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  1. $Id$
  2. Legend:
  3. SPEC!! - Not specified
  4. SPEC - Spec not finalized
  5. N - nick claims
  6. R - arma claims
  7. P - phobos claims
  8. - Not done
  9. * Top priority
  10. . Partially done
  11. o Done
  12. d Deferrable
  13. D Deferred
  14. X Abandoned
  15. Documentation and testing on 0.1.2.x-final series
  16. N - Test guard unreachable logic; make sure that we actually attempt to
  17. connect to guards that we think are unreachable from time to time.
  18. Make sure that we don't freak out when the network is down.
  19. . Forward compatibility fixes
  20. N - Hack up a client that gives out weird/no certificates, so we can
  21. test to make sure that this doesn't cause servers to crash.
  22. NR. Write path-spec.txt
  23. - Docs
  24. - Tell people about OSX Uninstaller
  25. - Quietly document NT Service options
  26. - More prominently, we should have a recommended apps list.
  27. - recommend gaim.
  28. - unrecommend IE because of ftp:// bug.
  29. N - we should add a preamble to tor-design saying it's out of date.
  30. N . Document transport and natdport
  31. o In man page
  32. - In a good HOWTO.
  33. Things we'd like to do in 0.2.0.x:
  34. - Bug reports I've heard along that way that don't have enough
  35. details to solve them yet.
  36. - tup said that when he set FetchUselessDescriptors, after
  37. 24 or 48 hours he wasn't fetching any descriptors at all
  38. anymore. This was in 0.2.0 but worked fine in 0.1.2.
  39. - arma noticed that when his network went away and he tried
  40. a new guard node and the connect() syscall failed to it,
  41. the guard wasn't being marked as down. 0.2.0.x.
  42. - after being without network for 12 hours, arma's tor decided
  43. it couldn't fetch any network statuses, and never tried again
  44. even when the network came back and arma clicked on things.
  45. also 0.2.0.
  46. - Update dir-spec with decisions made on these issues:
  47. o clients don't log as loudly when they receive them
  48. o they don't count toward the 3-strikes rule
  49. D But eventually, we give up after getting a lot of 503s.
  50. D Delay when we get a lot of 503s, rather than punting onto the
  51. servers that have given us 503s?
  52. o Add a 'BadDirectory' flag to statuses.
  53. o authorities should *never* 503 a cache, and should never 503
  54. network status requests.
  55. D They can 503 client descriptor requests when they feel like it.
  56. How can they distinguish? Not implemented for now, maybe
  57. should abandon.
  58. - describe our 302 not modified behaviors.
  59. - and document a bit more -- e.g. it looks like we return an empty
  60. 200 OK when somebody asks us for a networkstatus and we don't
  61. have it?
  62. - Proposals:
  63. . 101: Voting on the Tor Directory System (plus 103)
  64. o Prepare ASAP for new voting formats
  65. o Don't flip out with warnings when voting-related URLs are
  66. uploaded/downloaded.
  67. . Finalize proposal
  68. . Merge 101 and 103 and dir-spec.txt into a new dir-spec.txt; fork
  69. the existing one into dir-spec-v2.txt.
  70. - Get authorities voting
  71. . Implement parsing for new document formats
  72. o Parse key certificates
  73. o Parse votes and consensuses
  74. - Unit tests for above
  75. . Code to manage key certificates
  76. o Generate certificates
  77. o Authorities load certificates
  78. o Clients cache certificates on disk
  79. - Download as needed.
  80. - Serve list as needed.
  81. o Avoid double-checking signatures every time we get a vote.
  82. - Warn about expired stuff.
  83. o Code to generate votes
  84. o Code to generate consensus from a list of votes
  85. - Add a signature to a consensus.
  86. o Code to check signatures on a consensus
  87. - Push/pull documents as appropriate.
  88. o Have clients know which authorities are v3 authorities, and what
  89. their keys are.
  90. - While we're at it, let v3 authorities have fqdns lines.
  91. - Start caching consensus documents once authorities make them
  92. - Start downloading and using consensus documents once caches serve them
  93. . 104: Long and Short Router Descriptors
  94. . Finalize proposal
  95. o Implement parsing for extra-info documents
  96. o Have routers generate extra-info documents.
  97. o Have have authorities accept them and serve them from specified URLs
  98. o Implement directory-protocol side.
