1 Changes in version 0.2.0.27-rc - 2008-06-03
3 - Include an IP-to-country GeoIP file in the tarball, so relays
4 and bridge relays can report sanitized summaries of the usage
8 - Add a "PURPOSE=" argument to "STREAM NEW" events, as suggested by
9 Robert Hogan. Fixes the first part of bug 681.
10 - Make bridge authorities never serve extrainfo docs.
11 - Add support to detect Libevent versions in the 1.4.x series
13 - Fix build on gcc 4.3 with --enable-gcc-warnings set.
14 - Include a new contrib/tor-exit-notice.html file that exit relay
15 operators can put on their website to help reduce abuse queries.
18 - When tunneling an encrypted directory connection, and its first
19 circuit fails do not leave it unattached and ask the controller
20 to deal. Fixes the second part of bug 681.
21 - Make bridge authorities correctly clean extrainfo store from time
25 Changes in version 0.2.0.26-rc - 2008-05-13
26 Tor 0.2.0.26-rc fixes a major security vulnerability caused by a bug
27 in Debian's OpenSSL packages. All users running any 0.2.0.x version
28 should upgrade, whether they're running Debian or not.
30 o Major security fixes:
31 - Use new V3 directory authority keys on the tor26, gabelmoo, and
32 moria1 V3 directory authorities. The old keys were generated with
33 a vulnerable version of Debian's OpenSSL package, and must be
34 considered compromised. Other authorities' keys were not generated
35 with an affected version of OpenSSL.
38 - List authority signatures as "unrecognized" based on DirServer
39 lines, not on cert cache. Bugfix on 0.2.0.x.
42 - Add a new V3AuthUseLegacyKey option to make it easier for
43 authorities to change their identity keys if they have to.
46 Changes in version 0.2.0.25-rc - 2008-04-23
47 Tor 0.2.0.25-rc makes Tor work again on OS X and certain BSDs.
50 - Remember to initialize threading before initializing logging.
51 Otherwise, many BSD-family implementations will crash hard on
52 startup. Fixes bug 671. Bugfix on 0.2.0.24-rc.
55 - Authorities correctly free policies on bad servers on
56 exit. Fixes bug 672. Bugfix on 0.2.0.x.
59 Changes in version 0.2.0.24-rc - 2008-04-22
60 Tor 0.2.0.24-rc adds dizum (run by Alex de Joode) as the new sixth
61 v3 directory authority, makes relays with dynamic IP addresses and no
62 DirPort notice more quickly when their IP address changes, fixes a few
63 rare crashes and memory leaks, and fixes a few other miscellaneous bugs.
65 o New directory authorities:
66 - Take lefkada out of the list of v3 directory authorities, since
67 it has been down for months.
68 - Set up dizum (run by Alex de Joode) as the new sixth v3 directory
72 - Detect address changes more quickly on non-directory mirror
73 relays. Bugfix on 0.2.0.18-alpha; fixes bug 652.
75 o Minor features (security):
76 - Reject requests for reverse-dns lookup of names that are in
77 a private address space. Patch from lodger.
78 - Non-exit relays no longer allow DNS requests. Fixes bug 619. Patch
81 o Minor bugfixes (crashes):
82 - Avoid a rare assert that can trigger when Tor doesn't have much
83 directory information yet and it tries to fetch a v2 hidden
84 service descriptor. Fixes bug 651, reported by nwf.
85 - Initialize log mutex before initializing dmalloc. Otherwise,
86 running with dmalloc would crash. Bugfix on 0.2.0.x-alpha.
87 - Use recursive pthread mutexes in order to avoid deadlock when
88 logging debug-level messages to a controller. Bug spotted by nwf,
89 bugfix on 0.2.0.16-alpha.
91 o Minor bugfixes (resource management):
92 - Keep address policies from leaking memory: start their refcount
93 at 1, not 2. Bugfix on 0.2.0.16-alpha.
94 - Free authority certificates on exit, so they don't look like memory
95 leaks. Bugfix on 0.2.0.19-alpha.
96 - Free static hashtables for policy maps and for TLS connections on
97 shutdown, so they don't look like memory leaks. Bugfix on 0.2.0.x.
98 - Avoid allocating extra space when computing consensuses on 64-bit
99 platforms. Bug spotted by aakova.
101 o Minor bugfixes (misc):
102 - Do not read the configuration file when we've only been told to
103 generate a password hash. Fixes bug 643. Bugfix on 0.0.9pre5. Fix
104 based on patch from Sebastian Hahn.
105 - Exit relays that are used as a client can now reach themselves
106 using the .exit notation, rather than just launching an infinite
107 pile of circuits. Fixes bug 641. Reported by Sebastian Hahn.
108 - When attempting to open a logfile fails, tell us why.
109 - Fix a dumb bug that was preventing us from knowing that we should
110 preemptively build circuits to handle expected directory requests.
111 Fixes bug 660. Bugfix on 0.1.2.x.
112 - Warn less verbosely about clock skew from netinfo cells from
113 untrusted sources. Fixes bug 663.
114 - Make controller stream events for DNS requests more consistent,
115 by adding "new stream" events for DNS requests, and removing
116 spurious "stream closed" events" for cached reverse resolves.
117 Patch from mwenge. Fixes bug 646.
118 - Correctly notify one-hop connections when a circuit build has
119 failed. Possible fix for bug 669. Found by lodger.
122 Changes in version 0.2.0.23-rc - 2008-03-24
123 Tor 0.2.0.23-rc is the fourth release candidate for the 0.2.0 series. It
124 makes bootstrapping faster if the first directory mirror you contact
125 is down. The bundles also include the new Vidalia 0.1.2 release.
128 - When a tunneled directory request is made to a directory server
129 that's down, notice after 30 seconds rather than 120 seconds. Also,
130 fail any begindir streams that are pending on it, so they can
131 retry elsewhere. This was causing multi-minute delays on bootstrap.
134 Changes in version 0.2.0.22-rc - 2008-03-18
135 Tor 0.2.0.22-rc is the third release candidate for the 0.2.0 series. It
136 enables encrypted directory connections by default for non-relays, fixes
137 some broken TLS behavior we added in 0.2.0.20-rc, and resolves many
138 other bugs. The bundles also include Vidalia 0.1.1 and Torbutton 1.1.17.
141 - Enable encrypted directory connections by default for non-relays,
142 so censor tools that block Tor directory connections based on their
143 plaintext patterns will no longer work. This means Tor works in
144 certain censored countries by default again.
147 - Make sure servers always request certificates from clients during
148 TLS renegotiation. Reported by lodger; bugfix on 0.2.0.20-rc.
149 - Do not enter a CPU-eating loop when a connection is closed in
150 the middle of client-side TLS renegotiation. Fixes bug 622. Bug
151 diagnosed by lodger; bugfix on 0.2.0.20-rc.
152 - Fix assertion failure that could occur when a blocked circuit
153 became unblocked, and it had pending client DNS requests. Bugfix
154 on 0.2.0.1-alpha. Fixes bug 632.
156 o Minor bugfixes (on 0.1.2.x):
157 - Generate "STATUS_SERVER" events rather than misspelled
158 "STATUS_SEVER" events. Caught by mwenge.
159 - When counting the number of bytes written on a TLS connection,
160 look at the BIO actually used for writing to the network, not
161 at the BIO used (sometimes) to buffer data for the network.
162 Looking at different BIOs could result in write counts on the
163 order of ULONG_MAX. Fixes bug 614.
164 - On Windows, correctly detect errors when listing the contents of
165 a directory. Fix from lodger.
167 o Minor bugfixes (on 0.2.0.x):
168 - Downgrade "sslv3 alert handshake failure" message to INFO.
169 - If we set RelayBandwidthRate and RelayBandwidthBurst very high but
170 left BandwidthRate and BandwidthBurst at the default, we would be
171 silently limited by those defaults. Now raise them to match the
172 RelayBandwidth* values.
173 - Fix the SVK version detection logic to work correctly on a branch.
174 - Make --enable-openbsd-malloc work correctly on Linux with alpha
176 - Logging functions now check that the passed severity is sane.
177 - Use proper log levels in the testsuite call of
178 get_interface_address6().
179 - When using a nonstandard malloc, do not use the platform values for
180 HAVE_MALLOC_GOOD_SIZE or HAVE_MALLOC_USABLE_SIZE.
181 - Make the openbsd malloc code use 8k pages on alpha CPUs and
183 - Detect mismatched page sizes when using --enable-openbsd-malloc.
184 - Avoid double-marked-for-close warning when certain kinds of invalid
185 .in-addr.arpa addresses are passed to the DNSPort. Part of a fix
186 for bug 617. Bugfix on 0.2.0.1-alpha.
187 - Make sure that the "NULL-means-reject *:*" convention is followed by
188 all the policy manipulation functions, avoiding some possible crash
189 bugs. Bug found by lodger. Bugfix on 0.2.0.16-alpha.
190 - Fix the implementation of ClientDNSRejectInternalAddresses so that it
191 actually works, and doesn't warn about every single reverse lookup.
192 Fixes the other part of bug 617. Bugfix on 0.2.0.1-alpha.
195 - Only log guard node status when guard node status has changed.
196 - Downgrade the 3 most common "INFO" messages to "DEBUG". This will
197 make "INFO" 75% less verbose.
200 Changes in version 0.2.0.21-rc - 2008-03-02
201 Tor 0.2.0.21-rc is the second release candidate for the 0.2.0 series. It
202 makes Tor work well with Vidalia again, fixes a rare assert bug,
203 and fixes a pair of more minor bugs. The bundles also include Vidalia
204 0.1.0 and Torbutton 1.1.16.
207 - The control port should declare that it requires password auth
208 when HashedControlSessionPassword is set too. Patch from Matt Edman;
209 bugfix on 0.2.0.20-rc. Fixes bug 615.
210 - Downgrade assert in connection_buckets_decrement() to a log message.
211 This may help us solve bug 614, and in any case will make its
212 symptoms less severe. Bugfix on 0.2.0.20-rc. Reported by fredzupy.
213 - We were sometimes miscounting the number of bytes read from the
214 network, causing our rate limiting to not be followed exactly.
215 Bugfix on 0.2.0.16-alpha. Reported by lodger.
218 - Fix compilation with OpenSSL 0.9.8 and 0.9.8a. All other supported
219 OpenSSL versions should have been working fine. Diagnosis and patch
220 from lodger, Karsten Loesing and Sebastian Hahn. Fixes bug 616.
221 Bugfix on 0.2.0.20-rc.
224 Changes in version 0.2.0.20-rc - 2008-02-24
225 Tor 0.2.0.20-rc is the first release candidate for the 0.2.0 series. It
226 makes more progress towards normalizing Tor's TLS handshake, makes
227 hidden services work better again, helps relays bootstrap if they don't
228 know their IP address, adds optional support for linking in openbsd's
229 allocator or tcmalloc, allows really fast relays to scale past 15000
230 sockets, and fixes a bunch of minor bugs reported by Veracode.
233 - Enable the revised TLS handshake based on the one designed by
234 Steven Murdoch in proposal 124, as revised in proposal 130. It
235 includes version negotiation for OR connections as described in
236 proposal 105. The new handshake is meant to be harder for censors
237 to fingerprint, and it adds the ability to detect certain kinds of
238 man-in-the-middle traffic analysis attacks. The version negotiation
239 feature will allow us to improve Tor's link protocol more safely
241 - Choose which bridge to use proportional to its advertised bandwidth,
242 rather than uniformly at random. This should speed up Tor for
243 bridge users. Also do this for people who set StrictEntryNodes.
244 - When a TrackHostExits-chosen exit fails too many times in a row,
245 stop using it. Bugfix on 0.1.2.x; fixes bug 437.
248 - Resolved problems with (re-)fetching hidden service descriptors.
249 Patch from Karsten Loesing; fixes problems with 0.2.0.18-alpha
251 - If we only ever used Tor for hidden service lookups or posts, we
252 would stop building circuits and start refusing connections after
253 24 hours, since we falsely believed that Tor was dormant. Reported
254 by nwf; bugfix on 0.1.2.x.
255 - Servers that don't know their own IP address should go to the
256 authorities for their first directory fetch, even if their DirPort
257 is off or if they don't know they're reachable yet. This will help
258 them bootstrap better. Bugfix on 0.2.0.18-alpha; fixes bug 609.
259 - When counting the number of open sockets, count not only the number
260 of sockets we have received from the socket() call, but also
261 the number we've gotten from accept() and socketpair(). This bug
262 made us fail to count all sockets that we were using for incoming
263 connections. Bugfix on 0.2.0.x.
264 - Fix code used to find strings within buffers, when those strings
265 are not in the first chunk of the buffer. Bugfix on 0.2.0.x.
266 - Fix potential segfault when parsing HTTP headers. Bugfix on 0.2.0.x.
267 - Add a new __HashedControlSessionPassword option for controllers
268 to use for one-off session password hashes that shouldn't get
269 saved to disk by SAVECONF --- Vidalia users were accumulating a
270 pile of HashedControlPassword lines in their torrc files, one for
271 each time they had restarted Tor and then clicked Save. Make Tor
272 automatically convert "HashedControlPassword" to this new option but
273 only when it's given on the command line. Partial fix for bug 586.
275 o Minor features (performance):
276 - Tune parameters for cell pool allocation to minimize amount of
278 - Add OpenBSD malloc code from phk as an optional malloc
279 replacement on Linux: some glibc libraries do very poorly
280 with Tor's memory allocation patterns. Pass
281 --enable-openbsd-malloc to get the replacement malloc code.
282 - Add a --with-tcmalloc option to the configure script to link
283 against tcmalloc (if present). Does not yet search for
284 non-system include paths.
285 - Stop imposing an arbitrary maximum on the number of file descriptors
286 used for busy servers. Bug reported by Olaf Selke; patch from
289 o Minor features (other):
290 - When SafeLogging is disabled, log addresses along with all TLS
292 - When building with --enable-gcc-warnings, check for whether Apple's
293 warning "-Wshorten-64-to-32" is available.
294 - Add a --passphrase-fd argument to the tor-gencert command for
297 o Minor bugfixes (memory leaks and code problems):
298 - We were leaking a file descriptor if Tor started with a zero-length
299 cached-descriptors file. Patch by freddy77; bugfix on 0.1.2.
300 - Detect size overflow in zlib code. Reported by Justin Ferguson and
302 - We were comparing the raw BridgePassword entry with a base64'ed
303 version of it, when handling a "/tor/networkstatus-bridges"
304 directory request. Now compare correctly. Noticed by Veracode.
305 - Recover from bad tracked-since value in MTBF-history file.
307 - Alter the code that tries to recover from unhandled write
308 errors, to not try to flush onto a socket that's given us
309 unhandled errors. Bugfix on 0.1.2.x.
310 - Make Unix controlsockets work correctly on OpenBSD. Patch from
311 tup. Bugfix on 0.2.0.3-alpha.
313 o Minor bugfixes (other):
314 - If we have an extra-info document for our server, always make
315 it available on the control port, even if we haven't gotten
316 a copy of it from an authority yet. Patch from mwenge.
317 - Log the correct memory chunk sizes for empty RAM chunks in mempool.c.
318 - Directory mirrors no longer include a guess at the client's IP
319 address if the connection appears to be coming from the same /24
320 network; it was producing too many wrong guesses.
321 - Make the new hidden service code respect the SafeLogging setting.
322 Bugfix on 0.2.0.x. Patch from Karsten.
323 - When starting as an authority, do not overwrite all certificates
324 cached from other authorities. Bugfix on 0.2.0.x. Fixes bug 606.
325 - If we're trying to flush the last bytes on a connection (for
326 example, when answering a directory request), reset the
327 time-to-give-up timeout every time we manage to write something
328 on the socket. Bugfix on 0.1.2.x.
329 - Change the behavior of "getinfo status/good-server-descriptor"
330 so it doesn't return failure when any authority disappears.
331 - Even though the man page said that "TrackHostExits ." should
332 work, nobody had ever implemented it. Bugfix on 0.1.0.x.
333 - Report TLS "zero return" case as a "clean close" and "IO error"
334 as a "close". Stop calling closes "unexpected closes": existing
335 Tors don't use SSL_close(), so having a connection close without
336 the TLS shutdown handshake is hardly unexpected.
337 - Send NAMESERVER_STATUS messages for a single failed nameserver
340 o Code simplifications and refactoring:
341 - Remove the tor_strpartition function: its logic was confused,
342 and it was only used for one thing that could be implemented far
346 Changes in version 0.2.0.19-alpha - 2008-02-09
347 Tor 0.2.0.19-alpha makes more progress towards normalizing Tor's TLS
348 handshake, makes path selection for relays more secure and IP address
349 guessing more robust, and generally fixes a lot of bugs in preparation
350 for calling the 0.2.0 branch stable.
353 - Do not include recognizeable strings in the commonname part of
354 Tor's x509 certificates.
357 - If we're a relay, avoid picking ourselves as an introduction point,
358 a rendezvous point, or as the final hop for internal circuits. Bug
359 reported by taranis and lodger. Bugfix on 0.1.2.x.
360 - Patch from "Andrew S. Lists" to catch when we contact a directory
361 mirror at IP address X and he says we look like we're coming from
362 IP address X. Bugfix on 0.1.2.x.
364 o Minor features (security):
365 - Be more paranoid about overwriting sensitive memory on free(),
366 as a defensive programming tactic to ensure forward secrecy.
368 o Minor features (directory authority):
369 - Actually validate the options passed to AuthDirReject,
370 AuthDirInvalid, AuthDirBadDir, and AuthDirBadExit.
371 - Reject router descriptors with out-of-range bandwidthcapacity or
372 bandwidthburst values.
374 o Minor features (controller):
375 - Reject controller commands over 1MB in length. This keeps rogue
376 processes from running us out of memory.
378 o Minor features (misc):
379 - Give more descriptive well-formedness errors for out-of-range
380 hidden service descriptor/protocol versions.
381 - Make memory debugging information describe more about history
382 of cell allocation, so we can help reduce our memory use.
384 o Deprecated features (controller):
385 - The status/version/num-versioning and status/version/num-concurring
386 GETINFO options are no longer useful in the v3 directory protocol:
387 treat them as deprecated, and warn when they're used.
390 - When our consensus networkstatus has been expired for a while, stop
391 being willing to build circuits using it. Fixes bug 401. Bugfix
393 - Directory caches now fetch certificates from all authorities
394 listed in a networkstatus consensus, even when they do not
395 recognize them. Fixes bug 571. Bugfix on 0.2.0.x.
396 - When connecting to a bridge without specifying its key, insert
397 the connection into the identity-to-connection map as soon as
398 a key is learned. Fixes bug 574. Bugfix on 0.2.0.x.
399 - Detect versions of OS X where malloc_good_size() is present in the
400 library but never actually declared. Resolves bug 587. Bugfix
402 - Stop incorrectly truncating zlib responses to directory authority
403 signature download requests. Fixes bug 593. Bugfix on 0.2.0.x.
404 - Stop recommending that every server operator send mail to tor-ops.
405 Resolves bug 597. Bugfix on 0.1.2.x.
406 - Don't trigger an assert if we start a directory authority with a
407 private IP address (like 127.0.0.1).
408 - Avoid possible failures when generating a directory with routers
409 with over-long versions strings, or too many flags set. Bugfix
411 - If an attempt to launch a DNS resolve request over the control
412 port fails because we have overrun the limit on the number of
413 connections, tell the controller that the request has failed.
414 - Avoid using too little bandwidth when our clock skips a few
415 seconds. Bugfix on 0.1.2.x.
416 - Fix shell error when warning about missing packages in configure
417 script, on Fedora or Red Hat machines. Bugfix on 0.2.0.x.
418 - Do not become confused when receiving a spurious VERSIONS-like
419 cell from a confused v1 client. Bugfix on 0.2.0.x.
420 - Re-fetch v2 (as well as v0) rendezvous descriptors when all
421 introduction points for a hidden service have failed. Patch from
422 Karsten Loesing. Bugfix on 0.2.0.x.
424 o Code simplifications and refactoring:
425 - Remove some needless generality from cpuworker code, for improved
427 - Stop overloading the circuit_t.onionskin field for both "onionskin
428 from a CREATE cell that we are waiting for a cpuworker to be
429 assigned" and "onionskin from an EXTEND cell that we are going to
430 send to an OR as soon as we are connected". Might help with bug 600.
431 - Add an in-place version of aes_crypt() so that we can avoid doing a
432 needless memcpy() call on each cell payload.
435 Changes in version 0.2.0.18-alpha - 2008-01-25
436 Tor 0.2.0.18-alpha adds a sixth v3 directory authority run by CCC,
437 fixes a big memory leak in 0.2.0.17-alpha, and adds new config options
438 that can warn or reject connections to ports generally associated with
439 vulnerable-plaintext protocols.
441 o New directory authorities:
442 - Set up dannenberg (run by CCC) as the sixth v3 directory
446 - Fix a major memory leak when attempting to use the v2 TLS
447 handshake code. Bugfix on 0.2.0.x; fixes bug 589.
448 - We accidentally enabled the under-development v2 TLS handshake
449 code, which was causing log entries like "TLS error while
450 renegotiating handshake". Disable it again. Resolves bug 590.
451 - We were computing the wrong Content-Length: header for directory
452 responses that need to be compressed on the fly, causing clients
453 asking for those items to always fail. Bugfix on 0.2.0.x; partially
457 - Avoid going directly to the directory authorities even if you're a
458 relay, if you haven't found yourself reachable yet or if you've
459 decided not to advertise your dirport yet. Addresses bug 556.
460 - If we've gone 12 hours since our last bandwidth check, and we
461 estimate we have less than 50KB bandwidth capacity but we could
462 handle more, do another bandwidth test.
463 - New config options WarnPlaintextPorts and RejectPlaintextPorts so
464 Tor can warn and/or refuse connections to ports commonly used with
465 vulnerable-plaintext protocols. Currently we warn on ports 23,
466 109, 110, and 143, but we don't reject any.
469 - When we setconf ClientOnly to 1, close any current OR and Dir
470 listeners. Reported by mwenge.
471 - When we get a consensus that's been signed by more people than
472 we expect, don't log about it; it's not a big deal. Reported
476 - Don't answer "/tor/networkstatus-bridges" directory requests if
477 the request isn't encrypted.
478 - Make "ClientOnly 1" config option disable directory ports too.
479 - Patches from Karsten Loesing to make v2 hidden services more
480 robust: work even when there aren't enough HSDir relays available;
481 retry when a v2 rend desc fetch fails; but don't retry if we
482 already have a usable v0 rend desc.
485 Changes in version 0.2.0.17-alpha - 2008-01-17
486 Tor 0.2.0.17-alpha makes the tarball build cleanly again (whoops).
489 - Make the tor-gencert man page get included correctly in the tarball.
492 Changes in version 0.2.0.16-alpha - 2008-01-17
493 Tor 0.2.0.16-alpha adds a fifth v3 directory authority run by Karsten
494 Loesing, and generally cleans up a lot of features and minor bugs.
496 o New directory authorities:
497 - Set up gabelmoo (run by Karsten Loesing) as the fifth v3 directory
500 o Major performance improvements:
501 - Switch our old ring buffer implementation for one more like that
502 used by free Unix kernels. The wasted space in a buffer with 1mb
503 of data will now be more like 8k than 1mb. The new implementation
504 also avoids realloc();realloc(); patterns that can contribute to
505 memory fragmentation.
508 - Configuration files now accept C-style strings as values. This
509 helps encode characters not allowed in the current configuration
510 file format, such as newline or #. Addresses bug 557.
511 - Although we fixed bug 539 (where servers would send HTTP status 503
512 responses _and_ send a body too), there are still servers out
513 there that haven't upgraded. Therefore, make clients parse such
514 bodies when they receive them.
515 - When we're not serving v2 directory information, there is no reason
516 to actually keep any around. Remove the obsolete files and directory
517 on startup if they are very old and we aren't going to serve them.
519 o Minor performance improvements:
520 - Reference-count and share copies of address policy entries; only 5%
521 of them were actually distinct.
522 - Never walk through the list of logs if we know that no log is
523 interested in a given message.
526 - When an authority has not signed a consensus, do not try to
527 download a nonexistent "certificate with key 00000000". Bugfix
528 on 0.2.0.x. Fixes bug 569.
529 - Fix a rare assert error when we're closing one of our threads:
530 use a mutex to protect the list of logs, so we never write to the
531 list as it's being freed. Bugfix on 0.1.2.x. Fixes the very rare
532 bug 575, which is kind of the revenge of bug 222.
533 - Patch from Karsten Loesing to complain less at both the client
534 and the relay when a relay used to have the HSDir flag but doesn't
535 anymore, and we try to upload a hidden service descriptor.
536 - Stop leaking one cert per TLS context. Fixes bug 582. Bugfix on
538 - Do not try to download missing certificates until we have tried
539 to check our fallback consensus. Fixes bug 583.
540 - Make bridges round reported GeoIP stats info up to the nearest
541 estimate, not down. Now we can distinguish between "0 people from
542 this country" and "1 person from this country".
543 - Avoid a spurious free on base64 failure. Bugfix on 0.1.2.
544 - Avoid possible segfault if key generation fails in
545 crypto_pk_hybrid_encrypt. Bugfix on 0.2.0.
546 - Avoid segfault in the case where a badly behaved v2 versioning
547 directory sends a signed networkstatus with missing client-versions.
549 - Avoid segfaults on certain complex invocations of
550 router_get_by_hexdigest(). Bugfix on 0.1.2.
551 - Correct bad index on array access in parse_http_time(). Bugfix
553 - Fix possible bug in vote generation when server versions are present
554 but client versions are not.
555 - Fix rare bug on REDIRECTSTREAM control command when called with no
556 port set: it could erroneously report an error when none had
558 - Avoid bogus crash-prone, leak-prone tor_realloc when we're
559 compressing large objects and find ourselves with more than 4k
560 left over. Bugfix on 0.2.0.
561 - Fix a small memory leak when setting up a hidden service.
562 - Fix a few memory leaks that could in theory happen under bizarre
564 - Fix an assert if we post a general-purpose descriptor via the
565 control port but that descriptor isn't mentioned in our current
566 network consensus. Bug reported by Jon McLachlan; bugfix on
569 o Minor features (controller):
570 - Get NS events working again. Patch from tup.
571 - The GETCONF command now escapes and quotes configuration values
572 that don't otherwise fit into the torrc file.
573 - The SETCONF command now handles quoted values correctly.
575 o Minor features (directory authorities):
576 - New configuration options to override default maximum number of
577 servers allowed on a single IP address. This is important for
578 running a test network on a single host.
579 - Actually implement the -s option to tor-gencert.
580 - Add a manual page for tor-gencert.
582 o Minor features (bridges):
583 - Bridge authorities no longer serve bridge descriptors over
584 unencrypted connections.
586 o Minor features (other):
587 - Add hidden services and DNSPorts to the list of things that make
588 Tor accept that it has running ports. Change starting Tor with no
589 ports from a fatal error to a warning; we might change it back if
590 this turns out to confuse anybody. Fixes bug 579.
593 Changes in version 0.1.2.19 - 2008-01-17
594 Tor 0.1.2.19 fixes a huge memory leak on exit relays, makes the default
595 exit policy a little bit more conservative so it's safer to run an
596 exit relay on a home system, and fixes a variety of smaller issues.
599 - Exit policies now reject connections that are addressed to a
600 relay's public (external) IP address too, unless
601 ExitPolicyRejectPrivate is turned off. We do this because too
602 many relays are running nearby to services that trust them based
606 - When the clock jumps forward a lot, do not allow the bandwidth
607 buckets to become negative. Fixes bug 544.
608 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
609 on every successful resolve. Reported by Mike Perry.
610 - Purge old entries from the "rephist" database and the hidden
611 service descriptor database even when DirPort is zero.
612 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
613 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
614 crashing or mis-answering these requests.
615 - When we decide to send a 503 response to a request for servers, do
616 not then also send the server descriptors: this defeats the whole
617 purpose. Fixes bug 539.
620 - Changing the ExitPolicyRejectPrivate setting should cause us to
621 rebuild our server descriptor.
622 - Fix handling of hex nicknames when answering controller requests for
623 networkstatus by name, or when deciding whether to warn about
624 unknown routers in a config option. (Patch from mwenge.)
625 - Fix a couple of hard-to-trigger autoconf problems that could result
626 in really weird results on platforms whose sys/types.h files define
627 nonstandard integer types.
628 - Don't try to create the datadir when running --verify-config or
629 --hash-password. Resolves bug 540.
630 - If we were having problems getting a particular descriptor from the
631 directory caches, and then we learned about a new descriptor for
632 that router, we weren't resetting our failure count. Reported
634 - Although we fixed bug 539 (where servers would send HTTP status 503
635 responses _and_ send a body too), there are still servers out there
636 that haven't upgraded. Therefore, make clients parse such bodies
637 when they receive them.
638 - Run correctly on systems where rlim_t is larger than unsigned long.
639 This includes some 64-bit systems.
640 - Run correctly on platforms (like some versions of OS X 10.5) where
641 the real limit for number of open files is OPEN_FILES, not rlim_max
642 from getrlimit(RLIMIT_NOFILES).
643 - Avoid a spurious free on base64 failure.
644 - Avoid segfaults on certain complex invocations of
645 router_get_by_hexdigest().
646 - Fix rare bug on REDIRECTSTREAM control command when called with no
647 port set: it could erroneously report an error when none had
651 Changes in version 0.2.0.15-alpha - 2007-12-25
652 Tor 0.2.0.14-alpha and 0.2.0.15-alpha fix a bunch of bugs with the
653 features added in 0.2.0.13-alpha.
656 - Fix several remotely triggerable asserts based on DirPort requests
657 for a v2 or v3 networkstatus object before we were prepared. This
658 was particularly bad for 0.2.0.13 and later bridge relays, who
659 would never have a v2 networkstatus and would thus always crash
660 when used. Bugfixes on 0.2.0.x.
661 - Estimate the v3 networkstatus size more accurately, rather than
662 estimating it at zero bytes and giving it artificially high priority
663 compared to other directory requests. Bugfix on 0.2.0.x.
666 - Fix configure.in logic for cross-compilation.
667 - When we load a bridge descriptor from the cache, and it was
668 previously unreachable, mark it as retriable so we won't just
669 ignore it. Also, try fetching a new copy immediately. Bugfixes
671 - The bridge GeoIP stats were counting other relays, for example
672 self-reachability and authority-reachability tests.
675 - Support compilation to target iPhone; patch from cjacker huang.
676 To build for iPhone, pass the --enable-iphone option to configure.
679 Changes in version 0.2.0.14-alpha - 2007-12-23
681 - Fix a crash on startup if you install Tor 0.2.0.13-alpha fresh
682 without a datadirectory from a previous Tor install. Reported
684 - Fix a crash when we fetch a descriptor that turns out to be
685 unexpected (it used to be in our networkstatus when we started
686 fetching it, but it isn't in our current networkstatus), and we
687 aren't using bridges. Bugfix on 0.2.0.x.
688 - Fix a crash when accessing hidden services: it would work the first
689 time you use a given introduction point for your service, but
690 on subsequent requests we'd be using garbage memory. Fixed by
691 Karsten Loesing. Bugfix on 0.2.0.13-alpha.
692 - Fix a crash when we load a bridge descriptor from disk but we don't
693 currently have a Bridge line for it in our torrc. Bugfix on
697 - If bridge authorities set BridgePassword, they will serve a
698 snapshot of known bridge routerstatuses from their DirPort to
699 anybody who knows that password. Unset by default.
702 - Make the unit tests build again.
703 - Make "GETINFO/desc-annotations/id/<OR digest>" actually work.
704 - Make PublishServerDescriptor default to 1, so the default doesn't
705 have to change as we invent new directory protocol versions.
706 - Fix test for rlim_t on OSX 10.3: sys/resource.h doesn't want to
707 be included unless sys/time.h is already included. Fixes
708 bug 553. Bugfix on 0.2.0.x.
709 - If we receive a general-purpose descriptor and then receive an
710 identical bridge-purpose descriptor soon after, don't discard
711 the next one as a duplicate.
714 - If BridgeRelay is set to 1, then the default for
715 PublishServerDescriptor is now "bridge" rather than "v2,v3".
716 - If the user sets RelayBandwidthRate but doesn't set
717 RelayBandwidthBurst, then make them equal rather than erroring out.
720 Changes in version 0.2.0.13-alpha - 2007-12-21
721 Tor 0.2.0.13-alpha adds a fourth v3 directory authority run by Geoff
722 Goodell, fixes many more bugs, and adds a lot of infrastructure for
725 o New directory authorities:
726 - Set up lefkada (run by Geoff Goodell) as the fourth v3 directory
730 - Only update guard status (usable / not usable) once we have
731 enough directory information. This was causing us to always pick
732 two new guards on startup (bugfix on 0.2.0.9-alpha), and it was
733 causing us to discard all our guards on startup if we hadn't been
734 running for a few weeks (bugfix on 0.1.2.x). Fixes bug 448.
735 - Purge old entries from the "rephist" database and the hidden
736 service descriptor databases even when DirPort is zero. Bugfix
738 - We were ignoring our RelayBandwidthRate for the first 30 seconds
739 after opening a circuit -- even a relayed circuit. Bugfix on
741 - Stop thinking that 0.1.2.x directory servers can handle "begin_dir"
742 requests. Should ease bugs 406 and 419 where 0.1.2.x relays are
743 crashing or mis-answering these types of requests.
744 - Relays were publishing their server descriptor to v1 and v2
745 directory authorities, but they didn't try publishing to v3-only
746 authorities. Fix this; and also stop publishing to v1 authorities.
748 - When we were reading router descriptors from cache, we were ignoring
749 the annotations -- so for example we were reading in bridge-purpose
750 descriptors as general-purpose descriptors. Bugfix on 0.2.0.8-alpha.
751 - When we decided to send a 503 response to a request for servers, we
752 were then also sending the server descriptors: this defeats the
753 whole purpose. Fixes bug 539; bugfix on 0.1.2.x.
756 - Bridge relays now behave like clients with respect to time
757 intervals for downloading new consensus documents -- otherwise they
758 stand out. Bridge users now wait until the end of the interval,
759 so their bridge relay will be sure to have a new consensus document.
760 - Three new config options (AlternateDirAuthority,
761 AlternateBridgeAuthority, and AlternateHSAuthority) that let the
762 user selectively replace the default directory authorities by type,
763 rather than the all-or-nothing replacement that DirServer offers.
764 - Tor can now be configured to read a GeoIP file from disk in one
765 of two formats. This can be used by controllers to map IP addresses
766 to countries. Eventually, it may support exit-by-country.
767 - When possible, bridge relays remember which countries users
768 are coming from, and report aggregate information in their
769 extra-info documents, so that the bridge authorities can learn
770 where Tor is blocked.
771 - Bridge directory authorities now do reachability testing on the
772 bridges they know. They provide router status summaries to the
773 controller via "getinfo ns/purpose/bridge", and also dump summaries
774 to a file periodically.
775 - Stop fetching directory info so aggressively if your DirPort is
776 on but your ORPort is off; stop fetching v2 dir info entirely.
777 You can override these choices with the new FetchDirInfoEarly
781 - The fix in 0.2.0.12-alpha cleared the "hsdir" flag in v3 network
782 consensus documents when there are too many relays at a single
783 IP address. Now clear it in v2 network status documents too, and
784 also clear it in routerinfo_t when the relay is no longer listed
785 in the relevant networkstatus document.
786 - Don't crash if we get an unexpected value for the
787 PublishServerDescriptor config option. Reported by Matt Edman;
788 bugfix on 0.2.0.9-alpha.
789 - Our new v2 hidden service descriptor format allows descriptors
790 that have no introduction points. But Tor crashed when we tried
791 to build a descriptor with no intro points (and it would have
792 crashed if we had tried to parse one). Bugfix on 0.2.0.x; patch
794 - Fix building with dmalloc 5.5.2 with glibc.
795 - Reject uploaded descriptors and extrainfo documents if they're
796 huge. Otherwise we'll cache them all over the network and it'll
797 clog everything up. Reported by Aljosha Judmayer.
