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.
6 - Begin implementation of proposal 121 (Client authorization for
7 hidden services): associate keys, client lists, and authorization
8 types with hidden services.
11 - Recover 3-7 bytes that were wasted per memory chunk. Fixes bug
12 794; bug spotted by rovv. Bugfix on 0.2.0.1-alpha.
13 - When using the TransPort option on OpenBSD, and using the User
14 option to change UID and drop privileges, make sure to open
15 /dev/pf before dropping privileges. Fixes bug 782. Patch from
16 Christopher Davis. Bugfix on 0.1.2.1-alpha.
17 - Correctly detect the presence of the linux/netfilter_ipv4.h header
18 when building against recent kernels. Bugfix on 0.1.2.1-alpha.
19 - Add a missing safe_str() call for a debug log message.
22 Changes in version 0.2.1.4-alpha - 2008-08-04
24 - The address part of exit policies was not correctly written
25 to router descriptors. This generated router descriptors that failed
26 their self-checks. Noticed by phobos, fixed by Karsten. Bugfix
28 - Tor triggered a false assert when extending a circuit to a relay
29 but we already have a connection open to that relay. Noticed by
30 phobos, fixed by Karsten. Bugfix on 0.2.1.3-alpha.
33 - Fix a hidden service logging bug: in some edge cases, the router
34 descriptor of a previously picked introduction point becomes
35 obsolete and we need to give up on it rather than continually
36 complaining that it has become obsolete. Observed by xiando. Bugfix
40 - Take out the TestVia config option, since it was a workaround for
41 a bug that was fixed in Tor 0.1.1.21.
44 Changes in version 0.2.1.3-alpha - 2008-08-03
45 o Bootstrapping bugfixes (on 0.2.1.x-alpha):
46 - Send a bootstrap problem "warn" event on the first problem if the
47 reason is NO_ROUTE (that is, our network is down).
50 - Implement most of proposal 110: The first K cells to be sent
51 along a circuit are marked as special "early" cells; only K "early"
52 cells will be allowed. Once this code is universal, we can block
53 certain kinds of DOS attack by requiring that EXTEND commands must
54 be sent using an "early" cell.
57 - Try to attach connections immediately upon receiving a RENDEZVOUS2
58 or RENDEZVOUS_ESTABLISHED cell. This can save a second or two
59 on the client side when connecting to a hidden service. Bugfix
60 on 0.0.6pre1. Found and fixed by Christian Wilms; resolves bug 743.
61 - Ensure that two circuits can never exist on the same connection
62 with the same circuit ID, even if one is marked for close. This
63 is conceivably a bugfix for bug 779; fixes a bug on 0.1.0.4-rc.
66 - When relays do their initial bandwidth measurement, don't limit
67 to just our entry guards for the test circuits. Otherwise we tend
68 to have multiple test circuits going through a single entry guard,
69 which makes our bandwidth test less accurate. Fixes part of bug 654;
70 patch contributed by Josh Albrecht.
71 - Add an ExcludeExitNodes option so users can list a set of nodes
72 that should be be excluded from the exit node position, but
73 allowed elsewhere. Implements proposal 151.
74 - Allow address patterns (e.g., 255.128.0.0/16) to appear in
75 ExcludeNodes and ExcludeExitNodes lists.
76 - Change the implementation of ExcludeNodes and ExcludeExitNodes to
77 be more efficient. Formerly it was quadratic in the number of
78 servers; now it should be linear. Fixes bug 509.
79 - Save 16-22 bytes per open circuit by moving the n_addr, n_port,
80 and n_conn_id_digest fields into a separate structure that's
81 only needed when the circuit has not yet attached to an n_conn.
84 - Change the contrib/tor.logrotate script so it makes the new
85 logs as "_tor:_tor" rather than the default, which is generally
86 "root:wheel". Fixes bug 676, reported by Serge Koksharov.
87 - Stop using __attribute__((nonnull)) with GCC: it can give us useful
88 warnings (occasionally), but it can also cause the compiler to
89 eliminate error-checking code. Suggested by Peter Gutmann.
90 - When a hidden service is giving up on an introduction point candidate
91 that was not included in the last published rendezvous descriptor,
92 don't reschedule publication of the next descriptor. Fixes bug 763.
94 - Mark RendNodes, RendExcludeNodes, HiddenServiceNodes, and
95 HiddenServiceExcludeNodes as obsolete: they never worked properly,
96 and nobody claims to be using them. Fixes bug 754. Bugfix on
97 0.1.0.1-rc. Patch from Christian Wilms.
98 - Fix a small alignment and memory-wasting bug on buffer chunks. Spotted
101 o Minor bugfixes (controller):
102 - When closing an application-side connection because its circuit
103 is getting torn down, generate the stream event correctly.
104 Bugfix on 0.1.2.x. Anonymous patch.
107 - Remove all backward-compatibility code to support relays running
108 versions of Tor so old that they no longer work at all on the
112 Changes in version 0.2.0.29-rc - 2008-07-08
114 - If you have more than one bridge but don't know their keys,
115 you would only launch a request for the descriptor of the first one
116 on your list. (Tor considered launching requests for the others, but
117 found that it already had a connection on the way for $0000...0000
118 so it didn't open another.) Bugfix on 0.2.0.x.
119 - If you have more than one bridge but don't know their keys, and the
120 connection to one of the bridges failed, you would cancel all
121 pending bridge connections. (After all, they all have the same
122 digest.) Bugfix on 0.2.0.x.
123 - When a hidden service was trying to establish an introduction point,
124 and Tor had built circuits preemptively for such purposes, we
125 were ignoring all the preemptive circuits and launching a new one
126 instead. Bugfix on 0.2.0.14-alpha.
127 - When a hidden service was trying to establish an introduction point,
128 and Tor *did* manage to reuse one of the preemptively built
129 circuits, it didn't correctly remember which one it used,
130 so it asked for another one soon after, until there were no
131 more preemptive circuits, at which point it launched one from
132 scratch. Bugfix on 0.0.9.x.
133 - Make directory servers include the X-Your-Address-Is: http header in
134 their responses even for begin_dir conns. Now clients who only
135 ever use begin_dir connections still have a way to learn their IP
136 address. Fixes bug 737; bugfix on 0.2.0.22-rc. Reported by goldy.
139 - Fix a macro/CPP interaction that was confusing some compilers:
140 some GCCs don't like #if/#endif pairs inside macro arguments.
142 - Fix macro collision between OpenSSL 0.9.8h and Windows headers.
143 Fixes bug 704; fix from Steven Murdoch.
144 - When opening /dev/null in finish_daemonize(), do not pass the
145 O_CREAT flag. Fortify was complaining, and correctly so. Fixes
146 bug 742; fix from Michael Scherer. Bugfix on 0.0.2pre19.
147 - Correctly detect transparent proxy support on Linux hosts that
148 require in.h to be included before netfilter_ipv4.h. Patch
150 - Disallow session resumption attempts during the renegotiation
151 stage of the v2 handshake protocol. Clients should never be
152 trying session resumption at this point, but apparently some
153 did, in ways that caused the handshake to fail. Bugfix on
154 0.2.0.20-rc. Bug found by Geoff Goodell.
157 Changes in version 0.2.1.2-alpha - 2008-06-20
158 Tor 0.2.1.2-alpha includes a new "TestingTorNetwork" config option to
159 make it easier to set up your own private Tor network; fixes several
160 big bugs with using more than one bridge relay; fixes a big bug with
161 offering hidden services quickly after Tor starts; and uses a better
162 API for reporting potential bootstrapping problems to the controller.
165 - New TestingTorNetwork config option to allow adjustment of
166 previously constant values that, while reasonable, could slow
167 bootstrapping. Implements proposal 135. Patch from Karsten.
170 - If you have more than one bridge but don't know their digests,
171 you would only learn a request for the descriptor of the first one
172 on your list. (Tor considered launching requests for the others, but
173 found that it already had a connection on the way for $0000...0000
174 so it didn't open another.) Bugfix on 0.2.0.x.
175 - If you have more than one bridge but don't know their digests,
176 and the connection to one of the bridges failed, you would cancel
177 all pending bridge connections. (After all, they all have the
178 same digest.) Bugfix on 0.2.0.x.
179 - When establishing a hidden service, introduction points that
180 originate from cannibalized circuits are completely ignored and not
181 included in rendezvous service descriptors. This might be another
182 reason for delay in making a hidden service available. Bugfix
183 from long ago (0.0.9.x?)
186 - Allow OpenSSL to use dynamic locks if it wants.
187 - When building a consensus, do not include routers that are down.
188 This will cut down 30% to 40% on consensus size. Implements
190 - In directory authorities' approved-routers files, allow
191 fingerprints with or without space.
192 - Add a "GETINFO /status/bootstrap-phase" controller option, so the
193 controller can query our current bootstrap state in case it attaches
194 partway through and wants to catch up.
195 - Send an initial "Starting" bootstrap status event, so we have a
196 state to start out in.
199 - Asking for a conditional consensus at .../consensus/<fingerprints>
200 would crash a dirserver if it did not already have a
201 consensus. Bugfix on 0.2.1.1-alpha.
202 - Clean up some macro/CPP interactions: some GCC versions don't like
203 #if/#endif pairs inside macro arguments. Fixes bug 707. Bugfix on
206 o Bootstrapping bugfixes (on 0.2.1.1-alpha):
207 - Directory authorities shouldn't complain about bootstrapping
208 problems just because they do a lot of reachability testing and
209 some of the connection attempts fail.
210 - Start sending "count" and "recommendation" key/value pairs in
211 bootstrap problem status events, so the controller can hear about
212 problems even before Tor decides they're worth reporting for sure.
213 - If you're using bridges, generate "bootstrap problem" warnings
214 as soon as you run out of working bridges, rather than waiting
215 for ten failures -- which will never happen if you have less than
217 - If we close our OR connection because there's been a circuit
218 pending on it for too long, we were telling our bootstrap status
219 events "REASON=NONE". Now tell them "REASON=TIMEOUT".
222 Changes in version 0.2.1.1-alpha - 2008-06-13
223 Tor 0.2.1.1-alpha fixes a lot of memory fragmentation problems that
224 were making the Tor process bloat especially on Linux; makes our TLS
225 handshake blend in better; sends "bootstrap phase" status events to
226 the controller, so it can keep the user informed of progress (and
227 problems) fetching directory information and establishing circuits;
228 and adds a variety of smaller features.
231 - More work on making our TLS handshake blend in: modify the list
232 of ciphers advertised by OpenSSL in client mode to even more
233 closely resemble a common web browser. We cheat a little so that
234 we can advertise ciphers that the locally installed OpenSSL doesn't
236 - Start sending "bootstrap phase" status events to the controller,
237 so it can keep the user informed of progress fetching directory
238 information and establishing circuits. Also inform the controller
239 if we think we're stuck at a particular bootstrap phase. Implements
241 - Resume using OpenSSL's RAND_poll() for better (and more portable)
242 cross-platform entropy collection again. We used to use it, then
243 stopped using it because of a bug that could crash systems that
244 called RAND_poll when they had a lot of fds open. It looks like the
245 bug got fixed in late 2006. Our new behavior is to call RAND_poll()
246 at startup, and to call RAND_poll() when we reseed later only if
247 we have a non-buggy OpenSSL version.
250 - When we choose to abandon a new entry guard because we think our
251 older ones might be better, close any circuits pending on that
252 new entry guard connection. This fix should make us recover much
253 faster when our network is down and then comes back. Bugfix on
254 0.1.2.8-beta; found by lodger.
256 o Memory fixes and improvements:
257 - Add a malloc_good_size implementation to OpenBSD_malloc_linux.c,
258 to avoid unused RAM in buffer chunks and memory pools.
259 - Speed up parsing and cut down on memory fragmentation by using
260 stack-style allocations for parsing directory objects. Previously,
261 this accounted for over 40% of allocations from within Tor's code
262 on a typical directory cache.
263 - Use a Bloom filter rather than a digest-based set to track which
264 descriptors we need to keep around when we're cleaning out old
265 router descriptors. This speeds up the computation significantly,
266 and may reduce fragmentation.
267 - Reduce the default smartlist size from 32 to 16; it turns out that
268 most smartlists hold around 8-12 elements tops.
269 - Make dumpstats() log the fullness and size of openssl-internal
271 - If the user has applied the experimental SSL_MODE_RELEASE_BUFFERS
272 patch to their OpenSSL, turn it on to save memory on servers. This
273 patch will (with any luck) get included in a mainline distribution
275 - Never use OpenSSL compression: it wastes RAM and CPU trying to
276 compress cells, which are basically all encrypted, compressed,
280 - Stop reloading the router list from disk for no reason when we
281 run out of reachable directory mirrors. Once upon a time reloading
282 it would set the 'is_running' flag back to 1 for them. It hasn't
283 done that for a long time.
284 - In very rare situations new hidden service descriptors were
285 published earlier than 30 seconds after the last change to the
286 service. (We currently think that a hidden service descriptor
287 that's been stable for 30 seconds is worth publishing.)
290 - Allow separate log levels to be configured for different logging
291 domains. For example, this allows one to log all notices, warnings,
292 or errors, plus all memory management messages of level debug or
293 higher, with: Log [MM] debug-err [*] notice-err file /var/log/tor.
294 - Add a couple of extra warnings to --enable-gcc-warnings for GCC 4.3,
295 and stop using a warning that had become unfixably verbose under
297 - New --hush command-line option similar to --quiet. While --quiet
298 disables all logging to the console on startup, --hush limits the
299 output to messages of warning and error severity.
300 - Servers support a new URL scheme for consensus downloads that
301 allows the client to specify which authorities are trusted.
302 The server then only sends the consensus if the client will trust
303 it. Otherwise a 404 error is sent back. Clients use this
304 new scheme when the server supports it (meaning it's running
305 0.2.1.1-alpha or later). Implements proposal 134.
306 - New configure/torrc options (--enable-geoip-stats,
307 DirRecordUsageByCountry) to record how many IPs we've served
308 directory info to in each country code, how many status documents
309 total we've sent to each country code, and what share of the total
310 directory requests we should expect to see.
311 - Use the TLS1 hostname extension to more closely resemble browser
313 - Lots of new unit tests.
314 - Add a macro to implement the common pattern of iterating through
315 two parallel lists in lockstep.
318 Changes in version 0.2.0.28-rc - 2008-06-13
319 Tor 0.2.0.28-rc fixes an anonymity-related bug, fixes a hidden-service
320 performance bug, and fixes a bunch of smaller bugs.
323 - Fix a bug where, when we were choosing the 'end stream reason' to
324 put in our relay end cell that we send to the exit relay, Tor
325 clients on Windows were sometimes sending the wrong 'reason'. The
326 anonymity problem is that exit relays may be able to guess whether
327 the client is running Windows, thus helping partition the anonymity
328 set. Down the road we should stop sending reasons to exit relays,
329 or otherwise prevent future versions of this bug.
332 - While setting up a hidden service, some valid introduction circuits
333 were overlooked and abandoned. This might be the reason for
334 the long delay in making a hidden service available. Bugfix on
338 - Update to the "June 9 2008" ip-to-country file.
339 - Run 'make test' as part of 'make dist', so we stop releasing so
340 many development snapshots that fail their unit tests.
343 - When we're checking if we have enough dir info for each relay
344 to begin establishing circuits, make sure that we actually have
345 the descriptor listed in the consensus, not just any descriptor.
347 - Bridge relays no longer print "xx=0" in their extrainfo document
348 for every single country code in the geoip db. Bugfix on
350 - Only warn when we fail to load the geoip file if we were planning to
351 include geoip stats in our extrainfo document. Bugfix on 0.2.0.27-rc.
352 - If we change our MaxAdvertisedBandwidth and then reload torrc,
353 Tor won't realize it should publish a new relay descriptor. Fixes
354 bug 688, reported by mfr. Bugfix on 0.1.2.x.
355 - When we haven't had any application requests lately, don't bother
356 logging that we have expired a bunch of descriptors. Bugfix
358 - Make relay cells written on a connection count as non-padding when
359 tracking how long a connection has been in use. Bugfix on
360 0.2.0.1-alpha. Spotted by lodger.
361 - Fix unit tests in 0.2.0.27-rc.
362 - Fix compile on Windows.
365 Changes in version 0.2.0.27-rc - 2008-06-03
366 Tor 0.2.0.27-rc adds a few features we left out of the earlier
367 release candidates. In particular, we now include an IP-to-country
368 GeoIP database, so controllers can easily look up what country a
369 given relay is in, and so bridge relays can give us some sanitized
370 summaries about which countries are making use of bridges. (See proposal
371 126-geoip-fetching.txt for details.)
374 - Include an IP-to-country GeoIP file in the tarball, so bridge
375 relays can report sanitized summaries of the usage they're seeing.
378 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
379 Robert Hogan. Fixes the first part of bug 681.
380 - Make bridge authorities never serve extrainfo docs.
381 - Add support to detect Libevent versions in the 1.4.x series
383 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
384 - Include a new contrib/tor-exit-notice.html file that exit relay
385 operators can put on their website to help reduce abuse queries.
388 - When tunneling an encrypted directory connection, and its first
389 circuit fails, do not leave it unattached and ask the controller
390 to deal. Fixes the second part of bug 681.
391 - Make bridge authorities correctly expire old extrainfo documents
395 Changes in version 0.2.0.26-rc - 2008-05-13
396 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
397 in Debian's OpenSSL packages. All users running any 0.2.0.x version
398 should upgrade, whether they're running Debian or not.
400 o Major security fixes:
401 - Use new V3 directory authority keys on the tor26, gabelmoo, and
402 moria1 V3 directory authorities. The old keys were generated with
403 a vulnerable version of Debian's OpenSSL package, and must be
404 considered compromised. Other authorities' keys were not generated
405 with an affected version of OpenSSL.
408 - List authority signatures as "unrecognized" based on DirServer
409 lines, not on cert cache. Bugfix on 0.2.0.x.
412 - Add a new V3AuthUseLegacyKey option to make it easier for
413 authorities to change their identity keys if they have to.
416 Changes in version 0.2.0.25-rc - 2008-04-23
417 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
420 - Remember to initialize threading before initializing logging.
421 Otherwise, many BSD-family implementations will crash hard on
422 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
425 - Authorities correctly free policies on bad servers on
426 exit. Fixes bug 672. Bugfix on 0.2.0.x.
429 Changes in version 0.2.0.24-rc - 2008-04-22
430 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
431 v3 directory authority, makes relays with dynamic IP addresses and no
432 DirPort notice more quickly when their IP address changes, fixes a few
433 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
435 o New directory authorities:
436 - Take lefkada out of the list of v3 directory authorities, since
437 it has been down for months.
438 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
442 - Detect address changes more quickly on non-directory mirror
443 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
445 o Minor features (security):
446 - Reject requests for reverse-dns lookup of names that are in
447 a private address space. Patch from lodger.
448 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
451 o Minor bugfixes (crashes):
452 - Avoid a rare assert that can trigger when Tor doesn't have much
453 directory information yet and it tries to fetch a v2 hidden
454 service descriptor. Fixes bug 651, reported by nwf.
455 - Initialize log mutex before initializing dmalloc. Otherwise,
456 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
457 - Use recursive pthread mutexes in order to avoid deadlock when
458 logging debug-level messages to a controller. Bug spotted by nwf,
459 bugfix on 0.2.0.16-alpha.
461 o Minor bugfixes (resource management):
462 - Keep address policies from leaking memory: start their refcount
463 at 1, not 2. Bugfix on 0.2.0.16-alpha.
464 - Free authority certificates on exit, so they don't look like memory
465 leaks. Bugfix on 0.2.0.19-alpha.
466 - Free static hashtables for policy maps and for TLS connections on
467 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
468 - Avoid allocating extra space when computing consensuses on 64-bit
469 platforms. Bug spotted by aakova.
471 o Minor bugfixes (misc):
472 - Do not read the configuration file when we've only been told to
473 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
474 based on patch from Sebastian Hahn.
475 - Exit relays that are used as a client can now reach themselves
476 using the .exit notation, rather than just launching an infinite
477 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
478 - When attempting to open a logfile fails, tell us why.
479 - Fix a dumb bug that was preventing us from knowing that we should
480 preemptively build circuits to handle expected directory requests.
481 Fixes bug 660. Bugfix on 0.1.2.x.
482 - Warn less verbosely about clock skew from netinfo cells from
483 untrusted sources. Fixes bug 663.
484 - Make controller stream events for DNS requests more consistent,
485 by adding "new stream" events for DNS requests, and removing
486 spurious "stream closed" events" for cached reverse resolves.
487 Patch from mwenge. Fixes bug 646.
488 - Correctly notify one-hop connections when a circuit build has
489 failed. Possible fix for bug 669. Found by lodger.
492 Changes in version 0.2.0.23-rc - 2008-03-24
493 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
494 makes bootstrapping faster if the first directory mirror you contact
495 is down. The bundles also include the new Vidalia 0.1.2 release.
498 - When a tunneled directory request is made to a directory server
499 that's down, notice after 30 seconds rather than 120 seconds. Also,
500 fail any begindir streams that are pending on it, so they can
501 retry elsewhere. This was causing multi-minute delays on bootstrap.
504 Changes in version 0.2.0.22-rc - 2008-03-18
505 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
506 enables encrypted directory connections by default for non-relays, fixes
507 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
508 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
511 - Enable encrypted directory connections by default for non-relays,
512 so censor tools that block Tor directory connections based on their
513 plaintext patterns will no longer work. This means Tor works in
514 certain censored countries by default again.
517 - Make sure servers always request certificates from clients during
518 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
519 - Do not enter a CPU-eating loop when a connection is closed in
520 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
521 diagnosed by lodger; bugfix on 0.2.0.20-rc.
522 - Fix assertion failure that could occur when a blocked circuit
523 became unblocked, and it had pending client DNS requests. Bugfix
524 on 0.2.0.1-alpha. Fixes bug 632.
526 o Minor bugfixes (on 0.1.2.x):
527 - Generate "STATUS_SERVER" events rather than misspelled
528 "STATUS_SEVER" events. Caught by mwenge.
529 - When counting the number of bytes written on a TLS connection,
530 look at the BIO actually used for writing to the network, not
531 at the BIO used (sometimes) to buffer data for the network.
532 Looking at different BIOs could result in write counts on the
533 order of ULONG_MAX. Fixes bug 614.
534 - On Windows, correctly detect errors when listing the contents of
535 a directory. Fix from lodger.
537 o Minor bugfixes (on 0.2.0.x):
538 - Downgrade "sslv3 alert handshake failure" message to INFO.
539 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
540 left BandwidthRate and BandwidthBurst at the default, we would be
541 silently limited by those defaults. Now raise them to match the
542 RelayBandwidth* values.
543 - Fix the SVK version detection logic to work correctly on a branch.
544 - Make --enable-openbsd-malloc work correctly on Linux with alpha
546 - Logging functions now check that the passed severity is sane.
547 - Use proper log levels in the testsuite call of
548 get_interface_address6().
549 - When using a nonstandard malloc, do not use the platform values for
550 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
551 - Make the openbsd malloc code use 8k pages on alpha CPUs and
553 - Detect mismatched page sizes when using --enable-openbsd-malloc.
554 - Avoid double-marked-for-close warning when certain kinds of invalid
555 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
556 for bug 617. Bugfix on 0.2.0.1-alpha.
557 - Make sure that the "NULL-means-reject *:*" convention is followed by
558 all the policy manipulation functions, avoiding some possible crash
559 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
560 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
561 actually works, and doesn't warn about every single reverse lookup.
562 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
565 - Only log guard node status when guard node status has changed.
566 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
567 make "INFO" 75% less verbose.
570 Changes in version 0.2.0.21-rc - 2008-03-02
571 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
572 makes Tor work well with Vidalia again, fixes a rare assert bug,
573 and fixes a pair of more minor bugs. The bundles also include Vidalia
574 0.1.0 and Torbutton 1.1.16.
577 - The control port should declare that it requires password auth
578 when HashedControlSessionPassword is set too. Patch from Matt Edman;
579 bugfix on 0.2.0.20-rc. Fixes bug 615.
580 - Downgrade assert in connection_buckets_decrement() to a log message.
581 This may help us solve bug 614, and in any case will make its
582 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
583 - We were sometimes miscounting the number of bytes read from the
584 network, causing our rate limiting to not be followed exactly.
585 Bugfix on 0.2.0.16-alpha. Reported by lodger.
588 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
589 OpenSSL versions should have been working fine. Diagnosis and patch
590 from lodger, Karsten Loesing, and Sebastian Hahn. Fixes bug 616.
591 Bugfix on 0.2.0.20-rc.
594 Changes in version 0.2.0.20-rc - 2008-02-24
595 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
596 makes more progress towards normalizing Tor's TLS handshake, makes
597 hidden services work better again, helps relays bootstrap if they don't
598 know their IP address, adds optional support for linking in openbsd's
599 allocator or tcmalloc, allows really fast relays to scale past 15000
600 sockets, and fixes a bunch of minor bugs reported by Veracode.
603 - Enable the revised TLS handshake based on the one designed by
604 Steven Murdoch in proposal 124, as revised in proposal 130. It
605 includes version negotiation for OR connections as described in
606 proposal 105. The new handshake is meant to be harder for censors
607 to fingerprint, and it adds the ability to detect certain kinds of
608 man-in-the-middle traffic analysis attacks. The version negotiation
609 feature will allow us to improve Tor's link protocol more safely
611 - Choose which bridge to use proportional to its advertised bandwidth,
612 rather than uniformly at random. This should speed up Tor for
613 bridge users. Also do this for people who set StrictEntryNodes.
614 - When a TrackHostExits-chosen exit fails too many times in a row,
615 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
618 - Resolved problems with (re-)fetching hidden service descriptors.
619 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
621 - If we only ever used Tor for hidden service lookups or posts, we
622 would stop building circuits and start refusing connections after
623 24 hours, since we falsely believed that Tor was dormant. Reported
624 by nwf; bugfix on 0.1.2.x.
625 - Servers that don't know their own IP address should go to the
626 authorities for their first directory fetch, even if their DirPort
627 is off or if they don't know they're reachable yet. This will help
628 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
629 - When counting the number of open sockets, count not only the number
630 of sockets we have received from the socket() call, but also
631 the number we've gotten from accept() and socketpair(). This bug
632 made us fail to count all sockets that we were using for incoming
633 connections. Bugfix on 0.2.0.x.
634 - Fix code used to find strings within buffers, when those strings
635 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
636 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
637 - Add a new __HashedControlSessionPassword option for controllers
638 to use for one-off session password hashes that shouldn't get
639 saved to disk by SAVECONF --- Vidalia users were accumulating a
640 pile of HashedControlPassword lines in their torrc files, one for
641 each time they had restarted Tor and then clicked Save. Make Tor
642 automatically convert "HashedControlPassword" to this new option but
643 only when it's given on the command line. Partial fix for bug 586.
645 o Minor features (performance):
646 - Tune parameters for cell pool allocation to minimize amount of
648 - Add OpenBSD malloc code from phk as an optional malloc
649 replacement on Linux: some glibc libraries do very poorly
650 with Tor's memory allocation patterns. Pass
651 --enable-openbsd-malloc to get the replacement malloc code.
652 - Add a --with-tcmalloc option to the configure script to link
653 against tcmalloc (if present). Does not yet search for
654 non-system include paths.
655 - Stop imposing an arbitrary maximum on the number of file descriptors
656 used for busy servers. Bug reported by Olaf Selke; patch from
659 o Minor features (other):
660 - When SafeLogging is disabled, log addresses along with all TLS
662 - When building with --enable-gcc-warnings, check for whether Apple's
663 warning "-Wshorten-64-to-32" is available.
664 - Add a --passphrase-fd argument to the tor-gencert command for
667 o Minor bugfixes (memory leaks and code problems):
668 - We were leaking a file descriptor if Tor started with a zero-length
669 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
670 - Detect size overflow in zlib code. Reported by Justin Ferguson and
672 - We were comparing the raw BridgePassword entry with a base64'ed
673 version of it, when handling a "/tor/networkstatus-bridges"
674 directory request. Now compare correctly. Noticed by Veracode.
675 - Recover from bad tracked-since value in MTBF-history file.
677 - Alter the code that tries to recover from unhandled write
678 errors, to not try to flush onto a socket that's given us
679 unhandled errors. Bugfix on 0.1.2.x.
680 - Make Unix controlsockets work correctly on OpenBSD. Patch from
681 tup. Bugfix on 0.2.0.3-alpha.
683 o Minor bugfixes (other):
684 - If we have an extra-info document for our server, always make
685 it available on the control port, even if we haven't gotten
686 a copy of it from an authority yet. Patch from mwenge.
687 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
688 - Directory mirrors no longer include a guess at the client's IP
689 address if the connection appears to be coming from the same /24
690 network; it was producing too many wrong guesses.
691 - Make the new hidden service code respect the SafeLogging setting.
692 Bugfix on 0.2.0.x. Patch from Karsten.
693 - When starting as an authority, do not overwrite all certificates
694 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
695 - If we're trying to flush the last bytes on a connection (for
696 example, when answering a directory request), reset the
697 time-to-give-up timeout every time we manage to write something
698 on the socket. Bugfix on 0.1.2.x.
699 - Change the behavior of "getinfo status/good-server-descriptor"
700 so it doesn't return failure when any authority disappears.
701 - Even though the man page said that "TrackHostExits ." should
702 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
703 - Report TLS "zero return" case as a "clean close" and "IO error"
704 as a "close". Stop calling closes "unexpected closes": existing
705 Tors don't use SSL_close(), so having a connection close without
706 the TLS shutdown handshake is hardly unexpected.
707 - Send NAMESERVER_STATUS messages for a single failed nameserver
710 o Code simplifications and refactoring:
711 - Remove the tor_strpartition function: its logic was confused,
712 and it was only used for one thing that could be implemented far
716 Changes in version 0.2.0.19-alpha - 2008-02-09
717 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
718 handshake, makes path selection for relays more secure and IP address
719 guessing more robust, and generally fixes a lot of bugs in preparation
720 for calling the 0.2.0 branch stable.
723 - Do not include recognizeable strings in the commonname part of
724 Tor's x509 certificates.
727 - If we're a relay, avoid picking ourselves as an introduction point,
728 a rendezvous point, or as the final hop for internal circuits. Bug
729 reported by taranis and lodger. Bugfix on 0.1.2.x.
730 - Patch from "Andrew S. Lists" to catch when we contact a directory
731 mirror at IP address X and he says we look like we're coming from
732 IP address X. Bugfix on 0.1.2.x.
734 o Minor features (security):
735 - Be more paranoid about overwriting sensitive memory on free(),
736 as a defensive programming tactic to ensure forward secrecy.
738 o Minor features (directory authority):
739 - Actually validate the options passed to AuthDirReject,
740 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
741 - Reject router descriptors with out-of-range bandwidthcapacity or
742 bandwidthburst values.
744 o Minor features (controller):
745 - Reject controller commands over 1MB in length. This keeps rogue
746 processes from running us out of memory.
748 o Minor features (misc):
749 - Give more descriptive well-formedness errors for out-of-range
750 hidden service descriptor/protocol versions.
751 - Make memory debugging information describe more about history
752 of cell allocation, so we can help reduce our memory use.
754 o Deprecated features (controller):
755 - The status/version/num-versioning and status/version/num-concurring
756 GETINFO options are no longer useful in the v3 directory protocol:
757 treat them as deprecated, and warn when they're used.
760 - When our consensus networkstatus has been expired for a while, stop
761 being willing to build circuits using it. Fixes bug 401. Bugfix
763 - Directory caches now fetch certificates from all authorities
764 listed in a networkstatus consensus, even when they do not
765 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
766 - When connecting to a bridge without specifying its key, insert
767 the connection into the identity-to-connection map as soon as
768 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
769 - Detect versions of OS X where malloc_good_size() is present in the
770 library but never actually declared. Resolves bug 587. Bugfix
772 - Stop incorrectly truncating zlib responses to directory authority
773 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
774 - Stop recommending that every server operator send mail to tor-ops.
775 Resolves bug 597. Bugfix on 0.1.2.x.
776 - Don't trigger an assert if we start a directory authority with a
777 private IP address (like 127.0.0.1).
778 - Avoid possible failures when generating a directory with routers
779 with over-long versions strings, or too many flags set. Bugfix
781 - If an attempt to launch a DNS resolve request over the control
782 port fails because we have overrun the limit on the number of
783 connections, tell the controller that the request has failed.
784 - Avoid using too little bandwidth when our clock skips a few
785 seconds. Bugfix on 0.1.2.x.
786 - Fix shell error when warning about missing packages in configure
787 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
788 - Do not become confused when receiving a spurious VERSIONS-like
789 cell from a confused v1 client. Bugfix on 0.2.0.x.
790 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
791 introduction points for a hidden service have failed. Patch from
792 Karsten Loesing. Bugfix on 0.2.0.x.
794 o Code simplifications and refactoring:
795 - Remove some needless generality from cpuworker code, for improved
797 - Stop overloading the circuit_t.onionskin field for both "onionskin
798 from a CREATE cell that we are waiting for a cpuworker to be
799 assigned" and "onionskin from an EXTEND cell that we are going to
800 send to an OR as soon as we are connected". Might help with bug 600.
801 - Add an in-place version of aes_crypt() so that we can avoid doing a
802 needless memcpy() call on each cell payload.
805 Changes in version 0.2.0.18-alpha - 2008-01-25
806 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
807 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
808 that can warn or reject connections to ports generally associated with
809 vulnerable-plaintext protocols.
811 o New directory authorities:
812 - Set up dannenberg (run by CCC) as the sixth v3 directory
816 - Fix a major memory leak when attempting to use the v2 TLS
817 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
818 - We accidentally enabled the under-development v2 TLS handshake
819 code, which was causing log entries like "TLS error while
820 renegotiating handshake". Disable it again. Resolves bug 590.
821 - We were computing the wrong Content-Length: header for directory
822 responses that need to be compressed on the fly, causing clients
823 asking for those items to always fail. Bugfix on 0.2.0.x; partially
827 - Avoid going directly to the directory authorities even if you're a
828 relay, if you haven't found yourself reachable yet or if you've
829 decided not to advertise your dirport yet. Addresses bug 556.
830 - If we've gone 12 hours since our last bandwidth check, and we
831 estimate we have less than 50KB bandwidth capacity but we could
832 handle more, do another bandwidth test.
833 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
834 Tor can warn and/or refuse connections to ports commonly used with
835 vulnerable-plaintext protocols. Currently we warn on ports 23,
836 109, 110, and 143, but we don't reject any.
839 - When we setconf ClientOnly to 1, close any current OR and Dir
840 listeners. Reported by mwenge.
841 - When we get a consensus that's been signed by more people than
842 we expect, don't log about it; it's not a big deal. Reported
846 - Don't answer "/tor/networkstatus-bridges" directory requests if
847 the request isn't encrypted.
848 - Make "ClientOnly 1" config option disable directory ports too.
849 - Patches from Karsten Loesing to make v2 hidden services more
850 robust: work even when there aren't enough HSDir relays available;
851 retry when a v2 rend desc fetch fails; but don't retry if we
852 already have a usable v0 rend desc.
855 Changes in version 0.2.0.17-alpha - 2008-01-17
856 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
859 - Make the tor-gencert man page get included correctly in the tarball.
862 Changes in version 0.2.0.16-alpha - 2008-01-17
863 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
864 Loesing, and generally cleans up a lot of features and minor bugs.
866 o New directory authorities:
867 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
870 o Major performance improvements:
871 - Switch our old ring buffer implementation for one more like that
872 used by free Unix kernels. The wasted space in a buffer with 1mb
873 of data will now be more like 8k than 1mb. The new implementation
874 also avoids realloc();realloc(); patterns that can contribute to
875 memory fragmentation.
878 - Configuration files now accept C-style strings as values. This
879 helps encode characters not allowed in the current configuration
880 file format, such as newline or #. Addresses bug 557.
881 - Although we fixed bug 539 (where servers would send HTTP status 503
882 responses _and_ send a body too), there are still servers out
883 there that haven't upgraded. Therefore, make clients parse such
884 bodies when they receive them.
885 - When we're not serving v2 directory information, there is no reason
886 to actually keep any around. Remove the obsolete files and directory
887 on startup if they are very old and we aren't going to serve them.
889 o Minor performance improvements:
890 - Reference-count and share copies of address policy entries; only 5%
891 of them were actually distinct.
892 - Never walk through the list of logs if we know that no log is
893 interested in a given message.
