Udp data 주고 받기 Ex

 

import dgram from 'node:dgram';

//https://nodejs.org/api/dgram.html

const server = dgram.createSocket('udp4');

server.on('error', (err) => {
  console.log(`server error:\n${err.stack}`);
  server.close();
});

server.on('message', (msg, rinfo) => {
  console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
});

server.on('listening', () => {
  const address = server.address();
  console.log(`server listening ${address.address}:${address.port}`);
});

server.bind(41234);
// Prints: server listening 0.0.0.0:41234

(async()=> {
	console.log("== async start ==");
	//await delay(1000);
	await new Promise(resolve => setTimeout(resolve, 1000));

	let sendmsg1 = "message test1";
	console.log("send msg: " + sendmsg1);
	const client = dgram.createSocket('udp4');
	client.send(sendmsg1, 41234, 'localhost', (err) => {
		client.close();
	});
	
	console.log("== async end ==");
})();

 

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