/* chatserver.c
 * Author: Sam Rebelsky
 * Version 1.0
 * IN PROGRESS!
 */

/* Set up the "client".  Returns a socket you can use for 
 * communication.  Either may exit if an error occurs.
 * Post: Returns an active socket
 */
int setupServer();
int setupClient(char *hostName);

/********
 * Main *
 **********************************************************/

int
main(int argc, char *argv[])
{
  /* I. Declare variables. */
  int s;	/* The socket used for communication. */
  /* II. Decide what role to play. */
  /* A. It's the server. */
  if (strcmp(argv[0],"cserver") == 0) {
    /* 1. Set up the server. */
    s = setupServer();
    /* 2. Alternately receive and send messages. */
    while (receive(s) && spew(s))
      ;
  }
  /* B. It's the client. */
  else if (strcmp(argv[0], "cclient") == 0) {
    /* 1. Set it up. */
    if (argc == 2) {
      s = setupClient(argv[1]);
    }
    else {
      fprintf(stderr, "Usage: %s servername\n", argv[0]);
      exit(1);
    }
    /* 2. Alternately send and receive messages. */
    while (spew(s) && receive(s))
      ;
  }
  /* C. It's neither.  Crash. */
  else {
    fprintf(stderr, "Sorry, this can only be run as cserver or cclient.\n");
    exit(5);
  }
  /* III. Clean up. */
  close(s);
  exit(0);
} // main()