I'd like to port simple C++ echo server to C#

Question

SOCKET  client = accept(listen_sock, 0, 0);

timeval client_to;
client_to.tv_sec    = 1;
client_to.tv_usec   = 0;
setsockopt(client, SOL_SOCKET, SO_RCVTIMEO, (char*)&client_to, sizeof(client_to));
char    buffer[1024];
while ((ret = recv(client, buffer, 1024, 0)) != 0)
{
    cout << "<in loop>" << endl;
    if (ret == -1 && WSAGetLastError() != WSAETIMEDOUT) break;
    if (ret > 0) cout << std::string(buffer, 0, ret) << endl;
}

closesocket(client);

Above code is a part of simple echo server written in C++. The problems what I'm facing are...

1. How to set timeout value and detect timeout time is expired?
2. How to detect disconnection of the socket?

Please let me show some code in C#. Thanks.

added >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Part of my C# code is follow...

try
{
    // Read all
    spider.Client.ReceiveTimeout = 500; // spider is TcpClient type and blocking socket.
    int readCount = 0;
    SocketError socketError;
    while ((readCount = spider.Client.Receive(tempBuffer, 0, tempBuffer.Length, SocketFlags.None, out socketError)) > 0) // I  think time-out does not work, Receive() returns immediately.
    {
    recvBuffer.Append(tempBuffer, 0, readCount);
    }
}
catch (Exception e) // even though spider is disconnect, no exception occurred. how can I detect disconnection?
{
    Console.WriteLine("Exception: {0}", e.Message);

}

Answer 1

Hi,

Check out XF.Server socket library by kodart for .net. When you download the library it comes with an echo server as example implementation of Xf.Server library. This will work for you.

www.kodart.com

Thanks.