1 /******************************************************************************
2 *
3 * Copyright (C) 1999-2012 Broadcom Corporation
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 ******************************************************************************/
18
19 /******************************************************************************
20 *
21 * This file contains functions for BLE whitelist operation.
22 *
23 ******************************************************************************/
24
25 #include <string.h>
26 #include "common/bt_trace.h"
27 #include "device/controller.h"
28 #include "osi/allocator.h"
29 #include "osi/hash_map.h"
30 #include "stack/bt_types.h"
31 #include "stack/btu.h"
32 #include "btm_int.h"
33 #include "l2c_int.h"
34 #include "stack/hcimsgs.h"
35 //#include "bt_utils.h"
36
37 #ifndef BTM_BLE_SCAN_PARAM_TOUT
38 #define BTM_BLE_SCAN_PARAM_TOUT 50 /* 50 seconds */
39 #endif
40
41 #if (BLE_INCLUDED == TRUE)
42
43 static void btm_suspend_wl_activity(tBTM_BLE_WL_STATE wl_state);
44 static void btm_wl_update_to_controller(void);
45
46 // Unfortunately (for now?) we have to maintain a copy of the device whitelist
47 // on the host to determine if a device is pending to be connected or not. This
48 // controls whether the host should keep trying to scan for whitelisted
49 // peripherals or not.
50 // TODO: Move all of this to controller/le/background_list or similar?
51 static const size_t background_connection_buckets = 42;
52 static hash_map_t *background_connections = NULL;
53
54 typedef struct background_connection_t {
55 bt_bdaddr_t address;
56 } background_connection_t;
57
bdaddr_equality_fn(const void * x,const void * y)58 static bool bdaddr_equality_fn(const void *x, const void *y)
59 {
60 return bdaddr_equals((bt_bdaddr_t *)x, (bt_bdaddr_t *)y);
61 }
62
background_connections_lazy_init(void)63 static void background_connections_lazy_init(void)
64 {
65 if (!background_connections) {
66 background_connections = hash_map_new(background_connection_buckets,
67 hash_function_bdaddr, NULL, osi_free_func, bdaddr_equality_fn);
68 assert(background_connections);
69 }
70 }
71
background_connection_add(bt_bdaddr_t * address)72 static BOOLEAN background_connection_add(bt_bdaddr_t *address)
73 {
74 assert(address);
75 background_connections_lazy_init();
76 background_connection_t *connection = hash_map_get(background_connections, address);
77 if (!connection) {
78 connection = osi_calloc(sizeof(background_connection_t));
79 connection->address = *address;
80 hash_map_set(background_connections, &(connection->address), connection);
81 return TRUE;
82 }
83 return FALSE;
84 }
85
background_connection_remove(bt_bdaddr_t * address)86 static BOOLEAN background_connection_remove(bt_bdaddr_t *address)
87 {
88 if (address && background_connections) {
89 return hash_map_erase(background_connections, address);
90 }
91 return FALSE;
92 }
93
background_connections_clear(void)94 static void background_connections_clear(void)
95 {
96 if (background_connections) {
97 hash_map_clear(background_connections);
98 }
99 }
100
background_connections_pending_cb(hash_map_entry_t * hash_entry,void * context)101 static bool background_connections_pending_cb(hash_map_entry_t *hash_entry, void *context)
102 {
103 bool *pending_connections = context;
104 background_connection_t *connection = hash_entry->data;
105 const bool connected = BTM_IsAclConnectionUp(connection->address.address, BT_TRANSPORT_LE);
106 if (!connected) {
107 *pending_connections = true;
108 return false;
109 }
110 return true;
111 }
112
