The socket.setMulticastInterface() method is an inbuilt application programming interface of class Socket within dgram module which is used to set the default ongoing multicast interface into the socket.
Syntax:
const socket.setMulticastInterface( multicastInterface )
Parameters: This method takes the string representing the multicast interface as a parameter.
Return Value: This method does not return any value.
Example 1: In this example, we will see the use of socket.setMulticastInterface() Method
Filename: index.js
// Node.js program to demonstrate the
// socket.setMulticastInterface() method
// Importing dgram module
const dgram = require('dgram');
// Creating and initializing client
// and server socket
let client = dgram.createSocket("udp4");
let 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, () => {
// Setting multicast interface in the socket
server.setMulticastInterface('::%eth1');
});
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");
Output:
UDP String: Hello
Example 2: In this example, we will see the use of a socket.setMulticastInterface() Method
Filename: index.js
// Node.js program to demonstrate the
// socket.setMulticastInterface() method
// Importing dgram module
const dgram = require('dgram');
// Creating and initializing client
// and server socket
let client = dgram.createSocket("udp4");
let 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();
});
// Catching the listening event
server.on('listening', () => {
const address = server.address();
console.log(`server listening
${address.address}:${address.port}`);
});
// Binding server with port address
server.bind(1234, () => {
// Setting multicast interface in the socket
// by using setMulticastInterface() method
server.setMulticastInterface('::%eth1');
});
// Client sending message to server
client.send("Hello", 0, 7, 1234, "localhost");
Output:
server listening 0.0.0.0:1234 UDP String: Hello
Run the index.js file using the following command:
node index.js
