#
# $Id: RAW.pm 360 2015-01-20 18:36:06Z gomor $
#
package Net::Frame::Layer::RAW;
use strict;
use warnings;
use Net::Frame::Layer qw(:consts);
require Exporter;
our @ISA = qw(Net::Frame::Layer Exporter);
__PACKAGE__->cgBuildIndices;
our %EXPORT_TAGS = (
consts => [],
);
our @EXPORT_OK = (
@{$EXPORT_TAGS{consts}},
);
no strict 'vars';
sub pack {
my $self = shift;
$self->[$__raw] = '';
$self->[$__raw];
}
sub unpack {
my $self = shift;
$self->[$__payload] = $self->[$__raw];
$self;
}
sub encapsulate {
my $self = shift;
return $self->[$__nextLayer] if $self->[$__nextLayer];
return NF_LAYER_NONE if ! $self->[$__payload];
# With RAW layer, we must guess which type is the first layer
my $payload = CORE::unpack('H*', $self->[$__payload]);
# XXX: may not work on big-endian arch
if ($payload =~ /^4/) {
return 'IPv4';
}
elsif ($payload =~ /^6/) {
return 'IPv6';
}
elsif ($payload =~ /^0001....06/) {
return 'ARP';
}
return NF_LAYER_UNKNOWN;
}
sub print {
my $self = shift;
my $l = $self->layer;
"$l: empty";
}
1;
__END__
=head1 NAME
Net::Frame::Layer::RAW - empty layer object
=head1 SYNOPSIS
use Net::Frame::Layer::RAW qw(:consts);
# Build a layer
my $layer = Net::Frame::Layer::RAW->new;
$layer->pack;
print 'RAW: '.$layer->dump."\n";
# Read a raw layer
my $layer = Net::Frame::Layer::RAW->new(raw => $raw);
print $layer->print."\n";
print 'PAYLOAD: '.unpack('H*', $layer->payload)."\n"
if $layer->payload;
=head1 DESCRIPTION
This modules implements the encoding and decoding of the raw layer 2.
See also B<Net::Frame::Layer> for other attributes and methods.
=head1 ATTRIBUTES
No attributes in this layer.
The following are inherited attributes. See B<Net::Frame::Layer> for more information.
=over 4
=item B<raw>
=item B<payload>
=item B<nextLayer>
=back
=head1 METHODS
=over 4
=item B<new>
Object constructor. No default values, because no attributes here.
=back
The following are inherited methods. Some of them may be overridden in this layer, and some others may not be meaningful in this layer. See B<Net::Frame::Layer> for more information.
=over 4
=item B<layer>
=item B<computeLengths>
=item B<computeChecksums>
=item B<pack>
=item B<unpack>
=item B<encapsulate>
=item B<getLength>
=item B<getPayloadLength>
=item B<print>
=item B<dump>
=back
=head1 CONSTANTS
No constants here.
=head1 SEE ALSO
L<Net::Frame::Layer>
=head1 AUTHOR
Patrice E<lt>GomoRE<gt> Auffret
=head1 COPYRIGHT AND LICENSE
Copyright (c) 2006-2015, Patrice E<lt>GomoRE<gt> Auffret
You may distribute this module under the terms of the Artistic license.
See LICENSE.Artistic file in the source distribution archive.
=cut