896 - When an authority has not signed a consensus, do not try to
897 download a nonexistent "certificate with key 00000000". Bugfix
898 on 0.2.0.x. Fixes bug 569.
899 - Fix a rare assert error when we're closing one of our threads:
900 use a mutex to protect the list of logs, so we never write to the
901 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
902 bug 575, which is kind of the revenge of bug 222.
903 - Patch from Karsten Loesing to complain less at both the client
904 and the relay when a relay used to have the HSDir flag but doesn't
905 anymore, and we try to upload a hidden service descriptor.
906 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
908 - Do not try to download missing certificates until we have tried
909 to check our fallback consensus. Fixes bug 583.
910 - Make bridges round reported GeoIP stats info up to the nearest
911 estimate, not down. Now we can distinguish between "0 people from
912 this country" and "1 person from this country".
913 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
914 - Avoid possible segfault if key generation fails in
915 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
916 - Avoid segfault in the case where a badly behaved v2 versioning
917 directory sends a signed networkstatus with missing client-versions.
919 - Avoid segfaults on certain complex invocations of
920 router_get_by_hexdigest(). Bugfix on 0.1.2.
921 - Correct bad index on array access in parse_http_time(). Bugfix
923 - Fix possible bug in vote generation when server versions are present
924 but client versions are not.
925 - Fix rare bug on REDIRECTSTREAM control command when called with no
926 port set: it could erroneously report an error when none had
928 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
929 compressing large objects and find ourselves with more than 4k
930 left over. Bugfix on 0.2.0.
931 - Fix a small memory leak when setting up a hidden service.
932 - Fix a few memory leaks that could in theory happen under bizarre
934 - Fix an assert if we post a general-purpose descriptor via the
935 control port but that descriptor isn't mentioned in our current
936 network consensus. Bug reported by Jon McLachlan; bugfix on
939 o Minor features (controller):
940 - Get NS events working again. Patch from tup.
941 - The GETCONF command now escapes and quotes configuration values
942 that don't otherwise fit into the torrc file.
943 - The SETCONF command now handles quoted values correctly.
945 o Minor features (directory authorities):
946 - New configuration options to override default maximum number of
947 servers allowed on a single IP address. This is important for
948 running a test network on a single host.
949 - Actually implement the -s option to tor-gencert.
950 - Add a manual page for tor-gencert.
952 o Minor features (bridges):
953 - Bridge authorities no longer serve bridge descriptors over
954 unencrypted connections.
956 o Minor features (other):
957 - Add hidden services and DNSPorts to the list of things that make
958 Tor accept that it has running ports. Change starting Tor with no
959 ports from a fatal error to a warning; we might change it back if
960 this turns out to confuse anybody. Fixes bug 579.
963 Changes in version 0.1.2.19 - 2008-01-17
964 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
965 exit policy a little bit more conservative so it's safer to run an
966 exit relay on a home system, and fixes a variety of smaller issues.
969 - Exit policies now reject connections that are addressed to a
970 relay's public (external) IP address too, unless
971 ExitPolicyRejectPrivate is turned off. We do this because too
972 many relays are running nearby to services that trust them based
976 - When the clock jumps forward a lot, do not allow the bandwidth
977 buckets to become negative. Fixes bug 544.
978 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
979 on every successful resolve. Reported by Mike Perry.
980 - Purge old entries from the "rephist" database and the hidden
981 service descriptor database even when DirPort is zero.
982 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
983 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
984 crashing or mis-answering these requests.
985 - When we decide to send a 503 response to a request for servers, do
986 not then also send the server descriptors: this defeats the whole
987 purpose. Fixes bug 539.
990 - Changing the ExitPolicyRejectPrivate setting should cause us to
991 rebuild our server descriptor.
992 - Fix handling of hex nicknames when answering controller requests for
993 networkstatus by name, or when deciding whether to warn about
994 unknown routers in a config option. (Patch from mwenge.)
995 - Fix a couple of hard-to-trigger autoconf problems that could result
996 in really weird results on platforms whose sys/types.h files define
997 nonstandard integer types.
998 - Don't try to create the datadir when running --verify-config or
999 --hash-password. Resolves bug 540.
1000 - If we were having problems getting a particular descriptor from the
1001 directory caches, and then we learned about a new descriptor for
1002 that router, we weren't resetting our failure count. Reported
1004 - Although we fixed bug 539 (where servers would send HTTP status 503
1005 responses _and_ send a body too), there are still servers out there
1006 that haven't upgraded. Therefore, make clients parse such bodies
1007 when they receive them.
1008 - Run correctly on systems where rlim_t is larger than unsigned long.
1009 This includes some 64-bit systems.
1010 - Run correctly on platforms (like some versions of OS X 10.5) where
1011 the real limit for number of open files is OPEN_FILES, not rlim_max
1012 from getrlimit(RLIMIT_NOFILES).
1013 - Avoid a spurious free on base64 failure.
1014 - Avoid segfaults on certain complex invocations of
1015 router_get_by_hexdigest().
1016 - Fix rare bug on REDIRECTSTREAM control command when called with no
1017 port set: it could erroneously report an error when none had
1021 Changes in version 0.2.0.15-alpha - 2007-12-25
1022 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
1023 features added in 0.2.0.13-alpha.
1026 - Fix several remotely triggerable asserts based on DirPort requests
1027 for a v2 or v3 networkstatus object before we were prepared. This
1028 was particularly bad for 0.2.0.13 and later bridge relays, who
1029 would never have a v2 networkstatus and would thus always crash
1030 when used. Bugfixes on 0.2.0.x.
1031 - Estimate the v3 networkstatus size more accurately, rather than
1032 estimating it at zero bytes and giving it artificially high priority
1033 compared to other directory requests. Bugfix on 0.2.0.x.
1036 - Fix configure.in logic for cross-compilation.
1037 - When we load a bridge descriptor from the cache, and it was
1038 previously unreachable, mark it as retriable so we won't just
1039 ignore it. Also, try fetching a new copy immediately. Bugfixes
1041 - The bridge GeoIP stats were counting other relays, for example
1042 self-reachability and authority-reachability tests.
1045 - Support compilation to target iPhone; patch from cjacker huang.
1046 To build for iPhone, pass the --enable-iphone option to configure.
1049 Changes in version 0.2.0.14-alpha - 2007-12-23
1051 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
1052 without a datadirectory from a previous Tor install. Reported
1054 - Fix a crash when we fetch a descriptor that turns out to be
1055 unexpected (it used to be in our networkstatus when we started
1056 fetching it, but it isn't in our current networkstatus), and we
1057 aren't using bridges. Bugfix on 0.2.0.x.
1058 - Fix a crash when accessing hidden services: it would work the first
1059 time you use a given introduction point for your service, but
1060 on subsequent requests we'd be using garbage memory. Fixed by
1061 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
1062 - Fix a crash when we load a bridge descriptor from disk but we don't
1063 currently have a Bridge line for it in our torrc. Bugfix on
1067 - If bridge authorities set BridgePassword, they will serve a
1068 snapshot of known bridge routerstatuses from their DirPort to
1069 anybody who knows that password. Unset by default.
1072 - Make the unit tests build again.
1073 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
1074 - Make PublishServerDescriptor default to 1, so the default doesn't
1075 have to change as we invent new directory protocol versions.
1076 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
1077 be included unless sys/time.h is already included. Fixes
1078 bug 553. Bugfix on 0.2.0.x.
1079 - If we receive a general-purpose descriptor and then receive an
1080 identical bridge-purpose descriptor soon after, don't discard
1081 the next one as a duplicate.
1084 - If BridgeRelay is set to 1, then the default for
1085 PublishServerDescriptor is now "bridge" rather than "v2,v3".
1086 - If the user sets RelayBandwidthRate but doesn't set
1087 RelayBandwidthBurst, then make them equal rather than erroring out.
1090 Changes in version 0.2.0.13-alpha - 2007-12-21
1091 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
1092 Goodell, fixes many more bugs, and adds a lot of infrastructure for
1095 o New directory authorities:
1096 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
1100 - Only update guard status (usable / not usable) once we have
1101 enough directory information. This was causing us to always pick
1102 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
1103 causing us to discard all our guards on startup if we hadn't been
1104 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
1105 - Purge old entries from the "rephist" database and the hidden
1106 service descriptor databases even when DirPort is zero. Bugfix
1108 - We were ignoring our RelayBandwidthRate for the first 30 seconds
1109 after opening a circuit -- even a relayed circuit. Bugfix on
1111 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
1112 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
1113 crashing or mis-answering these types of requests.
1114 - Relays were publishing their server descriptor to v1 and v2
1115 directory authorities, but they didn't try publishing to v3-only
1116 authorities. Fix this; and also stop publishing to v1 authorities.
1118 - When we were reading router descriptors from cache, we were ignoring
1119 the annotations -- so for example we were reading in bridge-purpose
1120 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
1121 - When we decided to send a 503 response to a request for servers, we
1122 were then also sending the server descriptors: this defeats the
1123 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
1126 - Bridge relays now behave like clients with respect to time
1127 intervals for downloading new consensus documents -- otherwise they
1128 stand out. Bridge users now wait until the end of the interval,
1129 so their bridge relay will be sure to have a new consensus document.
1130 - Three new config options (AlternateDirAuthority,
1131 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
1132 user selectively replace the default directory authorities by type,
1133 rather than the all-or-nothing replacement that DirServer offers.
1134 - Tor can now be configured to read a GeoIP file from disk in one
1135 of two formats. This can be used by controllers to map IP addresses
1136 to countries. Eventually, it may support exit-by-country.
1137 - When possible, bridge relays remember which countries users
1138 are coming from, and report aggregate information in their
1139 extra-info documents, so that the bridge authorities can learn
1140 where Tor is blocked.
1141 - Bridge directory authorities now do reachability testing on the
1142 bridges they know. They provide router status summaries to the
1143 controller via "getinfo ns/purpose/bridge", and also dump summaries
1144 to a file periodically.
1145 - Stop fetching directory info so aggressively if your DirPort is
1146 on but your ORPort is off; stop fetching v2 dir info entirely.
1147 You can override these choices with the new FetchDirInfoEarly
1151 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
1152 consensus documents when there are too many relays at a single
1153 IP address. Now clear it in v2 network status documents too, and
1154 also clear it in routerinfo_t when the relay is no longer listed
1155 in the relevant networkstatus document.
1156 - Don't crash if we get an unexpected value for the
1157 PublishServerDescriptor config option. Reported by Matt Edman;
1158 bugfix on 0.2.0.9-alpha.
1159 - Our new v2 hidden service descriptor format allows descriptors
1160 that have no introduction points. But Tor crashed when we tried
1161 to build a descriptor with no intro points (and it would have
1162 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
1164 - Fix building with dmalloc 5.5.2 with glibc.
1165 - Reject uploaded descriptors and extrainfo documents if they're
1166 huge. Otherwise we'll cache them all over the network and it'll
1167 clog everything up. Reported by Aljosha Judmayer.
1168 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
1169 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
1170 - When the DANGEROUS_VERSION controller status event told us we're
1171 running an obsolete version, it used the string "OLD" to describe
1172 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
1173 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
1174 - If we can't expand our list of entry guards (e.g. because we're
1175 using bridges or we have StrictEntryNodes set), don't mark relays
1176 down when they fail a directory request. Otherwise we're too quick
1177 to mark all our entry points down. Bugfix on 0.1.2.x.
1178 - Fix handling of hex nicknames when answering controller requests for
1179 networkstatus by name, or when deciding whether to warn about unknown
1180 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
1181 - Fix a couple of hard-to-trigger autoconf problems that could result
1182 in really weird results on platforms whose sys/types.h files define
1183 nonstandard integer types. Bugfix on 0.1.2.x.
1184 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
1185 - Don't crash on name lookup when we have no current consensus. Fixes
1186 bug 538; bugfix on 0.2.0.x.
1187 - Only Tors that want to mirror the v2 directory info should
1188 create the "cached-status" directory in their datadir. (All Tors
1189 used to create it.) Bugfix on 0.2.0.9-alpha.
1190 - Directory authorities should only automatically download Extra Info
1191 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
1194 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
1195 consumers. (We already do this on HUP.)
1196 - Authorities and caches fetch the v2 networkstatus documents
1197 less often, now that v3 is encouraged.
1198 - Add a new config option BridgeRelay that specifies you want to
1199 be a bridge relay. Right now the only difference is that it makes
1200 you answer begin_dir requests, and it makes you cache dir info,
1201 even if your DirPort isn't on.
1202 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
1203 ask about source, timestamp of arrival, purpose, etc. We need
1204 something like this to help Vidalia not do GeoIP lookups on bridge
1206 - Allow multiple HashedControlPassword config lines, to support
1207 multiple controller passwords.
1208 - Authorities now decide whether they're authoritative for a given
1209 router based on the router's purpose.
1210 - New config options AuthDirBadDir and AuthDirListBadDirs for
1211 authorities to mark certain relays as "bad directories" in the
1212 networkstatus documents. Also supports the "!baddir" directive in
1213 the approved-routers file.
1216 Changes in version 0.2.0.12-alpha - 2007-11-16
1217 This twelfth development snapshot fixes some more build problems as
1218 well as a few minor bugs.
1221 - Make it build on OpenBSD again. Patch from tup.
1222 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
1223 package-building for Red Hat, OS X, etc.
1225 o Minor bugfixes (on 0.1.2.x):
1226 - Changing the ExitPolicyRejectPrivate setting should cause us to
1227 rebuild our server descriptor.
1229 o Minor bugfixes (on 0.2.0.x):
1230 - When we're lacking a consensus, don't try to perform rendezvous
1231 operations. Reported by Karsten Loesing.
1232 - Fix a small memory leak whenever we decide against using a
1233 newly picked entry guard. Reported by Mike Perry.
1234 - When authorities detected more than two relays running on the same
1235 IP address, they were clearing all the status flags but forgetting
1236 to clear the "hsdir" flag. So clients were being told that a
1237 given relay was the right choice for a v2 hsdir lookup, yet they
1238 never had its descriptor because it was marked as 'not running'
1240 - If we're trying to fetch a bridge descriptor and there's no way
1241 the bridge authority could help us (for example, we don't know
1242 a digest, or there is no bridge authority), don't be so eager to
1243 fall back to asking the bridge authority.
1244 - If we're using bridges or have strictentrynodes set, and our
1245 chosen exit is in the same family as all our bridges/entry guards,
1246 then be flexible about families.
1249 - When we negotiate a v2 link-layer connection (not yet implemented),
1250 accept RELAY_EARLY cells and turn them into RELAY cells if we've
1251 negotiated a v1 connection for their next step. Initial code for
1255 Changes in version 0.2.0.11-alpha - 2007-11-12
1256 This eleventh development snapshot fixes some build problems with
1257 the previous snapshot. It also includes a more secure-by-default exit
1258 policy for relays, fixes an enormous memory leak for exit relays, and
1259 fixes another bug where servers were falling out of the directory list.
1262 - Exit policies now reject connections that are addressed to a
1263 relay's public (external) IP address too, unless
1264 ExitPolicyRejectPrivate is turned off. We do this because too
1265 many relays are running nearby to services that trust them based
1266 on network address. Bugfix on 0.1.2.x.
1269 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
1270 on every successful resolve. Reported by Mike Perry; bugfix
1272 - On authorities, never downgrade to old router descriptors simply
1273 because they're listed in the consensus. This created a catch-22
1274 where we wouldn't list a new descriptor because there was an
1275 old one in the consensus, and we couldn't get the new one in the
1276 consensus because we wouldn't list it. Possible fix for bug 548.
1277 Also, this might cause bug 543 to appear on authorities; if so,
1278 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
1280 o Packaging fixes on 0.2.0.10-alpha:
1281 - We were including instructions about what to do with the
1282 src/config/fallback-consensus file, but we weren't actually
1283 including it in the tarball. Disable all of that for now.
1286 - Allow people to say PreferTunnelledDirConns rather than
1287 PreferTunneledDirConns, for those alternate-spellers out there.
1290 - Don't reevaluate all the information from our consensus document
1291 just because we've downloaded a v2 networkstatus that we intend
1292 to cache. Fixes bug 545; bugfix on 0.2.0.x.
1295 Changes in version 0.2.0.10-alpha - 2007-11-10
1296 This tenth development snapshot adds a third v3 directory authority
1297 run by Mike Perry, adds most of Karsten Loesing's new hidden service
1298 descriptor format, fixes a bad crash bug and new bridge bugs introduced
1299 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
1300 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
1301 addresses many more minor issues.
1303 o New directory authorities:
1304 - Set up ides (run by Mike Perry) as the third v3 directory authority.
1307 - Allow tunnelled directory connections to ask for an encrypted
1308 "begin_dir" connection or an anonymized "uses a full Tor circuit"
1309 connection independently. Now we can make anonymized begin_dir
1310 connections for (e.g.) more secure hidden service posting and
1312 - More progress on proposal 114: code from Karsten Loesing to
1313 implement new hidden service descriptor format.
1314 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
1315 accommodate the growing number of servers that use the default
1316 and are reaching it.
1317 - Directory authorities use a new formula for selecting which nodes
1318 to advertise as Guards: they must be in the top 7/8 in terms of
1319 how long we have known about them, and above the median of those
1320 nodes in terms of weighted fractional uptime.
1321 - Make "not enough dir info yet" warnings describe *why* Tor feels
1322 it doesn't have enough directory info yet.
1325 - Stop servers from crashing if they set a Family option (or
1326 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
1328 - Make bridge users work again -- the move to v3 directories in
1329 0.2.0.9-alpha had introduced a number of bugs that made bridges
1330 no longer work for clients.
1331 - When the clock jumps forward a lot, do not allow the bandwidth
1332 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
1334 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
1335 - When the consensus lists a router descriptor that we previously were
1336 mirroring, but that we considered non-canonical, reload the
1337 descriptor as canonical. This fixes bug 543 where Tor servers
1338 would start complaining after a few days that they don't have
1339 enough directory information to build a circuit.
1340 - Consider replacing the current consensus when certificates arrive
1341 that make the pending consensus valid. Previously, we were only
1342 considering replacement when the new certs _didn't_ help.
1343 - Fix an assert error on startup if we didn't already have the
1344 consensus and certs cached in our datadirectory: we were caching
1345 the consensus in consensus_waiting_for_certs but then free'ing it
1347 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
1348 Request) if we need more v3 certs but we've already got pending
1349 requests for all of them.
1350 - Correctly back off from failing certificate downloads. Fixes
1352 - Authorities don't vote on the Running flag if they have been running
1353 for less than 30 minutes themselves. Fixes bug 547, where a newly
1354 started authority would vote that everyone was down.
1357 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
1358 it, it had no AES, and it hasn't seen any security patches since
1362 - Clients now hold circuitless TLS connections open for 1.5 times
1363 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
1364 rebuild a new circuit over them within that timeframe. Previously,
1365 they held them open only for KeepalivePeriod (5 minutes).
1366 - Use "If-Modified-Since" to avoid retrieving consensus
1367 networkstatuses that we already have.
1368 - When we have no consensus, check FallbackNetworkstatusFile (defaults
1369 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
1370 we start knowing some directory caches.
1371 - When we receive a consensus from the future, warn about skew.
1372 - Improve skew reporting: try to give the user a better log message
1373 about how skewed they are, and how much this matters.
1374 - When we have a certificate for an authority, believe that
1375 certificate's claims about the authority's IP address.
1376 - New --quiet command-line option to suppress the default console log.
1377 Good in combination with --hash-password.
1378 - Authorities send back an X-Descriptor-Not-New header in response to
1379 an accepted-but-discarded descriptor upload. Partially implements
1381 - Make the log message for "tls error. breaking." more useful.
1382 - Better log messages about certificate downloads, to attempt to
1383 track down the second incarnation of bug 546.
1385 o Minor features (bridges):
1386 - If bridge users set UpdateBridgesFromAuthority, but the digest
1387 they ask for is a 404 from the bridge authority, they now fall
1388 back to trying the bridge directly.
1389 - Bridges now use begin_dir to publish their server descriptor to
1390 the bridge authority, even when they haven't set TunnelDirConns.
1392 o Minor features (controller):
1393 - When reporting clock skew, and we know that the clock is _at least
1394 as skewed_ as some value, but we don't know the actual value,
1395 report the value as a "minimum skew."
1398 - Update linux-tor-prio.sh script to allow QoS based on the uid of
1399 the Tor process. Patch from Marco Bonetti with tweaks from Mike
1403 - Refuse to start if both ORPort and UseBridges are set. Bugfix
1404 on 0.2.0.x, suggested by Matt Edman.
1405 - Don't stop fetching descriptors when FetchUselessDescriptors is
1406 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
1407 reported by tup and ioerror.
1408 - Better log message on vote from unknown authority.
1409 - Don't log "Launching 0 request for 0 router" message.
1411 o Minor bugfixes (memory leaks):
1412 - Stop leaking memory every time we parse a v3 certificate. Bugfix
1414 - Stop leaking memory every time we load a v3 certificate. Bugfix
1415 on 0.2.0.1-alpha. Fixes bug 536.
1416 - Stop leaking a cached networkstatus on exit. Bugfix on
1418 - Stop leaking voter information every time we free a consensus.
1419 Bugfix on 0.2.0.3-alpha.
1420 - Stop leaking signed data every time we check a voter signature.
1421 Bugfix on 0.2.0.3-alpha.
1422 - Stop leaking a signature every time we fail to parse a consensus or
1423 a vote. Bugfix on 0.2.0.3-alpha.
1424 - Stop leaking v2_download_status_map on shutdown. Bugfix on
1426 - Stop leaking conn->nickname every time we make a connection to a
1427 Tor relay without knowing its expected identity digest (e.g. when
1428 using bridges). Bugfix on 0.2.0.3-alpha.
1430 - Minor bugfixes (portability):
1431 - Run correctly on platforms where rlim_t is larger than unsigned
1432 long, and/or where the real limit for number of open files is
1433 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
1434 particular, these may be needed for OS X 10.5.
1437 Changes in version 0.1.2.18 - 2007-10-28
1438 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
1439 hidden service introduction that were causing huge delays, and a big
1440 bug that was causing some servers to disappear from the network status
1441 lists for a few hours each day.
1443 o Major bugfixes (crashes):
1444 - If a connection is shut down abruptly because of something that
1445 happened inside connection_flushed_some(), do not call
1446 connection_finished_flushing(). Should fix bug 451:
1447 "connection_stop_writing: Assertion conn->write_event failed"
1448 Bugfix on 0.1.2.7-alpha.
1449 - Fix possible segfaults in functions called from
1450 rend_process_relay_cell().
1452 o Major bugfixes (hidden services):
1453 - Hidden services were choosing introduction points uniquely by
1454 hexdigest, but when constructing the hidden service descriptor
1455 they merely wrote the (potentially ambiguous) nickname.
1456 - Clients now use the v2 intro format for hidden service
1457 connections: they specify their chosen rendezvous point by identity
1458 digest rather than by (potentially ambiguous) nickname. These
1459 changes could speed up hidden service connections dramatically.
1461 o Major bugfixes (other):
1462 - Stop publishing a new server descriptor just because we get a
1463 HUP signal. This led (in a roundabout way) to some servers getting
1464 dropped from the networkstatus lists for a few hours each day.
1465 - When looking for a circuit to cannibalize, consider family as well
1466 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
1467 circuit cannibalization).
1468 - When a router wasn't listed in a new networkstatus, we were leaving
1469 the flags for that router alone -- meaning it remained Named,
1470 Running, etc -- even though absence from the networkstatus means
1471 that it shouldn't be considered to exist at all anymore. Now we
1472 clear all the flags for routers that fall out of the networkstatus
1473 consensus. Fixes bug 529.
1476 - Don't try to access (or alter) the state file when running
1477 --list-fingerprint or --verify-config or --hash-password. Resolves
1479 - When generating information telling us how to extend to a given
1480 router, do not try to include the nickname if it is
1481 absent. Resolves bug 467.
1482 - Fix a user-triggerable segfault in expand_filename(). (There isn't
1483 a way to trigger this remotely.)
1484 - When sending a status event to the controller telling it that an
1485 OR address is reachable, set the port correctly. (Previously we
1486 were reporting the dir port.)
1487 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
1488 command. Bugfix on 0.1.2.17.
1489 - When loading bandwidth history, do not believe any information in
1490 the future. Fixes bug 434.
1491 - When loading entry guard information, do not believe any information
1493 - When we have our clock set far in the future and generate an
1494 onion key, then re-set our clock to be correct, we should not stop
1495 the onion key from getting rotated.
1496 - On some platforms, accept() can return a broken address. Detect
1497 this more quietly, and deal accordingly. Fixes bug 483.
1498 - It's not actually an error to find a non-pending entry in the DNS
1499 cache when canceling a pending resolve. Don't log unless stuff
1500 is fishy. Resolves bug 463.
1501 - Don't reset trusted dir server list when we set a configuration
1502 option. Patch from Robert Hogan.
1503 - Don't try to create the datadir when running --verify-config or
1504 --hash-password. Resolves bug 540.
1507 Changes in version 0.2.0.9-alpha - 2007-10-24
1508 This ninth development snapshot switches clients to the new v3 directory
1509 system; allows servers to be listed in the network status even when they
1510 have the same nickname as a registered server; and fixes many other
1511 bugs including a big one that was causing some servers to disappear
1512 from the network status lists for a few hours each day.
1514 o Major features (directory system):
1515 - Clients now download v3 consensus networkstatus documents instead
1516 of v2 networkstatus documents. Clients and caches now base their
1517 opinions about routers on these consensus documents. Clients only
1518 download router descriptors listed in the consensus.
1519 - Authorities now list servers who have the same nickname as
1520 a different named server, but list them with a new flag,
1521 "Unnamed". Now we can list servers that happen to pick the same
1522 nickname as a server that registered two years ago and then
1523 disappeared. Partially implements proposal 122.
1524 - If the consensus lists a router as "Unnamed", the name is assigned
1525 to a different router: do not identify the router by that name.
1526 Partially implements proposal 122.
1527 - Authorities can now come to a consensus on which method to use to
1528 compute the consensus. This gives us forward compatibility.
1531 - Stop publishing a new server descriptor just because we HUP or
1532 when we find our DirPort to be reachable but won't actually publish
1533 it. New descriptors without any real changes are dropped by the
1534 authorities, and can screw up our "publish every 18 hours" schedule.
1536 - When a router wasn't listed in a new networkstatus, we were leaving
1537 the flags for that router alone -- meaning it remained Named,
1538 Running, etc -- even though absence from the networkstatus means
1539 that it shouldn't be considered to exist at all anymore. Now we
1540 clear all the flags for routers that fall out of the networkstatus
1541 consensus. Fixes bug 529; bugfix on 0.1.2.x.
1542 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
1543 extrainfo documents and then discard them immediately for not
1544 matching the latest router. Bugfix on 0.2.0.1-alpha.
1546 o Minor features (v3 directory protocol):
1547 - Allow tor-gencert to generate a new certificate without replacing
1549 - Allow certificates to include an address.
1550 - When we change our directory-cache settings, reschedule all voting
1551 and download operations.
1552 - Reattempt certificate downloads immediately on failure, as long as
1553 we haven't failed a threshold number of times yet.
1554 - Delay retrying consensus downloads while we're downloading
1555 certificates to verify the one we just got. Also, count getting a
1556 consensus that we already have (or one that isn't valid) as a failure,
1557 and count failing to get the certificates after 20 minutes as a
1559 - Build circuits and download descriptors even if our consensus is a
1560 little expired. (This feature will go away once authorities are
1563 o Minor features (router descriptor cache):
1564 - If we find a cached-routers file that's been sitting around for more
1565 than 28 days unmodified, then most likely it's a leftover from
1566 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
1568 - When we (as a cache) download a descriptor because it was listed
1569 in a consensus, remember when the consensus was supposed to expire,
1570 and don't expire the descriptor until then.
1572 o Minor features (performance):
1573 - Call routerlist_remove_old_routers() much less often. This should
1574 speed startup, especially on directory caches.
1575 - Don't try to launch new descriptor downloads quite so often when we
1576 already have enough directory information to build circuits.
1577 - Base64 decoding was actually showing up on our profile when parsing
1578 the initial descriptor file; switch to an in-process all-at-once
1579 implementation that's about 3.5x times faster than calling out to
1582 o Minor features (compilation):
1583 - Detect non-ASCII platforms (if any still exist) and refuse to
1584 build there: some of our code assumes that 'A' is 65 and so on.
1586 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
1587 - Make the "next period" votes into "current period" votes immediately
1588 after publishing the consensus; avoid a heisenbug that made them
1589 stick around indefinitely.
1590 - When we discard a vote as a duplicate, do not report this as
1592 - Treat missing v3 keys or certificates as an error when running as a
1593 v3 directory authority.
1594 - When we're configured to be a v3 authority, but we're only listed
1595 as a non-v3 authority in our DirServer line for ourself, correct
1597 - If an authority doesn't have a qualified hostname, just put
1598 its address in the vote. This fixes the problem where we referred to
1599 "moria on moria:9031."
1600 - Distinguish between detached signatures for the wrong period, and
1601 detached signatures for a divergent vote.
1602 - Fix a small memory leak when computing a consensus.
1603 - When there's no concensus, we were forming a vote every 30
1604 minutes, but writing the "valid-after" line in our vote based
1605 on our configured V3AuthVotingInterval: so unless the intervals
1606 matched up, we immediately rejected our own vote because it didn't
1607 start at the voting interval that caused us to construct a vote.
1609 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
1610 - Delete unverified-consensus when the real consensus is set.
1611 - Consider retrying a consensus networkstatus fetch immediately
1612 after one fails: don't wait 60 seconds to notice.
1613 - When fetching a consensus as a cache, wait until a newer consensus
1614 should exist before trying to replace the current one.
1615 - Use a more forgiving schedule for retrying failed consensus
1616 downloads than for other types.
1618 o Minor bugfixes (other directory issues):
1619 - Correct the implementation of "download votes by digest." Bugfix on
1621 - Authorities no longer send back "400 you're unreachable please fix
1622 it" errors to Tor servers that aren't online all the time. We're
1623 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
1625 o Minor bugfixes (controller):
1626 - Don't reset trusted dir server list when we set a configuration
1627 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
1628 - Respond to INT and TERM SIGNAL commands before we execute the
1629 signal, in case the signal shuts us down. We had a patch in
1630 0.1.2.1-alpha that tried to do this by queueing the response on
1631 the connection's buffer before shutting down, but that really
1632 isn't the same thing at all. Bug located by Matt Edman.
1634 o Minor bugfixes (misc):
1635 - Correctly check for bad options to the "PublishServerDescriptor"
1636 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
1637 - Stop leaking memory on failing case of base32_decode, and make
1638 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
1639 - Don't try to download extrainfo documents when we're trying to
1640 fetch enough directory info to build a circuit: having enough
1641 info should get priority. Bugfix on 0.2.0.x.
1642 - Don't complain that "your server has not managed to confirm that its
1643 ports are reachable" if we haven't been able to build any circuits
1644 yet. Bug found by spending four hours without a v3 consensus. Bugfix
1646 - Detect the reason for failing to mmap a descriptor file we just
1647 wrote, and give a more useful log message. Fixes bug 533. Bugfix
1650 o Code simplifications and refactoring:
1651 - Remove support for the old bw_accounting file: we've been storing
1652 bandwidth accounting information in the state file since
1653 0.1.2.5-alpha. This may result in bandwidth accounting errors
1654 if you try to upgrade from 0.1.1.x or earlier, or if you try to
1655 downgrade to 0.1.1.x or earlier.
1656 - New convenience code to locate a file within the DataDirectory.
1657 - Move non-authority functionality out of dirvote.c.
1658 - Refactor the arguments for router_pick_{directory_|trusteddir}server
1659 so that they all take the same named flags.
1662 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
1663 Unix users an easy way to script their Tor process (e.g. by
1664 adjusting bandwidth based on the time of the day).
1667 Changes in version 0.2.0.8-alpha - 2007-10-12
1668 This eighth development snapshot fixes a crash bug that's been bothering
1669 us since February 2007, lets bridge authorities store a list of bridge
1670 descriptors they've seen, gets v3 directory voting closer to working,
1671 starts caching v3 directory consensus documents on directory mirrors,
1672 and fixes a variety of smaller issues including some minor memory leaks.
1674 o Major features (router descriptor cache):
1675 - Store routers in a file called cached-descriptors instead of in
1676 cached-routers. Initialize cached-descriptors from cached-routers
1677 if the old format is around. The new format allows us to store
1678 annotations along with descriptors.
1679 - Use annotations to record the time we received each descriptor, its
1680 source, and its purpose.
1681 - Disable the SETROUTERPURPOSE controller command: it is now
1683 - Controllers should now specify cache=no or cache=yes when using
1684 the +POSTDESCRIPTOR command.
1685 - Bridge authorities now write bridge descriptors to disk, meaning
1686 we can export them to other programs and begin distributing them
1689 o Major features (directory authorities):
1690 - When a v3 authority is missing votes or signatures, it now tries
1692 - Directory authorities track weighted fractional uptime as well as
1693 weighted mean-time-between failures. WFU is suitable for deciding
1694 whether a node is "usually up", while MTBF is suitable for deciding
1695 whether a node is "likely to stay up." We need both, because
1696 "usually up" is a good requirement for guards, while "likely to
1697 stay up" is a good requirement for long-lived connections.
1699 o Major features (v3 directory system):
1700 - Caches now download v3 network status documents as needed,
1701 and download the descriptors listed in them.
1702 - All hosts now attempt to download and keep fresh v3 authority
1703 certificates, and re-attempt after failures.
1704 - More internal-consistency checks for vote parsing.
1706 o Major bugfixes (crashes):
1707 - If a connection is shut down abruptly because of something that
1708 happened inside connection_flushed_some(), do not call
1709 connection_finished_flushing(). Should fix bug 451. Bugfix on
1712 o Major bugfixes (performance):
1713 - Fix really bad O(n^2) performance when parsing a long list of
1714 routers: Instead of searching the entire list for an "extra-info "
1715 string which usually wasn't there, once for every routerinfo
1716 we read, just scan lines forward until we find one we like.
1718 - When we add data to a write buffer in response to the data on that
1719 write buffer getting low because of a flush, do not consider the
1720 newly added data as a candidate for immediate flushing, but rather
1721 make it wait until the next round of writing. Otherwise, we flush
1722 and refill recursively, and a single greedy TLS connection can
1723 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
1725 o Minor features (v3 authority system):
1726 - Add more ways for tools to download the votes that lead to the
1728 - Send a 503 when low on bandwidth and a vote, consensus, or
1729 certificate is requested.
1730 - If-modified-since is now implemented properly for all kinds of
1731 certificate requests.
1733 o Minor bugfixes (network statuses):
1734 - Tweak the implementation of proposal 109 slightly: allow at most
1735 two Tor servers on the same IP address, except if it's the location
1736 of a directory authority, in which case allow five. Bugfix on
1739 o Minor bugfixes (controller):
1740 - When sending a status event to the controller telling it that an
1741 OR address is reachable, set the port correctly. (Previously we
1742 were reporting the dir port.) Bugfix on 0.1.2.x.
1744 o Minor bugfixes (v3 directory system):
1745 - Fix logic to look up a cert by its signing key digest. Bugfix on
1747 - Only change the reply to a vote to "OK" if it's not already
1748 set. This gets rid of annoying "400 OK" log messages, which may
1749 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
1750 - When we get a valid consensus, recompute the voting schedule.
1751 - Base the valid-after time of a vote on the consensus voting
1752 schedule, not on our preferred schedule.
1753 - Make the return values and messages from signature uploads and
1754 downloads more sensible.
1755 - Fix a memory leak when serving votes and consensus documents, and
1756 another when serving certificates.
1758 o Minor bugfixes (performance):
1759 - Use a slightly simpler string hashing algorithm (copying Python's
1760 instead of Java's) and optimize our digest hashing algorithm to take
1761 advantage of 64-bit platforms and to remove some possibly-costly
1763 - Fix a minor memory leak whenever we parse guards from our state
1764 file. Bugfix on 0.2.0.7-alpha.
1765 - Fix a minor memory leak whenever we write out a file. Bugfix on
1767 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
1768 command. Bugfix on 0.2.0.5-alpha.
1770 o Minor bugfixes (portability):
1771 - On some platforms, accept() can return a broken address. Detect
1772 this more quietly, and deal accordingly. Fixes bug 483.
1773 - Stop calling tor_strlower() on uninitialized memory in some cases.
