#!/bin/sh /etc/rc.common
# shellcheck disable=SC2039
# vim: set noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 :

# shellcheck disable=SC2034
{
	START=90
	STOP=10
	USE_PROCD=1
}

PROG_NAME=glorytun
PROG=/usr/sbin/$PROG_NAME

_log() {
	logger -p daemon.info -t $PROG_NAME "$@"
}

_err() {
	logger -p daemon.err -t $PROG_NAME "$@"
}

validate_section() {
	uci_validate_section glorytun mud "$1" \
		'enable:bool:0'        \
		'key:string'           \
		'server:host'          \
		'port:port'            \
		'dev:string'
}

start_instance() {
	local enable key server port dev

	validate_section "$1" || {
		_err "validation failed"
		return 1
	}

	[ "$enable" = "1" ] || return
	[ "$key"    ] || return
	[ "$server" ] || return
	[ "$port"   ] || return

	keyfile="/tmp/$PROG_NAME.key"
	( umask 077; echo "$key" > "$keyfile" )
	key=""

	_log "starting $PROG_NAME instance $*"

	procd_open_instance

	procd_set_param command $PROG \
		bind "0.0.0.0" "$port" \
		to "$server" "$port" \
		keyfile "$keyfile" \
		${dev:+dev "$dev"}

	procd_set_param respawn 0 30 0
	procd_set_param file "$keyfile"

	procd_set_param stdout 1
	procd_set_param stderr 1

	procd_close_instance
}

start_service() {
	config_load glorytun
	config_foreach start_instance mud
}

service_triggers() {
	procd_add_reload_trigger glorytun
}