A wrapper for the wireguard command to display the hostname of endpoints from local DNS.

wg.sh

#!/bin/bash
WG=/usr/bin/wg
WGCONF=/etc/wireguard/wg0.conf # The line prior to AllowedIPs in each [Peer] should be # Name = Xyz
OUTPUT=$(script --flush --quiet /dev/null --command $WG)
if [[ $# -gt 0 ]]; then
        $WG $@
        exit
fi

if [[ ! -z $OUTPUT ]]; then
        while read LINE; do
                if [[ $LINE =~ ^.*(peer|interface) ]]; then
                        echo "$LINE"
                elif [[ $LINE =~ ^.*allowed.* ]]; then
                        IPV4=$(printf "%q" "$LINE" | cut -d' ' -f3 | cut -d/ -f1 | cut -d\\ -f1)
                        #HOST=$(host "$IPV4" | cut -d' ' -f5 | cut -d. -f1)
                        HOST=$(grep -B1 "$IPV4" "$WGCONF" | grep 'Name' | cut -d' ' -f4)
                        echo "  $LINE"
                        echo "  friendly name: $HOST"
                else
                        echo "  $LINE"
                fi
        done <<< "$OUTPUT"
fi