  99. o Implement storage in memory
  100. o Implement cache on disk.
  101. o Have routers upload extra-info documents to authorities running
  102. version 0.2.0.0-alpha-dev (r10070) or later.
  103. o Implement, but make it option-controlled.
  104. o Make it always-on once it seems to work.
  105. o Implement option to download and cache extra-info documents.
  106. o Improve the 'retry' logic on extra-info documents.
  107. - Drop bandwidth history from router-descriptors
  108. - 105: Version negotiation for the Tor protocol
  109. - 108: Base "Stable" Flag on Mean Time Between Failures
  110. - 109: No more than one server per IP address
  111. o 103: Splitting identity key from regularly used signing key
  112. o Merge with 101 into a new dir-spec.txt
  113. - 113: Simplifying directory authority administration
  114. - 110: prevent infinite-length circuits (phase one)
  115. - servers should recognize relay_extend cells and pass them
  116. on just like relay cells
  117. - Refactoring:
  118. - Make resolves no longer use edge_connection_t unless they are actually
  119. _on_ on a socks connection: have edge_connection_t and (say)
  120. dns_request_t both extend an edge_stream_t, and have p_streams and
  121. n_streams both be linked lists of edge_stream_t.
  122. . Make cells get buffered on circuit, not on the or_conn.
  123. O Implement cell queues
  124. o Keep doubly-linked list of active circuits on each or_conn.
  125. o Put all relay data on the circuit cell queue, not on the outbuf.
  126. o Don't move them into the target conn until there is space on the
  127. target conn's outbuf.
  128. o When making a circuit active on a connection with an empty buf,
  129. we need to "prime" the buffer, so that we can trigger the "I flushed
  130. some" test.
  131. X Change how directory-bridge-choking works: choke when circuit queue
  132. is full, not when the orconn is "too full".
  133. [No need to do this: the edge-connection choking will already take
  134. care of this a bit, and rewriting the 'bridged connection' code
  135. to not use socketpairs will give us even more control.]
  136. . Do we switch to pool-allocation for cells?
  137. o Implement pool-allocation
  138. o Have Tor use it for packed cells.
  139. o Document it.
  140. o Do something smart with freeing unused chunks.
  141. - Benchmark pool-allocation vs straightforward malloc.
  142. - Adjust memory allocation logic in pools to favor a little less
  143. slack memory.
  144. D Can we stop doing so many memcpys on cells?
  145. o Also, only package data from exitconns when there is space on the
  146. target OR conn's outbuf? or when the circuit is not too full.
  147. - MAYBE kill stalled circuits rather than stalled connections; consider
  148. anonymity implications.
  149. - Move all status info out of routerinfo into local_routerstatus. Make
  150. "who can change what" in local_routerstatus explicit. Make
  151. local_routerstatus (or equivalent) subsume all places to go for "what
  152. router is this?"
  153. . Remove socketpair-based bridges conns, and the word "bridge". (Use
  154. shared (or connected) buffers for communication, rather than sockets.)
  155. o Design
  156. o Pick a term. The term is now "linked connection."
  157. o Figure out how to ensure that handle_read is always called.
  158. (Use event_active; keep active events in a list; use event_once
  159. to make sure that we call the event base dispatch function enough.)
  160. . Implement
  161. o Count connections and sockets separately
  162. . Allow connections with s == -1
  163. o Add a linked_conn field; it should get marked when we're marked.
  164. o Add a function to move bytes from buffer to buffer.
  165. o Have read_to_buf dtrt for linked connections
  166. o Have handle_read dtrt for linked connections
  167. o Have an activate/deactivate_linked_connection function.
  168. o Have activated connections added to a list on first activation, and
  169. that list made active before calls to event_loop.
  170. o Have connections get deactivated when no more data to write on
  171. linked conn outbuf.
  172. o Handle closing connections properly.
  173. o Actually create and use linked connections.
  174. - Handle rate-limiting on directory writes to linked directory
  175. connections in a more sensible manner.
  176. o Rename want_to_read and want_to_write; they're actually about
  177. being blocked, not about wanting to read/write.
  178. - Find more ways to test this.
  179. D Generate torrc.{complete|sample}.in, tor.1.in, the HTML manual, and the
  180. online config documentation from a single source.
