#!/bin/sh /etc/rc.common

. /lib/functions/network.sh

START=90
STOP=10

USE_PROCD=1
PROG=/usr/bin/owsd
CONFIGFILE="/etc/config/owsd"

DHCP_DOMAINS=""

load_dhcp_domains() {

	append_domain() {
		local domain=$1
		DHCP_DOMAINS="$DHCP_DOMAINS $domain"
	}

	dhcp_domain_section() {
		local section=$1
		local ip
		config_get ip "$section" ip
		[ -z "$ip" ] && config_list_foreach "$section" "name" append_domain
	}

	config_load dhcp # note: do not overload a config while parsing it
	config_foreach dhcp_domain_section "domain"
}

validate_owsd() {
	uci_validate_section "owsd" "owsd" "global" \
		'sock:string' \
		'redirect:string' \
		'www:string'
}

append_origin() {
	procd_append_param command -o"$1"
}

append_origin_parts() {
	local proto host port
	proto="$1"
	host="$2"
	port="$3"

	if [ "${proto}" = "https" ] && [ "${port}" -eq 443 ] || [ "${proto}" = "http" ] && [ "${port}" -eq 80 ]; then
		append_origin "${proto}://${host}"
	else
		append_origin "${proto}://${host}:${port}"
	fi
}

validate_owsd_iface() {
	uci_validate_section "owsd" "owsd-listen" "$1" \
		'port:port' \
		'interface:network' \
		'origin:list(string)' \
		'whitelist_interface_as_origin:bool:0' \
		'whitelist_dhcp_domains:bool:0' \
		'ipv6:bool:1' \
		'ipv6only:bool:0' \
		'cert:file' \
		'key:file' \
		&&
	[ -n "${port}" ]
}

parse_owsd_iface() {
	local port interface whitelist_interface_as_origin whitelist_dhcp_domains ipv6 ipv6only cert key

	validate_owsd_iface "$1" || {
		echo "Validation failed"
		return 1
	}

	# utility function
	new_listen_socket() {
		procd_append_param command -p "${port}"

		procd_append_param command -L"$1"

		[ -n "${cert}"      ] && procd_append_param command -c"${cert}"
		[ -n "${key}"       ] && procd_append_param command -k"${key}"

		[ -n "$2" ] && procd_append_param command -i"$2"
	}

	append_whitelists () {
		config_list_foreach "$1" "origin" append_origin

		if [ "$whitelist_dhcp_domains" == "1" ]; then
			for domain in $DHCP_DOMAINS; do
				append_origin_parts "${http}" "${domain}" "${port}"
			done
		fi

		if [ -n "${interface}" -a -n "${addr}" -a "${whitelist_interface_as_origin}" -eq 1 ]; then
			append_origin_parts "${http}" "${addr}" "${port}"
		fi
	}

	local http="http${cert:+s}"
	local ip4addrs ip6addrs

	# bind to some network
	if [ -n "${interface}" ]; then
		# 1 listen-socket (vhost) for each IP address on that network's iface

		# ipv4 addresses
		if [ "${ipv6only}" -eq 0 ]; then
			network_get_ipaddrs ip4addrs "${interface}";
		fi
		for addr in ${ip4addrs}; do
			new_listen_socket "$1" "${addr}"
			append_whitelists "$1"
		done

		# ipv6 addresses
		if [ "${ipv6}" -eq 1 ]; then
			network_get_ipaddrs6 ip6addrs "${interface}"
		fi
		for addr in ${ip6addrs}; do
			new_listen_socket "$1" "${addr}"
			addr="\\[${addr}]"
			append_whitelists "$1"
			procd_append_param command -66
		done
	else
		new_listen_socket "$1"
		if [ "${ipv6}" -eq 1 ]; then procd_append_param command -6; fi
		if [ "${ipv6}" -eq 1 -a "${ipv6only}" -eq 1 ]; then procd_append_param command -6; fi

		append_whitelists "$1"
	fi
}

start_service() {

	# preload dhcp domains list, in case any interface config requires it
	load_dhcp_domains

	config_load owsd # note: do not overload a config while parsing it
	procd_open_instance
	procd_set_param command $PROG

	local sock www redirect

	validate_owsd || {
		echo "Global validation failed"
		return 1
	}

	[ -n "${sock}"      ] && procd_append_param command -s"${sock}"
	[ -n "${www}"       ] && procd_append_param command -w"${www}"
	[ -n "${redirect}"  ] && procd_append_param command -r"${redirect}"

	config_foreach parse_owsd_iface "owsd-listen"

#	procd_set_param stderr 1
	procd_set_param respawn

	procd_close_instance
}

stop_service()
{
	service_stop ${PROG}
}

reload_service() {
        stop
        start
}

service_triggers() {
        procd_add_reload_trigger owsd
}