summaryrefslogtreecommitdiff
path: root/net/bluetooth/hci_request.c
blob: 739f966e5d67f3843015a127a7dba08e2961a238 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
/*
   BlueZ - Bluetooth protocol stack for Linux

   Copyright (C) 2014 Intel Corporation

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License version 2 as
   published by the Free Software Foundation;

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
   OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
   IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
   CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
   WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

   ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
   COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
   SOFTWARE IS DISCLAIMED.
*/

#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>

#include "smp.h"
#include "hci_request.h"

void hci_req_init(struct hci_request *req, struct hci_dev *hdev)
{
	skb_queue_head_init(&req->cmd_q);
	req->hdev = hdev;
	req->err = 0;
}

static int req_run(struct hci_request *req, hci_req_complete_t complete,
		   hci_req_complete_skb_t complete_skb)
{
	struct hci_dev *hdev = req->hdev;
	struct sk_buff *skb;
	unsigned long flags;

	BT_DBG("length %u", skb_queue_len(&req->cmd_q));

	/* If an error occurred during request building, remove all HCI
	 * commands queued on the HCI request queue.
	 */
	if (req->err) {
		skb_queue_purge(&req->cmd_q);
		return req->err;
	}

	/* Do not allow empty requests */
	if (skb_queue_empty(&req->cmd_q))
		return -ENODATA;

	skb = skb_peek_tail(&req->cmd_q);
	bt_cb(skb)->req.complete = complete;
	bt_cb(skb)->req.complete_skb = complete_skb;

	spin_lock_irqsave(&hdev->cmd_q.lock, flags);
	skb_queue_splice_tail(&req->cmd_q, &hdev->cmd_q);
	spin_unlock_irqrestore(&hdev->cmd_q.lock, flags);

	queue_work(hdev->workqueue, &hdev->cmd_work);

	return 0;
}

int hci_req_run(struct hci_request *req, hci_req_complete_t complete)
{
	return req_run(req, complete, NULL);
}

int hci_req_run_skb(struct hci_request *req, hci_req_complete_skb_t complete)
{
	return req_run(req, NULL, complete);
}

struct sk_buff *hci_prepare_cmd(struct hci_dev *hdev, u16 opcode, u32 plen,
				const void *param)
{
	int len = HCI_COMMAND_HDR_SIZE + plen;
	struct hci_command_hdr *hdr;
	struct sk_buff *skb;

	skb = bt_skb_alloc(len, GFP_ATOMIC);
	if (!skb)
		return NULL;

	hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
	hdr->opcode = cpu_to_le16(opcode);
	hdr->plen   = plen;

	if (plen)
		memcpy(skb_put(skb, plen), param, plen);

	BT_DBG("skb len %d", skb->len);

	bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
	bt_cb(skb)->opcode = opcode;

	return skb;
}

/* Queue a command to an asynchronous HCI request */
void hci_req_add_ev(struct hci_request *req, u16 opcode, u32 plen,
		    const void *param, u8 event)
{
	struct hci_dev *hdev = req->hdev;
	struct sk_buff *skb;

	BT_DBG("%s opcode 0x%4.4x plen %d", hdev->name, opcode, plen);

	/* If an error occurred during request building, there is no point in
	 * queueing the HCI command. We can simply return.
	 */
	if (req->err)
		return;

	skb = hci_prepare_cmd(hdev, opcode, plen, param);
	if (!skb) {
		BT_ERR("%s no memory for command (opcode 0x%4.4x)",
		       hdev->name, opcode);
		req->err = -ENOMEM;
		return;
	}

	if (skb_queue_empty(&req->cmd_q))
		bt_cb(skb)->req.start = true;

	bt_cb(skb)->req.event = event;

	skb_queue_tail(&req->cmd_q, skb);
}

void hci_req_add(struct hci_request *req, u16 opcode, u32 plen,
		 const void *param)
{
	hci_req_add_ev(req, opcode, plen, param, 0);
}

void hci_req_add_le_scan_disable(struct hci_request *req)
{
	struct hci_cp_le_set_scan_enable cp;

	memset(&cp, 0, sizeof(cp));
	cp.enable = LE_SCAN_DISABLE;
	hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
}