798 - Check for presence of s6_addr16 and s6_addr32 fields in in6_addr
799 via autoconf. Should fix compile on solaris. Bugfix on 0.2.0.x.
800 - When the DANGEROUS_VERSION controller status event told us we're
801 running an obsolete version, it used the string "OLD" to describe
802 it. Yet the "getinfo" interface used the string "OBSOLETE". Now use
803 "OBSOLETE" in both cases. Bugfix on 0.1.2.x.
804 - If we can't expand our list of entry guards (e.g. because we're
805 using bridges or we have StrictEntryNodes set), don't mark relays
806 down when they fail a directory request. Otherwise we're too quick
807 to mark all our entry points down. Bugfix on 0.1.2.x.
808 - Fix handling of hex nicknames when answering controller requests for
809 networkstatus by name, or when deciding whether to warn about unknown
810 routers in a config option. Bugfix on 0.1.2.x. (Patch from mwenge.)
811 - Fix a couple of hard-to-trigger autoconf problems that could result
812 in really weird results on platforms whose sys/types.h files define
813 nonstandard integer types. Bugfix on 0.1.2.x.
814 - Fix compilation with --disable-threads set. Bugfix on 0.2.0.x.
815 - Don't crash on name lookup when we have no current consensus. Fixes
816 bug 538; bugfix on 0.2.0.x.
817 - Only Tors that want to mirror the v2 directory info should
818 create the "cached-status" directory in their datadir. (All Tors
819 used to create it.) Bugfix on 0.2.0.9-alpha.
820 - Directory authorities should only automatically download Extra Info
821 documents if they're v1, v2, or v3 authorities. Bugfix on 0.1.2.x.
824 - On the USR1 signal, when dmalloc is in use, log the top 10 memory
825 consumers. (We already do this on HUP.)
826 - Authorities and caches fetch the v2 networkstatus documents
827 less often, now that v3 is encouraged.
828 - Add a new config option BridgeRelay that specifies you want to
829 be a bridge relay. Right now the only difference is that it makes
830 you answer begin_dir requests, and it makes you cache dir info,
831 even if your DirPort isn't on.
832 - Add "GETINFO/desc-annotations/id/<OR digest>" so controllers can
833 ask about source, timestamp of arrival, purpose, etc. We need
834 something like this to help Vidalia not do GeoIP lookups on bridge
836 - Allow multiple HashedControlPassword config lines, to support
837 multiple controller passwords.
838 - Authorities now decide whether they're authoritative for a given
839 router based on the router's purpose.
840 - New config options AuthDirBadDir and AuthDirListBadDirs for
841 authorities to mark certain relays as "bad directories" in the
842 networkstatus documents. Also supports the "!baddir" directive in
843 the approved-routers file.
846 Changes in version 0.2.0.12-alpha - 2007-11-16
847 This twelfth development snapshot fixes some more build problems as
848 well as a few minor bugs.
851 - Make it build on OpenBSD again. Patch from tup.
852 - Substitute BINDIR and LOCALSTATEDIR in scripts. Fixes
853 package-building for Red Hat, OS X, etc.
855 o Minor bugfixes (on 0.1.2.x):
856 - Changing the ExitPolicyRejectPrivate setting should cause us to
857 rebuild our server descriptor.
859 o Minor bugfixes (on 0.2.0.x):
860 - When we're lacking a consensus, don't try to perform rendezvous
861 operations. Reported by Karsten Loesing.
862 - Fix a small memory leak whenever we decide against using a
863 newly picked entry guard. Reported by Mike Perry.
864 - When authorities detected more than two relays running on the same
865 IP address, they were clearing all the status flags but forgetting
866 to clear the "hsdir" flag. So clients were being told that a
867 given relay was the right choice for a v2 hsdir lookup, yet they
868 never had its descriptor because it was marked as 'not running'
870 - If we're trying to fetch a bridge descriptor and there's no way
871 the bridge authority could help us (for example, we don't know
872 a digest, or there is no bridge authority), don't be so eager to
873 fall back to asking the bridge authority.
874 - If we're using bridges or have strictentrynodes set, and our
875 chosen exit is in the same family as all our bridges/entry guards,
876 then be flexible about families.
879 - When we negotiate a v2 link-layer connection (not yet implemented),
880 accept RELAY_EARLY cells and turn them into RELAY cells if we've
881 negotiated a v1 connection for their next step. Initial code for
885 Changes in version 0.2.0.11-alpha - 2007-11-12
886 This eleventh development snapshot fixes some build problems with
887 the previous snapshot. It also includes a more secure-by-default exit
888 policy for relays, fixes an enormous memory leak for exit relays, and
889 fixes another bug where servers were falling out of the directory list.
892 - Exit policies now reject connections that are addressed to a
893 relay's public (external) IP address too, unless
894 ExitPolicyRejectPrivate is turned off. We do this because too
895 many relays are running nearby to services that trust them based
896 on network address. Bugfix on 0.1.2.x.
899 - Fix a memory leak on exit relays; we were leaking a cached_resolve_t
900 on every successful resolve. Reported by Mike Perry; bugfix
902 - On authorities, never downgrade to old router descriptors simply
903 because they're listed in the consensus. This created a catch-22
904 where we wouldn't list a new descriptor because there was an
905 old one in the consensus, and we couldn't get the new one in the
906 consensus because we wouldn't list it. Possible fix for bug 548.
907 Also, this might cause bug 543 to appear on authorities; if so,
908 we'll need a band-aid for that. Bugfix on 0.2.0.9-alpha.
910 o Packaging fixes on 0.2.0.10-alpha:
911 - We were including instructions about what to do with the
912 src/config/fallback-consensus file, but we weren't actually
913 including it in the tarball. Disable all of that for now.
916 - Allow people to say PreferTunnelledDirConns rather than
917 PreferTunneledDirConns, for those alternate-spellers out there.
920 - Don't reevaluate all the information from our consensus document
921 just because we've downloaded a v2 networkstatus that we intend
922 to cache. Fixes bug 545; bugfix on 0.2.0.x.
925 Changes in version 0.2.0.10-alpha - 2007-11-10
926 This tenth development snapshot adds a third v3 directory authority
927 run by Mike Perry, adds most of Karsten Loesing's new hidden service
928 descriptor format, fixes a bad crash bug and new bridge bugs introduced
929 in 0.2.0.9-alpha, fixes many bugs with the v3 directory implementation,
930 fixes some minor memory leaks in previous 0.2.0.x snapshots, and
931 addresses many more minor issues.
933 o New directory authorities:
934 - Set up ides (run by Mike Perry) as the third v3 directory authority.
937 - Allow tunnelled directory connections to ask for an encrypted
938 "begin_dir" connection or an anonymized "uses a full Tor circuit"
939 connection independently. Now we can make anonymized begin_dir
940 connections for (e.g.) more secure hidden service posting and
942 - More progress on proposal 114: code from Karsten Loesing to
943 implement new hidden service descriptor format.
944 - Raise the default BandwidthRate/BandwidthBurst to 5MB/10MB, to
945 accommodate the growing number of servers that use the default
947 - Directory authorities use a new formula for selecting which nodes
948 to advertise as Guards: they must be in the top 7/8 in terms of
949 how long we have known about them, and above the median of those
950 nodes in terms of weighted fractional uptime.
951 - Make "not enough dir info yet" warnings describe *why* Tor feels
952 it doesn't have enough directory info yet.
955 - Stop servers from crashing if they set a Family option (or
956 maybe in other situations too). Bugfix on 0.2.0.9-alpha; reported
958 - Make bridge users work again -- the move to v3 directories in
959 0.2.0.9-alpha had introduced a number of bugs that made bridges
960 no longer work for clients.
961 - When the clock jumps forward a lot, do not allow the bandwidth
962 buckets to become negative. Bugfix on 0.1.2.x; fixes bug 544.
964 o Major bugfixes (v3 dir, bugfixes on 0.2.0.9-alpha):
965 - When the consensus lists a router descriptor that we previously were
966 mirroring, but that we considered non-canonical, reload the
967 descriptor as canonical. This fixes bug 543 where Tor servers
968 would start complaining after a few days that they don't have
969 enough directory information to build a circuit.
970 - Consider replacing the current consensus when certificates arrive
971 that make the pending consensus valid. Previously, we were only
972 considering replacement when the new certs _didn't_ help.
973 - Fix an assert error on startup if we didn't already have the
974 consensus and certs cached in our datadirectory: we were caching
975 the consensus in consensus_waiting_for_certs but then free'ing it
977 - Avoid sending a request for "keys/fp" (for which we'll get a 400 Bad
978 Request) if we need more v3 certs but we've already got pending
979 requests for all of them.
980 - Correctly back off from failing certificate downloads. Fixes
982 - Authorities don't vote on the Running flag if they have been running
983 for less than 30 minutes themselves. Fixes bug 547, where a newly
984 started authority would vote that everyone was down.
987 - Drop support for OpenSSL version 0.9.6. Just about nobody was using
988 it, it had no AES, and it hasn't seen any security patches since
992 - Clients now hold circuitless TLS connections open for 1.5 times
993 MaxCircuitDirtiness (15 minutes), since it is likely that they'll
994 rebuild a new circuit over them within that timeframe. Previously,
995 they held them open only for KeepalivePeriod (5 minutes).
996 - Use "If-Modified-Since" to avoid retrieving consensus
997 networkstatuses that we already have.
998 - When we have no consensus, check FallbackNetworkstatusFile (defaults
999 to $PREFIX/share/tor/fallback-consensus) for a consensus. This way
1000 we start knowing some directory caches.
1001 - When we receive a consensus from the future, warn about skew.
1002 - Improve skew reporting: try to give the user a better log message
1003 about how skewed they are, and how much this matters.
1004 - When we have a certificate for an authority, believe that
1005 certificate's claims about the authority's IP address.
1006 - New --quiet command-line option to suppress the default console log.
1007 Good in combination with --hash-password.
1008 - Authorities send back an X-Descriptor-Not-New header in response to
1009 an accepted-but-discarded descriptor upload. Partially implements
1011 - Make the log message for "tls error. breaking." more useful.
1012 - Better log messages about certificate downloads, to attempt to
1013 track down the second incarnation of bug 546.
1015 o Minor features (bridges):
1016 - If bridge users set UpdateBridgesFromAuthority, but the digest
1017 they ask for is a 404 from the bridge authority, they now fall
1018 back to trying the bridge directly.
1019 - Bridges now use begin_dir to publish their server descriptor to
1020 the bridge authority, even when they haven't set TunnelDirConns.
1022 o Minor features (controller):
1023 - When reporting clock skew, and we know that the clock is _at least
1024 as skewed_ as some value, but we don't know the actual value,
1025 report the value as a "minimum skew."
1028 - Update linux-tor-prio.sh script to allow QoS based on the uid of
1029 the Tor process. Patch from Marco Bonetti with tweaks from Mike
1033 - Refuse to start if both ORPort and UseBridges are set. Bugfix
1034 on 0.2.0.x, suggested by Matt Edman.
1035 - Don't stop fetching descriptors when FetchUselessDescriptors is
1036 set, even if we stop asking for circuits. Bugfix on 0.1.2.x;
1037 reported by tup and ioerror.
1038 - Better log message on vote from unknown authority.
1039 - Don't log "Launching 0 request for 0 router" message.
1041 o Minor bugfixes (memory leaks):
1042 - Stop leaking memory every time we parse a v3 certificate. Bugfix
1044 - Stop leaking memory every time we load a v3 certificate. Bugfix
1045 on 0.2.0.1-alpha. Fixes Bug 536.
1046 - Stop leaking a cached networkstatus on exit. Bugfix on
1048 - Stop leaking voter information every time we free a consensus.
1049 Bugfix on 0.2.0.3-alpha.
1050 - Stop leaking signed data every time we check a voter signature.
1051 Bugfix on 0.2.0.3-alpha.
1052 - Stop leaking a signature every time we fail to parse a consensus or
1053 a vote. Bugfix on 0.2.0.3-alpha.
1054 - Stop leaking v2_download_status_map on shutdown. Bugfix on
1056 - Stop leaking conn->nickname every time we make a connection to a
1057 Tor relay without knowing its expected identity digest (e.g. when
1058 using bridges). Bugfix on 0.2.0.3-alpha.
1060 - Minor bugfixes (portability):
1061 - Run correctly on platforms where rlim_t is larger than unsigned
1062 long, and/or where the real limit for number of open files is
1063 OPEN_FILES, not rlim_max from getrlimit(RLIMIT_NOFILES). In
1064 particular, these may be needed for OS X 10.5.
1067 Changes in version 0.1.2.18 - 2007-10-28
1068 Tor 0.1.2.18 fixes many problems including crash bugs, problems with
1069 hidden service introduction that were causing huge delays, and a big
1070 bug that was causing some servers to disappear from the network status
1071 lists for a few hours each day.
1073 o Major bugfixes (crashes):
1074 - If a connection is shut down abruptly because of something that
1075 happened inside connection_flushed_some(), do not call
1076 connection_finished_flushing(). Should fix bug 451:
1077 "connection_stop_writing: Assertion conn->write_event failed"
1078 Bugfix on 0.1.2.7-alpha.
1079 - Fix possible segfaults in functions called from
1080 rend_process_relay_cell().
1082 o Major bugfixes (hidden services):
1083 - Hidden services were choosing introduction points uniquely by
1084 hexdigest, but when constructing the hidden service descriptor
1085 they merely wrote the (potentially ambiguous) nickname.
1086 - Clients now use the v2 intro format for hidden service
1087 connections: they specify their chosen rendezvous point by identity
1088 digest rather than by (potentially ambiguous) nickname. These
1089 changes could speed up hidden service connections dramatically.
1091 o Major bugfixes (other):
1092 - Stop publishing a new server descriptor just because we get a
1093 HUP signal. This led (in a roundabout way) to some servers getting
1094 dropped from the networkstatus lists for a few hours each day.
1095 - When looking for a circuit to cannibalize, consider family as well
1096 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
1097 circuit cannibalization).
1098 - When a router wasn't listed in a new networkstatus, we were leaving
1099 the flags for that router alone -- meaning it remained Named,
1100 Running, etc -- even though absence from the networkstatus means
1101 that it shouldn't be considered to exist at all anymore. Now we
1102 clear all the flags for routers that fall out of the networkstatus
1103 consensus. Fixes bug 529.
1106 - Don't try to access (or alter) the state file when running
1107 --list-fingerprint or --verify-config or --hash-password. Resolves
1109 - When generating information telling us how to extend to a given
1110 router, do not try to include the nickname if it is
1111 absent. Resolves bug 467.
1112 - Fix a user-triggerable segfault in expand_filename(). (There isn't
1113 a way to trigger this remotely.)
1114 - When sending a status event to the controller telling it that an
1115 OR address is readable, set the port correctly. (Previously we
1116 were reporting the dir port.)
1117 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
1118 command. Bugfix on 0.1.2.17.
1119 - When loading bandwidth history, do not believe any information in
1120 the future. Fixes bug 434.
1121 - When loading entry guard information, do not believe any information
1123 - When we have our clock set far in the future and generate an
1124 onion key, then re-set our clock to be correct, we should not stop
1125 the onion key from getting rotated.
1126 - On some platforms, accept() can return a broken address. Detect
1127 this more quietly, and deal accordingly. Fixes bug 483.
1128 - It's not actually an error to find a non-pending entry in the DNS
1129 cache when canceling a pending resolve. Don't log unless stuff
1130 is fishy. Resolves bug 463.
1131 - Don't reset trusted dir server list when we set a configuration
1132 option. Patch from Robert Hogan.
1133 - Don't try to create the datadir when running --verify-config or
1134 --hash-password. Resolves bug 540.
1137 Changes in version 0.2.0.9-alpha - 2007-10-24
1138 This ninth development snapshot switches clients to the new v3 directory
1139 system; allows servers to be listed in the network status even when they
1140 have the same nickname as a registered server; and fixes many other
1141 bugs including a big one that was causing some servers to disappear
1142 from the network status lists for a few hours each day.
1144 o Major features (directory system):
1145 - Clients now download v3 consensus networkstatus documents instead
1146 of v2 networkstatus documents. Clients and caches now base their
1147 opinions about routers on these consensus documents. Clients only
1148 download router descriptors listed in the consensus.
1149 - Authorities now list servers who have the same nickname as
1150 a different named server, but list them with a new flag,
1151 "Unnamed". Now we can list servers that happen to pick the same
1152 nickname as a server that registered two years ago and then
1153 disappeared. Partially implements proposal 122.
1154 - If the consensus list a router as "Unnamed", the name is assigned
1155 to a different router: do not identify the router by that name.
1156 Partially implements proposal 122.
1157 - Authorities can now come to a consensus on which method to use to
1158 compute the consensus. This gives us forward compatibility.
1161 - Stop publishing a new server descriptor just because we HUP or
1162 when we find our DirPort to be reachable but won't actually publish
1163 it. New descriptors without any real changes are dropped by the
1164 authorities, and can screw up our "publish every 18 hours" schedule.
1166 - When a router wasn't listed in a new networkstatus, we were leaving
1167 the flags for that router alone -- meaning it remained Named,
1168 Running, etc -- even though absence from the networkstatus means
1169 that it shouldn't be considered to exist at all anymore. Now we
1170 clear all the flags for routers that fall out of the networkstatus
1171 consensus. Fixes bug 529; bugfix on 0.1.2.x.
1172 - Fix awful behavior in DownloadExtraInfo option where we'd fetch
1173 extrainfo documents and then discard them immediately for not
1174 matching the latest router. Bugfix on 0.2.0.1-alpha.
1176 o Minor features (v3 directory protocol):
1177 - Allow tor-gencert to generate a new certificate without replacing
1179 - Allow certificates to include an address.
1180 - When we change our directory-cache settings, reschedule all voting
1181 and download operations.
1182 - Reattempt certificate downloads immediately on failure, as long as
1183 we haven't failed a threshold number of times yet.
1184 - Delay retrying consensus downloads while we're downloading
1185 certificates to verify the one we just got. Also, count getting a
1186 consensus that we already have (or one that isn't valid) as a failure,
1187 and count failing to get the certificates after 20 minutes as a
1189 - Build circuits and download descriptors even if our consensus is a
1190 little expired. (This feature will go away once authorities are
1193 o Minor features (router descriptor cache):
1194 - If we find a cached-routers file that's been sitting around for more
1195 than 28 days unmodified, then most likely it's a leftover from
1196 when we upgraded to 0.2.0.8-alpha. Remove it. It has no good
1198 - When we (as a cache) download a descriptor because it was listed
1199 in a consensus, remember when the consensus was supposed to expire,
1200 and don't expire the descriptor until then.
1202 o Minor features (performance):
1203 - Call routerlist_remove_old_routers() much less often. This should
1204 speed startup, especially on directory caches.
1205 - Don't try to launch new descriptor downloads quite so often when we
1206 already have enough directory information to build circuits.
1207 - Base64 decoding was actually showing up on our profile when parsing
1208 the initial descriptor file; switch to an in-process all-at-once
1209 implementation that's about 3.5x times faster than calling out to
1212 o Minor features (compilation):
1213 - Detect non-ASCII platforms (if any still exist) and refuse to
1214 build there: some of our code assumes that 'A' is 65 and so on.
1216 o Minor bugfixes (v3 directory authorities, bugfixes on 0.2.0.x):
1217 - Make the "next period" votes into "current period" votes immediately
1218 after publishing the consensus; avoid a heisenbug that made them
1219 stick around indefinitely.
1220 - When we discard a vote as a duplicate, do not report this as
1222 - Treat missing v3 keys or certificates as an error when running as a
1223 v3 directory authority.
1224 - When we're configured to be a v3 authority, but we're only listed
1225 as a non-v3 authority in our DirServer line for ourself, correct
1227 - If an authority doesn't have a qualified hostname, just put
1228 its address in the vote. This fixes the problem where we referred to
1229 "moria on moria:9031."
1230 - Distinguish between detached signatures for the wrong period, and
1231 detached signatures for a divergent vote.
1232 - Fix a small memory leak when computing a consensus.
1233 - When there's no concensus, we were forming a vote every 30
1234 minutes, but writing the "valid-after" line in our vote based
1235 on our configured V3AuthVotingInterval: so unless the intervals
1236 matched up, we immediately rejected our own vote because it didn't
1237 start at the voting interval that caused us to construct a vote.
1239 o Minor bugfixes (v3 directory protocol, bugfixes on 0.2.0.x):
1240 - Delete unverified-consensus when the real consensus is set.
1241 - Consider retrying a consensus networkstatus fetch immediately
1242 after one fails: don't wait 60 seconds to notice.
1243 - When fetching a consensus as a cache, wait until a newer consensus
1244 should exist before trying to replace the current one.
1245 - Use a more forgiving schedule for retrying failed consensus
1246 downloads than for other types.
1248 o Minor bugfixes (other directory issues):
1249 - Correct the implementation of "download votes by digest." Bugfix on
1251 - Authorities no longer send back "400 you're unreachable please fix
1252 it" errors to Tor servers that aren't online all the time. We're
1253 supposed to tolerate these servers now. Bugfix on 0.1.2.x.
1255 o Minor bugfixes (controller):
1256 - Don't reset trusted dir server list when we set a configuration
1257 option. Patch from Robert Hogan; bugfix on 0.1.2.x.
1258 - Respond to INT and TERM SIGNAL commands before we execute the
1259 signal, in case the signal shuts us down. We had a patch in
1260 0.1.2.1-alpha that tried to do this by queueing the response on
1261 the connection's buffer before shutting down, but that really
1262 isn't the same thing at all. Bug located by Matt Edman.
1264 o Minor bugfixes (misc):
1265 - Correctly check for bad options to the "PublishServerDescriptor"
1266 config option. Bugfix on 0.2.0.1-alpha; reported by Matt Edman.
1267 - Stop leaking memory on failing case of base32_decode, and make
1268 it accept upper-case letters. Bugfixes on 0.2.0.7-alpha.
1269 - Don't try to download extrainfo documents when we're trying to
1270 fetch enough directory info to build a circuit: having enough
1271 info should get priority. Bugfix on 0.2.0.x.
1272 - Don't complain that "your server has not managed to confirm that its
1273 ports are reachable" if we haven't been able to build any circuits
1274 yet. Bug found by spending four hours without a v3 consensus. Bugfix
1276 - Detect the reason for failing to mmap a descriptor file we just
1277 wrote, and give a more useful log message. Fixes bug 533. Bugfix
1280 o Code simplifications and refactoring:
1281 - Remove support for the old bw_accounting file: we've been storing
1282 bandwidth accounting information in the state file since
1283 0.1.2.5-alpha. This may result in bandwidth accounting errors
1284 if you try to upgrade from 0.1.1.x or earlier, or if you try to
1285 downgrade to 0.1.1.x or earlier.
1286 - New convenience code to locate a file within the DataDirectory.
1287 - Move non-authority functionality out of dirvote.c.
1288 - Refactor the arguments for router_pick_{directory_|trusteddir}server
1289 so that they all take the same named flags.
1292 - Include the "tor-ctrl.sh" bash script by Stefan Behte to provide
1293 Unix users an easy way to script their Tor process (e.g. by
1294 adjusting bandwidth based on the time of the day).
1297 Changes in version 0.2.0.8-alpha - 2007-10-12
1298 This eighth development snapshot fixes a crash bug that's been bothering
1299 us since February 2007, lets bridge authorities store a list of bridge
1300 descriptors they've seen, gets v3 directory voting closer to working,
1301 starts caching v3 directory consensus documents on directory mirrors,
1302 and fixes a variety of smaller issues including some minor memory leaks.
1304 o Major features (router descriptor cache):
1305 - Store routers in a file called cached-descriptors instead of in
1306 cached-routers. Initialize cached-descriptors from cached-routers
1307 if the old format is around. The new format allows us to store
1308 annotations along with descriptors.
1309 - Use annotations to record the time we received each descriptor, its
1310 source, and its purpose.
1311 - Disable the SETROUTERPURPOSE controller command: it is now
1313 - Controllers should now specify cache=no or cache=yes when using
1314 the +POSTDESCRIPTOR command.
1315 - Bridge authorities now write bridge descriptors to disk, meaning
1316 we can export them to other programs and begin distributing them
1319 o Major features (directory authorities):
1320 - When a v3 authority is missing votes or signatures, it now tries
1322 - Directory authorities track weighted fractional uptime as well as
1323 weighted mean-time-between failures. WFU is suitable for deciding
1324 whether a node is "usually up", while MTBF is suitable for deciding
1325 whether a node is "likely to stay up." We need both, because
1326 "usually up" is a good requirement for guards, while "likely to
1327 stay up" is a good requirement for long-lived connections.
1329 o Major features (v3 directory system):
1330 - Caches now download v3 network status documents as needed,
1331 and download the descriptors listed in them.
1332 - All hosts now attempt to download and keep fresh v3 authority
1333 certificates, and re-attempt after failures.
1334 - More internal-consistency checks for vote parsing.
1336 o Major bugfixes (crashes):
1337 - If a connection is shut down abruptly because of something that
1338 happened inside connection_flushed_some(), do not call
1339 connection_finished_flushing(). Should fix bug 451. Bugfix on
1342 o Major bugfixes (performance):
1343 - Fix really bad O(n^2) performance when parsing a long list of
1344 routers: Instead of searching the entire list for an "extra-info "
1345 string which usually wasn't there, once for every routerinfo
1346 we read, just scan lines forward until we find one we like.
1348 - When we add data to a write buffer in response to the data on that
1349 write buffer getting low because of a flush, do not consider the
1350 newly added data as a candidate for immediate flushing, but rather
1351 make it wait until the next round of writing. Otherwise, we flush
1352 and refill recursively, and a single greedy TLS connection can
1353 eat all of our bandwidth. Bugfix on 0.1.2.7-alpha.
1355 o Minor features (v3 authority system):
1356 - Add more ways for tools to download the votes that lead to the
1358 - Send a 503 when low on bandwidth and a vote, consensus, or
1359 certificate is requested.
1360 - If-modified-since is now implemented properly for all kinds of
1361 certificate requests.
1363 o Minor bugfixes (network statuses):
1364 - Tweak the implementation of proposal 109 slightly: allow at most
1365 two Tor servers on the same IP address, except if it's the location
1366 of a directory authority, in which case allow five. Bugfix on
1369 o Minor bugfixes (controller):
1370 - When sending a status event to the controller telling it that an
1371 OR address is reachable, set the port correctly. (Previously we
1372 were reporting the dir port.) Bugfix on 0.1.2.x.
1374 o Minor bugfixes (v3 directory system):
1375 - Fix logic to look up a cert by its signing key digest. Bugfix on
1377 - Only change the reply to a vote to "OK" if it's not already
1378 set. This gets rid of annoying "400 OK" log messages, which may
1379 have been masking some deeper issue. Bugfix on 0.2.0.7-alpha.
1380 - When we get a valid consensus, recompute the voting schedule.
1381 - Base the valid-after time of a vote on the consensus voting
1382 schedule, not on our preferred schedule.
1383 - Make the return values and messages from signature uploads and
1384 downloads more sensible.
1385 - Fix a memory leak when serving votes and consensus documents, and
1386 another when serving certificates.
1388 o Minor bugfixes (performance):
1389 - Use a slightly simpler string hashing algorithm (copying Python's
1390 instead of Java's) and optimize our digest hashing algorithm to take
1391 advantage of 64-bit platforms and to remove some possibly-costly
1393 - Fix a minor memory leak whenever we parse guards from our state
1394 file. Bugfix on 0.2.0.7-alpha.
1395 - Fix a minor memory leak whenever we write out a file. Bugfix on
1397 - Fix a minor memory leak whenever a controller sends the PROTOCOLINFO
1398 command. Bugfix on 0.2.0.5-alpha.
1400 o Minor bugfixes (portability):
1401 - On some platforms, accept() can return a broken address. Detect
1402 this more quietly, and deal accordingly. Fixes bug 483.
1403 - Stop calling tor_strlower() on uninitialized memory in some cases.
1404 Bugfix in 0.2.0.7-alpha.
1406 o Minor bugfixes (usability):
1407 - Treat some 403 responses from directory servers as INFO rather than
1408 WARN-severity events.
1409 - It's not actually an error to find a non-pending entry in the DNS
1410 cache when canceling a pending resolve. Don't log unless stuff is
1411 fishy. Resolves bug 463.
1413 o Minor bugfixes (anonymity):
1414 - Never report that we've used more bandwidth than we're willing to
1415 relay: it leaks how much non-relay traffic we're using. Resolves
1417 - When looking for a circuit to cannibalize, consider family as well
1418 as identity. Fixes bug 438. Bugfix on 0.1.0.x (which introduced
1419 circuit cannibalization).
1421 o Code simplifications and refactoring:
1422 - Make a bunch of functions static. Remove some dead code.
1423 - Pull out about a third of the really big routerlist.c; put it in a
1424 new module, networkstatus.c.
1425 - Merge the extra fields in local_routerstatus_t back into
1426 routerstatus_t: we used to need one routerstatus_t for each
1427 authority's opinion, plus a local_routerstatus_t for the locally
1428 computed consensus opinion. To save space, we put the locally
1429 modified fields into local_routerstatus_t, and only the common
1430 stuff into routerstatus_t. But once v3 directories are in use,
1431 clients and caches will no longer need to hold authority opinions;
1432 thus, the rationale for keeping the types separate is now gone.
1433 - Make the code used to reschedule and reattempt downloads more
1435 - Turn all 'Are we a directory server/mirror?' logic into a call to
1437 - Remove the code to generate the oldest (v1) directory format.
1438 The code has been disabled since 0.2.0.5-alpha.
1441 Changes in version 0.2.0.7-alpha - 2007-09-21
1442 This seventh development snapshot makes bridges work again, makes bridge
1443 authorities work for the first time, fixes two huge performance flaws
1444 in hidden services, and fixes a variety of minor issues.
1446 o New directory authorities:
1447 - Set up moria1 and tor26 as the first v3 directory authorities. See
1448 doc/spec/dir-spec.txt for details on the new directory design.
1450 o Major bugfixes (crashes):
1451 - Fix possible segfaults in functions called from
1452 rend_process_relay_cell(). Bugfix on 0.1.2.x.
1454 o Major bugfixes (bridges):
1455 - Fix a bug that made servers send a "404 Not found" in response to
1456 attempts to fetch their server descriptor. This caused Tor servers
1457 to take many minutes to establish reachability for their DirPort,
1458 and it totally crippled bridges. Bugfix on 0.2.0.5-alpha.
1459 - Make "UpdateBridgesFromAuthority" torrc option work: when bridge
1460 users configure that and specify a bridge with an identity
1461 fingerprint, now they will lookup the bridge descriptor at the
1462 default bridge authority via a one-hop tunnel, but once circuits
1463 are established they will switch to a three-hop tunnel for later
1464 connections to the bridge authority. Bugfix in 0.2.0.3-alpha.
1466 o Major bugfixes (hidden services):
1467 - Hidden services were choosing introduction points uniquely by
1468 hexdigest, but when constructing the hidden service descriptor
1469 they merely wrote the (potentially ambiguous) nickname.
1470 - Clients now use the v2 intro format for hidden service
1471 connections: they specify their chosen rendezvous point by identity
1472 digest rather than by (potentially ambiguous) nickname. Both
1473 are bugfixes on 0.1.2.x, and they could speed up hidden service
1474 connections dramatically. Thanks to Karsten Loesing.
1476 o Minor features (security):
1477 - As a client, do not believe any server that tells us that an
1478 address maps to an internal address space.
1479 - Make it possible to enable HashedControlPassword and
1480 CookieAuthentication at the same time.
1482 o Minor features (guard nodes):
1483 - Tag every guard node in our state file with the version that
1484 we believe added it, or with our own version if we add it. This way,
1485 if a user temporarily runs an old version of Tor and then switches
1486 back to a new one, she doesn't automatically lose her guards.
1488 o Minor features (speed):
1489 - When implementing AES counter mode, update only the portions of the
1490 counter buffer that need to change, and don't keep separate
1491 network-order and host-order counters when they are the same (i.e.,
1492 on big-endian hosts.)
1494 o Minor features (controller):
1495 - Accept LF instead of CRLF on controller, since some software has a
1496 hard time generating real Internet newlines.
1497 - Add GETINFO values for the server status events
1498 "REACHABILITY_SUCCEEDED" and "GOOD_SERVER_DESCRIPTOR". Patch from
1502 - Routers no longer include bandwidth-history lines in their
1503 descriptors; this information is already available in extra-info
1504 documents, and including it in router descriptors took up 60%
1505 (!) of compressed router descriptor downloads. Completes
1506 implementation of proposal 104.
1507 - Remove the contrib scripts ExerciseServer.py, PathDemo.py,
1508 and TorControl.py, as they use the old v0 controller protocol,
1509 and are obsoleted by TorFlow anyway.
1510 - Drop support for v1 rendezvous descriptors, since we never used
1511 them anyway, and the code has probably rotted by now. Based on
1512 patch from Karsten Loesing.
1513 - On OSX, stop warning the user that kqueue support in libevent is
1514 "experimental", since it seems to have worked fine for ages.
1517 - When generating information telling us how to extend to a given
1518 router, do not try to include the nickname if it is absent. Fixes
1519 bug 467. Bugfix on 0.2.0.3-alpha.
1520 - Fix a user-triggerable (but not remotely-triggerable) segfault
1521 in expand_filename(). Bugfix on 0.1.2.x.
1522 - Fix a memory leak when freeing incomplete requests from DNSPort.
1523 Found by Niels Provos with valgrind. Bugfix on 0.2.0.1-alpha.
1524 - Don't try to access (or alter) the state file when running
1525 --list-fingerprint or --verify-config or --hash-password. (Resolves
1526 bug 499.) Bugfix on 0.1.2.x.
1527 - Servers used to decline to publish their DirPort if their
1528 BandwidthRate, RelayBandwidthRate, or MaxAdvertisedBandwidth
1529 were below a threshold. Now they only look at BandwidthRate and
1530 RelayBandwidthRate. Bugfix on 0.1.2.x.
1531 - Remove an optimization in the AES counter-mode code that assumed
1532 that the counter never exceeded 2^68. When the counter can be set
1533 arbitrarily as an IV (as it is by Karsten's new hidden services
1534 code), this assumption no longer holds. Bugfix on 0.1.2.x.
1535 - Resume listing "AUTHORITY" flag for authorities in network status.
1536 Bugfix on 0.2.0.3-alpha; reported by Alex de Joode.
1538 o Code simplifications and refactoring:
1539 - Revamp file-writing logic so we don't need to have the entire
1540 contents of a file in memory at once before we write to disk. Tor,
1542 - Turn "descriptor store" into a full-fledged type.
1543 - Move all NT services code into a separate source file.
1544 - Unify all code that computes medians, percentile elements, etc.
1545 - Get rid of a needless malloc when parsing address policies.
1548 Changes in version 0.1.2.17 - 2007-08-30
1549 Tor 0.1.2.17 features a new Vidalia version in the Windows and OS
1550 X bundles. Vidalia 0.0.14 makes authentication required for the
1551 ControlPort in the default configuration, which addresses important
1552 security risks. Everybody who uses Vidalia (or another controller)
1555 In addition, this Tor update fixes major load balancing problems with
1556 path selection, which should speed things up a lot once many people
1559 o Major bugfixes (security):
1560 - We removed support for the old (v0) control protocol. It has been
1561 deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
1562 become more of a headache than it's worth.
1564 o Major bugfixes (load balancing):
1565 - When choosing nodes for non-guard positions, weight guards
1566 proportionally less, since they already have enough load. Patch
1568 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
1569 will allow fast Tor servers to get more attention.
1570 - When we're upgrading from an old Tor version, forget our current
1571 guards and pick new ones according to the new weightings. These
1572 three load balancing patches could raise effective network capacity
1573 by a factor of four. Thanks to Mike Perry for measurements.
1575 o Major bugfixes (stream expiration):
1576 - Expire not-yet-successful application streams in all cases if
1577 they've been around longer than SocksTimeout. Right now there are
1578 some cases where the stream will live forever, demanding a new
1579 circuit every 15 seconds. Fixes bug 454; reported by lodger.
