ReleaseNotes 118 KB

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  1. This document summarizes new features and bugfixes in each stable release
  2. of Tor. If you want to see more detailed descriptions of the changes in
  3. each development snapshot, see the ChangeLog file.
  4. Changes in version 0.1.1.26 - 2006-12-14
  5. o Security bugfixes:
  6. - Stop sending the HttpProxyAuthenticator string to directory
  7. servers when directory connections are tunnelled through Tor.
  8. - Clients no longer store bandwidth history in the state file.
  9. - Do not log introduction points for hidden services if SafeLogging
  10. is set.
  11. o Minor bugfixes:
  12. - Fix an assert failure when a directory authority sets
  13. AuthDirRejectUnlisted and then receives a descriptor from an
  14. unlisted router (reported by seeess).
  15. Changes in version 0.1.1.25 - 2006-11-04
  16. o Major bugfixes:
  17. - When a client asks us to resolve (rather than connect to)
  18. an address, and we have a cached answer, give them the cached
  19. answer. Previously, we would give them no answer at all.
  20. - We were building exactly the wrong circuits when we predict
  21. hidden service requirements, meaning Tor would have to build all
  22. its circuits on demand.
  23. - If none of our live entry guards have a high uptime, but we
  24. require a guard with a high uptime, try adding a new guard before
  25. we give up on the requirement. This patch should make long-lived
  26. connections more stable on average.
  27. - When testing reachability of our DirPort, don't launch new
  28. tests when there's already one in progress -- unreachable
  29. servers were stacking up dozens of testing streams.
  30. o Security bugfixes:
  31. - When the user sends a NEWNYM signal, clear the client-side DNS
  32. cache too. Otherwise we continue to act on previous information.
  33. o Minor bugfixes:
  34. - Avoid a memory corruption bug when creating a hash table for
  35. the first time.
  36. - Avoid possibility of controller-triggered crash when misusing
  37. certain commands from a v0 controller on platforms that do not
  38. handle printf("%s",NULL) gracefully.
  39. - Avoid infinite loop on unexpected controller input.
  40. - Don't log spurious warnings when we see a circuit close reason we
  41. don't recognize; it's probably just from a newer version of Tor.
  42. - Add Vidalia to the OS X uninstaller script, so when we uninstall
  43. Tor/Privoxy we also uninstall Vidalia.
  44. Changes in version 0.1.1.24 - 2006-09-29
  45. o Major bugfixes:
  46. - Allow really slow clients to not hang up five minutes into their
  47. directory downloads (suggested by Adam J. Richter).
  48. - Fix major performance regression from 0.1.0.x: instead of checking
  49. whether we have enough directory information every time we want to
  50. do something, only check when the directory information has changed.
  51. This should improve client CPU usage by 25-50%.
  52. - Don't crash if, after a server has been running for a while,
  53. it can't resolve its hostname.
  54. - When a client asks us to resolve (not connect to) an address,
  55. and we have a cached answer, give them the cached answer.
  56. Previously, we would give them no answer at all.
  57. o Minor bugfixes:
  58. - Allow Tor to start when RunAsDaemon is set but no logs are set.
  59. - Don't crash when the controller receives a third argument to an
  60. "extendcircuit" request.
  61. - Controller protocol fixes: fix encoding in "getinfo addr-mappings"
  62. response; fix error code when "getinfo dir/status/" fails.
  63. - Fix configure.in to not produce broken configure files with
  64. more recent versions of autoconf. Thanks to Clint for his auto*
  65. voodoo.
  66. - Fix security bug on NetBSD that could allow someone to force
  67. uninitialized RAM to be sent to a server's DNS resolver. This
  68. only affects NetBSD and other platforms that do not bounds-check
  69. tolower().
  70. - Warn user when using libevent 1.1a or earlier with win32 or kqueue
  71. methods: these are known to be buggy.
  72. - If we're a directory mirror and we ask for "all" network status
  73. documents, we would discard status documents from authorities
  74. we don't recognize.
  75. Changes in version 0.1.1.23 - 2006-07-30
  76. o Major bugfixes:
  77. - Fast Tor servers, especially exit nodes, were triggering asserts
  78. due to a bug in handling the list of pending DNS resolves. Some
  79. bugs still remain here; we're hunting them.
  80. - Entry guards could crash clients by sending unexpected input.
  81. - More fixes on reachability testing: if you find yourself reachable,
  82. then don't ever make any client requests (so you stop predicting
  83. circuits), then hup or have your clock jump, then later your IP
  84. changes, you won't think circuits are working, so you won't try to
  85. test reachability, so you won't publish.
  86. o Minor bugfixes:
  87. - Avoid a crash if the controller does a resetconf firewallports
  88. and then a setconf fascistfirewall=1.
  89. - Avoid an integer underflow when the dir authority decides whether
  90. a router is stable: we might wrongly label it stable, and compute
  91. a slightly wrong median stability, when a descriptor is published
  92. later than now.
  93. - Fix a place where we might trigger an assert if we can't build our
  94. own server descriptor yet.
  95. Changes in version 0.1.1.22 - 2006-07-05
  96. o Major bugfixes:
  97. - Fix a big bug that was causing servers to not find themselves
  98. reachable if they changed IP addresses. Since only 0.1.1.22+
  99. servers can do reachability testing correctly, now we automatically
  100. make sure to test via one of these.
  101. - Fix to allow clients and mirrors to learn directory info from
  102. descriptor downloads that get cut off partway through.
  103. - Directory authorities had a bug in deciding if a newly published
  104. descriptor was novel enough to make everybody want a copy -- a few
  105. servers seem to be publishing new descriptors many times a minute.
  106. o Minor bugfixes:
  107. - Fix a rare bug that was causing some servers to complain about
  108. "closing wedged cpuworkers" and skip some circuit create requests.
  109. - Make the Exit flag in directory status documents actually work.
  110. Changes in version 0.1.1.21 - 2006-06-10
  111. o Crash and assert fixes from 0.1.1.20:
  112. - Fix a rare crash on Tor servers that have enabled hibernation.
  113. - Fix a seg fault on startup for Tor networks that use only one
  114. directory authority.
  115. - Fix an assert from a race condition that occurs on Tor servers
  116. while exiting, where various threads are trying to log that they're
  117. exiting, and delete the logs, at the same time.
  118. - Make our unit tests pass again on certain obscure platforms.
  119. o Other fixes:
  120. - Add support for building SUSE RPM packages.
  121. - Speed up initial bootstrapping for clients: if we are making our
  122. first ever connection to any entry guard, then don't mark it down
  123. right after that.
  124. - When only one Tor server in the network is labelled as a guard,
  125. and we've already picked him, we would cycle endlessly picking him
  126. again, being unhappy about it, etc. Now we specifically exclude
  127. current guards when picking a new guard.
  128. - Servers send create cells more reliably after the TLS connection
  129. is established: we were sometimes forgetting to send half of them
  130. when we had more than one pending.
  131. - If we get a create cell that asks us to extend somewhere, but the
  132. Tor server there doesn't match the expected digest, we now send
  133. a destroy cell back, rather than silently doing nothing.
  134. - Make options->RedirectExit work again.
  135. - Make cookie authentication for the controller work again.
  136. - Stop being picky about unusual characters in the arguments to
  137. mapaddress. It's none of our business.
  138. - Add a new config option "TestVia" that lets you specify preferred
  139. middle hops to use for test circuits. Perhaps this will let me
  140. debug the reachability problems better.
  141. o Log / documentation fixes:
  142. - If we're a server and some peer has a broken TLS certificate, don't
  143. log about it unless ProtocolWarnings is set, i.e., we want to hear
  144. about protocol violations by others.
  145. - Fix spelling of VirtualAddrNetwork in man page.
  146. - Add a better explanation at the top of the autogenerated torrc file
  147. about what happened to our old torrc.
  148. Changes in version 0.1.1.20 - 2006-05-23
  149. o Crash and assert fixes from 0.1.0.17:
  150. - Fix assert bug in close_logs() on exit: when we close and delete
  151. logs, remove them all from the global "logfiles" list.
  152. - Fix an assert error when we're out of space in the connection_list
  153. and we try to post a hidden service descriptor (reported by Peter
  154. Palfrader).
  155. - Fix a rare assert error when we've tried all intro points for
  156. a hidden service and we try fetching the service descriptor again:
  157. "Assertion conn->state != AP_CONN_STATE_RENDDESC_WAIT failed".
  158. - Setconf SocksListenAddress kills Tor if it fails to bind. Now back
  159. out and refuse the setconf if it would fail.
  160. - If you specify a relative torrc path and you set RunAsDaemon in
  161. your torrc, then it chdir()'s to the new directory. If you then
  162. HUP, it tries to load the new torrc location, fails, and exits.
  163. The fix: no longer allow a relative path to torrc when using -f.
  164. - Check for integer overflows in more places, when adding elements
  165. to smartlists. This could possibly prevent a buffer overflow
  166. on malicious huge inputs.
  167. o Security fixes, major:
  168. - When we're printing strings from the network, don't try to print
  169. non-printable characters. Now we're safer against shell escape
  170. sequence exploits, and also against attacks to fool users into
  171. misreading their logs.
  172. - Implement entry guards: automatically choose a handful of entry
  173. nodes and stick with them for all circuits. Only pick new guards
  174. when the ones you have are unsuitable, and if the old guards
  175. become suitable again, switch back. This will increase security
  176. dramatically against certain end-point attacks. The EntryNodes
  177. config option now provides some hints about which entry guards you
  178. want to use most; and StrictEntryNodes means to only use those.
  179. Fixes CVE-2006-0414.
  180. - Implement exit enclaves: if we know an IP address for the
  181. destination, and there's a running Tor server at that address
  182. which allows exit to the destination, then extend the circuit to
  183. that exit first. This provides end-to-end encryption and end-to-end
  184. authentication. Also, if the user wants a .exit address or enclave,
  185. use 4 hops rather than 3, and cannibalize a general circ for it
  186. if you can.
  187. - Obey our firewall options more faithfully:
  188. . If we can't get to a dirserver directly, try going via Tor.
  189. . Don't ever try to connect (as a client) to a place our
  190. firewall options forbid.
  191. . If we specify a proxy and also firewall options, obey the
  192. firewall options even when we're using the proxy: some proxies
  193. can only proxy to certain destinations.
  194. - Make clients regenerate their keys when their IP address changes.
  195. - For the OS X package's modified privoxy config file, comment
  196. out the "logfile" line so we don't log everything passed
  197. through privoxy.
  198. - Our TLS handshakes were generating a single public/private
  199. keypair for the TLS context, rather than making a new one for
  200. each new connection. Oops. (But we were still rotating them
  201. periodically, so it's not so bad.)
  202. - When we were cannibalizing a circuit with a particular exit
  203. node in mind, we weren't checking to see if that exit node was
  204. already present earlier in the circuit. Now we are.
  205. - Require server descriptors to list IPv4 addresses -- hostnames
  206. are no longer allowed. This also fixes potential vulnerabilities
  207. to servers providing hostnames as their address and then
  208. preferentially resolving them so they can partition users.
  209. - Our logic to decide if the OR we connected to was the right guy
  210. was brittle and maybe open to a mitm for invalid routers.
  211. o Security fixes, minor:
  212. - Adjust tor-spec.txt to parameterize cell and key lengths. Now
  213. Ian Goldberg can prove things about our handshake protocol more
  214. easily.
  215. - Make directory authorities generate a separate "guard" flag to
  216. mean "would make a good entry guard". Clients now honor the
  217. is_guard flag rather than looking at is_fast or is_stable.
  218. - Try to list MyFamily elements by key, not by nickname, and warn
  219. if we've not heard of a server.
  220. - Start using RAND_bytes rather than RAND_pseudo_bytes from
  221. OpenSSL. Also, reseed our entropy every hour, not just at
  222. startup. And add entropy in 512-bit chunks, not 160-bit chunks.
  223. - Refuse server descriptors where the fingerprint line doesn't match
  224. the included identity key. Tor doesn't care, but other apps (and
  225. humans) might actually be trusting the fingerprint line.
  226. - We used to kill the circuit when we receive a relay command we
  227. don't recognize. Now we just drop that cell.
  228. - Fix a bug found by Lasse Overlier: when we were making internal
  229. circuits (intended to be cannibalized later for rendezvous and
  230. introduction circuits), we were picking them so that they had
  231. useful exit nodes. There was no need for this, and it actually
  232. aids some statistical attacks.
  233. - Start treating internal circuits and exit circuits separately.
  234. It's important to keep them separate because internal circuits
  235. have their last hops picked like middle hops, rather than like
  236. exit hops. So exiting on them will break the user's expectations.
  237. - Fix a possible way to DoS dirservers.
  238. - When the client asked for a rendezvous port that the hidden
  239. service didn't want to provide, we were sending an IP address
  240. back along with the end cell. Fortunately, it was zero. But stop
  241. that anyway.
  242. o Packaging improvements:
  243. - Implement --with-libevent-dir option to ./configure. Improve
  244. search techniques to find libevent, and use those for openssl too.
  245. - Fix a couple of bugs in OpenSSL detection. Deal better when
  246. there are multiple SSLs installed with different versions.
  247. - Avoid warnings about machine/limits.h on Debian GNU/kFreeBSD.
  248. - On non-gcc compilers (e.g. Solaris's cc), use "-g -O" instead of
  249. "-Wall -g -O2".
  250. - Make unit tests (and other invocations that aren't the real Tor)
  251. run without launching listeners, creating subdirectories, and so on.
  252. - The OS X installer was adding a symlink for tor_resolve but
  253. the binary was called tor-resolve (reported by Thomas Hardly).
  254. - Now we can target arch and OS in rpm builds (contributed by
  255. Phobos). Also make the resulting dist-rpm filename match the
  256. target arch.
  257. - Apply Matt Ghali's --with-syslog-facility patch to ./configure
  258. if you log to syslog and want something other than LOG_DAEMON.
  259. - Fix the torify (tsocks) config file to not use Tor for localhost
  260. connections.
  261. - Start shipping socks-extensions.txt, tor-doc-unix.html,
  262. tor-doc-server.html, and stylesheet.css in the tarball.
  263. - Stop shipping tor-doc.html, INSTALL, and README in the tarball.
  264. They are useless now.
  265. - Add Peter Palfrader's contributed check-tor script. It lets you
  266. easily check whether a given server (referenced by nickname)
  267. is reachable by you.
