ChangeLog 224 KB

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  1. Changes in version 0.2.0.3-alpha - 2007-??-??
  2. o Minor features:
  3. - Create listener connections before we setuid to the configured User and
  4. Group. This way, you can choose port values under 1024, start Tor as
  5. root, and have Tor bind those ports before it changes to another UID.
  6. - tor-gencert creates all files as readable to the file creator only, and
  7. write-protects the authority identity key.
  8. o Minor features (directory authority):
  9. - Fail quickly and (relatively) harmlessly if we generate a network
  10. status document that is somehow malformed.
  11. o Deprecated features:
  12. - RedirectExits is now deprecated.
  13. o Minor feature (controller):
  14. - You can now use the ControlSocket option to tell Tor to listen for
  15. controller connections on Unix domain sockets on systems that support
  16. them. (Patch from Peter Palfrader.)
  17. o Minor bugfixes (directory):
  18. - Fix another crash bug related to extra-info caching. (Bug found by
  19. Peter Palfrader.) [Bugfix on 0.2.0.2-alpha]
  20. o Minor bugfixes (dns):
  21. - Fix a crash when DNSPort is set more than once. (Patch from Robert
  22. Hogan.) [Bugfix on 0.2.0.2-alpha]
  23. o Minor bugfixes (hidden services):
  24. - Stop tearing down the whole circuit when the user asks for a
  25. connection to a port that the hidden service didn't configure.
  26. Resolves bug 444. [Bugfix on 0.1.2.x]
  27. o Minor bugfixes (versioning):
  28. - Stop under-counting the number of authorities that recommend each
  29. version. [Bugfix on 0.1.2.x]
  30. Changes in version 0.2.0.2-alpha - 2007-06-02
  31. o Major bugfixes on 0.2.0.1-alpha:
  32. - Fix an assertion failure related to servers without extra-info digests.
  33. Resolves bugs 441 and 442.
  34. o Minor features (directory):
  35. - Support "If-Modified-Since" when answering HTTP requests for
  36. directories, running-routers documents, and network-status documents.
  37. (There's no need to support it for router descriptors, since those
  38. are downloaded by descriptor digest.)
  39. o Minor build issues:
  40. - Clear up some MIPSPro compiler warnings.
  41. - When building from a tarball on a machine that happens to have SVK
  42. installed, report the micro-revision as whatever version existed
  43. in the tarball, not as "x".
  44. Changes in version 0.2.0.1-alpha - 2007-06-01
  45. o Major features, server usability:
  46. - New config options RelayBandwidthRate and RelayBandwidthBurst:
  47. a separate set of token buckets for relayed traffic. Right now
  48. relayed traffic is defined as answers to directory requests, and
  49. OR connections that don't have any local circuits on them.
  50. o Major features, client usability:
  51. - A client-side DNS proxy feature to replace the need for
  52. dns-proxy-tor: Just set "DNSPort 9999", and Tor will now listen
  53. for DNS requests on port 9999, use the Tor network to resolve them
  54. anonymously, and send the reply back like a regular DNS server.
  55. The code still only implements a subset of DNS.
  56. - Make PreferTunneledDirConns and TunnelDirConns work even when
  57. we have no cached directory info. This means Tor clients can now
  58. do all of their connections protected by TLS.
  59. o Major features, performance and efficiency:
  60. - Directory authorities accept and serve "extra info" documents for
  61. routers. These documents contain fields from router descriptors
  62. that aren't usually needed, and that use a lot of excess
  63. bandwidth. Once these fields are removed from router descriptors,
  64. the bandwidth savings should be about 60%. [Partially implements
  65. proposal 104.]
  66. - Servers upload extra-info documents to any authority that accepts
  67. them. Authorities (and caches that have been configured to download
  68. extra-info documents) download them as needed. [Partially implements
  69. proposal 104.]
  70. - Change the way that Tor buffers data that it is waiting to write.
  71. Instead of queueing data cells in an enormous ring buffer for each
  72. client->OR or OR->OR connection, we now queue cells on a separate
  73. queue for each circuit. This lets us use less slack memory, and
  74. will eventually let us be smarter about prioritizing different kinds
  75. of traffic.
  76. - Use memory pools to allocate cells with better speed and memory
  77. efficiency, especially on platforms where malloc() is inefficient.
  78. - Stop reading on edge connections when their corresponding circuit
  79. buffers are full; start again as the circuits empty out.
  80. o Major features, other:
  81. - Add an HSAuthorityRecordStats option that hidden service authorities
  82. can use to track statistics of overall hidden service usage without
  83. logging information that would be very useful to an attacker.
  84. - Start work implementing multi-level keys for directory authorities:
  85. Add a standalone tool to generate key certificates. (Proposal 103.)
  86. o Security fixes:
  87. - Directory authorities now call routers stable if they have an
  88. uptime of at least 30 days, even if that's not the median uptime
  89. in the network. Implements proposal 107, suggested by Kevin Bauer
  90. and Damon McCoy.
  91. o Minor fixes (resource management):
  92. - Count the number of open sockets separately from the number
  93. of active connection_t objects. This will let us avoid underusing
  94. our allocated connection limit.
  95. - We no longer use socket pairs to link an edge connection to an
  96. anonymous directory connection or a DirPort test connection.
  97. Instead, we track the link internally and transfer the data
  98. in-process. This saves two sockets per "linked" connection (at the
  99. client and at the server), and avoids the nasty Windows socketpair()
  100. workaround.
  101. - Keep unused 4k and 16k buffers on free lists, rather than wasting 8k
  102. for every single inactive connection_t. Free items from the
  103. 4k/16k-buffer free lists when they haven't been used for a while.
  104. o Minor features (build):
  105. - Make autoconf search for libevent, openssl, and zlib consistently.
  106. - Update deprecated macros in configure.in.
  107. - When warning about missing headers, tell the user to let us
  108. know if the compile succeeds anyway, so we can downgrade the
  109. warning.
  110. - Include the current subversion revision as part of the version
  111. string: either fetch it directly if we're in an SVN checkout, do
  112. some magic to guess it if we're in an SVK checkout, or use
  113. the last-detected version if we're building from a .tar.gz.
  114. Use this version consistently in log messages.
  115. o Minor features (logging):
  116. - Always prepend "Bug: " to any log message about a bug.
  117. - Put a platform string (e.g. "Linux i686") in the startup log
  118. message, so when people paste just their logs, we know if it's
  119. OpenBSD or Windows or what.
  120. - When logging memory usage, break down memory used in buffers by
  121. buffer type.
  122. o Minor features (directory system):
  123. - New config option V2AuthoritativeDirectory that all directory
  124. authorities should set. This will let future authorities choose
  125. not to serve V2 directory information.
  126. - Directory authorities allow multiple router descriptors and/or extra
  127. info documents to be uploaded in a single go. This will make
  128. implementing proposal 104 simpler.
  129. o Minor features (controller):
  130. - Add a new config option __DisablePredictedCircuits designed for
  131. use by the controller, when we don't want Tor to build any circuits
  132. preemptively.
  133. - Let the controller specify HOP=%d as an argument to ATTACHSTREAM,
  134. so we can exit from the middle of the circuit.
  135. - Implement "getinfo status/circuit-established".
  136. - Implement "getinfo status/version/..." so a controller can tell
  137. whether the current version is recommended, and whether any versions
  138. are good, and how many authorities agree. (Patch from shibz.)
  139. o Minor features (hidden services):
  140. - Allow multiple HiddenServicePort directives with the same virtual
  141. port; when they occur, the user is sent round-robin to one
  142. of the target ports chosen at random. Partially fixes bug 393 by
  143. adding limited ad-hoc round-robining.
  144. o Minor features (other):
  145. - More unit tests.
  146. - Add a new AutomapHostsOnResolve option: when it is enabled, any
  147. resolve request for hosts matching a given pattern causes Tor to
  148. generate an internal virtual address mapping for that host. This
  149. allows DNSPort to work sensibly with hidden service users. By
  150. default, .exit and .onion addresses are remapped; the list of
  151. patterns can be reconfigured with AutomapHostsSuffixes.
  152. - Add an "-F" option to tor-resolve to force a resolve for a .onion
  153. address. Thanks to the AutomapHostsOnResolve option, this is no
  154. longer a completely silly thing to do.
  155. - If Tor is invoked from something that isn't a shell (e.g. Vidalia),
  156. now we expand "-f ~/.tor/torrc" correctly. Suggested by Matt Edman.
  157. - Treat "2gb" when given in torrc for a bandwidth as meaning 2gb,
  158. minus 1 byte: the actual maximum declared bandwidth.
  159. o Removed features:
  160. - Removed support for the old binary "version 0" controller protocol.
  161. This has been deprecated since 0.1.1, and warnings have been issued
  162. since 0.1.2. When we encounter a v0 control message, we now send
  163. back an error and close the connection.
  164. - Remove the old "dns worker" server DNS code: it hasn't been default
  165. since 0.1.2.2-alpha, and all the servers seem to be using the new
  166. eventdns code.
  167. o Minor bugfixes (portability):
  168. - Even though Windows is equally happy with / and \ as path separators,
  169. try to use \ consistently on Windows and / consistently on Unix: it
  170. makes the log messages nicer.
  171. - Correctly report platform name on Windows 95 OSR2 and Windows 98 SE.
  172. - Read resolv.conf files correctly on platforms where read() returns
  173. partial results on small file reads.
  174. o Minor bugfixes (directory):
  175. - Correctly enforce that elements of directory objects do not appear
  176. more often than they are allowed to appear.
  177. - When we are reporting the DirServer line we just parsed, we were
  178. logging the second stanza of the key fingerprint, not the first.
  179. o Minor bugfixes (logging):
  180. - When we hit an EOF on a log (probably because we're shutting down),
  181. don't try to remove the log from the list: just mark it as
  182. unusable. (Bulletproofs against bug 222.)
  183. o Minor bugfixes (other):
  184. - In the exitlist script, only consider the most recently published
  185. server descriptor for each server. Also, when the user requests
  186. a list of servers that _reject_ connections to a given address,
  187. explicitly exclude the IPs that also have servers that accept
  188. connections to that address. (Resolves bug 405.)
  189. - Stop allowing hibernating servers to be "stable" or "fast".
  190. - On Windows, we were preventing other processes from reading
  191. cached-routers while Tor was running. (Reported by janbar)
  192. - Make the NodeFamilies config option work. (Reported by
  193. lodger -- it has never actually worked, even though we added it
  194. in Oct 2004.)
  195. - Check return values from pthread_mutex functions.
  196. - Don't save non-general-purpose router descriptors to the disk cache,
  197. because we have no way of remembering what their purpose was when
  198. we restart.
  199. - Add even more asserts to hunt down bug 417.
  200. - Build without verbose warnings even on (not-yet-released) gcc 4.2.
  201. o Minor bugfixes (controller):
  202. - Make 'getinfo fingerprint' return a 551 error if we're not a
  203. server, so we match what the control spec claims we do. Reported
  204. by daejees.
  205. - Fix a typo in an error message when extendcircuit fails that
  206. caused us to not follow the \r\n-based delimiter protocol. Reported
  207. by daejees.
  208. o Code simplifications and refactoring:
  209. - Stop passing around circuit_t and crypt_path_t pointers that are
  210. implicit in other procedure arguments.
  211. - Drop the old code to choke directory connections when the
  212. corresponding OR connections got full: thanks to the cell queue
  213. feature, OR conns don't get full any more.
  214. - Make dns_resolve() handle attaching connections to circuits
  215. properly, so the caller doesn't have to.
  216. - Rename wants_to_read and wants_to_write to read/write_blocked_on_bw.
  217. - Keep the connection array as a dynamic smartlist_t, rather than as
  218. a fixed-sized array. This is important, as the number of connections
  219. is becoming increasingly decoupled from the number of sockets.
  220. Changes in version 0.1.2.14 - 2007-05-25
  221. o Directory authority changes:
  222. - Two directory authorities (moria1 and moria2) just moved to new
  223. IP addresses. This change will particularly affect those who serve
  224. or use hidden services.
  225. o Major bugfixes (crashes):
  226. - If a directory server runs out of space in the connection table
  227. as it's processing a begin_dir request, it will free the exit stream
  228. but leave it attached to the circuit, leading to unpredictable
  229. behavior. (Reported by seeess, fixes bug 425.)
  230. - Fix a bug in dirserv_remove_invalid() that would cause authorities
  231. to corrupt memory under some really unlikely scenarios.
  232. - Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
  233. - Avoid segfaults when reading from mmaped descriptor file. (Reported
  234. by lodger.)
  235. o Major bugfixes (security):
  236. - When choosing an entry guard for a circuit, avoid using guards
  237. that are in the same family as the chosen exit -- not just guards
  238. that are exactly the chosen exit. (Reported by lodger.)
  239. o Major bugfixes (resource management):
  240. - If a directory authority is down, skip it when deciding where to get
  241. networkstatus objects or descriptors. Otherwise we keep asking
  242. every 10 seconds forever. Fixes bug 384.
  243. - Count it as a failure if we fetch a valid network-status but we
  244. don't want to keep it. Otherwise we'll keep fetching it and keep
  245. not wanting to keep it. Fixes part of bug 422.
  246. - If all of our dirservers have given us bad or no networkstatuses
  247. lately, then stop hammering them once per minute even when we
  248. think they're failed. Fixes another part of bug 422.
  249. o Minor bugfixes:
  250. - Actually set the purpose correctly for descriptors inserted with
  251. purpose=controller.
  252. - When we have k non-v2 authorities in our DirServer config,
  253. we ignored the last k authorities in the list when updating our
  254. network-statuses.
  255. - Correctly back-off from requesting router descriptors that we are
  256. having a hard time downloading.
  257. - Read resolv.conf files correctly on platforms where read() returns
  258. partial results on small file reads.
  259. - Don't rebuild the entire router store every time we get 32K of
  260. routers: rebuild it when the journal gets very large, or when
  261. the gaps in the store get very large.
  262. o Minor features:
  263. - When routers publish SVN revisions in their router descriptors,
  264. authorities now include those versions correctly in networkstatus
  265. documents.
  266. - Warn when using a version of libevent before 1.3b to run a server on
  267. OSX or BSD: these versions interact badly with userspace threads.
  268. Changes in version 0.1.2.13 - 2007-04-24
  269. o Minor fixes:
  270. - Fix a memory leak when we ask for "all" networkstatuses and we
  271. get one we don't recognize.
  272. - Add more asserts to hunt down bug 417.
  273. - Disable kqueue on OS X 10.3 and earlier, to fix bug 371.
  274. Changes in version 0.1.2.12-rc - 2007-03-16
  275. o Major bugfixes:
  276. - Fix an infinite loop introduced in 0.1.2.7-alpha when we serve
  277. directory information requested inside Tor connections (i.e. via
  278. begin_dir cells). It only triggered when the same connection was
  279. serving other data at the same time. Reported by seeess.
  280. o Minor bugfixes:
  281. - When creating a circuit via the controller, send a 'launched'
  282. event when we're done, so we follow the spec better.
  283. Changes in version 0.1.2.11-rc - 2007-03-15
  284. o Minor bugfixes (controller), reported by daejees:
  285. - Correct the control spec to match how the code actually responds
  286. to 'getinfo addr-mappings/*'.
  287. - The control spec described a GUARDS event, but the code
  288. implemented a GUARD event. Standardize on GUARD, but let people
  289. ask for GUARDS too.
  290. Changes in version 0.1.2.10-rc - 2007-03-07
  291. o Major bugfixes (Windows):
  292. - Do not load the NT services library functions (which may not exist)
  293. just to detect if we're a service trying to shut down. Now we run
  294. on Win98 and friends again.
  295. o Minor bugfixes (other):
  296. - Clarify a couple of log messages.
  297. - Fix a misleading socks5 error number.
  298. Changes in version 0.1.2.9-rc - 2007-03-02
  299. o Major bugfixes (Windows):
  300. - On MinGW, use "%I64u" to printf/scanf 64-bit integers, instead
  301. of the usual GCC "%llu". This prevents a bug when saving 64-bit
  302. int configuration values: the high-order 32 bits would get
  303. truncated. In particular, we were being bitten by the default
  304. MaxAdvertisedBandwidth of 128 TB turning into 0. (Fixes bug 400
  305. and maybe also bug 397.)
  306. o Minor bugfixes (performance):
  307. - Use OpenSSL's AES implementation on platforms where it's faster.
  308. This could save us as much as 10% CPU usage.
  309. o Minor bugfixes (server):
  310. - Do not rotate onion key immediately after setting it for the first
  311. time.
  312. o Minor bugfixes (directory authorities):
  313. - Stop calling servers that have been hibernating for a long time
  314. "stable". Also, stop letting hibernating or obsolete servers affect
  315. uptime and bandwidth cutoffs.
  316. - Stop listing hibernating servers in the v1 directory.
  317. o Minor bugfixes (hidden services):
  318. - Upload hidden service descriptors slightly less often, to reduce
  319. load on authorities.
  320. o Minor bugfixes (other):
  321. - Fix an assert that could trigger if a controller quickly set then
  322. cleared EntryNodes. (Bug found by Udo van den Heuvel.)
  323. - On architectures where sizeof(int)>4, still clamp declarable bandwidth
  324. to INT32_MAX.
  325. - Fix a potential race condition in the rpm installer. Found by
  326. Stefan Nordhausen.
  327. - Try to fix eventdns warnings once and for all: do not treat a dns rcode
  328. of 2 as indicating that the server is completely bad; it sometimes
  329. means that the server is just bad for the request in question. (may fix
  330. the last of bug 326.)
  331. - Disable encrypted directory connections when we don't have a server
  332. descriptor for the destination. We'll get this working again in
  333. the 0.2.0 branch.
  334. Changes in version 0.1.2.8-beta - 2007-02-26
  335. o Major bugfixes (crashes):
  336. - Stop crashing when the controller asks us to resetconf more than
  337. one config option at once. (Vidalia 0.0.11 does this.)
  338. - Fix a crash that happened on Win98 when we're given command-line
  339. arguments: don't try to load NT service functions from advapi32.dll
  340. except when we need them. (Bug introduced in 0.1.2.7-alpha;
  341. resolves bug 389.)
  342. - Fix a longstanding obscure crash bug that could occur when
  343. we run out of DNS worker processes. (Resolves bug 390.)
  344. o Major bugfixes (hidden services):
  345. - Correctly detect whether hidden service descriptor downloads are
  346. in-progress. (Suggested by Karsten Loesing; fixes bug 399.)
  347. o Major bugfixes (accounting):
  348. - When we start during an accounting interval before it's time to wake
  349. up, remember to wake up at the correct time. (May fix bug 342.)
  350. o Minor bugfixes (controller):
  351. - Give the controller END_STREAM_REASON_DESTROY events _before_ we
  352. clear the corresponding on_circuit variable, and remember later
  353. that we don't need to send a redundant CLOSED event. (Resolves part
  354. 3 of bug 367.)
  355. - Report events where a resolve succeeded or where we got a socks
  356. protocol error correctly, rather than calling both of them
  357. "INTERNAL".
  358. - Change reported stream target addresses to IP consistently when
  359. we finally get the IP from an exit node.
  360. - Send log messages to the controller even if they happen to be very
  361. long.
  362. o Minor bugfixes (other):
  363. - Display correct results when reporting which versions are
  364. recommended, and how recommended they are. (Resolves bug 383.)
  365. - Improve our estimates for directory bandwidth to be less random:
  366. guess that an unrecognized directory will have the average bandwidth
  367. from all known directories, not that it will have the average
  368. bandwidth from those directories earlier than it on the list.
  369. - If we start a server with ClientOnly 1, then set ClientOnly to 0
  370. and hup, stop triggering an assert based on an empty onion_key.
  371. - On platforms with no working mmap() equivalent, don't warn the
  372. user when cached-routers doesn't exist.
  373. - Warn the user when mmap() [or its equivalent] fails for some reason
  374. other than file-not-found.
  375. - Don't warn the user when cached-routers.new doesn't exist: that's
  376. perfectly fine when starting up for the first time.
  377. - When EntryNodes are configured, rebuild the guard list to contain,
  378. in order: the EntryNodes that were guards before; the rest of the
  379. EntryNodes; the nodes that were guards before.
  380. - Mask out all signals in sub-threads; only the libevent signal
  381. handler should be processing them. This should prevent some crashes
  382. on some machines using pthreads. (Patch from coderman.)
  383. - Fix switched arguments on memset in the implementation of
  384. tor_munmap() for systems with no mmap() call.
  385. - When Tor receives a router descriptor that it asked for, but
  386. no longer wants (because it has received fresh networkstatuses
  387. in the meantime), do not warn the user. Cache the descriptor if
  388. we're a cache; drop it if we aren't.
  389. - Make earlier entry guards _really_ get retried when the network
  390. comes back online.
  391. - On a malformed DNS reply, always give an error to the corresponding
  392. DNS request.
  393. - Build with recent libevents on platforms that do not define the
  394. nonstandard types "u_int8_t" and friends.
  395. o Minor features (controller):
  396. - Warn the user when an application uses the obsolete binary v0
  397. control protocol. We're planning to remove support for it during
  398. the next development series, so it's good to give people some
  399. advance warning.
  400. - Add STREAM_BW events to report per-entry-stream bandwidth
  401. use. (Patch from Robert Hogan.)
  402. - Rate-limit SIGNEWNYM signals in response to controllers that
  403. impolitely generate them for every single stream. (Patch from
  404. mwenge; closes bug 394.)
  405. - Make REMAP stream events have a SOURCE (cache or exit), and
  406. make them generated in every case where we get a successful
  407. connected or resolved cell.
  408. o Minor bugfixes (performance):
  409. - Call router_have_min_dir_info half as often. (This is showing up in
  410. some profiles, but not others.)
  411. - When using GCC, make log_debug never get called at all, and its
  412. arguments never get evaluated, when no debug logs are configured.
  413. (This is showing up in some profiles, but not others.)
  414. o Minor features:
  415. - Remove some never-implemented options. Mark PathlenCoinWeight as
  416. obsolete.
  417. - Implement proposal 106: Stop requiring clients to have well-formed
  418. certificates; stop checking nicknames in certificates. (Clients
  419. have certificates so that they can look like Tor servers, but in
  420. the future we might want to allow them to look like regular TLS
  421. clients instead. Nicknames in certificates serve no purpose other
  422. than making our protocol easier to recognize on the wire.)
  423. - Revise messages on handshake failure again to be even more clear about
  424. which are incoming connections and which are outgoing.
  425. - Discard any v1 directory info that's over 1 month old (for
  426. directories) or over 1 week old (for running-routers lists).
  427. - Do not warn when individual nodes in the configuration's EntryNodes,
  428. ExitNodes, etc are down: warn only when all possible nodes
  429. are down. (Fixes bug 348.)
  430. - Always remove expired routers and networkstatus docs before checking
  431. whether we have enough information to build circuits. (Fixes
  432. bug 373.)
  433. - Put a lower-bound on MaxAdvertisedBandwidth.
  434. Changes in version 0.1.2.7-alpha - 2007-02-06
  435. o Major bugfixes (rate limiting):
  436. - Servers decline directory requests much more aggressively when
  437. they're low on bandwidth. Otherwise they end up queueing more and
  438. more directory responses, which can't be good for latency.
  439. - But never refuse directory requests from local addresses.
  440. - Fix a memory leak when sending a 503 response for a networkstatus
  441. request.
  442. - Be willing to read or write on local connections (e.g. controller
  443. connections) even when the global rate limiting buckets are empty.
  444. - If our system clock jumps back in time, don't publish a negative
  445. uptime in the descriptor. Also, don't let the global rate limiting
  446. buckets go absurdly negative.
  447. - Flush local controller connection buffers periodically as we're
  448. writing to them, so we avoid queueing 4+ megabytes of data before
  449. trying to flush.
  450. o Major bugfixes (NT services):
  451. - Install as NT_AUTHORITY\LocalService rather than as SYSTEM; add a
  452. command-line flag so that admins can override the default by saying
  453. "tor --service install --user "SomeUser"". This will not affect
  454. existing installed services. Also, warn the user that the service
  455. will look for its configuration file in the service user's
  456. %appdata% directory. (We can't do the 'hardwire the user's appdata
  457. directory' trick any more, since we may not have read access to that
  458. directory.)
  459. o Major bugfixes (other):
  460. - Previously, we would cache up to 16 old networkstatus documents
  461. indefinitely, if they came from nontrusted authorities. Now we
  462. discard them if they are more than 10 days old.
  463. - Fix a crash bug in the presence of DNS hijacking (reported by Andrew
  464. Del Vecchio).
  465. - Detect and reject malformed DNS responses containing circular
  466. pointer loops.
  467. - If exits are rare enough that we're not marking exits as guards,
  468. ignore exit bandwidth when we're deciding the required bandwidth
  469. to become a guard.
  470. - When we're handling a directory connection tunneled over Tor,
  471. don't fill up internal memory buffers with all the data we want
  472. to tunnel; instead, only add it if the OR connection that will
  473. eventually receive it has some room for it. (This can lead to
  474. slowdowns in tunneled dir connections; a better solution will have
  475. to wait for 0.2.0.)
  476. o Minor bugfixes (dns):
  477. - Add some defensive programming to eventdns.c in an attempt to catch
  478. possible memory-stomping bugs.
  479. - Detect and reject DNS replies containing IPv4 or IPv6 records with
  480. an incorrect number of bytes. (Previously, we would ignore the
  481. extra bytes.)
  482. - Fix as-yet-unused reverse IPv6 lookup code so it sends nybbles
  483. in the correct order, and doesn't crash.
  484. - Free memory held in recently-completed DNS lookup attempts on exit.
  485. This was not a memory leak, but may have been hiding memory leaks.
  486. - Handle TTL values correctly on reverse DNS lookups.
  487. - Treat failure to parse resolv.conf as an error.
  488. o Minor bugfixes (other):
  489. - Fix crash with "tor --list-fingerprint" (reported by seeess).
  490. - When computing clock skew from directory HTTP headers, consider what
  491. time it was when we finished asking for the directory, not what
  492. time it is now.
  493. - Expire socks connections if they spend too long waiting for the
  494. handshake to finish. Previously we would let them sit around for
  495. days, if the connecting application didn't close them either.
  496. - And if the socks handshake hasn't started, don't send a
  497. "DNS resolve socks failed" handshake reply; just close it.
  498. - Stop using C functions that OpenBSD's linker doesn't like.
  499. - Don't launch requests for descriptors unless we have networkstatuses
  500. from at least half of the authorities. This delays the first
  501. download slightly under pathological circumstances, but can prevent
  502. us from downloading a bunch of descriptors we don't need.
  503. - Do not log IPs with TLS failures for incoming TLS
  504. connections. (Fixes bug 382.)
  505. - If the user asks to use invalid exit nodes, be willing to use
  506. unstable ones.
  507. - Stop using the reserved ac_cv namespace in our configure script.
  508. - Call stat() slightly less often; use fstat() when possible.
  509. - Refactor the way we handle pending circuits when an OR connection
  510. completes or fails, in an attempt to fix a rare crash bug.
  511. - Only rewrite a conn's address based on X-Forwarded-For: headers
  512. if it's a parseable public IP address; and stop adding extra quotes
  513. to the resulting address.
  514. o Major features:
  515. - Weight directory requests by advertised bandwidth. Now we can
  516. let servers enable write limiting but still allow most clients to
  517. succeed at their directory requests. (We still ignore weights when
  518. choosing a directory authority; I hope this is a feature.)