1581 o Minor features (controller):
1582 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
1583 is valid before any authentication has been received. It tells
1584 a controller what kind of authentication is expected, and what
1585 protocol is spoken. Implements proposal 119.
1587 o Minor bugfixes (performance):
1588 - Save on most routerlist_assert_ok() calls in routerlist.c, thus
1589 greatly speeding up loading cached-routers from disk on startup.
1590 - Disable sentinel-based debugging for buffer code: we squashed all
1591 the bugs that this was supposed to detect a long time ago, and now
1592 its only effect is to change our buffer sizes from nice powers of
1593 two (which platform mallocs tend to like) to values slightly over
1594 powers of two (which make some platform mallocs sad).
1596 o Minor bugfixes (misc):
1597 - If exit bandwidth ever exceeds one third of total bandwidth, then
1598 use the correct formula to weight exit nodes when choosing paths.
1599 Based on patch from Mike Perry.
1600 - Choose perfectly fairly among routers when choosing by bandwidth and
1601 weighting by fraction of bandwidth provided by exits. Previously, we
1602 would choose with only approximate fairness, and correct ourselves
1603 if we ran off the end of the list.
1604 - If we require CookieAuthentication but we fail to write the
1605 cookie file, we would warn but not exit, and end up in a state
1606 where no controller could authenticate. Now we exit.
1607 - If we require CookieAuthentication, stop generating a new cookie
1608 every time we change any piece of our config.
1609 - Refuse to start with certain directory authority keys, and
1610 encourage people using them to stop.
1611 - Terminate multi-line control events properly. Original patch
1613 - Fix a minor memory leak when we fail to find enough suitable
1614 servers to choose a circuit.
1615 - Stop leaking part of the descriptor when we run into a particularly
1616 unparseable piece of it.
1619 Changes in version 0.2.0.6-alpha - 2007-08-26
1620 This sixth development snapshot features a new Vidalia version in the
1621 Windows and OS X bundles. Vidalia 0.0.14 makes authentication required for
1622 the ControlPort in the default configuration, which addresses important
1625 In addition, this snapshot fixes major load balancing problems
1626 with path selection, which should speed things up a lot once many
1627 people have upgraded. The directory authorities also use a new
1628 mean-time-between-failure approach to tracking which servers are stable,
1629 rather than just looking at the most recent uptime.
1631 o New directory authorities:
1632 - Set up Tonga as the default bridge directory authority.
1635 - Directory authorities now track servers by weighted
1636 mean-times-between-failures. When we have 4 or more days of data,
1637 use measured MTBF rather than declared uptime to decide whether
1638 to call a router Stable. Implements proposal 108.
1640 o Major bugfixes (load balancing):
1641 - When choosing nodes for non-guard positions, weight guards
1642 proportionally less, since they already have enough load. Patch
1644 - Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
1645 will allow fast Tor servers to get more attention.
1646 - When we're upgrading from an old Tor version, forget our current
1647 guards and pick new ones according to the new weightings. These
1648 three load balancing patches could raise effective network capacity
1649 by a factor of four. Thanks to Mike Perry for measurements.
1651 o Major bugfixes (descriptor parsing):
1652 - Handle unexpected whitespace better in malformed descriptors. Bug
1653 found using Benedikt Boss's new Tor fuzzer! Bugfix on 0.2.0.x.
1656 - There is now an ugly, temporary "desc/all-recent-extrainfo-hack"
1657 GETINFO for Torstat to use until it can switch to using extrainfos.
1658 - Optionally (if built with -DEXPORTMALLINFO) export the output
1659 of mallinfo via http, as tor/mallinfo.txt. Only accessible
1663 - Do not intermix bridge routers with controller-added
1664 routers. (Bugfix on 0.2.0.x)
1665 - Do not fail with an assert when accept() returns an unexpected
1666 address family. Addresses but does not wholly fix bug 483. (Bugfix
1668 - Let directory authorities startup even when they can't generate
1669 a descriptor immediately, e.g. because they don't know their
1671 - Stop putting the authentication cookie in a file called "0"
1672 in your working directory if you don't specify anything for the
1673 new CookieAuthFile option. Reported by Matt Edman.
1674 - Make it possible to read the PROTOCOLINFO response in a way that
1675 conforms to our control-spec. Reported by Matt Edman.
1676 - Fix a minor memory leak when we fail to find enough suitable
1677 servers to choose a circuit. Bugfix on 0.1.2.x.
1678 - Stop leaking part of the descriptor when we run into a particularly
1679 unparseable piece of it. Bugfix on 0.1.2.x.
1680 - Unmap the extrainfo cache file on exit.
1683 Changes in version 0.2.0.5-alpha - 2007-08-19
1684 This fifth development snapshot fixes compilation on Windows again;
1685 fixes an obnoxious client-side bug that slowed things down and put
1686 extra load on the network; gets us closer to using the v3 directory
1687 voting scheme; makes it easier for Tor controllers to use cookie-based
1688 authentication; and fixes a variety of other bugs.
1691 - Version 1 directories are no longer generated in full. Instead,
1692 authorities generate and serve "stub" v1 directories that list
1693 no servers. This will stop Tor versions 0.1.0.x and earlier from
1694 working, but (for security reasons) nobody should be running those
1697 o Major bugfixes (compilation, 0.2.0.x):
1698 - Try to fix Win32 compilation again: improve checking for IPv6 types.
1699 - Try to fix MSVC compilation: build correctly on platforms that do
1700 not define s6_addr16 or s6_addr32.
1701 - Fix compile on platforms without getaddrinfo: bug found by Li-Hui
1704 o Major bugfixes (stream expiration):
1705 - Expire not-yet-successful application streams in all cases if
1706 they've been around longer than SocksTimeout. Right now there are
1707 some cases where the stream will live forever, demanding a new
1708 circuit every 15 seconds. Bugfix on 0.1.2.7-alpha; fixes bug 454;
1711 o Minor features (directory servers):
1712 - When somebody requests a list of statuses or servers, and we have
1713 none of those, return a 404 rather than an empty 200.
1715 o Minor features (directory voting):
1716 - Store v3 consensus status consensuses on disk, and reload them
1719 o Minor features (security):
1720 - Warn about unsafe ControlPort configurations.
1721 - Refuse to start with certain directory authority keys, and
1722 encourage people using them to stop.
1724 o Minor features (controller):
1725 - Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
1726 is valid before any authentication has been received. It tells
1727 a controller what kind of authentication is expected, and what
1728 protocol is spoken. Implements proposal 119.
1729 - New config option CookieAuthFile to choose a new location for the
1730 cookie authentication file, and config option
1731 CookieAuthFileGroupReadable to make it group-readable.
1733 o Minor features (unit testing):
1734 - Add command-line arguments to unit-test executable so that we can
1735 invoke any chosen test from the command line rather than having
1736 to run the whole test suite at once; and so that we can turn on
1737 logging for the unit tests.
1739 o Minor bugfixes (on 0.1.2.x):
1740 - If we require CookieAuthentication but we fail to write the
1741 cookie file, we would warn but not exit, and end up in a state
1742 where no controller could authenticate. Now we exit.
1743 - If we require CookieAuthentication, stop generating a new cookie
1744 every time we change any piece of our config.
1745 - When loading bandwidth history, do not believe any information in
1746 the future. Fixes bug 434.
1747 - When loading entry guard information, do not believe any information
1749 - When we have our clock set far in the future and generate an
1750 onion key, then re-set our clock to be correct, we should not stop
1751 the onion key from getting rotated.
1752 - Clean up torrc sample config file.
1753 - Do not automatically run configure from autogen.sh. This
1754 non-standard behavior tended to annoy people who have built other
1757 o Minor bugfixes (on 0.2.0.x):
1758 - Fix a bug with AutomapHostsOnResolve that would always cause
1759 the second request to fail. Bug reported by Kate. Bugfix on
1761 - Fix a bug in ADDRMAP controller replies that would sometimes
1762 try to print a NULL. Patch from tup.
1763 - Read v3 directory authority keys from the right location.
1764 - Numerous bugfixes to directory voting code.
1767 Changes in version 0.1.2.16 - 2007-08-01
1768 Tor 0.1.2.16 fixes a critical security vulnerability that allows a
1769 remote attacker in certain situations to rewrite the user's torrc
1770 configuration file. This can completely compromise anonymity of users
1771 in most configurations, including those running the Vidalia bundles,
1772 TorK, etc. Or worse.
1774 o Major security fixes:
1775 - Close immediately after missing authentication on control port;
1776 do not allow multiple authentication attempts.
1779 Changes in version 0.2.0.4-alpha - 2007-08-01
1780 This fourth development snapshot fixes a critical security vulnerability
1781 for most users, specifically those running Vidalia, TorK, etc. Everybody
1782 should upgrade to either 0.1.2.16 or 0.2.0.4-alpha.
1784 o Major security fixes:
1785 - Close immediately after missing authentication on control port;
1786 do not allow multiple authentication attempts.
1788 o Major bugfixes (compilation):
1789 - Fix win32 compilation: apparently IN_ADDR and IN6_ADDR are already
1792 o Minor features (performance):
1793 - Be even more aggressive about releasing RAM from small
1794 empty buffers. Thanks to our free-list code, this shouldn't be too
1795 performance-intensive.
1796 - Disable sentinel-based debugging for buffer code: we squashed all
1797 the bugs that this was supposed to detect a long time ago, and
1798 now its only effect is to change our buffer sizes from nice
1799 powers of two (which platform mallocs tend to like) to values
1800 siightly over powers of two (which make some platform mallocs sad).
1801 - Log malloc statistics from mallinfo() on platforms where it
1805 Changes in version 0.2.0.3-alpha - 2007-07-29
1806 This third development snapshot introduces new experimental
1807 blocking-resistance features and a preliminary version of the v3
1808 directory voting design, and includes many other smaller features
1812 - The first pieces of our "bridge" design for blocking-resistance
1813 are implemented. People can run bridge directory authorities;
1814 people can run bridges; and people can configure their Tor clients
1815 with a set of bridges to use as the first hop into the Tor network.
1816 See http://archives.seul.org/or/talk/Jul-2007/msg00249.html for
1818 - Create listener connections before we setuid to the configured
1819 User and Group. Now non-Windows users can choose port values
1820 under 1024, start Tor as root, and have Tor bind those ports
1821 before it changes to another UID. (Windows users could already
1823 - Added a new ConstrainedSockets config option to set SO_SNDBUF and
1824 SO_RCVBUF on TCP sockets. Hopefully useful for Tor servers running
1825 on "vserver" accounts. (Patch from coderman.)
1826 - Be even more aggressive about separating local traffic from relayed
1827 traffic when RelayBandwidthRate is set. (Refines proposal 111.)
1829 o Major features (experimental):
1830 - First cut of code for "v3 dir voting": directory authorities will
1831 vote on a common network status document rather than each publishing
1832 their own opinion. This code needs more testing and more corner-case
1833 handling before it's ready for use.
1836 - Directory authorities now call routers Fast if their bandwidth is
1837 at least 100KB/s, and consider their bandwidth adequate to be a
1838 Guard if it is at least 250KB/s, no matter the medians. This fix
1839 complements proposal 107. [Bugfix on 0.1.2.x]
1840 - Directory authorities now never mark more than 3 servers per IP as
1841 Valid and Running. (Implements proposal 109, by Kevin Bauer and
1843 - Minor change to organizationName and commonName generation
1844 procedures in TLS certificates during Tor handshakes, to invalidate
1845 some earlier censorware approaches. This is not a long-term
1846 solution, but applying it will give us a bit of time to look into
1847 the epidemiology of countermeasures as they spread.
1849 o Major bugfixes (directory):
1850 - Rewrite directory tokenization code to never run off the end of
1851 a string. Fixes bug 455. Patch from croup. [Bugfix on 0.1.2.x]
1853 o Minor features (controller):
1854 - Add a SOURCE_ADDR field to STREAM NEW events so that controllers can
1855 match requests to applications. (Patch from Robert Hogan.)
1856 - Report address and port correctly on connections to DNSPort. (Patch
1858 - Add a RESOLVE command to launch hostname lookups. (Original patch
1860 - Add GETINFO status/enough-dir-info to let controllers tell whether
1861 Tor has downloaded sufficient directory information. (Patch
1863 - You can now use the ControlSocket option to tell Tor to listen for
1864 controller connections on Unix domain sockets on systems that
1865 support them. (Patch from Peter Palfrader.)
1866 - STREAM NEW events are generated for DNSPort requests and for
1867 tunneled directory connections. (Patch from Robert Hogan.)
1868 - New "GETINFO address-mappings/*" command to get address mappings
1869 with expiry information. "addr-mappings/*" is now deprecated.
1872 o Minor features (misc):
1873 - Merge in some (as-yet-unused) IPv6 address manipulation code. (Patch
1875 - The tor-gencert tool for v3 directory authorities now creates all
1876 files as readable to the file creator only, and write-protects
1877 the authority identity key.
1878 - When dumping memory usage, list bytes used in buffer memory
1880 - When running with dmalloc, dump more stats on hup and on exit.
1881 - Directory authorities now fail quickly and (relatively) harmlessly
1882 if they generate a network status document that is somehow
1885 o Traffic load balancing improvements:
1886 - If exit bandwidth ever exceeds one third of total bandwidth, then
1887 use the correct formula to weight exit nodes when choosing paths.
1888 (Based on patch from Mike Perry.)
1889 - Choose perfectly fairly among routers when choosing by bandwidth and
1890 weighting by fraction of bandwidth provided by exits. Previously, we
1891 would choose with only approximate fairness, and correct ourselves
1892 if we ran off the end of the list. [Bugfix on 0.1.2.x]
1894 o Performance improvements:
1895 - Be more aggressive with freeing buffer RAM or putting it on the
1897 - Use Critical Sections rather than Mutexes for synchronizing threads
1898 on win32; Mutexes are heavier-weight, and designed for synchronizing
1901 o Deprecated and removed features:
1902 - RedirectExits is now deprecated.
1903 - Stop allowing address masks that do not correspond to bit prefixes.
1904 We have warned about these for a really long time; now it's time
1905 to reject them. (Patch from croup.)
1907 o Minor bugfixes (directory):
1908 - Fix another crash bug related to extra-info caching. (Bug found by
1909 Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
1910 - Directories no longer return a "304 not modified" when they don't
1911 have the networkstatus the client asked for. Also fix a memory
1912 leak when returning 304 not modified. [Bugfixes on 0.2.0.2-alpha]
1913 - We had accidentally labelled 0.1.2.x directory servers as not
1914 suitable for begin_dir requests, and had labelled no directory
1915 servers as suitable for uploading extra-info documents. [Bugfix
1918 o Minor bugfixes (dns):
1919 - Fix a crash when DNSPort is set more than once. (Patch from Robert
1920 Hogan.) [Bugfix on 0.2.0.2-alpha]
1921 - Add DNSPort connections to the global connection list, so that we
1922 can time them out correctly. (Bug found by Robert Hogan.) [Bugfix
1924 - Fix a dangling reference that could lead to a crash when DNSPort is
1925 changed or closed (Patch from Robert Hogan.) [Bugfix on
1928 o Minor bugfixes (controller):
1929 - Provide DNS expiry times in GMT, not in local time. For backward
1930 compatibility, ADDRMAP events only provide GMT expiry in an extended
1931 field. "GETINFO address-mappings" always does the right thing.
1932 - Use CRLF line endings properly in NS events.
1933 - Terminate multi-line control events properly. (Original patch
1934 from tup.) [Bugfix on 0.1.2.x-alpha]
1935 - Do not include spaces in SOURCE_ADDR fields in STREAM
1936 events. Resolves bug 472. [Bugfix on 0.2.0.x-alpha]
1939 Changes in version 0.1.2.15 - 2007-07-17
1940 Tor 0.1.2.15 fixes several crash bugs, fixes some anonymity-related
1941 problems, fixes compilation on BSD, and fixes a variety of other
1942 bugs. Everybody should upgrade.
1944 o Major bugfixes (compilation):
1945 - Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
1947 o Major bugfixes (crashes):
1948 - Try even harder not to dereference the first character after
1949 an mmap(). Reported by lodger.
1950 - Fix a crash bug in directory authorities when we re-number the
1951 routerlist while inserting a new router.
1952 - When the cached-routers file is an even multiple of the page size,
1953 don't run off the end and crash. (Fixes bug 455; based on idea
1955 - Fix eventdns.c behavior on Solaris: It is critical to include
1956 orconfig.h _before_ sys/types.h, so that we can get the expected
1957 definition of _FILE_OFFSET_BITS.
1959 o Major bugfixes (security):
1960 - Fix a possible buffer overrun when using BSD natd support. Bug
1962 - When sending destroy cells from a circuit's origin, don't include
1963 the reason for tearing down the circuit. The spec says we didn't,
1964 and now we actually don't. Reported by lodger.
1965 - Keep streamids from different exits on a circuit separate. This
1966 bug may have allowed other routers on a given circuit to inject
1967 cells into streams. Reported by lodger; fixes bug 446.
1968 - If there's a never-before-connected-to guard node in our list,
1969 never choose any guards past it. This way we don't expand our
1970 guard list unless we need to.
1972 o Minor bugfixes (guard nodes):
1973 - Weight guard selection by bandwidth, so that low-bandwidth nodes
1974 don't get overused as guards.
1976 o Minor bugfixes (directory):
1977 - Correctly count the number of authorities that recommend each
1978 version. Previously, we were under-counting by 1.
1979 - Fix a potential crash bug when we load many server descriptors at
1980 once and some of them make others of them obsolete. Fixes bug 458.
1982 o Minor bugfixes (hidden services):
1983 - Stop tearing down the whole circuit when the user asks for a
1984 connection to a port that the hidden service didn't configure.
1987 o Minor bugfixes (misc):
1988 - On Windows, we were preventing other processes from reading
1989 cached-routers while Tor was running. Reported by janbar.
1990 - Fix a possible (but very unlikely) bug in picking routers by
1991 bandwidth. Add a log message to confirm that it is in fact
1992 unlikely. Patch from lodger.
1993 - Backport a couple of memory leak fixes.
1994 - Backport miscellaneous cosmetic bugfixes.
1997 Changes in version 0.2.0.2-alpha - 2007-06-02
1998 o Major bugfixes on 0.2.0.1-alpha:
1999 - Fix an assertion failure related to servers without extra-info digests.
2000 Resolves bugs 441 and 442.
2002 o Minor features (directory):
2003 - Support "If-Modified-Since" when answering HTTP requests for
2004 directories, running-routers documents, and network-status documents.
2005 (There's no need to support it for router descriptors, since those
2006 are downloaded by descriptor digest.)
2008 o Minor build issues:
2009 - Clear up some MIPSPro compiler warnings.
2010 - When building from a tarball on a machine that happens to have SVK
2011 installed, report the micro-revision as whatever version existed
2012 in the tarball, not as "x".
2015 Changes in version 0.2.0.1-alpha - 2007-06-01
2016 This early development snapshot provides new features for people running
2017 Tor as both a client and a server (check out the new RelayBandwidth
2018 config options); lets Tor run as a DNS proxy; and generally moves us
2019 forward on a lot of fronts.
2021 o Major features, server usability:
2022 - New config options RelayBandwidthRate and RelayBandwidthBurst:
2023 a separate set of token buckets for relayed traffic. Right now
2024 relayed traffic is defined as answers to directory requests, and
2025 OR connections that don't have any local circuits on them.
2027 o Major features, client usability:
2028 - A client-side DNS proxy feature to replace the need for
2029 dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
2030 for DNS requests on port 9999, use the Tor network to resolve them
2031 anonymously, and send the reply back like a regular DNS server.
2032 The code still only implements a subset of DNS.
2033 - Make PreferTunneledDirConns and TunnelDirConns work even when
2034 we have no cached directory info. This means Tor clients can now
2035 do all of their connections protected by TLS.
2037 o Major features, performance and efficiency:
2038 - Directory authorities accept and serve "extra info" documents for
2039 routers. These documents contain fields from router descriptors
2040 that aren't usually needed, and that use a lot of excess
2041 bandwidth. Once these fields are removed from router descriptors,
2042 the bandwidth savings should be about 60%. [Partially implements
2044 - Servers upload extra-info documents to any authority that accepts
2045 them. Authorities (and caches that have been configured to download
2046 extra-info documents) download them as needed. [Partially implements
2048 - Change the way that Tor buffers data that it is waiting to write.
2049 Instead of queueing data cells in an enormous ring buffer for each
2050 client->OR or OR->OR connection, we now queue cells on a separate
2051 queue for each circuit. This lets us use less slack memory, and
2052 will eventually let us be smarter about prioritizing different kinds
2054 - Use memory pools to allocate cells with better speed and memory
2055 efficiency, especially on platforms where malloc() is inefficient.
2056 - Stop reading on edge connections when their corresponding circuit
2057 buffers are full; start again as the circuits empty out.
2059 o Major features, other:
2060 - Add an HSAuthorityRecordStats option that hidden service authorities
2061 can use to track statistics of overall hidden service usage without
2062 logging information that would be very useful to an attacker.
2063 - Start work implementing multi-level keys for directory authorities:
2064 Add a standalone tool to generate key certificates. (Proposal 103.)
2067 - Directory authorities now call routers Stable if they have an
2068 uptime of at least 30 days, even if that's not the median uptime
2069 in the network. Implements proposal 107, suggested by Kevin Bauer
2072 o Minor fixes (resource management):
2073 - Count the number of open sockets separately from the number
2074 of active connection_t objects. This will let us avoid underusing
2075 our allocated connection limit.
2076 - We no longer use socket pairs to link an edge connection to an
2077 anonymous directory connection or a DirPort test connection.
2078 Instead, we track the link internally and transfer the data
2079 in-process. This saves two sockets per "linked" connection (at the
2080 client and at the server), and avoids the nasty Windows socketpair()
2082 - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
2083 for every single inactive connection_t. Free items from the
2084 4k/16k-buffer free lists when they haven't been used for a while.
2086 o Minor features (build):
2087 - Make autoconf search for libevent, openssl, and zlib consistently.
2088 - Update deprecated macros in configure.in.
2089 - When warning about missing headers, tell the user to let us
2090 know if the compile succeeds anyway, so we can downgrade the
2092 - Include the current subversion revision as part of the version
2093 string: either fetch it directly if we're in an SVN checkout, do
2094 some magic to guess it if we're in an SVK checkout, or use
2095 the last-detected version if we're building from a .tar.gz.
2096 Use this version consistently in log messages.
2098 o Minor features (logging):
2099 - Always prepend "Bug: " to any log message about a bug.
2100 - Put a platform string (e.g. "Linux i686") in the startup log
2101 message, so when people paste just their logs, we know if it's
2102 OpenBSD or Windows or what.
2103 - When logging memory usage, break down memory used in buffers by
2106 o Minor features (directory system):
2107 - New config option V2AuthoritativeDirectory that all directory
2108 authorities should set. This will let future authorities choose
2109 not to serve V2 directory information.
2110 - Directory authorities allow multiple router descriptors and/or extra
2111 info documents to be uploaded in a single go. This will make
2112 implementing proposal 104 simpler.
2114 o Minor features (controller):
2115 - Add a new config option __DisablePredictedCircuits designed for
2116 use by the controller, when we don't want Tor to build any circuits
2118 - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
2119 so we can exit from the middle of the circuit.
2120 - Implement "getinfo status/circuit-established".
2121 - Implement "getinfo status/version/..." so a controller can tell
2122 whether the current version is recommended, and whether any versions
2123 are good, and how many authorities agree. (Patch from shibz.)
2125 o Minor features (hidden services):
2126 - Allow multiple HiddenServicePort directives with the same virtual
2127 port; when they occur, the user is sent round-robin to one
2128 of the target ports chosen at random. Partially fixes bug 393 by
2129 adding limited ad-hoc round-robining.
2131 o Minor features (other):
2133 - Add a new AutomapHostsOnResolve option: when it is enabled, any
2134 resolve request for hosts matching a given pattern causes Tor to
2135 generate an internal virtual address mapping for that host. This
2136 allows DNSPort to work sensibly with hidden service users. By
2137 default, .exit and .onion addresses are remapped; the list of
2138 patterns can be reconfigured with AutomapHostsSuffixes.
2139 - Add an "-F" option to tor-resolve to force a resolve for a .onion
2140 address. Thanks to the AutomapHostsOnResolve option, this is no
2141 longer a completely silly thing to do.
2142 - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
2143 now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
2144 - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
2145 minus 1 byte: the actual maximum declared bandwidth.
2148 - Removed support for the old binary "version 0" controller protocol.
2149 This has been deprecated since 0.1.1, and warnings have been issued
2150 since 0.1.2. When we encounter a v0 control message, we now send
2151 back an error and close the connection.
2152 - Remove the old "dns worker" server DNS code: it hasn't been default
2153 since 0.1.2.2-alpha, and all the servers seem to be using the new
2156 o Minor bugfixes (portability):
2157 - Even though Windows is equally happy with / and \ as path separators,
2158 try to use \ consistently on Windows and / consistently on Unix: it
2159 makes the log messages nicer.
2160 - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
2161 - Read resolv.conf files correctly on platforms where read() returns
2162 partial results on small file reads.
2164 o Minor bugfixes (directory):
2165 - Correctly enforce that elements of directory objects do not appear
2166 more often than they are allowed to appear.
2167 - When we are reporting the DirServer line we just parsed, we were
2168 logging the second stanza of the key fingerprint, not the first.
2170 o Minor bugfixes (logging):
2171 - When we hit an EOF on a log (probably because we're shutting down),
2172 don't try to remove the log from the list: just mark it as
2173 unusable. (Bulletproofs against bug 222.)
2175 o Minor bugfixes (other):
2176 - In the exitlist script, only consider the most recently published
2177 server descriptor for each server. Also, when the user requests
2178 a list of servers that _reject_ connections to a given address,
2179 explicitly exclude the IPs that also have servers that accept
2180 connections to that address. (Resolves bug 405.)
2181 - Stop allowing hibernating servers to be "stable" or "fast".
2182 - On Windows, we were preventing other processes from reading
2183 cached-routers while Tor was running. (Reported by janbar)
2184 - Make the NodeFamilies config option work. (Reported by
2185 lodger -- it has never actually worked, even though we added it
2187 - Check return values from pthread_mutex functions.
2188 - Don't save non-general-purpose router descriptors to the disk cache,
2189 because we have no way of remembering what their purpose was when
2191 - Add even more asserts to hunt down bug 417.
2192 - Build without verbose warnings even on (not-yet-released) gcc 4.2.
2193 - Fix a possible (but very unlikely) bug in picking routers by bandwidth.
2194 Add a log message to confirm that it is in fact unlikely.
2196 o Minor bugfixes (controller):
2197 - Make 'getinfo fingerprint' return a 551 error if we're not a
2198 server, so we match what the control spec claims we do. Reported
2200 - Fix a typo in an error message when extendcircuit fails that
2201 caused us to not follow the \r\n-based delimiter protocol. Reported
2204 o Code simplifications and refactoring:
2205 - Stop passing around circuit_t and crypt_path_t pointers that are
2206 implicit in other procedure arguments.
2207 - Drop the old code to choke directory connections when the
2208 corresponding OR connections got full: thanks to the cell queue
2209 feature, OR conns don't get full any more.
2210 - Make dns_resolve() handle attaching connections to circuits
2211 properly, so the caller doesn't have to.
2212 - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
2213 - Keep the connection array as a dynamic smartlist_t, rather than as
2214 a fixed-sized array. This is important, as the number of connections
2215 is becoming increasingly decoupled from the number of sockets.
2218 Changes in version 0.1.2.14 - 2007-05-25
2219 Tor 0.1.2.14 changes the addresses of two directory authorities (this
2220 change especially affects those who serve or use hidden services),
2221 and fixes several other crash- and security-related bugs.
2223 o Directory authority changes:
2224 - Two directory authorities (moria1 and moria2) just moved to new
2225 IP addresses. This change will particularly affect those who serve
2226 or use hidden services.
2228 o Major bugfixes (crashes):
2229 - If a directory server runs out of space in the connection table
2230 as it's processing a begin_dir request, it will free the exit stream
2231 but leave it attached to the circuit, leading to unpredictable
2232 behavior. (Reported by seeess, fixes bug 425.)
2233 - Fix a bug in dirserv_remove_invalid() that would cause authorities
2234 to corrupt memory under some really unlikely scenarios.
2235 - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
2236 - Avoid segfaults when reading from mmaped descriptor file. (Reported
2239 o Major bugfixes (security):
2240 - When choosing an entry guard for a circuit, avoid using guards
2241 that are in the same family as the chosen exit -- not just guards
2242 that are exactly the chosen exit. (Reported by lodger.)
2244 o Major bugfixes (resource management):
2245 - If a directory authority is down, skip it when deciding where to get
2246 networkstatus objects or descriptors. Otherwise we keep asking
2247 every 10 seconds forever. Fixes bug 384.
2248 - Count it as a failure if we fetch a valid network-status but we
2249 don't want to keep it. Otherwise we'll keep fetching it and keep
2250 not wanting to keep it. Fixes part of bug 422.
2251 - If all of our dirservers have given us bad or no networkstatuses
2252 lately, then stop hammering them once per minute even when we
2253 think they're failed. Fixes another part of bug 422.
2256 - Actually set the purpose correctly for descriptors inserted with
2258 - When we have k non-v2 authorities in our DirServer config,
2259 we ignored the last k authorities in the list when updating our
2261 - Correctly back-off from requesting router descriptors that we are
2262 having a hard time downloading.
2263 - Read resolv.conf files correctly on platforms where read() returns
2264 partial results on small file reads.
2265 - Don't rebuild the entire router store every time we get 32K of
2266 routers: rebuild it when the journal gets very large, or when
2267 the gaps in the store get very large.
2270 - When routers publish SVN revisions in their router descriptors,
2271 authorities now include those versions correctly in networkstatus
2273 - Warn when using a version of libevent before 1.3b to run a server on
2274 OSX or BSD: these versions interact badly with userspace threads.
2277 Changes in version 0.1.2.13 - 2007-04-24
2278 This release features some major anonymity fixes, such as safer path
2279 selection; better client performance; faster bootstrapping, better
2280 address detection, and better DNS support for servers; write limiting as
2281 well as read limiting to make servers easier to run; and a huge pile of
2282 other features and bug fixes. The bundles also ship with Vidalia 0.0.11.
2284 Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
2285 of the Freenode IRC network, remembering his patience and vision for
2286 free speech on the Internet.
2289 - Fix a memory leak when we ask for "all" networkstatuses and we
2290 get one we don't recognize.
2291 - Add more asserts to hunt down bug 417.
2292 - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
2295 Changes in version 0.1.2.12-rc - 2007-03-16
2297 - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
2298 directory information requested inside Tor connections (i.e. via
2299 begin_dir cells). It only triggered when the same connection was
2300 serving other data at the same time. Reported by seeess.
2303 - When creating a circuit via the controller, send a 'launched'
2304 event when we're done, so we follow the spec better.
2307 Changes in version 0.1.2.11-rc - 2007-03-15
2308 o Minor bugfixes (controller), reported by daejees:
2309 - Correct the control spec to match how the code actually responds
2310 to 'getinfo addr-mappings/*'.
2311 - The control spec described a GUARDS event, but the code
2312 implemented a GUARD event. Standardize on GUARD, but let people
2316 Changes in version 0.1.2.10-rc - 2007-03-07
2317 o Major bugfixes (Windows):
2318 - Do not load the NT services library functions (which may not exist)
2319 just to detect if we're a service trying to shut down. Now we run
2320 on Win98 and friends again.
2322 o Minor bugfixes (other):
2323 - Clarify a couple of log messages.
2324 - Fix a misleading socks5 error number.
2327 Changes in version 0.1.2.9-rc - 2007-03-02
2328 o Major bugfixes (Windows):
2329 - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
2330 of the usual GCC "%llu". This prevents a bug when saving 64-bit
2331 int configuration values: the high-order 32 bits would get
2332 truncated. In particular, we were being bitten by the default
2333 MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
2334 and maybe also bug 397.)
2336 o Minor bugfixes (performance):
2337 - Use OpenSSL's AES implementation on platforms where it's faster.
2338 This could save us as much as 10% CPU usage.
2340 o Minor bugfixes (server):
2341 - Do not rotate onion key immediately after setting it for the first
2344 o Minor bugfixes (directory authorities):
2345 - Stop calling servers that have been hibernating for a long time
2346 "stable". Also, stop letting hibernating or obsolete servers affect
2347 uptime and bandwidth cutoffs.
2348 - Stop listing hibernating servers in the v1 directory.
2350 o Minor bugfixes (hidden services):
2351 - Upload hidden service descriptors slightly less often, to reduce
2352 load on authorities.
2354 o Minor bugfixes (other):
2355 - Fix an assert that could trigger if a controller quickly set then
2356 cleared EntryNodes. (Bug found by Udo van den Heuvel.)
2357 - On architectures where sizeof(int)>4, still clamp declarable bandwidth
2359 - Fix a potential race condition in the rpm installer. Found by
2361 - Try to fix eventdns warnings once and for all: do not treat a dns rcode
2362 of 2 as indicating that the server is completely bad; it sometimes
2363 means that the server is just bad for the request in question. (may fix
2364 the last of bug 326.)
2365 - Disable encrypted directory connections when we don't have a server
2366 descriptor for the destination. We'll get this working again in
2370 Changes in version 0.1.2.8-beta - 2007-02-26
2371 o Major bugfixes (crashes):
2372 - Stop crashing when the controller asks us to resetconf more than
2373 one config option at once. (Vidalia 0.0.11 does this.)
2374 - Fix a crash that happened on Win98 when we're given command-line
2375 arguments: don't try to load NT service functions from advapi32.dll
2376 except when we need them. (Bug introduced in 0.1.2.7-alpha;
2378 - Fix a longstanding obscure crash bug that could occur when
2379 we run out of DNS worker processes. (Resolves bug 390.)
2381 o Major bugfixes (hidden services):
2382 - Correctly detect whether hidden service descriptor downloads are
2383 in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
2385 o Major bugfixes (accounting):
2386 - When we start during an accounting interval before it's time to wake
2387 up, remember to wake up at the correct time. (May fix bug 342.)
2389 o Minor bugfixes (controller):
2390 - Give the controller END_STREAM_REASON_DESTROY events _before_ we
2391 clear the corresponding on_circuit variable, and remember later
2392 that we don't need to send a redundant CLOSED event. (Resolves part
2394 - Report events where a resolve succeeded or where we got a socks
2395 protocol error correctly, rather than calling both of them
2397 - Change reported stream target addresses to IP consistently when
2398 we finally get the IP from an exit node.
2399 - Send log messages to the controller even if they happen to be very
2402 o Minor bugfixes (other):
2403 - Display correct results when reporting which versions are
2404 recommended, and how recommended they are. (Resolves bug 383.)
2405 - Improve our estimates for directory bandwidth to be less random:
2406 guess that an unrecognized directory will have the average bandwidth
2407 from all known directories, not that it will have the average
2408 bandwidth from those directories earlier than it on the list.
2409 - If we start a server with ClientOnly 1, then set ClientOnly to 0
2410 and hup, stop triggering an assert based on an empty onion_key.
2411 - On platforms with no working mmap() equivalent, don't warn the
2412 user when cached-routers doesn't exist.
2413 - Warn the user when mmap() [or its equivalent] fails for some reason
2414 other than file-not-found.
2415 - Don't warn the user when cached-routers.new doesn't exist: that's
2416 perfectly fine when starting up for the first time.
2417 - When EntryNodes are configured, rebuild the guard list to contain,
2418 in order: the EntryNodes that were guards before; the rest of the
2419 EntryNodes; the nodes that were guards before.
2420 - Mask out all signals in sub-threads; only the libevent signal
2421 handler should be processing them. This should prevent some crashes
2422 on some machines using pthreads. (Patch from coderman.)
2423 - Fix switched arguments on memset in the implementation of
2424 tor_munmap() for systems with no mmap() call.