background_connections_pending(void)113 static bool background_connections_pending(void)
114 {
115 bool pending_connections = false;
116 if (background_connections) {
117 hash_map_foreach(background_connections, background_connections_pending_cb, &pending_connections);
118 }
119 return pending_connections;
120 }
121
122 /*******************************************************************************
123 **
124 ** Function btm_update_scanner_filter_policy
125 **
126 ** Description This function updates the filter policy of scanner
127 *******************************************************************************/
btm_update_scanner_filter_policy(tBTM_BLE_SFP scan_policy)128 void btm_update_scanner_filter_policy(tBTM_BLE_SFP scan_policy)
129 {
130 tBTM_BLE_INQ_CB *p_inq = &btm_cb.ble_ctr_cb.inq_var;
131
132 UINT32 scan_interval = !p_inq->scan_interval ? BTM_BLE_GAP_DISC_SCAN_INT : p_inq->scan_interval;
133 UINT32 scan_window = !p_inq->scan_window ? BTM_BLE_GAP_DISC_SCAN_WIN : p_inq->scan_window;
134
135 BTM_TRACE_EVENT ("%s\n", __func__);
136
137 p_inq->sfp = scan_policy;
138 p_inq->scan_type = p_inq->scan_type == BTM_BLE_SCAN_MODE_NONE ? BTM_BLE_SCAN_MODE_ACTI : p_inq->scan_type;
139
140 if (btm_cb.cmn_ble_vsc_cb.extended_scan_support == 0) {
141 btsnd_hcic_ble_set_scan_params(p_inq->scan_type, (UINT16)scan_interval,
142 (UINT16)scan_window,
143 btm_cb.ble_ctr_cb.addr_mgnt_cb.own_addr_type,
144 scan_policy);
145 } else {
146 btm_ble_send_extended_scan_params(p_inq->scan_type, scan_interval, scan_window,
147 btm_cb.ble_ctr_cb.addr_mgnt_cb.own_addr_type,
148 scan_policy);
149 }
150 }
151 /*******************************************************************************
152 **
153 ** Function btm_add_dev_to_controller
154 **
155 ** Description This function load the device into controller white list
156 *******************************************************************************/
btm_add_dev_to_controller(BOOLEAN to_add,BD_ADDR bd_addr,tBLE_ADDR_TYPE wl_addr_type)157 BOOLEAN btm_add_dev_to_controller (BOOLEAN to_add, BD_ADDR bd_addr, tBLE_ADDR_TYPE wl_addr_type)
158 {
159 /*
160 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev (bd_addr);
161 tBLE_ADDR_TYPE addr_type = BLE_ADDR_PUBLIC;
162 BOOLEAN started = FALSE;
163 BD_ADDR dummy_bda = {0};
164 tBT_DEVICE_TYPE dev_type;
165
166 if (p_dev_rec != NULL &&
167 p_dev_rec->device_type & BT_DEVICE_TYPE_BLE) {
168 if (to_add) {
169 if (p_dev_rec->ble.ble_addr_type == BLE_ADDR_PUBLIC || !BTM_BLE_IS_RESOLVE_BDA(bd_addr)) {
170 started = btsnd_hcic_ble_add_white_list (p_dev_rec->ble.ble_addr_type, bd_addr);
171 p_dev_rec->ble.in_controller_list |= BTM_WHITE_LIST_BIT;
172 } else if (memcmp(p_dev_rec->ble.static_addr, bd_addr, BD_ADDR_LEN) != 0 &&
173 memcmp(p_dev_rec->ble.static_addr, dummy_bda, BD_ADDR_LEN) != 0) {
174 started = btsnd_hcic_ble_add_white_list (p_dev_rec->ble.static_addr_type,
175 p_dev_rec->ble.static_addr);
176 p_dev_rec->ble.in_controller_list |= BTM_WHITE_LIST_BIT;
177 }
178 } else {
179 if (p_dev_rec->ble.ble_addr_type == BLE_ADDR_PUBLIC || !BTM_BLE_IS_RESOLVE_BDA(bd_addr)) {
180 started = btsnd_hcic_ble_remove_from_white_list (p_dev_rec->ble.ble_addr_type, bd_addr);
181 }
182 if (memcmp(p_dev_rec->ble.static_addr, dummy_bda, BD_ADDR_LEN) != 0 &&
183 memcmp(p_dev_rec->ble.static_addr, bd_addr, BD_ADDR_LEN) != 0) {
184 started = btsnd_hcic_ble_remove_from_white_list (p_dev_rec->ble.static_addr_type, p_dev_rec->ble.static_addr);
185 }
186 p_dev_rec->ble.in_controller_list &= ~BTM_WHITE_LIST_BIT;
187 }
188 } // if not a known device, shall we add it?