static void add_to_white_list(struct hci_request *req,
			      struct hci_conn_params *params)
{
	struct hci_cp_le_add_to_white_list cp;

	cp.bdaddr_type = params->addr_type;
	bacpy(&cp.bdaddr, &params->addr);

	hci_req_add(req, HCI_OP_LE_ADD_TO_WHITE_LIST, sizeof(cp), &cp);
}

static u8 update_white_list(struct hci_request *req)
{
	struct hci_dev *hdev = req->hdev;
	struct hci_conn_params *params;
	struct bdaddr_list *b;
	uint8_t white_list_entries = 0;

	/* Go through the current white list programmed into the
	 * controller one by one and check if that address is still
	 * in the list of pending connections or list of devices to
	 * report. If not present in either list, then queue the
	 * command to remove it from the controller.
	 */
	list_for_each_entry(b, &hdev->le_white_list, list) {
		struct hci_cp_le_del_from_white_list cp;

		if (hci_pend_le_action_lookup(&hdev->pend_le_conns,
					      &b->bdaddr, b->bdaddr_type) ||
		    hci_pend_le_action_lookup(&hdev->pend_le_reports,
					      &b->bdaddr, b->bdaddr_type)) {
			white_list_entries++;
			continue;
		}

		cp.bdaddr_type = b->bdaddr_type;
		bacpy(&cp.bdaddr, &b->bdaddr);

		hci_req_add(req, HCI_OP_LE_DEL_FROM_WHITE_LIST,
			    sizeof(cp), &cp);
	}

	/* Since all no longer valid white list entries have been
	 * removed, walk through the list of pending connections
	 * and ensure that any new device gets programmed into
	 * the controller.
	 *
	 * If the list of the devices is larger than the list of
	 * available white list entries in the controller, then
	 * just abort and return filer policy value to not use the
	 * white list.
	 */
	list_for_each_entry(params, &hdev->pend_le_conns, action) {
		if (hci_bdaddr_list_lookup(&hdev->le_white_list,
					   &params->addr, params->addr_type))
			continue;

		if (white_list_entries >= hdev->le_white_list_size) {
			/* Select filter policy to accept all advertising */
			return 0x00;
		}

		if (hci_find_irk_by_addr(hdev, &params->addr,
					 params->addr_type)) {
			/* White list can not be used with RPAs */
			return 0x00;
		}

		white_list_entries++;
		add_to_white_list(req, params);
	}

	/* After adding all new pending connections, walk through
	 * the list of pending reports and also add these to the
	 * white list if there is still space.
	 */
	list_for_each_entry(params, &hdev->pend_le_reports, action) {
		if (hci_bdaddr_list_lookup(&hdev->le_white_list,
					   &params->addr, params->addr_type))
			continue;

		if (white_list_entries >= hdev->le_white_list_size) {
			/* Select filter policy to accept all advertising */
			return 0x00;
		}

		if (hci_find_irk_by_addr(hdev, &params->addr,
					 params->addr_type)) {
			/* White list can not be used with RPAs */
			return 0x00;
		}

		white_list_entries++;
		add_to_white_list(req, params);
	}

	/* Select filter policy to use white list */
	return 0x01;
}

void hci_req_add_le_passive_scan(struct hci_request *req)
{
	struct hci_cp_le_set_scan_param param_cp;
	struct hci_cp_le_set_scan_enable enable_cp;
	struct hci_dev *hdev = req->hdev;
	u8 own_addr_type;
	u8 filter_policy;

	/* Set require_privacy to false since no SCAN_REQ are send
	 * during passive scanning. Not using an non-resolvable address
	 * here is important so that peer devices using direct
	 * advertising with our address will be correctly reported
	 * by the controller.
	 */
	if (hci_update_random_address(req, false, &own_addr_type))
		return;

	/* Adding or removing entries from the white list must
	 * happen before enabling scanning. The controller does
	 * not allow white list modification while scanning.
	 */
	filter_policy = update_white_list(req);

