, clear the client-side DNS
3249 cache too. Otherwise we continue to act on previous information.
3252 - Avoid a memory corruption bug when creating a hash table for
3254 - Avoid possibility of controller-triggered crash when misusing
3255 certain commands from a v0 controller on platforms that do not
3256 handle printf("%s",NULL) gracefully.
3257 - Avoid infinite loop on unexpected controller input.
3258 - Don't log spurious warnings when we see a circuit close reason we
3259 don't recognize; it's probably just from a newer version of Tor.
3260 - Add Vidalia to the OS X uninstaller script, so when we uninstall
3261 Tor/Privoxy we also uninstall Vidalia.
3264 Changes in version 0.1.2.3-alpha - 2006-10-29
3266 - Prepare for servers to publish descriptors less often: never
3267 discard a descriptor simply for being too old until either it is
3268 recommended by no authorities, or until we get a better one for
3269 the same router. Make caches consider retaining old recommended
3270 routers for even longer.
3271 - If most authorities set a BadExit flag for a server, clients
3272 don't think of it as a general-purpose exit. Clients only consider
3273 authorities that advertise themselves as listing bad exits.
3274 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
3275 headers for content, so that we can work better in the presence of
3276 caching HTTP proxies.
3277 - Allow authorities to list nodes as bad exits by fingerprint or by
3280 o Minor features, controller:
3281 - Add a REASON field to CIRC events; for backward compatibility, this
3282 field is sent only to controllers that have enabled the extended
3283 event format. Also, add additional reason codes to explain why
3284 a given circuit has been destroyed or truncated. (Patches from
3286 - Add a REMOTE_REASON field to extended CIRC events to tell the
3287 controller about why a remote OR told us to close a circuit.
3288 - Stream events also now have REASON and REMOTE_REASON fields,
3289 working much like those for circuit events.
3290 - There's now a GETINFO ns/... field so that controllers can ask Tor
3291 about the current status of a router.
3292 - A new event type "NS" to inform a controller when our opinion of
3293 a router's status has changed.
3294 - Add a GETINFO events/names and GETINFO features/names so controllers
3295 can tell which events and features are supported.
3296 - A new CLEARDNSCACHE signal to allow controllers to clear the
3297 client-side DNS cache without expiring circuits.
3299 o Security bugfixes:
3300 - When the user sends a NEWNYM signal, clear the client-side DNS
3301 cache too. Otherwise we continue to act on previous information.
3304 - Avoid sending junk to controllers or segfaulting when a controller
3305 uses EVENT_NEW_DESC with verbose nicknames.
3306 - Stop triggering asserts if the controller tries to extend hidden
3307 service circuits (reported by mwenge).
3308 - Avoid infinite loop on unexpected controller input.
3309 - When the controller does a "GETINFO network-status", tell it
3310 about even those routers whose descriptors are very old, and use
3311 long nicknames where appropriate.
3312 - Change NT service functions to be loaded on demand. This lets us
3313 build with MinGW without breaking Tor for Windows 98 users.
3314 - Do DirPort reachability tests less often, since a single test
3315 chews through many circuits before giving up.
3316 - In the hidden service example in torrc.sample, stop recommending
3317 esoteric and discouraged hidden service options.
3318 - When stopping an NT service, wait up to 10 sec for it to actually
3319 stop. (Patch from Matt Edman; resolves bug 295.)
3320 - Fix handling of verbose nicknames with ORCONN controller events:
3321 make them show up exactly when requested, rather than exactly when
3323 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
3324 printing a duplicate "$" in the keys we send (reported by mwenge).
3325 - Correctly set maximum connection limit on Cygwin. (This time
3327 - Try to detect Windows correctly when cross-compiling.
3328 - Detect the size of the routers file correctly even if it is
3329 corrupted (on systems without mmap) or not page-aligned (on systems
3330 with mmap). This bug was harmless.
3331 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
3332 to open a stream fails; now we do in more cases. This should
3333 make clients able to find a good exit faster in some cases, since
3334 unhandleable requests will now get an error rather than timing out.
3335 - Resolve two memory leaks when rebuilding the on-disk router cache
3336 (reported by fookoowa).
3337 - Clean up minor code warnings suggested by the MIPSpro C compiler,
3338 and reported by some Centos users.
3339 - Controller signals now work on non-Unix platforms that don't define
3340 SIGUSR1 and SIGUSR2 the way we expect.
3341 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
3342 values before failing, and always enables eventdns.
3343 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
3344 Try to fix this in configure.in by checking for most functions
3345 before we check for libevent.
3348 Changes in version 0.1.2.2-alpha - 2006-10-07
3350 - Make our async eventdns library on-by-default for Tor servers,
3351 and plan to deprecate the separate dnsworker threads.
3352 - Add server-side support for "reverse" DNS lookups (using PTR
3353 records so clients can determine the canonical hostname for a given
3354 IPv4 address). Only supported by servers using eventdns; servers
3355 now announce in their descriptors whether they support eventdns.
3356 - Specify and implement client-side SOCKS5 interface for reverse DNS
3357 lookups (see doc/socks-extensions.txt).
3358 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
3359 connect to directory servers through Tor. Previously, clients needed
3360 to find Tor exits to make private connections to directory servers.
3361 - Avoid choosing Exit nodes for entry or middle hops when the
3362 total bandwidth available from non-Exit nodes is much higher than
3363 the total bandwidth available from Exit nodes.
3364 - Workaround for name servers (like Earthlink's) that hijack failing
3365 DNS requests and replace the no-such-server answer with a "helpful"
3366 redirect to an advertising-driven search portal. Also work around
3367 DNS hijackers who "helpfully" decline to hijack known-invalid
3368 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
3369 lets you turn it off.
3370 - Send out a burst of long-range padding cells once we've established
3371 that we're reachable. Spread them over 4 circuits, so hopefully
3372 a few will be fast. This exercises our bandwidth and bootstraps
3373 us into the directory more quickly.
3375 o New/improved config options:
3376 - Add new config option "ResolvConf" to let the server operator
3377 choose an alternate resolve.conf file when using eventdns.
3378 - Add an "EnforceDistinctSubnets" option to control our "exclude
3379 servers on the same /16" behavior. It's still on by default; this
3380 is mostly for people who want to operate private test networks with
3381 all the machines on the same subnet.
3382 - If one of our entry guards is on the ExcludeNodes list, or the
3383 directory authorities don't think it's a good guard, treat it as
3384 if it were unlisted: stop using it as a guard, and throw it off
3385 the guards list if it stays that way for a long time.
3386 - Allow directory authorities to be marked separately as authorities
3387 for the v1 directory protocol, the v2 directory protocol, and
3388 as hidden service directories, to make it easier to retire old
3389 authorities. V1 authorities should set "HSAuthoritativeDir 1"
3390 to continue being hidden service authorities too.
3391 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
3393 o Minor features, controller:
3394 - Fix CIRC controller events so that controllers can learn the
3395 identity digests of non-Named servers used in circuit paths.
3396 - Let controllers ask for more useful identifiers for servers. Instead
3397 of learning identity digests for un-Named servers and nicknames
3398 for Named servers, the new identifiers include digest, nickname,
3399 and indication of Named status. Off by default; see control-spec.txt
3400 for more information.
3401 - Add a "getinfo address" controller command so it can display Tor's
3402 best guess to the user.
3403 - New controller event to alert the controller when our server
3404 descriptor has changed.
3405 - Give more meaningful errors on controller authentication failure.
3407 o Minor features, other:
3408 - When asked to resolve a hostname, don't use non-exit servers unless
3409 requested to do so. This allows servers with broken DNS to be
3410 useful to the network.
3411 - Divide eventdns log messages into warn and info messages.
3412 - Reserve the nickname "Unnamed" for routers that can't pick
3413 a hostname: any router can call itself Unnamed; directory
3414 authorities will never allocate Unnamed to any particular router;
3415 clients won't believe that any router is the canonical Unnamed.
3416 - Only include function names in log messages for info/debug messages.
3417 For notice/warn/err, the content of the message should be clear on
3418 its own, and printing the function name only confuses users.
3419 - Avoid some false positives during reachability testing: don't try
3420 to test via a server that's on the same /24 as us.
3421 - If we fail to build a circuit to an intended enclave, and it's
3422 not mandatory that we use that enclave, stop wanting it.
3423 - When eventdns is enabled, allow multithreaded builds on NetBSD and
3424 OpenBSD. (We had previously disabled threads on these platforms
3425 because they didn't have working thread-safe resolver functions.)
3427 o Major bugfixes, anonymity/security:
3428 - If a client asked for a server by name, and there's a named server
3429 in our network-status but we don't have its descriptor yet, we
3430 could return an unnamed server instead.
3431 - Fix NetBSD bug that could allow someone to force uninitialized RAM
3432 to be sent to a server's DNS resolver. This only affects NetBSD
3433 and other platforms that do not bounds-check tolower().
3434 - Reject (most) attempts to use Tor circuits with length one. (If
3435 many people start using Tor as a one-hop proxy, exit nodes become
3436 a more attractive target for compromise.)
3437 - Just because your DirPort is open doesn't mean people should be
3438 able to remotely teach you about hidden service descriptors. Now
3439 only accept rendezvous posts if you've got HSAuthoritativeDir set.
3441 o Major bugfixes, other:
3442 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
3443 - When a client asks the server to resolve (not connect to)
3444 an address, and it has a cached answer, give them the cached answer.
3445 Previously, the server would give them no answer at all.
3446 - Allow really slow clients to not hang up five minutes into their
3447 directory downloads (suggested by Adam J. Richter).
3448 - We were building exactly the wrong circuits when we anticipated
3449 hidden service requirements, meaning Tor would have to build all
3450 its circuits on demand.
3451 - Avoid crashing when we mmap a router cache file of size 0.
3452 - When testing reachability of our DirPort, don't launch new
3453 tests when there's already one in progress -- unreachable
3454 servers were stacking up dozens of testing streams.
3456 o Minor bugfixes, correctness:
3457 - If we're a directory mirror and we ask for "all" network status
3458 documents, we would discard status documents from authorities
3460 - Avoid a memory corruption bug when creating a hash table for
3462 - Avoid controller-triggered crash when misusing certain commands
3463 from a v0 controller on platforms that do not handle
3464 printf("%s",NULL) gracefully.
3465 - Don't crash when a controller sends a third argument to an
3466 "extendcircuit" request.
3467 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
3468 response; fix error code when "getinfo dir/status/" fails.
3469 - Avoid crash when telling controller stream-status and a stream
3471 - Patch from Adam Langley to fix assert() in eventdns.c.
3472 - Fix a debug log message in eventdns to say "X resolved to Y"
3473 instead of "X resolved to X".
3474 - Make eventdns give strings for DNS errors, not just error numbers.
3475 - Track unreachable entry guards correctly: don't conflate
3476 'unreachable by us right now' with 'listed as down by the directory
3477 authorities'. With the old code, if a guard was unreachable by
3478 us but listed as running, it would clog our guard list forever.
3479 - Behave correctly in case we ever have a network with more than
3480 2GB/s total advertised capacity.
3481 - Make TrackExitHosts case-insensitive, and fix the behavior of
3482 ".suffix" TrackExitHosts items to avoid matching in the middle of
3484 - Finally fix the openssl warnings from newer gccs that believe that
3485 ignoring a return value is okay, but casting a return value and
3486 then ignoring it is a sign of madness.
3487 - Prevent the contrib/exitlist script from printing the same
3488 result more than once.
3489 - Patch from Steve Hildrey: Generate network status correctly on
3490 non-versioning dirservers.
3491 - Don't listen to the X-Your-Address-Is hint if you did the lookup
3492 via Tor; otherwise you'll think you're the exit node's IP address.
3494 o Minor bugfixes, performance:
3495 - Two small performance improvements on parsing descriptors.
3496 - Major performance improvement on inserting descriptors: change
3497 algorithm from O(n^2) to O(n).
3498 - Make the common memory allocation path faster on machines where
3499 malloc(0) returns a pointer.
3500 - Start remembering X-Your-Address-Is directory hints even if you're
3501 a client, so you can become a server more smoothly.
3502 - Avoid duplicate entries on MyFamily line in server descriptor.
3504 o Packaging, features:
3505 - Remove architecture from OS X builds. The official builds are
3506 now universal binaries.
3507 - The Debian package now uses --verify-config when (re)starting,
3508 to distinguish configuration errors from other errors.
3509 - Update RPMs to require libevent 1.1b.
3511 o Packaging, bugfixes:
3512 - Patches so Tor builds with MinGW on Windows.
3513 - Patches so Tor might run on Cygwin again.
3514 - Resume building on non-gcc compilers and ancient gcc. Resume
3515 building with the -O0 compile flag. Resume building cleanly on
3517 - Run correctly on OS X platforms with case-sensitive filesystems.
3518 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
3519 - Add autoconf checks so Tor can build on Solaris x86 again.
3522 - Documented (and renamed) ServerDNSSearchDomains and
3523 ServerDNSResolvConfFile options.
3524 - Be clearer that the *ListenAddress directives can be repeated
3528 Changes in version 0.1.1.24 - 2006-09-29
3530 - Allow really slow clients to not hang up five minutes into their
3531 directory downloads (suggested by Adam J. Richter).
3532 - Fix major performance regression from 0.1.0.x: instead of checking
3533 whether we have enough directory information every time we want to
3534 do something, only check when the directory information has changed.
3535 This should improve client CPU usage by 25-50%.
3536 - Don't crash if, after a server has been running for a while,
3537 it can't resolve its hostname.
3540 - Allow Tor to start when RunAsDaemon is set but no logs are set.
3541 - Don't crash when the controller receives a third argument to an
3542 "extendcircuit" request.
3543 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
3544 response; fix error code when "getinfo dir/status/" fails.
3545 - Fix configure.in to not produce broken configure files with
3546 more recent versions of autoconf. Thanks to Clint for his auto*
3548 - Fix security bug on NetBSD that could allow someone to force
3549 uninitialized RAM to be sent to a server's DNS resolver. This
3550 only affects NetBSD and other platforms that do not bounds-check
3552 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
3553 methods: these are known to be buggy.
3554 - If we're a directory mirror and we ask for "all" network status
3555 documents, we would discard status documents from authorities
3559 Changes in version 0.1.2.1-alpha - 2006-08-27
3561 - Add "eventdns" async dns library from Adam Langley, tweaked to
3562 build on OSX and Windows. Only enabled if you pass the
3563 --enable-eventdns argument to configure.
3564 - Allow servers with no hostname or IP address to learn their
3565 IP address by asking the directory authorities. This code only
3566 kicks in when you would normally have exited with a "no address"
3567 error. Nothing's authenticated, so use with care.
3568 - Rather than waiting a fixed amount of time between retrying
3569 application connections, we wait only 5 seconds for the first,
3570 10 seconds for the second, and 15 seconds for each retry after
3571 that. Hopefully this will improve the expected user experience.
3572 - Patch from Tup to add support for transparent AP connections:
3573 this basically bundles the functionality of trans-proxy-tor
3574 into the Tor mainline. Now hosts with compliant pf/netfilter
3575 implementations can redirect TCP connections straight to Tor
3576 without diverting through SOCKS. Needs docs.
3577 - Busy directory servers save lots of memory by spooling server
3578 descriptors, v1 directories, and v2 networkstatus docs to buffers
3579 as needed rather than en masse. Also mmap the cached-routers
3580 files, so we don't need to keep the whole thing in memory too.
3581 - Automatically avoid picking more than one node from the same
3582 /16 network when constructing a circuit.
3583 - Revise and clean up the torrc.sample that we ship with; add
3584 a section for BandwidthRate and BandwidthBurst.
3587 - Split circuit_t into origin_circuit_t and or_circuit_t, and
3588 split connection_t into edge, or, dir, control, and base structs.
3589 These will save quite a bit of memory on busy servers, and they'll
3590 also help us track down bugs in the code and bugs in the spec.
3591 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
3592 or later. Log when we are doing this, so we can diagnose it when
3593 it fails. (Also, recommend libevent 1.1b for kqueue and
3594 win32 methods; deprecate libevent 1.0b harder; make libevent
3595 recommendation system saner.)
3596 - Start being able to build universal binaries on OS X (thanks
3598 - Export the default exit policy via the control port, so controllers
3599 don't need to guess what it is / will be later.
3600 - Add a man page entry for ProtocolWarnings.
3601 - Add TestVia config option to the man page.
3602 - Remove even more protocol-related warnings from Tor server logs,
3603 such as bad TLS handshakes and malformed begin cells.
3604 - Stop fetching descriptors if you're not a dir mirror and you
3605 haven't tried to establish any circuits lately. [This currently
3606 causes some dangerous behavior, because when you start up again
3607 you'll use your ancient server descriptors.]
3608 - New DirPort behavior: if you have your dirport set, you download
3609 descriptors aggressively like a directory mirror, whether or not
3611 - Get rid of the router_retry_connections notion. Now routers
3612 no longer try to rebuild long-term connections to directory
3613 authorities, and directory authorities no longer try to rebuild
3614 long-term connections to all servers. We still don't hang up
3615 connections in these two cases though -- we need to look at it
3616 more carefully to avoid flapping, and we likely need to wait til
3617 0.1.1.x is obsolete.
3618 - Drop compatibility with obsolete Tors that permit create cells
3619 to have the wrong circ_id_type.
3620 - Re-enable per-connection rate limiting. Get rid of the "OP
3621 bandwidth" concept. Lay groundwork for "bandwidth classes" --
3622 separate global buckets that apply depending on what sort of conn
3624 - Start publishing one minute or so after we find our ORPort
3625 to be reachable. This will help reduce the number of descriptors
3626 we have for ourselves floating around, since it's quite likely
3627 other things (e.g. DirPort) will change during that minute too.
3628 - Fork the v1 directory protocol into its own spec document,
3629 and mark dir-spec.txt as the currently correct (v2) spec.
3632 - When we find our DirPort to be reachable, publish a new descriptor
3633 so we'll tell the world (reported by pnx).
3634 - Publish a new descriptor after we hup/reload. This is important
3635 if our config has changed such that we'll want to start advertising
3636 our DirPort now, etc.
3637 - Allow Tor to start when RunAsDaemon is set but no logs are set.
3638 - When we have a state file we cannot parse, tell the user and
3639 move it aside. Now we avoid situations where the user starts
3640 Tor in 1904, Tor writes a state file with that timestamp in it,
3641 the user fixes her clock, and Tor refuses to start.
3642 - Fix configure.in to not produce broken configure files with
3643 more recent versions of autoconf. Thanks to Clint for his auto*
3645 - "tor --verify-config" now exits with -1(255) or 0 depending on
3646 whether the config options are bad or good.
3647 - Resolve bug 321 when using dnsworkers: append a period to every
3648 address we resolve at the exit node, so that we do not accidentally
3649 pick up local addresses, and so that failing searches are retried
3650 in the resolver search domains. (This is already solved for
3651 eventdns.) (This breaks Blossom servers for now.)
3652 - If we are using an exit enclave and we can't connect, e.g. because
3653 its webserver is misconfigured to not listen on localhost, then
3654 back off and try connecting from somewhere else before we fail.
3657 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
3658 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
3659 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
3660 when the IP address is mapped through MapAddress to a hostname.
3661 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
3662 useless IPv6 DNS resolves.
3663 - Patch suggested by Karsten Loesing: respond to SIGNAL command
3664 before we execute the signal, in case the signal shuts us down.
3665 - Clean up AllowInvalidNodes man page entry.
3666 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
3667 - Add more asserts to track down an assert error on a windows Tor
3668 server with connection_add being called with socket == -1.
3669 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
3670 - Fix misleading log messages: an entry guard that is "unlisted",
3671 as well as not known to be "down" (because we've never heard
3672 of it), is not therefore "up".
3673 - Remove code to special-case "-cvs" ending, since it has not
3674 actually mattered since 0.0.9.
