nes-proj/examples/ipv6/sky-websense/websense-remote.c

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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
/**
* \file
* A simple example using HTTP to control and be controlled
* \author
* Niclas Finne <nfi@sics.se>
* Joakim Eriksson <joakime@sics.se>
*/
#include "contiki.h"
#include "dev/button-sensor.h"
#include "dev/leds.h"
#include "wget.h"
#include "httpd-simple.h"
#include <stdio.h>
/* The address of the server to register the services for this node */
#define SERVER "[aaaa::1]"
/* This command registers two services (/0 and /1) to turn the leds on or off */
#define REGISTER_COMMAND "/r?p=0&d=Turn%20off%20leds&p=1&d=Turn%20on%20leds"
/* The address of the other node to control */
#define OTHER_NODE "[aaaa::1]"
/* The commands to send to the other node */
#define SET_LEDS_ON "/1"
#define SET_LEDS_OFF "/0"
PROCESS(websense_remote_process, "Websense Remote");
PROCESS(webserver_nogui_process, "Web server");
PROCESS_THREAD(webserver_nogui_process, ev, data)
{
PROCESS_BEGIN();
httpd_init();
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev == tcpip_event);
httpd_appcall(data);
}
PROCESS_END();
}
AUTOSTART_PROCESSES(&websense_remote_process,&webserver_nogui_process);
/*---------------------------------------------------------------------------*/
static const char *TOP = "<html><head><title>Contiki Websense Remote</title></head><body>\n";
static const char *BOTTOM = "</body></html>\n";
/*---------------------------------------------------------------------------*/
static
PT_THREAD(handle_command(struct httpd_state *s))
{
PSOCK_BEGIN(&s->sout);
SEND_STRING(&s->sout, TOP);
if(s->filename[1] == '0') {
/* Turn off leds */
leds_off(LEDS_ALL);
SEND_STRING(&s->sout, "Turned off leds!");
} else if(s->filename[1] == '1') {
/* Turn on leds */
leds_on(LEDS_ALL);
SEND_STRING(&s->sout, "Turned on leds!");
} else {
SEND_STRING(&s->sout, "Unknown command");
}
SEND_STRING(&s->sout, BOTTOM);
PSOCK_END(&s->sout);
}
/*---------------------------------------------------------------------------*/
httpd_simple_script_t
httpd_simple_get_script(const char *name)
{
return handle_command;
}
/*---------------------------------------------------------------------------*/
static void
wget_done(int status)
{
switch(status) {
case WGET_OK:
printf("Command sent.\n");
break;
case WGET_TIMEDOUT:
printf("Command timedout.\n");
break;
case WGET_ABORTED:
printf("Connection aborted.\n");
break;
case WGET_CONNECT_FAILED:
printf("Failed to connect.\n");
break;
}
}
static const struct wget_callbacks callbacks = {
NULL, wget_done
};
static void
send_command(const char *server, const char *command)
{
int ret;
printf("Sending to [%s]: %s\n", server, command);
ret = wget_get(server, 80, command, &callbacks);
if(ret != WGET_OK) {
if(ret == WGET_ALREADY_RUNNING) {
printf("Waiting for previous command to finish.\n");
} else {
printf("Failed to send command: %u\n", ret);
}
}
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(websense_remote_process, ev, data)
{
static int mode;
static struct etimer timer;
PROCESS_BEGIN();
mode = 0;
wget_init();
SENSORS_ACTIVATE(button_sensor);
/* Give the node some time to join the network before registering
the available services. */
etimer_set(&timer, CLOCK_SECOND * 30);
while(1) {
PROCESS_WAIT_EVENT();
if(ev == sensors_event && data == &button_sensor) {
/* The button has been pressed. Send command to the other node. */
if(mode) {
/* Turn on leds */
send_command(OTHER_NODE, SET_LEDS_OFF);
} else {
send_command(OTHER_NODE, SET_LEDS_ON);
}
/* Alternate between the two commands */
mode = !mode;
} else if(ev == PROCESS_EVENT_TIMER && etimer_expired(&timer)) {
printf("Registering services\n");
send_command(SERVER, REGISTER_COMMAND);
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/