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/******************************************************************************
Filename: udpapp.h
Description: UDP 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 07/11/2009 Initial version
*****************************************************************************/
#include "uip.h"
#include <string.h>
#include "udpapp.h"
#include "config.h"
#define STATE_INIT 0
#define STATE_LISTENING 1
#define STATE_HELLO_RECEIVED 2
#define STATE_NAME_RECEIVED 3
static struct udpapp_state s;
void dummy_app_appcall(void)
{
}
void udpapp_init(void)
{
uip_ipaddr_t addr;
struct uip_udp_conn *c;
uip_ipaddr(&addr, 192,168,1,23);
c = uip_udp_new(&addr, HTONS(0));
if(c != NULL) {
uip_udp_bind(c, HTONS(12344));
}
s.state = STATE_INIT;
PT_INIT(&s.pt);
}
static unsigned char parse_msg(void)
{
if (memcmp(uip_appdata, "Hello", 5) == 0) {
return 1;
}
return 0;
}
static void send_request(void)
{
char str[] = "Hello. What is your name?\n";
memcpy(uip_appdata, str, strlen(str));
uip_send(uip_appdata, strlen(str));
}
static void send_response(void)
{
char i = 0;
char str[] = "Hello ";
while ( ( ((char*)uip_appdata)[i] != '\n') && i < 9) {
s.inputbuf[i] = ((char*)uip_appdata)[i];
i++;
}
s.inputbuf[i] = '\n';
memcpy(uip_appdata, str, 6);
memcpy(uip_appdata+6, s.inputbuf, i+1);
uip_send(uip_appdata, i+7);
}
static PT_THREAD(handle_connection(void))
{
PT_BEGIN(&s.pt);
s.state = STATE_LISTENING;
do {
PT_WAIT_UNTIL(&s.pt, uip_newdata());
if(uip_newdata() && parse_msg()) {
s.state = STATE_HELLO_RECEIVED;
uip_flags &= (~UIP_NEWDATA);
break;
}
} while(s.state != STATE_HELLO_RECEIVED);
do {
send_request();
PT_WAIT_UNTIL(&s.pt, uip_newdata());
if(uip_newdata()) {
s.state = STATE_NAME_RECEIVED;
uip_flags &= (~UIP_NEWDATA);
break;
}
} while(s.state != STATE_NAME_RECEIVED);
send_response();
s.state = STATE_INIT;
PT_END(&s.pt);
}
void udpapp_appcall(void)
{
handle_connection();
}
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