[Bro] conn.bro

Christian Kreibich christian at whoop.org
Wed Aug 3 13:30:21 PDT 2005

Hi Mike,

On Wed, 2005-08-03 at 10:06 -0500, Mike Muratet wrote:
> Greetings
> I have been doing some experiments with broccoli (thanks again, Christian) 
> and I'm trying to understand the differences between what I see in real time 
> from broccoli vis a vis some earlier work I did using bro -r a_tcpdump_file 
> conn.bro. Looking at the conn.bro policy, it looks like it records a 
> connection record for the events connection_attempt, _partial_close, 
> _finished, _half_finished, _rejected, and _reset, using 
> record_connection(connection_record, string).

uhmmm is this using a recent Bro? On 0.9x record_connection() is only
triggered when a connection is expired, that is, from event
connection_state_remove(). Also, its signature is

  function record_connection(f: file, c: connection)

> The string  parameter denotes 
> the type of event, but this does not get printed. It does record a state as 
> part of the connection record which gives you an idea of what the event was 
> all about. Is my interpretation correct?

Yes, record_connection() prints a summary of the connection's lifetime,
including a short summary of how Bro thinks it got created, torn down,
etc. See



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