#include <errno.h>       /* obligatory includes */
#include <signal.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <netinet/in.h>
#include <netdb.h>
#include "sockets.h"

void do_something(int);

int main(int argc, char **argv)
{ int s, t;
  int portnum;

  if (argc != 2) {
    printf("%s <portnum>\n", argv[0]);
    return -1;
  }

  sscanf(argv[1], "%d", &portnum);

  /* call this once to start server running on port PORTNUM */
  if ((s= establish(portnum)) < 0) {  /* plug in the phone */
    perror("establish");
    return 1;
  }

  /* call get_connection for each client connection you want to accept */
  if ((t= get_connection(s)) < 0) { /* get a connection */
    if (errno != EINTR) {             /* EINTR might happen on accept(), */
      perror("accept");               /* bad */
      return 1;
    }
  }
  do_something(t);
  return 0;
}

/* this is the function that plays with the socket.  it will be called
 * after getting a connection.
 */
void do_something(int s)
{
  int x = 10;
  int y = 15;

  char buf[100];
  printf("do something\n");
  read_string(s, buf);
  printf("server received \"%s\" from socket %d\n", buf, s);

  sprintf(buf, "%d %d", x, y);
  write_data(s, buf, strlen(buf)+1);
  printf("server sent \"%s\" to socket %d\n", buf, s);


}