Net::ASN - Perl extension for manipulating autonomous system numbers

	##OO implementation (methods)

	use Net::ASN;

	my $asn = Net::ASN->new($ARGV[0]);

	print "type     : " . $asn->gettype     . "\n";
	print "asplain16: " . $asn->toasplain16 . "\n";
	print "asplain32: " . $asn->toasplain   . "\n";
	print "asdot    : " . $asn->toasdot     . "\n";
	print "asdotplus: " . $asn->toasdotplus . "\n";
	print "\n";

	##Non OO implementation (functions)

	use Net::ASN qw(:all);

	my $asplain = 12345;

	print "ASN in asdotplus format is " . plaintodotplus($asplain) . "\n";

	my $asdotplus = '1.1';

	print "ASN in asplain format is "   . dotplustoplain($asdotplus) . "\n";

Net::ASN provides functions for parsing autonomous system numbers (ASNs) as defined in RFC 1771 and extended by RFC4893, also converting between formats discussed in RFC5396.

Both an OO implementation (method based) and non-OO (function based) are provided for convenience.

new

	my $asn = Net::ASN->new(1234);		#Automatic parsing
	or
	my $asn = Net::ASN->new(1234,1);	#Parse as ASDOT

Creates a new Net::ASN object, prompting parsing of the supplied parameter, an ASN. Currently, only ASPLAIN and ASDOT+ are automatically recognised as input formats. If you wish to force input as ASDOT you must provide a second argument to the constructor.

gettype

	my $type = $asn->gettype;

Returns the type of ASN the parser assumes it is dealing with.

toasplain

	my $asplain = $asn->toasplain;

Returns the ASPLAIN representation of the parsed ASN

toasplain16

        my $asplain = $asn->toasplain16;

Returns the ASPLAIN representation of the parsed ASN if the ASPLAIN representation is is less than or equal to 65535, else returns AS_TRANS

Use for compabability with 16 bit ASN systems.

toasdot

	my $asdot = $asn->toasdot;

Returns the ASDOT representation of the parsed ASN. If the parsed ASN is ASPLAIN and less than or equal to 65535 then returns the ASPLAIN

toasdotplus

	my $asdotplus = $asn->toasdotplus;

Returns the ASDOT+ representation of the parsed ASN.

plaintodot

	my $asdot = plaintodot($asn);

Returns the ASDOT representation of the ASN ($asn) If $asn is ASPLAIN and less than or equal to 65535 then returns the ASPLAIN (Assumes your ASN is in ASPLAIN format)

plaintodotplus

	my $asdotplus = plaintodotplus($asn);

Returns the ASDOT+ representation of the ASN ($asn) (Assumes your ASN is in ASPLAIN format)

dottodotplus

        my $asplain = dottodotplus($asn);

Returns the ASDOT+ representation of the ASN ($asn) (Assumes your ASN is in ASDOT format)

dottoplain

        my $asplain = dottoplain($asn);

Returns the ASPLAIN representation of the ASN ($asn) (Assumes your ASN is in ASDOT format)

dottoplain16

        my $asplain = dottoplain16($asn);

Returns the ASPLAIN representation of the ASN ($asn) if the ASPLAIN representation is is less than or equal to 65535, else returns AS_TRANS (Assumes your ASN is in ASDOT format)

dotplustodot

	my $asdot = dotplustodot($asn);

Returns the ASDOT representation of the ASN ($asn) (Assumes your ASN is in ASDOT+ format)

dotplustoplain

	my $asplain = dotplustoplain($asn);

Returns the ASPLAIN representation of the ASN ($asn) (Assumes your ASN is in ASDOT+ format)

dotplustoplain16

	my $asplain = dotplustoplain16($asn);

Returns the ASPLAIN representation of the ASN ($asn) if the ASPLAIN representation is is less than or equal to 65535, else returns AS_TRANS (Assumes your ASN is in ASDOT+ format)

David J. Freedman <lochii AT convergence DOT cx>

Copyright (c) 2008 Convergence Inc. All rights reserved.

This program is free software; you can redistribute it and/or modify it under the terms as perl itself.

perl(1)