3675 - Make our socks5 handling more robust to broken socks clients:
3676 throw out everything waiting on the buffer in between socks
3677 handshake phases, since they can't possibly (so the theory
3678 goes) have predicted what we plan to respond to them.
3681 Changes in version 0.1.1.23 - 2006-07-30
3683 - Fast Tor servers, especially exit nodes, were triggering asserts
3684 due to a bug in handling the list of pending DNS resolves. Some
3685 bugs still remain here; we're hunting them.
3686 - Entry guards could crash clients by sending unexpected input.
3687 - More fixes on reachability testing: if you find yourself reachable,
3688 then don't ever make any client requests (so you stop predicting
3689 circuits), then hup or have your clock jump, then later your IP
3690 changes, you won't think circuits are working, so you won't try to
3691 test reachability, so you won't publish.
3694 - Avoid a crash if the controller does a resetconf firewallports
3695 and then a setconf fascistfirewall=1.
3696 - Avoid an integer underflow when the dir authority decides whether
3697 a router is stable: we might wrongly label it stable, and compute
3698 a slightly wrong median stability, when a descriptor is published
3700 - Fix a place where we might trigger an assert if we can't build our
3701 own server descriptor yet.
3704 Changes in version 0.1.1.22 - 2006-07-05
3706 - Fix a big bug that was causing servers to not find themselves
3707 reachable if they changed IP addresses. Since only 0.1.1.22+
3708 servers can do reachability testing correctly, now we automatically
3709 make sure to test via one of these.
3710 - Fix to allow clients and mirrors to learn directory info from
3711 descriptor downloads that get cut off partway through.
3712 - Directory authorities had a bug in deciding if a newly published
3713 descriptor was novel enough to make everybody want a copy -- a few
3714 servers seem to be publishing new descriptors many times a minute.
3716 - Fix a rare bug that was causing some servers to complain about
3717 "closing wedged cpuworkers" and skip some circuit create requests.
3718 - Make the Exit flag in directory status documents actually work.
3721 Changes in version 0.1.1.21 - 2006-06-10
3722 o Crash and assert fixes from 0.1.1.20:
3723 - Fix a rare crash on Tor servers that have enabled hibernation.
3724 - Fix a seg fault on startup for Tor networks that use only one
3725 directory authority.
3726 - Fix an assert from a race condition that occurs on Tor servers
3727 while exiting, where various threads are trying to log that they're
3728 exiting, and delete the logs, at the same time.
3729 - Make our unit tests pass again on certain obscure platforms.
3732 - Add support for building SUSE RPM packages.
3733 - Speed up initial bootstrapping for clients: if we are making our
3734 first ever connection to any entry guard, then don't mark it down
3736 - When only one Tor server in the network is labelled as a guard,
3737 and we've already picked him, we would cycle endlessly picking him
3738 again, being unhappy about it, etc. Now we specifically exclude
3739 current guards when picking a new guard.
3740 - Servers send create cells more reliably after the TLS connection
3741 is established: we were sometimes forgetting to send half of them
3742 when we had more than one pending.
3743 - If we get a create cell that asks us to extend somewhere, but the
3744 Tor server there doesn't match the expected digest, we now send
3745 a destroy cell back, rather than silently doing nothing.
3746 - Make options->RedirectExit work again.
3747 - Make cookie authentication for the controller work again.
3748 - Stop being picky about unusual characters in the arguments to
3749 mapaddress. It's none of our business.
3750 - Add a new config option "TestVia" that lets you specify preferred
3751 middle hops to use for test circuits. Perhaps this will let me
3752 debug the reachability problems better.
3754 o Log / documentation fixes:
3755 - If we're a server and some peer has a broken TLS certificate, don't
3756 log about it unless ProtocolWarnings is set, i.e., we want to hear
3757 about protocol violations by others.
3758 - Fix spelling of VirtualAddrNetwork in man page.
3759 - Add a better explanation at the top of the autogenerated torrc file
3760 about what happened to our old torrc.
3763 Changes in version 0.1.1.20 - 2006-05-23
3765 - Downgrade a log severity where servers complain that they're
3767 - Avoid a compile warning on FreeBSD.
3768 - Remove string size limit on NEWDESC messages; solve bug 291.
3769 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
3770 more thoroughly when we're running on windows.
3773 Changes in version 0.1.1.19-rc - 2006-05-03
3775 - Regenerate our local descriptor if it's dirty and we try to use
3776 it locally (e.g. if it changes during reachability detection).
3777 - If we setconf our ORPort to 0, we continued to listen on the
3778 old ORPort and receive connections.
3779 - Avoid a second warning about machine/limits.h on Debian
3781 - Be willing to add our own routerinfo into the routerlist.
3782 Now authorities will include themselves in their directories
3783 and network-statuses.
3784 - Stop trying to upload rendezvous descriptors to every
3785 directory authority: only try the v1 authorities.
3786 - Servers no longer complain when they think they're not
3787 registered with the directory authorities. There were too many
3789 - Backport dist-rpm changes so rpms can be built without errors.
3792 - Implement an option, VirtualAddrMask, to set which addresses
3793 get handed out in response to mapaddress requests. This works
3794 around a bug in tsocks where 127.0.0.0/8 is never socksified.
3797 Changes in version 0.1.1.18-rc - 2006-04-10
3799 - Work harder to download live network-statuses from all the
3800 directory authorities we know about. Improve the threshold
3801 decision logic so we're more robust to edge cases.
3802 - When fetching rendezvous descriptors, we were willing to ask
3803 v2 authorities too, which would always return 404.
3806 - Stop listing down or invalid nodes in the v1 directory. This will
3807 reduce its bulk by about 1/3, and reduce load on directory
3809 - When deciding whether a router is Fast or Guard-worthy, consider
3810 his advertised BandwidthRate and not just the BandwidthCapacity.
3811 - No longer ship INSTALL and README files -- they are useless now.
3812 - Force rpmbuild to behave and honor target_cpu.
3813 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
3814 - Start to include translated versions of the tor-doc-*.html
3815 files, along with the screenshots. Still needs more work.
3816 - Start sending back 512 and 451 errors if mapaddress fails,
3817 rather than not sending anything back at all.
3818 - When we fail to bind or listen on an incoming or outgoing
3819 socket, we should close it before failing. otherwise we just
3820 leak it. (thanks to weasel for finding.)
3821 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
3822 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
3823 - Make NoPublish (even though deprecated) work again.
3824 - Fix a minor security flaw where a versioning auth dirserver
3825 could list a recommended version many times in a row to make
3826 clients more convinced that it's recommended.
3827 - Fix crash bug if there are two unregistered servers running
3828 with the same nickname, one of them is down, and you ask for
3829 them by nickname in your EntryNodes or ExitNodes. Also, try
3830 to pick the one that's running rather than an arbitrary one.
3831 - Fix an infinite loop we could hit if we go offline for too long.
3832 - Complain when we hit WSAENOBUFS on recv() or write() too.
3833 Perhaps this will help us hunt the bug.
3834 - If you're not a versioning dirserver, don't put the string
3835 "client-versions \nserver-versions \n" in your network-status.
3836 - Lower the minimum required number of file descriptors to 1000,
3837 so we can have some overhead for Valgrind on Linux, where the
3838 default ulimit -n is 1024.
3841 - Add tor.dizum.com as the fifth authoritative directory server.
3842 - Add a new config option FetchUselessDescriptors, off by default,
3843 for when you plan to run "exitlist" on your client and you want
3844 to know about even the non-running descriptors.
3847 Changes in version 0.1.1.17-rc - 2006-03-28
3849 - Clients and servers since 0.1.1.10-alpha have been expiring
3850 connections whenever they are idle for 5 minutes and they *do*
3851 have circuits on them. Oops. With this new version, clients will
3852 discard their previous entry guard choices and avoid choosing
3853 entry guards running these flawed versions.
3854 - Fix memory leak when uncompressing concatenated zlib streams. This
3855 was causing substantial leaks over time on Tor servers.
3856 - The v1 directory was including servers as much as 48 hours old,
3857 because that's how the new routerlist->routers works. Now only
3858 include them if they're 20 hours old or less.
3861 - Resume building on irix64, netbsd 2.0, etc.
3862 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
3864 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
3865 and it is confusing some users.
3866 - Mirrors stop caching the v1 directory so often.
3867 - Make the max number of old descriptors that a cache will hold
3868 rise with the number of directory authorities, so we can scale.
3869 - Change our win32 uname() hack to be more forgiving about what
3870 win32 versions it thinks it's found.
3873 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
3875 - When the controller's *setconf commands fail, collect an error
3876 message in a string and hand it back to the controller.
3877 - Make the v2 dir's "Fast" flag based on relative capacity, just
3878 like "Stable" is based on median uptime. Name everything in the
3879 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
3880 - Log server fingerprint on startup, so new server operators don't
3881 have to go hunting around their filesystem for it.
3882 - Return a robots.txt on our dirport to discourage google indexing.
3883 - Let the controller ask for GETINFO dir/status/foo so it can ask
3884 directly rather than connecting to the dir port. Only works when
3885 dirport is set for now.
3887 o New config options rather than constants in the code:
3888 - SocksTimeout: How long do we let a socks connection wait
3889 unattached before we fail it?
3890 - CircuitBuildTimeout: Cull non-open circuits that were born
3891 at least this many seconds ago.
3892 - CircuitIdleTimeout: Cull open clean circuits that were born
3893 at least this many seconds ago.
3896 Changes in version 0.1.1.16-rc - 2006-03-18
3897 o Bugfixes on 0.1.1.15-rc:
3898 - Fix assert when the controller asks to attachstream a connect-wait
3899 or resolve-wait stream.
3900 - Now do address rewriting when the controller asks us to attach
3901 to a particular circuit too. This will let Blossom specify
3902 "moria2.exit" without having to learn what moria2's IP address is.
3903 - Make the "tor --verify-config" command-line work again, so people
3904 can automatically check if their torrc will parse.
3905 - Authoritative dirservers no longer require an open connection from
3906 a server to consider him "reachable". We need this change because
3907 when we add new auth dirservers, old servers won't know not to
3909 - Let Tor build on Sun CC again.
3910 - Fix an off-by-one buffer size in dirserv.c that magically never
3911 hit our three authorities but broke sjmurdoch's own tor network.
3912 - If we as a directory mirror don't know of any v1 directory
3913 authorities, then don't try to cache any v1 directories.
3914 - Stop warning about unknown servers in our family when they are
3915 given as hex digests.
3916 - Stop complaining as quickly to the server operator that he
3917 hasn't registered his nickname/key binding.
3918 - Various cleanups so we can add new V2 Auth Dirservers.
3919 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
3920 reflect the updated flags in our v2 dir protocol.
3921 - Resume allowing non-printable characters for exit streams (both
3922 for connecting and for resolving). Now we tolerate applications
3923 that don't follow the RFCs. But continue to block malformed names
3926 o Bugfixes on 0.1.0.x:
3927 - Fix assert bug in close_logs(): when we close and delete logs,
3928 remove them all from the global "logfiles" list.
3929 - Fix minor integer overflow in calculating when we expect to use up
3930 our bandwidth allocation before hibernating.
3931 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
3932 there are multiple SSLs installed with different versions.
3933 - When we try to be a server and Address is not explicitly set and
3934 our hostname resolves to a private IP address, try to use an
3935 interface address if it has a public address. Now Windows machines
3936 that think of themselves as localhost can work by default.
3939 - Let the controller ask for GETINFO dir/server/foo so it can ask
3940 directly rather than connecting to the dir port.
3941 - Let the controller tell us about certain router descriptors
3942 that it doesn't want Tor to use in circuits. Implement
3943 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
3944 - New config option SafeSocks to reject all application connections
3945 using unsafe socks protocols. Defaults to off.
3948 Changes in version 0.1.1.15-rc - 2006-03-11
3949 o Bugfixes and cleanups:
3950 - When we're printing strings from the network, don't try to print
3951 non-printable characters. This protects us against shell escape
3952 sequence exploits, and also against attacks to fool humans into
3953 misreading their logs.
3954 - Fix a bug where Tor would fail to establish any connections if you
3955 left it off for 24 hours and then started it: we were happy with
3956 the obsolete network statuses, but they all referred to router
3957 descriptors that were too old to fetch, so we ended up with no
3958 valid router descriptors.
3959 - Fix a seg fault in the controller's "getinfo orconn-status"
3960 command while listing status on incoming handshaking connections.
3961 Introduce a status name "NEW" for these connections.
3962 - If we get a linelist or linelist_s config option from the torrc
3963 (e.g. ExitPolicy) and it has no value, warn and skip rather than
3964 silently resetting it to its default.
3965 - Don't abandon entry guards until they've been down or gone for
3967 - Cleaner and quieter log messages.
3970 - New controller signal NEWNYM that makes new application requests
3972 - Add a new circuit purpose 'controller' to let the controller ask
3973 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
3974 controller command to let you specify the purpose if you're
3975 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
3976 command to let you change a circuit's purpose after it's been
3978 - Accept "private:*" in routerdesc exit policies; not generated yet
3979 because older Tors do not understand it.
3980 - Add BSD-style contributed startup script "rc.subr" from Peter
3984 Changes in version 0.1.1.14-alpha - 2006-02-20
3985 o Bugfixes on 0.1.1.x:
3986 - Don't die if we ask for a stdout or stderr log (even implicitly)
3987 and we're set to RunAsDaemon -- just warn.
3988 - We still had a few bugs in the OR connection rotation code that
3989 caused directory servers to slowly aggregate connections to other
3990 fast Tor servers. This time for sure!
3991 - Make log entries on Win32 include the name of the function again.
3992 - We were treating a pair of exit policies if they were equal even
3993 if one said accept and the other said reject -- causing us to
3994 not always publish a new descriptor since we thought nothing
3996 - Retry pending server downloads as well as pending networkstatus
3997 downloads when we unexpectedly get a socks request.
3998 - We were ignoring the IS_FAST flag in the directory status,
3999 meaning we were willing to pick trivial-bandwidth nodes for "fast"
4001 - If the controller's SAVECONF command fails (e.g. due to file
4002 permissions), let the controller know that it failed.
4005 - If we're trying to be a Tor server and running Windows 95/98/ME
4006 as a server, explain that we'll likely crash.
4007 - When we're a server, a client asks for an old-style directory,
4008 and our write bucket is empty, don't give it to him. This way
4009 small servers can continue to serve the directory *sometimes*,
4010 without getting overloaded.
4011 - Compress exit policies even more -- look for duplicate lines
4013 - Clients now honor the "guard" flag in the router status when
4014 picking entry guards, rather than looking at is_fast or is_stable.
4015 - Retain unrecognized lines in $DATADIR/state file, so that we can
4016 be forward-compatible.
4017 - Generate 18.0.0.0/8 address policy format in descs when we can;
4018 warn when the mask is not reducible to a bit-prefix.
4019 - Let the user set ControlListenAddress in the torrc. This can be
4020 dangerous, but there are some cases (like a secured LAN) where it
4022 - Split ReachableAddresses into ReachableDirAddresses and
4023 ReachableORAddresses, so we can restrict Dir conns to port 80
4024 and OR conns to port 443.
4025 - Now we can target arch and OS in rpm builds (contributed by
4026 Phobos). Also make the resulting dist-rpm filename match the
4028 - New config options to help controllers: FetchServerDescriptors
4029 and FetchHidServDescriptors for whether to fetch server
4030 info and hidserv info or let the controller do it, and
4031 PublishServerDescriptor and PublishHidServDescriptors.
4032 - Also let the controller set the __AllDirActionsPrivate config
4033 option if you want all directory fetches/publishes to happen via
4034 Tor (it assumes your controller bootstraps your circuits).
4037 Changes in version 0.1.0.17 - 2006-02-17
4038 o Crash bugfixes on 0.1.0.x:
4039 - When servers with a non-zero DirPort came out of hibernation,
4040 sometimes they would trigger an assert.
4042 o Other important bugfixes:
4043 - On platforms that don't have getrlimit (like Windows), we were
4044 artificially constraining ourselves to a max of 1024
4045 connections. Now just assume that we can handle as many as 15000
4046 connections. Hopefully this won't cause other problems.
4048 o Backported features:
4049 - When we're a server, a client asks for an old-style directory,
4050 and our write bucket is empty, don't give it to him. This way
4051 small servers can continue to serve the directory *sometimes*,
4052 without getting overloaded.
4053 - Whenever you get a 503 in response to a directory fetch, try
4054 once more. This will become important once servers start sending
4055 503's whenever they feel busy.
4056 - Fetch a new directory every 120 minutes, not every 40 minutes.
4057 Now that we have hundreds of thousands of users running the old
4058 directory algorithm, it's starting to hurt a lot.
4059 - Bump up the period for forcing a hidden service descriptor upload
4060 from 20 minutes to 1 hour.
4063 Changes in version 0.1.1.13-alpha - 2006-02-09
4064 o Crashes in 0.1.1.x:
4065 - When you tried to setconf ORPort via the controller, Tor would
4066 crash. So people using TorCP to become a server were sad.
4067 - Solve (I hope) the stack-smashing bug that we were seeing on fast
4068 servers. The problem appears to be something do with OpenSSL's
4069 random number generation, or how we call it, or something. Let me
4070 know if the crashes continue.
4071 - Turn crypto hardware acceleration off by default, until we find
4072 somebody smart who can test it for us. (It appears to produce
4073 seg faults in at least some cases.)
4074 - Fix a rare assert error when we've tried all intro points for
4075 a hidden service and we try fetching the service descriptor again:
4076 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
4079 - Fix a major load balance bug: we were round-robining in 16 KB
4080 chunks, and servers with bandwidthrate of 20 KB, while downloading
4081 a 600 KB directory, would starve their other connections. Now we
4082 try to be a bit more fair.
4083 - Dir authorities and mirrors were never expiring the newest
4084 descriptor for each server, causing memory and directory bloat.
4085 - Fix memory-bloating and connection-bloating bug on servers: We
4086 were never closing any connection that had ever had a circuit on
4087 it, because we were checking conn->n_circuits == 0, yet we had a
4088 bug that let it go negative.
4089 - Make Tor work using squid as your http proxy again -- squid
4090 returns an error if you ask for a URL that's too long, and it uses
4091 a really generic error message. Plus, many people are behind a
4092 transparent squid so they don't even realize it.
4093 - On platforms that don't have getrlimit (like Windows), we were
4094 artificially constraining ourselves to a max of 1024
4095 connections. Now just assume that we can handle as many as 15000
4096 connections. Hopefully this won't cause other problems.
4097 - Add a new config option ExitPolicyRejectPrivate which defaults to
4098 1. This means all exit policies will begin with rejecting private
4099 addresses, unless the server operator explicitly turns it off.
4102 - Clients no longer download descriptors for non-running
4104 - Before we add new directory authorities, we should make it
4105 clear that only v1 authorities should receive/publish hidden
4106 service descriptors.
4109 - As soon as we've fetched some more directory info, immediately
4110 try to download more server descriptors. This way we don't have
4111 a 10 second pause during initial bootstrapping.
4112 - Remove even more loud log messages that the server operator can't
4114 - When we're running an obsolete or un-recommended version, make
4115 the log message more clear about what the problem is and what
4116 versions *are* still recommended.
4117 - Provide a more useful warn message when our onion queue gets full:
4118 the CPU is too slow or the exit policy is too liberal.
4119 - Don't warn when we receive a 503 from a dirserver/cache -- this
4120 will pave the way for them being able to refuse if they're busy.
4121 - When we fail to bind a listener, try to provide a more useful
4122 log message: e.g., "Is Tor already running?"
4123 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
4124 Goldberg can prove things about our handshake protocol more
4126 - MaxConn has been obsolete for a while now. Document the ConnLimit
4127 config option, which is a *minimum* number of file descriptors
4128 that must be available else Tor refuses to start.
