#!/bin/sh /etc/rc.common
# OpenVPN init script
# Copyright (C) 2008 Jo-Philipp Wich
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.

START=95
BIN=/usr/sbin/openvpn
SSD=start-stop-daemon
EXTRA_COMMANDS="up down"

LIST_SEP="
"

append_param() {
	local v="$1"
	case "$v" in
		*_*_*_*) v=${v%%_*}-${v#*_}; v=${v%%_*}-${v#*_}; v=${v%%_*}-${v#*_} ;;
		*_*_*)   v=${v%%_*}-${v#*_}; v=${v%%_*}-${v#*_} ;;
		*_*)     v=${v%%_*}-${v#*_} ;;
	esac
	ARGS="$ARGS --$v"
	return 0
}

append_bools() {
	local p; local v; local s="$1"; shift
	for p in $*; do
		config_get_bool v "$s" "$p"
		[ "$v" == 1 ] && append_param "$p"
	done
}

append_params() {
	local p; local v; local s="$1"; shift
	for p in $*; do
		config_get v "$s" "$p"
		IFS="$LIST_SEP"
		for v in $v; do
			[ -n "$v" ] && append_param "$p" && ARGS="$ARGS $v"
		done
		unset IFS
	done
}

append_params_quoted() {
	local p; local v; local s="$1"; shift
	for p in $*; do
		config_get v "$s" "$p"
		IFS="$LIST_SEP"
		for v in $v; do
			[ -n "$v" ] && append_param "$p" && ARGS="$ARGS '$v'"
		done
		unset IFS
	done
}

start_service() {
	local s="$1"
	local enable=0

	# disabled?
	config_get_bool enable "$s" enable 0
	[ "$enable" == 0 ] && return 0

	PID="/var/run/openvpn-$s.pid"
	ARGS=""

	# append flags
	append_bools "$s" \
		auth_nocache auth_retry auth_user_pass_optional bind ccd_exclusive client client_cert_not_required \
		client_disconnect client_to_client comp_lzo comp_noadapt disable \
		disable_occ down_pre duplicate_cn fast_io float http_proxy_retry \
		ifconfig_noexec ifconfig_nowarn ifconfig_pool_linear management_forget_disconnect management_hold \
		management_query_passwords management_signal mktun mlock mtu_test multihome mute_replay_warnings \
		nobind no_iv no_name_remapping no_replay opt_verify passtos persist_key persist_local_ip \
		persist_remote_ip persist_tun ping_timer_rem pull push_reset \
		remote_random rmtun route_noexec route_nopull single_session socks_proxy_retry \
		suppress_timestamps tcp_nodelay test_crypto tls_client tls_exit tls_server \
		tun_ipv6 up_delay up_restart username_as_common_name

	# append params
	append_params "$s" \
		askpass auth auth_user_pass auth_user_pass_verify bcast_buffers ca cd cert \
		chroot cipher client_config_dir client_connect config connect_freq \
		connect_retry connect_timeout connect_retry_max crl_verify dev dev_node dev_type dh \
		echo engine explicit_exit_notify fragment group hand_window hash_size \
		http_proxy http_proxy_option http_proxy_timeout ifconfig ifconfig_pool \
		ifconfig_pool_persist ifconfig_push inactive ipchange iroute keepalive \
		key key_method keysize learn_address link_mtu lladdr local log log_append \
		lport management management_log_cache max_clients \
		max_routes_per_client mode mssfix mtu_disc mute nice ns_cert_type ping \
		ping_exit ping_restart pkcs12 plugin port port_share prng proto rcvbuf \
		redirect_gateway remap_usr1 remote remote_cert_eku remote_cert_ku remote_cert_tls \
		reneg_bytes reneg_pkts reneg_sec \
		replay_persist replay_window resolv_retry route route_delay route_gateway \
		route_metric route_up rport script_security secret server server_bridge setenv shaper sndbuf \
		socks_proxy status status_version syslog tcp_queue_limit tls_auth \
		tls_cipher tls_remote tls_timeout tls_verify tmp_dir topology tran_window \
		tun_mtu tun_mtu_extra txqueuelen user verb

	# append multi-value params
	append_params_quoted "$s" \
		down push up


	[ -n "$ARGS" ] && \
		eval "$SSD -q -b -p '$PID' -x $BIN -S -- --syslog 'openvpn($s)' --writepid '$PID' $ARGS"
}

kill_service() {
	local s="$1"
	local S="${2:-TERM}"
	local enable=0

	# disabled?
	config_get_bool enable "$s" enable 0
	[ "$enable" == 0 ] && return 0

	PID="/var/run/openvpn-$s.pid"

	$SSD -q -p $PID -x $BIN -K -s $S
	[ "$S" == "TERM" ] && rm -f "$PID"
}

hup_service()  { kill_service "$1" HUP;  }
stop_service() { kill_service "$1" TERM; }

start() {
	config_load openvpn
	config_foreach start_service openvpn
}

stop() {
	config_load openvpn
	config_foreach stop_service openvpn
}

reload() {
	config_load openvpn
	config_foreach hup_service openvpn
}

restart() {
	stop; sleep 5; start
}

up() {
	local exists
	local INSTANCE
	config_load openvpn
	for INSTANCE in "$@"; do
		config_get exists "$INSTANCE" TYPE
		if [ "$exists" == "openvpn" ]; then
			start_service "$INSTANCE"
		fi
	done
}

down() {
	local exists
	local INSTANCE
	config_load openvpn
	for INSTANCE in "$@"; do
		config_get exists "$INSTANCE" TYPE
		if [ "$exists" == "openvpn" ]; then
			stop_service "$INSTANCE"
		fi
	done
}
