1 /*
2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (c) 2000-2001, 2010, Code Aurora Forum. All rights reserved.
4 Copyright 2023-2024 NXP
5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
23 SOFTWARE IS DISCLAIMED.
24 */
25
26 /* Bluetooth HCI event handling. */
27
28 #include <asm/unaligned.h>
29 #include <linux/crypto.h>
30 #include <crypto/algapi.h>
31
32 #include <net/bluetooth/bluetooth.h>
33 #include <net/bluetooth/hci_core.h>
34 #include <net/bluetooth/mgmt.h>
35
36 #include "hci_request.h"
37 #include "hci_debugfs.h"
38 #include "hci_codec.h"
39 #include "smp.h"
40 #include "msft.h"
41 #include "eir.h"
42
43 #define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
44 "\x00\x00\x00\x00\x00\x00\x00\x00"
45
46 #define secs_to_jiffies(_secs) msecs_to_jiffies((_secs) * 1000)
47
48 /* Handle HCI Event packets */
49
hci_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)50 static void *hci_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
51 u8 ev, size_t len)
52 {
53 void *data;
54
55 data = skb_pull_data(skb, len);
56 if (!data)
57 bt_dev_err(hdev, "Malformed Event: 0x%2.2x", ev);
58
59 return data;
60 }
61
hci_cc_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u16 op,size_t len)62 static void *hci_cc_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
63 u16 op, size_t len)
64 {
65 void *data;
66
67 data = skb_pull_data(skb, len);
68 if (!data)
69 bt_dev_err(hdev, "Malformed Command Complete: 0x%4.4x", op);
70
71 return data;
72 }
73
hci_le_ev_skb_pull(struct hci_dev * hdev,struct sk_buff * skb,u8 ev,size_t len)74 static void *hci_le_ev_skb_pull(struct hci_dev *hdev, struct sk_buff *skb,
75 u8 ev, size_t len)
76 {
77 void *data;
78
79 data = skb_pull_data(skb, len);
80 if (!data)
81 bt_dev_err(hdev, "Malformed LE Event: 0x%2.2x", ev);
82
83 return data;
84 }
85
hci_cc_inquiry_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)86 static u8 hci_cc_inquiry_cancel(struct hci_dev *hdev, void *data,
87 struct sk_buff *skb)
88 {
89 struct hci_ev_status *rp = data;
90
91 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
92
93 /* It is possible that we receive Inquiry Complete event right
94 * before we receive Inquiry Cancel Command Complete event, in
95 * which case the latter event should have status of Command
96 * Disallowed. This should not be treated as error, since
97 * we actually achieve what Inquiry Cancel wants to achieve,
98 * which is to end the last Inquiry session.
99 */
100 if (rp->status == HCI_ERROR_COMMAND_DISALLOWED && !test_bit(HCI_INQUIRY, &hdev->flags)) {
101 bt_dev_warn(hdev, "Ignoring error of Inquiry Cancel command");
102 rp->status = 0x00;
103 }
104
105 if (rp->status)
106 return rp->status;
107
108 clear_bit(HCI_INQUIRY, &hdev->flags);
109 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
110 wake_up_bit(&hdev->flags, HCI_INQUIRY);
111
112 hci_dev_lock(hdev);
113 /* Set discovery state to stopped if we're not doing LE active
114 * scanning.
115 */
116 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
117 hdev->le_scan_type != LE_SCAN_ACTIVE)
118 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
119 hci_dev_unlock(hdev);
120
121 return rp->status;
122 }
123
hci_cc_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)124 static u8 hci_cc_periodic_inq(struct hci_dev *hdev, void *data,
125 struct sk_buff *skb)
126 {
127 struct hci_ev_status *rp = data;
128
129 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
130
131 if (rp->status)
132 return rp->status;
133
134 hci_dev_set_flag(hdev, HCI_PERIODIC_INQ);
135
136 return rp->status;
137 }
138
hci_cc_exit_periodic_inq(struct hci_dev * hdev,void * data,struct sk_buff * skb)139 static u8 hci_cc_exit_periodic_inq(struct hci_dev *hdev, void *data,
140 struct sk_buff *skb)
141 {
142 struct hci_ev_status *rp = data;
143
144 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
145
146 if (rp->status)
147 return rp->status;
148
149 hci_dev_clear_flag(hdev, HCI_PERIODIC_INQ);
150
151 return rp->status;
152 }
153
hci_cc_remote_name_req_cancel(struct hci_dev * hdev,void * data,struct sk_buff * skb)154 static u8 hci_cc_remote_name_req_cancel(struct hci_dev *hdev, void *data,
155 struct sk_buff *skb)
156 {
157 struct hci_ev_status *rp = data;
158
159 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
160
161 return rp->status;
162 }
163
hci_cc_role_discovery(struct hci_dev * hdev,void * data,struct sk_buff * skb)164 static u8 hci_cc_role_discovery(struct hci_dev *hdev, void *data,
165 struct sk_buff *skb)
166 {
167 struct hci_rp_role_discovery *rp = data;
168 struct hci_conn *conn;
169
170 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
171
172 if (rp->status)
173 return rp->status;
174
175 hci_dev_lock(hdev);
176
177 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
178 if (conn)
179 conn->role = rp->role;
180
181 hci_dev_unlock(hdev);
182
183 return rp->status;
184 }
185
hci_cc_read_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)186 static u8 hci_cc_read_link_policy(struct hci_dev *hdev, void *data,
187 struct sk_buff *skb)
188 {
189 struct hci_rp_read_link_policy *rp = data;
190 struct hci_conn *conn;
191
192 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
193
194 if (rp->status)
195 return rp->status;
196
197 hci_dev_lock(hdev);
198
199 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
200 if (conn)
201 conn->link_policy = __le16_to_cpu(rp->policy);
202
203 hci_dev_unlock(hdev);
204
205 return rp->status;
206 }
207
hci_cc_write_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)208 static u8 hci_cc_write_link_policy(struct hci_dev *hdev, void *data,
209 struct sk_buff *skb)
210 {
211 struct hci_rp_write_link_policy *rp = data;
212 struct hci_conn *conn;
213 void *sent;
214
215 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
216
217 if (rp->status)
218 return rp->status;
219
220 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LINK_POLICY);
221 if (!sent)
222 return rp->status;
223
224 hci_dev_lock(hdev);
225
226 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
227 if (conn)
228 conn->link_policy = get_unaligned_le16(sent + 2);
229
230 hci_dev_unlock(hdev);
231
232 return rp->status;
233 }
234
hci_cc_read_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)235 static u8 hci_cc_read_def_link_policy(struct hci_dev *hdev, void *data,
236 struct sk_buff *skb)
237 {
238 struct hci_rp_read_def_link_policy *rp = data;
239
240 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
241
242 if (rp->status)
243 return rp->status;
244
245 hdev->link_policy = __le16_to_cpu(rp->policy);
246
247 return rp->status;
248 }
249
hci_cc_write_def_link_policy(struct hci_dev * hdev,void * data,struct sk_buff * skb)250 static u8 hci_cc_write_def_link_policy(struct hci_dev *hdev, void *data,
251 struct sk_buff *skb)
252 {
253 struct hci_ev_status *rp = data;
254 void *sent;
255
256 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
257
258 if (rp->status)
259 return rp->status;
260
261 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_LINK_POLICY);
262 if (!sent)
263 return rp->status;
264
265 hdev->link_policy = get_unaligned_le16(sent);
266
267 return rp->status;
268 }
269
hci_cc_reset(struct hci_dev * hdev,void * data,struct sk_buff * skb)270 static u8 hci_cc_reset(struct hci_dev *hdev, void *data, struct sk_buff *skb)
271 {
272 struct hci_ev_status *rp = data;
273
274 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
275
276 clear_bit(HCI_RESET, &hdev->flags);
277
278 if (rp->status)
279 return rp->status;
280
281 /* Reset all non-persistent flags */
282 hci_dev_clear_volatile_flags(hdev);
283
284 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
285
286 hdev->inq_tx_power = HCI_TX_POWER_INVALID;
287 hdev->adv_tx_power = HCI_TX_POWER_INVALID;
288
289 memset(hdev->adv_data, 0, sizeof(hdev->adv_data));
290 hdev->adv_data_len = 0;
291
292 memset(hdev->scan_rsp_data, 0, sizeof(hdev->scan_rsp_data));
293 hdev->scan_rsp_data_len = 0;
294
295 hdev->le_scan_type = LE_SCAN_PASSIVE;
296
297 hdev->ssp_debug_mode = 0;
298
299 hci_bdaddr_list_clear(&hdev->le_accept_list);
300 hci_bdaddr_list_clear(&hdev->le_resolv_list);
301
302 return rp->status;
303 }
304
hci_cc_read_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)305 static u8 hci_cc_read_stored_link_key(struct hci_dev *hdev, void *data,
306 struct sk_buff *skb)
307 {
308 struct hci_rp_read_stored_link_key *rp = data;
309 struct hci_cp_read_stored_link_key *sent;
310
311 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
312
313 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_STORED_LINK_KEY);
314 if (!sent)
315 return rp->status;
316
317 if (!rp->status && sent->read_all == 0x01) {
318 hdev->stored_max_keys = le16_to_cpu(rp->max_keys);
319 hdev->stored_num_keys = le16_to_cpu(rp->num_keys);
320 }
321
322 return rp->status;
323 }
324
hci_cc_delete_stored_link_key(struct hci_dev * hdev,void * data,struct sk_buff * skb)325 static u8 hci_cc_delete_stored_link_key(struct hci_dev *hdev, void *data,
326 struct sk_buff *skb)
327 {
328 struct hci_rp_delete_stored_link_key *rp = data;
329 u16 num_keys;
330
331 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
332
333 if (rp->status)
334 return rp->status;
335
336 num_keys = le16_to_cpu(rp->num_keys);
337
338 if (num_keys <= hdev->stored_num_keys)
339 hdev->stored_num_keys -= num_keys;
340 else
341 hdev->stored_num_keys = 0;
342
343 return rp->status;
344 }
345
hci_cc_write_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)346 static u8 hci_cc_write_local_name(struct hci_dev *hdev, void *data,
347 struct sk_buff *skb)
348 {
349 struct hci_ev_status *rp = data;
350 void *sent;
351
352 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
353
354 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LOCAL_NAME);
355 if (!sent)
356 return rp->status;
357
358 hci_dev_lock(hdev);
359
360 if (hci_dev_test_flag(hdev, HCI_MGMT))
361 mgmt_set_local_name_complete(hdev, sent, rp->status);
362 else if (!rp->status)
363 memcpy(hdev->dev_name, sent, HCI_MAX_NAME_LENGTH);
364
365 hci_dev_unlock(hdev);
366
367 return rp->status;
368 }
369
hci_cc_read_local_name(struct hci_dev * hdev,void * data,struct sk_buff * skb)370 static u8 hci_cc_read_local_name(struct hci_dev *hdev, void *data,
371 struct sk_buff *skb)
372 {
373 struct hci_rp_read_local_name *rp = data;
374
375 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
376
377 if (rp->status)
378 return rp->status;
379
380 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
381 hci_dev_test_flag(hdev, HCI_CONFIG))
382 memcpy(hdev->dev_name, rp->name, HCI_MAX_NAME_LENGTH);
383
384 return rp->status;
385 }
386
hci_cc_write_auth_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)387 static u8 hci_cc_write_auth_enable(struct hci_dev *hdev, void *data,
388 struct sk_buff *skb)
389 {
390 struct hci_ev_status *rp = data;
391 void *sent;
392
393 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
394
395 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_ENABLE);
396 if (!sent)
397 return rp->status;
398
399 hci_dev_lock(hdev);
400
401 if (!rp->status) {
402 __u8 param = *((__u8 *) sent);
403
404 if (param == AUTH_ENABLED)
405 set_bit(HCI_AUTH, &hdev->flags);
406 else
407 clear_bit(HCI_AUTH, &hdev->flags);
408 }
409
410 if (hci_dev_test_flag(hdev, HCI_MGMT))
411 mgmt_auth_enable_complete(hdev, rp->status);
412
413 hci_dev_unlock(hdev);
414
415 return rp->status;
416 }
417
hci_cc_write_encrypt_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)418 static u8 hci_cc_write_encrypt_mode(struct hci_dev *hdev, void *data,
419 struct sk_buff *skb)
420 {
421 struct hci_ev_status *rp = data;
422 __u8 param;
423 void *sent;
424
425 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
426
427 if (rp->status)
428 return rp->status;
429
430 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_ENCRYPT_MODE);
431 if (!sent)
432 return rp->status;
433
434 param = *((__u8 *) sent);
435
436 if (param)
437 set_bit(HCI_ENCRYPT, &hdev->flags);
438 else
439 clear_bit(HCI_ENCRYPT, &hdev->flags);
440
441 return rp->status;
442 }
443
hci_cc_write_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)444 static u8 hci_cc_write_scan_enable(struct hci_dev *hdev, void *data,
445 struct sk_buff *skb)
446 {
447 struct hci_ev_status *rp = data;
448 __u8 param;
449 void *sent;
450
451 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
452
453 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SCAN_ENABLE);
454 if (!sent)
455 return rp->status;
456
457 param = *((__u8 *) sent);
458
459 hci_dev_lock(hdev);
460
461 if (rp->status) {
462 hdev->discov_timeout = 0;
463 goto done;
464 }
465
466 if (param & SCAN_INQUIRY)
467 set_bit(HCI_ISCAN, &hdev->flags);
468 else
469 clear_bit(HCI_ISCAN, &hdev->flags);
470
471 if (param & SCAN_PAGE)
472 set_bit(HCI_PSCAN, &hdev->flags);
473 else
474 clear_bit(HCI_PSCAN, &hdev->flags);
475
476 done:
477 hci_dev_unlock(hdev);
478
479 return rp->status;
480 }
481
hci_cc_set_event_filter(struct hci_dev * hdev,void * data,struct sk_buff * skb)482 static u8 hci_cc_set_event_filter(struct hci_dev *hdev, void *data,
483 struct sk_buff *skb)
484 {
485 struct hci_ev_status *rp = data;
486 struct hci_cp_set_event_filter *cp;
487 void *sent;
488
489 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
490
491 if (rp->status)
492 return rp->status;
493
494 sent = hci_sent_cmd_data(hdev, HCI_OP_SET_EVENT_FLT);
495 if (!sent)
496 return rp->status;
497
498 cp = (struct hci_cp_set_event_filter *)sent;
499
500 if (cp->flt_type == HCI_FLT_CLEAR_ALL)
501 hci_dev_clear_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
502 else
503 hci_dev_set_flag(hdev, HCI_EVENT_FILTER_CONFIGURED);
504
505 return rp->status;
506 }
507
hci_cc_read_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)508 static u8 hci_cc_read_class_of_dev(struct hci_dev *hdev, void *data,
509 struct sk_buff *skb)
510 {
511 struct hci_rp_read_class_of_dev *rp = data;
512
513 if (WARN_ON(!hdev))
514 return HCI_ERROR_UNSPECIFIED;
515
516 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
517
518 if (rp->status)
519 return rp->status;
520
521 memcpy(hdev->dev_class, rp->dev_class, 3);
522
523 bt_dev_dbg(hdev, "class 0x%.2x%.2x%.2x", hdev->dev_class[2],
524 hdev->dev_class[1], hdev->dev_class[0]);
525
526 return rp->status;
527 }
528
hci_cc_write_class_of_dev(struct hci_dev * hdev,void * data,struct sk_buff * skb)529 static u8 hci_cc_write_class_of_dev(struct hci_dev *hdev, void *data,
530 struct sk_buff *skb)
531 {
532 struct hci_ev_status *rp = data;
533 void *sent;
534
535 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
536
537 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_CLASS_OF_DEV);
538 if (!sent)
539 return rp->status;
540
541 hci_dev_lock(hdev);
542
543 if (!rp->status)
544 memcpy(hdev->dev_class, sent, 3);
545
546 if (hci_dev_test_flag(hdev, HCI_MGMT))
547 mgmt_set_class_of_dev_complete(hdev, sent, rp->status);
548
549 hci_dev_unlock(hdev);
550
551 return rp->status;
552 }
553
hci_cc_read_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)554 static u8 hci_cc_read_voice_setting(struct hci_dev *hdev, void *data,
555 struct sk_buff *skb)
556 {
557 struct hci_rp_read_voice_setting *rp = data;
558 __u16 setting;
559
560 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
561
562 if (rp->status)
563 return rp->status;
564
565 setting = __le16_to_cpu(rp->voice_setting);
566
567 if (hdev->voice_setting == setting)
568 return rp->status;
569
570 hdev->voice_setting = setting;
571
572 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
573
574 if (hdev->notify)
575 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
576
577 return rp->status;
578 }
579
hci_cc_write_voice_setting(struct hci_dev * hdev,void * data,struct sk_buff * skb)580 static u8 hci_cc_write_voice_setting(struct hci_dev *hdev, void *data,
581 struct sk_buff *skb)
582 {
583 struct hci_ev_status *rp = data;
584 __u16 setting;
585 void *sent;
586
587 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
588
589 if (rp->status)
590 return rp->status;
591
592 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_VOICE_SETTING);
593 if (!sent)
594 return rp->status;
595
596 setting = get_unaligned_le16(sent);
597
598 if (hdev->voice_setting == setting)
599 return rp->status;
600
601 hdev->voice_setting = setting;
602
603 bt_dev_dbg(hdev, "voice setting 0x%4.4x", setting);
604
605 if (hdev->notify)
606 hdev->notify(hdev, HCI_NOTIFY_VOICE_SETTING);
607
608 return rp->status;
609 }
610
hci_cc_read_num_supported_iac(struct hci_dev * hdev,void * data,struct sk_buff * skb)611 static u8 hci_cc_read_num_supported_iac(struct hci_dev *hdev, void *data,
612 struct sk_buff *skb)
613 {
614 struct hci_rp_read_num_supported_iac *rp = data;
615
616 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
617
618 if (rp->status)
619 return rp->status;
620
621 hdev->num_iac = rp->num_iac;
622
623 bt_dev_dbg(hdev, "num iac %d", hdev->num_iac);
624
625 return rp->status;
626 }
627
hci_cc_write_ssp_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)628 static u8 hci_cc_write_ssp_mode(struct hci_dev *hdev, void *data,
629 struct sk_buff *skb)
630 {
631 struct hci_ev_status *rp = data;
632 struct hci_cp_write_ssp_mode *sent;
633
634 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
635
636 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_MODE);
637 if (!sent)
638 return rp->status;
639
640 hci_dev_lock(hdev);
641
642 if (!rp->status) {
643 if (sent->mode)
644 hdev->features[1][0] |= LMP_HOST_SSP;
645 else
646 hdev->features[1][0] &= ~LMP_HOST_SSP;
647 }
648
649 if (!rp->status) {
650 if (sent->mode)
651 hci_dev_set_flag(hdev, HCI_SSP_ENABLED);
652 else
653 hci_dev_clear_flag(hdev, HCI_SSP_ENABLED);
654 }
655
656 hci_dev_unlock(hdev);
657
658 return rp->status;
659 }
660
hci_cc_write_sc_support(struct hci_dev * hdev,void * data,struct sk_buff * skb)661 static u8 hci_cc_write_sc_support(struct hci_dev *hdev, void *data,
662 struct sk_buff *skb)
663 {
664 struct hci_ev_status *rp = data;
665 struct hci_cp_write_sc_support *sent;
666
667 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
668
669 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SC_SUPPORT);
670 if (!sent)
671 return rp->status;
672
673 hci_dev_lock(hdev);
674
675 if (!rp->status) {
676 if (sent->support)
677 hdev->features[1][0] |= LMP_HOST_SC;
678 else
679 hdev->features[1][0] &= ~LMP_HOST_SC;
680 }
681
682 if (!hci_dev_test_flag(hdev, HCI_MGMT) && !rp->status) {
683 if (sent->support)
684 hci_dev_set_flag(hdev, HCI_SC_ENABLED);
685 else
686 hci_dev_clear_flag(hdev, HCI_SC_ENABLED);
687 }
688
689 hci_dev_unlock(hdev);
690
691 return rp->status;
692 }
693
hci_cc_read_local_version(struct hci_dev * hdev,void * data,struct sk_buff * skb)694 static u8 hci_cc_read_local_version(struct hci_dev *hdev, void *data,
695 struct sk_buff *skb)
696 {
697 struct hci_rp_read_local_version *rp = data;
698
699 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
700
701 if (rp->status)
702 return rp->status;
703
704 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
705 hci_dev_test_flag(hdev, HCI_CONFIG)) {
706 hdev->hci_ver = rp->hci_ver;
707 hdev->hci_rev = __le16_to_cpu(rp->hci_rev);
708 hdev->lmp_ver = rp->lmp_ver;
709 hdev->manufacturer = __le16_to_cpu(rp->manufacturer);
710 hdev->lmp_subver = __le16_to_cpu(rp->lmp_subver);
711 }
712
713 return rp->status;
714 }
715
hci_cc_read_enc_key_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)716 static u8 hci_cc_read_enc_key_size(struct hci_dev *hdev, void *data,
717 struct sk_buff *skb)
718 {
719 struct hci_rp_read_enc_key_size *rp = data;
720 struct hci_conn *conn;
721 u16 handle;
722 u8 status = rp->status;
723
724 bt_dev_dbg(hdev, "status 0x%2.2x", status);
725
726 handle = le16_to_cpu(rp->handle);
727
728 hci_dev_lock(hdev);
729
730 conn = hci_conn_hash_lookup_handle(hdev, handle);
731 if (!conn) {
732 status = 0xFF;
733 goto done;
734 }
735
736 /* While unexpected, the read_enc_key_size command may fail. The most
737 * secure approach is to then assume the key size is 0 to force a
738 * disconnection.
739 */
740 if (status) {
741 bt_dev_err(hdev, "failed to read key size for handle %u",
742 handle);
743 conn->enc_key_size = 0;
744 } else {
745 conn->enc_key_size = rp->key_size;
746 status = 0;
747
748 if (conn->enc_key_size < hdev->min_enc_key_size) {
749 /* As slave role, the conn->state has been set to
750 * BT_CONNECTED and l2cap conn req might not be received
751 * yet, at this moment the l2cap layer almost does
752 * nothing with the non-zero status.
753 * So we also clear encrypt related bits, and then the
754 * handler of l2cap conn req will get the right secure
755 * state at a later time.
756 */
757 status = HCI_ERROR_AUTH_FAILURE;
758 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
759 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
760 }
761 }
762
763 hci_encrypt_cfm(conn, status);
764
765 done:
766 hci_dev_unlock(hdev);
767
768 return status;
769 }
770
hci_cc_read_local_commands(struct hci_dev * hdev,void * data,struct sk_buff * skb)771 static u8 hci_cc_read_local_commands(struct hci_dev *hdev, void *data,
772 struct sk_buff *skb)
773 {
774 struct hci_rp_read_local_commands *rp = data;
775
776 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
777
778 if (rp->status)
779 return rp->status;
780
781 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
782 hci_dev_test_flag(hdev, HCI_CONFIG))
783 memcpy(hdev->commands, rp->commands, sizeof(hdev->commands));
784
785 return rp->status;
786 }
787
hci_cc_read_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)788 static u8 hci_cc_read_auth_payload_timeout(struct hci_dev *hdev, void *data,
789 struct sk_buff *skb)
790 {
791 struct hci_rp_read_auth_payload_to *rp = data;
792 struct hci_conn *conn;
793
794 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
795
796 if (rp->status)
797 return rp->status;
798
799 hci_dev_lock(hdev);
800
801 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
802 if (conn)
803 conn->auth_payload_timeout = __le16_to_cpu(rp->timeout);
804
805 hci_dev_unlock(hdev);
806
807 return rp->status;
808 }
809
hci_cc_write_auth_payload_timeout(struct hci_dev * hdev,void * data,struct sk_buff * skb)810 static u8 hci_cc_write_auth_payload_timeout(struct hci_dev *hdev, void *data,
811 struct sk_buff *skb)
812 {
813 struct hci_rp_write_auth_payload_to *rp = data;
814 struct hci_conn *conn;
815 void *sent;
816
817 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
818
819 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO);
820 if (!sent)
821 return rp->status;
822
823 hci_dev_lock(hdev);
824
825 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
826 if (!conn) {
827 rp->status = 0xff;
828 goto unlock;
829 }
830
831 if (!rp->status)
832 conn->auth_payload_timeout = get_unaligned_le16(sent + 2);
833
834 unlock:
835 hci_dev_unlock(hdev);
836
837 return rp->status;
838 }
839
hci_cc_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)840 static u8 hci_cc_read_local_features(struct hci_dev *hdev, void *data,
841 struct sk_buff *skb)
842 {
843 struct hci_rp_read_local_features *rp = data;
844
845 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
846
847 if (rp->status)
848 return rp->status;
849
850 memcpy(hdev->features, rp->features, 8);
851
852 /* Adjust default settings according to features
853 * supported by device. */
854
855 if (hdev->features[0][0] & LMP_3SLOT)
856 hdev->pkt_type |= (HCI_DM3 | HCI_DH3);
857
858 if (hdev->features[0][0] & LMP_5SLOT)
859 hdev->pkt_type |= (HCI_DM5 | HCI_DH5);
860
861 if (hdev->features[0][1] & LMP_HV2) {
862 hdev->pkt_type |= (HCI_HV2);
863 hdev->esco_type |= (ESCO_HV2);
864 }
865
866 if (hdev->features[0][1] & LMP_HV3) {
867 hdev->pkt_type |= (HCI_HV3);
868 hdev->esco_type |= (ESCO_HV3);
869 }
870
871 if (lmp_esco_capable(hdev))
872 hdev->esco_type |= (ESCO_EV3);
873
874 if (hdev->features[0][4] & LMP_EV4)
875 hdev->esco_type |= (ESCO_EV4);
876
877 if (hdev->features[0][4] & LMP_EV5)
878 hdev->esco_type |= (ESCO_EV5);
879
880 if (hdev->features[0][5] & LMP_EDR_ESCO_2M)
881 hdev->esco_type |= (ESCO_2EV3);
882
883 if (hdev->features[0][5] & LMP_EDR_ESCO_3M)
884 hdev->esco_type |= (ESCO_3EV3);
885
886 if (hdev->features[0][5] & LMP_EDR_3S_ESCO)
887 hdev->esco_type |= (ESCO_2EV5 | ESCO_3EV5);
888
889 return rp->status;
890 }
891
hci_cc_read_local_ext_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)892 static u8 hci_cc_read_local_ext_features(struct hci_dev *hdev, void *data,
893 struct sk_buff *skb)
894 {
895 struct hci_rp_read_local_ext_features *rp = data;
896
897 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
898
899 if (rp->status)
900 return rp->status;
901
902 if (hdev->max_page < rp->max_page) {
903 if (test_bit(HCI_QUIRK_BROKEN_LOCAL_EXT_FEATURES_PAGE_2,
904 &hdev->quirks))
905 bt_dev_warn(hdev, "broken local ext features page 2");
906 else
907 hdev->max_page = rp->max_page;
908 }
909
910 if (rp->page < HCI_MAX_PAGES)
911 memcpy(hdev->features[rp->page], rp->features, 8);
912
913 return rp->status;
914 }
915
hci_cc_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)916 static u8 hci_cc_read_buffer_size(struct hci_dev *hdev, void *data,
917 struct sk_buff *skb)
918 {
919 struct hci_rp_read_buffer_size *rp = data;
920
921 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
922
923 if (rp->status)
924 return rp->status;
925
926 hdev->acl_mtu = __le16_to_cpu(rp->acl_mtu);
927 hdev->sco_mtu = rp->sco_mtu;
928 hdev->acl_pkts = __le16_to_cpu(rp->acl_max_pkt);
929 hdev->sco_pkts = __le16_to_cpu(rp->sco_max_pkt);
930
931 if (test_bit(HCI_QUIRK_FIXUP_BUFFER_SIZE, &hdev->quirks)) {
932 hdev->sco_mtu = 64;
933 hdev->sco_pkts = 8;
934 }
935
936 hdev->acl_cnt = hdev->acl_pkts;
937 hdev->sco_cnt = hdev->sco_pkts;
938
939 BT_DBG("%s acl mtu %d:%d sco mtu %d:%d", hdev->name, hdev->acl_mtu,
940 hdev->acl_pkts, hdev->sco_mtu, hdev->sco_pkts);
941
942 if (!hdev->acl_mtu || !hdev->acl_pkts)
943 return HCI_ERROR_INVALID_PARAMETERS;
944
945 return rp->status;
946 }
947
hci_cc_read_bd_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)948 static u8 hci_cc_read_bd_addr(struct hci_dev *hdev, void *data,
949 struct sk_buff *skb)
950 {
951 struct hci_rp_read_bd_addr *rp = data;
952
953 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
954
955 if (rp->status)
956 return rp->status;
957
958 if (test_bit(HCI_INIT, &hdev->flags))
959 bacpy(&hdev->bdaddr, &rp->bdaddr);
960
961 if (hci_dev_test_flag(hdev, HCI_SETUP))
962 bacpy(&hdev->setup_addr, &rp->bdaddr);
963
964 return rp->status;
965 }
966
hci_cc_read_local_pairing_opts(struct hci_dev * hdev,void * data,struct sk_buff * skb)967 static u8 hci_cc_read_local_pairing_opts(struct hci_dev *hdev, void *data,
968 struct sk_buff *skb)
969 {
970 struct hci_rp_read_local_pairing_opts *rp = data;
971
972 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
973
974 if (rp->status)
975 return rp->status;
976
977 if (hci_dev_test_flag(hdev, HCI_SETUP) ||
978 hci_dev_test_flag(hdev, HCI_CONFIG)) {
979 hdev->pairing_opts = rp->pairing_opts;
980 hdev->max_enc_key_size = rp->max_key_size;
981 }
982
983 return rp->status;
984 }
985
hci_cc_read_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)986 static u8 hci_cc_read_page_scan_activity(struct hci_dev *hdev, void *data,
987 struct sk_buff *skb)
988 {
989 struct hci_rp_read_page_scan_activity *rp = data;
990
991 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
992
993 if (rp->status)
994 return rp->status;
995
996 if (test_bit(HCI_INIT, &hdev->flags)) {
997 hdev->page_scan_interval = __le16_to_cpu(rp->interval);
998 hdev->page_scan_window = __le16_to_cpu(rp->window);
999 }
1000
1001 return rp->status;
1002 }
1003
hci_cc_write_page_scan_activity(struct hci_dev * hdev,void * data,struct sk_buff * skb)1004 static u8 hci_cc_write_page_scan_activity(struct hci_dev *hdev, void *data,
1005 struct sk_buff *skb)
1006 {
1007 struct hci_ev_status *rp = data;
1008 struct hci_cp_write_page_scan_activity *sent;
1009
1010 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1011
1012 if (rp->status)
1013 return rp->status;
1014
1015 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_ACTIVITY);
1016 if (!sent)
1017 return rp->status;
1018
1019 hdev->page_scan_interval = __le16_to_cpu(sent->interval);
1020 hdev->page_scan_window = __le16_to_cpu(sent->window);
1021
1022 return rp->status;
1023 }
1024
hci_cc_read_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1025 static u8 hci_cc_read_page_scan_type(struct hci_dev *hdev, void *data,
1026 struct sk_buff *skb)
1027 {
1028 struct hci_rp_read_page_scan_type *rp = data;
1029
1030 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1031
1032 if (rp->status)
1033 return rp->status;
1034
1035 if (test_bit(HCI_INIT, &hdev->flags))
1036 hdev->page_scan_type = rp->type;
1037
1038 return rp->status;
1039 }
1040
hci_cc_write_page_scan_type(struct hci_dev * hdev,void * data,struct sk_buff * skb)1041 static u8 hci_cc_write_page_scan_type(struct hci_dev *hdev, void *data,
1042 struct sk_buff *skb)
1043 {
1044 struct hci_ev_status *rp = data;
1045 u8 *type;
1046
1047 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1048
1049 if (rp->status)
1050 return rp->status;
1051
1052 type = hci_sent_cmd_data(hdev, HCI_OP_WRITE_PAGE_SCAN_TYPE);
1053 if (type)
1054 hdev->page_scan_type = *type;
1055
1056 return rp->status;
1057 }
1058
hci_cc_read_clock(struct hci_dev * hdev,void * data,struct sk_buff * skb)1059 static u8 hci_cc_read_clock(struct hci_dev *hdev, void *data,
1060 struct sk_buff *skb)
1061 {
1062 struct hci_rp_read_clock *rp = data;
1063 struct hci_cp_read_clock *cp;
1064 struct hci_conn *conn;
1065
1066 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1067
1068 if (rp->status)
1069 return rp->status;
1070
1071 hci_dev_lock(hdev);
1072
1073 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
1074 if (!cp)
1075 goto unlock;
1076
1077 if (cp->which == 0x00) {
1078 hdev->clock = le32_to_cpu(rp->clock);
1079 goto unlock;
1080 }
1081
1082 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
1083 if (conn) {
1084 conn->clock = le32_to_cpu(rp->clock);
1085 conn->clock_accuracy = le16_to_cpu(rp->accuracy);
1086 }
1087
1088 unlock:
1089 hci_dev_unlock(hdev);
1090 return rp->status;
1091 }
1092
hci_cc_read_inq_rsp_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1093 static u8 hci_cc_read_inq_rsp_tx_power(struct hci_dev *hdev, void *data,
1094 struct sk_buff *skb)
1095 {
1096 struct hci_rp_read_inq_rsp_tx_power *rp = data;
1097
1098 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1099
1100 if (rp->status)
1101 return rp->status;
1102
1103 hdev->inq_tx_power = rp->tx_power;
1104
1105 return rp->status;
1106 }
1107
hci_cc_read_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1108 static u8 hci_cc_read_def_err_data_reporting(struct hci_dev *hdev, void *data,
1109 struct sk_buff *skb)
1110 {
1111 struct hci_rp_read_def_err_data_reporting *rp = data;
1112
1113 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1114
1115 if (rp->status)
1116 return rp->status;
1117
1118 hdev->err_data_reporting = rp->err_data_reporting;
1119
1120 return rp->status;
1121 }
1122
hci_cc_write_def_err_data_reporting(struct hci_dev * hdev,void * data,struct sk_buff * skb)1123 static u8 hci_cc_write_def_err_data_reporting(struct hci_dev *hdev, void *data,
1124 struct sk_buff *skb)
1125 {
1126 struct hci_ev_status *rp = data;
1127 struct hci_cp_write_def_err_data_reporting *cp;
1128
1129 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1130
1131 if (rp->status)
1132 return rp->status;
1133
1134 cp = hci_sent_cmd_data(hdev, HCI_OP_WRITE_DEF_ERR_DATA_REPORTING);
1135 if (!cp)
1136 return rp->status;
1137
1138 hdev->err_data_reporting = cp->err_data_reporting;
1139
1140 return rp->status;
1141 }
1142
hci_cc_pin_code_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1143 static u8 hci_cc_pin_code_reply(struct hci_dev *hdev, void *data,
1144 struct sk_buff *skb)
1145 {
1146 struct hci_rp_pin_code_reply *rp = data;
1147 struct hci_cp_pin_code_reply *cp;
1148 struct hci_conn *conn;
1149
1150 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1151
1152 hci_dev_lock(hdev);
1153
1154 if (hci_dev_test_flag(hdev, HCI_MGMT))
1155 mgmt_pin_code_reply_complete(hdev, &rp->bdaddr, rp->status);
1156
1157 if (rp->status)
1158 goto unlock;
1159
1160 cp = hci_sent_cmd_data(hdev, HCI_OP_PIN_CODE_REPLY);
1161 if (!cp)
1162 goto unlock;
1163
1164 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
1165 if (conn)
1166 conn->pin_length = cp->pin_len;
1167
1168 unlock:
1169 hci_dev_unlock(hdev);
1170 return rp->status;
1171 }
1172
hci_cc_pin_code_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1173 static u8 hci_cc_pin_code_neg_reply(struct hci_dev *hdev, void *data,
1174 struct sk_buff *skb)
1175 {
1176 struct hci_rp_pin_code_neg_reply *rp = data;
1177
1178 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1179
1180 hci_dev_lock(hdev);
1181
1182 if (hci_dev_test_flag(hdev, HCI_MGMT))
1183 mgmt_pin_code_neg_reply_complete(hdev, &rp->bdaddr,
1184 rp->status);
1185
1186 hci_dev_unlock(hdev);
1187
1188 return rp->status;
1189 }
1190
hci_cc_le_read_buffer_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1191 static u8 hci_cc_le_read_buffer_size(struct hci_dev *hdev, void *data,
1192 struct sk_buff *skb)
1193 {
1194 struct hci_rp_le_read_buffer_size *rp = data;
1195
1196 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1197
1198 if (rp->status)
1199 return rp->status;
1200
1201 hdev->le_mtu = __le16_to_cpu(rp->le_mtu);
1202 hdev->le_pkts = rp->le_max_pkt;
1203
1204 hdev->le_cnt = hdev->le_pkts;
1205
1206 BT_DBG("%s le mtu %d:%d", hdev->name, hdev->le_mtu, hdev->le_pkts);
1207
1208 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
1209 return HCI_ERROR_INVALID_PARAMETERS;
1210
1211 return rp->status;
1212 }
1213
hci_cc_le_read_local_features(struct hci_dev * hdev,void * data,struct sk_buff * skb)1214 static u8 hci_cc_le_read_local_features(struct hci_dev *hdev, void *data,
1215 struct sk_buff *skb)
1216 {
1217 struct hci_rp_le_read_local_features *rp = data;
1218
1219 BT_DBG("%s status 0x%2.2x", hdev->name, rp->status);
1220
1221 if (rp->status)
1222 return rp->status;
1223
1224 memcpy(hdev->le_features, rp->features, 8);
1225
1226 return rp->status;
1227 }
1228
hci_cc_le_read_adv_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1229 static u8 hci_cc_le_read_adv_tx_power(struct hci_dev *hdev, void *data,
1230 struct sk_buff *skb)
1231 {
1232 struct hci_rp_le_read_adv_tx_power *rp = data;
1233
1234 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1235
1236 if (rp->status)
1237 return rp->status;
1238
1239 hdev->adv_tx_power = rp->tx_power;
1240
1241 return rp->status;
1242 }
1243
hci_cc_user_confirm_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1244 static u8 hci_cc_user_confirm_reply(struct hci_dev *hdev, void *data,
1245 struct sk_buff *skb)
1246 {
1247 struct hci_rp_user_confirm_reply *rp = data;
1248
1249 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1250
1251 hci_dev_lock(hdev);
1252
1253 if (hci_dev_test_flag(hdev, HCI_MGMT))
1254 mgmt_user_confirm_reply_complete(hdev, &rp->bdaddr, ACL_LINK, 0,
1255 rp->status);
1256
1257 hci_dev_unlock(hdev);
1258
1259 return rp->status;
1260 }
1261
hci_cc_user_confirm_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1262 static u8 hci_cc_user_confirm_neg_reply(struct hci_dev *hdev, void *data,
1263 struct sk_buff *skb)
1264 {
1265 struct hci_rp_user_confirm_reply *rp = data;
1266
1267 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1268
1269 hci_dev_lock(hdev);
1270
1271 if (hci_dev_test_flag(hdev, HCI_MGMT))
1272 mgmt_user_confirm_neg_reply_complete(hdev, &rp->bdaddr,
1273 ACL_LINK, 0, rp->status);
1274
1275 hci_dev_unlock(hdev);
1276
1277 return rp->status;
1278 }
1279
hci_cc_user_passkey_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1280 static u8 hci_cc_user_passkey_reply(struct hci_dev *hdev, void *data,
1281 struct sk_buff *skb)
1282 {
1283 struct hci_rp_user_confirm_reply *rp = data;
1284
1285 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1286
1287 hci_dev_lock(hdev);
1288
1289 if (hci_dev_test_flag(hdev, HCI_MGMT))
1290 mgmt_user_passkey_reply_complete(hdev, &rp->bdaddr, ACL_LINK,
1291 0, rp->status);
1292
1293 hci_dev_unlock(hdev);
1294
1295 return rp->status;
1296 }
1297
hci_cc_user_passkey_neg_reply(struct hci_dev * hdev,void * data,struct sk_buff * skb)1298 static u8 hci_cc_user_passkey_neg_reply(struct hci_dev *hdev, void *data,
1299 struct sk_buff *skb)
1300 {
1301 struct hci_rp_user_confirm_reply *rp = data;
1302
1303 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1304
1305 hci_dev_lock(hdev);
1306
1307 if (hci_dev_test_flag(hdev, HCI_MGMT))
1308 mgmt_user_passkey_neg_reply_complete(hdev, &rp->bdaddr,
1309 ACL_LINK, 0, rp->status);
1310
1311 hci_dev_unlock(hdev);
1312
1313 return rp->status;
1314 }
1315
hci_cc_read_local_oob_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1316 static u8 hci_cc_read_local_oob_data(struct hci_dev *hdev, void *data,
1317 struct sk_buff *skb)
1318 {
1319 struct hci_rp_read_local_oob_data *rp = data;
1320
1321 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1322
1323 return rp->status;
1324 }
1325
hci_cc_read_local_oob_ext_data(struct hci_dev * hdev,void * data,struct sk_buff * skb)1326 static u8 hci_cc_read_local_oob_ext_data(struct hci_dev *hdev, void *data,
1327 struct sk_buff *skb)
1328 {
1329 struct hci_rp_read_local_oob_ext_data *rp = data;
1330
1331 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1332
1333 return rp->status;
1334 }
1335
hci_cc_le_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1336 static u8 hci_cc_le_set_random_addr(struct hci_dev *hdev, void *data,
1337 struct sk_buff *skb)
1338 {
1339 struct hci_ev_status *rp = data;
1340 bdaddr_t *sent;
1341
1342 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1343
1344 if (rp->status)
1345 return rp->status;
1346
1347 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_RANDOM_ADDR);
1348 if (!sent)
1349 return rp->status;
1350
1351 hci_dev_lock(hdev);
1352
1353 bacpy(&hdev->random_addr, sent);
1354
1355 if (!bacmp(&hdev->rpa, sent)) {
1356 hci_dev_clear_flag(hdev, HCI_RPA_EXPIRED);
1357 queue_delayed_work(hdev->workqueue, &hdev->rpa_expired,
1358 secs_to_jiffies(hdev->rpa_timeout));
1359 }
1360
1361 hci_dev_unlock(hdev);
1362
1363 return rp->status;
1364 }
1365
hci_cc_le_set_default_phy(struct hci_dev * hdev,void * data,struct sk_buff * skb)1366 static u8 hci_cc_le_set_default_phy(struct hci_dev *hdev, void *data,
1367 struct sk_buff *skb)
1368 {
1369 struct hci_ev_status *rp = data;
1370 struct hci_cp_le_set_default_phy *cp;
1371
1372 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1373
1374 if (rp->status)
1375 return rp->status;
1376
1377 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_DEFAULT_PHY);
1378 if (!cp)
1379 return rp->status;
1380
1381 hci_dev_lock(hdev);
1382
1383 hdev->le_tx_def_phys = cp->tx_phys;
1384 hdev->le_rx_def_phys = cp->rx_phys;
1385
1386 hci_dev_unlock(hdev);
1387
1388 return rp->status;
1389 }
1390
hci_cc_le_set_adv_set_random_addr(struct hci_dev * hdev,void * data,struct sk_buff * skb)1391 static u8 hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, void *data,
1392 struct sk_buff *skb)
1393 {
1394 struct hci_ev_status *rp = data;
1395 struct hci_cp_le_set_adv_set_rand_addr *cp;
1396 struct adv_info *adv;
1397
1398 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1399
1400 if (rp->status)
1401 return rp->status;
1402
1403 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_SET_RAND_ADDR);
1404 /* Update only in case the adv instance since handle 0x00 shall be using
1405 * HCI_OP_LE_SET_RANDOM_ADDR since that allows both extended and
1406 * non-extended adverting.
