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_UPDATE_WHITELIST_CBACK * update_wl_cb)279 BOOLEAN btm_update_dev_to_white_list(BOOLEAN to_add, BD_ADDR bd_addr, tBLE_ADDR_TYPE addr_type, tBTM_UPDATE_WHITELIST_CBACK *update_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 (update_wl_cb){
284 update_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 // The device to be added to white list must be public address or 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(memcmp(invalid_rand_addr_a, bd_addr, BD_ADDR_LEN) != 0
311 && memcmp(invalid_rand_addr_b, bd_addr, BD_ADDR_LEN) != 0){
312 // do nothing
313 } else {
314 BTC_TRACE_ERROR(" controller not support resolvable address");
315 if (update_wl_cb){
316 update_wl_cb(HCI_ERR_ILLEGAL_PARAMETER_FMT,to_add);
317 }
318 return FALSE;
319 }
320
321 }
322
323 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
324
325 if (to_add && p_cb->white_list_avail_size == 0) {
326 BTM_TRACE_ERROR("%s Whitelist full, unable to add device", __func__);
327 if (update_wl_cb){
328 update_wl_cb(HCI_ERR_MEMORY_FULL,to_add);
329 }
330 return FALSE;
331 }
332
333 if (to_add) {
334 /* added the bd_addr to the connection hash map queue */
335 if(!background_connection_add((bt_bdaddr_t *)bd_addr)) {
336 /* if the bd_addr already exist in whitelist, just callback return TRUE */
337 if (update_wl_cb){
338 update_wl_cb(HCI_SUCCESS,to_add);
339 }
340 return TRUE;
341 }
342 } else {
343 /* remove the bd_addr to the connection hash map queue */
344 if(!background_connection_remove((bt_bdaddr_t *)bd_addr)){
345 /* if the bd_addr don't exist in whitelist, just callback return TRUE */
346 if (update_wl_cb){
347 update_wl_cb(HCI_SUCCESS,to_add);
348 }
349 return TRUE;
350 }
351 }
352
353 if (update_wl_cb){
354 //save add whitelist complete callback
355 p_cb->update_wl_cb = update_wl_cb;
356 }
357 /* stop the auto connect */
358 btm_suspend_wl_activity(p_cb->wl_state);
359 /* save the bd_addr to the btm_cb env */
360 btm_enq_wl_dev_operation(to_add, bd_addr, addr_type);
361 /* save the ba_addr to the controller white list */
362 btm_wl_update_to_controller();
363 return TRUE;
364 }
365
366 /*******************************************************************************
367 **
368 ** Function btm_ble_clear_white_list
369 **
370 ** Description This function clears the white list.
371 **
372 *******************************************************************************/
btm_ble_clear_white_list(tBTM_UPDATE_WHITELIST_CBACK * update_wl_cb)373 void btm_ble_clear_white_list (tBTM_UPDATE_WHITELIST_CBACK *update_wl_cb)
374 {
375 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
376
377 BTM_TRACE_EVENT ("btm_ble_clear_white_list");
378 btsnd_hcic_ble_clear_white_list();
379 background_connections_clear();
380
381 if (update_wl_cb) {
382 p_cb->update_wl_cb = update_wl_cb;
383 }
384 }
385
386 /*******************************************************************************
387 **
388 ** Function btm_ble_clear_white_list_complete
389 **
390 ** Description Indicates white list cleared.
