#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 <netdb.h>

#define K	1024

int main(int argc, char *argv[])
{
  struct hostent *he;
  struct sockaddr_in server;
  char buf[K];
  int sock, r, n;
  
  if (argc < 2) {
    fprintf(stderr,"Usage: client <hostname>\n");
    return 0;
  }

  sock = socket(AF_INET, SOCK_STREAM, 0);
  if (sock < 0) {
    perror("socket");
    exit(1);
  }
  
  server.sin_family = AF_INET;
  if ((he = gethostbyname(argv[1])) == NULL) {
    fprintf(stderr,"Unknown host: %s\n", argv[1]);
    exit(1);
  }
  memcpy(&server.sin_addr, he->h_addr, he->h_length);
  server.sin_port = htons(47350);
  
  if (connect(sock, (struct sockaddr *)&server, sizeof(server)) < 0) {
    perror("connect");
    exit(1);
  }
  while(fgets(buf, K, stdin) != NULL) {
    n = htonl(atoi(buf));
    if (write(sock, &n, sizeof(n)) < 0) break;
    if ((r = read(sock, buf, K)) < 0) break;
    printf("%.*s\n", r, buf);
  }
  return 0;
}