NAME

Net::Frame::Layer::UDP - User Datagram Protocol layer object

SYNOPSIS

use Net::Frame::Layer::UDP qw(:consts);

# Build a layer
my $layer = Net::Frame::Layer::UDP->new(
   src      => getRandomHighPort(),
   dst      => 0,
   length   => 0,
   checksum => 0,
);
$layer->pack;

print 'RAW: '.$layer->dump."\n";

# Read a raw layer
my $layer = Net::Frame::Layer::UDP->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 UDP layer.

RFC: ftp://ftp.rfc-editor.org/in-notes/rfc768.txt

See also Net::Frame::Layer for other attributes and methods.

ATTRIBUTES

src

dst

Source and destination ports.

length

The length in bytes of the datagram, including layer 7 payload (that is, layer 4 + layer 7).

checksum

Checksum of the datagram.

The following are inherited attributes. See Net::Frame::Layer for more information.

raw

payload

nextLayer

METHODS

new

new (hash)

Object constructor. You can pass attributes that will overwrite default ones. See SYNOPSIS for default values.

computeLengths

Computes various lengths contained within this layer.

computeChecksums ({ type => PROTO, src => IP, dst => IP })

In order to compute checksums of TCP, you need to pass the protocol type (IPv4, IPv6), the source and destination IP addresses (IPv4 for IPv4, IPv6 for IPv6).

getKey

getKeyReverse

These two methods are basically used to increase the speed when using recv method from Net::Frame::Simple. Usually, you write them when you need to write match method.

match (Net::Frame::Layer::UDP object)

This method is mostly used internally. You pass a Net::Frame::Layer::UDP layer as a parameter, and it returns true if this is a response corresponding for the request, or returns false if not.

The following are inherited methods. Some of them may be overriden in this layer, and some others may not be meaningful in this layer. See Net::Frame::Layer for more information.

layer

computeLengths

computeChecksums

pack

unpack

encapsulate

getLength

getPayloadLength

print

dump

CONSTANTS

No constants here.

SEE ALSO

Net::Frame::Layer

AUTHOR

Patrice <GomoR> Auffret

COPYRIGHT AND LICENSE

Copyright (c) 2006-2007, Patrice <GomoR> Auffret

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