/******************************************************************************
*
* 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 whitelist operation.
*
******************************************************************************/
#include <string.h>
#include "bt_types.h"
#include "btu.h"
#include "btm_int.h"
#include "l2c_int.h"
#include "hcimsgs.h"
#ifndef BTM_BLE_SCAN_PARAM_TOUT
#define BTM_BLE_SCAN_PARAM_TOUT 50 /* 50 seconds */
#endif
#if (BLE_INCLUDED == TRUE)
/*******************************************************************************
**
** Function btm_update_scanner_filter_policy
**
** Description This function update the filter policy of scnner or advertiser.
*******************************************************************************/
void btm_update_scanner_filter_policy(tBTM_BLE_SFP scan_policy)
{
tBTM_BLE_INQ_CB *p_inq = &btm_cb.ble_ctr_cb.inq_var;
BTM_TRACE_EVENT0 ("btm_update_scanner_filter_policy");
btm_cb.ble_ctr_cb.inq_var.sfp = scan_policy;
btsnd_hcic_ble_set_scan_params ((UINT8)((p_inq->scan_type == BTM_BLE_SCAN_MODE_NONE) ? BTM_BLE_SCAN_MODE_ACTI: p_inq->scan_type),
(UINT16)(!p_inq->scan_interval ? BTM_BLE_GAP_DISC_SCAN_INT : p_inq->scan_interval),
(UINT16)(!p_inq->scan_window ? BTM_BLE_GAP_DISC_SCAN_WIN : p_inq->scan_window),
BLE_ADDR_PUBLIC,
scan_policy);
}
/*******************************************************************************
**
** Function btm_update_adv_filter_policy
**
** Description This function update the filter policy of scnner or advertiser.
*******************************************************************************/
void btm_update_adv_filter_policy(tBTM_BLE_AFP adv_policy)
{
tBTM_BLE_INQ_CB *p_cb = &btm_cb.ble_ctr_cb.inq_var;
BTM_TRACE_EVENT0 ("btm_update_adv_filter_policy");
p_cb->afp = adv_policy;
}
/*******************************************************************************
**
** Function btm_update_dev_to_white_list
**
** Description This function adds a device into white list.
*******************************************************************************/
BOOLEAN btm_update_dev_to_white_list(BOOLEAN to_add, BD_ADDR bd_addr, tBLE_ADDR_TYPE addr_type)
{
/* look up the sec device record, and find the address */
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
tBTM_SEC_DEV_REC *p_dev_rec;
BD_ADDR dummy_bda = {0};
BOOLEAN started = FALSE, suspend = FALSE;
if (btm_cb.btm_inq_vars.inq_active)
{
suspend = TRUE;
btsnd_hcic_ble_set_scan_enable (BTM_BLE_SCAN_DISABLE, BTM_BLE_DUPLICATE_ENABLE);
}
if ((p_dev_rec = btm_find_dev (bd_addr)) != NULL &&
p_dev_rec->device_type == BT_DEVICE_TYPE_BLE)
{
BTM_TRACE_DEBUG0("btm_update_dev_to_white_list 1");
if ((to_add && p_cb->num_empty_filter == 0) ||
(!to_add && p_cb->num_empty_filter == p_cb->max_filter_entries))
{
BTM_TRACE_ERROR1("num_entry available in controller: %d", p_cb->num_empty_filter);
return started;
}
if ( p_dev_rec->ble.ble_addr_type == BLE_ADDR_PUBLIC)
{
if (to_add)
started = btsnd_hcic_ble_add_white_list (BLE_ADDR_PUBLIC, bd_addr);
else
started = btsnd_hcic_ble_remove_from_white_list (BLE_ADDR_PUBLIC, bd_addr);
}
else
{
if (BLE_ADDR_IS_STATIC(bd_addr))
{
if (to_add)
started = btsnd_hcic_ble_add_white_list (BLE_ADDR_RANDOM, bd_addr);
else
started = btsnd_hcic_ble_remove_from_white_list (BLE_ADDR_RANDOM, bd_addr);
}
if (memcmp(p_dev_rec->ble.reconn_addr, dummy_bda, BD_ADDR_LEN) != 0)
{
if (to_add)
started = btsnd_hcic_ble_add_white_list (BLE_ADDR_RANDOM, p_dev_rec->ble.reconn_addr);
else
started = btsnd_hcic_ble_remove_from_white_list (BLE_ADDR_RANDOM, p_dev_rec->ble.reconn_addr);
}
}
}
/* if not a known device, shall we add it? */
else
{
if (to_add)
started = btsnd_hcic_ble_add_white_list (addr_type, bd_addr);
else
started = btsnd_hcic_ble_remove_from_white_list (addr_type, bd_addr);
}
if (suspend)
{
btsnd_hcic_ble_set_scan_enable (BTM_BLE_SCAN_ENABLE, BTM_BLE_DUPLICATE_DISABLE);
}
return started;
