31 lines
970 B
Plaintext
31 lines
970 B
Plaintext
##! 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 :zeek: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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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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## analyzer 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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option packet_segment_size: int = 255;
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}
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event analyzer_violation_info(atype: AllAnalyzers::Tag, info: AnalyzerViolationInfo) &priority=4
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{
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if ( ! is_protocol_analyzer(atype) && ! is_packet_analyzer(atype) )
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return;
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if ( ! info?$c || ! info$c?$dpd )
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return;
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info$c$dpd$packet_segment = fmt("%s", sub_bytes(get_current_packet()$data, 0, packet_segment_size));
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}
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