#!/bin/bash

function generate_random_id {
    local digits="$1"
    tr -dc '0-9' </dev/urandom | head -c "$digits"
}

function generate_random_number {
    local number=$(shuf -i 10000-20000 -n 1)
    echo "${number}"
}

function find_mac {
    id="${1}"
    ip="${2}"

    cat "/etc/dnsmasq.d/${id}.conf"  | grep ",${ip}$" | cut -d, -f 1 | cut -d= -f2
}