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/******************************************************************************
Filename: webserver.h
Description: Webserver app for the WiShield 1.0
******************************************************************************
TCP/IP stack and driver for the WiShield 1.0 wireless devices
Copyright(c) 2009 Async Labs Inc. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the terms of version 2 of the GNU General Public License as
published by the Free Software Foundation.
This program 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
this program; if not, write to the Free Software Foundation, Inc., 59
Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Contact Information:
<asynclabs@asynclabs.com>
Author Date Comment
---------------------------------------------------------------
AsyncLabs 05/29/2009 Initial version
*****************************************************************************/
#include "uip.h"
#include <string.h>
#include "webserver.h"
#include "config.h"
static int handle_connection(struct webserver_state *s);
void webserver_init(void)
{
uip_listen(HTONS(80));
}
void webserver_appcall(void)
{
struct webserver_state *s = &(uip_conn->appstate);
if(uip_connected()) {
PSOCK_INIT(&s->p, s->inputbuf, sizeof(s->inputbuf));
}
handle_connection(s);
}
#define ISO_nl 0x0a
#define ISO_space 0x20
#define ISO_slash 0x2f
const char http_get[5] = {0x47, 0x45, 0x54, 0x20, }; /* "GET " */
unsigned short fill_buf(void* blk)
{
unsigned short webpage_len;
webpage_len = (strlen_P(webpage)>uip_mss())?uip_mss():strlen_P(webpage);
memcpy_P(uip_appdata, webpage, webpage_len);
return webpage_len;
}
static int handle_connection(struct webserver_state *s)
{
PSOCK_BEGIN(&s->p);
// the incoming GET request will have the following format:
// GET / HTTP/1.1 ....
// we have to parse this string to determine the resource being requested
// if the requested resource is not the root webpage ('/') then,
// GET /<resource name> HTTP/1.1 ....
// we should parse the specific resource and react appropriately
// read incoming data until we read a space character
PSOCK_READTO(&s->p, ISO_space);
// parse the data to determine if it was a GET request
if(strncmp(s->inputbuf, http_get, 4) != 0) {
PSOCK_CLOSE_EXIT(&s->p);
}
// continue reading until the next space character
PSOCK_READTO(&s->p, ISO_space);
// determine the requested resource
// in this case, we check if the request was for the '/' root page
// AKA index.html
if(s->inputbuf[0] != ISO_slash) {
// request for unknown webpage, close and exit
PSOCK_CLOSE_EXIT(&s->p);
}
if(s->inputbuf[1] != ISO_space) {
// request for unavailable resource
// not supported, modify to add support for additional resources
PSOCK_CLOSE_EXIT(&s->p);
}
//PSOCK_SEND_STR(&s->p, "HTTP/1.1 200 OK\r\n");
//PSOCK_SEND_STR(&s->p, "Content-Type: text/html\r\n");
//PSOCK_SEND_STR(&s->p, "\r\n");
//PSOCK_SEND_STR(&s->p, "Hello World, I am WiShield");
//PSOCK_SEND_STR(&s->p, "<center><h1>Hello World!! I am WiShield</h1></center>");
PSOCK_GENERATOR_SEND(&s->p, fill_buf, 0);
PSOCK_CLOSE(&s->p);
PSOCK_END(&s->p);
}
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