📄 web.c

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/*    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.    ****************************************************************************//*    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(&quot;location.href='index.html'&quot;,1000)\"bgcolor=\"#CCCCff\">\\r\nPage Hits = "#define webHTML_END \"\r\n" \"FreeRTOS MCF5235 port (c) 2006 by Christian Walter &lt;wolti@sil.at&gt;\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 voidvProcessConnection( 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 );}/*------------------------------------------------------------*/voidvlwIPInit( void ){    /* Initialize lwIP and its interface layer. */    sys_init(  );    mem_init(  );    memp_init(  );    pbuf_init(  );    netif_init(  );    ip_init(  );    tcpip_init( NULL, NULL );}/*------------------------------------------------------------*/voidvBasicWEBServer( 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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