nes-proj/examples/coap/coap-plugtest-server/resources/res-plugtest-validate.c

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/*
* Copyright (c) 2013, Institute for Pervasive Computing, ETH Zurich
* 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.
*
* This file is part of the Contiki operating system.
*/
/**
* \file
* ETSI Plugtest resource
* \author
* Matthias Kovatsch <kovatsch@inf.ethz.ch>
*/
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#include <stdio.h>
#include <string.h>
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#include "coap-engine.h"
#include "coap.h"
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#include "random.h"
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "Plugtest"
#define LOG_LEVEL LOG_LEVEL_PLUGTEST
static void res_get_handler(coap_message_t *request, coap_message_t *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
static void res_put_handler(coap_message_t *request, coap_message_t *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset);
RESOURCE(res_plugtest_validate,
"title=\"Validation test resource\"",
res_get_handler,
NULL,
res_put_handler,
NULL);
static uint8_t validate_etag[8] = { 0 };
static uint8_t validate_etag_len = 1;
static uint8_t validate_change = 1;
static const uint8_t *bytes = NULL;
static size_t len = 0;
static void
validate_update_etag()
{
int i;
validate_etag_len = (random_rand() % 8) + 1;
for(i = 0; i < validate_etag_len; ++i) {
validate_etag[i] = random_rand();
}
validate_change = 0;
LOG_DBG("### SERVER ACTION ### Changed ETag %u [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n",
validate_etag_len, validate_etag[0], validate_etag[1], validate_etag[2], validate_etag[3], validate_etag[4], validate_etag[5], validate_etag[6], validate_etag[7]);
}
static void
res_get_handler(coap_message_t *request, coap_message_t *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
coap_message_t *const coap_req = (coap_message_t *)request;
if(validate_change) {
validate_update_etag();
}
LOG_DBG("/validate GET");
LOG_DBG_("(%s %u)\n", coap_req->type == COAP_TYPE_CON ? "CON" : "NON", coap_req->mid);
if((len = coap_get_header_etag(request, &bytes)) > 0
&& len == validate_etag_len && memcmp(validate_etag, bytes, len) == 0) {
LOG_DBG("validate\n");
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coap_set_status_code(response, VALID_2_03);
coap_set_header_etag(response, validate_etag, validate_etag_len);
validate_change = 1;
LOG_DBG("### SERVER ACTION ### Resouce will change\n");
} else {
/* Code 2.05 CONTENT is default. */
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coap_set_header_content_format(response, TEXT_PLAIN);
coap_set_header_etag(response, validate_etag, validate_etag_len);
coap_set_header_max_age(response, 30);
coap_set_payload(
response,
buffer,
snprintf((char *)buffer, MAX_PLUGFEST_PAYLOAD,
"Type: %u\nCode: %u\nMID: %u", coap_req->type, coap_req->code,
coap_req->mid));
}
}
static void
res_put_handler(coap_message_t *request, coap_message_t *response, uint8_t *buffer, uint16_t preferred_size, int32_t *offset)
{
coap_message_t *const coap_req = (coap_message_t *)request;
LOG_DBG("/validate PUT ");
LOG_DBG_("(%s %u)\n", coap_req->type == COAP_TYPE_CON ? "CON" : "NON", coap_req->mid);
if(((len = coap_get_header_if_match(request, &bytes)) > 0
&& (len == validate_etag_len
&& memcmp(validate_etag, bytes, len) == 0))
|| len == 0) {
validate_update_etag();
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coap_set_header_etag(response, validate_etag, validate_etag_len);
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coap_set_status_code(response, CHANGED_2_04);
if(len > 0) {
validate_change = 1;
LOG_DBG("### SERVER ACTION ### Resouce will change\n");
}
} else {
LOG_DBG(
"Check %u/%u\n [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n [0x%02X%02X%02X%02X%02X%02X%02X%02X]\n",
(unsigned)len,
(unsigned)validate_etag_len,
bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7],
validate_etag[0], validate_etag[1], validate_etag[2], validate_etag[3], validate_etag[4], validate_etag[5], validate_etag[6], validate_etag[7]);
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coap_set_status_code(response, PRECONDITION_FAILED_4_12);
}
}