Commit Graph

155 Commits

Author SHA1 Message Date
Alex Xu (Hello71)
f1e8e54964 Simplify channel_rsa_id_group_set_badness, #24119 2017-11-30 08:00:24 -05:00
Alex Xu (Hello71)
2cda005ac4 Add fast paths to channel_rsa_id_group_set_badness, #24119 2017-11-24 12:42:51 -05:00
Nick Mathewson
91467e04b1 Merge branch 'bug22805_v2_squashed' 2017-09-22 08:58:17 -04:00
Nick Mathewson
ceb49c1c5f Use channel_is_client() accessor in channelpadding.c.
Also, allow channel_is_client() to take a const channel.
2017-09-22 08:55:53 -04:00
Nick Mathewson
d1e0e486e9 Stop clearing the is_client flag on channel directly 2017-09-22 08:55:53 -04:00
Nick Mathewson
c1deabd3b0 Run our #else/#endif annotator on our source code. 2017-09-15 16:24:44 -04:00
Nick Mathewson
639766dbc3 Merge branch 'maint-0.3.1'
Resolve conflict with 23532 code.
2017-09-15 14:40:35 -04:00
Nick Mathewson
0f4f40b70f Merge remote-tracking branch 'dgoulet/ticket12541_032_02' 2017-09-15 12:00:50 -04:00
Matt Traudt
dde358667d sched: Implement the KIST scheduler
Closes #12541

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
Matt Traudt
2034e0d1d4 sched: Groundwork before KIST implementation
- HT_FOREACH_FN defined in an additional place because nickm did that
  in an old kist prototype
- Make channel_more_to_flush mockable for future sched tests
- Add empty scheduler_{vanilla,kist}.c files and put in include.am

Signed-off-by: David Goulet <dgoulet@torproject.org>
2017-09-15 11:40:59 -04:00
Nick Mathewson
e05414d241 Fix several places where md-using relays would get wrong behavior.
This patch replaces a few calls to router_get_by_id_digest ("do we
have a routerinfo?") with connection_or_digest_is_known_relay ("do
we know this relay to be in the consensus, or have been there some
time recently?").

Found while doing the 21585 audit; fixes bug 23533.  Bugfix on
0.3.0.1-alpha.
2017-09-15 09:35:59 -04:00
Nick Mathewson
8eef7fc845 Merge branch 'maint-0.3.1' 2017-09-12 10:30:54 -04:00
Mike Perry
6d221c8f37 Ticket #17857: Apply padding off-switch to existing connections. 2017-09-12 10:28:45 -04:00
Mike Perry
79e2e4d3cb Ticket #17857: Padding off-switch for single hop connections
This doesn't apply to currently active connections.. yet...
2017-06-23 16:53:39 -04:00
Nick Mathewson
3a8a92fddd Merge branch 'callgraph_reduction_v2' 2017-06-21 16:47:55 -04:00
Nick Mathewson
1c0a2335cd Extract channel_do_open_actions() from non-open _change_state cases
This reduces the size of the largest SCC in the callgraph by 30
functions, from 58 to 28.
2017-06-21 14:03:00 -04:00
Nick Mathewson
ef2248d09b Fix a warning about an extraneous semicolon 2017-05-09 07:25:34 -04:00
Nick Mathewson
4d6c79d1de Fix some clang-i386 warnings in master. 2017-05-08 15:34:37 -04:00
Nick Mathewson
fb97f76e71 whitespace fixes 2017-05-08 13:57:08 -04:00
Nick Mathewson
4d30dde156 Merge branch 'netflow_padding-v6-rebased2-squashed' 2017-05-08 13:54:59 -04:00
Mike Perry
76c9330f9d Bug 17604: Converge on only one long-lived TLS conn between relays.
Accomplished via the following:

1. Use NETINFO cells to determine if both peers will agree on canonical
   status. Prefer connections where they agree to those where they do not.
2. Alter channel_is_better() to prefer older orconns in the case of multiple
   canonical connections, and use the orconn with more circuits on it in case
   of age ties.

