#!/usr/bin/awk -f

#
# ifconfig-parse.awk - parse output from ifconfig and print
#                      in format suitable for eval in shell
#
# Only Linux is supported, but *MULTIPLE* IP address per device.
#
# If you need parse ifconfig output on FreeBSD, use ifconfig-parse.sh
# script instead.
#
# Developed by Lubommir Host 'rajo' <rajo AT platon.sk>
# Copyright (c) 2006 Platon SDG
# Licensed under terms of GNU General Public License.
# All rights reserved.
#
# Changelog:
# 2006-01-12 - created
#

# $Platon: scripts/shell/firewall/ifconfig-parse.awk,v 1.3 2005/03/04 23:54:05 rajo Exp $

BEGIN {
	iface_count = 0;
}

/^[a-zA-Z0-9:]+[ \t]+/ { # Linux interface
	split($1, fields, ":");
	iface = fields[1];
	ipcount[iface]++;
	hwaddr[iface] = $NF;
	iface_count++;
}

/^[ \t]+inet addr:/ { # Linux IP address
	split($0, fields, "[ \t:]+");
	ip[iface, ipcount[iface]] = fields[4];
	bcast[iface] = fields[6]; # bad for loopback interface, but we don't need this
	idx = length(fields);
	mask[iface] = fields[idx];
}

/^[ \t]+inet6 addr:/ { # Linux IPv6 address
	split($0, fields, "[ \t]+");
	ip6[iface] = fields[4];
	scope6[iface] = fields[5];
}

END {
	for (i in ip6)		{ printf "IFACE_6_%s=\"%s\";	export IFACE_6_%s;\n",	i, ip6[i],		i; }
	for (i in scope6)	{ printf "SCOPE_6_%s=\"%s\";	export SCOPE_6_%s;\n",	i, scope6[i],	i; }
	for (i in bcast)	{ printf "Bcast_%s=\"%s\";		export Bcast_%s;\n",	i, bcast[i],	i; }
	for (i in mask)		{ printf "Mask_%s=\"%s\";		export Mask_%s;\n",		i, mask[i],		i; }
	for (i in hwaddr)	{ printf "HWaddr_%s=\"%s\";		export HWaddr_%s;\n",	i, hwaddr[i],	i; }
	for (i in ipcount)	{ printf "IPcount_%s=\"%s\";	export IPcount_%s;\n",	i, ipcount[i],	i; }
	for (i in ipcount) {
		printf "IP_%s=\"", i;
		for (n = 1; n <= ipcount[i]; n++) {
			printf "%s ", ip[i, n];
		}
		printf "\";	export IP_%s;\n", i;
	}
	printf "interfaces=\"";
	for (i in ipcount) { printf "%s ", i; }
	printf "\"; 	export interfaces;\n";
}