391 **
392 *******************************************************************************/
btm_ble_clear_white_list_complete(UINT8 * p_data,UINT16 evt_len)393 void btm_ble_clear_white_list_complete(UINT8 *p_data, UINT16 evt_len)
394 {
395 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
396 UINT8 status;
397 UNUSED(evt_len);
398
399 BTM_TRACE_EVENT ("btm_ble_clear_white_list_complete");
400 STREAM_TO_UINT8 (status, p_data);
401
402 if (status == HCI_SUCCESS) {
403 p_cb->white_list_avail_size = controller_get_interface()->get_ble_white_list_size();
404 } else {
405 BTM_TRACE_ERROR ("%s failed, status 0x%x\n", __func__, status);
406 }
407
408 if (p_cb->update_wl_cb) {
409 (*p_cb->update_wl_cb)(status, BTM_WHITELIST_CLEAR);
410 }
411 }
412
413 /*******************************************************************************
414 **
415 ** Function btm_ble_white_list_init
416 **
417 ** Description Initialize white list size
418 **
419 *******************************************************************************/
btm_ble_white_list_init(UINT8 white_list_size)420 void btm_ble_white_list_init(UINT8 white_list_size)
421 {
422 BTM_TRACE_DEBUG("%s white_list_size = %d", __func__, white_list_size);
423 btm_cb.ble_ctr_cb.white_list_avail_size = white_list_size;
424 }
425
426 /*******************************************************************************
427 **
428 ** Function btm_ble_add_2_white_list_complete
429 **
430 ** Description White list element added
431 **
432 *******************************************************************************/
btm_ble_add_2_white_list_complete(UINT8 status)433 void btm_ble_add_2_white_list_complete(UINT8 status)
434 {
435 BTM_TRACE_EVENT("%s status=%d", __func__, status);
436 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
437 if (status == HCI_SUCCESS) {
438 --btm_cb.ble_ctr_cb.white_list_avail_size;
439 }
440 // add whitelist complete callback
441 if (p_cb->update_wl_cb)
442 {
443 (*p_cb->update_wl_cb)(status, BTM_WHITELIST_ADD);
444 }
445
446 }
447
448 /*******************************************************************************
449 **
450 ** Function btm_ble_remove_from_white_list_complete
451 **
452 ** Description White list element removal complete
453 **
454 *******************************************************************************/
btm_ble_remove_from_white_list_complete(UINT8 * p,UINT16 evt_len)455 void btm_ble_remove_from_white_list_complete(UINT8 *p, UINT16 evt_len)
456 {
457 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
458 UNUSED(evt_len);
459 BTM_TRACE_EVENT ("%s status=%d", __func__, *p);
460 if (*p == HCI_SUCCESS) {
461 ++btm_cb.ble_ctr_cb.white_list_avail_size;
462 }
463 if (p_cb->update_wl_cb)
464 {
465 (*p_cb->update_wl_cb)(*p, BTM_WHITELIST_REMOVE);
466 }
467 }
468
469 /*******************************************************************************
470 **
471 ** Function btm_ble_start_auto_conn
472 **
473 ** Description This function is to start/stop auto connection procedure.
474 **
475 ** Parameters start: TRUE to start; FALSE to stop.
476 **
477 ** Returns void
478 **
479 *******************************************************************************/
btm_ble_start_auto_conn(BOOLEAN start)480 BOOLEAN btm_ble_start_auto_conn(BOOLEAN start)
481 {
482 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
483 BD_ADDR dummy_bda = {0};
484 BOOLEAN exec = TRUE;
485 UINT16 scan_int;
486 UINT16 scan_win;
487 UINT8 own_addr_type = p_cb->addr_mgnt_cb.own_addr_type;
488 UINT8 peer_addr_type = BLE_ADDR_PUBLIC;
489
490 if (start) {
491 if (p_cb->conn_state == BLE_CONN_IDLE && background_connections_pending()
492 && btm_ble_topology_check(BTM_BLE_STATE_INIT)) {
493 p_cb->wl_state |= BTM_BLE_WL_INIT;
494
495 btm_execute_wl_dev_operation();
496
497 #if BLE_PRIVACY_SPT == TRUE
498 btm_ble_enable_resolving_list_for_platform(BTM_BLE_RL_INIT);
499 #endif
500 scan_int = (p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF) ?
501 BTM_BLE_SCAN_SLOW_INT_1 : p_cb->scan_int;
502 scan_win = (p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF) ?
