149 lines
4.6 KiB
C
149 lines
4.6 KiB
C
/*
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* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
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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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* This file is part of the Contiki operating system.
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*/
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/**
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* \file
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* Erbium (Er) CoAP client example.
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "contiki.h"
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#include "contiki-net.h"
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#include "coap-engine.h"
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#include "coap-blocking-api.h"
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#include "dev/button-sensor.h"
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/* Log configuration */
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#include "coap-log.h"
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#define LOG_MODULE "client"
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#define LOG_LEVEL LOG_LEVEL_COAP
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/* FIXME: This server address is hard-coded for Cooja and link-local for unconnected border router. */
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#define SERVER_EP "coap://[fe80::212:7402:0002:0202]"
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#define TOGGLE_INTERVAL 10
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PROCESS(er_example_client, "Erbium Example Client");
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AUTOSTART_PROCESSES(&er_example_client);
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static struct etimer et;
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/* Example URIs that can be queried. */
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#define NUMBER_OF_URLS 4
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/* leading and ending slashes only for demo purposes, get cropped automatically when setting the Uri-Path */
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char *service_urls[NUMBER_OF_URLS] =
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{ ".well-known/core", "/actuators/toggle", "battery/", "error/in//path" };
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#if PLATFORM_HAS_BUTTON
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static int uri_switch = 0;
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#endif
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/* This function is will be passed to COAP_BLOCKING_REQUEST() to handle responses. */
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void
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client_chunk_handler(coap_message_t *response)
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{
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const uint8_t *chunk;
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int len = coap_get_payload(response, &chunk);
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printf("|%.*s", len, (char *)chunk);
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}
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PROCESS_THREAD(er_example_client, ev, data)
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{
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coap_endpoint_t server_ep;
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PROCESS_BEGIN();
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static coap_message_t request[1]; /* This way the packet can be treated as pointer as usual. */
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coap_endpoint_parse(SERVER_EP, strlen(SERVER_EP), &server_ep);
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/* receives all CoAP messages */
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coap_engine_init();
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etimer_set(&et, TOGGLE_INTERVAL * CLOCK_SECOND);
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#if PLATFORM_HAS_BUTTON
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SENSORS_ACTIVATE(button_sensor);
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printf("Press a button to request %s\n", service_urls[uri_switch]);
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#endif
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while(1) {
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PROCESS_YIELD();
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if(etimer_expired(&et)) {
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printf("--Toggle timer--\n");
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/* prepare request, TID is set by COAP_BLOCKING_REQUEST() */
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coap_init_message(request, COAP_TYPE_CON, COAP_POST, 0);
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coap_set_header_uri_path(request, service_urls[1]);
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const char msg[] = "Toggle!";
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coap_set_payload(request, (uint8_t *)msg, sizeof(msg) - 1);
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LOG_INFO_COAP_EP(&server_ep);
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LOG_INFO_("\n");
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COAP_BLOCKING_REQUEST(&server_ep, request, client_chunk_handler);
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printf("\n--Done--\n");
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etimer_reset(&et);
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#if PLATFORM_HAS_BUTTON
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} else if(ev == sensors_event && data == &button_sensor) {
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/* send a request to notify the end of the process */
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coap_init_message(request, COAP_TYPE_CON, COAP_GET, 0);
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coap_set_header_uri_path(request, service_urls[uri_switch]);
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printf("--Requesting %s--\n", service_urls[uri_switch]);
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LOG_INFO_COAP_EP(&server_ep);
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LOG_INFO_("\n");
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COAP_BLOCKING_REQUEST(&server_ep, request,
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client_chunk_handler);
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printf("\n--Done--\n");
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uri_switch = (uri_switch + 1) % NUMBER_OF_URLS;
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#endif
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}
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}
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PROCESS_END();
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}
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