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esp-idf/components/bt/host/bluedroid/stack/btm/btm_ble_privacy.c

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/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains functions for BLE controller based privacy.
*
******************************************************************************/
#include <string.h>
#include "common/bt_target.h"
#if (BLE_INCLUDED == TRUE && BLE_PRIVACY_SPT == TRUE)
#include "stack/bt_types.h"
#include "stack/hcimsgs.h"
#include "stack/btu.h"
//#include "vendor_hcidefs.h"
#include "btm_int.h"
#include "device/controller.h"
#include "stack/hcidefs.h"
#define HCI_VENDOR_BLE_RPA_VSC (0x0155 | HCI_GRP_VENDOR_SPECIFIC)
/* RPA offload VSC specifics */
#define BTM_BLE_META_IRK_ENABLE 0x01
#define BTM_BLE_META_ADD_IRK_ENTRY 0x02
#define BTM_BLE_META_REMOVE_IRK_ENTRY 0x03
#define BTM_BLE_META_CLEAR_IRK_LIST 0x04
#define BTM_BLE_META_READ_IRK_ENTRY 0x05
#define BTM_BLE_META_CS_RESOLVE_ADDR 0x00000001
#define BTM_BLE_IRK_ENABLE_LEN 2
#define BTM_BLE_META_ADD_IRK_LEN 24
#define BTM_BLE_META_REMOVE_IRK_LEN 8
#define BTM_BLE_META_CLEAR_IRK_LEN 1
#define BTM_BLE_META_READ_IRK_LEN 2
#define BTM_BLE_META_ADD_WL_ATTR_LEN 9
/*******************************************************************************
** Functions implemented controller based privacy using Resolving List
*******************************************************************************/
/*******************************************************************************
**
** Function btm_ble_enq_resolving_list_pending
**
** Description add target address into resolving pending operation queue
**
** Parameters target_bda: target device address
** add_entry: TRUE for add entry, FALSE for remove entry
**
** Returns void
**
*******************************************************************************/
void btm_ble_enq_resolving_list_pending(BD_ADDR pseudo_bda, UINT8 op_code)
{
tBTM_BLE_RESOLVE_Q *p_q = &btm_cb.ble_ctr_cb.resolving_list_pend_q;
memcpy(p_q->resolve_q_random_pseudo[p_q->q_next], pseudo_bda, BD_ADDR_LEN);
p_q->resolve_q_action[p_q->q_next] = op_code;
p_q->q_next ++;
p_q->q_next %= controller_get_interface()->get_ble_resolving_list_max_size();
}
/*******************************************************************************
**
** Function btm_ble_brcm_find_resolving_pending_entry
**
** Description check to see if the action is in pending list
**
** Parameters TRUE: action pending;
** FALSE: new action
**
** Returns void
**
*******************************************************************************/
BOOLEAN btm_ble_brcm_find_resolving_pending_entry(BD_ADDR pseudo_addr, UINT8 action)
{
tBTM_BLE_RESOLVE_Q *p_q = &btm_cb.ble_ctr_cb.resolving_list_pend_q;
for (UINT8 i = p_q->q_pending; i != p_q->q_next;) {
if (memcmp(p_q->resolve_q_random_pseudo[i], pseudo_addr, BD_ADDR_LEN) == 0 &&
action == p_q->resolve_q_action[i]) {
return TRUE;
}
i ++;
i %= controller_get_interface()->get_ble_resolving_list_max_size();
}
return FALSE;
}
/*******************************************************************************
**
** Function btm_ble_deq_resolving_pending
**
** Description dequeue target address from resolving pending operation queue
**
** Parameters pseudo_addr: pseudo_addr device address
**
** Returns void
**
*******************************************************************************/
BOOLEAN btm_ble_deq_resolving_pending(BD_ADDR pseudo_addr)
{
tBTM_BLE_RESOLVE_Q *p_q = &btm_cb.ble_ctr_cb.resolving_list_pend_q;
if (p_q->q_next != p_q->q_pending) {
memcpy(pseudo_addr, p_q->resolve_q_random_pseudo[p_q->q_pending], BD_ADDR_LEN);
