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mesh: implement IV Index Recovery procedure
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@ -47,8 +47,9 @@
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#include "mesh_keys.h"
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#include "mesh_foundation.h"
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#include "btstack_util.h"
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#include "btstack_memory.h"
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#include "btstack_debug.h"
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#include "btstack_event.h"
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#include "btstack_memory.h"
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#ifdef ENABLE_MESH_ADV_BEARER
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#include "mesh/adv_bearer.h"
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@ -1012,6 +1013,12 @@ void mesh_iv_update_completed(void){
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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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// Network PDU Getter
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uint8_t mesh_network_nid(mesh_network_pdu_t * network_pdu){
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return network_pdu->data[0] & 0x7f;
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@ -383,10 +383,28 @@ uint32_t mesh_get_iv_index(void);
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uint32_t mesh_get_iv_index_for_tx(void);
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/**
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* @brief Get IV Update state
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*/
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int mesh_iv_update_active(void);
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/**
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* @brief Trigger IV Update
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*/
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void mesh_trigger_iv_update(void);
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/**
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* @breif IV update was completed
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*/
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void mesh_iv_update_completed(void);
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/**
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* @brief IV Index was recovered
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* @param iv_update_active
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* @param iv_index
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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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// Testing only
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void mesh_network_received_message(const uint8_t * pdu_data, uint8_t pdu_len, uint8_t flags);
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void mesh_network_process_proxy_configuration_message(const uint8_t * pdu_data, uint8_t pdu_len);
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@ -1634,12 +1634,11 @@ static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint1
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uint32_t beacon_iv_index = big_endian_read_32(packet, 10);
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uint32_t local_iv_index = mesh_get_iv_index();
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int32_t iv_index_delta = (int32_t)(beacon_iv_index - local_iv_update_active);
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int32_t iv_index_delta = (int32_t)(beacon_iv_index - local_iv_index);
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// "If a node in Normal Operation receives a Secure Network beacon with an IV index greater than the last known IV Index + 1..."
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if (local_iv_update_active == 0 && iv_index_delta > 1){
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// "... it may initiate an IV Index Recovery procedure, see Section 3.10.6."
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// TODO: initiate IV Index Recovery procedure
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// "If a node in Normal Operation receives a Secure Network beacon with an IV index less than the last known IV Index or greater than
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// the last known IV Index + 42, the Secure Network beacon shall be ignored."
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if (iv_index_delta < 0 || iv_index_delta > 42){
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return;
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}
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@ -1653,12 +1652,6 @@ static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint1
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return;
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}
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// "If a node in Normal Operation receives a Secure Network beacon with an IV index less than the last known IV Index or greater than
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// the last known IV Index + 42, the Secure Network beacon shall be ignored."
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if (iv_index_delta < 0 || iv_index_delta > 42){
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return;
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}
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// "If this node is a member of a primary subnet and receives a Secure Network beacon on a secondary subnet with an IV Index greater than
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// the last known IV Index of the primary subnet, the Secure Network beacon shall be ignored."
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int member_of_primary_subnet = mesh_subnet_get_by_netkey_index(0) != NULL;
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@ -1667,9 +1660,19 @@ static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint1
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return;
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}
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// TODO: validate IV index w.r.t. local index
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// "If a node in Normal Operation receives a Secure Network beacon with an IV index greater than the last known IV Index + 1..."
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// "... it may initiate an IV Index Recovery procedure, see Section 3.10.6."
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if (local_iv_update_active == 0 && iv_index_delta > 1){
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// "Upon receiving and successfully authenticating a Secure Network beacon for a primary subnet... "
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int beacon_on_primary_subnet = subnet->netkey_index == 0;
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if (!beacon_on_primary_subnet) return;
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// "... whose IV Index is 1 or more higher than the current known IV Index, the node shall "
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// " set its current IV Index and its current IV Update procedure state from the values in this Secure Network beacon."
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mesh_iv_index_recovered(beacon_iv_update_active, beacon_iv_index);
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return;
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}
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if (mesh_iv_update_active()){
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if (local_iv_update_active == 0){
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if (beacon_iv_update_active){
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mesh_trigger_iv_update();
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}
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