2425 - When Tor receives a router descriptor that it asked for, but
2426 no longer wants (because it has received fresh networkstatuses
2427 in the meantime), do not warn the user. Cache the descriptor if
2428 we're a cache; drop it if we aren't.
2429 - Make earlier entry guards _really_ get retried when the network
2431 - On a malformed DNS reply, always give an error to the corresponding
2433 - Build with recent libevents on platforms that do not define the
2434 nonstandard types "u_int8_t" and friends.
2436 o Minor features (controller):
2437 - Warn the user when an application uses the obsolete binary v0
2438 control protocol. We're planning to remove support for it during
2439 the next development series, so it's good to give people some
2441 - Add STREAM_BW events to report per-entry-stream bandwidth
2442 use. (Patch from Robert Hogan.)
2443 - Rate-limit SIGNEWNYM signals in response to controllers that
2444 impolitely generate them for every single stream. (Patch from
2445 mwenge; closes bug 394.)
2446 - Make REMAP stream events have a SOURCE (cache or exit), and
2447 make them generated in every case where we get a successful
2448 connected or resolved cell.
2450 o Minor bugfixes (performance):
2451 - Call router_have_min_dir_info half as often. (This is showing up in
2452 some profiles, but not others.)
2453 - When using GCC, make log_debug never get called at all, and its
2454 arguments never get evaluated, when no debug logs are configured.
2455 (This is showing up in some profiles, but not others.)
2458 - Remove some never-implemented options. Mark PathlenCoinWeight as
2460 - Implement proposal 106: Stop requiring clients to have well-formed
2461 certificates; stop checking nicknames in certificates. (Clients
2462 have certificates so that they can look like Tor servers, but in
2463 the future we might want to allow them to look like regular TLS
2464 clients instead. Nicknames in certificates serve no purpose other
2465 than making our protocol easier to recognize on the wire.)
2466 - Revise messages on handshake failure again to be even more clear about
2467 which are incoming connections and which are outgoing.
2468 - Discard any v1 directory info that's over 1 month old (for
2469 directories) or over 1 week old (for running-routers lists).
2470 - Do not warn when individual nodes in the configuration's EntryNodes,
2471 ExitNodes, etc are down: warn only when all possible nodes
2472 are down. (Fixes bug 348.)
2473 - Always remove expired routers and networkstatus docs before checking
2474 whether we have enough information to build circuits. (Fixes
2476 - Put a lower-bound on MaxAdvertisedBandwidth.
2479 Changes in version 0.1.2.7-alpha - 2007-02-06
2480 o Major bugfixes (rate limiting):
2481 - Servers decline directory requests much more aggressively when
2482 they're low on bandwidth. Otherwise they end up queueing more and
2483 more directory responses, which can't be good for latency.
2484 - But never refuse directory requests from local addresses.
2485 - Fix a memory leak when sending a 503 response for a networkstatus
2487 - Be willing to read or write on local connections (e.g. controller
2488 connections) even when the global rate limiting buckets are empty.
2489 - If our system clock jumps back in time, don't publish a negative
2490 uptime in the descriptor. Also, don't let the global rate limiting
2491 buckets go absurdly negative.
2492 - Flush local controller connection buffers periodically as we're
2493 writing to them, so we avoid queueing 4+ megabytes of data before
2496 o Major bugfixes (NT services):
2497 - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
2498 command-line flag so that admins can override the default by saying
2499 "tor --service install --user "SomeUser"". This will not affect
2500 existing installed services. Also, warn the user that the service
2501 will look for its configuration file in the service user's
2502 %appdata% directory. (We can't do the 'hardwire the user's appdata
2503 directory' trick any more, since we may not have read access to that
2506 o Major bugfixes (other):
2507 - Previously, we would cache up to 16 old networkstatus documents
2508 indefinitely, if they came from nontrusted authorities. Now we
2509 discard them if they are more than 10 days old.
2510 - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
2512 - Detect and reject malformed DNS responses containing circular
2514 - If exits are rare enough that we're not marking exits as guards,
2515 ignore exit bandwidth when we're deciding the required bandwidth
2517 - When we're handling a directory connection tunneled over Tor,
2518 don't fill up internal memory buffers with all the data we want
2519 to tunnel; instead, only add it if the OR connection that will
2520 eventually receive it has some room for it. (This can lead to
2521 slowdowns in tunneled dir connections; a better solution will have
2524 o Minor bugfixes (dns):
2525 - Add some defensive programming to eventdns.c in an attempt to catch
2526 possible memory-stomping bugs.
2527 - Detect and reject DNS replies containing IPv4 or IPv6 records with
2528 an incorrect number of bytes. (Previously, we would ignore the
2530 - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
2531 in the correct order, and doesn't crash.
2532 - Free memory held in recently-completed DNS lookup attempts on exit.
2533 This was not a memory leak, but may have been hiding memory leaks.
2534 - Handle TTL values correctly on reverse DNS lookups.
2535 - Treat failure to parse resolv.conf as an error.
2537 o Minor bugfixes (other):
2538 - Fix crash with "tor --list-fingerprint" (reported by seeess).
2539 - When computing clock skew from directory HTTP headers, consider what
2540 time it was when we finished asking for the directory, not what
2542 - Expire socks connections if they spend too long waiting for the
2543 handshake to finish. Previously we would let them sit around for
2544 days, if the connecting application didn't close them either.
2545 - And if the socks handshake hasn't started, don't send a
2546 "DNS resolve socks failed" handshake reply; just close it.
2547 - Stop using C functions that OpenBSD's linker doesn't like.
2548 - Don't launch requests for descriptors unless we have networkstatuses
2549 from at least half of the authorities. This delays the first
2550 download slightly under pathological circumstances, but can prevent
2551 us from downloading a bunch of descriptors we don't need.
2552 - Do not log IPs with TLS failures for incoming TLS
2553 connections. (Fixes bug 382.)
2554 - If the user asks to use invalid exit nodes, be willing to use
2556 - Stop using the reserved ac_cv namespace in our configure script.
2557 - Call stat() slightly less often; use fstat() when possible.
2558 - Refactor the way we handle pending circuits when an OR connection
2559 completes or fails, in an attempt to fix a rare crash bug.
2560 - Only rewrite a conn's address based on X-Forwarded-For: headers
2561 if it's a parseable public IP address; and stop adding extra quotes
2562 to the resulting address.
2565 - Weight directory requests by advertised bandwidth. Now we can
2566 let servers enable write limiting but still allow most clients to
2567 succeed at their directory requests. (We still ignore weights when
2568 choosing a directory authority; I hope this is a feature.)
2571 - Create a new file ReleaseNotes which was the old ChangeLog. The
2572 new ChangeLog file now includes the summaries for all development
2574 - Check for addresses with invalid characters at the exit as well
2575 as at the client, and warn less verbosely when they fail. You can
2576 override this by setting ServerDNSAllowNonRFC953Addresses to 1.
2577 - Adapt a patch from goodell to let the contrib/exitlist script
2578 take arguments rather than require direct editing.
2579 - Inform the server operator when we decide not to advertise a
2580 DirPort due to AccountingMax enabled or a low BandwidthRate. It
2581 was confusing Zax, so now we're hopefully more helpful.
2582 - Bring us one step closer to being able to establish an encrypted
2583 directory tunnel without knowing a descriptor first. Still not
2584 ready yet. As part of the change, now assume we can use a
2585 create_fast cell if we don't know anything about a router.
2586 - Allow exit nodes to use nameservers running on ports other than 53.
2587 - Servers now cache reverse DNS replies.
2588 - Add an --ignore-missing-torrc command-line option so that we can
2589 get the "use sensible defaults if the configuration file doesn't
2590 exist" behavior even when specifying a torrc location on the command
2593 o Minor features (controller):
2594 - Track reasons for OR connection failure; make these reasons
2595 available via the controller interface. (Patch from Mike Perry.)
2596 - Add a SOCKS_BAD_HOSTNAME client status event so controllers
2597 can learn when clients are sending malformed hostnames to Tor.
2598 - Clean up documentation for controller status events.
2599 - Add a REMAP status to stream events to note that a stream's
2600 address has changed because of a cached address or a MapAddress
2604 Changes in version 0.1.2.6-alpha - 2007-01-09
2606 - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
2607 connection handles more than 4 gigs in either direction, we crash.
2608 - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
2609 advertised exit node, somebody might try to exit from us when
2610 we're bootstrapping and before we've built our descriptor yet.
2611 Refuse the connection rather than crashing.
2614 - Warn if we (as a server) find that we've resolved an address that we
2615 weren't planning to resolve.
2616 - Warn that using select() on any libevent version before 1.1 will be
2617 unnecessarily slow (even for select()).
2618 - Flush ERR-level controller status events just like we currently
2619 flush ERR-level log events, so that a Tor shutdown doesn't prevent
2620 the controller from learning about current events.
2622 o Minor features (more controller status events):
2623 - Implement EXTERNAL_ADDRESS server status event so controllers can
2624 learn when our address changes.
2625 - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
2626 can learn when directories reject our descriptor.
2627 - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
2628 can learn when a client application is speaking a non-socks protocol
2630 - Implement DANGEROUS_SOCKS client status event so controllers
2631 can learn when a client application is leaking DNS addresses.
2632 - Implement BUG general status event so controllers can learn when
2633 Tor is unhappy about its internal invariants.
2634 - Implement CLOCK_SKEW general status event so controllers can learn
2635 when Tor thinks the system clock is set incorrectly.
2636 - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
2637 server status events so controllers can learn when their descriptors
2638 are accepted by a directory.
2639 - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
2640 server status events so controllers can learn about Tor's progress in
2641 deciding whether it's reachable from the outside.
2642 - Implement BAD_LIBEVENT general status event so controllers can learn
2643 when we have a version/method combination in libevent that needs to
2645 - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
2646 and DNS_USELESS server status events so controllers can learn
2647 about changes to DNS server status.
2649 o Minor features (directory):
2650 - Authorities no longer recommend exits as guards if this would shift
2651 too much load to the exit nodes.
2654 Changes in version 0.1.2.5-alpha - 2007-01-06
2656 - Enable write limiting as well as read limiting. Now we sacrifice
2657 capacity if we're pushing out lots of directory traffic, rather
2658 than overrunning the user's intended bandwidth limits.
2659 - Include TLS overhead when counting bandwidth usage; previously, we
2660 would count only the bytes sent over TLS, but not the bytes used
2662 - Support running the Tor service with a torrc not in the same
2663 directory as tor.exe and default to using the torrc located in
2664 the %appdata%\Tor\ of the user who installed the service. Patch
2666 - Servers now check for the case when common DNS requests are going to
2667 wildcarded addresses (i.e. all getting the same answer), and change
2668 their exit policy to reject *:* if it's happening.
2669 - Implement BEGIN_DIR cells, so we can connect to the directory
2670 server via TLS to do encrypted directory requests rather than
2671 plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
2672 config options if you like.
2674 o Minor features (config and docs):
2675 - Start using the state file to store bandwidth accounting data:
2676 the bw_accounting file is now obsolete. We'll keep generating it
2677 for a while for people who are still using 0.1.2.4-alpha.
2678 - Try to batch changes to the state file so that we do as few
2679 disk writes as possible while still storing important things in
2681 - The state file and the bw_accounting file get saved less often when
2682 the AvoidDiskWrites config option is set.
2683 - Make PIDFile work on Windows (untested).
2684 - Add internal descriptions for a bunch of configuration options:
2685 accessible via controller interface and in comments in saved
2687 - Reject *:563 (NNTPS) in the default exit policy. We already reject
2688 NNTP by default, so this seems like a sensible addition.
2689 - Clients now reject hostnames with invalid characters. This should
2690 avoid some inadvertent info leaks. Add an option
2691 AllowNonRFC953Hostnames to disable this behavior, in case somebody
2692 is running a private network with hosts called @, !, and #.
2693 - Add a maintainer script to tell us which options are missing
2694 documentation: "make check-docs".
2695 - Add a new address-spec.txt document to describe our special-case
2696 addresses: .exit, .onion, and .noconnnect.
2698 o Minor features (DNS):
2699 - Ongoing work on eventdns infrastructure: now it has dns server
2700 and ipv6 support. One day Tor will make use of it.
2701 - Add client-side caching for reverse DNS lookups.
2702 - Add support to tor-resolve tool for reverse lookups and SOCKS5.
2703 - When we change nameservers or IP addresses, reset and re-launch
2704 our tests for DNS hijacking.
2706 o Minor features (directory):
2707 - Authorities now specify server versions in networkstatus. This adds
2708 about 2% to the size of compressed networkstatus docs, and allows
2709 clients to tell which servers support BEGIN_DIR and which don't.
2710 The implementation is forward-compatible with a proposed future
2711 protocol version scheme not tied to Tor versions.
2712 - DirServer configuration lines now have an orport= option so
2713 clients can open encrypted tunnels to the authorities without
2714 having downloaded their descriptors yet. Enabled for moria1,
2715 moria2, tor26, and lefkada now in the default configuration.
2716 - Directory servers are more willing to send a 503 "busy" if they
2717 are near their write limit, especially for v1 directory requests.
2718 Now they can use their limited bandwidth for actual Tor traffic.
2719 - Clients track responses with status 503 from dirservers. After a
2720 dirserver has given us a 503, we try not to use it until an hour has
2721 gone by, or until we have no dirservers that haven't given us a 503.
2722 - When we get a 503 from a directory, and we're not a server, we don't
2723 count the failure against the total number of failures allowed
2724 for the thing we're trying to download.
2725 - Report X-Your-Address-Is correctly from tunneled directory
2726 connections; don't report X-Your-Address-Is when it's an internal
2727 address; and never believe reported remote addresses when they're
2729 - Protect against an unlikely DoS attack on directory servers.
2730 - Add a BadDirectory flag to network status docs so that authorities
2731 can (eventually) tell clients about caches they believe to be
2734 o Minor features (controller):
2735 - Have GETINFO dir/status/* work on hosts with DirPort disabled.
2736 - Reimplement GETINFO so that info/names stays in sync with the
2738 - Implement "GETINFO fingerprint".
2739 - Implement "SETEVENTS GUARD" so controllers can get updates on
2740 entry guard status as it changes.
2742 o Minor features (clean up obsolete pieces):
2743 - Remove some options that have been deprecated since at least
2744 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
2745 SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
2747 - We no longer look for identity and onion keys in "identity.key" and
2748 "onion.key" -- these were replaced by secret_id_key and
2749 secret_onion_key in 0.0.8pre1.
2750 - We no longer require unrecognized directory entries to be
2753 o Major bugfixes (security):
2754 - Stop sending the HttpProxyAuthenticator string to directory
2755 servers when directory connections are tunnelled through Tor.
2756 - Clients no longer store bandwidth history in the state file.
2757 - Do not log introduction points for hidden services if SafeLogging
2759 - When generating bandwidth history, round down to the nearest
2760 1k. When storing accounting data, round up to the nearest 1k.
2761 - When we're running as a server, remember when we last rotated onion
2762 keys, so that we will rotate keys once they're a week old even if
2763 we never stay up for a week ourselves.
2765 o Major bugfixes (other):
2766 - Fix a longstanding bug in eventdns that prevented the count of
2767 timed-out resolves from ever being reset. This bug caused us to
2768 give up on a nameserver the third time it timed out, and try it
2769 10 seconds later... and to give up on it every time it timed out
2771 - Take out the '5 second' timeout from the connection retry
2772 schedule. Now the first connect attempt will wait a full 10
2773 seconds before switching to a new circuit. Perhaps this will help
2774 a lot. Based on observations from Mike Perry.
2775 - Fix a bug on the Windows implementation of tor_mmap_file() that
2776 would prevent the cached-routers file from ever loading. Reported
2780 - Fix an assert failure when a directory authority sets
2781 AuthDirRejectUnlisted and then receives a descriptor from an
2782 unlisted router. Reported by seeess.
2783 - Avoid a double-free when parsing malformed DirServer lines.
2784 - Fix a bug when a BSD-style PF socket is first used. Patch from
2786 - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
2787 to resolve an address at a given exit node even when they ask for
2789 - Servers no longer ever list themselves in their "family" line,
2790 even if configured to do so. This makes it easier to configure
2791 family lists conveniently.
2792 - When running as a server, don't fall back to 127.0.0.1 when no
2793 nameservers are configured in /etc/resolv.conf; instead, make the
2794 user fix resolv.conf or specify nameservers explicitly. (Resolves
2796 - Stop accepting certain malformed ports in configured exit policies.
2797 - Don't re-write the fingerprint file every restart, unless it has
2799 - Stop warning when a single nameserver fails: only warn when _all_ of
2800 our nameservers have failed. Also, when we only have one nameserver,
2801 raise the threshold for deciding that the nameserver is dead.
2802 - Directory authorities now only decide that routers are reachable
2803 if their identity keys are as expected.
2804 - When the user uses bad syntax in the Log config line, stop
2805 suggesting other bad syntax as a replacement.
2806 - Correctly detect ipv6 DNS capability on OpenBSD.
2808 o Minor bugfixes (controller):
2809 - Report the circuit number correctly in STREAM CLOSED events. Bug
2810 reported by Mike Perry.
2811 - Do not report bizarre values for results of accounting GETINFOs
2812 when the last second's write or read exceeds the allotted bandwidth.
2813 - Report "unrecognized key" rather than an empty string when the
2814 controller tries to fetch a networkstatus that doesn't exist.
2817 Changes in version 0.1.1.26 - 2006-12-14
2818 o Security bugfixes:
2819 - Stop sending the HttpProxyAuthenticator string to directory
2820 servers when directory connections are tunnelled through Tor.
2821 - Clients no longer store bandwidth history in the state file.
2822 - Do not log introduction points for hidden services if SafeLogging
2826 - Fix an assert failure when a directory authority sets
2827 AuthDirRejectUnlisted and then receives a descriptor from an
2828 unlisted router (reported by seeess).
2831 Changes in version 0.1.2.4-alpha - 2006-12-03
2833 - Add support for using natd; this allows FreeBSDs earlier than
2834 5.1.2 to have ipfw send connections through Tor without using
2835 SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
2838 - Make all connections to addresses of the form ".noconnect"
2839 immediately get closed. This lets application/controller combos
2840 successfully test whether they're talking to the same Tor by
2841 watching for STREAM events.
2842 - Make cross.sh cross-compilation script work even when autogen.sh
2843 hasn't been run. (Patch from Michael Mohr.)
2844 - Statistics dumped by -USR2 now include a breakdown of public key
2845 operations, for profiling.
2848 - Fix a major leak when directory authorities parse their
2849 approved-routers list, a minor memory leak when we fail to pick
2850 an exit node, and a few rare leaks on errors.
2851 - Handle TransPort connections even when the server sends data before
2852 the client sends data. Previously, the connection would just hang
2853 until the client sent data. (Patch from tup based on patch from
2855 - Avoid assert failure when our cached-routers file is empty on
2859 - Don't log spurious warnings when we see a circuit close reason we
2860 don't recognize; it's probably just from a newer version of Tor.
2861 - Have directory authorities allow larger amounts of drift in uptime
2862 without replacing the server descriptor: previously, a server that
2863 restarted every 30 minutes could have 48 "interesting" descriptors
2865 - Start linking to the Tor specification and Tor reference manual
2866 correctly in the Windows installer.
2867 - Add Vidalia to the OS X uninstaller script, so when we uninstall
2868 Tor/Privoxy we also uninstall Vidalia.
2869 - Resume building on Irix64, and fix a lot of warnings from its
2871 - Don't corrupt last_guessed_ip in router_new_address_suggestion()
2872 when we're running as a client.
2875 Changes in version 0.1.1.25 - 2006-11-04
2877 - When a client asks us to resolve (rather than connect to)
2878 an address, and we have a cached answer, give them the cached
2879 answer. Previously, we would give them no answer at all.
2880 - We were building exactly the wrong circuits when we predict
2881 hidden service requirements, meaning Tor would have to build all
2882 its circuits on demand.
2883 - If none of our live entry guards have a high uptime, but we
2884 require a guard with a high uptime, try adding a new guard before
2885 we give up on the requirement. This patch should make long-lived
2886 connections more stable on average.
2887 - When testing reachability of our DirPort, don't launch new
2888 tests when there's already one in progress -- unreachable
2889 servers were stacking up dozens of testing streams.
2891 o Security bugfixes:
2892 - When the user sends a NEWNYM signal, clear the client-side DNS
2893 cache too. Otherwise we continue to act on previous information.
2896 - Avoid a memory corruption bug when creating a hash table for
2898 - Avoid possibility of controller-triggered crash when misusing
2899 certain commands from a v0 controller on platforms that do not
2900 handle printf("%s",NULL) gracefully.
2901 - Avoid infinite loop on unexpected controller input.
2902 - Don't log spurious warnings when we see a circuit close reason we
2903 don't recognize; it's probably just from a newer version of Tor.
2904 - Add Vidalia to the OS X uninstaller script, so when we uninstall
2905 Tor/Privoxy we also uninstall Vidalia.
2908 Changes in version 0.1.2.3-alpha - 2006-10-29
2910 - Prepare for servers to publish descriptors less often: never
2911 discard a descriptor simply for being too old until either it is
2912 recommended by no authorities, or until we get a better one for
2913 the same router. Make caches consider retaining old recommended
2914 routers for even longer.
2915 - If most authorities set a BadExit flag for a server, clients
2916 don't think of it as a general-purpose exit. Clients only consider
2917 authorities that advertise themselves as listing bad exits.
2918 - Directory servers now provide 'Pragma: no-cache' and 'Expires'
2919 headers for content, so that we can work better in the presence of
2920 caching HTTP proxies.
2921 - Allow authorities to list nodes as bad exits by fingerprint or by
2924 o Minor features, controller:
2925 - Add a REASON field to CIRC events; for backward compatibility, this
2926 field is sent only to controllers that have enabled the extended
2927 event format. Also, add additional reason codes to explain why
2928 a given circuit has been destroyed or truncated. (Patches from
2930 - Add a REMOTE_REASON field to extended CIRC events to tell the
2931 controller about why a remote OR told us to close a circuit.
2932 - Stream events also now have REASON and REMOTE_REASON fields,
2933 working much like those for circuit events.
2934 - There's now a GETINFO ns/... field so that controllers can ask Tor
2935 about the current status of a router.
2936 - A new event type "NS" to inform a controller when our opinion of
2937 a router's status has changed.
2938 - Add a GETINFO events/names and GETINFO features/names so controllers
2939 can tell which events and features are supported.
2940 - A new CLEARDNSCACHE signal to allow controllers to clear the
2941 client-side DNS cache without expiring circuits.
2943 o Security bugfixes:
2944 - When the user sends a NEWNYM signal, clear the client-side DNS
2945 cache too. Otherwise we continue to act on previous information.
2948 - Avoid sending junk to controllers or segfaulting when a controller
2949 uses EVENT_NEW_DESC with verbose nicknames.
2950 - Stop triggering asserts if the controller tries to extend hidden
2951 service circuits (reported by mwenge).
2952 - Avoid infinite loop on unexpected controller input.
2953 - When the controller does a "GETINFO network-status", tell it
2954 about even those routers whose descriptors are very old, and use
2955 long nicknames where appropriate.
2956 - Change NT service functions to be loaded on demand. This lets us
2957 build with MinGW without breaking Tor for Windows 98 users.
2958 - Do DirPort reachability tests less often, since a single test
2959 chews through many circuits before giving up.
2960 - In the hidden service example in torrc.sample, stop recommending
2961 esoteric and discouraged hidden service options.
2962 - When stopping an NT service, wait up to 10 sec for it to actually
2963 stop. (Patch from Matt Edman; resolves bug 295.)
2964 - Fix handling of verbose nicknames with ORCONN controller events:
2965 make them show up exactly when requested, rather than exactly when
2967 - When reporting verbose nicknames in entry_guards_getinfo(), avoid
2968 printing a duplicate "$" in the keys we send (reported by mwenge).
2969 - Correctly set maximum connection limit on Cygwin. (This time
2971 - Try to detect Windows correctly when cross-compiling.
2972 - Detect the size of the routers file correctly even if it is
2973 corrupted (on systems without mmap) or not page-aligned (on systems
2974 with mmap). This bug was harmless.
2975 - Sometimes we didn't bother sending a RELAY_END cell when an attempt
2976 to open a stream fails; now we do in more cases. This should
2977 make clients able to find a good exit faster in some cases, since
2978 unhandleable requests will now get an error rather than timing out.
2979 - Resolve two memory leaks when rebuilding the on-disk router cache
2980 (reported by fookoowa).
2981 - Clean up minor code warnings suggested by the MIPSpro C compiler,
2982 and reported by some Centos users.
2983 - Controller signals now work on non-Unix platforms that don't define
2984 SIGUSR1 and SIGUSR2 the way we expect.
2985 - Patch from Michael Mohr to contrib/cross.sh, so it checks more
2986 values before failing, and always enables eventdns.
2987 - Libevent-1.2 exports, but does not define in its headers, strlcpy.
2988 Try to fix this in configure.in by checking for most functions
2989 before we check for libevent.
2992 Changes in version 0.1.2.2-alpha - 2006-10-07
2994 - Make our async eventdns library on-by-default for Tor servers,
2995 and plan to deprecate the separate dnsworker threads.
2996 - Add server-side support for "reverse" DNS lookups (using PTR
2997 records so clients can determine the canonical hostname for a given
2998 IPv4 address). Only supported by servers using eventdns; servers
2999 now announce in their descriptors whether they support eventdns.
3000 - Specify and implement client-side SOCKS5 interface for reverse DNS
3001 lookups (see doc/socks-extensions.txt).
3002 - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
3003 connect to directory servers through Tor. Previously, clients needed
3004 to find Tor exits to make private connections to directory servers.
3005 - Avoid choosing Exit nodes for entry or middle hops when the
3006 total bandwidth available from non-Exit nodes is much higher than
3007 the total bandwidth available from Exit nodes.
3008 - Workaround for name servers (like Earthlink's) that hijack failing
3009 DNS requests and replace the no-such-server answer with a "helpful"
3010 redirect to an advertising-driven search portal. Also work around
3011 DNS hijackers who "helpfully" decline to hijack known-invalid
3012 RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
3013 lets you turn it off.
3014 - Send out a burst of long-range padding cells once we've established
3015 that we're reachable. Spread them over 4 circuits, so hopefully
3016 a few will be fast. This exercises our bandwidth and bootstraps
3017 us into the directory more quickly.
3019 o New/improved config options:
3020 - Add new config option "ResolvConf" to let the server operator
3021 choose an alternate resolve.conf file when using eventdns.
3022 - Add an "EnforceDistinctSubnets" option to control our "exclude
3023 servers on the same /16" behavior. It's still on by default; this
3024 is mostly for people who want to operate private test networks with
3025 all the machines on the same subnet.
3026 - If one of our entry guards is on the ExcludeNodes list, or the
3027 directory authorities don't think it's a good guard, treat it as
3028 if it were unlisted: stop using it as a guard, and throw it off
3029 the guards list if it stays that way for a long time.
3030 - Allow directory authorities to be marked separately as authorities
3031 for the v1 directory protocol, the v2 directory protocol, and
3032 as hidden service directories, to make it easier to retire old
3033 authorities. V1 authorities should set "HSAuthoritativeDir 1"
3034 to continue being hidden service authorities too.
3035 - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
3037 o Minor features, controller:
3038 - Fix CIRC controller events so that controllers can learn the
3039 identity digests of non-Named servers used in circuit paths.
3040 - Let controllers ask for more useful identifiers for servers. Instead
3041 of learning identity digests for un-Named servers and nicknames
3042 for Named servers, the new identifiers include digest, nickname,
3043 and indication of Named status. Off by default; see control-spec.txt
3044 for more information.
3045 - Add a "getinfo address" controller command so it can display Tor's
3046 best guess to the user.
3047 - New controller event to alert the controller when our server
3048 descriptor has changed.
3049 - Give more meaningful errors on controller authentication failure.
3051 o Minor features, other:
3052 - When asked to resolve a hostname, don't use non-exit servers unless
3053 requested to do so. This allows servers with broken DNS to be
3054 useful to the network.
3055 - Divide eventdns log messages into warn and info messages.
3056 - Reserve the nickname "Unnamed" for routers that can't pick
3057 a hostname: any router can call itself Unnamed; directory
3058 authorities will never allocate Unnamed to any particular router;
3059 clients won't believe that any router is the canonical Unnamed.
3060 - Only include function names in log messages for info/debug messages.
3061 For notice/warn/err, the content of the message should be clear on
3062 its own, and printing the function name only confuses users.
3063 - Avoid some false positives during reachability testing: don't try
3064 to test via a server that's on the same /24 as us.
3065 - If we fail to build a circuit to an intended enclave, and it's
3066 not mandatory that we use that enclave, stop wanting it.
3067 - When eventdns is enabled, allow multithreaded builds on NetBSD and
3068 OpenBSD. (We had previously disabled threads on these platforms
3069 because they didn't have working thread-safe resolver functions.)
3071 o Major bugfixes, anonymity/security:
3072 - If a client asked for a server by name, and there's a named server
3073 in our network-status but we don't have its descriptor yet, we
3074 could return an unnamed server instead.
3075 - Fix NetBSD bug that could allow someone to force uninitialized RAM
3076 to be sent to a server's DNS resolver. This only affects NetBSD
3077 and other platforms that do not bounds-check tolower().
3078 - Reject (most) attempts to use Tor circuits with length one. (If
3079 many people start using Tor as a one-hop proxy, exit nodes become
3080 a more attractive target for compromise.)
3081 - Just because your DirPort is open doesn't mean people should be
3082 able to remotely teach you about hidden service descriptors. Now
3083 only accept rendezvous posts if you've got HSAuthoritativeDir set.
3085 o Major bugfixes, other:
3086 - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
3087 - When a client asks the server to resolve (not connect to)
3088 an address, and it has a cached answer, give them the cached answer.
3089 Previously, the server would give them no answer at all.
3090 - Allow really slow clients to not hang up five minutes into their
3091 directory downloads (suggested by Adam J. Richter).
3092 - We were building exactly the wrong circuits when we anticipated
3093 hidden service requirements, meaning Tor would have to build all
3094 its circuits on demand.
3095 - Avoid crashing when we mmap a router cache file of size 0.
3096 - When testing reachability of our DirPort, don't launch new
3097 tests when there's already one in progress -- unreachable
3098 servers were stacking up dozens of testing streams.
3100 o Minor bugfixes, correctness:
3101 - If we're a directory mirror and we ask for "all" network status
3102 documents, we would discard status documents from authorities
3104 - Avoid a memory corruption bug when creating a hash table for
3106 - Avoid controller-triggered crash when misusing certain commands
3107 from a v0 controller on platforms that do not handle
3108 printf("%s",NULL) gracefully.
3109 - Don't crash when a controller sends a third argument to an
3110 "extendcircuit" request.
3111 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
3112 response; fix error code when "getinfo dir/status/" fails.
3113 - Avoid crash when telling controller stream-status and a stream
3115 - Patch from Adam Langley to fix assert() in eventdns.c.
3116 - Fix a debug log message in eventdns to say "X resolved to Y"
3117 instead of "X resolved to X".
3118 - Make eventdns give strings for DNS errors, not just error numbers.
3119 - Track unreachable entry guards correctly: don't conflate
3120 'unreachable by us right now' with 'listed as down by the directory
3121 authorities'. With the old code, if a guard was unreachable by
3122 us but listed as running, it would clog our guard list forever.
3123 - Behave correctly in case we ever have a network with more than
3124 2GB/s total advertised capacity.
3125 - Make TrackExitHosts case-insensitive, and fix the behavior of
3126 ".suffix" TrackExitHosts items to avoid matching in the middle of
3128 - Finally fix the openssl warnings from newer gccs that believe that
3129 ignoring a return value is okay, but casting a return value and
3130 then ignoring it is a sign of madness.
3131 - Prevent the contrib/exitlist script from printing the same
3132 result more than once.
3133 - Patch from Steve Hildrey: Generate network status correctly on
3134 non-versioning dirservers.
3135 - Don't listen to the X-Your-Address-Is hint if you did the lookup
3136 via Tor; otherwise you'll think you're the exit node's IP address.
3138 o Minor bugfixes, performance:
3139 - Two small performance improvements on parsing descriptors.
3140 - Major performance improvement on inserting descriptors: change
3141 algorithm from O(n^2) to O(n).
3142 - Make the common memory allocation path faster on machines where
3143 malloc(0) returns a pointer.
3144 - Start remembering X-Your-Address-Is directory hints even if you're
3145 a client, so you can become a server more smoothly.
3146 - Avoid duplicate entries on MyFamily line in server descriptor.
3148 o Packaging, features:
3149 - Remove architecture from OS X builds. The official builds are
3150 now universal binaries.
3151 - The Debian package now uses --verify-config when (re)starting,
3152 to distinguish configuration errors from other errors.
3153 - Update RPMs to require libevent 1.1b.
3155 o Packaging, bugfixes:
3156 - Patches so Tor builds with MinGW on Windows.
3157 - Patches so Tor might run on Cygwin again.
3158 - Resume building on non-gcc compilers and ancient gcc. Resume
3159 building with the -O0 compile flag. Resume building cleanly on
3161 - Run correctly on OS X platforms with case-sensitive filesystems.
3162 - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
3163 - Add autoconf checks so Tor can build on Solaris x86 again.
3166 - Documented (and renamed) ServerDNSSearchDomains and
3167 ServerDNSResolvConfFile options.
3168 - Be clearer that the *ListenAddress directives can be repeated
3172 Changes in version 0.1.1.24 - 2006-09-29
3174 - Allow really slow clients to not hang up five minutes into their
3175 directory downloads (suggested by Adam J. Richter).
3176 - Fix major performance regression from 0.1.0.x: instead of checking
3177 whether we have enough directory information every time we want to
3178 do something, only check when the directory information has changed.
3179 This should improve client CPU usage by 25-50%.
3180 - Don't crash if, after a server has been running for a while,
3181 it can't resolve its hostname.
3184 - Allow Tor to start when RunAsDaemon is set but no logs are set.
3185 - Don't crash when the controller receives a third argument to an
3186 "extendcircuit" request.
3187 - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
3188 response; fix error code when "getinfo dir/status/" fails.
3189 - Fix configure.in to not produce broken configure files with
3190 more recent versions of autoconf. Thanks to Clint for his auto*
3192 - Fix security bug on NetBSD that could allow someone to force
3193 uninitialized RAM to be sent to a server's DNS resolver. This
3194 only affects NetBSD and other platforms that do not bounds-check
3196 - Warn user when using libevent 1.1a or earlier with win32 or kqueue
3197 methods: these are known to be buggy.
3198 - If we're a directory mirror and we ask for "all" network status
3199 documents, we would discard status documents from authorities
3203 Changes in version 0.1.2.1-alpha - 2006-08-27
3205 - Add "eventdns" async dns library from Adam Langley, tweaked to
3206 build on OSX and Windows. Only enabled if you pass the
3207 --enable-eventdns argument to configure.
3208 - Allow servers with no hostname or IP address to learn their
3209 IP address by asking the directory authorities. This code only
3210 kicks in when you would normally have exited with a "no address"
3211 error. Nothing's authenticated, so use with care.
3212 - Rather than waiting a fixed amount of time between retrying
3213 application connections, we wait only 5 seconds for the first,
3214 10 seconds for the second, and 15 seconds for each retry after
3215 that. Hopefully this will improve the expected user experience.
3216 - Patch from Tup to add support for transparent AP connections:
3217 this basically bundles the functionality of trans-proxy-tor
3218 into the Tor mainline. Now hosts with compliant pf/netfilter
3219 implementations can redirect TCP connections straight to Tor
3220 without diverting through SOCKS. Needs docs.
3221 - Busy directory servers save lots of memory by spooling server
3222 descriptors, v1 directories, and v2 networkstatus docs to buffers
3223 as needed rather than en masse. Also mmap the cached-routers
3224 files, so we don't need to keep the whole thing in memory too.
3225 - Automatically avoid picking more than one node from the same
3226 /16 network when constructing a circuit.
3227 - Revise and clean up the torrc.sample that we ship with; add
3228 a section for BandwidthRate and BandwidthBurst.