4129 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
4130 if you log to syslog and want something other than LOG_DAEMON.
4131 - Make dirservers generate a separate "guard" flag to mean,
4132 "would make a good entry guard". Make clients parse it and vote
4133 on it. Not used by clients yet.
4134 - Implement --with-libevent-dir option to ./configure. Also, improve
4135 search techniques to find libevent, and use those for openssl too.
4136 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
4137 - Only start testing reachability once we've established a
4138 circuit. This will make startup on dirservers less noisy.
4139 - Don't try to upload hidden service descriptors until we have
4140 established a circuit.
4141 - Fix the controller's "attachstream 0" command to treat conn like
4142 it just connected, doing address remapping, handling .exit and
4143 .onion idioms, and so on. Now we're more uniform in making sure
4144 that the controller hears about new and closing connections.
4147 Changes in version 0.1.1.12-alpha - 2006-01-11
4148 o Bugfixes on 0.1.1.x:
4149 - The fix to close duplicate server connections was closing all
4150 Tor client connections if they didn't establish a circuit
4151 quickly enough. Oops.
4152 - Fix minor memory issue (double-free) that happened on exit.
4154 o Bugfixes on 0.1.0.x:
4155 - Tor didn't warn when it failed to open a log file.
4158 Changes in version 0.1.1.11-alpha - 2006-01-10
4159 o Crashes in 0.1.1.x:
4160 - Include all the assert/crash fixes from 0.1.0.16.
4161 - If you start Tor and then quit very quickly, there were some
4162 races that tried to free things that weren't allocated yet.
4163 - Fix a rare memory stomp if you're running hidden services.
4164 - Fix segfault when specifying DirServer in config without nickname.
4165 - Fix a seg fault when you finish connecting to a server but at
4166 that moment you dump his server descriptor.
4167 - Extendcircuit and Attachstream controller commands would
4168 assert/crash if you don't give them enough arguments.
4169 - Fix an assert error when we're out of space in the connection_list
4170 and we try to post a hidden service descriptor (reported by weasel).
4171 - If you specify a relative torrc path and you set RunAsDaemon in
4172 your torrc, then it chdir()'s to the new directory. If you HUP,
4173 it tries to load the new torrc location, fails, and exits.
4174 The fix: no longer allow a relative path to torrc using -f.
4177 - Implement "entry guards": automatically choose a handful of entry
4178 nodes and stick with them for all circuits. Only pick new guards
4179 when the ones you have are unsuitable, and if the old guards
4180 become suitable again, switch back. This will increase security
4181 dramatically against certain end-point attacks. The EntryNodes
4182 config option now provides some hints about which entry guards you
4183 want to use most; and StrictEntryNodes means to only use those.
4184 - New directory logic: download by descriptor digest, not by
4185 fingerprint. Caches try to download all listed digests from
4186 authorities; clients try to download "best" digests from caches.
4187 This avoids partitioning and isolating attacks better.
4188 - Make the "stable" router flag in network-status be the median of
4189 the uptimes of running valid servers, and make clients pay
4190 attention to the network-status flags. Thus the cutoff adapts
4191 to the stability of the network as a whole, making IRC, IM, etc
4192 connections more reliable.
4195 - Tor servers with dynamic IP addresses were needing to wait 18
4196 hours before they could start doing reachability testing using
4197 the new IP address and ports. This is because they were using
4198 the internal descriptor to learn what to test, yet they were only
4199 rebuilding the descriptor once they decided they were reachable.
4200 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
4201 to download certain server descriptors, throw them away, and then
4202 fetch them again after 30 minutes. Now mirrors throw away these
4203 server descriptors so clients can't get them.
4204 - We were leaving duplicate connections to other ORs open for a week,
4205 rather than closing them once we detect a duplicate. This only
4206 really affected authdirservers, but it affected them a lot.
4207 - Spread the authdirservers' reachability testing over the entire
4208 testing interval, so we don't try to do 500 TLS's at once every
4212 - If the network is down, and we try to connect to a conn because
4213 we have a circuit in mind, and we timeout (30 seconds) because the
4214 network never answers, we were expiring the circuit, but we weren't
4215 obsoleting the connection or telling the entry_guards functions.
4216 - Some Tor servers process billions of cells per day. These statistics
4217 need to be uint64_t's.
4218 - Check for integer overflows in more places, when adding elements
4219 to smartlists. This could possibly prevent a buffer overflow
4220 on malicious huge inputs. I don't see any, but I haven't looked
4222 - ReachableAddresses kept growing new "reject *:*" lines on every
4224 - When you "setconf log" via the controller, it should remove all
4225 logs. We were automatically adding back in a "log notice stdout".
4226 - Newly bootstrapped Tor networks couldn't establish hidden service
4227 circuits until they had nodes with high uptime. Be more tolerant.
4228 - We were marking servers down when they could not answer every piece
4229 of the directory request we sent them. This was far too harsh.
4230 - Fix the torify (tsocks) config file to not use Tor for localhost
4232 - Directory authorities now go to the proper authority when asking for
4233 a networkstatus, even when they want a compressed one.
4234 - Fix a harmless bug that was causing Tor servers to log
4235 "Got an end because of misc error, but we're not an AP. Closing."
4236 - Authorities were treating their own descriptor changes as cosmetic,
4237 meaning the descriptor available in the network-status and the
4238 descriptor that clients downloaded were different.
4239 - The OS X installer was adding a symlink for tor_resolve but
4240 the binary was called tor-resolve (reported by Thomas Hardly).
4241 - Workaround a problem with some http proxies where they refuse GET
4242 requests that specify "Content-Length: 0" (reported by Adrian).
4243 - Fix wrong log message when you add a "HiddenServiceNodes" config
4244 line without any HiddenServiceDir line (reported by Chris Thomas).
4247 - Write the TorVersion into the state file so we have a prayer of
4248 keeping forward and backward compatibility.
4249 - Revive the FascistFirewall config option rather than eliminating it:
4250 now it's a synonym for ReachableAddresses *:80,*:443.
4251 - Clients choose directory servers from the network status lists,
4252 not from their internal list of router descriptors. Now they can
4253 go to caches directly rather than needing to go to authorities
4255 - Directory authorities ignore router descriptors that have only
4256 cosmetic differences: do this for 0.1.0.x servers now too.
4257 - Add a new flag to network-status indicating whether the server
4258 can answer v2 directory requests too.
4259 - Authdirs now stop whining so loudly about bad descriptors that
4260 they fetch from other dirservers. So when there's a log complaint,
4261 it's for sure from a freshly uploaded descriptor.
4262 - Reduce memory requirements in our structs by changing the order
4264 - There used to be two ways to specify your listening ports in a
4265 server descriptor: on the "router" line and with a separate "ports"
4266 line. Remove support for the "ports" line.
4267 - New config option "AuthDirRejectUnlisted" for auth dirservers as
4268 a panic button: if we get flooded with unusable servers we can
4269 revert to only listing servers in the approved-routers file.
4270 - Auth dir servers can now mark a fingerprint as "!reject" or
4271 "!invalid" in the approved-routers file (as its nickname), to
4272 refuse descriptors outright or include them but marked as invalid.
4273 - Servers store bandwidth history across restarts/crashes.
4274 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
4275 get a better idea of why their circuits failed. Not used yet.
4276 - Directory mirrors now cache up to 16 unrecognized network-status
4277 docs. Now we can add new authdirservers and they'll be cached too.
4278 - When picking a random directory, prefer non-authorities if any
4280 - New controller option "getinfo desc/all-recent" to fetch the
4281 latest server descriptor for every router that Tor knows about.
4284 Changes in version 0.1.0.16 - 2006-01-02
4285 o Crash bugfixes on 0.1.0.x:
4286 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
4287 corrupting the heap, losing FDs, or crashing when we need to resize
4288 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
4289 - It turns out sparc64 platforms crash on unaligned memory access
4290 too -- so detect and avoid this.
4291 - Handle truncated compressed data correctly (by detecting it and
4293 - Fix possible-but-unlikely free(NULL) in control.c.
4294 - When we were closing connections, there was a rare case that
4295 stomped on memory, triggering seg faults and asserts.
4296 - Avoid potential infinite recursion when building a descriptor. (We
4297 don't know that it ever happened, but better to fix it anyway.)
4298 - We were neglecting to unlink marked circuits from soon-to-close OR
4299 connections, which caused some rare scribbling on freed memory.
4300 - Fix a memory stomping race bug when closing the joining point of two
4301 rendezvous circuits.
4302 - Fix an assert in time parsing found by Steven Murdoch.
4304 o Other bugfixes on 0.1.0.x:
4305 - When we're doing reachability testing, provide more useful log
4306 messages so the operator knows what to expect.
4307 - Do not check whether DirPort is reachable when we are suppressing
4308 advertising it because of hibernation.
4309 - When building with -static or on Solaris, we sometimes needed -ldl.
4310 - When we're deciding whether a stream has enough circuits around
4311 that can handle it, count the freshly dirty ones and not the ones
4312 that are so dirty they won't be able to handle it.
4313 - When we're expiring old circuits, we had a logic error that caused
4314 us to close new rendezvous circuits rather than old ones.
4315 - Give a more helpful log message when you try to change ORPort via
4316 the controller: you should upgrade Tor if you want that to work.
4317 - We were failing to parse Tor versions that start with "Tor ".
4318 - Tolerate faulty streams better: when a stream fails for reason
4319 exitpolicy, stop assuming that the router is lying about his exit
4320 policy. When a stream fails for reason misc, allow it to retry just
4321 as if it was resolvefailed. When a stream has failed three times,
4322 reset its failure count so we can try again and get all three tries.
4325 Changes in version 0.1.1.10-alpha - 2005-12-11
4326 o Correctness bugfixes on 0.1.0.x:
4327 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
4328 corrupting the heap, losing FDs, or crashing when we need to resize
4329 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
4330 - Stop doing the complex voodoo overkill checking for insecure
4331 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
4332 - When we were closing connections, there was a rare case that
4333 stomped on memory, triggering seg faults and asserts.
4334 - We were neglecting to unlink marked circuits from soon-to-close OR
4335 connections, which caused some rare scribbling on freed memory.
4336 - When we're deciding whether a stream has enough circuits around
4337 that can handle it, count the freshly dirty ones and not the ones
4338 that are so dirty they won't be able to handle it.
4339 - Recover better from TCP connections to Tor servers that are
4340 broken but don't tell you (it happens!); and rotate TLS
4341 connections once a week.
4342 - When we're expiring old circuits, we had a logic error that caused
4343 us to close new rendezvous circuits rather than old ones.
4344 - Fix a scary-looking but apparently harmless bug where circuits
4345 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
4346 servers, and never switch to state CIRCUIT_STATE_OPEN.
4347 - When building with -static or on Solaris, we sometimes needed to
4349 - Give a useful message when people run Tor as the wrong user,
4350 rather than telling them to start chowning random directories.
4351 - We were failing to inform the controller about new .onion streams.
4353 o Security bugfixes on 0.1.0.x:
4354 - Refuse server descriptors if the fingerprint line doesn't match
4355 the included identity key. Tor doesn't care, but other apps (and
4356 humans) might actually be trusting the fingerprint line.
4357 - We used to kill the circuit when we receive a relay command we
4358 don't recognize. Now we just drop it.
4359 - Start obeying our firewall options more rigorously:
4360 . If we can't get to a dirserver directly, try going via Tor.
4361 . Don't ever try to connect (as a client) to a place our
4362 firewall options forbid.
4363 . If we specify a proxy and also firewall options, obey the
4364 firewall options even when we're using the proxy: some proxies
4365 can only proxy to certain destinations.
4366 - Fix a bug found by Lasse Overlier: when we were making internal
4367 circuits (intended to be cannibalized later for rendezvous and
4368 introduction circuits), we were picking them so that they had
4369 useful exit nodes. There was no need for this, and it actually
4370 aids some statistical attacks.
4371 - Start treating internal circuits and exit circuits separately.
4372 It's important to keep them separate because internal circuits
4373 have their last hops picked like middle hops, rather than like
4374 exit hops. So exiting on them will break the user's expectations.
4376 o Bugfixes on 0.1.1.x:
4377 - Take out the mis-feature where we tried to detect IP address
4378 flapping for people with DynDNS, and chose not to upload a new
4379 server descriptor sometimes.
4380 - Try to be compatible with OpenSSL 0.9.6 again.
4381 - Log fix: when the controller is logging about .onion addresses,
4382 sometimes it didn't include the ".onion" part of the address.
4383 - Don't try to modify options->DirServers internally -- if the
4384 user didn't specify any, just add the default ones directly to
4385 the trusted dirserver list. This fixes a bug where people running
4386 controllers would use SETCONF on some totally unrelated config
4387 option, and Tor would start yelling at them about changing their
4389 - Let the controller's redirectstream command specify a port, in
4390 case the controller wants to change that too.
4391 - When we requested a pile of server descriptors, we sometimes
4392 accidentally launched a duplicate request for the first one.
4393 - Bugfix for trackhostexits: write down the fingerprint of the
4394 chosen exit, not its nickname, because the chosen exit might not
4396 - When parsing foo.exit, if foo is unknown, and we are leaving
4397 circuits unattached, set the chosen_exit field and leave the
4398 address empty. This matters because controllers got confused
4400 - Directory authorities no longer try to download server
4401 descriptors that they know they will reject.
4403 o Features and updates:
4404 - Replace balanced trees with hash tables: this should make stuff
4405 significantly faster.
4406 - Resume using the AES counter-mode implementation that we ship,
4407 rather than OpenSSL's. Ours is significantly faster.
4408 - Many other CPU and memory improvements.
4409 - Add a new config option FastFirstHopPK (on by default) so clients
4410 do a trivial crypto handshake for their first hop, since TLS has
4411 already taken care of confidentiality and authentication.
4412 - Add a new config option TestSocks so people can see if their
4413 applications are using socks4, socks4a, socks5-with-ip, or
4414 socks5-with-hostname. This way they don't have to keep mucking
4415 with tcpdump and wondering if something got cached somewhere.
4416 - Warn when listening on a public address for socks. I suspect a
4417 lot of people are setting themselves up as open socks proxies,
4418 and they have no idea that jerks on the Internet are using them,
4419 since they simply proxy the traffic into the Tor network.
4420 - Add "private:*" as an alias in configuration for policies. Now
4421 you can simplify your exit policy rather than needing to list
4422 every single internal or nonroutable network space.
4423 - Add a new controller event type that allows controllers to get
4424 all server descriptors that were uploaded to a router in its role
4425 as authoritative dirserver.
4426 - Start shipping socks-extensions.txt, tor-doc-unix.html,
4427 tor-doc-server.html, and stylesheet.css in the tarball.
4428 - Stop shipping tor-doc.html in the tarball.
4431 Changes in version 0.1.1.9-alpha - 2005-11-15
4432 o Usability improvements:
4433 - Start calling it FooListenAddress rather than FooBindAddress,
4434 since few of our users know what it means to bind an address
4436 - Reduce clutter in server logs. We're going to try to make
4437 them actually usable now. New config option ProtocolWarnings that
4438 lets you hear about how _other Tors_ are breaking the protocol. Off
4440 - Divide log messages into logging domains. Once we put some sort
4441 of interface on this, it will let people looking at more verbose
4442 log levels specify the topics they want to hear more about.
4443 - Make directory servers return better http 404 error messages
4444 instead of a generic "Servers unavailable".
4445 - Check for even more Windows version flags when writing the platform
4446 string in server descriptors, and note any we don't recognize.
4447 - Clean up more of the OpenSSL memory when exiting, so we can detect
4448 memory leaks better.
4449 - Make directory authorities be non-versioning, non-naming by
4450 default. Now we can add new directory servers without requiring
4451 their operators to pay close attention.
4452 - When logging via syslog, include the pid whenever we provide
4453 a log entry. Suggested by Todd Fries.
4455 o Performance improvements:
4456 - Directory servers now silently throw away new descriptors that
4457 haven't changed much if the timestamps are similar. We do this to
4458 tolerate older Tor servers that upload a new descriptor every 15
4459 minutes. (It seemed like a good idea at the time.)
4460 - Inline bottleneck smartlist functions; use fast versions by default.
4461 - Add a "Map from digest to void*" abstraction digestmap_t so we
4462 can do less hex encoding/decoding. Use it in router_get_by_digest()
4463 to resolve a performance bottleneck.
4464 - Allow tor_gzip_uncompress to extract as much as possible from
4465 truncated compressed data. Try to extract as many
4466 descriptors as possible from truncated http responses (when
4467 DIR_PURPOSE_FETCH_ROUTERDESC).
4468 - Make circ->onionskin a pointer, not a static array. moria2 was using
4469 125000 circuit_t's after it had been up for a few weeks, which
4470 translates to 20+ megs of wasted space.
4471 - The private half of our EDH handshake keys are now chosen out
4472 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
4474 o Security improvements:
4475 - Start making directory caches retain old routerinfos, so soon
4476 clients can start asking by digest of descriptor rather than by
4477 fingerprint of server.
4478 - Add half our entropy from RAND_poll in OpenSSL. This knows how
4479 to use egd (if present), openbsd weirdness (if present), vms/os2
4480 weirdness (if we ever port there), and more in the future.
4482 o Bugfixes on 0.1.0.x:
4483 - Do round-robin writes of at most 16 kB per write. This might be
4484 more fair on loaded Tor servers, and it might resolve our Windows
4485 crash bug. It might also slow things down.
4486 - Our TLS handshakes were generating a single public/private
4487 keypair for the TLS context, rather than making a new one for
4488 each new connections. Oops. (But we were still rotating them
4489 periodically, so it's not so bad.)
4490 - When we were cannibalizing a circuit with a particular exit
4491 node in mind, we weren't checking to see if that exit node was
4492 already present earlier in the circuit. Oops.
4493 - When a Tor server's IP changes (e.g. from a dyndns address),
4494 upload a new descriptor so clients will learn too.
4495 - Really busy servers were keeping enough circuits open on stable
4496 connections that they were wrapping around the circuit_id
4497 space. (It's only two bytes.) This exposed a bug where we would
4498 feel free to reuse a circuit_id even if it still exists but has
4499 been marked for close. Try to fix this bug. Some bug remains.
4500 - If we would close a stream early (e.g. it asks for a .exit that
4501 we know would refuse it) but the LeaveStreamsUnattached config
4502 option is set by the controller, then don't close it.
4504 o Bugfixes on 0.1.1.8-alpha:
4505 - Fix a big pile of memory leaks, some of them serious.
4506 - Do not try to download a routerdesc if we would immediately reject
4508 - Resume inserting a newline between all router descriptors when
4509 generating (old style) signed directories, since our spec says
4511 - When providing content-type application/octet-stream for
4512 server descriptors using .z, we were leaving out the
4513 content-encoding header. Oops. (Everything tolerated this just
4514 fine, but that doesn't mean we need to be part of the problem.)
4515 - Fix a potential seg fault in getconf and getinfo using version 1
4516 of the controller protocol.
4517 - Avoid crash: do not check whether DirPort is reachable when we
4518 are suppressing it because of hibernation.
4519 - Make --hash-password not crash on exit.
4522 Changes in version 0.1.1.8-alpha - 2005-10-07
4523 o New features (major):
4524 - Clients don't download or use the directory anymore. Now they
4525 download and use network-statuses from the trusted dirservers,
4526 and fetch individual server descriptors as needed from mirrors.
4527 See dir-spec.txt for all the gory details.
4528 - Be more conservative about whether to advertise our DirPort.
4529 The main change is to not advertise if we're running at capacity
4530 and either a) we could hibernate or b) our capacity is low and
4531 we're using a default DirPort.
4532 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
4534 o New features (minor):
4535 - Try to be smart about when to retry network-status and
4536 server-descriptor fetches. Still needs some tuning.
