# Grammar file to parse Cisco CDP information

# show cdp neighbor detail

#

# Copyright (c) 2010  Tomas Zeman <tzeman@volny.cz>

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted providing that the following conditions 

# are met:

# 1. Redistributions of source code must retain the above copyright

#    notice, this list of conditions and the following disclaimer.

# 2. Redistributions in binary form must reproduce the above copyright

#    notice, this list of conditions and the following disclaimer in the

#    documentation and/or other materials provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

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{ # perl code follows

$::res = {};

$::res->{cdp} = ();

$::cur_cdp = {};

my $seen_neighbor = 0;

sub init_cur_cdp() {

	$::cur_cdp = {

		'neighbor' => '',

		'ip' => [],

		lport => '',

		rport => '',

	};

}

sub push_cur_cdp() {

	push @{$::res->{cdp}}, $::cur_cdp if ($seen_neighbor);

	$seen_neighbor = 0;

}

}

file:		<skip: qr/[^\S\n]*/>	# Ignore non-newline whitespace

		line(s) eofile

line:		neighbor_line

		| entry_address

		| neighbor_port

		| word(s) eol

		| word(s) eofile

		| emptyline

		| <error>

emptyline:	eol

word:		/\S+/  # any non-space

		{ $item[1] }

eofile:		/^\Z/

		{ push_cur_cdp; }

eol:		/\n/

identifier:	/[0-9a-zA-Z:_\.-]+/

		{ $item[1] }

ip:		/\d+\.\d+\.\d+\.\d+/

		{ $item[1] }

iface_name:	/\w+(-\w+)?( )?\d+[0-9\/\.:]*/

		{ $item[1] }

neighbor_line:	"Device ID:" identifier eol

		{

		push_cur_cdp;

		init_cur_cdp;

		$::cur_cdp->{'neighbor'} = $item{identifier};

		$seen_neighbor = 1;

		}

neighbor_port:	"Interface:" iface_name"," "Port ID (outgoing port):" iface_name eol

		{

		$::cur_cdp->{lport} = $item[2];

		$::cur_cdp->{rport} = $item[5];

		}

entry_address: "Entry address(es):" eol entry_ip_address(s)

entry_ip_address: "IP address:" ip eol

		{ push @{$::cur_cdp->{ip}}, $item{ip}; }