121 lines
4.2 KiB
C
121 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2014, Lars Schmertmann <SmallLars@t-online.de>.
|
|
* 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
|
|
* CoAP module for block 1 handling
|
|
* \author
|
|
* Lars Schmertmann <SmallLars@t-online.de>
|
|
*/
|
|
|
|
/**
|
|
* \addtogroup coap
|
|
* @{
|
|
*/
|
|
|
|
#include <string.h>
|
|
#include <inttypes.h>
|
|
|
|
#include "coap.h"
|
|
#include "coap-block1.h"
|
|
|
|
/* Log configuration */
|
|
#include "coap-log.h"
|
|
#define LOG_MODULE "coap"
|
|
#define LOG_LEVEL LOG_LEVEL_COAP
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
/**
|
|
* \brief Block 1 support within a coap-ressource
|
|
*
|
|
* This function will help you to use block 1. If target is null
|
|
* error handling and response configuration is active. On return
|
|
* value 0, the last block was recived, while on return value 1
|
|
* more blocks will follow. With target, len and maxlen this
|
|
* function will assemble the blocks.
|
|
*
|
|
* You can find an example in:
|
|
* examples/er-rest-example/resources/res-b1-sep-b2.c
|
|
*
|
|
* \param request Request pointer from the handler
|
|
* \param response Response pointer from the handler
|
|
* \param target Pointer to the buffer where the request payload can be assembled
|
|
* \param len Pointer to the variable, where the function stores the actual length
|
|
* \param max_len Length of the "target"-Buffer
|
|
*
|
|
* \return 0 if initialisation was successful
|
|
* -1 if initialisation failed
|
|
*/
|
|
int
|
|
coap_block1_handler(coap_message_t *request, coap_message_t *response,
|
|
uint8_t *target, size_t *len, size_t max_len)
|
|
{
|
|
const uint8_t *payload = 0;
|
|
int pay_len = coap_get_payload(request, &payload);
|
|
|
|
if(!pay_len || !payload) {
|
|
coap_status_code = BAD_REQUEST_4_00;
|
|
coap_error_message = "NoPayload";
|
|
return -1;
|
|
}
|
|
|
|
if(request->block1_offset + pay_len > max_len) {
|
|
coap_status_code = REQUEST_ENTITY_TOO_LARGE_4_13;
|
|
coap_error_message = "Message to big";
|
|
return -1;
|
|
}
|
|
|
|
if(target && len) {
|
|
memcpy(target + request->block1_offset, payload, pay_len);
|
|
*len = request->block1_offset + pay_len;
|
|
}
|
|
|
|
if(coap_is_option(request, COAP_OPTION_BLOCK1)) {
|
|
LOG_DBG("Blockwise: block 1 request: Num: %"PRIu32
|
|
", More: %u, Size: %u, Offset: %"PRIu32"\n",
|
|
request->block1_num,
|
|
request->block1_more,
|
|
request->block1_size,
|
|
request->block1_offset);
|
|
|
|
coap_set_header_block1(response, request->block1_num, request->block1_more, request->block1_size);
|
|
if(request->block1_more) {
|
|
coap_set_status_code(response, CONTINUE_2_31);
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/** @} */
|