#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>

extern int errno;
char bufer[256];

main(int argc,char *argv[]){
     int conexion, l;
     struct  sockaddr_in client;
     struct  hostent *hp, *gethostbyname();
     bzero(&client, sizeof(client));
     client.sin_family = AF_INET;
     client.sin_port = htons(atoi(argv[2]));
     if (isdigit(argv[1][0]))
        client.sin_addr.s_addr = inet_addr(argv[1]);
     else {
        hp = gethostbyname(argv[1]);
        if (hp == NULL) {
           perror ("¿Cual host ? ");
           exit (1);
        }
        bcopy(hp->h_addr, &client.sin_addr, hp->h_length);
      }
/*******************************************************************/
      conexion = socket(AF_INET, SOCK_STREAM, 0);
      if (conexion < 0) {
         perror ("no es posible crear socket");
         exit (1);
      }
/*******************************************************************/
     connect(conexion, (struct  sockaddr *)&client, sizeof(client));
     while((l=read(0, bufer, sizeof(bufer)))>0) write(conexion, bufer, l);
}