}
/*******************************************************************************
**
** Function btm_ble_clear_white_list
**
** Description This function clears the white list.
*******************************************************************************/
void btm_ble_clear_white_list (void)
{
BTM_TRACE_EVENT0 ("btm_ble_clear_white_list");
btsnd_hcic_ble_clear_white_list();
}
/*******************************************************************************
**
** Function btm_ble_clear_white_list_complete
**
** Description This function clears the white list complete.
*******************************************************************************/
void btm_ble_clear_white_list_complete(UINT8 *p_data, UINT16 evt_len)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT8 status;
BTM_TRACE_EVENT0 ("btm_ble_clear_white_list_complete");
STREAM_TO_UINT8 (status, p_data);
if (status == HCI_SUCCESS)
p_cb->num_empty_filter = p_cb->max_filter_entries;
}
/*******************************************************************************
**
** Function btm_ble_add_2_white_list_complete
**
** Description This function read the current white list size.
*******************************************************************************/
void btm_ble_add_2_white_list_complete(UINT8 *p, UINT16 evt_len)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
BTM_TRACE_EVENT0 ("btm_ble_add_2_white_list_complete");
if (*p == HCI_SUCCESS)
{
p_cb->num_empty_filter --;
}
}
/*******************************************************************************
**
** Function btm_ble_add_2_white_list_complete
**
** Description This function read the current white list size.
*******************************************************************************/
void btm_ble_remove_from_white_list_complete(UINT8 *p, UINT16 evt_len)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
BTM_TRACE_EVENT0 ("btm_ble_remove_from_white_list_complete");
if (*p == HCI_SUCCESS)
{
p_cb->num_empty_filter ++;
}
}
/*******************************************************************************
**
** Function btm_ble_find_dev_in_whitelist
**
** Description This function check if the device is in the white list
*******************************************************************************/
BOOLEAN btm_ble_find_dev_in_whitelist(BD_ADDR bd_addr)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT8 i;
BTM_TRACE_EVENT0 ("btm_ble_find_dev_in_whitelist");
/* empty wl */
if (p_cb->num_empty_filter == p_cb->max_filter_entries)
{
BTM_TRACE_DEBUG0("white list empty");
return FALSE;
}
for (i = 0; i < BTM_BLE_MAX_BG_CONN_DEV_NUM && i < p_cb->max_filter_entries; i ++)
{
if (memcmp(p_cb->bg_conn_dev_list[i], bd_addr, BD_ADDR_LEN) == 0)
return TRUE;
}
return FALSE;
}
/*******************************************************************************
**
** Function btm_ble_count_unconn_dev_in_whitelist
**
** Description This function check the number of unconnected device in white list.
*******************************************************************************/
UINT8 btm_ble_count_unconn_dev_in_whitelist(void)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT8 count = 0, i;
BD_ADDR dummy_bda ={0};
BTM_TRACE_EVENT0 ("btm_ble_find_dev_in_whitelist");
for (i = 0; i < BTM_BLE_MAX_BG_CONN_DEV_NUM && i < p_cb->max_filter_entries; i ++)
{
if (memcmp(p_cb->bg_conn_dev_list[i], dummy_bda, BD_ADDR_LEN) != 0 &&
!BTM_IsAclConnectionUp(p_cb->bg_conn_dev_list[i]))
{
count ++;
}
}
return count;
