nodejs dgram模块广播+组播的实现示例

const dgram = require('dgram');
const server = dgram.createsocket('udp4');
const multicastaddr = '224.100.100.100';

server.on('close', () => {
 console.log('socket已关闭');
});

server.on('error', (err) => {
 console.log(err);
});

server.on('listening', () => {
 console.log('socket正在监听中...');
 server.addmembership(multicastaddr); // 不写也行
 server.setbroadcast(true);
 server.setmulticastttl(128);
 setinterval(() => {
  sendmsg();
 }, 1500);
});

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

function sendmsg() {
 console.log('sending');
 server.send('大家好啊，我是服务端广播消息', 8061, '10.8.93.255');
 server.send('大家好啊，我是服务端组播消息', 8061, multicastaddr);
}

server.bind('8060'); // 此处填写ip后无法组播

const dgram = require('dgram');
const client = dgram.createsocket('udp4');
const multicastaddr = '224.100.100.100';

client.on('close', () => {
 console.log('socket已关闭');
});

client.on('error', (err) => {
 console.log(err);
});
client.on('listening', () => {
 console.log('socket正在监听中...');
 client.addmembership(multicastaddr);
});
client.on('message', (msg, rinfo) => {
 console.log(`receive server message from ${rinfo.address}:${rinfo.port}：${msg}`);
});
client.bind(8061); // 此处必须绑定自己的局域网ip或者不填，填localhost是不行的