#!/bin/sh /etc/rc.common
# Copyright (c) 2011-2015 OpenWrt.org

START=99
USE_PROCD=1
PROG=/usr/bin/vlmcsd

get_config() {
	config_get_bool enabled $1 enabled 0
	config_get autoactivate $1 autoactivate 0
	config_get firewall $1 firewall 0
}

add_vlmcs_entry() {
	local new_hostname="$1"

	uci -q batch <<-EOF >/dev/null
		add dhcp srvhost
		set dhcp.@srvhost[-1].srv=_vlmcs._tcp
		set dhcp.@srvhost[-1].target=$new_hostname
		set dhcp.@srvhost[-1].port=1688
		set dhcp.@srvhost[-1].class=0
		set dhcp.@srvhost[-1].weight=100
		commit dhcp
	EOF

	/etc/init.d/dnsmasq reload
}

set_firewall() {
	if [ "$external_access" = "allow" ]; then
		uci -q delete firewall.vlmcsd
		uci set firewall.vlmcsd=rule
		uci set firewall.vlmcsd.name="vlmcsd"
		uci set firewall.vlmcsd.target="ACCEPT"
		uci set firewall.vlmcsd.src="*"
		uci set firewall.vlmcsd.proto="tcp"
		uci set firewall.vlmcsd.dest_port="1688"
		uci set firewall.vlmcsd.enabled="1"
		uci commit firewall
		/etc/init.d/firewall reload >/dev/null 2>&1
	elif [ "$external_access" = "deny" ]; then
		uci -q delete firewall.vlmcsd
		uci commit firewall
		/etc/init.d/firewall reload >/dev/null 2>&1
	fi
}

start_service() {
	config_load vlmcsd
	config_foreach get_config vlmcsd

	[ $enabled -eq 0 ] && return 0

	[ "$firewall" -eq "1" ] && external_access="allow" || external_access="deny"
	set_firewall

	procd_open_instance vlmcsd
	procd_set_param command $PROG
	procd_append_param command -D
	procd_append_param command -i "/etc/vlmcsd/vlmcsd.ini"
	procd_append_param command -L "0.0.0.0:1688"
	procd_append_param command -L "[::]:1688"
	procd_set_param stdout 1
	procd_set_param stderr 1
	procd_set_param respawn
	procd_close_instance vlmcsd

	if [ $autoactivate -eq 1 ]; then
		local HOSTNAME=`uci get system.@system[0].hostname`

		local index=$(uci -q show dhcp |grep "].srv='_vlmcs._tcp'") \
			|| add_vlmcs_entry $HOSTNAME
		index=${index#*[}
		index=${index%]*}

		local host_name=$(uci -q get dhcp.@srvhost[$index].target)

		if [ "$HOSTNAME" != "$host_name" ]; then
			uci delete dhcp.@srvhost[$index]
			add_vlmcs_entry $HOSTNAME
		fi
	else
		uci -q show dhcp | grep 'srvhost\[[0-9]\].srv.*vlmcs' && {
			index=$(uci -q show dhcp |grep "].srv='_vlmcs._tcp'")
			index=${index#*[}
			index=${index%]*}
			uci delete dhcp.@srvhost[$index]
			/etc/init.d/dnsmasq reload
		}
	fi
}

service_triggers() {
	procd_add_reload_trigger "vlmcsd"
}

stop_service() {
	external_access="deny"
	set_firewall
}

reload_service() {
	stop
	sleep 1
	start
}