  268. - Add BSD-style contributed startup script "rc.subr" from Peter
  269. Thoenen.
  270. o Directory improvements -- new directory protocol:
  271. - See tor/doc/dir-spec.txt for all the juicy details. Key points:
  272. - Authorities and caches publish individual descriptors (by
  273. digest, by fingerprint, by "all", and by "tell me yours").
  274. - Clients don't download or use the old directory anymore. Now they
  275. download network-statuses from the directory authorities, and
  276. fetch individual server descriptors as needed from mirrors.
  277. - Clients don't download descriptors of non-running servers.
  278. - Download descriptors by digest, not by fingerprint. Caches try to
  279. download all listed digests from authorities; clients try to
  280. download "best" digests from caches. This avoids partitioning
  281. and isolating attacks better.
  282. - Only upload a new server descriptor when options change, 18
  283. hours have passed, uptime is reset, or bandwidth changes a lot.
  284. - Directory authorities silently throw away new descriptors that
  285. haven't changed much if the timestamps are similar. We do this to
  286. tolerate older Tor servers that upload a new descriptor every 15
  287. minutes. (It seemed like a good idea at the time.)
  288. - Clients choose directory servers from the network status lists,
  289. not from their internal list of router descriptors. Now they can
  290. go to caches directly rather than needing to go to authorities
  291. to bootstrap the first set of descriptors.
  292. - When picking a random directory, prefer non-authorities if any
  293. are known.
  294. - Add a new flag to network-status indicating whether the server
  295. can answer v2 directory requests too.
  296. - Directory mirrors now cache up to 16 unrecognized network-status
  297. docs, so new directory authorities will be cached too.
  298. - Stop parsing, storing, or using running-routers output (but
  299. mirrors still cache and serve it).
  300. - Clients consider a threshold of "versioning" directory authorities
  301. before deciding whether to warn the user that he's obsolete.
  302. - Authorities publish separate sorted lists of recommended versions
  303. for clients and for servers.
  304. - Change DirServers config line to note which dirs are v1 authorities.
  305. - Put nicknames on the DirServer line, so we can refer to them
  306. without requiring all our users to memorize their IP addresses.
  307. - Remove option when getting directory cache to see whether they
  308. support running-routers; they all do now. Replace it with one
  309. to see whether caches support v2 stuff.
  310. - Stop listing down or invalid nodes in the v1 directory. This
  311. reduces its bulk by about 1/3, and reduces load on mirrors.
  312. - Mirrors no longer cache the v1 directory as often.
  313. - If we as a directory mirror don't know of any v1 directory
  314. authorities, then don't try to cache any v1 directories.
  315. o Other directory improvements:
  316. - Add lefkada.eecs.harvard.edu and tor.dizum.com as fourth and
  317. fifth authoritative directory servers.
  318. - Directory authorities no longer require an open connection from
  319. a server to consider him "reachable". We need this change because
  320. when we add new directory authorities, old servers won't know not
  321. to hang up on them.
  322. - Dir authorities now do their own external reachability testing
  323. of each server, and only list as running the ones they found to
  324. be reachable. We also send back warnings to the server's logs if
  325. it uploads a descriptor that we already believe is unreachable.
  326. - Spread the directory authorities' reachability testing over the
  327. entire testing interval, so we don't try to do 500 TLS's at once
  328. every 20 minutes.
  329. - Make the "stable" router flag in network-status be the median of
  330. the uptimes of running valid servers, and make clients pay
  331. attention to the network-status flags. Thus the cutoff adapts
  332. to the stability of the network as a whole, making IRC, IM, etc
  333. connections more reliable.
  334. - Make the v2 dir's "Fast" flag based on relative capacity, just
  335. like "Stable" is based on median uptime. Name everything in the
  336. top 7/8 Fast, and only the top 1/2 gets to be a Guard.
  337. - Retry directory requests if we fail to get an answer we like
  338. from a given dirserver (we were retrying before, but only if
  339. we fail to connect).
  340. - Return a robots.txt on our dirport to discourage google indexing.
  341. o Controller protocol improvements:
  342. - Revised controller protocol (version 1) that uses ascii rather
  343. than binary: tor/doc/control-spec.txt. Add supporting libraries
  344. in python and java and c# so you can use the controller from your
  345. applications without caring how our protocol works.
  346. - Allow the DEBUG controller event to work again. Mark certain log
  347. entries as "don't tell this to controllers", so we avoid cycles.
  348. - New controller function "getinfo accounting", to ask how
  349. many bytes we've used in this time period.
  350. - Add a "resetconf" command so you can set config options like
  351. AllowUnverifiedNodes and LongLivedPorts to "". Also, if you give
  352. a config option in the torrc with no value, then it clears it
  353. entirely (rather than setting it to its default).
  354. - Add a "getinfo config-file" to tell us where torrc is. Also
  355. expose guard nodes, config options/names.
  356. - Add a "quit" command (when when using the controller manually).
  357. - Add a new signal "newnym" to "change pseudonyms" -- that is, to
  358. stop using any currently-dirty circuits for new streams, so we
  359. don't link new actions to old actions. This also occurs on HUP
  360. or "signal reload".
  361. - If we would close a stream early (e.g. it asks for a .exit that
  362. we know would refuse it) but the LeaveStreamsUnattached config
  363. option is set by the controller, then don't close it.
  364. - Add a new controller event type "authdir_newdescs" that allows
  365. controllers to get all server descriptors that were uploaded to
  366. a router in its role as directory authority.
  367. - New controller option "getinfo desc/all-recent" to fetch the
  368. latest server descriptor for every router that Tor knows about.
  369. - Fix the controller's "attachstream 0" command to treat conn like
  370. it just connected, doing address remapping, handling .exit and
  371. .onion idioms, and so on. Now we're more uniform in making sure
  372. that the controller hears about new and closing connections.
  373. - Permit transitioning from ORPort==0 to ORPort!=0, and back, from
  374. the controller. Also, rotate dns and cpu workers if the controller
  375. changes options that will affect them; and initialize the dns
  376. worker cache tree whether or not we start out as a server.
  377. - Add a new circuit purpose 'controller' to let the controller ask
  378. for a circuit that Tor won't try to use. Extend the "extendcircuit"
  379. controller command to let you specify the purpose if you're starting
  380. a new circuit. Add a new "setcircuitpurpose" controller command to
  381. let you change a circuit's purpose after it's been created.
  382. - Let the controller ask for "getinfo dir/server/foo" so it can ask
  383. directly rather than connecting to the dir port. "getinfo
  384. dir/status/foo" also works, but currently only if your DirPort
  385. is enabled.
  386. - Let the controller tell us about certain router descriptors
  387. that it doesn't want Tor to use in circuits. Implement
  388. "setrouterpurpose" and modify "+postdescriptor" to do this.
  389. - If the controller's *setconf commands fail, collect an error
  390. message in a string and hand it back to the controller -- don't
  391. just tell them to go read their logs.
  392. o Scalability, resource management, and performance:
  393. - Fix a major load balance bug: we were round-robin reading in 16 KB
  394. chunks, and servers with bandwidthrate of 20 KB, while downloading
  395. a 600 KB directory, would starve their other connections. Now we
  396. try to be a bit more fair.
  397. - Be more conservative about whether to advertise our DirPort.
  398. The main change is to not advertise if we're running at capacity
  399. and either a) we could hibernate ever or b) our capacity is low
  400. and we're using a default DirPort.
  401. - We weren't cannibalizing circuits correctly for
  402. CIRCUIT_PURPOSE_C_ESTABLISH_REND and
  403. CIRCUIT_PURPOSE_S_ESTABLISH_INTRO, so we were being forced to
  404. build those from scratch. This should make hidden services faster.
  405. - Predict required circuits better, with an eye toward making hidden
  406. services faster on the service end.
  407. - Compress exit policies even more: look for duplicate lines and
  408. remove them.
  409. - Generate 18.0.0.0/8 address policy format in descs when we can;
  410. warn when the mask is not reducible to a bit-prefix.
  411. - There used to be two ways to specify your listening ports in a
  412. server descriptor: on the "router" line and with a separate "ports"
  413. line. Remove support for the "ports" line.
  414. - Reduce memory requirements in our structs by changing the order
  415. of fields. Replace balanced trees with hash tables. Inline
  416. bottleneck smartlist functions. Add a "Map from digest to void*"
  417. abstraction so we can do less hex encoding/decoding, and use it
  418. in router_get_by_digest(). Many other CPU and memory improvements.
  419. - Allow tor_gzip_uncompress to extract as much as possible from
  420. truncated compressed data. Try to extract as many
  421. descriptors as possible from truncated http responses (when
  422. purpose is DIR_PURPOSE_FETCH_ROUTERDESC).
  423. - Make circ->onionskin a pointer, not a static array. moria2 was using
  424. 125000 circuit_t's after it had been up for a few weeks, which
  425. translates to 20+ megs of wasted space.
  426. - The private half of our EDH handshake keys are now chosen out
  427. of 320 bits, not 1024 bits. (Suggested by Ian Goldberg.)
  428. - Stop doing the complex voodoo overkill checking for insecure
  429. Diffie-Hellman keys. Just check if it's in [2,p-2] and be happy.
  430. - Do round-robin writes for TLS of at most 16 kB per write. This
  431. might be more fair on loaded Tor servers.
  432. - Do not use unaligned memory access on alpha, mips, or mipsel.
  433. It *works*, but is very slow, so we treat them as if it doesn't.
  434. o Other bugfixes and improvements:
  435. - Start storing useful information to $DATADIR/state, so we can
  436. remember things across invocations of Tor. Retain unrecognized
  437. lines so we can be forward-compatible, and write a TorVersion line
  438. so we can be backward-compatible.
  439. - If ORPort is set, Address is not explicitly set, and our hostname
  440. resolves to a private IP address, try to use an interface address
  441. if it has a public address. Now Windows machines that think of
  442. themselves as localhost can guess their address.
  443. - Regenerate our local descriptor if it's dirty and we try to use
  444. it locally (e.g. if it changes during reachability detection).
  445. This was causing some Tor servers to keep publishing the same
  446. initial descriptor forever.
  447. - Tor servers with dynamic IP addresses were needing to wait 18
  448. hours before they could start doing reachability testing using
  449. the new IP address and ports. This is because they were using
  450. the internal descriptor to learn what to test, yet they were only
  451. rebuilding the descriptor once they decided they were reachable.
  452. - It turns out we couldn't bootstrap a network since we added
  453. reachability detection in 0.1.0.1-rc. Good thing the Tor network
  454. has never gone down. Add an AssumeReachable config option to let
  455. servers and authorities bootstrap. When we're trying to build a
  456. high-uptime or high-bandwidth circuit but there aren't enough
  457. suitable servers, try being less picky rather than simply failing.
  458. - Newly bootstrapped Tor networks couldn't establish hidden service
  459. circuits until they had nodes with high uptime. Be more tolerant.
  460. - Really busy servers were keeping enough circuits open on stable
  461. connections that they were wrapping around the circuit_id
  462. space. (It's only two bytes.) This exposed a bug where we would
  463. feel free to reuse a circuit_id even if it still exists but has
  464. been marked for close. Try to fix this bug. Some bug remains.
  465. - When we fail to bind or listen on an incoming or outgoing
  466. socket, we now close it before refusing, rather than just
  467. leaking it. (Thanks to Peter Palfrader for finding.)
  468. - Fix a file descriptor leak in start_daemon().
  469. - On Windows, you can't always reopen a port right after you've
  470. closed it. So change retry_listeners() to only close and re-open
  471. ports that have changed.
  472. - Workaround a problem with some http proxies that refuse GET
  473. requests that specify "Content-Length: 0". Reported by Adrian.
  474. - Recover better from TCP connections to Tor servers that are
  475. broken but don't tell you (it happens!); and rotate TLS
  476. connections once a week.
  477. - Fix a scary-looking but apparently harmless bug where circuits
  478. would sometimes start out in state CIRCUIT_STATE_OR_WAIT at
  479. servers, and never switch to state CIRCUIT_STATE_OPEN.
  480. - Check for even more Windows version flags when writing the platform
  481. string in server descriptors, and note any we don't recognize.
  482. - Add reasons to DESTROY and RELAY_TRUNCATED cells, so clients can
  483. get a better idea of why their circuits failed. Not used yet.
  484. - Add TTLs to RESOLVED, CONNECTED, and END_REASON_EXITPOLICY cells.
  485. We don't use them yet, but maybe one day our DNS resolver will be
  486. able to discover them.
  487. - Let people type "tor --install" as well as "tor -install" when they
  488. want to make it an NT service.
  489. - Looks like we were never delivering deflated (i.e. compressed)
  490. running-routers lists, even when asked. Oops.
  491. - We were leaking some memory every time the client changed IPs.
  492. - Clean up more of the OpenSSL memory when exiting, so we can detect
  493. memory leaks better.
  494. - Never call free() on tor_malloc()d memory. This will help us
  495. use dmalloc to detect memory leaks.
  496. - Some Tor servers process billions of cells per day. These
  497. statistics are now uint64_t's.
  498. - Check [X-]Forwarded-For headers in HTTP requests when generating
  499. log messages. This lets people run dirservers (and caches) behind
  500. Apache but still know which IP addresses are causing warnings.
  501. - Fix minor integer overflow in calculating when we expect to use up
  502. our bandwidth allocation before hibernating.
  503. - Lower the minimum required number of file descriptors to 1000,
  504. so we can have some overhead for Valgrind on Linux, where the
  505. default ulimit -n is 1024.
  506. - Stop writing the "router.desc" file, ever. Nothing uses it anymore,
  507. and its existence is confusing some users.
  508. o Config option fixes:
  509. - Add a new config option ExitPolicyRejectPrivate which defaults
  510. to on. Now all exit policies will begin with rejecting private
  511. addresses, unless the server operator explicitly turns it off.
  512. - Bump the default bandwidthrate to 3 MB, and burst to 6 MB.
  513. - Add new ReachableORAddresses and ReachableDirAddresses options
  514. that understand address policies. FascistFirewall is now a synonym
  515. for "ReachableORAddresses *:443", "ReachableDirAddresses *:80".
  516. - Start calling it FooListenAddress rather than FooBindAddress,
  517. since few of our users know what it means to bind an address
  518. or port.