  519. o Minor features:
  520. - Create a new file ReleaseNotes which was the old ChangeLog. The
  521. new ChangeLog file now includes the summaries for all development
  522. versions too.
  523. - Check for addresses with invalid characters at the exit as well
  524. as at the client, and warn less verbosely when they fail. You can
  525. override this by setting ServerDNSAllowNonRFC953Addresses to 1.
  526. - Adapt a patch from goodell to let the contrib/exitlist script
  527. take arguments rather than require direct editing.
  528. - Inform the server operator when we decide not to advertise a
  529. DirPort due to AccountingMax enabled or a low BandwidthRate. It
  530. was confusing Zax, so now we're hopefully more helpful.
  531. - Bring us one step closer to being able to establish an encrypted
  532. directory tunnel without knowing a descriptor first. Still not
  533. ready yet. As part of the change, now assume we can use a
  534. create_fast cell if we don't know anything about a router.
  535. - Allow exit nodes to use nameservers running on ports other than 53.
  536. - Servers now cache reverse DNS replies.
  537. - Add an --ignore-missing-torrc command-line option so that we can
  538. get the "use sensible defaults if the configuration file doesn't
  539. exist" behavior even when specifying a torrc location on the command
  540. line.
  541. o Minor features (controller):
  542. - Track reasons for OR connection failure; make these reasons
  543. available via the controller interface. (Patch from Mike Perry.)
  544. - Add a SOCKS_BAD_HOSTNAME client status event so controllers
  545. can learn when clients are sending malformed hostnames to Tor.
  546. - Clean up documentation for controller status events.
  547. - Add a REMAP status to stream events to note that a stream's
  548. address has changed because of a cached address or a MapAddress
  549. directive.
  550. Changes in version 0.1.2.6-alpha - 2007-01-09
  551. o Major bugfixes:
  552. - Fix an assert error introduced in 0.1.2.5-alpha: if a single TLS
  553. connection handles more than 4 gigs in either direction, we crash.
  554. - Fix an assert error introduced in 0.1.2.5-alpha: if we're an
  555. advertised exit node, somebody might try to exit from us when
  556. we're bootstrapping and before we've built our descriptor yet.
  557. Refuse the connection rather than crashing.
  558. o Minor bugfixes:
  559. - Warn if we (as a server) find that we've resolved an address that we
  560. weren't planning to resolve.
  561. - Warn that using select() on any libevent version before 1.1 will be
  562. unnecessarily slow (even for select()).
  563. - Flush ERR-level controller status events just like we currently
  564. flush ERR-level log events, so that a Tor shutdown doesn't prevent
  565. the controller from learning about current events.
  566. o Minor features (more controller status events):
  567. - Implement EXTERNAL_ADDRESS server status event so controllers can
  568. learn when our address changes.
  569. - Implement BAD_SERVER_DESCRIPTOR server status event so controllers
  570. can learn when directories reject our descriptor.
  571. - Implement SOCKS_UNKNOWN_PROTOCOL client status event so controllers
  572. can learn when a client application is speaking a non-socks protocol
  573. to our SocksPort.
  574. - Implement DANGEROUS_SOCKS client status event so controllers
  575. can learn when a client application is leaking DNS addresses.
  576. - Implement BUG general status event so controllers can learn when
  577. Tor is unhappy about its internal invariants.
  578. - Implement CLOCK_SKEW general status event so controllers can learn
  579. when Tor thinks the system clock is set incorrectly.
  580. - Implement GOOD_SERVER_DESCRIPTOR and ACCEPTED_SERVER_DESCRIPTOR
  581. server status events so controllers can learn when their descriptors
  582. are accepted by a directory.
  583. - Implement CHECKING_REACHABILITY and REACHABILITY_{SUCCEEDED|FAILED}
  584. server status events so controllers can learn about Tor's progress in
  585. deciding whether it's reachable from the outside.
  586. - Implement BAD_LIBEVENT general status event so controllers can learn
  587. when we have a version/method combination in libevent that needs to
  588. be changed.
  589. - Implement NAMESERVER_STATUS, NAMESERVER_ALL_DOWN, DNS_HIJACKED,
  590. and DNS_USELESS server status events so controllers can learn
  591. about changes to DNS server status.
  592. o Minor features (directory):
  593. - Authorities no longer recommend exits as guards if this would shift
  594. too much load to the exit nodes.
  595. Changes in version 0.1.2.5-alpha - 2007-01-06
  596. o Major features:
  597. - Enable write limiting as well as read limiting. Now we sacrifice
  598. capacity if we're pushing out lots of directory traffic, rather
  599. than overrunning the user's intended bandwidth limits.
  600. - Include TLS overhead when counting bandwidth usage; previously, we
  601. would count only the bytes sent over TLS, but not the bytes used
  602. to send them.
  603. - Support running the Tor service with a torrc not in the same
  604. directory as tor.exe and default to using the torrc located in
  605. the %appdata%\Tor\ of the user who installed the service. Patch
  606. from Matt Edman.
  607. - Servers now check for the case when common DNS requests are going to
  608. wildcarded addresses (i.e. all getting the same answer), and change
  609. their exit policy to reject *:* if it's happening.
  610. - Implement BEGIN_DIR cells, so we can connect to the directory
  611. server via TLS to do encrypted directory requests rather than
  612. plaintext. Enable via the TunnelDirConns and PreferTunneledDirConns
  613. config options if you like.
  614. o Minor features (config and docs):
  615. - Start using the state file to store bandwidth accounting data:
  616. the bw_accounting file is now obsolete. We'll keep generating it
  617. for a while for people who are still using 0.1.2.4-alpha.
  618. - Try to batch changes to the state file so that we do as few
  619. disk writes as possible while still storing important things in
  620. a timely fashion.
  621. - The state file and the bw_accounting file get saved less often when
  622. the AvoidDiskWrites config option is set.
  623. - Make PIDFile work on Windows (untested).
  624. - Add internal descriptions for a bunch of configuration options:
  625. accessible via controller interface and in comments in saved
  626. options files.
  627. - Reject *:563 (NNTPS) in the default exit policy. We already reject
  628. NNTP by default, so this seems like a sensible addition.
  629. - Clients now reject hostnames with invalid characters. This should
  630. avoid some inadvertent info leaks. Add an option
  631. AllowNonRFC953Hostnames to disable this behavior, in case somebody
  632. is running a private network with hosts called @, !, and #.
  633. - Add a maintainer script to tell us which options are missing
  634. documentation: "make check-docs".
  635. - Add a new address-spec.txt document to describe our special-case
  636. addresses: .exit, .onion, and .noconnnect.
  637. o Minor features (DNS):
  638. - Ongoing work on eventdns infrastructure: now it has dns server
  639. and ipv6 support. One day Tor will make use of it.
  640. - Add client-side caching for reverse DNS lookups.
  641. - Add support to tor-resolve tool for reverse lookups and SOCKS5.
  642. - When we change nameservers or IP addresses, reset and re-launch
  643. our tests for DNS hijacking.
  644. o Minor features (directory):
  645. - Authorities now specify server versions in networkstatus. This adds
  646. about 2% to the size of compressed networkstatus docs, and allows
  647. clients to tell which servers support BEGIN_DIR and which don't.
  648. The implementation is forward-compatible with a proposed future
  649. protocol version scheme not tied to Tor versions.
  650. - DirServer configuration lines now have an orport= option so
  651. clients can open encrypted tunnels to the authorities without
  652. having downloaded their descriptors yet. Enabled for moria1,
  653. moria2, tor26, and lefkada now in the default configuration.
  654. - Directory servers are more willing to send a 503 "busy" if they
  655. are near their write limit, especially for v1 directory requests.
  656. Now they can use their limited bandwidth for actual Tor traffic.
  657. - Clients track responses with status 503 from dirservers. After a
  658. dirserver has given us a 503, we try not to use it until an hour has
  659. gone by, or until we have no dirservers that haven't given us a 503.
  660. - When we get a 503 from a directory, and we're not a server, we don't
  661. count the failure against the total number of failures allowed
  662. for the thing we're trying to download.
  663. - Report X-Your-Address-Is correctly from tunneled directory
  664. connections; don't report X-Your-Address-Is when it's an internal
  665. address; and never believe reported remote addresses when they're
  666. internal.
  667. - Protect against an unlikely DoS attack on directory servers.
  668. - Add a BadDirectory flag to network status docs so that authorities
  669. can (eventually) tell clients about caches they believe to be
  670. broken.
  671. o Minor features (controller):
  672. - Have GETINFO dir/status/* work on hosts with DirPort disabled.
  673. - Reimplement GETINFO so that info/names stays in sync with the
  674. actual keys.
  675. - Implement "GETINFO fingerprint".
  676. - Implement "SETEVENTS GUARD" so controllers can get updates on
  677. entry guard status as it changes.
  678. o Minor features (clean up obsolete pieces):
  679. - Remove some options that have been deprecated since at least
  680. 0.1.0.x: AccountingMaxKB, LogFile, DebugLogFile, LogLevel, and
  681. SysLog. Use AccountingMax instead of AccountingMaxKB, and use Log
  682. to set log options.
  683. - We no longer look for identity and onion keys in "identity.key" and
  684. "onion.key" -- these were replaced by secret_id_key and
  685. secret_onion_key in 0.0.8pre1.
  686. - We no longer require unrecognized directory entries to be
  687. preceded by "opt".
  688. o Major bugfixes (security):
  689. - Stop sending the HttpProxyAuthenticator string to directory
  690. servers when directory connections are tunnelled through Tor.
  691. - Clients no longer store bandwidth history in the state file.
  692. - Do not log introduction points for hidden services if SafeLogging
  693. is set.
  694. - When generating bandwidth history, round down to the nearest
  695. 1k. When storing accounting data, round up to the nearest 1k.
  696. - When we're running as a server, remember when we last rotated onion
  697. keys, so that we will rotate keys once they're a week old even if
  698. we never stay up for a week ourselves.
  699. o Major bugfixes (other):
  700. - Fix a longstanding bug in eventdns that prevented the count of
  701. timed-out resolves from ever being reset. This bug caused us to
  702. give up on a nameserver the third time it timed out, and try it
  703. 10 seconds later... and to give up on it every time it timed out
  704. after that.
  705. - Take out the '5 second' timeout from the connection retry
  706. schedule. Now the first connect attempt will wait a full 10
  707. seconds before switching to a new circuit. Perhaps this will help
  708. a lot. Based on observations from Mike Perry.
  709. - Fix a bug on the Windows implementation of tor_mmap_file() that
  710. would prevent the cached-routers file from ever loading. Reported
  711. by John Kimble.
  712. o Minor bugfixes:
  713. - Fix an assert failure when a directory authority sets
  714. AuthDirRejectUnlisted and then receives a descriptor from an
  715. unlisted router. Reported by seeess.
  716. - Avoid a double-free when parsing malformed DirServer lines.
  717. - Fix a bug when a BSD-style PF socket is first used. Patch from
  718. Fabian Keil.
  719. - Fix a bug in 0.1.2.2-alpha that prevented clients from asking
  720. to resolve an address at a given exit node even when they ask for
  721. it by name.
  722. - Servers no longer ever list themselves in their "family" line,
  723. even if configured to do so. This makes it easier to configure
  724. family lists conveniently.
  725. - When running as a server, don't fall back to 127.0.0.1 when no
  726. nameservers are configured in /etc/resolv.conf; instead, make the
  727. user fix resolv.conf or specify nameservers explicitly. (Resolves
  728. bug 363.)
  729. - Stop accepting certain malformed ports in configured exit policies.
  730. - Don't re-write the fingerprint file every restart, unless it has
  731. changed.
  732. - Stop warning when a single nameserver fails: only warn when _all_ of
  733. our nameservers have failed. Also, when we only have one nameserver,
  734. raise the threshold for deciding that the nameserver is dead.
  735. - Directory authorities now only decide that routers are reachable
  736. if their identity keys are as expected.
  737. - When the user uses bad syntax in the Log config line, stop
  738. suggesting other bad syntax as a replacement.
  739. - Correctly detect ipv6 DNS capability on OpenBSD.
  740. o Minor bugfixes (controller):
  741. - Report the circuit number correctly in STREAM CLOSED events. Bug
  742. reported by Mike Perry.
  743. - Do not report bizarre values for results of accounting GETINFOs
  744. when the last second's write or read exceeds the allotted bandwidth.
  745. - Report "unrecognized key" rather than an empty string when the
  746. controller tries to fetch a networkstatus that doesn't exist.
  747. Changes in version 0.1.1.26 - 2006-12-14
  748. o Security bugfixes:
  749. - Stop sending the HttpProxyAuthenticator string to directory
  750. servers when directory connections are tunnelled through Tor.
  751. - Clients no longer store bandwidth history in the state file.
  752. - Do not log introduction points for hidden services if SafeLogging
  753. is set.
  754. o Minor bugfixes:
  755. - Fix an assert failure when a directory authority sets
  756. AuthDirRejectUnlisted and then receives a descriptor from an
  757. unlisted router (reported by seeess).
  758. Changes in version 0.1.2.4-alpha - 2006-12-03
  759. o Major features:
  760. - Add support for using natd; this allows FreeBSDs earlier than
  761. 5.1.2 to have ipfw send connections through Tor without using
  762. SOCKS. (Patch from Zajcev Evgeny with tweaks from tup.)
  763. o Minor features:
  764. - Make all connections to addresses of the form ".noconnect"
  765. immediately get closed. This lets application/controller combos
  766. successfully test whether they're talking to the same Tor by
  767. watching for STREAM events.
  768. - Make cross.sh cross-compilation script work even when autogen.sh
  769. hasn't been run. (Patch from Michael Mohr.)
  770. - Statistics dumped by -USR2 now include a breakdown of public key
  771. operations, for profiling.
  772. o Major bugfixes:
  773. - Fix a major leak when directory authorities parse their
  774. approved-routers list, a minor memory leak when we fail to pick
  775. an exit node, and a few rare leaks on errors.
  776. - Handle TransPort connections even when the server sends data before
  777. the client sends data. Previously, the connection would just hang
  778. until the client sent data. (Patch from tup based on patch from
  779. Zajcev Evgeny.)
  780. - Avoid assert failure when our cached-routers file is empty on
  781. startup.
  782. o Minor bugfixes:
  783. - Don't log spurious warnings when we see a circuit close reason we
  784. don't recognize; it's probably just from a newer version of Tor.
  785. - Have directory authorities allow larger amounts of drift in uptime
  786. without replacing the server descriptor: previously, a server that
  787. restarted every 30 minutes could have 48 "interesting" descriptors
  788. per day.
  789. - Start linking to the Tor specification and Tor reference manual
  790. correctly in the Windows installer.
  791. - Add Vidalia to the OS X uninstaller script, so when we uninstall
  792. Tor/Privoxy we also uninstall Vidalia.
  793. - Resume building on Irix64, and fix a lot of warnings from its
  794. MIPSpro C compiler.
  795. - Don't corrupt last_guessed_ip in router_new_address_suggestion()
  796. when we're running as a client.
  797. Changes in version 0.1.1.25 - 2006-11-04
  798. o Major bugfixes:
  799. - When a client asks us to resolve (rather than connect to)
  800. an address, and we have a cached answer, give them the cached
  801. answer. Previously, we would give them no answer at all.
  802. - We were building exactly the wrong circuits when we predict
  803. hidden service requirements, meaning Tor would have to build all
  804. its circuits on demand.
  805. - If none of our live entry guards have a high uptime, but we
  806. require a guard with a high uptime, try adding a new guard before
  807. we give up on the requirement. This patch should make long-lived
  808. connections more stable on average.
  809. - When testing reachability of our DirPort, don't launch new
  810. tests when there's already one in progress -- unreachable
  811. servers were stacking up dozens of testing streams.
  812. o Security bugfixes:
  813. - When the user sends a NEWNYM signal, clear the client-side DNS
  814. cache too. Otherwise we continue to act on previous information.
  815. o Minor bugfixes:
  816. - Avoid a memory corruption bug when creating a hash table for
  817. the first time.
  818. - Avoid possibility of controller-triggered crash when misusing
  819. certain commands from a v0 controller on platforms that do not
  820. handle printf("%s",NULL) gracefully.
  821. - Avoid infinite loop on unexpected controller input.
  822. - Don't log spurious warnings when we see a circuit close reason we
  823. don't recognize; it's probably just from a newer version of Tor.
  824. - Add Vidalia to the OS X uninstaller script, so when we uninstall
  825. Tor/Privoxy we also uninstall Vidalia.
  826. Changes in version 0.1.2.3-alpha - 2006-10-29
  827. o Minor features:
  828. - Prepare for servers to publish descriptors less often: never
  829. discard a descriptor simply for being too old until either it is
  830. recommended by no authorities, or until we get a better one for
  831. the same router. Make caches consider retaining old recommended
  832. routers for even longer.
  833. - If most authorities set a BadExit flag for a server, clients
  834. don't think of it as a general-purpose exit. Clients only consider
  835. authorities that advertise themselves as listing bad exits.
  836. - Directory servers now provide 'Pragma: no-cache' and 'Expires'
  837. headers for content, so that we can work better in the presence of
  838. caching HTTP proxies.
  839. - Allow authorities to list nodes as bad exits by fingerprint or by
  840. address.
  841. o Minor features, controller:
  842. - Add a REASON field to CIRC events; for backward compatibility, this
  843. field is sent only to controllers that have enabled the extended
  844. event format. Also, add additional reason codes to explain why
  845. a given circuit has been destroyed or truncated. (Patches from
  846. Mike Perry)
  847. - Add a REMOTE_REASON field to extended CIRC events to tell the
  848. controller about why a remote OR told us to close a circuit.
  849. - Stream events also now have REASON and REMOTE_REASON fields,
  850. working much like those for circuit events.
  851. - There's now a GETINFO ns/... field so that controllers can ask Tor
  852. about the current status of a router.
  853. - A new event type "NS" to inform a controller when our opinion of
  854. a router's status has changed.
  855. - Add a GETINFO events/names and GETINFO features/names so controllers
  856. can tell which events and features are supported.
  857. - A new CLEARDNSCACHE signal to allow controllers to clear the
  858. client-side DNS cache without expiring circuits.
  859. o Security bugfixes:
  860. - When the user sends a NEWNYM signal, clear the client-side DNS
  861. cache too. Otherwise we continue to act on previous information.
  862. o Minor bugfixes:
  863. - Avoid sending junk to controllers or segfaulting when a controller
  864. uses EVENT_NEW_DESC with verbose nicknames.
  865. - Stop triggering asserts if the controller tries to extend hidden
  866. service circuits (reported by mwenge).
  867. - Avoid infinite loop on unexpected controller input.
  868. - When the controller does a "GETINFO network-status", tell it
  869. about even those routers whose descriptors are very old, and use
  870. long nicknames where appropriate.
  871. - Change NT service functions to be loaded on demand. This lets us
  872. build with MinGW without breaking Tor for Windows 98 users.
  873. - Do DirPort reachability tests less often, since a single test
  874. chews through many circuits before giving up.
  875. - In the hidden service example in torrc.sample, stop recommending
  876. esoteric and discouraged hidden service options.
  877. - When stopping an NT service, wait up to 10 sec for it to actually
  878. stop. (Patch from Matt Edman; resolves bug 295.)
  879. - Fix handling of verbose nicknames with ORCONN controller events:
  880. make them show up exactly when requested, rather than exactly when
  881. not requested.
  882. - When reporting verbose nicknames in entry_guards_getinfo(), avoid
  883. printing a duplicate "$" in the keys we send (reported by mwenge).
  884. - Correctly set maximum connection limit on Cygwin. (This time
  885. for sure!)
  886. - Try to detect Windows correctly when cross-compiling.
  887. - Detect the size of the routers file correctly even if it is
  888. corrupted (on systems without mmap) or not page-aligned (on systems
  889. with mmap). This bug was harmless.
  890. - Sometimes we didn't bother sending a RELAY_END cell when an attempt
  891. to open a stream fails; now we do in more cases. This should
  892. make clients able to find a good exit faster in some cases, since
  893. unhandleable requests will now get an error rather than timing out.
  894. - Resolve two memory leaks when rebuilding the on-disk router cache
  895. (reported by fookoowa).
  896. - Clean up minor code warnings suggested by the MIPSpro C compiler,
  897. and reported by some Centos users.
  898. - Controller signals now work on non-Unix platforms that don't define
  899. SIGUSR1 and SIGUSR2 the way we expect.
  900. - Patch from Michael Mohr to contrib/cross.sh, so it checks more
  901. values before failing, and always enables eventdns.
  902. - Libevent-1.2 exports, but does not define in its headers, strlcpy.
  903. Try to fix this in configure.in by checking for most functions
  904. before we check for libevent.
  905. Changes in version 0.1.2.2-alpha - 2006-10-07
  906. o Major features:
  907. - Make our async eventdns library on-by-default for Tor servers,
  908. and plan to deprecate the separate dnsworker threads.
  909. - Add server-side support for "reverse" DNS lookups (using PTR
  910. records so clients can determine the canonical hostname for a given
  911. IPv4 address). Only supported by servers using eventdns; servers
  912. now announce in their descriptors whether they support eventdns.
  913. - Specify and implement client-side SOCKS5 interface for reverse DNS
  914. lookups (see doc/socks-extensions.txt).
  915. - Add a BEGIN_DIR relay cell type for an easier in-protocol way to
  916. connect to directory servers through Tor. Previously, clients needed
  917. to find Tor exits to make private connections to directory servers.
  918. - Avoid choosing Exit nodes for entry or middle hops when the
  919. total bandwidth available from non-Exit nodes is much higher than
  920. the total bandwidth available from Exit nodes.
  921. - Workaround for name servers (like Earthlink's) that hijack failing
  922. DNS requests and replace the no-such-server answer with a "helpful"
  923. redirect to an advertising-driven search portal. Also work around
  924. DNS hijackers who "helpfully" decline to hijack known-invalid
  925. RFC2606 addresses. Config option "ServerDNSDetectHijacking 0"
  926. lets you turn it off.
  927. - Send out a burst of long-range padding cells once we've established
  928. that we're reachable. Spread them over 4 circuits, so hopefully
  929. a few will be fast. This exercises our bandwidth and bootstraps
  930. us into the directory more quickly.
  931. o New/improved config options:
  932. - Add new config option "ResolvConf" to let the server operator
  933. choose an alternate resolve.conf file when using eventdns.
  934. - Add an "EnforceDistinctSubnets" option to control our "exclude
  935. servers on the same /16" behavior. It's still on by default; this
  936. is mostly for people who want to operate private test networks with
  937. all the machines on the same subnet.
  938. - If one of our entry guards is on the ExcludeNodes list, or the
  939. directory authorities don't think it's a good guard, treat it as
  940. if it were unlisted: stop using it as a guard, and throw it off
  941. the guards list if it stays that way for a long time.
  942. - Allow directory authorities to be marked separately as authorities
  943. for the v1 directory protocol, the v2 directory protocol, and
  944. as hidden service directories, to make it easier to retire old
  945. authorities. V1 authorities should set "HSAuthoritativeDir 1"
  946. to continue being hidden service authorities too.
  947. - Remove 8888 as a LongLivedPort, and add 6697 (IRCS).
  948. o Minor features, controller:
  949. - Fix CIRC controller events so that controllers can learn the
  950. identity digests of non-Named servers used in circuit paths.
  951. - Let controllers ask for more useful identifiers for servers. Instead
  952. of learning identity digests for un-Named servers and nicknames
  953. for Named servers, the new identifiers include digest, nickname,
  954. and indication of Named status. Off by default; see control-spec.txt
  955. for more information.
  956. - Add a "getinfo address" controller command so it can display Tor's
  957. best guess to the user.
  958. - New controller event to alert the controller when our server
  959. descriptor has changed.
  960. - Give more meaningful errors on controller authentication failure.
  961. o Minor features, other:
  962. - When asked to resolve a hostname, don't use non-exit servers unless
  963. requested to do so. This allows servers with broken DNS to be
  964. useful to the network.
  965. - Divide eventdns log messages into warn and info messages.
  966. - Reserve the nickname "Unnamed" for routers that can't pick
  967. a hostname: any router can call itself Unnamed; directory
  968. authorities will never allocate Unnamed to any particular router;
  969. clients won't believe that any router is the canonical Unnamed.
  970. - Only include function names in log messages for info/debug messages.
  971. For notice/warn/err, the content of the message should be clear on
  972. its own, and printing the function name only confuses users.
  973. - Avoid some false positives during reachability testing: don't try
  974. to test via a server that's on the same /24 as us.
  975. - If we fail to build a circuit to an intended enclave, and it's
  976. not mandatory that we use that enclave, stop wanting it.
  977. - When eventdns is enabled, allow multithreaded builds on NetBSD and
  978. OpenBSD. (We had previously disabled threads on these platforms
  979. because they didn't have working thread-safe resolver functions.)
  980. o Major bugfixes, anonymity/security:
  981. - If a client asked for a server by name, and there's a named server
  982. in our network-status but we don't have its descriptor yet, we
  983. could return an unnamed server instead.
  984. - Fix NetBSD bug that could allow someone to force uninitialized RAM
  985. to be sent to a server's DNS resolver. This only affects NetBSD
  986. and other platforms that do not bounds-check tolower().
  987. - Reject (most) attempts to use Tor circuits with length one. (If
  988. many people start using Tor as a one-hop proxy, exit nodes become
  989. a more attractive target for compromise.)
  990. - Just because your DirPort is open doesn't mean people should be
  991. able to remotely teach you about hidden service descriptors. Now
  992. only accept rendezvous posts if you've got HSAuthoritativeDir set.
  993. o Major bugfixes, other:
  994. - Don't crash on race condition in dns.c: tor_assert(!resolve->expire)
  995. - When a client asks the server to resolve (not connect to)
  996. an address, and it has a cached answer, give them the cached answer.
  997. Previously, the server would give them no answer at all.
  998. - Allow really slow clients to not hang up five minutes into their
  999. directory downloads (suggested by Adam J. Richter).
  1000. - We were building exactly the wrong circuits when we anticipated
  1001. hidden service requirements, meaning Tor would have to build all
  1002. its circuits on demand.
  1003. - Avoid crashing when we mmap a router cache file of size 0.
  1004. - When testing reachability of our DirPort, don't launch new
  1005. tests when there's already one in progress -- unreachable
  1006. servers were stacking up dozens of testing streams.
  1007. o Minor bugfixes, correctness:
  1008. - If we're a directory mirror and we ask for "all" network status
  1009. documents, we would discard status documents from authorities
  1010. we don't recognize.
  1011. - Avoid a memory corruption bug when creating a hash table for
  1012. the first time.
  1013. - Avoid controller-triggered crash when misusing certain commands
  1014. from a v0 controller on platforms that do not handle
  1015. printf("%s",NULL) gracefully.
  1016. - Don't crash when a controller sends a third argument to an
  1017. "extendcircuit" request.
  1018. - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
  1019. response; fix error code when "getinfo dir/status/" fails.
  1020. - Avoid crash when telling controller stream-status and a stream
  1021. is detached.
  1022. - Patch from Adam Langley to fix assert() in eventdns.c.
  1023. - Fix a debug log message in eventdns to say "X resolved to Y"
  1024. instead of "X resolved to X".
  1025. - Make eventdns give strings for DNS errors, not just error numbers.
  1026. - Track unreachable entry guards correctly: don't conflate
  1027. 'unreachable by us right now' with 'listed as down by the directory
  1028. authorities'. With the old code, if a guard was unreachable by
  1029. us but listed as running, it would clog our guard list forever.
