icmp_app.cc

#include <stdlib.h>
#include <iostream>
#include <ctype.h>
#include "minet_socket.h"

void usage()
{
  cerr << "icmp_packet ku atp host\n";
}

int main(int argc, char *argv[])
{
  char buf[512];
  sockaddr_in server_sa, client_sa;
  struct hostent *he;
  int fd;

  if (argc!=4) {
    usage();
    exit(-1);
  }
  
  if (toupper(argv[1][0])=='K') {
    cerr << "Using kernel stack.\n";
    if (minet_init(MINET_KERNEL)<0) { 
      cerr << "Stack initialization failed.\n";
      goto err;
    } else {
      cerr << "Stack initialized.\n";
    }
  } else {
    cerr << "Using Minet User Level Stack.\n";
    if (minet_init(MINET_USER)<0) { 
      cerr << "Stack initialization failed.\n";
      goto err;
    } else {
      cerr << "Stack initialized.\n";
    }
  }

  cerr << "Stack initialized.\n";

  he = gethostbyname(argv[3]);

  if (he==0) { 
    cerr << "Unknown host.\n";
    goto err;
  }
  bzero(&server_sa,sizeof(server_sa));
  server_sa.sin_family=AF_INET;
  memcpy((void*)(&(server_sa.sin_addr)),he->h_addr,he->h_length);
  server_sa.sin_port=htons(atoi(argv[3]));
  
  fd = minet_socket(SOCK_DGRAM);
  
  if (fd<0) { 
    cerr << "Can't create socket.\n";
    minet_perror("reason:");
    goto err;
  } else {
    cerr << "Socket created.\n";
  }

  bzero(&client_sa,sizeof(client_sa));
  client_sa.sin_family=AF_INET;
  client_sa.sin_addr.s_addr=htonl(INADDR_ANY);
  client_sa.sin_port=htons(0);
  
  if (minet_bind(fd,&client_sa)<0) { 
    cerr << "Can't bind socket.\n";
    minet_perror("reason:");
    goto err;
  } else {
    cerr << "Socket bound.\n";
  }

  if (minet_connect(fd,&server_sa)<0) { 
    cerr << "Can't connect socket.\n";
    minet_perror("reason:");
    goto err;
  } else {
    cerr << "Socket connected.\n";
  }

  // temp:
  // write a 48 byte packet
  char buffer_data[48];  memset((char*)buffer_data, 0, 96);
  buffer_data[0] = 'a';  buffer_data[1] = 's';

  if (minet_write(fd, buf, 48) < 0) {
    cerr << "Write failed.\n";
    minet_perror("reason:");
    //goto err;
  }

  while (1) {
    cout << "";

  }

 err:
  minet_close(fd);
  minet_deinit();
  return 0;
}