1407 */
1408 if (!cp || !cp->handle)
1409 return rp->status;
1410
1411 hci_dev_lock(hdev);
1412
1413 adv = hci_find_adv_instance(hdev, cp->handle);
1414 if (adv) {
1415 bacpy(&adv->random_addr, &cp->bdaddr);
1416 if (!bacmp(&hdev->rpa, &cp->bdaddr)) {
1417 adv->rpa_expired = false;
1418 queue_delayed_work(hdev->workqueue,
1419 &adv->rpa_expired_cb,
1420 secs_to_jiffies(hdev->rpa_timeout));
1421 }
1422 }
1423
1424 hci_dev_unlock(hdev);
1425
1426 return rp->status;
1427 }
1428
hci_cc_le_remove_adv_set(struct hci_dev * hdev,void * data,struct sk_buff * skb)1429 static u8 hci_cc_le_remove_adv_set(struct hci_dev *hdev, void *data,
1430 struct sk_buff *skb)
1431 {
1432 struct hci_ev_status *rp = data;
1433 u8 *instance;
1434 int err;
1435
1436 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1437
1438 if (rp->status)
1439 return rp->status;
1440
1441 instance = hci_sent_cmd_data(hdev, HCI_OP_LE_REMOVE_ADV_SET);
1442 if (!instance)
1443 return rp->status;
1444
1445 hci_dev_lock(hdev);
1446
1447 err = hci_remove_adv_instance(hdev, *instance);
1448 if (!err)
1449 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd), hdev,
1450 *instance);
1451
1452 hci_dev_unlock(hdev);
1453
1454 return rp->status;
1455 }
1456
hci_cc_le_clear_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1457 static u8 hci_cc_le_clear_adv_sets(struct hci_dev *hdev, void *data,
1458 struct sk_buff *skb)
1459 {
1460 struct hci_ev_status *rp = data;
1461 struct adv_info *adv, *n;
1462 int err;
1463
1464 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1465
1466 if (rp->status)
1467 return rp->status;
1468
1469 if (!hci_sent_cmd_data(hdev, HCI_OP_LE_CLEAR_ADV_SETS))
1470 return rp->status;
1471
1472 hci_dev_lock(hdev);
1473
1474 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
1475 u8 instance = adv->instance;
1476
1477 err = hci_remove_adv_instance(hdev, instance);
1478 if (!err)
1479 mgmt_advertising_removed(hci_skb_sk(hdev->sent_cmd),
1480 hdev, instance);
1481 }
1482
1483 hci_dev_unlock(hdev);
1484
1485 return rp->status;
1486 }
1487
hci_cc_le_read_transmit_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)1488 static u8 hci_cc_le_read_transmit_power(struct hci_dev *hdev, void *data,
1489 struct sk_buff *skb)
1490 {
1491 struct hci_rp_le_read_transmit_power *rp = data;
1492
1493 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1494
1495 if (rp->status)
1496 return rp->status;
1497
1498 hdev->min_le_tx_power = rp->min_le_tx_power;
1499 hdev->max_le_tx_power = rp->max_le_tx_power;
1500
1501 return rp->status;
1502 }
1503
hci_cc_le_set_privacy_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)1504 static u8 hci_cc_le_set_privacy_mode(struct hci_dev *hdev, void *data,
1505 struct sk_buff *skb)
1506 {
1507 struct hci_ev_status *rp = data;
1508 struct hci_cp_le_set_privacy_mode *cp;
1509 struct hci_conn_params *params;
1510
1511 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1512
1513 if (rp->status)
1514 return rp->status;
1515
1516 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PRIVACY_MODE);
1517 if (!cp)
1518 return rp->status;
1519
1520 hci_dev_lock(hdev);
1521
1522 params = hci_conn_params_lookup(hdev, &cp->bdaddr, cp->bdaddr_type);
1523 if (params)
1524 WRITE_ONCE(params->privacy_mode, cp->mode);
1525
1526 hci_dev_unlock(hdev);
1527
1528 return rp->status;
1529 }
1530
hci_cc_le_set_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1531 static u8 hci_cc_le_set_adv_enable(struct hci_dev *hdev, void *data,
1532 struct sk_buff *skb)
1533 {
1534 struct hci_ev_status *rp = data;
1535 __u8 *sent;
1536
1537 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1538
1539 if (rp->status)
1540 return rp->status;
1541
1542 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_ENABLE);
1543 if (!sent)
1544 return rp->status;
1545
1546 hci_dev_lock(hdev);
1547
1548 /* If we're doing connection initiation as peripheral. Set a
1549 * timeout in case something goes wrong.
1550 */
1551 if (*sent) {
1552 struct hci_conn *conn;
1553
1554 hci_dev_set_flag(hdev, HCI_LE_ADV);
1555
1556 conn = hci_lookup_le_connect(hdev);
1557 if (conn)
1558 queue_delayed_work(hdev->workqueue,
1559 &conn->le_conn_timeout,
1560 conn->conn_timeout);
1561 } else {
1562 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1563 }
1564
1565 hci_dev_unlock(hdev);
1566
1567 return rp->status;
1568 }
1569
hci_cc_le_set_ext_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1570 static u8 hci_cc_le_set_ext_adv_enable(struct hci_dev *hdev, void *data,
1571 struct sk_buff *skb)
1572 {
1573 struct hci_cp_le_set_ext_adv_enable *cp;
1574 struct hci_cp_ext_adv_set *set;
1575 struct adv_info *adv = NULL, *n;
1576 struct hci_ev_status *rp = data;
1577
1578 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1579
1580 if (rp->status)
1581 return rp->status;
1582
1583 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_ENABLE);
1584 if (!cp)
1585 return rp->status;
1586
1587 set = (void *)cp->data;
1588
1589 hci_dev_lock(hdev);
1590
1591 if (cp->num_of_sets)
1592 adv = hci_find_adv_instance(hdev, set->handle);
1593
1594 if (cp->enable) {
1595 struct hci_conn *conn;
1596
1597 hci_dev_set_flag(hdev, HCI_LE_ADV);
1598
1599 if (adv && !adv->periodic)
1600 adv->enabled = true;
1601
1602 conn = hci_lookup_le_connect(hdev);
1603 if (conn)
1604 queue_delayed_work(hdev->workqueue,
1605 &conn->le_conn_timeout,
1606 conn->conn_timeout);
1607 } else {
1608 if (cp->num_of_sets) {
1609 if (adv)
1610 adv->enabled = false;
1611
1612 /* If just one instance was disabled check if there are
1613 * any other instance enabled before clearing HCI_LE_ADV
1614 */
1615 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1616 list) {
1617 if (adv->enabled)
1618 goto unlock;
1619 }
1620 } else {
1621 /* All instances shall be considered disabled */
1622 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
1623 list)
1624 adv->enabled = false;
1625 }
1626
1627 hci_dev_clear_flag(hdev, HCI_LE_ADV);
1628 }
1629
1630 unlock:
1631 hci_dev_unlock(hdev);
1632 return rp->status;
1633 }
1634
hci_cc_le_set_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1635 static u8 hci_cc_le_set_scan_param(struct hci_dev *hdev, void *data,
1636 struct sk_buff *skb)
1637 {
1638 struct hci_cp_le_set_scan_param *cp;
1639 struct hci_ev_status *rp = data;
1640
1641 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1642
1643 if (rp->status)
1644 return rp->status;
1645
1646 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_PARAM);
1647 if (!cp)
1648 return rp->status;
1649
1650 hci_dev_lock(hdev);
1651
1652 hdev->le_scan_type = cp->type;
1653
1654 hci_dev_unlock(hdev);
1655
1656 return rp->status;
1657 }
1658
hci_cc_le_set_ext_scan_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)1659 static u8 hci_cc_le_set_ext_scan_param(struct hci_dev *hdev, void *data,
1660 struct sk_buff *skb)
1661 {
1662 struct hci_cp_le_set_ext_scan_params *cp;
1663 struct hci_ev_status *rp = data;
1664 struct hci_cp_le_scan_phy_params *phy_param;
1665
1666 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1667
1668 if (rp->status)
1669 return rp->status;
1670
1671 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_PARAMS);
1672 if (!cp)
1673 return rp->status;
1674
1675 phy_param = (void *)cp->data;
1676
1677 hci_dev_lock(hdev);
1678
1679 hdev->le_scan_type = phy_param->type;
1680
1681 hci_dev_unlock(hdev);
1682
1683 return rp->status;
1684 }
1685
has_pending_adv_report(struct hci_dev * hdev)1686 static bool has_pending_adv_report(struct hci_dev *hdev)
1687 {
1688 struct discovery_state *d = &hdev->discovery;
1689
1690 return bacmp(&d->last_adv_addr, BDADDR_ANY);
1691 }
1692
clear_pending_adv_report(struct hci_dev * hdev)1693 static void clear_pending_adv_report(struct hci_dev *hdev)
1694 {
1695 struct discovery_state *d = &hdev->discovery;
1696
1697 bacpy(&d->last_adv_addr, BDADDR_ANY);
1698 d->last_adv_data_len = 0;
1699 }
1700
store_pending_adv_report(struct hci_dev * hdev,bdaddr_t * bdaddr,u8 bdaddr_type,s8 rssi,u32 flags,u8 * data,u8 len)1701 static void store_pending_adv_report(struct hci_dev *hdev, bdaddr_t *bdaddr,
1702 u8 bdaddr_type, s8 rssi, u32 flags,
1703 u8 *data, u8 len)
1704 {
1705 struct discovery_state *d = &hdev->discovery;
1706
1707 if (len > max_adv_len(hdev))
1708 return;
1709
1710 bacpy(&d->last_adv_addr, bdaddr);
1711 d->last_adv_addr_type = bdaddr_type;
1712 d->last_adv_rssi = rssi;
1713 d->last_adv_flags = flags;
1714 memcpy(d->last_adv_data, data, len);
1715 d->last_adv_data_len = len;
1716 }
1717
le_set_scan_enable_complete(struct hci_dev * hdev,u8 enable)1718 static void le_set_scan_enable_complete(struct hci_dev *hdev, u8 enable)
1719 {
1720 hci_dev_lock(hdev);
1721
1722 switch (enable) {
1723 case LE_SCAN_ENABLE:
1724 hci_dev_set_flag(hdev, HCI_LE_SCAN);
1725 if (hdev->le_scan_type == LE_SCAN_ACTIVE)
1726 clear_pending_adv_report(hdev);
1727 hci_discovery_set_state(hdev, DISCOVERY_FINDING);
1728 break;
1729
1730 case LE_SCAN_DISABLE:
1731 /* We do this here instead of when setting DISCOVERY_STOPPED
1732 * since the latter would potentially require waiting for
1733 * inquiry to stop too.
1734 */
1735 if (has_pending_adv_report(hdev)) {
1736 struct discovery_state *d = &hdev->discovery;
1737
1738 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
1739 d->last_adv_addr_type, NULL,
1740 d->last_adv_rssi, d->last_adv_flags,
1741 d->last_adv_data,
1742 d->last_adv_data_len, NULL, 0, 0);
1743 }
1744
1745 /* Cancel this timer so that we don't try to disable scanning
1746 * when it's already disabled.
1747 */
1748 cancel_delayed_work(&hdev->le_scan_disable);
1749
1750 hci_dev_clear_flag(hdev, HCI_LE_SCAN);
1751
1752 /* The HCI_LE_SCAN_INTERRUPTED flag indicates that we
1753 * interrupted scanning due to a connect request. Mark
1754 * therefore discovery as stopped.
1755 */
1756 if (hci_dev_test_and_clear_flag(hdev, HCI_LE_SCAN_INTERRUPTED))
1757 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
1758 else if (!hci_dev_test_flag(hdev, HCI_LE_ADV) &&
1759 hdev->discovery.state == DISCOVERY_FINDING)
1760 queue_work(hdev->workqueue, &hdev->reenable_adv_work);
1761
1762 break;
1763
1764 default:
1765 bt_dev_err(hdev, "use of reserved LE_Scan_Enable param %d",
1766 enable);
1767 break;
1768 }
1769
1770 hci_dev_unlock(hdev);
1771 }
1772
hci_cc_le_set_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1773 static u8 hci_cc_le_set_scan_enable(struct hci_dev *hdev, void *data,
1774 struct sk_buff *skb)
1775 {
1776 struct hci_cp_le_set_scan_enable *cp;
1777 struct hci_ev_status *rp = data;
1778
1779 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1780
1781 if (rp->status)
1782 return rp->status;
1783
1784 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_SCAN_ENABLE);
1785 if (!cp)
1786 return rp->status;
1787
1788 le_set_scan_enable_complete(hdev, cp->enable);
1789
1790 return rp->status;
1791 }
1792
hci_cc_le_set_ext_scan_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)1793 static u8 hci_cc_le_set_ext_scan_enable(struct hci_dev *hdev, void *data,
1794 struct sk_buff *skb)
1795 {
1796 struct hci_cp_le_set_ext_scan_enable *cp;
1797 struct hci_ev_status *rp = data;
1798
1799 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1800
1801 if (rp->status)
1802 return rp->status;
1803
1804 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_SCAN_ENABLE);
1805 if (!cp)
1806 return rp->status;
1807
1808 le_set_scan_enable_complete(hdev, cp->enable);
1809
1810 return rp->status;
1811 }
1812
hci_cc_le_read_num_adv_sets(struct hci_dev * hdev,void * data,struct sk_buff * skb)1813 static u8 hci_cc_le_read_num_adv_sets(struct hci_dev *hdev, void *data,
1814 struct sk_buff *skb)
1815 {
1816 struct hci_rp_le_read_num_supported_adv_sets *rp = data;
1817
1818 bt_dev_dbg(hdev, "status 0x%2.2x No of Adv sets %u", rp->status,
1819 rp->num_of_sets);
1820
1821 if (rp->status)
1822 return rp->status;
1823
1824 hdev->le_num_of_adv_sets = rp->num_of_sets;
1825
1826 return rp->status;
1827 }
1828
hci_cc_le_read_accept_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)1829 static u8 hci_cc_le_read_accept_list_size(struct hci_dev *hdev, void *data,
1830 struct sk_buff *skb)
1831 {
1832 struct hci_rp_le_read_accept_list_size *rp = data;
1833
1834 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
1835
1836 if (rp->status)
1837 return rp->status;
1838
1839 hdev->le_accept_list_size = rp->size;
1840
1841 return rp->status;
1842 }
1843
hci_cc_le_clear_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1844 static u8 hci_cc_le_clear_accept_list(struct hci_dev *hdev, void *data,
1845 struct sk_buff *skb)
1846 {
1847 struct hci_ev_status *rp = data;
1848
1849 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1850
1851 if (rp->status)
1852 return rp->status;
1853
1854 hci_dev_lock(hdev);
1855 hci_bdaddr_list_clear(&hdev->le_accept_list);
1856 hci_dev_unlock(hdev);
1857
1858 return rp->status;
1859 }
1860
hci_cc_le_add_to_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1861 static u8 hci_cc_le_add_to_accept_list(struct hci_dev *hdev, void *data,
1862 struct sk_buff *skb)
1863 {
1864 struct hci_cp_le_add_to_accept_list *sent;
1865 struct hci_ev_status *rp = data;
1866
1867 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1868
1869 if (rp->status)
1870 return rp->status;
1871
1872 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_ACCEPT_LIST);
1873 if (!sent)
1874 return rp->status;
1875
1876 hci_dev_lock(hdev);
1877 hci_bdaddr_list_add(&hdev->le_accept_list, &sent->bdaddr,
1878 sent->bdaddr_type);
1879 hci_dev_unlock(hdev);
1880
1881 return rp->status;
1882 }
1883
hci_cc_le_del_from_accept_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1884 static u8 hci_cc_le_del_from_accept_list(struct hci_dev *hdev, void *data,
1885 struct sk_buff *skb)
1886 {
1887 struct hci_cp_le_del_from_accept_list *sent;
1888 struct hci_ev_status *rp = data;
1889
1890 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1891
1892 if (rp->status)
1893 return rp->status;
1894
1895 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_ACCEPT_LIST);
1896 if (!sent)
1897 return rp->status;
1898
1899 hci_dev_lock(hdev);
1900 hci_bdaddr_list_del(&hdev->le_accept_list, &sent->bdaddr,
1901 sent->bdaddr_type);
1902 hci_dev_unlock(hdev);
1903
1904 return rp->status;
1905 }
1906
hci_cc_le_read_supported_states(struct hci_dev * hdev,void * data,struct sk_buff * skb)1907 static u8 hci_cc_le_read_supported_states(struct hci_dev *hdev, void *data,
1908 struct sk_buff *skb)
1909 {
1910 struct hci_rp_le_read_supported_states *rp = data;
1911
1912 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1913
1914 if (rp->status)
1915 return rp->status;
1916
1917 memcpy(hdev->le_states, rp->le_states, 8);
1918
1919 return rp->status;
1920 }
1921
hci_cc_le_read_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1922 static u8 hci_cc_le_read_def_data_len(struct hci_dev *hdev, void *data,
1923 struct sk_buff *skb)
1924 {
1925 struct hci_rp_le_read_def_data_len *rp = data;
1926
1927 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1928
1929 if (rp->status)
1930 return rp->status;
1931
1932 hdev->le_def_tx_len = le16_to_cpu(rp->tx_len);
1933 hdev->le_def_tx_time = le16_to_cpu(rp->tx_time);
1934
1935 return rp->status;
1936 }
1937
hci_cc_le_write_def_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)1938 static u8 hci_cc_le_write_def_data_len(struct hci_dev *hdev, void *data,
1939 struct sk_buff *skb)
1940 {
1941 struct hci_cp_le_write_def_data_len *sent;
1942 struct hci_ev_status *rp = data;
1943
1944 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1945
1946 if (rp->status)
1947 return rp->status;
1948
1949 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_WRITE_DEF_DATA_LEN);
1950 if (!sent)
1951 return rp->status;
1952
1953 hdev->le_def_tx_len = le16_to_cpu(sent->tx_len);
1954 hdev->le_def_tx_time = le16_to_cpu(sent->tx_time);
1955
1956 return rp->status;
1957 }
1958
hci_cc_le_add_to_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1959 static u8 hci_cc_le_add_to_resolv_list(struct hci_dev *hdev, void *data,
1960 struct sk_buff *skb)
1961 {
1962 struct hci_cp_le_add_to_resolv_list *sent;
1963 struct hci_ev_status *rp = data;
1964
1965 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1966
1967 if (rp->status)
1968 return rp->status;
1969
1970 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_ADD_TO_RESOLV_LIST);
1971 if (!sent)
1972 return rp->status;
1973
1974 hci_dev_lock(hdev);
1975 hci_bdaddr_list_add_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
1976 sent->bdaddr_type, sent->peer_irk,
1977 sent->local_irk);
1978 hci_dev_unlock(hdev);
1979
1980 return rp->status;
1981 }
1982
hci_cc_le_del_from_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)1983 static u8 hci_cc_le_del_from_resolv_list(struct hci_dev *hdev, void *data,
1984 struct sk_buff *skb)
1985 {
1986 struct hci_cp_le_del_from_resolv_list *sent;
1987 struct hci_ev_status *rp = data;
1988
1989 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
1990
1991 if (rp->status)
1992 return rp->status;
1993
1994 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_DEL_FROM_RESOLV_LIST);
1995 if (!sent)
1996 return rp->status;
1997
1998 hci_dev_lock(hdev);
1999 hci_bdaddr_list_del_with_irk(&hdev->le_resolv_list, &sent->bdaddr,
2000 sent->bdaddr_type);
2001 hci_dev_unlock(hdev);
2002
2003 return rp->status;
2004 }
2005
hci_cc_le_clear_resolv_list(struct hci_dev * hdev,void * data,struct sk_buff * skb)2006 static u8 hci_cc_le_clear_resolv_list(struct hci_dev *hdev, void *data,
2007 struct sk_buff *skb)
2008 {
2009 struct hci_ev_status *rp = data;
2010
2011 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2012
2013 if (rp->status)
2014 return rp->status;
2015
2016 hci_dev_lock(hdev);
2017 hci_bdaddr_list_clear(&hdev->le_resolv_list);
2018 hci_dev_unlock(hdev);
2019
2020 return rp->status;
2021 }
2022
hci_cc_le_read_resolv_list_size(struct hci_dev * hdev,void * data,struct sk_buff * skb)2023 static u8 hci_cc_le_read_resolv_list_size(struct hci_dev *hdev, void *data,
2024 struct sk_buff *skb)
2025 {
2026 struct hci_rp_le_read_resolv_list_size *rp = data;
2027
2028 bt_dev_dbg(hdev, "status 0x%2.2x size %u", rp->status, rp->size);
2029
2030 if (rp->status)
2031 return rp->status;
2032
2033 hdev->le_resolv_list_size = rp->size;
2034
2035 return rp->status;
2036 }
2037
hci_cc_le_set_addr_resolution_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)2038 static u8 hci_cc_le_set_addr_resolution_enable(struct hci_dev *hdev, void *data,
2039 struct sk_buff *skb)
2040 {
2041 struct hci_ev_status *rp = data;
2042 __u8 *sent;
2043
2044 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2045
2046 if (rp->status)
2047 return rp->status;
2048
2049 sent = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADDR_RESOLV_ENABLE);
2050 if (!sent)
2051 return rp->status;
2052
2053 hci_dev_lock(hdev);
2054
2055 if (*sent)
2056 hci_dev_set_flag(hdev, HCI_LL_RPA_RESOLUTION);
2057 else
2058 hci_dev_clear_flag(hdev, HCI_LL_RPA_RESOLUTION);
2059
2060 hci_dev_unlock(hdev);
2061
2062 return rp->status;
2063 }
2064
hci_cc_le_read_max_data_len(struct hci_dev * hdev,void * data,struct sk_buff * skb)2065 static u8 hci_cc_le_read_max_data_len(struct hci_dev *hdev, void *data,
2066 struct sk_buff *skb)
2067 {
2068 struct hci_rp_le_read_max_data_len *rp = data;
2069
2070 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2071
2072 if (rp->status)
2073 return rp->status;
2074
2075 hdev->le_max_tx_len = le16_to_cpu(rp->tx_len);
2076 hdev->le_max_tx_time = le16_to_cpu(rp->tx_time);
2077 hdev->le_max_rx_len = le16_to_cpu(rp->rx_len);
2078 hdev->le_max_rx_time = le16_to_cpu(rp->rx_time);
2079
2080 return rp->status;
2081 }
2082
hci_cc_write_le_host_supported(struct hci_dev * hdev,void * data,struct sk_buff * skb)2083 static u8 hci_cc_write_le_host_supported(struct hci_dev *hdev, void *data,
2084 struct sk_buff *skb)
2085 {
2086 struct hci_cp_write_le_host_supported *sent;
2087 struct hci_ev_status *rp = data;
2088
2089 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2090
2091 if (rp->status)
2092 return rp->status;
2093
2094 sent = hci_sent_cmd_data(hdev, HCI_OP_WRITE_LE_HOST_SUPPORTED);
2095 if (!sent)
2096 return rp->status;
2097
2098 hci_dev_lock(hdev);
2099
2100 if (sent->le) {
2101 hdev->features[1][0] |= LMP_HOST_LE;
2102 hci_dev_set_flag(hdev, HCI_LE_ENABLED);
2103 } else {
2104 hdev->features[1][0] &= ~LMP_HOST_LE;
2105 hci_dev_clear_flag(hdev, HCI_LE_ENABLED);
2106 hci_dev_clear_flag(hdev, HCI_ADVERTISING);
2107 }
2108
2109 if (sent->simul)
2110 hdev->features[1][0] |= LMP_HOST_LE_BREDR;
2111 else
2112 hdev->features[1][0] &= ~LMP_HOST_LE_BREDR;
2113
2114 hci_dev_unlock(hdev);
2115
2116 return rp->status;
2117 }
2118
hci_cc_set_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2119 static u8 hci_cc_set_adv_param(struct hci_dev *hdev, void *data,
2120 struct sk_buff *skb)
2121 {
2122 struct hci_cp_le_set_adv_param *cp;
2123 struct hci_ev_status *rp = data;
2124
2125 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2126
2127 if (rp->status)
2128 return rp->status;
2129
2130 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_ADV_PARAM);
2131 if (!cp)
2132 return rp->status;
2133
2134 hci_dev_lock(hdev);
2135 hdev->adv_addr_type = cp->own_address_type;
2136 hci_dev_unlock(hdev);
2137
2138 return rp->status;
2139 }
2140
hci_cc_set_ext_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)2141 static u8 hci_cc_set_ext_adv_param(struct hci_dev *hdev, void *data,
2142 struct sk_buff *skb)
2143 {
2144 struct hci_rp_le_set_ext_adv_params *rp = data;
2145 struct hci_cp_le_set_ext_adv_params *cp;
2146 struct adv_info *adv_instance;
2147
2148 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2149
2150 if (rp->status)
2151 return rp->status;
2152
2153 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_EXT_ADV_PARAMS);
2154 if (!cp)
2155 return rp->status;
2156
2157 hci_dev_lock(hdev);
2158 hdev->adv_addr_type = cp->own_addr_type;
2159 if (!cp->handle) {
2160 /* Store in hdev for instance 0 */
2161 hdev->adv_tx_power = rp->tx_power;
2162 } else {
2163 adv_instance = hci_find_adv_instance(hdev, cp->handle);
2164 if (adv_instance)
2165 adv_instance->tx_power = rp->tx_power;
2166 }
2167 /* Update adv data as tx power is known now */
2168 hci_update_adv_data(hdev, cp->handle);
2169
2170 hci_dev_unlock(hdev);
2171
2172 return rp->status;
2173 }
2174
hci_cc_read_rssi(struct hci_dev * hdev,void * data,struct sk_buff * skb)2175 static u8 hci_cc_read_rssi(struct hci_dev *hdev, void *data,
2176 struct sk_buff *skb)
2177 {
2178 struct hci_rp_read_rssi *rp = data;
2179 struct hci_conn *conn;
2180
2181 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2182
2183 if (rp->status)
2184 return rp->status;
2185
2186 hci_dev_lock(hdev);
2187
2188 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2189 if (conn)
2190 conn->rssi = rp->rssi;
2191
2192 hci_dev_unlock(hdev);
2193
2194 return rp->status;
2195 }
2196
hci_cc_read_tx_power(struct hci_dev * hdev,void * data,struct sk_buff * skb)2197 static u8 hci_cc_read_tx_power(struct hci_dev *hdev, void *data,
2198 struct sk_buff *skb)
2199 {
2200 struct hci_cp_read_tx_power *sent;
2201 struct hci_rp_read_tx_power *rp = data;
2202 struct hci_conn *conn;
2203
2204 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2205
2206 if (rp->status)
2207 return rp->status;
2208
2209 sent = hci_sent_cmd_data(hdev, HCI_OP_READ_TX_POWER);
2210 if (!sent)
2211 return rp->status;
2212
2213 hci_dev_lock(hdev);
2214
2215 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(rp->handle));
2216 if (!conn)
2217 goto unlock;
2218
2219 switch (sent->type) {
2220 case 0x00:
2221 conn->tx_power = rp->tx_power;
2222 break;
2223 case 0x01:
2224 conn->max_tx_power = rp->tx_power;
2225 break;
2226 }
2227
2228 unlock:
2229 hci_dev_unlock(hdev);
2230 return rp->status;
2231 }
2232
hci_cc_write_ssp_debug_mode(struct hci_dev * hdev,void * data,struct sk_buff * skb)2233 static u8 hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, void *data,
2234 struct sk_buff *skb)
2235 {
2236 struct hci_ev_status *rp = data;
2237 u8 *mode;
2238
2239 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
2240
2241 if (rp->status)
2242 return rp->status;
2243
2244 mode = hci_sent_cmd_data(hdev, HCI_OP_WRITE_SSP_DEBUG_MODE);
2245 if (mode)
2246 hdev->ssp_debug_mode = *mode;
2247
2248 return rp->status;
2249 }
2250
hci_cs_inquiry(struct hci_dev * hdev,__u8 status)2251 static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status)
2252 {
2253 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2254
2255 if (status)
2256 return;
2257
2258 if (hci_sent_cmd_data(hdev, HCI_OP_INQUIRY))
2259 set_bit(HCI_INQUIRY, &hdev->flags);
2260 }
2261
hci_cs_create_conn(struct hci_dev * hdev,__u8 status)2262 static void hci_cs_create_conn(struct hci_dev *hdev, __u8 status)
2263 {
2264 struct hci_cp_create_conn *cp;
2265 struct hci_conn *conn;
2266
2267 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2268
2269 cp = hci_sent_cmd_data(hdev, HCI_OP_CREATE_CONN);
2270 if (!cp)
2271 return;
2272
2273 hci_dev_lock(hdev);
2274
2275 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2276
2277 bt_dev_dbg(hdev, "bdaddr %pMR hcon %p", &cp->bdaddr, conn);
2278
2279 if (status) {
2280 if (conn && conn->state == BT_CONNECT) {
2281 conn->state = BT_CLOSED;
2282 hci_connect_cfm(conn, status);
2283 hci_conn_del(conn);
2284 }
2285 } else {
2286 if (!conn) {
2287 conn = hci_conn_add_unset(hdev, ACL_LINK, &cp->bdaddr,
2288 HCI_ROLE_MASTER);
2289 if (IS_ERR(conn))
2290 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
2291 }
2292 }
2293
2294 hci_dev_unlock(hdev);
2295 }
2296
hci_cs_add_sco(struct hci_dev * hdev,__u8 status)2297 static void hci_cs_add_sco(struct hci_dev *hdev, __u8 status)
2298 {
2299 struct hci_cp_add_sco *cp;
2300 struct hci_conn *acl;
2301 struct hci_link *link;
2302 __u16 handle;
2303
2304 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2305
2306 if (!status)
2307 return;
2308
2309 cp = hci_sent_cmd_data(hdev, HCI_OP_ADD_SCO);
2310 if (!cp)
2311 return;
2312
2313 handle = __le16_to_cpu(cp->handle);
2314
2315 bt_dev_dbg(hdev, "handle 0x%4.4x", handle);
2316
2317 hci_dev_lock(hdev);
2318
2319 acl = hci_conn_hash_lookup_handle(hdev, handle);
2320 if (acl) {
2321 link = list_first_entry_or_null(&acl->link_list,
2322 struct hci_link, list);
2323 if (link && link->conn) {
2324 link->conn->state = BT_CLOSED;
2325
2326 hci_connect_cfm(link->conn, status);
2327 hci_conn_del(link->conn);
2328 }
2329 }
2330
2331 hci_dev_unlock(hdev);
2332 }
2333
hci_cs_auth_requested(struct hci_dev * hdev,__u8 status)2334 static void hci_cs_auth_requested(struct hci_dev *hdev, __u8 status)
2335 {
2336 struct hci_cp_auth_requested *cp;
2337 struct hci_conn *conn;
2338
2339 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2340
2341 if (!status)
2342 return;
2343
2344 cp = hci_sent_cmd_data(hdev, HCI_OP_AUTH_REQUESTED);
2345 if (!cp)
2346 return;
2347
2348 hci_dev_lock(hdev);
2349
2350 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2351 if (conn) {
2352 if (conn->state == BT_CONFIG) {
2353 hci_connect_cfm(conn, status);
2354 hci_conn_drop(conn);
2355 }
2356 }
2357
2358 hci_dev_unlock(hdev);
2359 }
2360
hci_cs_set_conn_encrypt(struct hci_dev * hdev,__u8 status)2361 static void hci_cs_set_conn_encrypt(struct hci_dev *hdev, __u8 status)
2362 {
2363 struct hci_cp_set_conn_encrypt *cp;
2364 struct hci_conn *conn;
2365
2366 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2367
2368 if (!status)
2369 return;
2370
2371 cp = hci_sent_cmd_data(hdev, HCI_OP_SET_CONN_ENCRYPT);
2372 if (!cp)
2373 return;
2374
2375 hci_dev_lock(hdev);
2376
2377 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2378 if (conn) {
2379 if (conn->state == BT_CONFIG) {
2380 hci_connect_cfm(conn, status);
2381 hci_conn_drop(conn);
2382 }
2383 }
2384
2385 hci_dev_unlock(hdev);
2386 }
2387
hci_outgoing_auth_needed(struct hci_dev * hdev,struct hci_conn * conn)2388 static int hci_outgoing_auth_needed(struct hci_dev *hdev,
2389 struct hci_conn *conn)
2390 {
2391 if (conn->state != BT_CONFIG || !conn->out)
2392 return 0;
2393
2394 if (conn->pending_sec_level == BT_SECURITY_SDP)
2395 return 0;
2396
2397 /* Only request authentication for SSP connections or non-SSP
2398 * devices with sec_level MEDIUM or HIGH or if MITM protection
2399 * is requested.
