zeek/scripts/base/protocols/smtp/entities-excerpt.bro
Jon Siwek d9321e2203 FileAnalysis: remove some file events.
The file_new event now takes over the function of file_type, file_bof,
and file_bof_buffer.
2013-04-10 14:34:23 -05:00

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##! This script is for optionally adding a body excerpt to the SMTP
##! entities log.
@load ./entities
module SMTP;
export {
redef record SMTP::EntityInfo += {
## The entity body excerpt.
excerpt: string &log &default="";
};
## This is the default value for how much of the entity body should be
## included for all MIME entities. The lesser of this value and
## :bro:see:`default_file_bof_buffer_size` will be used.
const default_entity_excerpt_len = 0 &redef;
}
event file_new(f: fa_file) &priority=5
{
if ( ! f?$source ) return;
if ( f$source != "SMTP" ) return;
if ( ! f?$bof_buffer ) return;
if ( ! f?$conns ) return;
for ( cid in f$conns )
{
local c: connection = f$conns[cid];
if ( ! c?$smtp ) next;
if ( default_entity_excerpt_len > 0 )
c$smtp$current_entity$excerpt =
f$bof_buffer[0:default_entity_excerpt_len];
}
}