memset(p_q->resolve_q_random_pseudo[p_q->q_pending], 0, BD_ADDR_LEN);
p_q->q_pending ++;
p_q->q_pending %= controller_get_interface()->get_ble_resolving_list_max_size();
return TRUE;
}
return FALSE;
}
/*******************************************************************************
**
** Function btm_ble_clear_irk_index
**
** Description clear IRK list index mask for availability
**
** Returns none
**
*******************************************************************************/
void btm_ble_clear_irk_index(UINT8 index)
{
UINT8 byte;
UINT8 bit;
if (index < controller_get_interface()->get_ble_resolving_list_max_size()) {
byte = index / 8;
bit = index % 8;
btm_cb.ble_ctr_cb.irk_list_mask[byte] &= (~(1 << bit));
}
}
/*******************************************************************************
**
** Function btm_ble_find_irk_index
**
** Description find the first available IRK list index
**
** Returns index from 0 ~ max (127 default)
**
*******************************************************************************/
UINT8 btm_ble_find_irk_index(void)
{
UINT8 i = 0;
UINT8 byte;
UINT8 bit;
while (i < controller_get_interface()->get_ble_resolving_list_max_size()) {
byte = i / 8;
bit = i % 8;
if ((btm_cb.ble_ctr_cb.irk_list_mask[byte] & (1 << bit)) == 0) {
btm_cb.ble_ctr_cb.irk_list_mask[byte] |= (1 << bit);
return i;
}
i++;
}
BTM_TRACE_ERROR ("%s failed, list full", __func__);
return i;
}
/*******************************************************************************
**
** Function btm_ble_update_resolving_list
**
** Description update resolving list entry in host maintained record
**
** Returns void
**
*******************************************************************************/
void btm_ble_update_resolving_list(BD_ADDR pseudo_bda, BOOLEAN add)
{
tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(pseudo_bda);
if (p_dev_rec == NULL) {
return;
}
if (add) {
p_dev_rec->ble.in_controller_list |= BTM_RESOLVING_LIST_BIT;
if (!controller_get_interface()->supports_ble_privacy()) {
p_dev_rec->ble.resolving_list_index = btm_ble_find_irk_index();
}
} else {
p_dev_rec->ble.in_controller_list &= ~BTM_RESOLVING_LIST_BIT;
if (!controller_get_interface()->supports_ble_privacy()) {
/* clear IRK list index mask */
btm_ble_clear_irk_index(p_dev_rec->ble.resolving_list_index);
p_dev_rec->ble.resolving_list_index = 0;
}
}
}
/*******************************************************************************
**
** Function btm_ble_clear_resolving_list_complete
**
** Description This function is called when command complete for
** clear resolving list
**
** Returns void
**
*******************************************************************************/
void btm_ble_clear_resolving_list_complete(UINT8 *p, UINT16 evt_len)
{
UINT8 status = 0;
STREAM_TO_UINT8(status, p);
BTM_TRACE_DEBUG("%s status=%d", __func__, status);
if (status == HCI_SUCCESS) {
if (evt_len >= 3) {
/* VSC complete has one extra byte for op code and list size, skip it here */
p ++;
/* updated the available list size, and current list size */
uint8_t irk_list_sz_max = 0;
STREAM_TO_UINT8(irk_list_sz_max, p);
if (controller_get_interface()->get_ble_resolving_list_max_size() == 0) {
btm_ble_resolving_list_init(irk_list_sz_max);
}
uint8_t irk_mask_size = (irk_list_sz_max % 8) ?
(irk_list_sz_max / 8 + 1) : (irk_list_sz_max / 8);
memset(btm_cb.ble_ctr_cb.irk_list_mask, 0, irk_mask_size);
}
btm_cb.ble_ctr_cb.resolving_list_avail_size =
controller_get_interface()->get_ble_resolving_list_max_size();
BTM_TRACE_DEBUG("%s resolving_list_avail_size=%d",