  519. - If the user gave Tor an odd number of command-line arguments,
  520. we were silently ignoring the last one. Now we complain and fail.
  521. This wins the oldest-bug prize -- this bug has been present since
  522. November 2002, as released in Tor 0.0.0.
  523. - If you write "HiddenServicePort 6667 127.0.0.1 6668" in your
  524. torrc rather than "HiddenServicePort 6667 127.0.0.1:6668",
  525. it would silently ignore the 6668.
  526. - If we get a linelist or linelist_s config option from the torrc,
  527. e.g. ExitPolicy, and it has no value, warn and skip rather than
  528. silently resetting it to its default.
  529. - Setconf was appending items to linelists, not clearing them.
  530. - Add MyFamily to torrc.sample in the server section, so operators
  531. will be more likely to learn that it exists.
  532. - Make ContactInfo mandatory for authoritative directory servers.
  533. - MaxConn has been obsolete for a while now. Document the ConnLimit
  534. config option, which is a *minimum* number of file descriptors
  535. that must be available else Tor refuses to start.
  536. - Get rid of IgnoreVersion undocumented config option, and make us
  537. only warn, never exit, when we're running an obsolete version.
  538. - Make MonthlyAccountingStart config option truly obsolete now.
  539. - Correct the man page entry on TrackHostExitsExpire.
  540. - Let directory authorities start even if they don't specify an
  541. Address config option.
  542. - Change "AllowUnverifiedNodes" to "AllowInvalidNodes", to
  543. reflect the updated flags in our v2 dir protocol.
  544. o Config option features:
  545. - Add a new config option FastFirstHopPK (on by default) so clients
  546. do a trivial crypto handshake for their first hop, since TLS has
  547. already taken care of confidentiality and authentication.
  548. - Let the user set ControlListenAddress in the torrc. This can be
  549. dangerous, but there are some cases (like a secured LAN) where it
  550. makes sense.
  551. - New config options to help controllers: FetchServerDescriptors
  552. and FetchHidServDescriptors for whether to fetch server
  553. info and hidserv info or let the controller do it, and
  554. PublishServerDescriptor and PublishHidServDescriptors.
  555. - Also let the controller set the __AllDirActionsPrivate config
  556. option if you want all directory fetches/publishes to happen via
  557. Tor (it assumes your controller bootstraps your circuits).
  558. - Add "HardwareAccel" config option: support for crypto hardware
  559. accelerators via OpenSSL. Off by default, until we find somebody
  560. smart who can test it for us. (It appears to produce seg faults
  561. in at least some cases.)
  562. - New config option "AuthDirRejectUnlisted" for directory authorities
  563. as a panic button: if we get flooded with unusable servers we can
  564. revert to only listing servers in the approved-routers file.
  565. - Directory authorities can now reject/invalidate by key and IP,
  566. with the config options "AuthDirInvalid" and "AuthDirReject", or
  567. by marking a fingerprint as "!reject" or "!invalid" (as its
  568. nickname) in the approved-routers file. This is useful since
  569. currently we automatically list servers as running and usable
  570. even if we know they're jerks.
  571. - Add a new config option TestSocks so people can see whether their
  572. applications are using socks4, socks4a, socks5-with-ip, or
  573. socks5-with-fqdn. This way they don't have to keep mucking
  574. with tcpdump and wondering if something got cached somewhere.
  575. - Add "private:*" as an alias in configuration for policies. Now
  576. you can simplify your exit policy rather than needing to list
  577. every single internal or nonroutable network space.
  578. - Accept "private:*" in routerdesc exit policies; not generated yet
  579. because older Tors do not understand it.
  580. - Add configuration option "V1AuthoritativeDirectory 1" which
  581. moria1, moria2, and tor26 have set.
  582. - Implement an option, VirtualAddrMask, to set which addresses
  583. get handed out in response to mapaddress requests. This works
  584. around a bug in tsocks where 127.0.0.0/8 is never socksified.
  585. - Add a new config option FetchUselessDescriptors, off by default,
  586. for when you plan to run "exitlist" on your client and you want
  587. to know about even the non-running descriptors.
  588. - SocksTimeout: How long do we let a socks connection wait
  589. unattached before we fail it?
  590. - CircuitBuildTimeout: Cull non-open circuits that were born
  591. at least this many seconds ago.
  592. - CircuitIdleTimeout: Cull open clean circuits that were born
  593. at least this many seconds ago.
  594. - New config option SafeSocks to reject all application connections
  595. using unsafe socks protocols. Defaults to off.
  596. o Improved and clearer log messages:
  597. - Reduce clutter in server logs. We're going to try to make
  598. them actually usable now. New config option ProtocolWarnings that
  599. lets you hear about how _other Tors_ are breaking the protocol. Off
  600. by default.
  601. - Divide log messages into logging domains. Once we put some sort
  602. of interface on this, it will let people looking at more verbose
  603. log levels specify the topics they want to hear more about.
  604. - Log server fingerprint on startup, so new server operators don't
  605. have to go hunting around their filesystem for it.
  606. - Provide dire warnings to any users who set DirServer manually;
  607. move it out of torrc.sample and into torrc.complete.
  608. - Make the log message less scary when all the dirservers are
  609. temporarily unreachable.
  610. - When tor_socketpair() fails in Windows, give a reasonable
  611. Windows-style errno back.
  612. - Improve tor_gettimeofday() granularity on windows.
  613. - We were printing the number of idle dns workers incorrectly when
  614. culling them.
  615. - Handle duplicate lines in approved-routers files without warning.
  616. - We were whining about using socks4 or socks5-with-local-lookup
  617. even when it's an IP address in the "virtual" range we designed
  618. exactly for this case.
  619. - Check for named servers when looking them up by nickname;
  620. warn when we're calling a non-named server by its nickname;
  621. don't warn twice about the same name.
  622. - Downgrade the dirserver log messages when whining about
  623. unreachability.
  624. - Correct "your server is reachable" log entries to indicate that
  625. it was self-testing that told us so.
  626. - If we're trying to be a Tor server and running Windows 95/98/ME
  627. as a server, explain that we'll likely crash.
  628. - Provide a more useful warn message when our onion queue gets full:
  629. the CPU is too slow or the exit policy is too liberal.
  630. - Don't warn when we receive a 503 from a dirserver/cache -- this
  631. will pave the way for them being able to refuse if they're busy.
  632. - When we fail to bind a listener, try to provide a more useful
  633. log message: e.g., "Is Tor already running?"
  634. - Only start testing reachability once we've established a
  635. circuit. This will make startup on dir authorities less noisy.
  636. - Don't try to upload hidden service descriptors until we have
  637. established a circuit.
  638. - Tor didn't warn when it failed to open a log file.
  639. - Warn when listening on a public address for socks. We suspect a
  640. lot of people are setting themselves up as open socks proxies,
  641. and they have no idea that jerks on the Internet are using them,
  642. since they simply proxy the traffic into the Tor network.
  643. - Give a useful message when people run Tor as the wrong user,
  644. rather than telling them to start chowning random directories.
  645. - Fix a harmless bug that was causing Tor servers to log
  646. "Got an end because of misc error, but we're not an AP. Closing."
  647. - Fix wrong log message when you add a "HiddenServiceNodes" config
  648. line without any HiddenServiceDir line (reported by Chris Thomas).
  649. - Directory authorities now stop whining so loudly about bad
  650. descriptors that they fetch from other dirservers. So when there's
  651. a log complaint, it's for sure from a freshly uploaded descriptor.
  652. - When logging via syslog, include the pid whenever we provide
  653. a log entry. Suggested by Todd Fries.
  654. - When we're shutting down and we do something like try to post a
  655. server descriptor or rendezvous descriptor, don't complain that
  656. we seem to be unreachable. Of course we are, we're shutting down.
  657. - Change log line for unreachability to explicitly suggest /etc/hosts
  658. as the culprit. Also make it clearer what IP address and ports we're
  659. testing for reachability.
  660. - Put quotes around user-supplied strings when logging so users are
  661. more likely to realize if they add bad characters (like quotes)
  662. to the torrc.
  663. - NT service patch from Matt Edman to improve error messages on Win32.
  664. Changes in version 0.1.0.17 - 2006-02-17
  665. o Crash bugfixes on 0.1.0.x:
  666. - When servers with a non-zero DirPort came out of hibernation,
  667. sometimes they would trigger an assert.
  668. o Other important bugfixes:
  669. - On platforms that don't have getrlimit (like Windows), we were
  670. artificially constraining ourselves to a max of 1024
  671. connections. Now just assume that we can handle as many as 15000
  672. connections. Hopefully this won't cause other problems.
  673. o Backported features:
  674. - When we're a server, a client asks for an old-style directory,
  675. and our write bucket is empty, don't give it to him. This way
  676. small servers can continue to serve the directory *sometimes*,
  677. without getting overloaded.
  678. - Whenever you get a 503 in response to a directory fetch, try
  679. once more. This will become important once servers start sending
  680. 503's whenever they feel busy.
  681. - Fetch a new directory every 120 minutes, not every 40 minutes.
  682. Now that we have hundreds of thousands of users running the old
  683. directory algorithm, it's starting to hurt a lot.
  684. - Bump up the period for forcing a hidden service descriptor upload
  685. from 20 minutes to 1 hour.
  686. Changes in version 0.1.0.16 - 2006-01-02
  687. o Crash bugfixes on 0.1.0.x:
  688. - On Windows, build with a libevent patch from "I-M Weasel" to avoid
  689. corrupting the heap, losing FDs, or crashing when we need to resize
  690. the fd_sets. (This affects the Win32 binaries, not Tor's sources.)
  691. - It turns out sparc64 platforms crash on unaligned memory access
  692. too -- so detect and avoid this.
  693. - Handle truncated compressed data correctly (by detecting it and
  694. giving an error).
  695. - Fix possible-but-unlikely free(NULL) in control.c.
  696. - When we were closing connections, there was a rare case that
  697. stomped on memory, triggering seg faults and asserts.
  698. - Avoid potential infinite recursion when building a descriptor. (We
  699. don't know that it ever happened, but better to fix it anyway.)
  700. - We were neglecting to unlink marked circuits from soon-to-close OR
  701. connections, which caused some rare scribbling on freed memory.
  702. - Fix a memory stomping race bug when closing the joining point of two
  703. rendezvous circuits.
  704. - Fix an assert in time parsing found by Steven Murdoch.
  705. o Other bugfixes on 0.1.0.x:
  706. - When we're doing reachability testing, provide more useful log
  707. messages so the operator knows what to expect.
  708. - Do not check whether DirPort is reachable when we are suppressing
  709. advertising it because of hibernation.
  710. - When building with -static or on Solaris, we sometimes needed -ldl.
  711. - One of the dirservers (tor26) changed its IP address.
  712. - When we're deciding whether a stream has enough circuits around
  713. that can handle it, count the freshly dirty ones and not the ones
  714. that are so dirty they won't be able to handle it.
  715. - When we're expiring old circuits, we had a logic error that caused
  716. us to close new rendezvous circuits rather than old ones.
  717. - Give a more helpful log message when you try to change ORPort via
  718. the controller: you should upgrade Tor if you want that to work.
  719. - We were failing to parse Tor versions that start with "Tor ".
  720. - Tolerate faulty streams better: when a stream fails for reason
  721. exitpolicy, stop assuming that the router is lying about his exit
  722. policy. When a stream fails for reason misc, allow it to retry just
  723. as if it was resolvefailed. When a stream has failed three times,
  724. reset its failure count so we can try again and get all three tries.
  725. Changes in version 0.1.0.15 - 2005-09-23
  726. o Bugfixes on 0.1.0.x:
  727. - Reject ports 465 and 587 (spam targets) in default exit policy.
  728. - Don't crash when we don't have any spare file descriptors and we
  729. try to spawn a dns or cpu worker.
  730. - Get rid of IgnoreVersion undocumented config option, and make us
  731. only warn, never exit, when we're running an obsolete version.
  732. - Don't try to print a null string when your server finds itself to
  733. be unreachable and the Address config option is empty.
  734. - Make the numbers in read-history and write-history into uint64s,
  735. so they don't overflow and publish negatives in the descriptor.
  736. - Fix a minor memory leak in smartlist_string_remove().
  737. - We were only allowing ourselves to upload a server descriptor at
  738. most every 20 minutes, even if it changed earlier than that.
  739. - Clean up log entries that pointed to old URLs.
  740. Changes in version 0.1.0.14 - 2005-08-08
  741. o Bugfixes on 0.1.0.x:
  742. - Fix the other half of the bug with crypto handshakes
  743. (CVE-2005-2643).
  744. - Fix an assert trigger if you send a 'signal term' via the
  745. controller when it's listening for 'event info' messages.
  746. Changes in version 0.1.0.13 - 2005-08-04
  747. o Bugfixes on 0.1.0.x:
  748. - Fix a critical bug in the security of our crypto handshakes.
  749. - Fix a size_t underflow in smartlist_join_strings2() that made
  750. it do bad things when you hand it an empty smartlist.
  751. - Fix Windows installer to ship Tor license (thanks to Aphex for
  752. pointing out this oversight) and put a link to the doc directory
  753. in the start menu.
  754. - Explicitly set no-unaligned-access for sparc: it turns out the
  755. new gcc's let you compile broken code, but that doesn't make it
  756. not-broken.
  757. Changes in version 0.1.0.12 - 2005-07-18
  758. o New directory servers:
  759. - tor26 has changed IP address.
  760. o Bugfixes on 0.1.0.x:
  761. - Fix a possible double-free in tor_gzip_uncompress().
  762. - When --disable-threads is set, do not search for or link against
  763. pthreads libraries.
  764. - Don't trigger an assert if an authoritative directory server
  765. claims its dirport is 0.
  766. - Fix bug with removing Tor as an NT service: some people were
  767. getting "The service did not return an error." Thanks to Matt
  768. Edman for the fix.
  769. Changes in version 0.1.0.11 - 2005-06-30
  770. o Bugfixes on 0.1.0.x:
  771. - Fix major security bug: servers were disregarding their
  772. exit policies if clients behaved unexpectedly.
  773. - Make OS X init script check for missing argument, so we don't
  774. confuse users who invoke it incorrectly.
  775. - Fix a seg fault in "tor --hash-password foo".
  776. - The MAPADDRESS control command was broken.
