ll_client.cpp

Conexus::LL::Packet link layer client example

/***************************************************************************
 *   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 <iostream>

using namespace Conexus;
using namespace std;

typedef struct datagram {
  uint8_t ihl:4;
  uint8_t version:4;
  uint8_t tos;
  uint16_t tl;
  uint16_t id;
  uint16_t fo;
  uint8_t ttl;
  uint8_t protocol;
  uint16_t checksum;
  uint32_t source;
  uint32_t destination;
  uint8_t data[64];
} datagram;

int main(int argc, char* argv[]) {
  Conexus::init();

  LL::Packet::pointer packet = LL::Packet::create();
  LL::Address lladdr;
  IPv4::Address source, dest;

  vector<string> ifnames = Network::interface_names();
  for (vector<string>::iterator i = ifnames.begin(); i != ifnames.end(); i++)
    cout << *i << " : " << Network::interface_index(*i) << endl;

  lladdr.set_interface("eth0");

  datagram dg;
  source.set_host("192.168.10.11");
  dest.set_host("192.168.10.12");
  dg.version = 4;
  dg.ihl = 5;
  dg.tos = 0;
  dg.tl = htons(sizeof(datagram));
  dg.fo = htons(2<<13);
  dg.ttl = 42;
  dg.protocol = 1;
  dg.checksum = htons(0xbb75);
  dg.source = htonl(source.host());
  dg.destination = htonl(dest.host());
  dg.data[0] = 0x08; // ICMP ping request
  dg.data[1] = 0x00; // ICMP code
  dg.data[2] = 0x38; dg.data[3] = 0x9b; // ICMP checksum
  dg.data[4] = 0x42; dg.data[5] = 0x53; // ICMP identifier
  dg.data[6] = 0x00; dg.data[7] = 0x01; // ICMP sequence

  uint8_t data[] = {0x45, 0x00, 0x00, 0x27, 0x00, 0x00, 0x40, 0x00, 0x40, 0x11, 0x24, 0xb5, 0x0a, 0x08, 0x01, 0x01, 0x0a, 0x08, 0x01, 0x01, 0x80, 0x40, 0x05, 0xdc, 0x00, 0x13, 0x5e, 0x90, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x00};


  Conexus::Data d = Conexus::Data( &dg, sizeof(datagram) );
  packet->writeto(lladdr, d);
  packet->set_interface(1);
  packet->write(data, sizeof(data));

  return 0;
}