__func__, btm_cb.ble_ctr_cb.resolving_list_avail_size);
list_node_t *p_node = NULL;
tBTM_SEC_DEV_REC *p_dev_rec = NULL;
for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
p_dev_rec = list_node(p_node);
p_dev_rec->ble.in_controller_list &= ~BTM_RESOLVING_LIST_BIT;
}
}
}
/*******************************************************************************
**
** Function btm_ble_add_resolving_list_entry_complete
**
** Description This function is called when command complete for
** add resolving list entry
**
** Returns void
**
*******************************************************************************/
void btm_ble_add_resolving_list_entry_complete(UINT8 *p, UINT16 evt_len)
{
UINT8 status;
STREAM_TO_UINT8(status, p);
BTM_TRACE_DEBUG("%s status = %d", __func__, status);
BD_ADDR pseudo_bda;
if (!btm_ble_deq_resolving_pending(pseudo_bda)) {
BTM_TRACE_DEBUG("no pending resolving list operation");
return;
}
if (status == HCI_SUCCESS) {
/* privacy 1.2 command complete does not have these extra byte */
if (evt_len > 2) {
/* VSC complete has one extra byte for op code, skip it here */
p ++;
STREAM_TO_UINT8(btm_cb.ble_ctr_cb.resolving_list_avail_size, p);
} else {
btm_cb.ble_ctr_cb.resolving_list_avail_size --;
}
} else if (status == HCI_ERR_MEMORY_FULL) { /* BT_ERROR_CODE_MEMORY_CAPACITY_EXCEEDED */
btm_cb.ble_ctr_cb.resolving_list_avail_size = 0;
BTM_TRACE_ERROR("%s Resolving list Full ", __func__);
} else {
BTM_TRACE_ERROR("%s Add resolving list error %d ", __func__, status);
}
}
/*******************************************************************************
**
** Function btm_ble_remove_resolving_list_entry_complete
**
** Description This function is called when command complete for
** remove resolving list entry
**
** Returns void
**
*******************************************************************************/
void btm_ble_remove_resolving_list_entry_complete(UINT8 *p, UINT16 evt_len)
{
BD_ADDR pseudo_bda;
UINT8 status;
STREAM_TO_UINT8(status, p);
BTM_TRACE_DEBUG("%s status = %d", __func__, status);
if (!btm_ble_deq_resolving_pending(pseudo_bda)) {
BTM_TRACE_ERROR("%s no pending resolving list operation", __func__);
return;
}
if (status == HCI_SUCCESS) {
/* proprietary: spec does not have these extra bytes */
if (evt_len > 2) {
p ++; /* skip opcode */
STREAM_TO_UINT8(btm_cb.ble_ctr_cb.resolving_list_avail_size, p);
} else {
btm_cb.ble_ctr_cb.resolving_list_avail_size++;
}
} else {
BTM_TRACE_ERROR("%s remove resolving list error 0x%x", __func__, status);
}
}
/*******************************************************************************
**
** Function btm_ble_read_resolving_list_entry_complete
**
** Description This function is called when command complete for
** remove resolving list entry
**
** Returns void
**
*******************************************************************************/
void btm_ble_read_resolving_list_entry_complete(UINT8 *p, UINT16 evt_len)
{
UINT8 status, rra_type = BTM_BLE_ADDR_PSEUDO;
BD_ADDR rra, pseudo_bda;
STREAM_TO_UINT8 (status, p);
BTM_TRACE_DEBUG("%s status = %d", __func__, status);
if (!btm_ble_deq_resolving_pending(pseudo_bda)) {
BTM_TRACE_ERROR("no pending resolving list operation");
return;
}
if (status == HCI_SUCCESS) {
/* proprietary spec has extra bytes */
if (evt_len > 8) {
p += (2 + 16 + 1 + 6); /* skip subcode, index, IRK value, address type, identity addr type */
STREAM_TO_BDADDR(rra, p);
BTM_TRACE_ERROR("%s peer_addr: %02x:%02x:%02x:%02x:%02x:%02x",
__func__, rra[0], rra[1], rra[2], rra[3], rra[4], rra[5]);
} else {
STREAM_TO_BDADDR(rra, p);
}
btm_ble_refresh_peer_resolvable_private_addr(pseudo_bda, rra, rra_type);