4537 - Stop parsing, storing, or using running-routers output (but
4538 mirrors still cache and serve it).
4539 - Consider a threshold of versioning dirservers (dirservers who have
4540 an opinion about which Tor versions are still recommended) before
4541 deciding whether to warn the user that he's obsolete.
4542 - Dirservers can now reject/invalidate by key and IP, with the
4543 config options "AuthDirInvalid" and "AuthDirReject". This is
4544 useful since currently we automatically list servers as running
4545 and usable even if we know they're jerks.
4546 - Provide dire warnings to any users who set DirServer; move it out
4547 of torrc.sample and into torrc.complete.
4548 - Add MyFamily to torrc.sample in the server section.
4549 - Add nicknames to the DirServer line, so we can refer to them
4550 without requiring all our users to memorize their IP addresses.
4551 - When we get an EOF or a timeout on a directory connection, note
4552 how many bytes of serverdesc we are dropping. This will help
4553 us determine whether it is smart to parse incomplete serverdesc
4555 - Add a new function to "change pseudonyms" -- that is, to stop
4556 using any currently-dirty circuits for new streams, so we don't
4557 link new actions to old actions. Currently it's only called on
4558 HUP (or SIGNAL RELOAD).
4559 - On sighup, if UseHelperNodes changed to 1, use new circuits.
4560 - Start using RAND_bytes rather than RAND_pseudo_bytes from
4561 OpenSSL. Also, reseed our entropy every hour, not just at
4562 startup. And entropy in 512-bit chunks, not 160-bit chunks.
4564 o Fixes on 0.1.1.7-alpha:
4565 - Nobody ever implemented EVENT_ADDRMAP for control protocol
4566 version 0, so don't let version 0 controllers ask for it.
4567 - If you requested something with too many newlines via the
4568 v1 controller protocol, you could crash tor.
4569 - Fix a number of memory leaks, including some pretty serious ones.
4570 - Re-enable DirPort testing again, so Tor servers will be willing
4571 to advertise their DirPort if it's reachable.
4572 - On TLS handshake, only check the other router's nickname against
4573 its expected nickname if is_named is set.
4575 o Fixes forward-ported from 0.1.0.15:
4576 - Don't crash when we don't have any spare file descriptors and we
4577 try to spawn a dns or cpu worker.
4578 - Make the numbers in read-history and write-history into uint64s,
4579 so they don't overflow and publish negatives in the descriptor.
4582 - For the OS X package's modified privoxy config file, comment
4583 out the "logfile" line so we don't log everything passed
4585 - We were whining about using socks4 or socks5-with-local-lookup
4586 even when it's an IP in the "virtual" range we designed exactly
4588 - We were leaking some memory every time the client changes IPs.
4589 - Never call free() on tor_malloc()d memory. This will help us
4590 use dmalloc to detect memory leaks.
4591 - Check for named servers when looking them up by nickname;
4592 warn when we'recalling a non-named server by its nickname;
4593 don't warn twice about the same name.
4594 - Try to list MyFamily elements by key, not by nickname, and warn
4595 if we've not heard of the server.
4596 - Make windows platform detection (uname equivalent) smarter.
4597 - It turns out sparc64 doesn't like unaligned access either.
4600 Changes in version 0.1.0.15 - 2005-09-23
4601 o Bugfixes on 0.1.0.x:
4602 - Reject ports 465 and 587 (spam targets) in default exit policy.
4603 - Don't crash when we don't have any spare file descriptors and we
4604 try to spawn a dns or cpu worker.
4605 - Get rid of IgnoreVersion undocumented config option, and make us
4606 only warn, never exit, when we're running an obsolete version.
4607 - Don't try to print a null string when your server finds itself to
4608 be unreachable and the Address config option is empty.
4609 - Make the numbers in read-history and write-history into uint64s,
4610 so they don't overflow and publish negatives in the descriptor.
4611 - Fix a minor memory leak in smartlist_string_remove().
4612 - We were only allowing ourselves to upload a server descriptor at
4613 most every 20 minutes, even if it changed earlier than that.
4614 - Clean up log entries that pointed to old URLs.
4617 Changes in version 0.1.1.7-alpha - 2005-09-14
4618 o Fixes on 0.1.1.6-alpha:
4619 - Exit servers were crashing when people asked them to make a
4620 connection to an address not in their exit policy.
4621 - Looking up a non-existent stream for a v1 control connection would
4623 - Fix a seg fault if we ask a dirserver for a descriptor by
4624 fingerprint but he doesn't know about him.
4625 - SETCONF was appending items to linelists, not clearing them.
4626 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
4627 out and refuse the setconf if it would fail.
4628 - Downgrade the dirserver log messages when whining about
4632 - Add Peter Palfrader's check-tor script to tor/contrib/
4633 It lets you easily check whether a given server (referenced by
4634 nickname) is reachable by you.
4635 - Numerous changes to move towards client-side v2 directories. Not
4639 - If the user gave tor an odd number of command-line arguments,
4640 we were silently ignoring the last one. Now we complain and fail.
4641 [This wins the oldest-bug prize -- this bug has been present since
4642 November 2002, as released in Tor 0.0.0.]
4643 - Do not use unaligned memory access on alpha, mips, or mipsel.
4644 It *works*, but is very slow, so we treat them as if it doesn't.
4645 - Retry directory requests if we fail to get an answer we like
4646 from a given dirserver (we were retrying before, but only if
4647 we fail to connect).
4648 - When writing the RecommendedVersions line, sort them first.
4649 - When the client asked for a rendezvous port that the hidden
4650 service didn't want to provide, we were sending an IP address
4651 back along with the end cell. Fortunately, it was zero. But stop
4653 - Correct "your server is reachable" log entries to indicate that
4654 it was self-testing that told us so.
4657 Changes in version 0.1.1.6-alpha - 2005-09-09
4658 o Fixes on 0.1.1.5-alpha:
4659 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
4660 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
4661 - Fix bug with tor_memmem finding a match at the end of the string.
4662 - Make unit tests run without segfaulting.
4663 - Resolve some solaris x86 compile warnings.
4664 - Handle duplicate lines in approved-routers files without warning.
4665 - Fix bug where as soon as a server refused any requests due to his
4666 exit policy (e.g. when we ask for localhost and he tells us that's
4667 127.0.0.1 and he won't do it), we decided he wasn't obeying his
4668 exit policy using him for any exits.
4669 - Only do openssl hardware accelerator stuff if openssl version is
4672 o New controller features/fixes:
4673 - Add a "RESETCONF" command so you can set config options like
4674 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
4675 a config option in the torrc with no value, then it clears it
4676 entirely (rather than setting it to its default).
4677 - Add a "GETINFO config-file" to tell us where torrc is.
4678 - Avoid sending blank lines when GETINFO replies should be empty.
4679 - Add a QUIT command for the controller (for using it manually).
4680 - Fix a bug in SAVECONF that was adding default dirservers and
4681 other redundant entries to the torrc file.
4683 o Start on the new directory design:
4684 - Generate, publish, cache, serve new network-status format.
4685 - Publish individual descriptors (by fingerprint, by "all", and by
4687 - Publish client and server recommended versions separately.
4688 - Allow tor_gzip_uncompress() to handle multiple concatenated
4689 compressed strings. Serve compressed groups of router
4690 descriptors. The compression logic here could be more
4692 - Distinguish v1 authorities (all currently trusted directories)
4693 from v2 authorities (all trusted directories).
4694 - Change DirServers config line to note which dirs are v1 authorities.
4695 - Add configuration option "V1AuthoritativeDirectory 1" which
4696 moria1, moria2, and tor26 should set.
4697 - Remove option when getting directory cache to see whether they
4698 support running-routers; they all do now. Replace it with one
4699 to see whether caches support v2 stuff.
4702 - Dirservers now do their own external reachability testing of each
4703 Tor server, and only list them as running if they've been found to
4704 be reachable. We also send back warnings to the server's logs if
4705 it uploads a descriptor that we already believe is unreachable.
4706 - Implement exit enclaves: if we know an IP address for the
4707 destination, and there's a running Tor server at that address
4708 which allows exit to the destination, then extend the circuit to
4709 that exit first. This provides end-to-end encryption and end-to-end
4710 authentication. Also, if the user wants a .exit address or enclave,
4711 use 4 hops rather than 3, and cannibalize a general circ for it
4713 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
4714 controller. Also, rotate dns and cpu workers if the controller
4715 changes options that will affect them; and initialize the dns
4716 worker cache tree whether or not we start out as a server.
4717 - Only upload a new server descriptor when options change, 18
4718 hours have passed, uptime is reset, or bandwidth changes a lot.
4719 - Check [X-]Forwarded-For headers in HTTP requests when generating
4720 log messages. This lets people run dirservers (and caches) behind
4721 Apache but still know which IP addresses are causing warnings.
4723 o Config option changes:
4724 - Replace (Fascist)Firewall* config options with a new
4725 ReachableAddresses option that understands address policies.
4726 For example, "ReachableAddresses *:80,*:443"
4727 - Get rid of IgnoreVersion undocumented config option, and make us
4728 only warn, never exit, when we're running an obsolete version.
4729 - Make MonthlyAccountingStart config option truly obsolete now.
4732 - Reject ports 465 and 587 in the default exit policy, since
4733 people have started using them for spam too.
4734 - It turns out we couldn't bootstrap a network since we added
4735 reachability detection in 0.1.0.1-rc. Good thing the Tor network
4736 has never gone down. Add an AssumeReachable config option to let
4737 servers and dirservers bootstrap. When we're trying to build a
4738 high-uptime or high-bandwidth circuit but there aren't enough
4739 suitable servers, try being less picky rather than simply failing.
4740 - Our logic to decide if the OR we connected to was the right guy
4741 was brittle and maybe open to a mitm for unverified routers.
4742 - We weren't cannibalizing circuits correctly for
4743 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
4744 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
4745 build those from scratch. This should make hidden services faster.
4746 - Predict required circuits better, with an eye toward making hidden
4747 services faster on the service end.
4748 - Retry streams if the exit node sends back a 'misc' failure. This
4749 should result in fewer random failures. Also, after failing
4750 from resolve failed or misc, reset the num failures, so we give
4751 it a fair shake next time we try.
4752 - Clean up the rendezvous warn log msgs, and downgrade some to info.
4753 - Reduce severity on logs about dns worker spawning and culling.
4754 - When we're shutting down and we do something like try to post a
4755 server descriptor or rendezvous descriptor, don't complain that
4756 we seem to be unreachable. Of course we are, we're shutting down.
4757 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
4758 We don't use them yet, but maybe one day our DNS resolver will be
4759 able to discover them.
4760 - Make ContactInfo mandatory for authoritative directory servers.
4761 - Require server descriptors to list IPv4 addresses -- hostnames
4762 are no longer allowed. This also fixes some potential security
4763 problems with people providing hostnames as their address and then
4764 preferentially resolving them to partition users.
4765 - Change log line for unreachability to explicitly suggest /etc/hosts
4766 as the culprit. Also make it clearer what IP address and ports we're
4767 testing for reachability.
4768 - Put quotes around user-supplied strings when logging so users are
4769 more likely to realize if they add bad characters (like quotes)
4771 - Let auth dir servers start without specifying an Address config
4773 - Make unit tests (and other invocations that aren't the real Tor)
4774 run without launching listeners, creating subdirectories, and so on.
4777 Changes in version 0.1.1.5-alpha - 2005-08-08
4778 o Bugfixes included in 0.1.0.14.
4780 o Bugfixes on 0.1.0.x:
4781 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
4782 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
4783 it would silently using ignore the 6668.
4786 Changes in version 0.1.0.14 - 2005-08-08
4787 o Bugfixes on 0.1.0.x:
4788 - Fix the other half of the bug with crypto handshakes
4790 - Fix an assert trigger if you send a 'signal term' via the
4791 controller when it's listening for 'event info' messages.
4794 Changes in version 0.1.1.4-alpha - 2005-08-04
4795 o Bugfixes included in 0.1.0.13.
4798 - Improve tor_gettimeofday() granularity on windows.
4799 - Make clients regenerate their keys when their IP address changes.
4800 - Implement some more GETINFO goodness: expose helper nodes, config
4801 options, getinfo keys.
4804 Changes in version 0.1.0.13 - 2005-08-04
4805 o Bugfixes on 0.1.0.x:
4806 - Fix a critical bug in the security of our crypto handshakes.
4807 - Fix a size_t underflow in smartlist_join_strings2() that made
4808 it do bad things when you hand it an empty smartlist.
4809 - Fix Windows installer to ship Tor license (thanks to Aphex for
4810 pointing out this oversight) and put a link to the doc directory
4812 - Explicitly set no-unaligned-access for sparc: it turns out the
4813 new gcc's let you compile broken code, but that doesn't make it
4817 Changes in version 0.1.1.3-alpha - 2005-07-23
4818 o Bugfixes on 0.1.1.2-alpha:
4819 - Fix a bug in handling the controller's "post descriptor"
4821 - Fix several bugs in handling the controller's "extend circuit"
4823 - Fix a bug in handling the controller's "stream status" event.
4824 - Fix an assert failure if we have a controller listening for
4825 circuit events and we go offline.
4826 - Re-allow hidden service descriptors to publish 0 intro points.
4827 - Fix a crash when generating your hidden service descriptor if
4828 you don't have enough intro points already.
4830 o New features on 0.1.1.2-alpha:
4831 - New controller function "getinfo accounting", to ask how
4832 many bytes we've used in this time period.
4833 - Experimental support for helper nodes: a lot of the risk from
4834 a small static adversary comes because users pick new random
4835 nodes every time they rebuild a circuit. Now users will try to
4836 stick to the same small set of entry nodes if they can. Not
4837 enabled by default yet.
4839 o Bugfixes on 0.1.0.12:
4840 - If you're an auth dir server, always publish your dirport,
4841 even if you haven't yet found yourself to be reachable.
4842 - Fix a size_t underflow in smartlist_join_strings2() that made
4843 it do bad things when you hand it an empty smartlist.
4846 Changes in version 0.1.0.12 - 2005-07-18
4847 o New directory servers:
4848 - tor26 has changed IP address.
4850 o Bugfixes on 0.1.0.x:
4851 - Fix a possible double-free in tor_gzip_uncompress().
4852 - When --disable-threads is set, do not search for or link against
4854 - Don't trigger an assert if an authoritative directory server
4855 claims its dirport is 0.
4856 - Fix bug with removing Tor as an NT service: some people were
4857 getting "The service did not return an error." Thanks to Matt
4861 Changes in version 0.1.1.2-alpha - 2005-07-15
4862 o New directory servers:
4863 - tor26 has changed IP address.
4865 o Bugfixes on 0.1.0.x, crashes/leaks:
4866 - Port the servers-not-obeying-their-exit-policies fix from
4868 - Fix an fd leak in start_daemon().
4869 - On Windows, you can't always reopen a port right after you've
4870 closed it. So change retry_listeners() to only close and re-open
4871 ports that have changed.
4872 - Fix a possible double-free in tor_gzip_uncompress().
4874 o Bugfixes on 0.1.0.x, usability:
4875 - When tor_socketpair() fails in Windows, give a reasonable
4876 Windows-style errno back.
4877 - Let people type "tor --install" as well as "tor -install" when
4879 want to make it an NT service.
4880 - NT service patch from Matt Edman to improve error messages.
4881 - When the controller asks for a config option with an abbreviated
4882 name, give the full name in our response.
4883 - Correct the man page entry on TrackHostExitsExpire.
4884 - Looks like we were never delivering deflated (i.e. compressed)
4885 running-routers lists, even when asked. Oops.
4886 - When --disable-threads is set, do not search for or link against
4889 o Bugfixes on 0.1.1.x:
4890 - Fix a seg fault with autodetecting which controller version is
4894 - New hidden service descriptor format: put a version in it, and
4895 let people specify introduction/rendezvous points that aren't
4896 in "the directory" (which is subjective anyway).
4897 - Allow the DEBUG controller event to work again. Mark certain log
4898 entries as "don't tell this to controllers", so we avoid cycles.
4901 Changes in version 0.1.0.11 - 2005-06-30
4902 o Bugfixes on 0.1.0.x:
4903 - Fix major security bug: servers were disregarding their
4904 exit policies if clients behaved unexpectedly.
4905 - Make OS X init script check for missing argument, so we don't
4906 confuse users who invoke it incorrectly.
4907 - Fix a seg fault in "tor --hash-password foo".
4908 - The MAPADDRESS control command was broken.
4911 Changes in version 0.1.1.1-alpha - 2005-06-29
4913 - Make OS X init script check for missing argument, so we don't
4914 confuse users who invoke it incorrectly.
4915 - Fix a seg fault in "tor --hash-password foo".
4916 - Fix a possible way to DoS dirservers.
4917 - When we complain that your exit policy implicitly allows local or
4918 private address spaces, name them explicitly so operators can
4920 - Make the log message less scary when all the dirservers are
4921 temporarily unreachable.
4922 - We were printing the number of idle dns workers incorrectly when
4926 - Revised controller protocol (version 1) that uses ascii rather
4927 than binary. Add supporting libraries in python and java so you
4928 can use the controller from your applications without caring how
4930 - Spiffy new support for crypto hardware accelerators. Can somebody
4934 Changes in version 0.0.9.10 - 2005-06-16
4935 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
4936 - Refuse relay cells that claim to have a length larger than the
4937 maximum allowed. This prevents a potential attack that could read
4938 arbitrary memory (e.g. keys) from an exit server's process
4942 Changes in version 0.1.0.10 - 2005-06-14
4943 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
4944 libevent before 1.1a.
4947 Changes in version 0.1.0.9-rc - 2005-06-09
4949 - Reset buf->highwater every time buf_shrink() is called, not just on
4950 a successful shrink. This was causing significant memory bloat.
4951 - Fix buffer overflow when checking hashed passwords.
4952 - Security fix: if seeding the RNG on Win32 fails, quit.
4953 - Allow seeding the RNG on Win32 even when you're not running as
4955 - Disable threading on Solaris too. Something is wonky with it,
4956 cpuworkers, and reentrant libs.
4957 - Reenable the part of the code that tries to flush as soon as an
4958 OR outbuf has a full TLS record available. Perhaps this will make
4959 OR outbufs not grow as huge except in rare cases, thus saving lots
4960 of CPU time plus memory.
4961 - Reject malformed .onion addresses rather then passing them on as
4962 normal web requests.
4963 - Adapt patch from Adam Langley: fix possible memory leak in
4964 tor_lookup_hostname().
4965 - Initialize libevent later in the startup process, so the logs are
4966 already established by the time we start logging libevent warns.
4967 - Use correct errno on win32 if libevent fails.
4968 - Check and warn about known-bad/slow libevent versions.
4969 - Pay more attention to the ClientOnly config option.
4970 - Have torctl.in/tor.sh.in check for location of su binary (needed
4972 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
4973 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
4974 HttpProxyAuthenticator
4975 - Stop warning about sigpipes in the logs. We're going to
4976 pretend that getting these occassionally is normal and fine.
4977 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
4979 installer screens; and don't put stuff into StartupItems unless
4980 the user asks you to.
4981 - Require servers that use the default dirservers to have public IP
4982 addresses. We have too many servers that are configured with private
4983 IPs and their admins never notice the log entries complaining that
4984 their descriptors are being rejected.
4985 - Add OSX uninstall instructions. An actual uninstall script will
4989 Changes in version 0.1.0.8-rc - 2005-05-23
4991 - It turns out that kqueue on OS X 10.3.9 was causing kernel
4992 panics. Disable kqueue on all OS X Tors.
4993 - Fix RPM: remove duplicate line accidentally added to the rpm
4995 - Disable threads on openbsd too, since its gethostaddr is not
4997 - Tolerate libevent 0.8 since it still works, even though it's
4999 - Enable building on Red Hat 9.0 again.
