Detecting which networking interface received a UDP multicast packet.

From: MC (anonymous_at_discussions.microsoft.com)
Date: 04/28/04

  • Next message: Greg Kapoustin [MSFT]: "Re: LSP for RPC on XP" 
    Date: Tue, 27 Apr 2004 17:16:05 -0700

    Hi,

    I need to detect which networking interface a UDP multicast packet is being heard over on Win2000 and WinXP.

    So, for example, you have 2 wireless network cards and also a wired interface. We are listening for UDP multicast packets being sent over all of these and need to determine which of these interfaces on which the packet arrived.

    I am trying to use WSARecvMsg() to retrieve the interface on which the packet was received. However, WSARecvMsg() returns SOCKET_ERROR and WSAGetLastError() returns WSAEOPNOTSUPP.

    Can someone explain to me how to setup WSARecvMsg() correctly?

    Thanks,
    MC

  • Next message: Greg Kapoustin [MSFT]: "Re: LSP for RPC on XP"

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