  1030. - Behave correctly in case we ever have a network with more than
  1031. 2GB/s total advertised capacity.
  1032. - Make TrackExitHosts case-insensitive, and fix the behavior of
  1033. ".suffix" TrackExitHosts items to avoid matching in the middle of
  1034. an address.
  1035. - Finally fix the openssl warnings from newer gccs that believe that
  1036. ignoring a return value is okay, but casting a return value and
  1037. then ignoring it is a sign of madness.
  1038. - Prevent the contrib/exitlist script from printing the same
  1039. result more than once.
  1040. - Patch from Steve Hildrey: Generate network status correctly on
  1041. non-versioning dirservers.
  1042. - Don't listen to the X-Your-Address-Is hint if you did the lookup
  1043. via Tor; otherwise you'll think you're the exit node's IP address.
  1044. o Minor bugfixes, performance:
  1045. - Two small performance improvements on parsing descriptors.
  1046. - Major performance improvement on inserting descriptors: change
  1047. algorithm from O(n^2) to O(n).
  1048. - Make the common memory allocation path faster on machines where
  1049. malloc(0) returns a pointer.
  1050. - Start remembering X-Your-Address-Is directory hints even if you're
  1051. a client, so you can become a server more smoothly.
  1052. - Avoid duplicate entries on MyFamily line in server descriptor.
  1053. o Packaging, features:
  1054. - Remove architecture from OS X builds. The official builds are
  1055. now universal binaries.
  1056. - The Debian package now uses --verify-config when (re)starting,
  1057. to distinguish configuration errors from other errors.
  1058. - Update RPMs to require libevent 1.1b.
  1059. o Packaging, bugfixes:
  1060. - Patches so Tor builds with MinGW on Windows.
  1061. - Patches so Tor might run on Cygwin again.
  1062. - Resume building on non-gcc compilers and ancient gcc. Resume
  1063. building with the -O0 compile flag. Resume building cleanly on
  1064. Debian woody.
  1065. - Run correctly on OS X platforms with case-sensitive filesystems.
  1066. - Correct includes for net/if.h and net/pfvar.h on OpenBSD (from Tup).
  1067. - Add autoconf checks so Tor can build on Solaris x86 again.
  1068. o Documentation
  1069. - Documented (and renamed) ServerDNSSearchDomains and
  1070. ServerDNSResolvConfFile options.
  1071. - Be clearer that the *ListenAddress directives can be repeated
  1072. multiple times.
  1073. Changes in version 0.1.1.24 - 2006-09-29
  1074. o Major bugfixes:
  1075. - Allow really slow clients to not hang up five minutes into their
  1076. directory downloads (suggested by Adam J. Richter).
  1077. - Fix major performance regression from 0.1.0.x: instead of checking
  1078. whether we have enough directory information every time we want to
  1079. do something, only check when the directory information has changed.
  1080. This should improve client CPU usage by 25-50%.
  1081. - Don't crash if, after a server has been running for a while,
  1082. it can't resolve its hostname.
  1083. o Minor bugfixes:
  1084. - Allow Tor to start when RunAsDaemon is set but no logs are set.
  1085. - Don't crash when the controller receives a third argument to an
  1086. "extendcircuit" request.
  1087. - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
  1088. response; fix error code when "getinfo dir/status/" fails.
  1089. - Fix configure.in to not produce broken configure files with
  1090. more recent versions of autoconf. Thanks to Clint for his auto*
  1091. voodoo.
  1092. - Fix security bug on NetBSD that could allow someone to force
  1093. uninitialized RAM to be sent to a server's DNS resolver. This
  1094. only affects NetBSD and other platforms that do not bounds-check
  1095. tolower().
  1096. - Warn user when using libevent 1.1a or earlier with win32 or kqueue
  1097. methods: these are known to be buggy.
  1098. - If we're a directory mirror and we ask for "all" network status
  1099. documents, we would discard status documents from authorities
  1100. we don't recognize.
  1101. Changes in version 0.1.2.1-alpha - 2006-08-27
  1102. o Major features:
  1103. - Add "eventdns" async dns library from Adam Langley, tweaked to
  1104. build on OSX and Windows. Only enabled if you pass the
  1105. --enable-eventdns argument to configure.
  1106. - Allow servers with no hostname or IP address to learn their
  1107. IP address by asking the directory authorities. This code only
  1108. kicks in when you would normally have exited with a "no address"
  1109. error. Nothing's authenticated, so use with care.
  1110. - Rather than waiting a fixed amount of time between retrying
  1111. application connections, we wait only 5 seconds for the first,
  1112. 10 seconds for the second, and 15 seconds for each retry after
  1113. that. Hopefully this will improve the expected user experience.
  1114. - Patch from Tup to add support for transparent AP connections:
  1115. this basically bundles the functionality of trans-proxy-tor
  1116. into the Tor mainline. Now hosts with compliant pf/netfilter
  1117. implementations can redirect TCP connections straight to Tor
  1118. without diverting through SOCKS. Needs docs.
  1119. - Busy directory servers save lots of memory by spooling server
  1120. descriptors, v1 directories, and v2 networkstatus docs to buffers
  1121. as needed rather than en masse. Also mmap the cached-routers
  1122. files, so we don't need to keep the whole thing in memory too.
  1123. - Automatically avoid picking more than one node from the same
  1124. /16 network when constructing a circuit.
  1125. - Revise and clean up the torrc.sample that we ship with; add
  1126. a section for BandwidthRate and BandwidthBurst.
  1127. o Minor features:
  1128. - Split circuit_t into origin_circuit_t and or_circuit_t, and
  1129. split connection_t into edge, or, dir, control, and base structs.
  1130. These will save quite a bit of memory on busy servers, and they'll
  1131. also help us track down bugs in the code and bugs in the spec.
  1132. - Experimentally re-enable kqueue on OSX when using libevent 1.1b
  1133. or later. Log when we are doing this, so we can diagnose it when
  1134. it fails. (Also, recommend libevent 1.1b for kqueue and
  1135. win32 methods; deprecate libevent 1.0b harder; make libevent
  1136. recommendation system saner.)
  1137. - Start being able to build universal binaries on OS X (thanks
  1138. to Phobos).
  1139. - Export the default exit policy via the control port, so controllers
  1140. don't need to guess what it is / will be later.
  1141. - Add a man page entry for ProtocolWarnings.
  1142. - Add TestVia config option to the man page.
  1143. - Remove even more protocol-related warnings from Tor server logs,
  1144. such as bad TLS handshakes and malformed begin cells.
  1145. - Stop fetching descriptors if you're not a dir mirror and you
  1146. haven't tried to establish any circuits lately. [This currently
  1147. causes some dangerous behavior, because when you start up again
  1148. you'll use your ancient server descriptors.]
  1149. - New DirPort behavior: if you have your dirport set, you download
  1150. descriptors aggressively like a directory mirror, whether or not
  1151. your ORPort is set.
  1152. - Get rid of the router_retry_connections notion. Now routers
  1153. no longer try to rebuild long-term connections to directory
  1154. authorities, and directory authorities no longer try to rebuild
  1155. long-term connections to all servers. We still don't hang up
  1156. connections in these two cases though -- we need to look at it
  1157. more carefully to avoid flapping, and we likely need to wait til
  1158. 0.1.1.x is obsolete.
  1159. - Drop compatibility with obsolete Tors that permit create cells
  1160. to have the wrong circ_id_type.
  1161. - Re-enable per-connection rate limiting. Get rid of the "OP
  1162. bandwidth" concept. Lay groundwork for "bandwidth classes" --
  1163. separate global buckets that apply depending on what sort of conn
  1164. it is.
  1165. - Start publishing one minute or so after we find our ORPort
  1166. to be reachable. This will help reduce the number of descriptors
  1167. we have for ourselves floating around, since it's quite likely
  1168. other things (e.g. DirPort) will change during that minute too.
  1169. - Fork the v1 directory protocol into its own spec document,
  1170. and mark dir-spec.txt as the currently correct (v2) spec.
  1171. o Major bugfixes:
  1172. - When we find our DirPort to be reachable, publish a new descriptor
  1173. so we'll tell the world (reported by pnx).
  1174. - Publish a new descriptor after we hup/reload. This is important
  1175. if our config has changed such that we'll want to start advertising
  1176. our DirPort now, etc.
  1177. - Allow Tor to start when RunAsDaemon is set but no logs are set.
  1178. - When we have a state file we cannot parse, tell the user and
  1179. move it aside. Now we avoid situations where the user starts
  1180. Tor in 1904, Tor writes a state file with that timestamp in it,
  1181. the user fixes her clock, and Tor refuses to start.
  1182. - Fix configure.in to not produce broken configure files with
  1183. more recent versions of autoconf. Thanks to Clint for his auto*
  1184. voodoo.
  1185. - "tor --verify-config" now exits with -1(255) or 0 depending on
  1186. whether the config options are bad or good.
  1187. - Resolve bug 321 when using dnsworkers: append a period to every
  1188. address we resolve at the exit node, so that we do not accidentally
  1189. pick up local addresses, and so that failing searches are retried
  1190. in the resolver search domains. (This is already solved for
  1191. eventdns.) (This breaks Blossom servers for now.)
  1192. - If we are using an exit enclave and we can't connect, e.g. because
  1193. its webserver is misconfigured to not listen on localhost, then
  1194. back off and try connecting from somewhere else before we fail.
  1195. o Minor bugfixes:
  1196. - Start compiling on MinGW on Windows (patches from Mike Chiussi).
  1197. - Start compiling on MSVC6 on Windows (patches from Frediano Ziglio).
  1198. - Fix bug 314: Tor clients issued "unsafe socks" warnings even
  1199. when the IP address is mapped through MapAddress to a hostname.
  1200. - Start passing "ipv4" hints to getaddrinfo(), so servers don't do
  1201. useless IPv6 DNS resolves.
  1202. - Patch suggested by Karsten Loesing: respond to SIGNAL command
  1203. before we execute the signal, in case the signal shuts us down.
  1204. - Clean up AllowInvalidNodes man page entry.
  1205. - Claim a commonname of Tor, rather than TOR, in TLS handshakes.
  1206. - Add more asserts to track down an assert error on a windows Tor
  1207. server with connection_add being called with socket == -1.
  1208. - Handle reporting OR_CONN_EVENT_NEW events to the controller.
  1209. - Fix misleading log messages: an entry guard that is "unlisted",
  1210. as well as not known to be "down" (because we've never heard
  1211. of it), is not therefore "up".
  1212. - Remove code to special-case "-cvs" ending, since it has not
  1213. actually mattered since 0.0.9.
  1214. - Make our socks5 handling more robust to broken socks clients:
  1215. throw out everything waiting on the buffer in between socks
  1216. handshake phases, since they can't possibly (so the theory
  1217. goes) have predicted what we plan to respond to them.
  1218. Changes in version 0.1.1.23 - 2006-07-30
  1219. o Major bugfixes:
  1220. - Fast Tor servers, especially exit nodes, were triggering asserts
  1221. due to a bug in handling the list of pending DNS resolves. Some
  1222. bugs still remain here; we're hunting them.
  1223. - Entry guards could crash clients by sending unexpected input.
  1224. - More fixes on reachability testing: if you find yourself reachable,
  1225. then don't ever make any client requests (so you stop predicting
  1226. circuits), then hup or have your clock jump, then later your IP
  1227. changes, you won't think circuits are working, so you won't try to
  1228. test reachability, so you won't publish.
  1229. o Minor bugfixes:
  1230. - Avoid a crash if the controller does a resetconf firewallports
  1231. and then a setconf fascistfirewall=1.
  1232. - Avoid an integer underflow when the dir authority decides whether
  1233. a router is stable: we might wrongly label it stable, and compute
  1234. a slightly wrong median stability, when a descriptor is published
  1235. later than now.
  1236. - Fix a place where we might trigger an assert if we can't build our
  1237. own server descriptor yet.
  1238. Changes in version 0.1.1.22 - 2006-07-05
  1239. o Major bugfixes:
  1240. - Fix a big bug that was causing servers to not find themselves
  1241. reachable if they changed IP addresses. Since only 0.1.1.22+
  1242. servers can do reachability testing correctly, now we automatically
  1243. make sure to test via one of these.
  1244. - Fix to allow clients and mirrors to learn directory info from
  1245. descriptor downloads that get cut off partway through.
  1246. - Directory authorities had a bug in deciding if a newly published
  1247. descriptor was novel enough to make everybody want a copy -- a few
  1248. servers seem to be publishing new descriptors many times a minute.
  1249. o Minor bugfixes:
  1250. - Fix a rare bug that was causing some servers to complain about
  1251. "closing wedged cpuworkers" and skip some circuit create requests.
  1252. - Make the Exit flag in directory status documents actually work.
  1253. Changes in version 0.1.1.21 - 2006-06-10
  1254. o Crash and assert fixes from 0.1.1.20:
  1255. - Fix a rare crash on Tor servers that have enabled hibernation.
  1256. - Fix a seg fault on startup for Tor networks that use only one
  1257. directory authority.
  1258. - Fix an assert from a race condition that occurs on Tor servers
  1259. while exiting, where various threads are trying to log that they're
  1260. exiting, and delete the logs, at the same time.
  1261. - Make our unit tests pass again on certain obscure platforms.
  1262. o Other fixes:
  1263. - Add support for building SUSE RPM packages.
  1264. - Speed up initial bootstrapping for clients: if we are making our
  1265. first ever connection to any entry guard, then don't mark it down
  1266. right after that.
  1267. - When only one Tor server in the network is labelled as a guard,
  1268. and we've already picked him, we would cycle endlessly picking him
  1269. again, being unhappy about it, etc. Now we specifically exclude
  1270. current guards when picking a new guard.
  1271. - Servers send create cells more reliably after the TLS connection
  1272. is established: we were sometimes forgetting to send half of them
  1273. when we had more than one pending.
  1274. - If we get a create cell that asks us to extend somewhere, but the
  1275. Tor server there doesn't match the expected digest, we now send
  1276. a destroy cell back, rather than silently doing nothing.
  1277. - Make options->RedirectExit work again.
  1278. - Make cookie authentication for the controller work again.
  1279. - Stop being picky about unusual characters in the arguments to
  1280. mapaddress. It's none of our business.
  1281. - Add a new config option "TestVia" that lets you specify preferred
  1282. middle hops to use for test circuits. Perhaps this will let me
  1283. debug the reachability problems better.
  1284. o Log / documentation fixes:
  1285. - If we're a server and some peer has a broken TLS certificate, don't
  1286. log about it unless ProtocolWarnings is set, i.e., we want to hear
  1287. about protocol violations by others.
  1288. - Fix spelling of VirtualAddrNetwork in man page.
  1289. - Add a better explanation at the top of the autogenerated torrc file
  1290. about what happened to our old torrc.
  1291. Changes in version 0.1.1.20 - 2006-05-23
  1292. o Bugfixes:
  1293. - Downgrade a log severity where servers complain that they're
  1294. invalid.
  1295. - Avoid a compile warning on FreeBSD.
  1296. - Remove string size limit on NEWDESC messages; solve bug 291.
  1297. - Correct the RunAsDaemon entry in the man page; ignore RunAsDaemon
  1298. more thoroughly when we're running on windows.
  1299. Changes in version 0.1.1.19-rc - 2006-05-03
  1300. o Minor bugs:
  1301. - Regenerate our local descriptor if it's dirty and we try to use
  1302. it locally (e.g. if it changes during reachability detection).
  1303. - If we setconf our ORPort to 0, we continued to listen on the
  1304. old ORPort and receive connections.
  1305. - Avoid a second warning about machine/limits.h on Debian
  1306. GNU/kFreeBSD.
  1307. - Be willing to add our own routerinfo into the routerlist.
  1308. Now authorities will include themselves in their directories
  1309. and network-statuses.
  1310. - Stop trying to upload rendezvous descriptors to every
  1311. directory authority: only try the v1 authorities.
  1312. - Servers no longer complain when they think they're not
  1313. registered with the directory authorities. There were too many
  1314. false positives.
  1315. - Backport dist-rpm changes so rpms can be built without errors.
  1316. o Features:
  1317. - Implement an option, VirtualAddrMask, to set which addresses
  1318. get handed out in response to mapaddress requests. This works
  1319. around a bug in tsocks where 127.0.0.0/8 is never socksified.
  1320. Changes in version 0.1.1.18-rc - 2006-04-10
  1321. o Major fixes:
  1322. - Work harder to download live network-statuses from all the
  1323. directory authorities we know about. Improve the threshold
  1324. decision logic so we're more robust to edge cases.
  1325. - When fetching rendezvous descriptors, we were willing to ask
  1326. v2 authorities too, which would always return 404.
  1327. o Minor fixes:
  1328. - Stop listing down or invalid nodes in the v1 directory. This will
  1329. reduce its bulk by about 1/3, and reduce load on directory
  1330. mirrors.
  1331. - When deciding whether a router is Fast or Guard-worthy, consider
  1332. his advertised BandwidthRate and not just the BandwidthCapacity.
  1333. - No longer ship INSTALL and README files -- they are useless now.
  1334. - Force rpmbuild to behave and honor target_cpu.
  1335. - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
  1336. - Start to include translated versions of the tor-doc-*.html
  1337. files, along with the screenshots. Still needs more work.
  1338. - Start sending back 512 and 451 errors if mapaddress fails,
  1339. rather than not sending anything back at all.
  1340. - When we fail to bind or listen on an incoming or outgoing
  1341. socket, we should close it before failing. otherwise we just
  1342. leak it. (thanks to weasel for finding.)
  1343. - Allow "getinfo dir/status/foo" to work, as long as your DirPort
  1344. is enabled. (This is a hack, and will be fixed in 0.1.2.x.)
  1345. - Make NoPublish (even though deprecated) work again.
  1346. - Fix a minor security flaw where a versioning auth dirserver
  1347. could list a recommended version many times in a row to make
  1348. clients more convinced that it's recommended.
  1349. - Fix crash bug if there are two unregistered servers running
  1350. with the same nickname, one of them is down, and you ask for
  1351. them by nickname in your EntryNodes or ExitNodes. Also, try
  1352. to pick the one that's running rather than an arbitrary one.
  1353. - Fix an infinite loop we could hit if we go offline for too long.
  1354. - Complain when we hit WSAENOBUFS on recv() or write() too.
  1355. Perhaps this will help us hunt the bug.
  1356. - If you're not a versioning dirserver, don't put the string
  1357. "client-versions \nserver-versions \n" in your network-status.
  1358. - Lower the minimum required number of file descriptors to 1000,
  1359. so we can have some overhead for Valgrind on Linux, where the
  1360. default ulimit -n is 1024.
  1361. o New features:
  1362. - Add tor.dizum.com as the fifth authoritative directory server.
  1363. - Add a new config option FetchUselessDescriptors, off by default,
  1364. for when you plan to run "exitlist" on your client and you want
  1365. to know about even the non-running descriptors.
  1366. Changes in version 0.1.1.17-rc - 2006-03-28
  1367. o Major fixes:
  1368. - Clients and servers since 0.1.1.10-alpha have been expiring
  1369. connections whenever they are idle for 5 minutes and they *do*
  1370. have circuits on them. Oops. With this new version, clients will
  1371. discard their previous entry guard choices and avoid choosing
  1372. entry guards running these flawed versions.
  1373. - Fix memory leak when uncompressing concatenated zlib streams. This
  1374. was causing substantial leaks over time on Tor servers.
  1375. - The v1 directory was including servers as much as 48 hours old,
  1376. because that's how the new routerlist->routers works. Now only
  1377. include them if they're 20 hours old or less.
  1378. o Minor fixes:
  1379. - Resume building on irix64, netbsd 2.0, etc.
  1380. - On non-gcc compilers (e.g. solaris), use "-g -O" instead of
  1381. "-Wall -g -O2".
  1382. - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
  1383. and it is confusing some users.
  1384. - Mirrors stop caching the v1 directory so often.
  1385. - Make the max number of old descriptors that a cache will hold
  1386. rise with the number of directory authorities, so we can scale.
  1387. - Change our win32 uname() hack to be more forgiving about what
  1388. win32 versions it thinks it's found.
  1389. o New features:
  1390. - Add lefkada.eecs.harvard.edu as a fourth authoritative directory
  1391. server.
  1392. - When the controller's *setconf commands fail, collect an error
  1393. message in a string and hand it back to the controller.
  1394. - Make the v2 dir's "Fast" flag based on relative capacity, just
  1395. like "Stable" is based on median uptime. Name everything in the
  1396. top 7/8 Fast, and only the top 1/2 gets to be a Guard.
  1397. - Log server fingerprint on startup, so new server operators don't
  1398. have to go hunting around their filesystem for it.
  1399. - Return a robots.txt on our dirport to discourage google indexing.
  1400. - Let the controller ask for GETINFO dir/status/foo so it can ask
  1401. directly rather than connecting to the dir port. Only works when
  1402. dirport is set for now.
  1403. o New config options rather than constants in the code:
  1404. - SocksTimeout: How long do we let a socks connection wait
  1405. unattached before we fail it?
  1406. - CircuitBuildTimeout: Cull non-open circuits that were born
  1407. at least this many seconds ago.
  1408. - CircuitIdleTimeout: Cull open clean circuits that were born
  1409. at least this many seconds ago.
  1410. Changes in version 0.1.1.16-rc - 2006-03-18
  1411. o Bugfixes on 0.1.1.15-rc:
  1412. - Fix assert when the controller asks to attachstream a connect-wait
  1413. or resolve-wait stream.
  1414. - Now do address rewriting when the controller asks us to attach
  1415. to a particular circuit too. This will let Blossom specify
  1416. "moria2.exit" without having to learn what moria2's IP address is.
  1417. - Make the "tor --verify-config" command-line work again, so people
  1418. can automatically check if their torrc will parse.
  1419. - Authoritative dirservers no longer require an open connection from
  1420. a server to consider him "reachable". We need this change because
  1421. when we add new auth dirservers, old servers won't know not to
  1422. hang up on them.
  1423. - Let Tor build on Sun CC again.
  1424. - Fix an off-by-one buffer size in dirserv.c that magically never
  1425. hit our three authorities but broke sjmurdoch's own tor network.
  1426. - If we as a directory mirror don't know of any v1 directory
  1427. authorities, then don't try to cache any v1 directories.
  1428. - Stop warning about unknown servers in our family when they are
  1429. given as hex digests.
  1430. - Stop complaining as quickly to the server operator that he
  1431. hasn't registered his nickname/key binding.
  1432. - Various cleanups so we can add new V2 Auth Dirservers.
  1433. - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
  1434. reflect the updated flags in our v2 dir protocol.
  1435. - Resume allowing non-printable characters for exit streams (both
  1436. for connecting and for resolving). Now we tolerate applications
  1437. that don't follow the RFCs. But continue to block malformed names
  1438. at the socks side.
  1439. o Bugfixes on 0.1.0.x:
  1440. - Fix assert bug in close_logs(): when we close and delete logs,
  1441. remove them all from the global "logfiles" list.
  1442. - Fix minor integer overflow in calculating when we expect to use up
  1443. our bandwidth allocation before hibernating.
  1444. - Fix a couple of bugs in OpenSSL detection. Also, deal better when
  1445. there are multiple SSLs installed with different versions.
  1446. - When we try to be a server and Address is not explicitly set and
  1447. our hostname resolves to a private IP address, try to use an
  1448. interface address if it has a public address. Now Windows machines
  1449. that think of themselves as localhost can work by default.
  1450. o New features:
  1451. - Let the controller ask for GETINFO dir/server/foo so it can ask
  1452. directly rather than connecting to the dir port.
  1453. - Let the controller tell us about certain router descriptors
  1454. that it doesn't want Tor to use in circuits. Implement
  1455. SETROUTERPURPOSE and modify +POSTDESCRIPTOR to do this.
  1456. - New config option SafeSocks to reject all application connections
  1457. using unsafe socks protocols. Defaults to off.
  1458. Changes in version 0.1.1.15-rc - 2006-03-11
  1459. o Bugfixes and cleanups:
  1460. - When we're printing strings from the network, don't try to print
  1461. non-printable characters. This protects us against shell escape
  1462. sequence exploits, and also against attacks to fool humans into
  1463. misreading their logs.
  1464. - Fix a bug where Tor would fail to establish any connections if you
  1465. left it off for 24 hours and then started it: we were happy with
  1466. the obsolete network statuses, but they all referred to router
  1467. descriptors that were too old to fetch, so we ended up with no
  1468. valid router descriptors.
  1469. - Fix a seg fault in the controller's "getinfo orconn-status"
  1470. command while listing status on incoming handshaking connections.
  1471. Introduce a status name "NEW" for these connections.
  1472. - If we get a linelist or linelist_s config option from the torrc
  1473. (e.g. ExitPolicy) and it has no value, warn and skip rather than
  1474. silently resetting it to its default.
  1475. - Don't abandon entry guards until they've been down or gone for
  1476. a whole month.
  1477. - Cleaner and quieter log messages.
  1478. o New features:
  1479. - New controller signal NEWNYM that makes new application requests
  1480. use clean circuits.
  1481. - Add a new circuit purpose 'controller' to let the controller ask
  1482. for a circuit that Tor won't try to use. Extend the EXTENDCIRCUIT
  1483. controller command to let you specify the purpose if you're
  1484. starting a new circuit. Add a new SETCIRCUITPURPOSE controller
  1485. command to let you change a circuit's purpose after it's been
  1486. created.
  1487. - Accept "private:*" in routerdesc exit policies; not generated yet
  1488. because older Tors do not understand it.
  1489. - Add BSD-style contributed startup script "rc.subr" from Peter
  1490. Thoenen.
  1491. Changes in version 0.1.1.14-alpha - 2006-02-20
  1492. o Bugfixes on 0.1.1.x:
  1493. - Don't die if we ask for a stdout or stderr log (even implicitly)
  1494. and we're set to RunAsDaemon -- just warn.
  1495. - We still had a few bugs in the OR connection rotation code that
  1496. caused directory servers to slowly aggregate connections to other
  1497. fast Tor servers. This time for sure!
  1498. - Make log entries on Win32 include the name of the function again.
  1499. - We were treating a pair of exit policies if they were equal even
  1500. if one said accept and the other said reject -- causing us to
  1501. not always publish a new descriptor since we thought nothing
  1502. had changed.
  1503. - Retry pending server downloads as well as pending networkstatus
  1504. downloads when we unexpectedly get a socks request.
  1505. - We were ignoring the IS_FAST flag in the directory status,
  1506. meaning we were willing to pick trivial-bandwidth nodes for "fast"
  1507. connections.
  1508. - If the controller's SAVECONF command fails (e.g. due to file
  1509. permissions), let the controller know that it failed.
  1510. o Features:
  1511. - If we're trying to be a Tor server and running Windows 95/98/ME
  1512. as a server, explain that we'll likely crash.
  1513. - When we're a server, a client asks for an old-style directory,
  1514. and our write bucket is empty, don't give it to him. This way
  1515. small servers can continue to serve the directory *sometimes*,
  1516. without getting overloaded.
  1517. - Compress exit policies even more -- look for duplicate lines
  1518. and remove them.
  1519. - Clients now honor the "guard" flag in the router status when
  1520. picking entry guards, rather than looking at is_fast or is_stable.
  1521. - Retain unrecognized lines in $DATADIR/state file, so that we can
  1522. be forward-compatible.
  1523. - Generate 18.0.0.0/8 address policy format in descs when we can;
  1524. warn when the mask is not reducible to a bit-prefix.
