#!/bin/sh

die()
{
	echo "$1" >&2
	exit "${2:-1}"
}

[ -n "$FAKE_LVS_STATE_DIR" ] || die "FAKE_LVS_STATE_DIR not set"

service_address=""
scheduling_method="wlc"
persistent_timeout=""
real_server=""
forwarding_method="Route"

set_service_address()
{
	[ -z "$service_address" ] ||
		die "multiple 'service-address' options specified" 2
	case "$2" in
	*:*) service_address="${1}  ${2}" ;;
	*) service_address="${1}  ${2}:0" ;;
	esac
}

set_real_server()
{
	[ -z "$real_server" ] ||
		die "multiple 'real-server' options specified" 2
	case "$1" in
	*\]:*) real_server="${1}" ;;
	*\]) real_server="${1}:0" ;;
	*:*) real_server="${1}" ;;
	*) real_server="${1}:0" ;;
	esac

	case "$real_server" in
	127.0.0.1:* | \[::1\]:*) forwarding_method="Local" ;;
	esac
}

case "$1" in
-A)
	shift
	while [ -n "$1" ]; do
		case "$1" in
		-t)
			set_service_address "TCP" "$2"
			shift 2
			;;
		-u)
			set_service_address "UDP" "$2"
			shift 2
			;;
		-s)
			scheduling_method="$2"
			shift 2
			;;
		-p)
			persistent_timeout="persistent $2"
			shift 2
			;;
		*) die "Unsupported -A option $1" ;;
		esac
	done
	[ -n "$service_address" ] ||
		die "You need to supply the 'service-address' option for the 'add-service' command" 2
	d="${FAKE_LVS_STATE_DIR}/${service_address}"
	mkdir "$d" 2>/dev/null || die "Service already exists" 255
	t="${scheduling_method}${persistent_timeout:+ }${persistent_timeout}"
	echo "$t" >"${d}/.info"
	;;
-D)
	shift
	while [ -n "$1" ]; do
		case "$1" in
		-t)
			set_service_address "TCP" "$2"
			shift 2
			;;
		-u)
			set_service_address "UDP" "$2"
			shift 2
			;;
		*) die "Unsupported -D option $1" ;;
		esac
	done
	[ -n "$service_address" ] ||
		die "You need to supply the 'service-address' option for the 'delete-service' command" 2
	d="${FAKE_LVS_STATE_DIR}/${service_address}"
	rm -f "${d}/"*
	rm -f "${d}/.info"
	rmdir "$d" 2>/dev/null || die "No such service" 255
	;;
-a)
	shift
	while [ -n "$1" ]; do
		case "$1" in
		-t)
			set_service_address "TCP" "$2"
			shift 2
			;;
		-u)
			set_service_address "UDP" "$2"
			shift 2
			;;
		-r)
			set_real_server "$2"
			shift 2
			;;
		-g)
			forwarding_method="Route"
			shift 1
			;;
		*) die "Unsupported -A option $1" ;;
		esac
	done
	[ -n "$service_address" ] ||
		die "You need to supply the 'service-address' option for the 'delete-service' command" 2
	d="${FAKE_LVS_STATE_DIR}/${service_address}"
	[ -d "$d" ] || die "Service not defined" 255
	[ -n "$real_server" ] ||
		die "You need to supply the 'real-server' option for the 'add-server' command" 2
	f="${d}/${real_server}"
	echo "$forwarding_method" >"$f"
	;;
-l)
	cat <<EOF
IP Virtual Server version 1.2.1 (size=4096)
Prot LocalAddress:Port Scheduler Flags
  -> RemoteAddress:Port           Forward Weight ActiveConn InActConn
EOF
	cd "$FAKE_LVS_STATE_DIR" || exit 0
	(
		for d in *; do
			[ -d "$d" ] || continue
			printf '%s ' "$d"
			cat "${d}/.info"
			for f in "${d}/"*; do
				[ -f "$f" ] || continue
				read -r forwarding_method <"$f"
				printf "  -> %-28s %-7s %-6s %-10s %-10s\n" \
					"${f##*/}" "$forwarding_method" 1 0 0
			done
		done
	)
	;;
*)
	die "Unknown option $1"
	;;
esac

exit 0