Patrice Auffret
and 1 contributors

NAME

Net::Packet::ARP - Address Resolution Protocol layer 3 object

SYNOPSIS

   use Net::Packet::Consts qw(:arp);
   require Net::Packet::ARP;

   # Build a layer
   my $layer = Net::Packet::ARP->new(
      dstIp => "192.168.0.1",
   );
   $layer->pack;

   print 'RAW: '.unpack('H*', $layer->raw)."\n";

   # Read a raw layer
   my $layer = Net::Packet::ARP->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 ARP layer.

RFC: ftp://ftp.rfc-editor.org/in-notes/rfc826.txt

See also Net::Packet::Layer and Net::Packet::Layer3 for other attributes and methods.

ATTRIBUTES

hType
pType

Hardware and protocol address types.

hSize
pSize

Hardware and protocol address sizes in bytes.

opCode

The operation code number to perform.

src
dst

Source and destination hardware addresses.

srcIp
dstIp

Source and destination IP addresses.

METHODS

new

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

hType: NP_ARP_HTYPE_ETH

pType: NP_ARP_PTYPE_IPv4

hSize: NP_ARP_HSIZE_ETH

pSize: NP_ARP_PSIZE_IPv4

opCode: NP_ARP_OPCODE_REQUEST

src: $Env->mac

dst: NP_ARP_ADDR_BROADCAST

srcIp: $Env->ip

dstIp: 127.0.0.1

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.

recv

Will search for a matching replies in framesSorted or frames from a Net::Packet::Dump object.

isRequest
isReply

Returns 1 if the opCode attribute is of specified type.

CONSTANTS

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

NP_ARP_HTYPE_ETH
NP_ARP_PTYPE_IPv4

Hardware and protocol address types.

NP_ARP_HSIZE_ETH
NP_ARP_PSIZE_IPv4

Hardware and protocol address sizes.

NP_ARP_OPCODE_REQUEST
NP_ARP_OPCODE_REPLY

Operation code numbers.

NP_ARP_ADDR_BROADCAST

Broadcast address for src or dst attributes.

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.

RELATED MODULES

NetPacket, Net::RawIP, Net::RawSock