nes-proj/os/services/lwm2m/lwm2m-tlv.h

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/*
* Copyright (c) 2015-2018, Yanzi Networks AB.
* 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 copyright holder 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 COPYRIGHT HOLDER 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
* COPYRIGHT HOLDER 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.
*/
/** \addtogroup lwm2m
* @{ */
/**
* \file
* Header file for the Contiki OMA LWM2M TLV
* \author
* Joakim Eriksson <joakime@sics.se>
* Niclas Finne <nfi@sics.se>
*/
#ifndef LWM2M_TLV_H_
#define LWM2M_TLV_H_
#include <stdint.h>
#include <stddef.h>
enum {
LWM2M_TLV_TYPE_OBJECT_INSTANCE = 0,
LWM2M_TLV_TYPE_RESOURCE_INSTANCE = 1,
LWM2M_TLV_TYPE_MULTI_RESOURCE = 2,
LWM2M_TLV_TYPE_RESOURCE = 3
};
typedef uint8_t lwm2m_tlv_type_t;
typedef enum {
LWM2M_TLV_LEN_TYPE_NO_LEN = 0,
LWM2M_TLV_LEN_TYPE_8BIT_LEN = 1,
LWM2M_TLV_LEN_TYPE_16BIT_LEN = 2,
LWM2M_TLV_LEN_TYPE_24BIT_LEN = 3
} lwm2m_tlv_len_type_t;
typedef struct {
lwm2m_tlv_type_t type;
uint16_t id; /* can be 8-bit or 16-bit when serialized */
uint32_t length;
const uint8_t *value;
} lwm2m_tlv_t;
size_t lwm2m_tlv_get_size(const lwm2m_tlv_t *tlv);
/* read a TLV from the buffer */
size_t lwm2m_tlv_read(lwm2m_tlv_t *tlv, const uint8_t *buffer, size_t len);
/* write a TLV to the buffer */
size_t lwm2m_tlv_write(const lwm2m_tlv_t *tlv, uint8_t *buffer, size_t len);
int32_t lwm2m_tlv_get_int32(const lwm2m_tlv_t *tlv);
/* write a int as a TLV to the buffer */
size_t lwm2m_tlv_write_int32(uint8_t type, int16_t id, int32_t value, uint8_t *buffer, size_t len);
/* write a float converted from fixpoint as a TLV to the buffer */
size_t lwm2m_tlv_write_float32(uint8_t type, int16_t id, int32_t value, int bits, uint8_t *buffer, size_t len);
/* convert TLV with float32 to fixpoint */
size_t lwm2m_tlv_float32_to_fix(const lwm2m_tlv_t *tlv, int32_t *value, int bits);
#endif /* LWM2M_TLV_H_ */
/** @} */