  1525. - Let the user set ControlListenAddress in the torrc. This can be
  1526. dangerous, but there are some cases (like a secured LAN) where it
  1527. makes sense.
  1528. - Split ReachableAddresses into ReachableDirAddresses and
  1529. ReachableORAddresses, so we can restrict Dir conns to port 80
  1530. and OR conns to port 443.
  1531. - Now we can target arch and OS in rpm builds (contributed by
  1532. Phobos). Also make the resulting dist-rpm filename match the
  1533. target arch.
  1534. - New config options to help controllers: FetchServerDescriptors
  1535. and FetchHidServDescriptors for whether to fetch server
  1536. info and hidserv info or let the controller do it, and
  1537. PublishServerDescriptor and PublishHidServDescriptors.
  1538. - Also let the controller set the __AllDirActionsPrivate config
  1539. option if you want all directory fetches/publishes to happen via
  1540. Tor (it assumes your controller bootstraps your circuits).
  1541. Changes in version 0.1.0.17 - 2006-02-17
  1542. o Crash bugfixes on 0.1.0.x:
  1543. - When servers with a non-zero DirPort came out of hibernation,
  1544. sometimes they would trigger an assert.
  1545. o Other important bugfixes:
  1546. - On platforms that don't have getrlimit (like Windows), we were
  1547. artificially constraining ourselves to a max of 1024
  1548. connections. Now just assume that we can handle as many as 15000
  1549. connections. Hopefully this won't cause other problems.
  1550. o Backported features:
  1551. - When we're a server, a client asks for an old-style directory,
  1552. and our write bucket is empty, don't give it to him. This way
  1553. small servers can continue to serve the directory *sometimes*,
  1554. without getting overloaded.
  1555. - Whenever you get a 503 in response to a directory fetch, try
  1556. once more. This will become important once servers start sending
  1557. 503's whenever they feel busy.
  1558. - Fetch a new directory every 120 minutes, not every 40 minutes.
  1559. Now that we have hundreds of thousands of users running the old
  1560. directory algorithm, it's starting to hurt a lot.
  1561. - Bump up the period for forcing a hidden service descriptor upload
  1562. from 20 minutes to 1 hour.
  1563. Changes in version 0.1.1.13-alpha - 2006-02-09
  1564. o Crashes in 0.1.1.x:
  1565. - When you tried to setconf ORPort via the controller, Tor would
  1566. crash. So people using TorCP to become a server were sad.
  1567. - Solve (I hope) the stack-smashing bug that we were seeing on fast
  1568. servers. The problem appears to be something do with OpenSSL's
  1569. random number generation, or how we call it, or something. Let me
  1570. know if the crashes continue.
  1571. - Turn crypto hardware acceleration off by default, until we find
  1572. somebody smart who can test it for us. (It appears to produce
  1573. seg faults in at least some cases.)
  1574. - Fix a rare assert error when we've tried all intro points for
  1575. a hidden service and we try fetching the service descriptor again:
  1576. "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed"
  1577. o Major fixes:
  1578. - Fix a major load balance bug: we were round-robining in 16 KB
  1579. chunks, and servers with bandwidthrate of 20 KB, while downloading
  1580. a 600 KB directory, would starve their other connections. Now we
  1581. try to be a bit more fair.
  1582. - Dir authorities and mirrors were never expiring the newest
  1583. descriptor for each server, causing memory and directory bloat.
  1584. - Fix memory-bloating and connection-bloating bug on servers: We
  1585. were never closing any connection that had ever had a circuit on
  1586. it, because we were checking conn->n_circuits == 0, yet we had a
  1587. bug that let it go negative.
  1588. - Make Tor work using squid as your http proxy again -- squid
  1589. returns an error if you ask for a URL that's too long, and it uses
  1590. a really generic error message. Plus, many people are behind a
  1591. transparent squid so they don't even realize it.
  1592. - On platforms that don't have getrlimit (like Windows), we were
  1593. artificially constraining ourselves to a max of 1024
  1594. connections. Now just assume that we can handle as many as 15000
  1595. connections. Hopefully this won't cause other problems.
  1596. - Add a new config option ExitPolicyRejectPrivate which defaults to
  1597. 1. This means all exit policies will begin with rejecting private
  1598. addresses, unless the server operator explicitly turns it off.
  1599. o Major features:
  1600. - Clients not longer download descriptors for non-running
  1601. descriptors.
  1602. - Before we add new directory authorities, we should make it
  1603. clear that only v1 authorities should receive/publish hidden
  1604. service descriptors.
  1605. o Minor features:
  1606. - As soon as we've fetched some more directory info, immediately
  1607. try to download more server descriptors. This way we don't have
  1608. a 10 second pause during initial bootstrapping.
  1609. - Remove even more loud log messages that the server operator can't
  1610. do anything about.
  1611. - When we're running an obsolete or un-recommended version, make
  1612. the log message more clear about what the problem is and what
  1613. versions *are* still recommended.
  1614. - Provide a more useful warn message when our onion queue gets full:
  1615. the CPU is too slow or the exit policy is too liberal.
  1616. - Don't warn when we receive a 503 from a dirserver/cache -- this
  1617. will pave the way for them being able to refuse if they're busy.
  1618. - When we fail to bind a listener, try to provide a more useful
  1619. log message: e.g., "Is Tor already running?"
  1620. - Adjust tor-spec to parameterize cell and key lengths. Now Ian
  1621. Goldberg can prove things about our handshake protocol more
  1622. easily.
  1623. - MaxConn has been obsolete for a while now. Document the ConnLimit
  1624. config option, which is a *minimum* number of file descriptors
  1625. that must be available else Tor refuses to start.
  1626. - Apply Matt Ghali's --with-syslog-facility patch to ./configure
  1627. if you log to syslog and want something other than LOG_DAEMON.
  1628. - Make dirservers generate a separate "guard" flag to mean,
  1629. "would make a good entry guard". Make clients parse it and vote
  1630. on it. Not used by clients yet.
  1631. - Implement --with-libevent-dir option to ./configure. Also, improve
  1632. search techniques to find libevent, and use those for openssl too.
  1633. - Bump the default bandwidthrate to 3 MB, and burst to 6 MB
  1634. - Only start testing reachability once we've established a
  1635. circuit. This will make startup on dirservers less noisy.
  1636. - Don't try to upload hidden service descriptors until we have
  1637. established a circuit.
  1638. - Fix the controller's "attachstream 0" command to treat conn like
  1639. it just connected, doing address remapping, handling .exit and
  1640. .onion idioms, and so on. Now we're more uniform in making sure
  1641. that the controller hears about new and closing connections.
  1642. Changes in version 0.1.1.12-alpha - 2006-01-11
  1643. o Bugfixes on 0.1.1.x:
  1644. - The fix to close duplicate server connections was closing all
  1645. Tor client connections if they didn't establish a circuit
  1646. quickly enough. Oops.
  1647. - Fix minor memory issue (double-free) that happened on exit.
  1648. o Bugfixes on 0.1.0.x:
  1649. - Tor didn't warn when it failed to open a log file.
  1650. Changes in version 0.1.1.11-alpha - 2006-01-10
  1651. o Crashes in 0.1.1.x:
  1652. - Include all the assert/crash fixes from 0.1.0.16.
  1653. - If you start Tor and then quit very quickly, there were some
  1654. races that tried to free things that weren't allocated yet.
  1655. - Fix a rare memory stomp if you're running hidden services.
  1656. - Fix segfault when specifying DirServer in config without nickname.
  1657. - Fix a seg fault when you finish connecting to a server but at
  1658. that moment you dump his server descriptor.
  1659. - Extendcircuit and Attachstream controller commands would
  1660. assert/crash if you don't give them enough arguments.
  1661. - Fix an assert error when we're out of space in the connection_list
  1662. and we try to post a hidden service descriptor (reported by weasel).
  1663. - If you specify a relative torrc path and you set RunAsDaemon in
  1664. your torrc, then it chdir()'s to the new directory. If you HUP,
  1665. it tries to load the new torrc location, fails, and exits.
  1666. The fix: no longer allow a relative path to torrc using -f.
  1667. o Major features:
  1668. - Implement "entry guards": automatically choose a handful of entry
  1669. nodes and stick with them for all circuits. Only pick new guards
  1670. when the ones you have are unsuitable, and if the old guards
  1671. become suitable again, switch back. This will increase security
  1672. dramatically against certain end-point attacks. The EntryNodes
  1673. config option now provides some hints about which entry guards you
  1674. want to use most; and StrictEntryNodes means to only use those.
  1675. - New directory logic: download by descriptor digest, not by
  1676. fingerprint. Caches try to download all listed digests from
  1677. authorities; clients try to download "best" digests from caches.
  1678. This avoids partitioning and isolating attacks better.
  1679. - Make the "stable" router flag in network-status be the median of
  1680. the uptimes of running valid servers, and make clients pay
  1681. attention to the network-status flags. Thus the cutoff adapts
  1682. to the stability of the network as a whole, making IRC, IM, etc
  1683. connections more reliable.
  1684. o Major fixes:
  1685. - Tor servers with dynamic IP addresses were needing to wait 18
  1686. hours before they could start doing reachability testing using
  1687. the new IP address and ports. This is because they were using
  1688. the internal descriptor to learn what to test, yet they were only
  1689. rebuilding the descriptor once they decided they were reachable.
  1690. - Tor 0.1.1.9 and 0.1.1.10 had a serious bug that caused clients
  1691. to download certain server descriptors, throw them away, and then
  1692. fetch them again after 30 minutes. Now mirrors throw away these
  1693. server descriptors so clients can't get them.
  1694. - We were leaving duplicate connections to other ORs open for a week,
  1695. rather than closing them once we detect a duplicate. This only
  1696. really affected authdirservers, but it affected them a lot.
  1697. - Spread the authdirservers' reachability testing over the entire
  1698. testing interval, so we don't try to do 500 TLS's at once every
  1699. 20 minutes.
  1700. o Minor fixes:
  1701. - If the network is down, and we try to connect to a conn because
  1702. we have a circuit in mind, and we timeout (30 seconds) because the
  1703. network never answers, we were expiring the circuit, but we weren't
  1704. obsoleting the connection or telling the entry_guards functions.
  1705. - Some Tor servers process billions of cells per day. These statistics
  1706. need to be uint64_t's.
  1707. - Check for integer overflows in more places, when adding elements
  1708. to smartlists. This could possibly prevent a buffer overflow
  1709. on malicious huge inputs. I don't see any, but I haven't looked
  1710. carefully.
  1711. - ReachableAddresses kept growing new "reject *:*" lines on every
  1712. setconf/reload.
  1713. - When you "setconf log" via the controller, it should remove all
  1714. logs. We were automatically adding back in a "log notice stdout".
  1715. - Newly bootstrapped Tor networks couldn't establish hidden service
  1716. circuits until they had nodes with high uptime. Be more tolerant.
  1717. - We were marking servers down when they could not answer every piece
  1718. of the directory request we sent them. This was far too harsh.
  1719. - Fix the torify (tsocks) config file to not use Tor for localhost
  1720. connections.
  1721. - Directory authorities now go to the proper authority when asking for
  1722. a networkstatus, even when they want a compressed one.
  1723. - Fix a harmless bug that was causing Tor servers to log
  1724. "Got an end because of misc error, but we're not an AP. Closing."
  1725. - Authorities were treating their own descriptor changes as cosmetic,
  1726. meaning the descriptor available in the network-status and the
  1727. descriptor that clients downloaded were different.
  1728. - The OS X installer was adding a symlink for tor_resolve but
  1729. the binary was called tor-resolve (reported by Thomas Hardly).
  1730. - Workaround a problem with some http proxies where they refuse GET
  1731. requests that specify "Content-Length: 0" (reported by Adrian).
  1732. - Fix wrong log message when you add a "HiddenServiceNodes" config
  1733. line without any HiddenServiceDir line (reported by Chris Thomas).
  1734. o Minor features:
  1735. - Write the TorVersion into the state file so we have a prayer of
  1736. keeping forward and backward compatibility.
  1737. - Revive the FascistFirewall config option rather than eliminating it:
  1738. now it's a synonym for ReachableAddresses *:80,*:443.
  1739. - Clients choose directory servers from the network status lists,
  1740. not from their internal list of router descriptors. Now they can
  1741. go to caches directly rather than needing to go to authorities
  1742. to bootstrap.
  1743. - Directory authorities ignore router descriptors that have only
  1744. cosmetic differences: do this for 0.1.0.x servers now too.
  1745. - Add a new flag to network-status indicating whether the server
  1746. can answer v2 directory requests too.
  1747. - Authdirs now stop whining so loudly about bad descriptors that
  1748. they fetch from other dirservers. So when there's a log complaint,
  1749. it's for sure from a freshly uploaded descriptor.
  1750. - Reduce memory requirements in our structs by changing the order
  1751. of fields.
  1752. - There used to be two ways to specify your listening ports in a
  1753. server descriptor: on the "router" line and with a separate "ports"
  1754. line. Remove support for the "ports" line.
  1755. - New config option "AuthDirRejectUnlisted" for auth dirservers as
  1756. a panic button: if we get flooded with unusable servers we can
  1757. revert to only listing servers in the approved-routers file.
  1758. - Auth dir servers can now mark a fingerprint as "!reject" or
  1759. "!invalid" in the approved-routers file (as its nickname), to
  1760. refuse descriptors outright or include them but marked as invalid.
  1761. - Servers store bandwidth history across restarts/crashes.
  1762. - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
  1763. get a better idea of why their circuits failed. Not used yet.
  1764. - Directory mirrors now cache up to 16 unrecognized network-status
  1765. docs. Now we can add new authdirservers and they'll be cached too.
  1766. - When picking a random directory, prefer non-authorities if any
  1767. are known.
  1768. - New controller option "getinfo desc/all-recent" to fetch the
  1769. latest server descriptor for every router that Tor knows about.
  1770. Changes in version 0.1.0.16 - 2006-01-02
  1771. o Crash bugfixes on 0.1.0.x:
  1772. - On Windows, build with a libevent patch from "I-M Weasel" to avoid
  1773. corrupting the heap, losing FDs, or crashing when we need to resize
  1774. the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
  1775. - It turns out sparc64 platforms crash on unaligned memory access
  1776. too -- so detect and avoid this.
  1777. - Handle truncated compressed data correctly (by detecting it and
  1778. giving an error).
  1779. - Fix possible-but-unlikely free(NULL) in control.c.
  1780. - When we were closing connections, there was a rare case that
  1781. stomped on memory, triggering seg faults and asserts.
  1782. - Avoid potential infinite recursion when building a descriptor. (We
  1783. don't know that it ever happened, but better to fix it anyway.)
  1784. - We were neglecting to unlink marked circuits from soon-to-close OR
  1785. connections, which caused some rare scribbling on freed memory.
  1786. - Fix a memory stomping race bug when closing the joining point of two
  1787. rendezvous circuits.
  1788. - Fix an assert in time parsing found by Steven Murdoch.
  1789. o Other bugfixes on 0.1.0.x:
  1790. - When we're doing reachability testing, provide more useful log
  1791. messages so the operator knows what to expect.
  1792. - Do not check whether DirPort is reachable when we are suppressing
  1793. advertising it because of hibernation.
  1794. - When building with -static or on Solaris, we sometimes needed -ldl.
  1795. - When we're deciding whether a stream has enough circuits around
  1796. that can handle it, count the freshly dirty ones and not the ones
  1797. that are so dirty they won't be able to handle it.
  1798. - When we're expiring old circuits, we had a logic error that caused
  1799. us to close new rendezvous circuits rather than old ones.
  1800. - Give a more helpful log message when you try to change ORPort via
  1801. the controller: you should upgrade Tor if you want that to work.
  1802. - We were failing to parse Tor versions that start with "Tor ".
  1803. - Tolerate faulty streams better: when a stream fails for reason
  1804. exitpolicy, stop assuming that the router is lying about his exit
  1805. policy. When a stream fails for reason misc, allow it to retry just
  1806. as if it was resolvefailed. When a stream has failed three times,
  1807. reset its failure count so we can try again and get all three tries.
  1808. Changes in version 0.1.1.10-alpha - 2005-12-11
  1809. o Correctness bugfixes on 0.1.0.x:
  1810. - On Windows, build with a libevent patch from "I-M Weasel" to avoid
  1811. corrupting the heap, losing FDs, or crashing when we need to resize
  1812. the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
  1813. - Stop doing the complex voodoo overkill checking for insecure
  1814. Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
  1815. - When we were closing connections, there was a rare case that
  1816. stomped on memory, triggering seg faults and asserts.
  1817. - We were neglecting to unlink marked circuits from soon-to-close OR
  1818. connections, which caused some rare scribbling on freed memory.
  1819. - When we're deciding whether a stream has enough circuits around
  1820. that can handle it, count the freshly dirty ones and not the ones
  1821. that are so dirty they won't be able to handle it.
  1822. - Recover better from TCP connections to Tor servers that are
  1823. broken but don't tell you (it happens!); and rotate TLS
  1824. connections once a week.
  1825. - When we're expiring old circuits, we had a logic error that caused
  1826. us to close new rendezvous circuits rather than old ones.
  1827. - Fix a scary-looking but apparently harmless bug where circuits
  1828. would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
  1829. servers, and never switch to state CIRCUIT_STATE_OPEN.
  1830. - When building with -static or on Solaris, we sometimes needed to
  1831. build with -ldl.
  1832. - Give a useful message when people run Tor as the wrong user,
  1833. rather than telling them to start chowning random directories.
  1834. - We were failing to inform the controller about new .onion streams.
  1835. o Security bugfixes on 0.1.0.x:
  1836. - Refuse server descriptors if the fingerprint line doesn't match
  1837. the included identity key. Tor doesn't care, but other apps (and
  1838. humans) might actually be trusting the fingerprint line.
  1839. - We used to kill the circuit when we receive a relay command we
  1840. don't recognize. Now we just drop it.
  1841. - Start obeying our firewall options more rigorously:
  1842. . If we can't get to a dirserver directly, try going via Tor.
  1843. . Don't ever try to connect (as a client) to a place our
  1844. firewall options forbid.
  1845. . If we specify a proxy and also firewall options, obey the
  1846. firewall options even when we're using the proxy: some proxies
  1847. can only proxy to certain destinations.
  1848. - Fix a bug found by Lasse Overlier: when we were making internal
  1849. circuits (intended to be cannibalized later for rendezvous and
  1850. introduction circuits), we were picking them so that they had
  1851. useful exit nodes. There was no need for this, and it actually
  1852. aids some statistical attacks.
  1853. - Start treating internal circuits and exit circuits separately.
  1854. It's important to keep them separate because internal circuits
  1855. have their last hops picked like middle hops, rather than like
  1856. exit hops. So exiting on them will break the user's expectations.
  1857. o Bugfixes on 0.1.1.x:
  1858. - Take out the mis-feature where we tried to detect IP address
  1859. flapping for people with DynDNS, and chose not to upload a new
  1860. server descriptor sometimes.
  1861. - Try to be compatible with OpenSSL 0.9.6 again.
  1862. - Log fix: when the controller is logging about .onion addresses,
  1863. sometimes it didn't include the ".onion" part of the address.
  1864. - Don't try to modify options->DirServers internally -- if the
  1865. user didn't specify any, just add the default ones directly to
  1866. the trusted dirserver list. This fixes a bug where people running
  1867. controllers would use SETCONF on some totally unrelated config
  1868. option, and Tor would start yelling at them about changing their
  1869. DirServer lines.
  1870. - Let the controller's redirectstream command specify a port, in
  1871. case the controller wants to change that too.
  1872. - When we requested a pile of server descriptors, we sometimes
  1873. accidentally launched a duplicate request for the first one.
  1874. - Bugfix for trackhostexits: write down the fingerprint of the
  1875. chosen exit, not its nickname, because the chosen exit might not
  1876. be verified.
  1877. - When parsing foo.exit, if foo is unknown, and we are leaving
  1878. circuits unattached, set the chosen_exit field and leave the
  1879. address empty. This matters because controllers got confused
  1880. otherwise.
  1881. - Directory authorities no longer try to download server
  1882. descriptors that they know they will reject.
  1883. o Features and updates:
  1884. - Replace balanced trees with hash tables: this should make stuff
  1885. significantly faster.
  1886. - Resume using the AES counter-mode implementation that we ship,
  1887. rather than OpenSSL's. Ours is significantly faster.
  1888. - Many other CPU and memory improvements.
  1889. - Add a new config option FastFirstHopPK (on by default) so clients
  1890. do a trivial crypto handshake for their first hop, since TLS has
  1891. already taken care of confidentiality and authentication.
  1892. - Add a new config option TestSocks so people can see if their
  1893. applications are using socks4, socks4a, socks5-with-ip, or
  1894. socks5-with-hostname. This way they don't have to keep mucking
  1895. with tcpdump and wondering if something got cached somewhere.
  1896. - Warn when listening on a public address for socks. I suspect a
  1897. lot of people are setting themselves up as open socks proxies,
  1898. and they have no idea that jerks on the Internet are using them,
  1899. since they simply proxy the traffic into the Tor network.
  1900. - Add "private:*" as an alias in configuration for policies. Now
  1901. you can simplify your exit policy rather than needing to list
  1902. every single internal or nonroutable network space.
  1903. - Add a new controller event type that allows controllers to get
  1904. all server descriptors that were uploaded to a router in its role
  1905. as authoritative dirserver.
  1906. - Start shipping socks-extensions.txt, tor-doc-unix.html,
  1907. tor-doc-server.html, and stylesheet.css in the tarball.
  1908. - Stop shipping tor-doc.html in the tarball.
  1909. Changes in version 0.1.1.9-alpha - 2005-11-15
  1910. o Usability improvements:
  1911. - Start calling it FooListenAddress rather than FooBindAddress,
  1912. since few of our users know what it means to bind an address
  1913. or port.
  1914. - Reduce clutter in server logs. We're going to try to make
  1915. them actually usable now. New config option ProtocolWarnings that
  1916. lets you hear about how _other Tors_ are breaking the protocol. Off
  1917. by default.
  1918. - Divide log messages into logging domains. Once we put some sort
  1919. of interface on this, it will let people looking at more verbose
  1920. log levels specify the topics they want to hear more about.
  1921. - Make directory servers return better http 404 error messages
  1922. instead of a generic "Servers unavailable".
  1923. - Check for even more Windows version flags when writing the platform
  1924. string in server descriptors, and note any we don't recognize.
  1925. - Clean up more of the OpenSSL memory when exiting, so we can detect
  1926. memory leaks better.
  1927. - Make directory authorities be non-versioning, non-naming by
  1928. default. Now we can add new directory servers without requiring
  1929. their operators to pay close attention.
  1930. - When logging via syslog, include the pid whenever we provide
  1931. a log entry. Suggested by Todd Fries.
  1932. o Performance improvements:
  1933. - Directory servers now silently throw away new descriptors that
  1934. haven't changed much if the timestamps are similar. We do this to
  1935. tolerate older Tor servers that upload a new descriptor every 15
  1936. minutes. (It seemed like a good idea at the time.)
  1937. - Inline bottleneck smartlist functions; use fast versions by default.
  1938. - Add a "Map from digest to void*" abstraction digestmap_t so we
  1939. can do less hex encoding/decoding. Use it in router_get_by_digest()
  1940. to resolve a performance bottleneck.
  1941. - Allow tor_gzip_uncompress to extract as much as possible from
  1942. truncated compressed data. Try to extract as many
  1943. descriptors as possible from truncated http responses (when
  1944. DIR_PURPOSE_FETCH_ROUTERDESC).
  1945. - Make circ->onionskin a pointer, not a static array. moria2 was using
  1946. 125000 circuit_t's after it had been up for a few weeks, which
  1947. translates to 20+ megs of wasted space.
  1948. - The private half of our EDH handshake keys are now chosen out
  1949. of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
  1950. o Security improvements:
  1951. - Start making directory caches retain old routerinfos, so soon
  1952. clients can start asking by digest of descriptor rather than by
  1953. fingerprint of server.
  1954. - Add half our entropy from RAND_poll in OpenSSL. This knows how
  1955. to use egd (if present), openbsd weirdness (if present), vms/os2
  1956. weirdness (if we ever port there), and more in the future.
  1957. o Bugfixes on 0.1.0.x:
  1958. - Do round-robin writes of at most 16 kB per write. This might be
  1959. more fair on loaded Tor servers, and it might resolve our Windows
  1960. crash bug. It might also slow things down.
  1961. - Our TLS handshakes were generating a single public/private
  1962. keypair for the TLS context, rather than making a new one for
  1963. each new connections. Oops. (But we were still rotating them
  1964. periodically, so it's not so bad.)
  1965. - When we were cannibalizing a circuit with a particular exit
  1966. node in mind, we weren't checking to see if that exit node was
  1967. already present earlier in the circuit. Oops.
  1968. - When a Tor server's IP changes (e.g. from a dyndns address),
  1969. upload a new descriptor so clients will learn too.
  1970. - Really busy servers were keeping enough circuits open on stable
  1971. connections that they were wrapping around the circuit_id
  1972. space. (It's only two bytes.) This exposed a bug where we would
  1973. feel free to reuse a circuit_id even if it still exists but has
  1974. been marked for close. Try to fix this bug. Some bug remains.
  1975. - If we would close a stream early (e.g. it asks for a .exit that
  1976. we know would refuse it) but the LeaveStreamsUnattached config
  1977. option is set by the controller, then don't close it.
  1978. o Bugfixes on 0.1.1.8-alpha:
  1979. - Fix a big pile of memory leaks, some of them serious.
  1980. - Do not try to download a routerdesc if we would immediately reject
  1981. it as obsolete.
  1982. - Resume inserting a newline between all router descriptors when
  1983. generating (old style) signed directories, since our spec says
  1984. we do.
  1985. - When providing content-type application/octet-stream for
  1986. server descriptors using .z, we were leaving out the
  1987. content-encoding header. Oops. (Everything tolerated this just
  1988. fine, but that doesn't mean we need to be part of the problem.)
  1989. - Fix a potential seg fault in getconf and getinfo using version 1
  1990. of the controller protocol.
  1991. - Avoid crash: do not check whether DirPort is reachable when we
  1992. are suppressing it because of hibernation.
  1993. - Make --hash-password not crash on exit.
  1994. Changes in version 0.1.1.8-alpha - 2005-10-07
  1995. o New features (major):
  1996. - Clients don't download or use the directory anymore. Now they
  1997. download and use network-statuses from the trusted dirservers,
  1998. and fetch individual server descriptors as needed from mirrors.
  1999. See dir-spec.txt for all the gory details.
  2000. - Be more conservative about whether to advertise our DirPort.
  2001. The main change is to not advertise if we're running at capacity
  2002. and either a) we could hibernate or b) our capacity is low and
  2003. we're using a default DirPort.
  2004. - Use OpenSSL's AES when OpenSSL has version 0.9.7 or later.
  2005. o New features (minor):
  2006. - Try to be smart about when to retry network-status and
  2007. server-descriptor fetches. Still needs some tuning.
  2008. - Stop parsing, storing, or using running-routers output (but
  2009. mirrors still cache and serve it).
  2010. - Consider a threshold of versioning dirservers (dirservers who have
  2011. an opinion about which Tor versions are still recommended) before
  2012. deciding whether to warn the user that he's obsolete.
  2013. - Dirservers can now reject/invalidate by key and IP, with the
  2014. config options "AuthDirInvalid" and "AuthDirReject". This is
  2015. useful since currently we automatically list servers as running
  2016. and usable even if we know they're jerks.
