/*
 * FreeRTOS Kernel V10.0.1
 * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * http://www.FreeRTOS.org
 * http://aws.amazon.com/freertos
 *
 * 1 tab == 4 spaces!
 */


/* Task that controls the uIP TCP/IP stack. */


/* Standard includes. */
#include <string.h>

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"

/* uip includes. */
#include "uip.h"
#include "uip_arp.h"
#include "httpd.h"
#include "timer.h"
#include "clock-arch.h"

/* Demo includes. */
#include "FEC.h"
#include "partest.h"


/*-----------------------------------------------------------*/

/* Shortcut to the header within the Rx buffer. */
#define xHeader ((struct uip_eth_hdr *) &uip_buf[ 0 ])

/*-----------------------------------------------------------*/

/*
 * Port functions required by the uIP stack.
 */
void clock_init( void );
clock_time_t clock_time( void );
extern void timer_set(struct timer *t, clock_time_t interval);
extern int timer_expired(struct timer *t);
extern void timer_reset(struct timer *t);

/*-----------------------------------------------------------*/

/* The semaphore used by the ISR to wake the uIP task. */
extern xSemaphoreHandle xFECSemaphore;

/*-----------------------------------------------------------*/

void clock_init(void)
{
	/* This is done when the scheduler starts. */
}
/*-----------------------------------------------------------*/

/* Define clock functions here to avoid header file name clash between uIP
and the Luminary Micro driver library. */
clock_time_t clock_time( void )
{
	return xTaskGetTickCount();
}
/*-----------------------------------------------------------*/

void vuIP_Task( void *pvParameters )
{
portBASE_TYPE i;
uip_ipaddr_t xIPAddr;
struct timer periodic_timer, arp_timer;

	/* To prevent compiler warnings. */
	( void ) pvParameters;

	/* Initialise the uIP stack. */
	timer_set( &periodic_timer, configTICK_RATE_HZ / 2 );
	timer_set( &arp_timer, configTICK_RATE_HZ * 10 );
	uip_init();
	uip_ipaddr( xIPAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
	uip_sethostaddr( xIPAddr );

	/* Initialise the WEB server. */
	httpd_init();

	/* Initialise the Ethernet controller peripheral. */
	vFECInit();

	for( ;; )
	{
		/* Is there received data ready to be processed? */
		uip_len = usFECGetRxedData();

		if( uip_len > 0 )
		{
			/* Standard uIP loop taken from the uIP manual. */

			if( xHeader->type == htons( UIP_ETHTYPE_IP ) )
			{
				uip_arp_ipin();
				uip_input();

				/* If the above function invocation resulted in data that
				should be sent out on the network, the global variable
				uip_len is set to a value > 0. */
				if( uip_len > 0 )
				{
					uip_arp_out();
					vFECSendData();
				}
				else
				{
					/* If we are not sending data then let the FEC driver know
					the buffer is no longer required. */
					vFECRxProcessingCompleted();
				}
			}
			else if( xHeader->type == htons( UIP_ETHTYPE_ARP ) )
			{
				uip_arp_arpin();

				/* If the above function invocation resulted in data that
				should be sent out on the network, the global variable
				uip_len is set to a value > 0. */
				if( uip_len > 0 )
				{
					vFECSendData();
				}
				else
				{
					/* If we are not sending data then let the FEC driver know
					the buffer is no longer required. */
					vFECRxProcessingCompleted();
				}
			}
			else
			{
				/* If we are not sending data then let the FEC driver know
				the buffer is no longer required. */
				vFECRxProcessingCompleted();
			}
		}
		else
		{
			if( timer_expired( &periodic_timer ) )
			{
				timer_reset( &periodic_timer );
				for( i = 0; i < UIP_CONNS; i++ )
				{
					uip_periodic( i );

					/* If the above function invocation resulted in data that
					should be sent out on the network, the global variable
					uip_len is set to a value > 0. */
					if( uip_len > 0 )
					{
						uip_arp_out();
						vFECSendData();
					}
				}

				/* Call the ARP timer function every 10 seconds. */
				if( timer_expired( &arp_timer ) )
				{
					timer_reset( &arp_timer );
					uip_arp_timer();
				}
			}
			else
			{
				/* We did not receive a packet, and there was no periodic
				processing to perform.  Block for a fixed period.  If a packet
				is received during this period we will be woken by the ISR
				giving us the Semaphore. */
				xSemaphoreTake( xFECSemaphore, configTICK_RATE_HZ / 2 );
			}
		}
	}
}
/*-----------------------------------------------------------*/