  181. - Have clients do TLS connection rotation less often than "every 10
  182. minutes" in the thrashy case, and more often than "once a week" in the
  183. extra-stable case.
  184. - Streamline how we pick entry nodes: Make choose_random_entry() have
  185. less magic and less control logic.
  186. - Implement TLS shutdown properly when possible.
  187. - Maybe move NT services into their own module.
  188. . Autoconf cleanups and improvements:
  189. o Remove redundant event.h check.
  190. o Check for zlib with the same machinery as for libevent and openssl.
  191. o Make the "no longer strictly accurate" message accurate.
  192. . Tell the user what -dev package to install based on OS.
  193. - Detect correct version of libraries.
  194. o Run autoupdate
  195. - Refactor networkstatus generation:
  196. o Use networkstatus_getinfo_helper_single() as base of
  197. networkstatus generation; eliminate duplicate code.
  198. - Include "v" line in getinfo values.
  199. - Features:
  200. - Traffic priorities
  201. - Ability to prioritize own traffic over relayed traffic.
  202. o Implement a DNS proxy
  203. o Make a listener type.
  204. o Hook into connection_edge logic.
  205. o Hook into evdns_server_* logic
  206. o Actually send back a useful answer.
  207. o Make it handle .onion and .exit correctly.
  208. - Document.
  209. - Handle TCP DNS requests too?
  210. o Add a way to request DNS resolves from the controller.
  211. - A better UI for authority ops.
  212. - Follow weasel's proposal, crossed with mixminion dir config format
  213. - Write a proposal
  214. - Bridges users (rudimentary version)
  215. o Ability to specify bridges manually
  216. o Config option 'UseBridges' that bridge users can turn on.
  217. o uses bridges as first hop rather than entry guards.
  218. D Do we want to maintain our own set of entryguards that we use as
  219. next hop after the bridge? Open research question; let's say no
  220. for 0.2.0 unless we learn otherwise.
  221. o if you don't have any routerinfos for your bridges, or you don't
  222. like the ones you have, ask a new bridge for its server/authority.
  223. . Ask all directory questions to bridge via BEGIN_DIR.
  224. - use the bridges for dir fetches even when our dirport is open.
  225. R - drop 'authority' queries if they're to our own identity key; accept
  226. them otherwise.
  227. N - Design/implement the "local-status" or something like it, from the
  228. "Descriptor purposes: how to tell them apart" section of
  229. http://archives.seul.org/or/dev/May-2007/msg00008.html
  230. - cache of bridges that we've learned about and use but aren't
  231. manually listed in the torrc.
  232. D and some mechanism for specifying that we want to stop using
  233. a given bridge in this cache.
  234. - timeout and retry schedules for fetching bridge descriptors
  235. - give extend_info_t a router_purpose again
  236. o react faster to download networkstatuses after the first bridge
  237. descriptor arrives
  238. - be more robust to bridges being marked as down and leaving us
  239. stranded without any known "running" bridges.
  240. - Bridges operators (rudimentary version)
  241. - Ability to act as dir cache without a dir port.
  242. o Bridges publish to bridge authorities
  243. - Fix BEGIN_DIR so that you connect to bridge of which you only
  244. know IP (and optionally fingerprint), and then use BEGIN_DIR to learn
  245. more about it.
  246. - look at server_mode() and decide if it always applies to bridges too.
  247. - Bridges authorities (rudimentary version)
  248. o Rudimentary "do not publish networkstatus" option for bridge
  249. authorities.
  250. - Clients can ask bridge authorities for more bridges.
  251. D Should do reachability testing but only on the purpose==bridge
  252. descriptors we have.
  253. - Bridges
  254. - Clients can ask bridge authorities for updates on known bridges.
  255. - More TLS normalization work: make Tor less easily
  256. fingerprinted.
  257. - Directory system improvements
  258. - config option to publish what ports you listen on, beyond
  259. ORPort/DirPort. It should support ranges and bit prefixes (?) too.
  260. - Let controller set router flags for authority to transmit, and for
  261. client to use.
  262. - Support relaying streams to ipv6.
  263. - Internal code support for ipv6:
  264. o Clone ipv6 functions (inet_ntop, inet_pton) where they don't exist.
  265. - Most address variables need to become sockaddrs.
  266. - Teach resolving code how to handle ipv6.
  267. - Teach exit policies about ipv6 (consider ipv4/ipv6 interaction!)