5000 - Allow the middle hop of the testing circuit to be running any
5001 version, now that most of them have the bugfix to let them connect
5002 to unknown servers. This will allow reachability testing to work
5003 even when 0.0.9.7-0.0.9.9 become obsolete.
5004 - Handle relay cells with rh.length too large. This prevents
5005 a potential attack that could read arbitrary memory (maybe even
5006 keys) from the exit server's process.
5007 - We screwed up the dirport reachability testing when we don't yet
5008 have a cached version of the directory. Hopefully now fixed.
5009 - Clean up router_load_single_router() (used by the controller),
5010 so it doesn't seg fault on error.
5011 - Fix a minor memory leak when somebody establishes an introduction
5012 point at your Tor server.
5013 - If a socks connection ends because read fails, don't warn that
5014 you're not sending a socks reply back.
5017 - Add HttpProxyAuthenticator config option too, that works like
5018 the HttpsProxyAuthenticator config option.
5019 - Encode hashed controller passwords in hex instead of base64,
5020 to make it easier to write controllers.
5023 Changes in version 0.1.0.7-rc - 2005-05-17
5025 - Fix a bug in the OS X package installer that prevented it from
5026 installing on Tiger.
5027 - Fix a script bug in the OS X package installer that made it
5028 complain during installation.
5029 - Find libevent even if it's hiding in /usr/local/ and your
5030 CFLAGS and LDFLAGS don't tell you to look there.
5031 - Be able to link with libevent as a shared library (the default
5032 after 1.0d), even if it's hiding in /usr/local/lib and even
5033 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
5034 assuming you're running gcc. Otherwise fail and give a useful
5036 - Fix a bug in the RPM packager: set home directory for _tor to
5037 something more reasonable when first installing.
5038 - Free a minor amount of memory that is still reachable on exit.
5041 Changes in version 0.1.0.6-rc - 2005-05-14
5043 - Implement --disable-threads configure option. Disable threads on
5044 netbsd by default, because it appears to have no reentrant resolver
5046 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
5047 release (1.1) detects and disables kqueue if it's broken.
5048 - Append default exit policy before checking for implicit internal
5049 addresses. Now we don't log a bunch of complaints on startup
5050 when using the default exit policy.
5051 - Some people were putting "Address " in their torrc, and they had
5052 a buggy resolver that resolved " " to 0.0.0.0. Oops.
5053 - If DataDir is ~/.tor, and that expands to /.tor, then default to
5054 LOCALSTATEDIR/tor instead.
5055 - Fix fragmented-message bug in TorControl.py.
5056 - Resolve a minor bug which would prevent unreachable dirports
5057 from getting suppressed in the published descriptor.
5058 - When the controller gave us a new descriptor, we weren't resolving
5059 it immediately, so Tor would think its address was 0.0.0.0 until
5060 we fetched a new directory.
5061 - Fix an uppercase/lowercase case error in suppressing a bogus
5062 libevent warning on some Linuxes.
5065 - Begin scrubbing sensitive strings from logs by default. Turn off
5066 the config option SafeLogging if you need to do debugging.
5067 - Switch to a new buffer management algorithm, which tries to avoid
5068 reallocing and copying quite as much. In first tests it looks like
5069 it uses *more* memory on average, but less cpu.
5070 - First cut at support for "create-fast" cells. Clients can use
5071 these when extending to their first hop, since the TLS already
5072 provides forward secrecy and authentication. Not enabled on
5074 - When dirservers refuse a router descriptor, we now log its
5075 contactinfo, platform, and the poster's IP address.
5076 - Call tor_free_all instead of connections_free_all after forking, to
5077 save memory on systems that need to fork.
5078 - Whine at you if you're a server and you don't set your contactinfo.
5079 - Implement --verify-config command-line option to check if your torrc
5080 is valid without actually launching Tor.
5081 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
5082 rather than just rejecting it.
5085 Changes in version 0.1.0.5-rc - 2005-04-27
5087 - Stop trying to print a null pointer if an OR conn fails because
5088 we didn't like its cert.
5090 - Switch our internal buffers implementation to use a ring buffer,
5091 to hopefully improve performance for fast servers a lot.
5092 - Add HttpsProxyAuthenticator support (basic auth only), based
5093 on patch from Adam Langley.
5094 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
5095 the fast servers that have been joining lately.
5096 - Give hidden service accesses extra time on the first attempt,
5097 since 60 seconds is often only barely enough. This might improve
5099 - Improve performance for dirservers: stop re-parsing the whole
5100 directory every time you regenerate it.
5101 - Add more debugging info to help us find the weird dns freebsd
5102 pthreads bug; cleaner debug messages to help track future issues.
5105 Changes in version 0.0.9.9 - 2005-04-23
5106 o Bugfixes on 0.0.9.x:
5107 - If unofficial Tor clients connect and send weird TLS certs, our
5108 Tor server triggers an assert. This release contains a minimal
5109 backport from the broader fix that we put into 0.1.0.4-rc.
5112 Changes in version 0.1.0.4-rc - 2005-04-23
5114 - If unofficial Tor clients connect and send weird TLS certs, our
5115 Tor server triggers an assert. Stop asserting, and start handling
5116 TLS errors better in other situations too.
5117 - When the controller asks us to tell it about all the debug-level
5118 logs, it turns out we were generating debug-level logs while
5119 telling it about them, which turns into a bad loop. Now keep
5120 track of whether you're sending a debug log to the controller,
5121 and don't log when you are.
5122 - Fix the "postdescriptor" feature of the controller interface: on
5123 non-complete success, only say "done" once.
5125 - Clients are now willing to load balance over up to 2mB, not 1mB,
5126 of advertised bandwidth capacity.
5127 - Add a NoPublish config option, so you can be a server (e.g. for
5128 testing running Tor servers in other Tor networks) without
5129 publishing your descriptor to the primary dirservers.
5132 Changes in version 0.1.0.3-rc - 2005-04-08
5133 o Improvements on 0.1.0.2-rc:
5134 - Client now retries when streams end early for 'hibernating' or
5135 'resource limit' reasons, rather than failing them.
5136 - More automated handling for dirserver operators:
5137 - Automatically approve nodes running 0.1.0.2-rc or later,
5138 now that the the reachability detection stuff is working.
5139 - Now we allow two unverified servers with the same nickname
5140 but different keys. But if a nickname is verified, only that
5141 nickname+key are allowed.
5142 - If you're an authdirserver connecting to an address:port,
5143 and it's not the OR you were expecting, forget about that
5144 descriptor. If he *was* the one you were expecting, then forget
5145 about all other descriptors for that address:port.
5146 - Allow servers to publish descriptors from 12 hours in the future.
5147 Corollary: only whine about clock skew from the dirserver if
5148 he's a trusted dirserver (since now even verified servers could
5149 have quite wrong clocks).
5150 - Adjust maximum skew and age for rendezvous descriptors: let skew
5151 be 48 hours rather than 90 minutes.
5152 - Efficiency improvements:
5153 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
5154 it much faster to look up a circuit for each relay cell.
5155 - Remove most calls to assert_all_pending_dns_resolves_ok(),
5156 since they're eating our cpu on exit nodes.
5157 - Stop wasting time doing a case insensitive comparison for every
5158 dns name every time we do any lookup. Canonicalize the names to
5159 lowercase and be done with it.
5160 - Start sending 'truncated' cells back rather than destroy cells,
5161 if the circuit closes in front of you. This means we won't have
5162 to abandon partially built circuits.
5163 - Only warn once per nickname from add_nickname_list_to_smartlist
5164 per failure, so an entrynode or exitnode choice that's down won't
5166 - Put a note in the torrc about abuse potential with the default
5168 - Revise control spec and implementation to allow all log messages to
5169 be sent to controller with their severities intact (suggested by
5170 Matt Edman). Update TorControl to handle new log event types.
5171 - Provide better explanation messages when controller's POSTDESCRIPTOR
5173 - Stop putting nodename in the Platform string in server descriptors.
5174 It doesn't actually help, and it is confusing/upsetting some people.
5176 o Bugfixes on 0.1.0.2-rc:
5177 - We were printing the host mask wrong in exit policies in server
5178 descriptors. This isn't a critical bug though, since we were still
5179 obeying the exit policy internally.
5180 - Fix Tor when compiled with libevent but without pthreads: move
5181 connection_unregister() from _connection_free() to
5183 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
5184 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
5185 when we look through the connection array, we'll find any of the
5186 cpu/dnsworkers. This is no good.
5188 o Bugfixes on 0.0.9.8:
5189 - Fix possible bug on threading platforms (e.g. win32) which was
5190 leaking a file descriptor whenever a cpuworker or dnsworker died.
5191 - When using preferred entry or exit nodes, ignore whether the
5192 circuit wants uptime or capacity. They asked for the nodes, they
5194 - chdir() to your datadirectory at the *end* of the daemonize process,
5195 not the beginning. This was a problem because the first time you
5196 run tor, if your datadir isn't there, and you have runasdaemon set
5197 to 1, it will try to chdir to it before it tries to create it. Oops.
5198 - Handle changed router status correctly when dirserver reloads
5199 fingerprint file. We used to be dropping all unverified descriptors
5200 right then. The bug was hidden because we would immediately
5201 fetch a directory from another dirserver, which would include the
5202 descriptors we just dropped.
5203 - When we're connecting to an OR and he's got a different nickname/key
5204 than we were expecting, only complain loudly if we're an OP or a
5205 dirserver. Complaining loudly to the OR admins just confuses them.
5206 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
5207 artificially capped at 500kB.
5210 Changes in version 0.0.9.8 - 2005-04-07
5211 o Bugfixes on 0.0.9.x:
5212 - We have a bug that I haven't found yet. Sometimes, very rarely,
5213 cpuworkers get stuck in the 'busy' state, even though the cpuworker
5214 thinks of itself as idle. This meant that no new circuits ever got
5215 established. Here's a workaround to kill any cpuworker that's been
5216 busy for more than 100 seconds.
5219 Changes in version 0.1.0.2-rc - 2005-04-01
5220 o Bugfixes on 0.1.0.1-rc:
5221 - Fixes on reachability detection:
5222 - Don't check for reachability while hibernating.
5223 - If ORPort is reachable but DirPort isn't, still publish the
5224 descriptor, but zero out DirPort until it's found reachable.
5225 - When building testing circs for ORPort testing, use only
5226 high-bandwidth nodes, so fewer circuits fail.
5227 - Complain about unreachable ORPort separately from unreachable
5228 DirPort, so the user knows what's going on.
5229 - Make sure we only conclude ORPort reachability if we didn't
5230 initiate the conn. Otherwise we could falsely conclude that
5231 we're reachable just because we connected to the guy earlier
5232 and he used that same pipe to extend to us.
5233 - Authdirservers shouldn't do ORPort reachability detection,
5234 since they're in clique mode, so it will be rare to find a
5235 server not already connected to them.
5236 - When building testing circuits, always pick middle hops running
5237 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
5238 bug. (This is a kludge; it will go away when 0.0.9.x becomes
5240 - When we decide we're reachable, actually publish our descriptor
5242 - Fix bug in redirectstream in the controller.
5243 - Fix the state descriptor strings so logs don't claim edge streams
5244 are in a different state than they actually are.
5245 - Use recent libevent features when possible (this only really affects
5246 win32 and osx right now, because the new libevent with these
5247 features hasn't been released yet). Add code to suppress spurious
5249 - Prevent possible segfault in connection_close_unattached_ap().
5250 - Fix newlines on torrc in win32.
5251 - Improve error msgs when tor-resolve fails.
5253 o Improvements on 0.0.9.x:
5254 - New experimental script tor/contrib/ExerciseServer.py (needs more
5255 work) that uses the controller interface to build circuits and
5256 fetch pages over them. This will help us bootstrap servers that
5257 have lots of capacity but haven't noticed it yet.
5258 - New experimental script tor/contrib/PathDemo.py (needs more work)
5259 that uses the controller interface to let you choose whole paths
5261 "<hostname>.<path,separated by dots>.<length of path>.path"
5262 - When we've connected to an OR and handshaked but didn't like
5263 the result, we were closing the conn without sending destroy
5264 cells back for pending circuits. Now send those destroys.
5267 Changes in version 0.0.9.7 - 2005-04-01
5268 o Bugfixes on 0.0.9.x:
5269 - Fix another race crash bug (thanks to Glenn Fink for reporting).
5270 - Compare identity to identity, not to nickname, when extending to
5271 a router not already in the directory. This was preventing us from
5272 extending to unknown routers. Oops.
5273 - Make sure to create OS X Tor user in <500 range, so we aren't
5274 creating actual system users.
5275 - Note where connection-that-hasn't-sent-end was marked, and fix
5276 a few really loud instances of this harmless bug (it's fixed more
5280 Changes in version 0.1.0.1-rc - 2005-03-28
5282 - Add reachability testing. Your Tor server will automatically try
5283 to see if its ORPort and DirPort are reachable from the outside,
5284 and it won't upload its descriptor until it decides they are.
5285 - Handle unavailable hidden services better. Handle slow or busy
5286 hidden services better.
5287 - Add support for CONNECTing through https proxies, with "HttpsProxy"
5289 - New exit policy: accept most low-numbered ports, rather than
5290 rejecting most low-numbered ports.
5291 - More Tor controller support (still experimental). See
5292 http://tor.eff.org/doc/control-spec.txt for all the new features,
5293 including signals to emulate unix signals from any platform;
5294 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
5295 closestream; closecircuit; etc.
5296 - Make nt services work and start on startup on win32 (based on
5297 patch by Matt Edman).
5298 - Add a new AddressMap config directive to rewrite incoming socks
5299 addresses. This lets you, for example, declare an implicit
5300 required exit node for certain sites.
5301 - Add a new TrackHostExits config directive to trigger addressmaps
5302 for certain incoming socks addresses -- for sites that break when
5303 your exit keeps changing (based on patch by Mike Perry).
5304 - Redo the client-side dns cache so it's just an addressmap too.
5305 - Notice when our IP changes, and reset stats/uptime/reachability.
5306 - When an application is using socks5, give him the whole variety of
5307 potential socks5 responses (connect refused, host unreachable, etc),
5308 rather than just "success" or "failure".
5309 - A more sane version numbering system. See
5310 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
5311 - New contributed script "exitlist": a simple python script to
5312 parse directories and find Tor nodes that exit to listed
5314 - New contributed script "privoxy-tor-toggle" to toggle whether
5315 Privoxy uses Tor. Seems to be configured for Debian by default.
5316 - Report HTTP reasons to client when getting a response from directory
5317 servers -- so you can actually know what went wrong.
5318 - New config option MaxAdvertisedBandwidth which lets you advertise
5319 a low bandwidthrate (to not attract as many circuits) while still
5320 allowing a higher bandwidthrate in reality.
5322 o Robustness/stability fixes:
5323 - Make Tor use Niels Provos's libevent instead of its current
5324 poll-but-sometimes-select mess. This will let us use faster async
5325 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
5327 - pthread support now too. This was forced because when we forked,
5328 we ended up wasting a lot of duplicate ram over time. Also switch
5329 to foo_r versions of some library calls to allow reentry and
5331 - Better handling for heterogeneous / unreliable nodes:
5332 - Annotate circuits w/ whether they aim to contain high uptime nodes
5333 and/or high capacity nodes. When building circuits, choose
5335 - This means that every single node in an intro rend circuit,
5336 not just the last one, will have a minimum uptime.
5337 - New config option LongLivedPorts to indicate application streams
5338 that will want high uptime circuits.
5339 - Servers reset uptime when a dir fetch entirely fails. This
5340 hopefully reflects stability of the server's network connectivity.
5341 - If somebody starts his tor server in Jan 2004 and then fixes his
5342 clock, don't make his published uptime be a year.
5343 - Reset published uptime when you wake up from hibernation.
5344 - Introduce a notion of 'internal' circs, which are chosen without
5345 regard to the exit policy of the last hop. Intro and rendezvous
5346 circs must be internal circs, to avoid leaking information. Resolve
5347 and connect streams can use internal circs if they want.
5348 - New circuit pooling algorithm: make sure to have enough circs around
5349 to satisfy any predicted ports, and also make sure to have 2 internal
5350 circs around if we've required internal circs lately (and with high
5351 uptime if we've seen that lately too).
5352 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
5353 which describes how often we retry making new circuits if current
5354 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
5355 how long we're willing to make use of an already-dirty circuit.
5356 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
5357 circ as necessary, if there are any completed ones lying around
5358 when we try to launch one.
5359 - Make hidden services try to establish a rendezvous for 30 seconds,
5360 rather than for n (where n=3) attempts to build a circuit.
5361 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
5362 "ShutdownWaitLength".
5363 - Try to be more zealous about calling connection_edge_end when
5364 things go bad with edge conns in connection.c.
5365 - Revise tor-spec to add more/better stream end reasons.
5366 - Revise all calls to connection_edge_end to avoid sending "misc",
5367 and to take errno into account where possible.
5370 - Fix a race condition that can trigger an assert, when we have a
5371 pending create cell and an OR connection fails right then.
5372 - Fix several double-mark-for-close bugs, e.g. where we were finding
5373 a conn for a cell even if that conn is already marked for close.
5374 - Make sequence of log messages when starting on win32 with no config
5375 file more reasonable.
5376 - When choosing an exit node for a new non-internal circ, don't take
5377 into account whether it'll be useful for any pending x.onion
5378 addresses -- it won't.
5379 - Turn addr_policy_compare from a tristate to a quadstate; this should
5380 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
5381 for google.com" problem.
5382 - Make "platform" string in descriptor more accurate for Win32 servers,
5383 so it's not just "unknown platform".
5384 - Fix an edge case in parsing config options (thanks weasel).
5385 If they say "--" on the commandline, it's not an option.
5386 - Reject odd-looking addresses at the client (e.g. addresses that
5387 contain a colon), rather than having the server drop them because
5389 - tor-resolve requests were ignoring .exit if there was a working circuit
5390 they could use instead.
5391 - REUSEADDR on normal platforms means you can rebind to the port
5392 right after somebody else has let it go. But REUSEADDR on win32
5393 means to let you bind to the port _even when somebody else
5394 already has it bound_! So, don't do that on Win32.
5395 - Change version parsing logic: a version is "obsolete" if it is not
5396 recommended and (1) there is a newer recommended version in the
5397 same series, or (2) there are no recommended versions in the same
5398 series, but there are some recommended versions in a newer series.
5399 A version is "new" if it is newer than any recommended version in
5401 - Stop most cases of hanging up on a socks connection without sending
5405 - Require BandwidthRate to be at least 20kB/s for servers.
5406 - When a dirserver causes you to give a warn, mention which dirserver
5408 - New config option DirAllowPrivateAddresses for authdirservers.
5409 Now by default they refuse router descriptors that have non-IP or
5410 private-IP addresses.
5411 - Stop publishing socksport in the directory, since it's not
5412 actually meant to be public. For compatibility, publish a 0 there
5414 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
5415 smart" value, that is low for servers and high for clients.
5416 - If our clock jumps forward by 100 seconds or more, assume something
5417 has gone wrong with our network and abandon all not-yet-used circs.
5418 - Warn when exit policy implicitly allows local addresses.
5419 - If we get an incredibly skewed timestamp from a dirserver mirror
5420 that isn't a verified OR, don't warn -- it's probably him that's
5422 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
5423 cookies to disk and doesn't log each web request to disk. (Thanks
5424 to Brett Carrington for pointing this out.)
5425 - When a client asks us for a dir mirror and we don't have one,
5426 launch an attempt to get a fresh one.
5427 - If we're hibernating and we get a SIGINT, exit immediately.
5428 - Add --with-dmalloc ./configure option, to track memory leaks.
5429 - And try to free all memory on closing, so we can detect what
5431 - Cache local dns resolves correctly even when they're .exit
5433 - Give a better warning when some other server advertises an
5434 ORPort that is actually an apache running ssl.
5435 - Add "opt hibernating 1" to server descriptor to make it clearer
5436 whether the server is hibernating.