503 BTM_BLE_SCAN_SLOW_WIN_1 : p_cb->scan_win;
504
505 #if BLE_PRIVACY_SPT == TRUE
506 if (btm_cb.ble_ctr_cb.rl_state != BTM_BLE_RL_IDLE
507 && controller_get_interface()->supports_ble_privacy()) {
508 own_addr_type |= BLE_ADDR_TYPE_ID_BIT;
509 peer_addr_type |= BLE_ADDR_TYPE_ID_BIT;
510 }
511 #endif
512
513 if (!btsnd_hcic_ble_create_ll_conn (scan_int, /* UINT16 scan_int */
514 scan_win, /* UINT16 scan_win */
515 0x01, /* UINT8 white_list */
516 peer_addr_type, /* UINT8 addr_type_peer */
517 dummy_bda, /* BD_ADDR bda_peer */
518 own_addr_type, /* UINT8 addr_type_own */
519 BTM_BLE_CONN_INT_MIN_DEF, /* UINT16 conn_int_min */
520 BTM_BLE_CONN_INT_MAX_DEF, /* UINT16 conn_int_max */
521 BTM_BLE_CONN_SLAVE_LATENCY_DEF, /* UINT16 conn_latency */
522 BTM_BLE_CONN_TIMEOUT_DEF, /* UINT16 conn_timeout */
523 0, /* UINT16 min_len */
524 0)) { /* UINT16 max_len */
525 /* start auto connection failed */
526 exec = FALSE;
527 p_cb->wl_state &= ~BTM_BLE_WL_INIT;
528 } else {
529 btm_ble_set_conn_st (BLE_BG_CONN);
530 }
531 } else {
532 exec = FALSE;
533 }
534 } else {
535 if (p_cb->conn_state == BLE_BG_CONN) {
536 btsnd_hcic_ble_create_conn_cancel();
537 btm_ble_set_conn_st (BLE_CONN_CANCEL);
538 p_cb->wl_state &= ~BTM_BLE_WL_INIT;
539 } else {
540 BTM_TRACE_DEBUG("conn_st = %d, not in auto conn state, cannot stop", p_cb->conn_state);
541 exec = FALSE;
542 }
543 }
544 return exec;
545 }
546
547 /*******************************************************************************
548 **
549 ** Function btm_ble_start_select_conn
550 **
551 ** Description This function is to start/stop selective connection procedure.
552 **
553 ** Parameters start: TRUE to start; FALSE to stop.
554 ** p_select_cback: callback function to return application
555 ** selection.
556 **
557 ** Returns BOOLEAN: selective connection procedure is started.
558 **
559 *******************************************************************************/
btm_ble_start_select_conn(BOOLEAN start,tBTM_BLE_SEL_CBACK * p_select_cback)560 BOOLEAN btm_ble_start_select_conn(BOOLEAN start, tBTM_BLE_SEL_CBACK *p_select_cback)
561 {
562 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
563 UINT32 scan_int = p_cb->scan_int == BTM_BLE_SCAN_PARAM_UNDEF ? BTM_BLE_SCAN_FAST_INT : p_cb->scan_int;
564 UINT32 scan_win = p_cb->scan_win == BTM_BLE_SCAN_PARAM_UNDEF ? BTM_BLE_SCAN_FAST_WIN : p_cb->scan_win;
565
566 BTM_TRACE_EVENT ("%s", __func__);
567
568 if (start) {
569 if (!BTM_BLE_IS_SCAN_ACTIVE(p_cb->scan_activity)) {
570 if (p_select_cback != NULL) {
571 btm_cb.ble_ctr_cb.p_select_cback = p_select_cback;
572 }
573
574 btm_execute_wl_dev_operation();
575
576 btm_update_scanner_filter_policy(SP_ADV_WL);
577 btm_cb.ble_ctr_cb.inq_var.scan_type = BTM_BLE_SCAN_MODE_PASS;
578
579 /* Process advertising packets only from devices in the white list */
580 if (btm_cb.cmn_ble_vsc_cb.extended_scan_support == 0) {
581 /* use passive scan by default */
582 if (!btsnd_hcic_ble_set_scan_params(BTM_BLE_SCAN_MODE_PASS,
583 scan_int,
584 scan_win,
585 p_cb->addr_mgnt_cb.own_addr_type,
586 SP_ADV_WL)) {
587 return FALSE;
588 }
589 } else {
590 if (!btm_ble_send_extended_scan_params(BTM_BLE_SCAN_MODE_PASS,
591 scan_int,
592 scan_win,
593 p_cb->addr_mgnt_cb.own_addr_type,
594 SP_ADV_WL)) {
595 return FALSE;
596 }
597 }
598
599 if (!btm_ble_topology_check(BTM_BLE_STATE_PASSIVE_SCAN)) {
600 BTM_TRACE_ERROR("peripheral device cannot initiate passive scan for a selective connection");
601 return FALSE;
602 } else if (background_connections_pending()) {
603 #if BLE_PRIVACY_SPT == TRUE
604 btm_ble_enable_resolving_list_for_platform(BTM_BLE_RL_SCAN);
605 #endif
606 if (!btsnd_hcic_ble_set_scan_enable(TRUE, TRUE)) { /* duplicate filtering enabled */
607 return FALSE;
608 }
609 /* mark up inquiry status flag */
610 p_cb->scan_activity |= BTM_LE_SELECT_CONN_ACTIVE;
611 p_cb->wl_state |= BTM_BLE_WL_SCAN;
612 }
613 } else {
614 BTM_TRACE_ERROR("scan active, can not start selective connection procedure");
615 return FALSE;
616 }
617 } else { /* disable selective connection mode */
618 p_cb->scan_activity &= ~BTM_LE_SELECT_CONN_ACTIVE;
619 p_cb->p_select_cback = NULL;
620 p_cb->wl_state &= ~BTM_BLE_WL_SCAN;
621
622 /* stop scanning */
623 if (!BTM_BLE_IS_SCAN_ACTIVE(p_cb->scan_activity)) {
624 btm_ble_stop_scan(); /* duplicate filtering enabled */
625 }
626 }
627 return TRUE;
628 }
629 /*******************************************************************************
630 **
631 ** Function btm_ble_initiate_select_conn
632 **
633 ** Description This function is to start/stop selective connection procedure.
