zeek/scripts/policy/frameworks/dpd/packet-segment-logging.bro
Jon Siwek 47500ceef4 Add a test that checks each individual script can be loaded in bare-mode.
Fixed most @load dependency issues in the process.  The test is still
failing in a "known" way due to hot.conn.bro and scan.bro.

Adressess #545
2011-08-10 15:38:21 -05:00

29 lines
909 B
Text

##! This script enables logging of packet segment data when a protocol
##! parsing violation is encountered. The amount of
##! data from the packet logged is set by the packet_segment_size variable.
##! A caveat to logging packet data is that in some cases, the packet may
##! not be the packet that actually caused the protocol violation.
@load base/frameworks/dpd/main
module DPD;
export {
redef record Info += {
## A chunk of the payload the most likely resulted in the protocol
## violation.
packet_segment: string &optional &log;
};
## Size of the packet segment to display in the DPD log.
const packet_segment_size: int = 255 &redef;
}
event protocol_violation(c: connection, atype: count, aid: count,
reason: string) &priority=4
{
if ( ! c?$dpd ) return;
c$dpd$packet_segment=fmt("%s", sub_bytes(get_current_packet()$data, 0, packet_segment_size));
}