}
}
/*******************************************************************************
**
** Function btm_ble_set_addr_resolution_enable_complete
**
** Description This function is called when the command to set address
** resolution enable completes.
**
** Parameters p: Pointer to the command complete event data.
** evt_len: Length of the event data.
**
** Returns void
**
*******************************************************************************/
void btm_ble_set_addr_resolution_enable_complete(UINT8 *p, UINT16 evt_len)
{
UINT8 status;
STREAM_TO_UINT8(status, p);
BTM_TRACE_DEBUG("%s status = %d", __func__, status);
tBTM_LE_RANDOM_CB *random_cb = &btm_cb.ble_ctr_cb.addr_mgnt_cb;
if (!(random_cb && random_cb->set_local_privacy_cback)) {
return;
}
if (status == HCI_SUCCESS) {
random_cb->set_local_privacy_cback(BTM_SUCCESS);
return;
} else if (status == HCI_ERR_COMMAND_DISALLOWED) {
BTM_TRACE_ERROR("a non-connected activity is ongoing, such as advertising and scanning");
} else {
BTM_TRACE_ERROR("set local privacy failed");
}
random_cb->set_local_privacy_cback(BTM_ILLEGAL_VALUE);
}
/*******************************************************************************
VSC that implement controller based privacy
********************************************************************************/
/*******************************************************************************
**
** Function btm_ble_resolving_list_vsc_op_cmpl
**
** Description IRK operation VSC complete handler
**
** Parameters
**
** Returns void
**
*******************************************************************************/
void btm_ble_resolving_list_vsc_op_cmpl (tBTM_VSC_CMPL *p_params)
{
UINT8 *p = p_params->p_param_buf, op_subcode;
UINT16 evt_len = p_params->param_len;
op_subcode = *(p + 1);
BTM_TRACE_DEBUG("%s op_subcode = %d", __func__, op_subcode);
if (op_subcode == BTM_BLE_META_CLEAR_IRK_LIST) {
btm_ble_clear_resolving_list_complete(p, evt_len);
} else if (op_subcode == BTM_BLE_META_ADD_IRK_ENTRY) {
btm_ble_add_resolving_list_entry_complete(p, evt_len);
} else if (op_subcode == BTM_BLE_META_REMOVE_IRK_ENTRY) {
btm_ble_remove_resolving_list_entry_complete(p, evt_len);
} else if (op_subcode == BTM_BLE_META_READ_IRK_ENTRY) {
btm_ble_read_resolving_list_entry_complete(p, evt_len);
} else if (op_subcode == BTM_BLE_META_IRK_ENABLE) {
/* RPA offloading enable/disabled */
}
}
/*******************************************************************************
**
** Function btm_ble_remove_resolving_list_entry
**
** Description This function to remove an IRK entry from the list
**
** Parameters ble_addr_type: address type
** ble_addr: LE adddress
**
** Returns status
**
*******************************************************************************/
tBTM_STATUS btm_ble_remove_resolving_list_entry(tBTM_SEC_DEV_REC *p_dev_rec)
{
/* if controller does not support RPA offloading or privacy 1.2, skip */
if (controller_get_interface()->get_ble_resolving_list_max_size() == 0) {
return BTM_WRONG_MODE;
}
tBTM_STATUS st = BTM_NO_RESOURCES;
if (controller_get_interface()->supports_ble_privacy()) {
#if CONTROLLER_RPA_LIST_ENABLE
if (btsnd_hcic_ble_rm_device_resolving_list(p_dev_rec->ble.static_addr_type,
p_dev_rec->ble.static_addr)) {
st = BTM_CMD_STARTED;
}
#else
// do nothing
/* It will cause that scanner doesn't send scan request to advertiser
* which has sent IRK to us and we have stored the IRK in controller.
* It is a hardware limitation. The preliminary solution is not to
* send key to the controller, but to resolve the random address in host. */
#endif
} else {
UINT8 param[20] = {0};
UINT8 *p = param;
UINT8_TO_STREAM(p, BTM_BLE_META_REMOVE_IRK_ENTRY);
UINT8_TO_STREAM(p, p_dev_rec->ble.static_addr_type);
BDADDR_TO_STREAM(p, p_dev_rec->ble.static_addr);
st = BTM_VendorSpecificCommand(HCI_VENDOR_BLE_RPA_VSC,
BTM_BLE_META_REMOVE_IRK_LEN,
param,
btm_ble_resolving_list_vsc_op_cmpl);
}
if (st == BTM_CMD_STARTED) {
btm_ble_enq_resolving_list_pending( p_dev_rec->bd_addr, BTM_BLE_META_REMOVE_IRK_ENTRY);
}
return st;
}
/*******************************************************************************
**
** Function btm_ble_clear_resolving_list
**
** Description This function clears the resolving list
**
** Parameters None.
**
** Returns status
**
*******************************************************************************/
tBTM_STATUS btm_ble_clear_resolving_list(void)
{
tBTM_STATUS st = BTM_NO_RESOURCES;
if (controller_get_interface()->supports_ble_privacy()) {
if (btsnd_hcic_ble_clear_resolving_list()) {
st = BTM_SUCCESS;
}
} else {
UINT8 param[20] = {0};
UINT8 *p = param;
UINT8_TO_STREAM(p, BTM_BLE_META_CLEAR_IRK_LIST);
st = BTM_VendorSpecificCommand (HCI_VENDOR_BLE_RPA_VSC,
BTM_BLE_META_CLEAR_IRK_LEN,
param,
btm_ble_resolving_list_vsc_op_cmpl);
}
return st;