634 **
635 ** Parameters start: TRUE to start; FALSE to stop.
636 ** p_select_cback: callback function to return application
637 ** selection.
638 **
639 ** Returns BOOLEAN: selective connection procedure is started.
640 **
641 *******************************************************************************/
btm_ble_initiate_select_conn(BD_ADDR bda)642 void btm_ble_initiate_select_conn(BD_ADDR bda)
643 {
644 BTM_TRACE_EVENT ("btm_ble_initiate_select_conn");
645
646 /* use direct connection procedure to initiate connection */
647 if (!L2CA_ConnectFixedChnl(L2CAP_ATT_CID, bda, BLE_ADDR_UNKNOWN_TYPE, FALSE)) {
648 BTM_TRACE_ERROR("btm_ble_initiate_select_conn failed");
649 }
650 }
651 /*******************************************************************************
652 **
653 ** Function btm_ble_suspend_bg_conn
654 **
655 ** Description This function is to suspend an active background connection
656 ** procedure.
657 **
658 ** Parameters none.
659 **
660 ** Returns none.
661 **
662 *******************************************************************************/
btm_ble_suspend_bg_conn(void)663 BOOLEAN btm_ble_suspend_bg_conn(void)
664 {
665 BTM_TRACE_EVENT ("%s\n", __func__);
666
667 if (btm_cb.ble_ctr_cb.bg_conn_type == BTM_BLE_CONN_AUTO) {
668 return btm_ble_start_auto_conn(FALSE);
669 } else if (btm_cb.ble_ctr_cb.bg_conn_type == BTM_BLE_CONN_SELECTIVE) {
670 return btm_ble_start_select_conn(FALSE, NULL);
671 }
672
673 return FALSE;
674 }
675 /*******************************************************************************
676 **
677 ** Function btm_suspend_wl_activity
678 **
679 ** Description This function is to suspend white list related activity
680 **
681 ** Returns none.
682 **
683 *******************************************************************************/
btm_suspend_wl_activity(tBTM_BLE_WL_STATE wl_state)684 static void btm_suspend_wl_activity(tBTM_BLE_WL_STATE wl_state)
685 {
686 if (wl_state & BTM_BLE_WL_INIT) {
687 btm_ble_start_auto_conn(FALSE);
688 }
689 if (wl_state & BTM_BLE_WL_SCAN) {
690 btm_ble_start_select_conn(FALSE, NULL);
691 }
692 if (wl_state & BTM_BLE_WL_ADV) {
693 btm_ble_stop_adv();
694 }
695
696 }
697 /*******************************************************************************
698 **
699 ** Function btm_resume_wl_activity
700 **
701 ** Description This function is to resume white list related activity
702 **
703 ** Returns none.
704 **
705 *******************************************************************************/
btm_resume_wl_activity(tBTM_BLE_WL_STATE wl_state)706 void btm_resume_wl_activity(tBTM_BLE_WL_STATE wl_state)
707 {
708 btm_ble_resume_bg_conn();
709 if (wl_state & BTM_BLE_WL_ADV) {
710 btm_ble_start_adv();
711 }
712
713 }
714
715 /*******************************************************************************
716 **
717 ** Function btm_wl_update_to_controller
718 **
719 ** Description This function is to update white list to controller
720 **
721 ** Returns none.
