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Richard Barry
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241
20100923-V6.1.0-RC2/Demo/lwIP_Demo_Rowley_ARM7/BasicWEB.c
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20100923-V6.1.0-RC2/Demo/lwIP_Demo_Rowley_ARM7/BasicWEB.c
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/*
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FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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* + Looking for basic training, *
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* + Wanting to improve your FreeRTOS skills and productivity *
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* *
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* then take a look at the FreeRTOS books - available as PDF or paperback *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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* to your inbox within 20 minutes to two hours when purchased between 8am *
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* and 8pm GMT (although please allow up to 24 hours in case of *
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* exceptional circumstances). Thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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***NOTE*** The exception to the GPL is included to allow you to distribute
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a combined work that includes FreeRTOS without being obliged to provide the
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source code for proprietary components outside of the FreeRTOS kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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/*
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Implements a simplistic WEB server. Every time a connection is made and
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data is received a dynamic page that shows the current TCP/IP statistics
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is generated and returned. The connection is then closed.
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This file was adapted from a FreeRTOS lwIP slip demo supplied by a third
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party.
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*/
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/*
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Changes from V3.2.2
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+ Changed the page returned by the lwIP WEB server demo to display the
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task status table rather than the TCP/IP statistics.
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*/
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/* Standard includes. */
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#include <stdio.h>
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#include <string.h>
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/* Scheduler includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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#include "semphr.h"
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/* Demo includes. */
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#include "BasicWEB.h"
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#include "SAM7_EMAC.h"
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/* lwIP includes. */
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#include "lwip/api.h"
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#include "lwip/tcpip.h"
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#include "lwip/memp.h"
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#include "lwip/stats.h"
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#include "netif/loopif.h"
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/* The size of the buffer in which the dynamic WEB page is created. */
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#define webMAX_PAGE_SIZE 2048
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/* Standard GET response. */
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#define webHTTP_OK "HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"
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/* The port on which we listen. */
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#define webHTTP_PORT ( 80 )
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/* Delay on close error. */
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#define webSHORT_DELAY ( 10 )
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/* Format of the dynamic page that is returned on each connection. */
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#define webHTML_START \
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"<html>\
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<head>\
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</head>\
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<BODY onLoad=\"window.setTimeout("location.href='index.html'",1000)\"bgcolor=\"#CCCCff\">\
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\r\nPage Hits = "
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#define webHTML_END \
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"\r\n</pre>\
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\r\n</BODY>\
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</html>"
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/*------------------------------------------------------------*/
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/*
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* Process an incoming connection on port 80.
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*
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* This simply checks to see if the incoming data contains a GET request, and
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* if so sends back a single dynamically created page. The connection is then
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* closed. A more complete implementation could create a task for each
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* connection.
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*/
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static void vProcessConnection( struct netconn *pxNetCon );
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/*------------------------------------------------------------*/
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static void vProcessConnection( struct netconn *pxNetCon )
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{
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static char cDynamicPage[ webMAX_PAGE_SIZE ], cPageHits[ 11 ];
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struct netbuf *pxRxBuffer;
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char *pcRxString;
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unsigned short usLength;
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static unsigned long ulPageHits = 0;
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/* We expect to immediately get data. */
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pxRxBuffer = netconn_recv( pxNetCon );
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if( pxRxBuffer != NULL )
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{
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/* Where is the data? */
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netbuf_data( pxRxBuffer, ( void * ) &pcRxString, &usLength );
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/* Is this a GET? We don't handle anything else. */
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if( !strncmp( pcRxString, "GET", 3 ) )
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{
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pcRxString = cDynamicPage;
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/* Update the hit count. */
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ulPageHits++;
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sprintf( cPageHits, "%lu", ulPageHits );
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/* Write out the HTTP OK header. */
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netconn_write(pxNetCon, webHTTP_OK, (u16_t)strlen( webHTTP_OK ), NETCONN_COPY );
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/* Generate the dynamic page...
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... First the page header. */
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strcpy( cDynamicPage, webHTML_START );
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/* ... Then the hit count... */
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strcat( cDynamicPage, cPageHits );
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strcat( cDynamicPage, "<p><pre>Task State Priority Stack #<br>************************************************<br>" );
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/* ... Then the list of tasks and their status... */
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vTaskList( ( signed char * ) cDynamicPage + strlen( cDynamicPage ) );
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/* ... Finally the page footer. */
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strcat( cDynamicPage, webHTML_END );
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/* Write out the dynamically generated page. */
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netconn_write(pxNetCon, cDynamicPage, (u16_t)strlen( cDynamicPage ), NETCONN_COPY );
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}
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netbuf_delete( pxRxBuffer );
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}
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netconn_close( pxNetCon );
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}
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/*------------------------------------------------------------*/
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void vlwIPInit( void )
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{
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/* Initialize lwIP and its interface layer. */
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sys_init();
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mem_init();
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memp_init();
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pbuf_init();
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netif_init();
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ip_init();
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tcpip_init( NULL, NULL );
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}
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/*------------------------------------------------------------*/
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void vBasicWEBServer( void *pvParameters )
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{
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struct netconn *pxHTTPListener, *pxNewConnection;
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struct ip_addr xIpAddr, xNetMast, xGateway;
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extern err_t ethernetif_init( struct netif *netif );
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static struct netif EMAC_if;
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/* Parameters are not used - suppress compiler error. */
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( void ) pvParameters;
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/* Create and configure the EMAC interface. */
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IP4_ADDR(&xIpAddr,emacIPADDR0,emacIPADDR1,emacIPADDR2,emacIPADDR3);
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IP4_ADDR(&xNetMast,emacNET_MASK0,emacNET_MASK1,emacNET_MASK2,emacNET_MASK3);
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IP4_ADDR(&xGateway,emacGATEWAY_ADDR0,emacGATEWAY_ADDR1,emacGATEWAY_ADDR2,emacGATEWAY_ADDR3);
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netif_add(&EMAC_if, &xIpAddr, &xNetMast, &xGateway, NULL, ethernetif_init, tcpip_input);
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/* make it the default interface */
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netif_set_default(&EMAC_if);
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/* bring it up */
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netif_set_up(&EMAC_if);
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/* Create a new tcp connection handle */
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pxHTTPListener = netconn_new( NETCONN_TCP );
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netconn_bind(pxHTTPListener, NULL, webHTTP_PORT );
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netconn_listen( pxHTTPListener );
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/* Loop forever */
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for( ;; )
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{
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/* Wait for connection. */
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pxNewConnection = netconn_accept(pxHTTPListener);
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if(pxNewConnection != NULL)
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{
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/* Service connection. */
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vProcessConnection( pxNewConnection );
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while( netconn_delete( pxNewConnection ) != ERR_OK )
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{
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vTaskDelay( webSHORT_DELAY );
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}
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}
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}
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}
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