1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
FreeRTOS.org V5.1.2 - 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.
***************************************************************************
***************************************************************************
* *
* Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation *
* *
* This is a concise, step by step, 'hands on' guide that describes both *
* general multitasking concepts and FreeRTOS specifics. It presents and *
* explains numerous examples that are written using the FreeRTOS API. *
* Full source code for all the examples is provided in an accompanying *
* .zip file. *
* *
***************************************************************************
***************************************************************************
Please ensure to read the configuration and relevant port sections of the
online documentation.
http://www.FreeRTOS.org - Documentation, latest information, license and
contact details.
http://www.SafeRTOS.com - A version that is certified for use in safety
critical systems.
http://www.OpenRTOS.com - Commercial support, development, porting,
licensing and training services.
*/
/*
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 ------------------------------- */
/* ------------------------ FreeRTOS includes ----------------------------- */
#include "FreeRTOS.h"
#include "task.h"
#include "semphr.h"
/* ------------------------ lwIP includes --------------------------------- */
#include "lwip/api.h"
#include "lwip/tcpip.h"
#include "lwip/ip.h"
#include "lwip/memp.h"
#include "lwip/stats.h"
#include "netif/loopif.h"
/* ------------------------ Project includes ------------------------------ */
#include "common.h"
#include "HTTPDemo.h"
/* ------------------------ Defines --------------------------------------- */
/* The size of the buffer in which the dynamic WEB page is created. */
#define webMAX_PAGE_SIZE ( 1024 ) /*FSL: buffer containing array*/
/* 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("location.href='index.html'",1000)\"bgcolor=\"#CCCCff\">\
\r\n\r\nPage Hits = "
#define webHTML_END \
"\r\n" \
"</pre>\r\n" \
"</BODY>\r\n" \
"</html>"
#if INCLUDE_uxTaskGetStackHighWaterMark
static volatile unsigned portBASE_TYPE uxHighWaterMark_web = 0;
#endif
/* ------------------------ 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 void vProcessConnection( 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, "%d", (int)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 );
}
/*------------------------------------------------------------*/
void vlwIPInit( void )
{
/* Initialize lwIP and its interface layer. */
tcpip_init( NULL, NULL );
}
/*------------------------------------------------------------*/
void vBasicWEBServer( void *pvParameters )
{
struct netconn *pxHTTPListener, *pxNewConnection;
struct ip_addr xIpAddr, xNetMast, xGateway;
static struct netif fec523x_if;
extern err_t ethernetif_init(struct netif *netif);
/* Parameters are not used - suppress compiler error. */
( void )pvParameters;
vlwIPInit();
/* Create and configure the FEC interface. */
IP4_ADDR( &xIpAddr, configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 );
IP4_ADDR( &xNetMast, configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 );
IP4_ADDR( &xGateway, configGW_ADDR0, configGW_ADDR1, configGW_ADDR2, configGW_ADDR3 );
netif_add( &fec523x_if, &xIpAddr, &xNetMast, &xGateway, NULL, ethernetif_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 );
}
}
}
}
|
