Created
May 25, 2024 03:23
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A watchdog for running the Phantun client and WireGuard in OpenWrt
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| #!/bin/sh | |
| # SPDX-License-Identifier: GPL-2.0 | |
| # | |
| WAIT_DURATION=300 | |
| . /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 | |
| # 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})) | |
| [ ${idle_seconds} -lt 300 ] && return 0; | |
| /etc/init.d/phantun restart | |
| } | |
| while true; do | |
| # query ubus for all active wireguard interfaces | |
| wg_ifaces=$(ubus -S call network.interface dump | jsonfilter -e '@.interface[@.up=true]' | jsonfilter -a -e '@[@.proto="wireguard"].interface' | tr "\n" " ") | |
| config_load network | |
| for iface in $wg_ifaces; do | |
| config_foreach check_peer_activity "wireguard_${iface}" "${iface}" | |
| done | |
| sleep $WAIT_DURATION | |
| done | |
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