COMPLEMENT DE COURS
Connexion du type : ./prog 127.0.0.1 80

struct sockaddr_in cli ;
int sockfd ;

bzero(&cli,sizeof(cli)) ;
cli.sin_family = AF_INET ;
cli.sin_addr.s_addr = getip(argv[2]) ;
cli.sin_port = htons(atoi(argv[3]) ;


long getip(char *name)
{
  struct hostent *hp;
  long ip;
  if ((ip=inet_addr(name))==-1)
  {
    if ((hp=gethostbyname(name))==NULL)
    {
      fprintf(stderr, "gethostbyname failed.\n");
      exit(1);
    }
    memcpy(&ip, (hp->h_addr), 4);
  }
  return ip ;
}
if(argc >= 3){
if(strcmp(argv[2], "-omni") == 0){

}
}