137 lines
4.7 KiB
C
137 lines
4.7 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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* CoAP implementation for the REST Engine.
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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*/
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/**
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* \addtogroup coap
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* @{
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*/
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#include "coap-engine.h"
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#include "coap-blocking-api.h"
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#include "sys/cc.h"
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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 <inttypes.h>
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/* Log configuration */
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#include "coap-log.h"
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#define LOG_MODULE "coap-blocking-api"
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#define LOG_LEVEL LOG_LEVEL_COAP
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/*---------------------------------------------------------------------------*/
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/*- Client Part -------------------------------------------------------------*/
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/*---------------------------------------------------------------------------*/
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void
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coap_blocking_request_callback(void *callback_data, coap_message_t *response)
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{
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coap_request_state_t *state = (coap_request_state_t *)callback_data;
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state->response = response;
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process_poll(state->process);
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}
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/*---------------------------------------------------------------------------*/
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PT_THREAD(coap_blocking_request
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(coap_request_state_t *state, process_event_t ev,
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coap_endpoint_t *remote_ep,
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coap_message_t *request,
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coap_blocking_response_handler_t request_callback))
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{
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PT_BEGIN(&state->pt);
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static uint32_t res_block;
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static uint8_t more;
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static uint8_t block_error;
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state->block_num = 0;
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state->response = NULL;
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state->process = PROCESS_CURRENT();
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more = 0;
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res_block = 0;
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block_error = 0;
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do {
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request->mid = coap_get_mid();
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if((state->transaction = coap_new_transaction(request->mid, remote_ep))) {
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state->transaction->callback = coap_blocking_request_callback;
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state->transaction->callback_data = state;
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if(state->block_num > 0) {
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coap_set_header_block2(request, state->block_num, 0,
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COAP_MAX_CHUNK_SIZE);
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}
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state->transaction->message_len = coap_serialize_message(request,
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state->
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transaction->
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message);
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coap_send_transaction(state->transaction);
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LOG_DBG("Requested #%"PRIu32" (MID %u)\n", state->block_num, request->mid);
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PT_YIELD_UNTIL(&state->pt, ev == PROCESS_EVENT_POLL);
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if(!state->response) {
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LOG_WARN("Server not responding\n");
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PT_EXIT(&state->pt);
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}
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coap_get_header_block2(state->response, &res_block, &more, NULL, NULL);
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LOG_DBG("Received #%"PRIu32"%s (%u bytes)\n", res_block, more ? "+" : "",
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state->response->payload_len);
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if(res_block == state->block_num) {
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request_callback(state->response);
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++(state->block_num);
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} else {
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LOG_WARN("WRONG BLOCK %"PRIu32"/%"PRIu32"\n",
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res_block, state->block_num);
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++block_error;
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}
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} else {
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LOG_WARN("Could not allocate transaction buffer");
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PT_EXIT(&state->pt);
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}
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} while(more && block_error < COAP_MAX_ATTEMPTS);
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PT_END(&state->pt);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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