zeek/scripts/policy/protocols/smtp/entities-excerpt.zeek
Jon Siwek aebcb1415d GH-234: rename Broxygen to Zeexygen along with roles/directives
* All "Broxygen" usages have been replaced in
  code, documentation, filenames, etc.

* Sphinx roles/directives like ":bro:see" are now ":zeek:see"

* The "--broxygen" command-line option is now "--zeexygen"
2019-04-22 19:45:50 -07:00

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##! This script is for optionally adding a body excerpt to the SMTP
##! entities log.
@load base/protocols/smtp/entities
module SMTP;
export {
redef record SMTP::Entity+= {
## 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
## :zeek:see:`default_file_bof_buffer_size` will be used.
option default_entity_excerpt_len = 0;
}
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, c in f$conns )
{
if ( ! c?$smtp ) next;
if ( default_entity_excerpt_len > 0 )
c$smtp$entity$excerpt = f$bof_buffer[0:default_entity_excerpt_len];
}
}