2400 */
2401 if (!hci_conn_ssp_enabled(conn) && !(conn->auth_type & 0x01) &&
2402 conn->pending_sec_level != BT_SECURITY_FIPS &&
2403 conn->pending_sec_level != BT_SECURITY_HIGH &&
2404 conn->pending_sec_level != BT_SECURITY_MEDIUM)
2405 return 0;
2406
2407 return 1;
2408 }
2409
hci_resolve_name(struct hci_dev * hdev,struct inquiry_entry * e)2410 static int hci_resolve_name(struct hci_dev *hdev,
2411 struct inquiry_entry *e)
2412 {
2413 struct hci_cp_remote_name_req cp;
2414
2415 memset(&cp, 0, sizeof(cp));
2416
2417 bacpy(&cp.bdaddr, &e->data.bdaddr);
2418 cp.pscan_rep_mode = e->data.pscan_rep_mode;
2419 cp.pscan_mode = e->data.pscan_mode;
2420 cp.clock_offset = e->data.clock_offset;
2421
2422 return hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
2423 }
2424
hci_resolve_next_name(struct hci_dev * hdev)2425 static bool hci_resolve_next_name(struct hci_dev *hdev)
2426 {
2427 struct discovery_state *discov = &hdev->discovery;
2428 struct inquiry_entry *e;
2429
2430 if (list_empty(&discov->resolve))
2431 return false;
2432
2433 /* We should stop if we already spent too much time resolving names. */
2434 if (time_after(jiffies, discov->name_resolve_timeout)) {
2435 bt_dev_warn_ratelimited(hdev, "Name resolve takes too long.");
2436 return false;
2437 }
2438
2439 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
2440 if (!e)
2441 return false;
2442
2443 if (hci_resolve_name(hdev, e) == 0) {
2444 e->name_state = NAME_PENDING;
2445 return true;
2446 }
2447
2448 return false;
2449 }
2450
hci_check_pending_name(struct hci_dev * hdev,struct hci_conn * conn,bdaddr_t * bdaddr,u8 * name,u8 name_len)2451 static void hci_check_pending_name(struct hci_dev *hdev, struct hci_conn *conn,
2452 bdaddr_t *bdaddr, u8 *name, u8 name_len)
2453 {
2454 struct discovery_state *discov = &hdev->discovery;
2455 struct inquiry_entry *e;
2456
2457 /* Update the mgmt connected state if necessary. Be careful with
2458 * conn objects that exist but are not (yet) connected however.
2459 * Only those in BT_CONFIG or BT_CONNECTED states can be
2460 * considered connected.
2461 */
2462 if (conn && (conn->state == BT_CONFIG || conn->state == BT_CONNECTED))
2463 mgmt_device_connected(hdev, conn, name, name_len);
2464
2465 if (discov->state == DISCOVERY_STOPPED)
2466 return;
2467
2468 if (discov->state == DISCOVERY_STOPPING)
2469 goto discov_complete;
2470
2471 if (discov->state != DISCOVERY_RESOLVING)
2472 return;
2473
2474 e = hci_inquiry_cache_lookup_resolve(hdev, bdaddr, NAME_PENDING);
2475 /* If the device was not found in a list of found devices names of which
2476 * are pending. there is no need to continue resolving a next name as it
2477 * will be done upon receiving another Remote Name Request Complete
2478 * Event */
2479 if (!e)
2480 return;
2481
2482 list_del(&e->list);
2483
2484 e->name_state = name ? NAME_KNOWN : NAME_NOT_KNOWN;
2485 mgmt_remote_name(hdev, bdaddr, ACL_LINK, 0x00, e->data.rssi,
2486 name, name_len);
2487
2488 if (hci_resolve_next_name(hdev))
2489 return;
2490
2491 discov_complete:
2492 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2493 }
2494
hci_cs_remote_name_req(struct hci_dev * hdev,__u8 status)2495 static void hci_cs_remote_name_req(struct hci_dev *hdev, __u8 status)
2496 {
2497 struct hci_cp_remote_name_req *cp;
2498 struct hci_conn *conn;
2499
2500 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2501
2502 /* If successful wait for the name req complete event before
2503 * checking for the need to do authentication */
2504 if (!status)
2505 return;
2506
2507 cp = hci_sent_cmd_data(hdev, HCI_OP_REMOTE_NAME_REQ);
2508 if (!cp)
2509 return;
2510
2511 hci_dev_lock(hdev);
2512
2513 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2514
2515 if (hci_dev_test_flag(hdev, HCI_MGMT))
2516 hci_check_pending_name(hdev, conn, &cp->bdaddr, NULL, 0);
2517
2518 if (!conn)
2519 goto unlock;
2520
2521 if (!hci_outgoing_auth_needed(hdev, conn))
2522 goto unlock;
2523
2524 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
2525 struct hci_cp_auth_requested auth_cp;
2526
2527 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
2528
2529 auth_cp.handle = __cpu_to_le16(conn->handle);
2530 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED,
2531 sizeof(auth_cp), &auth_cp);
2532 }
2533
2534 unlock:
2535 hci_dev_unlock(hdev);
2536 }
2537
hci_cs_read_remote_features(struct hci_dev * hdev,__u8 status)2538 static void hci_cs_read_remote_features(struct hci_dev *hdev, __u8 status)
2539 {
2540 struct hci_cp_read_remote_features *cp;
2541 struct hci_conn *conn;
2542
2543 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2544
2545 if (!status)
2546 return;
2547
2548 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_FEATURES);
2549 if (!cp)
2550 return;
2551
2552 hci_dev_lock(hdev);
2553
2554 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2555 if (conn) {
2556 if (conn->state == BT_CONFIG) {
2557 hci_connect_cfm(conn, status);
2558 hci_conn_drop(conn);
2559 }
2560 }
2561
2562 hci_dev_unlock(hdev);
2563 }
2564
hci_cs_read_remote_ext_features(struct hci_dev * hdev,__u8 status)2565 static void hci_cs_read_remote_ext_features(struct hci_dev *hdev, __u8 status)
2566 {
2567 struct hci_cp_read_remote_ext_features *cp;
2568 struct hci_conn *conn;
2569
2570 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2571
2572 if (!status)
2573 return;
2574
2575 cp = hci_sent_cmd_data(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES);
2576 if (!cp)
2577 return;
2578
2579 hci_dev_lock(hdev);
2580
2581 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2582 if (conn) {
2583 if (conn->state == BT_CONFIG) {
2584 hci_connect_cfm(conn, status);
2585 hci_conn_drop(conn);
2586 }
2587 }
2588
2589 hci_dev_unlock(hdev);
2590 }
2591
hci_setup_sync_conn_status(struct hci_dev * hdev,__u16 handle,__u8 status)2592 static void hci_setup_sync_conn_status(struct hci_dev *hdev, __u16 handle,
2593 __u8 status)
2594 {
2595 struct hci_conn *acl;
2596 struct hci_link *link;
2597
2598 bt_dev_dbg(hdev, "handle 0x%4.4x status 0x%2.2x", handle, status);
2599
2600 hci_dev_lock(hdev);
2601
2602 acl = hci_conn_hash_lookup_handle(hdev, handle);
2603 if (acl) {
2604 link = list_first_entry_or_null(&acl->link_list,
2605 struct hci_link, list);
2606 if (link && link->conn) {
2607 link->conn->state = BT_CLOSED;
2608
2609 hci_connect_cfm(link->conn, status);
2610 hci_conn_del(link->conn);
2611 }
2612 }
2613
2614 hci_dev_unlock(hdev);
2615 }
2616
hci_cs_setup_sync_conn(struct hci_dev * hdev,__u8 status)2617 static void hci_cs_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2618 {
2619 struct hci_cp_setup_sync_conn *cp;
2620
2621 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2622
2623 if (!status)
2624 return;
2625
2626 cp = hci_sent_cmd_data(hdev, HCI_OP_SETUP_SYNC_CONN);
2627 if (!cp)
2628 return;
2629
2630 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2631 }
2632
hci_cs_enhanced_setup_sync_conn(struct hci_dev * hdev,__u8 status)2633 static void hci_cs_enhanced_setup_sync_conn(struct hci_dev *hdev, __u8 status)
2634 {
2635 struct hci_cp_enhanced_setup_sync_conn *cp;
2636
2637 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2638
2639 if (!status)
2640 return;
2641
2642 cp = hci_sent_cmd_data(hdev, HCI_OP_ENHANCED_SETUP_SYNC_CONN);
2643 if (!cp)
2644 return;
2645
2646 hci_setup_sync_conn_status(hdev, __le16_to_cpu(cp->handle), status);
2647 }
2648
hci_cs_sniff_mode(struct hci_dev * hdev,__u8 status)2649 static void hci_cs_sniff_mode(struct hci_dev *hdev, __u8 status)
2650 {
2651 struct hci_cp_sniff_mode *cp;
2652 struct hci_conn *conn;
2653
2654 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2655
2656 if (!status)
2657 return;
2658
2659 cp = hci_sent_cmd_data(hdev, HCI_OP_SNIFF_MODE);
2660 if (!cp)
2661 return;
2662
2663 hci_dev_lock(hdev);
2664
2665 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2666 if (conn) {
2667 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2668
2669 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2670 hci_sco_setup(conn, status);
2671 }
2672
2673 hci_dev_unlock(hdev);
2674 }
2675
hci_cs_exit_sniff_mode(struct hci_dev * hdev,__u8 status)2676 static void hci_cs_exit_sniff_mode(struct hci_dev *hdev, __u8 status)
2677 {
2678 struct hci_cp_exit_sniff_mode *cp;
2679 struct hci_conn *conn;
2680
2681 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2682
2683 if (!status)
2684 return;
2685
2686 cp = hci_sent_cmd_data(hdev, HCI_OP_EXIT_SNIFF_MODE);
2687 if (!cp)
2688 return;
2689
2690 hci_dev_lock(hdev);
2691
2692 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2693 if (conn) {
2694 clear_bit(HCI_CONN_MODE_CHANGE_PEND, &conn->flags);
2695
2696 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
2697 hci_sco_setup(conn, status);
2698 }
2699
2700 hci_dev_unlock(hdev);
2701 }
2702
hci_cs_disconnect(struct hci_dev * hdev,u8 status)2703 static void hci_cs_disconnect(struct hci_dev *hdev, u8 status)
2704 {
2705 struct hci_cp_disconnect *cp;
2706 struct hci_conn_params *params;
2707 struct hci_conn *conn;
2708 bool mgmt_conn;
2709
2710 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2711
2712 /* Wait for HCI_EV_DISCONN_COMPLETE if status 0x00 and not suspended
2713 * otherwise cleanup the connection immediately.
2714 */
2715 if (!status && !hdev->suspended)
2716 return;
2717
2718 cp = hci_sent_cmd_data(hdev, HCI_OP_DISCONNECT);
2719 if (!cp)
2720 return;
2721
2722 hci_dev_lock(hdev);
2723
2724 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2725 if (!conn)
2726 goto unlock;
2727
2728 if (status) {
2729 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
2730 conn->dst_type, status);
2731
2732 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
2733 hdev->cur_adv_instance = conn->adv_instance;
2734 hci_enable_advertising(hdev);
2735 }
2736
2737 /* Inform sockets conn is gone before we delete it */
2738 hci_disconn_cfm(conn, HCI_ERROR_UNSPECIFIED);
2739
2740 goto done;
2741 }
2742
2743 mgmt_conn = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
2744
2745 if (conn->type == ACL_LINK) {
2746 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
2747 hci_remove_link_key(hdev, &conn->dst);
2748 }
2749
2750 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
2751 if (params) {
2752 switch (params->auto_connect) {
2753 case HCI_AUTO_CONN_LINK_LOSS:
2754 if (cp->reason != HCI_ERROR_CONNECTION_TIMEOUT)
2755 break;
2756 fallthrough;
2757
2758 case HCI_AUTO_CONN_DIRECT:
2759 case HCI_AUTO_CONN_ALWAYS:
2760 hci_pend_le_list_del_init(params);
2761 hci_pend_le_list_add(params, &hdev->pend_le_conns);
2762 break;
2763
2764 default:
2765 break;
2766 }
2767 }
2768
2769 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
2770 cp->reason, mgmt_conn);
2771
2772 hci_disconn_cfm(conn, cp->reason);
2773
2774 done:
2775 /* If the disconnection failed for any reason, the upper layer
2776 * does not retry to disconnect in current implementation.
2777 * Hence, we need to do some basic cleanup here and re-enable
2778 * advertising if necessary.
2779 */
2780 hci_conn_del(conn);
2781 unlock:
2782 hci_dev_unlock(hdev);
2783 }
2784
ev_bdaddr_type(struct hci_dev * hdev,u8 type,bool * resolved)2785 static u8 ev_bdaddr_type(struct hci_dev *hdev, u8 type, bool *resolved)
2786 {
2787 /* When using controller based address resolution, then the new
2788 * address types 0x02 and 0x03 are used. These types need to be
2789 * converted back into either public address or random address type
2790 */
2791 switch (type) {
2792 case ADDR_LE_DEV_PUBLIC_RESOLVED:
2793 if (resolved)
2794 *resolved = true;
2795 return ADDR_LE_DEV_PUBLIC;
2796 case ADDR_LE_DEV_RANDOM_RESOLVED:
2797 if (resolved)
2798 *resolved = true;
2799 return ADDR_LE_DEV_RANDOM;
2800 }
2801
2802 if (resolved)
2803 *resolved = false;
2804 return type;
2805 }
2806
cs_le_create_conn(struct hci_dev * hdev,bdaddr_t * peer_addr,u8 peer_addr_type,u8 own_address_type,u8 filter_policy)2807 static void cs_le_create_conn(struct hci_dev *hdev, bdaddr_t *peer_addr,
2808 u8 peer_addr_type, u8 own_address_type,
2809 u8 filter_policy)
2810 {
2811 struct hci_conn *conn;
2812
2813 conn = hci_conn_hash_lookup_le(hdev, peer_addr,
2814 peer_addr_type);
2815 if (!conn)
2816 return;
2817
2818 own_address_type = ev_bdaddr_type(hdev, own_address_type, NULL);
2819
2820 /* Store the initiator and responder address information which
2821 * is needed for SMP. These values will not change during the
2822 * lifetime of the connection.
2823 */
2824 conn->init_addr_type = own_address_type;
2825 if (own_address_type == ADDR_LE_DEV_RANDOM)
2826 bacpy(&conn->init_addr, &hdev->random_addr);
2827 else
2828 bacpy(&conn->init_addr, &hdev->bdaddr);
2829
2830 conn->resp_addr_type = peer_addr_type;
2831 bacpy(&conn->resp_addr, peer_addr);
2832 }
2833
hci_cs_le_create_conn(struct hci_dev * hdev,u8 status)2834 static void hci_cs_le_create_conn(struct hci_dev *hdev, u8 status)
2835 {
2836 struct hci_cp_le_create_conn *cp;
2837
2838 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2839
2840 /* All connection failure handling is taken care of by the
2841 * hci_conn_failed function which is triggered by the HCI
2842 * request completion callbacks used for connecting.
2843 */
2844 if (status)
2845 return;
2846
2847 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CONN);
2848 if (!cp)
2849 return;
2850
2851 hci_dev_lock(hdev);
2852
2853 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2854 cp->own_address_type, cp->filter_policy);
2855
2856 hci_dev_unlock(hdev);
2857 }
2858
hci_cs_le_ext_create_conn(struct hci_dev * hdev,u8 status)2859 static void hci_cs_le_ext_create_conn(struct hci_dev *hdev, u8 status)
2860 {
2861 struct hci_cp_le_ext_create_conn *cp;
2862
2863 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2864
2865 /* All connection failure handling is taken care of by the
2866 * hci_conn_failed function which is triggered by the HCI
2867 * request completion callbacks used for connecting.
2868 */
2869 if (status)
2870 return;
2871
2872 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_EXT_CREATE_CONN);
2873 if (!cp)
2874 return;
2875
2876 hci_dev_lock(hdev);
2877
2878 cs_le_create_conn(hdev, &cp->peer_addr, cp->peer_addr_type,
2879 cp->own_addr_type, cp->filter_policy);
2880
2881 hci_dev_unlock(hdev);
2882 }
2883
hci_cs_le_read_remote_features(struct hci_dev * hdev,u8 status)2884 static void hci_cs_le_read_remote_features(struct hci_dev *hdev, u8 status)
2885 {
2886 struct hci_cp_le_read_remote_features *cp;
2887 struct hci_conn *conn;
2888
2889 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2890
2891 if (!status)
2892 return;
2893
2894 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_READ_REMOTE_FEATURES);
2895 if (!cp)
2896 return;
2897
2898 hci_dev_lock(hdev);
2899
2900 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2901 if (conn) {
2902 if (conn->state == BT_CONFIG) {
2903 hci_connect_cfm(conn, status);
2904 hci_conn_drop(conn);
2905 }
2906 }
2907
2908 hci_dev_unlock(hdev);
2909 }
2910
hci_cs_le_start_enc(struct hci_dev * hdev,u8 status)2911 static void hci_cs_le_start_enc(struct hci_dev *hdev, u8 status)
2912 {
2913 struct hci_cp_le_start_enc *cp;
2914 struct hci_conn *conn;
2915
2916 bt_dev_dbg(hdev, "status 0x%2.2x", status);
2917
2918 if (!status)
2919 return;
2920
2921 hci_dev_lock(hdev);
2922
2923 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_START_ENC);
2924 if (!cp)
2925 goto unlock;
2926
2927 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
2928 if (!conn)
2929 goto unlock;
2930
2931 if (conn->state != BT_CONNECTED)
2932 goto unlock;
2933
2934 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
2935 hci_conn_drop(conn);
2936
2937 unlock:
2938 hci_dev_unlock(hdev);
2939 }
2940
hci_cs_switch_role(struct hci_dev * hdev,u8 status)2941 static void hci_cs_switch_role(struct hci_dev *hdev, u8 status)
2942 {
2943 struct hci_cp_switch_role *cp;
2944 struct hci_conn *conn;
2945
2946 BT_DBG("%s status 0x%2.2x", hdev->name, status);
2947
2948 if (!status)
2949 return;
2950
2951 cp = hci_sent_cmd_data(hdev, HCI_OP_SWITCH_ROLE);
2952 if (!cp)
2953 return;
2954
2955 hci_dev_lock(hdev);
2956
2957 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &cp->bdaddr);
2958 if (conn)
2959 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
2960
2961 hci_dev_unlock(hdev);
2962 }
2963
hci_inquiry_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)2964 static void hci_inquiry_complete_evt(struct hci_dev *hdev, void *data,
2965 struct sk_buff *skb)
2966 {
2967 struct hci_ev_status *ev = data;
2968 struct discovery_state *discov = &hdev->discovery;
2969 struct inquiry_entry *e;
2970
2971 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
2972
2973 if (!test_and_clear_bit(HCI_INQUIRY, &hdev->flags))
2974 return;
2975
2976 smp_mb__after_atomic(); /* wake_up_bit advises about this barrier */
2977 wake_up_bit(&hdev->flags, HCI_INQUIRY);
2978
2979 if (!hci_dev_test_flag(hdev, HCI_MGMT))
2980 return;
2981
2982 hci_dev_lock(hdev);
2983
2984 if (discov->state != DISCOVERY_FINDING)
2985 goto unlock;
2986
2987 if (list_empty(&discov->resolve)) {
2988 /* When BR/EDR inquiry is active and no LE scanning is in
2989 * progress, then change discovery state to indicate completion.
2990 *
2991 * When running LE scanning and BR/EDR inquiry simultaneously
2992 * and the LE scan already finished, then change the discovery
2993 * state to indicate completion.
2994 */
2995 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
2996 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
2997 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
2998 goto unlock;
2999 }
3000
3001 e = hci_inquiry_cache_lookup_resolve(hdev, BDADDR_ANY, NAME_NEEDED);
3002 if (e && hci_resolve_name(hdev, e) == 0) {
3003 e->name_state = NAME_PENDING;
3004 hci_discovery_set_state(hdev, DISCOVERY_RESOLVING);
3005 discov->name_resolve_timeout = jiffies + NAME_RESOLVE_DURATION;
3006 } else {
3007 /* When BR/EDR inquiry is active and no LE scanning is in
3008 * progress, then change discovery state to indicate completion.
3009 *
3010 * When running LE scanning and BR/EDR inquiry simultaneously
3011 * and the LE scan already finished, then change the discovery
3012 * state to indicate completion.
3013 */
3014 if (!hci_dev_test_flag(hdev, HCI_LE_SCAN) ||
3015 !test_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks))
3016 hci_discovery_set_state(hdev, DISCOVERY_STOPPED);
3017 }
3018
3019 unlock:
3020 hci_dev_unlock(hdev);
3021 }
3022
hci_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)3023 static void hci_inquiry_result_evt(struct hci_dev *hdev, void *edata,
3024 struct sk_buff *skb)
3025 {
3026 struct hci_ev_inquiry_result *ev = edata;
3027 struct inquiry_data data;
3028 int i;
3029
3030 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_INQUIRY_RESULT,
3031 flex_array_size(ev, info, ev->num)))
3032 return;
3033
3034 bt_dev_dbg(hdev, "num %d", ev->num);
3035
3036 if (!ev->num)
3037 return;
3038
3039 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
3040 return;
3041
3042 hci_dev_lock(hdev);
3043
3044 for (i = 0; i < ev->num; i++) {
3045 struct inquiry_info *info = &ev->info[i];
3046 u32 flags;
3047
3048 bacpy(&data.bdaddr, &info->bdaddr);
3049 data.pscan_rep_mode = info->pscan_rep_mode;
3050 data.pscan_period_mode = info->pscan_period_mode;
3051 data.pscan_mode = info->pscan_mode;
3052 memcpy(data.dev_class, info->dev_class, 3);
3053 data.clock_offset = info->clock_offset;
3054 data.rssi = HCI_RSSI_INVALID;
3055 data.ssp_mode = 0x00;
3056
3057 flags = hci_inquiry_cache_update(hdev, &data, false);
3058
3059 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
3060 info->dev_class, HCI_RSSI_INVALID,
3061 flags, NULL, 0, NULL, 0, 0);
3062 }
3063
3064 hci_dev_unlock(hdev);
3065 }
3066
hci_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3067 static void hci_conn_complete_evt(struct hci_dev *hdev, void *data,
3068 struct sk_buff *skb)
3069 {
3070 struct hci_ev_conn_complete *ev = data;
3071 struct hci_conn *conn;
3072 u8 status = ev->status;
3073
3074 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3075
3076 hci_dev_lock(hdev);
3077
3078 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
3079 if (!conn) {
3080 /* In case of error status and there is no connection pending
3081 * just unlock as there is nothing to cleanup.
3082 */
3083 if (ev->status)
3084 goto unlock;
3085
3086 /* Connection may not exist if auto-connected. Check the bredr
3087 * allowlist to see if this device is allowed to auto connect.
3088 * If link is an ACL type, create a connection class
3089 * automatically.
3090 *
3091 * Auto-connect will only occur if the event filter is
3092 * programmed with a given address. Right now, event filter is
3093 * only used during suspend.
3094 */
3095 if (ev->link_type == ACL_LINK &&
3096 hci_bdaddr_list_lookup_with_flags(&hdev->accept_list,
3097 &ev->bdaddr,
3098 BDADDR_BREDR)) {
3099 conn = hci_conn_add_unset(hdev, ev->link_type,
3100 &ev->bdaddr, HCI_ROLE_SLAVE);
3101 if (IS_ERR(conn)) {
3102 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3103 goto unlock;
3104 }
3105 } else {
3106 if (ev->link_type != SCO_LINK)
3107 goto unlock;
3108
3109 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK,
3110 &ev->bdaddr);
3111 if (!conn)
3112 goto unlock;
3113
3114 conn->type = SCO_LINK;
3115 }
3116 }
3117
3118 /* The HCI_Connection_Complete event is only sent once per connection.
3119 * Processing it more than once per connection can corrupt kernel memory.
3120 *
3121 * As the connection handle is set here for the first time, it indicates
3122 * whether the connection is already set up.
3123 */
3124 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
3125 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
3126 goto unlock;
3127 }
3128
3129 if (!status) {
3130 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
3131 if (status)
3132 goto done;
3133
3134 if (conn->type == ACL_LINK) {
3135 conn->state = BT_CONFIG;
3136 hci_conn_hold(conn);
3137
3138 if (!conn->out && !hci_conn_ssp_enabled(conn) &&
3139 !hci_find_link_key(hdev, &ev->bdaddr))
3140 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
3141 else
3142 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3143 } else
3144 conn->state = BT_CONNECTED;
3145
3146 hci_debugfs_create_conn(conn);
3147 hci_conn_add_sysfs(conn);
3148
3149 if (test_bit(HCI_AUTH, &hdev->flags))
3150 set_bit(HCI_CONN_AUTH, &conn->flags);
3151
3152 if (test_bit(HCI_ENCRYPT, &hdev->flags))
3153 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3154
3155 /* "Link key request" completed ahead of "connect request" completes */
3156 if (ev->encr_mode == 1 && !test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3157 ev->link_type == ACL_LINK) {
3158 struct link_key *key;
3159 struct hci_cp_read_enc_key_size cp;
3160
3161 key = hci_find_link_key(hdev, &ev->bdaddr);
3162 if (key) {
3163 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3164
3165 if (!read_key_size_capable(hdev)) {
3166 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3167 } else {
3168 cp.handle = cpu_to_le16(conn->handle);
3169 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3170 sizeof(cp), &cp)) {
3171 bt_dev_err(hdev, "sending read key size failed");
3172 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3173 }
3174 }
3175
3176 hci_encrypt_cfm(conn, ev->status);
3177 }
3178 }
3179
3180 /* Get remote features */
3181 if (conn->type == ACL_LINK) {
3182 struct hci_cp_read_remote_features cp;
3183 cp.handle = ev->handle;
3184 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_FEATURES,
3185 sizeof(cp), &cp);
3186
3187 hci_update_scan(hdev);
3188 }
3189
3190 /* Set packet type for incoming connection */
3191 if (!conn->out && hdev->hci_ver < BLUETOOTH_VER_2_0) {
3192 struct hci_cp_change_conn_ptype cp;
3193 cp.handle = ev->handle;
3194 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3195 hci_send_cmd(hdev, HCI_OP_CHANGE_CONN_PTYPE, sizeof(cp),
3196 &cp);
3197 }
3198 }
3199
3200 if (conn->type == ACL_LINK)
3201 hci_sco_setup(conn, ev->status);
3202
3203 done:
3204 if (status) {
3205 hci_conn_failed(conn, status);
3206 } else if (ev->link_type == SCO_LINK) {
3207 switch (conn->setting & SCO_AIRMODE_MASK) {
3208 case SCO_AIRMODE_CVSD:
3209 if (hdev->notify)
3210 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
3211 break;
3212 }
3213
3214 hci_connect_cfm(conn, status);
3215 }
3216
3217 unlock:
3218 hci_dev_unlock(hdev);
3219 }
3220
hci_reject_conn(struct hci_dev * hdev,bdaddr_t * bdaddr)3221 static void hci_reject_conn(struct hci_dev *hdev, bdaddr_t *bdaddr)
3222 {
3223 struct hci_cp_reject_conn_req cp;
3224
3225 bacpy(&cp.bdaddr, bdaddr);
3226 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
3227 hci_send_cmd(hdev, HCI_OP_REJECT_CONN_REQ, sizeof(cp), &cp);
3228 }
3229
hci_conn_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3230 static void hci_conn_request_evt(struct hci_dev *hdev, void *data,
3231 struct sk_buff *skb)
3232 {
3233 struct hci_ev_conn_request *ev = data;
3234 int mask = hdev->link_mode;
3235 struct inquiry_entry *ie;
3236 struct hci_conn *conn;
3237 __u8 flags = 0;
3238
3239 bt_dev_dbg(hdev, "bdaddr %pMR type 0x%x", &ev->bdaddr, ev->link_type);
3240
3241 /* Reject incoming connection from device with same BD ADDR against
3242 * CVE-2020-26555
3243 */
3244 if (hdev && !bacmp(&hdev->bdaddr, &ev->bdaddr)) {
3245 bt_dev_dbg(hdev, "Reject connection with same BD_ADDR %pMR\n",
3246 &ev->bdaddr);
3247 hci_reject_conn(hdev, &ev->bdaddr);
3248 return;
3249 }
3250
3251 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ev->link_type,
3252 &flags);
3253
3254 if (!(mask & HCI_LM_ACCEPT)) {
3255 hci_reject_conn(hdev, &ev->bdaddr);
3256 return;
3257 }
3258
3259 hci_dev_lock(hdev);
3260
3261 if (hci_bdaddr_list_lookup(&hdev->reject_list, &ev->bdaddr,
3262 BDADDR_BREDR)) {
3263 hci_reject_conn(hdev, &ev->bdaddr);
3264 goto unlock;
3265 }
3266
3267 /* Require HCI_CONNECTABLE or an accept list entry to accept the
3268 * connection. These features are only touched through mgmt so
3269 * only do the checks if HCI_MGMT is set.
