2 * FreeRTOS Kernel V10.1.0
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3 * Copyright (C) 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software.
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 * http://www.FreeRTOS.org
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23 * http://aws.amazon.com/freertos
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25 * 1 tab == 4 spaces!
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29 Implements a simplistic WEB server. Every time a connection is made and
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30 data is received a dynamic page that shows the current TCP/IP statistics
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31 is generated and returned. The connection is then closed.
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33 This file was adapted from a FreeRTOS lwIP slip demo supplied by a third
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37 /* ------------------------ System includes ------------------------------- */
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40 /* ------------------------ FreeRTOS includes ----------------------------- */
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41 #include "FreeRTOS.h"
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45 /* ------------------------ lwIP includes --------------------------------- */
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46 #include "lwip/api.h"
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47 #include "lwip/tcpip.h"
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48 #include "lwip/ip.h"
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49 #include "lwip/memp.h"
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50 #include "lwip/stats.h"
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51 #include "netif/loopif.h"
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53 /* ------------------------ Project includes ------------------------------ */
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56 #include "HTTPDemo.h"
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58 /* ------------------------ Defines --------------------------------------- */
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59 /* The size of the buffer in which the dynamic WEB page is created. */
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60 #define webMAX_PAGE_SIZE ( 1024 ) /*FSL: buffer containing array*/
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62 /* Standard GET response. */
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63 #define webHTTP_OK "HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"
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65 /* The port on which we listen. */
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66 #define webHTTP_PORT ( 80 )
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68 /* Delay on close error. */
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69 #define webSHORT_DELAY ( 10 )
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71 /* Format of the dynamic page that is returned on each connection. */
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72 #define webHTML_START \
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76 <BODY onLoad=\"window.setTimeout("location.href='index.html'",1000)\"bgcolor=\"#CCCCff\">\
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77 \r\n\r\nPage Hits = "
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79 #define webHTML_END \
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85 #if INCLUDE_uxTaskGetStackHighWaterMark
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86 static volatile unsigned portBASE_TYPE uxHighWaterMark_web = 0;
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89 /* ------------------------ Prototypes ------------------------------------ */
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90 static void vProcessConnection( struct netconn *pxNetCon );
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92 /*------------------------------------------------------------*/
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95 * Process an incoming connection on port 80.
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97 * This simply checks to see if the incoming data contains a GET request, and
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98 * if so sends back a single dynamically created page. The connection is then
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99 * closed. A more complete implementation could create a task for each
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102 static void vProcessConnection( struct netconn *pxNetCon )
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104 static char cDynamicPage[webMAX_PAGE_SIZE], cPageHits[11];
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105 struct netbuf *pxRxBuffer;
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107 unsigned short usLength;
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108 static unsigned long ulPageHits = 0;
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110 /* We expect to immediately get data. */
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111 pxRxBuffer = netconn_recv( pxNetCon );
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113 if( pxRxBuffer != NULL )
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115 /* Where is the data? */
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116 netbuf_data( pxRxBuffer, ( void * )&pcRxString, &usLength );
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118 /* Is this a GET? We don't handle anything else. */
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119 if( !strncmp( pcRxString, "GET", 3 ) )
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121 pcRxString = cDynamicPage;
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123 /* Update the hit count. */
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125 sprintf( cPageHits, "%d", (int)ulPageHits );
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127 /* Write out the HTTP OK header. */
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128 netconn_write( pxNetCon, webHTTP_OK, ( u16_t ) strlen( webHTTP_OK ), NETCONN_COPY );
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130 /* Generate the dynamic page...
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132 ... First the page header. */
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133 strcpy( cDynamicPage, webHTML_START );
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134 /* ... Then the hit count... */
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135 strcat( cDynamicPage, cPageHits );
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137 strcat( cDynamicPage,
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138 "<p><pre>Task State Priority Stack #<br>************************************************<br>" );
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139 /* ... Then the list of tasks and their status... */
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140 vTaskList( cDynamicPage + strlen( cDynamicPage ) );
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142 /* ... Finally the page footer. */
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143 strcat( cDynamicPage, webHTML_END );
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145 /* Write out the dynamically generated page. */
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146 netconn_write( pxNetCon, cDynamicPage, ( u16_t ) strlen( cDynamicPage ), NETCONN_COPY );
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148 netbuf_delete( pxRxBuffer );
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150 netconn_close( pxNetCon );
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153 /*------------------------------------------------------------*/
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155 void vlwIPInit( void )
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157 /* Initialize lwIP and its interface layer. */
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158 tcpip_init( NULL, NULL );
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161 /*------------------------------------------------------------*/
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163 void vBasicWEBServer( void *pvParameters )
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165 struct netconn *pxHTTPListener, *pxNewConnection;
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166 struct ip_addr xIpAddr, xNetMast, xGateway;
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167 static struct netif fec523x_if;
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168 extern err_t ethernetif_init(struct netif *netif);
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170 /* Parameters are not used - suppress compiler error. */
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171 ( void )pvParameters;
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175 /* Create and configure the FEC interface. */
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176 IP4_ADDR( &xIpAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
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177 IP4_ADDR( &xNetMast, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
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178 IP4_ADDR( &xGateway, configGW_ADDR0, configGW_ADDR1, configGW_ADDR2, configGW_ADDR3 );
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179 netif_add( &fec523x_if, &xIpAddr, &xNetMast, &xGateway, NULL, ethernetif_init, tcpip_input );
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181 /* make it the default interface */
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182 netif_set_default( &fec523x_if );
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185 netif_set_up( &fec523x_if );
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187 /* Create a new tcp connection handle */
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188 pxHTTPListener = netconn_new( NETCONN_TCP );
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189 netconn_bind( pxHTTPListener, NULL, webHTTP_PORT );
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190 netconn_listen( pxHTTPListener );
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195 /* Wait for connection. */
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196 pxNewConnection = netconn_accept( pxHTTPListener );
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198 if( pxNewConnection != NULL )
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200 /* Service connection. */
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201 vProcessConnection( pxNewConnection );
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202 while( netconn_delete( pxNewConnection ) != ERR_OK )
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204 vTaskDelay( webSHORT_DELAY );
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