在套接字上指定源端口和目标端口 [英] specifying source and destination port on socket

问题描述

我正在为 TCP 通信创建一个套接字，并想知道如何指定源端口.

I am creating a socket for TCP communication and would like to know how to specify a source port.

Socket socket = new Socket();
socket.connect(dstAddress);

推荐答案

创建新的socket后，用你想要使用的本地端口号调用bind()，然后连接到远程主机.

After creating your new socket, call bind() with the local port number you want to use, then connect to the remote host.

@EJP 是正确的，不过.不要轻易执行此操作，因为如果其他东西碰巧正在使用该端口，或者即使您的程序最近使用了它并关闭了它，您最终可能无法创建套接字.

@EJP is correct, though. Don't do this lightly since you can end up not being able to create the socket if something else happens to be using that port or even if your program has recently used it and closed it.

如果它不起作用，您可能需要查看您正在使用的库.

If it's not working, you may need to look at the library you're using.

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