1774 Bugfix in 0.2.0.7-alpha.
1776 o Minor bugfixes (usability):
1777 - Treat some 403 responses from directory servers as INFO rather than
1778 WARN-severity events.
1779 - It's not actually an error to find a non-pending entry in the DNS
1780 cache when canceling a pending resolve. Don't log unless stuff is
1781 fishy. Resolves bug 463.
1783 o Minor bugfixes (anonymity):
1784 - Never report that we've used more bandwidth than we're willing to
1785 relay: it leaks how much non-relay traffic we're using. Resolves
1787 - When looking for a circuit to cannibalize, consider family as well
1788 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
1789 circuit cannibalization).
1791 o Code simplifications and refactoring:
1792 - Make a bunch of functions static. Remove some dead code.
1793 - Pull out about a third of the really big routerlist.c; put it in a
1794 new module, networkstatus.c.
1795 - Merge the extra fields in local_routerstatus_t back into
1796 routerstatus_t: we used to need one routerstatus_t for each
1797 authority's opinion, plus a local_routerstatus_t for the locally
1798 computed consensus opinion. To save space, we put the locally
1799 modified fields into local_routerstatus_t, and only the common
1800 stuff into routerstatus_t. But once v3 directories are in use,
1801 clients and caches will no longer need to hold authority opinions;
1802 thus, the rationale for keeping the types separate is now gone.
1803 - Make the code used to reschedule and reattempt downloads more
1805 - Turn all 'Are we a directory server/mirror?' logic into a call to
1807 - Remove the code to generate the oldest (v1) directory format.
1808 The code has been disabled since 0.2.0.5-alpha.
1811 Changes in version 0.2.0.7-alpha - 2007-09-21
1812 This seventh development snapshot makes bridges work again, makes bridge
1813 authorities work for the first time, fixes two huge performance flaws
1814 in hidden services, and fixes a variety of minor issues.
1816 o New directory authorities:
1817 - Set up moria1 and tor26 as the first v3 directory authorities. See
1818 doc/spec/dir-spec.txt for details on the new directory design.
1820 o Major bugfixes (crashes):
1821 - Fix possible segfaults in functions called from
1822 rend_process_relay_cell(). Bugfix on 0.1.2.x.
1824 o Major bugfixes (bridges):
1825 - Fix a bug that made servers send a "404 Not found" in response to
1826 attempts to fetch their server descriptor. This caused Tor servers
1827 to take many minutes to establish reachability for their DirPort,
1828 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
1829 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
1830 users configure that and specify a bridge with an identity
1831 fingerprint, now they will lookup the bridge descriptor at the
1832 default bridge authority via a one-hop tunnel, but once circuits
1833 are established they will switch to a three-hop tunnel for later
1834 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
1836 o Major bugfixes (hidden services):
1837 - Hidden services were choosing introduction points uniquely by
1838 hexdigest, but when constructing the hidden service descriptor
1839 they merely wrote the (potentially ambiguous) nickname.
1840 - Clients now use the v2 intro format for hidden service
1841 connections: they specify their chosen rendezvous point by identity
1842 digest rather than by (potentially ambiguous) nickname. Both
1843 are bugfixes on 0.1.2.x, and they could speed up hidden service
1844 connections dramatically. Thanks to Karsten Loesing.
1846 o Minor features (security):
1847 - As a client, do not believe any server that tells us that an
1848 address maps to an internal address space.
1849 - Make it possible to enable HashedControlPassword and
1850 CookieAuthentication at the same time.
1852 o Minor features (guard nodes):
1853 - Tag every guard node in our state file with the version that
1854 we believe added it, or with our own version if we add it. This way,
1855 if a user temporarily runs an old version of Tor and then switches
1856 back to a new one, she doesn't automatically lose her guards.
1858 o Minor features (speed):
1859 - When implementing AES counter mode, update only the portions of the
1860 counter buffer that need to change, and don't keep separate
1861 network-order and host-order counters when they are the same (i.e.,
1862 on big-endian hosts.)
1864 o Minor features (controller):
1865 - Accept LF instead of CRLF on controller, since some software has a
1866 hard time generating real Internet newlines.
1867 - Add GETINFO values for the server status events
1868 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
1872 - Routers no longer include bandwidth-history lines in their
1873 descriptors; this information is already available in extra-info
1874 documents, and including it in router descriptors took up 60%
1875 (!) of compressed router descriptor downloads. Completes
1876 implementation of proposal 104.
1877 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
1878 and TorControl.py, as they use the old v0 controller protocol,
1879 and are obsoleted by TorFlow anyway.
1880 - Drop support for v1 rendezvous descriptors, since we never used
1881 them anyway, and the code has probably rotted by now. Based on
1882 patch from Karsten Loesing.
1883 - On OSX, stop warning the user that kqueue support in libevent is
1884 "experimental", since it seems to have worked fine for ages.
1887 - When generating information telling us how to extend to a given
1888 router, do not try to include the nickname if it is absent. Fixes
1889 bug 467. Bugfix on 0.2.0.3-alpha.
1890 - Fix a user-triggerable (but not remotely-triggerable) segfault
1891 in expand_filename(). Bugfix on 0.1.2.x.
1892 - Fix a memory leak when freeing incomplete requests from DNSPort.
1893 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
1894 - Don't try to access (or alter) the state file when running
1895 --list-fingerprint or --verify-config or --hash-password. (Resolves
1896 bug 499.) Bugfix on 0.1.2.x.
1897 - Servers used to decline to publish their DirPort if their
1898 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
1899 were below a threshold. Now they only look at BandwidthRate and
1900 RelayBandwidthRate. Bugfix on 0.1.2.x.
1901 - Remove an optimization in the AES counter-mode code that assumed
1902 that the counter never exceeded 2^68. When the counter can be set
1903 arbitrarily as an IV (as it is by Karsten's new hidden services
1904 code), this assumption no longer holds. Bugfix on 0.1.2.x.
1905 - Resume listing "AUTHORITY" flag for authorities in network status.
1906 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
1908 o Code simplifications and refactoring:
1909 - Revamp file-writing logic so we don't need to have the entire
1910 contents of a file in memory at once before we write to disk. Tor,
1912 - Turn "descriptor store" into a full-fledged type.
1913 - Move all NT services code into a separate source file.
1914 - Unify all code that computes medians, percentile elements, etc.
1915 - Get rid of a needless malloc when parsing address policies.
1918 Changes in version 0.1.2.17 - 2007-08-30
1919 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
1920 X bundles. Vidalia 0.0.14 makes authentication required for the
1921 ControlPort in the default configuration, which addresses important
1922 security risks. Everybody who uses Vidalia (or another controller)
1925 In addition, this Tor update fixes major load balancing problems with
1926 path selection, which should speed things up a lot once many people
1929 o Major bugfixes (security):
1930 - We removed support for the old (v0) control protocol. It has been
1931 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
1932 become more of a headache than it's worth.
1934 o Major bugfixes (load balancing):
1935 - When choosing nodes for non-guard positions, weight guards
1936 proportionally less, since they already have enough load. Patch
1938 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
1939 will allow fast Tor servers to get more attention.
1940 - When we're upgrading from an old Tor version, forget our current
1941 guards and pick new ones according to the new weightings. These
1942 three load balancing patches could raise effective network capacity
1943 by a factor of four. Thanks to Mike Perry for measurements.
1945 o Major bugfixes (stream expiration):
1946 - Expire not-yet-successful application streams in all cases if
1947 they've been around longer than SocksTimeout. Right now there are
1948 some cases where the stream will live forever, demanding a new
1949 circuit every 15 seconds. Fixes bug 454; reported by lodger.
1951 o Minor features (controller):
1952 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
1953 is valid before any authentication has been received. It tells
1954 a controller what kind of authentication is expected, and what
1955 protocol is spoken. Implements proposal 119.
1957 o Minor bugfixes (performance):
1958 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
1959 greatly speeding up loading cached-routers from disk on startup.
1960 - Disable sentinel-based debugging for buffer code: we squashed all
1961 the bugs that this was supposed to detect a long time ago, and now
1962 its only effect is to change our buffer sizes from nice powers of
1963 two (which platform mallocs tend to like) to values slightly over
1964 powers of two (which make some platform mallocs sad).
1966 o Minor bugfixes (misc):
1967 - If exit bandwidth ever exceeds one third of total bandwidth, then
1968 use the correct formula to weight exit nodes when choosing paths.
1969 Based on patch from Mike Perry.
1970 - Choose perfectly fairly among routers when choosing by bandwidth and
1971 weighting by fraction of bandwidth provided by exits. Previously, we
1972 would choose with only approximate fairness, and correct ourselves
1973 if we ran off the end of the list.
1974 - If we require CookieAuthentication but we fail to write the
1975 cookie file, we would warn but not exit, and end up in a state
1976 where no controller could authenticate. Now we exit.
1977 - If we require CookieAuthentication, stop generating a new cookie
1978 every time we change any piece of our config.
1979 - Refuse to start with certain directory authority keys, and
1980 encourage people using them to stop.
1981 - Terminate multi-line control events properly. Original patch
1983 - Fix a minor memory leak when we fail to find enough suitable
1984 servers to choose a circuit.
1985 - Stop leaking part of the descriptor when we run into a particularly
1986 unparseable piece of it.
1989 Changes in version 0.2.0.6-alpha - 2007-08-26
1990 This sixth development snapshot features a new Vidalia version in the
1991 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
1992 the ControlPort in the default configuration, which addresses important
1995 In addition, this snapshot fixes major load balancing problems
1996 with path selection, which should speed things up a lot once many
1997 people have upgraded. The directory authorities also use a new
1998 mean-time-between-failure approach to tracking which servers are stable,
1999 rather than just looking at the most recent uptime.
2001 o New directory authorities:
2002 - Set up Tonga as the default bridge directory authority.
2005 - Directory authorities now track servers by weighted
2006 mean-times-between-failures. When we have 4 or more days of data,
2007 use measured MTBF rather than declared uptime to decide whether
2008 to call a router Stable. Implements proposal 108.
2010 o Major bugfixes (load balancing):
2011 - When choosing nodes for non-guard positions, weight guards
2012 proportionally less, since they already have enough load. Patch
2014 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
2015 will allow fast Tor servers to get more attention.
2016 - When we're upgrading from an old Tor version, forget our current
2017 guards and pick new ones according to the new weightings. These
2018 three load balancing patches could raise effective network capacity
2019 by a factor of four. Thanks to Mike Perry for measurements.
2021 o Major bugfixes (descriptor parsing):
2022 - Handle unexpected whitespace better in malformed descriptors. Bug
2023 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
2026 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
2027 GETINFO for Torstat to use until it can switch to using extrainfos.
2028 - Optionally (if built with -DEXPORTMALLINFO) export the output
2029 of mallinfo via http, as tor/mallinfo.txt. Only accessible
2033 - Do not intermix bridge routers with controller-added
2034 routers. (Bugfix on 0.2.0.x)
2035 - Do not fail with an assert when accept() returns an unexpected
2036 address family. Addresses but does not wholly fix bug 483. (Bugfix
2038 - Let directory authorities startup even when they can't generate
2039 a descriptor immediately, e.g. because they don't know their
2041 - Stop putting the authentication cookie in a file called "0"
2042 in your working directory if you don't specify anything for the
2043 new CookieAuthFile option. Reported by Matt Edman.
2044 - Make it possible to read the PROTOCOLINFO response in a way that
2045 conforms to our control-spec. Reported by Matt Edman.
2046 - Fix a minor memory leak when we fail to find enough suitable
2047 servers to choose a circuit. Bugfix on 0.1.2.x.
2048 - Stop leaking part of the descriptor when we run into a particularly
2049 unparseable piece of it. Bugfix on 0.1.2.x.
2050 - Unmap the extrainfo cache file on exit.
2053 Changes in version 0.2.0.5-alpha - 2007-08-19
2054 This fifth development snapshot fixes compilation on Windows again;
2055 fixes an obnoxious client-side bug that slowed things down and put
2056 extra load on the network; gets us closer to using the v3 directory
2057 voting scheme; makes it easier for Tor controllers to use cookie-based
2058 authentication; and fixes a variety of other bugs.
2061 - Version 1 directories are no longer generated in full. Instead,
2062 authorities generate and serve "stub" v1 directories that list
2063 no servers. This will stop Tor versions 0.1.0.x and earlier from
2064 working, but (for security reasons) nobody should be running those
2067 o Major bugfixes (compilation, 0.2.0.x):
2068 - Try to fix Win32 compilation again: improve checking for IPv6 types.
2069 - Try to fix MSVC compilation: build correctly on platforms that do
2070 not define s6_addr16 or s6_addr32.
2071 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
2074 o Major bugfixes (stream expiration):
2075 - Expire not-yet-successful application streams in all cases if
2076 they've been around longer than SocksTimeout. Right now there are
2077 some cases where the stream will live forever, demanding a new
2078 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
2081 o Minor features (directory servers):
2082 - When somebody requests a list of statuses or servers, and we have
2083 none of those, return a 404 rather than an empty 200.
2085 o Minor features (directory voting):
2086 - Store v3 consensus status consensuses on disk, and reload them
2089 o Minor features (security):
2090 - Warn about unsafe ControlPort configurations.
2091 - Refuse to start with certain directory authority keys, and
2092 encourage people using them to stop.
2094 o Minor features (controller):
2095 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
2096 is valid before any authentication has been received. It tells
2097 a controller what kind of authentication is expected, and what
2098 protocol is spoken. Implements proposal 119.
2099 - New config option CookieAuthFile to choose a new location for the
2100 cookie authentication file, and config option
2101 CookieAuthFileGroupReadable to make it group-readable.
2103 o Minor features (unit testing):
2104 - Add command-line arguments to unit-test executable so that we can
2105 invoke any chosen test from the command line rather than having
2106 to run the whole test suite at once; and so that we can turn on
2107 logging for the unit tests.
2109 o Minor bugfixes (on 0.1.2.x):
2110 - If we require CookieAuthentication but we fail to write the
2111 cookie file, we would warn but not exit, and end up in a state
2112 where no controller could authenticate. Now we exit.
2113 - If we require CookieAuthentication, stop generating a new cookie
2114 every time we change any piece of our config.
2115 - When loading bandwidth history, do not believe any information in
2116 the future. Fixes bug 434.
2117 - When loading entry guard information, do not believe any information
2119 - When we have our clock set far in the future and generate an
2120 onion key, then re-set our clock to be correct, we should not stop
2121 the onion key from getting rotated.
2122 - Clean up torrc sample config file.
2123 - Do not automatically run configure from autogen.sh. This
2124 non-standard behavior tended to annoy people who have built other
2127 o Minor bugfixes (on 0.2.0.x):
2128 - Fix a bug with AutomapHostsOnResolve that would always cause
2129 the second request to fail. Bug reported by Kate. Bugfix on
2131 - Fix a bug in ADDRMAP controller replies that would sometimes
2132 try to print a NULL. Patch from tup.
2133 - Read v3 directory authority keys from the right location.
2134 - Numerous bugfixes to directory voting code.
2137 Changes in version 0.1.2.16 - 2007-08-01
2138 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
2139 remote attacker in certain situations to rewrite the user's torrc
2140 configuration file. This can completely compromise anonymity of users
2141 in most configurations, including those running the Vidalia bundles,
2142 TorK, etc. Or worse.
2144 o Major security fixes:
2145 - Close immediately after missing authentication on control port;
2146 do not allow multiple authentication attempts.
2149 Changes in version 0.2.0.4-alpha - 2007-08-01
2150 This fourth development snapshot fixes a critical security vulnerability
2151 for most users, specifically those running Vidalia, TorK, etc. Everybody
2152 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
2154 o Major security fixes:
2155 - Close immediately after missing authentication on control port;
2156 do not allow multiple authentication attempts.
2158 o Major bugfixes (compilation):
2159 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
2162 o Minor features (performance):
2163 - Be even more aggressive about releasing RAM from small
2164 empty buffers. Thanks to our free-list code, this shouldn't be too
2165 performance-intensive.
2166 - Disable sentinel-based debugging for buffer code: we squashed all
2167 the bugs that this was supposed to detect a long time ago, and
2168 now its only effect is to change our buffer sizes from nice
2169 powers of two (which platform mallocs tend to like) to values
2170 slightly over powers of two (which make some platform mallocs sad).
2171 - Log malloc statistics from mallinfo() on platforms where it
2175 Changes in version 0.2.0.3-alpha - 2007-07-29
2176 This third development snapshot introduces new experimental
2177 blocking-resistance features and a preliminary version of the v3
2178 directory voting design, and includes many other smaller features
2182 - The first pieces of our "bridge" design for blocking-resistance
2183 are implemented. People can run bridge directory authorities;
2184 people can run bridges; and people can configure their Tor clients
2185 with a set of bridges to use as the first hop into the Tor network.
2186 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
2188 - Create listener connections before we setuid to the configured
2189 User and Group. Now non-Windows users can choose port values
2190 under 1024, start Tor as root, and have Tor bind those ports
2191 before it changes to another UID. (Windows users could already
2193 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
2194 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
2195 on "vserver" accounts. (Patch from coderman.)
2196 - Be even more aggressive about separating local traffic from relayed
2197 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
2199 o Major features (experimental):
2200 - First cut of code for "v3 dir voting": directory authorities will
2201 vote on a common network status document rather than each publishing
2202 their own opinion. This code needs more testing and more corner-case
2203 handling before it's ready for use.
2206 - Directory authorities now call routers Fast if their bandwidth is
2207 at least 100KB/s, and consider their bandwidth adequate to be a
2208 Guard if it is at least 250KB/s, no matter the medians. This fix
2209 complements proposal 107. [Bugfix on 0.1.2.x]
2210 - Directory authorities now never mark more than 3 servers per IP as
2211 Valid and Running. (Implements proposal 109, by Kevin Bauer and
2213 - Minor change to organizationName and commonName generation
2214 procedures in TLS certificates during Tor handshakes, to invalidate
2215 some earlier censorware approaches. This is not a long-term
2216 solution, but applying it will give us a bit of time to look into
2217 the epidemiology of countermeasures as they spread.
2219 o Major bugfixes (directory):
2220 - Rewrite directory tokenization code to never run off the end of
2221 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
2223 o Minor features (controller):
2224 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
2225 match requests to applications. (Patch from Robert Hogan.)
2226 - Report address and port correctly on connections to DNSPort. (Patch
2228 - Add a RESOLVE command to launch hostname lookups. (Original patch
2230 - Add GETINFO status/enough-dir-info to let controllers tell whether
2231 Tor has downloaded sufficient directory information. (Patch
2233 - You can now use the ControlSocket option to tell Tor to listen for
2234 controller connections on Unix domain sockets on systems that
2235 support them. (Patch from Peter Palfrader.)
2236 - STREAM NEW events are generated for DNSPort requests and for
2237 tunneled directory connections. (Patch from Robert Hogan.)
2238 - New "GETINFO address-mappings/*" command to get address mappings
2239 with expiry information. "addr-mappings/*" is now deprecated.
2242 o Minor features (misc):
2243 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
2245 - The tor-gencert tool for v3 directory authorities now creates all
2246 files as readable to the file creator only, and write-protects
2247 the authority identity key.
2248 - When dumping memory usage, list bytes used in buffer memory
2250 - When running with dmalloc, dump more stats on hup and on exit.
2251 - Directory authorities now fail quickly and (relatively) harmlessly
2252 if they generate a network status document that is somehow
2255 o Traffic load balancing improvements:
2256 - If exit bandwidth ever exceeds one third of total bandwidth, then
2257 use the correct formula to weight exit nodes when choosing paths.
2258 (Based on patch from Mike Perry.)
2259 - Choose perfectly fairly among routers when choosing by bandwidth and
2260 weighting by fraction of bandwidth provided by exits. Previously, we
2261 would choose with only approximate fairness, and correct ourselves
2262 if we ran off the end of the list. [Bugfix on 0.1.2.x]
2264 o Performance improvements:
2265 - Be more aggressive with freeing buffer RAM or putting it on the
2267 - Use Critical Sections rather than Mutexes for synchronizing threads
2268 on win32; Mutexes are heavier-weight, and designed for synchronizing
2271 o Deprecated and removed features:
2272 - RedirectExits is now deprecated.
2273 - Stop allowing address masks that do not correspond to bit prefixes.
2274 We have warned about these for a really long time; now it's time
2275 to reject them. (Patch from croup.)
2277 o Minor bugfixes (directory):
2278 - Fix another crash bug related to extra-info caching. (Bug found by
2279 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
2280 - Directories no longer return a "304 not modified" when they don't
2281 have the networkstatus the client asked for. Also fix a memory
2282 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
2283 - We had accidentally labelled 0.1.2.x directory servers as not
2284 suitable for begin_dir requests, and had labelled no directory
2285 servers as suitable for uploading extra-info documents. [Bugfix
2288 o Minor bugfixes (dns):
2289 - Fix a crash when DNSPort is set more than once. (Patch from Robert
2290 Hogan.) [Bugfix on 0.2.0.2-alpha]
2291 - Add DNSPort connections to the global connection list, so that we
2292 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
2294 - Fix a dangling reference that could lead to a crash when DNSPort is
2295 changed or closed (Patch from Robert Hogan.) [Bugfix on
2298 o Minor bugfixes (controller):
2299 - Provide DNS expiry times in GMT, not in local time. For backward
2300 compatibility, ADDRMAP events only provide GMT expiry in an extended
2301 field. "GETINFO address-mappings" always does the right thing.
2302 - Use CRLF line endings properly in NS events.
2303 - Terminate multi-line control events properly. (Original patch
2304 from tup.) [Bugfix on 0.1.2.x-alpha]
2305 - Do not include spaces in SOURCE_ADDR fields in STREAM
2306 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
2309 Changes in version 0.1.2.15 - 2007-07-17
2310 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
2311 problems, fixes compilation on BSD, and fixes a variety of other
2312 bugs. Everybody should upgrade.
2314 o Major bugfixes (compilation):
2315 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
2317 o Major bugfixes (crashes):
2318 - Try even harder not to dereference the first character after
2319 an mmap(). Reported by lodger.
2320 - Fix a crash bug in directory authorities when we re-number the
2321 routerlist while inserting a new router.
2322 - When the cached-routers file is an even multiple of the page size,
2323 don't run off the end and crash. (Fixes bug 455; based on idea
2325 - Fix eventdns.c behavior on Solaris: It is critical to include
2326 orconfig.h _before_ sys/types.h, so that we can get the expected
2327 definition of _FILE_OFFSET_BITS.
2329 o Major bugfixes (security):
2330 - Fix a possible buffer overrun when using BSD natd support. Bug
2332 - When sending destroy cells from a circuit's origin, don't include
2333 the reason for tearing down the circuit. The spec says we didn't,
2334 and now we actually don't. Reported by lodger.
2335 - Keep streamids from different exits on a circuit separate. This
2336 bug may have allowed other routers on a given circuit to inject
2337 cells into streams. Reported by lodger; fixes bug 446.
2338 - If there's a never-before-connected-to guard node in our list,
2339 never choose any guards past it. This way we don't expand our
2340 guard list unless we need to.
2342 o Minor bugfixes (guard nodes):
2343 - Weight guard selection by bandwidth, so that low-bandwidth nodes
2344 don't get overused as guards.
2346 o Minor bugfixes (directory):
2347 - Correctly count the number of authorities that recommend each
2348 version. Previously, we were under-counting by 1.
2349 - Fix a potential crash bug when we load many server descriptors at
2350 once and some of them make others of them obsolete. Fixes bug 458.
2352 o Minor bugfixes (hidden services):
2353 - Stop tearing down the whole circuit when the user asks for a
2354 connection to a port that the hidden service didn't configure.
2357 o Minor bugfixes (misc):
2358 - On Windows, we were preventing other processes from reading
2359 cached-routers while Tor was running. Reported by janbar.
2360 - Fix a possible (but very unlikely) bug in picking routers by
2361 bandwidth. Add a log message to confirm that it is in fact
2362 unlikely. Patch from lodger.
2363 - Backport a couple of memory leak fixes.
2364 - Backport miscellaneous cosmetic bugfixes.
2367 Changes in version 0.2.0.2-alpha - 2007-06-02
2368 o Major bugfixes on 0.2.0.1-alpha:
2369 - Fix an assertion failure related to servers without extra-info digests.
2370 Resolves bugs 441 and 442.
2372 o Minor features (directory):
2373 - Support "If-Modified-Since" when answering HTTP requests for
2374 directories, running-routers documents, and network-status documents.
2375 (There's no need to support it for router descriptors, since those
2376 are downloaded by descriptor digest.)
2378 o Minor build issues:
2379 - Clear up some MIPSPro compiler warnings.
2380 - When building from a tarball on a machine that happens to have SVK
2381 installed, report the micro-revision as whatever version existed
2382 in the tarball, not as "x".
2385 Changes in version 0.2.0.1-alpha - 2007-06-01
2386 This early development snapshot provides new features for people running
2387 Tor as both a client and a server (check out the new RelayBandwidth
2388 config options); lets Tor run as a DNS proxy; and generally moves us
2389 forward on a lot of fronts.
2391 o Major features, server usability:
2392 - New config options RelayBandwidthRate and RelayBandwidthBurst:
2393 a separate set of token buckets for relayed traffic. Right now
2394 relayed traffic is defined as answers to directory requests, and
2395 OR connections that don't have any local circuits on them.
2397 o Major features, client usability:
2398 - A client-side DNS proxy feature to replace the need for
2399 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
2400 for DNS requests on port 9999, use the Tor network to resolve them
2401 anonymously, and send the reply back like a regular DNS server.
2402 The code still only implements a subset of DNS.
2403 - Make PreferTunneledDirConns and TunnelDirConns work even when
2404 we have no cached directory info. This means Tor clients can now
2405 do all of their connections protected by TLS.
2407 o Major features, performance and efficiency:
2408 - Directory authorities accept and serve "extra info" documents for
2409 routers. These documents contain fields from router descriptors
2410 that aren't usually needed, and that use a lot of excess
2411 bandwidth. Once these fields are removed from router descriptors,
2412 the bandwidth savings should be about 60%. [Partially implements
2414 - Servers upload extra-info documents to any authority that accepts
2415 them. Authorities (and caches that have been configured to download
2416 extra-info documents) download them as needed. [Partially implements
2418 - Change the way that Tor buffers data that it is waiting to write.
2419 Instead of queueing data cells in an enormous ring buffer for each
2420 client->OR or OR->OR connection, we now queue cells on a separate
2421 queue for each circuit. This lets us use less slack memory, and
2422 will eventually let us be smarter about prioritizing different kinds
2424 - Use memory pools to allocate cells with better speed and memory
2425 efficiency, especially on platforms where malloc() is inefficient.
2426 - Stop reading on edge connections when their corresponding circuit
2427 buffers are full; start again as the circuits empty out.
2429 o Major features, other:
2430 - Add an HSAuthorityRecordStats option that hidden service authorities
2431 can use to track statistics of overall hidden service usage without
2432 logging information that would be very useful to an attacker.
2433 - Start work implementing multi-level keys for directory authorities:
2434 Add a standalone tool to generate key certificates. (Proposal 103.)
2437 - Directory authorities now call routers Stable if they have an
2438 uptime of at least 30 days, even if that's not the median uptime
2439 in the network. Implements proposal 107, suggested by Kevin Bauer
2442 o Minor fixes (resource management):
2443 - Count the number of open sockets separately from the number
2444 of active connection_t objects. This will let us avoid underusing
2445 our allocated connection limit.
2446 - We no longer use socket pairs to link an edge connection to an
2447 anonymous directory connection or a DirPort test connection.
2448 Instead, we track the link internally and transfer the data
2449 in-process. This saves two sockets per "linked" connection (at the
2450 client and at the server), and avoids the nasty Windows socketpair()
2452 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
2453 for every single inactive connection_t. Free items from the
2454 4k/16k-buffer free lists when they haven't been used for a while.
2456 o Minor features (build):
2457 - Make autoconf search for libevent, openssl, and zlib consistently.
2458 - Update deprecated macros in configure.in.
2459 - When warning about missing headers, tell the user to let us
2460 know if the compile succeeds anyway, so we can downgrade the
2462 - Include the current subversion revision as part of the version
2463 string: either fetch it directly if we're in an SVN checkout, do
2464 some magic to guess it if we're in an SVK checkout, or use
2465 the last-detected version if we're building from a .tar.gz.
2466 Use this version consistently in log messages.
2468 o Minor features (logging):
2469 - Always prepend "Bug: " to any log message about a bug.
2470 - Put a platform string (e.g. "Linux i686") in the startup log
2471 message, so when people paste just their logs, we know if it's
2472 OpenBSD or Windows or what.
2473 - When logging memory usage, break down memory used in buffers by
2476 o Minor features (directory system):
2477 - New config option V2AuthoritativeDirectory that all directory
2478 authorities should set. This will let future authorities choose
2479 not to serve V2 directory information.
2480 - Directory authorities allow multiple router descriptors and/or extra
2481 info documents to be uploaded in a single go. This will make
2482 implementing proposal 104 simpler.
2484 o Minor features (controller):
2485 - Add a new config option __DisablePredictedCircuits designed for
2486 use by the controller, when we don't want Tor to build any circuits
2488 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
2489 so we can exit from the middle of the circuit.
2490 - Implement "getinfo status/circuit-established".
2491 - Implement "getinfo status/version/..." so a controller can tell
2492 whether the current version is recommended, and whether any versions
2493 are good, and how many authorities agree. (Patch from shibz.)
2495 o Minor features (hidden services):
2496 - Allow multiple HiddenServicePort directives with the same virtual
2497 port; when they occur, the user is sent round-robin to one
2498 of the target ports chosen at random. Partially fixes bug 393 by
2499 adding limited ad-hoc round-robining.
2501 o Minor features (other):
2503 - Add a new AutomapHostsOnResolve option: when it is enabled, any
2504 resolve request for hosts matching a given pattern causes Tor to
2505 generate an internal virtual address mapping for that host. This
2506 allows DNSPort to work sensibly with hidden service users. By
2507 default, .exit and .onion addresses are remapped; the list of
2508 patterns can be reconfigured with AutomapHostsSuffixes.
2509 - Add an "-F" option to tor-resolve to force a resolve for a .onion
2510 address. Thanks to the AutomapHostsOnResolve option, this is no
2511 longer a completely silly thing to do.
2512 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
2513 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
2514 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
2515 minus 1 byte: the actual maximum declared bandwidth.
2518 - Removed support for the old binary "version 0" controller protocol.
2519 This has been deprecated since 0.1.1, and warnings have been issued
2520 since 0.1.2. When we encounter a v0 control message, we now send
2521 back an error and close the connection.
2522 - Remove the old "dns worker" server DNS code: it hasn't been default
2523 since 0.1.2.2-alpha, and all the servers seem to be using the new
2526 o Minor bugfixes (portability):
2527 - Even though Windows is equally happy with / and \ as path separators,
2528 try to use \ consistently on Windows and / consistently on Unix: it
2529 makes the log messages nicer.
2530 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
2531 - Read resolv.conf files correctly on platforms where read() returns
2532 partial results on small file reads.
2534 o Minor bugfixes (directory):
2535 - Correctly enforce that elements of directory objects do not appear
2536 more often than they are allowed to appear.
2537 - When we are reporting the DirServer line we just parsed, we were
2538 logging the second stanza of the key fingerprint, not the first.
2540 o Minor bugfixes (logging):
2541 - When we hit an EOF on a log (probably because we're shutting down),
2542 don't try to remove the log from the list: just mark it as
2543 unusable. (Bulletproofs against bug 222.)
2545 o Minor bugfixes (other):
2546 - In the exitlist script, only consider the most recently published
2547 server descriptor for each server. Also, when the user requests
2548 a list of servers that _reject_ connections to a given address,
2549 explicitly exclude the IPs that also have servers that accept
2550 connections to that address. (Resolves bug 405.)
2551 - Stop allowing hibernating servers to be "stable" or "fast".
2552 - On Windows, we were preventing other processes from reading
2553 cached-routers while Tor was running. (Reported by janbar)
2554 - Make the NodeFamilies config option work. (Reported by
2555 lodger -- it has never actually worked, even though we added it
2557 - Check return values from pthread_mutex functions.
2558 - Don't save non-general-purpose router descriptors to the disk cache,
2559 because we have no way of remembering what their purpose was when
2561 - Add even more asserts to hunt down bug 417.
2562 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
2563 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
2564 Add a log message to confirm that it is in fact unlikely.
2566 o Minor bugfixes (controller):
2567 - Make 'getinfo fingerprint' return a 551 error if we're not a
2568 server, so we match what the control spec claims we do. Reported
2570 - Fix a typo in an error message when extendcircuit fails that
2571 caused us to not follow the \r\n-based delimiter protocol. Reported
2574 o Code simplifications and refactoring:
2575 - Stop passing around circuit_t and crypt_path_t pointers that are
2576 implicit in other procedure arguments.
2577 - Drop the old code to choke directory connections when the
2578 corresponding OR connections got full: thanks to the cell queue
2579 feature, OR conns don't get full any more.
2580 - Make dns_resolve() handle attaching connections to circuits
2581 properly, so the caller doesn't have to.
2582 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
2583 - Keep the connection array as a dynamic smartlist_t, rather than as
2584 a fixed-sized array. This is important, as the number of connections
2585 is becoming increasingly decoupled from the number of sockets.
2588 Changes in version 0.1.2.14 - 2007-05-25
2589 Tor 0.1.2.14 changes the addresses of two directory authorities (this
2590 change especially affects those who serve or use hidden services),
2591 and fixes several other crash- and security-related bugs.
2593 o Directory authority changes:
2594 - Two directory authorities (moria1 and moria2) just moved to new
2595 IP addresses. This change will particularly affect those who serve
2596 or use hidden services.
2598 o Major bugfixes (crashes):
2599 - If a directory server runs out of space in the connection table
2600 as it's processing a begin_dir request, it will free the exit stream
2601 but leave it attached to the circuit, leading to unpredictable
2602 behavior. (Reported by seeess, fixes bug 425.)
2603 - Fix a bug in dirserv_remove_invalid() that would cause authorities
2604 to corrupt memory under some really unlikely scenarios.
2605 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
2606 - Avoid segfaults when reading from mmaped descriptor file. (Reported
2609 o Major bugfixes (security):
2610 - When choosing an entry guard for a circuit, avoid using guards
2611 that are in the same family as the chosen exit -- not just guards
2612 that are exactly the chosen exit. (Reported by lodger.)
2614 o Major bugfixes (resource management):
2615 - If a directory authority is down, skip it when deciding where to get
2616 networkstatus objects or descriptors. Otherwise we keep asking
2617 every 10 seconds forever. Fixes bug 384.
2618 - Count it as a failure if we fetch a valid network-status but we
2619 don't want to keep it. Otherwise we'll keep fetching it and keep
2620 not wanting to keep it. Fixes part of bug 422.
2621 - If all of our dirservers have given us bad or no networkstatuses
2622 lately, then stop hammering them once per minute even when we
2623 think they're failed. Fixes another part of bug 422.
2626 - Actually set the purpose correctly for descriptors inserted with
2628 - When we have k non-v2 authorities in our DirServer config,
2629 we ignored the last k authorities in the list when updating our
2631 - Correctly back-off from requesting router descriptors that we are
2632 having a hard time downloading.
2633 - Read resolv.conf files correctly on platforms where read() returns
2634 partial results on small file reads.
2635 - Don't rebuild the entire router store every time we get 32K of
2636 routers: rebuild it when the journal gets very large, or when
2637 the gaps in the store get very large.
2640 - When routers publish SVN revisions in their router descriptors,
2641 authorities now include those versions correctly in networkstatus
2643 - Warn when using a version of libevent before 1.3b to run a server on
2644 OSX or BSD: these versions interact badly with userspace threads.
2647 Changes in version 0.1.2.13 - 2007-04-24
2648 This release features some major anonymity fixes, such as safer path
2649 selection; better client performance; faster bootstrapping, better
2650 address detection, and better DNS support for servers; write limiting as
2651 well as read limiting to make servers easier to run; and a huge pile of
2652 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
2654 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
2655 of the Freenode IRC network, remembering his patience and vision for
2656 free speech on the Internet.
2659 - Fix a memory leak when we ask for "all" networkstatuses and we
2660 get one we don't recognize.
2661 - Add more asserts to hunt down bug 417.
2662 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
2665 Changes in version 0.1.2.12-rc - 2007-03-16
2667 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
2668 directory information requested inside Tor connections (i.e. via
2669 begin_dir cells). It only triggered when the same connection was
2670 serving other data at the same time. Reported by seeess.
