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