  777. Changes in version 0.1.0.10 - 2005-06-14
  778. o Fixes on Win32:
  779. - Make NT services work and start on startup on Win32 (based on
  780. patch by Matt Edman). See the FAQ entry for details.
  781. - Make 'platform' string in descriptor more accurate for Win32
  782. servers, so it's not just "unknown platform".
  783. - REUSEADDR on normal platforms means you can rebind to the port
  784. right after somebody else has let it go. But REUSEADDR on Win32
  785. means you can bind to the port _even when somebody else already
  786. has it bound_! So, don't do that on Win32.
  787. - Clean up the log messages when starting on Win32 with no config
  788. file.
  789. - Allow seeding the RNG on Win32 even when you're not running as
  790. Administrator. If seeding the RNG on Win32 fails, quit.
  791. o Assert / crash bugs:
  792. - Refuse relay cells that claim to have a length larger than the
  793. maximum allowed. This prevents a potential attack that could read
  794. arbitrary memory (e.g. keys) from an exit server's process
  795. (CVE-2005-2050).
  796. - If unofficial Tor clients connect and send weird TLS certs, our
  797. Tor server triggers an assert. Stop asserting, and start handling
  798. TLS errors better in other situations too.
  799. - Fix a race condition that can trigger an assert when we have a
  800. pending create cell and an OR connection attempt fails.
  801. o Resource leaks:
  802. - Use pthreads for worker processes rather than forking. This was
  803. forced because when we forked, we ended up wasting a lot of
  804. duplicate ram over time.
  805. - Also switch to foo_r versions of some library calls to allow
  806. reentry and threadsafeness.
  807. - Implement --disable-threads configure option. Disable threads on
  808. netbsd and openbsd by default, because they have no reentrant
  809. resolver functions (!), and on solaris since it has other
  810. threading issues.
  811. - Fix possible bug on threading platforms (e.g. win32) which was
  812. leaking a file descriptor whenever a cpuworker or dnsworker died.
  813. - Fix a minor memory leak when somebody establishes an introduction
  814. point at your Tor server.
  815. - Fix possible memory leak in tor_lookup_hostname(). (Thanks to
  816. Adam Langley.)
  817. - Add ./configure --with-dmalloc option, to track memory leaks.
  818. - And try to free all memory on closing, so we can detect what
  819. we're leaking.
  820. o Protocol correctness:
  821. - When we've connected to an OR and handshaked but didn't like
  822. the result, we were closing the conn without sending destroy
  823. cells back for pending circuits. Now send those destroys.
  824. - Start sending 'truncated' cells back rather than destroy cells
  825. if the circuit closes in front of you. This means we won't have
  826. to abandon partially built circuits.
  827. - Handle changed router status correctly when dirserver reloads
  828. fingerprint file. We used to be dropping all unverified descriptors
  829. right then. The bug was hidden because we would immediately
  830. fetch a directory from another dirserver, which would include the
  831. descriptors we just dropped.
  832. - Revise tor-spec to add more/better stream end reasons.
  833. - Revise all calls to connection_edge_end to avoid sending 'misc',
  834. and to take errno into account where possible.
  835. - Client now retries when streams end early for 'hibernating' or
  836. 'resource limit' reasons, rather than failing them.
  837. - Try to be more zealous about calling connection_edge_end when
  838. things go bad with edge conns in connection.c.
  839. o Robustness improvements:
  840. - Better handling for heterogeneous / unreliable nodes:
  841. - Annotate circuits with whether they aim to contain high uptime
  842. nodes and/or high capacity nodes. When building circuits, choose
  843. appropriate nodes.
  844. - This means that every single node in an intro rend circuit,
  845. not just the last one, will have a minimum uptime.
  846. - New config option LongLivedPorts to indicate application streams
  847. that will want high uptime circuits.
  848. - Servers reset uptime when a dir fetch entirely fails. This
  849. hopefully reflects stability of the server's network connectivity.
  850. - If somebody starts his tor server in Jan 2004 and then fixes his
  851. clock, don't make his published uptime be a year.
  852. - Reset published uptime when we wake up from hibernation.
  853. - Introduce a notion of 'internal' circs, which are chosen without
  854. regard to the exit policy of the last hop. Intro and rendezvous
  855. circs must be internal circs, to avoid leaking information. Resolve
  856. and connect streams can use internal circs if they want.
  857. - New circuit pooling algorithm: keep track of what destination ports
  858. we've used recently (start out assuming we'll want to use 80), and
  859. make sure to have enough circs around to satisfy these ports. Also
  860. make sure to have 2 internal circs around if we've required internal
  861. circs lately (and with high uptime if we've seen that lately too).
  862. - Turn addr_policy_compare from a tristate to a quadstate; this should
  863. help address our "Ah, you allow 1.2.3.4:80. You are a good choice
  864. for google.com" problem.
  865. - When a client asks us for a dir mirror and we don't have one,
  866. launch an attempt to get a fresh one.
  867. - First cut at support for "create-fast" cells. Clients can use
  868. these when extending to their first hop, since the TLS already
  869. provides forward secrecy and authentication. Not enabled on
  870. clients yet.
  871. o Reachability testing.
  872. - Your Tor server will automatically try to see if its ORPort and
  873. DirPort are reachable from the outside, and it won't upload its
  874. descriptor until it decides at least ORPort is reachable (when
  875. DirPort is not yet found reachable, publish it as zero).
  876. - When building testing circs for ORPort testing, use only
  877. high-bandwidth nodes, so fewer circuits fail.
  878. - Notice when our IP changes, and reset stats/uptime/reachability.
  879. - Authdirservers don't do ORPort reachability detection, since
  880. they're in clique mode, so it will be rare to find a server not
  881. already connected to them.
  882. - Authdirservers now automatically approve nodes running 0.1.0.2-rc
  883. or later.
  884. o Dirserver fixes:
  885. - Now we allow two unverified servers with the same nickname
  886. but different keys. But if a nickname is verified, only that
  887. nickname+key are allowed.
  888. - If you're an authdirserver connecting to an address:port,
  889. and it's not the OR you were expecting, forget about that
  890. descriptor. If he *was* the one you were expecting, then forget
  891. about all other descriptors for that address:port.
  892. - Allow servers to publish descriptors from 12 hours in the future.
  893. Corollary: only whine about clock skew from the dirserver if
  894. he's a trusted dirserver (since now even verified servers could
  895. have quite wrong clocks).
  896. - Require servers that use the default dirservers to have public IP
  897. addresses. We have too many servers that are configured with private
  898. IPs and their admins never notice the log entries complaining that
  899. their descriptors are being rejected.
  900. o Efficiency improvements:
  901. - Use libevent. Now we can use faster async cores (like epoll, kpoll,
  902. and /dev/poll), and hopefully work better on Windows too.
  903. - Apple's OS X 10.4.0 ships with a broken kqueue API, and using
  904. kqueue on 10.3.9 causes kernel panics. Don't use kqueue on OS X.
  905. - Find libevent even if it's hiding in /usr/local/ and your
  906. CFLAGS and LDFLAGS don't tell you to look there.
  907. - Be able to link with libevent as a shared library (the default
  908. after 1.0d), even if it's hiding in /usr/local/lib and even
  909. if you haven't added /usr/local/lib to your /etc/ld.so.conf,
  910. assuming you're running gcc. Otherwise fail and give a useful
  911. error message.
  912. - Switch to a new buffer management algorithm, which tries to avoid
  913. reallocing and copying quite as much. In first tests it looks like
  914. it uses *more* memory on average, but less cpu.
  915. - Switch our internal buffers implementation to use a ring buffer,
  916. to hopefully improve performance for fast servers a lot.
  917. - Reenable the part of the code that tries to flush as soon as an
  918. OR outbuf has a full TLS record available. Perhaps this will make
  919. OR outbufs not grow as huge except in rare cases, thus saving lots
  920. of CPU time plus memory.
  921. - Improve performance for dirservers: stop re-parsing the whole
  922. directory every time you regenerate it.
  923. - Keep a big splay tree of (circid,orconn)->circuit mappings to make
  924. it much faster to look up a circuit for each relay cell.
  925. - Remove most calls to assert_all_pending_dns_resolves_ok(),
  926. since they're eating our cpu on exit nodes.
  927. - Stop wasting time doing a case insensitive comparison for every
  928. dns name every time we do any lookup. Canonicalize the names to
  929. lowercase when you first see them.
  930. o Hidden services:
  931. - Handle unavailable hidden services better. Handle slow or busy
  932. hidden services better.
  933. - Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
  934. circ as necessary, if there are any completed ones lying around
  935. when we try to launch one.
  936. - Make hidden services try to establish a rendezvous for 30 seconds
  937. after fetching the descriptor, rather than for n (where n=3)
  938. attempts to build a circuit.
  939. - Adjust maximum skew and age for rendezvous descriptors: let skew
  940. be 48 hours rather than 90 minutes.
  941. - Reject malformed .onion addresses rather then passing them on as
  942. normal web requests.
  943. o Controller:
  944. - More Tor controller support. See
  945. http://tor.eff.org/doc/control-spec.txt for all the new features,
  946. including signals to emulate unix signals from any platform;
  947. redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
  948. closestream; closecircuit; etc.
  949. - Encode hashed controller passwords in hex instead of base64,
  950. to make it easier to write controllers.
  951. - Revise control spec and implementation to allow all log messages to
  952. be sent to controller with their severities intact (suggested by
  953. Matt Edman). Disable debug-level logs while delivering a debug-level
  954. log to the controller, to prevent loop. Update TorControl to handle
  955. new log event types.
  956. o New config options/defaults:
  957. - Begin scrubbing sensitive strings from logs by default. Turn off
  958. the config option SafeLogging if you need to do debugging.
  959. - New exit policy: accept most low-numbered ports, rather than
  960. rejecting most low-numbered ports.
  961. - Put a note in the torrc about abuse potential with the default
  962. exit policy.
  963. - Add support for CONNECTing through https proxies, with "HttpsProxy"
  964. config option.
  965. - Add HttpProxyAuthenticator and HttpsProxyAuthenticator support
  966. based on patch from Adam Langley (basic auth only).
  967. - Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
  968. the fast servers that have been joining lately. (Clients are now
  969. willing to load balance over up to 2 MB of advertised bandwidth
  970. capacity too.)
  971. - New config option MaxAdvertisedBandwidth which lets you advertise
  972. a low bandwidthrate (to not attract as many circuits) while still
  973. allowing a higher bandwidthrate in reality.
  974. - Require BandwidthRate to be at least 20kB/s for servers.
  975. - Add a NoPublish config option, so you can be a server (e.g. for
  976. testing running Tor servers in other Tor networks) without
  977. publishing your descriptor to the primary dirservers.
  978. - Add a new AddressMap config directive to rewrite incoming socks
  979. addresses. This lets you, for example, declare an implicit
  980. required exit node for certain sites.
  981. - Add a new TrackHostExits config directive to trigger addressmaps
  982. for certain incoming socks addresses -- for sites that break when
  983. your exit keeps changing (based on patch from Mike Perry).
  984. - Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
  985. which describes how often we retry making new circuits if current
  986. ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
  987. how long we're willing to make use of an already-dirty circuit.
  988. - Change compiled-in SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to
  989. a config option "ShutdownWaitLength" (when using kill -INT on
  990. servers).
  991. - Fix an edge case in parsing config options: if they say "--"
  992. on the commandline, it's not a config option (thanks weasel).
  993. - New config option DirAllowPrivateAddresses for authdirservers.
  994. Now by default they refuse router descriptors that have non-IP or
  995. private-IP addresses.
  996. - Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
  997. smart" default value: low for servers and high for clients.
  998. - Some people were putting "Address " in their torrc, and they had
  999. a buggy resolver that resolved " " to 0.0.0.0. Oops.
  1000. - If DataDir is ~/.tor, and that expands to /.tor, then default to
  1001. LOCALSTATEDIR/tor instead.
  1002. - Implement --verify-config command-line option to check if your torrc
  1003. is valid without actually launching Tor.
  1004. o Logging improvements:
  1005. - When dirservers refuse a server descriptor, we now log its
  1006. contactinfo, platform, and the poster's IP address.
  1007. - Only warn once per nickname from add_nickname_list_to_smartlist()
  1008. per failure, so an entrynode or exitnode choice that's down won't
  1009. yell so much.
  1010. - When we're connecting to an OR and he's got a different nickname/key
  1011. than we were expecting, only complain loudly if we're an OP or a
  1012. dirserver. Complaining loudly to the OR admins just confuses them.
  1013. - Whine at you if you're a server and you don't set your contactinfo.
  1014. - Warn when exit policy implicitly allows local addresses.
  1015. - Give a better warning when some other server advertises an
  1016. ORPort that is actually an apache running ssl.
  1017. - If we get an incredibly skewed timestamp from a dirserver mirror
  1018. that isn't a verified OR, don't warn -- it's probably him that's
  1019. wrong.
  1020. - When a dirserver causes you to give a warn, mention which dirserver
  1021. it was.
  1022. - Initialize libevent later in the startup process, so the logs are
  1023. already established by the time we start logging libevent warns.
  1024. - Use correct errno on win32 if libevent fails.
  1025. - Check and warn about known-bad/slow libevent versions.
  1026. - Stop warning about sigpipes in the logs. We're going to
  1027. pretend that getting these occassionally is normal and fine.
  1028. o New contrib scripts:
  1029. - New experimental script tor/contrib/exitlist: a simple python
  1030. script to parse directories and find Tor nodes that exit to listed
  1031. addresses/ports.
  1032. - New experimental script tor/contrib/ExerciseServer.py (needs more
  1033. work) that uses the controller interface to build circuits and
  1034. fetch pages over them. This will help us bootstrap servers that
  1035. have lots of capacity but haven't noticed it yet.
  1036. - New experimental script tor/contrib/PathDemo.py (needs more work)
  1037. that uses the controller interface to let you choose whole paths
  1038. via addresses like
  1039. "<hostname>.<path,separated by dots>.<length of path>.path"
  1040. - New contributed script "privoxy-tor-toggle" to toggle whether
  1041. Privoxy uses Tor. Seems to be configured for Debian by default.
  1042. - Have torctl.in/tor.sh.in check for location of su binary (needed
  1043. on FreeBSD)
  1044. o Misc bugfixes:
  1045. - chdir() to your datadirectory at the *end* of the daemonize process,
  1046. not the beginning. This was a problem because the first time you
  1047. run tor, if your datadir isn't there, and you have runasdaemon set
  1048. to 1, it will try to chdir to it before it tries to create it. Oops.