  268. - ...
  269. - Let servers decide to support BEGIN_DIR but not DirPort.
  270. o Tor should bind its ports before dropping privs, so users don't
  271. have to do the ipchains dance.
  272. - Blocking-resistance.
  273. - It would be potentially helpful to https requests on the OR port by
  274. acting like an HTTPS server.
  275. - add an 'exit-address' line in the descriptor for servers that exit
  276. from something that isn't their published address.
  277. - Audit how much RAM we're using for buffers and cell pools; try to
  278. trim down a lot.
  279. - Accept \n as end of lines in the control protocol in addition to \r\n.
  280. - Base relative control socket paths in datadir.
  281. o Deprecations:
  282. o Remove v0 control protocol.
  283. - can we deprecate 'getinfo network-status'?
  284. - can we deprecate the FastFirstHopPK config option?
  285. P - Packaging:
  286. P - Can we switch to polipo?
  287. P - If we haven't replaced privoxy, lock down its configuration in all
  288. packages, as documented in tor-doc-unix.html
  289. P - Figure out why dll's compiled in mingw don't work right in WinXP.
  290. P - Figure out why openssl 0.9.8e "make test" fails at sha256t test.
  291. P - Figure out if including RSA and IDEA are bad for Tor from a legal
  292. perspective
  293. P - Create packages for Nokia 800, requested by Chris Soghoian
  294. P - Consider creating special Tor-Polipo-Vidalia test packages,
  295. requested by Dmitri Vitalev
  296. - add an AuthDirBadexit torrc option if we decide we want one.
  297. Deferred from 0.1.2.x:
  298. - BEGIN_DIR items
  299. - turn the received socks addr:port into a digest for setting .exit
  300. - handle connect-dir streams that don't have a chosen_exit_name set.
  301. - 'networkstatus arrived' event
  302. - More work on AvoidDiskWrites?
  303. - Get some kind of "meta signing key" to be used solely to sign
  304. releases/to certify releases when signed by the right people/
  305. to certify sign the right people's keys? Also use this to cert the SSL
  306. key, etc. (Proposal 103)
  307. - per-conn write buckets
  308. - separate config options for read vs write limiting
  309. (It's hard to support read > write, since we need better
  310. congestion control to avoid overfull buffers there. So,
  311. defer the whole thing.)
  312. - don't do dns hijacking tests if we're reject *:* exit policy?
  313. (deferred until 0.1.1.x is less common)
  314. - Directory guards
  315. - RAM use in directory authorities.
  316. - Memory use improvements:
  317. - Look into pulling serverdescs off buffers as they arrive.
  318. - Save and mmap v1 directories, and networkstatus docs; store them
  319. zipped, not uncompressed.
  320. - Switch cached_router_t to use mmap.
  321. - What to do about reference counts on windows? (On Unix, this is
  322. easy: unlink works fine. (Right?) On Windows, I have doubts. Do we
  323. need to keep multiple files?)
  324. - What do we do about the fact that people can't read zlib-
  325. compressed files manually?
  326. - If the client's clock is too far in the past, it will drop (or
  327. just not try to get) descriptors, so it'll never build circuits.
  328. - Tolerate clock skew on bridge relays.
  329. X Eventdns improvements
  330. X Have a way to query for AAAA and A records simultaneously.
  331. X Improve request API: At the very least, add the ability to construct
  332. a more-or-less arbitrary request and get a response.
  333. X (Can we suppress cnames? Should we?)
  334. - Now that we're avoiding exits when picking non-exit positions,
  335. we need to consider how to pick nodes for internal circuits. If
  336. we avoid exits for all positions, we skew the load balancing. If
  337. we accept exits for all positions, we leak whether it's an internal
  338. circuit at every step. If we accept exits only at the last hop, we
  339. reintroduce Lasse's attacks from the Oakland paper.
  340. - We should ship with a list of stable dir mirrors -- they're not
  341. trusted like the authorities, but they'll provide more robustness
  342. and diversity for bootstrapping clients.
  343. - A way to adjust router flags from the controller.
  344. (How do we prevent the authority from clobbering them soon after?)
  345. - Better estimates in the directory of whether servers have good uptime
  346. (high expected time to failure) or good guard qualities (high
  347. fractional uptime).