	/* When the controller is using random resolvable addresses and
	 * with that having LE privacy enabled, then controllers with
	 * Extended Scanner Filter Policies support can now enable support
	 * for handling directed advertising.
	 *
	 * So instead of using filter polices 0x00 (no whitelist)
	 * and 0x01 (whitelist enabled) use the new filter policies
	 * 0x02 (no whitelist) and 0x03 (whitelist enabled).
	 */
	if (hci_dev_test_flag(hdev, HCI_PRIVACY) &&
	    (hdev->le_features[0] & HCI_LE_EXT_SCAN_POLICY))
		filter_policy |= 0x02;

	memset(&param_cp, 0, sizeof(param_cp));
	param_cp.type = LE_SCAN_PASSIVE;
	param_cp.interval = cpu_to_le16(hdev->le_scan_interval);
	param_cp.window = cpu_to_le16(hdev->le_scan_window);
	param_cp.own_address_type = own_addr_type;
	param_cp.filter_policy = filter_policy;
	hci_req_add(req, HCI_OP_LE_SET_SCAN_PARAM, sizeof(param_cp),
		    &param_cp);

	memset(&enable_cp, 0, sizeof(enable_cp));
	enable_cp.enable = LE_SCAN_ENABLE;
	enable_cp.filter_dup = LE_SCAN_FILTER_DUP_ENABLE;
	hci_req_add(req, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(enable_cp),
		    &enable_cp);
}

static void set_random_addr(struct hci_request *req, bdaddr_t *rpa)
{
	struct hci_dev *hdev = req->hdev;

	/* If we're advertising or initiating an LE connection we can't
	 * go ahead and change the random address at this time. This is
	 * because the eventual initiator address used for the
	 * subsequently created connection will be undefined (some
	 * controllers use the new address and others the one we had
	 * when the operation started).
	 *
	 * In this kind of scenario skip the update and let the random
	 * address be updated at the next cycle.
	 */
	if (hci_dev_test_flag(hdev, HCI_LE_ADV) ||
	    hci_lookup_le_connect(hdev)) {
		BT_DBG("Deferring random address update");
		hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
		return;
	}

	hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6, rpa);
}

int hci_update_random_address(struct hci_request *req, bool require_privacy,
			      u8 *own_addr_type)
{
	struct hci_dev *hdev = req->hdev;
	int err;

	/* If privacy is enabled use a resolvable private address. If
	 * current RPA has expired or there is something else than
	 * the current RPA in use, then generate a new one.
	 */
	if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
		int to;

		*own_addr_type = ADDR_LE_DEV_RANDOM;

		if (!hci_dev_test_and_clear_flag(hdev, HCI_RPA_EXPIRED) &&
		    !bacmp(&hdev->random_addr, &hdev->rpa))
			return 0;

		err = smp_generate_rpa(hdev, hdev->irk, &hdev->rpa);
		if (err < 0) {
			BT_ERR("%s failed to generate new RPA", hdev->name);
			return err;
		}

		set_random_addr(req, &hdev->rpa);

		to = msecs_to_jiffies(hdev->rpa_timeout * 1000);
		queue_delayed_work(hdev->workqueue, &hdev->rpa_expired, to);

		return 0;
	}

	/* In case of required privacy without resolvable private address,
	 * use an non-resolvable private address. This is useful for active
	 * scanning and non-connectable advertising.
	 */
	if (require_privacy) {
		bdaddr_t nrpa;

		while (true) {
			/* The non-resolvable private address is generated
			 * from random six bytes with the two most significant
			 * bits cleared.
			 */
			get_random_bytes(&nrpa, 6);
			nrpa.b[5] &= 0x3f;

			/* The non-resolvable private address shall not be
			 * equal to the public address.
			 */
			if (bacmp(&hdev->bdaddr, &nrpa))
				break;
		}

		*own_addr_type = ADDR_LE_DEV_RANDOM;
		set_random_addr(req, &nrpa);
		return 0;
	}