  1049. - Fix several double-mark-for-close bugs, e.g. where we were finding
  1050. a conn for a cell even if that conn is already marked for close.
  1051. - Stop most cases of hanging up on a socks connection without sending
  1052. the socks reject.
  1053. - Fix a bug in the RPM package: set home directory for _tor to
  1054. something more reasonable when first installing.
  1055. - Stop putting nodename in the Platform string in server descriptors.
  1056. It doesn't actually help, and it is confusing/upsetting some people.
  1057. - When using preferred entry or exit nodes, ignore whether the
  1058. circuit wants uptime or capacity. They asked for the nodes, they
  1059. get the nodes.
  1060. - Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
  1061. artificially capped at 500kB.
  1062. - Cache local dns resolves correctly even when they're .exit
  1063. addresses.
  1064. - If we're hibernating and we get a SIGINT, exit immediately.
  1065. - tor-resolve requests were ignoring .exit if there was a working circuit
  1066. they could use instead.
  1067. - Pay more attention to the ClientOnly config option.
  1068. - Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in certain
  1069. installer screens; and don't put stuff into StartupItems unless
  1070. the user asks you to.
  1071. o Misc features:
  1072. - Rewrite address "serifos.exit" to "externalIP.serifos.exit"
  1073. rather than just rejecting it.
  1074. - If our clock jumps forward by 100 seconds or more, assume something
  1075. has gone wrong with our network and abandon all not-yet-used circs.
  1076. - When an application is using socks5, give him the whole variety of
  1077. potential socks5 responses (connect refused, host unreachable, etc),
  1078. rather than just "success" or "failure".
  1079. - A more sane version numbering system. See
  1080. http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
  1081. - Change version parsing logic: a version is "obsolete" if it is not
  1082. recommended and (1) there is a newer recommended version in the
  1083. same series, or (2) there are no recommended versions in the same
  1084. series, but there are some recommended versions in a newer series.
  1085. A version is "new" if it is newer than any recommended version in
  1086. the same series.
  1087. - Report HTTP reasons to client when getting a response from directory
  1088. servers -- so you can actually know what went wrong.
  1089. - Reject odd-looking addresses at the client (e.g. addresses that
  1090. contain a colon), rather than having the server drop them because
  1091. they're malformed.
  1092. - Stop publishing socksport in the directory, since it's not
  1093. actually meant to be public. For compatibility, publish a 0 there
  1094. for now.
  1095. - Since we ship our own Privoxy on OS X, tweak it so it doesn't write
  1096. cookies to disk and doesn't log each web request to disk. (Thanks
  1097. to Brett Carrington for pointing this out.)
  1098. - Add OSX uninstall instructions. An actual uninstall script will
  1099. come later.
  1100. - Add "opt hibernating 1" to server descriptor to make it clearer
  1101. whether the server is hibernating.
  1102. Changes in version 0.0.9.10 - 2005-06-16
  1103. o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
  1104. - Refuse relay cells that claim to have a length larger than the
  1105. maximum allowed. This prevents a potential attack that could read
  1106. arbitrary memory (e.g. keys) from an exit server's process
  1107. (CVE-2005-2050).
  1108. Changes in version 0.0.9.9 - 2005-04-23
  1109. o Bugfixes on 0.0.9.x:
  1110. - If unofficial Tor clients connect and send weird TLS certs, our
  1111. Tor server triggers an assert. This release contains a minimal
  1112. backport from the broader fix that we put into 0.1.0.4-rc.
  1113. Changes in version 0.0.9.8 - 2005-04-07
  1114. o Bugfixes on 0.0.9.x:
  1115. - We have a bug that I haven't found yet. Sometimes, very rarely,
  1116. cpuworkers get stuck in the 'busy' state, even though the cpuworker
  1117. thinks of itself as idle. This meant that no new circuits ever got
  1118. established. Here's a workaround to kill any cpuworker that's been
  1119. busy for more than 100 seconds.
  1120. Changes in version 0.0.9.7 - 2005-04-01
  1121. o Bugfixes on 0.0.9.x:
  1122. - Fix another race crash bug (thanks to Glenn Fink for reporting).
  1123. - Compare identity to identity, not to nickname, when extending to
  1124. a router not already in the directory. This was preventing us from
  1125. extending to unknown routers. Oops.
  1126. - Make sure to create OS X Tor user in <500 range, so we aren't
  1127. creating actual system users.
  1128. - Note where connection-that-hasn't-sent-end was marked, and fix
  1129. a few really loud instances of this harmless bug (it's fixed more
  1130. in 0.1.0.x).
  1131. Changes in version 0.0.9.6 - 2005-03-24
  1132. o Bugfixes on 0.0.9.x (crashes and asserts):
  1133. - Add new end stream reasons to maintainance branch. Fix bug where
  1134. reason (8) could trigger an assert. Prevent bug from recurring.
  1135. - Apparently win32 stat wants paths to not end with a slash.
  1136. - Fix assert triggers in assert_cpath_layer_ok(), where we were
  1137. blowing away the circuit that conn->cpath_layer points to, then
  1138. checking to see if the circ is well-formed. Backport check to make
  1139. sure we dont use the cpath on a closed connection.
  1140. - Prevent circuit_resume_edge_reading_helper() from trying to package
  1141. inbufs for marked-for-close streams.
  1142. - Don't crash on hup if your options->address has become unresolvable.
  1143. - Some systems (like OS X) sometimes accept() a connection and tell
  1144. you the remote host is 0.0.0.0:0. If this happens, due to some
  1145. other mis-features, we get confused; so refuse the conn for now.
  1146. o Bugfixes on 0.0.9.x (other):
  1147. - Fix harmless but scary "Unrecognized content encoding" warn message.
  1148. - Add new stream error reason: TORPROTOCOL reason means "you are not
  1149. speaking a version of Tor I understand; say bye-bye to your stream."
  1150. - Be willing to cache directories from up to ROUTER_MAX_AGE seconds
  1151. into the future, now that we are more tolerant of skew. This
  1152. resolves a bug where a Tor server would refuse to cache a directory
  1153. because all the directories it gets are too far in the future;
  1154. yet the Tor server never logs any complaints about clock skew.
  1155. - Mac packaging magic: make man pages useable, and do not overwrite
  1156. existing torrc files.
  1157. - Make OS X log happily to /var/log/tor/tor.log
  1158. Changes in version 0.0.9.5 - 2005-02-22
  1159. o Bugfixes on 0.0.9.x:
  1160. - Fix an assert race at exit nodes when resolve requests fail.
  1161. - Stop picking unverified dir mirrors--it only leads to misery.
  1162. - Patch from Matt Edman to make NT services work better. Service
  1163. support is still not compiled into the executable by default.
  1164. - Patch from Dmitri Bely so the Tor service runs better under
  1165. the win32 SYSTEM account.
  1166. - Make tor-resolve actually work (?) on Win32.
  1167. - Fix a sign bug when getrlimit claims to have 4+ billion
  1168. file descriptors available.
  1169. - Stop refusing to start when bandwidthburst == bandwidthrate.
  1170. - When create cells have been on the onion queue more than five
  1171. seconds, just send back a destroy and take them off the list.
  1172. Changes in version 0.0.9.4 - 2005-02-03
  1173. o Bugfixes on 0.0.9:
  1174. - Fix an assert bug that took down most of our servers: when
  1175. a server claims to have 1 GB of bandwidthburst, don't
  1176. freak out.
  1177. - Don't crash as badly if we have spawned the max allowed number
  1178. of dnsworkers, or we're out of file descriptors.
  1179. - Block more file-sharing ports in the default exit policy.
  1180. - MaxConn is now automatically set to the hard limit of max
  1181. file descriptors we're allowed (ulimit -n), minus a few for
  1182. logs, etc.
  1183. - Give a clearer message when servers need to raise their
  1184. ulimit -n when they start running out of file descriptors.
  1185. - SGI Compatibility patches from Jan Schaumann.
  1186. - Tolerate a corrupt cached directory better.
  1187. - When a dirserver hasn't approved your server, list which one.
  1188. - Go into soft hibernation after 95% of the bandwidth is used,
  1189. not 99%. This is especially important for daily hibernators who
  1190. have a small accounting max. Hopefully it will result in fewer
  1191. cut connections when the hard hibernation starts.
  1192. - Load-balance better when using servers that claim more than
  1193. 800kB/s of capacity.
  1194. - Make NT services work (experimental, only used if compiled in).
  1195. Changes in version 0.0.9.3 - 2005-01-21
  1196. o Bugfixes on 0.0.9:
  1197. - Backport the cpu use fixes from main branch, so busy servers won't
  1198. need as much processor time.
  1199. - Work better when we go offline and then come back, or when we
  1200. run Tor at boot before the network is up. We do this by
  1201. optimistically trying to fetch a new directory whenever an
  1202. application request comes in and we think we're offline -- the
  1203. human is hopefully a good measure of when the network is back.
  1204. - Backport some minimal hidserv bugfixes: keep rend circuits open as
  1205. long as you keep using them; actually publish hidserv descriptors
  1206. shortly after they change, rather than waiting 20-40 minutes.
  1207. - Enable Mac startup script by default.
  1208. - Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
  1209. - When you update AllowUnverifiedNodes or FirewallPorts via the
  1210. controller's setconf feature, we were always appending, never
  1211. resetting.
  1212. - When you update HiddenServiceDir via setconf, it was screwing up
  1213. the order of reading the lines, making it fail.
  1214. - Do not rewrite a cached directory back to the cache; otherwise we
  1215. will think it is recent and not fetch a newer one on startup.
  1216. - Workaround for webservers that lie about Content-Encoding: Tor
  1217. now tries to autodetect compressed directories and compression
  1218. itself. This lets us Proxypass dir fetches through apache.
  1219. Changes in version 0.0.9.2 - 2005-01-04
  1220. o Bugfixes on 0.0.9 (crashes and asserts):
  1221. - Fix an assert on startup when the disk is full and you're logging
  1222. to a file.
  1223. - If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
  1224. style address, then we'd crash.
  1225. - Fix an assert trigger when the running-routers string we get from
  1226. a dirserver is broken.
  1227. - Make worker threads start and run on win32. Now win32 servers
  1228. may work better.
  1229. - Bandaid (not actually fix, but now it doesn't crash) an assert
  1230. where the dns worker dies mysteriously and the main Tor process
  1231. doesn't remember anything about the address it was resolving.
  1232. o Bugfixes on 0.0.9 (Win32):
  1233. - Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
  1234. name out of the warning/assert messages.
  1235. - Fix a superficial "unhandled error on read" bug on win32.
  1236. - The win32 installer no longer requires a click-through for our
  1237. license, since our Free Software license grants rights but does not
  1238. take any away.
  1239. - Win32: When connecting to a dirserver fails, try another one
  1240. immediately. (This was already working for non-win32 Tors.)
  1241. - Stop trying to parse $HOME on win32 when hunting for default
  1242. DataDirectory.
  1243. - Make tor-resolve.c work on win32 by calling network_init().
  1244. o Bugfixes on 0.0.9 (other):
  1245. - Make 0.0.9.x build on Solaris again.
  1246. - Due to a fencepost error, we were blowing away the \n when reporting
  1247. confvalue items in the controller. So asking for multiple config
  1248. values at once couldn't work.
  1249. - When listing circuits that are pending on an opening OR connection,
  1250. if we're an OR we were listing circuits that *end* at us as
  1251. being pending on every listener, dns/cpu worker, etc. Stop that.
  1252. - Dirservers were failing to create 'running-routers' or 'directory'
  1253. strings if we had more than some threshold of routers. Fix them so
  1254. they can handle any number of routers.
  1255. - Fix a superficial "Duplicate mark for close" bug.
  1256. - Stop checking for clock skew for OR connections, even for servers.
  1257. - Fix a fencepost error that was chopping off the last letter of any
  1258. nickname that is the maximum allowed nickname length.
  1259. - Update URLs in log messages so they point to the new website.
  1260. - Fix a potential problem in mangling server private keys while
  1261. writing to disk (not triggered yet, as far as we know).
  1262. - Include the licenses for other free software we include in Tor,
  1263. now that we're shipping binary distributions more regularly.
  1264. Changes in version 0.0.9.1 - 2004-12-15
  1265. o Bugfixes on 0.0.9:
  1266. - Make hibernation actually work.
  1267. - Make HashedControlPassword config option work.
  1268. - When we're reporting event circuit status to a controller,
  1269. don't use the stream status code.
  1270. Changes in version 0.0.9 - 2004-12-12
  1271. o Bugfixes on 0.0.8.1 (Crashes and asserts):
  1272. - Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
  1273. write() call will fail and we handle it there.
  1274. - When we run out of disk space, or other log writing error, don't
  1275. crash. Just stop logging to that log and continue.
  1276. - Fix isspace() and friends so they still make Solaris happy
  1277. but also so they don't trigger asserts on win32.
  1278. - Fix assert failure on malformed socks4a requests.
  1279. - Fix an assert bug where a hidden service provider would fail if
  1280. the first hop of his rendezvous circuit was down.
  1281. - Better handling of size_t vs int, so we're more robust on 64
  1282. bit platforms.
  1283. o Bugfixes on 0.0.8.1 (Win32):
  1284. - Make windows sockets actually non-blocking (oops), and handle
  1285. win32 socket errors better.
  1286. - Fix parse_iso_time on platforms without strptime (eg win32).
  1287. - win32: when being multithreaded, leave parent fdarray open.
  1288. - Better handling of winsock includes on non-MSV win32 compilers.
  1289. - Change our file IO stuff (especially wrt OpenSSL) so win32 is
  1290. happier.
  1291. - Make unit tests work on win32.
  1292. o Bugfixes on 0.0.8.1 (Path selection and streams):
  1293. - Calculate timeout for waiting for a connected cell from the time
  1294. we sent the begin cell, not from the time the stream started. If
  1295. it took a long time to establish the circuit, we would time out
  1296. right after sending the begin cell.
  1297. - Fix router_compare_addr_to_addr_policy: it was not treating a port
  1298. of * as always matching, so we were picking reject *:* nodes as
  1299. exit nodes too. Oops.
