[Snort-users] format of unified log file?

Joe Patterson jpatterson at ...12705...
Fri Feb 11 11:13:43 EST 2005

The way that I figured it out was to look at the spo_unified.c, and parse
out the various struct's within that.  Yes, it's C, but it's not
particularly complicated to logically parse out the structure.  Look at
these structures: UnifiedLogFileHeader, UnifiedLog, Event, SnortPktHeader.
Basically, the log file starts with a UnifiedLogFileHeader, and then has a
bunch of UnifiedLog's, which consist of an Event struct, 32 bits of flags,
and a SnortPktHeader struct. (and then, I believe, caplen worth of actual
payload data), followed by a new UnifiedLog.


> -----Original Message-----
> From: snort-users-admin at lists.sourceforge.net
> [mailto:snort-users-admin at lists.sourceforge.net]On Behalf Of Rob Baxter
> Sent: Friday, February 11, 2005 8:04 AM
> To: snort-users at lists.sourceforge.net
> Subject: [Snort-users] format of unified log file?
> I apologize if this has been covered before, but I am looking to write a
> utility to parse the binary unified log files produced by snort.
> According to the snort Users Guide the binary log file format is
> described in the spo_unified.h header file, however when I look at that
> file I don't see anything resembling a file format desc (in fact the
> file has < 30 including comments). Am I looking in the wrong place
> (src/output-plugins directory of the 2.3.0 distribution). Would I find
> the description in an older revision of this file (appears that I'm
> looking at v1.9), or where else might I find the documentation on how
> that file is layed out? I might be able to figure it out by looking at
> the input processors for mudpit and/or barnyard, but my C is terribly
> rusty so I'd prefer to have some documentation. If anyone can point me
> in the right direction it'd be greatly appreciated. thanx,
> </rob>
> ---------------------------------------------------
> Robert M. Baxter
> Sr. Security Analyst
> Xapiens Corporation
> ---------------------------------------------------
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