  2017. - Provide dire warnings to any users who set DirServer; move it out
  2018. of torrc.sample and into torrc.complete.
  2019. - Add MyFamily to torrc.sample in the server section.
  2020. - Add nicknames to the DirServer line, so we can refer to them
  2021. without requiring all our users to memorize their IP addresses.
  2022. - When we get an EOF or a timeout on a directory connection, note
  2023. how many bytes of serverdesc we are dropping. This will help
  2024. us determine whether it is smart to parse incomplete serverdesc
  2025. responses.
  2026. - Add a new function to "change pseudonyms" -- that is, to stop
  2027. using any currently-dirty circuits for new streams, so we don't
  2028. link new actions to old actions. Currently it's only called on
  2029. HUP (or SIGNAL RELOAD).
  2030. - On sighup, if UseHelperNodes changed to 1, use new circuits.
  2031. - Start using RAND_bytes rather than RAND_pseudo_bytes from
  2032. OpenSSL. Also, reseed our entropy every hour, not just at
  2033. startup. And entropy in 512-bit chunks, not 160-bit chunks.
  2034. o Fixes on 0.1.1.7-alpha:
  2035. - Nobody ever implemented EVENT_ADDRMAP for control protocol
  2036. version 0, so don't let version 0 controllers ask for it.
  2037. - If you requested something with too many newlines via the
  2038. v1 controller protocol, you could crash tor.
  2039. - Fix a number of memory leaks, including some pretty serious ones.
  2040. - Re-enable DirPort testing again, so Tor servers will be willing
  2041. to advertise their DirPort if it's reachable.
  2042. - On TLS handshake, only check the other router's nickname against
  2043. its expected nickname if is_named is set.
  2044. o Fixes forward-ported from 0.1.0.15:
  2045. - Don't crash when we don't have any spare file descriptors and we
  2046. try to spawn a dns or cpu worker.
  2047. - Make the numbers in read-history and write-history into uint64s,
  2048. so they don't overflow and publish negatives in the descriptor.
  2049. o Fixes on 0.1.0.x:
  2050. - For the OS X package's modified privoxy config file, comment
  2051. out the "logfile" line so we don't log everything passed
  2052. through privoxy.
  2053. - We were whining about using socks4 or socks5-with-local-lookup
  2054. even when it's an IP in the "virtual" range we designed exactly
  2055. for this case.
  2056. - We were leaking some memory every time the client changes IPs.
  2057. - Never call free() on tor_malloc()d memory. This will help us
  2058. use dmalloc to detect memory leaks.
  2059. - Check for named servers when looking them up by nickname;
  2060. warn when we'recalling a non-named server by its nickname;
  2061. don't warn twice about the same name.
  2062. - Try to list MyFamily elements by key, not by nickname, and warn
  2063. if we've not heard of the server.
  2064. - Make windows platform detection (uname equivalent) smarter.
  2065. - It turns out sparc64 doesn't like unaligned access either.
  2066. Changes in version 0.1.0.15 - 2005-09-23
  2067. o Bugfixes on 0.1.0.x:
  2068. - Reject ports 465 and 587 (spam targets) in default exit policy.
  2069. - Don't crash when we don't have any spare file descriptors and we
  2070. try to spawn a dns or cpu worker.
  2071. - Get rid of IgnoreVersion undocumented config option, and make us
  2072. only warn, never exit, when we're running an obsolete version.
  2073. - Don't try to print a null string when your server finds itself to
  2074. be unreachable and the Address config option is empty.
  2075. - Make the numbers in read-history and write-history into uint64s,
  2076. so they don't overflow and publish negatives in the descriptor.
  2077. - Fix a minor memory leak in smartlist_string_remove().
  2078. - We were only allowing ourselves to upload a server descriptor at
  2079. most every 20 minutes, even if it changed earlier than that.
  2080. - Clean up log entries that pointed to old URLs.
  2081. Changes in version 0.1.1.7-alpha - 2005-09-14
  2082. o Fixes on 0.1.1.6-alpha:
  2083. - Exit servers were crashing when people asked them to make a
  2084. connection to an address not in their exit policy.
  2085. - Looking up a non-existent stream for a v1 control connection would
  2086. cause a segfault.
  2087. - Fix a seg fault if we ask a dirserver for a descriptor by
  2088. fingerprint but he doesn't know about him.
  2089. - SETCONF was appending items to linelists, not clearing them.
  2090. - SETCONF SocksBindAddress killed Tor if it fails to bind. Now back
  2091. out and refuse the setconf if it would fail.
  2092. - Downgrade the dirserver log messages when whining about
  2093. unreachability.
  2094. o New features:
  2095. - Add Peter Palfrader's check-tor script to tor/contrib/
  2096. It lets you easily check whether a given server (referenced by
  2097. nickname) is reachable by you.
  2098. - Numerous changes to move towards client-side v2 directories. Not
  2099. enabled yet.
  2100. o Fixes on 0.1.0.x:
  2101. - If the user gave tor an odd number of command-line arguments,
  2102. we were silently ignoring the last one. Now we complain and fail.
  2103. [This wins the oldest-bug prize -- this bug has been present since
  2104. November 2002, as released in Tor 0.0.0.]
  2105. - Do not use unaligned memory access on alpha, mips, or mipsel.
  2106. It *works*, but is very slow, so we treat them as if it doesn't.
  2107. - Retry directory requests if we fail to get an answer we like
  2108. from a given dirserver (we were retrying before, but only if
  2109. we fail to connect).
  2110. - When writing the RecommendedVersions line, sort them first.
  2111. - When the client asked for a rendezvous port that the hidden
  2112. service didn't want to provide, we were sending an IP address
  2113. back along with the end cell. Fortunately, it was zero. But stop
  2114. that anyway.
  2115. - Correct "your server is reachable" log entries to indicate that
  2116. it was self-testing that told us so.
  2117. Changes in version 0.1.1.6-alpha - 2005-09-09
  2118. o Fixes on 0.1.1.5-alpha:
  2119. - We broke fascistfirewall in 0.1.1.5-alpha. Oops.
  2120. - Fix segfault in unit tests in 0.1.1.5-alpha. Oops.
  2121. - Fix bug with tor_memmem finding a match at the end of the string.
  2122. - Make unit tests run without segfaulting.
  2123. - Resolve some solaris x86 compile warnings.
  2124. - Handle duplicate lines in approved-routers files without warning.
  2125. - Fix bug where as soon as a server refused any requests due to his
  2126. exit policy (e.g. when we ask for localhost and he tells us that's
  2127. 127.0.0.1 and he won't do it), we decided he wasn't obeying his
  2128. exit policy using him for any exits.
  2129. - Only do openssl hardware accelerator stuff if openssl version is
  2130. at least 0.9.7.
  2131. o New controller features/fixes:
  2132. - Add a "RESETCONF" command so you can set config options like
  2133. AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
  2134. a config option in the torrc with no value, then it clears it
  2135. entirely (rather than setting it to its default).
  2136. - Add a "GETINFO config-file" to tell us where torrc is.
  2137. - Avoid sending blank lines when GETINFO replies should be empty.
  2138. - Add a QUIT command for the controller (for using it manually).
  2139. - Fix a bug in SAVECONF that was adding default dirservers and
  2140. other redundant entries to the torrc file.
  2141. o Start on the new directory design:
  2142. - Generate, publish, cache, serve new network-status format.
  2143. - Publish individual descriptors (by fingerprint, by "all", and by
  2144. "tell me yours").
  2145. - Publish client and server recommended versions separately.
  2146. - Allow tor_gzip_uncompress() to handle multiple concatenated
  2147. compressed strings. Serve compressed groups of router
  2148. descriptors. The compression logic here could be more
  2149. memory-efficient.
  2150. - Distinguish v1 authorities (all currently trusted directories)
  2151. from v2 authorities (all trusted directories).
  2152. - Change DirServers config line to note which dirs are v1 authorities.
  2153. - Add configuration option "V1AuthoritativeDirectory 1" which
  2154. moria1, moria2, and tor26 should set.
  2155. - Remove option when getting directory cache to see whether they
  2156. support running-routers; they all do now. Replace it with one
  2157. to see whether caches support v2 stuff.
  2158. o New features:
  2159. - Dirservers now do their own external reachability testing of each
  2160. Tor server, and only list them as running if they've been found to
  2161. be reachable. We also send back warnings to the server's logs if
  2162. it uploads a descriptor that we already believe is unreachable.
  2163. - Implement exit enclaves: if we know an IP address for the
  2164. destination, and there's a running Tor server at that address
  2165. which allows exit to the destination, then extend the circuit to
  2166. that exit first. This provides end-to-end encryption and end-to-end
  2167. authentication. Also, if the user wants a .exit address or enclave,
  2168. use 4 hops rather than 3, and cannibalize a general circ for it
  2169. if you can.
  2170. - Permit transitioning from ORPort=0 to ORPort!=0, and back, from the
  2171. controller. Also, rotate dns and cpu workers if the controller
  2172. changes options that will affect them; and initialize the dns
  2173. worker cache tree whether or not we start out as a server.
  2174. - Only upload a new server descriptor when options change, 18
  2175. hours have passed, uptime is reset, or bandwidth changes a lot.
  2176. - Check [X-]Forwarded-For headers in HTTP requests when generating
  2177. log messages. This lets people run dirservers (and caches) behind
  2178. Apache but still know which IP addresses are causing warnings.
  2179. o Config option changes:
  2180. - Replace (Fascist)Firewall* config options with a new
  2181. ReachableAddresses option that understands address policies.
  2182. For example, "ReachableAddresses *:80,*:443"
  2183. - Get rid of IgnoreVersion undocumented config option, and make us
  2184. only warn, never exit, when we're running an obsolete version.
  2185. - Make MonthlyAccountingStart config option truly obsolete now.
  2186. o Fixes on 0.1.0.x:
  2187. - Reject ports 465 and 587 in the default exit policy, since
  2188. people have started using them for spam too.
  2189. - It turns out we couldn't bootstrap a network since we added
  2190. reachability detection in 0.1.0.1-rc. Good thing the Tor network
  2191. has never gone down. Add an AssumeReachable config option to let
  2192. servers and dirservers bootstrap. When we're trying to build a
  2193. high-uptime or high-bandwidth circuit but there aren't enough
  2194. suitable servers, try being less picky rather than simply failing.
  2195. - Our logic to decide if the OR we connected to was the right guy
  2196. was brittle and maybe open to a mitm for unverified routers.
  2197. - We weren't cannibalizing circuits correctly for
  2198. CIRCUIT_PURPOSE_C_ESTABLISH_REND and
  2199. CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
  2200. build those from scratch. This should make hidden services faster.
  2201. - Predict required circuits better, with an eye toward making hidden
  2202. services faster on the service end.
  2203. - Retry streams if the exit node sends back a 'misc' failure. This
  2204. should result in fewer random failures. Also, after failing
  2205. from resolve failed or misc, reset the num failures, so we give
  2206. it a fair shake next time we try.
  2207. - Clean up the rendezvous warn log msgs, and downgrade some to info.
  2208. - Reduce severity on logs about dns worker spawning and culling.
  2209. - When we're shutting down and we do something like try to post a
  2210. server descriptor or rendezvous descriptor, don't complain that
  2211. we seem to be unreachable. Of course we are, we're shutting down.
  2212. - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
  2213. We don't use them yet, but maybe one day our DNS resolver will be
  2214. able to discover them.
  2215. - Make ContactInfo mandatory for authoritative directory servers.
  2216. - Require server descriptors to list IPv4 addresses -- hostnames
  2217. are no longer allowed. This also fixes some potential security
  2218. problems with people providing hostnames as their address and then
  2219. preferentially resolving them to partition users.
  2220. - Change log line for unreachability to explicitly suggest /etc/hosts
  2221. as the culprit. Also make it clearer what IP address and ports we're
  2222. testing for reachability.
  2223. - Put quotes around user-supplied strings when logging so users are
  2224. more likely to realize if they add bad characters (like quotes)
  2225. to the torrc.
  2226. - Let auth dir servers start without specifying an Address config
  2227. option.
  2228. - Make unit tests (and other invocations that aren't the real Tor)
  2229. run without launching listeners, creating subdirectories, and so on.
  2230. Changes in version 0.1.1.5-alpha - 2005-08-08
  2231. o Bugfixes included in 0.1.0.14.
  2232. o Bugfixes on 0.1.0.x:
  2233. - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
  2234. torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
  2235. it would silently using ignore the 6668.
  2236. Changes in version 0.1.0.14 - 2005-08-08
  2237. o Bugfixes on 0.1.0.x:
  2238. - Fix the other half of the bug with crypto handshakes
  2239. (CVE-2005-2643).
  2240. - Fix an assert trigger if you send a 'signal term' via the
  2241. controller when it's listening for 'event info' messages.
  2242. Changes in version 0.1.1.4-alpha - 2005-08-04
  2243. o Bugfixes included in 0.1.0.13.
  2244. o Features:
  2245. - Improve tor_gettimeofday() granularity on windows.
  2246. - Make clients regenerate their keys when their IP address changes.
  2247. - Implement some more GETINFO goodness: expose helper nodes, config
  2248. options, getinfo keys.
  2249. Changes in version 0.1.0.13 - 2005-08-04
  2250. o Bugfixes on 0.1.0.x:
  2251. - Fix a critical bug in the security of our crypto handshakes.
  2252. - Fix a size_t underflow in smartlist_join_strings2() that made
  2253. it do bad things when you hand it an empty smartlist.
  2254. - Fix Windows installer to ship Tor license (thanks to Aphex for
  2255. pointing out this oversight) and put a link to the doc directory
  2256. in the start menu.
  2257. - Explicitly set no-unaligned-access for sparc: it turns out the
  2258. new gcc's let you compile broken code, but that doesn't make it
  2259. not-broken.
  2260. Changes in version 0.1.1.3-alpha - 2005-07-23
  2261. o Bugfixes on 0.1.1.2-alpha:
  2262. - Fix a bug in handling the controller's "post descriptor"
  2263. function.
  2264. - Fix several bugs in handling the controller's "extend circuit"
  2265. function.
  2266. - Fix a bug in handling the controller's "stream status" event.
  2267. - Fix an assert failure if we have a controller listening for
  2268. circuit events and we go offline.
  2269. - Re-allow hidden service descriptors to publish 0 intro points.
  2270. - Fix a crash when generating your hidden service descriptor if
  2271. you don't have enough intro points already.
  2272. o New features on 0.1.1.2-alpha:
  2273. - New controller function "getinfo accounting", to ask how
  2274. many bytes we've used in this time period.
  2275. - Experimental support for helper nodes: a lot of the risk from
  2276. a small static adversary comes because users pick new random
  2277. nodes every time they rebuild a circuit. Now users will try to
  2278. stick to the same small set of entry nodes if they can. Not
  2279. enabled by default yet.
  2280. o Bugfixes on 0.1.0.12:
  2281. - If you're an auth dir server, always publish your dirport,
  2282. even if you haven't yet found yourself to be reachable.
  2283. - Fix a size_t underflow in smartlist_join_strings2() that made
  2284. it do bad things when you hand it an empty smartlist.
  2285. Changes in version 0.1.0.12 - 2005-07-18
  2286. o New directory servers:
  2287. - tor26 has changed IP address.
  2288. o Bugfixes on 0.1.0.x:
  2289. - Fix a possible double-free in tor_gzip_uncompress().
  2290. - When --disable-threads is set, do not search for or link against
  2291. pthreads libraries.
  2292. - Don't trigger an assert if an authoritative directory server
  2293. claims its dirport is 0.
  2294. - Fix bug with removing Tor as an NT service: some people were
  2295. getting "The service did not return an error." Thanks to Matt
  2296. Edman for the fix.
  2297. Changes in version 0.1.1.2-alpha - 2005-07-15
  2298. o New directory servers:
  2299. - tor26 has changed IP address.
  2300. o Bugfixes on 0.1.0.x, crashes/leaks:
  2301. - Port the servers-not-obeying-their-exit-policies fix from
  2302. 0.1.0.11.
  2303. - Fix an fd leak in start_daemon().
  2304. - On Windows, you can't always reopen a port right after you've
  2305. closed it. So change retry_listeners() to only close and re-open
  2306. ports that have changed.
  2307. - Fix a possible double-free in tor_gzip_uncompress().
  2308. o Bugfixes on 0.1.0.x, usability:
  2309. - When tor_socketpair() fails in Windows, give a reasonable
  2310. Windows-style errno back.
  2311. - Let people type "tor --install" as well as "tor -install" when
  2312. they
  2313. want to make it an NT service.
  2314. - NT service patch from Matt Edman to improve error messages.
  2315. - When the controller asks for a config option with an abbreviated
  2316. name, give the full name in our response.
  2317. - Correct the man page entry on TrackHostExitsExpire.
  2318. - Looks like we were never delivering deflated (i.e. compressed)
  2319. running-routers lists, even when asked. Oops.
  2320. - When --disable-threads is set, do not search for or link against
  2321. pthreads libraries.
  2322. o Bugfixes on 0.1.1.x:
  2323. - Fix a seg fault with autodetecting which controller version is
  2324. being used.
  2325. o Features:
  2326. - New hidden service descriptor format: put a version in it, and
  2327. let people specify introduction/rendezvous points that aren't
  2328. in "the directory" (which is subjective anyway).
  2329. - Allow the DEBUG controller event to work again. Mark certain log
  2330. entries as "don't tell this to controllers", so we avoid cycles.
  2331. Changes in version 0.1.0.11 - 2005-06-30
  2332. o Bugfixes on 0.1.0.x:
  2333. - Fix major security bug: servers were disregarding their
  2334. exit policies if clients behaved unexpectedly.
  2335. - Make OS X init script check for missing argument, so we don't
  2336. confuse users who invoke it incorrectly.
  2337. - Fix a seg fault in "tor --hash-password foo".
  2338. - The MAPADDRESS control command was broken.
  2339. Changes in version 0.1.1.1-alpha - 2005-06-29
  2340. o Bugfixes:
  2341. - Make OS X init script check for missing argument, so we don't
  2342. confuse users who invoke it incorrectly.
  2343. - Fix a seg fault in "tor --hash-password foo".
  2344. - Fix a possible way to DoS dirservers.
  2345. - When we complain that your exit policy implicitly allows local or
  2346. private address spaces, name them explicitly so operators can
  2347. fix it.
  2348. - Make the log message less scary when all the dirservers are
  2349. temporarily unreachable.
  2350. - We were printing the number of idle dns workers incorrectly when
  2351. culling them.
  2352. o Features:
  2353. - Revised controller protocol (version 1) that uses ascii rather
  2354. than binary. Add supporting libraries in python and java so you
  2355. can use the controller from your applications without caring how
  2356. our protocol works.
  2357. - Spiffy new support for crypto hardware accelerators. Can somebody
  2358. test this?
  2359. Changes in version 0.0.9.10 - 2005-06-16
  2360. o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
  2361. - Refuse relay cells that claim to have a length larger than the
  2362. maximum allowed. This prevents a potential attack that could read
  2363. arbitrary memory (e.g. keys) from an exit server's process
  2364. (CVE-2005-2050).
  2365. Changes in version 0.1.0.10 - 2005-06-14
  2366. o Allow a few EINVALs from libevent before dying. Warn on kqueue with
  2367. libevent before 1.1a.
  2368. Changes in version 0.1.0.9-rc - 2005-06-09
  2369. o Bugfixes:
  2370. - Reset buf->highwater every time buf_shrink() is called, not just on
  2371. a successful shrink. This was causing significant memory bloat.
  2372. - Fix buffer overflow when checking hashed passwords.
  2373. - Security fix: if seeding the RNG on Win32 fails, quit.
  2374. - Allow seeding the RNG on Win32 even when you're not running as
  2375. Administrator.
  2376. - Disable threading on Solaris too. Something is wonky with it,
  2377. cpuworkers, and reentrant libs.
  2378. - Reenable the part of the code that tries to flush as soon as an
  2379. OR outbuf has a full TLS record available. Perhaps this will make
  2380. OR outbufs not grow as huge except in rare cases, thus saving lots
  2381. of CPU time plus memory.
  2382. - Reject malformed .onion addresses rather then passing them on as
  2383. normal web requests.
  2384. - Adapt patch from Adam Langley: fix possible memory leak in
  2385. tor_lookup_hostname().
  2386. - Initialize libevent later in the startup process, so the logs are
  2387. already established by the time we start logging libevent warns.
  2388. - Use correct errno on win32 if libevent fails.
  2389. - Check and warn about known-bad/slow libevent versions.
  2390. - Pay more attention to the ClientOnly config option.
  2391. - Have torctl.in/tor.sh.in check for location of su binary (needed
  2392. on FreeBSD)
  2393. - Correct/add man page entries for LongLivedPorts, ExitPolicy,
  2394. KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
  2395. HttpProxyAuthenticator
  2396. - Stop warning about sigpipes in the logs. We're going to
  2397. pretend that getting these occassionally is normal and fine.
  2398. - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
  2399. certain
  2400. installer screens; and don't put stuff into StartupItems unless
  2401. the user asks you to.
  2402. - Require servers that use the default dirservers to have public IP
  2403. addresses. We have too many servers that are configured with private
  2404. IPs and their admins never notice the log entries complaining that
  2405. their descriptors are being rejected.
  2406. - Add OSX uninstall instructions. An actual uninstall script will
  2407. come later.
  2408. Changes in version 0.1.0.8-rc - 2005-05-23
  2409. o Bugfixes:
  2410. - It turns out that kqueue on OS X 10.3.9 was causing kernel
  2411. panics. Disable kqueue on all OS X Tors.
  2412. - Fix RPM: remove duplicate line accidentally added to the rpm
  2413. spec file.
  2414. - Disable threads on openbsd too, since its gethostaddr is not
  2415. reentrant either.
  2416. - Tolerate libevent 0.8 since it still works, even though it's
  2417. ancient.
  2418. - Enable building on Red Hat 9.0 again.
  2419. - Allow the middle hop of the testing circuit to be running any
  2420. version, now that most of them have the bugfix to let them connect
  2421. to unknown servers. This will allow reachability testing to work
  2422. even when 0.0.9.7-0.0.9.9 become obsolete.
  2423. - Handle relay cells with rh.length too large. This prevents
  2424. a potential attack that could read arbitrary memory (maybe even
  2425. keys) from the exit server's process.
  2426. - We screwed up the dirport reachability testing when we don't yet
  2427. have a cached version of the directory. Hopefully now fixed.
  2428. - Clean up router_load_single_router() (used by the controller),
  2429. so it doesn't seg fault on error.
  2430. - Fix a minor memory leak when somebody establishes an introduction
  2431. point at your Tor server.
  2432. - If a socks connection ends because read fails, don't warn that
  2433. you're not sending a socks reply back.
  2434. o Features:
  2435. - Add HttpProxyAuthenticator config option too, that works like
  2436. the HttpsProxyAuthenticator config option.
  2437. - Encode hashed controller passwords in hex instead of base64,
  2438. to make it easier to write controllers.
  2439. Changes in version 0.1.0.7-rc - 2005-05-17
  2440. o Bugfixes:
  2441. - Fix a bug in the OS X package installer that prevented it from
  2442. installing on Tiger.
  2443. - Fix a script bug in the OS X package installer that made it
  2444. complain during installation.
  2445. - Find libevent even if it's hiding in /usr/local/ and your
  2446. CFLAGS and LDFLAGS don't tell you to look there.
  2447. - Be able to link with libevent as a shared library (the default
  2448. after 1.0d), even if it's hiding in /usr/local/lib and even
  2449. if you haven't added /usr/local/lib to your /etc/ld.so.conf,
  2450. assuming you're running gcc. Otherwise fail and give a useful
  2451. error message.
  2452. - Fix a bug in the RPM packager: set home directory for _tor to
  2453. something more reasonable when first installing.
  2454. - Free a minor amount of memory that is still reachable on exit.
  2455. Changes in version 0.1.0.6-rc - 2005-05-14
  2456. o Bugfixes:
  2457. - Implement --disable-threads configure option. Disable threads on
  2458. netbsd by default, because it appears to have no reentrant resolver
  2459. functions.
  2460. - Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
  2461. release (1.1) detects and disables kqueue if it's broken.
  2462. - Append default exit policy before checking for implicit internal
  2463. addresses. Now we don't log a bunch of complaints on startup
  2464. when using the default exit policy.
  2465. - Some people were putting "Address " in their torrc, and they had
  2466. a buggy resolver that resolved " " to 0.0.0.0. Oops.
  2467. - If DataDir is ~/.tor, and that expands to /.tor, then default to
  2468. LOCALSTATEDIR/tor instead.
  2469. - Fix fragmented-message bug in TorControl.py.
  2470. - Resolve a minor bug which would prevent unreachable dirports
  2471. from getting suppressed in the published descriptor.
  2472. - When the controller gave us a new descriptor, we weren't resolving
  2473. it immediately, so Tor would think its address was 0.0.0.0 until
  2474. we fetched a new directory.
  2475. - Fix an uppercase/lowercase case error in suppressing a bogus
  2476. libevent warning on some Linuxes.
  2477. o Features:
  2478. - Begin scrubbing sensitive strings from logs by default. Turn off
  2479. the config option SafeLogging if you need to do debugging.
  2480. - Switch to a new buffer management algorithm, which tries to avoid
  2481. reallocing and copying quite as much. In first tests it looks like
  2482. it uses *more* memory on average, but less cpu.
  2483. - First cut at support for "create-fast" cells. Clients can use
  2484. these when extending to their first hop, since the TLS already
  2485. provides forward secrecy and authentication. Not enabled on
  2486. clients yet.
  2487. - When dirservers refuse a router descriptor, we now log its
  2488. contactinfo, platform, and the poster's IP address.
  2489. - Call tor_free_all instead of connections_free_all after forking, to
  2490. save memory on systems that need to fork.
  2491. - Whine at you if you're a server and you don't set your contactinfo.
  2492. - Implement --verify-config command-line option to check if your torrc
  2493. is valid without actually launching Tor.
  2494. - Rewrite address "serifos.exit" to "localhost.serifos.exit"
  2495. rather than just rejecting it.
  2496. Changes in version 0.1.0.5-rc - 2005-04-27
  2497. o Bugfixes:
  2498. - Stop trying to print a null pointer if an OR conn fails because
  2499. we didn't like its cert.
  2500. o Features:
  2501. - Switch our internal buffers implementation to use a ring buffer,
  2502. to hopefully improve performance for fast servers a lot.
  2503. - Add HttpsProxyAuthenticator support (basic auth only), based
  2504. on patch from Adam Langley.
  2505. - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
  2506. the fast servers that have been joining lately.
  2507. - Give hidden service accesses extra time on the first attempt,
  2508. since 60 seconds is often only barely enough. This might improve
  2509. robustness more.
  2510. - Improve performance for dirservers: stop re-parsing the whole
  2511. directory every time you regenerate it.
  2512. - Add more debugging info to help us find the weird dns freebsd
  2513. pthreads bug; cleaner debug messages to help track future issues.
  2514. Changes in version 0.0.9.9 - 2005-04-23
  2515. o Bugfixes on 0.0.9.x:
  2516. - If unofficial Tor clients connect and send weird TLS certs, our
  2517. Tor server triggers an assert. This release contains a minimal
  2518. backport from the broader fix that we put into 0.1.0.4-rc.