  1300. - When read() failed on a stream, we would close it without sending
  1301. back an end. So 'connection refused' would simply be ignored and
  1302. the user would get no response.
  1303. - Stop a sigpipe: when an 'end' cell races with eof from the app,
  1304. we shouldn't hold-open-until-flush if the eof arrived first.
  1305. - Let resolve conns retry/expire also, rather than sticking around
  1306. forever.
  1307. - Fix more dns related bugs: send back resolve_failed and end cells
  1308. more reliably when the resolve fails, rather than closing the
  1309. circuit and then trying to send the cell. Also attach dummy resolve
  1310. connections to a circuit *before* calling dns_resolve(), to fix
  1311. a bug where cached answers would never be sent in RESOLVED cells.
  1312. o Bugfixes on 0.0.8.1 (Circuits):
  1313. - Finally fix a bug that's been plaguing us for a year:
  1314. With high load, circuit package window was reaching 0. Whenever
  1315. we got a circuit-level sendme, we were reading a lot on each
  1316. socket, but only writing out a bit. So we would eventually reach
  1317. eof. This would be noticed and acted on even when there were still
  1318. bytes sitting in the inbuf.
  1319. - Use identity comparison, not nickname comparison, to choose which
  1320. half of circuit-ID-space each side gets to use. This is needed
  1321. because sometimes we think of a router as a nickname, and sometimes
  1322. as a hex ID, and we can't predict what the other side will do.
  1323. o Bugfixes on 0.0.8.1 (Other):
  1324. - Fix a whole slew of memory leaks.
  1325. - Disallow NDEBUG. We don't ever want anybody to turn off debug.
  1326. - If we are using select, make sure we stay within FD_SETSIZE.
  1327. - When poll() is interrupted, we shouldn't believe the revents values.
  1328. - Add a FAST_SMARTLIST define to optionally inline smartlist_get
  1329. and smartlist_len, which are two major profiling offenders.
  1330. - If do_hup fails, actually notice.
  1331. - Flush the log file descriptor after we print "Tor opening log file",
  1332. so we don't see those messages days later.
  1333. - Hidden service operators now correctly handle version 1 style
  1334. INTRODUCE1 cells (nobody generates them still, so not a critical
  1335. bug).
  1336. - Handle more errnos from accept() without closing the listener.
  1337. Some OpenBSD machines were closing their listeners because
  1338. they ran out of file descriptors.
  1339. - Some people had wrapped their tor client/server in a script
  1340. that would restart it whenever it died. This did not play well
  1341. with our "shut down if your version is obsolete" code. Now people
  1342. don't fetch a new directory if their local cached version is
  1343. recent enough.
  1344. - Make our autogen.sh work on ksh as well as bash.
  1345. - Better torrc example lines for dirbindaddress and orbindaddress.
  1346. - Improved bounds checking on parsed ints (e.g. config options and
  1347. the ones we find in directories.)
  1348. - Stop using separate defaults for no-config-file and
  1349. empty-config-file. Now you have to explicitly turn off SocksPort,
  1350. if you don't want it open.
  1351. - We were starting to daemonize before we opened our logs, so if
  1352. there were any problems opening logs, we would complain to stderr,
  1353. which wouldn't work, and then mysteriously exit.
  1354. - If a verified OR connects to us before he's uploaded his descriptor,
  1355. or we verify him and hup but he still has the original TLS
  1356. connection, then conn->nickname is still set like he's unverified.
  1357. o Code security improvements, inspired by Ilja:
  1358. - tor_snprintf wrapper over snprintf with consistent (though not C99)
  1359. overflow behavior.
  1360. - Replace sprintf with tor_snprintf. (I think they were all safe, but
  1361. hey.)
  1362. - Replace strcpy/strncpy with strlcpy in more places.
  1363. - Avoid strcat; use tor_snprintf or strlcat instead.
  1364. o Features (circuits and streams):
  1365. - New circuit building strategy: keep a list of ports that we've
  1366. used in the past 6 hours, and always try to have 2 circuits open
  1367. or on the way that will handle each such port. Seed us with port
  1368. 80 so web users won't complain that Tor is "slow to start up".
  1369. - Make kill -USR1 dump more useful stats about circuits.
  1370. - When warning about retrying or giving up, print the address, so
  1371. the user knows which one it's talking about.
  1372. - If you haven't used a clean circuit in an hour, throw it away,
  1373. just to be on the safe side. (This means after 6 hours a totally
  1374. unused Tor client will have no circuits open.)
  1375. - Support "foo.nickname.exit" addresses, to let Alice request the
  1376. address "foo" as viewed by exit node "nickname". Based on a patch
  1377. from Geoff Goodell.
  1378. - If your requested entry or exit node has advertised bandwidth 0,
  1379. pick it anyway.
  1380. - Be more greedy about filling up relay cells -- we try reading again
  1381. once we've processed the stuff we read, in case enough has arrived
  1382. to fill the last cell completely.
  1383. - Refuse application socks connections to port 0.
  1384. - Use only 0.0.9pre1 and later servers for resolve cells.
  1385. o Features (bandwidth):
  1386. - Hibernation: New config option "AccountingMax" lets you
  1387. set how many bytes per month (in each direction) you want to
  1388. allow your server to consume. Rather than spreading those
  1389. bytes out evenly over the month, we instead hibernate for some
  1390. of the month and pop up at a deterministic time, work until
  1391. the bytes are consumed, then hibernate again. Config option
  1392. "MonthlyAccountingStart" lets you specify which day of the month
  1393. your billing cycle starts on.
  1394. - Implement weekly/monthly/daily accounting: now you specify your
  1395. hibernation properties by
  1396. AccountingMax N bytes|KB|MB|GB|TB
  1397. AccountingStart day|week|month [day] HH:MM
  1398. Defaults to "month 1 0:00".
  1399. - Let bandwidth and interval config options be specified as 5 bytes,
  1400. kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
  1401. o Features (directories):
  1402. - New "router-status" line in directory, to better bind each verified
  1403. nickname to its identity key.
  1404. - Clients can ask dirservers for /dir.z to get a compressed version
  1405. of the directory. Only works for servers running 0.0.9, of course.
  1406. - Make clients cache directories and use them to seed their router
  1407. lists at startup. This means clients have a datadir again.
  1408. - Respond to content-encoding headers by trying to uncompress as
  1409. appropriate.
  1410. - Clients and servers now fetch running-routers; cache
  1411. running-routers; compress running-routers; serve compressed
  1412. running-routers.z
  1413. - Make moria2 advertise a dirport of 80, so people behind firewalls
  1414. will be able to get a directory.
  1415. - Http proxy support
  1416. - Dirservers translate requests for http://%s:%d/x to /x
  1417. - You can specify "HttpProxy %s[:%d]" and all dir fetches will
  1418. be routed through this host.
  1419. - Clients ask for /tor/x rather than /x for new enough dirservers.
  1420. This way we can one day coexist peacefully with apache.
  1421. - Clients specify a "Host: %s%d" http header, to be compatible
  1422. with more proxies, and so running squid on an exit node can work.
  1423. - Protect dirservers from overzealous descriptor uploading -- wait
  1424. 10 seconds after directory gets dirty, before regenerating.
  1425. o Features (packages and install):
  1426. - Add NSI installer contributed by J Doe.
  1427. - Apply NT service patch from Osamu Fujino. Still needs more work.
  1428. - Commit VC6 and VC7 workspace/project files.
  1429. - Commit a tor.spec for making RPM files, with help from jbash.
  1430. - Add contrib/torctl.in contributed by Glenn Fink.
  1431. - Make expand_filename handle ~ and ~username.
  1432. - Use autoconf to enable largefile support where necessary. Use
  1433. ftello where available, since ftell can fail at 2GB.
  1434. - Ship src/win32/ in the tarball, so people can use it to build.
  1435. - Make old win32 fall back to CWD if SHGetSpecialFolderLocation
  1436. is broken.
  1437. o Features (ui controller):
  1438. - Control interface: a separate program can now talk to your
  1439. client/server over a socket, and get/set config options, receive
  1440. notifications of circuits and streams starting/finishing/dying,
  1441. bandwidth used, etc. The next step is to get some GUIs working.
  1442. Let us know if you want to help out. See doc/control-spec.txt .
  1443. - Ship a contrib/tor-control.py as an example script to interact
  1444. with the control port.
  1445. - "tor --hash-password zzyxz" will output a salted password for
  1446. use in authenticating to the control interface.
  1447. - Implement the control-spec's SAVECONF command, to write your
  1448. configuration to torrc.
  1449. - Get cookie authentication for the controller closer to working.
  1450. - When set_conf changes our server descriptor, upload a new copy.
  1451. But don't upload it too often if there are frequent changes.
  1452. o Features (config and command-line):
  1453. - Deprecate unofficial config option abbreviations, and abbreviations
  1454. not on the command line.
  1455. - Configuration infrastructure support for warning on obsolete
  1456. options.
  1457. - Give a slightly more useful output for "tor -h".
  1458. - Break DirFetchPostPeriod into:
  1459. - DirFetchPeriod for fetching full directory,
  1460. - StatusFetchPeriod for fetching running-routers,
  1461. - DirPostPeriod for posting server descriptor,
  1462. - RendPostPeriod for posting hidden service descriptors.
  1463. - New log format in config:
  1464. "Log minsev[-maxsev] stdout|stderr|syslog" or
  1465. "Log minsev[-maxsev] file /var/foo"
  1466. - DirPolicy config option, to let people reject incoming addresses
  1467. from their dirserver.
  1468. - "tor --list-fingerprint" will list your identity key fingerprint
  1469. and then exit.
  1470. - Make tor --version --version dump the cvs Id of every file.
  1471. - New 'MyFamily nick1,...' config option for a server to
  1472. specify other servers that shouldn't be used in the same circuit
  1473. with it. Only believed if nick1 also specifies us.
  1474. - New 'NodeFamily nick1,nick2,...' config option for a client to
  1475. specify nodes that it doesn't want to use in the same circuit.
  1476. - New 'Redirectexit pattern address:port' config option for a
  1477. server to redirect exit connections, e.g. to a local squid.
  1478. - Add "pass" target for RedirectExit, to make it easier to break
  1479. out of a sequence of RedirectExit rules.
  1480. - Make the dirservers file obsolete.
  1481. - Include a dir-signing-key token in directories to tell the
  1482. parsing entity which key is being used to sign.
  1483. - Remove the built-in bulky default dirservers string.
  1484. - New config option "Dirserver %s:%d [fingerprint]", which can be
  1485. repeated as many times as needed. If no dirservers specified,
  1486. default to moria1,moria2,tor26.
  1487. - Make 'Routerfile' config option obsolete.
  1488. - Discourage people from setting their dirfetchpostperiod more often
  1489. than once per minute.
  1490. o Features (other):
  1491. - kill -USR2 now moves all logs to loglevel debug (kill -HUP to
  1492. get back to normal.)
  1493. - Accept *:706 (silc) in default exit policy.
  1494. - Implement new versioning format for post 0.1.
  1495. - Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
  1496. log more informatively.
  1497. - Check clock skew for verified servers, but allow unverified
  1498. servers and clients to have any clock skew.
  1499. - Make sure the hidden service descriptors are at a random offset
  1500. from each other, to hinder linkability.
  1501. - Clients now generate a TLS cert too, in preparation for having
  1502. them act more like real nodes.
  1503. - Add a pure-C tor-resolve implementation.
  1504. - Use getrlimit and friends to ensure we can reach MaxConn (currently
  1505. 1024) file descriptors.
  1506. - Raise the max dns workers from 50 to 100.
  1507. Changes in version 0.0.8.1 - 2004-10-13
  1508. o Bugfixes:
  1509. - Fix a seg fault that can be triggered remotely for Tor
  1510. clients/servers with an open dirport.
  1511. - Fix a rare assert trigger, where routerinfos for entries in
  1512. our cpath would expire while we're building the path.
  1513. - Fix a bug in OutboundBindAddress so it (hopefully) works.
  1514. - Fix a rare seg fault for people running hidden services on
  1515. intermittent connections.
  1516. - Fix a bug in parsing opt keywords with objects.
  1517. - Fix a stale pointer assert bug when a stream detaches and
  1518. reattaches.
  1519. - Fix a string format vulnerability (probably not exploitable)
  1520. in reporting stats locally.
  1521. - Fix an assert trigger: sometimes launching circuits can fail
  1522. immediately, e.g. because too many circuits have failed recently.
  1523. - Fix a compile warning on 64 bit platforms.
  1524. Changes in version 0.0.8 - 2004-08-25
  1525. o Bugfixes:
  1526. - Made our unit tests compile again on OpenBSD 3.5, and tor
  1527. itself compile again on OpenBSD on a sparc64.
  1528. - We were neglecting milliseconds when logging on win32, so
  1529. everything appeared to happen at the beginning of each second.
  1530. - Check directory signature _before_ you decide whether you're
  1531. you're running an obsolete version and should exit.
  1532. - Check directory signature _before_ you parse the running-routers
  1533. list to decide who's running.
  1534. - Check return value of fclose while writing to disk, so we don't
  1535. end up with broken files when servers run out of disk space.
  1536. - Port it to SunOS 5.9 / Athena
  1537. - Fix two bugs in saving onion keys to disk when rotating, so
  1538. hopefully we'll get fewer people using old onion keys.
  1539. - Remove our mostly unused -- and broken -- hex_encode()
  1540. function. Use base16_encode() instead. (Thanks to Timo Lindfors
  1541. for pointing out this bug.)
  1542. - Only pick and establish intro points after we've gotten a
  1543. directory.
  1544. - Fix assert triggers: if the other side returns an address 0.0.0.0,
  1545. don't put it into the client dns cache.
  1546. - If a begin failed due to exit policy, but we believe the IP
  1547. address should have been allowed, switch that router to exitpolicy
  1548. reject *:* until we get our next directory.
  1549. o Protocol changes:
  1550. - 'Extend' relay cell payloads now include the digest of the
  1551. intended next hop's identity key. Now we can verify that we're
  1552. extending to the right router, and also extend to routers we
  1553. hadn't heard of before.
  1554. o Features:
  1555. - Tor nodes can now act as relays (with an advertised ORPort)
  1556. without being manually verified by the dirserver operators.
  1557. - Uploaded descriptors of unverified routers are now accepted
  1558. by the dirservers, and included in the directory.