}
/*******************************************************************************
**
** Function btm_update_bg_conn_list
**
** Description This function update the local background connection device list.
*******************************************************************************/
BOOLEAN btm_update_bg_conn_list(BOOLEAN to_add, BD_ADDR bd_addr)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT8 i;
BD_ADDR dummy_bda = {0};
BTM_TRACE_EVENT0 ("btm_update_bg_conn_list");
if ((to_add && (p_cb->bg_conn_dev_num == BTM_BLE_MAX_BG_CONN_DEV_NUM || p_cb->num_empty_filter == 0)) ||
(!to_add && p_cb->num_empty_filter == p_cb->max_filter_entries))
{
BTM_TRACE_DEBUG1("num_empty_filter = %d", p_cb->num_empty_filter);
return FALSE;
}
for (i = 0; i < BTM_BLE_MAX_BG_CONN_DEV_NUM && i < p_cb->max_filter_entries; i ++)
{
/* to add */
if (memcmp(p_cb->bg_conn_dev_list[i], dummy_bda, BD_ADDR_LEN) == 0 && to_add)
{
memcpy(p_cb->bg_conn_dev_list[i], bd_addr, BD_ADDR_LEN);
p_cb->bg_conn_dev_num ++;
return TRUE;
}
/* to remove */
if (!to_add && memcmp(p_cb->bg_conn_dev_list[i], bd_addr, BD_ADDR_LEN) == 0)
{
memset(p_cb->bg_conn_dev_list[i], 0, BD_ADDR_LEN);
p_cb->bg_conn_dev_num --;
return TRUE;
}
}
return FALSE;
}
/*******************************************************************************
**
** Function btm_write_bg_conn_wl
**
** Description This function write background connection device list into
** controller.
*******************************************************************************/
void btm_write_bg_conn_wl(void)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT8 i;
BTM_TRACE_EVENT0 ("btm_write_bg_conn_wl");
btm_ble_clear_white_list();
for (i = 0; i < p_cb->bg_conn_dev_num; i ++)
{
if (!btm_update_dev_to_white_list(TRUE, p_cb->bg_conn_dev_list[i], BLE_ADDR_PUBLIC))
break;
}
return;
}
/*******************************************************************************
**
** Function btm_ble_start_auto_conn
**
** Description This function is to start/stop auto connection procedure.
**
** Parameters start: TRUE to start; FALSE to stop.
**
** Returns void
**
*******************************************************************************/
BOOLEAN btm_ble_start_auto_conn(BOOLEAN start)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
BD_ADDR dummy_bda = {0};
BOOLEAN exec = TRUE;
UINT16 scan_int, scan_win;
scan_int = (p_cb->scan_int == BTM_BLE_CONN_PARAM_UNDEF) ? BTM_BLE_CONN_EST_SCAN_INT : p_cb->scan_int;
scan_win = (p_cb->scan_win == BTM_BLE_CONN_PARAM_UNDEF) ? BTM_BLE_CONN_EST_SCAN_WIND : p_cb->scan_win;
if (start)
{
if (!l2cb.is_ble_connecting &&
btm_ble_count_unconn_dev_in_whitelist() > 0)
{
if (p_cb->bg_conn_state != BLE_BG_CONN_ACTIVE && p_cb->bg_conn_dev_num > 0)
{
if (!btsnd_hcic_ble_create_ll_conn (scan_int, /* UINT16 scan_int */
scan_win, /* UINT16 scan_win */
0x01, /* UINT8 white_list */
BLE_ADDR_PUBLIC, /* UINT8 addr_type_peer */
dummy_bda, /* BD_ADDR bda_peer */
BLE_ADDR_PUBLIC, /* UINT8 addr_type_own */
BTM_BLE_CONN_INT_MIN_DEF, /* UINT16 conn_int_min */
BTM_BLE_CONN_INT_MAX_DEF, /* UINT16 conn_int_max */
BTM_BLE_CONN_SLAVE_LATENCY_DEF, /* UINT16 conn_latency */
BTM_BLE_CONN_TIMEOUT_DEF, /* UINT16 conn_timeout */
0, /* UINT16 min_len */
0)) /* UINT16 max_len */
{
/* start auto connection failed */
exec = FALSE;
}
else
{
p_cb->bg_conn_state = BLE_BG_CONN_ACTIVE;
}
}
}
else
exec = FALSE;
}
else
{
if (p_cb->bg_conn_state == BLE_BG_CONN_ACTIVE)
{
if (!btsnd_hcic_ble_create_conn_cancel())
exec = FALSE;
else
p_cb->bg_conn_state = BLE_BG_CONN_IDLE;
}
}
return exec;
