Net::Packet::UDP

Section: User Contributed Perl Documentation (3pm)
Updated: 2009-11-09
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NAME

Net::Packet::UDP - User Datagram Protocol layer 4 object

SYNOPSIS

   use Net::Packet::Consts qw(:udp);
   require Net::Packet::UDP;

   # Build a layer
   my $layer = Net::Packet::UDP->new(
      dst => 31222,
   );
   $layer->pack;

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

   # Read a raw layer
   my $layer = Net::Packet::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::Packet::Layer and Net::Packet::Layer4 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.

METHODS

new

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

src: getRandomHighPort()

dst: 0

length: 0

checksum: 0

recv

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

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.

getPayloadLength

Returns the length in bytes of payload (layer 7 object).

AUTHOR

Patrice <GomoR> Auffret

COPYRIGHT AND LICENSE

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

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