/* File: client.c */

/*
 *********************************************************************
   ALTERNATING BIT AND GO-BACK-N NETWORK EMULATOR

   Revised version of code by J.F. Kurose

   From the companion website for 
   _Computer Networking: A Top-Down Approach Featuring the Internet_
   by J.F. Kurose and K. W. Ross
   (c) 2001 by Addison Wesley Longman

   Based on document at <URL:http://occawlonline.pearsoned.com/
   bookbind/pubbooks/kurose-ross1/chapter4/custom12/deluxe-content.html>
   (as of 02 July 2002)
 *********************************************************************
*/

#include <stdio.h>
#include "message.h"
#include "payload.h"
#include "packet.h"
#include "client.h"
#include "KRnet.h"


/* prototypes for private functions */
static void startTimer(float howlong);
static void cancelTimer(void);
static void sendToNWSlayer(packet_t packet);
static void deliverToAppLayer(char datasent[]);

/* ****************** */
/*  Client functions  */
/* ****************** */

void sendToNWSlayer(packet_t packet) {
  toNWSlayer(Client, packet);
} /* sendToNWSlayer() */

void deliverToAppLayer(char datasent[]) {
  toAppLayer(Client, datasent);
} /* deliverToAppLayer() */

void
startTimer(float howlong) {
  startClientTimer(howlong);
} /* startTimer() */

void
cancelTimer(void) {
  stopClientTimer();
} /* cancelTimer() */


/******** STUDENTS WRITE THESE NEXT FOUR ROUTINES ********/

/*-------------*/
/* clientInit  */
/*             *---------------------------------------------------*/
/* Called only once, before any other Client (entity A) routines   */
/* are called.  You can use it to do any initialization.           */
/*-----------------------------------------------------------------*/
void
clientInit(void) {

}/* clientInit() */


/*------------*/
/* clientEnd  */
/*            *----------------------------------------------------*/
/* Called only once, after all other Client (entity A) routines    */
/* are called.  You can use it to print any final output.          */
/*-----------------------------------------------------------------*/
void
clientEnd(void) {

}/* clientEnd() */


/*-------------*/
/* clientInput */
/*             *---------------------------------------------------*/
/*                                                                 */
/* called from layer 3 (Network Services), when a packet arrives   */
/* for layer 4 (Transport) at Client (entity A)                    */ 
/*-----------------------------------------------------------------*/
void
clientInput(packet_t packet) {
	
} /* ClientInput() */


/*-----------------------*/
/* clientOutput          */
/*                       *-----------------------------------------*/
/*                                                                 */
/* called from the application layer (layer 5).  Passed the data   */
/* to be sent to server (entity B)                                 */
/*-----------------------------------------------------------------*/
void
clientOutput(message_t message) {

} /* clientOutput() */


/*----------------------*/
/* clientTimerInterrupt */
/*                      *------------------------------------------*/
/*                                                                 */
/* Called when the client's timer goes off                         */
/*-----------------------------------------------------------------*/
void
clientTimerInterrupt(void) {
	
} /* clientTimerInterrupt() */ 


/*--------------------------*/
/* clientCanSendMorePkt     */
/*                          *--------------------------------------*/
/*                                                                 */
/* called from the application layer (layer 5) , before passing    */
/* data to ABP layer. return true(nonzero) if ABP layer is not     */
/* in stop status, else return false(zero).                        */
/*-----------------------------------------------------------------*/
int  
clientCanSendMorePkt() {
	return 0;
}

/* EOF (client.c) */