3231 - Split circuit_t into origin_circuit_t and or_circuit_t, and
3232 split connection_t into edge, or, dir, control, and base structs.
3233 These will save quite a bit of memory on busy servers, and they'll
3234 also help us track down bugs in the code and bugs in the spec.
3235 - Experimentally re-enable kqueue on OSX when using libevent 1.1b
3236 or later. Log when we are doing this, so we can diagnose it when
3237 it fails. (Also, recommend libevent 1.1b for kqueue and
3238 win32 methods; deprecate libevent 1.0b harder; make libevent
3239 recommendation system saner.)
3240 - Start being able to build universal binaries on OS X (thanks
3242 - Export the default exit policy via the control port, so controllers
3243 don't need to guess what it is / will be later.
3244 - Add a man page entry for ProtocolWarnings.
3245 - Add TestVia config option to the man page.
3246 - Remove even more protocol-related warnings from Tor server logs,
3247 such as bad TLS handshakes and malformed begin cells.
3248 - Stop fetching descriptors if you're not a dir mirror and you
3249 haven't tried to establish any circuits lately. [This currently
3250 causes some dangerous behavior, because when you start up again
3251 you'll use your ancient server descriptors.]
3252 - New DirPort behavior: if you have your dirport set, you download
3253 descriptors aggressively like a directory mirror, whether or not
3255 - Get rid of the router_retry_connections notion. Now routers
3256 no longer try to rebuild long-term connections to directory
3257 authorities, and directory authorities no longer try to rebuild
3258 long-term connections to all servers. We still don't hang up
3259 connections in these two cases though -- we need to look at it
3260 more carefully to avoid flapping, and we likely need to wait til
3261 0.1.1.x is obsolete.
3262 - Drop compatibility with obsolete Tors that permit create cells
3263 to have the wrong circ_id_type.
3264 - Re-enable per-connection rate limiting. Get rid of the "OP
3265 bandwidth" concept. Lay groundwork for "bandwidth classes" --
3266 separate global buckets that apply depending on what sort of conn
3268 - Start publishing one minute or so after we find our ORPort
3269 to be reachable. This will help reduce the number of descriptors
3270 we have for ourselves floating around, since it's quite likely
3271 other things (e.g. DirPort) will change during that minute too.
3272 - Fork the v1 directory protocol into its own spec document,
3273 and mark dir-spec.txt as the currently correct (v2) spec.
3276 - When we find our DirPort to be reachable, publish a new descriptor
3277 so we'll tell the world (reported by pnx).
3278 - Publish a new descriptor after we hup/reload. This is important
3279 if our config has changed such that we'll want to start advertising
3280 our DirPort now, etc.
3281 - Allow Tor to start when RunAsDaemon is set but no logs are set.
3282 - When we have a state file we cannot parse, tell the user and
3283 move it aside. Now we avoid situations where the user starts
3284 Tor in 1904, Tor writes a state file with that timestamp in it,
3285 the user fixes her clock, and Tor refuses to start.
3286 - Fix configure.in to not produce broken configure files with
3287 more recent versions of autoconf. Thanks to Clint for his auto*
3289 - "tor --verify-config" now exits with -1(255) or 0 depending on
3290 whether the config options are bad or good.
3291 - Resolve bug 321 when using dnsworkers: append a period to every
3292 address we resolve at the exit node, so that we do not accidentally
3293 pick up local addresses, and so that failing searches are retried
3294 in the resolver search domains. (This is already solved for
3295 eventdns.) (This breaks Blossom servers for now.)
3296 - If we are using an exit enclave and we can't connect, e.g. because
3297 its webserver is misconfigured to not listen on localhost, then
3298 back off and try connecting from somewhere else before we fail.
3301 - Start compiling on MinGW on Windows (patches from Mike Chiussi).
3302 - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
3303 - Fix bug 314: Tor clients issued "unsafe socks" warnings even
3304 when the IP address is mapped through MapAddress to a hostname.
3305 - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
3306 useless IPv6 DNS resolves.
3307 - Patch suggested by Karsten Loesing: respond to SIGNAL command
3308 before we execute the signal, in case the signal shuts us down.
3309 - Clean up AllowInvalidNodes man page entry.
3310 - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
3311 - Add more asserts to track down an assert error on a windows Tor
3312 server with connection_add being called with socket == -1.
3313 - Handle reporting OR_CONN_EVENT_NEW events to the controller.
3314 - Fix misleading log messages: an entry guard that is "unlisted",
3315 as well as not known to be "down" (because we've never heard
3316 of it), is not therefore "up".
3317 - Remove code to special-case "-cvs" ending, since it has not
3318 actually mattered since 0.0.9.
3319 - Make our socks5 handling more robust to broken socks clients:
3320 throw out everything waiting on the buffer in between socks
3321 handshake phases, since they can't possibly (so the theory
3322 goes) have predicted what we plan to respond to them.
3325 Changes in version 0.1.1.23 - 2006-07-30
3327 - Fast Tor servers, especially exit nodes, were triggering asserts
3328 due to a bug in handling the list of pending DNS resolves. Some
3329 bugs still remain here; we're hunting them.
3330 - Entry guards could crash clients by sending unexpected input.
3331 - More fixes on reachability testing: if you find yourself reachable,
3332 then don't ever make any client requests (so you stop predicting
3333 circuits), then hup or have your clock jump, then later your IP
3334 changes, you won't think circuits are working, so you won't try to
3335 test reachability, so you won't publish.
3338 - Avoid a crash if the controller does a resetconf firewallports
3339 and then a setconf fascistfirewall=1.
3340 - Avoid an integer underflow when the dir authority decides whether
3341 a router is stable: we might wrongly label it stable, and compute
3342 a slightly wrong median stability, when a descriptor is published
3344 - Fix a place where we might trigger an assert if we can't build our
3345 own server descriptor yet.
3348 Changes in version 0.1.1.22 - 2006-07-05
3350 - Fix a big bug that was causing servers to not find themselves
3351 reachable if they changed IP addresses. Since only 0.1.1.22+
3352 servers can do reachability testing correctly, now we automatically
3353 make sure to test via one of these.
3354 - Fix to allow clients and mirrors to learn directory info from
3355 descriptor downloads that get cut off partway through.
3356 - Directory authorities had a bug in deciding if a newly published
3357 descriptor was novel enough to make everybody want a copy -- a few
3358 servers seem to be publishing new descriptors many times a minute.
3360 - Fix a rare bug that was causing some servers to complain about
3361 "closing wedged cpuworkers" and skip some circuit create requests.
3362 - Make the Exit flag in directory status documents actually work.
3365 Changes in version 0.1.1.21 - 2006-06-10
3366 o Crash and assert fixes from 0.1.1.20:
3367 - Fix a rare crash on Tor servers that have enabled hibernation.
3368 - Fix a seg fault on startup for Tor networks that use only one
3369 directory authority.
3370 - Fix an assert from a race condition that occurs on Tor servers
3371 while exiting, where various threads are trying to log that they're
3372 exiting, and delete the logs, at the same time.
3373 - Make our unit tests pass again on certain obscure platforms.
3376 - Add support for building SUSE RPM packages.
3377 - Speed up initial bootstrapping for clients: if we are making our
3378 first ever connection to any entry guard, then don't mark it down
3380 - When only one Tor server in the network is labelled as a guard,
3381 and we've already picked him, we would cycle endlessly picking him
3382 again, being unhappy about it, etc. Now we specifically exclude
3383 current guards when picking a new guard.
3384 - Servers send create cells more reliably after the TLS connection
3385 is established: we were sometimes forgetting to send half of them
3386 when we had more than one pending.
3387 - If we get a create cell that asks us to extend somewhere, but the
3388 Tor server there doesn't match the expected digest, we now send
3389 a destroy cell back, rather than silently doing nothing.
3390 - Make options->RedirectExit work again.
3391 - Make cookie authentication for the controller work again.
3392 - Stop being picky about unusual characters in the arguments to
3393 mapaddress. It's none of our business.
3394 - Add a new config option "TestVia" that lets you specify preferred
3395 middle hops to use for test circuits. Perhaps this will let me
3396 debug the reachability problems better.
3398 o Log / documentation fixes:
3399 - If we're a server and some peer has a broken TLS certificate, don't
3400 log about it unless ProtocolWarnings is set, i.e., we want to hear
3401 about protocol violations by others.
3402 - Fix spelling of VirtualAddrNetwork in man page.
3403 - Add a better explanation at the top of the autogenerated torrc file
3404 about what happened to our old torrc.
3407 Changes in version 0.1.1.20 - 2006-05-23
3409 - Downgrade a log severity where servers complain that they're
3411 - Avoid a compile warning on FreeBSD.
3412 - Remove string size limit on NEWDESC messages; solve bug 291.
3413 - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
3414 more thoroughly when we're running on windows.
3417 Changes in version 0.1.1.19-rc - 2006-05-03
3419 - Regenerate our local descriptor if it's dirty and we try to use
3420 it locally (e.g. if it changes during reachability detection).
3421 - If we setconf our ORPort to 0, we continued to listen on the
3422 old ORPort and receive connections.
3423 - Avoid a second warning about machine/limits.h on Debian
3425 - Be willing to add our own routerinfo into the routerlist.
3426 Now authorities will include themselves in their directories
3427 and network-statuses.
3428 - Stop trying to upload rendezvous descriptors to every
3429 directory authority: only try the v1 authorities.
3430 - Servers no longer complain when they think they're not
3431 registered with the directory authorities. There were too many
3433 - Backport dist-rpm changes so rpms can be built without errors.
3436 - Implement an option, VirtualAddrMask, to set which addresses
3437 get handed out in response to mapaddress requests. This works
3438 around a bug in tsocks where 127.0.0.0/8 is never socksified.
3441 Changes in version 0.1.1.18-rc - 2006-04-10
3443 - Work harder to download live network-statuses from all the
3444 directory authorities we know about. Improve the threshold
3445 decision logic so we're more robust to edge cases.
3446 - When fetching rendezvous descriptors, we were willing to ask
3447 v2 authorities too, which would always return 404.
3450 - Stop listing down or invalid nodes in the v1 directory. This will
3451 reduce its bulk by about 1/3, and reduce load on directory
3453 - When deciding whether a router is Fast or Guard-worthy, consider
3454 his advertised BandwidthRate and not just the BandwidthCapacity.
3455 - No longer ship INSTALL and README files -- they are useless now.
3456 - Force rpmbuild to behave and honor target_cpu.
3457 - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
3458 - Start to include translated versions of the tor-doc-*.html
3459 files, along with the screenshots. Still needs more work.
3460 - Start sending back 512 and 451 errors if mapaddress fails,
3461 rather than not sending anything back at all.
3462 - When we fail to bind or listen on an incoming or outgoing
3463 socket, we should close it before failing. otherwise we just
3464 leak it. (thanks to weasel for finding.)
3465 - Allow "getinfo dir/status/foo" to work, as long as your DirPort
3466 is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
3467 - Make NoPublish (even though deprecated) work again.
3468 - Fix a minor security flaw where a versioning auth dirserver
3469 could list a recommended version many times in a row to make
3470 clients more convinced that it's recommended.
3471 - Fix crash bug if there are two unregistered servers running
3472 with the same nickname, one of them is down, and you ask for
3473 them by nickname in your EntryNodes or ExitNodes. Also, try
3474 to pick the one that's running rather than an arbitrary one.
3475 - Fix an infinite loop we could hit if we go offline for too long.
3476 - Complain when we hit WSAENOBUFS on recv() or write() too.
3477 Perhaps this will help us hunt the bug.
3478 - If you're not a versioning dirserver, don't put the string
3479 "client-versions \nserver-versions \n" in your network-status.
3480 - Lower the minimum required number of file descriptors to 1000,
3481 so we can have some overhead for Valgrind on Linux, where the
3482 default ulimit -n is 1024.
3485 - Add tor.dizum.com as the fifth authoritative directory server.
3486 - Add a new config option FetchUselessDescriptors, off by default,
3487 for when you plan to run "exitlist" on your client and you want
3488 to know about even the non-running descriptors.
3491 Changes in version 0.1.1.17-rc - 2006-03-28
3493 - Clients and servers since 0.1.1.10-alpha have been expiring
3494 connections whenever they are idle for 5 minutes and they *do*
3495 have circuits on them. Oops. With this new version, clients will
3496 discard their previous entry guard choices and avoid choosing
3497 entry guards running these flawed versions.
3498 - Fix memory leak when uncompressing concatenated zlib streams. This
3499 was causing substantial leaks over time on Tor servers.
3500 - The v1 directory was including servers as much as 48 hours old,
3501 because that's how the new routerlist->routers works. Now only
3502 include them if they're 20 hours old or less.
3505 - Resume building on irix64, netbsd 2.0, etc.
3506 - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
3508 - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
3509 and it is confusing some users.
3510 - Mirrors stop caching the v1 directory so often.
3511 - Make the max number of old descriptors that a cache will hold
3512 rise with the number of directory authorities, so we can scale.
3513 - Change our win32 uname() hack to be more forgiving about what
3514 win32 versions it thinks it's found.
3517 - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
3519 - When the controller's *setconf commands fail, collect an error
3520 message in a string and hand it back to the controller.
3521 - Make the v2 dir's "Fast" flag based on relative capacity, just
3522 like "Stable" is based on median uptime. Name everything in the
3523 top 7/8 Fast, and only the top 1/2 gets to be a Guard.
3524 - Log server fingerprint on startup, so new server operators don't
3525 have to go hunting around their filesystem for it.
3526 - Return a robots.txt on our dirport to discourage google indexing.
3527 - Let the controller ask for GETINFO dir/status/foo so it can ask
3528 directly rather than connecting to the dir port. Only works when
3529 dirport is set for now.
3531 o New config options rather than constants in the code:
3532 - SocksTimeout: How long do we let a socks connection wait
3533 unattached before we fail it?
3534 - CircuitBuildTimeout: Cull non-open circuits that were born
3535 at least this many seconds ago.
3536 - CircuitIdleTimeout: Cull open clean circuits that were born
3537 at least this many seconds ago.
3540 Changes in version 0.1.1.16-rc - 2006-03-18
3541 o Bugfixes on 0.1.1.15-rc:
3542 - Fix assert when the controller asks to attachstream a connect-wait
3543 or resolve-wait stream.
3544 - Now do address rewriting when the controller asks us to attach
3545 to a particular circuit too. This will let Blossom specify
3546 "moria2.exit" without having to learn what moria2's IP address is.
3547 - Make the "tor --verify-config" command-line work again, so people
3548 can automatically check if their torrc will parse.
3549 - Authoritative dirservers no longer require an open connection from
3550 a server to consider him "reachable". We need this change because
3551 when we add new auth dirservers, old servers won't know not to
3553 - Let Tor build on Sun CC again.
3554 - Fix an off-by-one buffer size in dirserv.c that magically never
3555 hit our three authorities but broke sjmurdoch's own tor network.
3556 - If we as a directory mirror don't know of any v1 directory
3557 authorities, then don't try to cache any v1 directories.
3558 - Stop warning about unknown servers in our family when they are
3559 given as hex digests.
3560 - Stop complaining as quickly to the server operator that he
3561 hasn't registered his nickname/key binding.
3562 - Various cleanups so we can add new V2 Auth Dirservers.
3563 - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
3564 reflect the updated flags in our v2 dir protocol.
3565 - Resume allowing non-printable characters for exit streams (both
3566 for connecting and for resolving). Now we tolerate applications
3567 that don't follow the RFCs. But continue to block malformed names
3570 o Bugfixes on 0.1.0.x:
3571 - Fix assert bug in close_logs(): when we close and delete logs,
3572 remove them all from the global "logfiles" list.
3573 - Fix minor integer overflow in calculating when we expect to use up
3574 our bandwidth allocation before hibernating.
3575 - Fix a couple of bugs in OpenSSL detection. Also, deal better when
3576 there are multiple SSLs installed with different versions.
3577 - When we try to be a server and Address is not explicitly set and
3578 our hostname resolves to a private IP address, try to use an
3579 interface address if it has a public address. Now Windows machines
3580 that think of themselves as localhost can work by default.
3583 - Let the controller ask for GETINFO dir/server/foo so it can ask
3584 directly rather than connecting to the dir port.
3585 - Let the controller tell us about certain router descriptors
3586 that it doesn't want Tor to use in circuits. Implement
3587 SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
3588 - New config option SafeSocks to reject all application connections
3589 using unsafe socks protocols. Defaults to off.
3592 Changes in version 0.1.1.15-rc - 2006-03-11
3593 o Bugfixes and cleanups:
3594 - When we're printing strings from the network, don't try to print
3595 non-printable characters. This protects us against shell escape
3596 sequence exploits, and also against attacks to fool humans into
3597 misreading their logs.
3598 - Fix a bug where Tor would fail to establish any connections if you
3599 left it off for 24 hours and then started it: we were happy with
3600 the obsolete network statuses, but they all referred to router
3601 descriptors that were too old to fetch, so we ended up with no
3602 valid router descriptors.
3603 - Fix a seg fault in the controller's "getinfo orconn-status"
3604 command while listing status on incoming handshaking connections.
3605 Introduce a status name "NEW" for these connections.
3606 - If we get a linelist or linelist_s config option from the torrc
3607 (e.g. ExitPolicy) and it has no value, warn and skip rather than
3608 silently resetting it to its default.
3609 - Don't abandon entry guards until they've been down or gone for
3611 - Cleaner and quieter log messages.
3614 - New controller signal NEWNYM that makes new application requests
3616 - Add a new circuit purpose 'controller' to let the controller ask
3617 for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
3618 controller command to let you specify the purpose if you're
3619 starting a new circuit. Add a new SETCIRCUITPURPOSE controller
3620 command to let you change a circuit's purpose after it's been
3622 - Accept "private:*" in routerdesc exit policies; not generated yet
3623 because older Tors do not understand it.
3624 - Add BSD-style contributed startup script "rc.subr" from Peter
3628 Changes in version 0.1.1.14-alpha - 2006-02-20
3629 o Bugfixes on 0.1.1.x:
3630 - Don't die if we ask for a stdout or stderr log (even implicitly)
3631 and we're set to RunAsDaemon -- just warn.
3632 - We still had a few bugs in the OR connection rotation code that
3633 caused directory servers to slowly aggregate connections to other
3634 fast Tor servers. This time for sure!
3635 - Make log entries on Win32 include the name of the function again.
3636 - We were treating a pair of exit policies if they were equal even
3637 if one said accept and the other said reject -- causing us to
3638 not always publish a new descriptor since we thought nothing
3640 - Retry pending server downloads as well as pending networkstatus
3641 downloads when we unexpectedly get a socks request.
3642 - We were ignoring the IS_FAST flag in the directory status,
3643 meaning we were willing to pick trivial-bandwidth nodes for "fast"
3645 - If the controller's SAVECONF command fails (e.g. due to file
3646 permissions), let the controller know that it failed.
3649 - If we're trying to be a Tor server and running Windows 95/98/ME
3650 as a server, explain that we'll likely crash.
3651 - When we're a server, a client asks for an old-style directory,
3652 and our write bucket is empty, don't give it to him. This way
3653 small servers can continue to serve the directory *sometimes*,
3654 without getting overloaded.
3655 - Compress exit policies even more -- look for duplicate lines
3657 - Clients now honor the "guard" flag in the router status when
3658 picking entry guards, rather than looking at is_fast or is_stable.
3659 - Retain unrecognized lines in $DATADIR/state file, so that we can
3660 be forward-compatible.
3661 - Generate 18.0.0.0/8 address policy format in descs when we can;
3662 warn when the mask is not reducible to a bit-prefix.
3663 - Let the user set ControlListenAddress in the torrc. This can be
3664 dangerous, but there are some cases (like a secured LAN) where it
3666 - Split ReachableAddresses into ReachableDirAddresses and
3667 ReachableORAddresses, so we can restrict Dir conns to port 80
3668 and OR conns to port 443.
3669 - Now we can target arch and OS in rpm builds (contributed by
3670 Phobos). Also make the resulting dist-rpm filename match the
3672 - New config options to help controllers: FetchServerDescriptors
3673 and FetchHidServDescriptors for whether to fetch server
3674 info and hidserv info or let the controller do it, and
3675 PublishServerDescriptor and PublishHidServDescriptors.
3676 - Also let the controller set the __AllDirActionsPrivate config
3677 option if you want all directory fetches/publishes to happen via
3678 Tor (it assumes your controller bootstraps your circuits).
3681 Changes in version 0.1.0.17 - 2006-02-17
3682 o Crash bugfixes on 0.1.0.x:
3683 - When servers with a non-zero DirPort came out of hibernation,
3684 sometimes they would trigger an assert.
3686 o Other important bugfixes:
3687 - On platforms that don't have getrlimit (like Windows), we were
3688 artificially constraining ourselves to a max of 1024
3689 connections. Now just assume that we can handle as many as 15000
3690 connections. Hopefully this won't cause other problems.
3692 o Backported features:
3693 - When we're a server, a client asks for an old-style directory,
3694 and our write bucket is empty, don't give it to him. This way
3695 small servers can continue to serve the directory *sometimes*,
3696 without getting overloaded.
3697 - Whenever you get a 503 in response to a directory fetch, try
3698 once more. This will become important once servers start sending
3699 503's whenever they feel busy.
3700 - Fetch a new directory every 120 minutes, not every 40 minutes.
3701 Now that we have hundreds of thousands of users running the old
3702 directory algorithm, it's starting to hurt a lot.
3703 - Bump up the period for forcing a hidden service descriptor upload
3704 from 20 minutes to 1 hour.
3707 Changes in version 0.1.1.13-alpha - 2006-02-09
3708 o Crashes in 0.1.1.x:
3709 - When you tried to setconf ORPort via the controller, Tor would
3710 crash. So people using TorCP to become a server were sad.
3711 - Solve (I hope) the stack-smashing bug that we were seeing on fast
3712 servers. The problem appears to be something do with OpenSSL's
3713 random number generation, or how we call it, or something. Let me
3714 know if the crashes continue.
3715 - Turn crypto hardware acceleration off by default, until we find
3716 somebody smart who can test it for us. (It appears to produce
3717 seg faults in at least some cases.)
3718 - Fix a rare assert error when we've tried all intro points for
3719 a hidden service and we try fetching the service descriptor again:
3720 "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
3723 - Fix a major load balance bug: we were round-robining in 16 KB
3724 chunks, and servers with bandwidthrate of 20 KB, while downloading
3725 a 600 KB directory, would starve their other connections. Now we
3726 try to be a bit more fair.
3727 - Dir authorities and mirrors were never expiring the newest
3728 descriptor for each server, causing memory and directory bloat.
3729 - Fix memory-bloating and connection-bloating bug on servers: We
3730 were never closing any connection that had ever had a circuit on
3731 it, because we were checking conn->n_circuits == 0, yet we had a
3732 bug that let it go negative.
3733 - Make Tor work using squid as your http proxy again -- squid
3734 returns an error if you ask for a URL that's too long, and it uses
3735 a really generic error message. Plus, many people are behind a
3736 transparent squid so they don't even realize it.
3737 - On platforms that don't have getrlimit (like Windows), we were
3738 artificially constraining ourselves to a max of 1024
3739 connections. Now just assume that we can handle as many as 15000
3740 connections. Hopefully this won't cause other problems.
3741 - Add a new config option ExitPolicyRejectPrivate which defaults to
3742 1. This means all exit policies will begin with rejecting private
3743 addresses, unless the server operator explicitly turns it off.
3746 - Clients no longer download descriptors for non-running
3748 - Before we add new directory authorities, we should make it
3749 clear that only v1 authorities should receive/publish hidden
3750 service descriptors.
3753 - As soon as we've fetched some more directory info, immediately
3754 try to download more server descriptors. This way we don't have
3755 a 10 second pause during initial bootstrapping.
3756 - Remove even more loud log messages that the server operator can't
3758 - When we're running an obsolete or un-recommended version, make
3759 the log message more clear about what the problem is and what
3760 versions *are* still recommended.
3761 - Provide a more useful warn message when our onion queue gets full:
3762 the CPU is too slow or the exit policy is too liberal.
3763 - Don't warn when we receive a 503 from a dirserver/cache -- this
3764 will pave the way for them being able to refuse if they're busy.
3765 - When we fail to bind a listener, try to provide a more useful
3766 log message: e.g., "Is Tor already running?"
3767 - Adjust tor-spec to parameterize cell and key lengths. Now Ian
3768 Goldberg can prove things about our handshake protocol more
3770 - MaxConn has been obsolete for a while now. Document the ConnLimit
3771 config option, which is a *minimum* number of file descriptors
3772 that must be available else Tor refuses to start.
3773 - Apply Matt Ghali's --with-syslog-facility patch to ./configure
3774 if you log to syslog and want something other than LOG_DAEMON.
3775 - Make dirservers generate a separate "guard" flag to mean,
3776 "would make a good entry guard". Make clients parse it and vote
3777 on it. Not used by clients yet.
3778 - Implement --with-libevent-dir option to ./configure. Also, improve
3779 search techniques to find libevent, and use those for openssl too.
3780 - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
3781 - Only start testing reachability once we've established a
3782 circuit. This will make startup on dirservers less noisy.
3783 - Don't try to upload hidden service descriptors until we have
3784 established a circuit.
3785 - Fix the controller's "attachstream 0" command to treat conn like
3786 it just connected, doing address remapping, handling .exit and
3787 .onion idioms, and so on. Now we're more uniform in making sure
3788 that the controller hears about new and closing connections.
3791 Changes in version 0.1.1.12-alpha - 2006-01-11
3792 o Bugfixes on 0.1.1.x:
3793 - The fix to close duplicate server connections was closing all
3794 Tor client connections if they didn't establish a circuit
3795 quickly enough. Oops.
3796 - Fix minor memory issue (double-free) that happened on exit.
3798 o Bugfixes on 0.1.0.x:
3799 - Tor didn't warn when it failed to open a log file.
3802 Changes in version 0.1.1.11-alpha - 2006-01-10
3803 o Crashes in 0.1.1.x:
3804 - Include all the assert/crash fixes from 0.1.0.16.
3805 - If you start Tor and then quit very quickly, there were some
3806 races that tried to free things that weren't allocated yet.
3807 - Fix a rare memory stomp if you're running hidden services.
3808 - Fix segfault when specifying DirServer in config without nickname.
3809 - Fix a seg fault when you finish connecting to a server but at
3810 that moment you dump his server descriptor.
3811 - Extendcircuit and Attachstream controller commands would
3812 assert/crash if you don't give them enough arguments.
3813 - Fix an assert error when we're out of space in the connection_list
3814 and we try to post a hidden service descriptor (reported by weasel).
3815 - If you specify a relative torrc path and you set RunAsDaemon in
3816 your torrc, then it chdir()'s to the new directory. If you HUP,
3817 it tries to load the new torrc location, fails, and exits.
3818 The fix: no longer allow a relative path to torrc using -f.
3821 - Implement "entry guards": automatically choose a handful of entry
3822 nodes and stick with them for all circuits. Only pick new guards
3823 when the ones you have are unsuitable, and if the old guards
3824 become suitable again, switch back. This will increase security
3825 dramatically against certain end-point attacks. The EntryNodes
3826 config option now provides some hints about which entry guards you
3827 want to use most; and StrictEntryNodes means to only use those.
3828 - New directory logic: download by descriptor digest, not by
3829 fingerprint. Caches try to download all listed digests from
3830 authorities; clients try to download "best" digests from caches.
3831 This avoids partitioning and isolating attacks better.
3832 - Make the "stable" router flag in network-status be the median of
3833 the uptimes of running valid servers, and make clients pay
3834 attention to the network-status flags. Thus the cutoff adapts
3835 to the stability of the network as a whole, making IRC, IM, etc
3836 connections more reliable.
3839 - Tor servers with dynamic IP addresses were needing to wait 18
3840 hours before they could start doing reachability testing using
3841 the new IP address and ports. This is because they were using
3842 the internal descriptor to learn what to test, yet they were only
3843 rebuilding the descriptor once they decided they were reachable.
3844 - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
3845 to download certain server descriptors, throw them away, and then
3846 fetch them again after 30 minutes. Now mirrors throw away these
3847 server descriptors so clients can't get them.
3848 - We were leaving duplicate connections to other ORs open for a week,
3849 rather than closing them once we detect a duplicate. This only
3850 really affected authdirservers, but it affected them a lot.
3851 - Spread the authdirservers' reachability testing over the entire
3852 testing interval, so we don't try to do 500 TLS's at once every
3856 - If the network is down, and we try to connect to a conn because
3857 we have a circuit in mind, and we timeout (30 seconds) because the
3858 network never answers, we were expiring the circuit, but we weren't
3859 obsoleting the connection or telling the entry_guards functions.
3860 - Some Tor servers process billions of cells per day. These statistics
3861 need to be uint64_t's.
3862 - Check for integer overflows in more places, when adding elements
3863 to smartlists. This could possibly prevent a buffer overflow
3864 on malicious huge inputs. I don't see any, but I haven't looked
3866 - ReachableAddresses kept growing new "reject *:*" lines on every
3868 - When you "setconf log" via the controller, it should remove all
3869 logs. We were automatically adding back in a "log notice stdout".
3870 - Newly bootstrapped Tor networks couldn't establish hidden service
3871 circuits until they had nodes with high uptime. Be more tolerant.
3872 - We were marking servers down when they could not answer every piece
3873 of the directory request we sent them. This was far too harsh.
3874 - Fix the torify (tsocks) config file to not use Tor for localhost
3876 - Directory authorities now go to the proper authority when asking for
3877 a networkstatus, even when they want a compressed one.
3878 - Fix a harmless bug that was causing Tor servers to log
3879 "Got an end because of misc error, but we're not an AP. Closing."
3880 - Authorities were treating their own descriptor changes as cosmetic,
3881 meaning the descriptor available in the network-status and the
3882 descriptor that clients downloaded were different.
3883 - The OS X installer was adding a symlink for tor_resolve but
3884 the binary was called tor-resolve (reported by Thomas Hardly).
3885 - Workaround a problem with some http proxies where they refuse GET
3886 requests that specify "Content-Length: 0" (reported by Adrian).
3887 - Fix wrong log message when you add a "HiddenServiceNodes" config
3888 line without any HiddenServiceDir line (reported by Chris Thomas).
3891 - Write the TorVersion into the state file so we have a prayer of
3892 keeping forward and backward compatibility.
3893 - Revive the FascistFirewall config option rather than eliminating it:
3894 now it's a synonym for ReachableAddresses *:80,*:443.
3895 - Clients choose directory servers from the network status lists,
3896 not from their internal list of router descriptors. Now they can
3897 go to caches directly rather than needing to go to authorities
3899 - Directory authorities ignore router descriptors that have only
3900 cosmetic differences: do this for 0.1.0.x servers now too.
3901 - Add a new flag to network-status indicating whether the server
3902 can answer v2 directory requests too.
3903 - Authdirs now stop whining so loudly about bad descriptors that
3904 they fetch from other dirservers. So when there's a log complaint,
3905 it's for sure from a freshly uploaded descriptor.
3906 - Reduce memory requirements in our structs by changing the order
3908 - There used to be two ways to specify your listening ports in a
3909 server descriptor: on the "router" line and with a separate "ports"
3910 line. Remove support for the "ports" line.
3911 - New config option "AuthDirRejectUnlisted" for auth dirservers as
3912 a panic button: if we get flooded with unusable servers we can
3913 revert to only listing servers in the approved-routers file.
3914 - Auth dir servers can now mark a fingerprint as "!reject" or
3915 "!invalid" in the approved-routers file (as its nickname), to
3916 refuse descriptors outright or include them but marked as invalid.
3917 - Servers store bandwidth history across restarts/crashes.
3918 - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
3919 get a better idea of why their circuits failed. Not used yet.
3920 - Directory mirrors now cache up to 16 unrecognized network-status
3921 docs. Now we can add new authdirservers and they'll be cached too.
3922 - When picking a random directory, prefer non-authorities if any
3924 - New controller option "getinfo desc/all-recent" to fetch the
3925 latest server descriptor for every router that Tor knows about.
3928 Changes in version 0.1.0.16 - 2006-01-02
3929 o Crash bugfixes on 0.1.0.x:
3930 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
3931 corrupting the heap, losing FDs, or crashing when we need to resize
3932 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
3933 - It turns out sparc64 platforms crash on unaligned memory access
3934 too -- so detect and avoid this.
3935 - Handle truncated compressed data correctly (by detecting it and
3937 - Fix possible-but-unlikely free(NULL) in control.c.
3938 - When we were closing connections, there was a rare case that
3939 stomped on memory, triggering seg faults and asserts.
3940 - Avoid potential infinite recursion when building a descriptor. (We
3941 don't know that it ever happened, but better to fix it anyway.)
3942 - We were neglecting to unlink marked circuits from soon-to-close OR
3943 connections, which caused some rare scribbling on freed memory.
3944 - Fix a memory stomping race bug when closing the joining point of two
3945 rendezvous circuits.
3946 - Fix an assert in time parsing found by Steven Murdoch.
3948 o Other bugfixes on 0.1.0.x:
3949 - When we're doing reachability testing, provide more useful log
3950 messages so the operator knows what to expect.
3951 - Do not check whether DirPort is reachable when we are suppressing
3952 advertising it because of hibernation.
3953 - When building with -static or on Solaris, we sometimes needed -ldl.
3954 - When we're deciding whether a stream has enough circuits around
3955 that can handle it, count the freshly dirty ones and not the ones
3956 that are so dirty they won't be able to handle it.
3957 - When we're expiring old circuits, we had a logic error that caused
3958 us to close new rendezvous circuits rather than old ones.
3959 - Give a more helpful log message when you try to change ORPort via
3960 the controller: you should upgrade Tor if you want that to work.
3961 - We were failing to parse Tor versions that start with "Tor ".
3962 - Tolerate faulty streams better: when a stream fails for reason
3963 exitpolicy, stop assuming that the router is lying about his exit
3964 policy. When a stream fails for reason misc, allow it to retry just
3965 as if it was resolvefailed. When a stream has failed three times,
3966 reset its failure count so we can try again and get all three tries.
3969 Changes in version 0.1.1.10-alpha - 2005-12-11
3970 o Correctness bugfixes on 0.1.0.x:
3971 - On Windows, build with a libevent patch from "I-M Weasel" to avoid
3972 corrupting the heap, losing FDs, or crashing when we need to resize
3973 the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
3974 - Stop doing the complex voodoo overkill checking for insecure
3975 Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
3976 - When we were closing connections, there was a rare case that
3977 stomped on memory, triggering seg faults and asserts.
3978 - We were neglecting to unlink marked circuits from soon-to-close OR
3979 connections, which caused some rare scribbling on freed memory.
3980 - When we're deciding whether a stream has enough circuits around
3981 that can handle it, count the freshly dirty ones and not the ones
3982 that are so dirty they won't be able to handle it.
3983 - Recover better from TCP connections to Tor servers that are
3984 broken but don't tell you (it happens!); and rotate TLS
3985 connections once a week.
3986 - When we're expiring old circuits, we had a logic error that caused
3987 us to close new rendezvous circuits rather than old ones.
3988 - Fix a scary-looking but apparently harmless bug where circuits
3989 would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
3990 servers, and never switch to state CIRCUIT_STATE_OPEN.
3991 - When building with -static or on Solaris, we sometimes needed to
3993 - Give a useful message when people run Tor as the wrong user,
3994 rather than telling them to start chowning random directories.
3995 - We were failing to inform the controller about new .onion streams.
3997 o Security bugfixes on 0.1.0.x:
3998 - Refuse server descriptors if the fingerprint line doesn't match
3999 the included identity key. Tor doesn't care, but other apps (and
4000 humans) might actually be trusting the fingerprint line.
4001 - We used to kill the circuit when we receive a relay command we
4002 don't recognize. Now we just drop it.
4003 - Start obeying our firewall options more rigorously:
4004 . If we can't get to a dirserver directly, try going via Tor.
4005 . Don't ever try to connect (as a client) to a place our
4006 firewall options forbid.