  348. - AKA Track uptime as %-of-time-up, as well as time-since-last-down
  349. - Have a "Faster" status flag that means it. Fast2, Fast4, Fast8?
  350. - spec
  351. - implement
  352. - Windows server usability
  353. - Solve the ENOBUFS problem.
  354. - make tor's use of openssl operate on buffers rather than sockets,
  355. so we can make use of libevent's buffer paradigm once it has one.
  356. - make tor's use of libevent tolerate either the socket or the
  357. buffer paradigm; includes unifying the functions in connect.c.
  358. - We need a getrlimit equivalent on Windows so we can reserve some
  359. file descriptors for saving files, etc. Otherwise we'll trigger
  360. asserts when we're out of file descriptors and crash.
  361. M - rewrite how libevent does select() on win32 so it's not so very slow.
  362. - Add overlapped IO
  363. - Add an option (related to AvoidDiskWrites) to disable directory caching.
  364. - Finish status event implementation and accompanying getinfos
  365. - Missing events:
  366. - DIR_REACHABLE
  367. - BAD_DIR_RESPONSE (Unexpected directory response; maybe we're behind
  368. a firewall.)
  369. - BAD_PROXY (Bad http or https proxy)
  370. - UNRECOGNIZED_ROUTER (a nickname we asked for is unavailable)
  371. - Status events related to hibernation
  372. - something about failing to parse our address?
  373. from resolve_my_address() in config.c
  374. - sketchy OS, sketchy threading
  375. - too many onions queued: threading problems or slow CPU?
  376. - Missing fields:
  377. - TIMEOUT on CHECKING_REACHABILITY
  378. - GETINFO status/client, status/server, status/general: There should be
  379. some way to learn which status events are currently "in effect."
  380. We should specify which these are, what format they appear in, and so
  381. on.
  382. Minor items for 0.1.2.x as time permits:
  383. - include bandwidth breakdown by conn->type in BW events.
  384. o Unify autoconf search code for libevent and openssl. Make code
  385. suggest platform-appropriate "devel" / "dev" / whatever packages
  386. if we can link but we can't find the headers.
  387. - Recommend polipo? Please?
  388. - Make documentation realize that location of system configuration file
  389. will depend on location of system defaults, and isn't always /etc/torrc.
  390. - Review torrc.sample to make it more discursive.
  391. - a way to generate the website diagrams from source, so we can
  392. translate them as utf-8 text rather than with gimp.
  393. R - add d64 and fp64 along-side d and fp so people can paste status
  394. entries into a url. since + is a valid base64 char, only allow one
  395. at a time. spec and then do.
  396. o When we export something from foo.c file for testing purposes only,
  397. make a foo_test.h file for test.c to include... or put them behind an
  398. #ifdef FOO_PRIVATE.
  399. - The Debian package now uses --verify-config when (re)starting,
  400. to distinguish configuration errors from other errors. Perhaps
  401. the RPM and other startup scripts should too?
  402. - add a "default.action" file to the tor/vidalia bundle so we can fix the
  403. https thing in the default configuration:
  404. http://wiki.noreply.org/noreply/TheOnionRouter/TorFAQ#PrivoxyWeirdSSLPort
  405. . Flesh out options_description array in src/or/config.c
  406. X If we try to publish as a nickname that's already claimed, should
  407. we append a number (or increment the number) and try again? This
  408. way people who read their logs can fix it as before, but people
  409. who don't read their logs will still offer Tor servers.
  410. - Fall back to unnamed; warn user; send controller event. ("When we
  411. notice a 'Rejected: There is already a named server with this nickname'
  412. message... or maybe instead when we see in the networkstatuses that
  413. somebody else is Named with the name we want: warn the user, send a
  414. STATUS_SERVER message, and fall back to unnamed.")
  415. - Rate limit exit connections to a given destination -- this helps
  416. us play nice with websites when Tor users want to crawl them; it
  417. also introduces DoS opportunities.
  418. - Christian Grothoff's attack of infinite-length circuit.
  419. the solution is to have a separate 'extend-data' cell type
  420. which is used for the first N data cells, and only
  421. extend-data cells can be extend requests.
  422. . Specify, including thought about anonymity implications. [proposal 110]
  423. - Display the reasons in 'destroy' and 'truncated' cells under some
  424. circumstances?