}
/*******************************************************************************
**
** Function btm_ble_read_resolving_list_entry
**
** Description This function read an IRK entry by index
**
** Parameters entry index.
**
** Returns status
**
*******************************************************************************/
tBTM_STATUS btm_ble_read_resolving_list_entry(tBTM_SEC_DEV_REC *p_dev_rec)
{
tBTM_STATUS st = BTM_NO_RESOURCES;
if (!(p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT)) {
return BTM_WRONG_MODE;
}
if (controller_get_interface()->supports_ble_privacy()) {
if (btsnd_hcic_ble_read_resolvable_addr_peer(p_dev_rec->ble.static_addr_type,
p_dev_rec->ble.static_addr)) {
st = BTM_CMD_STARTED;
}
} else {
UINT8 param[20] = {0};
UINT8 *p = param;
UINT8_TO_STREAM(p, BTM_BLE_META_READ_IRK_ENTRY);
UINT8_TO_STREAM(p, p_dev_rec->ble.resolving_list_index);
st = BTM_VendorSpecificCommand (HCI_VENDOR_BLE_RPA_VSC,
BTM_BLE_META_READ_IRK_LEN,
param,
btm_ble_resolving_list_vsc_op_cmpl);
}
if (st == BTM_CMD_STARTED) {
btm_ble_enq_resolving_list_pending(p_dev_rec->bd_addr,
BTM_BLE_META_READ_IRK_ENTRY);
}
return st;
}
/*******************************************************************************
**
** Function btm_ble_suspend_resolving_list_activity
**
** Description This function suspends all resolving list activity, including
** scan, initiating, and advertising, if resolving list is being
** enabled.
**
** Parameters
**
** Returns TRUE if suspended; FALSE otherwise
**
*******************************************************************************/
BOOLEAN btm_ble_suspend_resolving_list_activity(void)
{
tBTM_BLE_CB *p_ble_cb = &btm_cb.ble_ctr_cb;
/* if resolving list is not enabled, do not need to terminate any activity */
/* if asking for stop all activity */
/* if already suspended */
if (p_ble_cb->suspended_rl_state != BTM_BLE_RL_IDLE) {
return TRUE;
}
/* direct connection active, wait until it completed */
if (btm_ble_get_conn_st() == BLE_DIR_CONN) {
BTM_TRACE_ERROR("resolving list can not be edited, EnQ now");
return FALSE;
}
p_ble_cb->suspended_rl_state = BTM_BLE_RL_IDLE;
if (p_ble_cb->inq_var.adv_mode == BTM_BLE_ADV_ENABLE) {
btm_ble_stop_adv();
p_ble_cb->suspended_rl_state |= BTM_BLE_RL_ADV;
}
if (BTM_BLE_IS_SCAN_ACTIVE(p_ble_cb->scan_activity)) {
btm_ble_stop_scan();
p_ble_cb->suspended_rl_state |= BTM_BLE_RL_SCAN;
}
if (btm_ble_suspend_bg_conn()) {
p_ble_cb->suspended_rl_state |= BTM_BLE_RL_INIT;
}
return TRUE;
}
/*******************************************************************************
**
** Function btm_ble_resume_resolving_list_activity
**
** Description This function resumes the resolving list activity, including
** scanning, initiating, and advertising, if any of these
** activities has been suspended earlier.
**
** Returns none
**
*******************************************************************************/
void btm_ble_resume_resolving_list_activity(void)
{
tBTM_BLE_CB *p_ble_cb = &btm_cb.ble_ctr_cb;
if (p_ble_cb->suspended_rl_state & BTM_BLE_RL_ADV) {
btm_ble_start_adv();
}
if (p_ble_cb->suspended_rl_state & BTM_BLE_RL_SCAN) {
btm_ble_start_scan();
}
if (p_ble_cb->suspended_rl_state & BTM_BLE_RL_INIT) {
btm_ble_resume_bg_conn();
}
p_ble_cb->suspended_rl_state = BTM_BLE_RL_IDLE;
