dhcpd.js

dhcpd.js

dhcpd.js is a Node.js implementation of a DHCP server. It provides a simple and efficient way to handle DHCP events in your network.

Installation

You can install dhcpd.js using npm:

npm install dhcpd.js

Monitor Example

const { Server } = require('dhcpd.js');

const s = new Server('192.168.1.1');

s.on("dhcp", (e) => {
  console.log(e.packet.debug());
});

s.bind();

Server Example

const { BOOTMessageType, Server } = require('dhcpd.js');

const s = new Server({
  serverId: "192.168.1.1",
  gateways: ["192.168.1.1"],
  domainServer: ["192.168.1.1"]
});

s.on("listening", () => {
  console.log("Server start", s.address);
});

const ips = {};

s.on("discover", (e) => {
  const { packet } = e;
  console.log(packet.log());

  let ip = "0.0.0.0";
  if (Object.keys(ips).includes(packet.chaddr)) {
    ip = ips[packet.chaddr];
  } else {
    ip = `192.168.1.${Object.keys(ips).length + 2}`;
  }
  ips[packet.chaddr] = ip;

  const offer = s.createOffer(packet);
  offer.yiaddr = ip;

  console.log(offer.log());
  s.send(offer);
});

s.on("request", (e) => {
  const { packet } = e;
  console.log(packet.log());

  const ack = s.createAck(packet);
  ack.yiaddr = ips[packet.chaddr];

  console.log(ack.log());
  s.send(ack);
});

s.on("release", (e) => {
  const { packet } = e;
  console.log(packet.log());
  delete ips[packet.chaddr];
});

s.bind();

RFC

For more information about DHCP, you can refer to the following RFCs:

• Dynamic Host Configuration Protocol
• DHCP Options and BOOTP Vendor Extensions

Related Projects

• dhcpjs
• node-dhcpd
• forge