  1559. - Verified routers are listed by nickname in the running-routers
  1560. list; unverified routers are listed as "$<fingerprint>".
  1561. - We now use hash-of-identity-key in most places rather than
  1562. nickname or addr:port, for improved security/flexibility.
  1563. - AllowUnverifiedNodes config option to let circuits choose no-name
  1564. routers in entry,middle,exit,introduction,rendezvous positions.
  1565. Allow middle and rendezvous positions by default.
  1566. - When picking unverified routers, skip those with low uptime and/or
  1567. low bandwidth, depending on what properties you care about.
  1568. - ClientOnly option for nodes that never want to become servers.
  1569. - Directory caching.
  1570. - "AuthoritativeDir 1" option for the official dirservers.
  1571. - Now other nodes (clients and servers) will cache the latest
  1572. directory they've pulled down.
  1573. - They can enable their DirPort to serve it to others.
  1574. - Clients will pull down a directory from any node with an open
  1575. DirPort, and check the signature/timestamp correctly.
  1576. - Authoritative dirservers now fetch directories from other
  1577. authdirservers, to stay better synced.
  1578. - Running-routers list tells who's down also, along with noting
  1579. if they're verified (listed by nickname) or unverified (listed
  1580. by hash-of-key).
  1581. - Allow dirservers to serve running-router list separately.
  1582. This isn't used yet.
  1583. - You can now fetch $DIRURL/running-routers to get just the
  1584. running-routers line, not the whole descriptor list. (But
  1585. clients don't use this yet.)
  1586. - Clients choose nodes proportional to advertised bandwidth.
  1587. - Clients avoid using nodes with low uptime as introduction points.
  1588. - Handle servers with dynamic IP addresses: don't just replace
  1589. options->Address with the resolved one at startup, and
  1590. detect our address right before we make a routerinfo each time.
  1591. - 'FascistFirewall' option to pick dirservers and ORs on specific
  1592. ports; plus 'FirewallPorts' config option to tell FascistFirewall
  1593. which ports are open. (Defaults to 80,443)
  1594. - Try other dirservers immediately if the one you try is down. This
  1595. should tolerate down dirservers better now.
  1596. - ORs connect-on-demand to other ORs
  1597. - If you get an extend cell to an OR you're not connected to,
  1598. connect, handshake, and forward the create cell.
  1599. - The authoritative dirservers stay connected to everybody,
  1600. and everybody stays connected to 0.0.7 servers, but otherwise
  1601. clients/servers expire unused connections after 5 minutes.
  1602. - When servers get a sigint, they delay 30 seconds (refusing new
  1603. connections) then exit. A second sigint causes immediate exit.
  1604. - File and name management:
  1605. - Look for .torrc if no CONFDIR "torrc" is found.
  1606. - If no datadir is defined, then choose, make, and secure ~/.tor
  1607. as datadir.
  1608. - If torrc not found, exitpolicy reject *:*.
  1609. - Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
  1610. - If no nickname is defined, derive default from hostname.
  1611. - Rename secret key files, e.g. identity.key -> secret_id_key,
  1612. to discourage people from mailing their identity key to tor-ops.
  1613. - Refuse to build a circuit before the directory has arrived --
  1614. it won't work anyway, since you won't know the right onion keys
  1615. to use.
  1616. - Parse tor version numbers so we can do an is-newer-than check
  1617. rather than an is-in-the-list check.
  1618. - New socks command 'resolve', to let us shim gethostbyname()
  1619. locally.
  1620. - A 'tor_resolve' script to access the socks resolve functionality.
  1621. - A new socks-extensions.txt doc file to describe our
  1622. interpretation and extensions to the socks protocols.
  1623. - Add a ContactInfo option, which gets published in descriptor.
  1624. - Write tor version at the top of each log file
  1625. - New docs in the tarball:
  1626. - tor-doc.html.
  1627. - Document that you should proxy your SSL traffic too.
  1628. - Log a warning if the user uses an unsafe socks variant, so people
  1629. are more likely to learn about privoxy or socat.
  1630. - Log a warning if you're running an unverified server, to let you
  1631. know you might want to get it verified.
  1632. - Change the default exit policy to reject the default edonkey,
  1633. kazaa, gnutella ports.
  1634. - Add replace_file() to util.[ch] to handle win32's rename().
  1635. - Publish OR uptime in descriptor (and thus in directory) too.
  1636. - Remember used bandwidth (both in and out), and publish 15-minute
  1637. snapshots for the past day into our descriptor.
  1638. - Be more aggressive about trying to make circuits when the network
  1639. has changed (e.g. when you unsuspend your laptop).
  1640. - Check for time skew on http headers; report date in response to
  1641. "GET /".
  1642. - If the entrynode config line has only one node, don't pick it as
  1643. an exitnode.
  1644. - Add strict{entry|exit}nodes config options. If set to 1, then
  1645. we refuse to build circuits that don't include the specified entry
  1646. or exit nodes.
  1647. - OutboundBindAddress config option, to bind to a specific
  1648. IP address for outgoing connect()s.
  1649. - End truncated log entries (e.g. directories) with "[truncated]".
  1650. Changes in version 0.0.7.3 - 2004-08-12
  1651. o Stop dnsworkers from triggering an assert failure when you
  1652. ask them to resolve the host "".
  1653. Changes in version 0.0.7.2 - 2004-07-07
  1654. o A better fix for the 0.0.0.0 problem, that will hopefully
  1655. eliminate the remaining related assertion failures.
  1656. Changes in version 0.0.7.1 - 2004-07-04
  1657. o When an address resolves to 0.0.0.0, treat it as a failed resolve,
  1658. since internally we use 0.0.0.0 to signify "not yet resolved".
  1659. Changes in version 0.0.7 - 2004-06-07
  1660. o Fixes for crashes and other obnoxious bugs:
  1661. - Fix an epipe bug: sometimes when directory connections failed
  1662. to connect, we would give them a chance to flush before closing
  1663. them.
  1664. - When we detached from a circuit because of resolvefailed, we
  1665. would immediately try the same circuit twice more, and then
  1666. give up on the resolve thinking we'd tried three different
  1667. exit nodes.
  1668. - Limit the number of intro circuits we'll attempt to build for a
  1669. hidden service per 15-minute period.
  1670. - Check recommended-software string *early*, before actually parsing
  1671. the directory. Thus we can detect an obsolete version and exit,
  1672. even if the new directory format doesn't parse.
  1673. o Fixes for security bugs:
  1674. - Remember which nodes are dirservers when you startup, and if a
  1675. random OR enables his dirport, don't automatically assume he's
  1676. a trusted dirserver.
  1677. o Other bugfixes:
  1678. - Directory connections were asking the wrong poll socket to
  1679. start writing, and not asking themselves to start writing.
  1680. - When we detached from a circuit because we sent a begin but
  1681. didn't get a connected, we would use it again the first time;
  1682. but after that we would correctly switch to a different one.
  1683. - Stop warning when the first onion decrypt attempt fails; they
  1684. will sometimes legitimately fail now that we rotate keys.
  1685. - Override unaligned-access-ok check when $host_cpu is ia64 or
  1686. arm. Apparently they allow it but the kernel whines.
  1687. - Dirservers try to reconnect periodically too, in case connections
  1688. have failed.
  1689. - Fix some memory leaks in directory servers.
  1690. - Allow backslash in Win32 filenames.
  1691. - Made Tor build complain-free on FreeBSD, hopefully without
  1692. breaking other BSD builds. We'll see.
  1693. - Check directory signatures based on name of signer, not on whom
  1694. we got the directory from. This will let us cache directories more
  1695. easily.
  1696. - Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
  1697. settings too.
  1698. o Features:
  1699. - Doxygen markup on all functions and global variables.
  1700. - Make directory functions update routerlist, not replace it. So
  1701. now directory disagreements are not so critical a problem.
  1702. - Remove the upper limit on number of descriptors in a dirserver's
  1703. directory (not that we were anywhere close).
  1704. - Allow multiple logfiles at different severity ranges.
  1705. - Allow *BindAddress to specify ":port" rather than setting *Port
  1706. separately. Allow multiple instances of each BindAddress config
  1707. option, so you can bind to multiple interfaces if you want.
  1708. - Allow multiple exit policy lines, which are processed in order.
  1709. Now we don't need that huge line with all the commas in it.
  1710. - Enable accept/reject policies on SOCKS connections, so you can bind
  1711. to 0.0.0.0 but still control who can use your OP.
  1712. - Updated the man page to reflect these features.
  1713. Changes in version 0.0.6.2 - 2004-05-16
  1714. o Our integrity-checking digest was checking only the most recent cell,
  1715. not the previous cells like we'd thought.
  1716. Thanks to Stefan Mark for finding the flaw!
  1717. Changes in version 0.0.6.1 - 2004-05-06
  1718. o Fix two bugs in our AES counter-mode implementation (this affected
  1719. onion-level stream encryption, but not TLS-level). It turns
  1720. out we were doing something much more akin to a 16-character
  1721. polyalphabetic cipher. Oops.
  1722. Thanks to Stefan Mark for finding the flaw!
  1723. o Retire moria3 as a directory server, and add tor26 as a directory
  1724. server.
  1725. Changes in version 0.0.6 - 2004-05-02
  1726. o Features:
  1727. - Hidden services and rendezvous points are implemented. Go to
  1728. http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
  1729. hidden services. (This only works via a socks4a proxy such as
  1730. Privoxy, and currently it's quite slow.)
  1731. - We now rotate link (tls context) keys and onion keys.
  1732. - CREATE cells now include oaep padding, so you can tell
  1733. if you decrypted them correctly.
  1734. - Retry stream correctly when we fail to connect because of
  1735. exit-policy-reject (should try another) or can't-resolve-address.
  1736. - When we hup a dirserver and we've *removed* a server from the
  1737. approved-routers list, now we remove that server from the
  1738. in-memory directories too.
  1739. - Add bandwidthburst to server descriptor.
  1740. - Directories now say which dirserver signed them.
  1741. - Use a tor_assert macro that logs failed assertions too.
  1742. - Since we don't support truncateds much, don't bother sending them;
  1743. just close the circ.
  1744. - Fetch randomness from /dev/urandom better (not via fopen/fread)
  1745. - Better debugging for tls errors
  1746. - Set Content-Type on the directory and hidserv descriptor.
  1747. - Remove IVs from cipher code, since AES-ctr has none.
  1748. o Bugfixes:
  1749. - Fix an assert trigger for exit nodes that's been plaguing us since
  1750. the days of 0.0.2prexx (thanks weasel!)
  1751. - Fix a bug where we were closing tls connections intermittently.
  1752. It turns out openssl keeps its errors around -- so if an error
  1753. happens, and you don't ask about it, and then another openssl
  1754. operation happens and succeeds, and you ask if there was an error,
  1755. it tells you about the first error.
  1756. - Fix a bug that's been lurking since 27 may 03 (!)
  1757. When passing back a destroy cell, we would use the wrong circ id.
  1758. - Don't crash if a conn that sent a begin has suddenly lost its circuit.
  1759. - Some versions of openssl have an SSL_pending function that erroneously
  1760. returns bytes when there is a non-application record pending.
  1761. - Win32 fixes. Tor now compiles on win32 with no warnings/errors.
  1762. o We were using an array of length zero in a few places.
  1763. o Win32's gethostbyname can't resolve an IP to an IP.
  1764. o Win32's close can't close a socket.
  1765. o Handle windows socket errors correctly.
  1766. o Portability:
  1767. - check for <sys/limits.h> so we build on FreeBSD again, and
  1768. <machine/limits.h> for NetBSD.
  1769. Changes in version 0.0.5 - 2004-03-30
  1770. o Install torrc as torrc.sample -- we no longer clobber your
  1771. torrc. (Woo!)
  1772. o Fix mangled-state bug in directory fetching (was causing sigpipes).
  1773. o Only build circuits after we've fetched the directory: clients were
  1774. using only the directory servers before they'd fetched a directory.
  1775. This also means longer startup time; so it goes.
  1776. o Fix an assert trigger where an OP would fail to handshake, and we'd
  1777. expect it to have a nickname.
  1778. o Work around a tsocks bug: do a socks reject when AP connection dies
  1779. early, else tsocks goes into an infinite loop.
  1780. o Hold socks connection open until reply is flushed (if possible)
  1781. o Make exit nodes resolve IPs to IPs immediately, rather than asking
  1782. the dns farm to do it.
  1783. o Fix c99 aliasing warnings in rephist.c
  1784. o Don't include server descriptors that are older than 24 hours in the
  1785. directory.
  1786. o Give socks 'reject' replies their whole 15s to attempt to flush,
  1787. rather than seeing the 60s timeout and assuming the flush had failed.
  1788. o Clean automake droppings from the cvs repository
  1789. o Add in a 'notice' log level for things the operator should hear
  1790. but that aren't warnings
  1791. Changes in version 0.0.4 - 2004-03-26
  1792. o When connecting to a dirserver or OR and the network is down,
  1793. we would crash.
  1794. Changes in version 0.0.3 - 2004-03-26
  1795. o Warn and fail if server chose a nickname with illegal characters
  1796. o Port to Solaris and Sparc:
  1797. - include missing header fcntl.h
  1798. - have autoconf find -lsocket -lnsl automatically
  1799. - deal with hardware word alignment
  1800. - make uname() work (solaris has a different return convention)
  1801. - switch from using signal() to sigaction()
  1802. o Preliminary work on reputation system:
  1803. - Keep statistics on success/fail of connect attempts; they're published
  1804. by kill -USR1 currently.
  1805. - Add a RunTesting option to try to learn link state by creating test
  1806. circuits, even when SocksPort is off.
  1807. - Remove unused open circuits when there are too many.
  1808. Changes in version 0.0.2 - 2004-03-19
  1809. - Include strlcpy and strlcat for safer string ops
  1810. - define INADDR_NONE so we compile (but still not run) on solaris
  1811. Changes in version 0.0.2pre27 - 2004-03-14
  1812. o Bugfixes:
  1813. - Allow internal tor networks (we were rejecting internal IPs,
  1814. now we allow them if they're set explicitly).
  1815. - And fix a few endian issues.
  1816. Changes in version 0.0.2pre26 - 2004-03-14
  1817. o New features:
  1818. - If a stream times out after 15s without a connected cell, don't
  1819. try that circuit again: try a new one.