5439 Changes in version 0.0.9.6 - 2005-03-24
5440 o Bugfixes on 0.0.9.x (crashes and asserts):
5441 - Add new end stream reasons to maintainance branch. Fix bug where
5442 reason (8) could trigger an assert. Prevent bug from recurring.
5443 - Apparently win32 stat wants paths to not end with a slash.
5444 - Fix assert triggers in assert_cpath_layer_ok(), where we were
5445 blowing away the circuit that conn->cpath_layer points to, then
5446 checking to see if the circ is well-formed. Backport check to make
5447 sure we dont use the cpath on a closed connection.
5448 - Prevent circuit_resume_edge_reading_helper() from trying to package
5449 inbufs for marked-for-close streams.
5450 - Don't crash on hup if your options->address has become unresolvable.
5451 - Some systems (like OS X) sometimes accept() a connection and tell
5452 you the remote host is 0.0.0.0:0. If this happens, due to some
5453 other mis-features, we get confused; so refuse the conn for now.
5455 o Bugfixes on 0.0.9.x (other):
5456 - Fix harmless but scary "Unrecognized content encoding" warn message.
5457 - Add new stream error reason: TORPROTOCOL reason means "you are not
5458 speaking a version of Tor I understand; say bye-bye to your stream."
5459 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
5460 into the future, now that we are more tolerant of skew. This
5461 resolves a bug where a Tor server would refuse to cache a directory
5462 because all the directories it gets are too far in the future;
5463 yet the Tor server never logs any complaints about clock skew.
5464 - Mac packaging magic: make man pages useable, and do not overwrite
5465 existing torrc files.
5466 - Make OS X log happily to /var/log/tor/tor.log
5469 Changes in version 0.0.9.5 - 2005-02-22
5470 o Bugfixes on 0.0.9.x:
5471 - Fix an assert race at exit nodes when resolve requests fail.
5472 - Stop picking unverified dir mirrors--it only leads to misery.
5473 - Patch from Matt Edman to make NT services work better. Service
5474 support is still not compiled into the executable by default.
5475 - Patch from Dmitri Bely so the Tor service runs better under
5476 the win32 SYSTEM account.
5477 - Make tor-resolve actually work (?) on Win32.
5478 - Fix a sign bug when getrlimit claims to have 4+ billion
5479 file descriptors available.
5480 - Stop refusing to start when bandwidthburst == bandwidthrate.
5481 - When create cells have been on the onion queue more than five
5482 seconds, just send back a destroy and take them off the list.
5485 Changes in version 0.0.9.4 - 2005-02-03
5486 o Bugfixes on 0.0.9:
5487 - Fix an assert bug that took down most of our servers: when
5488 a server claims to have 1 GB of bandwidthburst, don't
5490 - Don't crash as badly if we have spawned the max allowed number
5491 of dnsworkers, or we're out of file descriptors.
5492 - Block more file-sharing ports in the default exit policy.
5493 - MaxConn is now automatically set to the hard limit of max
5494 file descriptors we're allowed (ulimit -n), minus a few for
5496 - Give a clearer message when servers need to raise their
5497 ulimit -n when they start running out of file descriptors.
5498 - SGI Compatibility patches from Jan Schaumann.
5499 - Tolerate a corrupt cached directory better.
5500 - When a dirserver hasn't approved your server, list which one.
5501 - Go into soft hibernation after 95% of the bandwidth is used,
5502 not 99%. This is especially important for daily hibernators who
5503 have a small accounting max. Hopefully it will result in fewer
5504 cut connections when the hard hibernation starts.
5505 - Load-balance better when using servers that claim more than
5506 800kB/s of capacity.
5507 - Make NT services work (experimental, only used if compiled in).
5510 Changes in version 0.0.9.3 - 2005-01-21
5511 o Bugfixes on 0.0.9:
5512 - Backport the cpu use fixes from main branch, so busy servers won't
5513 need as much processor time.
5514 - Work better when we go offline and then come back, or when we
5515 run Tor at boot before the network is up. We do this by
5516 optimistically trying to fetch a new directory whenever an
5517 application request comes in and we think we're offline -- the
5518 human is hopefully a good measure of when the network is back.
5519 - Backport some minimal hidserv bugfixes: keep rend circuits open as
5520 long as you keep using them; actually publish hidserv descriptors
5521 shortly after they change, rather than waiting 20-40 minutes.
5522 - Enable Mac startup script by default.
5523 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
5524 - When you update AllowUnverifiedNodes or FirewallPorts via the
5525 controller's setconf feature, we were always appending, never
5527 - When you update HiddenServiceDir via setconf, it was screwing up
5528 the order of reading the lines, making it fail.
5529 - Do not rewrite a cached directory back to the cache; otherwise we
5530 will think it is recent and not fetch a newer one on startup.
5531 - Workaround for webservers that lie about Content-Encoding: Tor
5532 now tries to autodetect compressed directories and compression
5533 itself. This lets us Proxypass dir fetches through apache.
5536 Changes in version 0.0.9.2 - 2005-01-04
5537 o Bugfixes on 0.0.9 (crashes and asserts):
5538 - Fix an assert on startup when the disk is full and you're logging
5540 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
5541 style address, then we'd crash.
5542 - Fix an assert trigger when the running-routers string we get from
5543 a dirserver is broken.
5544 - Make worker threads start and run on win32. Now win32 servers
5546 - Bandaid (not actually fix, but now it doesn't crash) an assert
5547 where the dns worker dies mysteriously and the main Tor process
5548 doesn't remember anything about the address it was resolving.
5550 o Bugfixes on 0.0.9 (Win32):
5551 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
5552 name out of the warning/assert messages.
5553 - Fix a superficial "unhandled error on read" bug on win32.
5554 - The win32 installer no longer requires a click-through for our
5555 license, since our Free Software license grants rights but does not
5557 - Win32: When connecting to a dirserver fails, try another one
5558 immediately. (This was already working for non-win32 Tors.)
5559 - Stop trying to parse $HOME on win32 when hunting for default
5561 - Make tor-resolve.c work on win32 by calling network_init().
5563 o Bugfixes on 0.0.9 (other):
5564 - Make 0.0.9.x build on Solaris again.
5565 - Due to a fencepost error, we were blowing away the \n when reporting
5566 confvalue items in the controller. So asking for multiple config
5567 values at once couldn't work.
5568 - When listing circuits that are pending on an opening OR connection,
5569 if we're an OR we were listing circuits that *end* at us as
5570 being pending on every listener, dns/cpu worker, etc. Stop that.
5571 - Dirservers were failing to create 'running-routers' or 'directory'
5572 strings if we had more than some threshold of routers. Fix them so
5573 they can handle any number of routers.
5574 - Fix a superficial "Duplicate mark for close" bug.
5575 - Stop checking for clock skew for OR connections, even for servers.
5576 - Fix a fencepost error that was chopping off the last letter of any
5577 nickname that is the maximum allowed nickname length.
5578 - Update URLs in log messages so they point to the new website.
5579 - Fix a potential problem in mangling server private keys while
5580 writing to disk (not triggered yet, as far as we know).
5581 - Include the licenses for other free software we include in Tor,
5582 now that we're shipping binary distributions more regularly.
5585 Changes in version 0.0.9.1 - 2004-12-15
5586 o Bugfixes on 0.0.9:
5587 - Make hibernation actually work.
5588 - Make HashedControlPassword config option work.
5589 - When we're reporting event circuit status to a controller,
5590 don't use the stream status code.
5593 Changes in version 0.0.9 - 2004-12-12
5595 - Clean up manpage and torrc.sample file.
5596 - Clean up severities and text of log warnings.
5598 - Make servers trigger an assert when they enter hibernation.
5601 Changes in version 0.0.9rc7 - 2004-12-08
5602 o Bugfixes on 0.0.9rc:
5603 - Fix a stack-trashing crash when an exit node begins hibernating.
5604 - Avoid looking at unallocated memory while considering which
5605 ports we need to build circuits to cover.
5606 - Stop a sigpipe: when an 'end' cell races with eof from the app,
5607 we shouldn't hold-open-until-flush if the eof arrived first.
5608 - Fix a bug with init_cookie_authentication() in the controller.
5609 - When recommending new-format log lines, if the upper bound is
5610 LOG_ERR, leave it implicit.
5612 o Bugfixes on 0.0.8.1:
5613 - Fix a whole slew of memory leaks.
5614 - Fix isspace() and friends so they still make Solaris happy
5615 but also so they don't trigger asserts on win32.
5616 - Fix parse_iso_time on platforms without strptime (eg win32).
5617 - win32: tolerate extra "readable" events better.
5618 - win32: when being multithreaded, leave parent fdarray open.
5619 - Make unit tests work on win32.
5622 Changes in version 0.0.9rc6 - 2004-12-06
5623 o Bugfixes on 0.0.9pre:
5624 - Clean up some more integer underflow opportunities (not exploitable
5626 - While hibernating, hup should not regrow our listeners.
5627 - Send an end to the streams we close when we hibernate, rather
5628 than just chopping them off.
5629 - React to eof immediately on non-open edge connections.
5631 o Bugfixes on 0.0.8.1:
5632 - Calculate timeout for waiting for a connected cell from the time
5633 we sent the begin cell, not from the time the stream started. If
5634 it took a long time to establish the circuit, we would time out
5635 right after sending the begin cell.
5636 - Fix router_compare_addr_to_addr_policy: it was not treating a port
5637 of * as always matching, so we were picking reject *:* nodes as
5638 exit nodes too. Oops.
5641 - New circuit building strategy: keep a list of ports that we've
5642 used in the past 6 hours, and always try to have 2 circuits open
5643 or on the way that will handle each such port. Seed us with port
5644 80 so web users won't complain that Tor is "slow to start up".
5645 - Make kill -USR1 dump more useful stats about circuits.
5646 - When warning about retrying or giving up, print the address, so
5647 the user knows which one it's talking about.
5648 - If you haven't used a clean circuit in an hour, throw it away,
5649 just to be on the safe side. (This means after 6 hours a totally
5650 unused Tor client will have no circuits open.)
5653 Changes in version 0.0.9rc5 - 2004-12-01
5654 o Bugfixes on 0.0.8.1:
5655 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
5656 - Let resolve conns retry/expire also, rather than sticking around
5658 - If we are using select, make sure we stay within FD_SETSIZE.
5660 o Bugfixes on 0.0.9pre:
5661 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
5662 but doesn't seem to be currently; thanks to Ilja van Sprundel for
5664 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
5665 instead. Impose minima and maxima for all *Period options; impose
5666 even tighter maxima for fetching if we are a caching dirserver.
5667 Clip rather than rejecting.
5668 - Fetch cached running-routers from servers that serve it (that is,
5669 authdirservers and servers running 0.0.9rc5-cvs or later.)
5672 - Accept *:706 (silc) in default exit policy.
5673 - Implement new versioning format for post 0.1.
5674 - Support "foo.nickname.exit" addresses, to let Alice request the
5675 address "foo" as viewed by exit node "nickname". Based on a patch
5677 - Make tor --version --version dump the cvs Id of every file.
5680 Changes in version 0.0.9rc4 - 2004-11-28
5681 o Bugfixes on 0.0.8.1:
5682 - Make windows sockets actually non-blocking (oops), and handle
5683 win32 socket errors better.
5685 o Bugfixes on 0.0.9rc1:
5686 - Actually catch the -USR2 signal.
5689 Changes in version 0.0.9rc3 - 2004-11-25
5690 o Bugfixes on 0.0.8.1:
5691 - Flush the log file descriptor after we print "Tor opening log file",
5692 so we don't see those messages days later.
5694 o Bugfixes on 0.0.9rc1:
5695 - Make tor-resolve work again.
5696 - Avoid infinite loop in tor-resolve if tor hangs up on it.
5697 - Fix an assert trigger for clients/servers handling resolves.
5700 Changes in version 0.0.9rc2 - 2004-11-24
5701 o Bugfixes on 0.0.9rc1:
5702 - I broke socks5 support while fixing the eof bug.
5703 - Allow unitless bandwidths and intervals; they default to bytes
5705 - New servers don't start out hibernating; they are active until
5706 they run out of bytes, so they have a better estimate of how
5707 long it takes, and so their operators can know they're working.
5710 Changes in version 0.0.9rc1 - 2004-11-23
5711 o Bugfixes on 0.0.8.1:
5712 - Finally fix a bug that's been plaguing us for a year:
5713 With high load, circuit package window was reaching 0. Whenever
5714 we got a circuit-level sendme, we were reading a lot on each
5715 socket, but only writing out a bit. So we would eventually reach
5716 eof. This would be noticed and acted on even when there were still
5717 bytes sitting in the inbuf.
5718 - When poll() is interrupted, we shouldn't believe the revents values.
5720 o Bugfixes on 0.0.9pre6:
5721 - Fix hibernate bug that caused pre6 to be broken.
5722 - Don't keep rephist info for routers that haven't had activity for
5723 24 hours. (This matters now that clients have keys, since we track
5725 - Never call close_temp_logs while validating log options.
5726 - Fix backslash-escaping on tor.sh.in and torctl.in.
5729 - Implement weekly/monthly/daily accounting: now you specify your
5730 hibernation properties by
5731 AccountingMax N bytes|KB|MB|GB|TB
5732 AccountingStart day|week|month [day] HH:MM
5733 Defaults to "month 1 0:00".
5734 - Let bandwidth and interval config options be specified as 5 bytes,
5735 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
5736 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
5737 get back to normal.)
5738 - If your requested entry or exit node has advertised bandwidth 0,
5740 - Be more greedy about filling up relay cells -- we try reading again
5741 once we've processed the stuff we read, in case enough has arrived
5742 to fill the last cell completely.
5743 - Apply NT service patch from Osamu Fujino. Still needs more work.
5746 Changes in version 0.0.9pre6 - 2004-11-15
5747 o Bugfixes on 0.0.8.1:
5748 - Fix assert failure on malformed socks4a requests.
5749 - Use identity comparison, not nickname comparison, to choose which
5750 half of circuit-ID-space each side gets to use. This is needed
5751 because sometimes we think of a router as a nickname, and sometimes
5752 as a hex ID, and we can't predict what the other side will do.
5753 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
5754 write() call will fail and we handle it there.
5755 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
5756 and smartlist_len, which are two major profiling offenders.
5758 o Bugfixes on 0.0.9pre5:
5759 - Fix a bug in read_all that was corrupting config files on windows.
5760 - When we're raising the max number of open file descriptors to
5761 'unlimited', don't log that we just raised it to '-1'.
5762 - Include event code with events, as required by control-spec.txt.
5763 - Don't give a fingerprint when clients do --list-fingerprint:
5764 it's misleading, because it will never be the same again.
5765 - Stop using strlcpy in tor_strndup, since it was slowing us
5767 - Remove warn on startup about missing cached-directory file.
5768 - Make kill -USR1 work again.
5769 - Hibernate if we start tor during the "wait for wakeup-time" phase
5770 of an accounting interval. Log our hibernation plans better.
5771 - Authoritative dirservers now also cache their directory, so they
5772 have it on start-up.
5775 - Fetch running-routers; cache running-routers; compress
5776 running-routers; serve compressed running-routers.z
5777 - Add NSI installer script contributed by J Doe.
5778 - Commit VC6 and VC7 workspace/project files.
5779 - Commit a tor.spec for making RPM files, with help from jbash.
5780 - Add contrib/torctl.in contributed by Glenn Fink.
5781 - Implement the control-spec's SAVECONF command, to write your
5782 configuration to torrc.
5783 - Get cookie authentication for the controller closer to working.
5784 - Include control-spec.txt in the tarball.
5785 - When set_conf changes our server descriptor, upload a new copy.
5786 But don't upload it too often if there are frequent changes.
5787 - Document authentication config in man page, and document signals
5789 - Clean up confusing parts of man page and torrc.sample.
5790 - Make expand_filename handle ~ and ~username.
5791 - Use autoconf to enable largefile support where necessary. Use
5792 ftello where available, since ftell can fail at 2GB.
5793 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
5794 log more informatively.
5795 - Give a slightly more useful output for "tor -h".
5796 - Refuse application socks connections to port 0.
5797 - Check clock skew for verified servers, but allow unverified
5798 servers and clients to have any clock skew.
5799 - Break DirFetchPostPeriod into:
5800 - DirFetchPeriod for fetching full directory,
5801 - StatusFetchPeriod for fetching running-routers,
5802 - DirPostPeriod for posting server descriptor,
5803 - RendPostPeriod for posting hidden service descriptors.
5804 - Make sure the hidden service descriptors are at a random offset
5805 from each other, to hinder linkability.
5808 Changes in version 0.0.9pre5 - 2004-11-09
5809 o Bugfixes on 0.0.9pre4:
5810 - Fix a seg fault in unit tests (doesn't affect main program).
5811 - Fix an assert bug where a hidden service provider would fail if
5812 the first hop of his rendezvous circuit was down.
5813 - Hidden service operators now correctly handle version 1 style
5814 INTRODUCE1 cells (nobody generates them still, so not a critical
5816 - If do_hup fails, actually notice.
5817 - Handle more errnos from accept() without closing the listener.
5818 Some OpenBSD machines were closing their listeners because
5819 they ran out of file descriptors.
5820 - Send resolve cells to exit routers that are running a new
5821 enough version of the resolve code to work right.
5822 - Better handling of winsock includes on non-MSV win32 compilers.
5823 - Some people had wrapped their tor client/server in a script
5824 that would restart it whenever it died. This did not play well
5825 with our "shut down if your version is obsolete" code. Now people
5826 don't fetch a new directory if their local cached version is
5828 - Make our autogen.sh work on ksh as well as bash.
5831 - Hibernation: New config option "AccountingMaxKB" lets you
5832 set how many KBytes per month you want to allow your server to
5833 consume. Rather than spreading those bytes out evenly over the
5834 month, we instead hibernate for some of the month and pop up
5835 at a deterministic time, work until the bytes are consumed, then
5836 hibernate again. Config option "MonthlyAccountingStart" lets you
5837 specify which day of the month your billing cycle starts on.
5838 - Control interface: a separate program can now talk to your
5839 client/server over a socket, and get/set config options, receive
5840 notifications of circuits and streams starting/finishing/dying,
5841 bandwidth used, etc. The next step is to get some GUIs working.
5842 Let us know if you want to help out. See doc/control-spec.txt .
5843 - Ship a contrib/tor-control.py as an example script to interact
5844 with the control port.
5845 - "tor --hash-password zzyxz" will output a salted password for
5846 use in authenticating to the control interface.
5847 - New log format in config:
5848 "Log minsev[-maxsev] stdout|stderr|syslog" or
5849 "Log minsev[-maxsev] file /var/foo"
5852 - DirPolicy config option, to let people reject incoming addresses
5853 from their dirserver.
5854 - "tor --list-fingerprint" will list your identity key fingerprint
5856 - Add "pass" target for RedirectExit, to make it easier to break
5857 out of a sequence of RedirectExit rules.
5858 - Clients now generate a TLS cert too, in preparation for having
5859 them act more like real nodes.
5860 - Ship src/win32/ in the tarball, so people can use it to build.
5861 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
5863 - New "router-status" line in directory, to better bind each verified
5864 nickname to its identity key.
5865 - Deprecate unofficial config option abbreviations, and abbreviations
5866 not on the command line.
5867 - Add a pure-C tor-resolve implementation.
5868 - Use getrlimit and friends to ensure we can reach MaxConn (currently
5869 1024) file descriptors.
5871 o Code security improvements, inspired by Ilja:
5872 - Replace sprintf with snprintf. (I think they were all safe, but
5874 - Replace strcpy/strncpy with strlcpy in more places.
5875 - Avoid strcat; use snprintf or strlcat instead.
