mirror of
https://github.com/Slava-Shchipunov/awg-openwrt.git
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bad6a2005d
* feat: update awg tools * feat: update kmod-awg * feat: update luci awg * feat: update build-module.yml * feat: update amneziawg-install.sh * feat: update README.md * fix: fix paths * fix: fix adding packages * fix: fix regexp * fix: fix feeds install * chore: disable run-release.yml * feat: add rus lang package * fix: install python3-pyelftools in build job * feat: add manual start for build * chore: remove build to all snapshots
71 lines
2.8 KiB
Bash
Executable File
71 lines
2.8 KiB
Bash
Executable File
#!/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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# shellcheck disable=SC1091,SC3043
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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="$2"
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local disabled
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local public_key
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local endpoint_host
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local endpoint_port
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local persistent_keepalive
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local last_handshake
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local idle_seconds
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config_get_bool disabled "${cfg}" "disabled" 0
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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 "${cfg}" "endpoint_port"
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if [ "${disabled}" -eq 1 ]; then
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# skip disabled peers
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return 0
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fi
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persistent_keepalive=$(awg show "${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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if [ -z "${persistent_keepalive}" ] || [ "${persistent_keepalive}" = "off" ]; then return 0; fi
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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 IPV6
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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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IPV6="$(echo "${endpoint_host}" | grep -m 1 -o "$IPV6_REGEX")"
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[ -n "${IPV4}${IPV6}" ] && return 0;
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# re-resolve endpoint hostname if not responding for too long
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last_handshake=$(awg 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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[ ${idle_seconds} -lt 150 ] && return 0;
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logger -t "amneziawg_monitor" "${iface} endpoint ${endpoint_host}:${endpoint_port} is not responding for ${idle_seconds} seconds, trying to re-resolve hostname"
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awg set "${iface}" peer "${public_key}" endpoint "${endpoint_host}:${endpoint_port}"
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}
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# query ubus for all active wireguard interfaces
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awg_ifaces=$(ubus -S call network.interface dump | jsonfilter -e '@.interface[@.up=true]' | jsonfilter -a -e '@[@.proto="amneziawg"].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 $awg_ifaces; do
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config_foreach check_peer_activity "amneziawg_${iface}" "${iface}"
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done
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