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