/* File  : client_udp.c                                                  */
/* Author: Dave Reed                                                     */
/*                                                                       */
/* This program uses a datagram socket to exchange messages with a       */
/* server process.                                                       */
/*************************************************************************/

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

#define PORT 52051
#define HOST "duck.creighton.edu"

int main()
{
  int sockfd, length;
  struct sockaddr_in serv_addr, from;
  struct hostent *server;
  char buffer[256];

  sockfd = socket(AF_INET, SOCK_DGRAM, 0);

  server = gethostbyname(HOST);
  serv_addr.sin_family = AF_INET;  
  bcopy(server->h_addr,&serv_addr.sin_addr,server->h_length);
  serv_addr.sin_port = htons(PORT);

  printf("Please enter the message: ");
  bzero(buffer,256);
  fgets(buffer,255,stdin);

  length=sizeof(struct sockaddr_in);
  sendto(sockfd,buffer,strlen(buffer),0,&serv_addr,length);

  recvfrom(sockfd,buffer,256,0,&from,&length);

  printf("Got an ack: %s\n", buffer);

  return 0;
}