4007 . If we specify a proxy and also firewall options, obey the
4008 firewall options even when we're using the proxy: some proxies
4009 can only proxy to certain destinations.
4010 - Fix a bug found by Lasse Overlier: when we were making internal
4011 circuits (intended to be cannibalized later for rendezvous and
4012 introduction circuits), we were picking them so that they had
4013 useful exit nodes. There was no need for this, and it actually
4014 aids some statistical attacks.
4015 - Start treating internal circuits and exit circuits separately.
4016 It's important to keep them separate because internal circuits
4017 have their last hops picked like middle hops, rather than like
4018 exit hops. So exiting on them will break the user's expectations.
4020 o Bugfixes on 0.1.1.x:
4021 - Take out the mis-feature where we tried to detect IP address
4022 flapping for people with DynDNS, and chose not to upload a new
4023 server descriptor sometimes.
4024 - Try to be compatible with OpenSSL 0.9.6 again.
4025 - Log fix: when the controller is logging about .onion addresses,
4026 sometimes it didn't include the ".onion" part of the address.
4027 - Don't try to modify options->DirServers internally -- if the
4028 user didn't specify any, just add the default ones directly to
4029 the trusted dirserver list. This fixes a bug where people running
4030 controllers would use SETCONF on some totally unrelated config
4031 option, and Tor would start yelling at them about changing their
4033 - Let the controller's redirectstream command specify a port, in
4034 case the controller wants to change that too.
4035 - When we requested a pile of server descriptors, we sometimes
4036 accidentally launched a duplicate request for the first one.
4037 - Bugfix for trackhostexits: write down the fingerprint of the
4038 chosen exit, not its nickname, because the chosen exit might not
4040 - When parsing foo.exit, if foo is unknown, and we are leaving
4041 circuits unattached, set the chosen_exit field and leave the
4042 address empty. This matters because controllers got confused
4044 - Directory authorities no longer try to download server
4045 descriptors that they know they will reject.
4047 o Features and updates:
4048 - Replace balanced trees with hash tables: this should make stuff
4049 significantly faster.
4050 - Resume using the AES counter-mode implementation that we ship,
4051 rather than OpenSSL's. Ours is significantly faster.
4052 - Many other CPU and memory improvements.
4053 - Add a new config option FastFirstHopPK (on by default) so clients
4054 do a trivial crypto handshake for their first hop, since TLS has
4055 already taken care of confidentiality and authentication.
4056 - Add a new config option TestSocks so people can see if their
4057 applications are using socks4, socks4a, socks5-with-ip, or
4058 socks5-with-hostname. This way they don't have to keep mucking
4059 with tcpdump and wondering if something got cached somewhere.
4060 - Warn when listening on a public address for socks. I suspect a
4061 lot of people are setting themselves up as open socks proxies,
4062 and they have no idea that jerks on the Internet are using them,
4063 since they simply proxy the traffic into the Tor network.
4064 - Add "private:*" as an alias in configuration for policies. Now
4065 you can simplify your exit policy rather than needing to list
4066 every single internal or nonroutable network space.
4067 - Add a new controller event type that allows controllers to get
4068 all server descriptors that were uploaded to a router in its role
4069 as authoritative dirserver.
4070 - Start shipping socks-extensions.txt, tor-doc-unix.html,
4071 tor-doc-server.html, and stylesheet.css in the tarball.
4072 - Stop shipping tor-doc.html in the tarball.
4075 Changes in version 0.1.1.9-alpha - 2005-11-15
4076 o Usability improvements:
4077 - Start calling it FooListenAddress rather than FooBindAddress,
4078 since few of our users know what it means to bind an address
4080 - Reduce clutter in server logs. We're going to try to make
4081 them actually usable now. New config option ProtocolWarnings that
4082 lets you hear about how _other Tors_ are breaking the protocol. Off
4084 - Divide log messages into logging domains. Once we put some sort
4085 of interface on this, it will let people looking at more verbose
4086 log levels specify the topics they want to hear more about.
4087 - Make directory servers return better http 404 error messages
4088 instead of a generic "Servers unavailable".
4089 - Check for even more Windows version flags when writing the platform
4090 string in server descriptors, and note any we don't recognize.
4091 - Clean up more of the OpenSSL memory when exiting, so we can detect
4092 memory leaks better.
4093 - Make directory authorities be non-versioning, non-naming by
4094 default. Now we can add new directory servers without requiring
4095 their operators to pay close attention.
4096 - When logging via syslog, include the pid whenever we provide
4097 a log entry. Suggested by Todd Fries.
4099 o Performance improvements:
4100 - Directory servers now silently throw away new descriptors that
4101 haven't changed much if the timestamps are similar. We do this to
4102 tolerate older Tor servers that upload a new descriptor every 15
4103 minutes. (It seemed like a good idea at the time.)
4104 - Inline bottleneck smartlist functions; use fast versions by default.
4105 - Add a "Map from digest to void*" abstraction digestmap_t so we
4106 can do less hex encoding/decoding. Use it in router_get_by_digest()
4107 to resolve a performance bottleneck.
4108 - Allow tor_gzip_uncompress to extract as much as possible from
4109 truncated compressed data. Try to extract as many
4110 descriptors as possible from truncated http responses (when
4111 DIR_PURPOSE_FETCH_ROUTERDESC).
4112 - Make circ->onionskin a pointer, not a static array. moria2 was using
4113 125000 circuit_t's after it had been up for a few weeks, which
4114 translates to 20+ megs of wasted space.
4115 - The private half of our EDH handshake keys are now chosen out
4116 of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
4118 o Security improvements:
4119 - Start making directory caches retain old routerinfos, so soon
4120 clients can start asking by digest of descriptor rather than by
4121 fingerprint of server.
4122 - Add half our entropy from RAND_poll in OpenSSL. This knows how
4123 to use egd (if present), openbsd weirdness (if present), vms/os2
4124 weirdness (if we ever port there), and more in the future.
4126 o Bugfixes on 0.1.0.x:
4127 - Do round-robin writes of at most 16 kB per write. This might be
4128 more fair on loaded Tor servers, and it might resolve our Windows
4129 crash bug. It might also slow things down.
4130 - Our TLS handshakes were generating a single public/private
4131 keypair for the TLS context, rather than making a new one for
4132 each new connections. Oops. (But we were still rotating them
4133 periodically, so it's not so bad.)
4134 - When we were cannibalizing a circuit with a particular exit
4135 node in mind, we weren't checking to see if that exit node was
4136 already present earlier in the circuit. Oops.
4137 - When a Tor server's IP changes (e.g. from a dyndns address),
4138 upload a new descriptor so clients will learn too.
4139 - Really busy servers were keeping enough circuits open on stable
4140 connections that they were wrapping around the circuit_id
4141 space. (It's only two bytes.) This exposed a bug where we would
4142 feel free to reuse a circuit_id even if it still exists but has
4143 been marked for close. Try to fix this bug. Some bug remains.
4144 - If we would close a stream early (e.g. it asks for a .exit that
4145 we know would refuse it) but the LeaveStreamsUnattached config
4146 option is set by the controller, then don't close it.
4148 o Bugfixes on 0.1.1.8-alpha:
4149 - Fix a big pile of memory leaks, some of them serious.
4150 - Do not try to download a routerdesc if we would immediately reject
4152 - Resume inserting a newline between all router descriptors when
4153 generating (old style) signed directories, since our spec says
4155 - When providing content-type application/octet-stream for
4156 server descriptors using .z, we were leaving out the
4157 content-encoding header. Oops. (Everything tolerated this just
4158 fine, but that doesn't mean we need to be part of the problem.)
4159 - Fix a potential seg fault in getconf and getinfo using version 1
4160 of the controller protocol.
4161 - Avoid crash: do not check whether DirPort is reachable when we
4162 are suppressing it because of hibernation.
4163 - Make --hash-password not crash on exit.
4166 Changes in version 0.1.1.8-alpha - 2005-10-07
4167 o New features (major):
4168 - Clients don't download or use the directory anymore. Now they
4169 download and use network-statuses from the trusted dirservers,
4170 and fetch individual server descriptors as needed from mirrors.
4171 See dir-spec.txt for all the gory details.
4172 - Be more conservative about whether to advertise our DirPort.
4173 The main change is to not advertise if we're running at capacity
4174 and either a) we could hibernate or b) our capacity is low and
4175 we're using a default DirPort.
4176 - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
4178 o New features (minor):
4179 - Try to be smart about when to retry network-status and
4180 server-descriptor fetches. Still needs some tuning.
4181 - Stop parsing, storing, or using running-routers output (but
4182 mirrors still cache and serve it).
4183 - Consider a threshold of versioning dirservers (dirservers who have
4184 an opinion about which Tor versions are still recommended) before
4185 deciding whether to warn the user that he's obsolete.
4186 - Dirservers can now reject/invalidate by key and IP, with the
4187 config options "AuthDirInvalid" and "AuthDirReject". This is
4188 useful since currently we automatically list servers as running
4189 and usable even if we know they're jerks.
4190 - Provide dire warnings to any users who set DirServer; move it out
4191 of torrc.sample and into torrc.complete.
4192 - Add MyFamily to torrc.sample in the server section.
4193 - Add nicknames to the DirServer line, so we can refer to them
4194 without requiring all our users to memorize their IP addresses.
4195 - When we get an EOF or a timeout on a directory connection, note
4196 how many bytes of serverdesc we are dropping. This will help
4197 us determine whether it is smart to parse incomplete serverdesc
4199 - Add a new function to "change pseudonyms" -- that is, to stop
4200 using any currently-dirty circuits for new streams, so we don't
4201 link new actions to old actions. Currently it's only called on
4202 HUP (or SIGNAL RELOAD).
4203 - On sighup, if UseHelperNodes changed to 1, use new circuits.
4204 - Start using RAND_bytes rather than RAND_pseudo_bytes from
4205 OpenSSL. Also, reseed our entropy every hour, not just at
4206 startup. And entropy in 512-bit chunks, not 160-bit chunks.
4208 o Fixes on 0.1.1.7-alpha:
4209 - Nobody ever implemented EVENT_ADDRMAP for control protocol
4210 version 0, so don't let version 0 controllers ask for it.
4211 - If you requested something with too many newlines via the
4212 v1 controller protocol, you could crash tor.
4213 - Fix a number of memory leaks, including some pretty serious ones.
4214 - Re-enable DirPort testing again, so Tor servers will be willing
4215 to advertise their DirPort if it's reachable.
4216 - On TLS handshake, only check the other router's nickname against
4217 its expected nickname if is_named is set.
4219 o Fixes forward-ported from 0.1.0.15:
4220 - Don't crash when we don't have any spare file descriptors and we
4221 try to spawn a dns or cpu worker.
4222 - Make the numbers in read-history and write-history into uint64s,
4223 so they don't overflow and publish negatives in the descriptor.
4226 - For the OS X package's modified privoxy config file, comment
4227 out the "logfile" line so we don't log everything passed
4229 - We were whining about using socks4 or socks5-with-local-lookup
4230 even when it's an IP in the "virtual" range we designed exactly
4232 - We were leaking some memory every time the client changes IPs.
4233 - Never call free() on tor_malloc()d memory. This will help us
4234 use dmalloc to detect memory leaks.
4235 - Check for named servers when looking them up by nickname;
4236 warn when we'recalling a non-named server by its nickname;
4237 don't warn twice about the same name.
4238 - Try to list MyFamily elements by key, not by nickname, and warn
4239 if we've not heard of the server.
4240 - Make windows platform detection (uname equivalent) smarter.
4241 - It turns out sparc64 doesn't like unaligned access either.
4244 Changes in version 0.1.0.15 - 2005-09-23
4245 o Bugfixes on 0.1.0.x:
4246 - Reject ports 465 and 587 (spam targets) in default exit policy.
4247 - Don't crash when we don't have any spare file descriptors and we
4248 try to spawn a dns or cpu worker.
4249 - Get rid of IgnoreVersion undocumented config option, and make us
4250 only warn, never exit, when we're running an obsolete version.
4251 - Don't try to print a null string when your server finds itself to
4252 be unreachable and the Address config option is empty.
4253 - Make the numbers in read-history and write-history into uint64s,
4254 so they don't overflow and publish negatives in the descriptor.
4255 - Fix a minor memory leak in smartlist_string_remove().
4256 - We were only allowing ourselves to upload a server descriptor at
4257 most every 20 minutes, even if it changed earlier than that.
4258 - Clean up log entries that pointed to old URLs.
4261 Changes in version 0.1.1.7-alpha - 2005-09-14
4262 o Fixes on 0.1.1.6-alpha:
4263 - Exit servers were crashing when people asked them to make a
4264 connection to an address not in their exit policy.
4265 - Looking up a non-existent stream for a v1 control connection would
4267 - Fix a seg fault if we ask a dirserver for a descriptor by
4268 fingerprint but he doesn't know about him.
4269 - SETCONF was appending items to linelists, not clearing them.
4270 - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
4271 out and refuse the setconf if it would fail.
4272 - Downgrade the dirserver log messages when whining about
4276 - Add Peter Palfrader's check-tor script to tor/contrib/
4277 It lets you easily check whether a given server (referenced by
4278 nickname) is reachable by you.
4279 - Numerous changes to move towards client-side v2 directories. Not
4283 - If the user gave tor an odd number of command-line arguments,
4284 we were silently ignoring the last one. Now we complain and fail.
4285 [This wins the oldest-bug prize -- this bug has been present since
4286 November 2002, as released in Tor 0.0.0.]
4287 - Do not use unaligned memory access on alpha, mips, or mipsel.
4288 It *works*, but is very slow, so we treat them as if it doesn't.
4289 - Retry directory requests if we fail to get an answer we like
4290 from a given dirserver (we were retrying before, but only if
4291 we fail to connect).
4292 - When writing the RecommendedVersions line, sort them first.
4293 - When the client asked for a rendezvous port that the hidden
4294 service didn't want to provide, we were sending an IP address
4295 back along with the end cell. Fortunately, it was zero. But stop
4297 - Correct "your server is reachable" log entries to indicate that
4298 it was self-testing that told us so.
4301 Changes in version 0.1.1.6-alpha - 2005-09-09
4302 o Fixes on 0.1.1.5-alpha:
4303 - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
4304 - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
4305 - Fix bug with tor_memmem finding a match at the end of the string.
4306 - Make unit tests run without segfaulting.
4307 - Resolve some solaris x86 compile warnings.
4308 - Handle duplicate lines in approved-routers files without warning.
4309 - Fix bug where as soon as a server refused any requests due to his
4310 exit policy (e.g. when we ask for localhost and he tells us that's
4311 127.0.0.1 and he won't do it), we decided he wasn't obeying his
4312 exit policy using him for any exits.
4313 - Only do openssl hardware accelerator stuff if openssl version is
4316 o New controller features/fixes:
4317 - Add a "RESETCONF" command so you can set config options like
4318 AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
4319 a config option in the torrc with no value, then it clears it
4320 entirely (rather than setting it to its default).
4321 - Add a "GETINFO config-file" to tell us where torrc is.
4322 - Avoid sending blank lines when GETINFO replies should be empty.
4323 - Add a QUIT command for the controller (for using it manually).
4324 - Fix a bug in SAVECONF that was adding default dirservers and
4325 other redundant entries to the torrc file.
4327 o Start on the new directory design:
4328 - Generate, publish, cache, serve new network-status format.
4329 - Publish individual descriptors (by fingerprint, by "all", and by
4331 - Publish client and server recommended versions separately.
4332 - Allow tor_gzip_uncompress() to handle multiple concatenated
4333 compressed strings. Serve compressed groups of router
4334 descriptors. The compression logic here could be more
4336 - Distinguish v1 authorities (all currently trusted directories)
4337 from v2 authorities (all trusted directories).
4338 - Change DirServers config line to note which dirs are v1 authorities.
4339 - Add configuration option "V1AuthoritativeDirectory 1" which
4340 moria1, moria2, and tor26 should set.
4341 - Remove option when getting directory cache to see whether they
4342 support running-routers; they all do now. Replace it with one
4343 to see whether caches support v2 stuff.
4346 - Dirservers now do their own external reachability testing of each
4347 Tor server, and only list them as running if they've been found to
4348 be reachable. We also send back warnings to the server's logs if
4349 it uploads a descriptor that we already believe is unreachable.
4350 - Implement exit enclaves: if we know an IP address for the
4351 destination, and there's a running Tor server at that address
4352 which allows exit to the destination, then extend the circuit to
4353 that exit first. This provides end-to-end encryption and end-to-end
4354 authentication. Also, if the user wants a .exit address or enclave,
4355 use 4 hops rather than 3, and cannibalize a general circ for it
4357 - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
4358 controller. Also, rotate dns and cpu workers if the controller
4359 changes options that will affect them; and initialize the dns
4360 worker cache tree whether or not we start out as a server.
4361 - Only upload a new server descriptor when options change, 18
4362 hours have passed, uptime is reset, or bandwidth changes a lot.
4363 - Check [X-]Forwarded-For headers in HTTP requests when generating
4364 log messages. This lets people run dirservers (and caches) behind
4365 Apache but still know which IP addresses are causing warnings.
4367 o Config option changes:
4368 - Replace (Fascist)Firewall* config options with a new
4369 ReachableAddresses option that understands address policies.
4370 For example, "ReachableAddresses *:80,*:443"
4371 - Get rid of IgnoreVersion undocumented config option, and make us
4372 only warn, never exit, when we're running an obsolete version.
4373 - Make MonthlyAccountingStart config option truly obsolete now.
4376 - Reject ports 465 and 587 in the default exit policy, since
4377 people have started using them for spam too.
4378 - It turns out we couldn't bootstrap a network since we added
4379 reachability detection in 0.1.0.1-rc. Good thing the Tor network
4380 has never gone down. Add an AssumeReachable config option to let
4381 servers and dirservers bootstrap. When we're trying to build a
4382 high-uptime or high-bandwidth circuit but there aren't enough
4383 suitable servers, try being less picky rather than simply failing.
4384 - Our logic to decide if the OR we connected to was the right guy
4385 was brittle and maybe open to a mitm for unverified routers.
4386 - We weren't cannibalizing circuits correctly for
4387 CIRCUIT_PURPOSE_C_ESTABLISH_REND and
4388 CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
4389 build those from scratch. This should make hidden services faster.
4390 - Predict required circuits better, with an eye toward making hidden
4391 services faster on the service end.
4392 - Retry streams if the exit node sends back a 'misc' failure. This
4393 should result in fewer random failures. Also, after failing
4394 from resolve failed or misc, reset the num failures, so we give
4395 it a fair shake next time we try.
4396 - Clean up the rendezvous warn log msgs, and downgrade some to info.
4397 - Reduce severity on logs about dns worker spawning and culling.
4398 - When we're shutting down and we do something like try to post a
4399 server descriptor or rendezvous descriptor, don't complain that
4400 we seem to be unreachable. Of course we are, we're shutting down.
4401 - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
4402 We don't use them yet, but maybe one day our DNS resolver will be
4403 able to discover them.
4404 - Make ContactInfo mandatory for authoritative directory servers.
4405 - Require server descriptors to list IPv4 addresses -- hostnames
4406 are no longer allowed. This also fixes some potential security
4407 problems with people providing hostnames as their address and then
4408 preferentially resolving them to partition users.
4409 - Change log line for unreachability to explicitly suggest /etc/hosts
4410 as the culprit. Also make it clearer what IP address and ports we're
4411 testing for reachability.
4412 - Put quotes around user-supplied strings when logging so users are
4413 more likely to realize if they add bad characters (like quotes)
4415 - Let auth dir servers start without specifying an Address config
4417 - Make unit tests (and other invocations that aren't the real Tor)
4418 run without launching listeners, creating subdirectories, and so on.
4421 Changes in version 0.1.1.5-alpha - 2005-08-08
4422 o Bugfixes included in 0.1.0.14.
4424 o Bugfixes on 0.1.0.x:
4425 - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
4426 torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
4427 it would silently using ignore the 6668.
4430 Changes in version 0.1.0.14 - 2005-08-08
4431 o Bugfixes on 0.1.0.x:
4432 - Fix the other half of the bug with crypto handshakes
4434 - Fix an assert trigger if you send a 'signal term' via the
4435 controller when it's listening for 'event info' messages.
4438 Changes in version 0.1.1.4-alpha - 2005-08-04
4439 o Bugfixes included in 0.1.0.13.
4442 - Improve tor_gettimeofday() granularity on windows.
4443 - Make clients regenerate their keys when their IP address changes.
4444 - Implement some more GETINFO goodness: expose helper nodes, config
4445 options, getinfo keys.
4448 Changes in version 0.1.0.13 - 2005-08-04
4449 o Bugfixes on 0.1.0.x:
4450 - Fix a critical bug in the security of our crypto handshakes.
4451 - Fix a size_t underflow in smartlist_join_strings2() that made
4452 it do bad things when you hand it an empty smartlist.
4453 - Fix Windows installer to ship Tor license (thanks to Aphex for
4454 pointing out this oversight) and put a link to the doc directory
4456 - Explicitly set no-unaligned-access for sparc: it turns out the
4457 new gcc's let you compile broken code, but that doesn't make it
4461 Changes in version 0.1.1.3-alpha - 2005-07-23
4462 o Bugfixes on 0.1.1.2-alpha:
4463 - Fix a bug in handling the controller's "post descriptor"
4465 - Fix several bugs in handling the controller's "extend circuit"
4467 - Fix a bug in handling the controller's "stream status" event.
4468 - Fix an assert failure if we have a controller listening for
4469 circuit events and we go offline.
4470 - Re-allow hidden service descriptors to publish 0 intro points.
4471 - Fix a crash when generating your hidden service descriptor if
4472 you don't have enough intro points already.
4474 o New features on 0.1.1.2-alpha:
4475 - New controller function "getinfo accounting", to ask how
4476 many bytes we've used in this time period.
4477 - Experimental support for helper nodes: a lot of the risk from
4478 a small static adversary comes because users pick new random
4479 nodes every time they rebuild a circuit. Now users will try to
4480 stick to the same small set of entry nodes if they can. Not
4481 enabled by default yet.
4483 o Bugfixes on 0.1.0.12:
4484 - If you're an auth dir server, always publish your dirport,
4485 even if you haven't yet found yourself to be reachable.
4486 - Fix a size_t underflow in smartlist_join_strings2() that made
4487 it do bad things when you hand it an empty smartlist.
4490 Changes in version 0.1.0.12 - 2005-07-18
4491 o New directory servers:
4492 - tor26 has changed IP address.
4494 o Bugfixes on 0.1.0.x:
4495 - Fix a possible double-free in tor_gzip_uncompress().
4496 - When --disable-threads is set, do not search for or link against
4498 - Don't trigger an assert if an authoritative directory server
4499 claims its dirport is 0.
4500 - Fix bug with removing Tor as an NT service: some people were
4501 getting "The service did not return an error." Thanks to Matt
4505 Changes in version 0.1.1.2-alpha - 2005-07-15
4506 o New directory servers:
4507 - tor26 has changed IP address.
4509 o Bugfixes on 0.1.0.x, crashes/leaks:
4510 - Port the servers-not-obeying-their-exit-policies fix from
4512 - Fix an fd leak in start_daemon().
4513 - On Windows, you can't always reopen a port right after you've
4514 closed it. So change retry_listeners() to only close and re-open
4515 ports that have changed.
4516 - Fix a possible double-free in tor_gzip_uncompress().
4518 o Bugfixes on 0.1.0.x, usability:
4519 - When tor_socketpair() fails in Windows, give a reasonable
4520 Windows-style errno back.
4521 - Let people type "tor --install" as well as "tor -install" when
4523 want to make it an NT service.
4524 - NT service patch from Matt Edman to improve error messages.
4525 - When the controller asks for a config option with an abbreviated
4526 name, give the full name in our response.
4527 - Correct the man page entry on TrackHostExitsExpire.
4528 - Looks like we were never delivering deflated (i.e. compressed)
4529 running-routers lists, even when asked. Oops.
4530 - When --disable-threads is set, do not search for or link against
4533 o Bugfixes on 0.1.1.x:
4534 - Fix a seg fault with autodetecting which controller version is
4538 - New hidden service descriptor format: put a version in it, and
4539 let people specify introduction/rendezvous points that aren't
4540 in "the directory" (which is subjective anyway).
4541 - Allow the DEBUG controller event to work again. Mark certain log
4542 entries as "don't tell this to controllers", so we avoid cycles.
4545 Changes in version 0.1.0.11 - 2005-06-30
4546 o Bugfixes on 0.1.0.x:
4547 - Fix major security bug: servers were disregarding their
4548 exit policies if clients behaved unexpectedly.
4549 - Make OS X init script check for missing argument, so we don't
4550 confuse users who invoke it incorrectly.
4551 - Fix a seg fault in "tor --hash-password foo".
4552 - The MAPADDRESS control command was broken.
4555 Changes in version 0.1.1.1-alpha - 2005-06-29
4557 - Make OS X init script check for missing argument, so we don't
4558 confuse users who invoke it incorrectly.
4559 - Fix a seg fault in "tor --hash-password foo".
4560 - Fix a possible way to DoS dirservers.
4561 - When we complain that your exit policy implicitly allows local or
4562 private address spaces, name them explicitly so operators can
4564 - Make the log message less scary when all the dirservers are
4565 temporarily unreachable.
4566 - We were printing the number of idle dns workers incorrectly when
4570 - Revised controller protocol (version 1) that uses ascii rather
4571 than binary. Add supporting libraries in python and java so you
4572 can use the controller from your applications without caring how
4574 - Spiffy new support for crypto hardware accelerators. Can somebody
4578 Changes in version 0.0.9.10 - 2005-06-16
4579 o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
4580 - Refuse relay cells that claim to have a length larger than the
4581 maximum allowed. This prevents a potential attack that could read
4582 arbitrary memory (e.g. keys) from an exit server's process
4586 Changes in version 0.1.0.10 - 2005-06-14
4587 o Allow a few EINVALs from libevent before dying. Warn on kqueue with
4588 libevent before 1.1a.
4591 Changes in version 0.1.0.9-rc - 2005-06-09
4593 - Reset buf->highwater every time buf_shrink() is called, not just on
4594 a successful shrink. This was causing significant memory bloat.
4595 - Fix buffer overflow when checking hashed passwords.
4596 - Security fix: if seeding the RNG on Win32 fails, quit.
4597 - Allow seeding the RNG on Win32 even when you're not running as
4599 - Disable threading on Solaris too. Something is wonky with it,
4600 cpuworkers, and reentrant libs.
4601 - Reenable the part of the code that tries to flush as soon as an
4602 OR outbuf has a full TLS record available. Perhaps this will make
4603 OR outbufs not grow as huge except in rare cases, thus saving lots
4604 of CPU time plus memory.
4605 - Reject malformed .onion addresses rather then passing them on as
4606 normal web requests.
4607 - Adapt patch from Adam Langley: fix possible memory leak in
4608 tor_lookup_hostname().
4609 - Initialize libevent later in the startup process, so the logs are
4610 already established by the time we start logging libevent warns.
4611 - Use correct errno on win32 if libevent fails.
4612 - Check and warn about known-bad/slow libevent versions.
4613 - Pay more attention to the ClientOnly config option.
4614 - Have torctl.in/tor.sh.in check for location of su binary (needed
4616 - Correct/add man page entries for LongLivedPorts, ExitPolicy,
4617 KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
4618 HttpProxyAuthenticator
4619 - Stop warning about sigpipes in the logs. We're going to
4620 pretend that getting these occassionally is normal and fine.
4621 - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
4623 installer screens; and don't put stuff into StartupItems unless
4624 the user asks you to.
4625 - Require servers that use the default dirservers to have public IP
4626 addresses. We have too many servers that are configured with private
4627 IPs and their admins never notice the log entries complaining that
4628 their descriptors are being rejected.
4629 - Add OSX uninstall instructions. An actual uninstall script will
4633 Changes in version 0.1.0.8-rc - 2005-05-23
4635 - It turns out that kqueue on OS X 10.3.9 was causing kernel
4636 panics. Disable kqueue on all OS X Tors.
4637 - Fix RPM: remove duplicate line accidentally added to the rpm
4639 - Disable threads on openbsd too, since its gethostaddr is not
4641 - Tolerate libevent 0.8 since it still works, even though it's
4643 - Enable building on Red Hat 9.0 again.
4644 - Allow the middle hop of the testing circuit to be running any
4645 version, now that most of them have the bugfix to let them connect
4646 to unknown servers. This will allow reachability testing to work
4647 even when 0.0.9.7-0.0.9.9 become obsolete.
4648 - Handle relay cells with rh.length too large. This prevents
4649 a potential attack that could read arbitrary memory (maybe even
4650 keys) from the exit server's process.
4651 - We screwed up the dirport reachability testing when we don't yet
4652 have a cached version of the directory. Hopefully now fixed.
4653 - Clean up router_load_single_router() (used by the controller),
4654 so it doesn't seg fault on error.
4655 - Fix a minor memory leak when somebody establishes an introduction
4656 point at your Tor server.
4657 - If a socks connection ends because read fails, don't warn that
4658 you're not sending a socks reply back.
4661 - Add HttpProxyAuthenticator config option too, that works like
4662 the HttpsProxyAuthenticator config option.
4663 - Encode hashed controller passwords in hex instead of base64,
4664 to make it easier to write controllers.
4667 Changes in version 0.1.0.7-rc - 2005-05-17
4669 - Fix a bug in the OS X package installer that prevented it from
4670 installing on Tiger.
4671 - Fix a script bug in the OS X package installer that made it
4672 complain during installation.
4673 - Find libevent even if it's hiding in /usr/local/ and your
4674 CFLAGS and LDFLAGS don't tell you to look there.
4675 - Be able to link with libevent as a shared library (the default
4676 after 1.0d), even if it's hiding in /usr/local/lib and even
4677 if you haven't added /usr/local/lib to your /etc/ld.so.conf,
4678 assuming you're running gcc. Otherwise fail and give a useful
4680 - Fix a bug in the RPM packager: set home directory for _tor to
4681 something more reasonable when first installing.
4682 - Free a minor amount of memory that is still reachable on exit.
4685 Changes in version 0.1.0.6-rc - 2005-05-14
4687 - Implement --disable-threads configure option. Disable threads on
4688 netbsd by default, because it appears to have no reentrant resolver
4690 - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
4691 release (1.1) detects and disables kqueue if it's broken.
4692 - Append default exit policy before checking for implicit internal
4693 addresses. Now we don't log a bunch of complaints on startup
4694 when using the default exit policy.
4695 - Some people were putting "Address " in their torrc, and they had
4696 a buggy resolver that resolved " " to 0.0.0.0. Oops.
4697 - If DataDir is ~/.tor, and that expands to /.tor, then default to
4698 LOCALSTATEDIR/tor instead.
4699 - Fix fragmented-message bug in TorControl.py.
4700 - Resolve a minor bug which would prevent unreachable dirports
4701 from getting suppressed in the published descriptor.
4702 - When the controller gave us a new descriptor, we weren't resolving
4703 it immediately, so Tor would think its address was 0.0.0.0 until
4704 we fetched a new directory.
4705 - Fix an uppercase/lowercase case error in suppressing a bogus
4706 libevent warning on some Linuxes.
4709 - Begin scrubbing sensitive strings from logs by default. Turn off
4710 the config option SafeLogging if you need to do debugging.
4711 - Switch to a new buffer management algorithm, which tries to avoid
4712 reallocing and copying quite as much. In first tests it looks like
4713 it uses *more* memory on average, but less cpu.
4714 - First cut at support for "create-fast" cells. Clients can use
4715 these when extending to their first hop, since the TLS already
4716 provides forward secrecy and authentication. Not enabled on
4718 - When dirservers refuse a router descriptor, we now log its
4719 contactinfo, platform, and the poster's IP address.
4720 - Call tor_free_all instead of connections_free_all after forking, to
4721 save memory on systems that need to fork.
4722 - Whine at you if you're a server and you don't set your contactinfo.
4723 - Implement --verify-config command-line option to check if your torrc
4724 is valid without actually launching Tor.
4725 - Rewrite address "serifos.exit" to "localhost.serifos.exit"
4726 rather than just rejecting it.
4729 Changes in version 0.1.0.5-rc - 2005-04-27
4731 - Stop trying to print a null pointer if an OR conn fails because
4732 we didn't like its cert.
4734 - Switch our internal buffers implementation to use a ring buffer,
4735 to hopefully improve performance for fast servers a lot.
4736 - Add HttpsProxyAuthenticator support (basic auth only), based
4737 on patch from Adam Langley.
4738 - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
4739 the fast servers that have been joining lately.
4740 - Give hidden service accesses extra time on the first attempt,
4741 since 60 seconds is often only barely enough. This might improve
4743 - Improve performance for dirservers: stop re-parsing the whole
4744 directory every time you regenerate it.
4745 - Add more debugging info to help us find the weird dns freebsd
4746 pthreads bug; cleaner debug messages to help track future issues.
4749 Changes in version 0.0.9.9 - 2005-04-23
4750 o Bugfixes on 0.0.9.x:
4751 - If unofficial Tor clients connect and send weird TLS certs, our
4752 Tor server triggers an assert. This release contains a minimal
4753 backport from the broader fix that we put into 0.1.0.4-rc.
4756 Changes in version 0.1.0.4-rc - 2005-04-23
4758 - If unofficial Tor clients connect and send weird TLS certs, our
4759 Tor server triggers an assert. Stop asserting, and start handling
4760 TLS errors better in other situations too.
4761 - When the controller asks us to tell it about all the debug-level
4762 logs, it turns out we were generating debug-level logs while
4763 telling it about them, which turns into a bad loop. Now keep
4764 track of whether you're sending a debug log to the controller,
4765 and don't log when you are.
4766 - Fix the "postdescriptor" feature of the controller interface: on
4767 non-complete success, only say "done" once.
4769 - Clients are now willing to load balance over up to 2mB, not 1mB,
4770 of advertised bandwidth capacity.
4771 - Add a NoPublish config option, so you can be a server (e.g. for
4772 testing running Tor servers in other Tor networks) without
4773 publishing your descriptor to the primary dirservers.
4776 Changes in version 0.1.0.3-rc - 2005-04-08
4777 o Improvements on 0.1.0.2-rc:
4778 - Client now retries when streams end early for 'hibernating' or
4779 'resource limit' reasons, rather than failing them.
4780 - More automated handling for dirserver operators:
4781 - Automatically approve nodes running 0.1.0.2-rc or later,
4782 now that the the reachability detection stuff is working.
4783 - Now we allow two unverified servers with the same nickname
4784 but different keys. But if a nickname is verified, only that
4785 nickname+key are allowed.
4786 - If you're an authdirserver connecting to an address:port,
4787 and it's not the OR you were expecting, forget about that
4788 descriptor. If he *was* the one you were expecting, then forget
4789 about all other descriptors for that address:port.
4790 - Allow servers to publish descriptors from 12 hours in the future.
4791 Corollary: only whine about clock skew from the dirserver if
4792 he's a trusted dirserver (since now even verified servers could
4793 have quite wrong clocks).
4794 - Adjust maximum skew and age for rendezvous descriptors: let skew
4795 be 48 hours rather than 90 minutes.
4796 - Efficiency improvements:
4797 - Keep a big splay tree of (circid,orconn)->circuit mappings to make
4798 it much faster to look up a circuit for each relay cell.
4799 - Remove most calls to assert_all_pending_dns_resolves_ok(),
4800 since they're eating our cpu on exit nodes.
4801 - Stop wasting time doing a case insensitive comparison for every
4802 dns name every time we do any lookup. Canonicalize the names to
4803 lowercase and be done with it.
4804 - Start sending 'truncated' cells back rather than destroy cells,
4805 if the circuit closes in front of you. This means we won't have
4806 to abandon partially built circuits.
4807 - Only warn once per nickname from add_nickname_list_to_smartlist
4808 per failure, so an entrynode or exitnode choice that's down won't
4810 - Put a note in the torrc about abuse potential with the default
4812 - Revise control spec and implementation to allow all log messages to
4813 be sent to controller with their severities intact (suggested by
4814 Matt Edman). Update TorControl to handle new log event types.
4815 - Provide better explanation messages when controller's POSTDESCRIPTOR
4817 - Stop putting nodename in the Platform string in server descriptors.
