#!/bin/sh
#
# Copyright (c) 2007-2015 Hajimu UMEMOTO <ume@mahoroba.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided 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 AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

# PROVIDE: dhcp6c_pd
# REQUIRE: mountcritremote
# KEYWORD: nojail nostart

. /etc/rc.subr

name="dhcp6c_pd"
rcvar=
command="%%_PREFIX_%%/sbin/dhcp6c"
start_precmd="dhcp6c_pd_prestart"
start_postcmd="dhcp6c_pd_poststart"
stop_precmd="dhcp6c_pd_precmd"
stop_cmd="dhcp6c_pd_stop"
restart_precmd="dhcp6c_pd_precmd"

# When dhcp6c gets signal, dhcp6c removes its pidfile immediately but
# dhcp6c might not terminate.
getpid()
{
	if [ -f "${pidfile}" ]; then
		read pid junk < ${pidfile}
		echo ${pid}
	else
		pgrep -f "dhcp6c -p ${pidfile}"
	fi
}

dhcp6c_pd_precmd()
{
	if [ -z "${dhcp6c_pd_interface}" ]; then
		warn "\$dhcp6c_pd_interface is not set."
		return 1
	fi
}

dhcp6c_pd_prestart()
{
	dhcp6c_pd_precmd

	pid=$(getpid)
	if [ -n "${pid}" ]; then
		dhcp6c_pd_stop
		sleep 2
	fi

	# create dhcp6c.conf
	sed -e "s/__INTERFACE__/${dhcp6c_pd_interface}/" \
	    -e "s/__PD_INTERFACE__/${dhcp6c_pd_rtadvd_interface}/" \
	    < ${dhcp6c_pd_conf_in} > ${dhcp6c_pd_conf}.${dhcp6c_pd_interface}

	# create dhcp6cctlkey
	#if [ ! -f %%_PREFIX_%%/etc/dhcp6cctlkey ]; then
	#	/sbin/md5 -q -s $(date "+%Y-%m-%d-%H-%M-%S") \
	#	    > %%_PREFIX_%%/etc/dhcp6cctlkey
	#fi
}

dhcp6c_pd_poststart()
{
	if checkyesno dhcp6c_pd_rtadvd_enable; then
		/sbin/sysctl net.inet6.ip6.accept_rtadv=0
		/sbin/sysctl net.inet6.ip6.forwarding=1
		/usr/sbin/rtadvd -c ${dhcp6c_pd_rtadvd_conf} \
		    ${dhcp6c_pd_rtadvd_interface}
	fi
}

dhcp6c_pd_stop()
{
	if checkyesno dhcp6c_pd_rtadvd_enable; then
		if [ -f "/var/run/rtadvd.pid" ]; then
			read pid junk < "/var/run/rtadvd.pid"
			kill ${pid}
			/sbin/sysctl net.inet6.ip6.accept_rtadv=1
			/sbin/sysctl net.inet6.ip6.forwarding=0
		fi
	fi

	pid=$(getpid)
	if [ -n "${pid}" ]; then
		kill ${pid}
		rm -f ${dhcp6c_pd_conf}.${dhcp6c_pd_interface}
	fi
}

load_rc_config ${name}
dhcp6c_pd_conf_in=${dhcp6c_pd_conf_in:-"%%CONFDIR%%/dhcp6c.conf.in"}
dhcp6c_pd_conf=${dhcp6c_pd_conf:-"/var/run/dhcp6c.conf"}
dhcp6c_pd_interface=${2:-${dhcp6c_pd_interface}}
dhcp6c_pd_localaddr=${3:-${dhcp6c_pd_localaddr}}
dhcp6c_pd_rtadvd_enable=${dhcp6c_pd_rtadvd_enable:-"NO"}
dhcp6c_pd_rtadvd_interface=${dhcp6c_pd_rtadvd_interface:-"%%PD_INTERFACE%%"}
dhcp6c_pd_rtadvd_conf=${dhcp6c_pd_rtadvd_conf:-"%%CONFDIR%%/rtadvd.conf"}
required_files="${dhcp6c_pd_conf_in}"
pidfile=/var/run/dhcp6c-${dhcp6c_pd_interface}.pid
command_args="-p ${pidfile} -c ${dhcp6c_pd_conf}.${dhcp6c_pd_interface} ${dhcp6c_pd_interface}"
if [ -n "${dhcp6c_pd_localaddr}" ]; then
	command_args="-A ${dhcp6c_pd_localaddr} ${command_args}"
fi
rc_fast=yes
run_rc_command "$1"