97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*
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* Copyright (c) 2017 - 2021, Nordic Semiconductor ASA
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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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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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, 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 OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/**
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* @file
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* This module implements an acknowledgement generator for 802.15.4 radio driver.
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*
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*/
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#include "nrf_802154_ack_generator.h"
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#include <assert.h>
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#include <stdlib.h>
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#include "nrf_802154_const.h"
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#include "nrf_802154_enh_ack_generator.h"
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#include "nrf_802154_imm_ack_generator.h"
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typedef enum
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{
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FRAME_VERSION_BELOW_2015,
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FRAME_VERSION_2015_OR_ABOVE,
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FRAME_VERSION_INVALID
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} frame_version_t;
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static frame_version_t frame_version_is_2015_or_above(const uint8_t * p_frame)
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{
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switch (p_frame[FRAME_VERSION_OFFSET] & FRAME_VERSION_MASK)
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{
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case FRAME_VERSION_0:
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case FRAME_VERSION_1:
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return FRAME_VERSION_BELOW_2015;
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case FRAME_VERSION_2:
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return FRAME_VERSION_2015_OR_ABOVE;
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default:
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return FRAME_VERSION_INVALID;
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}
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}
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void nrf_802154_ack_generator_init(void)
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{
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// Both generators are initialized to enable sending both Imm-Acks and Enh-Acks.
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nrf_802154_imm_ack_generator_init();
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nrf_802154_enh_ack_generator_init();
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}
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const uint8_t * nrf_802154_ack_generator_create(const uint8_t * p_frame)
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{
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// This function should not be called if ACK is not requested.
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assert(p_frame[ACK_REQUEST_OFFSET] & ACK_REQUEST_BIT);
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switch (frame_version_is_2015_or_above(p_frame))
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{
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case FRAME_VERSION_BELOW_2015:
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return nrf_802154_imm_ack_generator_create(p_frame);
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case FRAME_VERSION_2015_OR_ABOVE:
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return nrf_802154_enh_ack_generator_create(p_frame);
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default:
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return NULL;
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}
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}
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