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mesh: implement IV Index Recovery procedure

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This commit is contained in:
Matthias Ringwald 2019-07-09 11:01:27 +02:00
parent d0c07177da
commit 0882d02cd2
3 changed files with 42 additions and 14 deletions
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9
src/mesh/mesh_network.c
View File

@ -47,8 +47,9 @@
#include "mesh_keys.h"
#include "mesh_foundation.h"
#include "btstack_util.h"
#include "btstack_memory.h"
#include "btstack_debug.h"
#include "btstack_event.h"
#include "btstack_memory.h"
#ifdef ENABLE_MESH_ADV_BEARER
#include "mesh/adv_bearer.h"
@ -1012,6 +1013,12 @@ void mesh_iv_update_completed(void){
global_iv_update_active = 0;
}
void mesh_iv_index_recovered(uint8_t iv_update_active, uint32_t iv_index){
log_info("mesh_iv_index_recovered: active %u, index %u", iv_update_active, (int) iv_index);
global_iv_index = iv_index;
global_iv_update_active = iv_update_active;
}
// Network PDU Getter
uint8_t mesh_network_nid(mesh_network_pdu_t * network_pdu){
return network_pdu->data[0] & 0x7f;

18
src/mesh/mesh_network.h
View File

@ -383,10 +383,28 @@ uint32_t mesh_get_iv_index(void);
uint32_t mesh_get_iv_index_for_tx(void);
/**
* @brief Get IV Update state
*/
int mesh_iv_update_active(void);
/**
* @brief Trigger IV Update
*/
void mesh_trigger_iv_update(void);
/**
* @breif IV update was completed
*/
void mesh_iv_update_completed(void);
/**
* @brief IV Index was recovered
* @param iv_update_active
* @param iv_index
*/
void mesh_iv_index_recovered(uint8_t iv_update_active, uint32_t iv_index);
// Testing only
void mesh_network_received_message(const uint8_t * pdu_data, uint8_t pdu_len, uint8_t flags);
void mesh_network_process_proxy_configuration_message(const uint8_t * pdu_data, uint8_t pdu_len);

29
test/mesh/mesh_access.c
View File

@ -1634,12 +1634,11 @@ static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint1
uint32_t beacon_iv_index = big_endian_read_32(packet, 10);
uint32_t local_iv_index = mesh_get_iv_index();
int32_t iv_index_delta = (int32_t)(beacon_iv_index - local_iv_update_active);
int32_t iv_index_delta = (int32_t)(beacon_iv_index - local_iv_index);
// "If a node in Normal Operation receives a Secure Network beacon with an IV index greater than the last known IV Index + 1..."
if (local_iv_update_active == 0 && iv_index_delta > 1){
// "... it may initiate an IV Index Recovery procedure, see Section 3.10.6."
// TODO: initiate IV Index Recovery procedure
// "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
// the last known IV Index + 42, the Secure Network beacon shall be ignored."
if (iv_index_delta < 0 || iv_index_delta > 42){
return;
}
@ -1653,12 +1652,6 @@ static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint1
return;
}
// "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
// the last known IV Index + 42, the Secure Network beacon shall be ignored."
if (iv_index_delta < 0 || iv_index_delta > 42){
return;
}
// "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
// the last known IV Index of the primary subnet, the Secure Network beacon shall be ignored."
int member_of_primary_subnet = mesh_subnet_get_by_netkey_index(0) != NULL;
@ -1667,9 +1660,19 @@ static void mesh_access_secure_network_beacon_handler(uint8_t packet_type, uint1
return;
}
// TODO: validate IV index w.r.t. local index
// "If a node in Normal Operation receives a Secure Network beacon with an IV index greater than the last known IV Index + 1..."
// "... it may initiate an IV Index Recovery procedure, see Section 3.10.6."
if (local_iv_update_active == 0 && iv_index_delta > 1){
// "Upon receiving and successfully authenticating a Secure Network beacon for a primary subnet... "
int beacon_on_primary_subnet = subnet->netkey_index == 0;
if (!beacon_on_primary_subnet) return;
// "... whose IV Index is 1 or more higher than the current known IV Index, the node shall "
// " set its current IV Index and its current IV Update procedure state from the values in this Secure Network beacon."
mesh_iv_index_recovered(beacon_iv_update_active, beacon_iv_index);
return;
}
if (mesh_iv_update_active()){
if (local_iv_update_active == 0){
if (beacon_iv_update_active){
mesh_trigger_iv_update();
}