Commit Graph

21336 Commits

Author SHA1 Message Date
teor (Tim Wilson-Brown)
4db5a35e66 Consistently format addresses in node_get_address_string
Also, don't write to a buffer with length zero.
2016-01-29 07:16:05 +11:00
teor (Tim Wilson-Brown)
772577b547 Optimise reachability checks when iterating through relay lists
Skip address checks on servers.

Skip allowed-only address checks on non-bridge clients with IPv4.
2016-01-29 07:16:04 +11:00
teor (Tim Wilson-Brown)
e991d642ec Add firewall_is_fascist_dir()
Refactor common parts of firewall_is_fascist_or().
2016-01-29 07:16:04 +11:00
teor (Tim Wilson-Brown)
3b8216f215 Use fascist firewall and ClientUseIPv4 for bridge clients
Bridge clients ignore ClientUseIPv6, acting as if it is always 1.
This preserves existing behaviour.

Make ClientPreferIPv6OR/DirPort auto by default:
 * Bridge clients prefer IPv6 by default.
 * Other clients prefer IPv4 by default.
This preserves existing behaviour.
2016-01-29 07:16:04 +11:00
teor (Tim Wilson-Brown)
4528f89316 Make entry_guard_set_status consistent with entry_is_live
Check fascist_firewall_allows_node in entry_guard_set_status and
return the same message as entry_is_live.
2016-01-29 07:15:53 +11:00
teor (Tim Wilson-Brown)
1648666203 Choose bridge addresses by IPv4/IPv6 preferences 2016-01-29 07:15:53 +11:00
teor (Tim Wilson-Brown)
c3cc8e16e9 Log when IPv4/IPv6 restrictions or preferences weren't met 2016-01-29 07:13:57 +11:00
teor (Tim Wilson-Brown)
e72cbf7a4e Choose directory servers by IPv4/IPv6 preferences
Add unit tests, refactor pick_directory functions.
2016-01-29 07:13:57 +11:00
teor (Tim Wilson-Brown)
268608c0a0 Choose OR Entry Guards using IPv4/IPv6 preferences
Update unit tests.
2016-01-29 07:13:57 +11:00
teor (Tim Wilson-Brown)
2d33d192fc Add ClientUseIPv4 and ClientPreferIPv6DirPort torrc options
ClientUseIPv4 0 tells tor to avoid IPv4 client connections.
ClientPreferIPv6DirPort 1 tells tor to prefer IPv6 directory connections.

Refactor policy for IPv4/IPv6 preferences.

Fix a bug where node->ipv6_preferred could become stale if
ClientPreferIPv6ORPort was changed after the consensus was loaded.

Update documentation, existing code, add unit tests.
2016-01-29 07:13:57 +11:00
teor (Tim Wilson-Brown)
4460feaf28 Fix *_get_all_orports to use ipv6_orport
node_get_all_orports and router_get_all_orports incorrectly used or_port
with IPv6 addresses. They now use ipv6_orport.