2673 - When creating a circuit via the controller, send a 'launched'
2674 event when we're done, so we follow the spec better.
2677 Changes in version 0.1.2.11-rc - 2007-03-15
2678 o Minor bugfixes (controller), reported by daejees:
2679 - Correct the control spec to match how the code actually responds
2680 to 'getinfo addr-mappings/*'.
2681 - The control spec described a GUARDS event, but the code
2682 implemented a GUARD event. Standardize on GUARD, but let people
2686 Changes in version 0.1.2.10-rc - 2007-03-07
2687 o Major bugfixes (Windows):
2688 - Do not load the NT services library functions (which may not exist)
2689 just to detect if we're a service trying to shut down. Now we run
2690 on Win98 and friends again.
2692 o Minor bugfixes (other):
2693 - Clarify a couple of log messages.
2694 - Fix a misleading socks5 error number.
2697 Changes in version 0.1.2.9-rc - 2007-03-02
2698 o Major bugfixes (Windows):
2699 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
2700 of the usual GCC "%llu". This prevents a bug when saving 64-bit
2701 int configuration values: the high-order 32 bits would get
2702 truncated. In particular, we were being bitten by the default
2703 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
2704 and maybe also bug 397.)
2706 o Minor bugfixes (performance):
2707 - Use OpenSSL's AES implementation on platforms where it's faster.
2708 This could save us as much as 10% CPU usage.
2710 o Minor bugfixes (server):
2711 - Do not rotate onion key immediately after setting it for the first
2714 o Minor bugfixes (directory authorities):
2715 - Stop calling servers that have been hibernating for a long time
2716 "stable". Also, stop letting hibernating or obsolete servers affect
2717 uptime and bandwidth cutoffs.
2718 - Stop listing hibernating servers in the v1 directory.
2720 o Minor bugfixes (hidden services):
2721 - Upload hidden service descriptors slightly less often, to reduce
2722 load on authorities.
2724 o Minor bugfixes (other):
2725 - Fix an assert that could trigger if a controller quickly set then
2726 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
2727 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
2729 - Fix a potential race condition in the rpm installer. Found by
2731 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
2732 of 2 as indicating that the server is completely bad; it sometimes
2733 means that the server is just bad for the request in question. (may fix
2734 the last of bug 326.)
2735 - Disable encrypted directory connections when we don't have a server
2736 descriptor for the destination. We'll get this working again in
2740 Changes in version 0.1.2.8-beta - 2007-02-26
2741 o Major bugfixes (crashes):
2742 - Stop crashing when the controller asks us to resetconf more than
2743 one config option at once. (Vidalia 0.0.11 does this.)
2744 - Fix a crash that happened on Win98 when we're given command-line
2745 arguments: don't try to load NT service functions from advapi32.dll
2746 except when we need them. (Bug introduced in 0.1.2.7-alpha;
2748 - Fix a longstanding obscure crash bug that could occur when
2749 we run out of DNS worker processes. (Resolves bug 390.)
2751 o Major bugfixes (hidden services):
2752 - Correctly detect whether hidden service descriptor downloads are
2753 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
2755 o Major bugfixes (accounting):
2756 - When we start during an accounting interval before it's time to wake
2757 up, remember to wake up at the correct time. (May fix bug 342.)
2759 o Minor bugfixes (controller):
2760 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
2761 clear the corresponding on_circuit variable, and remember later
2762 that we don't need to send a redundant CLOSED event. (Resolves part
2764 - Report events where a resolve succeeded or where we got a socks
2765 protocol error correctly, rather than calling both of them
2767 - Change reported stream target addresses to IP consistently when
2768 we finally get the IP from an exit node.
2769 - Send log messages to the controller even if they happen to be very
2772 o Minor bugfixes (other):
2773 - Display correct results when reporting which versions are
2774 recommended, and how recommended they are. (Resolves bug 383.)
2775 - Improve our estimates for directory bandwidth to be less random:
2776 guess that an unrecognized directory will have the average bandwidth
2777 from all known directories, not that it will have the average
2778 bandwidth from those directories earlier than it on the list.
2779 - If we start a server with ClientOnly 1, then set ClientOnly to 0
2780 and hup, stop triggering an assert based on an empty onion_key.
2781 - On platforms with no working mmap() equivalent, don't warn the
2782 user when cached-routers doesn't exist.
2783 - Warn the user when mmap() [or its equivalent] fails for some reason
2784 other than file-not-found.
2785 - Don't warn the user when cached-routers.new doesn't exist: that's
2786 perfectly fine when starting up for the first time.
2787 - When EntryNodes are configured, rebuild the guard list to contain,
2788 in order: the EntryNodes that were guards before; the rest of the
2789 EntryNodes; the nodes that were guards before.
2790 - Mask out all signals in sub-threads; only the libevent signal
2791 handler should be processing them. This should prevent some crashes
2792 on some machines using pthreads. (Patch from coderman.)
2793 - Fix switched arguments on memset in the implementation of
2794 tor_munmap() for systems with no mmap() call.
2795 - When Tor receives a router descriptor that it asked for, but
2796 no longer wants (because it has received fresh networkstatuses
2797 in the meantime), do not warn the user. Cache the descriptor if
2798 we're a cache; drop it if we aren't.
2799 - Make earlier entry guards _really_ get retried when the network
2801 - On a malformed DNS reply, always give an error to the corresponding
2803 - Build with recent libevents on platforms that do not define the
2804 nonstandard types "u_int8_t" and friends.
2806 o Minor features (controller):
2807 - Warn the user when an application uses the obsolete binary v0
2808 control protocol. We're planning to remove support for it during
2809 the next development series, so it's good to give people some
2811 - Add STREAM_BW events to report per-entry-stream bandwidth
2812 use. (Patch from Robert Hogan.)
2813 - Rate-limit SIGNEWNYM signals in response to controllers that
2814 impolitely generate them for every single stream. (Patch from
2815 mwenge; closes bug 394.)
2816 - Make REMAP stream events have a SOURCE (cache or exit), and
2817 make them generated in every case where we get a successful
2818 connected or resolved cell.
2820 o Minor bugfixes (performance):
2821 - Call router_have_min_dir_info half as often. (This is showing up in
2822 some profiles, but not others.)
2823 - When using GCC, make log_debug never get called at all, and its
2824 arguments never get evaluated, when no debug logs are configured.
2825 (This is showing up in some profiles, but not others.)
2828 - Remove some never-implemented options. Mark PathlenCoinWeight as
2830 - Implement proposal 106: Stop requiring clients to have well-formed
2831 certificates; stop checking nicknames in certificates. (Clients
2832 have certificates so that they can look like Tor servers, but in
2833 the future we might want to allow them to look like regular TLS
2834 clients instead. Nicknames in certificates serve no purpose other
2835 than making our protocol easier to recognize on the wire.)
2836 - Revise messages on handshake failure again to be even more clear about
2837 which are incoming connections and which are outgoing.
2838 - Discard any v1 directory info that's over 1 month old (for
2839 directories) or over 1 week old (for running-routers lists).
2840 - Do not warn when individual nodes in the configuration's EntryNodes,
2841 ExitNodes, etc are down: warn only when all possible nodes
2842 are down. (Fixes bug 348.)
2843 - Always remove expired routers and networkstatus docs before checking
2844 whether we have enough information to build circuits. (Fixes
2846 - Put a lower-bound on MaxAdvertisedBandwidth.
2849 Changes in version 0.1.2.7-alpha - 2007-02-06
2850 o Major bugfixes (rate limiting):
2851 - Servers decline directory requests much more aggressively when
2852 they're low on bandwidth. Otherwise they end up queueing more and
2853 more directory responses, which can't be good for latency.
2854 - But never refuse directory requests from local addresses.
2855 - Fix a memory leak when sending a 503 response for a networkstatus
2857 - Be willing to read or write on local connections (e.g. controller
2858 connections) even when the global rate limiting buckets are empty.
2859 - If our system clock jumps back in time, don't publish a negative
2860 uptime in the descriptor. Also, don't let the global rate limiting
2861 buckets go absurdly negative.
2862 - Flush local controller connection buffers periodically as we're
2863 writing to them, so we avoid queueing 4+ megabytes of data before
2866 o Major bugfixes (NT services):
2867 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
2868 command-line flag so that admins can override the default by saying
2869 "tor --service install --user "SomeUser"". This will not affect
2870 existing installed services. Also, warn the user that the service
2871 will look for its configuration file in the service user's
2872 %appdata% directory. (We can't do the 'hardwire the user's appdata
2873 directory' trick any more, since we may not have read access to that
2876 o Major bugfixes (other):
2877 - Previously, we would cache up to 16 old networkstatus documents
2878 indefinitely, if they came from nontrusted authorities. Now we
2879 discard them if they are more than 10 days old.
2880 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
2882 - Detect and reject malformed DNS responses containing circular
2884 - If exits are rare enough that we're not marking exits as guards,
2885 ignore exit bandwidth when we're deciding the required bandwidth
2887 - When we're handling a directory connection tunneled over Tor,
2888 don't fill up internal memory buffers with all the data we want
2889 to tunnel; instead, only add it if the OR connection that will
2890 eventually receive it has some room for it. (This can lead to
2891 slowdowns in tunneled dir connections; a better solution will have
2894 o Minor bugfixes (dns):
2895 - Add some defensive programming to eventdns.c in an attempt to catch
2896 possible memory-stomping bugs.
2897 - Detect and reject DNS replies containing IPv4 or IPv6 records with
2898 an incorrect number of bytes. (Previously, we would ignore the
2900 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
2901 in the correct order, and doesn't crash.
2902 - Free memory held in recently-completed DNS lookup attempts on exit.
2903 This was not a memory leak, but may have been hiding memory leaks.
2904 - Handle TTL values correctly on reverse DNS lookups.
2905 - Treat failure to parse resolv.conf as an error.
2907 o Minor bugfixes (other):
2908 - Fix crash with "tor --list-fingerprint" (reported by seeess).
2909 - When computing clock skew from directory HTTP headers, consider what
2910 time it was when we finished asking for the directory, not what
2912 - Expire socks connections if they spend too long waiting for the
2913 handshake to finish. Previously we would let them sit around for
2914 days, if the connecting application didn't close them either.
2915 - And if the socks handshake hasn't started, don't send a
2916 "DNS resolve socks failed" handshake reply; just close it.
2917 - Stop using C functions that OpenBSD's linker doesn't like.
2918 - Don't launch requests for descriptors unless we have networkstatuses
2919 from at least half of the authorities. This delays the first
2920 download slightly under pathological circumstances, but can prevent
2921 us from downloading a bunch of descriptors we don't need.
2922 - Do not log IPs with TLS failures for incoming TLS
2923 connections. (Fixes bug 382.)
2924 - If the user asks to use invalid exit nodes, be willing to use
2926 - Stop using the reserved ac_cv namespace in our configure script.
2927 - Call stat() slightly less often; use fstat() when possible.
2928 - Refactor the way we handle pending circuits when an OR connection
2929 completes or fails, in an attempt to fix a rare crash bug.
2930 - Only rewrite a conn's address based on X-Forwarded-For: headers
2931 if it's a parseable public IP address; and stop adding extra quotes
2932 to the resulting address.
2935 - Weight directory requests by advertised bandwidth. Now we can
2936 let servers enable write limiting but still allow most clients to
2937 succeed at their directory requests. (We still ignore weights when
2938 choosing a directory authority; I hope this is a feature.)
2941 - Create a new file ReleaseNotes which was the old ChangeLog. The
2942 new ChangeLog file now includes the summaries for all development
2944 - Check for addresses with invalid characters at the exit as well
2945 as at the client, and warn less verbosely when they fail. You can
2946 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
2947 - Adapt a patch from goodell to let the contrib/exitlist script
2948 take arguments rather than require direct editing.
2949 - Inform the server operator when we decide not to advertise a
2950 DirPort due to AccountingMax enabled or a low BandwidthRate. It
2951 was confusing Zax, so now we're hopefully more helpful.
2952 - Bring us one step closer to being able to establish an encrypted
2953 directory tunnel without knowing a descriptor first. Still not
2954 ready yet. As part of the change, now assume we can use a
2955 create_fast cell if we don't know anything about a router.
2956 - Allow exit nodes to use nameservers running on ports other than 53.
2957 - Servers now cache reverse DNS replies.
2958 - Add an --ignore-missing-torrc command-line option so that we can
2959 get the "use sensible defaults if the configuration file doesn't
2960 exist" behavior even when specifying a torrc location on the command
2963 o Minor features (controller):
2964 - Track reasons for OR connection failure; make these reasons
2965 available via the controller interface. (Patch from Mike Perry.)
2966 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
2967 can learn when clients are sending malformed hostnames to Tor.
2968 - Clean up documentation for controller status events.
2969 - Add a REMAP status to stream events to note that a stream's
2970 address has changed because of a cached address or a MapAddress
2974 Changes in version 0.1.2.6-alpha - 2007-01-09
2976 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
2977 connection handles more than 4 gigs in either direction, we crash.
2978 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
2979 advertised exit node, somebody might try to exit from us when
2980 we're bootstrapping and before we've built our descriptor yet.
2981 Refuse the connection rather than crashing.
2984 - Warn if we (as a server) find that we've resolved an address that we
2985 weren't planning to resolve.
2986 - Warn that using select() on any libevent version before 1.1 will be
2987 unnecessarily slow (even for select()).
2988 - Flush ERR-level controller status events just like we currently
2989 flush ERR-level log events, so that a Tor shutdown doesn't prevent
2990 the controller from learning about current events.
2992 o Minor features (more controller status events):
2993 - Implement EXTERNAL_ADDRESS server status event so controllers can
2994 learn when our address changes.
2995 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
2996 can learn when directories reject our descriptor.
2997 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
2998 can learn when a client application is speaking a non-socks protocol
3000 - Implement DANGEROUS_SOCKS client status event so controllers
3001 can learn when a client application is leaking DNS addresses.
3002 - Implement BUG general status event so controllers can learn when
3003 Tor is unhappy about its internal invariants.
3004 - Implement CLOCK_SKEW general status event so controllers can learn
3005 when Tor thinks the system clock is set incorrectly.
3006 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
3007 server status events so controllers can learn when their descriptors
3008 are accepted by a directory.
3009 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
3010 server status events so controllers can learn about Tor's progress in
3011 deciding whether it's reachable from the outside.
3012 - Implement BAD_LIBEVENT general status event so controllers can learn
3013 when we have a version/method combination in libevent that needs to
3015 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
3016 and DNS_USELESS server status events so controllers can learn
3017 about changes to DNS server status.
3019 o Minor features (directory):
3020 - Authorities no longer recommend exits as guards if this would shift
3021 too much load to the exit nodes.
3024 Changes in version 0.1.2.5-alpha - 2007-01-06
3026 - Enable write limiting as well as read limiting. Now we sacrifice
3027 capacity if we're pushing out lots of directory traffic, rather
3028 than overrunning the user's intended bandwidth limits.
3029 - Include TLS overhead when counting bandwidth usage; previously, we
3030 would count only the bytes sent over TLS, but not the bytes used
3032 - Support running the Tor service with a torrc not in the same
3033 directory as tor.exe and default to using the torrc located in
3034 the %appdata%\Tor\ of the user who installed the service. Patch
3036 - Servers now check for the case when common DNS requests are going to
3037 wildcarded addresses (i.e. all getting the same answer), and change
3038 their exit policy to reject *:* if it's happening.
3039 - Implement BEGIN_DIR cells, so we can connect to the directory
3040 server via TLS to do encrypted directory requests rather than
3041 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
3042 config options if you like.
3044 o Minor features (config and docs):
3045 - Start using the state file to store bandwidth accounting data:
3046 the bw_accounting file is now obsolete. We'll keep generating it
3047 for a while for people who are still using 0.1.2.4-alpha.
3048 - Try to batch changes to the state file so that we do as few
3049 disk writes as possible while still storing important things in
3051 - The state file and the bw_accounting file get saved less often when
3052 the AvoidDiskWrites config option is set.
3053 - Make PIDFile work on Windows (untested).
3054 - Add internal descriptions for a bunch of configuration options:
3055 accessible via controller interface and in comments in saved
3057 - Reject *:563 (NNTPS) in the default exit policy. We already reject
3058 NNTP by default, so this seems like a sensible addition.
3059 - Clients now reject hostnames with invalid characters. This should
3060 avoid some inadvertent info leaks. Add an option
3061 AllowNonRFC953Hostnames to disable this behavior, in case somebody
3062 is running a private network with hosts called @, !, and #.
3063 - Add a maintainer script to tell us which options are missing
3064 documentation: "make check-docs".
3065 - Add a new address-spec.txt document to describe our special-case
3066 addresses: .exit, .onion, and .noconnnect.
3068 o Minor features (DNS):
3069 - Ongoing work on eventdns infrastructure: now it has dns server
3070 and ipv6 support. One day Tor will make use of it.
3071 - Add client-side caching for reverse DNS lookups.
3072 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
3073 - When we change nameservers or IP addresses, reset and re-launch
3074 our tests for DNS hijacking.
3076 o Minor features (directory):
3077 - Authorities now specify server versions in networkstatus. This adds
3078 about 2% to the size of compressed networkstatus docs, and allows
3079 clients to tell which servers support BEGIN_DIR and which don't.
3080 The implementation is forward-compatible with a proposed future
3081 protocol version scheme not tied to Tor versions.
3082 - DirServer configuration lines now have an orport= option so
3083 clients can open encrypted tunnels to the authorities without
3084 having downloaded their descriptors yet. Enabled for moria1,
3085 moria2, tor26, and lefkada now in the default configuration.
3086 - Directory servers are more willing to send a 503 "busy" if they
3087 are near their write limit, especially for v1 directory requests.
3088 Now they can use their limited bandwidth for actual Tor traffic.
3089 - Clients track responses with status 503 from dirservers. After a
3090 dirserver has given us a 503, we try not to use it until an hour has
3091 gone by, or until we have no dirservers that haven't given us a 503.
3092 - When we get a 503 from a directory, and we're not a server, we don't
3093 count the failure against the total number of failures allowed
3094 for the thing we're trying to download.
3095 - Report X-Your-Address-Is correctly from tunneled directory
3096 connections; don't report X-Your-Address-Is when it's an internal
3097 address; and never believe reported remote addresses when they're
3099 - Protect against an unlikely DoS attack on directory servers.
3100 - Add a BadDirectory flag to network status docs so that authorities
3101 can (eventually) tell clients about caches they believe to be
3104 o Minor features (controller):
3105 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
3106 - Reimplement GETINFO so that info/names stays in sync with the
3108 - Implement "GETINFO fingerprint".
3109 - Implement "SETEVENTS GUARD" so controllers can get updates on
3110 entry guard status as it changes.
3112 o Minor features (clean up obsolete pieces):
3113 - Remove some options that have been deprecated since at least
3114 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
3115 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
3117 - We no longer look for identity and onion keys in "identity.key" and
3118 "onion.key" -- these were replaced by secret_id_key and
3119 secret_onion_key in 0.0.8pre1.
3120 - We no longer require unrecognized directory entries to be
3123 o Major bugfixes (security):
3124 - Stop sending the HttpProxyAuthenticator string to directory
3125 servers when directory connections are tunnelled through Tor.
3126 - Clients no longer store bandwidth history in the state file.
3127 - Do not log introduction points for hidden services if SafeLogging
3129 - When generating bandwidth history, round down to the nearest
3130 1k. When storing accounting data, round up to the nearest 1k.
3131 - When we're running as a server, remember when we last rotated onion
3132 keys, so that we will rotate keys once they're a week old even if
3133 we never stay up for a week ourselves.
3135 o Major bugfixes (other):
3136 - Fix a longstanding bug in eventdns that prevented the count of
3137 timed-out resolves from ever being reset. This bug caused us to
3138 give up on a nameserver the third time it timed out, and try it
3139 10 seconds later... and to give up on it every time it timed out
3141 - Take out the '5 second' timeout from the connection retry
3142 schedule. Now the first connect attempt will wait a full 10
3143 seconds before switching to a new circuit. Perhaps this will help
3144 a lot. Based on observations from Mike Perry.
3145 - Fix a bug on the Windows implementation of tor_mmap_file() that
3146 would prevent the cached-routers file from ever loading. Reported
3150 - Fix an assert failure when a directory authority sets
3151 AuthDirRejectUnlisted and then receives a descriptor from an
3152 unlisted router. Reported by seeess.
3153 - Avoid a double-free when parsing malformed DirServer lines.
3154 - Fix a bug when a BSD-style PF socket is first used. Patch from
3156 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
3157 to resolve an address at a given exit node even when they ask for
3159 - Servers no longer ever list themselves in their "family" line,
3160 even if configured to do so. This makes it easier to configure
3161 family lists conveniently.
3162 - When running as a server, don't fall back to 127.0.0.1 when no
3163 nameservers are configured in /etc/resolv.conf; instead, make the
3164 user fix resolv.conf or specify nameservers explicitly. (Resolves
3166 - Stop accepting certain malformed ports in configured exit policies.
3167 - Don't re-write the fingerprint file every restart, unless it has
3169 - Stop warning when a single nameserver fails: only warn when _all_ of
3170 our nameservers have failed. Also, when we only have one nameserver,
3171 raise the threshold for deciding that the nameserver is dead.
3172 - Directory authorities now only decide that routers are reachable
3173 if their identity keys are as expected.
3174 - When the user uses bad syntax in the Log config line, stop
3175 suggesting other bad syntax as a replacement.
3176 - Correctly detect ipv6 DNS capability on OpenBSD.
3178 o Minor bugfixes (controller):
3179 - Report the circuit number correctly in STREAM CLOSED events. Bug
3180 reported by Mike Perry.
3181 - Do not report bizarre values for results of accounting GETINFOs
3182 when the last second's write or read exceeds the allotted bandwidth.
3183 - Report "unrecognized key" rather than an empty string when the
3184 controller tries to fetch a networkstatus that doesn't exist.
3187 Changes in version 0.1.1.26 - 2006-12-14
3188 o Security bugfixes:
3189 - Stop sending the HttpProxyAuthenticator string to directory
3190 servers when directory connections are tunnelled through Tor.
3191 - Clients no longer store bandwidth history in the state file.
3192 - Do not log introduction points for hidden services if SafeLogging
3196 - Fix an assert failure when a directory authority sets
3197 AuthDirRejectUnlisted and then receives a descriptor from an
3198 unlisted router (reported by seeess).
3201 Changes in version 0.1.2.4-alpha - 2006-12-03
3203 - Add support for using natd; this allows FreeBSDs earlier than
3204 5.1.2 to have ipfw send connections through Tor without using
3205 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
3208 - Make all connections to addresses of the form ".noconnect"
3209 immediately get closed. This lets application/controller combos
3210 successfully test whether they're talking to the same Tor by
3211 watching for STREAM events.
3212 - Make cross.sh cross-compilation script work even when autogen.sh
3213 hasn't been run. (Patch from Michael Mohr.)
3214 - Statistics dumped by -USR2 now include a breakdown of public key
3215 operations, for profiling.
3218 - Fix a major leak when directory authorities parse their
3219 approved-routers list, a minor memory leak when we fail to pick
3220 an exit node, and a few rare leaks on errors.
3221 - Handle TransPort connections even when the server sends data before
3222 the client sends data. Previously, the connection would just hang
3223 until the client sent data. (Patch from tup based on patch from
3225 - Avoid assert failure when our cached-routers file is empty on
3229 - Don't log spurious warnings when we see a circuit close reason we
3230 don't recognize; it's probably just from a newer version of Tor.
3231 - Have directory authorities allow larger amounts of drift in uptime
3232 without replacing the server descriptor: previously, a server that
3233 restarted every 30 minutes could have 48 "interesting" descriptors
3235 - Start linking to the Tor specification and Tor reference manual
3236 correctly in the Windows installer.
3237 - Add Vidalia to the OS X uninstaller script, so when we uninstall
3238 Tor/Privoxy we also uninstall Vidalia.
3239 - Resume building on Irix64, and fix a lot of warnings from its
3241 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
3242 when we're running as a client.
3245 Changes in version 0.1.1.25 - 2006-11-04
3247 - When a client asks us to resolve (rather than connect to)
3248 an address, and we have a cached answer, give them the cached
3249 answer. Previously, we would give them no answer at all.
3250 - We were building exactly the wrong circuits when we predict
3251 hidden service requirements, meaning Tor would have to build all
3252 its circuits on demand.
3253 - If none of our live entry guards have a high uptime, but we
3254 require a guard with a high uptime, try adding a new guard before
3255 we give up on the requirement. This patch should make long-lived
3256 connections more stable on average.
3257 - When testing reachability of our DirPort, don't launch new
3258 tests when there's already one in progress -- unreachable
3259 servers were stacking up dozens of testing streams.
3261 o Security bugfixes:
3262 - When the user sends a NEWNYM signal, clear the client-side DNS
3263 cache too. Otherwise we continue to act on previous information.
3266 - Avoid a memory corruption bug when creating a hash table for
3268 - Avoid possibility of controller-triggered crash when misusing
3269 certain commands from a v0 controller on platforms that do not
3270 handle printf("%s",NULL) gracefully.
3271 - Avoid infinite loop on unexpected controller input.
3272 - Don't log spurious warnings when we see a circuit close reason we
3273 don't recognize; it's probably just from a newer version of Tor.
3274 - Add Vidalia to the OS X uninstaller script, so when we uninstall
3275 Tor/Privoxy we also uninstall Vidalia.
3278 Changes in version 0.1.2.3-alpha - 2006-10-29
3280 - Prepare for servers to publish descriptors less often: never
3281 discard a descriptor simply for being too old until either it is
3282 recommended by no authorities, or until we get a better one for
3283 the same router. Make caches consider retaining old recommended
3284 routers for even longer.
3285 - If most authorities set a BadExit flag for a server, clients
3286 don't think of it as a general-purpose exit. Clients only consider
3287 authorities that advertise themselves as listing bad exits.
3288 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
3289 headers for content, so that we can work better in the presence of
3290 caching HTTP proxies.
3291 - Allow authorities to list nodes as bad exits by fingerprint or by
3294 o Minor features, controller:
3295 - Add a REASON field to CIRC events; for backward compatibility, this
3296 field is sent only to controllers that have enabled the extended
3297 event format. Also, add additional reason codes to explain why
3298 a given circuit has been destroyed or truncated. (Patches from
3300 - Add a REMOTE_REASON field to extended CIRC events to tell the
3301 controller about why a remote OR told us to close a circuit.
3302 - Stream events also now have REASON and REMOTE_REASON fields,
3303 working much like those for circuit events.
3304 - There's now a GETINFO ns/... field so that controllers can ask Tor
3305 about the current status of a router.
3306 - A new event type "NS" to inform a controller when our opinion of
3307 a router's status has changed.
3308 - Add a GETINFO events/names and GETINFO features/names so controllers
3309 can tell which events and features are supported.
3310 - A new CLEARDNSCACHE signal to allow controllers to clear the
3311 client-side DNS cache without expiring circuits.
3313 o Security bugfixes:
3314 - When the user sends a NEWNYM signal, clear the client-side DNS
3315 cache too. Otherwise we continue to act on previous information.
3318 - Avoid sending junk to controllers or segfaulting when a controller
3319 uses EVENT_NEW_DESC with verbose nicknames.
3320 - Stop triggering asserts if the controller tries to extend hidden
3321 service circuits (reported by mwenge).
3322 - Avoid infinite loop on unexpected controller input.
3323 - When the controller does a "GETINFO network-status", tell it
3324 about even those routers whose descriptors are very old, and use
3325 long nicknames where appropriate.
3326 - Change NT service functions to be loaded on demand. This lets us
3327 build with MinGW without breaking Tor for Windows 98 users.
3328 - Do DirPort reachability tests less often, since a single test
3329 chews through many circuits before giving up.
3330 - In the hidden service example in torrc.sample, stop recommending
3331 esoteric and discouraged hidden service options.
3332 - When stopping an NT service, wait up to 10 sec for it to actually
3333 stop. (Patch from Matt Edman; resolves bug 295.)
3334 - Fix handling of verbose nicknames with ORCONN controller events:
3335 make them show up exactly when requested, rather than exactly when
3337 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
3338 printing a duplicate "$" in the keys we send (reported by mwenge).
3339 - Correctly set maximum connection limit on Cygwin. (This time
3341 - Try to detect Windows correctly when cross-compiling.
3342 - Detect the size of the routers file correctly even if it is
3343 corrupted (on systems without mmap) or not page-aligned (on systems
3344 with mmap). This bug was harmless.
3345 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
3346 to open a stream fails; now we do in more cases. This should
3347 make clients able to find a good exit faster in some cases, since
3348 unhandleable requests will now get an error rather than timing out.
3349 - Resolve two memory leaks when rebuilding the on-disk router cache
3350 (reported by fookoowa).
3351 - Clean up minor code warnings suggested by the MIPSpro C compiler,
3352 and reported by some Centos users.
3353 - Controller signals now work on non-Unix platforms that don't define
3354 SIGUSR1 and SIGUSR2 the way we expect.
3355 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
3356 values before failing, and always enables eventdns.
3357 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
3358 Try to fix this in configure.in by checking for most functions
3359 before we check for libevent.
3362 Changes in version 0.1.2.2-alpha - 2006-10-07
3364 - Make our async eventdns library on-by-default for Tor servers,
3365 and plan to deprecate the separate dnsworker threads.
3366 - Add server-side support for "reverse" DNS lookups (using PTR
3367 records so clients can determine the canonical hostname for a given
3368 IPv4 address). Only supported by servers using eventdns; servers
3369 now announce in their descriptors whether they support eventdns.
3370 - Specify and implement client-side SOCKS5 interface for reverse DNS
3371 lookups (see doc/socks-extensions.txt).
3372 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
3373 connect to directory servers through Tor. Previously, clients needed
3374 to find Tor exits to make private connections to directory servers.
3375 - Avoid choosing Exit nodes for entry or middle hops when the
3376 total bandwidth available from non-Exit nodes is much higher than
3377 the total bandwidth available from Exit nodes.
3378 - Workaround for name servers (like Earthlink's) that hijack failing
3379 DNS requests and replace the no-such-server answer with a "helpful"
3380 redirect to an advertising-driven search portal. Also work around
3381 DNS hijackers who "helpfully" decline to hijack known-invalid
3382 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
3383 lets you turn it off.
3384 - Send out a burst of long-range padding cells once we've established
3385 that we're reachable. Spread them over 4 circuits, so hopefully
3386 a few will be fast. This exercises our bandwidth and bootstraps
3387 us into the directory more quickly.
3389 o New/improved config options:
3390 - Add new config option "ResolvConf" to let the server operator
3391 choose an alternate resolve.conf file when using eventdns.
3392 - Add an "EnforceDistinctSubnets" option to control our "exclude
3393 servers on the same /16" behavior. It's still on by default; this
3394 is mostly for people who want to operate private test networks with
3395 all the machines on the same subnet.
3396 - If one of our entry guards is on the ExcludeNodes list, or the
3397 directory authorities don't think it's a good guard, treat it as
3398 if it were unlisted: stop using it as a guard, and throw it off
3399 the guards list if it stays that way for a long time.
3400 - Allow directory authorities to be marked separately as authorities
3401 for the v1 directory protocol, the v2 directory protocol, and
3402 as hidden service directories, to make it easier to retire old
3403 authorities. V1 authorities should set "HSAuthoritativeDir 1"
3404 to continue being hidden service authorities too.
3405 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
3407 o Minor features, controller:
3408 - Fix CIRC controller events so that controllers can learn the
3409 identity digests of non-Named servers used in circuit paths.
3410 - Let controllers ask for more useful identifiers for servers. Instead
3411 of learning identity digests for un-Named servers and nicknames
3412 for Named servers, the new identifiers include digest, nickname,
3413 and indication of Named status. Off by default; see control-spec.txt
3414 for more information.
3415 - Add a "getinfo address" controller command so it can display Tor's
3416 best guess to the user.
3417 - New controller event to alert the controller when our server
3418 descriptor has changed.
3419 - Give more meaningful errors on controller authentication failure.
3421 o Minor features, other:
3422 - When asked to resolve a hostname, don't use non-exit servers unless
3423 requested to do so. This allows servers with broken DNS to be
3424 useful to the network.
3425 - Divide eventdns log messages into warn and info messages.
3426 - Reserve the nickname "Unnamed" for routers that can't pick
3427 a hostname: any router can call itself Unnamed; directory
3428 authorities will never allocate Unnamed to any particular router;
3429 clients won't believe that any router is the canonical Unnamed.
3430 - Only include function names in log messages for info/debug messages.
3431 For notice/warn/err, the content of the message should be clear on
3432 its own, and printing the function name only confuses users.
3433 - Avoid some false positives during reachability testing: don't try
3434 to test via a server that's on the same /24 as us.
3435 - If we fail to build a circuit to an intended enclave, and it's
3436 not mandatory that we use that enclave, stop wanting it.
3437 - When eventdns is enabled, allow multithreaded builds on NetBSD and
3438 OpenBSD. (We had previously disabled threads on these platforms
3439 because they didn't have working thread-safe resolver functions.)
3441 o Major bugfixes, anonymity/security:
3442 - If a client asked for a server by name, and there's a named server
3443 in our network-status but we don't have its descriptor yet, we
3444 could return an unnamed server instead.
3445 - Fix NetBSD bug that could allow someone to force uninitialized RAM
3446 to be sent to a server's DNS resolver. This only affects NetBSD
3447 and other platforms that do not bounds-check tolower().
3448 - Reject (most) attempts to use Tor circuits with length one. (If
3449 many people start using Tor as a one-hop proxy, exit nodes become
3450 a more attractive target for compromise.)
3451 - Just because your DirPort is open doesn't mean people should be
3452 able to remotely teach you about hidden service descriptors. Now
3453 only accept rendezvous posts if you've got HSAuthoritativeDir set.
3455 o Major bugfixes, other:
3456 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
3457 - When a client asks the server to resolve (not connect to)
3458 an address, and it has a cached answer, give them the cached answer.
3459 Previously, the server would give them no answer at all.
3460 - Allow really slow clients to not hang up five minutes into their
3461 directory downloads (suggested by Adam J. Richter).
3462 - We were building exactly the wrong circuits when we anticipated
3463 hidden service requirements, meaning Tor would have to build all
3464 its circuits on demand.
3465 - Avoid crashing when we mmap a router cache file of size 0.
3466 - When testing reachability of our DirPort, don't launch new
3467 tests when there's already one in progress -- unreachable
3468 servers were stacking up dozens of testing streams.
3470 o Minor bugfixes, correctness:
3471 - If we're a directory mirror and we ask for "all" network status
3472 documents, we would discard status documents from authorities
3474 - Avoid a memory corruption bug when creating a hash table for
3476 - Avoid controller-triggered crash when misusing certain commands
3477 from a v0 controller on platforms that do not handle
3478 printf("%s",NULL) gracefully.
3479 - Don't crash when a controller sends a third argument to an
3480 "extendcircuit" request.
3481 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
3482 response; fix error code when "getinfo dir/status/" fails.
3483 - Avoid crash when telling controller stream-status and a stream
3485 - Patch from Adam Langley to fix assert() in eventdns.c.
3486 - Fix a debug log message in eventdns to say "X resolved to Y"
3487 instead of "X resolved to X".
3488 - Make eventdns give strings for DNS errors, not just error numbers.
3489 - Track unreachable entry guards correctly: don't conflate
3490 'unreachable by us right now' with 'listed as down by the directory
3491 authorities'. With the old code, if a guard was unreachable by
3492 us but listed as running, it would clog our guard list forever.
3493 - Behave correctly in case we ever have a network with more than
3494 2GB/s total advertised capacity.
3495 - Make TrackExitHosts case-insensitive, and fix the behavior of
3496 ".suffix" TrackExitHosts items to avoid matching in the middle of
3498 - Finally fix the openssl warnings from newer gccs that believe that
3499 ignoring a return value is okay, but casting a return value and
3500 then ignoring it is a sign of madness.
3501 - Prevent the contrib/exitlist script from printing the same
3502 result more than once.
3503 - Patch from Steve Hildrey: Generate network status correctly on
3504 non-versioning dirservers.
3505 - Don't listen to the X-Your-Address-Is hint if you did the lookup
3506 via Tor; otherwise you'll think you're the exit node's IP address.
3508 o Minor bugfixes, performance:
3509 - Two small performance improvements on parsing descriptors.