}
/*******************************************************************************
**
** Function btm_ble_vendor_enable_irk_feature
**
** Description This function is called to enable or disable the RRA
** offloading feature.
**
** Parameters enable: enable or disable the RRA offloading feature
**
** Returns BTM_SUCCESS if successful
**
*******************************************************************************/
tBTM_STATUS btm_ble_vendor_enable_irk_feature(BOOLEAN enable)
{
UINT8 param[20], *p;
tBTM_STATUS st = BTM_MODE_UNSUPPORTED;
p = param;
memset(param, 0, 20);
/* select feature based on control block settings */
UINT8_TO_STREAM(p, BTM_BLE_META_IRK_ENABLE);
UINT8_TO_STREAM(p, enable ? 0x01 : 0x00);
st = BTM_VendorSpecificCommand (HCI_VENDOR_BLE_RPA_VSC, BTM_BLE_IRK_ENABLE_LEN,
param, btm_ble_resolving_list_vsc_op_cmpl);
return st;
}
/*******************************************************************************
**
** Function btm_ble_exe_disable_resolving_list
**
** Description execute resolving list disable
**
** Returns none
**
*******************************************************************************/
BOOLEAN btm_ble_exe_disable_resolving_list(void)
{
if (!btm_ble_suspend_resolving_list_activity()) {
return FALSE;
}
if (!controller_get_interface()->supports_ble_privacy()) {
btm_ble_vendor_enable_irk_feature(FALSE);
} else {
//btsnd_hcic_ble_set_addr_resolution_enable(FALSE);
}
return TRUE;
}
/*******************************************************************************
**
** Function btm_ble_exe_enable_resolving_list
**
** Description enable LE resolve address list
**
** Returns none
**
*******************************************************************************/
void btm_ble_exe_enable_resolving_list(void)
{
if (!btm_ble_suspend_resolving_list_activity()) {
return;
}
if (!controller_get_interface()->supports_ble_privacy()) {
btm_ble_vendor_enable_irk_feature(TRUE);
} else {
//btsnd_hcic_ble_set_addr_resolution_enable(TRUE);
}
}
/*******************************************************************************
**
** Function btm_ble_disable_resolving_list
**
** Description Disable LE Address resolution
**
** Returns none
**
*******************************************************************************/
BOOLEAN btm_ble_disable_resolving_list(UINT8 rl_mask, BOOLEAN to_resume )
{
UINT8 rl_state = btm_cb.ble_ctr_cb.rl_state;
/* if controller does not support RPA offloading or privacy 1.2, skip */
if (controller_get_interface()->get_ble_resolving_list_max_size() == 0) {
return FALSE;
}
btm_cb.ble_ctr_cb.rl_state &= ~rl_mask;
if (rl_state != BTM_BLE_RL_IDLE && btm_cb.ble_ctr_cb.rl_state == BTM_BLE_RL_IDLE) {
if (btm_ble_exe_disable_resolving_list()) {
if (to_resume) {
btm_ble_resume_resolving_list_activity();
}
return TRUE;
} else {
return FALSE;
}
}
return TRUE;
}
/*******************************************************************************
**
** Function btm_ble_resolving_list_load_dev
**
** Description This function add a device which is using RPA into white list
**
** Parameters pointer to device security record
**
** Returns TRUE if device added, otherwise falase.
**
*******************************************************************************/
BOOLEAN btm_ble_resolving_list_load_dev(tBTM_SEC_DEV_REC *p_dev_rec)
{
BOOLEAN rt = FALSE;
#if (SMP_INCLUDED == TRUE)
UINT8 rl_mask = btm_cb.ble_ctr_cb.rl_state;
BTM_TRACE_DEBUG("%s btm_cb.ble_ctr_cb.privacy_mode = %d\n", __func__,
btm_cb.ble_ctr_cb.privacy_mode);
/* if controller does not support RPA offloading or privacy 1.2, skip */
if (controller_get_interface()->get_ble_resolving_list_max_size() == 0) {
return FALSE;
}
BTM_TRACE_DEBUG("%s btm_cb.ble_ctr_cb.privacy_mode = %d\n",
__func__, btm_cb.ble_ctr_cb.privacy_mode);
/* only add RPA enabled device into resolving list */
if (p_dev_rec != NULL && /* RPA is being used and PID is known */
(p_dev_rec->sec_flags & BTM_SEC_IN_USE) != 0 &&
((p_dev_rec->ble.key_type & BTM_LE_KEY_PID) != 0 ||
(p_dev_rec->ble.key_type & BTM_LE_KEY_LID) != 0)) {
if (!(p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT) &&
btm_ble_brcm_find_resolving_pending_entry(p_dev_rec->bd_addr,
BTM_BLE_META_ADD_IRK_ENTRY) == FALSE) {
if (btm_cb.ble_ctr_cb.resolving_list_avail_size > 0) {
if (rl_mask) {
if (!btm_ble_disable_resolving_list (rl_mask, FALSE)) {
return FALSE;
}
}
btm_ble_update_resolving_list(p_dev_rec->bd_addr, TRUE);
if (controller_get_interface()->supports_ble_privacy()) {
BD_ADDR dummy_bda = {0};
if (memcmp(p_dev_rec->ble.static_addr, dummy_bda, BD_ADDR_LEN) == 0) {
memcpy(p_dev_rec->ble.static_addr, p_dev_rec->bd_addr, BD_ADDR_LEN);
p_dev_rec->ble.static_addr_type = p_dev_rec->ble.ble_addr_type;
}
#if CONTROLLER_RPA_LIST_ENABLE
BTM_TRACE_DEBUG("%s:adding device to controller resolving list\n", __func__);
UINT8 *peer_irk = p_dev_rec->ble.keys.irk;
UINT8 *local_irk = btm_cb.devcb.id_keys.irk;
//use identical IRK for now
rt = btsnd_hcic_ble_add_device_resolving_list(p_dev_rec->ble.static_addr_type,
p_dev_rec->ble.static_addr, peer_irk, local_irk);
#else
// do nothing
/* It will cause that scanner doesn't send scan request to advertiser
* which has sent IRK to us and we have stored the IRK in controller.
