/ 
File-PCAP-v0.1.1
River stage zero No dependents
/ File::PCAP::ACAP2PCAP

NAME

File::PCAP::ACAP2PCAP - convert ASA capture to PCAP

VERSION

Version v0.1.1

SYNOPSIS

This module converts Cisco ASA packet capture outputs to PCAP files.

use File::PCAP::ACAP2PCAP;

my $a2p = File::PCAP::ACAP2PCAP->new( $args );

$a2p->parse(\*STDIN);

SUBROUTINES/METHODS

new( $args )

Creates a new object, takes a hash reference as argument with the following keys:

my $a2p = File::PCAP::ACAP2PCAP( {
    dlt      => $dlt,              # data link type, see below
    output   => $fname,            # filename for PCAP output
    startday => $day,              # day the first packet was captured
} );

The data link type is put in the PCAP global header. It defaults to 1 (Ethernet). There are some versions of Cisco software that output raw IP headers. For these use 101 (Raw IP) and for more information on data link types, see http://www.tcpdump.org/linktypes.html.

The startday argument allows to provide a different day for the first captured packet, it defaults to the current day. All timestamps in the generated packet capture are based on 00:00 UTC of this day. If there are timestamps that are smaller than previously parsed timestamps, a new day is assumed and the base value for the timestamps is increased by 86400 (one day). You may want to provide this argument with a date in the past when a packet capture runs over midnight.

parse( $fd )

This function does the parsing of the ASA output from an IO stream.

To parse STDIN, you would do something like the following:

$a2p->parse(\*STDIN);

To parse a file given by name, you open it and take the file handle:

if (open(my $input,'<',$filename)) {
  $a2p->parse($input);
  close $input;
}

To write the packets into the PCAP file this function uses File::PCAP::Writer->packet().

SEE ALSO

Libpcap File Format https://wiki.wireshark.org/Development/LibpcapFileFormat

Link-Layer Header Types http://www.tcpdump.org/linktypes.html

AUTHOR

Mathias Weidner, <mamawe at cpan.org>

BUGS

Please report any bugs or feature requests to bug-file-pcap at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=File-PCAP. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

perldoc File::PCAP

You can also look for information at:

LICENSE AND COPYRIGHT

Copyright 2017 Mathias Weidner.

This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:

http://www.perlfoundation.org/artistic_license_2_0

Any use, modification, and distribution of the Standard or Modified Versions is governed by this Artistic License. By using, modifying or distributing the Package, you accept this license. Do not use, modify, or distribute the Package, if you do not accept this license.

If your Modified Version has been derived from a Modified Version made by someone other than you, you are nevertheless required to ensure that your Modified Version complies with the requirements of this license.

This license does not grant you the right to use any trademark, service mark, tradename, or logo of the Copyright Holder.

This license includes the non-exclusive, worldwide, free-of-charge patent license to make, have made, use, offer to sell, sell, import and otherwise transfer the Package with respect to any patent claims licensable by the Copyright Holder that are necessarily infringed by the Package. If you institute patent litigation (including a cross-claim or counterclaim) against any party alleging that the Package constitutes direct or contributory patent infringement, then this Artistic License to you shall terminate on the date that such litigation is filed.

Disclaimer of Warranty: THE PACKAGE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES. THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED TO THE EXTENT PERMITTED BY YOUR LOCAL LAW. UNLESS REQUIRED BY LAW, NO COPYRIGHT HOLDER OR CONTRIBUTOR WILL BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING IN ANY WAY OUT OF THE USE OF THE PACKAGE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.