}
/*******************************************************************************
**
** Function btm_ble_start_select_conn
**
** Description This function is to start/stop selective connection procedure.
**
** Parameters start: TRUE to start; FALSE to stop.
** p_select_cback: callback function to return application
** selection.
**
** Returns BOOLEAN: selective connectino procedure is started.
**
*******************************************************************************/
BOOLEAN btm_ble_start_select_conn(BOOLEAN start,tBTM_BLE_SEL_CBACK *p_select_cback)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
UINT16 scan_int, scan_win;
BTM_TRACE_EVENT0 ("btm_ble_start_select_conn");
scan_int = (p_cb->scan_int == BTM_BLE_CONN_PARAM_UNDEF) ? BTM_BLE_CONN_EST_SCAN_INT : p_cb->scan_int;
scan_win = (p_cb->scan_win == BTM_BLE_CONN_PARAM_UNDEF) ? BTM_BLE_CONN_EST_SCAN_WIND : p_cb->scan_win;
if (start)
{
if (!btm_cb.btm_inq_vars.inq_active)
{
btm_cb.ble_ctr_cb.p_select_cback = p_select_cback;
btm_update_scanner_filter_policy(SP_ADV_WL);
if (!btsnd_hcic_ble_set_scan_params(BTM_BLE_SCAN_MODE_PASS, /* use passive scan by default */
scan_int, /* scan interval */
scan_win, /* scan window */
BLE_ADDR_PUBLIC, /* own device, DUMO always use public */
SP_ADV_WL) /* process advertising packets only from devices in the White List */
)
return FALSE;
if (p_cb->inq_var.adv_mode == BTM_BLE_ADV_ENABLE)
{
BTM_TRACE_ERROR0("peripheral device cannot initiate a selective connection");
return FALSE;
}
else if (p_cb->bg_conn_dev_num > 0 && btm_ble_count_unconn_dev_in_whitelist() > 0 )
{
if (!btsnd_hcic_ble_set_scan_enable(TRUE, TRUE)) /* duplicate filtering enabled */
return FALSE;
/* mark up inquiry status flag */
btm_cb.btm_inq_vars.inq_active = TRUE;
btm_cb.ble_ctr_cb.inq_var.proc_mode = BTM_BLE_SELECT_SCAN;
p_cb->bg_conn_state = BLE_BG_CONN_ACTIVE;
}
}
else
{
BTM_TRACE_ERROR0("scan active, can not start selective connection procedure");
return FALSE;
}
}
else /* disable selective connection mode */
{
p_cb->p_select_cback = NULL;
btm_cb.btm_inq_vars.inq_active = FALSE;
btm_cb.ble_ctr_cb.inq_var.proc_mode = BTM_BLE_INQUIRY_NONE;
btm_update_scanner_filter_policy(SP_ADV_ALL);
/* stop scanning */
if (p_cb->bg_conn_dev_num > 0)
{
if (!btsnd_hcic_ble_set_scan_enable(FALSE, TRUE)) /* duplicate filtering enabled */
return FALSE;
}
}
return TRUE;
}
/*******************************************************************************
**
** Function btm_ble_initiate_select_conn
**
** Description This function is to start/stop selective connection procedure.
**
** Parameters start: TRUE to start; FALSE to stop.
** p_select_cback: callback function to return application
** selection.
**
** Returns BOOLEAN: selective connectino procedure is started.
**
*******************************************************************************/
void btm_ble_initiate_select_conn(BD_ADDR bda)
{
UINT8 addr_type;
BTM_TRACE_EVENT0 ("btm_ble_initiate_select_conn");
addr_type = btm_ble_map_bda_to_conn_bda(bda);
/* use direct connection procedure to initiate connection */
if (!L2CA_ConnectFixedChnl(L2CAP_ATT_CID, bda))
{
BTM_TRACE_ERROR0("btm_ble_initiate_select_conn failed");