* It is a hardware limitation. The preliminary solution is not to
* send key to the controller, but to resolve the random address in host. */
#endif
} else {
UINT8 param[40] = {0};
UINT8 *p = param;
UINT8_TO_STREAM(p, BTM_BLE_META_ADD_IRK_ENTRY);
ARRAY_TO_STREAM(p, p_dev_rec->ble.keys.irk, BT_OCTET16_LEN);
UINT8_TO_STREAM(p, p_dev_rec->ble.static_addr_type);
BDADDR_TO_STREAM(p, p_dev_rec->ble.static_addr);
if (BTM_VendorSpecificCommand (HCI_VENDOR_BLE_RPA_VSC,
BTM_BLE_META_ADD_IRK_LEN,
param,
btm_ble_resolving_list_vsc_op_cmpl)
== BTM_CMD_STARTED) {
rt = TRUE;
}
}
if (rt) {
btm_ble_enq_resolving_list_pending(p_dev_rec->bd_addr,
BTM_BLE_META_ADD_IRK_ENTRY);
}
/* if resolving list has been turned on, re-enable it */
// if (rl_mask) {
// btm_ble_enable_resolving_list(rl_mask);
// } else {
// btm_ble_enable_resolving_list(BTM_BLE_RL_INIT);
// }
} else {
BTM_TRACE_WARNING("%s Resolving list full ", __func__);
}
} else {
BTM_TRACE_DEBUG("Device already in Resolving list\n");
rt = TRUE;
}
} else {
BTM_TRACE_DEBUG("Device not a RPA enabled device\n");
}
#endif ///SMP_INCLUDED == TRUE
return rt;
}
/*******************************************************************************
**
** Function btm_ble_resolving_list_remove_dev
**
** Description This function removes the device from resolving list
**
** Parameters
**
** Returns status
**
*******************************************************************************/
void btm_ble_resolving_list_remove_dev(tBTM_SEC_DEV_REC *p_dev_rec)
{
UINT8 rl_mask = btm_cb.ble_ctr_cb.rl_state;
BTM_TRACE_EVENT ("%s\n", __func__);
if (rl_mask) {
if (!btm_ble_disable_resolving_list (rl_mask, FALSE)) {
return;
}
}
if ((p_dev_rec->ble.in_controller_list & BTM_RESOLVING_LIST_BIT) &&
btm_ble_brcm_find_resolving_pending_entry(p_dev_rec->bd_addr,
BTM_BLE_META_REMOVE_IRK_ENTRY) == FALSE) {
btm_ble_update_resolving_list( p_dev_rec->bd_addr, FALSE);
btm_ble_remove_resolving_list_entry(p_dev_rec);
} else {
BTM_TRACE_DEBUG("Device not in resolving list\n");
}
/* if resolving list has been turned on, re-enable it */
// if (rl_mask) {
// btm_ble_enable_resolving_list(rl_mask);
// }
}
/*******************************************************************************
**
** Function btm_ble_enable_resolving_list
**
** Description enable LE resolve address list
**
** Returns none
**
*******************************************************************************/
void btm_ble_enable_resolving_list(UINT8 rl_mask)
{
UINT8 rl_state = btm_cb.ble_ctr_cb.rl_state;
btm_cb.ble_ctr_cb.rl_state |= rl_mask;
if (rl_state == BTM_BLE_RL_IDLE &&
btm_cb.ble_ctr_cb.rl_state != BTM_BLE_RL_IDLE &&
controller_get_interface()->get_ble_resolving_list_max_size() != 0) {
btm_ble_exe_enable_resolving_list();
btm_ble_resume_resolving_list_activity();
}
}
#if 0 //Unused
/*******************************************************************************
**
** Function btm_ble_resolving_list_empty
**
** Description check to see if resoving list is empty or not
**
** Returns TRUE: empty; FALSE non-empty
**
*******************************************************************************/
BOOLEAN btm_ble_resolving_list_empty(void)
{
return (controller_get_interface()->get_ble_resolving_list_max_size() ==
btm_cb.ble_ctr_cb.resolving_list_avail_size);
