#!/bin/bash
# This script adds an specified tap interface to first bridge
# found with the name containing br0

if [[ $EUID != 0 ]]; then
	echo "This script needs sudo priveleges"
	echo "Exiting..."
	exit 1
fi

for INT in $(ls /sys/class/net); do
    if [[ $INT == *"br0"*  && -d /sys/class/net/$INT/bridge/. ]]; then
        BRIDGE="$INT"
        break
    fi
done

if [[ -z $BRIDGE ]]; then
    echo 'No bridge INTerfaces seen'
    exit 1
fi

/sbin/ip tuntap add dev $1 mode tap
/sbin/ip link set $1 up

/sbin/ip link set dev $1 master $BRIDGE