3510 - Major performance improvement on inserting descriptors: change
3511 algorithm from O(n^2) to O(n).
3512 - Make the common memory allocation path faster on machines where
3513 malloc(0) returns a pointer.
3514 - Start remembering X-Your-Address-Is directory hints even if you're
3515 a client, so you can become a server more smoothly.
3516 - Avoid duplicate entries on MyFamily line in server descriptor.
3518 o Packaging, features:
3519 - Remove architecture from OS X builds. The official builds are
3520 now universal binaries.
3521 - The Debian package now uses --verify-config when (re)starting,
3522 to distinguish configuration errors from other errors.
3523 - Update RPMs to require libevent 1.1b.
3525 o Packaging, bugfixes:
3526 - Patches so Tor builds with MinGW on Windows.
3527 - Patches so Tor might run on Cygwin again.
3528 - Resume building on non-gcc compilers and ancient gcc. Resume
3529 building with the -O0 compile flag. Resume building cleanly on
3531 - Run correctly on OS X platforms with case-sensitive filesystems.
3532 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
3533 - Add autoconf checks so Tor can build on Solaris x86 again.
3536 - Documented (and renamed) ServerDNSSearchDomains and
3537 ServerDNSResolvConfFile options.
3538 - Be clearer that the *ListenAddress directives can be repeated
3542 Changes in version 0.1.1.24 - 2006-09-29
3544 - Allow really slow clients to not hang up five minutes into their
3545 directory downloads (suggested by Adam J. Richter).
3546 - Fix major performance regression from 0.1.0.x: instead of checking
3547 whether we have enough directory information every time we want to
3548 do something, only check when the directory information has changed.
3549 This should improve client CPU usage by 25-50%.
3550 - Don't crash if, after a server has been running for a while,
3551 it can't resolve its hostname.
3554 - Allow Tor to start when RunAsDaemon is set but no logs are set.
3555 - Don't crash when the controller receives a third argument to an
3556 "extendcircuit" request.
3557 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
3558 response; fix error code when "getinfo dir/status/" fails.
3559 - Fix configure.in to not produce broken configure files with
3560 more recent versions of autoconf. Thanks to Clint for his auto*
3562 - Fix security bug on NetBSD that could allow someone to force
3563 uninitialized RAM to be sent to a server's DNS resolver. This
3564 only affects NetBSD and other platforms that do not bounds-check
3566 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
3567 methods: these are known to be buggy.
3568 - If we're a directory mirror and we ask for "all" network status
3569 documents, we would discard status documents from authorities
3573 Changes in version 0.1.2.1-alpha - 2006-08-27
3575 - Add "eventdns" async dns library from Adam Langley, tweaked to
3576 build on OSX and Windows. Only enabled if you pass the
3577 --enable-eventdns argument to configure.
3578 - Allow servers with no hostname or IP address to learn their
3579 IP address by asking the directory authorities. This code only
3580 kicks in when you would normally have exited with a "no address"
3581 error. Nothing's authenticated, so use with care.
3582 - Rather than waiting a fixed amount of time between retrying
3583 application connections, we wait only 5 seconds for the first,
3584 10 seconds for the second, and 15 seconds for each retry after
3585 that. Hopefully this will improve the expected user experience.
3586 - Patch from Tup to add support for transparent AP connections:
3587 this basically bundles the functionality of trans-proxy-tor
3588 into the Tor mainline. Now hosts with compliant pf/netfilter
3589 implementations can redirect TCP connections straight to Tor
3590 without diverting through SOCKS. Needs docs.
3591 - Busy directory servers save lots of memory by spooling server
3592 descriptors, v1 directories, and v2 networkstatus docs to buffers
3593 as needed rather than en masse. Also mmap the cached-routers
3594 files, so we don't need to keep the whole thing in memory too.
3595 - Automatically avoid picking more than one node from the same
3596 /16 network when constructing a circuit.
3597 - Revise and clean up the torrc.sample that we ship with; add
3598 a section for BandwidthRate and BandwidthBurst.
3601 - Split circuit_t into origin_circuit_t and or_circuit_t, and
3602 split connection_t into edge, or, dir, control, and base structs.
3603 These will save quite a bit of memory on busy servers, and they'll
3604 also help us track down bugs in the code and bugs in the spec.
3605 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
3606 or later. Log when we are doing this, so we can diagnose it when
3607 it fails. (Also, recommend libevent 1.1b for kqueue and
3608 win32 methods; deprecate libevent 1.0b harder; make libevent
3609 recommendation system saner.)
3610 - Start being able to build universal binaries on OS X (thanks
3612 - Export the default exit policy via the control port, so controllers
3613 don't need to guess what it is / will be later.
3614 - Add a man page entry for ProtocolWarnings.
3615 - Add TestVia config option to the man page.
3616 - Remove even more protocol-related warnings from Tor server logs,
3617 such as bad TLS handshakes and malformed begin cells.
3618 - Stop fetching descriptors if you're not a dir mirror and you
3619 haven't tried to establish any circuits lately. [This currently
3620 causes some dangerous behavior, because when you start up again
3621 you'll use your ancient server descriptors.]
3622 - New DirPort behavior: if you have your dirport set, you download
3623 descriptors aggressively like a directory mirror, whether or not
3625 - Get rid of the router_retry_connections notion. Now routers
3626 no longer try to rebuild long-term connections to directory
3627 authorities, and directory authorities no longer try to rebuild
3628 long-term connections to all servers. We still don't hang up
3629 connections in these two cases though -- we need to look at it
3630 more carefully to avoid flapping, and we likely need to wait til
3631 0.1.1.x is obsolete.
3632 - Drop compatibility with obsolete Tors that permit create cells
3633 to have the wrong circ_id_type.
3634 - Re-enable per-connection rate limiting. Get rid of the "OP
3635 bandwidth" concept. Lay groundwork for "bandwidth classes" --
3636 separate global buckets that apply depending on what sort of conn
3638 - Start publishing one minute or so after we find our ORPort
3639 to be reachable. This will help reduce the number of descriptors
3640 we have for ourselves floating around, since it's quite likely
3641 other things (e.g. DirPort) will change during that minute too.
3642 - Fork the v1 directory protocol into its own spec document,
3643 and mark dir-spec.txt as the currently correct (v2) spec.
3646 - When we find our DirPort to be reachable, publish a new descriptor
3647 so we'll tell the world (reported by pnx).
3648 - Publish a new descriptor after we hup/reload. This is important
3649 if our config has changed such that we'll want to start advertising
3650 our DirPort now, etc.
3651 - Allow Tor to start when RunAsDaemon is set but no logs are set.
3652 - When we have a state file we cannot parse, tell the user and
3653 move it aside. Now we avoid situations where the user starts
3654 Tor in 1904, Tor writes a state file with that timestamp in it,
3655 the user fixes her clock, and Tor refuses to start.
3656 - Fix configure.in to not produce broken configure files with
3657 more recent versions of autoconf. Thanks to Clint for his auto*
3659 - "tor --verify-config" now exits with -1(255) or 0 depending on
3660 whether the config options are bad or good.
3661 - Resolve bug 321 when using dnsworkers: append a period to every
3662 address we resolve at the exit node, so that we do not accidentally
3663 pick up local addresses, and so that failing searches are retried
3664 in the resolver search domains. (This is already solved for
3665 eventdns.) (This breaks Blossom servers for now.)
3666 - If we are using an exit enclave and we can't connect, e.g. because
3667 its webserver is misconfigured to not listen on localhost, then
3668 back off and try connecting from somewhere else before we fail.
3671 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
3672 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
3673 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
3674 when the IP address is mapped through MapAddress to a hostname.
3675 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
3676 useless IPv6 DNS resolves.
3677 - Patch suggested by Karsten Loesing: respond to SIGNAL command
3678 before we execute the signal, in case the signal shuts us down.
3679 - Clean up AllowInvalidNodes man page entry.
3680 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
3681 - Add more asserts to track down an assert error on a windows Tor
3682 server with connection_add being called with socket == -1.
3683 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
3684 - Fix misleading log messages: an entry guard that is "unlisted",
3685 as well as not known to be "down" (because we've never heard
3686 of it), is not therefore "up".
3687 - Remove code to special-case "-cvs" ending, since it has not
3688 actually mattered since 0.0.9.
3689 - Make our socks5 handling more robust to broken socks clients:
3690 throw out everything waiting on the buffer in between socks
3691 handshake phases, since they can't possibly (so the theory
3692 goes) have predicted what we plan to respond to them.
3695 Changes in version 0.1.1.23 - 2006-07-30
3697 - Fast Tor servers, especially exit nodes, were triggering asserts
3698 due to a bug in handling the list of pending DNS resolves. Some
3699 bugs still remain here; we're hunting them.
3700 - Entry guards could crash clients by sending unexpected input.
3701 - More fixes on reachability testing: if you find yourself reachable,
3702 then don't ever make any client requests (so you stop predicting
3703 circuits), then hup or have your clock jump, then later your IP
3704 changes, you won't think circuits are working, so you won't try to
3705 test reachability, so you won't publish.
3708 - Avoid a crash if the controller does a resetconf firewallports
3709 and then a setconf fascistfirewall=1.
3710 - Avoid an integer underflow when the dir authority decides whether
3711 a router is stable: we might wrongly label it stable, and compute
3712 a slightly wrong median stability, when a descriptor is published
3714 - Fix a place where we might trigger an assert if we can't build our
3715 own server descriptor yet.
3718 Changes in version 0.1.1.22 - 2006-07-05
3720 - Fix a big bug that was causing servers to not find themselves
3721 reachable if they changed IP addresses. Since only 0.1.1.22+
3722 servers can do reachability testing correctly, now we automatically
3723 make sure to test via one of these.
3724 - Fix to allow clients and mirrors to learn directory info from
3725 descriptor downloads that get cut off partway through.
3726 - Directory authorities had a bug in deciding if a newly published
3727 descriptor was novel enough to make everybody want a copy -- a few
3728 servers seem to be publishing new descriptors many times a minute.
3730 - Fix a rare bug that was causing some servers to complain about
3731 "closing wedged cpuworkers" and skip some circuit create requests.
3732 - Make the Exit flag in directory status documents actually work.
3735 Changes in version 0.1.1.21 - 2006-06-10
3736 o Crash and assert fixes from 0.1.1.20:
3737 - Fix a rare crash on Tor servers that have enabled hibernation.
3738 - Fix a seg fault on startup for Tor networks that use only one
3739 directory authority.
3740 - Fix an assert from a race condition that occurs on Tor servers
3741 while exiting, where various threads are trying to log that they're
3742 exiting, and delete the logs, at the same time.
3743 - Make our unit tests pass again on certain obscure platforms.
3746 - Add support for building SUSE RPM packages.
3747 - Speed up initial bootstrapping for clients: if we are making our
3748 first ever connection to any entry guard, then don't mark it down
3750 - When only one Tor server in the network is labelled as a guard,
3751 and we've already picked him, we would cycle endlessly picking him
3752 again, being unhappy about it, etc. Now we specifically exclude
3753 current guards when picking a new guard.
3754 - Servers send create cells more reliably after the TLS connection
3755 is established: we were sometimes forgetting to send half of them
3756 when we had more than one pending.
3757 - If we get a create cell that asks us to extend somewhere, but the
3758 Tor server there doesn't match the expected digest, we now send
3759 a destroy cell back, rather than silently doing nothing.
3760 - Make options->RedirectExit work again.
3761 - Make cookie authentication for the controller work again.
3762 - Stop being picky about unusual characters in the arguments to
3763 mapaddress. It's none of our business.
3764 - Add a new config option "TestVia" that lets you specify preferred
3765 middle hops to use for test circuits. Perhaps this will let me
3766 debug the reachability problems better.
3768 o Log / documentation fixes:
3769 - If we're a server and some peer has a broken TLS certificate, don't
3770 log about it unless ProtocolWarnings is set, i.e., we want to hear
3771 about protocol violations by others.
3772 - Fix spelling of VirtualAddrNetwork in man page.
3773 - Add a better explanation at the top of the autogenerated torrc file
3774 about what happened to our old torrc.
3777 Changes in version 0.1.1.20 - 2006-05-23
3779 - Downgrade a log severity where servers complain that they're
3781 - Avoid a compile warning on FreeBSD.
3782 - Remove string size limit on NEWDESC messages; solve bug 291.
3783 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
3784 more thoroughly when we're running on windows.
3787 Changes in version 0.1.1.19-rc - 2006-05-03
3789 - Regenerate our local descriptor if it's dirty and we try to use
3790 it locally (e.g. if it changes during reachability detection).
3791 - If we setconf our ORPort to 0, we continued to listen on the
3792 old ORPort and receive connections.
3793 - Avoid a second warning about machine/limits.h on Debian
3795 - Be willing to add our own routerinfo into the routerlist.
3796 Now authorities will include themselves in their directories
3797 and network-statuses.
3798 - Stop trying to upload rendezvous descriptors to every
3799 directory authority: only try the v1 authorities.
3800 - Servers no longer complain when they think they're not
3801 registered with the directory authorities. There were too many
3803 - Backport dist-rpm changes so rpms can be built without errors.
3806 - Implement an option, VirtualAddrMask, to set which addresses
3807 get handed out in response to mapaddress requests. This works
3808 around a bug in tsocks where 127.0.0.0/8 is never socksified.
3811 Changes in version 0.1.1.18-rc - 2006-04-10
3813 - Work harder to download live network-statuses from all the
3814 directory authorities we know about. Improve the threshold
3815 decision logic so we're more robust to edge cases.
3816 - When fetching rendezvous descriptors, we were willing to ask
3817 v2 authorities too, which would always return 404.
3820 - Stop listing down or invalid nodes in the v1 directory. This will
3821 reduce its bulk by about 1/3, and reduce load on directory
3823 - When deciding whether a router is Fast or Guard-worthy, consider
3824 his advertised BandwidthRate and not just the BandwidthCapacity.
3825 - No longer ship INSTALL and README files -- they are useless now.
3826 - Force rpmbuild to behave and honor target_cpu.
3827 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
3828 - Start to include translated versions of the tor-doc-*.html
3829 files, along with the screenshots. Still needs more work.
3830 - Start sending back 512 and 451 errors if mapaddress fails,
3831 rather than not sending anything back at all.
3832 - When we fail to bind or listen on an incoming or outgoing
3833 socket, we should close it before failing. otherwise we just
3834 leak it. (thanks to weasel for finding.)
3835 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
3836 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
3837 - Make NoPublish (even though deprecated) work again.
3838 - Fix a minor security flaw where a versioning auth dirserver
3839 could list a recommended version many times in a row to make
3840 clients more convinced that it's recommended.
3841 - Fix crash bug if there are two unregistered servers running
3842 with the same nickname, one of them is down, and you ask for
3843 them by nickname in your EntryNodes or ExitNodes. Also, try
3844 to pick the one that's running rather than an arbitrary one.
3845 - Fix an infinite loop we could hit if we go offline for too long.
3846 - Complain when we hit WSAENOBUFS on recv() or write() too.
3847 Perhaps this will help us hunt the bug.
3848 - If you're not a versioning dirserver, don't put the string
3849 "client-versions \nserver-versions \n" in your network-status.
3850 - Lower the minimum required number of file descriptors to 1000,
3851 so we can have some overhead for Valgrind on Linux, where the
3852 default ulimit -n is 1024.
3855 - Add tor.dizum.com as the fifth authoritative directory server.
3856 - Add a new config option FetchUselessDescriptors, off by default,
3857 for when you plan to run "exitlist" on your client and you want
3858 to know about even the non-running descriptors.
3861 Changes in version 0.1.1.17-rc - 2006-03-28
3863 - Clients and servers since 0.1.1.10-alpha have been expiring
3864 connections whenever they are idle for 5 minutes and they *do*
3865 have circuits on them. Oops. With this new version, clients will
3866 discard their previous entry guard choices and avoid choosing
3867 entry guards running these flawed versions.
3868 - Fix memory leak when uncompressing concatenated zlib streams. This
3869 was causing substantial leaks over time on Tor servers.
3870 - The v1 directory was including servers as much as 48 hours old,
3871 because that's how the new routerlist->routers works. Now only
3872 include them if they're 20 hours old or less.
3875 - Resume building on irix64, netbsd 2.0, etc.
3876 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
3878 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
3879 and it is confusing some users.
3880 - Mirrors stop caching the v1 directory so often.
3881 - Make the max number of old descriptors that a cache will hold
3882 rise with the number of directory authorities, so we can scale.
3883 - Change our win32 uname() hack to be more forgiving about what
3884 win32 versions it thinks it's found.
3887 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
3889 - When the controller's *setconf commands fail, collect an error
3890 message in a string and hand it back to the controller.
3891 - Make the v2 dir's "Fast" flag based on relative capacity, just
3892 like "Stable" is based on median uptime. Name everything in the
3893 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
3894 - Log server fingerprint on startup, so new server operators don't
3895 have to go hunting around their filesystem for it.
3896 - Return a robots.txt on our dirport to discourage google indexing.
3897 - Let the controller ask for GETINFO dir/status/foo so it can ask
3898 directly rather than connecting to the dir port. Only works when
3899 dirport is set for now.
3901 o New config options rather than constants in the code:
3902 - SocksTimeout: How long do we let a socks connection wait
3903 unattached before we fail it?
3904 - CircuitBuildTimeout: Cull non-open circuits that were born
3905 at least this many seconds ago.
3906 - CircuitIdleTimeout: Cull open clean circuits that were born
3907 at least this many seconds ago.
3910 Changes in version 0.1.1.16-rc - 2006-03-18
3911 o Bugfixes on 0.1.1.15-rc:
3912 - Fix assert when the controller asks to attachstream a connect-wait
3913 or resolve-wait stream.
3914 - Now do address rewriting when the controller asks us to attach
3915 to a particular circuit too. This will let Blossom specify
3916 "moria2.exit" without having to learn what moria2's IP address is.
3917 - Make the "tor --verify-config" command-line work again, so people
3918 can automatically check if their torrc will parse.
3919 - Authoritative dirservers no longer require an open connection from
3920 a server to consider him "reachable". We need this change because
3921 when we add new auth dirservers, old servers won't know not to
3923 - Let Tor build on Sun CC again.
3924 - Fix an off-by-one buffer size in dirserv.c that magically never
3925 hit our three authorities but broke sjmurdoch's own tor network.
3926 - If we as a directory mirror don't know of any v1 directory
3927 authorities, then don't try to cache any v1 directories.
3928 - Stop warning about unknown servers in our family when they are
3929 given as hex digests.
3930 - Stop complaining as quickly to the server operator that he
3931 hasn't registered his nickname/key binding.
3932 - Various cleanups so we can add new V2 Auth Dirservers.
3933 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
3934 reflect the updated flags in our v2 dir protocol.
3935 - Resume allowing non-printable characters for exit streams (both
3936 for connecting and for resolving). Now we tolerate applications
3937 that don't follow the RFCs. But continue to block malformed names
3940 o Bugfixes on 0.1.0.x:
3941 - Fix assert bug in close_logs(): when we close and delete logs,
3942 remove them all from the global "logfiles" list.
3943 - Fix minor integer overflow in calculating when we expect to use up
3944 our bandwidth allocation before hibernating.
3945 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
3946 there are multiple SSLs installed with different versions.
3947 - When we try to be a server and Address is not explicitly set and
3948 our hostname resolves to a private IP address, try to use an
3949 interface address if it has a public address. Now Windows machines
3950 that think of themselves as localhost can work by default.
3953 - Let the controller ask for GETINFO dir/server/foo so it can ask
3954 directly rather than connecting to the dir port.
3955 - Let the controller tell us about certain router descriptors
3956 that it doesn't want Tor to use in circuits. Implement
3957 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
3958 - New config option SafeSocks to reject all application connections
3959 using unsafe socks protocols. Defaults to off.
3962 Changes in version 0.1.1.15-rc - 2006-03-11
3963 o Bugfixes and cleanups:
3964 - When we're printing strings from the network, don't try to print
3965 non-printable characters. This protects us against shell escape
3966 sequence exploits, and also against attacks to fool humans into
3967 misreading their logs.
3968 - Fix a bug where Tor would fail to establish any connections if you
3969 left it off for 24 hours and then started it: we were happy with
3970 the obsolete network statuses, but they all referred to router
3971 descriptors that were too old to fetch, so we ended up with no
3972 valid router descriptors.
3973 - Fix a seg fault in the controller's "getinfo orconn-status"
3974 command while listing status on incoming handshaking connections.
3975 Introduce a status name "NEW" for these connections.
3976 - If we get a linelist or linelist_s config option from the torrc
3977 (e.g. ExitPolicy) and it has no value, warn and skip rather than
3978 silently resetting it to its default.
3979 - Don't abandon entry guards until they've been down or gone for
3981 - Cleaner and quieter log messages.
3984 - New controller signal NEWNYM that makes new application requests
3986 - Add a new circuit purpose 'controller' to let the controller ask
3987 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
3988 controller command to let you specify the purpose if you're
3989 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
3990 command to let you change a circuit's purpose after it's been
3992 - Accept "private:*" in routerdesc exit policies; not generated yet
3993 because older Tors do not understand it.
3994 - Add BSD-style contributed startup script "rc.subr" from Peter
3998 Changes in version 0.1.1.14-alpha - 2006-02-20
3999 o Bugfixes on 0.1.1.x:
4000 - Don't die if we ask for a stdout or stderr log (even implicitly)
4001 and we're set to RunAsDaemon -- just warn.
4002 - We still had a few bugs in the OR connection rotation code that
4003 caused directory servers to slowly aggregate connections to other
4004 fast Tor servers. This time for sure!
4005 - Make log entries on Win32 include the name of the function again.
4006 - We were treating a pair of exit policies if they were equal even
4007 if one said accept and the other said reject -- causing us to
4008 not always publish a new descriptor since we thought nothing
4010 - Retry pending server downloads as well as pending networkstatus
4011 downloads when we unexpectedly get a socks request.
4012 - We were ignoring the IS_FAST flag in the directory status,
4013 meaning we were willing to pick trivial-bandwidth nodes for "fast"
4015 - If the controller's SAVECONF command fails (e.g. due to file
4016 permissions), let the controller know that it failed.
4019 - If we're trying to be a Tor server and running Windows 95/98/ME
4020 as a server, explain that we'll likely crash.
4021 - When we're a server, a client asks for an old-style directory,
4022 and our write bucket is empty, don't give it to him. This way
4023 small servers can continue to serve the directory *sometimes*,
4024 without getting overloaded.
4025 - Compress exit policies even more -- look for duplicate lines
4027 - Clients now honor the "guard" flag in the router status when
4028 picking entry guards, rather than looking at is_fast or is_stable.
4029 - Retain unrecognized lines in $DATADIR/state file, so that we can
4030 be forward-compatible.
4031 - Generate 18.0.0.0/8 address policy format in descs when we can;
4032 warn when the mask is not reducible to a bit-prefix.
4033 - Let the user set ControlListenAddress in the torrc. This can be
4034 dangerous, but there are some cases (like a secured LAN) where it
4036 - Split ReachableAddresses into ReachableDirAddresses and
4037 ReachableORAddresses, so we can restrict Dir conns to port 80
4038 and OR conns to port 443.
4039 - Now we can target arch and OS in rpm builds (contributed by
4040 Phobos). Also make the resulting dist-rpm filename match the
4042 - New config options to help controllers: FetchServerDescriptors
4043 and FetchHidServDescriptors for whether to fetch server
4044 info and hidserv info or let the controller do it, and
4045 PublishServerDescriptor and PublishHidServDescriptors.
4046 - Also let the controller set the __AllDirActionsPrivate config
4047 option if you want all directory fetches/publishes to happen via
4048 Tor (it assumes your controller bootstraps your circuits).
4051 Changes in version 0.1.0.17 - 2006-02-17
4052 o Crash bugfixes on 0.1.0.x:
4053 - When servers with a non-zero DirPort came out of hibernation,
4054 sometimes they would trigger an assert.
4056 o Other important bugfixes:
4057 - On platforms that don't have getrlimit (like Windows), we were
4058 artificially constraining ourselves to a max of 1024
4059 connections. Now just assume that we can handle as many as 15000
4060 connections. Hopefully this won't cause other problems.
4062 o Backported features:
4063 - When we're a server, a client asks for an old-style directory,
4064 and our write bucket is empty, don't give it to him. This way
4065 small servers can continue to serve the directory *sometimes*,
4066 without getting overloaded.
4067 - Whenever you get a 503 in response to a directory fetch, try
4068 once more. This will become important once servers start sending
4069 503's whenever they feel busy.
4070 - Fetch a new directory every 120 minutes, not every 40 minutes.
4071 Now that we have hundreds of thousands of users running the old
4072 directory algorithm, it's starting to hurt a lot.
4073 - Bump up the period for forcing a hidden service descriptor upload
4074 from 20 minutes to 1 hour.
4077 Changes in version 0.1.1.13-alpha - 2006-02-09
4078 o Crashes in 0.1.1.x:
4079 - When you tried to setconf ORPort via the controller, Tor would
4080 crash. So people using TorCP to become a server were sad.
4081 - Solve (I hope) the stack-smashing bug that we were seeing on fast
4082 servers. The problem appears to be something do with OpenSSL's
4083 random number generation, or how we call it, or something. Let me
4084 know if the crashes continue.
4085 - Turn crypto hardware acceleration off by default, until we find
4086 somebody smart who can test it for us. (It appears to produce
4087 seg faults in at least some cases.)
4088 - Fix a rare assert error when we've tried all intro points for
4089 a hidden service and we try fetching the service descriptor again:
4090 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
4093 - Fix a major load balance bug: we were round-robining in 16 KB
4094 chunks, and servers with bandwidthrate of 20 KB, while downloading
4095 a 600 KB directory, would starve their other connections. Now we
4096 try to be a bit more fair.
4097 - Dir authorities and mirrors were never expiring the newest
4098 descriptor for each server, causing memory and directory bloat.
4099 - Fix memory-bloating and connection-bloating bug on servers: We
4100 were never closing any connection that had ever had a circuit on
4101 it, because we were checking conn->n_circuits == 0, yet we had a
4102 bug that let it go negative.
4103 - Make Tor work using squid as your http proxy again -- squid
4104 returns an error if you ask for a URL that's too long, and it uses
4105 a really generic error message. Plus, many people are behind a
4106 transparent squid so they don't even realize it.
4107 - On platforms that don't have getrlimit (like Windows), we were
4108 artificially constraining ourselves to a max of 1024
4109 connections. Now just assume that we can handle as many as 15000
4110 connections. Hopefully this won't cause other problems.
4111 - Add a new config option ExitPolicyRejectPrivate which defaults to
4112 1. This means all exit policies will begin with rejecting private
4113 addresses, unless the server operator explicitly turns it off.
4116 - Clients no longer download descriptors for non-running
4118 - Before we add new directory authorities, we should make it
4119 clear that only v1 authorities should receive/publish hidden
4120 service descriptors.
4123 - As soon as we've fetched some more directory info, immediately
4124 try to download more server descriptors. This way we don't have
4125 a 10 second pause during initial bootstrapping.
4126 - Remove even more loud log messages that the server operator can't
4128 - When we're running an obsolete or un-recommended version, make
4129 the log message more clear about what the problem is and what
4130 versions *are* still recommended.
4131 - Provide a more useful warn message when our onion queue gets full:
4132 the CPU is too slow or the exit policy is too liberal.
4133 - Don't warn when we receive a 503 from a dirserver/cache -- this
4134 will pave the way for them being able to refuse if they're busy.
4135 - When we fail to bind a listener, try to provide a more useful
4136 log message: e.g., "Is Tor already running?"
4137 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
4138 Goldberg can prove things about our handshake protocol more
4140 - MaxConn has been obsolete for a while now. Document the ConnLimit
4141 config option, which is a *minimum* number of file descriptors
4142 that must be available else Tor refuses to start.
4143 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
4144 if you log to syslog and want something other than LOG_DAEMON.
4145 - Make dirservers generate a separate "guard" flag to mean,
4146 "would make a good entry guard". Make clients parse it and vote
4147 on it. Not used by clients yet.
4148 - Implement --with-libevent-dir option to ./configure. Also, improve
4149 search techniques to find libevent, and use those for openssl too.
4150 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
4151 - Only start testing reachability once we've established a
4152 circuit. This will make startup on dirservers less noisy.
4153 - Don't try to upload hidden service descriptors until we have
4154 established a circuit.
4155 - Fix the controller's "attachstream 0" command to treat conn like
4156 it just connected, doing address remapping, handling .exit and
4157 .onion idioms, and so on. Now we're more uniform in making sure
4158 that the controller hears about new and closing connections.
4161 Changes in version 0.1.1.12-alpha - 2006-01-11
4162 o Bugfixes on 0.1.1.x:
4163 - The fix to close duplicate server connections was closing all
4164 Tor client connections if they didn't establish a circuit
4165 quickly enough. Oops.
4166 - Fix minor memory issue (double-free) that happened on exit.
4168 o Bugfixes on 0.1.0.x:
4169 - Tor didn't warn when it failed to open a log file.
4172 Changes in version 0.1.1.11-alpha - 2006-01-10
4173 o Crashes in 0.1.1.x:
4174 - Include all the assert/crash fixes from 0.1.0.16.
4175 - If you start Tor and then quit very quickly, there were some
4176 races that tried to free things that weren't allocated yet.
4177 - Fix a rare memory stomp if you're running hidden services.
4178 - Fix segfault when specifying DirServer in config without nickname.
4179 - Fix a seg fault when you finish connecting to a server but at
4180 that moment you dump his server descriptor.
4181 - Extendcircuit and Attachstream controller commands would
4182 assert/crash if you don't give them enough arguments.
4183 - Fix an assert error when we're out of space in the connection_list
4184 and we try to post a hidden service descriptor (reported by weasel).
4185 - If you specify a relative torrc path and you set RunAsDaemon in
4186 your torrc, then it chdir()'s to the new directory. If you HUP,
4187 it tries to load the new torrc location, fails, and exits.
4188 The fix: no longer allow a relative path to torrc using -f.
4191 - Implement "entry guards": automatically choose a handful of entry
4192 nodes and stick with them for all circuits. Only pick new guards
4193 when the ones you have are unsuitable, and if the old guards
4194 become suitable again, switch back. This will increase security
4195 dramatically against certain end-point attacks. The EntryNodes
4196 config option now provides some hints about which entry guards you
4197 want to use most; and StrictEntryNodes means to only use those.
4198 - New directory logic: download by descriptor digest, not by
4199 fingerprint. Caches try to download all listed digests from
4200 authorities; clients try to download "best" digests from caches.
4201 This avoids partitioning and isolating attacks better.
4202 - Make the "stable" router flag in network-status be the median of
4203 the uptimes of running valid servers, and make clients pay
4204 attention to the network-status flags. Thus the cutoff adapts
4205 to the stability of the network as a whole, making IRC, IM, etc
4206 connections more reliable.
4209 - Tor servers with dynamic IP addresses were needing to wait 18
4210 hours before they could start doing reachability testing using
4211 the new IP address and ports. This is because they were using
4212 the internal descriptor to learn what to test, yet they were only
4213 rebuilding the descriptor once they decided they were reachable.
4214 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
4215 to download certain server descriptors, throw them away, and then
4216 fetch them again after 30 minutes. Now mirrors throw away these
4217 server descriptors so clients can't get them.
4218 - We were leaving duplicate connections to other ORs open for a week,
4219 rather than closing them once we detect a duplicate. This only
4220 really affected authdirservers, but it affected them a lot.
4221 - Spread the authdirservers' reachability testing over the entire
4222 testing interval, so we don't try to do 500 TLS's at once every
4226 - If the network is down, and we try to connect to a conn because
4227 we have a circuit in mind, and we timeout (30 seconds) because the
4228 network never answers, we were expiring the circuit, but we weren't
4229 obsoleting the connection or telling the entry_guards functions.
4230 - Some Tor servers process billions of cells per day. These statistics
4231 need to be uint64_t's.
4232 - Check for integer overflows in more places, when adding elements
4233 to smartlists. This could possibly prevent a buffer overflow
4234 on malicious huge inputs. I don't see any, but I haven't looked
4236 - ReachableAddresses kept growing new "reject *:*" lines on every
4238 - When you "setconf log" via the controller, it should remove all
4239 logs. We were automatically adding back in a "log notice stdout".
4240 - Newly bootstrapped Tor networks couldn't establish hidden service
4241 circuits until they had nodes with high uptime. Be more tolerant.
4242 - We were marking servers down when they could not answer every piece
4243 of the directory request we sent them. This was far too harsh.
4244 - Fix the torify (tsocks) config file to not use Tor for localhost
4246 - Directory authorities now go to the proper authority when asking for
4247 a networkstatus, even when they want a compressed one.
4248 - Fix a harmless bug that was causing Tor servers to log
4249 "Got an end because of misc error, but we're not an AP. Closing."
4250 - Authorities were treating their own descriptor changes as cosmetic,
4251 meaning the descriptor available in the network-status and the
4252 descriptor that clients downloaded were different.
4253 - The OS X installer was adding a symlink for tor_resolve but
4254 the binary was called tor-resolve (reported by Thomas Hardly).
4255 - Workaround a problem with some http proxies where they refuse GET
4256 requests that specify "Content-Length: 0" (reported by Adrian).
4257 - Fix wrong log message when you add a "HiddenServiceNodes" config
4258 line without any HiddenServiceDir line (reported by Chris Thomas).
4261 - Write the TorVersion into the state file so we have a prayer of
4262 keeping forward and backward compatibility.
4263 - Revive the FascistFirewall config option rather than eliminating it:
4264 now it's a synonym for ReachableAddresses *:80,*:443.
4265 - Clients choose directory servers from the network status lists,
4266 not from their internal list of router descriptors. Now they can
4267 go to caches directly rather than needing to go to authorities
4269 - Directory authorities ignore router descriptors that have only
4270 cosmetic differences: do this for 0.1.0.x servers now too.
4271 - Add a new flag to network-status indicating whether the server
4272 can answer v2 directory requests too.
4273 - Authdirs now stop whining so loudly about bad descriptors that
4274 they fetch from other dirservers. So when there's a log complaint,
4275 it's for sure from a freshly uploaded descriptor.
4276 - Reduce memory requirements in our structs by changing the order
4278 - There used to be two ways to specify your listening ports in a
4279 server descriptor: on the "router" line and with a separate "ports"
4280 line. Remove support for the "ports" line.
4281 - New config option "AuthDirRejectUnlisted" for auth dirservers as
4282 a panic button: if we get flooded with unusable servers we can
4283 revert to only listing servers in the approved-routers file.
4284 - Auth dir servers can now mark a fingerprint as "!reject" or
4285 "!invalid" in the approved-routers file (as its nickname), to
4286 refuse descriptors outright or include them but marked as invalid.
4287 - Servers store bandwidth history across restarts/crashes.
4288 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
4289 get a better idea of why their circuits failed. Not used yet.
4290 - Directory mirrors now cache up to 16 unrecognized network-status
4291 docs. Now we can add new authdirservers and they'll be cached too.
4292 - When picking a random directory, prefer non-authorities if any
4294 - New controller option "getinfo desc/all-recent" to fetch the
4295 latest server descriptor for every router that Tor knows about.
4298 Changes in version 0.1.0.16 - 2006-01-02
4299 o Crash bugfixes on 0.1.0.x:
4300 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
4301 corrupting the heap, losing FDs, or crashing when we need to resize
4302 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
4303 - It turns out sparc64 platforms crash on unaligned memory access
4304 too -- so detect and avoid this.
4305 - Handle truncated compressed data correctly (by detecting it and
4307 - Fix possible-but-unlikely free(NULL) in control.c.
4308 - When we were closing connections, there was a rare case that
4309 stomped on memory, triggering seg faults and asserts.
4310 - Avoid potential infinite recursion when building a descriptor. (We
4311 don't know that it ever happened, but better to fix it anyway.)
4312 - We were neglecting to unlink marked circuits from soon-to-close OR
4313 connections, which caused some rare scribbling on freed memory.
4314 - Fix a memory stomping race bug when closing the joining point of two
4315 rendezvous circuits.
4316 - Fix an assert in time parsing found by Steven Murdoch.
4318 o Other bugfixes on 0.1.0.x:
4319 - When we're doing reachability testing, provide more useful log
4320 messages so the operator knows what to expect.
4321 - Do not check whether DirPort is reachable when we are suppressing
4322 advertising it because of hibernation.
4323 - When building with -static or on Solaris, we sometimes needed -ldl.