Also refactor and remove duplicated code.
2016-01-29 07:13:56 +11:00
Nick Mathewson
b9714e1366 Merge remote-tracking branch 'teor/fix-multi-dir' 2015-12-16 20:04:49 -05:00
teor (Tim Wilson-Brown)
1b70497948 Prop210: Fix directory fetch tests
Check that directory fetches behave as expected under Prop 210.
2015-12-17 11:40:49 +11:00
teor (Tim Wilson-Brown)
e7e61ec7ec Prop210: Check fallback directories and authorities work as expected
Also clarify comments.
2015-12-17 11:39:40 +11:00
teor (Tim Wilson-Brown)
9882a88b74 Prop210: Only clients benefit from multiple consensus downloads
Anything that's a server can afford to wait for a few minutes.
(Except for bridge relays, which act like clients.)
2015-12-17 11:38:24 +11:00
Nick Mathewson
e6be486aea More emergency-check code for un-removed pending entry conns
This might also be what #17752 needs.
2015-12-16 19:16:07 -05:00
Nick Mathewson
24fcb6adbb Add an edge_about_to_close() call to ap_about_to_close().
Fixes #17876
2015-12-16 18:52:34 -05:00
Nick Mathewson
613e0e1c1a Move pending-connection code into connection_ap_about_to_close
It is AP-specific, so that's where it belongs.  This shouldn't have
caused a bug, but due to #17876, we were never actually calling
connection_edge_about_to_close from connection_ap_about_to_close,
causing bug #17874 (aka bug #17752).
2015-12-16 18:49:23 -05:00
Nick Mathewson
3317cd3a1f Merge branch 'maint-0.2.7' 2015-12-16 09:24:40 -05:00
Nick Mathewson
33b5bfb948 Don't call pthread_condattr_setclock() unless it exists
Fixes bug 17819; bugfix on 0.2.6.3-alpha (specifically, d684dbb0).
2015-12-16 09:23:44 -05:00
Nick Mathewson
a5da27cb35 Merge branch 'maint-0.2.7' 2015-12-16 09:07:11 -05:00
Nick Mathewson
784e9fff9b ... and fix another backtrace_symbols_fd call in sandbox.c 2015-12-16 09:05:49 -05:00
Nick Mathewson
e0aa4f837c ... and fix the linux backtrace_symbols{,_fd} calls 2015-12-16 09:05:18 -05:00
Nick Mathewson
9d17d10b36 tweak router_parse_addr_policy_item_from_string docs 2015-12-16 08:49:32 -05:00
Nick Mathewson
bb23ad3e47 Merge remote-tracking branch 'teor/feature17863' 2015-12-16 08:48:28 -05:00
Nick Mathewson
10e442ba93 Merge remote-tracking branch 'teor/feature17864' 2015-12-16 08:41:20 -05:00
Nick Mathewson
a03469aa85 More debugging code to try to track down #17659 2015-12-16 08:37:40 -05:00
Nick Mathewson
a4ca2ef1ff Add some assertions to try to catch #17752 2015-12-16 08:24:54 -05:00
Nick Mathewson
c4df0c9f52 ... and fix the linux backtrace_symbols{,_fd} calls 2015-12-16 08:20:53 -05:00
teor (Tim Wilson-Brown)
978210d5a8 Wait for busy authorities/fallbacks rather than ignoring excluded nodes
Applies the 6c443e987d fix to router_pick_directory_server_impl.

6c443e987d applied to directory servers chosen from the consensus,
and was:
"Tweak the 9969 fix a little

If we have busy nodes and excluded nodes, then don't retry with the
excluded ones enabled. Instead, wait for the busy ones to be nonbusy."
2015-12-16 09:07:11 +11:00
teor (Tim Wilson-Brown)
e2e09a2dbe Warn when comparing against an AF_UNSPEC address in a policy
It produces unexpected results, and it's most likely a bug.
2015-12-16 08:51:59 +11:00
teor (Tim Wilson-Brown)
ce92335214 Add policy assume_action support for IPv6 addresses
These IPv6 addresses must be quoted, because : is the port separator,
and "acce" is a valid hex block.

Add unit tests for assumed actions in IPv6 policies.
2015-12-16 08:51:35 +11:00
teor (Tim Wilson-Brown)
cd0a5db5e9 Initialise malformed_list to 0 each time we parse a policy 2015-12-16 08:51:34 +11:00
teor (Tim Wilson-Brown)
e54e71fb6b Limit IPv6 mask bits to 128 2015-12-16 08:51:34 +11:00
Nick Mathewson
6ba8afe5f8 Merge remote-tracking branch 'teor/feature15775-fallback-v9-squashed' 2015-12-15 14:04:00 -05:00
Nick Mathewson
a56fb58d6e Fix some memory leaks in the unit tests 2015-12-15 14:00:08 -05:00
teor
4c1c2a313d Add Fallback Directory Candidate Selection Script
"Tor has included a feature to fetch the initial consensus from nodes
 other than the authorities for a while now. We just haven't shipped a
 list of alternate locations for clients to go to yet.

 Reasons why we might want to ship tor with a list of additional places
 where clients can find the consensus is that it makes authority
 reachability and BW less important.