189 else {
190 BTM_ReadDevInfo(bd_addr, &dev_type, &addr_type);
191
192 if (to_add) {
193 started = btsnd_hcic_ble_add_white_list (addr_type, bd_addr);
194 }else{
195 started = btsnd_hcic_ble_remove_from_white_list (addr_type, bd_addr);
196 }
197 }
198
199 return started;
200 */
201
202 /* Controller do not support resolvable address now, only support public address and static random address */
203 BOOLEAN started = FALSE;
204 if(wl_addr_type > BLE_ADDR_RANDOM) {
205 BTM_TRACE_ERROR("wl_addr_type is error\n");
206 return started;
207 }
208
209 if (to_add) {
210 started = btsnd_hcic_ble_add_white_list (wl_addr_type, bd_addr);
211 }else{
212 started = btsnd_hcic_ble_remove_from_white_list (wl_addr_type, bd_addr);
213 }
214
215 return started;
216
217
218 }
219 /*******************************************************************************
220 **
221 ** Function btm_execute_wl_dev_operation
222 **
223 ** Description execute the pending whitelist device operation(loading or removing)
224 *******************************************************************************/
btm_execute_wl_dev_operation(void)225 BOOLEAN btm_execute_wl_dev_operation(void)
226 {
227 tBTM_BLE_WL_OP *p_dev_op = btm_cb.ble_ctr_cb.wl_op_q;
228 UINT8 i = 0;
229 BOOLEAN rt = TRUE;
230
231 for (i = 0; i < BTM_BLE_MAX_BG_CONN_DEV_NUM && rt; i ++, p_dev_op ++) {
232 if (p_dev_op->in_use) {
233 rt = btm_add_dev_to_controller(p_dev_op->to_add, p_dev_op->bd_addr, p_dev_op->addr_type);
234 memset(p_dev_op, 0, sizeof(tBTM_BLE_WL_OP));
235 } else {
236 break;
237 }
238 }
239 return rt;
240 }
241 /*******************************************************************************
242 **
243 ** Function btm_enq_wl_dev_operation
244 **
245 ** Description enqueue the pending whitelist device operation(loading or removing).
246 *******************************************************************************/
btm_enq_wl_dev_operation(BOOLEAN to_add,BD_ADDR bd_addr,tBLE_ADDR_TYPE addr_type)247 void btm_enq_wl_dev_operation(BOOLEAN to_add, BD_ADDR bd_addr, tBLE_ADDR_TYPE addr_type)
248 {
249 tBTM_BLE_WL_OP *p_dev_op = btm_cb.ble_ctr_cb.wl_op_q;
250 UINT8 i = 0;
251
252 for (i = 0; i < BTM_BLE_MAX_BG_CONN_DEV_NUM; i ++, p_dev_op ++) {
253 if (p_dev_op->in_use && p_dev_op->addr_type == addr_type && !memcmp(p_dev_op->bd_addr, bd_addr, BD_ADDR_LEN)) {
254 p_dev_op->to_add = to_add;
255 return;
256 } else if (!p_dev_op->in_use) {
257 break;
258 }
259 }
260 if (i != BTM_BLE_MAX_BG_CONN_DEV_NUM) {
261 p_dev_op->in_use = TRUE;
262 p_dev_op->to_add = to_add;
263 p_dev_op->addr_type = addr_type;
264 memcpy(p_dev_op->bd_addr, bd_addr, BD_ADDR_LEN);
265 } else {
266 BTM_TRACE_ERROR("max pending WL operation reached, discard");
267 }
268 return;
269 }
270
271 /*******************************************************************************
272 **
273 ** Function btm_update_dev_to_white_list
274 **
275 ** Description This function adds or removes a device into/from
276 ** the white list.