3270 */
3271 if (hci_dev_test_flag(hdev, HCI_MGMT) &&
3272 !hci_dev_test_flag(hdev, HCI_CONNECTABLE) &&
3273 !hci_bdaddr_list_lookup_with_flags(&hdev->accept_list, &ev->bdaddr,
3274 BDADDR_BREDR)) {
3275 hci_reject_conn(hdev, &ev->bdaddr);
3276 goto unlock;
3277 }
3278
3279 /* Connection accepted */
3280
3281 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
3282 if (ie)
3283 memcpy(ie->data.dev_class, ev->dev_class, 3);
3284
3285 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type,
3286 &ev->bdaddr);
3287 if (!conn) {
3288 conn = hci_conn_add_unset(hdev, ev->link_type, &ev->bdaddr,
3289 HCI_ROLE_SLAVE);
3290 if (IS_ERR(conn)) {
3291 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
3292 goto unlock;
3293 }
3294 }
3295
3296 memcpy(conn->dev_class, ev->dev_class, 3);
3297
3298 hci_dev_unlock(hdev);
3299
3300 if (ev->link_type == ACL_LINK ||
3301 (!(flags & HCI_PROTO_DEFER) && !lmp_esco_capable(hdev))) {
3302 struct hci_cp_accept_conn_req cp;
3303 conn->state = BT_CONNECT;
3304
3305 bacpy(&cp.bdaddr, &ev->bdaddr);
3306
3307 if (lmp_rswitch_capable(hdev) && (mask & HCI_LM_MASTER))
3308 cp.role = 0x00; /* Become central */
3309 else
3310 cp.role = 0x01; /* Remain peripheral */
3311
3312 hci_send_cmd(hdev, HCI_OP_ACCEPT_CONN_REQ, sizeof(cp), &cp);
3313 } else if (!(flags & HCI_PROTO_DEFER)) {
3314 struct hci_cp_accept_sync_conn_req cp;
3315 conn->state = BT_CONNECT;
3316
3317 bacpy(&cp.bdaddr, &ev->bdaddr);
3318 cp.pkt_type = cpu_to_le16(conn->pkt_type);
3319
3320 cp.tx_bandwidth = cpu_to_le32(0x00001f40);
3321 cp.rx_bandwidth = cpu_to_le32(0x00001f40);
3322 cp.max_latency = cpu_to_le16(0xffff);
3323 cp.content_format = cpu_to_le16(hdev->voice_setting);
3324 cp.retrans_effort = 0xff;
3325
3326 hci_send_cmd(hdev, HCI_OP_ACCEPT_SYNC_CONN_REQ, sizeof(cp),
3327 &cp);
3328 } else {
3329 conn->state = BT_CONNECT2;
3330 hci_connect_cfm(conn, 0);
3331 }
3332
3333 return;
3334 unlock:
3335 hci_dev_unlock(hdev);
3336 }
3337
hci_to_mgmt_reason(u8 err)3338 static u8 hci_to_mgmt_reason(u8 err)
3339 {
3340 switch (err) {
3341 case HCI_ERROR_CONNECTION_TIMEOUT:
3342 return MGMT_DEV_DISCONN_TIMEOUT;
3343 case HCI_ERROR_REMOTE_USER_TERM:
3344 case HCI_ERROR_REMOTE_LOW_RESOURCES:
3345 case HCI_ERROR_REMOTE_POWER_OFF:
3346 return MGMT_DEV_DISCONN_REMOTE;
3347 case HCI_ERROR_LOCAL_HOST_TERM:
3348 return MGMT_DEV_DISCONN_LOCAL_HOST;
3349 default:
3350 return MGMT_DEV_DISCONN_UNKNOWN;
3351 }
3352 }
3353
hci_disconn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3354 static void hci_disconn_complete_evt(struct hci_dev *hdev, void *data,
3355 struct sk_buff *skb)
3356 {
3357 struct hci_ev_disconn_complete *ev = data;
3358 u8 reason;
3359 struct hci_conn_params *params;
3360 struct hci_conn *conn;
3361 bool mgmt_connected;
3362
3363 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3364
3365 hci_dev_lock(hdev);
3366
3367 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3368 if (!conn)
3369 goto unlock;
3370
3371 if (ev->status) {
3372 mgmt_disconnect_failed(hdev, &conn->dst, conn->type,
3373 conn->dst_type, ev->status);
3374 goto unlock;
3375 }
3376
3377 conn->state = BT_CLOSED;
3378
3379 mgmt_connected = test_and_clear_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags);
3380
3381 if (test_bit(HCI_CONN_AUTH_FAILURE, &conn->flags))
3382 reason = MGMT_DEV_DISCONN_AUTH_FAILURE;
3383 else
3384 reason = hci_to_mgmt_reason(ev->reason);
3385
3386 mgmt_device_disconnected(hdev, &conn->dst, conn->type, conn->dst_type,
3387 reason, mgmt_connected);
3388
3389 if (conn->type == ACL_LINK) {
3390 if (test_and_clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags))
3391 hci_remove_link_key(hdev, &conn->dst);
3392
3393 hci_update_scan(hdev);
3394 }
3395
3396 params = hci_conn_params_lookup(hdev, &conn->dst, conn->dst_type);
3397 if (params) {
3398 switch (params->auto_connect) {
3399 case HCI_AUTO_CONN_LINK_LOSS:
3400 if (ev->reason != HCI_ERROR_CONNECTION_TIMEOUT)
3401 break;
3402 fallthrough;
3403
3404 case HCI_AUTO_CONN_DIRECT:
3405 case HCI_AUTO_CONN_ALWAYS:
3406 hci_pend_le_list_del_init(params);
3407 hci_pend_le_list_add(params, &hdev->pend_le_conns);
3408 hci_update_passive_scan(hdev);
3409 break;
3410
3411 default:
3412 break;
3413 }
3414 }
3415
3416 hci_disconn_cfm(conn, ev->reason);
3417
3418 /* Re-enable advertising if necessary, since it might
3419 * have been disabled by the connection. From the
3420 * HCI_LE_Set_Advertise_Enable command description in
3421 * the core specification (v4.0):
3422 * "The Controller shall continue advertising until the Host
3423 * issues an LE_Set_Advertise_Enable command with
3424 * Advertising_Enable set to 0x00 (Advertising is disabled)
3425 * or until a connection is created or until the Advertising
3426 * is timed out due to Directed Advertising."
3427 */
3428 if (conn->type == LE_LINK && conn->role == HCI_ROLE_SLAVE) {
3429 hdev->cur_adv_instance = conn->adv_instance;
3430 hci_enable_advertising(hdev);
3431 }
3432
3433 hci_conn_del(conn);
3434
3435 unlock:
3436 hci_dev_unlock(hdev);
3437 }
3438
hci_auth_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3439 static void hci_auth_complete_evt(struct hci_dev *hdev, void *data,
3440 struct sk_buff *skb)
3441 {
3442 struct hci_ev_auth_complete *ev = data;
3443 struct hci_conn *conn;
3444
3445 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3446
3447 hci_dev_lock(hdev);
3448
3449 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3450 if (!conn)
3451 goto unlock;
3452
3453 if (!ev->status) {
3454 clear_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3455 set_bit(HCI_CONN_AUTH, &conn->flags);
3456 conn->sec_level = conn->pending_sec_level;
3457 } else {
3458 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3459 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3460
3461 mgmt_auth_failed(conn, ev->status);
3462 }
3463
3464 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3465
3466 if (conn->state == BT_CONFIG) {
3467 if (!ev->status && hci_conn_ssp_enabled(conn)) {
3468 struct hci_cp_set_conn_encrypt cp;
3469 cp.handle = ev->handle;
3470 cp.encrypt = 0x01;
3471 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3472 &cp);
3473 } else {
3474 conn->state = BT_CONNECTED;
3475 hci_connect_cfm(conn, ev->status);
3476 hci_conn_drop(conn);
3477 }
3478 } else {
3479 hci_auth_cfm(conn, ev->status);
3480
3481 hci_conn_hold(conn);
3482 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
3483 hci_conn_drop(conn);
3484 }
3485
3486 if (test_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
3487 if (!ev->status) {
3488 struct hci_cp_set_conn_encrypt cp;
3489 cp.handle = ev->handle;
3490 cp.encrypt = 0x01;
3491 hci_send_cmd(hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
3492 &cp);
3493 } else {
3494 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3495 hci_encrypt_cfm(conn, ev->status);
3496 }
3497 }
3498
3499 unlock:
3500 hci_dev_unlock(hdev);
3501 }
3502
hci_remote_name_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3503 static void hci_remote_name_evt(struct hci_dev *hdev, void *data,
3504 struct sk_buff *skb)
3505 {
3506 struct hci_ev_remote_name *ev = data;
3507 struct hci_conn *conn;
3508
3509 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3510
3511 hci_dev_lock(hdev);
3512
3513 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
3514
3515 if (!hci_dev_test_flag(hdev, HCI_MGMT))
3516 goto check_auth;
3517
3518 if (ev->status == 0)
3519 hci_check_pending_name(hdev, conn, &ev->bdaddr, ev->name,
3520 strnlen(ev->name, HCI_MAX_NAME_LENGTH));
3521 else
3522 hci_check_pending_name(hdev, conn, &ev->bdaddr, NULL, 0);
3523
3524 check_auth:
3525 if (!conn)
3526 goto unlock;
3527
3528 if (!hci_outgoing_auth_needed(hdev, conn))
3529 goto unlock;
3530
3531 if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
3532 struct hci_cp_auth_requested cp;
3533
3534 set_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags);
3535
3536 cp.handle = __cpu_to_le16(conn->handle);
3537 hci_send_cmd(hdev, HCI_OP_AUTH_REQUESTED, sizeof(cp), &cp);
3538 }
3539
3540 unlock:
3541 hci_dev_unlock(hdev);
3542 }
3543
hci_encrypt_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3544 static void hci_encrypt_change_evt(struct hci_dev *hdev, void *data,
3545 struct sk_buff *skb)
3546 {
3547 struct hci_ev_encrypt_change *ev = data;
3548 struct hci_conn *conn;
3549
3550 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3551
3552 hci_dev_lock(hdev);
3553
3554 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3555 if (!conn)
3556 goto unlock;
3557
3558 if (!ev->status) {
3559 if (ev->encrypt) {
3560 /* Encryption implies authentication */
3561 set_bit(HCI_CONN_AUTH, &conn->flags);
3562 set_bit(HCI_CONN_ENCRYPT, &conn->flags);
3563 conn->sec_level = conn->pending_sec_level;
3564
3565 /* P-256 authentication key implies FIPS */
3566 if (conn->key_type == HCI_LK_AUTH_COMBINATION_P256)
3567 set_bit(HCI_CONN_FIPS, &conn->flags);
3568
3569 if ((conn->type == ACL_LINK && ev->encrypt == 0x02) ||
3570 conn->type == LE_LINK)
3571 set_bit(HCI_CONN_AES_CCM, &conn->flags);
3572 } else {
3573 clear_bit(HCI_CONN_ENCRYPT, &conn->flags);
3574 clear_bit(HCI_CONN_AES_CCM, &conn->flags);
3575 }
3576 }
3577
3578 /* We should disregard the current RPA and generate a new one
3579 * whenever the encryption procedure fails.
3580 */
3581 if (ev->status && conn->type == LE_LINK) {
3582 hci_dev_set_flag(hdev, HCI_RPA_EXPIRED);
3583 hci_adv_instances_set_rpa_expired(hdev, true);
3584 }
3585
3586 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
3587
3588 /* Check link security requirements are met */
3589 if (!hci_conn_check_link_mode(conn))
3590 ev->status = HCI_ERROR_AUTH_FAILURE;
3591
3592 if (ev->status && conn->state == BT_CONNECTED) {
3593 if (ev->status == HCI_ERROR_PIN_OR_KEY_MISSING)
3594 set_bit(HCI_CONN_AUTH_FAILURE, &conn->flags);
3595
3596 /* Notify upper layers so they can cleanup before
3597 * disconnecting.
3598 */
3599 hci_encrypt_cfm(conn, ev->status);
3600 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
3601 hci_conn_drop(conn);
3602 goto unlock;
3603 }
3604
3605 /* Try reading the encryption key size for encrypted ACL links */
3606 if (!ev->status && ev->encrypt && conn->type == ACL_LINK) {
3607 struct hci_cp_read_enc_key_size cp;
3608
3609 /* Only send HCI_Read_Encryption_Key_Size if the
3610 * controller really supports it. If it doesn't, assume
3611 * the default size (16).
3612 */
3613 if (!read_key_size_capable(hdev)) {
3614 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3615 goto notify;
3616 }
3617
3618 cp.handle = cpu_to_le16(conn->handle);
3619 if (hci_send_cmd(hdev, HCI_OP_READ_ENC_KEY_SIZE,
3620 sizeof(cp), &cp)) {
3621 bt_dev_err(hdev, "sending read key size failed");
3622 conn->enc_key_size = HCI_LINK_KEY_SIZE;
3623 goto notify;
3624 }
3625
3626 goto unlock;
3627 }
3628
3629 /* Set the default Authenticated Payload Timeout after
3630 * an LE Link is established. As per Core Spec v5.0, Vol 2, Part B
3631 * Section 3.3, the HCI command WRITE_AUTH_PAYLOAD_TIMEOUT should be
3632 * sent when the link is active and Encryption is enabled, the conn
3633 * type can be either LE or ACL and controller must support LMP Ping.
3634 * Ensure for AES-CCM encryption as well.
3635 */
3636 if (test_bit(HCI_CONN_ENCRYPT, &conn->flags) &&
3637 test_bit(HCI_CONN_AES_CCM, &conn->flags) &&
3638 ((conn->type == ACL_LINK && lmp_ping_capable(hdev)) ||
3639 (conn->type == LE_LINK && (hdev->le_features[0] & HCI_LE_PING)))) {
3640 struct hci_cp_write_auth_payload_to cp;
3641
3642 cp.handle = cpu_to_le16(conn->handle);
3643 cp.timeout = cpu_to_le16(hdev->auth_payload_timeout);
3644 if (hci_send_cmd(conn->hdev, HCI_OP_WRITE_AUTH_PAYLOAD_TO,
3645 sizeof(cp), &cp))
3646 bt_dev_err(hdev, "write auth payload timeout failed");
3647 }
3648
3649 notify:
3650 hci_encrypt_cfm(conn, ev->status);
3651
3652 unlock:
3653 hci_dev_unlock(hdev);
3654 }
3655
hci_change_link_key_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3656 static void hci_change_link_key_complete_evt(struct hci_dev *hdev, void *data,
3657 struct sk_buff *skb)
3658 {
3659 struct hci_ev_change_link_key_complete *ev = data;
3660 struct hci_conn *conn;
3661
3662 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3663
3664 hci_dev_lock(hdev);
3665
3666 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3667 if (conn) {
3668 if (!ev->status)
3669 set_bit(HCI_CONN_SECURE, &conn->flags);
3670
3671 clear_bit(HCI_CONN_AUTH_PEND, &conn->flags);
3672
3673 hci_key_change_cfm(conn, ev->status);
3674 }
3675
3676 hci_dev_unlock(hdev);
3677 }
3678
hci_remote_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)3679 static void hci_remote_features_evt(struct hci_dev *hdev, void *data,
3680 struct sk_buff *skb)
3681 {
3682 struct hci_ev_remote_features *ev = data;
3683 struct hci_conn *conn;
3684
3685 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
3686
3687 hci_dev_lock(hdev);
3688
3689 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
3690 if (!conn)
3691 goto unlock;
3692
3693 if (!ev->status)
3694 memcpy(conn->features[0], ev->features, 8);
3695
3696 if (conn->state != BT_CONFIG)
3697 goto unlock;
3698
3699 if (!ev->status && lmp_ext_feat_capable(hdev) &&
3700 lmp_ext_feat_capable(conn)) {
3701 struct hci_cp_read_remote_ext_features cp;
3702 cp.handle = ev->handle;
3703 cp.page = 0x01;
3704 hci_send_cmd(hdev, HCI_OP_READ_REMOTE_EXT_FEATURES,
3705 sizeof(cp), &cp);
3706 goto unlock;
3707 }
3708
3709 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
3710 struct hci_cp_remote_name_req cp;
3711 memset(&cp, 0, sizeof(cp));
3712 bacpy(&cp.bdaddr, &conn->dst);
3713 cp.pscan_rep_mode = 0x02;
3714 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
3715 } else {
3716 mgmt_device_connected(hdev, conn, NULL, 0);
3717 }
3718
3719 if (!hci_outgoing_auth_needed(hdev, conn)) {
3720 conn->state = BT_CONNECTED;
3721 hci_connect_cfm(conn, ev->status);
3722 hci_conn_drop(conn);
3723 }
3724
3725 unlock:
3726 hci_dev_unlock(hdev);
3727 }
3728
handle_cmd_cnt_and_timer(struct hci_dev * hdev,u8 ncmd)3729 static inline void handle_cmd_cnt_and_timer(struct hci_dev *hdev, u8 ncmd)
3730 {
3731 cancel_delayed_work(&hdev->cmd_timer);
3732
3733 rcu_read_lock();
3734 if (!test_bit(HCI_RESET, &hdev->flags)) {
3735 if (ncmd) {
3736 cancel_delayed_work(&hdev->ncmd_timer);
3737 atomic_set(&hdev->cmd_cnt, 1);
3738 } else {
3739 if (!hci_dev_test_flag(hdev, HCI_CMD_DRAIN_WORKQUEUE))
3740 queue_delayed_work(hdev->workqueue, &hdev->ncmd_timer,
3741 HCI_NCMD_TIMEOUT);
3742 }
3743 }
3744 rcu_read_unlock();
3745 }
3746
hci_cc_le_read_buffer_size_v2(struct hci_dev * hdev,void * data,struct sk_buff * skb)3747 static u8 hci_cc_le_read_buffer_size_v2(struct hci_dev *hdev, void *data,
3748 struct sk_buff *skb)
3749 {
3750 struct hci_rp_le_read_buffer_size_v2 *rp = data;
3751
3752 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3753
3754 if (rp->status)
3755 return rp->status;
3756
3757 hdev->le_mtu = __le16_to_cpu(rp->acl_mtu);
3758 hdev->le_pkts = rp->acl_max_pkt;
3759 hdev->iso_mtu = __le16_to_cpu(rp->iso_mtu);
3760 hdev->iso_pkts = rp->iso_max_pkt;
3761
3762 hdev->le_cnt = hdev->le_pkts;
3763 hdev->iso_cnt = hdev->iso_pkts;
3764
3765 BT_DBG("%s acl mtu %d:%d iso mtu %d:%d", hdev->name, hdev->acl_mtu,
3766 hdev->acl_pkts, hdev->iso_mtu, hdev->iso_pkts);
3767
3768 if (hdev->le_mtu && hdev->le_mtu < HCI_MIN_LE_MTU)
3769 return HCI_ERROR_INVALID_PARAMETERS;
3770
3771 return rp->status;
3772 }
3773
hci_unbound_cis_failed(struct hci_dev * hdev,u8 cig,u8 status)3774 static void hci_unbound_cis_failed(struct hci_dev *hdev, u8 cig, u8 status)
3775 {
3776 struct hci_conn *conn, *tmp;
3777
3778 lockdep_assert_held(&hdev->lock);
3779
3780 list_for_each_entry_safe(conn, tmp, &hdev->conn_hash.list, list) {
3781 if (conn->type != ISO_LINK || !bacmp(&conn->dst, BDADDR_ANY) ||
3782 conn->state == BT_OPEN || conn->iso_qos.ucast.cig != cig)
3783 continue;
3784
3785 if (HCI_CONN_HANDLE_UNSET(conn->handle))
3786 hci_conn_failed(conn, status);
3787 }
3788 }
3789
hci_cc_le_set_cig_params(struct hci_dev * hdev,void * data,struct sk_buff * skb)3790 static u8 hci_cc_le_set_cig_params(struct hci_dev *hdev, void *data,
3791 struct sk_buff *skb)
3792 {
3793 struct hci_rp_le_set_cig_params *rp = data;
3794 struct hci_cp_le_set_cig_params *cp;
3795 struct hci_conn *conn;
3796 u8 status = rp->status;
3797 bool pending = false;
3798 int i;
3799
3800 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3801
3802 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_CIG_PARAMS);
3803 if (!rp->status && (!cp || rp->num_handles != cp->num_cis ||
3804 rp->cig_id != cp->cig_id)) {
3805 bt_dev_err(hdev, "unexpected Set CIG Parameters response data");
3806 status = HCI_ERROR_UNSPECIFIED;
3807 }
3808
3809 hci_dev_lock(hdev);
3810
3811 /* BLUETOOTH CORE SPECIFICATION Version 5.4 | Vol 4, Part E page 2554
3812 *
3813 * If the Status return parameter is non-zero, then the state of the CIG
3814 * and its CIS configurations shall not be changed by the command. If
3815 * the CIG did not already exist, it shall not be created.
3816 */
3817 if (status) {
3818 /* Keep current configuration, fail only the unbound CIS */
3819 hci_unbound_cis_failed(hdev, rp->cig_id, status);
3820 goto unlock;
3821 }
3822
3823 /* BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 4, Part E page 2553
3824 *
3825 * If the Status return parameter is zero, then the Controller shall
3826 * set the Connection_Handle arrayed return parameter to the connection
3827 * handle(s) corresponding to the CIS configurations specified in
3828 * the CIS_IDs command parameter, in the same order.
3829 */
3830 for (i = 0; i < rp->num_handles; ++i) {
3831 conn = hci_conn_hash_lookup_cis(hdev, NULL, 0, rp->cig_id,
3832 cp->cis[i].cis_id);
3833 if (!conn || !bacmp(&conn->dst, BDADDR_ANY))
3834 continue;
3835
3836 if (conn->state != BT_BOUND && conn->state != BT_CONNECT)
3837 continue;
3838
3839 if (hci_conn_set_handle(conn, __le16_to_cpu(rp->handle[i])))
3840 continue;
3841
3842 if (conn->state == BT_CONNECT)
3843 pending = true;
3844 }
3845
3846 unlock:
3847 if (pending)
3848 hci_le_create_cis_pending(hdev);
3849
3850 hci_dev_unlock(hdev);
3851
3852 return rp->status;
3853 }
3854
hci_cc_le_setup_iso_path(struct hci_dev * hdev,void * data,struct sk_buff * skb)3855 static u8 hci_cc_le_setup_iso_path(struct hci_dev *hdev, void *data,
3856 struct sk_buff *skb)
3857 {
3858 struct hci_rp_le_setup_iso_path *rp = data;
3859 struct hci_cp_le_setup_iso_path *cp;
3860 struct hci_conn *conn;
3861
3862 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3863
3864 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SETUP_ISO_PATH);
3865 if (!cp)
3866 return rp->status;
3867
3868 hci_dev_lock(hdev);
3869
3870 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(cp->handle));
3871 if (!conn)
3872 goto unlock;
3873
3874 if (rp->status) {
3875 hci_connect_cfm(conn, rp->status);
3876 hci_conn_del(conn);
3877 goto unlock;
3878 }
3879
3880 switch (cp->direction) {
3881 /* Input (Host to Controller) */
3882 case 0x00:
3883 /* Only confirm connection if output only */
3884 if (conn->iso_qos.ucast.out.sdu && !conn->iso_qos.ucast.in.sdu)
3885 hci_connect_cfm(conn, rp->status);
3886 break;
3887 /* Output (Controller to Host) */
3888 case 0x01:
3889 /* Confirm connection since conn->iso_qos is always configured
3890 * last.
3891 */
3892 hci_connect_cfm(conn, rp->status);
3893
3894 /* Notify device connected in case it is a BIG Sync */
3895 if (!rp->status && test_bit(HCI_CONN_BIG_SYNC, &conn->flags))
3896 mgmt_device_connected(hdev, conn, NULL, 0);
3897
3898 break;
3899 }
3900
3901 unlock:
3902 hci_dev_unlock(hdev);
3903 return rp->status;
3904 }
3905
hci_cs_le_create_big(struct hci_dev * hdev,u8 status)3906 static void hci_cs_le_create_big(struct hci_dev *hdev, u8 status)
3907 {
3908 bt_dev_dbg(hdev, "status 0x%2.2x", status);
3909 }
3910
hci_cc_set_per_adv_param(struct hci_dev * hdev,void * data,struct sk_buff * skb)3911 static u8 hci_cc_set_per_adv_param(struct hci_dev *hdev, void *data,
3912 struct sk_buff *skb)
3913 {
3914 struct hci_ev_status *rp = data;
3915 struct hci_cp_le_set_per_adv_params *cp;
3916
3917 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3918
3919 if (rp->status)
3920 return rp->status;
3921
3922 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_PARAMS);
3923 if (!cp)
3924 return rp->status;
3925
3926 /* TODO: set the conn state */
3927 return rp->status;
3928 }
3929
hci_cc_le_set_per_adv_enable(struct hci_dev * hdev,void * data,struct sk_buff * skb)3930 static u8 hci_cc_le_set_per_adv_enable(struct hci_dev *hdev, void *data,
3931 struct sk_buff *skb)
3932 {
3933 struct hci_ev_status *rp = data;
3934 struct hci_cp_le_set_per_adv_enable *cp;
3935 struct adv_info *adv = NULL, *n;
3936 u8 per_adv_cnt = 0;
3937
3938 bt_dev_dbg(hdev, "status 0x%2.2x", rp->status);
3939
3940 if (rp->status)
3941 return rp->status;
3942
3943 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_SET_PER_ADV_ENABLE);
3944 if (!cp)
3945 return rp->status;
3946
3947 hci_dev_lock(hdev);
3948
3949 adv = hci_find_adv_instance(hdev, cp->handle);
3950
3951 if (cp->enable) {
3952 hci_dev_set_flag(hdev, HCI_LE_PER_ADV);
3953
3954 if (adv)
3955 adv->enabled = true;
3956 } else {
3957 /* If just one instance was disabled check if there are
3958 * any other instance enabled before clearing HCI_LE_PER_ADV.
3959 * The current periodic adv instance will be marked as
3960 * disabled once extended advertising is also disabled.
3961 */
3962 list_for_each_entry_safe(adv, n, &hdev->adv_instances,
3963 list) {
3964 if (adv->periodic && adv->enabled)
3965 per_adv_cnt++;
3966 }
3967
3968 if (per_adv_cnt > 1)
3969 goto unlock;
3970
3971 hci_dev_clear_flag(hdev, HCI_LE_PER_ADV);
3972 }
3973
3974 unlock:
3975 hci_dev_unlock(hdev);
3976
3977 return rp->status;
3978 }
3979
3980 #define HCI_CC_VL(_op, _func, _min, _max) \
3981 { \
3982 .op = _op, \
3983 .func = _func, \
3984 .min_len = _min, \
3985 .max_len = _max, \
3986 }
3987
3988 #define HCI_CC(_op, _func, _len) \
3989 HCI_CC_VL(_op, _func, _len, _len)
3990
3991 #define HCI_CC_STATUS(_op, _func) \
3992 HCI_CC(_op, _func, sizeof(struct hci_ev_status))
3993
3994 static const struct hci_cc {
3995 u16 op;
3996 u8 (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
3997 u16 min_len;
3998 u16 max_len;
3999 } hci_cc_table[] = {
4000 HCI_CC_STATUS(HCI_OP_INQUIRY_CANCEL, hci_cc_inquiry_cancel),
4001 HCI_CC_STATUS(HCI_OP_PERIODIC_INQ, hci_cc_periodic_inq),
4002 HCI_CC_STATUS(HCI_OP_EXIT_PERIODIC_INQ, hci_cc_exit_periodic_inq),
4003 HCI_CC_STATUS(HCI_OP_REMOTE_NAME_REQ_CANCEL,
4004 hci_cc_remote_name_req_cancel),
4005 HCI_CC(HCI_OP_ROLE_DISCOVERY, hci_cc_role_discovery,
4006 sizeof(struct hci_rp_role_discovery)),
4007 HCI_CC(HCI_OP_READ_LINK_POLICY, hci_cc_read_link_policy,
4008 sizeof(struct hci_rp_read_link_policy)),
4009 HCI_CC(HCI_OP_WRITE_LINK_POLICY, hci_cc_write_link_policy,
4010 sizeof(struct hci_rp_write_link_policy)),
4011 HCI_CC(HCI_OP_READ_DEF_LINK_POLICY, hci_cc_read_def_link_policy,
4012 sizeof(struct hci_rp_read_def_link_policy)),
4013 HCI_CC_STATUS(HCI_OP_WRITE_DEF_LINK_POLICY,
4014 hci_cc_write_def_link_policy),
4015 HCI_CC_STATUS(HCI_OP_RESET, hci_cc_reset),
4016 HCI_CC(HCI_OP_READ_STORED_LINK_KEY, hci_cc_read_stored_link_key,
4017 sizeof(struct hci_rp_read_stored_link_key)),
4018 HCI_CC(HCI_OP_DELETE_STORED_LINK_KEY, hci_cc_delete_stored_link_key,
4019 sizeof(struct hci_rp_delete_stored_link_key)),
4020 HCI_CC_STATUS(HCI_OP_WRITE_LOCAL_NAME, hci_cc_write_local_name),
4021 HCI_CC(HCI_OP_READ_LOCAL_NAME, hci_cc_read_local_name,
4022 sizeof(struct hci_rp_read_local_name)),
4023 HCI_CC_STATUS(HCI_OP_WRITE_AUTH_ENABLE, hci_cc_write_auth_enable),
4024 HCI_CC_STATUS(HCI_OP_WRITE_ENCRYPT_MODE, hci_cc_write_encrypt_mode),
4025 HCI_CC_STATUS(HCI_OP_WRITE_SCAN_ENABLE, hci_cc_write_scan_enable),
4026 HCI_CC_STATUS(HCI_OP_SET_EVENT_FLT, hci_cc_set_event_filter),
4027 HCI_CC(HCI_OP_READ_CLASS_OF_DEV, hci_cc_read_class_of_dev,
4028 sizeof(struct hci_rp_read_class_of_dev)),
4029 HCI_CC_STATUS(HCI_OP_WRITE_CLASS_OF_DEV, hci_cc_write_class_of_dev),
4030 HCI_CC(HCI_OP_READ_VOICE_SETTING, hci_cc_read_voice_setting,
4031 sizeof(struct hci_rp_read_voice_setting)),
4032 HCI_CC_STATUS(HCI_OP_WRITE_VOICE_SETTING, hci_cc_write_voice_setting),
4033 HCI_CC(HCI_OP_READ_NUM_SUPPORTED_IAC, hci_cc_read_num_supported_iac,
4034 sizeof(struct hci_rp_read_num_supported_iac)),
4035 HCI_CC_STATUS(HCI_OP_WRITE_SSP_MODE, hci_cc_write_ssp_mode),
4036 HCI_CC_STATUS(HCI_OP_WRITE_SC_SUPPORT, hci_cc_write_sc_support),
4037 HCI_CC(HCI_OP_READ_AUTH_PAYLOAD_TO, hci_cc_read_auth_payload_timeout,
4038 sizeof(struct hci_rp_read_auth_payload_to)),
4039 HCI_CC(HCI_OP_WRITE_AUTH_PAYLOAD_TO, hci_cc_write_auth_payload_timeout,
4040 sizeof(struct hci_rp_write_auth_payload_to)),
4041 HCI_CC(HCI_OP_READ_LOCAL_VERSION, hci_cc_read_local_version,
4042 sizeof(struct hci_rp_read_local_version)),
4043 HCI_CC(HCI_OP_READ_LOCAL_COMMANDS, hci_cc_read_local_commands,
4044 sizeof(struct hci_rp_read_local_commands)),
4045 HCI_CC(HCI_OP_READ_LOCAL_FEATURES, hci_cc_read_local_features,
4046 sizeof(struct hci_rp_read_local_features)),
4047 HCI_CC(HCI_OP_READ_LOCAL_EXT_FEATURES, hci_cc_read_local_ext_features,
4048 sizeof(struct hci_rp_read_local_ext_features)),
4049 HCI_CC(HCI_OP_READ_BUFFER_SIZE, hci_cc_read_buffer_size,
4050 sizeof(struct hci_rp_read_buffer_size)),
4051 HCI_CC(HCI_OP_READ_BD_ADDR, hci_cc_read_bd_addr,
4052 sizeof(struct hci_rp_read_bd_addr)),
4053 HCI_CC(HCI_OP_READ_LOCAL_PAIRING_OPTS, hci_cc_read_local_pairing_opts,
4054 sizeof(struct hci_rp_read_local_pairing_opts)),
4055 HCI_CC(HCI_OP_READ_PAGE_SCAN_ACTIVITY, hci_cc_read_page_scan_activity,
4056 sizeof(struct hci_rp_read_page_scan_activity)),
4057 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_ACTIVITY,
4058 hci_cc_write_page_scan_activity),
4059 HCI_CC(HCI_OP_READ_PAGE_SCAN_TYPE, hci_cc_read_page_scan_type,
4060 sizeof(struct hci_rp_read_page_scan_type)),
4061 HCI_CC_STATUS(HCI_OP_WRITE_PAGE_SCAN_TYPE, hci_cc_write_page_scan_type),
4062 HCI_CC(HCI_OP_READ_CLOCK, hci_cc_read_clock,
4063 sizeof(struct hci_rp_read_clock)),
4064 HCI_CC(HCI_OP_READ_ENC_KEY_SIZE, hci_cc_read_enc_key_size,
4065 sizeof(struct hci_rp_read_enc_key_size)),
4066 HCI_CC(HCI_OP_READ_INQ_RSP_TX_POWER, hci_cc_read_inq_rsp_tx_power,
4067 sizeof(struct hci_rp_read_inq_rsp_tx_power)),
4068 HCI_CC(HCI_OP_READ_DEF_ERR_DATA_REPORTING,
4069 hci_cc_read_def_err_data_reporting,
4070 sizeof(struct hci_rp_read_def_err_data_reporting)),
4071 HCI_CC_STATUS(HCI_OP_WRITE_DEF_ERR_DATA_REPORTING,
4072 hci_cc_write_def_err_data_reporting),
4073 HCI_CC(HCI_OP_PIN_CODE_REPLY, hci_cc_pin_code_reply,
4074 sizeof(struct hci_rp_pin_code_reply)),
4075 HCI_CC(HCI_OP_PIN_CODE_NEG_REPLY, hci_cc_pin_code_neg_reply,
4076 sizeof(struct hci_rp_pin_code_neg_reply)),
4077 HCI_CC(HCI_OP_READ_LOCAL_OOB_DATA, hci_cc_read_local_oob_data,
4078 sizeof(struct hci_rp_read_local_oob_data)),
4079 HCI_CC(HCI_OP_READ_LOCAL_OOB_EXT_DATA, hci_cc_read_local_oob_ext_data,
4080 sizeof(struct hci_rp_read_local_oob_ext_data)),
4081 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE, hci_cc_le_read_buffer_size,
4082 sizeof(struct hci_rp_le_read_buffer_size)),
4083 HCI_CC(HCI_OP_LE_READ_LOCAL_FEATURES, hci_cc_le_read_local_features,
4084 sizeof(struct hci_rp_le_read_local_features)),
4085 HCI_CC(HCI_OP_LE_READ_ADV_TX_POWER, hci_cc_le_read_adv_tx_power,
4086 sizeof(struct hci_rp_le_read_adv_tx_power)),
4087 HCI_CC(HCI_OP_USER_CONFIRM_REPLY, hci_cc_user_confirm_reply,
4088 sizeof(struct hci_rp_user_confirm_reply)),
4089 HCI_CC(HCI_OP_USER_CONFIRM_NEG_REPLY, hci_cc_user_confirm_neg_reply,
4090 sizeof(struct hci_rp_user_confirm_reply)),
4091 HCI_CC(HCI_OP_USER_PASSKEY_REPLY, hci_cc_user_passkey_reply,
4092 sizeof(struct hci_rp_user_confirm_reply)),
4093 HCI_CC(HCI_OP_USER_PASSKEY_NEG_REPLY, hci_cc_user_passkey_neg_reply,
4094 sizeof(struct hci_rp_user_confirm_reply)),
4095 HCI_CC_STATUS(HCI_OP_LE_SET_RANDOM_ADDR, hci_cc_le_set_random_addr),
4096 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_ENABLE, hci_cc_le_set_adv_enable),
4097 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_PARAM, hci_cc_le_set_scan_param),
4098 HCI_CC_STATUS(HCI_OP_LE_SET_SCAN_ENABLE, hci_cc_le_set_scan_enable),
4099 HCI_CC(HCI_OP_LE_READ_ACCEPT_LIST_SIZE,
4100 hci_cc_le_read_accept_list_size,
4101 sizeof(struct hci_rp_le_read_accept_list_size)),
4102 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ACCEPT_LIST, hci_cc_le_clear_accept_list),
4103 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_ACCEPT_LIST,
4104 hci_cc_le_add_to_accept_list),
4105 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_ACCEPT_LIST,
4106 hci_cc_le_del_from_accept_list),
4107 HCI_CC(HCI_OP_LE_READ_SUPPORTED_STATES, hci_cc_le_read_supported_states,
4108 sizeof(struct hci_rp_le_read_supported_states)),
4109 HCI_CC(HCI_OP_LE_READ_DEF_DATA_LEN, hci_cc_le_read_def_data_len,
4110 sizeof(struct hci_rp_le_read_def_data_len)),
4111 HCI_CC_STATUS(HCI_OP_LE_WRITE_DEF_DATA_LEN,
4112 hci_cc_le_write_def_data_len),
4113 HCI_CC_STATUS(HCI_OP_LE_ADD_TO_RESOLV_LIST,
4114 hci_cc_le_add_to_resolv_list),
4115 HCI_CC_STATUS(HCI_OP_LE_DEL_FROM_RESOLV_LIST,
4116 hci_cc_le_del_from_resolv_list),
4117 HCI_CC_STATUS(HCI_OP_LE_CLEAR_RESOLV_LIST,
4118 hci_cc_le_clear_resolv_list),
4119 HCI_CC(HCI_OP_LE_READ_RESOLV_LIST_SIZE, hci_cc_le_read_resolv_list_size,
4120 sizeof(struct hci_rp_le_read_resolv_list_size)),
4121 HCI_CC_STATUS(HCI_OP_LE_SET_ADDR_RESOLV_ENABLE,
4122 hci_cc_le_set_addr_resolution_enable),
4123 HCI_CC(HCI_OP_LE_READ_MAX_DATA_LEN, hci_cc_le_read_max_data_len,
4124 sizeof(struct hci_rp_le_read_max_data_len)),
4125 HCI_CC_STATUS(HCI_OP_WRITE_LE_HOST_SUPPORTED,
4126 hci_cc_write_le_host_supported),
4127 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_PARAM, hci_cc_set_adv_param),
4128 HCI_CC(HCI_OP_READ_RSSI, hci_cc_read_rssi,
4129 sizeof(struct hci_rp_read_rssi)),
4130 HCI_CC(HCI_OP_READ_TX_POWER, hci_cc_read_tx_power,
4131 sizeof(struct hci_rp_read_tx_power)),
4132 HCI_CC_STATUS(HCI_OP_WRITE_SSP_DEBUG_MODE, hci_cc_write_ssp_debug_mode),
4133 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_PARAMS,
4134 hci_cc_le_set_ext_scan_param),
4135 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_SCAN_ENABLE,
4136 hci_cc_le_set_ext_scan_enable),
4137 HCI_CC_STATUS(HCI_OP_LE_SET_DEFAULT_PHY, hci_cc_le_set_default_phy),
4138 HCI_CC(HCI_OP_LE_READ_NUM_SUPPORTED_ADV_SETS,
4139 hci_cc_le_read_num_adv_sets,
4140 sizeof(struct hci_rp_le_read_num_supported_adv_sets)),
4141 HCI_CC(HCI_OP_LE_SET_EXT_ADV_PARAMS, hci_cc_set_ext_adv_param,
4142 sizeof(struct hci_rp_le_set_ext_adv_params)),
4143 HCI_CC_STATUS(HCI_OP_LE_SET_EXT_ADV_ENABLE,
4144 hci_cc_le_set_ext_adv_enable),
4145 HCI_CC_STATUS(HCI_OP_LE_SET_ADV_SET_RAND_ADDR,
4146 hci_cc_le_set_adv_set_random_addr),
4147 HCI_CC_STATUS(HCI_OP_LE_REMOVE_ADV_SET, hci_cc_le_remove_adv_set),
4148 HCI_CC_STATUS(HCI_OP_LE_CLEAR_ADV_SETS, hci_cc_le_clear_adv_sets),
4149 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_PARAMS, hci_cc_set_per_adv_param),
4150 HCI_CC_STATUS(HCI_OP_LE_SET_PER_ADV_ENABLE,
4151 hci_cc_le_set_per_adv_enable),
4152 HCI_CC(HCI_OP_LE_READ_TRANSMIT_POWER, hci_cc_le_read_transmit_power,
4153 sizeof(struct hci_rp_le_read_transmit_power)),
4154 HCI_CC_STATUS(HCI_OP_LE_SET_PRIVACY_MODE, hci_cc_le_set_privacy_mode),
4155 HCI_CC(HCI_OP_LE_READ_BUFFER_SIZE_V2, hci_cc_le_read_buffer_size_v2,
4156 sizeof(struct hci_rp_le_read_buffer_size_v2)),
4157 HCI_CC_VL(HCI_OP_LE_SET_CIG_PARAMS, hci_cc_le_set_cig_params,
4158 sizeof(struct hci_rp_le_set_cig_params), HCI_MAX_EVENT_SIZE),
4159 HCI_CC(HCI_OP_LE_SETUP_ISO_PATH, hci_cc_le_setup_iso_path,
4160 sizeof(struct hci_rp_le_setup_iso_path)),
4161 };
4162
hci_cc_func(struct hci_dev * hdev,const struct hci_cc * cc,struct sk_buff * skb)4163 static u8 hci_cc_func(struct hci_dev *hdev, const struct hci_cc *cc,
4164 struct sk_buff *skb)
4165 {
4166 void *data;
4167
4168 if (skb->len < cc->min_len) {
4169 bt_dev_err(hdev, "unexpected cc 0x%4.4x length: %u < %u",
4170 cc->op, skb->len, cc->min_len);
4171 return HCI_ERROR_UNSPECIFIED;
4172 }
4173
4174 /* Just warn if the length is over max_len size it still be possible to
4175 * partially parse the cc so leave to callback to decide if that is
4176 * acceptable.
