188 lines
6.8 KiB
C
188 lines
6.8 KiB
C
/**
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* Copyright (c) 2016 - 2020, Nordic Semiconductor ASA
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*
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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 modification,
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* 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, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* 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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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA 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 SUBSTITUTE
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* GOODS OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "es_slot_reg.h"
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#include "es_security.h"
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#define ES_SLOT_NOT_CONFIGURED 0xab /** Value set in configured lists to indicate not configured slot. */
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/**@brief Function updating 'tlm_configured' property of slot registry when slot is being cleared.
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*
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* @param[in] p_reg Pointer to slot registry.
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* @param[in] slot_no Slot number to be used.
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*/
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static void update_tlm_configured_on_clearing(es_slot_reg_t * p_reg, uint8_t slot_no)
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{
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if (p_reg->tlm_configured && slot_no == p_reg->tlm_slot)
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{
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p_reg->tlm_configured = false;
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}
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}
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/**@brief Function updating 'num_configured_slots' and 'slots_configured' properties of slot registry when slot is being cleared.
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*
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* @param[in] p_configured Pointer to list of configured slots.
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* @param[in] p_num_configured_slots Pointer to number of configured slots.
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* @param[in] slot_no Slot number to clear.
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*/
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static void configured_slots_on_clear_update(uint8_t * p_configured, uint8_t * p_num_configured_slots, uint8_t slot_no)
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{
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uint8_t index_of_last_configured_slot = *p_num_configured_slots - 1;
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for (uint32_t i = 0; i < APP_MAX_ADV_SLOTS; ++i)
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{
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if (p_configured[i] == slot_no)
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{
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// Copy all values 'to the right' of the cleared slot one step to the left.
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if (i < index_of_last_configured_slot)
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{
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for (uint32_t j = i; j < index_of_last_configured_slot; ++j)
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{
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p_configured[j] = p_configured[j + 1];
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}
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// Write ES_SLOT_NOT_CONFIGURED to all rightmost not configured indexes.
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memset(&p_configured[index_of_last_configured_slot],
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ES_SLOT_NOT_CONFIGURED,
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APP_MAX_ADV_SLOTS - index_of_last_configured_slot);
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}
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else
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{
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// There are no values 'to the right', simply overwrite with ES_SLOT_NOT_CONFIGURED
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p_configured[i] = ES_SLOT_NOT_CONFIGURED;
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}
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*p_num_configured_slots -= 1;
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return;
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}
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}
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}
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bool es_slot_reg_etlm_required(const es_slot_reg_t * p_reg)
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{
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return (p_reg->num_configured_eid_slots > 0 && p_reg->tlm_configured);
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}
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bool es_slot_reg_clear_slot(es_slot_reg_t * p_reg, uint8_t slot_no)
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{
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bool eid_has_been_cleared = false;
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if (p_reg->slots[slot_no].configured)
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{
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update_tlm_configured_on_clearing(p_reg, slot_no);
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configured_slots_on_clear_update(p_reg->slots_configured,
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&p_reg->num_configured_slots,
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slot_no);
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if (p_reg->slots[slot_no].adv_frame.type == ES_FRAME_TYPE_EID)
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{
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configured_slots_on_clear_update(p_reg->eid_slots_configured,
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&p_reg->num_configured_eid_slots,
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slot_no);
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eid_has_been_cleared = true;
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}
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p_reg->slots[slot_no].configured = false;
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}
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memset(&p_reg->slots[slot_no], 0, sizeof(p_reg->slots[slot_no]));
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if (eid_has_been_cleared)
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{
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es_security_eid_slot_destroy(slot_no);
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}
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return eid_has_been_cleared;
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}
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void es_slot_reg_update_slot_list_info_on_add(es_slot_reg_t * p_reg,
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uint8_t slot_no,
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es_frame_type_t frame_type,
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bool init)
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{
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if (frame_type == ES_FRAME_TYPE_TLM)
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{
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p_reg->tlm_configured = true;
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p_reg->tlm_slot = slot_no;
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}
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if (!p_reg->slots[slot_no].configured || init)
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{
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p_reg->slots[slot_no].configured = true;
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// Note, we use 'num_configured_slots' before incrementing it, so it is pointing to the correct index.
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p_reg->slots_configured[p_reg->num_configured_slots] = slot_no;
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p_reg->num_configured_slots++;
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if (frame_type == ES_FRAME_TYPE_EID)
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{
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p_reg->eid_slots_configured[p_reg->num_configured_eid_slots] = slot_no;
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p_reg->num_configured_eid_slots++;
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}
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}
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// If an already configured slot has changed from anything TO an EID slot.
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else if (frame_type == ES_FRAME_TYPE_EID &&
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p_reg->slots[slot_no].adv_frame.type != ES_FRAME_TYPE_EID)
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{
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p_reg->eid_slots_configured[p_reg->num_configured_eid_slots] = slot_no;
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p_reg->num_configured_eid_slots++;
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}
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}
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void es_slot_reg_init(es_slot_reg_t * p_reg)
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{
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p_reg->tlm_configured = false;
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memset(p_reg->slots_configured, ES_SLOT_NOT_CONFIGURED, APP_MAX_ADV_SLOTS);
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memset(p_reg->eid_slots_configured, ES_SLOT_NOT_CONFIGURED, APP_MAX_EID_SLOTS);
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p_reg->num_configured_eid_slots = 0;
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p_reg->num_configured_slots = 0;
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}
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