277 **
278 *******************************************************************************/
btm_update_dev_to_white_list(BOOLEAN to_add,BD_ADDR bd_addr,tBLE_ADDR_TYPE addr_type,tBTM_ADD_WHITELIST_CBACK * add_wl_cb)279 BOOLEAN btm_update_dev_to_white_list(BOOLEAN to_add, BD_ADDR bd_addr, tBLE_ADDR_TYPE addr_type, tBTM_ADD_WHITELIST_CBACK *add_wl_cb)
280 {
281 if(addr_type > BLE_ADDR_RANDOM) {
282 BTM_TRACE_ERROR("%s address type is error, unable to add device", __func__);
283 if (add_wl_cb){
284 add_wl_cb(HCI_ERR_ILLEGAL_PARAMETER_FMT,to_add);
285 }
286 return FALSE;
287 }
288
289 BD_ADDR invalid_rand_addr_a, invalid_rand_addr_b;
290 memset(invalid_rand_addr_a, 0xff, sizeof(BD_ADDR));
291 memset(invalid_rand_addr_b, 0x00, sizeof(BD_ADDR));
292
293 // look for public address information
294 tBTM_SEC_DEV_REC *p_dev_rec = btm_find_dev(bd_addr);
295 // p_dev_rec is created at bluetooth initialization, p_dev_rec->ble.static_addr maybe be all 0 before pairing
296 if(p_dev_rec && memcmp(invalid_rand_addr_b, p_dev_rec->ble.static_addr, BD_ADDR_LEN) != 0) {
297 memcpy(bd_addr, p_dev_rec->ble.static_addr, BD_ADDR_LEN);
298 addr_type = p_dev_rec->ble.static_addr_type;
299 }
300
301 // white list must be public address or static random address
302 if(addr_type == BLE_ADDR_RANDOM) {
303 /*
304 A static address is a 48-bit randomly generated address and shall meet the following requirements:
305 • The two most significant bits of the address shall be equal to 1
306 • All bits of the random part of the address shall not be equal to 1
307 • All bits of the random part of the address shall not be equal to 0
308 */
309 invalid_rand_addr_b[0] = invalid_rand_addr_b[0] | BT_STATIC_RAND_ADDR_MASK;
310 if((bd_addr[0] & BT_STATIC_RAND_ADDR_MASK) == BT_STATIC_RAND_ADDR_MASK
311 && memcmp(invalid_rand_addr_a, bd_addr, BD_ADDR_LEN) != 0
312 && memcmp(invalid_rand_addr_b, bd_addr, BD_ADDR_LEN) != 0){
313 // do nothing
314 } else {
315 BTC_TRACE_ERROR(" controller not support resolvable address");
316 if (add_wl_cb){
317 add_wl_cb(HCI_ERR_ILLEGAL_PARAMETER_FMT,to_add);
318 }
319 return FALSE;
320 }
321
322 }
323
324 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
325
326 if (to_add && p_cb->white_list_avail_size == 0) {
327 BTM_TRACE_ERROR("%s Whitelist full, unable to add device", __func__);
328 if (add_wl_cb){
329 add_wl_cb(HCI_ERR_MEMORY_FULL,to_add);
330 }
331 return FALSE;
332 }
333
334 if (to_add) {
335 /* added the bd_addr to the connection hash map queue */
336 if(!background_connection_add((bt_bdaddr_t *)bd_addr)) {
337 /* if the bd_addr already exist in whitelist, just callback return TRUE */
338 if (add_wl_cb){
339 add_wl_cb(HCI_SUCCESS,to_add);
340 }
341 return TRUE;
342 }
343 } else {
344 /* remove the bd_addr to the connection hash map queue */
345 if(!background_connection_remove((bt_bdaddr_t *)bd_addr)){
346 /* if the bd_addr don't exist in whitelist, just callback return TRUE */
347 if (add_wl_cb){
348 add_wl_cb(HCI_SUCCESS,to_add);
349 }
350 return TRUE;
351 }
352 }
353
354 if (add_wl_cb){
355 //save add whitelist complete callback
356 p_cb->add_wl_cb = add_wl_cb;
357 }
358 /* stop the auto connect */
359 btm_suspend_wl_activity(p_cb->wl_state);
360 /* save the bd_addr to the btm_cb env */
361 btm_enq_wl_dev_operation(to_add, bd_addr, addr_type);
362 /* save the ba_addr to the controller white list */
363 btm_wl_update_to_controller();
364 return TRUE;
365 }
366
367 /*******************************************************************************
368 **
369 ** Function btm_ble_clear_white_list
370 **
371 ** Description This function clears the white list.
372 **
373 *******************************************************************************/
btm_ble_clear_white_list(void)374 void btm_ble_clear_white_list (void)
375 {
376 BTM_TRACE_EVENT ("btm_ble_clear_white_list");
377 btsnd_hcic_ble_clear_white_list();
378 background_connections_clear();
379 }
380
381 /*******************************************************************************
382 **
383 ** Function btm_ble_clear_white_list_complete
384 **
385 ** Description Indicates white list cleared.