  425. - If the server is spewing complaints about raising your ulimit -n,
  426. we should add a note about this to the server descriptor so other
  427. people can notice too.
  428. - cpu fixes:
  429. - see if we should make use of truncate to retry
  430. . Directory changes
  431. . Some back-out mechanism for auto-approval
  432. - a way of rolling back approvals to before a timestamp
  433. - Consider minion-like fingerprint file/log combination.
  434. - packaging and ui stuff:
  435. . multiple sample torrc files
  436. . figure out how to make nt service stuff work?
  437. . Document it.
  438. - Vet all pending installer patches
  439. - Win32 installer plus privoxy, sockscap/freecap, etc.
  440. - Vet win32 systray helper code
  441. (2007-04-15 phobos, do we still need these installer patches?)
  442. - Improve controller
  443. - a NEWSTATUS event similar to NEWDESC.
  444. - change circuit status events to give more details, like purpose,
  445. whether they're internal, when they become dirty, when they become
  446. too dirty for further circuits, etc.
  447. - What do we want here, exactly?
  448. - Specify and implement it.
  449. - Change stream status events analogously.
  450. - What do we want here, exactly?
  451. - Specify and implement it.
  452. - Make other events "better".
  453. - Change stream status events analogously.
  454. - What do we want here, exactly?
  455. - Specify and implement it.
  456. - Make other events "better" analogously
  457. - What do we want here, exactly?
  458. - Specify and implement it.
  459. . Expose more information via getinfo:
  460. - import and export rendezvous descriptors
  461. - Review all static fields for additional candidates
  462. - Allow EXTENDCIRCUIT to unknown server.
  463. - We need some way to adjust server status, and to tell tor not to
  464. download directories/network-status, and a way to force a download.
  465. - Make everything work with hidden services
  466. Future version:
  467. - servers might check certs for known-good ssl websites, and if they
  468. come back self-signed, declare themselves to be non-exits. similar
  469. to how we test for broken/evil dns now.
  470. - we try to build 4 test circuits to break them over different
  471. servers. but sometimes our entry node is the same for multiple
  472. test circuits. this defeats the point.
  473. - when we hit a funny error from a dir request (eg 403 forbidden),
  474. but tor is working and happy otherwise, and we haven't seen many
  475. such errors recently, then don't warn about it.
  476. - More consistent error checking in router_parse_entry_from_string().
  477. I can say "banana" as my bandwidthcapacity, and it won't even squeak.
  478. o Include the output of svn info in the binary, so it's trivial to see what
  479. version a binary was built from.
  480. o Do the same for svk info.
  481. - Add a doxygen style checker to make check-spaces so nick doesn't drift
  482. too far from arma's undocumented styleguide. Also, document that
  483. styleguide in HACKING. (See r9634 for example.)
  484. - exactly one space at beginning and at end of comments, except i
  485. guess when there's line-length pressure.
  486. - if we refer to a function name, put a () after it.
  487. - only write <b>foo</b> when foo is an argument to this function.
  488. - doxygen comments must always end in some form of punctuation.
  489. - capitalize the first sentence in the doxygen comment, except
  490. when you shouldn't.
  491. - avoid spelling errors and incorrect comments. ;)
  492. - Should TrackHostExits expire TrackHostExitsExpire seconds after their
  493. *last* use, not their *first* use?
  494. X Configuration format really wants sections.
  495. . Good RBL substitute.
  496. - Play with the implementations; link them from somewhere; add a
  497. round-robin link from torel.torproject.org; describe how to
  498. use them in the FAQ.
  499. - Authorities should try using exits for http to connect to some URLS
  500. (specified in a configuration file, so as not to make the List Of Things
  501. Not To Censor completely obvious) and ask them for results. Exits that
  502. don't give good answers should have the BadExit flag set.
  503. - Our current approach to block attempts to use Tor as a single-hop proxy
  504. is pretty lame; we should get a better one.
  505. . Update the hidden service stuff for the new dir approach.
  506. - switch to an ascii format, maybe sexpr?
  507. - authdirservers publish blobs of them.
  508. - other authdirservers fetch these blobs.
  509. - hidserv people have the option of not uploading their blobs.
  510. - you can insert a blob via the controller.
  511. - and there's some amount of backwards compatibility.
  512. - teach clients, intro points, and hidservs about auth mechanisms.
  513. - come up with a few more auth mechanisms.
