/*
	FreeRTOS.org V5.1.2 - Copyright (C) 2003-2009 Richard Barry.

	This file is part of the FreeRTOS.org distribution.

	FreeRTOS.org is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	FreeRTOS.org 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.org; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

	A special exception to the GPL can be applied should you wish to distribute
	a combined work that includes FreeRTOS.org, without being obliged to provide
	the source code for any proprietary components.  See the licensing section
	of http://www.FreeRTOS.org for full details of how and when the exception
	can be applied.

    ***************************************************************************
    ***************************************************************************
    *                                                                         *
    * Get the FreeRTOS eBook!  See http://www.FreeRTOS.org/Documentation      *
	*                                                                         *
	* This is a concise, step by step, 'hands on' guide that describes both   *
	* general multitasking concepts and FreeRTOS specifics. It presents and   *
	* explains numerous examples that are written using the FreeRTOS API.     *
	* Full source code for all the examples is provided in an accompanying    *
	* .zip file.                                                              *
    *                                                                         *
    ***************************************************************************
    ***************************************************************************

	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 );
			}
		}
	}
}