386 **
387 *******************************************************************************/
btm_ble_clear_white_list_complete(UINT8 * p_data,UINT16 evt_len)388 void btm_ble_clear_white_list_complete(UINT8 *p_data, UINT16 evt_len)
389 {
390 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
391 UINT8 status;
392 UNUSED(evt_len);
393
394 BTM_TRACE_EVENT ("btm_ble_clear_white_list_complete");
395 STREAM_TO_UINT8 (status, p_data);
396
397 if (status == HCI_SUCCESS) {
398 p_cb->white_list_avail_size = controller_get_interface()->get_ble_white_list_size();
399 } else {
400 BTM_TRACE_ERROR ("%s failed, status 0x%x\n", __func__, status);
401 }
402 }
403
404 /*******************************************************************************
405 **
406 ** Function btm_ble_white_list_init
407 **
408 ** Description Initialize white list size
409 **
410 *******************************************************************************/
btm_ble_white_list_init(UINT8 white_list_size)411 void btm_ble_white_list_init(UINT8 white_list_size)
412 {
413 BTM_TRACE_DEBUG("%s white_list_size = %d", __func__, white_list_size);
414 btm_cb.ble_ctr_cb.white_list_avail_size = white_list_size;
415 }
416
417 /*******************************************************************************
418 **
419 ** Function btm_ble_add_2_white_list_complete
420 **
421 ** Description White list element added
422 **
423 *******************************************************************************/
btm_ble_add_2_white_list_complete(UINT8 status)424 void btm_ble_add_2_white_list_complete(UINT8 status)
425 {
426 BTM_TRACE_EVENT("%s status=%d", __func__, status);
427 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
428 if (status == HCI_SUCCESS) {
429 --btm_cb.ble_ctr_cb.white_list_avail_size;
430 }
431 // add whitelist complete callback
432 if (p_cb->add_wl_cb)
433 {
434 (*p_cb->add_wl_cb)(status, BTM_WHITELIST_ADD);
435 }
436
437 }
438
439 /*******************************************************************************
440 **
441 ** Function btm_ble_remove_from_white_list_complete
442 **
443 ** Description White list element removal complete
444 **
445 *******************************************************************************/
btm_ble_remove_from_white_list_complete(UINT8 * p,UINT16 evt_len)446 void btm_ble_remove_from_white_list_complete(UINT8 *p, UINT16 evt_len)
447 {
448 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
449 UNUSED(evt_len);
450 BTM_TRACE_EVENT ("%s status=%d", __func__, *p);
451 if (*p == HCI_SUCCESS) {
452 ++btm_cb.ble_ctr_cb.white_list_avail_size;
453 }
454 if (p_cb->add_wl_cb)
455 {
456 (*p_cb->add_wl_cb)(*p, BTM_WHITELIST_REMOVE);
457 }
458 }
459
460 /*******************************************************************************
461 **
462 ** Function btm_ble_start_auto_conn
463 **
464 ** Description This function is to start/stop auto connection procedure.
465 **
466 ** Parameters start: TRUE to start; FALSE to stop.
467 **
468 ** Returns void
469 **
470 *******************************************************************************/
btm_ble_start_auto_conn(BOOLEAN start)471 BOOLEAN btm_ble_start_auto_conn(BOOLEAN start)
472 {
473 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
474 BD_ADDR dummy_bda = {0};
475 BOOLEAN exec = TRUE;
476 UINT16 scan_int;
477 UINT16 scan_win;
478 UINT8 own_addr_type = p_cb->addr_mgnt_cb.own_addr_type;
479 UINT8 peer_addr_type = BLE_ADDR_PUBLIC;
480
481 if (start) {
482 if (p_cb->conn_state == BLE_CONN_IDLE && background_connections_pending()
483 && btm_ble_topology_check(BTM_BLE_STATE_INIT)) {
484 p_cb->wl_state |= BTM_BLE_WL_INIT;
485
486 btm_execute_wl_dev_operation();
487
488 #if BLE_PRIVACY_SPT == TRUE
489 btm_ble_enable_resolving_list_for_platform(BTM_BLE_RL_INIT);
490 #endif
491 scan_int = (p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF) ?
492 BTM_BLE_SCAN_SLOW_INT_1 : p_cb->scan_int;
493 scan_win = (p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF) ?
