ASR_BASE
Change-Id: Icf3719cc0afe3eeb3edc7fa80a2eb5199ca9dda1
diff --git a/package/network/utils/wireguard-tools/files/wireguard.sh b/package/network/utils/wireguard-tools/files/wireguard.sh
new file mode 100644
index 0000000..f6ad967
--- /dev/null
+++ b/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
+}
diff --git a/package/network/utils/wireguard-tools/files/wireguard_watchdog b/package/network/utils/wireguard-tools/files/wireguard_watchdog
new file mode 100644
index 0000000..fc90f4a
--- /dev/null
+++ b/package/network/utils/wireguard-tools/files/wireguard_watchdog
@@ -0,0 +1,68 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0
+#
+# Copyright (C) 2018 Aleksandr V. Piskunov <aleksandr.v.piskunov@gmail.com>.
+# Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
+#
+# This watchdog script tries to re-resolve hostnames for inactive WireGuard peers.
+# Use it for peers with a frequently changing dynamic IP.
+# persistent_keepalive must be set, recommended value is 25 seconds.
+#
+# Run this script from cron every minute:
+# echo '* * * * * /usr/bin/wireguard_watchdog' >> /etc/crontabs/root
+
+
+. /lib/functions.sh
+
+check_peer_activity() {
+ local cfg=$1
+ local iface=$2
+ local disabled
+ local public_key
+ local endpoint_host
+ local endpoint_port
+ local persistent_keepalive
+ local last_handshake
+ local idle_seconds
+
+ config_get_bool disabled "${cfg}" "disabled" 0
+ config_get public_key "${cfg}" "public_key"
+ config_get endpoint_host "${cfg}" "endpoint_host"
+ config_get endpoint_port "${cfg}" "endpoint_port"
+
+ if [ "${disabled}" -eq 1 ]; then
+ # skip disabled peers
+ return 0
+ fi
+
+ persistent_keepalive=$(wg show ${iface} persistent-keepalive | grep ${public_key} | awk '{print $2}')
+
+ # only process peers with endpoints and keepalive set
+ [ -z ${endpoint_host} ] && return 0;
+ [ -z ${persistent_keepalive} -o ${persistent_keepalive} = "off" ] && return 0;
+
+ # skip IP addresses
+ # check taken from packages/net/ddns-scripts/files/dynamic_dns_functions.sh
+ local IPV4_REGEX="[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}\.[0-9]\{1,3\}"
+ 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,\}\)"
+ local IPV4=$(echo ${endpoint_host} | grep -m 1 -o "$IPV4_REGEX$") # do not detect ip in 0.0.0.0.example.com
+ local IPV6=$(echo ${endpoint_host} | grep -m 1 -o "$IPV6_REGEX")
+ [ -n "${IPV4}" -o -n "${IPV6}" ] && return 0;
+
+ # re-resolve endpoint hostname if not responding for too long
+ last_handshake=$(wg show ${iface} latest-handshakes | grep ${public_key} | awk '{print $2}')
+ [ -z ${last_handshake} ] && return 0;
+ idle_seconds=$(($(date +%s)-${last_handshake}))
+ [ ${idle_seconds} -lt 150 ] && return 0;
+ logger -t "wireguard_monitor" "${iface} endpoint ${endpoint_host}:${endpoint_port} is not responding for ${idle_seconds} seconds, trying to re-resolve hostname"
+ wg set ${iface} peer ${public_key} endpoint "${endpoint_host}:${endpoint_port}"
+}
+
+# query ubus for all active wireguard interfaces
+eval $(ubus -S call network.interface dump | jsonfilter -e 'wg_ifaces=@.interface[@.up=true && @.proto="wireguard"].interface')
+
+# check every peer in every active wireguard interface
+config_load network
+for iface in $wg_ifaces; do
+ config_foreach check_peer_activity "wireguard_${iface}" "${iface}"
+done