Also perform some hourly accounting on how many of these types of connections
there are and log it at info or notice level.
2017-05-08 13:49:22 -04:00
Mike Perry
b0e92634d8 Netflow record collapsing defense.
This defense will cause Cisco, Juniper, Fortinet, and other routers operating
in the default configuration to collapse netflow records that would normally
be split due to the 15 second flow idle timeout.

Collapsing these records should greatly reduce the utility of default netflow
data for correlation attacks, since all client-side records should become 30
minute chunks of total bytes sent/received, rather than creating multiple
separate records for every webpage load/ssh command interaction/XMPP chat/whatever
else happens to be inactive for more than 15 seconds.

The defense adds consensus parameters to govern the range of timeout values
for sending padding packets, as well as for keeping connections open.

The defense only sends padding when connections are otherwise inactive, and it
does not pad connections used solely for directory traffic at all. By default
it also doesn't pad inter-relay connections.

Statistics on the total padding in the last 24 hours are exported to the
extra-info descriptors.
2017-05-08 13:49:21 -04:00
Nick Mathewson
7505f452c8 Run the copyright update script. 2017-03-15 16:13:17 -04:00
Nick Mathewson
515e1f663a Add an O(1) map from channel->global_identifier to channel 2017-02-21 20:58:25 -05:00
Nick Mathewson
472b277207 Remove the (no longer compiled) code for legacy guard selection.
Part of 20830.
2017-01-18 15:27:10 -05:00
Nick Mathewson
97ed2ce085 Unindent long-misindented blocks.
We switched these to be "if (1) " a while back, so we could keep
the indentation and avoid merge conflicts.  But it's nice to clean
up from time to time.
2017-01-02 12:16:57 -05:00
Nick Mathewson
26651d7fdb Fix some dubious indentation 2017-01-02 12:13:11 -05:00
Nick Mathewson
2cee38f76a Merge branch 'prop271_030_v1_squashed' 2016-12-16 11:20:59 -05:00
Nick Mathewson
6867950432 Wrap all of the legacy guard code, and its users, in #ifdefs
This will make it easier to see what we remove down the line.
2016-12-16 11:06:22 -05:00
Nick Mathewson
3b1e04fe45 Teach channel_rsa_id_group_set_badness_() about Ed25519
(Only run the connection_or_group_set_badness_() function on groups
of channels that have the same RSA and Ed25519 identities.)

There's a possible opportunity here where we might want to set a
channel to "bad" if it has no ed25519 identity and some other
channel has some.  Also there's an opportunity to add a warning if
we ever have an Ed mismatch on open connections with the same RSA
ID.
2016-12-08 16:48:00 -05:00
Nick Mathewson
68acf8f12e Tell channel_set_identity_digest() that ed keys can be NULL 2016-12-08 16:47:59 -05:00
Nick Mathewson
6788418f28 Propagate Ed25519 identities downwards into more functions.
Actually set ed25519 identities on channels when we set a channel's
identity.
2016-12-08 16:47:58 -05:00
Nick Mathewson
a20c8a81d7 Migrate main data loop for set_bad_connections to use channel structures
This was the last user of our or_connections-by-ID map.  It also had
a tendency to be O(N) in cases that only had to be O(1).
2016-12-08 16:47:57 -05:00
Nick Mathewson
ef5158b2d2 When attempting to find a channel by ID, consider Ed ID.
Right now, there's only a mechanism to look for a channel where the
RSA ID matches *and* the ED ID matches. We can add a separate map
later if we want.
2016-12-08 16:47:56 -05:00
Nick Mathewson
dbbaa51518 Use the new guard notification/selection APIs throughout Tor
This patch doesn't cover every case; omitted cases are marked with
"XXXX prop271", as usual.  It leaves both the old interface and the
new interface for guard status notification, since they don't
actually work in the same way: the new API wants to be told when a
circuit has failed or succeeded, whereas the old API wants to know
when a channel has failed or succeeded.