  514. - auth mechanisms to let hidden service midpoint and responder filter
  515. connection requests.
  516. - Bind to random port when making outgoing connections to Tor servers,
  517. to reduce remote sniping attacks.
  518. - Have new people be in limbo and need to demonstrate usefulness
  519. before we approve them.
  520. - Clients should estimate their skew as median of skew from servers
  521. over last N seconds.
  522. - Make router_is_general_exit() a bit smarter once we're sure what it's for.
  523. - Audit everything to make sure rend and intro points are just as likely to
  524. be us as not.
  525. - Do something to prevent spurious EXTEND cells from making middleman
  526. nodes connect all over. Rate-limit failed connections, perhaps?
  527. - Automatically determine what ports are reachable and start using
  528. those, if circuits aren't working and it's a pattern we recognize
  529. ("port 443 worked once and port 9001 keeps not working").
  530. - Limit to 2 dir, 2 OR, N SOCKS connections per IP.
  531. - Handle full buffers without totally borking
  532. - Rate-limit OR and directory connections overall and per-IP and
  533. maybe per subnet.
  534. - Hold-open-until-flushed now works by accident; it should work by
  535. design.
  536. - DoS protection: TLS puzzles, public key ops, bandwidth exhaustion.
  537. - Specify?
  538. o tor-resolve script should use socks5 to get better error messages.
  539. - hidserv offerers shouldn't need to define a SocksPort
  540. * figure out what breaks for this, and do it.
  541. - tor should be able to have a pool of outgoing IP addresses
  542. that it is able to rotate through. (maybe)
  543. - Specify; implement.
  544. - let each hidden service (or other thing) specify its own
  545. OutboundBindAddress?
  546. Blue-sky:
  547. - Patch privoxy and socks protocol to pass strings to the browser.
  548. - Standby/hotswap/redundant hidden services.
  549. - Robust decentralized storage for hidden service descriptors.
  550. - The "China problem"
  551. - Allow small cells and large cells on the same network?
  552. - Cell buffering and resending. This will allow us to handle broken
  553. circuits as long as the endpoints don't break, plus will allow
  554. connection (tls session key) rotation.
  555. - Implement Morphmix, so we can compare its behavior, complexity, etc.
  556. - Other transport. HTTP, udp, rdp, airhook, etc. May have to do our own
  557. link crypto, unless we can bully openssl into it.
  558. - Need a relay teardown cell, separate from one-way ends.
  559. (Pending a user who needs this)
  560. - Handle half-open connections: right now we don't support all TCP
  561. streams, at least according to the protocol. But we handle all that
  562. we've seen in the wild.
  563. (Pending a user who needs this)
  564. Non-Coding:
  565. - Mark up spec; note unclear points about servers
  566. - Mention controller libs someplace.
  567. . more pictures from ren. he wants to describe the tor handshake
  568. NR- write a spec appendix for 'being nice with tor'
  569. - tor-in-the-media page
  570. - Remove need for HACKING file.
  571. - Figure out licenses for website material.
  572. - Specify the keys and key rotation schedules and stuff
  573. P - document http://wiki.noreply.org/noreply/TheOnionRouter/TransparentProxy on freebsd and osx
  574. P - figure out why x86_64 won't build rpms from tor.spec
  575. P - figure out spec files for bundles of vidalia-tor-polipo
  576. P - figure out polipo install scripts for bundles of vidalia-tor-polipo on osx, win32
  577. P - evaluate https://sourceforge.net/projects/kleanup/
  578. P - evaluate TorK
  579. P - figure out selinux policy for tor
  580. P - change packaging system to more automated and specific for each
  581. platform, suggested by Paul Wouter
  582. Website:
  583. - and remove home and make the "Tor" picture be the link to home.
  584. - put the logo on the website, in source form, so people can put it on
  585. stickers directly, etc.
  586. - put the source image for the stickers on the website, so people can
  587. print their own
  588. R - make a page with the hidden service diagrams.
  589. - ask Jan to be the translation coordinator? add to volunteer page.
  590. - add a page for localizing all tor's components.
  591. - It would be neat if we had a single place that described _all_ the
  592. tor-related tools you can use, and what they give you, and how well they
  593. work. Right now, we don't give a lot of guidance wrt
  594. torbutton/foxproxy/privoxy/polipo in any consistent place.