4818 It doesn't actually help, and it is confusing/upsetting some people.
4820 o Bugfixes on 0.1.0.2-rc:
4821 - We were printing the host mask wrong in exit policies in server
4822 descriptors. This isn't a critical bug though, since we were still
4823 obeying the exit policy internally.
4824 - Fix Tor when compiled with libevent but without pthreads: move
4825 connection_unregister() from _connection_free() to
4827 - Fix an assert trigger (already fixed in 0.0.9.x): when we have
4828 the rare mysterious case of accepting a conn on 0.0.0.0:0, then
4829 when we look through the connection array, we'll find any of the
4830 cpu/dnsworkers. This is no good.
4832 o Bugfixes on 0.0.9.8:
4833 - Fix possible bug on threading platforms (e.g. win32) which was
4834 leaking a file descriptor whenever a cpuworker or dnsworker died.
4835 - When using preferred entry or exit nodes, ignore whether the
4836 circuit wants uptime or capacity. They asked for the nodes, they
4838 - chdir() to your datadirectory at the *end* of the daemonize process,
4839 not the beginning. This was a problem because the first time you
4840 run tor, if your datadir isn't there, and you have runasdaemon set
4841 to 1, it will try to chdir to it before it tries to create it. Oops.
4842 - Handle changed router status correctly when dirserver reloads
4843 fingerprint file. We used to be dropping all unverified descriptors
4844 right then. The bug was hidden because we would immediately
4845 fetch a directory from another dirserver, which would include the
4846 descriptors we just dropped.
4847 - When we're connecting to an OR and he's got a different nickname/key
4848 than we were expecting, only complain loudly if we're an OP or a
4849 dirserver. Complaining loudly to the OR admins just confuses them.
4850 - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
4851 artificially capped at 500kB.
4854 Changes in version 0.0.9.8 - 2005-04-07
4855 o Bugfixes on 0.0.9.x:
4856 - We have a bug that I haven't found yet. Sometimes, very rarely,
4857 cpuworkers get stuck in the 'busy' state, even though the cpuworker
4858 thinks of itself as idle. This meant that no new circuits ever got
4859 established. Here's a workaround to kill any cpuworker that's been
4860 busy for more than 100 seconds.
4863 Changes in version 0.1.0.2-rc - 2005-04-01
4864 o Bugfixes on 0.1.0.1-rc:
4865 - Fixes on reachability detection:
4866 - Don't check for reachability while hibernating.
4867 - If ORPort is reachable but DirPort isn't, still publish the
4868 descriptor, but zero out DirPort until it's found reachable.
4869 - When building testing circs for ORPort testing, use only
4870 high-bandwidth nodes, so fewer circuits fail.
4871 - Complain about unreachable ORPort separately from unreachable
4872 DirPort, so the user knows what's going on.
4873 - Make sure we only conclude ORPort reachability if we didn't
4874 initiate the conn. Otherwise we could falsely conclude that
4875 we're reachable just because we connected to the guy earlier
4876 and he used that same pipe to extend to us.
4877 - Authdirservers shouldn't do ORPort reachability detection,
4878 since they're in clique mode, so it will be rare to find a
4879 server not already connected to them.
4880 - When building testing circuits, always pick middle hops running
4881 Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
4882 bug. (This is a kludge; it will go away when 0.0.9.x becomes
4884 - When we decide we're reachable, actually publish our descriptor
4886 - Fix bug in redirectstream in the controller.
4887 - Fix the state descriptor strings so logs don't claim edge streams
4888 are in a different state than they actually are.
4889 - Use recent libevent features when possible (this only really affects
4890 win32 and osx right now, because the new libevent with these
4891 features hasn't been released yet). Add code to suppress spurious
4893 - Prevent possible segfault in connection_close_unattached_ap().
4894 - Fix newlines on torrc in win32.
4895 - Improve error msgs when tor-resolve fails.
4897 o Improvements on 0.0.9.x:
4898 - New experimental script tor/contrib/ExerciseServer.py (needs more
4899 work) that uses the controller interface to build circuits and
4900 fetch pages over them. This will help us bootstrap servers that
4901 have lots of capacity but haven't noticed it yet.
4902 - New experimental script tor/contrib/PathDemo.py (needs more work)
4903 that uses the controller interface to let you choose whole paths
4905 "<hostname>.<path,separated by dots>.<length of path>.path"
4906 - When we've connected to an OR and handshaked but didn't like
4907 the result, we were closing the conn without sending destroy
4908 cells back for pending circuits. Now send those destroys.
4911 Changes in version 0.0.9.7 - 2005-04-01
4912 o Bugfixes on 0.0.9.x:
4913 - Fix another race crash bug (thanks to Glenn Fink for reporting).
4914 - Compare identity to identity, not to nickname, when extending to
4915 a router not already in the directory. This was preventing us from
4916 extending to unknown routers. Oops.
4917 - Make sure to create OS X Tor user in <500 range, so we aren't
4918 creating actual system users.
4919 - Note where connection-that-hasn't-sent-end was marked, and fix
4920 a few really loud instances of this harmless bug (it's fixed more
4924 Changes in version 0.1.0.1-rc - 2005-03-28
4926 - Add reachability testing. Your Tor server will automatically try
4927 to see if its ORPort and DirPort are reachable from the outside,
4928 and it won't upload its descriptor until it decides they are.
4929 - Handle unavailable hidden services better. Handle slow or busy
4930 hidden services better.
4931 - Add support for CONNECTing through https proxies, with "HttpsProxy"
4933 - New exit policy: accept most low-numbered ports, rather than
4934 rejecting most low-numbered ports.
4935 - More Tor controller support (still experimental). See
4936 http://tor.eff.org/doc/control-spec.txt for all the new features,
4937 including signals to emulate unix signals from any platform;
4938 redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
4939 closestream; closecircuit; etc.
4940 - Make nt services work and start on startup on win32 (based on
4941 patch by Matt Edman).
4942 - Add a new AddressMap config directive to rewrite incoming socks
4943 addresses. This lets you, for example, declare an implicit
4944 required exit node for certain sites.
4945 - Add a new TrackHostExits config directive to trigger addressmaps
4946 for certain incoming socks addresses -- for sites that break when
4947 your exit keeps changing (based on patch by Mike Perry).
4948 - Redo the client-side dns cache so it's just an addressmap too.
4949 - Notice when our IP changes, and reset stats/uptime/reachability.
4950 - When an application is using socks5, give him the whole variety of
4951 potential socks5 responses (connect refused, host unreachable, etc),
4952 rather than just "success" or "failure".
4953 - A more sane version numbering system. See
4954 http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
4955 - New contributed script "exitlist": a simple python script to
4956 parse directories and find Tor nodes that exit to listed
4958 - New contributed script "privoxy-tor-toggle" to toggle whether
4959 Privoxy uses Tor. Seems to be configured for Debian by default.
4960 - Report HTTP reasons to client when getting a response from directory
4961 servers -- so you can actually know what went wrong.
4962 - New config option MaxAdvertisedBandwidth which lets you advertise
4963 a low bandwidthrate (to not attract as many circuits) while still
4964 allowing a higher bandwidthrate in reality.
4966 o Robustness/stability fixes:
4967 - Make Tor use Niels Provos's libevent instead of its current
4968 poll-but-sometimes-select mess. This will let us use faster async
4969 cores (like epoll, kpoll, and /dev/poll), and hopefully work better
4971 - pthread support now too. This was forced because when we forked,
4972 we ended up wasting a lot of duplicate ram over time. Also switch
4973 to foo_r versions of some library calls to allow reentry and
4975 - Better handling for heterogeneous / unreliable nodes:
4976 - Annotate circuits w/ whether they aim to contain high uptime nodes
4977 and/or high capacity nodes. When building circuits, choose
4979 - This means that every single node in an intro rend circuit,
4980 not just the last one, will have a minimum uptime.
4981 - New config option LongLivedPorts to indicate application streams
4982 that will want high uptime circuits.
4983 - Servers reset uptime when a dir fetch entirely fails. This
4984 hopefully reflects stability of the server's network connectivity.
4985 - If somebody starts his tor server in Jan 2004 and then fixes his
4986 clock, don't make his published uptime be a year.
4987 - Reset published uptime when you wake up from hibernation.
4988 - Introduce a notion of 'internal' circs, which are chosen without
4989 regard to the exit policy of the last hop. Intro and rendezvous
4990 circs must be internal circs, to avoid leaking information. Resolve
4991 and connect streams can use internal circs if they want.
4992 - New circuit pooling algorithm: make sure to have enough circs around
4993 to satisfy any predicted ports, and also make sure to have 2 internal
4994 circs around if we've required internal circs lately (and with high
4995 uptime if we've seen that lately too).
4996 - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
4997 which describes how often we retry making new circuits if current
4998 ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
4999 how long we're willing to make use of an already-dirty circuit.
5000 - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
5001 circ as necessary, if there are any completed ones lying around
5002 when we try to launch one.
5003 - Make hidden services try to establish a rendezvous for 30 seconds,
5004 rather than for n (where n=3) attempts to build a circuit.
5005 - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
5006 "ShutdownWaitLength".
5007 - Try to be more zealous about calling connection_edge_end when
5008 things go bad with edge conns in connection.c.
5009 - Revise tor-spec to add more/better stream end reasons.
5010 - Revise all calls to connection_edge_end to avoid sending "misc",
5011 and to take errno into account where possible.
5014 - Fix a race condition that can trigger an assert, when we have a
5015 pending create cell and an OR connection fails right then.
5016 - Fix several double-mark-for-close bugs, e.g. where we were finding
5017 a conn for a cell even if that conn is already marked for close.
5018 - Make sequence of log messages when starting on win32 with no config
5019 file more reasonable.
5020 - When choosing an exit node for a new non-internal circ, don't take
5021 into account whether it'll be useful for any pending x.onion
5022 addresses -- it won't.
5023 - Turn addr_policy_compare from a tristate to a quadstate; this should
5024 help address our "Ah, you allow 1.2.3.4:80. You are a good choice
5025 for google.com" problem.
5026 - Make "platform" string in descriptor more accurate for Win32 servers,
5027 so it's not just "unknown platform".
5028 - Fix an edge case in parsing config options (thanks weasel).
5029 If they say "--" on the commandline, it's not an option.
5030 - Reject odd-looking addresses at the client (e.g. addresses that
5031 contain a colon), rather than having the server drop them because
5033 - tor-resolve requests were ignoring .exit if there was a working circuit
5034 they could use instead.
5035 - REUSEADDR on normal platforms means you can rebind to the port
5036 right after somebody else has let it go. But REUSEADDR on win32
5037 means to let you bind to the port _even when somebody else
5038 already has it bound_! So, don't do that on Win32.
5039 - Change version parsing logic: a version is "obsolete" if it is not
5040 recommended and (1) there is a newer recommended version in the
5041 same series, or (2) there are no recommended versions in the same
5042 series, but there are some recommended versions in a newer series.
5043 A version is "new" if it is newer than any recommended version in
5045 - Stop most cases of hanging up on a socks connection without sending
5049 - Require BandwidthRate to be at least 20kB/s for servers.
5050 - When a dirserver causes you to give a warn, mention which dirserver
5052 - New config option DirAllowPrivateAddresses for authdirservers.
5053 Now by default they refuse router descriptors that have non-IP or
5054 private-IP addresses.
5055 - Stop publishing socksport in the directory, since it's not
5056 actually meant to be public. For compatibility, publish a 0 there
5058 - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
5059 smart" value, that is low for servers and high for clients.
5060 - If our clock jumps forward by 100 seconds or more, assume something
5061 has gone wrong with our network and abandon all not-yet-used circs.
5062 - Warn when exit policy implicitly allows local addresses.
5063 - If we get an incredibly skewed timestamp from a dirserver mirror
5064 that isn't a verified OR, don't warn -- it's probably him that's
5066 - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
5067 cookies to disk and doesn't log each web request to disk. (Thanks
5068 to Brett Carrington for pointing this out.)
5069 - When a client asks us for a dir mirror and we don't have one,
5070 launch an attempt to get a fresh one.
5071 - If we're hibernating and we get a SIGINT, exit immediately.
5072 - Add --with-dmalloc ./configure option, to track memory leaks.
5073 - And try to free all memory on closing, so we can detect what
5075 - Cache local dns resolves correctly even when they're .exit
5077 - Give a better warning when some other server advertises an
5078 ORPort that is actually an apache running ssl.
5079 - Add "opt hibernating 1" to server descriptor to make it clearer
5080 whether the server is hibernating.
5083 Changes in version 0.0.9.6 - 2005-03-24
5084 o Bugfixes on 0.0.9.x (crashes and asserts):
5085 - Add new end stream reasons to maintainance branch. Fix bug where
5086 reason (8) could trigger an assert. Prevent bug from recurring.
5087 - Apparently win32 stat wants paths to not end with a slash.
5088 - Fix assert triggers in assert_cpath_layer_ok(), where we were
5089 blowing away the circuit that conn->cpath_layer points to, then
5090 checking to see if the circ is well-formed. Backport check to make
5091 sure we dont use the cpath on a closed connection.
5092 - Prevent circuit_resume_edge_reading_helper() from trying to package
5093 inbufs for marked-for-close streams.
5094 - Don't crash on hup if your options->address has become unresolvable.
5095 - Some systems (like OS X) sometimes accept() a connection and tell
5096 you the remote host is 0.0.0.0:0. If this happens, due to some
5097 other mis-features, we get confused; so refuse the conn for now.
5099 o Bugfixes on 0.0.9.x (other):
5100 - Fix harmless but scary "Unrecognized content encoding" warn message.
5101 - Add new stream error reason: TORPROTOCOL reason means "you are not
5102 speaking a version of Tor I understand; say bye-bye to your stream."
5103 - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
5104 into the future, now that we are more tolerant of skew. This
5105 resolves a bug where a Tor server would refuse to cache a directory
5106 because all the directories it gets are too far in the future;
5107 yet the Tor server never logs any complaints about clock skew.
5108 - Mac packaging magic: make man pages useable, and do not overwrite
5109 existing torrc files.
5110 - Make OS X log happily to /var/log/tor/tor.log
5113 Changes in version 0.0.9.5 - 2005-02-22
5114 o Bugfixes on 0.0.9.x:
5115 - Fix an assert race at exit nodes when resolve requests fail.
5116 - Stop picking unverified dir mirrors--it only leads to misery.
5117 - Patch from Matt Edman to make NT services work better. Service
5118 support is still not compiled into the executable by default.
5119 - Patch from Dmitri Bely so the Tor service runs better under
5120 the win32 SYSTEM account.
5121 - Make tor-resolve actually work (?) on Win32.
5122 - Fix a sign bug when getrlimit claims to have 4+ billion
5123 file descriptors available.
5124 - Stop refusing to start when bandwidthburst == bandwidthrate.
5125 - When create cells have been on the onion queue more than five
5126 seconds, just send back a destroy and take them off the list.
5129 Changes in version 0.0.9.4 - 2005-02-03
5130 o Bugfixes on 0.0.9:
5131 - Fix an assert bug that took down most of our servers: when
5132 a server claims to have 1 GB of bandwidthburst, don't
5134 - Don't crash as badly if we have spawned the max allowed number
5135 of dnsworkers, or we're out of file descriptors.
5136 - Block more file-sharing ports in the default exit policy.
5137 - MaxConn is now automatically set to the hard limit of max
5138 file descriptors we're allowed (ulimit -n), minus a few for
5140 - Give a clearer message when servers need to raise their
5141 ulimit -n when they start running out of file descriptors.
5142 - SGI Compatibility patches from Jan Schaumann.
5143 - Tolerate a corrupt cached directory better.
5144 - When a dirserver hasn't approved your server, list which one.
5145 - Go into soft hibernation after 95% of the bandwidth is used,
5146 not 99%. This is especially important for daily hibernators who
5147 have a small accounting max. Hopefully it will result in fewer
5148 cut connections when the hard hibernation starts.
5149 - Load-balance better when using servers that claim more than
5150 800kB/s of capacity.
5151 - Make NT services work (experimental, only used if compiled in).
5154 Changes in version 0.0.9.3 - 2005-01-21
5155 o Bugfixes on 0.0.9:
5156 - Backport the cpu use fixes from main branch, so busy servers won't
5157 need as much processor time.
5158 - Work better when we go offline and then come back, or when we
5159 run Tor at boot before the network is up. We do this by
5160 optimistically trying to fetch a new directory whenever an
5161 application request comes in and we think we're offline -- the
5162 human is hopefully a good measure of when the network is back.
5163 - Backport some minimal hidserv bugfixes: keep rend circuits open as
5164 long as you keep using them; actually publish hidserv descriptors
5165 shortly after they change, rather than waiting 20-40 minutes.
5166 - Enable Mac startup script by default.
5167 - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
5168 - When you update AllowUnverifiedNodes or FirewallPorts via the
5169 controller's setconf feature, we were always appending, never
5171 - When you update HiddenServiceDir via setconf, it was screwing up
5172 the order of reading the lines, making it fail.
5173 - Do not rewrite a cached directory back to the cache; otherwise we
5174 will think it is recent and not fetch a newer one on startup.
5175 - Workaround for webservers that lie about Content-Encoding: Tor
5176 now tries to autodetect compressed directories and compression
5177 itself. This lets us Proxypass dir fetches through apache.
5180 Changes in version 0.0.9.2 - 2005-01-04
5181 o Bugfixes on 0.0.9 (crashes and asserts):
5182 - Fix an assert on startup when the disk is full and you're logging
5184 - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
5185 style address, then we'd crash.
5186 - Fix an assert trigger when the running-routers string we get from
5187 a dirserver is broken.
5188 - Make worker threads start and run on win32. Now win32 servers
5190 - Bandaid (not actually fix, but now it doesn't crash) an assert
5191 where the dns worker dies mysteriously and the main Tor process
5192 doesn't remember anything about the address it was resolving.
5194 o Bugfixes on 0.0.9 (Win32):
5195 - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
5196 name out of the warning/assert messages.
5197 - Fix a superficial "unhandled error on read" bug on win32.
5198 - The win32 installer no longer requires a click-through for our
5199 license, since our Free Software license grants rights but does not
5201 - Win32: When connecting to a dirserver fails, try another one
5202 immediately. (This was already working for non-win32 Tors.)
5203 - Stop trying to parse $HOME on win32 when hunting for default
5205 - Make tor-resolve.c work on win32 by calling network_init().
5207 o Bugfixes on 0.0.9 (other):
5208 - Make 0.0.9.x build on Solaris again.
5209 - Due to a fencepost error, we were blowing away the \n when reporting
5210 confvalue items in the controller. So asking for multiple config
5211 values at once couldn't work.
5212 - When listing circuits that are pending on an opening OR connection,
5213 if we're an OR we were listing circuits that *end* at us as
5214 being pending on every listener, dns/cpu worker, etc. Stop that.
5215 - Dirservers were failing to create 'running-routers' or 'directory'
5216 strings if we had more than some threshold of routers. Fix them so
5217 they can handle any number of routers.
5218 - Fix a superficial "Duplicate mark for close" bug.
5219 - Stop checking for clock skew for OR connections, even for servers.
5220 - Fix a fencepost error that was chopping off the last letter of any
5221 nickname that is the maximum allowed nickname length.
5222 - Update URLs in log messages so they point to the new website.
5223 - Fix a potential problem in mangling server private keys while
5224 writing to disk (not triggered yet, as far as we know).
5225 - Include the licenses for other free software we include in Tor,
5226 now that we're shipping binary distributions more regularly.
5229 Changes in version 0.0.9.1 - 2004-12-15
5230 o Bugfixes on 0.0.9:
5231 - Make hibernation actually work.
5232 - Make HashedControlPassword config option work.
5233 - When we're reporting event circuit status to a controller,
5234 don't use the stream status code.
5237 Changes in version 0.0.9 - 2004-12-12
5239 - Clean up manpage and torrc.sample file.
5240 - Clean up severities and text of log warnings.
5242 - Make servers trigger an assert when they enter hibernation.
5245 Changes in version 0.0.9rc7 - 2004-12-08
5246 o Bugfixes on 0.0.9rc:
5247 - Fix a stack-trashing crash when an exit node begins hibernating.
5248 - Avoid looking at unallocated memory while considering which
5249 ports we need to build circuits to cover.
5250 - Stop a sigpipe: when an 'end' cell races with eof from the app,
5251 we shouldn't hold-open-until-flush if the eof arrived first.
5252 - Fix a bug with init_cookie_authentication() in the controller.
5253 - When recommending new-format log lines, if the upper bound is
5254 LOG_ERR, leave it implicit.
5256 o Bugfixes on 0.0.8.1:
5257 - Fix a whole slew of memory leaks.
5258 - Fix isspace() and friends so they still make Solaris happy
5259 but also so they don't trigger asserts on win32.
5260 - Fix parse_iso_time on platforms without strptime (eg win32).
5261 - win32: tolerate extra "readable" events better.
5262 - win32: when being multithreaded, leave parent fdarray open.
5263 - Make unit tests work on win32.
5266 Changes in version 0.0.9rc6 - 2004-12-06
5267 o Bugfixes on 0.0.9pre:
5268 - Clean up some more integer underflow opportunities (not exploitable
5270 - While hibernating, hup should not regrow our listeners.
5271 - Send an end to the streams we close when we hibernate, rather
5272 than just chopping them off.
5273 - React to eof immediately on non-open edge connections.
5275 o Bugfixes on 0.0.8.1:
5276 - Calculate timeout for waiting for a connected cell from the time
5277 we sent the begin cell, not from the time the stream started. If
5278 it took a long time to establish the circuit, we would time out
5279 right after sending the begin cell.
5280 - Fix router_compare_addr_to_addr_policy: it was not treating a port
5281 of * as always matching, so we were picking reject *:* nodes as
5282 exit nodes too. Oops.
5285 - New circuit building strategy: keep a list of ports that we've
5286 used in the past 6 hours, and always try to have 2 circuits open
5287 or on the way that will handle each such port. Seed us with port
5288 80 so web users won't complain that Tor is "slow to start up".
5289 - Make kill -USR1 dump more useful stats about circuits.
5290 - When warning about retrying or giving up, print the address, so
5291 the user knows which one it's talking about.
5292 - If you haven't used a clean circuit in an hour, throw it away,
5293 just to be on the safe side. (This means after 6 hours a totally
5294 unused Tor client will have no circuits open.)
5297 Changes in version 0.0.9rc5 - 2004-12-01
5298 o Bugfixes on 0.0.8.1:
5299 - Disallow NDEBUG. We don't ever want anybody to turn off debug.
5300 - Let resolve conns retry/expire also, rather than sticking around
5302 - If we are using select, make sure we stay within FD_SETSIZE.
5304 o Bugfixes on 0.0.9pre:
5305 - Fix integer underflow in tor_vsnprintf() that may be exploitable,
5306 but doesn't seem to be currently; thanks to Ilja van Sprundel for
5308 - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
5309 instead. Impose minima and maxima for all *Period options; impose
5310 even tighter maxima for fetching if we are a caching dirserver.
5311 Clip rather than rejecting.
5312 - Fetch cached running-routers from servers that serve it (that is,
5313 authdirservers and servers running 0.0.9rc5-cvs or later.)
5316 - Accept *:706 (silc) in default exit policy.
5317 - Implement new versioning format for post 0.1.
5318 - Support "foo.nickname.exit" addresses, to let Alice request the
5319 address "foo" as viewed by exit node "nickname". Based on a patch
5321 - Make tor --version --version dump the cvs Id of every file.
5324 Changes in version 0.0.9rc4 - 2004-11-28
5325 o Bugfixes on 0.0.8.1:
5326 - Make windows sockets actually non-blocking (oops), and handle
5327 win32 socket errors better.
5329 o Bugfixes on 0.0.9rc1:
5330 - Actually catch the -USR2 signal.
5333 Changes in version 0.0.9rc3 - 2004-11-25
5334 o Bugfixes on 0.0.8.1:
5335 - Flush the log file descriptor after we print "Tor opening log file",
5336 so we don't see those messages days later.
5338 o Bugfixes on 0.0.9rc1:
5339 - Make tor-resolve work again.
5340 - Avoid infinite loop in tor-resolve if tor hangs up on it.
5341 - Fix an assert trigger for clients/servers handling resolves.
5344 Changes in version 0.0.9rc2 - 2004-11-24
5345 o Bugfixes on 0.0.9rc1:
5346 - I broke socks5 support while fixing the eof bug.
5347 - Allow unitless bandwidths and intervals; they default to bytes
5349 - New servers don't start out hibernating; they are active until
5350 they run out of bytes, so they have a better estimate of how
5351 long it takes, and so their operators can know they're working.
5354 Changes in version 0.0.9rc1 - 2004-11-23
5355 o Bugfixes on 0.0.8.1:
5356 - Finally fix a bug that's been plaguing us for a year:
5357 With high load, circuit package window was reaching 0. Whenever
5358 we got a circuit-level sendme, we were reading a lot on each
5359 socket, but only writing out a bit. So we would eventually reach
5360 eof. This would be noticed and acted on even when there were still
5361 bytes sitting in the inbuf.
5362 - When poll() is interrupted, we shouldn't believe the revents values.
5364 o Bugfixes on 0.0.9pre6:
5365 - Fix hibernate bug that caused pre6 to be broken.
5366 - Don't keep rephist info for routers that haven't had activity for
5367 24 hours. (This matters now that clients have keys, since we track
5369 - Never call close_temp_logs while validating log options.
5370 - Fix backslash-escaping on tor.sh.in and torctl.in.
5373 - Implement weekly/monthly/daily accounting: now you specify your
5374 hibernation properties by
5375 AccountingMax N bytes|KB|MB|GB|TB
5376 AccountingStart day|week|month [day] HH:MM
5377 Defaults to "month 1 0:00".
5378 - Let bandwidth and interval config options be specified as 5 bytes,
5379 kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
5380 - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
5381 get back to normal.)
5382 - If your requested entry or exit node has advertised bandwidth 0,
5384 - Be more greedy about filling up relay cells -- we try reading again
5385 once we've processed the stuff we read, in case enough has arrived
5386 to fill the last cell completely.
5387 - Apply NT service patch from Osamu Fujino. Still needs more work.
5390 Changes in version 0.0.9pre6 - 2004-11-15
5391 o Bugfixes on 0.0.8.1:
5392 - Fix assert failure on malformed socks4a requests.
5393 - Use identity comparison, not nickname comparison, to choose which
5394 half of circuit-ID-space each side gets to use. This is needed
5395 because sometimes we think of a router as a nickname, and sometimes
5396 as a hex ID, and we can't predict what the other side will do.
5397 - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
5398 write() call will fail and we handle it there.
5399 - Add a FAST_SMARTLIST define to optionally inline smartlist_get
5400 and smartlist_len, which are two major profiling offenders.
5402 o Bugfixes on 0.0.9pre5:
5403 - Fix a bug in read_all that was corrupting config files on windows.
5404 - When we're raising the max number of open file descriptors to
5405 'unlimited', don't log that we just raised it to '-1'.
5406 - Include event code with events, as required by control-spec.txt.
5407 - Don't give a fingerprint when clients do --list-fingerprint:
5408 it's misleading, because it will never be the same again.
5409 - Stop using strlcpy in tor_strndup, since it was slowing us
5411 - Remove warn on startup about missing cached-directory file.
5412 - Make kill -USR1 work again.
5413 - Hibernate if we start tor during the "wait for wakeup-time" phase
5414 of an accounting interval. Log our hibernation plans better.
5415 - Authoritative dirservers now also cache their directory, so they
5416 have it on start-up.
5419 - Fetch running-routers; cache running-routers; compress
5420 running-routers; serve compressed running-routers.z
5421 - Add NSI installer script contributed by J Doe.
5422 - Commit VC6 and VC7 workspace/project files.
5423 - Commit a tor.spec for making RPM files, with help from jbash.
5424 - Add contrib/torctl.in contributed by Glenn Fink.
5425 - Implement the control-spec's SAVECONF command, to write your
5426 configuration to torrc.
5427 - Get cookie authentication for the controller closer to working.
5428 - Include control-spec.txt in the tarball.
5429 - When set_conf changes our server descriptor, upload a new copy.
5430 But don't upload it too often if there are frequent changes.
5431 - Document authentication config in man page, and document signals
5433 - Clean up confusing parts of man page and torrc.sample.
5434 - Make expand_filename handle ~ and ~username.
5435 - Use autoconf to enable largefile support where necessary. Use
5436 ftello where available, since ftell can fail at 2GB.
5437 - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
5438 log more informatively.
5439 - Give a slightly more useful output for "tor -h".
5440 - Refuse application socks connections to port 0.
5441 - Check clock skew for verified servers, but allow unverified
5442 servers and clients to have any clock skew.
5443 - Break DirFetchPostPeriod into:
5444 - DirFetchPeriod for fetching full directory,
5445 - StatusFetchPeriod for fetching running-routers,
5446 - DirPostPeriod for posting server descriptor,
5447 - RendPostPeriod for posting hidden service descriptors.
5448 - Make sure the hidden service descriptors are at a random offset
5449 from each other, to hinder linkability.
5452 Changes in version 0.0.9pre5 - 2004-11-09
5453 o Bugfixes on 0.0.9pre4:
5454 - Fix a seg fault in unit tests (doesn't affect main program).
5455 - Fix an assert bug where a hidden service provider would fail if
5456 the first hop of his rendezvous circuit was down.
5457 - Hidden service operators now correctly handle version 1 style
5458 INTRODUCE1 cells (nobody generates them still, so not a critical
5460 - If do_hup fails, actually notice.
5461 - Handle more errnos from accept() without closing the listener.
5462 Some OpenBSD machines were closing their listeners because
5463 they ran out of file descriptors.
5464 - Send resolve cells to exit routers that are running a new
5465 enough version of the resolve code to work right.
5466 - Better handling of winsock includes on non-MSV win32 compilers.
5467 - Some people had wrapped their tor client/server in a script
5468 that would restart it whenever it died. This did not play well
5469 with our "shut down if your version is obsolete" code. Now people
5470 don't fetch a new directory if their local cached version is
5472 - Make our autogen.sh work on ksh as well as bash.
5475 - Hibernation: New config option "AccountingMaxKB" lets you
5476 set how many KBytes per month you want to allow your server to
5477 consume. Rather than spreading those bytes out evenly over the
5478 month, we instead hibernate for some of the month and pop up
5479 at a deterministic time, work until the bytes are consumed, then
5480 hibernate again. Config option "MonthlyAccountingStart" lets you
5481 specify which day of the month your billing cycle starts on.
5482 - Control interface: a separate program can now talk to your
5483 client/server over a socket, and get/set config options, receive
5484 notifications of circuits and streams starting/finishing/dying,
5485 bandwidth used, etc. The next step is to get some GUIs working.
5486 Let us know if you want to help out. See doc/control-spec.txt .
5487 - Ship a contrib/tor-control.py as an example script to interact
5488 with the control port.
5489 - "tor --hash-password zzyxz" will output a salted password for
5490 use in authenticating to the control interface.
5491 - New log format in config:
5492 "Log minsev[-maxsev] stdout|stderr|syslog" or
5493 "Log minsev[-maxsev] file /var/foo"
5496 - DirPolicy config option, to let people reject incoming addresses
5497 from their dirserver.
5498 - "tor --list-fingerprint" will list your identity key fingerprint
5500 - Add "pass" target for RedirectExit, to make it easier to break
5501 out of a sequence of RedirectExit rules.
5502 - Clients now generate a TLS cert too, in preparation for having
5503 them act more like real nodes.
5504 - Ship src/win32/ in the tarball, so people can use it to build.
5505 - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
5507 - New "router-status" line in directory, to better bind each verified
5508 nickname to its identity key.
5509 - Deprecate unofficial config option abbreviations, and abbreviations
5510 not on the command line.
5511 - Add a pure-C tor-resolve implementation.
5512 - Use getrlimit and friends to ensure we can reach MaxConn (currently
5513 1024) file descriptors.
5515 o Code security improvements, inspired by Ilja:
5516 - Replace sprintf with snprintf. (I think they were all safe, but
5518 - Replace strcpy/strncpy with strlcpy in more places.
5519 - Avoid strcat; use snprintf or strlcat instead.
5520 - snprintf wrapper with consistent (though not C99) overflow behavior.
5523 Changes in version 0.0.9pre4 - 2004-10-17
5524 o Bugfixes on 0.0.9pre3:
5525 - If the server doesn't specify an exit policy, use the real default
5526 exit policy, not reject *:*.
5527 - Ignore fascistfirewall when uploading/downloading hidden service
5528 descriptors, since we go through Tor for those; and when using
5529 an HttpProxy, since we assume it can reach them all.
5530 - When looking for an authoritative dirserver, use only the ones
5531 configured at boot. Don't bother looking in the directory.
5532 - The rest of the fix for get_default_conf_file() on older win32.
5533 - Make 'Routerfile' config option obsolete.
5536 - New 'MyFamily nick1,...' config option for a server to
5537 specify other servers that shouldn't be used in the same circuit
5538 with it. Only believed if nick1 also specifies us.
5539 - New 'NodeFamily nick1,nick2,...' config option for a client to
5540 specify nodes that it doesn't want to use in the same circuit.
5541 - New 'Redirectexit pattern address:port' config option for a
5542 server to redirect exit connections, e.g. to a local squid.
5545 Changes in version 0.0.9pre3 - 2004-10-13
5546 o Bugfixes on 0.0.8.1:
5547 - Better torrc example lines for dirbindaddress and orbindaddress.
5548 - Improved bounds checking on parsed ints (e.g. config options and
5549 the ones we find in directories.)
5550 - Better handling of size_t vs int, so we're more robust on 64
5552 - Fix the rest of the bug where a newly started OR would appear
5553 as unverified even after we've added his fingerprint and hupped
5555 - Fix a bug from 0.0.7: when read() failed on a stream, we would
5556 close it without sending back an end. So 'connection refused'
5557 would simply be ignored and the user would get no response.
5559 o Bugfixes on 0.0.9pre2:
5560 - Serving the cached-on-disk directory to people is bad. We now
5561 provide no directory until we've fetched a fresh one.
5562 - Workaround for bug on windows where cached-directories get crlf
5564 - Make get_default_conf_file() work on older windows too.
5565 - If we write a *:* exit policy line in the descriptor, don't write
5566 any more exit policy lines.
5569 - Use only 0.0.9pre1 and later servers for resolve cells.
5570 - Make the dirservers file obsolete.
5571 - Include a dir-signing-key token in directories to tell the
5572 parsing entity which key is being used to sign.
5573 - Remove the built-in bulky default dirservers string.
5574 - New config option "Dirserver %s:%d [fingerprint]", which can be
5575 repeated as many times as needed. If no dirservers specified,
5576 default to moria1,moria2,tor26.
5577 - Make moria2 advertise a dirport of 80, so people behind firewalls
5578 will be able to get a directory.
5579 - Http proxy support
5580 - Dirservers translate requests for http://%s:%d/x to /x
5581 - You can specify "HttpProxy %s[:%d]" and all dir fetches will
5582 be routed through this host.
5583 - Clients ask for /tor/x rather than /x for new enough dirservers.
5584 This way we can one day coexist peacefully with apache.
5585 - Clients specify a "Host: %s%d" http header, to be compatible
5586 with more proxies, and so running squid on an exit node can work.
5589 Changes in version 0.0.8.1 - 2004-10-13
5591 - Fix a seg fault that can be triggered remotely for Tor
5592 clients/servers with an open dirport.
5593 - Fix a rare assert trigger, where routerinfos for entries in
5594 our cpath would expire while we're building the path.
5595 - Fix a bug in OutboundBindAddress so it (hopefully) works.
5596 - Fix a rare seg fault for people running hidden services on
5597 intermittent connections.
5598 - Fix a bug in parsing opt keywords with objects.
5599 - Fix a stale pointer assert bug when a stream detaches and
5601 - Fix a string format vulnerability (probably not exploitable)
5602 in reporting stats locally.
