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POHow do I determine which EndPoint caused a SocketException with error code 10054? ("An existing connection was forcibly closed by the remote host.")
 

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  1. POHow do I determine which EndPoint caused a SocketException with error code 10054? ("An existing connection was forcibly closed by the remote host.")
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    <p>To summarize my situation, I am writing a server program that opens a UDP socket with which any number of clients can communicate. I receive UDP packets using code similar to the following:</p> <pre><code>EndPoint sender = new IPEndPoint(IPAddress.Any, 0); try { count = socket.ReceiveFrom(buf, ref sender); // 'count' and 'buf' are defined elsewhere // If an exception isn't thrown, 'sender' will now contain the EndPoint of the client that sent the packet. } catch(SocketException e) { if(e.ErrorCode == 10054) { // How do I get the EndPoint that caused the error? // The 'sender' variable above does not contain the EndPoint. } } </code></pre> <p>I receive error code 10054 ("An existing connection was forcibly closed by the remote host") when my server sends a packet to a client that has closed its own socket. I would like to stop sending packets to that client so that SocketExceptions stop getting thrown, which severely hurts my server's performance.</p> <p>But my problem is that I don't know how to get the EndPoint of the particular client that was forcibly closed. (The 'sender' variable above isn't set to anything useful before the exception is thrown.) How can I find that EndPoint?</p> <p>A less-ideal but still workable solution would be to simply disable the SocketException from being thrown.</p> <p>Any ideas?</p> <p>Thanks!</p>
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