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Diffstat (limited to 'Libraries/WiShield/examples/WebServer/webserver.c')
| -rw-r--r-- | Libraries/WiShield/examples/WebServer/webserver.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/Libraries/WiShield/examples/WebServer/webserver.c b/Libraries/WiShield/examples/WebServer/webserver.c new file mode 100644 index 0000000..68c293e --- /dev/null +++ b/Libraries/WiShield/examples/WebServer/webserver.c @@ -0,0 +1,118 @@ + +/****************************************************************************** + + 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); +} |