3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
6 * this software and associated documentation files (the "Software"), to deal in
7 * the Software without restriction, including without limitation the rights to
8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is furnished to do so,
10 * subject to the following conditions:
12 * The above copyright notice and this permission notice shall be included in all
13 * copies or substantial portions of the Software.
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22 * http://www.FreeRTOS.org
23 * http://aws.amazon.com/freertos
29 Implements a simplistic WEB server. Every time a connection is made and
30 data is received a dynamic page that shows the current TCP/IP statistics
31 is generated and returned. The connection is then closed.
33 This file was adapted from a FreeRTOS lwIP slip demo supplied by a third
37 /* ------------------------ System includes ------------------------------- */
40 /* ------------------------ FreeRTOS includes ----------------------------- */
45 /* ------------------------ lwIP includes --------------------------------- */
47 #include "lwip/tcpip.h"
49 #include "lwip/memp.h"
50 #include "lwip/stats.h"
51 #include "netif/loopif.h"
53 /* ------------------------ Project includes ------------------------------ */
58 /* ------------------------ Defines --------------------------------------- */
59 /* The size of the buffer in which the dynamic WEB page is created. */
60 #define webMAX_PAGE_SIZE ( 1024 ) /*FSL: buffer containing array*/
62 /* Standard GET response. */
63 #define webHTTP_OK "HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"
65 /* The port on which we listen. */
66 #define webHTTP_PORT ( 80 )
68 /* Delay on close error. */
69 #define webSHORT_DELAY ( 10 )
71 /* Format of the dynamic page that is returned on each connection. */
72 #define webHTML_START \
76 <BODY onLoad=\"window.setTimeout("location.href='index.html'",1000)\"bgcolor=\"#CCCCff\">\
85 #if INCLUDE_uxTaskGetStackHighWaterMark
86 static volatile unsigned portBASE_TYPE uxHighWaterMark_web = 0;
89 /* ------------------------ Prototypes ------------------------------------ */
90 static void vProcessConnection( struct netconn *pxNetCon );
92 /*------------------------------------------------------------*/
95 * Process an incoming connection on port 80.
97 * This simply checks to see if the incoming data contains a GET request, and
98 * if so sends back a single dynamically created page. The connection is then
99 * closed. A more complete implementation could create a task for each
102 static void vProcessConnection( struct netconn *pxNetCon )
104 static char cDynamicPage[webMAX_PAGE_SIZE], cPageHits[11];
105 struct netbuf *pxRxBuffer;
107 unsigned short usLength;
108 static unsigned long ulPageHits = 0;
110 /* We expect to immediately get data. */
111 pxRxBuffer = netconn_recv( pxNetCon );
113 if( pxRxBuffer != NULL )
115 /* Where is the data? */
116 netbuf_data( pxRxBuffer, ( void * )&pcRxString, &usLength );
118 /* Is this a GET? We don't handle anything else. */
119 if( !strncmp( pcRxString, "GET", 3 ) )
121 pcRxString = cDynamicPage;
123 /* Update the hit count. */
125 sprintf( cPageHits, "%d", (int)ulPageHits );
127 /* Write out the HTTP OK header. */
128 netconn_write( pxNetCon, webHTTP_OK, ( u16_t ) strlen( webHTTP_OK ), NETCONN_COPY );
130 /* Generate the dynamic page...
132 ... First the page header. */
133 strcpy( cDynamicPage, webHTML_START );
134 /* ... Then the hit count... */
135 strcat( cDynamicPage, cPageHits );
137 strcat( cDynamicPage,
138 "<p><pre>Task State Priority Stack #<br>************************************************<br>" );
139 /* ... Then the list of tasks and their status... */
140 vTaskList( cDynamicPage + strlen( cDynamicPage ) );
142 /* ... Finally the page footer. */
143 strcat( cDynamicPage, webHTML_END );
145 /* Write out the dynamically generated page. */
146 netconn_write( pxNetCon, cDynamicPage, ( u16_t ) strlen( cDynamicPage ), NETCONN_COPY );
148 netbuf_delete( pxRxBuffer );
150 netconn_close( pxNetCon );
153 /*------------------------------------------------------------*/
155 void vlwIPInit( void )
157 /* Initialize lwIP and its interface layer. */
158 tcpip_init( NULL, NULL );
161 /*------------------------------------------------------------*/
163 void vBasicWEBServer( void *pvParameters )
165 struct netconn *pxHTTPListener, *pxNewConnection;
166 struct ip_addr xIpAddr, xNetMast, xGateway;
167 static struct netif fec523x_if;
168 extern err_t ethernetif_init(struct netif *netif);
170 /* Parameters are not used - suppress compiler error. */
171 ( void )pvParameters;
175 /* Create and configure the FEC interface. */
176 IP4_ADDR( &xIpAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
177 IP4_ADDR( &xNetMast, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
178 IP4_ADDR( &xGateway, configGW_ADDR0, configGW_ADDR1, configGW_ADDR2, configGW_ADDR3 );
179 netif_add( &fec523x_if, &xIpAddr, &xNetMast, &xGateway, NULL, ethernetif_init, tcpip_input );
181 /* make it the default interface */
182 netif_set_default( &fec523x_if );
185 netif_set_up( &fec523x_if );
187 /* Create a new tcp connection handle */
188 pxHTTPListener = netconn_new( NETCONN_TCP );
189 netconn_bind( pxHTTPListener, NULL, webHTTP_PORT );
190 netconn_listen( pxHTTPListener );
195 /* Wait for connection. */
196 pxNewConnection = netconn_accept( pxHTTPListener );
198 if( pxNewConnection != NULL )
200 /* Service connection. */
201 vProcessConnection( pxNewConnection );
202 while( netconn_delete( pxNewConnection ) != ERR_OK )
204 vTaskDelay( webSHORT_DELAY );