}
#endif
/*******************************************************************************
**
** Function btm_ble_enable_resolving_list_for_platform
**
** Description enable/disable resolving list feature depending on if any
** resolving list is empty and whitelist is involoved in the
** operation.
**
** Returns none
**
*******************************************************************************/
void btm_ble_enable_resolving_list_for_platform (UINT8 rl_mask)
{
/* if controller does not support, skip */
if (controller_get_interface()->get_ble_resolving_list_max_size() == 0) {
return;
}
if (btm_cb.ble_ctr_cb.wl_state == BTM_BLE_WL_IDLE) {
if (controller_get_interface()->get_ble_resolving_list_max_size() >
btm_cb.ble_ctr_cb.resolving_list_avail_size) {
btm_ble_enable_resolving_list(rl_mask);
} else {
btm_ble_disable_resolving_list(rl_mask, TRUE);
}
return;
}
tBTM_SEC_DEV_REC *p_dev = NULL;
list_node_t *p_node = NULL;
for (p_node = list_begin(btm_cb.p_sec_dev_rec_list); p_node; p_node = list_next(p_node)) {
p_dev = list_node(p_node);
if ((p_dev->ble.in_controller_list & BTM_RESOLVING_LIST_BIT) &&
(p_dev->ble.in_controller_list & BTM_WHITE_LIST_BIT)) {
btm_ble_enable_resolving_list(rl_mask);
return;
}
}
btm_ble_disable_resolving_list(rl_mask, TRUE);
}
/*******************************************************************************
**
** Function btm_ble_resolving_list_init
**
** Description Initialize resolving list in host stack
**
** Parameters Max resolving list size
**
** Returns void
**
*******************************************************************************/
void btm_ble_resolving_list_init(UINT8 max_irk_list_sz)
{
tBTM_BLE_RESOLVE_Q *p_q = &btm_cb.ble_ctr_cb.resolving_list_pend_q;
UINT8 irk_mask_size = (max_irk_list_sz % 8) ?
(max_irk_list_sz / 8 + 1) : (max_irk_list_sz / 8);
if (max_irk_list_sz > 0) {
p_q->resolve_q_random_pseudo = (BD_ADDR *)osi_malloc(sizeof(BD_ADDR) * max_irk_list_sz);
p_q->resolve_q_action = (UINT8 *)osi_malloc(max_irk_list_sz);
/* RPA offloading feature */
if (btm_cb.ble_ctr_cb.irk_list_mask == NULL) {
btm_cb.ble_ctr_cb.irk_list_mask = (UINT8 *)osi_malloc(irk_mask_size);
}
BTM_TRACE_DEBUG ("%s max_irk_list_sz = %d", __func__, max_irk_list_sz);
}
controller_get_interface()->set_ble_resolving_list_max_size(max_irk_list_sz);
btm_ble_clear_resolving_list();
btm_cb.ble_ctr_cb.resolving_list_avail_size = max_irk_list_sz;
}
/*******************************************************************************
**
** Function btm_ble_resolving_list_cleanup
**
** Description Cleanup resolving list dynamic memory
**
** Parameters
**
** Returns void
**
*******************************************************************************/
void btm_ble_resolving_list_cleanup(void)
{
tBTM_BLE_RESOLVE_Q *p_q = &btm_cb.ble_ctr_cb.resolving_list_pend_q;
if (p_q->resolve_q_random_pseudo) {
osi_free(p_q->resolve_q_random_pseudo);
p_q->resolve_q_random_pseudo = NULL;
}
if (p_q->resolve_q_action) {
osi_free(p_q->resolve_q_action);
p_q->resolve_q_action = NULL;
}
controller_get_interface()->set_ble_resolving_list_max_size(0);
if (btm_cb.ble_ctr_cb.irk_list_mask) {
osi_free(btm_cb.ble_ctr_cb.irk_list_mask);
btm_cb.ble_ctr_cb.irk_list_mask = NULL;
}
}
void btm_ble_add_default_entry_to_resolving_list(void)
{
/*
* Add local IRK entry with 00:00:00:00:00:00 address. This entry will
* be used to generate RPA for non-directed advertising if own_addr_type
* is set to rpa_pub since we use all-zero address as peer addres in
* such case. Peer IRK should be left all-zero since this is not for an
* actual peer.
*/
BD_ADDR peer_addr = {0x0, 0x0, 0x0, 0x0, 0x0, 0x0};
BT_OCTET16 peer_irk = {0x0};
btsnd_hcic_ble_add_device_resolving_list (BLE_ADDR_PUBLIC, peer_addr, peer_irk, btm_cb.devcb.id_keys.irk);
}
#endif
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