Re: UDP Broadcast message when system has more than one network card
"amccombs" <email@example.com> wrote in message
I have an application that broadcast a UDP pack to all devices for reply.
When a system has more than one network card it seems to only broadcast it
only on the first card that was installed in the machine. How do I get it
broadcast on all network devices on my system?
I am using,
BOOL bMultipleApps = TRUE;
SetSockOpt(SO_REUSEADDR, (void*)&bMultipleApps, sizeof(BOOL), SOL_SOCKET);
SetSockOpt(SO_BROADCAST, (void*)&bMultipleApps, sizeof(BOOL), SOL_SOCKET);
SendTo(pBuffer, nSize, nPort, NULL, MSG_DONTROUTE);
Have you tried using bind() to bind your socket to the address of a specific
adapter (instead of INADDR_ANY)?
GetAdaptersInfo()/GetAdaptersAddresses() can help to enumerate the available
adapters and their associated addresses.
A search on "multihomed host socket" yields a lot of info :)
Microsoft MVP - Visual C++
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