4177 */
4178 if (skb->len > cc->max_len)
4179 bt_dev_warn(hdev, "unexpected cc 0x%4.4x length: %u > %u",
4180 cc->op, skb->len, cc->max_len);
4181
4182 data = hci_cc_skb_pull(hdev, skb, cc->op, cc->min_len);
4183 if (!data)
4184 return HCI_ERROR_UNSPECIFIED;
4185
4186 return cc->func(hdev, data, skb);
4187 }
4188
hci_cmd_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb,u16 * opcode,u8 * status,hci_req_complete_t * req_complete,hci_req_complete_skb_t * req_complete_skb)4189 static void hci_cmd_complete_evt(struct hci_dev *hdev, void *data,
4190 struct sk_buff *skb, u16 *opcode, u8 *status,
4191 hci_req_complete_t *req_complete,
4192 hci_req_complete_skb_t *req_complete_skb)
4193 {
4194 struct hci_ev_cmd_complete *ev = data;
4195 int i;
4196
4197 *opcode = __le16_to_cpu(ev->opcode);
4198
4199 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4200
4201 for (i = 0; i < ARRAY_SIZE(hci_cc_table); i++) {
4202 if (hci_cc_table[i].op == *opcode) {
4203 *status = hci_cc_func(hdev, &hci_cc_table[i], skb);
4204 break;
4205 }
4206 }
4207
4208 if (i == ARRAY_SIZE(hci_cc_table)) {
4209 /* Unknown opcode, assume byte 0 contains the status, so
4210 * that e.g. __hci_cmd_sync() properly returns errors
4211 * for vendor specific commands send by HCI drivers.
4212 * If a vendor doesn't actually follow this convention we may
4213 * need to introduce a vendor CC table in order to properly set
4214 * the status.
4215 */
4216 *status = skb->data[0];
4217 }
4218
4219 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4220
4221 hci_req_cmd_complete(hdev, *opcode, *status, req_complete,
4222 req_complete_skb);
4223
4224 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4225 bt_dev_err(hdev,
4226 "unexpected event for opcode 0x%4.4x", *opcode);
4227 return;
4228 }
4229
4230 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4231 queue_work(hdev->workqueue, &hdev->cmd_work);
4232 }
4233
hci_cs_le_create_cis(struct hci_dev * hdev,u8 status)4234 static void hci_cs_le_create_cis(struct hci_dev *hdev, u8 status)
4235 {
4236 struct hci_cp_le_create_cis *cp;
4237 bool pending = false;
4238 int i;
4239
4240 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4241
4242 if (!status)
4243 return;
4244
4245 cp = hci_sent_cmd_data(hdev, HCI_OP_LE_CREATE_CIS);
4246 if (!cp)
4247 return;
4248
4249 hci_dev_lock(hdev);
4250
4251 /* Remove connection if command failed */
4252 for (i = 0; i < cp->num_cis; i++) {
4253 struct hci_conn *conn;
4254 u16 handle;
4255
4256 handle = __le16_to_cpu(cp->cis[i].cis_handle);
4257
4258 conn = hci_conn_hash_lookup_handle(hdev, handle);
4259 if (conn) {
4260 if (test_and_clear_bit(HCI_CONN_CREATE_CIS,
4261 &conn->flags))
4262 pending = true;
4263 conn->state = BT_CLOSED;
4264 hci_connect_cfm(conn, status);
4265 hci_conn_del(conn);
4266 }
4267 }
4268 cp->num_cis = 0;
4269
4270 if (pending)
4271 hci_le_create_cis_pending(hdev);
4272
4273 hci_dev_unlock(hdev);
4274 }
4275
4276 #define HCI_CS(_op, _func) \
4277 { \
4278 .op = _op, \
4279 .func = _func, \
4280 }
4281
4282 static const struct hci_cs {
4283 u16 op;
4284 void (*func)(struct hci_dev *hdev, __u8 status);
4285 } hci_cs_table[] = {
4286 HCI_CS(HCI_OP_INQUIRY, hci_cs_inquiry),
4287 HCI_CS(HCI_OP_CREATE_CONN, hci_cs_create_conn),
4288 HCI_CS(HCI_OP_DISCONNECT, hci_cs_disconnect),
4289 HCI_CS(HCI_OP_ADD_SCO, hci_cs_add_sco),
4290 HCI_CS(HCI_OP_AUTH_REQUESTED, hci_cs_auth_requested),
4291 HCI_CS(HCI_OP_SET_CONN_ENCRYPT, hci_cs_set_conn_encrypt),
4292 HCI_CS(HCI_OP_REMOTE_NAME_REQ, hci_cs_remote_name_req),
4293 HCI_CS(HCI_OP_READ_REMOTE_FEATURES, hci_cs_read_remote_features),
4294 HCI_CS(HCI_OP_READ_REMOTE_EXT_FEATURES,
4295 hci_cs_read_remote_ext_features),
4296 HCI_CS(HCI_OP_SETUP_SYNC_CONN, hci_cs_setup_sync_conn),
4297 HCI_CS(HCI_OP_ENHANCED_SETUP_SYNC_CONN,
4298 hci_cs_enhanced_setup_sync_conn),
4299 HCI_CS(HCI_OP_SNIFF_MODE, hci_cs_sniff_mode),
4300 HCI_CS(HCI_OP_EXIT_SNIFF_MODE, hci_cs_exit_sniff_mode),
4301 HCI_CS(HCI_OP_SWITCH_ROLE, hci_cs_switch_role),
4302 HCI_CS(HCI_OP_LE_CREATE_CONN, hci_cs_le_create_conn),
4303 HCI_CS(HCI_OP_LE_READ_REMOTE_FEATURES, hci_cs_le_read_remote_features),
4304 HCI_CS(HCI_OP_LE_START_ENC, hci_cs_le_start_enc),
4305 HCI_CS(HCI_OP_LE_EXT_CREATE_CONN, hci_cs_le_ext_create_conn),
4306 HCI_CS(HCI_OP_LE_CREATE_CIS, hci_cs_le_create_cis),
4307 HCI_CS(HCI_OP_LE_CREATE_BIG, hci_cs_le_create_big),
4308 };
4309
hci_cmd_status_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb,u16 * opcode,u8 * status,hci_req_complete_t * req_complete,hci_req_complete_skb_t * req_complete_skb)4310 static void hci_cmd_status_evt(struct hci_dev *hdev, void *data,
4311 struct sk_buff *skb, u16 *opcode, u8 *status,
4312 hci_req_complete_t *req_complete,
4313 hci_req_complete_skb_t *req_complete_skb)
4314 {
4315 struct hci_ev_cmd_status *ev = data;
4316 int i;
4317
4318 *opcode = __le16_to_cpu(ev->opcode);
4319 *status = ev->status;
4320
4321 bt_dev_dbg(hdev, "opcode 0x%4.4x", *opcode);
4322
4323 for (i = 0; i < ARRAY_SIZE(hci_cs_table); i++) {
4324 if (hci_cs_table[i].op == *opcode) {
4325 hci_cs_table[i].func(hdev, ev->status);
4326 break;
4327 }
4328 }
4329
4330 handle_cmd_cnt_and_timer(hdev, ev->ncmd);
4331
4332 /* Indicate request completion if the command failed. Also, if
4333 * we're not waiting for a special event and we get a success
4334 * command status we should try to flag the request as completed
4335 * (since for this kind of commands there will not be a command
4336 * complete event).
4337 */
4338 if (ev->status || (hdev->req_skb && !hci_skb_event(hdev->req_skb))) {
4339 hci_req_cmd_complete(hdev, *opcode, ev->status, req_complete,
4340 req_complete_skb);
4341 if (hci_dev_test_flag(hdev, HCI_CMD_PENDING)) {
4342 bt_dev_err(hdev, "unexpected event for opcode 0x%4.4x",
4343 *opcode);
4344 return;
4345 }
4346 }
4347
4348 if (atomic_read(&hdev->cmd_cnt) && !skb_queue_empty(&hdev->cmd_q))
4349 queue_work(hdev->workqueue, &hdev->cmd_work);
4350 }
4351
hci_hardware_error_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4352 static void hci_hardware_error_evt(struct hci_dev *hdev, void *data,
4353 struct sk_buff *skb)
4354 {
4355 struct hci_ev_hardware_error *ev = data;
4356
4357 bt_dev_dbg(hdev, "code 0x%2.2x", ev->code);
4358
4359 hdev->hw_error_code = ev->code;
4360
4361 queue_work(hdev->req_workqueue, &hdev->error_reset);
4362 }
4363
hci_role_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4364 static void hci_role_change_evt(struct hci_dev *hdev, void *data,
4365 struct sk_buff *skb)
4366 {
4367 struct hci_ev_role_change *ev = data;
4368 struct hci_conn *conn;
4369
4370 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4371
4372 hci_dev_lock(hdev);
4373
4374 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4375 if (conn) {
4376 if (!ev->status)
4377 conn->role = ev->role;
4378
4379 clear_bit(HCI_CONN_RSWITCH_PEND, &conn->flags);
4380
4381 hci_role_switch_cfm(conn, ev->status, ev->role);
4382 }
4383
4384 hci_dev_unlock(hdev);
4385 }
4386
hci_num_comp_pkts_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4387 static void hci_num_comp_pkts_evt(struct hci_dev *hdev, void *data,
4388 struct sk_buff *skb)
4389 {
4390 struct hci_ev_num_comp_pkts *ev = data;
4391 int i;
4392
4393 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_NUM_COMP_PKTS,
4394 flex_array_size(ev, handles, ev->num)))
4395 return;
4396
4397 bt_dev_dbg(hdev, "num %d", ev->num);
4398
4399 for (i = 0; i < ev->num; i++) {
4400 struct hci_comp_pkts_info *info = &ev->handles[i];
4401 struct hci_conn *conn;
4402 __u16 handle, count;
4403
4404 handle = __le16_to_cpu(info->handle);
4405 count = __le16_to_cpu(info->count);
4406
4407 conn = hci_conn_hash_lookup_handle(hdev, handle);
4408 if (!conn)
4409 continue;
4410
4411 conn->sent -= count;
4412
4413 switch (conn->type) {
4414 case ACL_LINK:
4415 hdev->acl_cnt += count;
4416 if (hdev->acl_cnt > hdev->acl_pkts)
4417 hdev->acl_cnt = hdev->acl_pkts;
4418 break;
4419
4420 case LE_LINK:
4421 if (hdev->le_pkts) {
4422 hdev->le_cnt += count;
4423 if (hdev->le_cnt > hdev->le_pkts)
4424 hdev->le_cnt = hdev->le_pkts;
4425 } else {
4426 hdev->acl_cnt += count;
4427 if (hdev->acl_cnt > hdev->acl_pkts)
4428 hdev->acl_cnt = hdev->acl_pkts;
4429 }
4430 break;
4431
4432 case SCO_LINK:
4433 hdev->sco_cnt += count;
4434 if (hdev->sco_cnt > hdev->sco_pkts)
4435 hdev->sco_cnt = hdev->sco_pkts;
4436 break;
4437
4438 case ISO_LINK:
4439 if (hdev->iso_pkts) {
4440 hdev->iso_cnt += count;
4441 if (hdev->iso_cnt > hdev->iso_pkts)
4442 hdev->iso_cnt = hdev->iso_pkts;
4443 } else if (hdev->le_pkts) {
4444 hdev->le_cnt += count;
4445 if (hdev->le_cnt > hdev->le_pkts)
4446 hdev->le_cnt = hdev->le_pkts;
4447 } else {
4448 hdev->acl_cnt += count;
4449 if (hdev->acl_cnt > hdev->acl_pkts)
4450 hdev->acl_cnt = hdev->acl_pkts;
4451 }
4452 break;
4453
4454 default:
4455 bt_dev_err(hdev, "unknown type %d conn %p",
4456 conn->type, conn);
4457 break;
4458 }
4459 }
4460
4461 queue_work(hdev->workqueue, &hdev->tx_work);
4462 }
4463
hci_mode_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4464 static void hci_mode_change_evt(struct hci_dev *hdev, void *data,
4465 struct sk_buff *skb)
4466 {
4467 struct hci_ev_mode_change *ev = data;
4468 struct hci_conn *conn;
4469
4470 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4471
4472 hci_dev_lock(hdev);
4473
4474 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4475 if (conn) {
4476 conn->mode = ev->mode;
4477
4478 if (!test_and_clear_bit(HCI_CONN_MODE_CHANGE_PEND,
4479 &conn->flags)) {
4480 if (conn->mode == HCI_CM_ACTIVE)
4481 set_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4482 else
4483 clear_bit(HCI_CONN_POWER_SAVE, &conn->flags);
4484 }
4485
4486 if (test_and_clear_bit(HCI_CONN_SCO_SETUP_PEND, &conn->flags))
4487 hci_sco_setup(conn, ev->status);
4488 }
4489
4490 hci_dev_unlock(hdev);
4491 }
4492
hci_pin_code_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4493 static void hci_pin_code_request_evt(struct hci_dev *hdev, void *data,
4494 struct sk_buff *skb)
4495 {
4496 struct hci_ev_pin_code_req *ev = data;
4497 struct hci_conn *conn;
4498
4499 bt_dev_dbg(hdev, "");
4500
4501 hci_dev_lock(hdev);
4502
4503 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4504 if (!conn)
4505 goto unlock;
4506
4507 if (conn->state == BT_CONNECTED) {
4508 hci_conn_hold(conn);
4509 conn->disc_timeout = HCI_PAIRING_TIMEOUT;
4510 hci_conn_drop(conn);
4511 }
4512
4513 if (!hci_dev_test_flag(hdev, HCI_BONDABLE) &&
4514 !test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags)) {
4515 hci_send_cmd(hdev, HCI_OP_PIN_CODE_NEG_REPLY,
4516 sizeof(ev->bdaddr), &ev->bdaddr);
4517 } else if (hci_dev_test_flag(hdev, HCI_MGMT)) {
4518 u8 secure;
4519
4520 if (conn->pending_sec_level == BT_SECURITY_HIGH)
4521 secure = 1;
4522 else
4523 secure = 0;
4524
4525 mgmt_pin_code_request(hdev, &ev->bdaddr, secure);
4526 }
4527
4528 unlock:
4529 hci_dev_unlock(hdev);
4530 }
4531
conn_set_key(struct hci_conn * conn,u8 key_type,u8 pin_len)4532 static void conn_set_key(struct hci_conn *conn, u8 key_type, u8 pin_len)
4533 {
4534 if (key_type == HCI_LK_CHANGED_COMBINATION)
4535 return;
4536
4537 conn->pin_length = pin_len;
4538 conn->key_type = key_type;
4539
4540 switch (key_type) {
4541 case HCI_LK_LOCAL_UNIT:
4542 case HCI_LK_REMOTE_UNIT:
4543 case HCI_LK_DEBUG_COMBINATION:
4544 return;
4545 case HCI_LK_COMBINATION:
4546 if (pin_len == 16)
4547 conn->pending_sec_level = BT_SECURITY_HIGH;
4548 else
4549 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4550 break;
4551 case HCI_LK_UNAUTH_COMBINATION_P192:
4552 case HCI_LK_UNAUTH_COMBINATION_P256:
4553 conn->pending_sec_level = BT_SECURITY_MEDIUM;
4554 break;
4555 case HCI_LK_AUTH_COMBINATION_P192:
4556 conn->pending_sec_level = BT_SECURITY_HIGH;
4557 break;
4558 case HCI_LK_AUTH_COMBINATION_P256:
4559 conn->pending_sec_level = BT_SECURITY_FIPS;
4560 break;
4561 }
4562 }
4563
hci_link_key_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4564 static void hci_link_key_request_evt(struct hci_dev *hdev, void *data,
4565 struct sk_buff *skb)
4566 {
4567 struct hci_ev_link_key_req *ev = data;
4568 struct hci_cp_link_key_reply cp;
4569 struct hci_conn *conn;
4570 struct link_key *key;
4571
4572 bt_dev_dbg(hdev, "");
4573
4574 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4575 return;
4576
4577 hci_dev_lock(hdev);
4578
4579 key = hci_find_link_key(hdev, &ev->bdaddr);
4580 if (!key) {
4581 bt_dev_dbg(hdev, "link key not found for %pMR", &ev->bdaddr);
4582 goto not_found;
4583 }
4584
4585 bt_dev_dbg(hdev, "found key type %u for %pMR", key->type, &ev->bdaddr);
4586
4587 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4588 if (conn) {
4589 clear_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4590
4591 if ((key->type == HCI_LK_UNAUTH_COMBINATION_P192 ||
4592 key->type == HCI_LK_UNAUTH_COMBINATION_P256) &&
4593 conn->auth_type != 0xff && (conn->auth_type & 0x01)) {
4594 bt_dev_dbg(hdev, "ignoring unauthenticated key");
4595 goto not_found;
4596 }
4597
4598 if (key->type == HCI_LK_COMBINATION && key->pin_len < 16 &&
4599 (conn->pending_sec_level == BT_SECURITY_HIGH ||
4600 conn->pending_sec_level == BT_SECURITY_FIPS)) {
4601 bt_dev_dbg(hdev, "ignoring key unauthenticated for high security");
4602 goto not_found;
4603 }
4604
4605 conn_set_key(conn, key->type, key->pin_len);
4606 }
4607
4608 bacpy(&cp.bdaddr, &ev->bdaddr);
4609 memcpy(cp.link_key, key->val, HCI_LINK_KEY_SIZE);
4610
4611 hci_send_cmd(hdev, HCI_OP_LINK_KEY_REPLY, sizeof(cp), &cp);
4612
4613 hci_dev_unlock(hdev);
4614
4615 return;
4616
4617 not_found:
4618 hci_send_cmd(hdev, HCI_OP_LINK_KEY_NEG_REPLY, 6, &ev->bdaddr);
4619 hci_dev_unlock(hdev);
4620 }
4621
hci_link_key_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4622 static void hci_link_key_notify_evt(struct hci_dev *hdev, void *data,
4623 struct sk_buff *skb)
4624 {
4625 struct hci_ev_link_key_notify *ev = data;
4626 struct hci_conn *conn;
4627 struct link_key *key;
4628 bool persistent;
4629 u8 pin_len = 0;
4630
4631 bt_dev_dbg(hdev, "");
4632
4633 hci_dev_lock(hdev);
4634
4635 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
4636 if (!conn)
4637 goto unlock;
4638
4639 /* Ignore NULL link key against CVE-2020-26555 */
4640 if (!crypto_memneq(ev->link_key, ZERO_KEY, HCI_LINK_KEY_SIZE)) {
4641 bt_dev_dbg(hdev, "Ignore NULL link key (ZERO KEY) for %pMR",
4642 &ev->bdaddr);
4643 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
4644 hci_conn_drop(conn);
4645 goto unlock;
4646 }
4647
4648 hci_conn_hold(conn);
4649 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
4650 hci_conn_drop(conn);
4651
4652 set_bit(HCI_CONN_NEW_LINK_KEY, &conn->flags);
4653 conn_set_key(conn, ev->key_type, conn->pin_length);
4654
4655 if (!hci_dev_test_flag(hdev, HCI_MGMT))
4656 goto unlock;
4657
4658 key = hci_add_link_key(hdev, conn, &ev->bdaddr, ev->link_key,
4659 ev->key_type, pin_len, &persistent);
4660 if (!key)
4661 goto unlock;
4662
4663 /* Update connection information since adding the key will have
4664 * fixed up the type in the case of changed combination keys.
4665 */
4666 if (ev->key_type == HCI_LK_CHANGED_COMBINATION)
4667 conn_set_key(conn, key->type, key->pin_len);
4668
4669 mgmt_new_link_key(hdev, key, persistent);
4670
4671 /* Keep debug keys around only if the HCI_KEEP_DEBUG_KEYS flag
4672 * is set. If it's not set simply remove the key from the kernel
4673 * list (we've still notified user space about it but with
4674 * store_hint being 0).
4675 */
4676 if (key->type == HCI_LK_DEBUG_COMBINATION &&
4677 !hci_dev_test_flag(hdev, HCI_KEEP_DEBUG_KEYS)) {
4678 list_del_rcu(&key->list);
4679 kfree_rcu(key, rcu);
4680 goto unlock;
4681 }
4682
4683 if (persistent)
4684 clear_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4685 else
4686 set_bit(HCI_CONN_FLUSH_KEY, &conn->flags);
4687
4688 unlock:
4689 hci_dev_unlock(hdev);
4690 }
4691
hci_clock_offset_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4692 static void hci_clock_offset_evt(struct hci_dev *hdev, void *data,
4693 struct sk_buff *skb)
4694 {
4695 struct hci_ev_clock_offset *ev = data;
4696 struct hci_conn *conn;
4697
4698 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4699
4700 hci_dev_lock(hdev);
4701
4702 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4703 if (conn && !ev->status) {
4704 struct inquiry_entry *ie;
4705
4706 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4707 if (ie) {
4708 ie->data.clock_offset = ev->clock_offset;
4709 ie->timestamp = jiffies;
4710 }
4711 }
4712
4713 hci_dev_unlock(hdev);
4714 }
4715
hci_pkt_type_change_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4716 static void hci_pkt_type_change_evt(struct hci_dev *hdev, void *data,
4717 struct sk_buff *skb)
4718 {
4719 struct hci_ev_pkt_type_change *ev = data;
4720 struct hci_conn *conn;
4721
4722 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4723
4724 hci_dev_lock(hdev);
4725
4726 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4727 if (conn && !ev->status)
4728 conn->pkt_type = __le16_to_cpu(ev->pkt_type);
4729
4730 hci_dev_unlock(hdev);
4731 }
4732
hci_pscan_rep_mode_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4733 static void hci_pscan_rep_mode_evt(struct hci_dev *hdev, void *data,
4734 struct sk_buff *skb)
4735 {
4736 struct hci_ev_pscan_rep_mode *ev = data;
4737 struct inquiry_entry *ie;
4738
4739 bt_dev_dbg(hdev, "");
4740
4741 hci_dev_lock(hdev);
4742
4743 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
4744 if (ie) {
4745 ie->data.pscan_rep_mode = ev->pscan_rep_mode;
4746 ie->timestamp = jiffies;
4747 }
4748
4749 hci_dev_unlock(hdev);
4750 }
4751
hci_inquiry_result_with_rssi_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)4752 static void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, void *edata,
4753 struct sk_buff *skb)
4754 {
4755 struct hci_ev_inquiry_result_rssi *ev = edata;
4756 struct inquiry_data data;
4757 int i;
4758
4759 bt_dev_dbg(hdev, "num_rsp %d", ev->num);
4760
4761 if (!ev->num)
4762 return;
4763
4764 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
4765 return;
4766
4767 hci_dev_lock(hdev);
4768
4769 if (skb->len == array_size(ev->num,
4770 sizeof(struct inquiry_info_rssi_pscan))) {
4771 struct inquiry_info_rssi_pscan *info;
4772
4773 for (i = 0; i < ev->num; i++) {
4774 u32 flags;
4775
4776 info = hci_ev_skb_pull(hdev, skb,
4777 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4778 sizeof(*info));
4779 if (!info) {
4780 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4781 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4782 goto unlock;
4783 }
4784
4785 bacpy(&data.bdaddr, &info->bdaddr);
4786 data.pscan_rep_mode = info->pscan_rep_mode;
4787 data.pscan_period_mode = info->pscan_period_mode;
4788 data.pscan_mode = info->pscan_mode;
4789 memcpy(data.dev_class, info->dev_class, 3);
4790 data.clock_offset = info->clock_offset;
4791 data.rssi = info->rssi;
4792 data.ssp_mode = 0x00;
4793
4794 flags = hci_inquiry_cache_update(hdev, &data, false);
4795
4796 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4797 info->dev_class, info->rssi,
4798 flags, NULL, 0, NULL, 0, 0);
4799 }
4800 } else if (skb->len == array_size(ev->num,
4801 sizeof(struct inquiry_info_rssi))) {
4802 struct inquiry_info_rssi *info;
4803
4804 for (i = 0; i < ev->num; i++) {
4805 u32 flags;
4806
4807 info = hci_ev_skb_pull(hdev, skb,
4808 HCI_EV_INQUIRY_RESULT_WITH_RSSI,
4809 sizeof(*info));
4810 if (!info) {
4811 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4812 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4813 goto unlock;
4814 }
4815
4816 bacpy(&data.bdaddr, &info->bdaddr);
4817 data.pscan_rep_mode = info->pscan_rep_mode;
4818 data.pscan_period_mode = info->pscan_period_mode;
4819 data.pscan_mode = 0x00;
4820 memcpy(data.dev_class, info->dev_class, 3);
4821 data.clock_offset = info->clock_offset;
4822 data.rssi = info->rssi;
4823 data.ssp_mode = 0x00;
4824
4825 flags = hci_inquiry_cache_update(hdev, &data, false);
4826
4827 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
4828 info->dev_class, info->rssi,
4829 flags, NULL, 0, NULL, 0, 0);
4830 }
4831 } else {
4832 bt_dev_err(hdev, "Malformed HCI Event: 0x%2.2x",
4833 HCI_EV_INQUIRY_RESULT_WITH_RSSI);
4834 }
4835 unlock:
4836 hci_dev_unlock(hdev);
4837 }
4838
hci_remote_ext_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4839 static void hci_remote_ext_features_evt(struct hci_dev *hdev, void *data,
4840 struct sk_buff *skb)
4841 {
4842 struct hci_ev_remote_ext_features *ev = data;
4843 struct hci_conn *conn;
4844
4845 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
4846
4847 hci_dev_lock(hdev);
4848
4849 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
4850 if (!conn)
4851 goto unlock;
4852
4853 if (ev->page < HCI_MAX_PAGES)
4854 memcpy(conn->features[ev->page], ev->features, 8);
4855
4856 if (!ev->status && ev->page == 0x01) {
4857 struct inquiry_entry *ie;
4858
4859 ie = hci_inquiry_cache_lookup(hdev, &conn->dst);
4860 if (ie)
4861 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
4862
4863 if (ev->features[0] & LMP_HOST_SSP) {
4864 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4865 } else {
4866 /* It is mandatory by the Bluetooth specification that
4867 * Extended Inquiry Results are only used when Secure
4868 * Simple Pairing is enabled, but some devices violate
4869 * this.
4870 *
4871 * To make these devices work, the internal SSP
4872 * enabled flag needs to be cleared if the remote host
4873 * features do not indicate SSP support */
4874 clear_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
4875 }
4876
4877 if (ev->features[0] & LMP_HOST_SC)
4878 set_bit(HCI_CONN_SC_ENABLED, &conn->flags);
4879 }
4880
4881 if (conn->state != BT_CONFIG)
4882 goto unlock;
4883
4884 if (!ev->status && !test_bit(HCI_CONN_MGMT_CONNECTED, &conn->flags)) {
4885 struct hci_cp_remote_name_req cp;
4886 memset(&cp, 0, sizeof(cp));
4887 bacpy(&cp.bdaddr, &conn->dst);
4888 cp.pscan_rep_mode = 0x02;
4889 hci_send_cmd(hdev, HCI_OP_REMOTE_NAME_REQ, sizeof(cp), &cp);
4890 } else {
4891 mgmt_device_connected(hdev, conn, NULL, 0);
4892 }
4893
4894 if (!hci_outgoing_auth_needed(hdev, conn)) {
4895 conn->state = BT_CONNECTED;
4896 hci_connect_cfm(conn, ev->status);
4897 hci_conn_drop(conn);
4898 }
4899
4900 unlock:
4901 hci_dev_unlock(hdev);
4902 }
4903
hci_sync_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)4904 static void hci_sync_conn_complete_evt(struct hci_dev *hdev, void *data,
4905 struct sk_buff *skb)
4906 {
4907 struct hci_ev_sync_conn_complete *ev = data;
4908 struct hci_conn *conn;
4909 u8 status = ev->status;
4910
4911 switch (ev->link_type) {
4912 case SCO_LINK:
4913 case ESCO_LINK:
4914 break;
4915 default:
4916 /* As per Core 5.3 Vol 4 Part E 7.7.35 (p.2219), Link_Type
4917 * for HCI_Synchronous_Connection_Complete is limited to
4918 * either SCO or eSCO
4919 */
4920 bt_dev_err(hdev, "Ignoring connect complete event for invalid link type");
4921 return;
4922 }
4923
4924 bt_dev_dbg(hdev, "status 0x%2.2x", status);
4925
4926 hci_dev_lock(hdev);
4927
4928 conn = hci_conn_hash_lookup_ba(hdev, ev->link_type, &ev->bdaddr);
4929 if (!conn) {
4930 if (ev->link_type == ESCO_LINK)
4931 goto unlock;
4932
4933 /* When the link type in the event indicates SCO connection
4934 * and lookup of the connection object fails, then check
4935 * if an eSCO connection object exists.
4936 *
4937 * The core limits the synchronous connections to either
4938 * SCO or eSCO. The eSCO connection is preferred and tried
4939 * to be setup first and until successfully established,
4940 * the link type will be hinted as eSCO.
4941 */
4942 conn = hci_conn_hash_lookup_ba(hdev, ESCO_LINK, &ev->bdaddr);
4943 if (!conn)
4944 goto unlock;
4945 }
4946
4947 /* The HCI_Synchronous_Connection_Complete event is only sent once per connection.
4948 * Processing it more than once per connection can corrupt kernel memory.