I ran into some trouble with directory guard stuff, since when we
pick the directory guard, we don't actually have a circuit to
associate it with.  I solved that by allowing guard states to be
associated with directory connections, not just circuits.
2016-11-30 14:42:53 -05:00
Nick Mathewson
0533d14213 Replace some assert(1)s with nonfatal_unreached_once().
These were probably supposed to be assert(0).
2016-11-03 16:06:53 -04:00
Nick Mathewson
d9ca4e20bd Merge branch 'feature_15055_v2' 2016-11-03 08:44:46 -04:00
Nick Mathewson
99b3e54691 Add "Ed ID" arguments to a bunch of connection-ID-related fns.
In particular, these functions are the ones that set the identity of
a given connection or channel, and/or confirm that we have learned
said IDs.

There's a lot of stub code here: we don't actually need to use the
new keys till we start looking up connections/channels by Ed25519
IDs.  Still, we want to start passing the Ed25519 IDs in now, so it
makes sense to add these stubs as part of 15055.
2016-11-03 08:37:22 -04:00
Nick Mathewson
ec4142abdf Unify code in channel_write_*cell()
Patch from pingl; patch for 13827.
2016-10-19 17:07:23 -04:00
Nick Mathewson
35df48b189 Module docs for channel.c and channeltls.c 2016-10-18 10:53:12 -04:00
Nick Mathewson
5927ed8d33 checkSpace.pl now forbids more identifiers.
The functions it warns about are:
  assert, memcmp, strcat, strcpy, sprintf, malloc, free, realloc,
  strdup, strndup, calloc.

Also, fix a few lingering instances of these in the code. Use other
conventions to indicate _intended_ use of assert and
malloc/realloc/etc.
2016-09-06 12:35:37 -04:00
Nick Mathewson
53a3b39da1 Add -Wmissing-variable-declarations, with attendant fixes
This is a big-ish patch, but it's very straightforward.  Under this
clang warning, we're not actually allowed to have a global variable
without a previous extern declaration for it.  The cases where we
violated this rule fall into three roughly equal groups:
  * Stuff that should have been static.
  * Stuff that was global but where the extern was local to some
    other C file.
  * Stuff that was only global when built for the unit tests, that
    needed a conditional extern in the headers.

The first two were IMO genuine problems; the last is a wart of how
we build tests.
2016-06-11 10:11:54 -04:00
Nick Mathewson
80f1a2cbbd Add the -Wextra-semi warning from clang, and fix the cases where it triggers 2016-06-11 10:11:54 -04:00
Nick Mathewson
8f2d2933f9 Use -Wdouble-promotion in GCC >= 4.6
This warning triggers on silently promoting a float to a double.  In
our code, it's just a sign that somebody used a float by mistake,
since we always prefer double.
2016-06-11 10:11:52 -04:00
Nick Mathewson
493499a339 Add -Wfloat-conversion for GCC >= 4.9
This caught quite a few minor issues in our unit tests and elsewhere
in our code.
2016-06-11 10:11:52 -04:00
Nick Mathewson
055a7a198a Rename tor_dup_addr to tor_addr_to_str_dup.
Patch from icanhasaccount; closes 18462.
2016-03-28 16:36:51 -04:00
Nick Mathewson
4895d8288c Do not treat "DOCDOC" as doxygen. 2016-03-26 10:11:45 -04:00
Nick Mathewson
cb3f9bc2d4 Merge branch 'bug18570_027' 2016-03-21 10:20:16 -04:00
Andrea Shepard
bd87d37a86 Make sure channel_t queues its own copy of incoming cells 2016-03-21 10:14:47 -04:00
Nick Mathewson
57699de005 Update the copyright year. 2016-02-27 18:48:19 +01:00