web.c
来自「This is the free RTOS on PIC24.」· C语言 代码 · 共 222 行
C
222 行
/*
FreeRTOS V4.1.0 - copyright (C) 2003-2006 Richard Barry.
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 as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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
A special exception to the GPL can be applied should you wish to distribute
a combined work that includes FreeRTOS, 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.
***************************************************************************
See http://www.FreeRTOS.org for documentation, latest information, license
and contact details. Please ensure to read the configuration and relevant
port sections of the online documentation.
Also see http://www.SafeRTOS.com for an IEC 61508 compliant version along
with commercial development and support options.
***************************************************************************
*/
/*
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.
*/
/* ------------------------ System includes ------------------------------- */
#include <stdio.h>
#include <string.h>
/* ------------------------ FreeRTOS includes ----------------------------- */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
/* ------------------------ lwIP includes --------------------------------- */
#include "lwip/api.h"
#include "lwip/tcpip.h"
#include "lwip/memp.h"
#include "lwip/stats.h"
#include "netif/loopif.h"
/* ------------------------ Project includes ------------------------------ */
#include "mcf5xxx.h"
#include "mcf523x.h"
#include "netif/fec.h"
#include "web.h"
/* ------------------------ Defines --------------------------------------- */
/* 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("location.href='index.html'",1000)\"bgcolor=\"#CCCCff\">\
\r\nPage Hits = "
#define webHTML_END \
"\r\n" \
"FreeRTOS MCF5235 port (c) 2006 by Christian Walter <wolti@sil.at>\r\n" \
"</pre>\r\n" \
"</BODY>\r\n" \
"</html>"
/* ------------------------ Prototypes ------------------------------------ */
static void vProcessConnection( struct netconn *pxNetCon );
/*------------------------------------------------------------*/
/*
* 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 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;
static struct netif fec523x_if;
/* Parameters are not used - suppress compiler error. */
( void )pvParameters;
/* Create and configure the EMAC interface. */
IP4_ADDR( &xIpAddr, 10, 0, 10, 2 );
IP4_ADDR( &xNetMast, 255, 255, 255, 0 );
IP4_ADDR( &xGateway, 10, 0, 10, 1 );
netif_add( &fec523x_if, &xIpAddr, &xNetMast, &xGateway, NULL, mcf523xfec_init, tcpip_input );
/* make it the default interface */
netif_set_default( &fec523x_if );
/* bring it up */
netif_set_up( &fec523x_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 );
}
}
}
}
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