Node.js UDP/DataGram module provides an implementation of UDP datagram sockets.
Example:
// Importing dgram module
const dgram = require('dgram');
// Creating and initializing client
// and server socket
const client = dgram.createSocket("udp4");
const server = dgram.createSocket("udp4");
// Catching the message event
server.on("message", function (msg) {
// Displaying the client message
process.stdout.write("UDP String: " + msg + "\n");
// Exiting process
process.exit();
})
.bind(1234, () => {
// Adding a multicast address for
// others to join
server.addMembership('224.0.0.114');
});
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");
Output:
UDP String: Hello
The Complete List of UDP/Datagram is listed below:
Class: dgram.Socket
Class: dgram.Socket Methods | Description |
|---|---|
| address() | Get the object which contains the address information for the socket. |
| addMembership() | Make the kernel join a multicast group at the particular multicast address. |
| bind() | Bind the particular data gram server to a particular port with some required information. |
| connect() | Connect the particular server to a particular port and address. |
| dropMembership() | Make the kernel leave a multicast group at the particular multicast address. |
| getSendBufferSize() | Get the size of the socket sends the buffer in bytes. |
| getRecvBufferSize() | Get the size of the socket receives buffer in bytes. |
| setTTL() | Set or clear the IP_TTL socket option which helps to specify how many numbers |
| setMulticastTTL() | Set or clear the IP_MULTICAST_TTL socket option which helps to specify how many numbers |
| unref() | Allow the process to exit even if the socket is still listening. |
| setMulticastInterface() | Set the default ongoing multicast interface into the socket. |
| setMulticastLoopback() | Set or clear the IP_MULTICAST_LOOP socket |
| setBroadcast() | Set or clear the SO_BROADCAST socket |
| setSendBufferSize() | Set the size of the socket sends buffer in bytes. |
| send() | Send the message from one socket to another socket. |
| remoteAddress() | The remote address of the server contains the port, address, and family. |
| ref() | Get the reference of the particular socket containing all the information in it. |
| setRecvBufferSize() | Set the size of the socket receives buffer in bytes. |
| createSocket() | Create the dgram.socket object. |
