mirror of
https://github.com/zeek/zeek.git
synced 2025-10-11 11:08:20 +00:00
5f3af9e9eb
This option indicates that the Teredo analyzer should wait until it sees both sides of a connection using a valid Teredo encapsulation before issuing a protocol_confirmation. Previous behavior confirmed on the first instance of a valid encapsulation, which could result in more false positives (and e.g. bogus entries in known-services.log). Addresses #890.
50 lines
1.7 KiB
Text
50 lines
1.7 KiB
Text
# @TEST-EXEC: bro -r $TRACES/tunnels/false-teredo.pcap %INPUT >output
|
|
# @TEST-EXEC: test ! -e weird.log
|
|
# @TEST-EXEC: test ! -e dpd.log
|
|
# @TEST-EXEC: bro -r $TRACES/tunnels/false-teredo.pcap %INPUT Tunnel::yielding_teredo_decapsulation=F >output
|
|
# @TEST-EXEC: btest-diff weird.log
|
|
# @TEST-EXEC: test ! -e dpd.log
|
|
|
|
# In the first case, there isn't any weird or protocol violation logged
|
|
# since the teredo analyzer recognizes that the DNS analyzer has confirmed
|
|
# the protocol and yields.
|
|
|
|
# In the second case, there are weirds since the teredo analyzer decapsulates
|
|
# despite the presence of the confirmed DNS analyzer and the resulting
|
|
# inner packets are malformed (no surprise there). There's also no dpd.log
|
|
# since the teredo analyzer doesn't confirm until it's seen a valid teredo
|
|
# encapsulation in both directions and protocol violations aren't logged
|
|
# until there's been a confirmation.
|
|
|
|
# In either case, the analyzer doesn't, by default, get disabled as a result
|
|
# of the protocol violations.
|
|
|
|
function print_teredo(name: string, outer: connection, inner: teredo_hdr)
|
|
{
|
|
print fmt("%s: %s", name, outer$id);
|
|
print fmt(" ip6: %s", inner$hdr$ip6);
|
|
if ( inner?$auth )
|
|
print fmt(" auth: %s", inner$auth);
|
|
if ( inner?$origin )
|
|
print fmt(" origin: %s", inner$origin);
|
|
}
|
|
|
|
event teredo_packet(outer: connection, inner: teredo_hdr)
|
|
{
|
|
print_teredo("packet", outer, inner);
|
|
}
|
|
|
|
event teredo_authentication(outer: connection, inner: teredo_hdr)
|
|
{
|
|
print_teredo("auth", outer, inner);
|
|
}
|
|
|
|
event teredo_origin_indication(outer: connection, inner: teredo_hdr)
|
|
{
|
|
print_teredo("origin", outer, inner);
|
|
}
|
|
|
|
event teredo_bubble(outer: connection, inner: teredo_hdr)
|
|
{
|
|
print_teredo("bubble", outer, inner);
|
|
}
|