5876 - snprintf wrapper with consistent (though not C99) overflow behavior.
5879 Changes in version 0.0.9pre4 - 2004-10-17
5880 o Bugfixes on 0.0.9pre3:
5881 - If the server doesn't specify an exit policy, use the real default
5882 exit policy, not reject *:*.
5883 - Ignore fascistfirewall when uploading/downloading hidden service
5884 descriptors, since we go through Tor for those; and when using
5885 an HttpProxy, since we assume it can reach them all.
5886 - When looking for an authoritative dirserver, use only the ones
5887 configured at boot. Don't bother looking in the directory.
5888 - The rest of the fix for get_default_conf_file() on older win32.
5889 - Make 'Routerfile' config option obsolete.
5892 - New 'MyFamily nick1,...' config option for a server to
5893 specify other servers that shouldn't be used in the same circuit
5894 with it. Only believed if nick1 also specifies us.
5895 - New 'NodeFamily nick1,nick2,...' config option for a client to
5896 specify nodes that it doesn't want to use in the same circuit.
5897 - New 'Redirectexit pattern address:port' config option for a
5898 server to redirect exit connections, e.g. to a local squid.
5901 Changes in version 0.0.9pre3 - 2004-10-13
5902 o Bugfixes on 0.0.8.1:
5903 - Better torrc example lines for dirbindaddress and orbindaddress.
5904 - Improved bounds checking on parsed ints (e.g. config options and
5905 the ones we find in directories.)
5906 - Better handling of size_t vs int, so we're more robust on 64
5908 - Fix the rest of the bug where a newly started OR would appear
5909 as unverified even after we've added his fingerprint and hupped
5911 - Fix a bug from 0.0.7: when read() failed on a stream, we would
5912 close it without sending back an end. So 'connection refused'
5913 would simply be ignored and the user would get no response.
5915 o Bugfixes on 0.0.9pre2:
5916 - Serving the cached-on-disk directory to people is bad. We now
5917 provide no directory until we've fetched a fresh one.
5918 - Workaround for bug on windows where cached-directories get crlf
5920 - Make get_default_conf_file() work on older windows too.
5921 - If we write a *:* exit policy line in the descriptor, don't write
5922 any more exit policy lines.
5925 - Use only 0.0.9pre1 and later servers for resolve cells.
5926 - Make the dirservers file obsolete.
5927 - Include a dir-signing-key token in directories to tell the
5928 parsing entity which key is being used to sign.
5929 - Remove the built-in bulky default dirservers string.
5930 - New config option "Dirserver %s:%d [fingerprint]", which can be
5931 repeated as many times as needed. If no dirservers specified,
5932 default to moria1,moria2,tor26.
5933 - Make moria2 advertise a dirport of 80, so people behind firewalls
5934 will be able to get a directory.
5935 - Http proxy support
5936 - Dirservers translate requests for http://%s:%d/x to /x
5937 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
5938 be routed through this host.
5939 - Clients ask for /tor/x rather than /x for new enough dirservers.
5940 This way we can one day coexist peacefully with apache.
5941 - Clients specify a "Host: %s%d" http header, to be compatible
5942 with more proxies, and so running squid on an exit node can work.
5945 Changes in version 0.0.8.1 - 2004-10-13
5947 - Fix a seg fault that can be triggered remotely for Tor
5948 clients/servers with an open dirport.
5949 - Fix a rare assert trigger, where routerinfos for entries in
5950 our cpath would expire while we're building the path.
5951 - Fix a bug in OutboundBindAddress so it (hopefully) works.
5952 - Fix a rare seg fault for people running hidden services on
5953 intermittent connections.
5954 - Fix a bug in parsing opt keywords with objects.
5955 - Fix a stale pointer assert bug when a stream detaches and
5957 - Fix a string format vulnerability (probably not exploitable)
5958 in reporting stats locally.
5959 - Fix an assert trigger: sometimes launching circuits can fail
5960 immediately, e.g. because too many circuits have failed recently.
5961 - Fix a compile warning on 64 bit platforms.
5964 Changes in version 0.0.9pre2 - 2004-10-03
5966 - Make fetching a cached directory work for 64-bit platforms too.
5967 - Make zlib.h a required header, not an optional header.
5970 Changes in version 0.0.9pre1 - 2004-10-01
5972 - Stop using separate defaults for no-config-file and
5973 empty-config-file. Now you have to explicitly turn off SocksPort,
5974 if you don't want it open.
5975 - Fix a bug in OutboundBindAddress so it (hopefully) works.
5976 - Improve man page to mention more of the 0.0.8 features.
5977 - Fix a rare seg fault for people running hidden services on
5978 intermittent connections.
5979 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
5981 - Fix more dns related bugs: send back resolve_failed and end cells
5982 more reliably when the resolve fails, rather than closing the
5983 circuit and then trying to send the cell. Also attach dummy resolve
5984 connections to a circuit *before* calling dns_resolve(), to fix
5985 a bug where cached answers would never be sent in RESOLVED cells.
5986 - When we run out of disk space, or other log writing error, don't
5987 crash. Just stop logging to that log and continue.
5988 - We were starting to daemonize before we opened our logs, so if
5989 there were any problems opening logs, we would complain to stderr,
5990 which wouldn't work, and then mysteriously exit.
5991 - Fix a rare bug where sometimes a verified OR would connect to us
5992 before he'd uploaded his descriptor, which would cause us to
5993 assign conn->nickname as though he's unverified. Now we look through
5994 the fingerprint list to see if he's there.
5995 - Fix a rare assert trigger, where routerinfos for entries in
5996 our cpath would expire while we're building the path.
5999 - Clients can ask dirservers for /dir.z to get a compressed version
6000 of the directory. Only works for servers running 0.0.9, of course.
6001 - Make clients cache directories and use them to seed their router
6002 lists at startup. This means clients have a datadir again.
6003 - Configuration infrastructure support for warning on obsolete
6005 - Respond to content-encoding headers by trying to uncompress as
6007 - Reply with a deflated directory when a client asks for "dir.z".
6008 We could use allow-encodings instead, but allow-encodings isn't
6009 specified in HTTP 1.0.
6010 - Raise the max dns workers from 50 to 100.
6011 - Discourage people from setting their dirfetchpostperiod more often
6012 than once per minute.
6013 - Protect dirservers from overzealous descriptor uploading -- wait
6014 10 seconds after directory gets dirty, before regenerating.
6017 Changes in version 0.0.8 - 2004-08-25
6018 o Port it to SunOS 5.9 / Athena
6021 Changes in version 0.0.8rc2 - 2004-08-20
6022 o Make it compile on cygwin again.
6023 o When picking unverified routers, skip those with low uptime and/or
6024 low bandwidth, depending on what properties you care about.
6027 Changes in version 0.0.8rc1 - 2004-08-18
6028 o Changes from 0.0.7.3:
6030 - Fix assert triggers: if the other side returns an address 0.0.0.0,
6031 don't put it into the client dns cache.
6032 - If a begin failed due to exit policy, but we believe the IP address
6033 should have been allowed, switch that router to exitpolicy reject *:*
6034 until we get our next directory.
6036 - Clients choose nodes proportional to advertised bandwidth.
6037 - Avoid using nodes with low uptime as introduction points.
6038 - Handle servers with dynamic IP addresses: don't replace
6039 options->Address with the resolved one at startup, and
6040 detect our address right before we make a routerinfo each time.
6041 - 'FascistFirewall' option to pick dirservers and ORs on specific
6042 ports; plus 'FirewallPorts' config option to tell FascistFirewall
6043 which ports are open. (Defaults to 80,443)
6044 - Be more aggressive about trying to make circuits when the network
6045 has changed (e.g. when you unsuspend your laptop).
6046 - Check for time skew on http headers; report date in response to
6048 - If the entrynode config line has only one node, don't pick it as
6050 - Add strict{entry|exit}nodes config options. If set to 1, then
6051 we refuse to build circuits that don't include the specified entry
6053 - OutboundBindAddress config option, to bind to a specific
6054 IP address for outgoing connect()s.
6055 - End truncated log entries (e.g. directories) with "[truncated]".
6057 o Patches to 0.0.8preX:
6059 - Patches to compile and run on win32 again (maybe)?
6060 - Fix crash when looking for ~/.torrc with no $HOME set.
6061 - Fix a race bug in the unit tests.
6062 - Handle verified/unverified name collisions better when new
6063 routerinfo's arrive in a directory.
6064 - Sometimes routers were getting entered into the stats before
6065 we'd assigned their identity_digest. Oops.
6066 - Only pick and establish intro points after we've gotten a
6069 - AllowUnverifiedNodes config option to let circuits choose no-name
6070 routers in entry,middle,exit,introduction,rendezvous positions.
6071 Allow middle and rendezvous positions by default.
6072 - Add a man page for tor-resolve.
6075 Changes in version 0.0.7.3 - 2004-08-12
6076 o Stop dnsworkers from triggering an assert failure when you
6077 ask them to resolve the host "".
6080 Changes in version 0.0.8pre3 - 2004-08-09
6081 o Changes from 0.0.7.2:
6082 - Allow multiple ORs with same nickname in routerlist -- now when
6083 people give us one identity key for a nickname, then later
6084 another, we don't constantly complain until the first expires.
6085 - Remember used bandwidth (both in and out), and publish 15-minute
6086 snapshots for the past day into our descriptor.
6087 - You can now fetch $DIRURL/running-routers to get just the
6088 running-routers line, not the whole descriptor list. (But
6089 clients don't use this yet.)
6090 - When people mistakenly use Tor as an http proxy, point them
6091 at the tor-doc.html rather than the INSTALL.
6092 - Remove our mostly unused -- and broken -- hex_encode()
6093 function. Use base16_encode() instead. (Thanks to Timo Lindfors
6094 for pointing out this bug.)
6095 - Rotate onion keys every 12 hours, not every 2 hours, so we have
6096 fewer problems with people using the wrong key.
6097 - Change the default exit policy to reject the default edonkey,
6098 kazaa, gnutella ports.
6099 - Add replace_file() to util.[ch] to handle win32's rename().
6101 o Changes from 0.0.8preX:
6102 - Fix two bugs in saving onion keys to disk when rotating, so
6103 hopefully we'll get fewer people using old onion keys.
6104 - Fix an assert error that was making SocksPolicy not work.
6105 - Be willing to expire routers that have an open dirport -- it's
6106 just the authoritative dirservers we want to not forget.
6107 - Reject tor-resolve requests for .onion addresses early, so we
6108 don't build a whole rendezvous circuit and then fail.
6109 - When you're warning a server that he's unverified, don't cry
6111 - Fix a race condition: don't try to extend onto a connection
6112 that's still handshaking.
6113 - For servers in clique mode, require the conn to be open before
6114 you'll choose it for your path.
6115 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
6116 end relay cell, etc.
6117 - Measure bandwidth capacity over the last 24 hours, not just 12
6118 - Bugfix: authoritative dirservers were making and signing a new
6119 directory for each client, rather than reusing the cached one.
6122 Changes in version 0.0.8pre2 - 2004-08-04
6123 o Changes from 0.0.7.2:
6125 - Check directory signature _before_ you decide whether you're
6126 you're running an obsolete version and should exit.
6127 - Check directory signature _before_ you parse the running-routers
6128 list to decide who's running or verified.
6129 - Bugfixes and features:
6130 - Check return value of fclose while writing to disk, so we don't
6131 end up with broken files when servers run out of disk space.
6132 - Log a warning if the user uses an unsafe socks variant, so people
6133 are more likely to learn about privoxy or socat.
6134 - Dirservers now include RFC1123-style dates in the HTTP headers,
6135 which one day we will use to better detect clock skew.
6137 o Changes from 0.0.8pre1:
6138 - Make it compile without warnings again on win32.
6139 - Log a warning if you're running an unverified server, to let you
6140 know you might want to get it verified.
6141 - Only pick a default nickname if you plan to be a server.
6144 Changes in version 0.0.8pre1 - 2004-07-23
6146 - Made our unit tests compile again on OpenBSD 3.5, and tor
6147 itself compile again on OpenBSD on a sparc64.
6148 - We were neglecting milliseconds when logging on win32, so
6149 everything appeared to happen at the beginning of each second.
6152 - 'Extend' relay cell payloads now include the digest of the
6153 intended next hop's identity key. Now we can verify that we're
6154 extending to the right router, and also extend to routers we
6155 hadn't heard of before.
6158 - Tor nodes can now act as relays (with an advertised ORPort)
6159 without being manually verified by the dirserver operators.
6160 - Uploaded descriptors of unverified routers are now accepted
6161 by the dirservers, and included in the directory.
6162 - Verified routers are listed by nickname in the running-routers
6163 list; unverified routers are listed as "$<fingerprint>".
6164 - We now use hash-of-identity-key in most places rather than
6165 nickname or addr:port, for improved security/flexibility.
6166 - To avoid Sybil attacks, paths still use only verified servers.
6167 But now we have a chance to play around with hybrid approaches.
6168 - Nodes track bandwidth usage to estimate capacity (not used yet).
6169 - ClientOnly option for nodes that never want to become servers.
6170 - Directory caching.
6171 - "AuthoritativeDir 1" option for the official dirservers.
6172 - Now other nodes (clients and servers) will cache the latest
6173 directory they've pulled down.
6174 - They can enable their DirPort to serve it to others.
6175 - Clients will pull down a directory from any node with an open
6176 DirPort, and check the signature/timestamp correctly.
6177 - Authoritative dirservers now fetch directories from other
6178 authdirservers, to stay better synced.
6179 - Running-routers list tells who's down also, along with noting
6180 if they're verified (listed by nickname) or unverified (listed
6182 - Allow dirservers to serve running-router list separately.
6183 This isn't used yet.
6184 - ORs connect-on-demand to other ORs
6185 - If you get an extend cell to an OR you're not connected to,
6186 connect, handshake, and forward the create cell.
6187 - The authoritative dirservers stay connected to everybody,
6188 and everybody stays connected to 0.0.7 servers, but otherwise
6189 clients/servers expire unused connections after 5 minutes.
6190 - When servers get a sigint, they delay 30 seconds (refusing new
6191 connections) then exit. A second sigint causes immediate exit.
6192 - File and name management:
6193 - Look for .torrc if no CONFDIR "torrc" is found.
6194 - If no datadir is defined, then choose, make, and secure ~/.tor
6196 - If torrc not found, exitpolicy reject *:*.
6197 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
6198 - If no nickname is defined, derive default from hostname.
6199 - Rename secret key files, e.g. identity.key -> secret_id_key,
6200 to discourage people from mailing their identity key to tor-ops.
6201 - Refuse to build a circuit before the directory has arrived --
6202 it won't work anyway, since you won't know the right onion keys
6204 - Try other dirservers immediately if the one you try is down. This
6205 should tolerate down dirservers better now.
6206 - Parse tor version numbers so we can do an is-newer-than check
6207 rather than an is-in-the-list check.
6208 - New socks command 'resolve', to let us shim gethostbyname()
6210 - A 'tor_resolve' script to access the socks resolve functionality.
6211 - A new socks-extensions.txt doc file to describe our
6212 interpretation and extensions to the socks protocols.
6213 - Add a ContactInfo option, which gets published in descriptor.
6214 - Publish OR uptime in descriptor (and thus in directory) too.
6215 - Write tor version at the top of each log file
6216 - New docs in the tarball:
6218 - Document that you should proxy your SSL traffic too.
6221 Changes in version 0.0.7.2 - 2004-07-07
6222 o A better fix for the 0.0.0.0 problem, that will hopefully
6223 eliminate the remaining related assertion failures.
6226 Changes in version 0.0.7.1 - 2004-07-04
6227 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
6228 since internally we use 0.0.0.0 to signify "not yet resolved".
6231 Changes in version 0.0.7 - 2004-06-07
6232 o Updated the man page to reflect the new features.
6235 Changes in version 0.0.7rc2 - 2004-06-06
6236 o Changes from 0.0.7rc1:
6237 - Make it build on Win32 again.
6238 o Changes from 0.0.6.2:
6239 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
6243 Changes in version 0.0.7rc1 - 2004-06-02
6245 - On sighup, we were adding another log without removing the first
6246 one. So log messages would get duplicated n times for n sighups.
6247 - Several cases of using a connection after we'd freed it. The
6248 problem was that connections that are pending resolve are in both
6249 the pending_resolve tree, and also the circuit's resolving_streams
6250 list. When you want to remove one, you must remove it from both.
6251 - Fix a double-mark-for-close where an end cell arrived for a
6252 resolving stream, and then the resolve failed.
6253 - Check directory signatures based on name of signer, not on whom
6254 we got the directory from. This will let us cache directories more
6257 - Crank up some of our constants to handle more users.
6260 Changes in version 0.0.7pre1 - 2004-06-02
6261 o Fixes for crashes and other obnoxious bugs:
6262 - Fix an epipe bug: sometimes when directory connections failed
6263 to connect, we would give them a chance to flush before closing
6265 - When we detached from a circuit because of resolvefailed, we
6266 would immediately try the same circuit twice more, and then
6267 give up on the resolve thinking we'd tried three different
6269 - Limit the number of intro circuits we'll attempt to build for a
6270 hidden service per 15-minute period.
6271 - Check recommended-software string *early*, before actually parsing
6272 the directory. Thus we can detect an obsolete version and exit,
6273 even if the new directory format doesn't parse.
6274 o Fixes for security bugs:
6275 - Remember which nodes are dirservers when you startup, and if a
6276 random OR enables his dirport, don't automatically assume he's
6277 a trusted dirserver.
6279 - Directory connections were asking the wrong poll socket to
6280 start writing, and not asking themselves to start writing.
6281 - When we detached from a circuit because we sent a begin but
6282 didn't get a connected, we would use it again the first time;
6283 but after that we would correctly switch to a different one.
6284 - Stop warning when the first onion decrypt attempt fails; they
6285 will sometimes legitimately fail now that we rotate keys.
6286 - Override unaligned-access-ok check when $host_cpu is ia64 or
6287 arm. Apparently they allow it but the kernel whines.
6288 - Dirservers try to reconnect periodically too, in case connections
6290 - Fix some memory leaks in directory servers.
6291 - Allow backslash in Win32 filenames.
6292 - Made Tor build complain-free on FreeBSD, hopefully without
6293 breaking other BSD builds. We'll see.
6295 - Doxygen markup on all functions and global variables.
6296 - Make directory functions update routerlist, not replace it. So
6297 now directory disagreements are not so critical a problem.
6298 - Remove the upper limit on number of descriptors in a dirserver's
6299 directory (not that we were anywhere close).
6300 - Allow multiple logfiles at different severity ranges.
6301 - Allow *BindAddress to specify ":port" rather than setting *Port
6302 separately. Allow multiple instances of each BindAddress config
6303 option, so you can bind to multiple interfaces if you want.
6304 - Allow multiple exit policy lines, which are processed in order.
6305 Now we don't need that huge line with all the commas in it.
6306 - Enable accept/reject policies on SOCKS connections, so you can bind
6307 to 0.0.0.0 but still control who can use your OP.
6310 Changes in version 0.0.6.2 - 2004-05-16
6311 o Our integrity-checking digest was checking only the most recent cell,
6312 not the previous cells like we'd thought.
6313 Thanks to Stefan Mark for finding the flaw!
6316 Changes in version 0.0.6.1 - 2004-05-06
6317 o Fix two bugs in our AES counter-mode implementation (this affected
6318 onion-level stream encryption, but not TLS-level). It turns
6319 out we were doing something much more akin to a 16-character
6320 polyalphabetic cipher. Oops.
6321 Thanks to Stefan Mark for finding the flaw!
6322 o Retire moria3 as a directory server, and add tor26 as a directory
6326 Changes in version 0.0.6 - 2004-05-02
6330 Changes in version 0.0.6rc4 - 2004-05-01
6331 o Update the built-in dirservers list to use the new directory format
6332 o Fix a rare seg fault: if a node offering a hidden service attempts
6333 to build a circuit to Alice's rendezvous point and fails before it
6334 reaches the last hop, it retries with a different circuit, but
6336 o Handle windows socket errors correctly.