494 BTM_BLE_SCAN_SLOW_WIN_1 : p_cb->scan_win;
495
496 #if BLE_PRIVACY_SPT == TRUE
497 if (btm_cb.ble_ctr_cb.rl_state != BTM_BLE_RL_IDLE
498 && controller_get_interface()->supports_ble_privacy()) {
499 own_addr_type |= BLE_ADDR_TYPE_ID_BIT;
500 peer_addr_type |= BLE_ADDR_TYPE_ID_BIT;
501 }
502 #endif
503
504 if (!btsnd_hcic_ble_create_ll_conn (scan_int, /* UINT16 scan_int */
505 scan_win, /* UINT16 scan_win */
506 0x01, /* UINT8 white_list */
507 peer_addr_type, /* UINT8 addr_type_peer */
508 dummy_bda, /* BD_ADDR bda_peer */
509 own_addr_type, /* UINT8 addr_type_own */
510 BTM_BLE_CONN_INT_MIN_DEF, /* UINT16 conn_int_min */
511 BTM_BLE_CONN_INT_MAX_DEF, /* UINT16 conn_int_max */
512 BTM_BLE_CONN_SLAVE_LATENCY_DEF, /* UINT16 conn_latency */
513 BTM_BLE_CONN_TIMEOUT_DEF, /* UINT16 conn_timeout */
514 0, /* UINT16 min_len */
515 0)) { /* UINT16 max_len */
516 /* start auto connection failed */
517 exec = FALSE;
518 p_cb->wl_state &= ~BTM_BLE_WL_INIT;
519 } else {
520 btm_ble_set_conn_st (BLE_BG_CONN);
521 }
522 } else {
523 exec = FALSE;
524 }
525 } else {
526 if (p_cb->conn_state == BLE_BG_CONN) {
527 btsnd_hcic_ble_create_conn_cancel();
528 btm_ble_set_conn_st (BLE_CONN_CANCEL);
529 p_cb->wl_state &= ~BTM_BLE_WL_INIT;
530 } else {
531 BTM_TRACE_DEBUG("conn_st = %d, not in auto conn state, cannot stop", p_cb->conn_state);
532 exec = FALSE;
533 }
534 }
535 return exec;
536 }
537
538 /*******************************************************************************
539 **
540 ** Function btm_ble_start_select_conn
541 **
542 ** Description This function is to start/stop selective connection procedure.
543 **
544 ** Parameters start: TRUE to start; FALSE to stop.
545 ** p_select_cback: callback function to return application
546 ** selection.
547 **
548 ** Returns BOOLEAN: selective connection procedure is started.
549 **
550 *******************************************************************************/
btm_ble_start_select_conn(BOOLEAN start,tBTM_BLE_SEL_CBACK * p_select_cback)551 BOOLEAN btm_ble_start_select_conn(BOOLEAN start, tBTM_BLE_SEL_CBACK *p_select_cback)
552 {
553 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
554 UINT32 scan_int = p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF ? BTM_BLE_SCAN_FAST_INT : p_cb->scan_int;
555 UINT32 scan_win = p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF ? BTM_BLE_SCAN_FAST_WIN : p_cb->scan_win;
556
557 BTM_TRACE_EVENT ("%s", __func__);
558
559 if (start) {
560 if (!BTM_BLE_IS_SCAN_ACTIVE(p_cb->scan_activity)) {
561 if (p_select_cback != NULL) {
562 btm_cb.ble_ctr_cb.p_select_cback = p_select_cback;
563 }
564
565 btm_execute_wl_dev_operation();
566
567 btm_update_scanner_filter_policy(SP_ADV_WL);
568 btm_cb.ble_ctr_cb.inq_var.scan_type = BTM_BLE_SCAN_MODE_PASS;
569
570 /* Process advertising packets only from devices in the white list */
571 if (btm_cb.cmn_ble_vsc_cb.extended_scan_support == 0) {
572 /* use passive scan by default */
573 if (!btsnd_hcic_ble_set_scan_params(BTM_BLE_SCAN_MODE_PASS,
574 scan_int,
575 scan_win,
576 p_cb->addr_mgnt_cb.own_addr_type,
577 SP_ADV_WL)) {
578 return FALSE;
579 }
580 } else {
581 if (!btm_ble_send_extended_scan_params(BTM_BLE_SCAN_MODE_PASS,
582 scan_int,
583 scan_win,
584 p_cb->addr_mgnt_cb.own_addr_type,
585 SP_ADV_WL)) {
586 return FALSE;
587 }
588 }
589
590 if (!btm_ble_topology_check(BTM_BLE_STATE_PASSIVE_SCAN)) {
591 BTM_TRACE_ERROR("peripheral device cannot initiate passive scan for a selective connection");
592 return FALSE;
593 } else if (background_connections_pending()) {
594 #if BLE_PRIVACY_SPT == TRUE
595 btm_ble_enable_resolving_list_for_platform(BTM_BLE_RL_SCAN);
596 #endif
597 if (!btsnd_hcic_ble_set_scan_enable(TRUE, TRUE)) { /* duplicate filtering enabled */
598 return FALSE;
599 }
600 /* mark up inquiry status flag */
601 p_cb->scan_activity |= BTM_LE_SELECT_CONN_ACTIVE;
602 p_cb->wl_state |= BTM_BLE_WL_SCAN;
603 }
604 } else {
605 BTM_TRACE_ERROR("scan active, can not start selective connection procedure");
606 return FALSE;
607 }
608 } else { /* disable selective connection mode */
609 p_cb->scan_activity &= ~BTM_LE_SELECT_CONN_ACTIVE;
610 p_cb->p_select_cback = NULL;
611 p_cb->wl_state &= ~BTM_BLE_WL_SCAN;
612
613 /* stop scanning */
614 if (!BTM_BLE_IS_SCAN_ACTIVE(p_cb->scan_activity)) {
615 btm_ble_stop_scan(); /* duplicate filtering enabled */
616 }
617 }
618 return TRUE;
619 }
620 /*******************************************************************************
621 **
622 ** Function btm_ble_initiate_select_conn
623 **
624 ** Description This function is to start/stop selective connection procedure.
