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127 lines
4.3 KiB
C
127 lines
4.3 KiB
C
/*
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* Copyright (C) 2014 BlueKitchen GmbH
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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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*
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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 holders nor the names of
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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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* 4. Any redistribution, use, or modification is done solely for
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* personal benefit and not for any commercial purpose or for
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* monetary gain.
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*
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* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH 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 MATTHIAS
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* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Please inquire about commercial licensing options at
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* contact@bluekitchen-gmbh.com
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*
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*/
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#define __BTSTACK_FILE__ "mesh_iv_index_seq_number.c"
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#include "mesh_iv_index_seq_number.h"
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#include "btstack_debug.h"
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static uint32_t global_iv_index;
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static int global_iv_update_active;
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static uint32_t sequence_number_current;
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void mesh_set_iv_index(uint32_t iv_index){
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global_iv_index = iv_index;
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}
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uint32_t mesh_get_iv_index(void){
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return global_iv_index;
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}
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uint32_t mesh_get_iv_index_for_tx(void){
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if (global_iv_update_active){
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return global_iv_index - 1;
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} else {
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return global_iv_index;
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}
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}
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int mesh_iv_update_active(void){
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return global_iv_update_active;
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}
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void mesh_trigger_iv_update(void){
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if (global_iv_update_active) return;
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// "A node shall not start an IV Update procedure more often than once every 192 hours."
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// Unless triggered by user application, it will automatically triggered if sequene numbers are about to roll over
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// "A node shall defer state change from IV Update in Progress to Normal Operation, as defined by this procedure,
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// when the node has transmitted a Segmented Access message or a Segmented Control message without receiving the
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// corresponding Segment Acknowledgment messages. The deferred change of the state shall be executed when the appropriate
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// Segment Acknowledgment message is received or timeout for the delivery of this message is reached.
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//
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// Note: This requirement is necessary because upon completing the IV Update procedure the sequence number is reset
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// to 0x000000 and the SeqAuth value would not be valid."
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// set IV Update in Progress
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global_iv_update_active = 1;
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// increase IV index
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global_iv_index++;
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}
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void mesh_iv_update_completed(void){
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if (!global_iv_update_active) return;
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// set Normal mode
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global_iv_update_active = 0;
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}
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void mesh_iv_index_recovered(uint8_t iv_update_active, uint32_t iv_index){
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log_info("mesh_iv_index_recovered: active %u, index %u", iv_update_active, (int) iv_index);
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global_iv_index = iv_index;
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global_iv_update_active = iv_update_active;
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}
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//
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static void (*seq_num_callback)(void);
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void mesh_sequence_number_set_update_callback(void (*callback)(void)){
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seq_num_callback = callback;
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}
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void mesh_sequence_number_set(uint32_t seq){
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sequence_number_current = seq;
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}
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uint32_t mesh_sequence_number_next(void){
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uint32_t seq_number = sequence_number_current++;
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if (seq_num_callback){
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(*seq_num_callback)();
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}
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return seq_number;
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}
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uint32_t mesh_sequence_number_peek(void){
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return sequence_number_current;
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}
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