I'm attempting to determine the IP address that is used for broadcasting an
UDP packet. This seemed pretty straightforward but I always get 0.0.0.0
returned for my current IP address. I searched in the mailing list archive
and found this message from Francois :
> Use TWSocket.GetSockName once the connection is established to get both IP
and port
> Use GetXAddr and/or GetXPort to get only IP or port (easier because you
get as a string).
Using GetXAddr is what I did, but for some reason it fails to work and
always returns 0.0.0.0.
MySocket->Proto="udp";
MySocket->Addr="255.255.255.255";
MySocket->LocalPort=5788;
MySocket->Port=5789;
MySocket->Connect();
DEBUG("LocalAddr=>[%s]",MySocket->LocalAddr.c_str());
DEBUG("GetXAddr=>[%s]",MySocket->GetXAddr().c_str());
MySocket->Send(Message.c_str(),Message.Length());
My PC's IP is 10.0.0.39. However, I get following output:
LocalAddr=>[0.0.0.0]
GetXAddr=>[0.0.0.0]
Using WireShark's network capturing I can confirm that the UDP is sent
correctly.
Src: 10.0.0.39 (10.0.0.39), Dst: 255.255.255.255 (255.255.255.255)
User Datagram Protocol, Src Port: 5788 (5788), Dst Port: 5789 (5789)
Can someone help me out with determining the IP address that is used to send
the UDP packet.
Thanks,
Kris
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