4949 *
4950 * As the connection handle is set here for the first time, it indicates
4951 * whether the connection is already set up.
4952 */
4953 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
4954 bt_dev_err(hdev, "Ignoring HCI_Sync_Conn_Complete event for existing connection");
4955 goto unlock;
4956 }
4957
4958 switch (status) {
4959 case 0x00:
4960 status = hci_conn_set_handle(conn, __le16_to_cpu(ev->handle));
4961 if (status) {
4962 conn->state = BT_CLOSED;
4963 break;
4964 }
4965
4966 conn->state = BT_CONNECTED;
4967 conn->type = ev->link_type;
4968
4969 hci_debugfs_create_conn(conn);
4970 hci_conn_add_sysfs(conn);
4971 break;
4972
4973 case 0x10: /* Connection Accept Timeout */
4974 case 0x0d: /* Connection Rejected due to Limited Resources */
4975 case 0x11: /* Unsupported Feature or Parameter Value */
4976 case 0x1c: /* SCO interval rejected */
4977 case 0x1a: /* Unsupported Remote Feature */
4978 case 0x1e: /* Invalid LMP Parameters */
4979 case 0x1f: /* Unspecified error */
4980 case 0x20: /* Unsupported LMP Parameter value */
4981 if (conn->out) {
4982 conn->pkt_type = (hdev->esco_type & SCO_ESCO_MASK) |
4983 (hdev->esco_type & EDR_ESCO_MASK);
4984 if (hci_setup_sync(conn, conn->parent->handle))
4985 goto unlock;
4986 }
4987 fallthrough;
4988
4989 default:
4990 conn->state = BT_CLOSED;
4991 break;
4992 }
4993
4994 bt_dev_dbg(hdev, "SCO connected with air mode: %02x", ev->air_mode);
4995 /* Notify only in case of SCO over HCI transport data path which
4996 * is zero and non-zero value shall be non-HCI transport data path
4997 */
4998 if (conn->codec.data_path == 0 && hdev->notify) {
4999 switch (ev->air_mode) {
5000 case 0x02:
5001 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_CVSD);
5002 break;
5003 case 0x03:
5004 hdev->notify(hdev, HCI_NOTIFY_ENABLE_SCO_TRANSP);
5005 break;
5006 }
5007 }
5008
5009 hci_connect_cfm(conn, status);
5010 if (status)
5011 hci_conn_del(conn);
5012
5013 unlock:
5014 hci_dev_unlock(hdev);
5015 }
5016
eir_get_length(u8 * eir,size_t eir_len)5017 static inline size_t eir_get_length(u8 *eir, size_t eir_len)
5018 {
5019 size_t parsed = 0;
5020
5021 while (parsed < eir_len) {
5022 u8 field_len = eir[0];
5023
5024 if (field_len == 0)
5025 return parsed;
5026
5027 parsed += field_len + 1;
5028 eir += field_len + 1;
5029 }
5030
5031 return eir_len;
5032 }
5033
hci_extended_inquiry_result_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5034 static void hci_extended_inquiry_result_evt(struct hci_dev *hdev, void *edata,
5035 struct sk_buff *skb)
5036 {
5037 struct hci_ev_ext_inquiry_result *ev = edata;
5038 struct inquiry_data data;
5039 size_t eir_len;
5040 int i;
5041
5042 if (!hci_ev_skb_pull(hdev, skb, HCI_EV_EXTENDED_INQUIRY_RESULT,
5043 flex_array_size(ev, info, ev->num)))
5044 return;
5045
5046 bt_dev_dbg(hdev, "num %d", ev->num);
5047
5048 if (!ev->num)
5049 return;
5050
5051 if (hci_dev_test_flag(hdev, HCI_PERIODIC_INQ))
5052 return;
5053
5054 hci_dev_lock(hdev);
5055
5056 for (i = 0; i < ev->num; i++) {
5057 struct extended_inquiry_info *info = &ev->info[i];
5058 u32 flags;
5059 bool name_known;
5060
5061 bacpy(&data.bdaddr, &info->bdaddr);
5062 data.pscan_rep_mode = info->pscan_rep_mode;
5063 data.pscan_period_mode = info->pscan_period_mode;
5064 data.pscan_mode = 0x00;
5065 memcpy(data.dev_class, info->dev_class, 3);
5066 data.clock_offset = info->clock_offset;
5067 data.rssi = info->rssi;
5068 data.ssp_mode = 0x01;
5069
5070 if (hci_dev_test_flag(hdev, HCI_MGMT))
5071 name_known = eir_get_data(info->data,
5072 sizeof(info->data),
5073 EIR_NAME_COMPLETE, NULL);
5074 else
5075 name_known = true;
5076
5077 flags = hci_inquiry_cache_update(hdev, &data, name_known);
5078
5079 eir_len = eir_get_length(info->data, sizeof(info->data));
5080
5081 mgmt_device_found(hdev, &info->bdaddr, ACL_LINK, 0x00,
5082 info->dev_class, info->rssi,
5083 flags, info->data, eir_len, NULL, 0, 0);
5084 }
5085
5086 hci_dev_unlock(hdev);
5087 }
5088
hci_key_refresh_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5089 static void hci_key_refresh_complete_evt(struct hci_dev *hdev, void *data,
5090 struct sk_buff *skb)
5091 {
5092 struct hci_ev_key_refresh_complete *ev = data;
5093 struct hci_conn *conn;
5094
5095 bt_dev_dbg(hdev, "status 0x%2.2x handle 0x%4.4x", ev->status,
5096 __le16_to_cpu(ev->handle));
5097
5098 hci_dev_lock(hdev);
5099
5100 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5101 if (!conn)
5102 goto unlock;
5103
5104 /* For BR/EDR the necessary steps are taken through the
5105 * auth_complete event.
5106 */
5107 if (conn->type != LE_LINK)
5108 goto unlock;
5109
5110 if (!ev->status)
5111 conn->sec_level = conn->pending_sec_level;
5112
5113 clear_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags);
5114
5115 if (ev->status && conn->state == BT_CONNECTED) {
5116 hci_disconnect(conn, HCI_ERROR_AUTH_FAILURE);
5117 hci_conn_drop(conn);
5118 goto unlock;
5119 }
5120
5121 if (conn->state == BT_CONFIG) {
5122 if (!ev->status)
5123 conn->state = BT_CONNECTED;
5124
5125 hci_connect_cfm(conn, ev->status);
5126 hci_conn_drop(conn);
5127 } else {
5128 hci_auth_cfm(conn, ev->status);
5129
5130 hci_conn_hold(conn);
5131 conn->disc_timeout = HCI_DISCONN_TIMEOUT;
5132 hci_conn_drop(conn);
5133 }
5134
5135 unlock:
5136 hci_dev_unlock(hdev);
5137 }
5138
hci_get_auth_req(struct hci_conn * conn)5139 static u8 hci_get_auth_req(struct hci_conn *conn)
5140 {
5141 /* If remote requests no-bonding follow that lead */
5142 if (conn->remote_auth == HCI_AT_NO_BONDING ||
5143 conn->remote_auth == HCI_AT_NO_BONDING_MITM)
5144 return conn->remote_auth | (conn->auth_type & 0x01);
5145
5146 /* If both remote and local have enough IO capabilities, require
5147 * MITM protection
5148 */
5149 if (conn->remote_cap != HCI_IO_NO_INPUT_OUTPUT &&
5150 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT)
5151 return conn->remote_auth | 0x01;
5152
5153 /* No MITM protection possible so ignore remote requirement */
5154 return (conn->remote_auth & ~0x01) | (conn->auth_type & 0x01);
5155 }
5156
bredr_oob_data_present(struct hci_conn * conn)5157 static u8 bredr_oob_data_present(struct hci_conn *conn)
5158 {
5159 struct hci_dev *hdev = conn->hdev;
5160 struct oob_data *data;
5161
5162 data = hci_find_remote_oob_data(hdev, &conn->dst, BDADDR_BREDR);
5163 if (!data)
5164 return 0x00;
5165
5166 if (bredr_sc_enabled(hdev)) {
5167 /* When Secure Connections is enabled, then just
5168 * return the present value stored with the OOB
5169 * data. The stored value contains the right present
5170 * information. However it can only be trusted when
5171 * not in Secure Connection Only mode.
5172 */
5173 if (!hci_dev_test_flag(hdev, HCI_SC_ONLY))
5174 return data->present;
5175
5176 /* When Secure Connections Only mode is enabled, then
5177 * the P-256 values are required. If they are not
5178 * available, then do not declare that OOB data is
5179 * present.
5180 */
5181 if (!crypto_memneq(data->rand256, ZERO_KEY, 16) ||
5182 !crypto_memneq(data->hash256, ZERO_KEY, 16))
5183 return 0x00;
5184
5185 return 0x02;
5186 }
5187
5188 /* When Secure Connections is not enabled or actually
5189 * not supported by the hardware, then check that if
5190 * P-192 data values are present.
5191 */
5192 if (!crypto_memneq(data->rand192, ZERO_KEY, 16) ||
5193 !crypto_memneq(data->hash192, ZERO_KEY, 16))
5194 return 0x00;
5195
5196 return 0x01;
5197 }
5198
hci_io_capa_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5199 static void hci_io_capa_request_evt(struct hci_dev *hdev, void *data,
5200 struct sk_buff *skb)
5201 {
5202 struct hci_ev_io_capa_request *ev = data;
5203 struct hci_conn *conn;
5204
5205 bt_dev_dbg(hdev, "");
5206
5207 hci_dev_lock(hdev);
5208
5209 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5210 if (!conn || !hci_dev_test_flag(hdev, HCI_SSP_ENABLED))
5211 goto unlock;
5212
5213 /* Assume remote supports SSP since it has triggered this event */
5214 set_bit(HCI_CONN_SSP_ENABLED, &conn->flags);
5215
5216 hci_conn_hold(conn);
5217
5218 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5219 goto unlock;
5220
5221 /* Allow pairing if we're pairable, the initiators of the
5222 * pairing or if the remote is not requesting bonding.
5223 */
5224 if (hci_dev_test_flag(hdev, HCI_BONDABLE) ||
5225 test_bit(HCI_CONN_AUTH_INITIATOR, &conn->flags) ||
5226 (conn->remote_auth & ~0x01) == HCI_AT_NO_BONDING) {
5227 struct hci_cp_io_capability_reply cp;
5228
5229 bacpy(&cp.bdaddr, &ev->bdaddr);
5230 /* Change the IO capability from KeyboardDisplay
5231 * to DisplayYesNo as it is not supported by BT spec. */
5232 cp.capability = (conn->io_capability == 0x04) ?
5233 HCI_IO_DISPLAY_YESNO : conn->io_capability;
5234
5235 /* If we are initiators, there is no remote information yet */
5236 if (conn->remote_auth == 0xff) {
5237 /* Request MITM protection if our IO caps allow it
5238 * except for the no-bonding case.
5239 */
5240 if (conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5241 conn->auth_type != HCI_AT_NO_BONDING)
5242 conn->auth_type |= 0x01;
5243 } else {
5244 conn->auth_type = hci_get_auth_req(conn);
5245 }
5246
5247 /* If we're not bondable, force one of the non-bondable
5248 * authentication requirement values.
5249 */
5250 if (!hci_dev_test_flag(hdev, HCI_BONDABLE))
5251 conn->auth_type &= HCI_AT_NO_BONDING_MITM;
5252
5253 cp.authentication = conn->auth_type;
5254 cp.oob_data = bredr_oob_data_present(conn);
5255
5256 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_REPLY,
5257 sizeof(cp), &cp);
5258 } else {
5259 struct hci_cp_io_capability_neg_reply cp;
5260
5261 bacpy(&cp.bdaddr, &ev->bdaddr);
5262 cp.reason = HCI_ERROR_PAIRING_NOT_ALLOWED;
5263
5264 hci_send_cmd(hdev, HCI_OP_IO_CAPABILITY_NEG_REPLY,
5265 sizeof(cp), &cp);
5266 }
5267
5268 unlock:
5269 hci_dev_unlock(hdev);
5270 }
5271
hci_io_capa_reply_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5272 static void hci_io_capa_reply_evt(struct hci_dev *hdev, void *data,
5273 struct sk_buff *skb)
5274 {
5275 struct hci_ev_io_capa_reply *ev = data;
5276 struct hci_conn *conn;
5277
5278 bt_dev_dbg(hdev, "");
5279
5280 hci_dev_lock(hdev);
5281
5282 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5283 if (!conn)
5284 goto unlock;
5285
5286 conn->remote_cap = ev->capability;
5287 conn->remote_auth = ev->authentication;
5288
5289 unlock:
5290 hci_dev_unlock(hdev);
5291 }
5292
hci_user_confirm_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5293 static void hci_user_confirm_request_evt(struct hci_dev *hdev, void *data,
5294 struct sk_buff *skb)
5295 {
5296 struct hci_ev_user_confirm_req *ev = data;
5297 int loc_mitm, rem_mitm, confirm_hint = 0;
5298 struct hci_conn *conn;
5299
5300 bt_dev_dbg(hdev, "");
5301
5302 hci_dev_lock(hdev);
5303
5304 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5305 goto unlock;
5306
5307 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5308 if (!conn)
5309 goto unlock;
5310
5311 loc_mitm = (conn->auth_type & 0x01);
5312 rem_mitm = (conn->remote_auth & 0x01);
5313
5314 /* If we require MITM but the remote device can't provide that
5315 * (it has NoInputNoOutput) then reject the confirmation
5316 * request. We check the security level here since it doesn't
5317 * necessarily match conn->auth_type.
5318 */
5319 if (conn->pending_sec_level > BT_SECURITY_MEDIUM &&
5320 conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) {
5321 bt_dev_dbg(hdev, "Rejecting request: remote device can't provide MITM");
5322 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_NEG_REPLY,
5323 sizeof(ev->bdaddr), &ev->bdaddr);
5324 goto unlock;
5325 }
5326
5327 /* If no side requires MITM protection; auto-accept */
5328 if ((!loc_mitm || conn->remote_cap == HCI_IO_NO_INPUT_OUTPUT) &&
5329 (!rem_mitm || conn->io_capability == HCI_IO_NO_INPUT_OUTPUT)) {
5330
5331 /* If we're not the initiators request authorization to
5332 * proceed from user space (mgmt_user_confirm with
5333 * confirm_hint set to 1). The exception is if neither
5334 * side had MITM or if the local IO capability is
5335 * NoInputNoOutput, in which case we do auto-accept
5336 */
5337 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) &&
5338 conn->io_capability != HCI_IO_NO_INPUT_OUTPUT &&
5339 (loc_mitm || rem_mitm)) {
5340 bt_dev_dbg(hdev, "Confirming auto-accept as acceptor");
5341 confirm_hint = 1;
5342 goto confirm;
5343 }
5344
5345 /* If there already exists link key in local host, leave the
5346 * decision to user space since the remote device could be
5347 * legitimate or malicious.
5348 */
5349 if (hci_find_link_key(hdev, &ev->bdaddr)) {
5350 bt_dev_dbg(hdev, "Local host already has link key");
5351 confirm_hint = 1;
5352 goto confirm;
5353 }
5354
5355 BT_DBG("Auto-accept of user confirmation with %ums delay",
5356 hdev->auto_accept_delay);
5357
5358 if (hdev->auto_accept_delay > 0) {
5359 int delay = msecs_to_jiffies(hdev->auto_accept_delay);
5360 queue_delayed_work(conn->hdev->workqueue,
5361 &conn->auto_accept_work, delay);
5362 goto unlock;
5363 }
5364
5365 hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY,
5366 sizeof(ev->bdaddr), &ev->bdaddr);
5367 goto unlock;
5368 }
5369
5370 confirm:
5371 mgmt_user_confirm_request(hdev, &ev->bdaddr, ACL_LINK, 0,
5372 le32_to_cpu(ev->passkey), confirm_hint);
5373
5374 unlock:
5375 hci_dev_unlock(hdev);
5376 }
5377
hci_user_passkey_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5378 static void hci_user_passkey_request_evt(struct hci_dev *hdev, void *data,
5379 struct sk_buff *skb)
5380 {
5381 struct hci_ev_user_passkey_req *ev = data;
5382
5383 bt_dev_dbg(hdev, "");
5384
5385 if (hci_dev_test_flag(hdev, HCI_MGMT))
5386 mgmt_user_passkey_request(hdev, &ev->bdaddr, ACL_LINK, 0);
5387 }
5388
hci_user_passkey_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5389 static void hci_user_passkey_notify_evt(struct hci_dev *hdev, void *data,
5390 struct sk_buff *skb)
5391 {
5392 struct hci_ev_user_passkey_notify *ev = data;
5393 struct hci_conn *conn;
5394
5395 bt_dev_dbg(hdev, "");
5396
5397 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5398 if (!conn)
5399 return;
5400
5401 conn->passkey_notify = __le32_to_cpu(ev->passkey);
5402 conn->passkey_entered = 0;
5403
5404 if (hci_dev_test_flag(hdev, HCI_MGMT))
5405 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5406 conn->dst_type, conn->passkey_notify,
5407 conn->passkey_entered);
5408 }
5409
hci_keypress_notify_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5410 static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data,
5411 struct sk_buff *skb)
5412 {
5413 struct hci_ev_keypress_notify *ev = data;
5414 struct hci_conn *conn;
5415
5416 bt_dev_dbg(hdev, "");
5417
5418 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5419 if (!conn)
5420 return;
5421
5422 switch (ev->type) {
5423 case HCI_KEYPRESS_STARTED:
5424 conn->passkey_entered = 0;
5425 return;
5426
5427 case HCI_KEYPRESS_ENTERED:
5428 conn->passkey_entered++;
5429 break;
5430
5431 case HCI_KEYPRESS_ERASED:
5432 conn->passkey_entered--;
5433 break;
5434
5435 case HCI_KEYPRESS_CLEARED:
5436 conn->passkey_entered = 0;
5437 break;
5438
5439 case HCI_KEYPRESS_COMPLETED:
5440 return;
5441 }
5442
5443 if (hci_dev_test_flag(hdev, HCI_MGMT))
5444 mgmt_user_passkey_notify(hdev, &conn->dst, conn->type,
5445 conn->dst_type, conn->passkey_notify,
5446 conn->passkey_entered);
5447 }
5448
hci_simple_pair_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5449 static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,
5450 struct sk_buff *skb)
5451 {
5452 struct hci_ev_simple_pair_complete *ev = data;
5453 struct hci_conn *conn;
5454
5455 bt_dev_dbg(hdev, "");
5456
5457 hci_dev_lock(hdev);
5458
5459 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5460 if (!conn || !hci_conn_ssp_enabled(conn))
5461 goto unlock;
5462
5463 /* Reset the authentication requirement to unknown */
5464 conn->remote_auth = 0xff;
5465
5466 /* To avoid duplicate auth_failed events to user space we check
5467 * the HCI_CONN_AUTH_PEND flag which will be set if we
5468 * initiated the authentication. A traditional auth_complete
5469 * event gets always produced as initiator and is also mapped to
5470 * the mgmt_auth_failed event */
5471 if (!test_bit(HCI_CONN_AUTH_PEND, &conn->flags) && ev->status)
5472 mgmt_auth_failed(conn, ev->status);
5473
5474 hci_conn_drop(conn);
5475
5476 unlock:
5477 hci_dev_unlock(hdev);
5478 }
5479
hci_remote_host_features_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5480 static void hci_remote_host_features_evt(struct hci_dev *hdev, void *data,
5481 struct sk_buff *skb)
5482 {
5483 struct hci_ev_remote_host_features *ev = data;
5484 struct inquiry_entry *ie;
5485 struct hci_conn *conn;
5486
5487 bt_dev_dbg(hdev, "");
5488
5489 hci_dev_lock(hdev);
5490
5491 conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr);
5492 if (conn)
5493 memcpy(conn->features[1], ev->features, 8);
5494
5495 ie = hci_inquiry_cache_lookup(hdev, &ev->bdaddr);
5496 if (ie)
5497 ie->data.ssp_mode = (ev->features[0] & LMP_HOST_SSP);
5498
5499 hci_dev_unlock(hdev);
5500 }
5501
hci_remote_oob_data_request_evt(struct hci_dev * hdev,void * edata,struct sk_buff * skb)5502 static void hci_remote_oob_data_request_evt(struct hci_dev *hdev, void *edata,
5503 struct sk_buff *skb)
5504 {
5505 struct hci_ev_remote_oob_data_request *ev = edata;
5506 struct oob_data *data;
5507
5508 bt_dev_dbg(hdev, "");
5509
5510 hci_dev_lock(hdev);
5511
5512 if (!hci_dev_test_flag(hdev, HCI_MGMT))
5513 goto unlock;
5514
5515 data = hci_find_remote_oob_data(hdev, &ev->bdaddr, BDADDR_BREDR);
5516 if (!data) {
5517 struct hci_cp_remote_oob_data_neg_reply cp;
5518
5519 bacpy(&cp.bdaddr, &ev->bdaddr);
5520 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_NEG_REPLY,
5521 sizeof(cp), &cp);
5522 goto unlock;
5523 }
5524
5525 if (bredr_sc_enabled(hdev)) {
5526 struct hci_cp_remote_oob_ext_data_reply cp;
5527
5528 bacpy(&cp.bdaddr, &ev->bdaddr);
5529 if (hci_dev_test_flag(hdev, HCI_SC_ONLY)) {
5530 memset(cp.hash192, 0, sizeof(cp.hash192));
5531 memset(cp.rand192, 0, sizeof(cp.rand192));
5532 } else {
5533 memcpy(cp.hash192, data->hash192, sizeof(cp.hash192));
5534 memcpy(cp.rand192, data->rand192, sizeof(cp.rand192));
5535 }
5536 memcpy(cp.hash256, data->hash256, sizeof(cp.hash256));
5537 memcpy(cp.rand256, data->rand256, sizeof(cp.rand256));
5538
5539 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_EXT_DATA_REPLY,
5540 sizeof(cp), &cp);
5541 } else {
5542 struct hci_cp_remote_oob_data_reply cp;
5543
5544 bacpy(&cp.bdaddr, &ev->bdaddr);
5545 memcpy(cp.hash, data->hash192, sizeof(cp.hash));
5546 memcpy(cp.rand, data->rand192, sizeof(cp.rand));
5547
5548 hci_send_cmd(hdev, HCI_OP_REMOTE_OOB_DATA_REPLY,
5549 sizeof(cp), &cp);
5550 }
5551
5552 unlock:
5553 hci_dev_unlock(hdev);
5554 }
5555
le_conn_update_addr(struct hci_conn * conn,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa)5556 static void le_conn_update_addr(struct hci_conn *conn, bdaddr_t *bdaddr,
5557 u8 bdaddr_type, bdaddr_t *local_rpa)
5558 {
5559 if (conn->out) {
5560 conn->dst_type = bdaddr_type;
5561 conn->resp_addr_type = bdaddr_type;
5562 bacpy(&conn->resp_addr, bdaddr);
5563
5564 /* Check if the controller has set a Local RPA then it must be
5565 * used instead or hdev->rpa.
5566 */
5567 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5568 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5569 bacpy(&conn->init_addr, local_rpa);
5570 } else if (hci_dev_test_flag(conn->hdev, HCI_PRIVACY)) {
5571 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5572 bacpy(&conn->init_addr, &conn->hdev->rpa);
5573 } else {
5574 hci_copy_identity_address(conn->hdev, &conn->init_addr,
5575 &conn->init_addr_type);
5576 }
5577 } else {
5578 conn->resp_addr_type = conn->hdev->adv_addr_type;
5579 /* Check if the controller has set a Local RPA then it must be
5580 * used instead or hdev->rpa.
5581 */
5582 if (local_rpa && bacmp(local_rpa, BDADDR_ANY)) {
5583 conn->resp_addr_type = ADDR_LE_DEV_RANDOM;
5584 bacpy(&conn->resp_addr, local_rpa);
5585 } else if (conn->hdev->adv_addr_type == ADDR_LE_DEV_RANDOM) {
5586 /* In case of ext adv, resp_addr will be updated in
5587 * Adv Terminated event.
5588 */
5589 if (!ext_adv_capable(conn->hdev))
5590 bacpy(&conn->resp_addr,
5591 &conn->hdev->random_addr);
5592 } else {
5593 bacpy(&conn->resp_addr, &conn->hdev->bdaddr);
5594 }
5595
5596 conn->init_addr_type = bdaddr_type;
5597 bacpy(&conn->init_addr, bdaddr);
5598
5599 /* For incoming connections, set the default minimum
5600 * and maximum connection interval. They will be used
5601 * to check if the parameters are in range and if not
5602 * trigger the connection update procedure.
5603 */
5604 conn->le_conn_min_interval = conn->hdev->le_conn_min_interval;
5605 conn->le_conn_max_interval = conn->hdev->le_conn_max_interval;
5606 }
5607 }
5608
le_conn_complete_evt(struct hci_dev * hdev,u8 status,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * local_rpa,u8 role,u16 handle,u16 interval,u16 latency,u16 supervision_timeout)5609 static void le_conn_complete_evt(struct hci_dev *hdev, u8 status,
5610 bdaddr_t *bdaddr, u8 bdaddr_type,
5611 bdaddr_t *local_rpa, u8 role, u16 handle,
5612 u16 interval, u16 latency,
5613 u16 supervision_timeout)
5614 {
5615 struct hci_conn_params *params;
5616 struct hci_conn *conn;
5617 struct smp_irk *irk;
5618 u8 addr_type;
5619
5620 hci_dev_lock(hdev);
5621
5622 /* All controllers implicitly stop advertising in the event of a
5623 * connection, so ensure that the state bit is cleared.
5624 */
5625 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5626
5627 conn = hci_conn_hash_lookup_ba(hdev, LE_LINK, bdaddr);
5628 if (!conn) {
5629 /* In case of error status and there is no connection pending
5630 * just unlock as there is nothing to cleanup.
5631 */
5632 if (status)
5633 goto unlock;
5634
5635 conn = hci_conn_add_unset(hdev, LE_LINK, bdaddr, role);
5636 if (IS_ERR(conn)) {
5637 bt_dev_err(hdev, "connection err: %ld", PTR_ERR(conn));
5638 goto unlock;
5639 }
5640
5641 conn->dst_type = bdaddr_type;
5642
5643 /* If we didn't have a hci_conn object previously
5644 * but we're in central role this must be something
5645 * initiated using an accept list. Since accept list based
5646 * connections are not "first class citizens" we don't
5647 * have full tracking of them. Therefore, we go ahead
5648 * with a "best effort" approach of determining the
5649 * initiator address based on the HCI_PRIVACY flag.
5650 */
5651 if (conn->out) {
5652 conn->resp_addr_type = bdaddr_type;
5653 bacpy(&conn->resp_addr, bdaddr);
5654 if (hci_dev_test_flag(hdev, HCI_PRIVACY)) {
5655 conn->init_addr_type = ADDR_LE_DEV_RANDOM;
5656 bacpy(&conn->init_addr, &hdev->rpa);
5657 } else {
5658 hci_copy_identity_address(hdev,
5659 &conn->init_addr,
5660 &conn->init_addr_type);
5661 }
5662 }
5663 } else {
5664 cancel_delayed_work(&conn->le_conn_timeout);
5665 }
5666
5667 /* The HCI_LE_Connection_Complete event is only sent once per connection.
5668 * Processing it more than once per connection can corrupt kernel memory.
5669 *
5670 * As the connection handle is set here for the first time, it indicates
5671 * whether the connection is already set up.
5672 */
5673 if (!HCI_CONN_HANDLE_UNSET(conn->handle)) {
5674 bt_dev_err(hdev, "Ignoring HCI_Connection_Complete for existing connection");
5675 goto unlock;
5676 }
5677
5678 le_conn_update_addr(conn, bdaddr, bdaddr_type, local_rpa);
5679
5680 /* Lookup the identity address from the stored connection
5681 * address and address type.
5682 *
5683 * When establishing connections to an identity address, the
5684 * connection procedure will store the resolvable random
5685 * address first. Now if it can be converted back into the
5686 * identity address, start using the identity address from
5687 * now on.
5688 */
5689 irk = hci_get_irk(hdev, &conn->dst, conn->dst_type);
5690 if (irk) {
5691 bacpy(&conn->dst, &irk->bdaddr);
5692 conn->dst_type = irk->addr_type;
5693 }
5694
5695 conn->dst_type = ev_bdaddr_type(hdev, conn->dst_type, NULL);
5696
5697 /* All connection failure handling is taken care of by the
5698 * hci_conn_failed function which is triggered by the HCI
5699 * request completion callbacks used for connecting.
5700 */
5701 if (status || hci_conn_set_handle(conn, handle))
5702 goto unlock;
5703
5704 /* Drop the connection if it has been aborted */
5705 if (test_bit(HCI_CONN_CANCEL, &conn->flags)) {
5706 hci_conn_drop(conn);
5707 goto unlock;
5708 }
5709
5710 if (conn->dst_type == ADDR_LE_DEV_PUBLIC)
5711 addr_type = BDADDR_LE_PUBLIC;
5712 else
5713 addr_type = BDADDR_LE_RANDOM;
5714
5715 /* Drop the connection if the device is blocked */
5716 if (hci_bdaddr_list_lookup(&hdev->reject_list, &conn->dst, addr_type)) {
5717 hci_conn_drop(conn);
5718 goto unlock;
5719 }
5720
5721 mgmt_device_connected(hdev, conn, NULL, 0);
5722
5723 conn->sec_level = BT_SECURITY_LOW;
5724 conn->state = BT_CONFIG;
5725
5726 /* Store current advertising instance as connection advertising instance
5727 * when sotfware rotation is in use so it can be re-enabled when
5728 * disconnected.
5729 */
5730 if (!ext_adv_capable(hdev))
5731 conn->adv_instance = hdev->cur_adv_instance;
5732
5733 conn->le_conn_interval = interval;
5734 conn->le_conn_latency = latency;
5735 conn->le_supv_timeout = supervision_timeout;
5736
5737 hci_debugfs_create_conn(conn);
5738 hci_conn_add_sysfs(conn);
5739
5740 /* The remote features procedure is defined for central
5741 * role only. So only in case of an initiated connection
5742 * request the remote features.
5743 *
5744 * If the local controller supports peripheral-initiated features
5745 * exchange, then requesting the remote features in peripheral
5746 * role is possible. Otherwise just transition into the
5747 * connected state without requesting the remote features.
5748 */
5749 if (conn->out ||
5750 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES)) {
5751 struct hci_cp_le_read_remote_features cp;
5752
5753 cp.handle = __cpu_to_le16(conn->handle);
5754
5755 hci_send_cmd(hdev, HCI_OP_LE_READ_REMOTE_FEATURES,
5756 sizeof(cp), &cp);
5757
5758 hci_conn_hold(conn);
5759 } else {
5760 conn->state = BT_CONNECTED;
5761 hci_connect_cfm(conn, status);
5762 }
5763
5764 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, &conn->dst,
5765 conn->dst_type);
5766 if (params) {
5767 hci_pend_le_list_del_init(params);
5768 if (params->conn) {
5769 hci_conn_drop(params->conn);
5770 hci_conn_put(params->conn);
5771 params->conn = NULL;
5772 }
5773 }
5774
5775 unlock:
5776 hci_update_passive_scan(hdev);
5777 hci_dev_unlock(hdev);
5778 }
5779
hci_le_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5780 static void hci_le_conn_complete_evt(struct hci_dev *hdev, void *data,
5781 struct sk_buff *skb)
5782 {
5783 struct hci_ev_le_conn_complete *ev = data;
5784
5785 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5786
5787 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5788 NULL, ev->role, le16_to_cpu(ev->handle),
5789 le16_to_cpu(ev->interval),
5790 le16_to_cpu(ev->latency),
5791 le16_to_cpu(ev->supervision_timeout));
5792 }
5793
hci_le_enh_conn_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5794 static void hci_le_enh_conn_complete_evt(struct hci_dev *hdev, void *data,
5795 struct sk_buff *skb)
5796 {
5797 struct hci_ev_le_enh_conn_complete *ev = data;
5798
5799 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5800
5801 le_conn_complete_evt(hdev, ev->status, &ev->bdaddr, ev->bdaddr_type,
5802 &ev->local_rpa, ev->role, le16_to_cpu(ev->handle),
5803 le16_to_cpu(ev->interval),
5804 le16_to_cpu(ev->latency),
5805 le16_to_cpu(ev->supervision_timeout));
5806 }
5807
hci_le_ext_adv_term_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5808 static void hci_le_ext_adv_term_evt(struct hci_dev *hdev, void *data,
5809 struct sk_buff *skb)
5810 {
5811 struct hci_evt_le_ext_adv_set_term *ev = data;
5812 struct hci_conn *conn;
5813 struct adv_info *adv, *n;
5814
5815 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5816
5817 /* The Bluetooth Core 5.3 specification clearly states that this event
5818 * shall not be sent when the Host disables the advertising set. So in
5819 * case of HCI_ERROR_CANCELLED_BY_HOST, just ignore the event.
5820 *
5821 * When the Host disables an advertising set, all cleanup is done via
5822 * its command callback and not needed to be duplicated here.
5823 */
5824 if (ev->status == HCI_ERROR_CANCELLED_BY_HOST) {
5825 bt_dev_warn_ratelimited(hdev, "Unexpected advertising set terminated event");
5826 return;
5827 }
5828
5829 hci_dev_lock(hdev);
5830
5831 adv = hci_find_adv_instance(hdev, ev->handle);
5832
5833 if (ev->status) {
5834 if (!adv)
5835 goto unlock;
5836
5837 /* Remove advertising as it has been terminated */
5838 hci_remove_adv_instance(hdev, ev->handle);
5839 mgmt_advertising_removed(NULL, hdev, ev->handle);
5840
5841 list_for_each_entry_safe(adv, n, &hdev->adv_instances, list) {
5842 if (adv->enabled)
5843 goto unlock;
5844 }
5845
5846 /* We are no longer advertising, clear HCI_LE_ADV */
5847 hci_dev_clear_flag(hdev, HCI_LE_ADV);
5848 goto unlock;
5849 }
5850
5851 if (adv)
5852 adv->enabled = false;
5853
5854 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->conn_handle));
5855 if (conn) {
5856 /* Store handle in the connection so the correct advertising
5857 * instance can be re-enabled when disconnected.
5858 */
5859 conn->adv_instance = ev->handle;
5860
5861 if (hdev->adv_addr_type != ADDR_LE_DEV_RANDOM ||
5862 bacmp(&conn->resp_addr, BDADDR_ANY))
5863 goto unlock;
5864
5865 if (!ev->handle) {
5866 bacpy(&conn->resp_addr, &hdev->random_addr);
5867 goto unlock;
5868 }
5869
5870 if (adv)
5871 bacpy(&conn->resp_addr, &adv->random_addr);
5872 }
5873
5874 unlock:
5875 hci_dev_unlock(hdev);
5876 }
5877
hci_le_conn_update_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)5878 static void hci_le_conn_update_complete_evt(struct hci_dev *hdev, void *data,
5879 struct sk_buff *skb)
5880 {
5881 struct hci_ev_le_conn_update_complete *ev = data;
5882 struct hci_conn *conn;
5883
5884 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
5885
5886 if (ev->status)
5887 return;
5888
5889 hci_dev_lock(hdev);
5890
5891 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
5892 if (conn) {
5893 conn->le_conn_interval = le16_to_cpu(ev->interval);
5894 conn->le_conn_latency = le16_to_cpu(ev->latency);
5895 conn->le_supv_timeout = le16_to_cpu(ev->supervision_timeout);
5896 }
5897
5898 hci_dev_unlock(hdev);
5899 }
5900
5901 /* This function requires the caller holds hdev->lock */
check_pending_le_conn(struct hci_dev * hdev,bdaddr_t * addr,u8 addr_type,bool addr_resolved,u8 adv_type,u8 phy,u8 sec_phy)5902 static struct hci_conn *check_pending_le_conn(struct hci_dev *hdev,
5903 bdaddr_t *addr,
5904 u8 addr_type, bool addr_resolved,
5905 u8 adv_type, u8 phy, u8 sec_phy)
5906 {
5907 struct hci_conn *conn;
5908 struct hci_conn_params *params;
5909
5910 /* If the event is not connectable don't proceed further */
5911 if (adv_type != LE_ADV_IND && adv_type != LE_ADV_DIRECT_IND)
5912 return NULL;
5913
5914 /* Ignore if the device is blocked or hdev is suspended */
5915 if (hci_bdaddr_list_lookup(&hdev->reject_list, addr, addr_type) ||
5916 hdev->suspended)
5917 return NULL;
5918
5919 /* Most controller will fail if we try to create new connections
5920 * while we have an existing one in peripheral role.