4324 - When we're deciding whether a stream has enough circuits around
4325 that can handle it, count the freshly dirty ones and not the ones
4326 that are so dirty they won't be able to handle it.
4327 - When we're expiring old circuits, we had a logic error that caused
4328 us to close new rendezvous circuits rather than old ones.
4329 - Give a more helpful log message when you try to change ORPort via
4330 the controller: you should upgrade Tor if you want that to work.
4331 - We were failing to parse Tor versions that start with "Tor ".
4332 - Tolerate faulty streams better: when a stream fails for reason
4333 exitpolicy, stop assuming that the router is lying about his exit
4334 policy. When a stream fails for reason misc, allow it to retry just
4335 as if it was resolvefailed. When a stream has failed three times,
4336 reset its failure count so we can try again and get all three tries.
4339 Changes in version 0.1.1.10-alpha - 2005-12-11
4340 o Correctness bugfixes on 0.1.0.x:
4341 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
4342 corrupting the heap, losing FDs, or crashing when we need to resize
4343 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
4344 - Stop doing the complex voodoo overkill checking for insecure
4345 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
4346 - When we were closing connections, there was a rare case that
4347 stomped on memory, triggering seg faults and asserts.
4348 - We were neglecting to unlink marked circuits from soon-to-close OR
4349 connections, which caused some rare scribbling on freed memory.
4350 - When we're deciding whether a stream has enough circuits around
4351 that can handle it, count the freshly dirty ones and not the ones
4352 that are so dirty they won't be able to handle it.
4353 - Recover better from TCP connections to Tor servers that are
4354 broken but don't tell you (it happens!); and rotate TLS
4355 connections once a week.
4356 - When we're expiring old circuits, we had a logic error that caused
4357 us to close new rendezvous circuits rather than old ones.
4358 - Fix a scary-looking but apparently harmless bug where circuits
4359 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
4360 servers, and never switch to state CIRCUIT_STATE_OPEN.
4361 - When building with -static or on Solaris, we sometimes needed to
4363 - Give a useful message when people run Tor as the wrong user,
4364 rather than telling them to start chowning random directories.
4365 - We were failing to inform the controller about new .onion streams.
4367 o Security bugfixes on 0.1.0.x:
4368 - Refuse server descriptors if the fingerprint line doesn't match
4369 the included identity key. Tor doesn't care, but other apps (and
4370 humans) might actually be trusting the fingerprint line.
4371 - We used to kill the circuit when we receive a relay command we
4372 don't recognize. Now we just drop it.
4373 - Start obeying our firewall options more rigorously:
4374 . If we can't get to a dirserver directly, try going via Tor.
4375 . Don't ever try to connect (as a client) to a place our
4376 firewall options forbid.
4377 . If we specify a proxy and also firewall options, obey the
4378 firewall options even when we're using the proxy: some proxies
4379 can only proxy to certain destinations.
4380 - Fix a bug found by Lasse Overlier: when we were making internal
4381 circuits (intended to be cannibalized later for rendezvous and
4382 introduction circuits), we were picking them so that they had
4383 useful exit nodes. There was no need for this, and it actually
4384 aids some statistical attacks.
4385 - Start treating internal circuits and exit circuits separately.
4386 It's important to keep them separate because internal circuits
4387 have their last hops picked like middle hops, rather than like
4388 exit hops. So exiting on them will break the user's expectations.
4390 o Bugfixes on 0.1.1.x:
4391 - Take out the mis-feature where we tried to detect IP address
4392 flapping for people with DynDNS, and chose not to upload a new
4393 server descriptor sometimes.
4394 - Try to be compatible with OpenSSL 0.9.6 again.
4395 - Log fix: when the controller is logging about .onion addresses,
4396 sometimes it didn't include the ".onion" part of the address.
4397 - Don't try to modify options->DirServers internally -- if the
4398 user didn't specify any, just add the default ones directly to
4399 the trusted dirserver list. This fixes a bug where people running
4400 controllers would use SETCONF on some totally unrelated config
4401 option, and Tor would start yelling at them about changing their
4403 - Let the controller's redirectstream command specify a port, in
4404 case the controller wants to change that too.
4405 - When we requested a pile of server descriptors, we sometimes
4406 accidentally launched a duplicate request for the first one.
4407 - Bugfix for trackhostexits: write down the fingerprint of the
4408 chosen exit, not its nickname, because the chosen exit might not
4410 - When parsing foo.exit, if foo is unknown, and we are leaving
4411 circuits unattached, set the chosen_exit field and leave the
4412 address empty. This matters because controllers got confused
4414 - Directory authorities no longer try to download server
4415 descriptors that they know they will reject.
4417 o Features and updates:
4418 - Replace balanced trees with hash tables: this should make stuff
4419 significantly faster.
4420 - Resume using the AES counter-mode implementation that we ship,
4421 rather than OpenSSL's. Ours is significantly faster.
4422 - Many other CPU and memory improvements.
4423 - Add a new config option FastFirstHopPK (on by default) so clients
4424 do a trivial crypto handshake for their first hop, since TLS has
4425 already taken care of confidentiality and authentication.
4426 - Add a new config option TestSocks so people can see if their
4427 applications are using socks4, socks4a, socks5-with-ip, or
4428 socks5-with-hostname. This way they don't have to keep mucking
4429 with tcpdump and wondering if something got cached somewhere.
4430 - Warn when listening on a public address for socks. I suspect a
4431 lot of people are setting themselves up as open socks proxies,
4432 and they have no idea that jerks on the Internet are using them,
4433 since they simply proxy the traffic into the Tor network.
4434 - Add "private:*" as an alias in configuration for policies. Now
4435 you can simplify your exit policy rather than needing to list
4436 every single internal or nonroutable network space.
4437 - Add a new controller event type that allows controllers to get
4438 all server descriptors that were uploaded to a router in its role
4439 as authoritative dirserver.
4440 - Start shipping socks-extensions.txt, tor-doc-unix.html,
4441 tor-doc-server.html, and stylesheet.css in the tarball.
4442 - Stop shipping tor-doc.html in the tarball.
4445 Changes in version 0.1.1.9-alpha - 2005-11-15
4446 o Usability improvements:
4447 - Start calling it FooListenAddress rather than FooBindAddress,
4448 since few of our users know what it means to bind an address
4450 - Reduce clutter in server logs. We're going to try to make
4451 them actually usable now. New config option ProtocolWarnings that
4452 lets you hear about how _other Tors_ are breaking the protocol. Off
4454 - Divide log messages into logging domains. Once we put some sort
4455 of interface on this, it will let people looking at more verbose
4456 log levels specify the topics they want to hear more about.
4457 - Make directory servers return better http 404 error messages
4458 instead of a generic "Servers unavailable".
4459 - Check for even more Windows version flags when writing the platform
4460 string in server descriptors, and note any we don't recognize.
4461 - Clean up more of the OpenSSL memory when exiting, so we can detect
4462 memory leaks better.
4463 - Make directory authorities be non-versioning, non-naming by
4464 default. Now we can add new directory servers without requiring
4465 their operators to pay close attention.
4466 - When logging via syslog, include the pid whenever we provide
4467 a log entry. Suggested by Todd Fries.
4469 o Performance improvements:
4470 - Directory servers now silently throw away new descriptors that
4471 haven't changed much if the timestamps are similar. We do this to
4472 tolerate older Tor servers that upload a new descriptor every 15
4473 minutes. (It seemed like a good idea at the time.)
4474 - Inline bottleneck smartlist functions; use fast versions by default.
4475 - Add a "Map from digest to void*" abstraction digestmap_t so we
4476 can do less hex encoding/decoding. Use it in router_get_by_digest()
4477 to resolve a performance bottleneck.
4478 - Allow tor_gzip_uncompress to extract as much as possible from
4479 truncated compressed data. Try to extract as many
4480 descriptors as possible from truncated http responses (when
4481 DIR_PURPOSE_FETCH_ROUTERDESC).
4482 - Make circ->onionskin a pointer, not a static array. moria2 was using
4483 125000 circuit_t's after it had been up for a few weeks, which
4484 translates to 20+ megs of wasted space.
4485 - The private half of our EDH handshake keys are now chosen out
4486 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
4488 o Security improvements:
4489 - Start making directory caches retain old routerinfos, so soon
4490 clients can start asking by digest of descriptor rather than by
4491 fingerprint of server.
4492 - Add half our entropy from RAND_poll in OpenSSL. This knows how
4493 to use egd (if present), openbsd weirdness (if present), vms/os2
4494 weirdness (if we ever port there), and more in the future.
4496 o Bugfixes on 0.1.0.x:
4497 - Do round-robin writes of at most 16 kB per write. This might be
4498 more fair on loaded Tor servers, and it might resolve our Windows
4499 crash bug. It might also slow things down.
4500 - Our TLS handshakes were generating a single public/private
4501 keypair for the TLS context, rather than making a new one for
4502 each new connections. Oops. (But we were still rotating them
4503 periodically, so it's not so bad.)
4504 - When we were cannibalizing a circuit with a particular exit
4505 node in mind, we weren't checking to see if that exit node was
4506 already present earlier in the circuit. Oops.
4507 - When a Tor server's IP changes (e.g. from a dyndns address),
4508 upload a new descriptor so clients will learn too.
4509 - Really busy servers were keeping enough circuits open on stable
4510 connections that they were wrapping around the circuit_id
4511 space. (It's only two bytes.) This exposed a bug where we would
4512 feel free to reuse a circuit_id even if it still exists but has
4513 been marked for close. Try to fix this bug. Some bug remains.
4514 - If we would close a stream early (e.g. it asks for a .exit that
4515 we know would refuse it) but the LeaveStreamsUnattached config
4516 option is set by the controller, then don't close it.
4518 o Bugfixes on 0.1.1.8-alpha:
4519 - Fix a big pile of memory leaks, some of them serious.
4520 - Do not try to download a routerdesc if we would immediately reject
4522 - Resume inserting a newline between all router descriptors when
4523 generating (old style) signed directories, since our spec says
4525 - When providing content-type application/octet-stream for
4526 server descriptors using .z, we were leaving out the
4527 content-encoding header. Oops. (Everything tolerated this just
4528 fine, but that doesn't mean we need to be part of the problem.)
4529 - Fix a potential seg fault in getconf and getinfo using version 1
4530 of the controller protocol.
4531 - Avoid crash: do not check whether DirPort is reachable when we
4532 are suppressing it because of hibernation.
4533 - Make --hash-password not crash on exit.
4536 Changes in version 0.1.1.8-alpha - 2005-10-07
4537 o New features (major):
4538 - Clients don't download or use the directory anymore. Now they
4539 download and use network-statuses from the trusted dirservers,
4540 and fetch individual server descriptors as needed from mirrors.
4541 See dir-spec.txt for all the gory details.
4542 - Be more conservative about whether to advertise our DirPort.
4543 The main change is to not advertise if we're running at capacity
4544 and either a) we could hibernate or b) our capacity is low and
4545 we're using a default DirPort.
4546 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
4548 o New features (minor):
4549 - Try to be smart about when to retry network-status and
4550 server-descriptor fetches. Still needs some tuning.
4551 - Stop parsing, storing, or using running-routers output (but
4552 mirrors still cache and serve it).
4553 - Consider a threshold of versioning dirservers (dirservers who have
4554 an opinion about which Tor versions are still recommended) before
4555 deciding whether to warn the user that he's obsolete.
4556 - Dirservers can now reject/invalidate by key and IP, with the
4557 config options "AuthDirInvalid" and "AuthDirReject". This is
4558 useful since currently we automatically list servers as running
4559 and usable even if we know they're jerks.
4560 - Provide dire warnings to any users who set DirServer; move it out
4561 of torrc.sample and into torrc.complete.
4562 - Add MyFamily to torrc.sample in the server section.
4563 - Add nicknames to the DirServer line, so we can refer to them
4564 without requiring all our users to memorize their IP addresses.
4565 - When we get an EOF or a timeout on a directory connection, note
4566 how many bytes of serverdesc we are dropping. This will help
4567 us determine whether it is smart to parse incomplete serverdesc
4569 - Add a new function to "change pseudonyms" -- that is, to stop
4570 using any currently-dirty circuits for new streams, so we don't
4571 link new actions to old actions. Currently it's only called on
4572 HUP (or SIGNAL RELOAD).
4573 - On sighup, if UseHelperNodes changed to 1, use new circuits.
4574 - Start using RAND_bytes rather than RAND_pseudo_bytes from
4575 OpenSSL. Also, reseed our entropy every hour, not just at
4576 startup. And entropy in 512-bit chunks, not 160-bit chunks.
4578 o Fixes on 0.1.1.7-alpha:
4579 - Nobody ever implemented EVENT_ADDRMAP for control protocol
4580 version 0, so don't let version 0 controllers ask for it.
4581 - If you requested something with too many newlines via the
4582 v1 controller protocol, you could crash tor.
4583 - Fix a number of memory leaks, including some pretty serious ones.
4584 - Re-enable DirPort testing again, so Tor servers will be willing
4585 to advertise their DirPort if it's reachable.
4586 - On TLS handshake, only check the other router's nickname against
4587 its expected nickname if is_named is set.
4589 o Fixes forward-ported from 0.1.0.15:
4590 - Don't crash when we don't have any spare file descriptors and we
4591 try to spawn a dns or cpu worker.
4592 - Make the numbers in read-history and write-history into uint64s,
4593 so they don't overflow and publish negatives in the descriptor.
4596 - For the OS X package's modified privoxy config file, comment
4597 out the "logfile" line so we don't log everything passed
4599 - We were whining about using socks4 or socks5-with-local-lookup
4600 even when it's an IP in the "virtual" range we designed exactly
4602 - We were leaking some memory every time the client changes IPs.
4603 - Never call free() on tor_malloc()d memory. This will help us
4604 use dmalloc to detect memory leaks.
4605 - Check for named servers when looking them up by nickname;
4606 warn when we'recalling a non-named server by its nickname;
4607 don't warn twice about the same name.
4608 - Try to list MyFamily elements by key, not by nickname, and warn
4609 if we've not heard of the server.
4610 - Make windows platform detection (uname equivalent) smarter.
4611 - It turns out sparc64 doesn't like unaligned access either.
4614 Changes in version 0.1.0.15 - 2005-09-23
4615 o Bugfixes on 0.1.0.x:
4616 - Reject ports 465 and 587 (spam targets) in default exit policy.
4617 - Don't crash when we don't have any spare file descriptors and we
4618 try to spawn a dns or cpu worker.
4619 - Get rid of IgnoreVersion undocumented config option, and make us
4620 only warn, never exit, when we're running an obsolete version.
4621 - Don't try to print a null string when your server finds itself to
4622 be unreachable and the Address config option is empty.
4623 - Make the numbers in read-history and write-history into uint64s,
4624 so they don't overflow and publish negatives in the descriptor.
4625 - Fix a minor memory leak in smartlist_string_remove().
4626 - We were only allowing ourselves to upload a server descriptor at
4627 most every 20 minutes, even if it changed earlier than that.
4628 - Clean up log entries that pointed to old URLs.
4631 Changes in version 0.1.1.7-alpha - 2005-09-14
4632 o Fixes on 0.1.1.6-alpha:
4633 - Exit servers were crashing when people asked them to make a
4634 connection to an address not in their exit policy.
4635 - Looking up a non-existent stream for a v1 control connection would
4637 - Fix a seg fault if we ask a dirserver for a descriptor by
4638 fingerprint but he doesn't know about him.
4639 - SETCONF was appending items to linelists, not clearing them.
4640 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
4641 out and refuse the setconf if it would fail.
4642 - Downgrade the dirserver log messages when whining about
4646 - Add Peter Palfrader's check-tor script to tor/contrib/
4647 It lets you easily check whether a given server (referenced by
4648 nickname) is reachable by you.
4649 - Numerous changes to move towards client-side v2 directories. Not
4653 - If the user gave tor an odd number of command-line arguments,
4654 we were silently ignoring the last one. Now we complain and fail.
4655 [This wins the oldest-bug prize -- this bug has been present since
4656 November 2002, as released in Tor 0.0.0.]
4657 - Do not use unaligned memory access on alpha, mips, or mipsel.
4658 It *works*, but is very slow, so we treat them as if it doesn't.
4659 - Retry directory requests if we fail to get an answer we like
4660 from a given dirserver (we were retrying before, but only if
4661 we fail to connect).
4662 - When writing the RecommendedVersions line, sort them first.
4663 - When the client asked for a rendezvous port that the hidden
4664 service didn't want to provide, we were sending an IP address
4665 back along with the end cell. Fortunately, it was zero. But stop
4667 - Correct "your server is reachable" log entries to indicate that
4668 it was self-testing that told us so.
4671 Changes in version 0.1.1.6-alpha - 2005-09-09
4672 o Fixes on 0.1.1.5-alpha:
4673 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
4674 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
4675 - Fix bug with tor_memmem finding a match at the end of the string.
4676 - Make unit tests run without segfaulting.
4677 - Resolve some solaris x86 compile warnings.
4678 - Handle duplicate lines in approved-routers files without warning.
4679 - Fix bug where as soon as a server refused any requests due to his
4680 exit policy (e.g. when we ask for localhost and he tells us that's
4681 127.0.0.1 and he won't do it), we decided he wasn't obeying his
4682 exit policy using him for any exits.
4683 - Only do openssl hardware accelerator stuff if openssl version is
4686 o New controller features/fixes:
4687 - Add a "RESETCONF" command so you can set config options like
4688 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
4689 a config option in the torrc with no value, then it clears it
4690 entirely (rather than setting it to its default).
4691 - Add a "GETINFO config-file" to tell us where torrc is.
4692 - Avoid sending blank lines when GETINFO replies should be empty.
4693 - Add a QUIT command for the controller (for using it manually).
4694 - Fix a bug in SAVECONF that was adding default dirservers and
4695 other redundant entries to the torrc file.
4697 o Start on the new directory design:
4698 - Generate, publish, cache, serve new network-status format.
4699 - Publish individual descriptors (by fingerprint, by "all", and by
4701 - Publish client and server recommended versions separately.
4702 - Allow tor_gzip_uncompress() to handle multiple concatenated
4703 compressed strings. Serve compressed groups of router
4704 descriptors. The compression logic here could be more
4706 - Distinguish v1 authorities (all currently trusted directories)
4707 from v2 authorities (all trusted directories).
4708 - Change DirServers config line to note which dirs are v1 authorities.
4709 - Add configuration option "V1AuthoritativeDirectory 1" which
4710 moria1, moria2, and tor26 should set.
4711 - Remove option when getting directory cache to see whether they
4712 support running-routers; they all do now. Replace it with one
4713 to see whether caches support v2 stuff.
4716 - Dirservers now do their own external reachability testing of each
4717 Tor server, and only list them as running if they've been found to
4718 be reachable. We also send back warnings to the server's logs if
4719 it uploads a descriptor that we already believe is unreachable.
4720 - Implement exit enclaves: if we know an IP address for the
4721 destination, and there's a running Tor server at that address
4722 which allows exit to the destination, then extend the circuit to
4723 that exit first. This provides end-to-end encryption and end-to-end
4724 authentication. Also, if the user wants a .exit address or enclave,
4725 use 4 hops rather than 3, and cannibalize a general circ for it
4727 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
4728 controller. Also, rotate dns and cpu workers if the controller
4729 changes options that will affect them; and initialize the dns
4730 worker cache tree whether or not we start out as a server.
4731 - Only upload a new server descriptor when options change, 18
4732 hours have passed, uptime is reset, or bandwidth changes a lot.
4733 - Check [X-]Forwarded-For headers in HTTP requests when generating
4734 log messages. This lets people run dirservers (and caches) behind
4735 Apache but still know which IP addresses are causing warnings.
4737 o Config option changes:
4738 - Replace (Fascist)Firewall* config options with a new
4739 ReachableAddresses option that understands address policies.
4740 For example, "ReachableAddresses *:80,*:443"
4741 - Get rid of IgnoreVersion undocumented config option, and make us
4742 only warn, never exit, when we're running an obsolete version.
4743 - Make MonthlyAccountingStart config option truly obsolete now.
4746 - Reject ports 465 and 587 in the default exit policy, since
4747 people have started using them for spam too.
4748 - It turns out we couldn't bootstrap a network since we added
4749 reachability detection in 0.1.0.1-rc. Good thing the Tor network
4750 has never gone down. Add an AssumeReachable config option to let
4751 servers and dirservers bootstrap. When we're trying to build a
4752 high-uptime or high-bandwidth circuit but there aren't enough
4753 suitable servers, try being less picky rather than simply failing.
4754 - Our logic to decide if the OR we connected to was the right guy
4755 was brittle and maybe open to a mitm for unverified routers.
4756 - We weren't cannibalizing circuits correctly for
4757 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
4758 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
4759 build those from scratch. This should make hidden services faster.
4760 - Predict required circuits better, with an eye toward making hidden
4761 services faster on the service end.
4762 - Retry streams if the exit node sends back a 'misc' failure. This
4763 should result in fewer random failures. Also, after failing
4764 from resolve failed or misc, reset the num failures, so we give
4765 it a fair shake next time we try.
4766 - Clean up the rendezvous warn log msgs, and downgrade some to info.
4767 - Reduce severity on logs about dns worker spawning and culling.
4768 - When we're shutting down and we do something like try to post a
4769 server descriptor or rendezvous descriptor, don't complain that
4770 we seem to be unreachable. Of course we are, we're shutting down.
4771 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
4772 We don't use them yet, but maybe one day our DNS resolver will be
4773 able to discover them.
4774 - Make ContactInfo mandatory for authoritative directory servers.
4775 - Require server descriptors to list IPv4 addresses -- hostnames
4776 are no longer allowed. This also fixes some potential security
4777 problems with people providing hostnames as their address and then
4778 preferentially resolving them to partition users.
4779 - Change log line for unreachability to explicitly suggest /etc/hosts
4780 as the culprit. Also make it clearer what IP address and ports we're
4781 testing for reachability.
4782 - Put quotes around user-supplied strings when logging so users are
4783 more likely to realize if they add bad characters (like quotes)
4785 - Let auth dir servers start without specifying an Address config
4787 - Make unit tests (and other invocations that aren't the real Tor)
4788 run without launching listeners, creating subdirectories, and so on.
4791 Changes in version 0.1.1.5-alpha - 2005-08-08
4792 o Bugfixes included in 0.1.0.14.
4794 o Bugfixes on 0.1.0.x:
4795 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
4796 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
4797 it would silently using ignore the 6668.
4800 Changes in version 0.1.0.14 - 2005-08-08
4801 o Bugfixes on 0.1.0.x:
4802 - Fix the other half of the bug with crypto handshakes
4804 - Fix an assert trigger if you send a 'signal term' via the
4805 controller when it's listening for 'event info' messages.
4808 Changes in version 0.1.1.4-alpha - 2005-08-04
4809 o Bugfixes included in 0.1.0.13.
4812 - Improve tor_gettimeofday() granularity on windows.
4813 - Make clients regenerate their keys when their IP address changes.
4814 - Implement some more GETINFO goodness: expose helper nodes, config
4815 options, getinfo keys.
4818 Changes in version 0.1.0.13 - 2005-08-04
4819 o Bugfixes on 0.1.0.x:
4820 - Fix a critical bug in the security of our crypto handshakes.
4821 - Fix a size_t underflow in smartlist_join_strings2() that made
4822 it do bad things when you hand it an empty smartlist.
4823 - Fix Windows installer to ship Tor license (thanks to Aphex for
4824 pointing out this oversight) and put a link to the doc directory
4826 - Explicitly set no-unaligned-access for sparc: it turns out the
4827 new gcc's let you compile broken code, but that doesn't make it
4831 Changes in version 0.1.1.3-alpha - 2005-07-23
4832 o Bugfixes on 0.1.1.2-alpha:
4833 - Fix a bug in handling the controller's "post descriptor"
4835 - Fix several bugs in handling the controller's "extend circuit"
4837 - Fix a bug in handling the controller's "stream status" event.
4838 - Fix an assert failure if we have a controller listening for
4839 circuit events and we go offline.
4840 - Re-allow hidden service descriptors to publish 0 intro points.
4841 - Fix a crash when generating your hidden service descriptor if
4842 you don't have enough intro points already.
4844 o New features on 0.1.1.2-alpha:
4845 - New controller function "getinfo accounting", to ask how
4846 many bytes we've used in this time period.
4847 - Experimental support for helper nodes: a lot of the risk from
4848 a small static adversary comes because users pick new random
4849 nodes every time they rebuild a circuit. Now users will try to
4850 stick to the same small set of entry nodes if they can. Not
4851 enabled by default yet.
4853 o Bugfixes on 0.1.0.12:
4854 - If you're an auth dir server, always publish your dirport,
4855 even if you haven't yet found yourself to be reachable.
4856 - Fix a size_t underflow in smartlist_join_strings2() that made
4857 it do bad things when you hand it an empty smartlist.
4860 Changes in version 0.1.0.12 - 2005-07-18
4861 o New directory servers:
4862 - tor26 has changed IP address.
4864 o Bugfixes on 0.1.0.x:
4865 - Fix a possible double-free in tor_gzip_uncompress().
4866 - When --disable-threads is set, do not search for or link against
4868 - Don't trigger an assert if an authoritative directory server
4869 claims its dirport is 0.
4870 - Fix bug with removing Tor as an NT service: some people were
4871 getting "The service did not return an error." Thanks to Matt
4875 Changes in version 0.1.1.2-alpha - 2005-07-15
4876 o New directory servers:
4877 - tor26 has changed IP address.
4879 o Bugfixes on 0.1.0.x, crashes/leaks:
4880 - Port the servers-not-obeying-their-exit-policies fix from
4882 - Fix an fd leak in start_daemon().
4883 - On Windows, you can't always reopen a port right after you've
4884 closed it. So change retry_listeners() to only close and re-open
4885 ports that have changed.
4886 - Fix a possible double-free in tor_gzip_uncompress().
4888 o Bugfixes on 0.1.0.x, usability:
4889 - When tor_socketpair() fails in Windows, give a reasonable
4890 Windows-style errno back.
4891 - Let people type "tor --install" as well as "tor -install" when
4893 want to make it an NT service.
4894 - NT service patch from Matt Edman to improve error messages.
4895 - When the controller asks for a config option with an abbreviated
4896 name, give the full name in our response.
4897 - Correct the man page entry on TrackHostExitsExpire.
4898 - Looks like we were never delivering deflated (i.e. compressed)
4899 running-routers lists, even when asked. Oops.
4900 - When --disable-threads is set, do not search for or link against
4903 o Bugfixes on 0.1.1.x:
4904 - Fix a seg fault with autodetecting which controller version is
4908 - New hidden service descriptor format: put a version in it, and
4909 let people specify introduction/rendezvous points that aren't
4910 in "the directory" (which is subjective anyway).
4911 - Allow the DEBUG controller event to work again. Mark certain log
4912 entries as "don't tell this to controllers", so we avoid cycles.
4915 Changes in version 0.1.0.11 - 2005-06-30
4916 o Bugfixes on 0.1.0.x:
4917 - Fix major security bug: servers were disregarding their
4918 exit policies if clients behaved unexpectedly.
4919 - Make OS X init script check for missing argument, so we don't
4920 confuse users who invoke it incorrectly.
4921 - Fix a seg fault in "tor --hash-password foo".
4922 - The MAPADDRESS control command was broken.
4925 Changes in version 0.1.1.1-alpha - 2005-06-29
4927 - Make OS X init script check for missing argument, so we don't
4928 confuse users who invoke it incorrectly.
4929 - Fix a seg fault in "tor --hash-password foo".
4930 - Fix a possible way to DoS dirservers.
4931 - When we complain that your exit policy implicitly allows local or
4932 private address spaces, name them explicitly so operators can
4934 - Make the log message less scary when all the dirservers are
4935 temporarily unreachable.
4936 - We were printing the number of idle dns workers incorrectly when
4940 - Revised controller protocol (version 1) that uses ascii rather
4941 than binary. Add supporting libraries in python and java so you
4942 can use the controller from your applications without caring how
4944 - Spiffy new support for crypto hardware accelerators. Can somebody
4948 Changes in version 0.0.9.10 - 2005-06-16
4949 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
4950 - Refuse relay cells that claim to have a length larger than the
4951 maximum allowed. This prevents a potential attack that could read
4952 arbitrary memory (e.g. keys) from an exit server's process
4956 Changes in version 0.1.0.10 - 2005-06-14
4957 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
4958 libevent before 1.1a.
4961 Changes in version 0.1.0.9-rc - 2005-06-09
4963 - Reset buf->highwater every time buf_shrink() is called, not just on
4964 a successful shrink. This was causing significant memory bloat.
4965 - Fix buffer overflow when checking hashed passwords.
4966 - Security fix: if seeding the RNG on Win32 fails, quit.
4967 - Allow seeding the RNG on Win32 even when you're not running as
4969 - Disable threading on Solaris too. Something is wonky with it,
4970 cpuworkers, and reentrant libs.
4971 - Reenable the part of the code that tries to flush as soon as an
4972 OR outbuf has a full TLS record available. Perhaps this will make
4973 OR outbufs not grow as huge except in rare cases, thus saving lots
4974 of CPU time plus memory.
4975 - Reject malformed .onion addresses rather then passing them on as
4976 normal web requests.
4977 - Adapt patch from Adam Langley: fix possible memory leak in
4978 tor_lookup_hostname().
4979 - Initialize libevent later in the startup process, so the logs are
4980 already established by the time we start logging libevent warns.
4981 - Use correct errno on win32 if libevent fails.
4982 - Check and warn about known-bad/slow libevent versions.
4983 - Pay more attention to the ClientOnly config option.
4984 - Have torctl.in/tor.sh.in check for location of su binary (needed
4986 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
4987 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
4988 HttpProxyAuthenticator
4989 - Stop warning about sigpipes in the logs. We're going to
4990 pretend that getting these occassionally is normal and fine.
4991 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
4993 installer screens; and don't put stuff into StartupItems unless
4994 the user asks you to.
4995 - Require servers that use the default dirservers to have public IP
4996 addresses. We have too many servers that are configured with private
4997 IPs and their admins never notice the log entries complaining that
4998 their descriptors are being rejected.
4999 - Add OSX uninstall instructions. An actual uninstall script will
5003 Changes in version 0.1.0.8-rc - 2005-05-23
5005 - It turns out that kqueue on OS X 10.3.9 was causing kernel
5006 panics. Disable kqueue on all OS X Tors.
5007 - Fix RPM: remove duplicate line accidentally added to the rpm
5009 - Disable threads on openbsd too, since its gethostaddr is not
5011 - Tolerate libevent 0.8 since it still works, even though it's
5013 - Enable building on Red Hat 9.0 again.
5014 - Allow the middle hop of the testing circuit to be running any
5015 version, now that most of them have the bugfix to let them connect
5016 to unknown servers. This will allow reachability testing to work
5017 even when 0.0.9.7-0.0.9.9 become obsolete.
5018 - Handle relay cells with rh.length too large. This prevents
5019 a potential attack that could read arbitrary memory (maybe even
5020 keys) from the exit server's process.
5021 - We screwed up the dirport reachability testing when we don't yet
5022 have a cached version of the directory. Hopefully now fixed.
5023 - Clean up router_load_single_router() (used by the controller),
5024 so it doesn't seg fault on error.
5025 - Fix a minor memory leak when somebody establishes an introduction
5026 point at your Tor server.
5027 - If a socks connection ends because read fails, don't warn that
5028 you're not sending a socks reply back.
5031 - Add HttpProxyAuthenticator config option too, that works like
5032 the HttpsProxyAuthenticator config option.
5033 - Encode hashed controller passwords in hex instead of base64,
5034 to make it easier to write controllers.
5037 Changes in version 0.1.0.7-rc - 2005-05-17
5039 - Fix a bug in the OS X package installer that prevented it from
5040 installing on Tiger.
5041 - Fix a script bug in the OS X package installer that made it
5042 complain during installation.
5043 - Find libevent even if it's hiding in /usr/local/ and your
5044 CFLAGS and LDFLAGS don't tell you to look there.
5045 - Be able to link with libevent as a shared library (the default
5046 after 1.0d), even if it's hiding in /usr/local/lib and even
5047 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
5048 assuming you're running gcc. Otherwise fail and give a useful
5050 - Fix a bug in the RPM packager: set home directory for _tor to
5051 something more reasonable when first installing.
5052 - Free a minor amount of memory that is still reachable on exit.
5055 Changes in version 0.1.0.6-rc - 2005-05-14
5057 - Implement --disable-threads configure option. Disable threads on
5058 netbsd by default, because it appears to have no reentrant resolver
5060 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
5061 release (1.1) detects and disables kqueue if it's broken.
5062 - Append default exit policy before checking for implicit internal
5063 addresses. Now we don't log a bunch of complaints on startup
5064 when using the default exit policy.
5065 - Some people were putting "Address " in their torrc, and they had
5066 a buggy resolver that resolved " " to 0.0.0.0. Oops.
5067 - If DataDir is ~/.tor, and that expands to /.tor, then default to
5068 LOCALSTATEDIR/tor instead.
5069 - Fix fragmented-message bug in TorControl.py.
5070 - Resolve a minor bug which would prevent unreachable dirports
5071 from getting suppressed in the published descriptor.
5072 - When the controller gave us a new descriptor, we weren't resolving
5073 it immediately, so Tor would think its address was 0.0.0.0 until
5074 we fetched a new directory.
5075 - Fix an uppercase/lowercase case error in suppressing a bogus
5076 libevent warning on some Linuxes.
5079 - Begin scrubbing sensitive strings from logs by default. Turn off
5080 the config option SafeLogging if you need to do debugging.
5081 - Switch to a new buffer management algorithm, which tries to avoid
5082 reallocing and copying quite as much. In first tests it looks like
5083 it uses *more* memory on average, but less cpu.
5084 - First cut at support for "create-fast" cells. Clients can use
5085 these when extending to their first hop, since the TLS already
5086 provides forward secrecy and authentication. Not enabled on
5088 - When dirservers refuse a router descriptor, we now log its
5089 contactinfo, platform, and the poster's IP address.
5090 - Call tor_free_all instead of connections_free_all after forking, to
5091 save memory on systems that need to fork.
5092 - Whine at you if you're a server and you don't set your contactinfo.
5093 - Implement --verify-config command-line option to check if your torrc
5094 is valid without actually launching Tor.
5095 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
5096 rather than just rejecting it.
5099 Changes in version 0.1.0.5-rc - 2005-04-27
5101 - Stop trying to print a null pointer if an OR conn fails because
5102 we didn't like its cert.
5104 - Switch our internal buffers implementation to use a ring buffer,
5105 to hopefully improve performance for fast servers a lot.
5106 - Add HttpsProxyAuthenticator support (basic auth only), based
5107 on patch from Adam Langley.
5108 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
5109 the fast servers that have been joining lately.
5110 - Give hidden service accesses extra time on the first attempt,
5111 since 60 seconds is often only barely enough. This might improve
5113 - Improve performance for dirservers: stop re-parsing the whole
5114 directory every time you regenerate it.
5115 - Add more debugging info to help us find the weird dns freebsd
5116 pthreads bug; cleaner debug messages to help track future issues.
5119 Changes in version 0.0.9.9 - 2005-04-23
5120 o Bugfixes on 0.0.9.x:
5121 - If unofficial Tor clients connect and send weird TLS certs, our
5122 Tor server triggers an assert. This release contains a minimal
5123 backport from the broader fix that we put into 0.1.0.4-rc.
5126 Changes in version 0.1.0.4-rc - 2005-04-23
5128 - If unofficial Tor clients connect and send weird TLS certs, our
5129 Tor server triggers an assert. Stop asserting, and start handling
5130 TLS errors better in other situations too.
5131 - When the controller asks us to tell it about all the debug-level
5132 logs, it turns out we were generating debug-level logs while
5133 telling it about them, which turns into a bad loop. Now keep
5134 track of whether you're sending a debug log to the controller,
5135 and don't log when you are.
5136 - Fix the "postdescriptor" feature of the controller interface: on
5137 non-complete success, only say "done" once.
5139 - Clients are now willing to load balance over up to 2mB, not 1mB,
5140 of advertised bandwidth capacity.
5141 - Add a NoPublish config option, so you can be a server (e.g. for
5142 testing running Tor servers in other Tor networks) without
5143 publishing your descriptor to the primary dirservers.
5146 Changes in version 0.1.0.3-rc - 2005-04-08
5147 o Improvements on 0.1.0.2-rc:
5148 - Client now retries when streams end early for 'hibernating' or
5149 'resource limit' reasons, rather than failing them.