625 **
626 ** Parameters start: TRUE to start; FALSE to stop.
627 ** p_select_cback: callback function to return application
628 ** selection.
629 **
630 ** Returns BOOLEAN: selective connection procedure is started.
631 **
632 *******************************************************************************/
btm_ble_initiate_select_conn(BD_ADDR bda)633 void btm_ble_initiate_select_conn(BD_ADDR bda)
634 {
635 BTM_TRACE_EVENT ("btm_ble_initiate_select_conn");
636
637 /* use direct connection procedure to initiate connection */
638 if (!L2CA_ConnectFixedChnl(L2CAP_ATT_CID, bda, BLE_ADDR_UNKNOWN_TYPE, FALSE)) {
639 BTM_TRACE_ERROR("btm_ble_initiate_select_conn failed");
640 }
641 }
642 /*******************************************************************************
643 **
644 ** Function btm_ble_suspend_bg_conn
645 **
646 ** Description This function is to suspend an active background connection
647 ** procedure.
648 **
649 ** Parameters none.
650 **
651 ** Returns none.
652 **
653 *******************************************************************************/
btm_ble_suspend_bg_conn(void)654 BOOLEAN btm_ble_suspend_bg_conn(void)
655 {
656 BTM_TRACE_EVENT ("%s\n", __func__);
657
658 if (btm_cb.ble_ctr_cb.bg_conn_type == BTM_BLE_CONN_AUTO) {
659 return btm_ble_start_auto_conn(FALSE);
660 } else if (btm_cb.ble_ctr_cb.bg_conn_type == BTM_BLE_CONN_SELECTIVE) {
661 return btm_ble_start_select_conn(FALSE, NULL);
662 }
663
664 return FALSE;
665 }
666 /*******************************************************************************
667 **
668 ** Function btm_suspend_wl_activity
669 **
670 ** Description This function is to suspend white list related activity
671 **
672 ** Returns none.
673 **
674 *******************************************************************************/
btm_suspend_wl_activity(tBTM_BLE_WL_STATE wl_state)675 static void btm_suspend_wl_activity(tBTM_BLE_WL_STATE wl_state)
676 {
677 if (wl_state & BTM_BLE_WL_INIT) {
678 btm_ble_start_auto_conn(FALSE);
679 }
680 if (wl_state & BTM_BLE_WL_SCAN) {
681 btm_ble_start_select_conn(FALSE, NULL);
682 }
683 if (wl_state & BTM_BLE_WL_ADV) {
684 btm_ble_stop_adv();
685 }
686
687 }
688 /*******************************************************************************
689 **
690 ** Function btm_resume_wl_activity
691 **
692 ** Description This function is to resume white list related activity
693 **
694 ** Returns none.
695 **
696 *******************************************************************************/
btm_resume_wl_activity(tBTM_BLE_WL_STATE wl_state)697 void btm_resume_wl_activity(tBTM_BLE_WL_STATE wl_state)
698 {
699 btm_ble_resume_bg_conn();
700 if (wl_state & BTM_BLE_WL_ADV) {
701 btm_ble_start_adv();
702 }
703
704 }
705
706 /*******************************************************************************
707 **
708 ** Function btm_wl_update_to_controller
709 **
710 ** Description This function is to update white list to controller
711 **
712 ** Returns none.
