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
40 + Changed the page returned by the lwIP WEB server demo to display the
41 task status table rather than the TCP/IP statistics.
45 /* Standard includes. */
49 /* Scheduler includes. */
56 #include "SAM7_EMAC.h"
60 #include "lwip/tcpip.h"
61 #include "lwip/memp.h"
62 #include "lwip/stats.h"
63 #include "netif/loopif.h"
65 /* The size of the buffer in which the dynamic WEB page is created. */
66 #define webMAX_PAGE_SIZE 2048
68 /* Standard GET response. */
69 #define webHTTP_OK "HTTP/1.0 200 OK\r\nContent-type: text/html\r\n\r\n"
71 /* The port on which we listen. */
72 #define webHTTP_PORT ( 80 )
74 /* Delay on close error. */
75 #define webSHORT_DELAY ( 10 )
77 /* Format of the dynamic page that is returned on each connection. */
78 #define webHTML_START \
82 <BODY onLoad=\"window.setTimeout("location.href='index.html'",1000)\"bgcolor=\"#CCCCff\">\
90 /*------------------------------------------------------------*/
93 * Process an incoming connection on port 80.
95 * This simply checks to see if the incoming data contains a GET request, and
96 * if so sends back a single dynamically created page. The connection is then
97 * closed. A more complete implementation could create a task for each
100 static void vProcessConnection( struct netconn *pxNetCon );
102 /*------------------------------------------------------------*/
104 static void vProcessConnection( struct netconn *pxNetCon )
106 static char cDynamicPage[ webMAX_PAGE_SIZE ], cPageHits[ 11 ];
107 struct netbuf *pxRxBuffer;
109 unsigned short usLength;
110 static unsigned long ulPageHits = 0;
112 /* We expect to immediately get data. */
113 pxRxBuffer = netconn_recv( pxNetCon );
115 if( pxRxBuffer != NULL )
117 /* Where is the data? */
118 netbuf_data( pxRxBuffer, ( void * ) &pcRxString, &usLength );
120 /* Is this a GET? We don't handle anything else. */
121 if( !strncmp( pcRxString, "GET", 3 ) )
123 pcRxString = cDynamicPage;
125 /* Update the hit count. */
127 sprintf( cPageHits, "%lu", ulPageHits );
129 /* Write out the HTTP OK header. */
130 netconn_write(pxNetCon, webHTTP_OK, (u16_t)strlen( webHTTP_OK ), NETCONN_COPY );
132 /* Generate the dynamic page...
134 ... First the page header. */
135 strcpy( cDynamicPage, webHTML_START );
136 /* ... Then the hit count... */
137 strcat( cDynamicPage, cPageHits );
138 strcat( cDynamicPage, "<p><pre>Task State Priority Stack #<br>************************************************<br>" );
139 /* ... Then the list of tasks and their status... */
140 vTaskList( cDynamicPage + strlen( cDynamicPage ) );
141 /* ... Finally the page footer. */
142 strcat( cDynamicPage, webHTML_END );
144 /* Write out the dynamically generated page. */
145 netconn_write(pxNetCon, cDynamicPage, (u16_t)strlen( cDynamicPage ), NETCONN_COPY );
148 netbuf_delete( pxRxBuffer );
151 netconn_close( pxNetCon );
153 /*------------------------------------------------------------*/
155 void vlwIPInit( void )
157 /* Initialize lwIP and its interface layer. */
164 tcpip_init( NULL, NULL );
166 /*------------------------------------------------------------*/
168 void vBasicWEBServer( void *pvParameters )
170 struct netconn *pxHTTPListener, *pxNewConnection;
171 struct ip_addr xIpAddr, xNetMast, xGateway;
172 extern err_t ethernetif_init( struct netif *netif );
173 static struct netif EMAC_if;
175 /* Parameters are not used - suppress compiler error. */
176 ( void ) pvParameters;
179 /* Create and configure the EMAC interface. */
180 IP4_ADDR(&xIpAddr,emacIPADDR0,emacIPADDR1,emacIPADDR2,emacIPADDR3);
181 IP4_ADDR(&xNetMast,emacNET_MASK0,emacNET_MASK1,emacNET_MASK2,emacNET_MASK3);
182 IP4_ADDR(&xGateway,emacGATEWAY_ADDR0,emacGATEWAY_ADDR1,emacGATEWAY_ADDR2,emacGATEWAY_ADDR3);
183 netif_add(&EMAC_if, &xIpAddr, &xNetMast, &xGateway, NULL, ethernetif_init, tcpip_input);
185 /* make it the default interface */
186 netif_set_default(&EMAC_if);
189 netif_set_up(&EMAC_if);
191 /* Create a new tcp connection handle */
193 pxHTTPListener = netconn_new( NETCONN_TCP );
194 netconn_bind(pxHTTPListener, NULL, webHTTP_PORT );
195 netconn_listen( pxHTTPListener );
200 /* Wait for connection. */
201 pxNewConnection = netconn_accept(pxHTTPListener);
203 if(pxNewConnection != NULL)
205 /* Service connection. */
206 vProcessConnection( pxNewConnection );
207 while( netconn_delete( pxNewConnection ) != ERR_OK )
209 vTaskDelay( webSHORT_DELAY );