#!/bin/sh


# Small script for managing ipv6 proxying from a list
# of ipv6 address.
# See some other projects if you need something more elaborate :
#  http://priv.nu/projects/ndppd/
#  https://github.com/npd6/npd6/

CONFIG_FILE="$( echo "$0" | sed -e 's/.sh$//i' -e 's/$/.conf/' )"
INTERFACE="eth0"

# Fonctions
# affiche le message d'aide
usage() {
cat <<EOF
	$0 [ -c config] [ -i interface ] [ -l ]
	$0 -h

	-c configfile : use this file instead of "$CONFIG_FILE"
	-i interface : use this interface instead of "$INTERFACE"
	-l : cat the configfile on stdout without actually doing anything.

	configfile must simply be filled with one ipv6 address by line.
EOF
}

catconfigfile() {
	if [ ! -f "$1" ]; then
		return 1
	fi
	cat "$1" | sed 's/#.*//' | sed -e '/^[[:space:]]*$/d' -e 's/[[:space:]]*//g'
}


# Début du code
# gestion des options de lancement
while getopts c:i:lh f; do
	case $f in
		'c')
			if [ ! -f "$OPTARG" ]; then
				echo "ERROR: file '$OPTARG' not found." >&2
				exit 1
			fi
			CONFIG_FILE="$OPTARG"
			;;

		'i')
			INTERFACE="$OPTARG"
			;;

		'l')
			catconfigfile "$CONFIG_FILE"
			exit 0
			;;

		'h')
			usage
			exit 0
			;;

		\?)
			usage >&2
			exit 1
			;;
	esac
done
#(code inutile, mais que je garde parce qu'on ne sait jamais)
#shift $( expr $OPTIND - 1 )
#DATA="$1"

catconfigfile "$CONFIG_FILE" | while read line; do
	ip -6 neigh add proxy "$line" nud permanent dev "$INTERFACE"
done