91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/*
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* Copyright (c) 2015-2018, Yanzi Networks AB.
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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 copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** \addtogroup lwm2m
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* @{ */
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/**
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* \file
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* Header file for the Contiki OMA LWM2M TLV
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* \author
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* Joakim Eriksson <joakime@sics.se>
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* Niclas Finne <nfi@sics.se>
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*/
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#ifndef LWM2M_TLV_H_
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#define LWM2M_TLV_H_
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#include <stdint.h>
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#include <stddef.h>
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enum {
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LWM2M_TLV_TYPE_OBJECT_INSTANCE = 0,
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LWM2M_TLV_TYPE_RESOURCE_INSTANCE = 1,
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LWM2M_TLV_TYPE_MULTI_RESOURCE = 2,
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LWM2M_TLV_TYPE_RESOURCE = 3
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};
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typedef uint8_t lwm2m_tlv_type_t;
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typedef enum {
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LWM2M_TLV_LEN_TYPE_NO_LEN = 0,
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LWM2M_TLV_LEN_TYPE_8BIT_LEN = 1,
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LWM2M_TLV_LEN_TYPE_16BIT_LEN = 2,
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LWM2M_TLV_LEN_TYPE_24BIT_LEN = 3
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} lwm2m_tlv_len_type_t;
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typedef struct {
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lwm2m_tlv_type_t type;
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uint16_t id; /* can be 8-bit or 16-bit when serialized */
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uint32_t length;
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const uint8_t *value;
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} lwm2m_tlv_t;
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size_t lwm2m_tlv_get_size(const lwm2m_tlv_t *tlv);
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/* read a TLV from the buffer */
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size_t lwm2m_tlv_read(lwm2m_tlv_t *tlv, const uint8_t *buffer, size_t len);
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/* write a TLV to the buffer */
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size_t lwm2m_tlv_write(const lwm2m_tlv_t *tlv, uint8_t *buffer, size_t len);
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int32_t lwm2m_tlv_get_int32(const lwm2m_tlv_t *tlv);
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/* write a int as a TLV to the buffer */
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size_t lwm2m_tlv_write_int32(uint8_t type, int16_t id, int32_t value, uint8_t *buffer, size_t len);
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/* write a float converted from fixpoint as a TLV to the buffer */
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size_t lwm2m_tlv_write_float32(uint8_t type, int16_t id, int32_t value, int bits, uint8_t *buffer, size_t len);
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/* convert TLV with float32 to fixpoint */
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size_t lwm2m_tlv_float32_to_fix(const lwm2m_tlv_t *tlv, int32_t *value, int bits);
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#endif /* LWM2M_TLV_H_ */
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/** @} */
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