5921 */
5922 if (hdev->conn_hash.le_num_peripheral > 0 &&
5923 (!test_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks) ||
5924 !(hdev->le_states[3] & 0x10)))
5925 return NULL;
5926
5927 /* If we're not connectable only connect devices that we have in
5928 * our pend_le_conns list.
5929 */
5930 params = hci_pend_le_action_lookup(&hdev->pend_le_conns, addr,
5931 addr_type);
5932 if (!params)
5933 return NULL;
5934
5935 if (!params->explicit_connect) {
5936 switch (params->auto_connect) {
5937 case HCI_AUTO_CONN_DIRECT:
5938 /* Only devices advertising with ADV_DIRECT_IND are
5939 * triggering a connection attempt. This is allowing
5940 * incoming connections from peripheral devices.
5941 */
5942 if (adv_type != LE_ADV_DIRECT_IND)
5943 return NULL;
5944 break;
5945 case HCI_AUTO_CONN_ALWAYS:
5946 /* Devices advertising with ADV_IND or ADV_DIRECT_IND
5947 * are triggering a connection attempt. This means
5948 * that incoming connections from peripheral device are
5949 * accepted and also outgoing connections to peripheral
5950 * devices are established when found.
5951 */
5952 break;
5953 default:
5954 return NULL;
5955 }
5956 }
5957
5958 conn = hci_connect_le(hdev, addr, addr_type, addr_resolved,
5959 BT_SECURITY_LOW, hdev->def_le_autoconnect_timeout,
5960 HCI_ROLE_MASTER, phy, sec_phy);
5961 if (!IS_ERR(conn)) {
5962 /* If HCI_AUTO_CONN_EXPLICIT is set, conn is already owned
5963 * by higher layer that tried to connect, if no then
5964 * store the pointer since we don't really have any
5965 * other owner of the object besides the params that
5966 * triggered it. This way we can abort the connection if
5967 * the parameters get removed and keep the reference
5968 * count consistent once the connection is established.
5969 */
5970
5971 if (!params->explicit_connect)
5972 params->conn = hci_conn_get(conn);
5973
5974 return conn;
5975 }
5976
5977 switch (PTR_ERR(conn)) {
5978 case -EBUSY:
5979 /* If hci_connect() returns -EBUSY it means there is already
5980 * an LE connection attempt going on. Since controllers don't
5981 * support more than one connection attempt at the time, we
5982 * don't consider this an error case.
5983 */
5984 break;
5985 default:
5986 BT_DBG("Failed to connect: err %ld", PTR_ERR(conn));
5987 return NULL;
5988 }
5989
5990 return NULL;
5991 }
5992
process_adv_report(struct hci_dev * hdev,u8 type,bdaddr_t * bdaddr,u8 bdaddr_type,bdaddr_t * direct_addr,u8 direct_addr_type,u8 phy,u8 sec_phy,s8 rssi,u8 * data,u8 len,bool ext_adv,bool ctl_time,u64 instant)5993 static void process_adv_report(struct hci_dev *hdev, u8 type, bdaddr_t *bdaddr,
5994 u8 bdaddr_type, bdaddr_t *direct_addr,
5995 u8 direct_addr_type, u8 phy, u8 sec_phy, s8 rssi,
5996 u8 *data, u8 len, bool ext_adv, bool ctl_time,
5997 u64 instant)
5998 {
5999 struct discovery_state *d = &hdev->discovery;
6000 struct smp_irk *irk;
6001 struct hci_conn *conn;
6002 bool match, bdaddr_resolved;
6003 u32 flags;
6004 u8 *ptr;
6005
6006 switch (type) {
6007 case LE_ADV_IND:
6008 case LE_ADV_DIRECT_IND:
6009 case LE_ADV_SCAN_IND:
6010 case LE_ADV_NONCONN_IND:
6011 case LE_ADV_SCAN_RSP:
6012 break;
6013 default:
6014 bt_dev_err_ratelimited(hdev, "unknown advertising packet "
6015 "type: 0x%02x", type);
6016 return;
6017 }
6018
6019 if (len > max_adv_len(hdev)) {
6020 bt_dev_err_ratelimited(hdev,
6021 "adv larger than maximum supported");
6022 return;
6023 }
6024
6025 /* Find the end of the data in case the report contains padded zero
6026 * bytes at the end causing an invalid length value.
6027 *
6028 * When data is NULL, len is 0 so there is no need for extra ptr
6029 * check as 'ptr < data + 0' is already false in such case.
6030 */
6031 for (ptr = data; ptr < data + len && *ptr; ptr += *ptr + 1) {
6032 if (ptr + 1 + *ptr > data + len)
6033 break;
6034 }
6035
6036 /* Adjust for actual length. This handles the case when remote
6037 * device is advertising with incorrect data length.
6038 */
6039 len = ptr - data;
6040
6041 /* If the direct address is present, then this report is from
6042 * a LE Direct Advertising Report event. In that case it is
6043 * important to see if the address is matching the local
6044 * controller address.
6045 */
6046 if (!hci_dev_test_flag(hdev, HCI_MESH) && direct_addr) {
6047 direct_addr_type = ev_bdaddr_type(hdev, direct_addr_type,
6048 &bdaddr_resolved);
6049
6050 /* Only resolvable random addresses are valid for these
6051 * kind of reports and others can be ignored.
6052 */
6053 if (!hci_bdaddr_is_rpa(direct_addr, direct_addr_type))
6054 return;
6055
6056 /* If the controller is not using resolvable random
6057 * addresses, then this report can be ignored.
6058 */
6059 if (!hci_dev_test_flag(hdev, HCI_PRIVACY))
6060 return;
6061
6062 /* If the local IRK of the controller does not match
6063 * with the resolvable random address provided, then
6064 * this report can be ignored.
6065 */
6066 if (!smp_irk_matches(hdev, hdev->irk, direct_addr))
6067 return;
6068 }
6069
6070 /* Check if we need to convert to identity address */
6071 irk = hci_get_irk(hdev, bdaddr, bdaddr_type);
6072 if (irk) {
6073 bdaddr = &irk->bdaddr;
6074 bdaddr_type = irk->addr_type;
6075 }
6076
6077 bdaddr_type = ev_bdaddr_type(hdev, bdaddr_type, &bdaddr_resolved);
6078
6079 /* Check if we have been requested to connect to this device.
6080 *
6081 * direct_addr is set only for directed advertising reports (it is NULL
6082 * for advertising reports) and is already verified to be RPA above.
6083 */
6084 conn = check_pending_le_conn(hdev, bdaddr, bdaddr_type, bdaddr_resolved,
6085 type, phy, sec_phy);
6086 if (!ext_adv && conn && type == LE_ADV_IND &&
6087 len <= max_adv_len(hdev)) {
6088 /* Store report for later inclusion by
6089 * mgmt_device_connected
6090 */
6091 memcpy(conn->le_adv_data, data, len);
6092 conn->le_adv_data_len = len;
6093 }
6094
6095 if (type == LE_ADV_NONCONN_IND || type == LE_ADV_SCAN_IND)
6096 flags = MGMT_DEV_FOUND_NOT_CONNECTABLE;
6097 else
6098 flags = 0;
6099
6100 /* All scan results should be sent up for Mesh systems */
6101 if (hci_dev_test_flag(hdev, HCI_MESH)) {
6102 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6103 rssi, flags, data, len, NULL, 0, instant);
6104 return;
6105 }
6106
6107 /* Passive scanning shouldn't trigger any device found events,
6108 * except for devices marked as CONN_REPORT for which we do send
6109 * device found events, or advertisement monitoring requested.
6110 */
6111 if (hdev->le_scan_type == LE_SCAN_PASSIVE) {
6112 if (type == LE_ADV_DIRECT_IND)
6113 return;
6114
6115 if (!hci_pend_le_action_lookup(&hdev->pend_le_reports,
6116 bdaddr, bdaddr_type) &&
6117 idr_is_empty(&hdev->adv_monitors_idr))
6118 return;
6119
6120 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6121 rssi, flags, data, len, NULL, 0, 0);
6122 return;
6123 }
6124
6125 /* When receiving a scan response, then there is no way to
6126 * know if the remote device is connectable or not. However
6127 * since scan responses are merged with a previously seen
6128 * advertising report, the flags field from that report
6129 * will be used.
6130 *
6131 * In the unlikely case that a controller just sends a scan
6132 * response event that doesn't match the pending report, then
6133 * it is marked as a standalone SCAN_RSP.
6134 */
6135 if (type == LE_ADV_SCAN_RSP)
6136 flags = MGMT_DEV_FOUND_SCAN_RSP;
6137
6138 /* If there's nothing pending either store the data from this
6139 * event or send an immediate device found event if the data
6140 * should not be stored for later.
6141 */
6142 if (!ext_adv && !has_pending_adv_report(hdev)) {
6143 /* If the report will trigger a SCAN_REQ store it for
6144 * later merging.
6145 */
6146 if (type == LE_ADV_IND || type == LE_ADV_SCAN_IND) {
6147 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6148 rssi, flags, data, len);
6149 return;
6150 }
6151
6152 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6153 rssi, flags, data, len, NULL, 0, 0);
6154 return;
6155 }
6156
6157 /* Check if the pending report is for the same device as the new one */
6158 match = (!bacmp(bdaddr, &d->last_adv_addr) &&
6159 bdaddr_type == d->last_adv_addr_type);
6160
6161 /* If the pending data doesn't match this report or this isn't a
6162 * scan response (e.g. we got a duplicate ADV_IND) then force
6163 * sending of the pending data.
6164 */
6165 if (type != LE_ADV_SCAN_RSP || !match) {
6166 /* Send out whatever is in the cache, but skip duplicates */
6167 if (!match)
6168 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6169 d->last_adv_addr_type, NULL,
6170 d->last_adv_rssi, d->last_adv_flags,
6171 d->last_adv_data,
6172 d->last_adv_data_len, NULL, 0, 0);
6173
6174 /* If the new report will trigger a SCAN_REQ store it for
6175 * later merging.
6176 */
6177 if (!ext_adv && (type == LE_ADV_IND ||
6178 type == LE_ADV_SCAN_IND)) {
6179 store_pending_adv_report(hdev, bdaddr, bdaddr_type,
6180 rssi, flags, data, len);
6181 return;
6182 }
6183
6184 /* The advertising reports cannot be merged, so clear
6185 * the pending report and send out a device found event.
6186 */
6187 clear_pending_adv_report(hdev);
6188 mgmt_device_found(hdev, bdaddr, LE_LINK, bdaddr_type, NULL,
6189 rssi, flags, data, len, NULL, 0, 0);
6190 return;
6191 }
6192
6193 /* If we get here we've got a pending ADV_IND or ADV_SCAN_IND and
6194 * the new event is a SCAN_RSP. We can therefore proceed with
6195 * sending a merged device found event.
6196 */
6197 mgmt_device_found(hdev, &d->last_adv_addr, LE_LINK,
6198 d->last_adv_addr_type, NULL, rssi, d->last_adv_flags,
6199 d->last_adv_data, d->last_adv_data_len, data, len, 0);
6200 clear_pending_adv_report(hdev);
6201 }
6202
hci_le_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6203 static void hci_le_adv_report_evt(struct hci_dev *hdev, void *data,
6204 struct sk_buff *skb)
6205 {
6206 struct hci_ev_le_advertising_report *ev = data;
6207 u64 instant = jiffies;
6208
6209 if (!ev->num)
6210 return;
6211
6212 hci_dev_lock(hdev);
6213
6214 while (ev->num--) {
6215 struct hci_ev_le_advertising_info *info;
6216 s8 rssi;
6217
6218 info = hci_le_ev_skb_pull(hdev, skb,
6219 HCI_EV_LE_ADVERTISING_REPORT,
6220 sizeof(*info));
6221 if (!info)
6222 break;
6223
6224 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_ADVERTISING_REPORT,
6225 info->length + 1))
6226 break;
6227
6228 if (info->length <= max_adv_len(hdev)) {
6229 rssi = info->data[info->length];
6230 process_adv_report(hdev, info->type, &info->bdaddr,
6231 info->bdaddr_type, NULL, 0,
6232 HCI_ADV_PHY_1M, 0, rssi,
6233 info->data, info->length, false,
6234 false, instant);
6235 } else {
6236 bt_dev_err(hdev, "Dropping invalid advertising data");
6237 }
6238 }
6239
6240 hci_dev_unlock(hdev);
6241 }
6242
ext_evt_type_to_legacy(struct hci_dev * hdev,u16 evt_type)6243 static u8 ext_evt_type_to_legacy(struct hci_dev *hdev, u16 evt_type)
6244 {
6245 if (evt_type & LE_EXT_ADV_LEGACY_PDU) {
6246 switch (evt_type) {
6247 case LE_LEGACY_ADV_IND:
6248 return LE_ADV_IND;
6249 case LE_LEGACY_ADV_DIRECT_IND:
6250 return LE_ADV_DIRECT_IND;
6251 case LE_LEGACY_ADV_SCAN_IND:
6252 return LE_ADV_SCAN_IND;
6253 case LE_LEGACY_NONCONN_IND:
6254 return LE_ADV_NONCONN_IND;
6255 case LE_LEGACY_SCAN_RSP_ADV:
6256 case LE_LEGACY_SCAN_RSP_ADV_SCAN:
6257 return LE_ADV_SCAN_RSP;
6258 }
6259
6260 goto invalid;
6261 }
6262
6263 if (evt_type & LE_EXT_ADV_CONN_IND) {
6264 if (evt_type & LE_EXT_ADV_DIRECT_IND)
6265 return LE_ADV_DIRECT_IND;
6266
6267 return LE_ADV_IND;
6268 }
6269
6270 if (evt_type & LE_EXT_ADV_SCAN_RSP)
6271 return LE_ADV_SCAN_RSP;
6272
6273 if (evt_type & LE_EXT_ADV_SCAN_IND)
6274 return LE_ADV_SCAN_IND;
6275
6276 if (evt_type == LE_EXT_ADV_NON_CONN_IND ||
6277 evt_type & LE_EXT_ADV_DIRECT_IND)
6278 return LE_ADV_NONCONN_IND;
6279
6280 invalid:
6281 bt_dev_err_ratelimited(hdev, "Unknown advertising packet type: 0x%02x",
6282 evt_type);
6283
6284 return LE_ADV_INVALID;
6285 }
6286
hci_le_ext_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6287 static void hci_le_ext_adv_report_evt(struct hci_dev *hdev, void *data,
6288 struct sk_buff *skb)
6289 {
6290 struct hci_ev_le_ext_adv_report *ev = data;
6291 u64 instant = jiffies;
6292
6293 if (!ev->num)
6294 return;
6295
6296 hci_dev_lock(hdev);
6297
6298 while (ev->num--) {
6299 struct hci_ev_le_ext_adv_info *info;
6300 u8 legacy_evt_type;
6301 u16 evt_type;
6302
6303 info = hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6304 sizeof(*info));
6305 if (!info)
6306 break;
6307
6308 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_EXT_ADV_REPORT,
6309 info->length))
6310 break;
6311
6312 evt_type = __le16_to_cpu(info->type) & LE_EXT_ADV_EVT_TYPE_MASK;
6313 legacy_evt_type = ext_evt_type_to_legacy(hdev, evt_type);
6314 if (legacy_evt_type != LE_ADV_INVALID) {
6315 process_adv_report(hdev, legacy_evt_type, &info->bdaddr,
6316 info->bdaddr_type, NULL, 0,
6317 info->primary_phy,
6318 info->secondary_phy,
6319 info->rssi, info->data, info->length,
6320 !(evt_type & LE_EXT_ADV_LEGACY_PDU),
6321 false, instant);
6322 }
6323 }
6324
6325 hci_dev_unlock(hdev);
6326 }
6327
hci_le_pa_term_sync(struct hci_dev * hdev,__le16 handle)6328 static int hci_le_pa_term_sync(struct hci_dev *hdev, __le16 handle)
6329 {
6330 struct hci_cp_le_pa_term_sync cp;
6331
6332 memset(&cp, 0, sizeof(cp));
6333 cp.handle = handle;
6334
6335 return hci_send_cmd(hdev, HCI_OP_LE_PA_TERM_SYNC, sizeof(cp), &cp);
6336 }
6337
hci_le_pa_sync_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6338 static void hci_le_pa_sync_estabilished_evt(struct hci_dev *hdev, void *data,
6339 struct sk_buff *skb)
6340 {
6341 struct hci_ev_le_pa_sync_established *ev = data;
6342 int mask = hdev->link_mode;
6343 __u8 flags = 0;
6344 struct hci_conn *pa_sync;
6345
6346 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6347
6348 hci_dev_lock(hdev);
6349
6350 hci_dev_clear_flag(hdev, HCI_PA_SYNC);
6351
6352 mask |= hci_proto_connect_ind(hdev, &ev->bdaddr, ISO_LINK, &flags);
6353 if (!(mask & HCI_LM_ACCEPT)) {
6354 hci_le_pa_term_sync(hdev, ev->handle);
6355 goto unlock;
6356 }
6357
6358 if (!(flags & HCI_PROTO_DEFER))
6359 goto unlock;
6360
6361 /* Add connection to indicate PA sync event */
6362 pa_sync = hci_conn_add_unset(hdev, ISO_LINK, BDADDR_ANY,
6363 HCI_ROLE_SLAVE);
6364
6365 if (IS_ERR(pa_sync))
6366 goto unlock;
6367
6368 pa_sync->sync_handle = le16_to_cpu(ev->handle);
6369
6370 if (ev->status) {
6371 set_bit(HCI_CONN_PA_SYNC_FAILED, &pa_sync->flags);
6372
6373 /* Notify iso layer */
6374 hci_connect_cfm(pa_sync, ev->status);
6375 }
6376
6377 unlock:
6378 hci_dev_unlock(hdev);
6379 }
6380
hci_le_per_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6381 static void hci_le_per_adv_report_evt(struct hci_dev *hdev, void *data,
6382 struct sk_buff *skb)
6383 {
6384 struct hci_ev_le_per_adv_report *ev = data;
6385 int mask = hdev->link_mode;
6386 __u8 flags = 0;
6387 struct hci_conn *pa_sync;
6388
6389 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6390
6391 hci_dev_lock(hdev);
6392
6393 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6394 if (!(mask & HCI_LM_ACCEPT))
6395 goto unlock;
6396
6397 if (!(flags & HCI_PROTO_DEFER))
6398 goto unlock;
6399
6400 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6401 (hdev,
6402 le16_to_cpu(ev->sync_handle));
6403
6404 if (!pa_sync)
6405 goto unlock;
6406
6407 if (ev->data_status == LE_PA_DATA_COMPLETE &&
6408 !test_and_set_bit(HCI_CONN_PA_SYNC, &pa_sync->flags)) {
6409 /* Notify iso layer */
6410 hci_connect_cfm(pa_sync, 0);
6411
6412 /* Notify MGMT layer */
6413 mgmt_device_connected(hdev, pa_sync, NULL, 0);
6414 }
6415
6416 unlock:
6417 hci_dev_unlock(hdev);
6418 }
6419
hci_le_remote_feat_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6420 static void hci_le_remote_feat_complete_evt(struct hci_dev *hdev, void *data,
6421 struct sk_buff *skb)
6422 {
6423 struct hci_ev_le_remote_feat_complete *ev = data;
6424 struct hci_conn *conn;
6425
6426 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6427
6428 hci_dev_lock(hdev);
6429
6430 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6431 if (conn) {
6432 if (!ev->status)
6433 memcpy(conn->features[0], ev->features, 8);
6434
6435 if (conn->state == BT_CONFIG) {
6436 __u8 status;
6437
6438 /* If the local controller supports peripheral-initiated
6439 * features exchange, but the remote controller does
6440 * not, then it is possible that the error code 0x1a
6441 * for unsupported remote feature gets returned.
6442 *
6443 * In this specific case, allow the connection to
6444 * transition into connected state and mark it as
6445 * successful.
6446 */
6447 if (!conn->out && ev->status == HCI_ERROR_UNSUPPORTED_REMOTE_FEATURE &&
6448 (hdev->le_features[0] & HCI_LE_PERIPHERAL_FEATURES))
6449 status = 0x00;
6450 else
6451 status = ev->status;
6452
6453 conn->state = BT_CONNECTED;
6454 hci_connect_cfm(conn, status);
6455 hci_conn_drop(conn);
6456 }
6457 }
6458
6459 hci_dev_unlock(hdev);
6460 }
6461
hci_le_ltk_request_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6462 static void hci_le_ltk_request_evt(struct hci_dev *hdev, void *data,
6463 struct sk_buff *skb)
6464 {
6465 struct hci_ev_le_ltk_req *ev = data;
6466 struct hci_cp_le_ltk_reply cp;
6467 struct hci_cp_le_ltk_neg_reply neg;
6468 struct hci_conn *conn;
6469 struct smp_ltk *ltk;
6470
6471 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6472
6473 hci_dev_lock(hdev);
6474
6475 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6476 if (conn == NULL)
6477 goto not_found;
6478
6479 ltk = hci_find_ltk(hdev, &conn->dst, conn->dst_type, conn->role);
6480 if (!ltk)
6481 goto not_found;
6482
6483 if (smp_ltk_is_sc(ltk)) {
6484 /* With SC both EDiv and Rand are set to zero */
6485 if (ev->ediv || ev->rand)
6486 goto not_found;
6487 } else {
6488 /* For non-SC keys check that EDiv and Rand match */
6489 if (ev->ediv != ltk->ediv || ev->rand != ltk->rand)
6490 goto not_found;
6491 }
6492
6493 memcpy(cp.ltk, ltk->val, ltk->enc_size);
6494 memset(cp.ltk + ltk->enc_size, 0, sizeof(cp.ltk) - ltk->enc_size);
6495 cp.handle = cpu_to_le16(conn->handle);
6496
6497 conn->pending_sec_level = smp_ltk_sec_level(ltk);
6498
6499 conn->enc_key_size = ltk->enc_size;
6500
6501 hci_send_cmd(hdev, HCI_OP_LE_LTK_REPLY, sizeof(cp), &cp);
6502
6503 /* Ref. Bluetooth Core SPEC pages 1975 and 2004. STK is a
6504 * temporary key used to encrypt a connection following
6505 * pairing. It is used during the Encrypted Session Setup to
6506 * distribute the keys. Later, security can be re-established
6507 * using a distributed LTK.
6508 */
6509 if (ltk->type == SMP_STK) {
6510 set_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6511 list_del_rcu(<k->list);
6512 kfree_rcu(ltk, rcu);
6513 } else {
6514 clear_bit(HCI_CONN_STK_ENCRYPT, &conn->flags);
6515 }
6516
6517 hci_dev_unlock(hdev);
6518
6519 return;
6520
6521 not_found:
6522 neg.handle = ev->handle;
6523 hci_send_cmd(hdev, HCI_OP_LE_LTK_NEG_REPLY, sizeof(neg), &neg);
6524 hci_dev_unlock(hdev);
6525 }
6526
send_conn_param_neg_reply(struct hci_dev * hdev,u16 handle,u8 reason)6527 static void send_conn_param_neg_reply(struct hci_dev *hdev, u16 handle,
6528 u8 reason)
6529 {
6530 struct hci_cp_le_conn_param_req_neg_reply cp;
6531
6532 cp.handle = cpu_to_le16(handle);
6533 cp.reason = reason;
6534
6535 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_NEG_REPLY, sizeof(cp),
6536 &cp);
6537 }
6538
hci_le_remote_conn_param_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6539 static void hci_le_remote_conn_param_req_evt(struct hci_dev *hdev, void *data,
6540 struct sk_buff *skb)
6541 {
6542 struct hci_ev_le_remote_conn_param_req *ev = data;
6543 struct hci_cp_le_conn_param_req_reply cp;
6544 struct hci_conn *hcon;
6545 u16 handle, min, max, latency, timeout;
6546
6547 bt_dev_dbg(hdev, "handle 0x%4.4x", __le16_to_cpu(ev->handle));
6548
6549 handle = le16_to_cpu(ev->handle);
6550 min = le16_to_cpu(ev->interval_min);
6551 max = le16_to_cpu(ev->interval_max);
6552 latency = le16_to_cpu(ev->latency);
6553 timeout = le16_to_cpu(ev->timeout);
6554
6555 hcon = hci_conn_hash_lookup_handle(hdev, handle);
6556 if (!hcon || hcon->state != BT_CONNECTED)
6557 return send_conn_param_neg_reply(hdev, handle,
6558 HCI_ERROR_UNKNOWN_CONN_ID);
6559
6560 if (max > hcon->le_conn_max_interval)
6561 return send_conn_param_neg_reply(hdev, handle,
6562 HCI_ERROR_INVALID_LL_PARAMS);
6563
6564 if (hci_check_conn_params(min, max, latency, timeout))
6565 return send_conn_param_neg_reply(hdev, handle,
6566 HCI_ERROR_INVALID_LL_PARAMS);
6567
6568 if (hcon->role == HCI_ROLE_MASTER) {
6569 struct hci_conn_params *params;
6570 u8 store_hint;
6571
6572 hci_dev_lock(hdev);
6573
6574 params = hci_conn_params_lookup(hdev, &hcon->dst,
6575 hcon->dst_type);
6576 if (params) {
6577 params->conn_min_interval = min;
6578 params->conn_max_interval = max;
6579 params->conn_latency = latency;
6580 params->supervision_timeout = timeout;
6581 store_hint = 0x01;
6582 } else {
6583 store_hint = 0x00;
6584 }
6585
6586 hci_dev_unlock(hdev);
6587
6588 mgmt_new_conn_param(hdev, &hcon->dst, hcon->dst_type,
6589 store_hint, min, max, latency, timeout);
6590 }
6591
6592 cp.handle = ev->handle;
6593 cp.interval_min = ev->interval_min;
6594 cp.interval_max = ev->interval_max;
6595 cp.latency = ev->latency;
6596 cp.timeout = ev->timeout;
6597 cp.min_ce_len = 0;
6598 cp.max_ce_len = 0;
6599
6600 hci_send_cmd(hdev, HCI_OP_LE_CONN_PARAM_REQ_REPLY, sizeof(cp), &cp);
6601 }
6602
hci_le_direct_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6603 static void hci_le_direct_adv_report_evt(struct hci_dev *hdev, void *data,
6604 struct sk_buff *skb)
6605 {
6606 struct hci_ev_le_direct_adv_report *ev = data;
6607 u64 instant = jiffies;
6608 int i;
6609
6610 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EV_LE_DIRECT_ADV_REPORT,
6611 flex_array_size(ev, info, ev->num)))
6612 return;
6613
6614 if (!ev->num)
6615 return;
6616
6617 hci_dev_lock(hdev);
6618
6619 for (i = 0; i < ev->num; i++) {
6620 struct hci_ev_le_direct_adv_info *info = &ev->info[i];
6621
6622 process_adv_report(hdev, info->type, &info->bdaddr,
6623 info->bdaddr_type, &info->direct_addr,
6624 info->direct_addr_type, HCI_ADV_PHY_1M, 0,
6625 info->rssi, NULL, 0, false, false, instant);
6626 }
6627
6628 hci_dev_unlock(hdev);
6629 }
6630
hci_le_phy_update_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6631 static void hci_le_phy_update_evt(struct hci_dev *hdev, void *data,
6632 struct sk_buff *skb)
6633 {
6634 struct hci_ev_le_phy_update_complete *ev = data;
6635 struct hci_conn *conn;
6636
6637 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6638
6639 if (ev->status)
6640 return;
6641
6642 hci_dev_lock(hdev);
6643
6644 conn = hci_conn_hash_lookup_handle(hdev, __le16_to_cpu(ev->handle));
6645 if (!conn)
6646 goto unlock;
6647
6648 conn->le_tx_phy = ev->tx_phy;
6649 conn->le_rx_phy = ev->rx_phy;
6650
6651 unlock:
6652 hci_dev_unlock(hdev);
6653 }
6654
hci_le_cis_estabilished_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6655 static void hci_le_cis_estabilished_evt(struct hci_dev *hdev, void *data,
6656 struct sk_buff *skb)
6657 {
6658 struct hci_evt_le_cis_established *ev = data;
6659 struct hci_conn *conn;
6660 struct bt_iso_qos *qos;
6661 bool pending = false;
6662 u16 handle = __le16_to_cpu(ev->handle);
6663
6664 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6665
6666 hci_dev_lock(hdev);
6667
6668 conn = hci_conn_hash_lookup_handle(hdev, handle);
6669 if (!conn) {
6670 bt_dev_err(hdev,
6671 "Unable to find connection with handle 0x%4.4x",
6672 handle);
6673 goto unlock;
6674 }
6675
6676 if (conn->type != ISO_LINK) {
6677 bt_dev_err(hdev,
6678 "Invalid connection link type handle 0x%4.4x",
6679 handle);
6680 goto unlock;
6681 }
6682
6683 qos = &conn->iso_qos;
6684
6685 pending = test_and_clear_bit(HCI_CONN_CREATE_CIS, &conn->flags);
6686
6687 /* Convert ISO Interval (1.25 ms slots) to SDU Interval (us) */
6688 qos->ucast.in.interval = le16_to_cpu(ev->interval) * 1250;
6689 qos->ucast.out.interval = qos->ucast.in.interval;
6690
6691 switch (conn->role) {
6692 case HCI_ROLE_SLAVE:
6693 /* Convert Transport Latency (us) to Latency (msec) */
6694 qos->ucast.in.latency =
6695 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6696 1000);
6697 qos->ucast.out.latency =
6698 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6699 1000);
6700 qos->ucast.in.sdu = le16_to_cpu(ev->c_mtu);
6701 qos->ucast.out.sdu = le16_to_cpu(ev->p_mtu);
6702 qos->ucast.in.phy = ev->c_phy;
6703 qos->ucast.out.phy = ev->p_phy;
6704 break;
6705 case HCI_ROLE_MASTER:
6706 /* Convert Transport Latency (us) to Latency (msec) */
6707 qos->ucast.out.latency =
6708 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->c_latency),
6709 1000);
6710 qos->ucast.in.latency =
6711 DIV_ROUND_CLOSEST(get_unaligned_le24(ev->p_latency),
6712 1000);
6713 qos->ucast.out.sdu = le16_to_cpu(ev->c_mtu);
6714 qos->ucast.in.sdu = le16_to_cpu(ev->p_mtu);
6715 qos->ucast.out.phy = ev->c_phy;
6716 qos->ucast.in.phy = ev->p_phy;
6717 break;
6718 }
6719
6720 if (!ev->status) {
6721 conn->state = BT_CONNECTED;
6722 hci_debugfs_create_conn(conn);
6723 hci_conn_add_sysfs(conn);
6724 hci_iso_setup_path(conn);
6725 goto unlock;
6726 }
6727
6728 conn->state = BT_CLOSED;
6729 hci_connect_cfm(conn, ev->status);
6730 hci_conn_del(conn);
6731
6732 unlock:
6733 if (pending)
6734 hci_le_create_cis_pending(hdev);
6735
6736 hci_dev_unlock(hdev);
6737 }
6738
hci_le_reject_cis(struct hci_dev * hdev,__le16 handle)6739 static void hci_le_reject_cis(struct hci_dev *hdev, __le16 handle)
6740 {
6741 struct hci_cp_le_reject_cis cp;
6742
6743 memset(&cp, 0, sizeof(cp));
6744 cp.handle = handle;
6745 cp.reason = HCI_ERROR_REJ_BAD_ADDR;
6746 hci_send_cmd(hdev, HCI_OP_LE_REJECT_CIS, sizeof(cp), &cp);
6747 }
6748
hci_le_accept_cis(struct hci_dev * hdev,__le16 handle)6749 static void hci_le_accept_cis(struct hci_dev *hdev, __le16 handle)
6750 {
6751 struct hci_cp_le_accept_cis cp;
6752
6753 memset(&cp, 0, sizeof(cp));
6754 cp.handle = handle;
6755 hci_send_cmd(hdev, HCI_OP_LE_ACCEPT_CIS, sizeof(cp), &cp);
6756 }
6757
hci_le_cis_req_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6758 static void hci_le_cis_req_evt(struct hci_dev *hdev, void *data,
6759 struct sk_buff *skb)
6760 {
6761 struct hci_evt_le_cis_req *ev = data;
6762 u16 acl_handle, cis_handle;
6763 struct hci_conn *acl, *cis;
6764 int mask;
6765 __u8 flags = 0;
6766
6767 acl_handle = __le16_to_cpu(ev->acl_handle);
6768 cis_handle = __le16_to_cpu(ev->cis_handle);
6769
6770 bt_dev_dbg(hdev, "acl 0x%4.4x handle 0x%4.4x cig 0x%2.2x cis 0x%2.2x",
6771 acl_handle, cis_handle, ev->cig_id, ev->cis_id);
6772
6773 hci_dev_lock(hdev);
6774
6775 acl = hci_conn_hash_lookup_handle(hdev, acl_handle);
6776 if (!acl)
6777 goto unlock;
6778
6779 mask = hci_proto_connect_ind(hdev, &acl->dst, ISO_LINK, &flags);
6780 if (!(mask & HCI_LM_ACCEPT)) {
6781 hci_le_reject_cis(hdev, ev->cis_handle);
6782 goto unlock;
6783 }
6784
6785 cis = hci_conn_hash_lookup_handle(hdev, cis_handle);
6786 if (!cis) {
6787 cis = hci_conn_add(hdev, ISO_LINK, &acl->dst, HCI_ROLE_SLAVE,
6788 cis_handle);
6789 if (IS_ERR(cis)) {
6790 hci_le_reject_cis(hdev, ev->cis_handle);
6791 goto unlock;
6792 }
6793 }
6794
6795 cis->iso_qos.ucast.cig = ev->cig_id;
6796 cis->iso_qos.ucast.cis = ev->cis_id;
6797
6798 if (!(flags & HCI_PROTO_DEFER)) {
6799 hci_le_accept_cis(hdev, ev->cis_handle);
6800 } else {
6801 cis->state = BT_CONNECT2;
6802 hci_connect_cfm(cis, 0);
6803 }
6804
6805 unlock:
6806 hci_dev_unlock(hdev);
6807 }
6808
hci_iso_term_big_sync(struct hci_dev * hdev,void * data)6809 static int hci_iso_term_big_sync(struct hci_dev *hdev, void *data)
6810 {
6811 u8 handle = PTR_UINT(data);
6812
6813 return hci_le_terminate_big_sync(hdev, handle,
6814 HCI_ERROR_LOCAL_HOST_TERM);
6815 }
6816
hci_le_create_big_complete_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6817 static void hci_le_create_big_complete_evt(struct hci_dev *hdev, void *data,
6818 struct sk_buff *skb)
6819 {
6820 struct hci_evt_le_create_big_complete *ev = data;
6821 struct hci_conn *conn;
6822 __u8 i = 0;
6823
6824 BT_DBG("%s status 0x%2.2x", hdev->name, ev->status);
6825
6826 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_CREATE_BIG_COMPLETE,
6827 flex_array_size(ev, bis_handle, ev->num_bis)))
6828 return;
6829
6830 hci_dev_lock(hdev);
6831 rcu_read_lock();
6832
6833 /* Connect all BISes that are bound to the BIG */
6834 list_for_each_entry_rcu(conn, &hdev->conn_hash.list, list) {
6835 if (bacmp(&conn->dst, BDADDR_ANY) ||
6836 conn->type != ISO_LINK ||
6837 conn->iso_qos.bcast.big != ev->handle)
6838 continue;
6839
6840 if (hci_conn_set_handle(conn,
6841 __le16_to_cpu(ev->bis_handle[i++])))
6842 continue;
6843
6844 if (!ev->status) {
6845 conn->state = BT_CONNECTED;
6846 set_bit(HCI_CONN_BIG_CREATED, &conn->flags);
6847 rcu_read_unlock();
6848 hci_debugfs_create_conn(conn);
6849 hci_conn_add_sysfs(conn);
6850 hci_iso_setup_path(conn);
6851 rcu_read_lock();
6852 continue;
6853 }
6854
6855 hci_connect_cfm(conn, ev->status);
6856 rcu_read_unlock();
6857 hci_conn_del(conn);
6858 rcu_read_lock();
6859 }
6860
6861 rcu_read_unlock();
6862
6863 if (!ev->status && !i)
6864 /* If no BISes have been connected for the BIG,
6865 * terminate. This is in case all bound connections
6866 * have been closed before the BIG creation
6867 * has completed.
