AVR32 - PolarSSL - SSL Example: BasicWEB.c Source File

00001 /*This file has been prepared for Doxygen automatic documentation generation.*/
00015 /* Copyright (c) 2009 Atmel Corporation. All rights reserved.
00016  *
00017  * Redistribution and use in source and binary forms, with or without
00018  * modification, are permitted provided that the following conditions are met:
00019  *
00020  * 1. Redistributions of source code must retain the above copyright notice, this
00021  * list of conditions and the following disclaimer.
00022  *
00023  * 2. Redistributions in binary form must reproduce the above copyright notice,
00024  * this list of conditions and the following disclaimer in the documentation
00025  * and/or other materials provided with the distribution.
00026  *
00027  * 3. The name of Atmel may not be used to endorse or promote products derived
00028  * from this software without specific prior written permission.
00029  *
00030  * 4. This software may only be redistributed and used in connection with an Atmel
00031  * AVR product.
00032  *
00033  * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
00034  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
00035  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
00036  * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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00042  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
00043  *
00044  */
00045 
00046 /*
00047   Implements a simplistic WEB server.  Every time a connection is made and
00048   data is received a dynamic page that shows the current FreeRTOS.org kernel
00049   statistics is generated and returned.  The connection is then closed.
00050 
00051   This file was adapted from a FreeRTOS lwIP slip demo supplied by a third
00052   party.
00053 */
00054 
00055 #if (HTTP_USED == 1)
00056 
00057 
00058 /* Standard includes. */
00059 #include <stdio.h>
00060 #include <string.h>
00061 
00062 #include "conf_eth.h"
00063 
00064 /* Scheduler includes. */
00065 #include "FreeRTOS.h"
00066 #include "task.h"
00067 #include "semphr.h"
00068 #include "partest.h"
00069 #include "serial.h"
00070 
00071 /* Demo includes. */
00072 /* Demo app includes. */
00073 #include "portmacro.h"
00074 
00075 /* lwIP includes. */
00076 #include "lwip/api.h"
00077 #include "lwip/tcpip.h"
00078 #include "lwip/memp.h"
00079 #include "lwip/stats.h"
00080 #include "netif/loopif.h"
00081 
00082 /* ethernet includes */
00083 #include "ethernet.h"
00084 
00086 #define webMAX_PAGE_SIZE    512
00087 
00089 #define webHTTP_OK  "HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"
00090 
00092 #define webHTTP_PORT        ( 80 )
00093 
00095 #define webSHORT_DELAY      ( 10 )
00096 
00098 #define webHTML_START \
00099 "<html>\
00100 <head>\
00101 </head>\
00102 <BODY onLoad=\"window.setTimeout(&quot;location.href='index.html'&quot;,1000)\" bgcolor=\"#FFFFFF\" text=\"#2477E6\">\
00103 \r\nPage Hits = "
00104 
00105 #define webHTML_END \
00106 "\r\n</pre>\
00107 \r\n</font></BODY>\
00108 </html>"
00109 
00110 portCHAR cDynamicPage[ webMAX_PAGE_SIZE ];
00111 portCHAR cPageHits[ 11 ];
00112 
00113 
00115 static void prvweb_ParseHTMLRequest( struct netconn *pxNetCon );
00116 
00117 
00124 portTASK_FUNCTION( vBasicWEBServer, pvParameters )
00125 {
00126 struct netconn *pxHTTPListener, *pxNewConnection;
00127 
00128     /* Create a new tcp connection handle */
00129     pxHTTPListener = netconn_new( NETCONN_TCP );
00130     netconn_bind(pxHTTPListener, NULL, webHTTP_PORT );
00131     netconn_listen( pxHTTPListener );
00132 
00133     /* Loop forever */
00134     for( ;; )
00135     {
00136         /* Wait for a first connection. */
00137         pxNewConnection = netconn_accept(pxHTTPListener);
00138         vParTestSetLED(webCONN_LED, pdTRUE);
00139 
00140         if(pxNewConnection != NULL)
00141         {
00142             prvweb_ParseHTMLRequest(pxNewConnection);
00143         }/* end if new connection */
00144 
00145         vParTestSetLED(webCONN_LED, pdFALSE);
00146 
00147     } /* end infinite loop */
00148 }
00149 
00150 
00157 static void prvweb_ParseHTMLRequest( struct netconn *pxNetCon )
00158 {
00159 struct netbuf *pxRxBuffer;
00160 portCHAR *pcRxString;
00161 unsigned portSHORT usLength;
00162 static unsigned portLONG ulPageHits = 0;
00163 
00164     /* We expect to immediately get data. */
00165     pxRxBuffer = netconn_recv( pxNetCon );
00166 
00167     if( pxRxBuffer != NULL )
00168     {
00169         /* Where is the data? */
00170         netbuf_data( pxRxBuffer, ( void * ) &pcRxString, &usLength );
00171 
00172         /* Is this a GET?  We don't handle anything else. */
00173         if(( NULL != pcRxString               )
00174         && ( !strncmp( pcRxString, "GET", 3 ) ))
00175         {
00176             /* Update the hit count. */
00177             ulPageHits++;
00178             sprintf( cPageHits, "%d", (int)ulPageHits );
00179 
00180             /* Write out the HTTP OK header. */
00181             netconn_write( pxNetCon, webHTTP_OK, (u16_t) strlen( webHTTP_OK ), NETCONN_COPY );
00182 
00183             /* Generate the dynamic page... First the page header. */
00184             strcpy( cDynamicPage, webHTML_START );
00185 
00186             /* ... Then the hit count... */
00187             strcat( cDynamicPage, cPageHits );
00188             strcat( cDynamicPage, "<p><pre>Task          State  Priority  Stack #<br>************************************************<br>" );
00189 
00190             /* ... Then the list of tasks and their status... */
00191             vTaskList( ( signed portCHAR * ) cDynamicPage + strlen( cDynamicPage ) );
00192 
00193             /* ... Finally the page footer. */
00194             strcat( cDynamicPage, webHTML_END );
00195 
00196             /* Write out the dynamically generated page. */
00197             netconn_write( pxNetCon, cDynamicPage, (u16_t) strlen( cDynamicPage ), NETCONN_COPY );
00198         }
00199         netbuf_delete( pxRxBuffer );
00200     }
00201 
00202     netconn_close( pxNetCon );
00203     netconn_delete( pxNetCon );
00204 }
00205 
00206 #endif
00207