5150 - More automated handling for dirserver operators:
5151 - Automatically approve nodes running 0.1.0.2-rc or later,
5152 now that the the reachability detection stuff is working.
5153 - Now we allow two unverified servers with the same nickname
5154 but different keys. But if a nickname is verified, only that
5155 nickname+key are allowed.
5156 - If you're an authdirserver connecting to an address:port,
5157 and it's not the OR you were expecting, forget about that
5158 descriptor. If he *was* the one you were expecting, then forget
5159 about all other descriptors for that address:port.
5160 - Allow servers to publish descriptors from 12 hours in the future.
5161 Corollary: only whine about clock skew from the dirserver if
5162 he's a trusted dirserver (since now even verified servers could
5163 have quite wrong clocks).
5164 - Adjust maximum skew and age for rendezvous descriptors: let skew
5165 be 48 hours rather than 90 minutes.
5166 - Efficiency improvements:
5167 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
5168 it much faster to look up a circuit for each relay cell.
5169 - Remove most calls to assert_all_pending_dns_resolves_ok(),
5170 since they're eating our cpu on exit nodes.
5171 - Stop wasting time doing a case insensitive comparison for every
5172 dns name every time we do any lookup. Canonicalize the names to
5173 lowercase and be done with it.
5174 - Start sending 'truncated' cells back rather than destroy cells,
5175 if the circuit closes in front of you. This means we won't have
5176 to abandon partially built circuits.
5177 - Only warn once per nickname from add_nickname_list_to_smartlist
5178 per failure, so an entrynode or exitnode choice that's down won't
5180 - Put a note in the torrc about abuse potential with the default
5182 - Revise control spec and implementation to allow all log messages to
5183 be sent to controller with their severities intact (suggested by
5184 Matt Edman). Update TorControl to handle new log event types.
5185 - Provide better explanation messages when controller's POSTDESCRIPTOR
5187 - Stop putting nodename in the Platform string in server descriptors.
5188 It doesn't actually help, and it is confusing/upsetting some people.
5190 o Bugfixes on 0.1.0.2-rc:
5191 - We were printing the host mask wrong in exit policies in server
5192 descriptors. This isn't a critical bug though, since we were still
5193 obeying the exit policy internally.
5194 - Fix Tor when compiled with libevent but without pthreads: move
5195 connection_unregister() from _connection_free() to
5197 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
5198 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
5199 when we look through the connection array, we'll find any of the
5200 cpu/dnsworkers. This is no good.
5202 o Bugfixes on 0.0.9.8:
5203 - Fix possible bug on threading platforms (e.g. win32) which was
5204 leaking a file descriptor whenever a cpuworker or dnsworker died.
5205 - When using preferred entry or exit nodes, ignore whether the
5206 circuit wants uptime or capacity. They asked for the nodes, they
5208 - chdir() to your datadirectory at the *end* of the daemonize process,
5209 not the beginning. This was a problem because the first time you
5210 run tor, if your datadir isn't there, and you have runasdaemon set
5211 to 1, it will try to chdir to it before it tries to create it. Oops.
5212 - Handle changed router status correctly when dirserver reloads
5213 fingerprint file. We used to be dropping all unverified descriptors
5214 right then. The bug was hidden because we would immediately
5215 fetch a directory from another dirserver, which would include the
5216 descriptors we just dropped.
5217 - When we're connecting to an OR and he's got a different nickname/key
5218 than we were expecting, only complain loudly if we're an OP or a
5219 dirserver. Complaining loudly to the OR admins just confuses them.
5220 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
5221 artificially capped at 500kB.
5224 Changes in version 0.0.9.8 - 2005-04-07
5225 o Bugfixes on 0.0.9.x:
5226 - We have a bug that I haven't found yet. Sometimes, very rarely,
5227 cpuworkers get stuck in the 'busy' state, even though the cpuworker
5228 thinks of itself as idle. This meant that no new circuits ever got
5229 established. Here's a workaround to kill any cpuworker that's been
5230 busy for more than 100 seconds.
5233 Changes in version 0.1.0.2-rc - 2005-04-01
5234 o Bugfixes on 0.1.0.1-rc:
5235 - Fixes on reachability detection:
5236 - Don't check for reachability while hibernating.
5237 - If ORPort is reachable but DirPort isn't, still publish the
5238 descriptor, but zero out DirPort until it's found reachable.
5239 - When building testing circs for ORPort testing, use only
5240 high-bandwidth nodes, so fewer circuits fail.
5241 - Complain about unreachable ORPort separately from unreachable
5242 DirPort, so the user knows what's going on.
5243 - Make sure we only conclude ORPort reachability if we didn't
5244 initiate the conn. Otherwise we could falsely conclude that
5245 we're reachable just because we connected to the guy earlier
5246 and he used that same pipe to extend to us.
5247 - Authdirservers shouldn't do ORPort reachability detection,
5248 since they're in clique mode, so it will be rare to find a
5249 server not already connected to them.
5250 - When building testing circuits, always pick middle hops running
5251 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
5252 bug. (This is a kludge; it will go away when 0.0.9.x becomes
5254 - When we decide we're reachable, actually publish our descriptor
5256 - Fix bug in redirectstream in the controller.
5257 - Fix the state descriptor strings so logs don't claim edge streams
5258 are in a different state than they actually are.
5259 - Use recent libevent features when possible (this only really affects
5260 win32 and osx right now, because the new libevent with these
5261 features hasn't been released yet). Add code to suppress spurious
5263 - Prevent possible segfault in connection_close_unattached_ap().
5264 - Fix newlines on torrc in win32.
5265 - Improve error msgs when tor-resolve fails.
5267 o Improvements on 0.0.9.x:
5268 - New experimental script tor/contrib/ExerciseServer.py (needs more
5269 work) that uses the controller interface to build circuits and
5270 fetch pages over them. This will help us bootstrap servers that
5271 have lots of capacity but haven't noticed it yet.
5272 - New experimental script tor/contrib/PathDemo.py (needs more work)
5273 that uses the controller interface to let you choose whole paths
5275 "<hostname>.<path,separated by dots>.<length of path>.path"
5276 - When we've connected to an OR and handshaked but didn't like
5277 the result, we were closing the conn without sending destroy
5278 cells back for pending circuits. Now send those destroys.
5281 Changes in version 0.0.9.7 - 2005-04-01
5282 o Bugfixes on 0.0.9.x:
5283 - Fix another race crash bug (thanks to Glenn Fink for reporting).
5284 - Compare identity to identity, not to nickname, when extending to
5285 a router not already in the directory. This was preventing us from
5286 extending to unknown routers. Oops.
5287 - Make sure to create OS X Tor user in <500 range, so we aren't
5288 creating actual system users.
5289 - Note where connection-that-hasn't-sent-end was marked, and fix
5290 a few really loud instances of this harmless bug (it's fixed more
5294 Changes in version 0.1.0.1-rc - 2005-03-28
5296 - Add reachability testing. Your Tor server will automatically try
5297 to see if its ORPort and DirPort are reachable from the outside,
5298 and it won't upload its descriptor until it decides they are.
5299 - Handle unavailable hidden services better. Handle slow or busy
5300 hidden services better.
5301 - Add support for CONNECTing through https proxies, with "HttpsProxy"
5303 - New exit policy: accept most low-numbered ports, rather than
5304 rejecting most low-numbered ports.
5305 - More Tor controller support (still experimental). See
5306 http://tor.eff.org/doc/control-spec.txt for all the new features,
5307 including signals to emulate unix signals from any platform;
5308 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
5309 closestream; closecircuit; etc.
5310 - Make nt services work and start on startup on win32 (based on
5311 patch by Matt Edman).
5312 - Add a new AddressMap config directive to rewrite incoming socks
5313 addresses. This lets you, for example, declare an implicit
5314 required exit node for certain sites.
5315 - Add a new TrackHostExits config directive to trigger addressmaps
5316 for certain incoming socks addresses -- for sites that break when
5317 your exit keeps changing (based on patch by Mike Perry).
5318 - Redo the client-side dns cache so it's just an addressmap too.
5319 - Notice when our IP changes, and reset stats/uptime/reachability.
5320 - When an application is using socks5, give him the whole variety of
5321 potential socks5 responses (connect refused, host unreachable, etc),
5322 rather than just "success" or "failure".
5323 - A more sane version numbering system. See
5324 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
5325 - New contributed script "exitlist": a simple python script to
5326 parse directories and find Tor nodes that exit to listed
5328 - New contributed script "privoxy-tor-toggle" to toggle whether
5329 Privoxy uses Tor. Seems to be configured for Debian by default.
5330 - Report HTTP reasons to client when getting a response from directory
5331 servers -- so you can actually know what went wrong.
5332 - New config option MaxAdvertisedBandwidth which lets you advertise
5333 a low bandwidthrate (to not attract as many circuits) while still
5334 allowing a higher bandwidthrate in reality.
5336 o Robustness/stability fixes:
5337 - Make Tor use Niels Provos's libevent instead of its current
5338 poll-but-sometimes-select mess. This will let us use faster async
5339 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
5341 - pthread support now too. This was forced because when we forked,
5342 we ended up wasting a lot of duplicate ram over time. Also switch
5343 to foo_r versions of some library calls to allow reentry and
5345 - Better handling for heterogeneous / unreliable nodes:
5346 - Annotate circuits w/ whether they aim to contain high uptime nodes
5347 and/or high capacity nodes. When building circuits, choose
5349 - This means that every single node in an intro rend circuit,
5350 not just the last one, will have a minimum uptime.
5351 - New config option LongLivedPorts to indicate application streams
5352 that will want high uptime circuits.
5353 - Servers reset uptime when a dir fetch entirely fails. This
5354 hopefully reflects stability of the server's network connectivity.
5355 - If somebody starts his tor server in Jan 2004 and then fixes his
5356 clock, don't make his published uptime be a year.
5357 - Reset published uptime when you wake up from hibernation.
5358 - Introduce a notion of 'internal' circs, which are chosen without
5359 regard to the exit policy of the last hop. Intro and rendezvous
5360 circs must be internal circs, to avoid leaking information. Resolve
5361 and connect streams can use internal circs if they want.
5362 - New circuit pooling algorithm: make sure to have enough circs around
5363 to satisfy any predicted ports, and also make sure to have 2 internal
5364 circs around if we've required internal circs lately (and with high
5365 uptime if we've seen that lately too).
5366 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
5367 which describes how often we retry making new circuits if current
5368 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
5369 how long we're willing to make use of an already-dirty circuit.
5370 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
5371 circ as necessary, if there are any completed ones lying around
5372 when we try to launch one.
5373 - Make hidden services try to establish a rendezvous for 30 seconds,
5374 rather than for n (where n=3) attempts to build a circuit.
5375 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
5376 "ShutdownWaitLength".
5377 - Try to be more zealous about calling connection_edge_end when
5378 things go bad with edge conns in connection.c.
5379 - Revise tor-spec to add more/better stream end reasons.
5380 - Revise all calls to connection_edge_end to avoid sending "misc",
5381 and to take errno into account where possible.
5384 - Fix a race condition that can trigger an assert, when we have a
5385 pending create cell and an OR connection fails right then.
5386 - Fix several double-mark-for-close bugs, e.g. where we were finding
5387 a conn for a cell even if that conn is already marked for close.
5388 - Make sequence of log messages when starting on win32 with no config
5389 file more reasonable.
5390 - When choosing an exit node for a new non-internal circ, don't take
5391 into account whether it'll be useful for any pending x.onion
5392 addresses -- it won't.
5393 - Turn addr_policy_compare from a tristate to a quadstate; this should
5394 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
5395 for google.com" problem.
5396 - Make "platform" string in descriptor more accurate for Win32 servers,
5397 so it's not just "unknown platform".
5398 - Fix an edge case in parsing config options (thanks weasel).
5399 If they say "--" on the commandline, it's not an option.
5400 - Reject odd-looking addresses at the client (e.g. addresses that
5401 contain a colon), rather than having the server drop them because
5403 - tor-resolve requests were ignoring .exit if there was a working circuit
5404 they could use instead.
5405 - REUSEADDR on normal platforms means you can rebind to the port
5406 right after somebody else has let it go. But REUSEADDR on win32
5407 means to let you bind to the port _even when somebody else
5408 already has it bound_! So, don't do that on Win32.
5409 - Change version parsing logic: a version is "obsolete" if it is not
5410 recommended and (1) there is a newer recommended version in the
5411 same series, or (2) there are no recommended versions in the same
5412 series, but there are some recommended versions in a newer series.
5413 A version is "new" if it is newer than any recommended version in
5415 - Stop most cases of hanging up on a socks connection without sending
5419 - Require BandwidthRate to be at least 20kB/s for servers.
5420 - When a dirserver causes you to give a warn, mention which dirserver
5422 - New config option DirAllowPrivateAddresses for authdirservers.
5423 Now by default they refuse router descriptors that have non-IP or
5424 private-IP addresses.
5425 - Stop publishing socksport in the directory, since it's not
5426 actually meant to be public. For compatibility, publish a 0 there
5428 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
5429 smart" value, that is low for servers and high for clients.
5430 - If our clock jumps forward by 100 seconds or more, assume something
5431 has gone wrong with our network and abandon all not-yet-used circs.
5432 - Warn when exit policy implicitly allows local addresses.
5433 - If we get an incredibly skewed timestamp from a dirserver mirror
5434 that isn't a verified OR, don't warn -- it's probably him that's
5436 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
5437 cookies to disk and doesn't log each web request to disk. (Thanks
5438 to Brett Carrington for pointing this out.)
5439 - When a client asks us for a dir mirror and we don't have one,
5440 launch an attempt to get a fresh one.
5441 - If we're hibernating and we get a SIGINT, exit immediately.
5442 - Add --with-dmalloc ./configure option, to track memory leaks.
5443 - And try to free all memory on closing, so we can detect what
5445 - Cache local dns resolves correctly even when they're .exit
5447 - Give a better warning when some other server advertises an
5448 ORPort that is actually an apache running ssl.
5449 - Add "opt hibernating 1" to server descriptor to make it clearer
5450 whether the server is hibernating.
5453 Changes in version 0.0.9.6 - 2005-03-24
5454 o Bugfixes on 0.0.9.x (crashes and asserts):
5455 - Add new end stream reasons to maintainance branch. Fix bug where
5456 reason (8) could trigger an assert. Prevent bug from recurring.
5457 - Apparently win32 stat wants paths to not end with a slash.
5458 - Fix assert triggers in assert_cpath_layer_ok(), where we were
5459 blowing away the circuit that conn->cpath_layer points to, then
5460 checking to see if the circ is well-formed. Backport check to make
5461 sure we dont use the cpath on a closed connection.
5462 - Prevent circuit_resume_edge_reading_helper() from trying to package
5463 inbufs for marked-for-close streams.
5464 - Don't crash on hup if your options->address has become unresolvable.
5465 - Some systems (like OS X) sometimes accept() a connection and tell
5466 you the remote host is 0.0.0.0:0. If this happens, due to some
5467 other mis-features, we get confused; so refuse the conn for now.
5469 o Bugfixes on 0.0.9.x (other):
5470 - Fix harmless but scary "Unrecognized content encoding" warn message.
5471 - Add new stream error reason: TORPROTOCOL reason means "you are not
5472 speaking a version of Tor I understand; say bye-bye to your stream."
5473 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
5474 into the future, now that we are more tolerant of skew. This
5475 resolves a bug where a Tor server would refuse to cache a directory
5476 because all the directories it gets are too far in the future;
5477 yet the Tor server never logs any complaints about clock skew.
5478 - Mac packaging magic: make man pages useable, and do not overwrite
5479 existing torrc files.
5480 - Make OS X log happily to /var/log/tor/tor.log
5483 Changes in version 0.0.9.5 - 2005-02-22
5484 o Bugfixes on 0.0.9.x:
5485 - Fix an assert race at exit nodes when resolve requests fail.
5486 - Stop picking unverified dir mirrors--it only leads to misery.
5487 - Patch from Matt Edman to make NT services work better. Service
5488 support is still not compiled into the executable by default.
5489 - Patch from Dmitri Bely so the Tor service runs better under
5490 the win32 SYSTEM account.
5491 - Make tor-resolve actually work (?) on Win32.
5492 - Fix a sign bug when getrlimit claims to have 4+ billion
5493 file descriptors available.
5494 - Stop refusing to start when bandwidthburst == bandwidthrate.
5495 - When create cells have been on the onion queue more than five
5496 seconds, just send back a destroy and take them off the list.
5499 Changes in version 0.0.9.4 - 2005-02-03
5500 o Bugfixes on 0.0.9:
5501 - Fix an assert bug that took down most of our servers: when
5502 a server claims to have 1 GB of bandwidthburst, don't
5504 - Don't crash as badly if we have spawned the max allowed number
5505 of dnsworkers, or we're out of file descriptors.
5506 - Block more file-sharing ports in the default exit policy.
5507 - MaxConn is now automatically set to the hard limit of max
5508 file descriptors we're allowed (ulimit -n), minus a few for
5510 - Give a clearer message when servers need to raise their
5511 ulimit -n when they start running out of file descriptors.
5512 - SGI Compatibility patches from Jan Schaumann.
5513 - Tolerate a corrupt cached directory better.
5514 - When a dirserver hasn't approved your server, list which one.
5515 - Go into soft hibernation after 95% of the bandwidth is used,
5516 not 99%. This is especially important for daily hibernators who
5517 have a small accounting max. Hopefully it will result in fewer
5518 cut connections when the hard hibernation starts.
5519 - Load-balance better when using servers that claim more than
5520 800kB/s of capacity.
5521 - Make NT services work (experimental, only used if compiled in).
5524 Changes in version 0.0.9.3 - 2005-01-21
5525 o Bugfixes on 0.0.9:
5526 - Backport the cpu use fixes from main branch, so busy servers won't
5527 need as much processor time.
5528 - Work better when we go offline and then come back, or when we
5529 run Tor at boot before the network is up. We do this by
5530 optimistically trying to fetch a new directory whenever an
5531 application request comes in and we think we're offline -- the
5532 human is hopefully a good measure of when the network is back.
5533 - Backport some minimal hidserv bugfixes: keep rend circuits open as
5534 long as you keep using them; actually publish hidserv descriptors
5535 shortly after they change, rather than waiting 20-40 minutes.
5536 - Enable Mac startup script by default.
5537 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
5538 - When you update AllowUnverifiedNodes or FirewallPorts via the
5539 controller's setconf feature, we were always appending, never
5541 - When you update HiddenServiceDir via setconf, it was screwing up
5542 the order of reading the lines, making it fail.
5543 - Do not rewrite a cached directory back to the cache; otherwise we
5544 will think it is recent and not fetch a newer one on startup.
5545 - Workaround for webservers that lie about Content-Encoding: Tor
5546 now tries to autodetect compressed directories and compression
5547 itself. This lets us Proxypass dir fetches through apache.
5550 Changes in version 0.0.9.2 - 2005-01-04
5551 o Bugfixes on 0.0.9 (crashes and asserts):
5552 - Fix an assert on startup when the disk is full and you're logging
5554 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
5555 style address, then we'd crash.
5556 - Fix an assert trigger when the running-routers string we get from
5557 a dirserver is broken.
5558 - Make worker threads start and run on win32. Now win32 servers
5560 - Bandaid (not actually fix, but now it doesn't crash) an assert
5561 where the dns worker dies mysteriously and the main Tor process
5562 doesn't remember anything about the address it was resolving.
5564 o Bugfixes on 0.0.9 (Win32):
5565 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
5566 name out of the warning/assert messages.
5567 - Fix a superficial "unhandled error on read" bug on win32.
5568 - The win32 installer no longer requires a click-through for our
5569 license, since our Free Software license grants rights but does not
5571 - Win32: When connecting to a dirserver fails, try another one
5572 immediately. (This was already working for non-win32 Tors.)
5573 - Stop trying to parse $HOME on win32 when hunting for default
5575 - Make tor-resolve.c work on win32 by calling network_init().
5577 o Bugfixes on 0.0.9 (other):
5578 - Make 0.0.9.x build on Solaris again.
5579 - Due to a fencepost error, we were blowing away the \n when reporting
5580 confvalue items in the controller. So asking for multiple config
5581 values at once couldn't work.
5582 - When listing circuits that are pending on an opening OR connection,
5583 if we're an OR we were listing circuits that *end* at us as
5584 being pending on every listener, dns/cpu worker, etc. Stop that.
5585 - Dirservers were failing to create 'running-routers' or 'directory'
5586 strings if we had more than some threshold of routers. Fix them so
5587 they can handle any number of routers.
5588 - Fix a superficial "Duplicate mark for close" bug.
5589 - Stop checking for clock skew for OR connections, even for servers.
5590 - Fix a fencepost error that was chopping off the last letter of any
5591 nickname that is the maximum allowed nickname length.
5592 - Update URLs in log messages so they point to the new website.
5593 - Fix a potential problem in mangling server private keys while
5594 writing to disk (not triggered yet, as far as we know).
5595 - Include the licenses for other free software we include in Tor,
5596 now that we're shipping binary distributions more regularly.
5599 Changes in version 0.0.9.1 - 2004-12-15
5600 o Bugfixes on 0.0.9:
5601 - Make hibernation actually work.
5602 - Make HashedControlPassword config option work.
5603 - When we're reporting event circuit status to a controller,
5604 don't use the stream status code.
5607 Changes in version 0.0.9 - 2004-12-12
5609 - Clean up manpage and torrc.sample file.
5610 - Clean up severities and text of log warnings.
5612 - Make servers trigger an assert when they enter hibernation.
5615 Changes in version 0.0.9rc7 - 2004-12-08
5616 o Bugfixes on 0.0.9rc:
5617 - Fix a stack-trashing crash when an exit node begins hibernating.
5618 - Avoid looking at unallocated memory while considering which
5619 ports we need to build circuits to cover.
5620 - Stop a sigpipe: when an 'end' cell races with eof from the app,
5621 we shouldn't hold-open-until-flush if the eof arrived first.
5622 - Fix a bug with init_cookie_authentication() in the controller.
5623 - When recommending new-format log lines, if the upper bound is
5624 LOG_ERR, leave it implicit.
5626 o Bugfixes on 0.0.8.1:
5627 - Fix a whole slew of memory leaks.
5628 - Fix isspace() and friends so they still make Solaris happy
5629 but also so they don't trigger asserts on win32.
5630 - Fix parse_iso_time on platforms without strptime (eg win32).
5631 - win32: tolerate extra "readable" events better.
5632 - win32: when being multithreaded, leave parent fdarray open.
5633 - Make unit tests work on win32.
5636 Changes in version 0.0.9rc6 - 2004-12-06
5637 o Bugfixes on 0.0.9pre:
5638 - Clean up some more integer underflow opportunities (not exploitable
5640 - While hibernating, hup should not regrow our listeners.
5641 - Send an end to the streams we close when we hibernate, rather
5642 than just chopping them off.
5643 - React to eof immediately on non-open edge connections.
5645 o Bugfixes on 0.0.8.1:
5646 - Calculate timeout for waiting for a connected cell from the time
5647 we sent the begin cell, not from the time the stream started. If
5648 it took a long time to establish the circuit, we would time out
5649 right after sending the begin cell.
5650 - Fix router_compare_addr_to_addr_policy: it was not treating a port
5651 of * as always matching, so we were picking reject *:* nodes as
5652 exit nodes too. Oops.
5655 - New circuit building strategy: keep a list of ports that we've
5656 used in the past 6 hours, and always try to have 2 circuits open
5657 or on the way that will handle each such port. Seed us with port
5658 80 so web users won't complain that Tor is "slow to start up".
5659 - Make kill -USR1 dump more useful stats about circuits.
5660 - When warning about retrying or giving up, print the address, so
5661 the user knows which one it's talking about.
5662 - If you haven't used a clean circuit in an hour, throw it away,
5663 just to be on the safe side. (This means after 6 hours a totally
5664 unused Tor client will have no circuits open.)
5667 Changes in version 0.0.9rc5 - 2004-12-01
5668 o Bugfixes on 0.0.8.1:
5669 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
5670 - Let resolve conns retry/expire also, rather than sticking around
5672 - If we are using select, make sure we stay within FD_SETSIZE.
5674 o Bugfixes on 0.0.9pre:
5675 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
5676 but doesn't seem to be currently; thanks to Ilja van Sprundel for
5678 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
5679 instead. Impose minima and maxima for all *Period options; impose
5680 even tighter maxima for fetching if we are a caching dirserver.
5681 Clip rather than rejecting.
5682 - Fetch cached running-routers from servers that serve it (that is,
5683 authdirservers and servers running 0.0.9rc5-cvs or later.)
5686 - Accept *:706 (silc) in default exit policy.
5687 - Implement new versioning format for post 0.1.
5688 - Support "foo.nickname.exit" addresses, to let Alice request the
5689 address "foo" as viewed by exit node "nickname". Based on a patch
5691 - Make tor --version --version dump the cvs Id of every file.
5694 Changes in version 0.0.9rc4 - 2004-11-28
5695 o Bugfixes on 0.0.8.1:
5696 - Make windows sockets actually non-blocking (oops), and handle
5697 win32 socket errors better.
5699 o Bugfixes on 0.0.9rc1:
5700 - Actually catch the -USR2 signal.
5703 Changes in version 0.0.9rc3 - 2004-11-25
5704 o Bugfixes on 0.0.8.1:
5705 - Flush the log file descriptor after we print "Tor opening log file",
5706 so we don't see those messages days later.
5708 o Bugfixes on 0.0.9rc1:
5709 - Make tor-resolve work again.
5710 - Avoid infinite loop in tor-resolve if tor hangs up on it.
5711 - Fix an assert trigger for clients/servers handling resolves.
5714 Changes in version 0.0.9rc2 - 2004-11-24
5715 o Bugfixes on 0.0.9rc1:
5716 - I broke socks5 support while fixing the eof bug.
5717 - Allow unitless bandwidths and intervals; they default to bytes
5719 - New servers don't start out hibernating; they are active until
5720 they run out of bytes, so they have a better estimate of how
5721 long it takes, and so their operators can know they're working.
5724 Changes in version 0.0.9rc1 - 2004-11-23
5725 o Bugfixes on 0.0.8.1:
5726 - Finally fix a bug that's been plaguing us for a year:
5727 With high load, circuit package window was reaching 0. Whenever
5728 we got a circuit-level sendme, we were reading a lot on each
5729 socket, but only writing out a bit. So we would eventually reach
5730 eof. This would be noticed and acted on even when there were still
5731 bytes sitting in the inbuf.
5732 - When poll() is interrupted, we shouldn't believe the revents values.
5734 o Bugfixes on 0.0.9pre6:
5735 - Fix hibernate bug that caused pre6 to be broken.
5736 - Don't keep rephist info for routers that haven't had activity for
5737 24 hours. (This matters now that clients have keys, since we track
5739 - Never call close_temp_logs while validating log options.
5740 - Fix backslash-escaping on tor.sh.in and torctl.in.
5743 - Implement weekly/monthly/daily accounting: now you specify your
5744 hibernation properties by
5745 AccountingMax N bytes|KB|MB|GB|TB
5746 AccountingStart day|week|month [day] HH:MM
5747 Defaults to "month 1 0:00".
5748 - Let bandwidth and interval config options be specified as 5 bytes,
5749 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
5750 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
5751 get back to normal.)
5752 - If your requested entry or exit node has advertised bandwidth 0,
5754 - Be more greedy about filling up relay cells -- we try reading again
5755 once we've processed the stuff we read, in case enough has arrived
5756 to fill the last cell completely.
5757 - Apply NT service patch from Osamu Fujino. Still needs more work.
5760 Changes in version 0.0.9pre6 - 2004-11-15
5761 o Bugfixes on 0.0.8.1:
5762 - Fix assert failure on malformed socks4a requests.
5763 - Use identity comparison, not nickname comparison, to choose which
5764 half of circuit-ID-space each side gets to use. This is needed
5765 because sometimes we think of a router as a nickname, and sometimes
5766 as a hex ID, and we can't predict what the other side will do.
5767 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
5768 write() call will fail and we handle it there.
5769 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
5770 and smartlist_len, which are two major profiling offenders.
5772 o Bugfixes on 0.0.9pre5:
5773 - Fix a bug in read_all that was corrupting config files on windows.
5774 - When we're raising the max number of open file descriptors to
5775 'unlimited', don't log that we just raised it to '-1'.
5776 - Include event code with events, as required by control-spec.txt.
5777 - Don't give a fingerprint when clients do --list-fingerprint:
5778 it's misleading, because it will never be the same again.
5779 - Stop using strlcpy in tor_strndup, since it was slowing us
5781 - Remove warn on startup about missing cached-directory file.
5782 - Make kill -USR1 work again.
5783 - Hibernate if we start tor during the "wait for wakeup-time" phase
5784 of an accounting interval. Log our hibernation plans better.
5785 - Authoritative dirservers now also cache their directory, so they
5786 have it on start-up.
5789 - Fetch running-routers; cache running-routers; compress
5790 running-routers; serve compressed running-routers.z
5791 - Add NSI installer script contributed by J Doe.
5792 - Commit VC6 and VC7 workspace/project files.
5793 - Commit a tor.spec for making RPM files, with help from jbash.
5794 - Add contrib/torctl.in contributed by Glenn Fink.
5795 - Implement the control-spec's SAVECONF command, to write your
5796 configuration to torrc.
5797 - Get cookie authentication for the controller closer to working.
5798 - Include control-spec.txt in the tarball.
5799 - When set_conf changes our server descriptor, upload a new copy.
5800 But don't upload it too often if there are frequent changes.
5801 - Document authentication config in man page, and document signals
5803 - Clean up confusing parts of man page and torrc.sample.
5804 - Make expand_filename handle ~ and ~username.
5805 - Use autoconf to enable largefile support where necessary. Use
5806 ftello where available, since ftell can fail at 2GB.
5807 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
5808 log more informatively.
5809 - Give a slightly more useful output for "tor -h".
5810 - Refuse application socks connections to port 0.
5811 - Check clock skew for verified servers, but allow unverified
5812 servers and clients to have any clock skew.
5813 - Break DirFetchPostPeriod into:
5814 - DirFetchPeriod for fetching full directory,
5815 - StatusFetchPeriod for fetching running-routers,
5816 - DirPostPeriod for posting server descriptor,
5817 - RendPostPeriod for posting hidden service descriptors.
5818 - Make sure the hidden service descriptors are at a random offset
5819 from each other, to hinder linkability.
5822 Changes in version 0.0.9pre5 - 2004-11-09
5823 o Bugfixes on 0.0.9pre4:
5824 - Fix a seg fault in unit tests (doesn't affect main program).
5825 - Fix an assert bug where a hidden service provider would fail if
5826 the first hop of his rendezvous circuit was down.
5827 - Hidden service operators now correctly handle version 1 style
5828 INTRODUCE1 cells (nobody generates them still, so not a critical
5830 - If do_hup fails, actually notice.
5831 - Handle more errnos from accept() without closing the listener.
5832 Some OpenBSD machines were closing their listeners because
5833 they ran out of file descriptors.
5834 - Send resolve cells to exit routers that are running a new
5835 enough version of the resolve code to work right.
5836 - Better handling of winsock includes on non-MSV win32 compilers.
5837 - Some people had wrapped their tor client/server in a script
5838 that would restart it whenever it died. This did not play well
5839 with our "shut down if your version is obsolete" code. Now people
5840 don't fetch a new directory if their local cached version is
5842 - Make our autogen.sh work on ksh as well as bash.
5845 - Hibernation: New config option "AccountingMaxKB" lets you
5846 set how many KBytes per month you want to allow your server to
5847 consume. Rather than spreading those bytes out evenly over the
5848 month, we instead hibernate for some of the month and pop up
5849 at a deterministic time, work until the bytes are consumed, then
5850 hibernate again. Config option "MonthlyAccountingStart" lets you
5851 specify which day of the month your billing cycle starts on.
5852 - Control interface: a separate program can now talk to your
5853 client/server over a socket, and get/set config options, receive
5854 notifications of circuits and streams starting/finishing/dying,
5855 bandwidth used, etc. The next step is to get some GUIs working.
5856 Let us know if you want to help out. See doc/control-spec.txt .
5857 - Ship a contrib/tor-control.py as an example script to interact
5858 with the control port.
5859 - "tor --hash-password zzyxz" will output a salted password for
5860 use in authenticating to the control interface.
5861 - New log format in config:
5862 "Log minsev[-maxsev] stdout|stderr|syslog" or
5863 "Log minsev[-maxsev] file /var/foo"
5866 - DirPolicy config option, to let people reject incoming addresses
5867 from their dirserver.
5868 - "tor --list-fingerprint" will list your identity key fingerprint
5870 - Add "pass" target for RedirectExit, to make it easier to break
5871 out of a sequence of RedirectExit rules.
5872 - Clients now generate a TLS cert too, in preparation for having
5873 them act more like real nodes.
5874 - Ship src/win32/ in the tarball, so people can use it to build.
5875 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
5877 - New "router-status" line in directory, to better bind each verified
5878 nickname to its identity key.
5879 - Deprecate unofficial config option abbreviations, and abbreviations
5880 not on the command line.
5881 - Add a pure-C tor-resolve implementation.
5882 - Use getrlimit and friends to ensure we can reach MaxConn (currently
5883 1024) file descriptors.
5885 o Code security improvements, inspired by Ilja:
5886 - Replace sprintf with snprintf. (I think they were all safe, but
5888 - Replace strcpy/strncpy with strlcpy in more places.
5889 - Avoid strcat; use snprintf or strlcat instead.
5890 - snprintf wrapper with consistent (though not C99) overflow behavior.
5893 Changes in version 0.0.9pre4 - 2004-10-17
5894 o Bugfixes on 0.0.9pre3:
5895 - If the server doesn't specify an exit policy, use the real default
5896 exit policy, not reject *:*.
5897 - Ignore fascistfirewall when uploading/downloading hidden service
5898 descriptors, since we go through Tor for those; and when using
5899 an HttpProxy, since we assume it can reach them all.
5900 - When looking for an authoritative dirserver, use only the ones
5901 configured at boot. Don't bother looking in the directory.
5902 - The rest of the fix for get_default_conf_file() on older win32.
5903 - Make 'Routerfile' config option obsolete.
5906 - New 'MyFamily nick1,...' config option for a server to
5907 specify other servers that shouldn't be used in the same circuit
5908 with it. Only believed if nick1 also specifies us.
5909 - New 'NodeFamily nick1,nick2,...' config option for a client to
5910 specify nodes that it doesn't want to use in the same circuit.
5911 - New 'Redirectexit pattern address:port' config option for a
5912 server to redirect exit connections, e.g. to a local squid.
5915 Changes in version 0.0.9pre3 - 2004-10-13
5916 o Bugfixes on 0.0.8.1:
5917 - Better torrc example lines for dirbindaddress and orbindaddress.
5918 - Improved bounds checking on parsed ints (e.g. config options and
5919 the ones we find in directories.)
5920 - Better handling of size_t vs int, so we're more robust on 64
5922 - Fix the rest of the bug where a newly started OR would appear
5923 as unverified even after we've added his fingerprint and hupped
5925 - Fix a bug from 0.0.7: when read() failed on a stream, we would
5926 close it without sending back an end. So 'connection refused'
5927 would simply be ignored and the user would get no response.
5929 o Bugfixes on 0.0.9pre2:
5930 - Serving the cached-on-disk directory to people is bad. We now
5931 provide no directory until we've fetched a fresh one.
5932 - Workaround for bug on windows where cached-directories get crlf
5934 - Make get_default_conf_file() work on older windows too.
5935 - If we write a *:* exit policy line in the descriptor, don't write
5936 any more exit policy lines.
5939 - Use only 0.0.9pre1 and later servers for resolve cells.
5940 - Make the dirservers file obsolete.
5941 - Include a dir-signing-key token in directories to tell the
5942 parsing entity which key is being used to sign.
5943 - Remove the built-in bulky default dirservers string.
5944 - New config option "Dirserver %s:%d [fingerprint]", which can be
5945 repeated as many times as needed. If no dirservers specified,
5946 default to moria1,moria2,tor26.
5947 - Make moria2 advertise a dirport of 80, so people behind firewalls
5948 will be able to get a directory.
5949 - Http proxy support
5950 - Dirservers translate requests for http://%s:%d/x to /x
5951 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
5952 be routed through this host.
5953 - Clients ask for /tor/x rather than /x for new enough dirservers.
