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

/* Port fuer die Requests */
#define PORT 7777

/* Puffergroesse */
#define BUFSIZE 16384

int main(int argc, char **argv)
  {
  struct sockaddr_in host_addr;
  int size;
  int sock;
  struct hostent *host;
  char buffer[BUFSIZE];

  if (2 != argc) 
    {
    fprintf(stderr, "Angabe des Servers fehlt\n");
    return -1;
    }

  host = gethostbyname(argv[1]);
  if (host == NULL)
    {
    fprintf(stderr, "Unbekannter Host %s\n",argv[1]);
    return -1;
    }

  /* Socket erzeugen */
  sock = socket(AF_INET, SOCK_STREAM, 0);
  if (sock < 0)
    {
    fprintf(stderr, "Error: socket\n");
    return -1;
    }
  /* Socket an das Ziel binden */
  memset( &host_addr, 0, sizeof (host_addr));
  host_addr.sin_family = AF_INET;
  host_addr.sin_addr = *((struct in_addr *)host->h_addr);
  host_addr.sin_port = htons(PORT);
  /* Verbindung aufbauen */
  if (connect(sock, (struct sockaddr *)&host_addr, sizeof(host_addr)) == -1)
    {
    fprintf(stderr, "Error: connect\n");
    return -1;
    }
  /* Daten empfangen */
  size = recv(sock, buffer, BUFSIZE, 0);
  if (size == -1)
    {
    fprintf(stderr, "reading data failed\n");
    return -1;
    }

  printf("%d Bytes: %s\n",size,buffer);
  /* Socket wieder freigeben */
  close(sock);
  return 0;
  }