#!/bin/sh

#

# Setup address label from /etc/gai.conf

#

# Written by YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>, 2010.

#

IP=ip

DEFAULT_GAICONF=/etc/gai.conf

verbose=

debug=

function run ()

{

	if [ x"$verbose" != x"" ]; then

		echo "$@"

	fi

	if [ x"$debug" = x"" ]; then

		"$@"

	fi

}

function do_load_config ()

{

	file=$1; shift

	flush=1

	cat $file | while read command prefix label; do

		if [ x"$command" = x"#label" ]; then

			if [ ${flush} = 1 ]; then

				run ${IP} -6 addrlabel flush

				flush=0

			fi

			run ${IP} -6 addrlabel add prefix $prefix label $label

		fi

	done

}

function do_list_config ()

{

	${IP} -6 addrlabel list | while read p pfx l lbl; do

		echo label ${pfx} ${lbl}

	done

}

function help ()

{

	echo "Usage: $0 [-v] {--list | --config [ ${DEFAULT_GAICONF} ] | --default}"

	exit 1

}

TEMP=`getopt -o c::dlv -l config::,default,list,verbose -n gaiconf -- "$@"`

if [ $? != 0 ]; then

	echo "Terminating..." >&2

	exit 1

fi

TEMPFILE=`mktemp`

eval set -- "$TEMP"

while true ; do

	case "$1" in

		-c|--config)

			if [ x"$cmd" != x"" ]; then

				help

			fi

			case "$2" in

			"")	gai_conf="${DEFAULT_GAICONF}"

				shift 2

				;;

			*)	gai_conf="$2"

				shift 2

			esac

			cmd=config

			;;

		-d|--default)

			if [ x"$cmd" != x"" ]; then

				help

			fi

			gai_conf=${TEMPFILE}

			cmd=config

			;;

		-l|--list)

			if [ x"$cmd" != x"" ]; then

				help

			fi

			cmd=list

			shift

			;;

		-v)

			verbose=1

			shift

			;;

		--)

			shift;

			break

			;;

		*)

			echo "Internal error!" >&2

			exit 1

			;;

	esac

done

case "$cmd" in

	config)

		if [ x"$gai_conf" = x"${TEMPFILE}" ]; then

			sed -e 's/^[[:space:]]*//' <<END_OF_DEFAULT >${TEMPFILE}

				label ::1/128       0

				label ::/0          1

				label 2002::/16     2

				label ::/96         3

				label ::ffff:0:0/96 4

				label fec0::/10     5

				label fc00::/7      6

				label 2001:0::/32   7

END_OF_DEFAULT

		fi

		do_load_config "$gai_conf"

		;;

	list)

		do_list_config

		;;

	*)

		help

		;;

esac

rm -f "${TEMPFILE}"

exit 0