BroadcastServerExample

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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: 10/30/2001
    // Date Last Modified: 06/17/2016
    // Copyright (c) 2001-2016 DataReel Software Development
    // ----------------------------------------------------------- //
    // ------------- Program Description and Details ------------- //
    // ----------------------------------------------------------- //
    /*
    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 broadcast sender demo using the gxSocket class.
    */
    // ----------------------------------------------------------- //
    #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"

    int main(int argc, char **argv)
    {
      // Check arguments. Should be only one: the port number to bind to.
      if(argc != 3) {
        cerr << "Usage: " << argv[0] << " <Broadcast IP> <Broadcast Port>"
    	 << "\n" << flush;
        cerr << "Example: " << argv[0] << " 192.168.0.255 12345" << "\n"
    	 << flush;
        return 1;
      }

      char *broadcast_ip = argv[1];
      unsigned short port = (unsigned short) atoi(argv[2]);
      int rv;

      cout << "Construcing datagram socket..." << "\n" << flush;
      gxSocket server(SOCK_DGRAM, SOCK_DGRAM, IPPROTO_UDP, port, broadcast_ip);
      if(!server) {
        cout << server.SocketExceptionMessage() << "\n" << flush;
        return 1;
      }

      // Set the socket option to allow broadcasting. By default
      // sockets cannot broadcast. NOTE: Local broadcast messages
      // are never forwarded by routers.
      int broadcast_permission = 1;
      rv = server.SetSockOpt(SOL_SOCKET, SO_BROADCAST,
    			 (void *)&broadcast_permission,
    			 sizeof(broadcast_permission));
      if(rv < 0) {
        cout << "Could not set socket with broadcast permission" << "\n" << flush;
        cout <<  server.SocketExceptionMessage() << "\n" << flush;
        return 0;
      }

      cout << "Sending broadcast messages to network " << broadcast_ip << "\n"
           << flush;
      cout << "Sending datagrams on port " << port << "\n" << flush;
      cout << "Press Ctrl-C to exit" << "\n" << flush;

      const char *message = "The quick brown fox jumps over the lazy dog \
    0123456789\n";

      while(1) {
        rv = server.SendTo((char *)message, strlen(message));
        if(rv < 0) {
          cout << server.SocketExceptionMessage() << "\n" << flush;
          break;
        }

        // Set a long delay between messages to avoid flooding the network
    #ifdef __WIN32__
        Sleep(3000); // 3 second delay
    #else
        sleep(3);
    #endif
      }

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