#!/bin/sh /etc/rc.common
# Copyright (C) 2010 Jo-Philipp Wich

START=50
UHTTPD_BIN="/usr/sbin/uhttpd"
PX5G_BIN="/usr/sbin/px5g"


append_arg() {
	local cfg="$1"
	local var="$2"
	local opt="$3"
	local def="$4"
	local val

	config_get val "$cfg" "$var"
	[ -n "$val" -o -n "$def" ] && append UHTTPD_ARGS "$opt ${val:-$def}"
}

generate_keys() {
	local cfg="$1"
	local key="$2"
	local crt="$3"
	local days bits country state location commonname

	config_get days       "$cfg" days
	config_get bits       "$cfg" bits
	config_get country    "$cfg" country
	config_get state      "$cfg" state
	config_get location   "$cfg" location
	config_get commonname "$cfg" commonname

	[ -x "$PX5G_BIN" ] && {
		$PX5G_BIN selfsigned -der \
			-days ${days:-730} -newkey rsa:${bits:-1024} -keyout "$UHTTPD_KEY" -out "$UHTTPD_CERT" \
			-subj /C=${country:-DE}/ST=${state:-Saxony}/L=${location:-Leipzig}/CN=${commonname:-OpenWrt}
	} || {
		echo "WARNING: the specified certificate and key" \
			"files do not exist and the px5g generator" \
			"is not available, skipping SSL setup."
	}	
}

start_instance()
{
	UHTTPD_ARGS=""
	UHTTPD_CERT=""
	UHTTPD_KEY=""

	local cfg="$1"
	local realm="$(uci_get system.@system[0].hostname)"
	local listen http https

	append_arg "$cfg" home "-h"
	append_arg "$cfg" realm "-r" "${realm:-OpenWrt}"
	append_arg "$cfg" config "-c"
	append_arg "$cfg" cgi_prefix "-x"
	append_arg "$cfg" lua_prefix "-l"
	append_arg "$cfg" lua_handler "-L"
	append_arg "$cfg" script_timeout "-t"
	append_arg "$cfg" network_timeout "-T"

	config_get http "$cfg" listen_http
	for listen in $http; do
		append UHTTPD_ARGS "-p $listen"
	done

	config_get https "$cfg" listen_https
	config_get UHTTPD_KEY  "$cfg" key  /etc/uhttpd.key
	config_get UHTTPD_CERT "$cfg" cert /etc/uhttpd.crt

	[ -n "$https" ] && {
		[ -f "$UHTTPD_CERT" -a -f "$UHTTPD_KEY" ] || {
			config_foreach generate_keys cert
		}

		[ -f "$UHTTPD_CERT" -a -f "$UHTTPD_KEY" ] && {
			append_arg "$cfg" cert "-C"
			append_arg "$cfg" key  "-K"

			for listen in $https; do
				append UHTTPD_ARGS "-s $listen"
			done
		}
	}

	start-stop-daemon -S -x $UHTTPD_BIN \
		-p /var/run/uhttpd_${cfg}.pid \
		-m -b -- -f $UHTTPD_ARGS
}

stop_instance()
{
	local cfg="$1"

	[ -f /var/run/uhttpd_${cfg}.pid ] && {
		start-stop-daemon -K -q -n ${UHTTPD_BIN##*/} \
			-p /var/run/uhttpd_${cfg}.pid -s TERM

		rm -f /var/run/uhttpd_${cfg}.pid
	}
}

start() {
	config_load uhttpd
	config_foreach start_instance uhttpd
}

stop() {
	config_load uhttpd
	config_foreach stop_instance uhttpd
}