Bash script to list stats for connected WireGuard clients

wgstats.sh

#!/bin/bash

# Human readable statistics for connected WireGuard clients
#
# Source: https://gist.github.com/fvdm/cb5b90541b076914ee897d048cd4f549
#
# This script is following the 'wireguard-manager' storage
# Filenames: [wg_iface]-client-[name].conf
#
# Set 'wg_clients' to the path where client configs are saved
# Set 'wg_iface' to the WireGuard network interface
# or provide it in the first argument

wg_clients="/root/wireguard/clients/"
wg_iface="wg0"


if [ "$1" != "" ]; then
	wg_iface=$1
fi

declare -g sumrx=0
declare -g sumtx=0

function human () {
	echo -e "$1" \
	| numfmt --to=iec --padding=4 \
	| sed -r 's/([0-9.]+)([A-Z])$/\\e[0;1m\1\\e[93m\2\\e[0m/'
}

echo -e "\e[93;1m"
echo "Latest handshake       RX    TX  Client name      Endpoint"
echo "-------------------  ----  ----  ---------------  --------"
echo -ne "\e[0;0m"

while read line; do
	ips=$(echo -e "$line" | cut -f4)

	name=$( \
		sudo find $wg_clients \
		-name $wg_iface'-*.conf' \
		-exec grep -l "$ips" {} \; \
		| sed -r 's/.+\/'$wg_iface'-client-//' \
		| sed -r 's/\.conf$//' \
	)
	name=$(printf "%-15s" $name)

	endpoint=$(echo -e "$line" | cut -f3 | sed -r 's/:[0-9]+$//')
	latest=$(echo -e "$line" | cut -f5)
	latest=$(date -d @$latest +'%F %T')

	rx=$(echo -e "$line" | cut -f6)
	sumrx=$(($sumrx+$rx))
	rx=$(human $rx)

	tx=$(echo -e "$line" | cut -f7)
	sumtx=$(($sumtx+$tx))
	tx=$(human $tx)

	echo -e "$latest  $rx  $tx  $name  $endpoint"
done < <( \
	sudo wg show $wg_iface dump \
	| tail -n +2 \
	| grep -v '(none)' \
)

sumrx=$(human $sumrx)
sumtx=$(human $sumtx)

echo -ne "\e[93;1m"
echo -e "                     ----  ----"
echo -e "                     $sumrx  $sumtx"
echo -e "\e[0;0m"