NAME

Net::Packet::NULL - BSD loopback layer 2 object

SYNOPSIS

# Usually, you do not use this module directly

use Net::Packet::NULL;

# Build layer to inject to network
my $null1 = Net::Packet::NULL->new;

# Decode from network to create the object
# Usually, you do not use this, it is used by Net::Packet::Frame
my $null2 = Net::Packet::NULL->new(raw => $rawFromNetwork);

print $null1->print, "\n";

DESCRIPTION

This modules implements the encoding and decoding of the BSD loopback layer.

See also Net::Packet::Layer and Net::Packet::Layer2 for other attributes and methods.

ATTRIBUTES

type

Stores the type of encapsulated upper layer.

METHODS

new

Object constructor. You can pass attributes that will overwrite default ones. Default values:

type: NP_NULL_TYPE_IPv4

pack

Packs all attributes into a raw format, in order to inject to network. Returns 1 on success, undef otherwise.

unpack

Unpacks raw data from network and stores attributes into the object. Returns 1 on success, undef otherwise.

isTypeIpv4

isTypeIpv6

isTypeIp - is type IPv4 or IPv6

Helper methods. Return true is the encapsulated upper layer is of specified type, false otherwise.

CONSTANTS

Load them: use Net::Packet::Consts qw(:null);

NP_NULL_HDR_LEN

NULL header length in bytes.

NP_NULL_TYPE_IPv4

NP_NULL_TYPE_IPv6

Various supported encapsulated layer types.

AUTHOR

Patrice <GomoR> Auffret

COPYRIGHT AND LICENSE

Copyright (c) 2004-2005, Patrice <GomoR> Auffret

You may distribute this module under the terms of the Artistic license. See Copying file in the source distribution archive.

RELATED MODULES

NetPacket, Net::RawIP, Net::RawSock