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