  2519. Changes in version 0.1.0.4-rc - 2005-04-23
  2520. o Bugfixes:
  2521. - If unofficial Tor clients connect and send weird TLS certs, our
  2522. Tor server triggers an assert. Stop asserting, and start handling
  2523. TLS errors better in other situations too.
  2524. - When the controller asks us to tell it about all the debug-level
  2525. logs, it turns out we were generating debug-level logs while
  2526. telling it about them, which turns into a bad loop. Now keep
  2527. track of whether you're sending a debug log to the controller,
  2528. and don't log when you are.
  2529. - Fix the "postdescriptor" feature of the controller interface: on
  2530. non-complete success, only say "done" once.
  2531. o Features:
  2532. - Clients are now willing to load balance over up to 2mB, not 1mB,
  2533. of advertised bandwidth capacity.
  2534. - Add a NoPublish config option, so you can be a server (e.g. for
  2535. testing running Tor servers in other Tor networks) without
  2536. publishing your descriptor to the primary dirservers.
  2537. Changes in version 0.1.0.3-rc - 2005-04-08
  2538. o Improvements on 0.1.0.2-rc:
  2539. - Client now retries when streams end early for 'hibernating' or
  2540. 'resource limit' reasons, rather than failing them.
  2541. - More automated handling for dirserver operators:
  2542. - Automatically approve nodes running 0.1.0.2-rc or later,
  2543. now that the the reachability detection stuff is working.
  2544. - Now we allow two unverified servers with the same nickname
  2545. but different keys. But if a nickname is verified, only that
  2546. nickname+key are allowed.
  2547. - If you're an authdirserver connecting to an address:port,
  2548. and it's not the OR you were expecting, forget about that
  2549. descriptor. If he *was* the one you were expecting, then forget
  2550. about all other descriptors for that address:port.
  2551. - Allow servers to publish descriptors from 12 hours in the future.
  2552. Corollary: only whine about clock skew from the dirserver if
  2553. he's a trusted dirserver (since now even verified servers could
  2554. have quite wrong clocks).
  2555. - Adjust maximum skew and age for rendezvous descriptors: let skew
  2556. be 48 hours rather than 90 minutes.
  2557. - Efficiency improvements:
  2558. - Keep a big splay tree of (circid,orconn)->circuit mappings to make
  2559. it much faster to look up a circuit for each relay cell.
  2560. - Remove most calls to assert_all_pending_dns_resolves_ok(),
  2561. since they're eating our cpu on exit nodes.
  2562. - Stop wasting time doing a case insensitive comparison for every
  2563. dns name every time we do any lookup. Canonicalize the names to
  2564. lowercase and be done with it.
  2565. - Start sending 'truncated' cells back rather than destroy cells,
  2566. if the circuit closes in front of you. This means we won't have
  2567. to abandon partially built circuits.
  2568. - Only warn once per nickname from add_nickname_list_to_smartlist
  2569. per failure, so an entrynode or exitnode choice that's down won't
  2570. yell so much.
  2571. - Put a note in the torrc about abuse potential with the default
  2572. exit policy.
  2573. - Revise control spec and implementation to allow all log messages to
  2574. be sent to controller with their severities intact (suggested by
  2575. Matt Edman). Update TorControl to handle new log event types.
  2576. - Provide better explanation messages when controller's POSTDESCRIPTOR
  2577. fails.
  2578. - Stop putting nodename in the Platform string in server descriptors.
  2579. It doesn't actually help, and it is confusing/upsetting some people.
  2580. o Bugfixes on 0.1.0.2-rc:
  2581. - We were printing the host mask wrong in exit policies in server
  2582. descriptors. This isn't a critical bug though, since we were still
  2583. obeying the exit policy internally.
  2584. - Fix Tor when compiled with libevent but without pthreads: move
  2585. connection_unregister() from _connection_free() to
  2586. connection_free().
  2587. - Fix an assert trigger (already fixed in 0.0.9.x): when we have
  2588. the rare mysterious case of accepting a conn on 0.0.0.0:0, then
  2589. when we look through the connection array, we'll find any of the
  2590. cpu/dnsworkers. This is no good.
  2591. o Bugfixes on 0.0.9.8:
  2592. - Fix possible bug on threading platforms (e.g. win32) which was
  2593. leaking a file descriptor whenever a cpuworker or dnsworker died.
  2594. - When using preferred entry or exit nodes, ignore whether the
  2595. circuit wants uptime or capacity. They asked for the nodes, they
  2596. get the nodes.
  2597. - chdir() to your datadirectory at the *end* of the daemonize process,
  2598. not the beginning. This was a problem because the first time you
  2599. run tor, if your datadir isn't there, and you have runasdaemon set
  2600. to 1, it will try to chdir to it before it tries to create it. Oops.
  2601. - Handle changed router status correctly when dirserver reloads
  2602. fingerprint file. We used to be dropping all unverified descriptors
  2603. right then. The bug was hidden because we would immediately
  2604. fetch a directory from another dirserver, which would include the
  2605. descriptors we just dropped.
  2606. - When we're connecting to an OR and he's got a different nickname/key
  2607. than we were expecting, only complain loudly if we're an OP or a
  2608. dirserver. Complaining loudly to the OR admins just confuses them.
  2609. - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
  2610. artificially capped at 500kB.
  2611. Changes in version 0.0.9.8 - 2005-04-07
  2612. o Bugfixes on 0.0.9.x:
  2613. - We have a bug that I haven't found yet. Sometimes, very rarely,
  2614. cpuworkers get stuck in the 'busy' state, even though the cpuworker
  2615. thinks of itself as idle. This meant that no new circuits ever got
  2616. established. Here's a workaround to kill any cpuworker that's been
  2617. busy for more than 100 seconds.
  2618. Changes in version 0.1.0.2-rc - 2005-04-01
  2619. o Bugfixes on 0.1.0.1-rc:
  2620. - Fixes on reachability detection:
  2621. - Don't check for reachability while hibernating.
  2622. - If ORPort is reachable but DirPort isn't, still publish the
  2623. descriptor, but zero out DirPort until it's found reachable.
  2624. - When building testing circs for ORPort testing, use only
  2625. high-bandwidth nodes, so fewer circuits fail.
  2626. - Complain about unreachable ORPort separately from unreachable
  2627. DirPort, so the user knows what's going on.
  2628. - Make sure we only conclude ORPort reachability if we didn't
  2629. initiate the conn. Otherwise we could falsely conclude that
  2630. we're reachable just because we connected to the guy earlier
  2631. and he used that same pipe to extend to us.
  2632. - Authdirservers shouldn't do ORPort reachability detection,
  2633. since they're in clique mode, so it will be rare to find a
  2634. server not already connected to them.
  2635. - When building testing circuits, always pick middle hops running
  2636. Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
  2637. bug. (This is a kludge; it will go away when 0.0.9.x becomes
  2638. obsolete.)
  2639. - When we decide we're reachable, actually publish our descriptor
  2640. right then.
  2641. - Fix bug in redirectstream in the controller.
  2642. - Fix the state descriptor strings so logs don't claim edge streams
  2643. are in a different state than they actually are.
  2644. - Use recent libevent features when possible (this only really affects
  2645. win32 and osx right now, because the new libevent with these
  2646. features hasn't been released yet). Add code to suppress spurious
  2647. libevent log msgs.
  2648. - Prevent possible segfault in connection_close_unattached_ap().
  2649. - Fix newlines on torrc in win32.
  2650. - Improve error msgs when tor-resolve fails.
  2651. o Improvements on 0.0.9.x:
  2652. - New experimental script tor/contrib/ExerciseServer.py (needs more
  2653. work) that uses the controller interface to build circuits and
  2654. fetch pages over them. This will help us bootstrap servers that
  2655. have lots of capacity but haven't noticed it yet.
  2656. - New experimental script tor/contrib/PathDemo.py (needs more work)
  2657. that uses the controller interface to let you choose whole paths
  2658. via addresses like
  2659. "<hostname>.<path,separated by dots>.<length of path>.path"
  2660. - When we've connected to an OR and handshaked but didn't like
  2661. the result, we were closing the conn without sending destroy
  2662. cells back for pending circuits. Now send those destroys.
  2663. Changes in version 0.0.9.7 - 2005-04-01
  2664. o Bugfixes on 0.0.9.x:
  2665. - Fix another race crash bug (thanks to Glenn Fink for reporting).
  2666. - Compare identity to identity, not to nickname, when extending to
  2667. a router not already in the directory. This was preventing us from
  2668. extending to unknown routers. Oops.
  2669. - Make sure to create OS X Tor user in <500 range, so we aren't
  2670. creating actual system users.
  2671. - Note where connection-that-hasn't-sent-end was marked, and fix
  2672. a few really loud instances of this harmless bug (it's fixed more
  2673. in 0.1.0.x).
  2674. Changes in version 0.1.0.1-rc - 2005-03-28
  2675. o New features:
  2676. - Add reachability testing. Your Tor server will automatically try
  2677. to see if its ORPort and DirPort are reachable from the outside,
  2678. and it won't upload its descriptor until it decides they are.
  2679. - Handle unavailable hidden services better. Handle slow or busy
  2680. hidden services better.
  2681. - Add support for CONNECTing through https proxies, with "HttpsProxy"
  2682. config option.
  2683. - New exit policy: accept most low-numbered ports, rather than
  2684. rejecting most low-numbered ports.
  2685. - More Tor controller support (still experimental). See
  2686. http://tor.eff.org/doc/control-spec.txt for all the new features,
  2687. including signals to emulate unix signals from any platform;
  2688. redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
  2689. closestream; closecircuit; etc.
  2690. - Make nt services work and start on startup on win32 (based on
  2691. patch by Matt Edman).
  2692. - Add a new AddressMap config directive to rewrite incoming socks
  2693. addresses. This lets you, for example, declare an implicit
  2694. required exit node for certain sites.
  2695. - Add a new TrackHostExits config directive to trigger addressmaps
  2696. for certain incoming socks addresses -- for sites that break when
  2697. your exit keeps changing (based on patch by Mike Perry).
  2698. - Redo the client-side dns cache so it's just an addressmap too.
  2699. - Notice when our IP changes, and reset stats/uptime/reachability.
  2700. - When an application is using socks5, give him the whole variety of
  2701. potential socks5 responses (connect refused, host unreachable, etc),
  2702. rather than just "success" or "failure".
  2703. - A more sane version numbering system. See
  2704. http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
  2705. - New contributed script "exitlist": a simple python script to
  2706. parse directories and find Tor nodes that exit to listed
  2707. addresses/ports.
  2708. - New contributed script "privoxy-tor-toggle" to toggle whether
  2709. Privoxy uses Tor. Seems to be configured for Debian by default.
  2710. - Report HTTP reasons to client when getting a response from directory
  2711. servers -- so you can actually know what went wrong.
  2712. - New config option MaxAdvertisedBandwidth which lets you advertise
  2713. a low bandwidthrate (to not attract as many circuits) while still
  2714. allowing a higher bandwidthrate in reality.
  2715. o Robustness/stability fixes:
  2716. - Make Tor use Niels Provos's libevent instead of its current
  2717. poll-but-sometimes-select mess. This will let us use faster async
  2718. cores (like epoll, kpoll, and /dev/poll), and hopefully work better
  2719. on Windows too.
  2720. - pthread support now too. This was forced because when we forked,
  2721. we ended up wasting a lot of duplicate ram over time. Also switch
  2722. to foo_r versions of some library calls to allow reentry and
  2723. threadsafeness.
  2724. - Better handling for heterogeneous / unreliable nodes:
  2725. - Annotate circuits w/ whether they aim to contain high uptime nodes
  2726. and/or high capacity nodes. When building circuits, choose
  2727. appropriate nodes.
  2728. - This means that every single node in an intro rend circuit,
  2729. not just the last one, will have a minimum uptime.
  2730. - New config option LongLivedPorts to indicate application streams
  2731. that will want high uptime circuits.
  2732. - Servers reset uptime when a dir fetch entirely fails. This
  2733. hopefully reflects stability of the server's network connectivity.
  2734. - If somebody starts his tor server in Jan 2004 and then fixes his
  2735. clock, don't make his published uptime be a year.
  2736. - Reset published uptime when you wake up from hibernation.
  2737. - Introduce a notion of 'internal' circs, which are chosen without
  2738. regard to the exit policy of the last hop. Intro and rendezvous
  2739. circs must be internal circs, to avoid leaking information. Resolve
  2740. and connect streams can use internal circs if they want.
  2741. - New circuit pooling algorithm: make sure to have enough circs around
  2742. to satisfy any predicted ports, and also make sure to have 2 internal
  2743. circs around if we've required internal circs lately (and with high
  2744. uptime if we've seen that lately too).
  2745. - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
  2746. which describes how often we retry making new circuits if current
  2747. ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
  2748. how long we're willing to make use of an already-dirty circuit.
  2749. - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
  2750. circ as necessary, if there are any completed ones lying around
  2751. when we try to launch one.
  2752. - Make hidden services try to establish a rendezvous for 30 seconds,
  2753. rather than for n (where n=3) attempts to build a circuit.
  2754. - Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
  2755. "ShutdownWaitLength".
  2756. - Try to be more zealous about calling connection_edge_end when
  2757. things go bad with edge conns in connection.c.
  2758. - Revise tor-spec to add more/better stream end reasons.
  2759. - Revise all calls to connection_edge_end to avoid sending "misc",
  2760. and to take errno into account where possible.
  2761. o Bug fixes:
  2762. - Fix a race condition that can trigger an assert, when we have a
  2763. pending create cell and an OR connection fails right then.
  2764. - Fix several double-mark-for-close bugs, e.g. where we were finding
  2765. a conn for a cell even if that conn is already marked for close.
  2766. - Make sequence of log messages when starting on win32 with no config
  2767. file more reasonable.
  2768. - When choosing an exit node for a new non-internal circ, don't take
  2769. into account whether it'll be useful for any pending x.onion
  2770. addresses -- it won't.
  2771. - Turn addr_policy_compare from a tristate to a quadstate; this should
  2772. help address our "Ah, you allow 1.2.3.4:80. You are a good choice
  2773. for google.com" problem.
  2774. - Make "platform" string in descriptor more accurate for Win32 servers,
  2775. so it's not just "unknown platform".
  2776. - Fix an edge case in parsing config options (thanks weasel).
  2777. If they say "--" on the commandline, it's not an option.
  2778. - Reject odd-looking addresses at the client (e.g. addresses that
  2779. contain a colon), rather than having the server drop them because
  2780. they're malformed.
  2781. - tor-resolve requests were ignoring .exit if there was a working circuit
  2782. they could use instead.
  2783. - REUSEADDR on normal platforms means you can rebind to the port
  2784. right after somebody else has let it go. But REUSEADDR on win32
  2785. means to let you bind to the port _even when somebody else
  2786. already has it bound_! So, don't do that on Win32.
  2787. - Change version parsing logic: a version is "obsolete" if it is not
  2788. recommended and (1) there is a newer recommended version in the
  2789. same series, or (2) there are no recommended versions in the same
  2790. series, but there are some recommended versions in a newer series.
  2791. A version is "new" if it is newer than any recommended version in
  2792. the same series.
  2793. - Stop most cases of hanging up on a socks connection without sending
  2794. the socks reject.
  2795. o Helpful fixes:
  2796. - Require BandwidthRate to be at least 20kB/s for servers.
  2797. - When a dirserver causes you to give a warn, mention which dirserver
  2798. it was.
  2799. - New config option DirAllowPrivateAddresses for authdirservers.
  2800. Now by default they refuse router descriptors that have non-IP or
  2801. private-IP addresses.
  2802. - Stop publishing socksport in the directory, since it's not
  2803. actually meant to be public. For compatibility, publish a 0 there
  2804. for now.
  2805. - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
  2806. smart" value, that is low for servers and high for clients.
  2807. - If our clock jumps forward by 100 seconds or more, assume something
  2808. has gone wrong with our network and abandon all not-yet-used circs.
  2809. - Warn when exit policy implicitly allows local addresses.
  2810. - If we get an incredibly skewed timestamp from a dirserver mirror
  2811. that isn't a verified OR, don't warn -- it's probably him that's
  2812. wrong.
  2813. - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
  2814. cookies to disk and doesn't log each web request to disk. (Thanks
  2815. to Brett Carrington for pointing this out.)
  2816. - When a client asks us for a dir mirror and we don't have one,
  2817. launch an attempt to get a fresh one.
  2818. - If we're hibernating and we get a SIGINT, exit immediately.
  2819. - Add --with-dmalloc ./configure option, to track memory leaks.
  2820. - And try to free all memory on closing, so we can detect what
  2821. we're leaking.
  2822. - Cache local dns resolves correctly even when they're .exit
  2823. addresses.
  2824. - Give a better warning when some other server advertises an
  2825. ORPort that is actually an apache running ssl.
  2826. - Add "opt hibernating 1" to server descriptor to make it clearer
  2827. whether the server is hibernating.
  2828. Changes in version 0.0.9.6 - 2005-03-24
  2829. o Bugfixes on 0.0.9.x (crashes and asserts):
  2830. - Add new end stream reasons to maintainance branch. Fix bug where
  2831. reason (8) could trigger an assert. Prevent bug from recurring.
  2832. - Apparently win32 stat wants paths to not end with a slash.
  2833. - Fix assert triggers in assert_cpath_layer_ok(), where we were
  2834. blowing away the circuit that conn->cpath_layer points to, then
  2835. checking to see if the circ is well-formed. Backport check to make
  2836. sure we dont use the cpath on a closed connection.
  2837. - Prevent circuit_resume_edge_reading_helper() from trying to package
  2838. inbufs for marked-for-close streams.
  2839. - Don't crash on hup if your options->address has become unresolvable.
  2840. - Some systems (like OS X) sometimes accept() a connection and tell
  2841. you the remote host is 0.0.0.0:0. If this happens, due to some
  2842. other mis-features, we get confused; so refuse the conn for now.
  2843. o Bugfixes on 0.0.9.x (other):
  2844. - Fix harmless but scary "Unrecognized content encoding" warn message.
  2845. - Add new stream error reason: TORPROTOCOL reason means "you are not
  2846. speaking a version of Tor I understand; say bye-bye to your stream."
  2847. - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
  2848. into the future, now that we are more tolerant of skew. This
  2849. resolves a bug where a Tor server would refuse to cache a directory
  2850. because all the directories it gets are too far in the future;
  2851. yet the Tor server never logs any complaints about clock skew.
  2852. - Mac packaging magic: make man pages useable, and do not overwrite
  2853. existing torrc files.
  2854. - Make OS X log happily to /var/log/tor/tor.log
  2855. Changes in version 0.0.9.5 - 2005-02-22
  2856. o Bugfixes on 0.0.9.x:
  2857. - Fix an assert race at exit nodes when resolve requests fail.
  2858. - Stop picking unverified dir mirrors--it only leads to misery.
  2859. - Patch from Matt Edman to make NT services work better. Service
  2860. support is still not compiled into the executable by default.
  2861. - Patch from Dmitri Bely so the Tor service runs better under
  2862. the win32 SYSTEM account.
  2863. - Make tor-resolve actually work (?) on Win32.
  2864. - Fix a sign bug when getrlimit claims to have 4+ billion
  2865. file descriptors available.
  2866. - Stop refusing to start when bandwidthburst == bandwidthrate.
  2867. - When create cells have been on the onion queue more than five
  2868. seconds, just send back a destroy and take them off the list.
  2869. Changes in version 0.0.9.4 - 2005-02-03
  2870. o Bugfixes on 0.0.9:
  2871. - Fix an assert bug that took down most of our servers: when
  2872. a server claims to have 1 GB of bandwidthburst, don't
  2873. freak out.
  2874. - Don't crash as badly if we have spawned the max allowed number
  2875. of dnsworkers, or we're out of file descriptors.
  2876. - Block more file-sharing ports in the default exit policy.
  2877. - MaxConn is now automatically set to the hard limit of max
  2878. file descriptors we're allowed (ulimit -n), minus a few for
  2879. logs, etc.
  2880. - Give a clearer message when servers need to raise their
  2881. ulimit -n when they start running out of file descriptors.
  2882. - SGI Compatibility patches from Jan Schaumann.
  2883. - Tolerate a corrupt cached directory better.
  2884. - When a dirserver hasn't approved your server, list which one.
  2885. - Go into soft hibernation after 95% of the bandwidth is used,
  2886. not 99%. This is especially important for daily hibernators who
  2887. have a small accounting max. Hopefully it will result in fewer
  2888. cut connections when the hard hibernation starts.
  2889. - Load-balance better when using servers that claim more than
  2890. 800kB/s of capacity.
  2891. - Make NT services work (experimental, only used if compiled in).
  2892. Changes in version 0.0.9.3 - 2005-01-21
  2893. o Bugfixes on 0.0.9:
  2894. - Backport the cpu use fixes from main branch, so busy servers won't
  2895. need as much processor time.
  2896. - Work better when we go offline and then come back, or when we
  2897. run Tor at boot before the network is up. We do this by
  2898. optimistically trying to fetch a new directory whenever an
  2899. application request comes in and we think we're offline -- the
  2900. human is hopefully a good measure of when the network is back.
  2901. - Backport some minimal hidserv bugfixes: keep rend circuits open as
  2902. long as you keep using them; actually publish hidserv descriptors
  2903. shortly after they change, rather than waiting 20-40 minutes.
  2904. - Enable Mac startup script by default.
  2905. - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
  2906. - When you update AllowUnverifiedNodes or FirewallPorts via the
  2907. controller's setconf feature, we were always appending, never
  2908. resetting.
  2909. - When you update HiddenServiceDir via setconf, it was screwing up
  2910. the order of reading the lines, making it fail.
  2911. - Do not rewrite a cached directory back to the cache; otherwise we
  2912. will think it is recent and not fetch a newer one on startup.
  2913. - Workaround for webservers that lie about Content-Encoding: Tor
  2914. now tries to autodetect compressed directories and compression
  2915. itself. This lets us Proxypass dir fetches through apache.
  2916. Changes in version 0.0.9.2 - 2005-01-04
  2917. o Bugfixes on 0.0.9 (crashes and asserts):
  2918. - Fix an assert on startup when the disk is full and you're logging
  2919. to a file.
  2920. - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
  2921. style address, then we'd crash.
  2922. - Fix an assert trigger when the running-routers string we get from
  2923. a dirserver is broken.
  2924. - Make worker threads start and run on win32. Now win32 servers
  2925. may work better.
  2926. - Bandaid (not actually fix, but now it doesn't crash) an assert
  2927. where the dns worker dies mysteriously and the main Tor process
  2928. doesn't remember anything about the address it was resolving.
  2929. o Bugfixes on 0.0.9 (Win32):
  2930. - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
  2931. name out of the warning/assert messages.
  2932. - Fix a superficial "unhandled error on read" bug on win32.
  2933. - The win32 installer no longer requires a click-through for our
  2934. license, since our Free Software license grants rights but does not
  2935. take any away.
  2936. - Win32: When connecting to a dirserver fails, try another one
  2937. immediately. (This was already working for non-win32 Tors.)
  2938. - Stop trying to parse $HOME on win32 when hunting for default
  2939. DataDirectory.
  2940. - Make tor-resolve.c work on win32 by calling network_init().
  2941. o Bugfixes on 0.0.9 (other):
  2942. - Make 0.0.9.x build on Solaris again.
  2943. - Due to a fencepost error, we were blowing away the \n when reporting
  2944. confvalue items in the controller. So asking for multiple config
  2945. values at once couldn't work.
  2946. - When listing circuits that are pending on an opening OR connection,
  2947. if we're an OR we were listing circuits that *end* at us as
  2948. being pending on every listener, dns/cpu worker, etc. Stop that.
  2949. - Dirservers were failing to create 'running-routers' or 'directory'
  2950. strings if we had more than some threshold of routers. Fix them so
  2951. they can handle any number of routers.
  2952. - Fix a superficial "Duplicate mark for close" bug.
  2953. - Stop checking for clock skew for OR connections, even for servers.
  2954. - Fix a fencepost error that was chopping off the last letter of any
  2955. nickname that is the maximum allowed nickname length.
  2956. - Update URLs in log messages so they point to the new website.
  2957. - Fix a potential problem in mangling server private keys while
  2958. writing to disk (not triggered yet, as far as we know).
  2959. - Include the licenses for other free software we include in Tor,
  2960. now that we're shipping binary distributions more regularly.
  2961. Changes in version 0.0.9.1 - 2004-12-15
  2962. o Bugfixes on 0.0.9:
  2963. - Make hibernation actually work.
  2964. - Make HashedControlPassword config option work.
  2965. - When we're reporting event circuit status to a controller,
  2966. don't use the stream status code.
  2967. Changes in version 0.0.9 - 2004-12-12
  2968. o Cleanups:
  2969. - Clean up manpage and torrc.sample file.
  2970. - Clean up severities and text of log warnings.
  2971. o Mistakes:
  2972. - Make servers trigger an assert when they enter hibernation.
  2973. Changes in version 0.0.9rc7 - 2004-12-08
  2974. o Bugfixes on 0.0.9rc:
  2975. - Fix a stack-trashing crash when an exit node begins hibernating.
  2976. - Avoid looking at unallocated memory while considering which
  2977. ports we need to build circuits to cover.
  2978. - Stop a sigpipe: when an 'end' cell races with eof from the app,
  2979. we shouldn't hold-open-until-flush if the eof arrived first.
  2980. - Fix a bug with init_cookie_authentication() in the controller.
  2981. - When recommending new-format log lines, if the upper bound is
  2982. LOG_ERR, leave it implicit.
  2983. o Bugfixes on 0.0.8.1:
  2984. - Fix a whole slew of memory leaks.
  2985. - Fix isspace() and friends so they still make Solaris happy
  2986. but also so they don't trigger asserts on win32.
  2987. - Fix parse_iso_time on platforms without strptime (eg win32).
  2988. - win32: tolerate extra "readable" events better.
  2989. - win32: when being multithreaded, leave parent fdarray open.
  2990. - Make unit tests work on win32.
  2991. Changes in version 0.0.9rc6 - 2004-12-06
  2992. o Bugfixes on 0.0.9pre:
  2993. - Clean up some more integer underflow opportunities (not exploitable
  2994. we think).
  2995. - While hibernating, hup should not regrow our listeners.
  2996. - Send an end to the streams we close when we hibernate, rather
  2997. than just chopping them off.
  2998. - React to eof immediately on non-open edge connections.
  2999. o Bugfixes on 0.0.8.1:
  3000. - Calculate timeout for waiting for a connected cell from the time
  3001. we sent the begin cell, not from the time the stream started. If
  3002. it took a long time to establish the circuit, we would time out
  3003. right after sending the begin cell.
  3004. - Fix router_compare_addr_to_addr_policy: it was not treating a port
  3005. of * as always matching, so we were picking reject *:* nodes as
  3006. exit nodes too. Oops.
  3007. o Features:
  3008. - New circuit building strategy: keep a list of ports that we've
  3009. used in the past 6 hours, and always try to have 2 circuits open
  3010. or on the way that will handle each such port. Seed us with port
  3011. 80 so web users won't complain that Tor is "slow to start up".
  3012. - Make kill -USR1 dump more useful stats about circuits.
  3013. - When warning about retrying or giving up, print the address, so
  3014. the user knows which one it's talking about.
  3015. - If you haven't used a clean circuit in an hour, throw it away,
  3016. just to be on the safe side. (This means after 6 hours a totally
  3017. unused Tor client will have no circuits open.)
  3018. Changes in version 0.0.9rc5 - 2004-12-01
  3019. o Bugfixes on 0.0.8.1:
  3020. - Disallow NDEBUG. We don't ever want anybody to turn off debug.
