dgram.createSocket(type[, callback])


创建一个特定 typedgram.Socket 对象。

一旦套接字被创建,调用 socket.bind() 会指示套接字开始监听数据报消息。 如果 addressport 没传给 socket.bind(),那么这个方法会把这个套接字绑定到 "全部接口" 地址的一个随机端口(这适用于 udp4udp6 套接字)。 绑定的地址和端口可以通过 socket.address().addresssocket.address().port 来获取。

Creates a dgram.Socket object of the specified type.

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.