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Better HTTP GET parsing in the Webserver demo, add application polling.

Browse Source
pull/1469/head
Dean Camera 15 years ago
parent e8b8ed2bad
commit 97f7cd947b
7 changed files with 52 additions and 46 deletions
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1
Projects/Benito/Benito.h
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@ -40,7 +40,6 @@
#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <avr/power.h>
#include "Descriptors.h"
#include "Lib/RingBuff.h"

54
Projects/Webserver/Lib/HTTPServerApp.c
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@ -112,9 +112,10 @@ void WebserverApp_Callback(void)
}
else if (uip_connected())
{
/* New connection - initialize connection state and data pointer to the appropriate HTTP header */
/* New connection - initialize connection state values */
AppState->PrevState = WEBSERVER_STATE_OpenRequestedFile;
AppState->CurrentState = WEBSERVER_STATE_OpenRequestedFile;
AppState->FileOpen = false;
}
else if (uip_rexmit())
{
@ -128,31 +129,25 @@ void WebserverApp_Callback(void)
/* Wait for the packet containing the request header */
if (uip_newdata())
{
char* RequestToken = strtok(AppData, " ");
/* Must be a GET request, abort otherwise */
if (strncmp(AppData, "GET ", (sizeof("GET ") - 1)) != 0)
if (strcmp(RequestToken, "GET") != 0)
{
uip_abort();
break;
}
/* Copy over the requested filename from the GET request as all-lowercase */
for (uint8_t i = 0; i < (sizeof(AppState->FileName) - 1); i++)
{
AppState->FileName[i] = tolower(AppData[sizeof("GET ") + i]);
if (AppState->FileName[i] == ' ')
{
AppState->FileName[i] = 0x00;
break;
}
}
/* Ensure requested filename is null-terminated */
AppState->FileName[(sizeof(AppState->FileName) - 1)] = 0x00;
char* RequestedFileName = strtok(NULL, " ");
/* If no filename specified, assume the default of index.htm */
if (AppState->FileName[0] == 0x00)
/* If the requested filename has more that just the leading '/' path in it, copy it over */
if (strlen(RequestedFileName) > 1)
strncpy(AppState->FileName, &RequestedFileName[1], (sizeof(AppState->FileName) - 1));
else
strcpy(AppState->FileName, "index.htm");
/* Ensure filename is null-terminated */
AppState->FileName[(sizeof(AppState->FileName) - 1)] = 0x00;
/* Try to open the file from the Dataflash disk */
AppState->FileOpen = (f_open(&AppState->FileHandle, AppState->FileName, FA_OPEN_EXISTING | FA_READ) == FR_OK);
@ -176,8 +171,6 @@ void WebserverApp_Callback(void)
strncpy_P(AppData, HTTP404Header, AppDataSize);
}
uip_send(AppData, AppDataSize);
AppState->PrevState = WEBSERVER_STATE_SendResponseHeader;
AppState->CurrentState = WEBSERVER_STATE_SendMIMETypeHeader;
break;
@ -213,8 +206,6 @@ void WebserverApp_Callback(void)
/* Add the end-of line terminator and end-of-headers terminator after the MIME type */
strncpy(&AppData[AppDataSize], "\r\n\r\n", sizeof("\r\n\r\n"));
AppDataSize += (sizeof("\r\n\r\n") - 1);
uip_send(AppData, AppDataSize);
}
AppState->PrevState = WEBSERVER_STATE_SendMIMETypeHeader;
@ -234,25 +225,26 @@ void WebserverApp_Callback(void)
uint16_t MaxSegSize = uip_mss();
/* Return file pointer to the last ACKed position if retransmitting */
/* Return file pointer to the last ACKed position */
f_lseek(&AppState->FileHandle, AppState->CurrentFilePos);
/* Read the next chunk of data from the open file */
f_read(&AppState->FileHandle, AppData, MaxSegSize, &AppDataSize);
AppState->FileOpen = (AppDataSize > 0);
/* If data was read, send it to the client */
if (AppDataSize)
/* If we are not re-transmitting a lost segment, advance file position */
if (uip_acked() && !(uip_rexmit()))
{
/* If we are not re-transmitting a lost segment, advance file position */
if (!(uip_rexmit()))
AppState->CurrentFilePos += AppDataSize;
uip_send(AppData, AppDataSize);
AppState->FileOpen = (AppDataSize > 0);
AppState->CurrentFilePos += AppDataSize;
}
/* Stay in the SendData state if retransmission is required until all data sent */
AppState->PrevState = WEBSERVER_STATE_SendData;
break;
}
/* If data has been loaded into the application buffer by the server, send it to the client */
if (AppDataSize)
uip_send(AppData, AppDataSize);
}