}
}
/*******************************************************************************
**
** Function btm_ble_suspend_bg_sele_conn
**
** Description This function is to suspend an active background connection
** procedure.
**
** Parameters none.
**
** Returns none.
**
*******************************************************************************/
void btm_ble_suspend_bg_sele_conn(void)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
BTM_TRACE_EVENT0 ("btm_ble_suspend_bg_sele_conn");
if (p_cb->bg_conn_type == BTM_BLE_CONN_SELECTIVE)
{
p_cb->bg_conn_state = BLE_BG_CONN_SUSPEND;
btm_ble_start_select_conn(FALSE, NULL);
}
}
/*******************************************************************************
**
** Function btm_ble_suspend_bg_conn
**
** Description This function is to suspend an active background connection
** procedure.
**
** Parameters none.
**
** Returns none.
**
*******************************************************************************/
void btm_ble_suspend_bg_conn(void)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
BTM_TRACE_EVENT0 ("btm_ble_suspend_bg_conn");
if (p_cb->bg_conn_type == BTM_BLE_CONN_AUTO)
{
if (btm_ble_start_auto_conn(FALSE))
p_cb->bg_conn_state = BLE_BG_CONN_SUSPEND;
}
}
/*******************************************************************************
**
** Function btm_ble_scan_param_idle
**
** Description This function is to process the scan parameter idle timeout
** timeout.
********************************************************************************/
void btm_ble_scan_param_idle(void)
{
BTM_BleSetConnScanParams(BTM_BLE_CONN_EST_SCAN_INT_LO, BTM_BLE_CONN_EST_SCAN_WIND_LO);
}
/*******************************************************************************
**
** Function btm_ble_resume_bg_conn
**
** Description This function is to resume a background auto connection
** procedure.
**
** Parameters none.
**
** Returns none.
**
*******************************************************************************/
BOOLEAN btm_ble_resume_bg_conn(tBTM_BLE_SEL_CBACK *p_sele_callback, BOOLEAN def_param)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
BOOLEAN ret = FALSE;
if (p_cb->bg_conn_state != BLE_BG_CONN_ACTIVE )
{
if (def_param)
{
p_cb->scan_int = BTM_BLE_CONN_PARAM_UNDEF;
p_cb->scan_win = BTM_BLE_CONN_PARAM_UNDEF;
/* start scan param idle timer */
btu_start_timer(&p_cb->scan_param_idle_timer,
BTU_TTYPE_BLE_SCAN_PARAM_IDLE,
BTM_BLE_SCAN_PARAM_TOUT);
}
if (p_cb->bg_conn_type == BTM_BLE_CONN_AUTO)
ret = btm_ble_start_auto_conn(TRUE);
if (p_cb->bg_conn_type == BTM_BLE_CONN_SELECTIVE)
{
/* terminate selective connection mode if all devices are connected */
if (btm_ble_count_unconn_dev_in_whitelist() == 0)
{
btsnd_hcic_ble_set_scan_enable (BTM_BLE_SCAN_DISABLE, BTM_BLE_DUPLICATE_DISABLE);
btm_cb.ble_ctr_cb.inq_var.proc_mode = BTM_BLE_INQUIRY_NONE;
btm_cb.btm_inq_vars.inq_active = FALSE;
}
else if (!btm_cb.btm_inq_vars.inq_active)
btm_ble_start_select_conn(TRUE, btm_cb.ble_ctr_cb.p_select_cback);
}
if (ret)
p_cb->bg_conn_state = BLE_BG_CONN_ACTIVE;
}
return ret;
}
/*******************************************************************************
**
** Function btm_ble_update_bg_state
**
** Description This function is to update the bg connection status.
**
** Parameters none.
**
** Returns none.
**
*******************************************************************************/
void btm_ble_update_bg_state(void)
{
tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
if (!l2cb.is_ble_connecting && (p_cb->bg_conn_state != BLE_BG_CONN_SUSPEND))
p_cb->bg_conn_state = BLE_BG_CONN_IDLE;
}
#endif