133 lines
5.4 KiB
C
133 lines
5.4 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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* ETSI Plugtest resource
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* \author
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* Matthias Kovatsch <kovatsch@inf.ethz.ch>
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*/
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#include <string.h>
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#include "rest-engine.h"
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#include "er-coap.h"
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#include "er-coap-transactions.h"
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#include "er-coap-separate.h"
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#include "er-plugtest.h"
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static void res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
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static void res_resume_handler(void);
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PERIODIC_RESOURCE(res_plugtest_separate,
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"title=\"Resource which cannot be served immediately and which cannot be acknowledged in a piggy-backed way\"",
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res_get_handler,
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NULL,
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NULL,
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NULL,
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3 * CLOCK_SECOND,
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res_resume_handler);
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/* A structure to store the required information */
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typedef struct application_separate_store {
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/* Provided by Erbium to store generic request information such as remote address and token. */
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coap_separate_t request_metadata;
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/* Add fields for addition information to be stored for finalizing, e.g.: */
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char buffer[MAX_PLUGFEST_PAYLOAD];
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} application_separate_store_t;
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static uint8_t separate_active = 0;
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static application_separate_store_t separate_store[1];
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void
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res_get_handler(void *request, void *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
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{
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coap_packet_t *const coap_req = (coap_packet_t *)request;
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PRINTF("/separate ");
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if(separate_active) {
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PRINTF("REJECTED ");
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coap_separate_reject();
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} else {
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PRINTF("STORED ");
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separate_active = 1;
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/* Take over and skip response by engine. */
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coap_separate_accept(request, &separate_store->request_metadata);
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/* Be aware to respect the Block2 option, which is also stored in the coap_separate_t. */
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snprintf(separate_store->buffer, MAX_PLUGFEST_PAYLOAD,
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"Type: %u\nCode: %u\nMID: %u", coap_req->type, coap_req->code,
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coap_req->mid);
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}
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PRINTF("(%s %u)\n", coap_req->type == COAP_TYPE_CON ? "CON" : "NON", coap_req->mid);
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}
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static void
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res_resume_handler()
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{
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if(separate_active) {
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PRINTF("/separate ");
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coap_transaction_t *transaction = NULL;
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if((transaction = coap_new_transaction(separate_store->request_metadata.mid,
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&separate_store->request_metadata.addr,
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separate_store->request_metadata.port))) {
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PRINTF(
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"RESPONSE (%s %u)\n", separate_store->request_metadata.type == COAP_TYPE_CON ? "CON" : "NON", separate_store->request_metadata.mid);
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coap_packet_t response[1]; /* This way the packet can be treated as pointer as usual. */
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/* Restore the request information for the response. */
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coap_separate_resume(response, &separate_store->request_metadata, CONTENT_2_05);
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REST.set_header_content_type(response, REST.type.TEXT_PLAIN);
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coap_set_payload(response, separate_store->buffer,
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strlen(separate_store->buffer));
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/*
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* Be aware to respect the Block2 option, which is also stored in the coap_separate_t.
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* As it is a critical option, this example resource pretends to handle it for compliance.
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*/
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coap_set_header_block2(response,
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separate_store->request_metadata.block2_num, 0,
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separate_store->request_metadata.block2_size);
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/* Warning: No check for serialization error. */
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transaction->packet_len = coap_serialize_message(response,
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transaction->packet);
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coap_send_transaction(transaction);
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/* The engine will clear the transaction (right after send for NON, after acked for CON). */
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separate_active = 0;
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} else {
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PRINTF("ERROR (transaction)\n");
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}
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} /* if (separate_active) */
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}
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