/*
* FreeRTOS Kernel V10.4.0
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
/*
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 \
"\
\
\
\
\r\n\r\nPage Hits = "
#define webHTML_END \
"\r\n" \
"\r\n" \
"\r\n" \
""
#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 char cDynamicPage[webMAX_PAGE_SIZE], cPageHits[11];
struct netbuf *pxRxBuffer;
char *pcRxString;
unsigned short usLength;
static unsigned long 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,
"Task State Priority Stack #
************************************************
" );
/* ... Then the list of tasks and their status... */
vTaskList( 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 );
}
}
}
}