Initial commit

package/network/utils/wireguard-tools/files/wireguard.sh

@@ -0,0 +1,217 @@
+#!/bin/sh
+# Copyright 2016-2017 Dan Luedtke <mail@danrl.com>
+# Licensed to the public under the Apache License 2.0.
+
+WG=/usr/bin/wg
+if [ ! -x $WG ]; then
+	logger -t "wireguard" "error: missing wireguard-tools (${WG})"
+	exit 0
+fi
+
+[ -n "$INCLUDE_ONLY" ] || {
+	. /lib/functions.sh
+	. ../netifd-proto.sh
+	init_proto "$@"
+}
+
+proto_wireguard_init_config() {
+	proto_config_add_string "private_key"
+	proto_config_add_int "listen_port"
+	proto_config_add_int "mtu"
+	proto_config_add_string "fwmark"
+	available=1
+	no_proto_task=1
+}
+
+proto_wireguard_setup_peer() {
+	local peer_config="$1"
+
+	local disabled
+	local public_key
+	local preshared_key
+	local allowed_ips
+	local route_allowed_ips
+	local endpoint_host
+	local endpoint_port
+	local persistent_keepalive
+
+	config_get_bool disabled "${peer_config}" "disabled" 0
+	config_get public_key "${peer_config}" "public_key"
+	config_get preshared_key "${peer_config}" "preshared_key"
+	config_get allowed_ips "${peer_config}" "allowed_ips"
+	config_get_bool route_allowed_ips "${peer_config}" "route_allowed_ips" 0
+	config_get endpoint_host "${peer_config}" "endpoint_host"
+	config_get endpoint_port "${peer_config}" "endpoint_port"
+	config_get persistent_keepalive "${peer_config}" "persistent_keepalive"
+
+	if [ "${disabled}" -eq 1 ]; then
+		# skip disabled peers
+		return 0
+	fi
+
+	if [ -z "$public_key" ]; then
+		echo "Skipping peer config $peer_config because public key is not defined."
+		return 0
+	fi
+
+	echo "[Peer]" >> "${wg_cfg}"
+	echo "PublicKey=${public_key}" >> "${wg_cfg}"
+	if [ "${preshared_key}" ]; then
+		echo "PresharedKey=${preshared_key}" >> "${wg_cfg}"
+	fi
+	for allowed_ip in $allowed_ips; do
+		echo "AllowedIPs=${allowed_ip}" >> "${wg_cfg}"
+	done
+	if [ "${endpoint_host}" ]; then
+		case "${endpoint_host}" in
+			*:*)
+				endpoint="[${endpoint_host}]"
+				;;
+			*)
+				endpoint="${endpoint_host}"
+				;;
+		esac
+		if [ "${endpoint_port}" ]; then
+			endpoint="${endpoint}:${endpoint_port}"
+		else
+			endpoint="${endpoint}:51820"
+		fi
+		echo "Endpoint=${endpoint}" >> "${wg_cfg}"
+	fi
+	if [ "${persistent_keepalive}" ]; then
+		echo "PersistentKeepalive=${persistent_keepalive}" >> "${wg_cfg}"
+	fi
+
+	if [ ${route_allowed_ips} -ne 0 ]; then
+		for allowed_ip in ${allowed_ips}; do
+			case "${allowed_ip}" in
+				*:*/*)
+					proto_add_ipv6_route "${allowed_ip%%/*}" "${allowed_ip##*/}"
+					;;
+				*.*/*)
+					proto_add_ipv4_route "${allowed_ip%%/*}" "${allowed_ip##*/}"
+					;;
+				*:*)
+					proto_add_ipv6_route "${allowed_ip%%/*}" "128"
+					;;
+				*.*)
+					proto_add_ipv4_route "${allowed_ip%%/*}" "32"
+					;;
+			esac
+		done
+	fi
+}
+
+ensure_key_is_generated() {
+	local private_key
+	private_key="$(uci get network."$1".private_key)"
+
+	if [ "$private_key" == "generate" ]; then
+		local ucitmp
+		oldmask="$(umask)"
+		umask 077
+		ucitmp="$(mktemp -d)"
+		private_key="$("${WG}" genkey)"
+		uci -q -t "$ucitmp" set network."$1".private_key="$private_key" && \
+			uci -q -t "$ucitmp" commit network
+		rm -rf "$ucitmp"
+		umask "$oldmask"
+	fi
+}
+
+proto_wireguard_setup() {
+	local config="$1"
+	local wg_dir="/tmp/wireguard"
+	local wg_cfg="${wg_dir}/${config}"
+
+	local private_key
+	local listen_port
+	local mtu
+
+	ensure_key_is_generated "${config}"
+
+	config_load network
+	config_get private_key "${config}" "private_key"
+	config_get listen_port "${config}" "listen_port"
+	config_get addresses "${config}" "addresses"
+	config_get mtu "${config}" "mtu"
+	config_get fwmark "${config}" "fwmark"
+	config_get ip6prefix "${config}" "ip6prefix"
+	config_get nohostroute "${config}" "nohostroute"
+	config_get tunlink "${config}" "tunlink"
+
+	ip link del dev "${config}" 2>/dev/null
+	ip link add dev "${config}" type wireguard
+
+	if [ "${mtu}" ]; then
+		ip link set mtu "${mtu}" dev "${config}"
+	fi
+
+	proto_init_update "${config}" 1
+
+	umask 077
+	mkdir -p "${wg_dir}"
+	echo "[Interface]" > "${wg_cfg}"
+	echo "PrivateKey=${private_key}" >> "${wg_cfg}"
+	if [ "${listen_port}" ]; then
+		echo "ListenPort=${listen_port}" >> "${wg_cfg}"
+	fi
+	if [ "${fwmark}" ]; then
+		echo "FwMark=${fwmark}" >> "${wg_cfg}"
+	fi
+	config_foreach proto_wireguard_setup_peer "wireguard_${config}"
+
+	# apply configuration file
+	${WG} setconf ${config} "${wg_cfg}"
+	WG_RETURN=$?
+
+	rm -f "${wg_cfg}"
+
+	if [ ${WG_RETURN} -ne 0 ]; then
+		sleep 5
+		proto_setup_failed "${config}"
+		exit 1
+	fi
+
+	for address in ${addresses}; do
+		case "${address}" in
+			*:*/*)
+				proto_add_ipv6_address "${address%%/*}" "${address##*/}"
+				;;
+			*.*/*)
+				proto_add_ipv4_address "${address%%/*}" "${address##*/}"
+				;;
+			*:*)
+				proto_add_ipv6_address "${address%%/*}" "128"
+				;;
+			*.*)
+				proto_add_ipv4_address "${address%%/*}" "32"
+				;;
+		esac
+	done
+
+	for prefix in ${ip6prefix}; do
+		proto_add_ipv6_prefix "$prefix"
+	done
+
+	# endpoint dependency
+	if [ "${nohostroute}" != "1" ]; then
+		wg show "${config}" endpoints | \
+		sed -E 's/\[?([0-9.:a-f]+)\]?:([0-9]+)/\1 \2/' | \
+		while IFS=$'\t ' read -r key address port; do
+			[ -n "${port}" ] || continue
+			proto_add_host_dependency "${config}" "${address}" "${tunlink}"
+		done
+	fi
+
+	proto_send_update "${config}"
+}
+
+proto_wireguard_teardown() {
+	local config="$1"
+	ip link del dev "${config}" >/dev/null 2>&1
+}
+
+[ -n "$INCLUDE_ONLY" ] || {
+	add_protocol wireguard
+}