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sm: fix sending of negative ltk reply

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This commit is contained in:
Matthias Ringwald 2016-09-28 10:43:33 +02:00
parent ff964d8e0b
commit 41d322973c
2 changed files with 27 additions and 15 deletions
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41
src/ble/sm.c
View File

@ -1908,6 +1908,21 @@ static void sm_run(void){
}
}
// handle basic actions that don't requires the full context
hci_connections_get_iterator(&it);
while(!sm_active_connection && btstack_linked_list_iterator_has_next(&it)){
hci_connection_t * hci_connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it);
sm_connection_t * sm_connection = &hci_connection->sm_connection;
switch(sm_connection->sm_engine_state){
// responder side
case SM_RESPONDER_PH0_SEND_LTK_REQUESTED_NEGATIVE_REPLY:
sm_connection->sm_engine_state = SM_RESPONDER_IDLE;
hci_send_cmd(&hci_le_long_term_key_negative_reply, sm_connection->sm_handle);
return;
default:
break;
}
}
//
// active connection handling
@ -1976,6 +1991,7 @@ static void sm_run(void){
switch (sm_connection->sm_irk_lookup_state){
case IRK_LOOKUP_SUCCEEDED:
// assuming Secure Connection, we have a stored LTK and the EDIV/RAND are null
// start using context by loading security info
sm_reset_setup();
sm_load_security_info(sm_connection);
if (setup->sm_peer_ediv == 0 && sm_is_null_random(setup->sm_peer_rand) && !sm_is_null_key(setup->sm_peer_ltk)){
@ -1984,15 +2000,11 @@ static void sm_run(void){
break;
}
log_info("LTK Request: ediv & random are empty, but no stored LTK (IRK Lookup Succeeded)");
sm_connection->sm_engine_state = SM_RESPONDER_PH0_SEND_LTK_REQUESTED_NEGATIVE_REPLY;
// don't lock setup context yet
done = 0;
sm_connection->sm_engine_state = SM_SC_SEND_LTK_REQUESTED_NEGATIVE_REPLY;
break;
case IRK_LOOKUP_FAILED:
log_info("LTK Request: ediv & random are empty, but no stored LTK (IRK Lookup Failed)");
sm_connection->sm_engine_state = SM_RESPONDER_PH0_SEND_LTK_REQUESTED_NEGATIVE_REPLY;
// don't lock setup context yet
done = 0;
sm_connection->sm_engine_state = SM_SC_SEND_LTK_REQUESTED_NEGATIVE_REPLY;
break;
default:
// just wait until IRK lookup is completed
@ -2042,7 +2054,6 @@ static void sm_run(void){
log_info("sm_run: state %u", connection->sm_engine_state);
// responding state
switch (connection->sm_engine_state){
// general
@ -2056,7 +2067,13 @@ static void sm_run(void){
break;
}
// responding state
#ifdef ENABLE_LE_SECURE_CONNECTIONS
case SM_SC_SEND_LTK_REQUESTED_NEGATIVE_REPLY:
connection->sm_engine_state = SM_RESPONDER_IDLE;
hci_send_cmd(&hci_le_long_term_key_negative_reply, connection->sm_handle);
sm_done_for_handle(connection->sm_handle);
return;
case SM_SC_W2_GET_RANDOM_A:
sm_random_start(connection);
connection->sm_engine_state = SM_SC_W4_GET_RANDOM_A;
@ -2115,8 +2132,8 @@ static void sm_run(void){
connection->sm_engine_state = SM_SC_W4_CALCULATE_H6_BR_EDR_LINK_KEY;
h6_calculate_br_edr_link_key(connection);
break;
#endif
// initiator side
case SM_INITIATOR_PH0_SEND_START_ENCRYPTION: {
sm_key_t peer_ltk_flipped;
@ -2136,14 +2153,8 @@ static void sm_run(void){
sm_timeout_reset(connection);
break;
// responder side
case SM_RESPONDER_PH0_SEND_LTK_REQUESTED_NEGATIVE_REPLY:
connection->sm_engine_state = SM_RESPONDER_IDLE;
hci_send_cmd(&hci_le_long_term_key_negative_reply, connection->sm_handle);
sm_done_for_handle(connection->sm_handle);
return;
#ifdef ENABLE_LE_SECURE_CONNECTIONS
case SM_SC_SEND_PUBLIC_KEY_COMMAND: {
uint8_t buffer[65];
buffer[0] = SM_CODE_PAIRING_PUBLIC_KEY;

1
src/hci.h
View File

@ -304,6 +304,7 @@ typedef enum {
// LE Secure Connections
SM_SC_RECEIVED_LTK_REQUEST,
SM_SC_SEND_LTK_REQUESTED_NEGATIVE_REPLY,
SM_SC_SEND_PUBLIC_KEY_COMMAND,
SM_SC_W4_PUBLIC_KEY_COMMAND,
SM_SC_W2_GET_RANDOM_A,