Forward DHCP events from isc-dhcp-server server

dhcpd.conf

# Add the following snippet to your dhcpd.conf

commit {
  set ClientName = pick-first-value(option fqdn.hostname, option host-name);
  set ClientIp = binary-to-ascii(10, 8, ".", leased-address);
  set ClientMac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6));
  execute("forward_dhcp_events.py", "commit", ClientName, ClientIp, ClientMac); 
}

on release {
  set ClientName = pick-first-value(option fqdn.hostname, option host-name);
  set ClientIp = binary-to-ascii(10, 8, ".", leased-address);
  set ClientMac = binary-to-ascii(16, 8, ":", substring(hardware, 1, 6));
  execute("forward_dhcp_events.py", "release", ClientName, ClientIp, ClientMac); 
}

forward_dhcp_events.py

#!/usr/bin/env python

import socket
import json
import os
import sys

UDP_IP = "127.0.0.1"
UDP_PORT = 1234

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

message = {
    "type": "DHCPServer",
    "action": sys.argv[1],
    "name": sys.argv[2],
    "ip": sys.argv[3],
    "mac": sys.argv[4]
}
sock.sendto(json.dumps(message) + "\n", (UDP_IP, UDP_PORT))