5954 This way we can one day coexist peacefully with apache.
5955 - Clients specify a "Host: %s%d" http header, to be compatible
5956 with more proxies, and so running squid on an exit node can work.
5959 Changes in version 0.0.8.1 - 2004-10-13
5961 - Fix a seg fault that can be triggered remotely for Tor
5962 clients/servers with an open dirport.
5963 - Fix a rare assert trigger, where routerinfos for entries in
5964 our cpath would expire while we're building the path.
5965 - Fix a bug in OutboundBindAddress so it (hopefully) works.
5966 - Fix a rare seg fault for people running hidden services on
5967 intermittent connections.
5968 - Fix a bug in parsing opt keywords with objects.
5969 - Fix a stale pointer assert bug when a stream detaches and
5971 - Fix a string format vulnerability (probably not exploitable)
5972 in reporting stats locally.
5973 - Fix an assert trigger: sometimes launching circuits can fail
5974 immediately, e.g. because too many circuits have failed recently.
5975 - Fix a compile warning on 64 bit platforms.
5978 Changes in version 0.0.9pre2 - 2004-10-03
5980 - Make fetching a cached directory work for 64-bit platforms too.
5981 - Make zlib.h a required header, not an optional header.
5984 Changes in version 0.0.9pre1 - 2004-10-01
5986 - Stop using separate defaults for no-config-file and
5987 empty-config-file. Now you have to explicitly turn off SocksPort,
5988 if you don't want it open.
5989 - Fix a bug in OutboundBindAddress so it (hopefully) works.
5990 - Improve man page to mention more of the 0.0.8 features.
5991 - Fix a rare seg fault for people running hidden services on
5992 intermittent connections.
5993 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
5995 - Fix more dns related bugs: send back resolve_failed and end cells
5996 more reliably when the resolve fails, rather than closing the
5997 circuit and then trying to send the cell. Also attach dummy resolve
5998 connections to a circuit *before* calling dns_resolve(), to fix
5999 a bug where cached answers would never be sent in RESOLVED cells.
6000 - When we run out of disk space, or other log writing error, don't
6001 crash. Just stop logging to that log and continue.
6002 - We were starting to daemonize before we opened our logs, so if
6003 there were any problems opening logs, we would complain to stderr,
6004 which wouldn't work, and then mysteriously exit.
6005 - Fix a rare bug where sometimes a verified OR would connect to us
6006 before he'd uploaded his descriptor, which would cause us to
6007 assign conn->nickname as though he's unverified. Now we look through
6008 the fingerprint list to see if he's there.
6009 - Fix a rare assert trigger, where routerinfos for entries in
6010 our cpath would expire while we're building the path.
6013 - Clients can ask dirservers for /dir.z to get a compressed version
6014 of the directory. Only works for servers running 0.0.9, of course.
6015 - Make clients cache directories and use them to seed their router
6016 lists at startup. This means clients have a datadir again.
6017 - Configuration infrastructure support for warning on obsolete
6019 - Respond to content-encoding headers by trying to uncompress as
6021 - Reply with a deflated directory when a client asks for "dir.z".
6022 We could use allow-encodings instead, but allow-encodings isn't
6023 specified in HTTP 1.0.
6024 - Raise the max dns workers from 50 to 100.
6025 - Discourage people from setting their dirfetchpostperiod more often
6026 than once per minute.
6027 - Protect dirservers from overzealous descriptor uploading -- wait
6028 10 seconds after directory gets dirty, before regenerating.
6031 Changes in version 0.0.8 - 2004-08-25
6032 o Port it to SunOS 5.9 / Athena
6035 Changes in version 0.0.8rc2 - 2004-08-20
6036 o Make it compile on cygwin again.
6037 o When picking unverified routers, skip those with low uptime and/or
6038 low bandwidth, depending on what properties you care about.
6041 Changes in version 0.0.8rc1 - 2004-08-18
6042 o Changes from 0.0.7.3:
6044 - Fix assert triggers: if the other side returns an address 0.0.0.0,
6045 don't put it into the client dns cache.
6046 - If a begin failed due to exit policy, but we believe the IP address
6047 should have been allowed, switch that router to exitpolicy reject *:*
6048 until we get our next directory.
6050 - Clients choose nodes proportional to advertised bandwidth.
6051 - Avoid using nodes with low uptime as introduction points.
6052 - Handle servers with dynamic IP addresses: don't replace
6053 options->Address with the resolved one at startup, and
6054 detect our address right before we make a routerinfo each time.
6055 - 'FascistFirewall' option to pick dirservers and ORs on specific
6056 ports; plus 'FirewallPorts' config option to tell FascistFirewall
6057 which ports are open. (Defaults to 80,443)
6058 - Be more aggressive about trying to make circuits when the network
6059 has changed (e.g. when you unsuspend your laptop).
6060 - Check for time skew on http headers; report date in response to
6062 - If the entrynode config line has only one node, don't pick it as
6064 - Add strict{entry|exit}nodes config options. If set to 1, then
6065 we refuse to build circuits that don't include the specified entry
6067 - OutboundBindAddress config option, to bind to a specific
6068 IP address for outgoing connect()s.
6069 - End truncated log entries (e.g. directories) with "[truncated]".
6071 o Patches to 0.0.8preX:
6073 - Patches to compile and run on win32 again (maybe)?
6074 - Fix crash when looking for ~/.torrc with no $HOME set.
6075 - Fix a race bug in the unit tests.
6076 - Handle verified/unverified name collisions better when new
6077 routerinfo's arrive in a directory.
6078 - Sometimes routers were getting entered into the stats before
6079 we'd assigned their identity_digest. Oops.
6080 - Only pick and establish intro points after we've gotten a
6083 - AllowUnverifiedNodes config option to let circuits choose no-name
6084 routers in entry,middle,exit,introduction,rendezvous positions.
6085 Allow middle and rendezvous positions by default.
6086 - Add a man page for tor-resolve.
6089 Changes in version 0.0.7.3 - 2004-08-12
6090 o Stop dnsworkers from triggering an assert failure when you
6091 ask them to resolve the host "".
6094 Changes in version 0.0.8pre3 - 2004-08-09
6095 o Changes from 0.0.7.2:
6096 - Allow multiple ORs with same nickname in routerlist -- now when
6097 people give us one identity key for a nickname, then later
6098 another, we don't constantly complain until the first expires.
6099 - Remember used bandwidth (both in and out), and publish 15-minute
6100 snapshots for the past day into our descriptor.
6101 - You can now fetch $DIRURL/running-routers to get just the
6102 running-routers line, not the whole descriptor list. (But
6103 clients don't use this yet.)
6104 - When people mistakenly use Tor as an http proxy, point them
6105 at the tor-doc.html rather than the INSTALL.
6106 - Remove our mostly unused -- and broken -- hex_encode()
6107 function. Use base16_encode() instead. (Thanks to Timo Lindfors
6108 for pointing out this bug.)
6109 - Rotate onion keys every 12 hours, not every 2 hours, so we have
6110 fewer problems with people using the wrong key.
6111 - Change the default exit policy to reject the default edonkey,
6112 kazaa, gnutella ports.
6113 - Add replace_file() to util.[ch] to handle win32's rename().
6115 o Changes from 0.0.8preX:
6116 - Fix two bugs in saving onion keys to disk when rotating, so
6117 hopefully we'll get fewer people using old onion keys.
6118 - Fix an assert error that was making SocksPolicy not work.
6119 - Be willing to expire routers that have an open dirport -- it's
6120 just the authoritative dirservers we want to not forget.
6121 - Reject tor-resolve requests for .onion addresses early, so we
6122 don't build a whole rendezvous circuit and then fail.
6123 - When you're warning a server that he's unverified, don't cry
6125 - Fix a race condition: don't try to extend onto a connection
6126 that's still handshaking.
6127 - For servers in clique mode, require the conn to be open before
6128 you'll choose it for your path.
6129 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
6130 end relay cell, etc.
6131 - Measure bandwidth capacity over the last 24 hours, not just 12
6132 - Bugfix: authoritative dirservers were making and signing a new
6133 directory for each client, rather than reusing the cached one.
6136 Changes in version 0.0.8pre2 - 2004-08-04
6137 o Changes from 0.0.7.2:
6139 - Check directory signature _before_ you decide whether you're
6140 you're running an obsolete version and should exit.
6141 - Check directory signature _before_ you parse the running-routers
6142 list to decide who's running or verified.
6143 - Bugfixes and features:
6144 - Check return value of fclose while writing to disk, so we don't
6145 end up with broken files when servers run out of disk space.
6146 - Log a warning if the user uses an unsafe socks variant, so people
6147 are more likely to learn about privoxy or socat.
6148 - Dirservers now include RFC1123-style dates in the HTTP headers,
6149 which one day we will use to better detect clock skew.
6151 o Changes from 0.0.8pre1:
6152 - Make it compile without warnings again on win32.
6153 - Log a warning if you're running an unverified server, to let you
6154 know you might want to get it verified.
6155 - Only pick a default nickname if you plan to be a server.
6158 Changes in version 0.0.8pre1 - 2004-07-23
6160 - Made our unit tests compile again on OpenBSD 3.5, and tor
6161 itself compile again on OpenBSD on a sparc64.
6162 - We were neglecting milliseconds when logging on win32, so
6163 everything appeared to happen at the beginning of each second.
6166 - 'Extend' relay cell payloads now include the digest of the
6167 intended next hop's identity key. Now we can verify that we're
6168 extending to the right router, and also extend to routers we
6169 hadn't heard of before.
6172 - Tor nodes can now act as relays (with an advertised ORPort)
6173 without being manually verified by the dirserver operators.
6174 - Uploaded descriptors of unverified routers are now accepted
6175 by the dirservers, and included in the directory.
6176 - Verified routers are listed by nickname in the running-routers
6177 list; unverified routers are listed as "$<fingerprint>".
6178 - We now use hash-of-identity-key in most places rather than
6179 nickname or addr:port, for improved security/flexibility.
6180 - To avoid Sybil attacks, paths still use only verified servers.
6181 But now we have a chance to play around with hybrid approaches.
6182 - Nodes track bandwidth usage to estimate capacity (not used yet).
6183 - ClientOnly option for nodes that never want to become servers.
6184 - Directory caching.
6185 - "AuthoritativeDir 1" option for the official dirservers.
6186 - Now other nodes (clients and servers) will cache the latest
6187 directory they've pulled down.
6188 - They can enable their DirPort to serve it to others.
6189 - Clients will pull down a directory from any node with an open
6190 DirPort, and check the signature/timestamp correctly.
6191 - Authoritative dirservers now fetch directories from other
6192 authdirservers, to stay better synced.
6193 - Running-routers list tells who's down also, along with noting
6194 if they're verified (listed by nickname) or unverified (listed
6196 - Allow dirservers to serve running-router list separately.
6197 This isn't used yet.
6198 - ORs connect-on-demand to other ORs
6199 - If you get an extend cell to an OR you're not connected to,
6200 connect, handshake, and forward the create cell.
6201 - The authoritative dirservers stay connected to everybody,
6202 and everybody stays connected to 0.0.7 servers, but otherwise
6203 clients/servers expire unused connections after 5 minutes.
6204 - When servers get a sigint, they delay 30 seconds (refusing new
6205 connections) then exit. A second sigint causes immediate exit.
6206 - File and name management:
6207 - Look for .torrc if no CONFDIR "torrc" is found.
6208 - If no datadir is defined, then choose, make, and secure ~/.tor
6210 - If torrc not found, exitpolicy reject *:*.
6211 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
6212 - If no nickname is defined, derive default from hostname.
6213 - Rename secret key files, e.g. identity.key -> secret_id_key,
6214 to discourage people from mailing their identity key to tor-ops.
6215 - Refuse to build a circuit before the directory has arrived --
6216 it won't work anyway, since you won't know the right onion keys
6218 - Try other dirservers immediately if the one you try is down. This
6219 should tolerate down dirservers better now.
6220 - Parse tor version numbers so we can do an is-newer-than check
6221 rather than an is-in-the-list check.
6222 - New socks command 'resolve', to let us shim gethostbyname()
6224 - A 'tor_resolve' script to access the socks resolve functionality.
6225 - A new socks-extensions.txt doc file to describe our
6226 interpretation and extensions to the socks protocols.
6227 - Add a ContactInfo option, which gets published in descriptor.
6228 - Publish OR uptime in descriptor (and thus in directory) too.
6229 - Write tor version at the top of each log file
6230 - New docs in the tarball:
6232 - Document that you should proxy your SSL traffic too.
6235 Changes in version 0.0.7.2 - 2004-07-07
6236 o A better fix for the 0.0.0.0 problem, that will hopefully
6237 eliminate the remaining related assertion failures.
6240 Changes in version 0.0.7.1 - 2004-07-04
6241 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
6242 since internally we use 0.0.0.0 to signify "not yet resolved".
6245 Changes in version 0.0.7 - 2004-06-07
6246 o Updated the man page to reflect the new features.
6249 Changes in version 0.0.7rc2 - 2004-06-06
6250 o Changes from 0.0.7rc1:
6251 - Make it build on Win32 again.
6252 o Changes from 0.0.6.2:
6253 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
6257 Changes in version 0.0.7rc1 - 2004-06-02
6259 - On sighup, we were adding another log without removing the first
6260 one. So log messages would get duplicated n times for n sighups.
6261 - Several cases of using a connection after we'd freed it. The
6262 problem was that connections that are pending resolve are in both
6263 the pending_resolve tree, and also the circuit's resolving_streams
6264 list. When you want to remove one, you must remove it from both.
6265 - Fix a double-mark-for-close where an end cell arrived for a
6266 resolving stream, and then the resolve failed.
6267 - Check directory signatures based on name of signer, not on whom
6268 we got the directory from. This will let us cache directories more
6271 - Crank up some of our constants to handle more users.
6274 Changes in version 0.0.7pre1 - 2004-06-02
6275 o Fixes for crashes and other obnoxious bugs:
6276 - Fix an epipe bug: sometimes when directory connections failed
6277 to connect, we would give them a chance to flush before closing
6279 - When we detached from a circuit because of resolvefailed, we
6280 would immediately try the same circuit twice more, and then
6281 give up on the resolve thinking we'd tried three different
6283 - Limit the number of intro circuits we'll attempt to build for a
6284 hidden service per 15-minute period.
6285 - Check recommended-software string *early*, before actually parsing
6286 the directory. Thus we can detect an obsolete version and exit,
6287 even if the new directory format doesn't parse.
6288 o Fixes for security bugs:
6289 - Remember which nodes are dirservers when you startup, and if a
6290 random OR enables his dirport, don't automatically assume he's
6291 a trusted dirserver.
6293 - Directory connections were asking the wrong poll socket to
6294 start writing, and not asking themselves to start writing.
6295 - When we detached from a circuit because we sent a begin but
6296 didn't get a connected, we would use it again the first time;
6297 but after that we would correctly switch to a different one.
6298 - Stop warning when the first onion decrypt attempt fails; they
6299 will sometimes legitimately fail now that we rotate keys.
6300 - Override unaligned-access-ok check when $host_cpu is ia64 or
6301 arm. Apparently they allow it but the kernel whines.
6302 - Dirservers try to reconnect periodically too, in case connections
6304 - Fix some memory leaks in directory servers.
6305 - Allow backslash in Win32 filenames.
6306 - Made Tor build complain-free on FreeBSD, hopefully without
6307 breaking other BSD builds. We'll see.
6309 - Doxygen markup on all functions and global variables.
6310 - Make directory functions update routerlist, not replace it. So
6311 now directory disagreements are not so critical a problem.
6312 - Remove the upper limit on number of descriptors in a dirserver's
6313 directory (not that we were anywhere close).
6314 - Allow multiple logfiles at different severity ranges.
6315 - Allow *BindAddress to specify ":port" rather than setting *Port
6316 separately. Allow multiple instances of each BindAddress config
6317 option, so you can bind to multiple interfaces if you want.
6318 - Allow multiple exit policy lines, which are processed in order.
6319 Now we don't need that huge line with all the commas in it.
6320 - Enable accept/reject policies on SOCKS connections, so you can bind
6321 to 0.0.0.0 but still control who can use your OP.
6324 Changes in version 0.0.6.2 - 2004-05-16
6325 o Our integrity-checking digest was checking only the most recent cell,
6326 not the previous cells like we'd thought.
6327 Thanks to Stefan Mark for finding the flaw!
6330 Changes in version 0.0.6.1 - 2004-05-06
6331 o Fix two bugs in our AES counter-mode implementation (this affected
6332 onion-level stream encryption, but not TLS-level). It turns
6333 out we were doing something much more akin to a 16-character
6334 polyalphabetic cipher. Oops.
6335 Thanks to Stefan Mark for finding the flaw!
6336 o Retire moria3 as a directory server, and add tor26 as a directory
6340 Changes in version 0.0.6 - 2004-05-02
6344 Changes in version 0.0.6rc4 - 2004-05-01
6345 o Update the built-in dirservers list to use the new directory format
6346 o Fix a rare seg fault: if a node offering a hidden service attempts
6347 to build a circuit to Alice's rendezvous point and fails before it
6348 reaches the last hop, it retries with a different circuit, but
6350 o Handle windows socket errors correctly.
6353 Changes in version 0.0.6rc3 - 2004-04-28
6354 o Don't expire non-general excess circuits (if we had enough
6355 circuits open, we were expiring rendezvous circuits -- even
6356 when they had a stream attached. oops.)
6357 o Fetch randomness from /dev/urandom better (not via fopen/fread)
6358 o Better debugging for tls errors
6359 o Some versions of openssl have an SSL_pending function that erroneously
6360 returns bytes when there is a non-application record pending.
6361 o Set Content-Type on the directory and hidserv descriptor.
6362 o Remove IVs from cipher code, since AES-ctr has none.
6363 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
6364 o We were using an array of length zero in a few places.
6365 o win32's gethostbyname can't resolve an IP to an IP.
6366 o win32's close can't close a socket.
6369 Changes in version 0.0.6rc2 - 2004-04-26
6370 o Fix a bug where we were closing tls connections intermittently.
6371 It turns out openssl keeps its errors around -- so if an error
6372 happens, and you don't ask about it, and then another openssl
6373 operation happens and succeeds, and you ask if there was an error,
6374 it tells you about the first error. Fun fun.
6375 o Fix a bug that's been lurking since 27 may 03 (!)
6376 When passing back a destroy cell, we would use the wrong circ id.
6377 'Mostly harmless', but still worth fixing.
6378 o Since we don't support truncateds much, don't bother sending them;
6379 just close the circ.
6380 o check for <machine/limits.h> so we build on NetBSD again (I hope).
6381 o don't crash if a conn that sent a begin has suddenly lost its circuit
6382 (this was quite rare).
6385 Changes in version 0.0.6rc1 - 2004-04-25
6386 o We now rotate link (tls context) keys and onion keys.
6387 o CREATE cells now include oaep padding, so you can tell
6388 if you decrypted them correctly.
6389 o Add bandwidthburst to server descriptor.
6390 o Directories now say which dirserver signed them.
6391 o Use a tor_assert macro that logs failed assertions too.
6394 Changes in version 0.0.6pre5 - 2004-04-18
6395 o changes from 0.0.6pre4:
6396 - make tor build on broken freebsd 5.2 installs
6397 - fix a failed assert when you try an intro point, get a nack, and try
6398 a second one and it works.
6399 - when alice uses a port that the hidden service doesn't accept,
6400 it now sends back an end cell (denied by exit policy). otherwise
6401 alice would just have to wait to time out.
6402 - fix another rare bug: when we had tried all the intro
6403 points for a hidden service, we fetched the descriptor
6404 again, but we left our introcirc thinking it had already
6405 sent an intro, so it kept waiting for a response...
6406 - bugfix: when you sleep your hidden-service laptop, as soon
6407 as it wakes up it tries to upload a service descriptor, but
6408 socketpair fails for some reason (localhost not up yet?).
6409 now we simply give up on that upload, and we'll try again later.
6410 i'd still like to find the bug though.
6411 - if an intro circ waiting for an ack dies before getting one, then
6413 - we were reusing stale service descriptors and refetching usable
6417 Changes in version 0.0.6pre4 - 2004-04-14
6418 o changes from 0.0.6pre3:
6419 - when bob fails to connect to the rendezvous point, and his
6420 circ didn't fail because of the rendezvous point itself, then
6421 he retries a couple of times
6422 - we expire introduction and rendezvous circs more thoroughly
6423 (sometimes they were hanging around forever)
6424 - we expire unattached rendezvous streams that have been around
6425 too long (they were sticking around forever).
6426 - fix a measly fencepost error that was crashing everybody with
6430 Changes in version 0.0.6pre3 - 2004-04-14
6431 o changes from 0.0.6pre2:
6432 - make hup work again
6433 - fix some memory leaks for dirservers
6434 - allow more skew in rendezvous descriptor timestamps, to help
6435 handle people like blanu who don't know what time it is
6436 - normal circs are 3 hops, but some rend/intro circs are 4, if
6437 the initiator doesn't get to choose the last hop
6438 - send acks for introductions, so alice can know whether to try
6440 - bob publishes intro points more correctly
6441 o changes from 0.0.5:
6442 - fix an assert trigger that's been plaguing us since the days
6443 of 0.0.2prexx (thanks weasel!)
6444 - retry stream correctly when we fail to connect because of
6445 exit-policy-reject (should try another) or can't-resolve-address
6446 (also should try another, because dns on random internet servers
6448 - when we hup a dirserver and we've *removed* a server from the
6449 approved-routers list, now we remove that server from the
6450 in-memory directories too
6453 Changes in version 0.0.6pre2 - 2004-04-08
6454 o We fixed our base32 implementation. Now it works on all architectures.
6457 Changes in version 0.0.6pre1 - 2004-04-08
6459 - Hidden services and rendezvous points are implemented. Go to
6460 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
6461 hidden services. (This only works via a socks4a proxy such as
6462 Privoxy, and currently it's quite slow.)
6465 Changes in version 0.0.5 - 2004-03-30
6469 Changes in version 0.0.5rc3 - 2004-03-29
6470 o Install torrc as torrc.sample -- we no longer clobber your
6472 o Re-enable recommendedversion checking (we broke it in rc2, oops)
6473 o Add in a 'notice' log level for things the operator should hear
6474 but that aren't warnings
6477 Changes in version 0.0.5rc2 - 2004-03-29
6478 o Hold socks connection open until reply is flushed (if possible)
6479 o Make exit nodes resolve IPs to IPs immediately, rather than asking
6480 the dns farm to do it.
6481 o Fix c99 aliasing warnings in rephist.c
6482 o Don't include server descriptors that are older than 24 hours in the
6484 o Give socks 'reject' replies their whole 15s to attempt to flush,
6485 rather than seeing the 60s timeout and assuming the flush had failed.
6486 o Clean automake droppings from the cvs repository
6489 Changes in version 0.0.5rc1 - 2004-03-28
6490 o Fix mangled-state bug in directory fetching (was causing sigpipes).
6491 o Only build circuits after we've fetched the directory: clients were
6492 using only the directory servers before they'd fetched a directory.
6493 This also means longer startup time; so it goes.
6494 o Fix an assert trigger where an OP would fail to handshake, and we'd
6495 expect it to have a nickname.
6496 o Work around a tsocks bug: do a socks reject when AP connection dies
6497 early, else tsocks goes into an infinite loop.
6500 Changes in version 0.0.4 - 2004-03-26
6501 o When connecting to a dirserver or OR and the network is down,
6505 Changes in version 0.0.3 - 2004-03-26
6506 o Warn and fail if server chose a nickname with illegal characters
6507 o Port to Solaris and Sparc:
6508 - include missing header fcntl.h
6509 - have autoconf find -lsocket -lnsl automatically
6510 - deal with hardware word alignment
6511 - make uname() work (solaris has a different return convention)
6512 - switch from using signal() to sigaction()
6513 o Preliminary work on reputation system:
6514 - Keep statistics on success/fail of connect attempts; they're published
6515 by kill -USR1 currently.
6516 - Add a RunTesting option to try to learn link state by creating test
6517 circuits, even when SocksPort is off.
6518 - Remove unused open circuits when there are too many.
6521 Changes in version 0.0.2 - 2004-03-19
6522 - Include strlcpy and strlcat for safer string ops
6523 - define INADDR_NONE so we compile (but still not run) on solaris
6526 Changes in version 0.0.2pre27 - 2004-03-14
6528 - Allow internal tor networks (we were rejecting internal IPs,
6529 now we allow them if they're set explicitly).
6530 - And fix a few endian issues.
6533 Changes in version 0.0.2pre26 - 2004-03-14
6535 - If a stream times out after 15s without a connected cell, don't
6536 try that circuit again: try a new one.
6537 - Retry streams at most 4 times. Then give up.
6538 - When a dirserver gets a descriptor from an unknown router, it
6539 logs its fingerprint (so the dirserver operator can choose to
6540 accept it even without mail from the server operator).
6541 - Inform unapproved servers when we reject their descriptors.
6542 - Make tor build on Windows again. It works as a client, who knows
6544 - Clearer instructions in the torrc for how to set up a server.
6545 - Be more efficient about reading fd's when our global token bucket
6546 (used for rate limiting) becomes empty.
6548 - Stop asserting that computers always go forward in time. It's
6550 - When we sent a cell (e.g. destroy) and then marked an OR connection
6551 expired, we might close it before finishing a flush if the other
6552 side isn't reading right then.
6553 - Don't allow dirservers to start if they haven't defined
6555 - We were caching transient dns failures. Oops.
6556 - Prevent servers from publishing an internal IP as their address.
6557 - Address a strcat vulnerability in circuit.c
6560 Changes in version 0.0.2pre25 - 2004-03-04
6562 - Put the OR's IP in its router descriptor, not its fqdn. That way
6563 we'll stop being stalled by gethostbyname for nodes with flaky dns,
6566 - If the user typed in an address that didn't resolve, the server
6570 Changes in version 0.0.2pre24 - 2004-03-03
6572 - Fix an assertion failure in dns.c, where we were trying to dequeue
6573 a pending dns resolve even if it wasn't pending
6574 - Fix a spurious socks5 warning about still trying to write after the
6575 connection is finished.
6576 - Hold certain marked_for_close connections open until they're finished
6577 flushing, rather than losing bytes by closing them too early.
6578 - Correctly report the reason for ending a stream
6579 - Remove some duplicate calls to connection_mark_for_close
6580 - Put switch_id and start_daemon earlier in the boot sequence, so it
6581 will actually try to chdir() to options.DataDirectory
6582 - Make 'make test' exit(1) if a test fails; fix some unit tests
6583 - Make tor fail when you use a config option it doesn't know about,
6584 rather than warn and continue.
6585 - Make --version work
6586 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
6589 Changes in version 0.0.2pre23 - 2004-02-29
6591 - Print a statement when the first circ is finished, so the user
6593 - If a relay cell is unrecognized at the end of the circuit,
6594 send back a destroy. (So attacks to mutate cells are more
6596 - New config option 'excludenodes' to avoid certain nodes for circuits.
6597 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
6598 so you can collect coredumps there.
6600 - Fix a bug in tls flushing where sometimes data got wedged and
6601 didn't flush until more data got sent. Hopefully this bug was
6602 a big factor in the random delays we were seeing.
6603 - Make 'connected' cells include the resolved IP, so the client
6604 dns cache actually gets populated.
6605 - Disallow changing from ORPort=0 to ORPort>0 on hup.
6606 - When we time-out on a stream and detach from the circuit, send an
6607 end cell down it first.
6608 - Only warn about an unknown router (in exitnodes, entrynodes,
6609 excludenodes) after we've fetched a directory.
6612 Changes in version 0.0.2pre22 - 2004-02-26
6614 - Servers publish less revealing uname information in descriptors.
6615 - More memory tracking and assertions, to crash more usefully when
6617 - If the default torrc isn't there, just use some default defaults.
6618 Plus provide an internal dirservers file if they don't have one.
6619 - When the user tries to use Tor as an http proxy, give them an http
6620 501 failure explaining that we're a socks proxy.
6621 - Dump a new router.desc on hup, to help confused people who change
6622 their exit policies and then wonder why router.desc doesn't reflect
6624 - Clean up the generic tor.sh init script that we ship with.
6626 - If the exit stream is pending on the resolve, and a destroy arrives,
6627 then the stream wasn't getting removed from the pending list. I
6628 think this was the one causing recent server crashes.
6629 - Use a more robust poll on OSX 10.3, since their poll is flaky.
6630 - When it couldn't resolve any dirservers, it was useless from then on.
6631 Now it reloads the RouterFile (or default dirservers) if it has no
6633 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
6634 many users don't even *have* a /usr/local/sbin/.
6637 Changes in version 0.0.2pre21 - 2004-02-18
6639 - There's a ChangeLog file that actually reflects the changelog.
6640 - There's a 'torify' wrapper script, with an accompanying
6641 tor-tsocks.conf, that simplifies the process of using tsocks for
6642 tor. It even has a man page.
6643 - The tor binary gets installed to sbin rather than bin now.
6644 - Retry streams where the connected cell hasn't arrived in 15 seconds
6645 - Clean up exit policy handling -- get the default out of the torrc,
6646 so we can update it without forcing each server operator to fix
6648 - Allow imaps and pop3s in default exit policy
6650 - Prevent picking middleman nodes as the last node in the circuit
6653 Changes in version 0.0.2pre20 - 2004-01-30
6655 - We now have a deb package, and it's in debian unstable. Go to
6657 - I've split the TotalBandwidth option into BandwidthRate (how many
6658 bytes per second you want to allow, long-term) and
6659 BandwidthBurst (how many bytes you will allow at once before the cap
6660 kicks in). This better token bucket approach lets you, say, set
6661 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
6662 performance while not exceeding your monthly bandwidth quota.
6663 - Push out a tls record's worth of data once you've got it, rather
6664 than waiting until you've read everything waiting to be read. This
6665 may improve performance by pipelining better. We'll see.
6666 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
6667 from failed circuits (if they haven't been connected yet) and attach
6669 - Expire old streams that haven't managed to connect. Some day we'll
6670 have them reattach to new circuits instead.
6673 - Fix several memory leaks that were causing servers to become bloated
6675 - Fix a few very rare assert triggers. A few more remain.
6676 - Setuid to User _before_ complaining about running as root.
6679 Changes in version 0.0.2pre19 - 2004-01-07
6681 - Fix deadlock condition in dns farm. We were telling a child to die by
6682 closing the parent's file descriptor to him. But newer children were
6683 inheriting the open file descriptor from the parent, and since they
6684 weren't closing it, the socket never closed, so the child never read
6685 eof, so he never knew to exit. Similarly, dns workers were holding
6686 open other sockets, leading to all sorts of chaos.
6687 - New cleaner daemon() code for forking and backgrounding.
6688 - If you log to a file, it now prints an entry at the top of the
6689 logfile so you know it's working.
6690 - The onionskin challenge length was 30 bytes longer than necessary.
6691 - Started to patch up the spec so it's not quite so out of date.
6694 Changes in version 0.0.2pre18 - 2004-01-02
6696 - Fix endian issues with the 'integrity' field in the relay header.
6697 - Fix a potential bug where connections in state
6698 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
6701 Changes in version 0.0.2pre17 - 2003-12-30
6703 - Made --debuglogfile (or any second log file, actually) work.
6704 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
6705 adversary could force us into an infinite loop.
6708 - Each onionskin handshake now includes a hash of the computed key,
6709 to prove the server's identity and help perfect forward secrecy.
6710 - Changed cell size from 256 to 512 bytes (working toward compatibility
6712 - Changed cell length to 2 bytes, and moved it to the relay header.
6713 - Implemented end-to-end integrity checking for the payloads of
6715 - Separated streamid from 'recognized' (otherwise circuits will get
6716 messed up when we try to have streams exit from the middle). We
6717 use the integrity-checking to confirm that a cell is addressed to
6719 - Randomize the initial circid and streamid values, so an adversary who
6720 breaks into a node can't learn how many circuits or streams have
6724 Changes in version 0.0.2pre16 - 2003-12-14
6726 - Fixed a bug that made HUP trigger an assert
6727 - Fixed a bug where a circuit that immediately failed wasn't being
6728 counted as a failed circuit in counting retries.
6731 - Now we close the circuit when we get a truncated cell: otherwise we're
6732 open to an anonymity attack where a bad node in the path truncates
6733 the circuit and then we open streams at him.
6734 - Add port ranges to exit policies
6735 - Add a conservative default exit policy
6736 - Warn if you're running tor as root
6737 - on HUP, retry OR connections and close/rebind listeners
6738 - options.EntryNodes: try these nodes first when picking the first node
6739 - options.ExitNodes: if your best choices happen to include any of
6740 your preferred exit nodes, you choose among just those preferred
6742 - options.ExcludedNodes: nodes that are never picked in path building
6745 Changes in version 0.0.2pre15 - 2003-12-03
6746 o Robustness and bugfixes:
6747 - Sometimes clients would cache incorrect DNS resolves, which would
6748 really screw things up.
6749 - An OP that goes offline would slowly leak all its sockets and stop
6751 - A wide variety of bugfixes in exit node selection, exit policy
6752 handling, and processing pending streams when a new circuit is
6754 - Pick nodes for a path only from those the directory says are up
6755 - Choose randomly from all running dirservers, not always the first one
6756 - Increase allowed http header size for directory fetch.
6757 - Stop writing to stderr (if we're daemonized it will be closed).
6758 - Enable -g always, so cores will be more useful to me.
6759 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
6762 - Wrote a man page. It lists commonly used options.
6765 - Change default loglevel to warn.
6766 - Make PidFile default to null rather than littering in your CWD.
6767 - OnionRouter config option is now obsolete. Instead it just checks
6769 - Moved to a single unified torrc file for both clients and servers.
6772 Changes in version 0.0.2pre14 - 2003-11-29
6773 o Robustness and bugfixes:
6774 - Force the admin to make the DataDirectory himself
6775 - to get ownership/permissions right
6776 - so clients no longer make a DataDirectory and then never use it
6777 - fix bug where a client who was offline for 45 minutes would never
6778 pull down a directory again
6779 - fix (or at least hide really well) the dns assert bug that was
6780 causing server crashes
6781 - warnings and improved robustness wrt clockskew for certs
6782 - use the native daemon(3) to daemonize, when available
6783 - exit if bind() fails
6784 - exit if neither socksport nor orport is defined
6785 - include our own tor_timegm (Win32 doesn't have its own)
6786 - bugfix for win32 with lots of connections
6787 - fix minor bias in PRNG
6788 - make dirserver more robust to corrupt cached directory
6791 - Wrote the design document (woo)
6793 o Circuit building and exit policies:
6794 - Circuits no longer try to use nodes that the directory has told them
6796 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
6797 bitcounts (18.0.0.0/8).
6798 - Make AP connections standby for a circuit if no suitable circuit
6799 exists, rather than failing
6800 - Circuits choose exit node based on addr/port, exit policies, and
6801 which AP connections are standing by
6802 - Bump min pathlen from 2 to 3
6803 - Relay end cells have a payload to describe why the stream ended.
6804 - If the stream failed because of exit policy, try again with a new
6806 - Clients have a dns cache to remember resolved addresses.
6807 - Notice more quickly when we have no working circuits
6810 - APPort is now called SocksPort
6811 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
6813 - RecommendedVersions is now a config variable rather than
6814 hardcoded (for dirservers)
6815 - Reloads config on HUP
6816 - Usage info on -h or --help
6817 - If you set User and Group config vars, it'll setu/gid to them.
6820 Changes in version 0.0.2pre13 - 2003-10-19
6821 o General stability:
6822 - SSL_write no longer fails when it returns WANTWRITE and the number
6823 of bytes in the buf has changed by the next SSL_write call.
6824 - Fix segfault fetching directory when network is down
6825 - Fix a variety of minor memory leaks
6826 - Dirservers reload the fingerprints file on HUP, so I don't have
6827 to take down the network when I approve a new router
6828 - Default server config file has explicit Address line to specify fqdn
6831 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
6832 - Make listener connections not ever alloc bufs
6834 o Autoconf improvements:
6835 - don't clobber an external CFLAGS in ./configure
6836 - Make install now works
6837 - create var/lib/tor on make install
6838 - autocreate a tor.sh initscript to help distribs
6839 - autocreate the torrc and sample-server-torrc with correct paths
6841 o Log files and Daemonizing now work:
6842 - If --DebugLogFile is specified, log to it at -l debug
6843 - If --LogFile is specified, use it instead of commandline
6844 - If --RunAsDaemon is set, tor forks and backgrounds on startup