6339 Changes in version 0.0.6rc3 - 2004-04-28
6340 o Don't expire non-general excess circuits (if we had enough
6341 circuits open, we were expiring rendezvous circuits -- even
6342 when they had a stream attached. oops.)
6343 o Fetch randomness from /dev/urandom better (not via fopen/fread)
6344 o Better debugging for tls errors
6345 o Some versions of openssl have an SSL_pending function that erroneously
6346 returns bytes when there is a non-application record pending.
6347 o Set Content-Type on the directory and hidserv descriptor.
6348 o Remove IVs from cipher code, since AES-ctr has none.
6349 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
6350 o We were using an array of length zero in a few places.
6351 o win32's gethostbyname can't resolve an IP to an IP.
6352 o win32's close can't close a socket.
6355 Changes in version 0.0.6rc2 - 2004-04-26
6356 o Fix a bug where we were closing tls connections intermittently.
6357 It turns out openssl keeps its errors around -- so if an error
6358 happens, and you don't ask about it, and then another openssl
6359 operation happens and succeeds, and you ask if there was an error,
6360 it tells you about the first error. Fun fun.
6361 o Fix a bug that's been lurking since 27 may 03 (!)
6362 When passing back a destroy cell, we would use the wrong circ id.
6363 'Mostly harmless', but still worth fixing.
6364 o Since we don't support truncateds much, don't bother sending them;
6365 just close the circ.
6366 o check for <machine/limits.h> so we build on NetBSD again (I hope).
6367 o don't crash if a conn that sent a begin has suddenly lost its circuit
6368 (this was quite rare).
6371 Changes in version 0.0.6rc1 - 2004-04-25
6372 o We now rotate link (tls context) keys and onion keys.
6373 o CREATE cells now include oaep padding, so you can tell
6374 if you decrypted them correctly.
6375 o Add bandwidthburst to server descriptor.
6376 o Directories now say which dirserver signed them.
6377 o Use a tor_assert macro that logs failed assertions too.
6380 Changes in version 0.0.6pre5 - 2004-04-18
6381 o changes from 0.0.6pre4:
6382 - make tor build on broken freebsd 5.2 installs
6383 - fix a failed assert when you try an intro point, get a nack, and try
6384 a second one and it works.
6385 - when alice uses a port that the hidden service doesn't accept,
6386 it now sends back an end cell (denied by exit policy). otherwise
6387 alice would just have to wait to time out.
6388 - fix another rare bug: when we had tried all the intro
6389 points for a hidden service, we fetched the descriptor
6390 again, but we left our introcirc thinking it had already
6391 sent an intro, so it kept waiting for a response...
6392 - bugfix: when you sleep your hidden-service laptop, as soon
6393 as it wakes up it tries to upload a service descriptor, but
6394 socketpair fails for some reason (localhost not up yet?).
6395 now we simply give up on that upload, and we'll try again later.
6396 i'd still like to find the bug though.
6397 - if an intro circ waiting for an ack dies before getting one, then
6399 - we were reusing stale service descriptors and refetching usable
6403 Changes in version 0.0.6pre4 - 2004-04-14
6404 o changes from 0.0.6pre3:
6405 - when bob fails to connect to the rendezvous point, and his
6406 circ didn't fail because of the rendezvous point itself, then
6407 he retries a couple of times
6408 - we expire introduction and rendezvous circs more thoroughly
6409 (sometimes they were hanging around forever)
6410 - we expire unattached rendezvous streams that have been around
6411 too long (they were sticking around forever).
6412 - fix a measly fencepost error that was crashing everybody with
6416 Changes in version 0.0.6pre3 - 2004-04-14
6417 o changes from 0.0.6pre2:
6418 - make hup work again
6419 - fix some memory leaks for dirservers
6420 - allow more skew in rendezvous descriptor timestamps, to help
6421 handle people like blanu who don't know what time it is
6422 - normal circs are 3 hops, but some rend/intro circs are 4, if
6423 the initiator doesn't get to choose the last hop
6424 - send acks for introductions, so alice can know whether to try
6426 - bob publishes intro points more correctly
6427 o changes from 0.0.5:
6428 - fix an assert trigger that's been plaguing us since the days
6429 of 0.0.2prexx (thanks weasel!)
6430 - retry stream correctly when we fail to connect because of
6431 exit-policy-reject (should try another) or can't-resolve-address
6432 (also should try another, because dns on random internet servers
6434 - when we hup a dirserver and we've *removed* a server from the
6435 approved-routers list, now we remove that server from the
6436 in-memory directories too
6439 Changes in version 0.0.6pre2 - 2004-04-08
6440 o We fixed our base32 implementation. Now it works on all architectures.
6443 Changes in version 0.0.6pre1 - 2004-04-08
6445 - Hidden services and rendezvous points are implemented. Go to
6446 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
6447 hidden services. (This only works via a socks4a proxy such as
6448 Privoxy, and currently it's quite slow.)
6451 Changes in version 0.0.5 - 2004-03-30
6455 Changes in version 0.0.5rc3 - 2004-03-29
6456 o Install torrc as torrc.sample -- we no longer clobber your
6458 o Re-enable recommendedversion checking (we broke it in rc2, oops)
6459 o Add in a 'notice' log level for things the operator should hear
6460 but that aren't warnings
6463 Changes in version 0.0.5rc2 - 2004-03-29
6464 o Hold socks connection open until reply is flushed (if possible)
6465 o Make exit nodes resolve IPs to IPs immediately, rather than asking
6466 the dns farm to do it.
6467 o Fix c99 aliasing warnings in rephist.c
6468 o Don't include server descriptors that are older than 24 hours in the
6470 o Give socks 'reject' replies their whole 15s to attempt to flush,
6471 rather than seeing the 60s timeout and assuming the flush had failed.
6472 o Clean automake droppings from the cvs repository
6475 Changes in version 0.0.5rc1 - 2004-03-28
6476 o Fix mangled-state bug in directory fetching (was causing sigpipes).
6477 o Only build circuits after we've fetched the directory: clients were
6478 using only the directory servers before they'd fetched a directory.
6479 This also means longer startup time; so it goes.
6480 o Fix an assert trigger where an OP would fail to handshake, and we'd
6481 expect it to have a nickname.
6482 o Work around a tsocks bug: do a socks reject when AP connection dies
6483 early, else tsocks goes into an infinite loop.
6486 Changes in version 0.0.4 - 2004-03-26
6487 o When connecting to a dirserver or OR and the network is down,
6491 Changes in version 0.0.3 - 2004-03-26
6492 o Warn and fail if server chose a nickname with illegal characters
6493 o Port to Solaris and Sparc:
6494 - include missing header fcntl.h
6495 - have autoconf find -lsocket -lnsl automatically
6496 - deal with hardware word alignment
6497 - make uname() work (solaris has a different return convention)
6498 - switch from using signal() to sigaction()
6499 o Preliminary work on reputation system:
6500 - Keep statistics on success/fail of connect attempts; they're published
6501 by kill -USR1 currently.
6502 - Add a RunTesting option to try to learn link state by creating test
6503 circuits, even when SocksPort is off.
6504 - Remove unused open circuits when there are too many.
6507 Changes in version 0.0.2 - 2004-03-19
6508 - Include strlcpy and strlcat for safer string ops
6509 - define INADDR_NONE so we compile (but still not run) on solaris
6512 Changes in version 0.0.2pre27 - 2004-03-14
6514 - Allow internal tor networks (we were rejecting internal IPs,
6515 now we allow them if they're set explicitly).
6516 - And fix a few endian issues.
6519 Changes in version 0.0.2pre26 - 2004-03-14
6521 - If a stream times out after 15s without a connected cell, don't
6522 try that circuit again: try a new one.
6523 - Retry streams at most 4 times. Then give up.
6524 - When a dirserver gets a descriptor from an unknown router, it
6525 logs its fingerprint (so the dirserver operator can choose to
6526 accept it even without mail from the server operator).
6527 - Inform unapproved servers when we reject their descriptors.
6528 - Make tor build on Windows again. It works as a client, who knows
6530 - Clearer instructions in the torrc for how to set up a server.
6531 - Be more efficient about reading fd's when our global token bucket
6532 (used for rate limiting) becomes empty.
6534 - Stop asserting that computers always go forward in time. It's
6536 - When we sent a cell (e.g. destroy) and then marked an OR connection
6537 expired, we might close it before finishing a flush if the other
6538 side isn't reading right then.
6539 - Don't allow dirservers to start if they haven't defined
6541 - We were caching transient dns failures. Oops.
6542 - Prevent servers from publishing an internal IP as their address.
6543 - Address a strcat vulnerability in circuit.c
6546 Changes in version 0.0.2pre25 - 2004-03-04
6548 - Put the OR's IP in its router descriptor, not its fqdn. That way
6549 we'll stop being stalled by gethostbyname for nodes with flaky dns,
6552 - If the user typed in an address that didn't resolve, the server
6556 Changes in version 0.0.2pre24 - 2004-03-03
6558 - Fix an assertion failure in dns.c, where we were trying to dequeue
6559 a pending dns resolve even if it wasn't pending
6560 - Fix a spurious socks5 warning about still trying to write after the
6561 connection is finished.
6562 - Hold certain marked_for_close connections open until they're finished
6563 flushing, rather than losing bytes by closing them too early.
6564 - Correctly report the reason for ending a stream
6565 - Remove some duplicate calls to connection_mark_for_close
6566 - Put switch_id and start_daemon earlier in the boot sequence, so it
6567 will actually try to chdir() to options.DataDirectory
6568 - Make 'make test' exit(1) if a test fails; fix some unit tests
6569 - Make tor fail when you use a config option it doesn't know about,
6570 rather than warn and continue.
6571 - Make --version work
6572 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
6575 Changes in version 0.0.2pre23 - 2004-02-29
6577 - Print a statement when the first circ is finished, so the user
6579 - If a relay cell is unrecognized at the end of the circuit,
6580 send back a destroy. (So attacks to mutate cells are more
6582 - New config option 'excludenodes' to avoid certain nodes for circuits.
6583 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
6584 so you can collect coredumps there.
6586 - Fix a bug in tls flushing where sometimes data got wedged and
6587 didn't flush until more data got sent. Hopefully this bug was
6588 a big factor in the random delays we were seeing.
6589 - Make 'connected' cells include the resolved IP, so the client
6590 dns cache actually gets populated.
6591 - Disallow changing from ORPort=0 to ORPort>0 on hup.
6592 - When we time-out on a stream and detach from the circuit, send an
6593 end cell down it first.
6594 - Only warn about an unknown router (in exitnodes, entrynodes,
6595 excludenodes) after we've fetched a directory.
6598 Changes in version 0.0.2pre22 - 2004-02-26
6600 - Servers publish less revealing uname information in descriptors.
6601 - More memory tracking and assertions, to crash more usefully when
6603 - If the default torrc isn't there, just use some default defaults.
6604 Plus provide an internal dirservers file if they don't have one.
6605 - When the user tries to use Tor as an http proxy, give them an http
6606 501 failure explaining that we're a socks proxy.
6607 - Dump a new router.desc on hup, to help confused people who change
6608 their exit policies and then wonder why router.desc doesn't reflect
6610 - Clean up the generic tor.sh init script that we ship with.
6612 - If the exit stream is pending on the resolve, and a destroy arrives,
6613 then the stream wasn't getting removed from the pending list. I
6614 think this was the one causing recent server crashes.
6615 - Use a more robust poll on OSX 10.3, since their poll is flaky.
6616 - When it couldn't resolve any dirservers, it was useless from then on.
6617 Now it reloads the RouterFile (or default dirservers) if it has no
6619 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
6620 many users don't even *have* a /usr/local/sbin/.
6623 Changes in version 0.0.2pre21 - 2004-02-18
6625 - There's a ChangeLog file that actually reflects the changelog.
6626 - There's a 'torify' wrapper script, with an accompanying
6627 tor-tsocks.conf, that simplifies the process of using tsocks for
6628 tor. It even has a man page.
6629 - The tor binary gets installed to sbin rather than bin now.
6630 - Retry streams where the connected cell hasn't arrived in 15 seconds
6631 - Clean up exit policy handling -- get the default out of the torrc,
6632 so we can update it without forcing each server operator to fix
6634 - Allow imaps and pop3s in default exit policy
6636 - Prevent picking middleman nodes as the last node in the circuit
6639 Changes in version 0.0.2pre20 - 2004-01-30
6641 - We now have a deb package, and it's in debian unstable. Go to
6643 - I've split the TotalBandwidth option into BandwidthRate (how many
6644 bytes per second you want to allow, long-term) and
6645 BandwidthBurst (how many bytes you will allow at once before the cap
6646 kicks in). This better token bucket approach lets you, say, set
6647 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
6648 performance while not exceeding your monthly bandwidth quota.
6649 - Push out a tls record's worth of data once you've got it, rather
6650 than waiting until you've read everything waiting to be read. This
6651 may improve performance by pipelining better. We'll see.
6652 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
6653 from failed circuits (if they haven't been connected yet) and attach
6655 - Expire old streams that haven't managed to connect. Some day we'll
6656 have them reattach to new circuits instead.
6659 - Fix several memory leaks that were causing servers to become bloated
6661 - Fix a few very rare assert triggers. A few more remain.
6662 - Setuid to User _before_ complaining about running as root.
6665 Changes in version 0.0.2pre19 - 2004-01-07
6667 - Fix deadlock condition in dns farm. We were telling a child to die by
6668 closing the parent's file descriptor to him. But newer children were
6669 inheriting the open file descriptor from the parent, and since they
6670 weren't closing it, the socket never closed, so the child never read
6671 eof, so he never knew to exit. Similarly, dns workers were holding
6672 open other sockets, leading to all sorts of chaos.
6673 - New cleaner daemon() code for forking and backgrounding.
6674 - If you log to a file, it now prints an entry at the top of the
6675 logfile so you know it's working.
6676 - The onionskin challenge length was 30 bytes longer than necessary.
6677 - Started to patch up the spec so it's not quite so out of date.
6680 Changes in version 0.0.2pre18 - 2004-01-02
6682 - Fix endian issues with the 'integrity' field in the relay header.
6683 - Fix a potential bug where connections in state
6684 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
6687 Changes in version 0.0.2pre17 - 2003-12-30
6689 - Made --debuglogfile (or any second log file, actually) work.
6690 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
6691 adversary could force us into an infinite loop.
6694 - Each onionskin handshake now includes a hash of the computed key,
6695 to prove the server's identity and help perfect forward secrecy.
6696 - Changed cell size from 256 to 512 bytes (working toward compatibility
6698 - Changed cell length to 2 bytes, and moved it to the relay header.
6699 - Implemented end-to-end integrity checking for the payloads of
6701 - Separated streamid from 'recognized' (otherwise circuits will get
6702 messed up when we try to have streams exit from the middle). We
6703 use the integrity-checking to confirm that a cell is addressed to
6705 - Randomize the initial circid and streamid values, so an adversary who
6706 breaks into a node can't learn how many circuits or streams have
6710 Changes in version 0.0.2pre16 - 2003-12-14
6712 - Fixed a bug that made HUP trigger an assert
6713 - Fixed a bug where a circuit that immediately failed wasn't being
6714 counted as a failed circuit in counting retries.
6717 - Now we close the circuit when we get a truncated cell: otherwise we're
6718 open to an anonymity attack where a bad node in the path truncates
6719 the circuit and then we open streams at him.
6720 - Add port ranges to exit policies
6721 - Add a conservative default exit policy
6722 - Warn if you're running tor as root
6723 - on HUP, retry OR connections and close/rebind listeners
6724 - options.EntryNodes: try these nodes first when picking the first node
6725 - options.ExitNodes: if your best choices happen to include any of
6726 your preferred exit nodes, you choose among just those preferred
6728 - options.ExcludedNodes: nodes that are never picked in path building
6731 Changes in version 0.0.2pre15 - 2003-12-03
6732 o Robustness and bugfixes:
6733 - Sometimes clients would cache incorrect DNS resolves, which would
6734 really screw things up.
6735 - An OP that goes offline would slowly leak all its sockets and stop
6737 - A wide variety of bugfixes in exit node selection, exit policy
6738 handling, and processing pending streams when a new circuit is
6740 - Pick nodes for a path only from those the directory says are up
6741 - Choose randomly from all running dirservers, not always the first one
6742 - Increase allowed http header size for directory fetch.
6743 - Stop writing to stderr (if we're daemonized it will be closed).
6744 - Enable -g always, so cores will be more useful to me.
6745 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
6748 - Wrote a man page. It lists commonly used options.
6751 - Change default loglevel to warn.
6752 - Make PidFile default to null rather than littering in your CWD.
6753 - OnionRouter config option is now obsolete. Instead it just checks
6755 - Moved to a single unified torrc file for both clients and servers.
6758 Changes in version 0.0.2pre14 - 2003-11-29
6759 o Robustness and bugfixes:
6760 - Force the admin to make the DataDirectory himself
6761 - to get ownership/permissions right
6762 - so clients no longer make a DataDirectory and then never use it
6763 - fix bug where a client who was offline for 45 minutes would never
6764 pull down a directory again
6765 - fix (or at least hide really well) the dns assert bug that was
6766 causing server crashes
6767 - warnings and improved robustness wrt clockskew for certs
6768 - use the native daemon(3) to daemonize, when available
6769 - exit if bind() fails
6770 - exit if neither socksport nor orport is defined
6771 - include our own tor_timegm (Win32 doesn't have its own)
6772 - bugfix for win32 with lots of connections
6773 - fix minor bias in PRNG
6774 - make dirserver more robust to corrupt cached directory
6777 - Wrote the design document (woo)
6779 o Circuit building and exit policies:
6780 - Circuits no longer try to use nodes that the directory has told them
6782 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
6783 bitcounts (18.0.0.0/8).
6784 - Make AP connections standby for a circuit if no suitable circuit
6785 exists, rather than failing
6786 - Circuits choose exit node based on addr/port, exit policies, and
6787 which AP connections are standing by
6788 - Bump min pathlen from 2 to 3
6789 - Relay end cells have a payload to describe why the stream ended.
6790 - If the stream failed because of exit policy, try again with a new
6792 - Clients have a dns cache to remember resolved addresses.
6793 - Notice more quickly when we have no working circuits
6796 - APPort is now called SocksPort
6797 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
6799 - RecommendedVersions is now a config variable rather than
6800 hardcoded (for dirservers)
6801 - Reloads config on HUP
6802 - Usage info on -h or --help
6803 - If you set User and Group config vars, it'll setu/gid to them.
6806 Changes in version 0.0.2pre13 - 2003-10-19
6807 o General stability:
6808 - SSL_write no longer fails when it returns WANTWRITE and the number
6809 of bytes in the buf has changed by the next SSL_write call.
6810 - Fix segfault fetching directory when network is down
6811 - Fix a variety of minor memory leaks
6812 - Dirservers reload the fingerprints file on HUP, so I don't have
6813 to take down the network when I approve a new router
6814 - Default server config file has explicit Address line to specify fqdn
6817 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
6818 - Make listener connections not ever alloc bufs
6820 o Autoconf improvements:
6821 - don't clobber an external CFLAGS in ./configure
6822 - Make install now works
6823 - create var/lib/tor on make install
6824 - autocreate a tor.sh initscript to help distribs
6825 - autocreate the torrc and sample-server-torrc with correct paths
6827 o Log files and Daemonizing now work:
6828 - If --DebugLogFile is specified, log to it at -l debug
6829 - If --LogFile is specified, use it instead of commandline
6830 - If --RunAsDaemon is set, tor forks and backgrounds on startup