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domenico
198
package/network/utils/wireguard-tools/files/wireguard.sh
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198
package/network/utils/wireguard-tools/files/wireguard.sh
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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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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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[ -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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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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proto_wireguard_setup_peer() {
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local peer_config="$1"
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local public_key
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local preshared_key
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local allowed_ips
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local route_allowed_ips
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local endpoint_host
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local endpoint_port
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local persistent_keepalive
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config_get public_key "${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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# 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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# 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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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}/${config}"
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local private_key
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local listen_port
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local mtu
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# load configuration
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config_load network
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config_get private_key "${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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config_get ip6prefix "${config}" "ip6prefix"
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# create interface
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ip link del dev "${config}" 2>/dev/null
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ip link add dev "${config}" type wireguard
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if [ "${mtu}" ]; then
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ip link set mtu "${mtu}" dev "${config}"
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fi
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proto_init_update "${config}" 1
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# generate configuration file
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umask 077
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mkdir -p "${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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# apply configuration file
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${WG} setconf ${config} "${wg_cfg}"
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WG_RETURN=$?
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# delete configuration file
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rm -f "${wg_cfg}"
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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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# 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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# support ip6 prefixes
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for prefix in ${ip6prefix}; do
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proto_add_ipv6_prefix "$prefix"
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done
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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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proto_send_update "${config}"
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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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[ -n "$INCLUDE_ONLY" ] || {
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add_protocol wireguard
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}
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@@ -0,0 +1,60 @@
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#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (C) 2018 Aleksandr V. Piskunov <aleksandr.v.piskunov@gmail.com>.
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# Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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#
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# This watchdog script tries to re-resolve hostnames for inactive WireGuard peers.
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# Use it for peers with a frequently changing dynamic IP.
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# persistent_keepalive must be set, recommended value is 25 seconds.
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#
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# Run this script from cron every minute:
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# echo '* * * * * /usr/bin/wireguard_watchdog' >> /etc/crontabs/root
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. /lib/functions.sh
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check_peer_activity() {
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local cfg=$1
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local iface=$2
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local public_key
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local endpoint_host
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local endpoint_port
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local persistent_keepalive
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local last_handshake
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local idle_seconds
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config_get public_key "${cfg}" "public_key"
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config_get endpoint_host "${cfg}" "endpoint_host"
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config_get endpoint_port "${cfg}" "endpoint_port"
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persistent_keepalive=`wg show ${iface} persistent-keepalive | grep ${public_key} | awk '{print $2}'`
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# only process peers with endpoints and keepalive set
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[ -z ${endpoint_host} ] && return 0;
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[ -z ${persistent_keepalive} -o ${persistent_keepalive} = "off" ] && return 0;
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# skip IP addresses
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# check taken from packages/net/ddns-scripts/files/dynamic_dns_functions.sh
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local IPV4_REGEX="[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}"
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local IPV6_REGEX="\(\([0-9A-Fa-f]\{1,4\}:\)\{1,\}\)\(\([0-9A-Fa-f]\{1,4\}\)\{0,1\}\)\(\(:[0-9A-Fa-f]\{1,4\}\)\{1,\}\)"
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local IPV4=$(echo ${endpoint_host} | grep -m 1 -o "$IPV4_REGEX$") # do not detect ip in 0.0.0.0.example.com
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local IPV6=$(echo ${endpoint_host} | grep -m 1 -o "$IPV6_REGEX")
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[ -n "${IPV4}" -o -n "${IPV6}" ] && return 0;
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# re-resolve endpoint hostname if not responding for too long
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last_handshake=`wg show ${iface} latest-handshakes | grep ${public_key} | awk '{print $2}'`
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[ -z ${last_handshake} ] && return 0;
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idle_seconds=$((`date +%s`-${last_handshake}))
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[ ${idle_seconds} -lt 150 ] && return 0;
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logger -t "wireguard_monitor" "${iface} endpoint ${endpoint_host}:${endpoint_port} is not responding for ${idle_seconds} seconds, trying to re-resolve hostname"
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wg set ${iface} peer ${public_key} endpoint "${endpoint_host}:${endpoint_port}"
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}
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# query ubus for all active wireguard interfaces
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wg_ifaces=`ubus -S call network.interface dump | jsonfilter -e '@.interface[@.up=true]' | jsonfilter -a -e '@[@.proto="wireguard"].interface' | tr "\n" " "`
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# check every peer in every active wireguard interface
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config_load network
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for iface in $wg_ifaces; do
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config_foreach check_peer_activity "wireguard_${iface}" "${iface}"
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done
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