  1820. - Retry streams at most 4 times. Then give up.
  1821. - When a dirserver gets a descriptor from an unknown router, it
  1822. logs its fingerprint (so the dirserver operator can choose to
  1823. accept it even without mail from the server operator).
  1824. - Inform unapproved servers when we reject their descriptors.
  1825. - Make tor build on Windows again. It works as a client, who knows
  1826. about as a server.
  1827. - Clearer instructions in the torrc for how to set up a server.
  1828. - Be more efficient about reading fd's when our global token bucket
  1829. (used for rate limiting) becomes empty.
  1830. o Bugfixes:
  1831. - Stop asserting that computers always go forward in time. It's
  1832. simply not true.
  1833. - When we sent a cell (e.g. destroy) and then marked an OR connection
  1834. expired, we might close it before finishing a flush if the other
  1835. side isn't reading right then.
  1836. - Don't allow dirservers to start if they haven't defined
  1837. RecommendedVersions
  1838. - We were caching transient dns failures. Oops.
  1839. - Prevent servers from publishing an internal IP as their address.
  1840. - Address a strcat vulnerability in circuit.c
  1841. Changes in version 0.0.2pre25 - 2004-03-04
  1842. o New features:
  1843. - Put the OR's IP in its router descriptor, not its fqdn. That way
  1844. we'll stop being stalled by gethostbyname for nodes with flaky dns,
  1845. e.g. poblano.
  1846. o Bugfixes:
  1847. - If the user typed in an address that didn't resolve, the server
  1848. crashed.
  1849. Changes in version 0.0.2pre24 - 2004-03-03
  1850. o Bugfixes:
  1851. - Fix an assertion failure in dns.c, where we were trying to dequeue
  1852. a pending dns resolve even if it wasn't pending
  1853. - Fix a spurious socks5 warning about still trying to write after the
  1854. connection is finished.
  1855. - Hold certain marked_for_close connections open until they're finished
  1856. flushing, rather than losing bytes by closing them too early.
  1857. - Correctly report the reason for ending a stream
  1858. - Remove some duplicate calls to connection_mark_for_close
  1859. - Put switch_id and start_daemon earlier in the boot sequence, so it
  1860. will actually try to chdir() to options.DataDirectory
  1861. - Make 'make test' exit(1) if a test fails; fix some unit tests
  1862. - Make tor fail when you use a config option it doesn't know about,
  1863. rather than warn and continue.
  1864. - Make --version work
  1865. - Bugfixes on the rpm spec file and tor.sh, so it's more up to date
  1866. Changes in version 0.0.2pre23 - 2004-02-29
  1867. o New features:
  1868. - Print a statement when the first circ is finished, so the user
  1869. knows it's working.
  1870. - If a relay cell is unrecognized at the end of the circuit,
  1871. send back a destroy. (So attacks to mutate cells are more
  1872. clearly thwarted.)
  1873. - New config option 'excludenodes' to avoid certain nodes for circuits.
  1874. - When it daemonizes, it chdir's to the DataDirectory rather than "/",
  1875. so you can collect coredumps there.
  1876. o Bugfixes:
  1877. - Fix a bug in tls flushing where sometimes data got wedged and
  1878. didn't flush until more data got sent. Hopefully this bug was
  1879. a big factor in the random delays we were seeing.
  1880. - Make 'connected' cells include the resolved IP, so the client
  1881. dns cache actually gets populated.
  1882. - Disallow changing from ORPort=0 to ORPort>0 on hup.
  1883. - When we time-out on a stream and detach from the circuit, send an
  1884. end cell down it first.
  1885. - Only warn about an unknown router (in exitnodes, entrynodes,
  1886. excludenodes) after we've fetched a directory.
  1887. Changes in version 0.0.2pre22 - 2004-02-26
  1888. o New features:
  1889. - Servers publish less revealing uname information in descriptors.
  1890. - More memory tracking and assertions, to crash more usefully when
  1891. errors happen.
  1892. - If the default torrc isn't there, just use some default defaults.
  1893. Plus provide an internal dirservers file if they don't have one.
  1894. - When the user tries to use Tor as an http proxy, give them an http
  1895. 501 failure explaining that we're a socks proxy.
  1896. - Dump a new router.desc on hup, to help confused people who change
  1897. their exit policies and then wonder why router.desc doesn't reflect
  1898. it.
  1899. - Clean up the generic tor.sh init script that we ship with.
  1900. o Bugfixes:
  1901. - If the exit stream is pending on the resolve, and a destroy arrives,
  1902. then the stream wasn't getting removed from the pending list. I
  1903. think this was the one causing recent server crashes.
  1904. - Use a more robust poll on OSX 10.3, since their poll is flaky.
  1905. - When it couldn't resolve any dirservers, it was useless from then on.
  1906. Now it reloads the RouterFile (or default dirservers) if it has no
  1907. dirservers.
  1908. - Move the 'tor' binary back to /usr/local/bin/ -- it turns out
  1909. many users don't even *have* a /usr/local/sbin/.
  1910. Changes in version 0.0.2pre21 - 2004-02-18
  1911. o New features:
  1912. - There's a ChangeLog file that actually reflects the changelog.
  1913. - There's a 'torify' wrapper script, with an accompanying
  1914. tor-tsocks.conf, that simplifies the process of using tsocks for
  1915. tor. It even has a man page.
  1916. - The tor binary gets installed to sbin rather than bin now.
  1917. - Retry streams where the connected cell hasn't arrived in 15 seconds
  1918. - Clean up exit policy handling -- get the default out of the torrc,
  1919. so we can update it without forcing each server operator to fix
  1920. his/her torrc.
  1921. - Allow imaps and pop3s in default exit policy
  1922. o Bugfixes:
  1923. - Prevent picking middleman nodes as the last node in the circuit
  1924. Changes in version 0.0.2pre20 - 2004-01-30
  1925. o New features:
  1926. - We now have a deb package, and it's in debian unstable. Go to
  1927. it, apt-getters. :)
  1928. - I've split the TotalBandwidth option into BandwidthRate (how many
  1929. bytes per second you want to allow, long-term) and
  1930. BandwidthBurst (how many bytes you will allow at once before the cap
  1931. kicks in). This better token bucket approach lets you, say, set
  1932. BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
  1933. performance while not exceeding your monthly bandwidth quota.
  1934. - Push out a tls record's worth of data once you've got it, rather
  1935. than waiting until you've read everything waiting to be read. This
  1936. may improve performance by pipelining better. We'll see.
  1937. - Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
  1938. from failed circuits (if they haven't been connected yet) and attach
  1939. to new ones.
  1940. - Expire old streams that haven't managed to connect. Some day we'll
  1941. have them reattach to new circuits instead.
  1942. o Bugfixes:
  1943. - Fix several memory leaks that were causing servers to become bloated
  1944. after a while.
  1945. - Fix a few very rare assert triggers. A few more remain.
  1946. - Setuid to User _before_ complaining about running as root.
  1947. Changes in version 0.0.2pre19 - 2004-01-07
  1948. o Bugfixes:
  1949. - Fix deadlock condition in dns farm. We were telling a child to die by
  1950. closing the parent's file descriptor to him. But newer children were
  1951. inheriting the open file descriptor from the parent, and since they
  1952. weren't closing it, the socket never closed, so the child never read
  1953. eof, so he never knew to exit. Similarly, dns workers were holding
  1954. open other sockets, leading to all sorts of chaos.
  1955. - New cleaner daemon() code for forking and backgrounding.
  1956. - If you log to a file, it now prints an entry at the top of the
  1957. logfile so you know it's working.
  1958. - The onionskin challenge length was 30 bytes longer than necessary.
  1959. - Started to patch up the spec so it's not quite so out of date.
  1960. Changes in version 0.0.2pre18 - 2004-01-02
  1961. o Bugfixes:
  1962. - Fix endian issues with the 'integrity' field in the relay header.
  1963. - Fix a potential bug where connections in state
  1964. AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
  1965. Changes in version 0.0.2pre17 - 2003-12-30
  1966. o Bugfixes:
  1967. - Made --debuglogfile (or any second log file, actually) work.
  1968. - Resolved an edge case in get_unique_circ_id_by_conn where a smart
  1969. adversary could force us into an infinite loop.
  1970. o Features:
  1971. - Each onionskin handshake now includes a hash of the computed key,
  1972. to prove the server's identity and help perfect forward secrecy.
  1973. - Changed cell size from 256 to 512 bytes (working toward compatibility
  1974. with MorphMix).
  1975. - Changed cell length to 2 bytes, and moved it to the relay header.
  1976. - Implemented end-to-end integrity checking for the payloads of
  1977. relay cells.
  1978. - Separated streamid from 'recognized' (otherwise circuits will get
  1979. messed up when we try to have streams exit from the middle). We
  1980. use the integrity-checking to confirm that a cell is addressed to
  1981. this hop.
  1982. - Randomize the initial circid and streamid values, so an adversary who
  1983. breaks into a node can't learn how many circuits or streams have
  1984. been made so far.
  1985. Changes in version 0.0.2pre16 - 2003-12-14
  1986. o Bugfixes:
  1987. - Fixed a bug that made HUP trigger an assert
  1988. - Fixed a bug where a circuit that immediately failed wasn't being
  1989. counted as a failed circuit in counting retries.
  1990. o Features:
  1991. - Now we close the circuit when we get a truncated cell: otherwise we're
  1992. open to an anonymity attack where a bad node in the path truncates
  1993. the circuit and then we open streams at him.
  1994. - Add port ranges to exit policies
  1995. - Add a conservative default exit policy
  1996. - Warn if you're running tor as root
  1997. - on HUP, retry OR connections and close/rebind listeners
  1998. - options.EntryNodes: try these nodes first when picking the first node
  1999. - options.ExitNodes: if your best choices happen to include any of
  2000. your preferred exit nodes, you choose among just those preferred
  2001. exit nodes.
  2002. - options.ExcludedNodes: nodes that are never picked in path building
  2003. Changes in version 0.0.2pre15 - 2003-12-03
  2004. o Robustness and bugfixes:
  2005. - Sometimes clients would cache incorrect DNS resolves, which would
  2006. really screw things up.
  2007. - An OP that goes offline would slowly leak all its sockets and stop
  2008. working.
  2009. - A wide variety of bugfixes in exit node selection, exit policy
  2010. handling, and processing pending streams when a new circuit is
  2011. established.
  2012. - Pick nodes for a path only from those the directory says are up
  2013. - Choose randomly from all running dirservers, not always the first one
  2014. - Increase allowed http header size for directory fetch.
  2015. - Stop writing to stderr (if we're daemonized it will be closed).
  2016. - Enable -g always, so cores will be more useful to me.
  2017. - Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
  2018. o Documentation:
  2019. - Wrote a man page. It lists commonly used options.
  2020. o Configuration:
  2021. - Change default loglevel to warn.
  2022. - Make PidFile default to null rather than littering in your CWD.
  2023. - OnionRouter config option is now obsolete. Instead it just checks
  2024. ORPort>0.
  2025. - Moved to a single unified torrc file for both clients and servers.
  2026. Changes in version 0.0.2pre14 - 2003-11-29
  2027. o Robustness and bugfixes:
  2028. - Force the admin to make the DataDirectory himself
  2029. - to get ownership/permissions right
  2030. - so clients no longer make a DataDirectory and then never use it
  2031. - fix bug where a client who was offline for 45 minutes would never
  2032. pull down a directory again
  2033. - fix (or at least hide really well) the dns assert bug that was
  2034. causing server crashes
  2035. - warnings and improved robustness wrt clockskew for certs
  2036. - use the native daemon(3) to daemonize, when available
  2037. - exit if bind() fails
  2038. - exit if neither socksport nor orport is defined
  2039. - include our own tor_timegm (Win32 doesn't have its own)
  2040. - bugfix for win32 with lots of connections
  2041. - fix minor bias in PRNG
  2042. - make dirserver more robust to corrupt cached directory
  2043. o Documentation:
  2044. - Wrote the design document (woo)
  2045. o Circuit building and exit policies:
  2046. - Circuits no longer try to use nodes that the directory has told them
  2047. are down.
  2048. - Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
  2049. bitcounts (18.0.0.0/8).
  2050. - Make AP connections standby for a circuit if no suitable circuit
  2051. exists, rather than failing
  2052. - Circuits choose exit node based on addr/port, exit policies, and
  2053. which AP connections are standing by
  2054. - Bump min pathlen from 2 to 3
  2055. - Relay end cells have a payload to describe why the stream ended.
  2056. - If the stream failed because of exit policy, try again with a new
  2057. circuit.
  2058. - Clients have a dns cache to remember resolved addresses.
  2059. - Notice more quickly when we have no working circuits
  2060. o Configuration:
  2061. - APPort is now called SocksPort
  2062. - SocksBindAddress, ORBindAddress, DirBindAddress let you configure
  2063. where to bind
  2064. - RecommendedVersions is now a config variable rather than
  2065. hardcoded (for dirservers)
  2066. - Reloads config on HUP
  2067. - Usage info on -h or --help
  2068. - If you set User and Group config vars, it'll setu/gid to them.
  2069. Changes in version 0.0.2pre13 - 2003-10-19
  2070. o General stability:
  2071. - SSL_write no longer fails when it returns WANTWRITE and the number
  2072. of bytes in the buf has changed by the next SSL_write call.
  2073. - Fix segfault fetching directory when network is down
  2074. - Fix a variety of minor memory leaks
  2075. - Dirservers reload the fingerprints file on HUP, so I don't have
  2076. to take down the network when I approve a new router
  2077. - Default server config file has explicit Address line to specify fqdn
  2078. o Buffers:
  2079. - Buffers grow and shrink as needed (Cut process size from 20M to 2M)
  2080. - Make listener connections not ever alloc bufs
  2081. o Autoconf improvements:
  2082. - don't clobber an external CFLAGS in ./configure
  2083. - Make install now works
  2084. - create var/lib/tor on make install
  2085. - autocreate a tor.sh initscript to help distribs
  2086. - autocreate the torrc and sample-server-torrc with correct paths
  2087. o Log files and Daemonizing now work:
  2088. - If --DebugLogFile is specified, log to it at -l debug
  2089. - If --LogFile is specified, use it instead of commandline
  2090. - If --RunAsDaemon is set, tor forks and backgrounds on startup