NAME
Net::Packet::ETH - Ethernet/802.3 layer 2 object
SYNOPSIS
use Net::Packet::Consts qw(:eth);
require Net::Packet::ETH;
# Build a layer
my $layer = Net::Packet::ETH->new(
type => NP_ETH_TYPE_IPv6,
dst => "00:11:22:33:44:55",
);
$layer->pack;
print 'RAW: '.unpack('H*', $layer->raw)."\n";
# Read a raw layer
my $layer = Net::Packet::ETH->new(raw => $raw);
print $layer->print."\n";
print 'PAYLOAD: '.unpack('H*', $layer->payload)."\n"
if $layer->payload;DESCRIPTION
This modules implements the encoding and decoding of the Ethernet/802.3 layer.
RFC: ftp://ftp.rfc-editor.org/in-notes/rfc894.txt
See also Net::Packet::Layer and Net::Packet::Layer2 for other attributes and methods.
ATTRIBUTES
- src
- dst
-
Source and destination MAC addresses, in classical format (00:11:22:33:44:55).
- type
-
The encapsulated layer type (IPv4, IPv6 ...) for Ethernet. Values for Ethernet types are greater than 1500. If it is less than 1500, you should use the length attribute (which is an alias of this one), because the layer is considered a 802.3 one. See http://www.iana.org/assignments/ethernet-numbers .
- length
-
The length of the payload when this layer is a 802.3 one. This is the same attribute as type, but you cannot use it when calling new (you can only use it as an accessor after that).
METHODS
- new
-
Object constructor. You can pass attributes that will overwrite default ones. Default values:
src: $Env->mac (see Net::Packet::Env)
dst: NP_ETH_ADDR_BROADCAST
type/length: NP_ETH_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.
- isTypeArp
- isTypeIpv4
- isTypeIpv6
- isTypeIp - is type IPv4 or IPv6
- isTypeVlan
- isTypePppoe
-
Helper methods. Return true is the encapsulated layer is of specified type, false otherwise.
CONSTANTS
Load them: use Net::Packet::Consts qw(:eth);
- NP_ETH_HDR_LEN
-
Ethernet header length in bytes.
- NP_ETH_ADDR_BROADCAST
-
Ethernet broadcast address.
- NP_ETH_TYPE_IPv4
- NP_ETH_TYPE_IPv6
- NP_ETH_TYPE_ARP
- NP_ETH_TYPE_VLAN
- NP_ETH_TYPE_PPPoE
-
Various supported Ethernet types.
AUTHOR
Patrice <GomoR> Auffret
COPYRIGHT AND LICENSE
Copyright (c) 2004-2015, Patrice <GomoR> Auffret
You may distribute this module under the terms of the Artistic license. See LICENSE.Artistic file in the source distribution archive.