add numbers gestion function

Signed-off-by: GnomeZworc <nicolas.boufidjeline@g3e.fr>

lib/numbers.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+function generate_random_number {
+    local digits="$1"
+    tr -dc '0-9' </dev/urandom | head -c "$digits"
+}
+
+function find_mac {
+    id="${1}"
+    ip="${2}"
+
+    cat "/etc/dnsmasq.d/${id}.conf"  | grep "${ip}" | cut -d, -f 1 | cut -d= -f2
+}