722 **
723 *******************************************************************************/
btm_wl_update_to_controller(void)724 static void btm_wl_update_to_controller(void)
725 {
726 /* whitelist will be added in the btm_ble_resume_bg_conn(), we do not
727 support background connection now, so we nedd to use btm_execute_wl_dev_operation
728 to add whitelist directly ,if we support background connection in the future,
729 please delete btm_execute_wl_dev_operation(). */
730 btm_execute_wl_dev_operation();
731
732 }
733 /*******************************************************************************
734 **
735 ** Function btm_ble_resume_bg_conn
736 **
737 ** Description This function is to resume a background auto connection
738 ** procedure.
739 **
740 ** Parameters none.
741 **
742 ** Returns none.
743 **
744 *******************************************************************************/
btm_ble_resume_bg_conn(void)745 BOOLEAN btm_ble_resume_bg_conn(void)
746 {
747 tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
748 BOOLEAN ret = FALSE;
749
750 if (p_cb->bg_conn_type != BTM_BLE_CONN_NONE) {
751 if (p_cb->bg_conn_type == BTM_BLE_CONN_AUTO) {
752 ret = btm_ble_start_auto_conn(TRUE);
753 }
754
755 if (p_cb->bg_conn_type == BTM_BLE_CONN_SELECTIVE) {
756 ret = btm_ble_start_select_conn(TRUE, btm_cb.ble_ctr_cb.p_select_cback);
757 }
758 }
759
760 return ret;
761 }
762 /*******************************************************************************
763 **
764 ** Function btm_ble_get_conn_st
765 **
766 ** Description This function get BLE connection state
767 **
768 ** Returns connection state
769 **
770 *******************************************************************************/
btm_ble_get_conn_st(void)771 tBTM_BLE_CONN_ST btm_ble_get_conn_st(void)
772 {
773 return btm_cb.ble_ctr_cb.conn_state;
774 }
775 /*******************************************************************************
776 **
777 ** Function btm_ble_set_conn_st
778 **
779 ** Description This function set BLE connection state
780 **
781 ** Returns None.
782 **
783 *******************************************************************************/
btm_ble_set_conn_st(tBTM_BLE_CONN_ST new_st)784 void btm_ble_set_conn_st(tBTM_BLE_CONN_ST new_st)
785 {
786 btm_cb.ble_ctr_cb.conn_state = new_st;
787
788 if (new_st == BLE_BG_CONN || new_st == BLE_DIR_CONN) {
789 btm_ble_set_topology_mask(BTM_BLE_STATE_INIT_BIT);
790 } else {
791 btm_ble_clear_topology_mask(BTM_BLE_STATE_INIT_BIT);
792 }
793 }
794
795 /*******************************************************************************
796 **
797 ** Function btm_ble_enqueue_direct_conn_req
798 **
799 ** Description This function enqueue the direct connection request
800 **
801 ** Returns None.
802 **
803 *******************************************************************************/
btm_ble_enqueue_direct_conn_req(void * p_param)804 void btm_ble_enqueue_direct_conn_req(void *p_param)
805 {
806 tBTM_BLE_CONN_REQ *p = (tBTM_BLE_CONN_REQ *)osi_malloc(sizeof(tBTM_BLE_CONN_REQ));
807
808 p->p_param = p_param;
809
810 fixed_queue_enqueue(btm_cb.ble_ctr_cb.conn_pending_q, p, FIXED_QUEUE_MAX_TIMEOUT);
811 }
812 /*******************************************************************************
813 **
814 ** Function btm_send_pending_direct_conn
815 **
816 ** Description This function send the pending direct connection request in queue
817 **
818 ** Returns TRUE if started, FALSE otherwise
819 **
820 *******************************************************************************/
btm_send_pending_direct_conn(void)821 BOOLEAN btm_send_pending_direct_conn(void)
822 {
823 tBTM_BLE_CONN_REQ *p_req;
824 BOOLEAN rt = FALSE;
825
826 p_req = (tBTM_BLE_CONN_REQ*)fixed_queue_dequeue(btm_cb.ble_ctr_cb.conn_pending_q, 0);
827 if (p_req != NULL) {
828 rt = l2cble_init_direct_conn((tL2C_LCB *)(p_req->p_param));
829
830 osi_free((void *)p_req);
831 }
832
833 return rt;
834 }
835
836 #endif
837