5603 - Fix an assert trigger: sometimes launching circuits can fail
5604 immediately, e.g. because too many circuits have failed recently.
5605 - Fix a compile warning on 64 bit platforms.
5608 Changes in version 0.0.9pre2 - 2004-10-03
5610 - Make fetching a cached directory work for 64-bit platforms too.
5611 - Make zlib.h a required header, not an optional header.
5614 Changes in version 0.0.9pre1 - 2004-10-01
5616 - Stop using separate defaults for no-config-file and
5617 empty-config-file. Now you have to explicitly turn off SocksPort,
5618 if you don't want it open.
5619 - Fix a bug in OutboundBindAddress so it (hopefully) works.
5620 - Improve man page to mention more of the 0.0.8 features.
5621 - Fix a rare seg fault for people running hidden services on
5622 intermittent connections.
5623 - Change our file IO stuff (especially wrt OpenSSL) so win32 is
5625 - Fix more dns related bugs: send back resolve_failed and end cells
5626 more reliably when the resolve fails, rather than closing the
5627 circuit and then trying to send the cell. Also attach dummy resolve
5628 connections to a circuit *before* calling dns_resolve(), to fix
5629 a bug where cached answers would never be sent in RESOLVED cells.
5630 - When we run out of disk space, or other log writing error, don't
5631 crash. Just stop logging to that log and continue.
5632 - We were starting to daemonize before we opened our logs, so if
5633 there were any problems opening logs, we would complain to stderr,
5634 which wouldn't work, and then mysteriously exit.
5635 - Fix a rare bug where sometimes a verified OR would connect to us
5636 before he'd uploaded his descriptor, which would cause us to
5637 assign conn->nickname as though he's unverified. Now we look through
5638 the fingerprint list to see if he's there.
5639 - Fix a rare assert trigger, where routerinfos for entries in
5640 our cpath would expire while we're building the path.
5643 - Clients can ask dirservers for /dir.z to get a compressed version
5644 of the directory. Only works for servers running 0.0.9, of course.
5645 - Make clients cache directories and use them to seed their router
5646 lists at startup. This means clients have a datadir again.
5647 - Configuration infrastructure support for warning on obsolete
5649 - Respond to content-encoding headers by trying to uncompress as
5651 - Reply with a deflated directory when a client asks for "dir.z".
5652 We could use allow-encodings instead, but allow-encodings isn't
5653 specified in HTTP 1.0.
5654 - Raise the max dns workers from 50 to 100.
5655 - Discourage people from setting their dirfetchpostperiod more often
5656 than once per minute.
5657 - Protect dirservers from overzealous descriptor uploading -- wait
5658 10 seconds after directory gets dirty, before regenerating.
5661 Changes in version 0.0.8 - 2004-08-25
5662 o Port it to SunOS 5.9 / Athena
5665 Changes in version 0.0.8rc2 - 2004-08-20
5666 o Make it compile on cygwin again.
5667 o When picking unverified routers, skip those with low uptime and/or
5668 low bandwidth, depending on what properties you care about.
5671 Changes in version 0.0.8rc1 - 2004-08-18
5672 o Changes from 0.0.7.3:
5674 - Fix assert triggers: if the other side returns an address 0.0.0.0,
5675 don't put it into the client dns cache.
5676 - If a begin failed due to exit policy, but we believe the IP address
5677 should have been allowed, switch that router to exitpolicy reject *:*
5678 until we get our next directory.
5680 - Clients choose nodes proportional to advertised bandwidth.
5681 - Avoid using nodes with low uptime as introduction points.
5682 - Handle servers with dynamic IP addresses: don't replace
5683 options->Address with the resolved one at startup, and
5684 detect our address right before we make a routerinfo each time.
5685 - 'FascistFirewall' option to pick dirservers and ORs on specific
5686 ports; plus 'FirewallPorts' config option to tell FascistFirewall
5687 which ports are open. (Defaults to 80,443)
5688 - Be more aggressive about trying to make circuits when the network
5689 has changed (e.g. when you unsuspend your laptop).
5690 - Check for time skew on http headers; report date in response to
5692 - If the entrynode config line has only one node, don't pick it as
5694 - Add strict{entry|exit}nodes config options. If set to 1, then
5695 we refuse to build circuits that don't include the specified entry
5697 - OutboundBindAddress config option, to bind to a specific
5698 IP address for outgoing connect()s.
5699 - End truncated log entries (e.g. directories) with "[truncated]".
5701 o Patches to 0.0.8preX:
5703 - Patches to compile and run on win32 again (maybe)?
5704 - Fix crash when looking for ~/.torrc with no $HOME set.
5705 - Fix a race bug in the unit tests.
5706 - Handle verified/unverified name collisions better when new
5707 routerinfo's arrive in a directory.
5708 - Sometimes routers were getting entered into the stats before
5709 we'd assigned their identity_digest. Oops.
5710 - Only pick and establish intro points after we've gotten a
5713 - AllowUnverifiedNodes config option to let circuits choose no-name
5714 routers in entry,middle,exit,introduction,rendezvous positions.
5715 Allow middle and rendezvous positions by default.
5716 - Add a man page for tor-resolve.
5719 Changes in version 0.0.7.3 - 2004-08-12
5720 o Stop dnsworkers from triggering an assert failure when you
5721 ask them to resolve the host "".
5724 Changes in version 0.0.8pre3 - 2004-08-09
5725 o Changes from 0.0.7.2:
5726 - Allow multiple ORs with same nickname in routerlist -- now when
5727 people give us one identity key for a nickname, then later
5728 another, we don't constantly complain until the first expires.
5729 - Remember used bandwidth (both in and out), and publish 15-minute
5730 snapshots for the past day into our descriptor.
5731 - You can now fetch $DIRURL/running-routers to get just the
5732 running-routers line, not the whole descriptor list. (But
5733 clients don't use this yet.)
5734 - When people mistakenly use Tor as an http proxy, point them
5735 at the tor-doc.html rather than the INSTALL.
5736 - Remove our mostly unused -- and broken -- hex_encode()
5737 function. Use base16_encode() instead. (Thanks to Timo Lindfors
5738 for pointing out this bug.)
5739 - Rotate onion keys every 12 hours, not every 2 hours, so we have
5740 fewer problems with people using the wrong key.
5741 - Change the default exit policy to reject the default edonkey,
5742 kazaa, gnutella ports.
5743 - Add replace_file() to util.[ch] to handle win32's rename().
5745 o Changes from 0.0.8preX:
5746 - Fix two bugs in saving onion keys to disk when rotating, so
5747 hopefully we'll get fewer people using old onion keys.
5748 - Fix an assert error that was making SocksPolicy not work.
5749 - Be willing to expire routers that have an open dirport -- it's
5750 just the authoritative dirservers we want to not forget.
5751 - Reject tor-resolve requests for .onion addresses early, so we
5752 don't build a whole rendezvous circuit and then fail.
5753 - When you're warning a server that he's unverified, don't cry
5755 - Fix a race condition: don't try to extend onto a connection
5756 that's still handshaking.
5757 - For servers in clique mode, require the conn to be open before
5758 you'll choose it for your path.
5759 - Fix some cosmetic bugs about duplicate mark-for-close, lack of
5760 end relay cell, etc.
5761 - Measure bandwidth capacity over the last 24 hours, not just 12
5762 - Bugfix: authoritative dirservers were making and signing a new
5763 directory for each client, rather than reusing the cached one.
5766 Changes in version 0.0.8pre2 - 2004-08-04
5767 o Changes from 0.0.7.2:
5769 - Check directory signature _before_ you decide whether you're
5770 you're running an obsolete version and should exit.
5771 - Check directory signature _before_ you parse the running-routers
5772 list to decide who's running or verified.
5773 - Bugfixes and features:
5774 - Check return value of fclose while writing to disk, so we don't
5775 end up with broken files when servers run out of disk space.
5776 - Log a warning if the user uses an unsafe socks variant, so people
5777 are more likely to learn about privoxy or socat.
5778 - Dirservers now include RFC1123-style dates in the HTTP headers,
5779 which one day we will use to better detect clock skew.
5781 o Changes from 0.0.8pre1:
5782 - Make it compile without warnings again on win32.
5783 - Log a warning if you're running an unverified server, to let you
5784 know you might want to get it verified.
5785 - Only pick a default nickname if you plan to be a server.
5788 Changes in version 0.0.8pre1 - 2004-07-23
5790 - Made our unit tests compile again on OpenBSD 3.5, and tor
5791 itself compile again on OpenBSD on a sparc64.
5792 - We were neglecting milliseconds when logging on win32, so
5793 everything appeared to happen at the beginning of each second.
5796 - 'Extend' relay cell payloads now include the digest of the
5797 intended next hop's identity key. Now we can verify that we're
5798 extending to the right router, and also extend to routers we
5799 hadn't heard of before.
5802 - Tor nodes can now act as relays (with an advertised ORPort)
5803 without being manually verified by the dirserver operators.
5804 - Uploaded descriptors of unverified routers are now accepted
5805 by the dirservers, and included in the directory.
5806 - Verified routers are listed by nickname in the running-routers
5807 list; unverified routers are listed as "$<fingerprint>".
5808 - We now use hash-of-identity-key in most places rather than
5809 nickname or addr:port, for improved security/flexibility.
5810 - To avoid Sybil attacks, paths still use only verified servers.
5811 But now we have a chance to play around with hybrid approaches.
5812 - Nodes track bandwidth usage to estimate capacity (not used yet).
5813 - ClientOnly option for nodes that never want to become servers.
5814 - Directory caching.
5815 - "AuthoritativeDir 1" option for the official dirservers.
5816 - Now other nodes (clients and servers) will cache the latest
5817 directory they've pulled down.
5818 - They can enable their DirPort to serve it to others.
5819 - Clients will pull down a directory from any node with an open
5820 DirPort, and check the signature/timestamp correctly.
5821 - Authoritative dirservers now fetch directories from other
5822 authdirservers, to stay better synced.
5823 - Running-routers list tells who's down also, along with noting
5824 if they're verified (listed by nickname) or unverified (listed
5826 - Allow dirservers to serve running-router list separately.
5827 This isn't used yet.
5828 - ORs connect-on-demand to other ORs
5829 - If you get an extend cell to an OR you're not connected to,
5830 connect, handshake, and forward the create cell.
5831 - The authoritative dirservers stay connected to everybody,
5832 and everybody stays connected to 0.0.7 servers, but otherwise
5833 clients/servers expire unused connections after 5 minutes.
5834 - When servers get a sigint, they delay 30 seconds (refusing new
5835 connections) then exit. A second sigint causes immediate exit.
5836 - File and name management:
5837 - Look for .torrc if no CONFDIR "torrc" is found.
5838 - If no datadir is defined, then choose, make, and secure ~/.tor
5840 - If torrc not found, exitpolicy reject *:*.
5841 - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
5842 - If no nickname is defined, derive default from hostname.
5843 - Rename secret key files, e.g. identity.key -> secret_id_key,
5844 to discourage people from mailing their identity key to tor-ops.
5845 - Refuse to build a circuit before the directory has arrived --
5846 it won't work anyway, since you won't know the right onion keys
5848 - Try other dirservers immediately if the one you try is down. This
5849 should tolerate down dirservers better now.
5850 - Parse tor version numbers so we can do an is-newer-than check
5851 rather than an is-in-the-list check.
5852 - New socks command 'resolve', to let us shim gethostbyname()
5854 - A 'tor_resolve' script to access the socks resolve functionality.
5855 - A new socks-extensions.txt doc file to describe our
5856 interpretation and extensions to the socks protocols.
5857 - Add a ContactInfo option, which gets published in descriptor.
5858 - Publish OR uptime in descriptor (and thus in directory) too.
5859 - Write tor version at the top of each log file
5860 - New docs in the tarball:
5862 - Document that you should proxy your SSL traffic too.
5865 Changes in version 0.0.7.2 - 2004-07-07
5866 o A better fix for the 0.0.0.0 problem, that will hopefully
5867 eliminate the remaining related assertion failures.
5870 Changes in version 0.0.7.1 - 2004-07-04
5871 o When an address resolves to 0.0.0.0, treat it as a failed resolve,
5872 since internally we use 0.0.0.0 to signify "not yet resolved".
5875 Changes in version 0.0.7 - 2004-06-07
5876 o Updated the man page to reflect the new features.
5879 Changes in version 0.0.7rc2 - 2004-06-06
5880 o Changes from 0.0.7rc1:
5881 - Make it build on Win32 again.
5882 o Changes from 0.0.6.2:
5883 - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
5887 Changes in version 0.0.7rc1 - 2004-06-02
5889 - On sighup, we were adding another log without removing the first
5890 one. So log messages would get duplicated n times for n sighups.
5891 - Several cases of using a connection after we'd freed it. The
5892 problem was that connections that are pending resolve are in both
5893 the pending_resolve tree, and also the circuit's resolving_streams
5894 list. When you want to remove one, you must remove it from both.
5895 - Fix a double-mark-for-close where an end cell arrived for a
5896 resolving stream, and then the resolve failed.
5897 - Check directory signatures based on name of signer, not on whom
5898 we got the directory from. This will let us cache directories more
5901 - Crank up some of our constants to handle more users.
5904 Changes in version 0.0.7pre1 - 2004-06-02
5905 o Fixes for crashes and other obnoxious bugs:
5906 - Fix an epipe bug: sometimes when directory connections failed
5907 to connect, we would give them a chance to flush before closing
5909 - When we detached from a circuit because of resolvefailed, we
5910 would immediately try the same circuit twice more, and then
5911 give up on the resolve thinking we'd tried three different
5913 - Limit the number of intro circuits we'll attempt to build for a
5914 hidden service per 15-minute period.
5915 - Check recommended-software string *early*, before actually parsing
5916 the directory. Thus we can detect an obsolete version and exit,
5917 even if the new directory format doesn't parse.
5918 o Fixes for security bugs:
5919 - Remember which nodes are dirservers when you startup, and if a
5920 random OR enables his dirport, don't automatically assume he's
5921 a trusted dirserver.
5923 - Directory connections were asking the wrong poll socket to
5924 start writing, and not asking themselves to start writing.
5925 - When we detached from a circuit because we sent a begin but
5926 didn't get a connected, we would use it again the first time;
5927 but after that we would correctly switch to a different one.
5928 - Stop warning when the first onion decrypt attempt fails; they
5929 will sometimes legitimately fail now that we rotate keys.
5930 - Override unaligned-access-ok check when $host_cpu is ia64 or
5931 arm. Apparently they allow it but the kernel whines.
5932 - Dirservers try to reconnect periodically too, in case connections
5934 - Fix some memory leaks in directory servers.
5935 - Allow backslash in Win32 filenames.
5936 - Made Tor build complain-free on FreeBSD, hopefully without
5937 breaking other BSD builds. We'll see.
5939 - Doxygen markup on all functions and global variables.
5940 - Make directory functions update routerlist, not replace it. So
5941 now directory disagreements are not so critical a problem.
5942 - Remove the upper limit on number of descriptors in a dirserver's
5943 directory (not that we were anywhere close).
5944 - Allow multiple logfiles at different severity ranges.
5945 - Allow *BindAddress to specify ":port" rather than setting *Port
5946 separately. Allow multiple instances of each BindAddress config
5947 option, so you can bind to multiple interfaces if you want.
5948 - Allow multiple exit policy lines, which are processed in order.
5949 Now we don't need that huge line with all the commas in it.
5950 - Enable accept/reject policies on SOCKS connections, so you can bind
5951 to 0.0.0.0 but still control who can use your OP.
5954 Changes in version 0.0.6.2 - 2004-05-16
5955 o Our integrity-checking digest was checking only the most recent cell,
5956 not the previous cells like we'd thought.
5957 Thanks to Stefan Mark for finding the flaw!
5960 Changes in version 0.0.6.1 - 2004-05-06
5961 o Fix two bugs in our AES counter-mode implementation (this affected
5962 onion-level stream encryption, but not TLS-level). It turns
5963 out we were doing something much more akin to a 16-character
5964 polyalphabetic cipher. Oops.
5965 Thanks to Stefan Mark for finding the flaw!
5966 o Retire moria3 as a directory server, and add tor26 as a directory
5970 Changes in version 0.0.6 - 2004-05-02
5974 Changes in version 0.0.6rc4 - 2004-05-01
5975 o Update the built-in dirservers list to use the new directory format
5976 o Fix a rare seg fault: if a node offering a hidden service attempts
5977 to build a circuit to Alice's rendezvous point and fails before it
5978 reaches the last hop, it retries with a different circuit, but
5980 o Handle windows socket errors correctly.
5983 Changes in version 0.0.6rc3 - 2004-04-28
5984 o Don't expire non-general excess circuits (if we had enough
5985 circuits open, we were expiring rendezvous circuits -- even
5986 when they had a stream attached. oops.)
5987 o Fetch randomness from /dev/urandom better (not via fopen/fread)
5988 o Better debugging for tls errors
5989 o Some versions of openssl have an SSL_pending function that erroneously
5990 returns bytes when there is a non-application record pending.
5991 o Set Content-Type on the directory and hidserv descriptor.
5992 o Remove IVs from cipher code, since AES-ctr has none.
5993 o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
5994 o We were using an array of length zero in a few places.
5995 o win32's gethostbyname can't resolve an IP to an IP.
5996 o win32's close can't close a socket.
5999 Changes in version 0.0.6rc2 - 2004-04-26
6000 o Fix a bug where we were closing tls connections intermittently.
6001 It turns out openssl keeps its errors around -- so if an error
6002 happens, and you don't ask about it, and then another openssl
6003 operation happens and succeeds, and you ask if there was an error,
6004 it tells you about the first error. Fun fun.
6005 o Fix a bug that's been lurking since 27 may 03 (!)
6006 When passing back a destroy cell, we would use the wrong circ id.
6007 'Mostly harmless', but still worth fixing.
6008 o Since we don't support truncateds much, don't bother sending them;
6009 just close the circ.
6010 o check for <machine/limits.h> so we build on NetBSD again (I hope).
6011 o don't crash if a conn that sent a begin has suddenly lost its circuit
6012 (this was quite rare).
6015 Changes in version 0.0.6rc1 - 2004-04-25
6016 o We now rotate link (tls context) keys and onion keys.
6017 o CREATE cells now include oaep padding, so you can tell
6018 if you decrypted them correctly.
6019 o Add bandwidthburst to server descriptor.
6020 o Directories now say which dirserver signed them.
6021 o Use a tor_assert macro that logs failed assertions too.
6024 Changes in version 0.0.6pre5 - 2004-04-18
6025 o changes from 0.0.6pre4:
6026 - make tor build on broken freebsd 5.2 installs
6027 - fix a failed assert when you try an intro point, get a nack, and try
6028 a second one and it works.
6029 - when alice uses a port that the hidden service doesn't accept,
6030 it now sends back an end cell (denied by exit policy). otherwise
6031 alice would just have to wait to time out.
6032 - fix another rare bug: when we had tried all the intro
6033 points for a hidden service, we fetched the descriptor
6034 again, but we left our introcirc thinking it had already
6035 sent an intro, so it kept waiting for a response...
6036 - bugfix: when you sleep your hidden-service laptop, as soon
6037 as it wakes up it tries to upload a service descriptor, but
6038 socketpair fails for some reason (localhost not up yet?).
6039 now we simply give up on that upload, and we'll try again later.
6040 i'd still like to find the bug though.
6041 - if an intro circ waiting for an ack dies before getting one, then
6043 - we were reusing stale service descriptors and refetching usable
6047 Changes in version 0.0.6pre4 - 2004-04-14
6048 o changes from 0.0.6pre3:
6049 - when bob fails to connect to the rendezvous point, and his
6050 circ didn't fail because of the rendezvous point itself, then
6051 he retries a couple of times
6052 - we expire introduction and rendezvous circs more thoroughly
6053 (sometimes they were hanging around forever)
6054 - we expire unattached rendezvous streams that have been around
6055 too long (they were sticking around forever).
6056 - fix a measly fencepost error that was crashing everybody with
6060 Changes in version 0.0.6pre3 - 2004-04-14
6061 o changes from 0.0.6pre2:
6062 - make hup work again
6063 - fix some memory leaks for dirservers
6064 - allow more skew in rendezvous descriptor timestamps, to help
6065 handle people like blanu who don't know what time it is
6066 - normal circs are 3 hops, but some rend/intro circs are 4, if
6067 the initiator doesn't get to choose the last hop
6068 - send acks for introductions, so alice can know whether to try
6070 - bob publishes intro points more correctly
6071 o changes from 0.0.5:
6072 - fix an assert trigger that's been plaguing us since the days
6073 of 0.0.2prexx (thanks weasel!)
6074 - retry stream correctly when we fail to connect because of
6075 exit-policy-reject (should try another) or can't-resolve-address
6076 (also should try another, because dns on random internet servers
6078 - when we hup a dirserver and we've *removed* a server from the
6079 approved-routers list, now we remove that server from the
6080 in-memory directories too
6083 Changes in version 0.0.6pre2 - 2004-04-08
6084 o We fixed our base32 implementation. Now it works on all architectures.
6087 Changes in version 0.0.6pre1 - 2004-04-08
6089 - Hidden services and rendezvous points are implemented. Go to
6090 http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
6091 hidden services. (This only works via a socks4a proxy such as
6092 Privoxy, and currently it's quite slow.)
6095 Changes in version 0.0.5 - 2004-03-30
6099 Changes in version 0.0.5rc3 - 2004-03-29
6100 o Install torrc as torrc.sample -- we no longer clobber your
6102 o Re-enable recommendedversion checking (we broke it in rc2, oops)
6103 o Add in a 'notice' log level for things the operator should hear
6104 but that aren't warnings
6107 Changes in version 0.0.5rc2 - 2004-03-29
6108 o Hold socks connection open until reply is flushed (if possible)
6109 o Make exit nodes resolve IPs to IPs immediately, rather than asking
6110 the dns farm to do it.
6111 o Fix c99 aliasing warnings in rephist.c
6112 o Don't include server descriptors that are older than 24 hours in the
6114 o Give socks 'reject' replies their whole 15s to attempt to flush,
6115 rather than seeing the 60s timeout and assuming the flush had failed.
6116 o Clean automake droppings from the cvs repository
6119 Changes in version 0.0.5rc1 - 2004-03-28
6120 o Fix mangled-state bug in directory fetching (was causing sigpipes).
6121 o Only build circuits after we've fetched the directory: clients were
6122 using only the directory servers before they'd fetched a directory.
6123 This also means longer startup time; so it goes.
6124 o Fix an assert trigger where an OP would fail to handshake, and we'd
6125 expect it to have a nickname.
6126 o Work around a tsocks bug: do a socks reject when AP connection dies
6127 early, else tsocks goes into an infinite loop.
6130 Changes in version 0.0.4 - 2004-03-26
6131 o When connecting to a dirserver or OR and the network is down,
6135 Changes in version 0.0.3 - 2004-03-26
6136 o Warn and fail if server chose a nickname with illegal characters
6137 o Port to Solaris and Sparc:
6138 - include missing header fcntl.h
6139 - have autoconf find -lsocket -lnsl automatically
6140 - deal with hardware word alignment
6141 - make uname() work (solaris has a different return convention)
6142 - switch from using signal() to sigaction()
6143 o Preliminary work on reputation system:
6144 - Keep statistics on success/fail of connect attempts; they're published
6145 by kill -USR1 currently.
6146 - Add a RunTesting option to try to learn link state by creating test
6147 circuits, even when SocksPort is off.
6148 - Remove unused open circuits when there are too many.
6151 Changes in version 0.0.2 - 2004-03-19
6152 - Include strlcpy and strlcat for safer string ops
6153 - define INADDR_NONE so we compile (but still not run) on solaris
6156 Changes in version 0.0.2pre27 - 2004-03-14
6158 - Allow internal tor networks (we were rejecting internal IPs,
6159 now we allow them if they're set explicitly).
6160 - And fix a few endian issues.
6163 Changes in version 0.0.2pre26 - 2004-03-14
6165 - If a stream times out after 15s without a connected cell, don't
6166 try that circuit again: try a new one.
6167 - Retry streams at most 4 times. Then give up.
6168 - When a dirserver gets a descriptor from an unknown router, it
6169 logs its fingerprint (so the dirserver operator can choose to
6170 accept it even without mail from the server operator).
6171 - Inform unapproved servers when we reject their descriptors.
6172 - Make tor build on Windows again. It works as a client, who knows
6174 - Clearer instructions in the torrc for how to set up a server.
6175 - Be more efficient about reading fd's when our global token bucket
6176 (used for rate limiting) becomes empty.
6178 - Stop asserting that computers always go forward in time. It's
6180 - When we sent a cell (e.g. destroy) and then marked an OR connection
6181 expired, we might close it before finishing a flush if the other
6182 side isn't reading right then.
6183 - Don't allow dirservers to start if they haven't defined
6185 - We were caching transient dns failures. Oops.
6186 - Prevent servers from publishing an internal IP as their address.
6187 - Address a strcat vulnerability in circuit.c
6190 Changes in version 0.0.2pre25 - 2004-03-04
6192 - Put the OR's IP in its router descriptor, not its fqdn. That way
6193 we'll stop being stalled by gethostbyname for nodes with flaky dns,
6196 - If the user typed in an address that didn't resolve, the server
6200 Changes in version 0.0.2pre24 - 2004-03-03
6202 - Fix an assertion failure in dns.c, where we were trying to dequeue
6203 a pending dns resolve even if it wasn't pending
6204 - Fix a spurious socks5 warning about still trying to write after the
6205 connection is finished.
6206 - Hold certain marked_for_close connections open until they're finished
6207 flushing, rather than losing bytes by closing them too early.
6208 - Correctly report the reason for ending a stream
6209 - Remove some duplicate calls to connection_mark_for_close
6210 - Put switch_id and start_daemon earlier in the boot sequence, so it
6211 will actually try to chdir() to options.DataDirectory
6212 - Make 'make test' exit(1) if a test fails; fix some unit tests
6213 - Make tor fail when you use a config option it doesn't know about,
6214 rather than warn and continue.
6215 - Make --version work
6216 - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
6219 Changes in version 0.0.2pre23 - 2004-02-29
6221 - Print a statement when the first circ is finished, so the user
6223 - If a relay cell is unrecognized at the end of the circuit,
6224 send back a destroy. (So attacks to mutate cells are more
6226 - New config option 'excludenodes' to avoid certain nodes for circuits.
6227 - When it daemonizes, it chdir's to the DataDirectory rather than "/",
6228 so you can collect coredumps there.
6230 - Fix a bug in tls flushing where sometimes data got wedged and
6231 didn't flush until more data got sent. Hopefully this bug was
6232 a big factor in the random delays we were seeing.
6233 - Make 'connected' cells include the resolved IP, so the client
6234 dns cache actually gets populated.
6235 - Disallow changing from ORPort=0 to ORPort>0 on hup.
6236 - When we time-out on a stream and detach from the circuit, send an
6237 end cell down it first.
6238 - Only warn about an unknown router (in exitnodes, entrynodes,
6239 excludenodes) after we've fetched a directory.
6242 Changes in version 0.0.2pre22 - 2004-02-26
6244 - Servers publish less revealing uname information in descriptors.
6245 - More memory tracking and assertions, to crash more usefully when
6247 - If the default torrc isn't there, just use some default defaults.
6248 Plus provide an internal dirservers file if they don't have one.
6249 - When the user tries to use Tor as an http proxy, give them an http
6250 501 failure explaining that we're a socks proxy.
6251 - Dump a new router.desc on hup, to help confused people who change
6252 their exit policies and then wonder why router.desc doesn't reflect
6254 - Clean up the generic tor.sh init script that we ship with.
6256 - If the exit stream is pending on the resolve, and a destroy arrives,
6257 then the stream wasn't getting removed from the pending list. I
6258 think this was the one causing recent server crashes.
6259 - Use a more robust poll on OSX 10.3, since their poll is flaky.
6260 - When it couldn't resolve any dirservers, it was useless from then on.
6261 Now it reloads the RouterFile (or default dirservers) if it has no
6263 - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
6264 many users don't even *have* a /usr/local/sbin/.
6267 Changes in version 0.0.2pre21 - 2004-02-18
6269 - There's a ChangeLog file that actually reflects the changelog.
6270 - There's a 'torify' wrapper script, with an accompanying
6271 tor-tsocks.conf, that simplifies the process of using tsocks for
6272 tor. It even has a man page.
6273 - The tor binary gets installed to sbin rather than bin now.
6274 - Retry streams where the connected cell hasn't arrived in 15 seconds
6275 - Clean up exit policy handling -- get the default out of the torrc,
6276 so we can update it without forcing each server operator to fix
6278 - Allow imaps and pop3s in default exit policy
6280 - Prevent picking middleman nodes as the last node in the circuit
6283 Changes in version 0.0.2pre20 - 2004-01-30
6285 - We now have a deb package, and it's in debian unstable. Go to
6287 - I've split the TotalBandwidth option into BandwidthRate (how many
6288 bytes per second you want to allow, long-term) and
6289 BandwidthBurst (how many bytes you will allow at once before the cap
6290 kicks in). This better token bucket approach lets you, say, set
6291 BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
6292 performance while not exceeding your monthly bandwidth quota.
6293 - Push out a tls record's worth of data once you've got it, rather
6294 than waiting until you've read everything waiting to be read. This
6295 may improve performance by pipelining better. We'll see.
6296 - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
6297 from failed circuits (if they haven't been connected yet) and attach
6299 - Expire old streams that haven't managed to connect. Some day we'll
6300 have them reattach to new circuits instead.
6303 - Fix several memory leaks that were causing servers to become bloated
6305 - Fix a few very rare assert triggers. A few more remain.
6306 - Setuid to User _before_ complaining about running as root.
6309 Changes in version 0.0.2pre19 - 2004-01-07
6311 - Fix deadlock condition in dns farm. We were telling a child to die by
6312 closing the parent's file descriptor to him. But newer children were
6313 inheriting the open file descriptor from the parent, and since they
6314 weren't closing it, the socket never closed, so the child never read
6315 eof, so he never knew to exit. Similarly, dns workers were holding
6316 open other sockets, leading to all sorts of chaos.
6317 - New cleaner daemon() code for forking and backgrounding.
6318 - If you log to a file, it now prints an entry at the top of the
6319 logfile so you know it's working.
6320 - The onionskin challenge length was 30 bytes longer than necessary.
6321 - Started to patch up the spec so it's not quite so out of date.
6324 Changes in version 0.0.2pre18 - 2004-01-02
6326 - Fix endian issues with the 'integrity' field in the relay header.
6327 - Fix a potential bug where connections in state
6328 AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
6331 Changes in version 0.0.2pre17 - 2003-12-30
6333 - Made --debuglogfile (or any second log file, actually) work.
6334 - Resolved an edge case in get_unique_circ_id_by_conn where a smart
6335 adversary could force us into an infinite loop.
6338 - Each onionskin handshake now includes a hash of the computed key,
6339 to prove the server's identity and help perfect forward secrecy.
6340 - Changed cell size from 256 to 512 bytes (working toward compatibility
6342 - Changed cell length to 2 bytes, and moved it to the relay header.
6343 - Implemented end-to-end integrity checking for the payloads of
6345 - Separated streamid from 'recognized' (otherwise circuits will get
6346 messed up when we try to have streams exit from the middle). We
6347 use the integrity-checking to confirm that a cell is addressed to
6349 - Randomize the initial circid and streamid values, so an adversary who
6350 breaks into a node can't learn how many circuits or streams have
6354 Changes in version 0.0.2pre16 - 2003-12-14
6356 - Fixed a bug that made HUP trigger an assert
6357 - Fixed a bug where a circuit that immediately failed wasn't being
6358 counted as a failed circuit in counting retries.
6361 - Now we close the circuit when we get a truncated cell: otherwise we're
6362 open to an anonymity attack where a bad node in the path truncates
6363 the circuit and then we open streams at him.
6364 - Add port ranges to exit policies
6365 - Add a conservative default exit policy
6366 - Warn if you're running tor as root
6367 - on HUP, retry OR connections and close/rebind listeners
6368 - options.EntryNodes: try these nodes first when picking the first node
6369 - options.ExitNodes: if your best choices happen to include any of
6370 your preferred exit nodes, you choose among just those preferred
6372 - options.ExcludedNodes: nodes that are never picked in path building
6375 Changes in version 0.0.2pre15 - 2003-12-03
6376 o Robustness and bugfixes:
6377 - Sometimes clients would cache incorrect DNS resolves, which would
6378 really screw things up.
6379 - An OP that goes offline would slowly leak all its sockets and stop
6381 - A wide variety of bugfixes in exit node selection, exit policy
6382 handling, and processing pending streams when a new circuit is
6384 - Pick nodes for a path only from those the directory says are up
6385 - Choose randomly from all running dirservers, not always the first one
6386 - Increase allowed http header size for directory fetch.
6387 - Stop writing to stderr (if we're daemonized it will be closed).
6388 - Enable -g always, so cores will be more useful to me.
6389 - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
6392 - Wrote a man page. It lists commonly used options.
6395 - Change default loglevel to warn.
6396 - Make PidFile default to null rather than littering in your CWD.
6397 - OnionRouter config option is now obsolete. Instead it just checks
6399 - Moved to a single unified torrc file for both clients and servers.
6402 Changes in version 0.0.2pre14 - 2003-11-29
6403 o Robustness and bugfixes:
6404 - Force the admin to make the DataDirectory himself
6405 - to get ownership/permissions right
6406 - so clients no longer make a DataDirectory and then never use it
6407 - fix bug where a client who was offline for 45 minutes would never
6408 pull down a directory again
6409 - fix (or at least hide really well) the dns assert bug that was
6410 causing server crashes
6411 - warnings and improved robustness wrt clockskew for certs
6412 - use the native daemon(3) to daemonize, when available
6413 - exit if bind() fails
6414 - exit if neither socksport nor orport is defined
6415 - include our own tor_timegm (Win32 doesn't have its own)
6416 - bugfix for win32 with lots of connections
6417 - fix minor bias in PRNG
6418 - make dirserver more robust to corrupt cached directory
6421 - Wrote the design document (woo)
6423 o Circuit building and exit policies:
6424 - Circuits no longer try to use nodes that the directory has told them
6426 - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
6427 bitcounts (18.0.0.0/8).
6428 - Make AP connections standby for a circuit if no suitable circuit
6429 exists, rather than failing
6430 - Circuits choose exit node based on addr/port, exit policies, and
6431 which AP connections are standing by
6432 - Bump min pathlen from 2 to 3
6433 - Relay end cells have a payload to describe why the stream ended.
6434 - If the stream failed because of exit policy, try again with a new
6436 - Clients have a dns cache to remember resolved addresses.
6437 - Notice more quickly when we have no working circuits
6440 - APPort is now called SocksPort
6441 - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
6443 - RecommendedVersions is now a config variable rather than
6444 hardcoded (for dirservers)
6445 - Reloads config on HUP
6446 - Usage info on -h or --help
6447 - If you set User and Group config vars, it'll setu/gid to them.
6449 Changes in version 0.0.2pre13 - 2003-10-19
6450 o General stability:
6451 - SSL_write no longer fails when it returns WANTWRITE and the number
6452 of bytes in the buf has changed by the next SSL_write call.
6453 - Fix segfault fetching directory when network is down
6454 - Fix a variety of minor memory leaks
6455 - Dirservers reload the fingerprints file on HUP, so I don't have
6456 to take down the network when I approve a new router
6457 - Default server config file has explicit Address line to specify fqdn
6460 - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
6461 - Make listener connections not ever alloc bufs
6463 o Autoconf improvements:
6464 - don't clobber an external CFLAGS in ./configure
6465 - Make install now works
6466 - create var/lib/tor on make install
6467 - autocreate a tor.sh initscript to help distribs
6468 - autocreate the torrc and sample-server-torrc with correct paths
6470 o Log files and Daemonizing now work:
6471 - If --DebugLogFile is specified, log to it at -l debug
6472 - If --LogFile is specified, use it instead of commandline
6473 - If --RunAsDaemon is set, tor forks and backgrounds on startup