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| author | Mike Perry <mikeperry-git@torproject.org> | 2016-09-06 11:35:53 -0700 |
|---|---|---|
| committer | Nick Mathewson <nickm@torproject.org> | 2017-05-08 13:49:21 -0400 |
| commit | b0e92634d85a3bf7612a6ce0339b96e4aad1e0bb (patch) | |
| tree | 43a2d03fb5c35e203b5d284882c05c1d273dd887 /src/or/networkstatus.c | |
| parent | 515e1f663ad4a5f1023ef2d2bbcb2de0152d0a47 (diff) | |
| download | tor-b0e92634d85a3bf7612a6ce0339b96e4aad1e0bb.tar.gz tor-b0e92634d85a3bf7612a6ce0339b96e4aad1e0bb.zip | |
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.
Diffstat (limited to 'src/or/networkstatus.c')
| -rw-r--r-- | src/or/networkstatus.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/or/networkstatus.c b/src/or/networkstatus.c index 508cf6c5b6..76b968a8c8 100644 --- a/src/or/networkstatus.c +++ b/src/or/networkstatus.c @@ -72,11 +72,11 @@ static strmap_t *unnamed_server_map = NULL; /** Most recently received and validated v3 "ns"-flavored consensus network * status. */ -static networkstatus_t *current_ns_consensus = NULL; +STATIC networkstatus_t *current_ns_consensus = NULL; /** Most recently received and validated v3 "microdec"-flavored consensus * network status. */ -static networkstatus_t *current_md_consensus = NULL; +STATIC networkstatus_t *current_md_consensus = NULL; /** A v3 consensus networkstatus that we've received, but which we don't * have enough certificates to be happy about. */ |