  3021. - Let resolve conns retry/expire also, rather than sticking around
  3022. forever.
  3023. - If we are using select, make sure we stay within FD_SETSIZE.
  3024. o Bugfixes on 0.0.9pre:
  3025. - Fix integer underflow in tor_vsnprintf() that may be exploitable,
  3026. but doesn't seem to be currently; thanks to Ilja van Sprundel for
  3027. finding it.
  3028. - If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
  3029. instead. Impose minima and maxima for all *Period options; impose
  3030. even tighter maxima for fetching if we are a caching dirserver.
  3031. Clip rather than rejecting.
  3032. - Fetch cached running-routers from servers that serve it (that is,
  3033. authdirservers and servers running 0.0.9rc5-cvs or later.)
  3034. o Features:
  3035. - Accept *:706 (silc) in default exit policy.
  3036. - Implement new versioning format for post 0.1.
  3037. - Support "foo.nickname.exit" addresses, to let Alice request the
  3038. address "foo" as viewed by exit node "nickname". Based on a patch
  3039. by Geoff Goodell.
  3040. - Make tor --version --version dump the cvs Id of every file.
  3041. Changes in version 0.0.9rc4 - 2004-11-28
  3042. o Bugfixes on 0.0.8.1:
  3043. - Make windows sockets actually non-blocking (oops), and handle
  3044. win32 socket errors better.
  3045. o Bugfixes on 0.0.9rc1:
  3046. - Actually catch the -USR2 signal.
  3047. Changes in version 0.0.9rc3 - 2004-11-25
  3048. o Bugfixes on 0.0.8.1:
  3049. - Flush the log file descriptor after we print "Tor opening log file",
  3050. so we don't see those messages days later.
  3051. o Bugfixes on 0.0.9rc1:
  3052. - Make tor-resolve work again.
  3053. - Avoid infinite loop in tor-resolve if tor hangs up on it.
  3054. - Fix an assert trigger for clients/servers handling resolves.
  3055. Changes in version 0.0.9rc2 - 2004-11-24
  3056. o Bugfixes on 0.0.9rc1:
  3057. - I broke socks5 support while fixing the eof bug.
  3058. - Allow unitless bandwidths and intervals; they default to bytes
  3059. and seconds.
  3060. - New servers don't start out hibernating; they are active until
  3061. they run out of bytes, so they have a better estimate of how
  3062. long it takes, and so their operators can know they're working.
  3063. Changes in version 0.0.9rc1 - 2004-11-23
  3064. o Bugfixes on 0.0.8.1:
  3065. - Finally fix a bug that's been plaguing us for a year:
  3066. With high load, circuit package window was reaching 0. Whenever
  3067. we got a circuit-level sendme, we were reading a lot on each
  3068. socket, but only writing out a bit. So we would eventually reach
  3069. eof. This would be noticed and acted on even when there were still
  3070. bytes sitting in the inbuf.
  3071. - When poll() is interrupted, we shouldn't believe the revents values.
  3072. o Bugfixes on 0.0.9pre6:
  3073. - Fix hibernate bug that caused pre6 to be broken.
  3074. - Don't keep rephist info for routers that haven't had activity for
  3075. 24 hours. (This matters now that clients have keys, since we track
  3076. them too.)
  3077. - Never call close_temp_logs while validating log options.
  3078. - Fix backslash-escaping on tor.sh.in and torctl.in.
  3079. o Features:
  3080. - Implement weekly/monthly/daily accounting: now you specify your
  3081. hibernation properties by
  3082. AccountingMax N bytes|KB|MB|GB|TB
  3083. AccountingStart day|week|month [day] HH:MM
  3084. Defaults to "month 1 0:00".
  3085. - Let bandwidth and interval config options be specified as 5 bytes,
  3086. kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
  3087. - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
  3088. get back to normal.)
  3089. - If your requested entry or exit node has advertised bandwidth 0,
  3090. pick it anyway.
  3091. - Be more greedy about filling up relay cells -- we try reading again
  3092. once we've processed the stuff we read, in case enough has arrived
  3093. to fill the last cell completely.
  3094. - Apply NT service patch from Osamu Fujino. Still needs more work.
  3095. Changes in version 0.0.9pre6 - 2004-11-15
  3096. o Bugfixes on 0.0.8.1:
  3097. - Fix assert failure on malformed socks4a requests.
  3098. - Use identity comparison, not nickname comparison, to choose which
  3099. half of circuit-ID-space each side gets to use. This is needed
  3100. because sometimes we think of a router as a nickname, and sometimes
  3101. as a hex ID, and we can't predict what the other side will do.
  3102. - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
  3103. write() call will fail and we handle it there.
  3104. - Add a FAST_SMARTLIST define to optionally inline smartlist_get
  3105. and smartlist_len, which are two major profiling offenders.
  3106. o Bugfixes on 0.0.9pre5:
  3107. - Fix a bug in read_all that was corrupting config files on windows.
  3108. - When we're raising the max number of open file descriptors to
  3109. 'unlimited', don't log that we just raised it to '-1'.
  3110. - Include event code with events, as required by control-spec.txt.
  3111. - Don't give a fingerprint when clients do --list-fingerprint:
  3112. it's misleading, because it will never be the same again.
  3113. - Stop using strlcpy in tor_strndup, since it was slowing us
  3114. down a lot.
  3115. - Remove warn on startup about missing cached-directory file.
  3116. - Make kill -USR1 work again.
  3117. - Hibernate if we start tor during the "wait for wakeup-time" phase
  3118. of an accounting interval. Log our hibernation plans better.
  3119. - Authoritative dirservers now also cache their directory, so they
  3120. have it on start-up.
  3121. o Features:
  3122. - Fetch running-routers; cache running-routers; compress
  3123. running-routers; serve compressed running-routers.z
  3124. - Add NSI installer script contributed by J Doe.
  3125. - Commit VC6 and VC7 workspace/project files.
  3126. - Commit a tor.spec for making RPM files, with help from jbash.
  3127. - Add contrib/torctl.in contributed by Glenn Fink.
  3128. - Implement the control-spec's SAVECONF command, to write your
  3129. configuration to torrc.
  3130. - Get cookie authentication for the controller closer to working.
  3131. - Include control-spec.txt in the tarball.
  3132. - When set_conf changes our server descriptor, upload a new copy.
  3133. But don't upload it too often if there are frequent changes.
  3134. - Document authentication config in man page, and document signals
  3135. we catch.
  3136. - Clean up confusing parts of man page and torrc.sample.
  3137. - Make expand_filename handle ~ and ~username.
  3138. - Use autoconf to enable largefile support where necessary. Use
  3139. ftello where available, since ftell can fail at 2GB.
  3140. - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
  3141. log more informatively.
  3142. - Give a slightly more useful output for "tor -h".
  3143. - Refuse application socks connections to port 0.
  3144. - Check clock skew for verified servers, but allow unverified
  3145. servers and clients to have any clock skew.
  3146. - Break DirFetchPostPeriod into:
  3147. - DirFetchPeriod for fetching full directory,
  3148. - StatusFetchPeriod for fetching running-routers,
  3149. - DirPostPeriod for posting server descriptor,
  3150. - RendPostPeriod for posting hidden service descriptors.
  3151. - Make sure the hidden service descriptors are at a random offset
  3152. from each other, to hinder linkability.
  3153. Changes in version 0.0.9pre5 - 2004-11-09
  3154. o Bugfixes on 0.0.9pre4:
  3155. - Fix a seg fault in unit tests (doesn't affect main program).
  3156. - Fix an assert bug where a hidden service provider would fail if
  3157. the first hop of his rendezvous circuit was down.
  3158. - Hidden service operators now correctly handle version 1 style
  3159. INTRODUCE1 cells (nobody generates them still, so not a critical
  3160. bug).
  3161. - If do_hup fails, actually notice.
  3162. - Handle more errnos from accept() without closing the listener.
  3163. Some OpenBSD machines were closing their listeners because
  3164. they ran out of file descriptors.
  3165. - Send resolve cells to exit routers that are running a new
  3166. enough version of the resolve code to work right.
  3167. - Better handling of winsock includes on non-MSV win32 compilers.
  3168. - Some people had wrapped their tor client/server in a script
  3169. that would restart it whenever it died. This did not play well
  3170. with our "shut down if your version is obsolete" code. Now people
  3171. don't fetch a new directory if their local cached version is
  3172. recent enough.
  3173. - Make our autogen.sh work on ksh as well as bash.
  3174. o Major Features:
  3175. - Hibernation: New config option "AccountingMaxKB" lets you
  3176. set how many KBytes per month you want to allow your server to
  3177. consume. Rather than spreading those bytes out evenly over the
  3178. month, we instead hibernate for some of the month and pop up
  3179. at a deterministic time, work until the bytes are consumed, then
  3180. hibernate again. Config option "MonthlyAccountingStart" lets you
  3181. specify which day of the month your billing cycle starts on.
  3182. - Control interface: a separate program can now talk to your
  3183. client/server over a socket, and get/set config options, receive
  3184. notifications of circuits and streams starting/finishing/dying,
  3185. bandwidth used, etc. The next step is to get some GUIs working.
  3186. Let us know if you want to help out. See doc/control-spec.txt .
  3187. - Ship a contrib/tor-control.py as an example script to interact
  3188. with the control port.
  3189. - "tor --hash-password zzyxz" will output a salted password for
  3190. use in authenticating to the control interface.
  3191. - New log format in config:
  3192. "Log minsev[-maxsev] stdout|stderr|syslog" or
  3193. "Log minsev[-maxsev] file /var/foo"
  3194. o Minor Features:
  3195. - DirPolicy config option, to let people reject incoming addresses
  3196. from their dirserver.
  3197. - "tor --list-fingerprint" will list your identity key fingerprint
  3198. and then exit.
  3199. - Add "pass" target for RedirectExit, to make it easier to break
  3200. out of a sequence of RedirectExit rules.
  3201. - Clients now generate a TLS cert too, in preparation for having
  3202. them act more like real nodes.
  3203. - Ship src/win32/ in the tarball, so people can use it to build.
  3204. - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
  3205. is broken.
  3206. - New "router-status" line in directory, to better bind each verified
  3207. nickname to its identity key.
  3208. - Deprecate unofficial config option abbreviations, and abbreviations
  3209. not on the command line.
  3210. - Add a pure-C tor-resolve implementation.
  3211. - Use getrlimit and friends to ensure we can reach MaxConn (currently
  3212. 1024) file descriptors.
  3213. o Code security improvements, inspired by Ilja:
  3214. - Replace sprintf with snprintf. (I think they were all safe, but
  3215. hey.)
  3216. - Replace strcpy/strncpy with strlcpy in more places.
  3217. - Avoid strcat; use snprintf or strlcat instead.
  3218. - snprintf wrapper with consistent (though not C99) overflow behavior.
  3219. Changes in version 0.0.9pre4 - 2004-10-17
  3220. o Bugfixes on 0.0.9pre3:
  3221. - If the server doesn't specify an exit policy, use the real default
  3222. exit policy, not reject *:*.
  3223. - Ignore fascistfirewall when uploading/downloading hidden service
  3224. descriptors, since we go through Tor for those; and when using
  3225. an HttpProxy, since we assume it can reach them all.
  3226. - When looking for an authoritative dirserver, use only the ones
  3227. configured at boot. Don't bother looking in the directory.
  3228. - The rest of the fix for get_default_conf_file() on older win32.
  3229. - Make 'Routerfile' config option obsolete.
  3230. o Features:
  3231. - New 'MyFamily nick1,...' config option for a server to
  3232. specify other servers that shouldn't be used in the same circuit
  3233. with it. Only believed if nick1 also specifies us.
  3234. - New 'NodeFamily nick1,nick2,...' config option for a client to
  3235. specify nodes that it doesn't want to use in the same circuit.
  3236. - New 'Redirectexit pattern address:port' config option for a
  3237. server to redirect exit connections, e.g. to a local squid.
  3238. Changes in version 0.0.9pre3 - 2004-10-13
  3239. o Bugfixes on 0.0.8.1:
  3240. - Better torrc example lines for dirbindaddress and orbindaddress.
  3241. - Improved bounds checking on parsed ints (e.g. config options and
  3242. the ones we find in directories.)
  3243. - Better handling of size_t vs int, so we're more robust on 64
  3244. bit platforms.
  3245. - Fix the rest of the bug where a newly started OR would appear
  3246. as unverified even after we've added his fingerprint and hupped
  3247. the dirserver.
  3248. - Fix a bug from 0.0.7: when read() failed on a stream, we would
  3249. close it without sending back an end. So 'connection refused'
  3250. would simply be ignored and the user would get no response.
  3251. o Bugfixes on 0.0.9pre2:
  3252. - Serving the cached-on-disk directory to people is bad. We now
  3253. provide no directory until we've fetched a fresh one.
  3254. - Workaround for bug on windows where cached-directories get crlf
  3255. corruption.
  3256. - Make get_default_conf_file() work on older windows too.
  3257. - If we write a *:* exit policy line in the descriptor, don't write
  3258. any more exit policy lines.
  3259. o Features:
  3260. - Use only 0.0.9pre1 and later servers for resolve cells.
  3261. - Make the dirservers file obsolete.
  3262. - Include a dir-signing-key token in directories to tell the
  3263. parsing entity which key is being used to sign.
  3264. - Remove the built-in bulky default dirservers string.
  3265. - New config option "Dirserver %s:%d [fingerprint]", which can be
  3266. repeated as many times as needed. If no dirservers specified,
  3267. default to moria1,moria2,tor26.
  3268. - Make moria2 advertise a dirport of 80, so people behind firewalls
  3269. will be able to get a directory.
  3270. - Http proxy support
  3271. - Dirservers translate requests for http://%s:%d/x to /x
  3272. - You can specify "HttpProxy %s[:%d]" and all dir fetches will
  3273. be routed through this host.
  3274. - Clients ask for /tor/x rather than /x for new enough dirservers.
  3275. This way we can one day coexist peacefully with apache.
  3276. - Clients specify a "Host: %s%d" http header, to be compatible
  3277. with more proxies, and so running squid on an exit node can work.
  3278. Changes in version 0.0.8.1 - 2004-10-13
  3279. o Bugfixes:
  3280. - Fix a seg fault that can be triggered remotely for Tor
  3281. clients/servers with an open dirport.
  3282. - Fix a rare assert trigger, where routerinfos for entries in
  3283. our cpath would expire while we're building the path.
  3284. - Fix a bug in OutboundBindAddress so it (hopefully) works.
  3285. - Fix a rare seg fault for people running hidden services on
  3286. intermittent connections.
  3287. - Fix a bug in parsing opt keywords with objects.
  3288. - Fix a stale pointer assert bug when a stream detaches and
  3289. reattaches.
  3290. - Fix a string format vulnerability (probably not exploitable)
  3291. in reporting stats locally.
  3292. - Fix an assert trigger: sometimes launching circuits can fail
  3293. immediately, e.g. because too many circuits have failed recently.
  3294. - Fix a compile warning on 64 bit platforms.
  3295. Changes in version 0.0.9pre2 - 2004-10-03
  3296. o Bugfixes:
  3297. - Make fetching a cached directory work for 64-bit platforms too.
  3298. - Make zlib.h a required header, not an optional header.
  3299. Changes in version 0.0.9pre1 - 2004-10-01
  3300. o Bugfixes:
  3301. - Stop using separate defaults for no-config-file and
  3302. empty-config-file. Now you have to explicitly turn off SocksPort,
  3303. if you don't want it open.
  3304. - Fix a bug in OutboundBindAddress so it (hopefully) works.
  3305. - Improve man page to mention more of the 0.0.8 features.
  3306. - Fix a rare seg fault for people running hidden services on
  3307. intermittent connections.
  3308. - Change our file IO stuff (especially wrt OpenSSL) so win32 is
  3309. happier.
  3310. - Fix more dns related bugs: send back resolve_failed and end cells
  3311. more reliably when the resolve fails, rather than closing the
  3312. circuit and then trying to send the cell. Also attach dummy resolve
  3313. connections to a circuit *before* calling dns_resolve(), to fix
  3314. a bug where cached answers would never be sent in RESOLVED cells.
  3315. - When we run out of disk space, or other log writing error, don't
  3316. crash. Just stop logging to that log and continue.
  3317. - We were starting to daemonize before we opened our logs, so if
  3318. there were any problems opening logs, we would complain to stderr,
  3319. which wouldn't work, and then mysteriously exit.
  3320. - Fix a rare bug where sometimes a verified OR would connect to us
  3321. before he'd uploaded his descriptor, which would cause us to
  3322. assign conn->nickname as though he's unverified. Now we look through
  3323. the fingerprint list to see if he's there.
  3324. - Fix a rare assert trigger, where routerinfos for entries in
  3325. our cpath would expire while we're building the path.
  3326. o Features:
  3327. - Clients can ask dirservers for /dir.z to get a compressed version
  3328. of the directory. Only works for servers running 0.0.9, of course.
  3329. - Make clients cache directories and use them to seed their router
  3330. lists at startup. This means clients have a datadir again.
  3331. - Configuration infrastructure support for warning on obsolete
  3332. options.
  3333. - Respond to content-encoding headers by trying to uncompress as
  3334. appropriate.
  3335. - Reply with a deflated directory when a client asks for "dir.z".
  3336. We could use allow-encodings instead, but allow-encodings isn't
  3337. specified in HTTP 1.0.
  3338. - Raise the max dns workers from 50 to 100.
  3339. - Discourage people from setting their dirfetchpostperiod more often
  3340. than once per minute.
  3341. - Protect dirservers from overzealous descriptor uploading -- wait
  3342. 10 seconds after directory gets dirty, before regenerating.
  3343. Changes in version 0.0.8 - 2004-08-25
  3344. o Port it to SunOS 5.9 / Athena
  3345. Changes in version 0.0.8rc2 - 2004-08-20
  3346. o Make it compile on cygwin again.
  3347. o When picking unverified routers, skip those with low uptime and/or
  3348. low bandwidth, depending on what properties you care about.
  3349. Changes in version 0.0.8rc1 - 2004-08-18
  3350. o Changes from 0.0.7.3:
  3351. - Bugfixes:
  3352. - Fix assert triggers: if the other side returns an address 0.0.0.0,
  3353. don't put it into the client dns cache.
  3354. - If a begin failed due to exit policy, but we believe the IP address
  3355. should have been allowed, switch that router to exitpolicy reject *:*
  3356. until we get our next directory.
  3357. - Features:
  3358. - Clients choose nodes proportional to advertised bandwidth.
  3359. - Avoid using nodes with low uptime as introduction points.
  3360. - Handle servers with dynamic IP addresses: don't replace
  3361. options->Address with the resolved one at startup, and
  3362. detect our address right before we make a routerinfo each time.
  3363. - 'FascistFirewall' option to pick dirservers and ORs on specific
  3364. ports; plus 'FirewallPorts' config option to tell FascistFirewall
  3365. which ports are open. (Defaults to 80,443)
  3366. - Be more aggressive about trying to make circuits when the network
  3367. has changed (e.g. when you unsuspend your laptop).
  3368. - Check for time skew on http headers; report date in response to
  3369. "GET /".
  3370. - If the entrynode config line has only one node, don't pick it as
  3371. an exitnode.
  3372. - Add strict{entry|exit}nodes config options. If set to 1, then
  3373. we refuse to build circuits that don't include the specified entry
  3374. or exit nodes.
  3375. - OutboundBindAddress config option, to bind to a specific
  3376. IP address for outgoing connect()s.
  3377. - End truncated log entries (e.g. directories) with "[truncated]".
  3378. o Patches to 0.0.8preX:
  3379. - Bugfixes:
  3380. - Patches to compile and run on win32 again (maybe)?
  3381. - Fix crash when looking for ~/.torrc with no $HOME set.
  3382. - Fix a race bug in the unit tests.
  3383. - Handle verified/unverified name collisions better when new
  3384. routerinfo's arrive in a directory.
  3385. - Sometimes routers were getting entered into the stats before
  3386. we'd assigned their identity_digest. Oops.
  3387. - Only pick and establish intro points after we've gotten a
  3388. directory.
  3389. - Features:
  3390. - AllowUnverifiedNodes config option to let circuits choose no-name
  3391. routers in entry,middle,exit,introduction,rendezvous positions.
  3392. Allow middle and rendezvous positions by default.
  3393. - Add a man page for tor-resolve.
  3394. Changes in version 0.0.7.3 - 2004-08-12
  3395. o Stop dnsworkers from triggering an assert failure when you
  3396. ask them to resolve the host "".
  3397. Changes in version 0.0.8pre3 - 2004-08-09
  3398. o Changes from 0.0.7.2:
  3399. - Allow multiple ORs with same nickname in routerlist -- now when
  3400. people give us one identity key for a nickname, then later
  3401. another, we don't constantly complain until the first expires.
  3402. - Remember used bandwidth (both in and out), and publish 15-minute
  3403. snapshots for the past day into our descriptor.
  3404. - You can now fetch $DIRURL/running-routers to get just the
  3405. running-routers line, not the whole descriptor list. (But
  3406. clients don't use this yet.)
  3407. - When people mistakenly use Tor as an http proxy, point them
  3408. at the tor-doc.html rather than the INSTALL.
  3409. - Remove our mostly unused -- and broken -- hex_encode()
  3410. function. Use base16_encode() instead. (Thanks to Timo Lindfors
  3411. for pointing out this bug.)
  3412. - Rotate onion keys every 12 hours, not every 2 hours, so we have
  3413. fewer problems with people using the wrong key.
  3414. - Change the default exit policy to reject the default edonkey,
  3415. kazaa, gnutella ports.
  3416. - Add replace_file() to util.[ch] to handle win32's rename().
  3417. o Changes from 0.0.8preX:
  3418. - Fix two bugs in saving onion keys to disk when rotating, so
  3419. hopefully we'll get fewer people using old onion keys.
  3420. - Fix an assert error that was making SocksPolicy not work.
  3421. - Be willing to expire routers that have an open dirport -- it's
  3422. just the authoritative dirservers we want to not forget.
  3423. - Reject tor-resolve requests for .onion addresses early, so we
  3424. don't build a whole rendezvous circuit and then fail.
  3425. - When you're warning a server that he's unverified, don't cry
  3426. wolf unpredictably.
  3427. - Fix a race condition: don't try to extend onto a connection
  3428. that's still handshaking.
  3429. - For servers in clique mode, require the conn to be open before
  3430. you'll choose it for your path.
  3431. - Fix some cosmetic bugs about duplicate mark-for-close, lack of
  3432. end relay cell, etc.
  3433. - Measure bandwidth capacity over the last 24 hours, not just 12
  3434. - Bugfix: authoritative dirservers were making and signing a new
  3435. directory for each client, rather than reusing the cached one.
  3436. Changes in version 0.0.8pre2 - 2004-08-04
  3437. o Changes from 0.0.7.2:
  3438. - Security fixes:
  3439. - Check directory signature _before_ you decide whether you're
  3440. you're running an obsolete version and should exit.
  3441. - Check directory signature _before_ you parse the running-routers
  3442. list to decide who's running or verified.
  3443. - Bugfixes and features:
  3444. - Check return value of fclose while writing to disk, so we don't
  3445. end up with broken files when servers run out of disk space.
  3446. - Log a warning if the user uses an unsafe socks variant, so people
  3447. are more likely to learn about privoxy or socat.
  3448. - Dirservers now include RFC1123-style dates in the HTTP headers,
  3449. which one day we will use to better detect clock skew.
  3450. o Changes from 0.0.8pre1:
  3451. - Make it compile without warnings again on win32.
  3452. - Log a warning if you're running an unverified server, to let you
  3453. know you might want to get it verified.
  3454. - Only pick a default nickname if you plan to be a server.
  3455. Changes in version 0.0.8pre1 - 2004-07-23
  3456. o Bugfixes:
  3457. - Made our unit tests compile again on OpenBSD 3.5, and tor
  3458. itself compile again on OpenBSD on a sparc64.
  3459. - We were neglecting milliseconds when logging on win32, so
  3460. everything appeared to happen at the beginning of each second.
  3461. o Protocol changes:
  3462. - 'Extend' relay cell payloads now include the digest of the
  3463. intended next hop's identity key. Now we can verify that we're
  3464. extending to the right router, and also extend to routers we
  3465. hadn't heard of before.
  3466. o Features:
  3467. - Tor nodes can now act as relays (with an advertised ORPort)
  3468. without being manually verified by the dirserver operators.
  3469. - Uploaded descriptors of unverified routers are now accepted
  3470. by the dirservers, and included in the directory.
  3471. - Verified routers are listed by nickname in the running-routers
  3472. list; unverified routers are listed as "$<fingerprint>".
  3473. - We now use hash-of-identity-key in most places rather than
  3474. nickname or addr:port, for improved security/flexibility.
  3475. - To avoid Sybil attacks, paths still use only verified servers.
  3476. But now we have a chance to play around with hybrid approaches.
  3477. - Nodes track bandwidth usage to estimate capacity (not used yet).
  3478. - ClientOnly option for nodes that never want to become servers.
  3479. - Directory caching.
  3480. - "AuthoritativeDir 1" option for the official dirservers.
  3481. - Now other nodes (clients and servers) will cache the latest
  3482. directory they've pulled down.
  3483. - They can enable their DirPort to serve it to others.
  3484. - Clients will pull down a directory from any node with an open
  3485. DirPort, and check the signature/timestamp correctly.
  3486. - Authoritative dirservers now fetch directories from other
  3487. authdirservers, to stay better synced.
  3488. - Running-routers list tells who's down also, along with noting
  3489. if they're verified (listed by nickname) or unverified (listed
  3490. by hash-of-key).
  3491. - Allow dirservers to serve running-router list separately.
  3492. This isn't used yet.
  3493. - ORs connect-on-demand to other ORs
  3494. - If you get an extend cell to an OR you're not connected to,
  3495. connect, handshake, and forward the create cell.
  3496. - The authoritative dirservers stay connected to everybody,
  3497. and everybody stays connected to 0.0.7 servers, but otherwise
  3498. clients/servers expire unused connections after 5 minutes.
  3499. - When servers get a sigint, they delay 30 seconds (refusing new
  3500. connections) then exit. A second sigint causes immediate exit.
  3501. - File and name management:
  3502. - Look for .torrc if no CONFDIR "torrc" is found.
  3503. - If no datadir is defined, then choose, make, and secure ~/.tor
  3504. as datadir.
  3505. - If torrc not found, exitpolicy reject *:*.
  3506. - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
  3507. - If no nickname is defined, derive default from hostname.
  3508. - Rename secret key files, e.g. identity.key -> secret_id_key,
  3509. to discourage people from mailing their identity key to tor-ops.
  3510. - Refuse to build a circuit before the directory has arrived --
  3511. it won't work anyway, since you won't know the right onion keys
  3512. to use.
  3513. - Try other dirservers immediately if the one you try is down. This
  3514. should tolerate down dirservers better now.
  3515. - Parse tor version numbers so we can do an is-newer-than check
  3516. rather than an is-in-the-list check.
  3517. - New socks command 'resolve', to let us shim gethostbyname()
  3518. locally.
  3519. - A 'tor_resolve' script to access the socks resolve functionality.
  3520. - A new socks-extensions.txt doc file to describe our
  3521. interpretation and extensions to the socks protocols.
  3522. - Add a ContactInfo option, which gets published in descriptor.
  3523. - Publish OR uptime in descriptor (and thus in directory) too.
  3524. - Write tor version at the top of each log file
  3525. - New docs in the tarball:
  3526. - tor-doc.html.