713 **
714 *******************************************************************************/
btm_wl_update_to_controller(void)715 static void btm_wl_update_to_controller(void)
716 {
717 /* whitelist will be added in the btm_ble_resume_bg_conn(), we do not
718 support background connection now, so we nedd to use btm_execute_wl_dev_operation
719 to add whitelist directly ,if we support background connection in the future,
720 please delete btm_execute_wl_dev_operation(). */
721 btm_execute_wl_dev_operation();
722
723 }
724 /*******************************************************************************
725 **
726 ** Function btm_ble_resume_bg_conn
727 **
728 ** Description This function is to resume a background auto connection
729 ** procedure.
730 **
731 ** Parameters none.
732 **
733 ** Returns none.
734 **
735 *******************************************************************************/
btm_ble_resume_bg_conn(void)736 BOOLEAN btm_ble_resume_bg_conn(void)
737 {
738 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
739 BOOLEAN ret = FALSE;
740
741 if (p_cb->bg_conn_type != BTM_BLE_CONN_NONE) {
742 if (p_cb->bg_conn_type == BTM_BLE_CONN_AUTO) {
743 ret = btm_ble_start_auto_conn(TRUE);
744 }
745
746 if (p_cb->bg_conn_type == BTM_BLE_CONN_SELECTIVE) {
747 ret = btm_ble_start_select_conn(TRUE, btm_cb.ble_ctr_cb.p_select_cback);
748 }
749 }
750
751 return ret;
752 }
753 /*******************************************************************************
754 **
755 ** Function btm_ble_get_conn_st
756 **
757 ** Description This function get BLE connection state
758 **
759 ** Returns connection state
760 **
761 *******************************************************************************/
btm_ble_get_conn_st(void)762 tBTM_BLE_CONN_ST btm_ble_get_conn_st(void)
763 {
764 return btm_cb.ble_ctr_cb.conn_state;
765 }
766 /*******************************************************************************
767 **
768 ** Function btm_ble_set_conn_st
769 **
770 ** Description This function set BLE connection state
771 **
772 ** Returns None.
773 **
774 *******************************************************************************/
btm_ble_set_conn_st(tBTM_BLE_CONN_ST new_st)775 void btm_ble_set_conn_st(tBTM_BLE_CONN_ST new_st)
776 {
777 btm_cb.ble_ctr_cb.conn_state = new_st;
778
779 if (new_st == BLE_BG_CONN || new_st == BLE_DIR_CONN) {
780 btm_ble_set_topology_mask(BTM_BLE_STATE_INIT_BIT);
781 } else {
782 btm_ble_clear_topology_mask(BTM_BLE_STATE_INIT_BIT);
783 }
784 }
785
786 /*******************************************************************************
787 **
788 ** Function btm_ble_enqueue_direct_conn_req
789 **
790 ** Description This function enqueue the direct connection request
791 **
792 ** Returns None.
793 **
794 *******************************************************************************/
btm_ble_enqueue_direct_conn_req(void * p_param)795 void btm_ble_enqueue_direct_conn_req(void *p_param)
796 {
797 tBTM_BLE_CONN_REQ *p = (tBTM_BLE_CONN_REQ *)osi_malloc(sizeof(tBTM_BLE_CONN_REQ));
798
799 p->p_param = p_param;
800
801 fixed_queue_enqueue(btm_cb.ble_ctr_cb.conn_pending_q, p, FIXED_QUEUE_MAX_TIMEOUT);
802 }
803 /*******************************************************************************
804 **
805 ** Function btm_send_pending_direct_conn
806 **
807 ** Description This function send the pending direct connection request in queue
808 **
809 ** Returns TRUE if started, FALSE otherwise
810 **
811 *******************************************************************************/
btm_send_pending_direct_conn(void)812 BOOLEAN btm_send_pending_direct_conn(void)
813 {
814 tBTM_BLE_CONN_REQ *p_req;
815 BOOLEAN rt = FALSE;
816
817 p_req = (tBTM_BLE_CONN_REQ*)fixed_queue_dequeue(btm_cb.ble_ctr_cb.conn_pending_q, 0);
818 if (p_req != NULL) {
819 rt = l2cble_init_direct_conn((tL2C_LCB *)(p_req->p_param));
820
821 osi_free((void *)p_req);
822 }
823
824 return rt;
825 }
826
827 #endif
828