3
Projects/Webserver/Lib/HTTPServerApp.h
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@ -39,9 +39,6 @@
/* Includes: */
#include <avr/pgmspace.h>
#include <string.h>
#include <ctype.h>
#include <LUFA/Version.h>
#include <uip.h>
#include <ff.h>

29
Projects/Webserver/Lib/uIPManagement.c
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@ -52,7 +52,7 @@ void uIPManagement_Init(void)
{
/* uIP Timing Initialization */
clock_init();
timer_set(&ConnectionTimer, CLOCK_SECOND / 100);
timer_set(&ConnectionTimer, CLOCK_SECOND / 2);
timer_set(&ARPTimer, CLOCK_SECOND * 10);
/* uIP Stack Initialization */
@ -97,13 +97,13 @@ static void uIPManagement_ProcessIncommingPacket(void)
LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
/* Read the incomming packet straight into the UIP packet buffer */
RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], &uip_len);
RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, uip_buf, &uip_len);
if (uip_len > 0)
{
bool PacketHandled = true;
struct uip_eth_hdr* EthernetHeader = (struct uip_eth_hdr*)&uip_buf[0];
struct uip_eth_hdr* EthernetHeader = (struct uip_eth_hdr*)uip_buf;
if (EthernetHeader->type == HTONS(UIP_ETHTYPE_IP))
{
/* Filter packet by MAC destination */
@ -128,7 +128,7 @@ static void uIPManagement_ProcessIncommingPacket(void)
/* If a response was generated, send it */
if ((uip_len > 0) && PacketHandled)
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], uip_len);
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
}
LEDs_SetAllLEDs(LEDMASK_USB_READY);
@ -138,7 +138,22 @@ static void uIPManagement_ProcessIncommingPacket(void)
/** Manages the currently open network connections, including TCP and (if enabled) UDP. */
static void uIPManagement_ManageConnections(void)
{
/* Manage open connections */
/* Poll TCP connections for more data to send back to the host */
for (uint8_t i = 0; i < UIP_CONNS; i++)
{
uip_poll_conn(&uip_conns[i]);
/* If a response was generated, send it */
if (uip_len > 0)
{
/* Add destination MAC to outgoing packet */
uip_arp_out();
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
}
}
/* Manage open connections for timeouts */
if (timer_expired(&ConnectionTimer))
{
timer_reset(&ConnectionTimer);
@ -156,7 +171,7 @@ static void uIPManagement_ManageConnections(void)
/* Add destination MAC to outgoing packet */
uip_arp_out();
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], uip_len);
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
}
}
@ -172,7 +187,7 @@ static void uIPManagement_ManageConnections(void)
/* Add destination MAC to outgoing packet */
uip_arp_out();
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], uip_len);
RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, uip_buf, uip_len);
}
}
#endif

2
Projects/Webserver/Lib/uip/conf/apps-conf.h
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@ -9,7 +9,7 @@
uint8_t CurrentState;
FIL FileHandle;
char FileName[13];
char FileName[50];
bool FileOpen;
uint32_t CurrentFilePos;
} uip_tcp_appstate_t;

6
Projects/Webserver/Webserver.c
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@ -47,8 +47,10 @@ int main(void)
for (;;)
{
USBDeviceMode_USBTask();
USBHostMode_USBTask();
if (USB_CurrentMode == USB_MODE_HOST)
USBHostMode_USBTask();
else
USBDeviceMode_USBTask();
USB_USBTask();
}

3
Projects/Webserver/Webserver.txt
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@ -54,7 +54,8 @@
*
* To use this project, plug the USB AVR into a computer, so that it enumerates as a standard Mass Storage device. Load
* HTML files onto the disk, so that they can be served out to clients -- the default file to serve should be called
* <i>index.htm</i>. Filenames must be in 8.3 format for them to be retrieved correctly by the webserver.
* <i>index.htm</i>. Filenames must be in 8.3 format for them to be retrieved correctly by the webserver, and the total
* requested file path must be equal to or less than 50 characters.
*
* When attached to a RNDIS class device, such as a USB (desktop) modem, the system will enumerate the device, set the
* appropriate parameters needed for connectivity and begin listening for new HTTP connections on port 80. The device IP,

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