NAME
    Net::IANA::PortNumbers - translate ports to services and vice versa

SYNOPSIS
      use Net::IANA::PortNumbers;

      my $iana = Net::IANA::PortNumbers->new();

      my $svc2port = $iana->svc2port('http', 'tcp') || 'No such service';
      my $svc2desc = $iana->svc2desc('http', 'tcp') || 'No such service';
      my $port2svc = $iana->port2svc(53, 'udp') || 'Unassigned port';
      my $port2desc = $iana->port2desc(53, 'udp') || 'Unassigned port';

      print @{$svc2port}, "\n";  # 80
      print $svc2desc, "\n";  # World Wide Web HTTP
      print $port2svc, "\n";  # domain
      print $port2desc, "\n"; # Domain Name Server

DESCRIPTION
    Net::IANA::PortNumbers uses the official IANA port number registry at
    the protocol/number assignments directory located at:

    http://www.iana.org/assignments/port-numbers

    Net::IANA::PortNumbers translates port numbers to services and
    descriptions, and services to port numbers and descriptions.

METHODS
    * new
        This constructor returns a Net::IANA::PortNumbers object. It accepts
        no arguments and will initialize its internal database.

    * last_updated
        This object method takes no arguments. Net::IANA::PortNumbers'
        internal database is primed from the IANA port registry. This method
        returns the date that the IANA port registry stated that it was last
        updated. Note that this is not necessarily the same date that
        Net::IANA::PortNumbers was last updated.

    * svc2port
        This object method takes two mandatory arguments of a service and a
        protocol. It will return an array reference. It will either be empty
        or populated depending on if the service exists. The method is also
        aliased to svc2ports.

    * svc2desc
        This object method takes two mandatory arguments of a service and a
        protocol. It will return a service description or undefined if there
        is no such service.

    * port2svc
        This object method takes two mandatory arguments of a port and a
        protocol. It will return a service or undefined if the port is
        unassigned.

    * port2desc
        This object method takes two mandatory arguments of a port and a
        protocol. It will return a service description or undefined if the
        port is unassigned.

COPYRIGHT
    Copyright (c) 2003 Adam J. Foxson. All rights reserved.

LICENSE
    See COPYING

CAVEATS
    See CAVEATS

SEE ALSO
    * perl
    * Net::servent

AUTHOR
    Adam J. Foxson