#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <string.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define PORTNUMBER  8189

int main(int argc, char * argv[])
{
   int n, s, len;
   char buf[1024];
   char op1[]="ON";
   char op2[]="OFF";
   char hostname[64];
   struct hostent *hp;
   struct sockaddr_in name;

   switch(argc) {
     case 1:
       /* Get our local host name.  */
       gethostname(hostname, sizeof(hostname));
       break;
     case 2:
       /* Get name from command line */
       strcpy(hostname, argv[1]);
       break;
        default:
       printf("Usage: %s [server_name]\n",argv[0]);
       exit(-1);
    }

   /* Look up our host's network address.*/
   hp = gethostbyname(hostname);

   /* Create a socket in the INET domain.*/
   s = socket(AF_INET, SOCK_STREAM, 0);

   /* Create the address of the server. */
   name.sin_family = AF_INET;
   name.sin_port = htons(PORTNUMBER);
   memcpy(&name.sin_addr, hp->h_addr_list[0], hp->h_length);
   len = sizeof(struct sockaddr_in);

   /* Connect to the server. */
   connect(s, (struct sockaddr *) &name, len);

   /* Read from standard input, and copy the
     * data to the socket. */
   printf("Bienvenido al Switch en linea\n");
   printf("Para encender luces ingrese ON, para apagarlas ingrese OFF, para desconectarse del servidor ingrese BYE\n");
   printf("Como medida de seguridad, al inicar el cliente automáticamente apagará las luces de su casa\n");

   while ((n = read(0, buf, sizeof(buf))) > 0) {
      if (send(s, buf, n, 0) < 0) {
	  perror("send");
	  exit(1);
       }
      if((strcmp(buf,op1))==0)
	printf("Ha encendido las luces\nIngrese su opción: ");

      if((strcmp(buf,op2))==0)
	printf("Ha apagado las luces\nIngrese su opcion: ");
   }

   close(s);
   exit(0);
}