/*
	FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd.

	This file is part of the FreeRTOS distribution.

	FreeRTOS is free software; you can redistribute it and/or modify it	under 
	the terms of the GNU General Public License (version 2) as published by the 
	Free Software Foundation and modified by the FreeRTOS exception.
	**NOTE** The exception to the GPL is included to allow you to distribute a
	combined work that includes FreeRTOS without being obliged to provide the 
	source code for proprietary components outside of the FreeRTOS kernel.  
	Alternative commercial license and support terms are also available upon 
	request.  See the licensing section of http://www.FreeRTOS.org for full 
	license details.

	FreeRTOS is distributed in the hope that it will be useful,	but WITHOUT
	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
	more details.

	You should have received a copy of the GNU General Public License along
	with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59
	Temple Place, Suite 330, Boston, MA  02111-1307  USA.


	***************************************************************************
	*                                                                         *
	* Looking for a quick start?  Then check out the FreeRTOS eBook!          *
	* See http://www.FreeRTOS.org/Documentation for details                   *
	*                                                                         *
	***************************************************************************

	1 tab == 4 spaces!

	Please ensure to read the configuration and relevant port sections of the
	online documentation.

	http://www.FreeRTOS.org - Documentation, latest information, license and
	contact details.

	http://www.SafeRTOS.com - A version that is certified for use in safety
	critical systems.

	http://www.OpenRTOS.com - Commercial support, development, porting,
	licensing and training services.
*/

/*
	Implements a simplistic WEB server.  Every time a connection is made and
	data is received a dynamic page that shows the current TCP/IP statistics
	is generated and returned.  The connection is then closed.

	This file was adapted from a FreeRTOS lwIP slip demo supplied by a third
	party.
*/

/*
	Changes from V3.2.2

	+ Changed the page returned by the lwIP WEB server demo to display the 
	  task status table rather than the TCP/IP statistics.
*/


/* Standard includes. */
#include <stdio.h>
#include <string.h>

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"

/* Demo includes. */
#include "BasicWEB.h"
#include "SAM7_EMAC.h"

/* lwIP includes. */
#include "lwip/api.h" 
#include "lwip/tcpip.h"
#include "lwip/memp.h" 
#include "lwip/stats.h"
#include "netif/loopif.h"

/* The size of the buffer in which the dynamic WEB page is created. */
#define webMAX_PAGE_SIZE	2048

/* Standard GET response. */
#define webHTTP_OK	"HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"

/* The port on which we listen. */
#define webHTTP_PORT		( 80 )

/* Delay on close error. */
#define webSHORT_DELAY		( 10 )

/* Format of the dynamic page that is returned on each connection. */
#define webHTML_START \
"<html>\
<head>\
</head>\
<BODY onLoad=\"window.setTimeout(&quot;location.href='index.html'&quot;,1000)\"bgcolor=\"#CCCCff\">\
\r\nPage Hits = "

#define webHTML_END \
"\r\n</pre>\
\r\n</BODY>\
</html>"

/*------------------------------------------------------------*/

/* 
 * Process an incoming connection on port 80.
 *
 * This simply checks to see if the incoming data contains a GET request, and
 * if so sends back a single dynamically created page.  The connection is then
 * closed.  A more complete implementation could create a task for each 
 * connection. 
 */
static void vProcessConnection( struct netconn *pxNetCon );

/*------------------------------------------------------------*/

static void vProcessConnection( struct netconn *pxNetCon )
{
static portCHAR cDynamicPage[ webMAX_PAGE_SIZE ], cPageHits[ 11 ];
struct netbuf *pxRxBuffer;
portCHAR *pcRxString;
unsigned portSHORT usLength;
static unsigned portLONG ulPageHits = 0;

	/* We expect to immediately get data. */
	pxRxBuffer = netconn_recv( pxNetCon );

	if( pxRxBuffer != NULL )
	{
		/* Where is the data? */
		netbuf_data( pxRxBuffer, ( void * ) &pcRxString, &usLength );	   
	
		/* Is this a GET?  We don't handle anything else. */
		if( !strncmp( pcRxString, "GET", 3 ) )
		{
			pcRxString = cDynamicPage;

			/* Update the hit count. */
			ulPageHits++;
			sprintf( cPageHits, "%lu", ulPageHits );

			/* Write out the HTTP OK header. */
            netconn_write(pxNetCon, webHTTP_OK, (u16_t)strlen( webHTTP_OK ), NETCONN_COPY );

			/* Generate the dynamic page...

			... First the page header. */
			strcpy( cDynamicPage, webHTML_START );
			/* ... Then the hit count... */
			strcat( cDynamicPage, cPageHits );
			strcat( cDynamicPage, "<p><pre>Task          State  Priority  Stack	#<br>************************************************<br>" );
			/* ... Then the list of tasks and their status... */
			vTaskList( ( signed portCHAR * ) cDynamicPage + strlen( cDynamicPage ) );	
			/* ... Finally the page footer. */
			strcat( cDynamicPage, webHTML_END );

			/* Write out the dynamically generated page. */
			netconn_write(pxNetCon, cDynamicPage, (u16_t)strlen( cDynamicPage ), NETCONN_COPY );
		}
 
		netbuf_delete( pxRxBuffer );
	}

	netconn_close( pxNetCon );
}
/*------------------------------------------------------------*/

void vlwIPInit( void )
{
    /* Initialize lwIP and its interface layer. */
	sys_init();
	mem_init();								
	memp_init();
	pbuf_init(); 
	netif_init();
	ip_init();
	tcpip_init( NULL, NULL );
}
/*------------------------------------------------------------*/

void vBasicWEBServer( void *pvParameters )
{
struct netconn *pxHTTPListener, *pxNewConnection;
struct ip_addr xIpAddr, xNetMast, xGateway;
extern err_t ethernetif_init( struct netif *netif );
static struct netif EMAC_if;

	/* Parameters are not used - suppress compiler error. */
	( void ) pvParameters;


	/* Create and configure the EMAC interface. */
	IP4_ADDR(&xIpAddr,emacIPADDR0,emacIPADDR1,emacIPADDR2,emacIPADDR3);
	IP4_ADDR(&xNetMast,emacNET_MASK0,emacNET_MASK1,emacNET_MASK2,emacNET_MASK3);
	IP4_ADDR(&xGateway,emacGATEWAY_ADDR0,emacGATEWAY_ADDR1,emacGATEWAY_ADDR2,emacGATEWAY_ADDR3);
	netif_add(&EMAC_if, &xIpAddr, &xNetMast, &xGateway, NULL, ethernetif_init, tcpip_input);

	/* make it the default interface */
    netif_set_default(&EMAC_if);

	/* bring it up */
    netif_set_up(&EMAC_if);
	
	/* Create a new tcp connection handle */

 	pxHTTPListener = netconn_new( NETCONN_TCP );
	netconn_bind(pxHTTPListener, NULL, webHTTP_PORT );
	netconn_listen( pxHTTPListener );

	/* Loop forever */
	for( ;; )
	{
		/* Wait for connection. */
		pxNewConnection = netconn_accept(pxHTTPListener);

		if(pxNewConnection != NULL)
		{
			/* Service connection. */
			vProcessConnection( pxNewConnection );
			while( netconn_delete( pxNewConnection ) != ERR_OK )
			{
				vTaskDelay( webSHORT_DELAY );
			}
		}
	}
}