	/* If forcing static address is in use or there is no public
	 * address use the static address as random address (but skip
	 * the HCI command if the current random address is already the
	 * static one.
	 *
	 * In case BR/EDR has been disabled on a dual-mode controller
	 * and a static address has been configured, then use that
	 * address instead of the public BR/EDR address.
	 */
	if (hci_dev_test_flag(hdev, HCI_FORCE_STATIC_ADDR) ||
	    !bacmp(&hdev->bdaddr, BDADDR_ANY) ||
	    (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED) &&
	     bacmp(&hdev->static_addr, BDADDR_ANY))) {
		*own_addr_type = ADDR_LE_DEV_RANDOM;
		if (bacmp(&hdev->static_addr, &hdev->random_addr))
			hci_req_add(req, HCI_OP_LE_SET_RANDOM_ADDR, 6,
				    &hdev->static_addr);
		return 0;
	}

	/* Neither privacy nor static address is being used so use a
	 * public address.
	 */
	*own_addr_type = ADDR_LE_DEV_PUBLIC;

	return 0;
}

static bool disconnected_whitelist_entries(struct hci_dev *hdev)
{
	struct bdaddr_list *b;

	list_for_each_entry(b, &hdev->whitelist, list) {
		struct hci_conn *conn;

		conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &b->bdaddr);
		if (!conn)
			return true;

		if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
			return true;
	}

	return false;
}

void __hci_update_page_scan(struct hci_request *req)
{
	struct hci_dev *hdev = req->hdev;
	u8 scan;

	if (!hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
		return;

	if (!hdev_is_powered(hdev))
		return;

	if (mgmt_powering_down(hdev))
		return;

	if (hci_dev_test_flag(hdev, HCI_CONNECTABLE) ||
	    disconnected_whitelist_entries(hdev))
		scan = SCAN_PAGE;
	else
		scan = SCAN_DISABLED;

	if (test_bit(HCI_PSCAN, &hdev->flags) == !!(scan & SCAN_PAGE))
		return;

	if (hci_dev_test_flag(hdev, HCI_DISCOVERABLE))
		scan |= SCAN_INQUIRY;

	hci_req_add(req, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
}

void hci_update_page_scan(struct hci_dev *hdev)
{
	struct hci_request req;

	hci_req_init(&req, hdev);
	__hci_update_page_scan(&req);
	hci_req_run(&req, NULL);
}

/* This function controls the background scanning based on hdev->pend_le_conns
 * list. If there are pending LE connection we start the background scanning,
 * otherwise we stop it.
 *
 * This function requires the caller holds hdev->lock.
 */
void __hci_update_background_scan(struct hci_request *req)
{
	struct hci_dev *hdev = req->hdev;

	if (!test_bit(HCI_UP, &hdev->flags) ||
	    test_bit(HCI_INIT, &hdev->flags) ||
	    hci_dev_test_flag(hdev, HCI_SETUP) ||
	    hci_dev_test_flag(hdev, HCI_CONFIG) ||
	    hci_dev_test_flag(hdev, HCI_AUTO_OFF) ||
	    hci_dev_test_flag(hdev, HCI_UNREGISTER))
		return;

	/* No point in doing scanning if LE support hasn't been enabled */
	if (!hci_dev_test_flag(hdev, HCI_LE_ENABLED))
		return;

	/* If discovery is active don't interfere with it */
	if (hdev->discovery.state != DISCOVERY_STOPPED)
		return;

	/* Reset RSSI and UUID filters when starting background scanning
	 * since these filters are meant for service discovery only.
	 *
	 * The Start Discovery and Start Service Discovery operations
	 * ensure to set proper values for RSSI threshold and UUID
	 * filter list. So it is safe to just reset them here.
	 */
	hci_discovery_filter_clear(hdev);

	if (list_empty(&hdev->pend_le_conns) &&
	    list_empty(&hdev->pend_le_reports)) {
		/* If there is no pending LE connections or devices
		 * to be scanned for, we should stop the background
		 * scanning.
		 */

		/* If controller is not scanning we are done. */
		if (!hci_dev_test_flag(hdev, HCI_LE_SCAN))
			return;

		hci_req_add_le_scan_disable(req);

		BT_DBG("%s stopping background scanning", hdev->name);
	} else {
		/* If there is at least one pending LE connection, we should
		 * keep the background scan running.
		 */