 We want them to have been around and using their current key, address,
 and port for a while now (120 days), and have been running, a guard,
 and a v2 directory mirror for most of that time."

Features:
* whitelist and blacklist for an opt-in/opt-out trial.
* excludes BadExits, tor versions that aren't recommended, and low
  consensus weight directory mirrors.
* reduces the weighting of Exits to avoid overloading them.
* places limits on the weight of any one fallback.
* includes an IPv6 address and orport for each FallbackDir, as
  implemented in #17327. (Tor won't bootstrap using IPv6 fallbacks
  until #17840 is merged.)
* generated output includes timestamps & Onionoo URL for traceability.
* unit test ensures that we successfully load all included default
  fallback directories.

Closes ticket #15775. Patch by "teor".
OnionOO script by "weasel", "teor", "gsathya", and "karsten".
2015-12-16 05:54:40 +11:00
Nick Mathewson
efc8b2dbbf clean whitespace 2015-12-15 13:22:41 -05:00
Nick Mathewson
aa4be914f0 Merge remote-tracking branch 'teor/feature17327-v4' 2015-12-15 13:19:18 -05:00
Nick Mathewson
125e0c7022 remove redundant section in tor.1.txt 2015-12-15 13:18:06 -05:00
Nick Mathewson
aba39ea390 Merge branch 'feature8195_small_squashed' 2015-12-15 13:11:06 -05:00
Nick Mathewson
405a8d3fb4 Update KeepCapabilities based on comments from asn
* The option is now KeepBindCapabilities
* We now warn if the user specifically asked for KeepBindCapabilities
  and we can't deliver.
* The unit tests are willing to start.
* Fewer unused-variable warnings.
* More documentation, fewer misspellings.
2015-12-15 13:10:57 -05:00
Nick Mathewson
fd0c6671d1 Add unit tests for switch_id(), including tests for capabilities 2015-12-15 13:10:57 -05:00
Nick Mathewson
e8cc839e41 Add ability to keep the CAP_NET_BIND_SERVICE capability on Linux
This feature allows us to bind low ports when starting as root and
switching UIDs.

Based on code by David Goulet.

Implement feature 8195
2015-12-15 13:10:57 -05:00
Nick Mathewson
744958e0dd Fix a few compilation warnings and errors 2015-12-15 13:03:21 -05:00
Nick Mathewson
a7d44731d9 Merge remote-tracking branch 'teor/feature4483-v10-squashed' 2015-12-15 12:57:57 -05:00
teor (Tim Wilson-Brown)
d72af1085a Prop210: Add router_digest_is_fallback_dir
router_digest_is_fallback_dir returns 1 if the digest is in the
currently loaded list of fallback directories, and 0 otherwise.

This function is for future use.
2015-12-16 04:37:59 +11:00
teor (Tim Wilson-Brown)
2212530bf5 Prop210: Close excess connections once a consensus is downloading
Once tor is downloading a usable consensus, any other connection
attempts are not needed.

Choose a connection to keep, favouring:
* fallback directories over authorities,
* connections initiated earlier over later connections

Close all other connections downloading a consensus.
2015-12-16 04:37:59 +11:00
teor (Tim Wilson-Brown)
35bbf2e4a4 Prop210: Add schedules for simultaneous client consensus downloads
Prop210: Add attempt-based connection schedules

Existing tor schedules increment the schedule position on failure,
then retry the connection after the scheduled time.

To make multiple simultaneous connections, we need to increment the
schedule position when making each attempt, then retry a (potentially
simultaneous) connection after the scheduled time.

(Also change find_dl_schedule_and_len to find_dl_schedule, as it no
longer takes or returns len.)

Prop210: Add multiple simultaneous consensus downloads for clients

Make connections on TestingClientBootstrapConsensus*DownloadSchedule,
incrementing the schedule each time the client attempts to connect.

Check if the number of downloads is less than
TestingClientBootstrapConsensusMaxInProgressTries before trying any
more connections.
2015-12-16 04:37:49 +11:00
Nick Mathewson
54433993c7 Merge branch 'feature17576-UseDefaultFallbackDirs-v2-squashed' 2015-12-15 12:19:08 -05:00