  3527. - Document that you should proxy your SSL traffic too.
  3528. Changes in version 0.0.7.2 - 2004-07-07
  3529. o A better fix for the 0.0.0.0 problem, that will hopefully
  3530. eliminate the remaining related assertion failures.
  3531. Changes in version 0.0.7.1 - 2004-07-04
  3532. o When an address resolves to 0.0.0.0, treat it as a failed resolve,
  3533. since internally we use 0.0.0.0 to signify "not yet resolved".
  3534. Changes in version 0.0.7 - 2004-06-07
  3535. o Updated the man page to reflect the new features.
  3536. Changes in version 0.0.7rc2 - 2004-06-06
  3537. o Changes from 0.0.7rc1:
  3538. - Make it build on Win32 again.
  3539. o Changes from 0.0.6.2:
  3540. - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
  3541. settings too.
  3542. Changes in version 0.0.7rc1 - 2004-06-02
  3543. o Bugfixes:
  3544. - On sighup, we were adding another log without removing the first
  3545. one. So log messages would get duplicated n times for n sighups.
  3546. - Several cases of using a connection after we'd freed it. The
  3547. problem was that connections that are pending resolve are in both
  3548. the pending_resolve tree, and also the circuit's resolving_streams
  3549. list. When you want to remove one, you must remove it from both.
  3550. - Fix a double-mark-for-close where an end cell arrived for a
  3551. resolving stream, and then the resolve failed.
  3552. - Check directory signatures based on name of signer, not on whom
  3553. we got the directory from. This will let us cache directories more
  3554. easily.
  3555. o Features:
  3556. - Crank up some of our constants to handle more users.
  3557. Changes in version 0.0.7pre1 - 2004-06-02
  3558. o Fixes for crashes and other obnoxious bugs:
  3559. - Fix an epipe bug: sometimes when directory connections failed
  3560. to connect, we would give them a chance to flush before closing
  3561. them.
  3562. - When we detached from a circuit because of resolvefailed, we
  3563. would immediately try the same circuit twice more, and then
  3564. give up on the resolve thinking we'd tried three different
  3565. exit nodes.
  3566. - Limit the number of intro circuits we'll attempt to build for a
  3567. hidden service per 15-minute period.
  3568. - Check recommended-software string *early*, before actually parsing
  3569. the directory. Thus we can detect an obsolete version and exit,
  3570. even if the new directory format doesn't parse.
  3571. o Fixes for security bugs:
  3572. - Remember which nodes are dirservers when you startup, and if a
  3573. random OR enables his dirport, don't automatically assume he's
  3574. a trusted dirserver.
  3575. o Other bugfixes:
  3576. - Directory connections were asking the wrong poll socket to
  3577. start writing, and not asking themselves to start writing.
  3578. - When we detached from a circuit because we sent a begin but
  3579. didn't get a connected, we would use it again the first time;
  3580. but after that we would correctly switch to a different one.
  3581. - Stop warning when the first onion decrypt attempt fails; they
  3582. will sometimes legitimately fail now that we rotate keys.
  3583. - Override unaligned-access-ok check when $host_cpu is ia64 or
  3584. arm. Apparently they allow it but the kernel whines.
  3585. - Dirservers try to reconnect periodically too, in case connections
  3586. have failed.
  3587. - Fix some memory leaks in directory servers.
  3588. - Allow backslash in Win32 filenames.
  3589. - Made Tor build complain-free on FreeBSD, hopefully without
  3590. breaking other BSD builds. We'll see.
  3591. o Features:
  3592. - Doxygen markup on all functions and global variables.
  3593. - Make directory functions update routerlist, not replace it. So
  3594. now directory disagreements are not so critical a problem.
  3595. - Remove the upper limit on number of descriptors in a dirserver's
  3596. directory (not that we were anywhere close).
  3597. - Allow multiple logfiles at different severity ranges.
  3598. - Allow *BindAddress to specify ":port" rather than setting *Port
  3599. separately. Allow multiple instances of each BindAddress config
  3600. option, so you can bind to multiple interfaces if you want.
  3601. - Allow multiple exit policy lines, which are processed in order.
  3602. Now we don't need that huge line with all the commas in it.
  3603. - Enable accept/reject policies on SOCKS connections, so you can bind
  3604. to 0.0.0.0 but still control who can use your OP.
  3605. Changes in version 0.0.6.2 - 2004-05-16
  3606. o Our integrity-checking digest was checking only the most recent cell,
  3607. not the previous cells like we'd thought.
  3608. Thanks to Stefan Mark for finding the flaw!
  3609. Changes in version 0.0.6.1 - 2004-05-06
  3610. o Fix two bugs in our AES counter-mode implementation (this affected
  3611. onion-level stream encryption, but not TLS-level). It turns
  3612. out we were doing something much more akin to a 16-character
  3613. polyalphabetic cipher. Oops.
  3614. Thanks to Stefan Mark for finding the flaw!
  3615. o Retire moria3 as a directory server, and add tor26 as a directory
  3616. server.
  3617. Changes in version 0.0.6 - 2004-05-02
  3618. [version bump only]
  3619. Changes in version 0.0.6rc4 - 2004-05-01
  3620. o Update the built-in dirservers list to use the new directory format
  3621. o Fix a rare seg fault: if a node offering a hidden service attempts
  3622. to build a circuit to Alice's rendezvous point and fails before it
  3623. reaches the last hop, it retries with a different circuit, but
  3624. then dies.
  3625. o Handle windows socket errors correctly.
  3626. Changes in version 0.0.6rc3 - 2004-04-28
  3627. o Don't expire non-general excess circuits (if we had enough
  3628. circuits open, we were expiring rendezvous circuits -- even
  3629. when they had a stream attached. oops.)
  3630. o Fetch randomness from /dev/urandom better (not via fopen/fread)
  3631. o Better debugging for tls errors
  3632. o Some versions of openssl have an SSL_pending function that erroneously
  3633. returns bytes when there is a non-application record pending.
  3634. o Set Content-Type on the directory and hidserv descriptor.
  3635. o Remove IVs from cipher code, since AES-ctr has none.
  3636. o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
  3637. o We were using an array of length zero in a few places.
  3638. o win32's gethostbyname can't resolve an IP to an IP.
  3639. o win32's close can't close a socket.
  3640. Changes in version 0.0.6rc2 - 2004-04-26
  3641. o Fix a bug where we were closing tls connections intermittently.
  3642. It turns out openssl keeps its errors around -- so if an error
  3643. happens, and you don't ask about it, and then another openssl
  3644. operation happens and succeeds, and you ask if there was an error,
  3645. it tells you about the first error. Fun fun.
  3646. o Fix a bug that's been lurking since 27 may 03 (!)
  3647. When passing back a destroy cell, we would use the wrong circ id.
  3648. 'Mostly harmless', but still worth fixing.
  3649. o Since we don't support truncateds much, don't bother sending them;
  3650. just close the circ.
  3651. o check for <machine/limits.h> so we build on NetBSD again (I hope).
  3652. o don't crash if a conn that sent a begin has suddenly lost its circuit
  3653. (this was quite rare).
  3654. Changes in version 0.0.6rc1 - 2004-04-25
  3655. o We now rotate link (tls context) keys and onion keys.
  3656. o CREATE cells now include oaep padding, so you can tell
  3657. if you decrypted them correctly.
  3658. o Add bandwidthburst to server descriptor.
  3659. o Directories now say which dirserver signed them.
  3660. o Use a tor_assert macro that logs failed assertions too.
  3661. Changes in version 0.0.6pre5 - 2004-04-18
  3662. o changes from 0.0.6pre4:
  3663. - make tor build on broken freebsd 5.2 installs
  3664. - fix a failed assert when you try an intro point, get a nack, and try
  3665. a second one and it works.
  3666. - when alice uses a port that the hidden service doesn't accept,
  3667. it now sends back an end cell (denied by exit policy). otherwise
  3668. alice would just have to wait to time out.
  3669. - fix another rare bug: when we had tried all the intro
  3670. points for a hidden service, we fetched the descriptor
  3671. again, but we left our introcirc thinking it had already
  3672. sent an intro, so it kept waiting for a response...
  3673. - bugfix: when you sleep your hidden-service laptop, as soon
  3674. as it wakes up it tries to upload a service descriptor, but
  3675. socketpair fails for some reason (localhost not up yet?).
  3676. now we simply give up on that upload, and we'll try again later.
  3677. i'd still like to find the bug though.
  3678. - if an intro circ waiting for an ack dies before getting one, then
  3679. count it as a nack
  3680. - we were reusing stale service descriptors and refetching usable
  3681. ones. oops.
  3682. Changes in version 0.0.6pre4 - 2004-04-14
  3683. o changes from 0.0.6pre3:
  3684. - when bob fails to connect to the rendezvous point, and his
  3685. circ didn't fail because of the rendezvous point itself, then
  3686. he retries a couple of times
  3687. - we expire introduction and rendezvous circs more thoroughly
  3688. (sometimes they were hanging around forever)
  3689. - we expire unattached rendezvous streams that have been around
  3690. too long (they were sticking around forever).
  3691. - fix a measly fencepost error that was crashing everybody with
  3692. a strict glibc.
  3693. Changes in version 0.0.6pre3 - 2004-04-14
  3694. o changes from 0.0.6pre2:
  3695. - make hup work again
  3696. - fix some memory leaks for dirservers
  3697. - allow more skew in rendezvous descriptor timestamps, to help
  3698. handle people like blanu who don't know what time it is
  3699. - normal circs are 3 hops, but some rend/intro circs are 4, if
  3700. the initiator doesn't get to choose the last hop
  3701. - send acks for introductions, so alice can know whether to try
  3702. again
  3703. - bob publishes intro points more correctly
  3704. o changes from 0.0.5:
  3705. - fix an assert trigger that's been plaguing us since the days
  3706. of 0.0.2prexx (thanks weasel!)
  3707. - retry stream correctly when we fail to connect because of
  3708. exit-policy-reject (should try another) or can't-resolve-address
  3709. (also should try another, because dns on random internet servers
  3710. is flaky).
  3711. - when we hup a dirserver and we've *removed* a server from the
  3712. approved-routers list, now we remove that server from the
  3713. in-memory directories too
  3714. Changes in version 0.0.6pre2 - 2004-04-08
  3715. o We fixed our base32 implementation. Now it works on all architectures.
  3716. Changes in version 0.0.6pre1 - 2004-04-08
  3717. o Features:
  3718. - Hidden services and rendezvous points are implemented. Go to
  3719. http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
  3720. hidden services. (This only works via a socks4a proxy such as
  3721. Privoxy, and currently it's quite slow.)
  3722. Changes in version 0.0.5 - 2004-03-30
  3723. [version bump only]
  3724. Changes in version 0.0.5rc3 - 2004-03-29
  3725. o Install torrc as torrc.sample -- we no longer clobber your
  3726. torrc. (Woo!)
  3727. o Re-enable recommendedversion checking (we broke it in rc2, oops)
  3728. o Add in a 'notice' log level for things the operator should hear
  3729. but that aren't warnings
  3730. Changes in version 0.0.5rc2 - 2004-03-29
  3731. o Hold socks connection open until reply is flushed (if possible)
  3732. o Make exit nodes resolve IPs to IPs immediately, rather than asking
  3733. the dns farm to do it.
  3734. o Fix c99 aliasing warnings in rephist.c
  3735. o Don't include server descriptors that are older than 24 hours in the
  3736. directory.
  3737. o Give socks 'reject' replies their whole 15s to attempt to flush,
  3738. rather than seeing the 60s timeout and assuming the flush had failed.
  3739. o Clean automake droppings from the cvs repository
  3740. Changes in version 0.0.5rc1 - 2004-03-28
  3741. o Fix mangled-state bug in directory fetching (was causing sigpipes).
  3742. o Only build circuits after we've fetched the directory: clients were
  3743. using only the directory servers before they'd fetched a directory.
  3744. This also means longer startup time; so it goes.
  3745. o Fix an assert trigger where an OP would fail to handshake, and we'd
  3746. expect it to have a nickname.
  3747. o Work around a tsocks bug: do a socks reject when AP connection dies
  3748. early, else tsocks goes into an infinite loop.
  3749. Changes in version 0.0.4 - 2004-03-26
  3750. o When connecting to a dirserver or OR and the network is down,
  3751. we would crash.
  3752. Changes in version 0.0.3 - 2004-03-26
  3753. o Warn and fail if server chose a nickname with illegal characters
  3754. o Port to Solaris and Sparc:
  3755. - include missing header fcntl.h
  3756. - have autoconf find -lsocket -lnsl automatically
  3757. - deal with hardware word alignment
  3758. - make uname() work (solaris has a different return convention)
  3759. - switch from using signal() to sigaction()
  3760. o Preliminary work on reputation system:
  3761. - Keep statistics on success/fail of connect attempts; they're published
  3762. by kill -USR1 currently.
  3763. - Add a RunTesting option to try to learn link state by creating test
  3764. circuits, even when SocksPort is off.
  3765. - Remove unused open circuits when there are too many.
  3766. Changes in version 0.0.2 - 2004-03-19
  3767. - Include strlcpy and strlcat for safer string ops
  3768. - define INADDR_NONE so we compile (but still not run) on solaris
  3769. Changes in version 0.0.2pre27 - 2004-03-14
  3770. o Bugfixes:
  3771. - Allow internal tor networks (we were rejecting internal IPs,
  3772. now we allow them if they're set explicitly).
  3773. - And fix a few endian issues.
  3774. Changes in version 0.0.2pre26 - 2004-03-14
  3775. o New features:
  3776. - If a stream times out after 15s without a connected cell, don't
  3777. try that circuit again: try a new one.
  3778. - Retry streams at most 4 times. Then give up.
  3779. - When a dirserver gets a descriptor from an unknown router, it
  3780. logs its fingerprint (so the dirserver operator can choose to
  3781. accept it even without mail from the server operator).
  3782. - Inform unapproved servers when we reject their descriptors.
  3783. - Make tor build on Windows again. It works as a client, who knows
  3784. about as a server.
  3785. - Clearer instructions in the torrc for how to set up a server.
  3786. - Be more efficient about reading fd's when our global token bucket
  3787. (used for rate limiting) becomes empty.
  3788. o Bugfixes:
  3789. - Stop asserting that computers always go forward in time. It's
  3790. simply not true.
  3791. - When we sent a cell (e.g. destroy) and then marked an OR connection
  3792. expired, we might close it before finishing a flush if the other
  3793. side isn't reading right then.
  3794. - Don't allow dirservers to start if they haven't defined
  3795. RecommendedVersions
  3796. - We were caching transient dns failures. Oops.
  3797. - Prevent servers from publishing an internal IP as their address.
  3798. - Address a strcat vulnerability in circuit.c
  3799. Changes in version 0.0.2pre25 - 2004-03-04
  3800. o New features:
  3801. - Put the OR's IP in its router descriptor, not its fqdn. That way
  3802. we'll stop being stalled by gethostbyname for nodes with flaky dns,
  3803. e.g. poblano.
  3804. o Bugfixes:
  3805. - If the user typed in an address that didn't resolve, the server
  3806. crashed.
  3807. Changes in version 0.0.2pre24 - 2004-03-03
  3808. o Bugfixes:
  3809. - Fix an assertion failure in dns.c, where we were trying to dequeue
  3810. a pending dns resolve even if it wasn't pending
  3811. - Fix a spurious socks5 warning about still trying to write after the
  3812. connection is finished.
  3813. - Hold certain marked_for_close connections open until they're finished
  3814. flushing, rather than losing bytes by closing them too early.
  3815. - Correctly report the reason for ending a stream
  3816. - Remove some duplicate calls to connection_mark_for_close
  3817. - Put switch_id and start_daemon earlier in the boot sequence, so it
  3818. will actually try to chdir() to options.DataDirectory
  3819. - Make 'make test' exit(1) if a test fails; fix some unit tests
  3820. - Make tor fail when you use a config option it doesn't know about,
  3821. rather than warn and continue.
  3822. - Make --version work
  3823. - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
  3824. Changes in version 0.0.2pre23 - 2004-02-29
  3825. o New features:
  3826. - Print a statement when the first circ is finished, so the user
  3827. knows it's working.
  3828. - If a relay cell is unrecognized at the end of the circuit,
  3829. send back a destroy. (So attacks to mutate cells are more
  3830. clearly thwarted.)
  3831. - New config option 'excludenodes' to avoid certain nodes for circuits.
  3832. - When it daemonizes, it chdir's to the DataDirectory rather than "/",
  3833. so you can collect coredumps there.
  3834. o Bugfixes:
  3835. - Fix a bug in tls flushing where sometimes data got wedged and
  3836. didn't flush until more data got sent. Hopefully this bug was
  3837. a big factor in the random delays we were seeing.
  3838. - Make 'connected' cells include the resolved IP, so the client
  3839. dns cache actually gets populated.
  3840. - Disallow changing from ORPort=0 to ORPort>0 on hup.
  3841. - When we time-out on a stream and detach from the circuit, send an
  3842. end cell down it first.
  3843. - Only warn about an unknown router (in exitnodes, entrynodes,
  3844. excludenodes) after we've fetched a directory.
  3845. Changes in version 0.0.2pre22 - 2004-02-26
  3846. o New features:
  3847. - Servers publish less revealing uname information in descriptors.
  3848. - More memory tracking and assertions, to crash more usefully when
  3849. errors happen.
  3850. - If the default torrc isn't there, just use some default defaults.
  3851. Plus provide an internal dirservers file if they don't have one.
  3852. - When the user tries to use Tor as an http proxy, give them an http
  3853. 501 failure explaining that we're a socks proxy.
  3854. - Dump a new router.desc on hup, to help confused people who change
  3855. their exit policies and then wonder why router.desc doesn't reflect
  3856. it.
  3857. - Clean up the generic tor.sh init script that we ship with.
  3858. o Bugfixes:
  3859. - If the exit stream is pending on the resolve, and a destroy arrives,
  3860. then the stream wasn't getting removed from the pending list. I
  3861. think this was the one causing recent server crashes.
  3862. - Use a more robust poll on OSX 10.3, since their poll is flaky.
  3863. - When it couldn't resolve any dirservers, it was useless from then on.
  3864. Now it reloads the RouterFile (or default dirservers) if it has no
  3865. dirservers.
  3866. - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
  3867. many users don't even *have* a /usr/local/sbin/.
  3868. Changes in version 0.0.2pre21 - 2004-02-18
  3869. o New features:
  3870. - There's a ChangeLog file that actually reflects the changelog.
  3871. - There's a 'torify' wrapper script, with an accompanying
  3872. tor-tsocks.conf, that simplifies the process of using tsocks for
  3873. tor. It even has a man page.
  3874. - The tor binary gets installed to sbin rather than bin now.
  3875. - Retry streams where the connected cell hasn't arrived in 15 seconds
  3876. - Clean up exit policy handling -- get the default out of the torrc,
  3877. so we can update it without forcing each server operator to fix
  3878. his/her torrc.
  3879. - Allow imaps and pop3s in default exit policy
  3880. o Bugfixes:
  3881. - Prevent picking middleman nodes as the last node in the circuit
  3882. Changes in version 0.0.2pre20 - 2004-01-30
  3883. o New features:
  3884. - We now have a deb package, and it's in debian unstable. Go to
  3885. it, apt-getters. :)
  3886. - I've split the TotalBandwidth option into BandwidthRate (how many
  3887. bytes per second you want to allow, long-term) and
  3888. BandwidthBurst (how many bytes you will allow at once before the cap
  3889. kicks in). This better token bucket approach lets you, say, set
  3890. BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
  3891. performance while not exceeding your monthly bandwidth quota.
  3892. - Push out a tls record's worth of data once you've got it, rather
  3893. than waiting until you've read everything waiting to be read. This
  3894. may improve performance by pipelining better. We'll see.
  3895. - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
  3896. from failed circuits (if they haven't been connected yet) and attach
  3897. to new ones.
  3898. - Expire old streams that haven't managed to connect. Some day we'll
  3899. have them reattach to new circuits instead.
  3900. o Bugfixes:
  3901. - Fix several memory leaks that were causing servers to become bloated
  3902. after a while.
  3903. - Fix a few very rare assert triggers. A few more remain.
  3904. - Setuid to User _before_ complaining about running as root.
  3905. Changes in version 0.0.2pre19 - 2004-01-07
  3906. o Bugfixes:
  3907. - Fix deadlock condition in dns farm. We were telling a child to die by
  3908. closing the parent's file descriptor to him. But newer children were
  3909. inheriting the open file descriptor from the parent, and since they
  3910. weren't closing it, the socket never closed, so the child never read
  3911. eof, so he never knew to exit. Similarly, dns workers were holding
  3912. open other sockets, leading to all sorts of chaos.
  3913. - New cleaner daemon() code for forking and backgrounding.
  3914. - If you log to a file, it now prints an entry at the top of the
  3915. logfile so you know it's working.
  3916. - The onionskin challenge length was 30 bytes longer than necessary.
  3917. - Started to patch up the spec so it's not quite so out of date.
  3918. Changes in version 0.0.2pre18 - 2004-01-02
  3919. o Bugfixes:
  3920. - Fix endian issues with the 'integrity' field in the relay header.
  3921. - Fix a potential bug where connections in state
  3922. AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
  3923. Changes in version 0.0.2pre17 - 2003-12-30
  3924. o Bugfixes:
  3925. - Made --debuglogfile (or any second log file, actually) work.
  3926. - Resolved an edge case in get_unique_circ_id_by_conn where a smart
  3927. adversary could force us into an infinite loop.
  3928. o Features:
  3929. - Each onionskin handshake now includes a hash of the computed key,
  3930. to prove the server's identity and help perfect forward secrecy.
  3931. - Changed cell size from 256 to 512 bytes (working toward compatibility
  3932. with MorphMix).
  3933. - Changed cell length to 2 bytes, and moved it to the relay header.
  3934. - Implemented end-to-end integrity checking for the payloads of
  3935. relay cells.
  3936. - Separated streamid from 'recognized' (otherwise circuits will get
  3937. messed up when we try to have streams exit from the middle). We
  3938. use the integrity-checking to confirm that a cell is addressed to
  3939. this hop.
  3940. - Randomize the initial circid and streamid values, so an adversary who
  3941. breaks into a node can't learn how many circuits or streams have
  3942. been made so far.
  3943. Changes in version 0.0.2pre16 - 2003-12-14
  3944. o Bugfixes:
  3945. - Fixed a bug that made HUP trigger an assert
  3946. - Fixed a bug where a circuit that immediately failed wasn't being
  3947. counted as a failed circuit in counting retries.
  3948. o Features:
  3949. - Now we close the circuit when we get a truncated cell: otherwise we're
  3950. open to an anonymity attack where a bad node in the path truncates
  3951. the circuit and then we open streams at him.
  3952. - Add port ranges to exit policies
  3953. - Add a conservative default exit policy
  3954. - Warn if you're running tor as root
  3955. - on HUP, retry OR connections and close/rebind listeners
  3956. - options.EntryNodes: try these nodes first when picking the first node
  3957. - options.ExitNodes: if your best choices happen to include any of
  3958. your preferred exit nodes, you choose among just those preferred
  3959. exit nodes.
  3960. - options.ExcludedNodes: nodes that are never picked in path building
  3961. Changes in version 0.0.2pre15 - 2003-12-03
  3962. o Robustness and bugfixes:
  3963. - Sometimes clients would cache incorrect DNS resolves, which would
  3964. really screw things up.
  3965. - An OP that goes offline would slowly leak all its sockets and stop
  3966. working.
  3967. - A wide variety of bugfixes in exit node selection, exit policy
  3968. handling, and processing pending streams when a new circuit is
  3969. established.
  3970. - Pick nodes for a path only from those the directory says are up
  3971. - Choose randomly from all running dirservers, not always the first one
  3972. - Increase allowed http header size for directory fetch.
  3973. - Stop writing to stderr (if we're daemonized it will be closed).
  3974. - Enable -g always, so cores will be more useful to me.
  3975. - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
  3976. o Documentation:
  3977. - Wrote a man page. It lists commonly used options.
  3978. o Configuration:
  3979. - Change default loglevel to warn.
  3980. - Make PidFile default to null rather than littering in your CWD.
  3981. - OnionRouter config option is now obsolete. Instead it just checks
  3982. ORPort>0.
  3983. - Moved to a single unified torrc file for both clients and servers.
  3984. Changes in version 0.0.2pre14 - 2003-11-29
  3985. o Robustness and bugfixes:
  3986. - Force the admin to make the DataDirectory himself
  3987. - to get ownership/permissions right
  3988. - so clients no longer make a DataDirectory and then never use it
  3989. - fix bug where a client who was offline for 45 minutes would never
  3990. pull down a directory again
  3991. - fix (or at least hide really well) the dns assert bug that was
  3992. causing server crashes
  3993. - warnings and improved robustness wrt clockskew for certs
  3994. - use the native daemon(3) to daemonize, when available
  3995. - exit if bind() fails
  3996. - exit if neither socksport nor orport is defined
  3997. - include our own tor_timegm (Win32 doesn't have its own)
  3998. - bugfix for win32 with lots of connections
  3999. - fix minor bias in PRNG
  4000. - make dirserver more robust to corrupt cached directory
  4001. o Documentation:
  4002. - Wrote the design document (woo)
  4003. o Circuit building and exit policies:
  4004. - Circuits no longer try to use nodes that the directory has told them
  4005. are down.
  4006. - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
  4007. bitcounts (18.0.0.0/8).
  4008. - Make AP connections standby for a circuit if no suitable circuit
  4009. exists, rather than failing
  4010. - Circuits choose exit node based on addr/port, exit policies, and
  4011. which AP connections are standing by
  4012. - Bump min pathlen from 2 to 3
  4013. - Relay end cells have a payload to describe why the stream ended.
  4014. - If the stream failed because of exit policy, try again with a new
  4015. circuit.
  4016. - Clients have a dns cache to remember resolved addresses.
  4017. - Notice more quickly when we have no working circuits
  4018. o Configuration:
  4019. - APPort is now called SocksPort
  4020. - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
  4021. where to bind
  4022. - RecommendedVersions is now a config variable rather than
  4023. hardcoded (for dirservers)
  4024. - Reloads config on HUP
  4025. - Usage info on -h or --help
  4026. - If you set User and Group config vars, it'll setu/gid to them.
  4027. Changes in version 0.0.2pre13 - 2003-10-19
  4028. o General stability:
  4029. - SSL_write no longer fails when it returns WANTWRITE and the number
  4030. of bytes in the buf has changed by the next SSL_write call.
  4031. - Fix segfault fetching directory when network is down
  4032. - Fix a variety of minor memory leaks
  4033. - Dirservers reload the fingerprints file on HUP, so I don't have
  4034. to take down the network when I approve a new router
  4035. - Default server config file has explicit Address line to specify fqdn
  4036. o Buffers:
  4037. - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
  4038. - Make listener connections not ever alloc bufs
  4039. o Autoconf improvements:
  4040. - don't clobber an external CFLAGS in ./configure
  4041. - Make install now works
  4042. - create var/lib/tor on make install
  4043. - autocreate a tor.sh initscript to help distribs
  4044. - autocreate the torrc and sample-server-torrc with correct paths
  4045. o Log files and Daemonizing now work:
  4046. - If --DebugLogFile is specified, log to it at -l debug
  4047. - If --LogFile is specified, use it instead of commandline
  4048. - If --RunAsDaemon is set, tor forks and backgrounds on startup