96 lines
3.1 KiB
C
96 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 file implements an immediate acknowledgement (Imm-Ack) generator for 802.15.4 radio driver.
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*
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*/
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#include "nrf_802154_imm_ack_generator.h"
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#include <assert.h>
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#include <string.h>
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#include "nrf_802154_ack_data.h"
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#include "nrf_802154_const.h"
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#define IMM_ACK_INITIALIZER {IMM_ACK_LENGTH, ACK_HEADER_WITH_PENDING, 0x00, 0x00, 0x00, 0x00}
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static uint8_t m_ack_data[IMM_ACK_LENGTH + PHR_SIZE];
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void nrf_802154_imm_ack_generator_init(void)
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{
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const uint8_t ack_data[] = IMM_ACK_INITIALIZER;
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memcpy(m_ack_data, ack_data, sizeof(ack_data));
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}
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void nrf_802154_imm_ack_generator_reset(void)
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{
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// Intentionally empty
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}
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uint8_t * nrf_802154_imm_ack_generator_create(
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const nrf_802154_frame_parser_data_t * p_frame_data)
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{
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if (nrf_802154_frame_parser_parse_level_get(p_frame_data) < PARSE_LEVEL_FULL)
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{
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// The entire frame being acknowledged is necessary to correctly generate Ack
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return NULL;
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}
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const uint8_t * frame_dsn = nrf_802154_frame_parser_dsn_get(p_frame_data);
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if (frame_dsn == NULL)
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{
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return NULL;
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}
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// Set valid sequence number in ACK frame.
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m_ack_data[DSN_OFFSET] = *frame_dsn;
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// Set pending bit in ACK frame.
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if (nrf_802154_ack_data_pending_bit_should_be_set(p_frame_data))
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{
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m_ack_data[FRAME_PENDING_OFFSET] = ACK_HEADER_WITH_PENDING;
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}
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else
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{
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m_ack_data[FRAME_PENDING_OFFSET] = ACK_HEADER_WITHOUT_PENDING;
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}
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return m_ack_data;
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}
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