6868 */
6869 hci_cmd_sync_queue(hdev, hci_iso_term_big_sync,
6870 UINT_PTR(ev->handle), NULL);
6871
6872 hci_dev_unlock(hdev);
6873 }
6874
hci_le_big_sync_established_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6875 static void hci_le_big_sync_established_evt(struct hci_dev *hdev, void *data,
6876 struct sk_buff *skb)
6877 {
6878 struct hci_evt_le_big_sync_estabilished *ev = data;
6879 struct hci_conn *bis;
6880 int i;
6881
6882 bt_dev_dbg(hdev, "status 0x%2.2x", ev->status);
6883
6884 if (!hci_le_ev_skb_pull(hdev, skb, HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
6885 flex_array_size(ev, bis, ev->num_bis)))
6886 return;
6887
6888 hci_dev_lock(hdev);
6889
6890 for (i = 0; i < ev->num_bis; i++) {
6891 u16 handle = le16_to_cpu(ev->bis[i]);
6892 __le32 interval;
6893
6894 bis = hci_conn_hash_lookup_handle(hdev, handle);
6895 if (!bis) {
6896 bis = hci_conn_add(hdev, ISO_LINK, BDADDR_ANY,
6897 HCI_ROLE_SLAVE, handle);
6898 if (IS_ERR(bis))
6899 continue;
6900 }
6901
6902 if (ev->status != 0x42)
6903 /* Mark PA sync as established */
6904 set_bit(HCI_CONN_PA_SYNC, &bis->flags);
6905
6906 bis->iso_qos.bcast.big = ev->handle;
6907 memset(&interval, 0, sizeof(interval));
6908 memcpy(&interval, ev->latency, sizeof(ev->latency));
6909 bis->iso_qos.bcast.in.interval = le32_to_cpu(interval);
6910 /* Convert ISO Interval (1.25 ms slots) to latency (ms) */
6911 bis->iso_qos.bcast.in.latency = le16_to_cpu(ev->interval) * 125 / 100;
6912 bis->iso_qos.bcast.in.sdu = le16_to_cpu(ev->max_pdu);
6913
6914 if (!ev->status) {
6915 set_bit(HCI_CONN_BIG_SYNC, &bis->flags);
6916 hci_iso_setup_path(bis);
6917 }
6918 }
6919
6920 /* In case BIG sync failed, notify each failed connection to
6921 * the user after all hci connections have been added
6922 */
6923 if (ev->status)
6924 for (i = 0; i < ev->num_bis; i++) {
6925 u16 handle = le16_to_cpu(ev->bis[i]);
6926
6927 bis = hci_conn_hash_lookup_handle(hdev, handle);
6928 if (!bis)
6929 continue;
6930
6931 set_bit(HCI_CONN_BIG_SYNC_FAILED, &bis->flags);
6932 hci_connect_cfm(bis, ev->status);
6933 }
6934
6935 hci_dev_unlock(hdev);
6936 }
6937
hci_le_big_info_adv_report_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb)6938 static void hci_le_big_info_adv_report_evt(struct hci_dev *hdev, void *data,
6939 struct sk_buff *skb)
6940 {
6941 struct hci_evt_le_big_info_adv_report *ev = data;
6942 int mask = hdev->link_mode;
6943 __u8 flags = 0;
6944 struct hci_conn *pa_sync;
6945
6946 bt_dev_dbg(hdev, "sync_handle 0x%4.4x", le16_to_cpu(ev->sync_handle));
6947
6948 hci_dev_lock(hdev);
6949
6950 mask |= hci_proto_connect_ind(hdev, BDADDR_ANY, ISO_LINK, &flags);
6951 if (!(mask & HCI_LM_ACCEPT))
6952 goto unlock;
6953
6954 if (!(flags & HCI_PROTO_DEFER))
6955 goto unlock;
6956
6957 pa_sync = hci_conn_hash_lookup_pa_sync_handle
6958 (hdev,
6959 le16_to_cpu(ev->sync_handle));
6960
6961 if (!pa_sync)
6962 goto unlock;
6963
6964 /* Notify iso layer */
6965 hci_connect_cfm(pa_sync, 0);
6966
6967 unlock:
6968 hci_dev_unlock(hdev);
6969 }
6970
6971 #define HCI_LE_EV_VL(_op, _func, _min_len, _max_len) \
6972 [_op] = { \
6973 .func = _func, \
6974 .min_len = _min_len, \
6975 .max_len = _max_len, \
6976 }
6977
6978 #define HCI_LE_EV(_op, _func, _len) \
6979 HCI_LE_EV_VL(_op, _func, _len, _len)
6980
6981 #define HCI_LE_EV_STATUS(_op, _func) \
6982 HCI_LE_EV(_op, _func, sizeof(struct hci_ev_status))
6983
6984 /* Entries in this table shall have their position according to the subevent
6985 * opcode they handle so the use of the macros above is recommend since it does
6986 * attempt to initialize at its proper index using Designated Initializers that
6987 * way events without a callback function can be ommited.
6988 */
6989 static const struct hci_le_ev {
6990 void (*func)(struct hci_dev *hdev, void *data, struct sk_buff *skb);
6991 u16 min_len;
6992 u16 max_len;
6993 } hci_le_ev_table[U8_MAX + 1] = {
6994 /* [0x01 = HCI_EV_LE_CONN_COMPLETE] */
6995 HCI_LE_EV(HCI_EV_LE_CONN_COMPLETE, hci_le_conn_complete_evt,
6996 sizeof(struct hci_ev_le_conn_complete)),
6997 /* [0x02 = HCI_EV_LE_ADVERTISING_REPORT] */
6998 HCI_LE_EV_VL(HCI_EV_LE_ADVERTISING_REPORT, hci_le_adv_report_evt,
6999 sizeof(struct hci_ev_le_advertising_report),
7000 HCI_MAX_EVENT_SIZE),
7001 /* [0x03 = HCI_EV_LE_CONN_UPDATE_COMPLETE] */
7002 HCI_LE_EV(HCI_EV_LE_CONN_UPDATE_COMPLETE,
7003 hci_le_conn_update_complete_evt,
7004 sizeof(struct hci_ev_le_conn_update_complete)),
7005 /* [0x04 = HCI_EV_LE_REMOTE_FEAT_COMPLETE] */
7006 HCI_LE_EV(HCI_EV_LE_REMOTE_FEAT_COMPLETE,
7007 hci_le_remote_feat_complete_evt,
7008 sizeof(struct hci_ev_le_remote_feat_complete)),
7009 /* [0x05 = HCI_EV_LE_LTK_REQ] */
7010 HCI_LE_EV(HCI_EV_LE_LTK_REQ, hci_le_ltk_request_evt,
7011 sizeof(struct hci_ev_le_ltk_req)),
7012 /* [0x06 = HCI_EV_LE_REMOTE_CONN_PARAM_REQ] */
7013 HCI_LE_EV(HCI_EV_LE_REMOTE_CONN_PARAM_REQ,
7014 hci_le_remote_conn_param_req_evt,
7015 sizeof(struct hci_ev_le_remote_conn_param_req)),
7016 /* [0x0a = HCI_EV_LE_ENHANCED_CONN_COMPLETE] */
7017 HCI_LE_EV(HCI_EV_LE_ENHANCED_CONN_COMPLETE,
7018 hci_le_enh_conn_complete_evt,
7019 sizeof(struct hci_ev_le_enh_conn_complete)),
7020 /* [0x0b = HCI_EV_LE_DIRECT_ADV_REPORT] */
7021 HCI_LE_EV_VL(HCI_EV_LE_DIRECT_ADV_REPORT, hci_le_direct_adv_report_evt,
7022 sizeof(struct hci_ev_le_direct_adv_report),
7023 HCI_MAX_EVENT_SIZE),
7024 /* [0x0c = HCI_EV_LE_PHY_UPDATE_COMPLETE] */
7025 HCI_LE_EV(HCI_EV_LE_PHY_UPDATE_COMPLETE, hci_le_phy_update_evt,
7026 sizeof(struct hci_ev_le_phy_update_complete)),
7027 /* [0x0d = HCI_EV_LE_EXT_ADV_REPORT] */
7028 HCI_LE_EV_VL(HCI_EV_LE_EXT_ADV_REPORT, hci_le_ext_adv_report_evt,
7029 sizeof(struct hci_ev_le_ext_adv_report),
7030 HCI_MAX_EVENT_SIZE),
7031 /* [0x0e = HCI_EV_LE_PA_SYNC_ESTABLISHED] */
7032 HCI_LE_EV(HCI_EV_LE_PA_SYNC_ESTABLISHED,
7033 hci_le_pa_sync_estabilished_evt,
7034 sizeof(struct hci_ev_le_pa_sync_established)),
7035 /* [0x0f = HCI_EV_LE_PER_ADV_REPORT] */
7036 HCI_LE_EV_VL(HCI_EV_LE_PER_ADV_REPORT,
7037 hci_le_per_adv_report_evt,
7038 sizeof(struct hci_ev_le_per_adv_report),
7039 HCI_MAX_EVENT_SIZE),
7040 /* [0x12 = HCI_EV_LE_EXT_ADV_SET_TERM] */
7041 HCI_LE_EV(HCI_EV_LE_EXT_ADV_SET_TERM, hci_le_ext_adv_term_evt,
7042 sizeof(struct hci_evt_le_ext_adv_set_term)),
7043 /* [0x19 = HCI_EVT_LE_CIS_ESTABLISHED] */
7044 HCI_LE_EV(HCI_EVT_LE_CIS_ESTABLISHED, hci_le_cis_estabilished_evt,
7045 sizeof(struct hci_evt_le_cis_established)),
7046 /* [0x1a = HCI_EVT_LE_CIS_REQ] */
7047 HCI_LE_EV(HCI_EVT_LE_CIS_REQ, hci_le_cis_req_evt,
7048 sizeof(struct hci_evt_le_cis_req)),
7049 /* [0x1b = HCI_EVT_LE_CREATE_BIG_COMPLETE] */
7050 HCI_LE_EV_VL(HCI_EVT_LE_CREATE_BIG_COMPLETE,
7051 hci_le_create_big_complete_evt,
7052 sizeof(struct hci_evt_le_create_big_complete),
7053 HCI_MAX_EVENT_SIZE),
7054 /* [0x1d = HCI_EV_LE_BIG_SYNC_ESTABILISHED] */
7055 HCI_LE_EV_VL(HCI_EVT_LE_BIG_SYNC_ESTABILISHED,
7056 hci_le_big_sync_established_evt,
7057 sizeof(struct hci_evt_le_big_sync_estabilished),
7058 HCI_MAX_EVENT_SIZE),
7059 /* [0x22 = HCI_EVT_LE_BIG_INFO_ADV_REPORT] */
7060 HCI_LE_EV_VL(HCI_EVT_LE_BIG_INFO_ADV_REPORT,
7061 hci_le_big_info_adv_report_evt,
7062 sizeof(struct hci_evt_le_big_info_adv_report),
7063 HCI_MAX_EVENT_SIZE),
7064 };
7065
hci_le_meta_evt(struct hci_dev * hdev,void * data,struct sk_buff * skb,u16 * opcode,u8 * status,hci_req_complete_t * req_complete,hci_req_complete_skb_t * req_complete_skb)7066 static void hci_le_meta_evt(struct hci_dev *hdev, void *data,
7067 struct sk_buff *skb, u16 *opcode, u8 *status,
7068 hci_req_complete_t *req_complete,
7069 hci_req_complete_skb_t *req_complete_skb)
7070 {
7071 struct hci_ev_le_meta *ev = data;
7072 const struct hci_le_ev *subev;
7073
7074 bt_dev_dbg(hdev, "subevent 0x%2.2x", ev->subevent);
7075
7076 /* Only match event if command OGF is for LE */
7077 if (hdev->req_skb &&
7078 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) == 0x08 &&
7079 hci_skb_event(hdev->req_skb) == ev->subevent) {
7080 *opcode = hci_skb_opcode(hdev->req_skb);
7081 hci_req_cmd_complete(hdev, *opcode, 0x00, req_complete,
7082 req_complete_skb);
7083 }
7084
7085 subev = &hci_le_ev_table[ev->subevent];
7086 if (!subev->func)
7087 return;
7088
7089 if (skb->len < subev->min_len) {
7090 bt_dev_err(hdev, "unexpected subevent 0x%2.2x length: %u < %u",
7091 ev->subevent, skb->len, subev->min_len);
7092 return;
7093 }
7094
7095 /* Just warn if the length is over max_len size it still be
7096 * possible to partially parse the event so leave to callback to
7097 * decide if that is acceptable.
7098 */
7099 if (skb->len > subev->max_len)
7100 bt_dev_warn(hdev, "unexpected subevent 0x%2.2x length: %u > %u",
7101 ev->subevent, skb->len, subev->max_len);
7102 data = hci_le_ev_skb_pull(hdev, skb, ev->subevent, subev->min_len);
7103 if (!data)
7104 return;
7105
7106 subev->func(hdev, data, skb);
7107 }
7108
hci_get_cmd_complete(struct hci_dev * hdev,u16 opcode,u8 event,struct sk_buff * skb)7109 static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
7110 u8 event, struct sk_buff *skb)
7111 {
7112 struct hci_ev_cmd_complete *ev;
7113 struct hci_event_hdr *hdr;
7114
7115 if (!skb)
7116 return false;
7117
7118 hdr = hci_ev_skb_pull(hdev, skb, event, sizeof(*hdr));
7119 if (!hdr)
7120 return false;
7121
7122 if (event) {
7123 if (hdr->evt != event)
7124 return false;
7125 return true;
7126 }
7127
7128 /* Check if request ended in Command Status - no way to retrieve
7129 * any extra parameters in this case.
7130 */
7131 if (hdr->evt == HCI_EV_CMD_STATUS)
7132 return false;
7133
7134 if (hdr->evt != HCI_EV_CMD_COMPLETE) {
7135 bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
7136 hdr->evt);
7137 return false;
7138 }
7139
7140 ev = hci_cc_skb_pull(hdev, skb, opcode, sizeof(*ev));
7141 if (!ev)
7142 return false;
7143
7144 if (opcode != __le16_to_cpu(ev->opcode)) {
7145 BT_DBG("opcode doesn't match (0x%2.2x != 0x%2.2x)", opcode,
7146 __le16_to_cpu(ev->opcode));
7147 return false;
7148 }
7149
7150 return true;
7151 }
7152
hci_store_wake_reason(struct hci_dev * hdev,u8 event,struct sk_buff * skb)7153 static void hci_store_wake_reason(struct hci_dev *hdev, u8 event,
7154 struct sk_buff *skb)
7155 {
7156 struct hci_ev_le_advertising_info *adv;
7157 struct hci_ev_le_direct_adv_info *direct_adv;
7158 struct hci_ev_le_ext_adv_info *ext_adv;
7159 const struct hci_ev_conn_complete *conn_complete = (void *)skb->data;
7160 const struct hci_ev_conn_request *conn_request = (void *)skb->data;
7161
7162 hci_dev_lock(hdev);
7163
7164 /* If we are currently suspended and this is the first BT event seen,
7165 * save the wake reason associated with the event.
7166 */
7167 if (!hdev->suspended || hdev->wake_reason)
7168 goto unlock;
7169
7170 /* Default to remote wake. Values for wake_reason are documented in the
7171 * Bluez mgmt api docs.
7172 */
7173 hdev->wake_reason = MGMT_WAKE_REASON_REMOTE_WAKE;
7174
7175 /* Once configured for remote wakeup, we should only wake up for
7176 * reconnections. It's useful to see which device is waking us up so
7177 * keep track of the bdaddr of the connection event that woke us up.
7178 */
7179 if (event == HCI_EV_CONN_REQUEST) {
7180 bacpy(&hdev->wake_addr, &conn_request->bdaddr);
7181 hdev->wake_addr_type = BDADDR_BREDR;
7182 } else if (event == HCI_EV_CONN_COMPLETE) {
7183 bacpy(&hdev->wake_addr, &conn_complete->bdaddr);
7184 hdev->wake_addr_type = BDADDR_BREDR;
7185 } else if (event == HCI_EV_LE_META) {
7186 struct hci_ev_le_meta *le_ev = (void *)skb->data;
7187 u8 subevent = le_ev->subevent;
7188 u8 *ptr = &skb->data[sizeof(*le_ev)];
7189 u8 num_reports = *ptr;
7190
7191 if ((subevent == HCI_EV_LE_ADVERTISING_REPORT ||
7192 subevent == HCI_EV_LE_DIRECT_ADV_REPORT ||
7193 subevent == HCI_EV_LE_EXT_ADV_REPORT) &&
7194 num_reports) {
7195 adv = (void *)(ptr + 1);
7196 direct_adv = (void *)(ptr + 1);
7197 ext_adv = (void *)(ptr + 1);
7198
7199 switch (subevent) {
7200 case HCI_EV_LE_ADVERTISING_REPORT:
7201 bacpy(&hdev->wake_addr, &adv->bdaddr);
7202 hdev->wake_addr_type = adv->bdaddr_type;
7203 break;
7204 case HCI_EV_LE_DIRECT_ADV_REPORT:
7205 bacpy(&hdev->wake_addr, &direct_adv->bdaddr);
7206 hdev->wake_addr_type = direct_adv->bdaddr_type;
7207 break;
7208 case HCI_EV_LE_EXT_ADV_REPORT:
7209 bacpy(&hdev->wake_addr, &ext_adv->bdaddr);
7210 hdev->wake_addr_type = ext_adv->bdaddr_type;
7211 break;
7212 }
7213 }
7214 } else {
7215 hdev->wake_reason = MGMT_WAKE_REASON_UNEXPECTED;
7216 }
7217
7218 unlock:
7219 hci_dev_unlock(hdev);
7220 }
7221
7222 #define HCI_EV_VL(_op, _func, _min_len, _max_len) \
7223 [_op] = { \
7224 .req = false, \
7225 .func = _func, \
7226 .min_len = _min_len, \
7227 .max_len = _max_len, \
7228 }
7229
7230 #define HCI_EV(_op, _func, _len) \
7231 HCI_EV_VL(_op, _func, _len, _len)
7232
7233 #define HCI_EV_STATUS(_op, _func) \
7234 HCI_EV(_op, _func, sizeof(struct hci_ev_status))
7235
7236 #define HCI_EV_REQ_VL(_op, _func, _min_len, _max_len) \
7237 [_op] = { \
7238 .req = true, \
7239 .func_req = _func, \
7240 .min_len = _min_len, \
7241 .max_len = _max_len, \
7242 }
7243
7244 #define HCI_EV_REQ(_op, _func, _len) \
7245 HCI_EV_REQ_VL(_op, _func, _len, _len)
7246
7247 /* Entries in this table shall have their position according to the event opcode
7248 * they handle so the use of the macros above is recommend since it does attempt
7249 * to initialize at its proper index using Designated Initializers that way
7250 * events without a callback function don't have entered.
7251 */
7252 static const struct hci_ev {
7253 bool req;
7254 union {
7255 void (*func)(struct hci_dev *hdev, void *data,
7256 struct sk_buff *skb);
7257 void (*func_req)(struct hci_dev *hdev, void *data,
7258 struct sk_buff *skb, u16 *opcode, u8 *status,
7259 hci_req_complete_t *req_complete,
7260 hci_req_complete_skb_t *req_complete_skb);
7261 };
7262 u16 min_len;
7263 u16 max_len;
7264 } hci_ev_table[U8_MAX + 1] = {
7265 /* [0x01 = HCI_EV_INQUIRY_COMPLETE] */
7266 HCI_EV_STATUS(HCI_EV_INQUIRY_COMPLETE, hci_inquiry_complete_evt),
7267 /* [0x02 = HCI_EV_INQUIRY_RESULT] */
7268 HCI_EV_VL(HCI_EV_INQUIRY_RESULT, hci_inquiry_result_evt,
7269 sizeof(struct hci_ev_inquiry_result), HCI_MAX_EVENT_SIZE),
7270 /* [0x03 = HCI_EV_CONN_COMPLETE] */
7271 HCI_EV(HCI_EV_CONN_COMPLETE, hci_conn_complete_evt,
7272 sizeof(struct hci_ev_conn_complete)),
7273 /* [0x04 = HCI_EV_CONN_REQUEST] */
7274 HCI_EV(HCI_EV_CONN_REQUEST, hci_conn_request_evt,
7275 sizeof(struct hci_ev_conn_request)),
7276 /* [0x05 = HCI_EV_DISCONN_COMPLETE] */
7277 HCI_EV(HCI_EV_DISCONN_COMPLETE, hci_disconn_complete_evt,
7278 sizeof(struct hci_ev_disconn_complete)),
7279 /* [0x06 = HCI_EV_AUTH_COMPLETE] */
7280 HCI_EV(HCI_EV_AUTH_COMPLETE, hci_auth_complete_evt,
7281 sizeof(struct hci_ev_auth_complete)),
7282 /* [0x07 = HCI_EV_REMOTE_NAME] */
7283 HCI_EV(HCI_EV_REMOTE_NAME, hci_remote_name_evt,
7284 sizeof(struct hci_ev_remote_name)),
7285 /* [0x08 = HCI_EV_ENCRYPT_CHANGE] */
7286 HCI_EV(HCI_EV_ENCRYPT_CHANGE, hci_encrypt_change_evt,
7287 sizeof(struct hci_ev_encrypt_change)),
7288 /* [0x09 = HCI_EV_CHANGE_LINK_KEY_COMPLETE] */
7289 HCI_EV(HCI_EV_CHANGE_LINK_KEY_COMPLETE,
7290 hci_change_link_key_complete_evt,
7291 sizeof(struct hci_ev_change_link_key_complete)),
7292 /* [0x0b = HCI_EV_REMOTE_FEATURES] */
7293 HCI_EV(HCI_EV_REMOTE_FEATURES, hci_remote_features_evt,
7294 sizeof(struct hci_ev_remote_features)),
7295 /* [0x0e = HCI_EV_CMD_COMPLETE] */
7296 HCI_EV_REQ_VL(HCI_EV_CMD_COMPLETE, hci_cmd_complete_evt,
7297 sizeof(struct hci_ev_cmd_complete), HCI_MAX_EVENT_SIZE),
7298 /* [0x0f = HCI_EV_CMD_STATUS] */
7299 HCI_EV_REQ(HCI_EV_CMD_STATUS, hci_cmd_status_evt,
7300 sizeof(struct hci_ev_cmd_status)),
7301 /* [0x10 = HCI_EV_CMD_STATUS] */
7302 HCI_EV(HCI_EV_HARDWARE_ERROR, hci_hardware_error_evt,
7303 sizeof(struct hci_ev_hardware_error)),
7304 /* [0x12 = HCI_EV_ROLE_CHANGE] */
7305 HCI_EV(HCI_EV_ROLE_CHANGE, hci_role_change_evt,
7306 sizeof(struct hci_ev_role_change)),
7307 /* [0x13 = HCI_EV_NUM_COMP_PKTS] */
7308 HCI_EV_VL(HCI_EV_NUM_COMP_PKTS, hci_num_comp_pkts_evt,
7309 sizeof(struct hci_ev_num_comp_pkts), HCI_MAX_EVENT_SIZE),
7310 /* [0x14 = HCI_EV_MODE_CHANGE] */
7311 HCI_EV(HCI_EV_MODE_CHANGE, hci_mode_change_evt,
7312 sizeof(struct hci_ev_mode_change)),
7313 /* [0x16 = HCI_EV_PIN_CODE_REQ] */
7314 HCI_EV(HCI_EV_PIN_CODE_REQ, hci_pin_code_request_evt,
7315 sizeof(struct hci_ev_pin_code_req)),
7316 /* [0x17 = HCI_EV_LINK_KEY_REQ] */
7317 HCI_EV(HCI_EV_LINK_KEY_REQ, hci_link_key_request_evt,
7318 sizeof(struct hci_ev_link_key_req)),
7319 /* [0x18 = HCI_EV_LINK_KEY_NOTIFY] */
7320 HCI_EV(HCI_EV_LINK_KEY_NOTIFY, hci_link_key_notify_evt,
7321 sizeof(struct hci_ev_link_key_notify)),
7322 /* [0x1c = HCI_EV_CLOCK_OFFSET] */
7323 HCI_EV(HCI_EV_CLOCK_OFFSET, hci_clock_offset_evt,
7324 sizeof(struct hci_ev_clock_offset)),
7325 /* [0x1d = HCI_EV_PKT_TYPE_CHANGE] */
7326 HCI_EV(HCI_EV_PKT_TYPE_CHANGE, hci_pkt_type_change_evt,
7327 sizeof(struct hci_ev_pkt_type_change)),
7328 /* [0x20 = HCI_EV_PSCAN_REP_MODE] */
7329 HCI_EV(HCI_EV_PSCAN_REP_MODE, hci_pscan_rep_mode_evt,
7330 sizeof(struct hci_ev_pscan_rep_mode)),
7331 /* [0x22 = HCI_EV_INQUIRY_RESULT_WITH_RSSI] */
7332 HCI_EV_VL(HCI_EV_INQUIRY_RESULT_WITH_RSSI,
7333 hci_inquiry_result_with_rssi_evt,
7334 sizeof(struct hci_ev_inquiry_result_rssi),
7335 HCI_MAX_EVENT_SIZE),
7336 /* [0x23 = HCI_EV_REMOTE_EXT_FEATURES] */
7337 HCI_EV(HCI_EV_REMOTE_EXT_FEATURES, hci_remote_ext_features_evt,
7338 sizeof(struct hci_ev_remote_ext_features)),
7339 /* [0x2c = HCI_EV_SYNC_CONN_COMPLETE] */
7340 HCI_EV(HCI_EV_SYNC_CONN_COMPLETE, hci_sync_conn_complete_evt,
7341 sizeof(struct hci_ev_sync_conn_complete)),
7342 /* [0x2d = HCI_EV_EXTENDED_INQUIRY_RESULT] */
7343 HCI_EV_VL(HCI_EV_EXTENDED_INQUIRY_RESULT,
7344 hci_extended_inquiry_result_evt,
7345 sizeof(struct hci_ev_ext_inquiry_result), HCI_MAX_EVENT_SIZE),
7346 /* [0x30 = HCI_EV_KEY_REFRESH_COMPLETE] */
7347 HCI_EV(HCI_EV_KEY_REFRESH_COMPLETE, hci_key_refresh_complete_evt,
7348 sizeof(struct hci_ev_key_refresh_complete)),
7349 /* [0x31 = HCI_EV_IO_CAPA_REQUEST] */
7350 HCI_EV(HCI_EV_IO_CAPA_REQUEST, hci_io_capa_request_evt,
7351 sizeof(struct hci_ev_io_capa_request)),
7352 /* [0x32 = HCI_EV_IO_CAPA_REPLY] */
7353 HCI_EV(HCI_EV_IO_CAPA_REPLY, hci_io_capa_reply_evt,
7354 sizeof(struct hci_ev_io_capa_reply)),
7355 /* [0x33 = HCI_EV_USER_CONFIRM_REQUEST] */
7356 HCI_EV(HCI_EV_USER_CONFIRM_REQUEST, hci_user_confirm_request_evt,
7357 sizeof(struct hci_ev_user_confirm_req)),
7358 /* [0x34 = HCI_EV_USER_PASSKEY_REQUEST] */
7359 HCI_EV(HCI_EV_USER_PASSKEY_REQUEST, hci_user_passkey_request_evt,
7360 sizeof(struct hci_ev_user_passkey_req)),
7361 /* [0x35 = HCI_EV_REMOTE_OOB_DATA_REQUEST] */
7362 HCI_EV(HCI_EV_REMOTE_OOB_DATA_REQUEST, hci_remote_oob_data_request_evt,
7363 sizeof(struct hci_ev_remote_oob_data_request)),
7364 /* [0x36 = HCI_EV_SIMPLE_PAIR_COMPLETE] */
7365 HCI_EV(HCI_EV_SIMPLE_PAIR_COMPLETE, hci_simple_pair_complete_evt,
7366 sizeof(struct hci_ev_simple_pair_complete)),
7367 /* [0x3b = HCI_EV_USER_PASSKEY_NOTIFY] */
7368 HCI_EV(HCI_EV_USER_PASSKEY_NOTIFY, hci_user_passkey_notify_evt,
7369 sizeof(struct hci_ev_user_passkey_notify)),
7370 /* [0x3c = HCI_EV_KEYPRESS_NOTIFY] */
7371 HCI_EV(HCI_EV_KEYPRESS_NOTIFY, hci_keypress_notify_evt,
7372 sizeof(struct hci_ev_keypress_notify)),
7373 /* [0x3d = HCI_EV_REMOTE_HOST_FEATURES] */
7374 HCI_EV(HCI_EV_REMOTE_HOST_FEATURES, hci_remote_host_features_evt,
7375 sizeof(struct hci_ev_remote_host_features)),
7376 /* [0x3e = HCI_EV_LE_META] */
7377 HCI_EV_REQ_VL(HCI_EV_LE_META, hci_le_meta_evt,
7378 sizeof(struct hci_ev_le_meta), HCI_MAX_EVENT_SIZE),
7379 /* [0xff = HCI_EV_VENDOR] */
7380 HCI_EV_VL(HCI_EV_VENDOR, msft_vendor_evt, 0, HCI_MAX_EVENT_SIZE),
7381 };
7382
hci_event_func(struct hci_dev * hdev,u8 event,struct sk_buff * skb,u16 * opcode,u8 * status,hci_req_complete_t * req_complete,hci_req_complete_skb_t * req_complete_skb)7383 static void hci_event_func(struct hci_dev *hdev, u8 event, struct sk_buff *skb,
7384 u16 *opcode, u8 *status,
7385 hci_req_complete_t *req_complete,
7386 hci_req_complete_skb_t *req_complete_skb)
7387 {
7388 const struct hci_ev *ev = &hci_ev_table[event];
7389 void *data;
7390
7391 if (!ev->func)
7392 return;
7393
7394 if (skb->len < ev->min_len) {
7395 bt_dev_err(hdev, "unexpected event 0x%2.2x length: %u < %u",
7396 event, skb->len, ev->min_len);
7397 return;
7398 }
7399
7400 /* Just warn if the length is over max_len size it still be
7401 * possible to partially parse the event so leave to callback to
7402 * decide if that is acceptable.
7403 */
7404 if (skb->len > ev->max_len)
7405 bt_dev_warn_ratelimited(hdev,
7406 "unexpected event 0x%2.2x length: %u > %u",
7407 event, skb->len, ev->max_len);
7408
7409 data = hci_ev_skb_pull(hdev, skb, event, ev->min_len);
7410 if (!data)
7411 return;
7412
7413 if (ev->req)
7414 ev->func_req(hdev, data, skb, opcode, status, req_complete,
7415 req_complete_skb);
7416 else
7417 ev->func(hdev, data, skb);
7418 }
7419
hci_event_packet(struct hci_dev * hdev,struct sk_buff * skb)7420 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
7421 {
7422 struct hci_event_hdr *hdr = (void *) skb->data;
7423 hci_req_complete_t req_complete = NULL;
7424 hci_req_complete_skb_t req_complete_skb = NULL;
7425 struct sk_buff *orig_skb = NULL;
7426 u8 status = 0, event, req_evt = 0;
7427 u16 opcode = HCI_OP_NOP;
7428
7429 if (skb->len < sizeof(*hdr)) {
7430 bt_dev_err(hdev, "Malformed HCI Event");
7431 goto done;
7432 }
7433
7434 kfree_skb(hdev->recv_event);
7435 hdev->recv_event = skb_clone(skb, GFP_KERNEL);
7436
7437 event = hdr->evt;
7438 if (!event) {
7439 bt_dev_warn(hdev, "Received unexpected HCI Event 0x%2.2x",
7440 event);
7441 goto done;
7442 }
7443
7444 /* Only match event if command OGF is not for LE */
7445 if (hdev->req_skb &&
7446 hci_opcode_ogf(hci_skb_opcode(hdev->req_skb)) != 0x08 &&
7447 hci_skb_event(hdev->req_skb) == event) {
7448 hci_req_cmd_complete(hdev, hci_skb_opcode(hdev->req_skb),
7449 status, &req_complete, &req_complete_skb);
7450 req_evt = event;
7451 }
7452
7453 /* If it looks like we might end up having to call
7454 * req_complete_skb, store a pristine copy of the skb since the
7455 * various handlers may modify the original one through
7456 * skb_pull() calls, etc.
7457 */
7458 if (req_complete_skb || event == HCI_EV_CMD_STATUS ||
7459 event == HCI_EV_CMD_COMPLETE)
7460 orig_skb = skb_clone(skb, GFP_KERNEL);
7461
7462 skb_pull(skb, HCI_EVENT_HDR_SIZE);
7463
7464 /* Store wake reason if we're suspended */
7465 hci_store_wake_reason(hdev, event, skb);
7466
7467 bt_dev_dbg(hdev, "event 0x%2.2x", event);
7468
7469 hci_event_func(hdev, event, skb, &opcode, &status, &req_complete,
7470 &req_complete_skb);
7471
7472 if (req_complete) {
7473 req_complete(hdev, status, opcode);
7474 } else if (req_complete_skb) {
7475 if (!hci_get_cmd_complete(hdev, opcode, req_evt, orig_skb)) {
7476 kfree_skb(orig_skb);
7477 orig_skb = NULL;
7478 }
7479 req_complete_skb(hdev, status, opcode, orig_skb);
7480 }
7481
7482 done:
7483 kfree_skb(orig_skb);
7484 kfree_skb(skb);
7485 hdev->stat.evt_rx++;
7486 }
7487