dgram.createSocket(options[, callback])
options<Object> 可用选项有:type<string> 套接字的类型。必须是'udp4'或'udp6'。必填。reuseAddr<boolean> 当设置为true时,即使另一个进程已经绑定了该地址,socket.bind()仍会重用该地址。默认值:false。ipv6Only<boolean> 将ipv6Only设置为true将禁用双栈支持,即绑定到地址::不会导致0.0.0.0被绑定。默认值:false。recvBufferSize<number> 设置SO_RCVBUF套接字值。sendBufferSize<number> 设置SO_SNDBUF套接字值。lookup<Function> 自定义查找函数。默认值:dns.lookup()。signal<AbortSignal> 一个可用于关闭套接字的 AbortSignal。
callback<Function> 作为'message'事件的监听器附加。可选。- 返回: <dgram.Socket>
创建一个 dgram.Socket 对象。一旦创建了套接字,调用 socket.bind() 将指示套接字开始监听数据报消息。当 address 和 port 没有传给 socket.bind() 时,该方法会将套接字绑定到“所有接口”地址的随机端口(对于 udp4 和 udp6 套接字都能正确处理)。绑定的地址和端口可以通过 socket.address().address 和 socket.address().port 获取。
🌐 Creates a dgram.Socket object. Once the socket is created, calling
socket.bind() will instruct the socket to begin listening for datagram
messages. When address and port are not passed to socket.bind() the
method will bind the socket to the "all interfaces" address on a random port
(it does the right thing for both udp4 and udp6 sockets). The bound address
and port can be retrieved using socket.address().address and
socket.address().port.
如果启用了 signal 选项,对相应的 AbortController 调用 .abort() 类似于对套接字调用 .close():
🌐 If the signal option is enabled, calling .abort() on the corresponding
AbortController is similar to calling .close() on the socket:
const controller = new AbortController();
const { signal } = controller;
const server = dgram.createSocket({ type: 'udp4', signal });
server.on('message', (msg, rinfo) => {
console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
});
// Later, when you want to close the server.
controller.abort();