ipv4_udpposet_server.cpp

This example server demonstrates receiving on three ports using Conexus::IPv4::UDPPoset.

/***************************************************************************
 *   Copyright (C) 2001 by Rick L. Vinyard, Jr.                            *
 *   rvinyard@cs.nmsu.edu                                                  *
 *                                                                         *
 *   This file is part of the conexus library.                             *
 *                                                                         *
 *   The conexus library is free software; you can redistribute it and/or  *
 *   modify it under the terms of the GNU General Public License version 3 *
 *   as published by the Free Software Foundation.                         *
 *                                                                         *
 *   The conexus 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   *
 *   General Public License for more details.                              *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this software. If not see <http://www.gnu.org/licenses/>.  *
 ***************************************************************************/
#include <conexus.h>

#include <sys/types.h>
#include <unistd.h>
#include <iostream>

// prototypes of the three print callback functions
void print_data1(const Conexus::Data d);
void print_data2(const Conexus::Data d);
void print_data3(const Conexus::Data d);

int main() {
  // Initialize the Conexus library
  // This is needed because we will use threaded servers and this
  // will do all the behind the scenes work to initialize pthreads
  Conexus::init();

  // Declare the udp object
  Conexus::IPv4::UDP::pointer udp1 = Conexus::IPv4::UDP::create(1500);
  Conexus::IPv4::UDP::pointer udp2 = Conexus::IPv4::UDP::create(1501);
  Conexus::IPv4::UDP::pointer udp3 = Conexus::IPv4::UDP::create(1502);

  // The server connect method connects a provided sigc++ slot that will be called
  // back when the server receives any data.
  udp1->signal_data().connect(sigc::ptr_fun(&print_data1));
  udp2->signal_data().connect(sigc::ptr_fun(&print_data2));
  udp3->signal_data().connect(sigc::ptr_fun(&print_data3));

  // Start the server. The server will spawn a separate thread to service
  // received data, so this call will immediately return after the thread
  // is spawned.
  udp1->start();
  udp2->start();
  udp3->start();

  std::cout << "Main thread pid: " << pthread_self() << std::endl;
  // Set up a loop that will run for 20 seconds and print the time every 5
  // seconds. Since the server is threaded, the sleep(1) call will not effect
  // the servicing thread.
  std::cout << "Starting..." << std::endl;
  for (int i=1; i <= 20; i++) {
    if (i%5 == 0)
      std::cout << "Time: " << i << std::endl;
    sleep(1);
  }

  // Stop the server and prepare for shutdown
  udp1->stop();
  udp2->stop();
  udp3->stop();

  return 0;
}

// These are the three callback functions. Each simply prints out the data received.

void print_data1(const Conexus::Data d) {
  std::cout << "Responding thread pid: " << pthread_self() << std::endl;
  std::cout << "<1> Received " << d.size() << " bytes of data [" << d.data() << "]\n";
}

void print_data2(const Conexus::Data d) {
  std::cout << "Responding thread pid: " << pthread_self() << std::endl;
  std::cout << "<2> Received " << d.size() << " bytes of data [" << d.data() << "]\n";
}

void print_data3(const Conexus::Data d) {
  std::cout << "Responding thread pid: " << pthread_self() << std::endl;
  std::cout << "<3> Received " << d.size() << " bytes of data [" << d.data() << "]\n";
}