#!/bin/sh
[ -z "$2" ] && echo "Error: should be run by odhcpc6c" && exit 1
. /lib/functions.sh
. /lib/netifd/netifd-proto.sh

setup_interface () {
	local device="$1"
	proto_init_update "*" 1

	# Merge RA-DNS
	for radns in $RA_DNS; do
		local duplicate=0
		for dns in $RDNSS; do
			[ "$radns" = "$dns" ] && duplicate=1
		done
		[ "$duplicate" = 0 ] && RDNSS="$RDNSS $radns"
	done

	for dns in $RDNSS; do
		proto_add_dns_server "$dns"
	done

	for domain in $DOMAINS; do
		proto_add_dns_search "$domain"
	done

	for prefix in $PREFIXES; do
		proto_add_ipv6_prefix "$prefix"
	done

	[ -n "$USERPREFIX" ] && proto_add_ipv6_prefix "$USERPREFIX"

	# Merge addresses
	for entry in $RA_ADDRESSES; do
		local duplicate=0
		local addr="${entry%%/*}"
		for dentry in $ADDRESSES; do
			local daddr="${dentry%%/*}"
			[ "$addr" = "$daddr" ] && duplicate=1
		done
		[ "$duplicate" = "0" ] && ADDRESSES="$ADDRESSES $entry"
	done

	for entry in $ADDRESSES; do
		local addr="${entry%%/*}"
		entry="${entry#*/}"
		local mask="${entry%%,*}"
		entry="${entry#*,}"
		local preferred="${entry%%,*}"
		entry="${entry#*,}"
		local valid="${entry%%,*}"

		proto_add_ipv6_address "$addr" "$mask" "$preferred" "$valid" 1
	done

	for entry in $RA_ROUTES; do
		local addr="${entry%%/*}"
		entry="${entry#*/}"
		local mask="${entry%%,*}"
		entry="${entry#*,}"
		local gw="${entry%%,*}"
		entry="${entry#*,}"
		local valid="${entry%%,*}"
		entry="${entry#*,}"
		local metric="${entry%%,*}"

		if [ -z "$SOURCE_ROUTING" -o -z "$gw" ]; then
			proto_add_ipv6_route "$addr" "$mask" "$gw" "$metric" "$valid"
		else
			proto_add_ipv6_route "$addr" "$mask" "$gw" "$metric" "$valid" "::/128"
			for prefix in $PREFIXES; do
				local paddr="${prefix%%,*}"
				proto_add_ipv6_route "$addr" "$mask" "$gw" "$metric" "$valid" "$paddr"
			done
		fi
	done

	proto_send_update "$INTERFACE"

	if [ -n "$AFTR_IP " -a -n "$IFACE_DSLITE" ]; then
uci -q batch <<-EOF >/dev/null
set network.$IFACE_DSLITE.proto=dslite
set network.$IFACE_DSLITE.auto=0
set network.$IFACE_DSLITE.peeraddr=$AFTR_IP
set network.$IFACE_DSLITE.tunlink=$INTERFACE
commit network
EOF

		ifdown "$IFACE_DSLITE"
		/etc/init.d/network reload
		ifup "$IFACE_DSLITE"
	fi

	# TODO: $SNTP_IP $SIP_IP $SNTP_FQDN $SIP_DOMAIN
}

teardown_interface() {
	proto_init_update "*" 0
	proto_send_update "$INTERFACE"
}

case "$2" in
	bound)
		teardown_interface "$1"
		setup_interface "$1"
	;;
	informed|updated|rebound|ra-updated)
		setup_interface "$1"
	;;
	started|stopped|unbound)
		teardown_interface "$1"
	;;
esac

# user rules
[ -f /etc/odhcp6c.user ] && . /etc/odhcp6c.user

exit 0