TCPServerExample

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    // C++ Source Code File Name: server.cpp
    // C++ Compiler Used: MSVC, BCC32, GCC, HPUX aCC, SOLARIS CC
    // Produced By: DataReel Software Development Team
    // File Creation Date: 09/20/1999
    // Date Last Modified: 06/17/2016
    // Copyright (c) 2001-2016 DataReel Software Development
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    // ------------- Program Description and Details ------------- //
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    /*
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
    USA

    Simple stream server demo using the gxSocket class.
    */
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    #include "gxdlcode.h"

    #if defined (__USE_ANSI_CPP__) // Use the ANSI Standard C++ library
    #include <iostream>
    using namespace std; // Use unqualified names for Standard C++ library
    #else // Use the old iostream library by default
    #include <iostream.h>
    #endif // __USE_ANSI_CPP__

    #include <string.h>
    #include <stdlib.h>
    #include "gxsocket.h"

    #if defined (__LINUX__)
    #include <sys/signal.h>
    #endif

    int main(int argc, char **argv)
    {
    #if defined (__LINUX__)
      // NOTE: Linux will kill a process that attempts to write to a pipe
      // with no readers. If this application may send data to a client socket
      // that has disconnected tell the kernel to ignore the broken pipe.
      signal(SIGPIPE, SIG_IGN);
    #endif

      // Check arguments. Should be only one: the port number to bind to.
      if(argc != 2) {
        cerr << "Usage: " << argv[0] << " port" << "\n" << flush;
        return 1;
      }

      unsigned short port = (unsigned short) atoi(argv[1]);

      cout << "Constructing a stream server" << "\n" << flush;
      gxSocket server(SOCK_STREAM, port);
      if(!server) {
        cout << server.SocketExceptionMessage() << "\n" << flush;
        return 1;
      }

      // Get the host name assigned to this machine (statistical info only)
      char hostname[gxsMAX_NAME_LEN];
      int rv = server.GetHostName(hostname);
      if(rv < 0) {
        cout << server.SocketExceptionMessage() << "\n" << flush;
        return 1;
      }

      cout << "Opening stream server on host " << hostname << "\n" << flush;
      cout << "Listening on port " << port << "\n" << flush;

      // Bind the name to the socket
      rv = server.Bind();
      if(rv < 0) {
        cout << server.SocketExceptionMessage() << "\n" << flush;
        return 1;
      }

      // Listen for connections
      rv = server.Listen();
      if(rv < 0) {
        cout << server.SocketExceptionMessage() << "\n" << flush;
        return 1;
      }

      // Accept a connection and block execution until data is
      // received from a client connection to this port.
      rv = server.Accept();
      if(rv < 0) {
        cout << server.SocketExceptionMessage() << "\n" << flush;
        return 1;
      }

      // Get the client info (statistical info only)
      char client_name[gxsMAX_NAME_LEN]; int r_port = -1;
      server.GetClientInfo(client_name, r_port);
      cout << "Receiving data from " << client_name
           << " remote port " << r_port << "\n" << flush;

      const int buf_len = 255; // Receive buffer size
      char sbuf[buf_len];
      // Block until the client sends some data
      rv = server.RawRemoteRead(sbuf, buf_len);
      if(rv < 0) {
        cout << server.SocketExceptionMessage() << "\n" << flush;
        return 1;
      }

      cout << "Received " << rv << " bytes" << "\n" << flush;

      // Print the buffer contents to the stdout for visual conformation
      sbuf[rv] = 0; // Null terminate the buffer
      cout << sbuf;

      cout << "Exiting..." << "\n" << flush;
      server.Close(); // Close the socket connection
      server.ReleaseSocketLibrary();
      return 0;
    }
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