		/* If controller is connecting, we should not start scanning
		 * since some controllers are not able to scan and connect at
		 * the same time.
		 */
		if (hci_lookup_le_connect(hdev))
			return;

		/* If controller is currently scanning, we stop it to ensure we
		 * don't miss any advertising (due to duplicates filter).
		 */
		if (hci_dev_test_flag(hdev, HCI_LE_SCAN))
			hci_req_add_le_scan_disable(req);

		hci_req_add_le_passive_scan(req);

		BT_DBG("%s starting background scanning", hdev->name);
	}
}

static void update_background_scan_complete(struct hci_dev *hdev, u8 status,
					    u16 opcode)
{
	if (status)
		BT_DBG("HCI request failed to update background scanning: "
		       "status 0x%2.2x", status);
}

void hci_update_background_scan(struct hci_dev *hdev)
{
	int err;
	struct hci_request req;

	hci_req_init(&req, hdev);

	__hci_update_background_scan(&req);

	err = hci_req_run(&req, update_background_scan_complete);
	if (err && err != -ENODATA)
		BT_ERR("Failed to run HCI request: err %d", err);
}

void __hci_abort_conn(struct hci_request *req, struct hci_conn *conn,
		      u8 reason)
{
	switch (conn->state) {
	case BT_CONNECTED:
	case BT_CONFIG:
		if (conn->type == AMP_LINK) {
			struct hci_cp_disconn_phy_link cp;

			cp.phy_handle = HCI_PHY_HANDLE(conn->handle);
			cp.reason = reason;
			hci_req_add(req, HCI_OP_DISCONN_PHY_LINK, sizeof(cp),
				    &cp);
		} else {
			struct hci_cp_disconnect dc;

			dc.handle = cpu_to_le16(conn->handle);
			dc.reason = reason;
			hci_req_add(req, HCI_OP_DISCONNECT, sizeof(dc), &dc);
		}

		conn->state = BT_DISCONN;

		break;
	case BT_CONNECT:
		if (conn->type == LE_LINK) {
			if (test_bit(HCI_CONN_SCANNING, &conn->flags))
				break;
			hci_req_add(req, HCI_OP_LE_CREATE_CONN_CANCEL,
				    0, NULL);
		} else if (conn->type == ACL_LINK) {
			if (req->hdev->hci_ver < BLUETOOTH_VER_1_2)
				break;
			hci_req_add(req, HCI_OP_CREATE_CONN_CANCEL,
				    6, &conn->dst);
		}
		break;
	case BT_CONNECT2:
		if (conn->type == ACL_LINK) {
			struct hci_cp_reject_conn_req rej;

			bacpy(&rej.bdaddr, &conn->dst);
			rej.reason = reason;

			hci_req_add(req, HCI_OP_REJECT_CONN_REQ,
				    sizeof(rej), &rej);
		} else if (conn->type == SCO_LINK || conn->type == ESCO_LINK) {
			struct hci_cp_reject_sync_conn_req rej;

			bacpy(&rej.bdaddr, &conn->dst);

			/* SCO rejection has its own limited set of
			 * allowed error values (0x0D-0x0F) which isn't
			 * compatible with most values passed to this
			 * function. To be safe hard-code one of the
			 * values that's suitable for SCO.
			 */
			rej.reason = HCI_ERROR_REMOTE_LOW_RESOURCES;

			hci_req_add(req, HCI_OP_REJECT_SYNC_CONN_REQ,
				    sizeof(rej), &rej);
		}
		break;
	default:
		conn->state = BT_CLOSED;
		break;
	}
}

static void abort_conn_complete(struct hci_dev *hdev, u8 status, u16 opcode)
{
	if (status)
		BT_DBG("Failed to abort connection: status 0x%2.2x", status);
}

int hci_abort_conn(struct hci_conn *conn, u8 reason)
{
	struct hci_request req;
	int err;

	hci_req_init(&req, conn->hdev);

	__hci_abort_conn(&req, conn, reason);

	err = hci_req_run(&req, abort_conn_complete);
	if (err && err != -ENODATA) {
		BT_ERR("Failed to run HCI request: err %d", err);
		return err;
	}

	return 0;
}