diff options
Diffstat (limited to 'stack/btm/btm_ble_bgconn.c')
| -rw-r--r-- | stack/btm/btm_ble_bgconn.c | 616 |
1 files changed, 616 insertions, 0 deletions
diff --git a/stack/btm/btm_ble_bgconn.c b/stack/btm/btm_ble_bgconn.c new file mode 100644 index 0000000..aa002e8 --- /dev/null +++ b/stack/btm/btm_ble_bgconn.c @@ -0,0 +1,616 @@ +/****************************************************************************** + * + * 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 + |