How do you send and receive UDP packets in Java on a multihomed machine?

StackOverflow https://stackoverflow.com/questions/48659

  •  09-06-2019
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Question

I have a machine with VmWare installed which added two extra network interfaces. The OS is Vista. I have two Java applications, one which broadcasts datagrams, and one which receives those datagrams. The problem I'm having is that unless I disable both VmWare network interfaces, the receiver can't receive the datagrams.

What is the best way to make that work without disabling the interfaces?

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Solution

Look at the alternate constructor for DatagramSocket:

DatagramSocket(int port, InetAddress laddr)
Creates a datagram socket, bound to the specified local address.

I'm guessing you're only specifying the port.

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